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/dict_internal.h"
42			#include "libavutil/display.h"
43			#include "libavutil/hdr_dynamic_metadata.h"
44			#include "libavutil/intfloat.h"
45			#include "libavutil/intreadwrite.h"
46			#include "libavutil/lzo.h"
47			#include "libavutil/mastering_display_metadata.h"
48			#include "libavutil/mathematics.h"
49			#include "libavutil/mem.h"
50			#include "libavutil/opt.h"
51			#include "libavutil/pixdesc.h"
52			#include "libavutil/time_internal.h"
53			#include "libavutil/spherical.h"
54
55			#include "libavcodec/bytestream.h"
56			#include "libavcodec/defs.h"
57			#include "libavcodec/flac.h"
58			#include "libavcodec/itut35.h"
59			#include "libavcodec/mpeg4audio.h"
60			#include "libavcodec/packet_internal.h"
61
62			#include "avformat.h"
63			#include "avio_internal.h"
64			#include "demux.h"
65			#include "dovi_isom.h"
66			#include "internal.h"
67			#include "isom.h"
68			#include "matroska.h"
69			#include "oggdec.h"
70			/* For ff_codec_get_id(). */
71			#include "riff.h"
72			#include "rmsipr.h"
73
74			#if CONFIG_BZLIB
75			#include <bzlib.h>
76			#endif
77			#if CONFIG_ZLIB
78			#include <zlib.h>
79			#endif
80
81			#include "qtpalette.h"
82
83			#define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
84			#define NEEDS_CHECKING 2 /* Indicates that some error checks
85			* still need to be performed */
86			#define LEVEL_ENDED 3 /* return value of ebml_parse when the
87			* syntax level used for parsing ended. */
88			#define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
89			* of unkown, potentially damaged data is encountered,
90			* it is considered an error. */
91			#define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
92			* to this many bytes of unknown data for the
93			* SKIP_THRESHOLD check. */
94
95			typedef enum {
96			EBML_NONE,
97			EBML_UINT,
98			EBML_SINT,
99			EBML_FLOAT,
100			EBML_STR,
101			EBML_UTF8,
102			EBML_BIN,
103			EBML_NEST,
104			EBML_LEVEL1,
105			EBML_STOP,
106			EBML_TYPE_COUNT
107			} EbmlType;
108
109			typedef struct CountedElement {
110			union {
111			uint64_t u;
112			int64_t i;
113			double f;
114			char *s;
115			} el;
116			unsigned count;
117			} CountedElement;
118
119			typedef const struct EbmlSyntax {
120			uint32_t id;
121			uint8_t type;
122			uint8_t is_counted;
123			size_t list_elem_size;
124			size_t data_offset;
125			union {
126			int64_t i;
127			uint64_t u;
128			double f;
129			const char *s;
130			const struct EbmlSyntax *n;
131			} def;
132			} EbmlSyntax;
133
134			typedef struct EbmlList {
135			int nb_elem;
136			unsigned int alloc_elem_size;
137			void *elem;
138			} EbmlList;
139
140			typedef struct EbmlBin {
141			int size;
142			AVBufferRef *buf;
143			uint8_t *data;
144			int64_t pos;
145			} EbmlBin;
146
147			typedef struct Ebml {
148			uint64_t version;
149			uint64_t max_size;
150			uint64_t id_length;
151			char *doctype;
152			uint64_t doctype_version;
153			} Ebml;
154
155			typedef struct MatroskaTrackCompression {
156			uint64_t algo;
157			EbmlBin settings;
158			} MatroskaTrackCompression;
159
160			typedef struct MatroskaTrackEncryption {
161			uint64_t algo;
162			EbmlBin key_id;
163			} MatroskaTrackEncryption;
164
165			typedef struct MatroskaTrackEncoding {
166			uint64_t scope;
167			uint64_t type;
168			MatroskaTrackCompression compression;
169			MatroskaTrackEncryption encryption;
170			} MatroskaTrackEncoding;
171
172			typedef struct MatroskaMasteringMeta {
173			double r_x;
174			double r_y;
175			double g_x;
176			double g_y;
177			double b_x;
178			double b_y;
179			double white_x;
180			double white_y;
181			double max_luminance;
182			CountedElement min_luminance;
183			} MatroskaMasteringMeta;
184
185			typedef struct MatroskaTrackVideoColor {
186			uint64_t matrix_coefficients;
187			uint64_t bits_per_channel;
188			uint64_t chroma_sub_horz;
189			uint64_t chroma_sub_vert;
190			uint64_t cb_sub_horz;
191			uint64_t cb_sub_vert;
192			uint64_t chroma_siting_horz;
193			uint64_t chroma_siting_vert;
194			uint64_t range;
195			uint64_t transfer_characteristics;
196			uint64_t primaries;
197			uint64_t max_cll;
198			uint64_t max_fall;
199			MatroskaMasteringMeta mastering_meta;
200			} MatroskaTrackVideoColor;
201
202			typedef struct MatroskaTrackVideoProjection {
203			uint64_t type;
204			EbmlBin private;
205			double yaw;
206			double pitch;
207			double roll;
208			} MatroskaTrackVideoProjection;
209
210			typedef struct MatroskaTrackVideo {
211			double frame_rate;
212			uint64_t display_width;
213			uint64_t display_height;
214			uint64_t pixel_width;
215			uint64_t pixel_height;
216			uint64_t cropped_width;
217			uint64_t cropped_height;
218			EbmlBin color_space;
219			uint64_t pixel_cropt;
220			uint64_t pixel_cropl;
221			uint64_t pixel_cropb;
222			uint64_t pixel_cropr;
223			uint64_t display_unit;
224			uint64_t interlaced;
225			uint64_t field_order;
226			uint64_t stereo_mode;
227			uint64_t alpha_mode;
228			EbmlList color;
229			MatroskaTrackVideoProjection projection;
230			} MatroskaTrackVideo;
231
232			typedef struct MatroskaTrackAudio {
233			double samplerate;
234			double out_samplerate;
235			uint64_t bitdepth;
236			uint64_t channels;
237
238			/* real audio header (extracted from extradata) */
239			int coded_framesize;
240			int sub_packet_h;
241			int frame_size;
242			int sub_packet_size;
243			int sub_packet_cnt;
244			int pkt_cnt;
245			uint64_t buf_timecode;
246			uint8_t *buf;
247			} MatroskaTrackAudio;
248
249			typedef struct MatroskaTrackPlane {
250			uint64_t uid;
251			uint64_t type;
252			} MatroskaTrackPlane;
253
254			typedef struct MatroskaTrackOperation {
255			EbmlList combine_planes;
256			} MatroskaTrackOperation;
257
258			typedef struct MatroskaBlockAdditionMapping {
259			uint64_t value;
260			char *name;
261			uint64_t type;
262			EbmlBin extradata;
263			} MatroskaBlockAdditionMapping;
264
265			typedef struct MatroskaTrack {
266			uint64_t num;
267			uint64_t uid;
268			uint64_t type;
269			char *name;
270			char *codec_id;
271			EbmlBin codec_priv;
272			char *language;
273			double time_scale;
274			uint64_t default_duration;
275			uint64_t flag_default;
276			uint64_t flag_forced;
277			uint64_t flag_comment;
278			uint64_t flag_hearingimpaired;
279			uint64_t flag_visualimpaired;
280			uint64_t flag_textdescriptions;
281			CountedElement flag_original;
282			uint64_t seek_preroll;
283			MatroskaTrackVideo video;
284			MatroskaTrackAudio audio;
285			MatroskaTrackOperation operation;
286			EbmlList encodings;
287			uint64_t codec_delay;
288			uint64_t codec_delay_in_track_tb;
289
290			AVStream *stream;
291			int64_t end_timecode;
292			int ms_compat;
293			int needs_decoding;
294			uint64_t max_block_additional_id;
295			EbmlList block_addition_mappings;
296
297			uint32_t palette[AVPALETTE_COUNT];
298			int has_palette;
299			} MatroskaTrack;
300
301			typedef struct MatroskaAttachment {
302			uint64_t uid;
303			char *filename;
304			char *description;
305			char *mime;
306			EbmlBin bin;
307
308			AVStream *stream;
309			} MatroskaAttachment;
310
311			typedef struct MatroskaChapter {
312			uint64_t start;
313			uint64_t end;
314			uint64_t uid;
315			char *title;
316
317			AVChapter *chapter;
318			} MatroskaChapter;
319
320			typedef struct MatroskaIndexPos {
321			uint64_t track;
322			uint64_t pos;
323			} MatroskaIndexPos;
324
325			typedef struct MatroskaIndex {
326			uint64_t time;
327			EbmlList pos;
328			} MatroskaIndex;
329
330			typedef struct MatroskaTag {
331			char *name;
332			char *string;
333			char *lang;
334			uint64_t def;
335			EbmlList sub;
336			} MatroskaTag;
337
338			typedef struct MatroskaTagTarget {
339			char *type;
340			uint64_t typevalue;
341			uint64_t trackuid;
342			uint64_t chapteruid;
343			uint64_t attachuid;
344			} MatroskaTagTarget;
345
346			typedef struct MatroskaTags {
347			MatroskaTagTarget target;
348			EbmlList tag;
349			} MatroskaTags;
350
351			typedef struct MatroskaSeekhead {
352			uint64_t id;
353			uint64_t pos;
354			} MatroskaSeekhead;
355
356			typedef struct MatroskaLevel {
357			uint64_t start;
358			uint64_t length;
359			} MatroskaLevel;
360
361			typedef struct MatroskaBlockMore {
362			uint64_t additional_id;
363			EbmlBin additional;
364			} MatroskaBlockMore;
365
366			typedef struct MatroskaBlock {
367			uint64_t duration;
368			CountedElement reference;
369			uint64_t non_simple;
370			EbmlBin bin;
371			EbmlList blockmore;
372			int64_t discard_padding;
373			} MatroskaBlock;
374
375			typedef struct MatroskaCluster {
376			MatroskaBlock block;
377			uint64_t timecode;
378			int64_t pos;
379			} MatroskaCluster;
380
381			typedef struct MatroskaLevel1Element {
382			int64_t pos;
383			uint32_t id;
384			int parsed;
385			} MatroskaLevel1Element;
386
387			typedef struct MatroskaDemuxContext {
388			const AVClass *class;
389			AVFormatContext *ctx;
390
391			/* EBML stuff */
392			MatroskaLevel levels[EBML_MAX_DEPTH];
393			int num_levels;
394			uint32_t current_id;
395			int64_t resync_pos;
396			int unknown_count;
397
398			uint64_t time_scale;
399			double duration;
400			char *title;
401			char *muxingapp;
402			EbmlBin date_utc;
403			EbmlList tracks;
404			EbmlList attachments;
405			EbmlList chapters;
406			EbmlList index;
407			EbmlList tags;
408			EbmlList seekhead;
409
410			/* byte position of the segment inside the stream */
411			int64_t segment_start;
412
413			/* This packet coincides with FFFormatContext.parse_pkt
414			* and is not owned by us. */
415			AVPacket *pkt;
416
417			/* the packet queue */
418			PacketList queue;
419
420			int done;
421
422			/* What to skip before effectively reading a packet. */
423			int skip_to_keyframe;
424			uint64_t skip_to_timecode;
425
426			/* File has a CUES element, but we defer parsing until it is needed. */
427			int cues_parsing_deferred;
428
429			/* Level1 elements and whether they were read yet */
430			MatroskaLevel1Element level1_elems[64];
431			int num_level1_elems;
432
433			MatroskaCluster current_cluster;
434
435			int is_webm;
436
437			/* WebM DASH Manifest live flag */
438			int is_live;
439
440			/* Bandwidth value for WebM DASH Manifest */
441			int bandwidth;
442			} MatroskaDemuxContext;
443
444			#define CHILD_OF(parent) { .def = { .n = parent } }
445
446			// The following forward declarations need their size because
447			// a tentative definition with internal linkage must not be an
448			// incomplete type (6.7.2 in C90, 6.9.2 in C99).
449			// Removing the sizes breaks MSVC.
450			static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
451			matroska_track[33], matroska_track_encoding[6], matroska_track_encodings[2],
452			matroska_track_combine_planes[2], matroska_track_operation[2], matroska_block_addition_mapping[5], matroska_tracks[2],
453			matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
454			matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
455			matroska_blockadditions[2], matroska_blockgroup[8], matroska_cluster_parsing[8];
456
457			static EbmlSyntax ebml_header[] = {
458			{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
459			{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, 0, offsetof(Ebml, max_size), { .u = 8 } },
460			{ EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, 0, offsetof(Ebml, id_length), { .u = 4 } },
461			{ EBML_ID_DOCTYPE, EBML_STR, 0, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
462			{ EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
463			{ EBML_ID_EBMLVERSION, EBML_NONE },
464			{ EBML_ID_DOCTYPEVERSION, EBML_NONE },
465			CHILD_OF(ebml_syntax)
466			};
467
468			static EbmlSyntax ebml_syntax[] = {
469			{ EBML_ID_HEADER, EBML_NEST, 0, 0, 0, { .n = ebml_header } },
470			{ MATROSKA_ID_SEGMENT, EBML_STOP },
471			{ 0 }
472			};
473
474			static EbmlSyntax matroska_info[] = {
475			{ MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
476			{ MATROSKA_ID_DURATION, EBML_FLOAT, 0, 0, offsetof(MatroskaDemuxContext, duration) },
477			{ MATROSKA_ID_TITLE, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, title) },
478			{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
479			{ MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, muxingapp) },
480			{ MATROSKA_ID_DATEUTC, EBML_BIN, 0, 0, offsetof(MatroskaDemuxContext, date_utc) },
481			{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
482			CHILD_OF(matroska_segment)
483			};
484
485			static EbmlSyntax matroska_mastering_meta[] = {
486			{ MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_x) },
487			{ MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_y) },
488			{ MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_x) },
489			{ MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_y) },
490			{ MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_x) },
491			{ MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_y) },
492			{ MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_x) },
493			{ MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_y) },
494			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 1, 0, offsetof(MatroskaMasteringMeta, min_luminance) },
495			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, max_luminance) },
496			CHILD_OF(matroska_track_video_color)
497			};
498
499			static EbmlSyntax matroska_track_video_color[] = {
500			{ MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
501			{ MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u = 0 } },
502			{ MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz) },
503			{ MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert) },
504			{ MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz) },
505			{ MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert) },
506			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
507			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
508			{ MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
509			{ MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
510			{ MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
511			{ MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_cll) },
512			{ MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_fall) },
513			{ MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
514			CHILD_OF(matroska_track_video)
515			};
516
517			static EbmlSyntax matroska_track_video_projection[] = {
518			{ MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
519			{ MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideoProjection, private) },
520			{ MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f = 0.0 } },
521			{ MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f = 0.0 } },
522			{ MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f = 0.0 } },
523			CHILD_OF(matroska_track_video)
524			};
525
526			static EbmlSyntax matroska_track_video[] = {
527			{ MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideo, frame_rate) },
528			{ MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
529			{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
530			{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_width) },
531			{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_height) },
532			{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideo, color_space) },
533			{ MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, alpha_mode), { .u = 0 } },
534			{ MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
535			{ MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
536			{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropb), {.u = 0 } },
537			{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropt), {.u = 0 } },
538			{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropl), {.u = 0 } },
539			{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropr), {.u = 0 } },
540			{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
541			{ MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
542			{ MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
543			{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
544			{ MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
545			CHILD_OF(matroska_track)
546			};
547
548			static EbmlSyntax matroska_track_audio[] = {
549			{ MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
550			{ MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
551			{ MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, bitdepth) },
552			{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
553			CHILD_OF(matroska_track)
554			};
555
556			static EbmlSyntax matroska_track_encoding_compression[] = {
557			{ MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackCompression, algo), { .u = MATROSKA_TRACK_ENCODING_COMP_ZLIB } },
558			{ MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, 0, offsetof(MatroskaTrackCompression, settings) },
559			CHILD_OF(matroska_track_encoding)
560			};
561
562			static EbmlSyntax matroska_track_encoding_encryption[] = {
563			{ MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
564			{ MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, 0, offsetof(MatroskaTrackEncryption,key_id) },
565			{ MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
566			{ MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
567			{ MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
568			{ MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
569			{ MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
570			CHILD_OF(matroska_track_encoding)
571			};
572			static EbmlSyntax matroska_track_encoding[] = {
573			{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
574			{ MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
575			{ MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
576			{ MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
577			{ MATROSKA_ID_ENCODINGORDER, EBML_NONE },
578			CHILD_OF(matroska_track_encodings)
579			};
580
581			static EbmlSyntax matroska_track_encodings[] = {
582			{ MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, 0, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
583			CHILD_OF(matroska_track)
584			};
585
586			static EbmlSyntax matroska_track_plane[] = {
587			{ MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,uid) },
588			{ MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,type) },
589			CHILD_OF(matroska_track_combine_planes)
590			};
591
592			static EbmlSyntax matroska_track_combine_planes[] = {
593			{ MATROSKA_ID_TRACKPLANE, EBML_NEST, 0, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
594			CHILD_OF(matroska_track_operation)
595			};
596
597			static EbmlSyntax matroska_track_operation[] = {
598			{ MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, 0, {.n = matroska_track_combine_planes} },
599			CHILD_OF(matroska_track)
600			};
601
602			static EbmlSyntax matroska_block_addition_mapping[] = {
603			{ MATROSKA_ID_BLKADDIDVALUE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, value) },
604			{ MATROSKA_ID_BLKADDIDNAME, EBML_STR, 0, 0, offsetof(MatroskaBlockAdditionMapping, name) },
605			{ MATROSKA_ID_BLKADDIDTYPE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, type), { .u = MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT } },
606			{ MATROSKA_ID_BLKADDIDEXTRADATA, EBML_BIN, 0, 0, offsetof(MatroskaBlockAdditionMapping, extradata) },
607			CHILD_OF(matroska_track)
608			};
609
610			static EbmlSyntax matroska_track[] = {
611			{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, 0, offsetof(MatroskaTrack, num) },
612			{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTrack, name) },
613			{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, uid) },
614			{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrack, type) },
615			{ MATROSKA_ID_CODECID, EBML_STR, 0, 0, offsetof(MatroskaTrack, codec_id) },
616			{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrack, codec_priv) },
617			{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, codec_delay), { .u = 0 } },
618			{ MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
619			{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
620			{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
621			{ MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
622			{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
623			{ MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
624			{ MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_hearingimpaired), { .u = 0 } },
625			{ MATROSKA_ID_TRACKFLAGVISUALIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_visualimpaired), { .u = 0 } },
626			{ MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_textdescriptions), { .u = 0 } },
627			{ MATROSKA_ID_TRACKFLAGORIGINAL, EBML_UINT, 1, 0, offsetof(MatroskaTrack, flag_original), {.u = 0 } },
628			{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
629			{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
630			{ MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
631			{ MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, 0, { .n = matroska_track_encodings } },
632			{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, max_block_additional_id), { .u = 0 } },
633			{ MATROSKA_ID_TRACKBLKADDMAPPING, EBML_NEST, 0, sizeof(MatroskaBlockAdditionMapping), offsetof(MatroskaTrack, block_addition_mappings), { .n = matroska_block_addition_mapping } },
634			{ MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, 0, offsetof(MatroskaTrack, seek_preroll), { .u = 0 } },
635			{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
636			{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
637			{ MATROSKA_ID_CODECNAME, EBML_NONE },
638			{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
639			{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
640			{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
641			{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
642			{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
643			CHILD_OF(matroska_tracks)
644			};
645
646			static EbmlSyntax matroska_tracks[] = {
647			{ MATROSKA_ID_TRACKENTRY, EBML_NEST, 0, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
648			CHILD_OF(matroska_segment)
649			};
650
651			static EbmlSyntax matroska_attachment[] = {
652			{ MATROSKA_ID_FILEUID, EBML_UINT, 0, 0, offsetof(MatroskaAttachment, uid) },
653			{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, filename) },
654			{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, 0, offsetof(MatroskaAttachment, mime) },
655			{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, 0, offsetof(MatroskaAttachment, bin) },
656			{ MATROSKA_ID_FILEDESC, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, description) },
657			CHILD_OF(matroska_attachments)
658			};
659
660			static EbmlSyntax matroska_attachments[] = {
661			{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, 0, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
662			CHILD_OF(matroska_segment)
663			};
664
665			static EbmlSyntax matroska_chapter_display[] = {
666			{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaChapter, title) },
667			{ MATROSKA_ID_CHAPLANG, EBML_NONE },
668			{ MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
669			CHILD_OF(matroska_chapter_entry)
670			};
671
672			static EbmlSyntax matroska_chapter_entry[] = {
673			{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
674			{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
675			{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaChapter, uid) },
676			{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter_display } },
677			{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
678			{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
679			{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
680			{ MATROSKA_ID_CHAPTERATOM, EBML_NONE },
681			CHILD_OF(matroska_chapter)
682			};
683
684			static EbmlSyntax matroska_chapter[] = {
685			{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, 0, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
686			{ MATROSKA_ID_EDITIONUID, EBML_NONE },
687			{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
688			{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
689			{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
690			CHILD_OF(matroska_chapters)
691			};
692
693			static EbmlSyntax matroska_chapters[] = {
694			{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter } },
695			CHILD_OF(matroska_segment)
696			};
697
698			static EbmlSyntax matroska_index_pos[] = {
699			{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, track) },
700			{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, pos) },
701			{ MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
702			{ MATROSKA_ID_CUEDURATION, EBML_NONE },
703			{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
704			CHILD_OF(matroska_index_entry)
705			};
706
707			static EbmlSyntax matroska_index_entry[] = {
708			{ MATROSKA_ID_CUETIME, EBML_UINT, 0, 0, offsetof(MatroskaIndex, time) },
709			{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, 0, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
710			CHILD_OF(matroska_index)
711			};
712
713			static EbmlSyntax matroska_index[] = {
714			{ MATROSKA_ID_POINTENTRY, EBML_NEST, 0, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
715			CHILD_OF(matroska_segment)
716			};
717
718			static EbmlSyntax matroska_simpletag[] = {
719			{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTag, name) },
720			{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaTag, string) },
721			{ MATROSKA_ID_TAGLANG, EBML_STR, 0, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
722			{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
723			{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
724			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
725			CHILD_OF(matroska_tag)
726			};
727
728			static EbmlSyntax matroska_tagtargets[] = {
729			{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, 0, offsetof(MatroskaTagTarget, type) },
730			{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
731			{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, trackuid), { .u = 0 } },
732			{ MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, chapteruid), { .u = 0 } },
733			{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, attachuid), { .u = 0 } },
734			CHILD_OF(matroska_tag)
735			};
736
737			static EbmlSyntax matroska_tag[] = {
738			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
739			{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
740			CHILD_OF(matroska_tags)
741			};
742
743			static EbmlSyntax matroska_tags[] = {
744			{ MATROSKA_ID_TAG, EBML_NEST, 0, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
745			CHILD_OF(matroska_segment)
746			};
747
748			static EbmlSyntax matroska_seekhead_entry[] = {
749			{ MATROSKA_ID_SEEKID, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, id) },
750			{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
751			CHILD_OF(matroska_seekhead)
752			};
753
754			static EbmlSyntax matroska_seekhead[] = {
755			{ MATROSKA_ID_SEEKENTRY, EBML_NEST, 0, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
756			CHILD_OF(matroska_segment)
757			};
758
759			static EbmlSyntax matroska_segment[] = {
760			{ MATROSKA_ID_CLUSTER, EBML_STOP },
761			{ MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, 0, { .n = matroska_info } },
762			{ MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tracks } },
763			{ MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_attachments } },
764			{ MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_chapters } },
765			{ MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, 0, { .n = matroska_index } },
766			{ MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tags } },
767			{ MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, 0, { .n = matroska_seekhead } },
768			{ 0 } /* We don't want to go back to level 0, so don't add the parent. */
769			};
770
771			static EbmlSyntax matroska_segments[] = {
772			{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, 0, { .n = matroska_segment } },
773			{ 0 }
774			};
775
776			static EbmlSyntax matroska_blockmore[] = {
777			{ MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, 0, offsetof(MatroskaBlockMore,additional_id), { .u = MATROSKA_BLOCK_ADD_ID_OPAQUE } },
778			{ MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, 0, offsetof(MatroskaBlockMore,additional) },
779			CHILD_OF(matroska_blockadditions)
780			};
781
782			static EbmlSyntax matroska_blockadditions[] = {
783			{ MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, sizeof(MatroskaBlockMore), offsetof(MatroskaBlock, blockmore), { .n = matroska_blockmore } },
784			CHILD_OF(matroska_blockgroup)
785			};
786
787			static EbmlSyntax matroska_blockgroup[] = {
788			{ MATROSKA_ID_BLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
789			{ MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, 0, { .n = matroska_blockadditions} },
790			{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, 0, offsetof(MatroskaBlock, duration) },
791			{ MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, 0, offsetof(MatroskaBlock, discard_padding) },
792			{ MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 1, 0, offsetof(MatroskaBlock, reference) },
793			{ MATROSKA_ID_CODECSTATE, EBML_NONE },
794			{ 1, EBML_UINT, 0, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
795			CHILD_OF(matroska_cluster_parsing)
796			};
797
798			// The following array contains SimpleBlock and BlockGroup twice
799			// in order to reuse the other values for matroska_cluster_enter.
