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/avstring.h"
38			#include "libavutil/base64.h"
39			#include "libavutil/bprint.h"
40			#include "libavutil/dict.h"
41			#include "libavutil/display.h"
42			#include "libavutil/hdr_dynamic_metadata.h"
43			#include "libavutil/intfloat.h"
44			#include "libavutil/intreadwrite.h"
45			#include "libavutil/lzo.h"
46			#include "libavutil/mastering_display_metadata.h"
47			#include "libavutil/mathematics.h"
48			#include "libavutil/mem.h"
49			#include "libavutil/opt.h"
50			#include "libavutil/pixdesc.h"
51			#include "libavutil/time_internal.h"
52			#include "libavutil/spherical.h"
53
54			#include "libavcodec/bytestream.h"
55			#include "libavcodec/defs.h"
56			#include "libavcodec/flac.h"
57			#include "libavcodec/itut35.h"
58			#include "libavcodec/mpeg4audio.h"
59			#include "libavcodec/packet_internal.h"
60
61			#include "avformat.h"
62			#include "avio_internal.h"
63			#include "demux.h"
64			#include "dovi_isom.h"
65			#include "internal.h"
66			#include "isom.h"
67			#include "matroska.h"
68			#include "oggdec.h"
69			/* For ff_codec_get_id(). */
70			#include "riff.h"
71			#include "rmsipr.h"
72
73			#if CONFIG_BZLIB
74			#include <bzlib.h>
75			#endif
76			#if CONFIG_ZLIB
77			#include <zlib.h>
78			#endif
79
80			#include "qtpalette.h"
81
82			#define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
83			#define NEEDS_CHECKING 2 /* Indicates that some error checks
84			* still need to be performed */
85			#define LEVEL_ENDED 3 /* return value of ebml_parse when the
86			* syntax level used for parsing ended. */
87			#define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
88			* of unknown, potentially damaged data is encountered,
89			* it is considered an error. */
90			#define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
91			* to this many bytes of unknown data for the
92			* SKIP_THRESHOLD check. */
93
94			typedef enum {
95			EBML_NONE,
96			EBML_UINT,
97			EBML_SINT,
98			EBML_FLOAT,
99			EBML_STR,
100			EBML_UTF8,
101			EBML_BIN,
102			EBML_NEST,
103			EBML_LEVEL1,
104			EBML_STOP,
105			EBML_TYPE_COUNT
106			} EbmlType;
107
108			typedef struct CountedElement {
109			union {
110			uint64_t u;
111			int64_t i;
112			double f;
113			char *s;
114			} el;
115			unsigned count;
116			} CountedElement;
117
118			typedef const struct EbmlSyntax {
119			uint32_t id;
120			uint8_t type;
121			uint8_t is_counted;
122			size_t list_elem_size;
123			size_t data_offset;
124			union {
125			int64_t i;
126			uint64_t u;
127			double f;
128			const char *s;
129			const struct EbmlSyntax *n;
130			} def;
131			} EbmlSyntax;
132
133			typedef struct EbmlList {
134			int nb_elem;
135			unsigned int alloc_elem_size;
136			void *elem;
137			} EbmlList;
138
139			typedef struct EbmlBin {
140			int size;
141			AVBufferRef *buf;
142			uint8_t *data;
143			int64_t pos;
144			} EbmlBin;
145
146			typedef struct Ebml {
147			uint64_t version;
148			uint64_t max_size;
149			uint64_t id_length;
150			char *doctype;
151			uint64_t doctype_version;
152			} Ebml;
153
154			typedef struct MatroskaTrackCompression {
155			uint64_t algo;
156			EbmlBin settings;
157			} MatroskaTrackCompression;
158
159			typedef struct MatroskaTrackEncryption {
160			uint64_t algo;
161			EbmlBin key_id;
162			} MatroskaTrackEncryption;
163
164			typedef struct MatroskaTrackEncoding {
165			uint64_t scope;
166			uint64_t type;
167			MatroskaTrackCompression compression;
168			MatroskaTrackEncryption encryption;
169			} MatroskaTrackEncoding;
170
171			typedef struct MatroskaMasteringMeta {
172			double r_x;
173			double r_y;
174			double g_x;
175			double g_y;
176			double b_x;
177			double b_y;
178			double white_x;
179			double white_y;
180			double max_luminance;
181			CountedElement min_luminance;
182			} MatroskaMasteringMeta;
183
184			typedef struct MatroskaTrackVideoColor {
185			uint64_t matrix_coefficients;
186			uint64_t bits_per_channel;
187			uint64_t chroma_sub_horz;
188			uint64_t chroma_sub_vert;
189			uint64_t cb_sub_horz;
190			uint64_t cb_sub_vert;
191			uint64_t chroma_siting_horz;
192			uint64_t chroma_siting_vert;
193			uint64_t range;
194			uint64_t transfer_characteristics;
195			uint64_t primaries;
196			uint64_t max_cll;
197			uint64_t max_fall;
198			MatroskaMasteringMeta mastering_meta;
199			} MatroskaTrackVideoColor;
200
201			typedef struct MatroskaTrackVideoProjection {
202			uint64_t type;
203			EbmlBin private;
204			double yaw;
205			double pitch;
206			double roll;
207			} MatroskaTrackVideoProjection;
208
209			typedef struct MatroskaTrackVideo {
210			double frame_rate;
211			uint64_t display_width;
212			uint64_t display_height;
213			uint64_t pixel_width;
214			uint64_t pixel_height;
215			uint64_t cropped_width;
216			uint64_t cropped_height;
217			EbmlBin color_space;
218			uint64_t pixel_cropt;
219			uint64_t pixel_cropl;
220			uint64_t pixel_cropb;
221			uint64_t pixel_cropr;
222			uint64_t display_unit;
223			uint64_t interlaced;
224			uint64_t field_order;
225			uint64_t stereo_mode;
226			uint64_t alpha_mode;
227			EbmlList color;
228			MatroskaTrackVideoProjection projection;
229			} MatroskaTrackVideo;
230
231			typedef struct MatroskaTrackAudio {
232			double samplerate;
233			double out_samplerate;
234			uint64_t bitdepth;
235			uint64_t channels;
236
237			/* real audio header (extracted from extradata) */
238			int coded_framesize;
239			int sub_packet_h;
240			int frame_size;
241			int sub_packet_size;
242			int sub_packet_cnt;
243			int pkt_cnt;
244			uint64_t buf_timecode;
245			uint8_t *buf;
246			} MatroskaTrackAudio;
247
248			typedef struct MatroskaTrackPlane {
249			uint64_t uid;
250			uint64_t type;
251			} MatroskaTrackPlane;
252
253			typedef struct MatroskaTrackOperation {
254			EbmlList combine_planes;
255			} MatroskaTrackOperation;
256
257			typedef struct MatroskaBlockAdditionMapping {
258			uint64_t value;
259			char *name;
260			uint64_t type;
261			EbmlBin extradata;
262			} MatroskaBlockAdditionMapping;
263
264			typedef struct MatroskaTrack {
265			uint64_t num;
266			uint64_t uid;
267			uint64_t type;
268			char *name;
269			char *codec_id;
270			EbmlBin codec_priv;
271			char *language;
272			double time_scale;
273			uint64_t default_duration;
274			uint64_t flag_default;
275			uint64_t flag_forced;
276			uint64_t flag_comment;
277			uint64_t flag_hearingimpaired;
278			uint64_t flag_visualimpaired;
279			uint64_t flag_textdescriptions;
280			CountedElement flag_original;
281			uint64_t seek_preroll;
282			MatroskaTrackVideo video;
283			MatroskaTrackAudio audio;
284			MatroskaTrackOperation operation;
285			EbmlList encodings;
286			uint64_t codec_delay;
287			uint64_t codec_delay_in_track_tb;
288
289			AVStream *stream;
290			int64_t end_timecode;
291			int ms_compat;
292			int needs_decoding;
293			uint64_t max_block_additional_id;
294			EbmlList block_addition_mappings;
295
296			uint32_t palette[AVPALETTE_COUNT];
297			int has_palette;
298			} MatroskaTrack;
299
300			typedef struct MatroskaAttachment {
301			uint64_t uid;
302			char *filename;
303			char *description;
304			char *mime;
305			EbmlBin bin;
306
307			AVStream *stream;
308			} MatroskaAttachment;
309
310			typedef struct MatroskaChapter {
311			uint64_t start;
312			uint64_t end;
313			uint64_t uid;
314			char *title;
315
316			AVChapter *chapter;
317			} MatroskaChapter;
318
319			typedef struct MatroskaIndexPos {
320			uint64_t track;
321			uint64_t pos;
322			} MatroskaIndexPos;
323
324			typedef struct MatroskaIndex {
325			uint64_t time;
326			EbmlList pos;
327			} MatroskaIndex;
328
329			typedef struct MatroskaTag {
330			char *name;
331			char *string;
332			char *lang;
333			uint64_t def;
334			EbmlList sub;
335			} MatroskaTag;
336
337			typedef struct MatroskaTagTarget {
338			char *type;
339			uint64_t typevalue;
340			uint64_t trackuid;
341			uint64_t chapteruid;
342			uint64_t attachuid;
343			} MatroskaTagTarget;
344
345			typedef struct MatroskaTags {
346			MatroskaTagTarget target;
347			EbmlList tag;
348			} MatroskaTags;
349
350			typedef struct MatroskaSeekhead {
351			uint64_t id;
352			uint64_t pos;
353			} MatroskaSeekhead;
354
355			typedef struct MatroskaLevel {
356			uint64_t start;
357			uint64_t length;
358			} MatroskaLevel;
359
360			typedef struct MatroskaBlockMore {
361			uint64_t additional_id;
362			EbmlBin additional;
363			} MatroskaBlockMore;
364
365			typedef struct MatroskaBlock {
366			uint64_t duration;
367			CountedElement reference;
368			uint64_t non_simple;
369			EbmlBin bin;
370			EbmlList blockmore;
371			int64_t discard_padding;
372			} MatroskaBlock;
373
374			typedef struct MatroskaCluster {
375			MatroskaBlock block;
376			uint64_t timecode;
377			int64_t pos;
378			} MatroskaCluster;
379
380			typedef struct MatroskaLevel1Element {
381			int64_t pos;
382			uint32_t id;
383			int parsed;
384			} MatroskaLevel1Element;
385
386			typedef struct MatroskaDemuxContext {
387			const AVClass *class;
388			AVFormatContext *ctx;
389
390			/* EBML stuff */
391			MatroskaLevel levels[EBML_MAX_DEPTH];
392			int num_levels;
393			uint32_t current_id;
394			int64_t resync_pos;
395			int unknown_count;
396
397			uint64_t time_scale;
398			double duration;
399			char *title;
400			char *muxingapp;
401			EbmlBin date_utc;
402			EbmlList tracks;
403			EbmlList attachments;
404			EbmlList chapters;
405			EbmlList index;
406			EbmlList tags;
407			EbmlList seekhead;
408
409			/* byte position of the segment inside the stream */
410			int64_t segment_start;
411
412			/* This packet coincides with FFFormatContext.parse_pkt
413			* and is not owned by us. */
414			AVPacket *pkt;
415
416			/* the packet queue */
417			PacketList queue;
418
419			int done;
420
421			/* What to skip before effectively reading a packet. */
422			int skip_to_keyframe;
423			uint64_t skip_to_timecode;
424
425			/* File has a CUES element, but we defer parsing until it is needed. */
426			int cues_parsing_deferred;
427
428			/* Level1 elements and whether they were read yet */
429			MatroskaLevel1Element level1_elems[64];
430			int num_level1_elems;
431
432			MatroskaCluster current_cluster;
433
434			int is_webm;
435
436			/* WebM DASH Manifest live flag */
437			int is_live;
438
439			/* Bandwidth value for WebM DASH Manifest */
440			int bandwidth;
441			} MatroskaDemuxContext;
442
443			#define CHILD_OF(parent) { .def = { .n = parent } }
444
445			// The following forward declarations need their size because
446			// a tentative definition with internal linkage must not be an
447			// incomplete type (6.7.2 in C90, 6.9.2 in C99).
448			// Removing the sizes breaks MSVC.
449			static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
450			matroska_track[33], matroska_track_encoding[6], matroska_track_encodings[2],
451			matroska_track_combine_planes[2], matroska_track_operation[2], matroska_block_addition_mapping[5], matroska_tracks[2],
452			matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
453			matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
454			matroska_blockadditions[2], matroska_blockgroup[8], matroska_cluster_parsing[8];
455
456			static EbmlSyntax ebml_header[] = {
457			{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
458			{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, 0, offsetof(Ebml, max_size), { .u = 8 } },
459			{ EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, 0, offsetof(Ebml, id_length), { .u = 4 } },
460			{ EBML_ID_DOCTYPE, EBML_STR, 0, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
461			{ EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
462			{ EBML_ID_EBMLVERSION, EBML_NONE },
463			{ EBML_ID_DOCTYPEVERSION, EBML_NONE },
464			CHILD_OF(ebml_syntax)
465			};
466
467			static EbmlSyntax ebml_syntax[] = {
468			{ EBML_ID_HEADER, EBML_NEST, 0, 0, 0, { .n = ebml_header } },
469			{ MATROSKA_ID_SEGMENT, EBML_STOP },
470			{ 0 }
471			};
472
473			static EbmlSyntax matroska_info[] = {
474			{ MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
475			{ MATROSKA_ID_DURATION, EBML_FLOAT, 0, 0, offsetof(MatroskaDemuxContext, duration) },
476			{ MATROSKA_ID_TITLE, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, title) },
477			{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
478			{ MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, muxingapp) },
479			{ MATROSKA_ID_DATEUTC, EBML_BIN, 0, 0, offsetof(MatroskaDemuxContext, date_utc) },
480			{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
481			CHILD_OF(matroska_segment)
482			};
483
484			static EbmlSyntax matroska_mastering_meta[] = {
485			{ MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_x) },
486			{ MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_y) },
487			{ MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_x) },
488			{ MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_y) },
489			{ MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_x) },
490			{ MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_y) },
491			{ MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_x) },
492			{ MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_y) },
493			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 1, 0, offsetof(MatroskaMasteringMeta, min_luminance) },
494			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, max_luminance) },
495			CHILD_OF(matroska_track_video_color)
496			};
497
498			static EbmlSyntax matroska_track_video_color[] = {
499			{ MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
500			{ MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u = 0 } },
501			{ MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz) },
502			{ MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert) },
503			{ MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz) },
504			{ MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert) },
505			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
506			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
507			{ MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
508			{ MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
509			{ MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
510			{ MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_cll) },
511			{ MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_fall) },
512			{ MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
513			CHILD_OF(matroska_track_video)
514			};
515
516			static EbmlSyntax matroska_track_video_projection[] = {
517			{ MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
518			{ MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideoProjection, private) },
519			{ MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f = 0.0 } },
520			{ MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f = 0.0 } },
521			{ MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f = 0.0 } },
522			CHILD_OF(matroska_track_video)
523			};
524
525			static EbmlSyntax matroska_track_video[] = {
526			{ MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideo, frame_rate) },
527			{ MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
528			{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
529			{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_width) },
530			{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_height) },
531			{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideo, color_space) },
532			{ MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, alpha_mode), { .u = 0 } },
533			{ MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
534			{ MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
535			{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropb), {.u = 0 } },
536			{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropt), {.u = 0 } },
537			{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropl), {.u = 0 } },
538			{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropr), {.u = 0 } },
539			{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
540			{ MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
541			{ MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
542			{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
543			{ MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
544			CHILD_OF(matroska_track)
545			};
546
547			static EbmlSyntax matroska_track_audio[] = {
548			{ MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
549			{ MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
550			{ MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, bitdepth) },
551			{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
552			CHILD_OF(matroska_track)
553			};
554
555			static EbmlSyntax matroska_track_encoding_compression[] = {
556			{ MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackCompression, algo), { .u = MATROSKA_TRACK_ENCODING_COMP_ZLIB } },
557			{ MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, 0, offsetof(MatroskaTrackCompression, settings) },
558			CHILD_OF(matroska_track_encoding)
559			};
560
561			static EbmlSyntax matroska_track_encoding_encryption[] = {
562			{ MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
563			{ MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, 0, offsetof(MatroskaTrackEncryption,key_id) },
564			{ MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
565			{ MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
566			{ MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
567			{ MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
568			{ MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
569			CHILD_OF(matroska_track_encoding)
570			};
571			static EbmlSyntax matroska_track_encoding[] = {
572			{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
573			{ MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
574			{ MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
575			{ MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
576			{ MATROSKA_ID_ENCODINGORDER, EBML_NONE },
577			CHILD_OF(matroska_track_encodings)
578			};
579
580			static EbmlSyntax matroska_track_encodings[] = {
581			{ MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, 0, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
582			CHILD_OF(matroska_track)
583			};
584
585			static EbmlSyntax matroska_track_plane[] = {
586			{ MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,uid) },
587			{ MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,type) },
588			CHILD_OF(matroska_track_combine_planes)
589			};
590
591			static EbmlSyntax matroska_track_combine_planes[] = {
592			{ MATROSKA_ID_TRACKPLANE, EBML_NEST, 0, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
593			CHILD_OF(matroska_track_operation)
594			};
595
596			static EbmlSyntax matroska_track_operation[] = {
597			{ MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, 0, {.n = matroska_track_combine_planes} },
598			CHILD_OF(matroska_track)
599			};
600
601			static EbmlSyntax matroska_block_addition_mapping[] = {
602			{ MATROSKA_ID_BLKADDIDVALUE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, value) },
603			{ MATROSKA_ID_BLKADDIDNAME, EBML_STR, 0, 0, offsetof(MatroskaBlockAdditionMapping, name) },
604			{ MATROSKA_ID_BLKADDIDTYPE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, type), { .u = MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT } },
605			{ MATROSKA_ID_BLKADDIDEXTRADATA, EBML_BIN, 0, 0, offsetof(MatroskaBlockAdditionMapping, extradata) },
606			CHILD_OF(matroska_track)
607			};
608
609			static EbmlSyntax matroska_track[] = {
610			{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, 0, offsetof(MatroskaTrack, num) },
611			{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTrack, name) },
612			{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, uid) },
613			{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrack, type) },
614			{ MATROSKA_ID_CODECID, EBML_STR, 0, 0, offsetof(MatroskaTrack, codec_id) },
615			{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrack, codec_priv) },
616			{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, codec_delay), { .u = 0 } },
617			{ MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
618			{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
619			{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
620			{ MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
621			{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
622			{ MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
623			{ MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_hearingimpaired), { .u = 0 } },
624			{ MATROSKA_ID_TRACKFLAGVISUALIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_visualimpaired), { .u = 0 } },
625			{ MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_textdescriptions), { .u = 0 } },
626			{ MATROSKA_ID_TRACKFLAGORIGINAL, EBML_UINT, 1, 0, offsetof(MatroskaTrack, flag_original), {.u = 0 } },
627			{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
628			{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
629			{ MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
630			{ MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, 0, { .n = matroska_track_encodings } },
631			{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, max_block_additional_id), { .u = 0 } },
632			{ MATROSKA_ID_TRACKBLKADDMAPPING, EBML_NEST, 0, sizeof(MatroskaBlockAdditionMapping), offsetof(MatroskaTrack, block_addition_mappings), { .n = matroska_block_addition_mapping } },
633			{ MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, 0, offsetof(MatroskaTrack, seek_preroll), { .u = 0 } },
634			{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
635			{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
636			{ MATROSKA_ID_CODECNAME, EBML_NONE },
637			{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
638			{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
639			{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
640			{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
641			{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
642			CHILD_OF(matroska_tracks)
643			};
644
645			static EbmlSyntax matroska_tracks[] = {
646			{ MATROSKA_ID_TRACKENTRY, EBML_NEST, 0, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
647			CHILD_OF(matroska_segment)
648			};
649
650			static EbmlSyntax matroska_attachment[] = {
651			{ MATROSKA_ID_FILEUID, EBML_UINT, 0, 0, offsetof(MatroskaAttachment, uid) },
652			{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, filename) },
653			{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, 0, offsetof(MatroskaAttachment, mime) },
654			{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, 0, offsetof(MatroskaAttachment, bin) },
655			{ MATROSKA_ID_FILEDESC, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, description) },
656			CHILD_OF(matroska_attachments)
657			};
658
659			static EbmlSyntax matroska_attachments[] = {
660			{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, 0, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
661			CHILD_OF(matroska_segment)
662			};
663
664			static EbmlSyntax matroska_chapter_display[] = {
665			{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaChapter, title) },
666			{ MATROSKA_ID_CHAPLANG, EBML_NONE },
667			{ MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
668			CHILD_OF(matroska_chapter_entry)
669			};
670
671			static EbmlSyntax matroska_chapter_entry[] = {
672			{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
673			{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
674			{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaChapter, uid) },
675			{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter_display } },
676			{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
677			{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
678			{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
679			{ MATROSKA_ID_CHAPTERATOM, EBML_NONE },
680			CHILD_OF(matroska_chapter)
681			};
682
683			static EbmlSyntax matroska_chapter[] = {
684			{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, 0, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
685			{ MATROSKA_ID_EDITIONUID, EBML_NONE },
686			{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
687			{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
688			{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
689			CHILD_OF(matroska_chapters)
690			};
691
692			static EbmlSyntax matroska_chapters[] = {
693			{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter } },
694			CHILD_OF(matroska_segment)
695			};
696
697			static EbmlSyntax matroska_index_pos[] = {
698			{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, track) },
699			{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, pos) },
700			{ MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
701			{ MATROSKA_ID_CUEDURATION, EBML_NONE },
702			{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
703			CHILD_OF(matroska_index_entry)
704			};
705
706			static EbmlSyntax matroska_index_entry[] = {
707			{ MATROSKA_ID_CUETIME, EBML_UINT, 0, 0, offsetof(MatroskaIndex, time) },
708			{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, 0, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
709			CHILD_OF(matroska_index)
710			};
711
712			static EbmlSyntax matroska_index[] = {
713			{ MATROSKA_ID_POINTENTRY, EBML_NEST, 0, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
714			CHILD_OF(matroska_segment)
715			};
716
717			static EbmlSyntax matroska_simpletag[] = {
718			{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTag, name) },
719			{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaTag, string) },
720			{ MATROSKA_ID_TAGLANG, EBML_STR, 0, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
721			{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
722			{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
723			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
724			CHILD_OF(matroska_tag)
725			};
726
727			static EbmlSyntax matroska_tagtargets[] = {
728			{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, 0, offsetof(MatroskaTagTarget, type) },
729			{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
730			{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, trackuid), { .u = 0 } },
731			{ MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, chapteruid), { .u = 0 } },
732			{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, attachuid), { .u = 0 } },
733			CHILD_OF(matroska_tag)
734			};
735
736			static EbmlSyntax matroska_tag[] = {
737			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
738			{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
739			CHILD_OF(matroska_tags)
740			};
741
742			static EbmlSyntax matroska_tags[] = {
743			{ MATROSKA_ID_TAG, EBML_NEST, 0, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
744			CHILD_OF(matroska_segment)
745			};
746
747			static EbmlSyntax matroska_seekhead_entry[] = {
748			{ MATROSKA_ID_SEEKID, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, id) },
749			{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
750			CHILD_OF(matroska_seekhead)
751			};
752
753			static EbmlSyntax matroska_seekhead[] = {
754			{ MATROSKA_ID_SEEKENTRY, EBML_NEST, 0, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
755			CHILD_OF(matroska_segment)
756			};
757
758			static EbmlSyntax matroska_segment[] = {
759			{ MATROSKA_ID_CLUSTER, EBML_STOP },
760			{ MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, 0, { .n = matroska_info } },
761			{ MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tracks } },
762			{ MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_attachments } },
763			{ MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_chapters } },
764			{ MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, 0, { .n = matroska_index } },
765			{ MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tags } },
766			{ MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, 0, { .n = matroska_seekhead } },
767			{ 0 } /* We don't want to go back to level 0, so don't add the parent. */
768			};
769
770			static EbmlSyntax matroska_segments[] = {
771			{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, 0, { .n = matroska_segment } },
772			{ 0 }
773			};
774
775			static EbmlSyntax matroska_blockmore[] = {
776			{ MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, 0, offsetof(MatroskaBlockMore,additional_id), { .u = MATROSKA_BLOCK_ADD_ID_OPAQUE } },
777			{ MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, 0, offsetof(MatroskaBlockMore,additional) },
778			CHILD_OF(matroska_blockadditions)
779			};
780
781			static EbmlSyntax matroska_blockadditions[] = {
782			{ MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, sizeof(MatroskaBlockMore), offsetof(MatroskaBlock, blockmore), { .n = matroska_blockmore } },
783			CHILD_OF(matroska_blockgroup)
784			};
785
786			static EbmlSyntax matroska_blockgroup[] = {
787			{ MATROSKA_ID_BLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
788			{ MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, 0, { .n = matroska_blockadditions} },
789			{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, 0, offsetof(MatroskaBlock, duration) },
790			{ MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, 0, offsetof(MatroskaBlock, discard_padding) },
791			{ MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 1, 0, offsetof(MatroskaBlock, reference) },
792			{ MATROSKA_ID_CODECSTATE, EBML_NONE },
793			{ 1, EBML_UINT, 0, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
794			CHILD_OF(matroska_cluster_parsing)
795			};
796
797			// The following array contains SimpleBlock and BlockGroup twice
798			// in order to reuse the other values for matroska_cluster_enter.
