Libav
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00001 /* 00002 * Matroska file demuxer 00003 * Copyright (c) 2003-2008 The FFmpeg Project 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00031 #include <stdio.h> 00032 #include "avformat.h" 00033 #include "internal.h" 00034 /* For ff_codec_get_id(). */ 00035 #include "riff.h" 00036 #include "isom.h" 00037 #include "rm.h" 00038 #include "matroska.h" 00039 #include "libavcodec/mpeg4audio.h" 00040 #include "libavutil/intfloat_readwrite.h" 00041 #include "libavutil/intreadwrite.h" 00042 #include "libavutil/avstring.h" 00043 #include "libavutil/lzo.h" 00044 #if CONFIG_ZLIB 00045 #include <zlib.h> 00046 #endif 00047 #if CONFIG_BZLIB 00048 #include <bzlib.h> 00049 #endif 00050 00051 typedef enum { 00052 EBML_NONE, 00053 EBML_UINT, 00054 EBML_FLOAT, 00055 EBML_STR, 00056 EBML_UTF8, 00057 EBML_BIN, 00058 EBML_NEST, 00059 EBML_PASS, 00060 EBML_STOP, 00061 } EbmlType; 00062 00063 typedef const struct EbmlSyntax { 00064 uint32_t id; 00065 EbmlType type; 00066 int list_elem_size; 00067 int data_offset; 00068 union { 00069 uint64_t u; 00070 double f; 00071 const char *s; 00072 const struct EbmlSyntax *n; 00073 } def; 00074 } EbmlSyntax; 00075 00076 typedef struct { 00077 int nb_elem; 00078 void *elem; 00079 } EbmlList; 00080 00081 typedef struct { 00082 int size; 00083 uint8_t *data; 00084 int64_t pos; 00085 } EbmlBin; 00086 00087 typedef struct { 00088 uint64_t version; 00089 uint64_t max_size; 00090 uint64_t id_length; 00091 char *doctype; 00092 uint64_t doctype_version; 00093 } Ebml; 00094 00095 typedef struct { 00096 uint64_t algo; 00097 EbmlBin settings; 00098 } MatroskaTrackCompression; 00099 00100 typedef struct { 00101 uint64_t scope; 00102 uint64_t type; 00103 MatroskaTrackCompression compression; 00104 } MatroskaTrackEncoding; 00105 00106 typedef struct { 00107 double frame_rate; 00108 uint64_t display_width; 00109 uint64_t display_height; 00110 uint64_t pixel_width; 00111 uint64_t pixel_height; 00112 uint64_t fourcc; 00113 } MatroskaTrackVideo; 00114 00115 typedef struct { 00116 double samplerate; 00117 double out_samplerate; 00118 uint64_t bitdepth; 00119 uint64_t channels; 00120 00121 /* real audio header (extracted from extradata) */ 00122 int coded_framesize; 00123 int sub_packet_h; 00124 int frame_size; 00125 int sub_packet_size; 00126 int sub_packet_cnt; 00127 int pkt_cnt; 00128 uint8_t *buf; 00129 } MatroskaTrackAudio; 00130 00131 typedef struct { 00132 uint64_t num; 00133 uint64_t uid; 00134 uint64_t type; 00135 char *name; 00136 char *codec_id; 00137 EbmlBin codec_priv; 00138 char *language; 00139 double time_scale; 00140 uint64_t default_duration; 00141 uint64_t flag_default; 00142 MatroskaTrackVideo video; 00143 MatroskaTrackAudio audio; 00144 EbmlList encodings; 00145 00146 AVStream *stream; 00147 int64_t end_timecode; 00148 int ms_compat; 00149 } MatroskaTrack; 00150 00151 typedef struct { 00152 uint64_t uid; 00153 char *filename; 00154 char *mime; 00155 EbmlBin bin; 00156 00157 AVStream *stream; 00158 } MatroskaAttachement; 00159 00160 typedef struct { 00161 uint64_t start; 00162 uint64_t end; 00163 uint64_t uid; 00164 char *title; 00165 00166 AVChapter *chapter; 00167 } MatroskaChapter; 00168 00169 typedef struct { 00170 uint64_t track; 00171 uint64_t pos; 00172 } MatroskaIndexPos; 00173 00174 typedef struct { 00175 uint64_t time; 00176 EbmlList pos; 00177 } MatroskaIndex; 00178 00179 typedef struct { 00180 char *name; 00181 char *string; 00182 char *lang; 00183 uint64_t def; 00184 EbmlList sub; 00185 } MatroskaTag; 00186 00187 typedef struct { 00188 char *type; 00189 uint64_t typevalue; 00190 uint64_t trackuid; 00191 uint64_t chapteruid; 00192 uint64_t attachuid; 00193 } MatroskaTagTarget; 00194 00195 typedef struct { 00196 MatroskaTagTarget target; 00197 EbmlList tag; 00198 } MatroskaTags; 00199 00200 typedef struct { 00201 uint64_t id; 00202 uint64_t pos; 00203 } MatroskaSeekhead; 00204 00205 typedef struct { 00206 uint64_t start; 00207 uint64_t length; 00208 } MatroskaLevel; 00209 00210 typedef struct { 00211 AVFormatContext *ctx; 00212 00213 /* EBML stuff */ 00214 int num_levels; 00215 MatroskaLevel levels[EBML_MAX_DEPTH]; 00216 int level_up; 00217 00218 uint64_t time_scale; 00219 double duration; 00220 char *title; 00221 EbmlList tracks; 00222 EbmlList attachments; 00223 EbmlList chapters; 00224 EbmlList index; 00225 EbmlList tags; 00226 EbmlList seekhead; 00227 00228 /* byte position of the segment inside the stream */ 00229 int64_t segment_start; 00230 00231 /* the packet queue */ 00232 AVPacket **packets; 00233 int num_packets; 00234 AVPacket *prev_pkt; 00235 00236 int done; 00237 int has_cluster_id; 00238 00239 /* What to skip before effectively reading a packet. */ 00240 int skip_to_keyframe; 00241 uint64_t skip_to_timecode; 00242 } MatroskaDemuxContext; 00243 00244 typedef struct { 00245 uint64_t duration; 00246 int64_t reference; 00247 uint64_t non_simple; 00248 EbmlBin bin; 00249 } MatroskaBlock; 00250 00251 typedef struct { 00252 uint64_t timecode; 00253 EbmlList blocks; 00254 } MatroskaCluster; 00255 00256 static EbmlSyntax ebml_header[] = { 00257 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} }, 00258 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} }, 00259 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} }, 00260 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} }, 00261 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} }, 00262 { EBML_ID_EBMLVERSION, EBML_NONE }, 00263 { EBML_ID_DOCTYPEVERSION, EBML_NONE }, 00264 { 0 } 00265 }; 00266 00267 static EbmlSyntax ebml_syntax[] = { 00268 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} }, 00269 { 0 } 00270 }; 00271 00272 static EbmlSyntax matroska_info[] = { 00273 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} }, 00274 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) }, 00275 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) }, 00276 { MATROSKA_ID_WRITINGAPP, EBML_NONE }, 00277 { MATROSKA_ID_MUXINGAPP, EBML_NONE }, 00278 { MATROSKA_ID_DATEUTC, EBML_NONE }, 00279 { MATROSKA_ID_SEGMENTUID, EBML_NONE }, 00280 { 0 } 00281 }; 00282 00283 static EbmlSyntax matroska_track_video[] = { 00284 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) }, 00285 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) }, 00286 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) }, 00287 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) }, 00288 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) }, 00289 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) }, 00290 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE }, 00291 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE }, 00292 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE }, 00293 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE }, 00294 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE }, 00295 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE }, 00296 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE }, 00297 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE }, 00298 { 0 } 00299 }; 00300 00301 static EbmlSyntax matroska_track_audio[] = { 00302 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} }, 00303 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) }, 00304 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) }, 00305 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} }, 00306 { 0 } 00307 }; 00308 00309 static EbmlSyntax matroska_track_encoding_compression[] = { 00310 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} }, 00311 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) }, 00312 { 0 } 00313 }; 00314 00315 static EbmlSyntax matroska_track_encoding[] = { 00316 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} }, 