800			static EbmlSyntax matroska_cluster_parsing[] = {
801			{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
802			{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, 0, { .n = matroska_blockgroup } },
803			{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, 0, offsetof(MatroskaCluster, timecode) },
804			{ MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
805			{ MATROSKA_ID_BLOCKGROUP, EBML_STOP },
806			{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
807			{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
808			CHILD_OF(matroska_segment)
809			};
810
811			static EbmlSyntax matroska_cluster_enter[] = {
812			{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, 0, { .n = &matroska_cluster_parsing[2] } },
813			{ 0 }
814			};
815			#undef CHILD_OF
816
817			static const CodecMime mkv_image_mime_tags[] = {
818			{"image/gif" , AV_CODEC_ID_GIF},
819			{"image/jpeg" , AV_CODEC_ID_MJPEG},
820			{"image/png" , AV_CODEC_ID_PNG},
821			{"image/tiff" , AV_CODEC_ID_TIFF},
822
823			{"" , AV_CODEC_ID_NONE}
824			};
825
826			static const CodecMime mkv_mime_tags[] = {
827			{"application/x-truetype-font", AV_CODEC_ID_TTF},
828			{"application/x-font" , AV_CODEC_ID_TTF},
829			{"application/vnd.ms-opentype", AV_CODEC_ID_OTF},
830			{"binary" , AV_CODEC_ID_BIN_DATA},
831
832			{"" , AV_CODEC_ID_NONE}
833			};
834
835			static const char * const matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT] = {
836			"left",
837			"right",
838			"background",
839			};
840
841			static const char *const matroska_doctypes[] = { "matroska", "webm" };
842
843			/*
844			* This function prepares the status for parsing of level 1 elements.
845			*/
846		198	static int matroska_reset_status(MatroskaDemuxContext *matroska,
847			uint32_t id, int64_t position)
848			{
849		198	int64_t err = 0;
850	2/2 ✓ Branch 0 taken 185 times. ✓ Branch 1 taken 13 times.	198	if (position >= 0) {
851		185	err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
852	1/2 ✓ Branch 0 taken 185 times. ✗ Branch 1 not taken.	185	if (err > 0)
853		185	err = 0;
854			} else
855		13	position = avio_tell(matroska->ctx->pb);
856
857		198	matroska->current_id = id;
858		198	matroska->num_levels = 1;
859		198	matroska->unknown_count = 0;
860		198	matroska->resync_pos = position;
861	2/2 ✓ Branch 0 taken 35 times. ✓ Branch 1 taken 163 times.	198	if (id)
862		35	matroska->resync_pos -= (av_log2(id) + 7) / 8;
863
864		198	return err;
865			}
866
867		13	static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
868			{
869		13	AVIOContext *pb = matroska->ctx->pb;
870			uint32_t id;
871
872			/* Try to seek to the last position to resync from. If this doesn't work,
873			* we resync from the earliest position available: The start of the buffer. */
874	3/4 ✓ Branch 1 taken 13 times. ✗ Branch 2 not taken. ✓ Branch 4 taken 2 times. ✓ Branch 5 taken 11 times.	13	if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
875		2	av_log(matroska->ctx, AV_LOG_WARNING,
876			"Seek to desired resync point failed. Seeking to "
877			"earliest point available instead.\n");
878	1/2 ✓ Branch 1 taken 2 times. ✗ Branch 2 not taken.	2	avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
879			last_pos + 1), SEEK_SET);
880			}
881
882		13	id = avio_rb32(pb);
883
884			// try to find a toplevel element
885	2/2 ✓ Branch 1 taken 690589 times. ✓ Branch 2 taken 10 times.	690599	while (!avio_feof(pb)) {
886	3/6 ✓ Branch 0 taken 690589 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690589 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 690589 times. ✗ Branch 5 not taken.	690589	if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
887	3/4 ✓ Branch 0 taken 690589 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690587 times. ✓ Branch 3 taken 2 times.	690589	id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
888	3/4 ✓ Branch 0 taken 690587 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690586 times. ✓ Branch 3 taken 1 times.	690587	id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
889	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 690586 times.	690586	id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
890			/* Prepare the context for parsing of a level 1 element. */
891		3	matroska_reset_status(matroska, id, -1);
892			/* Given that we are here means that an error has occurred,
893			* so treat the segment as unknown length in order not to
894			* discard valid data that happens to be beyond the designated
895			* end of the segment. */
896		3	matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
897		3	return 0;
898			}
899		690586	id = (id << 8) | avio_r8(pb);
900			}
901
902		10	matroska->done = 1;
903	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return pb->error ? pb->error : AVERROR_EOF;
904			}
905
906			/*
907			* Read: an "EBML number", which is defined as a variable-length
908			* array of bytes. The first byte indicates the length by giving a
909			* number of 0-bits followed by a one. The position of the first
910			* "one" bit inside the first byte indicates the length of this
911			* number.
912			* Returns: number of bytes read, < 0 on error
913			*/
914		142550	static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
915			int max_size, uint64_t *number, int eof_forbidden)
916			{
917		142550	int read, n = 1;
918			uint64_t total;
919			int64_t pos;
920
921			/* The first byte tells us the length in bytes - except when it is zero. */
922		142550	total = avio_r8(pb);
923	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 142536 times.	142550	if (pb->eof_reached)
924		14	goto err;
925
926			/* get the length of the EBML number */
927		142536	read = 8 - ff_log2_tab[total];
928
929	2/4 ✓ Branch 0 taken 142536 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 142536 times.	142536	if (!total || read > max_size) {
930		✗	pos = avio_tell(pb) - 1;
931		✗	if (!total) {
932		✗	av_log(matroska->ctx, AV_LOG_ERROR,
933			"0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
934			"of an EBML number\n", pos, pos);
935			} else {
936		✗	av_log(matroska->ctx, AV_LOG_ERROR,
937			"Length %d indicated by an EBML number's first byte 0x%02x "
938			"at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
939		✗	read, (uint8_t) total, pos, pos, max_size);
940			}
941		✗	return AVERROR_INVALIDDATA;
942			}
943
944			/* read out length */
945		142536	total ^= 1 << ff_log2_tab[total];
946	2/2 ✓ Branch 0 taken 71367 times. ✓ Branch 1 taken 142536 times.	213903	while (n++ < read)
947		71367	total = (total << 8) | avio_r8(pb);
948
949	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 142536 times.	142536	if (pb->eof_reached) {
950		✗	eof_forbidden = 1;
951		✗	goto err;
952			}
953
954		142536	*number = total;
955
956		142536	return read;
957
958		14	err:
959		14	pos = avio_tell(pb);
960	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (pb->error) {
961		✗	av_log(matroska->ctx, AV_LOG_ERROR,
962			"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
963			pos, pos);
964		✗	return pb->error;
965			}
966	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (eof_forbidden) {
967		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
968			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
969		✗	return AVERROR(EIO);
970			}
971		14	return AVERROR_EOF;
972			}
973
974			/**
975			* Read a EBML length value.
976			* This needs special handling for the "unknown length" case which has multiple
977			* encodings.
978			*/
979		55757	static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
980			uint64_t *number)
981			{
982		55757	int res = ebml_read_num(matroska, pb, 8, number, 1);
983	3/4 ✓ Branch 0 taken 55757 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 17 times. ✓ Branch 3 taken 55740 times.	55757	if (res > 0 && *number + 1 == 1ULL << (7 * res))
984		17	*number = EBML_UNKNOWN_LENGTH;
985		55757	return res;
986			}
987
988			/*
989			* Read the next element as an unsigned int.
990			* Returns NEEDS_CHECKING unless size == 0.
991			*/
992		10622	static int ebml_read_uint(AVIOContext *pb, int size,
993			uint64_t default_value, uint64_t *num)
994			{
995		10622	int n = 0;
996
997	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10622 times.	10622	if (size == 0) {
998		✗	*num = default_value;
999		✗	return 0;
1000			}
1001			/* big-endian ordering; build up number */
1002		10622	*num = 0;
1003	2/2 ✓ Branch 0 taken 26882 times. ✓ Branch 1 taken 10622 times.	37504	while (n++ < size)
1004		26882	*num = (*num << 8) | avio_r8(pb);
1005
1006		10622	return NEEDS_CHECKING;
1007			}
1008
1009			/*
1010			* Read the next element as a signed int.
1011			* Returns NEEDS_CHECKING unless size == 0.
1012			*/
1013		160	static int ebml_read_sint(AVIOContext *pb, int size,
1014			int64_t default_value, int64_t *num)
1015			{
1016		160	int n = 1;
1017
1018	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 160 times.	160	if (size == 0) {
1019		✗	*num = default_value;
1020		✗	return 0;
1021			} else {
1022		160	*num = sign_extend(avio_r8(pb), 8);
1023
1024			/* big-endian ordering; build up number */
1025	2/2 ✓ Branch 0 taken 95 times. ✓ Branch 1 taken 160 times.	255	while (n++ < size)
1026		95	*num = ((uint64_t)*num << 8) | avio_r8(pb);
1027			}
1028
1029		160	return NEEDS_CHECKING;
1030			}
1031
1032			/*
1033			* Read the next element as a float.
1034			* Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
1035			*/
1036		745	static int ebml_read_float(AVIOContext *pb, int size,
1037			double default_value, double *num)
1038			{
1039	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 745 times.	745	if (size == 0) {
1040		✗	*num = default_value;
1041		✗	return 0;
1042	2/2 ✓ Branch 0 taken 86 times. ✓ Branch 1 taken 659 times.	745	} else if (size == 4) {
1043		86	*num = av_int2float(avio_rb32(pb));
1044	1/2 ✓ Branch 0 taken 659 times. ✗ Branch 1 not taken.	659	} else if (size == 8) {
1045		659	*num = av_int2double(avio_rb64(pb));
1046			} else
1047		✗	return AVERROR_INVALIDDATA;
1048
1049		745	return NEEDS_CHECKING;
1050			}
1051
1052			/*
1053			* Read the next element as an ASCII string.
1054			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1055			*/
1056		2325	static int ebml_read_ascii(AVIOContext *pb, int size,
1057			const char *default_value, char **str)
1058			{
1059			char *res;
1060			int ret;
1061
1062	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2325 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	2325	if (size == 0 && default_value) {
1063		✗	res = av_strdup(default_value);
1064		✗	if (!res)
1065		✗	return AVERROR(ENOMEM);
1066			} else {
1067			/* EBML strings are usually not 0-terminated, so we allocate one
1068			* byte more, read the string and NUL-terminate it ourselves. */
1069	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2325 times.	2325	if (!(res = av_malloc(size + 1)))
1070		✗	return AVERROR(ENOMEM);
1071	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2325 times.	2325	if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
1072		✗	av_free(res);
1073		✗	return ret < 0 ? ret : NEEDS_CHECKING;
1074			}
1075		2325	(res)[size] = '\0';
1076			}
1077		2325	av_free(*str);
1078		2325	*str = res;
1079
1080		2325	return 0;
1081			}
1082
1083			/*
1084			* Read the next element as binary data.
1085			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1086			*/
1087		31040	static int ebml_read_binary(AVIOContext *pb, int length,
1088			int64_t pos, EbmlBin *bin)
1089			{
1090			int ret;
1091
1092		31040	ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1093	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31040 times.	31040	if (ret < 0)
1094		✗	return ret;
1095		31040	memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1096
1097		31040	bin->data = bin->buf->data;
1098		31040	bin->size = length;
1099		31040	bin->pos = pos;
1100	2/2 ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 31030 times.	31040	if ((ret = avio_read(pb, bin->data, length)) != length) {
1101		10	av_buffer_unref(&bin->buf);
1102		10	bin->data = NULL;
1103		10	bin->size = 0;
1104	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return ret < 0 ? ret : NEEDS_CHECKING;
1105			}
1106
1107		31030	return 0;
1108			}
1109
1110			/*
1111			* Read the next element, but only the header. The contents
1112			* are supposed to be sub-elements which can be read separately.
1113			* 0 is success, < 0 is failure.
1114			*/
1115		7754	static int ebml_read_master(MatroskaDemuxContext *matroska,
1116			uint64_t length, int64_t pos)
1117			{
1118			MatroskaLevel *level;
1119
1120	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7754 times.	7754	if (matroska->num_levels >= EBML_MAX_DEPTH) {
1121		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1122			"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1123		✗	return AVERROR(ENOSYS);
1124			}
1125
1126		7754	level = &matroska->levels[matroska->num_levels++];
1127		7754	level->start = pos;
1128		7754	level->length = length;
1129
1130		7754	return 0;
1131			}
1132
1133			/*
1134			* Read a signed "EBML number"
1135			* Return: number of bytes processed, < 0 on error
1136			*/
1137		236	static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1138			AVIOContext *pb, int64_t *num)
1139			{
1140			uint64_t unum;
1141			int res;
1142
1143			/* read as unsigned number first */
1144	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 236 times.	236	if ((res = ebml_read_num(matroska, pb, 8, &unum, 1)) < 0)
1145		✗	return res;
1146
1147			/* make signed (weird way) */
1148		236	*num = unum - ((1LL << (7 * res - 1)) - 1);
1149
1150		236	return res;
1151			}
1152
1153			static int ebml_parse(MatroskaDemuxContext *matroska,
1154			EbmlSyntax *syntax, void *data);
1155
1156		57637	static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1157			{
1158			int i;
1159
1160			// Whoever touches this should be aware of the duplication
1161			// existing in matroska_cluster_parsing.
1162	2/2 ✓ Branch 0 taken 119773 times. ✓ Branch 1 taken 728 times.	120501	for (i = 0; syntax[i].id; i++)
1163	2/2 ✓ Branch 0 taken 56909 times. ✓ Branch 1 taken 62864 times.	119773	if (id == syntax[i].id)
1164		56909	break;
1165
1166		57637	return &syntax[i];
1167			}
1168
1169		7754	static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1170			void *data)
1171			{
1172			int res;
1173
1174	1/2 ✓ Branch 0 taken 7754 times. ✗ Branch 1 not taken.	7754	if (data) {
1175	2/2 ✓ Branch 0 taken 49157 times. ✓ Branch 1 taken 7754 times.	56911	for (int i = 0; syntax[i].id; i++) {
1176		49157	void *dst = (char *)data + syntax[i].data_offset;
1177	5/5 ✓ Branch 0 taken 21134 times. ✓ Branch 1 taken 964 times. ✓ Branch 2 taken 1412 times. ✓ Branch 3 taken 3964 times. ✓ Branch 4 taken 21683 times.	49157	switch (syntax[i].type) {
1178		21134	case EBML_UINT:
1179		21134	*(uint64_t *)dst = syntax[i].def.u;
1180		21134	break;
1181		964	case EBML_SINT:
1182		964	*(int64_t *) dst = syntax[i].def.i;
1183		964	break;
1184		1412	case EBML_FLOAT:
1185		1412	*(double *) dst = syntax[i].def.f;
1186		1412	break;
1187		3964	case EBML_STR:
1188			case EBML_UTF8:
1189			// the default may be NULL
1190	2/2 ✓ Branch 0 taken 1242 times. ✓ Branch 1 taken 2722 times.	3964	if (syntax[i].def.s) {
1191		1242	*(char**)dst = av_strdup(syntax[i].def.s);
1192	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1242 times.	1242	if (!*(char**)dst)
1193		✗	return AVERROR(ENOMEM);
1194			}
1195		3964	break;
1196			}
1197			}
1198
1199	2/2 ✓ Branch 0 taken 51 times. ✓ Branch 1 taken 7703 times.	7754	if (!matroska->levels[matroska->num_levels - 1].length) {
1200		51	matroska->num_levels--;
1201		51	return 0;
1202			}
1203			}
1204
1205			do {
1206		24215	res = ebml_parse(matroska, syntax, data);
1207	2/2 ✓ Branch 0 taken 16512 times. ✓ Branch 1 taken 7703 times.	24215	} while (!res);
1208
1209	2/2 ✓ Branch 0 taken 1168 times. ✓ Branch 1 taken 6535 times.	7703	return res == LEVEL_ENDED ? 0 : res;
1210			}
1211
1212		2411	static int is_ebml_id_valid(uint32_t id)
1213			{
1214			// Due to endian nonsense in Matroska, the highest byte with any bits set
1215			// will contain the leading length bit. This bit in turn identifies the
1216			// total byte length of the element by its position within the byte.
1217		2411	unsigned int bits = av_log2(id);
1218	2/4 ✓ Branch 0 taken 2411 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 2411 times. ✗ Branch 3 not taken.	2411	return id && (bits + 7) / 8 == (8 - bits % 8);
1219			}
1220
1221			/*
1222			* Allocate and return the entry for the level1 element with the given ID. If
1223			* an entry already exists, return the existing entry.
1224			*/
1225		2411	static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1226			uint32_t id, int64_t pos)
1227			{
1228			int i;
1229			MatroskaLevel1Element *elem;
1230
1231	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2411 times.	2411	if (!is_ebml_id_valid(id))
1232		✗	return NULL;
1233
1234			// Some files link to all clusters; useless.
1235	2/2 ✓ Branch 0 taken 25 times. ✓ Branch 1 taken 2386 times.	2411	if (id == MATROSKA_ID_CLUSTER)
1236		25	return NULL;
1237
1238			// There can be multiple SeekHeads and Tags.
1239	2/2 ✓ Branch 0 taken 4878 times. ✓ Branch 1 taken 1543 times.	6421	for (i = 0; i < matroska->num_level1_elems; i++) {
1240	2/2 ✓ Branch 0 taken 851 times. ✓ Branch 1 taken 4027 times.	4878	if (matroska->level1_elems[i].id == id) {
1241	3/4 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 843 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 8 times.	851	if (matroska->level1_elems[i].pos == pos ||
1242		✗	id != MATROSKA_ID_SEEKHEAD && id != MATROSKA_ID_TAGS)
1243		843	return &matroska->level1_elems[i];
1244			}
1245			}
1246
1247			// Only a completely broken file would have more elements.
1248	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1543 times.	1543	if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1249		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements.\n");
1250		✗	return NULL;
1251			}
1252
1253		1543	elem = &matroska->level1_elems[matroska->num_level1_elems++];
1254		1543	*elem = (MatroskaLevel1Element){.id = id};
1255
1256		1543	return elem;
1257			}
1258
1259		57648	static int ebml_parse(MatroskaDemuxContext *matroska,
1260			EbmlSyntax *syntax, void *data)
1261			{
1262			static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1263			// Forbid unknown-length EBML_NONE elements.
1264			[EBML_NONE] = EBML_UNKNOWN_LENGTH - 1,
1265			[EBML_UINT] = 8,
1266			[EBML_SINT] = 8,
1267			[EBML_FLOAT] = 8,
1268			// max. 16 MB for strings
1269			[EBML_STR] = 0x1000000,
1270			[EBML_UTF8] = 0x1000000,
1271			// max. 256 MB for binary data
1272			[EBML_BIN] = 0x10000000,
1273			// no limits for anything else
1274			};
1275		57648	AVIOContext *pb = matroska->ctx->pb;
1276			uint32_t id;
1277			uint64_t length;
1278		57648	int64_t pos = avio_tell(pb), pos_alt;
1279		57648	int res, update_pos = 1, level_check;
1280			MatroskaLevel1Element *level1_elem;
1281	2/2 ✓ Branch 0 taken 56910 times. ✓ Branch 1 taken 738 times.	57648	MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1282
1283	2/2 ✓ Branch 0 taken 55690 times. ✓ Branch 1 taken 1958 times.	57648	if (!matroska->current_id) {
1284			uint64_t id;
1285		55690	res = ebml_read_num(matroska, pb, 4, &id, 0);
1286	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 55676 times.	55690	if (res < 0) {
1287	2/4 ✓ Branch 0 taken 14 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 14 times. ✗ Branch 3 not taken.	14	if (pb->eof_reached && res == AVERROR_EOF) {
1288	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 10 times.	14	if (matroska->is_live)
1289			// in live mode, finish parsing if EOF is reached.
1290		14	return 1;
1291	2/4 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken. ✓ Branch 3 taken 10 times. ✗ Branch 4 not taken.	10	if (level && pos == avio_tell(pb)) {
1292	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	if (level->length == EBML_UNKNOWN_LENGTH) {
1293			// Unknown-length levels automatically end at EOF.
1294		10	matroska->num_levels--;
1295		10	return LEVEL_ENDED;
1296			} else {
1297		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1298			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1299			}
1300			}
1301			}
1302		✗	return res;
1303			}
1304		55676	matroska->current_id = id | 1 << 7 * res;
1305		55676	pos_alt = pos + res;
1306			} else {
1307		1958	pos_alt = pos;
1308		1958	pos -= (av_log2(matroska->current_id) + 7) / 8;
1309			}
1310
1311		57634	id = matroska->current_id;
1312
1313		57634	syntax = ebml_parse_id(syntax, id);
1314	6/6 ✓ Branch 0 taken 728 times. ✓ Branch 1 taken 56906 times. ✓ Branch 2 taken 505 times. ✓ Branch 3 taken 223 times. ✓ Branch 4 taken 44 times. ✓ Branch 5 taken 461 times.	57634	if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1315	3/4 ✓ Branch 0 taken 44 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✓ Branch 3 taken 37 times.	44	if (level && level->length == EBML_UNKNOWN_LENGTH) {
1316			// Unknown-length levels end when an element from an upper level
1317			// in the hierarchy is encountered.
1318	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 4 times.	7	while (syntax->def.n) {
1319		3	syntax = ebml_parse_id(syntax->def.n, id);
1320	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (syntax->id) {
1321		3	matroska->num_levels--;
1322		3	return LEVEL_ENDED;
1323			}
1324			// We have not encountered a known element; syntax is a sentinel.
1325			av_assert1(syntax->type == EBML_NONE);
1326			};
1327			}
1328
1329		41	av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1330			"%"PRId64"\n", id, pos);
1331		41	update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1332			}
1333
1334	2/2 ✓ Branch 0 taken 56496 times. ✓ Branch 1 taken 1135 times.	57631	if (data) {
1335		56496	data = (char *) data + syntax->data_offset;
1336	2/2 ✓ Branch 0 taken 3689 times. ✓ Branch 1 taken 52807 times.	56496	if (syntax->list_elem_size) {
1337		3689	EbmlList *list = data;
1338			void *newelem;
1339
1340	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3689 times.	3689	if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1341		✗	return AVERROR(ENOMEM);
1342		3689	newelem = av_fast_realloc(list->elem,
1343			&list->alloc_elem_size,
1344		3689	(list->nb_elem + 1) * syntax->list_elem_size);
1345	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3689 times.	3689	if (!newelem)
1346		✗	return AVERROR(ENOMEM);
1347		3689	list->elem = newelem;
1348		3689	data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1349		3689	memset(data, 0, syntax->list_elem_size);
1350		3689	list->nb_elem++;
1351			}
1352			}
1353
1354	2/2 ✓ Branch 0 taken 55668 times. ✓ Branch 1 taken 1963 times.	57631	if (syntax->type != EBML_STOP) {
1355		55668	matroska->current_id = 0;
1356	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 55668 times.	55668	if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1357		✗	return res;
1358
1359		55668	pos_alt += res;
1360
1361	2/2 ✓ Branch 0 taken 54930 times. ✓ Branch 1 taken 738 times.	55668	if (matroska->num_levels > 0) {
1362	2/2 ✓ Branch 0 taken 54924 times. ✓ Branch 1 taken 6 times.	54930	if (length != EBML_UNKNOWN_LENGTH &&
1363	2/2 ✓ Branch 0 taken 54814 times. ✓ Branch 1 taken 110 times.	109738	level->length != EBML_UNKNOWN_LENGTH) {
1364		54814	uint64_t elem_end = pos_alt + length,
1365		54814	level_end = level->start + level->length;
1366
1367	2/2 ✓ Branch 0 taken 47260 times. ✓ Branch 1 taken 7554 times.	54814	if (elem_end < level_end) {
1368		47260	level_check = 0;
1369	1/2 ✓ Branch 0 taken 7554 times. ✗ Branch 1 not taken.	7554	} else if (elem_end == level_end) {
1370		7554	level_check = LEVEL_ENDED;
1371			} else {
1372		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1373			"Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1374			"containing master element ending at 0x%"PRIx64"\n",
1375			pos, elem_end, level_end);
1376		✗	return AVERROR_INVALIDDATA;
1377			}
1378	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 6 times.	116	} else if (length != EBML_UNKNOWN_LENGTH) {
1379		110	level_check = 0;
1380	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	} else if (level->length != EBML_UNKNOWN_LENGTH) {
1381		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1382			"at 0x%"PRIx64" inside parent with finite size\n", pos);
1383		✗	return AVERROR_INVALIDDATA;
1384			} else {
1385		6	level_check = 0;
1386	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	6	if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1387	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	|| syntax->type == EBML_NEST)) {
1388			// According to the current specifications only clusters and
1389			// segments are allowed to be unknown-length. We also accept
1390			// other unknown-length master elements.
