summaryrefslogtreecommitdiff
path: root/ffmpeg/libavformat/matroskadec.c
diff options
context:
space:
mode:
authorTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
committerTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
commit22e28216336da876e1fd17f380ce42eaf1446769 (patch)
tree444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/libavformat/matroskadec.c
parentae5e8541f6e06e64c28719467cdf366ac57aff31 (diff)
chasing indexing error
Diffstat (limited to 'ffmpeg/libavformat/matroskadec.c')
-rw-r--r--ffmpeg/libavformat/matroskadec.c2889
1 files changed, 0 insertions, 2889 deletions
diff --git a/ffmpeg/libavformat/matroskadec.c b/ffmpeg/libavformat/matroskadec.c
deleted file mode 100644
index e994786..0000000
--- a/ffmpeg/libavformat/matroskadec.c
+++ /dev/null
@@ -1,2889 +0,0 @@
-/*
- * Matroska file demuxer
- * Copyright (c) 2003-2008 The FFmpeg Project
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Matroska file demuxer
- * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
- * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
- * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
- * @see specs available on the Matroska project page: http://www.matroska.org/
- */
-
-#include <stdio.h>
-#include "avformat.h"
-#include "internal.h"
-#include "avio_internal.h"
-/* For ff_codec_get_id(). */
-#include "riff.h"
-#include "isom.h"
-#include "rmsipr.h"
-#include "matroska.h"
-#include "libavcodec/bytestream.h"
-#include "libavcodec/mpeg4audio.h"
-#include "libavutil/base64.h"
-#include "libavutil/intfloat.h"
-#include "libavutil/intreadwrite.h"
-#include "libavutil/avstring.h"
-#include "libavutil/lzo.h"
-#include "libavutil/dict.h"
-#if CONFIG_ZLIB
-#include <zlib.h>
-#endif
-#if CONFIG_BZLIB
-#include <bzlib.h>
-#endif
-
-typedef enum {
- EBML_NONE,
- EBML_UINT,
- EBML_FLOAT,
- EBML_STR,
- EBML_UTF8,
- EBML_BIN,
- EBML_NEST,
- EBML_PASS,
- EBML_STOP,
- EBML_SINT,
- EBML_TYPE_COUNT
-} EbmlType;
-
-typedef const struct EbmlSyntax {
- uint32_t id;
- EbmlType type;
- int list_elem_size;
- int data_offset;
- union {
- uint64_t u;
- double f;
- const char *s;
- const struct EbmlSyntax *n;
- } def;
-} EbmlSyntax;
-
-typedef struct {
- int nb_elem;
- void *elem;
-} EbmlList;
-
-typedef struct {
- int size;
- uint8_t *data;
- int64_t pos;
-} EbmlBin;
-
-typedef struct {
- uint64_t version;
- uint64_t max_size;
- uint64_t id_length;
- char *doctype;
- uint64_t doctype_version;
-} Ebml;
-
-typedef struct {
- uint64_t algo;
- EbmlBin settings;
-} MatroskaTrackCompression;
-
-typedef struct {
- uint64_t algo;
- EbmlBin key_id;
-} MatroskaTrackEncryption;
-
-typedef struct {
- uint64_t scope;
- uint64_t type;
- MatroskaTrackCompression compression;
- MatroskaTrackEncryption encryption;
-} MatroskaTrackEncoding;
-
-typedef struct {
- double frame_rate;
- uint64_t display_width;
- uint64_t display_height;
- uint64_t pixel_width;
- uint64_t pixel_height;
- EbmlBin color_space;
- uint64_t stereo_mode;
- uint64_t alpha_mode;
-} MatroskaTrackVideo;
-
-typedef struct {
- double samplerate;
- double out_samplerate;
- uint64_t bitdepth;
- uint64_t channels;
-
- /* real audio header (extracted from extradata) */
- int coded_framesize;
- int sub_packet_h;
- int frame_size;
- int sub_packet_size;
- int sub_packet_cnt;
- int pkt_cnt;
- uint64_t buf_timecode;
- uint8_t *buf;
-} MatroskaTrackAudio;
-
-typedef struct {
- uint64_t uid;
- uint64_t type;
-} MatroskaTrackPlane;
-
-typedef struct {
- EbmlList combine_planes;
-} MatroskaTrackOperation;
-
-typedef struct {
- uint64_t num;
- uint64_t uid;
- uint64_t type;
- char *name;
- char *codec_id;
- EbmlBin codec_priv;
- char *language;
- double time_scale;
- uint64_t default_duration;
- uint64_t flag_default;
- uint64_t flag_forced;
- uint64_t codec_delay;
- uint64_t seek_preroll;
- MatroskaTrackVideo video;
- MatroskaTrackAudio audio;
- MatroskaTrackOperation operation;
- EbmlList encodings;
-
- AVStream *stream;
- int64_t end_timecode;
- int ms_compat;
- uint64_t max_block_additional_id;
-} MatroskaTrack;
-
-typedef struct {
- uint64_t uid;
- char *filename;
- char *mime;
- EbmlBin bin;
-
- AVStream *stream;
-} MatroskaAttachement;
-
-typedef struct {
- uint64_t start;
- uint64_t end;
- uint64_t uid;
- char *title;
-
- AVChapter *chapter;
-} MatroskaChapter;
-
-typedef struct {
- uint64_t track;
- uint64_t pos;
-} MatroskaIndexPos;
-
-typedef struct {
- uint64_t time;
- EbmlList pos;
-} MatroskaIndex;
-
-typedef struct {
- char *name;
- char *string;
- char *lang;
- uint64_t def;
- EbmlList sub;
-} MatroskaTag;
-
-typedef struct {
- char *type;
- uint64_t typevalue;
- uint64_t trackuid;
- uint64_t chapteruid;
- uint64_t attachuid;
-} MatroskaTagTarget;
-
-typedef struct {
- MatroskaTagTarget target;
- EbmlList tag;
-} MatroskaTags;
-
-typedef struct {
- uint64_t id;
- uint64_t pos;
-} MatroskaSeekhead;
-
-typedef struct {
- uint64_t start;
- uint64_t length;
-} MatroskaLevel;
-
-typedef struct {
- uint64_t timecode;
- EbmlList blocks;
-} MatroskaCluster;
-
-typedef struct {
- AVFormatContext *ctx;
-
- /* EBML stuff */
- int num_levels;
- MatroskaLevel levels[EBML_MAX_DEPTH];
- int level_up;
- uint32_t current_id;
-
- uint64_t time_scale;
- double duration;
- char *title;
- EbmlBin date_utc;
- EbmlList tracks;
- EbmlList attachments;
- EbmlList chapters;
- EbmlList index;
- EbmlList tags;
- EbmlList seekhead;
-
- /* byte position of the segment inside the stream */
- int64_t segment_start;
-
- /* the packet queue */
- AVPacket **packets;
- int num_packets;
- AVPacket *prev_pkt;
-
- int done;
-
- /* What to skip before effectively reading a packet. */
- int skip_to_keyframe;
- uint64_t skip_to_timecode;
-
- /* File has a CUES element, but we defer parsing until it is needed. */
- int cues_parsing_deferred;
-
- int current_cluster_num_blocks;
- int64_t current_cluster_pos;
- MatroskaCluster current_cluster;
-
- /* File has SSA subtitles which prevent incremental cluster parsing. */
- int contains_ssa;
-} MatroskaDemuxContext;
-
-typedef struct {
- uint64_t duration;
- int64_t reference;
- uint64_t non_simple;
- EbmlBin bin;
- uint64_t additional_id;
- EbmlBin additional;
- int64_t discard_padding;
-} MatroskaBlock;
-
-static EbmlSyntax ebml_header[] = {
- { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
- { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
- { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
- { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
- { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
- { EBML_ID_EBMLVERSION, EBML_NONE },
- { EBML_ID_DOCTYPEVERSION, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax ebml_syntax[] = {
- { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
- { 0 }
-};
-
-static EbmlSyntax matroska_info[] = {
- { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
- { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
- { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
- { MATROSKA_ID_WRITINGAPP, EBML_NONE },
- { MATROSKA_ID_MUXINGAPP, EBML_NONE },
- { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext,date_utc) },
- { MATROSKA_ID_SEGMENTUID, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_video[] = {
- { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
- { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width), {.u=-1} },
- { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height), {.u=-1} },
- { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
- { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
- { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo,color_space) },
- { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,stereo_mode) },
- { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,alpha_mode) },
- { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
- { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
- { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
- { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
- { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
- { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
- { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_audio[] = {
- { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
- { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
- { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
- { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_encoding_compression[] = {
- { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
- { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_encoding_encryption[] = {
- { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u=0} },
- { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
- { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
- { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
- { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
- { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
- { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
- { 0 }
-};
-static EbmlSyntax matroska_track_encoding[] = {
- { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
- { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
- { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
- { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding,encryption), {.n=matroska_track_encoding_encryption} },
- { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_encodings[] = {
- { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_plane[] = {
- { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
- { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_combine_planes[] = {
- { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n=matroska_track_plane} },
- { 0 }
-};
-
-static EbmlSyntax matroska_track_operation[] = {
- { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n=matroska_track_combine_planes} },
- { 0 }
-};
-
-static EbmlSyntax matroska_track[] = {
- { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
- { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
- { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
- { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
- { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
- { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
- { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
- { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
- { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
- { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
- { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
- { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
- { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
- { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack,operation), {.n=matroska_track_operation} },
- { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
- { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack,max_block_additional_id) },
- { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack,codec_delay) },
- { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack,seek_preroll) },
- { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
- { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
- { MATROSKA_ID_CODECNAME, EBML_NONE },
- { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
- { MATROSKA_ID_CODECINFOURL, EBML_NONE },
- { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
- { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
- { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_tracks[] = {
- { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
- { 0 }
-};
-
-static EbmlSyntax matroska_attachment[] = {
- { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
- { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
- { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
- { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
- { MATROSKA_ID_FILEDESC, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_attachments[] = {
- { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
- { 0 }
-};
-
-static EbmlSyntax matroska_chapter_display[] = {
- { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
