Libav 0.7.1
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00001 /* 00002 * Matroska file demuxer 00003 * Copyright (c) 2003-2008 The Libav Project 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; 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 #include "avio_internal.h" 00035 /* For ff_codec_get_id(). */ 00036 #include "riff.h" 00037 #include "isom.h" 00038 #include "rm.h" 00039 #include "matroska.h" 00040 #include "libavcodec/mpeg4audio.h" 00041 #include "libavutil/intfloat_readwrite.h" 00042 #include "libavutil/intreadwrite.h" 00043 #include "libavutil/avstring.h" 00044 #include "libavutil/lzo.h" 00045 #include "libavutil/dict.h" 00046 #if CONFIG_ZLIB 00047 #include <zlib.h> 00048 #endif 00049 #if CONFIG_BZLIB 00050 #include <bzlib.h> 00051 #endif 00052 00053 typedef enum { 00054 EBML_NONE, 00055 EBML_UINT, 00056 EBML_FLOAT, 00057 EBML_STR, 00058 EBML_UTF8, 00059 EBML_BIN, 00060 EBML_NEST, 00061 EBML_PASS, 00062 EBML_STOP, 00063 EBML_TYPE_COUNT 00064 } EbmlType; 00065 00066 typedef const struct EbmlSyntax { 00067 uint32_t id; 00068 EbmlType type; 00069 int list_elem_size; 00070 int data_offset; 00071 union { 00072 uint64_t u; 00073 double f; 00074 const char *s; 00075 const struct EbmlSyntax *n; 00076 } def; 00077 } EbmlSyntax; 00078 00079 typedef struct { 00080 int nb_elem; 00081 void *elem; 00082 } EbmlList; 00083 00084 typedef struct { 00085 int size; 00086 uint8_t *data; 00087 int64_t pos; 00088 } EbmlBin; 00089 00090 typedef struct { 00091 uint64_t version; 00092 uint64_t max_size; 00093 uint64_t id_length; 00094 char *doctype; 00095 uint64_t doctype_version; 00096 } Ebml; 00097 00098 typedef struct { 00099 uint64_t algo; 00100 EbmlBin settings; 00101 } MatroskaTrackCompression; 00102 00103 typedef struct { 00104 uint64_t scope; 00105 uint64_t type; 00106 MatroskaTrackCompression compression; 00107 } MatroskaTrackEncoding; 00108 00109 typedef struct { 00110 double frame_rate; 00111 uint64_t display_width; 00112 uint64_t display_height; 00113 uint64_t pixel_width; 00114 uint64_t pixel_height; 00115 uint64_t fourcc; 00116 } MatroskaTrackVideo; 00117 00118 typedef struct { 00119 double samplerate; 00120 double out_samplerate; 00121 uint64_t bitdepth; 00122 uint64_t channels; 00123 00124 /* real audio header (extracted from extradata) */ 00125 int coded_framesize; 00126 int sub_packet_h; 00127 int frame_size; 00128 int sub_packet_size; 00129 int sub_packet_cnt; 00130 int pkt_cnt; 00131 uint64_t buf_timecode; 00132 uint8_t *buf; 00133 } MatroskaTrackAudio; 00134 00135 typedef struct { 00136 uint64_t num; 00137 uint64_t uid; 00138 uint64_t type; 00139 char *name; 00140 char *codec_id; 00141 EbmlBin codec_priv; 00142 char *language; 00143 double time_scale; 00144 uint64_t default_duration; 00145 uint64_t flag_default; 00146 uint64_t flag_forced; 00147 MatroskaTrackVideo video; 00148 MatroskaTrackAudio audio; 00149 EbmlList encodings; 00150 00151 AVStream *stream; 00152 int64_t end_timecode; 00153 int ms_compat; 00154 } MatroskaTrack; 00155 00156 typedef struct { 00157 uint64_t uid; 00158 char *filename; 00159 char *mime; 00160 EbmlBin bin; 00161 00162 AVStream *stream; 00163 } MatroskaAttachement; 00164 00165 typedef struct { 00166 uint64_t start; 00167 uint64_t end; 00168 uint64_t uid; 00169 char *title; 00170 00171 AVChapter *chapter; 00172 } MatroskaChapter; 00173 00174 typedef struct { 00175 uint64_t track; 00176 uint64_t pos; 00177 } MatroskaIndexPos; 00178 00179 typedef struct { 00180 uint64_t time; 00181 EbmlList pos; 00182 } MatroskaIndex; 00183 00184 typedef struct { 00185 char *name; 00186 char *string; 00187 char *lang; 00188 uint64_t def; 00189 EbmlList sub; 00190 } MatroskaTag; 00191 00192 typedef struct { 00193 char *type; 00194 uint64_t typevalue; 00195 uint64_t trackuid; 00196 uint64_t chapteruid; 00197 uint64_t attachuid; 00198 } MatroskaTagTarget; 00199 00200 typedef struct { 00201 MatroskaTagTarget target; 00202 EbmlList tag; 00203 } MatroskaTags; 00204 00205 typedef struct { 00206 uint64_t id; 00207 uint64_t pos; 00208 } MatroskaSeekhead; 00209 00210 typedef struct { 00211 uint64_t start; 00212 uint64_t length; 00213 } MatroskaLevel; 00214 00215 typedef struct { 00216 AVFormatContext *ctx; 00217 00218 /* EBML stuff */ 00219 int num_levels; 00220 MatroskaLevel levels[EBML_MAX_DEPTH]; 00221 int level_up; 00222 uint32_t current_id; 00223 00224 uint64_t time_scale; 00225 double duration; 00226 char *title; 00227 EbmlList tracks; 00228 EbmlList attachments; 00229 EbmlList chapters; 00230 EbmlList index; 00231 EbmlList tags; 00232 EbmlList seekhead; 00233 00234 /* byte position of the segment inside the stream */ 00235 int64_t segment_start; 00236 00237 /* the packet queue */ 00238 AVPacket **packets; 00239 int num_packets; 00240 AVPacket *prev_pkt; 00241 00242 int done; 00243 00244 /* What to skip before effectively reading a packet. */ 00245 int skip_to_keyframe; 00246 uint64_t skip_to_timecode; 00247 } MatroskaDemuxContext; 00248 00249 typedef struct { 00250 uint64_t duration; 00251 int64_t reference; 00252 uint64_t non_simple; 00253 EbmlBin bin; 00254 } MatroskaBlock; 00255 00256 typedef struct { 00257 uint64_t timecode; 00258 EbmlList blocks; 00259 } MatroskaCluster; 00260 00261 static EbmlSyntax ebml_header[] = { 00262 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} }, 00263 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} }, 00264 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} }, 00265 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} }, 00266 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} }, 00267 { EBML_ID_EBMLVERSION, EBML_NONE }, 00268 { EBML_ID_DOCTYPEVERSION, EBML_NONE }, 00269 { 0 } 00270 }; 00271 00272 static EbmlSyntax ebml_syntax[] = { 00273 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} }, 00274 { 0 } 00275 }; 00276 00277 static EbmlSyntax matroska_info[] = { 00278 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} }, 00279 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) }, 00280 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) }, 00281 { MATROSKA_ID_WRITINGAPP, EBML_NONE }, 00282 { MATROSKA_ID_MUXINGAPP, EBML_NONE }, 00283 { MATROSKA_ID_DATEUTC, EBML_NONE }, 00284 { MATROSKA_ID_SEGMENTUID, EBML_NONE }, 00285 { 0 } 00286 }; 00287 00288 static EbmlSyntax matroska_track_video[] = { 00289 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) }, 00290 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) }, 00291 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) }, 00292 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) }, 00293 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) }, 00294 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) }, 00295 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE }, 00296 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE }, 00297 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE }, 00298 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE }, 00299 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE }, 00300 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE }, 00301 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE }, 00302 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE }, 00303 { 0 } 00304 }; 00305 00306 static EbmlSyntax matroska_track_audio[] = { 00307 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} }, 00308 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) }, 00309 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) }, 00310 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} }, 00311 { 0 } 00312 }; 00313 00314 static EbmlSyntax matroska_track_encoding_compression[] = { 00315 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} }, 00316 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) }, 00317 { 0 } 00318 }; 00319 00320 static EbmlSyntax matroska_track_encoding[] = { 00321 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} }, 00322 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} }, 00323 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} }, 00324 { MATROSKA_ID_ENCODINGORDER, EBML_NONE }, 00325 { 0 } 00326 }; 00327 00328 static