ffmpeg / libavformat / matroskadec.c @ 051ef5ce
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/*
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* Matroska file demuxer (no muxer yet)
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* Copyright (c) 2003-2004 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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* Specs available on the matroska project page:
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* 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; |
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|
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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; |
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typedef struct { |
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int nb_elem;
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void *elem;
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} EbmlList; |
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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; |
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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; |
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typedef struct { |
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uint64_t algo; |
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EbmlBin settings; |
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} MatroskaTrackCompression; |
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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; |
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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; |
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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; |
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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; |
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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;
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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; |
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AVStream *stream; |
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} MatroskaTrack; |
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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; |
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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; |
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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; |
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typedef struct { |
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uint64_t time; |
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EbmlList pos; |
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} MatroskaIndex; |
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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; |
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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; |
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typedef struct { |
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AVFormatContext *ctx; |
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/* ebml stuff */
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int num_levels;
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MatroskaLevel levels[EBML_MAX_DEPTH]; |
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int level_up;
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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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/* num_streams is the number of streams that av_new_stream() was called
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* for ( = that are available to the calling program). */
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int num_streams;
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/* cache for ID peeking */
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uint32_t peek_id; |
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/* byte position of the segment inside the stream */
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offset_t segment_start; |
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/* The packet queue. */
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AVPacket **packets; |
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int num_packets;
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int done;
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int has_cluster_id;
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/* 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; |
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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; |
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} MatroskaBlock; |
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typedef struct { |
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uint64_t timecode; |
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EbmlList blocks; |
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} MatroskaCluster; |
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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 },
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{ 0 }
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}; |
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static EbmlSyntax ebml_syntax[] = {
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{ EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
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{ 0 }
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}; |
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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 }
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}; |
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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 }
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}; |
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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) },
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{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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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} },
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{ MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_track_encoding[] = {
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{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
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{ 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} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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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} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_track[] = {
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{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
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{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
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{ MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
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{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
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{ MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
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{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
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{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
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{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
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{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
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{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
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{ MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
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{ MATROSKA_ID_TRACKUID, EBML_NONE },
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{ MATROSKA_ID_TRACKNAME, EBML_NONE },
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{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
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{ MATROSKA_ID_TRACKFLAGFORCED, EBML_NONE },
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{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
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{ MATROSKA_ID_CODECNAME, EBML_NONE },
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{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
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{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
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{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
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{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
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{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_tracks[] = {
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{ MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_attachment[] = {
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{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
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{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
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{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
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{ MATROSKA_ID_FILEUID, EBML_NONE },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_attachments[] = {
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{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_chapter_display[] = {
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{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_chapter_entry[] = {
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{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
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{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
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{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
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{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
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{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_chapter[] = {
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{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
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{ MATROSKA_ID_EDITIONUID, EBML_NONE },
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{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
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{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_chapters[] = {
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{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_index_pos[] = {
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{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
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{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_index_entry[] = {
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{ MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
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{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_index[] = {
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{ MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_tags[] = {
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{ EBML_ID_VOID, EBML_NONE },
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{ 0 }
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}; |
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static EbmlSyntax matroska_seekhead_entry[] = {
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{ MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
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{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
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{ EBML_ID_VOID, EBML_NONE },
|
| 409 |
{ 0 }
|
| 410 |
}; |
| 411 |
|
| 412 |
static EbmlSyntax matroska_seekhead[] = {
|
| 413 |
{ MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
|
| 414 |
{ EBML_ID_VOID, EBML_NONE },
|
| 415 |
{ 0 }
|
| 416 |
}; |
| 417 |
|
| 418 |
static EbmlSyntax matroska_segment[] = {
|
| 419 |
{ MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
|
| 420 |
{ MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
|
| 421 |
{ MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
|
| 422 |
{ MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
|
| 423 |
{ MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
|
| 424 |
{ MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
|
| 425 |
{ MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
|
| 426 |
{ MATROSKA_ID_CLUSTER, EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) },
|
| 427 |
{ EBML_ID_VOID, EBML_NONE },
|
| 428 |
{ 0 }
|
| 429 |
}; |
| 430 |
|
| 431 |
static EbmlSyntax matroska_segments[] = {
|
| 432 |
{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
|
| 433 |
{ 0 }
|
| 434 |
}; |
| 435 |
|
| 436 |
static EbmlSyntax matroska_blockgroup[] = {
|
| 437 |
{ MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
|
| 438 |
{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
|
| 439 |
{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
|
| 440 |
{ MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
|
| 441 |
{ EBML_ID_VOID, EBML_NONE },
|
| 442 |
{ 0 }
|
| 443 |
}; |
| 444 |
|
| 445 |
static EbmlSyntax matroska_cluster[] = {
|
| 446 |
{ MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
|
| 447 |
{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
|
| 448 |
{ MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
|
| 449 |
{ EBML_ID_VOID, EBML_NONE },
|
| 450 |
{ 0 }
|
| 451 |
}; |
| 452 |
|
| 453 |
static EbmlSyntax matroska_clusters[] = {
|
| 454 |
{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
|
| 455 |
{ 0 }
|
| 456 |
}; |
| 457 |
|
| 458 |
/*
|
| 459 |
* Return: the amount of levels in the hierarchy that the
|
| 460 |
* current element lies higher than the previous one.
|
| 461 |
* The opposite isn't done - that's auto-done using master
|
| 462 |
* element reading.
|
| 463 |
*/
|
| 464 |
static int |
| 465 |
ebml_read_element_level_up (MatroskaDemuxContext *matroska) |
| 466 |
{
|
| 467 |
ByteIOContext *pb = matroska->ctx->pb; |
| 468 |
offset_t pos = url_ftell(pb); |
| 469 |
int num = 0; |
| 470 |
|
| 471 |
while (matroska->num_levels > 0) { |
| 472 |
MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
|
| 473 |
|
| 474 |
if (pos >= level->start + level->length) {
|
| 475 |
matroska->num_levels--; |
| 476 |
num++; |
| 477 |
} else {
|
| 478 |
break;
|
| 479 |
} |
| 480 |
} |
| 481 |
|
| 482 |
return num;
|
| 483 |
} |
| 484 |
|
| 485 |
/*
|
| 486 |
* Read: an "EBML number", which is defined as a variable-length
|
| 487 |
* array of bytes. The first byte indicates the length by giving a
|
| 488 |
* number of 0-bits followed by a one. The position of the first
|
| 489 |
* "one" bit inside the first byte indicates the length of this
|
| 490 |
* number.
|
| 491 |
* Returns: num. of bytes read. < 0 on error.
|
| 492 |
*/
|
| 493 |
static int |
| 494 |
ebml_read_num (MatroskaDemuxContext *matroska, |
| 495 |
int max_size,
|
| 496 |
uint64_t *number) |
| 497 |
{
|
| 498 |
ByteIOContext *pb = matroska->ctx->pb; |
| 499 |
int len_mask = 0x80, read = 1, n = 1; |
| 500 |
int64_t total = 0;
|
| 501 |
|
| 502 |
/* the first byte tells us the length in bytes - get_byte() can normally
|
| 503 |
* return 0, but since that's not a valid first ebmlID byte, we can
|
| 504 |
* use it safely here to catch EOS. */
|
| 505 |
if (!(total = get_byte(pb))) {
|
| 506 |
/* we might encounter EOS here */
|
| 507 |
if (!url_feof(pb)) {
|
| 508 |
offset_t pos = url_ftell(pb); |
| 509 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 510 |
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", |
| 511 |
pos, pos); |
| 512 |
} |
| 513 |
return AVERROR(EIO); /* EOS or actual I/O error */ |
| 514 |
} |
| 515 |
|
| 516 |
/* get the length of the EBML number */
|
| 517 |
while (read <= max_size && !(total & len_mask)) {
|
| 518 |
read++; |
| 519 |
len_mask >>= 1;
|
| 520 |
} |
| 521 |
if (read > max_size) {
|
| 522 |
offset_t pos = url_ftell(pb) - 1;
|
| 523 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 524 |
"Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", |
| 525 |
(uint8_t) total, pos, pos); |
| 526 |
return AVERROR_INVALIDDATA;
|
| 527 |
} |
| 528 |
|
| 529 |
/* read out length */
|
| 530 |
total &= ~len_mask; |
| 531 |
while (n++ < read)
|
| 532 |
total = (total << 8) | get_byte(pb);
|
| 533 |
|
| 534 |
*number = total; |
| 535 |
|
| 536 |
return read;
|
| 537 |
} |
| 538 |
|
| 539 |
/*
|
| 540 |
* Read: the element content data ID.
|
| 541 |
* Return: the number of bytes read or < 0 on error.
