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 av_free(*str); 00640 /* EBML strings are usually not 0-terminated, so we allocate one 00641 * byte more, read the string and NULL-terminate it ourselves. */ 00642 if (!(*str = av_malloc(size + 1))) 00643 return AVERROR(ENOMEM); 00644 if (avio_read(pb, (uint8_t *) *str, size) != size) { 00645 av_freep(str); 00646 return AVERROR(EIO); 00647 } 00648 (*str)[size] = '\0'; 00649 00650 return 0; 00651 } 00652 00653 /* 00654 * Read the next element as binary data. 00655 * 0 is success, < 0 is failure. 00656 */ 00657 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin) 00658 { 00659 av_free(bin->data); 00660 if (!(bin->data = av_malloc(length))) 00661 return AVERROR(ENOMEM); 00662 00663 bin->size = length; 00664 bin->pos = avio_tell(pb); 00665 if (avio_read(pb, bin->data, length) != length) { 00666 av_freep(&bin->data); 00667 return AVERROR(EIO); 00668 } 00669 00670 return 0; 00671 } 00672 00673 /* 00674 * Read the next element, but only the header. The contents 00675 * are supposed to be sub-elements which can be read separately. 00676 * 0 is success, < 0 is failure. 00677 */ 00678 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length) 00679 { 00680 AVIOContext *pb = matroska->ctx->pb; 00681 MatroskaLevel *level; 00682 00683 if (matroska->num_levels >= EBML_MAX_DEPTH) { 00684 av_log(matroska->ctx, AV_LOG_ERROR, 00685 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH); 00686 return AVERROR(ENOSYS); 00687 } 00688 00689 level = &matroska->levels[matroska->num_levels++]; 00690 level->start = avio_tell(pb); 00691 level->length = length; 00692 00693 return 0; 00694 } 00695 00696 /* 00697 * Read signed/unsigned "EBML" numbers. 00698 * Return: number of bytes processed, < 0 on error 00699 */ 00700 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, 00701 uint8_t *data, uint32_t size, uint64_t *num) 00702 { 00703 AVIOContext pb; 00704 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL); 00705 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num); 00706 } 00707 00708 /* 00709 * Same as above, but signed. 00710 */ 00711 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, 00712 uint8_t *data, uint32_t size, int64_t *num) 00713 { 00714 uint64_t unum; 00715 int res; 00716 00717 /* read as unsigned number first */ 00718 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0) 00719 return res; 00720 00721 /* make signed (weird way) */ 00722 *num = unum - ((1LL << (7*res - 1)) - 1); 00723 00724 return res; 00725 } 00726 00727 static int ebml_parse_elem(MatroskaDemuxContext *matroska, 00728 EbmlSyntax *syntax, void *data); 00729 00730 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00731 uint32_t id, void *data) 00732 { 00733 int i; 00734 for (i=0; syntax[i].id; i++) 00735 if (id == syntax[i].id) 00736 break; 00737 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER && 00738 matroska->num_levels > 0 && 00739 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff) 00740 return 0; // we reached the end of an unknown size cluster 00741 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) 00742 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id); 00743 return ebml_parse_elem(matroska, &syntax[i], data); 00744 } 00745 00746 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00747 void *data) 00748 { 00749 if (!matroska->current_id) { 00750 uint64_t id; 00751 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id); 00752 if (res < 0) 00753 return res; 00754 matroska->current_id = id | 1 << 7*res; 00755 } 00756 return ebml_parse_id(matroska, syntax, matroska->current_id, data); 00757 } 00758 00759 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, 00760 void *data) 00761 { 00762 int i, res = 0; 00763 00764 for (i=0; syntax[i].id; i++) 00765 switch (syntax[i].type) { 00766 case EBML_UINT: 00767 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u; 00768 break; 00769 case EBML_FLOAT: 00770 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f; 00771 break; 00772 case EBML_STR: 00773 case EBML_UTF8: 00774 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s); 00775 break; 00776 } 00777 00778 while (!res && !ebml_level_end(matroska)) 00779 res = ebml_parse(matroska, syntax, data); 00780 00781 return res; 00782 } 00783 00784 static int ebml_parse_elem(MatroskaDemuxContext *matroska, 00785 EbmlSyntax *syntax, void *data) 00786 { 00787 static const uint64_t max_lengths[EBML_TYPE_COUNT] = { 00788 [EBML_UINT] = 8, 00789 [EBML_FLOAT] = 8, 00790 // max. 16 MB for strings 00791 [EBML_STR] = 0x1000000, 00792 [EBML_UTF8] = 0x1000000, 00793 // max. 256 MB for binary data 00794 [EBML_BIN] = 0x10000000, 00795 // no limits for anything else 00796 }; 00797 AVIOContext *pb = matroska->ctx->pb; 00798 uint32_t id = syntax->id; 00799 uint64_t length; 00800 int res; 00801 void *newelem; 00802 00803 data = (char *)data + syntax->data_offset; 00804 if (syntax->list_elem_size) { 00805 EbmlList *list = data; 00806 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size); 00807 if (!newelem) 00808 return AVERROR(ENOMEM); 00809 list->elem = newelem; 00810 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size; 00811 memset(data, 0, syntax->list_elem_size); 00812 list->nb_elem++; 00813 } 00814 00815 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) { 00816 matroska->current_id = 0; 00817 if ((res = ebml_read_length(matroska, pb, &length)) < 0) 00818 return res; 00819 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) { 00820 av_log(matroska->ctx, AV_LOG_ERROR, 00821 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n", 00822 length, max_lengths[syntax->type], syntax->type); 00823 return