FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Matroska file demuxer
3			* Copyright (c) 2003-2008 The FFmpeg Project
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* Matroska file demuxer
25			* @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26			* @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27			* @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28			* @see specs available on the Matroska project page: http://www.matroska.org/
29			*/
30
31			#include "config.h"
32			#include "config_components.h"
33
34			#include <inttypes.h>
35			#include <stdio.h>
36
37			#include "libavutil/attributes.h"
38			#include "libavutil/avstring.h"
39			#include "libavutil/base64.h"
40			#include "libavutil/bprint.h"
41			#include "libavutil/dict.h"
42			#include "libavutil/display.h"
43			#include "libavutil/hdr_dynamic_metadata.h"
44			#include "libavutil/intfloat.h"
45			#include "libavutil/intreadwrite.h"
46			#include "libavutil/lzo.h"
47			#include "libavutil/mastering_display_metadata.h"
48			#include "libavutil/mathematics.h"
49			#include "libavutil/mem.h"
50			#include "libavutil/opt.h"
51			#include "libavutil/pixdesc.h"
52			#include "libavutil/time_internal.h"
53			#include "libavutil/spherical.h"
54
55			#include "libavcodec/bytestream.h"
56			#include "libavcodec/defs.h"
57			#include "libavcodec/flac.h"
58			#include "libavcodec/itut35.h"
59			#include "libavcodec/mpeg4audio.h"
60			#include "libavcodec/packet_internal.h"
61
62			#include "avformat.h"
63			#include "avio_internal.h"
64			#include "demux.h"
65			#include "dovi_isom.h"
66			#include "internal.h"
67			#include "isom.h"
68			#include "matroska.h"
69			#include "oggdec.h"
70			/* For ff_codec_get_id(). */
71			#include "riff.h"
72			#include "rmsipr.h"
73
74			#if CONFIG_BZLIB
75			#include <bzlib.h>
76			#endif
77			#if CONFIG_ZLIB
78			#include <zlib.h>
79			#endif
80
81			#include "qtpalette.h"
82
83			#define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
84			#define NEEDS_CHECKING 2 /* Indicates that some error checks
85			* still need to be performed */
86			#define LEVEL_ENDED 3 /* return value of ebml_parse when the
87			* syntax level used for parsing ended. */
88			#define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
89			* of unknown, potentially damaged data is encountered,
90			* it is considered an error. */
91			#define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
92			* to this many bytes of unknown data for the
93			* SKIP_THRESHOLD check. */
94
95			typedef enum {
96			EBML_NONE,
97			EBML_UINT,
98			EBML_SINT,
99			EBML_FLOAT,
100			EBML_STR,
101			EBML_UTF8,
102			EBML_BIN,
103			EBML_NEST,
104			EBML_LEVEL1,
105			EBML_STOP,
106			EBML_TYPE_COUNT
107			} EbmlType;
108
109			typedef struct CountedElement {
110			union {
111			uint64_t u;
112			int64_t i;
113			double f;
114			char *s;
115			} el;
116			unsigned count;
117			} CountedElement;
118
119			typedef const struct EbmlSyntax {
120			uint32_t id;
121			uint8_t type;
122			uint8_t is_counted;
123			size_t list_elem_size;
124			size_t data_offset;
125			union {
126			int64_t i;
127			uint64_t u;
128			double f;
129			const char *s;
130			const struct EbmlSyntax *n;
131			} def;
132			} EbmlSyntax;
133
134			typedef struct EbmlList {
135			int nb_elem;
136			unsigned int alloc_elem_size;
137			void *elem;
138			} EbmlList;
139
140			typedef struct EbmlBin {
141			int size;
142			AVBufferRef *buf;
143			uint8_t *data;
144			int64_t pos;
145			} EbmlBin;
146
147			typedef struct Ebml {
148			uint64_t version;
149			uint64_t max_size;
150			uint64_t id_length;
151			char *doctype;
152			uint64_t doctype_version;
153			} Ebml;
154
155			typedef struct MatroskaTrackCompression {
156			uint64_t algo;
157			EbmlBin settings;
158			} MatroskaTrackCompression;
159
160			typedef struct MatroskaTrackEncryption {
161			uint64_t algo;
162			EbmlBin key_id;
163			} MatroskaTrackEncryption;
164
165			typedef struct MatroskaTrackEncoding {
166			uint64_t scope;
167			uint64_t type;
168			MatroskaTrackCompression compression;
169			MatroskaTrackEncryption encryption;
170			} MatroskaTrackEncoding;
171
172			typedef struct MatroskaMasteringMeta {
173			double r_x;
174			double r_y;
175			double g_x;
176			double g_y;
177			double b_x;
178			double b_y;
179			double white_x;
180			double white_y;
181			double max_luminance;
182			CountedElement min_luminance;
183			} MatroskaMasteringMeta;
184
185			typedef struct MatroskaTrackVideoColor {
186			uint64_t matrix_coefficients;
187			uint64_t bits_per_channel;
188			uint64_t chroma_sub_horz;
189			uint64_t chroma_sub_vert;
190			uint64_t cb_sub_horz;
191			uint64_t cb_sub_vert;
192			uint64_t chroma_siting_horz;
193			uint64_t chroma_siting_vert;
194			uint64_t range;
195			uint64_t transfer_characteristics;
196			uint64_t primaries;
197			uint64_t max_cll;
198			uint64_t max_fall;
199			MatroskaMasteringMeta mastering_meta;
200			} MatroskaTrackVideoColor;
201
202			typedef struct MatroskaTrackVideoProjection {
203			uint64_t type;
204			EbmlBin private;
205			double yaw;
206			double pitch;
207			double roll;
208			} MatroskaTrackVideoProjection;
209
210			typedef struct MatroskaTrackVideo {
211			double frame_rate;
212			uint64_t display_width;
213			uint64_t display_height;
214			uint64_t pixel_width;
215			uint64_t pixel_height;
216			uint64_t cropped_width;
217			uint64_t cropped_height;
218			EbmlBin color_space;
219			uint64_t pixel_cropt;
220			uint64_t pixel_cropl;
221			uint64_t pixel_cropb;
222			uint64_t pixel_cropr;
223			uint64_t display_unit;
224			uint64_t interlaced;
225			uint64_t field_order;
226			uint64_t stereo_mode;
227			uint64_t alpha_mode;
228			EbmlList color;
229			MatroskaTrackVideoProjection projection;
230			} MatroskaTrackVideo;
231
232			typedef struct MatroskaTrackAudio {
233			double samplerate;
234			double out_samplerate;
235			uint64_t bitdepth;
236			uint64_t channels;
237
238			/* real audio header (extracted from extradata) */
239			int coded_framesize;
240			int sub_packet_h;
241			int frame_size;
242			int sub_packet_size;
243			int sub_packet_cnt;
244			int pkt_cnt;
245			uint64_t buf_timecode;
246			uint8_t *buf;
247			} MatroskaTrackAudio;
248
249			typedef struct MatroskaTrackPlane {
250			uint64_t uid;
251			uint64_t type;
252			} MatroskaTrackPlane;
253
254			typedef struct MatroskaTrackOperation {
255			EbmlList combine_planes;
256			} MatroskaTrackOperation;
257
258			typedef struct MatroskaBlockAdditionMapping {
259			uint64_t value;
260			char *name;
261			uint64_t type;
262			EbmlBin extradata;
263			} MatroskaBlockAdditionMapping;
264
265			typedef struct MatroskaTrack {
266			uint64_t num;
267			uint64_t uid;
268			uint64_t type;
269			char *name;
270			char *codec_id;
271			EbmlBin codec_priv;
272			char *language;
273			double time_scale;
274			uint64_t default_duration;
275			uint64_t flag_default;
276			uint64_t flag_forced;
277			uint64_t flag_comment;
278			uint64_t flag_hearingimpaired;
279			uint64_t flag_visualimpaired;
280			uint64_t flag_textdescriptions;
281			CountedElement flag_original;
282			uint64_t seek_preroll;
283			MatroskaTrackVideo video;
284			MatroskaTrackAudio audio;
285			MatroskaTrackOperation operation;
286			EbmlList encodings;
287			uint64_t codec_delay;
288			uint64_t codec_delay_in_track_tb;
289
290			AVStream *stream;
291			int64_t end_timecode;
292			int ms_compat;
293			int needs_decoding;
294			uint64_t max_block_additional_id;
295			EbmlList block_addition_mappings;
296
297			uint32_t palette[AVPALETTE_COUNT];
298			int has_palette;
299			} MatroskaTrack;
300
301			typedef struct MatroskaAttachment {
302			uint64_t uid;
303			char *filename;
304			char *description;
305			char *mime;
306			EbmlBin bin;
307
308			AVStream *stream;
309			} MatroskaAttachment;
310
311			typedef struct MatroskaChapter {
312			uint64_t start;
313			uint64_t end;
314			uint64_t uid;
315			char *title;
316
317			AVChapter *chapter;
318			} MatroskaChapter;
319
320			typedef struct MatroskaIndexPos {
321			uint64_t track;
322			uint64_t pos;
323			} MatroskaIndexPos;
324
325			typedef struct MatroskaIndex {
326			uint64_t time;
327			EbmlList pos;
328			} MatroskaIndex;
329
330			typedef struct MatroskaTag {
331			char *name;
332			char *string;
333			char *lang;
334			uint64_t def;
335			EbmlList sub;
336			} MatroskaTag;
337
338			typedef struct MatroskaTagTarget {
339			char *type;
340			uint64_t typevalue;
341			uint64_t trackuid;
342			uint64_t chapteruid;
343			uint64_t attachuid;
344			} MatroskaTagTarget;
345
346			typedef struct MatroskaTags {
347			MatroskaTagTarget target;
348			EbmlList tag;
349			} MatroskaTags;
350
351			typedef struct MatroskaSeekhead {
352			uint64_t id;
353			uint64_t pos;
354			} MatroskaSeekhead;
355
356			typedef struct MatroskaLevel {
357			uint64_t start;
358			uint64_t length;
359			} MatroskaLevel;
360
361			typedef struct MatroskaBlockMore {
362			uint64_t additional_id;
363			EbmlBin additional;
364			} MatroskaBlockMore;
365
366			typedef struct MatroskaBlock {
367			uint64_t duration;
368			CountedElement reference;
369			uint64_t non_simple;
370			EbmlBin bin;
371			EbmlList blockmore;
372			int64_t discard_padding;
373			} MatroskaBlock;
374
375			typedef struct MatroskaCluster {
376			MatroskaBlock block;
377			uint64_t timecode;
378			int64_t pos;
379			} MatroskaCluster;
380
381			typedef struct MatroskaLevel1Element {
382			int64_t pos;
383			uint32_t id;
384			int parsed;
385			} MatroskaLevel1Element;
386
387			typedef struct MatroskaDemuxContext {
388			const AVClass *class;
389			AVFormatContext *ctx;
390
391			/* EBML stuff */
392			MatroskaLevel levels[EBML_MAX_DEPTH];
393			int num_levels;
394			uint32_t current_id;
395			int64_t resync_pos;
396			int unknown_count;
397
398			uint64_t time_scale;
399			double duration;
400			char *title;
401			char *muxingapp;
402			EbmlBin date_utc;
403			EbmlList tracks;
404			EbmlList attachments;
405			EbmlList chapters;
406			EbmlList index;
407			EbmlList tags;
408			EbmlList seekhead;
409
410			/* byte position of the segment inside the stream */
411			int64_t segment_start;
412
413			/* This packet coincides with FFFormatContext.parse_pkt
414			* and is not owned by us. */
415			AVPacket *pkt;
416
417			/* the packet queue */
418			PacketList queue;
419
420			int done;
421
422			/* What to skip before effectively reading a packet. */
423			int skip_to_keyframe;
424			uint64_t skip_to_timecode;
425
426			/* File has a CUES element, but we defer parsing until it is needed. */
427			int cues_parsing_deferred;
428
429			/* Level1 elements and whether they were read yet */
430			MatroskaLevel1Element level1_elems[64];
431			int num_level1_elems;
432
433			MatroskaCluster current_cluster;
434
435			int is_webm;
436
437			/* WebM DASH Manifest live flag */
438			int is_live;
439
440			/* Bandwidth value for WebM DASH Manifest */
441			int bandwidth;
442			} MatroskaDemuxContext;
443
444			#define CHILD_OF(parent) { .def = { .n = parent } }
445
446			// The following forward declarations need their size because
447			// a tentative definition with internal linkage must not be an
448			// incomplete type (6.7.2 in C90, 6.9.2 in C99).
449			// Removing the sizes breaks MSVC.
450			static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
451			matroska_track[33], matroska_track_encoding[6], matroska_track_encodings[2],
452			matroska_track_combine_planes[2], matroska_track_operation[2], matroska_block_addition_mapping[5], matroska_tracks[2],
453			matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
454			matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
455			matroska_blockadditions[2], matroska_blockgroup[8], matroska_cluster_parsing[8];
456
457			static EbmlSyntax ebml_header[] = {
458			{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
459			{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, 0, offsetof(Ebml, max_size), { .u = 8 } },
460			{ EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, 0, offsetof(Ebml, id_length), { .u = 4 } },
461			{ EBML_ID_DOCTYPE, EBML_STR, 0, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
462			{ EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
463			{ EBML_ID_EBMLVERSION, EBML_NONE },
464			{ EBML_ID_DOCTYPEVERSION, EBML_NONE },
465			CHILD_OF(ebml_syntax)
466			};
467
468			static EbmlSyntax ebml_syntax[] = {
469			{ EBML_ID_HEADER, EBML_NEST, 0, 0, 0, { .n = ebml_header } },
470			{ MATROSKA_ID_SEGMENT, EBML_STOP },
471			{ 0 }
472			};
473
474			static EbmlSyntax matroska_info[] = {
475			{ MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
476			{ MATROSKA_ID_DURATION, EBML_FLOAT, 0, 0, offsetof(MatroskaDemuxContext, duration) },
477			{ MATROSKA_ID_TITLE, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, title) },
478			{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
479			{ MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, muxingapp) },
480			{ MATROSKA_ID_DATEUTC, EBML_BIN, 0, 0, offsetof(MatroskaDemuxContext, date_utc) },
481			{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
482			CHILD_OF(matroska_segment)
483			};
484
485			static EbmlSyntax matroska_mastering_meta[] = {
486			{ MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_x) },
487			{ MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_y) },
488			{ MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_x) },
489			{ MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_y) },
490			{ MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_x) },
491			{ MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_y) },
492			{ MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_x) },
493			{ MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_y) },
494			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 1, 0, offsetof(MatroskaMasteringMeta, min_luminance) },
495			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, max_luminance) },
496			CHILD_OF(matroska_track_video_color)
497			};
498
499			static EbmlSyntax matroska_track_video_color[] = {
500			{ MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
501			{ MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u = 0 } },
502			{ MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz) },
503			{ MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert) },
504			{ MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz) },
505			{ MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert) },
506			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
507			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
508			{ MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
509			{ MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
510			{ MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
511			{ MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_cll) },
512			{ MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_fall) },
513			{ MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
514			CHILD_OF(matroska_track_video)
515			};
516
517			static EbmlSyntax matroska_track_video_projection[] = {
518			{ MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
519			{ MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideoProjection, private) },
520			{ MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f = 0.0 } },
521			{ MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f = 0.0 } },
522			{ MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f = 0.0 } },
523			CHILD_OF(matroska_track_video)
524			};
525
526			static EbmlSyntax matroska_track_video[] = {
527			{ MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideo, frame_rate) },
528			{ MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
529			{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
530			{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_width) },
531			{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_height) },
532			{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideo, color_space) },
533			{ MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, alpha_mode), { .u = 0 } },
534			{ MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
535			{ MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
536			{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropb), {.u = 0 } },
537			{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropt), {.u = 0 } },
538			{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropl), {.u = 0 } },
539			{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropr), {.u = 0 } },
540			{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
541			{ MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
542			{ MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
543			{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
544			{ MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
545			CHILD_OF(matroska_track)
546			};
547
548			static EbmlSyntax matroska_track_audio[] = {
549			{ MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
550			{ MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
551			{ MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, bitdepth) },
552			{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
553			CHILD_OF(matroska_track)
554			};
555
556			static EbmlSyntax matroska_track_encoding_compression[] = {
557			{ MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackCompression, algo), { .u = MATROSKA_TRACK_ENCODING_COMP_ZLIB } },
558			{ MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, 0, offsetof(MatroskaTrackCompression, settings) },
559			CHILD_OF(matroska_track_encoding)
560			};
561
562			static EbmlSyntax matroska_track_encoding_encryption[] = {
563			{ MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
564			{ MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, 0, offsetof(MatroskaTrackEncryption,key_id) },
565			{ MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
566			{ MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
567			{ MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
568			{ MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
569			{ MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
570			CHILD_OF(matroska_track_encoding)
571			};
572			static EbmlSyntax matroska_track_encoding[] = {
573			{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
574			{ MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
575			{ MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
576			{ MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
577			{ MATROSKA_ID_ENCODINGORDER, EBML_NONE },
578			CHILD_OF(matroska_track_encodings)
579			};
580
581			static EbmlSyntax matroska_track_encodings[] = {
582			{ MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, 0, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
583			CHILD_OF(matroska_track)
584			};
585
586			static EbmlSyntax matroska_track_plane[] = {
587			{ MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,uid) },
588			{ MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,type) },
589			CHILD_OF(matroska_track_combine_planes)
590			};
591
592			static EbmlSyntax matroska_track_combine_planes[] = {
593			{ MATROSKA_ID_TRACKPLANE, EBML_NEST, 0, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
594			CHILD_OF(matroska_track_operation)
595			};
596
597			static EbmlSyntax matroska_track_operation[] = {
598			{ MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, 0, {.n = matroska_track_combine_planes} },
599			CHILD_OF(matroska_track)
600			};
601
602			static EbmlSyntax matroska_block_addition_mapping[] = {
603			{ MATROSKA_ID_BLKADDIDVALUE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, value) },
604			{ MATROSKA_ID_BLKADDIDNAME, EBML_STR, 0, 0, offsetof(MatroskaBlockAdditionMapping, name) },
605			{ MATROSKA_ID_BLKADDIDTYPE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, type), { .u = MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT } },
606			{ MATROSKA_ID_BLKADDIDEXTRADATA, EBML_BIN, 0, 0, offsetof(MatroskaBlockAdditionMapping, extradata) },
607			CHILD_OF(matroska_track)
608			};
609
610			static EbmlSyntax matroska_track[] = {
611			{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, 0, offsetof(MatroskaTrack, num) },
612			{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTrack, name) },
613			{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, uid) },
614			{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrack, type) },
615			{ MATROSKA_ID_CODECID, EBML_STR, 0, 0, offsetof(MatroskaTrack, codec_id) },
616			{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrack, codec_priv) },
617			{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, codec_delay), { .u = 0 } },
618			{ MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
619			{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
620			{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
621			{ MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
622			{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
623			{ MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
624			{ MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_hearingimpaired), { .u = 0 } },
625			{ MATROSKA_ID_TRACKFLAGVISUALIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_visualimpaired), { .u = 0 } },
626			{ MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_textdescriptions), { .u = 0 } },
627			{ MATROSKA_ID_TRACKFLAGORIGINAL, EBML_UINT, 1, 0, offsetof(MatroskaTrack, flag_original), {.u = 0 } },
628			{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
629			{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
630			{ MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
631			{ MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, 0, { .n = matroska_track_encodings } },
632			{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, max_block_additional_id), { .u = 0 } },
633			{ MATROSKA_ID_TRACKBLKADDMAPPING, EBML_NEST, 0, sizeof(MatroskaBlockAdditionMapping), offsetof(MatroskaTrack, block_addition_mappings), { .n = matroska_block_addition_mapping } },
634			{ MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, 0, offsetof(MatroskaTrack, seek_preroll), { .u = 0 } },
635			{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
636			{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
637			{ MATROSKA_ID_CODECNAME, EBML_NONE },
638			{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
639			{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
640			{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
641			{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
642			{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
643			CHILD_OF(matroska_tracks)
644			};
645
646			static EbmlSyntax matroska_tracks[] = {
647			{ MATROSKA_ID_TRACKENTRY, EBML_NEST, 0, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
648			CHILD_OF(matroska_segment)
649			};
650
651			static EbmlSyntax matroska_attachment[] = {
652			{ MATROSKA_ID_FILEUID, EBML_UINT, 0, 0, offsetof(MatroskaAttachment, uid) },
653			{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, filename) },
654			{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, 0, offsetof(MatroskaAttachment, mime) },
655			{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, 0, offsetof(MatroskaAttachment, bin) },
656			{ MATROSKA_ID_FILEDESC, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, description) },
657			CHILD_OF(matroska_attachments)
658			};
659
660			static EbmlSyntax matroska_attachments[] = {
661			{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, 0, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
662			CHILD_OF(matroska_segment)
663			};
664
665			static EbmlSyntax matroska_chapter_display[] = {
666			{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaChapter, title) },
667			{ MATROSKA_ID_CHAPLANG, EBML_NONE },
668			{ MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
669			CHILD_OF(matroska_chapter_entry)
670			};
671
672			static EbmlSyntax matroska_chapter_entry[] = {
673			{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
674			{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
675			{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaChapter, uid) },
676			{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter_display } },
677			{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
678			{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
679			{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
680			{ MATROSKA_ID_CHAPTERATOM, EBML_NONE },
681			CHILD_OF(matroska_chapter)
682			};
683
684			static EbmlSyntax matroska_chapter[] = {
685			{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, 0, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
686			{ MATROSKA_ID_EDITIONUID, EBML_NONE },
687			{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
688			{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
689			{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
690			CHILD_OF(matroska_chapters)
691			};
692
693			static EbmlSyntax matroska_chapters[] = {
694			{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter } },
695			CHILD_OF(matroska_segment)
696			};
697
698			static EbmlSyntax matroska_index_pos[] = {
699			{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, track) },
700			{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, pos) },
701			{ MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
702			{ MATROSKA_ID_CUEDURATION, EBML_NONE },
703			{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
704			CHILD_OF(matroska_index_entry)
705			};
706
707			static EbmlSyntax matroska_index_entry[] = {
708			{ MATROSKA_ID_CUETIME, EBML_UINT, 0, 0, offsetof(MatroskaIndex, time) },
709			{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, 0, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
710			CHILD_OF(matroska_index)
711			};
712
713			static EbmlSyntax matroska_index[] = {
714			{ MATROSKA_ID_POINTENTRY, EBML_NEST, 0, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
715			CHILD_OF(matroska_segment)
716			};
717
718			static EbmlSyntax matroska_simpletag[] = {
719			{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTag, name) },
720			{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaTag, string) },
721			{ MATROSKA_ID_TAGLANG, EBML_STR, 0, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
722			{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
723			{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
724			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
725			CHILD_OF(matroska_tag)
726			};
727
728			static EbmlSyntax matroska_tagtargets[] = {
729			{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, 0, offsetof(MatroskaTagTarget, type) },
730			{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
731			{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, trackuid), { .u = 0 } },
732			{ MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, chapteruid), { .u = 0 } },
733			{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, attachuid), { .u = 0 } },
734			CHILD_OF(matroska_tag)
735			};
736
737			static EbmlSyntax matroska_tag[] = {
738			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
739			{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
740			CHILD_OF(matroska_tags)
741			};
742
743			static EbmlSyntax matroska_tags[] = {
744			{ MATROSKA_ID_TAG, EBML_NEST, 0, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
745			CHILD_OF(matroska_segment)
746			};
747
748			static EbmlSyntax matroska_seekhead_entry[] = {
749			{ MATROSKA_ID_SEEKID, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, id) },
750			{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
751			CHILD_OF(matroska_seekhead)
752			};
753
754			static EbmlSyntax matroska_seekhead[] = {
755			{ MATROSKA_ID_SEEKENTRY, EBML_NEST, 0, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
756			CHILD_OF(matroska_segment)
757			};
758
759			static EbmlSyntax matroska_segment[] = {
760			{ MATROSKA_ID_CLUSTER, EBML_STOP },
761			{ MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, 0, { .n = matroska_info } },
762			{ MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tracks } },
763			{ MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_attachments } },
764			{ MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_chapters } },
765			{ MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, 0, { .n = matroska_index } },
766			{ MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tags } },
767			{ MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, 0, { .n = matroska_seekhead } },
768			{ 0 } /* We don't want to go back to level 0, so don't add the parent. */
769			};
770
771			static EbmlSyntax matroska_segments[] = {
772			{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, 0, { .n = matroska_segment } },
773			{ 0 }
774			};
775
776			static EbmlSyntax matroska_blockmore[] = {
777			{ MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, 0, offsetof(MatroskaBlockMore,additional_id), { .u = MATROSKA_BLOCK_ADD_ID_OPAQUE } },
778			{ MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, 0, offsetof(MatroskaBlockMore,additional) },
779			CHILD_OF(matroska_blockadditions)
780			};
781
782			static EbmlSyntax matroska_blockadditions[] = {
783			{ MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, sizeof(MatroskaBlockMore), offsetof(MatroskaBlock, blockmore), { .n = matroska_blockmore } },
784			CHILD_OF(matroska_blockgroup)
785			};
786
787			static EbmlSyntax matroska_blockgroup[] = {
788			{ MATROSKA_ID_BLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
789			{ MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, 0, { .n = matroska_blockadditions} },
790			{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, 0, offsetof(MatroskaBlock, duration) },
791			{ MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, 0, offsetof(MatroskaBlock, discard_padding) },
792			{ MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 1, 0, offsetof(MatroskaBlock, reference) },
793			{ MATROSKA_ID_CODECSTATE, EBML_NONE },
794			{ 1, EBML_UINT, 0, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
795			CHILD_OF(matroska_cluster_parsing)
796			};
797
798			// The following array contains SimpleBlock and BlockGroup twice
799			// in order to reuse the other values for matroska_cluster_enter.
