forked from KolibriOS/kolibrios
2863 lines
100 KiB
C
2863 lines
100 KiB
C
/*
|
|
* 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
|
|
* Matroska file demuxer
|
|
* @author Ronald Bultje <rbultje@ronald.bitfreak.net>
|
|
* @author with a little help from Moritz Bunkus <moritz@bunkus.org>
|
|
* @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
|
|
* @see specs available on the Matroska project page: http://www.matroska.org/
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "avio_internal.h"
|
|
/* For ff_codec_get_id(). */
|
|
#include "riff.h"
|
|
#include "isom.h"
|
|
#include "rmsipr.h"
|
|
#include "matroska.h"
|
|
#include "libavcodec/bytestream.h"
|
|
#include "libavcodec/mpeg4audio.h"
|
|
#include "libavutil/base64.h"
|
|
#include "libavutil/intfloat.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/lzo.h"
|
|
#include "libavutil/dict.h"
|
|
#if CONFIG_ZLIB
|
|
#include <zlib.h>
|
|
#endif
|
|
#if 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,
|
|
EBML_TYPE_COUNT
|
|
} 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 algo;
|
|
EbmlBin key_id;
|
|
} MatroskaTrackEncryption;
|
|
|
|
typedef struct {
|
|
uint64_t scope;
|
|
uint64_t type;
|
|
MatroskaTrackCompression compression;
|
|
MatroskaTrackEncryption encryption;
|
|
} MatroskaTrackEncoding;
|
|
|
|
typedef struct {
|
|
double frame_rate;
|
|
uint64_t display_width;
|
|
uint64_t display_height;
|
|
uint64_t pixel_width;
|
|
uint64_t pixel_height;
|
|
EbmlBin color_space;
|
|
uint64_t stereo_mode;
|
|
uint64_t alpha_mode;
|
|
} 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;
|
|
uint64_t buf_timecode;
|
|
uint8_t *buf;
|
|
} MatroskaTrackAudio;
|
|
|
|
typedef struct {
|
|
uint64_t uid;
|
|
uint64_t type;
|
|
} MatroskaTrackPlane;
|
|
|
|
typedef struct {
|
|
EbmlList combine_planes;
|
|
} MatroskaTrackOperation;
|
|
|
|
typedef struct {
|
|
uint64_t num;
|
|
uint64_t uid;
|
|
uint64_t type;
|
|
char *name;
|
|
char *codec_id;
|
|
EbmlBin codec_priv;
|
|
char *language;
|
|
double time_scale;
|
|
uint64_t default_duration;
|
|
uint64_t flag_default;
|
|
uint64_t flag_forced;
|
|
uint64_t codec_delay;
|
|
uint64_t seek_preroll;
|
|
MatroskaTrackVideo video;
|
|
MatroskaTrackAudio audio;
|
|
MatroskaTrackOperation operation;
|
|
EbmlList encodings;
|
|
|
|
AVStream *stream;
|
|
int64_t end_timecode;
|
|
int ms_compat;
|
|
uint64_t max_block_additional_id;
|
|
} MatroskaTrack;
|
|
|
|
typedef struct {
|
|
uint64_t uid;
|
|
char *filename;
|
|
char *mime;
|
|
EbmlBin bin;
|
|
|
|
AVStream *stream;
|
|
} MatroskaAttachement;
|
|
|
|
typedef struct {
|
|
uint64_t start;
|
|
uint64_t end;
|
|
uint64_t uid;
|
|
char *title;
|
|
|
|
AVChapter *chapter;
|
|
} MatroskaChapter;
|
|
|
|
typedef struct {
|
|
uint64_t track;
|
|
uint64_t pos;
|
|
} MatroskaIndexPos;
|
|
|
|
typedef struct {
|
|
uint64_t time;
|
|
EbmlList pos;
|
|
} MatroskaIndex;
|
|
|
|
typedef struct {
|
|
char *name;
|
|
char *string;
|
|
char *lang;
|
|
uint64_t def;
|
|
EbmlList sub;
|
|
} MatroskaTag;
|
|
|
|
typedef struct {
|
|
char *type;
|
|
uint64_t typevalue;
|
|
uint64_t trackuid;
|
|
uint64_t chapteruid;
|
|
uint64_t attachuid;
|
|
} MatroskaTagTarget;
|
|
|
|
typedef struct {
|
|
MatroskaTagTarget target;
|
|
EbmlList tag;
|
|
} MatroskaTags;
|
|
|
|
typedef struct {
|
|
uint64_t id;
|
|
uint64_t pos;
|
|
} MatroskaSeekhead;
|
|
|
|
typedef struct {
|
|
uint64_t start;
|
|
uint64_t length;
|
|
} MatroskaLevel;
|
|
|
|
typedef struct {
|
|
uint64_t timecode;
|
|
EbmlList blocks;
|
|
} MatroskaCluster;
|
|
|
|
typedef struct {
|
|
AVFormatContext *ctx;
|
|
|
|
/* EBML stuff */
|
|
int num_levels;
|
|
MatroskaLevel levels[EBML_MAX_DEPTH];
|
|
int level_up;
|
|
uint32_t current_id;
|
|
|
|
uint64_t time_scale;
|
|
double duration;
|
|
char *title;
|
|
EbmlBin date_utc;
|
|
EbmlList tracks;
|
|
EbmlList attachments;
|
|
EbmlList chapters;
|
|
EbmlList index;
|
|
EbmlList tags;
|
|
EbmlList seekhead;
|
|
|
|
/* byte position of the segment inside the stream */
|
|
int64_t segment_start;
|
|
|
|
/* the packet queue */
|
|
AVPacket **packets;
|
|
int num_packets;
|
|
AVPacket *prev_pkt;
|
|
|
|
int done;
|
|
|
|
/* What to skip before effectively reading a packet. */
|
|
int skip_to_keyframe;
|
|
uint64_t skip_to_timecode;
|
|
|
|
/* File has a CUES element, but we defer parsing until it is needed. */
|
|
int cues_parsing_deferred;
|
|
|
|
int current_cluster_num_blocks;
|
|
int64_t current_cluster_pos;
|
|
MatroskaCluster current_cluster;
|
|
|
|
/* File has SSA subtitles which prevent incremental cluster parsing. */
|
|
int contains_ssa;
|
|
} MatroskaDemuxContext;
|
|
|
|
typedef struct {
|
|
uint64_t duration;
|
|
int64_t reference;
|
|
uint64_t non_simple;
|
|
EbmlBin bin;
|
|
uint64_t additional_id;
|
|
EbmlBin additional;
|
|
uint64_t discard_padding;
|
|
} MatroskaBlock;
|
|
|
|
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_BIN, 0, offsetof(MatroskaDemuxContext,date_utc) },
|
|
{ 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), {.u=-1} },
|
|
{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height), {.u=-1} },
|
|
{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
|
|
{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
|
|
{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo,color_space) },
|
|
{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,stereo_mode) },
|
|
{ MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,alpha_mode) },
|
|
{ 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_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_encryption[] = {
|
|
{ MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u=0} },
|
|
{ MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
|
|
{ MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
|
|
{ MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
|
|
{ MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
|
|
{ MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
|
|
{ MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
|
|
{ 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_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding,encryption), {.n=matroska_track_encoding_encryption} },
|
|
{ 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_plane[] = {
|
|
{ MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
|
|
{ MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_track_combine_planes[] = {
|
|
{ MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n=matroska_track_plane} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_track_operation[] = {
|
|
{ MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n=matroska_track_combine_planes} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_track[] = {
|
|
{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
|
|
{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
|
|
{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
|
|
{ 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_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
|
|
{ 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_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack,operation), {.n=matroska_track_operation} },
|
|
{ MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
|
|
{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack,max_block_additional_id) },
|
|
{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack,codec_delay) },
|
|
{ MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack,seek_preroll) },
|
|
{ MATROSKA_ID_TRACKFLAGENABLED, 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 },
|
|
{ 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_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
|
|
{ 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 },
|
|
{ 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_CUERELATIVEPOSITION,EBML_NONE },
|
|
{ MATROSKA_ID_CUEDURATION, EBML_NONE },
|
|
{ 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_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
|
|
{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
|
|
{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
|
|
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_tagtargets[] = {
|
|
{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
|
|
{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
|
|
{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
|
|
{ MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
|
|
{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_tag[] = {
|
|
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
|
|
{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_tags[] = {
|
|
{ MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), 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 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_segments[] = {
|
|
{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_blockmore[] = {
|
|
{ MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
|
|
{ MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_blockadditions[] = {
|
|
{ MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n=matroska_blockmore} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_blockgroup[] = {
|
|
{ MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
|
|
{ MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, {.n=matroska_blockadditions} },
|
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
|
|
{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration) },
|
|
{ MATROSKA_ID_DISCARDPADDING, EBML_UINT, 0, offsetof(MatroskaBlock,discard_padding) },
|
|
{ MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
|
|
{ MATROSKA_ID_CODECSTATE, EBML_NONE },
|
|
{ 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
|
|
{ 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 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_cluster_incremental_parsing[] = {
|
|
{ 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 },
|
|
{ MATROSKA_ID_INFO, EBML_NONE },
|
|
{ MATROSKA_ID_CUES, EBML_NONE },
|
|
{ MATROSKA_ID_TAGS, EBML_NONE },
|
|
{ MATROSKA_ID_SEEKHEAD, EBML_NONE },
|
|
{ MATROSKA_ID_CLUSTER, EBML_STOP },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_cluster_incremental[] = {
|
|
{ MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
|
|
{ MATROSKA_ID_BLOCKGROUP, EBML_STOP },
|
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
|
|
{ MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
|
|
{ MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_clusters_incremental[] = {
|
|
{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
|
|
{ MATROSKA_ID_INFO, EBML_NONE },
|
|
{ MATROSKA_ID_CUES, EBML_NONE },
|
|
{ MATROSKA_ID_TAGS, EBML_NONE },
|
|
{ MATROSKA_ID_SEEKHEAD, EBML_NONE },
|
|
{ 0 }
|
|
};
|
|
|
|
static const char *const matroska_doctypes[] = { "matroska", "webm" };
|
|
|
|
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
|
|
{
|
|
AVIOContext *pb = matroska->ctx->pb;
|
|
uint32_t id;
|
|
matroska->current_id = 0;
|
|
matroska->num_levels = 0;
|
|
|
|
/* seek to next position to resync from */
|
|
if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
|
|
goto eof;
|
|
|
|
id = avio_rb32(pb);
|
|
|
|
// try to find a toplevel element
|
|
while (!url_feof(pb)) {
|
|
if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
|
|
id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
|
|
id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
|
|
id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
|
|
matroska->current_id = id;
|
|
return 0;
|
|
}
|
|
id = (id << 8) | avio_r8(pb);
|
|
}
|
|
eof:
|
|
matroska->done = 1;
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
/*
|
|
* Return: Whether we reached the end of a level in the hierarchy or not.