00317 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} }, 00318 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} }, 00319 { MATROSKA_ID_ENCODINGORDER, EBML_NONE }, 00320 { 0 } 00321 }; 00322 00323 static EbmlSyntax matroska_track_encodings[] = { 00324 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} }, 00325 { 0 } 00326 }; 00327 00328 static EbmlSyntax matroska_track[] = { 00329 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) }, 00330 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) }, 00331 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) }, 00332 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) }, 00333 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) }, 00334 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) }, 00335 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} }, 00336 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) }, 00337 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} }, 00338 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} }, 00339 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} }, 00340 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} }, 00341 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} }, 00342 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE }, 00343 { MATROSKA_ID_TRACKFLAGFORCED, EBML_NONE }, 00344 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE }, 00345 { MATROSKA_ID_CODECNAME, EBML_NONE }, 00346 { MATROSKA_ID_CODECDECODEALL, EBML_NONE }, 00347 { MATROSKA_ID_CODECINFOURL, EBML_NONE }, 00348 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE }, 00349 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE }, 00350 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE }, 00351 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE }, 00352 { 0 } 00353 }; 00354 00355 static EbmlSyntax matroska_tracks[] = { 00356 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} }, 00357 { 0 } 00358 }; 00359 00360 static EbmlSyntax matroska_attachment[] = { 00361 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) }, 00362 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) }, 00363 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) }, 00364 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) }, 00365 { MATROSKA_ID_FILEDESC, EBML_NONE }, 00366 { 0 } 00367 }; 00368 00369 static EbmlSyntax matroska_attachments[] = { 00370 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} }, 00371 { 0 } 00372 }; 00373 00374 static EbmlSyntax matroska_chapter_display[] = { 00375 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) }, 00376 { MATROSKA_ID_CHAPLANG, EBML_NONE }, 00377 { 0 } 00378 }; 00379 00380 static EbmlSyntax matroska_chapter_entry[] = { 00381 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} }, 00382 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} }, 00383 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) }, 00384 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} }, 00385 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE }, 00386 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE }, 00387 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE }, 00388 { MATROSKA_ID_CHAPTERATOM, EBML_NONE }, 00389 { 0 } 00390 }; 00391 00392 static EbmlSyntax matroska_chapter[] = { 00393 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} }, 00394 { MATROSKA_ID_EDITIONUID, EBML_NONE }, 00395 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE }, 00396 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE }, 00397 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE }, 00398 { 0 } 00399 }; 00400 00401 static EbmlSyntax matroska_chapters[] = { 00402 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} }, 00403 { 0 } 00404 }; 00405 00406 static EbmlSyntax matroska_index_pos[] = { 00407 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) }, 00408 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) }, 00409 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE }, 00410 { 0 } 00411 }; 00412 00413 static EbmlSyntax matroska_index_entry[] = { 00414 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) }, 00415 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} }, 00416 { 0 } 00417 }; 00418 00419 static EbmlSyntax matroska_index[] = { 00420 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} }, 00421 { 0 } 00422 }; 00423 00424 static EbmlSyntax matroska_simpletag[] = { 00425 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) }, 00426 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) }, 00427 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} }, 00428 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) }, 00429 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} }, 00430 { 0 } 00431 }; 00432 00433 static EbmlSyntax matroska_tagtargets[] = { 00434 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) }, 00435 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} }, 00436 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) }, 00437 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) }, 00438 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) }, 00439 { 0 } 00440 }; 00441 00442 static EbmlSyntax matroska_tag[] = { 00443 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} }, 00444 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} }, 00445 { 0 } 00446 }; 00447 00448 static EbmlSyntax matroska_tags[] = { 00449 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} }, 00450 { 0 } 00451 }; 00452 00453 static EbmlSyntax matroska_seekhead_entry[] = { 00454 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) }, 00455 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} }, 00456 { 0 } 00457 }; 00458 00459 static EbmlSyntax matroska_seekhead[] = { 00460 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} }, 00461 { 0 } 00462 }; 00463 00464 static EbmlSyntax matroska_segment[] = { 00465 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } }, 00466 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } }, 00467 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} }, 00468 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } }, 00469 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } }, 00470 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } }, 00471 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } }, 00472 { MATROSKA_ID_CLUSTER, EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) }, 00473 { 0 } 00474 }; 00475 00476 static EbmlSyntax matroska_segments[] = { 00477 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } }, 00478 { 0 } 00479 }; 00480 00481 static EbmlSyntax matroska_blockgroup[] = { 00482 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, 00483 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, 00484 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} }, 00485 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) }, 00486 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} }, 00487 { 0 } 00488 }; 00489 00490 static EbmlSyntax matroska_cluster[] = { 00491 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) }, 00492 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} }, 00493 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} }, 00494 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE }, 00495 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE }, 00496 { 0 } 00497 }; 00498 00499 static EbmlSyntax matroska_clusters[] = { 00500 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} }, 00501 { MATROSKA_ID_INFO, EBML_NONE }, 00502 { MATROSKA_ID_CUES, EBML_NONE }, 00503 { MATROSKA_ID_TAGS, EBML_NONE }, 00504 { MATROSKA_ID_SEEKHEAD, EBML_NONE }, 00505 { 0 } 00506 }; 00507 00508 static const char *matroska_doctypes[] = { "matroska", "webm" }; 00509 00510 /* 00511 * Return: Whether we reached the end of a level in the hierarchy or not. 00512 */ 00513 static int ebml_level_end(MatroskaDemuxContext *matroska) 00514 { 00515 ByteIOContext *pb = matroska->ctx->pb; 00516 int64_t pos = url_ftell(pb); 00517 00518 if (matroska->num_levels > 0) { 00519 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1]; 00520 if (pos - level->start >= level->length) { 00521 matroska->num_levels--; 00522 return 1; 00523 } 00524 } 00525 return 0; 00526 } 00527 00528 /* 00529 * Read: an "EBML number", which is defined as a variable-length 00530 * array of bytes. The first byte indicates the length by giving a 00531 * number of 0-bits followed by a one. The position of the first 00532 * "one" bit inside the first byte indicates the length of this 00533 * number. 