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3080 lines
107 KiB
3080 lines
107 KiB
/* |
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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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/** |
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* @file |
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* Matroska file demuxer |
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* @author Ronald Bultje <rbultje@ronald.bitfreak.net> |
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* @author with a little help from Moritz Bunkus <moritz@bunkus.org> |
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* @author totally reworked by Aurelien Jacobs <aurel@gnuage.org> |
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* @see specs available on the Matroska project page: http://www.matroska.org/ |
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*/ |
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|
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#include "config.h" |
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|
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#include <inttypes.h> |
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#include <stdio.h> |
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#if CONFIG_BZLIB |
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#include <bzlib.h> |
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#endif |
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#if CONFIG_ZLIB |
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#include <zlib.h> |
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#endif |
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|
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#include "libavutil/avstring.h" |
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#include "libavutil/base64.h" |
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#include "libavutil/dict.h" |
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#include "libavutil/intfloat.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/lzo.h" |
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#include "libavutil/mathematics.h" |
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|
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#include "libavcodec/bytestream.h" |
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#include "libavcodec/flac.h" |
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#include "libavcodec/mpeg4audio.h" |
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|
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "internal.h" |
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#include "isom.h" |
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#include "matroska.h" |
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#include "oggdec.h" |
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/* For ff_codec_get_id(). */ |
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#include "riff.h" |
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#include "rmsipr.h" |
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|
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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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EBML_SINT, |
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EBML_TYPE_COUNT |
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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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|
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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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|
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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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|
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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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|
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typedef struct { |
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uint64_t algo; |
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EbmlBin key_id; |
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} MatroskaTrackEncryption; |
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|
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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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MatroskaTrackEncryption encryption; |
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} MatroskaTrackEncoding; |
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|
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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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EbmlBin color_space; |
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uint64_t stereo_mode; |
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uint64_t alpha_mode; |
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} MatroskaTrackVideo; |
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|
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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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|
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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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uint64_t buf_timecode; |
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uint8_t *buf; |
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} MatroskaTrackAudio; |
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typedef struct { |
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uint64_t uid; |
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uint64_t type; |
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} MatroskaTrackPlane; |
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typedef struct { |
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EbmlList combine_planes; |
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} MatroskaTrackOperation; |
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typedef struct { |
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uint64_t num; |
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uint64_t uid; |
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uint64_t type; |
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char *name; |
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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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uint64_t flag_forced; |
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uint64_t seek_preroll; |
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MatroskaTrackVideo video; |
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MatroskaTrackAudio audio; |
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MatroskaTrackOperation operation; |
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EbmlList encodings; |
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uint64_t codec_delay; |
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|
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AVStream *stream; |
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int64_t end_timecode; |
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int ms_compat; |
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uint64_t max_block_additional_id; |
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} MatroskaTrack; |
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|
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typedef struct { |
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uint64_t uid; |
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char *filename; |
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char *mime; |
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EbmlBin bin; |
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AVStream *stream; |
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} MatroskaAttachment; |
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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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|
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AVChapter *chapter; |
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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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char *name; |
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char *string; |
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char *lang; |
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uint64_t def; |
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EbmlList sub; |
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} MatroskaTag; |
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typedef struct { |
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char *type; |
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uint64_t typevalue; |
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uint64_t trackuid; |
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uint64_t chapteruid; |
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uint64_t attachuid; |
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} MatroskaTagTarget; |
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typedef struct { |
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MatroskaTagTarget target; |
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EbmlList tag; |
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} MatroskaTags; |
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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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uint64_t timecode; |
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EbmlList blocks; |
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} MatroskaCluster; |
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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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uint32_t current_id; |
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uint64_t time_scale; |
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double duration; |
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char *title; |
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char *muxingapp; |
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EbmlBin date_utc; |
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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 tags; |
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EbmlList seekhead; |
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/* byte position of the segment inside the stream */ |
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int64_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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AVPacket *prev_pkt; |
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int done; |
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/* What to skip before effectively reading a packet. */ |
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int skip_to_keyframe; |
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uint64_t skip_to_timecode; |
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/* File has a CUES element, but we defer parsing until it is needed. */ |
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int cues_parsing_deferred; |
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int current_cluster_num_blocks; |
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int64_t current_cluster_pos; |
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MatroskaCluster current_cluster; |
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/* File has SSA subtitles which prevent incremental cluster parsing. */ |