AVERROR_INVALIDDATA; 00824 } 00825 } 00826 00827 switch (syntax->type) { 00828 case EBML_UINT: res = ebml_read_uint (pb, length, data); break; 00829 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break; 00830 case EBML_STR: 00831 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break; 00832 case EBML_BIN: res = ebml_read_binary(pb, length, data); break; 00833 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0) 00834 return res; 00835 if (id == MATROSKA_ID_SEGMENT) 00836 matroska->segment_start = avio_tell(matroska->ctx->pb); 00837 return ebml_parse_nest(matroska, syntax->def.n, data); 00838 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data); 00839 case EBML_STOP: return 1; 00840 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0; 00841 } 00842 if (res == AVERROR_INVALIDDATA) 00843 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n"); 00844 else if (res == AVERROR(EIO)) 00845 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n"); 00846 return res; 00847 } 00848 00849 static void ebml_free(EbmlSyntax *syntax, void *data) 00850 { 00851 int i, j; 00852 for (i=0; syntax[i].id; i++) { 00853 void *data_off = (char *)data + syntax[i].data_offset; 00854 switch (syntax[i].type) { 00855 case EBML_STR: 00856 case EBML_UTF8: av_freep(data_off); break; 00857 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break; 00858 case EBML_NEST: 00859 if (syntax[i].list_elem_size) { 00860 EbmlList *list = data_off; 00861 char *ptr = list->elem; 00862 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size) 00863 ebml_free(syntax[i].def.n, ptr); 00864 av_free(list->elem); 00865 } else 00866 ebml_free(syntax[i].def.n, data_off); 00867 default: break; 00868 } 00869 } 00870 } 00871 00872 00873 /* 00874 * Autodetecting... 00875 */ 00876 static int matroska_probe(AVProbeData *p) 00877 { 00878 uint64_t total = 0; 00879 int len_mask = 0x80, size = 1, n = 1, i; 00880 00881 /* EBML header? */ 00882 if (AV_RB32(p->buf) != EBML_ID_HEADER) 00883 return 0; 00884 00885 /* length of header */ 00886 total = p->buf[4]; 00887 while (size <= 8 && !(total & len_mask)) { 00888 size++; 00889 len_mask >>= 1; 00890 } 00891 if (size > 8) 00892 return 0; 00893 total &= (len_mask - 1); 00894 while (n < size) 00895 total = (total << 8) | p->buf[4 + n++]; 00896 00897 /* Does the probe data contain the whole header? */ 00898 if (p->buf_size < 4 + size + total) 00899 return 0; 00900 00901 /* The header should contain a known document type. For now, 00902 * we don't parse the whole header but simply check for the 00903 * availability of that array of characters inside the header. 00904 * Not fully fool-proof, but good enough. */ 00905 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) { 00906 int probelen = strlen(matroska_doctypes[i]); 00907 if (total < probelen) 00908 continue; 00909 for (n = 4+size; n <= 4+size+total-probelen; n++) 00910 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen)) 00911 return AVPROBE_SCORE_MAX; 00912 } 00913 00914 // probably valid EBML header but no recognized doctype 00915 return AVPROBE_SCORE_MAX/2; 00916 } 00917 00918 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska, 00919 int num) 00920 { 00921 MatroskaTrack *tracks = matroska->tracks.elem; 00922 int i; 00923 00924 for (i=0; i < matroska->tracks.nb_elem; i++) 00925 if (tracks[i].num == num) 00926 return &tracks[i]; 00927 00928 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num); 00929 return NULL; 00930 } 00931 00932 static int matroska_decode_buffer(uint8_t** buf, int* buf_size, 00933 MatroskaTrack *track) 00934 { 00935 MatroskaTrackEncoding *encodings = track->encodings.elem; 00936 uint8_t* data = *buf; 00937 int isize = *buf_size; 00938 uint8_t* pkt_data = NULL; 00939 uint8_t* newpktdata; 00940 int pkt_size = isize; 00941 int result = 0; 00942 int olen; 00943 00944 if (pkt_size >= 10000000) 00945 return -1; 00946 00947 switch (encodings[0].compression.algo) { 00948 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: 00949 return encodings[0].compression.settings.size; 00950 case MATROSKA_TRACK_ENCODING_COMP_LZO: 00951 do { 00952 olen = pkt_size *= 3; 00953 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING); 00954 result = av_lzo1x_decode(pkt_data, &olen, data, &isize); 00955 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000); 00956 if (result) 00957 goto failed; 00958 pkt_size -= olen; 00959 break; 00960 #if CONFIG_ZLIB 00961 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { 00962 z_stream zstream = {0}; 00963 if (inflateInit(&zstream) != Z_OK) 00964 return -1; 00965 zstream.next_in = data; 00966 zstream.avail_in = isize; 00967 do { 00968 pkt_size *= 3; 00969 newpktdata = av_realloc(pkt_data, pkt_size); 00970 if (!newpktdata) { 00971 inflateEnd(&zstream); 00972 goto failed; 00973 } 00974 pkt_data = newpktdata; 00975 zstream.avail_out = pkt_size - zstream.total_out; 00976 zstream.next_out = pkt_data + zstream.total_out; 00977 result = inflate(&zstream, Z_NO_FLUSH); 00978 } while (result==Z_OK && pkt_size<10000000); 00979 pkt_size = zstream.total_out; 00980 inflateEnd(&zstream); 00981 if (result != Z_STREAM_END) 00982 goto failed; 00983 break; 00984 } 00985 #endif 00986 #if CONFIG_BZLIB 00987 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { 00988 bz_stream bzstream = {0}; 00989 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) 00990 return -1; 00991 bzstream.next_in = data; 00992 bzstream.avail_in = isize; 00993 do { 00994 pkt_size *= 3; 00995 newpktdata = av_realloc(pkt_data, pkt_size); 00996 if (!newpktdata) { 00997 BZ2_bzDecompressEnd(&bzstream); 00998 goto failed; 00999 } 01000 pkt_data = newpktdata; 01001 bzstream.avail_out = pkt_size - bzstream.total_out_lo32; 01002 bzstream.next_out = pkt_data + bzstream.total_out_lo32; 01003 result = BZ2_bzDecompress(&bzstream); 01004 } while (result==BZ_OK && pkt_size<10000000); 01005 pkt_size = bzstream.total_out_lo32; 01006 BZ2_bzDecompressEnd(&bzstream); 01007 if (result != BZ_STREAM_END) 01008 goto failed; 01009 break; 01010 } 01011 #endif 01012 default: 01013 return -1; 01014 } 01015 01016 *buf = pkt_data; 01017 *buf_size = pkt_size; 01018 return 0; 01019 failed: 01020 av_free(pkt_data); 01021 return -1; 01022 } 01023 01024 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, 01025 AVPacket *pkt, uint64_t display_duration) 01026 { 01027 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size; 01028 for (; *ptr!