00534 * Returns: number of bytes read, < 0 on error 00535 */ 00536 static int ebml_read_num(MatroskaDemuxContext *matroska, ByteIOContext *pb, 00537 int max_size, uint64_t *number) 00538 { 00539 int len_mask = 0x80, read = 1, n = 1; 00540 int64_t total = 0; 00541 00542 /* The first byte tells us the length in bytes - get_byte() can normally 00543 * return 0, but since that's not a valid first ebmlID byte, we can 00544 * use it safely here to catch EOS. */ 00545 if (!(total = get_byte(pb))) { 00546 /* we might encounter EOS here */ 00547 if (!url_feof(pb)) { 00548 int64_t pos = url_ftell(pb); 00549 av_log(matroska->ctx, AV_LOG_ERROR, 00550 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", 00551 pos, pos); 00552 } 00553 return AVERROR(EIO); /* EOS or actual I/O error */ 00554 } 00555 00556 /* get the length of the EBML number */ 00557 while (read <= max_size && !(total & len_mask)) { 00558 read++; 00559 len_mask >>= 1; 00560 } 00561 if (read > max_size) { 00562 int64_t pos = url_ftell(pb) - 1; 00563 av_log(matroska->ctx, AV_LOG_ERROR, 00564 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", 00565 (uint8_t) total, pos, pos); 00566 return AVERROR_INVALIDDATA; 00567 } 00568 00569 /* read out length */ 00570 total &= ~len_mask; 00571 while (n++ < read) 00572 total = (total << 8) | get_byte(pb); 00573 00574 *number = total; 00575 00576 return read; 00577 } 00578 00579 /* 00580 * Read the next element as an unsigned int. 00581 * 0 is success, < 0 is failure. 00582 */ 00583 static int ebml_read_uint(ByteIOContext *pb, int size, uint64_t *num) 00584 { 00585 int n = 0; 00586 00587 if (size < 1 || size > 8) 00588 return AVERROR_INVALIDDATA; 00589 00590 /* big-endian ordering; build up number */ 00591 *num = 0; 00592 while (n++ < size) 00593 *num = (*num << 8) | get_byte(pb); 00594 00595 return 0; 00596 } 00597 00598 /* 00599 * Read the next element as a float. 00600 * 0 is success, < 0 is failure. 00601 */ 00602 static int ebml_read_float(ByteIOContext *pb, int size, double *num) 00603 { 00604 if (size == 4) { 00605 *num= av_int2flt(get_be32(pb)); 00606 } else if(size==8){ 00607 *num= av_int2dbl(get_be64(pb)); 00608 } else 00609 return AVERROR_INVALIDDATA; 00610 00611 return 0; 00612 } 00613 00614 /* 00615 * Read the next element as an ASCII string. 00616 * 0 is success, < 0 is failure. 00617 */ 00618 static int ebml_read_ascii(ByteIOContext *pb, int size, char **str) 00619 { 00620 av_free(*str); 00621 /* EBML strings are usually not 0-terminated, so we allocate one 00622 * byte more, read the string and NULL-terminate it ourselves. */ 00623 if (!(*str = av_malloc(size + 1))) 00624 return AVERROR(ENOMEM); 00625 if (get_buffer(pb, (uint8_t *) *str, size) != size) { 00626 av_free(*str); 00627 return AVERROR(EIO); 00628 } 00629 (*str)[size] = '\0'; 00630 00631 return 0; 00632 } 00633 00634 /* 00635 * Read the next element as binary data. 00636 * 0 is success, < 0 is failure. 00637 */ 00638 static int ebml_read_binary(ByteIOContext *pb, int length, EbmlBin *bin) 00639 { 00640 av_free(bin->data); 00641 if (!(bin->data = av_malloc(length))) 00642 return AVERROR(ENOMEM); 00643 00644 bin->size = length; 00645 bin->pos = url_ftell(pb); 00646 if (get_buffer(pb, bin->data, length) != length) 00647 return AVERROR(EIO); 00648 00649 return 0; 00650 } 00651 00652 /* 00653 * Read the next element, but only the header. The contents 00654 * are supposed to be sub-elements which can be read separately. 00655 * 0 is success, < 0 is failure. 00656 */ 00657 static int ebml_read_master(MatroskaDemuxContext *matroska, int length) 00658 { 00659 ByteIOContext *pb = matroska->ctx->pb; 00660 MatroskaLevel *level; 00661 00662 if (matroska->num_levels >= EBML_MAX_DEPTH) { 00663 av_log(matroska->ctx, AV_LOG_ERROR, 00664 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH); 00665 return AVERROR(ENOSYS); 00666 } 00667 00668 level = &matroska->levels[matroska->num_levels++]; 00669 level->start = url_ftell(pb); 00670 level->length = length; 00671 00672 return 0; 00673 } 00674 00675 /* 00676 * Read signed/unsigned "EBML" numbers. 00677 * Return: number of bytes processed, < 0 on error 00678 */ 00679 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, 00680 uint8_t *data, uint32_t size, uint64_t *num) 00681 { 00682 ByteIOContext pb; 00683 init_put_byte(&pb, data, size, 0, NULL, NULL, NULL, NULL); 00684 return ebml_read_num(matroska, &pb, 8, num); 00685 } 00686 00687 /* 00688 * Same as above, but signed. 00689 */ 00690 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, 00691 uint8_t *data, uint32_t size, int64_t *num) 00692 { 00693 uint64_t unum; 00694 int res; 00695 00696 /* read as unsigned number first */ 00697 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0) 00698 return res; 00699 00700 /* make signed (weird way) */ 00701 *num = unum - ((1LL << (7*res - 1)) - 1); 00702 00703 return res; 00704 } 00705 00706 static int ebml_parse_elem(MatroskaDemuxContext *matroska, 00707 EbmlSyntax *syntax, void *data); 00708 00709 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00710 uint32_t id, void *data) 00711 { 00712 int i; 00713 for (i=0; syntax[i].id; i++) 00714 if (id == syntax[i].id) 00715 break; 00716 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) 00717 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id); 00718 return ebml_parse_elem(matroska, &syntax[i], data); 00719 } 00720 00721 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00722 void *data) 00723 { 00724 uint64_t id; 00725 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id); 00726 id |= 1 << 7*res; 00727 return res < 0 ? res : ebml_parse_id(matroska, syntax, id, data); 00728 } 00729 00730 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00731 void *data) 00732 { 00733 int i, res = 0; 00734 00735 for (i=0; syntax[i].id; i++) 00736 switch (syntax[i].type) { 00737 case EBML_UINT: 00738 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u; 00739 break; 00740 case EBML_FLOAT: 00741 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f; 00742 break; 00743 case EBML_STR: 00744 case EBML_UTF8: 00745 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s); 00746 break; 00747 } 00748 00749 while (!res && !ebml_level_end(matroska)) 00750 res = ebml_parse(matroska, syntax, data); 00751 00752 return res; 00753 } 00754 00755 static int ebml_parse_elem(MatroskaDemuxContext *matroska, 00756 EbmlSyntax *syntax, void *data) 00757 { 00758 ByteIOContext *pb = matroska->ctx->pb; 00759 uint32_t id = syntax->id; 00760 uint64_t length; 00761 int res; 00762 void *newelem; 00763 00764 data = (char *)data + syntax->data_offset; 00765 if (syntax->list_elem_size) { 00766 EbmlList *list = data; 00767 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size); 00768 if (!newelem) 00769 return AVERROR(ENOMEM); 00770 list->elem = newelem; 00771 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size; 00772 memset(data, 0, syntax->list_elem_size); 00773 list->nb_elem++; 