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/*
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 * Matroska file demuxer
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 * Copyright (c) 2003-2008 The FFmpeg Project
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file matroskadec.c
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 * Matroska file demuxer
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 * by Ronald Bultje <rbultje@ronald.bitfreak.net>
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 * with a little help from Moritz Bunkus <moritz@bunkus.org>
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 * totally reworked by Aurelien Jacobs <aurel@gnuage.org>
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 * Specs available on the Matroska project page: http://www.matroska.org/.
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 */
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#include "avformat.h"
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/* For codec_get_id(). */
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#include "riff.h"
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#include "isom.h"
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#include "matroska.h"
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#include "libavcodec/mpeg4audio.h"
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#include "libavutil/intfloat_readwrite.h"
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#include "libavutil/avstring.h"
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#include "libavutil/lzo.h"
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#ifdef CONFIG_ZLIB
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#include <zlib.h>
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#endif
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#ifdef CONFIG_BZLIB
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#include <bzlib.h>
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#endif
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typedef enum {
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    EBML_NONE,
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    EBML_UINT,
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    EBML_FLOAT,
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    EBML_STR,
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    EBML_UTF8,
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    EBML_BIN,
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    EBML_NEST,
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    EBML_PASS,
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    EBML_STOP,
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} EbmlType;
58

    
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typedef const struct EbmlSyntax {
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    uint32_t id;
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    EbmlType type;
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    int list_elem_size;
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    int data_offset;
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    union {
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        uint64_t    u;
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        double      f;
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        const char *s;
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        const struct EbmlSyntax *n;
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    } def;
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} EbmlSyntax;
71

    
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typedef struct {
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    int nb_elem;
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    void *elem;
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} EbmlList;
76

    
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typedef struct {
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    int      size;
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    uint8_t *data;
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    int64_t  pos;
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} EbmlBin;
82

    
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typedef struct {
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    uint64_t version;
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    uint64_t max_size;
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    uint64_t id_length;
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    char    *doctype;
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    uint64_t doctype_version;
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} Ebml;
90

    
91
typedef struct {
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    uint64_t algo;
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    EbmlBin  settings;
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} MatroskaTrackCompression;
95

    
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typedef struct {
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    uint64_t scope;
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    uint64_t type;
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    MatroskaTrackCompression compression;
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} MatroskaTrackEncoding;
101

    
102
typedef struct {
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    double   frame_rate;
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    uint64_t display_width;
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    uint64_t display_height;
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    uint64_t pixel_width;
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    uint64_t pixel_height;
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    uint64_t fourcc;
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} MatroskaTrackVideo;
110

    
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typedef struct {
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    double   samplerate;
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    double   out_samplerate;
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    uint64_t bitdepth;
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    uint64_t channels;
116

    
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    /* real audio header (extracted from extradata) */
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    int      coded_framesize;
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    int      sub_packet_h;
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    int      frame_size;
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    int      sub_packet_size;
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    int      sub_packet_cnt;
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    int      pkt_cnt;
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    uint8_t *buf;
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} MatroskaTrackAudio;
126

    
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typedef struct {
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    uint64_t num;
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    uint64_t type;
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    char    *codec_id;
131
    EbmlBin  codec_priv;
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    char    *language;
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    double time_scale;
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    uint64_t default_duration;
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    uint64_t flag_default;
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    MatroskaTrackVideo video;
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    MatroskaTrackAudio audio;
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    EbmlList encodings;
139

    
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    AVStream *stream;
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} MatroskaTrack;
142

    
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typedef struct {
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    char *filename;
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    char *mime;
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    EbmlBin bin;
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} MatroskaAttachement;
148

    
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typedef struct {
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    uint64_t start;
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    uint64_t end;
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    uint64_t uid;
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    char    *title;
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} MatroskaChapter;
155

    
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typedef struct {
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    uint64_t track;
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    uint64_t pos;
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} MatroskaIndexPos;
160

    
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typedef struct {
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    uint64_t time;
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    EbmlList pos;
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} MatroskaIndex;
165

    
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typedef struct {
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    uint64_t id;
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    uint64_t pos;
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} MatroskaSeekhead;
170

    
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typedef struct {
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    uint64_t start;
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    uint64_t length;
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} MatroskaLevel;
175

    
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typedef struct {
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    AVFormatContext *ctx;
178

    
179
    /* EBML stuff */
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    int num_levels;
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    MatroskaLevel levels[EBML_MAX_DEPTH];
182
    int level_up;
183

    
184
    uint64_t time_scale;
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    double   duration;
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    char    *title;
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    EbmlList tracks;
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    EbmlList attachments;
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    EbmlList chapters;
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    EbmlList index;
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    EbmlList seekhead;
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    /* byte position of the segment inside the stream */
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    offset_t segment_start;
195

    
196
    /* the packet queue */
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    AVPacket **packets;
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    int num_packets;
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200
    int done;
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    int has_cluster_id;
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203
    /* What to skip before effectively reading a packet. */
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    int skip_to_keyframe;
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    AVStream *skip_to_stream;
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} MatroskaDemuxContext;
207

    
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typedef struct {
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    uint64_t duration;
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    int64_t  reference;
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    EbmlBin  bin;
212
} MatroskaBlock;
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214
typedef struct {
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    uint64_t timecode;
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    EbmlList blocks;
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} MatroskaCluster;
218

    
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#define ARRAY_SIZE(x)  (sizeof(x)/sizeof(*x))
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static EbmlSyntax ebml_header[] = {
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    { EBML_ID_EBMLREADVERSION,        EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
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    { EBML_ID_EBMLMAXSIZELENGTH,      EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
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    { EBML_ID_EBMLMAXIDLENGTH,        EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
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    { EBML_ID_DOCTYPE,                EBML_STR,  0, offsetof(Ebml,doctype), {.s="(none)"} },
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    { EBML_ID_DOCTYPEREADVERSION,     EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
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    { EBML_ID_EBMLVERSION,            EBML_NONE },
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    { EBML_ID_DOCTYPEVERSION,         EBML_NONE },
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    { EBML_ID_VOID,                   EBML_NONE },
230
    { 0 }
231
};
232

    
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static EbmlSyntax ebml_syntax[] = {
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    { EBML_ID_HEADER,                 EBML_NEST, 0, 0, {.n=ebml_header} },
235
    { 0 }
236
};
237

    
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static EbmlSyntax matroska_info[] = {
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    { MATROSKA_ID_TIMECODESCALE,      EBML_UINT,  0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
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    { MATROSKA_ID_DURATION,           EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
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    { MATROSKA_ID_TITLE,              EBML_UTF8,  0, offsetof(MatroskaDemuxContext,title) },
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    { MATROSKA_ID_WRITINGAPP,         EBML_NONE },
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    { MATROSKA_ID_MUXINGAPP,          EBML_NONE },
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    { MATROSKA_ID_DATEUTC,            EBML_NONE },
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    { MATROSKA_ID_SEGMENTUID,         EBML_NONE },
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    { EBML_ID_VOID,                   EBML_NONE },
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    { 0 }
248
};
249

    
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static EbmlSyntax matroska_track_video[] = {
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    { MATROSKA_ID_VIDEOFRAMERATE,     EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
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    { MATROSKA_ID_VIDEODISPLAYWIDTH,  EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
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    { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
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    { MATROSKA_ID_VIDEOPIXELWIDTH,    EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
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    { MATROSKA_ID_VIDEOPIXELHEIGHT,   EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
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    { MATROSKA_ID_VIDEOCOLORSPACE,    EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
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    { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
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    { MATROSKA_ID_VIDEOSTEREOMODE,    EBML_NONE },
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    { MATROSKA_ID_VIDEOASPECTRATIO,   EBML_NONE },
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    { EBML_ID_VOID,                   EBML_NONE },
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    { 0 }
262
};
263