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int contains_ssa; |
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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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uint64_t non_simple; |
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EbmlBin bin; |
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uint64_t additional_id; |
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EbmlBin additional; |
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int64_t discard_padding; |
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} MatroskaBlock; |
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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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{ 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_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) }, |
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{ MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) }, |
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{ MATROSKA_ID_SEGMENTUID, 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), { .u=-1 } }, |
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{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } }, |
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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_BIN, 0, offsetof(MatroskaTrackVideo, color_space) }, |
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{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode) }, |
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{ MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) }, |
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{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE }, |
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{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE }, |
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{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE }, |
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{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE }, |
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{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE }, |
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{ MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_NONE }, |
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{ MATROSKA_ID_VIDEOASPECTRATIO, 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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{ 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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{ 0 } |
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}; |
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static EbmlSyntax matroska_track_encoding_encryption[] = { |
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{ MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} }, |
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{ MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) }, |
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{ MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE }, |
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{ MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE }, |
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{ MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE }, |
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{ MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE }, |
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{ MATROSKA_ID_ENCODINGSIGNATURE, 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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{ MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } }, |
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{ MATROSKA_ID_ENCODINGORDER, 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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{ 0 } |
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}; |
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static EbmlSyntax matroska_track_plane[] = { |
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{ MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) }, |
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{ MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) }, |
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{ 0 } |
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}; |
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|
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static EbmlSyntax matroska_track_combine_planes[] = { |
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{ MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} }, |
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{ 0 } |
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}; |
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static EbmlSyntax matroska_track_operation[] = { |
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{ MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} }, |
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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_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) }, |
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{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) }, |
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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_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) }, |
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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_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } }, |
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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_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } }, |
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{ MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } }, |
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{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) }, |
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{ MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) }, |
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{ MATROSKA_ID_TRACKFLAGENABLED, 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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{ 0 } |
|
}; |
|
|
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static EbmlSyntax matroska_tracks[] = { |
|
{ MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } }, |
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{ 0 } |
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}; |
|
|
|
static EbmlSyntax matroska_attachment[] = { |
|
{ MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) }, |
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{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) }, |
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{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) }, |
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{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) }, |
|
{ MATROSKA_ID_FILEDESC, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_attachments[] = { |
|
{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_chapter_display[] = { |
|
{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) }, |
|
{ MATROSKA_ID_CHAPLANG, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_chapter_entry[] = { |
|
{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } }, |
|
{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } }, |
|
{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) }, |
|
{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } }, |
|
{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE }, |
|
{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE }, |
|
{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE }, |
|
{ MATROSKA_ID_CHAPTERATOM, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_chapter[] = { |
|
{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } }, |
|
{ MATROSKA_ID_EDITIONUID, EBML_NONE }, |
|
{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE }, |
|
{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE }, |
|
{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_chapters[] = { |
|
{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_index_pos[] = { |
|
{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) }, |
|
{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) }, |
|
{ MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE }, |
|
{ MATROSKA_ID_CUEDURATION, EBML_NONE }, |
|
{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_index_entry[] = { |
|
{ MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) }, |
|
{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_index[] = { |
|
{ MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_simpletag[] = { |
|
{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) }, |
|
{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) }, |
|
{ MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } }, |
|
{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) }, |
|
{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) }, |
|
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_tagtargets[] = { |
|
{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) }, |
|
{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } }, |
|
{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) }, |
|
{ MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) }, |
|
{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_tag[] = { |
|
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } }, |
|
{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_tags[] = { |
|
{ MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_seekhead_entry[] = { |
|
{ MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) }, |
|
{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_seekhead[] = { |
|
{ MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_segment[] = { |
|
{ MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } }, |
|
{ MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } }, |
|
{ MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } }, |
|
{ MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } }, |
|
{ MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } }, |
|
{ MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } }, |
|
{ MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } }, |
|
{ MATROSKA_ID_CLUSTER, EBML_STOP }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_segments[] = { |
|
{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_blockmore[] = { |
|
{ MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) }, |
|
{ MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_blockadditions[] = { |
|
{ MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_blockgroup[] = { |
|
{ MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) }, |
|
{ MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} }, |
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) }, |
|
{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) }, |
|
{ MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) }, |
|
{ MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) }, |
|
{ MATROSKA_ID_CODECSTATE, EBML_NONE }, |
|
{ 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_cluster[] = { |
|
{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) }, |
|
{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } }, |
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } }, |
|
{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE }, |
|
{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_clusters[] = { |
|
{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } }, |
|
{ MATROSKA_ID_INFO, EBML_NONE }, |
|
{ MATROSKA_ID_CUES, EBML_NONE }, |
|
{ MATROSKA_ID_TAGS, EBML_NONE }, |
|