00774 } 00775 00776 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) 00777 if ((res = ebml_read_num(matroska, pb, 8, &length)) < 0) 00778 return res; 00779 00780 switch (syntax->type) { 00781 case EBML_UINT: res = ebml_read_uint (pb, length, data); break; 00782 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break; 00783 case EBML_STR: 00784 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break; 00785 case EBML_BIN: res = ebml_read_binary(pb, length, data); break; 00786 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0) 00787 return res; 00788 if (id == MATROSKA_ID_SEGMENT) 00789 matroska->segment_start = url_ftell(matroska->ctx->pb); 00790 return ebml_parse_nest(matroska, syntax->def.n, data); 00791 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data); 00792 case EBML_STOP: *(int *)data = 1; return 1; 00793 default: return url_fseek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0; 00794 } 00795 if (res == AVERROR_INVALIDDATA) 00796 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n"); 00797 else if (res == AVERROR(EIO)) 00798 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n"); 00799 return res; 00800 } 00801 00802 static void ebml_free(EbmlSyntax *syntax, void *data) 00803 { 00804 int i, j; 00805 for (i=0; syntax[i].id; i++) { 00806 void *data_off = (char *)data + syntax[i].data_offset; 00807 switch (syntax[i].type) { 00808 case EBML_STR: 00809 case EBML_UTF8: av_freep(data_off); break; 00810 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break; 00811 case EBML_NEST: 00812 if (syntax[i].list_elem_size) { 00813 EbmlList *list = data_off; 00814 char *ptr = list->elem; 00815 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size) 00816 ebml_free(syntax[i].def.n, ptr); 00817 av_free(list->elem); 00818 } else 00819 ebml_free(syntax[i].def.n, data_off); 00820 default: break; 00821 } 00822 } 00823 } 00824 00825 00826 /* 00827 * Autodetecting... 00828 */ 00829 static int matroska_probe(AVProbeData *p) 00830 { 00831 uint64_t total = 0; 00832 int len_mask = 0x80, size = 1, n = 1, i; 00833 00834 /* EBML header? */ 00835 if (AV_RB32(p->buf) != EBML_ID_HEADER) 00836 return 0; 00837 00838 /* length of header */ 00839 total = p->buf[4]; 00840 while (size <= 8 && !(total & len_mask)) { 00841 size++; 00842 len_mask >>= 1; 00843 } 00844 if (size > 8) 00845 return 0; 00846 total &= (len_mask - 1); 00847 while (n < size) 00848 total = (total << 8) | p->buf[4 + n++]; 00849 00850 /* Does the probe data contain the whole header? */ 00851 if (p->buf_size < 4 + size + total) 00852 return 0; 00853 00854 /* The header should contain a known document type. For now, 00855 * we don't parse the whole header but simply check for the 00856 * availability of that array of characters inside the header. 00857 * Not fully fool-proof, but good enough. */ 00858 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) { 00859 int probelen = strlen(matroska_doctypes[i]); 00860 for (n = 4+size; n <= 4+size+total-probelen; n++) 00861 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen)) 00862 return AVPROBE_SCORE_MAX; 00863 } 00864 00865 // probably valid EBML header but no recognized doctype 00866 return AVPROBE_SCORE_MAX/2; 00867 } 00868 00869 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska, 00870 int num) 00871 { 00872 MatroskaTrack *tracks = matroska->tracks.elem; 00873 int i; 00874 00875 for (i=0; i < matroska->tracks.nb_elem; i++) 00876 if (tracks[i].num == num) 00877 return &tracks[i]; 00878 00879 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num); 00880 return NULL; 00881 } 00882 00883 static int matroska_decode_buffer(uint8_t** buf, int* buf_size, 00884 MatroskaTrack *track) 00885 { 00886 MatroskaTrackEncoding *encodings = track->encodings.elem; 00887 uint8_t* data = *buf; 00888 int isize = *buf_size; 00889 uint8_t* pkt_data = NULL; 00890 uint8_t* newpktdata; 00891 int pkt_size = isize; 00892 int result = 0; 00893 int olen; 00894 00895 switch (encodings[0].compression.algo) { 00896 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: 00897 return encodings[0].compression.settings.size; 00898 case MATROSKA_TRACK_ENCODING_COMP_LZO: 00899 do { 00900 olen = pkt_size *= 3; 00901 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING); 00902 result = av_lzo1x_decode(pkt_data, &olen, data, &isize); 00903 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000); 00904 if (result) 00905 goto failed; 00906 pkt_size -= olen; 00907 break; 00908 #if CONFIG_ZLIB 00909 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { 00910 z_stream zstream = {0}; 00911 if (inflateInit(&zstream) != Z_OK) 00912 return -1; 00913 zstream.next_in = data; 00914 zstream.avail_in = isize; 00915 do { 00916 pkt_size *= 3; 00917 newpktdata = av_realloc(pkt_data, pkt_size); 00918 if (!newpktdata) { 00919 inflateEnd(&zstream); 00920 goto failed; 00921 } 00922 pkt_data = newpktdata; 00923 zstream.avail_out = pkt_size - zstream.total_out; 00924 zstream.next_out = pkt_data + zstream.total_out; 00925 result = inflate(&zstream, Z_NO_FLUSH); 00926 } while (result==Z_OK && pkt_size<10000000); 00927 pkt_size = zstream.total_out; 00928 inflateEnd(&zstream); 00929 if (result != Z_STREAM_END) 00930 goto failed; 00931 break; 00932 } 00933 #endif 00934 #if CONFIG_BZLIB 00935 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { 00936 bz_stream bzstream = {0}; 00937 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) 00938 return -1; 00939 bzstream.next_in = data; 00940 bzstream.avail_in = isize; 00941 do { 00942 pkt_size *= 3; 00943 newpktdata = av_realloc(pkt_data, pkt_size); 00944 if (!newpktdata) { 00945 BZ2_bzDecompressEnd(&bzstream); 00946 goto failed; 00947 } 00948 pkt_data = newpktdata; 00949 bzstream.avail_out = pkt_size - bzstream.total_out_lo32; 00950 bzstream.next_out = pkt_data + bzstream.total_out_lo32; 00951 result = BZ2_bzDecompress(&bzstream); 00952 } while (result==BZ_OK && pkt_size<10000000); 00953 pkt_size = bzstream.total_out_lo32; 00954 BZ2_bzDecompressEnd(&bzstream); 00955 if (result != BZ_STREAM_END) 00956 goto failed; 00957 break; 00958 } 00959 #endif 00960 default: 00961 return -1; 00962 } 00963 00964 *buf = pkt_data; 00965 *buf_size = pkt_size; 00966 return 0; 00967 failed: 00968 av_free(pkt_data); 00969 return -1; 00970 } 00971 00972 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, 00973 AVPacket *pkt, uint64_t display_duration) 00974 { 00975 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size; 00976 for (; *ptr!=',' && ptr<end-1; ptr++); 00977 if (*ptr == ',') 00978 layer = ++ptr; 00979 for (; *ptr!=',' && ptr<end-1; ptr++); 00980 if (*ptr == ',') { 00981 int64_t end_pts = pkt->pts + display_duration; 00982 int sc = matroska->time_scale * pkt->pts / 10000000; 00983 int ec = matroska->time_scale * end_pts / 10000000; 00984 int sh, sm, ss, eh, em, es, len; 00985 sh = sc/360000; sc -= 360000*sh; 00986 sm = sc/ 6000; sc -= 6000*sm; 00987 ss = sc/ 100; sc -= 100*ss; 00988 eh = ec/360000; ec -= 360000*eh; 00989 em = ec/ 6000; ec -= 6000*em; 00990 es = ec/ 100; ec -= 100*es; 00991 *ptr++ = '\0'; 00992 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE; 00993 if (!