| /* |
| * 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 "rm.h" |
| #include "matroska.h" |
| #include "libavcodec/mpeg4audio.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 scope; |
| uint64_t type; |
| MatroskaTrackCompression compression; |
| } 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; |
| } 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; |
| } 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 { |
| 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; |
| 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; |
| } MatroskaDemuxContext; |
| |
| typedef struct { |
| uint64_t duration; |
| int64_t reference; |
| uint64_t non_simple; |
| EbmlBin bin; |
| } MatroskaBlock; |
| |
| typedef struct { |
| uint64_t timecode; |
| EbmlList blocks; |
| } MatroskaCluster; |
| |
| 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_NONE }, |
| { 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_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[] = { |
| { 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_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_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 }, |
| { MATROSKA_ID_TRACKMAXBLKADDID, 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_blockgroup[] = { |
| { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, |
| { 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 const char *matroska_doctypes[] = { "matroska", "webm" }; |
| |
| /* |
| * 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 AVERROR(EIO); /* EOS or actual I/O error */ |
| } |
| |
| /* 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_free(bin->data); |
| if (!(bin->data = av_malloc(length))) |
| return AVERROR(ENOMEM); |
| |
| bin->size = length; |
| bin->pos = avio_tell(pb); |
| if (avio_read(pb, bin->data, length) != length) { |
| av_freep(&bin->data); |
| 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); |
| 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: 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* newpktdata; |
| int pkt_size = isize; |
| int result = 0; |
| int olen; |
| |
| if (pkt_size >= 10000000) |
| return -1; |
| |
| switch (encodings[0].compression.algo) { |
| case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: |
| return encodings[0].compression.settings.size; |
| case MATROSKA_TRACK_ENCODING_COMP_LZO: |
| do { |
| olen = pkt_size *= 3; |
| pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING); |
| result = av_lzo1x_decode(pkt_data, &olen, data, &isize); |
| } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000); |
| if (result) |
| goto failed; |
| pkt_size -= olen; |
| break; |
| #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) |
| 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) |
| goto failed; |
| break; |
| } |
| #endif |
| default: |
| return -1; |
| } |
| |
| *buf = pkt_data; |
| *buf_size = pkt_size; |
| return 0; |
| failed: |
| av_free(pkt_data); |
| return -1; |
| } |
| |
| static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, |
| AVPacket *pkt, uint64_t display_duration) |
| { |
| char *line, *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_malloc(len))) |
| return; |
| snprintf(line,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_free(pkt->data); |
| pkt->data = line; |
| pkt->size = strlen(line); |
| } |
| } |
| |
| static int matroska_merge_packets(AVPacket *out, AVPacket *in) |
| { |
| void *newdata = av_realloc(out->data, out->size+in->size); |
| if (!newdata) |
| return AVERROR(ENOMEM); |
| out->data = newdata; |
| memcpy(out->data+out->size, in->data, in->size); |
| out->size += in->size; |
| av_destruct_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 = 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) |
| 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); |
| |
| matroska_parse_seekhead_entry(matroska, i); |
| 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 int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| 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; |
| 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) { |
| 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); |
| } |
| ebml_free(ebml_syntax, &ebml); |
| |
| /* The next thing is a segment. */ |
| if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0) |
| return res; |
| 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); |
| |
| tracks = matroska->tracks.elem; |
| for (i=0; i < matroska->tracks.nb_elem; i++) { |
| MatroskaTrack *track = &tracks[i]; |
| enum CodecID codec_id = 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; |
| |
| /* 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->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 || |
| (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && |
| #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 |
| encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) { |
| 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 offset = matroska_decode_buffer(&track->codec_priv.data, |
| &track->codec_priv.size, |
| track); |
| if (offset < 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"); |
| } else if (offset > 0) { |
| track->codec_priv.data = av_malloc(track->codec_priv.size + offset); |
| memcpy(track->codec_priv.data, |
| encodings[0].compression.settings.data, offset); |
| memcpy(track->codec_priv.data+offset, codec_priv, |
| track->codec_priv.size); |
| track->codec_priv.size += offset; |
| } |
| if (codec_priv != track->codec_priv.data) |
| av_free(codec_priv); |
| } |
| } |
| |
| for(j=0; ff_mkv_codec_tags[j].id != 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) |
| return AVERROR(ENOMEM); |
| |
| 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, |
| AVIO_FLAG_READ, 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(codec_movvideo_tags, fourcc); |
| } else if (codec_id == CODEC_ID_PCM_S16BE) { |
| switch (track->audio.bitdepth) { |
| case 8: codec_id = CODEC_ID_PCM_U8; break; |
| case 24: codec_id = CODEC_ID_PCM_S24BE; break; |
| case 32: codec_id = CODEC_ID_PCM_S32BE; break; |
| } |
| } else if (codec_id == CODEC_ID_PCM_S16LE) { |
| switch (track->audio.bitdepth) { |
| case 8: codec_id = CODEC_ID_PCM_U8; break; |
| case 24: codec_id = CODEC_ID_PCM_S24LE; break; |
| case 32: codec_id = CODEC_ID_PCM_S32LE; break; |
| } |
| } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) { |
| codec_id = CODEC_ID_PCM_F64LE; |
| } else if (codec_id == 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 == 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 == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || |
| codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { |
| extradata_offset = 26; |
| } else if (codec_id == CODEC_ID_RA_144) { |
| track->audio.out_samplerate = 8000; |
| track->audio.channels = 1; |
| } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || |
| codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) { |
| 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 == CODEC_ID_RA_288) { |
| st->codec->block_align = track->audio.coded_framesize; |
| track->codec_priv.size = 0; |
| } else { |
| if (codec_id == 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 == CODEC_ID_NONE) |
| av_log(matroska->ctx, AV_LOG_INFO, |
| "Unknown/unsupported CodecID %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); |
| if (st->codec->codec_id != CODEC_ID_H264) |
| st->need_parsing = AVSTREAM_PARSE_HEADERS; |
| if (track->default_duration) |
| st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX); |
| |
| /* 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", matroska_video_stereo_mode[track->video.stereo_mode], 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", |
| 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; |
| if (st->codec->codec_id != CODEC_ID_AAC) |
| st->need_parsing = AVSTREAM_PARSE_HEADERS; |
| } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { |
| st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| } |
| } |
| |
| 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 = 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 != 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->num_packets--; |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| /* |
| * Free all packets in our internal queue. |
| */ |
| static void matroska_clear_queue(MatroskaDemuxContext *matroska) |
| { |
| 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_block(MatroskaDemuxContext *matroska, uint8_t *data, |
| int size, int64_t pos, uint64_t cluster_time, |
| uint64_t duration, int is_keyframe, |
| int64_t cluster_pos) |
| { |
| uint64_t timecode = AV_NOPTS_VALUE; |
| MatroskaTrack *track; |
| int res = 0; |
| AVStream *st; |
| AVPacket *pkt; |
| 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 res; |
| } |
| 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 res; |
| } else if (size <= 3) |
| return 0; |
| st = track->stream; |
| if (st->discard >= AVDISCARD_ALL) |
| return res; |
| if (!duration) |
| duration = track->default_duration / matroska->time_scale; |
| |
| 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); |
| track->end_timecode = FFMAX(track->end_timecode, timecode+duration); |
| } |
| |
| if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { |
| if (!is_keyframe || timecode < matroska->skip_to_timecode) |
| return res; |
| matroska->skip_to_keyframe = 0; |
| } |
| |
| switch ((flags & 0x06) >> 1) { |
| case 0x0: /* no lacing */ |
| laces = 1; |
| lace_size = av_mallocz(sizeof(int)); |
| lace_size[0] = size; |
| break; |
| |
| case 0x1: /* Xiph lacing */ |
| case 0x2: /* fixed-size lacing */ |
| case 0x3: /* EBML lacing */ |
| assert(size>0); // size <=3 is checked before size-=3 above |
| laces = (*data) + 1; |
