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authorTim Redfern <tim@eclectronics.org>2013-08-26 15:10:18 +0100
committerTim Redfern <tim@eclectronics.org>2013-08-26 15:10:18 +0100
commit150c9823e71a161e97003849cf8b2f55b21520bd (patch)
tree3559c840cf403d1386708b2591d58f928c7b160d /ffmpeg1/libavformat/matroskadec.c
parentb4b1e2630c95d5e6014463f7608d59dc2322a3b8 (diff)
adding ffmpeg specific version
Diffstat (limited to 'ffmpeg1/libavformat/matroskadec.c')
-rw-r--r--ffmpeg1/libavformat/matroskadec.c2557
1 files changed, 2557 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/matroskadec.c b/ffmpeg1/libavformat/matroskadec.c
new file mode 100644
index 0000000..eea29da
--- /dev/null
+++ b/ffmpeg1/libavformat/matroskadec.c
@@ -0,0 +1,2557 @@
+/*
+ * 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_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;
+ 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;
+} 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) },
+ { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
+ { 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_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_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_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
+ { 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 || avio_tell(pb) <= last_pos)
+ 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 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:
+ *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
+ 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(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_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_MAX/2;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+ assert(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) {
+ 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)
+ track->video.display_width = track->video.pixel_width;
+ if (!track->video.display_height)
+ 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_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_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_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);
+ avio_wl32(&b, track->audio.out_samplerate);
+ avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
+ } 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);
+ track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
+ 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) {
+ 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;
+ st->start_time = 0;
+ 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){
+ st->codec->extradata = av_mallocz(track->codec_priv.size +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+ if(st->codec->extradata == NULL)
+ return AVERROR(ENOMEM);
+ st->codec->extradata_size = track->codec_priv.size;
+ 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);
+ 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
+ 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;
+ } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ if (st->codec->codec_id == AV_CODEC_ID_SSA)
+ 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;
+ st->codec->extradata = av_malloc(attachements[j].bin.size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if(st->codec->extradata == NULL)
+ break;
+ st->codec->extradata_size = attachements[j].bin.size;
+ 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 size, int type,
+ uint32_t **lace_buf, int *laces)
+{
+ int res = 0, n;
+ 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 == 0) {
+ res = AVERROR_EOF;
+ break;
+ }
+ temp = *data;
+ lace_size[n] += temp;
+ data += 1;
+ size -= 1;
+ if (temp != 0xff)
+ break;
+ }
+ total += lace_size[n];
+ }
+ 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;
+ uint32_t total;
+ n = matroska_ebmlnum_uint(matroska, data, size, &num);
+ if (n < 0) {
+ av_log(matroska->ctx, AV_LOG_INFO,
+ "EBML block data error\n");
+ res = n;
+ 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) {
+ av_log(matroska->ctx, AV_LOG_INFO,
+ "EBML block data error\n");
+ res = r;
+ 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;
+
+ 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;
+}
+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)
+{
+ 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_PRORES)
+ offset = 8;
+
+ pkt = av_mallocz(sizeof(AVPacket));
+ /* XXX: prevent data copy... */
+ if (av_new_packet(pkt, pkt_size + offset) < 0) {
+ av_free(pkt);
+ return AVERROR(ENOMEM);
+ }
+
+ 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_free(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 (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 (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;
+ }
+
+ return 0;
+}
+
+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)
+{
+ 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;
+
+ 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 = AV_RB16(data);
+ 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 (!st->skip_to_keyframe) {
+ av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
+ matroska->skip_to_keyframe = 0;
+ }
+ if (is_keyframe)
+ matroska->skip_to_keyframe = 0;
+ }
+
+ res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
+ &lace_size, &laces);
+
+ if (res)
+ goto end;
+
+ if (!block_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, size,
+ timecode, 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);
+ 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);
+ }
+ }
+
+ if (res < 0) matroska->done = 1;
+ 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);
+ }
+ 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);
+ if (index_sub >= 0
+ && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
+ && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
+ index_min = index_sub;
+ }
+ }
+
+ 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 20:07:58 +0000