799			static EbmlSyntax matroska_cluster_parsing[] = {
800			{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
801			{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, 0, { .n = matroska_blockgroup } },
802			{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, 0, offsetof(MatroskaCluster, timecode) },
803			{ MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
804			{ MATROSKA_ID_BLOCKGROUP, EBML_STOP },
805			{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
806			{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
807			CHILD_OF(matroska_segment)
808			};
809
810			static EbmlSyntax matroska_cluster_enter[] = {
811			{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, 0, { .n = &matroska_cluster_parsing[2] } },
812			{ 0 }
813			};
814			#undef CHILD_OF
815
816			static const CodecMime mkv_image_mime_tags[] = {
817			{"image/gif" , AV_CODEC_ID_GIF},
818			{"image/jpeg" , AV_CODEC_ID_MJPEG},
819			{"image/png" , AV_CODEC_ID_PNG},
820			{"image/tiff" , AV_CODEC_ID_TIFF},
821
822			{"" , AV_CODEC_ID_NONE}
823			};
824
825			static const CodecMime mkv_mime_tags[] = {
826			{"application/x-truetype-font", AV_CODEC_ID_TTF},
827			{"application/x-font" , AV_CODEC_ID_TTF},
828			{"application/vnd.ms-opentype", AV_CODEC_ID_OTF},
829			{"binary" , AV_CODEC_ID_BIN_DATA},
830
831			{"" , AV_CODEC_ID_NONE}
832			};
833
834			static const char * const matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT] = {
835			"left",
836			"right",
837			"background",
838			};
839
840			static const char *const matroska_doctypes[] = { "matroska", "webm" };
841
842			/*
843			* This function prepares the status for parsing of level 1 elements.
844			*/
845		198	static int matroska_reset_status(MatroskaDemuxContext *matroska,
846			uint32_t id, int64_t position)
847			{
848		198	int64_t err = 0;
849	2/2 ✓ Branch 0 taken 185 times. ✓ Branch 1 taken 13 times.	198	if (position >= 0) {
850		185	err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
851	1/2 ✓ Branch 0 taken 185 times. ✗ Branch 1 not taken.	185	if (err > 0)
852		185	err = 0;
853			} else
854		13	position = avio_tell(matroska->ctx->pb);
855
856		198	matroska->current_id = id;
857		198	matroska->num_levels = 1;
858		198	matroska->unknown_count = 0;
859		198	matroska->resync_pos = position;
860	2/2 ✓ Branch 0 taken 35 times. ✓ Branch 1 taken 163 times.	198	if (id)
861		35	matroska->resync_pos -= (av_log2(id) + 7) / 8;
862
863		198	return err;
864			}
865
866		13	static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
867			{
868		13	AVIOContext *pb = matroska->ctx->pb;
869			uint32_t id;
870
871			/* Try to seek to the last position to resync from. If this doesn't work,
872			* we resync from the earliest position available: The start of the buffer. */
873	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) {
874		2	av_log(matroska->ctx, AV_LOG_WARNING,
875			"Seek to desired resync point failed. Seeking to "
876			"earliest point available instead.\n");
877	1/2 ✓ Branch 1 taken 2 times. ✗ Branch 2 not taken.	2	avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
878			last_pos + 1), SEEK_SET);
879			}
880
881		13	id = avio_rb32(pb);
882
883			// try to find a toplevel element
884	2/2 ✓ Branch 1 taken 690589 times. ✓ Branch 2 taken 10 times.	690599	while (!avio_feof(pb)) {
885	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 ||
886	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 ||
887	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 ||
888	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 690586 times.	690586	id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
889			/* Prepare the context for parsing of a level 1 element. */
890		3	matroska_reset_status(matroska, id, -1);
891			/* Given that we are here means that an error has occurred,
892			* so treat the segment as unknown length in order not to
893			* discard valid data that happens to be beyond the designated
894			* end of the segment. */
895		3	matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
896		3	return 0;
897			}
898		690586	id = (id << 8) | avio_r8(pb);
899			}
900
901		10	matroska->done = 1;
902	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return pb->error ? pb->error : AVERROR_EOF;
903			}
904
905			/*
906			* Read: an "EBML number", which is defined as a variable-length
907			* array of bytes. The first byte indicates the length by giving a
908			* number of 0-bits followed by a one. The position of the first
909			* "one" bit inside the first byte indicates the length of this
910			* number.
911			* Returns: number of bytes read, < 0 on error
912			*/
913		143311	static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
914			int max_size, uint64_t *number, int eof_forbidden)
915			{
916		143311	int read, n = 1;
917			uint64_t total;
918			int64_t pos;
919
920			/* The first byte tells us the length in bytes - except when it is zero. */
921		143311	total = avio_r8(pb);
922	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 143297 times.	143311	if (pb->eof_reached)
923		14	goto err;
924
925			/* get the length of the EBML number */
926		143297	read = 8 - ff_log2_tab[total];
927
928	2/4 ✓ Branch 0 taken 143297 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 143297 times.	143297	if (!total || read > max_size) {
929		✗	pos = avio_tell(pb) - 1;
930		✗	if (!total) {
931		✗	av_log(matroska->ctx, AV_LOG_ERROR,
932			"0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
933			"of an EBML number\n", pos, pos);
934			} else {
935		✗	av_log(matroska->ctx, AV_LOG_ERROR,
936			"Length %d indicated by an EBML number's first byte 0x%02x "
937			"at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
938		✗	read, (uint8_t) total, pos, pos, max_size);
939			}
940		✗	return AVERROR_INVALIDDATA;
941			}
942
943			/* read out length */
944		143297	total ^= 1 << ff_log2_tab[total];
945	2/2 ✓ Branch 0 taken 71879 times. ✓ Branch 1 taken 143297 times.	215176	while (n++ < read)
946		71879	total = (total << 8) | avio_r8(pb);
947
948	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 143297 times.	143297	if (pb->eof_reached) {
949		✗	eof_forbidden = 1;
950		✗	goto err;
951			}
952
953		143297	*number = total;
954
955		143297	return read;
956
957		14	err:
958		14	pos = avio_tell(pb);
959	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (pb->error) {
960		✗	av_log(matroska->ctx, AV_LOG_ERROR,
961			"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
962			pos, pos);
963		✗	return pb->error;
964			}
965	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (eof_forbidden) {
966		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
967			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
968		✗	return AVERROR(EIO);
969			}
970		14	return AVERROR_EOF;
971			}
972
973			/**
974			* Read a EBML length value.
975			* This needs special handling for the "unknown length" case which has multiple
976			* encodings.
977			*/
978		56139	static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
979			uint64_t *number)
980			{
981		56139	int res = ebml_read_num(matroska, pb, 8, number, 1);
982	3/4 ✓ Branch 0 taken 56139 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 17 times. ✓ Branch 3 taken 56122 times.	56139	if (res > 0 && *number + 1 == 1ULL << (7 * res))
983		17	*number = EBML_UNKNOWN_LENGTH;
984		56139	return res;
985			}
986
987			/*
988			* Read the next element as an unsigned int.
989			* Returns NEEDS_CHECKING unless size == 0.
990			*/
991		10773	static int ebml_read_uint(AVIOContext *pb, int size,
992			uint64_t default_value, uint64_t *num)
993			{
994		10773	int n = 0;
995
996	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10773 times.	10773	if (size == 0) {
997		✗	*num = default_value;
998		✗	return 0;
999			}
1000			/* big-endian ordering; build up number */
1001		10773	*num = 0;
1002	2/2 ✓ Branch 0 taken 27221 times. ✓ Branch 1 taken 10773 times.	37994	while (n++ < size)
1003		27221	*num = (*num << 8) | avio_r8(pb);
1004
1005		10773	return NEEDS_CHECKING;
1006			}
1007
1008			/*
1009			* Read the next element as a signed int.
1010			* Returns NEEDS_CHECKING unless size == 0.
1011			*/
1012		163	static int ebml_read_sint(AVIOContext *pb, int size,
1013			int64_t default_value, int64_t *num)
1014			{
1015		163	int n = 1;
1016
1017	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 163 times.	163	if (size == 0) {
1018		✗	*num = default_value;
1019		✗	return 0;
1020			} else {
1021		163	*num = sign_extend(avio_r8(pb), 8);
1022
1023			/* big-endian ordering; build up number */
1024	2/2 ✓ Branch 0 taken 95 times. ✓ Branch 1 taken 163 times.	258	while (n++ < size)
1025		95	*num = ((uint64_t)*num << 8) | avio_r8(pb);
1026			}
1027
1028		163	return NEEDS_CHECKING;
1029			}
1030
1031			/*
1032			* Read the next element as a float.
1033			* Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
1034			*/
1035		756	static int ebml_read_float(AVIOContext *pb, int size,
1036			double default_value, double *num)
1037			{
1038	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 756 times.	756	if (size == 0) {
1039		✗	*num = default_value;
1040		✗	return 0;
1041	2/2 ✓ Branch 0 taken 86 times. ✓ Branch 1 taken 670 times.	756	} else if (size == 4) {
1042		86	*num = av_int2float(avio_rb32(pb));
1043	1/2 ✓ Branch 0 taken 670 times. ✗ Branch 1 not taken.	670	} else if (size == 8) {
1044		670	*num = av_int2double(avio_rb64(pb));
1045			} else
1046		✗	return AVERROR_INVALIDDATA;
1047
1048		756	return NEEDS_CHECKING;
1049			}
1050
1051			/*
1052			* Read the next element as an ASCII string.
1053			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1054			*/
1055		2382	static int ebml_read_ascii(AVIOContext *pb, int size,
1056			const char *default_value, char **str)
1057			{
1058			char *res;
1059			int ret;
1060
1061	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2382 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	2382	if (size == 0 && default_value) {
1062		✗	res = av_strdup(default_value);
1063		✗	if (!res)
1064		✗	return AVERROR(ENOMEM);
1065			} else {
1066			/* EBML strings are usually not 0-terminated, so we allocate one
1067			* byte more, read the string and NUL-terminate it ourselves. */
1068	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2382 times.	2382	if (!(res = av_malloc(size + 1)))
1069		✗	return AVERROR(ENOMEM);
1070	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2382 times.	2382	if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
1071		✗	av_free(res);
1072		✗	return ret < 0 ? ret : NEEDS_CHECKING;
1073			}
1074		2382	(res)[size] = '\0';
1075			}
1076		2382	av_free(*str);
1077		2382	*str = res;
1078
1079		2382	return 0;
1080			}
1081
1082			/*
1083			* Read the next element as binary data.
1084			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1085			*/
1086		31047	static int ebml_read_binary(AVIOContext *pb, int length,
1087			int64_t pos, EbmlBin *bin)
1088			{
1089			int ret;
1090
1091		31047	ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1092	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31047 times.	31047	if (ret < 0)
1093		✗	return ret;
1094		31047	memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1095
1096		31047	bin->data = bin->buf->data;
1097		31047	bin->size = length;
1098		31047	bin->pos = pos;
1099	2/2 ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 31037 times.	31047	if ((ret = avio_read(pb, bin->data, length)) != length) {
1100		10	av_buffer_unref(&bin->buf);
1101		10	bin->data = NULL;
1102		10	bin->size = 0;
1103	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return ret < 0 ? ret : NEEDS_CHECKING;
1104			}
1105
1106		31037	return 0;
1107			}
1108
1109			/*
1110			* Read the next element, but only the header. The contents
1111			* are supposed to be sub-elements which can be read separately.
1112			* 0 is success, < 0 is failure.
1113			*/
1114		7859	static int ebml_read_master(MatroskaDemuxContext *matroska,
1115			uint64_t length, int64_t pos)
1116			{
1117			MatroskaLevel *level;
1118
1119	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7859 times.	7859	if (matroska->num_levels >= EBML_MAX_DEPTH) {
1120		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1121			"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1122		✗	return AVERROR(ENOSYS);
1123			}
1124
1125		7859	level = &matroska->levels[matroska->num_levels++];
1126		7859	level->start = pos;
1127		7859	level->length = length;
1128
1129		7859	return 0;
1130			}
1131
1132			/*
1133			* Read a signed "EBML number"
1134			* Return: number of bytes processed, < 0 on error
1135			*/
1136		236	static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1137			AVIOContext *pb, int64_t *num)
1138			{
1139			uint64_t unum;
1140			int res;
1141
1142			/* read as unsigned number first */
1143	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 236 times.	236	if ((res = ebml_read_num(matroska, pb, 8, &unum, 1)) < 0)
1144		✗	return res;
1145
1146			/* make signed (weird way) */
1147		236	*num = unum - ((1LL << (7 * res - 1)) - 1);
1148
1149		236	return res;
1150			}
1151
1152			static int ebml_parse(MatroskaDemuxContext *matroska,
1153			EbmlSyntax *syntax, void *data);
1154
1155		58034	static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1156			{
1157			int i;
1158
1159			// Whoever touches this should be aware of the duplication
1160			// existing in matroska_cluster_parsing.
1161	2/2 ✓ Branch 0 taken 121927 times. ✓ Branch 1 taken 757 times.	122684	for (i = 0; syntax[i].id; i++)
1162	2/2 ✓ Branch 0 taken 57277 times. ✓ Branch 1 taken 64650 times.	121927	if (id == syntax[i].id)
1163		57277	break;
1164
1165		58034	return &syntax[i];
1166			}
1167
1168		7859	static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1169			void *data)
1170			{
1171			int res;
1172
1173	1/2 ✓ Branch 0 taken 7859 times. ✗ Branch 1 not taken.	7859	if (data) {
1174	2/2 ✓ Branch 0 taken 49951 times. ✓ Branch 1 taken 7859 times.	57810	for (int i = 0; syntax[i].id; i++) {
1175		49951	void *dst = (char *)data + syntax[i].data_offset;
1176	5/5 ✓ Branch 0 taken 21542 times. ✓ Branch 1 taken 974 times. ✓ Branch 2 taken 1441 times. ✓ Branch 3 taken 4048 times. ✓ Branch 4 taken 21946 times.	49951	switch (syntax[i].type) {
1177		21542	case EBML_UINT:
1178		21542	*(uint64_t *)dst = syntax[i].def.u;
1179		21542	break;
1180		974	case EBML_SINT:
1181		974	*(int64_t *) dst = syntax[i].def.i;
1182		974	break;
1183		1441	case EBML_FLOAT:
1184		1441	*(double *) dst = syntax[i].def.f;
1185		1441	break;
1186		4048	case EBML_STR:
1187			case EBML_UTF8:
1188			// the default may be NULL
1189	2/2 ✓ Branch 0 taken 1267 times. ✓ Branch 1 taken 2781 times.	4048	if (syntax[i].def.s) {
1190		1267	*(char**)dst = av_strdup(syntax[i].def.s);
1191	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1267 times.	1267	if (!*(char**)dst)
1192		✗	return AVERROR(ENOMEM);
1193			}
1194		4048	break;
1195			}
1196			}
1197
1198	2/2 ✓ Branch 0 taken 53 times. ✓ Branch 1 taken 7806 times.	7859	if (!matroska->levels[matroska->num_levels - 1].length) {
1199		53	matroska->num_levels--;
1200		53	return 0;
1201			}
1202			}
1203
1204			do {
1205		24594	res = ebml_parse(matroska, syntax, data);
1206	2/2 ✓ Branch 0 taken 16788 times. ✓ Branch 1 taken 7806 times.	24594	} while (!res);
1207
1208	2/2 ✓ Branch 0 taken 1177 times. ✓ Branch 1 taken 6629 times.	7806	return res == LEVEL_ENDED ? 0 : res;
1209			}
1210
1211		2435	static int is_ebml_id_valid(uint32_t id)
1212			{
1213			// Due to endian nonsense in Matroska, the highest byte with any bits set
1214			// will contain the leading length bit. This bit in turn identifies the
1215			// total byte length of the element by its position within the byte.
1216		2435	unsigned int bits = av_log2(id);
1217	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);
1218			}
1219
1220			/*
1221			* Allocate and return the entry for the level1 element with the given ID. If
1222			* an entry already exists, return the existing entry.
1223			*/
1224		2435	static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1225			uint32_t id, int64_t pos)
1226			{
1227			int i;
1228			MatroskaLevel1Element *elem;
1229
1230	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2435 times.	2435	if (!is_ebml_id_valid(id))
1231		✗	return NULL;
1232
1233			// Some files link to all clusters; useless.
1234	2/2 ✓ Branch 0 taken 25 times. ✓ Branch 1 taken 2410 times.	2435	if (id == MATROSKA_ID_CLUSTER)
1235		25	return NULL;
1236
1237			// There can be multiple SeekHeads and Tags.
1238	2/2 ✓ Branch 0 taken 4935 times. ✓ Branch 1 taken 1558 times.	6493	for (i = 0; i < matroska->num_level1_elems; i++) {
1239	2/2 ✓ Branch 0 taken 860 times. ✓ Branch 1 taken 4075 times.	4935	if (matroska->level1_elems[i].id == id) {
1240	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 ||
1241		✗	id != MATROSKA_ID_SEEKHEAD && id != MATROSKA_ID_TAGS)
1242		852	return &matroska->level1_elems[i];
1243			}
1244			}
1245
1246			// Only a completely broken file would have more elements.
1247	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1558 times.	1558	if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1248		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements.\n");
1249		✗	return NULL;
1250			}
1251
1252		1558	elem = &matroska->level1_elems[matroska->num_level1_elems++];
1253		1558	*elem = (MatroskaLevel1Element){.id = id};
1254
1255		1558	return elem;
1256			}
1257
1258		58045	static int ebml_parse(MatroskaDemuxContext *matroska,
1259			EbmlSyntax *syntax, void *data)
1260			{
1261			static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1262			// Forbid unknown-length EBML_NONE elements.
1263			[EBML_NONE] = EBML_UNKNOWN_LENGTH - 1,
1264			[EBML_UINT] = 8,
1265			[EBML_SINT] = 8,
1266			[EBML_FLOAT] = 8,
1267			// max. 16 MB for strings
1268			[EBML_STR] = 0x1000000,
1269			[EBML_UTF8] = 0x1000000,
1270			// max. 256 MB for binary data
1271			[EBML_BIN] = 0x10000000,
1272			// no limits for anything else
1273			};
1274		58045	AVIOContext *pb = matroska->ctx->pb;
1275			uint32_t id;
1276			uint64_t length;
1277		58045	int64_t pos = avio_tell(pb), pos_alt;
1278		58045	int res, update_pos = 1, level_check;
1279			MatroskaLevel1Element *level1_elem;
1280	2/2 ✓ Branch 0 taken 57301 times. ✓ Branch 1 taken 744 times.	58045	MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1281
1282	2/2 ✓ Branch 0 taken 56072 times. ✓ Branch 1 taken 1973 times.	58045	if (!matroska->current_id) {
1283			uint64_t id;
1284		56072	res = ebml_read_num(matroska, pb, 4, &id, 0);
1285	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 56058 times.	56072	if (res < 0) {
1286	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) {
1287	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 10 times.	14	if (matroska->is_live)
1288			// in live mode, finish parsing if EOF is reached.
1289		14	return 1;
1290	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)) {
1291	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	if (level->length == EBML_UNKNOWN_LENGTH) {
1292			// Unknown-length levels automatically end at EOF.
1293		10	matroska->num_levels--;
1294		10	return LEVEL_ENDED;
1295			} else {
1296		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1297			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1298			}
1299			}
1300			}
1301		✗	return res;
1302			}
1303		56058	matroska->current_id = id | 1 << 7 * res;
1304		56058	pos_alt = pos + res;
1305			} else {
1306		1973	pos_alt = pos;
1307		1973	pos -= (av_log2(matroska->current_id) + 7) / 8;
1308			}
1309
1310		58031	id = matroska->current_id;
1311
1312		58031	syntax = ebml_parse_id(syntax, id);
1313	6/6 ✓ Branch 0 taken 757 times. ✓ Branch 1 taken 57274 times. ✓ Branch 2 taken 524 times. ✓ Branch 3 taken 233 times. ✓ Branch 4 taken 44 times. ✓ Branch 5 taken 480 times.	58031	if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1314	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) {
1315			// Unknown-length levels end when an element from an upper level
1316			// in the hierarchy is encountered.
1317	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 4 times.	7	while (syntax->def.n) {
1318		3	syntax = ebml_parse_id(syntax->def.n, id);
1319	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (syntax->id) {
1320		3	matroska->num_levels--;
1321		3	return LEVEL_ENDED;
1322			}
1323			// We have not encountered a known element; syntax is a sentinel.
1324			av_assert1(syntax->type == EBML_NONE);
1325			};
1326			}
1327
1328		41	av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1329			"%"PRId64"\n", id, pos);
1330		41	update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1331			}
1332
1333	2/2 ✓ Branch 0 taken 56884 times. ✓ Branch 1 taken 1144 times.	58028	if (data) {
1334		56884	data = (char *) data + syntax->data_offset;
1335	2/2 ✓ Branch 0 taken 3742 times. ✓ Branch 1 taken 53142 times.	56884	if (syntax->list_elem_size) {
1336		3742	EbmlList *list = data;
1337			void *newelem;
1338
1339	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3742 times.	3742	if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1340		✗	return AVERROR(ENOMEM);
1341		3742	newelem = av_fast_realloc(list->elem,
1342			&list->alloc_elem_size,
1343		3742	(list->nb_elem + 1) * syntax->list_elem_size);
1344	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3742 times.	3742	if (!newelem)
1345		✗	return AVERROR(ENOMEM);
1346		3742	list->elem = newelem;
1347		3742	data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1348		3742	memset(data, 0, syntax->list_elem_size);
1349		3742	list->nb_elem++;
1350			}
1351			}
1352
1353	2/2 ✓ Branch 0 taken 56050 times. ✓ Branch 1 taken 1978 times.	58028	if (syntax->type != EBML_STOP) {
1354		56050	matroska->current_id = 0;
1355	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 56050 times.	56050	if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1356		✗	return res;
1357
1358		56050	pos_alt += res;
1359
1360	2/2 ✓ Branch 0 taken 55306 times. ✓ Branch 1 taken 744 times.	56050	if (matroska->num_levels > 0) {
1361	2/2 ✓ Branch 0 taken 55300 times. ✓ Branch 1 taken 6 times.	55306	if (length != EBML_UNKNOWN_LENGTH &&
1362	2/2 ✓ Branch 0 taken 55190 times. ✓ Branch 1 taken 110 times.	110490	level->length != EBML_UNKNOWN_LENGTH) {
1363		55190	uint64_t elem_end = pos_alt + length,
1364		55190	level_end = level->start + level->length;
1365
1366	2/2 ✓ Branch 0 taken 47533 times. ✓ Branch 1 taken 7657 times.	55190	if (elem_end < level_end) {
1367		47533	level_check = 0;
1368	1/2 ✓ Branch 0 taken 7657 times. ✗ Branch 1 not taken.	7657	} else if (elem_end == level_end) {
1369		7657	level_check = LEVEL_ENDED;
1370			} else {
1371		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1372			"Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1373			"containing master element ending at 0x%"PRIx64"\n",
1374			pos, elem_end, level_end);
1375		✗	return AVERROR_INVALIDDATA;
1376			}
1377	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 6 times.	116	} else if (length != EBML_UNKNOWN_LENGTH) {
1378		110	level_check = 0;
1379	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	} else if (level->length != EBML_UNKNOWN_LENGTH) {
1380		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1381			"at 0x%"PRIx64" inside parent with finite size\n", pos);
1382		✗	return AVERROR_INVALIDDATA;
1383			} else {
1384		6	level_check = 0;
1385	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
1386	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	|| syntax->type == EBML_NEST)) {
1387			// According to the current specifications only clusters and
1388			// segments are allowed to be unknown-length. We also accept
1389			// other unknown-length master elements.