800			static EbmlSyntax matroska_cluster_parsing[] = {
801			{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
802			{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, 0, { .n = matroska_blockgroup } },
803			{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, 0, offsetof(MatroskaCluster, timecode) },
804			{ MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
805			{ MATROSKA_ID_BLOCKGROUP, EBML_STOP },
806			{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
807			{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
808			CHILD_OF(matroska_segment)
809			};
810
811			static EbmlSyntax matroska_cluster_enter[] = {
812			{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, 0, { .n = &matroska_cluster_parsing[2] } },
813			{ 0 }
814			};
815			#undef CHILD_OF
816
817			static const CodecMime mkv_image_mime_tags[] = {
818			{"image/gif" , AV_CODEC_ID_GIF},
819			{"image/jpeg" , AV_CODEC_ID_MJPEG},
820			{"image/png" , AV_CODEC_ID_PNG},
821			{"image/tiff" , AV_CODEC_ID_TIFF},
822
823			{"" , AV_CODEC_ID_NONE}
824			};
825
826			static const CodecMime mkv_mime_tags[] = {
827			{"application/x-truetype-font", AV_CODEC_ID_TTF},
828			{"application/x-font" , AV_CODEC_ID_TTF},
829			{"application/vnd.ms-opentype", AV_CODEC_ID_OTF},
830			{"binary" , AV_CODEC_ID_BIN_DATA},
831
832			{"" , AV_CODEC_ID_NONE}
833			};
834
835			static const char * const matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT] = {
836			"left",
837			"right",
838			"background",
839			};
840
841			static const char *const matroska_doctypes[] = { "matroska", "webm" };
842
843			/*
844			* This function prepares the status for parsing of level 1 elements.
845			*/
846		198	static int matroska_reset_status(MatroskaDemuxContext *matroska,
847			uint32_t id, int64_t position)
848			{
849		198	int64_t err = 0;
850	2/2 ✓ Branch 0 taken 185 times. ✓ Branch 1 taken 13 times.	198	if (position >= 0) {
851		185	err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
852	1/2 ✓ Branch 0 taken 185 times. ✗ Branch 1 not taken.	185	if (err > 0)
853		185	err = 0;
854			} else
855		13	position = avio_tell(matroska->ctx->pb);
856
857		198	matroska->current_id = id;
858		198	matroska->num_levels = 1;
859		198	matroska->unknown_count = 0;
860		198	matroska->resync_pos = position;
861	2/2 ✓ Branch 0 taken 35 times. ✓ Branch 1 taken 163 times.	198	if (id)
862		35	matroska->resync_pos -= (av_log2(id) + 7) / 8;
863
864		198	return err;
865			}
866
867		13	static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
868			{
869		13	AVIOContext *pb = matroska->ctx->pb;
870			uint32_t id;
871
872			/* Try to seek to the last position to resync from. If this doesn't work,
873			* we resync from the earliest position available: The start of the buffer. */
874	3/4 ✓ Branch 1 taken 13 times. ✗ Branch 2 not taken. ✓ Branch 4 taken 2 times. ✓ Branch 5 taken 11 times.	13	if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
875		2	av_log(matroska->ctx, AV_LOG_WARNING,
876			"Seek to desired resync point failed. Seeking to "
877			"earliest point available instead.\n");
878	1/2 ✓ Branch 1 taken 2 times. ✗ Branch 2 not taken.	2	avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
879			last_pos + 1), SEEK_SET);
880			}
881
882		13	id = avio_rb32(pb);
883
884			// try to find a toplevel element
885	2/2 ✓ Branch 1 taken 690589 times. ✓ Branch 2 taken 10 times.	690599	while (!avio_feof(pb)) {
886	3/6 ✓ Branch 0 taken 690589 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690589 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 690589 times. ✗ Branch 5 not taken.	690589	if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
887	3/4 ✓ Branch 0 taken 690589 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690587 times. ✓ Branch 3 taken 2 times.	690589	id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
888	3/4 ✓ Branch 0 taken 690587 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690586 times. ✓ Branch 3 taken 1 times.	690587	id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
889	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 690586 times.	690586	id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
890			/* Prepare the context for parsing of a level 1 element. */
891		3	matroska_reset_status(matroska, id, -1);
892			/* Given that we are here means that an error has occurred,
893			* so treat the segment as unknown length in order not to
894			* discard valid data that happens to be beyond the designated
895			* end of the segment. */
896		3	matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
897		3	return 0;
898			}
899		690586	id = (id << 8) | avio_r8(pb);
900			}
901
902		10	matroska->done = 1;
903	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return pb->error ? pb->error : AVERROR_EOF;
904			}
905
906			/*
907			* Read: an "EBML number", which is defined as a variable-length
908			* array of bytes. The first byte indicates the length by giving a
909			* number of 0-bits followed by a one. The position of the first
910			* "one" bit inside the first byte indicates the length of this
911			* number.
912			* Returns: number of bytes read, < 0 on error
913			*/
914		143222	static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
915			int max_size, uint64_t *number, int eof_forbidden)
916			{
917		143222	int read, n = 1;
918			uint64_t total;
919			int64_t pos;
920
921			/* The first byte tells us the length in bytes - except when it is zero. */
922		143222	total = avio_r8(pb);
923	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 143208 times.	143222	if (pb->eof_reached)
924		14	goto err;
925
926			/* get the length of the EBML number */
927		143208	read = 8 - ff_log2_tab[total];
928
929	2/4 ✓ Branch 0 taken 143208 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 143208 times.	143208	if (!total || read > max_size) {
930		✗	pos = avio_tell(pb) - 1;
931		✗	if (!total) {
932		✗	av_log(matroska->ctx, AV_LOG_ERROR,
933			"0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
934			"of an EBML number\n", pos, pos);
935			} else {
936		✗	av_log(matroska->ctx, AV_LOG_ERROR,
937			"Length %d indicated by an EBML number's first byte 0x%02x "
938			"at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
939		✗	read, (uint8_t) total, pos, pos, max_size);
940			}
941		✗	return AVERROR_INVALIDDATA;
942			}
943
944			/* read out length */
945		143208	total ^= 1 << ff_log2_tab[total];
946	2/2 ✓ Branch 0 taken 71836 times. ✓ Branch 1 taken 143208 times.	215044	while (n++ < read)
947		71836	total = (total << 8) | avio_r8(pb);
948
949	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 143208 times.	143208	if (pb->eof_reached) {
950		✗	eof_forbidden = 1;
951		✗	goto err;
952			}
953
954		143208	*number = total;
955
956		143208	return read;
957
958		14	err:
959		14	pos = avio_tell(pb);
960	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (pb->error) {
961		✗	av_log(matroska->ctx, AV_LOG_ERROR,
962			"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
963			pos, pos);
964		✗	return pb->error;
965			}
966	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (eof_forbidden) {
967		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
968			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
969		✗	return AVERROR(EIO);
970			}
971		14	return AVERROR_EOF;
972			}
973
974			/**
975			* Read a EBML length value.
976			* This needs special handling for the "unknown length" case which has multiple
977			* encodings.
978			*/
979		56088	static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
980			uint64_t *number)
981			{
982		56088	int res = ebml_read_num(matroska, pb, 8, number, 1);
983	3/4 ✓ Branch 0 taken 56088 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 17 times. ✓ Branch 3 taken 56071 times.	56088	if (res > 0 && *number + 1 == 1ULL << (7 * res))
984		17	*number = EBML_UNKNOWN_LENGTH;
985		56088	return res;
986			}
987
988			/*
989			* Read the next element as an unsigned int.
990			* Returns NEEDS_CHECKING unless size == 0.
991			*/
992		10766	static int ebml_read_uint(AVIOContext *pb, int size,
993			uint64_t default_value, uint64_t *num)
994			{
995		10766	int n = 0;
996
997	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10766 times.	10766	if (size == 0) {
998		✗	*num = default_value;
999		✗	return 0;
1000			}
1001			/* big-endian ordering; build up number */
1002		10766	*num = 0;
1003	2/2 ✓ Branch 0 taken 27180 times. ✓ Branch 1 taken 10766 times.	37946	while (n++ < size)
1004		27180	*num = (*num << 8) | avio_r8(pb);
1005
1006		10766	return NEEDS_CHECKING;
1007			}
1008
1009			/*
1010			* Read the next element as a signed int.
1011			* Returns NEEDS_CHECKING unless size == 0.
1012			*/
1013		160	static int ebml_read_sint(AVIOContext *pb, int size,
1014			int64_t default_value, int64_t *num)
1015			{
1016		160	int n = 1;
1017
1018	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 160 times.	160	if (size == 0) {
1019		✗	*num = default_value;
1020		✗	return 0;
1021			} else {
1022		160	*num = sign_extend(avio_r8(pb), 8);
1023
1024			/* big-endian ordering; build up number */
1025	2/2 ✓ Branch 0 taken 95 times. ✓ Branch 1 taken 160 times.	255	while (n++ < size)
1026		95	*num = ((uint64_t)*num << 8) | avio_r8(pb);
1027			}
1028
1029		160	return NEEDS_CHECKING;
1030			}
1031
1032			/*
1033			* Read the next element as a float.
1034			* Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
1035			*/
1036		756	static int ebml_read_float(AVIOContext *pb, int size,
1037			double default_value, double *num)
1038			{
1039	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 756 times.	756	if (size == 0) {
1040		✗	*num = default_value;
1041		✗	return 0;
1042	2/2 ✓ Branch 0 taken 86 times. ✓ Branch 1 taken 670 times.	756	} else if (size == 4) {
1043		86	*num = av_int2float(avio_rb32(pb));
1044	1/2 ✓ Branch 0 taken 670 times. ✗ Branch 1 not taken.	670	} else if (size == 8) {
1045		670	*num = av_int2double(avio_rb64(pb));
1046			} else
1047		✗	return AVERROR_INVALIDDATA;
1048
1049		756	return NEEDS_CHECKING;
1050			}
1051
1052			/*
1053			* Read the next element as an ASCII string.
1054			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1055			*/
1056		2360	static int ebml_read_ascii(AVIOContext *pb, int size,
1057			const char *default_value, char **str)
1058			{
1059			char *res;
1060			int ret;
1061
1062	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2360 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	2360	if (size == 0 && default_value) {
1063		✗	res = av_strdup(default_value);
1064		✗	if (!res)
1065		✗	return AVERROR(ENOMEM);
1066			} else {
1067			/* EBML strings are usually not 0-terminated, so we allocate one
1068			* byte more, read the string and NUL-terminate it ourselves. */
1069	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2360 times.	2360	if (!(res = av_malloc(size + 1)))
1070		✗	return AVERROR(ENOMEM);
1071	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2360 times.	2360	if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
1072		✗	av_free(res);
1073		✗	return ret < 0 ? ret : NEEDS_CHECKING;
1074			}
1075		2360	(res)[size] = '\0';
1076			}
1077		2360	av_free(*str);
1078		2360	*str = res;
1079
1080		2360	return 0;
1081			}
1082
1083			/*
1084			* Read the next element as binary data.
1085			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1086			*/
1087		31057	static int ebml_read_binary(AVIOContext *pb, int length,
1088			int64_t pos, EbmlBin *bin)
1089			{
1090			int ret;
1091
1092		31057	ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1093	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31057 times.	31057	if (ret < 0)
1094		✗	return ret;
1095		31057	memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1096
1097		31057	bin->data = bin->buf->data;
1098		31057	bin->size = length;
1099		31057	bin->pos = pos;
1100	2/2 ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 31047 times.	31057	if ((ret = avio_read(pb, bin->data, length)) != length) {
1101		10	av_buffer_unref(&bin->buf);
1102		10	bin->data = NULL;
1103		10	bin->size = 0;
1104	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return ret < 0 ? ret : NEEDS_CHECKING;
1105			}
1106
1107		31047	return 0;
1108			}
1109
1110			/*
1111			* Read the next element, but only the header. The contents
1112			* are supposed to be sub-elements which can be read separately.
1113			* 0 is success, < 0 is failure.
1114			*/
1115		7830	static int ebml_read_master(MatroskaDemuxContext *matroska,
1116			uint64_t length, int64_t pos)
1117			{
1118			MatroskaLevel *level;
1119
1120	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7830 times.	7830	if (matroska->num_levels >= EBML_MAX_DEPTH) {
1121		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1122			"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1123		✗	return AVERROR(ENOSYS);
1124			}
1125
1126		7830	level = &matroska->levels[matroska->num_levels++];
1127		7830	level->start = pos;
1128		7830	level->length = length;
1129
1130		7830	return 0;
1131			}
1132
1133			/*
1134			* Read a signed "EBML number"
1135			* Return: number of bytes processed, < 0 on error
1136			*/
1137		236	static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1138			AVIOContext *pb, int64_t *num)
1139			{
1140			uint64_t unum;
1141			int res;
1142
1143			/* read as unsigned number first */
1144	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 236 times.	236	if ((res = ebml_read_num(matroska, pb, 8, &unum, 1)) < 0)
1145		✗	return res;
1146
1147			/* make signed (weird way) */
1148		236	*num = unum - ((1LL << (7 * res - 1)) - 1);
1149
1150		236	return res;
1151			}
1152
1153			static int ebml_parse(MatroskaDemuxContext *matroska,
1154			EbmlSyntax *syntax, void *data);
1155
1156		57985	static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1157			{
1158			int i;
1159
1160			// Whoever touches this should be aware of the duplication
1161			// existing in matroska_cluster_parsing.
1162	2/2 ✓ Branch 0 taken 121821 times. ✓ Branch 1 taken 757 times.	122578	for (i = 0; syntax[i].id; i++)
1163	2/2 ✓ Branch 0 taken 57228 times. ✓ Branch 1 taken 64593 times.	121821	if (id == syntax[i].id)
1164		57228	break;
1165
1166		57985	return &syntax[i];
1167			}
1168
1169		7830	static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1170			void *data)
1171			{
1172			int res;
1173
1174	1/2 ✓ Branch 0 taken 7830 times. ✗ Branch 1 not taken.	7830	if (data) {
1175	2/2 ✓ Branch 0 taken 49825 times. ✓ Branch 1 taken 7830 times.	57655	for (int i = 0; syntax[i].id; i++) {
1176		49825	void *dst = (char *)data + syntax[i].data_offset;
1177	5/5 ✓ Branch 0 taken 21492 times. ✓ Branch 1 taken 968 times. ✓ Branch 2 taken 1441 times. ✓ Branch 3 taken 4010 times. ✓ Branch 4 taken 21914 times.	49825	switch (syntax[i].type) {
1178		21492	case EBML_UINT:
1179		21492	*(uint64_t *)dst = syntax[i].def.u;
1180		21492	break;
1181		968	case EBML_SINT:
1182		968	*(int64_t *) dst = syntax[i].def.i;
1183		968	break;
1184		1441	case EBML_FLOAT:
1185		1441	*(double *) dst = syntax[i].def.f;
1186		1441	break;
1187		4010	case EBML_STR:
1188			case EBML_UTF8:
1189			// the default may be NULL
1190	2/2 ✓ Branch 0 taken 1256 times. ✓ Branch 1 taken 2754 times.	4010	if (syntax[i].def.s) {
1191		1256	*(char**)dst = av_strdup(syntax[i].def.s);
1192	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1256 times.	1256	if (!*(char**)dst)
1193		✗	return AVERROR(ENOMEM);
1194			}
1195		4010	break;
1196			}
1197			}
1198
1199	2/2 ✓ Branch 0 taken 53 times. ✓ Branch 1 taken 7777 times.	7830	if (!matroska->levels[matroska->num_levels - 1].length) {
1200		53	matroska->num_levels--;
1201		53	return 0;
1202			}
1203			}
1204
1205			do {
1206		24530	res = ebml_parse(matroska, syntax, data);
1207	2/2 ✓ Branch 0 taken 16753 times. ✓ Branch 1 taken 7777 times.	24530	} while (!res);
1208
1209	2/2 ✓ Branch 0 taken 1178 times. ✓ Branch 1 taken 6599 times.	7777	return res == LEVEL_ENDED ? 0 : res;
1210			}
1211
1212		2435	static int is_ebml_id_valid(uint32_t id)
1213			{
1214			// Due to endian nonsense in Matroska, the highest byte with any bits set
1215			// will contain the leading length bit. This bit in turn identifies the
1216			// total byte length of the element by its position within the byte.
1217		2435	unsigned int bits = av_log2(id);
1218	2/4 ✓ Branch 0 taken 2435 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 2435 times. ✗ Branch 3 not taken.	2435	return id && (bits + 7) / 8 == (8 - bits % 8);
1219			}
1220
1221			/*
1222			* Allocate and return the entry for the level1 element with the given ID. If
1223			* an entry already exists, return the existing entry.
1224			*/
1225		2435	static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1226			uint32_t id, int64_t pos)
1227			{
1228			int i;
1229			MatroskaLevel1Element *elem;
1230
1231	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2435 times.	2435	if (!is_ebml_id_valid(id))
1232		✗	return NULL;
1233
1234			// Some files link to all clusters; useless.
1235	2/2 ✓ Branch 0 taken 25 times. ✓ Branch 1 taken 2410 times.	2435	if (id == MATROSKA_ID_CLUSTER)
1236		25	return NULL;
1237
1238			// There can be multiple SeekHeads and Tags.
1239	2/2 ✓ Branch 0 taken 4935 times. ✓ Branch 1 taken 1558 times.	6493	for (i = 0; i < matroska->num_level1_elems; i++) {
1240	2/2 ✓ Branch 0 taken 860 times. ✓ Branch 1 taken 4075 times.	4935	if (matroska->level1_elems[i].id == id) {
1241	3/4 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 852 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 8 times.	860	if (matroska->level1_elems[i].pos == pos ||
1242		✗	id != MATROSKA_ID_SEEKHEAD && id != MATROSKA_ID_TAGS)
1243		852	return &matroska->level1_elems[i];
1244			}
1245			}
1246
1247			// Only a completely broken file would have more elements.
1248	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1558 times.	1558	if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1249		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements.\n");
1250		✗	return NULL;
1251			}
1252
1253		1558	elem = &matroska->level1_elems[matroska->num_level1_elems++];
1254		1558	*elem = (MatroskaLevel1Element){.id = id};
1255
1256		1558	return elem;
1257			}
1258
1259		57996	static int ebml_parse(MatroskaDemuxContext *matroska,
1260			EbmlSyntax *syntax, void *data)
1261			{
1262			static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1263			// Forbid unknown-length EBML_NONE elements.
1264			[EBML_NONE] = EBML_UNKNOWN_LENGTH - 1,
1265			[EBML_UINT] = 8,
1266			[EBML_SINT] = 8,
1267			[EBML_FLOAT] = 8,
1268			// max. 16 MB for strings
1269			[EBML_STR] = 0x1000000,
1270			[EBML_UTF8] = 0x1000000,
1271			// max. 256 MB for binary data
1272			[EBML_BIN] = 0x10000000,
1273			// no limits for anything else
1274			};
1275		57996	AVIOContext *pb = matroska->ctx->pb;
1276			uint32_t id;
1277			uint64_t length;
1278		57996	int64_t pos = avio_tell(pb), pos_alt;
1279		57996	int res, update_pos = 1, level_check;
1280			MatroskaLevel1Element *level1_elem;
1281	2/2 ✓ Branch 0 taken 57252 times. ✓ Branch 1 taken 744 times.	57996	MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1282
1283	2/2 ✓ Branch 0 taken 56021 times. ✓ Branch 1 taken 1975 times.	57996	if (!matroska->current_id) {
1284			uint64_t id64;
1285		56021	res = ebml_read_num(matroska, pb, 4, &id64, 0);
1286	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 56007 times.	56021	if (res < 0) {
1287	2/4 ✓ Branch 0 taken 14 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 14 times. ✗ Branch 3 not taken.	14	if (pb->eof_reached && res == AVERROR_EOF) {
1288	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 10 times.	14	if (matroska->is_live)
1289			// in live mode, finish parsing if EOF is reached.
1290		14	return 1;
1291	2/4 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken. ✓ Branch 3 taken 10 times. ✗ Branch 4 not taken.	10	if (level && pos == avio_tell(pb)) {
1292	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	if (level->length == EBML_UNKNOWN_LENGTH) {
1293			// Unknown-length levels automatically end at EOF.
1294		10	matroska->num_levels--;
1295		10	return LEVEL_ENDED;
1296			} else {
1297		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1298			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1299			}
1300			}
1301			}
1302		✗	return res;
1303			}
1304		56007	matroska->current_id = id64 | 1 << 7 * res;
1305		56007	pos_alt = pos + res;
1306			} else {
1307		1975	pos_alt = pos;
1308		1975	pos -= (av_log2(matroska->current_id) + 7) / 8;
1309			}
1310
1311		57982	id = matroska->current_id;
1312
1313		57982	syntax = ebml_parse_id(syntax, id);
1314	6/6 ✓ Branch 0 taken 757 times. ✓ Branch 1 taken 57225 times. ✓ Branch 2 taken 524 times. ✓ Branch 3 taken 233 times. ✓ Branch 4 taken 44 times. ✓ Branch 5 taken 480 times.	57982	if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1315	3/4 ✓ Branch 0 taken 44 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✓ Branch 3 taken 37 times.	44	if (level && level->length == EBML_UNKNOWN_LENGTH) {
1316			// Unknown-length levels end when an element from an upper level
1317			// in the hierarchy is encountered.
1318	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 4 times.	7	while (syntax->def.n) {
1319		3	syntax = ebml_parse_id(syntax->def.n, id);
1320	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (syntax->id) {
1321		3	matroska->num_levels--;
1322		3	return LEVEL_ENDED;
1323			}
1324			// We have not encountered a known element; syntax is a sentinel.
1325			av_assert1(syntax->type == EBML_NONE);
1326			};
1327			}
1328
1329		41	av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1330			"%"PRId64"\n", id, pos);
1331		41	update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1332			}
1333
1334	2/2 ✓ Branch 0 taken 56834 times. ✓ Branch 1 taken 1145 times.	57979	if (data) {
1335		56834	data = (char *) data + syntax->data_offset;
1336	2/2 ✓ Branch 0 taken 3723 times. ✓ Branch 1 taken 53111 times.	56834	if (syntax->list_elem_size) {
1337		3723	EbmlList *list = data;
1338			void *newelem;
1339
1340	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3723 times.	3723	if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1341		✗	return AVERROR(ENOMEM);
1342		3723	newelem = av_fast_realloc(list->elem,
1343			&list->alloc_elem_size,
1344		3723	(list->nb_elem + 1) * syntax->list_elem_size);
1345	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3723 times.	3723	if (!newelem)
1346		✗	return AVERROR(ENOMEM);
1347		3723	list->elem = newelem;
1348		3723	data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1349		3723	memset(data, 0, syntax->list_elem_size);
1350		3723	list->nb_elem++;
1351			}
1352			}
1353
1354	2/2 ✓ Branch 0 taken 55999 times. ✓ Branch 1 taken 1980 times.	57979	if (syntax->type != EBML_STOP) {
1355		55999	matroska->current_id = 0;
1356	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 55999 times.	55999	if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1357		✗	return res;
1358
1359		55999	pos_alt += res;
1360
1361	2/2 ✓ Branch 0 taken 55255 times. ✓ Branch 1 taken 744 times.	55999	if (matroska->num_levels > 0) {
1362	2/2 ✓ Branch 0 taken 55249 times. ✓ Branch 1 taken 6 times.	55255	if (length != EBML_UNKNOWN_LENGTH &&
1363	2/2 ✓ Branch 0 taken 55139 times. ✓ Branch 1 taken 110 times.	110388	level->length != EBML_UNKNOWN_LENGTH) {
1364		55139	uint64_t elem_end = pos_alt + length,
1365		55139	level_end = level->start + level->length;
1366
1367	2/2 ✓ Branch 0 taken 47511 times. ✓ Branch 1 taken 7628 times.	55139	if (elem_end < level_end) {
1368		47511	level_check = 0;
1369	1/2 ✓ Branch 0 taken 7628 times. ✗ Branch 1 not taken.	7628	} else if (elem_end == level_end) {
1370		7628	level_check = LEVEL_ENDED;
1371			} else {
1372		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1373			"Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1374			"containing master element ending at 0x%"PRIx64"\n",
1375			pos, elem_end, level_end);
1376		✗	return AVERROR_INVALIDDATA;
1377			}
1378	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 6 times.	116	} else if (length != EBML_UNKNOWN_LENGTH) {
1379		110	level_check = 0;
1380	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	} else if (level->length != EBML_UNKNOWN_LENGTH) {
1381		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1382			"at 0x%"PRIx64" inside parent with finite size\n", pos);
1383		✗	return AVERROR_INVALIDDATA;
1384			} else {
1385		6	level_check = 0;
1386	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	6	if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1387	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	|| syntax->type == EBML_NEST)) {
1388			// According to the current specifications only clusters and
1389			// segments are allowed to be unknown-length. We also accept
1390			// other unknown-length master elements.
1391		✗	av_log(matroska->ctx, AV_LOG_WARNING,
1392			"Found unknown-length element 0x%"PRIX32" other than "
1393			"a cluster at 0x%"PRIx64". Spec-incompliant, but "
1394			"parsing will nevertheless be attempted.\n", id, pos);
1395		✗	update_pos = -1;
1396			}
1397			}
1398			} else
1399		744	level_check = 0;
1400
1401	4/4 ✓ Branch 0 taken 47839 times. ✓ Branch 1 taken 8160 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 47837 times.	55999	if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1402	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (length != EBML_UNKNOWN_LENGTH) {
1403		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1404			"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1405			"with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1406		✗	length, max_lengths[syntax->type], id, pos);
1407	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	} else if (syntax->type != EBML_NONE) {
1408		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1409			"Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1410			"unknown length, yet the length of an element of its "
1411			"type must be known.\n", id, pos);
1412			} else {
1413		2	av_log(matroska->ctx, AV_LOG_ERROR,
1414			"Found unknown-length element with ID 0x%"PRIX32" at "
1415			"pos. 0x%"PRIx64" for which no syntax for parsing is "
1416			"available.\n", id, pos);
1417			}
1418		2	return AVERROR_INVALIDDATA;
1419			}
1420
1421	2/2 ✓ Branch 0 taken 124 times. ✓ Branch 1 taken 55873 times.	55997	if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1422			// Losing sync will likely manifest itself as encountering unknown
1423			// elements which are not reliably distinguishable from elements
1424			// belonging to future extensions of the format.