=',' && ptr<end-1; ptr++); 01029 if (*ptr == ',') 01030 layer = ++ptr; 01031 for (; *ptr!=',' && ptr<end-1; ptr++); 01032 if (*ptr == ',') { 01033 int64_t end_pts = pkt->pts + display_duration; 01034 int sc = matroska->time_scale * pkt->pts / 10000000; 01035 int ec = matroska->time_scale * end_pts / 10000000; 01036 int sh, sm, ss, eh, em, es, len; 01037 sh = sc/360000; sc -= 360000*sh; 01038 sm = sc/ 6000; sc -= 6000*sm; 01039 ss = sc/ 100; sc -= 100*ss; 01040 eh = ec/360000; ec -= 360000*eh; 01041 em = ec/ 6000; ec -= 6000*em; 01042 es = ec/ 100; ec -= 100*es; 01043 *ptr++ = '\0'; 01044 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE; 01045 if (!(line = av_malloc(len))) 01046 return; 01047 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n", 01048 layer, sh, sm, ss, sc, eh, em, es, ec, ptr); 01049 av_free(pkt->data); 01050 pkt->data = line; 01051 pkt->size = strlen(line); 01052 } 01053 } 01054 01055 static int matroska_merge_packets(AVPacket *out, AVPacket *in) 01056 { 01057 void *newdata = av_realloc(out->data, out->size+in->size); 01058 if (!newdata) 01059 return AVERROR(ENOMEM); 01060 out->data = newdata; 01061 memcpy(out->data+out->size, in->data, in->size); 01062 out->size += in->size; 01063 av_destruct_packet(in); 01064 av_free(in); 01065 return 0; 01066 } 01067 01068 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, 01069 AVDictionary **metadata, char *prefix) 01070 { 01071 MatroskaTag *tags = list->elem; 01072 char key[1024]; 01073 int i; 01074 01075 for (i=0; i < list->nb_elem; i++) { 01076 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL; 01077 01078 if (!tags[i].name) { 01079 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n"); 01080 continue; 01081 } 01082 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name); 01083 else av_strlcpy(key, tags[i].name, sizeof(key)); 01084 if (tags[i].def || !lang) { 01085 av_dict_set(metadata, key, tags[i].string, 0); 01086 if (tags[i].sub.nb_elem) 01087 matroska_convert_tag(s, &tags[i].sub, metadata, key); 01088 } 01089 if (lang) { 01090 av_strlcat(key, "-", sizeof(key)); 01091 av_strlcat(key, lang, sizeof(key)); 01092 av_dict_set(metadata, key, tags[i].string, 0); 01093 if (tags[i].sub.nb_elem) 01094 matroska_convert_tag(s, &tags[i].sub, metadata, key); 01095 } 01096 } 01097 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv); 01098 } 01099 01100 static void matroska_convert_tags(AVFormatContext *s) 01101 { 01102 MatroskaDemuxContext *matroska = s->priv_data; 01103 MatroskaTags *tags = matroska->tags.elem; 01104 int i, j; 01105 01106 for (i=0; i < matroska->tags.nb_elem; i++) { 01107 if (tags[i].target.attachuid) { 01108 MatroskaAttachement *attachment = matroska->attachments.elem; 01109 for (j=0; j<matroska->attachments.nb_elem; j++) 01110 if (attachment[j].uid == tags[i].target.attachuid 01111 && attachment[j].stream) 01112 matroska_convert_tag(s, &tags[i].tag, 01113 &attachment[j].stream->metadata, NULL); 01114 } else if (tags[i].target.chapteruid) { 01115 MatroskaChapter *chapter = matroska->chapters.elem; 01116 for (j=0; j<matroska->chapters.nb_elem; j++) 01117 if (chapter[j].uid == tags[i].target.chapteruid 01118 && chapter[j].chapter) 01119 matroska_convert_tag(s, &tags[i].tag, 01120 &chapter[j].chapter->metadata, NULL); 01121 } else if (tags[i].target.trackuid) { 01122 MatroskaTrack *track = matroska->tracks.elem; 01123 for (j=0; j<matroska->tracks.nb_elem; j++) 01124 if (track[j].uid == tags[i].target.trackuid && track[j].stream) 01125 matroska_convert_tag(s, &tags[i].tag, 01126 &track[j].stream->metadata, NULL); 01127 } else { 01128 matroska_convert_tag(s, &tags[i].tag, &s->metadata, 01129 tags[i].target.type); 01130 } 01131 } 01132 } 01133 01134 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska) 01135 { 01136 EbmlList *seekhead_list = &matroska->seekhead; 01137 MatroskaSeekhead *seekhead = seekhead_list->elem; 01138 uint32_t level_up = matroska->level_up; 01139 int64_t before_pos = avio_tell(matroska->ctx->pb); 01140 uint32_t saved_id = matroska->current_id; 01141 MatroskaLevel level; 01142 int i; 01143 01144 // we should not do any seeking in the streaming case 01145 if (!matroska->ctx->pb->seekable || 01146 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)) 01147 return; 01148 01149 for (i=0; i<seekhead_list->nb_elem; i++) { 01150 int64_t offset = seekhead[i].pos + matroska->segment_start; 01151 01152 if (seekhead[i].pos <= before_pos 01153 || seekhead[i].id == MATROSKA_ID_SEEKHEAD 01154 || seekhead[i].id == MATROSKA_ID_CLUSTER) 01155 continue; 01156 01157 /* seek */ 01158 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) != offset) 01159 continue; 01160 01161 /* We don't want to lose our seekhead level, so we add 01162 * a dummy. This is a crude hack. */ 01163 if (matroska->num_levels == EBML_MAX_DEPTH) { 01164 av_log(matroska->ctx, AV_LOG_INFO, 01165 "Max EBML element depth (%d) reached, " 01166 "cannot parse further.