1390		✗	av_log(matroska->ctx, AV_LOG_WARNING,
1391			"Found unknown-length element 0x%"PRIX32" other than "
1392			"a cluster at 0x%"PRIx64". Spec-incompliant, but "
1393			"parsing will nevertheless be attempted.\n", id, pos);
1394		✗	update_pos = -1;
1395			}
1396			}
1397			} else
1398		744	level_check = 0;
1399
1400	4/4 ✓ Branch 0 taken 47861 times. ✓ Branch 1 taken 8189 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 47859 times.	56050	if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1401	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (length != EBML_UNKNOWN_LENGTH) {
1402		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1403			"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1404			"with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1405		✗	length, max_lengths[syntax->type], id, pos);
1406	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	} else if (syntax->type != EBML_NONE) {
1407		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1408			"Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1409			"unknown length, yet the length of an element of its "
1410			"type must be known.\n", id, pos);
1411			} else {
1412		2	av_log(matroska->ctx, AV_LOG_ERROR,
1413			"Found unknown-length element with ID 0x%"PRIX32" at "
1414			"pos. 0x%"PRIx64" for which no syntax for parsing is "
1415			"available.\n", id, pos);
1416			}
1417		2	return AVERROR_INVALIDDATA;
1418			}
1419
1420	2/2 ✓ Branch 0 taken 130 times. ✓ Branch 1 taken 55918 times.	56048	if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1421			// Losing sync will likely manifest itself as encountering unknown
1422			// elements which are not reliably distinguishable from elements
1423			// belonging to future extensions of the format.
1424			// We use a heuristic to detect such situations: If the current
1425			// element is not expected at the current syntax level and there
1426			// were only a few unknown elements in a row, then the element is
1427			// skipped or considered defective based upon the length of the
1428			// current element (i.e. how much would be skipped); if there were
1429			// more than a few skipped elements in a row and skipping the current
1430			// element would lead us more than SKIP_THRESHOLD away from the last
1431			// known good position, then it is inferred that an error occurred.
1432			// The dependency on the number of unknown elements in a row exists
1433			// because the distance to the last known good position is
1434			// automatically big if the last parsed element was big.
1435			// In both cases, each unknown element is considered equivalent to
1436			// UNKNOWN_EQUIV of skipped bytes for the check.
1437			// The whole check is only done for non-seekable output, because
1438			// in this situation skipped data can't simply be rechecked later.
1439			// This is especially important when using unknown length elements
1440			// as the check for whether a child exceeds its containing master
1441			// element is not effective in this situation.
1442	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 2 times.	130	if (update_pos) {
1443		128	matroska->unknown_count = 0;
1444			} else {
1445		2	int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1446
1447	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (matroska->unknown_count > 3)
1448		✗	dist += pos_alt - matroska->resync_pos;
1449
1450	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (dist > SKIP_THRESHOLD) {
1451		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1452			"Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1453			"length 0x%"PRIx64" considered as invalid data. Last "
1454			"known good position 0x%"PRIx64", %d unknown elements"
1455			" in a row\n", id, pos, length, matroska->resync_pos,
1456			matroska->unknown_count);
1457		✗	return AVERROR_INVALIDDATA;
1458			}
1459			}
1460			}
1461
1462	2/2 ✓ Branch 0 taken 56009 times. ✓ Branch 1 taken 39 times.	56048	if (update_pos > 0) {
1463			// We have found an element that is allowed at this place
1464			// in the hierarchy and it passed all checks, so treat the beginning
1465			// of the element as the "last known good" position.
1466		56009	matroska->resync_pos = pos;
1467			}
1468
1469	3/4 ✓ Branch 0 taken 337 times. ✓ Branch 1 taken 55711 times. ✓ Branch 2 taken 337 times. ✗ Branch 3 not taken.	56048	if (!data && length != EBML_UNKNOWN_LENGTH)
1470		337	goto skip;
1471			}
1472
1473	8/8 ✓ Branch 0 taken 10773 times. ✓ Branch 1 taken 163 times. ✓ Branch 2 taken 756 times. ✓ Branch 3 taken 2382 times. ✓ Branch 4 taken 31047 times. ✓ Branch 5 taken 7859 times. ✓ Branch 6 taken 1978 times. ✓ Branch 7 taken 2731 times.	57689	switch (syntax->type) {
1474		10773	case EBML_UINT:
1475		10773	res = ebml_read_uint(pb, length, syntax->def.u, data);
1476		10773	break;
1477		163	case EBML_SINT:
1478		163	res = ebml_read_sint(pb, length, syntax->def.i, data);
1479		163	break;
1480		756	case EBML_FLOAT:
1481		756	res = ebml_read_float(pb, length, syntax->def.f, data);
1482		756	break;
1483		2382	case EBML_STR:
1484			case EBML_UTF8:
1485		2382	res = ebml_read_ascii(pb, length, syntax->def.s, data);
1486		2382	break;
1487		31047	case EBML_BIN:
1488		31047	res = ebml_read_binary(pb, length, pos_alt, data);
1489		31047	break;
1490		7859	case EBML_LEVEL1:
1491			case EBML_NEST:
1492	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7859 times.	7859	if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1493		✗	return res;
1494	2/2 ✓ Branch 0 taken 372 times. ✓ Branch 1 taken 7487 times.	7859	if (id == MATROSKA_ID_SEGMENT)
1495		372	matroska->segment_start = pos_alt;
1496	2/2 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 7839 times.	7859	if (id == MATROSKA_ID_CUES)
1497		20	matroska->cues_parsing_deferred = 0;
1498	3/4 ✓ Branch 0 taken 1239 times. ✓ Branch 1 taken 6620 times. ✓ Branch 2 taken 1239 times. ✗ Branch 3 not taken.	9098	if (syntax->type == EBML_LEVEL1 &&
1499		1239	(level1_elem = matroska_find_level1_elem(matroska, syntax->id, pos))) {
1500	2/2 ✓ Branch 0 taken 1217 times. ✓ Branch 1 taken 22 times.	1239	if (!level1_elem->pos) {
1501			// Zero is not a valid position for a level 1 element.
1502		1217	level1_elem->pos = pos;
1503	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 22 times.	22	} else if (level1_elem->pos != pos)
1504		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1505		1239	level1_elem->parsed = 1;
1506			}
1507	2/2 ✓ Branch 1 taken 1177 times. ✓ Branch 2 taken 6682 times.	7859	if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1508		1177	return res;
1509		6682	break;
1510		1978	case EBML_STOP:
1511		1978	return 1;
1512		337	skip:
1513		3068	default:
1514	2/2 ✓ Branch 0 taken 3066 times. ✓ Branch 1 taken 2 times.	3068	if (length) {
1515			int64_t res2;
1516	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3066 times.	3066	if (ffio_limit(pb, length) != length) {
1517			// ffio_limit emits its own error message,
1518			// so we don't have to.
1519		✗	return AVERROR(EIO);
1520			}
1521	1/2 ✓ Branch 1 taken 3066 times. ✗ Branch 2 not taken.	3066	if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1522			// avio_skip might take us past EOF. We check for this
1523			// by skipping only length - 1 bytes, reading a byte and
1524			// checking the error flags. This is done in order to check
1525			// that the element has been properly skipped even when
1526			// no filesize (that ffio_limit relies on) is available.
1527		3066	avio_r8(pb);
1528		3066	res = NEEDS_CHECKING;
1529			} else
1530		✗	res = res2;
1531			} else
1532		2	res = 0;
1533			}
1534	2/2 ✓ Branch 0 taken 14768 times. ✓ Branch 1 taken 40103 times.	54871	if (res) {
1535	1/2 ✓ Branch 0 taken 14768 times. ✗ Branch 1 not taken.	14768	if (res == NEEDS_CHECKING) {
1536	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 14758 times.	14768	if (pb->eof_reached) {
1537	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (pb->error)
1538		✗	res = pb->error;
1539			else
1540		10	res = AVERROR_EOF;
1541			} else
1542		14758	goto level_check;
1543			}
1544
1545	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (res == AVERROR_INVALIDDATA)
1546		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1547	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	else if (res == AVERROR(EIO))
1548		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1549	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	else if (res == AVERROR_EOF) {
1550		10	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1551		10	res = AVERROR(EIO);
1552			}
1553
1554		10	return res;
1555			}
1556
1557		40103	level_check:
1558	3/4 ✓ Branch 0 taken 147 times. ✓ Branch 1 taken 54714 times. ✓ Branch 2 taken 147 times. ✗ Branch 3 not taken.	54861	if (syntax->is_counted && data) {
1559		147	CountedElement *elem = data;
1560	1/2 ✓ Branch 0 taken 147 times. ✗ Branch 1 not taken.	147	if (elem->count != UINT_MAX)
1561		147	elem->count++;
1562			}
1563
1564	4/4 ✓ Branch 0 taken 7592 times. ✓ Branch 1 taken 47269 times. ✓ Branch 2 taken 7562 times. ✓ Branch 3 taken 30 times.	54861	if (level_check == LEVEL_ENDED && matroska->num_levels) {
1565		7562	level = &matroska->levels[matroska->num_levels - 1];
1566		7562	pos = avio_tell(pb);
1567
1568			// Given that pos >= level->start no check for
1569			// level->length != EBML_UNKNOWN_LENGTH is necessary.
1570	4/4 ✓ Branch 0 taken 14471 times. ✓ Branch 1 taken 731 times. ✓ Branch 2 taken 7640 times. ✓ Branch 3 taken 6831 times.	15202	while (matroska->num_levels && pos == level->start + level->length) {
1571		7640	matroska->num_levels--;
1572		7640	level--;
1573			}
1574			}
1575
1576		54861	return level_check;
1577			}
1578
1579		72281	static void ebml_free(EbmlSyntax *syntax, void *data)
1580			{
1581			int i, j;
1582	2/2 ✓ Branch 0 taken 299659 times. ✓ Branch 1 taken 72281 times.	371940	for (i = 0; syntax[i].id; i++) {
1583		299659	void *data_off = (char *) data + syntax[i].data_offset;
1584	4/4 ✓ Branch 0 taken 4042 times. ✓ Branch 1 taken 32613 times. ✓ Branch 2 taken 73012 times. ✓ Branch 3 taken 189992 times.	299659	switch (syntax[i].type) {
1585		4042	case EBML_STR:
1586			case EBML_UTF8:
1587		4042	av_freep(data_off);
1588		4042	break;
1589		32613	case EBML_BIN:
1590		32613	av_buffer_unref(&((EbmlBin *) data_off)->buf);
1591		32613	break;
1592		73012	case EBML_LEVEL1:
1593			case EBML_NEST:
1594	2/2 ✓ Branch 0 taken 35944 times. ✓ Branch 1 taken 37068 times.	73012	if (syntax[i].list_elem_size) {
1595		35944	EbmlList *list = data_off;
1596		35944	char *ptr = list->elem;
1597	2/2 ✓ Branch 0 taken 3742 times. ✓ Branch 1 taken 35944 times.	39686	for (j = 0; j < list->nb_elem;
1598		3742	j++, ptr += syntax[i].list_elem_size)
1599		3742	ebml_free(syntax[i].def.n, ptr);
1600		35944	av_freep(&list->elem);
1601		35944	list->nb_elem = 0;
1602		35944	list->alloc_elem_size = 0;
1603			} else
1604		37068	ebml_free(syntax[i].def.n, data_off);
1605			default:
1606		263004	break;
1607			}
1608			}
1609		72281	}
1610
1611			/*
1612			* Autodetecting...
1613			*/
1614		7279	static int matroska_probe(const AVProbeData *p)
1615			{
1616		7279	uint64_t total = 0;
1617		7279	int len_mask = 0x80, size = 1, n = 1, i;
1618
1619			/* EBML header? */
1620	2/2 ✓ Branch 0 taken 6929 times. ✓ Branch 1 taken 350 times.	7279	if (AV_RB32(p->buf) != EBML_ID_HEADER)
1621		6929	return 0;
1622
1623			/* length of header */
1624		350	total = p->buf[4];
1625	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)) {
1626		1736	size++;
1627		1736	len_mask >>= 1;
1628			}
1629	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 350 times.	350	if (size > 8)
1630		✗	return 0;
1631		350	total &= (len_mask - 1);
1632	2/2 ✓ Branch 0 taken 1736 times. ✓ Branch 1 taken 350 times.	2086	while (n < size)
1633		1736	total = (total << 8) | p->buf[4 + n++];
1634
1635	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 350 times.	350	if (total + 1 == 1ULL << (7 * size)){
1636			/* Unknown-length header - simply parse the whole buffer. */
1637		✗	total = p->buf_size - 4 - size;
1638			} else {
1639			/* Does the probe data contain the whole header? */
1640	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 350 times.	350	if (p->buf_size < 4 + size + total)
1641		✗	return 0;
1642			}
1643
1644			/* The header should contain a known document type. For now,
1645			* we don't parse the whole header but simply check for the
1646			* availability of that array of characters inside the header.
1647			* Not fully fool-proof, but good enough. */
1648	1/2 ✓ Branch 0 taken 601 times. ✗ Branch 1 not taken.	601	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1649		601	size_t probelen = strlen(matroska_doctypes[i]);
1650	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 601 times.	601	if (total < probelen)
1651		✗	continue;
1652	2/2 ✓ Branch 0 taken 12982 times. ✓ Branch 1 taken 251 times.	13233	for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1653	2/2 ✓ Branch 0 taken 350 times. ✓ Branch 1 taken 12632 times.	12982	if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1654		350	return AVPROBE_SCORE_MAX;
1655			}
1656
1657			// probably valid EBML header but no recognized doctype
1658		✗	return AVPROBE_SCORE_EXTENSION;
1659			}
1660
1661		31368	static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1662			uint64_t num)
1663			{
1664		31368	MatroskaTrack *tracks = matroska->tracks.elem;
1665			int i;
1666
1667	2/2 ✓ Branch 0 taken 34470 times. ✓ Branch 1 taken 1 times.	34471	for (i = 0; i < matroska->tracks.nb_elem; i++)
1668	2/2 ✓ Branch 0 taken 31367 times. ✓ Branch 1 taken 3103 times.	34470	if (tracks[i].num == num)
1669		31367	return &tracks[i];
1670
1671		1	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1672		1	return NULL;
1673			}
1674
1675		82	static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1676			MatroskaTrack *track)
1677			{
1678		82	MatroskaTrackEncoding *encodings = track->encodings.elem;
1679		82	uint8_t *data = *buf;
1680		82	int isize = *buf_size;
1681		82	uint8_t *pkt_data = NULL;
1682			av_unused uint8_t *newpktdata;
1683		82	int pkt_size = isize;
1684		82	int result = 0;
1685			int olen;
1686
1687	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 82 times.	82	if (pkt_size >= 10000000U)
1688		✗	return AVERROR_INVALIDDATA;
1689
1690	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) {
1691		70	case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1692			{
1693		70	int header_size = encodings[0].compression.settings.size;
1694		70	uint8_t *header = encodings[0].compression.settings.data;
1695
1696	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) {
1697		✗	av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1698		✗	return -1;
1699			}
1700
1701	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!header_size)
1702		✗	return 0;
1703
1704		70	pkt_size = isize + header_size;
1705		70	pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1706	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!pkt_data)
1707		✗	return AVERROR(ENOMEM);
1708
1709		70	memcpy(pkt_data, header, header_size);
1710		70	memcpy(pkt_data + header_size, data, isize);
1711		70	break;
1712			}
1713		15	case MATROSKA_TRACK_ENCODING_COMP_LZO:
1714			do {
1715		15	int insize = isize;
1716		15	olen = pkt_size *= 3;
1717		15	newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1718		15	+ AV_INPUT_BUFFER_PADDING_SIZE);
1719	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 15 times.	15	if (!newpktdata) {
1720		✗	result = AVERROR(ENOMEM);
1721		✗	goto failed;
1722			}
1723		15	pkt_data = newpktdata;
1724		15	result = av_lzo1x_decode(pkt_data, &olen, data, &insize);
1725	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);
1726	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (result) {
1727		✗	result = AVERROR_INVALIDDATA;
1728		✗	goto failed;
1729			}
1730		4	pkt_size -= olen;
1731		4	break;
1732			#if CONFIG_ZLIB
1733		6	case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1734			{
1735		6	z_stream zstream = { 0 };
1736	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)
1737		✗	return -1;
1738		6	zstream.next_in = data;
1739		6	zstream.avail_in = isize;
1740			do {
1741		8	pkt_size *= 3;
1742		8	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1743	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (!newpktdata) {
1744		✗	inflateEnd(&zstream);
1745		✗	result = AVERROR(ENOMEM);
1746		✗	goto failed;
1747			}
1748		8	pkt_data = newpktdata;
1749		8	zstream.avail_out = pkt_size - zstream.total_out;
1750		8	zstream.next_out = pkt_data + zstream.total_out;
1751		8	result = inflate(&zstream, Z_NO_FLUSH);
1752	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);
1753		6	pkt_size = zstream.total_out;
1754		6	inflateEnd(&zstream);
1755	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (result != Z_STREAM_END) {
1756		✗	if (result == Z_MEM_ERROR)
1757		✗	result = AVERROR(ENOMEM);
1758			else
1759		✗	result = AVERROR_INVALIDDATA;
1760		✗	goto failed;
1761			}
1762		6	break;
1763			}
1764			#endif
1765			#if CONFIG_BZLIB
1766		2	case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1767			{
1768		2	bz_stream bzstream = { 0 };
1769	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)
1770		✗	return -1;
1771		2	bzstream.next_in = data;
1772		2	bzstream.avail_in = isize;
1773			do {
1774		6	pkt_size *= 3;
1775		6	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1776	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!newpktdata) {
1777		✗	BZ2_bzDecompressEnd(&bzstream);
1778		✗	result = AVERROR(ENOMEM);
1779		✗	goto failed;
1780			}
1781		6	pkt_data = newpktdata;
1782		6	bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1783		6	bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1784		6	result = BZ2_bzDecompress(&bzstream);
1785	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);
1786		2	pkt_size = bzstream.total_out_lo32;
1787		2	BZ2_bzDecompressEnd(&bzstream);
1788	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (result != BZ_STREAM_END) {
1789		✗	if (result == BZ_MEM_ERROR)
1790		✗	result = AVERROR(ENOMEM);
1791			else
1792		✗	result = AVERROR_INVALIDDATA;
1793		✗	goto failed;
1794			}
1795		2	break;
1796			}
1797			#endif
1798		✗	default:
1799		✗	return AVERROR_INVALIDDATA;
1800			}
1801
1802		82	memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1803
1804		82	*buf = pkt_data;
1805		82	*buf_size = pkt_size;
1806		82	return 0;
1807
1808		✗	failed:
1809		✗	av_free(pkt_data);
1810		✗	return result;
1811			}
1812
1813		209	static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1814			AVDictionary **metadata, char *prefix)
1815			{
1816		209	MatroskaTag *tags = list->elem;
1817			char key[1024];
1818			int i;
1819
1820	2/2 ✓ Branch 0 taken 448 times. ✓ Branch 1 taken 209 times.	657	for (i = 0; i < list->nb_elem; i++) {
1821		1344	const char *lang = tags[i].lang &&
1822	3/4 ✓ Branch 0 taken 448 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 45 times. ✓ Branch 3 taken 403 times.	448	strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1823
1824	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 448 times.	448	if (!tags[i].name) {
1825		✗	av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1826		✗	continue;
1827			}
1828	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 448 times.	448	if (prefix)
1829		✗	snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1830			else
1831		448	av_strlcpy(key, tags[i].name, sizeof(key));
1832	3/4 ✓ Branch 0 taken 448 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 403 times. ✓ Branch 3 taken 45 times.	448	if (tags[i].def || !lang) {
1833		403	av_dict_set(metadata, key, tags[i].string, 0);
1834	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 403 times.	403	if (tags[i].sub.nb_elem)
1835		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1836			}
1837	2/2 ✓ Branch 0 taken 45 times. ✓ Branch 1 taken 403 times.	448	if (lang) {
1838		45	av_strlcat(key, "-", sizeof(key));
1839		45	av_strlcat(key, lang, sizeof(key));
1840		45	av_dict_set(metadata, key, tags[i].string, 0);
1841	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (tags[i].sub.nb_elem)
1842		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1843			}
1844			}
1845		209	ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1846		209	}
1847
1848		372	static void matroska_convert_tags(AVFormatContext *s)
1849			{
1850		372	MatroskaDemuxContext *matroska = s->priv_data;
1851		372	MatroskaTags *tags = matroska->tags.elem;
1852			int i, j;
1853
1854	2/2 ✓ Branch 0 taken 209 times. ✓ Branch 1 taken 372 times.	581	for (i = 0; i < matroska->tags.nb_elem; i++) {
1855	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 206 times.	209	if (tags[i].target.attachuid) {
1856		3	MatroskaAttachment *attachment = matroska->attachments.elem;
1857		3	int found = 0;
1858	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	for (j = 0; j < matroska->attachments.nb_elem; j++) {
1859	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (attachment[j].uid == tags[i].target.attachuid &&
1860	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	attachment[j].stream) {
1861		3	matroska_convert_tag(s, &tags[i].tag,
1862		3	&attachment[j].stream->metadata, NULL);
1863		3	found = 1;
1864			}
1865			}
1866	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1867		✗	av_log(s, AV_LOG_WARNING,
1868			"The tags at index %d refer to a "
1869			"non-existent attachment %"PRId64".\n",
1870		✗	i, tags[i].target.attachuid);
1871			}
1872	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 203 times.	206	} else if (tags[i].target.chapteruid) {
1873		3	MatroskaChapter *chapter = matroska->chapters.elem;
1874		3	int found = 0;
1875	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 3 times.	9	for (j = 0; j < matroska->chapters.nb_elem; j++) {
1876	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	if (chapter[j].uid == tags[i].target.chapteruid &&
1877	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	chapter[j].chapter) {
1878		3	matroska_convert_tag(s, &tags[i].tag,
1879		3	&chapter[j].chapter->metadata, NULL);
1880		3	found = 1;
1881			}
1882			}
1883	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1884		✗	av_log(s, AV_LOG_WARNING,
1885			"The tags at index %d refer to a non-existent chapter "
1886			"%"PRId64".\n",
1887		✗	i, tags[i].target.chapteruid);
1888			}
1889	2/2 ✓ Branch 0 taken 150 times. ✓ Branch 1 taken 53 times.	203	} else if (tags[i].target.trackuid) {
1890		150	MatroskaTrack *track = matroska->tracks.elem;
1891		150	int found = 0;
1892	2/2 ✓ Branch 0 taken 398 times. ✓ Branch 1 taken 150 times.	548	for (j = 0; j < matroska->tracks.nb_elem; j++) {
1893	2/2 ✓ Branch 0 taken 150 times. ✓ Branch 1 taken 248 times.	398	if (track[j].uid == tags[i].target.trackuid &&
1894	1/2 ✓ Branch 0 taken 150 times. ✗ Branch 1 not taken.	150	track[j].stream) {
1895		150	matroska_convert_tag(s, &tags[i].tag,
1896		150	&track[j].stream->metadata, NULL);
1897		150	found = 1;
1898			}
1899			}
1900	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 150 times.	150	if (!found) {
1901		✗	av_log(s, AV_LOG_WARNING,
1902			"The tags at index %d refer to a non-existent track "
1903			"%"PRId64".\n",
1904		✗	i, tags[i].target.trackuid);
1905			}
1906			} else {
1907		53	matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1908		53	tags[i].target.type);
1909			}
1910			}
1911		372	}
1912
1913		24	static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1914			int64_t pos)
1915			{
1916		24	uint32_t saved_id = matroska->current_id;
1917		24	int64_t before_pos = avio_tell(matroska->ctx->pb);
1918		24	int ret = 0;
1919			int ret2;
1920
1921			/* seek */
1922	1/2 ✓ Branch 1 taken 24 times. ✗ Branch 2 not taken.	24	if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1923			/* We don't want to lose our seekhead level, so we add
1924			* a dummy. This is a crude hack. */
1925	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (matroska->num_levels == EBML_MAX_DEPTH) {
1926		✗	av_log(matroska->ctx, AV_LOG_INFO,
1927			"Max EBML element depth (%d) reached, "
1928			"cannot parse further.\n", EBML_MAX_DEPTH);
1929		✗	ret = AVERROR_INVALIDDATA;
1930			} else {
1931		24	matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1932		24	matroska->num_levels++;
1933		24	matroska->current_id = 0;
1934
1935		24	ret = ebml_parse(matroska, matroska_segment, matroska);
1936	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (ret == LEVEL_ENDED) {
1937			/* This can only happen if the seek brought us beyond EOF. */
1938		2	ret = AVERROR_EOF;
1939			}
1940			}
1941			}
1942			/* Seek back - notice that in all instances where this is used
1943			* it is safe to set the level to 1. */
1944		24	ret2 = matroska_reset_status(matroska, saved_id, before_pos);
1945	2/2 ✓ Branch 0 taken 22 times. ✓ Branch 1 taken 2 times.	24	if (ret >= 0)
1946		22	ret = ret2;
1947
1948		24	return ret;
1949			}
1950
1951		372	static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1952			{
1953		372	EbmlList *seekhead_list = &matroska->seekhead;
1954			int i;
1955
1956			// we should not do any seeking in the streaming case
1957	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 371 times.	372	if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1958		1	return;
1959
1960	2/2 ✓ Branch 0 taken 1196 times. ✓ Branch 1 taken 370 times.	1566	for (i = 0; i < seekhead_list->nb_elem; i++) {
1961		1196	MatroskaSeekhead *seekheads = seekhead_list->elem;
1962		1196	uint32_t id = seekheads[i].id;
1963		1196	int64_t pos = seekheads[i].pos + matroska->segment_start;
1964			MatroskaLevel1Element *elem;
1965
1966	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)
1967		✗	continue;
1968
1969		1196	elem = matroska_find_level1_elem(matroska, id, pos);
1970	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)
1971		855	continue;
1972
1973		341	elem->pos = pos;
1974
1975			// defer cues parsing until we actually need cue data.