1425			// We use a heuristic to detect such situations: If the current
1426			// element is not expected at the current syntax level and there
1427			// were only a few unknown elements in a row, then the element is
1428			// skipped or considered defective based upon the length of the
1429			// current element (i.e. how much would be skipped); if there were
1430			// more than a few skipped elements in a row and skipping the current
1431			// element would lead us more than SKIP_THRESHOLD away from the last
1432			// known good position, then it is inferred that an error occurred.
1433			// The dependency on the number of unknown elements in a row exists
1434			// because the distance to the last known good position is
1435			// automatically big if the last parsed element was big.
1436			// In both cases, each unknown element is considered equivalent to
1437			// UNKNOWN_EQUIV of skipped bytes for the check.
1438			// The whole check is only done for non-seekable output, because
1439			// in this situation skipped data can't simply be rechecked later.
1440			// This is especially important when using unknown length elements
1441			// as the check for whether a child exceeds its containing master
1442			// element is not effective in this situation.
1443	2/2 ✓ Branch 0 taken 122 times. ✓ Branch 1 taken 2 times.	124	if (update_pos) {
1444		122	matroska->unknown_count = 0;
1445			} else {
1446		2	int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1447
1448	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (matroska->unknown_count > 3)
1449		✗	dist += pos_alt - matroska->resync_pos;
1450
1451	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (dist > SKIP_THRESHOLD) {
1452		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1453			"Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1454			"length 0x%"PRIx64" considered as invalid data. Last "
1455			"known good position 0x%"PRIx64", %d unknown elements"
1456			" in a row\n", id, pos, length, matroska->resync_pos,
1457			matroska->unknown_count);
1458		✗	return AVERROR_INVALIDDATA;
1459			}
1460			}
1461			}
1462
1463	2/2 ✓ Branch 0 taken 55958 times. ✓ Branch 1 taken 39 times.	55997	if (update_pos > 0) {
1464			// We have found an element that is allowed at this place
1465			// in the hierarchy and it passed all checks, so treat the beginning
1466			// of the element as the "last known good" position.
1467		55958	matroska->resync_pos = pos;
1468			}
1469
1470	3/4 ✓ Branch 0 taken 337 times. ✓ Branch 1 taken 55660 times. ✓ Branch 2 taken 337 times. ✗ Branch 3 not taken.	55997	if (!data && length != EBML_UNKNOWN_LENGTH)
1471		337	goto skip;
1472			}
1473
1474	8/8 ✓ Branch 0 taken 10766 times. ✓ Branch 1 taken 160 times. ✓ Branch 2 taken 756 times. ✓ Branch 3 taken 2360 times. ✓ Branch 4 taken 31057 times. ✓ Branch 5 taken 7830 times. ✓ Branch 6 taken 1980 times. ✓ Branch 7 taken 2731 times.	57640	switch (syntax->type) {
1475		10766	case EBML_UINT:
1476		10766	res = ebml_read_uint(pb, length, syntax->def.u, data);
1477		10766	break;
1478		160	case EBML_SINT:
1479		160	res = ebml_read_sint(pb, length, syntax->def.i, data);
1480		160	break;
1481		756	case EBML_FLOAT:
1482		756	res = ebml_read_float(pb, length, syntax->def.f, data);
1483		756	break;
1484		2360	case EBML_STR:
1485			case EBML_UTF8:
1486		2360	res = ebml_read_ascii(pb, length, syntax->def.s, data);
1487		2360	break;
1488		31057	case EBML_BIN:
1489		31057	res = ebml_read_binary(pb, length, pos_alt, data);
1490		31057	break;
1491		7830	case EBML_LEVEL1:
1492			case EBML_NEST:
1493	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7830 times.	7830	if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1494		✗	return res;
1495	2/2 ✓ Branch 0 taken 372 times. ✓ Branch 1 taken 7458 times.	7830	if (id == MATROSKA_ID_SEGMENT)
1496		372	matroska->segment_start = pos_alt;
1497	2/2 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 7810 times.	7830	if (id == MATROSKA_ID_CUES)
1498		20	matroska->cues_parsing_deferred = 0;
1499	3/4 ✓ Branch 0 taken 1239 times. ✓ Branch 1 taken 6591 times. ✓ Branch 2 taken 1239 times. ✗ Branch 3 not taken.	9069	if (syntax->type == EBML_LEVEL1 &&
1500		1239	(level1_elem = matroska_find_level1_elem(matroska, syntax->id, pos))) {
1501	2/2 ✓ Branch 0 taken 1217 times. ✓ Branch 1 taken 22 times.	1239	if (!level1_elem->pos) {
1502			// Zero is not a valid position for a level 1 element.
1503		1217	level1_elem->pos = pos;
1504	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 22 times.	22	} else if (level1_elem->pos != pos)
1505		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1506		1239	level1_elem->parsed = 1;
1507			}
1508	2/2 ✓ Branch 1 taken 1178 times. ✓ Branch 2 taken 6652 times.	7830	if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1509		1178	return res;
1510		6652	break;
1511		1980	case EBML_STOP:
1512		1980	return 1;
1513		337	skip:
1514		3068	default:
1515	2/2 ✓ Branch 0 taken 3066 times. ✓ Branch 1 taken 2 times.	3068	if (length) {
1516			int64_t res2;
1517	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3066 times.	3066	if (ffio_limit(pb, length) != length) {
1518			// ffio_limit emits its own error message,
1519			// so we don't have to.
1520		✗	return AVERROR(EIO);
1521			}
1522	1/2 ✓ Branch 1 taken 3066 times. ✗ Branch 2 not taken.	3066	if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1523			// avio_skip might take us past EOF. We check for this
1524			// by skipping only length - 1 bytes, reading a byte and
1525			// checking the error flags. This is done in order to check
1526			// that the element has been properly skipped even when
1527			// no filesize (that ffio_limit relies on) is available.
1528		3066	avio_r8(pb);
1529		3066	res = NEEDS_CHECKING;
1530			} else
1531		✗	res = res2;
1532			} else
1533		2	res = 0;
1534			}
1535	2/2 ✓ Branch 0 taken 14758 times. ✓ Branch 1 taken 40061 times.	54819	if (res) {
1536	1/2 ✓ Branch 0 taken 14758 times. ✗ Branch 1 not taken.	14758	if (res == NEEDS_CHECKING) {
1537	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 14748 times.	14758	if (pb->eof_reached) {
1538	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (pb->error)
1539		✗	res = pb->error;
1540			else
1541		10	res = AVERROR_EOF;
1542			} else
1543		14748	goto level_check;
1544			}
1545
1546	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (res == AVERROR_INVALIDDATA)
1547		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1548	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	else if (res == AVERROR(EIO))
1549		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1550	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	else if (res == AVERROR_EOF) {
1551		10	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1552		10	res = AVERROR(EIO);
1553			}
1554
1555		10	return res;
1556			}
1557
1558		40061	level_check:
1559	3/4 ✓ Branch 0 taken 144 times. ✓ Branch 1 taken 54665 times. ✓ Branch 2 taken 144 times. ✗ Branch 3 not taken.	54809	if (syntax->is_counted && data) {
1560		144	CountedElement *elem = data;
1561	1/2 ✓ Branch 0 taken 144 times. ✗ Branch 1 not taken.	144	if (elem->count != UINT_MAX)
1562		144	elem->count++;
1563			}
1564
1565	4/4 ✓ Branch 0 taken 7563 times. ✓ Branch 1 taken 47246 times. ✓ Branch 2 taken 7533 times. ✓ Branch 3 taken 30 times.	54809	if (level_check == LEVEL_ENDED && matroska->num_levels) {
1566		7533	level = &matroska->levels[matroska->num_levels - 1];
1567		7533	pos = avio_tell(pb);
1568
1569			// Given that pos >= level->start no check for
1570			// level->length != EBML_UNKNOWN_LENGTH is necessary.
1571	4/4 ✓ Branch 0 taken 14413 times. ✓ Branch 1 taken 731 times. ✓ Branch 2 taken 7611 times. ✓ Branch 3 taken 6802 times.	15144	while (matroska->num_levels && pos == level->start + level->length) {
1572		7611	matroska->num_levels--;
1573		7611	level--;
1574			}
1575			}
1576
1577		54809	return level_check;
1578			}
1579
1580		72283	static void ebml_free(EbmlSyntax *syntax, void *data)
1581			{
1582			int i, j;
1583	2/2 ✓ Branch 0 taken 299656 times. ✓ Branch 1 taken 72283 times.	371939	for (i = 0; syntax[i].id; i++) {
1584		299656	void *data_off = (char *) data + syntax[i].data_offset;
1585	4/4 ✓ Branch 0 taken 4004 times. ✓ Branch 1 taken 32623 times. ✓ Branch 2 taken 73017 times. ✓ Branch 3 taken 190012 times.	299656	switch (syntax[i].type) {
1586		4004	case EBML_STR:
1587			case EBML_UTF8:
1588		4004	av_freep(data_off);
1589		4004	break;
1590		32623	case EBML_BIN:
1591		32623	av_buffer_unref(&((EbmlBin *) data_off)->buf);
1592		32623	break;
1593		73017	case EBML_LEVEL1:
1594			case EBML_NEST:
1595	2/2 ✓ Branch 0 taken 35941 times. ✓ Branch 1 taken 37076 times.	73017	if (syntax[i].list_elem_size) {
1596		35941	EbmlList *list = data_off;
1597		35941	char *ptr = list->elem;
1598	2/2 ✓ Branch 0 taken 3723 times. ✓ Branch 1 taken 35941 times.	39664	for (j = 0; j < list->nb_elem;
1599		3723	j++, ptr += syntax[i].list_elem_size)
1600		3723	ebml_free(syntax[i].def.n, ptr);
1601		35941	av_freep(&list->elem);
1602		35941	list->nb_elem = 0;
1603		35941	list->alloc_elem_size = 0;
1604			} else
1605		37076	ebml_free(syntax[i].def.n, data_off);
1606		73017	break;
1607		190012	default:
1608		190012	break;
1609			}
1610			}
1611		72283	}
1612
1613			/*
1614			* Autodetecting...
1615			*/
1616		7480	static int matroska_probe(const AVProbeData *p)
1617			{
1618		7480	uint64_t total = 0;
1619		7480	int len_mask = 0x80, size = 1, n = 1, i;
1620
1621			/* EBML header? */
1622	2/2 ✓ Branch 0 taken 7130 times. ✓ Branch 1 taken 350 times.	7480	if (AV_RB32(p->buf) != EBML_ID_HEADER)
1623		7130	return 0;
1624
1625			/* length of header */
1626		350	total = p->buf[4];
1627	3/4 ✓ Branch 0 taken 2086 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 1736 times. ✓ Branch 3 taken 350 times.	2086	while (size <= 8 && !(total & len_mask)) {
1628		1736	size++;
1629		1736	len_mask >>= 1;
1630			}
1631	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 350 times.	350	if (size > 8)
1632		✗	return 0;
1633		350	total &= (len_mask - 1);
1634	2/2 ✓ Branch 0 taken 1736 times. ✓ Branch 1 taken 350 times.	2086	while (n < size)
1635		1736	total = (total << 8) | p->buf[4 + n++];
1636
1637	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 350 times.	350	if (total + 1 == 1ULL << (7 * size)){
1638			/* Unknown-length header - simply parse the whole buffer. */
1639		✗	total = p->buf_size - 4 - size;
1640			} else {
1641			/* Does the probe data contain the whole header? */
1642	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 350 times.	350	if (p->buf_size < 4 + size + total)
1643		✗	return 0;
1644			}
1645
1646			/* The header should contain a known document type. For now,
1647			* we don't parse the whole header but simply check for the
1648			* availability of that array of characters inside the header.
1649			* Not fully fool-proof, but good enough. */
1650	1/2 ✓ Branch 0 taken 601 times. ✗ Branch 1 not taken.	601	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1651		601	size_t probelen = strlen(matroska_doctypes[i]);
1652	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 601 times.	601	if (total < probelen)
1653		✗	continue;
1654	2/2 ✓ Branch 0 taken 12982 times. ✓ Branch 1 taken 251 times.	13233	for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1655	2/2 ✓ Branch 0 taken 350 times. ✓ Branch 1 taken 12632 times.	12982	if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1656		350	return AVPROBE_SCORE_MAX;
1657			}
1658
1659			// probably valid EBML header but no recognized doctype
1660		✗	return AVPROBE_SCORE_EXTENSION;
1661			}
1662
1663		31381	static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1664			uint64_t num)
1665			{
1666		31381	MatroskaTrack *tracks = matroska->tracks.elem;
1667			int i;
1668
1669	2/2 ✓ Branch 0 taken 34488 times. ✓ Branch 1 taken 1 times.	34489	for (i = 0; i < matroska->tracks.nb_elem; i++)
1670	2/2 ✓ Branch 0 taken 31380 times. ✓ Branch 1 taken 3108 times.	34488	if (tracks[i].num == num)
1671		31380	return &tracks[i];
1672
1673		1	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1674		1	return NULL;
1675			}
1676
1677		82	static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1678			MatroskaTrack *track)
1679			{
1680		82	MatroskaTrackEncoding *encodings = track->encodings.elem;
1681		82	uint8_t *data = *buf;
1682		82	int isize = *buf_size;
1683		82	uint8_t *pkt_data = NULL;
1684			av_unused uint8_t *newpktdata;
1685		82	int pkt_size = isize;
1686		82	int result = 0;
1687			int olen;
1688
1689	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 82 times.	82	if (pkt_size >= 10000000U)
1690		✗	return AVERROR_INVALIDDATA;
1691
1692	4/5 ✓ Branch 0 taken 70 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 6 times. ✓ Branch 3 taken 2 times. ✗ Branch 4 not taken.	82	switch (encodings[0].compression.algo) {
1693		70	case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1694			{
1695		70	int header_size = encodings[0].compression.settings.size;
1696		70	uint8_t *header = encodings[0].compression.settings.data;
1697
1698	2/4 ✓ Branch 0 taken 70 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 70 times.	70	if (header_size && !header) {
1699		✗	av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1700		✗	return -1;
1701			}
1702
1703	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!header_size)
1704		✗	return 0;
1705
1706		70	pkt_size = isize + header_size;
1707		70	pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1708	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!pkt_data)
1709		✗	return AVERROR(ENOMEM);
1710
1711		70	memcpy(pkt_data, header, header_size);
1712		70	memcpy(pkt_data + header_size, data, isize);
1713		70	break;
1714			}
1715		15	case MATROSKA_TRACK_ENCODING_COMP_LZO:
1716			do {
1717		15	int insize = isize;
1718		15	olen = pkt_size *= 3;
1719		15	newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1720		15	+ AV_INPUT_BUFFER_PADDING_SIZE);
1721	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 15 times.	15	if (!newpktdata) {
1722		✗	result = AVERROR(ENOMEM);
1723		✗	goto failed;
1724			}
1725		15	pkt_data = newpktdata;
1726		15	result = av_lzo1x_decode(pkt_data, &olen, data, &insize);
1727	3/4 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 11 times. ✗ Branch 3 not taken.	15	} while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1728	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (result) {
1729		✗	result = AVERROR_INVALIDDATA;
1730		✗	goto failed;
1731			}
1732		4	pkt_size -= olen;
1733		4	break;
1734			#if CONFIG_ZLIB
1735		6	case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1736			{
1737		6	z_stream zstream = { 0 };
1738	2/4 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 6 times.	6	if (!pkt_size || inflateInit(&zstream) != Z_OK)
1739		✗	return -1;
1740		6	zstream.next_in = data;
1741		6	zstream.avail_in = isize;
1742			do {
1743		8	pkt_size *= 3;
1744		8	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1745	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (!newpktdata) {
1746		✗	inflateEnd(&zstream);
1747		✗	result = AVERROR(ENOMEM);
1748		✗	goto failed;
1749			}
1750		8	pkt_data = newpktdata;
1751		8	zstream.avail_out = pkt_size - zstream.total_out;
1752		8	zstream.next_out = pkt_data + zstream.total_out;
1753		8	result = inflate(&zstream, Z_NO_FLUSH);
1754	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 6 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	8	} while (result == Z_OK && pkt_size < 10000000);
1755		6	pkt_size = zstream.total_out;
1756		6	inflateEnd(&zstream);
1757	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (result != Z_STREAM_END) {
1758		✗	if (result == Z_MEM_ERROR)
1759		✗	result = AVERROR(ENOMEM);
1760			else
1761		✗	result = AVERROR_INVALIDDATA;
1762		✗	goto failed;
1763			}
1764		6	break;
1765			}
1766			#endif
1767			#if CONFIG_BZLIB
1768		2	case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1769			{
1770		2	bz_stream bzstream = { 0 };
1771	2/4 ✓ Branch 0 taken 2 times. ✗ Branch 1 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 2 times.	2	if (!pkt_size || BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1772		✗	return -1;
1773		2	bzstream.next_in = data;
1774		2	bzstream.avail_in = isize;
1775			do {
1776		6	pkt_size *= 3;
1777		6	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1778	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!newpktdata) {
1779		✗	BZ2_bzDecompressEnd(&bzstream);
1780		✗	result = AVERROR(ENOMEM);
1781		✗	goto failed;
1782			}
1783		6	pkt_data = newpktdata;
1784		6	bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1785		6	bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1786		6	result = BZ2_bzDecompress(&bzstream);
1787	3/4 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	6	} while (result == BZ_OK && pkt_size < 10000000);
1788		2	pkt_size = bzstream.total_out_lo32;
1789		2	BZ2_bzDecompressEnd(&bzstream);
1790	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (result != BZ_STREAM_END) {
1791		✗	if (result == BZ_MEM_ERROR)
1792		✗	result = AVERROR(ENOMEM);
1793			else
1794		✗	result = AVERROR_INVALIDDATA;
1795		✗	goto failed;
1796			}
1797		2	break;
1798			}
1799			#endif
1800		✗	default:
1801		✗	return AVERROR_INVALIDDATA;
1802			}
1803
1804		82	memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1805
1806		82	*buf = pkt_data;
1807		82	*buf_size = pkt_size;
1808		82	return 0;
1809
1810		✗	failed:
1811		✗	av_free(pkt_data);
1812		✗	return result;
1813			}
1814
1815		204	static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1816			AVDictionary **metadata, char *prefix)
1817			{
1818		204	MatroskaTag *tags = list->elem;
1819			char key[1024];
1820			int i;
1821
1822	2/2 ✓ Branch 0 taken 437 times. ✓ Branch 1 taken 204 times.	641	for (i = 0; i < list->nb_elem; i++) {
1823		1311	const char *lang = tags[i].lang &&
1824	3/4 ✓ Branch 0 taken 437 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 45 times. ✓ Branch 3 taken 392 times.	437	strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1825
1826	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 437 times.	437	if (!tags[i].name) {
1827		✗	av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1828		✗	continue;
1829			}
1830	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 437 times.	437	if (prefix)
1831		✗	snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1832			else
1833		437	av_strlcpy(key, tags[i].name, sizeof(key));
1834	3/4 ✓ Branch 0 taken 437 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 392 times. ✓ Branch 3 taken 45 times.	437	if (tags[i].def || !lang) {
1835		392	av_dict_set(metadata, key, tags[i].string, 0);
1836	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 392 times.	392	if (tags[i].sub.nb_elem)
1837		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1838			}
1839	2/2 ✓ Branch 0 taken 45 times. ✓ Branch 1 taken 392 times.	437	if (lang) {
1840		45	av_strlcat(key, "-", sizeof(key));
1841		45	av_strlcat(key, lang, sizeof(key));
1842		45	av_dict_set(metadata, key, tags[i].string, 0);
1843	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (tags[i].sub.nb_elem)
1844		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1845			}
1846			}
1847		204	ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1848		204	}
1849
1850		372	static void matroska_convert_tags(AVFormatContext *s)
1851			{
1852		372	MatroskaDemuxContext *matroska = s->priv_data;
1853		372	MatroskaTags *tags = matroska->tags.elem;
1854			int i, j;
1855
1856	2/2 ✓ Branch 0 taken 204 times. ✓ Branch 1 taken 372 times.	576	for (i = 0; i < matroska->tags.nb_elem; i++) {
1857	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 201 times.	204	if (tags[i].target.attachuid) {
1858		3	MatroskaAttachment *attachment = matroska->attachments.elem;
1859		3	int found = 0;
1860	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	for (j = 0; j < matroska->attachments.nb_elem; j++) {
1861	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (attachment[j].uid == tags[i].target.attachuid &&
1862	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	attachment[j].stream) {
1863		3	matroska_convert_tag(s, &tags[i].tag,
1864		3	&attachment[j].stream->metadata, NULL);
1865		3	found = 1;
1866			}
1867			}
1868	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1869		✗	av_log(s, AV_LOG_WARNING,
1870			"The tags at index %d refer to a "
1871			"non-existent attachment %"PRId64".\n",
1872		✗	i, tags[i].target.attachuid);
1873			}
1874	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 198 times.	201	} else if (tags[i].target.chapteruid) {
1875		3	MatroskaChapter *chapter = matroska->chapters.elem;
1876		3	int found = 0;
1877	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 3 times.	9	for (j = 0; j < matroska->chapters.nb_elem; j++) {
1878	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	if (chapter[j].uid == tags[i].target.chapteruid &&
1879	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	chapter[j].chapter) {
1880		3	matroska_convert_tag(s, &tags[i].tag,
1881		3	&chapter[j].chapter->metadata, NULL);
1882		3	found = 1;
1883			}
1884			}
1885	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1886		✗	av_log(s, AV_LOG_WARNING,
1887			"The tags at index %d refer to a non-existent chapter "
1888			"%"PRId64".\n",
1889		✗	i, tags[i].target.chapteruid);
1890			}
1891	2/2 ✓ Branch 0 taken 145 times. ✓ Branch 1 taken 53 times.	198	} else if (tags[i].target.trackuid) {
1892		145	MatroskaTrack *track = matroska->tracks.elem;
1893		145	int found = 0;
1894	2/2 ✓ Branch 0 taken 393 times. ✓ Branch 1 taken 145 times.	538	for (j = 0; j < matroska->tracks.nb_elem; j++) {
1895	2/2 ✓ Branch 0 taken 145 times. ✓ Branch 1 taken 248 times.	393	if (track[j].uid == tags[i].target.trackuid &&
1896	1/2 ✓ Branch 0 taken 145 times. ✗ Branch 1 not taken.	145	track[j].stream) {
1897		145	matroska_convert_tag(s, &tags[i].tag,
1898		145	&track[j].stream->metadata, NULL);
1899		145	found = 1;
1900			}
1901			}
1902	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 145 times.	145	if (!found) {
1903		✗	av_log(s, AV_LOG_WARNING,
1904			"The tags at index %d refer to a non-existent track "
1905			"%"PRId64".\n",
1906		✗	i, tags[i].target.trackuid);
1907			}
1908			} else {
1909		53	matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1910		53	tags[i].target.type);
1911			}
1912			}
1913		372	}
1914
1915		24	static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1916			int64_t pos)
1917			{
1918		24	uint32_t saved_id = matroska->current_id;
1919		24	int64_t before_pos = avio_tell(matroska->ctx->pb);
1920		24	int ret = 0;
1921			int ret2;
1922
1923			/* seek */
1924	1/2 ✓ Branch 1 taken 24 times. ✗ Branch 2 not taken.	24	if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1925			/* We don't want to lose our seekhead level, so we add
1926			* a dummy. This is a crude hack. */
1927	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (matroska->num_levels == EBML_MAX_DEPTH) {
1928		✗	av_log(matroska->ctx, AV_LOG_INFO,
1929			"Max EBML element depth (%d) reached, "
1930			"cannot parse further.\n", EBML_MAX_DEPTH);
1931		✗	ret = AVERROR_INVALIDDATA;
1932			} else {
1933		24	matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1934		24	matroska->num_levels++;
1935		24	matroska->current_id = 0;
1936
1937		24	ret = ebml_parse(matroska, matroska_segment, matroska);
1938	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (ret == LEVEL_ENDED) {
1939			/* This can only happen if the seek brought us beyond EOF. */
1940		2	ret = AVERROR_EOF;
1941			}
1942			}
1943			}
1944			/* Seek back - notice that in all instances where this is used
1945			* it is safe to set the level to 1. */
1946		24	ret2 = matroska_reset_status(matroska, saved_id, before_pos);
1947	2/2 ✓ Branch 0 taken 22 times. ✓ Branch 1 taken 2 times.	24	if (ret >= 0)
1948		22	ret = ret2;
1949
1950		24	return ret;
1951			}
1952
1953		372	static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1954			{
1955		372	EbmlList *seekhead_list = &matroska->seekhead;
1956			int i;
1957
1958			// we should not do any seeking in the streaming case
1959	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 371 times.	372	if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1960		1	return;
1961
1962	2/2 ✓ Branch 0 taken 1196 times. ✓ Branch 1 taken 370 times.	1566	for (i = 0; i < seekhead_list->nb_elem; i++) {
1963		1196	MatroskaSeekhead *seekheads = seekhead_list->elem;
1964		1196	uint32_t id = seekheads[i].id;
1965		1196	int64_t pos = seekheads[i].pos + matroska->segment_start;
1966			MatroskaLevel1Element *elem;
1967
1968	2/4 ✓ Branch 0 taken 1196 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 1196 times.	1196	if (id != seekheads[i].id || pos < matroska->segment_start)
1969		✗	continue;
1970
1971		1196	elem = matroska_find_level1_elem(matroska, id, pos);
1972	4/4 ✓ Branch 0 taken 1171 times. ✓ Branch 1 taken 25 times. ✓ Branch 2 taken 830 times. ✓ Branch 3 taken 341 times.	1196	if (!elem || elem->parsed)
1973		855	continue;
1974
1975		341	elem->pos = pos;
1976
1977			// defer cues parsing until we actually need cue data.
