/* * Matroska file demuxer * Copyright (c) 2003-2008 The FFmpeg Project * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file matroskadec.c * Matroska file demuxer * by Ronald Bultje * with a little help from Moritz Bunkus * totally reworked by Aurelien Jacobs * Specs available on the Matroska project page: http://www.matroska.org/. */ #include "avformat.h" /* For codec_get_id(). */ #include "riff.h" #include "isom.h" #include "matroska.h" #include "libavcodec/mpeg4audio.h" #include "libavutil/intfloat_readwrite.h" #include "libavutil/avstring.h" #include "libavutil/lzo.h" #ifdef CONFIG_ZLIB #include #endif #ifdef CONFIG_BZLIB #include #endif typedef enum { EBML_NONE, EBML_UINT, EBML_FLOAT, EBML_STR, EBML_UTF8, EBML_BIN, EBML_NEST, EBML_PASS, EBML_STOP, } EbmlType; typedef const struct EbmlSyntax { uint32_t id; EbmlType type; int list_elem_size; int data_offset; union { uint64_t u; double f; const char *s; const struct EbmlSyntax *n; } def; } EbmlSyntax; typedef struct { int nb_elem; void *elem; } EbmlList; typedef struct { int size; uint8_t *data; int64_t pos; } EbmlBin; typedef struct { uint64_t version; uint64_t max_size; uint64_t id_length; char *doctype; uint64_t doctype_version; } Ebml; typedef struct { uint64_t algo; EbmlBin settings; } MatroskaTrackCompression; typedef struct { uint64_t scope; uint64_t type; MatroskaTrackCompression compression; } MatroskaTrackEncoding; typedef struct { double frame_rate; uint64_t display_width; uint64_t display_height; uint64_t pixel_width; uint64_t pixel_height; uint64_t fourcc; } MatroskaTrackVideo; typedef struct { double samplerate; double out_samplerate; uint64_t bitdepth; uint64_t channels; /* real audio header (extracted from extradata) */ int coded_framesize; int sub_packet_h; int frame_size; int sub_packet_size; int sub_packet_cnt; int pkt_cnt; uint8_t *buf; } MatroskaTrackAudio; typedef struct { uint64_t num; uint64_t type; char *codec_id; EbmlBin codec_priv; char *language; double time_scale; uint64_t default_duration; uint64_t flag_default; MatroskaTrackVideo video; MatroskaTrackAudio audio; EbmlList encodings; AVStream *stream; } MatroskaTrack; typedef struct { char *filename; char *mime; EbmlBin bin; } MatroskaAttachement; typedef struct { uint64_t start; uint64_t end; uint64_t uid; char *title; } MatroskaChapter; typedef struct { uint64_t track; uint64_t pos; } MatroskaIndexPos; typedef struct { uint64_t time; EbmlList pos; } MatroskaIndex; typedef struct { char *name; char *string; EbmlList sub; } MatroskaTag; typedef struct { uint64_t id; uint64_t pos; } MatroskaSeekhead; typedef struct { uint64_t start; uint64_t length; } MatroskaLevel; typedef struct { AVFormatContext *ctx; /* EBML stuff */ int num_levels; MatroskaLevel levels[EBML_MAX_DEPTH]; int level_up; uint64_t time_scale; double duration; char *title; EbmlList tracks; EbmlList attachments; EbmlList chapters; EbmlList index; EbmlList tags; EbmlList seekhead; /* byte position of the segment inside the stream */ offset_t segment_start; /* the packet queue */ AVPacket **packets; int num_packets; AVStream *vstream; int done; int has_cluster_id; /* What to skip before effectively reading a packet. */ int skip_to_keyframe; AVStream *skip_to_stream; } MatroskaDemuxContext; typedef struct { uint64_t duration; int64_t reference; EbmlBin bin; } MatroskaBlock; typedef struct { uint64_t timecode; EbmlList blocks; } MatroskaCluster; #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x)) static EbmlSyntax ebml_header[] = { { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} }, { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} }, { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} }, { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} }, { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} }, { EBML_ID_EBMLVERSION, EBML_NONE }, { EBML_ID_DOCTYPEVERSION, EBML_NONE }, { 0 } }; static EbmlSyntax ebml_syntax[] = { { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} }, { 0 } }; static EbmlSyntax matroska_info[] = { { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} }, { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) }, { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) }, { MATROSKA_ID_WRITINGAPP, EBML_NONE }, { MATROSKA_ID_MUXINGAPP, EBML_NONE }, { MATROSKA_ID_DATEUTC, EBML_NONE }, { MATROSKA_ID_SEGMENTUID, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_track_video[] = { { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) }, { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) }, { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) }, { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) }, { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) }, { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) }, { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE }, { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE }, { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE }, { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE }, { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE }, { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE }, { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE }, { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_track_audio[] = { { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} }, { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) }, { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) }, { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} }, { 