- { MATROSKA_ID_CHAPLANG, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_chapter_entry[] = {
- { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
- { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
- { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
- { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
- { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
- { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
- { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
- { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_chapter[] = {
- { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
- { MATROSKA_ID_EDITIONUID, EBML_NONE },
- { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
- { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
- { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_chapters[] = {
- { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
- { 0 }
-};
-
-static EbmlSyntax matroska_index_pos[] = {
- { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
- { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
- { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
- { MATROSKA_ID_CUEDURATION, EBML_NONE },
- { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_index_entry[] = {
- { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
- { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
- { 0 }
-};
-
-static EbmlSyntax matroska_index[] = {
- { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
- { 0 }
-};
-
-static EbmlSyntax matroska_simpletag[] = {
- { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
- { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
- { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
- { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
- { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
- { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
- { 0 }
-};
-
-static EbmlSyntax matroska_tagtargets[] = {
- { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
- { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
- { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
- { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
- { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
- { 0 }
-};
-
-static EbmlSyntax matroska_tag[] = {
- { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
- { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
- { 0 }
-};
-
-static EbmlSyntax matroska_tags[] = {
- { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
- { 0 }
-};
-
-static EbmlSyntax matroska_seekhead_entry[] = {
- { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
- { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
- { 0 }
-};
-
-static EbmlSyntax matroska_seekhead[] = {
- { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
- { 0 }
-};
-
-static EbmlSyntax matroska_segment[] = {
- { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
- { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
- { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
- { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
- { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
- { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
- { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
- { MATROSKA_ID_CLUSTER, EBML_STOP },
- { 0 }
-};
-
-static EbmlSyntax matroska_segments[] = {
- { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
- { 0 }
-};
-
-static EbmlSyntax matroska_blockmore[] = {
- { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
- { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
- { 0 }
-};
-
-static EbmlSyntax matroska_blockadditions[] = {
- { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n=matroska_blockmore} },
- { 0 }
-};
-
-static EbmlSyntax matroska_blockgroup[] = {
- { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
- { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, {.n=matroska_blockadditions} },
- { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
- { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration) },
- { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock,discard_padding) },
- { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock,reference) },
- { MATROSKA_ID_CODECSTATE, EBML_NONE },
- { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
- { 0 }
-};
-
-static EbmlSyntax matroska_cluster[] = {
- { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
- { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
- { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
- { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
- { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_clusters[] = {
- { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
- { MATROSKA_ID_INFO, EBML_NONE },
- { MATROSKA_ID_CUES, EBML_NONE },
- { MATROSKA_ID_TAGS, EBML_NONE },
- { MATROSKA_ID_SEEKHEAD, EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_cluster_incremental_parsing[] = {
- { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
- { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
- { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
- { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
- { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
- { MATROSKA_ID_INFO, EBML_NONE },
- { MATROSKA_ID_CUES, EBML_NONE },
- { MATROSKA_ID_TAGS, EBML_NONE },
- { MATROSKA_ID_SEEKHEAD, EBML_NONE },
- { MATROSKA_ID_CLUSTER, EBML_STOP },
- { 0 }
-};
-
-static EbmlSyntax matroska_cluster_incremental[] = {
- { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
- { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
- { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
- { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
- { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
- { 0 }
-};
-
-static EbmlSyntax matroska_clusters_incremental[] = {
- { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
- { MATROSKA_ID_INFO, EBML_NONE },
- { MATROSKA_ID_CUES, EBML_NONE },
- { MATROSKA_ID_TAGS, EBML_NONE },
- { MATROSKA_ID_SEEKHEAD, EBML_NONE },
- { 0 }
-};
-
-static const char *const matroska_doctypes[] = { "matroska", "webm" };
-
-static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
-{
- AVIOContext *pb = matroska->ctx->pb;
- uint32_t id;
- matroska->current_id = 0;
- matroska->num_levels = 0;
-
- /* seek to next position to resync from */
- if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
- goto eof;
-
- id = avio_rb32(pb);
-
- // try to find a toplevel element
- while (!url_feof(pb)) {
- if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
- id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
- id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
- id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
- matroska->current_id = id;
- return 0;
- }
- id = (id << 8) | avio_r8(pb);
- }
-eof:
- matroska->done = 1;
- return AVERROR_EOF;
-}
-
-/*
- * Return: Whether we reached the end of a level in the hierarchy or not.
- */
-static int ebml_level_end(MatroskaDemuxContext *matroska)
-{
- AVIOContext *pb = matroska->ctx->pb;
- int64_t pos = avio_tell(pb);
-
- if (matroska->num_levels > 0) {
- MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
- if (pos - level->start >= level->length || matroska->current_id) {
- matroska->num_levels--;
- return 1;
- }
- }
- return 0;
-}
-
-/*
- * Read: an "EBML number", which is defined as a variable-length
- * array of bytes. The first byte indicates the length by giving a
- * number of 0-bits followed by a one. The position of the first
- * "one" bit inside the first byte indicates the length of this
- * number.
- * Returns: number of bytes read, < 0 on error
- */
-static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
- int max_size, uint64_t *number)
-{
- int read = 1, n = 1;
- uint64_t total = 0;
-
- /* The first byte tells us the length in bytes - avio_r8() can normally
- * return 0, but since that's not a valid first ebmlID byte, we can
- * use it safely here to catch EOS. */
- if (!(total = avio_r8(pb))) {
- /* we might encounter EOS here */
- if (!url_feof(pb)) {
- int64_t pos = avio_tell(pb);
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
- pos, pos);
- return pb->error ? pb->error : AVERROR(EIO);
- }
- return AVERROR_EOF;
- }
-
- /* get the length of the EBML number */
- read = 8 - ff_log2_tab[total];
- if (read > max_size) {
- int64_t pos = avio_tell(pb) - 1;
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
- (uint8_t) total, pos, pos);
- return AVERROR_INVALIDDATA;
- }
-
- /* read out length */
- total ^= 1 << ff_log2_tab[total];
- while (n++ < read)
- total = (total << 8) | avio_r8(pb);
-
- *number = total;
-
- return read;
-}
-
-/**
- * Read a EBML length value.
- * This needs special handling for the "unknown length" case which has multiple
- * encodings.
- */
-static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
- uint64_t *number)
-{
- int res = ebml_read_num(matroska, pb, 8, number);
- if (res > 0 && *number + 1 == 1ULL << (7 * res))
- *number = 0xffffffffffffffULL;
- return res;
-}
-
-/*
- * Read the next element as an unsigned int.
- * 0 is success, < 0 is failure.
- */
-static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
-{
- int n = 0;
-
- if (size > 8)
- return AVERROR_INVALIDDATA;
-
- /* big-endian ordering; build up number */
- *num = 0;
- while (n++ < size)
- *num = (*num << 8) | avio_r8(pb);
-
- return 0;
-}
-
-/*
- * Read the next element as a signed int.
- * 0 is success, < 0 is failure.
- */
-static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
-{
- int n = 1;
-
- if (size > 8)
- return AVERROR_INVALIDDATA;
-
- if (size == 0) {
- *num = 0;
- } else {
- *num = sign_extend(avio_r8(pb), 8);
-
- /* big-endian ordering; build up number */
- while (n++ < size)
- *num = (*num << 8) | avio_r8(pb);
- }
-
- return 0;
-}
-
-/*
- * Read the next element as a float.
- * 0 is success, < 0 is failure.
- */
-static int ebml_read_float(AVIOContext *pb, int size, double *num)
-{
- if (size == 0) {
- *num = 0;
- } else if (size == 4) {
- *num = av_int2float(avio_rb32(pb));
- } else if (size == 8){
- *num = av_int2double(avio_rb64(pb));
- } else
- return AVERROR_INVALIDDATA;
-
- return 0;
-}
-
-/*
- * Read the next element as an ASCII string.
- * 0 is success, < 0 is failure.
- */
-static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
-{
- char *res;
-
- /* EBML strings are usually not 0-terminated, so we allocate one
- * byte more, read the string and NULL-terminate it ourselves. */
- if (!(res = av_malloc(size + 1)))
- return AVERROR(ENOMEM);
- if (avio_read(pb, (uint8_t *) res, size) != size) {
- av_free(res);
- return AVERROR(EIO);
- }
- (res)[size] = '\0';
- av_free(*str);
- *str = res;
-
- return 0;
-}
-
-/*
- * Read the next element as binary data.
- * 0 is success, < 0 is failure.
- */
-static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
-{
- av_fast_padded_malloc(&bin->data, &bin->size, length);
- if (!bin->data)
- return AVERROR(ENOMEM);
-
- bin->size = length;
- bin->pos = avio_tell(pb);
- if (avio_read(pb, bin->data, length) != length) {
- av_freep(&bin->data);
- bin->size = 0;
- return AVERROR(EIO);
- }
-
- return 0;
-}
-
-/*
- * Read the next element, but only the header. The contents
- * are supposed to be sub-elements which can be read separately.
- * 0 is success, < 0 is failure.
- */
-static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
-{
- AVIOContext *pb = matroska->ctx->pb;
- MatroskaLevel *level;
-
- if (matroska->num_levels >= EBML_MAX_DEPTH) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
- return AVERROR(ENOSYS);
- }
-
- level = &matroska->levels[matroska->num_levels++];
- level->start = avio_tell(pb);
- level->length = length;
-
- return 0;
-}
-
-/*
- * Read signed/unsigned "EBML" numbers.
- * Return: number of bytes processed, < 0 on error
- */
-static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
- uint8_t *data, uint32_t size, uint64_t *num)
-{
- AVIOContext pb;
- ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
- return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
-}
-
-/*
- * Same as above, but signed.