(line = av_malloc(len))) 00994 return; 00995 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n", 00996 layer, sh, sm, ss, sc, eh, em, es, ec, ptr); 00997 av_free(pkt->data); 00998 pkt->data = line; 00999 pkt->size = strlen(line); 01000 } 01001 } 01002 01003 static int matroska_merge_packets(AVPacket *out, AVPacket *in) 01004 { 01005 void *newdata = av_realloc(out->data, out->size+in->size); 01006 if (!newdata) 01007 return AVERROR(ENOMEM); 01008 out->data = newdata; 01009 memcpy(out->data+out->size, in->data, in->size); 01010 out->size += in->size; 01011 av_destruct_packet(in); 01012 av_free(in); 01013 return 0; 01014 } 01015 01016 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, 01017 AVMetadata **metadata, char *prefix) 01018 { 01019 MatroskaTag *tags = list->elem; 01020 char key[1024]; 01021 int i; 01022 01023 for (i=0; i < list->nb_elem; i++) { 01024 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL; 01025 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name); 01026 else av_strlcpy(key, tags[i].name, sizeof(key)); 01027 if (tags[i].def || !lang) { 01028 av_metadata_set2(metadata, key, tags[i].string, 0); 01029 if (tags[i].sub.nb_elem) 01030 matroska_convert_tag(s, &tags[i].sub, metadata, key); 01031 } 01032 if (lang) { 01033 av_strlcat(key, "-", sizeof(key)); 01034 av_strlcat(key, lang, sizeof(key)); 01035 av_metadata_set2(metadata, key, tags[i].string, 0); 01036 if (tags[i].sub.nb_elem) 01037 matroska_convert_tag(s, &tags[i].sub, metadata, key); 01038 } 01039 } 01040 } 01041 01042 static void matroska_convert_tags(AVFormatContext *s) 01043 { 01044 MatroskaDemuxContext *matroska = s->priv_data; 01045 MatroskaTags *tags = matroska->tags.elem; 01046 int i, j; 01047 01048 for (i=0; i < matroska->tags.nb_elem; i++) { 01049 if (tags[i].target.attachuid) { 01050 MatroskaAttachement *attachment = matroska->attachments.elem; 01051 for (j=0; j<matroska->attachments.nb_elem; j++) 01052 if (attachment[j].uid == tags[i].target.attachuid) 01053 matroska_convert_tag(s, &tags[i].tag, 01054 &attachment[j].stream->metadata, NULL); 01055 } else if (tags[i].target.chapteruid) { 01056 MatroskaChapter *chapter = matroska->chapters.elem; 01057 for (j=0; j<matroska->chapters.nb_elem; j++) 01058 if (chapter[j].uid == tags[i].target.chapteruid) 01059 matroska_convert_tag(s, &tags[i].tag, 01060 &chapter[j].chapter->metadata, NULL); 01061 } else if (tags[i].target.trackuid) { 01062 MatroskaTrack *track = matroska->tracks.elem; 01063 for (j=0; j<matroska->tracks.nb_elem; j++) 01064 if (track[j].uid == tags[i].target.trackuid) 01065 matroska_convert_tag(s, &tags[i].tag, 01066 &track[j].stream->metadata, NULL); 01067 } else { 01068 matroska_convert_tag(s, &tags[i].tag, &s->metadata, 01069 tags[i].target.type); 01070 } 01071 } 01072 } 01073 01074 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska) 01075 { 01076 EbmlList *seekhead_list = &matroska->seekhead; 01077 uint32_t level_up = matroska->level_up; 01078 int64_t before_pos = url_ftell(matroska->ctx->pb); 01079 MatroskaLevel level; 01080 int i; 01081 01082 for (i=0; i<seekhead_list->nb_elem; i++) { 01083 MatroskaSeekhead *seekhead = seekhead_list->elem; 01084 int64_t offset = seekhead[i].pos + matroska->segment_start; 01085 01086 if (seekhead[i].pos <= before_pos 01087 || seekhead[i].id == MATROSKA_ID_SEEKHEAD 01088 || seekhead[i].id == MATROSKA_ID_CLUSTER) 01089 continue; 01090 01091 /* seek */ 01092 if (url_fseek(matroska->ctx->pb, offset, SEEK_SET) != offset) 01093 continue; 01094 01095 /* We don't want to lose our seekhead level, so we add 01096 * a dummy. This is a crude hack. */ 01097 if (matroska->num_levels == EBML_MAX_DEPTH) { 01098 av_log(matroska->ctx, AV_LOG_INFO, 01099 "Max EBML element depth (%d) reached, " 01100 "cannot parse further.\n", EBML_MAX_DEPTH); 01101 break; 01102 } 01103 01104 level.start = 0; 01105 level.length = (uint64_t)-1; 01106 matroska->levels[matroska->num_levels] = level; 01107 matroska->num_levels++; 01108 01109 ebml_parse(matroska, matroska_segment, matroska); 01110 01111 /* remove dummy level */ 01112 while (matroska->num_levels) { 01113 uint64_t length = matroska->levels[--matroska->num_levels].length; 01114 if (length == (uint64_t)-1) 01115 break; 01116 } 01117 } 01118 01119 /* seek back */ 01120 url_fseek(matroska->ctx->pb, before_pos, SEEK_SET); 01121 matroska->level_up = level_up; 01122 } 01123 01124 static int matroska_aac_profile(char *codec_id) 01125 { 01126 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" }; 01127 int profile; 01128 01129 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++) 01130 if (strstr(codec_id, aac_profiles[profile])) 01131 break; 01132 return profile + 1; 01133 } 01134 01135 static int matroska_aac_sri(int samplerate) 01136 { 01137 int sri; 01138 01139 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++) 01140 if (ff_mpeg4audio_sample_rates[sri] == samplerate) 01141 break; 01142 return sri; 01143 } 01144 01145 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap) 01146 { 01147 MatroskaDemuxContext *matroska = s->priv_data; 01148 EbmlList *attachements_list = &matroska->attachments; 01149 MatroskaAttachement *attachements; 01150 EbmlList *chapters_list = &matroska->chapters; 01151 MatroskaChapter *chapters; 01152 MatroskaTrack *tracks; 01153 EbmlList *index_list; 01154 MatroskaIndex *index; 01155 int index_scale = 1; 01156 uint64_t max_start = 0; 01157 Ebml ebml = { 0 }; 01158 AVStream *st; 01159 int i, j; 01160 01161 matroska->ctx = s; 01162 01163 /* First read the EBML header. */ 01164 if (ebml_parse(matroska, ebml_syntax, &ebml) 01165 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t) 01166 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) { 01167 av_log(matroska->ctx, AV_LOG_ERROR, 01168 "EBML header using unsupported features\n" 01169 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", 01170 ebml.version, ebml.doctype, ebml.doctype_version); 01171 ebml_free(ebml_syntax, &ebml); 01172 return AVERROR_PATCHWELCOME; 01173 } 01174 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) 01175 if (!strcmp(ebml.doctype, matroska_doctypes[i])) 01176 break; 01177 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) { 01178 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype); 01179 } 01180 av_metadata_set2(&s->metadata, "doctype", ebml.doctype, 0); 01181 ebml_free(ebml_syntax, &ebml); 01182 01183 /* The next thing is a segment. */ 01184 if (ebml_parse(matroska, matroska_segments, matroska) < 0) 01185 return -1; 01186 matroska_execute_seekhead(matroska); 01187 01188 if (matroska->duration) 01189 matroska->ctx->duration = matroska->duration * matroska->time_scale 01190 * 1000 / AV_TIME_BASE; 01191 av_metadata_set2(&s->metadata, "title", matroska->title, 0); 01192 01193 tracks = matroska->tracks.elem; 01194 for (i=0; i < matroska->tracks.nb_elem; i++) { 01195 MatroskaTrack *track = &tracks[i]; 01196 enum CodecID codec_id = CODEC_ID_NONE; 01197 EbmlList *encodings_list = &tracks->encodings; 01198 MatroskaTrackEncoding *encodings = encodings_list->elem; 01199 uint8_t *extradata = NULL; 01200 int extradata_size = 0; 01201 int extradata_offset = 0; 01202 ByteIOContext b; 01203 01204 /* Apply some sanity checks. */ 01205 if (track->type != MATROSKA_TRACK_TYPE_VIDEO && 01206 track->type != MATROSKA_TRACK_TYPE_AUDIO && 01207 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { 01208 av_log(matroska->ctx, AV_LOG_INFO, 01209 "Unknown or unsupported track type %"PRIu64"\n", 01210 track->type); 01211 continue; 01212 } 01213 if (track->codec_id == NULL) 01214 continue; 01215 01216 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { 01217 if (!track->default_duration) 01218 track->default_duration = 1000000000/track->video.frame_rate; 01219 if (!track->video.display_width) 01220 track->video.display_width = track->video.pixel_width; 01221 if (!track->video.display_height) 01222 track->video.display_height = track->video.pixel_height; 01223 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { 01224 if (!track->audio.out_samplerate) 01225 track->audio.out_samplerate = track->audio.samplerate; 01226 } 01227 if (encodings_list->nb_elem > 1) { 01228 av_log(matroska->ctx, AV_LOG_ERROR, 01229 "Multiple combined encodings no supported"); 01230 } else if (encodings_list->nb_elem == 1) { 01231 if (encodings[0].type || 01232 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && 01233 #if CONFIG_ZLIB 