{ MATROSKA_ID_SEEKHEAD, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_cluster_incremental_parsing[] = { |
|
{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) }, |
|
{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } }, |
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } }, |
|
{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE }, |
|
{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE }, |
|
{ MATROSKA_ID_INFO, EBML_NONE }, |
|
{ MATROSKA_ID_CUES, EBML_NONE }, |
|
{ MATROSKA_ID_TAGS, EBML_NONE }, |
|
{ MATROSKA_ID_SEEKHEAD, EBML_NONE }, |
|
{ MATROSKA_ID_CLUSTER, EBML_STOP }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_cluster_incremental[] = { |
|
{ MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) }, |
|
{ MATROSKA_ID_BLOCKGROUP, EBML_STOP }, |
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_STOP }, |
|
{ MATROSKA_ID_CLUSTERPOSITION, EBML_NONE }, |
|
{ MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static EbmlSyntax matroska_clusters_incremental[] = { |
|
{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } }, |
|
{ MATROSKA_ID_INFO, EBML_NONE }, |
|
{ MATROSKA_ID_CUES, EBML_NONE }, |
|
{ MATROSKA_ID_TAGS, EBML_NONE }, |
|
{ MATROSKA_ID_SEEKHEAD, EBML_NONE }, |
|
{ 0 } |
|
}; |
|
|
|
static const char *const matroska_doctypes[] = { "matroska", "webm" }; |
|
|
|
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos) |
|
{ |
|
AVIOContext *pb = matroska->ctx->pb; |
|
uint32_t id; |
|
matroska->current_id = 0; |
|
matroska->num_levels = 0; |
|
|
|
/* seek to next position to resync from */ |
|
if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0) |
|
goto eof; |
|
|
|
id = avio_rb32(pb); |
|
|
|
// try to find a toplevel element |
|
while (!url_feof(pb)) { |
|
if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS || |
|
id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS || |
|
id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS || |
|
id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) { |
|
matroska->current_id = id; |
|
return 0; |
|
} |
|
id = (id << 8) | avio_r8(pb); |
|
} |
|
|
|
eof: |
|
matroska->done = 1; |
|
return AVERROR_EOF; |
|
} |
|
|
|
/* |
|
* Return: Whether we reached the end of a level in the hierarchy or not. |
|
*/ |
|
static int ebml_level_end(MatroskaDemuxContext *matroska) |
|
{ |
|
AVIOContext *pb = matroska->ctx->pb; |
|
int64_t pos = avio_tell(pb); |
|
|
|
if (matroska->num_levels > 0) { |
|
MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1]; |
|
if (pos - level->start >= level->length || matroska->current_id) { |
|
matroska->num_levels--; |
|
return 1; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* Read: an "EBML number", which is defined as a variable-length |
|
* array of bytes. The first byte indicates the length by giving a |
|
* number of 0-bits followed by a one. The position of the first |
|
* "one" bit inside the first byte indicates the length of this |
|
* number. |
|
* Returns: number of bytes read, < 0 on error |
|
*/ |
|
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, |
|
int max_size, uint64_t *number) |
|
{ |
|
int read = 1, n = 1; |
|
uint64_t total = 0; |
|
|
|
/* The first byte tells us the length in bytes - avio_r8() can normally |
|
* return 0, but since that's not a valid first ebmlID byte, we can |
|
* use it safely here to catch EOS. */ |
|
if (!(total = avio_r8(pb))) { |
|
/* we might encounter EOS here */ |
|
if (!url_feof(pb)) { |
|
int64_t pos = avio_tell(pb); |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", |
|
pos, pos); |
|
return pb->error ? pb->error : AVERROR(EIO); |
|
} |
|
return AVERROR_EOF; |
|
} |
|
|
|
/* get the length of the EBML number */ |
|
read = 8 - ff_log2_tab[total]; |
|
if (read > max_size) { |
|
int64_t pos = avio_tell(pb) - 1; |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", |
|
(uint8_t) total, pos, pos); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
/* read out length */ |
|
total ^= 1 << ff_log2_tab[total]; |
|
while (n++ < read) |
|
total = (total << 8) | avio_r8(pb); |
|
|
|
*number = total; |
|
|
|
return read; |
|
} |
|
|
|
/** |
|
* Read a EBML length value. |
|
* This needs special handling for the "unknown length" case which has multiple |
|
* encodings. |
|
*/ |
|
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, |
|
uint64_t *number) |
|
{ |
|
int res = ebml_read_num(matroska, pb, 8, number); |
|
if (res > 0 && *number + 1 == 1ULL << (7 * res)) |
|
*number = 0xffffffffffffffULL; |
|
return res; |
|
} |
|
|
|
/* |
|
* Read the next element as an unsigned int. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num) |
|
{ |
|
int n = 0; |
|
|
|
if (size > 8) |
|
return AVERROR_INVALIDDATA; |
|
|
|
/* big-endian ordering; build up number */ |
|
*num = 0; |
|
while (n++ < size) |
|
*num = (*num << 8) | avio_r8(pb); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as a signed int. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num) |
|
{ |
|
int n = 1; |
|
|
|
if (size > 8) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if (size == 0) { |
|
*num = 0; |
|
} else { |
|
*num = sign_extend(avio_r8(pb), 8); |
|
|
|
/* big-endian ordering; build up number */ |
|
while (n++ < size) |
|
*num = (*num << 8) | avio_r8(pb); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as a float. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
static int ebml_read_float(AVIOContext *pb, int size, double *num) |
|
{ |
|
if (size == 0) |
|
*num = 0; |
|
else if (size == 4) |
|
*num = av_int2float(avio_rb32(pb)); |
|
else if (size == 8) |
|
*num = av_int2double(avio_rb64(pb)); |
|
else |
|
return AVERROR_INVALIDDATA; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as an ASCII string. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
static int ebml_read_ascii(AVIOContext *pb, int size, char **str) |
|
{ |
|
char *res; |
|
|
|
/* EBML strings are usually not 0-terminated, so we allocate one |
|
* byte more, read the string and NULL-terminate it ourselves. */ |
|
if (!(res = av_malloc(size + 1))) |
|
return AVERROR(ENOMEM); |
|
if (avio_read(pb, (uint8_t *) res, size) != size) { |
|
av_free(res); |
|
return AVERROR(EIO); |
|
} |
|
(res)[size] = '\0'; |
|
av_free(*str); |
|
*str = res; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as binary data. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin) |
|
{ |
|
av_fast_padded_malloc(&bin->data, &bin->size, length); |
|
if (!bin->data) |
|
return AVERROR(ENOMEM); |
|
|
|
bin->size = length; |
|
bin->pos = avio_tell(pb); |
|
if (avio_read(pb, bin->data, length) != length) { |
|
av_freep(&bin->data); |
|
bin->size = 0; |
|
return AVERROR(EIO); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element, but only the header. The contents |
|
* are supposed to be sub-elements which can be read separately. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length) |
|
{ |
|
AVIOContext *pb = matroska->ctx->pb; |
|
MatroskaLevel *level; |
|
|
|
if (matroska->num_levels >= EBML_MAX_DEPTH) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH); |
|
return AVERROR(ENOSYS); |
|
} |
|
|
|
level = &matroska->levels[matroska->num_levels++]; |
|
level->start = avio_tell(pb); |
|
level->length = length; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read signed/unsigned "EBML" numbers. |
|
* Return: number of bytes processed, < 0 on error |
|
*/ |
|
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, |
|
uint8_t *data, uint32_t size, uint64_t *num) |
|
{ |
|
AVIOContext pb; |
|
ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL); |
|
return ebml_read_num(matroska, &pb, FFMIN(size, 8), num); |
|
} |
|
|
|
/* |
|
* Same as above, but signed. |
|
*/ |
|
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, |
|
uint8_t *data, uint32_t size, int64_t *num) |
|
{ |
|
uint64_t unum; |
|
int res; |
|
|
|
/* read as unsigned number first */ |
|
if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0) |
|
return res; |
|
|
|
/* make signed (weird way) */ |
|
*num = unum - ((1LL << (7 * res - 1)) - 1); |
|
|
|
return res; |
|
} |
|
|
|
static int ebml_parse_elem(MatroskaDemuxContext *matroska, |
|
EbmlSyntax *syntax, void *data); |
|
|
|
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, |
|
uint32_t id, void *data) |
|
{ |
|
int i; |
|
for (i = 0; syntax[i].id; i++) |
|
if (id == syntax[i].id) |
|
break; |
|
if (!syntax[i].id && id == MATROSKA_ID_CLUSTER && |
|
matroska->num_levels > 0 && |
|
matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff) |
|
return 0; // we reached the end of an unknown size cluster |
|
if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) { |
|
av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id); |
|
if (matroska->ctx->error_recognition & AV_EF_EXPLODE) |
|
return AVERROR_INVALIDDATA; |
|
} |
|
return ebml_parse_elem(matroska, &syntax[i], data); |
|
} |
|
|
|
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, |
|
void *data) |
|
{ |
|
if (!matroska->current_id) { |
|
uint64_t id; |
|
int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id); |
|
if (res < 0) |
|
return res; |
|
matroska->current_id = id | 1 << 7 * res; |
|
} |
|
return ebml_parse_id(matroska, syntax, matroska->current_id, data); |
|
} |
|
|
|
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, |
|
void *data) |
|
{ |
|
int i, res = 0; |
|
|
|
for (i = 0; syntax[i].id; i++) |
|
switch (syntax[i].type) { |
|
case EBML_UINT: |
|
*(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u; |
|
break; |
|
case EBML_FLOAT: |
|
*(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f; |
|
break; |
|
case EBML_STR: |
|
case EBML_UTF8: |
|
// the default may be NULL |
|
if (syntax[i].def.s) { |
|
uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset); |
|
*dst = av_strdup(syntax[i].def.s); |
|
if (!*dst) |
|
return AVERROR(ENOMEM); |
|
} |
|
break; |
|
} |
|
|
|
while (!res && !ebml_level_end(matroska)) |
|
res = ebml_parse(matroska, syntax, data); |
|
|
|
return res; |
|
} |
|
|
|
static int ebml_parse_elem(MatroskaDemuxContext *matroska, |
|
EbmlSyntax *syntax, void *data) |
|
{ |
|
static const uint64_t max_lengths[EBML_TYPE_COUNT] = { |
|
[EBML_UINT] = 8, |
|
[EBML_FLOAT] = 8, |
|
// max. 16 MB for strings |
|
[EBML_STR] = 0x1000000, |
|
[EBML_UTF8] = 0x1000000, |
|
// max. 256 MB for binary data |
|
[EBML_BIN] = 0x10000000, |
|
// no limits for anything else |
|
}; |
|
AVIOContext *pb = matroska->ctx->pb; |
|
uint32_t id = syntax->id; |
|
uint64_t length; |
|
int res; |
|
void *newelem; |
|
|
|
data = (char *) data + syntax->data_offset; |
|
if (syntax->list_elem_size) { |
|
EbmlList *list = data; |
|
newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size); |
|
if (!newelem) |
|
return AVERROR(ENOMEM); |
|
list->elem = newelem; |
|
data = (char *) list->elem + list->nb_elem * syntax->list_elem_size; |
|
memset(data, 0, syntax->list_elem_size); |
|
list->nb_elem++; |
|
} |
|
|
|
if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) { |
|
matroska->current_id = 0; |
|
if ((res = ebml_read_length(matroska, pb, &length)) < 0) |
|
return res; |
|
if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n", |
|
length, max_lengths[syntax->type], syntax->type); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
} |
|
|
|
switch (syntax->type) { |
|
case EBML_UINT: |
|
res = ebml_read_uint(pb, length, data); |
|
break; |
|
case EBML_SINT: |
|
res = ebml_read_sint(pb, length, data); |
|
break; |
|
case EBML_FLOAT: |
|
res = ebml_read_float(pb, length, data); |
|
break; |
|
case EBML_STR: |
|
case EBML_UTF8: |
|
res = ebml_read_ascii(pb, length, data); |
|
break; |
|
case EBML_BIN: |
|
res = ebml_read_binary(pb, length, data); |
|
break; |
|
case EBML_NEST: |
|
if ((res = ebml_read_master(matroska, length)) < 0) |
|
return res; |
|
if (id == MATROSKA_ID_SEGMENT) |
|
matroska->segment_start = avio_tell(matroska->ctx->pb); |
|
return ebml_parse_nest(matroska, syntax->def.n, data); |
|
case EBML_PASS: |
|
return ebml_parse_id(matroska, syntax->def.n, id, data); |
|
case EBML_STOP: |
|
return 1; |
|
default: |
|
if (ffio_limit(pb, length) != length) |
|