- */
-static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
- uint8_t *data, uint32_t size, int64_t *num)
-{
- uint64_t unum;
- int res;
-
- /* read as unsigned number first */
- if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
- return res;
-
- /* make signed (weird way) */
- *num = unum - ((1LL << (7*res - 1)) - 1);
-
- return res;
-}
-
-static int ebml_parse_elem(MatroskaDemuxContext *matroska,
- EbmlSyntax *syntax, void *data);
-
-static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
- uint32_t id, void *data)
-{
- int i;
- for (i=0; syntax[i].id; i++)
- if (id == syntax[i].id)
- break;
- if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
- matroska->num_levels > 0 &&
- matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
- return 0; // we reached the end of an unknown size cluster
- if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
- av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
- if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
- return AVERROR_INVALIDDATA;
- }
- return ebml_parse_elem(matroska, &syntax[i], data);
-}
-
-static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
- void *data)
-{
- if (!matroska->current_id) {
- uint64_t id;
- int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
- if (res < 0)
- return res;
- matroska->current_id = id | 1 << 7*res;
- }
- return ebml_parse_id(matroska, syntax, matroska->current_id, data);
-}
-
-static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
- void *data)
-{
- int i, res = 0;
-
- for (i=0; syntax[i].id; i++)
- switch (syntax[i].type) {
- case EBML_UINT:
- *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
- break;
- case EBML_FLOAT:
- *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
- break;
- case EBML_STR:
- case EBML_UTF8:
- // the default may be NULL
- if (syntax[i].def.s) {
- uint8_t **dst = (uint8_t**)((uint8_t*)data + syntax[i].data_offset);
- *dst = av_strdup(syntax[i].def.s);
- if (!*dst)
- return AVERROR(ENOMEM);
- }
- break;
- }
-
- while (!res && !ebml_level_end(matroska))
- res = ebml_parse(matroska, syntax, data);
-
- return res;
-}
-
-static int ebml_parse_elem(MatroskaDemuxContext *matroska,
- EbmlSyntax *syntax, void *data)
-{
- static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
- [EBML_UINT] = 8,
- [EBML_FLOAT] = 8,
- // max. 16 MB for strings
- [EBML_STR] = 0x1000000,
- [EBML_UTF8] = 0x1000000,
- // max. 256 MB for binary data
- [EBML_BIN] = 0x10000000,
- // no limits for anything else
- };
- AVIOContext *pb = matroska->ctx->pb;
- uint32_t id = syntax->id;
- uint64_t length;
- int res;
- void *newelem;
-
- data = (char *)data + syntax->data_offset;
- if (syntax->list_elem_size) {
- EbmlList *list = data;
- newelem = av_realloc_array(list->elem, list->nb_elem+1, syntax->list_elem_size);
- if (!newelem)
- return AVERROR(ENOMEM);
- list->elem = newelem;
- data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
- memset(data, 0, syntax->list_elem_size);
- list->nb_elem++;
- }
-
- if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
- matroska->current_id = 0;
- if ((res = ebml_read_length(matroska, pb, &length)) < 0)
- return res;
- if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
- length, max_lengths[syntax->type], syntax->type);
- return AVERROR_INVALIDDATA;
- }
- }
-
- switch (syntax->type) {
- case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
- case EBML_SINT: res = ebml_read_sint (pb, length, data); break;
- case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
- case EBML_STR:
- case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
- case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
- case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
- return res;
- if (id == MATROSKA_ID_SEGMENT)
- matroska->segment_start = avio_tell(matroska->ctx->pb);
- return ebml_parse_nest(matroska, syntax->def.n, data);
- case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
- case EBML_STOP: return 1;
- default:
- if(ffio_limit(pb, length) != length)
- return AVERROR(EIO);
- return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
- }
- if (res == AVERROR_INVALIDDATA)
- av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
- else if (res == AVERROR(EIO))
- av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
- return res;
-}
-
-static void ebml_free(EbmlSyntax *syntax, void *data)
-{
- int i, j;
- for (i=0; syntax[i].id; i++) {
- void *data_off = (char *)data + syntax[i].data_offset;
- switch (syntax[i].type) {
- case EBML_STR:
- case EBML_UTF8: av_freep(data_off); break;
- case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
- case EBML_NEST:
- if (syntax[i].list_elem_size) {
- EbmlList *list = data_off;
- char *ptr = list->elem;
- for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
- ebml_free(syntax[i].def.n, ptr);
- av_free(list->elem);
- } else
- ebml_free(syntax[i].def.n, data_off);
- default: break;
- }
- }
-}
-
-
-/*
- * Autodetecting...
- */
-static int matroska_probe(AVProbeData *p)
-{
- uint64_t total = 0;
- int len_mask = 0x80, size = 1, n = 1, i;
-
- /* EBML header? */
- if (AV_RB32(p->buf) != EBML_ID_HEADER)
- return 0;
-
- /* length of header */
- total = p->buf[4];
- while (size <= 8 && !(total & len_mask)) {
- size++;
- len_mask >>= 1;
- }
- if (size > 8)
- return 0;
- total &= (len_mask - 1);
- while (n < size)
- total = (total << 8) | p->buf[4 + n++];
-
- /* Does the probe data contain the whole header? */
- if (p->buf_size < 4 + size + total)
- return 0;
-
- /* The header should contain a known document type. For now,
- * we don't parse the whole header but simply check for the
- * availability of that array of characters inside the header.
- * Not fully fool-proof, but good enough. */
- for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
- int probelen = strlen(matroska_doctypes[i]);
- if (total < probelen)
- continue;
- for (n = 4+size; n <= 4+size+total-probelen; n++)
- if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
- return AVPROBE_SCORE_MAX;
- }
-
- // probably valid EBML header but no recognized doctype
- return AVPROBE_SCORE_EXTENSION;
-}
-
-static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
- int num)
-{
- MatroskaTrack *tracks = matroska->tracks.elem;
- int i;
-
- for (i=0; i < matroska->tracks.nb_elem; i++)
- if (tracks[i].num == num)
- return &tracks[i];
-
- av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
- return NULL;
-}
-
-static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
- MatroskaTrack *track)
-{
- MatroskaTrackEncoding *encodings = track->encodings.elem;
- uint8_t* data = *buf;
- int isize = *buf_size;
- uint8_t* pkt_data = NULL;
- uint8_t av_unused *newpktdata;
- int pkt_size = isize;
- int result = 0;
- int olen;
-
- if (pkt_size >= 10000000U)
- return AVERROR_INVALIDDATA;
-
- switch (encodings[0].compression.algo) {
- case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: {
- int header_size = encodings[0].compression.settings.size;
- uint8_t *header = encodings[0].compression.settings.data;
-
- if (header_size && !header) {
- av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
- return -1;
- }
-
- if (!header_size)
- return 0;
-
- pkt_size = isize + header_size;
- pkt_data = av_malloc(pkt_size);
- if (!pkt_data)
- return AVERROR(ENOMEM);
-
- memcpy(pkt_data, header, header_size);
- memcpy(pkt_data + header_size, data, isize);
- break;
- }
-#if CONFIG_LZO
- case MATROSKA_TRACK_ENCODING_COMP_LZO:
- do {
- olen = pkt_size *= 3;
- newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
- if (!newpktdata) {
- result = AVERROR(ENOMEM);
- goto failed;
- }
- pkt_data = newpktdata;
- result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
- } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
- if (result) {
- result = AVERROR_INVALIDDATA;
- goto failed;
- }
- pkt_size -= olen;
- break;
-#endif
-#if CONFIG_ZLIB
- case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
- z_stream zstream = {0};
- if (inflateInit(&zstream) != Z_OK)
- return -1;
- zstream.next_in = data;
- zstream.avail_in = isize;
- do {
- pkt_size *= 3;
- newpktdata = av_realloc(pkt_data, pkt_size);
- if (!newpktdata) {
- inflateEnd(&zstream);
- goto failed;
- }
- pkt_data = newpktdata;
- zstream.avail_out = pkt_size - zstream.total_out;
- zstream.next_out = pkt_data + zstream.total_out;
- if (pkt_data) {
- result = inflate(&zstream, Z_NO_FLUSH);
- } else
- result = Z_MEM_ERROR;
- } while (result==Z_OK && pkt_size<10000000);
- pkt_size = zstream.total_out;
- inflateEnd(&zstream);
- if (result != Z_STREAM_END) {
- if (result == Z_MEM_ERROR)
- result = AVERROR(ENOMEM);
- else
- result = AVERROR_INVALIDDATA;
- goto failed;
- }
- break;
- }
-#endif
-#if CONFIG_BZLIB
- case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
- bz_stream bzstream = {0};
- if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
- return -1;
- bzstream.next_in = data;
- bzstream.avail_in = isize;
- do {
- pkt_size *= 3;
- newpktdata = av_realloc(pkt_data, pkt_size);
- if (!newpktdata) {
- BZ2_bzDecompressEnd(&bzstream);
- goto failed;
- }
- pkt_data = newpktdata;
- bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
- bzstream.next_out = pkt_data + bzstream.total_out_lo32;
- if (pkt_data) {
- result = BZ2_bzDecompress(&bzstream);
- } else
- result = BZ_MEM_ERROR;
- } while (result==BZ_OK && pkt_size<10000000);
- pkt_size = bzstream.total_out_lo32;
- BZ2_bzDecompressEnd(&bzstream);
- if (result != BZ_STREAM_END) {
- if (result == BZ_MEM_ERROR)
- result = AVERROR(ENOMEM);
- else
- result = AVERROR_INVALIDDATA;
- goto failed;
- }
- break;
- }
-#endif
- default:
- return AVERROR_INVALIDDATA;
- }
-
- *buf = pkt_data;
- *buf_size = pkt_size;
- return 0;
- failed:
- av_free(pkt_data);
- return result;
-}
-
-#if FF_API_ASS_SSA
-static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
- AVPacket *pkt, uint64_t display_duration)
-{
- AVBufferRef *line;
- char *layer, *ptr = pkt->data, *end = ptr+pkt->size;
- for (; *ptr!=',' && ptr<end-1; ptr++);
- if (*ptr == ',')
- ptr++;
- layer = ptr;
- for (; *ptr!=',' && ptr<end-1; ptr++);
- if (*ptr == ',') {
- int64_t end_pts = pkt->pts + display_duration;
- int sc = matroska->time_scale * pkt->pts / 10000000;
- int ec = matroska->time_scale * end_pts / 10000000;
- int sh, sm, ss, eh, em, es, len;
- sh = sc/360000; sc -= 360000*sh;
- sm = sc/ 6000; sc -= 6000*sm;
- ss = sc/ 100; sc -= 100*ss;
- eh = ec/360000; ec -= 360000*eh;
- em = ec/ 6000; ec -= 6000*em;
- es = ec/ 100; ec -= 100*es;
- *ptr++ = '\0';
- len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
- if (!(line = av_buffer_alloc(len)))
- return;
- snprintf(line->data, len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
- layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
- av_buffer_unref(&pkt->buf);
- pkt->buf = line;
- pkt->data = line->data;
- pkt->size = strlen(line->data);
- }
-}
-
-static int matroska_merge_packets(AVPacket *out, AVPacket *in)
-{
- int ret = av_grow_packet(out, in->size);
- if (ret < 0)
- return ret;
-
- memcpy(out->data + out->size - in->size, in->data, in->size);
-
- av_free_packet(in);
- av_free(in);
- return 0;
-}
-#endif
-
-static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
- AVDictionary **metadata, char *prefix)
-{
- MatroskaTag *tags = list->elem;
- char key[1024];
- int i;
-
- for (i=0; i < list->nb_elem; i++) {
- const char *lang = tags[i].lang && strcmp(tags[i].lang, "und") ?