|
| 542 |
*/
|
| 543 |
static int |
| 544 |
ebml_read_element_id (MatroskaDemuxContext *matroska, |
| 545 |
uint32_t *id, |
| 546 |
int *level_up)
|
| 547 |
{
|
| 548 |
int read;
|
| 549 |
uint64_t total; |
| 550 |
|
| 551 |
/* if we re-call this, use our cached ID */
|
| 552 |
if (matroska->peek_id != 0) { |
| 553 |
if (level_up)
|
| 554 |
*level_up = 0;
|
| 555 |
*id = matroska->peek_id; |
| 556 |
return 0; |
| 557 |
} |
| 558 |
|
| 559 |
/* read out the "EBML number", include tag in ID */
|
| 560 |
if ((read = ebml_read_num(matroska, 4, &total)) < 0) |
| 561 |
return read;
|
| 562 |
*id = matroska->peek_id = total | (1 << (read * 7)); |
| 563 |
|
| 564 |
/* level tracking */
|
| 565 |
if (level_up)
|
| 566 |
*level_up = ebml_read_element_level_up(matroska); |
| 567 |
|
| 568 |
return read;
|
| 569 |
} |
| 570 |
|
| 571 |
/*
|
| 572 |
* Read: element content length.
|
| 573 |
* Return: the number of bytes read or < 0 on error.
|
| 574 |
*/
|
| 575 |
static int |
| 576 |
ebml_read_element_length (MatroskaDemuxContext *matroska, |
| 577 |
uint64_t *length) |
| 578 |
{
|
| 579 |
/* clear cache since we're now beyond that data point */
|
| 580 |
matroska->peek_id = 0;
|
| 581 |
|
| 582 |
/* read out the "EBML number", include tag in ID */
|
| 583 |
return ebml_read_num(matroska, 8, length); |
| 584 |
} |
| 585 |
|
| 586 |
/*
|
| 587 |
* Return: the ID of the next element, or 0 on error.
|
| 588 |
* Level_up contains the amount of levels that this
|
| 589 |
* next element lies higher than the previous one.
|
| 590 |
*/
|
| 591 |
static uint32_t
|
| 592 |
ebml_peek_id (MatroskaDemuxContext *matroska, |
| 593 |
int *level_up)
|
| 594 |
{
|
| 595 |
uint32_t id; |
| 596 |
|
| 597 |
if (ebml_read_element_id(matroska, &id, level_up) < 0) |
| 598 |
return 0; |
| 599 |
|
| 600 |
return id;
|
| 601 |
} |
| 602 |
|
| 603 |
/*
|
| 604 |
* Seek to a given offset.
|
| 605 |
* 0 is success, -1 is failure.
|
| 606 |
*/
|
| 607 |
static int |
| 608 |
ebml_read_seek (MatroskaDemuxContext *matroska, |
| 609 |
offset_t offset) |
| 610 |
{
|
| 611 |
ByteIOContext *pb = matroska->ctx->pb; |
| 612 |
|
| 613 |
/* clear ID cache, if any */
|
| 614 |
matroska->peek_id = 0;
|
| 615 |
|
| 616 |
return (url_fseek(pb, offset, SEEK_SET) == offset) ? 0 : -1; |
| 617 |
} |
| 618 |
|
| 619 |
/*
|
| 620 |
* Skip the next element.
|
| 621 |
* 0 is success, -1 is failure.
|
| 622 |
*/
|
| 623 |
static int |
| 624 |
ebml_read_skip (MatroskaDemuxContext *matroska) |
| 625 |
{
|
| 626 |
ByteIOContext *pb = matroska->ctx->pb; |
| 627 |
uint32_t id; |
| 628 |
uint64_t length; |
| 629 |
int res;
|
| 630 |
|
| 631 |
if ((res = ebml_read_element_id(matroska, &id, NULL)) < 0 || |
| 632 |
(res = ebml_read_element_length(matroska, &length)) < 0)
|
| 633 |
return res;
|
| 634 |
|
| 635 |
url_fskip(pb, length); |
| 636 |
|
| 637 |
return 0; |
| 638 |
} |
| 639 |
|
| 640 |
/*
|
| 641 |
* Read the next element as an unsigned int.
|
| 642 |
* 0 is success, < 0 is failure.
|
| 643 |
*/
|
| 644 |
static int |
| 645 |
ebml_read_uint (MatroskaDemuxContext *matroska, |
| 646 |
uint32_t *id, |
| 647 |
uint64_t *num) |
| 648 |
{
|
| 649 |
ByteIOContext *pb = matroska->ctx->pb; |
| 650 |
int n = 0, size, res; |
| 651 |
uint64_t rlength; |
| 652 |
|
| 653 |
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
| 654 |
(res = ebml_read_element_length(matroska, &rlength)) < 0)
|
| 655 |
return res;
|
| 656 |
size = rlength; |
| 657 |
if (size < 1 || size > 8) { |
| 658 |
offset_t pos = url_ftell(pb); |
| 659 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 660 |
"Invalid uint element size %d at position %"PRId64" (0x%"PRIx64")\n", |
| 661 |
size, pos, pos); |
| 662 |
return AVERROR_INVALIDDATA;
|
| 663 |
} |
| 664 |
|
| 665 |
/* big-endian ordening; build up number */
|
| 666 |
*num = 0;
|
| 667 |
while (n++ < size)
|
| 668 |
*num = (*num << 8) | get_byte(pb);
|
| 669 |
|
| 670 |
return 0; |
| 671 |
} |
| 672 |
|
| 673 |
/*
|
| 674 |
* Read the next element as a float.
|
| 675 |
* 0 is success, < 0 is failure.
|
| 676 |
*/
|
| 677 |
static int |
| 678 |
ebml_read_float (MatroskaDemuxContext *matroska, |
| 679 |
uint32_t *id, |
| 680 |
double *num)
|
| 681 |
{
|
| 682 |
ByteIOContext *pb = matroska->ctx->pb; |
| 683 |
int size, res;
|
| 684 |
uint64_t rlength; |
| 685 |
|
| 686 |
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
| 687 |
(res = ebml_read_element_length(matroska, &rlength)) < 0)
|
| 688 |
return res;
|
| 689 |
size = rlength; |
| 690 |
|
| 691 |
if (size == 4) { |
| 692 |
*num= av_int2flt(get_be32(pb)); |
| 693 |
} else if(size==8){ |
| 694 |
*num= av_int2dbl(get_be64(pb)); |
| 695 |
} else{
|
| 696 |
offset_t pos = url_ftell(pb); |
| 697 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 698 |
"Invalid float element size %d at position %"PRIu64" (0x%"PRIx64")\n", |
| 699 |
size, pos, pos); |
| 700 |
return AVERROR_INVALIDDATA;
|
| 701 |
} |
| 702 |
|
| 703 |
return 0; |
| 704 |
} |
| 705 |
|
| 706 |
/*
|
| 707 |
* Read the next element as an ASCII string.
|
| 708 |
* 0 is success, < 0 is failure.
|
| 709 |
*/
|
| 710 |
static int |
| 711 |
ebml_read_ascii (MatroskaDemuxContext *matroska, |
| 712 |
uint32_t *id, |
| 713 |
char **str)
|
| 714 |
{
|
| 715 |
ByteIOContext *pb = matroska->ctx->pb; |
| 716 |
int size, res;
|
| 717 |
uint64_t rlength; |
| 718 |
|
| 719 |
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
| 720 |
(res = ebml_read_element_length(matroska, &rlength)) < 0)
|
| 721 |
return res;
|
| 722 |
size = rlength; |
| 723 |
|
| 724 |
/* ebml strings are usually not 0-terminated, so we allocate one
|
| 725 |
* byte more, read the string and NULL-terminate it ourselves. */
|
| 726 |
if (size < 0 || !(*str = av_malloc(size + 1))) { |
| 727 |
av_log(matroska->ctx, AV_LOG_ERROR, "Memory allocation failed\n");
|
| 728 |
return AVERROR(ENOMEM);
|
| 729 |
} |
| 730 |
if (get_buffer(pb, (uint8_t *) *str, size) != size) {
|
| 731 |
offset_t pos = url_ftell(pb); |
| 732 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 733 |
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); |
| 734 |
av_free(*str); |
| 735 |
return AVERROR(EIO);
|
| 736 |
} |
| 737 |
(*str)[size] = '\0';
|
| 738 |
|
| 739 |
return 0; |
| 740 |
} |
| 741 |
|
| 742 |
/*
|
| 743 |
* Read the next element, but only the header. The contents
|
| 744 |
* are supposed to be sub-elements which can be read separately.
|
| 745 |
* 0 is success, < 0 is failure.
|
| 746 |
*/
|
| 747 |
static int |
| 748 |
ebml_read_master (MatroskaDemuxContext *matroska, |
| 749 |
uint32_t *id) |
| 750 |
{
|
| 751 |
ByteIOContext *pb = matroska->ctx->pb; |
| 752 |
uint64_t length; |
| 753 |
MatroskaLevel *level; |
| 754 |
int res;
|
| 755 |
|
| 756 |
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
| 757 |
(res = ebml_read_element_length(matroska, &length)) < 0)
|
| 758 |
return res;
|
| 759 |
|
| 760 |
if (matroska->num_levels >= EBML_MAX_DEPTH) {
|
| 761 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 762 |
"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
|
| 763 |
return AVERROR(ENOSYS);
|
| 764 |
} |
| 765 |
|
| 766 |
level = &matroska->levels[matroska->num_levels++]; |
| 767 |
level->start = url_ftell(pb); |
| 768 |
level->length = length; |
| 769 |
|
| 770 |
return 0; |
| 771 |
} |
| 772 |
|
| 773 |
/*
|
| 774 |
* Read the next element as binary data.