EbmlSyntax matroska_track_encodings[] = { 00329 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} }, 00330 { 0 } 00331 }; 00332 00333 static EbmlSyntax matroska_track[] = { 00334 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) }, 00335 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) }, 00336 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) }, 00337 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) }, 00338 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) }, 00339 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) }, 00340 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} }, 00341 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) }, 00342 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} }, 00343 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} }, 00344 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} }, 00345 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} }, 00346 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} }, 00347 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} }, 00348 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE }, 00349 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE }, 00350 { MATROSKA_ID_CODECNAME, EBML_NONE }, 00351 { MATROSKA_ID_CODECDECODEALL, EBML_NONE }, 00352 { MATROSKA_ID_CODECINFOURL, EBML_NONE }, 00353 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE }, 00354 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE }, 00355 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE }, 00356 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE }, 00357 { 0 } 00358 }; 00359 00360 static EbmlSyntax matroska_tracks[] = { 00361 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} }, 00362 { 0 } 00363 }; 00364 00365 static EbmlSyntax matroska_attachment[] = { 00366 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) }, 00367 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) }, 00368 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) }, 00369 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) }, 00370 { MATROSKA_ID_FILEDESC, EBML_NONE }, 00371 { 0 } 00372 }; 00373 00374 static EbmlSyntax matroska_attachments[] = { 00375 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} }, 00376 { 0 } 00377 }; 00378 00379 static EbmlSyntax matroska_chapter_display[] = { 00380 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) }, 00381 { MATROSKA_ID_CHAPLANG, EBML_NONE }, 00382 { 0 } 00383 }; 00384 00385 static EbmlSyntax matroska_chapter_entry[] = { 00386 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} }, 00387 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} }, 00388 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) }, 00389 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} }, 00390 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE }, 00391 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE }, 00392 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE }, 00393 { MATROSKA_ID_CHAPTERATOM, EBML_NONE }, 00394 { 0 } 00395 }; 00396 00397 static EbmlSyntax matroska_chapter[] = { 00398 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} }, 00399 { MATROSKA_ID_EDITIONUID, EBML_NONE }, 00400 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE }, 00401 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE }, 00402 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE }, 00403 { 0 } 00404 }; 00405 00406 static EbmlSyntax matroska_chapters[] = { 00407 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} }, 00408 { 0 } 00409 }; 00410 00411 static EbmlSyntax matroska_index_pos[] = { 00412 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) }, 00413 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) }, 00414 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE }, 00415 { 0 } 00416 }; 00417 00418 static EbmlSyntax matroska_index_entry[] = { 00419 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) }, 00420 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} }, 00421 { 0 } 00422 }; 00423 00424 static EbmlSyntax matroska_index[] = { 00425 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} }, 00426 { 0 } 00427 }; 00428 00429 static EbmlSyntax matroska_simpletag[] = { 00430 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) }, 00431 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) }, 00432 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} }, 00433 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) }, 00434 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) }, 00435 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} }, 00436 { 0 } 00437 }; 00438 00439 static EbmlSyntax matroska_tagtargets[] = { 00440 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) }, 00441 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} }, 00442 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) }, 00443 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) }, 00444 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) }, 00445 { 0 } 00446 }; 00447 00448 static EbmlSyntax matroska_tag[] = { 00449 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} }, 00450 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} }, 00451 { 0 } 00452 }; 00453 00454 static EbmlSyntax matroska_tags[] = { 00455 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} }, 00456 { 0 } 00457 }; 00458 00459 static EbmlSyntax matroska_seekhead_entry[] = { 00460 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) }, 00461 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} }, 00462 { 0 } 00463 }; 00464 00465 static EbmlSyntax matroska_seekhead[] = { 00466 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} }, 00467 { 0 } 00468 }; 00469 00470 static EbmlSyntax matroska_segment[] = { 00471 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } }, 00472 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } }, 00473 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} }, 00474 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } }, 00475 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } }, 00476 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } }, 00477 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } }, 00478 { MATROSKA_ID_CLUSTER, EBML_STOP }, 00479 { 0 } 00480 }; 00481 00482 static EbmlSyntax matroska_segments[] = { 00483 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } }, 00484 { 0 } 00485 }; 00486 00487 static EbmlSyntax matroska_blockgroup[] = { 00488 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, 00489 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, 00490 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} }, 00491 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) }, 00492 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} }, 00493 { 0 } 00494 }; 00495 00496 static EbmlSyntax matroska_cluster[] = { 00497 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) }, 00498 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} }, 00499 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} }, 00500 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE }, 00501 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE }, 00502 { 0 } 00503 }; 00504 00505 static EbmlSyntax matroska_clusters[] = { 00506 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} }, 00507 { MATROSKA_ID_INFO, EBML_NONE }, 00508 { MATROSKA_ID_CUES, EBML_NONE }, 00509 { MATROSKA_ID_TAGS, EBML_NONE }, 00510 { MATROSKA_ID_SEEKHEAD, EBML_NONE }, 00511 { 0 } 00512 }; 00513 00514 static const char *matroska_doctypes[] = { "matroska", "webm" }; 00515 00516 /* 00517 * Return: Whether we reached the end of a level in the hierarchy or not. 00518 */ 00519 static int ebml_level_end(MatroskaDemuxContext *matroska) 00520 { 00521 AVIOContext *pb = matroska->ctx->pb; 00522 int64_t pos = avio_tell(pb); 00523 00524 if (matroska->num_levels > 0) { 00525 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1]; 00526 if (pos - level->start >= level->length || matroska->current_id) { 00527 matroska->num_levels--; 00528 return 1; 00529 } 00530 } 00531 return 0; 00532 } 00533 00534 /* 00535 * Read: an "EBML number", which is defined as a variable-length 00536 * array of bytes. The first byte indicates the length by giving a 00537 * number of 0-bits followed by a one. The position of the first 00538 * "one" bit inside the first byte indicates the length of this 00539 * number. 