1391		✗	av_log(matroska->ctx, AV_LOG_WARNING,
1392			"Found unknown-length element 0x%"PRIX32" other than "
1393			"a cluster at 0x%"PRIx64". Spec-incompliant, but "
1394			"parsing will nevertheless be attempted.\n", id, pos);
1395		✗	update_pos = -1;
1396			}
1397			}
1398			} else
1399		738	level_check = 0;
1400
1401	4/4 ✓ Branch 0 taken 47587 times. ✓ Branch 1 taken 8081 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 47585 times.	55668	if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1402	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (length != EBML_UNKNOWN_LENGTH) {
1403		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1404			"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1405			"with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1406		✗	length, max_lengths[syntax->type], id, pos);
1407	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	} else if (syntax->type != EBML_NONE) {
1408		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1409			"Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1410			"unknown length, yet the length of an element of its "
1411			"type must be known.\n", id, pos);
1412			} else {
1413		2	av_log(matroska->ctx, AV_LOG_ERROR,
1414			"Found unknown-length element with ID 0x%"PRIX32" at "
1415			"pos. 0x%"PRIx64" for which no syntax for parsing is "
1416			"available.\n", id, pos);
1417			}
1418		2	return AVERROR_INVALIDDATA;
1419			}
1420
1421	2/2 ✓ Branch 0 taken 130 times. ✓ Branch 1 taken 55536 times.	55666	if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1422			// Loosing sync will likely manifest itself as encountering unknown
1423			// elements which are not reliably distinguishable from elements
1424			// belonging to future extensions of the format.
1425			// We use a heuristic to detect such situations: If the current
1426			// element is not expected at the current syntax level and there
1427			// were only a few unknown elements in a row, then the element is
1428			// skipped or considered defective based upon the length of the
1429			// current element (i.e. how much would be skipped); if there were
1430			// more than a few skipped elements in a row and skipping the current
1431			// element would lead us more than SKIP_THRESHOLD away from the last
1432			// known good position, then it is inferred that an error occurred.
1433			// The dependency on the number of unknown elements in a row exists
1434			// because the distance to the last known good position is
1435			// automatically big if the last parsed element was big.
1436			// In both cases, each unknown element is considered equivalent to
1437			// UNKNOWN_EQUIV of skipped bytes for the check.
1438			// The whole check is only done for non-seekable output, because
1439			// in this situation skipped data can't simply be rechecked later.
1440			// This is especially important when using unkown length elements
1441			// as the check for whether a child exceeds its containing master
1442			// element is not effective in this situation.
1443	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 2 times.	130	if (update_pos) {
1444		128	matroska->unknown_count = 0;
1445			} else {
1446		2	int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1447
1448	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (matroska->unknown_count > 3)
1449		✗	dist += pos_alt - matroska->resync_pos;
1450
1451	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (dist > SKIP_THRESHOLD) {
1452		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1453			"Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1454			"length 0x%"PRIx64" considered as invalid data. Last "
1455			"known good position 0x%"PRIx64", %d unknown elements"
1456			" in a row\n", id, pos, length, matroska->resync_pos,
1457			matroska->unknown_count);
1458		✗	return AVERROR_INVALIDDATA;
1459			}
1460			}
1461			}
1462
1463	2/2 ✓ Branch 0 taken 55627 times. ✓ Branch 1 taken 39 times.	55666	if (update_pos > 0) {
1464			// We have found an element that is allowed at this place
1465			// in the hierarchy and it passed all checks, so treat the beginning
1466			// of the element as the "last known good" position.
1467		55627	matroska->resync_pos = pos;
1468			}
1469
1470	3/4 ✓ Branch 0 taken 334 times. ✓ Branch 1 taken 55332 times. ✓ Branch 2 taken 334 times. ✗ Branch 3 not taken.	55666	if (!data && length != EBML_UNKNOWN_LENGTH)
1471		334	goto skip;
1472			}
1473
1474	8/8 ✓ Branch 0 taken 10622 times. ✓ Branch 1 taken 160 times. ✓ Branch 2 taken 745 times. ✓ Branch 3 taken 2325 times. ✓ Branch 4 taken 31040 times. ✓ Branch 5 taken 7754 times. ✓ Branch 6 taken 1963 times. ✓ Branch 7 taken 2686 times.	57295	switch (syntax->type) {
1475		10622	case EBML_UINT:
1476		10622	res = ebml_read_uint(pb, length, syntax->def.u, data);
1477		10622	break;
1478		160	case EBML_SINT:
1479		160	res = ebml_read_sint(pb, length, syntax->def.i, data);
1480		160	break;
1481		745	case EBML_FLOAT:
1482		745	res = ebml_read_float(pb, length, syntax->def.f, data);
1483		745	break;
1484		2325	case EBML_STR:
1485			case EBML_UTF8:
1486		2325	res = ebml_read_ascii(pb, length, syntax->def.s, data);
1487		2325	break;
1488		31040	case EBML_BIN:
1489		31040	res = ebml_read_binary(pb, length, pos_alt, data);
1490		31040	break;
1491		7754	case EBML_LEVEL1:
1492			case EBML_NEST:
1493	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7754 times.	7754	if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1494		✗	return res;
1495	2/2 ✓ Branch 0 taken 369 times. ✓ Branch 1 taken 7385 times.	7754	if (id == MATROSKA_ID_SEGMENT)
1496		369	matroska->segment_start = pos_alt;
1497	2/2 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 7734 times.	7754	if (id == MATROSKA_ID_CUES)
1498		20	matroska->cues_parsing_deferred = 0;
1499	3/4 ✓ Branch 0 taken 1227 times. ✓ Branch 1 taken 6527 times. ✓ Branch 2 taken 1227 times. ✗ Branch 3 not taken.	8981	if (syntax->type == EBML_LEVEL1 &&
1500		1227	(level1_elem = matroska_find_level1_elem(matroska, syntax->id, pos))) {
1501	2/2 ✓ Branch 0 taken 1205 times. ✓ Branch 1 taken 22 times.	1227	if (!level1_elem->pos) {
1502			// Zero is not a valid position for a level 1 element.
1503		1205	level1_elem->pos = pos;
1504	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 22 times.	22	} else if (level1_elem->pos != pos)
1505		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1506		1227	level1_elem->parsed = 1;
1507			}
1508	2/2 ✓ Branch 1 taken 1168 times. ✓ Branch 2 taken 6586 times.	7754	if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1509		1168	return res;
1510		6586	break;
1511		1963	case EBML_STOP:
1512		1963	return 1;
1513		334	skip:
1514		3020	default:
1515	2/2 ✓ Branch 0 taken 3018 times. ✓ Branch 1 taken 2 times.	3020	if (length) {
1516			int64_t res2;
1517	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3018 times.	3018	if (ffio_limit(pb, length) != length) {
1518			// ffio_limit emits its own error message,
1519			// so we don't have to.
1520		✗	return AVERROR(EIO);
1521			}
1522	1/2 ✓ Branch 1 taken 3018 times. ✗ Branch 2 not taken.	3018	if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1523			// avio_skip might take us past EOF. We check for this
1524			// by skipping only length - 1 bytes, reading a byte and
1525			// checking the error flags. This is done in order to check
1526			// that the element has been properly skipped even when
1527			// no filesize (that ffio_limit relies on) is available.
1528		3018	avio_r8(pb);
1529		3018	res = NEEDS_CHECKING;
1530			} else
1531		✗	res = res2;
1532			} else
1533		2	res = 0;
1534			}
1535	2/2 ✓ Branch 0 taken 14555 times. ✓ Branch 1 taken 39943 times.	54498	if (res) {
1536	1/2 ✓ Branch 0 taken 14555 times. ✗ Branch 1 not taken.	14555	if (res == NEEDS_CHECKING) {
1537	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 14545 times.	14555	if (pb->eof_reached) {
1538	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (pb->error)
1539		✗	res = pb->error;
1540			else
1541		10	res = AVERROR_EOF;
1542			} else
1543		14545	goto level_check;
1544			}
1545
1546	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (res == AVERROR_INVALIDDATA)
1547		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1548	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	else if (res == AVERROR(EIO))
1549		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1550	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	else if (res == AVERROR_EOF) {
1551		10	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1552		10	res = AVERROR(EIO);
1553			}
1554
1555		10	return res;
1556			}
1557
1558		39943	level_check:
1559	3/4 ✓ Branch 0 taken 144 times. ✓ Branch 1 taken 54344 times. ✓ Branch 2 taken 144 times. ✗ Branch 3 not taken.	54488	if (syntax->is_counted && data) {
1560		144	CountedElement *elem = data;
1561	1/2 ✓ Branch 0 taken 144 times. ✗ Branch 1 not taken.	144	if (elem->count != UINT_MAX)
1562		144	elem->count++;
1563			}
1564
1565	4/4 ✓ Branch 0 taken 7489 times. ✓ Branch 1 taken 46999 times. ✓ Branch 2 taken 7459 times. ✓ Branch 3 taken 30 times.	54488	if (level_check == LEVEL_ENDED && matroska->num_levels) {
1566		7459	level = &matroska->levels[matroska->num_levels - 1];
1567		7459	pos = avio_tell(pb);
1568
1569			// Given that pos >= level->start no check for
1570			// level->length != EBML_UNKNOWN_LENGTH is necessary.
1571	4/4 ✓ Branch 0 taken 14271 times. ✓ Branch 1 taken 725 times. ✓ Branch 2 taken 7537 times. ✓ Branch 3 taken 6734 times.	14996	while (matroska->num_levels && pos == level->start + level->length) {
1572		7537	matroska->num_levels--;
1573		7537	level--;
1574			}
1575			}
1576
1577		54488	return level_check;
1578			}
1579
1580		72143	static void ebml_free(EbmlSyntax *syntax, void *data)
1581			{
1582			int i, j;
1583	2/2 ✓ Branch 0 taken 298793 times. ✓ Branch 1 taken 72143 times.	370936	for (i = 0; syntax[i].id; i++) {
1584		298793	void *data_off = (char *) data + syntax[i].data_offset;
1585	4/4 ✓ Branch 0 taken 3958 times. ✓ Branch 1 taken 32589 times. ✓ Branch 2 taken 72863 times. ✓ Branch 3 taken 189383 times.	298793	switch (syntax[i].type) {
1586		3958	case EBML_STR:
1587			case EBML_UTF8:
1588		3958	av_freep(data_off);
1589		3958	break;
1590		32589	case EBML_BIN:
1591		32589	av_buffer_unref(&((EbmlBin *) data_off)->buf);
1592		32589	break;
1593		72863	case EBML_LEVEL1:
1594			case EBML_NEST:
1595	2/2 ✓ Branch 0 taken 35877 times. ✓ Branch 1 taken 36986 times.	72863	if (syntax[i].list_elem_size) {
1596		35877	EbmlList *list = data_off;
1597		35877	char *ptr = list->elem;
1598	2/2 ✓ Branch 0 taken 3689 times. ✓ Branch 1 taken 35877 times.	39566	for (j = 0; j < list->nb_elem;
1599		3689	j++, ptr += syntax[i].list_elem_size)
1600		3689	ebml_free(syntax[i].def.n, ptr);
1601		35877	av_freep(&list->elem);
1602		35877	list->nb_elem = 0;
1603		35877	list->alloc_elem_size = 0;
1604			} else
1605		36986	ebml_free(syntax[i].def.n, data_off);
1606			default:
1607		262246	break;
1608			}
1609			}
1610		72143	}
1611
1612			/*
1613			* Autodetecting...
1614			*/
1615		7186	static int matroska_probe(const AVProbeData *p)
1616			{
1617		7186	uint64_t total = 0;
1618		7186	int len_mask = 0x80, size = 1, n = 1, i;
1619
1620			/* EBML header? */
1621	2/2 ✓ Branch 0 taken 6839 times. ✓ Branch 1 taken 347 times.	7186	if (AV_RB32(p->buf) != EBML_ID_HEADER)
1622		6839	return 0;
1623
1624			/* length of header */
1625		347	total = p->buf[4];
1626	3/4 ✓ Branch 0 taken 2083 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 1736 times. ✓ Branch 3 taken 347 times.	2083	while (size <= 8 && !(total & len_mask)) {
1627		1736	size++;
1628		1736	len_mask >>= 1;
1629			}
1630	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 347 times.	347	if (size > 8)
1631		✗	return 0;
1632		347	total &= (len_mask - 1);
1633	2/2 ✓ Branch 0 taken 1736 times. ✓ Branch 1 taken 347 times.	2083	while (n < size)
1634		1736	total = (total << 8) | p->buf[4 + n++];
1635
1636	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 347 times.	347	if (total + 1 == 1ULL << (7 * size)){
1637			/* Unknown-length header - simply parse the whole buffer. */
1638		✗	total = p->buf_size - 4 - size;
1639			} else {
1640			/* Does the probe data contain the whole header? */
1641	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 347 times.	347	if (p->buf_size < 4 + size + total)
1642		✗	return 0;
1643			}
1644
1645			/* The header should contain a known document type. For now,
1646			* we don't parse the whole header but simply check for the
1647			* availability of that array of characters inside the header.
1648			* Not fully fool-proof, but good enough. */
1649	1/2 ✓ Branch 0 taken 598 times. ✗ Branch 1 not taken.	598	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1650		598	size_t probelen = strlen(matroska_doctypes[i]);
1651	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 598 times.	598	if (total < probelen)
1652		✗	continue;
1653	2/2 ✓ Branch 0 taken 12922 times. ✓ Branch 1 taken 251 times.	13173	for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1654	2/2 ✓ Branch 0 taken 347 times. ✓ Branch 1 taken 12575 times.	12922	if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1655		347	return AVPROBE_SCORE_MAX;
1656			}
1657
1658			// probably valid EBML header but no recognized doctype
1659		✗	return AVPROBE_SCORE_EXTENSION;
1660			}
1661
1662		31371	static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1663			uint64_t num)
1664			{
1665		31371	MatroskaTrack *tracks = matroska->tracks.elem;
1666			int i;
1667
1668	2/2 ✓ Branch 0 taken 34480 times. ✓ Branch 1 taken 1 times.	34481	for (i = 0; i < matroska->tracks.nb_elem; i++)
1669	2/2 ✓ Branch 0 taken 31370 times. ✓ Branch 1 taken 3110 times.	34480	if (tracks[i].num == num)
1670		31370	return &tracks[i];
1671
1672		1	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1673		1	return NULL;
1674			}
1675
1676		82	static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1677			MatroskaTrack *track)
1678			{
1679		82	MatroskaTrackEncoding *encodings = track->encodings.elem;
1680		82	uint8_t *data = *buf;
1681		82	int isize = *buf_size;
1682		82	uint8_t *pkt_data = NULL;
1683			uint8_t av_unused *newpktdata;
1684		82	int pkt_size = isize;
1685		82	int result = 0;
1686			int olen;
1687
1688	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 82 times.	82	if (pkt_size >= 10000000U)
1689		✗	return AVERROR_INVALIDDATA;
1690
1691	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) {
1692		70	case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1693			{
1694		70	int header_size = encodings[0].compression.settings.size;
1695		70	uint8_t *header = encodings[0].compression.settings.data;
1696
1697	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) {
1698		✗	av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1699		✗	return -1;
1700			}
1701
1702	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!header_size)
1703		✗	return 0;
1704
1705		70	pkt_size = isize + header_size;
1706		70	pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1707	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!pkt_data)
1708		✗	return AVERROR(ENOMEM);
1709
1710		70	memcpy(pkt_data, header, header_size);
1711		70	memcpy(pkt_data + header_size, data, isize);
1712		70	break;
1713			}
1714		15	case MATROSKA_TRACK_ENCODING_COMP_LZO:
1715			do {
1716		15	int insize = isize;
1717		15	olen = pkt_size *= 3;
1718		15	newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1719		15	+ AV_INPUT_BUFFER_PADDING_SIZE);
1720	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 15 times.	15	if (!newpktdata) {
1721		✗	result = AVERROR(ENOMEM);
1722		✗	goto failed;
1723			}
1724		15	pkt_data = newpktdata;
1725		15	result = av_lzo1x_decode(pkt_data, &olen, data, &insize);
1726	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);
1727	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (result) {
1728		✗	result = AVERROR_INVALIDDATA;
1729		✗	goto failed;
1730			}
1731		4	pkt_size -= olen;
1732		4	break;
1733			#if CONFIG_ZLIB
1734		6	case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1735			{
1736		6	z_stream zstream = { 0 };
1737	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)
1738		✗	return -1;
1739		6	zstream.next_in = data;
1740		6	zstream.avail_in = isize;
1741			do {
1742		8	pkt_size *= 3;
1743		8	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1744	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (!newpktdata) {
1745		✗	inflateEnd(&zstream);
1746		✗	result = AVERROR(ENOMEM);
1747		✗	goto failed;
1748			}
1749		8	pkt_data = newpktdata;
1750		8	zstream.avail_out = pkt_size - zstream.total_out;
1751		8	zstream.next_out = pkt_data + zstream.total_out;
1752		8	result = inflate(&zstream, Z_NO_FLUSH);
1753	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);
1754		6	pkt_size = zstream.total_out;
1755		6	inflateEnd(&zstream);
1756	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (result != Z_STREAM_END) {
1757		✗	if (result == Z_MEM_ERROR)
1758		✗	result = AVERROR(ENOMEM);
1759			else
1760		✗	result = AVERROR_INVALIDDATA;
1761		✗	goto failed;
1762			}
1763		6	break;
1764			}
1765			#endif
1766			#if CONFIG_BZLIB
1767		2	case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1768			{
1769		2	bz_stream bzstream = { 0 };
1770	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)
1771		✗	return -1;
1772		2	bzstream.next_in = data;
1773		2	bzstream.avail_in = isize;
1774			do {
1775		6	pkt_size *= 3;
1776		6	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1777	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!newpktdata) {
1778		✗	BZ2_bzDecompressEnd(&bzstream);
1779		✗	result = AVERROR(ENOMEM);
1780		✗	goto failed;
1781			}
1782		6	pkt_data = newpktdata;
1783		6	bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1784		6	bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1785		6	result = BZ2_bzDecompress(&bzstream);
1786	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);
1787		2	pkt_size = bzstream.total_out_lo32;
1788		2	BZ2_bzDecompressEnd(&bzstream);
1789	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (result != BZ_STREAM_END) {
1790		✗	if (result == BZ_MEM_ERROR)
1791		✗	result = AVERROR(ENOMEM);
1792			else
1793		✗	result = AVERROR_INVALIDDATA;
1794		✗	goto failed;
1795			}
1796		2	break;
1797			}
1798			#endif
1799		✗	default:
1800		✗	return AVERROR_INVALIDDATA;
1801			}
1802
1803		82	memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1804
1805		82	*buf = pkt_data;
1806		82	*buf_size = pkt_size;
1807		82	return 0;
1808
1809		✗	failed:
1810		✗	av_free(pkt_data);
1811		✗	return result;
1812			}
1813
1814		200	static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1815			AVDictionary **metadata, char *prefix)
1816			{
1817		200	MatroskaTag *tags = list->elem;
1818			char key[1024];
1819			int i;
1820
1821	2/2 ✓ Branch 0 taken 433 times. ✓ Branch 1 taken 200 times.	633	for (i = 0; i < list->nb_elem; i++) {
1822		1299	const char *lang = tags[i].lang &&
1823	3/4 ✓ Branch 0 taken 433 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 45 times. ✓ Branch 3 taken 388 times.	433	strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1824
1825	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 433 times.	433	if (!tags[i].name) {
1826		✗	av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1827		✗	continue;
1828			}
1829	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 433 times.	433	if (prefix)
1830		✗	snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1831			else
1832		433	av_strlcpy(key, tags[i].name, sizeof(key));
1833	3/4 ✓ Branch 0 taken 433 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 388 times. ✓ Branch 3 taken 45 times.	433	if (tags[i].def || !lang) {
1834		388	av_dict_set(metadata, key, tags[i].string, 0);
1835	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 388 times.	388	if (tags[i].sub.nb_elem)
1836		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1837			}
1838	2/2 ✓ Branch 0 taken 45 times. ✓ Branch 1 taken 388 times.	433	if (lang) {
1839		45	av_strlcat(key, "-", sizeof(key));
1840		45	av_strlcat(key, lang, sizeof(key));
1841		45	av_dict_set(metadata, key, tags[i].string, 0);
1842	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (tags[i].sub.nb_elem)
1843		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1844			}
1845			}
1846		200	ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1847		200	}
1848
1849		369	static void matroska_convert_tags(AVFormatContext *s)
1850			{
1851		369	MatroskaDemuxContext *matroska = s->priv_data;
1852		369	MatroskaTags *tags = matroska->tags.elem;
1853			int i, j;
1854
1855	2/2 ✓ Branch 0 taken 200 times. ✓ Branch 1 taken 369 times.	569	for (i = 0; i < matroska->tags.nb_elem; i++) {
1856	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 197 times.	200	if (tags[i].target.attachuid) {
1857		3	MatroskaAttachment *attachment = matroska->attachments.elem;
1858		3	int found = 0;
1859	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	for (j = 0; j < matroska->attachments.nb_elem; j++) {
1860	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (attachment[j].uid == tags[i].target.attachuid &&
1861	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	attachment[j].stream) {
1862		3	matroska_convert_tag(s, &tags[i].tag,
1863		3	&attachment[j].stream->metadata, NULL);
1864		3	found = 1;
1865			}
1866			}
1867	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1868		✗	av_log(s, AV_LOG_WARNING,
1869			"The tags at index %d refer to a "
1870			"non-existent attachment %"PRId64".\n",
1871		✗	i, tags[i].target.attachuid);
1872			}
1873	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 194 times.	197	} else if (tags[i].target.chapteruid) {
1874		3	MatroskaChapter *chapter = matroska->chapters.elem;
1875		3	int found = 0;
1876	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 3 times.	9	for (j = 0; j < matroska->chapters.nb_elem; j++) {
1877	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	if (chapter[j].uid == tags[i].target.chapteruid &&
1878	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	chapter[j].chapter) {
1879		3	matroska_convert_tag(s, &tags[i].tag,
1880		3	&chapter[j].chapter->metadata, NULL);
1881		3	found = 1;
1882			}
1883			}
1884	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1885		✗	av_log(s, AV_LOG_WARNING,
1886			"The tags at index %d refer to a non-existent chapter "
1887			"%"PRId64".\n",
1888		✗	i, tags[i].target.chapteruid);
1889			}
1890	2/2 ✓ Branch 0 taken 143 times. ✓ Branch 1 taken 51 times.	194	} else if (tags[i].target.trackuid) {
1891		143	MatroskaTrack *track = matroska->tracks.elem;
1892		143	int found = 0;
1893	2/2 ✓ Branch 0 taken 379 times. ✓ Branch 1 taken 143 times.	522	for (j = 0; j < matroska->tracks.nb_elem; j++) {
1894	2/2 ✓ Branch 0 taken 143 times. ✓ Branch 1 taken 236 times.	379	if (track[j].uid == tags[i].target.trackuid &&
1895	1/2 ✓ Branch 0 taken 143 times. ✗ Branch 1 not taken.	143	track[j].stream) {
1896		143	matroska_convert_tag(s, &tags[i].tag,
1897		143	&track[j].stream->metadata, NULL);
1898		143	found = 1;
1899			}
1900			}
1901	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 143 times.	143	if (!found) {
1902		✗	av_log(s, AV_LOG_WARNING,
1903			"The tags at index %d refer to a non-existent track "
1904			"%"PRId64".\n",
1905		✗	i, tags[i].target.trackuid);
1906			}
1907			} else {
1908		51	matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1909		51	tags[i].target.type);
1910			}
1911			}
1912		369	}
1913
1914		24	static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1915			int64_t pos)
1916			{
1917		24	uint32_t saved_id = matroska->current_id;
1918		24	int64_t before_pos = avio_tell(matroska->ctx->pb);
1919		24	int ret = 0;
1920			int ret2;
1921
1922			/* seek */
1923	1/2 ✓ Branch 1 taken 24 times. ✗ Branch 2 not taken.	24	if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1924			/* We don't want to lose our seekhead level, so we add
1925			* a dummy. This is a crude hack. */
1926	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (matroska->num_levels == EBML_MAX_DEPTH) {
1927		✗	av_log(matroska->ctx, AV_LOG_INFO,
1928			"Max EBML element depth (%d) reached, "
1929			"cannot parse further.\n", EBML_MAX_DEPTH);
1930		✗	ret = AVERROR_INVALIDDATA;
1931			} else {
1932		24	matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1933		24	matroska->num_levels++;
1934		24	matroska->current_id = 0;
1935
1936		24	ret = ebml_parse(matroska, matroska_segment, matroska);
1937	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (ret == LEVEL_ENDED) {
1938			/* This can only happen if the seek brought us beyond EOF. */
1939		2	ret = AVERROR_EOF;
1940			}
1941			}
1942			}
1943			/* Seek back - notice that in all instances where this is used
1944			* it is safe to set the level to 1. */
1945		24	ret2 = matroska_reset_status(matroska, saved_id, before_pos);
1946	2/2 ✓ Branch 0 taken 22 times. ✓ Branch 1 taken 2 times.	24	if (ret >= 0)
1947		22	ret = ret2;
1948
1949		24	return ret;
1950			}
1951
1952		369	static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1953			{
1954		369	EbmlList *seekhead_list = &matroska->seekhead;
1955			int i;
1956
1957			// we should not do any seeking in the streaming case
1958	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 368 times.	369	if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1959		1	return;
1960
1961	2/2 ✓ Branch 0 taken 1184 times. ✓ Branch 1 taken 367 times.	1551	for (i = 0; i < seekhead_list->nb_elem; i++) {
1962		1184	MatroskaSeekhead *seekheads = seekhead_list->elem;
1963		1184	uint32_t id = seekheads[i].id;
1964		1184	int64_t pos = seekheads[i].pos + matroska->segment_start;
1965			MatroskaLevel1Element *elem;
1966
1967	2/4 ✓ Branch 0 taken 1184 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 1184 times.	1184	if (id != seekheads[i].id || pos < matroska->segment_start)
1968		✗	continue;
1969
1970		1184	elem = matroska_find_level1_elem(matroska, id, pos);
1971	4/4 ✓ Branch 0 taken 1159 times. ✓ Branch 1 taken 25 times. ✓ Branch 2 taken 821 times. ✓ Branch 3 taken 338 times.	1184	if (!elem || elem->parsed)
1972		846	continue;
1973
1974		338	elem->pos = pos;
1975
1976			// defer cues parsing until we actually need cue data.