\n", EBML_MAX_DEPTH); 01167 break; 01168 } 01169 01170 level.start = 0; 01171 level.length = (uint64_t)-1; 01172 matroska->levels[matroska->num_levels] = level; 01173 matroska->num_levels++; 01174 matroska->current_id = 0; 01175 01176 ebml_parse(matroska, matroska_segment, matroska); 01177 01178 /* remove dummy level */ 01179 while (matroska->num_levels) { 01180 uint64_t length = matroska->levels[--matroska->num_levels].length; 01181 if (length == (uint64_t)-1) 01182 break; 01183 } 01184 } 01185 01186 /* seek back */ 01187 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET); 01188 matroska->level_up = level_up; 01189 matroska->current_id = saved_id; 01190 } 01191 01192 static int matroska_aac_profile(char *codec_id) 01193 { 01194 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" }; 01195 int profile; 01196 01197 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++) 01198 if (strstr(codec_id, aac_profiles[profile])) 01199 break; 01200 return profile + 1; 01201 } 01202 01203 static int matroska_aac_sri(int samplerate) 01204 { 01205 int sri; 01206 01207 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++) 01208 if (ff_mpeg4audio_sample_rates[sri] == samplerate) 01209 break; 01210 return sri; 01211 } 01212 01213 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap) 01214 { 01215 MatroskaDemuxContext *matroska = s->priv_data; 01216 EbmlList *attachements_list = &matroska->attachments; 01217 MatroskaAttachement *attachements; 01218 EbmlList *chapters_list = &matroska->chapters; 01219 MatroskaChapter *chapters; 01220 MatroskaTrack *tracks; 01221 EbmlList *index_list; 01222 MatroskaIndex *index; 01223 int index_scale = 1; 01224 uint64_t max_start = 0; 01225 Ebml ebml = { 0 }; 01226 AVStream *st; 01227 int i, j, res; 01228 01229 matroska->ctx = s; 01230 01231 /* First read the EBML header. */ 01232 if (ebml_parse(matroska, ebml_syntax, &ebml) 01233 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t) 01234 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) { 01235 av_log(matroska->ctx, AV_LOG_ERROR, 01236 "EBML header using unsupported features\n" 01237 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", 01238 ebml.version, ebml.doctype, ebml.doctype_version); 01239 ebml_free(ebml_syntax, &ebml); 01240 return AVERROR_PATCHWELCOME; 01241 } 01242 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) 01243 if (!strcmp(ebml.doctype, matroska_doctypes[i])) 01244 break; 01245 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) { 01246 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype); 01247 } 01248 ebml_free(ebml_syntax, &ebml); 01249 01250 /* The next thing is a segment. */ 01251 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0) 01252 return res; 01253 matroska_execute_seekhead(matroska); 01254 01255 if (!matroska->time_scale) 01256 matroska->time_scale = 1000000; 01257 if (matroska->duration) 01258 matroska->ctx->duration = matroska->duration * matroska->time_scale 01259 * 1000 / AV_TIME_BASE; 01260 av_dict_set(&s->metadata, "title", matroska->title, 0); 01261 01262 tracks = matroska->tracks.elem; 01263 for (i=0; i < matroska->tracks.nb_elem; i++) { 01264 MatroskaTrack *track = &tracks[i]; 01265 enum CodecID codec_id = CODEC_ID_NONE; 01266 EbmlList *encodings_list = &tracks->encodings; 01267 MatroskaTrackEncoding *encodings = encodings_list->elem; 01268 uint8_t *extradata = NULL; 01269 int extradata_size = 0; 01270 int extradata_offset = 0; 01271 AVIOContext b; 01272 01273 /* Apply some sanity checks. */ 01274 if (track->type != MATROSKA_TRACK_TYPE_VIDEO && 01275 track->type != MATROSKA_TRACK_TYPE_AUDIO && 01276 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { 01277 av_log(matroska->ctx, AV_LOG_INFO, 01278 "Unknown or unsupported track type %"PRIu64"\n", 01279 track->type); 01280 continue; 01281 } 01282 if (track->codec_id == NULL) 01283 continue; 01284 01285 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { 01286 if (!track->default_duration) 01287 track->default_duration = 1000000000/track->video.frame_rate; 01288 if (!track->video.display_width) 01289 track->video.display_width = track->video.pixel_width; 01290 if (!track->video.display_height) 01291 track->video.display_height = track->video.pixel_height; 01292 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { 01293 if (!track->audio.out_samplerate) 01294 track->audio.out_samplerate = track->audio.samplerate; 01295 } 01296 if (encodings_list->nb_elem > 1) { 01297 av_log(matroska->ctx, AV_LOG_ERROR, 01298 "Multiple combined encodings no supported"); 01299 } else if (encodings_list->nb_elem == 1) { 01300 if (encodings[0].type || 01301 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && 01302 #if CONFIG_ZLIB 01303 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB && 01304 #endif 01305 #if CONFIG_BZLIB 01306 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB && 01307 #endif 01308 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) { 01309 encodings[0].scope = 0; 01310 av_log(matroska->ctx, AV_LOG_ERROR, 01311 "Unsupported encoding type"); 01312 } else if (track->codec_priv.size && encodings[0].scope&2) { 01313 uint8_t *codec_priv = track->codec_priv.data; 01314 int offset = matroska_decode_buffer(&track->codec_priv.data, 01315 &track->codec_priv.size, 01316 track); 01317 if (offset < 0) { 01318 track->codec_priv.data = NULL; 01319 track->codec_priv.size = 0; 01320 av_log(matroska->ctx, AV_LOG_ERROR, 01321 "Failed to decode codec private data\n"); 01322 } else if (offset > 0) { 01323 track->codec_priv.data = av_malloc(track->codec_priv.size + offset); 01324 memcpy(track->codec_priv.data, 01325 encodings[0].compression.settings.data, offset); 