    
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static EbmlSyntax matroska_track_audio[] = {
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    { MATROSKA_ID_AUDIOSAMPLINGFREQ,  EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
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    { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
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    { MATROSKA_ID_AUDIOBITDEPTH,      EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
268
    { MATROSKA_ID_AUDIOCHANNELS,      EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
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    { EBML_ID_VOID,                   EBML_NONE },
270
    { 0 }
271
};
272

    
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static EbmlSyntax matroska_track_encoding_compression[] = {
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    { MATROSKA_ID_ENCODINGCOMPALGO,   EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
275
    { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
276
    { EBML_ID_VOID,                   EBML_NONE },
277
    { 0 }
278
};
279

    
280
static EbmlSyntax matroska_track_encoding[] = {
281
    { MATROSKA_ID_ENCODINGSCOPE,      EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
282
    { MATROSKA_ID_ENCODINGTYPE,       EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
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    { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
284
    { EBML_ID_VOID,                   EBML_NONE },
285
    { 0 }
286
};
287

    
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static EbmlSyntax matroska_track_encodings[] = {
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    { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
290
    { EBML_ID_VOID,                   EBML_NONE },
291
    { 0 }
292
};
293

    
294
static EbmlSyntax matroska_track[] = {
295
    { MATROSKA_ID_TRACKNUMBER,          EBML_UINT, 0, offsetof(MatroskaTrack,num) },
296
    { MATROSKA_ID_TRACKTYPE,            EBML_UINT, 0, offsetof(MatroskaTrack,type) },
297
    { MATROSKA_ID_CODECID,              EBML_STR,  0, offsetof(MatroskaTrack,codec_id) },
298
    { MATROSKA_ID_CODECPRIVATE,         EBML_BIN,  0, offsetof(MatroskaTrack,codec_priv) },
299
    { MATROSKA_ID_TRACKLANGUAGE,        EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
300
    { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
301
    { MATROSKA_ID_TRACKTIMECODESCALE,   EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
302
    { MATROSKA_ID_TRACKFLAGDEFAULT,     EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
303
    { MATROSKA_ID_TRACKVIDEO,           EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
304
    { MATROSKA_ID_TRACKAUDIO,           EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
305
    { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
306
    { MATROSKA_ID_TRACKUID,             EBML_NONE },
307
    { MATROSKA_ID_TRACKNAME,            EBML_NONE },
308
    { MATROSKA_ID_TRACKFLAGENABLED,     EBML_NONE },
309
    { MATROSKA_ID_TRACKFLAGFORCED,      EBML_NONE },
310
    { MATROSKA_ID_TRACKFLAGLACING,      EBML_NONE },
311
    { MATROSKA_ID_CODECNAME,            EBML_NONE },
312
    { MATROSKA_ID_CODECDECODEALL,       EBML_NONE },
313
    { MATROSKA_ID_CODECINFOURL,         EBML_NONE },
314
    { MATROSKA_ID_CODECDOWNLOADURL,     EBML_NONE },
315
    { MATROSKA_ID_TRACKMINCACHE,        EBML_NONE },
316
    { MATROSKA_ID_TRACKMAXCACHE,        EBML_NONE },
317
    { EBML_ID_VOID,                     EBML_NONE },
318
    { 0 }
319
};
320

    
321
static EbmlSyntax matroska_tracks[] = {
322
    { MATROSKA_ID_TRACKENTRY,         EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
323
    { EBML_ID_VOID,                   EBML_NONE },
324
    { 0 }
325
};
326

    
327
static EbmlSyntax matroska_attachment[] = {
328
    { MATROSKA_ID_FILENAME,           EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
329
    { MATROSKA_ID_FILEMIMETYPE,       EBML_STR,  0, offsetof(MatroskaAttachement,mime) },
330
    { MATROSKA_ID_FILEDATA,           EBML_BIN,  0, offsetof(MatroskaAttachement,bin) },
331
    { MATROSKA_ID_FILEUID,            EBML_NONE },
332
    { EBML_ID_VOID,                   EBML_NONE },
333
    { 0 }
334
};
335

    
336
static EbmlSyntax matroska_attachments[] = {
337
    { MATROSKA_ID_ATTACHEDFILE,       EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
338
    { EBML_ID_VOID,                   EBML_NONE },
339
    { 0 }
340
};
341

    
342
static EbmlSyntax matroska_chapter_display[] = {
343
    { MATROSKA_ID_CHAPSTRING,         EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
344
    { EBML_ID_VOID,                   EBML_NONE },
345
    { 0 }
346
};
347

    
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static EbmlSyntax matroska_chapter_entry[] = {
349
    { MATROSKA_ID_CHAPTERTIMESTART,   EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
350
    { MATROSKA_ID_CHAPTERTIMEEND,     EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
351
    { MATROSKA_ID_CHAPTERUID,         EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
352
    { MATROSKA_ID_CHAPTERDISPLAY,     EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
353
    { MATROSKA_ID_CHAPTERFLAGHIDDEN,  EBML_NONE },
354
    { EBML_ID_VOID,                   EBML_NONE },
355
    { 0 }
356
};
357

    
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static EbmlSyntax matroska_chapter[] = {
359
    { MATROSKA_ID_CHAPTERATOM,        EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
360
    { MATROSKA_ID_EDITIONUID,         EBML_NONE },
361
    { MATROSKA_ID_EDITIONFLAGHIDDEN,  EBML_NONE },
362
    { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
363
    { EBML_ID_VOID,                   EBML_NONE },
364
    { 0 }
365
};
366

    
367
static EbmlSyntax matroska_chapters[] = {
368
    { MATROSKA_ID_EDITIONENTRY,       EBML_NEST, 0, 0, {.n=matroska_chapter} },
369
    { EBML_ID_VOID,                   EBML_NONE },
370
    { 0 }
371
};
372

    
373
static EbmlSyntax matroska_index_pos[] = {
374
    { MATROSKA_ID_CUETRACK,           EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
375
    { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos)   },
376
    { EBML_ID_VOID,                   EBML_NONE },
377
    { 0 }
378
};
379

    
380
static EbmlSyntax matroska_index_entry[] = {
381
    { MATROSKA_ID_CUETIME,            EBML_UINT, 0, offsetof(MatroskaIndex,time) },
382
    { MATROSKA_ID_CUETRACKPOSITION,   EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
383
    { EBML_ID_VOID,                   EBML_NONE },
384
    { 0 }
385
};
386

    
387
static EbmlSyntax matroska_index[] = {
388
    { MATROSKA_ID_POINTENTRY,         EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
389
    { EBML_ID_VOID,                   EBML_NONE },
390
    { 0 }
391
};
392

    
393
static EbmlSyntax matroska_tags[] = {
394
    { EBML_ID_VOID,                   EBML_NONE },
395
    { 0 }
396
};
397

    
398
static EbmlSyntax matroska_seekhead_entry[] = {
399
    { MATROSKA_ID_SEEKID,             EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
400
    { MATROSKA_ID_SEEKPOSITION,       EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
401
    { EBML_ID_VOID,                   EBML_NONE },
402
    { 0 }
403
};
404

    
405
static EbmlSyntax matroska_seekhead[] = {
406
    { MATROSKA_ID_SEEKENTRY,          EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
407
    { EBML_ID_VOID,                   EBML_NONE },
408
    { 0 }
409
};
410