1978	2/2 ✓ Branch 0 taken 329 times. ✓ Branch 1 taken 12 times.	341	if (id == MATROSKA_ID_CUES)
1979		329	continue;
1980
1981	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1982			// mark index as broken
1983		1	matroska->cues_parsing_deferred = -1;
1984		1	break;
1985			}
1986
1987		11	elem->parsed = 1;
1988			}
1989			}
1990
1991		385	static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1992			{
1993			EbmlList *index_list;
1994			MatroskaIndex *index;
1995		385	uint64_t index_scale = 1;
1996			int i, j;
1997
1998	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 385 times.	385	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1999		✗	return;
2000
2001		385	index_list = &matroska->index;
2002		385	index = index_list->elem;
2003	2/2 ✓ Branch 0 taken 367 times. ✓ Branch 1 taken 18 times.	385	if (index_list->nb_elem < 2)
2004		367	return;
2005	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 18 times.	18	if (index[1].time > 1E14 / matroska->time_scale) {
2006		✗	av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
2007		✗	return;
2008			}
2009	2/2 ✓ Branch 0 taken 538 times. ✓ Branch 1 taken 18 times.	556	for (i = 0; i < index_list->nb_elem; i++) {
2010		538	EbmlList *pos_list = &index[i].pos;
2011		538	MatroskaIndexPos *pos = pos_list->elem;
2012	2/2 ✓ Branch 0 taken 656 times. ✓ Branch 1 taken 538 times.	1194	for (j = 0; j < pos_list->nb_elem; j++) {
2013		656	MatroskaTrack *track = matroska_find_track_by_num(matroska,
2014		656	pos[j].track);
2015	2/4 ✓ Branch 0 taken 656 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 656 times. ✗ Branch 3 not taken.	656	if (track && track->stream)
2016		656	av_add_index_entry(track->stream,
2017		656	pos[j].pos + matroska->segment_start,
2018		656	index[i].time / index_scale, 0, 0,
2019			AVINDEX_KEYFRAME);
2020			}
2021			}
2022			}
2023
2024		13	static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
2025			int i;
2026
2027	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 13 times.	13	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
2028		✗	return;
2029
2030	2/2 ✓ Branch 0 taken 53 times. ✓ Branch 1 taken 1 times.	54	for (i = 0; i < matroska->num_level1_elems; i++) {
2031		53	MatroskaLevel1Element *elem = &matroska->level1_elems[i];
2032	3/4 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 41 times. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken.	53	if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
2033	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
2034		1	matroska->cues_parsing_deferred = -1;
2035		12	elem->parsed = 1;
2036		12	break;
2037			}
2038			}
2039
2040		13	matroska_add_index_entries(matroska);
2041			}
2042
2043		447	static int matroska_parse_content_encodings(MatroskaTrackEncoding *encodings,
2044			unsigned nb_encodings,
2045			MatroskaTrack *track,
2046			char **key_id_base64, void *logctx)
2047			{
2048	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (nb_encodings > 1) {
2049		✗	av_log(logctx, AV_LOG_ERROR,
2050			"Multiple combined encodings not supported\n");
2051		✗	return 0;
2052			}
2053	2/2 ✓ Branch 0 taken 435 times. ✓ Branch 1 taken 12 times.	447	if (!nb_encodings)
2054		435	return 0;
2055	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (encodings->type) {
2056		✗	if (encodings->encryption.key_id.size > 0) {
2057			/* Save the encryption key id to be stored later
2058			* as a metadata tag. */
2059		✗	const int b64_size = AV_BASE64_SIZE(encodings->encryption.key_id.size);
2060		✗	*key_id_base64 = av_malloc(b64_size);
2061		✗	if (!*key_id_base64)
2062		✗	return AVERROR(ENOMEM);
2063
2064		✗	av_base64_encode(*key_id_base64, b64_size,
2065		✗	encodings->encryption.key_id.data,
2066			encodings->encryption.key_id.size);
2067			} else {
2068		✗	encodings->scope = 0;
2069		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2070			}
2071		12	} else if (
2072			#if CONFIG_ZLIB
2073	2/2 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 3 times.	12	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2074			#endif
2075			#if CONFIG_BZLIB
2076	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 1 times.	9	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2077			#endif
2078	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 1 times.	8	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2079	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2080		✗	encodings->scope = 0;
2081		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2082	4/4 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 3 times. ✓ Branch 2 taken 1 times. ✓ Branch 3 taken 8 times.	12	} else if (track->codec_priv.size && encodings[0].scope & 2) {
2083		1	uint8_t *codec_priv = track->codec_priv.data;
2084		1	int ret = matroska_decode_buffer(&track->codec_priv.data,
2085			&track->codec_priv.size,
2086			track);
2087	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0) {
2088		✗	track->codec_priv.data = NULL;
2089		✗	track->codec_priv.size = 0;
2090		✗	av_log(logctx, AV_LOG_ERROR,
2091			"Failed to decode codec private data\n");
2092			}
2093
2094	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (codec_priv != track->codec_priv.data) {
2095		1	av_buffer_unref(&track->codec_priv.buf);
2096	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.data) {
2097		2	track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2098		1	track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2099			NULL, NULL, 0);
2100	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (!track->codec_priv.buf) {
2101		✗	av_freep(&track->codec_priv.data);
2102		✗	track->codec_priv.size = 0;
2103		✗	return AVERROR(ENOMEM);
2104			}
2105			}
2106			}
2107			}
2108		36	track->needs_decoding = !encodings->type &&
2109	2/4 ✓ Branch 0 taken 12 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken.	24	encodings->scope & 1 &&
2110	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 5 times.	12	(encodings->compression.algo !=
2111		7	MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP ||
2112	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	encodings->compression.settings.size);
2113
2114		12	return 0;
2115			}
2116
2117		✗	static int matroska_aac_profile(char *codec_id)
2118			{
2119			static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
2120			int profile;
2121
2122		✗	for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
2123		✗	if (strstr(codec_id, aac_profiles[profile]))
2124		✗	break;
2125		✗	return profile + 1;
2126			}
2127
2128		✗	static int matroska_aac_sri(int samplerate)
2129			{
2130			int sri;
2131
2132		✗	for (sri = 0; sri < FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
2133		✗	if (ff_mpeg4audio_sample_rates[sri] == samplerate)
2134		✗	break;
2135		✗	return sri;
2136			}
2137
2138		18	static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
2139			{
2140			/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
2141		18	ff_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
2142		18	}
2143
2144		9	static int matroska_parse_flac(AVFormatContext *s,
2145			MatroskaTrack *track,
2146			int *offset)
2147			{
2148		9	AVStream *st = track->stream;
2149		9	uint8_t *p = track->codec_priv.data;
2150		9	int size = track->codec_priv.size;
2151
2152	2/4 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 9 times.	9	if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
2153		✗	av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
2154		✗	track->codec_priv.size = 0;
2155		✗	return 0;
2156			}
2157		9	*offset = 8;
2158		9	track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
2159
2160		9	p += track->codec_priv.size;
2161		9	size -= track->codec_priv.size;
2162
2163			/* parse the remaining metadata blocks if present */
2164	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 9 times.	17	while (size >= 4) {
2165			int block_last, block_type, block_size;
2166
2167		8	flac_parse_block_header(p, &block_last, &block_type, &block_size);
2168
2169		8	p += 4;
2170		8	size -= 4;
2171	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (block_size > size)
2172		✗	return 0;
2173
2174			/* check for the channel mask */
2175	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
2176		8	AVDictionary *dict = NULL;
2177			AVDictionaryEntry *chmask;
2178
2179		8	ff_vorbis_comment(s, &dict, p, block_size, 0);
2180		8	chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2181	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (chmask) {
2182		8	uint64_t mask = strtol(chmask->value, NULL, 0);
2183	2/4 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 8 times.	8	if (!mask || mask & ~0x3ffffULL) {
2184		✗	av_log(s, AV_LOG_WARNING,
2185			"Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2186			} else
2187		8	av_channel_layout_from_mask(&st->codecpar->ch_layout, mask);
2188			}
2189		8	av_dict_free(&dict);
2190			}
2191
2192		8	p += block_size;
2193		8	size -= block_size;
2194			}
2195
2196		9	return 0;
2197			}
2198
2199		7	static int mkv_field_order(const MatroskaDemuxContext *matroska, uint64_t field_order)
2200			{
2201		7	int minor, micro, bttb = 0;
2202
2203			/* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2204			* this function, and fixed in 57.52 */
2205	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 7 times.	7	if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf57.%d.%d", &minor, &micro) == 2)
2206		✗	bttb = (minor >= 36 && minor <= 51 && micro >= 100);
2207
2208	2/7 ✗ Branch 0 not taken. ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times. ✓ Branch 3 taken 1 times. ✗ Branch 4 not taken. ✗ Branch 5 not taken. ✗ Branch 6 not taken.	7	switch (field_order) {
2209		✗	case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
2210		✗	return AV_FIELD_PROGRESSIVE;
2211		✗	case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
2212		✗	return AV_FIELD_UNKNOWN;
2213		6	case MATROSKA_VIDEO_FIELDORDER_TT:
2214		6	return AV_FIELD_TT;
2215		1	case MATROSKA_VIDEO_FIELDORDER_BB:
2216		1	return AV_FIELD_BB;
2217		✗	case MATROSKA_VIDEO_FIELDORDER_BT:
2218		✗	return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2219		✗	case MATROSKA_VIDEO_FIELDORDER_TB:
2220		✗	return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2221		✗	default:
2222		✗	return AV_FIELD_UNKNOWN;
2223			}
2224			}
2225
2226		12	static void mkv_stereo_mode_display_mul(int stereo_mode,
2227			int *h_width, int *h_height)
2228			{
2229	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 4 times. ✓ Branch 3 taken 4 times.	12	switch (stereo_mode) {
2230		✗	case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
2231			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
2232			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
2233			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
2234			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
2235		✗	break;
2236		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
2237			case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
2238			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
2239			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
2240		4	*h_width = 2;
2241		4	break;
2242		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
2243			case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
2244			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
2245			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
2246		4	*h_height = 2;
2247		4	break;
2248			}
2249		12	}
2250
2251		236	static int mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
2252			{
2253			static const struct {
2254			char type;
2255			char flags;
2256			} stereo_mode_conv [] = {
2257			#define STEREO_MODE_CONV(STEREOMODETYPE, STEREO3DTYPE, FLAGS, WDIV, HDIV, WEBM) \
2258			[(STEREOMODETYPE)] = { .type = (STEREO3DTYPE), .flags = (FLAGS) },
2259			#define NOTHING(STEREOMODETYPE, WDIV, HDIV, WEBM)
2260			STEREOMODE_STEREO3D_MAPPING(STEREO_MODE_CONV, NOTHING)
2261			};
2262			AVStereo3D *stereo;
2263			size_t size;
2264
2265		236	stereo = av_stereo3d_alloc_size(&size);
2266	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (!stereo)
2267		✗	return AVERROR(ENOMEM);
2268
2269		236	stereo->type = stereo_mode_conv[stereo_mode].type;
2270		236	stereo->flags = stereo_mode_conv[stereo_mode].flags;
2271
2272	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 236 times.	236	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2273			AV_PKT_DATA_STEREO3D, stereo, size, 0)) {
2274		✗	av_freep(&stereo);
2275		✗	return AVERROR(ENOMEM);
2276			}
2277
2278		236	return 0;
2279			}
2280
2281		339	static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2282		339	const MatroskaTrackVideoColor *color = track->video.color.elem;
2283			const MatroskaMasteringMeta *mastering_meta;
2284			int has_mastering_primaries, has_mastering_luminance;
2285
2286	2/2 ✓ Branch 0 taken 275 times. ✓ Branch 1 taken 64 times.	339	if (!track->video.color.nb_elem)
2287		275	return 0;
2288
2289		64	mastering_meta = &color->mastering_meta;
2290			// Mastering primaries are CIE 1931 coords, and must be > 0.
2291		64	has_mastering_primaries =
2292	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2293	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	7	mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2294	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	7	mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2295	4/6 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 57 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 7 times. ✗ Branch 5 not taken.	71	mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2296		128	has_mastering_luminance = mastering_meta->max_luminance >
2297		71	mastering_meta->min_luminance.el.f &&
2298	3/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 57 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	71	mastering_meta->min_luminance.el.f >= 0 &&
2299	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->min_luminance.count;
2300
2301	1/2 ✓ Branch 0 taken 64 times. ✗ Branch 1 not taken.	64	if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2302		64	st->codecpar->color_space = color->matrix_coefficients;
2303	1/2 ✓ Branch 0 taken 64 times. ✗ Branch 1 not taken.	64	if (color->primaries != AVCOL_PRI_RESERVED &&
2304	2/2 ✓ Branch 0 taken 62 times. ✓ Branch 1 taken 2 times.	64	color->primaries != AVCOL_PRI_RESERVED0)
2305		62	st->codecpar->color_primaries = color->primaries;
2306	1/2 ✓ Branch 0 taken 64 times. ✗ Branch 1 not taken.	64	if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2307	2/2 ✓ Branch 0 taken 62 times. ✓ Branch 1 taken 2 times.	64	color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2308		62	st->codecpar->color_trc = color->transfer_characteristics;
2309	2/2 ✓ Branch 0 taken 44 times. ✓ Branch 1 taken 20 times.	64	if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2310	1/2 ✓ Branch 0 taken 44 times. ✗ Branch 1 not taken.	44	color->range <= AVCOL_RANGE_JPEG)
2311		44	st->codecpar->color_range = color->range;
2312	2/2 ✓ Branch 0 taken 43 times. ✓ Branch 1 taken 21 times.	64	if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2313	1/2 ✓ Branch 0 taken 43 times. ✗ Branch 1 not taken.	43	color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2314	1/2 ✓ Branch 0 taken 43 times. ✗ Branch 1 not taken.	43	color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2315	1/2 ✓ Branch 0 taken 43 times. ✗ Branch 1 not taken.	43	color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2316		43	st->codecpar->chroma_location =
2317		43	av_chroma_location_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2318		43	(color->chroma_siting_vert - 1) << 7);
2319			}
2320	3/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 57 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	64	if (color->max_cll && color->max_fall) {
2321		7	size_t size = 0;
2322		7	AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
2323	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2324		✗	return AVERROR(ENOMEM);
2325	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times.	7	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2326			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, metadata, size, 0)) {
2327		✗	av_freep(&metadata);
2328		✗	return AVERROR(ENOMEM);
2329			}
2330		7	metadata->MaxCLL = color->max_cll;
2331		7	metadata->MaxFALL = color->max_fall;
2332			}
2333
2334	3/4 ✓ Branch 0 taken 57 times. ✓ Branch 1 taken 7 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 57 times.	64	if (has_mastering_primaries || has_mastering_luminance) {
2335		7	size_t size = 0;
2336		7	AVMasteringDisplayMetadata *metadata = av_mastering_display_metadata_alloc_size(&size);
2337	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2338		✗	return AVERROR(ENOMEM);
2339	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times.	7	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2340			AV_PKT_DATA_MASTERING_DISPLAY_METADATA, metadata, size, 0)) {
2341		✗	av_freep(&metadata);
2342		✗	return AVERROR(ENOMEM);
2343			}
2344	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_primaries) {
2345		7	metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
2346		7	metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
2347		7	metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
2348		7	metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
2349		7	metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
2350		7	metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
2351		7	metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
2352		7	metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
2353		7	metadata->has_primaries = 1;
2354			}
2355	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_luminance) {
2356		7	metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
2357		7	metadata->min_luminance = av_d2q(mastering_meta->min_luminance.el.f, INT_MAX);
2358		7	metadata->has_luminance = 1;
2359			}
2360			}
2361		64	return 0;
2362			}
2363
2364		333	static int mkv_create_display_matrix(AVStream *st,
2365			const MatroskaTrackVideoProjection *proj,
2366			void *logctx)
2367			{
2368			AVPacketSideData *sd;
2369		333	double pitch = proj->pitch, yaw = proj->yaw, roll = proj->roll;
2370			int32_t *matrix;
2371			int hflip;
2372
2373	5/6 ✓ Branch 0 taken 333 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 326 times. ✓ Branch 3 taken 7 times. ✓ Branch 4 taken 324 times. ✓ Branch 5 taken 2 times.	333	if (pitch == 0.0 && yaw == 0.0 && roll == 0.0)
2374		324	return 0;
2375
2376			/* Note: The following constants are exactly representable
2377			* as floating-point numbers. */
2378	7/10 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✓ Branch 3 taken 2 times. ✓ Branch 4 taken 3 times. ✓ Branch 5 taken 4 times. ✓ Branch 6 taken 3 times. ✗ Branch 7 not taken. ✗ Branch 8 not taken. ✓ Branch 9 taken 9 times.	9	if (pitch != 0.0 || (yaw != 0.0 && yaw != 180.0 && yaw != -180.0) ||
2379			isnan(roll)) {
2380		✗	av_log(logctx, AV_LOG_WARNING, "Ignoring non-2D rectangular "
2381			"projection in stream %u (yaw %f, pitch %f, roll %f)\n",
2382			st->index, yaw, pitch, roll);
2383		✗	return 0;
2384			}
2385		9	sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2386		9	&st->codecpar->nb_coded_side_data,
2387			AV_PKT_DATA_DISPLAYMATRIX,
2388			9 * sizeof(*matrix), 0);
2389	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 9 times.	9	if (!sd)
2390		✗	return AVERROR(ENOMEM);
2391		9	matrix = (int32_t*)sd->data;
2392
2393		9	hflip = yaw != 0.0;
2394			/* ProjectionPoseRoll is in the counter-clockwise direction
2395			* whereas av_display_rotation_set() expects its argument
2396			* to be oriented clockwise, so we need to negate roll.
2397			* Furthermore, if hflip is set, we need to negate it again
2398			* to account for the fact that the Matroska specifications
2399			* require the yaw rotation to be applied first. */
2400		9	av_display_rotation_set(matrix, roll * (2 * hflip - 1));
2401		9	av_display_matrix_flip(matrix, hflip, 0);
2402
2403		9	return 0;
2404			}
2405
2406		339	static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track,
2407			void *logctx)
2408			{
2409			AVSphericalMapping *spherical;
2410		339	const MatroskaTrackVideoProjection *mkv_projection = &track->video.projection;
2411		339	const uint8_t *priv_data = mkv_projection->private.data;
2412			enum AVSphericalProjection projection;
2413			size_t spherical_size;
2414		339	uint32_t l = 0, t = 0, r = 0, b = 0;
2415		339	uint32_t padding = 0;
2416
2417	3/4 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 333 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 6 times.	339	if (mkv_projection->private.size && priv_data[0] != 0) {
2418		✗	av_log(logctx, AV_LOG_WARNING, "Unknown spherical metadata\n");
2419		✗	return 0;
2420			}
2421
2422	2/4 ✓ Branch 0 taken 333 times. ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	339	switch (track->video.projection.type) {
2423		333	case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2424		333	return mkv_create_display_matrix(st, mkv_projection, logctx);
2425		6	case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2426	1/2 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken.	6	if (track->video.projection.private.size == 20) {
2427		6	t = AV_RB32(priv_data + 4);
2428		6	b = AV_RB32(priv_data + 8);
2429		6	l = AV_RB32(priv_data + 12);
2430		6	r = AV_RB32(priv_data + 16);
2431
2432	2/4 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 6 times.	6	if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2433		✗	av_log(logctx, AV_LOG_ERROR,
2434			"Invalid bounding rectangle coordinates "
2435			"%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2436			l, t, r, b);
2437		✗	return AVERROR_INVALIDDATA;
2438			}
2439		✗	} else if (track->video.projection.private.size != 0) {
2440		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2441		✗	return AVERROR_INVALIDDATA;
2442			}
2443
2444	1/8 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✗ Branch 5 not taken. ✗ Branch 6 not taken. ✗ Branch 7 not taken.	6	if (l || t || r || b)
2445		6	projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2446			else
2447		✗	projection = AV_SPHERICAL_EQUIRECTANGULAR;
2448		6	break;
2449		✗	case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2450		✗	if (track->video.projection.private.size < 4) {
2451		✗	av_log(logctx, AV_LOG_ERROR, "Missing projection private properties\n");
2452		✗	return AVERROR_INVALIDDATA;
2453		✗	} else if (track->video.projection.private.size == 12) {
2454		✗	uint32_t layout = AV_RB32(priv_data + 4);
2455		✗	if (layout) {
2456		✗	av_log(logctx, AV_LOG_WARNING,
2457			"Unknown spherical cubemap layout %"PRIu32"\n", layout);
2458		✗	return 0;
2459			}
2460		✗	projection = AV_SPHERICAL_CUBEMAP;
2461		✗	padding = AV_RB32(priv_data + 8);
2462			} else {
2463		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2464		✗	return AVERROR_INVALIDDATA;
2465			}
2466		✗	break;
2467		✗	default:
2468		✗	av_log(logctx, AV_LOG_WARNING,
2469			"Unknown spherical metadata type %"PRIu64"\n",
2470		✗	track->video.projection.type);
2471		✗	return 0;
2472			}
2473
2474		6	spherical = av_spherical_alloc(&spherical_size);
2475	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!spherical)
2476		✗	return AVERROR(ENOMEM);
2477
2478		6	spherical->projection = projection;
2479
2480		6	spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2481		6	spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2482		6	spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2483
2484		6	spherical->padding = padding;
2485
2486		6	spherical->bound_left = l;
2487		6	spherical->bound_top = t;
2488		6	spherical->bound_right = r;
2489		6	spherical->bound_bottom = b;
2490
2491	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times.	6	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2492			AV_PKT_DATA_SPHERICAL, spherical, spherical_size, 0)) {
2493		✗	av_freep(&spherical);
2494		✗	return AVERROR(ENOMEM);
2495			}
2496
2497		6	return 0;
2498			}
2499
2500		4	static int mkv_parse_dvcc_dvvc(AVFormatContext *s, AVStream *st, const MatroskaTrack *track,
2501			EbmlBin *bin)
2502			{
2503		4	return ff_isom_parse_dvcc_dvvc(s, st, bin->data, bin->size);
2504			}
2505
2506		447	static int mkv_parse_block_addition_mappings(AVFormatContext *s, AVStream *st, MatroskaTrack *track)
2507			{
2508		447	const EbmlList *mappings_list = &track->block_addition_mappings;
2509		447	MatroskaBlockAdditionMapping *mappings = mappings_list->elem;
2510			int ret;
2511
2512	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 447 times.	453	for (int i = 0; i < mappings_list->nb_elem; i++) {
2513		6	MatroskaBlockAdditionMapping *mapping = &mappings[i];
2514		6	uint64_t type = mapping->type;
2515
2516	2/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	6	switch (mapping->type) {
2517		✗	case MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT:
2518		✗	av_log(s, AV_LOG_DEBUG,
2519			"Explicit block Addition Mapping type \"Use BlockAddIDValue\", value %"PRIu64","
2520		✗	" name \"%s\" found.\n", mapping->value, mapping->name ? mapping->name : "");
2521		✗	type = MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE;
2522			av_fallthrough;
2523		2	case MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE:
2524			case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35:
2525	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (mapping->value != type) {
2526		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2527		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2528			"Invalid Block Addition Value 0x%"PRIx64" for Block Addition Mapping Type "
2529			"0x%"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2530		✗	mapping->name ? mapping->name : "");
2531		✗	if (strict)
2532		✗	return AVERROR_INVALIDDATA;
2533			}
2534		2	break;
2535		4	case MATROSKA_BLOCK_ADD_ID_TYPE_DVCC:
2536			case MATROSKA_BLOCK_ADD_ID_TYPE_DVVC:
2537	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if ((ret = mkv_parse_dvcc_dvvc(s, st, track, &mapping->extradata)) < 0)
2538		✗	return ret;
2539
2540		4	break;
2541		✗	default:
2542		✗	av_log(s, AV_LOG_DEBUG,
2543			"Unknown Block Addition Mapping type 0x%"PRIx64", value %"PRIu64", name \"%s\"\n",
2544		✗	mapping->type, mapping->value, mapping->name ? mapping->name : "");
2545		✗	if (mapping->value < 2) {
2546		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2547		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2548			"Invalid Block Addition value 0x%"PRIu64" for unknown Block Addition Mapping "
2549			"type %"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2550		✗	mapping->name ? mapping->name : "");
2551		✗	if (strict)
2552		✗	return AVERROR_INVALIDDATA;
2553			}
2554		✗	break;
2555			}
2556			}
2557
2558		447	return 0;
2559			}
2560
2561		1	static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2562			{
2563			const AVCodecTag *codec_tags;
2564
2565		2	codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2566	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2567
2568			/* Normalize noncompliant private data that starts with the fourcc
2569			* by expanding/shifting the data by 4 bytes and storing the data
2570			* size at the start. */
2571	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2572		✗	int ret = av_buffer_realloc(&track->codec_priv.buf,
2573		✗	track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2574		✗	if (ret < 0)
2575		✗	return ret;
2576
2577		✗	track->codec_priv.data = track->codec_priv.buf->data;
2578		✗	memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2579		✗	track->codec_priv.size += 4;
2580		✗	AV_WB32(track->codec_priv.data, track->codec_priv.size);
2581			}
2582
2583		1	*fourcc = AV_RL32(track->codec_priv.data + 4);
2584		1	*codec_id = ff_codec_get_id(codec_tags, *fourcc);
2585
2586		1	return 0;
2587			}
2588
2589			/* An enum with potential return values of the functions for parsing a track.