00540 * Returns: number of bytes read, < 0 on error 00541 */ 00542 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, 00543 int max_size, uint64_t *number) 00544 { 00545 int read = 1, n = 1; 00546 uint64_t total = 0; 00547 00548 /* The first byte tells us the length in bytes - avio_r8() can normally 00549 * return 0, but since that's not a valid first ebmlID byte, we can 00550 * use it safely here to catch EOS. */ 00551 if (!(total = avio_r8(pb))) { 00552 /* we might encounter EOS here */ 00553 if (!pb->eof_reached) { 00554 int64_t pos = avio_tell(pb); 00555 av_log(matroska->ctx, AV_LOG_ERROR, 00556 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", 00557 pos, pos); 00558 } 00559 return AVERROR(EIO); /* EOS or actual I/O error */ 00560 } 00561 00562 /* get the length of the EBML number */ 00563 read = 8 - ff_log2_tab[total]; 00564 if (read > max_size) { 00565 int64_t pos = avio_tell(pb) - 1; 00566 av_log(matroska->ctx, AV_LOG_ERROR, 00567 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", 00568 (uint8_t) total, pos, pos); 00569 return AVERROR_INVALIDDATA; 00570 } 00571 00572 /* read out length */ 00573 total ^= 1 << ff_log2_tab[total]; 00574 while (n++ < read) 00575 total = (total << 8) | avio_r8(pb); 00576 00577 *number = total; 00578 00579 return read; 00580 } 00581 00587 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, 00588 uint64_t *number) 00589 { 00590 int res = ebml_read_num(matroska, pb, 8, number); 00591 if (res > 0 && *number + 1 == 1ULL << (7 * res)) 00592 *number = 0xffffffffffffffULL; 00593 return res; 00594 } 00595 00596 /* 00597 * Read the next element as an unsigned int. 00598 * 0 is success, < 0 is failure. 00599 */ 00600 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num) 00601 { 00602 int n = 0; 00603 00604 if (size > 8) 00605 return AVERROR_INVALIDDATA; 00606 00607 /* big-endian ordering; build up number */ 00608 *num = 0; 00609 while (n++ < size) 00610 *num = (*num << 8) | avio_r8(pb); 00611 00612 return 0; 00613 } 00614 00615 /* 00616 * Read the next element as a float. 00617 * 0 is success, < 0 is failure. 00618 */ 00619 static int ebml_read_float(AVIOContext *pb, int size, double *num) 00620 { 00621 if (size == 0) { 00622 *num = 0; 00623 } else if (size == 4) { 00624 *num= av_int2flt(avio_rb32(pb)); 00625 } else if(size==8){ 00626 *num= av_int2dbl(avio_rb64(pb)); 00627 } else 00628 return AVERROR_INVALIDDATA; 00629 00630 return 0; 00631 } 00632 00633 /* 00634 * Read the next element as an ASCII string. 00635 * 0 is success, < 0 is failure. 00636 */ 00637 static int ebml_read_ascii(AVIOContext *pb, int size, char **str) 00638 { 00639 char *res; 00640 00641 /* EBML strings are usually not 0-terminated, so we allocate one 00642 * byte more, read the string and NULL-terminate it ourselves. */ 00643 if (!(res = av_malloc(size + 1))) 00644 return AVERROR(ENOMEM); 00645 if (avio_read(pb, (uint8_t *) res, size) != size) { 00646 av_free(res); 00647 return AVERROR(EIO); 00648 } 00649 (res)[size] = '\0'; 00650 av_free(*str); 00651 *str = res; 00652 00653 return 0; 00654 } 00655 00656 /* 00657 * Read the next element as binary data. 00658 * 0 is success, < 0 is failure. 00659 */ 00660 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin) 00661 { 00662 av_free(bin->data); 00663 if (!(bin->data = av_malloc(length))) 00664 return AVERROR(ENOMEM); 00665 00666 bin->size = length; 00667 bin->pos = avio_tell(pb); 00668 if (avio_read(pb, bin->data, length) != length) { 00669 av_freep(&bin->data); 00670 return AVERROR(EIO); 00671 } 00672 00673 return 0; 00674 } 00675 00676 /* 00677 * Read the next element, but only the header. The contents 00678 * are supposed to be sub-elements which can be read separately. 00679 * 0 is success, < 0 is failure. 00680 */ 00681 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length) 00682 { 00683 AVIOContext *pb = matroska->ctx->pb; 00684 MatroskaLevel *level; 00685 00686 if (matroska->num_levels >= EBML_MAX_DEPTH) { 00687 av_log(matroska->ctx, AV_LOG_ERROR, 00688 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH); 00689 return AVERROR(ENOSYS); 00690 } 00691 00692 level = &matroska->levels[matroska->num_levels++]; 00693 level->start = avio_tell(pb); 00694 level->length = length; 00695 00696 return 0; 00697 } 00698 00699 /* 00700 * Read signed/unsigned "EBML" numbers. 00701 * Return: number of bytes processed, < 0 on error 00702 */ 00703 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, 00704 uint8_t *data, uint32_t size, uint64_t *num) 00705 { 00706 AVIOContext pb; 00707 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL); 00708 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num); 00709 } 00710 00711 /* 00712 * Same as above, but signed. 00713 */ 00714 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, 00715 uint8_t *data, uint32_t size, int64_t *num) 00716 { 00717 uint64_t unum; 00718 int res; 00719 00720 /* read as unsigned number first */ 00721 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0) 00722 return res; 00723 00724 /* make signed (weird way) */ 00725 *num = unum - ((1LL << (7*res - 1)) - 1); 00726 00727 return res; 00728 } 00729 00730 static int ebml_parse_elem(MatroskaDemuxContext *matroska, 00731 EbmlSyntax *syntax, void *data); 00732 00733 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00734 uint32_t id, void *data) 00735 { 00736 int i; 00737 for (i=0; syntax[i].id; i++) 00738 if (id == syntax[i].id) 00739 break; 00740 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER && 00741 matroska->num_levels > 0 && 00742 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff) 00743 return 0; // we reached the end of an unknown size cluster 00744 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) 00745 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id); 00746 return ebml_parse_elem(matroska, &syntax[i], data); 00747 } 00748 00749 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00750 void *data) 00751 { 00752 if (!matroska->current_id) { 00753 uint64_t id; 00754 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id); 00755 if (res < 0) 00756 return res; 00757 matroska->current_id = id | 1 << 7*res; 00758 } 00759 return ebml_parse_id(matroska, syntax, matroska->current_id, data); 00760 } 00761 00762 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00763 void *data) 00764 { 00765 int i, res = 0; 00766 00767 for (i=0; syntax[i].id; i++) 00768 switch (syntax[i].type) { 00769 case EBML_UINT: 00770 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u; 00771 break; 00772 case EBML_FLOAT: 00773 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f; 00774 break; 00775 case EBML_STR: 00776 case EBML_UTF8: 00777 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s); 00778 break; 00779 } 00780 00781 while (!res && !ebml_level_end(matroska)) 00782 res = ebml_parse(matroska, syntax, data); 00783 00784 return res; 00785 } 00786 00787 static int ebml_parse_elem(MatroskaDemuxContext *matroska, 00788 EbmlSyntax *syntax, void *data) 00789 { 00790 static const uint64_t max_lengths[EBML_TYPE_COUNT] = { 00791 [EBML_UINT] = 8, 00792 [EBML_FLOAT] = 8, 00793 // max. 16 MB for strings 00794 [EBML_STR] = 0x1000000, 00795 [EBML_UTF8] = 0x1000000, 00796 // max. 256 MB for binary data 00797 [EBML_BIN] = 0x10000000, 00798 // no limits for anything else 00799 }; 00800 AVIOContext *pb = matroska->ctx->pb; 00801 uint32_t id = syntax->id; 00802 uint64_t length; 00803 int res; 00804 void *newelem; 00805 00806 data = (char *)data + syntax->data_offset; 00807 if (syntax->list_elem_size) { 00808 EbmlList *list = data; 00809 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size); 00810 if (!newelem) 00811 return AVERROR(ENOMEM); 00812 list->elem = newelem; 00813 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size; 00814 memset(data, 0, syntax->list_elem_size); 00815 list->nb_elem++; 