    
411
static EbmlSyntax matroska_segment[] = {
412
    { MATROSKA_ID_INFO,           EBML_NEST, 0, 0, {.n=matroska_info       } },
413
    { MATROSKA_ID_TRACKS,         EBML_NEST, 0, 0, {.n=matroska_tracks     } },
414
    { MATROSKA_ID_ATTACHMENTS,    EBML_NEST, 0, 0, {.n=matroska_attachments} },
415
    { MATROSKA_ID_CHAPTERS,       EBML_NEST, 0, 0, {.n=matroska_chapters   } },
416
    { MATROSKA_ID_CUES,           EBML_NEST, 0, 0, {.n=matroska_index      } },
417
    { MATROSKA_ID_TAGS,           EBML_NEST, 0, 0, {.n=matroska_tags       } },
418
    { MATROSKA_ID_SEEKHEAD,       EBML_NEST, 0, 0, {.n=matroska_seekhead   } },
419
    { MATROSKA_ID_CLUSTER,        EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) },
420
    { EBML_ID_VOID,               EBML_NONE },
421
    { 0 }
422
};
423

    
424
static EbmlSyntax matroska_segments[] = {
425
    { MATROSKA_ID_SEGMENT,        EBML_NEST, 0, 0, {.n=matroska_segment    } },
426
    { 0 }
427
};
428

    
429
static EbmlSyntax matroska_blockgroup[] = {
430
    { MATROSKA_ID_BLOCK,          EBML_BIN,  0, offsetof(MatroskaBlock,bin) },
431
    { MATROSKA_ID_SIMPLEBLOCK,    EBML_BIN,  0, offsetof(MatroskaBlock,bin) },
432
    { MATROSKA_ID_BLOCKDURATION,  EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
433
    { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
434
    { EBML_ID_VOID,               EBML_NONE },
435
    { 0 }
436
};
437

    
438
static EbmlSyntax matroska_cluster[] = {
439
    { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
440
    { MATROSKA_ID_BLOCKGROUP,     EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
441
    { MATROSKA_ID_SIMPLEBLOCK,    EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
442
    { EBML_ID_VOID,               EBML_NONE },
443
    { 0 }
444
};
445

    
446
static EbmlSyntax matroska_clusters[] = {
447
    { MATROSKA_ID_CLUSTER,        EBML_NEST, 0, 0, {.n=matroska_cluster} },
448
    { 0 }
449
};
450

    
451
/*
452
 * Return: Whether we reached the end of a level in the hierarchy or not.
453
 */
454
static int ebml_level_end(MatroskaDemuxContext *matroska)
455
{
456
    ByteIOContext *pb = matroska->ctx->pb;
457
    offset_t pos = url_ftell(pb);
458

    
459
    if (matroska->num_levels > 0) {
460
        MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
461
        if (pos - level->start >= level->length) {
462
            matroska->num_levels--;
463
            return 1;
464
        }
465
    }
466
    return 0;
467
}
468

    
469
/*
470
 * Read: an "EBML number", which is defined as a variable-length
471
 * array of bytes. The first byte indicates the length by giving a
472
 * number of 0-bits followed by a one. The position of the first
473
 * "one" bit inside the first byte indicates the length of this
474
 * number.
475
 * Returns: number of bytes read, < 0 on error
476
 */
477
static int ebml_read_num(MatroskaDemuxContext *matroska, ByteIOContext *pb,
478
                         int max_size, uint64_t *number)
479
{
480
    int len_mask = 0x80, read = 1, n = 1;
481
    int64_t total = 0;
482

    
483
    /* The first byte tells us the length in bytes - get_byte() can normally
484
     * return 0, but since that's not a valid first ebmlID byte, we can
485
     * use it safely here to catch EOS. */
486
    if (!(total = get_byte(pb))) {
487
        /* we might encounter EOS here */
488
        if (!url_feof(pb)) {
489
            offset_t pos = url_ftell(pb);
490
            av_log(matroska->ctx, AV_LOG_ERROR,
491
                   "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
492
                   pos, pos);
493
        }
494
        return AVERROR(EIO); /* EOS or actual I/O error */
495
    }
496

    
497
    /* get the length of the EBML number */
498
    while (read <= max_size && !(total & len_mask)) {
499
        read++;
500
        len_mask >>= 1;
501
    }
502
    if (read > max_size) {
503
        offset_t pos = url_ftell(pb) - 1;
504
        av_log(matroska->ctx, AV_LOG_ERROR,
505
               "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
506
               (uint8_t) total, pos, pos);
507
        return AVERROR_INVALIDDATA;
508
    }
509

    
510
    /* read out length */
511
    total &= ~len_mask;
512
    while (n++ < read)
513
        total = (total << 8) | get_byte(pb);
514

    
515
    *number = total;
516

    
517
    return read;
518
}
519

    
520
/*
521
 * Read the next element as an unsigned int.
522
 * 0 is success, < 0 is failure.
523
 */
524
static int ebml_read_uint(ByteIOContext *pb, int size, uint64_t *num)
525
{
526
    int n = 0;
527

    
528
    if (size < 1 || size > 8)
529
        return AVERROR_INVALIDDATA;
530

    
531
    /* big-endian ordering; build up number */
532
    *num = 0;
533
    while (n++ < size)
534
        *num = (*num << 8) | get_byte(pb);
535

    
536
    return 0;
537
}
538

    
539
/*
540
 * Read the next element as a float.
541
 * 0 is success, < 0 is failure.
542
 */
543
static int ebml_read_float(ByteIOContext *pb, int size, double *num)
544
{
545
    if (size == 4) {
546
        *num= av_int2flt(get_be32(pb));
547
    } else if(size==8){
548
        *num= av_int2dbl(get_be64(pb));
549
    } else
550
        return AVERROR_INVALIDDATA;
551

    
552
    return 0;
553
}
554

    
555
/*
556
 * Read the next element as an ASCII string.
557
 * 0 is success, < 0 is failure.
558
 */
559
static int ebml_read_ascii(ByteIOContext *pb, int size, char **str)
560
{
561
    av_free(*str);
562
    /* EBML strings are usually not 0-terminated, so we allocate one
563
     * byte more, read the string and NULL-terminate it ourselves. */
564
    if (!(*str = av_malloc(size + 1)))
565
        return AVERROR(ENOMEM);
566
    if (get_buffer(pb, (uint8_t *) *str, size) != size) {
567
        av_free(*str);
568
        return AVERROR(EIO);
569
    }
570
    (*str)[size] = '\0';
571

    
572
    return 0;
573
}
574

    
575
/*
576
 * Read the next element as binary data.
577
 * 0 is success, < 0 is failure.
578
 */
579
static int ebml_read_binary(ByteIOContext *pb, int length, EbmlBin *bin)
580
{
581
    av_free(bin->data);
582
    if (!(bin->data = av_malloc(length)))
583
        return AVERROR(ENOMEM);
584

    
585
    bin->size = length;
586
    bin->pos  = url_ftell(pb);
587
    if (get_buffer(pb, bin->data, length) != length)
588
        return AVERROR(EIO);
589

    
590
    return 0;
591
}
592

    
593
/*
594
 * Read the next element, but only the header. The contents
595
 * are supposed to be sub-elements which can be read separately.
596
 * 0 is success, < 0 is failure.
597
 */
598
static int ebml_read_master(MatroskaDemuxContext *matroska, int length)
599
{
600
    ByteIOContext *pb = matroska->ctx->pb;
601
    MatroskaLevel *level;
602

    
603
    if (matroska->num_levels >= EBML_MAX_DEPTH) {
604
        av_log(matroska->ctx, AV_LOG_ERROR,
605
               "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
606
        return AVERROR(ENOSYS);
607
    }
608