01234 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB && 01235 #endif 01236 #if CONFIG_BZLIB 01237 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB && 01238 #endif 01239 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) { 01240 encodings[0].scope = 0; 01241 av_log(matroska->ctx, AV_LOG_ERROR, 01242 "Unsupported encoding type"); 01243 } else if (track->codec_priv.size && encodings[0].scope&2) { 01244 uint8_t *codec_priv = track->codec_priv.data; 01245 int offset = matroska_decode_buffer(&track->codec_priv.data, 01246 &track->codec_priv.size, 01247 track); 01248 if (offset < 0) { 01249 track->codec_priv.data = NULL; 01250 track->codec_priv.size = 0; 01251 av_log(matroska->ctx, AV_LOG_ERROR, 01252 "Failed to decode codec private data\n"); 01253 } else if (offset > 0) { 01254 track->codec_priv.data = av_malloc(track->codec_priv.size + offset); 01255 memcpy(track->codec_priv.data, 01256 encodings[0].compression.settings.data, offset); 01257 memcpy(track->codec_priv.data+offset, codec_priv, 01258 track->codec_priv.size); 01259 track->codec_priv.size += offset; 01260 } 01261 if (codec_priv != track->codec_priv.data) 01262 av_free(codec_priv); 01263 } 01264 } 01265 01266 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ 01267 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, 01268 strlen(ff_mkv_codec_tags[j].str))){ 01269 codec_id= ff_mkv_codec_tags[j].id; 01270 break; 01271 } 01272 } 01273 01274 st = track->stream = av_new_stream(s, 0); 01275 if (st == NULL) 01276 return AVERROR(ENOMEM); 01277 01278 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") 01279 && track->codec_priv.size >= 40 01280 && track->codec_priv.data != NULL) { 01281 track->ms_compat = 1; 01282 track->video.fourcc = AV_RL32(track->codec_priv.data + 16); 01283 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc); 01284 extradata_offset = 40; 01285 } else if (!strcmp(track->codec_id, "A_MS/ACM") 01286 && track->codec_priv.size >= 14 01287 && track->codec_priv.data != NULL) { 01288 init_put_byte(&b, track->codec_priv.data, track->codec_priv.size, 01289 URL_RDONLY, NULL, NULL, NULL, NULL); 01290 ff_get_wav_header(&b, st->codec, track->codec_priv.size); 01291 codec_id = st->codec->codec_id; 01292 extradata_offset = FFMIN(track->codec_priv.size, 18); 01293 } else if (!strcmp(track->codec_id, "V_QUICKTIME") 01294 && (track->codec_priv.size >= 86) 01295 && (track->codec_priv.data != NULL)) { 01296 track->video.fourcc = AV_RL32(track->codec_priv.data); 01297 codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc); 01298 } else if (codec_id == CODEC_ID_PCM_S16BE) { 01299 switch (track->audio.bitdepth) { 01300 case 8: codec_id = CODEC_ID_PCM_U8; break; 01301 case 24: codec_id = CODEC_ID_PCM_S24BE; break; 01302 case 32: codec_id = CODEC_ID_PCM_S32BE; break; 01303 } 01304 } else if (codec_id == CODEC_ID_PCM_S16LE) { 01305 switch (track->audio.bitdepth) { 01306 case 8: codec_id = CODEC_ID_PCM_U8; break; 01307 case 24: codec_id = CODEC_ID_PCM_S24LE; break; 01308 case 32: codec_id = CODEC_ID_PCM_S32LE; break; 01309 } 01310 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) { 01311 codec_id = CODEC_ID_PCM_F64LE; 01312 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) { 01313 int profile = matroska_aac_profile(track->codec_id); 01314 int sri = matroska_aac_sri(track->audio.samplerate); 01315 extradata = av_malloc(5); 01316 if (extradata == NULL) 01317 return AVERROR(ENOMEM); 01318 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); 01319 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3); 01320 if (strstr(track->codec_id, "SBR")) { 01321 sri = matroska_aac_sri(track->audio.out_samplerate); 01322 extradata[2] = 0x56; 01323 extradata[3] = 0xE5; 01324 extradata[4] = 0x80 | (sri<<3); 01325 extradata_size = 5; 01326 } else 01327 extradata_size = 2; 01328 } else if (codec_id == CODEC_ID_TTA) { 01329 extradata_size = 30; 01330 extradata = av_mallocz(extradata_size); 01331 if (extradata == NULL) 01332 return AVERROR(ENOMEM); 01333 init_put_byte(&b, extradata, extradata_size, 1, 01334 NULL, NULL, NULL, NULL); 01335 put_buffer(&b, "TTA1", 4); 01336 put_le16(&b, 1); 01337 put_le16(&b, track->audio.channels); 01338 put_le16(&b, track->audio.bitdepth); 01339 put_le32(&b, track->audio.out_samplerate); 01340 put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate); 01341 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || 01342 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { 01343 extradata_offset = 26; 01344 } else if (codec_id == CODEC_ID_RA_144) { 01345 track->audio.out_samplerate = 8000; 01346 track->audio.channels = 1; 01347 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || 01348 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) { 01349 int flavor; 01350 init_put_byte(&b, track->codec_priv.data,track->codec_priv.size, 01351 0, NULL, NULL, NULL, NULL); 01352 url_fskip(&b, 22); 01353 flavor = get_be16(&b); 01354 track->audio.coded_framesize = get_be32(&b); 01355 url_fskip(&b, 12); 01356 track->audio.sub_packet_h = get_be16(&b); 01357 track->audio.frame_size = get_be16(&b); 01358 track->audio.sub_packet_size = get_be16(&b); 01359 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h); 01360 if (codec_id == CODEC_ID_RA_288) { 01361 st->codec->block_align = track->audio.coded_framesize; 01362 track->codec_priv.size = 0; 01363 } else { 01364 if (codec_id == CODEC_ID_SIPR && flavor < 4) { 01365 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 }; 01366 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor]; 01367 st->codec->bit_rate = sipr_bit_rate[flavor]; 01368 } 01369 st->codec->block_align = track->audio.sub_packet_size; 01370 extradata_offset = 78; 01371 } 01372 } 01373 track->codec_priv.size -= extradata_offset; 01374 01375 if (codec_id == CODEC_ID_NONE) 01376 av_log(matroska->ctx, AV_LOG_INFO, 01377 "Unknown/unsupported CodecID %s.\n", track->codec_id); 01378 01379 if (track->time_scale < 0.01) 01380 track->time_scale = 1.0; 01381 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ 01382 01383 st->codec->codec_id = codec_id; 01384 st->start_time = 0; 01385 if (strcmp(track->language, "und")) 01386 av_metadata_set2(&st->metadata, "language", track->language, 0); 01387 av_metadata_set2(&st->metadata, "title", track->name, 0); 01388 01389 if (track->flag_default) 01390 st->disposition |= AV_DISPOSITION_DEFAULT; 01391 01392 if (track->default_duration) 01393 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, 01394 track->default_duration, 1000000000, 30000); 01395 01396 if (!st->codec->extradata) { 01397 if(extradata){ 01398 st->codec->extradata = extradata; 01399 st->codec->extradata_size = extradata_size; 01400 } else if(track->codec_priv.data && track->codec_priv.size > 0){ 01401 st->codec->extradata = av_mallocz(track->codec_priv.size + 01402 FF_INPUT_BUFFER_PADDING_SIZE); 01403 if(st->codec->extradata == NULL) 01404 return AVERROR(ENOMEM); 01405 st->codec->extradata_size = track->codec_priv.size; 01406 memcpy(st->codec->extradata, 01407 track->codec_priv.data + extradata_offset, 01408 track->codec_priv.size); 01409 } 01410 } 01411 01412 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { 01413 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 01414 st->codec->codec_tag = track->video.fourcc; 01415 st->codec->width = track->video.pixel_width; 01416 st->codec->height = track->video.pixel_height; 01417 av_reduce(&st->sample_aspect_ratio.num, 01418 &st->sample_aspect_ratio.den, 01419 st->codec->height * track->video.display_width, 01420 st->codec-> width * track->video.display_height, 01421 255); 01422 if (st->codec->codec_id != CODEC_ID_H264) 01423 st->need_parsing = AVSTREAM_PARSE_HEADERS; 01424 if (track->default_duration) 01425 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX); 01426 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { 01427 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 01428 st->codec->sample_rate = track->audio.out_samplerate; 01429 st->codec->channels = track->audio.channels; 01430 if (st->codec->codec_id != CODEC_ID_AAC) 01431 st->need_parsing = AVSTREAM_PARSE_HEADERS; 01432 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { 01433 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; 01434 } 01435 } 01436 01437 attachements = attachements_list->elem; 01438 for (j=0; j<attachements_list->nb_elem; j++) { 01439 if (!