|
|
*/
|
|
static int ebml_level_end(MatroskaDemuxContext *matroska)
|
|
{
|
|
AVIOContext *pb = matroska->ctx->pb;
|
|
int64_t pos = avio_tell(pb);
|
|
|
|
if (matroska->num_levels > 0) {
|
|
MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
|
|
if (pos - level->start >= level->length || matroska->current_id) {
|
|
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, AVIOContext *pb,
|
|
int max_size, uint64_t *number)
|
|
{
|
|
int read = 1, n = 1;
|
|
uint64_t total = 0;
|
|
|
|
/* The first byte tells us the length in bytes - avio_r8() 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 = avio_r8(pb))) {
|
|
/* we might encounter EOS here */
|
|
if (!url_feof(pb)) {
|
|
int64_t pos = avio_tell(pb);
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
|
|
pos, pos);
|
|
return pb->error ? pb->error : AVERROR(EIO);
|
|
}
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
/* get the length of the EBML number */
|
|
read = 8 - ff_log2_tab[total];
|
|
if (read > max_size) {
|
|
int64_t pos = avio_tell(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 ^= 1 << ff_log2_tab[total];
|
|
while (n++ < read)
|
|
total = (total << 8) | avio_r8(pb);
|
|
|
|
*number = total;
|
|
|
|
return read;
|
|
}
|
|
|
|
/**
|
|
* Read a EBML length value.
|
|
* This needs special handling for the "unknown length" case which has multiple
|
|
* encodings.
|
|
*/
|
|
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
|
|
uint64_t *number)
|
|
{
|
|
int res = ebml_read_num(matroska, pb, 8, number);
|
|
if (res > 0 && *number + 1 == 1ULL << (7 * res))
|
|
*number = 0xffffffffffffffULL;
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as an unsigned int.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
|
|
{
|
|
int n = 0;
|
|
|
|
if (size > 8)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* big-endian ordering; build up number */
|
|
*num = 0;
|
|
while (n++ < size)
|
|
*num = (*num << 8) | avio_r8(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as a float.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_float(AVIOContext *pb, int size, double *num)
|
|
{
|
|
if (size == 0) {
|
|
*num = 0;
|
|
} else if (size == 4) {
|
|
*num = av_int2float(avio_rb32(pb));
|
|
} else if (size == 8){
|
|
*num = av_int2double(avio_rb64(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(AVIOContext *pb, int size, char **str)
|
|
{
|
|
char *res;
|
|
|
|
/* EBML strings are usually not 0-terminated, so we allocate one
|
|
* byte more, read the string and NULL-terminate it ourselves. */
|
|
if (!(res = av_malloc(size + 1)))
|
|
return AVERROR(ENOMEM);
|
|
if (avio_read(pb, (uint8_t *) res, size) != size) {
|
|
av_free(res);
|
|
return AVERROR(EIO);
|
|
}
|
|
(res)[size] = '\0';
|
|
av_free(*str);
|
|
*str = res;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as binary data.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
|
|
{
|
|
av_fast_padded_malloc(&bin->data, &bin->size, length);
|
|
if (!bin->data)
|
|
return AVERROR(ENOMEM);
|
|
|
|
bin->size = length;
|
|
bin->pos = avio_tell(pb);
|
|
if (avio_read(pb, bin->data, length) != length) {
|
|
av_freep(&bin->data);
|
|
bin->size = 0;
|
|
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, uint64_t length)
|
|
{
|
|
AVIOContext *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 = avio_tell(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)
|
|
{
|
|
AVIOContext pb;
|
|
ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
|
|
return ebml_read_num(matroska, &pb, FFMIN(size, 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 == MATROSKA_ID_CLUSTER &&
|
|
matroska->num_levels > 0 &&
|
|
matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
|
|
return 0; // we reached the end of an unknown size cluster
|
|
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);
|
|
if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
return ebml_parse_elem(matroska, &syntax[i], data);
|
|
}
|
|
|
|
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
|
|
void *data)
|
|
{
|
|
if (!matroska->current_id) {
|
|
uint64_t id;
|
|
int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
|
|
if (res < 0)
|
|
return res;
|
|
matroska->current_id = id | 1 << 7*res;
|
|
}
|
|
return ebml_parse_id(matroska, syntax, matroska->current_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:
|
|
// the default may be NULL
|
|
if (syntax[i].def.s) {
|
|
uint8_t **dst = (uint8_t**)((uint8_t*)data + syntax[i].data_offset);
|
|
*dst = av_strdup(syntax[i].def.s);
|
|
if (!*dst)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
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)
|
|
{
|
|
static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
|
|
[EBML_UINT] = 8,
|
|
[EBML_FLOAT] = 8,
|
|
// max. 16 MB for strings
|
|
[EBML_STR] = 0x1000000,
|
|
[EBML_UTF8] = 0x1000000,
|
|
// max. 256 MB for binary data
|
|
[EBML_BIN] = 0x10000000,
|
|
// no limits for anything else
|
|
};
|
|
AVIOContext *pb = matroska->ctx->pb;
|
|
uint32_t id = syntax->id;
|
|
uint64_t length;
|
|
int res;
|
|
void *newelem;
|
|
|
|
data = (char *)data + syntax->data_offset;
|
|
if (syntax->list_elem_size) {
|
|
EbmlList *list = data;
|
|
newelem = av_realloc_array(list->elem, list->nb_elem+1, syntax->list_elem_size);
|
|
if (!newelem)
|
|
return AVERROR(ENOMEM);
|
|
list->elem = newelem;
|
|
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) {
|
|
matroska->current_id = 0;
|
|
if ((res = ebml_read_length(matroska, pb, &length)) < 0)
|
|
return res;
|
|
if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
|
|
length, max_lengths[syntax->type], syntax->type);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
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 = avio_tell(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: return 1;
|
|
default:
|
|
if(ffio_limit(pb, length) != length)
|
|
return AVERROR(EIO);
|
|
return avio_skip(pb,length)<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, i;
|
|
|
|
/* 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 should contain a known document type. 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 (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
|
|
int probelen = strlen(matroska_doctypes[i]);
|
|
if (total < probelen)
|
|
continue;
|
|
for (n = 4+size; n <= 4+size+total-probelen; n++)
|
|
if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
// probably valid EBML header but no recognized doctype
|
|
return AVPROBE_SCORE_EXTENSION;
|
|
}
|
|
|
|
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;
|
|
uint8_t av_unused *newpktdata;
|
|
int pkt_size = isize;
|
|
int result = 0;
|
|
int olen;
|
|
|
|
if (pkt_size >= 10000000U)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
switch (encodings[0].compression.algo) {
|
|
case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: {
|
|
int header_size = encodings[0].compression.settings.size;
|
|
uint8_t *header = encodings[0].compression.settings.data;
|
|
|
|
if (header_size && !header) {
|
|
av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!header_size)
|
|
return 0;
|
|
|
|
pkt_size = isize + header_size;
|
|
pkt_data = av_malloc(pkt_size);
|
|
if (!pkt_data)
|
|
return AVERROR(ENOMEM);
|
|
|
|
memcpy(pkt_data, header, header_size);
|
|
memcpy(pkt_data + header_size, data, isize);
|
|
break;
|
|
}
|
|
#if CONFIG_LZO
|
|
case MATROSKA_TRACK_ENCODING_COMP_LZO:
|
|
do {
|
|
olen = pkt_size *= 3;
|
|
newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