    
609
    level = &matroska->levels[matroska->num_levels++];
610
    level->start = url_ftell(pb);
611
    level->length = length;
612

    
613
    return 0;
614
}
615

    
616
/*
617
 * Read signed/unsigned "EBML" numbers.
618
 * Return: number of bytes processed, < 0 on error
619
 */
620
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
621
                                 uint8_t *data, uint32_t size, uint64_t *num)
622
{
623
    ByteIOContext pb;
624
    init_put_byte(&pb, data, size, 0, NULL, NULL, NULL, NULL);
625
    return ebml_read_num(matroska, &pb, 8, num);
626
}
627

    
628
/*
629
 * Same as above, but signed.
630
 */
631
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
632
                                 uint8_t *data, uint32_t size, int64_t *num)
633
{
634
    uint64_t unum;
635
    int res;
636

    
637
    /* read as unsigned number first */
638
    if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
639
        return res;
640

    
641
    /* make signed (weird way) */
642
    *num = unum - ((1LL << (7*res - 1)) - 1);
643

    
644
    return res;
645
}
646

    
647
static int ebml_parse_elem(MatroskaDemuxContext *matroska,
648
                           EbmlSyntax *syntax, void *data);
649

    
650
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
651
                         uint32_t id, void *data)
652
{
653
    int i;
654
    for (i=0; syntax[i].id; i++)
655
        if (id == syntax[i].id)
656
            break;
657
    if (!syntax[i].id)
658
        av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
659
    return ebml_parse_elem(matroska, &syntax[i], data);
660
}
661

    
662
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
663
                      void *data)
664
{
665
    uint64_t id;
666
    int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
667
    id |= 1 << 7*res;
668
    return res < 0 ? res : ebml_parse_id(matroska, syntax, id, data);
669
}
670

    
671
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
672
                           void *data)
673
{
674
    int i, res = 0;
675

    
676
    for (i=0; syntax[i].id; i++)
677
        switch (syntax[i].type) {
678
        case EBML_UINT:
679
            *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
680
            break;
681
        case EBML_FLOAT:
682
            *(double   *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
683
            break;
684
        case EBML_STR:
685
        case EBML_UTF8:
686
            *(char    **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
687
            break;
688
        }
689

    
690
    while (!res && !ebml_level_end(matroska))
691
        res = ebml_parse(matroska, syntax, data);
692

    
693
    return res;
694
}
695

    
696
static int ebml_parse_elem(MatroskaDemuxContext *matroska,
697
                           EbmlSyntax *syntax, void *data)
698
{
699
    ByteIOContext *pb = matroska->ctx->pb;
700
    uint32_t id = syntax->id;
701
    uint64_t length;
702
    int res;
703

    
704
    data = (char *)data + syntax->data_offset;
705
    if (syntax->list_elem_size) {
706
        EbmlList *list = data;
707
        list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
708
        data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
709
        memset(data, 0, syntax->list_elem_size);
710
        list->nb_elem++;
711
    }
712

    
713
    if (syntax->type != EBML_PASS && syntax->type != EBML_STOP)
714
        if ((res = ebml_read_num(matroska, pb, 8, &length)) < 0)
715
            return res;
716

    
717
    switch (syntax->type) {
718
    case EBML_UINT:  res = ebml_read_uint  (pb, length, data);  break;
719
    case EBML_FLOAT: res = ebml_read_float (pb, length, data);  break;
720
    case EBML_STR:
721
    case EBML_UTF8:  res = ebml_read_ascii (pb, length, data);  break;
722
    case EBML_BIN:   res = ebml_read_binary(pb, length, data);  break;
723
    case EBML_NEST:  if ((res=ebml_read_master(matroska, length)) < 0)
724
                         return res;
725
                     if (id == MATROSKA_ID_SEGMENT)
726
                         matroska->segment_start = url_ftell(matroska->ctx->pb);
727
                     return ebml_parse_nest(matroska, syntax->def.n, data);
728
    case EBML_PASS:  return ebml_parse_id(matroska, syntax->def.n, id, data);
729
    case EBML_STOP:  *(int *)data = 1;      return 1;
730
    default:         url_fskip(pb, length); return 0;
731
    }
732
    if (res == AVERROR_INVALIDDATA)
733
        av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
734
    else if (res == AVERROR(EIO))
735
        av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
736
    return res;
737
}
738

    
739
static void ebml_free(EbmlSyntax *syntax, void *data)
740
{
741
    int i, j;
742
    for (i=0; syntax[i].id; i++) {
743
        void *data_off = (char *)data + syntax[i].data_offset;
744
        switch (syntax[i].type) {
745
        case EBML_STR:
746
        case EBML_UTF8:  av_freep(data_off);                      break;
747
        case EBML_BIN:   av_freep(&((EbmlBin *)data_off)->data);  break;
748
        case EBML_NEST:
749
            if (syntax[i].list_elem_size) {
750
                EbmlList *list = data_off;
751
                char *ptr = list->elem;
752
                for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
753
                    ebml_free(syntax[i].def.n, ptr);
754
                av_free(list->elem);
755
            } else
756
                ebml_free(syntax[i].def.n, data_off);
757
        default:  break;
758
        }
759
    }
760
}
761

    
762

    
763
/*
764
 * Autodetecting...
765
 */
766
static int matroska_probe(AVProbeData *p)
767
{
768
    uint64_t total = 0;
769
    int len_mask = 0x80, size = 1, n = 1;
770
    char probe_data[] = "matroska";
771

    
772
    /* EBML header? */
773
    if (AV_RB32(p->buf) != EBML_ID_HEADER)
774
        return 0;
775

    
776
    /* length of header */
777
    total = p->buf[4];
778
    while (size <= 8 && !(total & len_mask)) {
779
        size++;
780
        len_mask >>= 1;
781
    }
782
    if (size > 8)
783
      return 0;
784
    total &= (len_mask - 1);
785
    while (n < size)
786
        total = (total << 8) | p->buf[4 + n++];
787

    
788
    /* Does the probe data contain the whole header? */
789
    if (p->buf_size < 4 + size + total)
790
      return 0;
791

    
792
    /* The header must contain the document type 'matroska'. For now,
793
     * we don't parse the whole header but simply check for the
794
     * availability of that array of characters inside the header.
795
     * Not fully fool-proof, but good enough. */
796
    for (n = 4+size; n <= 4+size+total-(sizeof(probe_data)-1); n++)
797
        if (!memcmp(p->buf+n, probe_data, sizeof(probe_data)-1))
798
            return AVPROBE_SCORE_MAX;
799

    
800
    return 0;
801
}
802

    
803
static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
804
                                                 int num)
805
{
806
    MatroskaTrack *tracks = matroska->tracks.elem;
807
    int i;
808

    
809
    for (i=0; i < matroska->tracks.nb_elem; i++)
810
        if (tracks[i].num == num)
811
            return &tracks[i];
812

    
813
    av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
814
    return NULL;
815
}
816

    
817
static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
818
                                  MatroskaTrack *track)
819
{
820
    MatroskaTrackEncoding *encodings = track->encodings.elem;
821
    uint8_t* data = *buf;
822
    int isize = *buf_size;
823
    uint8_t* pkt_data = NULL;
824
    int pkt_size = isize;
825
    int result = 0;
826
    int olen;
827

