FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Matroska file demuxer
3			* Copyright (c) 2003-2008 The FFmpeg Project
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* Matroska file demuxer
25			* @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26			* @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27			* @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28			* @see specs available on the Matroska project page: http://www.matroska.org/
29			*/
30
31			#include "config.h"
32			#include "config_components.h"
33
34			#include <inttypes.h>
35			#include <stdio.h>
36
37			#include "libavutil/avstring.h"
38			#include "libavutil/base64.h"
39			#include "libavutil/bprint.h"
40			#include "libavutil/dict.h"
41			#include "libavutil/display.h"
42			#include "libavutil/hdr_dynamic_metadata.h"
43			#include "libavutil/intfloat.h"
44			#include "libavutil/intreadwrite.h"
45			#include "libavutil/lzo.h"
46			#include "libavutil/mastering_display_metadata.h"
47			#include "libavutil/mathematics.h"
48			#include "libavutil/mem.h"
49			#include "libavutil/opt.h"
50			#include "libavutil/pixdesc.h"
51			#include "libavutil/time_internal.h"
52			#include "libavutil/spherical.h"
53
54			#include "libavcodec/bytestream.h"
55			#include "libavcodec/defs.h"
56			#include "libavcodec/flac.h"
57			#include "libavcodec/itut35.h"
58			#include "libavcodec/mpeg4audio.h"
59			#include "libavcodec/packet_internal.h"
60
61			#include "avformat.h"
62			#include "avio_internal.h"
63			#include "demux.h"
64			#include "dovi_isom.h"
65			#include "internal.h"
66			#include "isom.h"
67			#include "matroska.h"
68			#include "oggdec.h"
69			/* For ff_codec_get_id(). */
70			#include "riff.h"
71			#include "rmsipr.h"
72
73			#if CONFIG_BZLIB
74			#include <bzlib.h>
75			#endif
76			#if CONFIG_ZLIB
77			#include <zlib.h>
78			#endif
79
80			#include "qtpalette.h"
81
82			#define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
83			#define NEEDS_CHECKING 2 /* Indicates that some error checks
84			* still need to be performed */
85			#define LEVEL_ENDED 3 /* return value of ebml_parse when the
86			* syntax level used for parsing ended. */
87			#define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
88			* of unkown, potentially damaged data is encountered,
89			* it is considered an error. */
90			#define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
91			* to this many bytes of unknown data for the
92			* SKIP_THRESHOLD check. */
93
94			typedef enum {
95			EBML_NONE,
96			EBML_UINT,
97			EBML_SINT,
98			EBML_FLOAT,
99			EBML_STR,
100			EBML_UTF8,
101			EBML_BIN,
102			EBML_NEST,
103			EBML_LEVEL1,
104			EBML_STOP,
105			EBML_TYPE_COUNT
106			} EbmlType;
107
108			typedef struct CountedElement {
109			union {
110			uint64_t u;
111			int64_t i;
112			double f;
113			char *s;
114			} el;
115			unsigned count;
116			} CountedElement;
117
118			typedef const struct EbmlSyntax {
119			uint32_t id;
120			uint8_t type;
121			uint8_t is_counted;
122			size_t list_elem_size;
123			size_t data_offset;
124			union {
125			int64_t i;
126			uint64_t u;
127			double f;
128			const char *s;
129			const struct EbmlSyntax *n;
130			} def;
131			} EbmlSyntax;
132
133			typedef struct EbmlList {
134			int nb_elem;
135			unsigned int alloc_elem_size;
136			void *elem;
137			} EbmlList;
138
139			typedef struct EbmlBin {
140			int size;
141			AVBufferRef *buf;
142			uint8_t *data;
143			int64_t pos;
144			} EbmlBin;
145
146			typedef struct Ebml {
147			uint64_t version;
148			uint64_t max_size;
149			uint64_t id_length;
150			char *doctype;
151			uint64_t doctype_version;
152			} Ebml;
153
154			typedef struct MatroskaTrackCompression {
155			uint64_t algo;
156			EbmlBin settings;
157			} MatroskaTrackCompression;
158
159			typedef struct MatroskaTrackEncryption {
160			uint64_t algo;
161			EbmlBin key_id;
162			} MatroskaTrackEncryption;
163
164			typedef struct MatroskaTrackEncoding {
165			uint64_t scope;
166			uint64_t type;
167			MatroskaTrackCompression compression;
168			MatroskaTrackEncryption encryption;
169			} MatroskaTrackEncoding;
170
171			typedef struct MatroskaMasteringMeta {
172			double r_x;
173			double r_y;
174			double g_x;
175			double g_y;
176			double b_x;
177			double b_y;
178			double white_x;
179			double white_y;
180			double max_luminance;
181			CountedElement min_luminance;
182			} MatroskaMasteringMeta;
183
184			typedef struct MatroskaTrackVideoColor {
185			uint64_t matrix_coefficients;
186			uint64_t bits_per_channel;
187			uint64_t chroma_sub_horz;
188			uint64_t chroma_sub_vert;
189			uint64_t cb_sub_horz;
190			uint64_t cb_sub_vert;
191			uint64_t chroma_siting_horz;
192			uint64_t chroma_siting_vert;
193			uint64_t range;
194			uint64_t transfer_characteristics;
195			uint64_t primaries;
196			uint64_t max_cll;
197			uint64_t max_fall;
198			MatroskaMasteringMeta mastering_meta;
199			} MatroskaTrackVideoColor;
200
201			typedef struct MatroskaTrackVideoProjection {
202			uint64_t type;
203			EbmlBin private;
204			double yaw;
205			double pitch;
206			double roll;
207			} MatroskaTrackVideoProjection;
208
209			typedef struct MatroskaTrackVideo {
210			double frame_rate;
211			uint64_t display_width;
212			uint64_t display_height;
213			uint64_t pixel_width;
214			uint64_t pixel_height;
215			uint64_t cropped_width;
216			uint64_t cropped_height;
217			EbmlBin color_space;
218			uint64_t pixel_cropt;
219			uint64_t pixel_cropl;
220			uint64_t pixel_cropb;
221			uint64_t pixel_cropr;
222			uint64_t display_unit;
223			uint64_t interlaced;
224			uint64_t field_order;
225			uint64_t stereo_mode;
226			uint64_t alpha_mode;
227			EbmlList color;
228			MatroskaTrackVideoProjection projection;
229			} MatroskaTrackVideo;
230
231			typedef struct MatroskaTrackAudio {
232			double samplerate;
233			double out_samplerate;
234			uint64_t bitdepth;
235			uint64_t channels;
236
237			/* real audio header (extracted from extradata) */
238			int coded_framesize;
239			int sub_packet_h;
240			int frame_size;
241			int sub_packet_size;
242			int sub_packet_cnt;
243			int pkt_cnt;
244			uint64_t buf_timecode;
245			uint8_t *buf;
246			} MatroskaTrackAudio;
247
248			typedef struct MatroskaTrackPlane {
249			uint64_t uid;
250			uint64_t type;
251			} MatroskaTrackPlane;
252
253			typedef struct MatroskaTrackOperation {
254			EbmlList combine_planes;
255			} MatroskaTrackOperation;
256
257			typedef struct MatroskaBlockAdditionMapping {
258			uint64_t value;
259			char *name;
260			uint64_t type;
261			EbmlBin extradata;
262			} MatroskaBlockAdditionMapping;
263
264			typedef struct MatroskaTrack {
265			uint64_t num;
266			uint64_t uid;
267			uint64_t type;
268			char *name;
269			char *codec_id;
270			EbmlBin codec_priv;
271			char *language;
272			double time_scale;
273			uint64_t default_duration;
274			uint64_t flag_default;
275			uint64_t flag_forced;
276			uint64_t flag_comment;
277			uint64_t flag_hearingimpaired;
278			uint64_t flag_visualimpaired;
279			uint64_t flag_textdescriptions;
280			CountedElement flag_original;
281			uint64_t seek_preroll;
282			MatroskaTrackVideo video;
283			MatroskaTrackAudio audio;
284			MatroskaTrackOperation operation;
285			EbmlList encodings;
286			uint64_t codec_delay;
287			uint64_t codec_delay_in_track_tb;
288
289			AVStream *stream;
290			int64_t end_timecode;
291			int ms_compat;
292			int needs_decoding;
293			uint64_t max_block_additional_id;
294			EbmlList block_addition_mappings;
295
296			uint32_t palette[AVPALETTE_COUNT];
297			int has_palette;
298			} MatroskaTrack;
299
300			typedef struct MatroskaAttachment {
301			uint64_t uid;
302			char *filename;
303			char *description;
304			char *mime;
305			EbmlBin bin;
306
307			AVStream *stream;
308			} MatroskaAttachment;
309
310			typedef struct MatroskaChapter {
311			uint64_t start;
312			uint64_t end;
313			uint64_t uid;
314			char *title;
315
316			AVChapter *chapter;
317			} MatroskaChapter;
318
319			typedef struct MatroskaIndexPos {
320			uint64_t track;
321			uint64_t pos;
322			} MatroskaIndexPos;
323
324			typedef struct MatroskaIndex {
325			uint64_t time;
326			EbmlList pos;
327			} MatroskaIndex;
328
329			typedef struct MatroskaTag {
330			char *name;
331			char *string;
332			char *lang;
333			uint64_t def;
334			EbmlList sub;
335			} MatroskaTag;
336
337			typedef struct MatroskaTagTarget {
338			char *type;
339			uint64_t typevalue;
340			uint64_t trackuid;
341			uint64_t chapteruid;
342			uint64_t attachuid;
343			} MatroskaTagTarget;
344
345			typedef struct MatroskaTags {
346			MatroskaTagTarget target;
347			EbmlList tag;
348			} MatroskaTags;
349
350			typedef struct MatroskaSeekhead {
351			uint64_t id;
352			uint64_t pos;
353			} MatroskaSeekhead;
354
355			typedef struct MatroskaLevel {
356			uint64_t start;
357			uint64_t length;
358			} MatroskaLevel;
359
360			typedef struct MatroskaBlockMore {
361			uint64_t additional_id;
362			EbmlBin additional;
363			} MatroskaBlockMore;
364
365			typedef struct MatroskaBlock {
366			uint64_t duration;
367			CountedElement reference;
368			uint64_t non_simple;
369			EbmlBin bin;
370			EbmlList blockmore;
371			int64_t discard_padding;
372			} MatroskaBlock;
373
374			typedef struct MatroskaCluster {
375			MatroskaBlock block;
376			uint64_t timecode;
377			int64_t pos;
378			} MatroskaCluster;
379
380			typedef struct MatroskaLevel1Element {
381			int64_t pos;
382			uint32_t id;
383			int parsed;
384			} MatroskaLevel1Element;
385
386			typedef struct MatroskaDemuxContext {
387			const AVClass *class;
388			AVFormatContext *ctx;
389
390			/* EBML stuff */
391			MatroskaLevel levels[EBML_MAX_DEPTH];
392			int num_levels;
393			uint32_t current_id;
394			int64_t resync_pos;
395			int unknown_count;
396
397			uint64_t time_scale;
398			double duration;
399			char *title;
400			char *muxingapp;
401			EbmlBin date_utc;
402			EbmlList tracks;
403			EbmlList attachments;
404			EbmlList chapters;
405			EbmlList index;
406			EbmlList tags;
407			EbmlList seekhead;
408
409			/* byte position of the segment inside the stream */
410			int64_t segment_start;
411
412			/* This packet coincides with FFFormatContext.parse_pkt
413			* and is not owned by us. */
414			AVPacket *pkt;
415
416			/* the packet queue */
417			PacketList queue;
418
419			int done;
420
421			/* What to skip before effectively reading a packet. */
422			int skip_to_keyframe;
423			uint64_t skip_to_timecode;
424
425			/* File has a CUES element, but we defer parsing until it is needed. */
426			int cues_parsing_deferred;
427
428			/* Level1 elements and whether they were read yet */
429			MatroskaLevel1Element level1_elems[64];
430			int num_level1_elems;
431
432			MatroskaCluster current_cluster;
433
434			int is_webm;
435
436			/* WebM DASH Manifest live flag */
437			int is_live;
438
439			/* Bandwidth value for WebM DASH Manifest */
440			int bandwidth;
441			} MatroskaDemuxContext;
442
443			#define CHILD_OF(parent) { .def = { .n = parent } }
444
445			// The following forward declarations need their size because
446			// a tentative definition with internal linkage must not be an
447			// incomplete type (6.7.2 in C90, 6.9.2 in C99).
448			// Removing the sizes breaks MSVC.
449			static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
450			matroska_track[33], matroska_track_encoding[6], matroska_track_encodings[2],
451			matroska_track_combine_planes[2], matroska_track_operation[2], matroska_block_addition_mapping[5], matroska_tracks[2],
452			matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
453			matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
454			matroska_blockadditions[2], matroska_blockgroup[8], matroska_cluster_parsing[8];
455
456			static EbmlSyntax ebml_header[] = {
457			{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
458			{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, 0, offsetof(Ebml, max_size), { .u = 8 } },
459			{ EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, 0, offsetof(Ebml, id_length), { .u = 4 } },
460			{ EBML_ID_DOCTYPE, EBML_STR, 0, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
461			{ EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
462			{ EBML_ID_EBMLVERSION, EBML_NONE },
463			{ EBML_ID_DOCTYPEVERSION, EBML_NONE },
464			CHILD_OF(ebml_syntax)
465			};
466
467			static EbmlSyntax ebml_syntax[] = {
468			{ EBML_ID_HEADER, EBML_NEST, 0, 0, 0, { .n = ebml_header } },
469			{ MATROSKA_ID_SEGMENT, EBML_STOP },
470			{ 0 }
471			};
472
473			static EbmlSyntax matroska_info[] = {
474			{ MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
475			{ MATROSKA_ID_DURATION, EBML_FLOAT, 0, 0, offsetof(MatroskaDemuxContext, duration) },
476			{ MATROSKA_ID_TITLE, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, title) },
477			{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
478			{ MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, muxingapp) },
479			{ MATROSKA_ID_DATEUTC, EBML_BIN, 0, 0, offsetof(MatroskaDemuxContext, date_utc) },
480			{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
481			CHILD_OF(matroska_segment)
482			};
483
484			static EbmlSyntax matroska_mastering_meta[] = {
485			{ MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_x) },
486			{ MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_y) },
487			{ MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_x) },
488			{ MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_y) },
489			{ MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_x) },
490			{ MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_y) },
491			{ MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_x) },
492			{ MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_y) },
493			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 1, 0, offsetof(MatroskaMasteringMeta, min_luminance) },
494			{ MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, max_luminance) },
495			CHILD_OF(matroska_track_video_color)
496			};
497
498			static EbmlSyntax matroska_track_video_color[] = {
499			{ MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
500			{ MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u = 0 } },
501			{ MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz) },
502			{ MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert) },
503			{ MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz) },
504			{ MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert) },
505			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
506			{ MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
507			{ MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
508			{ MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
509			{ MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
510			{ MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_cll) },
511			{ MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_fall) },
512			{ MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
513			CHILD_OF(matroska_track_video)
514			};
515
516			static EbmlSyntax matroska_track_video_projection[] = {
517			{ MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
518			{ MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideoProjection, private) },
519			{ MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f = 0.0 } },
520			{ MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f = 0.0 } },
521			{ MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f = 0.0 } },
522			CHILD_OF(matroska_track_video)
523			};
524
525			static EbmlSyntax matroska_track_video[] = {
526			{ MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideo, frame_rate) },
527			{ MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
528			{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
529			{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_width) },
530			{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_height) },
531			{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideo, color_space) },
532			{ MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, alpha_mode), { .u = 0 } },
533			{ MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
534			{ MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
535			{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropb), {.u = 0 } },
536			{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropt), {.u = 0 } },
537			{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropl), {.u = 0 } },
538			{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_cropr), {.u = 0 } },
539			{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
540			{ MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
541			{ MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
542			{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
543			{ MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
544			CHILD_OF(matroska_track)
545			};
546
547			static EbmlSyntax matroska_track_audio[] = {
548			{ MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
549			{ MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
550			{ MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, bitdepth) },
551			{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
552			CHILD_OF(matroska_track)
553			};
554
555			static EbmlSyntax matroska_track_encoding_compression[] = {
556			{ MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackCompression, algo), { .u = MATROSKA_TRACK_ENCODING_COMP_ZLIB } },
557			{ MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, 0, offsetof(MatroskaTrackCompression, settings) },
558			CHILD_OF(matroska_track_encoding)
559			};
560
561			static EbmlSyntax matroska_track_encoding_encryption[] = {
562			{ MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
563			{ MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, 0, offsetof(MatroskaTrackEncryption,key_id) },
564			{ MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
565			{ MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
566			{ MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
567			{ MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
568			{ MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
569			CHILD_OF(matroska_track_encoding)
570			};
571			static EbmlSyntax matroska_track_encoding[] = {
572			{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
573			{ MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
574			{ MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
575			{ MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
576			{ MATROSKA_ID_ENCODINGORDER, EBML_NONE },
577			CHILD_OF(matroska_track_encodings)
578			};
579
580			static EbmlSyntax matroska_track_encodings[] = {
581			{ MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, 0, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
582			CHILD_OF(matroska_track)
583			};
584
585			static EbmlSyntax matroska_track_plane[] = {
586			{ MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,uid) },
587			{ MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,type) },
588			CHILD_OF(matroska_track_combine_planes)
589			};
590
591			static EbmlSyntax matroska_track_combine_planes[] = {
592			{ MATROSKA_ID_TRACKPLANE, EBML_NEST, 0, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
593			CHILD_OF(matroska_track_operation)
594			};
595
596			static EbmlSyntax matroska_track_operation[] = {
597			{ MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, 0, {.n = matroska_track_combine_planes} },
598			CHILD_OF(matroska_track)
599			};
600
601			static EbmlSyntax matroska_block_addition_mapping[] = {
602			{ MATROSKA_ID_BLKADDIDVALUE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, value) },
603			{ MATROSKA_ID_BLKADDIDNAME, EBML_STR, 0, 0, offsetof(MatroskaBlockAdditionMapping, name) },
604			{ MATROSKA_ID_BLKADDIDTYPE, EBML_UINT, 0, 0, offsetof(MatroskaBlockAdditionMapping, type), { .u = MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT } },
605			{ MATROSKA_ID_BLKADDIDEXTRADATA, EBML_BIN, 0, 0, offsetof(MatroskaBlockAdditionMapping, extradata) },
606			CHILD_OF(matroska_track)
607			};
608
609			static EbmlSyntax matroska_track[] = {
610			{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, 0, offsetof(MatroskaTrack, num) },
611			{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTrack, name) },
612			{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, uid) },
613			{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrack, type) },
614			{ MATROSKA_ID_CODECID, EBML_STR, 0, 0, offsetof(MatroskaTrack, codec_id) },
615			{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrack, codec_priv) },
616			{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, codec_delay), { .u = 0 } },
617			{ MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
618			{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
619			{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
620			{ MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
621			{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
622			{ MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
623			{ MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_hearingimpaired), { .u = 0 } },
624			{ MATROSKA_ID_TRACKFLAGVISUALIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_visualimpaired), { .u = 0 } },
625			{ MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_textdescriptions), { .u = 0 } },
626			{ MATROSKA_ID_TRACKFLAGORIGINAL, EBML_UINT, 1, 0, offsetof(MatroskaTrack, flag_original), {.u = 0 } },
627			{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
628			{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
629			{ MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
630			{ MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, 0, { .n = matroska_track_encodings } },
631			{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, max_block_additional_id), { .u = 0 } },
632			{ MATROSKA_ID_TRACKBLKADDMAPPING, EBML_NEST, 0, sizeof(MatroskaBlockAdditionMapping), offsetof(MatroskaTrack, block_addition_mappings), { .n = matroska_block_addition_mapping } },
633			{ MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, 0, offsetof(MatroskaTrack, seek_preroll), { .u = 0 } },
634			{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
635			{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
636			{ MATROSKA_ID_CODECNAME, EBML_NONE },
637			{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
638			{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
639			{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
640			{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
641			{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
642			CHILD_OF(matroska_tracks)
643			};
644
645			static EbmlSyntax matroska_tracks[] = {
646			{ MATROSKA_ID_TRACKENTRY, EBML_NEST, 0, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
647			CHILD_OF(matroska_segment)
648			};
649
650			static EbmlSyntax matroska_attachment[] = {
651			{ MATROSKA_ID_FILEUID, EBML_UINT, 0, 0, offsetof(MatroskaAttachment, uid) },
652			{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, filename) },
653			{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, 0, offsetof(MatroskaAttachment, mime) },
654			{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, 0, offsetof(MatroskaAttachment, bin) },
655			{ MATROSKA_ID_FILEDESC, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, description) },
656			CHILD_OF(matroska_attachments)
657			};
658
659			static EbmlSyntax matroska_attachments[] = {
660			{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, 0, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
661			CHILD_OF(matroska_segment)
662			};
663
664			static EbmlSyntax matroska_chapter_display[] = {
665			{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaChapter, title) },
666			{ MATROSKA_ID_CHAPLANG, EBML_NONE },
667			{ MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
668			CHILD_OF(matroska_chapter_entry)
669			};
670
671			static EbmlSyntax matroska_chapter_entry[] = {
672			{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
673			{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
674			{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaChapter, uid) },
675			{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter_display } },
676			{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
677			{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
678			{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
679			{ MATROSKA_ID_CHAPTERATOM, EBML_NONE },
680			CHILD_OF(matroska_chapter)
681			};
682
683			static EbmlSyntax matroska_chapter[] = {
684			{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, 0, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
685			{ MATROSKA_ID_EDITIONUID, EBML_NONE },
686			{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
687			{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
688			{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
689			CHILD_OF(matroska_chapters)
690			};
691
692			static EbmlSyntax matroska_chapters[] = {
693			{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter } },
694			CHILD_OF(matroska_segment)
695			};
696
697			static EbmlSyntax matroska_index_pos[] = {
698			{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, track) },
699			{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, pos) },
700			{ MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
701			{ MATROSKA_ID_CUEDURATION, EBML_NONE },
702			{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
703			CHILD_OF(matroska_index_entry)
704			};
705
706			static EbmlSyntax matroska_index_entry[] = {
707			{ MATROSKA_ID_CUETIME, EBML_UINT, 0, 0, offsetof(MatroskaIndex, time) },
708			{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, 0, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
709			CHILD_OF(matroska_index)
710			};
711
712			static EbmlSyntax matroska_index[] = {
713			{ MATROSKA_ID_POINTENTRY, EBML_NEST, 0, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
714			CHILD_OF(matroska_segment)
715			};
716
717			static EbmlSyntax matroska_simpletag[] = {
718			{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTag, name) },
719			{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaTag, string) },
720			{ MATROSKA_ID_TAGLANG, EBML_STR, 0, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
721			{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
722			{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
723			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
724			CHILD_OF(matroska_tag)
725			};
726
727			static EbmlSyntax matroska_tagtargets[] = {
728			{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, 0, offsetof(MatroskaTagTarget, type) },
729			{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
730			{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, trackuid), { .u = 0 } },
731			{ MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, chapteruid), { .u = 0 } },
732			{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, attachuid), { .u = 0 } },
733			CHILD_OF(matroska_tag)
734			};
735
736			static EbmlSyntax matroska_tag[] = {
737			{ MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
738			{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
739			CHILD_OF(matroska_tags)
740			};
741
742			static EbmlSyntax matroska_tags[] = {
743			{ MATROSKA_ID_TAG, EBML_NEST, 0, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
744			CHILD_OF(matroska_segment)
745			};
746
747			static EbmlSyntax matroska_seekhead_entry[] = {
748			{ MATROSKA_ID_SEEKID, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, id) },
749			{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
750			CHILD_OF(matroska_seekhead)
751			};
752
753			static EbmlSyntax matroska_seekhead[] = {
754			{ MATROSKA_ID_SEEKENTRY, EBML_NEST, 0, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
755			CHILD_OF(matroska_segment)
756			};
757
758			static EbmlSyntax matroska_segment[] = {
759			{ MATROSKA_ID_CLUSTER, EBML_STOP },
760			{ MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, 0, { .n = matroska_info } },
761			{ MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tracks } },
762			{ MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_attachments } },
763			{ MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_chapters } },
764			{ MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, 0, { .n = matroska_index } },
765			{ MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tags } },
766			{ MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, 0, { .n = matroska_seekhead } },
767			{ 0 } /* We don't want to go back to level 0, so don't add the parent. */
768			};
769
770			static EbmlSyntax matroska_segments[] = {
771			{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, 0, { .n = matroska_segment } },
772			{ 0 }
773			};
774
775			static EbmlSyntax matroska_blockmore[] = {
776			{ MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, 0, offsetof(MatroskaBlockMore,additional_id), { .u = MATROSKA_BLOCK_ADD_ID_OPAQUE } },
777			{ MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, 0, offsetof(MatroskaBlockMore,additional) },
778			CHILD_OF(matroska_blockadditions)
779			};
780
781			static EbmlSyntax matroska_blockadditions[] = {
782			{ MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, sizeof(MatroskaBlockMore), offsetof(MatroskaBlock, blockmore), { .n = matroska_blockmore } },
783			CHILD_OF(matroska_blockgroup)
784			};
785
786			static EbmlSyntax matroska_blockgroup[] = {
787			{ MATROSKA_ID_BLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
788			{ MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, 0, { .n = matroska_blockadditions} },
789			{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, 0, offsetof(MatroskaBlock, duration) },
790			{ MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, 0, offsetof(MatroskaBlock, discard_padding) },
791			{ MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 1, 0, offsetof(MatroskaBlock, reference) },
792			{ MATROSKA_ID_CODECSTATE, EBML_NONE },
793			{ 1, EBML_UINT, 0, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
794			CHILD_OF(matroska_cluster_parsing)
795			};
796
797			// The following array contains SimpleBlock and BlockGroup twice
798			// in order to reuse the other values for matroska_cluster_enter.