|
|
if (!newpktdata) {
|
|
result = AVERROR(ENOMEM);
|
|
goto failed;
|
|
}
|
|
pkt_data = newpktdata;
|
|
result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
|
|
} while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
|
|
if (result) {
|
|
result = AVERROR_INVALIDDATA;
|
|
goto failed;
|
|
}
|
|
pkt_size -= olen;
|
|
break;
|
|
#endif
|
|
#if 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;
|
|
newpktdata = av_realloc(pkt_data, pkt_size);
|
|
if (!newpktdata) {
|
|
inflateEnd(&zstream);
|
|
goto failed;
|
|
}
|
|
pkt_data = newpktdata;
|
|
zstream.avail_out = pkt_size - zstream.total_out;
|
|
zstream.next_out = pkt_data + zstream.total_out;
|
|
if (pkt_data) {
|
|
result = inflate(&zstream, Z_NO_FLUSH);
|
|
} else
|
|
result = Z_MEM_ERROR;
|
|
} while (result==Z_OK && pkt_size<10000000);
|
|
pkt_size = zstream.total_out;
|
|
inflateEnd(&zstream);
|
|
if (result != Z_STREAM_END) {
|
|
if (result == Z_MEM_ERROR)
|
|
result = AVERROR(ENOMEM);
|
|
else
|
|
result = AVERROR_INVALIDDATA;
|
|
goto failed;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
#if 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;
|
|
newpktdata = av_realloc(pkt_data, pkt_size);
|
|
if (!newpktdata) {
|
|
BZ2_bzDecompressEnd(&bzstream);
|
|
goto failed;
|
|
}
|
|
pkt_data = newpktdata;
|
|
bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
|
|
bzstream.next_out = pkt_data + bzstream.total_out_lo32;
|
|
if (pkt_data) {
|
|
result = BZ2_bzDecompress(&bzstream);
|
|
} else
|
|
result = BZ_MEM_ERROR;
|
|
} while (result==BZ_OK && pkt_size<10000000);
|
|
pkt_size = bzstream.total_out_lo32;
|
|
BZ2_bzDecompressEnd(&bzstream);
|
|
if (result != BZ_STREAM_END) {
|
|
if (result == BZ_MEM_ERROR)
|
|
result = AVERROR(ENOMEM);
|
|
else
|
|
result = AVERROR_INVALIDDATA;
|
|
goto failed;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
*buf = pkt_data;
|
|
*buf_size = pkt_size;
|
|
return 0;
|
|
failed:
|
|
av_free(pkt_data);
|
|
return result;
|
|
}
|
|
|
|
#if FF_API_ASS_SSA
|
|
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
|
|
AVPacket *pkt, uint64_t display_duration)
|
|
{
|
|
AVBufferRef *line;
|
|
char *layer, *ptr = pkt->data, *end = ptr+pkt->size;
|
|
for (; *ptr!=',' && ptr<end-1; ptr++);
|
|
if (*ptr == ',')
|
|
ptr++;
|
|
layer = ptr;
|
|
for (; *ptr!=',' && ptr<end-1; ptr++);
|
|
if (*ptr == ',') {
|
|
int64_t end_pts = pkt->pts + display_duration;
|
|
int sc = matroska->time_scale * pkt->pts / 10000000;
|
|
int ec = matroska->time_scale * end_pts / 10000000;
|
|
int sh, sm, ss, eh, em, es, len;
|
|
sh = sc/360000; sc -= 360000*sh;
|
|
sm = sc/ 6000; sc -= 6000*sm;
|
|
ss = sc/ 100; sc -= 100*ss;
|
|
eh = ec/360000; ec -= 360000*eh;
|
|
em = ec/ 6000; ec -= 6000*em;
|
|
es = ec/ 100; ec -= 100*es;
|
|
*ptr++ = '\0';
|
|
len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
|
|
if (!(line = av_buffer_alloc(len)))
|
|
return;
|
|
snprintf(line->data, len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
|
|
layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
|
|
av_buffer_unref(&pkt->buf);
|
|
pkt->buf = line;
|
|
pkt->data = line->data;
|
|
pkt->size = strlen(line->data);
|
|
}
|
|
}
|
|
|
|
static int matroska_merge_packets(AVPacket *out, AVPacket *in)
|
|
{
|
|
int ret = av_grow_packet(out, in->size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
memcpy(out->data + out->size - in->size, in->data, in->size);
|
|
|
|
av_free_packet(in);
|
|
av_free(in);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
|
|
AVDictionary **metadata, char *prefix)
|
|
{
|
|
MatroskaTag *tags = list->elem;
|
|
char key[1024];
|
|
int i;
|
|
|
|
for (i=0; i < list->nb_elem; i++) {
|
|
const char *lang = tags[i].lang && strcmp(tags[i].lang, "und") ?
|
|
tags[i].lang : NULL;
|
|
|
|
if (!tags[i].name) {
|
|
av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
|
|
continue;
|
|
}
|
|
if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
|
|
else av_strlcpy(key, tags[i].name, sizeof(key));
|
|
if (tags[i].def || !lang) {
|
|
av_dict_set(metadata, key, tags[i].string, 0);
|
|
if (tags[i].sub.nb_elem)
|
|
matroska_convert_tag(s, &tags[i].sub, metadata, key);
|
|
}
|
|
if (lang) {
|
|
av_strlcat(key, "-", sizeof(key));
|
|
av_strlcat(key, lang, sizeof(key));
|
|
av_dict_set(metadata, key, tags[i].string, 0);
|
|
if (tags[i].sub.nb_elem)
|
|
matroska_convert_tag(s, &tags[i].sub, metadata, key);
|
|
}
|
|
}
|
|
ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
|
|
}
|
|
|
|
static void matroska_convert_tags(AVFormatContext *s)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
MatroskaTags *tags = matroska->tags.elem;
|
|
int i, j;
|
|
|
|
for (i=0; i < matroska->tags.nb_elem; i++) {
|
|
if (tags[i].target.attachuid) {
|
|
MatroskaAttachement *attachment = matroska->attachments.elem;
|
|
for (j=0; j<matroska->attachments.nb_elem; j++)
|
|
if (attachment[j].uid == tags[i].target.attachuid
|
|
&& attachment[j].stream)
|
|
matroska_convert_tag(s, &tags[i].tag,
|
|
&attachment[j].stream->metadata, NULL);
|
|
} else if (tags[i].target.chapteruid) {
|
|
MatroskaChapter *chapter = matroska->chapters.elem;
|
|
for (j=0; j<matroska->chapters.nb_elem; j++)
|
|
if (chapter[j].uid == tags[i].target.chapteruid
|
|
&& chapter[j].chapter)
|
|
matroska_convert_tag(s, &tags[i].tag,
|
|
&chapter[j].chapter->metadata, NULL);
|
|
} else if (tags[i].target.trackuid) {
|
|
MatroskaTrack *track = matroska->tracks.elem;
|
|
for (j=0; j<matroska->tracks.nb_elem; j++)
|
|
if (track[j].uid == tags[i].target.trackuid && track[j].stream)
|
|
matroska_convert_tag(s, &tags[i].tag,
|
|
&track[j].stream->metadata, NULL);
|
|
} else {
|
|
matroska_convert_tag(s, &tags[i].tag, &s->metadata,
|
|
tags[i].target.type);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
|
|
{
|
|
EbmlList *seekhead_list = &matroska->seekhead;
|
|
MatroskaSeekhead *seekhead = seekhead_list->elem;
|
|
uint32_t level_up = matroska->level_up;
|
|
int64_t before_pos = avio_tell(matroska->ctx->pb);
|
|
uint32_t saved_id = matroska->current_id;
|
|
MatroskaLevel level;
|
|
int64_t offset;
|
|
int ret = 0;
|
|
|
|
if (idx >= seekhead_list->nb_elem
|
|
|| seekhead[idx].id == MATROSKA_ID_SEEKHEAD
|
|
|| seekhead[idx].id == MATROSKA_ID_CLUSTER)
|
|
return 0;
|
|
|
|
/* seek */
|
|
offset = seekhead[idx].pos + matroska->segment_start;
|
|
if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
|
|
/* 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);
|
|
ret = AVERROR_INVALIDDATA;
|
|
} else {
|
|
level.start = 0;
|
|
level.length = (uint64_t)-1;
|
|
matroska->levels[matroska->num_levels] = level;
|
|
matroska->num_levels++;
|
|
matroska->current_id = 0;
|
|
|
|
ret = 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 */
|
|
avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
|
|
matroska->level_up = level_up;
|
|
matroska->current_id = saved_id;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
|
|
{
|
|
EbmlList *seekhead_list = &matroska->seekhead;
|
|
int64_t before_pos = avio_tell(matroska->ctx->pb);
|
|
int i;
|
|
|
|
// we should not do any seeking in the streaming case
|
|
if (!matroska->ctx->pb->seekable ||
|
|
(matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
|
|
return;
|
|
|
|
for (i = 0; i < seekhead_list->nb_elem; i++) {
|
|
MatroskaSeekhead *seekhead = seekhead_list->elem;
|
|
if (seekhead[i].pos <= before_pos)
|
|
continue;
|
|
|
|
// defer cues parsing until we actually need cue data.