return AVERROR(EIO); |
|
return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0; |
|
} |
|
if (res == AVERROR_INVALIDDATA) |
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n"); |
|
else if (res == AVERROR(EIO)) |
|
av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n"); |
|
return res; |
|
} |
|
|
|
static void ebml_free(EbmlSyntax *syntax, void *data) |
|
{ |
|
int i, j; |
|
for (i = 0; syntax[i].id; i++) { |
|
void *data_off = (char *) data + syntax[i].data_offset; |
|
switch (syntax[i].type) { |
|
case EBML_STR: |
|
case EBML_UTF8: |
|
av_freep(data_off); |
|
break; |
|
case EBML_BIN: |
|
av_freep(&((EbmlBin *) data_off)->data); |
|
break; |
|
case EBML_NEST: |
|
if (syntax[i].list_elem_size) { |
|
EbmlList *list = data_off; |
|
char *ptr = list->elem; |
|
for (j = 0; j < list->nb_elem; |
|
j++, ptr += syntax[i].list_elem_size) |
|
ebml_free(syntax[i].def.n, ptr); |
|
av_free(list->elem); |
|
} else |
|
ebml_free(syntax[i].def.n, data_off); |
|
default: |
|
break; |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* Autodetecting... |
|
*/ |
|
static int matroska_probe(AVProbeData *p) |
|
{ |
|
uint64_t total = 0; |
|
int len_mask = 0x80, size = 1, n = 1, i; |
|
|
|
/* EBML header? */ |
|
if (AV_RB32(p->buf) != EBML_ID_HEADER) |
|
return 0; |
|
|
|
/* length of header */ |
|
total = p->buf[4]; |
|
while (size <= 8 && !(total & len_mask)) { |
|
size++; |
|
len_mask >>= 1; |
|
} |
|
if (size > 8) |
|
return 0; |
|
total &= (len_mask - 1); |
|
while (n < size) |
|
total = (total << 8) | p->buf[4 + n++]; |
|
|
|
/* Does the probe data contain the whole header? */ |
|
if (p->buf_size < 4 + size + total) |
|
return 0; |
|
|
|
/* The header should contain a known document type. For now, |
|
* we don't parse the whole header but simply check for the |
|
* availability of that array of characters inside the header. |
|
* Not fully fool-proof, but good enough. */ |
|
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) { |
|
int probelen = strlen(matroska_doctypes[i]); |
|
if (total < probelen) |
|
continue; |
|
for (n = 4 + size; n <= 4 + size + total - probelen; n++) |
|
if (!memcmp(p->buf + n, matroska_doctypes[i], probelen)) |
|
return AVPROBE_SCORE_MAX; |
|
} |
|
|
|
// probably valid EBML header but no recognized doctype |
|
return AVPROBE_SCORE_EXTENSION; |
|
} |
|
|
|
static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska, |
|
int num) |
|
{ |
|
MatroskaTrack *tracks = matroska->tracks.elem; |
|
int i; |
|
|
|
for (i = 0; i < matroska->tracks.nb_elem; i++) |
|
if (tracks[i].num == num) |
|
return &tracks[i]; |
|
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num); |
|
return NULL; |
|
} |
|
|
|
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, |
|
MatroskaTrack *track) |
|
{ |
|
MatroskaTrackEncoding *encodings = track->encodings.elem; |
|
uint8_t *data = *buf; |
|
int isize = *buf_size; |
|
uint8_t *pkt_data = NULL; |
|
uint8_t av_unused *newpktdata; |
|
int pkt_size = isize; |
|
int result = 0; |
|
int olen; |
|
|
|
if (pkt_size >= 10000000U) |
|
return AVERROR_INVALIDDATA; |
|
|
|
switch (encodings[0].compression.algo) { |
|
case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: |
|
{ |
|
int header_size = encodings[0].compression.settings.size; |
|
uint8_t *header = encodings[0].compression.settings.data; |
|
|
|
if (header_size && !header) { |
|
av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n"); |
|
return -1; |
|
} |
|
|
|
if (!header_size) |
|
return 0; |
|
|
|
pkt_size = isize + header_size; |
|
pkt_data = av_malloc(pkt_size); |
|
if (!pkt_data) |
|
return AVERROR(ENOMEM); |
|
|
|
memcpy(pkt_data, header, header_size); |
|
memcpy(pkt_data + header_size, data, isize); |
|
break; |
|
} |
|
#if CONFIG_LZO |
|
case MATROSKA_TRACK_ENCODING_COMP_LZO: |
|
do { |
|
olen = pkt_size *= 3; |
|
newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING); |
|
if (!newpktdata) { |
|
result = AVERROR(ENOMEM); |
|
goto failed; |
|
} |
|
pkt_data = newpktdata; |
|
result = av_lzo1x_decode(pkt_data, &olen, data, &isize); |
|
} while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000); |
|
if (result) { |
|
result = AVERROR_INVALIDDATA; |
|
goto failed; |
|
} |
|
pkt_size -= olen; |
|
break; |
|
#endif |
|
#if CONFIG_ZLIB |
|
case MATROSKA_TRACK_ENCODING_COMP_ZLIB: |
|
{ |
|
z_stream zstream = { 0 }; |
|
if (inflateInit(&zstream) != Z_OK) |
|
return -1; |
|
zstream.next_in = data; |
|
zstream.avail_in = isize; |
|
do { |
|
pkt_size *= 3; |
|
newpktdata = av_realloc(pkt_data, pkt_size); |
|
if (!newpktdata) { |
|
inflateEnd(&zstream); |
|
goto failed; |
|
} |
|
pkt_data = newpktdata; |
|
zstream.avail_out = pkt_size - zstream.total_out; |
|
zstream.next_out = pkt_data + zstream.total_out; |
|
if (pkt_data) { |
|
result = inflate(&zstream, Z_NO_FLUSH); |
|
} else |
|
result = Z_MEM_ERROR; |
|
} while (result == Z_OK && pkt_size < 10000000); |
|
pkt_size = zstream.total_out; |
|
inflateEnd(&zstream); |
|
if (result != Z_STREAM_END) { |
|
if (result == Z_MEM_ERROR) |
|
result = AVERROR(ENOMEM); |
|
else |
|
result = AVERROR_INVALIDDATA; |
|
goto failed; |
|
} |
|
break; |
|
} |
|
#endif |
|
#if CONFIG_BZLIB |
|
case MATROSKA_TRACK_ENCODING_COMP_BZLIB: |
|
{ |
|
bz_stream bzstream = { 0 }; |
|
if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) |
|
return -1; |
|
bzstream.next_in = data; |
|
bzstream.avail_in = isize; |
|
do { |
|
pkt_size *= 3; |
|
newpktdata = av_realloc(pkt_data, pkt_size); |
|
if (!newpktdata) { |
|
BZ2_bzDecompressEnd(&bzstream); |
|
goto failed; |
|
} |
|
pkt_data = newpktdata; |
|
bzstream.avail_out = pkt_size - bzstream.total_out_lo32; |
|
bzstream.next_out = pkt_data + bzstream.total_out_lo32; |
|
if (pkt_data) { |
|
result = BZ2_bzDecompress(&bzstream); |
|
} else |
|
result = BZ_MEM_ERROR; |
|
} while (result == BZ_OK && pkt_size < 10000000); |
|
pkt_size = bzstream.total_out_lo32; |
|
BZ2_bzDecompressEnd(&bzstream); |
|
if (result != BZ_STREAM_END) { |
|
if (result == BZ_MEM_ERROR) |
|
result = AVERROR(ENOMEM); |
|
else |
|
result = AVERROR_INVALIDDATA; |
|
goto failed; |
|
} |
|
break; |
|
} |
|
#endif |
|
default: |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
*buf = pkt_data; |
|
*buf_size = pkt_size; |
|
return 0; |
|
|
|
failed: |
|
av_free(pkt_data); |
|
return result; |
|
} |
|
|
|
#if FF_API_ASS_SSA |
|
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, |
|
AVPacket *pkt, uint64_t display_duration) |
|
{ |
|
AVBufferRef *line; |
|
char *layer, *ptr = pkt->data, *end = ptr + pkt->size; |
|
|
|
for (; *ptr != ',' && ptr < end - 1; ptr++) |
|
; |
|
if (*ptr == ',') |
|
ptr++; |
|
layer = ptr; |
|
for (; *ptr != ',' && ptr < end - 1; ptr++) |
|
; |
|
if (*ptr == ',') { |
|
int64_t end_pts = pkt->pts + display_duration; |
|
int sc = matroska->time_scale * pkt->pts / 10000000; |
|
int ec = matroska->time_scale * end_pts / 10000000; |
|
int sh, sm, ss, eh, em, es, len; |
|
sh = sc / 360000; |
|
sc -= 360000 * sh; |
|
sm = sc / 6000; |
|
sc -= 6000 * sm; |
|
ss = sc / 100; |
|
sc -= 100 * ss; |
|
eh = ec / 360000; |
|
ec -= 360000 * eh; |
|
em = ec / 6000; |
|
ec -= 6000 * em; |
|
es = ec / 100; |
|
ec -= 100 * es; |
|
*ptr++ = '\0'; |
|
len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE; |
|
if (!(line = av_buffer_alloc(len))) |
|
return; |
|
snprintf(line->data, len, |
|
"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n", |
|
layer, sh, sm, ss, sc, eh, em, es, ec, ptr); |
|
av_buffer_unref(&pkt->buf); |
|
pkt->buf = line; |
|
pkt->data = line->data; |
|
pkt->size = strlen(line->data); |
|
} |
|
} |
|
|
|
static int matroska_merge_packets(AVPacket *out, AVPacket *in) |
|
{ |
|
int ret = av_grow_packet(out, in->size); |
|
if (ret < 0) |
|
return ret; |
|
|
|
memcpy(out->data + out->size - in->size, in->data, in->size); |
|
|
|
av_free_packet(in); |
|
av_free(in); |
|
return 0; |
|
} |
|
#endif |
|
|
|
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, |
|
AVDictionary **metadata, char *prefix) |
|
{ |
|
MatroskaTag *tags = list->elem; |
|
char key[1024]; |
|
int i; |
|
|
|
for (i = 0; i < list->nb_elem; i++) { |
|
const char *lang = tags[i].lang && |
|
strcmp(tags[i].lang, "und") ? tags[i].lang : NULL; |
|
|
|
if (!tags[i].name) { |
|
av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n"); |
|
continue; |
|
} |
|
if (prefix) |
|
snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name); |
|
else |
|
av_strlcpy(key, tags[i].name, sizeof(key)); |
|
if (tags[i].def || !lang) { |
|
av_dict_set(metadata, key, tags[i].string, 0); |
|
if (tags[i].sub.nb_elem) |
|
matroska_convert_tag(s, &tags[i].sub, metadata, key); |
|
} |
|
if (lang) { |
|
av_strlcat(key, "-", sizeof(key)); |
|
av_strlcat(key, lang, sizeof(key)); |
|
av_dict_set(metadata, key, tags[i].string, 0); |
|
if (tags[i].sub.nb_elem) |
|
matroska_convert_tag(s, &tags[i].sub, metadata, key); |
|
} |
|
} |
|
ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv); |
|
} |
|
|
|
static void matroska_convert_tags(AVFormatContext *s) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
MatroskaTags *tags = matroska->tags.elem; |
|
int i, j; |
|
|
|
for (i = 0; i < matroska->tags.nb_elem; i++) { |
|
if (tags[i].target.attachuid) { |
|
MatroskaAttachment *attachment = matroska->attachments.elem; |
|
for (j = 0; j < matroska->attachments.nb_elem; j++) |
|
if (attachment[j].uid == tags[i].target.attachuid && |
|
attachment[j].stream) |
|
matroska_convert_tag(s, &tags[i].tag, |
|
&attachment[j].stream->metadata, NULL); |
|
} else if (tags[i].target.chapteruid) { |
|
MatroskaChapter *chapter = matroska->chapters.elem; |
|
for (j = 0; j < matroska->chapters.nb_elem; j++) |
|
if (chapter[j].uid == tags[i].target.chapteruid && |
|
chapter[j].chapter) |
|
matroska_convert_tag(s, &tags[i].tag, |
|
&chapter[j].chapter->metadata, NULL); |
|
} else if (tags[i].target.trackuid) { |
|
MatroskaTrack *track = matroska->tracks.elem; |
|
for (j = 0; j < matroska->tracks.nb_elem; j++) |
|
if (track[j].uid == tags[i].target.trackuid && track[j].stream) |
|
matroska_convert_tag(s, &tags[i].tag, |
|
&track[j].stream->metadata, NULL); |
|
} else { |
|
matroska_convert_tag(s, &tags[i].tag, &s->metadata, |
|
tags[i].target.type); |
|
} |
|
} |
|
} |
|
|
|
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, |
|
int idx) |
|
{ |
|
EbmlList *seekhead_list = &matroska->seekhead; |
|
uint32_t level_up = matroska->level_up; |
|
uint32_t saved_id = matroska->current_id; |
|
MatroskaSeekhead *seekhead = seekhead_list->elem; |
|
int64_t before_pos = avio_tell(matroska->ctx->pb); |
|
MatroskaLevel level; |
|
int64_t offset; |
|
int ret = 0; |
|
|
|
if (idx >= seekhead_list->nb_elem || |
|
seekhead[idx].id == MATROSKA_ID_SEEKHEAD || |
|
seekhead[idx].id == MATROSKA_ID_CLUSTER) |
|
return 0; |
|
|
|
/* seek */ |
|
offset = seekhead[idx].pos + matroska->segment_start; |
|
if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) { |
|
/* We don't want to lose our seekhead level, so we add |
|
* a dummy. This is a crude hack. */ |
|
if (matroska->num_levels == EBML_MAX_DEPTH) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Max EBML element depth (%d) reached, " |
|
"cannot parse further.\n", EBML_MAX_DEPTH); |
|
ret = AVERROR_INVALIDDATA; |
|
} else { |
|
level.start = 0; |
|
level.length = (uint64_t) -1; |
|
matroska->levels[matroska->num_levels] = level; |
|
matroska->num_levels++; |
|
matroska->current_id = 0; |
|
|
|
ret = ebml_parse(matroska, matroska_segment, matroska); |
|
|
|
/* remove dummy level */ |
|
while (matroska->num_levels) { |
|
uint64_t length = matroska->levels[--matroska->num_levels].length; |
|
if (length == (uint64_t) -1) |
|
break; |
|
} |
|
} |
|
} |
|
/* seek back */ |
|
avio_seek(matroska->ctx->pb, before_pos, SEEK_SET); |
|
matroska->level_up = level_up; |
|
matroska->current_id = saved_id; |
|
|
|
return ret; |
|
} |
|
|
|
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska) |
|
{ |
|
EbmlList *seekhead_list = &matroska->seekhead; |
|
int64_t before_pos = avio_tell(matroska->ctx->pb); |
|
int i; |
|
|
|
// we should not do any seeking in the streaming case |