0 } }; static EbmlSyntax matroska_track_encoding_compression[] = { { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} }, { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) }, { 0 } }; static EbmlSyntax matroska_track_encoding[] = { { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} }, { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} }, { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} }, { MATROSKA_ID_ENCODINGORDER, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_track_encodings[] = { { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} }, { 0 } }; static EbmlSyntax matroska_track[] = { { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) }, { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) }, { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) }, { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) }, { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} }, { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) }, { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} }, { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} }, { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} }, { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} }, { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} }, { MATROSKA_ID_TRACKUID, EBML_NONE }, { MATROSKA_ID_TRACKNAME, EBML_NONE }, { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE }, { MATROSKA_ID_TRACKFLAGFORCED, EBML_NONE }, { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE }, { MATROSKA_ID_CODECNAME, EBML_NONE }, { MATROSKA_ID_CODECDECODEALL, EBML_NONE }, { MATROSKA_ID_CODECINFOURL, EBML_NONE }, { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE }, { MATROSKA_ID_TRACKMINCACHE, EBML_NONE }, { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE }, { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_tracks[] = { { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} }, { 0 } }; static EbmlSyntax matroska_attachment[] = { { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) }, { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) }, { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) }, { MATROSKA_ID_FILEDESC, EBML_NONE }, { MATROSKA_ID_FILEUID, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_attachments[] = { { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} }, { 0 } }; static EbmlSyntax matroska_chapter_display[] = { { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) }, { MATROSKA_ID_CHAPLANG, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_chapter_entry[] = { { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} }, { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} }, { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) }, { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} }, { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE }, { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE }, { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE }, { MATROSKA_ID_CHAPTERATOM, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_chapter[] = { { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} }, { MATROSKA_ID_EDITIONUID, EBML_NONE }, { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE }, { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE }, { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_chapters[] = { { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} }, { 0 } }; static EbmlSyntax matroska_index_pos[] = { { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) }, { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) }, { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_index_entry[] = { { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) }, { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} }, { 0 } }; static EbmlSyntax matroska_index[] = { { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} }, { 0 } }; static EbmlSyntax matroska_simpletag[] = { { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) }, { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) }, { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} }, { MATROSKA_ID_TAGLANG, EBML_NONE }, { MATROSKA_ID_TAGDEFAULT, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_tag[] = { { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), 0, {.n=matroska_simpletag} }, { MATROSKA_ID_TAGTARGETS, EBML_NONE }, { 0 } }; static EbmlSyntax matroska_tags[] = { { MATROSKA_ID_TAG, EBML_NEST, 0, offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} }, { 0 } }; static EbmlSyntax matroska_seekhead_entry[] = { { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) }, { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} }, { 0 } }; static EbmlSyntax matroska_seekhead[] = { { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} }, { 0 } }; static EbmlSyntax matroska_segment[] = { { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } }, { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } }, { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} }, { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } }, { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } }, { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } }, { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } }, { MATROSKA_ID_CLUSTER, EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) }, { 