|
| 775 |
* 0 is success, < 0 is failure.
|
| 776 |
*/
|
| 777 |
static int |
| 778 |
ebml_read_binary (MatroskaDemuxContext *matroska, |
| 779 |
uint32_t *id, |
| 780 |
uint8_t **binary, |
| 781 |
int *size)
|
| 782 |
{
|
| 783 |
ByteIOContext *pb = matroska->ctx->pb; |
| 784 |
uint64_t rlength; |
| 785 |
int res;
|
| 786 |
|
| 787 |
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
| 788 |
(res = ebml_read_element_length(matroska, &rlength)) < 0)
|
| 789 |
return res;
|
| 790 |
*size = rlength; |
| 791 |
|
| 792 |
if (!(*binary = av_malloc(*size))) {
|
| 793 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 794 |
"Memory allocation error\n");
|
| 795 |
return AVERROR(ENOMEM);
|
| 796 |
} |
| 797 |
|
| 798 |
if (get_buffer(pb, *binary, *size) != *size) {
|
| 799 |
offset_t pos = url_ftell(pb); |
| 800 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 801 |
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); |
| 802 |
return AVERROR(EIO);
|
| 803 |
} |
| 804 |
|
| 805 |
return 0; |
| 806 |
} |
| 807 |
|
| 808 |
/*
|
| 809 |
* Read signed/unsigned "EBML" numbers.
|
| 810 |
* Return: number of bytes processed, < 0 on error.
|
| 811 |
* XXX: use ebml_read_num().
|
| 812 |
*/
|
| 813 |
static int |
| 814 |
matroska_ebmlnum_uint (uint8_t *data, |
| 815 |
uint32_t size, |
| 816 |
uint64_t *num) |
| 817 |
{
|
| 818 |
int len_mask = 0x80, read = 1, n = 1, num_ffs = 0; |
| 819 |
uint64_t total; |
| 820 |
|
| 821 |
if (size <= 0) |
| 822 |
return AVERROR_INVALIDDATA;
|
| 823 |
|
| 824 |
total = data[0];
|
| 825 |
while (read <= 8 && !(total & len_mask)) { |
| 826 |
read++; |
| 827 |
len_mask >>= 1;
|
| 828 |
} |
| 829 |
if (read > 8) |
| 830 |
return AVERROR_INVALIDDATA;
|
| 831 |
|
| 832 |
if ((total &= (len_mask - 1)) == len_mask - 1) |
| 833 |
num_ffs++; |
| 834 |
if (size < read)
|
| 835 |
return AVERROR_INVALIDDATA;
|
| 836 |
while (n < read) {
|
| 837 |
if (data[n] == 0xff) |
| 838 |
num_ffs++; |
| 839 |
total = (total << 8) | data[n];
|
| 840 |
n++; |
| 841 |
} |
| 842 |
|
| 843 |
if (read == num_ffs)
|
| 844 |
*num = (uint64_t)-1;
|
| 845 |
else
|
| 846 |
*num = total; |
| 847 |
|
| 848 |
return read;
|
| 849 |
} |
| 850 |
|
| 851 |
/*
|
| 852 |
* Same as above, but signed.
|
| 853 |
*/
|
| 854 |
static int |
| 855 |
matroska_ebmlnum_sint (uint8_t *data, |
| 856 |
uint32_t size, |
| 857 |
int64_t *num) |
| 858 |
{
|
| 859 |
uint64_t unum; |
| 860 |
int res;
|
| 861 |
|
| 862 |
/* read as unsigned number first */
|
| 863 |
if ((res = matroska_ebmlnum_uint(data, size, &unum)) < 0) |
| 864 |
return res;
|
| 865 |
|
| 866 |
/* make signed (weird way) */
|
| 867 |
if (unum == (uint64_t)-1) |
| 868 |
*num = INT64_MAX; |
| 869 |
else
|
| 870 |
*num = unum - ((1LL << ((7 * res) - 1)) - 1); |
| 871 |
|
| 872 |
return res;
|
| 873 |
} |
| 874 |
|
| 875 |
|
| 876 |
static MatroskaTrack *
|
| 877 |
matroska_find_track_by_num (MatroskaDemuxContext *matroska, |
| 878 |
int num)
|
| 879 |
{
|
| 880 |
MatroskaTrack *tracks = matroska->tracks.elem; |
| 881 |
int i;
|
| 882 |
|
| 883 |
for (i=0; i < matroska->tracks.nb_elem; i++) |
| 884 |
if (tracks[i].num == num)
|
| 885 |
return &tracks[i];
|
| 886 |
|
| 887 |
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
|
| 888 |
return NULL; |
| 889 |
} |
| 890 |
|
| 891 |
|
| 892 |
/*
|
| 893 |
* Put one packet in an application-supplied AVPacket struct.
|
| 894 |
* Returns 0 on success or -1 on failure.
|
| 895 |
*/
|
| 896 |
static int |
| 897 |
matroska_deliver_packet (MatroskaDemuxContext *matroska, |
| 898 |
AVPacket *pkt) |
| 899 |
{
|
| 900 |
if (matroska->num_packets > 0) { |
| 901 |
memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); |
| 902 |
av_free(matroska->packets[0]);
|
| 903 |
if (matroska->num_packets > 1) { |
| 904 |
memmove(&matroska->packets[0], &matroska->packets[1], |
| 905 |
(matroska->num_packets - 1) * sizeof(AVPacket *)); |
| 906 |
matroska->packets = |
| 907 |
av_realloc(matroska->packets, (matroska->num_packets - 1) *
|
| 908 |
sizeof(AVPacket *));
|
| 909 |
} else {
|
| 910 |
av_freep(&matroska->packets); |
| 911 |
} |
| 912 |
matroska->num_packets--; |
| 913 |
return 0; |
| 914 |
} |
| 915 |
|
| 916 |
return -1; |
| 917 |
} |
| 918 |
|
| 919 |
/*
|
| 920 |
* Put a packet into our internal queue. Will be delivered to the
|
| 921 |
* user/application during the next get_packet() call.
|
| 922 |
*/
|
| 923 |
static void |
| 924 |
matroska_queue_packet (MatroskaDemuxContext *matroska, |
| 925 |
AVPacket *pkt) |
| 926 |
{
|
| 927 |
matroska->packets = |
| 928 |
av_realloc(matroska->packets, (matroska->num_packets + 1) *
|
| 929 |
sizeof(AVPacket *));
|
| 930 |
matroska->packets[matroska->num_packets] = pkt; |
| 931 |
matroska->num_packets++; |
| 932 |
} |
| 933 |
|
| 934 |
/*
|
| 935 |
* Free all packets in our internal queue.
|
| 936 |
*/
|
| 937 |
static void |
| 938 |
matroska_clear_queue (MatroskaDemuxContext *matroska) |
| 939 |
{
|
| 940 |
if (matroska->packets) {
|
| 941 |
int n;
|
| 942 |
for (n = 0; n < matroska->num_packets; n++) { |
| 943 |
av_free_packet(matroska->packets[n]); |
| 944 |
av_free(matroska->packets[n]); |
| 945 |
} |
| 946 |
av_free(matroska->packets); |
| 947 |
matroska->packets = NULL;
|
| 948 |
matroska->num_packets = 0;
|
| 949 |
} |
| 950 |
} |
| 951 |
|
| 952 |
|
| 953 |
/*
|
| 954 |
* Autodetecting...
|
| 955 |
*/
|
| 956 |
static int |
| 957 |
matroska_probe (AVProbeData *p) |
| 958 |
{
|
| 959 |
uint64_t total = 0;
|
| 960 |
int len_mask = 0x80, size = 1, n = 1; |
| 961 |
uint8_t probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' };
|
| 962 |
|
| 963 |
/* ebml header? */
|
| 964 |
if (AV_RB32(p->buf) != EBML_ID_HEADER)
|
| 965 |
return 0; |
| 966 |
|
| 967 |
/* length of header */
|
| 968 |
total = p->buf[4];
|
| 969 |
while (size <= 8 && !(total & len_mask)) { |
| 970 |
size++; |
| 971 |
len_mask >>= 1;
|
| 972 |
} |
| 973 |
if (size > 8) |
| 974 |
return 0; |
| 975 |
total &= (len_mask - 1);
|
| 976 |
while (n < size)
|
| 977 |
total = (total << 8) | p->buf[4 + n++]; |
| 978 |
|
| 979 |
/* does the probe data contain the whole header? */
|
| 980 |
if (p->buf_size < 4 + size + total) |
| 981 |
return 0; |
| 982 |
|
| 983 |
/* the header must contain the document type 'matroska'. For now,
|
| 984 |
* we don't parse the whole header but simply check for the
|
| 985 |
* availability of that array of characters inside the header.