|
|
if (seekhead[i].id == MATROSKA_ID_CUES) {
|
|
matroska->cues_parsing_deferred = 1;
|
|
continue;
|
|
}
|
|
|
|
if (matroska_parse_seekhead_entry(matroska, i) < 0) {
|
|
// mark index as broken
|
|
matroska->cues_parsing_deferred = -1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void matroska_add_index_entries(MatroskaDemuxContext *matroska) {
|
|
EbmlList *index_list;
|
|
MatroskaIndex *index;
|
|
int index_scale = 1;
|
|
int i, j;
|
|
|
|
index_list = &matroska->index;
|
|
index = index_list->elem;
|
|
if (index_list->nb_elem
|
|
&& index[0].time > 1E14/matroska->time_scale) {
|
|
av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
|
|
index_scale = matroska->time_scale;
|
|
}
|
|
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/index_scale, 0, 0,
|
|
AVINDEX_KEYFRAME);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
|
|
EbmlList *seekhead_list = &matroska->seekhead;
|
|
MatroskaSeekhead *seekhead = seekhead_list->elem;
|
|
int i;
|
|
|
|
for (i = 0; i < seekhead_list->nb_elem; i++)
|
|
if (seekhead[i].id == MATROSKA_ID_CUES)
|
|
break;
|
|
av_assert1(i <= seekhead_list->nb_elem);
|
|
|
|
if (matroska_parse_seekhead_entry(matroska, i) < 0)
|
|
matroska->cues_parsing_deferred = -1;
|
|
matroska_add_index_entries(matroska);
|
|
}
|
|
|
|
static int matroska_aac_profile(char *codec_id)
|
|
{
|
|
static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
|
|
int profile;
|
|
|
|
for (profile=0; profile<FF_ARRAY_ELEMS(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<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
|
|
if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
|
|
break;
|
|
return sri;
|
|
}
|
|
|
|
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
|
|
{
|
|
char buffer[32];
|
|
/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
|
|
time_t creation_time = date_utc / 1000000000 + 978307200;
|
|
struct tm *ptm = gmtime(&creation_time);
|
|
if (!ptm) return;
|
|
strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
|
|
av_dict_set(metadata, "creation_time", buffer, 0);
|
|
}
|
|
|
|
static int matroska_read_header(AVFormatContext *s)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
EbmlList *attachements_list = &matroska->attachments;
|
|
MatroskaAttachement *attachements;
|
|
EbmlList *chapters_list = &matroska->chapters;
|
|
MatroskaChapter *chapters;
|
|
MatroskaTrack *tracks;
|
|
uint64_t max_start = 0;
|
|
int64_t pos;
|
|
Ebml ebml = { 0 };
|
|
AVStream *st;
|
|
int i, j, k, res;
|
|
|
|
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) || ebml.doctype_version > 3 || !ebml.doctype) {
|
|
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);
|
|
ebml_free(ebml_syntax, &ebml);
|
|
return AVERROR_PATCHWELCOME;
|
|
} else if (ebml.doctype_version == 3) {
|
|
av_log(matroska->ctx, AV_LOG_WARNING,
|
|
"EBML header using unsupported features\n"
|
|
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
|
|
ebml.version, ebml.doctype, ebml.doctype_version);
|
|
}
|
|
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
|
|
if (!strcmp(ebml.doctype, matroska_doctypes[i]))
|
|
break;
|
|
if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
|
|
av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
|
|
if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
|
|
ebml_free(ebml_syntax, &ebml);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
ebml_free(ebml_syntax, &ebml);
|
|
|
|
/* The next thing is a segment. */
|
|
pos = avio_tell(matroska->ctx->pb);
|
|
res = ebml_parse(matroska, matroska_segments, matroska);
|
|
// try resyncing until we find a EBML_STOP type element.
|
|
while (res != 1) {
|
|
res = matroska_resync(matroska, pos);
|
|
if (res < 0)
|
|
return res;
|
|
pos = avio_tell(matroska->ctx->pb);
|
|
res = ebml_parse(matroska, matroska_segment, matroska);
|
|
}
|
|
matroska_execute_seekhead(matroska);
|
|
|
|
if (!matroska->time_scale)
|
|
matroska->time_scale = 1000000;
|
|
if (matroska->duration)
|
|
matroska->ctx->duration = matroska->duration * matroska->time_scale
|
|
* 1000 / AV_TIME_BASE;
|
|
av_dict_set(&s->metadata, "title", matroska->title, 0);
|
|
|
|
if (matroska->date_utc.size == 8)
|
|
matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
|
|
|
|
tracks = matroska->tracks.elem;
|
|
for (i=0; i < matroska->tracks.nb_elem; i++) {
|
|
MatroskaTrack *track = &tracks[i];
|
|
enum AVCodecID codec_id = AV_CODEC_ID_NONE;
|
|
EbmlList *encodings_list = &track->encodings;
|
|
MatroskaTrackEncoding *encodings = encodings_list->elem;
|
|
uint8_t *extradata = NULL;
|
|
int extradata_size = 0;
|
|
int extradata_offset = 0;
|
|
uint32_t fourcc = 0;
|
|
AVIOContext b;
|
|
char* key_id_base64 = NULL;
|
|
|
|
/* Apply some sanity checks. */
|
|
if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
|
|
track->type != MATROSKA_TRACK_TYPE_AUDIO &&
|
|
track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
|
|
track->type != MATROSKA_TRACK_TYPE_METADATA) {
|
|
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->video.frame_rate > 0)
|
|
track->default_duration = 1000000000/track->video.frame_rate;
|
|
if (track->video.display_width == -1)
|
|
track->video.display_width = track->video.pixel_width;
|
|
if (track->video.display_height == -1)
|
|
track->video.display_height = track->video.pixel_height;
|
|
if (track->video.color_space.size == 4)
|
|
fourcc = AV_RL32(track->video.color_space.data);
|
|
} 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 not supported");
|
|
} else if (encodings_list->nb_elem == 1) {
|
|
if (encodings[0].type) {
|
|
if (encodings[0].encryption.key_id.size > 0) {
|
|
/* Save the encryption key id to be stored later as a
|
|
metadata tag. */
|
|
const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
|
|
key_id_base64 = av_malloc(b64_size);
|
|
if (key_id_base64 == NULL)
|
|
return AVERROR(ENOMEM);
|
|
|
|
av_base64_encode(key_id_base64, b64_size,
|
|
encodings[0].encryption.key_id.data,
|
|
encodings[0].encryption.key_id.size);
|
|
} else {
|
|
encodings[0].scope = 0;
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Unsupported encoding type");
|
|
}
|
|
} else if (
|
|
#if CONFIG_ZLIB
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
|
|
#endif
|
|
#if CONFIG_BZLIB
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
|
|
#endif
|
|
#if CONFIG_LZO
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
|
|
#endif
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
|
|
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 ret = matroska_decode_buffer(&track->codec_priv.data,
|
|
&track->codec_priv.size,
|
|
track);
|
|
if (ret < 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");
|
|
}
|
|
|
|
if (codec_priv != track->codec_priv.data)
|
|
av_free(codec_priv);
|
|
}
|
|
}
|
|
|
|
for(j=0; ff_mkv_codec_tags[j].id != AV_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 = avformat_new_stream(s, NULL);
|
|
if (st == NULL) {
|
|
av_free(key_id_base64);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
if (key_id_base64) {
|
|
/* export encryption key id as base64 metadata tag */
|
|
av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
|
|
av_freep(&key_id_base64);
|
|
}
|
|
|
|
if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
|
|
&& track->codec_priv.size >= 40
|
|
&& track->codec_priv.data != NULL) {
|
|
track->ms_compat = 1;
|
|
fourcc = AV_RL32(track->codec_priv.data + 16);
|
|
codec_id = ff_codec_get_id(ff_codec_bmp_tags, fourcc);
|
|
extradata_offset = 40;
|
|
} else if (!strcmp(track->codec_id, "A_MS/ACM")
|
|
&& track->codec_priv.size >= 14
|
|
&& track->codec_priv.data != NULL) {
|
|
int ret;
|
|
ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
|
|
0, NULL, NULL, NULL, NULL);
|
|
ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
|
|
if (ret < 0)
|
|
return ret;
|
|
codec_id = st->codec->codec_id;
|
|
extradata_offset = FFMIN(track->codec_priv.size, 18);
|
|
} else if (!strcmp(track->codec_id, "V_QUICKTIME")
|
|
&& (track->codec_priv.size >= 86)
|
|
&& (track->codec_priv.data != NULL)) {
|
|
fourcc = AV_RL32(track->codec_priv.data);
|
|
codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
|
|
} else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
|
|
switch (track->audio.bitdepth) {
|
|
case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
|
|
case 24: codec_id = AV_CODEC_ID_PCM_S24BE; break;
|
|
case 32: codec_id = AV_CODEC_ID_PCM_S32BE; break;
|
|
}
|
|
} else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
|
|
switch (track->audio.bitdepth) {
|
|
case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
|
|
case 24: codec_id = AV_CODEC_ID_PCM_S24LE; break;
|
|
case 32: codec_id = AV_CODEC_ID_PCM_S32LE; break;
|
|
}
|
|
} else if (codec_id==AV_CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
|
|
codec_id = AV_CODEC_ID_PCM_F64LE;
|
|
} else if (codec_id == AV_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_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
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 == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
|
|
/* Only ALAC's magic cookie is stored in Matroska's track headers.