- tags[i].lang : NULL;
-
- if (!tags[i].name) {
- av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
- continue;
- }
- if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
- else av_strlcpy(key, tags[i].name, sizeof(key));
- if (tags[i].def || !lang) {
- av_dict_set(metadata, key, tags[i].string, 0);
- if (tags[i].sub.nb_elem)
- matroska_convert_tag(s, &tags[i].sub, metadata, key);
- }
- if (lang) {
- av_strlcat(key, "-", sizeof(key));
- av_strlcat(key, lang, sizeof(key));
- av_dict_set(metadata, key, tags[i].string, 0);
- if (tags[i].sub.nb_elem)
- matroska_convert_tag(s, &tags[i].sub, metadata, key);
- }
- }
- ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
-}
-
-static void matroska_convert_tags(AVFormatContext *s)
-{
- MatroskaDemuxContext *matroska = s->priv_data;
- MatroskaTags *tags = matroska->tags.elem;
- int i, j;
-
- for (i=0; i < matroska->tags.nb_elem; i++) {
- if (tags[i].target.attachuid) {
- MatroskaAttachement *attachment = matroska->attachments.elem;
- for (j=0; j<matroska->attachments.nb_elem; j++)
- if (attachment[j].uid == tags[i].target.attachuid
- && attachment[j].stream)
- matroska_convert_tag(s, &tags[i].tag,
- &attachment[j].stream->metadata, NULL);
- } else if (tags[i].target.chapteruid) {
- MatroskaChapter *chapter = matroska->chapters.elem;
- for (j=0; j<matroska->chapters.nb_elem; j++)
- if (chapter[j].uid == tags[i].target.chapteruid
- && chapter[j].chapter)
- matroska_convert_tag(s, &tags[i].tag,
- &chapter[j].chapter->metadata, NULL);
- } else if (tags[i].target.trackuid) {
- MatroskaTrack *track = matroska->tracks.elem;
- for (j=0; j<matroska->tracks.nb_elem; j++)
- if (track[j].uid == tags[i].target.trackuid && track[j].stream)
- matroska_convert_tag(s, &tags[i].tag,
- &track[j].stream->metadata, NULL);
- } else {
- matroska_convert_tag(s, &tags[i].tag, &s->metadata,
- tags[i].target.type);
- }
- }
-}
-
-static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
-{
- EbmlList *seekhead_list = &matroska->seekhead;
- MatroskaSeekhead *seekhead = seekhead_list->elem;
- uint32_t level_up = matroska->level_up;
- int64_t before_pos = avio_tell(matroska->ctx->pb);
- uint32_t saved_id = matroska->current_id;
- MatroskaLevel level;
- int64_t offset;
- int ret = 0;
-
- if (idx >= seekhead_list->nb_elem
- || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
- || seekhead[idx].id == MATROSKA_ID_CLUSTER)
- return 0;
-
- /* seek */
- offset = seekhead[idx].pos + matroska->segment_start;
- if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
- /* We don't want to lose our seekhead level, so we add
- * a dummy. This is a crude hack. */
- if (matroska->num_levels == EBML_MAX_DEPTH) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "Max EBML element depth (%d) reached, "
- "cannot parse further.\n", EBML_MAX_DEPTH);
- ret = AVERROR_INVALIDDATA;
- } else {
- level.start = 0;
- level.length = (uint64_t)-1;
- matroska->levels[matroska->num_levels] = level;
- matroska->num_levels++;
- matroska->current_id = 0;
-
- ret = ebml_parse(matroska, matroska_segment, matroska);
-
- /* remove dummy level */
- while (matroska->num_levels) {
- uint64_t length = matroska->levels[--matroska->num_levels].length;
- if (length == (uint64_t)-1)
- break;
- }
- }
- }
- /* seek back */
- avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
- matroska->level_up = level_up;
- matroska->current_id = saved_id;
-
- return ret;
-}
-
-static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
-{
- EbmlList *seekhead_list = &matroska->seekhead;
- int64_t before_pos = avio_tell(matroska->ctx->pb);
- int i;
-
- // we should not do any seeking in the streaming case
- if (!matroska->ctx->pb->seekable ||
- (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
- return;
-
- for (i = 0; i < seekhead_list->nb_elem; i++) {
- MatroskaSeekhead *seekhead = seekhead_list->elem;
- if (seekhead[i].pos <= before_pos)
- continue;
-
- // defer cues parsing until we actually need cue data.
- if (seekhead[i].id == MATROSKA_ID_CUES) {
- matroska->cues_parsing_deferred = 1;
- continue;
- }
-
- if (matroska_parse_seekhead_entry(matroska, i) < 0) {
- // mark index as broken
- matroska->cues_parsing_deferred = -1;
- break;
- }
- }
-}
-
-static void matroska_add_index_entries(MatroskaDemuxContext *matroska) {
- EbmlList *index_list;
- MatroskaIndex *index;
- int index_scale = 1;
- int i, j;
-
- index_list = &matroska->index;
- index = index_list->elem;
- if (index_list->nb_elem
- && index[0].time > 1E14/matroska->time_scale) {
- av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
- index_scale = matroska->time_scale;
- }
- for (i = 0; i < index_list->nb_elem; i++) {
- EbmlList *pos_list = &index[i].pos;
- MatroskaIndexPos *pos = pos_list->elem;
- for (j = 0; j < pos_list->nb_elem; j++) {
- MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
- if (track && track->stream)
- av_add_index_entry(track->stream,
- pos[j].pos + matroska->segment_start,
- index[i].time/index_scale, 0, 0,
- AVINDEX_KEYFRAME);
- }
- }
-}
-
-static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
- EbmlList *seekhead_list = &matroska->seekhead;
- MatroskaSeekhead *seekhead = seekhead_list->elem;
- int i;
-
- for (i = 0; i < seekhead_list->nb_elem; i++)
- if (seekhead[i].id == MATROSKA_ID_CUES)
- break;
- av_assert1(i <= seekhead_list->nb_elem);
-
- if (matroska_parse_seekhead_entry(matroska, i) < 0)
- matroska->cues_parsing_deferred = -1;
- matroska_add_index_entries(matroska);
-}
-
-static int matroska_aac_profile(char *codec_id)
-{
- static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
- int profile;
-
- for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
- if (strstr(codec_id, aac_profiles[profile]))
- break;
- return profile + 1;
-}
-
-static int matroska_aac_sri(int samplerate)
-{
- int sri;
-
- for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
- if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
- break;
- return sri;
-}
-
-static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
-{
- char buffer[32];
- /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
- time_t creation_time = date_utc / 1000000000 + 978307200;
- struct tm *ptm = gmtime(&creation_time);
- if (!ptm) return;
- strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
- av_dict_set(metadata, "creation_time", buffer, 0);
-}
-
-static int matroska_read_header(AVFormatContext *s)
-{
- MatroskaDemuxContext *matroska = s->priv_data;
- EbmlList *attachements_list = &matroska->attachments;
- MatroskaAttachement *attachements;
- EbmlList *chapters_list = &matroska->chapters;
- MatroskaChapter *chapters;
- MatroskaTrack *tracks;
- uint64_t max_start = 0;
- int64_t pos;
- Ebml ebml = { 0 };
- AVStream *st;
- int i, j, k, res;
-
- matroska->ctx = s;
-
- /* First read the EBML header. */
- if (ebml_parse(matroska, ebml_syntax, &ebml)
- || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
- || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 3 || !ebml.doctype) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "EBML header using unsupported features\n"
- "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
- ebml.version, ebml.doctype, ebml.doctype_version);
- ebml_free(ebml_syntax, &ebml);
- return AVERROR_PATCHWELCOME;
- } else if (ebml.doctype_version == 3) {
- av_log(matroska->ctx, AV_LOG_WARNING,
- "EBML header using unsupported features\n"
- "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
- ebml.version, ebml.doctype, ebml.doctype_version);
- }
- for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
- if (!strcmp(ebml.doctype, matroska_doctypes[i]))
- break;
- if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
- av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
- if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
- ebml_free(ebml_syntax, &ebml);
- return AVERROR_INVALIDDATA;
- }
- }
- ebml_free(ebml_syntax, &ebml);
-
- /* The next thing is a segment. */
- pos = avio_tell(matroska->ctx->pb);
- res = ebml_parse(matroska, matroska_segments, matroska);
- // try resyncing until we find a EBML_STOP type element.
