From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:57:22 +0100 Subject: making act segmenter --- ffmpeg/libavformat/matroskadec.c | 2557 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 2557 insertions(+) create mode 100644 ffmpeg/libavformat/matroskadec.c (limited to 'ffmpeg/libavformat/matroskadec.c') diff --git a/ffmpeg/libavformat/matroskadec.c b/ffmpeg/libavformat/matroskadec.c new file mode 100644 index 0000000..eea29da --- /dev/null +++ b/ffmpeg/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 + * @author with a little help from Moritz Bunkus + * @author totally reworked by Aurelien Jacobs + * @see specs available on the Matroska project page: http://www.matroska.org/ + */ + +#include +#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 +#endif +#if CONFIG_BZLIB +#include +#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; jnb_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!=',' && ptrpts + 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; jattachments.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; jchapters.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; jtracks.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; profilepriv_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; jnb_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; inb_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; xaudio.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; xaudio.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; inb_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, +}; -- cgit v1.2.3