1977	2/2 ✓ Branch 0 taken 326 times. ✓ Branch 1 taken 12 times.	338	if (id == MATROSKA_ID_CUES)
1978		326	continue;
1979
1980	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1981			// mark index as broken
1982		1	matroska->cues_parsing_deferred = -1;
1983		1	break;
1984			}
1985
1986		11	elem->parsed = 1;
1987			}
1988			}
1989
1990		382	static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1991			{
1992			EbmlList *index_list;
1993			MatroskaIndex *index;
1994		382	uint64_t index_scale = 1;
1995			int i, j;
1996
1997	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 382 times.	382	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1998		✗	return;
1999
2000		382	index_list = &matroska->index;
2001		382	index = index_list->elem;
2002	2/2 ✓ Branch 0 taken 364 times. ✓ Branch 1 taken 18 times.	382	if (index_list->nb_elem < 2)
2003		364	return;
2004	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 18 times.	18	if (index[1].time > 1E14 / matroska->time_scale) {
2005		✗	av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
2006		✗	return;
2007			}
2008	2/2 ✓ Branch 0 taken 538 times. ✓ Branch 1 taken 18 times.	556	for (i = 0; i < index_list->nb_elem; i++) {
2009		538	EbmlList *pos_list = &index[i].pos;
2010		538	MatroskaIndexPos *pos = pos_list->elem;
2011	2/2 ✓ Branch 0 taken 656 times. ✓ Branch 1 taken 538 times.	1194	for (j = 0; j < pos_list->nb_elem; j++) {
2012		656	MatroskaTrack *track = matroska_find_track_by_num(matroska,
2013		656	pos[j].track);
2014	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)
2015		656	av_add_index_entry(track->stream,
2016		656	pos[j].pos + matroska->segment_start,
2017		656	index[i].time / index_scale, 0, 0,
2018			AVINDEX_KEYFRAME);
2019			}
2020			}
2021			}
2022
2023		13	static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
2024			int i;
2025
2026	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 13 times.	13	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
2027		✗	return;
2028
2029	2/2 ✓ Branch 0 taken 53 times. ✓ Branch 1 taken 1 times.	54	for (i = 0; i < matroska->num_level1_elems; i++) {
2030		53	MatroskaLevel1Element *elem = &matroska->level1_elems[i];
2031	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) {
2032	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
2033		1	matroska->cues_parsing_deferred = -1;
2034		12	elem->parsed = 1;
2035		12	break;
2036			}
2037			}
2038
2039		13	matroska_add_index_entries(matroska);
2040			}
2041
2042		440	static int matroska_parse_content_encodings(MatroskaTrackEncoding *encodings,
2043			unsigned nb_encodings,
2044			MatroskaTrack *track,
2045			char **key_id_base64, void *logctx)
2046			{
2047	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (nb_encodings > 1) {
2048		✗	av_log(logctx, AV_LOG_ERROR,
2049			"Multiple combined encodings not supported\n");
2050		✗	return 0;
2051			}
2052	2/2 ✓ Branch 0 taken 428 times. ✓ Branch 1 taken 12 times.	440	if (!nb_encodings)
2053		428	return 0;
2054	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (encodings->type) {
2055		✗	if (encodings->encryption.key_id.size > 0) {
2056			/* Save the encryption key id to be stored later
2057			* as a metadata tag. */
2058		✗	const int b64_size = AV_BASE64_SIZE(encodings->encryption.key_id.size);
2059		✗	*key_id_base64 = av_malloc(b64_size);
2060		✗	if (!*key_id_base64)
2061		✗	return AVERROR(ENOMEM);
2062
2063		✗	av_base64_encode(*key_id_base64, b64_size,
2064		✗	encodings->encryption.key_id.data,
2065			encodings->encryption.key_id.size);
2066			} else {
2067		✗	encodings->scope = 0;
2068		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2069			}
2070		12	} else if (
2071			#if CONFIG_ZLIB
2072	2/2 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 3 times.	12	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2073			#endif
2074			#if CONFIG_BZLIB
2075	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 1 times.	9	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2076			#endif
2077	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 1 times.	8	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2078	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2079		✗	encodings->scope = 0;
2080		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2081	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) {
2082		1	uint8_t *codec_priv = track->codec_priv.data;
2083		1	int ret = matroska_decode_buffer(&track->codec_priv.data,
2084			&track->codec_priv.size,
2085			track);
2086	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0) {
2087		✗	track->codec_priv.data = NULL;
2088		✗	track->codec_priv.size = 0;
2089		✗	av_log(logctx, AV_LOG_ERROR,
2090			"Failed to decode codec private data\n");
2091			}
2092
2093	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (codec_priv != track->codec_priv.data) {
2094		1	av_buffer_unref(&track->codec_priv.buf);
2095	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.data) {
2096		2	track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2097		1	track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2098			NULL, NULL, 0);
2099	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (!track->codec_priv.buf) {
2100		✗	av_freep(&track->codec_priv.data);
2101		✗	track->codec_priv.size = 0;
2102		✗	return AVERROR(ENOMEM);
2103			}
2104			}
2105			}
2106			}
2107		36	track->needs_decoding = !encodings->type &&
2108	2/4 ✓ Branch 0 taken 12 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken.	24	encodings->scope & 1 &&
2109	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 5 times.	12	(encodings->compression.algo !=
2110		7	MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP ||
2111	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	encodings->compression.settings.size);
2112
2113		12	return 0;
2114			}
2115
2116		✗	static int matroska_aac_profile(char *codec_id)
2117			{
2118			static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
2119			int profile;
2120
2121		✗	for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
2122		✗	if (strstr(codec_id, aac_profiles[profile]))
2123		✗	break;
2124		✗	return profile + 1;
2125			}
2126
2127		✗	static int matroska_aac_sri(int samplerate)
2128			{
2129			int sri;
2130
2131		✗	for (sri = 0; sri < FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
2132		✗	if (ff_mpeg4audio_sample_rates[sri] == samplerate)
2133		✗	break;
2134		✗	return sri;
2135			}
2136
2137		18	static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
2138			{
2139			/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
2140		18	avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
2141		18	}
2142
2143		9	static int matroska_parse_flac(AVFormatContext *s,
2144			MatroskaTrack *track,
2145			int *offset)
2146			{
2147		9	AVStream *st = track->stream;
2148		9	uint8_t *p = track->codec_priv.data;
2149		9	int size = track->codec_priv.size;
2150
2151	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) {
2152		✗	av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
2153		✗	track->codec_priv.size = 0;
2154		✗	return 0;
2155			}
2156		9	*offset = 8;
2157		9	track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
2158
2159		9	p += track->codec_priv.size;
2160		9	size -= track->codec_priv.size;
2161
2162			/* parse the remaining metadata blocks if present */
2163	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 9 times.	17	while (size >= 4) {
2164			int block_last, block_type, block_size;
2165
2166		8	flac_parse_block_header(p, &block_last, &block_type, &block_size);
2167
2168		8	p += 4;
2169		8	size -= 4;
2170	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (block_size > size)
2171		✗	return 0;
2172
2173			/* check for the channel mask */
2174	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
2175		8	AVDictionary *dict = NULL;
2176			AVDictionaryEntry *chmask;
2177
2178		8	ff_vorbis_comment(s, &dict, p, block_size, 0);
2179		8	chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2180	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (chmask) {
2181		8	uint64_t mask = strtol(chmask->value, NULL, 0);
2182	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) {
2183		✗	av_log(s, AV_LOG_WARNING,
2184			"Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2185			} else
2186		8	av_channel_layout_from_mask(&st->codecpar->ch_layout, mask);
2187			}
2188		8	av_dict_free(&dict);
2189			}
2190
2191		8	p += block_size;
2192		8	size -= block_size;
2193			}
2194
2195		9	return 0;
2196			}
2197
2198		7	static int mkv_field_order(const MatroskaDemuxContext *matroska, uint64_t field_order)
2199			{
2200		7	int minor, micro, bttb = 0;
2201
2202			/* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2203			* this function, and fixed in 57.52 */
2204	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)
2205		✗	bttb = (minor >= 36 && minor <= 51 && micro >= 100);
2206
2207	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) {
2208		✗	case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
2209		✗	return AV_FIELD_PROGRESSIVE;
2210		✗	case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
2211		✗	return AV_FIELD_UNKNOWN;
2212		6	case MATROSKA_VIDEO_FIELDORDER_TT:
2213		6	return AV_FIELD_TT;
2214		1	case MATROSKA_VIDEO_FIELDORDER_BB:
2215		1	return AV_FIELD_BB;
2216		✗	case MATROSKA_VIDEO_FIELDORDER_BT:
2217		✗	return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2218		✗	case MATROSKA_VIDEO_FIELDORDER_TB:
2219		✗	return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2220		✗	default:
2221		✗	return AV_FIELD_UNKNOWN;
2222			}
2223			}
2224
2225		12	static void mkv_stereo_mode_display_mul(int stereo_mode,
2226			int *h_width, int *h_height)
2227			{
2228	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) {
2229		✗	case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
2230			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
2231			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
2232			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
2233			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
2234		✗	break;
2235		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
2236			case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
2237			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
2238			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
2239		4	*h_width = 2;
2240		4	break;
2241		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
2242			case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
2243			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
2244			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
2245		4	*h_height = 2;
2246		4	break;
2247			}
2248		12	}
2249
2250		236	static int mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
2251			{
2252			static const struct {
2253			char type;
2254			char flags;
2255			} stereo_mode_conv [] = {
2256			#define STEREO_MODE_CONV(STEREOMODETYPE, STEREO3DTYPE, FLAGS, WDIV, HDIV, WEBM) \
2257			[(STEREOMODETYPE)] = { .type = (STEREO3DTYPE), .flags = (FLAGS) },
2258			#define NOTHING(STEREOMODETYPE, WDIV, HDIV, WEBM)
2259			STEREOMODE_STEREO3D_MAPPING(STEREO_MODE_CONV, NOTHING)
2260			};
2261			AVStereo3D *stereo;
2262			size_t size;
2263
2264		236	stereo = av_stereo3d_alloc_size(&size);
2265	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (!stereo)
2266		✗	return AVERROR(ENOMEM);
2267
2268		236	stereo->type = stereo_mode_conv[stereo_mode].type;
2269		236	stereo->flags = stereo_mode_conv[stereo_mode].flags;
2270
2271	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,
2272			AV_PKT_DATA_STEREO3D, stereo, size, 0)) {
2273		✗	av_freep(&stereo);
2274		✗	return AVERROR(ENOMEM);
2275			}
2276
2277		236	return 0;
2278			}
2279
2280		332	static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2281		332	const MatroskaTrackVideoColor *color = track->video.color.elem;
2282			const MatroskaMasteringMeta *mastering_meta;
2283			int has_mastering_primaries, has_mastering_luminance;
2284
2285	2/2 ✓ Branch 0 taken 275 times. ✓ Branch 1 taken 57 times.	332	if (!track->video.color.nb_elem)
2286		275	return 0;
2287
2288		57	mastering_meta = &color->mastering_meta;
2289			// Mastering primaries are CIE 1931 coords, and must be > 0.
2290		57	has_mastering_primaries =
2291	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->r_x > 0 && mastering_meta->r_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->g_x > 0 && mastering_meta->g_y > 0 &&
2293	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	7	mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2294	4/6 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 50 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 7 times. ✗ Branch 5 not taken.	64	mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2295		114	has_mastering_luminance = mastering_meta->max_luminance >
2296		64	mastering_meta->min_luminance.el.f &&
2297	3/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 50 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	64	mastering_meta->min_luminance.el.f >= 0 &&
2298	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->min_luminance.count;
2299
2300	1/2 ✓ Branch 0 taken 57 times. ✗ Branch 1 not taken.	57	if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2301		57	st->codecpar->color_space = color->matrix_coefficients;
2302	1/2 ✓ Branch 0 taken 57 times. ✗ Branch 1 not taken.	57	if (color->primaries != AVCOL_PRI_RESERVED &&
2303	2/2 ✓ Branch 0 taken 55 times. ✓ Branch 1 taken 2 times.	57	color->primaries != AVCOL_PRI_RESERVED0)
2304		55	st->codecpar->color_primaries = color->primaries;
2305	1/2 ✓ Branch 0 taken 57 times. ✗ Branch 1 not taken.	57	if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2306	2/2 ✓ Branch 0 taken 55 times. ✓ Branch 1 taken 2 times.	57	color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2307		55	st->codecpar->color_trc = color->transfer_characteristics;
2308	2/2 ✓ Branch 0 taken 37 times. ✓ Branch 1 taken 20 times.	57	if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2309	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->range <= AVCOL_RANGE_JPEG)
2310		37	st->codecpar->color_range = color->range;
2311	2/2 ✓ Branch 0 taken 37 times. ✓ Branch 1 taken 20 times.	57	if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2312	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2313	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2314	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2315		37	st->codecpar->chroma_location =
2316		37	av_chroma_location_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2317		37	(color->chroma_siting_vert - 1) << 7);
2318			}
2319	3/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 50 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	57	if (color->max_cll && color->max_fall) {
2320		7	size_t size = 0;
2321		7	AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
2322	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2323		✗	return AVERROR(ENOMEM);
2324	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,
2325			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, metadata, size, 0)) {
2326		✗	av_freep(&metadata);
2327		✗	return AVERROR(ENOMEM);
2328			}
2329		7	metadata->MaxCLL = color->max_cll;
2330		7	metadata->MaxFALL = color->max_fall;
2331			}
2332
2333	3/4 ✓ Branch 0 taken 50 times. ✓ Branch 1 taken 7 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 50 times.	57	if (has_mastering_primaries || has_mastering_luminance) {
2334		7	size_t size = 0;
2335		7	AVMasteringDisplayMetadata *metadata = av_mastering_display_metadata_alloc_size(&size);
2336	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2337		✗	return AVERROR(ENOMEM);
2338	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,
2339			AV_PKT_DATA_MASTERING_DISPLAY_METADATA, metadata, size, 0)) {
2340		✗	av_freep(&metadata);
2341		✗	return AVERROR(ENOMEM);
2342			}
2343	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_primaries) {
2344		7	metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
2345		7	metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
2346		7	metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
2347		7	metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
2348		7	metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
2349		7	metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
2350		7	metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
2351		7	metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
2352		7	metadata->has_primaries = 1;
2353			}
2354	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_luminance) {
2355		7	metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
2356		7	metadata->min_luminance = av_d2q(mastering_meta->min_luminance.el.f, INT_MAX);
2357		7	metadata->has_luminance = 1;
2358			}
2359			}
2360		57	return 0;
2361			}
2362
2363		326	static int mkv_create_display_matrix(AVStream *st,
2364			const MatroskaTrackVideoProjection *proj,
2365			void *logctx)
2366			{
2367			AVPacketSideData *sd;
2368		326	double pitch = proj->pitch, yaw = proj->yaw, roll = proj->roll;
2369			int32_t *matrix;
2370			int hflip;
2371
2372	5/6 ✓ Branch 0 taken 326 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 323 times. ✓ Branch 3 taken 3 times. ✓ Branch 4 taken 321 times. ✓ Branch 5 taken 2 times.	326	if (pitch == 0.0 && yaw == 0.0 && roll == 0.0)
2373		321	return 0;
2374
2375			/* Note: The following constants are exactly representable
2376			* as floating-point numbers. */
2377	6/10 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 3 times. ✓ Branch 3 taken 2 times. ✓ Branch 4 taken 3 times. ✗ Branch 5 not taken. ✓ Branch 6 taken 3 times. ✗ Branch 7 not taken. ✗ Branch 8 not taken. ✓ Branch 9 taken 5 times.	5	if (pitch != 0.0 || (yaw != 0.0 && yaw != 180.0 && yaw != -180.0) ||
2378			isnan(roll)) {
2379		✗	av_log(logctx, AV_LOG_WARNING, "Ignoring non-2D rectangular "
2380			"projection in stream %u (yaw %f, pitch %f, roll %f)\n",
2381			st->index, yaw, pitch, roll);
2382		✗	return 0;
2383			}
2384		5	sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2385		5	&st->codecpar->nb_coded_side_data,
2386			AV_PKT_DATA_DISPLAYMATRIX,
2387			9 * sizeof(*matrix), 0);
2388	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times.	5	if (!sd)
2389		✗	return AVERROR(ENOMEM);
2390		5	matrix = (int32_t*)sd->data;
2391
2392		5	hflip = yaw != 0.0;
2393			/* ProjectionPoseRoll is in the counter-clockwise direction
2394			* whereas av_display_rotation_set() expects its argument
2395			* to be oriented clockwise, so we need to negate roll.
2396			* Furthermore, if hflip is set, we need to negate it again
2397			* to account for the fact that the Matroska specifications
2398			* require the yaw rotation to be applied first. */
2399		5	av_display_rotation_set(matrix, roll * (2 * hflip - 1));
2400		5	av_display_matrix_flip(matrix, hflip, 0);
2401
2402		5	return 0;
2403			}
2404
2405		332	static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track,
2406			void *logctx)
2407			{
2408			AVSphericalMapping *spherical;
2409		332	const MatroskaTrackVideoProjection *mkv_projection = &track->video.projection;
2410		332	const uint8_t *priv_data = mkv_projection->private.data;
2411			enum AVSphericalProjection projection;
2412			size_t spherical_size;
2413		332	uint32_t l = 0, t = 0, r = 0, b = 0;
2414		332	uint32_t padding = 0;
2415
2416	3/4 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 326 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 6 times.	332	if (mkv_projection->private.size && priv_data[0] != 0) {
2417		✗	av_log(logctx, AV_LOG_WARNING, "Unknown spherical metadata\n");
2418		✗	return 0;
2419			}
2420
2421	2/4 ✓ Branch 0 taken 326 times. ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	332	switch (track->video.projection.type) {
2422		326	case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2423		326	return mkv_create_display_matrix(st, mkv_projection, logctx);
2424		6	case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2425	1/2 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken.	6	if (track->video.projection.private.size == 20) {
2426		6	t = AV_RB32(priv_data + 4);
2427		6	b = AV_RB32(priv_data + 8);
2428		6	l = AV_RB32(priv_data + 12);
2429		6	r = AV_RB32(priv_data + 16);
2430
2431	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) {
2432		✗	av_log(logctx, AV_LOG_ERROR,
2433			"Invalid bounding rectangle coordinates "
2434			"%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2435			l, t, r, b);
2436		✗	return AVERROR_INVALIDDATA;
2437			}
2438		✗	} else if (track->video.projection.private.size != 0) {
2439		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2440		✗	return AVERROR_INVALIDDATA;
2441			}
2442
2443	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)
2444		6	projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2445			else
2446		✗	projection = AV_SPHERICAL_EQUIRECTANGULAR;
2447		6	break;
2448		✗	case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2449		✗	if (track->video.projection.private.size < 4) {
2450		✗	av_log(logctx, AV_LOG_ERROR, "Missing projection private properties\n");
2451		✗	return AVERROR_INVALIDDATA;
2452		✗	} else if (track->video.projection.private.size == 12) {
2453		✗	uint32_t layout = AV_RB32(priv_data + 4);
2454		✗	if (layout) {
2455		✗	av_log(logctx, AV_LOG_WARNING,
2456			"Unknown spherical cubemap layout %"PRIu32"\n", layout);
2457		✗	return 0;
2458			}
2459		✗	projection = AV_SPHERICAL_CUBEMAP;
2460		✗	padding = AV_RB32(priv_data + 8);
2461			} else {
2462		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2463		✗	return AVERROR_INVALIDDATA;
2464			}
2465		✗	break;
2466		✗	default:
2467		✗	av_log(logctx, AV_LOG_WARNING,
2468			"Unknown spherical metadata type %"PRIu64"\n",
2469		✗	track->video.projection.type);
2470		✗	return 0;
2471			}
2472
2473		6	spherical = av_spherical_alloc(&spherical_size);
2474	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!spherical)
2475		✗	return AVERROR(ENOMEM);
2476
2477		6	spherical->projection = projection;
2478
2479		6	spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2480		6	spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2481		6	spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2482
2483		6	spherical->padding = padding;
2484
2485		6	spherical->bound_left = l;
2486		6	spherical->bound_top = t;
2487		6	spherical->bound_right = r;
2488		6	spherical->bound_bottom = b;
2489
2490	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,
2491			AV_PKT_DATA_SPHERICAL, spherical, spherical_size, 0)) {
2492		✗	av_freep(&spherical);
2493		✗	return AVERROR(ENOMEM);
2494			}
2495
2496		6	return 0;
2497			}
2498
2499		4	static int mkv_parse_dvcc_dvvc(AVFormatContext *s, AVStream *st, const MatroskaTrack *track,
2500			EbmlBin *bin)
2501			{
2502		4	return ff_isom_parse_dvcc_dvvc(s, st, bin->data, bin->size);
2503			}
2504
2505		440	static int mkv_parse_block_addition_mappings(AVFormatContext *s, AVStream *st, MatroskaTrack *track)
2506			{
2507		440	const EbmlList *mappings_list = &track->block_addition_mappings;
2508		440	MatroskaBlockAdditionMapping *mappings = mappings_list->elem;
2509			int ret;
2510
2511	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 440 times.	446	for (int i = 0; i < mappings_list->nb_elem; i++) {
2512		6	MatroskaBlockAdditionMapping *mapping = &mappings[i];
2513		6	uint64_t type = mapping->type;
2514
2515	2/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	6	switch (mapping->type) {
2516		✗	case MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT:
2517		✗	av_log(s, AV_LOG_DEBUG,
2518			"Explicit block Addition Mapping type \"Use BlockAddIDValue\", value %"PRIu64","
2519		✗	" name \"%s\" found.\n", mapping->value, mapping->name ? mapping->name : "");
2520		✗	type = MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE;
2521			// fall-through
2522		2	case MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE:
2523			case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35:
2524	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (mapping->value != type) {
2525		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2526		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2527			"Invalid Block Addition Value 0x%"PRIx64" for Block Addition Mapping Type "
2528			"0x%"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2529		✗	mapping->name ? mapping->name : "");
2530		✗	if (strict)
2531		✗	return AVERROR_INVALIDDATA;
2532			}
2533		2	break;
2534		4	case MATROSKA_BLOCK_ADD_ID_TYPE_DVCC:
2535			case MATROSKA_BLOCK_ADD_ID_TYPE_DVVC:
2536	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if ((ret = mkv_parse_dvcc_dvvc(s, st, track, &mapping->extradata)) < 0)
2537		✗	return ret;
2538
2539		4	break;
2540		✗	default:
2541		✗	av_log(s, AV_LOG_DEBUG,
2542			"Unknown Block Addition Mapping type 0x%"PRIx64", value %"PRIu64", name \"%s\"\n",
2543		✗	mapping->type, mapping->value, mapping->name ? mapping->name : "");
2544		✗	if (mapping->value < 2) {
2545		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2546		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2547			"Invalid Block Addition value 0x%"PRIu64" for unknown Block Addition Mapping "
2548			"type %"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2549		✗	mapping->name ? mapping->name : "");
2550		✗	if (strict)
2551		✗	return AVERROR_INVALIDDATA;
2552			}
2553		✗	break;
2554			}
2555			}
2556
2557		440	return 0;
2558			}
2559
2560		1	static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2561			{
2562			const AVCodecTag *codec_tags;
2563
2564		2	codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2565	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2566
2567			/* Normalize noncompliant private data that starts with the fourcc
2568			* by expanding/shifting the data by 4 bytes and storing the data
2569			* size at the start. */
2570	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))) {
2571		✗	int ret = av_buffer_realloc(&track->codec_priv.buf,
2572		✗	track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2573		✗	if (ret < 0)
2574		✗	return ret;
2575
2576		✗	track->codec_priv.data = track->codec_priv.buf->data;
2577		✗	memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2578		✗	track->codec_priv.size += 4;
2579		✗	AV_WB32(track->codec_priv.data, track->codec_priv.size);
2580			}
2581
2582		1	*fourcc = AV_RL32(track->codec_priv.data + 4);
2583		1	*codec_id = ff_codec_get_id(codec_tags, *fourcc);
2584
2585		1	return 0;
2586			}
2587
2588			/* An enum with potential return values of the functions for parsing a track.