|
| 986 |
* Not fully fool-proof, but good enough. */
|
| 987 |
for (n = 4 + size; n <= 4 + size + total - sizeof(probe_data); n++) |
| 988 |
if (!memcmp (&p->buf[n], probe_data, sizeof(probe_data))) |
| 989 |
return AVPROBE_SCORE_MAX;
|
| 990 |
|
| 991 |
return 0; |
| 992 |
} |
| 993 |
|
| 994 |
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, |
| 995 |
void *data, uint32_t expected_id, int once); |
| 996 |
|
| 997 |
static int ebml_parse_elem(MatroskaDemuxContext *matroska, |
| 998 |
EbmlSyntax *syntax, void *data)
|
| 999 |
{
|
| 1000 |
uint32_t id = syntax->id; |
| 1001 |
EbmlBin *bin; |
| 1002 |
int res;
|
| 1003 |
|
| 1004 |
data = (char *)data + syntax->data_offset;
|
| 1005 |
if (syntax->list_elem_size) {
|
| 1006 |
EbmlList *list = data; |
| 1007 |
list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
|
| 1008 |
data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
|
| 1009 |
memset(data, 0, syntax->list_elem_size);
|
| 1010 |
list->nb_elem++; |
| 1011 |
} |
| 1012 |
bin = data; |
| 1013 |
|
| 1014 |
switch (syntax->type) {
|
| 1015 |
case EBML_UINT: return ebml_read_uint (matroska, &id, data); |
| 1016 |
case EBML_FLOAT: return ebml_read_float(matroska, &id, data); |
| 1017 |
case EBML_STR:
|
| 1018 |
case EBML_UTF8: av_free(*(char **)data); |
| 1019 |
return ebml_read_ascii(matroska, &id, data);
|
| 1020 |
case EBML_BIN: av_free(bin->data);
|
| 1021 |
bin->pos = url_ftell(matroska->ctx->pb); |
| 1022 |
return ebml_read_binary(matroska, &id, &bin->data,
|
| 1023 |
&bin->size); |
| 1024 |
case EBML_NEST: if ((res=ebml_read_master(matroska, &id)) < 0) |
| 1025 |
return res;
|
| 1026 |
if (id == MATROSKA_ID_SEGMENT)
|
| 1027 |
matroska->segment_start = url_ftell(matroska->ctx->pb); |
| 1028 |
return ebml_parse(matroska, syntax->def.n, data, 0, 0); |
| 1029 |
case EBML_PASS: return ebml_parse(matroska, syntax->def.n, data, 0, 1); |
| 1030 |
case EBML_STOP: *(int *)data = 1; return 1; |
| 1031 |
default: return ebml_read_skip(matroska); |
| 1032 |
} |
| 1033 |
} |
| 1034 |
|
| 1035 |
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, |
| 1036 |
uint32_t id, void *data)
|
| 1037 |
{
|
| 1038 |
int i;
|
| 1039 |
for (i=0; syntax[i].id; i++) |
| 1040 |
if (id == syntax[i].id)
|
| 1041 |
break;
|
| 1042 |
if (!syntax[i].id)
|
| 1043 |
av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
|
| 1044 |
return ebml_parse_elem(matroska, &syntax[i], data);
|
| 1045 |
} |
| 1046 |
|
| 1047 |
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, |
| 1048 |
void *data, uint32_t expected_id, int once) |
| 1049 |
{
|
| 1050 |
int i, res = 0; |
| 1051 |
uint32_t id = 0;
|
| 1052 |
|
| 1053 |
for (i=0; syntax[i].id; i++) |
| 1054 |
switch (syntax[i].type) {
|
| 1055 |
case EBML_UINT:
|
| 1056 |
*(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
|
| 1057 |
break;
|
| 1058 |
case EBML_FLOAT:
|
| 1059 |
*(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f; |
| 1060 |
break;
|
| 1061 |
case EBML_STR:
|
| 1062 |
case EBML_UTF8:
|
| 1063 |
*(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s); |
| 1064 |
break;
|
| 1065 |
} |
| 1066 |
|
| 1067 |
if (expected_id) {
|
| 1068 |
res = ebml_read_master(matroska, &id); |
| 1069 |
if (id != expected_id)
|
| 1070 |
return AVERROR_INVALIDDATA;
|
| 1071 |
if (id == MATROSKA_ID_SEGMENT)
|
| 1072 |
matroska->segment_start = url_ftell(matroska->ctx->pb); |
| 1073 |
} |
| 1074 |
|
| 1075 |
while (!res) {
|
| 1076 |
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
|
| 1077 |
res = AVERROR(EIO); |
| 1078 |
break;
|
| 1079 |
} else if (matroska->level_up) { |
| 1080 |
matroska->level_up--; |
| 1081 |
break;
|
| 1082 |
} |
| 1083 |
|
| 1084 |
res = ebml_parse_id(matroska, syntax, id, data); |
| 1085 |
if (once)
|
| 1086 |
break;
|
| 1087 |
|
| 1088 |
if (matroska->level_up) {
|
| 1089 |
matroska->level_up--; |
| 1090 |
break;
|
| 1091 |
} |
| 1092 |
} |
| 1093 |
|
| 1094 |
return res;
|
| 1095 |
} |
| 1096 |
|
| 1097 |
static void ebml_free(EbmlSyntax *syntax, void *data) |
| 1098 |
{
|
| 1099 |
int i, j;
|
| 1100 |
for (i=0; syntax[i].id; i++) { |
| 1101 |
void *data_off = (char *)data + syntax[i].data_offset; |
| 1102 |
switch (syntax[i].type) {
|
| 1103 |
case EBML_STR:
|
| 1104 |
case EBML_UTF8: av_freep(data_off); break; |
| 1105 |
case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break; |
| 1106 |
case EBML_NEST:
|
| 1107 |
if (syntax[i].list_elem_size) {
|
| 1108 |
EbmlList *list = data_off; |
| 1109 |
char *ptr = list->elem;
|
| 1110 |
for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size) |
| 1111 |
ebml_free(syntax[i].def.n, ptr); |
| 1112 |
av_free(list->elem); |
| 1113 |
} else
|
| 1114 |
ebml_free(syntax[i].def.n, data_off); |
| 1115 |
default: break; |
| 1116 |
} |
| 1117 |
} |
| 1118 |
} |
| 1119 |
|
| 1120 |
static int |
| 1121 |
matroska_decode_buffer(uint8_t** buf, int* buf_size, MatroskaTrack *track)
|
| 1122 |
{
|
| 1123 |
MatroskaTrackEncoding *encodings = track->encodings.elem; |
| 1124 |
uint8_t* data = *buf; |
| 1125 |
int isize = *buf_size;
|
| 1126 |
uint8_t* pkt_data = NULL;
|
| 1127 |
int pkt_size = isize;
|
| 1128 |
int result = 0; |
| 1129 |
int olen;
|
| 1130 |
|
| 1131 |
switch (encodings[0].compression.algo) { |
| 1132 |
case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
|
| 1133 |
return encodings[0].compression.settings.size; |
| 1134 |
case MATROSKA_TRACK_ENCODING_COMP_LZO:
|
| 1135 |
do {
|
| 1136 |
olen = pkt_size *= 3;
|
| 1137 |
pkt_data = av_realloc(pkt_data, |
| 1138 |
pkt_size+LZO_OUTPUT_PADDING); |
| 1139 |
result = lzo1x_decode(pkt_data, &olen, data, &isize); |
| 1140 |
} while (result==LZO_OUTPUT_FULL && pkt_size<10000000); |
| 1141 |
if (result)
|
| 1142 |
goto failed;
|
| 1143 |
pkt_size -= olen; |
| 1144 |
break;
|
| 1145 |
#ifdef CONFIG_ZLIB
|
| 1146 |
case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
|
| 1147 |
z_stream zstream = {0};
|
| 1148 |
if (inflateInit(&zstream) != Z_OK)
|
| 1149 |
return -1; |
| 1150 |
zstream.next_in = data; |
| 1151 |
zstream.avail_in = isize; |
| 1152 |
do {
|
| 1153 |
pkt_size *= 3;
|
| 1154 |
pkt_data = av_realloc(pkt_data, pkt_size); |
| 1155 |
zstream.avail_out = pkt_size - zstream.total_out; |
| 1156 |
zstream.next_out = pkt_data + zstream.total_out; |
| 1157 |
result = inflate(&zstream, Z_NO_FLUSH); |
| 1158 |
} while (result==Z_OK && pkt_size<10000000); |
| 1159 |
pkt_size = zstream.total_out; |
| 1160 |
inflateEnd(&zstream); |
| 1161 |
if (result != Z_STREAM_END)
|
| 1162 |
goto failed;
|
| 1163 |
break;
|
| 1164 |
} |
| 1165 |
#endif
|
| 1166 |
#ifdef CONFIG_BZLIB
|
| 1167 |
case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
|
| 1168 |
bz_stream bzstream = {0};
|
| 1169 |