    
828
    switch (encodings[0].compression.algo) {
829
    case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
830
        return encodings[0].compression.settings.size;
831
    case MATROSKA_TRACK_ENCODING_COMP_LZO:
832
        do {
833
            olen = pkt_size *= 3;
834
            pkt_data = av_realloc(pkt_data,
835
                                  pkt_size+LZO_OUTPUT_PADDING);
836
            result = lzo1x_decode(pkt_data, &olen, data, &isize);
837
        } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
838
        if (result)
839
            goto failed;
840
        pkt_size -= olen;
841
        break;
842
#ifdef CONFIG_ZLIB
843
    case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
844
        z_stream zstream = {0};
845
        if (inflateInit(&zstream) != Z_OK)
846
            return -1;
847
        zstream.next_in = data;
848
        zstream.avail_in = isize;
849
        do {
850
            pkt_size *= 3;
851
            pkt_data = av_realloc(pkt_data, pkt_size);
852
            zstream.avail_out = pkt_size - zstream.total_out;
853
            zstream.next_out = pkt_data + zstream.total_out;
854
            result = inflate(&zstream, Z_NO_FLUSH);
855
        } while (result==Z_OK && pkt_size<10000000);
856
        pkt_size = zstream.total_out;
857
        inflateEnd(&zstream);
858
        if (result != Z_STREAM_END)
859
            goto failed;
860
        break;
861
    }
862
#endif
863
#ifdef CONFIG_BZLIB
864
    case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
865
        bz_stream bzstream = {0};
866
        if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
867
            return -1;
868
        bzstream.next_in = data;
869
        bzstream.avail_in = isize;
870
        do {
871
            pkt_size *= 3;
872
            pkt_data = av_realloc(pkt_data, pkt_size);
873
            bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
874
            bzstream.next_out = pkt_data + bzstream.total_out_lo32;
875
            result = BZ2_bzDecompress(&bzstream);
876
        } while (result==BZ_OK && pkt_size<10000000);
877
        pkt_size = bzstream.total_out_lo32;
878
        BZ2_bzDecompressEnd(&bzstream);
879
        if (result != BZ_STREAM_END)
880
            goto failed;
881
        break;
882
    }
883
#endif
884
    }
885

    
886
    *buf = pkt_data;
887
    *buf_size = pkt_size;
888
    return 0;
889
 failed:
890
    av_free(pkt_data);
891
    return -1;
892
}
893

    
894
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
895
{
896
    EbmlList *seekhead_list = &matroska->seekhead;
897
    MatroskaSeekhead *seekhead = seekhead_list->elem;
898
    uint32_t level_up = matroska->level_up;
899
    offset_t before_pos = url_ftell(matroska->ctx->pb);
900
    MatroskaLevel level;
901
    int i;
902

    
903
    for (i=0; i<seekhead_list->nb_elem; i++) {
904
        offset_t offset = seekhead[i].pos + matroska->segment_start;
905

    
906
        if (seekhead[i].pos <= before_pos
907
            || seekhead[i].id == MATROSKA_ID_SEEKHEAD
908
            || seekhead[i].id == MATROSKA_ID_CLUSTER)
909
            continue;
910

    
911
        /* seek */
912
        if (url_fseek(matroska->ctx->pb, offset, SEEK_SET) != offset)
913
            continue;
914

    
915
        /* We don't want to lose our seekhead level, so we add
916
         * a dummy. This is a crude hack. */
917
        if (matroska->num_levels == EBML_MAX_DEPTH) {
918
            av_log(matroska->ctx, AV_LOG_INFO,
919
                   "Max EBML element depth (%d) reached, "
920
                   "cannot parse further.\n", EBML_MAX_DEPTH);
921
            break;
922
        }
923

    
924
        level.start = 0;
925
        level.length = (uint64_t)-1;
926
        matroska->levels[matroska->num_levels] = level;
927
        matroska->num_levels++;
928

    
929
        ebml_parse(matroska, matroska_segment, matroska);
930

    
931
        /* remove dummy level */
932
        while (matroska->num_levels) {
933
            uint64_t length = matroska->levels[--matroska->num_levels].length;
934
            if (length == (uint64_t)-1)
935
                break;
936
        }
937
    }
938

    
939
    /* seek back */
940
    url_fseek(matroska->ctx->pb, before_pos, SEEK_SET);
941
    matroska->level_up = level_up;
942
}
943

    
944
static int matroska_aac_profile(char *codec_id)
945
{
946
    static const char *aac_profiles[] = { "MAIN", "LC", "SSR" };
947
    int profile;
948

    
949
    for (profile=0; profile<ARRAY_SIZE(aac_profiles); profile++)
950
        if (strstr(codec_id, aac_profiles[profile]))
951
            break;
952
    return profile + 1;
953
}
954

    
955
static int matroska_aac_sri(int samplerate)
956
{
957
    int sri;
958

    
959
    for (sri=0; sri<ARRAY_SIZE(ff_mpeg4audio_sample_rates); sri++)
960
        if (ff_mpeg4audio_sample_rates[sri] == samplerate)
961
            break;
962
    return sri;
963
}
964

    
965
static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
966
{
967
    MatroskaDemuxContext *matroska = s->priv_data;
968
    EbmlList *attachements_list = &matroska->attachments;
969
    MatroskaAttachement *attachements;
970
    EbmlList *chapters_list = &matroska->chapters;
971
    MatroskaChapter *chapters;
972
    MatroskaTrack *tracks;
973
    EbmlList *index_list;
974
    MatroskaIndex *index;
975
    Ebml ebml = { 0 };
976
    AVStream *st;
977
    int i, j;
978

    
979
    matroska->ctx = s;
980

    
981
    /* First read the EBML header. */
982
    if (ebml_parse(matroska, ebml_syntax, &ebml)
983
        || ebml.version > EBML_VERSION       || ebml.max_size > sizeof(uint64_t)
984
        || ebml.id_length > sizeof(uint32_t) || strcmp(ebml.doctype, "matroska")
985
        || ebml.doctype_version > 2) {
986
        av_log(matroska->ctx, AV_LOG_ERROR,
987
               "EBML header using unsupported features\n"
988
               "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
989
               ebml.version, ebml.doctype, ebml.doctype_version);
990
        return AVERROR_NOFMT;
991
    }
992
    ebml_free(ebml_syntax, &ebml);
993

    
994
    /* The next thing is a segment. */
995
    if (ebml_parse(matroska, matroska_segments, matroska) < 0)
996
        return -1;
997
    matroska_execute_seekhead(matroska);
998

    
999
    if (matroska->duration)
1000
        matroska->ctx->duration = matroska->duration * matroska->time_scale
1001
                                  * 1000 / AV_TIME_BASE;
1002
    if (matroska->title)
1003
        strncpy(matroska->ctx->title, matroska->title,
1004
                sizeof(matroska->ctx->title)-1);
1005

    
1006
    tracks = matroska->tracks.elem;
1007
    for (i=0; i < matroska->tracks.nb_elem; i++) {
1008
        MatroskaTrack *track = &tracks[i];
1009
        enum CodecID codec_id = CODEC_ID_NONE;
1010
        EbmlList *encodings_list = &tracks->encodings;
1011
        MatroskaTrackEncoding *encodings = encodings_list->elem;
1012
        uint8_t *extradata = NULL;
1013
        int extradata_size = 0;
1014
        int extradata_offset = 0;
1015

    
1016
        /* Apply some sanity checks. */
1017
        if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1018
            track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1019
            track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1020
            av_log(matroska->ctx, AV_LOG_INFO,
1021
                   "Unknown or unsupported track type %"PRIu64"\n",
1022
                   track->type);
1023
            continue;
1024
        }
1025
        if (track->codec_id == NULL)
1026
            continue;
1027