01326 memcpy(track->codec_priv.data+offset, codec_priv, 01327 track->codec_priv.size); 01328 track->codec_priv.size += offset; 01329 } 01330 if (codec_priv != track->codec_priv.data) 01331 av_free(codec_priv); 01332 } 01333 } 01334 01335 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ 01336 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, 01337 strlen(ff_mkv_codec_tags[j].str))){ 01338 codec_id= ff_mkv_codec_tags[j].id; 01339 break; 01340 } 01341 } 01342 01343 st = track->stream = av_new_stream(s, 0); 01344 if (st == NULL) 01345 return AVERROR(ENOMEM); 01346 01347 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") 01348 && track->codec_priv.size >= 40 01349 && track->codec_priv.data != NULL) { 01350 track->ms_compat = 1; 01351 track->video.fourcc = AV_RL32(track->codec_priv.data + 16); 01352 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc); 01353 extradata_offset = 40; 01354 } else if (!strcmp(track->codec_id, "A_MS/ACM") 01355 && track->codec_priv.size >= 14 01356 && track->codec_priv.data != NULL) { 01357 int ret; 01358 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size, 01359 AVIO_FLAG_READ, NULL, NULL, NULL, NULL); 01360 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size); 01361 if (ret < 0) 01362 return ret; 01363 codec_id = st->codec->codec_id; 01364 extradata_offset = FFMIN(track->codec_priv.size, 18); 01365 } else if (!strcmp(track->codec_id, "V_QUICKTIME") 01366 && (track->codec_priv.size >= 86) 01367 && (track->codec_priv.data != NULL)) { 01368 track->video.fourcc = AV_RL32(track->codec_priv.data); 01369 codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc); 01370 } else if (codec_id == CODEC_ID_PCM_S16BE) { 01371 switch (track->audio.bitdepth) { 01372 case 8: codec_id = CODEC_ID_PCM_U8; break; 01373 case 24: codec_id = CODEC_ID_PCM_S24BE; break; 01374 case 32: codec_id = CODEC_ID_PCM_S32BE; break; 01375 } 01376 } else if (codec_id == CODEC_ID_PCM_S16LE) { 01377 switch (track->audio.bitdepth) { 01378 case 8: codec_id = CODEC_ID_PCM_U8; break; 01379 case 24: codec_id = CODEC_ID_PCM_S24LE; break; 01380 case 32: codec_id = CODEC_ID_PCM_S32LE; break; 01381 } 01382 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) { 01383 codec_id = CODEC_ID_PCM_F64LE; 01384 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) { 01385 int profile = matroska_aac_profile(track->codec_id); 01386 int sri = matroska_aac_sri(track->audio.samplerate); 01387 extradata = av_malloc(5); 01388 if (extradata == NULL) 01389 return AVERROR(ENOMEM); 01390 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); 01391 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3); 01392 if (strstr(track->codec_id, "SBR")) { 01393 sri = matroska_aac_sri(track->audio.out_samplerate); 01394 extradata[2] = 0x56; 01395 extradata[3] = 0xE5; 01396 extradata[4] = 0x80 | (sri<<3); 01397 extradata_size = 5; 01398 } else 01399 extradata_size = 2; 01400 } else if (codec_id == CODEC_ID_TTA) { 01401 extradata_size = 30; 01402 extradata = av_mallocz(extradata_size); 01403 if (extradata == NULL) 01404 return AVERROR(ENOMEM); 01405 ffio_init_context(&b, extradata, extradata_size, 1, 01406 NULL, NULL, NULL, NULL); 01407 avio_write(&b, "TTA1", 4); 01408 avio_wl16(&b, 1); 01409 avio_wl16(&b, track->audio.channels); 01410 avio_wl16(&b, track->audio.bitdepth); 01411 avio_wl32(&b, track->audio.out_samplerate); 01412 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate); 01413 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || 01414 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { 01415 extradata_offset = 26; 01416 } else if (codec_id == CODEC_ID_RA_144) { 01417 track->audio.out_samplerate = 8000; 01418 track->audio.channels = 1; 01419 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || 01420 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) { 01421 int flavor; 01422 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size, 01423 0, NULL, NULL, NULL, NULL); 01424 avio_skip(&b, 22); 01425 flavor = avio_rb16(&b); 01426 track->audio.coded_framesize = avio_rb32(&b); 01427 avio_skip(&b, 12); 01428 track->audio.sub_packet_h = avio_rb16(&b); 01429 track->audio.frame_size = avio_rb16(&b); 01430 track->audio.sub_packet_size = avio_rb16(&b); 01431 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h); 01432 if (codec_id == CODEC_ID_RA_288) { 01433 st->codec->block_align = track->audio.coded_framesize; 01434 track->codec_priv.size = 0; 01435 } else { 01436 if (codec_id == CODEC_ID_SIPR && flavor < 4) { 01437 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 }; 01438 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor]; 01439 st->codec->bit_rate = sipr_bit_rate[flavor]; 01440 } 01441 st->codec->block_align = track->audio.sub_packet_size; 01442 extradata_offset = 78; 01443 } 01444 } 01445 track->codec_priv.size -= extradata_offset; 01446 01447 if (codec_id == CODEC_ID_NONE) 01448 av_log(matroska->ctx, AV_LOG_INFO, 01449 "Unknown/unsupported CodecID %s.