if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) |
| 1170 |
return -1; |
| 1171 |
bzstream.next_in = data; |
| 1172 |
bzstream.avail_in = isize; |
| 1173 |
do {
|
| 1174 |
pkt_size *= 3;
|
| 1175 |
pkt_data = av_realloc(pkt_data, pkt_size); |
| 1176 |
bzstream.avail_out = pkt_size - bzstream.total_out_lo32; |
| 1177 |
bzstream.next_out = pkt_data + bzstream.total_out_lo32; |
| 1178 |
result = BZ2_bzDecompress(&bzstream); |
| 1179 |
} while (result==BZ_OK && pkt_size<10000000); |
| 1180 |
pkt_size = bzstream.total_out_lo32; |
| 1181 |
BZ2_bzDecompressEnd(&bzstream); |
| 1182 |
if (result != BZ_STREAM_END)
|
| 1183 |
goto failed;
|
| 1184 |
break;
|
| 1185 |
} |
| 1186 |
#endif
|
| 1187 |
} |
| 1188 |
|
| 1189 |
*buf = pkt_data; |
| 1190 |
*buf_size = pkt_size; |
| 1191 |
return 0; |
| 1192 |
failed:
|
| 1193 |
av_free(pkt_data); |
| 1194 |
return -1; |
| 1195 |
} |
| 1196 |
|
| 1197 |
static void |
| 1198 |
matroska_execute_seekhead(MatroskaDemuxContext *matroska) |
| 1199 |
{
|
| 1200 |
EbmlList *seekhead_list = &matroska->seekhead; |
| 1201 |
MatroskaSeekhead *seekhead = seekhead_list->elem; |
| 1202 |
uint32_t peek_id_cache = matroska->peek_id; |
| 1203 |
uint32_t level_up = matroska->level_up; |
| 1204 |
offset_t before_pos = url_ftell(matroska->ctx->pb); |
| 1205 |
MatroskaLevel level; |
| 1206 |
int i;
|
| 1207 |
|
| 1208 |
for (i=0; i<seekhead_list->nb_elem; i++) { |
| 1209 |
if (seekhead[i].pos <= before_pos
|
| 1210 |
|| seekhead[i].id == MATROSKA_ID_SEEKHEAD |
| 1211 |
|| seekhead[i].id == MATROSKA_ID_CLUSTER) |
| 1212 |
continue;
|
| 1213 |
|
| 1214 |
/* seek */
|
| 1215 |
if (ebml_read_seek(matroska,
|
| 1216 |
seekhead[i].pos+matroska->segment_start) < 0)
|
| 1217 |
continue;
|
| 1218 |
|
| 1219 |
/* we don't want to lose our seekhead level, so we add
|
| 1220 |
* a dummy. This is a crude hack. */
|
| 1221 |
if (matroska->num_levels == EBML_MAX_DEPTH) {
|
| 1222 |
av_log(matroska->ctx, AV_LOG_INFO, |
| 1223 |
"Max EBML element depth (%d) reached, "
|
| 1224 |
"cannot parse further.\n", EBML_MAX_DEPTH);
|
| 1225 |
break;
|
| 1226 |
} |
| 1227 |
|
| 1228 |
level.start = 0;
|
| 1229 |
level.length = (uint64_t)-1;
|
| 1230 |
matroska->levels[matroska->num_levels] = level; |
| 1231 |
matroska->num_levels++; |
| 1232 |
|
| 1233 |
ebml_parse_id(matroska, matroska_segment, seekhead[i].id, matroska); |
| 1234 |
|
| 1235 |
/* remove dummy level */
|
| 1236 |
while (matroska->num_levels) {
|
| 1237 |
uint64_t length = matroska->levels[--matroska->num_levels].length; |
| 1238 |
if (length == (uint64_t)-1) |
| 1239 |
break;
|
| 1240 |
} |
| 1241 |
} |
| 1242 |
|
| 1243 |
/* seek back */
|
| 1244 |
ebml_read_seek(matroska, before_pos); |
| 1245 |
matroska->peek_id = peek_id_cache; |
| 1246 |
matroska->level_up = level_up; |
| 1247 |
} |
| 1248 |
|
| 1249 |
static int |
| 1250 |
matroska_aac_profile (char *codec_id)
|
| 1251 |
{
|
| 1252 |
static const char *aac_profiles[] = { "MAIN", "LC", "SSR" }; |
| 1253 |
int profile;
|
| 1254 |
|
| 1255 |
for (profile=0; profile<ARRAY_SIZE(aac_profiles); profile++) |
| 1256 |
if (strstr(codec_id, aac_profiles[profile]))
|
| 1257 |
break;
|
| 1258 |
return profile + 1; |
| 1259 |
} |
| 1260 |
|
| 1261 |
static int |
| 1262 |
matroska_aac_sri (int samplerate)
|
| 1263 |
{
|
| 1264 |
int sri;
|
| 1265 |
|
| 1266 |
for (sri=0; sri<ARRAY_SIZE(ff_mpeg4audio_sample_rates); sri++) |
| 1267 |
if (ff_mpeg4audio_sample_rates[sri] == samplerate)
|
| 1268 |
break;
|
| 1269 |
return sri;
|
| 1270 |
} |
| 1271 |
|
| 1272 |
static int |
| 1273 |
matroska_read_header (AVFormatContext *s, |
| 1274 |
AVFormatParameters *ap) |
| 1275 |
{
|
| 1276 |
MatroskaDemuxContext *matroska = s->priv_data; |
| 1277 |
EbmlList *attachements_list = &matroska->attachments; |
| 1278 |
MatroskaAttachement *attachements; |
| 1279 |
EbmlList *chapters_list = &matroska->chapters; |
| 1280 |
MatroskaChapter *chapters; |
| 1281 |
MatroskaTrack *tracks; |
| 1282 |
EbmlList *index_list; |
| 1283 |
MatroskaIndex *index; |
| 1284 |
Ebml ebml = { 0 };
|
| 1285 |
AVStream *st; |
| 1286 |
int i, j;
|
| 1287 |
|
| 1288 |
matroska->ctx = s; |
| 1289 |
|
| 1290 |
/* First read the EBML header. */
|
| 1291 |
if (ebml_parse(matroska, ebml_syntax, &ebml, 0, 1) |
| 1292 |
|| ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
|
| 1293 |
|| ebml.id_length > sizeof(uint32_t) || strcmp(ebml.doctype, "matroska") |
| 1294 |
|| ebml.doctype_version > 2) {
|
| 1295 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 1296 |
"EBML header using unsupported features\n"
|
| 1297 |
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", |
| 1298 |
ebml.version, ebml.doctype, ebml.doctype_version); |
| 1299 |
return AVERROR_NOFMT;
|
| 1300 |
} |
| 1301 |
ebml_free(ebml_syntax, &ebml); |
| 1302 |
|
| 1303 |
/* The next thing is a segment. */
|
| 1304 |
if (ebml_parse(matroska, matroska_segments, matroska, 0, 1) < 0) |
| 1305 |
return -1; |
| 1306 |
matroska_execute_seekhead(matroska); |
| 1307 |
|
| 1308 |
if (matroska->duration)
|
| 1309 |
matroska->ctx->duration = matroska->duration * matroska->time_scale |
| 1310 |
* 1000 / AV_TIME_BASE;
|
| 1311 |
if (matroska->title)
|
| 1312 |
strncpy(matroska->ctx->title, matroska->title, |
| 1313 |
sizeof(matroska->ctx->title)-1); |
| 1314 |
|
| 1315 |
tracks = matroska->tracks.elem; |
| 1316 |
for (i=0; i < matroska->tracks.nb_elem; i++) { |
| 1317 |
MatroskaTrack *track = &tracks[i]; |
| 1318 |
enum CodecID codec_id = CODEC_ID_NONE;
|
| 1319 |
EbmlList *encodings_list = &tracks->encodings; |
| 1320 |
MatroskaTrackEncoding *encodings = encodings_list->elem; |
| 1321 |
uint8_t *extradata = NULL;
|
| 1322 |
int extradata_size = 0; |
| 1323 |
int extradata_offset = 0; |
| 1324 |
|
| 1325 |
/* Apply some sanity checks. */
|
| 1326 |
if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
|
| 1327 |
track->type != MATROSKA_TRACK_TYPE_AUDIO && |
| 1328 |
track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
|
| 1329 |
av_log(matroska->ctx, AV_LOG_INFO, |
| 1330 |
"Unknown or unsupported track type %"PRIu64"\n", |
| 1331 |
track->type); |
| 1332 |
continue;
|
| 1333 |
} |
| 1334 |
if (track->codec_id == NULL) |
| 1335 |
continue;
|
| 1336 |
|
| 1337 |
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
|
| 1338 |
if (!track->default_duration)
|
| 1339 |
track->default_duration = 1000000000/track->video.frame_rate;
|
| 1340 |
if (!track->video.display_width)
|
| 1341 |
track->video.display_width = track->video.pixel_width; |
| 1342 |
if (!track->video.display_height)
|
| 1343 |
track->video.display_height = track->video.pixel_height; |
| 1344 |
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { |
| 1345 |
if (!track->audio.out_samplerate)
|
| 1346 |