- while (res != 1) {
- res = matroska_resync(matroska, pos);
- if (res < 0)
- return res;
- pos = avio_tell(matroska->ctx->pb);
- res = ebml_parse(matroska, matroska_segment, matroska);
- }
- matroska_execute_seekhead(matroska);
-
- if (!matroska->time_scale)
- matroska->time_scale = 1000000;
- if (matroska->duration)
- matroska->ctx->duration = matroska->duration * matroska->time_scale
- * 1000 / AV_TIME_BASE;
- av_dict_set(&s->metadata, "title", matroska->title, 0);
-
- if (matroska->date_utc.size == 8)
- matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
-
- tracks = matroska->tracks.elem;
- for (i=0; i < matroska->tracks.nb_elem; i++) {
- MatroskaTrack *track = &tracks[i];
- enum AVCodecID codec_id = AV_CODEC_ID_NONE;
- EbmlList *encodings_list = &track->encodings;
- MatroskaTrackEncoding *encodings = encodings_list->elem;
- uint8_t *extradata = NULL;
- int extradata_size = 0;
- int extradata_offset = 0;
- uint32_t fourcc = 0;
- AVIOContext b;
- char* key_id_base64 = NULL;
-
- /* Apply some sanity checks. */
- if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
- track->type != MATROSKA_TRACK_TYPE_AUDIO &&
- track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
- track->type != MATROSKA_TRACK_TYPE_METADATA) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown or unsupported track type %"PRIu64"\n",
- track->type);
- continue;
- }
- if (track->codec_id == NULL)
- continue;
-
- if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
- if (!track->default_duration && track->video.frame_rate > 0)
- track->default_duration = 1000000000/track->video.frame_rate;
- if (track->video.display_width == -1)
- track->video.display_width = track->video.pixel_width;
- if (track->video.display_height == -1)
- track->video.display_height = track->video.pixel_height;
- if (track->video.color_space.size == 4)
- fourcc = AV_RL32(track->video.color_space.data);
- } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
- if (!track->audio.out_samplerate)
- track->audio.out_samplerate = track->audio.samplerate;
- }
- if (encodings_list->nb_elem > 1) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Multiple combined encodings not supported");
- } else if (encodings_list->nb_elem == 1) {
- if (encodings[0].type) {
- if (encodings[0].encryption.key_id.size > 0) {
- /* Save the encryption key id to be stored later as a
- metadata tag. */
- const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
- key_id_base64 = av_malloc(b64_size);
- if (key_id_base64 == NULL)
- return AVERROR(ENOMEM);
-
- av_base64_encode(key_id_base64, b64_size,
- encodings[0].encryption.key_id.data,
- encodings[0].encryption.key_id.size);
- } else {
- encodings[0].scope = 0;
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Unsupported encoding type");
- }
- } else if (
-#if CONFIG_ZLIB
- encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
-#endif
-#if CONFIG_BZLIB
- encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
-#endif
-#if CONFIG_LZO
- encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
-#endif
- encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
- encodings[0].scope = 0;
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Unsupported encoding type");
- } else if (track->codec_priv.size && encodings[0].scope&2) {
- uint8_t *codec_priv = track->codec_priv.data;
- int ret = matroska_decode_buffer(&track->codec_priv.data,
- &track->codec_priv.size,
- track);
- if (ret < 0) {
- track->codec_priv.data = NULL;
- track->codec_priv.size = 0;
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Failed to decode codec private data\n");
- }
-
- if (codec_priv != track->codec_priv.data)
- av_free(codec_priv);
- }
- }
-
- for(j=0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++){
- if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
- strlen(ff_mkv_codec_tags[j].str))){
- codec_id= ff_mkv_codec_tags[j].id;
- break;
- }
- }
-
- st = track->stream = avformat_new_stream(s, NULL);
- if (st == NULL) {
- av_free(key_id_base64);
- return AVERROR(ENOMEM);
- }
-
- if (key_id_base64) {
- /* export encryption key id as base64 metadata tag */
- av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
- av_freep(&key_id_base64);
- }
-
- if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
- && track->codec_priv.size >= 40
- && track->codec_priv.data != NULL) {
- track->ms_compat = 1;
- fourcc = AV_RL32(track->codec_priv.data + 16);
- codec_id = ff_codec_get_id(ff_codec_bmp_tags, fourcc);
- extradata_offset = 40;
- } else if (!strcmp(track->codec_id, "A_MS/ACM")
- && track->codec_priv.size >= 14
- && track->codec_priv.data != NULL) {
- int ret;
- ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
- 0, NULL, NULL, NULL, NULL);
- ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
- if (ret < 0)
- return ret;
- codec_id = st->codec->codec_id;
- extradata_offset = FFMIN(track->codec_priv.size, 18);
- } else if (!strcmp(track->codec_id, "V_QUICKTIME")
- && (track->codec_priv.size >= 86)
- && (track->codec_priv.data != NULL)) {
- fourcc = AV_RL32(track->codec_priv.data);
- codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
- } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
- switch (track->audio.bitdepth) {
- case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
- case 24: codec_id = AV_CODEC_ID_PCM_S24BE; break;
- case 32: codec_id = AV_CODEC_ID_PCM_S32BE; break;
- }
- } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
- switch (track->audio.bitdepth) {
- case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
- case 24: codec_id = AV_CODEC_ID_PCM_S24LE; break;
- case 32: codec_id = AV_CODEC_ID_PCM_S32LE; break;
- }
- } else if (codec_id==AV_CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
- codec_id = AV_CODEC_ID_PCM_F64LE;
- } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
- int profile = matroska_aac_profile(track->codec_id);
- int sri = matroska_aac_sri(track->audio.samplerate);
- extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
- if (extradata == NULL)
- return AVERROR(ENOMEM);
- extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
- extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
- if (strstr(track->codec_id, "SBR")) {
- sri = matroska_aac_sri(track->audio.out_samplerate);
- extradata[2] = 0x56;
- extradata[3] = 0xE5;
- extradata[4] = 0x80 | (sri<<3);
- extradata_size = 5;
- } else
- extradata_size = 2;
- } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
- /* Only ALAC's magic cookie is stored in Matroska's track headers.
- Create the "atom size", "tag", and "tag version" fields the
- decoder expects manually. */
- extradata_size = 12 + track->codec_priv.size;
- extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (extradata == NULL)
- return AVERROR(ENOMEM);
- AV_WB32(extradata, extradata_size);
- memcpy(&extradata[4], "alac", 4);
- AV_WB32(&extradata[8], 0);
- memcpy(&extradata[12], track->codec_priv.data,
- track->codec_priv.size);
- } else if (codec_id == AV_CODEC_ID_TTA) {
- extradata_size = 30;
- extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (extradata == NULL)
- return AVERROR(ENOMEM);
- ffio_init_context(&b, extradata, extradata_size, 1,
- NULL, NULL, NULL, NULL);
- avio_write(&b, "TTA1", 4);
- avio_wl16(&b, 1);
- avio_wl16(&b, track->audio.channels);
- avio_wl16(&b, track->audio.bitdepth);
- if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
- return AVERROR_INVALIDDATA;
- avio_wl32(&b, track->audio.out_samplerate);
- avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale), track->audio.out_samplerate, AV_TIME_BASE * 1000));
- } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
- codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
- extradata_offset = 26;
- } else if (codec_id == AV_CODEC_ID_RA_144) {
- track->audio.out_samplerate = 8000;
- track->audio.channels = 1;
- } else if ((codec_id == AV_CODEC_ID_RA_288 || codec_id == AV_CODEC_ID_COOK ||
- codec_id == AV_CODEC_ID_ATRAC3 || codec_id == AV_CODEC_ID_SIPR)
- && track->codec_priv.data) {
- int flavor;
-
- ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
- 0, NULL, NULL, NULL, NULL);
- avio_skip(&b, 22);
- flavor = avio_rb16(&b);
- track->audio.coded_framesize = avio_rb32(&b);
- avio_skip(&b, 12);
- track->audio.sub_packet_h = avio_rb16(&b);
- track->audio.frame_size = avio_rb16(&b);
- track->audio.sub_packet_size = avio_rb16(&b);
- if (flavor < 0 || track->audio.coded_framesize <= 0 ||
- track->audio.sub_packet_h <= 0 || track->audio.frame_size <= 0 ||
- track->audio.sub_packet_size <= 0)
- return AVERROR_INVALIDDATA;
- track->audio.buf = av_malloc_array(track->audio.sub_packet_h, track->audio.frame_size);
- if (!track->audio.buf)
- return AVERROR(ENOMEM);
- if (codec_id == AV_CODEC_ID_RA_288) {
- st->codec->block_align = track->audio.coded_framesize;
- track->codec_priv.size = 0;
- } else {
- if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
- static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