|
if (!matroska->ctx->pb->seekable || |
|
(matroska->ctx->flags & AVFMT_FLAG_IGNIDX)) |
|
return; |
|
|
|
for (i = 0; i < seekhead_list->nb_elem; i++) { |
|
MatroskaSeekhead *seekhead = seekhead_list->elem; |
|
if (seekhead[i].pos <= before_pos) |
|
continue; |
|
|
|
// defer cues parsing until we actually need cue data. |
|
if (seekhead[i].id == MATROSKA_ID_CUES) { |
|
matroska->cues_parsing_deferred = 1; |
|
continue; |
|
} |
|
|
|
if (matroska_parse_seekhead_entry(matroska, i) < 0) { |
|
// mark index as broken |
|
matroska->cues_parsing_deferred = -1; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
static void matroska_add_index_entries(MatroskaDemuxContext *matroska) |
|
{ |
|
EbmlList *index_list; |
|
MatroskaIndex *index; |
|
int index_scale = 1; |
|
int i, j; |
|
|
|
index_list = &matroska->index; |
|
index = index_list->elem; |
|
if (index_list->nb_elem && |
|
index[0].time > 1E14 / matroska->time_scale) { |
|
av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n"); |
|
index_scale = matroska->time_scale; |
|
} |
|
for (i = 0; i < index_list->nb_elem; i++) { |
|
EbmlList *pos_list = &index[i].pos; |
|
MatroskaIndexPos *pos = pos_list->elem; |
|
for (j = 0; j < pos_list->nb_elem; j++) { |
|
MatroskaTrack *track = matroska_find_track_by_num(matroska, |
|
pos[j].track); |
|
if (track && track->stream) |
|
av_add_index_entry(track->stream, |
|
pos[j].pos + matroska->segment_start, |
|
index[i].time / index_scale, 0, 0, |
|
AVINDEX_KEYFRAME); |
|
} |
|
} |
|
} |
|
|
|
static void matroska_parse_cues(MatroskaDemuxContext *matroska) { |
|
EbmlList *seekhead_list = &matroska->seekhead; |
|
MatroskaSeekhead *seekhead = seekhead_list->elem; |
|
int i; |
|
|
|
for (i = 0; i < seekhead_list->nb_elem; i++) |
|
if (seekhead[i].id == MATROSKA_ID_CUES) |
|
break; |
|
av_assert1(i <= seekhead_list->nb_elem); |
|
|
|
if (matroska_parse_seekhead_entry(matroska, i) < 0) |
|
matroska->cues_parsing_deferred = -1; |
|
matroska_add_index_entries(matroska); |
|
} |
|
|
|
static int matroska_aac_profile(char *codec_id) |
|
{ |
|
static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" }; |
|
int profile; |
|
|
|
for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++) |
|
if (strstr(codec_id, aac_profiles[profile])) |
|
break; |
|
return profile + 1; |
|
} |
|
|
|
static int matroska_aac_sri(int samplerate) |
|
{ |
|
int sri; |
|
|
|
for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++) |
|
if (avpriv_mpeg4audio_sample_rates[sri] == samplerate) |
|
break; |
|
return sri; |
|
} |
|
|
|
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc) |
|
{ |
|
char buffer[32]; |
|
/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */ |
|
time_t creation_time = date_utc / 1000000000 + 978307200; |
|
struct tm *ptm = gmtime(&creation_time); |
|
if (!ptm) return; |
|
strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm); |
|
av_dict_set(metadata, "creation_time", buffer, 0); |
|
} |
|
|
|
static int matroska_parse_flac(AVFormatContext *s, |
|
MatroskaTrack *track, |
|
int *offset) |
|
{ |
|
AVStream *st = track->stream; |
|
uint8_t *p = track->codec_priv.data; |
|
int size = track->codec_priv.size; |
|
|
|
if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) { |
|
av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n"); |
|
track->codec_priv.size = 0; |
|
return 0; |
|
} |
|
*offset = 8; |
|
track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE; |
|
|
|
p += track->codec_priv.size; |
|
size -= track->codec_priv.size; |
|
|
|
/* parse the remaining metadata blocks if present */ |
|
while (size >= 4) { |
|
int block_last, block_type, block_size; |
|
|
|
flac_parse_block_header(p, &block_last, &block_type, &block_size); |
|
|
|
p += 4; |
|
size -= 4; |
|
if (block_size > size) |
|
return 0; |
|
|
|
/* check for the channel mask */ |
|
if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) { |
|
AVDictionary *dict = NULL; |
|
AVDictionaryEntry *chmask; |
|
|
|
ff_vorbis_comment(s, &dict, p, block_size, 0); |
|
chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0); |
|
if (chmask) { |
|
uint64_t mask = strtol(chmask->value, NULL, 0); |
|
if (!mask || mask & ~0x3ffffULL) { |
|
av_log(s, AV_LOG_WARNING, |
|
"Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n"); |
|
} else |
|
st->codec->channel_layout = mask; |
|
} |
|
av_dict_free(&dict); |
|
} |
|
|
|
p += block_size; |
|
size -= block_size; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int matroska_parse_tracks(AVFormatContext *s) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
MatroskaTrack *tracks = matroska->tracks.elem; |
|
AVStream *st; |
|
int i, j, ret; |
|
int k; |
|
|
|
for (i = 0; i < matroska->tracks.nb_elem; i++) { |
|
MatroskaTrack *track = &tracks[i]; |
|
enum AVCodecID codec_id = AV_CODEC_ID_NONE; |
|
EbmlList *encodings_list = &track->encodings; |
|
MatroskaTrackEncoding *encodings = encodings_list->elem; |
|
uint8_t *extradata = NULL; |
|
int extradata_size = 0; |
|
int extradata_offset = 0; |
|
uint32_t fourcc = 0; |
|
AVIOContext b; |
|
char* key_id_base64 = NULL; |
|
int bit_depth = -1; |
|
|
|
/* Apply some sanity checks. */ |
|
if (track->type != MATROSKA_TRACK_TYPE_VIDEO && |
|
track->type != MATROSKA_TRACK_TYPE_AUDIO && |
|
track->type != MATROSKA_TRACK_TYPE_SUBTITLE && |
|
track->type != MATROSKA_TRACK_TYPE_METADATA) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown or unsupported track type %"PRIu64"\n", |
|
track->type); |
|
continue; |
|
} |
|
if (track->codec_id == NULL) |
|
continue; |
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { |
|
if (!track->default_duration && track->video.frame_rate > 0) |
|
track->default_duration = 1000000000 / track->video.frame_rate; |
|
if (track->video.display_width == -1) |
|
track->video.display_width = track->video.pixel_width; |
|
if (track->video.display_height == -1) |
|
track->video.display_height = track->video.pixel_height; |
|
if (track->video.color_space.size == 4) |
|
fourcc = AV_RL32(track->video.color_space.data); |
|
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { |
|
if (!track->audio.out_samplerate) |
|
track->audio.out_samplerate = track->audio.samplerate; |
|
} |
|
if (encodings_list->nb_elem > 1) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Multiple combined encodings not supported"); |
|
} else if (encodings_list->nb_elem == 1) { |
|
if (encodings[0].type) { |
|
if (encodings[0].encryption.key_id.size > 0) { |
|
/* Save the encryption key id to be stored later as a |
|
metadata tag. */ |
|
const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size); |
|
key_id_base64 = av_malloc(b64_size); |
|
if (key_id_base64 == NULL) |
|
return AVERROR(ENOMEM); |
|
|
|
av_base64_encode(key_id_base64, b64_size, |
|
encodings[0].encryption.key_id.data, |
|
encodings[0].encryption.key_id.size); |
|
} else { |
|
encodings[0].scope = 0; |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Unsupported encoding type"); |
|
} |
|
} else if ( |
|
#if CONFIG_ZLIB |
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB && |
|
#endif |
|
#if CONFIG_BZLIB |
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB && |
|
#endif |
|
#if CONFIG_LZO |
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO && |
|
#endif |
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) { |
|
encodings[0].scope = 0; |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Unsupported encoding type"); |
|
} else if (track->codec_priv.size && encodings[0].scope & 2) { |
|
uint8_t *codec_priv = track->codec_priv.data; |
|
int ret = matroska_decode_buffer(&track->codec_priv.data, |
|
&track->codec_priv.size, |
|
track); |
|
if (ret < 0) { |
|
track->codec_priv.data = NULL; |
|
track->codec_priv.size = 0; |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Failed to decode codec private data\n"); |
|
} |
|
|
|
if (codec_priv != track->codec_priv.data) |
|
av_free(codec_priv); |
|
} |
|
} |
|
|
|
for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) { |
|
if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, |
|
strlen(ff_mkv_codec_tags[j].str))) { |
|
codec_id = ff_mkv_codec_tags[j].id; |
|
break; |
|
} |
|
} |
|
|
|
st = track->stream = avformat_new_stream(s, NULL); |
|
if (st == NULL) { |
|
av_free(key_id_base64); |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
if (key_id_base64) { |
|
/* export encryption key id as base64 metadata tag */ |
|
av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0); |
|
av_freep(&key_id_base64); |
|
} |
|
|
|
if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") && |
|
track->codec_priv.size >= 40 && |
|
track->codec_priv.data != NULL) { |
|
track->ms_compat = 1; |
|
bit_depth = AV_RL16(track->codec_priv.data + 14); |
|
fourcc = AV_RL32(track->codec_priv.data + 16); |
|
codec_id = ff_codec_get_id(ff_codec_bmp_tags, |
|
fourcc); |
|
if (!codec_id) |
|
codec_id = ff_codec_get_id(ff_codec_movvideo_tags, |
|
fourcc); |
|
extradata_offset = 40; |
|
} else if (!strcmp(track->codec_id, "A_MS/ACM") && |
|
track->codec_priv.size >= 14 && |
|
track->codec_priv.data != NULL) { |
|
int ret; |
|
ffio_init_context(&b, track->codec_priv.data, |
|
track->codec_priv.size, |
|
0, NULL, NULL, NULL, NULL); |
|
ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size); |
|
if (ret < 0) |
|
return ret; |
|
codec_id = st->codec->codec_id; |
|
extradata_offset = FFMIN(track->codec_priv.size, 18); |
|
} else if (!strcmp(track->codec_id, "A_QUICKTIME") |
|
&& (track->codec_priv.size >= 86) |
|
&& (track->codec_priv.data != NULL)) { |
|
fourcc = AV_RL32(track->codec_priv.data + 4); |
|
codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc); |
|
if (ff_codec_get_id(ff_codec_movaudio_tags, AV_RL32(track->codec_priv.data))) { |
|
fourcc = AV_RL32(track->codec_priv.data); |
|
codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc); |
|
} |
|
} else if (!strcmp(track->codec_id, "V_QUICKTIME") && |
|
(track->codec_priv.size >= 21) && |
|
(track->codec_priv.data != NULL)) { |
|
fourcc = AV_RL32(track->codec_priv.data + 4); |
|
codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc); |
|
if (ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(track->codec_priv.data))) { |
|
fourcc = AV_RL32(track->codec_priv.data); |
|
codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc); |
|
} |
|
if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) |
|
codec_id = AV_CODEC_ID_SVQ3; |
|
} else if (codec_id == AV_CODEC_ID_PCM_S16BE) { |
|
switch (track->audio.bitdepth) { |
|
case 8: |
|
codec_id = AV_CODEC_ID_PCM_U8; |
|
break; |
|
case 24: |
|
codec_id = AV_CODEC_ID_PCM_S24BE; |
|
break; |
|
case 32: |
|
codec_id = AV_CODEC_ID_PCM_S32BE; |
|
break; |
|
} |
|
} else if (codec_id == AV_CODEC_ID_PCM_S16LE) { |
|
switch (track->audio.bitdepth) { |
|
case 8: |
|
codec_id = AV_CODEC_ID_PCM_U8; |
|
break; |
|
case 24: |
|
codec_id = AV_CODEC_ID_PCM_S24LE; |
|
break; |
|
case 32: |
|
codec_id = AV_CODEC_ID_PCM_S32LE; |
|
break; |
|
} |
|
} else if (codec_id == AV_CODEC_ID_PCM_F32LE && |
|
track->audio.bitdepth == 64) { |
|
codec_id = AV_CODEC_ID_PCM_F64LE; |
|
} else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) { |
|
int profile = matroska_aac_profile(track->codec_id); |
|
int sri = matroska_aac_sri(track->audio.samplerate); |
|
extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1); |
|
extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3); |
|
if (strstr(track->codec_id, "SBR")) { |
|
sri = matroska_aac_sri(track->audio.out_samplerate); |
|
extradata[2] = 0x56; |
|
extradata[3] = 0xE5; |
|
extradata[4] = 0x80 | (sri << 3); |
|
extradata_size = 5; |
|
} else |
|
extradata_size = 2; |
|
} else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) { |
|
/* Only ALAC's magic cookie is stored in Matroska's track headers. |
|
* Create the "atom size", "tag", and "tag version" fields the |
|
* decoder expects manually. */ |
|
extradata_size = 12 + track->codec_priv.size; |
|
extradata = av_mallocz(extradata_size + |
|
FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
AV_WB32(extradata, extradata_size); |
|
memcpy(&extradata[4], "alac", 4); |