00816 } 00817 00818 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) { 00819 matroska->current_id = 0; 00820 if ((res = ebml_read_length(matroska, pb, &length)) < 0) 00821 return res; 00822 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) { 00823 av_log(matroska->ctx, AV_LOG_ERROR, 00824 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n", 00825 length, max_lengths[syntax->type], syntax->type); 00826 return AVERROR_INVALIDDATA; 00827 } 00828 } 00829 00830 switch (syntax->type) { 00831 case EBML_UINT: res = ebml_read_uint (pb, length, data); break; 00832 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break; 00833 case EBML_STR: 00834 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break; 00835 case EBML_BIN: res = ebml_read_binary(pb, length, data); break; 00836 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0) 00837 return res; 00838 if (id == MATROSKA_ID_SEGMENT) 00839 matroska->segment_start = avio_tell(matroska->ctx->pb); 00840 return ebml_parse_nest(matroska, syntax->def.n, data); 00841 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data); 00842 case EBML_STOP: return 1; 00843 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0; 00844 } 00845 if (res == AVERROR_INVALIDDATA) 00846 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n"); 00847 else if (res == AVERROR(EIO)) 00848 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n"); 00849 return res; 00850 } 00851 00852 static void ebml_free(EbmlSyntax *syntax, void *data) 00853 { 00854 int i, j; 00855 for (i=0; syntax[i].id; i++) { 00856 void *data_off = (char *)data + syntax[i].data_offset; 00857 switch (syntax[i].type) { 00858 case EBML_STR: 00859 case EBML_UTF8: av_freep(data_off); break; 00860 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break; 00861 case EBML_NEST: 00862 if (syntax[i].list_elem_size) { 00863 EbmlList *list = data_off; 00864 char *ptr = list->elem; 00865 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size) 00866 ebml_free(syntax[i].def.n, ptr); 00867 av_free(list->elem); 00868 } else 00869 ebml_free(syntax[i].def.n, data_off); 00870 default: break; 00871 } 00872 } 00873 } 00874 00875 00876 /* 00877 * Autodetecting... 00878 */ 00879 static int matroska_probe(AVProbeData *p) 00880 { 00881 uint64_t total = 0; 00882 int len_mask = 0x80, size = 1, n = 1, i; 00883 00884 /* EBML header? */ 00885 if (AV_RB32(p->buf) != EBML_ID_HEADER) 00886 return 0; 00887 00888 /* length of header */ 00889 total = p->buf[4]; 00890 while (size <= 8 && !(total & len_mask)) { 00891 size++; 00892 len_mask >>= 1; 00893 } 00894 if (size > 8) 00895 return 0; 00896 total &= (len_mask - 1); 00897 while (n < size) 00898 total = (total << 8) | p->buf[4 + n++]; 00899 00900 /* Does the probe data contain the whole header? */ 00901 if (p->buf_size < 4 + size + total) 00902 return 0; 00903 00904 /* The header should contain a known document type. For now, 00905 * we don't parse the whole header but simply check for the 00906 * availability of that array of characters inside the header. 00907 * Not fully fool-proof, but good enough. */ 00908 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) { 00909 int probelen = strlen(matroska_doctypes[i]); 00910 if (total < probelen) 00911 continue; 00912 for (n = 4+size; n <= 4+size+total-probelen; n++) 00913 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen)) 00914 return AVPROBE_SCORE_MAX; 00915 } 00916 00917 // probably valid EBML header but no recognized doctype 00918 return AVPROBE_SCORE_MAX/2; 00919 } 00920 00921 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska, 00922 int num) 00923 { 00924 MatroskaTrack *tracks = matroska->tracks.elem; 00925 int i; 00926 00927 for (i=0; i < matroska->tracks.nb_elem; i++) 00928 if (tracks[i].num == num) 00929 return &tracks[i]; 00930 00931 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num); 00932 return NULL; 00933 } 00934 00935 static int matroska_decode_buffer(uint8_t** buf, int* buf_size, 00936 MatroskaTrack *track) 00937 { 00938 MatroskaTrackEncoding *encodings = track->encodings.elem; 00939 uint8_t* data = *buf; 00940 int isize = *buf_size; 00941 uint8_t* pkt_data = NULL; 00942 uint8_t* newpktdata; 00943 int pkt_size = isize; 00944 int result = 0; 00945 int olen; 00946 00947 if (pkt_size >= 10000000) 00948 return -1; 00949 00950 switch (encodings[0].compression.algo) { 00951 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: 00952 return encodings[0].compression.settings.size; 00953 case MATROSKA_TRACK_ENCODING_COMP_LZO: 00954 do { 00955 olen = pkt_size *= 3; 00956 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING); 00957 result = av_lzo1x_decode(pkt_data, &olen, data, &isize); 00958 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000); 00959 if (result) 00960 goto failed; 00961 pkt_size -= olen; 00962 break; 00963 #if CONFIG_ZLIB 00964 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { 00965 z_stream zstream = {0}; 00966 if (inflateInit(&zstream) != Z_OK) 00967 return -1; 00968 zstream.next_in = data; 00969 zstream.avail_in = isize; 00970 do { 00971 pkt_size *= 3; 00972 newpktdata = av_realloc(pkt_data, pkt_size); 00973 if (!newpktdata) { 00974 inflateEnd(&zstream); 00975 goto failed; 00976 } 00977 pkt_data = newpktdata; 00978 zstream.avail_out = pkt_size - zstream.total_out; 00979 zstream.next_out = pkt_data + zstream.total_out; 00980 result = inflate(&zstream, Z_NO_FLUSH); 00981 } while (result==Z_OK && pkt_size<10000000); 00982 pkt_size = zstream.total_out; 00983 inflateEnd(&zstream); 00984 if (result != Z_STREAM_END) 00985 goto failed; 00986 break; 00987 } 00988 #endif 00989 #if CONFIG_BZLIB 00990 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { 00991 bz_stream bzstream = {0}; 00992 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) 00993 return -1; 00994 bzstream.next_in = data; 00995 bzstream.avail_in = isize; 00996 do { 00997 pkt_size *= 3; 00998 newpktdata = av_realloc(pkt_data, pkt_size); 00999 if (!newpktdata) { 01000 BZ2_bzDecompressEnd(&bzstream); 01001 goto failed; 01002 } 01003 pkt_data = newpktdata; 01004 bzstream.avail_out = pkt_size - bzstream.total_out_lo32; 01005 bzstream.next_out = pkt_data + bzstream.total_out_lo32; 01006 result = BZ2_bzDecompress(&bzstream); 01007 } while (result==BZ_OK && pkt_size<10000000); 01008 pkt_size = bzstream.total_out_lo32; 01009 BZ2_bzDecompressEnd(&bzstream); 01010 if (result != BZ_STREAM_END) 01011 goto failed; 01012 break; 01013 } 01014 #endif 01015 default: 01016 return -1; 01017 } 01018 01019 *buf = pkt_data; 01020 *buf_size = pkt_size; 01021 return 0; 01022 failed: 01023 av_free(pkt_data); 01024 return -1; 01025 } 01026 01027 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, 01028 AVPacket *pkt, uint64_t display_duration) 01029 { 01030 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size; 01031 for (; *ptr!=',' && ptr<end-1; ptr++); 01032 if (*ptr == ',') 01033 layer = ++ptr; 01034 for (; *ptr!=',' && ptr<end-1; ptr++); 01035 if (*ptr == ',') { 01036 int64_t end_pts = pkt->pts + display_duration; 01037 int sc = matroska->time_scale * pkt->pts / 10000000; 01038 int ec = matroska->time_scale * end_pts / 10000000; 01039 int sh, sm, ss, eh, em, es, len; 01040 sh = sc/360000; sc -= 360000*sh; 01041 sm = sc/ 6000; sc -= 6000*sm; 01042 ss = sc/ 100; sc -= 100*ss; 01043 eh = ec/360000; ec -= 360000*eh; 01044 em = ec/ 6000; ec -= 6000*em; 01045 es = ec/ 100; ec -= 100*es; 01046 *ptr++ = '\0'; 01047 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE; 01048 if (!