track->audio.out_samplerate = track->audio.samplerate; |
| 1347 |
} |
| 1348 |
if (encodings_list->nb_elem > 1) { |
| 1349 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 1350 |
"Multiple combined encodings no supported");
|
| 1351 |
} else if (encodings_list->nb_elem == 1) { |
| 1352 |
if (encodings[0].type || |
| 1353 |
(encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
|
| 1354 |
#ifdef CONFIG_ZLIB
|
| 1355 |
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
|
| 1356 |
#endif
|
| 1357 |
#ifdef CONFIG_BZLIB
|
| 1358 |
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
|
| 1359 |
#endif
|
| 1360 |
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
|
| 1361 |
encodings[0].scope = 0; |
| 1362 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 1363 |
"Unsupported encoding type");
|
| 1364 |
} else if (track->codec_priv.size && encodings[0].scope&2) { |
| 1365 |
uint8_t *codec_priv = track->codec_priv.data; |
| 1366 |
int offset = matroska_decode_buffer(&track->codec_priv.data,
|
| 1367 |
&track->codec_priv.size, |
| 1368 |
track); |
| 1369 |
if (offset < 0) { |
| 1370 |
track->codec_priv.data = NULL;
|
| 1371 |
track->codec_priv.size = 0;
|
| 1372 |
av_log(matroska->ctx, AV_LOG_ERROR, |
| 1373 |
"Failed to decode codec private data\n");
|
| 1374 |
} else if (offset > 0) { |
| 1375 |
track->codec_priv.data = av_malloc(track->codec_priv.size + offset); |
| 1376 |
memcpy(track->codec_priv.data, |
| 1377 |
encodings[0].compression.settings.data, offset);
|
| 1378 |
memcpy(track->codec_priv.data+offset, codec_priv, |
| 1379 |
track->codec_priv.size); |
| 1380 |
track->codec_priv.size += offset; |
| 1381 |
} |
| 1382 |
if (codec_priv != track->codec_priv.data)
|
| 1383 |
av_free(codec_priv); |
| 1384 |
} |
| 1385 |
} |
| 1386 |
|
| 1387 |
for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ |
| 1388 |
if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
|
| 1389 |
strlen(ff_mkv_codec_tags[j].str))){
|
| 1390 |
codec_id= ff_mkv_codec_tags[j].id; |
| 1391 |
break;
|
| 1392 |
} |
| 1393 |
} |
| 1394 |
|
| 1395 |
st = track->stream = av_new_stream(s, matroska->num_streams++); |
| 1396 |
if (st == NULL) |
| 1397 |
return AVERROR(ENOMEM);
|
| 1398 |
|
| 1399 |
if (!strcmp(track->codec_id, MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC)
|
| 1400 |
&& track->codec_priv.size >= 40
|
| 1401 |
&& track->codec_priv.data != NULL) {
|
| 1402 |
track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
|
| 1403 |
codec_id = codec_get_id(codec_bmp_tags, track->video.fourcc); |
| 1404 |
} else if (!strcmp(track->codec_id, MATROSKA_CODEC_ID_AUDIO_ACM) |
| 1405 |
&& track->codec_priv.size >= 18
|
| 1406 |
&& track->codec_priv.data != NULL) {
|
| 1407 |
uint16_t tag = AV_RL16(track->codec_priv.data); |
| 1408 |
codec_id = codec_get_id(codec_wav_tags, tag); |
| 1409 |
} else if (!strcmp(track->codec_id, "V_QUICKTIME") |
| 1410 |
&& (track->codec_priv.size >= 86)
|
| 1411 |
&& (track->codec_priv.data != NULL)) {
|
| 1412 |
track->video.fourcc = AV_RL32(track->codec_priv.data); |
| 1413 |
codec_id=codec_get_id(codec_movvideo_tags, track->video.fourcc); |
| 1414 |
} else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) { |
| 1415 |
int profile = matroska_aac_profile(track->codec_id);
|
| 1416 |
int sri = matroska_aac_sri(track->audio.samplerate);
|
| 1417 |
extradata = av_malloc(5);
|
| 1418 |
if (extradata == NULL) |
| 1419 |
return AVERROR(ENOMEM);
|
| 1420 |
extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); |
| 1421 |
extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3); |
| 1422 |
if (strstr(track->codec_id, "SBR")) { |
| 1423 |
sri = matroska_aac_sri(track->audio.out_samplerate); |
| 1424 |
extradata[2] = 0x56; |
| 1425 |
extradata[3] = 0xE5; |
| 1426 |
extradata[4] = 0x80 | (sri<<3); |
| 1427 |
extradata_size = 5;
|
| 1428 |
} else
|
| 1429 |
extradata_size = 2;
|
| 1430 |
} else if (codec_id == CODEC_ID_TTA) { |
| 1431 |
ByteIOContext b; |
| 1432 |
extradata_size = 30;
|
| 1433 |
extradata = av_mallocz(extradata_size); |
| 1434 |
if (extradata == NULL) |
| 1435 |
return AVERROR(ENOMEM);
|
| 1436 |
init_put_byte(&b, extradata, extradata_size, 1,
|
| 1437 |
NULL, NULL, NULL, NULL); |
| 1438 |
put_buffer(&b, "TTA1", 4); |
| 1439 |
put_le16(&b, 1);
|
| 1440 |
put_le16(&b, track->audio.channels); |
| 1441 |
put_le16(&b, track->audio.bitdepth); |
| 1442 |
put_le32(&b, track->audio.out_samplerate); |
| 1443 |
put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate); |
| 1444 |
} else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || |
| 1445 |
codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
|
| 1446 |
extradata_offset = 26;
|
| 1447 |
track->codec_priv.size -= extradata_offset; |
| 1448 |
} else if (codec_id == CODEC_ID_RA_144) { |
| 1449 |
track->audio.out_samplerate = 8000;
|
| 1450 |
track->audio.channels = 1;
|
| 1451 |
} else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || |
| 1452 |
codec_id == CODEC_ID_ATRAC3) {
|
| 1453 |
ByteIOContext b; |
| 1454 |
|
| 1455 |
init_put_byte(&b, track->codec_priv.data,track->codec_priv.size, |
| 1456 |
0, NULL, NULL, NULL, NULL); |
| 1457 |
url_fskip(&b, 24);
|
| 1458 |
track->audio.coded_framesize = get_be32(&b); |
| 1459 |
url_fskip(&b, 12);
|
| 1460 |
track->audio.sub_packet_h = get_be16(&b); |
| 1461 |
track->audio.frame_size = get_be16(&b); |
| 1462 |
track->audio.sub_packet_size = get_be16(&b); |
| 1463 |
track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h); |
| 1464 |
if (codec_id == CODEC_ID_RA_288) {
|
| 1465 |
st->codec->block_align = track->audio.coded_framesize; |
| 1466 |
track->codec_priv.size = 0;
|
| 1467 |
} else {
|
| 1468 |
st->codec->block_align = track->audio.sub_packet_size; |
| 1469 |
extradata_offset = 78;
|
| 1470 |
track->codec_priv.size -= extradata_offset; |
| 1471 |
} |
| 1472 |
} |
| 1473 |
|
| 1474 |
if (codec_id == CODEC_ID_NONE)
|
| 1475 |
av_log(matroska->ctx, AV_LOG_INFO, |
| 1476 |
"Unknown/unsupported CodecID %s.\n", track->codec_id);
|
| 1477 |
|
| 1478 |
av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ |
| 1479 |
|
| 1480 |
st->codec->codec_id = codec_id; |
| 1481 |
st->start_time = 0;
|
| 1482 |
if (strcmp(track->language, "und")) |
| 1483 |
av_strlcpy(st->language, track->language, 4);
|
| 1484 |
|
| 1485 |
if (track->flag_default)
|
| 1486 |
st->disposition |= AV_DISPOSITION_DEFAULT; |
| 1487 |
|
| 1488 |
if (track->default_duration)
|
| 1489 |
av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, |
| 1490 |
track->default_duration, 1000000000, 30000); |
| 1491 |
|
| 1492 |
if(extradata){
|
| 1493 |
st->codec->extradata = extradata; |
| 1494 |
st->codec->extradata_size = extradata_size; |
| 1495 |
} else if(track->codec_priv.data && track->codec_priv.size > 0){ |
