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