2590			* Apart from that all these functions can also indicate ordinary errors via
2591			* negative return values. */
2592			enum {
2593			SKIP_TRACK = 1,
2594			};
2595
2596			#define AAC_MAX_EXTRADATA_SIZE 5
2597			#define TTA_EXTRADATA_SIZE 22
2598			#define WAVPACK_EXTRADATA_SIZE 2
2599			/* Performs the codec-specific part of parsing an audio track. */
2600		84	static int mka_parse_audio_codec(MatroskaTrack *track, AVCodecParameters *par,
2601			const MatroskaDemuxContext *matroska,
2602			AVFormatContext *s, int *extradata_offset)
2603			{
2604			uint8_t extradata[FFMAX3(AAC_MAX_EXTRADATA_SIZE,
2605			TTA_EXTRADATA_SIZE,
2606			WAVPACK_EXTRADATA_SIZE)];
2607		84	int extradata_size = 0; // > 0 means that the extradata buffer is used
2608			int ret;
2609
2610	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 83 times.	84	if (!strcmp(track->codec_id, "A_MS/ACM") &&
2611	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 14) {
2612			FFIOContext b;
2613		1	ffio_init_read_context(&b, track->codec_priv.data,
2614			track->codec_priv.size);
2615		1	ret = ff_get_wav_header(s, &b.pub, par,
2616			track->codec_priv.size, 0);
2617	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2618		✗	return ret;
2619		1	*extradata_offset = FFMIN(track->codec_priv.size, 18);
2620		1	return 0;
2621	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	} else if (!strcmp(track->codec_id, "A_QUICKTIME") &&
2622			/* Normally 36, but allow noncompliant private data */
2623		✗	track->codec_priv.size >= 32) {
2624			enum AVCodecID codec_id;
2625			uint32_t fourcc;
2626			uint16_t sample_size;
2627
2628		✗	ret = get_qt_codec(track, &fourcc, &codec_id);
2629		✗	if (ret < 0)
2630		✗	return ret;
2631		✗	sample_size = AV_RB16(track->codec_priv.data + 26);
2632		✗	if (fourcc == 0) {
2633		✗	if (sample_size == 8) {
2634		✗	fourcc = MKTAG('r','a','w',' ');
2635		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2636		✗	} else if (sample_size == 16) {
2637		✗	fourcc = MKTAG('t','w','o','s');
2638		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2639			}
2640			}
2641		✗	if ((fourcc == MKTAG('t','w','o','s') ||
2642		✗	fourcc == MKTAG('s','o','w','t')) && sample_size == 8)
2643		✗	codec_id = AV_CODEC_ID_PCM_S8;
2644		✗	par->codec_id = codec_id;
2645		✗	par->codec_tag = fourcc;
2646		✗	return 0;
2647			}
2648
2649	9/12 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 7 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 12 times. ✓ Branch 4 taken 2 times. ✓ Branch 5 taken 3 times. ✗ Branch 6 not taken. ✗ Branch 7 not taken. ✓ Branch 8 taken 1 times. ✓ Branch 9 taken 9 times. ✓ Branch 10 taken 2 times. ✓ Branch 11 taken 42 times.	83	switch (par->codec_id) {
2650		5	case AV_CODEC_ID_PCM_S16BE:
2651	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 2 times.	5	switch (track->audio.bitdepth) {
2652		✗	case 8:
2653		✗	par->codec_id = AV_CODEC_ID_PCM_U8;
2654		✗	break;
2655		1	case 24:
2656		1	par->codec_id = AV_CODEC_ID_PCM_S24BE;
2657		1	break;
2658		2	case 32:
2659		2	par->codec_id = AV_CODEC_ID_PCM_S32BE;
2660		2	break;
2661			}
2662		5	break;
2663		7	case AV_CODEC_ID_PCM_S16LE:
2664	4/4 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 3 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 1 times.	7	switch (track->audio.bitdepth) {
2665		1	case 8:
2666		1	par->codec_id = AV_CODEC_ID_PCM_U8;
2667		1	break;
2668		3	case 24:
2669		3	par->codec_id = AV_CODEC_ID_PCM_S24LE;
2670		3	break;
2671		2	case 32:
2672		2	par->codec_id = AV_CODEC_ID_PCM_S32LE;
2673		2	break;
2674			}
2675		7	break;
2676		✗	case AV_CODEC_ID_PCM_F32LE:
2677		✗	if (track->audio.bitdepth == 64)
2678		✗	par->codec_id = AV_CODEC_ID_PCM_F64LE;
2679		✗	break;
2680		12	case AV_CODEC_ID_AAC:
2681	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!track->codec_priv.size) {
2682		✗	int profile = matroska_aac_profile(track->codec_id);
2683		✗	int sri = matroska_aac_sri(track->audio.samplerate);
2684
2685		✗	extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2686		✗	extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2687		✗	if (strstr(track->codec_id, "SBR")) {
2688		✗	sri = matroska_aac_sri(track->audio.out_samplerate);
2689		✗	extradata[2] = 0x56;
2690		✗	extradata[3] = 0xE5;
2691		✗	extradata[4] = 0x80 | (sri << 3);
2692		✗	extradata_size = 5;
2693			} else
2694		✗	extradata_size = 2;
2695			}
2696		12	break;
2697		2	case AV_CODEC_ID_ALAC:
2698	2/4 ✓ Branch 0 taken 2 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	2	if (track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2699			/* Only ALAC's magic cookie is stored in Matroska's track headers.
2700			* Create the "atom size", "tag", and "tag version" fields the
2701			* decoder expects manually. */
2702		2	ret = ff_alloc_extradata(par, 12 + track->codec_priv.size);
2703	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (ret < 0)
2704		✗	return ret;
2705		2	AV_WB32(par->extradata, par->extradata_size);
2706		2	AV_WB32(&par->extradata[4], MKBETAG('a', 'l', 'a', 'c'));
2707		2	AV_WB32(&par->extradata[8], 0);
2708		2	memcpy(&par->extradata[12], track->codec_priv.data,
2709		2	track->codec_priv.size);
2710			}
2711		2	break;
2712		3	case AV_CODEC_ID_TTA:
2713			{
2714			uint8_t *ptr;
2715	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (track->audio.channels > UINT16_MAX ||
2716	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	track->audio.bitdepth > UINT16_MAX) {
2717		✗	av_log(matroska->ctx, AV_LOG_WARNING,
2718			"Too large audio channel number %"PRIu64
2719			" or bitdepth %"PRIu64". Skipping track.\n",
2720			track->audio.channels, track->audio.bitdepth);
2721		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2722		✗	return AVERROR_INVALIDDATA;
2723			else
2724		✗	return SKIP_TRACK;
2725			}
2726	2/4 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 3 times.	3	if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2727		✗	return AVERROR_INVALIDDATA;
2728		3	extradata_size = TTA_EXTRADATA_SIZE;
2729		3	ptr = extradata;
2730		3	bytestream_put_be32(&ptr, AV_RB32("TTA1"));
2731		3	bytestream_put_le16(&ptr, 1);
2732		3	bytestream_put_le16(&ptr, track->audio.channels);
2733		3	bytestream_put_le16(&ptr, track->audio.bitdepth);
2734		3	bytestream_put_le32(&ptr, track->audio.out_samplerate);
2735		3	bytestream_put_le32(&ptr, av_rescale(matroska->duration * matroska->time_scale,
2736		3	track->audio.out_samplerate,
2737			AV_TIME_BASE * 1000));
2738		3	break;
2739			}
2740		✗	case AV_CODEC_ID_RA_144:
2741		✗	track->audio.out_samplerate = 8000;
2742		✗	track->audio.channels = 1;
2743		✗	break;
2744		✗	case AV_CODEC_ID_RA_288:
2745			case AV_CODEC_ID_COOK:
2746			case AV_CODEC_ID_ATRAC3:
2747			case AV_CODEC_ID_SIPR:
2748			{
2749		✗	const uint8_t *ptr = track->codec_priv.data;
2750			int flavor;
2751
2752		✗	if (!track->codec_priv.size)
2753		✗	break;
2754
2755		✗	if (track->codec_priv.size < 46)
2756		✗	return AVERROR_INVALIDDATA;
2757		✗	ptr += 22;
2758		✗	flavor = bytestream_get_be16(&ptr);
2759		✗	track->audio.coded_framesize = bytestream_get_be32(&ptr);
2760		✗	ptr += 12;
2761		✗	track->audio.sub_packet_h = bytestream_get_be16(&ptr);
2762		✗	track->audio.frame_size = bytestream_get_be16(&ptr);
2763		✗	track->audio.sub_packet_size = bytestream_get_be16(&ptr);
2764		✗	if (track->audio.coded_framesize <= 0 ||
2765		✗	track->audio.sub_packet_h <= 0 ||
2766		✗	track->audio.frame_size <= 0)
2767		✗	return AVERROR_INVALIDDATA;
2768
2769		✗	if (par->codec_id == AV_CODEC_ID_RA_288) {
2770		✗	if (track->audio.sub_packet_h & 1 || 2 * track->audio.frame_size
2771		✗	!= (int64_t)track->audio.sub_packet_h * track->audio.coded_framesize)
2772		✗	return AVERROR_INVALIDDATA;
2773		✗	par->block_align = track->audio.coded_framesize;
2774		✗	track->codec_priv.size = 0;
2775			} else {
2776		✗	if (par->codec_id == AV_CODEC_ID_SIPR) {
2777			static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2778		✗	if (flavor > 3)
2779		✗	return AVERROR_INVALIDDATA;
2780		✗	track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2781		✗	par->bit_rate = sipr_bit_rate[flavor];
2782		✗	} else if (track->audio.sub_packet_size <= 0 ||
2783		✗	track->audio.frame_size % track->audio.sub_packet_size)
2784		✗	return AVERROR_INVALIDDATA;
2785		✗	par->block_align = track->audio.sub_packet_size;
2786		✗	*extradata_offset = 78;
2787			}
2788		✗	if (par->block_align <= 0 ||
2789		✗	track->audio.sub_packet_h * (unsigned)track->audio.frame_size > INT_MAX ||
2790		✗	track->audio.frame_size * track->audio.sub_packet_h < par->block_align)
2791		✗	return AVERROR_INVALIDDATA;
2792		✗	track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2793		✗	track->audio.frame_size);
2794		✗	if (!track->audio.buf)
2795		✗	return AVERROR(ENOMEM);
2796		✗	break;
2797			}
2798		1	case AV_CODEC_ID_ATRAC1:
2799			/* ATRAC1 uses a constant frame size.
2800			* Typical ATRAC1 streams are either mono or stereo.
2801			* At most, ATRAC1 was used to store 8 channels of audio. */
2802	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (track->audio.channels > 8)
2803		✗	return AVERROR_INVALIDDATA;
2804		1	par->block_align = track->audio.channels * 212;
2805		1	break;
2806		9	case AV_CODEC_ID_FLAC:
2807	1/2 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken.	9	if (track->codec_priv.size) {
2808		9	ret = matroska_parse_flac(s, track, extradata_offset);
2809	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 9 times.	9	if (ret < 0)
2810		✗	return ret;
2811			}
2812		9	break;
2813		2	case AV_CODEC_ID_WAVPACK:
2814	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 1 times.	2	if (track->codec_priv.size < 2) {
2815		1	av_log(matroska->ctx, AV_LOG_INFO, "Assuming WavPack version 4.10 "
2816			"in absence of valid CodecPrivate.\n");
2817		1	extradata_size = WAVPACK_EXTRADATA_SIZE;
2818		1	AV_WL16(extradata, 0x410);
2819			}
2820		2	break;
2821			}
2822
2823	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 79 times.	83	if (extradata_size > 0) {
2824		4	ret = ff_alloc_extradata(par, extradata_size);
2825	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (ret < 0)
2826		✗	return ret;
2827		4	memcpy(par->extradata, extradata, extradata_size);
2828			}
2829
2830		83	return 0;
2831			}
2832
2833			/* Performs the generic part of parsing an audio track. */
2834		84	static int mka_parse_audio(MatroskaTrack *track, AVStream *st,
2835			AVCodecParameters *par,
2836			const MatroskaDemuxContext *matroska,
2837			AVFormatContext *s, int *extradata_offset)
2838			{
2839		84	FFStream *const sti = ffstream(st);
2840			int ret;
2841
2842		84	ret = mka_parse_audio_codec(track, par, matroska,
2843			s, extradata_offset);
2844	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret)
2845		✗	return ret;
2846
2847		84	par->codec_type = AVMEDIA_TYPE_AUDIO;
2848		84	par->sample_rate = track->audio.out_samplerate;
2849			// channel layout may be already set by codec private checks above
2850	2/2 ✓ Branch 1 taken 75 times. ✓ Branch 2 taken 9 times.	84	if (!av_channel_layout_check(&par->ch_layout)) {
2851	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 75 times.	75	if (track->audio.channels > INT32_MAX)
2852		✗	return AVERROR_PATCHWELCOME;
2853		75	par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
2854		75	par->ch_layout.nb_channels = track->audio.channels;
2855			}
2856	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!par->bits_per_coded_sample)
2857		83	par->bits_per_coded_sample = track->audio.bitdepth;
2858	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (par->codec_id == AV_CODEC_ID_MP3 ||
2859	1/2 ✓ Branch 0 taken 83 times. ✗ Branch 1 not taken.	83	par->codec_id == AV_CODEC_ID_MLP ||
2860	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	par->codec_id == AV_CODEC_ID_TRUEHD)
2861		1	sti->need_parsing = AVSTREAM_PARSE_FULL;
2862	2/2 ✓ Branch 0 taken 71 times. ✓ Branch 1 taken 12 times.	83	else if (par->codec_id != AV_CODEC_ID_AAC)
2863		71	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
2864	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 73 times.	84	if (track->codec_delay > 0) {
2865		11	par->initial_padding = av_rescale_q(track->codec_delay,
2866		11	(AVRational){1, 1000000000},
2867		22	(AVRational){1, par->codec_id == AV_CODEC_ID_OPUS ?
2868	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 6 times.	11	48000 : par->sample_rate});
2869		11	sti->skip_samples = par->initial_padding;
2870			}
2871	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 77 times.	84	if (track->seek_preroll > 0) {
2872		7	par->seek_preroll = av_rescale_q(track->seek_preroll,
2873		7	(AVRational){1, 1000000000},
2874		7	(AVRational){1, par->sample_rate});
2875			}
2876
2877		84	return 0;
2878			}
2879
2880			/* Performs the codec-specific part of parsing a video track. */
2881		339	static int mkv_parse_video_codec(MatroskaTrack *track, AVCodecParameters *par,
2882			const MatroskaDemuxContext *matroska,
2883			int *extradata_offset)
2884			{
2885	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 334 times.	339	if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2886	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	track->codec_priv.size >= 40) {
2887		5	uint32_t size = AV_RL32A(track->codec_priv.data);
2888			// VFW extradata is padded to an even length, yet
2889			// the size field contains the real length.
2890	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	5	if (size & 1 && size == track->codec_priv.size - 1)
2891		✗	--track->codec_priv.size;
2892		5	track->ms_compat = 1;
2893		5	par->bits_per_coded_sample = AV_RL16(track->codec_priv.data + 14);
2894		5	par->codec_tag = AV_RL32(track->codec_priv.data + 16);
2895		5	par->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2896			par->codec_tag);
2897	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times.	5	if (!par->codec_id)
2898		✗	par->codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2899			par->codec_tag);
2900		5	*extradata_offset = 40;
2901		5	return 0;
2902	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 333 times.	334	} else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2903	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 21) {
2904			enum AVCodecID codec_id;
2905			uint32_t fourcc;
2906		1	int ret = get_qt_codec(track, &fourcc, &codec_id);
2907	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2908		✗	return ret;
2909	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	1	if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2910		✗	fourcc = MKTAG('S','V','Q','3');
2911		✗	codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2912			}
2913		1	par->codec_id = codec_id;
2914	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (codec_id == AV_CODEC_ID_NONE)
2915		✗	av_log(matroska->ctx, AV_LOG_ERROR,
2916		✗	"mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2917	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.size >= 86) {
2918			FFIOContext b;
2919		1	unsigned bit_depth = AV_RB16(track->codec_priv.data + 82);
2920		1	ffio_init_read_context(&b, track->codec_priv.data,
2921			track->codec_priv.size);
2922	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (ff_get_qtpalette(codec_id, &b.pub, track->palette)) {
2923		✗	bit_depth &= 0x1F;
2924		✗	track->has_palette = 1;
2925			}
2926		1	par->bits_per_coded_sample = bit_depth;
2927			}
2928		1	par->codec_tag = fourcc;
2929		1	return 0;
2930			}
2931
2932	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times. ✓ Branch 2 taken 249 times. ✓ Branch 3 taken 79 times.	333	switch (par->codec_id) {
2933		✗	case AV_CODEC_ID_RV10:
2934			case AV_CODEC_ID_RV20:
2935			case AV_CODEC_ID_RV30:
2936			case AV_CODEC_ID_RV40:
2937		✗	*extradata_offset = 26;
2938		✗	break;
2939		5	case AV_CODEC_ID_PRORES:
2940	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	if (track->codec_priv.size == 4)
2941		5	par->codec_tag = AV_RL32(track->codec_priv.data);
2942		5	break;
2943		249	case AV_CODEC_ID_VP9:
2944			/* we don't need any value stored in CodecPrivate.
2945			* make sure that it's not exported as extradata. */
2946		249	track->codec_priv.size = 0;
2947		249	break;
2948			}
2949
2950		333	return 0;
2951			}
2952
2953			/* Performs the generic part of parsing a video track. */
2954		339	static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
2955			AVCodecParameters *par,
2956			const MatroskaDemuxContext *matroska,
2957			int *extradata_offset)
2958			{
2959		339	FFStream *const sti = ffstream(st);
2960			MatroskaTrackPlane *planes;
2961		339	int display_width_mul = 1;
2962		339	int display_height_mul = 1;
2963			int ret;
2964
2965	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 335 times.	339	if (track->video.color_space.size == 4)
2966		4	par->codec_tag = AV_RL32(track->video.color_space.data);
2967
2968		339	ret = mkv_parse_video_codec(track, par, matroska,
2969			extradata_offset);
2970	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
2971		✗	return ret;
2972
2973		339	par->codec_type = AVMEDIA_TYPE_VIDEO;
2974		339	par->width = track->video.pixel_width;
2975		339	par->height = track->video.pixel_height;
2976
2977	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 332 times.	339	if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2978		7	par->field_order = mkv_field_order(matroska, track->video.field_order);
2979	2/2 ✓ Branch 0 taken 21 times. ✓ Branch 1 taken 311 times.	332	else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2980		21	par->field_order = AV_FIELD_PROGRESSIVE;
2981
2982	4/4 ✓ Branch 0 taken 111 times. ✓ Branch 1 taken 228 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 99 times.	339	if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2983		12	mkv_stereo_mode_display_mul(track->video.stereo_mode,
2984			&display_width_mul, &display_height_mul);
2985
2986	2/2 ✓ Branch 0 taken 312 times. ✓ Branch 1 taken 27 times.	339	if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2987	2/4 ✓ Branch 0 taken 312 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 312 times. ✗ Branch 3 not taken.	312	if (track->video.display_width && track->video.display_height &&
2988	2/4 ✓ Branch 0 taken 312 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 312 times. ✗ Branch 3 not taken.	312	track->video.display_width != -1 && track->video.display_height != -1 &&
2989	1/2 ✓ Branch 0 taken 312 times. ✗ Branch 1 not taken.	312	track->video.cropped_height < INT64_MAX / track->video.display_width / display_width_mul &&
2990	1/2 ✓ Branch 0 taken 312 times. ✗ Branch 1 not taken.	312	track->video.cropped_width < INT64_MAX / track->video.display_height / display_height_mul)
2991		312	av_reduce(&st->sample_aspect_ratio.num,
2992			&st->sample_aspect_ratio.den,
2993		312	track->video.cropped_height * track->video.display_width * display_width_mul,
2994		312	track->video.cropped_width * track->video.display_height * display_height_mul,
2995			INT_MAX);
2996			}
2997	2/2 ✓ Branch 0 taken 335 times. ✓ Branch 1 taken 4 times.	339	if (track->video.cropped_width != track->video.pixel_width ||
2998	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 335 times.	335	track->video.cropped_height != track->video.pixel_height) {
2999			uint8_t *cropping;
3000		4	AVPacketSideData *sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
3001		4	&st->codecpar->nb_coded_side_data,
3002			AV_PKT_DATA_FRAME_CROPPING,
3003			sizeof(uint32_t) * 4, 0);
3004	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (!sd)
3005		✗	return AVERROR(ENOMEM);
3006
3007		4	cropping = sd->data;
3008		4	bytestream_put_le32(&cropping, track->video.pixel_cropt);
3009		4	bytestream_put_le32(&cropping, track->video.pixel_cropb);
3010		4	bytestream_put_le32(&cropping, track->video.pixel_cropl);
3011		4	bytestream_put_le32(&cropping, track->video.pixel_cropr);
3012			}
3013	2/2 ✓ Branch 0 taken 326 times. ✓ Branch 1 taken 13 times.	339	if (par->codec_id != AV_CODEC_ID_HEVC)
3014		326	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
3015
3016	2/2 ✓ Branch 0 taken 297 times. ✓ Branch 1 taken 42 times.	339	if (track->default_duration) {
3017	1/2 ✓ Branch 0 taken 297 times. ✗ Branch 1 not taken.	297	int div = track->default_duration <= INT64_MAX ? 1 : 2;
3018		297	av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3019		297	1000000000 / div, track->default_duration / div, 30000);
3020			#if FF_API_R_FRAME_RATE
3021	2/2 ✓ Branch 0 taken 295 times. ✓ Branch 1 taken 2 times.	297	if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
3022	2/2 ✓ Branch 0 taken 274 times. ✓ Branch 1 taken 21 times.	295	&& st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
3023		274	st->r_frame_rate = st->avg_frame_rate;
3024			#endif
3025			}
3026
3027			/* export stereo mode flag as metadata tag */
3028	4/4 ✓ Branch 0 taken 111 times. ✓ Branch 1 taken 228 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 99 times.	339	if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
3029		12	av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
3030
3031			/* export alpha mode flag as metadata tag */
3032	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 336 times.	339	if (track->video.alpha_mode)
3033		3	av_dict_set_int(&st->metadata, "alpha_mode", 1, 0);
3034
3035			/* if we have virtual track, mark the real tracks */
3036		339	planes = track->operation.combine_planes.elem;
3037	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	for (int j = 0; j < track->operation.combine_planes.nb_elem; j++) {
3038		✗	MatroskaTrack *tracks = matroska->tracks.elem;
3039			char buf[32];
3040		✗	if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
3041		✗	continue;
3042		✗	snprintf(buf, sizeof(buf), "%s_%d",
3043		✗	matroska_video_stereo_plane[planes[j].type], st->index);
3044		✗	for (int k = 0; k < matroska->tracks.nb_elem; k++)
3045		✗	if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
3046		✗	av_dict_set(&tracks[k].stream->metadata,
3047			"stereo_mode", buf, 0);
3048		✗	break;
3049			}
3050			}
3051			// add stream level stereo3d side data if it is a supported format
3052	2/2 ✓ Branch 0 taken 240 times. ✓ Branch 1 taken 99 times.	339	if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
3053	2/2 ✓ Branch 0 taken 238 times. ✓ Branch 1 taken 2 times.	240	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_CYAN_RED &&
3054	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 2 times.	238	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_GREEN_MAG) {
3055		236	ret = mkv_stereo3d_conv(st, track->video.stereo_mode);
3056	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (ret < 0)
3057		✗	return ret;
3058			}
3059
3060		339	ret = mkv_parse_video_color(st, track);
3061	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
3062		✗	return ret;
3063		339	ret = mkv_parse_video_projection(st, track, matroska->ctx);
3064	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
3065		✗	return ret;
3066
3067		339	return 0;
3068			}
3069
3070			/* Performs the codec-specific part of parsing a subtitle track. */
3071		24	static int mkv_parse_subtitle_codec(MatroskaTrack *track, AVStream *st,
3072			AVCodecParameters *par,
3073			const MatroskaDemuxContext *matroska)
3074			{
3075	2/3 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 16 times.	24	switch (par->codec_id) {
3076		✗	case AV_CODEC_ID_ARIB_CAPTION:
3077		✗	if (track->codec_priv.size == 3) {
3078		✗	int component_tag = track->codec_priv.data[0];
3079		✗	int data_component_id = AV_RB16(track->codec_priv.data + 1);
3080
3081		✗	switch (data_component_id) {
3082		✗	case 0x0008:
3083			// [0x30..0x37] are component tags utilized for
3084			// non-mobile captioning service ("profile A").
3085		✗	if (component_tag >= 0x30 && component_tag <= 0x37) {
3086		✗	par->profile = AV_PROFILE_ARIB_PROFILE_A;
3087			}
3088		✗	break;
3089		✗	case 0x0012:
3090			// component tag 0x87 signifies a mobile/partial reception
3091			// (1seg) captioning service ("profile C").