    
1028
        if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1029
            if (!track->default_duration)
1030
                track->default_duration = 1000000000/track->video.frame_rate;
1031
            if (!track->video.display_width)
1032
                track->video.display_width = track->video.pixel_width;
1033
            if (!track->video.display_height)
1034
                track->video.display_height = track->video.pixel_height;
1035
        } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1036
            if (!track->audio.out_samplerate)
1037
                track->audio.out_samplerate = track->audio.samplerate;
1038
        }
1039
        if (encodings_list->nb_elem > 1) {
1040
            av_log(matroska->ctx, AV_LOG_ERROR,
1041
                   "Multiple combined encodings no supported");
1042
        } else if (encodings_list->nb_elem == 1) {
1043
            if (encodings[0].type ||
1044
                (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1045
#ifdef CONFIG_ZLIB
1046
                 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1047
#endif
1048
#ifdef CONFIG_BZLIB
1049
                 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1050
#endif
1051
                 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1052
                encodings[0].scope = 0;
1053
                av_log(matroska->ctx, AV_LOG_ERROR,
1054
                       "Unsupported encoding type");
1055
            } else if (track->codec_priv.size && encodings[0].scope&2) {
1056
                uint8_t *codec_priv = track->codec_priv.data;
1057
                int offset = matroska_decode_buffer(&track->codec_priv.data,
1058
                                                    &track->codec_priv.size,
1059
                                                    track);
1060
                if (offset < 0) {
1061
                    track->codec_priv.data = NULL;
1062
                    track->codec_priv.size = 0;
1063
                    av_log(matroska->ctx, AV_LOG_ERROR,
1064
                           "Failed to decode codec private data\n");
1065
                } else if (offset > 0) {
1066
                    track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1067
                    memcpy(track->codec_priv.data,
1068
                           encodings[0].compression.settings.data, offset);
1069
                    memcpy(track->codec_priv.data+offset, codec_priv,
1070
                           track->codec_priv.size);
1071
                    track->codec_priv.size += offset;
1072
                }
1073
                if (codec_priv != track->codec_priv.data)
1074
                    av_free(codec_priv);
1075
            }
1076
        }
1077

    
1078
        for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1079
            if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1080
                        strlen(ff_mkv_codec_tags[j].str))){
1081
                codec_id= ff_mkv_codec_tags[j].id;
1082
                break;
1083
            }
1084
        }
1085

    
1086
        st = track->stream = av_new_stream(s, 0);
1087
        if (st == NULL)
1088
            return AVERROR(ENOMEM);
1089

    
1090
        if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1091
            && track->codec_priv.size >= 40
1092
            && track->codec_priv.data != NULL) {
1093
            track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1094
            codec_id = codec_get_id(codec_bmp_tags, track->video.fourcc);
1095
        } else if (!strcmp(track->codec_id, "A_MS/ACM")
1096
                   && track->codec_priv.size >= 18
1097
                   && track->codec_priv.data != NULL) {
1098
            uint16_t tag = AV_RL16(track->codec_priv.data);
1099
            codec_id = codec_get_id(codec_wav_tags, tag);
1100
        } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1101
                   && (track->codec_priv.size >= 86)
1102
                   && (track->codec_priv.data != NULL)) {
1103
            track->video.fourcc = AV_RL32(track->codec_priv.data);
1104
            codec_id=codec_get_id(codec_movvideo_tags, track->video.fourcc);
1105
        } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1106
            int profile = matroska_aac_profile(track->codec_id);
1107
            int sri = matroska_aac_sri(track->audio.samplerate);
1108
            extradata = av_malloc(5);
1109
            if (extradata == NULL)
1110
                return AVERROR(ENOMEM);
1111
            extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1112
            extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1113
            if (strstr(track->codec_id, "SBR")) {
1114
                sri = matroska_aac_sri(track->audio.out_samplerate);
1115
                extradata[2] = 0x56;
1116
                extradata[3] = 0xE5;
1117
                extradata[4] = 0x80 | (sri<<3);
1118
                extradata_size = 5;
1119
            } else
1120
                extradata_size = 2;
1121
        } else if (codec_id == CODEC_ID_TTA) {
1122
            ByteIOContext b;
1123
            extradata_size = 30;
1124
            extradata = av_mallocz(extradata_size);
1125
            if (extradata == NULL)
1126
                return AVERROR(ENOMEM);
1127
            init_put_byte(&b, extradata, extradata_size, 1,
1128
                          NULL, NULL, NULL, NULL);
1129
            put_buffer(&b, "TTA1", 4);
1130
            put_le16(&b, 1);
1131
            put_le16(&b, track->audio.channels);
1132
            put_le16(&b, track->audio.bitdepth);
1133
            put_le32(&b, track->audio.out_samplerate);
1134
            put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1135
        } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1136
                   codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1137
            extradata_offset = 26;
1138
            track->codec_priv.size -= extradata_offset;
1139
        } else if (codec_id == CODEC_ID_RA_144) {
1140
            track->audio.out_samplerate = 8000;
1141
            track->audio.channels = 1;
1142
        } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1143
                   codec_id == CODEC_ID_ATRAC3) {
1144
            ByteIOContext b;
1145

    
1146
            init_put_byte(&b, track->codec_priv.data,track->codec_priv.size,
1147
                          0, NULL, NULL, NULL, NULL);
1148
            url_fskip(&b, 24);
1149
            track->audio.coded_framesize = get_be32(&b);
1150
            url_fskip(&b, 12);
1151
            track->audio.sub_packet_h    = get_be16(&b);
1152
            track->audio.frame_size      = get_be16(&b);
1153
            track->audio.sub_packet_size = get_be16(&b);
1154
            track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1155
            if (codec_id == CODEC_ID_RA_288) {
1156
                st->codec->block_align = track->audio.coded_framesize;
1157
                track->codec_priv.size = 0;
1158
            } else {
1159
                st->codec->block_align = track->audio.sub_packet_size;
1160
                extradata_offset = 78;
1161
                track->codec_priv.size -= extradata_offset;
1162
            }
1163
        }
1164

    
1165
        if (codec_id == CODEC_ID_NONE)
1166
            av_log(matroska->ctx, AV_LOG_INFO,
1167
                   "Unknown/unsupported CodecID %s.\n", track->codec_id);
1168

    
1169
        av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1170

    
1171
        st->codec->codec_id = codec_id;
1172
        st->start_time = 0;
1173
        if (strcmp(track->language, "und"))
1174
            av_strlcpy(st->language, track->language, 4);
1175

    
1176
        if (track->flag_default)
1177
            st->disposition |= AV_DISPOSITION_DEFAULT;
1178

    
1179
        if (track->default_duration)
1180
            av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1181
                      track->default_duration, 1000000000, 30000);
1182

    
1183
        if(extradata){
1184
            st->codec->extradata = extradata;
1185
            st->codec->extradata_size = extradata_size;
1186
        } else if(track->codec_priv.data && track->codec_priv.size > 0){
1187
            st->codec->extradata = av_malloc(track->codec_priv.size);
1188
            if(st->codec->extradata == NULL)
1189
                return AVERROR(ENOMEM);
1190
            st->codec->extradata_size = track->codec_priv.size;
1191
            memcpy(st->codec->extradata,
1192
                   track->codec_priv.data + extradata_offset,
1193
                   track->codec_priv.size);
1194
        }
1195