1976	2/2 ✓ Branch 0 taken 329 times. ✓ Branch 1 taken 12 times.	341	if (id == MATROSKA_ID_CUES)
1977		329	continue;
1978
1979	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1980			// mark index as broken
1981		1	matroska->cues_parsing_deferred = -1;
1982		1	break;
1983			}
1984
1985		11	elem->parsed = 1;
1986			}
1987			}
1988
1989		385	static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1990			{
1991			EbmlList *index_list;
1992			MatroskaIndex *index;
1993		385	uint64_t index_scale = 1;
1994			int i, j;
1995
1996	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 385 times.	385	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1997		✗	return;
1998
1999		385	index_list = &matroska->index;
2000		385	index = index_list->elem;
2001	2/2 ✓ Branch 0 taken 367 times. ✓ Branch 1 taken 18 times.	385	if (index_list->nb_elem < 2)
2002		367	return;
2003	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 18 times.	18	if (index[1].time > 1E14 / matroska->time_scale) {
2004		✗	av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
2005		✗	return;
2006			}
2007	2/2 ✓ Branch 0 taken 538 times. ✓ Branch 1 taken 18 times.	556	for (i = 0; i < index_list->nb_elem; i++) {
2008		538	EbmlList *pos_list = &index[i].pos;
2009		538	MatroskaIndexPos *pos = pos_list->elem;
2010	2/2 ✓ Branch 0 taken 656 times. ✓ Branch 1 taken 538 times.	1194	for (j = 0; j < pos_list->nb_elem; j++) {
2011		656	MatroskaTrack *track = matroska_find_track_by_num(matroska,
2012		656	pos[j].track);
2013	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)
2014		656	av_add_index_entry(track->stream,
2015		656	pos[j].pos + matroska->segment_start,
2016		656	index[i].time / index_scale, 0, 0,
2017			AVINDEX_KEYFRAME);
2018			}
2019			}
2020			}
2021
2022		13	static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
2023			int i;
2024
2025	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 13 times.	13	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
2026		✗	return;
2027
2028	2/2 ✓ Branch 0 taken 53 times. ✓ Branch 1 taken 1 times.	54	for (i = 0; i < matroska->num_level1_elems; i++) {
2029		53	MatroskaLevel1Element *elem = &matroska->level1_elems[i];
2030	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) {
2031	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
2032		1	matroska->cues_parsing_deferred = -1;
2033		12	elem->parsed = 1;
2034		12	break;
2035			}
2036			}
2037
2038		13	matroska_add_index_entries(matroska);
2039			}
2040
2041		447	static int matroska_parse_content_encodings(MatroskaTrackEncoding *encodings,
2042			unsigned nb_encodings,
2043			MatroskaTrack *track,
2044			char **key_id_base64, void *logctx)
2045			{
2046	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (nb_encodings > 1) {
2047		✗	av_log(logctx, AV_LOG_ERROR,
2048			"Multiple combined encodings not supported\n");
2049		✗	return 0;
2050			}
2051	2/2 ✓ Branch 0 taken 435 times. ✓ Branch 1 taken 12 times.	447	if (!nb_encodings)
2052		435	return 0;
2053	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (encodings->type) {
2054		✗	if (encodings->encryption.key_id.size > 0) {
2055			/* Save the encryption key id to be stored later
2056			* as a metadata tag. */
2057		✗	const int b64_size = AV_BASE64_SIZE(encodings->encryption.key_id.size);
2058		✗	*key_id_base64 = av_malloc(b64_size);
2059		✗	if (!*key_id_base64)
2060		✗	return AVERROR(ENOMEM);
2061
2062		✗	av_base64_encode(*key_id_base64, b64_size,
2063		✗	encodings->encryption.key_id.data,
2064			encodings->encryption.key_id.size);
2065			} else {
2066		✗	encodings->scope = 0;
2067		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2068			}
2069		12	} else if (
2070			#if CONFIG_ZLIB
2071	2/2 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 3 times.	12	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2072			#endif
2073			#if CONFIG_BZLIB
2074	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 1 times.	9	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2075			#endif
2076	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 1 times.	8	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2077	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2078		✗	encodings->scope = 0;
2079		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2080	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) {
2081		1	uint8_t *codec_priv = track->codec_priv.data;
2082		1	int ret = matroska_decode_buffer(&track->codec_priv.data,
2083			&track->codec_priv.size,
2084			track);
2085	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0) {
2086		✗	track->codec_priv.data = NULL;
2087		✗	track->codec_priv.size = 0;
2088		✗	av_log(logctx, AV_LOG_ERROR,
2089			"Failed to decode codec private data\n");
2090			}
2091
2092	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (codec_priv != track->codec_priv.data) {
2093		1	av_buffer_unref(&track->codec_priv.buf);
2094	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.data) {
2095		2	track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2096		1	track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2097			NULL, NULL, 0);
2098	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (!track->codec_priv.buf) {
2099		✗	av_freep(&track->codec_priv.data);
2100		✗	track->codec_priv.size = 0;
2101		✗	return AVERROR(ENOMEM);
2102			}
2103			}
2104			}
2105			}
2106		36	track->needs_decoding = !encodings->type &&
2107	2/4 ✓ Branch 0 taken 12 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken.	24	encodings->scope & 1 &&
2108	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 5 times.	12	(encodings->compression.algo !=
2109		7	MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP ||
2110	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	encodings->compression.settings.size);
2111
2112		12	return 0;
2113			}
2114
2115		✗	static int matroska_aac_profile(char *codec_id)
2116			{
2117			static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
2118			int profile;
2119
2120		✗	for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
2121		✗	if (strstr(codec_id, aac_profiles[profile]))
2122		✗	break;
2123		✗	return profile + 1;
2124			}
2125
2126		✗	static int matroska_aac_sri(int samplerate)
2127			{
2128			int sri;
2129
2130		✗	for (sri = 0; sri < FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
2131		✗	if (ff_mpeg4audio_sample_rates[sri] == samplerate)
2132		✗	break;
2133		✗	return sri;
2134			}
2135
2136		18	static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
2137			{
2138			/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
2139		18	ff_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
2140		18	}
2141
2142		9	static int matroska_parse_flac(AVFormatContext *s,
2143			MatroskaTrack *track,
2144			int *offset)
2145			{
2146		9	AVStream *st = track->stream;
2147		9	uint8_t *p = track->codec_priv.data;
2148		9	int size = track->codec_priv.size;
2149
2150	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) {
2151		✗	av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
2152		✗	track->codec_priv.size = 0;
2153		✗	return 0;
2154			}
2155		9	*offset = 8;
2156		9	track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
2157
2158		9	p += track->codec_priv.size;
2159		9	size -= track->codec_priv.size;
2160
2161			/* parse the remaining metadata blocks if present */
2162	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 9 times.	17	while (size >= 4) {
2163			int block_last, block_type, block_size;
2164
2165		8	flac_parse_block_header(p, &block_last, &block_type, &block_size);
2166
2167		8	p += 4;
2168		8	size -= 4;
2169	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (block_size > size)
2170		✗	return 0;
2171
2172			/* check for the channel mask */
2173	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
2174		8	AVDictionary *dict = NULL;
2175			AVDictionaryEntry *chmask;
2176
2177		8	ff_vorbis_comment(s, &dict, p, block_size, 0);
2178		8	chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2179	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (chmask) {
2180		8	uint64_t mask = strtol(chmask->value, NULL, 0);
2181	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) {
2182		✗	av_log(s, AV_LOG_WARNING,
2183			"Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2184			} else
2185		8	av_channel_layout_from_mask(&st->codecpar->ch_layout, mask);
2186			}
2187		8	av_dict_free(&dict);
2188			}
2189
2190		8	p += block_size;
2191		8	size -= block_size;
2192			}
2193
2194		9	return 0;
2195			}
2196
2197		7	static int mkv_field_order(const MatroskaDemuxContext *matroska, uint64_t field_order)
2198			{
2199		7	int minor, micro, bttb = 0;
2200
2201			/* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2202			* this function, and fixed in 57.52 */
2203	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)
2204		✗	bttb = (minor >= 36 && minor <= 51 && micro >= 100);
2205
2206	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) {
2207		✗	case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
2208		✗	return AV_FIELD_PROGRESSIVE;
2209		✗	case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
2210		✗	return AV_FIELD_UNKNOWN;
2211		6	case MATROSKA_VIDEO_FIELDORDER_TT:
2212		6	return AV_FIELD_TT;
2213		1	case MATROSKA_VIDEO_FIELDORDER_BB:
2214		1	return AV_FIELD_BB;
2215		✗	case MATROSKA_VIDEO_FIELDORDER_BT:
2216		✗	return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2217		✗	case MATROSKA_VIDEO_FIELDORDER_TB:
2218		✗	return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2219		✗	default:
2220		✗	return AV_FIELD_UNKNOWN;
2221			}
2222			}
2223
2224		12	static void mkv_stereo_mode_display_mul(int stereo_mode,
2225			int *h_width, int *h_height)
2226			{
2227	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) {
2228		✗	case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
2229			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
2230			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
2231			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
2232			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
2233		✗	break;
2234		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
2235			case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
2236			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
2237			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
2238		4	*h_width = 2;
2239		4	break;
2240		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
2241			case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
2242			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
2243			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
2244		4	*h_height = 2;
2245		4	break;
2246			}
2247		12	}
2248
2249		236	static int mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
2250			{
2251			static const struct {
2252			char type;
2253			char flags;
2254			} stereo_mode_conv [] = {
2255			#define STEREO_MODE_CONV(STEREOMODETYPE, STEREO3DTYPE, FLAGS, WDIV, HDIV, WEBM) \
2256			[(STEREOMODETYPE)] = { .type = (STEREO3DTYPE), .flags = (FLAGS) },
2257			#define NOTHING(STEREOMODETYPE, WDIV, HDIV, WEBM)
2258			STEREOMODE_STEREO3D_MAPPING(STEREO_MODE_CONV, NOTHING)
2259			};
2260			AVStereo3D *stereo;
2261			size_t size;
2262
2263		236	stereo = av_stereo3d_alloc_size(&size);
2264	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (!stereo)
2265		✗	return AVERROR(ENOMEM);
2266
2267		236	stereo->type = stereo_mode_conv[stereo_mode].type;
2268		236	stereo->flags = stereo_mode_conv[stereo_mode].flags;
2269
2270	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,
2271			AV_PKT_DATA_STEREO3D, stereo, size, 0)) {
2272		✗	av_freep(&stereo);
2273		✗	return AVERROR(ENOMEM);
2274			}
2275
2276		236	return 0;
2277			}
2278
2279		339	static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2280		339	const MatroskaTrackVideoColor *color = track->video.color.elem;
2281			const MatroskaMasteringMeta *mastering_meta;
2282			int has_mastering_primaries, has_mastering_luminance;
2283
2284	2/2 ✓ Branch 0 taken 275 times. ✓ Branch 1 taken 64 times.	339	if (!track->video.color.nb_elem)
2285		275	return 0;
2286
2287		64	mastering_meta = &color->mastering_meta;
2288			// Mastering primaries are CIE 1931 coords, and must be > 0.
2289		64	has_mastering_primaries =
2290	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2291	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 &&
2292	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 &&
2293	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;
2294		128	has_mastering_luminance = mastering_meta->max_luminance >
2295		71	mastering_meta->min_luminance.el.f &&
2296	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 &&
2297	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->min_luminance.count;
2298
2299	1/2 ✓ Branch 0 taken 64 times. ✗ Branch 1 not taken.	64	if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2300		64	st->codecpar->color_space = color->matrix_coefficients;
2301	1/2 ✓ Branch 0 taken 64 times. ✗ Branch 1 not taken.	64	if (color->primaries != AVCOL_PRI_RESERVED &&
2302	2/2 ✓ Branch 0 taken 62 times. ✓ Branch 1 taken 2 times.	64	color->primaries != AVCOL_PRI_RESERVED0)
2303		62	st->codecpar->color_primaries = color->primaries;
2304	1/2 ✓ Branch 0 taken 64 times. ✗ Branch 1 not taken.	64	if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2305	2/2 ✓ Branch 0 taken 62 times. ✓ Branch 1 taken 2 times.	64	color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2306		62	st->codecpar->color_trc = color->transfer_characteristics;
2307	2/2 ✓ Branch 0 taken 44 times. ✓ Branch 1 taken 20 times.	64	if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2308	1/2 ✓ Branch 0 taken 44 times. ✗ Branch 1 not taken.	44	color->range <= AVCOL_RANGE_JPEG)
2309		44	st->codecpar->color_range = color->range;
2310	2/2 ✓ Branch 0 taken 43 times. ✓ Branch 1 taken 21 times.	64	if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2311	1/2 ✓ Branch 0 taken 43 times. ✗ Branch 1 not taken.	43	color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2312	1/2 ✓ Branch 0 taken 43 times. ✗ Branch 1 not taken.	43	color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2313	1/2 ✓ Branch 0 taken 43 times. ✗ Branch 1 not taken.	43	color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2314		43	st->codecpar->chroma_location =
2315		43	av_chroma_location_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2316		43	(color->chroma_siting_vert - 1) << 7);
2317			}
2318	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) {
2319		7	size_t size = 0;
2320		7	AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
2321	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2322		✗	return AVERROR(ENOMEM);
2323	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,
2324			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, metadata, size, 0)) {
2325		✗	av_freep(&metadata);
2326		✗	return AVERROR(ENOMEM);
2327			}
2328		7	metadata->MaxCLL = color->max_cll;
2329		7	metadata->MaxFALL = color->max_fall;
2330			}
2331
2332	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) {
2333		7	size_t size = 0;
2334		7	AVMasteringDisplayMetadata *metadata = av_mastering_display_metadata_alloc_size(&size);
2335	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2336		✗	return AVERROR(ENOMEM);
2337	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,
2338			AV_PKT_DATA_MASTERING_DISPLAY_METADATA, metadata, size, 0)) {
2339		✗	av_freep(&metadata);
2340		✗	return AVERROR(ENOMEM);
2341			}
2342	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_primaries) {
2343		7	metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
2344		7	metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
2345		7	metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
2346		7	metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
2347		7	metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
2348		7	metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
2349		7	metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
2350		7	metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
2351		7	metadata->has_primaries = 1;
2352			}
2353	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_luminance) {
2354		7	metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
2355		7	metadata->min_luminance = av_d2q(mastering_meta->min_luminance.el.f, INT_MAX);
2356		7	metadata->has_luminance = 1;
2357			}
2358			}
2359		64	return 0;
2360			}
2361
2362		333	static int mkv_create_display_matrix(AVStream *st,
2363			const MatroskaTrackVideoProjection *proj,
2364			void *logctx)
2365			{
2366			AVPacketSideData *sd;
2367		333	double pitch = proj->pitch, yaw = proj->yaw, roll = proj->roll;
2368			int32_t *matrix;
2369			int hflip;
2370
2371	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)
2372		324	return 0;
2373
2374			/* Note: The following constants are exactly representable
2375			* as floating-point numbers. */
2376	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) ||
2377			isnan(roll)) {
2378		✗	av_log(logctx, AV_LOG_WARNING, "Ignoring non-2D rectangular "
2379			"projection in stream %u (yaw %f, pitch %f, roll %f)\n",
2380			st->index, yaw, pitch, roll);
2381		✗	return 0;
2382			}
2383		9	sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2384		9	&st->codecpar->nb_coded_side_data,
2385			AV_PKT_DATA_DISPLAYMATRIX,
2386			9 * sizeof(*matrix), 0);
2387	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 9 times.	9	if (!sd)
2388		✗	return AVERROR(ENOMEM);
2389		9	matrix = (int32_t*)sd->data;
2390
2391		9	hflip = yaw != 0.0;
2392			/* ProjectionPoseRoll is in the counter-clockwise direction
2393			* whereas av_display_rotation_set() expects its argument
2394			* to be oriented clockwise, so we need to negate roll.
2395			* Furthermore, if hflip is set, we need to negate it again
2396			* to account for the fact that the Matroska specifications
2397			* require the yaw rotation to be applied first. */
2398		9	av_display_rotation_set(matrix, roll * (2 * hflip - 1));
2399		9	av_display_matrix_flip(matrix, hflip, 0);
2400
2401		9	return 0;
2402			}
2403
2404		339	static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track,
2405			void *logctx)
2406			{
2407			AVSphericalMapping *spherical;
2408		339	const MatroskaTrackVideoProjection *mkv_projection = &track->video.projection;
2409		339	const uint8_t *priv_data = mkv_projection->private.data;
2410			enum AVSphericalProjection projection;
2411			size_t spherical_size;
2412		339	uint32_t l = 0, t = 0, r = 0, b = 0;
2413		339	uint32_t padding = 0;
2414
2415	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) {
2416		✗	av_log(logctx, AV_LOG_WARNING, "Unknown spherical metadata\n");
2417		✗	return 0;
2418			}
2419
2420	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) {
2421		333	case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2422		333	return mkv_create_display_matrix(st, mkv_projection, logctx);
2423		6	case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2424	1/2 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken.	6	if (track->video.projection.private.size == 20) {
2425		6	t = AV_RB32(priv_data + 4);
2426		6	b = AV_RB32(priv_data + 8);
2427		6	l = AV_RB32(priv_data + 12);
2428		6	r = AV_RB32(priv_data + 16);
2429
2430	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) {
2431		✗	av_log(logctx, AV_LOG_ERROR,
2432			"Invalid bounding rectangle coordinates "
2433			"%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2434			l, t, r, b);
2435		✗	return AVERROR_INVALIDDATA;
2436			}
2437		✗	} else if (track->video.projection.private.size != 0) {
2438		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2439		✗	return AVERROR_INVALIDDATA;
2440			}
2441
2442	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)
2443		6	projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2444			else
2445		✗	projection = AV_SPHERICAL_EQUIRECTANGULAR;
2446		6	break;
2447		✗	case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2448		✗	if (track->video.projection.private.size < 4) {
2449		✗	av_log(logctx, AV_LOG_ERROR, "Missing projection private properties\n");
2450		✗	return AVERROR_INVALIDDATA;
2451		✗	} else if (track->video.projection.private.size == 12) {
2452		✗	uint32_t layout = AV_RB32(priv_data + 4);
2453		✗	if (layout) {
2454		✗	av_log(logctx, AV_LOG_WARNING,
2455			"Unknown spherical cubemap layout %"PRIu32"\n", layout);
2456		✗	return 0;
2457			}
2458		✗	projection = AV_SPHERICAL_CUBEMAP;
2459		✗	padding = AV_RB32(priv_data + 8);
2460			} else {
2461		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2462		✗	return AVERROR_INVALIDDATA;
2463			}
2464		✗	break;
2465		✗	default:
2466		✗	av_log(logctx, AV_LOG_WARNING,
2467			"Unknown spherical metadata type %"PRIu64"\n",
2468		✗	track->video.projection.type);
2469		✗	return 0;
2470			}
2471
2472		6	spherical = av_spherical_alloc(&spherical_size);
2473	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!spherical)
2474		✗	return AVERROR(ENOMEM);
2475
2476		6	spherical->projection = projection;
2477
2478		6	spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2479		6	spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2480		6	spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2481
2482		6	spherical->padding = padding;
2483
2484		6	spherical->bound_left = l;
2485		6	spherical->bound_top = t;
2486		6	spherical->bound_right = r;
2487		6	spherical->bound_bottom = b;
2488
2489	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,
2490			AV_PKT_DATA_SPHERICAL, spherical, spherical_size, 0)) {
2491		✗	av_freep(&spherical);
2492		✗	return AVERROR(ENOMEM);
2493			}
2494
2495		6	return 0;
2496			}
2497
2498		4	static int mkv_parse_dvcc_dvvc(AVFormatContext *s, AVStream *st, const MatroskaTrack *track,
2499			EbmlBin *bin)
2500			{
2501		4	return ff_isom_parse_dvcc_dvvc(s, st, bin->data, bin->size);
2502			}
2503
2504		447	static int mkv_parse_block_addition_mappings(AVFormatContext *s, AVStream *st, MatroskaTrack *track)
2505			{
2506		447	const EbmlList *mappings_list = &track->block_addition_mappings;
2507		447	MatroskaBlockAdditionMapping *mappings = mappings_list->elem;
2508			int ret;
2509
2510	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 447 times.	453	for (int i = 0; i < mappings_list->nb_elem; i++) {
2511		6	MatroskaBlockAdditionMapping *mapping = &mappings[i];
2512		6	uint64_t type = mapping->type;
2513
2514	2/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	6	switch (mapping->type) {
2515		✗	case MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT:
2516		✗	av_log(s, AV_LOG_DEBUG,
2517			"Explicit block Addition Mapping type \"Use BlockAddIDValue\", value %"PRIu64","
2518		✗	" name \"%s\" found.\n", mapping->value, mapping->name ? mapping->name : "");
2519		✗	type = MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE;
2520			// fall-through
2521		2	case MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE:
2522			case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35:
2523	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (mapping->value != type) {
2524		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2525		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2526			"Invalid Block Addition Value 0x%"PRIx64" for Block Addition Mapping Type "
2527			"0x%"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2528		✗	mapping->name ? mapping->name : "");
2529		✗	if (strict)
2530		✗	return AVERROR_INVALIDDATA;
2531			}
2532		2	break;
2533		4	case MATROSKA_BLOCK_ADD_ID_TYPE_DVCC:
2534			case MATROSKA_BLOCK_ADD_ID_TYPE_DVVC:
2535	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if ((ret = mkv_parse_dvcc_dvvc(s, st, track, &mapping->extradata)) < 0)
2536		✗	return ret;
2537
2538		4	break;
2539		✗	default:
2540		✗	av_log(s, AV_LOG_DEBUG,
2541			"Unknown Block Addition Mapping type 0x%"PRIx64", value %"PRIu64", name \"%s\"\n",
2542		✗	mapping->type, mapping->value, mapping->name ? mapping->name : "");
2543		✗	if (mapping->value < 2) {
2544		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2545		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2546			"Invalid Block Addition value 0x%"PRIu64" for unknown Block Addition Mapping "
2547			"type %"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2548		✗	mapping->name ? mapping->name : "");
2549		✗	if (strict)
2550		✗	return AVERROR_INVALIDDATA;
2551			}
2552		✗	break;
2553			}
2554			}
2555
2556		447	return 0;
2557			}
2558
2559		1	static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2560			{
2561			const AVCodecTag *codec_tags;
2562
2563		2	codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2564	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2565
2566			/* Normalize noncompliant private data that starts with the fourcc
2567			* by expanding/shifting the data by 4 bytes and storing the data
2568			* size at the start. */
2569	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))) {
2570		✗	int ret = av_buffer_realloc(&track->codec_priv.buf,
2571		✗	track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2572		✗	if (ret < 0)
2573		✗	return ret;
2574
2575		✗	track->codec_priv.data = track->codec_priv.buf->data;
2576		✗	memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2577		✗	track->codec_priv.size += 4;
2578		✗	AV_WB32(track->codec_priv.data, track->codec_priv.size);
2579			}
2580
2581		1	*fourcc = AV_RL32(track->codec_priv.data + 4);
2582		1	*codec_id = ff_codec_get_id(codec_tags, *fourcc);
2583
2584		1	return 0;
2585			}
2586
2587			/* An enum with potential return values of the functions for parsing a track.