|
AV_WB32(&extradata[8], 0); |
|
memcpy(&extradata[12], track->codec_priv.data, |
|
track->codec_priv.size); |
|
} else if (codec_id == AV_CODEC_ID_TTA) { |
|
extradata_size = 30; |
|
extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
ffio_init_context(&b, extradata, extradata_size, 1, |
|
NULL, NULL, NULL, NULL); |
|
avio_write(&b, "TTA1", 4); |
|
avio_wl16(&b, 1); |
|
avio_wl16(&b, track->audio.channels); |
|
avio_wl16(&b, track->audio.bitdepth); |
|
if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX) |
|
return AVERROR_INVALIDDATA; |
|
avio_wl32(&b, track->audio.out_samplerate); |
|
avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale), |
|
track->audio.out_samplerate, |
|
AV_TIME_BASE * 1000)); |
|
} else if (codec_id == AV_CODEC_ID_RV10 || |
|
codec_id == AV_CODEC_ID_RV20 || |
|
codec_id == AV_CODEC_ID_RV30 || |
|
codec_id == AV_CODEC_ID_RV40) { |
|
extradata_offset = 26; |
|
} else if (codec_id == AV_CODEC_ID_RA_144) { |
|
track->audio.out_samplerate = 8000; |
|
track->audio.channels = 1; |
|
} else if ((codec_id == AV_CODEC_ID_RA_288 || |
|
codec_id == AV_CODEC_ID_COOK || |
|
codec_id == AV_CODEC_ID_ATRAC3 || |
|
codec_id == AV_CODEC_ID_SIPR) |
|
&& track->codec_priv.data) { |
|
int flavor; |
|
|
|
ffio_init_context(&b, track->codec_priv.data, |
|
track->codec_priv.size, |
|
0, NULL, NULL, NULL, NULL); |
|
avio_skip(&b, 22); |
|
flavor = avio_rb16(&b); |
|
track->audio.coded_framesize = avio_rb32(&b); |
|
avio_skip(&b, 12); |
|
track->audio.sub_packet_h = avio_rb16(&b); |
|
track->audio.frame_size = avio_rb16(&b); |
|
track->audio.sub_packet_size = avio_rb16(&b); |
|
if (flavor < 0 || |
|
track->audio.coded_framesize <= 0 || |
|
track->audio.sub_packet_h <= 0 || |
|
track->audio.frame_size <= 0 || |
|
track->audio.sub_packet_size <= 0) |
|
return AVERROR_INVALIDDATA; |
|
track->audio.buf = av_malloc_array(track->audio.sub_packet_h, |
|
track->audio.frame_size); |
|
if (!track->audio.buf) |
|
return AVERROR(ENOMEM); |
|
if (codec_id == AV_CODEC_ID_RA_288) { |
|
st->codec->block_align = track->audio.coded_framesize; |
|
track->codec_priv.size = 0; |
|
} else { |
|
if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) { |
|
static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 }; |
|
track->audio.sub_packet_size = ff_sipr_subpk_size[flavor]; |
|
st->codec->bit_rate = sipr_bit_rate[flavor]; |
|
} |
|
st->codec->block_align = track->audio.sub_packet_size; |
|
extradata_offset = 78; |
|
} |
|
} else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) { |
|
ret = matroska_parse_flac(s, track, &extradata_offset); |
|
if (ret < 0) |
|
return ret; |
|
} else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) { |
|
fourcc = AV_RL32(track->codec_priv.data); |
|
} |
|
track->codec_priv.size -= extradata_offset; |
|
|
|
if (codec_id == AV_CODEC_ID_NONE) |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown/unsupported AVCodecID %s.\n", track->codec_id); |
|
|
|
if (track->time_scale < 0.01) |
|
track->time_scale = 1.0; |
|
avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale, |
|
1000 * 1000 * 1000); /* 64 bit pts in ns */ |
|
|
|
/* convert the delay from ns to the track timebase */ |
|
track->codec_delay = av_rescale_q(track->codec_delay, |
|
(AVRational){ 1, 1000000000 }, |
|
st->time_base); |
|
|
|
st->codec->codec_id = codec_id; |
|
|
|
if (strcmp(track->language, "und")) |
|
av_dict_set(&st->metadata, "language", track->language, 0); |
|
av_dict_set(&st->metadata, "title", track->name, 0); |
|
|
|
if (track->flag_default) |
|
st->disposition |= AV_DISPOSITION_DEFAULT; |
|
if (track->flag_forced) |
|
st->disposition |= AV_DISPOSITION_FORCED; |
|
|
|
if (!st->codec->extradata) { |
|
if (extradata) { |
|
st->codec->extradata = extradata; |
|
st->codec->extradata_size = extradata_size; |
|
} else if (track->codec_priv.data && track->codec_priv.size > 0) { |
|
if (ff_alloc_extradata(st->codec, track->codec_priv.size)) |
|
return AVERROR(ENOMEM); |
|
memcpy(st->codec->extradata, |
|
track->codec_priv.data + extradata_offset, |
|
track->codec_priv.size); |
|
} |
|
} |
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { |
|
MatroskaTrackPlane *planes = track->operation.combine_planes.elem; |
|
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
|
st->codec->codec_tag = fourcc; |
|
if (bit_depth >= 0) |
|
st->codec->bits_per_coded_sample = bit_depth; |
|
st->codec->width = track->video.pixel_width; |
|
st->codec->height = track->video.pixel_height; |
|
av_reduce(&st->sample_aspect_ratio.num, |
|
&st->sample_aspect_ratio.den, |
|
st->codec->height * track->video.display_width, |
|
st->codec->width * track->video.display_height, |
|
255); |
|
if (st->codec->codec_id != AV_CODEC_ID_HEVC) |
|
st->need_parsing = AVSTREAM_PARSE_HEADERS; |
|
|
|
if (track->default_duration) { |
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
|
1000000000, track->default_duration, 30000); |
|
#if FF_API_R_FRAME_RATE |
|
if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000L) |
|
st->r_frame_rate = st->avg_frame_rate; |
|
#endif |
|
} |
|
|
|
/* export stereo mode flag as metadata tag */ |
|
if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT) |
|
av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0); |
|
|
|
/* export alpha mode flag as metadata tag */ |
|
if (track->video.alpha_mode) |
|
av_dict_set(&st->metadata, "alpha_mode", "1", 0); |
|
|
|
/* if we have virtual track, mark the real tracks */ |
|
for (j=0; j < track->operation.combine_planes.nb_elem; j++) { |
|
char buf[32]; |
|
if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT) |
|
continue; |
|
snprintf(buf, sizeof(buf), "%s_%d", |
|
ff_matroska_video_stereo_plane[planes[j].type], i); |
|
for (k=0; k < matroska->tracks.nb_elem; k++) |
|
if (planes[j].uid == tracks[k].uid) { |
|
av_dict_set(&s->streams[k]->metadata, |
|
"stereo_mode", buf, 0); |
|
break; |
|
} |
|
} |
|
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { |
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
|
st->codec->sample_rate = track->audio.out_samplerate; |
|
st->codec->channels = track->audio.channels; |
|
if (!st->codec->bits_per_coded_sample) |
|
st->codec->bits_per_coded_sample = track->audio.bitdepth; |
|
if (st->codec->codec_id != AV_CODEC_ID_AAC) |
|
st->need_parsing = AVSTREAM_PARSE_HEADERS; |
|
if (track->codec_delay > 0) { |
|
st->codec->delay = av_rescale_q(track->codec_delay, |
|
st->time_base, |
|
(AVRational){1, st->codec->sample_rate}); |
|
} |
|
if (track->seek_preroll > 0) { |
|
av_codec_set_seek_preroll(st->codec, |
|
av_rescale_q(track->seek_preroll, |
|
(AVRational){1, 1000000000}, |
|
(AVRational){1, st->codec->sample_rate})); |
|
} |
|
} else if (codec_id == AV_CODEC_ID_WEBVTT) { |
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
|
|
|
if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) { |
|
st->disposition |= AV_DISPOSITION_CAPTIONS; |
|
} else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) { |
|
st->disposition |= AV_DISPOSITION_DESCRIPTIONS; |
|
} else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) { |
|
st->disposition |= AV_DISPOSITION_METADATA; |
|
} |
|
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { |
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
|
#if FF_API_ASS_SSA |
|
if (st->codec->codec_id == AV_CODEC_ID_SSA || |
|
st->codec->codec_id == AV_CODEC_ID_ASS) |
|
#else |
|
if (st->codec->codec_id == AV_CODEC_ID_ASS) |
|
#endif |
|
matroska->contains_ssa = 1; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int matroska_read_header(AVFormatContext *s) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
EbmlList *attachments_list = &matroska->attachments; |
|
EbmlList *chapters_list = &matroska->chapters; |
|
MatroskaAttachment *attachments; |
|
MatroskaChapter *chapters; |
|
uint64_t max_start = 0; |
|
int64_t pos; |
|
Ebml ebml = { 0 }; |
|
int i, j, res; |
|
|
|
matroska->ctx = s; |
|
|
|
/* First read the EBML header. */ |
|
if (ebml_parse(matroska, ebml_syntax, &ebml) || |
|
ebml.version > EBML_VERSION || |
|
ebml.max_size > sizeof(uint64_t) || |
|
ebml.id_length > sizeof(uint32_t) || |
|
ebml.doctype_version > 3 || |
|
!ebml.doctype) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"EBML header using unsupported features\n" |
|
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", |
|
ebml.version, ebml.doctype, ebml.doctype_version); |
|
ebml_free(ebml_syntax, &ebml); |
|
return AVERROR_PATCHWELCOME; |
|
} else if (ebml.doctype_version == 3) { |
|
av_log(matroska->ctx, AV_LOG_WARNING, |
|
"EBML header using unsupported features\n" |
|
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", |
|
ebml.version, ebml.doctype, ebml.doctype_version); |
|
} |
|
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) |
|
if (!strcmp(ebml.doctype, matroska_doctypes[i])) |
|
break; |
|
if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) { |
|
av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype); |
|
if (matroska->ctx->error_recognition & AV_EF_EXPLODE) { |
|
ebml_free(ebml_syntax, &ebml); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
} |
|
ebml_free(ebml_syntax, &ebml); |
|
|
|
/* The next thing is a segment. */ |
|
pos = avio_tell(matroska->ctx->pb); |
|
res = ebml_parse(matroska, matroska_segments, matroska); |
|
// try resyncing until we find a EBML_STOP type element. |
|
while (res != 1) { |
|
res = matroska_resync(matroska, pos); |
|
if (res < 0) |
|
return res; |
|
pos = avio_tell(matroska->ctx->pb); |
|
res = ebml_parse(matroska, matroska_segment, matroska); |
|
} |
|
matroska_execute_seekhead(matroska); |
|
|
|
if (!matroska->time_scale) |
|
matroska->time_scale = 1000000; |
|
if (matroska->duration) |
|
matroska->ctx->duration = matroska->duration * matroska->time_scale * |
|
1000 / AV_TIME_BASE; |
|
av_dict_set(&s->metadata, "title", matroska->title, 0); |
|
av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0); |
|
|
|
if (matroska->date_utc.size == 8) |
|
matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data)); |
|
|
|
res = matroska_parse_tracks(s); |
|
if (res < 0) |
|
return res; |
|
|
|
attachments = attachments_list->elem; |
|
for (j = 0; j < attachments_list->nb_elem; j++) { |
|
if (!(attachments[j].filename && attachments[j].mime && |
|
attachments[j].bin.data && attachments[j].bin.size > 0)) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); |
|
} else { |
|
AVStream *st = avformat_new_stream(s, NULL); |
|
if (st == NULL) |
|
break; |
|
av_dict_set(&st->metadata, "filename", attachments[j].filename, 0); |
|
av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0); |
|
st->codec->codec_id = AV_CODEC_ID_NONE; |
|
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; |
|
if (ff_alloc_extradata(st->codec, attachments[j].bin.size)) |
|
break; |
|
memcpy(st->codec->extradata, attachments[j].bin.data, |
|
attachments[j].bin.size); |
|
|
|
for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) { |
|
if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime, |
|
strlen(ff_mkv_mime_tags[i].str))) { |
|
st->codec->codec_id = ff_mkv_mime_tags[i].id; |
|
break; |
|
} |
|
} |
|
attachments[j].stream = st; |
|
} |
|
} |
|
|
|
chapters = chapters_list->elem; |
|
for (i = 0; i < chapters_list->nb_elem; i++) |
|
if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid && |
|
(max_start == 0 || chapters[i].start > max_start)) { |
|
chapters[i].chapter = |
|
avpriv_new_chapter(s, chapters[i].uid, |
|
(AVRational) { 1, 1000000000 }, |
|
chapters[i].start, chapters[i].end, |
|
chapters[i].title); |
|
av_dict_set(&chapters[i].chapter->metadata, |
|
"title", chapters[i].title, 0); |
|
max_start = chapters[i].start; |
|
} |
|
|
|
matroska_add_index_entries(matroska); |
|
|
|
matroska_convert_tags(s); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Put one packet in an application-supplied AVPacket struct. |
|
* Returns 0 on success or -1 on failure. |
|
*/ |
|
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, |
|
AVPacket *pkt) |
|
{ |
|
if (matroska->num_packets > 0) { |
|
memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); |