0 } }; static EbmlSyntax matroska_segments[] = { { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } }, { 0 } }; static EbmlSyntax matroska_blockgroup[] = { { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) }, { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} }, { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) }, { 0 } }; static EbmlSyntax matroska_cluster[] = { { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) }, { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} }, { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} }, { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE }, { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE }, { 0 } }; static EbmlSyntax matroska_clusters[] = { { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} }, { MATROSKA_ID_INFO, EBML_NONE }, { MATROSKA_ID_CUES, EBML_NONE }, { MATROSKA_ID_TAGS, EBML_NONE }, { MATROSKA_ID_SEEKHEAD, EBML_NONE }, { 0 } }; #define SIZE_OFF(x) sizeof(((AVFormatContext*)0)->x),offsetof(AVFormatContext,x) const struct { const char name[16]; int size; int offset; } metadata[] = { { "TITLE", SIZE_OFF(title) }, { "ARTIST", SIZE_OFF(author) }, { "WRITTEN_BY", SIZE_OFF(author) }, { "LEAD_PERFORMER", SIZE_OFF(author) }, { "COPYRIGHT", SIZE_OFF(copyright) }, { "COMMENT", SIZE_OFF(comment) }, { "ALBUM", SIZE_OFF(album) }, { "DATE_WRITTEN", SIZE_OFF(year) }, { "DATE_RELEASED", SIZE_OFF(year) }, { "PART_NUMBER", SIZE_OFF(track) }, { "GENRE", SIZE_OFF(genre) }, }; /* * Return: Whether we reached the end of a level in the hierarchy or not. */ static int ebml_level_end(MatroskaDemuxContext *matroska) { ByteIOContext *pb = matroska->ctx->pb; offset_t pos = url_ftell(pb); if (matroska->num_levels > 0) { MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1]; if (pos - level->start >= level->length) { matroska->num_levels--; return 1; } } return 0; } /* * Read: an "EBML number", which is defined as a variable-length * array of bytes. The first byte indicates the length by giving a * number of 0-bits followed by a one. The position of the first * "one" bit inside the first byte indicates the length of this * number. * Returns: number of bytes read, < 0 on error */ static int ebml_read_num(MatroskaDemuxContext *matroska, ByteIOContext *pb, int max_size, uint64_t *number) { int len_mask = 0x80, read = 1, n = 1; int64_t total = 0; /* The first byte tells us the length in bytes - get_byte() can normally * return 0, but since that's not a valid first ebmlID byte, we can * use it safely here to catch EOS. */ if (!(total = get_byte(pb))) { /* we might encounter EOS here */ if (!url_feof(pb)) { offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); } return AVERROR(EIO); /* EOS or actual I/O error */ } /* get the length of the EBML number */ while (read <= max_size && !(total & len_mask)) { read++; len_mask >>= 1; } if (read > max_size) { offset_t pos = url_ftell(pb) - 1; av_log(matroska->ctx, AV_LOG_ERROR, "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", (uint8_t) total, pos, pos); return AVERROR_INVALIDDATA; } /* read out length */ total &= ~len_mask; while (n++ < read) total = (total << 8) | get_byte(pb); *number = total; return read; } /* * Read the next element as an unsigned int. * 0 is success, < 0 is failure. */ static int ebml_read_uint(ByteIOContext *pb, int size, uint64_t *num) { int n = 0; if (size < 1 || size > 8) return AVERROR_INVALIDDATA; /* big-endian ordering; build up number */ *num = 0; while (n++ < size) *num = (*num << 8) | get_byte(pb); return 0; } /* * Read the next element as a float. * 0 is success, < 0 is failure. */ static int ebml_read_float(ByteIOContext *pb, int size, double *num) { if (size == 4) { *num= av_int2flt(get_be32(pb)); } else if(size==8){ *num= av_int2dbl(get_be64(pb)); } else return AVERROR_INVALIDDATA; return 0; } /* * Read the next element as an ASCII string. * 0 is success, < 0 is failure. */ static int ebml_read_ascii(ByteIOContext *pb, int size, char **str) { av_free(*str); /* EBML strings are usually not 0-terminated, so we allocate one * byte more, read the string and NULL-terminate it ourselves. */ if (!(*str = av_malloc(size + 1))) return AVERROR(ENOMEM); if (get_buffer(pb, (uint8_t *) *str, size) != size) { av_free(*str); return AVERROR(EIO); } (*str)[size] = '\0'; return 0; } /* * Read the next element as binary data. * 0 is success, < 0 is failure. */ static int ebml_read_binary(ByteIOContext *pb, int length, EbmlBin *bin) { av_free(bin->data); if (!(bin->data = av_malloc(length))) return AVERROR(ENOMEM); bin->size = length; bin->pos = url_ftell(pb); if (get_buffer(pb, bin->data, length) != length) return AVERROR(EIO); return 0; } /* * Read the next element, but only the header. The contents * are supposed to be sub-elements which can be read separately. * 0 is success, < 0 is failure. */ static int ebml_read_master(MatroskaDemuxContext *matroska, int length) { ByteIOContext *pb = matroska->ctx->pb; MatroskaLevel *level; if (matroska->num_levels >= EBML_MAX_DEPTH) { av_log(matroska->ctx, AV_LOG_ERROR, "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH); return AVERROR(ENOSYS); } level = &matroska->levels[matroska->num_levels++]; level->start = url_ftell(pb); level->length = length; return 0; } /* * Read signed/unsigned "EBML" numbers. * Return: number of bytes processed, < 0 on error */ static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num) { ByteIOContext