|
|
Create the "atom size", "tag", and "tag version" fields the
|
|
decoder expects manually. */
|
|
extradata_size = 12 + track->codec_priv.size;
|
|
extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (extradata == NULL)
|
|
return AVERROR(ENOMEM);
|
|
AV_WB32(extradata, extradata_size);
|
|
memcpy(&extradata[4], "alac", 4);
|
|
AV_WB32(&extradata[8], 0);
|
|
memcpy(&extradata[12], track->codec_priv.data,
|
|
track->codec_priv.size);
|
|
} else if (codec_id == AV_CODEC_ID_TTA) {
|
|
extradata_size = 30;
|
|
extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (extradata == NULL)
|
|
return AVERROR(ENOMEM);
|
|
ffio_init_context(&b, extradata, extradata_size, 1,
|
|
NULL, NULL, NULL, NULL);
|
|
avio_write(&b, "TTA1", 4);
|
|
avio_wl16(&b, 1);
|
|
avio_wl16(&b, track->audio.channels);
|
|
avio_wl16(&b, track->audio.bitdepth);
|
|
if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_wl32(&b, track->audio.out_samplerate);
|
|
avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale), track->audio.out_samplerate, AV_TIME_BASE * 1000));
|
|
} else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
|
|
codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
|
|
extradata_offset = 26;
|
|
} else if (codec_id == AV_CODEC_ID_RA_144) {
|
|
track->audio.out_samplerate = 8000;
|
|
track->audio.channels = 1;
|
|
} else if ((codec_id == AV_CODEC_ID_RA_288 || codec_id == AV_CODEC_ID_COOK ||
|
|
codec_id == AV_CODEC_ID_ATRAC3 || codec_id == AV_CODEC_ID_SIPR)
|
|
&& track->codec_priv.data) {
|
|
int flavor;
|
|
|
|
ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
|
|
0, NULL, NULL, NULL, NULL);
|
|
avio_skip(&b, 22);
|
|
flavor = avio_rb16(&b);
|
|
track->audio.coded_framesize = avio_rb32(&b);
|
|
avio_skip(&b, 12);
|
|
track->audio.sub_packet_h = avio_rb16(&b);
|
|
track->audio.frame_size = avio_rb16(&b);
|
|
track->audio.sub_packet_size = avio_rb16(&b);
|
|
if (flavor <= 0 || track->audio.coded_framesize <= 0 ||
|
|
track->audio.sub_packet_h <= 0 || track->audio.frame_size <= 0 ||
|
|
track->audio.sub_packet_size <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
track->audio.buf = av_malloc_array(track->audio.sub_packet_h, track->audio.frame_size);
|
|
if (!track->audio.buf)
|
|
return AVERROR(ENOMEM);
|
|
if (codec_id == AV_CODEC_ID_RA_288) {
|
|
st->codec->block_align = track->audio.coded_framesize;
|
|
track->codec_priv.size = 0;
|
|
} else {
|
|
if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
|
|
static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
|
|
track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
|
|
st->codec->bit_rate = sipr_bit_rate[flavor];
|
|
}
|
|
st->codec->block_align = track->audio.sub_packet_size;
|
|
extradata_offset = 78;
|
|
}
|
|
}
|
|
track->codec_priv.size -= extradata_offset;
|
|
|
|
if (codec_id == AV_CODEC_ID_NONE)
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"Unknown/unsupported AVCodecID %s.\n", track->codec_id);
|
|
|
|
if (track->time_scale < 0.01)
|
|
track->time_scale = 1.0;
|
|
avpriv_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_dict_set(&st->metadata, "language", track->language, 0);
|
|
av_dict_set(&st->metadata, "title", track->name, 0);
|
|
|
|
if (track->flag_default)
|
|
st->disposition |= AV_DISPOSITION_DEFAULT;
|
|
if (track->flag_forced)
|
|
st->disposition |= AV_DISPOSITION_FORCED;
|
|
|
|
if (!st->codec->extradata) {
|
|
if(extradata){
|
|
st->codec->extradata = extradata;
|
|
st->codec->extradata_size = extradata_size;
|
|
} else if(track->codec_priv.data && track->codec_priv.size > 0){
|
|
if (ff_alloc_extradata(st->codec, track->codec_priv.size))
|
|
return AVERROR(ENOMEM);
|
|
memcpy(st->codec->extradata,
|
|
track->codec_priv.data + extradata_offset,
|
|
track->codec_priv.size);
|
|
}
|
|
}
|
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
|
|
MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
|
|
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_tag = 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);
|
|
if (st->codec->codec_id != AV_CODEC_ID_HEVC)
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
if (track->default_duration) {
|
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
|
|
1000000000, track->default_duration, 30000);
|
|
#if FF_API_R_FRAME_RATE
|
|
if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000L)
|
|
st->r_frame_rate = st->avg_frame_rate;
|
|
#endif
|
|
}
|
|
|
|
/* export stereo mode flag as metadata tag */
|
|
if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
|
|
av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
|
|
|
|
/* export alpha mode flag as metadata tag */
|
|
if (track->video.alpha_mode)
|
|
av_dict_set(&st->metadata, "alpha_mode", "1", 0);
|
|
|
|
/* if we have virtual track, mark the real tracks */
|
|
for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
|
|
char buf[32];
|
|
if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
|
|
continue;
|
|
snprintf(buf, sizeof(buf), "%s_%d",
|
|
ff_matroska_video_stereo_plane[planes[j].type], i);
|
|
for (k=0; k < matroska->tracks.nb_elem; k++)
|
|
if (planes[j].uid == tracks[k].uid) {
|
|
av_dict_set(&s->streams[k]->metadata,
|
|
"stereo_mode", buf, 0);
|
|
break;
|
|
}
|
|
}
|
|
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->sample_rate = track->audio.out_samplerate;
|
|
st->codec->channels = track->audio.channels;
|
|
st->codec->bits_per_coded_sample = track->audio.bitdepth;
|
|
if (st->codec->codec_id != AV_CODEC_ID_AAC)
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
if (track->codec_delay > 0) {
|
|
st->codec->delay = av_rescale_q(track->codec_delay,
|
|
(AVRational){1, 1000000000},
|
|
(AVRational){1, st->codec->sample_rate});
|
|
}
|
|
if (track->seek_preroll > 0) {
|
|
av_codec_set_seek_preroll(st->codec,
|
|
av_rescale_q(track->seek_preroll,
|
|
(AVRational){1, 1000000000},
|
|
(AVRational){1, st->codec->sample_rate}));
|
|
}
|
|
} else if (codec_id == AV_CODEC_ID_WEBVTT) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
|
|
if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
|
|
st->disposition |= AV_DISPOSITION_CAPTIONS;
|
|
} else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
|
|
st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
|
|
} else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
|
|
st->disposition |= AV_DISPOSITION_METADATA;
|
|
}
|
|
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
#if FF_API_ASS_SSA
|
|
if (st->codec->codec_id == AV_CODEC_ID_SSA ||
|
|
st->codec->codec_id == AV_CODEC_ID_ASS)
|
|
#else
|
|
if (st->codec->codec_id == AV_CODEC_ID_ASS)
|
|
#endif
|
|
matroska->contains_ssa = 1;
|
|
}
|
|
}
|
|
|
|
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 = avformat_new_stream(s, NULL);
|
|
if (st == NULL)
|
|
break;
|
|
av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
|
|
av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
|
|
st->codec->codec_id = AV_CODEC_ID_NONE;
|
|
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
|
|
if (ff_alloc_extradata(st->codec, attachements[j].bin.size))
|
|
break;
|
|
memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
|
|
|
|
for (i=0; ff_mkv_mime_tags[i].id != AV_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;
|
|
}
|
|
}
|
|
attachements[j].stream = st;
|
|
}
|
|
}
|
|
|
|
chapters = chapters_list->elem;
|
|
for (i=0; i<chapters_list->nb_elem; i++)
|
|
if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
|
|
&& (max_start==0 || chapters[i].start > max_start)) {
|
|
chapters[i].chapter =
|
|
avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
|
|
chapters[i].start, chapters[i].end,
|
|
chapters[i].title);
|
|
av_dict_set(&chapters[i].chapter->metadata,
|
|
"title", chapters[i].title, 0);
|
|
max_start = chapters[i].start;
|
|
}
|
|
|
|
matroska_add_index_entries(matroska);
|
|
|
|
matroska_convert_tags(s);
|
|
|
|
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) {
|
|
void *newpackets;
|
|
memmove(&matroska->packets[0], &matroska->packets[1],
|
|
(matroska->num_packets - 1) * sizeof(AVPacket *));
|
|
newpackets = av_realloc(matroska->packets,
|
|
(matroska->num_packets - 1) * sizeof(AVPacket *));
|
|
if (newpackets)
|
|
matroska->packets = newpackets;
|
|
} else {
|
|
av_freep(&matroska->packets);
|
|
matroska->prev_pkt = NULL;
|
|
}
|
|
matroska->num_packets--;
|
|
return 0;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Free all packets in our internal queue.