2589			* Apart from that all these functions can also indicate ordinary errors via
2590			* negative return values. */
2591			enum {
2592			SKIP_TRACK = 1,
2593			};
2594
2595			#define AAC_MAX_EXTRADATA_SIZE 5
2596			#define TTA_EXTRADATA_SIZE 22
2597			#define WAVPACK_EXTRADATA_SIZE 2
2598			/* Performs the codec-specific part of parsing an audio track. */
2599		84	static int mka_parse_audio_codec(MatroskaTrack *track, AVCodecParameters *par,
2600			const MatroskaDemuxContext *matroska,
2601			AVFormatContext *s, int *extradata_offset)
2602			{
2603			uint8_t extradata[FFMAX3(AAC_MAX_EXTRADATA_SIZE,
2604			TTA_EXTRADATA_SIZE,
2605			WAVPACK_EXTRADATA_SIZE)];
2606		84	int extradata_size = 0; // > 0 means that the extradata buffer is used
2607			int ret;
2608
2609	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 83 times.	84	if (!strcmp(track->codec_id, "A_MS/ACM") &&
2610	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 14) {
2611			FFIOContext b;
2612		1	ffio_init_read_context(&b, track->codec_priv.data,
2613			track->codec_priv.size);
2614		1	ret = ff_get_wav_header(s, &b.pub, par,
2615			track->codec_priv.size, 0);
2616	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2617		✗	return ret;
2618		1	*extradata_offset = FFMIN(track->codec_priv.size, 18);
2619		1	return 0;
2620	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	} else if (!strcmp(track->codec_id, "A_QUICKTIME") &&
2621			/* Normally 36, but allow noncompliant private data */
2622		✗	track->codec_priv.size >= 32) {
2623			enum AVCodecID codec_id;
2624			uint32_t fourcc;
2625			uint16_t sample_size;
2626
2627		✗	ret = get_qt_codec(track, &fourcc, &codec_id);
2628		✗	if (ret < 0)
2629		✗	return ret;
2630		✗	sample_size = AV_RB16(track->codec_priv.data + 26);
2631		✗	if (fourcc == 0) {
2632		✗	if (sample_size == 8) {
2633		✗	fourcc = MKTAG('r','a','w',' ');
2634		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2635		✗	} else if (sample_size == 16) {
2636		✗	fourcc = MKTAG('t','w','o','s');
2637		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2638			}
2639			}
2640		✗	if ((fourcc == MKTAG('t','w','o','s') ||
2641		✗	fourcc == MKTAG('s','o','w','t')) && sample_size == 8)
2642		✗	codec_id = AV_CODEC_ID_PCM_S8;
2643		✗	par->codec_id = codec_id;
2644		✗	par->codec_tag = fourcc;
2645		✗	return 0;
2646			}
2647
2648	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) {
2649		5	case AV_CODEC_ID_PCM_S16BE:
2650	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) {
2651		✗	case 8:
2652		✗	par->codec_id = AV_CODEC_ID_PCM_U8;
2653		✗	break;
2654		1	case 24:
2655		1	par->codec_id = AV_CODEC_ID_PCM_S24BE;
2656		1	break;
2657		2	case 32:
2658		2	par->codec_id = AV_CODEC_ID_PCM_S32BE;
2659		2	break;
2660			}
2661		5	break;
2662		7	case AV_CODEC_ID_PCM_S16LE:
2663	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) {
2664		1	case 8:
2665		1	par->codec_id = AV_CODEC_ID_PCM_U8;
2666		1	break;
2667		3	case 24:
2668		3	par->codec_id = AV_CODEC_ID_PCM_S24LE;
2669		3	break;
2670		2	case 32:
2671		2	par->codec_id = AV_CODEC_ID_PCM_S32LE;
2672		2	break;
2673			}
2674		7	break;
2675		✗	case AV_CODEC_ID_PCM_F32LE:
2676		✗	if (track->audio.bitdepth == 64)
2677		✗	par->codec_id = AV_CODEC_ID_PCM_F64LE;
2678		✗	break;
2679		12	case AV_CODEC_ID_AAC:
2680	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!track->codec_priv.size) {
2681		✗	int profile = matroska_aac_profile(track->codec_id);
2682		✗	int sri = matroska_aac_sri(track->audio.samplerate);
2683
2684		✗	extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2685		✗	extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2686		✗	if (strstr(track->codec_id, "SBR")) {
2687		✗	sri = matroska_aac_sri(track->audio.out_samplerate);
2688		✗	extradata[2] = 0x56;
2689		✗	extradata[3] = 0xE5;
2690		✗	extradata[4] = 0x80 | (sri << 3);
2691		✗	extradata_size = 5;
2692			} else
2693		✗	extradata_size = 2;
2694			}
2695		12	break;
2696		2	case AV_CODEC_ID_ALAC:
2697	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) {
2698			/* Only ALAC's magic cookie is stored in Matroska's track headers.
2699			* Create the "atom size", "tag", and "tag version" fields the
2700			* decoder expects manually. */
2701		2	ret = ff_alloc_extradata(par, 12 + track->codec_priv.size);
2702	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (ret < 0)
2703		✗	return ret;
2704		2	AV_WB32(par->extradata, par->extradata_size);
2705		2	AV_WB32(&par->extradata[4], MKBETAG('a', 'l', 'a', 'c'));
2706		2	AV_WB32(&par->extradata[8], 0);
2707		2	memcpy(&par->extradata[12], track->codec_priv.data,
2708		2	track->codec_priv.size);
2709			}
2710		2	break;
2711		3	case AV_CODEC_ID_TTA:
2712			{
2713			uint8_t *ptr;
2714	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (track->audio.channels > UINT16_MAX ||
2715	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	track->audio.bitdepth > UINT16_MAX) {
2716		✗	av_log(matroska->ctx, AV_LOG_WARNING,
2717			"Too large audio channel number %"PRIu64
2718			" or bitdepth %"PRIu64". Skipping track.\n",
2719			track->audio.channels, track->audio.bitdepth);
2720		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2721		✗	return AVERROR_INVALIDDATA;
2722			else
2723		✗	return SKIP_TRACK;
2724			}
2725	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)
2726		✗	return AVERROR_INVALIDDATA;
2727		3	extradata_size = TTA_EXTRADATA_SIZE;
2728		3	ptr = extradata;
2729		3	bytestream_put_be32(&ptr, AV_RB32("TTA1"));
2730		3	bytestream_put_le16(&ptr, 1);
2731		3	bytestream_put_le16(&ptr, track->audio.channels);
2732		3	bytestream_put_le16(&ptr, track->audio.bitdepth);
2733		3	bytestream_put_le32(&ptr, track->audio.out_samplerate);
2734		3	bytestream_put_le32(&ptr, av_rescale(matroska->duration * matroska->time_scale,
2735		3	track->audio.out_samplerate,
2736			AV_TIME_BASE * 1000));
2737		3	break;
2738			}
2739		✗	case AV_CODEC_ID_RA_144:
2740		✗	track->audio.out_samplerate = 8000;
2741		✗	track->audio.channels = 1;
2742		✗	break;
2743		✗	case AV_CODEC_ID_RA_288:
2744			case AV_CODEC_ID_COOK:
2745			case AV_CODEC_ID_ATRAC3:
2746			case AV_CODEC_ID_SIPR:
2747			{
2748		✗	const uint8_t *ptr = track->codec_priv.data;
2749			int flavor;
2750
2751		✗	if (!track->codec_priv.size)
2752		✗	break;
2753
2754		✗	if (track->codec_priv.size < 46)
2755		✗	return AVERROR_INVALIDDATA;
2756		✗	ptr += 22;
2757		✗	flavor = bytestream_get_be16(&ptr);
2758		✗	track->audio.coded_framesize = bytestream_get_be32(&ptr);
2759		✗	ptr += 12;
2760		✗	track->audio.sub_packet_h = bytestream_get_be16(&ptr);
2761		✗	track->audio.frame_size = bytestream_get_be16(&ptr);
2762		✗	track->audio.sub_packet_size = bytestream_get_be16(&ptr);
2763		✗	if (track->audio.coded_framesize <= 0 ||
2764		✗	track->audio.sub_packet_h <= 0 ||
2765		✗	track->audio.frame_size <= 0)
2766		✗	return AVERROR_INVALIDDATA;
2767
2768		✗	if (par->codec_id == AV_CODEC_ID_RA_288) {
2769		✗	if (track->audio.sub_packet_h & 1 || 2 * track->audio.frame_size
2770		✗	!= (int64_t)track->audio.sub_packet_h * track->audio.coded_framesize)
2771		✗	return AVERROR_INVALIDDATA;
2772		✗	par->block_align = track->audio.coded_framesize;
2773		✗	track->codec_priv.size = 0;
2774			} else {
2775		✗	if (par->codec_id == AV_CODEC_ID_SIPR) {
2776			static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2777		✗	if (flavor > 3)
2778		✗	return AVERROR_INVALIDDATA;
2779		✗	track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2780		✗	par->bit_rate = sipr_bit_rate[flavor];
2781		✗	} else if (track->audio.sub_packet_size <= 0 ||
2782		✗	track->audio.frame_size % track->audio.sub_packet_size)
2783		✗	return AVERROR_INVALIDDATA;
2784		✗	par->block_align = track->audio.sub_packet_size;
2785		✗	*extradata_offset = 78;
2786			}
2787		✗	track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2788		✗	track->audio.frame_size);
2789		✗	if (!track->audio.buf)
2790		✗	return AVERROR(ENOMEM);
2791		✗	break;
2792			}
2793		1	case AV_CODEC_ID_ATRAC1:
2794			/* ATRAC1 uses a constant frame size.
2795			* Typical ATRAC1 streams are either mono or stereo.
2796			* At most, ATRAC1 was used to store 8 channels of audio. */
2797	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (track->audio.channels > 8)
2798		✗	return AVERROR_INVALIDDATA;
2799		1	par->block_align = track->audio.channels * 212;
2800		1	break;
2801		9	case AV_CODEC_ID_FLAC:
2802	1/2 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken.	9	if (track->codec_priv.size) {
2803		9	ret = matroska_parse_flac(s, track, extradata_offset);
2804	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 9 times.	9	if (ret < 0)
2805		✗	return ret;
2806			}
2807		9	break;
2808		2	case AV_CODEC_ID_WAVPACK:
2809	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 1 times.	2	if (track->codec_priv.size < 2) {
2810		1	av_log(matroska->ctx, AV_LOG_INFO, "Assuming WavPack version 4.10 "
2811			"in absence of valid CodecPrivate.\n");
2812		1	extradata_size = WAVPACK_EXTRADATA_SIZE;
2813		1	AV_WL16(extradata, 0x410);
2814			}
2815		2	break;
2816			}
2817
2818	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 79 times.	83	if (extradata_size > 0) {
2819		4	ret = ff_alloc_extradata(par, extradata_size);
2820	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (ret < 0)
2821		✗	return ret;
2822		4	memcpy(par->extradata, extradata, extradata_size);
2823			}
2824
2825		83	return 0;
2826			}
2827
2828			/* Performs the generic part of parsing an audio track. */
2829		84	static int mka_parse_audio(MatroskaTrack *track, AVStream *st,
2830			AVCodecParameters *par,
2831			const MatroskaDemuxContext *matroska,
2832			AVFormatContext *s, int *extradata_offset)
2833			{
2834		84	FFStream *const sti = ffstream(st);
2835			int ret;
2836
2837		84	ret = mka_parse_audio_codec(track, par, matroska,
2838			s, extradata_offset);
2839	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret)
2840		✗	return ret;
2841
2842		84	par->codec_type = AVMEDIA_TYPE_AUDIO;
2843		84	par->sample_rate = track->audio.out_samplerate;
2844			// channel layout may be already set by codec private checks above
2845	2/2 ✓ Branch 1 taken 75 times. ✓ Branch 2 taken 9 times.	84	if (!av_channel_layout_check(&par->ch_layout)) {
2846		75	par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
2847		75	par->ch_layout.nb_channels = track->audio.channels;
2848			}
2849	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!par->bits_per_coded_sample)
2850		83	par->bits_per_coded_sample = track->audio.bitdepth;
2851	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (par->codec_id == AV_CODEC_ID_MP3 ||
2852	1/2 ✓ Branch 0 taken 83 times. ✗ Branch 1 not taken.	83	par->codec_id == AV_CODEC_ID_MLP ||
2853	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	par->codec_id == AV_CODEC_ID_TRUEHD)
2854		1	sti->need_parsing = AVSTREAM_PARSE_FULL;
2855	2/2 ✓ Branch 0 taken 71 times. ✓ Branch 1 taken 12 times.	83	else if (par->codec_id != AV_CODEC_ID_AAC)
2856		71	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
2857	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 73 times.	84	if (track->codec_delay > 0) {
2858		11	par->initial_padding = av_rescale_q(track->codec_delay,
2859		11	(AVRational){1, 1000000000},
2860		11	(AVRational){1, par->codec_id == AV_CODEC_ID_OPUS ?
2861	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 6 times.	11	48000 : par->sample_rate});
2862			}
2863	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 77 times.	84	if (track->seek_preroll > 0) {
2864		7	par->seek_preroll = av_rescale_q(track->seek_preroll,
2865		7	(AVRational){1, 1000000000},
2866		7	(AVRational){1, par->sample_rate});
2867			}
2868
2869		84	return 0;
2870			}
2871
2872			/* Performs the codec-specific part of parsing a video track. */
2873		332	static int mkv_parse_video_codec(MatroskaTrack *track, AVCodecParameters *par,
2874			const MatroskaDemuxContext *matroska,
2875			int *extradata_offset)
2876			{
2877	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 327 times.	332	if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2878	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	track->codec_priv.size >= 40) {
2879		5	track->ms_compat = 1;
2880		5	par->bits_per_coded_sample = AV_RL16(track->codec_priv.data + 14);
2881		5	par->codec_tag = AV_RL32(track->codec_priv.data + 16);
2882		5	par->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2883			par->codec_tag);
2884	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times.	5	if (!par->codec_id)
2885		✗	par->codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2886			par->codec_tag);
2887		5	*extradata_offset = 40;
2888		5	return 0;
2889	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 326 times.	327	} else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2890	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 21) {
2891			enum AVCodecID codec_id;
2892			uint32_t fourcc;
2893		1	int ret = get_qt_codec(track, &fourcc, &codec_id);
2894	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2895		✗	return ret;
2896	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 ")) {
2897		✗	fourcc = MKTAG('S','V','Q','3');
2898		✗	codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2899			}
2900		1	par->codec_id = codec_id;
2901	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (codec_id == AV_CODEC_ID_NONE)
2902		✗	av_log(matroska->ctx, AV_LOG_ERROR,
2903		✗	"mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2904	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.size >= 86) {
2905			FFIOContext b;
2906		1	unsigned bit_depth = AV_RB16(track->codec_priv.data + 82);
2907		1	ffio_init_read_context(&b, track->codec_priv.data,
2908			track->codec_priv.size);
2909	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (ff_get_qtpalette(codec_id, &b.pub, track->palette)) {
2910		✗	bit_depth &= 0x1F;
2911		✗	track->has_palette = 1;
2912			}
2913		1	par->bits_per_coded_sample = bit_depth;
2914			}
2915		1	par->codec_tag = fourcc;
2916		1	return 0;
2917			}
2918
2919	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times. ✓ Branch 2 taken 249 times. ✓ Branch 3 taken 72 times.	326	switch (par->codec_id) {
2920		✗	case AV_CODEC_ID_RV10:
2921			case AV_CODEC_ID_RV20:
2922			case AV_CODEC_ID_RV30:
2923			case AV_CODEC_ID_RV40:
2924		✗	*extradata_offset = 26;
2925		✗	break;
2926		5	case AV_CODEC_ID_PRORES:
2927	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	if (track->codec_priv.size == 4)
2928		5	par->codec_tag = AV_RL32(track->codec_priv.data);
2929		5	break;
2930		249	case AV_CODEC_ID_VP9:
2931			/* we don't need any value stored in CodecPrivate.
2932			* make sure that it's not exported as extradata. */
2933		249	track->codec_priv.size = 0;
2934		249	break;
2935			}
2936
2937		326	return 0;
2938			}
2939
2940			/* Performs the generic part of parsing a video track. */
2941		332	static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
2942			AVCodecParameters *par,
2943			const MatroskaDemuxContext *matroska,
2944			int *extradata_offset)
2945			{
2946		332	FFStream *const sti = ffstream(st);
2947			MatroskaTrackPlane *planes;
2948		332	int display_width_mul = 1;
2949		332	int display_height_mul = 1;
2950			int ret;
2951
2952	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 328 times.	332	if (track->video.color_space.size == 4)
2953		4	par->codec_tag = AV_RL32(track->video.color_space.data);
2954
2955		332	ret = mkv_parse_video_codec(track, par, matroska,
2956			extradata_offset);
2957	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	if (ret < 0)
2958		✗	return ret;
2959
2960		332	par->codec_type = AVMEDIA_TYPE_VIDEO;
2961		332	par->width = track->video.pixel_width;
2962		332	par->height = track->video.pixel_height;
2963
2964	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 325 times.	332	if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2965		7	par->field_order = mkv_field_order(matroska, track->video.field_order);
2966	2/2 ✓ Branch 0 taken 19 times. ✓ Branch 1 taken 306 times.	325	else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2967		19	par->field_order = AV_FIELD_PROGRESSIVE;
2968
2969	4/4 ✓ Branch 0 taken 104 times. ✓ Branch 1 taken 228 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 92 times.	332	if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2970		12	mkv_stereo_mode_display_mul(track->video.stereo_mode,
2971			&display_width_mul, &display_height_mul);
2972
2973	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 21 times.	332	if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2974	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 &&
2975	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 &&
2976	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 &&
2977	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)
2978		311	av_reduce(&st->sample_aspect_ratio.num,
2979			&st->sample_aspect_ratio.den,
2980		311	track->video.cropped_height * track->video.display_width * display_width_mul,
2981		311	track->video.cropped_width * track->video.display_height * display_height_mul,
2982			INT_MAX);
2983			}
2984	1/2 ✓ Branch 0 taken 332 times. ✗ Branch 1 not taken.	332	if (track->video.cropped_width != track->video.pixel_width ||
2985	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	track->video.cropped_height != track->video.pixel_height) {
2986			uint8_t *cropping;
2987		✗	AVPacketSideData *sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2988		✗	&st->codecpar->nb_coded_side_data,
2989			AV_PKT_DATA_FRAME_CROPPING,
2990			sizeof(uint32_t) * 4, 0);
2991		✗	if (!sd)
2992		✗	return AVERROR(ENOMEM);
2993
2994		✗	cropping = sd->data;
2995		✗	bytestream_put_le32(&cropping, track->video.pixel_cropt);
2996		✗	bytestream_put_le32(&cropping, track->video.pixel_cropb);
2997		✗	bytestream_put_le32(&cropping, track->video.pixel_cropl);
2998		✗	bytestream_put_le32(&cropping, track->video.pixel_cropr);
2999			}
3000	2/2 ✓ Branch 0 taken 323 times. ✓ Branch 1 taken 9 times.	332	if (par->codec_id != AV_CODEC_ID_HEVC)
3001		323	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
3002
3003	2/2 ✓ Branch 0 taken 290 times. ✓ Branch 1 taken 42 times.	332	if (track->default_duration) {
3004	1/2 ✓ Branch 0 taken 290 times. ✗ Branch 1 not taken.	290	int div = track->default_duration <= INT64_MAX ? 1 : 2;
3005		290	av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3006		290	1000000000 / div, track->default_duration / div, 30000);
3007			#if FF_API_R_FRAME_RATE
3008	2/2 ✓ Branch 0 taken 288 times. ✓ Branch 1 taken 2 times.	290	if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
3009	2/2 ✓ Branch 0 taken 273 times. ✓ Branch 1 taken 15 times.	288	&& st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
3010		273	st->r_frame_rate = st->avg_frame_rate;
3011			#endif
3012			}
3013
3014			/* export stereo mode flag as metadata tag */
3015	4/4 ✓ Branch 0 taken 104 times. ✓ Branch 1 taken 228 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 92 times.	332	if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
3016		12	av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
3017
3018			/* export alpha mode flag as metadata tag */
3019	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 329 times.	332	if (track->video.alpha_mode)
3020		3	av_dict_set_int(&st->metadata, "alpha_mode", 1, 0);
3021
3022			/* if we have virtual track, mark the real tracks */
3023		332	planes = track->operation.combine_planes.elem;
3024	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	for (int j = 0; j < track->operation.combine_planes.nb_elem; j++) {
3025		✗	MatroskaTrack *tracks = matroska->tracks.elem;
3026			char buf[32];
3027		✗	if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
3028		✗	continue;
3029		✗	snprintf(buf, sizeof(buf), "%s_%d",
3030		✗	matroska_video_stereo_plane[planes[j].type], st->index);
3031		✗	for (int k = 0; k < matroska->tracks.nb_elem; k++)
3032		✗	if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
3033		✗	av_dict_set(&tracks[k].stream->metadata,
3034			"stereo_mode", buf, 0);
3035		✗	break;
3036			}
3037			}
3038			// add stream level stereo3d side data if it is a supported format
3039	2/2 ✓ Branch 0 taken 240 times. ✓ Branch 1 taken 92 times.	332	if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
3040	2/2 ✓ Branch 0 taken 238 times. ✓ Branch 1 taken 2 times.	240	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_CYAN_RED &&
3041	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 2 times.	238	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_GREEN_MAG) {
3042		236	int ret = mkv_stereo3d_conv(st, track->video.stereo_mode);
3043	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (ret < 0)
3044		✗	return ret;
3045			}
3046
3047		332	ret = mkv_parse_video_color(st, track);
3048	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	if (ret < 0)
3049		✗	return ret;
3050		332	ret = mkv_parse_video_projection(st, track, matroska->ctx);
3051	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	if (ret < 0)
3052		✗	return ret;
3053
3054		332	return 0;
3055			}
3056
3057			/* Performs the codec-specific part of parsing a subtitle track. */
3058		24	static int mkv_parse_subtitle_codec(MatroskaTrack *track, AVStream *st,
3059			AVCodecParameters *par,
3060			const MatroskaDemuxContext *matroska)
3061			{
3062	2/3 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 16 times.	24	switch (par->codec_id) {
3063		✗	case AV_CODEC_ID_ARIB_CAPTION:
3064		✗	if (track->codec_priv.size == 3) {
3065		✗	int component_tag = track->codec_priv.data[0];
3066		✗	int data_component_id = AV_RB16(track->codec_priv.data + 1);
3067
3068		✗	switch (data_component_id) {
3069		✗	case 0x0008:
3070			// [0x30..0x37] are component tags utilized for
3071			// non-mobile captioning service ("profile A").
3072		✗	if (component_tag >= 0x30 && component_tag <= 0x37) {
3073		✗	par->profile = AV_PROFILE_ARIB_PROFILE_A;
3074			}
3075		✗	break;
3076		✗	case 0x0012:
3077			// component tag 0x87 signifies a mobile/partial reception
3078			// (1seg) captioning service ("profile C").