(line = av_malloc(len))) 01049 return; 01050 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n", 01051 layer, sh, sm, ss, sc, eh, em, es, ec, ptr); 01052 av_free(pkt->data); 01053 pkt->data = line; 01054 pkt->size = strlen(line); 01055 } 01056 } 01057 01058 static int matroska_merge_packets(AVPacket *out, AVPacket *in) 01059 { 01060 void *newdata = av_realloc(out->data, out->size+in->size); 01061 if (!newdata) 01062 return AVERROR(ENOMEM); 01063 out->data = newdata; 01064 memcpy(out->data+out->size, in->data, in->size); 01065 out->size += in->size; 01066 av_destruct_packet(in); 01067 av_free(in); 01068 return 0; 01069 } 01070 01071 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, 01072 AVDictionary **metadata, char *prefix) 01073 { 01074 MatroskaTag *tags = list->elem; 01075 char key[1024]; 01076 int i; 01077 01078 for (i=0; i < list->nb_elem; i++) { 01079 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL; 01080 01081 if (!tags[i].name) { 01082 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n"); 01083 continue; 01084 } 01085 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name); 01086 else av_strlcpy(key, tags[i].name, sizeof(key)); 01087 if (tags[i].def || !lang) { 01088 av_dict_set(metadata, key, tags[i].string, 0); 01089 if (tags[i].sub.nb_elem) 01090 matroska_convert_tag(s, &tags[i].sub, metadata, key); 01091 } 01092 if (lang) { 01093 av_strlcat(key, "-", sizeof(key)); 01094 av_strlcat(key, lang, sizeof(key)); 01095 av_dict_set(metadata, key, tags[i].string, 0); 01096 if (tags[i].sub.nb_elem) 01097 matroska_convert_tag(s, &tags[i].sub, metadata, key); 01098 } 01099 } 01100 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv); 01101 } 01102 01103 static void matroska_convert_tags(AVFormatContext *s) 01104 { 01105 MatroskaDemuxContext *matroska = s->priv_data; 01106 MatroskaTags *tags = matroska->tags.elem; 01107 int i, j; 01108 01109 for (i=0; i < matroska->tags.nb_elem; i++) { 01110 if (tags[i].target.attachuid) { 01111 MatroskaAttachement *attachment = matroska->attachments.elem; 01112 for (j=0; j<matroska->attachments.nb_elem; j++) 01113 if (attachment[j].uid == tags[i].target.attachuid 01114 && attachment[j].stream) 01115 matroska_convert_tag(s, &tags[i].tag, 01116 &attachment[j].stream->metadata, NULL); 01117 } else if (tags[i].target.chapteruid) { 01118 MatroskaChapter *chapter = matroska->chapters.elem; 01119 for (j=0; j<matroska->chapters.nb_elem; j++) 01120 if (chapter[j].uid == tags[i].target.chapteruid 01121 && chapter[j].chapter) 01122 matroska_convert_tag(s, &tags[i].tag, 01123 &chapter[j].chapter->metadata, NULL); 01124 } else if (tags[i].target.trackuid) { 01125 MatroskaTrack *track = matroska->tracks.elem; 01126 for (j=0; j<matroska->tracks.nb_elem; j++) 01127 if (track[j].uid == tags[i].target.trackuid && track[j].stream) 01128 matroska_convert_tag(s, &tags[i].tag, 01129 &track[j].stream->metadata, NULL); 01130 } else { 01131 matroska_convert_tag(s, &tags[i].tag, &s->metadata, 01132 tags[i].target.type); 01133 } 01134 } 01135 } 01136 01137 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska) 01138 { 01139 EbmlList *seekhead_list = &matroska->seekhead; 01140 uint32_t level_up = matroska->level_up; 01141 int64_t before_pos = avio_tell(matroska->ctx->pb); 01142 uint32_t saved_id = matroska->current_id; 01143 MatroskaLevel level; 01144 int i; 01145 01146 // we should not do any seeking in the streaming case 01147 if (!matroska->ctx->pb->seekable || 01148 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)) 01149 return; 01150 01151 for (i=0; i<seekhead_list->nb_elem; i++) { 01152 MatroskaSeekhead *seekhead = seekhead_list->elem; 01153 int64_t offset = seekhead[i].pos + matroska->segment_start; 01154 01155 if (seekhead[i].pos <= before_pos 01156 || seekhead[i].id == MATROSKA_ID_SEEKHEAD 01157 || seekhead[i].id == MATROSKA_ID_CLUSTER) 01158 continue; 01159 01160 /* seek */ 01161 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) != offset) 01162 continue; 01163 01164 /* We don't want to lose our seekhead level, so we add 01165 * a dummy. This is a crude hack. */ 01166 if (matroska->num_levels == EBML_MAX_DEPTH) { 01167 av_log(matroska->ctx, AV_LOG_INFO, 01168 "Max EBML element depth (%d) reached, " 01169 "cannot parse further.\n", EBML_MAX_DEPTH); 01170 break; 01171 } 01172 01173 level.start = 0; 01174 level.length = (uint64_t)-1; 01175 matroska->levels[matroska->num_levels] = level; 01176 matroska->num_levels++; 01177 matroska->current_id = 0; 01178 01179 ebml_parse(matroska, matroska_segment, matroska); 01180 01181 /* remove dummy level */ 01182 while (matroska->num_levels) { 01183 uint64_t length = matroska->levels[--matroska->num_levels].length; 01184 if (length == (uint64_t)-1) 01185 break; 01186 } 01187 } 01188 01189 /* seek back */ 01190 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET); 01191 matroska->level_up = level_up; 01192 matroska->current_id = saved_id; 01193 } 01194 01195 static int matroska_aac_profile(char *codec_id) 01196 { 01197 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" }; 01198 int profile; 01199 01200 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++) 01201 if (strstr(codec_id, aac_profiles[profile])) 01202 break; 01203 return profile + 1; 01204 } 01205 01206 static int matroska_aac_sri(int samplerate) 01207 { 01208 int sri; 01209 01210 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++) 01211 if (ff_mpeg4audio_sample_rates[sri] == samplerate) 01212 break; 01213 return sri; 01214 } 01215 01216 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap) 01217 { 01218 MatroskaDemuxContext *matroska = s->priv_data; 01219 EbmlList *attachements_list = &matroska->attachments; 01220 MatroskaAttachement *attachements; 01221 EbmlList *chapters_list = &matroska->chapters; 01222 MatroskaChapter *chapters; 01223 MatroskaTrack *tracks; 01224 EbmlList *index_list; 01225 MatroskaIndex *index; 01226 int index_scale = 1; 01227 uint64_t max_start = 0; 01228 Ebml ebml = { 0 }; 01229 AVStream *st; 01230 int i, j, res; 01231 01232 matroska->ctx = s; 01233 01234 /* First read the EBML header. */ 01235 if (ebml_parse(matroska, ebml_syntax, &ebml) 01236 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t) 01237 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) { 01238 av_log(matroska->ctx, AV_LOG_ERROR, 01239 "EBML header using unsupported features\n" 01240 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", 01241 ebml.version, ebml.doctype, ebml.doctype_version); 01242 ebml_free(ebml_syntax, &ebml); 01243 return AVERROR_PATCHWELCOME; 01244 } 01245 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) 01246 if (!strcmp(ebml.doctype, matroska_doctypes[i])) 01247 break; 01248 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) { 01249 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype); 01250 } 01251 ebml_free(ebml_syntax, &ebml); 01252 01253 /* The next thing is a segment. */ 01254 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0) 01255 return res; 01256 matroska_execute_seekhead(matroska); 01257 01258 if (!matroska->time_scale) 01259 matroska->time_scale = 1000000; 01260 if (matroska->duration) 01261 matroska->ctx->duration = matroska->duration * matroska->time_scale 01262 * 1000 / AV_TIME_BASE; 01263 av_dict_set(&s->metadata, "title", matroska->title, 0); 01264 01265 tracks = matroska->tracks.elem; 01266 for (i=0; i < matroska->tracks.nb_elem; i++) { 01267 MatroskaTrack *track = &tracks[i]; 01268 enum CodecID codec_id = CODEC_ID_NONE; 01269 EbmlList *encodings_list = &tracks->encodings; 01270 MatroskaTrackEncoding *encodings = encodings_list->elem; 01271 uint8_t *extradata = NULL; 01272 int extradata_size = 0; 01273 int extradata_offset = 0; 01274 AVIOContext b; 01275 01276 /* Apply some sanity checks. */ 01277 if (track->type != MATROSKA_TRACK_TYPE_VIDEO && 01278 track->type != MATROSKA_TRACK_TYPE_AUDIO && 01279 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { 01280 av_log(matroska->ctx, AV_LOG_INFO, 01281 "Unknown or unsupported track type %"PRIu64"\n", 01282 track->type); 01283 continue; 01284 } 01285 if (track->codec_id == NULL) 01286 continue; 01287 01288 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { 01289 if (!track->default_duration) 01290 track->default_duration = 1000000000/track->video.frame_rate; 01291 if (!track->video.display_width) 01292 track->video.display_width = track->video.pixel_width; 01293 if (!track->video.display_height) 01294 track->video.display_height = track->video.pixel_height; 01295 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { 01296 if (!track->audio.out_samplerate) 01297 track->audio.out_samplerate = track->audio.samplerate; 01298 } 01299 if (encodings_list->nb_elem > 1) { 01300 av_log(matroska->ctx, AV_LOG_ERROR, 