- track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
- st->codec->bit_rate = sipr_bit_rate[flavor];
- }
- st->codec->block_align = track->audio.sub_packet_size;
- extradata_offset = 78;
- }
- }
- track->codec_priv.size -= extradata_offset;
-
- if (codec_id == AV_CODEC_ID_NONE)
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
-
- if (track->time_scale < 0.01)
- track->time_scale = 1.0;
- avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
-
- st->codec->codec_id = codec_id;
-
- if (strcmp(track->language, "und"))
- av_dict_set(&st->metadata, "language", track->language, 0);
- av_dict_set(&st->metadata, "title", track->name, 0);
-
- if (track->flag_default)
- st->disposition |= AV_DISPOSITION_DEFAULT;
- if (track->flag_forced)
- st->disposition |= AV_DISPOSITION_FORCED;
-
- if (!st->codec->extradata) {
- if(extradata){
- st->codec->extradata = extradata;
- st->codec->extradata_size = extradata_size;
- } else if(track->codec_priv.data && track->codec_priv.size > 0){
- if (ff_alloc_extradata(st->codec, track->codec_priv.size))
- return AVERROR(ENOMEM);
- memcpy(st->codec->extradata,
- track->codec_priv.data + extradata_offset,
- track->codec_priv.size);
- }
- }
-
- if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
- MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
-
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_tag = fourcc;
- st->codec->width = track->video.pixel_width;
- st->codec->height = track->video.pixel_height;
- av_reduce(&st->sample_aspect_ratio.num,
- &st->sample_aspect_ratio.den,
- st->codec->height * track->video.display_width,
- st->codec-> width * track->video.display_height,
- 255);
- if (st->codec->codec_id != AV_CODEC_ID_HEVC)
- st->need_parsing = AVSTREAM_PARSE_HEADERS;
-
- if (track->default_duration) {
- av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
- 1000000000, track->default_duration, 30000);
-#if FF_API_R_FRAME_RATE
- if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000L)
- st->r_frame_rate = st->avg_frame_rate;
-#endif
- }
-
- /* export stereo mode flag as metadata tag */
- if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
- av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
-
- /* export alpha mode flag as metadata tag */
- if (track->video.alpha_mode)
- av_dict_set(&st->metadata, "alpha_mode", "1", 0);
-
- /* if we have virtual track, mark the real tracks */
- for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
- char buf[32];
- if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
- continue;
- snprintf(buf, sizeof(buf), "%s_%d",
- ff_matroska_video_stereo_plane[planes[j].type], i);
- for (k=0; k < matroska->tracks.nb_elem; k++)
- if (planes[j].uid == tracks[k].uid) {
- av_dict_set(&s->streams[k]->metadata,
- "stereo_mode", buf, 0);
- break;
- }
- }
- } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->sample_rate = track->audio.out_samplerate;
- st->codec->channels = track->audio.channels;
- st->codec->bits_per_coded_sample = track->audio.bitdepth;
- if (st->codec->codec_id != AV_CODEC_ID_AAC)
- st->need_parsing = AVSTREAM_PARSE_HEADERS;
- if (track->codec_delay > 0) {
- st->codec->delay = av_rescale_q(track->codec_delay,
- (AVRational){1, 1000000000},
- (AVRational){1, st->codec->sample_rate});
- }
- if (track->seek_preroll > 0) {
- av_codec_set_seek_preroll(st->codec,
- av_rescale_q(track->seek_preroll,
- (AVRational){1, 1000000000},
- (AVRational){1, st->codec->sample_rate}));
- }
- } else if (codec_id == AV_CODEC_ID_WEBVTT) {
- st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
-
- if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
- st->disposition |= AV_DISPOSITION_CAPTIONS;
- } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
- st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
- } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
- st->disposition |= AV_DISPOSITION_METADATA;
- }
- } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
- st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
-#if FF_API_ASS_SSA
- if (st->codec->codec_id == AV_CODEC_ID_SSA ||
- st->codec->codec_id == AV_CODEC_ID_ASS)
-#else
- if (st->codec->codec_id == AV_CODEC_ID_ASS)
-#endif
- matroska->contains_ssa = 1;
- }
- }
-
- attachements = attachements_list->elem;
- for (j=0; j<attachements_list->nb_elem; j++) {
- if (!(attachements[j].filename && attachements[j].mime &&
- attachements[j].bin.data && attachements[j].bin.size > 0)) {
- av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
- } else {
- AVStream *st = avformat_new_stream(s, NULL);
- if (st == NULL)
- break;
- av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
- av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
- st->codec->codec_id = AV_CODEC_ID_NONE;
- st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
- if (ff_alloc_extradata(st->codec, attachements[j].bin.size))
- break;
- memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
-
- for (i=0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
- if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
- strlen(ff_mkv_mime_tags[i].str))) {
- st->codec->codec_id = ff_mkv_mime_tags[i].id;
- break;
- }
- }
- attachements[j].stream = st;
- }
- }
-
- chapters = chapters_list->elem;
- for (i=0; i<chapters_list->nb_elem; i++)
- if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
- && (max_start==0 || chapters[i].start > max_start)) {
- chapters[i].chapter =
- avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
- chapters[i].start, chapters[i].end,
- chapters[i].title);
- av_dict_set(&chapters[i].chapter->metadata,
- "title", chapters[i].title, 0);
- max_start = chapters[i].start;
- }
-
- matroska_add_index_entries(matroska);
-
- matroska_convert_tags(s);
-
- return 0;
-}
-
-/*
- * Put one packet in an application-supplied AVPacket struct.
- * Returns 0 on success or -1 on failure.
- */
-static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
- AVPacket *pkt)
-{
- if (matroska->num_packets > 0) {
- memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
- av_free(matroska->packets[0]);
- if (matroska->num_packets > 1) {
- void *newpackets;
- memmove(&matroska->packets[0], &matroska->packets[1],
- (matroska->num_packets - 1) * sizeof(AVPacket *));
- newpackets = av_realloc(matroska->packets,
- (matroska->num_packets - 1) * sizeof(AVPacket *));
- if (newpackets)
- matroska->packets = newpackets;
- } else {
- av_freep(&matroska->packets);
- matroska->prev_pkt = NULL;
- }
- matroska->num_packets--;
- return 0;
- }
-
- return -1;
-}
-
-/*
- * Free all packets in our internal queue.
- */
-static void matroska_clear_queue(MatroskaDemuxContext *matroska)
-{
- matroska->prev_pkt = NULL;
- if (matroska->packets) {
- int n;
- for (n = 0; n < matroska->num_packets; n++) {
- av_free_packet(matroska->packets[n]);
- av_free(matroska->packets[n]);
- }
- av_freep(&matroska->packets);
- matroska->num_packets = 0;
- }
-}
-
-static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
- int* buf_size, int type,
- uint32_t **lace_buf, int *laces)
-{
- int res = 0, n, size = *buf_size;
- uint8_t *data = *buf;
- uint32_t *lace_size;
-
- if (!type) {
- *laces = 1;
- *lace_buf = av_mallocz(sizeof(int));
- if (!*lace_buf)
- return AVERROR(ENOMEM);
-
- *lace_buf[0] = size;
- return 0;
- }
-
- av_assert0(size > 0);
- *laces = *data + 1;
- data += 1;
- size -= 1;
- lace_size = av_mallocz(*laces * sizeof(int));
- if (!lace_size)
- return AVERROR(ENOMEM);
-
- switch (type) {
- case 0x1: /* Xiph lacing */ {
- uint8_t temp;
- uint32_t total = 0;
- for (n = 0; res == 0 && n < *laces - 1; n++) {
- while (1) {
- if (size <= total) {
- res = AVERROR_INVALIDDATA;
- break;
- }
- temp = *data;
- total += temp;
- lace_size[n] += temp;
- data += 1;
- size -= 1;
- if (temp != 0xff)
- break;
- }
- }
- if (size <= total) {
- res = AVERROR_INVALIDDATA;
- break;
- }
-
- lace_size[n] = size - total;
- break;
- }
-
- case 0x2: /* fixed-size lacing */
- if (size % (*laces)) {
- res = AVERROR_INVALIDDATA;
- break;
- }
- for (n = 0; n < *laces; n++)
- lace_size[n] = size / *laces;
- break;
-
- case 0x3: /* EBML lacing */ {
- uint64_t num;
- uint64_t total;
- n = matroska_ebmlnum_uint(matroska, data, size, &num);
- if (n < 0 || num > INT_MAX) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "EBML block data error\n");
- res = n<0 ? n : AVERROR_INVALIDDATA;
- break;
- }
- data += n;
- size -= n;
- total = lace_size[0] = num;
- for (n = 1; res == 0 && n < *laces - 1; n++) {
- int64_t snum;
- int r;
- r = matroska_ebmlnum_sint(matroska, data, size, &snum);
- if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "EBML block data error\n");
- res = r<0 ? r : AVERROR_INVALIDDATA;
- break;
- }
- data += r;
- size -= r;
- lace_size[n] = lace_size[n - 1] + snum;
- total += lace_size[n];
- }
- if (size <= total) {
- res = AVERROR_INVALIDDATA;
- break;
- }
- lace_size[*laces - 1] = size - total;
- break;
- }
- }
-
- *buf = data;