\n", track->codec_id); 01450 01451 if (track->time_scale < 0.01) 01452 track->time_scale = 1.0; 01453 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ 01454 01455 st->codec->codec_id = codec_id; 01456 st->start_time = 0; 01457 if (strcmp(track->language, "und")) 01458 av_dict_set(&st->metadata, "language", track->language, 0); 01459 av_dict_set(&st->metadata, "title", track->name, 0); 01460 01461 if (track->flag_default) 01462 st->disposition |= AV_DISPOSITION_DEFAULT; 01463 if (track->flag_forced) 01464 st->disposition |= AV_DISPOSITION_FORCED; 01465 01466 if (track->default_duration) 01467 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, 01468 track->default_duration, 1000000000, 30000); 01469 01470 if (!st->codec->extradata) { 01471 if(extradata){ 01472 st->codec->extradata = extradata; 01473 st->codec->extradata_size = extradata_size; 01474 } else if(track->codec_priv.data && track->codec_priv.size > 0){ 01475 st->codec->extradata = av_mallocz(track->codec_priv.size + 01476 FF_INPUT_BUFFER_PADDING_SIZE); 01477 if(st->codec->extradata == NULL) 01478 return AVERROR(ENOMEM); 01479 st->codec->extradata_size = track->codec_priv.size; 01480 memcpy(st->codec->extradata, 01481 track->codec_priv.data + extradata_offset, 01482 track->codec_priv.size); 01483 } 01484 } 01485 01486 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { 01487 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 01488 st->codec->codec_tag = track->video.fourcc; 01489 st->codec->width = track->video.pixel_width; 01490 st->codec->height = track->video.pixel_height; 01491 av_reduce(&st->sample_aspect_ratio.num, 01492 &st->sample_aspect_ratio.den, 01493 st->codec->height * track->video.display_width, 01494 st->codec-> width * track->video.display_height, 01495 255); 01496 if (st->codec->codec_id != CODEC_ID_H264) 01497 st->need_parsing = AVSTREAM_PARSE_HEADERS; 01498 if (track->default_duration) 01499 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX); 01500 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { 01501 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 01502 st->codec->sample_rate = track->audio.out_samplerate; 01503 st->codec->channels = track->audio.channels; 01504 if (st->codec->codec_id != CODEC_ID_AAC) 01505 st->need_parsing = AVSTREAM_PARSE_HEADERS; 01506 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { 01507 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; 01508 } 01509 } 01510 01511 attachements = attachements_list->elem; 01512 for (j=0; j<attachements_list->nb_elem; j++) { 01513 if (!(attachements[j].filename && attachements[j].mime && 01514 attachements[j].bin.data && attachements[j].bin.size > 0)) { 01515 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); 01516 } else { 01517 AVStream *st = av_new_stream(s, 0); 01518 if (st == NULL) 01519 break; 01520 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0); 01521 st->codec->codec_id = CODEC_ID_NONE; 01522 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; 01523 st->codec->extradata = av_malloc(attachements[j].bin.size); 01524 if(st->codec->extradata == NULL) 01525 break; 01526 st->codec->extradata_size = attachements[j].bin.size; 01527 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size); 01528 01529 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { 01530 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime, 01531 strlen(ff_mkv_mime_tags[i].str))) { 01532 st->codec->codec_id = ff_mkv_mime_tags[i].id; 01533 break; 01534 } 01535 } 01536 attachements[j].stream = st; 01537 } 01538 } 01539 01540 chapters = chapters_list->elem; 01541 for (i=0; i<chapters_list->nb_elem; i++) 01542 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid 01543 && (max_start==0 || chapters[i].start > max_start)) { 01544 chapters[i].chapter = 01545 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000}, 01546 chapters[i].start, chapters[i].end, 01547 chapters[i].title); 01548 av_dict_set(&chapters[i].chapter->metadata, 01549 "title", chapters[i].title, 0); 01550 max_start = chapters[i].start; 01551 } 01552 01553 index_list = &matroska->index; 01554 index = index_list->elem; 01555 if (index_list->nb_elem 01556 && index[0].time > 100000000000000/matroska->time_scale) { 01557 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n"); 01558 index_scale = matroska->time_scale; 01559 } 01560 for (i=0; i<index_list->nb_elem; i++) { 01561 EbmlList *pos_list = &index[i].pos; 01562 MatroskaIndexPos *pos = pos_list->elem; 01563 for (j=0; j<pos_list->nb_elem; j++) { 01564 MatroskaTrack *track = matroska_find_track_by_num(matroska, 01565 pos[j].track); 01566 if (track && track->stream) 01567 av_add_index_entry(track->stream, 01568 pos[j].pos + matroska->segment_start, 01569 index[i].time/index_scale, 0, 0, 01570 AVINDEX_KEYFRAME); 01571 } 01572 } 01573 01574 matroska_convert_tags(s); 01575 01576 return 0; 01577 } 01578 01579 /* 01580 * Put one packet in an application-supplied AVPacket struct. 01581 * Returns 0 on success or -1 on failure. 01582 */ 01583 static int matroska_deliver_packet(MatroskaDemuxContext *matroska, 01584 AVPacket *pkt) 01585 { 01586 if (matroska->num_packets > 0) { 01587 memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); 01588 av_free(matroska->packets[0]); 01589 if (matroska->num_packets > 1) { 01590 void *newpackets; 01591 memmove(&matroska->packets[0], &matroska->packets[1], 01592 (matroska->num_packets - 1) * sizeof(AVPacket *)); 01593 newpackets = av_realloc(matroska->packets, 01594 (matroska->num_packets - 1) * sizeof(AVPacket *)); 01595 if (newpackets) 01596 matroska->packets = newpackets; 01597 } else { 01598 av_freep(&matroska->packets); 01599 } 01600 matroska->num_packets--; 01601 return 0; 01602 } 01603 01604 return -1; 01605 } 01606 01607 /* 01608 * Free all packets in our internal queue. 