pb; init_put_byte(&pb, data, size, 0, NULL, NULL, NULL, NULL); return ebml_read_num(matroska, &pb, 8, num); } /* * Same as above, but signed. */ static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num) { uint64_t unum; int res; /* read as unsigned number first */ if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0) return res; /* make signed (weird way) */ *num = unum - ((1LL << (7*res - 1)) - 1); return res; } static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data); static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data) { int i; for (i=0; syntax[i].id; i++) if (id == syntax[i].id) break; if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id); return ebml_parse_elem(matroska, &syntax[i], data); } static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data) { uint64_t id; int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id); id |= 1 << 7*res; return res < 0 ? res : ebml_parse_id(matroska, syntax, id, data); } static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data) { int i, res = 0; for (i=0; syntax[i].id; i++) switch (syntax[i].type) { case EBML_UINT: *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u; break; case EBML_FLOAT: *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f; break; case EBML_STR: case EBML_UTF8: *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s); break; } while (!res && !ebml_level_end(matroska)) res = ebml_parse(matroska, syntax, data); return res; } static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data) { ByteIOContext *pb = matroska->ctx->pb; uint32_t id = syntax->id; uint64_t length; int res; data = (char *)data + syntax->data_offset; if (syntax->list_elem_size) { EbmlList *list = data; list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size); data = (char*)list->elem + list->nb_elem*syntax->list_elem_size; memset(data, 0, syntax->list_elem_size); list->nb_elem++; } if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) if ((res = ebml_read_num(matroska, pb, 8, &length)) < 0) return res; switch (syntax->type) { case EBML_UINT: res = ebml_read_uint (pb, length, data); break; case EBML_FLOAT: res = ebml_read_float (pb, length, data); break; case EBML_STR: case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break; case EBML_BIN: res = ebml_read_binary(pb, length, data); break; case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0) return res; if (id == MATROSKA_ID_SEGMENT) matroska->segment_start = url_ftell(matroska->ctx->pb); return ebml_parse_nest(matroska, syntax->def.n, data); case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data); case EBML_STOP: *(int *)data = 1; return 1; default: return url_fseek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0; } if (res == AVERROR_INVALIDDATA) av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n"); else if (res == AVERROR(EIO)) av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n"); return res; } static void ebml_free(EbmlSyntax *syntax, void *data) { int i, j; for (i=0; syntax[i].id; i++) { void *data_off = (char *)data + syntax[i].data_offset; switch (syntax[i].type) { case EBML_STR: case EBML_UTF8: av_freep(data_off); break; case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break; case EBML_NEST: if (syntax[i].list_elem_size) { EbmlList *list = data_off; char *ptr = list->elem; for (j=0; jnb_elem; j++, ptr+=syntax[i].list_elem_size) ebml_free(syntax[i].def.n, ptr); av_free(list->elem); } else ebml_free(syntax[i].def.n, data_off); default: break; } } } /* * Autodetecting... */ static int matroska_probe(AVProbeData *p) { uint64_t total = 0; int len_mask = 0x80, size = 1, n = 1; static const char probe_data[] = "matroska"; /* EBML header? */ if (AV_RB32(p->buf) != EBML_ID_HEADER) return 0; /* length of header */ total = p->buf[4]; while (size <= 8 && !(total & len_mask)) { size++; len_mask >>= 1; } if (size > 8) return 0; total &= (len_mask - 1); while (n < size) total = (total << 8) | p->buf[4 + n++]; /* Does the probe data contain the whole header? */ if (p->buf_size < 4 + size + total) return 0; /* The header must contain the document type 'matroska'. For now, * we don't parse the whole header but simply check for the * availability of that array of characters inside the header. * Not fully fool-proof, but good enough. */ for (n = 4+size; n <= 4+size+total-(sizeof(probe_data)-1); n++) if (!memcmp(p->buf+n, probe_data, sizeof(probe_data)-1)) return AVPROBE_SCORE_MAX; return 0; } static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num) { MatroskaTrack *tracks = matroska->tracks.elem; int i; for (i=0; i < matroska->tracks.nb_elem; i++) if (tracks[i].num == num) return &tracks[i]; av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num); return NULL; } static int matroska_decode_buffer(uint8_t** buf, int* buf_size, MatroskaTrack *track) { MatroskaTrackEncoding *encodings = track->encodings.elem; uint8_t* data = *buf; int isize = *buf_size; uint8_t* pkt_data = NULL; int pkt_size = isize; int result = 0; int olen; switch (encodings[0].compression.algo) { case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: return encodings[0].compression.settings.size; case MATROSKA_TRACK_ENCODING_COMP_LZO: do { olen = pkt_size *= 3; pkt_data = av_realloc(pkt_data, pkt_size+LZO_OUTPUT_PADDING); result = lzo1x_decode(pkt_data, &olen, data, &isize); } while (result==LZO_OUTPUT_FULL && pkt_size<10000000); if (result) goto failed; pkt_size -= olen; break; #ifdef CONFIG_ZLIB case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { z_stream zstream = {0}; if (inflateInit(&zstream) != Z_OK) return -1; zstream.next_in = data; zstream.avail_in = isize; do { pkt_size *= 3; pkt_data = av_realloc(pkt_data, pkt_size); zstream.avail_out = pkt_size - zstream.total_out; zstream.next_out = pkt_data + zstream.total_out; result = inflate(&zstream, Z_NO_FLUSH); } while (result==Z_OK && pkt_size<10000000); pkt_size = zstream.total_out; inflateEnd(&zstream); if (result != Z_STREAM_END) goto failed; break; } #endif #ifdef CONFIG_BZLIB case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { bz_stream bzstream = {0}; if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) return -1; bzstream.next_in = data; bzstream.avail_in = isize; do { pkt_size *= 3; pkt_data = av_realloc(pkt_data, pkt_size); bzstream.avail_out = pkt_size - bzstream.total_out_lo32; bzstream.next_out = pkt_data + bzstream.total_out_lo32; result = BZ2_bzDecompress(&bzstream); } while (result==BZ_OK && pkt_size<10000000); pkt_size = bzstream.total_out_lo32; BZ2_bzDecompressEnd(&bzstream); if (result != BZ_STREAM_END) goto failed; break; } #endif default: return -1; } *buf = pkt_data; *buf_size = pkt_size; return 0; failed: av_free(pkt_data); return -1; } static void matroska_convert_tags(AVFormatContext *s, EbmlList *list) { MatroskaTag *tags = list->elem; int i, j; for (i=0; i < list->nb_elem; i++) { for (j=0; j < ARRAY_SIZE(metadata); j++){ if (!strcmp(tags[i].name, metadata[j].name)) { int *ptr = (int *)((char *)s + metadata[j].offset); if (*ptr) continue; if (metadata[j].size > sizeof(int)) av_strlcpy((char *)ptr, tags[i].string, metadata[j].size); else *ptr = atoi(tags[i].string); } } if (tags[i].sub.nb_elem) matroska_convert_tags(s, &tags[i].sub); } } static void matroska_execute_seekhead(MatroskaDemuxContext *matroska) { EbmlList *seekhead_list = &matroska->seekhead; MatroskaSeekhead *seekhead = seekhead_list->elem; uint32_t level_up = matroska->level_up; offset_t before_pos = url_ftell(matroska->ctx->pb); MatroskaLevel level; int i; for (i=0; inb_elem; i++) { offset_t offset = seekhead[i].pos + matroska->segment_start; if (seekhead[i].pos <= before_pos || seekhead[i].id == MATROSKA_ID_SEEKHEAD || seekhead[i].id == MATROSKA_ID_CLUSTER) continue; /* seek */ if (url_fseek(matroska->ctx->pb, offset, SEEK_SET) != offset) continue; /* We don't want to lose our seekhead level, so we add * a dummy. This is a crude hack. */ if (matroska->num_levels == EBML_MAX_DEPTH) { av_log(matroska->ctx, AV_LOG_INFO, "Max EBML element depth (%d) reached, " "cannot parse further.\n", EBML_MAX_DEPTH); break; } level.start = 0; level.length = (uint64_t)-1; matroska->levels[matroska->num_levels] = level; matroska->num_levels++; ebml_parse(matroska, matroska_segment, matroska); /* remove dummy level */ while (matroska->num_levels) { uint64_t length = matroska->levels[--matroska->num_levels].length; if (length == (uint64_t)-1) break; } } /* seek back */ url_fseek(matroska->ctx->pb, before_pos, SEEK_SET); matroska->level_up = level_up; } static int matroska_aac_profile(char *codec_id) { static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" }; int profile; for (profile=0; profilepriv_data; EbmlList *attachements_list = &matroska->attachments; MatroskaAttachement *attachements; EbmlList *chapters_list = &matroska->chapters; MatroskaChapter *chapters; MatroskaTrack *tracks; EbmlList *index_list; MatroskaIndex *index; Ebml ebml = { 0 }; AVStream *st; int i, j; matroska->ctx = s; /* First read the EBML header. */ if (ebml_parse(matroska, ebml_syntax, &ebml) || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t) || ebml.id_length > sizeof(uint32_t) || strcmp(ebml.doctype, "matroska") || ebml.doctype_version > 2) { av_log(matroska->ctx, AV_LOG_ERROR, "EBML header using unsupported features\n" "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", ebml.version, ebml.doctype, ebml.doctype_version); return AVERROR_NOFMT; } ebml_free(ebml_syntax, &ebml); /* The next thing is a segment. */ if (ebml_parse(matroska, matroska_segments, matroska) < 0) return -1; matroska_execute_seekhead(matroska); if (matroska->duration) matroska->ctx->duration = matroska->duration * matroska->time_scale * 1000 / AV_TIME_BASE; if (matroska->title) strncpy(matroska->ctx->title, matroska->title, sizeof(matroska->ctx->title)-1); matroska_convert_tags(s, &matroska->tags); tracks = matroska->tracks.elem; for (i=0; i < matroska->tracks.nb_elem; i++) { MatroskaTrack *track = &tracks[i]; enum CodecID codec_id = CODEC_ID_NONE; EbmlList *encodings_list = &tracks->encodings; MatroskaTrackEncoding *encodings = encodings_list->elem; uint8_t *extradata = NULL; int extradata_size = 0; int extradata_offset = 0; /* Apply some sanity checks. */ if (track->type != MATROSKA_TRACK_TYPE_VIDEO && track->type != MATROSKA_TRACK_TYPE_AUDIO && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { av_log(matroska->ctx, AV_LOG_INFO, "Unknown or unsupported track type %"PRIu64"\n", track->type); continue; } if (track->codec_id == NULL) continue; if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { if (!track->default_duration) track->default_duration = 1000000000/track->video.frame_rate; if (!track->video.display_width) track->video.display_width = track->video.pixel_width; if (!track->video.display_height) track->video.display_height = track->video.pixel_height; } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { if (!track->audio.out_samplerate) track->audio.out_samplerate = track->audio.samplerate; } if (encodings_list->nb_elem > 1) { av_log(matroska->ctx, AV_LOG_ERROR, "Multiple combined encodings no supported"); } else if (encodings_list->nb_elem == 1) { if (encodings[0].type || (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && #ifdef CONFIG_ZLIB encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB && #endif #ifdef CONFIG_BZLIB encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB && #endif encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) { encodings[0].scope = 0; av_log(matroska->ctx, AV_LOG_ERROR, "Unsupported encoding type"); } else if (track->codec_priv.size && encodings[0].scope&2) { uint8_t *codec_priv = track->codec_priv.data; int offset = matroska_decode_buffer(&track->codec_priv.data, &track->codec_priv.size, track); if (offset < 0) { track->codec_priv.data = NULL; track->codec_priv.size = 0; av_log(matroska->ctx, AV_LOG_ERROR, "Failed to decode codec private data\n"); } else if (offset > 0) { track->codec_priv.data = av_malloc(track->codec_priv.size + offset); memcpy(track->codec_priv.data, encodings[0].compression.settings.data, offset); memcpy(track->codec_priv.data+offset, codec_priv, track->codec_priv.size); track->codec_priv.size += offset; } if (codec_priv != track->codec_priv.data) av_free(codec_priv); } } for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, strlen(ff_mkv_codec_tags[j].str))){ codec_id= ff_mkv_codec_tags[j].id; break; } } st = track->stream = av_new_stream(s, 0); if (st == NULL) return AVERROR(ENOMEM); if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") && track->codec_priv.size >= 40 && track->codec_priv.data != NULL) { track->video.fourcc = AV_RL32(track->codec_priv.data + 16); codec_id = codec_get_id(codec_bmp_tags, track->video.fourcc); } else if (!strcmp(track->codec_id, "A_MS/ACM") && track->codec_priv.size >= 18 && track->codec_priv.data != NULL) { uint16_t tag = AV_RL16(track->codec_priv.data); codec_id = codec_get_id(codec_wav_tags, tag); } else if (!strcmp(track->codec_id, "V_QUICKTIME") && (track->codec_priv.size >= 86) && (track->codec_priv.data != NULL)) { track->video.fourcc = AV_RL32(track->codec_priv.data); codec_id=codec_get_id(codec_movvideo_tags, track->video.fourcc); } else if (codec_id == CODEC_ID_PCM_S16BE) { switch (track->audio.bitdepth) { case 8: codec_id = CODEC_ID_PCM_U8; break; case 24: codec_id = CODEC_ID_PCM_S24BE; break; case 32: codec_id = CODEC_ID_PCM_S32BE; break; } } else if (codec_id == CODEC_ID_PCM_S16LE) { switch (track->audio.bitdepth) { case 8: codec_id = CODEC_ID_PCM_U8; break; case 24: codec_id = CODEC_ID_PCM_S24LE; break; case 32: codec_id = CODEC_ID_PCM_S32LE; break; } } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) { codec_id = CODEC_ID_PCM_F64LE; } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) { int profile = matroska_aac_profile(track->codec_id); int sri = matroska_aac_sri(track->audio.samplerate); extradata = av_malloc(5); if (extradata == NULL) return AVERROR(ENOMEM); extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3); if (strstr(track->codec_id, "SBR")) { sri = matroska_aac_sri(track->audio.out_samplerate); extradata[2] = 0x56; extradata[3] = 0xE5; extradata[4] = 0x80 | (sri<<3); extradata_size = 5; } else extradata_size = 2; } else if (codec_id == CODEC_ID_TTA) { ByteIOContext b; extradata_size = 30; extradata = av_mallocz(extradata_size); if (extradata == NULL) return AVERROR(ENOMEM); init_put_byte(&b, extradata, extradata_size, 1, NULL, NULL, NULL, NULL); put_buffer(&b, "TTA1", 4); put_le16(&b, 1); put_le16(&b, track->audio.channels); put_le16(&b, track->audio.bitdepth); put_le32(&b, track->audio.out_samplerate); put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate); } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { extradata_offset = 26; track->codec_priv.size -= extradata_offset; } else if (codec_id == CODEC_ID_RA_144) { track->audio.out_samplerate = 8000; track->audio.channels = 1; } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || codec_id == CODEC_ID_ATRAC3) { ByteIOContext b; init_put_byte(&b, track->codec_priv.data,track->codec_priv.size, 0, NULL, NULL, NULL, NULL); url_fskip(&b, 24); track->audio.coded_framesize = get_be32(&b); url_fskip(&b, 12); track->audio.sub_packet_h = get_be16(&b); track->audio.frame_size = get_be16(&b); track->audio.sub_packet_size = get_be16(&b); track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h); if (codec_id == CODEC_ID_RA_288) { st->codec->block_align = track->audio.coded_framesize; track->codec_priv.size = 0; } else { st->codec->block_align = track->audio.sub_packet_size; extradata_offset = 78; track->codec_priv.size -= extradata_offset; } } if (codec_id == CODEC_ID_NONE) av_log(matroska->ctx, AV_LOG_INFO, "Unknown/unsupported CodecID %s.