    
1196
        if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1197
            st->codec->codec_type = CODEC_TYPE_VIDEO;
1198
            st->codec->codec_tag  = track->video.fourcc;
1199
            st->codec->width  = track->video.pixel_width;
1200
            st->codec->height = track->video.pixel_height;
1201
            av_reduce(&st->codec->sample_aspect_ratio.num,
1202
                      &st->codec->sample_aspect_ratio.den,
1203
                      st->codec->height * track->video.display_width,
1204
                      st->codec-> width * track->video.display_height,
1205
                      255);
1206
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
1207
        } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1208
            st->codec->codec_type = CODEC_TYPE_AUDIO;
1209
            st->codec->sample_rate = track->audio.out_samplerate;
1210
            st->codec->channels = track->audio.channels;
1211
        } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1212
            st->codec->codec_type = CODEC_TYPE_SUBTITLE;
1213
        }
1214
    }
1215

    
1216
    attachements = attachements_list->elem;
1217
    for (j=0; j<attachements_list->nb_elem; j++) {
1218
        if (!(attachements[j].filename && attachements[j].mime &&
1219
              attachements[j].bin.data && attachements[j].bin.size > 0)) {
1220
            av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1221
        } else {
1222
            AVStream *st = av_new_stream(s, 0);
1223
            if (st == NULL)
1224
                break;
1225
            st->filename          = av_strdup(attachements[j].filename);
1226
            st->codec->codec_id = CODEC_ID_NONE;
1227
            st->codec->codec_type = CODEC_TYPE_ATTACHMENT;
1228
            st->codec->extradata  = av_malloc(attachements[j].bin.size);
1229
            if(st->codec->extradata == NULL)
1230
                break;
1231
            st->codec->extradata_size = attachements[j].bin.size;
1232
            memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1233

    
1234
            for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1235
                if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1236
                             strlen(ff_mkv_mime_tags[i].str))) {
1237
                    st->codec->codec_id = ff_mkv_mime_tags[i].id;
1238
                    break;
1239
                }
1240
            }
1241
        }
1242
    }
1243

    
1244
    chapters = chapters_list->elem;
1245
    for (i=0; i<chapters_list->nb_elem; i++)
1246
        if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid)
1247
            ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1248
                           chapters[i].start, chapters[i].end,
1249
                           chapters[i].title);
1250

    
1251
    index_list = &matroska->index;
1252
    index = index_list->elem;
1253
    for (i=0; i<index_list->nb_elem; i++) {
1254
        EbmlList *pos_list = &index[i].pos;
1255
        MatroskaIndexPos *pos = pos_list->elem;
1256
        for (j=0; j<pos_list->nb_elem; j++) {
1257
            MatroskaTrack *track = matroska_find_track_by_num(matroska,
1258
                                                              pos[j].track);
1259
            if (track && track->stream)
1260
                av_add_index_entry(track->stream,
1261
                                   pos[j].pos + matroska->segment_start,
1262
                                   index[i].time*matroska->time_scale/AV_TIME_BASE,
1263
                                   0, 0, AVINDEX_KEYFRAME);
1264
        }
1265
    }
1266

    
1267
    return 0;
1268
}
1269

    
1270
/*
1271
 * Put one packet in an application-supplied AVPacket struct.
1272
 * Returns 0 on success or -1 on failure.
1273
 */
1274
static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1275
                                   AVPacket *pkt)
1276
{
1277
    if (matroska->num_packets > 0) {
1278
        memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1279
        av_free(matroska->packets[0]);
1280
        if (matroska->num_packets > 1) {
1281
            memmove(&matroska->packets[0], &matroska->packets[1],
1282
                    (matroska->num_packets - 1) * sizeof(AVPacket *));
1283
            matroska->packets =
1284
                av_realloc(matroska->packets, (matroska->num_packets - 1) *
1285
                           sizeof(AVPacket *));
1286
        } else {
1287
            av_freep(&matroska->packets);
1288
        }
1289
        matroska->num_packets--;
1290
        return 0;
1291
    }
1292

    
1293
    return -1;
1294
}
1295

    
1296
/*
1297
 * Free all packets in our internal queue.
1298
 */
1299
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1300
{
1301
    if (matroska->packets) {
1302
        int n;
1303
        for (n = 0; n < matroska->num_packets; n++) {
1304
            av_free_packet(matroska->packets[n]);
1305
            av_free(matroska->packets[n]);
1306
        }
1307
        av_free(matroska->packets);
1308
        matroska->packets = NULL;
1309
        matroska->num_packets = 0;
1310
    }
1311
}
1312

    
1313
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1314
                                int size, int64_t pos, uint64_t cluster_time,
1315
                                uint64_t duration, int is_keyframe)
1316
{
1317
    MatroskaTrack *track;
1318
    int res = 0;
1319
    AVStream *st;
1320
    AVPacket *pkt;
1321
    int16_t block_time;
1322
    uint32_t *lace_size = NULL;
1323
    int n, flags, laces = 0;
1324
    uint64_t num;
1325

    
1326
    if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1327
        av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1328
        return res;
1329
    }
1330
    data += n;
1331
    size -= n;
1332

    
1333
    track = matroska_find_track_by_num(matroska, num);
1334
    if (size <= 3 || !track || !track->stream) {
1335
        av_log(matroska->ctx, AV_LOG_INFO,
1336
               "Invalid stream %"PRIu64" or size %u\n", num, size);
1337
        return res;
1338
    }
1339
    st = track->stream;
1340
    if (st->discard >= AVDISCARD_ALL)
1341
        return res;
1342
    if (duration == AV_NOPTS_VALUE)
1343
        duration = track->default_duration / matroska->time_scale;
1344

    
1345
    block_time = AV_RB16(data);
1346
    data += 2;
1347
    flags = *data++;
1348
    size -= 3;
1349
    if (is_keyframe == -1)
1350
        is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0;
1351

    
1352
    if (matroska->skip_to_keyframe) {
1353
        if (!is_keyframe || st != matroska->skip_to_stream)
1354
            return res;
1355
        matroska->skip_to_keyframe = 0;
1356
    }
1357

    
1358
    switch ((flags & 0x06) >> 1) {
1359
        case 0x0: /* no lacing */
1360
            laces = 1;
1361
            lace_size = av_mallocz(sizeof(int));
1362
            lace_size[0] = size;
1363
            break;
1364

    
1365
        case 0x1: /* Xiph lacing */
1366
        case 0x2: /* fixed-size lacing */
1367
        case 0x3: /* EBML lacing */
1368
            assert(size>0); // size <=3 is checked before size-=3 above
1369
            laces = (*data) + 1;
1370
            data += 1;
1371
            size -= 1;
1372
            lace_size = av_mallocz(laces * sizeof(int));
1373

    
1374
            switch ((flags & 0x06) >> 1) {
1375
                case 0x1: /* Xiph lacing */ {
1376
                    uint8_t temp;
1377
                    uint32_t total = 0;
1378
                    for (n = 0; res == 0 && n < laces - 1; n++) {
1379
                        while (1) {
1380
                            if (size == 0) {
1381
                                res = -1;
1382
                                break;
1383
                            }
1384
                            temp = *data;
1385
                            lace_size[n] += temp;
1386
                            data += 1;
1387
                            size -= 1;
1388
                            if (temp != 0xff)
1389
                                break;
1390
                        }
1391
                        total += lace_size[n];
1392
                    }
1393
                    lace_size[n] = size - total;
1394
                    break;
1395
                }
1396

    
1397
                case 0x2: /* fixed-size lacing */
1398
                    for (n = 0; n < laces; n++)
1399
                        lace_size[n] = size / laces;
1400
                    break;
1401