01609 */ 01610 static void matroska_clear_queue(MatroskaDemuxContext *matroska) 01611 { 01612 if (matroska->packets) { 01613 int n; 01614 for (n = 0; n < matroska->num_packets; n++) { 01615 av_free_packet(matroska->packets[n]); 01616 av_free(matroska->packets[n]); 01617 } 01618 av_freep(&matroska->packets); 01619 matroska->num_packets = 0; 01620 } 01621 } 01622 01623 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, 01624 int size, int64_t pos, uint64_t cluster_time, 01625 uint64_t duration, int is_keyframe, 01626 int64_t cluster_pos) 01627 { 01628 uint64_t timecode = AV_NOPTS_VALUE; 01629 MatroskaTrack *track; 01630 int res = 0; 01631 AVStream *st; 01632 AVPacket *pkt; 01633 int16_t block_time; 01634 uint32_t *lace_size = NULL; 01635 int n, flags, laces = 0; 01636 uint64_t num; 01637 01638 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) { 01639 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); 01640 return res; 01641 } 01642 data += n; 01643 size -= n; 01644 01645 track = matroska_find_track_by_num(matroska, num); 01646 if (size <= 3 || !track || !track->stream) { 01647 av_log(matroska->ctx, AV_LOG_INFO, 01648 "Invalid stream %"PRIu64" or size %u\n", num, size); 01649 return res; 01650 } 01651 st = track->stream; 01652 if (st->discard >= AVDISCARD_ALL) 01653 return res; 01654 if (duration == AV_NOPTS_VALUE) 01655 duration = track->default_duration / matroska->time_scale; 01656 01657 block_time = AV_RB16(data); 01658 data += 2; 01659 flags = *data++; 01660 size -= 3; 01661 if (is_keyframe == -1) 01662 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0; 01663 01664 if (cluster_time != (uint64_t)-1 01665 && (block_time >= 0 || cluster_time >= -block_time)) { 01666 timecode = cluster_time + block_time; 01667 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE 01668 && timecode < track->end_timecode) 01669 is_keyframe = 0; /* overlapping subtitles are not key frame */ 01670 if (is_keyframe) 01671 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME); 01672 track->end_timecode = FFMAX(track->end_timecode, timecode+duration); 01673 } 01674 01675 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { 01676 if (!is_keyframe || timecode < matroska->skip_to_timecode) 01677 return res; 01678 matroska->skip_to_keyframe = 0; 01679 } 01680 01681 switch ((flags & 0x06) >> 1) { 01682 case 0x0: /* no lacing */ 01683 laces = 1; 01684 lace_size = av_mallocz(sizeof(int)); 01685 lace_size[0] = size; 01686 break; 01687 01688 case 0x1: /* Xiph lacing */ 01689 case 0x2: /* fixed-size lacing */ 01690 case 0x3: /* EBML lacing */ 01691 assert(size>0); // size <=3 is checked before size-=3 above 01692 laces = (*data) + 1; 01693 data += 1; 01694 size -= 1; 01695 lace_size = av_mallocz(laces * sizeof(int)); 01696 01697 switch ((flags & 0x06) >> 1) { 01698 case 0x1: /* Xiph lacing */ { 01699 uint8_t temp; 01700 uint32_t total = 0; 01701 for (n = 0; res == 0 && n < laces - 1; n++) { 01702 while (1) { 01703 if (size == 0) { 01704 res = -1; 01705 break; 01706 } 01707 temp = *data; 01708 lace_size[n] += temp; 01709 data += 1; 01710 size -= 1; 01711 if (temp != 0xff) 01712 break; 01713 } 01714 total += lace_size[n]; 01715 } 01716 lace_size[n] = size - total; 01717 break; 01718 } 01719 01720 case 0x2: /* fixed-size lacing */ 01721 for (n = 0; n < laces; n++) 01722 lace_size[n] = size / laces; 01723 break; 01724 01725 case 0x3: /* EBML lacing */ { 01726 uint32_t total; 01727 n = matroska_ebmlnum_uint(matroska, data, size, &num); 01728 if (n < 0) { 01729 av_log(matroska->ctx, AV_LOG_INFO, 01730 "EBML block data error\n"); 01731 break; 01732 } 01733 data += n; 01734 size -= n; 01735 total = lace_size[0] = num; 01736 for (n = 1; res == 0 && n < laces - 1; n++) { 01737 int64_t snum; 01738 int r; 01739 r = matroska_ebmlnum_sint(matroska, data, size, &snum); 01740 if (r < 0) { 01741 av_log(matroska->ctx, AV_LOG_INFO, 01742 "EBML block data error\n"); 01743 break; 01744 } 01745 data += r; 01746 size -= r; 01747 lace_size[n] = lace_size[n - 1] + snum; 01748 total += lace_size[n]; 01749 } 01750 lace_size[n] = size - total; 01751 break; 01752 } 01753 } 01754 break; 01755 } 01756 01757 if (res == 0) { 01758 for (n = 0; n < laces; n++) { 01759 if ((st->codec->codec_id == CODEC_ID_RA_288 || 01760 st->codec->codec_id == CODEC_ID_COOK || 01761 st->codec->codec_id == CODEC_ID_SIPR || 01762 st->codec->codec_id == CODEC_ID_ATRAC3) && 01763 st->codec->block_align && track->audio.sub_packet_size) { 01764 int a = st->codec->block_align; 01765 int sps = track->audio.sub_packet_size; 01766 int cfs = track->audio.coded_framesize; 01767 int h = track->audio.sub_packet_h; 01768 int y = track->audio.sub_packet_cnt; 01769 int w = track->audio.frame_size; 01770 int x; 01771 01772 if (!track->audio.pkt_cnt) { 01773 if (track->audio.sub_packet_cnt == 0) 01774 track->audio.buf_timecode = timecode; 01775 if (st->codec->codec_id == CODEC_ID_RA_288) 01776 for (x=0; x<h/2; x++) 01777 memcpy(track->audio.buf+x*2*w+y*cfs, 01778 data+x*cfs, cfs); 01779 else if (st->codec->codec_id == CODEC_ID_SIPR) 01780 memcpy(track->audio.buf + y*w, data, w); 01781 else 01782 for (x=0; x<w/sps; x++) 01783 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); 01784 01785 if (++track->audio.sub_packet_cnt >= h) { 01786 if (st->codec->codec_id == CODEC_ID_SIPR) 01787 ff_rm_reorder_sipr_data(track->audio.buf, h, w); 01788 track->audio.sub_packet_cnt = 0; 01789 track->audio.pkt_cnt = h*w / a; 01790 } 01791 } 01792 while (track->audio.pkt_cnt) { 01793 pkt = av_mallocz(sizeof(AVPacket)); 01794 av_new_packet(pkt, a); 01795 memcpy(pkt->data, track->audio.buf 01796 + a * (h*w / a - track->audio.pkt_cnt--), a); 01797 pkt->pts = track->audio.buf_timecode; 01798 track->audio.buf_timecode = AV_NOPTS_VALUE; 01799 pkt->pos = pos; 01800 pkt->stream_index = st->index; 01801 dynarray_add(&matroska->packets,&matroska->num_packets,pkt); 01802 } 01803 } else { 01804 MatroskaTrackEncoding *encodings = track->encodings.elem; 01805 int offset = 0, pkt_size = lace_size[n]; 01806 uint8_t *pkt_data = data; 01807 01808 if (pkt_size > size) { 01809 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n"); 01810 break; 01811 } 01812 01813 if (encodings && encodings->scope & 