2588			* Apart from that all these functions can also indicate ordinary errors via
2589			* negative return values. */
2590			enum {
2591			SKIP_TRACK = 1,
2592			};
2593
2594			#define AAC_MAX_EXTRADATA_SIZE 5
2595			#define TTA_EXTRADATA_SIZE 22
2596			#define WAVPACK_EXTRADATA_SIZE 2
2597			/* Performs the codec-specific part of parsing an audio track. */
2598		84	static int mka_parse_audio_codec(MatroskaTrack *track, AVCodecParameters *par,
2599			const MatroskaDemuxContext *matroska,
2600			AVFormatContext *s, int *extradata_offset)
2601			{
2602			uint8_t extradata[FFMAX3(AAC_MAX_EXTRADATA_SIZE,
2603			TTA_EXTRADATA_SIZE,
2604			WAVPACK_EXTRADATA_SIZE)];
2605		84	int extradata_size = 0; // > 0 means that the extradata buffer is used
2606			int ret;
2607
2608	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 83 times.	84	if (!strcmp(track->codec_id, "A_MS/ACM") &&
2609	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 14) {
2610			FFIOContext b;
2611		1	ffio_init_read_context(&b, track->codec_priv.data,
2612			track->codec_priv.size);
2613		1	ret = ff_get_wav_header(s, &b.pub, par,
2614			track->codec_priv.size, 0);
2615	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2616		✗	return ret;
2617		1	*extradata_offset = FFMIN(track->codec_priv.size, 18);
2618		1	return 0;
2619	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	} else if (!strcmp(track->codec_id, "A_QUICKTIME") &&
2620			/* Normally 36, but allow noncompliant private data */
2621		✗	track->codec_priv.size >= 32) {
2622			enum AVCodecID codec_id;
2623			uint32_t fourcc;
2624			uint16_t sample_size;
2625
2626		✗	ret = get_qt_codec(track, &fourcc, &codec_id);
2627		✗	if (ret < 0)
2628		✗	return ret;
2629		✗	sample_size = AV_RB16(track->codec_priv.data + 26);
2630		✗	if (fourcc == 0) {
2631		✗	if (sample_size == 8) {
2632		✗	fourcc = MKTAG('r','a','w',' ');
2633		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2634		✗	} else if (sample_size == 16) {
2635		✗	fourcc = MKTAG('t','w','o','s');
2636		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2637			}
2638			}
2639		✗	if ((fourcc == MKTAG('t','w','o','s') ||
2640		✗	fourcc == MKTAG('s','o','w','t')) && sample_size == 8)
2641		✗	codec_id = AV_CODEC_ID_PCM_S8;
2642		✗	par->codec_id = codec_id;
2643		✗	par->codec_tag = fourcc;
2644		✗	return 0;
2645			}
2646
2647	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) {
2648		5	case AV_CODEC_ID_PCM_S16BE:
2649	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) {
2650		✗	case 8:
2651		✗	par->codec_id = AV_CODEC_ID_PCM_U8;
2652		✗	break;
2653		1	case 24:
2654		1	par->codec_id = AV_CODEC_ID_PCM_S24BE;
2655		1	break;
2656		2	case 32:
2657		2	par->codec_id = AV_CODEC_ID_PCM_S32BE;
2658		2	break;
2659			}
2660		5	break;
2661		7	case AV_CODEC_ID_PCM_S16LE:
2662	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) {
2663		1	case 8:
2664		1	par->codec_id = AV_CODEC_ID_PCM_U8;
2665		1	break;
2666		3	case 24:
2667		3	par->codec_id = AV_CODEC_ID_PCM_S24LE;
2668		3	break;
2669		2	case 32:
2670		2	par->codec_id = AV_CODEC_ID_PCM_S32LE;
2671		2	break;
2672			}
2673		7	break;
2674		✗	case AV_CODEC_ID_PCM_F32LE:
2675		✗	if (track->audio.bitdepth == 64)
2676		✗	par->codec_id = AV_CODEC_ID_PCM_F64LE;
2677		✗	break;
2678		12	case AV_CODEC_ID_AAC:
2679	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!track->codec_priv.size) {
2680		✗	int profile = matroska_aac_profile(track->codec_id);
2681		✗	int sri = matroska_aac_sri(track->audio.samplerate);
2682
2683		✗	extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2684		✗	extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2685		✗	if (strstr(track->codec_id, "SBR")) {
2686		✗	sri = matroska_aac_sri(track->audio.out_samplerate);
2687		✗	extradata[2] = 0x56;
2688		✗	extradata[3] = 0xE5;
2689		✗	extradata[4] = 0x80 | (sri << 3);
2690		✗	extradata_size = 5;
2691			} else
2692		✗	extradata_size = 2;
2693			}
2694		12	break;
2695		2	case AV_CODEC_ID_ALAC:
2696	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) {
2697			/* Only ALAC's magic cookie is stored in Matroska's track headers.
2698			* Create the "atom size", "tag", and "tag version" fields the
2699			* decoder expects manually. */
2700		2	ret = ff_alloc_extradata(par, 12 + track->codec_priv.size);
2701	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (ret < 0)
2702		✗	return ret;
2703		2	AV_WB32(par->extradata, par->extradata_size);
2704		2	AV_WB32(&par->extradata[4], MKBETAG('a', 'l', 'a', 'c'));
2705		2	AV_WB32(&par->extradata[8], 0);
2706		2	memcpy(&par->extradata[12], track->codec_priv.data,
2707		2	track->codec_priv.size);
2708			}
2709		2	break;
2710		3	case AV_CODEC_ID_TTA:
2711			{
2712			uint8_t *ptr;
2713	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (track->audio.channels > UINT16_MAX ||
2714	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	track->audio.bitdepth > UINT16_MAX) {
2715		✗	av_log(matroska->ctx, AV_LOG_WARNING,
2716			"Too large audio channel number %"PRIu64
2717			" or bitdepth %"PRIu64". Skipping track.\n",
2718			track->audio.channels, track->audio.bitdepth);
2719		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2720		✗	return AVERROR_INVALIDDATA;
2721			else
2722		✗	return SKIP_TRACK;
2723			}
2724	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)
2725		✗	return AVERROR_INVALIDDATA;
2726		3	extradata_size = TTA_EXTRADATA_SIZE;
2727		3	ptr = extradata;
2728		3	bytestream_put_be32(&ptr, AV_RB32("TTA1"));
2729		3	bytestream_put_le16(&ptr, 1);
2730		3	bytestream_put_le16(&ptr, track->audio.channels);
2731		3	bytestream_put_le16(&ptr, track->audio.bitdepth);
2732		3	bytestream_put_le32(&ptr, track->audio.out_samplerate);
2733		3	bytestream_put_le32(&ptr, av_rescale(matroska->duration * matroska->time_scale,
2734		3	track->audio.out_samplerate,
2735			AV_TIME_BASE * 1000));
2736		3	break;
2737			}
2738		✗	case AV_CODEC_ID_RA_144:
2739		✗	track->audio.out_samplerate = 8000;
2740		✗	track->audio.channels = 1;
2741		✗	break;
2742		✗	case AV_CODEC_ID_RA_288:
2743			case AV_CODEC_ID_COOK:
2744			case AV_CODEC_ID_ATRAC3:
2745			case AV_CODEC_ID_SIPR:
2746			{
2747		✗	const uint8_t *ptr = track->codec_priv.data;
2748			int flavor;
2749
2750		✗	if (!track->codec_priv.size)
2751		✗	break;
2752
2753		✗	if (track->codec_priv.size < 46)
2754		✗	return AVERROR_INVALIDDATA;
2755		✗	ptr += 22;
2756		✗	flavor = bytestream_get_be16(&ptr);
2757		✗	track->audio.coded_framesize = bytestream_get_be32(&ptr);
2758		✗	ptr += 12;
2759		✗	track->audio.sub_packet_h = bytestream_get_be16(&ptr);
2760		✗	track->audio.frame_size = bytestream_get_be16(&ptr);
2761		✗	track->audio.sub_packet_size = bytestream_get_be16(&ptr);
2762		✗	if (track->audio.coded_framesize <= 0 ||
2763		✗	track->audio.sub_packet_h <= 0 ||
2764		✗	track->audio.frame_size <= 0)
2765		✗	return AVERROR_INVALIDDATA;
2766
2767		✗	if (par->codec_id == AV_CODEC_ID_RA_288) {
2768		✗	if (track->audio.sub_packet_h & 1 || 2 * track->audio.frame_size
2769		✗	!= (int64_t)track->audio.sub_packet_h * track->audio.coded_framesize)
2770		✗	return AVERROR_INVALIDDATA;
2771		✗	par->block_align = track->audio.coded_framesize;
2772		✗	track->codec_priv.size = 0;
2773			} else {
2774		✗	if (par->codec_id == AV_CODEC_ID_SIPR) {
2775			static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2776		✗	if (flavor > 3)
2777		✗	return AVERROR_INVALIDDATA;
2778		✗	track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2779		✗	par->bit_rate = sipr_bit_rate[flavor];
2780		✗	} else if (track->audio.sub_packet_size <= 0 ||
2781		✗	track->audio.frame_size % track->audio.sub_packet_size)
2782		✗	return AVERROR_INVALIDDATA;
2783		✗	par->block_align = track->audio.sub_packet_size;
2784		✗	*extradata_offset = 78;
2785			}
2786		✗	track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2787		✗	track->audio.frame_size);
2788		✗	if (!track->audio.buf)
2789		✗	return AVERROR(ENOMEM);
2790		✗	break;
2791			}
2792		1	case AV_CODEC_ID_ATRAC1:
2793			/* ATRAC1 uses a constant frame size.
2794			* Typical ATRAC1 streams are either mono or stereo.
2795			* At most, ATRAC1 was used to store 8 channels of audio. */
2796	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (track->audio.channels > 8)
2797		✗	return AVERROR_INVALIDDATA;
2798		1	par->block_align = track->audio.channels * 212;
2799		1	break;
2800		9	case AV_CODEC_ID_FLAC:
2801	1/2 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken.	9	if (track->codec_priv.size) {
2802		9	ret = matroska_parse_flac(s, track, extradata_offset);
2803	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 9 times.	9	if (ret < 0)
2804		✗	return ret;
2805			}
2806		9	break;
2807		2	case AV_CODEC_ID_WAVPACK:
2808	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 1 times.	2	if (track->codec_priv.size < 2) {
2809		1	av_log(matroska->ctx, AV_LOG_INFO, "Assuming WavPack version 4.10 "
2810			"in absence of valid CodecPrivate.\n");
2811		1	extradata_size = WAVPACK_EXTRADATA_SIZE;
2812		1	AV_WL16(extradata, 0x410);
2813			}
2814		2	break;
2815			}
2816
2817	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 79 times.	83	if (extradata_size > 0) {
2818		4	ret = ff_alloc_extradata(par, extradata_size);
2819	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (ret < 0)
2820		✗	return ret;
2821		4	memcpy(par->extradata, extradata, extradata_size);
2822			}
2823
2824		83	return 0;
2825			}
2826
2827			/* Performs the generic part of parsing an audio track. */
2828		84	static int mka_parse_audio(MatroskaTrack *track, AVStream *st,
2829			AVCodecParameters *par,
2830			const MatroskaDemuxContext *matroska,
2831			AVFormatContext *s, int *extradata_offset)
2832			{
2833		84	FFStream *const sti = ffstream(st);
2834			int ret;
2835
2836		84	ret = mka_parse_audio_codec(track, par, matroska,
2837			s, extradata_offset);
2838	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret)
2839		✗	return ret;
2840
2841		84	par->codec_type = AVMEDIA_TYPE_AUDIO;
2842		84	par->sample_rate = track->audio.out_samplerate;
2843			// channel layout may be already set by codec private checks above
2844	2/2 ✓ Branch 1 taken 75 times. ✓ Branch 2 taken 9 times.	84	if (!av_channel_layout_check(&par->ch_layout)) {
2845	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 75 times.	75	if (track->audio.channels > INT32_MAX)
2846		✗	return AVERROR_PATCHWELCOME;
2847		75	par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
2848		75	par->ch_layout.nb_channels = track->audio.channels;
2849			}
2850	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!par->bits_per_coded_sample)
2851		83	par->bits_per_coded_sample = track->audio.bitdepth;
2852	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (par->codec_id == AV_CODEC_ID_MP3 ||
2853	1/2 ✓ Branch 0 taken 83 times. ✗ Branch 1 not taken.	83	par->codec_id == AV_CODEC_ID_MLP ||
2854	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	par->codec_id == AV_CODEC_ID_TRUEHD)
2855		1	sti->need_parsing = AVSTREAM_PARSE_FULL;
2856	2/2 ✓ Branch 0 taken 71 times. ✓ Branch 1 taken 12 times.	83	else if (par->codec_id != AV_CODEC_ID_AAC)
2857		71	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
2858	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 73 times.	84	if (track->codec_delay > 0) {
2859		11	par->initial_padding = av_rescale_q(track->codec_delay,
2860		11	(AVRational){1, 1000000000},
2861		11	(AVRational){1, par->codec_id == AV_CODEC_ID_OPUS ?
2862	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 6 times.	11	48000 : par->sample_rate});
2863			}
2864	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 77 times.	84	if (track->seek_preroll > 0) {
2865		7	par->seek_preroll = av_rescale_q(track->seek_preroll,
2866		7	(AVRational){1, 1000000000},
2867		7	(AVRational){1, par->sample_rate});
2868			}
2869
2870		84	return 0;
2871			}
2872
2873			/* Performs the codec-specific part of parsing a video track. */
2874		339	static int mkv_parse_video_codec(MatroskaTrack *track, AVCodecParameters *par,
2875			const MatroskaDemuxContext *matroska,
2876			int *extradata_offset)
2877			{
2878	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 334 times.	339	if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2879	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	track->codec_priv.size >= 40) {
2880		5	uint32_t size = AV_RL32A(track->codec_priv.data);
2881			// VFW extradata is padded to an even length, yet
2882			// the size field contains the real length.
2883	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)
2884		✗	--track->codec_priv.size;
2885		5	track->ms_compat = 1;
2886		5	par->bits_per_coded_sample = AV_RL16(track->codec_priv.data + 14);
2887		5	par->codec_tag = AV_RL32(track->codec_priv.data + 16);
2888		5	par->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2889			par->codec_tag);
2890	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times.	5	if (!par->codec_id)
2891		✗	par->codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2892			par->codec_tag);
2893		5	*extradata_offset = 40;
2894		5	return 0;
2895	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 333 times.	334	} else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2896	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 21) {
2897			enum AVCodecID codec_id;
2898			uint32_t fourcc;
2899		1	int ret = get_qt_codec(track, &fourcc, &codec_id);
2900	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2901		✗	return ret;
2902	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 ")) {
2903		✗	fourcc = MKTAG('S','V','Q','3');
2904		✗	codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2905			}
2906		1	par->codec_id = codec_id;
2907	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (codec_id == AV_CODEC_ID_NONE)
2908		✗	av_log(matroska->ctx, AV_LOG_ERROR,
2909		✗	"mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2910	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.size >= 86) {
2911			FFIOContext b;
2912		1	unsigned bit_depth = AV_RB16(track->codec_priv.data + 82);
2913		1	ffio_init_read_context(&b, track->codec_priv.data,
2914			track->codec_priv.size);
2915	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (ff_get_qtpalette(codec_id, &b.pub, track->palette)) {
2916		✗	bit_depth &= 0x1F;
2917		✗	track->has_palette = 1;
2918			}
2919		1	par->bits_per_coded_sample = bit_depth;
2920			}
2921		1	par->codec_tag = fourcc;
2922		1	return 0;
2923			}
2924
2925	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) {
2926		✗	case AV_CODEC_ID_RV10:
2927			case AV_CODEC_ID_RV20:
2928			case AV_CODEC_ID_RV30:
2929			case AV_CODEC_ID_RV40:
2930		✗	*extradata_offset = 26;
2931		✗	break;
2932		5	case AV_CODEC_ID_PRORES:
2933	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	if (track->codec_priv.size == 4)
2934		5	par->codec_tag = AV_RL32(track->codec_priv.data);
2935		5	break;
2936		249	case AV_CODEC_ID_VP9:
2937			/* we don't need any value stored in CodecPrivate.
2938			* make sure that it's not exported as extradata. */
2939		249	track->codec_priv.size = 0;
2940		249	break;
2941			}
2942
2943		333	return 0;
2944			}
2945
2946			/* Performs the generic part of parsing a video track. */
2947		339	static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
2948			AVCodecParameters *par,
2949			const MatroskaDemuxContext *matroska,
2950			int *extradata_offset)
2951			{
2952		339	FFStream *const sti = ffstream(st);
2953			MatroskaTrackPlane *planes;
2954		339	int display_width_mul = 1;
2955		339	int display_height_mul = 1;
2956			int ret;
2957
2958	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 335 times.	339	if (track->video.color_space.size == 4)
2959		4	par->codec_tag = AV_RL32(track->video.color_space.data);
2960
2961		339	ret = mkv_parse_video_codec(track, par, matroska,
2962			extradata_offset);
2963	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
2964		✗	return ret;
2965
2966		339	par->codec_type = AVMEDIA_TYPE_VIDEO;
2967		339	par->width = track->video.pixel_width;
2968		339	par->height = track->video.pixel_height;
2969
2970	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 332 times.	339	if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2971		7	par->field_order = mkv_field_order(matroska, track->video.field_order);
2972	2/2 ✓ Branch 0 taken 21 times. ✓ Branch 1 taken 311 times.	332	else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2973		21	par->field_order = AV_FIELD_PROGRESSIVE;
2974
2975	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)
2976		12	mkv_stereo_mode_display_mul(track->video.stereo_mode,
2977			&display_width_mul, &display_height_mul);
2978
2979	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 28 times.	339	if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2980	2/4 ✓ Branch 0 taken 311 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 311 times. ✗ Branch 3 not taken.	311	if (track->video.display_width && track->video.display_height &&
2981	2/4 ✓ Branch 0 taken 311 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 311 times. ✗ Branch 3 not taken.	311	track->video.display_width != -1 && track->video.display_height != -1 &&
2982	1/2 ✓ Branch 0 taken 311 times. ✗ Branch 1 not taken.	311	track->video.cropped_height < INT64_MAX / track->video.display_width / display_width_mul &&
2983	1/2 ✓ Branch 0 taken 311 times. ✗ Branch 1 not taken.	311	track->video.cropped_width < INT64_MAX / track->video.display_height / display_height_mul)
2984		311	av_reduce(&st->sample_aspect_ratio.num,
2985			&st->sample_aspect_ratio.den,
2986		311	track->video.cropped_height * track->video.display_width * display_width_mul,
2987		311	track->video.cropped_width * track->video.display_height * display_height_mul,
2988			INT_MAX);
2989			}
2990	2/2 ✓ Branch 0 taken 335 times. ✓ Branch 1 taken 4 times.	339	if (track->video.cropped_width != track->video.pixel_width ||
2991	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 335 times.	335	track->video.cropped_height != track->video.pixel_height) {
2992			uint8_t *cropping;
2993		4	AVPacketSideData *sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2994		4	&st->codecpar->nb_coded_side_data,
2995			AV_PKT_DATA_FRAME_CROPPING,
2996			sizeof(uint32_t) * 4, 0);
2997	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (!sd)
2998		✗	return AVERROR(ENOMEM);
2999
3000		4	cropping = sd->data;
3001		4	bytestream_put_le32(&cropping, track->video.pixel_cropt);
3002		4	bytestream_put_le32(&cropping, track->video.pixel_cropb);
3003		4	bytestream_put_le32(&cropping, track->video.pixel_cropl);
3004		4	bytestream_put_le32(&cropping, track->video.pixel_cropr);
3005			}
3006	2/2 ✓ Branch 0 taken 326 times. ✓ Branch 1 taken 13 times.	339	if (par->codec_id != AV_CODEC_ID_HEVC)
3007		326	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
3008
3009	2/2 ✓ Branch 0 taken 297 times. ✓ Branch 1 taken 42 times.	339	if (track->default_duration) {
3010	1/2 ✓ Branch 0 taken 297 times. ✗ Branch 1 not taken.	297	int div = track->default_duration <= INT64_MAX ? 1 : 2;
3011		297	av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3012		297	1000000000 / div, track->default_duration / div, 30000);
3013			#if FF_API_R_FRAME_RATE
3014	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
3015	2/2 ✓ Branch 0 taken 274 times. ✓ Branch 1 taken 21 times.	295	&& st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
3016		274	st->r_frame_rate = st->avg_frame_rate;
3017			#endif
3018			}
3019
3020			/* export stereo mode flag as metadata tag */
3021	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)
3022		12	av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
3023
3024			/* export alpha mode flag as metadata tag */
3025	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 336 times.	339	if (track->video.alpha_mode)
3026		3	av_dict_set_int(&st->metadata, "alpha_mode", 1, 0);
3027
3028			/* if we have virtual track, mark the real tracks */
3029		339	planes = track->operation.combine_planes.elem;
3030	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	for (int j = 0; j < track->operation.combine_planes.nb_elem; j++) {
3031		✗	MatroskaTrack *tracks = matroska->tracks.elem;
3032			char buf[32];
3033		✗	if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
3034		✗	continue;
3035		✗	snprintf(buf, sizeof(buf), "%s_%d",
3036		✗	matroska_video_stereo_plane[planes[j].type], st->index);
3037		✗	for (int k = 0; k < matroska->tracks.nb_elem; k++)
3038		✗	if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
3039		✗	av_dict_set(&tracks[k].stream->metadata,
3040			"stereo_mode", buf, 0);
3041		✗	break;
3042			}
3043			}
3044			// add stream level stereo3d side data if it is a supported format
3045	2/2 ✓ Branch 0 taken 240 times. ✓ Branch 1 taken 99 times.	339	if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
3046	2/2 ✓ Branch 0 taken 238 times. ✓ Branch 1 taken 2 times.	240	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_CYAN_RED &&
3047	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 2 times.	238	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_GREEN_MAG) {
3048		236	int ret = mkv_stereo3d_conv(st, track->video.stereo_mode);
3049	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (ret < 0)
3050		✗	return ret;
3051			}
3052
3053		339	ret = mkv_parse_video_color(st, track);
3054	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
3055		✗	return ret;
3056		339	ret = mkv_parse_video_projection(st, track, matroska->ctx);
3057	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
3058		✗	return ret;
3059
3060		339	return 0;
3061			}
3062
3063			/* Performs the codec-specific part of parsing a subtitle track. */
3064		24	static int mkv_parse_subtitle_codec(MatroskaTrack *track, AVStream *st,
3065			AVCodecParameters *par,
3066			const MatroskaDemuxContext *matroska)
3067			{
3068	2/3 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 16 times.	24	switch (par->codec_id) {
3069		✗	case AV_CODEC_ID_ARIB_CAPTION:
3070		✗	if (track->codec_priv.size == 3) {
3071		✗	int component_tag = track->codec_priv.data[0];
3072		✗	int data_component_id = AV_RB16(track->codec_priv.data + 1);
3073
3074		✗	switch (data_component_id) {
3075		✗	case 0x0008:
3076			// [0x30..0x37] are component tags utilized for
3077			// non-mobile captioning service ("profile A").