- *lace_buf = lace_size;
- *buf_size = size;
-
- return res;
-}
-
-static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
- MatroskaTrack *track,
- AVStream *st,
- uint8_t *data, int size,
- uint64_t timecode,
- int64_t pos)
-{
- int a = st->codec->block_align;
- int sps = track->audio.sub_packet_size;
- int cfs = track->audio.coded_framesize;
- int h = track->audio.sub_packet_h;
- int y = track->audio.sub_packet_cnt;
- int w = track->audio.frame_size;
- int x;
-
- if (!track->audio.pkt_cnt) {
- if (track->audio.sub_packet_cnt == 0)
- track->audio.buf_timecode = timecode;
- if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
- if (size < cfs * h / 2) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Corrupt int4 RM-style audio packet size\n");
- return AVERROR_INVALIDDATA;
- }
- for (x=0; x<h/2; x++)
- memcpy(track->audio.buf+x*2*w+y*cfs,
- data+x*cfs, cfs);
- } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
- if (size < w) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Corrupt sipr RM-style audio packet size\n");
- return AVERROR_INVALIDDATA;
- }
- memcpy(track->audio.buf + y*w, data, w);
- } else {
- if (size < sps * w / sps || h<=0) {
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Corrupt generic RM-style audio packet size\n");
- return AVERROR_INVALIDDATA;
- }
- for (x=0; x<w/sps; x++)
- memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
- }
-
- if (++track->audio.sub_packet_cnt >= h) {
- if (st->codec->codec_id == AV_CODEC_ID_SIPR)
- ff_rm_reorder_sipr_data(track->audio.buf, h, w);
- track->audio.sub_packet_cnt = 0;
- track->audio.pkt_cnt = h*w / a;
- }
- }
-
- while (track->audio.pkt_cnt) {
- AVPacket *pkt = NULL;
- if (!(pkt = av_mallocz(sizeof(AVPacket))) || av_new_packet(pkt, a) < 0){
- av_free(pkt);
- return AVERROR(ENOMEM);
- }
- memcpy(pkt->data, track->audio.buf
- + a * (h*w / a - track->audio.pkt_cnt--), a);
- pkt->pts = track->audio.buf_timecode;
- track->audio.buf_timecode = AV_NOPTS_VALUE;
- pkt->pos = pos;
- pkt->stream_index = st->index;
- dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
- }
-
- return 0;
-}
-
-/* reconstruct full wavpack blocks from mangled matroska ones */
-static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
- uint8_t **pdst, int *size)
-{
- uint8_t *dst = NULL;
- int dstlen = 0;
- int srclen = *size;
- uint32_t samples;
- uint16_t ver;
- int ret, offset = 0;
-
- if (srclen < 12 || track->stream->codec->extradata_size < 2)
- return AVERROR_INVALIDDATA;
-
- ver = AV_RL16(track->stream->codec->extradata);
-
- samples = AV_RL32(src);
- src += 4;
- srclen -= 4;
-
- while (srclen >= 8) {
- int multiblock;
- uint32_t blocksize;
- uint8_t *tmp;
-
- uint32_t flags = AV_RL32(src);
- uint32_t crc = AV_RL32(src + 4);
- src += 8;
- srclen -= 8;
-
- multiblock = (flags & 0x1800) != 0x1800;
- if (multiblock) {
- if (srclen < 4) {
- ret = AVERROR_INVALIDDATA;
- goto fail;
- }
- blocksize = AV_RL32(src);
- src += 4;
- srclen -= 4;
- } else
- blocksize = srclen;
-
- if (blocksize > srclen) {
- ret = AVERROR_INVALIDDATA;
- goto fail;
- }
-
- tmp = av_realloc(dst, dstlen + blocksize + 32);
- if (!tmp) {
- ret = AVERROR(ENOMEM);
- goto fail;
- }
- dst = tmp;
- dstlen += blocksize + 32;
-
- AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
- AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
- AV_WL16(dst + offset + 8, ver); // version
- AV_WL16(dst + offset + 10, 0); // track/index_no
- AV_WL32(dst + offset + 12, 0); // total samples
- AV_WL32(dst + offset + 16, 0); // block index
- AV_WL32(dst + offset + 20, samples); // number of samples
- AV_WL32(dst + offset + 24, flags); // flags
- AV_WL32(dst + offset + 28, crc); // crc
- memcpy (dst + offset + 32, src, blocksize); // block data
-
- src += blocksize;
- srclen -= blocksize;
- offset += blocksize + 32;
- }
-
- *pdst = dst;
- *size = dstlen;
-
- return 0;
-
-fail:
- av_freep(&dst);
- return ret;
-}
-
-static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
- MatroskaTrack *track,
- AVStream *st,
- uint8_t *data, int data_len,
- uint64_t timecode,
- uint64_t duration,
- int64_t pos)
-{
- AVPacket *pkt;
- uint8_t *id, *settings, *text, *buf;
- int id_len, settings_len, text_len;
- uint8_t *p, *q;
- int err;
-
- if (data_len <= 0)
- return AVERROR_INVALIDDATA;
-
- p = data;
- q = data + data_len;
-
- id = p;
- id_len = -1;
- while (p < q) {
- if (*p == '\r' || *p == '\n') {
- id_len = p - id;
- if (*p == '\r')
- p++;
- break;
- }
- p++;
- }
-
- if (p >= q || *p != '\n')
- return AVERROR_INVALIDDATA;
- p++;
-
- settings = p;
- settings_len = -1;
- while (p < q) {
- if (*p == '\r' || *p == '\n') {
- settings_len = p - settings;
- if (*p == '\r')
- p++;
- break;
- }
- p++;
- }
-
- if (p >= q || *p != '\n')
- return AVERROR_INVALIDDATA;
- p++;
-
- text = p;
- text_len = q - p;
- while (text_len > 0) {
- const int len = text_len - 1;
- const uint8_t c = p[len];
- if (c != '\r' && c != '\n')
- break;
- text_len = len;
- }
-
- if (text_len <= 0)
- return AVERROR_INVALIDDATA;
-
- pkt = av_mallocz(sizeof(*pkt));
- err = av_new_packet(pkt, text_len);
- if (err < 0) {
- av_free(pkt);
- return AVERROR(err);
- }
-
- memcpy(pkt->data, text, text_len);
-
- if (id_len > 0) {
- buf = av_packet_new_side_data(pkt,
- AV_PKT_DATA_WEBVTT_IDENTIFIER,
- id_len);
- if (buf == NULL) {
- av_free(pkt);
- return AVERROR(ENOMEM);
- }
- memcpy(buf, id, id_len);
- }
-
- if (settings_len > 0) {
- buf = av_packet_new_side_data(pkt,
- AV_PKT_DATA_WEBVTT_SETTINGS,
- settings_len);
- if (buf == NULL) {
- av_free(pkt);
- return AVERROR(ENOMEM);
- }
- memcpy(buf, settings, settings_len);
- }
-
- // Do we need this for subtitles?
- // pkt->flags = AV_PKT_FLAG_KEY;
-
- pkt->stream_index = st->index;
- pkt->pts = timecode;
-
- // Do we need this for subtitles?
- // pkt->dts = timecode;
-
- pkt->duration = duration;
- pkt->pos = pos;
-
- dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
- matroska->prev_pkt = pkt;
-
- return 0;
-}
-
-static int matroska_parse_frame(MatroskaDemuxContext *matroska,
- MatroskaTrack *track,
- AVStream *st,
- uint8_t *data, int pkt_size,
- uint64_t timecode, uint64_t lace_duration,
- int64_t pos, int is_keyframe,
- uint8_t *additional, uint64_t additional_id, int additional_size,
- int64_t discard_padding)
-{
- MatroskaTrackEncoding *encodings = track->encodings.elem;
- uint8_t *pkt_data = data;
- int offset = 0, res;
- AVPacket *pkt;
-
- if (encodings && !encodings->type && encodings->scope & 1) {
- res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
- if (res < 0)
- return res;
- }
-
- if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
- uint8_t *wv_data;
- res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
- if (res < 0) {
- av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing a wavpack block.\n");
- goto fail;
- }
- if (pkt_data != data)
- av_freep(&pkt_data);
- pkt_data = wv_data;
- }
-
- if (st->codec->codec_id == AV_CODEC_ID_PRORES)
- offset = 8;
-
- pkt = av_mallocz(sizeof(AVPacket));
- /* XXX: prevent data copy... */
- if (av_new_packet(pkt, pkt_size + offset) < 0) {
- av_free(pkt);
- res = AVERROR(ENOMEM);
- goto fail;
- }
-
- if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
- uint8_t *buf = pkt->data;
- bytestream_put_be32(&buf, pkt_size);
- bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
- }
-
- memcpy(pkt->data + offset, pkt_data, pkt_size);
-
- if (pkt_data != data)
- av_freep(&pkt_data);
-
- pkt->flags = is_keyframe;
- pkt->stream_index = st->index;
-
- if (additional_size > 0) {
- uint8_t *side_data = av_packet_new_side_data(pkt,
- AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
- additional_size + 8);
- if(side_data == NULL) {
- av_free_packet(pkt);
- av_free(pkt);
- return AVERROR(ENOMEM);
- }
- AV_WB64(side_data, additional_id);
- memcpy(side_data + 8, additional, additional_size);
- }
-
- if (discard_padding) {
- uint8_t *side_data = av_packet_new_side_data(pkt,
- AV_PKT_DATA_SKIP_SAMPLES,
- 10);
- if(side_data == NULL) {
- av_free_packet(pkt);
- av_free(pkt);
- return AVERROR(ENOMEM);
- }
- AV_WL32(side_data, 0);
- AV_WL32(side_data + 4, av_rescale_q(discard_padding,
- (AVRational){1, 1000000000},
- (AVRational){1, st->codec->sample_rate}));
- }
-
- if (track->ms_compat)
- pkt->dts = timecode;
- else
- pkt->pts = timecode;
- pkt->pos = pos;
- if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
- /*
- * For backward compatibility.
- * Historically, we have put subtitle duration
- * in convergence_duration, on the off chance
- * that the time_scale is less than 1us, which
- * could result in a 32bit overflow on the
- * normal duration field.
- */
- pkt->convergence_duration = lace_duration;
- }
-
- if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
- lace_duration <= INT_MAX) {
- /*
- * For non subtitle tracks, just store the duration
- * as normal.
- *
- * If it's a subtitle track and duration value does
- * not overflow a uint32, then also store it normally.