(attachements[j].filename && attachements[j].mime && 01440 attachements[j].bin.data && attachements[j].bin.size > 0)) { 01441 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); 01442 } else { 01443 AVStream *st = av_new_stream(s, 0); 01444 if (st == NULL) 01445 break; 01446 av_metadata_set2(&st->metadata, "filename",attachements[j].filename, 0); 01447 st->codec->codec_id = CODEC_ID_NONE; 01448 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; 01449 st->codec->extradata = av_malloc(attachements[j].bin.size); 01450 if(st->codec->extradata == NULL) 01451 break; 01452 st->codec->extradata_size = attachements[j].bin.size; 01453 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size); 01454 01455 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { 01456 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime, 01457 strlen(ff_mkv_mime_tags[i].str))) { 01458 st->codec->codec_id = ff_mkv_mime_tags[i].id; 01459 break; 01460 } 01461 } 01462 attachements[j].stream = st; 01463 } 01464 } 01465 01466 chapters = chapters_list->elem; 01467 for (i=0; i<chapters_list->nb_elem; i++) 01468 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid 01469 && (max_start==0 || chapters[i].start > max_start)) { 01470 chapters[i].chapter = 01471 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000}, 01472 chapters[i].start, chapters[i].end, 01473 chapters[i].title); 01474 av_metadata_set2(&chapters[i].chapter->metadata, 01475 "title", chapters[i].title, 0); 01476 max_start = chapters[i].start; 01477 } 01478 01479 index_list = &matroska->index; 01480 index = index_list->elem; 01481 if (index_list->nb_elem 01482 && index[0].time > 100000000000000/matroska->time_scale) { 01483 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n"); 01484 index_scale = matroska->time_scale; 01485 } 01486 for (i=0; i<index_list->nb_elem; i++) { 01487 EbmlList *pos_list = &index[i].pos; 01488 MatroskaIndexPos *pos = pos_list->elem; 01489 for (j=0; j<pos_list->nb_elem; j++) { 01490 MatroskaTrack *track = matroska_find_track_by_num(matroska, 01491 pos[j].track); 01492 if (track && track->stream) 01493 av_add_index_entry(track->stream, 01494 pos[j].pos + matroska->segment_start, 01495 index[i].time/index_scale, 0, 0, 01496 AVINDEX_KEYFRAME); 01497 } 01498 } 01499 01500 matroska_convert_tags(s); 01501 01502 return 0; 01503 } 01504 01505 /* 01506 * Put one packet in an application-supplied AVPacket struct. 01507 * Returns 0 on success or -1 on failure. 01508 */ 01509 static int matroska_deliver_packet(MatroskaDemuxContext *matroska, 01510 AVPacket *pkt) 01511 { 01512 if (matroska->num_packets > 0) { 01513 memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); 01514 av_free(matroska->packets[0]); 01515 if (matroska->num_packets > 1) { 01516 void *newpackets; 01517 memmove(&matroska->packets[0], &matroska->packets[1], 01518 (matroska->num_packets - 1) * sizeof(AVPacket *)); 01519 newpackets = av_realloc(matroska->packets, 01520 (matroska->num_packets - 1) * sizeof(AVPacket *)); 01521 if (newpackets) 01522 matroska->packets = newpackets; 01523 } else { 01524 av_freep(&matroska->packets); 01525 } 01526 matroska->num_packets--; 01527 return 0; 01528 } 01529 01530 return -1; 01531 } 01532 01533 /* 01534 * Free all packets in our internal queue. 01535 */ 01536 static void matroska_clear_queue(MatroskaDemuxContext *matroska) 01537 { 01538 if (matroska->packets) { 01539 int n; 01540 for (n = 0; n < matroska->num_packets; n++) { 01541 av_free_packet(matroska->packets[n]); 01542 av_free(matroska->packets[n]); 01543 } 01544 av_freep(&matroska->packets); 01545 matroska->num_packets = 0; 01546 } 01547 } 01548 01549 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, 01550 int size, int64_t pos, uint64_t cluster_time, 01551 uint64_t duration, int is_keyframe, 01552 int64_t cluster_pos) 01553 { 01554 uint64_t timecode = AV_NOPTS_VALUE; 01555 MatroskaTrack *track; 01556 int res = 0; 01557 AVStream *st; 01558 AVPacket *pkt; 01559 int16_t block_time; 01560 uint32_t *lace_size = NULL; 01561 int n, flags, laces = 0; 01562 uint64_t num; 01563 01564 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) { 01565 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); 01566 return res; 01567 } 01568 data += n; 01569 size -= n; 01570 01571 track = matroska_find_track_by_num(matroska, num); 01572 if (size <= 3 || !track || !track->stream) { 01573 av_log(matroska->ctx, AV_LOG_INFO, 01574 "Invalid stream %"PRIu64" or size %u\n", num, size); 01575 return res; 01576 } 01577 st = track->stream; 01578 if (st->discard >= AVDISCARD_ALL) 01579 return res; 01580 if (duration == AV_NOPTS_VALUE) 01581 duration = track->default_duration / matroska->time_scale; 01582 01583 block_time = AV_RB16(data); 01584 data += 2; 01585 flags = *data++; 01586 size -= 3; 01587 if (is_keyframe == -1) 01588 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0; 01589 01590 if (cluster_time != (uint64_t)-1 01591 && (block_time >= 0 || cluster_time >= -block_time)) { 01592 timecode = cluster_time + block_time; 01593 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE 01594 && timecode < track->end_timecode) 01595 is_keyframe = 0; /* overlapping subtitles are not key frame */ 01596 if (is_keyframe) 01597 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME); 01598 track->end_timecode = FFMAX(track->end_timecode, timecode+duration); 01599 } 01600 01601 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { 01602 if (!is_keyframe || timecode < matroska->skip_to_timecode) 01603 return res; 01604 matroska->skip_to_keyframe = 0; 01605 } 01606 01607 switch ((flags & 0x06) >> 1) { 01608 case 0x0: /* no lacing */ 01609 laces = 1; 01610 lace_size = av_mallocz(sizeof(int)); 01611 lace_size[0] = size; 01612 break; 01613 01614 case 0x1: /* Xiph lacing */ 01615 case 0x2: /* fixed-size lacing */ 01616 case 0x3: /* EBML lacing */ 01617 assert(size>0); // size <=3 is checked before size-=3 above 01618 laces = (*data) + 1; 01619 data += 1; 01620 size -= 1; 01621 lace_size = av_mallocz(laces * sizeof(int)); 01622 01623 switch ((flags & 0x06) >> 1) { 01624 case 0x1: /* Xiph lacing */ { 01625 uint8_t temp; 01626 uint32_t total = 0; 01627 for (n = 0; res == 0 && n < laces - 1; n++) { 01628 while (1) { 01629 if (size == 0) { 01630 res = -1; 01631 break; 01632 } 01633 temp = *data; 01634 lace_size[n] += temp; 01635 data += 1; 01636 size -= 1; 01637 if (temp != 0xff) 01638 break; 01639 } 01640 total += lace_size[n]; 01641 } 01642 lace_size[n] = size - total; 01643 break; 01644 } 01645 01646 case 0x2: /* fixed-size lacing */ 01647 for (n = 0; n < laces; n++) 01648 lace_size[n] = size / laces; 01649 break; 01650 01651 case 0x3: /* EBML lacing */ { 01652 uint32_t total; 01653 n = matroska_ebmlnum_uint(matroska, data, size, &num); 01654 if (n < 0) { 01655 av_log(matroska->ctx, AV_LOG_INFO, 01656 "EBML block data error\n"); 01657 break; 01658 } 01659 data += n; 01660 size -= n; 01661 total = lace_size[0] = num; 01662 for (n = 1; res == 0 && n < laces - 1; n++) { 01663 int64_t snum; 01664 int r; 01665 r = matroska_ebmlnum_sint(matroska, data, size, &snum); 01666 if (r < 0) { 01667 av_log(matroska->ctx, AV_LOG_INFO, 01668 "EBML block data