    
1402
                case 0x3: /* EBML lacing */ {
1403
                    uint32_t total;
1404
                    n = matroska_ebmlnum_uint(matroska, data, size, &num);
1405
                    if (n < 0) {
1406
                        av_log(matroska->ctx, AV_LOG_INFO,
1407
                               "EBML block data error\n");
1408
                        break;
1409
                    }
1410
                    data += n;
1411
                    size -= n;
1412
                    total = lace_size[0] = num;
1413
                    for (n = 1; res == 0 && n < laces - 1; n++) {
1414
                        int64_t snum;
1415
                        int r;
1416
                        r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1417
                        if (r < 0) {
1418
                            av_log(matroska->ctx, AV_LOG_INFO,
1419
                                   "EBML block data error\n");
1420
                            break;
1421
                        }
1422
                        data += r;
1423
                        size -= r;
1424
                        lace_size[n] = lace_size[n - 1] + snum;
1425
                        total += lace_size[n];
1426
                    }
1427
                    lace_size[n] = size - total;
1428
                    break;
1429
                }
1430
            }
1431
            break;
1432
    }
1433

    
1434
    if (res == 0) {
1435
        uint64_t timecode = AV_NOPTS_VALUE;
1436

    
1437
        if (cluster_time != (uint64_t)-1
1438
            && (block_time >= 0 || cluster_time >= -block_time))
1439
            timecode = cluster_time + block_time;
1440

    
1441
        for (n = 0; n < laces; n++) {
1442
            if (st->codec->codec_id == CODEC_ID_RA_288 ||
1443
                st->codec->codec_id == CODEC_ID_COOK ||
1444
                st->codec->codec_id == CODEC_ID_ATRAC3) {
1445
                int a = st->codec->block_align;
1446
                int sps = track->audio.sub_packet_size;
1447
                int cfs = track->audio.coded_framesize;
1448
                int h = track->audio.sub_packet_h;
1449
                int y = track->audio.sub_packet_cnt;
1450
                int w = track->audio.frame_size;
1451
                int x;
1452

    
1453
                if (!track->audio.pkt_cnt) {
1454
                    if (st->codec->codec_id == CODEC_ID_RA_288)
1455
                        for (x=0; x<h/2; x++)
1456
                            memcpy(track->audio.buf+x*2*w+y*cfs,
1457
                                   data+x*cfs, cfs);
1458
                    else
1459
                        for (x=0; x<w/sps; x++)
1460
                            memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1461

    
1462
                    if (++track->audio.sub_packet_cnt >= h) {
1463
                        track->audio.sub_packet_cnt = 0;
1464
                        track->audio.pkt_cnt = h*w / a;
1465
                    }
1466
                }
1467
                while (track->audio.pkt_cnt) {
1468
                    pkt = av_mallocz(sizeof(AVPacket));
1469
                    av_new_packet(pkt, a);
1470
                    memcpy(pkt->data, track->audio.buf
1471
                           + a * (h*w / a - track->audio.pkt_cnt--), a);
1472
                    pkt->pos = pos;
1473
                    pkt->stream_index = st->index;
1474
                    dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1475
                }
1476
            } else {
1477
                MatroskaTrackEncoding *encodings = track->encodings.elem;
1478
                int offset = 0, pkt_size = lace_size[n];
1479
                uint8_t *pkt_data = data;
1480

    
1481
                if (encodings && encodings->scope & 1) {
1482
                    offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1483
                    if (offset < 0)
1484
                        continue;
1485
                }
1486

    
1487
                pkt = av_mallocz(sizeof(AVPacket));
1488
                /* XXX: prevent data copy... */
1489
                if (av_new_packet(pkt, pkt_size+offset) < 0) {
1490
                    av_free(pkt);
1491
                    res = AVERROR(ENOMEM);
1492
                    n = laces-1;
1493
                    break;
1494
                }
1495
                if (offset)
1496
                    memcpy (pkt->data, encodings->compression.settings.data, offset);
1497
                memcpy (pkt->data+offset, pkt_data, pkt_size);
1498

    
1499
                if (pkt_data != data)
1500
                    av_free(pkt_data);
1501

    
1502
                if (n == 0)
1503
                    pkt->flags = is_keyframe;
1504
                pkt->stream_index = st->index;
1505

    
1506
                pkt->pts = timecode;
1507
                pkt->pos = pos;
1508
                pkt->duration = duration;
1509

    
1510
                dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
1511
            }
1512

    
1513
            if (timecode != AV_NOPTS_VALUE)
1514
                timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1515
            data += lace_size[n];
1516
        }
1517
    }
1518

    
1519
    av_free(lace_size);
1520
    return res;
1521
}
1522

    
1523
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1524
{
1525
    MatroskaCluster cluster = { 0 };
1526
    EbmlList *blocks_list;
1527
    MatroskaBlock *blocks;
1528
    int i, res;
1529
    if (matroska->has_cluster_id){
1530
        /* For the first cluster we parse, its ID was already read as
1531
           part of matroska_read_header(), so don't read it again */
1532
        res = ebml_parse_id(matroska, matroska_clusters,
1533
                            MATROSKA_ID_CLUSTER, &cluster);
1534
        matroska->has_cluster_id = 0;
1535
    } else
1536
        res = ebml_parse(matroska, matroska_clusters, &cluster);
1537
    blocks_list = &cluster.blocks;
1538
    blocks = blocks_list->elem;
1539
    for (i=0; !res && i<blocks_list->nb_elem; i++)
1540
        if (blocks[i].bin.size > 0)
1541
            res=matroska_parse_block(matroska,
1542
                                     blocks[i].bin.data, blocks[i].bin.size,
1543
                                     blocks[i].bin.pos,  cluster.timecode,
1544
                                     blocks[i].duration, !blocks[i].reference);
1545
    ebml_free(matroska_cluster, &cluster);
1546
    return res;
1547
}
1548

    
1549
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1550
{
1551
    MatroskaDemuxContext *matroska = s->priv_data;
1552

    
1553
    while (matroska_deliver_packet(matroska, pkt)) {
1554
        if (matroska->done)
1555
            return AVERROR(EIO);
1556
        if (matroska_parse_cluster(matroska) < 0)
1557
            matroska->done = 1;
1558
    }
1559

    
1560
    return 0;
1561
}
1562

    
1563
static int matroska_read_seek(AVFormatContext *s, int stream_index,
1564
                              int64_t timestamp, int flags)
1565
{
1566
    MatroskaDemuxContext *matroska = s->priv_data;
1567
    AVStream *st = s->streams[stream_index];
1568
    int index;
1569

    
1570
    index = av_index_search_timestamp(st, timestamp, flags);
1571
    if (index < 0)
1572
        return 0;
1573

    
1574
    matroska_clear_queue(matroska);
1575

    
1576
    url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
1577
    matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1578
    matroska->skip_to_stream = st;
1579
    av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1580
    return 0;
1581
}
1582

    
1583
static int matroska_read_close(AVFormatContext *s)
1584
{
1585
    MatroskaDemuxContext *matroska = s->priv_data;
1586
    MatroskaTrack *tracks = matroska->tracks.elem;
1587
    int n;
1588

    
1589
    matroska_clear_queue(matroska);
1590

    
1591
    for (n=0; n < matroska->tracks.nb_elem; n++)
1592
        if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1593
            av_free(tracks[n].audio.buf);
1594
    ebml_free(matroska_segment, matroska);
1595

    
1596
    return 0;
1597
}
1598

    
1599
AVInputFormat matroska_demuxer = {
1600
    "matroska",
1601
    NULL_IF_CONFIG_SMALL("Matroska file format"),
1602
    sizeof(MatroskaDemuxContext),
1603
    matroska_probe,
1604
    matroska_read_header,
1605
    matroska_read_packet,
1606
    matroska_read_close,
1607
    matroska_read_seek,
1608
};