3079		✗	if (component_tag == 0x87) {
3080		✗	par->profile = AV_PROFILE_ARIB_PROFILE_C;
3081			}
3082		✗	break;
3083		✗	default:
3084		✗	break;
3085			}
3086
3087		✗	if (par->profile == AV_PROFILE_UNKNOWN)
3088		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3089			"Unknown ARIB caption profile utilized: %02x / %04x\n",
3090			component_tag, data_component_id);
3091
3092		✗	track->codec_priv.size = 0;
3093			}
3094		✗	break;
3095		8	case AV_CODEC_ID_WEBVTT:
3096	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 6 times.	8	if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
3097		2	st->disposition |= AV_DISPOSITION_CAPTIONS;
3098	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times.	6	} else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
3099		2	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3100	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	} else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
3101		2	st->disposition |= AV_DISPOSITION_METADATA;
3102			}
3103		8	break;
3104			}
3105
3106		24	return 0;
3107			}
3108
3109		369	static int matroska_parse_tracks(AVFormatContext *s)
3110			{
3111		369	MatroskaDemuxContext *matroska = s->priv_data;
3112		369	MatroskaTrack *tracks = matroska->tracks.elem;
3113			int i, j, ret;
3114
3115	2/2 ✓ Branch 0 taken 440 times. ✓ Branch 1 taken 369 times.	809	for (i = 0; i < matroska->tracks.nb_elem; i++) {
3116		440	MatroskaTrack *track = &tracks[i];
3117		440	enum AVCodecID codec_id = AV_CODEC_ID_NONE;
3118			AVCodecParameters *par;
3119			MatroskaTrackType type;
3120		440	int extradata_offset = 0;
3121			AVStream *st;
3122		440	char* key_id_base64 = NULL;
3123
3124			/* Apply some sanity checks. */
3125	2/2 ✓ Branch 0 taken 108 times. ✓ Branch 1 taken 332 times.	440	if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
3126	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 84 times.	108	track->type != MATROSKA_TRACK_TYPE_AUDIO &&
3127	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 20 times.	24	track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
3128	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	track->type != MATROSKA_TRACK_TYPE_METADATA) {
3129		✗	av_log(matroska->ctx, AV_LOG_INFO,
3130			"Unknown or unsupported track type %"PRIu64"\n",
3131			track->type);
3132		✗	continue;
3133			}
3134	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (!track->codec_id)
3135		✗	continue;
3136
3137	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 356 times. ✓ Branch 2 taken 84 times. ✗ Branch 3 not taken.	440	if ( track->type == MATROSKA_TRACK_TYPE_AUDIO && track->codec_id[0] != 'A'
3138	3/4 ✓ Branch 0 taken 332 times. ✓ Branch 1 taken 108 times. ✓ Branch 2 taken 332 times. ✗ Branch 3 not taken.	440	|| track->type == MATROSKA_TRACK_TYPE_VIDEO && track->codec_id[0] != 'V'
3139	5/6 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 420 times. ✓ Branch 2 taken 16 times. ✓ Branch 3 taken 4 times. ✓ Branch 4 taken 16 times. ✗ Branch 5 not taken.	440	|| track->type == MATROSKA_TRACK_TYPE_SUBTITLE && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
3140	3/6 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 436 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 4 times. ✗ Branch 4 not taken. ✗ Branch 5 not taken.	440	|| track->type == MATROSKA_TRACK_TYPE_METADATA && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
3141			) {
3142		✗	av_log(matroska->ctx, AV_LOG_INFO, "Inconsistent track type\n");
3143		✗	continue;
3144			}
3145
3146	2/4 ✓ Branch 0 taken 440 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 440 times. ✗ Branch 3 not taken.	440	if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
3147	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	isnan(track->audio.samplerate)) {
3148		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3149			"Invalid sample rate %f, defaulting to 8000 instead.\n",
3150			track->audio.samplerate);
3151		✗	track->audio.samplerate = 8000;
3152			}
3153
3154	2/2 ✓ Branch 0 taken 332 times. ✓ Branch 1 taken 108 times.	440	if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
3155	4/4 ✓ Branch 0 taken 246 times. ✓ Branch 1 taken 86 times. ✓ Branch 2 taken 204 times. ✓ Branch 3 taken 42 times.	332	if (!track->default_duration && track->video.frame_rate > 0) {
3156		204	double default_duration = 1000000000 / track->video.frame_rate;
3157	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) {
3158		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3159			"Invalid frame rate %e. Cannot calculate default duration.\n",
3160			track->video.frame_rate);
3161			} else {
3162		204	track->default_duration = default_duration;
3163			}
3164			}
3165	1/2 ✓ Branch 0 taken 332 times. ✗ Branch 1 not taken.	332	if (track->video.pixel_cropl >= INT_MAX - track->video.pixel_cropr ||
3166	1/2 ✓ Branch 0 taken 332 times. ✗ Branch 1 not taken.	332	track->video.pixel_cropt >= INT_MAX - track->video.pixel_cropb ||
3167	1/2 ✓ Branch 0 taken 332 times. ✗ Branch 1 not taken.	332	(track->video.pixel_cropl + track->video.pixel_cropr) >= track->video.pixel_width ||
3168	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	(track->video.pixel_cropt + track->video.pixel_cropb) >= track->video.pixel_height)
3169		✗	return AVERROR_INVALIDDATA;
3170		332	track->video.cropped_width = track->video.pixel_width -
3171		332	track->video.pixel_cropl - track->video.pixel_cropr;
3172		332	track->video.cropped_height = track->video.pixel_height -
3173		332	track->video.pixel_cropt - track->video.pixel_cropb;
3174	2/2 ✓ Branch 0 taken 296 times. ✓ Branch 1 taken 36 times.	332	if (track->video.display_unit == MATROSKA_VIDEO_DISPLAYUNIT_PIXELS) {
3175	2/2 ✓ Branch 0 taken 263 times. ✓ Branch 1 taken 33 times.	296	if (track->video.display_width == -1)
3176		263	track->video.display_width = track->video.cropped_width;
3177	2/2 ✓ Branch 0 taken 263 times. ✓ Branch 1 taken 33 times.	296	if (track->video.display_height == -1)
3178		263	track->video.display_height = track->video.cropped_height;
3179			}
3180	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 24 times.	108	} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
3181	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!track->audio.out_samplerate)
3182		83	track->audio.out_samplerate = track->audio.samplerate;
3183			}
3184		440	ret = matroska_parse_content_encodings(track->encodings.elem,
3185		440	track->encodings.nb_elem,
3186		440	track, &key_id_base64, matroska->ctx);
3187	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (ret < 0)
3188		✗	return ret;
3189
3190	2/2 ✓ Branch 0 taken 25753 times. ✓ Branch 1 taken 7 times.	25760	for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
3191	2/2 ✓ Branch 1 taken 433 times. ✓ Branch 2 taken 25320 times.	25753	if (av_strstart(track->codec_id, ff_mkv_codec_tags[j].str, NULL)) {
3192		433	codec_id = ff_mkv_codec_tags[j].id;
3193		433	break;
3194			}
3195			}
3196
3197		440	st = track->stream = avformat_new_stream(s, NULL);
3198	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (!st) {
3199		✗	av_free(key_id_base64);
3200		✗	return AVERROR(ENOMEM);
3201			}
3202		440	par = st->codecpar;
3203
3204		440	par->codec_id = codec_id;
3205
3206	2/2 ✓ Branch 0 taken 353 times. ✓ Branch 1 taken 87 times.	440	if (track->flag_default)
3207		353	st->disposition |= AV_DISPOSITION_DEFAULT;
3208	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 436 times.	440	if (track->flag_forced)
3209		4	st->disposition |= AV_DISPOSITION_FORCED;
3210	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 438 times.	440	if (track->flag_comment)
3211		2	st->disposition |= AV_DISPOSITION_COMMENT;
3212	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 432 times.	440	if (track->flag_hearingimpaired)
3213		8	st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
3214	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 438 times.	440	if (track->flag_visualimpaired)
3215		2	st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
3216	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 436 times.	440	if (track->flag_original.count > 0)
3217		4	st->disposition |= track->flag_original.el.u ? AV_DISPOSITION_ORIGINAL
3218	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	: AV_DISPOSITION_DUB;
3219
3220	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (key_id_base64) {
3221			/* export encryption key id as base64 metadata tag */
3222		✗	av_dict_set(&st->metadata, "enc_key_id", key_id_base64,
3223			AV_DICT_DONT_STRDUP_VAL);
3224			}
3225
3226	2/2 ✓ Branch 0 taken 323 times. ✓ Branch 1 taken 117 times.	440	if (strcmp(track->language, "und"))
3227		323	av_dict_set(&st->metadata, "language", track->language, 0);
3228		440	av_dict_set(&st->metadata, "title", track->name, 0);
3229
3230	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (track->time_scale < 0.01) {
3231		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3232			"Track TimestampScale too small %f, assuming 1.0.\n",
3233			track->time_scale);
3234		✗	track->time_scale = 1.0;
3235			}
3236
3237	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (matroska->time_scale * track->time_scale > UINT_MAX)
3238		✗	return AVERROR_INVALIDDATA;
3239
3240		440	avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
3241			1000 * 1000 * 1000); /* 64 bit pts in ns */
3242
3243			/* convert the delay from ns to the track timebase */
3244		440	track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
3245		440	(AVRational){ 1, 1000000000 },
3246			st->time_base);
3247
3248		440	type = track->type;
3249	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 432 times.	440	if (par->codec_id == AV_CODEC_ID_WEBVTT)
3250		8	type = MATROSKA_TRACK_TYPE_SUBTITLE;
3251	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 332 times. ✓ Branch 2 taken 24 times. ✗ Branch 3 not taken.	440	switch (type) {
3252		84	case MATROSKA_TRACK_TYPE_AUDIO:
3253		84	ret = mka_parse_audio(track, st, par, matroska,
3254			s, &extradata_offset);
3255	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret < 0)
3256		✗	return ret;
3257	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret == SKIP_TRACK)
3258		✗	continue;
3259		84	break;
3260		332	case MATROSKA_TRACK_TYPE_VIDEO:
3261		332	ret = mkv_parse_video(track, st, par, matroska, &extradata_offset);
3262	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 332 times.	332	if (ret < 0)
3263		✗	return ret;
3264		332	break;
3265		24	case MATROSKA_TRACK_TYPE_SUBTITLE:
3266		24	ret = mkv_parse_subtitle_codec(track, st, par, matroska);
3267	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (ret < 0)
3268		✗	return ret;
3269		24	par->codec_type = AVMEDIA_TYPE_SUBTITLE;
3270
3271	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (track->flag_textdescriptions)
3272		✗	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3273		24	break;
3274			}
3275
3276	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (par->codec_id == AV_CODEC_ID_NONE)
3277		✗	av_log(matroska->ctx, AV_LOG_INFO,
3278			"Unknown/unsupported AVCodecID %s.\n", track->codec_id);
3279
3280	4/4 ✓ Branch 0 taken 433 times. ✓ Branch 1 taken 7 times. ✓ Branch 2 taken 131 times. ✓ Branch 3 taken 302 times.	440	if (!par->extradata && track->codec_priv.size > extradata_offset) {
3281		131	const uint8_t *src = track->codec_priv.data + extradata_offset;
3282		131	unsigned extra_size = track->codec_priv.size - extradata_offset;
3283		131	ret = ff_alloc_extradata(par, extra_size);
3284	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 131 times.	131	if (ret < 0)
3285		✗	return ret;
3286		131	memcpy(par->extradata, src, extra_size);
3287			}
3288
3289		440	ret = mkv_parse_block_addition_mappings(s, st, track);
3290	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 440 times.	440	if (ret < 0)
3291		✗	return ret;
3292			}
3293
3294		369	return 0;
3295			}
3296
3297		369	static int matroska_read_header(AVFormatContext *s)
3298			{
3299		369	FFFormatContext *const si = ffformatcontext(s);
3300		369	MatroskaDemuxContext *matroska = s->priv_data;
3301		369	EbmlList *attachments_list = &matroska->attachments;
3302		369	EbmlList *chapters_list = &matroska->chapters;
3303			MatroskaAttachment *attachments;
3304			MatroskaChapter *chapters;
3305		369	uint64_t max_start = 0;
3306			int64_t pos;
3307		369	Ebml ebml = { 0 };
3308			int i, j, res;
3309
3310		369	matroska->ctx = s;
3311		369	matroska->cues_parsing_deferred = 1;
3312
3313			/* First read the EBML header. */
3314	2/4 ✓ Branch 1 taken 369 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 369 times.	369	if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
3315		✗	av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
3316		✗	ebml_free(ebml_syntax, &ebml);
3317		✗	return AVERROR_INVALIDDATA;
3318			}
3319	1/2 ✓ Branch 0 taken 369 times. ✗ Branch 1 not taken.	369	if (ebml.version > EBML_VERSION ||
3320	1/2 ✓ Branch 0 taken 369 times. ✗ Branch 1 not taken.	369	ebml.max_size > sizeof(uint64_t) ||
3321	1/2 ✓ Branch 0 taken 369 times. ✗ Branch 1 not taken.	369	ebml.id_length > sizeof(uint32_t) ||
3322	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	ebml.doctype_version > 3) {
3323		✗	avpriv_report_missing_feature(matroska->ctx,
3324			"EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
3325			ebml.version, ebml.doctype, ebml.doctype_version);
3326		✗	ebml_free(ebml_syntax, &ebml);
3327		✗	return AVERROR_PATCHWELCOME;
3328	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	} else if (ebml.doctype_version == 3) {
3329		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3330			"EBML header using unsupported features\n"
3331			"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
3332			ebml.version, ebml.doctype, ebml.doctype_version);
3333			}
3334	1/2 ✓ Branch 0 taken 637 times. ✗ Branch 1 not taken.	637	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
3335	2/2 ✓ Branch 0 taken 369 times. ✓ Branch 1 taken 268 times.	637	if (!strcmp(ebml.doctype, matroska_doctypes[i]))
3336		369	break;
3337	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
3338		✗	av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
3339		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
3340		✗	ebml_free(ebml_syntax, &ebml);
3341		✗	return AVERROR_INVALIDDATA;
3342			}
3343			}
3344		369	matroska->is_webm = !strcmp(ebml.doctype, "webm");
3345
3346		369	ebml_free(ebml_syntax, &ebml);
3347
3348		369	matroska->pkt = si->parse_pkt;
3349
3350			/* The next thing is a segment. */
3351		369	pos = avio_tell(matroska->ctx->pb);
3352		369	res = ebml_parse(matroska, matroska_segments, matroska);
3353			// Try resyncing until we find an EBML_STOP type element.
3354	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	while (res != 1) {
3355		✗	res = matroska_resync(matroska, pos);
3356		✗	if (res < 0)
3357		✗	return res;
3358		✗	pos = avio_tell(matroska->ctx->pb);
3359		✗	res = ebml_parse(matroska, matroska_segment, matroska);
3360		✗	if (res == AVERROR(EIO)) // EOF is translated to EIO, this exists the loop on EOF
3361		✗	return res;
3362			}
3363			/* Set data_offset as it might be needed later by seek_frame_generic. */
3364	2/2 ✓ Branch 0 taken 365 times. ✓ Branch 1 taken 4 times.	369	if (matroska->current_id == MATROSKA_ID_CLUSTER)
3365		365	si->data_offset = avio_tell(matroska->ctx->pb) - 4;
3366		369	matroska_execute_seekhead(matroska);
3367
3368	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	if (!matroska->time_scale)
3369		✗	matroska->time_scale = 1000000;
3370	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	if (isnan(matroska->duration))
3371		✗	matroska->duration = 0;
3372	2/2 ✓ Branch 0 taken 358 times. ✓ Branch 1 taken 11 times.	369	if (matroska->duration)
3373		358	matroska->ctx->duration = matroska->duration * matroska->time_scale *
3374		358	1000 / AV_TIME_BASE;
3375		369	av_dict_set(&s->metadata, "title", matroska->title, 0);
3376		369	av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
3377
3378	2/2 ✓ Branch 0 taken 18 times. ✓ Branch 1 taken 351 times.	369	if (matroska->date_utc.size == 8)
3379		18	matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
3380
3381		369	res = matroska_parse_tracks(s);
3382	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 369 times.	369	if (res < 0)
3383		✗	return res;
3384
3385		369	attachments = attachments_list->elem;
3386	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 369 times.	373	for (j = 0; j < attachments_list->nb_elem; j++) {
3387	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 &&
3388	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)) {
3389		✗	av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
3390			} else {
3391		4	AVStream *st = avformat_new_stream(s, NULL);
3392	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (!st)
3393		✗	break;
3394		4	av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
3395		4	av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
3396	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (attachments[j].description)
3397		✗	av_dict_set(&st->metadata, "title", attachments[j].description, 0);
3398		4	st->codecpar->codec_id = AV_CODEC_ID_NONE;
3399
3400	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++) {
3401	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)) {
3402		✗	st->codecpar->codec_id = mkv_image_mime_tags[i].id;
3403		✗	break;
3404			}
3405			}
3406
3407		4	attachments[j].stream = st;
3408
3409	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
3410		✗	res = ff_add_attached_pic(s, st, NULL, &attachments[j].bin.buf, 0);
3411		✗	if (res < 0)
3412		✗	return res;
3413			} else {
3414		4	st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
3415	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
3416		✗	break;
3417		4	memcpy(st->codecpar->extradata, attachments[j].bin.data,
3418		4	attachments[j].bin.size);
3419
3420	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++) {
3421	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if (av_strstart(attachments[j].mime, mkv_mime_tags[i].str, NULL)) {
3422		✗	st->codecpar->codec_id = mkv_mime_tags[i].id;
3423		✗	break;
3424			}
3425			}
3426			}
3427			}
3428			}
3429
3430		369	chapters = chapters_list->elem;
3431	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 369 times.	383	for (i = 0; i < chapters_list->nb_elem; i++)
3432	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 &&
3433	1/2 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken.	4	(max_start == 0 || chapters[i].start > max_start)) {
3434		28	chapters[i].chapter =
3435		14	avpriv_new_chapter(s, chapters[i].uid,
3436		14	(AVRational) { 1, 1000000000 },
3437		14	chapters[i].start, chapters[i].end,
3438		14	chapters[i].title);
3439		14	max_start = chapters[i].start;
3440			}
3441
3442		369	matroska_add_index_entries(matroska);
3443
3444		369	matroska_convert_tags(s);
3445
3446		369	return 0;
3447			}
3448
3449			/*
3450			* Put one packet in an application-supplied AVPacket struct.
3451			* Returns 0 on success or -1 on failure.
3452			*/
3453		60208	static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
3454			AVPacket *pkt)
3455			{
3456	2/2 ✓ Branch 0 taken 29485 times. ✓ Branch 1 taken 30723 times.	60208	if (matroska->queue.head) {
3457		29485	MatroskaTrack *tracks = matroska->tracks.elem;
3458			MatroskaTrack *track;
3459
3460		29485	avpriv_packet_list_get(&matroska->queue, pkt);
3461		29485	track = &tracks[pkt->stream_index];
3462	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29485 times.	29485	if (track->has_palette) {
3463		✗	uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3464		✗	if (!pal) {
3465		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
3466			} else {
3467		✗	memcpy(pal, track->palette, AVPALETTE_SIZE);
3468			}
3469		✗	track->has_palette = 0;
3470			}
3471		29485	return 0;
3472			}
3473
3474		30723	return -1;
3475			}
3476
3477			/*
3478			* Free all packets in our internal queue.