3078		✗	if (component_tag >= 0x30 && component_tag <= 0x37) {
3079		✗	par->profile = AV_PROFILE_ARIB_PROFILE_A;
3080			}
3081		✗	break;
3082		✗	case 0x0012:
3083			// component tag 0x87 signifies a mobile/partial reception
3084			// (1seg) captioning service ("profile C").
3085		✗	if (component_tag == 0x87) {
3086		✗	par->profile = AV_PROFILE_ARIB_PROFILE_C;
3087			}
3088		✗	break;
3089		✗	default:
3090		✗	break;
3091			}
3092
3093		✗	if (par->profile == AV_PROFILE_UNKNOWN)
3094		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3095			"Unknown ARIB caption profile utilized: %02x / %04x\n",
3096			component_tag, data_component_id);
3097
3098		✗	track->codec_priv.size = 0;
3099			}
3100		✗	break;
3101		8	case AV_CODEC_ID_WEBVTT:
3102	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 6 times.	8	if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
3103		2	st->disposition |= AV_DISPOSITION_CAPTIONS;
3104	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times.	6	} else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
3105		2	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3106	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	} else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
3107		2	st->disposition |= AV_DISPOSITION_METADATA;
3108			}
3109		8	break;
3110			}
3111
3112		24	return 0;
3113			}
3114
3115		372	static int matroska_parse_tracks(AVFormatContext *s)
3116			{
3117		372	MatroskaDemuxContext *matroska = s->priv_data;
3118		372	MatroskaTrack *tracks = matroska->tracks.elem;
3119			int i, j, ret;
3120
3121	2/2 ✓ Branch 0 taken 447 times. ✓ Branch 1 taken 372 times.	819	for (i = 0; i < matroska->tracks.nb_elem; i++) {
3122		447	MatroskaTrack *track = &tracks[i];
3123		447	enum AVCodecID codec_id = AV_CODEC_ID_NONE;
3124			AVCodecParameters *par;
3125			MatroskaTrackType type;
3126		447	int extradata_offset = 0;
3127			AVStream *st;
3128		447	char* key_id_base64 = NULL;
3129
3130			/* Apply some sanity checks. */
3131	2/2 ✓ Branch 0 taken 108 times. ✓ Branch 1 taken 339 times.	447	if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
3132	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 84 times.	108	track->type != MATROSKA_TRACK_TYPE_AUDIO &&
3133	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 20 times.	24	track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
3134	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	track->type != MATROSKA_TRACK_TYPE_METADATA) {
3135		✗	av_log(matroska->ctx, AV_LOG_INFO,
3136			"Unknown or unsupported track type %"PRIu64"\n",
3137			track->type);
3138		✗	continue;
3139			}
3140	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (!track->codec_id)
3141		✗	continue;
3142
3143	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'
3144	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'
3145	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'
3146	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'
3147			) {
3148		✗	av_log(matroska->ctx, AV_LOG_INFO, "Inconsistent track type\n");
3149		✗	continue;
3150			}
3151
3152	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 ||
3153	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	isnan(track->audio.samplerate)) {
3154		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3155			"Invalid sample rate %f, defaulting to 8000 instead.\n",
3156			track->audio.samplerate);
3157		✗	track->audio.samplerate = 8000;
3158			}
3159
3160	2/2 ✓ Branch 0 taken 339 times. ✓ Branch 1 taken 108 times.	447	if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
3161	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) {
3162		204	double default_duration = 1000000000 / track->video.frame_rate;
3163	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) {
3164		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3165			"Invalid frame rate %e. Cannot calculate default duration.\n",
3166			track->video.frame_rate);
3167			} else {
3168		204	track->default_duration = default_duration;
3169			}
3170			}
3171	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;
3172	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if ((matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
3173		✗	(!track->video.pixel_width || !track->video.pixel_height)) ||
3174	1/2 ✓ Branch 0 taken 339 times. ✗ Branch 1 not taken.	339	(track->video.pixel_cropl >= INT_MAX - track->video.pixel_cropr ||
3175	1/2 ✓ Branch 0 taken 339 times. ✗ Branch 1 not taken.	339	track->video.pixel_cropt >= INT_MAX - track->video.pixel_cropb ||
3176	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 ||
3177	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)) {
3178		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3179			"Invalid coded dimensions %"PRId64"x%"PRId64" [%"PRId64", %"PRId64", %"PRId64", %"PRId64"].\n",
3180			track->video.pixel_width, track->video.pixel_height,
3181			track->video.pixel_cropl, track->video.pixel_cropr,
3182			track->video.pixel_cropt, track->video.pixel_cropb);
3183		✗	return AVERROR_INVALIDDATA;
3184			}
3185		339	track->video.cropped_width = track->video.pixel_width -
3186		339	track->video.pixel_cropl - track->video.pixel_cropr;
3187		339	track->video.cropped_height = track->video.pixel_height -
3188		339	track->video.pixel_cropt - track->video.pixel_cropb;
3189	2/2 ✓ Branch 0 taken 296 times. ✓ Branch 1 taken 43 times.	339	if (track->video.display_unit == MATROSKA_VIDEO_DISPLAYUNIT_PIXELS) {
3190	2/2 ✓ Branch 0 taken 263 times. ✓ Branch 1 taken 33 times.	296	if (track->video.display_width == -1)
3191		263	track->video.display_width = track->video.cropped_width;
3192	2/2 ✓ Branch 0 taken 263 times. ✓ Branch 1 taken 33 times.	296	if (track->video.display_height == -1)
3193		263	track->video.display_height = track->video.cropped_height;
3194			}
3195	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 24 times.	108	} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
3196	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!track->audio.out_samplerate)
3197		83	track->audio.out_samplerate = track->audio.samplerate;
3198			}
3199		447	ret = matroska_parse_content_encodings(track->encodings.elem,
3200		447	track->encodings.nb_elem,
3201		447	track, &key_id_base64, matroska->ctx);
3202	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (ret < 0)
3203		✗	return ret;
3204
3205	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++) {
3206	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)) {
3207		440	codec_id = ff_mkv_codec_tags[j].id;
3208		440	break;
3209			}
3210			}
3211
3212		447	st = track->stream = avformat_new_stream(s, NULL);
3213	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (!st) {
3214		✗	av_free(key_id_base64);
3215		✗	return AVERROR(ENOMEM);
3216			}
3217		447	par = st->codecpar;
3218
3219		447	par->codec_id = codec_id;
3220
3221	2/2 ✓ Branch 0 taken 359 times. ✓ Branch 1 taken 88 times.	447	if (track->flag_default)
3222		359	st->disposition |= AV_DISPOSITION_DEFAULT;
3223	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 443 times.	447	if (track->flag_forced)
3224		4	st->disposition |= AV_DISPOSITION_FORCED;
3225	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 445 times.	447	if (track->flag_comment)
3226		2	st->disposition |= AV_DISPOSITION_COMMENT;
3227	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 439 times.	447	if (track->flag_hearingimpaired)
3228		8	st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
3229	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 445 times.	447	if (track->flag_visualimpaired)
3230		2	st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
3231	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 443 times.	447	if (track->flag_original.count > 0)
3232		4	st->disposition |= track->flag_original.el.u ? AV_DISPOSITION_ORIGINAL
3233	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	: AV_DISPOSITION_DUB;
3234
3235	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (key_id_base64) {
3236			/* export encryption key id as base64 metadata tag */
3237		✗	av_dict_set(&st->metadata, "enc_key_id", key_id_base64,
3238			AV_DICT_DONT_STRDUP_VAL);
3239			}
3240
3241	2/2 ✓ Branch 0 taken 323 times. ✓ Branch 1 taken 124 times.	447	if (strcmp(track->language, "und"))
3242		323	av_dict_set(&st->metadata, "language", track->language, 0);
3243		447	av_dict_set(&st->metadata, "title", track->name, 0);
3244
3245	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (track->time_scale < 0.01) {
3246		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3247			"Track TimestampScale too small %f, assuming 1.0.\n",
3248			track->time_scale);
3249		✗	track->time_scale = 1.0;
3250			}
3251
3252	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (matroska->time_scale * track->time_scale > UINT_MAX)
3253		✗	return AVERROR_INVALIDDATA;
3254
3255		447	avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
3256			1000 * 1000 * 1000); /* 64 bit pts in ns */
3257
3258			/* convert the delay from ns to the track timebase */
3259		447	track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
3260		447	(AVRational){ 1, 1000000000 },
3261			st->time_base);
3262
3263		447	type = track->type;
3264	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 439 times.	447	if (par->codec_id == AV_CODEC_ID_WEBVTT)
3265		8	type = MATROSKA_TRACK_TYPE_SUBTITLE;
3266	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 339 times. ✓ Branch 2 taken 24 times. ✗ Branch 3 not taken.	447	switch (type) {
3267		84	case MATROSKA_TRACK_TYPE_AUDIO:
3268		84	ret = mka_parse_audio(track, st, par, matroska,
3269			s, &extradata_offset);
3270	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret < 0)
3271		✗	return ret;
3272	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret == SKIP_TRACK)
3273		✗	continue;
3274		84	break;
3275		339	case MATROSKA_TRACK_TYPE_VIDEO:
3276		339	ret = mkv_parse_video(track, st, par, matroska, &extradata_offset);
3277	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 339 times.	339	if (ret < 0)
3278		✗	return ret;
3279		339	break;
3280		24	case MATROSKA_TRACK_TYPE_SUBTITLE:
3281		24	ret = mkv_parse_subtitle_codec(track, st, par, matroska);
3282	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (ret < 0)
3283		✗	return ret;
3284		24	par->codec_type = AVMEDIA_TYPE_SUBTITLE;
3285
3286	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (track->flag_textdescriptions)
3287		✗	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3288		24	break;
3289			}
3290
3291	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (par->codec_id == AV_CODEC_ID_NONE)
3292		✗	av_log(matroska->ctx, AV_LOG_INFO,
3293			"Unknown/unsupported AVCodecID %s.\n", track->codec_id);
3294
3295	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) {
3296		138	const uint8_t *src = track->codec_priv.data + extradata_offset;
3297		138	unsigned extra_size = track->codec_priv.size - extradata_offset;
3298		138	ret = ff_alloc_extradata(par, extra_size);
3299	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 138 times.	138	if (ret < 0)
3300		✗	return ret;
3301		138	memcpy(par->extradata, src, extra_size);
3302			}
3303
3304		447	ret = mkv_parse_block_addition_mappings(s, st, track);
3305	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 447 times.	447	if (ret < 0)
3306		✗	return ret;
3307			}
3308
3309		372	return 0;
3310			}
3311
3312		372	static int matroska_read_header(AVFormatContext *s)
3313			{
3314		372	FFFormatContext *const si = ffformatcontext(s);
3315		372	MatroskaDemuxContext *matroska = s->priv_data;
3316		372	EbmlList *attachments_list = &matroska->attachments;
3317		372	EbmlList *chapters_list = &matroska->chapters;
3318			MatroskaAttachment *attachments;
3319			MatroskaChapter *chapters;
3320		372	uint64_t max_start = 0;
3321			int64_t pos;
3322		372	Ebml ebml = { 0 };
3323			int i, j, res;
3324
3325		372	matroska->ctx = s;
3326		372	matroska->cues_parsing_deferred = 1;
3327
3328			/* First read the EBML header. */
3329	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) {
3330		✗	av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
3331		✗	ebml_free(ebml_syntax, &ebml);
3332		✗	return AVERROR_INVALIDDATA;
3333			}
3334	1/2 ✓ Branch 0 taken 372 times. ✗ Branch 1 not taken.	372	if (ebml.version > EBML_VERSION ||
3335	1/2 ✓ Branch 0 taken 372 times. ✗ Branch 1 not taken.	372	ebml.max_size > sizeof(uint64_t) ||
3336	1/2 ✓ Branch 0 taken 372 times. ✗ Branch 1 not taken.	372	ebml.id_length > sizeof(uint32_t) ||
3337	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	ebml.doctype_version > 3) {
3338		✗	avpriv_report_missing_feature(matroska->ctx,
3339			"EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
3340			ebml.version, ebml.doctype, ebml.doctype_version);
3341		✗	ebml_free(ebml_syntax, &ebml);
3342		✗	return AVERROR_PATCHWELCOME;
3343	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	} else if (ebml.doctype_version == 3) {
3344		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3345			"EBML header using unsupported features\n"
3346			"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
3347			ebml.version, ebml.doctype, ebml.doctype_version);
3348			}
3349	1/2 ✓ Branch 0 taken 640 times. ✗ Branch 1 not taken.	640	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
3350	2/2 ✓ Branch 0 taken 372 times. ✓ Branch 1 taken 268 times.	640	if (!strcmp(ebml.doctype, matroska_doctypes[i]))
3351		372	break;
3352	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
3353		✗	av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
3354		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
3355		✗	ebml_free(ebml_syntax, &ebml);
3356		✗	return AVERROR_INVALIDDATA;
3357			}
3358			}
3359		372	matroska->is_webm = !strcmp(ebml.doctype, "webm");
3360
3361		372	ebml_free(ebml_syntax, &ebml);
3362
3363		372	matroska->pkt = si->parse_pkt;
3364
3365			/* The next thing is a segment. */
3366		372	pos = avio_tell(matroska->ctx->pb);
3367		372	res = ebml_parse(matroska, matroska_segments, matroska);
3368			// Try resyncing until we find an EBML_STOP type element.
3369	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	while (res != 1) {
3370		✗	res = matroska_resync(matroska, pos);
3371		✗	if (res < 0)
3372		✗	return res;
3373		✗	pos = avio_tell(matroska->ctx->pb);
3374		✗	res = ebml_parse(matroska, matroska_segment, matroska);
3375		✗	if (res == AVERROR(EIO)) // EOF is translated to EIO, this exists the loop on EOF
3376		✗	return res;
3377			}
3378			/* Set data_offset as it might be needed later by seek_frame_generic. */
3379	2/2 ✓ Branch 0 taken 368 times. ✓ Branch 1 taken 4 times.	372	if (matroska->current_id == MATROSKA_ID_CLUSTER)
3380		368	si->data_offset = avio_tell(matroska->ctx->pb) - 4;
3381		372	matroska_execute_seekhead(matroska);
3382
3383	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (!matroska->time_scale)
3384		✗	matroska->time_scale = 1000000;
3385	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (isnan(matroska->duration))
3386		✗	matroska->duration = 0;
3387	2/2 ✓ Branch 0 taken 361 times. ✓ Branch 1 taken 11 times.	372	if (matroska->duration)
3388		361	matroska->ctx->duration = matroska->duration * matroska->time_scale *
3389		361	1000 / AV_TIME_BASE;
3390		372	av_dict_set(&s->metadata, "title", matroska->title, 0);
3391		372	av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
3392
3393	2/2 ✓ Branch 0 taken 18 times. ✓ Branch 1 taken 354 times.	372	if (matroska->date_utc.size == 8)
3394		18	matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
3395
3396		372	res = matroska_parse_tracks(s);
3397	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 372 times.	372	if (res < 0)
3398		✗	return res;
3399
3400		372	attachments = attachments_list->elem;
3401	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 372 times.	376	for (j = 0; j < attachments_list->nb_elem; j++) {
3402	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 &&
3403	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)) {
3404		✗	av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
3405			} else {
3406		4	AVStream *st = avformat_new_stream(s, NULL);
3407	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (!st)
3408		✗	break;
3409		4	av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
3410		4	av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
3411	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (attachments[j].description)
3412		✗	av_dict_set(&st->metadata, "title", attachments[j].description, 0);
3413		4	st->codecpar->codec_id = AV_CODEC_ID_NONE;
3414
3415	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++) {
3416	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)) {
3417		✗	st->codecpar->codec_id = mkv_image_mime_tags[i].id;
3418		✗	break;
3419			}
3420			}
3421
3422		4	attachments[j].stream = st;
3423
3424	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
3425		✗	res = ff_add_attached_pic(s, st, NULL, &attachments[j].bin.buf, 0);
3426		✗	if (res < 0)
3427		✗	return res;
3428			} else {
3429		4	st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
3430	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
3431		✗	break;
3432		4	memcpy(st->codecpar->extradata, attachments[j].bin.data,
3433		4	attachments[j].bin.size);
3434
3435	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++) {
3436	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if (av_strstart(attachments[j].mime, mkv_mime_tags[i].str, NULL)) {
3437		✗	st->codecpar->codec_id = mkv_mime_tags[i].id;
3438		✗	break;
3439			}
3440			}
3441			}
3442			}
3443			}
3444
3445		372	chapters = chapters_list->elem;
3446	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 372 times.	386	for (i = 0; i < chapters_list->nb_elem; i++)
3447	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 &&
3448	1/2 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken.	4	(max_start == 0 || chapters[i].start > max_start)) {
3449		28	chapters[i].chapter =
3450		14	avpriv_new_chapter(s, chapters[i].uid,
3451		14	(AVRational) { 1, 1000000000 },
3452		14	chapters[i].start, chapters[i].end,
3453		14	chapters[i].title);
3454		14	max_start = chapters[i].start;
3455			}
3456
3457		372	matroska_add_index_entries(matroska);
3458
3459		372	matroska_convert_tags(s);
3460
3461		372	return 0;
3462			}
3463
3464			/*
3465			* Put one packet in an application-supplied AVPacket struct.
3466			* Returns 0 on success or -1 on failure.
3467			*/
3468		60209	static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
3469			AVPacket *pkt)
3470			{
3471	2/2 ✓ Branch 0 taken 29482 times. ✓ Branch 1 taken 30727 times.	60209	if (matroska->queue.head) {
3472		29482	MatroskaTrack *tracks = matroska->tracks.elem;
3473			MatroskaTrack *track;
3474
3475		29482	avpriv_packet_list_get(&matroska->queue, pkt);
3476		29482	track = &tracks[pkt->stream_index];
3477	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29482 times.	29482	if (track->has_palette) {
3478		✗	uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3479		✗	if (!pal) {
3480		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
3481			} else {
3482		✗	memcpy(pal, track->palette, AVPALETTE_SIZE);
3483			}
3484		✗	track->has_palette = 0;
3485			}
3486		29482	return 0;
3487			}
3488
3489		30727	return -1;
3490			}
3491
3492			/*
3493			* Free all packets in our internal queue.