799			static EbmlSyntax matroska_cluster_parsing[] = {
800			{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
801			{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, 0, { .n = matroska_blockgroup } },
802			{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, 0, offsetof(MatroskaCluster, timecode) },
803			{ MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
804			{ MATROSKA_ID_BLOCKGROUP, EBML_STOP },
805			{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
806			{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
807			CHILD_OF(matroska_segment)
808			};
809
810			static EbmlSyntax matroska_cluster_enter[] = {
811			{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, 0, { .n = &matroska_cluster_parsing[2] } },
812			{ 0 }
813			};
814			#undef CHILD_OF
815
816			static const CodecMime mkv_image_mime_tags[] = {
817			{"image/gif" , AV_CODEC_ID_GIF},
818			{"image/jpeg" , AV_CODEC_ID_MJPEG},
819			{"image/png" , AV_CODEC_ID_PNG},
820			{"image/tiff" , AV_CODEC_ID_TIFF},
821
822			{"" , AV_CODEC_ID_NONE}
823			};
824
825			static const CodecMime mkv_mime_tags[] = {
826			{"application/x-truetype-font", AV_CODEC_ID_TTF},
827			{"application/x-font" , AV_CODEC_ID_TTF},
828			{"application/vnd.ms-opentype", AV_CODEC_ID_OTF},
829			{"binary" , AV_CODEC_ID_BIN_DATA},
830
831			{"" , AV_CODEC_ID_NONE}
832			};
833
834			static const char * const matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT] = {
835			"left",
836			"right",
837			"background",
838			};
839
840			static const char *const matroska_doctypes[] = { "matroska", "webm" };
841
842			/*
843			* This function prepares the status for parsing of level 1 elements.
844			*/
845		198	static int matroska_reset_status(MatroskaDemuxContext *matroska,
846			uint32_t id, int64_t position)
847			{
848		198	int64_t err = 0;
849	2/2 ✓ Branch 0 taken 185 times. ✓ Branch 1 taken 13 times.	198	if (position >= 0) {
850		185	err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
851	1/2 ✓ Branch 0 taken 185 times. ✗ Branch 1 not taken.	185	if (err > 0)
852		185	err = 0;
853			} else
854		13	position = avio_tell(matroska->ctx->pb);
855
856		198	matroska->current_id = id;
857		198	matroska->num_levels = 1;
858		198	matroska->unknown_count = 0;
859		198	matroska->resync_pos = position;
860	2/2 ✓ Branch 0 taken 35 times. ✓ Branch 1 taken 163 times.	198	if (id)
861		35	matroska->resync_pos -= (av_log2(id) + 7) / 8;
862
863		198	return err;
864			}
865
866		13	static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
867			{
868		13	AVIOContext *pb = matroska->ctx->pb;
869			uint32_t id;
870
871			/* Try to seek to the last position to resync from. If this doesn't work,
872			* we resync from the earliest position available: The start of the buffer. */
873	3/4 ✓ Branch 1 taken 13 times. ✗ Branch 2 not taken. ✓ Branch 4 taken 2 times. ✓ Branch 5 taken 11 times.	13	if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
874		2	av_log(matroska->ctx, AV_LOG_WARNING,
875			"Seek to desired resync point failed. Seeking to "
876			"earliest point available instead.\n");
877	1/2 ✓ Branch 1 taken 2 times. ✗ Branch 2 not taken.	2	avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
878			last_pos + 1), SEEK_SET);
879			}
880
881		13	id = avio_rb32(pb);
882
883			// try to find a toplevel element
884	2/2 ✓ Branch 1 taken 690589 times. ✓ Branch 2 taken 10 times.	690599	while (!avio_feof(pb)) {
885	3/6 ✓ Branch 0 taken 690589 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690589 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 690589 times. ✗ Branch 5 not taken.	690589	if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
886	3/4 ✓ Branch 0 taken 690589 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690587 times. ✓ Branch 3 taken 2 times.	690589	id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
887	3/4 ✓ Branch 0 taken 690587 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 690586 times. ✓ Branch 3 taken 1 times.	690587	id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
888	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 690586 times.	690586	id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
889			/* Prepare the context for parsing of a level 1 element. */
890		3	matroska_reset_status(matroska, id, -1);
891			/* Given that we are here means that an error has occurred,
892			* so treat the segment as unknown length in order not to
893			* discard valid data that happens to be beyond the designated
894			* end of the segment. */
895		3	matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
896		3	return 0;
897			}
898		690586	id = (id << 8) | avio_r8(pb);
899			}
900
901		10	matroska->done = 1;
902	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return pb->error ? pb->error : AVERROR_EOF;
903			}
904
905			/*
906			* Read: an "EBML number", which is defined as a variable-length
907			* array of bytes. The first byte indicates the length by giving a
908			* number of 0-bits followed by a one. The position of the first
909			* "one" bit inside the first byte indicates the length of this
910			* number.
911			* Returns: number of bytes read, < 0 on error
912			*/
913		142681	static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
914			int max_size, uint64_t *number, int eof_forbidden)
915			{
916		142681	int read, n = 1;
917			uint64_t total;
918			int64_t pos;
919
920			/* The first byte tells us the length in bytes - except when it is zero. */
921		142681	total = avio_r8(pb);
922	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 142667 times.	142681	if (pb->eof_reached)
923		14	goto err;
924
925			/* get the length of the EBML number */
926		142667	read = 8 - ff_log2_tab[total];
927
928	2/4 ✓ Branch 0 taken 142667 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 142667 times.	142667	if (!total || read > max_size) {
929		✗	pos = avio_tell(pb) - 1;
930		✗	if (!total) {
931		✗	av_log(matroska->ctx, AV_LOG_ERROR,
932			"0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
933			"of an EBML number\n", pos, pos);
934			} else {
935		✗	av_log(matroska->ctx, AV_LOG_ERROR,
936			"Length %d indicated by an EBML number's first byte 0x%02x "
937			"at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
938		✗	read, (uint8_t) total, pos, pos, max_size);
939			}
940		✗	return AVERROR_INVALIDDATA;
941			}
942
943			/* read out length */
944		142667	total ^= 1 << ff_log2_tab[total];
945	2/2 ✓ Branch 0 taken 71467 times. ✓ Branch 1 taken 142667 times.	214134	while (n++ < read)
946		71467	total = (total << 8) | avio_r8(pb);
947
948	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 142667 times.	142667	if (pb->eof_reached) {
949		✗	eof_forbidden = 1;
950		✗	goto err;
951			}
952
953		142667	*number = total;
954
955		142667	return read;
956
957		14	err:
958		14	pos = avio_tell(pb);
959	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (pb->error) {
960		✗	av_log(matroska->ctx, AV_LOG_ERROR,
961			"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
962			pos, pos);
963		✗	return pb->error;
964			}
965	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 14 times.	14	if (eof_forbidden) {
966		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
967			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
968		✗	return AVERROR(EIO);
969			}
970		14	return AVERROR_EOF;
971			}
972
973			/**
974			* Read a EBML length value.
975			* This needs special handling for the "unknown length" case which has multiple
976			* encodings.
977			*/
978		55823	static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
979			uint64_t *number)
980			{
981		55823	int res = ebml_read_num(matroska, pb, 8, number, 1);
982	3/4 ✓ Branch 0 taken 55823 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 17 times. ✓ Branch 3 taken 55806 times.	55823	if (res > 0 && *number + 1 == 1ULL << (7 * res))
983		17	*number = EBML_UNKNOWN_LENGTH;
984		55823	return res;
985			}
986
987			/*
988			* Read the next element as an unsigned int.
989			* Returns NEEDS_CHECKING unless size == 0.
990			*/
991		10649	static int ebml_read_uint(AVIOContext *pb, int size,
992			uint64_t default_value, uint64_t *num)
993			{
994		10649	int n = 0;
995
996	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10649 times.	10649	if (size == 0) {
997		✗	*num = default_value;
998		✗	return 0;
999			}
1000			/* big-endian ordering; build up number */
1001		10649	*num = 0;
1002	2/2 ✓ Branch 0 taken 26942 times. ✓ Branch 1 taken 10649 times.	37591	while (n++ < size)
1003		26942	*num = (*num << 8) | avio_r8(pb);
1004
1005		10649	return NEEDS_CHECKING;
1006			}
1007
1008			/*
1009			* Read the next element as a signed int.
1010			* Returns NEEDS_CHECKING unless size == 0.
1011			*/
1012		160	static int ebml_read_sint(AVIOContext *pb, int size,
1013			int64_t default_value, int64_t *num)
1014			{
1015		160	int n = 1;
1016
1017	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 160 times.	160	if (size == 0) {
1018		✗	*num = default_value;
1019		✗	return 0;
1020			} else {
1021		160	*num = sign_extend(avio_r8(pb), 8);
1022
1023			/* big-endian ordering; build up number */
1024	2/2 ✓ Branch 0 taken 95 times. ✓ Branch 1 taken 160 times.	255	while (n++ < size)
1025		95	*num = ((uint64_t)*num << 8) | avio_r8(pb);
1026			}
1027
1028		160	return NEEDS_CHECKING;
1029			}
1030
1031			/*
1032			* Read the next element as a float.
1033			* Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
1034			*/
1035		746	static int ebml_read_float(AVIOContext *pb, int size,
1036			double default_value, double *num)
1037			{
1038	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 746 times.	746	if (size == 0) {
1039		✗	*num = default_value;
1040		✗	return 0;
1041	2/2 ✓ Branch 0 taken 86 times. ✓ Branch 1 taken 660 times.	746	} else if (size == 4) {
1042		86	*num = av_int2float(avio_rb32(pb));
1043	1/2 ✓ Branch 0 taken 660 times. ✗ Branch 1 not taken.	660	} else if (size == 8) {
1044		660	*num = av_int2double(avio_rb64(pb));
1045			} else
1046		✗	return AVERROR_INVALIDDATA;
1047
1048		746	return NEEDS_CHECKING;
1049			}
1050
1051			/*
1052			* Read the next element as an ASCII string.
1053			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1054			*/
1055		2332	static int ebml_read_ascii(AVIOContext *pb, int size,
1056			const char *default_value, char **str)
1057			{
1058			char *res;
1059			int ret;
1060
1061	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2332 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	2332	if (size == 0 && default_value) {
1062		✗	res = av_strdup(default_value);
1063		✗	if (!res)
1064		✗	return AVERROR(ENOMEM);
1065			} else {
1066			/* EBML strings are usually not 0-terminated, so we allocate one
1067			* byte more, read the string and NUL-terminate it ourselves. */
1068	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2332 times.	2332	if (!(res = av_malloc(size + 1)))
1069		✗	return AVERROR(ENOMEM);
1070	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2332 times.	2332	if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
1071		✗	av_free(res);
1072		✗	return ret < 0 ? ret : NEEDS_CHECKING;
1073			}
1074		2332	(res)[size] = '\0';
1075			}
1076		2332	av_free(*str);
1077		2332	*str = res;
1078
1079		2332	return 0;
1080			}
1081
1082			/*
1083			* Read the next element as binary data.
1084			* 0 is success, < 0 or NEEDS_CHECKING is failure.
1085			*/
1086		31040	static int ebml_read_binary(AVIOContext *pb, int length,
1087			int64_t pos, EbmlBin *bin)
1088			{
1089			int ret;
1090
1091		31040	ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1092	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31040 times.	31040	if (ret < 0)
1093		✗	return ret;
1094		31040	memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1095
1096		31040	bin->data = bin->buf->data;
1097		31040	bin->size = length;
1098		31040	bin->pos = pos;
1099	2/2 ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 31030 times.	31040	if ((ret = avio_read(pb, bin->data, length)) != length) {
1100		10	av_buffer_unref(&bin->buf);
1101		10	bin->data = NULL;
1102		10	bin->size = 0;
1103	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	return ret < 0 ? ret : NEEDS_CHECKING;
1104			}
1105
1106		31030	return 0;
1107			}
1108
1109			/*
1110			* Read the next element, but only the header. The contents
1111			* are supposed to be sub-elements which can be read separately.
1112			* 0 is success, < 0 is failure.
1113			*/
1114		7773	static int ebml_read_master(MatroskaDemuxContext *matroska,
1115			uint64_t length, int64_t pos)
1116			{
1117			MatroskaLevel *level;
1118
1119	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7773 times.	7773	if (matroska->num_levels >= EBML_MAX_DEPTH) {
1120		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1121			"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1122		✗	return AVERROR(ENOSYS);
1123			}
1124
1125		7773	level = &matroska->levels[matroska->num_levels++];
1126		7773	level->start = pos;
1127		7773	level->length = length;
1128
1129		7773	return 0;
1130			}
1131
1132			/*
1133			* Read a signed "EBML number"
1134			* Return: number of bytes processed, < 0 on error
1135			*/
1136		236	static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1137			AVIOContext *pb, int64_t *num)
1138			{
1139			uint64_t unum;
1140			int res;
1141
1142			/* read as unsigned number first */
1143	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 236 times.	236	if ((res = ebml_read_num(matroska, pb, 8, &unum, 1)) < 0)
1144		✗	return res;
1145
1146			/* make signed (weird way) */
1147		236	*num = unum - ((1LL << (7 * res - 1)) - 1);
1148
1149		236	return res;
1150			}
1151
1152			static int ebml_parse(MatroskaDemuxContext *matroska,
1153			EbmlSyntax *syntax, void *data);
1154
1155		57706	static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1156			{
1157			int i;
1158
1159			// Whoever touches this should be aware of the duplication
1160			// existing in matroska_cluster_parsing.
1161	2/2 ✓ Branch 0 taken 120097 times. ✓ Branch 1 taken 735 times.	120832	for (i = 0; syntax[i].id; i++)
1162	2/2 ✓ Branch 0 taken 56971 times. ✓ Branch 1 taken 63126 times.	120097	if (id == syntax[i].id)
1163		56971	break;
1164
1165		57706	return &syntax[i];
1166			}
1167
1168		7773	static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1169			void *data)
1170			{
1171			int res;
1172
1173	1/2 ✓ Branch 0 taken 7773 times. ✗ Branch 1 not taken.	7773	if (data) {
1174	2/2 ✓ Branch 0 taken 49286 times. ✓ Branch 1 taken 7773 times.	57059	for (int i = 0; syntax[i].id; i++) {
1175		49286	void *dst = (char *)data + syntax[i].data_offset;
1176	5/5 ✓ Branch 0 taken 21198 times. ✓ Branch 1 taken 968 times. ✓ Branch 2 taken 1415 times. ✓ Branch 3 taken 3974 times. ✓ Branch 4 taken 21731 times.	49286	switch (syntax[i].type) {
1177		21198	case EBML_UINT:
1178		21198	*(uint64_t *)dst = syntax[i].def.u;
1179		21198	break;
1180		968	case EBML_SINT:
1181		968	*(int64_t *) dst = syntax[i].def.i;
1182		968	break;
1183		1415	case EBML_FLOAT:
1184		1415	*(double *) dst = syntax[i].def.f;
1185		1415	break;
1186		3974	case EBML_STR:
1187			case EBML_UTF8:
1188			// the default may be NULL
1189	2/2 ✓ Branch 0 taken 1245 times. ✓ Branch 1 taken 2729 times.	3974	if (syntax[i].def.s) {
1190		1245	*(char**)dst = av_strdup(syntax[i].def.s);
1191	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1245 times.	1245	if (!*(char**)dst)
1192		✗	return AVERROR(ENOMEM);
1193			}
1194		3974	break;
1195			}
1196			}
1197
1198	2/2 ✓ Branch 0 taken 51 times. ✓ Branch 1 taken 7722 times.	7773	if (!matroska->levels[matroska->num_levels - 1].length) {
1199		51	matroska->num_levels--;
1200		51	return 0;
1201			}
1202			}
1203
1204			do {
1205		24280	res = ebml_parse(matroska, syntax, data);
1206	2/2 ✓ Branch 0 taken 16558 times. ✓ Branch 1 taken 7722 times.	24280	} while (!res);
1207
1208	2/2 ✓ Branch 0 taken 1170 times. ✓ Branch 1 taken 6552 times.	7722	return res == LEVEL_ENDED ? 0 : res;
1209			}
1210
1211		2419	static int is_ebml_id_valid(uint32_t id)
1212			{
1213			// Due to endian nonsense in Matroska, the highest byte with any bits set
1214			// will contain the leading length bit. This bit in turn identifies the
1215			// total byte length of the element by its position within the byte.
1216		2419	unsigned int bits = av_log2(id);
1217	2/4 ✓ Branch 0 taken 2419 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 2419 times. ✗ Branch 3 not taken.	2419	return id && (bits + 7) / 8 == (8 - bits % 8);
1218			}
1219
1220			/*
1221			* Allocate and return the entry for the level1 element with the given ID. If
1222			* an entry already exists, return the existing entry.
1223			*/
1224		2419	static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1225			uint32_t id, int64_t pos)
1226			{
1227			int i;
1228			MatroskaLevel1Element *elem;
1229
1230	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2419 times.	2419	if (!is_ebml_id_valid(id))
1231		✗	return NULL;
1232
1233			// Some files link to all clusters; useless.
1234	2/2 ✓ Branch 0 taken 25 times. ✓ Branch 1 taken 2394 times.	2419	if (id == MATROSKA_ID_CLUSTER)
1235		25	return NULL;
1236
1237			// There can be multiple SeekHeads and Tags.
1238	2/2 ✓ Branch 0 taken 4897 times. ✓ Branch 1 taken 1548 times.	6445	for (i = 0; i < matroska->num_level1_elems; i++) {
1239	2/2 ✓ Branch 0 taken 854 times. ✓ Branch 1 taken 4043 times.	4897	if (matroska->level1_elems[i].id == id) {
1240	3/4 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 846 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 8 times.	854	if (matroska->level1_elems[i].pos == pos ||
1241		✗	id != MATROSKA_ID_SEEKHEAD && id != MATROSKA_ID_TAGS)
1242		846	return &matroska->level1_elems[i];
1243			}
1244			}
1245
1246			// Only a completely broken file would have more elements.
1247	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1548 times.	1548	if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1248		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements.\n");
1249		✗	return NULL;
1250			}
1251
1252		1548	elem = &matroska->level1_elems[matroska->num_level1_elems++];
1253		1548	*elem = (MatroskaLevel1Element){.id = id};
1254
1255		1548	return elem;
1256			}
1257
1258		57717	static int ebml_parse(MatroskaDemuxContext *matroska,
1259			EbmlSyntax *syntax, void *data)
1260			{
1261			static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1262			// Forbid unknown-length EBML_NONE elements.
1263			[EBML_NONE] = EBML_UNKNOWN_LENGTH - 1,
1264			[EBML_UINT] = 8,
1265			[EBML_SINT] = 8,
1266			[EBML_FLOAT] = 8,
1267			// max. 16 MB for strings
1268			[EBML_STR] = 0x1000000,
1269			[EBML_UTF8] = 0x1000000,
1270			// max. 256 MB for binary data
1271			[EBML_BIN] = 0x10000000,
1272			// no limits for anything else
1273			};
1274		57717	AVIOContext *pb = matroska->ctx->pb;
1275			uint32_t id;
1276			uint64_t length;
1277		57717	int64_t pos = avio_tell(pb), pos_alt;
1278		57717	int res, update_pos = 1, level_check;
1279			MatroskaLevel1Element *level1_elem;
1280	2/2 ✓ Branch 0 taken 56977 times. ✓ Branch 1 taken 740 times.	57717	MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1281
1282	2/2 ✓ Branch 0 taken 55756 times. ✓ Branch 1 taken 1961 times.	57717	if (!matroska->current_id) {
1283			uint64_t id;
1284		55756	res = ebml_read_num(matroska, pb, 4, &id, 0);
1285	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 55742 times.	55756	if (res < 0) {
1286	2/4 ✓ Branch 0 taken 14 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 14 times. ✗ Branch 3 not taken.	14	if (pb->eof_reached && res == AVERROR_EOF) {
1287	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 10 times.	14	if (matroska->is_live)
1288			// in live mode, finish parsing if EOF is reached.
1289		14	return 1;
1290	2/4 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken. ✓ Branch 3 taken 10 times. ✗ Branch 4 not taken.	10	if (level && pos == avio_tell(pb)) {
1291	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	if (level->length == EBML_UNKNOWN_LENGTH) {
1292			// Unknown-length levels automatically end at EOF.
1293		10	matroska->num_levels--;
1294		10	return LEVEL_ENDED;
1295			} else {
1296		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1297			"at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1298			}
1299			}
1300			}
1301		✗	return res;
1302			}
1303		55742	matroska->current_id = id | 1 << 7 * res;
1304		55742	pos_alt = pos + res;
1305			} else {
1306		1961	pos_alt = pos;
1307		1961	pos -= (av_log2(matroska->current_id) + 7) / 8;
1308			}
1309
1310		57703	id = matroska->current_id;
1311
1312		57703	syntax = ebml_parse_id(syntax, id);
1313	6/6 ✓ Branch 0 taken 735 times. ✓ Branch 1 taken 56968 times. ✓ Branch 2 taken 510 times. ✓ Branch 3 taken 225 times. ✓ Branch 4 taken 44 times. ✓ Branch 5 taken 466 times.	57703	if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1314	3/4 ✓ Branch 0 taken 44 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✓ Branch 3 taken 37 times.	44	if (level && level->length == EBML_UNKNOWN_LENGTH) {
1315			// Unknown-length levels end when an element from an upper level
1316			// in the hierarchy is encountered.
1317	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 4 times.	7	while (syntax->def.n) {
1318		3	syntax = ebml_parse_id(syntax->def.n, id);
1319	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (syntax->id) {
1320		3	matroska->num_levels--;
1321		3	return LEVEL_ENDED;
1322			}
1323			// We have not encountered a known element; syntax is a sentinel.