3479			*/
3480		1207	static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3481			{
3482		1207	avpriv_packet_list_free(&matroska->queue);
3483		1207	}
3484
3485		29855	static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3486			int size, int type, AVIOContext *pb,
3487			uint32_t lace_size[256], int *laces)
3488			{
3489			int n;
3490		29855	uint8_t *data = *buf;
3491
3492	2/2 ✓ Branch 0 taken 29780 times. ✓ Branch 1 taken 75 times.	29855	if (!type) {
3493		29780	*laces = 1;
3494		29780	lace_size[0] = size;
3495		29780	return 0;
3496			}
3497
3498	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 75 times.	75	if (size <= 0)
3499		✗	return AVERROR_INVALIDDATA;
3500
3501		75	*laces = *data + 1;
3502		75	data += 1;
3503		75	size -= 1;
3504
3505	3/4 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 17 times. ✓ Branch 2 taken 54 times. ✗ Branch 3 not taken.	75	switch (type) {
3506		4	case 0x1: /* Xiph lacing */
3507			{
3508			uint8_t temp;
3509		4	uint32_t total = 0;
3510	2/2 ✓ Branch 0 taken 23 times. ✓ Branch 1 taken 4 times.	27	for (n = 0; n < *laces - 1; n++) {
3511		23	lace_size[n] = 0;
3512
3513			do {
3514	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 25 times.	25	if (size <= total)
3515		✗	return AVERROR_INVALIDDATA;
3516		25	temp = *data;
3517		25	total += temp;
3518		25	lace_size[n] += temp;
3519		25	data += 1;
3520		25	size -= 1;
3521	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 23 times.	25	} while (temp == 0xff);
3522			}
3523	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (size < total)
3524		✗	return AVERROR_INVALIDDATA;
3525
3526		4	lace_size[n] = size - total;
3527		4	break;
3528			}
3529
3530		17	case 0x2: /* fixed-size lacing */
3531	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 17 times.	17	if (size % (*laces))
3532		✗	return AVERROR_INVALIDDATA;
3533	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 17 times.	98	for (n = 0; n < *laces; n++)
3534		81	lace_size[n] = size / *laces;
3535		17	break;
3536
3537		54	case 0x3: /* EBML lacing */
3538			{
3539			uint64_t num;
3540			uint64_t total;
3541			int offset;
3542
3543		54	avio_skip(pb, 4);
3544
3545		54	n = ebml_read_num(matroska, pb, 8, &num, 1);
3546	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (n < 0)
3547		✗	return n;
3548	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (num > INT_MAX)
3549		✗	return AVERROR_INVALIDDATA;
3550
3551		54	total = lace_size[0] = num;
3552		54	offset = n;
3553	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 54 times.	290	for (n = 1; n < *laces - 1; n++) {
3554			int64_t snum;
3555			int r;
3556		236	r = matroska_ebmlnum_sint(matroska, pb, &snum);
3557	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (r < 0)
3558		✗	return r;
3559	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (lace_size[n - 1] + snum > (uint64_t)INT_MAX)
3560		✗	return AVERROR_INVALIDDATA;
3561
3562		236	lace_size[n] = lace_size[n - 1] + snum;
3563		236	total += lace_size[n];
3564		236	offset += r;
3565			}
3566		54	data += offset;
3567		54	size -= offset;
3568	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (size < total)
3569		✗	return AVERROR_INVALIDDATA;
3570
3571		54	lace_size[*laces - 1] = size - total;
3572		54	break;
3573			}
3574			}
3575
3576		75	*buf = data;
3577
3578		75	return 0;
3579			}
3580
3581		✗	static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3582			MatroskaTrack *track, AVStream *st,
3583			uint8_t *data, int size, uint64_t timecode,
3584			int64_t pos)
3585			{
3586		✗	const int a = st->codecpar->block_align;
3587		✗	const int sps = track->audio.sub_packet_size;
3588		✗	const int cfs = track->audio.coded_framesize;
3589		✗	const int h = track->audio.sub_packet_h;
3590		✗	const int w = track->audio.frame_size;
3591		✗	int y = track->audio.sub_packet_cnt;
3592			int x;
3593
3594		✗	if (!track->audio.pkt_cnt) {
3595		✗	if (track->audio.sub_packet_cnt == 0)
3596		✗	track->audio.buf_timecode = timecode;
3597		✗	if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3598		✗	if (size < cfs * h / 2) {
3599		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3600			"Corrupt int4 RM-style audio packet size\n");
3601		✗	return AVERROR_INVALIDDATA;
3602			}
3603		✗	for (x = 0; x < h / 2; x++)
3604		✗	memcpy(track->audio.buf + x * 2 * w + y * cfs,
3605		✗	data + x * cfs, cfs);
3606		✗	} else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3607		✗	if (size < w) {
3608		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3609			"Corrupt sipr RM-style audio packet size\n");
3610		✗	return AVERROR_INVALIDDATA;
3611			}
3612		✗	memcpy(track->audio.buf + y * w, data, w);
3613			} else {
3614		✗	if (size < w) {
3615		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3616			"Corrupt generic RM-style audio packet size\n");
3617		✗	return AVERROR_INVALIDDATA;
3618			}
3619		✗	for (x = 0; x < w / sps; x++)
3620		✗	memcpy(track->audio.buf +
3621		✗	sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3622		✗	data + x * sps, sps);
3623			}
3624
3625		✗	if (++track->audio.sub_packet_cnt >= h) {
3626		✗	if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3627		✗	ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3628		✗	track->audio.sub_packet_cnt = 0;
3629		✗	track->audio.pkt_cnt = h * w / a;
3630			}
3631			}
3632
3633		✗	while (track->audio.pkt_cnt) {
3634			int ret;
3635		✗	AVPacket *pkt = matroska->pkt;
3636
3637		✗	ret = av_new_packet(pkt, a);
3638		✗	if (ret < 0) {
3639		✗	return ret;
3640			}
3641		✗	memcpy(pkt->data,
3642		✗	track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3643			a);
3644		✗	pkt->pts = track->audio.buf_timecode;
3645		✗	track->audio.buf_timecode = AV_NOPTS_VALUE;
3646		✗	pkt->pos = pos;
3647		✗	pkt->stream_index = st->index;
3648		✗	ret = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3649		✗	if (ret < 0) {
3650		✗	av_packet_unref(pkt);
3651		✗	return AVERROR(ENOMEM);
3652			}
3653			}
3654
3655		✗	return 0;
3656			}
3657
3658			/* reconstruct full wavpack blocks from mangled matroska ones */
3659		24	static int matroska_parse_wavpack(MatroskaTrack *track,
3660			uint8_t **data, int *size)
3661			{
3662		24	uint8_t *dst = NULL;
3663		24	uint8_t *src = *data;
3664		24	int dstlen = 0;
3665		24	int srclen = *size;
3666			uint32_t samples;
3667			uint16_t ver;
3668		24	int ret, offset = 0;
3669
3670	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (srclen < 12)
3671		✗	return AVERROR_INVALIDDATA;
3672
3673			av_assert1(track->stream->codecpar->extradata_size >= 2);
3674		24	ver = AV_RL16(track->stream->codecpar->extradata);
3675
3676		24	samples = AV_RL32(src);
3677		24	src += 4;
3678		24	srclen -= 4;
3679
3680	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 24 times.	136	while (srclen >= 8) {
3681			int multiblock;
3682			uint32_t blocksize;
3683			uint8_t *tmp;
3684
3685		112	uint32_t flags = AV_RL32(src);
3686		112	uint32_t crc = AV_RL32(src + 4);
3687		112	src += 8;
3688		112	srclen -= 8;
3689
3690		112	multiblock = (flags & 0x1800) != 0x1800;
3691	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 2 times.	112	if (multiblock) {
3692	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 110 times.	110	if (srclen < 4) {
3693		✗	ret = AVERROR_INVALIDDATA;
3694		✗	goto fail;
3695			}
3696		110	blocksize = AV_RL32(src);
3697		110	src += 4;
3698		110	srclen -= 4;
3699			} else
3700		2	blocksize = srclen;
3701
3702	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (blocksize > srclen) {
3703		✗	ret = AVERROR_INVALIDDATA;
3704		✗	goto fail;
3705			}
3706
3707		112	tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3708	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (!tmp) {
3709		✗	ret = AVERROR(ENOMEM);
3710		✗	goto fail;
3711			}
3712		112	dst = tmp;
3713		112	dstlen += blocksize + 32;
3714
3715		112	AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3716		112	AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3717		112	AV_WL16(dst + offset + 8, ver); // version
3718		112	AV_WL16(dst + offset + 10, 0); // track/index_no
3719		112	AV_WL32(dst + offset + 12, 0); // total samples
3720		112	AV_WL32(dst + offset + 16, 0); // block index
3721		112	AV_WL32(dst + offset + 20, samples); // number of samples
3722		112	AV_WL32(dst + offset + 24, flags); // flags
3723		112	AV_WL32(dst + offset + 28, crc); // crc
3724		112	memcpy(dst + offset + 32, src, blocksize); // block data
3725
3726		112	src += blocksize;
3727		112	srclen -= blocksize;
3728		112	offset += blocksize + 32;
3729			}
3730
3731		24	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3732
3733		24	*data = dst;
3734		24	*size = dstlen;
3735
3736		24	return 0;
3737
3738		✗	fail:
3739		✗	av_freep(&dst);
3740		✗	return ret;
3741			}
3742
3743		11	static int matroska_parse_prores(MatroskaTrack *track,
3744			uint8_t **data, int *size)
3745			{
3746			uint8_t *dst;
3747		11	int dstlen = *size + 8;
3748
3749		11	dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3750	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (!dst)
3751		✗	return AVERROR(ENOMEM);
3752
3753		11	AV_WB32(dst, dstlen);
3754		11	AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3755		11	memcpy(dst + 8, *data, dstlen - 8);
3756		11	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3757
3758		11	*data = dst;
3759		11	*size = dstlen;
3760
3761		11	return 0;
3762			}
3763
3764		90	static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3765			MatroskaTrack *track,
3766			AVStream *st,
3767			uint8_t *data, int data_len,
3768			uint64_t timecode,
3769			uint64_t duration,
3770			int64_t pos)
3771			{
3772		90	AVPacket *pkt = matroska->pkt;
3773			uint8_t *id, *settings, *text, *buf;
3774			int id_len, settings_len, text_len;
3775			uint8_t *p, *q;
3776			int err;
3777
3778	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (data_len <= 0)
3779		✗	return AVERROR_INVALIDDATA;
3780
3781		90	p = data;
3782		90	q = data + data_len;
3783
3784		90	id = p;
3785		90	id_len = -1;
3786	1/2 ✓ Branch 0 taken 192 times. ✗ Branch 1 not taken.	192	while (p < q) {
3787	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') {
3788		90	id_len = p - id;
3789	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3790		✗	p++;
3791		90	break;
3792			}
3793		102	p++;
3794			}
3795
3796	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')
3797		✗	return AVERROR_INVALIDDATA;
3798		90	p++;
3799
3800		90	settings = p;
3801		90	settings_len = -1;
3802	1/2 ✓ Branch 0 taken 546 times. ✗ Branch 1 not taken.	546	while (p < q) {
3803	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') {
3804		90	settings_len = p - settings;
3805	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3806		✗	p++;
3807		90	break;
3808			}
3809		456	p++;
3810			}
3811
3812	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')
3813		✗	return AVERROR_INVALIDDATA;
3814		90	p++;
3815
3816		90	text = p;
3817		90	text_len = q - p;
3818	1/2 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken.	90	while (text_len > 0) {
3819		90	const int len = text_len - 1;
3820		90	const uint8_t c = p[len];
3821	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')
3822		90	break;
3823		✗	text_len = len;
3824			}
3825
3826	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (text_len <= 0)
3827		✗	return AVERROR_INVALIDDATA;
3828
3829		90	err = av_new_packet(pkt, text_len);
3830	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3831		✗	return err;
3832			}
3833
3834		90	memcpy(pkt->data, text, text_len);
3835
3836	2/2 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 78 times.	90	if (id_len > 0) {
3837		12	buf = av_packet_new_side_data(pkt,
3838			AV_PKT_DATA_WEBVTT_IDENTIFIER,
3839			id_len);
3840	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!buf) {
3841		✗	av_packet_unref(pkt);
3842		✗	return AVERROR(ENOMEM);
3843			}
3844		12	memcpy(buf, id, id_len);
3845			}
3846
3847	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 66 times.	90	if (settings_len > 0) {
3848		24	buf = av_packet_new_side_data(pkt,
3849			AV_PKT_DATA_WEBVTT_SETTINGS,
3850			settings_len);
3851	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (!buf) {
3852		✗	av_packet_unref(pkt);
3853		✗	return AVERROR(ENOMEM);
3854			}
3855		24	memcpy(buf, settings, settings_len);
3856			}
3857
3858			// Do we need this for subtitles?
3859			// pkt->flags = AV_PKT_FLAG_KEY;
3860
3861		90	pkt->stream_index = st->index;
3862		90	pkt->pts = timecode;
3863
3864			// Do we need this for subtitles?
3865			// pkt->dts = timecode;
3866
3867		90	pkt->duration = duration;
3868		90	pkt->pos = pos;
3869
3870		90	err = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3871	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3872		✗	av_packet_unref(pkt);
3873		✗	return AVERROR(ENOMEM);
3874			}
3875
3876		90	return 0;
3877			}
3878
3879		136	static int matroska_parse_block_additional(MatroskaDemuxContext *matroska,
3880			MatroskaTrack *track, AVPacket *pkt,
3881			const uint8_t *data, int size, uint64_t id)
3882			{
3883		136	const EbmlList *mappings_list = &track->block_addition_mappings;
3884		136	MatroskaBlockAdditionMapping *mappings = mappings_list->elem, *mapping = NULL;
3885			uint8_t *side_data;
3886			int res;
3887
3888	4/6 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 124 times. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 12 times.	136	if (!matroska->is_webm && track->max_block_additional_id && id > track->max_block_additional_id) {
3889		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
3890		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
3891			"BlockAddID %"PRIu64" is higher than the reported MaxBlockAdditionID %"PRIu64" "
3892			"for Track with TrackNumber %"PRIu64"\n", id, track->max_block_additional_id,
3893			track->num);
3894		✗	if (strict)
3895		✗	return AVERROR_INVALIDDATA;
3896			}
3897
3898	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 134 times.	136	for (int i = 0; i < mappings_list->nb_elem; i++) {
3899	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (id != mappings[i].value)
3900		✗	continue;
3901		2	mapping = &mappings[i];
3902		2	break;
3903			}
3904
3905	5/6 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 130 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 4 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	136	if (id != 1 && !matroska->is_webm && !mapping) {
3906		✗	av_log(matroska->ctx, AV_LOG_WARNING, "BlockAddID %"PRIu64" has no mapping. Skipping\n", id);
3907		✗	return 0;
3908			}
3909
3910	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 134 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	136	if (mapping && mapping->type)
3911		2	id = mapping->type;
3912
3913	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 130 times.	136	switch (id) {
3914		6	case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35: {
3915			GetByteContext bc;
3916			int country_code, provider_code;
3917			int provider_oriented_code, application_identifier;
3918			size_t hdrplus_size;
3919			AVDynamicHDRPlus *hdrplus;
3920
3921	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (size < 6)
3922		✗	break; //ignore
3923
3924		6	bytestream2_init(&bc, data, size);
3925
3926			/* ITU-T T.35 metadata */
3927		6	country_code = bytestream2_get_byteu(&bc);
3928		6	provider_code = bytestream2_get_be16u(&bc);
3929
3930	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 ||
3931			provider_code != ITU_T_T35_PROVIDER_CODE_SMTPE)
3932			break; // ignore
3933
3934		6	provider_oriented_code = bytestream2_get_be16u(&bc);
3935		6	application_identifier = bytestream2_get_byteu(&bc);
3936
3937	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)
3938			break; // ignore
3939
3940		6	hdrplus = av_dynamic_hdr_plus_alloc(&hdrplus_size);
3941	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!hdrplus)
3942		6	return AVERROR(ENOMEM);
3943
3944	1/2 ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken.	6	if ((res = av_dynamic_hdr_plus_from_t35(hdrplus, bc.buffer,
3945	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times.	12	bytestream2_get_bytes_left(&bc))) < 0 ||
3946		6	(res = av_packet_add_side_data(pkt, AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
3947			(uint8_t *)hdrplus, hdrplus_size)) < 0) {
3948		✗	av_free(hdrplus);
3949		✗	return res;
3950			}
3951
3952		6	return 0;
3953			}
3954		130	default:
3955		130	break;
3956			}
3957
3958		130	side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3959			size + (size_t)8);
3960	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 130 times.	130	if (!side_data)
3961		✗	return AVERROR(ENOMEM);
3962
3963		130	AV_WB64(side_data, id);
3964		130	memcpy(side_data + 8, data, size);
3965
3966		130	return 0;
3967			}
3968
3969		30142	static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3970			MatroskaTrack *track, AVStream *st,
3971			AVBufferRef *buf, uint8_t *data, int pkt_size,
3972			uint64_t timecode, uint64_t lace_duration,
3973			int64_t pos, int is_keyframe,
3974			MatroskaBlockMore *blockmore, int nb_blockmore,
3975			int64_t discard_padding)
3976			{
3977		30142	uint8_t *pkt_data = data;
3978		30142	int res = 0;
3979		30142	AVPacket *pkt = matroska->pkt;
3980
3981	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 30118 times.	30142	if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3982		24	res = matroska_parse_wavpack(track, &pkt_data, &pkt_size);
3983	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (res < 0) {
3984		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3985			"Error parsing a wavpack block.\n");
3986		✗	goto fail;
3987			}
3988	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (!buf)
3989		2	av_freep(&data);
3990		24	buf = NULL;
3991			}
3992
3993	2/2 ✓ Branch 0 taken 13 times. ✓ Branch 1 taken 30129 times.	30142	if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3994	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 2 times.	13	AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
3995		11	res = matroska_parse_prores(track, &pkt_data, &pkt_size);
3996	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (res < 0) {
3997		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3998			"Error parsing a prores block.\n");
3999		✗	goto fail;
4000			}
4001	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 9 times.	11	if (!buf)
4002		2	av_freep(&data);
4003		11	buf = NULL;
4004			}
4005
4006	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 30142 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	30142	if (!pkt_size && !nb_blockmore)
4007		✗	goto no_output;
4008
4009	5/6 ✓ Branch 0 taken 26921 times. ✓ Branch 1 taken 3221 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 26909 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 12 times.	30142	if (!matroska->is_webm && nb_blockmore && !track->max_block_additional_id) {
4010		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
4011		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
4012			"Unexpected BlockAdditions found in a Block from Track with TrackNumber %"PRIu64" "
4013			"where MaxBlockAdditionID is 0\n", track->num);
4014		✗	if (strict) {
4015		✗	res = AVERROR_INVALIDDATA;
4016		✗	goto fail;
4017			}
4018			}
4019
4020	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 30030 times.	30142	if (!buf)
4021		112	pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
4022			NULL, NULL, 0);
4023			else
4024		30030	pkt->buf = av_buffer_ref(buf);
4025
4026	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30142 times.	30142	if (!pkt->buf) {
4027		✗	res = AVERROR(ENOMEM);
4028		✗	goto fail;
4029			}
4030
4031		30142	pkt->data = pkt_data;
4032		30142	pkt->size = pkt_size;
4033		30142	pkt->flags = is_keyframe;
4034		30142	pkt->stream_index = st->index;
4035
4036	2/2 ✓ Branch 0 taken 136 times. ✓ Branch 1 taken 30142 times.	30278	for (int i = 0; i < nb_blockmore; i++) {
4037		136	MatroskaBlockMore *more = &blockmore[i];
4038
4039	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 136 times.	136	if (!more->additional.size)
4040		✗	continue;
4041
4042		136	res = matroska_parse_block_additional(matroska, track, pkt, more->additional.data,
4043			more->additional.size, more->additional_id);
4044	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 136 times.	136	if (res < 0) {
4045		✗	av_packet_unref(pkt);
4046		✗	return res;
4047			}
4048			}
4049
4050	2/2 ✓ Branch 0 taken 27 times. ✓ Branch 1 taken 30115 times.	30142	if (discard_padding) {
4051		27	uint8_t *side_data = av_packet_new_side_data(pkt,
4052			AV_PKT_DATA_SKIP_SAMPLES,
4053			10);
4054	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 27 times.	27	if (!side_data) {
4055		✗	av_packet_unref(pkt);
4056		✗	return AVERROR(ENOMEM);
4057			}
4058		27	discard_padding = av_rescale_q(discard_padding,
4059		27	(AVRational){1, 1000000000},
4060		27	(AVRational){1, st->codecpar->sample_rate});
4061	1/2 ✓ Branch 0 taken 27 times. ✗ Branch 1 not taken.	27	if (discard_padding > 0) {
4062		27	AV_WL32A(side_data + 4, discard_padding);
4063			} else {
4064		✗	AV_WL32A(side_data, -discard_padding);
4065			}
4066			}
4067
4068	2/2 ✓ Branch 0 taken 435 times. ✓ Branch 1 taken 29707 times.	30142	if (track->ms_compat)
4069		435	pkt->dts = timecode;
4070			else
4071		29707	pkt->pts = timecode;
4072		30142	pkt->pos = pos;
4073		30142	pkt->duration = lace_duration;
4074
4075		30142	res = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
4076	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30142 times.	30142	if (res < 0) {
4077		✗	av_packet_unref(pkt);
4078		✗	return AVERROR(ENOMEM);
4079			}
4080
4081		30142	return 0;
4082
4083		✗	no_output:
4084		✗	fail:
4085		✗	if (!buf)
4086		✗	av_free(pkt_data);
4087		✗	return res;
4088			}
4089
4090		30715	static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
4091			int size, int64_t pos, uint64_t cluster_time,
4092			uint64_t block_duration, int is_keyframe,
4093			MatroskaBlockMore *blockmore, int nb_blockmore,
4094			int64_t cluster_pos, int64_t discard_padding)
4095			{
4096		30715	uint64_t timecode = AV_NOPTS_VALUE;
4097			MatroskaTrack *track;
4098			FFIOContext pb;
4099		30715	int res = 0;
4100			AVStream *st;
4101			int16_t block_time;
4102			uint32_t lace_size[256];
4103		30715	int n, flags, laces = 0;
4104			uint64_t num;
4105			int trust_default_duration;
4106
4107			av_assert1(buf);
4108
4109		30715	ffio_init_read_context(&pb, data, size);
4110
4111	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 30715 times.	30715	if ((n = ebml_read_num(matroska, &pb.pub, 8, &num, 1)) < 0)
4112		✗	return n;
4113		30715	data += n;
4114		30715	size -= n;
4115
4116		30715	track = matroska_find_track_by_num(matroska, num);
4117	3/4 ✓ Branch 0 taken 30714 times. ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 30714 times.	30715	if (!track || size < 3)
4118		1	return AVERROR_INVALIDDATA;
4119
4120	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30714 times.	30714	if (!(st = track->stream)) {
4121		✗	av_log(matroska->ctx, AV_LOG_VERBOSE,
4122			"No stream associated to TrackNumber %"PRIu64". "
4123			"Ignoring Block with this TrackNumber.\n", num);
4124		✗	return 0;
4125			}
4126
4127	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 30403 times.	30714	if (st->discard >= AVDISCARD_ALL)
4128		311	return res;
4129	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30403 times.	30403	if (block_duration > INT64_MAX)
4130		✗	block_duration = INT64_MAX;
4131
4132		30403	block_time = sign_extend(AV_RB16(data), 16);
4133		30403	data += 2;
4134		30403	flags = *data++;
4135		30403	size -= 3;
4136	2/2 ✓ Branch 0 taken 29962 times. ✓ Branch 1 taken 441 times.	30403	if (is_keyframe == -1)
4137		29962	is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
4138
4139	3/4 ✓ Branch 0 taken 30403 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 79 times. ✓ Branch 3 taken 30324 times.	30403	if (cluster_time != (uint64_t) -1 &&
4140	2/2 ✓ Branch 0 taken 63 times. ✓ Branch 1 taken 16 times.	79	(block_time >= 0 || cluster_time >= -block_time)) {
4141		30387	uint64_t timecode_cluster_in_track_tb = (double) cluster_time / track->time_scale;
4142		30387	timecode = timecode_cluster_in_track_tb + block_time - track->codec_delay_in_track_tb;
4143	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 30259 times.	30387	if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
4144	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 122 times.	128	timecode < track->end_timecode)
4145		6	is_keyframe = 0; /* overlapping subtitles are not key frame */
4146	2/2 ✓ Branch 0 taken 26804 times. ✓ Branch 1 taken 3583 times.	30387	if (is_keyframe) {
4147		26804	ff_reduce_index(matroska->ctx, st->index);
4148		26804	av_add_index_entry(st, cluster_pos, timecode, 0, 0,
4149			AVINDEX_KEYFRAME);
4150			}
4151			}
4152
4153	2/2 ✓ Branch 0 taken 593 times. ✓ Branch 1 taken 29810 times.	30403	if (matroska->skip_to_keyframe &&
4154	1/2 ✓ Branch 0 taken 593 times. ✗ Branch 1 not taken.	593	track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
4155			// Compare signed timecodes. Timecode may be negative due to codec delay
4156			// offset. We don't support timestamps greater than int64_t anyway - see
4157			// AVPacket's pts.
4158	2/2 ✓ Branch 0 taken 548 times. ✓ Branch 1 taken 45 times.	593	if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
4159		548	return res;
4160	1/2 ✓ Branch 0 taken 45 times. ✗ Branch 1 not taken.	45	if (is_keyframe)
4161		45	matroska->skip_to_keyframe = 0;
4162		✗	else if (!ffstream(st)->skip_to_keyframe) {
4163		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
4164		✗	matroska->skip_to_keyframe = 0;
4165			}
4166			}
4167
4168		29855	res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
4169			&pb.pub, lace_size, &laces);
4170	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29855 times.	29855	if (res < 0) {
4171		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing frame sizes.\n");
4172		✗	return res;
4173			}
4174
4175		29855	trust_default_duration = track->default_duration != 0;
4176	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 29855 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	29855	if (track->audio.samplerate == 8000 && trust_default_duration) {
4177			// If this is needed for more codecs, then add them here
4178		✗	if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
4179		✗	if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
4180		✗	trust_default_duration = 0;
4181			}
4182			}
4183
4184	4/4 ✓ Branch 0 taken 29577 times. ✓ Branch 1 taken 278 times. ✓ Branch 2 taken 4254 times. ✓ Branch 3 taken 25323 times.	29855	if (!block_duration && trust_default_duration)
4185		4254	block_duration = track->default_duration * laces / matroska->time_scale;
4186
4187	5/6 ✓ Branch 0 taken 29855 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 76 times. ✓ Branch 3 taken 29779 times. ✓ Branch 4 taken 60 times. ✓ Branch 5 taken 16 times.	29855	if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
4188		29839	track->end_timecode =
4189		29839	FFMAX(track->end_timecode, timecode + block_duration);
4190
4191	2/2 ✓ Branch 0 taken 30232 times. ✓ Branch 1 taken 29855 times.	60087	for (n = 0; n < laces; n++) {
4192		30232	int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
4193		30232	uint8_t *out_data = data;
4194		30232	int out_size = lace_size[n];
4195
4196	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 30151 times.	30232	if (track->needs_decoding) {
4197		81	res = matroska_decode_buffer(&out_data, &out_size, track);
4198	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 81 times.	81	if (res < 0)
4199		✗	return res;
4200			/* Given that we are here means that out_data is no longer
4201			* owned by buf, so set it to NULL. This depends upon
4202			* zero-length header removal compression being ignored. */
4203			av_assert1(out_data != data);
4204		81	buf = NULL;
4205			}
4206
4207	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30232 times.	30232	if (track->audio.buf) {
4208		✗	res = matroska_parse_rm_audio(matroska, track, st,
4209			out_data, out_size,
4210			timecode, pos);
4211		✗	if (!buf)
4212		✗	av_free(out_data);
4213		✗	if (res)
4214		✗	return res;
4215	2/2 ✓ Branch 0 taken 90 times. ✓ Branch 1 taken 30142 times.	30232	} else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
4216		90	res = matroska_parse_webvtt(matroska, track, st,
4217			out_data, out_size,
4218			timecode, lace_duration,
4219			pos);
4220	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (!buf)
4221		✗	av_free(out_data);
4222	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (res)
4223		✗	return res;
4224			} else {
4225	2/2 ✓ Branch 0 taken 29765 times. ✓ Branch 1 taken 377 times.	30142	res = matroska_parse_frame(matroska, track, st, buf, out_data,
4226			out_size, timecode, lace_duration,
4227			pos, !n ? is_keyframe : 0,
4228			blockmore, nb_blockmore,
4229			discard_padding);
4230	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30142 times.	30142	if (res)
4231		✗	return res;
4232			}
4233
4234	2/2 ✓ Branch 0 taken 30144 times. ✓ Branch 1 taken 88 times.	30232	if (timecode != AV_NOPTS_VALUE)
4235	2/2 ✓ Branch 0 taken 4821 times. ✓ Branch 1 taken 25323 times.	30144	timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
4236		30232	data += lace_size[n];
4237			}
4238
4239		29855	return 0;
4240			}
4241
4242		31114	static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
4243			{
4244		31114	MatroskaCluster *cluster = &matroska->current_cluster;
4245		31114	MatroskaBlock *block = &cluster->block;
4246			int res;
4247
4248	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31114 times.	31114	av_assert0(matroska->num_levels <= 2U);
4249
4250	2/2 ✓ Branch 0 taken 1142 times. ✓ Branch 1 taken 29972 times.	31114	if (matroska->num_levels == 1) {
4251		1142	res = ebml_parse(matroska, matroska_segment, NULL);
4252
4253	2/2 ✓ Branch 0 taken 799 times. ✓ Branch 1 taken 343 times.	1142	if (res == 1) {
4254			/* Found a cluster: subtract the size of the ID already read. */
4255		799	cluster->pos = avio_tell(matroska->ctx->pb) - 4;
4256
4257		799	res = ebml_parse(matroska, matroska_cluster_enter, cluster);
4258	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 799 times.	799	if (res < 0)
4259		✗	return res;
4260			}
4261			}
4262
4263	2/2 ✓ Branch 0 taken 30730 times. ✓ Branch 1 taken 384 times.	31114	if (matroska->num_levels == 2) {
4264			/* We are inside a cluster. */
4265		30730	res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
4266
4267	4/4 ✓ Branch 0 taken 30720 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 30715 times. ✓ Branch 3 taken 5 times.	30730	if (res >= 0 && block->bin.size > 0) {
4268	2/2 ✓ Branch 0 taken 482 times. ✓ Branch 1 taken 30233 times.	30715	int is_keyframe = block->non_simple ? block->reference.count == 0 : -1;
4269
4270		30715	res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
4271			block->bin.size, block->bin.pos,
4272			cluster->timecode, block->duration,
4273		30715	is_keyframe, block->blockmore.elem,
4274			block->blockmore.nb_elem, cluster->pos,
4275			block->discard_padding);
4276			}
4277
4278		30730	ebml_free(matroska_blockgroup, block);
4279		30730	memset(block, 0, sizeof(*block));
4280	2/2 ✓ Branch 0 taken 356 times. ✓ Branch 1 taken 28 times.	384	} else if (!matroska->num_levels) {
4281	2/2 ✓ Branch 1 taken 349 times. ✓ Branch 2 taken 7 times.	356	if (!avio_feof(matroska->ctx->pb)) {
4282		349	avio_r8(matroska->ctx->pb);
4283	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 349 times.	349	if (!avio_feof(matroska->ctx->pb)) {
4284		✗	av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
4285			"end of segment.\n");
4286		✗	return AVERROR_INVALIDDATA;
4287			}
4288			}
4289		356	matroska->done = 1;
4290		356	return AVERROR_EOF;
4291			}
4292
4293		30758	return res;
4294			}
4295
4296		29867	static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
4297			{
4298		29867	MatroskaDemuxContext *matroska = s->priv_data;
4299		29867	int ret = 0;
4300
4301	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 29857 times.	29867	if (matroska->resync_pos == -1) {
4302			// This can only happen if generic seeking has been used.