|
av_free(matroska->packets[0]); |
|
if (matroska->num_packets > 1) { |
|
void *newpackets; |
|
memmove(&matroska->packets[0], &matroska->packets[1], |
|
(matroska->num_packets - 1) * sizeof(AVPacket *)); |
|
newpackets = av_realloc(matroska->packets, |
|
(matroska->num_packets - 1) * |
|
sizeof(AVPacket *)); |
|
if (newpackets) |
|
matroska->packets = newpackets; |
|
} else { |
|
av_freep(&matroska->packets); |
|
matroska->prev_pkt = NULL; |
|
} |
|
matroska->num_packets--; |
|
return 0; |
|
} |
|
|
|
return -1; |
|
} |
|
|
|
/* |
|
* Free all packets in our internal queue. |
|
*/ |
|
static void matroska_clear_queue(MatroskaDemuxContext *matroska) |
|
{ |
|
matroska->prev_pkt = NULL; |
|
if (matroska->packets) { |
|
int n; |
|
for (n = 0; n < matroska->num_packets; n++) { |
|
av_free_packet(matroska->packets[n]); |
|
av_free(matroska->packets[n]); |
|
} |
|
av_freep(&matroska->packets); |
|
matroska->num_packets = 0; |
|
} |
|
} |
|
|
|
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, |
|
int *buf_size, int type, |
|
uint32_t **lace_buf, int *laces) |
|
{ |
|
int res = 0, n, size = *buf_size; |
|
uint8_t *data = *buf; |
|
uint32_t *lace_size; |
|
|
|
if (!type) { |
|
*laces = 1; |
|
*lace_buf = av_mallocz(sizeof(int)); |
|
if (!*lace_buf) |
|
return AVERROR(ENOMEM); |
|
|
|
*lace_buf[0] = size; |
|
return 0; |
|
} |
|
|
|
av_assert0(size > 0); |
|
*laces = *data + 1; |
|
data += 1; |
|
size -= 1; |
|
lace_size = av_mallocz(*laces * sizeof(int)); |
|
if (!lace_size) |
|
return AVERROR(ENOMEM); |
|
|
|
switch (type) { |
|
case 0x1: /* Xiph lacing */ |
|
{ |
|
uint8_t temp; |
|
uint32_t total = 0; |
|
for (n = 0; res == 0 && n < *laces - 1; n++) { |
|
while (1) { |
|
if (size <= total) { |
|
res = AVERROR_INVALIDDATA; |
|
break; |
|
} |
|
temp = *data; |
|
total += temp; |
|
lace_size[n] += temp; |
|
data += 1; |
|
size -= 1; |
|
if (temp != 0xff) |
|
break; |
|
} |
|
} |
|
if (size <= total) { |
|
res = AVERROR_INVALIDDATA; |
|
break; |
|
} |
|
|
|
lace_size[n] = size - total; |
|
break; |
|
} |
|
|
|
case 0x2: /* fixed-size lacing */ |
|
if (size % (*laces)) { |
|
res = AVERROR_INVALIDDATA; |
|
break; |
|
} |
|
for (n = 0; n < *laces; n++) |
|
lace_size[n] = size / *laces; |
|
break; |
|
|
|
case 0x3: /* EBML lacing */ |
|
{ |
|
uint64_t num; |
|
uint64_t total; |
|
n = matroska_ebmlnum_uint(matroska, data, size, &num); |
|
if (n < 0 || num > INT_MAX) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"EBML block data error\n"); |
|
res = n<0 ? n : AVERROR_INVALIDDATA; |
|
break; |
|
} |
|
data += n; |
|
size -= n; |
|
total = lace_size[0] = num; |
|
for (n = 1; res == 0 && n < *laces - 1; n++) { |
|
int64_t snum; |
|
int r; |
|
r = matroska_ebmlnum_sint(matroska, data, size, &snum); |
|
if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"EBML block data error\n"); |
|
res = r<0 ? r : AVERROR_INVALIDDATA; |
|
break; |
|
} |
|
data += r; |
|
size -= r; |
|
lace_size[n] = lace_size[n - 1] + snum; |
|
total += lace_size[n]; |
|
} |
|
if (size <= total) { |
|
res = AVERROR_INVALIDDATA; |
|
break; |
|
} |
|
lace_size[*laces - 1] = size - total; |
|
break; |
|
} |
|
} |
|
|
|
*buf = data; |
|
*lace_buf = lace_size; |
|
*buf_size = size; |
|
|
|
return res; |
|
} |
|
|
|
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska, |
|
MatroskaTrack *track, AVStream *st, |
|
uint8_t *data, int size, uint64_t timecode, |
|
int64_t pos) |
|
{ |
|
int a = st->codec->block_align; |
|
int sps = track->audio.sub_packet_size; |
|
int cfs = track->audio.coded_framesize; |
|
int h = track->audio.sub_packet_h; |
|
int y = track->audio.sub_packet_cnt; |
|
int w = track->audio.frame_size; |
|
int x; |
|
|
|
if (!track->audio.pkt_cnt) { |
|
if (track->audio.sub_packet_cnt == 0) |
|
track->audio.buf_timecode = timecode; |
|
if (st->codec->codec_id == AV_CODEC_ID_RA_288) { |
|
if (size < cfs * h / 2) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Corrupt int4 RM-style audio packet size\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
for (x = 0; x < h / 2; x++) |
|
memcpy(track->audio.buf + x * 2 * w + y * cfs, |
|
data + x * cfs, cfs); |
|
} else if (st->codec->codec_id == AV_CODEC_ID_SIPR) { |
|
if (size < w) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Corrupt sipr RM-style audio packet size\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
memcpy(track->audio.buf + y * w, data, w); |
|
} else { |
|
if (size < sps * w / sps || h<=0 || w%sps) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Corrupt generic RM-style audio packet size\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
for (x = 0; x < w / sps; x++) |
|
memcpy(track->audio.buf + |
|
sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)), |
|
data + x * sps, sps); |
|
} |
|
|
|
if (++track->audio.sub_packet_cnt >= h) { |
|
if (st->codec->codec_id == AV_CODEC_ID_SIPR) |
|
ff_rm_reorder_sipr_data(track->audio.buf, h, w); |
|
track->audio.sub_packet_cnt = 0; |
|
track->audio.pkt_cnt = h * w / a; |
|
} |
|
} |
|
|
|
while (track->audio.pkt_cnt) { |
|
AVPacket *pkt = NULL; |
|
if (!(pkt = av_mallocz(sizeof(AVPacket))) || av_new_packet(pkt, a) < 0) { |
|
av_free(pkt); |
|
return AVERROR(ENOMEM); |
|
} |
|
memcpy(pkt->data, |
|
track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--), |
|
a); |
|
pkt->pts = track->audio.buf_timecode; |
|
track->audio.buf_timecode = AV_NOPTS_VALUE; |
|
pkt->pos = pos; |
|
pkt->stream_index = st->index; |
|
dynarray_add(&matroska->packets, &matroska->num_packets, pkt); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* reconstruct full wavpack blocks from mangled matroska ones */ |
|
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, |
|
uint8_t **pdst, int *size) |
|
{ |
|
uint8_t *dst = NULL; |
|
int dstlen = 0; |
|
int srclen = *size; |
|
uint32_t samples; |
|
uint16_t ver; |
|
int ret, offset = 0; |
|
|
|
if (srclen < 12 || track->stream->codec->extradata_size < 2) |
|
return AVERROR_INVALIDDATA; |
|
|
|
ver = AV_RL16(track->stream->codec->extradata); |
|
|
|
samples = AV_RL32(src); |
|
src += 4; |
|
srclen -= 4; |
|
|
|
while (srclen >= 8) { |
|
int multiblock; |
|
uint32_t blocksize; |
|
uint8_t *tmp; |
|
|
|
uint32_t flags = AV_RL32(src); |
|
uint32_t crc = AV_RL32(src + 4); |
|
src += 8; |
|
srclen -= 8; |
|
|
|
multiblock = (flags & 0x1800) != 0x1800; |
|
if (multiblock) { |
|
if (srclen < 4) { |
|
ret = AVERROR_INVALIDDATA; |
|
goto fail; |
|
} |
|
blocksize = AV_RL32(src); |
|
src += 4; |
|
srclen -= 4; |
|
} else |
|
blocksize = srclen; |
|
|
|
if (blocksize > srclen) { |
|
ret = AVERROR_INVALIDDATA; |
|
goto fail; |
|
} |
|
|
|
tmp = av_realloc(dst, dstlen + blocksize + 32); |
|
if (!tmp) { |
|
ret = AVERROR(ENOMEM); |
|
goto fail; |
|
} |
|
dst = tmp; |
|
dstlen += blocksize + 32; |
|
|
|
AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag |
|
AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8 |
|
AV_WL16(dst + offset + 8, ver); // version |
|
AV_WL16(dst + offset + 10, 0); // track/index_no |
|
AV_WL32(dst + offset + 12, 0); // total samples |
|
AV_WL32(dst + offset + 16, 0); // block index |
|
AV_WL32(dst + offset + 20, samples); // number of samples |
|
AV_WL32(dst + offset + 24, flags); // flags |
|
AV_WL32(dst + offset + 28, crc); // crc |
|
memcpy(dst + offset + 32, src, blocksize); // block data |
|
|
|
src += blocksize; |
|
srclen -= blocksize; |
|
offset += blocksize + 32; |
|
} |
|
|
|
*pdst = dst; |
|
*size = dstlen; |
|
|
|
return 0; |
|
|
|
fail: |
|
av_freep(&dst); |
|
return ret; |
|
} |
|
|
|
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska, |
|
MatroskaTrack *track, |
|
AVStream *st, |
|
uint8_t *data, int data_len, |
|
uint64_t timecode, |
|
uint64_t duration, |
|
int64_t pos) |
|
{ |
|
AVPacket *pkt; |
|
uint8_t *id, *settings, *text, *buf; |
|
int id_len, settings_len, text_len; |
|
uint8_t *p, *q; |
|
int err; |
|
|
|
if (data_len <= 0) |
|
return AVERROR_INVALIDDATA; |
|
|
|
p = data; |
|
q = data + data_len; |
|
|
|
id = p; |
|
id_len = -1; |
|
while (p < q) { |
|
if (*p == '\r' || *p == '\n') { |
|
id_len = p - id; |
|
if (*p == '\r') |
|
p++; |
|
break; |
|
} |
|
p++; |
|
} |
|
|
|
if (p >= q || *p != '\n') |
|
return AVERROR_INVALIDDATA; |
|
p++; |
|
|
|
settings = p; |
|
settings_len = -1; |
|
while (p < q) { |
|
if (*p == '\r' || *p == '\n') { |
|
settings_len = p - settings; |
|
if (*p == '\r') |
|
p++; |
|
break; |
|
} |
|
p++; |
|
} |
|
|
|
if (p >= q || *p != '\n') |
|
return AVERROR_INVALIDDATA; |
|
p++; |
|
|
|
text = p; |
|
text_len = q - p; |
|
while (text_len > 0) { |
|
const int len = text_len - 1; |
|
const uint8_t c = p[len]; |
|
if (c != '\r' && c != '\n') |
|
break; |
|
text_len = len; |
|
} |
|
|
|
if (text_len <= 0) |
|
return AVERROR_INVALIDDATA; |
|
|
|
pkt = av_mallocz(sizeof(*pkt)); |
|
err = av_new_packet(pkt, text_len); |
|
if (err < 0) { |
|
av_free(pkt); |
|
return AVERROR(err); |
|
} |
|
|
|
memcpy(pkt->data, text, text_len); |
|
|
|
if (id_len > 0) { |
|
buf = av_packet_new_side_data(pkt, |
|
AV_PKT_DATA_WEBVTT_IDENTIFIER, |
|
id_len); |
|
if (buf == NULL) { |
|
av_free(pkt); |
|
return AVERROR(ENOMEM); |
|
} |
|
memcpy(buf, id, id_len); |
|
} |
|
|
|
if (settings_len > 0) { |
|
buf = av_packet_new_side_data(pkt, |
|
AV_PKT_DATA_WEBVTT_SETTINGS, |
|
settings_len); |
|
if (buf == NULL) { |
|
av_free(pkt); |
|
return AVERROR(ENOMEM); |
|
} |
|
memcpy(buf, settings, settings_len); |
|
} |
|
|
|
// Do we need this for subtitles? |
|
// pkt->flags = AV_PKT_FLAG_KEY; |
|
|
|
pkt->stream_index = st->index; |
|
pkt->pts = timecode; |
|
|
|
// Do we need this for subtitles? |
|
// pkt->dts = timecode; |
|
|
|
pkt->duration = duration; |
|
pkt->pos = pos; |
|
|
|
dynarray_add(&matroska->packets, &matroska->num_packets, pkt); |
|
matroska->prev_pkt = pkt; |
|
|
|
return 0; |
|
} |
|
|
|
static int matroska_parse_frame(MatroskaDemuxContext *matroska, |
|
MatroskaTrack *track, AVStream *st, |
|
uint8_t *data, int pkt_size, |
|
uint64_t timecode, uint64_t lace_duration, |
|
int64_t pos, int is_keyframe, |
|
uint8_t *additional, uint64_t additional_id, int additional_size, |
|
int64_t discard_padding) |
|
{ |
|
MatroskaTrackEncoding *encodings = track->encodings.elem; |
|
uint8_t *pkt_data = data; |
|
int offset = 0, res; |
|
AVPacket *pkt; |
|
|
|
if (encodings && !encodings->type && encodings->scope & 1) { |
|
res = matroska_decode_buffer(&pkt_data, &pkt_size, track); |
|
if (res < 0) |
|
return res; |
|
} |
|
|
|
if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) { |
|
uint8_t *wv_data; |
|
res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size); |
|
if (res < 0) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Error parsing a wavpack block.\n"); |
|
goto fail; |
|
} |
|
if (pkt_data != data) |
|
av_freep(&pkt_data); |
|
pkt_data = wv_data; |
|
} |
|
|
|
if (st->codec->codec_id == AV_CODEC_ID_PRORES && |
|
AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f')) |
|
offset = 8; |
|
|
|
pkt = av_mallocz(sizeof(AVPacket)); |
|
/* XXX: prevent data copy... */ |
|
if (av_new_packet(pkt, pkt_size + offset) < 0) { |
|
av_free(pkt); |
|
res = AVERROR(ENOMEM); |
|
goto fail; |
|
} |
|
|
|
if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) { |
|
uint8_t *buf = pkt->data; |
|
bytestream_put_be32(&buf, pkt_size); |
|
bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f')); |
|
} |
|
|
|
memcpy(pkt->data + offset, pkt_data, pkt_size); |
|
|
|
if (pkt_data != data) |
|
av_freep(&pkt_data); |
|
|
|
pkt->flags = is_keyframe; |
|
pkt->stream_index = st->index; |
|
|
|
if (additional_size > 0) { |
|
uint8_t *side_data = av_packet_new_side_data(pkt, |
|
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, |
|
additional_size + 8); |
|
if (side_data == NULL) { |
|
av_free_packet(pkt); |
|
av_free(pkt); |
|
return AVERROR(ENOMEM); |
|
} |
|
AV_WB64(side_data, additional_id); |
|
memcpy(side_data + 8, additional, additional_size); |
|
} |
|
|
|
if (discard_padding) { |
|
uint8_t *side_data = av_packet_new_side_data(pkt, |
|
AV_PKT_DATA_SKIP_SAMPLES, |
|
10); |
|
if (side_data == NULL) { |
|