\n", track->codec_id); av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ st->codec->codec_id = codec_id; st->start_time = 0; if (strcmp(track->language, "und")) av_strlcpy(st->language, track->language, 4); if (track->flag_default) st->disposition |= AV_DISPOSITION_DEFAULT; if (track->default_duration) av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, track->default_duration, 1000000000, 30000); if(extradata){ st->codec->extradata = extradata; st->codec->extradata_size = extradata_size; } else if(track->codec_priv.data && track->codec_priv.size > 0){ st->codec->extradata = av_malloc(track->codec_priv.size); if(st->codec->extradata == NULL) return AVERROR(ENOMEM); st->codec->extradata_size = track->codec_priv.size; memcpy(st->codec->extradata, track->codec_priv.data + extradata_offset, track->codec_priv.size); } if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { if (!matroska->vstream) matroska->vstream = st; st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_tag = track->video.fourcc; st->codec->width = track->video.pixel_width; st->codec->height = track->video.pixel_height; av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, st->codec->height * track->video.display_width, st->codec-> width * track->video.display_height, 255); st->need_parsing = AVSTREAM_PARSE_HEADERS; } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { st->codec->codec_type = CODEC_TYPE_AUDIO; st->codec->sample_rate = track->audio.out_samplerate; st->codec->channels = track->audio.channels; } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { st->codec->codec_type = CODEC_TYPE_SUBTITLE; } } attachements = attachements_list->elem; for (j=0; jnb_elem; j++) { if (!(attachements[j].filename && attachements[j].mime && attachements[j].bin.data && attachements[j].bin.size > 0)) { av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); } else { AVStream *st = av_new_stream(s, 0); if (st == NULL) break; st->filename = av_strdup(attachements[j].filename); st->codec->codec_id = CODEC_ID_NONE; st->codec->codec_type = CODEC_TYPE_ATTACHMENT; st->codec->extradata = av_malloc(attachements[j].bin.size); if(st->codec->extradata == NULL) break; st->codec->extradata_size = attachements[j].bin.size; memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size); for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime, strlen(ff_mkv_mime_tags[i].str))) { st->codec->codec_id = ff_mkv_mime_tags[i].id; break; } } } } chapters = chapters_list->elem; for (i=0; inb_elem; i++) if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid) ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000}, chapters[i].start, chapters[i].end, chapters[i].title); index_list = &matroska->index; index = index_list->elem; for (i=0; inb_elem; i++) { EbmlList *pos_list = &index[i].pos; MatroskaIndexPos *pos = pos_list->elem; for (j=0; jnb_elem; j++) { MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track); if (track && track->stream) av_add_index_entry(track->stream, pos[j].pos + matroska->segment_start, index[i].time*matroska->time_scale/AV_TIME_BASE, 0, 0, AVINDEX_KEYFRAME); } } return 0; } /* * Put one packet in an application-supplied AVPacket struct. * Returns 0 on success or -1 on failure. */ static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt) { if (matroska->num_packets > 0) { memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); av_free(matroska->packets[0]); if (matroska->num_packets > 1) { memmove(&matroska->packets[0], &matroska->packets[1], (matroska->num_packets - 1) * sizeof(AVPacket *)); matroska->packets = av_realloc(matroska->packets, (matroska->num_packets - 1) * sizeof(AVPacket *)); } else { av_freep(&matroska->packets); } matroska->num_packets--; return 0; } return -1; } /* * Free all packets in our internal queue. */ static void matroska_clear_queue(MatroskaDemuxContext *matroska) { if (matroska->packets) { int n; for (n = 0; n < matroska->num_packets; n++) { av_free_packet(matroska->packets[n]); av_free(matroska->packets[n]); } av_freep(&matroska->packets); matroska->num_packets = 0; } } static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t duration, int is_keyframe) { MatroskaTrack *track; int is_video_key_frame = is_keyframe, res = 0; AVStream *st; AVPacket *pkt; int16_t block_time; uint32_t *lace_size = NULL; int n, flags, laces = 0; uint64_t num; if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) { av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); return res; } data += n; size -= n; track = matroska_find_track_by_num(matroska, num); if (size <= 3 || !track || !track->stream) { av_log(matroska->ctx, AV_LOG_INFO, "Invalid stream %"PRIu64" or size %u\n", num, size); return res; } st = track->stream; if (st->discard >= AVDISCARD_ALL) return res; if (duration == AV_NOPTS_VALUE) duration = track->default_duration / matroska->time_scale; block_time = AV_RB16(data); data += 2; flags = *data++; size -= 3; if (is_keyframe == -1) is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0; if (matroska->skip_to_keyframe) { if (!is_keyframe || st != matroska->skip_to_stream) return res; matroska->skip_to_keyframe = 0; } is_video_key_frame &= st == matroska->vstream; switch ((flags & 0x06) >> 1) { case 0x0: /* no lacing */ laces = 1; lace_size = av_mallocz(sizeof(int)); lace_size[0] = size; break; case 0x1: /* Xiph lacing */ case 0x2: /* fixed-size lacing */ case 0x3: /* EBML lacing */ assert(size>0); // size <=3 is checked before size-=3 above laces = (*data) + 1; data += 1; size -= 1; lace_size = av_mallocz(laces * sizeof(int)); switch ((flags & 0x06) >> 1) { case 0x1: /* Xiph lacing */ { uint8_t temp; uint32_t total = 0; for (n = 0; res == 0 && n < laces - 1; n++) { while (1) { if (size == 0) { res = -1; break; } temp = *data; lace_size[n] += temp; data += 1; size -= 1; if (temp != 0xff) break; } total += lace_size[n]; } lace_size[n] = size - total; break; } case 0x2: /* fixed-size lacing */ for (n = 0; n < laces; n++) lace_size[n] = size / laces; break; case 0x3: /* EBML lacing */ { uint32_t total; n = matroska_ebmlnum_uint(matroska, data, size, &num); if (n < 0) { av_log(matroska->ctx, AV_LOG_INFO, "EBML block data error\n"); break; } data += n; size -= n; total = lace_size[0] = num; for (n = 1; res == 0 && n < laces - 1; n++) { int64_t snum; int r; r = matroska_ebmlnum_sint(matroska, data, size, &snum); if (r < 0) { av_log(matroska->ctx, AV_LOG_INFO, "EBML block data error\n"); break; } data += r; size -= r; lace_size[n] = lace_size[n - 1] + snum; total += lace_size[n]; } lace_size[n] = size - total; break; } } break; } if (res == 0) { uint64_t timecode = AV_NOPTS_VALUE; if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time)) timecode = cluster_time + block_time; for (n = 0; n < laces; n++) { if (st->codec->codec_id == CODEC_ID_RA_288 || st->codec->codec_id == CODEC_ID_COOK || st->codec->codec_id == CODEC_ID_ATRAC3) { int a = st->codec->block_align; int sps = track->audio.sub_packet_size; int cfs = track->audio.coded_framesize; int h = track->audio.sub_packet_h; int y = track->audio.sub_packet_cnt; int w = track->audio.frame_size; int x; if (!track->audio.pkt_cnt) { if (st->codec->codec_id == CODEC_ID_RA_288) for (x=0; xaudio.buf+x*2*w+y*cfs, data+x*cfs, cfs); else for (x=0; xaudio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); if (++track->audio.sub_packet_cnt >= h) { track->audio.sub_packet_cnt = 0; track->audio.pkt_cnt = h*w / a; } } while (track->audio.pkt_cnt) { pkt = av_mallocz(sizeof(AVPacket)); av_new_packet(pkt, a); memcpy(pkt->data, track->audio.buf + a * (h*w / a - track->audio.pkt_cnt--), a); pkt->pos = pos; pkt->stream_index = st->index; dynarray_add(&matroska->packets,&matroska->num_packets,pkt); } } else { MatroskaTrackEncoding *encodings = track->encodings.elem; int offset = 0, pkt_size = lace_size[n]; uint8_t *pkt_data = data; if (encodings && encodings->scope & 1) { offset = matroska_decode_buffer(&pkt_data,&pkt_size, track); if (offset < 0) continue; } pkt = av_mallocz(sizeof(AVPacket)); /* XXX: prevent data copy... */ if (av_new_packet(pkt, pkt_size+offset) < 0) { av_free(pkt); res = AVERROR(ENOMEM); n = laces-1; break; } if (offset) memcpy (pkt->data, encodings->compression.settings.data, offset); memcpy (pkt->data+offset, pkt_data, pkt_size); if (pkt_data != data) av_free(pkt_data); if (n == 0) pkt->flags = is_keyframe; pkt->stream_index = st->index; pkt->pts = timecode; pkt->pos = pos; pkt->duration = duration; dynarray_add(&matroska->packets, &matroska->num_packets, pkt); } if (timecode != AV_NOPTS_VALUE) timecode = duration ? timecode + duration : AV_NOPTS_VALUE; data += lace_size[n]; } } av_free(lace_size); return res < 0 ? res : is_video_key_frame; } static int matroska_parse_cluster(MatroskaDemuxContext *matroska) { MatroskaCluster cluster = { 0 }; EbmlList *blocks_list; MatroskaBlock *blocks; int i, res, key_frame = 0; offset_t pos = url_ftell(matroska->ctx->pb); if (matroska->has_cluster_id){ /* For the first cluster we parse, its ID was already read as part of matroska_read_header(), so don't read it again */ res = ebml_parse_id(matroska, matroska_clusters, MATROSKA_ID_CLUSTER, &cluster); pos -= 4; /* sizeof the ID which was already read */ matroska->has_cluster_id = 0; } else res = ebml_parse(matroska, matroska_clusters, &cluster); blocks_list = &cluster.blocks; blocks = blocks_list->elem; for (i=0; inb_elem; i++) if (blocks[i].bin.size > 0) { res=matroska_parse_block(matroska, blocks[i].bin.data, blocks[i].bin.size, blocks[i].bin.pos, cluster.timecode, blocks[i].duration, !blocks[i].reference); key_frame |= res > 0; } if (key_frame) av_add_index_entry(matroska->vstream, pos, cluster.timecode*matroska->time_scale/AV_TIME_BASE, 0, 0, AVINDEX_KEYFRAME); ebml_free(matroska_cluster, &cluster); if (res < 0) matroska->done = 1; return res; } static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt) { MatroskaDemuxContext *matroska = s->priv_data; while (matroska_deliver_packet(matroska, pkt)) { if (matroska->done) return AVERROR(EIO); matroska_parse_cluster(matroska); } return 0; } static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) { MatroskaDemuxContext *matroska = s->priv_data; AVStream *st = s->streams[stream_index]; int index; if (timestamp < 0) timestamp = 0; while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { matroska_clear_queue(matroska); if (matroska_parse_cluster(matroska) < 0) break; } matroska_clear_queue(matroska); if (index < 0) return 0; url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET); matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); matroska->skip_to_stream = st; matroska->done = 0; av_update_cur_dts(s, st, st->index_entries[index].timestamp); return 0; } static int matroska_read_close(AVFormatContext *s) { MatroskaDemuxContext *matroska = s->priv_data; MatroskaTrack *tracks = matroska->tracks.elem; int n; matroska_clear_queue(matroska); for (n=0; n < matroska->tracks.nb_elem; n++) if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO) av_free(tracks[n].audio.buf); ebml_free(matroska_segment, matroska); return 0; } AVInputFormat matroska_demuxer = { "matroska", NULL_IF_CONFIG_SMALL("Matroska file format"), sizeof(MatroskaDemuxContext), matroska_probe, matroska_read_header, matroska_read_packet, matroska_read_close, matroska_read_seek, };