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FFmpeg/libavformat/matroskadec.c

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/*
* 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 <rbultje@ronald.bitfreak.net>
* with a little help from Moritz Bunkus <moritz@bunkus.org>
* totally reworked by Aurelien Jacobs <aurel@gnuage.org>
* 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 <zlib.h>
#endif
#ifdef CONFIG_BZLIB
#include <bzlib.h>
#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; j<list->nb_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; i<seekhead_list->nb_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; profile<ARRAY_SIZE(aac_profiles); profile++)
if (strstr(codec_id, aac_profiles[profile]))
break;
return profile + 1;
}
static int matroska_aac_sri(int samplerate)
{
int sri;
for (sri=0; sri<ARRAY_SIZE(ff_mpeg4audio_sample_rates); sri++)
if (ff_mpeg4audio_sample_rates[sri] == samplerate)
break;
return sri;
}
static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MatroskaDemuxContext *matroska = s->priv_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; j<attachements_list->nb_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; i<chapters_list->nb_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; i<index_list->nb_elem; i++) {
EbmlList *pos_list = &index[i].pos;
MatroskaIndexPos *pos = pos_list->elem;
for (j=0; j<pos_list->nb_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, 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; x<h/2; x++)
memcpy(track->audio.buf+x*2*w+y*cfs,
data+x*cfs, cfs);
else
for (x=0; x<w/sps; x++)
memcpy(track->audio.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; i<blocks_list->nb_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, 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;
if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
if (st->nb_index_entries)
url_fseek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
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,
};