1324			av_assert1(syntax->type == EBML_NONE);
1325			};
1326			}
1327
1328		41	av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1329			"%"PRId64"\n", id, pos);
1330		41	update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1331			}
1332
1333	2/2 ✓ Branch 0 taken 56563 times. ✓ Branch 1 taken 1137 times.	57700	if (data) {
1334		56563	data = (char *) data + syntax->data_offset;
1335	2/2 ✓ Branch 0 taken 3697 times. ✓ Branch 1 taken 52866 times.	56563	if (syntax->list_elem_size) {
1336		3697	EbmlList *list = data;
1337			void *newelem;
1338
1339	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3697 times.	3697	if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1340		✗	return AVERROR(ENOMEM);
1341		3697	newelem = av_fast_realloc(list->elem,
1342			&list->alloc_elem_size,
1343		3697	(list->nb_elem + 1) * syntax->list_elem_size);
1344	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3697 times.	3697	if (!newelem)
1345		✗	return AVERROR(ENOMEM);
1346		3697	list->elem = newelem;
1347		3697	data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1348		3697	memset(data, 0, syntax->list_elem_size);
1349		3697	list->nb_elem++;
1350			}
1351			}
1352
1353	2/2 ✓ Branch 0 taken 55734 times. ✓ Branch 1 taken 1966 times.	57700	if (syntax->type != EBML_STOP) {
1354		55734	matroska->current_id = 0;
1355	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 55734 times.	55734	if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1356		✗	return res;
1357
1358		55734	pos_alt += res;
1359
1360	2/2 ✓ Branch 0 taken 54994 times. ✓ Branch 1 taken 740 times.	55734	if (matroska->num_levels > 0) {
1361	2/2 ✓ Branch 0 taken 54988 times. ✓ Branch 1 taken 6 times.	54994	if (length != EBML_UNKNOWN_LENGTH &&
1362	2/2 ✓ Branch 0 taken 54878 times. ✓ Branch 1 taken 110 times.	109866	level->length != EBML_UNKNOWN_LENGTH) {
1363		54878	uint64_t elem_end = pos_alt + length,
1364		54878	level_end = level->start + level->length;
1365
1366	2/2 ✓ Branch 0 taken 47305 times. ✓ Branch 1 taken 7573 times.	54878	if (elem_end < level_end) {
1367		47305	level_check = 0;
1368	1/2 ✓ Branch 0 taken 7573 times. ✗ Branch 1 not taken.	7573	} else if (elem_end == level_end) {
1369		7573	level_check = LEVEL_ENDED;
1370			} else {
1371		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1372			"Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1373			"containing master element ending at 0x%"PRIx64"\n",
1374			pos, elem_end, level_end);
1375		✗	return AVERROR_INVALIDDATA;
1376			}
1377	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 6 times.	116	} else if (length != EBML_UNKNOWN_LENGTH) {
1378		110	level_check = 0;
1379	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	} else if (level->length != EBML_UNKNOWN_LENGTH) {
1380		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1381			"at 0x%"PRIx64" inside parent with finite size\n", pos);
1382		✗	return AVERROR_INVALIDDATA;
1383			} else {
1384		6	level_check = 0;
1385	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	6	if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1386	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	|| syntax->type == EBML_NEST)) {
1387			// According to the current specifications only clusters and
1388			// segments are allowed to be unknown-length. We also accept
1389			// other unknown-length master elements.
1390		✗	av_log(matroska->ctx, AV_LOG_WARNING,
1391			"Found unknown-length element 0x%"PRIX32" other than "
1392			"a cluster at 0x%"PRIx64". Spec-incompliant, but "
1393			"parsing will nevertheless be attempted.\n", id, pos);
1394		✗	update_pos = -1;
1395			}
1396			}
1397			} else
1398		740	level_check = 0;
1399
1400	4/4 ✓ Branch 0 taken 47633 times. ✓ Branch 1 taken 8101 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 47631 times.	55734	if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1401	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (length != EBML_UNKNOWN_LENGTH) {
1402		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1403			"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1404			"with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1405		✗	length, max_lengths[syntax->type], id, pos);
1406	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	} else if (syntax->type != EBML_NONE) {
1407		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1408			"Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1409			"unknown length, yet the length of an element of its "
1410			"type must be known.\n", id, pos);
1411			} else {
1412		2	av_log(matroska->ctx, AV_LOG_ERROR,
1413			"Found unknown-length element with ID 0x%"PRIX32" at "
1414			"pos. 0x%"PRIx64" for which no syntax for parsing is "
1415			"available.\n", id, pos);
1416			}
1417		2	return AVERROR_INVALIDDATA;
1418			}
1419
1420	2/2 ✓ Branch 0 taken 130 times. ✓ Branch 1 taken 55602 times.	55732	if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1421			// Loosing sync will likely manifest itself as encountering unknown
1422			// elements which are not reliably distinguishable from elements
1423			// belonging to future extensions of the format.
1424			// We use a heuristic to detect such situations: If the current
1425			// element is not expected at the current syntax level and there
1426			// were only a few unknown elements in a row, then the element is
1427			// skipped or considered defective based upon the length of the
1428			// current element (i.e. how much would be skipped); if there were
1429			// more than a few skipped elements in a row and skipping the current
1430			// element would lead us more than SKIP_THRESHOLD away from the last
1431			// known good position, then it is inferred that an error occurred.
1432			// The dependency on the number of unknown elements in a row exists
1433			// because the distance to the last known good position is
1434			// automatically big if the last parsed element was big.
1435			// In both cases, each unknown element is considered equivalent to
1436			// UNKNOWN_EQUIV of skipped bytes for the check.
1437			// The whole check is only done for non-seekable output, because
1438			// in this situation skipped data can't simply be rechecked later.
1439			// This is especially important when using unkown length elements
1440			// as the check for whether a child exceeds its containing master
1441			// element is not effective in this situation.
1442	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 2 times.	130	if (update_pos) {
1443		128	matroska->unknown_count = 0;
1444			} else {
1445		2	int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1446
1447	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (matroska->unknown_count > 3)
1448		✗	dist += pos_alt - matroska->resync_pos;
1449
1450	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (dist > SKIP_THRESHOLD) {
1451		✗	av_log(matroska->ctx, AV_LOG_ERROR,
1452			"Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1453			"length 0x%"PRIx64" considered as invalid data. Last "
1454			"known good position 0x%"PRIx64", %d unknown elements"
1455			" in a row\n", id, pos, length, matroska->resync_pos,
1456			matroska->unknown_count);
1457		✗	return AVERROR_INVALIDDATA;
1458			}
1459			}
1460			}
1461
1462	2/2 ✓ Branch 0 taken 55693 times. ✓ Branch 1 taken 39 times.	55732	if (update_pos > 0) {
1463			// We have found an element that is allowed at this place
1464			// in the hierarchy and it passed all checks, so treat the beginning
1465			// of the element as the "last known good" position.
1466		55693	matroska->resync_pos = pos;
1467			}
1468
1469	3/4 ✓ Branch 0 taken 335 times. ✓ Branch 1 taken 55397 times. ✓ Branch 2 taken 335 times. ✗ Branch 3 not taken.	55732	if (!data && length != EBML_UNKNOWN_LENGTH)
1470		335	goto skip;
1471			}
1472
1473	8/8 ✓ Branch 0 taken 10649 times. ✓ Branch 1 taken 160 times. ✓ Branch 2 taken 746 times. ✓ Branch 3 taken 2332 times. ✓ Branch 4 taken 31040 times. ✓ Branch 5 taken 7773 times. ✓ Branch 6 taken 1966 times. ✓ Branch 7 taken 2697 times.	57363	switch (syntax->type) {
1474		10649	case EBML_UINT:
1475		10649	res = ebml_read_uint(pb, length, syntax->def.u, data);
1476		10649	break;
1477		160	case EBML_SINT:
1478		160	res = ebml_read_sint(pb, length, syntax->def.i, data);
1479		160	break;
1480		746	case EBML_FLOAT:
1481		746	res = ebml_read_float(pb, length, syntax->def.f, data);
1482		746	break;
1483		2332	case EBML_STR:
1484			case EBML_UTF8:
1485		2332	res = ebml_read_ascii(pb, length, syntax->def.s, data);
1486		2332	break;
1487		31040	case EBML_BIN:
1488		31040	res = ebml_read_binary(pb, length, pos_alt, data);
1489		31040	break;
1490		7773	case EBML_LEVEL1:
1491			case EBML_NEST:
1492	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7773 times.	7773	if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1493		✗	return res;
1494	2/2 ✓ Branch 0 taken 370 times. ✓ Branch 1 taken 7403 times.	7773	if (id == MATROSKA_ID_SEGMENT)
1495		370	matroska->segment_start = pos_alt;
1496	2/2 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 7753 times.	7773	if (id == MATROSKA_ID_CUES)
1497		20	matroska->cues_parsing_deferred = 0;
1498	3/4 ✓ Branch 0 taken 1231 times. ✓ Branch 1 taken 6542 times. ✓ Branch 2 taken 1231 times. ✗ Branch 3 not taken.	9004	if (syntax->type == EBML_LEVEL1 &&
1499		1231	(level1_elem = matroska_find_level1_elem(matroska, syntax->id, pos))) {
1500	2/2 ✓ Branch 0 taken 1209 times. ✓ Branch 1 taken 22 times.	1231	if (!level1_elem->pos) {
1501			// Zero is not a valid position for a level 1 element.
1502		1209	level1_elem->pos = pos;
1503	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 22 times.	22	} else if (level1_elem->pos != pos)
1504		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1505		1231	level1_elem->parsed = 1;
1506			}
1507	2/2 ✓ Branch 1 taken 1170 times. ✓ Branch 2 taken 6603 times.	7773	if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1508		1170	return res;
1509		6603	break;
1510		1966	case EBML_STOP:
1511		1966	return 1;
1512		335	skip:
1513		3032	default:
1514	2/2 ✓ Branch 0 taken 3030 times. ✓ Branch 1 taken 2 times.	3032	if (length) {
1515			int64_t res2;
1516	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3030 times.	3030	if (ffio_limit(pb, length) != length) {
1517			// ffio_limit emits its own error message,
1518			// so we don't have to.
1519		✗	return AVERROR(EIO);
1520			}
1521	1/2 ✓ Branch 1 taken 3030 times. ✗ Branch 2 not taken.	3030	if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1522			// avio_skip might take us past EOF. We check for this
1523			// by skipping only length - 1 bytes, reading a byte and
1524			// checking the error flags. This is done in order to check
1525			// that the element has been properly skipped even when
1526			// no filesize (that ffio_limit relies on) is available.
1527		3030	avio_r8(pb);
1528		3030	res = NEEDS_CHECKING;
1529			} else
1530		✗	res = res2;
1531			} else
1532		2	res = 0;
1533			}
1534	2/2 ✓ Branch 0 taken 14595 times. ✓ Branch 1 taken 39967 times.	54562	if (res) {
1535	1/2 ✓ Branch 0 taken 14595 times. ✗ Branch 1 not taken.	14595	if (res == NEEDS_CHECKING) {
1536	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 14585 times.	14595	if (pb->eof_reached) {
1537	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (pb->error)
1538		✗	res = pb->error;
1539			else
1540		10	res = AVERROR_EOF;
1541			} else
1542		14585	goto level_check;
1543			}
1544
1545	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (res == AVERROR_INVALIDDATA)
1546		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1547	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	else if (res == AVERROR(EIO))
1548		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1549	1/2 ✓ Branch 0 taken 10 times. ✗ Branch 1 not taken.	10	else if (res == AVERROR_EOF) {
1550		10	av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1551		10	res = AVERROR(EIO);
1552			}
1553
1554		10	return res;
1555			}
1556
1557		39967	level_check:
1558	3/4 ✓ Branch 0 taken 144 times. ✓ Branch 1 taken 54408 times. ✓ Branch 2 taken 144 times. ✗ Branch 3 not taken.	54552	if (syntax->is_counted && data) {
1559		144	CountedElement *elem = data;
1560	1/2 ✓ Branch 0 taken 144 times. ✗ Branch 1 not taken.	144	if (elem->count != UINT_MAX)
1561		144	elem->count++;
1562			}
1563
1564	4/4 ✓ Branch 0 taken 7508 times. ✓ Branch 1 taken 47044 times. ✓ Branch 2 taken 7478 times. ✓ Branch 3 taken 30 times.	54552	if (level_check == LEVEL_ENDED && matroska->num_levels) {
1565		7478	level = &matroska->levels[matroska->num_levels - 1];
1566		7478	pos = avio_tell(pb);
1567
1568			// Given that pos >= level->start no check for
1569			// level->length != EBML_UNKNOWN_LENGTH is necessary.
1570	4/4 ✓ Branch 0 taken 14307 times. ✓ Branch 1 taken 727 times. ✓ Branch 2 taken 7556 times. ✓ Branch 3 taken 6751 times.	15034	while (matroska->num_levels && pos == level->start + level->length) {
1571		7556	matroska->num_levels--;
1572		7556	level--;
1573			}
1574			}
1575
1576		54552	return level_check;
1577			}
1578
1579		72168	static void ebml_free(EbmlSyntax *syntax, void *data)
1580			{
1581			int i, j;
1582	2/2 ✓ Branch 0 taken 298927 times. ✓ Branch 1 taken 72168 times.	371095	for (i = 0; syntax[i].id; i++) {
1583		298927	void *data_off = (char *) data + syntax[i].data_offset;
1584	4/4 ✓ Branch 0 taken 3968 times. ✓ Branch 1 taken 32592 times. ✓ Branch 2 taken 72890 times. ✓ Branch 3 taken 189477 times.	298927	switch (syntax[i].type) {
1585		3968	case EBML_STR:
1586			case EBML_UTF8:
1587		3968	av_freep(data_off);
1588		3968	break;
1589		32592	case EBML_BIN:
1590		32592	av_buffer_unref(&((EbmlBin *) data_off)->buf);
1591		32592	break;
1592		72890	case EBML_LEVEL1:
1593			case EBML_NEST:
1594	2/2 ✓ Branch 0 taken 35888 times. ✓ Branch 1 taken 37002 times.	72890	if (syntax[i].list_elem_size) {
1595		35888	EbmlList *list = data_off;
1596		35888	char *ptr = list->elem;
1597	2/2 ✓ Branch 0 taken 3697 times. ✓ Branch 1 taken 35888 times.	39585	for (j = 0; j < list->nb_elem;
1598		3697	j++, ptr += syntax[i].list_elem_size)
1599		3697	ebml_free(syntax[i].def.n, ptr);
1600		35888	av_freep(&list->elem);
1601		35888	list->nb_elem = 0;
1602		35888	list->alloc_elem_size = 0;
1603			} else
1604		37002	ebml_free(syntax[i].def.n, data_off);
1605			default:
1606		262367	break;
1607			}
1608			}
1609		72168	}
1610
1611			/*
1612			* Autodetecting...
1613			*/
1614		7211	static int matroska_probe(const AVProbeData *p)
1615			{
1616		7211	uint64_t total = 0;
1617		7211	int len_mask = 0x80, size = 1, n = 1, i;
1618
1619			/* EBML header? */
1620	2/2 ✓ Branch 0 taken 6863 times. ✓ Branch 1 taken 348 times.	7211	if (AV_RB32(p->buf) != EBML_ID_HEADER)
1621		6863	return 0;
1622
1623			/* length of header */
1624		348	total = p->buf[4];
1625	3/4 ✓ Branch 0 taken 2084 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 1736 times. ✓ Branch 3 taken 348 times.	2084	while (size <= 8 && !(total & len_mask)) {
1626		1736	size++;
1627		1736	len_mask >>= 1;
1628			}
1629	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 348 times.	348	if (size > 8)
1630		✗	return 0;
1631		348	total &= (len_mask - 1);
1632	2/2 ✓ Branch 0 taken 1736 times. ✓ Branch 1 taken 348 times.	2084	while (n < size)
1633		1736	total = (total << 8) | p->buf[4 + n++];
1634
1635	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 348 times.	348	if (total + 1 == 1ULL << (7 * size)){
1636			/* Unknown-length header - simply parse the whole buffer. */
1637		✗	total = p->buf_size - 4 - size;
1638			} else {
1639			/* Does the probe data contain the whole header? */
1640	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 348 times.	348	if (p->buf_size < 4 + size + total)
1641		✗	return 0;
1642			}
1643
1644			/* The header should contain a known document type. For now,
1645			* we don't parse the whole header but simply check for the
1646			* availability of that array of characters inside the header.
1647			* Not fully fool-proof, but good enough. */
1648	1/2 ✓ Branch 0 taken 599 times. ✗ Branch 1 not taken.	599	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1649		599	size_t probelen = strlen(matroska_doctypes[i]);
1650	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 599 times.	599	if (total < probelen)
1651		✗	continue;
1652	2/2 ✓ Branch 0 taken 12942 times. ✓ Branch 1 taken 251 times.	13193	for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1653	2/2 ✓ Branch 0 taken 348 times. ✓ Branch 1 taken 12594 times.	12942	if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1654		348	return AVPROBE_SCORE_MAX;
1655			}
1656
1657			// probably valid EBML header but no recognized doctype
1658		✗	return AVPROBE_SCORE_EXTENSION;
1659			}
1660
1661		31370	static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1662			uint64_t num)
1663			{
1664		31370	MatroskaTrack *tracks = matroska->tracks.elem;
1665			int i;
1666
1667	2/2 ✓ Branch 0 taken 34467 times. ✓ Branch 1 taken 1 times.	34468	for (i = 0; i < matroska->tracks.nb_elem; i++)
1668	2/2 ✓ Branch 0 taken 31369 times. ✓ Branch 1 taken 3098 times.	34467	if (tracks[i].num == num)
1669		31369	return &tracks[i];
1670
1671		1	av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1672		1	return NULL;
1673			}
1674
1675		82	static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1676			MatroskaTrack *track)
1677			{
1678		82	MatroskaTrackEncoding *encodings = track->encodings.elem;
1679		82	uint8_t *data = *buf;
1680		82	int isize = *buf_size;
1681		82	uint8_t *pkt_data = NULL;
1682			uint8_t av_unused *newpktdata;
1683		82	int pkt_size = isize;
1684		82	int result = 0;
1685			int olen;
1686
1687	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 82 times.	82	if (pkt_size >= 10000000U)
1688		✗	return AVERROR_INVALIDDATA;
1689
1690	4/5 ✓ Branch 0 taken 70 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 6 times. ✓ Branch 3 taken 2 times. ✗ Branch 4 not taken.	82	switch (encodings[0].compression.algo) {
1691		70	case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1692			{
1693		70	int header_size = encodings[0].compression.settings.size;
1694		70	uint8_t *header = encodings[0].compression.settings.data;
1695
1696	2/4 ✓ Branch 0 taken 70 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 70 times.	70	if (header_size && !header) {
1697		✗	av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1698		✗	return -1;
1699			}
1700
1701	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!header_size)
1702		✗	return 0;
1703
1704		70	pkt_size = isize + header_size;
1705		70	pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1706	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 70 times.	70	if (!pkt_data)
1707		✗	return AVERROR(ENOMEM);
1708
1709		70	memcpy(pkt_data, header, header_size);
1710		70	memcpy(pkt_data + header_size, data, isize);
1711		70	break;
1712			}
1713		15	case MATROSKA_TRACK_ENCODING_COMP_LZO:
1714			do {
1715		15	int insize = isize;
1716		15	olen = pkt_size *= 3;
1717		15	newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1718		15	+ AV_INPUT_BUFFER_PADDING_SIZE);
1719	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 15 times.	15	if (!newpktdata) {
1720		✗	result = AVERROR(ENOMEM);
1721		✗	goto failed;
1722			}
1723		15	pkt_data = newpktdata;
1724		15	result = av_lzo1x_decode(pkt_data, &olen, data, &insize);
1725	3/4 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 11 times. ✗ Branch 3 not taken.	15	} while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1726	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (result) {
1727		✗	result = AVERROR_INVALIDDATA;
1728		✗	goto failed;
1729			}
1730		4	pkt_size -= olen;
1731		4	break;
1732			#if CONFIG_ZLIB
1733		6	case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1734			{
1735		6	z_stream zstream = { 0 };
1736	2/4 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 6 times.	6	if (!pkt_size || inflateInit(&zstream) != Z_OK)
1737		✗	return -1;
1738		6	zstream.next_in = data;
1739		6	zstream.avail_in = isize;
1740			do {
1741		8	pkt_size *= 3;
1742		8	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1743	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (!newpktdata) {
1744		✗	inflateEnd(&zstream);
1745		✗	result = AVERROR(ENOMEM);
1746		✗	goto failed;
1747			}
1748		8	pkt_data = newpktdata;
1749		8	zstream.avail_out = pkt_size - zstream.total_out;
1750		8	zstream.next_out = pkt_data + zstream.total_out;
1751		8	result = inflate(&zstream, Z_NO_FLUSH);
1752	3/4 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 6 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	8	} while (result == Z_OK && pkt_size < 10000000);
1753		6	pkt_size = zstream.total_out;
1754		6	inflateEnd(&zstream);
1755	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (result != Z_STREAM_END) {
1756		✗	if (result == Z_MEM_ERROR)
1757		✗	result = AVERROR(ENOMEM);
1758			else
1759		✗	result = AVERROR_INVALIDDATA;
1760		✗	goto failed;
1761			}
1762		6	break;
1763			}
1764			#endif
1765			#if CONFIG_BZLIB
1766		2	case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1767			{
1768		2	bz_stream bzstream = { 0 };
1769	2/4 ✓ Branch 0 taken 2 times. ✗ Branch 1 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 2 times.	2	if (!pkt_size || BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1770		✗	return -1;
1771		2	bzstream.next_in = data;
1772		2	bzstream.avail_in = isize;
1773			do {
1774		6	pkt_size *= 3;
1775		6	newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1776	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!newpktdata) {
1777		✗	BZ2_bzDecompressEnd(&bzstream);
1778		✗	result = AVERROR(ENOMEM);
1779		✗	goto failed;
1780			}
1781		6	pkt_data = newpktdata;
1782		6	bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1783		6	bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1784		6	result = BZ2_bzDecompress(&bzstream);
1785	3/4 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	6	} while (result == BZ_OK && pkt_size < 10000000);
1786		2	pkt_size = bzstream.total_out_lo32;
1787		2	BZ2_bzDecompressEnd(&bzstream);
1788	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (result != BZ_STREAM_END) {
1789		✗	if (result == BZ_MEM_ERROR)
1790		✗	result = AVERROR(ENOMEM);
1791			else
1792		✗	result = AVERROR_INVALIDDATA;
1793		✗	goto failed;
1794			}
1795		2	break;
1796			}
1797			#endif
1798		✗	default:
1799		✗	return AVERROR_INVALIDDATA;
1800			}
1801
1802		82	memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1803
1804		82	*buf = pkt_data;
1805		82	*buf_size = pkt_size;
1806		82	return 0;
1807
1808		✗	failed:
1809		✗	av_free(pkt_data);
1810		✗	return result;
1811			}
1812
1813		201	static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1814			AVDictionary **metadata, char *prefix)
1815			{
1816		201	MatroskaTag *tags = list->elem;
1817			char key[1024];
1818			int i;
1819
1820	2/2 ✓ Branch 0 taken 434 times. ✓ Branch 1 taken 201 times.	635	for (i = 0; i < list->nb_elem; i++) {
1821		1302	const char *lang = tags[i].lang &&
1822	3/4 ✓ Branch 0 taken 434 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 45 times. ✓ Branch 3 taken 389 times.	434	strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1823
1824	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 434 times.	434	if (!tags[i].name) {
1825		✗	av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1826		✗	continue;
1827			}
1828	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 434 times.	434	if (prefix)
1829		✗	snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1830			else
1831		434	av_strlcpy(key, tags[i].name, sizeof(key));
1832	3/4 ✓ Branch 0 taken 434 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 389 times. ✓ Branch 3 taken 45 times.	434	if (tags[i].def || !lang) {
1833		389	av_dict_set(metadata, key, tags[i].string, 0);
1834	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 389 times.	389	if (tags[i].sub.nb_elem)
1835		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1836			}
1837	2/2 ✓ Branch 0 taken 45 times. ✓ Branch 1 taken 389 times.	434	if (lang) {
1838		45	av_strlcat(key, "-", sizeof(key));
1839		45	av_strlcat(key, lang, sizeof(key));
1840		45	av_dict_set(metadata, key, tags[i].string, 0);
1841	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (tags[i].sub.nb_elem)
1842		✗	matroska_convert_tag(s, &tags[i].sub, metadata, key);
1843			}
1844			}
1845		201	ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1846		201	}
1847
1848		370	static void matroska_convert_tags(AVFormatContext *s)
1849			{
1850		370	MatroskaDemuxContext *matroska = s->priv_data;
1851		370	MatroskaTags *tags = matroska->tags.elem;
1852			int i, j;
1853
1854	2/2 ✓ Branch 0 taken 201 times. ✓ Branch 1 taken 370 times.	571	for (i = 0; i < matroska->tags.nb_elem; i++) {
1855	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 198 times.	201	if (tags[i].target.attachuid) {
1856		3	MatroskaAttachment *attachment = matroska->attachments.elem;
1857		3	int found = 0;
1858	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	for (j = 0; j < matroska->attachments.nb_elem; j++) {
1859	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (attachment[j].uid == tags[i].target.attachuid &&
1860	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	attachment[j].stream) {
1861		3	matroska_convert_tag(s, &tags[i].tag,
1862		3	&attachment[j].stream->metadata, NULL);
1863		3	found = 1;
1864			}
1865			}
1866	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1867		✗	av_log(s, AV_LOG_WARNING,
1868			"The tags at index %d refer to a "
1869			"non-existent attachment %"PRId64".\n",
1870		✗	i, tags[i].target.attachuid);
1871			}
1872	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 195 times.	198	} else if (tags[i].target.chapteruid) {
1873		3	MatroskaChapter *chapter = matroska->chapters.elem;
1874		3	int found = 0;
1875	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 3 times.	9	for (j = 0; j < matroska->chapters.nb_elem; j++) {
1876	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 3 times.	6	if (chapter[j].uid == tags[i].target.chapteruid &&
1877	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	chapter[j].chapter) {
1878		3	matroska_convert_tag(s, &tags[i].tag,
1879		3	&chapter[j].chapter->metadata, NULL);
1880		3	found = 1;
1881			}
1882			}
1883	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!found) {
1884		✗	av_log(s, AV_LOG_WARNING,
1885			"The tags at index %d refer to a non-existent chapter "
1886			"%"PRId64".\n",
1887		✗	i, tags[i].target.chapteruid);
1888			}
1889	2/2 ✓ Branch 0 taken 144 times. ✓ Branch 1 taken 51 times.	195	} else if (tags[i].target.trackuid) {
1890		144	MatroskaTrack *track = matroska->tracks.elem;
1891		144	int found = 0;
1892	2/2 ✓ Branch 0 taken 380 times. ✓ Branch 1 taken 144 times.	524	for (j = 0; j < matroska->tracks.nb_elem; j++) {
1893	2/2 ✓ Branch 0 taken 144 times. ✓ Branch 1 taken 236 times.	380	if (track[j].uid == tags[i].target.trackuid &&
1894	1/2 ✓ Branch 0 taken 144 times. ✗ Branch 1 not taken.	144	track[j].stream) {
1895		144	matroska_convert_tag(s, &tags[i].tag,
1896		144	&track[j].stream->metadata, NULL);
1897		144	found = 1;
1898			}
1899			}
1900	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 144 times.	144	if (!found) {
1901		✗	av_log(s, AV_LOG_WARNING,
1902			"The tags at index %d refer to a non-existent track "
1903			"%"PRId64".\n",
1904		✗	i, tags[i].target.trackuid);
1905			}
1906			} else {
1907		51	matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1908		51	tags[i].target.type);
1909			}
1910			}
1911		370	}
1912
1913		24	static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1914			int64_t pos)
1915			{
1916		24	uint32_t saved_id = matroska->current_id;
1917		24	int64_t before_pos = avio_tell(matroska->ctx->pb);
1918		24	int ret = 0;
1919			int ret2;
1920
1921			/* seek */
1922	1/2 ✓ Branch 1 taken 24 times. ✗ Branch 2 not taken.	24	if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1923			/* We don't want to lose our seekhead level, so we add
1924			* a dummy. This is a crude hack. */
1925	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (matroska->num_levels == EBML_MAX_DEPTH) {
1926		✗	av_log(matroska->ctx, AV_LOG_INFO,
1927			"Max EBML element depth (%d) reached, "
1928			"cannot parse further.\n", EBML_MAX_DEPTH);
1929		✗	ret = AVERROR_INVALIDDATA;
1930			} else {
1931		24	matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1932		24	matroska->num_levels++;
1933		24	matroska->current_id = 0;
1934
1935		24	ret = ebml_parse(matroska, matroska_segment, matroska);
1936	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (ret == LEVEL_ENDED) {
1937			/* This can only happen if the seek brought us beyond EOF. */
1938		2	ret = AVERROR_EOF;
1939			}
1940			}
1941			}
1942			/* Seek back - notice that in all instances where this is used
1943			* it is safe to set the level to 1. */
1944		24	ret2 = matroska_reset_status(matroska, saved_id, before_pos);
1945	2/2 ✓ Branch 0 taken 22 times. ✓ Branch 1 taken 2 times.	24	if (ret >= 0)
1946		22	ret = ret2;
1947
1948		24	return ret;
1949			}
1950
1951		370	static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1952			{
1953		370	EbmlList *seekhead_list = &matroska->seekhead;
1954			int i;
1955
1956			// we should not do any seeking in the streaming case
1957	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 369 times.	370	if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1958		1	return;
1959
1960	2/2 ✓ Branch 0 taken 1188 times. ✓ Branch 1 taken 368 times.	1556	for (i = 0; i < seekhead_list->nb_elem; i++) {
1961		1188	MatroskaSeekhead *seekheads = seekhead_list->elem;
1962		1188	uint32_t id = seekheads[i].id;
1963		1188	int64_t pos = seekheads[i].pos + matroska->segment_start;
1964			MatroskaLevel1Element *elem;
1965
1966	2/4 ✓ Branch 0 taken 1188 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 1188 times.	1188	if (id != seekheads[i].id || pos < matroska->segment_start)
1967		✗	continue;
1968
1969		1188	elem = matroska_find_level1_elem(matroska, id, pos);
1970	4/4 ✓ Branch 0 taken 1163 times. ✓ Branch 1 taken 25 times. ✓ Branch 2 taken 824 times. ✓ Branch 3 taken 339 times.	1188	if (!elem || elem->parsed)
1971		849	continue;
1972
1973		339	elem->pos = pos;
1974
1975			// defer cues parsing until we actually need cue data.