- */
- pkt->duration = lace_duration;
- }
-
-#if FF_API_ASS_SSA
- if (st->codec->codec_id == AV_CODEC_ID_SSA)
- matroska_fix_ass_packet(matroska, pkt, lace_duration);
-
- if (matroska->prev_pkt &&
- timecode != AV_NOPTS_VALUE &&
- matroska->prev_pkt->pts == timecode &&
- matroska->prev_pkt->stream_index == st->index &&
- st->codec->codec_id == AV_CODEC_ID_SSA)
- matroska_merge_packets(matroska->prev_pkt, pkt);
- else {
- dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
- matroska->prev_pkt = pkt;
- }
-#else
- dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
- matroska->prev_pkt = pkt;
-#endif
-
- return 0;
-fail:
- if (pkt_data != data)
- av_freep(&pkt_data);
- return res;
-}
-
-static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
- int size, int64_t pos, uint64_t cluster_time,
- uint64_t block_duration, int is_keyframe,
- uint8_t *additional, uint64_t additional_id, int additional_size,
- int64_t cluster_pos, int64_t discard_padding)
-{
- uint64_t timecode = AV_NOPTS_VALUE;
- MatroskaTrack *track;
- int res = 0;
- AVStream *st;
- int16_t block_time;
- uint32_t *lace_size = NULL;
- int n, flags, laces = 0;
- uint64_t num;
- int trust_default_duration = 1;
-
- if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
- av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
- return n;
- }
- data += n;
- size -= n;
-
- track = matroska_find_track_by_num(matroska, num);
- if (!track || !track->stream) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "Invalid stream %"PRIu64" or size %u\n", num, size);
- return AVERROR_INVALIDDATA;
- } else if (size <= 3)
- return 0;
- st = track->stream;
- if (st->discard >= AVDISCARD_ALL)
- return res;
- av_assert1(block_duration != AV_NOPTS_VALUE);
-
- block_time = sign_extend(AV_RB16(data), 16);
- data += 2;
- flags = *data++;
- size -= 3;
- if (is_keyframe == -1)
- is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
-
- if (cluster_time != (uint64_t)-1
- && (block_time >= 0 || cluster_time >= -block_time)) {
- timecode = cluster_time + block_time;
- if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
- && timecode < track->end_timecode)
- is_keyframe = 0; /* overlapping subtitles are not key frame */
- if (is_keyframe)
- av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
- }
-
- if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
- if (timecode < matroska->skip_to_timecode)
- return res;
- if (is_keyframe)
- matroska->skip_to_keyframe = 0;
- else if (!st->skip_to_keyframe) {
- av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
- matroska->skip_to_keyframe = 0;
- }
- }
-
- res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
- &lace_size, &laces);
-
- if (res)
- goto end;
-
- if (track->audio.samplerate == 8000) {
- // If this is needed for more codecs, then add them here
- if (st->codec->codec_id == AV_CODEC_ID_AC3) {
- if(track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
- trust_default_duration = 0;
- }
- }
-
- if (!block_duration && trust_default_duration)
- block_duration = track->default_duration * laces / matroska->time_scale;
-
- if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
- track->end_timecode =
- FFMAX(track->end_timecode, timecode + block_duration);
-
- for (n = 0; n < laces; n++) {
- int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
-
- if (lace_size[n] > size) {
- av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
- break;
- }
-
- if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
- st->codec->codec_id == AV_CODEC_ID_COOK ||
- st->codec->codec_id == AV_CODEC_ID_SIPR ||
- st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
- st->codec->block_align && track->audio.sub_packet_size) {
-
- res = matroska_parse_rm_audio(matroska, track, st, data,
- lace_size[n],
- timecode, pos);
- if (res)
- goto end;
-
- } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
- res = matroska_parse_webvtt(matroska, track, st,
- data, lace_size[n],
- timecode, lace_duration,
- pos);
- if (res)
- goto end;
-
- } else {
- res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
- timecode, lace_duration,
- pos, !n? is_keyframe : 0,
- additional, additional_id, additional_size,
- discard_padding);
- if (res)
- goto end;
- }
-
- if (timecode != AV_NOPTS_VALUE)
- timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
- data += lace_size[n];
- size -= lace_size[n];
- }
-
-end:
- av_free(lace_size);
- return res;
-}
-
-static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
-{
- EbmlList *blocks_list;
- MatroskaBlock *blocks;
- int i, res;
- res = ebml_parse(matroska,
- matroska_cluster_incremental_parsing,
- &matroska->current_cluster);
- if (res == 1) {
- /* New Cluster */
- if (matroska->current_cluster_pos)
- ebml_level_end(matroska);
- ebml_free(matroska_cluster, &matroska->current_cluster);
- memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
- matroska->current_cluster_num_blocks = 0;
- matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
- matroska->prev_pkt = NULL;
- /* sizeof the ID which was already read */
- if (matroska->current_id)
- matroska->current_cluster_pos -= 4;
- res = ebml_parse(matroska,
- matroska_clusters_incremental,
- &matroska->current_cluster);
- /* Try parsing the block again. */
- if (res == 1)
- res = ebml_parse(matroska,
- matroska_cluster_incremental_parsing,
- &matroska->current_cluster);
- }
-
- if (!res &&
- matroska->current_cluster_num_blocks <
- matroska->current_cluster.blocks.nb_elem) {
- blocks_list = &matroska->current_cluster.blocks;
- blocks = blocks_list->elem;
-
- matroska->current_cluster_num_blocks = blocks_list->nb_elem;
- i = blocks_list->nb_elem - 1;
- if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
- int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
- uint8_t* additional = blocks[i].additional.size > 0 ?
- blocks[i].additional.data : NULL;
- if (!blocks[i].non_simple)
- blocks[i].duration = 0;
- res = matroska_parse_block(matroska,
- blocks[i].bin.data, blocks[i].bin.size,
- blocks[i].bin.pos,
- matroska->current_cluster.timecode,
- blocks[i].duration, is_keyframe,
- additional, blocks[i].additional_id,
- blocks[i].additional.size,
- matroska->current_cluster_pos,
- blocks[i].discard_padding);
- }
- }
-
- return res;
-}
-
-static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
-{
- MatroskaCluster cluster = { 0 };
- EbmlList *blocks_list;
- MatroskaBlock *blocks;
- int i, res;
- int64_t pos;
- if (!matroska->contains_ssa)
- return matroska_parse_cluster_incremental(matroska);
- pos = avio_tell(matroska->ctx->pb);
- matroska->prev_pkt = NULL;
- if (matroska->current_id)
- pos -= 4; /* sizeof the ID which was already read */
- res = ebml_parse(matroska, matroska_clusters, &cluster);
- blocks_list = &cluster.blocks;
- blocks = blocks_list->elem;
- for (i=0; i<blocks_list->nb_elem; i++)
- if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
- int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
- res=matroska_parse_block(matroska,
- blocks[i].bin.data, blocks[i].bin.size,
- blocks[i].bin.pos, cluster.timecode,
- blocks[i].duration, is_keyframe, NULL, 0, 0,
- pos, blocks[i].discard_padding);
- }
- ebml_free(matroska_cluster, &cluster);
- return res;
-}
-
-static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- MatroskaDemuxContext *matroska = s->priv_data;
-
- while (matroska_deliver_packet(matroska, pkt)) {
- int64_t pos = avio_tell(matroska->ctx->pb);
- if (matroska->done)
- return AVERROR_EOF;
- if (matroska_parse_cluster(matroska) < 0)
- matroska_resync(matroska, pos);
- }
-
- return 0;
-}
-
-static int matroska_read_seek(AVFormatContext *s, int stream_index,
- int64_t timestamp, int flags)
-{
- MatroskaDemuxContext *matroska = s->priv_data;
- MatroskaTrack *tracks = matroska->tracks.elem;
- AVStream *st = s->streams[stream_index];
- int i, index, index_sub, index_min;
-
- /* Parse the CUES now since we need the index data to seek. */
- if (matroska->cues_parsing_deferred > 0) {
- matroska->cues_parsing_deferred = 0;
- matroska_parse_cues(matroska);
- }
-
- if (!st->nb_index_entries)
- goto err;
- timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
-
- if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
- avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
- matroska->current_id = 0;
- while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
- matroska_clear_queue(matroska);
- if (matroska_parse_cluster(matroska) < 0)
- break;
- }
- }
-
- matroska_clear_queue(matroska);
- if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
- goto err;
-
- index_min = index;
- for (i=0; i < matroska->tracks.nb_elem; i++) {
- tracks[i].audio.pkt_cnt = 0;
- tracks[i].audio.sub_packet_cnt = 0;
- tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
- tracks[i].end_timecode = 0;
- if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
- && tracks[i].stream->discard != AVDISCARD_ALL) {
- index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
- while(index_sub >= 0
- && index_min >= 0
- && tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos
- && st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
- index_min--;
- }
- }
-
- avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
- matroska->current_id = 0;
- if (flags & AVSEEK_FLAG_ANY) {
- st->skip_to_keyframe = 0;
- matroska->skip_to_timecode = timestamp;
- } else {
- st->skip_to_keyframe = 1;
- matroska->skip_to_timecode = st->index_entries[index].timestamp;
- }
- matroska->skip_to_keyframe = 1;
- matroska->done = 0;
- matroska->num_levels = 0;
- ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
- return 0;
-err:
- // slightly hackish but allows proper fallback to
- // the generic seeking code.
- matroska_clear_queue(matroska);
- matroska->current_id = 0;
- st->skip_to_keyframe =
- matroska->skip_to_keyframe = 0;
- matroska->done = 0;
- matroska->num_levels = 0;
- return -1;
-}
-
-static int matroska_read_close(AVFormatContext *s)
-{
- MatroskaDemuxContext *matroska = s->priv_data;
- MatroskaTrack *tracks = matroska->tracks.elem;
- int n;
-
- matroska_clear_queue(matroska);
-
- for (n=0; n < matroska->tracks.nb_elem; n++)
- if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
- av_free(tracks[n].audio.buf);
- ebml_free(matroska_cluster, &matroska->current_cluster);
- ebml_free(matroska_segment, matroska);
-
- return 0;
-}
-
-AVInputFormat ff_matroska_demuxer = {
- .name = "matroska,webm",
- .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
- .priv_data_size = sizeof(MatroskaDemuxContext),
- .read_probe = matroska_probe,
- .read_header = matroska_read_header,
- .read_packet = matroska_read_packet,
- .read_close = matroska_read_close,
- .read_seek = matroska_read_seek,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 13:44:49 +0000