01301 "Multiple combined encodings no supported"); 01302 } else if (encodings_list->nb_elem == 1) { 01303 if (encodings[0].type || 01304 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && 01305 #if CONFIG_ZLIB 01306 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB && 01307 #endif 01308 #if CONFIG_BZLIB 01309 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB && 01310 #endif 01311 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) { 01312 encodings[0].scope = 0; 01313 av_log(matroska->ctx, AV_LOG_ERROR, 01314 "Unsupported encoding type"); 01315 } else if (track->codec_priv.size && encodings[0].scope&2) { 01316 uint8_t *codec_priv = track->codec_priv.data; 01317 int offset = matroska_decode_buffer(&track->codec_priv.data, 01318 &track->codec_priv.size, 01319 track); 01320 if (offset < 0) { 01321 track->codec_priv.data = NULL; 01322 track->codec_priv.size = 0; 01323 av_log(matroska->ctx, AV_LOG_ERROR, 01324 "Failed to decode codec private data\n"); 01325 } else if (offset > 0) { 01326 track->codec_priv.data = av_malloc(track->codec_priv.size + offset); 01327 memcpy(track->codec_priv.data, 01328 encodings[0].compression.settings.data, offset); 01329 memcpy(track->codec_priv.data+offset, codec_priv, 01330 track->codec_priv.size); 01331 track->codec_priv.size += offset; 01332 } 01333 if (codec_priv != track->codec_priv.data) 01334 av_free(codec_priv); 01335 } 01336 } 01337 01338 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ 01339 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, 01340 strlen(ff_mkv_codec_tags[j].str))){ 01341 codec_id= ff_mkv_codec_tags[j].id; 01342 break; 01343 } 01344 } 01345 01346 st = track->stream = av_new_stream(s, 0); 01347 if (st == NULL) 01348 return AVERROR(ENOMEM); 01349 01350 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") 01351 && track->codec_priv.size >= 40 01352 && track->codec_priv.data != NULL) { 01353 track->ms_compat = 1; 01354 track->video.fourcc = AV_RL32(track->codec_priv.data + 16); 01355 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc); 01356 extradata_offset = 40; 01357 } else if (!strcmp(track->codec_id, "A_MS/ACM") 01358 && track->codec_priv.size >= 14 01359 && track->codec_priv.data != NULL) { 01360 int ret; 01361 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size, 01362 AVIO_FLAG_READ, NULL, NULL, NULL, NULL); 01363 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size); 01364 if (ret < 0) 01365 return ret; 01366 codec_id = st->codec->codec_id; 01367 extradata_offset = FFMIN(track->codec_priv.size, 18); 01368 } else if (!strcmp(track->codec_id, "V_QUICKTIME") 01369 && (track->codec_priv.size >= 86) 01370 && (track->codec_priv.data != NULL)) { 01371 track->video.fourcc = AV_RL32(track->codec_priv.data); 01372 codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc); 01373 } else if (codec_id == CODEC_ID_PCM_S16BE) { 01374 switch (track->audio.bitdepth) { 01375 case 8: codec_id = CODEC_ID_PCM_U8; break; 01376 case 24: codec_id = CODEC_ID_PCM_S24BE; break; 01377 case 32: codec_id = CODEC_ID_PCM_S32BE; break; 01378 } 01379 } else if (codec_id == CODEC_ID_PCM_S16LE) { 01380 switch (track->audio.bitdepth) { 01381 case 8: codec_id = CODEC_ID_PCM_U8; break; 01382 case 24: codec_id = CODEC_ID_PCM_S24LE; break; 01383 case 32: codec_id = CODEC_ID_PCM_S32LE; break; 01384 } 01385 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) { 01386 codec_id = CODEC_ID_PCM_F64LE; 01387 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) { 01388 int profile = matroska_aac_profile(track->codec_id); 01389 int sri = matroska_aac_sri(track->audio.samplerate); 01390 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE); 01391 if (extradata == NULL) 01392 return AVERROR(ENOMEM); 01393 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); 01394 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3); 01395 if (strstr(track->codec_id, "SBR")) { 01396 sri = matroska_aac_sri(track->audio.out_samplerate); 01397 extradata[2] = 0x56; 01398 extradata[3] = 0xE5; 01399 extradata[4] = 0x80 | (sri<<3); 01400 extradata_size = 5; 01401 } else 01402 extradata_size = 2; 01403 } else if (codec_id == CODEC_ID_TTA) { 01404 extradata_size = 30; 01405 extradata = av_mallocz(extradata_size); 01406 if (extradata == NULL) 01407 return AVERROR(ENOMEM); 01408 ffio_init_context(&b, extradata, extradata_size, 1, 01409 NULL, NULL, NULL, NULL); 01410 avio_write(&b, "TTA1", 4); 01411 avio_wl16(&b, 1); 01412 avio_wl16(&b, track->audio.channels); 01413 avio_wl16(&b, track->audio.bitdepth); 01414 avio_wl32(&b, track->audio.out_samplerate); 01415 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate); 01416 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || 01417 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { 01418 extradata_offset = 26; 01419 } else if (codec_id == CODEC_ID_RA_144) { 01420 track->audio.out_samplerate = 8000; 01421 track->audio.channels = 1; 01422 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || 01423 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) { 01424 int flavor; 01425 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size, 01426 0, NULL, NULL, NULL, NULL); 01427 avio_skip(&b, 22); 01428 flavor = avio_rb16(&b); 01429 track->audio.coded_framesize = avio_rb32(&b); 01430 avio_skip(&b, 12); 01431 track->audio.sub_packet_h = avio_rb16(&b); 01432 track->audio.frame_size = avio_rb16(&b); 01433 track->audio.sub_packet_size = avio_rb16(&b); 01434 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h); 01435 if (codec_id == CODEC_ID_RA_288) { 01436 st->codec->block_align = track->audio.coded_framesize; 01437 track->codec_priv.size = 0; 01438 } else { 01439 if (codec_id == CODEC_ID_SIPR && flavor < 4) { 01440 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 }; 01441 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor]; 01442 st->codec->bit_rate = sipr_bit_rate[flavor]; 01443 } 01444 st->codec->block_align = track->audio.sub_packet_size; 01445 extradata_offset = 78; 01446 } 01447 } 01448 track->codec_priv.size -= extradata_offset; 01449 01450 if (codec_id == CODEC_ID_NONE) 01451 av_log(matroska->ctx, AV_LOG_INFO, 01452 "Unknown/unsupported CodecID %s.\n", track->codec_id); 01453 01454 if (track->time_scale < 0.01) 01455 track->time_scale = 1.0; 01456 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ 01457 01458 st->codec->codec_id = codec_id; 01459 st->start_time = 0; 01460 if (strcmp(track->language, "und")) 01461 av_dict_set(&st->metadata, "language", track->language, 0); 01462 av_dict_set(&st->metadata, "title", track->name, 0); 01463 01464 if (track->flag_default) 01465 st->disposition |= AV_DISPOSITION_DEFAULT; 01466 if (track->flag_forced) 01467 st->disposition |= AV_DISPOSITION_FORCED; 01468 01469 if (track->default_duration) 01470 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, 01471 track->default_duration, 1000000000, 30000); 01472 01473 if (!st->codec->extradata) { 01474 if(extradata){ 01475 st->codec->extradata = extradata; 01476 st->codec->extradata_size = extradata_size; 01477 } else if(track->codec_priv.data && track->codec_priv.size > 0){ 01478 st->codec->extradata = av_mallocz(track->codec_priv.size + 01479 FF_INPUT_BUFFER_PADDING_SIZE); 01480 if(st->codec->extradata == NULL) 01481 return AVERROR(ENOMEM); 01482 st->codec->extradata_size = track->codec_priv.size; 01483 memcpy(st->codec->extradata, 01484 track->codec_priv.data + extradata_offset, 01485 track->codec_priv.size); 01486 } 01487 } 01488 01489 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { 01490 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 01491 st->codec->codec_tag = track->video.fourcc; 01492 st->codec->width = track->video.pixel_width; 01493 st->codec->height = track->video.pixel_height; 01494 av_reduce(&st->sample_aspect_ratio.num, 01495 &st->sample_aspect_ratio.den, 01496 st->codec->height * track->video.display_width, 01497 st->codec-> width * track->video.display_height, 01498 255); 01499 if (st->codec->codec_id != CODEC_ID_H264) 01500 st->need_parsing = AVSTREAM_PARSE_HEADERS; 01501 if (track->default_duration) 01502 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX); 01503 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { 01504 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 01505 st->codec->sample_rate = track->audio.out_samplerate; 01506 st->codec->channels = track->audio.channels; 01507 if (st->codec->codec_id != CODEC_ID_AAC) 01508 st->need_parsing = AVSTREAM_PARSE_HEADERS; 01509 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { 01510 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; 01511 } 01512 } 01513 01514 attachements = attachements_list->elem; 01515 for (j=0; j<attachements_list->nb_elem; j++) { 01516 if (!