1976	2/2 ✓ Branch 0 taken 327 times. ✓ Branch 1 taken 12 times.	339	if (id == MATROSKA_ID_CUES)
1977		327	continue;
1978
1979	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1980			// mark index as broken
1981		1	matroska->cues_parsing_deferred = -1;
1982		1	break;
1983			}
1984
1985		11	elem->parsed = 1;
1986			}
1987			}
1988
1989		383	static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1990			{
1991			EbmlList *index_list;
1992			MatroskaIndex *index;
1993		383	uint64_t index_scale = 1;
1994			int i, j;
1995
1996	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 383 times.	383	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1997		✗	return;
1998
1999		383	index_list = &matroska->index;
2000		383	index = index_list->elem;
2001	2/2 ✓ Branch 0 taken 365 times. ✓ Branch 1 taken 18 times.	383	if (index_list->nb_elem < 2)
2002		365	return;
2003	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 18 times.	18	if (index[1].time > 1E14 / matroska->time_scale) {
2004		✗	av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
2005		✗	return;
2006			}
2007	2/2 ✓ Branch 0 taken 538 times. ✓ Branch 1 taken 18 times.	556	for (i = 0; i < index_list->nb_elem; i++) {
2008		538	EbmlList *pos_list = &index[i].pos;
2009		538	MatroskaIndexPos *pos = pos_list->elem;
2010	2/2 ✓ Branch 0 taken 656 times. ✓ Branch 1 taken 538 times.	1194	for (j = 0; j < pos_list->nb_elem; j++) {
2011		656	MatroskaTrack *track = matroska_find_track_by_num(matroska,
2012		656	pos[j].track);
2013	2/4 ✓ Branch 0 taken 656 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 656 times. ✗ Branch 3 not taken.	656	if (track && track->stream)
2014		656	av_add_index_entry(track->stream,
2015		656	pos[j].pos + matroska->segment_start,
2016		656	index[i].time / index_scale, 0, 0,
2017			AVINDEX_KEYFRAME);
2018			}
2019			}
2020			}
2021
2022		13	static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
2023			int i;
2024
2025	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 13 times.	13	if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
2026		✗	return;
2027
2028	2/2 ✓ Branch 0 taken 53 times. ✓ Branch 1 taken 1 times.	54	for (i = 0; i < matroska->num_level1_elems; i++) {
2029		53	MatroskaLevel1Element *elem = &matroska->level1_elems[i];
2030	3/4 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 41 times. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken.	53	if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
2031	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 11 times.	12	if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
2032		1	matroska->cues_parsing_deferred = -1;
2033		12	elem->parsed = 1;
2034		12	break;
2035			}
2036			}
2037
2038		13	matroska_add_index_entries(matroska);
2039			}
2040
2041		441	static int matroska_parse_content_encodings(MatroskaTrackEncoding *encodings,
2042			unsigned nb_encodings,
2043			MatroskaTrack *track,
2044			char **key_id_base64, void *logctx)
2045			{
2046	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (nb_encodings > 1) {
2047		✗	av_log(logctx, AV_LOG_ERROR,
2048			"Multiple combined encodings not supported\n");
2049		✗	return 0;
2050			}
2051	2/2 ✓ Branch 0 taken 429 times. ✓ Branch 1 taken 12 times.	441	if (!nb_encodings)
2052		429	return 0;
2053	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (encodings->type) {
2054		✗	if (encodings->encryption.key_id.size > 0) {
2055			/* Save the encryption key id to be stored later
2056			* as a metadata tag. */
2057		✗	const int b64_size = AV_BASE64_SIZE(encodings->encryption.key_id.size);
2058		✗	*key_id_base64 = av_malloc(b64_size);
2059		✗	if (!*key_id_base64)
2060		✗	return AVERROR(ENOMEM);
2061
2062		✗	av_base64_encode(*key_id_base64, b64_size,
2063		✗	encodings->encryption.key_id.data,
2064			encodings->encryption.key_id.size);
2065			} else {
2066		✗	encodings->scope = 0;
2067		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2068			}
2069		12	} else if (
2070			#if CONFIG_ZLIB
2071	2/2 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 3 times.	12	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2072			#endif
2073			#if CONFIG_BZLIB
2074	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 1 times.	9	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2075			#endif
2076	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 1 times.	8	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2077	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	encodings->compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2078		✗	encodings->scope = 0;
2079		✗	av_log(logctx, AV_LOG_ERROR, "Unsupported encoding type\n");
2080	4/4 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 3 times. ✓ Branch 2 taken 1 times. ✓ Branch 3 taken 8 times.	12	} else if (track->codec_priv.size && encodings[0].scope & 2) {
2081		1	uint8_t *codec_priv = track->codec_priv.data;
2082		1	int ret = matroska_decode_buffer(&track->codec_priv.data,
2083			&track->codec_priv.size,
2084			track);
2085	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0) {
2086		✗	track->codec_priv.data = NULL;
2087		✗	track->codec_priv.size = 0;
2088		✗	av_log(logctx, AV_LOG_ERROR,
2089			"Failed to decode codec private data\n");
2090			}
2091
2092	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (codec_priv != track->codec_priv.data) {
2093		1	av_buffer_unref(&track->codec_priv.buf);
2094	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.data) {
2095		2	track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2096		1	track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2097			NULL, NULL, 0);
2098	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (!track->codec_priv.buf) {
2099		✗	av_freep(&track->codec_priv.data);
2100		✗	track->codec_priv.size = 0;
2101		✗	return AVERROR(ENOMEM);
2102			}
2103			}
2104			}
2105			}
2106		36	track->needs_decoding = !encodings->type &&
2107	2/4 ✓ Branch 0 taken 12 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 12 times. ✗ Branch 3 not taken.	24	encodings->scope & 1 &&
2108	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 5 times.	12	(encodings->compression.algo !=
2109		7	MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP ||
2110	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	encodings->compression.settings.size);
2111
2112		12	return 0;
2113			}
2114
2115		✗	static int matroska_aac_profile(char *codec_id)
2116			{
2117			static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
2118			int profile;
2119
2120		✗	for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
2121		✗	if (strstr(codec_id, aac_profiles[profile]))
2122		✗	break;
2123		✗	return profile + 1;
2124			}
2125
2126		✗	static int matroska_aac_sri(int samplerate)
2127			{
2128			int sri;
2129
2130		✗	for (sri = 0; sri < FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
2131		✗	if (ff_mpeg4audio_sample_rates[sri] == samplerate)
2132		✗	break;
2133		✗	return sri;
2134			}
2135
2136		18	static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
2137			{
2138			/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
2139		18	ff_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
2140		18	}
2141
2142		9	static int matroska_parse_flac(AVFormatContext *s,
2143			MatroskaTrack *track,
2144			int *offset)
2145			{
2146		9	AVStream *st = track->stream;
2147		9	uint8_t *p = track->codec_priv.data;
2148		9	int size = track->codec_priv.size;
2149
2150	2/4 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 9 times.	9	if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
2151		✗	av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
2152		✗	track->codec_priv.size = 0;
2153		✗	return 0;
2154			}
2155		9	*offset = 8;
2156		9	track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
2157
2158		9	p += track->codec_priv.size;
2159		9	size -= track->codec_priv.size;
2160
2161			/* parse the remaining metadata blocks if present */
2162	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 9 times.	17	while (size >= 4) {
2163			int block_last, block_type, block_size;
2164
2165		8	flac_parse_block_header(p, &block_last, &block_type, &block_size);
2166
2167		8	p += 4;
2168		8	size -= 4;
2169	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times.	8	if (block_size > size)
2170		✗	return 0;
2171
2172			/* check for the channel mask */
2173	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
2174		8	AVDictionary *dict = NULL;
2175			AVDictionaryEntry *chmask;
2176
2177		8	ff_vorbis_comment(s, &dict, p, block_size, 0);
2178		8	chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2179	1/2 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken.	8	if (chmask) {
2180		8	uint64_t mask = strtol(chmask->value, NULL, 0);
2181	2/4 ✓ Branch 0 taken 8 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 8 times.	8	if (!mask || mask & ~0x3ffffULL) {
2182		✗	av_log(s, AV_LOG_WARNING,
2183			"Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2184			} else
2185		8	av_channel_layout_from_mask(&st->codecpar->ch_layout, mask);
2186			}
2187		8	av_dict_free(&dict);
2188			}
2189
2190		8	p += block_size;
2191		8	size -= block_size;
2192			}
2193
2194		9	return 0;
2195			}
2196
2197		7	static int mkv_field_order(const MatroskaDemuxContext *matroska, uint64_t field_order)
2198			{
2199		7	int minor, micro, bttb = 0;
2200
2201			/* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2202			* this function, and fixed in 57.52 */
2203	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 7 times.	7	if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf57.%d.%d", &minor, &micro) == 2)
2204		✗	bttb = (minor >= 36 && minor <= 51 && micro >= 100);
2205
2206	2/7 ✗ Branch 0 not taken. ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times. ✓ Branch 3 taken 1 times. ✗ Branch 4 not taken. ✗ Branch 5 not taken. ✗ Branch 6 not taken.	7	switch (field_order) {
2207		✗	case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
2208		✗	return AV_FIELD_PROGRESSIVE;
2209		✗	case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
2210		✗	return AV_FIELD_UNKNOWN;
2211		6	case MATROSKA_VIDEO_FIELDORDER_TT:
2212		6	return AV_FIELD_TT;
2213		1	case MATROSKA_VIDEO_FIELDORDER_BB:
2214		1	return AV_FIELD_BB;
2215		✗	case MATROSKA_VIDEO_FIELDORDER_BT:
2216		✗	return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2217		✗	case MATROSKA_VIDEO_FIELDORDER_TB:
2218		✗	return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2219		✗	default:
2220		✗	return AV_FIELD_UNKNOWN;
2221			}
2222			}
2223
2224		12	static void mkv_stereo_mode_display_mul(int stereo_mode,
2225			int *h_width, int *h_height)
2226			{
2227	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times. ✓ Branch 2 taken 4 times. ✓ Branch 3 taken 4 times.	12	switch (stereo_mode) {
2228		✗	case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
2229			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
2230			case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
2231			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
2232			case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
2233		✗	break;
2234		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
2235			case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
2236			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
2237			case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
2238		4	*h_width = 2;
2239		4	break;
2240		4	case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
2241			case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
2242			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
2243			case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
2244		4	*h_height = 2;
2245		4	break;
2246			}
2247		12	}
2248
2249		236	static int mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
2250			{
2251			static const struct {
2252			char type;
2253			char flags;
2254			} stereo_mode_conv [] = {
2255			#define STEREO_MODE_CONV(STEREOMODETYPE, STEREO3DTYPE, FLAGS, WDIV, HDIV, WEBM) \
2256			[(STEREOMODETYPE)] = { .type = (STEREO3DTYPE), .flags = (FLAGS) },
2257			#define NOTHING(STEREOMODETYPE, WDIV, HDIV, WEBM)
2258			STEREOMODE_STEREO3D_MAPPING(STEREO_MODE_CONV, NOTHING)
2259			};
2260			AVStereo3D *stereo;
2261			size_t size;
2262
2263		236	stereo = av_stereo3d_alloc_size(&size);
2264	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (!stereo)
2265		✗	return AVERROR(ENOMEM);
2266
2267		236	stereo->type = stereo_mode_conv[stereo_mode].type;
2268		236	stereo->flags = stereo_mode_conv[stereo_mode].flags;
2269
2270	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 236 times.	236	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2271			AV_PKT_DATA_STEREO3D, stereo, size, 0)) {
2272		✗	av_freep(&stereo);
2273		✗	return AVERROR(ENOMEM);
2274			}
2275
2276		236	return 0;
2277			}
2278
2279		333	static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2280		333	const MatroskaTrackVideoColor *color = track->video.color.elem;
2281			const MatroskaMasteringMeta *mastering_meta;
2282			int has_mastering_primaries, has_mastering_luminance;
2283
2284	2/2 ✓ Branch 0 taken 275 times. ✓ Branch 1 taken 58 times.	333	if (!track->video.color.nb_elem)
2285		275	return 0;
2286
2287		58	mastering_meta = &color->mastering_meta;
2288			// Mastering primaries are CIE 1931 coords, and must be > 0.
2289		58	has_mastering_primaries =
2290	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2291	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	7	mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2292	2/4 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	7	mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2293	4/6 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 51 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 7 times. ✗ Branch 5 not taken.	65	mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2294		116	has_mastering_luminance = mastering_meta->max_luminance >
2295		65	mastering_meta->min_luminance.el.f &&
2296	3/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 51 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	65	mastering_meta->min_luminance.el.f >= 0 &&
2297	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	mastering_meta->min_luminance.count;
2298
2299	1/2 ✓ Branch 0 taken 58 times. ✗ Branch 1 not taken.	58	if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2300		58	st->codecpar->color_space = color->matrix_coefficients;
2301	1/2 ✓ Branch 0 taken 58 times. ✗ Branch 1 not taken.	58	if (color->primaries != AVCOL_PRI_RESERVED &&
2302	2/2 ✓ Branch 0 taken 56 times. ✓ Branch 1 taken 2 times.	58	color->primaries != AVCOL_PRI_RESERVED0)
2303		56	st->codecpar->color_primaries = color->primaries;
2304	1/2 ✓ Branch 0 taken 58 times. ✗ Branch 1 not taken.	58	if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2305	2/2 ✓ Branch 0 taken 56 times. ✓ Branch 1 taken 2 times.	58	color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2306		56	st->codecpar->color_trc = color->transfer_characteristics;
2307	2/2 ✓ Branch 0 taken 38 times. ✓ Branch 1 taken 20 times.	58	if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2308	1/2 ✓ Branch 0 taken 38 times. ✗ Branch 1 not taken.	38	color->range <= AVCOL_RANGE_JPEG)
2309		38	st->codecpar->color_range = color->range;
2310	2/2 ✓ Branch 0 taken 37 times. ✓ Branch 1 taken 21 times.	58	if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2311	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2312	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2313	1/2 ✓ Branch 0 taken 37 times. ✗ Branch 1 not taken.	37	color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2314		37	st->codecpar->chroma_location =
2315		37	av_chroma_location_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2316		37	(color->chroma_siting_vert - 1) << 7);
2317			}
2318	3/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 51 times. ✓ Branch 2 taken 7 times. ✗ Branch 3 not taken.	58	if (color->max_cll && color->max_fall) {
2319		7	size_t size = 0;
2320		7	AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
2321	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2322		✗	return AVERROR(ENOMEM);
2323	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times.	7	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2324			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, metadata, size, 0)) {
2325		✗	av_freep(&metadata);
2326		✗	return AVERROR(ENOMEM);
2327			}
2328		7	metadata->MaxCLL = color->max_cll;
2329		7	metadata->MaxFALL = color->max_fall;
2330			}
2331
2332	3/4 ✓ Branch 0 taken 51 times. ✓ Branch 1 taken 7 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 51 times.	58	if (has_mastering_primaries || has_mastering_luminance) {
2333		7	size_t size = 0;
2334		7	AVMasteringDisplayMetadata *metadata = av_mastering_display_metadata_alloc_size(&size);
2335	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7 times.	7	if (!metadata)
2336		✗	return AVERROR(ENOMEM);
2337	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 7 times.	7	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2338			AV_PKT_DATA_MASTERING_DISPLAY_METADATA, metadata, size, 0)) {
2339		✗	av_freep(&metadata);
2340		✗	return AVERROR(ENOMEM);
2341			}
2342	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_primaries) {
2343		7	metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
2344		7	metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
2345		7	metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
2346		7	metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
2347		7	metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
2348		7	metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
2349		7	metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
2350		7	metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
2351		7	metadata->has_primaries = 1;
2352			}
2353	1/2 ✓ Branch 0 taken 7 times. ✗ Branch 1 not taken.	7	if (has_mastering_luminance) {
2354		7	metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
2355		7	metadata->min_luminance = av_d2q(mastering_meta->min_luminance.el.f, INT_MAX);
2356		7	metadata->has_luminance = 1;
2357			}
2358			}
2359		58	return 0;
2360			}
2361
2362		327	static int mkv_create_display_matrix(AVStream *st,
2363			const MatroskaTrackVideoProjection *proj,
2364			void *logctx)
2365			{
2366			AVPacketSideData *sd;
2367		327	double pitch = proj->pitch, yaw = proj->yaw, roll = proj->roll;
2368			int32_t *matrix;
2369			int hflip;
2370
2371	5/6 ✓ Branch 0 taken 327 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 324 times. ✓ Branch 3 taken 3 times. ✓ Branch 4 taken 322 times. ✓ Branch 5 taken 2 times.	327	if (pitch == 0.0 && yaw == 0.0 && roll == 0.0)
2372		322	return 0;
2373
2374			/* Note: The following constants are exactly representable
2375			* as floating-point numbers. */
2376	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) ||
2377			isnan(roll)) {
2378		✗	av_log(logctx, AV_LOG_WARNING, "Ignoring non-2D rectangular "
2379			"projection in stream %u (yaw %f, pitch %f, roll %f)\n",
2380			st->index, yaw, pitch, roll);
2381		✗	return 0;
2382			}
2383		5	sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2384		5	&st->codecpar->nb_coded_side_data,
2385			AV_PKT_DATA_DISPLAYMATRIX,
2386			9 * sizeof(*matrix), 0);
2387	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times.	5	if (!sd)
2388		✗	return AVERROR(ENOMEM);
2389		5	matrix = (int32_t*)sd->data;
2390
2391		5	hflip = yaw != 0.0;
2392			/* ProjectionPoseRoll is in the counter-clockwise direction
2393			* whereas av_display_rotation_set() expects its argument
2394			* to be oriented clockwise, so we need to negate roll.