| 1496 |
st->codec->extradata = av_malloc(track->codec_priv.size); |
| 1497 |
if(st->codec->extradata == NULL) |
| 1498 |
return AVERROR(ENOMEM);
|
| 1499 |
st->codec->extradata_size = track->codec_priv.size; |
| 1500 |
memcpy(st->codec->extradata, |
| 1501 |
track->codec_priv.data + extradata_offset, |
| 1502 |
track->codec_priv.size); |
| 1503 |
} |
| 1504 |
|
| 1505 |
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
|
| 1506 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
| 1507 |
st->codec->codec_tag = track->video.fourcc; |
| 1508 |
st->codec->width = track->video.pixel_width; |
| 1509 |
st->codec->height = track->video.pixel_height; |
| 1510 |
av_reduce(&st->codec->sample_aspect_ratio.num, |
| 1511 |
&st->codec->sample_aspect_ratio.den, |
| 1512 |
st->codec->height * track->video.display_width, |
| 1513 |
st->codec-> width * track->video.display_height, |
| 1514 |
255);
|
| 1515 |
st->need_parsing = AVSTREAM_PARSE_HEADERS; |
| 1516 |
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { |
| 1517 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
| 1518 |
st->codec->sample_rate = track->audio.out_samplerate; |
| 1519 |
st->codec->channels = track->audio.channels; |
| 1520 |
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { |
| 1521 |
st->codec->codec_type = CODEC_TYPE_SUBTITLE; |
| 1522 |
} |
| 1523 |
} |
| 1524 |
|
| 1525 |
attachements = attachements_list->elem; |
| 1526 |
for (j=0; j<attachements_list->nb_elem; j++) { |
| 1527 |
if (!(attachements[j].filename && attachements[j].mime &&
|
| 1528 |
attachements[j].bin.data && attachements[j].bin.size > 0)) {
|
| 1529 |
av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
|
| 1530 |
} else {
|
| 1531 |
AVStream *st = av_new_stream(s, matroska->num_streams++); |
| 1532 |
if (st == NULL) |
| 1533 |
break;
|
| 1534 |
st->filename = av_strdup(attachements[j].filename); |
| 1535 |
st->codec->codec_id = CODEC_ID_NONE; |
| 1536 |
st->codec->codec_type = CODEC_TYPE_ATTACHMENT; |
| 1537 |
st->codec->extradata = av_malloc(attachements[j].bin.size); |
| 1538 |
if(st->codec->extradata == NULL) |
| 1539 |
break;
|
| 1540 |
st->codec->extradata_size = attachements[j].bin.size; |
| 1541 |
memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size); |
| 1542 |
|
| 1543 |
for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { |
| 1544 |
if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
|
| 1545 |
strlen(ff_mkv_mime_tags[i].str))) {
|
| 1546 |
st->codec->codec_id = ff_mkv_mime_tags[i].id; |
| 1547 |
break;
|
| 1548 |
} |
| 1549 |
} |
| 1550 |
} |
| 1551 |
} |
| 1552 |
|
| 1553 |
chapters = chapters_list->elem; |
| 1554 |
for (i=0; i<chapters_list->nb_elem; i++) |
| 1555 |
if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid)
|
| 1556 |
ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
|
| 1557 |
chapters[i].start, chapters[i].end, |
| 1558 |
chapters[i].title); |
| 1559 |
|
| 1560 |
index_list = &matroska->index; |
| 1561 |
index = index_list->elem; |
| 1562 |
for (i=0; i<index_list->nb_elem; i++) { |
| 1563 |
EbmlList *pos_list = &index[i].pos; |
| 1564 |
MatroskaIndexPos *pos = pos_list->elem; |
| 1565 |
for (j=0; j<pos_list->nb_elem; j++) { |
| 1566 |
MatroskaTrack *track = matroska_find_track_by_num(matroska, |
| 1567 |
pos[j].track); |
| 1568 |
if (track && track->stream)
|
| 1569 |
av_add_index_entry(track->stream, |
| 1570 |
pos[j].pos + matroska->segment_start, |
| 1571 |
index[i].time*matroska->time_scale/AV_TIME_BASE, |
| 1572 |
0, 0, AVINDEX_KEYFRAME); |
| 1573 |
} |
| 1574 |
} |
| 1575 |
|
| 1576 |
return 0; |
| 1577 |
} |
| 1578 |
|
| 1579 |
static int |
| 1580 |
matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size,
|
| 1581 |
int64_t pos, uint64_t cluster_time, uint64_t duration, |
| 1582 |
int is_keyframe)
|
| 1583 |
{
|
| 1584 |
MatroskaTrack *track; |
| 1585 |
int res = 0; |
| 1586 |
AVStream *st; |
| 1587 |
AVPacket *pkt; |
| 1588 |
int16_t block_time; |
| 1589 |
uint32_t *lace_size = NULL;
|
| 1590 |
int n, flags, laces = 0; |
| 1591 |
uint64_t num; |
| 1592 |
|
| 1593 |
if ((n = matroska_ebmlnum_uint(data, size, &num)) < 0) { |
| 1594 |
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
|
| 1595 |
return res;
|
| 1596 |
} |
| 1597 |
data += n; |
| 1598 |
size -= n; |
| 1599 |
|
| 1600 |
track = matroska_find_track_by_num(matroska, num); |
| 1601 |
if (size <= 3 || !track || !track->stream) { |
| 1602 |
av_log(matroska->ctx, AV_LOG_INFO, |
| 1603 |
"Invalid stream %"PRIu64" or size %u\n", num, size); |
| 1604 |
return res;
|
| 1605 |
} |
| 1606 |
st = track->stream; |
| 1607 |
if (st->discard >= AVDISCARD_ALL)
|
| 1608 |
return res;
|
| 1609 |
if (duration == AV_NOPTS_VALUE)
|
| 1610 |
duration = track->default_duration / matroska->time_scale; |
| 1611 |
|
| 1612 |
block_time = AV_RB16(data); |
| 1613 |
data += 2;
|
| 1614 |
flags = *data++; |
| 1615 |
size -= 3;
|
| 1616 |
if (is_keyframe == -1) |
| 1617 |
is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0; |
| 1618 |
|
| 1619 |
if (matroska->skip_to_keyframe) {
|
| 1620 |
if (!is_keyframe || st != matroska->skip_to_stream)
|
| 1621 |
return res;
|
| 1622 |
matroska->skip_to_keyframe = 0;
|
| 1623 |
} |
| 1624 |
|
| 1625 |
switch ((flags & 0x06) >> 1) { |
| 1626 |
case 0x0: /* no lacing */ |
| 1627 |
laces = 1;
|
| 1628 |
lace_size = av_mallocz(sizeof(int)); |
| 1629 |
lace_size[0] = size;
|
| 1630 |
break;
|
| 1631 |
|
| 1632 |
case 0x1: /* xiph lacing */ |
| 1633 |
case 0x2: /* fixed-size lacing */ |
| 1634 |
case 0x3: /* EBML lacing */ |
| 1635 |
assert(size>0); // size <=3 is checked before size-=3 above |
| 1636 |
laces = (*data) + 1;
|
| 1637 |
data += 1;
|
| 1638 |
size -= 1;
|
| 1639 |
lace_size = av_mallocz(laces * sizeof(int)); |
| 1640 |
|
| 1641 |
switch ((flags & 0x06) >> 1) { |
| 1642 |
case 0x1: /* xiph lacing */ { |
| 1643 |
uint8_t temp; |
| 1644 |
uint32_t total = 0;
|
| 1645 |
for (n = 0; res == 0 && n < laces - 1; n++) { |
| 1646 |
while (1) { |
| 1647 |
if (size == 0) { |
| 1648 |
res = -1;
|
| 1649 |
break;
|
| 1650 |
} |
| 1651 |
temp = *data; |
| 1652 |
lace_size[n] += temp; |
| 1653 |
data += 1;
|
| 1654 |
size -= 1;
|
| 1655 |
if (temp != 0xff) |
| 1656 |
break;
|
| 1657 |
} |
| 1658 |
total += lace_size[n]; |
| 1659 |
} |
| 1660 |
lace_size[n] = size - total; |
| 1661 |
break;
|
| 1662 |
} |
| 1663 |
|
| 1664 |
case 0x2: /* fixed-size lacing */ |
| 1665 |
for (n = 0; n < laces; n++) |
| 1666 |
lace_size[n] = size / laces; |
| 1667 |
break;
|
| 1668 |
|
| 1669 |
case 0x3: /* EBML lacing */ { |
| 1670 |
uint32_t total; |
| 1671 |
n = matroska_ebmlnum_uint(data, size, &num); |
| 1672 |
if (n < 0) { |
| 1673 |
av_log(matroska->ctx, AV_LOG_INFO, |
| 1674 |