| data += 1; |
| size -= 1; |
| lace_size = av_mallocz(laces * sizeof(int)); |
| |
| switch ((flags & 0x06) >> 1) { |
| 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 = -1; |
| break; |
| } |
| temp = *data; |
| lace_size[n] += temp; |
| data += 1; |
| size -= 1; |
| if (temp != 0xff) |
| break; |
| } |
| total += lace_size[n]; |
| } |
| lace_size[n] = size - total; |
| break; |
| } |
| |
| case 0x2: /* fixed-size lacing */ |
| for (n = 0; n < laces; n++) |
| lace_size[n] = size / laces; |
| break; |
| |
| case 0x3: /* EBML lacing */ { |
| 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"); |
| 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"); |
| break; |
| } |
| data += r; |
| size -= r; |
| lace_size[n] = lace_size[n - 1] + snum; |
| total += lace_size[n]; |
| } |
| lace_size[laces - 1] = size - total; |
| break; |
| } |
| } |
| break; |
| } |
| |
| if (res == 0) { |
| for (n = 0; n < laces; n++) { |
| if ((st->codec->codec_id == CODEC_ID_RA_288 || |
| st->codec->codec_id == CODEC_ID_COOK || |
| st->codec->codec_id == CODEC_ID_SIPR || |
| st->codec->codec_id == CODEC_ID_ATRAC3) && |
| st->codec->block_align && track->audio.sub_packet_size) { |
| 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 == 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 == 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) { |
| 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 == 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) { |
| pkt = av_mallocz(sizeof(AVPacket)); |
| av_new_packet(pkt, a); |
| 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); |
| } |
| } else { |
| MatroskaTrackEncoding *encodings = track->encodings.elem; |
| int offset = 0, pkt_size = lace_size[n]; |
| uint8_t *pkt_data = data; |
| |
| if (pkt_size > size) { |
| av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n"); |
| break; |
| } |
| |
| if (encodings && encodings->scope & 1) { |
| offset = matroska_decode_buffer(&pkt_data,&pkt_size, track); |
| if (offset < 0) |
| continue; |
| } |
| |
| pkt = av_mallocz(sizeof(AVPacket)); |
| /* XXX: prevent data copy... */ |
| if (av_new_packet(pkt, pkt_size+offset) < 0) { |
| av_free(pkt); |
| res = AVERROR(ENOMEM); |
| break; |
| } |
| if (offset) |
| memcpy (pkt->data, encodings->compression.settings.data, offset); |
| memcpy (pkt->data+offset, pkt_data, pkt_size); |
| |
| if (pkt_data != data) |
| av_free(pkt_data); |
| |
| if (n == 0) |
| pkt->flags = is_keyframe; |
| pkt->stream_index = st->index; |
| |
| if (track->ms_compat) |
| pkt->dts = timecode; |
| else |
| pkt->pts = timecode; |
| pkt->pos = pos; |
| if (st->codec->codec_id == CODEC_ID_TEXT) |
| pkt->convergence_duration = duration; |
| else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE) |
| pkt->duration = duration; |
| |
| if (st->codec->codec_id == CODEC_ID_SSA) |
| matroska_fix_ass_packet(matroska, pkt, 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 == CODEC_ID_SSA) |
| matroska_merge_packets(matroska->prev_pkt, pkt); |
| else { |
| dynarray_add(&matroska->packets,&matroska->num_packets,pkt); |
| matroska->prev_pkt = pkt; |
| } |
| } |
| |
| if (timecode != AV_NOPTS_VALUE) |
| timecode = duration ? timecode + duration : AV_NOPTS_VALUE; |
| data += lace_size[n]; |
| size -= lace_size[n]; |
| } |
| } |
| |
| av_free(lace_size); |
| return res; |
| } |
| |
| static int matroska_parse_cluster(MatroskaDemuxContext *matroska) |
| { |
| MatroskaCluster cluster = { 0 }; |
| EbmlList *blocks_list; |
| MatroskaBlock *blocks; |
| int i, res; |
| int64_t 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, |
| pos); |
| } |
| ebml_free(matroska_cluster, &cluster); |
| if (res < 0) matroska->done = 1; |
| return res; |
| } |
| |
| static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| MatroskaDemuxContext *matroska = s->priv_data; |
| |
| while (matroska_deliver_packet(matroska, pkt)) { |
| if (matroska->done) |
| return AVERROR_EOF; |
| matroska_parse_cluster(matroska); |
| } |
| |
| 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) { |
| matroska_parse_cues(matroska); |
| matroska->cues_parsing_deferred = 0; |
| } |
| |
| if (!st->nb_index_entries) |
| return 0; |
| 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) |
| return 0; |
| |
| 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; |
| matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); |
| matroska->skip_to_timecode = st->index_entries[index].timestamp; |
| matroska->done = 0; |
| ff_update_cur_dts(s, st, st->index_entries[index].timestamp); |
| return 0; |
| } |
| |
| 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_segment, matroska); |
| |
| return 0; |
| } |
| |
| AVInputFormat ff_matroska_demuxer = { |
| .name = "matroska,webm", |
| .long_name = NULL_IF_CONFIG_SMALL("Matroska/WebM file format"), |
| .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, |
| }; |