2395			* Furthermore, if hflip is set, we need to negate it again
2396			* to account for the fact that the Matroska specifications
2397			* require the yaw rotation to be applied first. */
2398		5	av_display_rotation_set(matrix, roll * (2 * hflip - 1));
2399		5	av_display_matrix_flip(matrix, hflip, 0);
2400
2401		5	return 0;
2402			}
2403
2404		333	static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track,
2405			void *logctx)
2406			{
2407			AVSphericalMapping *spherical;
2408		333	const MatroskaTrackVideoProjection *mkv_projection = &track->video.projection;
2409		333	const uint8_t *priv_data = mkv_projection->private.data;
2410			enum AVSphericalProjection projection;
2411			size_t spherical_size;
2412		333	uint32_t l = 0, t = 0, r = 0, b = 0;
2413		333	uint32_t padding = 0;
2414
2415	3/4 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 327 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 6 times.	333	if (mkv_projection->private.size && priv_data[0] != 0) {
2416		✗	av_log(logctx, AV_LOG_WARNING, "Unknown spherical metadata\n");
2417		✗	return 0;
2418			}
2419
2420	2/4 ✓ Branch 0 taken 327 times. ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	333	switch (track->video.projection.type) {
2421		327	case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2422		327	return mkv_create_display_matrix(st, mkv_projection, logctx);
2423		6	case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2424	1/2 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken.	6	if (track->video.projection.private.size == 20) {
2425		6	t = AV_RB32(priv_data + 4);
2426		6	b = AV_RB32(priv_data + 8);
2427		6	l = AV_RB32(priv_data + 12);
2428		6	r = AV_RB32(priv_data + 16);
2429
2430	2/4 ✓ Branch 0 taken 6 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 6 times.	6	if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2431		✗	av_log(logctx, AV_LOG_ERROR,
2432			"Invalid bounding rectangle coordinates "
2433			"%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2434			l, t, r, b);
2435		✗	return AVERROR_INVALIDDATA;
2436			}
2437		✗	} else if (track->video.projection.private.size != 0) {
2438		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2439		✗	return AVERROR_INVALIDDATA;
2440			}
2441
2442	1/8 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✗ Branch 5 not taken. ✗ Branch 6 not taken. ✗ Branch 7 not taken.	6	if (l || t || r || b)
2443		6	projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2444			else
2445		✗	projection = AV_SPHERICAL_EQUIRECTANGULAR;
2446		6	break;
2447		✗	case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2448		✗	if (track->video.projection.private.size < 4) {
2449		✗	av_log(logctx, AV_LOG_ERROR, "Missing projection private properties\n");
2450		✗	return AVERROR_INVALIDDATA;
2451		✗	} else if (track->video.projection.private.size == 12) {
2452		✗	uint32_t layout = AV_RB32(priv_data + 4);
2453		✗	if (layout) {
2454		✗	av_log(logctx, AV_LOG_WARNING,
2455			"Unknown spherical cubemap layout %"PRIu32"\n", layout);
2456		✗	return 0;
2457			}
2458		✗	projection = AV_SPHERICAL_CUBEMAP;
2459		✗	padding = AV_RB32(priv_data + 8);
2460			} else {
2461		✗	av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2462		✗	return AVERROR_INVALIDDATA;
2463			}
2464		✗	break;
2465		✗	default:
2466		✗	av_log(logctx, AV_LOG_WARNING,
2467			"Unknown spherical metadata type %"PRIu64"\n",
2468		✗	track->video.projection.type);
2469		✗	return 0;
2470			}
2471
2472		6	spherical = av_spherical_alloc(&spherical_size);
2473	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!spherical)
2474		✗	return AVERROR(ENOMEM);
2475
2476		6	spherical->projection = projection;
2477
2478		6	spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2479		6	spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2480		6	spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2481
2482		6	spherical->padding = padding;
2483
2484		6	spherical->bound_left = l;
2485		6	spherical->bound_top = t;
2486		6	spherical->bound_right = r;
2487		6	spherical->bound_bottom = b;
2488
2489	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times.	6	if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
2490			AV_PKT_DATA_SPHERICAL, spherical, spherical_size, 0)) {
2491		✗	av_freep(&spherical);
2492		✗	return AVERROR(ENOMEM);
2493			}
2494
2495		6	return 0;
2496			}
2497
2498		4	static int mkv_parse_dvcc_dvvc(AVFormatContext *s, AVStream *st, const MatroskaTrack *track,
2499			EbmlBin *bin)
2500			{
2501		4	return ff_isom_parse_dvcc_dvvc(s, st, bin->data, bin->size);
2502			}
2503
2504		441	static int mkv_parse_block_addition_mappings(AVFormatContext *s, AVStream *st, MatroskaTrack *track)
2505			{
2506		441	const EbmlList *mappings_list = &track->block_addition_mappings;
2507		441	MatroskaBlockAdditionMapping *mappings = mappings_list->elem;
2508			int ret;
2509
2510	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 441 times.	447	for (int i = 0; i < mappings_list->nb_elem; i++) {
2511		6	MatroskaBlockAdditionMapping *mapping = &mappings[i];
2512		6	uint64_t type = mapping->type;
2513
2514	2/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. ✗ Branch 3 not taken.	6	switch (mapping->type) {
2515		✗	case MATROSKA_BLOCK_ADD_ID_TYPE_DEFAULT:
2516		✗	av_log(s, AV_LOG_DEBUG,
2517			"Explicit block Addition Mapping type \"Use BlockAddIDValue\", value %"PRIu64","
2518		✗	" name \"%s\" found.\n", mapping->value, mapping->name ? mapping->name : "");
2519		✗	type = MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE;
2520			// fall-through
2521		2	case MATROSKA_BLOCK_ADD_ID_TYPE_OPAQUE:
2522			case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35:
2523	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (mapping->value != type) {
2524		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2525		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2526			"Invalid Block Addition Value 0x%"PRIx64" for Block Addition Mapping Type "
2527			"0x%"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2528		✗	mapping->name ? mapping->name : "");
2529		✗	if (strict)
2530		✗	return AVERROR_INVALIDDATA;
2531			}
2532		2	break;
2533		4	case MATROSKA_BLOCK_ADD_ID_TYPE_DVCC:
2534			case MATROSKA_BLOCK_ADD_ID_TYPE_DVVC:
2535	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if ((ret = mkv_parse_dvcc_dvvc(s, st, track, &mapping->extradata)) < 0)
2536		✗	return ret;
2537
2538		4	break;
2539		✗	default:
2540		✗	av_log(s, AV_LOG_DEBUG,
2541			"Unknown Block Addition Mapping type 0x%"PRIx64", value %"PRIu64", name \"%s\"\n",
2542		✗	mapping->type, mapping->value, mapping->name ? mapping->name : "");
2543		✗	if (mapping->value < 2) {
2544		✗	int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
2545		✗	av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
2546			"Invalid Block Addition value 0x%"PRIu64" for unknown Block Addition Mapping "
2547			"type %"PRIx64", name \"%s\"\n", mapping->value, mapping->type,
2548		✗	mapping->name ? mapping->name : "");
2549		✗	if (strict)
2550		✗	return AVERROR_INVALIDDATA;
2551			}
2552		✗	break;
2553			}
2554			}
2555
2556		441	return 0;
2557			}
2558
2559		1	static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2560			{
2561			const AVCodecTag *codec_tags;
2562
2563		2	codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2564	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2565
2566			/* Normalize noncompliant private data that starts with the fourcc
2567			* by expanding/shifting the data by 4 bytes and storing the data
2568			* size at the start. */
2569	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2570		✗	int ret = av_buffer_realloc(&track->codec_priv.buf,
2571		✗	track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2572		✗	if (ret < 0)
2573		✗	return ret;
2574
2575		✗	track->codec_priv.data = track->codec_priv.buf->data;
2576		✗	memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2577		✗	track->codec_priv.size += 4;
2578		✗	AV_WB32(track->codec_priv.data, track->codec_priv.size);
2579			}
2580
2581		1	*fourcc = AV_RL32(track->codec_priv.data + 4);
2582		1	*codec_id = ff_codec_get_id(codec_tags, *fourcc);
2583
2584		1	return 0;
2585			}
2586
2587			/* An enum with potential return values of the functions for parsing a track.
2588			* Apart from that all these functions can also indicate ordinary errors via
2589			* negative return values. */
2590			enum {
2591			SKIP_TRACK = 1,
2592			};
2593
2594			#define AAC_MAX_EXTRADATA_SIZE 5
2595			#define TTA_EXTRADATA_SIZE 22
2596			#define WAVPACK_EXTRADATA_SIZE 2
2597			/* Performs the codec-specific part of parsing an audio track. */
2598		84	static int mka_parse_audio_codec(MatroskaTrack *track, AVCodecParameters *par,
2599			const MatroskaDemuxContext *matroska,
2600			AVFormatContext *s, int *extradata_offset)
2601			{
2602			uint8_t extradata[FFMAX3(AAC_MAX_EXTRADATA_SIZE,
2603			TTA_EXTRADATA_SIZE,
2604			WAVPACK_EXTRADATA_SIZE)];
2605		84	int extradata_size = 0; // > 0 means that the extradata buffer is used
2606			int ret;
2607
2608	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 83 times.	84	if (!strcmp(track->codec_id, "A_MS/ACM") &&
2609	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 14) {
2610			FFIOContext b;
2611		1	ffio_init_read_context(&b, track->codec_priv.data,
2612			track->codec_priv.size);
2613		1	ret = ff_get_wav_header(s, &b.pub, par,
2614			track->codec_priv.size, 0);
2615	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2616		✗	return ret;
2617		1	*extradata_offset = FFMIN(track->codec_priv.size, 18);
2618		1	return 0;
2619	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	} else if (!strcmp(track->codec_id, "A_QUICKTIME") &&
2620			/* Normally 36, but allow noncompliant private data */
2621		✗	track->codec_priv.size >= 32) {
2622			enum AVCodecID codec_id;
2623			uint32_t fourcc;
2624			uint16_t sample_size;
2625
2626		✗	ret = get_qt_codec(track, &fourcc, &codec_id);
2627		✗	if (ret < 0)
2628		✗	return ret;
2629		✗	sample_size = AV_RB16(track->codec_priv.data + 26);
2630		✗	if (fourcc == 0) {
2631		✗	if (sample_size == 8) {
2632		✗	fourcc = MKTAG('r','a','w',' ');
2633		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2634		✗	} else if (sample_size == 16) {
2635		✗	fourcc = MKTAG('t','w','o','s');
2636		✗	codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2637			}
2638			}
2639		✗	if ((fourcc == MKTAG('t','w','o','s') ||
2640		✗	fourcc == MKTAG('s','o','w','t')) && sample_size == 8)
2641		✗	codec_id = AV_CODEC_ID_PCM_S8;
2642		✗	par->codec_id = codec_id;
2643		✗	par->codec_tag = fourcc;
2644		✗	return 0;
2645			}
2646
2647	9/12 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 7 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 12 times. ✓ Branch 4 taken 2 times. ✓ Branch 5 taken 3 times. ✗ Branch 6 not taken. ✗ Branch 7 not taken. ✓ Branch 8 taken 1 times. ✓ Branch 9 taken 9 times. ✓ Branch 10 taken 2 times. ✓ Branch 11 taken 42 times.	83	switch (par->codec_id) {
2648		5	case AV_CODEC_ID_PCM_S16BE:
2649	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 2 times.	5	switch (track->audio.bitdepth) {
2650		✗	case 8:
2651		✗	par->codec_id = AV_CODEC_ID_PCM_U8;
2652		✗	break;
2653		1	case 24:
2654		1	par->codec_id = AV_CODEC_ID_PCM_S24BE;
2655		1	break;
2656		2	case 32:
2657		2	par->codec_id = AV_CODEC_ID_PCM_S32BE;
2658		2	break;
2659			}
2660		5	break;
2661		7	case AV_CODEC_ID_PCM_S16LE:
2662	4/4 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 3 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 1 times.	7	switch (track->audio.bitdepth) {
2663		1	case 8:
2664		1	par->codec_id = AV_CODEC_ID_PCM_U8;
2665		1	break;
2666		3	case 24:
2667		3	par->codec_id = AV_CODEC_ID_PCM_S24LE;
2668		3	break;
2669		2	case 32:
2670		2	par->codec_id = AV_CODEC_ID_PCM_S32LE;
2671		2	break;
2672			}
2673		7	break;
2674		✗	case AV_CODEC_ID_PCM_F32LE:
2675		✗	if (track->audio.bitdepth == 64)
2676		✗	par->codec_id = AV_CODEC_ID_PCM_F64LE;
2677		✗	break;
2678		12	case AV_CODEC_ID_AAC:
2679	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!track->codec_priv.size) {
2680		✗	int profile = matroska_aac_profile(track->codec_id);
2681		✗	int sri = matroska_aac_sri(track->audio.samplerate);
2682
2683		✗	extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2684		✗	extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2685		✗	if (strstr(track->codec_id, "SBR")) {
2686		✗	sri = matroska_aac_sri(track->audio.out_samplerate);
2687		✗	extradata[2] = 0x56;
2688		✗	extradata[3] = 0xE5;
2689		✗	extradata[4] = 0x80 | (sri << 3);
2690		✗	extradata_size = 5;
2691			} else
2692		✗	extradata_size = 2;
2693			}
2694		12	break;
2695		2	case AV_CODEC_ID_ALAC:
2696	2/4 ✓ Branch 0 taken 2 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken.	2	if (track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2697			/* Only ALAC's magic cookie is stored in Matroska's track headers.
2698			* Create the "atom size", "tag", and "tag version" fields the
2699			* decoder expects manually. */
2700		2	ret = ff_alloc_extradata(par, 12 + track->codec_priv.size);
2701	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (ret < 0)
2702		✗	return ret;
2703		2	AV_WB32(par->extradata, par->extradata_size);
2704		2	AV_WB32(&par->extradata[4], MKBETAG('a', 'l', 'a', 'c'));
2705		2	AV_WB32(&par->extradata[8], 0);
2706		2	memcpy(&par->extradata[12], track->codec_priv.data,
2707		2	track->codec_priv.size);
2708			}
2709		2	break;
2710		3	case AV_CODEC_ID_TTA:
2711			{
2712			uint8_t *ptr;
2713	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	if (track->audio.channels > UINT16_MAX ||
2714	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	track->audio.bitdepth > UINT16_MAX) {
2715		✗	av_log(matroska->ctx, AV_LOG_WARNING,
2716			"Too large audio channel number %"PRIu64
2717			" or bitdepth %"PRIu64". Skipping track.\n",
2718			track->audio.channels, track->audio.bitdepth);
2719		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2720		✗	return AVERROR_INVALIDDATA;
2721			else
2722		✗	return SKIP_TRACK;
2723			}
2724	2/4 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 3 times.	3	if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2725		✗	return AVERROR_INVALIDDATA;
2726		3	extradata_size = TTA_EXTRADATA_SIZE;
2727		3	ptr = extradata;
2728		3	bytestream_put_be32(&ptr, AV_RB32("TTA1"));
2729		3	bytestream_put_le16(&ptr, 1);
2730		3	bytestream_put_le16(&ptr, track->audio.channels);
2731		3	bytestream_put_le16(&ptr, track->audio.bitdepth);
2732		3	bytestream_put_le32(&ptr, track->audio.out_samplerate);
2733		3	bytestream_put_le32(&ptr, av_rescale(matroska->duration * matroska->time_scale,
2734		3	track->audio.out_samplerate,
2735			AV_TIME_BASE * 1000));
2736		3	break;
2737			}
2738		✗	case AV_CODEC_ID_RA_144:
2739		✗	track->audio.out_samplerate = 8000;
2740		✗	track->audio.channels = 1;
2741		✗	break;
2742		✗	case AV_CODEC_ID_RA_288:
2743			case AV_CODEC_ID_COOK:
2744			case AV_CODEC_ID_ATRAC3:
2745			case AV_CODEC_ID_SIPR:
2746			{
2747		✗	const uint8_t *ptr = track->codec_priv.data;
2748			int flavor;
2749
2750		✗	if (!track->codec_priv.size)
2751		✗	break;
2752
2753		✗	if (track->codec_priv.size < 46)
2754		✗	return AVERROR_INVALIDDATA;
2755		✗	ptr += 22;
2756		✗	flavor = bytestream_get_be16(&ptr);
2757		✗	track->audio.coded_framesize = bytestream_get_be32(&ptr);
2758		✗	ptr += 12;
2759		✗	track->audio.sub_packet_h = bytestream_get_be16(&ptr);
2760		✗	track->audio.frame_size = bytestream_get_be16(&ptr);
2761		✗	track->audio.sub_packet_size = bytestream_get_be16(&ptr);
2762		✗	if (track->audio.coded_framesize <= 0 ||
2763		✗	track->audio.sub_packet_h <= 0 ||
2764		✗	track->audio.frame_size <= 0)
2765		✗	return AVERROR_INVALIDDATA;
2766
2767		✗	if (par->codec_id == AV_CODEC_ID_RA_288) {
2768		✗	if (track->audio.sub_packet_h & 1 || 2 * track->audio.frame_size
2769		✗	!= (int64_t)track->audio.sub_packet_h * track->audio.coded_framesize)
2770		✗	return AVERROR_INVALIDDATA;
2771		✗	par->block_align = track->audio.coded_framesize;
2772		✗	track->codec_priv.size = 0;
2773			} else {
2774		✗	if (par->codec_id == AV_CODEC_ID_SIPR) {
2775			static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2776		✗	if (flavor > 3)
2777		✗	return AVERROR_INVALIDDATA;
2778		✗	track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2779		✗	par->bit_rate = sipr_bit_rate[flavor];
2780		✗	} else if (track->audio.sub_packet_size <= 0 ||
2781		✗	track->audio.frame_size % track->audio.sub_packet_size)
2782		✗	return AVERROR_INVALIDDATA;
2783		✗	par->block_align = track->audio.sub_packet_size;
2784		✗	*extradata_offset = 78;
2785			}
2786		✗	track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2787		✗	track->audio.frame_size);
2788		✗	if (!track->audio.buf)
2789		✗	return AVERROR(ENOMEM);
2790		✗	break;
2791			}
2792		1	case AV_CODEC_ID_ATRAC1:
2793			/* ATRAC1 uses a constant frame size.
2794			* Typical ATRAC1 streams are either mono or stereo.
2795			* At most, ATRAC1 was used to store 8 channels of audio. */
2796	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (track->audio.channels > 8)
2797		✗	return AVERROR_INVALIDDATA;
2798		1	par->block_align = track->audio.channels * 212;
2799		1	break;
2800		9	case AV_CODEC_ID_FLAC:
2801	1/2 ✓ Branch 0 taken 9 times. ✗ Branch 1 not taken.	9	if (track->codec_priv.size) {
2802		9	ret = matroska_parse_flac(s, track, extradata_offset);
2803	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 9 times.	9	if (ret < 0)
2804		✗	return ret;
2805			}
2806		9	break;
2807		2	case AV_CODEC_ID_WAVPACK:
2808	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 1 times.	2	if (track->codec_priv.size < 2) {
2809		1	av_log(matroska->ctx, AV_LOG_INFO, "Assuming WavPack version 4.10 "
2810			"in absence of valid CodecPrivate.\n");
2811		1	extradata_size = WAVPACK_EXTRADATA_SIZE;
2812		1	AV_WL16(extradata, 0x410);
2813			}
2814		2	break;
2815			}
2816
2817	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 79 times.	83	if (extradata_size > 0) {
2818		4	ret = ff_alloc_extradata(par, extradata_size);
2819	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (ret < 0)
2820		✗	return ret;
2821		4	memcpy(par->extradata, extradata, extradata_size);
2822			}
2823
2824		83	return 0;
2825			}
2826
2827			/* Performs the generic part of parsing an audio track. */
2828		84	static int mka_parse_audio(MatroskaTrack *track, AVStream *st,
2829			AVCodecParameters *par,
2830			const MatroskaDemuxContext *matroska,
2831			AVFormatContext *s, int *extradata_offset)
2832			{
2833		84	FFStream *const sti = ffstream(st);
2834			int ret;
2835
2836		84	ret = mka_parse_audio_codec(track, par, matroska,
2837			s, extradata_offset);
2838	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret)
2839		✗	return ret;
2840
2841		84	par->codec_type = AVMEDIA_TYPE_AUDIO;
2842		84	par->sample_rate = track->audio.out_samplerate;
2843			// channel layout may be already set by codec private checks above
2844	2/2 ✓ Branch 1 taken 75 times. ✓ Branch 2 taken 9 times.	84	if (!av_channel_layout_check(&par->ch_layout)) {
2845		75	par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
2846		75	par->ch_layout.nb_channels = track->audio.channels;
2847			}
2848	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!par->bits_per_coded_sample)
2849		83	par->bits_per_coded_sample = track->audio.bitdepth;
2850	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (par->codec_id == AV_CODEC_ID_MP3 ||
2851	1/2 ✓ Branch 0 taken 83 times. ✗ Branch 1 not taken.	83	par->codec_id == AV_CODEC_ID_MLP ||
2852	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 83 times.	83	par->codec_id == AV_CODEC_ID_TRUEHD)
2853		1	sti->need_parsing = AVSTREAM_PARSE_FULL;
2854	2/2 ✓ Branch 0 taken 71 times. ✓ Branch 1 taken 12 times.	83	else if (par->codec_id != AV_CODEC_ID_AAC)
2855		71	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
2856	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 73 times.	84	if (track->codec_delay > 0) {
2857		11	par->initial_padding = av_rescale_q(track->codec_delay,
2858		11	(AVRational){1, 1000000000},
2859		11	(AVRational){1, par->codec_id == AV_CODEC_ID_OPUS ?
2860	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 6 times.	11	48000 : par->sample_rate});
2861			}
2862	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 77 times.	84	if (track->seek_preroll > 0) {
2863		7	par->seek_preroll = av_rescale_q(track->seek_preroll,
2864		7	(AVRational){1, 1000000000},
2865		7	(AVRational){1, par->sample_rate});
2866			}
2867
2868		84	return 0;
2869			}
2870
2871			/* Performs the codec-specific part of parsing a video track. */
2872		333	static int mkv_parse_video_codec(MatroskaTrack *track, AVCodecParameters *par,
2873			const MatroskaDemuxContext *matroska,
2874			int *extradata_offset)
2875			{
2876	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 328 times.	333	if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2877	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	track->codec_priv.size >= 40) {
2878		5	track->ms_compat = 1;
2879		5	par->bits_per_coded_sample = AV_RL16(track->codec_priv.data + 14);
2880		5	par->codec_tag = AV_RL32(track->codec_priv.data + 16);
2881		5	par->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2882			par->codec_tag);
2883	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times.	5	if (!par->codec_id)
2884		✗	par->codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2885			par->codec_tag);
2886		5	*extradata_offset = 40;
2887		5	return 0;
2888	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 327 times.	328	} else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2889	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	track->codec_priv.size >= 21) {
2890			enum AVCodecID codec_id;
2891			uint32_t fourcc;
2892		1	int ret = get_qt_codec(track, &fourcc, &codec_id);
2893	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (ret < 0)
2894		✗	return ret;
2895	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 ")) {
2896		✗	fourcc = MKTAG('S','V','Q','3');
2897		✗	codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2898			}
2899		1	par->codec_id = codec_id;
2900	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (codec_id == AV_CODEC_ID_NONE)
2901		✗	av_log(matroska->ctx, AV_LOG_ERROR,
2902		✗	"mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2903	1/2 ✓ Branch 0 taken 1 times. ✗ Branch 1 not taken.	1	if (track->codec_priv.size >= 86) {
2904			FFIOContext b;
2905		1	unsigned bit_depth = AV_RB16(track->codec_priv.data + 82);
2906		1	ffio_init_read_context(&b, track->codec_priv.data,
2907			track->codec_priv.size);
2908	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (ff_get_qtpalette(codec_id, &b.pub, track->palette)) {
2909		✗	bit_depth &= 0x1F;
2910		✗	track->has_palette = 1;
2911			}
2912		1	par->bits_per_coded_sample = bit_depth;
2913			}
2914		1	par->codec_tag = fourcc;
2915		1	return 0;
2916			}
2917
2918	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 5 times. ✓ Branch 2 taken 249 times. ✓ Branch 3 taken 73 times.	327	switch (par->codec_id) {
2919		✗	case AV_CODEC_ID_RV10:
2920			case AV_CODEC_ID_RV20:
2921			case AV_CODEC_ID_RV30:
2922			case AV_CODEC_ID_RV40:
2923		✗	*extradata_offset = 26;
2924		✗	break;
2925		5	case AV_CODEC_ID_PRORES:
2926	1/2 ✓ Branch 0 taken 5 times. ✗ Branch 1 not taken.	5	if (track->codec_priv.size == 4)
2927		5	par->codec_tag = AV_RL32(track->codec_priv.data);
2928		5	break;
2929		249	case AV_CODEC_ID_VP9:
2930			/* we don't need any value stored in CodecPrivate.