"EBML block data error\n");
|
| 1675 |
break;
|
| 1676 |
} |
| 1677 |
data += n; |
| 1678 |
size -= n; |
| 1679 |
total = lace_size[0] = num;
|
| 1680 |
for (n = 1; res == 0 && n < laces - 1; n++) { |
| 1681 |
int64_t snum; |
| 1682 |
int r;
|
| 1683 |
r = matroska_ebmlnum_sint (data, size, &snum); |
| 1684 |
if (r < 0) { |
| 1685 |
av_log(matroska->ctx, AV_LOG_INFO, |
| 1686 |
"EBML block data error\n");
|
| 1687 |
break;
|
| 1688 |
} |
| 1689 |
data += r; |
| 1690 |
size -= r; |
| 1691 |
lace_size[n] = lace_size[n - 1] + snum;
|
| 1692 |
total += lace_size[n]; |
| 1693 |
} |
| 1694 |
lace_size[n] = size - total; |
| 1695 |
break;
|
| 1696 |
} |
| 1697 |
} |
| 1698 |
break;
|
| 1699 |
} |
| 1700 |
|
| 1701 |
if (res == 0) { |
| 1702 |
uint64_t timecode = AV_NOPTS_VALUE; |
| 1703 |
|
| 1704 |
if (cluster_time != (uint64_t)-1 |
| 1705 |
&& (block_time >= 0 || cluster_time >= -block_time))
|
| 1706 |
timecode = cluster_time + block_time; |
| 1707 |
|
| 1708 |
for (n = 0; n < laces; n++) { |
| 1709 |
if (st->codec->codec_id == CODEC_ID_RA_288 ||
|
| 1710 |
st->codec->codec_id == CODEC_ID_COOK || |
| 1711 |
st->codec->codec_id == CODEC_ID_ATRAC3) {
|
| 1712 |
int a = st->codec->block_align;
|
| 1713 |
int sps = track->audio.sub_packet_size;
|
| 1714 |
int cfs = track->audio.coded_framesize;
|
| 1715 |
int h = track->audio.sub_packet_h;
|
| 1716 |
int y = track->audio.sub_packet_cnt;
|
| 1717 |
int w = track->audio.frame_size;
|
| 1718 |
int x;
|
| 1719 |
|
| 1720 |
if (!track->audio.pkt_cnt) {
|
| 1721 |
if (st->codec->codec_id == CODEC_ID_RA_288)
|
| 1722 |
for (x=0; x<h/2; x++) |
| 1723 |
memcpy(track->audio.buf+x*2*w+y*cfs,
|
| 1724 |
data+x*cfs, cfs); |
| 1725 |
else
|
| 1726 |
for (x=0; x<w/sps; x++) |
| 1727 |
memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); |
| 1728 |
|
| 1729 |
if (++track->audio.sub_packet_cnt >= h) {
|
| 1730 |
track->audio.sub_packet_cnt = 0;
|
| 1731 |
track->audio.pkt_cnt = h*w / a; |
| 1732 |
} |
| 1733 |
} |
| 1734 |
while (track->audio.pkt_cnt) {
|
| 1735 |
pkt = av_mallocz(sizeof(AVPacket));
|
| 1736 |
av_new_packet(pkt, a); |
| 1737 |
memcpy(pkt->data, track->audio.buf |
| 1738 |
+ a * (h*w / a - track->audio.pkt_cnt--), a); |
| 1739 |
pkt->pos = pos; |
| 1740 |
pkt->stream_index = st->index; |
| 1741 |
matroska_queue_packet(matroska, pkt); |
| 1742 |
} |
| 1743 |
} else {
|
| 1744 |
MatroskaTrackEncoding *encodings = track->encodings.elem; |
| 1745 |
int offset = 0, pkt_size = lace_size[n]; |
| 1746 |
uint8_t *pkt_data = data; |
| 1747 |
|
| 1748 |
if (encodings && encodings->scope & 1) { |
| 1749 |
offset = matroska_decode_buffer(&pkt_data,&pkt_size, track); |
| 1750 |
if (offset < 0) |
| 1751 |
continue;
|
| 1752 |
} |
| 1753 |
|
| 1754 |
pkt = av_mallocz(sizeof(AVPacket));
|
| 1755 |
/* XXX: prevent data copy... */
|
| 1756 |
if (av_new_packet(pkt, pkt_size+offset) < 0) { |
| 1757 |
av_free(pkt); |
| 1758 |
res = AVERROR(ENOMEM); |
| 1759 |
n = laces-1;
|
| 1760 |
break;
|
| 1761 |
} |
| 1762 |
if (offset)
|
| 1763 |
memcpy (pkt->data, encodings->compression.settings.data, offset); |
| 1764 |
memcpy (pkt->data+offset, pkt_data, pkt_size); |
| 1765 |
|
| 1766 |
if (pkt_data != data)
|
| 1767 |
av_free(pkt_data); |
| 1768 |
|
| 1769 |
if (n == 0) |
| 1770 |
pkt->flags = is_keyframe; |
| 1771 |
pkt->stream_index = st->index; |
| 1772 |
|
| 1773 |
pkt->pts = timecode; |
| 1774 |
pkt->pos = pos; |
| 1775 |
pkt->duration = duration; |
| 1776 |
|
| 1777 |
matroska_queue_packet(matroska, pkt); |
| 1778 |
} |
| 1779 |
|
| 1780 |
if (timecode != AV_NOPTS_VALUE)
|
| 1781 |
timecode = duration ? timecode + duration : AV_NOPTS_VALUE; |
| 1782 |
data += lace_size[n]; |
| 1783 |
} |
| 1784 |
} |
| 1785 |
|
| 1786 |
av_free(lace_size); |
| 1787 |
return res;
|
| 1788 |
} |
| 1789 |
|
| 1790 |
static int |
| 1791 |
matroska_parse_cluster (MatroskaDemuxContext *matroska) |
| 1792 |
{
|
| 1793 |
MatroskaCluster cluster = { 0 };
|
| 1794 |
EbmlList *blocks_list; |
| 1795 |
MatroskaBlock *blocks; |
| 1796 |
int i, res = ebml_parse(matroska, matroska_clusters, &cluster, 0, 1); |
| 1797 |
blocks_list = &cluster.blocks; |
| 1798 |
blocks = blocks_list->elem; |
| 1799 |
for (i=0; !res && i<blocks_list->nb_elem; i++) |
| 1800 |
if (blocks[i].bin.size > 0) |
| 1801 |
res=matroska_parse_block(matroska, |
| 1802 |
blocks[i].bin.data, blocks[i].bin.size, |
| 1803 |
blocks[i].bin.pos, cluster.timecode, |
| 1804 |
blocks[i].duration, !blocks[i].reference); |
| 1805 |
ebml_free(matroska_cluster, &cluster); |
| 1806 |
return res;
|
| 1807 |
} |
| 1808 |
|
| 1809 |
static int |
| 1810 |
matroska_read_packet (AVFormatContext *s, |
| 1811 |
AVPacket *pkt) |
| 1812 |
{
|
| 1813 |
MatroskaDemuxContext *matroska = s->priv_data; |
| 1814 |
|
| 1815 |
while (matroska_deliver_packet(matroska, pkt)) {
|
| 1816 |
if (matroska->done)
|
| 1817 |
return AVERROR(EIO);
|
| 1818 |
if (matroska_parse_cluster(matroska) < 0) |
| 1819 |
matroska->done = 1;
|
| 1820 |
} |
| 1821 |
|
| 1822 |
return 0; |
| 1823 |
} |
| 1824 |
|
| 1825 |
static int |
| 1826 |
matroska_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp,
|
| 1827 |
int flags)
|
| 1828 |
{
|
| 1829 |
MatroskaDemuxContext *matroska = s->priv_data; |
| 1830 |
AVStream *st = s->streams[stream_index]; |
| 1831 |
int index;
|
| 1832 |
|
| 1833 |
index = av_index_search_timestamp(st, timestamp, flags); |
| 1834 |
if (index < 0) |
| 1835 |
return 0; |
| 1836 |
|
| 1837 |
matroska_clear_queue(matroska); |
| 1838 |
|
| 1839 |
url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET); |
| 1840 |
matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); |
| 1841 |
matroska->skip_to_stream = st; |
| 1842 |
matroska->peek_id = 0;
|
| 1843 |
av_update_cur_dts(s, st, st->index_entries[index].timestamp); |
| 1844 |
return 0; |
| 1845 |
} |
| 1846 |
|
| 1847 |
static int |
| 1848 |
matroska_read_close (AVFormatContext *s) |
| 1849 |
{
|
| 1850 |
MatroskaDemuxContext *matroska = s->priv_data; |
| 1851 |
MatroskaTrack *tracks = matroska->tracks.elem; |
| 1852 |
int n;
|
| 1853 |
|
| 1854 |
matroska_clear_queue(matroska); |
| 1855 |
|
| 1856 |
for (n=0; n < matroska->tracks.nb_elem; n++) |
| 1857 |
if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
|
| 1858 |
av_free(tracks[n].audio.buf); |
| 1859 |
ebml_free(matroska_segment, matroska); |
| 1860 |
|
| 1861 |
return 0; |
| 1862 |
} |
| 1863 |
|
| 1864 |
AVInputFormat matroska_demuxer = {
|
| 1865 |
"matroska",
|
| 1866 |
NULL_IF_CONFIG_SMALL("Matroska file format"),
|
| 1867 |
sizeof(MatroskaDemuxContext),
|
| 1868 |
matroska_probe, |
| 1869 |
matroska_read_header, |
| 1870 |
matroska_read_packet, |
| 1871 |
matroska_read_close, |
| 1872 |
matroska_read_seek, |
| 1873 |
}; |