3092		✗	if (component_tag == 0x87) {
3093		✗	par->profile = AV_PROFILE_ARIB_PROFILE_C;
3094			}
3095		✗	break;
3096		✗	default:
3097		✗	break;
3098			}
3099
3100		✗	if (par->profile == AV_PROFILE_UNKNOWN)
3101		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3102			"Unknown ARIB caption profile utilized: %02x / %04x\n",
3103			component_tag, data_component_id);
3104
3105		✗	track->codec_priv.size = 0;
3106			}
3107		✗	break;
3108		8	case AV_CODEC_ID_WEBVTT:
3109	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 6 times.	8	if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
3110		2	st->disposition |= AV_DISPOSITION_CAPTIONS;
3111	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times.	6	} else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
3112		2	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3113	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	} else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
3114		2	st->disposition |= AV_DISPOSITION_METADATA;
3115			}
3116		8	break;
3117			}
3118
3119		24	return 0;
3120			}
3121
3122		372	static int matroska_parse_tracks(AVFormatContext *s)
3123			{
3124		372	MatroskaDemuxContext *matroska = s->priv_data;
3125		372	MatroskaTrack *tracks = matroska->tracks.elem;
3126			int i, j, ret;
3127
3128	2/2 ✓ Branch 0 taken 447 times. ✓ Branch 1 taken 372 times.	819	for (i = 0; i < matroska->tracks.nb_elem; i++) {
3129		447	MatroskaTrack *track = &tracks[i];
3130		447	enum AVCodecID codec_id = AV_CODEC_ID_NONE;
3131			AVCodecParameters *par;
3132			MatroskaTrackType type;
3133		447	int extradata_offset = 0;
3134			AVStream *st;
3135		447	char* key_id_base64 = NULL;
3136
3137			/* Apply some sanity checks. */
3138	2/2 ✓ Branch 0 taken 108 times. ✓ Branch 1 taken 339 times.	447	if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
3139	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 84 times.	108	track->type != MATROSKA_TRACK_TYPE_AUDIO &&
3140	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 20 times.	24	track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
3141	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	track->type != MATROSKA_TRACK_TYPE_METADATA) {
3142		✗	av_log(matroska->ctx, AV_LOG_INFO,
3143			"Unknown or unsupported track type %"PRIu64"\n",
3144			track->type);
3145		✗	continue;
3146			}
3147	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (!track->codec_id)
3148		✗	continue;
3149
3150	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 363 times. ✓ Branch 2 taken 84 times. ✗ Branch 3 not taken.	447	if ( track->type == MATROSKA_TRACK_TYPE_AUDIO && track->codec_id[0] != 'A'
3151	3/4 ✓ Branch 0 taken 339 times. ✓ Branch 1 taken 108 times. ✓ Branch 2 taken 339 times. ✗ Branch 3 not taken.	447	|| track->type == MATROSKA_TRACK_TYPE_VIDEO && track->codec_id[0] != 'V'
3152	5/6 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 427 times. ✓ Branch 2 taken 16 times. ✓ Branch 3 taken 4 times. ✓ Branch 4 taken 16 times. ✗ Branch 5 not taken.	447	|| track->type == MATROSKA_TRACK_TYPE_SUBTITLE && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
3153	3/6 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 443 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 4 times. ✗ Branch 4 not taken. ✗ Branch 5 not taken.	447	|| track->type == MATROSKA_TRACK_TYPE_METADATA && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
3154			) {
3155		✗	av_log(matroska->ctx, AV_LOG_INFO, "Inconsistent track type\n");
3156		✗	continue;
3157			}
3158
3159	2/4 ✓ Branch 0 taken 447 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 447 times. ✗ Branch 3 not taken.	447	if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
3160	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	isnan(track->audio.samplerate)) {
3161		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3162			"Invalid sample rate %f, defaulting to 8000 instead.\n",
3163			track->audio.samplerate);
3164		✗	track->audio.samplerate = 8000;
3165			}
3166
3167	2/2 ✓ Branch 0 taken 339 times. ✓ Branch 1 taken 108 times.	447	if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
3168	4/4 ✓ Branch 0 taken 246 times. ✓ Branch 1 taken 93 times. ✓ Branch 2 taken 204 times. ✓ Branch 3 taken 42 times.	339	if (!track->default_duration && track->video.frame_rate > 0) {
3169		204	double default_duration = 1000000000 / track->video.frame_rate;
3170	2/4 ✓ Branch 0 taken 204 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 204 times.	204	if (default_duration > UINT64_MAX || default_duration < 0) {
3171		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3172			"Invalid frame rate %e. Cannot calculate default duration.\n",
3173			track->video.frame_rate);
3174			} else {
3175		204	track->default_duration = default_duration;
3176			}
3177			}
3178	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	339	int has_dimensions = track->video.pixel_width || track->video.pixel_height;
3179	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if ((matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
3180		✗	(!track->video.pixel_width || !track->video.pixel_height)) ||
3181	1/2 ✓ Branch 0 taken 339 times. ✗ Branch 1 not taken.	339	(track->video.pixel_cropl >= INT_MAX - track->video.pixel_cropr ||
3182	1/2 ✓ Branch 0 taken 339 times. ✗ Branch 1 not taken.	339	track->video.pixel_cropt >= INT_MAX - track->video.pixel_cropb ||
3183	1/2 ✓ Branch 0 taken 339 times. ✗ Branch 1 not taken.	339	(track->video.pixel_cropl + track->video.pixel_cropr) >= track->video.pixel_width + !has_dimensions ||
3184	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	(track->video.pixel_cropt + track->video.pixel_cropb) >= track->video.pixel_height + !has_dimensions)) {
3185		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3186			"Invalid coded dimensions %"PRId64"x%"PRId64" [%"PRId64", %"PRId64", %"PRId64", %"PRId64"].\n",
3187			track->video.pixel_width, track->video.pixel_height,
3188			track->video.pixel_cropl, track->video.pixel_cropr,
3189			track->video.pixel_cropt, track->video.pixel_cropb);
3190		✗	return AVERROR_INVALIDDATA;
3191			}
3192		339	track->video.cropped_width = track->video.pixel_width -
3193		339	track->video.pixel_cropl - track->video.pixel_cropr;
3194		339	track->video.cropped_height = track->video.pixel_height -
3195		339	track->video.pixel_cropt - track->video.pixel_cropb;
3196	2/2 ✓ Branch 0 taken 297 times. ✓ Branch 1 taken 42 times.	339	if (track->video.display_unit == MATROSKA_VIDEO_DISPLAYUNIT_PIXELS) {
3197	2/2 ✓ Branch 0 taken 264 times. ✓ Branch 1 taken 33 times.	297	if (track->video.display_width == -1)
3198		264	track->video.display_width = track->video.cropped_width;
3199	2/2 ✓ Branch 0 taken 264 times. ✓ Branch 1 taken 33 times.	297	if (track->video.display_height == -1)
3200		264	track->video.display_height = track->video.cropped_height;
3201			}
3202	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 24 times.	108	} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
3203	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!track->audio.out_samplerate)
3204		83	track->audio.out_samplerate = track->audio.samplerate;
3205			}
3206		447	ret = matroska_parse_content_encodings(track->encodings.elem,
3207		447	track->encodings.nb_elem,
3208		447	track, &key_id_base64, matroska->ctx);
3209	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (ret < 0)
3210		✗	return ret;
3211
3212	2/2 ✓ Branch 0 taken 26799 times. ✓ Branch 1 taken 7 times.	26806	for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
3213	2/2 ✓ Branch 1 taken 440 times. ✓ Branch 2 taken 26359 times.	26799	if (av_strstart(track->codec_id, ff_mkv_codec_tags[j].str, NULL)) {
3214		440	codec_id = ff_mkv_codec_tags[j].id;
3215		440	break;
3216			}
3217			}
3218
3219		447	st = track->stream = avformat_new_stream(s, NULL);
3220	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (!st) {
3221		✗	av_free(key_id_base64);
3222		✗	return AVERROR(ENOMEM);
3223			}
3224		447	par = st->codecpar;
3225
3226		447	par->codec_id = codec_id;
3227
3228	2/2 ✓ Branch 0 taken 359 times. ✓ Branch 1 taken 88 times.	447	if (track->flag_default)
3229		359	st->disposition |= AV_DISPOSITION_DEFAULT;
3230	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 443 times.	447	if (track->flag_forced)
3231		4	st->disposition |= AV_DISPOSITION_FORCED;
3232	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 445 times.	447	if (track->flag_comment)
3233		2	st->disposition |= AV_DISPOSITION_COMMENT;
3234	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 439 times.	447	if (track->flag_hearingimpaired)
3235		8	st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
3236	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 445 times.	447	if (track->flag_visualimpaired)
3237		2	st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
3238	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 443 times.	447	if (track->flag_original.count > 0)
3239		4	st->disposition |= track->flag_original.el.u ? AV_DISPOSITION_ORIGINAL
3240	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	: AV_DISPOSITION_DUB;
3241
3242	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (key_id_base64) {
3243			/* export encryption key id as base64 metadata tag */
3244		✗	av_dict_set(&st->metadata, "enc_key_id", key_id_base64,
3245			AV_DICT_DONT_STRDUP_VAL);
3246			}
3247
3248	2/2 ✓ Branch 0 taken 323 times. ✓ Branch 1 taken 124 times.	447	if (strcmp(track->language, "und"))
3249		323	av_dict_set(&st->metadata, "language", track->language, 0);
3250		447	av_dict_set(&st->metadata, "title", track->name, 0);
3251
3252	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (track->time_scale < 0.01) {
3253		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3254			"Track TimestampScale too small %f, assuming 1.0.\n",
3255			track->time_scale);
3256		✗	track->time_scale = 1.0;
3257			}
3258
3259	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (matroska->time_scale * track->time_scale > UINT_MAX)
3260		✗	return AVERROR_INVALIDDATA;
3261
3262		447	avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
3263			1000 * 1000 * 1000); /* 64 bit pts in ns */
3264
3265			/* convert the delay from ns to the track timebase */
3266		447	track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
3267		447	(AVRational){ 1, 1000000000 },
3268			st->time_base);
3269
3270		447	type = track->type;
3271	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 439 times.	447	if (par->codec_id == AV_CODEC_ID_WEBVTT)
3272		8	type = MATROSKA_TRACK_TYPE_SUBTITLE;
3273	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 339 times. ✓ Branch 2 taken 24 times. ✗ Branch 3 not taken.	447	switch (type) {
3274		84	case MATROSKA_TRACK_TYPE_AUDIO:
3275		84	ret = mka_parse_audio(track, st, par, matroska,
3276			s, &extradata_offset);
3277	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret < 0)
3278		✗	return ret;
3279	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret == SKIP_TRACK)
3280		✗	continue;
3281		84	break;
3282		339	case MATROSKA_TRACK_TYPE_VIDEO:
3283		339	ret = mkv_parse_video(track, st, par, matroska, &extradata_offset);
3284	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
3285		✗	return ret;
3286		339	break;
3287		24	case MATROSKA_TRACK_TYPE_SUBTITLE:
3288		24	ret = mkv_parse_subtitle_codec(track, st, par, matroska);
3289	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (ret < 0)
3290		✗	return ret;
3291		24	par->codec_type = AVMEDIA_TYPE_SUBTITLE;
3292
3293	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (track->flag_textdescriptions)
3294		✗	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3295		24	break;
3296			}
3297
3298	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (par->codec_id == AV_CODEC_ID_NONE)
3299		✗	av_log(matroska->ctx, AV_LOG_INFO,
3300			"Unknown/unsupported AVCodecID %s.\n", track->codec_id);
3301
3302	4/4 ✓ Branch 0 taken 440 times. ✓ Branch 1 taken 7 times. ✓ Branch 2 taken 138 times. ✓ Branch 3 taken 302 times.	447	if (!par->extradata && track->codec_priv.size > extradata_offset) {
3303		138	const uint8_t *src = track->codec_priv.data + extradata_offset;
3304		138	unsigned extra_size = track->codec_priv.size - extradata_offset;
3305		138	ret = ff_alloc_extradata(par, extra_size);
3306	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 138 times.	138	if (ret < 0)
3307		✗	return ret;
3308		138	memcpy(par->extradata, src, extra_size);
3309			}
3310
3311		447	ret = mkv_parse_block_addition_mappings(s, st, track);
3312	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (ret < 0)
3313		✗	return ret;
3314			}
3315
3316		372	return 0;
3317			}
3318
3319		372	static int matroska_read_header(AVFormatContext *s)
3320			{
3321		372	FFFormatContext *const si = ffformatcontext(s);
3322		372	MatroskaDemuxContext *matroska = s->priv_data;
3323		372	EbmlList *attachments_list = &matroska->attachments;
3324		372	EbmlList *chapters_list = &matroska->chapters;
3325			MatroskaAttachment *attachments;
3326			MatroskaChapter *chapters;
3327		372	uint64_t max_start = 0;
3328			int64_t pos;
3329		372	Ebml ebml = { 0 };
3330			int i, j, res;
3331
3332		372	matroska->ctx = s;
3333		372	matroska->cues_parsing_deferred = 1;
3334
3335			/* First read the EBML header. */
3336	2/4 ✓ Branch 1 taken 372 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 372 times.	372	if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
3337		✗	av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
3338		✗	ebml_free(ebml_syntax, &ebml);
3339		✗	return AVERROR_INVALIDDATA;
3340			}
3341	1/2 ✓ Branch 0 taken 372 times. ✗ Branch 1 not taken.	372	if (ebml.version > EBML_VERSION ||
3342	1/2 ✓ Branch 0 taken 372 times. ✗ Branch 1 not taken.	372	ebml.max_size > sizeof(uint64_t) ||
3343	1/2 ✓ Branch 0 taken 372 times. ✗ Branch 1 not taken.	372	ebml.id_length > sizeof(uint32_t) ||
3344	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	ebml.doctype_version > 3) {
3345		✗	avpriv_report_missing_feature(matroska->ctx,
3346			"EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
3347			ebml.version, ebml.doctype, ebml.doctype_version);
3348		✗	ebml_free(ebml_syntax, &ebml);
3349		✗	return AVERROR_PATCHWELCOME;
3350	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	} else if (ebml.doctype_version == 3) {
3351		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3352			"EBML header using unsupported features\n"
3353			"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
3354			ebml.version, ebml.doctype, ebml.doctype_version);
3355			}
3356	1/2 ✓ Branch 0 taken 640 times. ✗ Branch 1 not taken.	640	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
3357	2/2 ✓ Branch 0 taken 372 times. ✓ Branch 1 taken 268 times.	640	if (!strcmp(ebml.doctype, matroska_doctypes[i]))
3358		372	break;
3359	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
3360		✗	av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
3361		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
3362		✗	ebml_free(ebml_syntax, &ebml);
3363		✗	return AVERROR_INVALIDDATA;
3364			}
3365			}
3366		372	matroska->is_webm = !strcmp(ebml.doctype, "webm");
3367
3368		372	ebml_free(ebml_syntax, &ebml);
3369
3370		372	matroska->pkt = si->parse_pkt;
3371
3372			/* The next thing is a segment. */
3373		372	pos = avio_tell(matroska->ctx->pb);
3374		372	res = ebml_parse(matroska, matroska_segments, matroska);
3375			// Try resyncing until we find an EBML_STOP type element.
3376	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	while (res != 1) {
3377		✗	res = matroska_resync(matroska, pos);
3378		✗	if (res < 0)
3379		✗	return res;
3380		✗	pos = avio_tell(matroska->ctx->pb);
3381		✗	res = ebml_parse(matroska, matroska_segment, matroska);
3382		✗	if (res == AVERROR(EIO)) // EOF is translated to EIO, this exists the loop on EOF
3383		✗	return res;
3384			}
3385			/* Set data_offset as it might be needed later by seek_frame_generic. */
3386	2/2 ✓ Branch 0 taken 368 times. ✓ Branch 1 taken 4 times.	372	if (matroska->current_id == MATROSKA_ID_CLUSTER)
3387		368	si->data_offset = avio_tell(matroska->ctx->pb) - 4;
3388		372	matroska_execute_seekhead(matroska);
3389
3390	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (!matroska->time_scale)
3391		✗	matroska->time_scale = 1000000;
3392	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (isnan(matroska->duration))
3393		✗	matroska->duration = 0;
3394	2/2 ✓ Branch 0 taken 361 times. ✓ Branch 1 taken 11 times.	372	if (matroska->duration)
3395		361	matroska->ctx->duration = matroska->duration * matroska->time_scale *
3396		361	1000 / AV_TIME_BASE;
3397		372	av_dict_set(&s->metadata, "title", matroska->title, 0);
3398		372	av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
3399
3400	2/2 ✓ Branch 0 taken 18 times. ✓ Branch 1 taken 354 times.	372	if (matroska->date_utc.size == 8)
3401		18	matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
3402
3403		372	res = matroska_parse_tracks(s);
3404	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (res < 0)
3405		✗	return res;
3406
3407		372	attachments = attachments_list->elem;
3408	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 372 times.	376	for (j = 0; j < attachments_list->nb_elem; j++) {
3409	2/4 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	4	if (!(attachments[j].filename && attachments[j].mime &&
3410	2/4 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 4 times.	4	attachments[j].bin.data && attachments[j].bin.size > 0)) {
3411		✗	av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
3412			} else {
3413		4	AVStream *st = avformat_new_stream(s, NULL);
3414	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (!st)
3415		✗	break;
3416		4	av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
3417		4	av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
3418	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (attachments[j].description)
3419		✗	av_dict_set(&st->metadata, "title", attachments[j].description, 0);
3420		4	st->codecpar->codec_id = AV_CODEC_ID_NONE;
3421
3422	2/2 ✓ Branch 0 taken 16 times. ✓ Branch 1 taken 4 times.	20	for (i = 0; mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
3423	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if (av_strstart(attachments[j].mime, mkv_image_mime_tags[i].str, NULL)) {
3424		✗	st->codecpar->codec_id = mkv_image_mime_tags[i].id;
3425		✗	break;
3426			}
3427			}
3428
3429		4	attachments[j].stream = st;
3430
3431	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
3432		✗	res = ff_add_attached_pic(s, st, NULL, &attachments[j].bin.buf, 0);
3433		✗	if (res < 0)
3434		✗	return res;
3435			} else {
3436		4	st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
3437	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
3438		✗	break;
3439		4	memcpy(st->codecpar->extradata, attachments[j].bin.data,
3440		4	attachments[j].bin.size);
3441
3442	2/2 ✓ Branch 0 taken 16 times. ✓ Branch 1 taken 4 times.	20	for (i = 0; mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
3443	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if (av_strstart(attachments[j].mime, mkv_mime_tags[i].str, NULL)) {
3444		✗	st->codecpar->codec_id = mkv_mime_tags[i].id;
3445		✗	break;
3446			}
3447			}
3448			}
3449			}
3450			}
3451
3452		372	chapters = chapters_list->elem;
3453	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 372 times.	386	for (i = 0; i < chapters_list->nb_elem; i++)
3454	4/6 ✓ Branch 0 taken 14 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 14 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 4 times. ✓ Branch 5 taken 10 times.	14	if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
3455	1/2 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken.	4	(max_start == 0 || chapters[i].start > max_start)) {
3456		28	chapters[i].chapter =
3457		14	avpriv_new_chapter(s, chapters[i].uid,
3458		14	(AVRational) { 1, 1000000000 },
3459		14	chapters[i].start, chapters[i].end,
3460		14	chapters[i].title);
3461		14	max_start = chapters[i].start;
3462			}
3463
3464		372	matroska_add_index_entries(matroska);
3465
3466		372	matroska_convert_tags(s);
3467
3468		372	return 0;
3469			}
3470
3471			/*
3472			* Put one packet in an application-supplied AVPacket struct.
3473			* Returns 0 on success or -1 on failure.
3474			*/
3475		60235	static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
3476			AVPacket *pkt)
3477			{
3478	2/2 ✓ Branch 0 taken 29495 times. ✓ Branch 1 taken 30740 times.	60235	if (matroska->queue.head) {
3479		29495	MatroskaTrack *tracks = matroska->tracks.elem;
3480			MatroskaTrack *track;
3481
3482		29495	avpriv_packet_list_get(&matroska->queue, pkt);
3483		29495	track = &tracks[pkt->stream_index];
3484	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29495 times.	29495	if (track->has_palette) {
3485		✗	uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3486		✗	if (!pal) {
3487		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
3488			} else {
3489		✗	memcpy(pal, track->palette, AVPALETTE_SIZE);
3490			}
3491		✗	track->has_palette = 0;
3492			}
3493		29495	return 0;
3494			}
3495
3496		30740	return -1;
3497			}
3498
3499			/*
3500			* Free all packets in our internal queue.
3501			*/
3502		1210	static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3503			{
3504		1210	avpriv_packet_list_free(&matroska->queue);
3505		1210	}
3506
3507		29865	static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3508			int size, int type, AVIOContext *pb,
3509			uint32_t lace_size[256], int *laces)
3510			{
3511			int n;
3512		29865	uint8_t *data = *buf;
3513
3514	2/2 ✓ Branch 0 taken 29790 times. ✓ Branch 1 taken 75 times.	29865	if (!type) {
3515		29790	*laces = 1;
3516		29790	lace_size[0] = size;
3517		29790	return 0;
3518			}
3519
3520	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 75 times.	75	if (size <= 0)
3521		✗	return AVERROR_INVALIDDATA;
3522
3523		75	*laces = *data + 1;
3524		75	data += 1;
3525		75	size -= 1;
3526
3527	3/4 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 17 times. ✓ Branch 2 taken 54 times. ✗ Branch 3 not taken.	75	switch (type) {
3528		4	case 0x1: /* Xiph lacing */
3529			{
3530			uint8_t temp;
3531		4	uint32_t total = 0;
3532	2/2 ✓ Branch 0 taken 23 times. ✓ Branch 1 taken 4 times.	27	for (n = 0; n < *laces - 1; n++) {
3533		23	lace_size[n] = 0;
3534
3535			do {
3536	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 25 times.	25	if (size <= total)
3537		✗	return AVERROR_INVALIDDATA;
3538		25	temp = *data;
3539		25	total += temp;
3540		25	lace_size[n] += temp;
3541		25	data += 1;
3542		25	size -= 1;
3543	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 23 times.	25	} while (temp == 0xff);
3544			}
3545	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (size < total)
3546		✗	return AVERROR_INVALIDDATA;
3547
3548		4	lace_size[n] = size - total;
3549		4	break;
3550			}
3551
3552		17	case 0x2: /* fixed-size lacing */
3553	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 17 times.	17	if (size % (*laces))
3554		✗	return AVERROR_INVALIDDATA;
3555	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 17 times.	98	for (n = 0; n < *laces; n++)
3556		81	lace_size[n] = size / *laces;
3557		17	break;
3558
3559		54	case 0x3: /* EBML lacing */
3560			{
3561			uint64_t num;
3562			uint64_t total;
3563			int offset;
3564
3565		54	avio_skip(pb, 4);
3566
3567		54	n = ebml_read_num(matroska, pb, 8, &num, 1);
3568	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (n < 0)
3569		✗	return n;
3570	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (num > INT_MAX)
3571		✗	return AVERROR_INVALIDDATA;
3572
3573		54	total = lace_size[0] = num;
3574		54	offset = n;
3575	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 54 times.	290	for (n = 1; n < *laces - 1; n++) {
3576			int64_t snum;
3577			int r;
3578		236	r = matroska_ebmlnum_sint(matroska, pb, &snum);
3579	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (r < 0)
3580		✗	return r;
3581	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (lace_size[n - 1] + snum > (uint64_t)INT_MAX)
3582		✗	return AVERROR_INVALIDDATA;
3583
3584		236	lace_size[n] = lace_size[n - 1] + snum;
3585		236	total += lace_size[n];
3586		236	offset += r;
3587			}
3588		54	data += offset;
3589		54	size -= offset;
3590	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (size < total)
3591		✗	return AVERROR_INVALIDDATA;
3592
3593		54	lace_size[*laces - 1] = size - total;
3594		54	break;
3595			}
3596			}
3597
3598		75	*buf = data;
3599
3600		75	return 0;
3601			}
3602
3603		✗	static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3604			MatroskaTrack *track, AVStream *st,
3605			uint8_t *data, int size, uint64_t timecode,
3606			int64_t pos)
3607			{
3608		✗	const int a = st->codecpar->block_align;
3609		✗	const int sps = track->audio.sub_packet_size;
3610		✗	const int cfs = track->audio.coded_framesize;
3611		✗	const int h = track->audio.sub_packet_h;
3612		✗	const int w = track->audio.frame_size;
3613		✗	int y = track->audio.sub_packet_cnt;
3614			int x;
3615
3616		✗	if (!track->audio.pkt_cnt) {
3617		✗	if (track->audio.sub_packet_cnt == 0)
3618		✗	track->audio.buf_timecode = timecode;
3619		✗	if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3620		✗	if (size < cfs * h / 2) {
3621		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3622			"Corrupt int4 RM-style audio packet size\n");
3623		✗	return AVERROR_INVALIDDATA;
3624			}
3625		✗	for (x = 0; x < h / 2; x++)
3626		✗	memcpy(track->audio.buf + x * 2 * w + y * cfs,
3627		✗	data + x * cfs, cfs);
3628		✗	} else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3629		✗	if (size < w) {
3630		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3631			"Corrupt sipr RM-style audio packet size\n");
3632		✗	return AVERROR_INVALIDDATA;
3633			}
3634		✗	memcpy(track->audio.buf + y * w, data, w);
3635			} else {
3636		✗	if (size < w) {
3637		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3638			"Corrupt generic RM-style audio packet size\n");
3639		✗	return AVERROR_INVALIDDATA;
3640			}
3641		✗	for (x = 0; x < w / sps; x++)
3642		✗	memcpy(track->audio.buf +
3643		✗	sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3644		✗	data + x * sps, sps);
3645			}
3646
3647		✗	if (++track->audio.sub_packet_cnt >= h) {
3648		✗	if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3649		✗	ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3650		✗	track->audio.sub_packet_cnt = 0;
3651		✗	track->audio.pkt_cnt = h * w / a;
3652			}
3653			}
3654
3655		✗	while (track->audio.pkt_cnt) {
3656			int ret;
3657		✗	AVPacket *pkt = matroska->pkt;
3658
3659		✗	ret = av_new_packet(pkt, a);
3660		✗	if (ret < 0) {
3661		✗	return ret;
3662			}
3663		✗	memcpy(pkt->data,
3664		✗	track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3665			a);
3666		✗	pkt->pts = track->audio.buf_timecode;
3667		✗	track->audio.buf_timecode = AV_NOPTS_VALUE;
3668		✗	pkt->pos = pos;
3669		✗	pkt->stream_index = st->index;
3670		✗	ret = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3671		✗	if (ret < 0) {
3672		✗	av_packet_unref(pkt);
3673		✗	return AVERROR(ENOMEM);
3674			}
3675			}
3676
3677		✗	return 0;
3678			}
3679
3680			/* reconstruct full wavpack blocks from mangled matroska ones */
3681		24	static int matroska_parse_wavpack(MatroskaTrack *track,
3682			uint8_t **data, int *size)
3683			{
3684		24	uint8_t *dst = NULL;
3685		24	uint8_t *src = *data;
3686		24	int dstlen = 0;
3687		24	int srclen = *size;
3688			uint32_t samples;
3689			uint16_t ver;
3690		24	int ret, offset = 0;
3691
3692	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (srclen < 12)
3693		✗	return AVERROR_INVALIDDATA;
3694
3695			av_assert1(track->stream->codecpar->extradata_size >= 2);
3696		24	ver = AV_RL16(track->stream->codecpar->extradata);
3697
3698		24	samples = AV_RL32(src);
3699		24	src += 4;
3700		24	srclen -= 4;
3701
3702	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 24 times.	136	while (srclen >= 8) {
3703			int multiblock;
3704			uint32_t blocksize;
3705			uint8_t *tmp;
3706
3707		112	uint32_t flags = AV_RL32(src);
3708		112	uint32_t crc = AV_RL32(src + 4);
3709		112	src += 8;
3710		112	srclen -= 8;
3711
3712		112	multiblock = (flags & 0x1800) != 0x1800;
3713	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 2 times.	112	if (multiblock) {
3714	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 110 times.	110	if (srclen < 4) {
3715		✗	ret = AVERROR_INVALIDDATA;
3716		✗	goto fail;
3717			}
3718		110	blocksize = AV_RL32(src);
3719		110	src += 4;
3720		110	srclen -= 4;
3721			} else
3722		2	blocksize = srclen;
3723
3724	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (blocksize > srclen) {
3725		✗	ret = AVERROR_INVALIDDATA;
3726		✗	goto fail;
3727			}
3728
3729		112	tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3730	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (!tmp) {
3731		✗	ret = AVERROR(ENOMEM);
3732		✗	goto fail;
3733			}
3734		112	dst = tmp;
3735		112	dstlen += blocksize + 32;
3736
3737		112	AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3738		112	AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3739		112	AV_WL16(dst + offset + 8, ver); // version
3740		112	AV_WL16(dst + offset + 10, 0); // track/index_no
3741		112	AV_WL32(dst + offset + 12, 0); // total samples
3742		112	AV_WL32(dst + offset + 16, 0); // block index
3743		112	AV_WL32(dst + offset + 20, samples); // number of samples
3744		112	AV_WL32(dst + offset + 24, flags); // flags
3745		112	AV_WL32(dst + offset + 28, crc); // crc
3746		112	memcpy(dst + offset + 32, src, blocksize); // block data
3747
3748		112	src += blocksize;
3749		112	srclen -= blocksize;
3750		112	offset += blocksize + 32;
3751			}
3752
3753		24	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3754
3755		24	*data = dst;
3756		24	*size = dstlen;
3757
3758		24	return 0;
3759
3760		✗	fail:
3761		✗	av_freep(&dst);
3762		✗	return ret;
3763			}
3764
3765		11	static int matroska_parse_prores(MatroskaTrack *track,
3766			uint8_t **data, int *size)
3767			{
3768			uint8_t *dst;
3769		11	int dstlen = *size + 8;
3770
3771		11	dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3772	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (!dst)
3773		✗	return AVERROR(ENOMEM);
3774
3775		11	AV_WB32(dst, dstlen);
3776		11	AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3777		11	memcpy(dst + 8, *data, dstlen - 8);
3778		11	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3779
3780		11	*data = dst;
3781		11	*size = dstlen;
3782
3783		11	return 0;
3784			}
3785
3786		90	static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3787			MatroskaTrack *track,
3788			AVStream *st,
3789			uint8_t *data, int data_len,
3790			uint64_t timecode,
3791			uint64_t duration,
3792			int64_t pos)
3793			{
3794		90	AVPacket *pkt = matroska->pkt;
3795			uint8_t *id, *settings, *text, *buf;
3796			int id_len, settings_len, text_len;
3797			uint8_t *p, *q;
3798			int err;
3799
3800	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (data_len <= 0)
3801		✗	return AVERROR_INVALIDDATA;
3802
3803		90	p = data;
3804		90	q = data + data_len;
3805
3806		90	id = p;
3807		90	id_len = -1;
3808	1/2 ✓ Branch 0 taken 192 times. ✗ Branch 1 not taken.	192	while (p < q) {
3809	3/4 ✓ Branch 0 taken 192 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 90 times. ✓ Branch 3 taken 102 times.	192	if (*p == '\r' || *p == '\n') {
3810		90	id_len = p - id;
3811	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3812		✗	p++;
3813		90	break;
3814			}
3815		102	p++;
3816			}
3817
3818	2/4 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 90 times.	90	if (p >= q || *p != '\n')
3819		✗	return AVERROR_INVALIDDATA;
3820		90	p++;
3821
3822		90	settings = p;
3823		90	settings_len = -1;
3824	1/2 ✓ Branch 0 taken 546 times. ✗ Branch 1 not taken.	546	while (p < q) {
3825	3/4 ✓ Branch 0 taken 546 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 90 times. ✓ Branch 3 taken 456 times.	546	if (*p == '\r' || *p == '\n') {
3826		90	settings_len = p - settings;
3827	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3828		✗	p++;
3829		90	break;
3830			}
3831		456	p++;
3832			}
3833
3834	2/4 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 90 times.	90	if (p >= q || *p != '\n')
3835		✗	return AVERROR_INVALIDDATA;
3836		90	p++;
3837
3838		90	text = p;
3839		90	text_len = q - p;
3840	1/2 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken.	90	while (text_len > 0) {
3841		90	const int len = text_len - 1;
3842		90	const uint8_t c = p[len];
3843	2/4 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 90 times. ✗ Branch 3 not taken.	90	if (c != '\r' && c != '\n')
3844		90	break;
3845		✗	text_len = len;
3846			}
3847
3848		90	err = av_new_packet(pkt, text_len);
3849	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3850		✗	return err;
3851			}
3852
3853		90	memcpy(pkt->data, text, text_len);
3854
3855	2/2 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 78 times.	90	if (id_len > 0) {
3856		12	buf = av_packet_new_side_data(pkt,
3857			AV_PKT_DATA_WEBVTT_IDENTIFIER,
3858			id_len);
3859	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!buf) {
3860		✗	av_packet_unref(pkt);
3861		✗	return AVERROR(ENOMEM);
3862			}
3863		12	memcpy(buf, id, id_len);
3864			}
3865
3866	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 66 times.	90	if (settings_len > 0) {
3867		24	buf = av_packet_new_side_data(pkt,
3868			AV_PKT_DATA_WEBVTT_SETTINGS,
3869			settings_len);
3870	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (!buf) {
3871		✗	av_packet_unref(pkt);
3872		✗	return AVERROR(ENOMEM);
3873			}
3874		24	memcpy(buf, settings, settings_len);
3875			}
3876
3877			// Do we need this for subtitles?