|
|
*/
|
|
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
|
|
{
|
|
matroska->prev_pkt = NULL;
|
|
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_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
|
|
int* buf_size, int type,
|
|
uint32_t **lace_buf, int *laces)
|
|
{
|
|
int res = 0, n, size = *buf_size;
|
|
uint8_t *data = *buf;
|
|
uint32_t *lace_size;
|
|
|
|
if (!type) {
|
|
*laces = 1;
|
|
*lace_buf = av_mallocz(sizeof(int));
|
|
if (!*lace_buf)
|
|
return AVERROR(ENOMEM);
|
|
|
|
*lace_buf[0] = size;
|
|
return 0;
|
|
}
|
|
|
|
av_assert0(size > 0);
|
|
*laces = *data + 1;
|
|
data += 1;
|
|
size -= 1;
|
|
lace_size = av_mallocz(*laces * sizeof(int));
|
|
if (!lace_size)
|
|
return AVERROR(ENOMEM);
|
|
|
|
switch (type) {
|
|
case 0x1: /* Xiph lacing */ {
|
|
uint8_t temp;
|
|
uint32_t total = 0;
|
|
for (n = 0; res == 0 && n < *laces - 1; n++) {
|
|
while (1) {
|
|
if (size <= total) {
|
|
res = AVERROR_INVALIDDATA;
|
|
break;
|
|
}
|
|
temp = *data;
|
|
total += temp;
|
|
lace_size[n] += temp;
|
|
data += 1;
|
|
size -= 1;
|
|
if (temp != 0xff)
|
|
break;
|
|
}
|
|
}
|
|
if (size <= total) {
|
|
res = AVERROR_INVALIDDATA;
|
|
break;
|
|
}
|
|
|
|
lace_size[n] = size - total;
|
|
break;
|
|
}
|
|
|
|
case 0x2: /* fixed-size lacing */
|
|
if (size % (*laces)) {
|
|
res = AVERROR_INVALIDDATA;
|
|
break;
|
|
}
|
|
for (n = 0; n < *laces; n++)
|
|
lace_size[n] = size / *laces;
|
|
break;
|
|
|
|
case 0x3: /* EBML lacing */ {
|
|
uint64_t num;
|
|
uint64_t total;
|
|
n = matroska_ebmlnum_uint(matroska, data, size, &num);
|
|
if (n < 0 || num > INT_MAX) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"EBML block data error\n");
|
|
res = n<0 ? n : AVERROR_INVALIDDATA;
|
|
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 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"EBML block data error\n");
|
|
res = r<0 ? r : AVERROR_INVALIDDATA;
|
|
break;
|
|
}
|
|
data += r;
|
|
size -= r;
|
|
lace_size[n] = lace_size[n - 1] + snum;
|
|
total += lace_size[n];
|
|
}
|
|
if (size <= total) {
|
|
res = AVERROR_INVALIDDATA;
|
|
break;
|
|
}
|
|
lace_size[*laces - 1] = size - total;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*buf = data;
|
|
*lace_buf = lace_size;
|
|
*buf_size = size;
|
|
|
|
return res;
|
|
}
|
|
|
|
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
|
|
MatroskaTrack *track,
|
|
AVStream *st,
|
|
uint8_t *data, int size,
|
|
uint64_t timecode,
|
|
int64_t pos)
|
|
{
|
|
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 (track->audio.sub_packet_cnt == 0)
|
|
track->audio.buf_timecode = timecode;
|
|
if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
|
|
if (size < cfs * h / 2) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Corrupt int4 RM-style audio packet size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
for (x=0; x<h/2; x++)
|
|
memcpy(track->audio.buf+x*2*w+y*cfs,
|
|
data+x*cfs, cfs);
|
|
} else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
|
|
if (size < w) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Corrupt sipr RM-style audio packet size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
memcpy(track->audio.buf + y*w, data, w);
|
|
} else {
|
|
if (size < sps * w / sps || h<=0) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Corrupt generic RM-style audio packet size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
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) {
|
|
if (st->codec->codec_id == AV_CODEC_ID_SIPR)
|
|
ff_rm_reorder_sipr_data(track->audio.buf, h, w);
|
|
track->audio.sub_packet_cnt = 0;
|
|
track->audio.pkt_cnt = h*w / a;
|
|
}
|
|
}
|
|
|
|
while (track->audio.pkt_cnt) {
|
|
AVPacket *pkt = NULL;
|
|
if (!(pkt = av_mallocz(sizeof(AVPacket))) || av_new_packet(pkt, a) < 0){
|
|
av_free(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(pkt->data, track->audio.buf
|
|
+ a * (h*w / a - track->audio.pkt_cnt--), a);
|
|
pkt->pts = track->audio.buf_timecode;
|
|
track->audio.buf_timecode = AV_NOPTS_VALUE;
|
|
pkt->pos = pos;
|
|
pkt->stream_index = st->index;
|
|
dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* reconstruct full wavpack blocks from mangled matroska ones */
|
|
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
|
|
uint8_t **pdst, int *size)
|
|
{
|
|
uint8_t *dst = NULL;
|
|
int dstlen = 0;
|
|
int srclen = *size;
|
|
uint32_t samples;
|
|
uint16_t ver;
|
|
int ret, offset = 0;
|
|
|
|
if (srclen < 12 || track->stream->codec->extradata_size < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
ver = AV_RL16(track->stream->codec->extradata);
|
|
|
|
samples = AV_RL32(src);
|
|
src += 4;
|
|
srclen -= 4;
|
|
|
|
while (srclen >= 8) {
|
|
int multiblock;
|
|
uint32_t blocksize;
|
|
uint8_t *tmp;
|
|
|
|
uint32_t flags = AV_RL32(src);
|
|
uint32_t crc = AV_RL32(src + 4);
|
|
src += 8;
|
|
srclen -= 8;
|
|
|
|
multiblock = (flags & 0x1800) != 0x1800;
|
|
if (multiblock) {
|
|
if (srclen < 4) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
blocksize = AV_RL32(src);
|
|
src += 4;
|
|
srclen -= 4;
|
|
} else
|
|
blocksize = srclen;
|
|
|
|
if (blocksize > srclen) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
tmp = av_realloc(dst, dstlen + blocksize + 32);
|
|
if (!tmp) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
dst = tmp;
|
|
dstlen += blocksize + 32;
|
|
|
|
AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
|
|
AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
|
|
AV_WL16(dst + offset + 8, ver); // version
|
|
AV_WL16(dst + offset + 10, 0); // track/index_no
|
|
AV_WL32(dst + offset + 12, 0); // total samples
|
|
AV_WL32(dst + offset + 16, 0); // block index
|
|
AV_WL32(dst + offset + 20, samples); // number of samples
|
|
AV_WL32(dst + offset + 24, flags); // flags
|
|
AV_WL32(dst + offset + 28, crc); // crc
|
|
memcpy (dst + offset + 32, src, blocksize); // block data
|
|
|
|
src += blocksize;
|
|
srclen -= blocksize;
|
|
offset += blocksize + 32;
|
|
}
|
|
|
|
*pdst = dst;
|
|
*size = dstlen;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
av_freep(&dst);
|
|
return ret;
|
|
}
|
|
|
|
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
|
|
MatroskaTrack *track,
|
|
AVStream *st,
|
|
uint8_t *data, int data_len,
|
|
uint64_t timecode,
|
|
uint64_t duration,
|
|
int64_t pos)
|
|
{
|
|
AVPacket *pkt;
|
|
uint8_t *id, *settings, *text, *buf;
|
|
int id_len, settings_len, text_len;
|
|
uint8_t *p, *q;
|
|
int err;
|
|
|
|
if (data_len <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
p = data;
|
|
q = data + data_len;
|
|
|
|
id = p;
|
|
id_len = -1;
|
|
while (p < q) {
|
|
if (*p == '\r' || *p == '\n') {
|
|
id_len = p - id;
|
|
if (*p == '\r')
|
|
p++;
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if (p >= q || *p != '\n')
|
|
return AVERROR_INVALIDDATA;
|
|
p++;
|
|
|
|
settings = p;
|
|
settings_len = -1;
|
|
while (p < q) {
|
|
if (*p == '\r' || *p == '\n') {
|
|
settings_len = p - settings;
|
|
if (*p == '\r')
|
|
p++;
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if (p >= q || *p != '\n')
|
|
return AVERROR_INVALIDDATA;
|
|
p++;
|
|
|
|
text = p;
|
|
text_len = q - p;
|
|
while (text_len > 0) {
|
|
const int len = text_len - 1;
|
|
const uint8_t c = p[len];
|
|
if (c != '\r' && c != '\n')
|
|
break;
|
|
text_len = len;
|
|
}
|
|
|
|
if (text_len <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
pkt = av_mallocz(sizeof(*pkt));
|
|
err = av_new_packet(pkt, text_len);
|
|
if (err < 0) {
|
|
av_free(pkt);
|
|
return AVERROR(err);
|
|
}
|
|
|
|
memcpy(pkt->data, text, text_len);
|
|
|
|
if (id_len > 0) {
|
|
buf = av_packet_new_side_data(pkt,
|
|
AV_PKT_DATA_WEBVTT_IDENTIFIER,
|
|
id_len);
|
|
if (buf == NULL) {
|
|
av_free(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(buf, id, id_len);
|
|
}
|
|
|
|
if (settings_len > 0) {
|
|
buf = av_packet_new_side_data(pkt,
|
|
AV_PKT_DATA_WEBVTT_SETTINGS,
|
|
settings_len);
|
|
if (buf == NULL) {
|
|
av_free(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(buf, settings, settings_len);
|
|
}
|
|
|
|
// Do we need this for subtitles?