3494			*/
3495		1210	static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3496			{
3497		1210	avpriv_packet_list_free(&matroska->queue);
3498		1210	}
3499
3500		29852	static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3501			int size, int type, AVIOContext *pb,
3502			uint32_t lace_size[256], int *laces)
3503			{
3504			int n;
3505		29852	uint8_t *data = *buf;
3506
3507	2/2 ✓ Branch 0 taken 29777 times. ✓ Branch 1 taken 75 times.	29852	if (!type) {
3508		29777	*laces = 1;
3509		29777	lace_size[0] = size;
3510		29777	return 0;
3511			}
3512
3513	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 75 times.	75	if (size <= 0)
3514		✗	return AVERROR_INVALIDDATA;
3515
3516		75	*laces = *data + 1;
3517		75	data += 1;
3518		75	size -= 1;
3519
3520	3/4 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 17 times. ✓ Branch 2 taken 54 times. ✗ Branch 3 not taken.	75	switch (type) {
3521		4	case 0x1: /* Xiph lacing */
3522			{
3523			uint8_t temp;
3524		4	uint32_t total = 0;
3525	2/2 ✓ Branch 0 taken 23 times. ✓ Branch 1 taken 4 times.	27	for (n = 0; n < *laces - 1; n++) {
3526		23	lace_size[n] = 0;
3527
3528			do {
3529	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 25 times.	25	if (size <= total)
3530		✗	return AVERROR_INVALIDDATA;
3531		25	temp = *data;
3532		25	total += temp;
3533		25	lace_size[n] += temp;
3534		25	data += 1;
3535		25	size -= 1;
3536	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 23 times.	25	} while (temp == 0xff);
3537			}
3538	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (size < total)
3539		✗	return AVERROR_INVALIDDATA;
3540
3541		4	lace_size[n] = size - total;
3542		4	break;
3543			}
3544
3545		17	case 0x2: /* fixed-size lacing */
3546	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 17 times.	17	if (size % (*laces))
3547		✗	return AVERROR_INVALIDDATA;
3548	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 17 times.	98	for (n = 0; n < *laces; n++)
3549		81	lace_size[n] = size / *laces;
3550		17	break;
3551
3552		54	case 0x3: /* EBML lacing */
3553			{
3554			uint64_t num;
3555			uint64_t total;
3556			int offset;
3557
3558		54	avio_skip(pb, 4);
3559
3560		54	n = ebml_read_num(matroska, pb, 8, &num, 1);
3561	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (n < 0)
3562		✗	return n;
3563	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (num > INT_MAX)
3564		✗	return AVERROR_INVALIDDATA;
3565
3566		54	total = lace_size[0] = num;
3567		54	offset = n;
3568	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 54 times.	290	for (n = 1; n < *laces - 1; n++) {
3569			int64_t snum;
3570			int r;
3571		236	r = matroska_ebmlnum_sint(matroska, pb, &snum);
3572	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (r < 0)
3573		✗	return r;
3574	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (lace_size[n - 1] + snum > (uint64_t)INT_MAX)
3575		✗	return AVERROR_INVALIDDATA;
3576
3577		236	lace_size[n] = lace_size[n - 1] + snum;
3578		236	total += lace_size[n];
3579		236	offset += r;
3580			}
3581		54	data += offset;
3582		54	size -= offset;
3583	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (size < total)
3584		✗	return AVERROR_INVALIDDATA;
3585
3586		54	lace_size[*laces - 1] = size - total;
3587		54	break;
3588			}
3589			}
3590
3591		75	*buf = data;
3592
3593		75	return 0;
3594			}
3595
3596		✗	static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3597			MatroskaTrack *track, AVStream *st,
3598			uint8_t *data, int size, uint64_t timecode,
3599			int64_t pos)
3600			{
3601		✗	const int a = st->codecpar->block_align;
3602		✗	const int sps = track->audio.sub_packet_size;
3603		✗	const int cfs = track->audio.coded_framesize;
3604		✗	const int h = track->audio.sub_packet_h;
3605		✗	const int w = track->audio.frame_size;
3606		✗	int y = track->audio.sub_packet_cnt;
3607			int x;
3608
3609		✗	if (!track->audio.pkt_cnt) {
3610		✗	if (track->audio.sub_packet_cnt == 0)
3611		✗	track->audio.buf_timecode = timecode;
3612		✗	if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3613		✗	if (size < cfs * h / 2) {
3614		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3615			"Corrupt int4 RM-style audio packet size\n");
3616		✗	return AVERROR_INVALIDDATA;
3617			}
3618		✗	for (x = 0; x < h / 2; x++)
3619		✗	memcpy(track->audio.buf + x * 2 * w + y * cfs,
3620		✗	data + x * cfs, cfs);
3621		✗	} else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3622		✗	if (size < w) {
3623		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3624			"Corrupt sipr RM-style audio packet size\n");
3625		✗	return AVERROR_INVALIDDATA;
3626			}
3627		✗	memcpy(track->audio.buf + y * w, data, w);
3628			} else {
3629		✗	if (size < w) {
3630		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3631			"Corrupt generic RM-style audio packet size\n");
3632		✗	return AVERROR_INVALIDDATA;
3633			}
3634		✗	for (x = 0; x < w / sps; x++)
3635		✗	memcpy(track->audio.buf +
3636		✗	sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3637		✗	data + x * sps, sps);
3638			}
3639
3640		✗	if (++track->audio.sub_packet_cnt >= h) {
3641		✗	if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3642		✗	ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3643		✗	track->audio.sub_packet_cnt = 0;
3644		✗	track->audio.pkt_cnt = h * w / a;
3645			}
3646			}
3647
3648		✗	while (track->audio.pkt_cnt) {
3649			int ret;
3650		✗	AVPacket *pkt = matroska->pkt;
3651
3652		✗	ret = av_new_packet(pkt, a);
3653		✗	if (ret < 0) {
3654		✗	return ret;
3655			}
3656		✗	memcpy(pkt->data,
3657		✗	track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3658			a);
3659		✗	pkt->pts = track->audio.buf_timecode;
3660		✗	track->audio.buf_timecode = AV_NOPTS_VALUE;
3661		✗	pkt->pos = pos;
3662		✗	pkt->stream_index = st->index;
3663		✗	ret = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3664		✗	if (ret < 0) {
3665		✗	av_packet_unref(pkt);
3666		✗	return AVERROR(ENOMEM);
3667			}
3668			}
3669
3670		✗	return 0;
3671			}
3672
3673			/* reconstruct full wavpack blocks from mangled matroska ones */
3674		24	static int matroska_parse_wavpack(MatroskaTrack *track,
3675			uint8_t **data, int *size)
3676			{
3677		24	uint8_t *dst = NULL;
3678		24	uint8_t *src = *data;
3679		24	int dstlen = 0;
3680		24	int srclen = *size;
3681			uint32_t samples;
3682			uint16_t ver;
3683		24	int ret, offset = 0;
3684
3685	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (srclen < 12)
3686		✗	return AVERROR_INVALIDDATA;
3687
3688			av_assert1(track->stream->codecpar->extradata_size >= 2);
3689		24	ver = AV_RL16(track->stream->codecpar->extradata);
3690
3691		24	samples = AV_RL32(src);
3692		24	src += 4;
3693		24	srclen -= 4;
3694
3695	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 24 times.	136	while (srclen >= 8) {
3696			int multiblock;
3697			uint32_t blocksize;
3698			uint8_t *tmp;
3699
3700		112	uint32_t flags = AV_RL32(src);
3701		112	uint32_t crc = AV_RL32(src + 4);
3702		112	src += 8;
3703		112	srclen -= 8;
3704
3705		112	multiblock = (flags & 0x1800) != 0x1800;
3706	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 2 times.	112	if (multiblock) {
3707	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 110 times.	110	if (srclen < 4) {
3708		✗	ret = AVERROR_INVALIDDATA;
3709		✗	goto fail;
3710			}
3711		110	blocksize = AV_RL32(src);
3712		110	src += 4;
3713		110	srclen -= 4;
3714			} else
3715		2	blocksize = srclen;
3716
3717	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (blocksize > srclen) {
3718		✗	ret = AVERROR_INVALIDDATA;
3719		✗	goto fail;
3720			}
3721
3722		112	tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3723	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (!tmp) {
3724		✗	ret = AVERROR(ENOMEM);
3725		✗	goto fail;
3726			}
3727		112	dst = tmp;
3728		112	dstlen += blocksize + 32;
3729
3730		112	AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3731		112	AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3732		112	AV_WL16(dst + offset + 8, ver); // version
3733		112	AV_WL16(dst + offset + 10, 0); // track/index_no
3734		112	AV_WL32(dst + offset + 12, 0); // total samples
3735		112	AV_WL32(dst + offset + 16, 0); // block index
3736		112	AV_WL32(dst + offset + 20, samples); // number of samples
3737		112	AV_WL32(dst + offset + 24, flags); // flags
3738		112	AV_WL32(dst + offset + 28, crc); // crc
3739		112	memcpy(dst + offset + 32, src, blocksize); // block data
3740
3741		112	src += blocksize;
3742		112	srclen -= blocksize;
3743		112	offset += blocksize + 32;
3744			}
3745
3746		24	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3747
3748		24	*data = dst;
3749		24	*size = dstlen;
3750
3751		24	return 0;
3752
3753		✗	fail:
3754		✗	av_freep(&dst);
3755		✗	return ret;
3756			}
3757
3758		11	static int matroska_parse_prores(MatroskaTrack *track,
3759			uint8_t **data, int *size)
3760			{
3761			uint8_t *dst;
3762		11	int dstlen = *size + 8;
3763
3764		11	dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3765	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (!dst)
3766		✗	return AVERROR(ENOMEM);
3767
3768		11	AV_WB32(dst, dstlen);
3769		11	AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3770		11	memcpy(dst + 8, *data, dstlen - 8);
3771		11	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3772
3773		11	*data = dst;
3774		11	*size = dstlen;
3775
3776		11	return 0;
3777			}
3778
3779		90	static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3780			MatroskaTrack *track,
3781			AVStream *st,
3782			uint8_t *data, int data_len,
3783			uint64_t timecode,
3784			uint64_t duration,
3785			int64_t pos)
3786			{
3787		90	AVPacket *pkt = matroska->pkt;
3788			uint8_t *id, *settings, *text, *buf;
3789			int id_len, settings_len, text_len;
3790			uint8_t *p, *q;
3791			int err;
3792
3793	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (data_len <= 0)
3794		✗	return AVERROR_INVALIDDATA;
3795
3796		90	p = data;
3797		90	q = data + data_len;
3798
3799		90	id = p;
3800		90	id_len = -1;
3801	1/2 ✓ Branch 0 taken 192 times. ✗ Branch 1 not taken.	192	while (p < q) {
3802	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') {
3803		90	id_len = p - id;
3804	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3805		✗	p++;
3806		90	break;
3807			}
3808		102	p++;
3809			}
3810
3811	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')
3812		✗	return AVERROR_INVALIDDATA;
3813		90	p++;
3814
3815		90	settings = p;
3816		90	settings_len = -1;
3817	1/2 ✓ Branch 0 taken 546 times. ✗ Branch 1 not taken.	546	while (p < q) {
3818	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') {
3819		90	settings_len = p - settings;
3820	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3821		✗	p++;
3822		90	break;
3823			}
3824		456	p++;
3825			}
3826
3827	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')
3828		✗	return AVERROR_INVALIDDATA;
3829		90	p++;
3830
3831		90	text = p;
3832		90	text_len = q - p;
3833	1/2 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken.	90	while (text_len > 0) {
3834		90	const int len = text_len - 1;
3835		90	const uint8_t c = p[len];
3836	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')
3837		90	break;
3838		✗	text_len = len;
3839			}
3840
3841		90	err = av_new_packet(pkt, text_len);
3842	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3843		✗	return err;
3844			}
3845
3846		90	memcpy(pkt->data, text, text_len);
3847
3848	2/2 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 78 times.	90	if (id_len > 0) {
3849		12	buf = av_packet_new_side_data(pkt,
3850			AV_PKT_DATA_WEBVTT_IDENTIFIER,
3851			id_len);
3852	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!buf) {
3853		✗	av_packet_unref(pkt);
3854		✗	return AVERROR(ENOMEM);
3855			}
3856		12	memcpy(buf, id, id_len);
3857			}
3858
3859	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 66 times.	90	if (settings_len > 0) {
3860		24	buf = av_packet_new_side_data(pkt,
3861			AV_PKT_DATA_WEBVTT_SETTINGS,
3862			settings_len);
3863	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (!buf) {
3864		✗	av_packet_unref(pkt);
3865		✗	return AVERROR(ENOMEM);
3866			}
3867		24	memcpy(buf, settings, settings_len);
3868			}
3869
3870			// Do we need this for subtitles?
3871			// pkt->flags = AV_PKT_FLAG_KEY;
3872
3873		90	pkt->stream_index = st->index;
3874		90	pkt->pts = timecode;
3875
3876			// Do we need this for subtitles?
3877			// pkt->dts = timecode;
3878
3879		90	pkt->duration = duration;
3880		90	pkt->pos = pos;
3881
3882		90	err = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3883	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3884		✗	av_packet_unref(pkt);
3885		✗	return AVERROR(ENOMEM);
3886			}
3887
3888		90	return 0;
3889			}
3890
3891		139	static int matroska_parse_block_additional(MatroskaDemuxContext *matroska,
3892			MatroskaTrack *track, AVPacket *pkt,
3893			const uint8_t *data, int size, uint64_t id)
3894			{
3895		139	const EbmlList *mappings_list = &track->block_addition_mappings;
3896		139	MatroskaBlockAdditionMapping *mappings = mappings_list->elem, *mapping = NULL;
3897			uint8_t *side_data;
3898			int res;
3899
3900	4/6 ✓ Branch 0 taken 15 times. ✓ Branch 1 taken 124 times. ✓ Branch 2 taken 15 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 15 times.	139	if (!matroska->is_webm && track->max_block_additional_id && id > track->max_block_additional_id) {
3901		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
3902		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
3903			"BlockAddID %"PRIu64" is higher than the reported MaxBlockAdditionID %"PRIu64" "
3904			"for Track with TrackNumber %"PRIu64"\n", id, track->max_block_additional_id,
3905			track->num);
3906		✗	if (strict)
3907		✗	return AVERROR_INVALIDDATA;
3908			}
3909
3910	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 137 times.	139	for (int i = 0; i < mappings_list->nb_elem; i++) {
3911	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (id != mappings[i].value)
3912		✗	continue;
3913		2	mapping = &mappings[i];
3914		2	break;
3915			}
3916
3917	5/6 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 133 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 4 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	139	if (id != 1 && !matroska->is_webm && !mapping) {
3918		✗	av_log(matroska->ctx, AV_LOG_WARNING, "BlockAddID %"PRIu64" has no mapping. Skipping\n", id);
3919		✗	return 0;
3920			}
3921
3922	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 137 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	139	if (mapping && mapping->type)
3923		2	id = mapping->type;
3924
3925	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 133 times.	139	switch (id) {
3926		6	case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35: {
3927			GetByteContext bc;
3928			int country_code, provider_code;
3929			int provider_oriented_code, application_identifier;
3930			size_t hdrplus_size;
3931			AVDynamicHDRPlus *hdrplus;
3932
3933	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (size < 6)
3934		✗	break; //ignore
3935
3936		6	bytestream2_init(&bc, data, size);
3937
3938			/* ITU-T T.35 metadata */
3939		6	country_code = bytestream2_get_byteu(&bc);
3940		6	provider_code = bytestream2_get_be16u(&bc);
3941
3942	2/4 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times. ✗ Branch 3 not taken.	6	if (country_code != ITU_T_T35_COUNTRY_CODE_US ||
3943			provider_code != ITU_T_T35_PROVIDER_CODE_SAMSUNG)
3944			break; // ignore
3945
3946		6	provider_oriented_code = bytestream2_get_be16u(&bc);
3947		6	application_identifier = bytestream2_get_byteu(&bc);
3948
3949	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)
3950			break; // ignore
3951
3952		6	hdrplus = av_dynamic_hdr_plus_alloc(&hdrplus_size);
3953	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!hdrplus)
3954		6	return AVERROR(ENOMEM);
3955
3956	1/2 ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken.	6	if ((res = av_dynamic_hdr_plus_from_t35(hdrplus, bc.buffer,
3957	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times.	12	bytestream2_get_bytes_left(&bc))) < 0 ||
3958		6	(res = av_packet_add_side_data(pkt, AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
3959			(uint8_t *)hdrplus, hdrplus_size)) < 0) {
3960		✗	av_free(hdrplus);
3961		✗	return res;
3962			}
3963
3964		6	return 0;
3965			}
3966		133	default:
3967		133	break;
3968			}
3969
3970		133	side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3971			size + (size_t)8);
3972	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 133 times.	133	if (!side_data)
3973		✗	return AVERROR(ENOMEM);
3974
3975		133	AV_WB64(side_data, id);
3976		133	memcpy(side_data + 8, data, size);
3977
3978		133	return 0;
3979			}
3980
3981		30139	static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3982			MatroskaTrack *track, AVStream *st,
3983			AVBufferRef *buf, uint8_t *data, int pkt_size,
3984			uint64_t timecode, uint64_t lace_duration,
3985			int64_t pos, int is_keyframe,
3986			MatroskaBlockMore *blockmore, int nb_blockmore,
3987			int64_t discard_padding)
3988			{
3989		30139	uint8_t *pkt_data = data;
3990		30139	int res = 0;
3991		30139	AVPacket *pkt = matroska->pkt;
3992
3993	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 30115 times.	30139	if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3994		24	res = matroska_parse_wavpack(track, &pkt_data, &pkt_size);
3995	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (res < 0) {
3996		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3997			"Error parsing a wavpack block.\n");
3998		✗	goto fail;
3999			}
4000	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (!buf)
4001		2	av_freep(&data);
4002		24	buf = NULL;
4003			}
4004
4005	2/2 ✓ Branch 0 taken 13 times. ✓ Branch 1 taken 30126 times.	30139	if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
4006	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 2 times.	13	AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
4007		11	res = matroska_parse_prores(track, &pkt_data, &pkt_size);
4008	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (res < 0) {
4009		✗	av_log(matroska->ctx, AV_LOG_ERROR,
4010			"Error parsing a prores block.\n");
4011		✗	goto fail;
4012			}
4013	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 9 times.	11	if (!buf)
4014		2	av_freep(&data);
4015		11	buf = NULL;
4016			}
4017
4018	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 30139 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	30139	if (!pkt_size && !nb_blockmore)
4019		✗	goto no_output;
4020
4021	5/6 ✓ Branch 0 taken 26919 times. ✓ Branch 1 taken 3220 times. ✓ Branch 2 taken 15 times. ✓ Branch 3 taken 26904 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 15 times.	30139	if (!matroska->is_webm && nb_blockmore && !track->max_block_additional_id) {
4022		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
4023		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
4024			"Unexpected BlockAdditions found in a Block from Track with TrackNumber %"PRIu64" "
4025			"where MaxBlockAdditionID is 0\n", track->num);
4026		✗	if (strict) {
4027		✗	res = AVERROR_INVALIDDATA;
4028		✗	goto fail;
4029			}
4030			}
4031
4032	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 30027 times.	30139	if (!buf)
4033		112	pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
4034			NULL, NULL, 0);
4035			else
4036		30027	pkt->buf = av_buffer_ref(buf);
4037
4038	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30139 times.	30139	if (!pkt->buf) {
4039		✗	res = AVERROR(ENOMEM);
4040		✗	goto fail;
4041			}
4042
4043		30139	pkt->data = pkt_data;
4044		30139	pkt->size = pkt_size;
4045		30139	pkt->flags = is_keyframe;
4046		30139	pkt->stream_index = st->index;
4047
4048	2/2 ✓ Branch 0 taken 139 times. ✓ Branch 1 taken 30139 times.	30278	for (int i = 0; i < nb_blockmore; i++) {
4049		139	MatroskaBlockMore *more = &blockmore[i];
4050
4051	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 139 times.	139	if (!more->additional.size)
4052		✗	continue;
4053
4054		139	res = matroska_parse_block_additional(matroska, track, pkt, more->additional.data,
4055			more->additional.size, more->additional_id);
4056	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 139 times.	139	if (res < 0) {
4057		✗	av_packet_unref(pkt);
4058		✗	return res;
4059			}
4060			}
4061
4062	2/2 ✓ Branch 0 taken 27 times. ✓ Branch 1 taken 30112 times.	30139	if (discard_padding) {
4063		27	uint8_t *side_data = av_packet_new_side_data(pkt,
4064			AV_PKT_DATA_SKIP_SAMPLES,
4065			10);
4066	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 27 times.	27	if (!side_data) {
4067		✗	av_packet_unref(pkt);
4068		✗	return AVERROR(ENOMEM);
4069			}
4070		27	discard_padding = av_rescale_q(discard_padding,
4071		27	(AVRational){1, 1000000000},
4072		27	(AVRational){1, st->codecpar->sample_rate});
4073	1/2 ✓ Branch 0 taken 27 times. ✗ Branch 1 not taken.	27	if (discard_padding > 0) {
4074		27	AV_WL32A(side_data + 4, discard_padding);
4075			} else {
4076		✗	AV_WL32A(side_data, -discard_padding);
4077			}
4078			}
4079
4080	2/2 ✓ Branch 0 taken 429 times. ✓ Branch 1 taken 29710 times.	30139	if (track->ms_compat)
4081		429	pkt->dts = timecode;
4082			else
4083		29710	pkt->pts = timecode;
4084		30139	pkt->pos = pos;
4085		30139	pkt->duration = lace_duration;
4086
4087		30139	res = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
4088	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30139 times.	30139	if (res < 0) {
4089		✗	av_packet_unref(pkt);
4090		✗	return AVERROR(ENOMEM);
4091			}
4092
4093		30139	return 0;
4094
4095		✗	no_output:
4096		✗	fail:
4097		✗	if (!buf)
4098		✗	av_free(pkt_data);
4099		✗	return res;
4100			}
4101
4102		30712	static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
4103			int size, int64_t pos, uint64_t cluster_time,
4104			uint64_t block_duration, int is_keyframe,
4105			MatroskaBlockMore *blockmore, int nb_blockmore,
4106			int64_t cluster_pos, int64_t discard_padding)
4107			{
4108		30712	uint64_t timecode = AV_NOPTS_VALUE;
4109			MatroskaTrack *track;
4110			FFIOContext pb;
4111		30712	int res = 0;
4112			AVStream *st;
4113			int16_t block_time;
4114			uint32_t lace_size[256];
4115		30712	int n, flags, laces = 0;
4116			uint64_t num;
4117			int trust_default_duration;
4118
4119			av_assert1(buf);
4120
4121		30712	ffio_init_read_context(&pb, data, size);
4122
4123	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 30712 times.	30712	if ((n = ebml_read_num(matroska, &pb.pub, 8, &num, 1)) < 0)
4124		✗	return n;
4125		30712	data += n;
4126		30712	size -= n;
4127
4128		30712	track = matroska_find_track_by_num(matroska, num);
4129	3/4 ✓ Branch 0 taken 30711 times. ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 30711 times.	30712	if (!track || size < 3)
4130		1	return AVERROR_INVALIDDATA;
4131
4132	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30711 times.	30711	if (!(st = track->stream)) {
4133		✗	av_log(matroska->ctx, AV_LOG_VERBOSE,
4134			"No stream associated to TrackNumber %"PRIu64". "
4135			"Ignoring Block with this TrackNumber.\n", num);
4136		✗	return 0;
4137			}
4138
4139	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 30400 times.	30711	if (st->discard >= AVDISCARD_ALL)
4140		311	return res;
4141	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30400 times.	30400	if (block_duration > INT64_MAX)
4142		✗	block_duration = INT64_MAX;
4143
4144		30400	block_time = sign_extend(AV_RB16(data), 16);
4145		30400	data += 2;
4146		30400	flags = *data++;
4147		30400	size -= 3;
4148	2/2 ✓ Branch 0 taken 29954 times. ✓ Branch 1 taken 446 times.	30400	if (is_keyframe == -1)
4149		29954	is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
4150
4151	3/4 ✓ Branch 0 taken 30400 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 79 times. ✓ Branch 3 taken 30321 times.	30400	if (cluster_time != (uint64_t) -1 &&
4152	2/2 ✓ Branch 0 taken 63 times. ✓ Branch 1 taken 16 times.	79	(block_time >= 0 || cluster_time >= -block_time)) {
4153		30384	uint64_t timecode_cluster_in_track_tb = (double) cluster_time / track->time_scale;
4154		30384	timecode = timecode_cluster_in_track_tb + block_time - track->codec_delay_in_track_tb;
4155	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 30256 times.	30384	if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
4156	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 122 times.	128	timecode < track->end_timecode)
4157		6	is_keyframe = 0; /* overlapping subtitles are not key frame */
4158	2/2 ✓ Branch 0 taken 26797 times. ✓ Branch 1 taken 3587 times.	30384	if (is_keyframe) {
4159		26797	ff_reduce_index(matroska->ctx, st->index);
4160		26797	av_add_index_entry(st, cluster_pos, timecode, 0, 0,
4161			AVINDEX_KEYFRAME);
4162			}
4163			}
4164
4165	2/2 ✓ Branch 0 taken 593 times. ✓ Branch 1 taken 29807 times.	30400	if (matroska->skip_to_keyframe &&
4166	1/2 ✓ Branch 0 taken 593 times. ✗ Branch 1 not taken.	593	track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
4167			// Compare signed timecodes. Timecode may be negative due to codec delay
4168			// offset. We don't support timestamps greater than int64_t anyway - see
4169			// AVPacket's pts.
4170	2/2 ✓ Branch 0 taken 548 times. ✓ Branch 1 taken 45 times.	593	if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
4171		548	return res;
4172	1/2 ✓ Branch 0 taken 45 times. ✗ Branch 1 not taken.	45	if (is_keyframe)
4173		45	matroska->skip_to_keyframe = 0;
4174		✗	else if (!ffstream(st)->skip_to_keyframe) {
4175		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
4176		✗	matroska->skip_to_keyframe = 0;
4177			}
4178			}
4179
4180		29852	res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
4181			&pb.pub, lace_size, &laces);
4182	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29852 times.	29852	if (res < 0) {
4183		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing frame sizes.\n");
4184		✗	return res;
4185			}
4186
4187		29852	trust_default_duration = track->default_duration != 0;
4188	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 29852 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	29852	if (track->audio.samplerate == 8000 && trust_default_duration) {
4189			// If this is needed for more codecs, then add them here
4190		✗	if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
4191		✗	if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
4192		✗	trust_default_duration = 0;
4193			}
4194			}
4195
4196	4/4 ✓ Branch 0 taken 29572 times. ✓ Branch 1 taken 280 times. ✓ Branch 2 taken 4261 times. ✓ Branch 3 taken 25311 times.	29852	if (!block_duration && trust_default_duration)
4197		4261	block_duration = track->default_duration * laces / matroska->time_scale;
4198
4199	5/6 ✓ Branch 0 taken 29852 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 76 times. ✓ Branch 3 taken 29776 times. ✓ Branch 4 taken 60 times. ✓ Branch 5 taken 16 times.	29852	if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
4200		29836	track->end_timecode =
4201		29836	FFMAX(track->end_timecode, timecode + block_duration);
4202
4203	2/2 ✓ Branch 0 taken 30229 times. ✓ Branch 1 taken 29852 times.	60081	for (n = 0; n < laces; n++) {
4204		30229	int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
4205		30229	uint8_t *out_data = data;
4206		30229	int out_size = lace_size[n];
4207
4208	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 30148 times.	30229	if (track->needs_decoding) {
4209		81	res = matroska_decode_buffer(&out_data, &out_size, track);
4210	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 81 times.	81	if (res < 0)
4211		✗	return res;
4212			/* Given that we are here means that out_data is no longer
4213			* owned by buf, so set it to NULL. This depends upon
4214			* zero-length header removal compression being ignored. */
4215			av_assert1(out_data != data);
4216		81	buf = NULL;
4217			}
4218
4219	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30229 times.	30229	if (track->audio.buf) {
4220		✗	res = matroska_parse_rm_audio(matroska, track, st,
4221			out_data, out_size,
4222			timecode, pos);
4223		✗	if (!buf)
4224		✗	av_free(out_data);
4225		✗	if (res)
4226		✗	return res;
4227	2/2 ✓ Branch 0 taken 90 times. ✓ Branch 1 taken 30139 times.	30229	} else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
4228		90	res = matroska_parse_webvtt(matroska, track, st,
4229			out_data, out_size,
4230			timecode, lace_duration,
4231			pos);
4232	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (!buf)
4233		✗	av_free(out_data);
4234	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (res)
4235		✗	return res;
4236			} else {
4237		30139	res = matroska_parse_frame(matroska, track, st, buf, out_data,
4238			out_size, timecode, lace_duration,
4239			pos, is_keyframe,
4240			blockmore, nb_blockmore,
4241			discard_padding);
4242	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30139 times.	30139	if (res)
4243		✗	return res;
4244			}
4245
4246	2/2 ✓ Branch 0 taken 30141 times. ✓ Branch 1 taken 88 times.	30229	if (timecode != AV_NOPTS_VALUE)
4247	2/2 ✓ Branch 0 taken 4830 times. ✓ Branch 1 taken 25311 times.	30141	timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
4248		30229	data += lace_size[n];
4249			}
4250
4251		29852	return 0;
4252			}
4253
4254		31114	static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
4255			{
4256		31114	MatroskaCluster *cluster = &matroska->current_cluster;
4257		31114	MatroskaBlock *block = &cluster->block;
4258			int res;
4259
4260	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31114 times.	31114	av_assert0(matroska->num_levels <= 2U);
4261
4262	2/2 ✓ Branch 0 taken 1151 times. ✓ Branch 1 taken 29963 times.	31114	if (matroska->num_levels == 1) {
4263		1151	res = ebml_parse(matroska, matroska_segment, NULL);
4264
4265	2/2 ✓ Branch 0 taken 805 times. ✓ Branch 1 taken 346 times.	1151	if (res == 1) {
4266			/* Found a cluster: subtract the size of the ID already read. */
4267		805	cluster->pos = avio_tell(matroska->ctx->pb) - 4;
4268
4269		805	res = ebml_parse(matroska, matroska_cluster_enter, cluster);
4270	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 805 times.	805	if (res < 0)
4271		✗	return res;
4272			}
4273			}
4274
4275	2/2 ✓ Branch 0 taken 30727 times. ✓ Branch 1 taken 387 times.	31114	if (matroska->num_levels == 2) {
4276			/* We are inside a cluster. */
4277		30727	res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
4278
4279	4/4 ✓ Branch 0 taken 30717 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 30712 times. ✓ Branch 3 taken 5 times.	30727	if (res >= 0 && block->bin.size > 0) {
4280	2/2 ✓ Branch 0 taken 487 times. ✓ Branch 1 taken 30225 times.	30712	int is_keyframe = block->non_simple ? block->reference.count == 0 : -1;
4281
4282		30712	res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
4283			block->bin.size, block->bin.pos,
4284			cluster->timecode, block->duration,
4285		30712	is_keyframe, block->blockmore.elem,
4286			block->blockmore.nb_elem, cluster->pos,
4287			block->discard_padding);
4288			}
4289
4290		30727	ebml_free(matroska_blockgroup, block);
4291		30727	memset(block, 0, sizeof(*block));
4292	2/2 ✓ Branch 0 taken 359 times. ✓ Branch 1 taken 28 times.	387	} else if (!matroska->num_levels) {
4293	2/2 ✓ Branch 1 taken 352 times. ✓ Branch 2 taken 7 times.	359	if (!avio_feof(matroska->ctx->pb)) {
4294		352	avio_r8(matroska->ctx->pb);
4295	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 352 times.	352	if (!avio_feof(matroska->ctx->pb)) {
4296		✗	av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
4297			"end of segment.\n");
4298		✗	return AVERROR_INVALIDDATA;
4299			}
4300			}
4301		359	matroska->done = 1;
4302		359	return AVERROR_EOF;
4303			}
4304
4305		30755	return res;
4306			}
4307
4308		29868	static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
4309			{
4310		29868	MatroskaDemuxContext *matroska = s->priv_data;
4311		29868	int ret = 0;
4312
4313	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 29858 times.	29868	if (matroska->resync_pos == -1) {
4314			// This can only happen if generic seeking has been used.