4303		10	matroska->resync_pos = avio_tell(s->pb);
4304			}
4305
4306	2/2 ✓ Branch 1 taken 30723 times. ✓ Branch 2 taken 29485 times.	60208	while (matroska_deliver_packet(matroska, pkt)) {
4307	2/2 ✓ Branch 0 taken 382 times. ✓ Branch 1 taken 30341 times.	30723	if (matroska->done)
4308	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 372 times.	382	return (ret < 0) ? ret : AVERROR_EOF;
4309	4/4 ✓ Branch 1 taken 343 times. ✓ Branch 2 taken 29998 times. ✓ Branch 3 taken 13 times. ✓ Branch 4 taken 330 times.	30341	if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
4310		13	ret = matroska_resync(matroska, matroska->resync_pos);
4311			}
4312
4313		29485	return 0;
4314			}
4315
4316		55	static int matroska_read_seek(AVFormatContext *s, int stream_index,
4317			int64_t timestamp, int flags)
4318			{
4319		55	MatroskaDemuxContext *matroska = s->priv_data;
4320		55	MatroskaTrack *tracks = NULL;
4321		55	AVStream *st = s->streams[stream_index];
4322		55	FFStream *const sti = ffstream(st);
4323			int i, index;
4324
4325			/* Parse the CUES now since we need the index data to seek. */
4326	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 52 times.	55	if (matroska->cues_parsing_deferred > 0) {
4327		3	matroska->cues_parsing_deferred = 0;
4328		3	matroska_parse_cues(matroska);
4329			}
4330
4331	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 55 times.	55	if (!sti->nb_index_entries)
4332		✗	goto err;
4333		55	timestamp = FFMAX(timestamp, sti->index_entries[0].timestamp);
4334
4335	2/2 ✓ Branch 1 taken 45 times. ✓ Branch 2 taken 10 times.	55	if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4336	2/2 ✓ Branch 0 taken 17 times. ✓ Branch 1 taken 28 times.	45	index == sti->nb_index_entries - 1) {
4337		27	matroska_reset_status(matroska, 0, sti->index_entries[sti->nb_index_entries - 1].pos);
4338	2/2 ✓ Branch 1 taken 285 times. ✓ Branch 2 taken 410 times.	695	while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4339	2/2 ✓ Branch 0 taken 409 times. ✓ Branch 1 taken 1 times.	410	index == sti->nb_index_entries - 1) {
4340		694	matroska_clear_queue(matroska);
4341	2/2 ✓ Branch 1 taken 26 times. ✓ Branch 2 taken 668 times.	694	if (matroska_parse_cluster(matroska) < 0)
4342		26	break;
4343			}
4344			}
4345
4346		55	matroska_clear_queue(matroska);
4347	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 &&
4348	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	index == sti->nb_index_entries - 1))
4349		10	goto err;
4350
4351		45	tracks = matroska->tracks.elem;
4352	2/2 ✓ Branch 0 taken 69 times. ✓ Branch 1 taken 45 times.	114	for (i = 0; i < matroska->tracks.nb_elem; i++) {
4353		69	tracks[i].audio.pkt_cnt = 0;
4354		69	tracks[i].audio.sub_packet_cnt = 0;
4355		69	tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
4356		69	tracks[i].end_timecode = 0;
4357			}
4358
4359			/* We seek to a level 1 element, so set the appropriate status. */
4360		45	matroska_reset_status(matroska, 0, sti->index_entries[index].pos);
4361	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (flags & AVSEEK_FLAG_ANY) {
4362		✗	sti->skip_to_keyframe = 0;
4363		✗	matroska->skip_to_timecode = timestamp;
4364			} else {
4365		45	sti->skip_to_keyframe = 1;
4366		45	matroska->skip_to_timecode = sti->index_entries[index].timestamp;
4367			}
4368		45	matroska->skip_to_keyframe = 1;
4369		45	matroska->done = 0;
4370		45	avpriv_update_cur_dts(s, st, sti->index_entries[index].timestamp);
4371		45	return 0;
4372		10	err:
4373			// slightly hackish but allows proper fallback to
4374			// the generic seeking code.
4375		10	matroska_reset_status(matroska, 0, -1);
4376		10	matroska->resync_pos = -1;
4377		10	matroska_clear_queue(matroska);
4378		10	sti->skip_to_keyframe =
4379		10	matroska->skip_to_keyframe = 0;
4380		10	matroska->done = 0;
4381		10	return -1;
4382			}
4383
4384		369	static int matroska_read_close(AVFormatContext *s)
4385			{
4386		369	MatroskaDemuxContext *matroska = s->priv_data;
4387		369	MatroskaTrack *tracks = matroska->tracks.elem;
4388			int n;
4389
4390		369	matroska_clear_queue(matroska);
4391
4392	2/2 ✓ Branch 0 taken 440 times. ✓ Branch 1 taken 369 times.	809	for (n = 0; n < matroska->tracks.nb_elem; n++)
4393	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 356 times.	440	if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
4394		84	av_freep(&tracks[n].audio.buf);
4395		369	ebml_free(matroska_segment, matroska);
4396
4397		369	return 0;
4398			}
4399
4400			#if CONFIG_WEBM_DASH_MANIFEST_DEMUXER
4401			typedef struct {
4402			int64_t start_time_ns;
4403			int64_t end_time_ns;
4404			int64_t start_offset;
4405			int64_t end_offset;
4406			} CueDesc;
4407
4408			/* This function searches all the Cues and returns the CueDesc corresponding to
4409			* the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
4410			* end_time_ns. All 4 fields will be set to -1 if ts >= file's duration or
4411			* if an error occurred.
4412			*/
4413		4051	static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
4414		4051	MatroskaDemuxContext *matroska = s->priv_data;
4415		4051	FFStream *const sti = ffstream(s->streams[0]);
4416		4051	AVIndexEntry *const index_entries = sti->index_entries;
4417		4051	int nb_index_entries = sti->nb_index_entries;
4418			CueDesc cue_desc;
4419			int i;
4420
4421	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 3950 times.	4051	if (ts >= (int64_t)(matroska->duration * matroska->time_scale))
4422		101	return (CueDesc) {-1, -1, -1, -1};
4423	2/2 ✓ Branch 0 taken 45235 times. ✓ Branch 1 taken 156 times.	45391	for (i = 1; i < nb_index_entries; i++) {
4424	1/2 ✓ Branch 0 taken 45235 times. ✗ Branch 1 not taken.	45235	if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
4425	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 41441 times.	45235	index_entries[i].timestamp * matroska->time_scale > ts) {
4426		3794	break;
4427			}
4428			}
4429		3950	--i;
4430	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3950 times.	3950	if (index_entries[i].timestamp > matroska->duration)
4431		✗	return (CueDesc) {-1, -1, -1, -1};
4432		3950	cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
4433		3950	cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
4434	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 156 times.	3950	if (i != nb_index_entries - 1) {
4435		3794	cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
4436		3794	cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
4437			} else {
4438		156	cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
4439			// FIXME: this needs special handling for files where Cues appear
4440			// before Clusters. the current logic assumes Cues appear after
4441			// Clusters.
4442		156	cue_desc.end_offset = cues_start - matroska->segment_start;
4443			}
4444		3950	return cue_desc;
4445			}
4446
4447		10	static int webm_clusters_start_with_keyframe(AVFormatContext *s)
4448			{
4449		10	MatroskaDemuxContext *matroska = s->priv_data;
4450		10	AVStream *const st = s->streams[0];
4451		10	FFStream *const sti = ffstream(st);
4452		10	uint32_t id = matroska->current_id;
4453			int64_t cluster_pos, before_pos;
4454		10	int index, rv = 1;
4455
4456	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (sti->nb_index_entries <= 0)
4457		✗	return 0;
4458
4459			// seek to the first cluster using cues.
4460		10	index = av_index_search_timestamp(st, 0, 0);
4461	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (index < 0)
4462		✗	return 0;
4463		10	cluster_pos = sti->index_entries[index].pos;
4464		10	before_pos = avio_tell(s->pb);
4465		78	while (1) {
4466			uint64_t cluster_id, cluster_length;
4467			int read;
4468			AVPacket *pkt;
4469		88	avio_seek(s->pb, cluster_pos, SEEK_SET);
4470			// read cluster id and length
4471		88	read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
4472	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
4473			break;
4474		79	read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
4475	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 79 times.	79	if (read < 0)
4476		✗	break;
4477
4478		79	matroska_reset_status(matroska, 0, cluster_pos);
4479		79	matroska_clear_queue(matroska);
4480	1/2 ✓ Branch 1 taken 79 times. ✗ Branch 2 not taken.	79	if (matroska_parse_cluster(matroska) < 0 ||
4481	1/2 ✓ Branch 0 taken 79 times. ✗ Branch 1 not taken.	79	!matroska->queue.head) {
4482			break;
4483			}
4484		79	pkt = &matroska->queue.head->pkt;
4485			// 4 + read is the length of the cluster id and the cluster length field.
4486		79	cluster_pos += 4 + read + cluster_length;
4487	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 78 times.	79	if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
4488		1	rv = 0;
4489		1	break;
4490			}
4491			}
4492
4493			/* Restore the status after matroska_read_header: */
4494		10	matroska_reset_status(matroska, id, before_pos);
4495
4496		10	return rv;
4497			}
4498
4499		555	static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
4500			double min_buffer, double* buffer,
4501			double* sec_to_download, AVFormatContext *s,
4502			int64_t cues_start)
4503			{
4504		555	double nano_seconds_per_second = 1000000000.0;
4505		555	double time_sec = time_ns / nano_seconds_per_second;
4506		555	int rv = 0;
4507		555	int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
4508		555	int64_t end_time_ns = time_ns + time_to_search_ns;
4509		555	double sec_downloaded = 0.0;
4510		555	CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
4511	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (desc_curr.start_time_ns == -1)
4512		✗	return -1;
4513		555	*sec_to_download = 0.0;
4514
4515			// Check for non cue start time.
4516	2/2 ✓ Branch 0 taken 513 times. ✓ Branch 1 taken 42 times.	555	if (time_ns > desc_curr.start_time_ns) {
4517		513	int64_t cue_nano = desc_curr.end_time_ns - time_ns;
4518		513	double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
4519		513	double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
4520		513	double timeToDownload = (cueBytes * 8.0) / bps;
4521
4522		513	sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
4523		513	*sec_to_download += timeToDownload;
4524
4525			// Check if the search ends within the first cue.
4526	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 513 times.	513	if (desc_curr.end_time_ns >= end_time_ns) {
4527		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4528		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4529		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4530		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4531			}
4532
4533	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 509 times.	513	if ((sec_downloaded + *buffer) <= min_buffer) {
4534		4	return 1;
4535			}
4536
4537			// Get the next Cue.
4538		509	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4539			}
4540
4541	2/2 ✓ Branch 0 taken 2856 times. ✓ Branch 1 taken 100 times.	2956	while (desc_curr.start_time_ns != -1) {
4542		2856	int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
4543		2856	int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
4544		2856	double desc_sec = desc_ns / nano_seconds_per_second;
4545		2856	double bits = (desc_bytes * 8.0);
4546		2856	double time_to_download = bits / bps;
4547
4548		2856	sec_downloaded += desc_sec - time_to_download;
4549		2856	*sec_to_download += time_to_download;
4550
4551	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2856 times.	2856	if (desc_curr.end_time_ns >= end_time_ns) {
4552		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4553		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4554		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4555		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4556
4557		✗	if ((sec_downloaded + *buffer) <= min_buffer)
4558		✗	rv = 1;
4559		✗	break;
4560			}
4561
4562	2/2 ✓ Branch 0 taken 451 times. ✓ Branch 1 taken 2405 times.	2856	if ((sec_downloaded + *buffer) <= min_buffer) {
4563		451	rv = 1;
4564		451	break;
4565			}
4566
4567		2405	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4568			}
4569		551	*buffer = *buffer + sec_downloaded;
4570		551	return rv;
4571			}
4572
4573			/* This function computes the bandwidth of the WebM file with the help of
4574			* buffer_size_after_time_downloaded() function. Both of these functions are
4575			* adapted from WebM Tools project and are adapted to work with FFmpeg's
4576			* Matroska parsing mechanism.
4577			*
4578			* Returns the bandwidth of the file on success; -1 on error.
4579			* */
4580		10	static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4581			{
4582		10	MatroskaDemuxContext *matroska = s->priv_data;
4583		10	AVStream *st = s->streams[0];
4584		10	FFStream *const sti = ffstream(st);
4585		10	double bandwidth = 0.0;
4586
4587	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int i = 0; i < sti->nb_index_entries; i++) {
4588		101	int64_t prebuffer_ns = 1000000000;
4589		101	int64_t time_ns = sti->index_entries[i].timestamp * matroska->time_scale;
4590		101	double nano_seconds_per_second = 1000000000.0;
4591			int64_t prebuffered_ns;
4592		101	double prebuffer_bytes = 0.0;
4593		101	int64_t temp_prebuffer_ns = prebuffer_ns;
4594			int64_t pre_bytes, pre_ns;
4595			double pre_sec, prebuffer, bits_per_second;
4596		101	CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4597			// Start with the first Cue.
4598		101	CueDesc desc_end = desc_beg;
4599
4600	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 101 times.	101	if (time_ns > INT64_MAX - prebuffer_ns)
4601		✗	return -1;
4602		101	prebuffered_ns = time_ns + prebuffer_ns;
4603
4604			// Figure out how much data we have downloaded for the prebuffer. This will
4605			// be used later to adjust the bits per sample to try.
4606	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) {
4607			// Prebuffered the entire Cue.
4608		21	prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4609		21	temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4610		21	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4611			}
4612	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 100 times.	101	if (desc_end.start_time_ns == -1) {
4613			// The prebuffer is larger than the duration.
4614	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4615		✗	return -1;
4616		1	bits_per_second = 0.0;
4617			} else {
4618			// The prebuffer ends in the last Cue. Estimate how much data was
4619			// prebuffered.
4620		100	pre_bytes = desc_end.end_offset - desc_end.start_offset;
4621		100	pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4622	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 100 times.	100	if (pre_ns <= 0)
4623		✗	return -1;
4624		100	pre_sec = pre_ns / nano_seconds_per_second;
4625		100	prebuffer_bytes +=
4626		100	pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4627
4628		100	prebuffer = prebuffer_ns / nano_seconds_per_second;
4629
4630			// Set this to 0.0 in case our prebuffer buffers the entire video.
4631		100	bits_per_second = 0.0;
4632			do {
4633		560	int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4634		560	int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4635			double desc_sec, calc_bits_per_second, percent, mod_bits_per_second;
4636	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)
4637		✗	return -1;
4638
4639		560	desc_sec = desc_ns / nano_seconds_per_second;
4640		560	calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4641
4642			// Drop the bps by the percentage of bytes buffered.
4643		560	percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4644		560	mod_bits_per_second = calc_bits_per_second * percent;
4645
4646	2/2 ✓ Branch 0 taken 555 times. ✓ Branch 1 taken 5 times.	560	if (prebuffer < desc_sec) {
4647		555	double search_sec =
4648		555	(double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4649
4650			// Add 1 so the bits per second should be a little bit greater than file
4651			// datarate.
4652		555	int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4653		555	const double min_buffer = 0.0;
4654		555	double buffer = prebuffer;
4655		555	double sec_to_download = 0.0;
4656
4657		555	int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4658			min_buffer, &buffer, &sec_to_download,
4659			s, cues_start);
4660	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (rv < 0) {
4661		✗	return -1;
4662	2/2 ✓ Branch 0 taken 100 times. ✓ Branch 1 taken 455 times.	555	} else if (rv == 0) {
4663		100	bits_per_second = (double)(bps);
4664		100	break;
4665			}
4666			}
4667
4668		460	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4669	1/2 ✓ Branch 0 taken 460 times. ✗ Branch 1 not taken.	460	} while (desc_end.start_time_ns != -1);
4670			}
4671	2/2 ✓ Branch 0 taken 38 times. ✓ Branch 1 taken 63 times.	101	if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4672			}
4673		10	return (int64_t)bandwidth;
4674			}
4675
4676		10	static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4677			{
4678		10	MatroskaDemuxContext *matroska = s->priv_data;
4679		10	EbmlList *seekhead_list = &matroska->seekhead;
4680		10	MatroskaSeekhead *seekhead = seekhead_list->elem;
4681		10	AVStream *const st = s->streams[0];
4682		10	FFStream *const sti = ffstream(st);
4683			AVBPrint bprint;
4684			char *buf;
4685		10	int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4686			int i;
4687			int ret;
4688
4689			// determine cues start and end positions
4690	1/2 ✓ Branch 0 taken 34 times. ✗ Branch 1 not taken.	34	for (i = 0; i < seekhead_list->nb_elem; i++)
4691	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 24 times.	34	if (seekhead[i].id == MATROSKA_ID_CUES)
4692		10	break;
4693
4694	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (i >= seekhead_list->nb_elem) return -1;
4695
4696		10	before_pos = avio_tell(matroska->ctx->pb);
4697		10	cues_start = seekhead[i].pos + matroska->segment_start;
4698	1/2 ✓ Branch 1 taken 10 times. ✗ Branch 2 not taken.	10	if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4699			// cues_end is computed as cues_start + cues_length + length of the
4700			// Cues element ID (i.e. 4) + EBML length of the Cues element.
4701			// cues_end is inclusive and the above sum is reduced by 1.
4702			uint64_t cues_length, cues_id;
4703			int bytes_read;
4704		10	bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4705	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))
4706		✗	return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4707		10	bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4708	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (bytes_read < 0)
4709		✗	return bytes_read;
4710		10	cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4711			}
4712		10	avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4713	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;
4714
4715			// parse the cues
4716		10	matroska_parse_cues(matroska);
4717
4718	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (!sti->nb_index_entries)
4719		✗	return AVERROR_INVALIDDATA;
4720
4721			// cues start
4722		10	av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4723
4724			// cues end
4725		10	av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4726
4727			// if the file has cues at the start, fix up the init range so that
4728			// it does not include it
4729	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (cues_start <= init_range)
4730		✗	av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4731
4732			// bandwidth
4733		10	bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4734	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (bandwidth < 0) return -1;
4735		10	av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4736
4737			// check if all clusters start with key frames
4738		10	av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
4739
4740			// Store cue point timestamps as a comma separated list
4741			// for checking subsegment alignment in the muxer.
4742		10	av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
4743	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int i = 0; i < sti->nb_index_entries; i++)
4744		101	av_bprintf(&bprint, "%" PRId64",", sti->index_entries[i].timestamp);
4745	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 10 times.	10	if (!av_bprint_is_complete(&bprint)) {
4746		✗	av_bprint_finalize(&bprint, NULL);
4747		✗	return AVERROR(ENOMEM);
4748			}
4749			// Remove the trailing ','
4750		10	bprint.str[--bprint.len] = '\0';
4751	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 10 times.	10	if ((ret = av_bprint_finalize(&bprint, &buf)) < 0)
4752		✗	return ret;
4753		10	av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS,
4754			buf, AV_DICT_DONT_STRDUP_VAL);
4755
4756		10	return 0;
4757			}
4758
4759		14	static int webm_dash_manifest_read_header(AVFormatContext *s)
4760			{
4761			char *buf;
4762		14	int ret = matroska_read_header(s);
4763			int64_t init_range;
4764			MatroskaTrack *tracks;
4765		14	MatroskaDemuxContext *matroska = s->priv_data;
4766	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (ret) {
4767		✗	av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4768		✗	return -1;
4769			}
4770	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) {
4771		✗	av_log(s, AV_LOG_ERROR, "No track found\n");
4772		✗	return AVERROR_INVALIDDATA;
4773			}
4774
4775	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 4 times.	14	if (!matroska->is_live) {
4776		10	buf = av_asprintf("%g", matroska->duration);
4777	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (!buf)
4778		✗	return AVERROR(ENOMEM);
4779		10	av_dict_set(&s->streams[0]->metadata, DURATION,
4780			buf, AV_DICT_DONT_STRDUP_VAL);
4781
4782			// initialization range
4783			// 5 is the offset of Cluster ID.
4784		10	init_range = avio_tell(s->pb) - 5;
4785		10	av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4786			}
4787
4788			// basename of the file
4789		14	buf = strrchr(s->url, '/');
4790	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);
4791
4792			// track number
4793		14	tracks = matroska->tracks.elem;
4794		14	av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4795
4796			// parse the cues and populate Cue related fields
4797	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 4 times.	14	if (!matroska->is_live) {
4798		10	ret = webm_dash_manifest_cues(s, init_range);
4799	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (ret < 0) {
4800		✗	av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4801		✗	return ret;
4802			}
4803			}
4804
4805			// use the bandwidth from the command line if it was provided
4806	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 12 times.	14	if (matroska->bandwidth > 0) {
4807		2	av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4808		2	matroska->bandwidth, 0);
4809			}
4810		14	return 0;
4811			}
4812
4813		28	static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4814			{
4815		28	return AVERROR_EOF;
4816			}
4817
4818			#define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4819			static const AVOption options[] = {
4820			{ "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 },
4821			{ "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 },
4822			{ NULL },
4823			};
4824
4825			static const AVClass webm_dash_class = {
4826			.class_name = "WebM DASH Manifest demuxer",
4827			.item_name = av_default_item_name,
4828			.option = options,
4829			.version = LIBAVUTIL_VERSION_INT,
4830			};
4831
4832			const FFInputFormat ff_webm_dash_manifest_demuxer = {
4833			.p.name = "webm_dash_manifest",
4834			.p.long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4835			.p.priv_class = &webm_dash_class,
4836			.priv_data_size = sizeof(MatroskaDemuxContext),
4837			.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
4838			.read_header = webm_dash_manifest_read_header,
4839			.read_packet = webm_dash_manifest_read_packet,
4840			.read_close = matroska_read_close,
4841			};
4842			#endif
4843
4844			const FFInputFormat ff_matroska_demuxer = {
4845			.p.name = "matroska,webm",
4846			.p.long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4847			.p.extensions = "mkv,mk3d,mka,mks,webm",
4848			.p.mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska",
4849			.priv_data_size = sizeof(MatroskaDemuxContext),
4850			.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
4851			.read_probe = matroska_probe,
4852			.read_header = matroska_read_header,
4853			.read_packet = matroska_read_packet,
4854			.read_close = matroska_read_close,
4855			.read_seek = matroska_read_seek,
4856			};
4857