3878			// pkt->flags = AV_PKT_FLAG_KEY;
3879
3880		90	pkt->stream_index = st->index;
3881		90	pkt->pts = timecode;
3882
3883			// Do we need this for subtitles?
3884			// pkt->dts = timecode;
3885
3886		90	pkt->duration = duration;
3887		90	pkt->pos = pos;
3888
3889		90	err = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3890	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3891		✗	av_packet_unref(pkt);
3892		✗	return AVERROR(ENOMEM);
3893			}
3894
3895		90	return 0;
3896			}
3897
3898		136	static int matroska_parse_block_additional(MatroskaDemuxContext *matroska,
3899			MatroskaTrack *track, AVPacket *pkt,
3900			const uint8_t *data, int size, uint64_t id)
3901			{
3902		136	const EbmlList *mappings_list = &track->block_addition_mappings;
3903		136	MatroskaBlockAdditionMapping *mappings = mappings_list->elem, *mapping = NULL;
3904			uint8_t *side_data;
3905			int res;
3906
3907	4/6 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 124 times. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 12 times.	136	if (!matroska->is_webm && track->max_block_additional_id && id > track->max_block_additional_id) {
3908		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
3909		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
3910			"BlockAddID %"PRIu64" is higher than the reported MaxBlockAdditionID %"PRIu64" "
3911			"for Track with TrackNumber %"PRIu64"\n", id, track->max_block_additional_id,
3912			track->num);
3913		✗	if (strict)
3914		✗	return AVERROR_INVALIDDATA;
3915			}
3916
3917	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 134 times.	136	for (int i = 0; i < mappings_list->nb_elem; i++) {
3918	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (id != mappings[i].value)
3919		✗	continue;
3920		2	mapping = &mappings[i];
3921		2	break;
3922			}
3923
3924	5/6 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 130 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 4 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	136	if (id != 1 && !matroska->is_webm && !mapping) {
3925		✗	av_log(matroska->ctx, AV_LOG_WARNING, "BlockAddID %"PRIu64" has no mapping. Skipping\n", id);
3926		✗	return 0;
3927			}
3928
3929	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 134 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	136	if (mapping && mapping->type)
3930		2	id = mapping->type;
3931
3932	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 130 times.	136	switch (id) {
3933		6	case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35: {
3934			GetByteContext bc;
3935			int country_code, provider_code;
3936			int provider_oriented_code, application_identifier;
3937			size_t hdrplus_size;
3938			AVDynamicHDRPlus *hdrplus;
3939
3940	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (size < 6)
3941		6	break; //ignore
3942
3943		6	bytestream2_init(&bc, data, size);
3944
3945			/* ITU-T T.35 metadata */
3946		6	country_code = bytestream2_get_byteu(&bc);
3947	1/3 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken.	6	switch (country_code) {
3948		6	case ITU_T_T35_COUNTRY_CODE_US:
3949		6	provider_code = bytestream2_get_be16u(&bc);
3950
3951	1/3 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken.	6	switch (provider_code) {
3952		6	case ITU_T_T35_PROVIDER_CODE_SAMSUNG: {
3953		6	provider_oriented_code = bytestream2_get_be16u(&bc);
3954		6	application_identifier = bytestream2_get_byteu(&bc);
3955
3956	2/4 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times. ✗ Branch 3 not taken.	6	if (provider_oriented_code != 1 || application_identifier != 4)
3957			break; // ignore
3958
3959		6	hdrplus = av_dynamic_hdr_plus_alloc(&hdrplus_size);
3960	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!hdrplus)
3961		✗	return AVERROR(ENOMEM);
3962
3963	1/2 ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken.	6	if ((res = av_dynamic_hdr_plus_from_t35(hdrplus, bc.buffer,
3964	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times.	12	bytestream2_get_bytes_left(&bc))) < 0 ||
3965		6	(res = av_packet_add_side_data(pkt, AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
3966			(uint8_t *)hdrplus, hdrplus_size)) < 0) {
3967		✗	av_free(hdrplus);
3968		✗	return res;
3969			}
3970
3971		6	break;
3972			}
3973		✗	case ITU_T_T35_PROVIDER_CODE_SMPTE: {
3974			AVDynamicHDRSmpte2094App5 *hdr_smpte_2094_app5;
3975			size_t hdr_smpte_2094_app5_size;
3976
3977		✗	provider_oriented_code = bytestream2_get_be16u(&bc);
3978		✗	if (provider_oriented_code != 1)
3979		✗	break; // ignore
3980
3981		✗	hdr_smpte_2094_app5 = av_dynamic_hdr_smpte2094_app5_alloc(&hdr_smpte_2094_app5_size);
3982		✗	if (!hdr_smpte_2094_app5)
3983		✗	return AVERROR(ENOMEM);
3984
3985		✗	if ((res = av_dynamic_hdr_smpte2094_app5_from_t35(hdr_smpte_2094_app5,
3986			bc.buffer,
3987		✗	bytestream2_get_bytes_left(&bc))) < 0 ||
3988		✗	(res = av_packet_add_side_data(pkt,
3989			AV_PKT_DATA_DYNAMIC_HDR_SMPTE_2094_APP5,
3990			(uint8_t *)hdr_smpte_2094_app5,
3991			hdr_smpte_2094_app5_size)) < 0) {
3992		✗	av_free(hdr_smpte_2094_app5);
3993		✗	return res;
3994			}
3995
3996		✗	break;
3997			}
3998		✗	default:
3999		✗	break;
4000			}
4001		6	break;
4002		✗	case ITU_T_T35_COUNTRY_CODE_UK:
4003		✗	bytestream2_skipu(&bc, 1); // t35_uk_country_code_second_octet
4004		✗	if (bytestream2_get_bytes_left(&bc) < 2)
4005		✗	return AVERROR_INVALIDDATA;
4006
4007		✗	provider_code = bytestream2_get_be16u(&bc);
4008
4009		✗	switch (provider_code) {
4010		✗	case ITU_T_T35_PROVIDER_CODE_VNOVA: {
4011			uint8_t *data;
4012		✗	int left = bytestream2_get_bytes_left(&bc);
4013
4014		✗	if (left < 2)
4015		✗	return AVERROR_INVALIDDATA;
4016		✗	data = av_packet_new_side_data(pkt, AV_PKT_DATA_LCEVC, left);
4017		✗	if (!data)
4018		✗	return AVERROR(ENOMEM);
4019
4020		✗	bytestream2_get_bufferu(&bc, data, left);
4021
4022		✗	return 0;
4023			}
4024		✗	default:
4025		✗	break;
4026			}
4027		✗	break;
4028		✗	default:
4029		✗	break;
4030			}
4031		6	break;
4032			}
4033		130	default:
4034		130	side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
4035			size + (size_t)8);
4036	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 130 times.	130	if (!side_data)
4037		✗	return AVERROR(ENOMEM);
4038
4039		130	AV_WB64(side_data, id);
4040		130	memcpy(side_data + 8, data, size);
4041		130	break;
4042			}
4043
4044		136	return 0;
4045			}
4046
4047		30152	static int matroska_parse_frame(MatroskaDemuxContext *matroska,
4048			MatroskaTrack *track, AVStream *st,
4049			AVBufferRef *buf, uint8_t *data, int pkt_size,
4050			uint64_t timecode, uint64_t lace_duration,
4051			int64_t pos, int is_keyframe,
4052			MatroskaBlockMore *blockmore, int nb_blockmore,
4053			int64_t discard_padding)
4054			{
4055		30152	uint8_t *pkt_data = data;
4056		30152	int res = 0;
4057		30152	AVPacket *pkt = matroska->pkt;
4058
4059	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 30128 times.	30152	if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
4060		24	res = matroska_parse_wavpack(track, &pkt_data, &pkt_size);
4061	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (res < 0) {
4062		✗	av_log(matroska->ctx, AV_LOG_ERROR,
4063			"Error parsing a wavpack block.\n");
4064		✗	goto fail;
4065			}
4066	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (!buf)
4067		2	av_freep(&data);
4068		24	buf = NULL;
4069			}
4070
4071	2/2 ✓ Branch 0 taken 13 times. ✓ Branch 1 taken 30139 times.	30152	if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
4072	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 2 times.	13	AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
4073		11	res = matroska_parse_prores(track, &pkt_data, &pkt_size);
4074	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (res < 0) {
4075		✗	av_log(matroska->ctx, AV_LOG_ERROR,
4076			"Error parsing a prores block.\n");
4077		✗	goto fail;
4078			}
4079	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 9 times.	11	if (!buf)
4080		2	av_freep(&data);
4081		11	buf = NULL;
4082			}
4083
4084	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 30152 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	30152	if (!pkt_size && !nb_blockmore)
4085		✗	goto no_output;
4086
4087	5/6 ✓ Branch 0 taken 26934 times. ✓ Branch 1 taken 3218 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 26922 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 12 times.	30152	if (!matroska->is_webm && nb_blockmore && !track->max_block_additional_id) {
4088		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
4089		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
4090			"Unexpected BlockAdditions found in a Block from Track with TrackNumber %"PRIu64" "
4091			"where MaxBlockAdditionID is 0\n", track->num);
4092		✗	if (strict) {
4093		✗	res = AVERROR_INVALIDDATA;
4094		✗	goto fail;
4095			}
4096			}
4097
4098	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 30040 times.	30152	if (!buf)
4099		112	pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
4100			NULL, NULL, 0);
4101			else
4102		30040	pkt->buf = av_buffer_ref(buf);
4103
4104	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30152 times.	30152	if (!pkt->buf) {
4105		✗	res = AVERROR(ENOMEM);
4106		✗	goto fail;
4107			}
4108
4109		30152	pkt->data = pkt_data;
4110		30152	pkt->size = pkt_size;
4111		30152	pkt->flags = is_keyframe;
4112		30152	pkt->stream_index = st->index;
4113
4114	2/2 ✓ Branch 0 taken 136 times. ✓ Branch 1 taken 30152 times.	30288	for (int i = 0; i < nb_blockmore; i++) {
4115		136	MatroskaBlockMore *more = &blockmore[i];
4116
4117	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 136 times.	136	if (!more->additional.size)
4118		✗	continue;
4119
4120		136	res = matroska_parse_block_additional(matroska, track, pkt, more->additional.data,
4121			more->additional.size, more->additional_id);
4122	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 136 times.	136	if (res < 0) {
4123		✗	av_packet_unref(pkt);
4124		✗	return res;
4125			}
4126			}
4127
4128	2/2 ✓ Branch 0 taken 27 times. ✓ Branch 1 taken 30125 times.	30152	if (discard_padding) {
4129		27	uint8_t *side_data = av_packet_new_side_data(pkt,
4130			AV_PKT_DATA_SKIP_SAMPLES,
4131			10);
4132	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 27 times.	27	if (!side_data) {
4133		✗	av_packet_unref(pkt);
4134		✗	return AVERROR(ENOMEM);
4135			}
4136		27	discard_padding = av_rescale_q(discard_padding,
4137		27	(AVRational){1, 1000000000},
4138		27	(AVRational){1, st->codecpar->sample_rate});
4139	1/2 ✓ Branch 0 taken 27 times. ✗ Branch 1 not taken.	27	if (discard_padding > 0) {
4140		27	AV_WL32A(side_data + 4, discard_padding);
4141			} else {
4142		✗	AV_WL32A(side_data, -discard_padding);
4143			}
4144			}
4145
4146	2/2 ✓ Branch 0 taken 429 times. ✓ Branch 1 taken 29723 times.	30152	if (track->ms_compat)
4147		429	pkt->dts = timecode;
4148			else
4149		29723	pkt->pts = timecode;
4150		30152	pkt->pos = pos;
4151		30152	pkt->duration = lace_duration;
4152
4153		30152	res = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
4154	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30152 times.	30152	if (res < 0) {
4155		✗	av_packet_unref(pkt);
4156		✗	return AVERROR(ENOMEM);
4157			}
4158
4159		30152	return 0;
4160
4161		✗	no_output:
4162		✗	fail:
4163		✗	if (!buf)
4164		✗	av_free(pkt_data);
4165		✗	return res;
4166			}
4167
4168		30725	static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
4169			int size, int64_t pos, uint64_t cluster_time,
4170			uint64_t block_duration, int is_keyframe,
4171			MatroskaBlockMore *blockmore, int nb_blockmore,
4172			int64_t cluster_pos, int64_t discard_padding)
4173			{
4174		30725	uint64_t timecode = AV_NOPTS_VALUE;
4175			MatroskaTrack *track;
4176			FFIOContext pb;
4177		30725	int res = 0;
4178			AVStream *st;
4179			int16_t block_time;
4180			uint32_t lace_size[256];
4181		30725	int n, flags, laces = 0;
4182			uint64_t num;
4183			int trust_default_duration;
4184
4185			av_assert1(buf);
4186
4187		30725	ffio_init_read_context(&pb, data, size);
4188
4189	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 30725 times.	30725	if ((n = ebml_read_num(matroska, &pb.pub, 8, &num, 1)) < 0)
4190		✗	return n;
4191		30725	data += n;
4192		30725	size -= n;
4193
4194		30725	track = matroska_find_track_by_num(matroska, num);
4195	3/4 ✓ Branch 0 taken 30724 times. ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 30724 times.	30725	if (!track || size < 3)
4196		1	return AVERROR_INVALIDDATA;
4197
4198	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30724 times.	30724	if (!(st = track->stream)) {
4199		✗	av_log(matroska->ctx, AV_LOG_VERBOSE,
4200			"No stream associated to TrackNumber %"PRIu64". "
4201			"Ignoring Block with this TrackNumber.\n", num);
4202		✗	return 0;
4203			}
4204
4205	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 30413 times.	30724	if (st->discard >= AVDISCARD_ALL)
4206		311	return res;
4207	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30413 times.	30413	if (block_duration > INT64_MAX)
4208		✗	block_duration = INT64_MAX;
4209
4210		30413	block_time = sign_extend(AV_RB16(data), 16);
4211		30413	data += 2;
4212		30413	flags = *data++;
4213		30413	size -= 3;
4214	2/2 ✓ Branch 0 taken 29970 times. ✓ Branch 1 taken 443 times.	30413	if (is_keyframe == -1)
4215		29970	is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
4216
4217	3/4 ✓ Branch 0 taken 30413 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 79 times. ✓ Branch 3 taken 30334 times.	30413	if (cluster_time != (uint64_t) -1 &&
4218	2/2 ✓ Branch 0 taken 63 times. ✓ Branch 1 taken 16 times.	79	(block_time >= 0 || cluster_time >= -block_time)) {
4219		30397	uint64_t timecode_cluster_in_track_tb = (double) cluster_time / track->time_scale;
4220		30397	timecode = timecode_cluster_in_track_tb + block_time - track->codec_delay_in_track_tb;
4221	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 30269 times.	30397	if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
4222	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 122 times.	128	timecode < track->end_timecode)
4223		6	is_keyframe = 0; /* overlapping subtitles are not key frame */
4224	2/2 ✓ Branch 0 taken 26807 times. ✓ Branch 1 taken 3590 times.	30397	if (is_keyframe) {
4225		26807	ff_reduce_index(matroska->ctx, st->index);
4226		26807	av_add_index_entry(st, cluster_pos, timecode, 0, 0,
4227			AVINDEX_KEYFRAME);
4228			}
4229			}
4230
4231	2/2 ✓ Branch 0 taken 593 times. ✓ Branch 1 taken 29820 times.	30413	if (matroska->skip_to_keyframe &&
4232	1/2 ✓ Branch 0 taken 593 times. ✗ Branch 1 not taken.	593	track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
4233			// Compare signed timecodes. Timecode may be negative due to codec delay
4234			// offset. We don't support timestamps greater than int64_t anyway - see
4235			// AVPacket's pts.
4236	2/2 ✓ Branch 0 taken 548 times. ✓ Branch 1 taken 45 times.	593	if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
4237		548	return res;
4238	1/2 ✓ Branch 0 taken 45 times. ✗ Branch 1 not taken.	45	if (is_keyframe)
4239		45	matroska->skip_to_keyframe = 0;
4240		✗	else if (!ffstream(st)->skip_to_keyframe) {
4241		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
4242		✗	matroska->skip_to_keyframe = 0;
4243			}
4244			}
4245
4246		29865	res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
4247			&pb.pub, lace_size, &laces);
4248	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29865 times.	29865	if (res < 0) {
4249		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing frame sizes.\n");
4250		✗	return res;
4251			}
4252
4253		29865	trust_default_duration = track->default_duration != 0;
4254	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 29865 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	29865	if (track->audio.samplerate == 8000 && trust_default_duration) {
4255			// If this is needed for more codecs, then add them here
4256		✗	if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
4257		✗	if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
4258		✗	trust_default_duration = 0;
4259			}
4260			}
4261
4262	4/4 ✓ Branch 0 taken 29584 times. ✓ Branch 1 taken 281 times. ✓ Branch 2 taken 4267 times. ✓ Branch 3 taken 25317 times.	29865	if (!block_duration && trust_default_duration)
4263		4267	block_duration = track->default_duration * laces / matroska->time_scale;
4264
4265	5/6 ✓ Branch 0 taken 29865 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 76 times. ✓ Branch 3 taken 29789 times. ✓ Branch 4 taken 60 times. ✓ Branch 5 taken 16 times.	29865	if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
4266		29849	track->end_timecode =
4267		29849	FFMAX(track->end_timecode, timecode + block_duration);
4268
4269	2/2 ✓ Branch 0 taken 30242 times. ✓ Branch 1 taken 29865 times.	60107	for (n = 0; n < laces; n++) {
4270		30242	int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
4271		30242	uint8_t *out_data = data;
4272		30242	int out_size = lace_size[n];
4273
4274	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 30161 times.	30242	if (track->needs_decoding) {
4275		81	res = matroska_decode_buffer(&out_data, &out_size, track);
4276	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 81 times.	81	if (res < 0)
4277		✗	return res;
4278			/* Given that we are here means that out_data is no longer
4279			* owned by buf, so set it to NULL. This depends upon
4280			* zero-length header removal compression being ignored. */
4281			av_assert1(out_data != data);
4282		81	buf = NULL;
4283			}
4284
4285	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30242 times.	30242	if (track->audio.buf) {
4286		✗	res = matroska_parse_rm_audio(matroska, track, st,
4287			out_data, out_size,
4288			timecode, pos);
4289		✗	if (!buf)
4290		✗	av_free(out_data);
4291		✗	if (res)
4292		✗	return res;
4293	2/2 ✓ Branch 0 taken 90 times. ✓ Branch 1 taken 30152 times.	30242	} else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
4294		90	res = matroska_parse_webvtt(matroska, track, st,
4295			out_data, out_size,
4296			timecode, lace_duration,
4297			pos);
4298	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (!buf)
4299		✗	av_free(out_data);
4300	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (res)
4301		✗	return res;
4302			} else {
4303		30152	res = matroska_parse_frame(matroska, track, st, buf, out_data,
4304			out_size, timecode, lace_duration,
4305			pos, is_keyframe,
4306			blockmore, nb_blockmore,
4307			discard_padding);
4308	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30152 times.	30152	if (res)
4309		✗	return res;
4310			}
4311
4312	2/2 ✓ Branch 0 taken 30154 times. ✓ Branch 1 taken 88 times.	30242	if (timecode != AV_NOPTS_VALUE)
4313	2/2 ✓ Branch 0 taken 4837 times. ✓ Branch 1 taken 25317 times.	30154	timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
4314		30242	data += lace_size[n];
4315			}
4316
4317		29865	return 0;
4318			}
4319
4320		31127	static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
4321			{
4322		31127	MatroskaCluster *cluster = &matroska->current_cluster;
4323		31127	MatroskaBlock *block = &cluster->block;
4324			int res;
4325
4326	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31127 times.	31127	av_assert0(matroska->num_levels <= 2U);
4327
4328	2/2 ✓ Branch 0 taken 1152 times. ✓ Branch 1 taken 29975 times.	31127	if (matroska->num_levels == 1) {
4329		1152	res = ebml_parse(matroska, matroska_segment, NULL);
4330
4331	2/2 ✓ Branch 0 taken 806 times. ✓ Branch 1 taken 346 times.	1152	if (res == 1) {
4332			/* Found a cluster: subtract the size of the ID already read. */
4333		806	cluster->pos = avio_tell(matroska->ctx->pb) - 4;
4334
4335		806	res = ebml_parse(matroska, matroska_cluster_enter, cluster);
4336	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 806 times.	806	if (res < 0)
4337		✗	return res;
4338			}
4339			}
4340
4341	2/2 ✓ Branch 0 taken 30740 times. ✓ Branch 1 taken 387 times.	31127	if (matroska->num_levels == 2) {
4342			/* We are inside a cluster. */
4343		30740	res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
4344
4345	4/4 ✓ Branch 0 taken 30730 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 30725 times. ✓ Branch 3 taken 5 times.	30740	if (res >= 0 && block->bin.size > 0) {
4346	2/2 ✓ Branch 0 taken 484 times. ✓ Branch 1 taken 30241 times.	30725	int is_keyframe = block->non_simple ? block->reference.count == 0 : -1;
4347
4348		30725	res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
4349			block->bin.size, block->bin.pos,
4350			cluster->timecode, block->duration,
4351		30725	is_keyframe, block->blockmore.elem,
4352			block->blockmore.nb_elem, cluster->pos,
4353			block->discard_padding);
4354			}
4355
4356		30740	ebml_free(matroska_blockgroup, block);
4357		30740	memset(block, 0, sizeof(*block));
4358	2/2 ✓ Branch 0 taken 359 times. ✓ Branch 1 taken 28 times.	387	} else if (!matroska->num_levels) {
4359	2/2 ✓ Branch 1 taken 352 times. ✓ Branch 2 taken 7 times.	359	if (!avio_feof(matroska->ctx->pb)) {
4360		352	avio_r8(matroska->ctx->pb);
4361	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 352 times.	352	if (!avio_feof(matroska->ctx->pb)) {
4362		✗	av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
4363			"end of segment.\n");
4364		✗	return AVERROR_INVALIDDATA;
4365			}
4366			}
4367		359	matroska->done = 1;
4368		359	return AVERROR_EOF;
4369			}
4370
4371		30768	return res;
4372			}
4373
4374		29881	static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
4375			{
4376		29881	MatroskaDemuxContext *matroska = s->priv_data;
4377		29881	int ret = 0;
4378
4379	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 29871 times.	29881	if (matroska->resync_pos == -1) {
4380			// This can only happen if generic seeking has been used.