error\n"); 01669 break; 01670 } 01671 data += r; 01672 size -= r; 01673 lace_size[n] = lace_size[n - 1] + snum; 01674 total += lace_size[n]; 01675 } 01676 lace_size[n] = size - total; 01677 break; 01678 } 01679 } 01680 break; 01681 } 01682 01683 if (res == 0) { 01684 for (n = 0; n < laces; n++) { 01685 if ((st->codec->codec_id == CODEC_ID_RA_288 || 01686 st->codec->codec_id == CODEC_ID_COOK || 01687 st->codec->codec_id == CODEC_ID_SIPR || 01688 st->codec->codec_id == CODEC_ID_ATRAC3) && 01689 st->codec->block_align && track->audio.sub_packet_size) { 01690 int a = st->codec->block_align; 01691 int sps = track->audio.sub_packet_size; 01692 int cfs = track->audio.coded_framesize; 01693 int h = track->audio.sub_packet_h; 01694 int y = track->audio.sub_packet_cnt; 01695 int w = track->audio.frame_size; 01696 int x; 01697 01698 if (!track->audio.pkt_cnt) { 01699 if (st->codec->codec_id == CODEC_ID_RA_288) 01700 for (x=0; x<h/2; x++) 01701 memcpy(track->audio.buf+x*2*w+y*cfs, 01702 data+x*cfs, cfs); 01703 else if (st->codec->codec_id == CODEC_ID_SIPR) 01704 memcpy(track->audio.buf + y*w, data, w); 01705 else 01706 for (x=0; x<w/sps; x++) 01707 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); 01708 01709 if (++track->audio.sub_packet_cnt >= h) { 01710 if (st->codec->codec_id == CODEC_ID_SIPR) 01711 ff_rm_reorder_sipr_data(track->audio.buf, h, w); 01712 track->audio.sub_packet_cnt = 0; 01713 track->audio.pkt_cnt = h*w / a; 01714 } 01715 } 01716 while (track->audio.pkt_cnt) { 01717 pkt = av_mallocz(sizeof(AVPacket)); 01718 av_new_packet(pkt, a); 01719 memcpy(pkt->data, track->audio.buf 01720 + a * (h*w / a - track->audio.pkt_cnt--), a); 01721 pkt->pos = pos; 01722 pkt->stream_index = st->index; 01723 dynarray_add(&matroska->packets,&matroska->num_packets,pkt); 01724 } 01725 } else { 01726 MatroskaTrackEncoding *encodings = track->encodings.elem; 01727 int offset = 0, pkt_size = lace_size[n]; 01728 uint8_t *pkt_data = data; 01729 01730 if (lace_size[n] > size) { 01731 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n"); 01732 break; 01733 } 01734 01735 if (encodings && encodings->scope & 1) { 01736 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track); 01737 if (offset < 0) 01738 continue; 01739 } 01740 01741 pkt = av_mallocz(sizeof(AVPacket)); 01742 /* XXX: prevent data copy... */ 01743 if (av_new_packet(pkt, pkt_size+offset) < 0) { 01744 av_free(pkt); 01745 res = AVERROR(ENOMEM); 01746 break; 01747 } 01748 if (offset) 01749 memcpy (pkt->data, encodings->compression.settings.data, offset); 01750 memcpy (pkt->data+offset, pkt_data, pkt_size); 01751 01752 if (pkt_data != data) 01753 av_free(pkt_data); 01754 01755 if (n == 0) 01756 pkt->flags = is_keyframe; 01757 pkt->stream_index = st->index; 01758 01759 if (track->ms_compat) 01760 pkt->dts = timecode; 01761 else 01762 pkt->pts = timecode; 01763 pkt->pos = pos; 01764 if (st->codec->codec_id == CODEC_ID_TEXT) 01765 pkt->convergence_duration = duration; 01766 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE) 01767 pkt->duration = duration; 01768 01769 if (st->codec->codec_id == CODEC_ID_SSA) 01770 matroska_fix_ass_packet(matroska, pkt, duration); 01771 01772 if (matroska->prev_pkt && 01773 timecode != AV_NOPTS_VALUE && 01774 matroska->prev_pkt->pts == timecode && 01775 matroska->prev_pkt->stream_index == st->index) 01776 matroska_merge_packets(matroska->prev_pkt, pkt); 01777 else { 01778 dynarray_add(&matroska->packets,&matroska->num_packets,pkt); 01779 matroska->prev_pkt = pkt; 01780 } 01781 } 01782 01783 if (timecode != AV_NOPTS_VALUE) 01784 timecode = duration ? timecode + duration : AV_NOPTS_VALUE; 01785 data += lace_size[n]; 01786 size -= lace_size[n]; 01787 } 01788 } 01789 01790 av_free(lace_size); 01791 return res; 01792 } 01793 01794 static int matroska_parse_cluster(MatroskaDemuxContext *matroska) 01795 { 01796 MatroskaCluster cluster = { 0 }; 01797 EbmlList *blocks_list; 01798 MatroskaBlock *blocks; 01799 int i, res; 01800 int64_t pos = url_ftell(matroska->ctx->pb); 01801 matroska->prev_pkt = NULL; 01802 if (matroska->has_cluster_id){ 01803 /* For the first cluster we parse, its ID was already read as 01804 part of matroska_read_header(), so don't read it again */ 01805 res = ebml_parse_id(matroska, matroska_clusters, 01806 MATROSKA_ID_CLUSTER, &cluster); 01807 pos -= 4; /* sizeof the ID which was already read */ 01808 matroska->has_cluster_id = 0; 01809 } else 01810 res = ebml_parse(matroska, matroska_clusters, &cluster); 01811 blocks_list = &cluster.blocks; 01812 blocks = blocks_list->elem; 01813 for (i=0; i<blocks_list->nb_elem; i++) 01814 if (blocks[i].bin.size > 0) { 01815 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1; 01816 res=matroska_parse_block(matroska, 01817 blocks[i].bin.data, blocks[i].bin.size, 01818 blocks[i].bin.pos, cluster.timecode, 01819 blocks[i].duration, is_keyframe, 01820 pos); 01821 } 01822 ebml_free(matroska_cluster, &cluster); 01823 if (res < 0) matroska->done = 1; 01824 return res; 01825 } 01826 01827 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt) 01828 { 01829 MatroskaDemuxContext *matroska = s->priv_data; 01830 01831 while (matroska_deliver_packet(matroska, pkt)) { 01832 if (matroska->done) 01833 return AVERROR_EOF; 01834 matroska_parse_cluster(matroska); 01835 } 01836 01837 return 0; 01838 } 01839 01840 static int matroska_read_seek(AVFormatContext *s, int stream_index, 01841 int64_t timestamp, int flags) 01842 { 01843 MatroskaDemuxContext *matroska = s->priv_data; 01844 MatroskaTrack *tracks = matroska->tracks.elem; 01845 AVStream *st = s->streams[stream_index]; 01846 int i, index, index_sub, index_min; 01847 01848 if (!st->nb_index_entries) 01849 return 0; 01850 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp); 01851 01852 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { 01853 url_fseek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET); 01854 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { 01855 matroska_clear_queue(matroska); 01856 if (matroska_parse_cluster(matroska) < 0) 01857 break; 01858 } 01859 } 01860 01861 matroska_clear_queue(matroska); 01862 if (index < 0) 01863 return 0; 01864 01865 index_min = index; 01866 for (i=0; i < matroska->tracks.nb_elem; i++) { 01867 tracks[i].end_timecode = 0; 01868 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE 01869 && !tracks[i].stream->discard != AVDISCARD_ALL) { 01870 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD); 01871 if (index_sub >= 0 01872 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos 01873 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale) 01874 index_min = index_sub; 01875 } 01876 } 01877 01878 url_fseek(s->pb, st->index_entries[index_min].pos, SEEK_SET); 01879 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); 01880 matroska->skip_to_timecode = st->index_entries[index].timestamp; 01881 matroska->done = 0; 01882 av_update_cur_dts(s, st, st->index_entries[index].timestamp); 01883 return 0; 01884 } 01885 01886 static int matroska_read_close(AVFormatContext *s) 01887 { 01888 MatroskaDemuxContext *matroska = s->priv_data; 01889 MatroskaTrack *tracks = matroska->tracks.elem; 01890 int n; 01891 01892 matroska_clear_queue(matroska); 01893 01894 for (n=0; n < matroska->tracks.nb_elem; n++) 01895 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO) 01896 av_free(tracks[n].audio.buf); 01897 ebml_free(matroska_segment, matroska); 01898 01899 return 0; 01900 } 01901 01902 AVInputFormat matroska_demuxer = { 01903 "matroska", 01904 NULL_IF_CONFIG_SMALL("Matroska file format"), 01905 sizeof(MatroskaDemuxContext), 01906 matroska_probe, 01907 matroska_read_header, 01908 matroska_read_packet, 01909 matroska_read_close, 01910 matroska_read_seek, 01911 .metadata_conv = ff_mkv_metadata_conv, 01912 };