2931			* make sure that it's not exported as extradata. */
2932		249	track->codec_priv.size = 0;
2933		249	break;
2934			}
2935
2936		327	return 0;
2937			}
2938
2939			/* Performs the generic part of parsing a video track. */
2940		333	static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
2941			AVCodecParameters *par,
2942			const MatroskaDemuxContext *matroska,
2943			int *extradata_offset)
2944			{
2945		333	FFStream *const sti = ffstream(st);
2946			MatroskaTrackPlane *planes;
2947		333	int display_width_mul = 1;
2948		333	int display_height_mul = 1;
2949			int ret;
2950
2951	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 329 times.	333	if (track->video.color_space.size == 4)
2952		4	par->codec_tag = AV_RL32(track->video.color_space.data);
2953
2954		333	ret = mkv_parse_video_codec(track, par, matroska,
2955			extradata_offset);
2956	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	if (ret < 0)
2957		✗	return ret;
2958
2959		333	par->codec_type = AVMEDIA_TYPE_VIDEO;
2960		333	par->width = track->video.pixel_width;
2961		333	par->height = track->video.pixel_height;
2962
2963	2/2 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 326 times.	333	if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2964		7	par->field_order = mkv_field_order(matroska, track->video.field_order);
2965	2/2 ✓ Branch 0 taken 19 times. ✓ Branch 1 taken 307 times.	326	else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2966		19	par->field_order = AV_FIELD_PROGRESSIVE;
2967
2968	4/4 ✓ Branch 0 taken 105 times. ✓ Branch 1 taken 228 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 93 times.	333	if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2969		12	mkv_stereo_mode_display_mul(track->video.stereo_mode,
2970			&display_width_mul, &display_height_mul);
2971
2972	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 22 times.	333	if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2973	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 &&
2974	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 &&
2975	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 &&
2976	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)
2977		311	av_reduce(&st->sample_aspect_ratio.num,
2978			&st->sample_aspect_ratio.den,
2979		311	track->video.cropped_height * track->video.display_width * display_width_mul,
2980		311	track->video.cropped_width * track->video.display_height * display_height_mul,
2981			INT_MAX);
2982			}
2983	1/2 ✓ Branch 0 taken 333 times. ✗ Branch 1 not taken.	333	if (track->video.cropped_width != track->video.pixel_width ||
2984	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	track->video.cropped_height != track->video.pixel_height) {
2985			uint8_t *cropping;
2986		✗	AVPacketSideData *sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
2987		✗	&st->codecpar->nb_coded_side_data,
2988			AV_PKT_DATA_FRAME_CROPPING,
2989			sizeof(uint32_t) * 4, 0);
2990		✗	if (!sd)
2991		✗	return AVERROR(ENOMEM);
2992
2993		✗	cropping = sd->data;
2994		✗	bytestream_put_le32(&cropping, track->video.pixel_cropt);
2995		✗	bytestream_put_le32(&cropping, track->video.pixel_cropb);
2996		✗	bytestream_put_le32(&cropping, track->video.pixel_cropl);
2997		✗	bytestream_put_le32(&cropping, track->video.pixel_cropr);
2998			}
2999	2/2 ✓ Branch 0 taken 324 times. ✓ Branch 1 taken 9 times.	333	if (par->codec_id != AV_CODEC_ID_HEVC)
3000		324	sti->need_parsing = AVSTREAM_PARSE_HEADERS;
3001
3002	2/2 ✓ Branch 0 taken 291 times. ✓ Branch 1 taken 42 times.	333	if (track->default_duration) {
3003	1/2 ✓ Branch 0 taken 291 times. ✗ Branch 1 not taken.	291	int div = track->default_duration <= INT64_MAX ? 1 : 2;
3004		291	av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3005		291	1000000000 / div, track->default_duration / div, 30000);
3006			#if FF_API_R_FRAME_RATE
3007	2/2 ✓ Branch 0 taken 289 times. ✓ Branch 1 taken 2 times.	291	if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
3008	2/2 ✓ Branch 0 taken 274 times. ✓ Branch 1 taken 15 times.	289	&& st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
3009		274	st->r_frame_rate = st->avg_frame_rate;
3010			#endif
3011			}
3012
3013			/* export stereo mode flag as metadata tag */
3014	4/4 ✓ Branch 0 taken 105 times. ✓ Branch 1 taken 228 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 93 times.	333	if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
3015		12	av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
3016
3017			/* export alpha mode flag as metadata tag */
3018	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 330 times.	333	if (track->video.alpha_mode)
3019		3	av_dict_set_int(&st->metadata, "alpha_mode", 1, 0);
3020
3021			/* if we have virtual track, mark the real tracks */
3022		333	planes = track->operation.combine_planes.elem;
3023	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	for (int j = 0; j < track->operation.combine_planes.nb_elem; j++) {
3024		✗	MatroskaTrack *tracks = matroska->tracks.elem;
3025			char buf[32];
3026		✗	if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
3027		✗	continue;
3028		✗	snprintf(buf, sizeof(buf), "%s_%d",
3029		✗	matroska_video_stereo_plane[planes[j].type], st->index);
3030		✗	for (int k = 0; k < matroska->tracks.nb_elem; k++)
3031		✗	if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
3032		✗	av_dict_set(&tracks[k].stream->metadata,
3033			"stereo_mode", buf, 0);
3034		✗	break;
3035			}
3036			}
3037			// add stream level stereo3d side data if it is a supported format
3038	2/2 ✓ Branch 0 taken 240 times. ✓ Branch 1 taken 93 times.	333	if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
3039	2/2 ✓ Branch 0 taken 238 times. ✓ Branch 1 taken 2 times.	240	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_CYAN_RED &&
3040	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 2 times.	238	track->video.stereo_mode != MATROSKA_VIDEO_STEREOMODE_TYPE_ANAGLYPH_GREEN_MAG) {
3041		236	int ret = mkv_stereo3d_conv(st, track->video.stereo_mode);
3042	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (ret < 0)
3043		✗	return ret;
3044			}
3045
3046		333	ret = mkv_parse_video_color(st, track);
3047	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	if (ret < 0)
3048		✗	return ret;
3049		333	ret = mkv_parse_video_projection(st, track, matroska->ctx);
3050	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	if (ret < 0)
3051		✗	return ret;
3052
3053		333	return 0;
3054			}
3055
3056			/* Performs the codec-specific part of parsing a subtitle track. */
3057		24	static int mkv_parse_subtitle_codec(MatroskaTrack *track, AVStream *st,
3058			AVCodecParameters *par,
3059			const MatroskaDemuxContext *matroska)
3060			{
3061	2/3 ✗ Branch 0 not taken. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 16 times.	24	switch (par->codec_id) {
3062		✗	case AV_CODEC_ID_ARIB_CAPTION:
3063		✗	if (track->codec_priv.size == 3) {
3064		✗	int component_tag = track->codec_priv.data[0];
3065		✗	int data_component_id = AV_RB16(track->codec_priv.data + 1);
3066
3067		✗	switch (data_component_id) {
3068		✗	case 0x0008:
3069			// [0x30..0x37] are component tags utilized for
3070			// non-mobile captioning service ("profile A").
3071		✗	if (component_tag >= 0x30 && component_tag <= 0x37) {
3072		✗	par->profile = AV_PROFILE_ARIB_PROFILE_A;
3073			}
3074		✗	break;
3075		✗	case 0x0012:
3076			// component tag 0x87 signifies a mobile/partial reception
3077			// (1seg) captioning service ("profile C").
3078		✗	if (component_tag == 0x87) {
3079		✗	par->profile = AV_PROFILE_ARIB_PROFILE_C;
3080			}
3081		✗	break;
3082		✗	default:
3083		✗	break;
3084			}
3085
3086		✗	if (par->profile == AV_PROFILE_UNKNOWN)
3087		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3088			"Unknown ARIB caption profile utilized: %02x / %04x\n",
3089			component_tag, data_component_id);
3090
3091		✗	track->codec_priv.size = 0;
3092			}
3093		✗	break;
3094		8	case AV_CODEC_ID_WEBVTT:
3095	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 6 times.	8	if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
3096		2	st->disposition |= AV_DISPOSITION_CAPTIONS;
3097	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 4 times.	6	} else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
3098		2	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3099	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	} else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
3100		2	st->disposition |= AV_DISPOSITION_METADATA;
3101			}
3102		8	break;
3103			}
3104
3105		24	return 0;
3106			}
3107
3108		370	static int matroska_parse_tracks(AVFormatContext *s)
3109			{
3110		370	MatroskaDemuxContext *matroska = s->priv_data;
3111		370	MatroskaTrack *tracks = matroska->tracks.elem;
3112			int i, j, ret;
3113
3114	2/2 ✓ Branch 0 taken 441 times. ✓ Branch 1 taken 370 times.	811	for (i = 0; i < matroska->tracks.nb_elem; i++) {
3115		441	MatroskaTrack *track = &tracks[i];
3116		441	enum AVCodecID codec_id = AV_CODEC_ID_NONE;
3117			AVCodecParameters *par;
3118			MatroskaTrackType type;
3119		441	int extradata_offset = 0;
3120			AVStream *st;
3121		441	char* key_id_base64 = NULL;
3122
3123			/* Apply some sanity checks. */
3124	2/2 ✓ Branch 0 taken 108 times. ✓ Branch 1 taken 333 times.	441	if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
3125	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 84 times.	108	track->type != MATROSKA_TRACK_TYPE_AUDIO &&
3126	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 20 times.	24	track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
3127	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	track->type != MATROSKA_TRACK_TYPE_METADATA) {
3128		✗	av_log(matroska->ctx, AV_LOG_INFO,
3129			"Unknown or unsupported track type %"PRIu64"\n",
3130			track->type);
3131		✗	continue;
3132			}
3133	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (!track->codec_id)
3134		✗	continue;
3135
3136	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 357 times. ✓ Branch 2 taken 84 times. ✗ Branch 3 not taken.	441	if ( track->type == MATROSKA_TRACK_TYPE_AUDIO && track->codec_id[0] != 'A'
3137	3/4 ✓ Branch 0 taken 333 times. ✓ Branch 1 taken 108 times. ✓ Branch 2 taken 333 times. ✗ Branch 3 not taken.	441	|| track->type == MATROSKA_TRACK_TYPE_VIDEO && track->codec_id[0] != 'V'
3138	5/6 ✓ Branch 0 taken 20 times. ✓ Branch 1 taken 421 times. ✓ Branch 2 taken 16 times. ✓ Branch 3 taken 4 times. ✓ Branch 4 taken 16 times. ✗ Branch 5 not taken.	441	|| track->type == MATROSKA_TRACK_TYPE_SUBTITLE && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
3139	3/6 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 437 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 4 times. ✗ Branch 4 not taken. ✗ Branch 5 not taken.	441	|| track->type == MATROSKA_TRACK_TYPE_METADATA && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
3140			) {
3141		✗	av_log(matroska->ctx, AV_LOG_INFO, "Inconsistent track type\n");
3142		✗	continue;
3143			}
3144
3145	2/4 ✓ Branch 0 taken 441 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 441 times. ✗ Branch 3 not taken.	441	if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
3146	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	isnan(track->audio.samplerate)) {
3147		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3148			"Invalid sample rate %f, defaulting to 8000 instead.\n",
3149			track->audio.samplerate);
3150		✗	track->audio.samplerate = 8000;
3151			}
3152
3153	2/2 ✓ Branch 0 taken 333 times. ✓ Branch 1 taken 108 times.	441	if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
3154	4/4 ✓ Branch 0 taken 246 times. ✓ Branch 1 taken 87 times. ✓ Branch 2 taken 204 times. ✓ Branch 3 taken 42 times.	333	if (!track->default_duration && track->video.frame_rate > 0) {
3155		204	double default_duration = 1000000000 / track->video.frame_rate;
3156	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) {
3157		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3158			"Invalid frame rate %e. Cannot calculate default duration.\n",
3159			track->video.frame_rate);
3160			} else {
3161		204	track->default_duration = default_duration;
3162			}
3163			}
3164	1/2 ✓ Branch 0 taken 333 times. ✗ Branch 1 not taken.	333	if (track->video.pixel_cropl >= INT_MAX - track->video.pixel_cropr ||
3165	1/2 ✓ Branch 0 taken 333 times. ✗ Branch 1 not taken.	333	track->video.pixel_cropt >= INT_MAX - track->video.pixel_cropb ||
3166	1/2 ✓ Branch 0 taken 333 times. ✗ Branch 1 not taken.	333	(track->video.pixel_cropl + track->video.pixel_cropr) >= track->video.pixel_width ||
3167	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	(track->video.pixel_cropt + track->video.pixel_cropb) >= track->video.pixel_height)
3168		✗	return AVERROR_INVALIDDATA;
3169		333	track->video.cropped_width = track->video.pixel_width -
3170		333	track->video.pixel_cropl - track->video.pixel_cropr;
3171		333	track->video.cropped_height = track->video.pixel_height -
3172		333	track->video.pixel_cropt - track->video.pixel_cropb;
3173	2/2 ✓ Branch 0 taken 296 times. ✓ Branch 1 taken 37 times.	333	if (track->video.display_unit == MATROSKA_VIDEO_DISPLAYUNIT_PIXELS) {
3174	2/2 ✓ Branch 0 taken 263 times. ✓ Branch 1 taken 33 times.	296	if (track->video.display_width == -1)
3175		263	track->video.display_width = track->video.cropped_width;
3176	2/2 ✓ Branch 0 taken 263 times. ✓ Branch 1 taken 33 times.	296	if (track->video.display_height == -1)
3177		263	track->video.display_height = track->video.cropped_height;
3178			}
3179	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 24 times.	108	} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
3180	2/2 ✓ Branch 0 taken 83 times. ✓ Branch 1 taken 1 times.	84	if (!track->audio.out_samplerate)
3181		83	track->audio.out_samplerate = track->audio.samplerate;
3182			}
3183		441	ret = matroska_parse_content_encodings(track->encodings.elem,
3184		441	track->encodings.nb_elem,
3185		441	track, &key_id_base64, matroska->ctx);
3186	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (ret < 0)
3187		✗	return ret;
3188
3189	2/2 ✓ Branch 0 taken 26107 times. ✓ Branch 1 taken 7 times.	26114	for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
3190	2/2 ✓ Branch 1 taken 434 times. ✓ Branch 2 taken 25673 times.	26107	if (av_strstart(track->codec_id, ff_mkv_codec_tags[j].str, NULL)) {
3191		434	codec_id = ff_mkv_codec_tags[j].id;
3192		434	break;
3193			}
3194			}
3195
3196		441	st = track->stream = avformat_new_stream(s, NULL);
3197	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (!st) {
3198		✗	av_free(key_id_base64);
3199		✗	return AVERROR(ENOMEM);
3200			}
3201		441	par = st->codecpar;
3202
3203		441	par->codec_id = codec_id;
3204
3205	2/2 ✓ Branch 0 taken 353 times. ✓ Branch 1 taken 88 times.	441	if (track->flag_default)
3206		353	st->disposition |= AV_DISPOSITION_DEFAULT;
3207	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 437 times.	441	if (track->flag_forced)
3208		4	st->disposition |= AV_DISPOSITION_FORCED;
3209	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 439 times.	441	if (track->flag_comment)
3210		2	st->disposition |= AV_DISPOSITION_COMMENT;
3211	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 433 times.	441	if (track->flag_hearingimpaired)
3212		8	st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
3213	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 439 times.	441	if (track->flag_visualimpaired)
3214		2	st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
3215	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 437 times.	441	if (track->flag_original.count > 0)
3216		4	st->disposition |= track->flag_original.el.u ? AV_DISPOSITION_ORIGINAL
3217	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	: AV_DISPOSITION_DUB;
3218
3219	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (key_id_base64) {
3220			/* export encryption key id as base64 metadata tag */
3221		✗	av_dict_set(&st->metadata, "enc_key_id", key_id_base64,
3222			AV_DICT_DONT_STRDUP_VAL);
3223			}
3224
3225	2/2 ✓ Branch 0 taken 323 times. ✓ Branch 1 taken 118 times.	441	if (strcmp(track->language, "und"))
3226		323	av_dict_set(&st->metadata, "language", track->language, 0);
3227		441	av_dict_set(&st->metadata, "title", track->name, 0);
3228
3229	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (track->time_scale < 0.01) {
3230		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3231			"Track TimestampScale too small %f, assuming 1.0.\n",
3232			track->time_scale);
3233		✗	track->time_scale = 1.0;
3234			}
3235
3236	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (matroska->time_scale * track->time_scale > UINT_MAX)
3237		✗	return AVERROR_INVALIDDATA;
3238
3239		441	avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
3240			1000 * 1000 * 1000); /* 64 bit pts in ns */
3241
3242			/* convert the delay from ns to the track timebase */
3243		441	track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
3244		441	(AVRational){ 1, 1000000000 },
3245			st->time_base);
3246
3247		441	type = track->type;
3248	2/2 ✓ Branch 0 taken 8 times. ✓ Branch 1 taken 433 times.	441	if (par->codec_id == AV_CODEC_ID_WEBVTT)
3249		8	type = MATROSKA_TRACK_TYPE_SUBTITLE;
3250	3/4 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 333 times. ✓ Branch 2 taken 24 times. ✗ Branch 3 not taken.	441	switch (type) {
3251		84	case MATROSKA_TRACK_TYPE_AUDIO:
3252		84	ret = mka_parse_audio(track, st, par, matroska,
3253			s, &extradata_offset);
3254	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret < 0)
3255		✗	return ret;
3256	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times.	84	if (ret == SKIP_TRACK)
3257		✗	continue;
3258		84	break;
3259		333	case MATROSKA_TRACK_TYPE_VIDEO:
3260		333	ret = mkv_parse_video(track, st, par, matroska, &extradata_offset);
3261	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 333 times.	333	if (ret < 0)
3262		✗	return ret;
3263		333	break;
3264		24	case MATROSKA_TRACK_TYPE_SUBTITLE:
3265		24	ret = mkv_parse_subtitle_codec(track, st, par, matroska);
3266	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (ret < 0)
3267		✗	return ret;
3268		24	par->codec_type = AVMEDIA_TYPE_SUBTITLE;
3269
3270	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (track->flag_textdescriptions)
3271		✗	st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
3272		24	break;
3273			}
3274
3275	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (par->codec_id == AV_CODEC_ID_NONE)
3276		✗	av_log(matroska->ctx, AV_LOG_INFO,
3277			"Unknown/unsupported AVCodecID %s.\n", track->codec_id);
3278
3279	4/4 ✓ Branch 0 taken 434 times. ✓ Branch 1 taken 7 times. ✓ Branch 2 taken 132 times. ✓ Branch 3 taken 302 times.	441	if (!par->extradata && track->codec_priv.size > extradata_offset) {
3280		132	const uint8_t *src = track->codec_priv.data + extradata_offset;
3281		132	unsigned extra_size = track->codec_priv.size - extradata_offset;
3282		132	ret = ff_alloc_extradata(par, extra_size);
3283	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 132 times.	132	if (ret < 0)
3284		✗	return ret;
3285		132	memcpy(par->extradata, src, extra_size);
3286			}
3287
3288		441	ret = mkv_parse_block_addition_mappings(s, st, track);
3289	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 441 times.	441	if (ret < 0)
3290		✗	return ret;
3291			}
3292
3293		370	return 0;
3294			}
3295
3296		370	static int matroska_read_header(AVFormatContext *s)
3297			{
3298		370	FFFormatContext *const si = ffformatcontext(s);
3299		370	MatroskaDemuxContext *matroska = s->priv_data;
3300		370	EbmlList *attachments_list = &matroska->attachments;
3301		370	EbmlList *chapters_list = &matroska->chapters;
3302			MatroskaAttachment *attachments;
3303			MatroskaChapter *chapters;
3304		370	uint64_t max_start = 0;
3305			int64_t pos;
3306		370	Ebml ebml = { 0 };
3307			int i, j, res;
3308
3309		370	matroska->ctx = s;
3310		370	matroska->cues_parsing_deferred = 1;
3311
3312			/* First read the EBML header. */
3313	2/4 ✓ Branch 1 taken 370 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 370 times.	370	if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
3314		✗	av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
3315		✗	ebml_free(ebml_syntax, &ebml);
3316		✗	return AVERROR_INVALIDDATA;
3317			}
3318	1/2 ✓ Branch 0 taken 370 times. ✗ Branch 1 not taken.	370	if (ebml.version > EBML_VERSION ||
3319	1/2 ✓ Branch 0 taken 370 times. ✗ Branch 1 not taken.	370	ebml.max_size > sizeof(uint64_t) ||
3320	1/2 ✓ Branch 0 taken 370 times. ✗ Branch 1 not taken.	370	ebml.id_length > sizeof(uint32_t) ||
3321	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	ebml.doctype_version > 3) {
3322		✗	avpriv_report_missing_feature(matroska->ctx,
3323			"EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
3324			ebml.version, ebml.doctype, ebml.doctype_version);
3325		✗	ebml_free(ebml_syntax, &ebml);
3326		✗	return AVERROR_PATCHWELCOME;
3327	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	} else if (ebml.doctype_version == 3) {
3328		✗	av_log(matroska->ctx, AV_LOG_WARNING,
3329			"EBML header using unsupported features\n"
3330			"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
3331			ebml.version, ebml.doctype, ebml.doctype_version);
3332			}
3333	1/2 ✓ Branch 0 taken 638 times. ✗ Branch 1 not taken.	638	for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
3334	2/2 ✓ Branch 0 taken 370 times. ✓ Branch 1 taken 268 times.	638	if (!strcmp(ebml.doctype, matroska_doctypes[i]))
3335		370	break;
3336	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
3337		✗	av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
3338		✗	if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
3339		✗	ebml_free(ebml_syntax, &ebml);
3340		✗	return AVERROR_INVALIDDATA;
3341			}
3342			}
3343		370	matroska->is_webm = !strcmp(ebml.doctype, "webm");
3344
3345		370	ebml_free(ebml_syntax, &ebml);
3346
3347		370	matroska->pkt = si->parse_pkt;
3348
3349			/* The next thing is a segment. */
3350		370	pos = avio_tell(matroska->ctx->pb);
3351		370	res = ebml_parse(matroska, matroska_segments, matroska);
3352			// Try resyncing until we find an EBML_STOP type element.
3353	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	while (res != 1) {
3354		✗	res = matroska_resync(matroska, pos);
3355		✗	if (res < 0)
3356		✗	return res;
3357		✗	pos = avio_tell(matroska->ctx->pb);
3358		✗	res = ebml_parse(matroska, matroska_segment, matroska);
3359		✗	if (res == AVERROR(EIO)) // EOF is translated to EIO, this exists the loop on EOF
3360		✗	return res;
3361			}
3362			/* Set data_offset as it might be needed later by seek_frame_generic. */
3363	2/2 ✓ Branch 0 taken 366 times. ✓ Branch 1 taken 4 times.	370	if (matroska->current_id == MATROSKA_ID_CLUSTER)
3364		366	si->data_offset = avio_tell(matroska->ctx->pb) - 4;
3365		370	matroska_execute_seekhead(matroska);
3366
3367	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	if (!matroska->time_scale)
3368		✗	matroska->time_scale = 1000000;
3369	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	if (isnan(matroska->duration))
3370		✗	matroska->duration = 0;
3371	2/2 ✓ Branch 0 taken 359 times. ✓ Branch 1 taken 11 times.	370	if (matroska->duration)
3372		359	matroska->ctx->duration = matroska->duration * matroska->time_scale *
3373		359	1000 / AV_TIME_BASE;
3374		370	av_dict_set(&s->metadata, "title", matroska->title, 0);
3375		370	av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
3376
3377	2/2 ✓ Branch 0 taken 18 times. ✓ Branch 1 taken 352 times.	370	if (matroska->date_utc.size == 8)
3378		18	matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
3379
3380		370	res = matroska_parse_tracks(s);
3381	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 370 times.	370	if (res < 0)
3382		✗	return res;
3383
3384		370	attachments = attachments_list->elem;
3385	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 370 times.	374	for (j = 0; j < attachments_list->nb_elem; j++) {
3386	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 &&
3387	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)) {
3388		✗	av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
3389			} else {
3390		4	AVStream *st = avformat_new_stream(s, NULL);
3391	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (!st)
3392		✗	break;
3393		4	av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
3394		4	av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
3395	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (attachments[j].description)
3396		✗	av_dict_set(&st->metadata, "title", attachments[j].description, 0);
3397		4	st->codecpar->codec_id = AV_CODEC_ID_NONE;
3398
3399	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++) {
3400	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)) {
3401		✗	st->codecpar->codec_id = mkv_image_mime_tags[i].id;
3402		✗	break;
3403			}
3404			}
3405
3406		4	attachments[j].stream = st;
3407
3408	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
3409		✗	res = ff_add_attached_pic(s, st, NULL, &attachments[j].bin.buf, 0);
3410		✗	if (res < 0)
3411		✗	return res;
3412			} else {
3413		4	st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
3414	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
3415		✗	break;
3416		4	memcpy(st->codecpar->extradata, attachments[j].bin.data,
3417		4	attachments[j].bin.size);
3418
3419	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++) {
3420	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if (av_strstart(attachments[j].mime, mkv_mime_tags[i].str, NULL)) {
3421		✗	st->codecpar->codec_id = mkv_mime_tags[i].id;
3422		✗	break;
3423			}
3424			}
3425			}
3426			}
3427			}
3428
3429		370	chapters = chapters_list->elem;
3430	2/2 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 370 times.	384	for (i = 0; i < chapters_list->nb_elem; i++)
3431	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 &&
3432	1/2 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken.	4	(max_start == 0 || chapters[i].start > max_start)) {
3433		28	chapters[i].chapter =
3434		14	avpriv_new_chapter(s, chapters[i].uid,
3435		14	(AVRational) { 1, 1000000000 },
3436		14	chapters[i].start, chapters[i].end,
3437		14	chapters[i].title);
3438		14	max_start = chapters[i].start;
3439			}
3440
3441		370	matroska_add_index_entries(matroska);
3442
3443		370	matroska_convert_tags(s);
3444
3445		370	return 0;
3446			}
3447
3448			/*
3449			* Put one packet in an application-supplied AVPacket struct.
3450			* Returns 0 on success or -1 on failure.