4315		10	matroska->resync_pos = avio_tell(s->pb);
4316			}
4317
4318	2/2 ✓ Branch 1 taken 30727 times. ✓ Branch 2 taken 29482 times.	60209	while (matroska_deliver_packet(matroska, pkt)) {
4319	2/2 ✓ Branch 0 taken 386 times. ✓ Branch 1 taken 30341 times.	30727	if (matroska->done)
4320	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 376 times.	386	return (ret < 0) ? ret : AVERROR_EOF;
4321	4/4 ✓ Branch 1 taken 346 times. ✓ Branch 2 taken 29995 times. ✓ Branch 3 taken 13 times. ✓ Branch 4 taken 333 times.	30341	if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
4322		13	ret = matroska_resync(matroska, matroska->resync_pos);
4323			}
4324
4325		29482	return 0;
4326			}
4327
4328		55	static int matroska_read_seek(AVFormatContext *s, int stream_index,
4329			int64_t timestamp, int flags)
4330			{
4331		55	MatroskaDemuxContext *matroska = s->priv_data;
4332		55	MatroskaTrack *tracks = NULL;
4333		55	AVStream *st = s->streams[stream_index];
4334		55	FFStream *const sti = ffstream(st);
4335			int i, index;
4336
4337			/* Parse the CUES now since we need the index data to seek. */
4338	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 52 times.	55	if (matroska->cues_parsing_deferred > 0) {
4339		3	matroska->cues_parsing_deferred = 0;
4340		3	matroska_parse_cues(matroska);
4341			}
4342
4343	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 55 times.	55	if (!sti->nb_index_entries)
4344		✗	goto err;
4345		55	timestamp = FFMAX(timestamp, sti->index_entries[0].timestamp);
4346
4347	2/2 ✓ Branch 1 taken 45 times. ✓ Branch 2 taken 10 times.	55	if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4348	2/2 ✓ Branch 0 taken 17 times. ✓ Branch 1 taken 28 times.	45	index == sti->nb_index_entries - 1) {
4349		27	matroska_reset_status(matroska, 0, sti->index_entries[sti->nb_index_entries - 1].pos);
4350	2/2 ✓ Branch 1 taken 285 times. ✓ Branch 2 taken 410 times.	695	while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4351	2/2 ✓ Branch 0 taken 409 times. ✓ Branch 1 taken 1 times.	410	index == sti->nb_index_entries - 1) {
4352		694	matroska_clear_queue(matroska);
4353	2/2 ✓ Branch 1 taken 26 times. ✓ Branch 2 taken 668 times.	694	if (matroska_parse_cluster(matroska) < 0)
4354		26	break;
4355			}
4356			}
4357
4358		55	matroska_clear_queue(matroska);
4359	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 &&
4360	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	index == sti->nb_index_entries - 1))
4361		10	goto err;
4362
4363		45	tracks = matroska->tracks.elem;
4364	2/2 ✓ Branch 0 taken 69 times. ✓ Branch 1 taken 45 times.	114	for (i = 0; i < matroska->tracks.nb_elem; i++) {
4365		69	tracks[i].audio.pkt_cnt = 0;
4366		69	tracks[i].audio.sub_packet_cnt = 0;
4367		69	tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
4368		69	tracks[i].end_timecode = 0;
4369			}
4370
4371			/* We seek to a level 1 element, so set the appropriate status. */
4372		45	matroska_reset_status(matroska, 0, sti->index_entries[index].pos);
4373	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (flags & AVSEEK_FLAG_ANY) {
4374		✗	sti->skip_to_keyframe = 0;
4375		✗	matroska->skip_to_timecode = timestamp;
4376			} else {
4377		45	sti->skip_to_keyframe = 1;
4378		45	matroska->skip_to_timecode = sti->index_entries[index].timestamp;
4379			}
4380		45	matroska->skip_to_keyframe = 1;
4381		45	matroska->done = 0;
4382		45	avpriv_update_cur_dts(s, st, sti->index_entries[index].timestamp);
4383		45	return 0;
4384		10	err:
4385			// slightly hackish but allows proper fallback to
4386			// the generic seeking code.
4387		10	matroska_reset_status(matroska, 0, -1);
4388		10	matroska->resync_pos = -1;
4389		10	matroska_clear_queue(matroska);
4390		10	sti->skip_to_keyframe =
4391		10	matroska->skip_to_keyframe = 0;
4392		10	matroska->done = 0;
4393		10	return -1;
4394			}
4395
4396		372	static int matroska_read_close(AVFormatContext *s)
4397			{
4398		372	MatroskaDemuxContext *matroska = s->priv_data;
4399		372	MatroskaTrack *tracks = matroska->tracks.elem;
4400			int n;
4401
4402		372	matroska_clear_queue(matroska);
4403
4404	2/2 ✓ Branch 0 taken 447 times. ✓ Branch 1 taken 372 times.	819	for (n = 0; n < matroska->tracks.nb_elem; n++)
4405	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 363 times.	447	if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
4406		84	av_freep(&tracks[n].audio.buf);
4407		372	ebml_free(matroska_segment, matroska);
4408
4409		372	return 0;
4410			}
4411
4412			#if CONFIG_WEBM_DASH_MANIFEST_DEMUXER
4413			typedef struct {
4414			int64_t start_time_ns;
4415			int64_t end_time_ns;
4416			int64_t start_offset;
4417			int64_t end_offset;
4418			} CueDesc;
4419
4420			/* This function searches all the Cues and returns the CueDesc corresponding to
4421			* the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
4422			* end_time_ns. All 4 fields will be set to -1 if ts >= file's duration or
4423			* if an error occurred.
4424			*/
4425		4051	static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
4426		4051	MatroskaDemuxContext *matroska = s->priv_data;
4427		4051	FFStream *const sti = ffstream(s->streams[0]);
4428		4051	AVIndexEntry *const index_entries = sti->index_entries;
4429		4051	int nb_index_entries = sti->nb_index_entries;
4430			CueDesc cue_desc;
4431			int i;
4432
4433	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 3950 times.	4051	if (ts >= (int64_t)(matroska->duration * matroska->time_scale))
4434		101	return (CueDesc) {-1, -1, -1, -1};
4435	2/2 ✓ Branch 0 taken 45235 times. ✓ Branch 1 taken 156 times.	45391	for (i = 1; i < nb_index_entries; i++) {
4436	1/2 ✓ Branch 0 taken 45235 times. ✗ Branch 1 not taken.	45235	if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
4437	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 41441 times.	45235	index_entries[i].timestamp * matroska->time_scale > ts) {
4438		3794	break;
4439			}
4440			}
4441		3950	--i;
4442	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3950 times.	3950	if (index_entries[i].timestamp > matroska->duration)
4443		✗	return (CueDesc) {-1, -1, -1, -1};
4444		3950	cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
4445		3950	cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
4446	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 156 times.	3950	if (i != nb_index_entries - 1) {
4447		3794	cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
4448		3794	cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
4449			} else {
4450		156	cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
4451			// FIXME: this needs special handling for files where Cues appear
4452			// before Clusters. the current logic assumes Cues appear after
4453			// Clusters.
4454		156	cue_desc.end_offset = cues_start - matroska->segment_start;
4455			}
4456		3950	return cue_desc;
4457			}
4458
4459		10	static int webm_clusters_start_with_keyframe(AVFormatContext *s)
4460			{
4461		10	MatroskaDemuxContext *matroska = s->priv_data;
4462		10	AVStream *const st = s->streams[0];
4463		10	FFStream *const sti = ffstream(st);
4464		10	uint32_t id = matroska->current_id;
4465			int64_t cluster_pos, before_pos;
4466		10	int index, rv = 1;
4467
4468	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (sti->nb_index_entries <= 0)
4469		✗	return 0;
4470
4471			// seek to the first cluster using cues.
4472		10	index = av_index_search_timestamp(st, 0, 0);
4473	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (index < 0)
4474		✗	return 0;
4475		10	cluster_pos = sti->index_entries[index].pos;
4476		10	before_pos = avio_tell(s->pb);
4477		78	while (1) {
4478			uint64_t cluster_id, cluster_length;
4479			int read;
4480			AVPacket *pkt;
4481		88	avio_seek(s->pb, cluster_pos, SEEK_SET);
4482			// read cluster id and length
4483		88	read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
4484	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
4485			break;
4486		79	read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
4487	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 79 times.	79	if (read < 0)
4488		✗	break;
4489
4490		79	matroska_reset_status(matroska, 0, cluster_pos);
4491		79	matroska_clear_queue(matroska);
4492	1/2 ✓ Branch 1 taken 79 times. ✗ Branch 2 not taken.	79	if (matroska_parse_cluster(matroska) < 0 ||
4493	1/2 ✓ Branch 0 taken 79 times. ✗ Branch 1 not taken.	79	!matroska->queue.head) {
4494			break;
4495			}
4496		79	pkt = &matroska->queue.head->pkt;
4497			// 4 + read is the length of the cluster id and the cluster length field.
4498		79	cluster_pos += 4 + read + cluster_length;
4499	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 78 times.	79	if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
4500		1	rv = 0;
4501		1	break;
4502			}
4503			}
4504
4505			/* Restore the status after matroska_read_header: */
4506		10	matroska_reset_status(matroska, id, before_pos);
4507
4508		10	return rv;
4509			}
4510
4511		555	static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
4512			double min_buffer, double* buffer,
4513			double* sec_to_download, AVFormatContext *s,
4514			int64_t cues_start)
4515			{
4516		555	double nano_seconds_per_second = 1000000000.0;
4517		555	double time_sec = time_ns / nano_seconds_per_second;
4518		555	int rv = 0;
4519		555	int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
4520		555	int64_t end_time_ns = time_ns + time_to_search_ns;
4521		555	double sec_downloaded = 0.0;
4522		555	CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
4523	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (desc_curr.start_time_ns == -1)
4524		✗	return -1;
4525		555	*sec_to_download = 0.0;
4526
4527			// Check for non cue start time.
4528	2/2 ✓ Branch 0 taken 513 times. ✓ Branch 1 taken 42 times.	555	if (time_ns > desc_curr.start_time_ns) {
4529		513	int64_t cue_nano = desc_curr.end_time_ns - time_ns;
4530		513	double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
4531		513	double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
4532		513	double timeToDownload = (cueBytes * 8.0) / bps;
4533
4534		513	sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
4535		513	*sec_to_download += timeToDownload;
4536
4537			// Check if the search ends within the first cue.
4538	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 513 times.	513	if (desc_curr.end_time_ns >= end_time_ns) {
4539		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4540		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4541		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4542		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4543			}
4544
4545	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 509 times.	513	if ((sec_downloaded + *buffer) <= min_buffer) {
4546		4	return 1;
4547			}
4548
4549			// Get the next Cue.
4550		509	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4551			}
4552
4553	2/2 ✓ Branch 0 taken 2856 times. ✓ Branch 1 taken 100 times.	2956	while (desc_curr.start_time_ns != -1) {
4554		2856	int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
4555		2856	int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
4556		2856	double desc_sec = desc_ns / nano_seconds_per_second;
4557		2856	double bits = (desc_bytes * 8.0);
4558		2856	double time_to_download = bits / bps;
4559
4560		2856	sec_downloaded += desc_sec - time_to_download;
4561		2856	*sec_to_download += time_to_download;
4562
4563	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2856 times.	2856	if (desc_curr.end_time_ns >= end_time_ns) {
4564		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4565		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4566		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4567		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4568
4569		✗	if ((sec_downloaded + *buffer) <= min_buffer)
4570		✗	rv = 1;
4571		✗	break;
4572			}
4573
4574	2/2 ✓ Branch 0 taken 451 times. ✓ Branch 1 taken 2405 times.	2856	if ((sec_downloaded + *buffer) <= min_buffer) {
4575		451	rv = 1;
4576		451	break;
4577			}
4578
4579		2405	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4580			}
4581		551	*buffer = *buffer + sec_downloaded;
4582		551	return rv;
4583			}
4584
4585			/* This function computes the bandwidth of the WebM file with the help of
4586			* buffer_size_after_time_downloaded() function. Both of these functions are
4587			* adapted from WebM Tools project and are adapted to work with FFmpeg's
4588			* Matroska parsing mechanism.
4589			*
4590			* Returns the bandwidth of the file on success; -1 on error.
4591			* */
4592		10	static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4593			{
4594		10	MatroskaDemuxContext *matroska = s->priv_data;
4595		10	AVStream *st = s->streams[0];
4596		10	FFStream *const sti = ffstream(st);
4597		10	double bandwidth = 0.0;
4598
4599	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int i = 0; i < sti->nb_index_entries; i++) {
4600		101	int64_t prebuffer_ns = 1000000000;
4601		101	int64_t time_ns = sti->index_entries[i].timestamp * matroska->time_scale;
4602		101	double nano_seconds_per_second = 1000000000.0;
4603			int64_t prebuffered_ns;
4604		101	double prebuffer_bytes = 0.0;
4605		101	int64_t temp_prebuffer_ns = prebuffer_ns;
4606			int64_t pre_bytes, pre_ns;
4607			double pre_sec, prebuffer, bits_per_second;
4608		101	CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4609			// Start with the first Cue.
4610		101	CueDesc desc_end = desc_beg;
4611
4612	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 101 times.	101	if (time_ns > INT64_MAX - prebuffer_ns)
4613		✗	return -1;
4614		101	prebuffered_ns = time_ns + prebuffer_ns;
4615
4616			// Figure out how much data we have downloaded for the prebuffer. This will
4617			// be used later to adjust the bits per sample to try.
4618	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) {
4619			// Prebuffered the entire Cue.
4620		21	prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4621		21	temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4622		21	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4623			}
4624	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 100 times.	101	if (desc_end.start_time_ns == -1) {
4625			// The prebuffer is larger than the duration.
4626	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4627		✗	return -1;
4628		1	bits_per_second = 0.0;
4629			} else {
4630			// The prebuffer ends in the last Cue. Estimate how much data was
4631			// prebuffered.
4632		100	pre_bytes = desc_end.end_offset - desc_end.start_offset;
4633	1/2 ✓ Branch 0 taken 100 times. ✗ Branch 1 not taken.	100	if (desc_end.end_time_ns <= desc_end.start_time_ns ||
4634	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)
4635		✗	return -1;
4636		100	pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4637		100	pre_sec = pre_ns / nano_seconds_per_second;
4638		100	prebuffer_bytes +=
4639		100	pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4640
4641		100	prebuffer = prebuffer_ns / nano_seconds_per_second;
4642
4643			// Set this to 0.0 in case our prebuffer buffers the entire video.
4644		100	bits_per_second = 0.0;
4645			do {
4646		560	int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4647		560	int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4648			double desc_sec, calc_bits_per_second, percent, mod_bits_per_second;
4649	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)
4650		✗	return -1;
4651
4652		560	desc_sec = desc_ns / nano_seconds_per_second;
4653		560	calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4654
4655			// Drop the bps by the percentage of bytes buffered.
4656		560	percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4657		560	mod_bits_per_second = calc_bits_per_second * percent;
4658
4659	2/2 ✓ Branch 0 taken 555 times. ✓ Branch 1 taken 5 times.	560	if (prebuffer < desc_sec) {
4660		555	double search_sec =
4661		555	(double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4662
4663			// Add 1 so the bits per second should be a little bit greater than file
4664			// datarate.
4665		555	int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4666		555	const double min_buffer = 0.0;
4667		555	double buffer = prebuffer;
4668		555	double sec_to_download = 0.0;
4669
4670		555	int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4671			min_buffer, &buffer, &sec_to_download,
4672			s, cues_start);
4673	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (rv < 0) {
4674		✗	return -1;
4675	2/2 ✓ Branch 0 taken 100 times. ✓ Branch 1 taken 455 times.	555	} else if (rv == 0) {
4676		100	bits_per_second = (double)(bps);
4677		100	break;
4678			}
4679			}
4680
4681		460	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4682	1/2 ✓ Branch 0 taken 460 times. ✗ Branch 1 not taken.	460	} while (desc_end.start_time_ns != -1);
4683			}
4684	2/2 ✓ Branch 0 taken 38 times. ✓ Branch 1 taken 63 times.	101	if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4685			}
4686		10	return (int64_t)bandwidth;
4687			}
4688
4689		10	static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4690			{
4691		10	MatroskaDemuxContext *matroska = s->priv_data;
4692		10	EbmlList *seekhead_list = &matroska->seekhead;
4693		10	MatroskaSeekhead *seekhead = seekhead_list->elem;
4694		10	AVStream *const st = s->streams[0];
4695		10	FFStream *const sti = ffstream(st);
4696			AVBPrint bprint;
4697			char *buf;
4698		10	int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4699			int i;
4700			int ret;
4701
4702			// determine cues start and end positions
4703	1/2 ✓ Branch 0 taken 34 times. ✗ Branch 1 not taken.	34	for (i = 0; i < seekhead_list->nb_elem; i++)
4704	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 24 times.	34	if (seekhead[i].id == MATROSKA_ID_CUES)
4705		10	break;
4706
4707	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (i >= seekhead_list->nb_elem) return -1;
4708
4709		10	before_pos = avio_tell(matroska->ctx->pb);
4710		10	cues_start = seekhead[i].pos + matroska->segment_start;
4711	1/2 ✓ Branch 1 taken 10 times. ✗ Branch 2 not taken.	10	if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4712			// cues_end is computed as cues_start + cues_length + length of the
4713			// Cues element ID (i.e. 4) + EBML length of the Cues element.
4714			// cues_end is inclusive and the above sum is reduced by 1.
4715			uint64_t cues_length, cues_id;
4716			int bytes_read;
4717		10	bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4718	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))
4719		✗	return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4720		10	bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4721	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (bytes_read < 0)
4722		✗	return bytes_read;
4723		10	cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4724			}
4725		10	avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4726	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;
4727
4728			// parse the cues
4729		10	matroska_parse_cues(matroska);
4730
4731	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (!sti->nb_index_entries)
4732		✗	return AVERROR_INVALIDDATA;
4733
4734			// cues start
4735		10	av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4736
4737			// cues end
4738		10	av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4739
4740			// if the file has cues at the start, fix up the init range so that
4741			// it does not include it
4742	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (cues_start <= init_range)
4743		✗	av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4744
4745			// bandwidth
4746		10	bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4747	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (bandwidth < 0) return -1;
4748		10	av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4749
4750			// check if all clusters start with key frames
4751		10	av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
4752
4753			// Store cue point timestamps as a comma separated list
4754			// for checking subsegment alignment in the muxer.
4755		10	av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
4756	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int i = 0; i < sti->nb_index_entries; i++)
4757		101	av_bprintf(&bprint, "%" PRId64",", sti->index_entries[i].timestamp);
4758	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 10 times.	10	if (!av_bprint_is_complete(&bprint)) {
4759		✗	av_bprint_finalize(&bprint, NULL);
4760		✗	return AVERROR(ENOMEM);
4761			}
4762			// Remove the trailing ','
4763		10	bprint.str[--bprint.len] = '\0';
4764	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 10 times.	10	if ((ret = av_bprint_finalize(&bprint, &buf)) < 0)
4765		✗	return ret;
4766		10	av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS,
4767			buf, AV_DICT_DONT_STRDUP_VAL);
4768
4769		10	return 0;
4770			}
4771
4772		14	static int webm_dash_manifest_read_header(AVFormatContext *s)
4773			{
4774			char *buf;
4775		14	int ret = matroska_read_header(s);
4776			int64_t init_range;
4777			MatroskaTrack *tracks;
4778		14	MatroskaDemuxContext *matroska = s->priv_data;
4779	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (ret) {
4780		✗	av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4781		✗	return -1;
4782			}
4783	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) {
4784		✗	av_log(s, AV_LOG_ERROR, "No track found\n");
4785		✗	return AVERROR_INVALIDDATA;
4786			}
4787
4788	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 4 times.	14	if (!matroska->is_live) {
4789		10	buf = av_asprintf("%g", matroska->duration);
4790	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (!buf)
4791		✗	return AVERROR(ENOMEM);
4792		10	av_dict_set(&s->streams[0]->metadata, DURATION,
4793			buf, AV_DICT_DONT_STRDUP_VAL);
4794
4795			// initialization range
4796			// 5 is the offset of Cluster ID.
4797		10	init_range = avio_tell(s->pb) - 5;
4798		10	av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4799			}
4800
4801			// basename of the file
4802		14	buf = strrchr(s->url, '/');
4803	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);
4804
4805			// track number
4806		14	tracks = matroska->tracks.elem;
4807		14	av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4808
4809			// parse the cues and populate Cue related fields
4810	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 4 times.	14	if (!matroska->is_live) {
4811		10	ret = webm_dash_manifest_cues(s, init_range);
4812	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (ret < 0) {
4813		✗	av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4814		✗	return ret;
4815			}
4816			}
4817
4818			// use the bandwidth from the command line if it was provided
4819	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 12 times.	14	if (matroska->bandwidth > 0) {
4820		2	av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4821		2	matroska->bandwidth, 0);
4822			}
4823		14	return 0;
4824			}
4825
4826		28	static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4827			{
4828		28	return AVERROR_EOF;
4829			}
4830
4831			#define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4832			static const AVOption options[] = {
4833			{ "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 },
4834			{ "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 },
4835			{ NULL },
4836			};
4837
4838			static const AVClass webm_dash_class = {
4839			.class_name = "WebM DASH Manifest demuxer",
4840			.item_name = av_default_item_name,
4841			.option = options,
4842			.version = LIBAVUTIL_VERSION_INT,
4843			};
4844
4845			const FFInputFormat ff_webm_dash_manifest_demuxer = {
4846			.p.name = "webm_dash_manifest",
4847			.p.long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4848			.p.priv_class = &webm_dash_class,
4849			.priv_data_size = sizeof(MatroskaDemuxContext),
4850			.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
4851			.read_header = webm_dash_manifest_read_header,
4852			.read_packet = webm_dash_manifest_read_packet,
4853			.read_close = matroska_read_close,
4854			};
4855			#endif
4856
4857			const FFInputFormat ff_matroska_demuxer = {
4858			.p.name = "matroska,webm",
4859			.p.long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4860			.p.extensions = "mkv,mk3d,mka,mks,webm",
4861			.p.mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska",
4862			.priv_data_size = sizeof(MatroskaDemuxContext),
4863			.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
4864			.read_probe = matroska_probe,
4865			.read_header = matroska_read_header,
4866			.read_packet = matroska_read_packet,
4867			.read_close = matroska_read_close,
4868			.read_seek = matroska_read_seek,
4869			};
4870