|
|
// pkt->flags = AV_PKT_FLAG_KEY;
|
|
|
|
pkt->stream_index = st->index;
|
|
pkt->pts = timecode;
|
|
|
|
// Do we need this for subtitles?
|
|
// pkt->dts = timecode;
|
|
|
|
pkt->duration = duration;
|
|
pkt->pos = pos;
|
|
|
|
dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
|
|
matroska->prev_pkt = pkt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int matroska_parse_frame(MatroskaDemuxContext *matroska,
|
|
MatroskaTrack *track,
|
|
AVStream *st,
|
|
uint8_t *data, int pkt_size,
|
|
uint64_t timecode, uint64_t lace_duration,
|
|
int64_t pos, int is_keyframe,
|
|
uint8_t *additional, uint64_t additional_id, int additional_size,
|
|
uint64_t discard_padding)
|
|
{
|
|
MatroskaTrackEncoding *encodings = track->encodings.elem;
|
|
uint8_t *pkt_data = data;
|
|
int offset = 0, res;
|
|
AVPacket *pkt;
|
|
|
|
if (encodings && !encodings->type && encodings->scope & 1) {
|
|
res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
|
|
if (res < 0)
|
|
return res;
|
|
}
|
|
|
|
if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
|
|
uint8_t *wv_data;
|
|
res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
|
|
if (res < 0) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing a wavpack block.\n");
|
|
goto fail;
|
|
}
|
|
if (pkt_data != data)
|
|
av_freep(&pkt_data);
|
|
pkt_data = wv_data;
|
|
}
|
|
|
|
if (st->codec->codec_id == AV_CODEC_ID_PRORES)
|
|
offset = 8;
|
|
|
|
pkt = av_mallocz(sizeof(AVPacket));
|
|
/* XXX: prevent data copy... */
|
|
if (av_new_packet(pkt, pkt_size + offset) < 0) {
|
|
av_free(pkt);
|
|
res = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
|
|
uint8_t *buf = pkt->data;
|
|
bytestream_put_be32(&buf, pkt_size);
|
|
bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
|
|
}
|
|
|
|
memcpy(pkt->data + offset, pkt_data, pkt_size);
|
|
|
|
if (pkt_data != data)
|
|
av_freep(&pkt_data);
|
|
|
|
pkt->flags = is_keyframe;
|
|
pkt->stream_index = st->index;
|
|
|
|
if (additional_size > 0) {
|
|
uint8_t *side_data = av_packet_new_side_data(pkt,
|
|
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
|
|
additional_size + 8);
|
|
if(side_data == NULL) {
|
|
av_free_packet(pkt);
|
|
av_free(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
AV_WB64(side_data, additional_id);
|
|
memcpy(side_data + 8, additional, additional_size);
|
|
}
|
|
|
|
if (discard_padding) {
|
|
uint8_t *side_data = av_packet_new_side_data(pkt,
|
|
AV_PKT_DATA_SKIP_SAMPLES,
|
|
10);
|
|
if(side_data == NULL) {
|
|
av_free_packet(pkt);
|
|
av_free(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
AV_WL32(side_data, 0);
|
|
AV_WL32(side_data + 4, av_rescale_q(discard_padding,
|
|
(AVRational){1, 1000000000},
|
|
(AVRational){1, st->codec->sample_rate}));
|
|
}
|
|
|
|
if (track->ms_compat)
|
|
pkt->dts = timecode;
|
|
else
|
|
pkt->pts = timecode;
|
|
pkt->pos = pos;
|
|
if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
|
|
/*
|
|
* For backward compatibility.
|
|
* Historically, we have put subtitle duration
|
|
* in convergence_duration, on the off chance
|
|
* that the time_scale is less than 1us, which
|
|
* could result in a 32bit overflow on the
|
|
* normal duration field.
|
|
*/
|
|
pkt->convergence_duration = lace_duration;
|
|
}
|
|
|
|
if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
|
|
lace_duration <= INT_MAX) {
|
|
/*
|
|
* For non subtitle tracks, just store the duration
|
|
* as normal.
|
|
*
|
|
* If it's a subtitle track and duration value does
|
|
* not overflow a uint32, then also store it normally.
|
|
*/
|
|
pkt->duration = lace_duration;
|
|
}
|
|
|
|
#if FF_API_ASS_SSA
|
|
if (st->codec->codec_id == AV_CODEC_ID_SSA)
|
|
matroska_fix_ass_packet(matroska, pkt, lace_duration);
|
|
|
|
if (matroska->prev_pkt &&
|
|
timecode != AV_NOPTS_VALUE &&
|
|
matroska->prev_pkt->pts == timecode &&
|
|
matroska->prev_pkt->stream_index == st->index &&
|
|
st->codec->codec_id == AV_CODEC_ID_SSA)
|
|
matroska_merge_packets(matroska->prev_pkt, pkt);
|
|
else {
|
|
dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
|
|
matroska->prev_pkt = pkt;
|
|
}
|
|
#else
|
|
dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
|
|
matroska->prev_pkt = pkt;
|
|
#endif
|
|
|
|
return 0;
|
|
fail:
|
|
if (pkt_data != data)
|
|
av_freep(&pkt_data);
|
|
return res;
|
|
}
|
|
|
|
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
|
|
int size, int64_t pos, uint64_t cluster_time,
|
|
uint64_t block_duration, int is_keyframe,
|
|
uint8_t *additional, uint64_t additional_id, int additional_size,
|
|
int64_t cluster_pos, uint64_t discard_padding)
|
|
{
|
|
uint64_t timecode = AV_NOPTS_VALUE;
|
|
MatroskaTrack *track;
|
|
int res = 0;
|
|
AVStream *st;
|
|
int16_t block_time;
|
|
uint32_t *lace_size = NULL;
|
|
int n, flags, laces = 0;
|
|
uint64_t num;
|
|
int trust_default_duration = 1;
|
|
|
|
if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
|
|
return n;
|
|
}
|
|
data += n;
|
|
size -= n;
|
|
|
|
track = matroska_find_track_by_num(matroska, num);
|
|
if (!track || !track->stream) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"Invalid stream %"PRIu64" or size %u\n", num, size);
|
|
return AVERROR_INVALIDDATA;
|
|
} else if (size <= 3)
|
|
return 0;
|
|
st = track->stream;
|
|
if (st->discard >= AVDISCARD_ALL)
|
|
return res;
|
|
av_assert1(block_duration != AV_NOPTS_VALUE);
|
|
|
|
block_time = sign_extend(AV_RB16(data), 16);
|
|
data += 2;
|
|
flags = *data++;
|
|
size -= 3;
|
|
if (is_keyframe == -1)
|
|
is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
|
|
|
|
if (cluster_time != (uint64_t)-1
|
|
&& (block_time >= 0 || cluster_time >= -block_time)) {
|
|
timecode = cluster_time + block_time;
|
|
if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
|
|
&& timecode < track->end_timecode)
|
|
is_keyframe = 0; /* overlapping subtitles are not key frame */
|
|
if (is_keyframe)
|
|
av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
|
|
}
|
|
|
|
if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
|
|
if (timecode < matroska->skip_to_timecode)
|
|
return res;
|
|
if (is_keyframe)
|
|
matroska->skip_to_keyframe = 0;
|
|
else if (!st->skip_to_keyframe) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
|
|
matroska->skip_to_keyframe = 0;
|
|
}
|
|
}
|
|
|
|
res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
|
|
&lace_size, &laces);
|
|
|
|
if (res)
|
|
goto end;
|
|
|
|
if (track->audio.samplerate == 8000) {
|
|
// If this is needed for more codecs, then add them here
|
|
if (st->codec->codec_id == AV_CODEC_ID_AC3) {
|
|
if(track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
|
|
trust_default_duration = 0;
|
|
}
|
|
}
|
|
|
|
if (!block_duration && trust_default_duration)
|
|
block_duration = track->default_duration * laces / matroska->time_scale;
|
|
|
|
if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
|
|
track->end_timecode =
|
|
FFMAX(track->end_timecode, timecode + block_duration);
|
|
|
|
for (n = 0; n < laces; n++) {
|
|
int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
|
|
|
|