3451			*/
3452		60208	static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
3453			AVPacket *pkt)
3454			{
3455	2/2 ✓ Branch 0 taken 29484 times. ✓ Branch 1 taken 30724 times.	60208	if (matroska->queue.head) {
3456		29484	MatroskaTrack *tracks = matroska->tracks.elem;
3457			MatroskaTrack *track;
3458
3459		29484	avpriv_packet_list_get(&matroska->queue, pkt);
3460		29484	track = &tracks[pkt->stream_index];
3461	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29484 times.	29484	if (track->has_palette) {
3462		✗	uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3463		✗	if (!pal) {
3464		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
3465			} else {
3466		✗	memcpy(pal, track->palette, AVPALETTE_SIZE);
3467			}
3468		✗	track->has_palette = 0;
3469			}
3470		29484	return 0;
3471			}
3472
3473		30724	return -1;
3474			}
3475
3476			/*
3477			* Free all packets in our internal queue.
3478			*/
3479		1208	static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3480			{
3481		1208	avpriv_packet_list_free(&matroska->queue);
3482		1208	}
3483
3484		29854	static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3485			int size, int type, AVIOContext *pb,
3486			uint32_t lace_size[256], int *laces)
3487			{
3488			int n;
3489		29854	uint8_t *data = *buf;
3490
3491	2/2 ✓ Branch 0 taken 29779 times. ✓ Branch 1 taken 75 times.	29854	if (!type) {
3492		29779	*laces = 1;
3493		29779	lace_size[0] = size;
3494		29779	return 0;
3495			}
3496
3497	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 75 times.	75	if (size <= 0)
3498		✗	return AVERROR_INVALIDDATA;
3499
3500		75	*laces = *data + 1;
3501		75	data += 1;
3502		75	size -= 1;
3503
3504	3/4 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 17 times. ✓ Branch 2 taken 54 times. ✗ Branch 3 not taken.	75	switch (type) {
3505		4	case 0x1: /* Xiph lacing */
3506			{
3507			uint8_t temp;
3508		4	uint32_t total = 0;
3509	2/2 ✓ Branch 0 taken 23 times. ✓ Branch 1 taken 4 times.	27	for (n = 0; n < *laces - 1; n++) {
3510		23	lace_size[n] = 0;
3511
3512			do {
3513	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 25 times.	25	if (size <= total)
3514		✗	return AVERROR_INVALIDDATA;
3515		25	temp = *data;
3516		25	total += temp;
3517		25	lace_size[n] += temp;
3518		25	data += 1;
3519		25	size -= 1;
3520	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 23 times.	25	} while (temp == 0xff);
3521			}
3522	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 4 times.	4	if (size < total)
3523		✗	return AVERROR_INVALIDDATA;
3524
3525		4	lace_size[n] = size - total;
3526		4	break;
3527			}
3528
3529		17	case 0x2: /* fixed-size lacing */
3530	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 17 times.	17	if (size % (*laces))
3531		✗	return AVERROR_INVALIDDATA;
3532	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 17 times.	98	for (n = 0; n < *laces; n++)
3533		81	lace_size[n] = size / *laces;
3534		17	break;
3535
3536		54	case 0x3: /* EBML lacing */
3537			{
3538			uint64_t num;
3539			uint64_t total;
3540			int offset;
3541
3542		54	avio_skip(pb, 4);
3543
3544		54	n = ebml_read_num(matroska, pb, 8, &num, 1);
3545	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (n < 0)
3546		✗	return n;
3547	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (num > INT_MAX)
3548		✗	return AVERROR_INVALIDDATA;
3549
3550		54	total = lace_size[0] = num;
3551		54	offset = n;
3552	2/2 ✓ Branch 0 taken 236 times. ✓ Branch 1 taken 54 times.	290	for (n = 1; n < *laces - 1; n++) {
3553			int64_t snum;
3554			int r;
3555		236	r = matroska_ebmlnum_sint(matroska, pb, &snum);
3556	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (r < 0)
3557		✗	return r;
3558	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 236 times.	236	if (lace_size[n - 1] + snum > (uint64_t)INT_MAX)
3559		✗	return AVERROR_INVALIDDATA;
3560
3561		236	lace_size[n] = lace_size[n - 1] + snum;
3562		236	total += lace_size[n];
3563		236	offset += r;
3564			}
3565		54	data += offset;
3566		54	size -= offset;
3567	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 54 times.	54	if (size < total)
3568		✗	return AVERROR_INVALIDDATA;
3569
3570		54	lace_size[*laces - 1] = size - total;
3571		54	break;
3572			}
3573			}
3574
3575		75	*buf = data;
3576
3577		75	return 0;
3578			}
3579
3580		✗	static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3581			MatroskaTrack *track, AVStream *st,
3582			uint8_t *data, int size, uint64_t timecode,
3583			int64_t pos)
3584			{
3585		✗	const int a = st->codecpar->block_align;
3586		✗	const int sps = track->audio.sub_packet_size;
3587		✗	const int cfs = track->audio.coded_framesize;
3588		✗	const int h = track->audio.sub_packet_h;
3589		✗	const int w = track->audio.frame_size;
3590		✗	int y = track->audio.sub_packet_cnt;
3591			int x;
3592
3593		✗	if (!track->audio.pkt_cnt) {
3594		✗	if (track->audio.sub_packet_cnt == 0)
3595		✗	track->audio.buf_timecode = timecode;
3596		✗	if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3597		✗	if (size < cfs * h / 2) {
3598		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3599			"Corrupt int4 RM-style audio packet size\n");
3600		✗	return AVERROR_INVALIDDATA;
3601			}
3602		✗	for (x = 0; x < h / 2; x++)
3603		✗	memcpy(track->audio.buf + x * 2 * w + y * cfs,
3604		✗	data + x * cfs, cfs);
3605		✗	} else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3606		✗	if (size < w) {
3607		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3608			"Corrupt sipr RM-style audio packet size\n");
3609		✗	return AVERROR_INVALIDDATA;
3610			}
3611		✗	memcpy(track->audio.buf + y * w, data, w);
3612			} else {
3613		✗	if (size < w) {
3614		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3615			"Corrupt generic RM-style audio packet size\n");
3616		✗	return AVERROR_INVALIDDATA;
3617			}
3618		✗	for (x = 0; x < w / sps; x++)
3619		✗	memcpy(track->audio.buf +
3620		✗	sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3621		✗	data + x * sps, sps);
3622			}
3623
3624		✗	if (++track->audio.sub_packet_cnt >= h) {
3625		✗	if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3626		✗	ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3627		✗	track->audio.sub_packet_cnt = 0;
3628		✗	track->audio.pkt_cnt = h * w / a;
3629			}
3630			}
3631
3632		✗	while (track->audio.pkt_cnt) {
3633			int ret;
3634		✗	AVPacket *pkt = matroska->pkt;
3635
3636		✗	ret = av_new_packet(pkt, a);
3637		✗	if (ret < 0) {
3638		✗	return ret;
3639			}
3640		✗	memcpy(pkt->data,
3641		✗	track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3642			a);
3643		✗	pkt->pts = track->audio.buf_timecode;
3644		✗	track->audio.buf_timecode = AV_NOPTS_VALUE;
3645		✗	pkt->pos = pos;
3646		✗	pkt->stream_index = st->index;
3647		✗	ret = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3648		✗	if (ret < 0) {
3649		✗	av_packet_unref(pkt);
3650		✗	return AVERROR(ENOMEM);
3651			}
3652			}
3653
3654		✗	return 0;
3655			}
3656
3657			/* reconstruct full wavpack blocks from mangled matroska ones */
3658		24	static int matroska_parse_wavpack(MatroskaTrack *track,
3659			uint8_t **data, int *size)
3660			{
3661		24	uint8_t *dst = NULL;
3662		24	uint8_t *src = *data;
3663		24	int dstlen = 0;
3664		24	int srclen = *size;
3665			uint32_t samples;
3666			uint16_t ver;
3667		24	int ret, offset = 0;
3668
3669	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (srclen < 12)
3670		✗	return AVERROR_INVALIDDATA;
3671
3672			av_assert1(track->stream->codecpar->extradata_size >= 2);
3673		24	ver = AV_RL16(track->stream->codecpar->extradata);
3674
3675		24	samples = AV_RL32(src);
3676		24	src += 4;
3677		24	srclen -= 4;
3678
3679	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 24 times.	136	while (srclen >= 8) {
3680			int multiblock;
3681			uint32_t blocksize;
3682			uint8_t *tmp;
3683
3684		112	uint32_t flags = AV_RL32(src);
3685		112	uint32_t crc = AV_RL32(src + 4);
3686		112	src += 8;
3687		112	srclen -= 8;
3688
3689		112	multiblock = (flags & 0x1800) != 0x1800;
3690	2/2 ✓ Branch 0 taken 110 times. ✓ Branch 1 taken 2 times.	112	if (multiblock) {
3691	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 110 times.	110	if (srclen < 4) {
3692		✗	ret = AVERROR_INVALIDDATA;
3693		✗	goto fail;
3694			}
3695		110	blocksize = AV_RL32(src);
3696		110	src += 4;
3697		110	srclen -= 4;
3698			} else
3699		2	blocksize = srclen;
3700
3701	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (blocksize > srclen) {
3702		✗	ret = AVERROR_INVALIDDATA;
3703		✗	goto fail;
3704			}
3705
3706		112	tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3707	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 112 times.	112	if (!tmp) {
3708		✗	ret = AVERROR(ENOMEM);
3709		✗	goto fail;
3710			}
3711		112	dst = tmp;
3712		112	dstlen += blocksize + 32;
3713
3714		112	AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3715		112	AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3716		112	AV_WL16(dst + offset + 8, ver); // version
3717		112	AV_WL16(dst + offset + 10, 0); // track/index_no
3718		112	AV_WL32(dst + offset + 12, 0); // total samples
3719		112	AV_WL32(dst + offset + 16, 0); // block index
3720		112	AV_WL32(dst + offset + 20, samples); // number of samples
3721		112	AV_WL32(dst + offset + 24, flags); // flags
3722		112	AV_WL32(dst + offset + 28, crc); // crc
3723		112	memcpy(dst + offset + 32, src, blocksize); // block data
3724
3725		112	src += blocksize;
3726		112	srclen -= blocksize;
3727		112	offset += blocksize + 32;
3728			}
3729
3730		24	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3731
3732		24	*data = dst;
3733		24	*size = dstlen;
3734
3735		24	return 0;
3736
3737		✗	fail:
3738		✗	av_freep(&dst);
3739		✗	return ret;
3740			}
3741
3742		11	static int matroska_parse_prores(MatroskaTrack *track,
3743			uint8_t **data, int *size)
3744			{
3745			uint8_t *dst;
3746		11	int dstlen = *size + 8;
3747
3748		11	dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3749	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (!dst)
3750		✗	return AVERROR(ENOMEM);
3751
3752		11	AV_WB32(dst, dstlen);
3753		11	AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3754		11	memcpy(dst + 8, *data, dstlen - 8);
3755		11	memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3756
3757		11	*data = dst;
3758		11	*size = dstlen;
3759
3760		11	return 0;
3761			}
3762
3763		90	static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3764			MatroskaTrack *track,
3765			AVStream *st,
3766			uint8_t *data, int data_len,
3767			uint64_t timecode,
3768			uint64_t duration,
3769			int64_t pos)
3770			{
3771		90	AVPacket *pkt = matroska->pkt;
3772			uint8_t *id, *settings, *text, *buf;
3773			int id_len, settings_len, text_len;
3774			uint8_t *p, *q;
3775			int err;
3776
3777	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (data_len <= 0)
3778		✗	return AVERROR_INVALIDDATA;
3779
3780		90	p = data;
3781		90	q = data + data_len;
3782
3783		90	id = p;
3784		90	id_len = -1;
3785	1/2 ✓ Branch 0 taken 192 times. ✗ Branch 1 not taken.	192	while (p < q) {
3786	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') {
3787		90	id_len = p - id;
3788	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3789		✗	p++;
3790		90	break;
3791			}
3792		102	p++;
3793			}
3794
3795	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')
3796		✗	return AVERROR_INVALIDDATA;
3797		90	p++;
3798
3799		90	settings = p;
3800		90	settings_len = -1;
3801	1/2 ✓ Branch 0 taken 546 times. ✗ Branch 1 not taken.	546	while (p < q) {
3802	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') {
3803		90	settings_len = p - settings;
3804	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (*p == '\r')
3805		✗	p++;
3806		90	break;
3807			}
3808		456	p++;
3809			}
3810
3811	2/4 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 90 times.	90	if (p >= q || *p != '\n')
3812		✗	return AVERROR_INVALIDDATA;
3813		90	p++;
3814
3815		90	text = p;
3816		90	text_len = q - p;
3817	1/2 ✓ Branch 0 taken 90 times. ✗ Branch 1 not taken.	90	while (text_len > 0) {
3818		90	const int len = text_len - 1;
3819		90	const uint8_t c = p[len];
3820	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')
3821		90	break;
3822		✗	text_len = len;
3823			}
3824
3825	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (text_len <= 0)
3826		✗	return AVERROR_INVALIDDATA;
3827
3828		90	err = av_new_packet(pkt, text_len);
3829	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3830		✗	return err;
3831			}
3832
3833		90	memcpy(pkt->data, text, text_len);
3834
3835	2/2 ✓ Branch 0 taken 12 times. ✓ Branch 1 taken 78 times.	90	if (id_len > 0) {
3836		12	buf = av_packet_new_side_data(pkt,
3837			AV_PKT_DATA_WEBVTT_IDENTIFIER,
3838			id_len);
3839	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 12 times.	12	if (!buf) {
3840		✗	av_packet_unref(pkt);
3841		✗	return AVERROR(ENOMEM);
3842			}
3843		12	memcpy(buf, id, id_len);
3844			}
3845
3846	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 66 times.	90	if (settings_len > 0) {
3847		24	buf = av_packet_new_side_data(pkt,
3848			AV_PKT_DATA_WEBVTT_SETTINGS,
3849			settings_len);
3850	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (!buf) {
3851		✗	av_packet_unref(pkt);
3852		✗	return AVERROR(ENOMEM);
3853			}
3854		24	memcpy(buf, settings, settings_len);
3855			}
3856
3857			// Do we need this for subtitles?
3858			// pkt->flags = AV_PKT_FLAG_KEY;
3859
3860		90	pkt->stream_index = st->index;
3861		90	pkt->pts = timecode;
3862
3863			// Do we need this for subtitles?
3864			// pkt->dts = timecode;
3865
3866		90	pkt->duration = duration;
3867		90	pkt->pos = pos;
3868
3869		90	err = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
3870	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (err < 0) {
3871		✗	av_packet_unref(pkt);
3872		✗	return AVERROR(ENOMEM);
3873			}
3874
3875		90	return 0;
3876			}
3877
3878		136	static int matroska_parse_block_additional(MatroskaDemuxContext *matroska,
3879			MatroskaTrack *track, AVPacket *pkt,
3880			const uint8_t *data, int size, uint64_t id)
3881			{
3882		136	const EbmlList *mappings_list = &track->block_addition_mappings;
3883		136	MatroskaBlockAdditionMapping *mappings = mappings_list->elem, *mapping = NULL;
3884			uint8_t *side_data;
3885			int res;
3886
3887	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) {
3888		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
3889		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
3890			"BlockAddID %"PRIu64" is higher than the reported MaxBlockAdditionID %"PRIu64" "
3891			"for Track with TrackNumber %"PRIu64"\n", id, track->max_block_additional_id,
3892			track->num);
3893		✗	if (strict)
3894		✗	return AVERROR_INVALIDDATA;
3895			}
3896
3897	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 134 times.	136	for (int i = 0; i < mappings_list->nb_elem; i++) {
3898	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (id != mappings[i].value)
3899		✗	continue;
3900		2	mapping = &mappings[i];
3901		2	break;
3902			}
3903
3904	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) {
3905		✗	av_log(matroska->ctx, AV_LOG_WARNING, "BlockAddID %"PRIu64" has no mapping. Skipping\n", id);
3906		✗	return 0;
3907			}
3908
3909	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)
3910		2	id = mapping->type;
3911
3912	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 130 times.	136	switch (id) {
3913		6	case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35: {
3914			GetByteContext bc;
3915			int country_code, provider_code;
3916			int provider_oriented_code, application_identifier;
3917			size_t hdrplus_size;
3918			AVDynamicHDRPlus *hdrplus;
3919
3920	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (size < 6)
3921		✗	break; //ignore
3922
3923		6	bytestream2_init(&bc, data, size);
3924
3925			/* ITU-T T.35 metadata */
3926		6	country_code = bytestream2_get_byteu(&bc);
3927		6	provider_code = bytestream2_get_be16u(&bc);
3928
3929	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 ||
3930			provider_code != ITU_T_T35_PROVIDER_CODE_SMTPE)
3931			break; // ignore
3932
3933		6	provider_oriented_code = bytestream2_get_be16u(&bc);
3934		6	application_identifier = bytestream2_get_byteu(&bc);
3935
3936	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)
3937			break; // ignore
3938
3939		6	hdrplus = av_dynamic_hdr_plus_alloc(&hdrplus_size);
3940	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 6 times.	6	if (!hdrplus)
3941		6	return AVERROR(ENOMEM);
3942
3943	1/2 ✓ Branch 1 taken 6 times. ✗ Branch 2 not taken.	6	if ((res = av_dynamic_hdr_plus_from_t35(hdrplus, bc.buffer,
3944	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 6 times.	12	bytestream2_get_bytes_left(&bc))) < 0 ||
3945		6	(res = av_packet_add_side_data(pkt, AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
3946			(uint8_t *)hdrplus, hdrplus_size)) < 0) {
3947		✗	av_free(hdrplus);
3948		✗	return res;
3949			}
3950
3951		6	return 0;
3952			}
3953		130	default:
3954		130	break;
3955			}
3956
3957		130	side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3958			size + (size_t)8);
3959	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 130 times.	130	if (!side_data)
3960		✗	return AVERROR(ENOMEM);
3961
3962		130	AV_WB64(side_data, id);
3963		130	memcpy(side_data + 8, data, size);
3964
3965		130	return 0;
3966			}
3967
3968		30141	static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3969			MatroskaTrack *track, AVStream *st,
3970			AVBufferRef *buf, uint8_t *data, int pkt_size,
3971			uint64_t timecode, uint64_t lace_duration,
3972			int64_t pos, int is_keyframe,
3973			MatroskaBlockMore *blockmore, int nb_blockmore,
3974			int64_t discard_padding)
3975			{
3976		30141	uint8_t *pkt_data = data;
3977		30141	int res = 0;
3978		30141	AVPacket *pkt = matroska->pkt;
3979
3980	2/2 ✓ Branch 0 taken 24 times. ✓ Branch 1 taken 30117 times.	30141	if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3981		24	res = matroska_parse_wavpack(track, &pkt_data, &pkt_size);
3982	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 24 times.	24	if (res < 0) {
3983		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3984			"Error parsing a wavpack block.\n");
3985		✗	goto fail;
3986			}
3987	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 22 times.	24	if (!buf)
3988		2	av_freep(&data);
3989		24	buf = NULL;
3990			}
3991
3992	2/2 ✓ Branch 0 taken 13 times. ✓ Branch 1 taken 30128 times.	30141	if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3993	2/2 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 2 times.	13	AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
3994		11	res = matroska_parse_prores(track, &pkt_data, &pkt_size);
3995	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11 times.	11	if (res < 0) {
3996		✗	av_log(matroska->ctx, AV_LOG_ERROR,
3997			"Error parsing a prores block.\n");
3998		✗	goto fail;
3999			}
4000	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 9 times.	11	if (!buf)
4001		2	av_freep(&data);
4002		11	buf = NULL;
4003			}
4004
4005	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 30141 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	30141	if (!pkt_size && !nb_blockmore)
4006		✗	goto no_output;
4007
4008	5/6 ✓ Branch 0 taken 26914 times. ✓ Branch 1 taken 3227 times. ✓ Branch 2 taken 12 times. ✓ Branch 3 taken 26902 times. ✗ Branch 4 not taken. ✓ Branch 5 taken 12 times.	30141	if (!matroska->is_webm && nb_blockmore && !track->max_block_additional_id) {
4009		✗	int strict = matroska->ctx->strict_std_compliance >= FF_COMPLIANCE_STRICT;
4010		✗	av_log(matroska->ctx, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
4011			"Unexpected BlockAdditions found in a Block from Track with TrackNumber %"PRIu64" "
4012			"where MaxBlockAdditionID is 0\n", track->num);
4013		✗	if (strict) {
4014		✗	res = AVERROR_INVALIDDATA;
4015		✗	goto fail;
4016			}
4017			}
4018
4019	2/2 ✓ Branch 0 taken 112 times. ✓ Branch 1 taken 30029 times.	30141	if (!buf)
4020		112	pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
4021			NULL, NULL, 0);
4022			else
4023		30029	pkt->buf = av_buffer_ref(buf);
4024
4025	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30141 times.	30141	if (!pkt->buf) {
4026		✗	res = AVERROR(ENOMEM);
4027		✗	goto fail;
4028			}
4029
4030		30141	pkt->data = pkt_data;
4031		30141	pkt->size = pkt_size;
4032		30141	pkt->flags = is_keyframe;
4033		30141	pkt->stream_index = st->index;
4034
4035	2/2 ✓ Branch 0 taken 136 times. ✓ Branch 1 taken 30141 times.	30277	for (int i = 0; i < nb_blockmore; i++) {
4036		136	MatroskaBlockMore *more = &blockmore[i];
4037
4038	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 136 times.	136	if (!more->additional.size)
4039		✗	continue;
4040
4041		136	res = matroska_parse_block_additional(matroska, track, pkt, more->additional.data,
4042			more->additional.size, more->additional_id);
4043	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 136 times.	136	if (res < 0) {
4044		✗	av_packet_unref(pkt);
4045		✗	return res;
4046			}
4047			}
4048
4049	2/2 ✓ Branch 0 taken 27 times. ✓ Branch 1 taken 30114 times.	30141	if (discard_padding) {
4050		27	uint8_t *side_data = av_packet_new_side_data(pkt,
4051			AV_PKT_DATA_SKIP_SAMPLES,
4052			10);
4053	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 27 times.	27	if (!side_data) {
4054		✗	av_packet_unref(pkt);
4055		✗	return AVERROR(ENOMEM);
4056			}
4057		27	discard_padding = av_rescale_q(discard_padding,
4058		27	(AVRational){1, 1000000000},
4059		27	(AVRational){1, st->codecpar->sample_rate});
4060	1/2 ✓ Branch 0 taken 27 times. ✗ Branch 1 not taken.	27	if (discard_padding > 0) {
4061		27	AV_WL32A(side_data + 4, discard_padding);
4062			} else {
4063		✗	AV_WL32A(side_data, -discard_padding);
4064			}
4065			}
4066
4067	2/2 ✓ Branch 0 taken 433 times. ✓ Branch 1 taken 29708 times.	30141	if (track->ms_compat)
4068		433	pkt->dts = timecode;
4069			else
4070		29708	pkt->pts = timecode;
4071		30141	pkt->pos = pos;
4072		30141	pkt->duration = lace_duration;
4073
4074		30141	res = avpriv_packet_list_put(&matroska->queue, pkt, NULL, 0);
4075	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30141 times.	30141	if (res < 0) {
4076		✗	av_packet_unref(pkt);
4077		✗	return AVERROR(ENOMEM);
4078			}
4079
4080		30141	return 0;
4081
4082		✗	no_output:
4083		✗	fail:
4084		✗	if (!buf)
4085		✗	av_free(pkt_data);
4086		✗	return res;
4087			}
4088
4089		30714	static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
4090			int size, int64_t pos, uint64_t cluster_time,
4091			uint64_t block_duration, int is_keyframe,
4092			MatroskaBlockMore *blockmore, int nb_blockmore,
4093			int64_t cluster_pos, int64_t discard_padding)
4094			{
4095		30714	uint64_t timecode = AV_NOPTS_VALUE;
4096			MatroskaTrack *track;
4097			FFIOContext pb;
4098		30714	int res = 0;
4099			AVStream *st;
4100			int16_t block_time;
4101			uint32_t lace_size[256];
4102		30714	int n, flags, laces = 0;
4103			uint64_t num;
4104			int trust_default_duration;
4105
4106			av_assert1(buf);
4107
4108		30714	ffio_init_read_context(&pb, data, size);
4109
4110	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 30714 times.	30714	if ((n = ebml_read_num(matroska, &pb.pub, 8, &num, 1)) < 0)
4111		✗	return n;
4112		30714	data += n;
4113		30714	size -= n;
4114
4115		30714	track = matroska_find_track_by_num(matroska, num);
4116	3/4 ✓ Branch 0 taken 30713 times. ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 30713 times.	30714	if (!track || size < 3)
4117		1	return AVERROR_INVALIDDATA;
4118
4119	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30713 times.	30713	if (!(st = track->stream)) {
4120		✗	av_log(matroska->ctx, AV_LOG_VERBOSE,
4121			"No stream associated to TrackNumber %"PRIu64". "
4122			"Ignoring Block with this TrackNumber.\n", num);
4123		✗	return 0;
4124			}
4125
4126	2/2 ✓ Branch 0 taken 311 times. ✓ Branch 1 taken 30402 times.	30713	if (st->discard >= AVDISCARD_ALL)
4127		311	return res;
4128	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30402 times.	30402	if (block_duration > INT64_MAX)
4129		✗	block_duration = INT64_MAX;
4130
4131		30402	block_time = sign_extend(AV_RB16(data), 16);
4132		30402	data += 2;
4133		30402	flags = *data++;
4134		30402	size -= 3;
4135	2/2 ✓ Branch 0 taken 29959 times. ✓ Branch 1 taken 443 times.	30402	if (is_keyframe == -1)
4136		29959	is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
4137
4138	3/4 ✓ Branch 0 taken 30402 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 79 times. ✓ Branch 3 taken 30323 times.	30402	if (cluster_time != (uint64_t) -1 &&
4139	2/2 ✓ Branch 0 taken 63 times. ✓ Branch 1 taken 16 times.	79	(block_time >= 0 || cluster_time >= -block_time)) {
4140		30386	uint64_t timecode_cluster_in_track_tb = (double) cluster_time / track->time_scale;
4141		30386	timecode = timecode_cluster_in_track_tb + block_time - track->codec_delay_in_track_tb;
4142	2/2 ✓ Branch 0 taken 128 times. ✓ Branch 1 taken 30258 times.	30386	if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
4143	2/2 ✓ Branch 0 taken 6 times. ✓ Branch 1 taken 122 times.	128	timecode < track->end_timecode)
4144		6	is_keyframe = 0; /* overlapping subtitles are not key frame */
4145	2/2 ✓ Branch 0 taken 26793 times. ✓ Branch 1 taken 3593 times.	30386	if (is_keyframe) {
4146		26793	ff_reduce_index(matroska->ctx, st->index);
4147		26793	av_add_index_entry(st, cluster_pos, timecode, 0, 0,
4148			AVINDEX_KEYFRAME);
4149			}
4150			}
4151
4152	2/2 ✓ Branch 0 taken 593 times. ✓ Branch 1 taken 29809 times.	30402	if (matroska->skip_to_keyframe &&
4153	1/2 ✓ Branch 0 taken 593 times. ✗ Branch 1 not taken.	593	track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
4154			// Compare signed timecodes. Timecode may be negative due to codec delay
4155			// offset. We don't support timestamps greater than int64_t anyway - see
4156			// AVPacket's pts.