1) { 01814 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track); 01815 if (offset < 0) 01816 continue; 01817 } 01818 01819 pkt = av_mallocz(sizeof(AVPacket)); 01820 /* XXX: prevent data copy... */ 01821 if (av_new_packet(pkt, pkt_size+offset) < 0) { 01822 av_free(pkt); 01823 res = AVERROR(ENOMEM); 01824 break; 01825 } 01826 if (offset) 01827 memcpy (pkt->data, encodings->compression.settings.data, offset); 01828 memcpy (pkt->data+offset, pkt_data, pkt_size); 01829 01830 if (pkt_data != data) 01831 av_free(pkt_data); 01832 01833 if (n == 0) 01834 pkt->flags = is_keyframe; 01835 pkt->stream_index = st->index; 01836 01837 if (track->ms_compat) 01838 pkt->dts = timecode; 01839 else 01840 pkt->pts = timecode; 01841 pkt->pos = pos; 01842 if (st->codec->codec_id == CODEC_ID_TEXT) 01843 pkt->convergence_duration = duration; 01844 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE) 01845 pkt->duration = duration; 01846 01847 if (st->codec->codec_id == CODEC_ID_SSA) 01848 matroska_fix_ass_packet(matroska, pkt, duration); 01849 01850 if (matroska->prev_pkt && 01851 timecode != AV_NOPTS_VALUE && 01852 matroska->prev_pkt->pts == timecode && 01853 matroska->prev_pkt->stream_index == st->index && 01854 st->codec->codec_id == CODEC_ID_SSA) 01855 matroska_merge_packets(matroska->prev_pkt, pkt); 01856 else { 01857 dynarray_add(&matroska->packets,&matroska->num_packets,pkt); 01858 matroska->prev_pkt = pkt; 01859 } 01860 } 01861 01862 if (timecode != AV_NOPTS_VALUE) 01863 timecode = duration ? timecode + duration : AV_NOPTS_VALUE; 01864 data += lace_size[n]; 01865 size -= lace_size[n]; 01866 } 01867 } 01868 01869 av_free(lace_size); 01870 return res; 01871 } 01872 01873 static int matroska_parse_cluster(MatroskaDemuxContext *matroska) 01874 { 01875 MatroskaCluster cluster = { 0 }; 01876 EbmlList *blocks_list; 01877 MatroskaBlock *blocks; 01878 int i, res; 01879 int64_t pos = avio_tell(matroska->ctx->pb); 01880 matroska->prev_pkt = NULL; 01881 if (matroska->current_id) 01882 pos -= 4; /* sizeof the ID which was already read */ 01883 res = ebml_parse(matroska, matroska_clusters, &cluster); 01884 blocks_list = &cluster.blocks; 01885 blocks = blocks_list->elem; 01886 for (i=0; i<blocks_list->nb_elem; i++) 01887 if (blocks[i].bin.size > 0 && blocks[i].bin.data) { 01888 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1; 01889 if (!blocks[i].non_simple) 01890 blocks[i].duration = AV_NOPTS_VALUE; 01891 res=matroska_parse_block(matroska, 01892 blocks[i].bin.data, blocks[i].bin.size, 01893 blocks[i].bin.pos, cluster.timecode, 01894 blocks[i].duration, is_keyframe, 01895 pos); 01896 } 01897 ebml_free(matroska_cluster, &cluster); 01898 if (res < 0) matroska->done = 1; 01899 return res; 01900 } 01901 01902 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt) 01903 { 01904 MatroskaDemuxContext *matroska = s->priv_data; 01905 01906 while (matroska_deliver_packet(matroska, pkt)) { 01907 if (matroska->done) 01908 return AVERROR_EOF; 01909 matroska_parse_cluster(matroska); 01910 } 01911 01912 return 0; 01913 } 01914 01915 static int matroska_read_seek(AVFormatContext *s, int stream_index, 01916 int64_t timestamp, int flags) 01917 { 01918 MatroskaDemuxContext *matroska = s->priv_data; 01919 MatroskaTrack *tracks = matroska->tracks.elem; 01920 AVStream *st = s->streams[stream_index]; 01921 int i, index, index_sub, index_min; 01922 01923 if (!st->nb_index_entries) 01924 return 0; 01925 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp); 01926 01927 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { 01928 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET); 01929 matroska->current_id = 0; 01930 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { 01931 matroska_clear_queue(matroska); 01932 if (matroska_parse_cluster(matroska) < 0) 01933 break; 01934 } 01935 } 01936 01937 matroska_clear_queue(matroska); 01938 if (index < 0) 01939 return 0; 01940 01941 index_min = index; 01942 for (i=0; i < matroska->tracks.nb_elem; i++) { 01943 tracks[i].audio.pkt_cnt = 0; 01944 tracks[i].audio.sub_packet_cnt = 0; 01945 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE; 01946 tracks[i].end_timecode = 0; 01947 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE 01948 && !tracks[i].stream->discard != AVDISCARD_ALL) { 01949 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD); 01950 if (index_sub >= 0 01951 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos 01952 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale) 01953 index_min = index_sub; 01954 } 01955 } 01956 01957 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET); 01958 matroska->current_id = 0; 01959 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); 01960 matroska->skip_to_timecode = st->index_entries[index].timestamp; 01961 matroska->done = 0; 01962 av_update_cur_dts(s, st, st->index_entries[index].timestamp); 01963 return 0; 01964 } 01965 01966 static int matroska_read_close(AVFormatContext *s) 01967 { 01968 MatroskaDemuxContext *matroska = s->priv_data; 01969 MatroskaTrack *tracks = matroska->tracks.elem; 01970 int n; 01971 01972 matroska_clear_queue(matroska); 01973 01974 for (n=0; n < matroska->tracks.nb_elem; n++) 01975 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO) 01976 av_free(tracks[n].audio.buf); 01977 ebml_free(matroska_segment, matroska); 01978 01979 return 0; 01980 } 01981 01982 AVInputFormat ff_matroska_demuxer = { 01983 "matroska,webm", 01984 NULL_IF_CONFIG_SMALL("Matroska/WebM file format"), 01985 sizeof(MatroskaDemuxContext), 01986 matroska_probe, 01987 matroska_read_header, 01988 matroska_read_packet, 01989 matroska_read_close, 01990 matroska_read_seek, 01991 };