(attachements[j].filename && attachements[j].mime && 01517 attachements[j].bin.data && attachements[j].bin.size > 0)) { 01518 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); 01519 } else { 01520 AVStream *st = av_new_stream(s, 0); 01521 if (st == NULL) 01522 break; 01523 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0); 01524 st->codec->codec_id = CODEC_ID_NONE; 01525 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; 01526 st->codec->extradata = av_malloc(attachements[j].bin.size); 01527 if(st->codec->extradata == NULL) 01528 break; 01529 st->codec->extradata_size = attachements[j].bin.size; 01530 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size); 01531 01532 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { 01533 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime, 01534 strlen(ff_mkv_mime_tags[i].str))) { 01535 st->codec->codec_id = ff_mkv_mime_tags[i].id; 01536 break; 01537 } 01538 } 01539 attachements[j].stream = st; 01540 } 01541 } 01542 01543 chapters = chapters_list->elem; 01544 for (i=0; i<chapters_list->nb_elem; i++) 01545 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid 01546 && (max_start==0 || chapters[i].start > max_start)) { 01547 chapters[i].chapter = 01548 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000}, 01549 chapters[i].start, chapters[i].end, 01550 chapters[i].title); 01551 av_dict_set(&chapters[i].chapter->metadata, 01552 "title", chapters[i].title, 0); 01553 max_start = chapters[i].start; 01554 } 01555 01556 index_list = &matroska->index; 01557 index = index_list->elem; 01558 if (index_list->nb_elem 01559 && index[0].time > 100000000000000/matroska->time_scale) { 01560 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n"); 01561 index_scale = matroska->time_scale; 01562 } 01563 for (i=0; i<index_list->nb_elem; i++) { 01564 EbmlList *pos_list = &index[i].pos; 01565 MatroskaIndexPos *pos = pos_list->elem; 01566 for (j=0; j<pos_list->nb_elem; j++) { 01567 MatroskaTrack *track = matroska_find_track_by_num(matroska, 01568 pos[j].track); 01569 if (track && track->stream) 01570 av_add_index_entry(track->stream, 01571 pos[j].pos + matroska->segment_start, 01572 index[i].time/index_scale, 0, 0, 01573 AVINDEX_KEYFRAME); 01574 } 01575 } 01576 01577 matroska_convert_tags(s); 01578 01579 return 0; 01580 } 01581 01582 /* 01583 * Put one packet in an application-supplied AVPacket struct. 01584 * Returns 0 on success or -1 on failure. 01585 */ 01586 static int matroska_deliver_packet(MatroskaDemuxContext *matroska, 01587 AVPacket *pkt) 01588 { 01589 if (matroska->num_packets > 0) { 01590 memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); 01591 av_free(matroska->packets[0]); 01592 if (matroska->num_packets > 1) { 01593 void *newpackets; 01594 memmove(&matroska->packets[0], &matroska->packets[1], 01595 (matroska->num_packets - 1) * sizeof(AVPacket *)); 01596 newpackets = av_realloc(matroska->packets, 01597 (matroska->num_packets - 1) * sizeof(AVPacket *)); 01598 if (newpackets) 01599 matroska->packets = newpackets; 01600 } else { 01601 av_freep(&matroska->packets); 01602 } 01603 matroska->num_packets--; 01604 return 0; 01605 } 01606 01607 return -1; 01608 } 01609 01610 /* 01611 * Free all packets in our internal queue. 01612 */ 01613 static void matroska_clear_queue(MatroskaDemuxContext *matroska) 01614 { 01615 if (matroska->packets) { 01616 int n; 01617 for (n = 0; n < matroska->num_packets; n++) { 01618 av_free_packet(matroska->packets[n]); 01619 av_free(matroska->packets[n]); 01620 } 01621 av_freep(&matroska->packets); 01622 matroska->num_packets = 0; 01623 } 01624 } 01625 01626 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, 01627 int size, int64_t pos, uint64_t cluster_time, 01628 uint64_t duration, int is_keyframe, 01629 int64_t cluster_pos) 01630 { 01631 uint64_t timecode = AV_NOPTS_VALUE; 01632 MatroskaTrack *track; 01633 int res = 0; 01634 AVStream *st; 01635 AVPacket *pkt; 01636 int16_t block_time; 01637 uint32_t *lace_size = NULL; 01638 int n, flags, laces = 0; 01639 uint64_t num; 01640 01641 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) { 01642 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); 01643 return res; 01644 } 01645 data += n; 01646 size -= n; 01647 01648 track = matroska_find_track_by_num(matroska, num); 01649 if (size <= 3 || !track || !track->stream) { 01650 av_log(matroska->ctx, AV_LOG_INFO, 01651 "Invalid stream %"PRIu64" or size %u\n", num, size); 01652 return res; 01653 } 01654 st = track->stream; 01655 if (st->discard >= AVDISCARD_ALL) 01656 return res; 01657 if (duration == AV_NOPTS_VALUE) 01658 duration = track->default_duration / matroska->time_scale; 01659 01660 block_time = AV_RB16(data); 01661 data += 2; 01662 flags = *data++; 01663 size -= 3; 01664 if (is_keyframe == -1) 01665 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0; 01666 01667 if (cluster_time != (uint64_t)-1 01668 && (block_time >= 0 || cluster_time >= -block_time)) { 01669 timecode = cluster_time + block_time; 01670 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE 01671 && timecode < track->end_timecode) 01672 is_keyframe = 0; /* overlapping subtitles are not key frame */ 01673 if (is_keyframe) 01674 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME); 01675 track->end_timecode = FFMAX(track->end_timecode, timecode+duration); 01676 } 01677 01678 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { 01679 if (!is_keyframe || timecode < matroska->skip_to_timecode) 01680 return res; 01681 matroska->skip_to_keyframe = 0; 01682 } 01683 01684 switch ((flags & 0x06) >> 1) { 01685 case 0x0: /* no lacing */ 01686 laces = 1; 01687 lace_size = av_mallocz(sizeof(int)); 01688 lace_size[0] = size; 01689 break; 01690 01691 case 0x1: /* Xiph lacing */ 01692 case 0x2: /* fixed-size lacing */ 01693 case 0x3: /* EBML lacing */ 01694 assert(size>0); // size <=3 is checked before size-=3 above 01695 laces = (*data) + 1; 01696 data += 1; 01697 size -= 1; 01698 lace_size = av_mallocz(laces * sizeof(int)); 01699 01700 switch ((flags & 0x06) >> 1) { 01701 case 0x1: /* Xiph lacing */ { 01702 uint8_t temp; 01703 uint32_t total = 0; 01704 for (n = 0; res == 0 && n < laces - 1; n++) { 01705 while (1) { 01706 if (size == 0) { 01707 res = -1; 01708 break; 01709 } 01710 temp = *data; 01711 lace_size[n] += temp; 01712 data += 1; 01713 size -= 1; 01714 if (temp != 0xff) 01715 break; 01716 } 01717 total += lace_size[n]; 01718 } 01719 lace_size[n] = size - total; 01720 break; 01721 } 01722 01723 case 0x2: /* fixed-size lacing */ 01724 for (n = 0; n < laces; n++) 01725 lace_size[n] = size / laces; 01726 break; 01727 01728 case 0x3: /* EBML lacing */ { 01729 uint32_t total; 01730 n = matroska_ebmlnum_uint(matroska, data, size, &num); 01731 if (n < 0) { 01732 av_log(matroska->ctx, AV_LOG_INFO, 01733 "EBML block data error\n"); 01734 break; 01735 } 01736 data += n; 01737 size -= n; 01738 total = lace_size[0] = num; 01739 for (n = 1; res == 0 && n < laces - 1; n++) { 01740 int64_t snum; 01741 int r; 01742 r = matroska_ebmlnum_sint(matroska, data, size, &snum); 01743 if (r < 0) { 01744 av_log(matroska->ctx, AV_LOG_INFO, 01745 "EBML block data error\n"); 01746 break; 01747 } 01748 data += r; 01749 size -= r; 01750 lace_size[n] = lace_size[n - 1] + snum; 01751 total += lace_size[n]; 01752 } 01753 lace_size[n] = size - total; 01754 break; 01755 } 01756 } 01757 break; 01758 } 01759 01760 if (res == 0) { 01761 for (n = 0; n < laces; n++) { 01762 if ((st->codec->codec_id == CODEC_ID_RA_288 || 01763 