if (lace_size[n] > size) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
|
|
break;
|
|
}
|
|
|
|
if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
|
|
st->codec->codec_id == AV_CODEC_ID_COOK ||
|
|
st->codec->codec_id == AV_CODEC_ID_SIPR ||
|
|
st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
|
|
st->codec->block_align && track->audio.sub_packet_size) {
|
|
|
|
res = matroska_parse_rm_audio(matroska, track, st, data,
|
|
lace_size[n],
|
|
timecode, pos);
|
|
if (res)
|
|
goto end;
|
|
|
|
} else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
|
|
res = matroska_parse_webvtt(matroska, track, st,
|
|
data, lace_size[n],
|
|
timecode, lace_duration,
|
|
pos);
|
|
if (res)
|
|
goto end;
|
|
|
|
} else {
|
|
res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
|
|
timecode, lace_duration,
|
|
pos, !n? is_keyframe : 0,
|
|
additional, additional_id, additional_size,
|
|
discard_padding);
|
|
if (res)
|
|
goto end;
|
|
}
|
|
|
|
if (timecode != AV_NOPTS_VALUE)
|
|
timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
|
|
data += lace_size[n];
|
|
size -= lace_size[n];
|
|
}
|
|
|
|
end:
|
|
av_free(lace_size);
|
|
return res;
|
|
}
|
|
|
|
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
|
|
{
|
|
EbmlList *blocks_list;
|
|
MatroskaBlock *blocks;
|
|
int i, res;
|
|
res = ebml_parse(matroska,
|
|
matroska_cluster_incremental_parsing,
|
|
&matroska->current_cluster);
|
|
if (res == 1) {
|
|
/* New Cluster */
|
|
if (matroska->current_cluster_pos)
|
|
ebml_level_end(matroska);
|
|
ebml_free(matroska_cluster, &matroska->current_cluster);
|
|
memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
|
|
matroska->current_cluster_num_blocks = 0;
|
|
matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
|
|
matroska->prev_pkt = NULL;
|
|
/* sizeof the ID which was already read */
|
|
if (matroska->current_id)
|
|
matroska->current_cluster_pos -= 4;
|
|
res = ebml_parse(matroska,
|
|
matroska_clusters_incremental,
|
|
&matroska->current_cluster);
|
|
/* Try parsing the block again. */
|
|
if (res == 1)
|
|
res = ebml_parse(matroska,
|
|
matroska_cluster_incremental_parsing,
|
|
&matroska->current_cluster);
|
|
}
|
|
|
|
if (!res &&
|
|
matroska->current_cluster_num_blocks <
|
|
matroska->current_cluster.blocks.nb_elem) {
|
|
blocks_list = &matroska->current_cluster.blocks;
|
|
blocks = blocks_list->elem;
|
|
|
|
matroska->current_cluster_num_blocks = blocks_list->nb_elem;
|
|
i = blocks_list->nb_elem - 1;
|
|
if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
|
|
int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
|
|
uint8_t* additional = blocks[i].additional.size > 0 ?
|
|
blocks[i].additional.data : NULL;
|
|
if (!blocks[i].non_simple)
|
|
blocks[i].duration = 0;
|
|
res = matroska_parse_block(matroska,
|
|
blocks[i].bin.data, blocks[i].bin.size,
|
|
blocks[i].bin.pos,
|
|
matroska->current_cluster.timecode,
|
|
blocks[i].duration, is_keyframe,
|
|
additional, blocks[i].additional_id,
|
|
blocks[i].additional.size,
|
|
matroska->current_cluster_pos,
|
|
blocks[i].discard_padding);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
|
|
{
|
|
MatroskaCluster cluster = { 0 };
|
|
EbmlList *blocks_list;
|
|
MatroskaBlock *blocks;
|
|
int i, res;
|
|
int64_t pos;
|
|
if (!matroska->contains_ssa)
|
|
return matroska_parse_cluster_incremental(matroska);
|
|
pos = avio_tell(matroska->ctx->pb);
|
|
matroska->prev_pkt = NULL;
|
|
if (matroska->current_id)
|
|
pos -= 4; /* sizeof the ID which was already read */
|
|
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 && blocks[i].bin.data) {
|
|
int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
|
|
res=matroska_parse_block(matroska,
|
|
blocks[i].bin.data, blocks[i].bin.size,
|
|
blocks[i].bin.pos, cluster.timecode,
|
|
blocks[i].duration, is_keyframe, NULL, 0, 0,
|
|
pos, blocks[i].discard_padding);
|
|
}
|
|
ebml_free(matroska_cluster, &cluster);
|
|
return res;
|
|
}
|
|
|
|
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
|
|
while (matroska_deliver_packet(matroska, pkt)) {
|
|
int64_t pos = avio_tell(matroska->ctx->pb);
|
|
if (matroska->done)
|
|
return AVERROR_EOF;
|
|
if (matroska_parse_cluster(matroska) < 0)
|
|
matroska_resync(matroska, pos);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int matroska_read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
MatroskaTrack *tracks = matroska->tracks.elem;
|
|
AVStream *st = s->streams[stream_index];
|
|
int i, index, index_sub, index_min;
|
|
|
|
/* Parse the CUES now since we need the index data to seek. */
|
|
if (matroska->cues_parsing_deferred > 0) {
|
|
matroska->cues_parsing_deferred = 0;
|
|
matroska_parse_cues(matroska);
|
|
}
|
|
|
|
if (!st->nb_index_entries)
|
|
goto err;
|
|
timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
|
|
|
|
if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
|
|
avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
|
|
matroska->current_id = 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 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
|
|
goto err;
|
|
|
|
index_min = index;
|
|
for (i=0; i < matroska->tracks.nb_elem; i++) {
|
|
tracks[i].audio.pkt_cnt = 0;
|
|
tracks[i].audio.sub_packet_cnt = 0;
|
|
tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
|
|
tracks[i].end_timecode = 0;
|
|
if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
|
|
&& tracks[i].stream->discard != AVDISCARD_ALL) {
|
|
index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
|
|
while(index_sub >= 0
|
|
&& index_min >= 0
|
|
&& tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos
|
|
&& st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
|
|
index_min--;
|
|
}
|
|
}
|
|
|
|
avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
|
|
matroska->current_id = 0;
|
|
if (flags & AVSEEK_FLAG_ANY) {
|
|
st->skip_to_keyframe = 0;
|
|
matroska->skip_to_timecode = timestamp;
|
|
} else {
|
|
st->skip_to_keyframe = 1;
|
|
matroska->skip_to_timecode = st->index_entries[index].timestamp;
|
|
}
|
|
matroska->skip_to_keyframe = 1;
|
|
matroska->done = 0;
|
|
matroska->num_levels = 0;
|
|
ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
|
|
return 0;
|
|
err:
|
|
// slightly hackish but allows proper fallback to
|
|
// the generic seeking code.
|
|
matroska_clear_queue(matroska);
|
|
matroska->current_id = 0;
|
|
st->skip_to_keyframe =
|
|
matroska->skip_to_keyframe = 0;
|
|
matroska->done = 0;
|
|
matroska->num_levels = 0;
|
|
return -1;
|
|
}
|
|
|
|
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_cluster, &matroska->current_cluster);
|
|
ebml_free(matroska_segment, matroska);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_matroska_demuxer = {
|
|
.name = "matroska,webm",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
|
|
.priv_data_size = sizeof(MatroskaDemuxContext),
|
|
.read_probe = matroska_probe,
|
|
.read_header = matroska_read_header,
|
|
.read_packet = matroska_read_packet,
|
|
.read_close = matroska_read_close,
|
|
.read_seek = matroska_read_seek,
|
|
};
|