4157	2/2 ✓ Branch 0 taken 548 times. ✓ Branch 1 taken 45 times.	593	if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
4158		548	return res;
4159	1/2 ✓ Branch 0 taken 45 times. ✗ Branch 1 not taken.	45	if (is_keyframe)
4160		45	matroska->skip_to_keyframe = 0;
4161		✗	else if (!ffstream(st)->skip_to_keyframe) {
4162		✗	av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
4163		✗	matroska->skip_to_keyframe = 0;
4164			}
4165			}
4166
4167		29854	res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
4168			&pb.pub, lace_size, &laces);
4169	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 29854 times.	29854	if (res < 0) {
4170		✗	av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing frame sizes.\n");
4171		✗	return res;
4172			}
4173
4174		29854	trust_default_duration = track->default_duration != 0;
4175	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 29854 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	29854	if (track->audio.samplerate == 8000 && trust_default_duration) {
4176			// If this is needed for more codecs, then add them here
4177		✗	if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
4178		✗	if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
4179		✗	trust_default_duration = 0;
4180			}
4181			}
4182
4183	4/4 ✓ Branch 0 taken 29574 times. ✓ Branch 1 taken 280 times. ✓ Branch 2 taken 4252 times. ✓ Branch 3 taken 25322 times.	29854	if (!block_duration && trust_default_duration)
4184		4252	block_duration = track->default_duration * laces / matroska->time_scale;
4185
4186	5/6 ✓ Branch 0 taken 29854 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 76 times. ✓ Branch 3 taken 29778 times. ✓ Branch 4 taken 60 times. ✓ Branch 5 taken 16 times.	29854	if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
4187		29838	track->end_timecode =
4188		29838	FFMAX(track->end_timecode, timecode + block_duration);
4189
4190	2/2 ✓ Branch 0 taken 30231 times. ✓ Branch 1 taken 29854 times.	60085	for (n = 0; n < laces; n++) {
4191		30231	int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
4192		30231	uint8_t *out_data = data;
4193		30231	int out_size = lace_size[n];
4194
4195	2/2 ✓ Branch 0 taken 81 times. ✓ Branch 1 taken 30150 times.	30231	if (track->needs_decoding) {
4196		81	res = matroska_decode_buffer(&out_data, &out_size, track);
4197	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 81 times.	81	if (res < 0)
4198		✗	return res;
4199			/* Given that we are here means that out_data is no longer
4200			* owned by buf, so set it to NULL. This depends upon
4201			* zero-length header removal compression being ignored. */
4202			av_assert1(out_data != data);
4203		81	buf = NULL;
4204			}
4205
4206	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30231 times.	30231	if (track->audio.buf) {
4207		✗	res = matroska_parse_rm_audio(matroska, track, st,
4208			out_data, out_size,
4209			timecode, pos);
4210		✗	if (!buf)
4211		✗	av_free(out_data);
4212		✗	if (res)
4213		✗	return res;
4214	2/2 ✓ Branch 0 taken 90 times. ✓ Branch 1 taken 30141 times.	30231	} else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
4215		90	res = matroska_parse_webvtt(matroska, track, st,
4216			out_data, out_size,
4217			timecode, lace_duration,
4218			pos);
4219	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (!buf)
4220		✗	av_free(out_data);
4221	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 90 times.	90	if (res)
4222		✗	return res;
4223			} else {
4224		30141	res = matroska_parse_frame(matroska, track, st, buf, out_data,
4225			out_size, timecode, lace_duration,
4226			pos, is_keyframe,
4227			blockmore, nb_blockmore,
4228			discard_padding);
4229	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30141 times.	30141	if (res)
4230		✗	return res;
4231			}
4232
4233	2/2 ✓ Branch 0 taken 30143 times. ✓ Branch 1 taken 88 times.	30231	if (timecode != AV_NOPTS_VALUE)
4234	2/2 ✓ Branch 0 taken 4821 times. ✓ Branch 1 taken 25322 times.	30143	timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
4235		30231	data += lace_size[n];
4236			}
4237
4238		29854	return 0;
4239			}
4240
4241		31114	static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
4242			{
4243		31114	MatroskaCluster *cluster = &matroska->current_cluster;
4244		31114	MatroskaBlock *block = &cluster->block;
4245			int res;
4246
4247	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 31114 times.	31114	av_assert0(matroska->num_levels <= 2U);
4248
4249	2/2 ✓ Branch 0 taken 1144 times. ✓ Branch 1 taken 29970 times.	31114	if (matroska->num_levels == 1) {
4250		1144	res = ebml_parse(matroska, matroska_segment, NULL);
4251
4252	2/2 ✓ Branch 0 taken 800 times. ✓ Branch 1 taken 344 times.	1144	if (res == 1) {
4253			/* Found a cluster: subtract the size of the ID already read. */
4254		800	cluster->pos = avio_tell(matroska->ctx->pb) - 4;
4255
4256		800	res = ebml_parse(matroska, matroska_cluster_enter, cluster);
4257	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 800 times.	800	if (res < 0)
4258		✗	return res;
4259			}
4260			}
4261
4262	2/2 ✓ Branch 0 taken 30729 times. ✓ Branch 1 taken 385 times.	31114	if (matroska->num_levels == 2) {
4263			/* We are inside a cluster. */
4264		30729	res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
4265
4266	4/4 ✓ Branch 0 taken 30719 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 30714 times. ✓ Branch 3 taken 5 times.	30729	if (res >= 0 && block->bin.size > 0) {
4267	2/2 ✓ Branch 0 taken 484 times. ✓ Branch 1 taken 30230 times.	30714	int is_keyframe = block->non_simple ? block->reference.count == 0 : -1;
4268
4269		30714	res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
4270			block->bin.size, block->bin.pos,
4271			cluster->timecode, block->duration,
4272		30714	is_keyframe, block->blockmore.elem,
4273			block->blockmore.nb_elem, cluster->pos,
4274			block->discard_padding);
4275			}
4276
4277		30729	ebml_free(matroska_blockgroup, block);
4278		30729	memset(block, 0, sizeof(*block));
4279	2/2 ✓ Branch 0 taken 357 times. ✓ Branch 1 taken 28 times.	385	} else if (!matroska->num_levels) {
4280	2/2 ✓ Branch 1 taken 350 times. ✓ Branch 2 taken 7 times.	357	if (!avio_feof(matroska->ctx->pb)) {
4281		350	avio_r8(matroska->ctx->pb);
4282	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 350 times.	350	if (!avio_feof(matroska->ctx->pb)) {
4283		✗	av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
4284			"end of segment.\n");
4285		✗	return AVERROR_INVALIDDATA;
4286			}
4287			}
4288		357	matroska->done = 1;
4289		357	return AVERROR_EOF;
4290			}
4291
4292		30757	return res;
4293			}
4294
4295		29867	static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
4296			{
4297		29867	MatroskaDemuxContext *matroska = s->priv_data;
4298		29867	int ret = 0;
4299
4300	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 29857 times.	29867	if (matroska->resync_pos == -1) {
4301			// This can only happen if generic seeking has been used.
4302		10	matroska->resync_pos = avio_tell(s->pb);
4303			}
4304
4305	2/2 ✓ Branch 1 taken 30724 times. ✓ Branch 2 taken 29484 times.	60208	while (matroska_deliver_packet(matroska, pkt)) {
4306	2/2 ✓ Branch 0 taken 383 times. ✓ Branch 1 taken 30341 times.	30724	if (matroska->done)
4307	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 373 times.	383	return (ret < 0) ? ret : AVERROR_EOF;
4308	4/4 ✓ Branch 1 taken 344 times. ✓ Branch 2 taken 29997 times. ✓ Branch 3 taken 13 times. ✓ Branch 4 taken 331 times.	30341	if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
4309		13	ret = matroska_resync(matroska, matroska->resync_pos);
4310			}
4311
4312		29484	return 0;
4313			}
4314
4315		55	static int matroska_read_seek(AVFormatContext *s, int stream_index,
4316			int64_t timestamp, int flags)
4317			{
4318		55	MatroskaDemuxContext *matroska = s->priv_data;
4319		55	MatroskaTrack *tracks = NULL;
4320		55	AVStream *st = s->streams[stream_index];
4321		55	FFStream *const sti = ffstream(st);
4322			int i, index;
4323
4324			/* Parse the CUES now since we need the index data to seek. */
4325	2/2 ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 52 times.	55	if (matroska->cues_parsing_deferred > 0) {
4326		3	matroska->cues_parsing_deferred = 0;
4327		3	matroska_parse_cues(matroska);
4328			}
4329
4330	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 55 times.	55	if (!sti->nb_index_entries)
4331		✗	goto err;
4332		55	timestamp = FFMAX(timestamp, sti->index_entries[0].timestamp);
4333
4334	2/2 ✓ Branch 1 taken 45 times. ✓ Branch 2 taken 10 times.	55	if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4335	2/2 ✓ Branch 0 taken 17 times. ✓ Branch 1 taken 28 times.	45	index == sti->nb_index_entries - 1) {
4336		27	matroska_reset_status(matroska, 0, sti->index_entries[sti->nb_index_entries - 1].pos);
4337	2/2 ✓ Branch 1 taken 285 times. ✓ Branch 2 taken 410 times.	695	while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 ||
4338	2/2 ✓ Branch 0 taken 409 times. ✓ Branch 1 taken 1 times.	410	index == sti->nb_index_entries - 1) {
4339		694	matroska_clear_queue(matroska);
4340	2/2 ✓ Branch 1 taken 26 times. ✓ Branch 2 taken 668 times.	694	if (matroska_parse_cluster(matroska) < 0)
4341		26	break;
4342			}
4343			}
4344
4345		55	matroska_clear_queue(matroska);
4346	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 &&
4347	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	index == sti->nb_index_entries - 1))
4348		10	goto err;
4349
4350		45	tracks = matroska->tracks.elem;
4351	2/2 ✓ Branch 0 taken 69 times. ✓ Branch 1 taken 45 times.	114	for (i = 0; i < matroska->tracks.nb_elem; i++) {
4352		69	tracks[i].audio.pkt_cnt = 0;
4353		69	tracks[i].audio.sub_packet_cnt = 0;
4354		69	tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
4355		69	tracks[i].end_timecode = 0;
4356			}
4357
4358			/* We seek to a level 1 element, so set the appropriate status. */
4359		45	matroska_reset_status(matroska, 0, sti->index_entries[index].pos);
4360	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 45 times.	45	if (flags & AVSEEK_FLAG_ANY) {
4361		✗	sti->skip_to_keyframe = 0;
4362		✗	matroska->skip_to_timecode = timestamp;
4363			} else {
4364		45	sti->skip_to_keyframe = 1;
4365		45	matroska->skip_to_timecode = sti->index_entries[index].timestamp;
4366			}
4367		45	matroska->skip_to_keyframe = 1;
4368		45	matroska->done = 0;
4369		45	avpriv_update_cur_dts(s, st, sti->index_entries[index].timestamp);
4370		45	return 0;
4371		10	err:
4372			// slightly hackish but allows proper fallback to
4373			// the generic seeking code.
4374		10	matroska_reset_status(matroska, 0, -1);
4375		10	matroska->resync_pos = -1;
4376		10	matroska_clear_queue(matroska);
4377		10	sti->skip_to_keyframe =
4378		10	matroska->skip_to_keyframe = 0;
4379		10	matroska->done = 0;
4380		10	return -1;
4381			}
4382
4383		370	static int matroska_read_close(AVFormatContext *s)
4384			{
4385		370	MatroskaDemuxContext *matroska = s->priv_data;
4386		370	MatroskaTrack *tracks = matroska->tracks.elem;
4387			int n;
4388
4389		370	matroska_clear_queue(matroska);
4390
4391	2/2 ✓ Branch 0 taken 441 times. ✓ Branch 1 taken 370 times.	811	for (n = 0; n < matroska->tracks.nb_elem; n++)
4392	2/2 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 357 times.	441	if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
4393		84	av_freep(&tracks[n].audio.buf);
4394		370	ebml_free(matroska_segment, matroska);
4395
4396		370	return 0;
4397			}
4398
4399			#if CONFIG_WEBM_DASH_MANIFEST_DEMUXER
4400			typedef struct {
4401			int64_t start_time_ns;
4402			int64_t end_time_ns;
4403			int64_t start_offset;
4404			int64_t end_offset;
4405			} CueDesc;
4406
4407			/* This function searches all the Cues and returns the CueDesc corresponding to
4408			* the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
4409			* end_time_ns. All 4 fields will be set to -1 if ts >= file's duration or
4410			* if an error occurred.
4411			*/
4412		4051	static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
4413		4051	MatroskaDemuxContext *matroska = s->priv_data;
4414		4051	FFStream *const sti = ffstream(s->streams[0]);
4415		4051	AVIndexEntry *const index_entries = sti->index_entries;
4416		4051	int nb_index_entries = sti->nb_index_entries;
4417			CueDesc cue_desc;
4418			int i;
4419
4420	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 3950 times.	4051	if (ts >= (int64_t)(matroska->duration * matroska->time_scale))
4421		101	return (CueDesc) {-1, -1, -1, -1};
4422	2/2 ✓ Branch 0 taken 45235 times. ✓ Branch 1 taken 156 times.	45391	for (i = 1; i < nb_index_entries; i++) {
4423	1/2 ✓ Branch 0 taken 45235 times. ✗ Branch 1 not taken.	45235	if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
4424	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 41441 times.	45235	index_entries[i].timestamp * matroska->time_scale > ts) {
4425		3794	break;
4426			}
4427			}
4428		3950	--i;
4429	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3950 times.	3950	if (index_entries[i].timestamp > matroska->duration)
4430		✗	return (CueDesc) {-1, -1, -1, -1};
4431		3950	cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
4432		3950	cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
4433	2/2 ✓ Branch 0 taken 3794 times. ✓ Branch 1 taken 156 times.	3950	if (i != nb_index_entries - 1) {
4434		3794	cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
4435		3794	cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
4436			} else {
4437		156	cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
4438			// FIXME: this needs special handling for files where Cues appear
4439			// before Clusters. the current logic assumes Cues appear after
4440			// Clusters.
4441		156	cue_desc.end_offset = cues_start - matroska->segment_start;
4442			}
4443		3950	return cue_desc;
4444			}
4445
4446		10	static int webm_clusters_start_with_keyframe(AVFormatContext *s)
4447			{
4448		10	MatroskaDemuxContext *matroska = s->priv_data;
4449		10	AVStream *const st = s->streams[0];
4450		10	FFStream *const sti = ffstream(st);
4451		10	uint32_t id = matroska->current_id;
4452			int64_t cluster_pos, before_pos;
4453		10	int index, rv = 1;
4454
4455	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (sti->nb_index_entries <= 0)
4456		✗	return 0;
4457
4458			// seek to the first cluster using cues.
4459		10	index = av_index_search_timestamp(st, 0, 0);
4460	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times.	10	if (index < 0)
4461		✗	return 0;
4462		10	cluster_pos = sti->index_entries[index].pos;
4463		10	before_pos = avio_tell(s->pb);
4464		78	while (1) {
4465			uint64_t cluster_id, cluster_length;
4466			int read;
4467			AVPacket *pkt;
4468		88	avio_seek(s->pb, cluster_pos, SEEK_SET);
4469			// read cluster id and length
4470		88	read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
4471	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
4472			break;
4473		79	read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
4474	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 79 times.	79	if (read < 0)
4475		✗	break;
4476
4477		79	matroska_reset_status(matroska, 0, cluster_pos);
4478		79	matroska_clear_queue(matroska);
4479	1/2 ✓ Branch 1 taken 79 times. ✗ Branch 2 not taken.	79	if (matroska_parse_cluster(matroska) < 0 ||
4480	1/2 ✓ Branch 0 taken 79 times. ✗ Branch 1 not taken.	79	!matroska->queue.head) {
4481			break;
4482			}
4483		79	pkt = &matroska->queue.head->pkt;
4484			// 4 + read is the length of the cluster id and the cluster length field.
4485		79	cluster_pos += 4 + read + cluster_length;
4486	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 78 times.	79	if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
4487		1	rv = 0;
4488		1	break;
4489			}
4490			}
4491
4492			/* Restore the status after matroska_read_header: */
4493		10	matroska_reset_status(matroska, id, before_pos);
4494
4495		10	return rv;
4496			}
4497
4498		555	static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
4499			double min_buffer, double* buffer,
4500			double* sec_to_download, AVFormatContext *s,
4501			int64_t cues_start)
4502			{
4503		555	double nano_seconds_per_second = 1000000000.0;
4504		555	double time_sec = time_ns / nano_seconds_per_second;
4505		555	int rv = 0;
4506		555	int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
4507		555	int64_t end_time_ns = time_ns + time_to_search_ns;
4508		555	double sec_downloaded = 0.0;
4509		555	CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
4510	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 555 times.	555	if (desc_curr.start_time_ns == -1)
4511		✗	return -1;
4512		555	*sec_to_download = 0.0;
4513
4514			// Check for non cue start time.
4515	2/2 ✓ Branch 0 taken 513 times. ✓ Branch 1 taken 42 times.	555	if (time_ns > desc_curr.start_time_ns) {
4516		513	int64_t cue_nano = desc_curr.end_time_ns - time_ns;
4517		513	double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
4518		513	double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
4519		513	double timeToDownload = (cueBytes * 8.0) / bps;
4520
4521		513	sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
4522		513	*sec_to_download += timeToDownload;
4523
4524			// Check if the search ends within the first cue.
4525	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 513 times.	513	if (desc_curr.end_time_ns >= end_time_ns) {
4526		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4527		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4528		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4529		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4530			}
4531
4532	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 509 times.	513	if ((sec_downloaded + *buffer) <= min_buffer) {
4533		4	return 1;
4534			}
4535
4536			// Get the next Cue.
4537		509	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4538			}
4539
4540	2/2 ✓ Branch 0 taken 2856 times. ✓ Branch 1 taken 100 times.	2956	while (desc_curr.start_time_ns != -1) {
4541		2856	int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
4542		2856	int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
4543		2856	double desc_sec = desc_ns / nano_seconds_per_second;
4544		2856	double bits = (desc_bytes * 8.0);
4545		2856	double time_to_download = bits / bps;
4546
4547		2856	sec_downloaded += desc_sec - time_to_download;
4548		2856	*sec_to_download += time_to_download;
4549
4550	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2856 times.	2856	if (desc_curr.end_time_ns >= end_time_ns) {
4551		✗	double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4552		✗	double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4553		✗	sec_downloaded = percent_to_sub * sec_downloaded;
4554		✗	*sec_to_download = percent_to_sub * *sec_to_download;
4555
4556		✗	if ((sec_downloaded + *buffer) <= min_buffer)
4557		✗	rv = 1;
4558		✗	break;
4559			}
4560
4561	2/2 ✓ Branch 0 taken 451 times. ✓ Branch 1 taken 2405 times.	2856	if ((sec_downloaded + *buffer) <= min_buffer) {
4562		451	rv = 1;
4563		451	break;
4564			}
4565
4566		2405	desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4567			}
4568		551	*buffer = *buffer + sec_downloaded;
4569		551	return rv;
4570			}
4571
4572			/* This function computes the bandwidth of the WebM file with the help of
4573			* buffer_size_after_time_downloaded() function. Both of these functions are
4574			* adapted from WebM Tools project and are adapted to work with FFmpeg's
4575			* Matroska parsing mechanism.
4576			*
4577			* Returns the bandwidth of the file on success; -1 on error.
4578			* */
4579		10	static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4580			{
4581		10	MatroskaDemuxContext *matroska = s->priv_data;
4582		10	AVStream *st = s->streams[0];
4583		10	FFStream *const sti = ffstream(st);
4584		10	double bandwidth = 0.0;
4585
4586	2/2 ✓ Branch 0 taken 101 times. ✓ Branch 1 taken 10 times.	111	for (int i = 0; i < sti->nb_index_entries; i++) {
4587		101	int64_t prebuffer_ns = 1000000000;
4588		101	int64_t time_ns = sti->index_entries[i].timestamp * matroska->time_scale;
4589		101	double nano_seconds_per_second = 1000000000.0;
4590			int64_t prebuffered_ns;
4591		101	double prebuffer_bytes = 0.0;
4592		101	int64_t temp_prebuffer_ns = prebuffer_ns;
4593			int64_t pre_bytes, pre_ns;
4594			double pre_sec, prebuffer, bits_per_second;
4595		101	CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4596			// Start with the first Cue.
4597		101	CueDesc desc_end = desc_beg;
4598
4599	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 101 times.	101	if (time_ns > INT64_MAX - prebuffer_ns)
4600		✗	return -1;
4601		101	prebuffered_ns = time_ns + prebuffer_ns;
4602
4603			// Figure out how much data we have downloaded for the prebuffer. This will
4604			// be used later to adjust the bits per sample to try.
4605	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) {
4606			// Prebuffered the entire Cue.
4607		21	prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4608		21	temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4609		21	desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4610			}
4611	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 100 times.	101	if (desc_end.start_time_ns == -1) {
4612			// The prebuffer is larger than the duration.
4613	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4614		✗	return -1;
4615		1	bits_per_second = 0.0;
4616			} else {
4617			// The prebuffer ends in the last Cue. Estimate how much data was
4618			// prebuffered.
4619		100	pre_bytes = desc_end.end_offset - desc_end.start_offset;
4620	1/2 ✓ Branch 0 taken 100 times. ✗ Branch 1 not taken.	100	if (desc_end.end_time_ns <= desc_end.start_time_ns ||
4621	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 100 times.	100	desc_end.end_time_ns - (uint64_t)desc_end.start_time_ns > INT64_MAX)
4622		✗	return -1;
4623		100	pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
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