st->codec->codec_id == CODEC_ID_COOK || 01764 st->codec->codec_id == CODEC_ID_SIPR || 01765 st->codec->codec_id == CODEC_ID_ATRAC3) && 01766 st->codec->block_align && track->audio.sub_packet_size) { 01767 int a = st->codec->block_align; 01768 int sps = track->audio.sub_packet_size; 01769 int cfs = track->audio.coded_framesize; 01770 int h = track->audio.sub_packet_h; 01771 int y = track->audio.sub_packet_cnt; 01772 int w = track->audio.frame_size; 01773 int x; 01774 01775 if (!track->audio.pkt_cnt) { 01776 if (track->audio.sub_packet_cnt == 0) 01777 track->audio.buf_timecode = timecode; 01778 if (st->codec->codec_id == CODEC_ID_RA_288) { 01779 if (size < cfs * h / 2) { 01780 av_log(matroska->ctx, AV_LOG_ERROR, 01781 "Corrupt int4 RM-style audio packet size\n"); 01782 return AVERROR_INVALIDDATA; 01783 } 01784 for (x=0; x<h/2; x++) 01785 memcpy(track->audio.buf+x*2*w+y*cfs, 01786 data+x*cfs, cfs); 01787 } else if (st->codec->codec_id == CODEC_ID_SIPR) { 01788 if (size < w) { 01789 av_log(matroska->ctx, AV_LOG_ERROR, 01790 "Corrupt sipr RM-style audio packet size\n"); 01791 return AVERROR_INVALIDDATA; 01792 } 01793 memcpy(track->audio.buf + y*w, data, w); 01794 } else { 01795 if (size < sps * w / sps) { 01796 av_log(matroska->ctx, AV_LOG_ERROR, 01797 "Corrupt generic RM-style audio packet size\n"); 01798 return AVERROR_INVALIDDATA; 01799 } 01800 for (x=0; x<w/sps; x++) 01801 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); 01802 } 01803 01804 if (++track->audio.sub_packet_cnt >= h) { 01805 if (st->codec->codec_id == CODEC_ID_SIPR) 01806 ff_rm_reorder_sipr_data(track->audio.buf, h, w); 01807 track->audio.sub_packet_cnt = 0; 01808 track->audio.pkt_cnt = h*w / a; 01809 } 01810 } 01811 while (track->audio.pkt_cnt) { 01812 pkt = av_mallocz(sizeof(AVPacket)); 01813 av_new_packet(pkt, a); 01814 memcpy(pkt->data, track->audio.buf 01815 + a * (h*w / a - track->audio.pkt_cnt--), a); 01816 pkt->pts = track->audio.buf_timecode; 01817 track->audio.buf_timecode = AV_NOPTS_VALUE; 01818 pkt->pos = pos; 01819 pkt->stream_index = st->index; 01820 dynarray_add(&matroska->packets,&matroska->num_packets,pkt); 01821 } 01822 } else { 01823 MatroskaTrackEncoding *encodings = track->encodings.elem; 01824 int offset = 0, pkt_size = lace_size[n]; 01825 uint8_t *pkt_data = data; 01826 01827 if (pkt_size > size) { 01828 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n"); 01829 break; 01830 } 01831 01832 if (encodings && encodings->scope & 1) { 01833 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track); 01834 if (offset < 0) 01835 continue; 01836 } 01837 01838 pkt = av_mallocz(sizeof(AVPacket)); 01839 /* XXX: prevent data copy... */ 01840 if (av_new_packet(pkt, pkt_size+offset) < 0) { 01841 av_free(pkt); 01842 res = AVERROR(ENOMEM); 01843 break; 01844 } 01845 if (offset) 01846 memcpy (pkt->data, encodings->compression.settings.data, offset); 01847 memcpy (pkt->data+offset, pkt_data, pkt_size); 01848 01849 if (pkt_data != data) 01850 av_free(pkt_data); 01851 01852 if (n == 0) 01853 pkt->flags = is_keyframe; 01854 pkt->stream_index = st->index; 01855 01856 if (track->ms_compat) 01857 pkt->dts = timecode; 01858 else 01859 pkt->pts = timecode; 01860 pkt->pos = pos; 01861 if (st->codec->codec_id == CODEC_ID_TEXT) 01862 pkt->convergence_duration = duration; 01863 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE) 01864 pkt->duration = duration; 01865 01866 if (st->codec->codec_id == CODEC_ID_SSA) 01867 matroska_fix_ass_packet(matroska, pkt, duration); 01868 01869 if (matroska->prev_pkt && 01870 timecode != AV_NOPTS_VALUE && 01871 matroska->prev_pkt->pts == timecode && 01872 matroska->prev_pkt->stream_index == st->index && 01873 st->codec->codec_id == CODEC_ID_SSA) 01874 matroska_merge_packets(matroska->prev_pkt, pkt); 01875 else { 01876 dynarray_add(&matroska->packets,&matroska->num_packets,pkt); 01877 matroska->prev_pkt = pkt; 01878 } 01879 } 01880 01881 if (timecode != AV_NOPTS_VALUE) 01882 timecode = duration ? timecode + duration : AV_NOPTS_VALUE; 01883 data += lace_size[n]; 01884 size -= lace_size[n]; 01885 } 01886 } 01887 01888 av_free(lace_size); 01889 return res; 01890 } 01891 01892 static int matroska_parse_cluster(MatroskaDemuxContext *matroska) 01893 { 01894 MatroskaCluster cluster = { 0 }; 01895 EbmlList *blocks_list; 01896 MatroskaBlock *blocks; 01897 int i, res; 01898 int64_t pos = avio_tell(matroska->ctx->pb); 01899 matroska->prev_pkt = NULL; 01900 if (matroska->current_id) 01901 pos -= 4; /* sizeof the ID which was already read */ 01902 res = ebml_parse(matroska, matroska_clusters, &cluster); 01903 blocks_list = &cluster.blocks; 01904 blocks = blocks_list->elem; 01905 for (i=0; i<blocks_list->nb_elem; i++) 01906 if (blocks[i].bin.size > 0 && blocks[i].bin.data) { 01907 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1; 01908 if (!blocks[i].non_simple) 01909 blocks[i].duration = AV_NOPTS_VALUE; 01910 res=matroska_parse_block(matroska, 01911 blocks[i].bin.data, blocks[i].bin.size, 01912 blocks[i].bin.pos, cluster.timecode, 01913 blocks[i].duration, is_keyframe, 01914 pos); 01915 } 01916 ebml_free(matroska_cluster, &cluster); 01917 if (res < 0) matroska->done = 1; 01918 return res; 01919 } 01920 01921 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt) 01922 { 01923 MatroskaDemuxContext *matroska = s->priv_data; 01924 01925 while (matroska_deliver_packet(matroska, pkt)) { 01926 if (matroska->done) 01927 return AVERROR_EOF; 01928 matroska_parse_cluster(matroska); 01929 } 01930 01931 return 0; 01932 } 01933 01934 static int matroska_read_seek(AVFormatContext *s, int stream_index, 01935 int64_t timestamp, int flags) 01936 { 01937 MatroskaDemuxContext *matroska = s->priv_data; 01938 MatroskaTrack *tracks = matroska->tracks.elem; 01939 AVStream *st = s->streams[stream_index]; 01940 int i, index, index_sub, index_min; 01941 01942 if (!st->nb_index_entries) 01943 return 0; 01944 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp); 01945 01946 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { 01947 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET); 01948 matroska->current_id = 0; 01949 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { 01950 matroska_clear_queue(matroska); 01951 if (matroska_parse_cluster(matroska) < 0) 01952 break; 01953 } 01954 } 01955 01956 matroska_clear_queue(matroska); 01957 if (index < 0) 01958 return 0; 01959 01960 index_min = index; 01961 for (i=0; i < matroska->tracks.nb_elem; i++) { 01962 tracks[i].audio.pkt_cnt = 0; 01963 tracks[i].audio.sub_packet_cnt = 0; 01964 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE; 01965 tracks[i].end_timecode = 0; 01966 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE 01967 && !tracks[i].stream->discard != AVDISCARD_ALL) { 01968 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD); 01969 if (index_sub >= 0 01970 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos 01971 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale) 01972 index_min = index_sub; 01973 } 01974 } 01975 01976 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET); 01977 matroska->current_id = 0; 01978 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); 01979 matroska->skip_to_timecode = st->index_entries[index].timestamp; 01980 matroska->done = 0; 01981 av_update_cur_dts(s, st, st->index_entries[index].timestamp); 01982 return 0; 01983 } 01984 01985 static int matroska_read_close(AVFormatContext *s) 01986 { 01987 MatroskaDemuxContext *matroska = s->priv_data; 01988 MatroskaTrack *tracks = matroska->tracks.elem; 01989 int n; 01990 01991 matroska_clear_queue(matroska); 01992 01993 for (n=0; n < matroska->tracks.nb_elem; n++) 01994 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO) 01995 av_free(tracks[n].audio.buf); 01996 ebml_free(matroska_segment, matroska); 01997 01998 return 0; 01999 } 02000 02001 AVInputFormat ff_matroska_demuxer = { 02002 "matroska,webm", 02003 NULL_IF_CONFIG_SMALL("Matroska/WebM file format"), 02004 sizeof(MatroskaDemuxContext), 02005 matroska_probe, 02006 matroska_read_header, 02007 matroska_read_packet, 02008 matroska_read_close, 02009 matroska_read_seek, 02010 };