4381		10	matroska->resync_pos = avio_tell(s->pb);
4382			}
4383
4384	2/2 ✓ Branch 1 taken 30740 times. ✓ Branch 2 taken 29495 times.	60235	while (matroska_deliver_packet(matroska, pkt)) {
4385	2/2 ✓ Branch 0 taken 386 times. ✓ Branch 1 taken 30354 times.	30740	if (matroska->done)
4386	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 376 times.	386	return (ret < 0) ? ret : AVERROR_EOF;
4387	4/4 ✓ Branch 1 taken 346 times. ✓ Branch 2 taken 30008 times. ✓ Branch 3 taken 13 times. ✓ Branch 4 taken 333 times.	30354	if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
4388		13	ret = matroska_resync(matroska, matroska->resync_pos);
4389			}
4390
4391		29495	return 0;
4392			}
4393
4394		55	static int matroska_read_seek(AVFormatContext *s, int stream_index,
4395			int64_t timestamp, int flags)
4396			{
4397		55	MatroskaDemuxContext *matroska = s->priv_data;
4398		55	MatroskaTrack *tracks = NULL;
4399		55	AVStream *st = s->streams[stream_index];
4400		55	FFStream *const sti = ffstream(st);
4401			int i, index;
4402
4403			/* Parse the CUES now since we need the index data to seek. */
4404	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 52 times.	55	if (matroska->cues_parsing_deferred > 0) {
4405		3	matroska->cues_parsing_deferred = 0;
4406		3	matroska_parse_cues(matroska);
4407			}
4408
4409	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 55 times.	55	if (!sti->nb_index_entries)
4410		✗	goto err;
4411		55	timestamp = FFMAX(timestamp, sti->index_entries[0].timestamp);
4412
4413	2/2 ✓ Branch 1 taken 45 times. ✓ Branch 2 taken 10 times.	55	if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4414	2/2 ✓ Branch 0 taken 17 times. ✓ Branch 1 taken 28 times.	45	index == sti->nb_index_entries - 1) {
4415		27	matroska_reset_status(matroska, 0, sti->index_entries[sti->nb_index_entries - 1].pos);
4416	2/2 ✓ Branch 1 taken 285 times. ✓ Branch 2 taken 410 times.	695	while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4417	2/2 ✓ Branch 0 taken 409 times. ✓ Branch 1 taken 1 times.	410	index == sti->nb_index_entries - 1) {
4418		694	matroska_clear_queue(matroska);
4419	2/2 ✓ Branch 1 taken 26 times. ✓ Branch 2 taken 668 times.	694	if (matroska_parse_cluster(matroska) < 0)
4420		26	break;
4421			}
4422			}
4423
4424		55	matroska_clear_queue(matroska);
4425	4/4 ✓ Branch 0 taken 45 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 3 times. ✓ Branch 3 taken 42 times.	55	if (index < 0 || (matroska->cues_parsing_deferred < 0 &&
4426	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	index == sti->nb_index_entries - 1))
4427		10	goto err;
4428
4429		45	tracks = matroska->tracks.elem;
4430	2/2 ✓ Branch 0 taken 69 times. ✓ Branch 1 taken 45 times.	114	for (i = 0; i < matroska->tracks.nb_elem; i++) {
4431		69	tracks[i].audio.pkt_cnt = 0;
4432		69	tracks[i].audio.sub_packet_cnt = 0;
4433		69	tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
4434		69	tracks[i].end_timecode = 0;
4435			}
4436
4437			/* We seek to a level 1 element, so set the appropriate status. */
4438		45	matroska_reset_status(matroska, 0, sti->index_entries[index].pos);
4439	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (flags & AVSEEK_FLAG_ANY) {
4440		✗	sti->skip_to_keyframe = 0;
4441		✗	matroska->skip_to_timecode = timestamp;
4442			} else {
4443		45	sti->skip_to_keyframe = 1;
4444		45	matroska->skip_to_timecode = sti->index_entries[index].timestamp;
4445			}
4446		45	matroska->skip_to_keyframe = 1;
4447		45	matroska->done = 0;
4448		45	avpriv_update_cur_dts(s, st, sti->index_entries[index].timestamp);
4449		45	return 0;
4450		10	err:
4451			// slightly hackish but allows proper fallback to
4452			// the generic seeking code.
4453		10	matroska_reset_status(matroska, 0, -1);
4454		10	matroska->resync_pos = -1;
4455		10	matroska_clear_queue(matroska);
4456		10	sti->skip_to_keyframe =
4457		10	matroska->skip_to_keyframe = 0;
4458		10	matroska->done = 0;
4459		10	return -1;
4460			}
4461
4462		372	static int matroska_read_close(AVFormatContext *s)
4463			{
4464		372	MatroskaDemuxContext *matroska = s->priv_data;
4465		372	MatroskaTrack *tracks = matroska->tracks.elem;
4466			int n;
4467
4468		372	matroska_clear_queue(matroska);
4469
4470	2/2 ✓ Branch 0 taken 447 times. ✓ Branch 1 taken 372 times.	819	for (n = 0; n < matroska->tracks.nb_elem; n++)
4471	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 363 times.	447	if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
4472		84	av_freep(&tracks[n].audio.buf);
4473		372	ebml_free(matroska_segment, matroska);
4474
4475		372	return 0;
4476			}
4477
4478			#if CONFIG_WEBM_DASH_MANIFEST_DEMUXER
4479			typedef struct {
4480			int64_t start_time_ns;
4481			int64_t end_time_ns;
4482			int64_t start_offset;
4483			int64_t end_offset;
4484			} CueDesc;
4485
4486			/* This function searches all the Cues and returns the CueDesc corresponding to
4487			* the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
4488			* end_time_ns. All 4 fields will be set to -1 if ts >= file's duration or
4489			* if an error occurred.
4490			*/
4491		4051	static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
4492		4051	MatroskaDemuxContext *matroska = s->priv_data;
4493		4051	FFStream *const sti = ffstream(s->streams[0]);
4494		4051	AVIndexEntry *const index_entries = sti->index_entries;
4495		4051	int nb_index_entries = sti->nb_index_entries;
4496			CueDesc cue_desc;
4497			int i;
4498
4499	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 3950 times.	4051	if (ts >= (int64_t)(matroska->duration * matroska->time_scale))
4500		101	return (CueDesc) {-1, -1, -1, -1};
4501	2/2 ✓ Branch 0 taken 45235 times. ✓ Branch 1 taken 156 times.	45391	for (i = 1; i < nb_index_entries; i++) {
4502	1/2 ✓ Branch 0 taken 45235 times. ✗ Branch 1 not taken.	45235	if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
4503	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 41441 times.	45235	index_entries[i].timestamp * matroska->time_scale > ts) {
4504		3794	break;
4505			}
4506			}
4507		3950	--i;
4508	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3950 times.	3950	if (index_entries[i].timestamp > matroska->duration)
4509		✗	return (CueDesc) {-1, -1, -1, -1};
4510		3950	cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
4511		3950	cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
4512	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 156 times.	3950	if (i != nb_index_entries - 1) {
4513		3794	cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
4514		3794	cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
4515			} else {
4516		156	cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
4517			// FIXME: this needs special handling for files where Cues appear
4518			// before Clusters. the current logic assumes Cues appear after
4519			// Clusters.
4520		156	cue_desc.end_offset = cues_start - matroska->segment_start;
4521			}
4522
4523	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3950 times.	3950	if (cue_desc.end_time_ns < cue_desc.start_time_ns)
4524		✗	return (CueDesc) {-1, -1, -1, -1};
4525
4526		3950	return cue_desc;
4527			}
4528
4529		10	static int webm_clusters_start_with_keyframe(AVFormatContext *s)
4530			{
4531		10	MatroskaDemuxContext *matroska = s->priv_data;
4532		10	AVStream *const st = s->streams[0];
4533		10	FFStream *const sti = ffstream(st);
4534		10	uint32_t id = matroska->current_id;
4535			int64_t cluster_pos, before_pos;
4536		10	int index, rv = 1;
4537
4538	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (sti->nb_index_entries <= 0)
4539		✗	return 0;
4540
4541			// seek to the first cluster using cues.
4542		10	index = av_index_search_timestamp(st, 0, 0);
4543	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (index < 0)
4544		✗	return 0;
4545		10	cluster_pos = sti->index_entries[index].pos;
4546		10	before_pos = avio_tell(s->pb);
4547		78	while (1) {
4548			uint64_t cluster_id, cluster_length;
4549			int read;
4550			AVPacket *pkt;
4551		88	avio_seek(s->pb, cluster_pos, SEEK_SET);
4552			// read cluster id and length
4553		88	read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
4554	3/4 ✓ Branch 0 taken 88 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 79 times. ✓ Branch 3 taken 9 times.	88	if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
4555			break;
4556		79	read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
4557	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 79 times.	79	if (read < 0)
4558		✗	break;
4559
4560		79	matroska_reset_status(matroska, 0, cluster_pos);
4561		79	matroska_clear_queue(matroska);
4562	1/2 ✓ Branch 1 taken 79 times. ✗ Branch 2 not taken.	79	if (matroska_parse_cluster(matroska) < 0 ||
4563	1/2 ✓ Branch 0 taken 79 times. ✗ Branch 1 not taken.	79	!matroska->queue.head) {
4564			break;
4565			}
4566		79	pkt = &matroska->queue.head->pkt;
4567			// 4 + read is the length of the cluster id and the cluster length field.
4568		79	cluster_pos += 4 + read + cluster_length;
4569	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 78 times.	79	if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
4570		1	rv = 0;
4571		1	break;
4572			}
4573			}
4574
4575			/* Restore the status after matroska_read_header: */
4576		10	matroska_reset_status(matroska, id, before_pos);
4577
4578		10	return rv;
4579			}
4580
4581		555	static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
4582			double min_buffer, double* buffer,
4583			double* sec_to_download, AVFormatContext *s,
4584			int64_t cues_start)
4585			{
4586		555	double nano_seconds_per_second = 1000000000.0;
4587		555	double time_sec = time_ns / nano_seconds_per_second;
4588		555	int rv = 0;
4589		555	int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
4590		555	int64_t end_time_ns = time_ns + time_to_search_ns;
4591		555	double sec_downloaded = 0.0;
4592		555	CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
4593	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (desc_curr.start_time_ns == -1)
4594		✗	return -1;
4595		555	*sec_to_download = 0.0;
4596
4597			// Check for non cue start time.
4598	2/2 ✓ Branch 0 taken 513 times. ✓ Branch 1 taken 42 times.	555	if (time_ns > desc_curr.start_time_ns) {
4599		513	int64_t cue_nano = desc_curr.end_time_ns - time_ns;
4600		513	double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
4601		513	double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
4602		513	double timeToDownload = (cueBytes * 8.0) / bps;
4603
4604		513	sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
4605		513	*sec_to_download += timeToDownload;
4606
4607			// Check if the search ends within the first cue.
4608	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 513 times.	513	if (desc_curr.end_time_ns >= end_time_ns) {
4609		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4610		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4611		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4612		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4613			}
4614
4615	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 509 times.	513	if ((sec_downloaded + *buffer) <= min_buffer) {
4616		4	return 1;
4617			}
4618
4619			// Get the next Cue.
4620		509	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4621			}
4622
4623	2/2 ✓ Branch 0 taken 2856 times. ✓ Branch 1 taken 100 times.	2956	while (desc_curr.start_time_ns != -1) {
4624		2856	int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
4625		2856	int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
4626		2856	double desc_sec = desc_ns / nano_seconds_per_second;
4627		2856	double bits = (desc_bytes * 8.0);
4628		2856	double time_to_download = bits / bps;
4629
4630		2856	sec_downloaded += desc_sec - time_to_download;
4631		2856	*sec_to_download += time_to_download;
4632
4633	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2856 times.	2856	if (desc_curr.end_time_ns >= end_time_ns) {
4634		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4635		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4636		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4637		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4638
4639		✗	if ((sec_downloaded + *buffer) <= min_buffer)
4640		✗	rv = 1;
4641		✗	break;
4642			}
4643
4644	2/2 ✓ Branch 0 taken 451 times. ✓ Branch 1 taken 2405 times.	2856	if ((sec_downloaded + *buffer) <= min_buffer) {
4645		451	rv = 1;
4646		451	break;
4647			}
4648
4649		2405	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4650			}
4651		551	*buffer = *buffer + sec_downloaded;
4652		551	return rv;
4653			}
4654
4655			/* This function computes the bandwidth of the WebM file with the help of
4656			* buffer_size_after_time_downloaded() function. Both of these functions are
4657			* adapted from WebM Tools project and are adapted to work with FFmpeg's
4658			* Matroska parsing mechanism.
4659			*
4660			* Returns the bandwidth of the file on success; -1 on error.
4661			* */
4662		10	static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4663			{
4664		10	MatroskaDemuxContext *matroska = s->priv_data;
4665		10	AVStream *st = s->streams[0];
4666		10	FFStream *const sti = ffstream(st);
4667		10	double bandwidth = 0.0;
4668
4669	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int i = 0; i < sti->nb_index_entries; i++) {
4670		101	int64_t prebuffer_ns = 1000000000;
4671		101	int64_t time_ns = sti->index_entries[i].timestamp * matroska->time_scale;
4672		101	double nano_seconds_per_second = 1000000000.0;
4673			int64_t prebuffered_ns;
4674		101	double prebuffer_bytes = 0.0;
4675		101	int64_t temp_prebuffer_ns = prebuffer_ns;
4676			int64_t pre_bytes, pre_ns;
4677			double pre_sec, prebuffer, bits_per_second;
4678		101	CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4679			// Start with the first Cue.
4680		101	CueDesc desc_end = desc_beg;
4681
4682	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 101 times.	101	if (time_ns > INT64_MAX - prebuffer_ns)
4683		✗	return -1;
4684		101	prebuffered_ns = time_ns + prebuffer_ns;
4685
4686			// Figure out how much data we have downloaded for the prebuffer. This will
4687			// be used later to adjust the bits per sample to try.
4688	4/4 ✓ Branch 0 taken 121 times. ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 21 times. ✓ Branch 3 taken 100 times.	122	while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
4689			// Prebuffered the entire Cue.
4690		21	prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4691		21	temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4692		21	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4693			}
4694	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 100 times.	101	if (desc_end.start_time_ns == -1) {
4695			// The prebuffer is larger than the duration.
4696	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4697		✗	return -1;
4698		1	bits_per_second = 0.0;
4699			} else {
4700			// The prebuffer ends in the last Cue. Estimate how much data was
4701			// prebuffered.
4702		100	pre_bytes = desc_end.end_offset - desc_end.start_offset;
4703	1/2 ✓ Branch 0 taken 100 times. ✗ Branch 1 not taken.	100	if (desc_end.end_time_ns <= desc_end.start_time_ns ||
4704	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 100 times.	100	desc_end.end_time_ns - (uint64_t)desc_end.start_time_ns > INT64_MAX)
4705		✗	return -1;
4706		100	pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4707		100	pre_sec = pre_ns / nano_seconds_per_second;
4708		100	prebuffer_bytes +=
4709		100	pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4710
4711		100	prebuffer = prebuffer_ns / nano_seconds_per_second;
4712
4713			// Set this to 0.0 in case our prebuffer buffers the entire video.
4714		100	bits_per_second = 0.0;
4715			do {
4716		560	int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4717		560	int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4718			double desc_sec, calc_bits_per_second, percent, mod_bits_per_second;
4719	2/4 ✓ Branch 0 taken 560 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 560 times.	560	if (desc_bytes <= 0 || desc_bytes > INT64_MAX/8)
4720		✗	return -1;
4721
4722		560	desc_sec = desc_ns / nano_seconds_per_second;
4723		560	calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4724
4725			// Drop the bps by the percentage of bytes buffered.
4726		560	percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4727		560	mod_bits_per_second = calc_bits_per_second * percent;
4728
4729	2/2 ✓ Branch 0 taken 555 times. ✓ Branch 1 taken 5 times.	560	if (prebuffer < desc_sec) {
4730		555	double search_sec =
4731		555	(double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4732
4733			// Add 1 so the bits per second should be a little bit greater than file
4734			// datarate.
4735		555	int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4736		555	const double min_buffer = 0.0;
4737		555	double buffer = prebuffer;
4738		555	double sec_to_download = 0.0;
4739
4740		555	int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4741			min_buffer, &buffer, &sec_to_download,
4742			s, cues_start);
4743	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (rv < 0) {
4744		✗	return -1;
4745	2/2 ✓ Branch 0 taken 100 times. ✓ Branch 1 taken 455 times.	555	} else if (rv == 0) {
4746		100	bits_per_second = (double)(bps);
4747		100	break;
4748			}
4749			}
4750
4751		460	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4752	1/2 ✓ Branch 0 taken 460 times. ✗ Branch 1 not taken.	460	} while (desc_end.start_time_ns != -1);
4753			}
4754	2/2 ✓ Branch 0 taken 38 times. ✓ Branch 1 taken 63 times.	101	if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4755			}
4756		10	return (int64_t)bandwidth;
4757			}
4758
4759		10	static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4760			{
4761		10	MatroskaDemuxContext *matroska = s->priv_data;
4762		10	EbmlList *seekhead_list = &matroska->seekhead;
4763		10	MatroskaSeekhead *seekhead = seekhead_list->elem;
4764		10	AVStream *const st = s->streams[0];
4765		10	FFStream *const sti = ffstream(st);
4766			AVBPrint bprint;
4767			char *buf;
4768		10	int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4769			int i;
4770			int ret;
4771
4772			// determine cues start and end positions
4773	1/2 ✓ Branch 0 taken 34 times. ✗ Branch 1 not taken.	34	for (i = 0; i < seekhead_list->nb_elem; i++)
4774	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 24 times.	34	if (seekhead[i].id == MATROSKA_ID_CUES)
4775		10	break;
4776
4777	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (i >= seekhead_list->nb_elem) return -1;
4778
4779		10	before_pos = avio_tell(matroska->ctx->pb);
4780		10	cues_start = seekhead[i].pos + matroska->segment_start;
4781	1/2 ✓ Branch 1 taken 10 times. ✗ Branch 2 not taken.	10	if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4782			// cues_end is computed as cues_start + cues_length + length of the
4783			// Cues element ID (i.e. 4) + EBML length of the Cues element.
4784			// cues_end is inclusive and the above sum is reduced by 1.
4785			uint64_t cues_length, cues_id;
4786			int bytes_read;
4787		10	bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4788	2/4 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 10 times.	10	if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
4789		✗	return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4790		10	bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4791	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (bytes_read < 0)
4792		✗	return bytes_read;
4793		10	cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4794			}
4795		10	avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4796	2/4 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 10 times.	10	if (cues_start == -1 || cues_end == -1) return -1;
4797
4798			// parse the cues
4799		10	matroska_parse_cues(matroska);
4800
4801	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (!sti->nb_index_entries)
4802		✗	return AVERROR_INVALIDDATA;
4803
4804			// cues start
4805		10	av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4806
4807			// cues end
4808		10	av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4809
4810			// if the file has cues at the start, fix up the init range so that
4811			// it does not include it
4812	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (cues_start <= init_range)
4813		✗	av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4814
4815			// bandwidth
4816		10	bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4817	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (bandwidth < 0) return -1;
4818		10	av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4819
4820			// check if all clusters start with key frames
4821		10	av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
4822
4823			// Store cue point timestamps as a comma separated list
4824			// for checking subsegment alignment in the muxer.
4825		10	av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
4826	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int j = 0; j < sti->nb_index_entries; j++)
4827		101	av_bprintf(&bprint, "%" PRId64",", sti->index_entries[j].timestamp);
4828	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 10 times.	10	if (!av_bprint_is_complete(&bprint)) {
4829		✗	av_bprint_finalize(&bprint, NULL);
4830		✗	return AVERROR(ENOMEM);
4831			}
4832			// Remove the trailing ','
4833		10	bprint.str[--bprint.len] = '\0';
4834	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 10 times.	10	if ((ret = av_bprint_finalize(&bprint, &buf)) < 0)
4835		✗	return ret;
4836		10	av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS,
4837			buf, AV_DICT_DONT_STRDUP_VAL);
4838
4839		10	return 0;
4840			}
4841
4842		14	static int webm_dash_manifest_read_header(AVFormatContext *s)
4843			{
4844			char *buf;
4845		14	int ret = matroska_read_header(s);
4846			int64_t init_range;
4847			MatroskaTrack *tracks;
4848		14	MatroskaDemuxContext *matroska = s->priv_data;
4849	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (ret) {
4850		✗	av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4851		✗	return -1;
4852			}
4853	2/4 ✓ Branch 0 taken 14 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 14 times.	14	if (!matroska->tracks.nb_elem || !s->nb_streams) {
4854		✗	av_log(s, AV_LOG_ERROR, "No track found\n");
4855		✗	return AVERROR_INVALIDDATA;
4856			}
4857
4858	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 4 times.	14	if (!matroska->is_live) {
4859		10	buf = av_asprintf("%g", matroska->duration);
4860	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (!buf)
4861		✗	return AVERROR(ENOMEM);
4862		10	av_dict_set(&s->streams[0]->metadata, DURATION,
4863			buf, AV_DICT_DONT_STRDUP_VAL);
4864
4865			// initialization range
4866			// 5 is the offset of Cluster ID.
4867		10	init_range = avio_tell(s->pb) - 5;
4868		10	av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4869			}
4870
4871			// basename of the file
4872		14	buf = strrchr(s->url, '/');
4873	1/2 ✓ Branch 0 taken 14 times. ✗ Branch 1 not taken.	14	av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4874
4875			// track number
4876		14	tracks = matroska->tracks.elem;
4877		14	av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4878
4879			// parse the cues and populate Cue related fields
4880	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 4 times.	14	if (!matroska->is_live) {
4881		10	ret = webm_dash_manifest_cues(s, init_range);
4882	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (ret < 0) {
4883		✗	av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4884		✗	return ret;
4885			}
4886			}
4887
4888			// use the bandwidth from the command line if it was provided
4889	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 12 times.	14	if (matroska->bandwidth > 0) {
4890		2	av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4891		2	matroska->bandwidth, 0);
4892			}
4893		14	return 0;
4894			}
4895
4896		28	static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4897			{
4898		28	return AVERROR_EOF;
4899			}
4900
4901			#define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4902			static const AVOption options[] = {
4903			{ "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
4904			{ "bandwidth", "bandwidth of this stream to be specified in the DASH manifest.", OFFSET(bandwidth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
4905			{ NULL },
4906			};
4907
4908			static const AVClass webm_dash_class = {
4909			.class_name = "WebM DASH Manifest demuxer",
4910			.item_name = av_default_item_name,
4911			.option = options,
4912			.version = LIBAVUTIL_VERSION_INT,
4913			};
4914
4915			const FFInputFormat ff_webm_dash_manifest_demuxer = {
4916			.p.name = "webm_dash_manifest",
4917			.p.long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4918			.p.priv_class = &webm_dash_class,
4919			.priv_data_size = sizeof(MatroskaDemuxContext),
4920			.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
4921			.read_header = webm_dash_manifest_read_header,
4922			.read_packet = webm_dash_manifest_read_packet,
4923			.read_close = matroska_read_close,
4924			};
4925			#endif
4926
4927			const FFInputFormat ff_matroska_demuxer = {
4928			.p.name = "matroska,webm",
4929			.p.long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4930			.p.extensions = "mkv,mk3d,mka,mks,webm",
4931			.p.mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska",
4932			.priv_data_size = sizeof(MatroskaDemuxContext),
4933			.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
4934			.read_probe = matroska_probe,
4935			.read_header = matroska_read_header,
4936			.read_packet = matroska_read_packet,
4937			.read_close = matroska_read_close,
4938			.read_seek = matroska_read_seek,
4939			};
4940