av_free_packet(pkt); |
|
av_free(pkt); |
|
return AVERROR(ENOMEM); |
|
} |
|
AV_WL32(side_data, 0); |
|
AV_WL32(side_data + 4, av_rescale_q(discard_padding, |
|
(AVRational){1, 1000000000}, |
|
(AVRational){1, st->codec->sample_rate})); |
|
} |
|
|
|
if (track->ms_compat) |
|
pkt->dts = timecode; |
|
else |
|
pkt->pts = timecode; |
|
pkt->pos = pos; |
|
if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) { |
|
/* |
|
* For backward compatibility. |
|
* Historically, we have put subtitle duration |
|
* in convergence_duration, on the off chance |
|
* that the time_scale is less than 1us, which |
|
* could result in a 32bit overflow on the |
|
* normal duration field. |
|
*/ |
|
pkt->convergence_duration = lace_duration; |
|
} |
|
|
|
if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE || |
|
lace_duration <= INT_MAX) { |
|
/* |
|
* For non subtitle tracks, just store the duration |
|
* as normal. |
|
* |
|
* If it's a subtitle track and duration value does |
|
* not overflow a uint32, then also store it normally. |
|
*/ |
|
pkt->duration = lace_duration; |
|
} |
|
|
|
#if FF_API_ASS_SSA |
|
if (st->codec->codec_id == AV_CODEC_ID_SSA) |
|
matroska_fix_ass_packet(matroska, pkt, lace_duration); |
|
|
|
if (matroska->prev_pkt && |
|
timecode != AV_NOPTS_VALUE && |
|
matroska->prev_pkt->pts == timecode && |
|
matroska->prev_pkt->stream_index == st->index && |
|
st->codec->codec_id == AV_CODEC_ID_SSA) |
|
matroska_merge_packets(matroska->prev_pkt, pkt); |
|
else { |
|
dynarray_add(&matroska->packets, &matroska->num_packets, pkt); |
|
matroska->prev_pkt = pkt; |
|
} |
|
#else |
|
dynarray_add(&matroska->packets, &matroska->num_packets, pkt); |
|
matroska->prev_pkt = pkt; |
|
#endif |
|
|
|
return 0; |
|
|
|
fail: |
|
if (pkt_data != data) |
|
av_freep(&pkt_data); |
|
return res; |
|
} |
|
|
|
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, |
|
int size, int64_t pos, uint64_t cluster_time, |
|
uint64_t block_duration, int is_keyframe, |
|
uint8_t *additional, uint64_t additional_id, int additional_size, |
|
int64_t cluster_pos, int64_t discard_padding) |
|
{ |
|
uint64_t timecode = AV_NOPTS_VALUE; |
|
MatroskaTrack *track; |
|
int res = 0; |
|
AVStream *st; |
|
int16_t block_time; |
|
uint32_t *lace_size = NULL; |
|
int n, flags, laces = 0; |
|
uint64_t num; |
|
int trust_default_duration = 1; |
|
|
|
if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); |
|
return n; |
|
} |
|
data += n; |
|
size -= n; |
|
|
|
track = matroska_find_track_by_num(matroska, num); |
|
if (!track || !track->stream) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Invalid stream %"PRIu64" or size %u\n", num, size); |
|
return AVERROR_INVALIDDATA; |
|
} else if (size <= 3) |
|
return 0; |
|
st = track->stream; |
|
if (st->discard >= AVDISCARD_ALL) |
|
return res; |
|
av_assert1(block_duration != AV_NOPTS_VALUE); |
|
|
|
block_time = sign_extend(AV_RB16(data), 16); |
|
data += 2; |
|
flags = *data++; |
|
size -= 3; |
|
if (is_keyframe == -1) |
|
is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0; |
|
|
|
if (cluster_time != (uint64_t) -1 && |
|
(block_time >= 0 || cluster_time >= -block_time)) { |
|
timecode = cluster_time + block_time - track->codec_delay; |
|
if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE && |
|
timecode < track->end_timecode) |
|
is_keyframe = 0; /* overlapping subtitles are not key frame */ |
|
if (is_keyframe) |
|
av_add_index_entry(st, cluster_pos, timecode, 0, 0, |
|
AVINDEX_KEYFRAME); |
|
} |
|
|
|
if (matroska->skip_to_keyframe && |
|
track->type != MATROSKA_TRACK_TYPE_SUBTITLE) { |
|
if (timecode < matroska->skip_to_timecode) |
|
return res; |
|
if (is_keyframe) |
|
matroska->skip_to_keyframe = 0; |
|
else if (!st->skip_to_keyframe) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n"); |
|
matroska->skip_to_keyframe = 0; |
|
} |
|
} |
|
|
|
res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1, |
|
&lace_size, &laces); |
|
|
|
if (res) |
|
goto end; |
|
|
|
if (track->audio.samplerate == 8000) { |
|
// If this is needed for more codecs, then add them here |
|
if (st->codec->codec_id == AV_CODEC_ID_AC3) { |
|
if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size) |
|
trust_default_duration = 0; |
|
} |
|
} |
|
|
|
if (!block_duration && trust_default_duration) |
|
block_duration = track->default_duration * laces / matroska->time_scale; |
|
|
|
if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time)) |
|
track->end_timecode = |
|
FFMAX(track->end_timecode, timecode + block_duration); |
|
|
|
for (n = 0; n < laces; n++) { |
|
int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces; |
|
|
|
if (lace_size[n] > size) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n"); |
|
break; |
|
} |
|
|
|
if ((st->codec->codec_id == AV_CODEC_ID_RA_288 || |
|
st->codec->codec_id == AV_CODEC_ID_COOK || |
|
st->codec->codec_id == AV_CODEC_ID_SIPR || |
|
st->codec->codec_id == AV_CODEC_ID_ATRAC3) && |
|
st->codec->block_align && track->audio.sub_packet_size) { |
|
res = matroska_parse_rm_audio(matroska, track, st, data, |
|
lace_size[n], |
|
timecode, pos); |
|
if (res) |
|
goto end; |
|
|
|
} else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) { |
|
res = matroska_parse_webvtt(matroska, track, st, |
|
data, lace_size[n], |
|
timecode, lace_duration, |
|
pos); |
|
if (res) |
|
goto end; |
|
} else { |
|
res = matroska_parse_frame(matroska, track, st, data, lace_size[n], |
|
timecode, lace_duration, pos, |
|
!n ? is_keyframe : 0, |
|
additional, additional_id, additional_size, |
|
discard_padding); |
|
if (res) |
|
goto end; |
|
} |
|
|
|
if (timecode != AV_NOPTS_VALUE) |
|
timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE; |
|
data += lace_size[n]; |
|
size -= lace_size[n]; |
|
} |
|
|
|
end: |
|
av_free(lace_size); |
|
return res; |
|
} |
|
|
|
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska) |
|
{ |
|
EbmlList *blocks_list; |
|
MatroskaBlock *blocks; |
|
int i, res; |
|
res = ebml_parse(matroska, |
|
matroska_cluster_incremental_parsing, |
|
&matroska->current_cluster); |
|
if (res == 1) { |
|
/* New Cluster */ |
|
if (matroska->current_cluster_pos) |
|
ebml_level_end(matroska); |
|
ebml_free(matroska_cluster, &matroska->current_cluster); |
|
memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster)); |
|
matroska->current_cluster_num_blocks = 0; |
|
matroska->current_cluster_pos = avio_tell(matroska->ctx->pb); |
|
matroska->prev_pkt = NULL; |
|
/* sizeof the ID which was already read */ |
|
if (matroska->current_id) |
|
matroska->current_cluster_pos -= 4; |
|
res = ebml_parse(matroska, |
|
matroska_clusters_incremental, |
|
&matroska->current_cluster); |
|
/* Try parsing the block again. */ |
|
if (res == 1) |
|
res = ebml_parse(matroska, |
|
matroska_cluster_incremental_parsing, |
|
&matroska->current_cluster); |
|
} |
|
|
|
if (!res && |
|
matroska->current_cluster_num_blocks < |
|
matroska->current_cluster.blocks.nb_elem) { |
|
blocks_list = &matroska->current_cluster.blocks; |
|
blocks = blocks_list->elem; |
|
|
|
matroska->current_cluster_num_blocks = blocks_list->nb_elem; |
|
i = blocks_list->nb_elem - 1; |
|
if (blocks[i].bin.size > 0 && blocks[i].bin.data) { |
|
int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1; |
|
uint8_t* additional = blocks[i].additional.size > 0 ? |
|
blocks[i].additional.data : NULL; |
|
if (!blocks[i].non_simple) |
|
blocks[i].duration = 0; |
|
res = matroska_parse_block(matroska, blocks[i].bin.data, |
|
blocks[i].bin.size, blocks[i].bin.pos, |
|
matroska->current_cluster.timecode, |
|
blocks[i].duration, is_keyframe, |
|
additional, blocks[i].additional_id, |
|
blocks[i].additional.size, |
|
matroska->current_cluster_pos, |
|
blocks[i].discard_padding); |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int matroska_parse_cluster(MatroskaDemuxContext *matroska) |
|
{ |
|
MatroskaCluster cluster = { 0 }; |
|
EbmlList *blocks_list; |
|
MatroskaBlock *blocks; |
|
int i, res; |
|
int64_t pos; |
|
|
|
if (!matroska->contains_ssa) |
|
return matroska_parse_cluster_incremental(matroska); |
|
pos = avio_tell(matroska->ctx->pb); |
|
matroska->prev_pkt = NULL; |
|
if (matroska->current_id) |
|
pos -= 4; /* sizeof the ID which was already read */ |
|
res = ebml_parse(matroska, matroska_clusters, &cluster); |
|
blocks_list = &cluster.blocks; |
|
blocks = blocks_list->elem; |
|
for (i = 0; i < blocks_list->nb_elem; i++) |
|
if (blocks[i].bin.size > 0 && blocks[i].bin.data) { |
|
int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1; |
|
res = matroska_parse_block(matroska, blocks[i].bin.data, |
|
blocks[i].bin.size, blocks[i].bin.pos, |
|
cluster.timecode, blocks[i].duration, |
|
is_keyframe, NULL, 0, 0, pos, |
|
blocks[i].discard_padding); |
|
} |
|
ebml_free(matroska_cluster, &cluster); |
|
return res; |
|
} |
|
|
|
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
|
|
while (matroska_deliver_packet(matroska, pkt)) { |
|
int64_t pos = avio_tell(matroska->ctx->pb); |
|
if (matroska->done) |
|
return AVERROR_EOF; |
|
if (matroska_parse_cluster(matroska) < 0) |
|
matroska_resync(matroska, pos); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int matroska_read_seek(AVFormatContext *s, int stream_index, |
|
int64_t timestamp, int flags) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
MatroskaTrack *tracks = matroska->tracks.elem; |
|
AVStream *st = s->streams[stream_index]; |
|
int i, index, index_sub, index_min; |
|
|
|
/* Parse the CUES now since we need the index data to seek. */ |
|
if (matroska->cues_parsing_deferred > 0) { |
|
matroska->cues_parsing_deferred = 0; |
|
matroska_parse_cues(matroska); |
|
} |
|
|
|
if (!st->nb_index_entries) |
|
goto err; |
|
timestamp = FFMAX(timestamp, st->index_entries[0].timestamp); |
|
|
|
if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { |
|
avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos, |
|
SEEK_SET); |
|
matroska->current_id = 0; |
|
while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) { |
|
matroska_clear_queue(matroska); |
|
if (matroska_parse_cluster(matroska) < 0) |
|
break; |
|
} |
|
} |
|
|
|
matroska_clear_queue(matroska); |
|
if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1)) |
|
goto err; |
|
|
|
index_min = index; |
|
for (i = 0; i < matroska->tracks.nb_elem; i++) { |
|
tracks[i].audio.pkt_cnt = 0; |
|
tracks[i].audio.sub_packet_cnt = 0; |
|
tracks[i].audio.buf_timecode = AV_NOPTS_VALUE; |
|
tracks[i].end_timecode = 0; |
|
if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE && |
|
tracks[i].stream->discard != AVDISCARD_ALL) { |
|
index_sub = av_index_search_timestamp( |
|
tracks[i].stream, st->index_entries[index].timestamp, |
|
AVSEEK_FLAG_BACKWARD); |
|
while (index_sub >= 0 && |
|
index_min >= 0 && |
|
tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos && |
|
st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale) |
|
index_min--; |
|
} |
|
} |
|
|
|
avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET); |
|
matroska->current_id = 0; |
|
if (flags & AVSEEK_FLAG_ANY) { |
|
st->skip_to_keyframe = 0; |
|
matroska->skip_to_timecode = timestamp; |
|
} else { |
|
st->skip_to_keyframe = 1; |
|
matroska->skip_to_timecode = st->index_entries[index].timestamp; |
|
} |
|
matroska->skip_to_keyframe = 1; |
|
matroska->done = 0; |
|
matroska->num_levels = 0; |
|
ff_update_cur_dts(s, st, st->index_entries[index].timestamp); |
|
return 0; |
|
err: |
|
// slightly hackish but allows proper fallback to |
|
// the generic seeking code. |
|
matroska_clear_queue(matroska); |
|
matroska->current_id = 0; |
|
st->skip_to_keyframe = |
|
matroska->skip_to_keyframe = 0; |
|
matroska->done = 0; |
|
matroska->num_levels = 0; |
|
return -1; |
|
} |
|
|
|
static int matroska_read_close(AVFormatContext *s) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
MatroskaTrack *tracks = matroska->tracks.elem; |
|
int n; |
|
|
|
matroska_clear_queue(matroska); |
|
|
|
for (n = 0; n < matroska->tracks.nb_elem; n++) |
|
if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO) |
|
av_free(tracks[n].audio.buf); |
|
ebml_free(matroska_cluster, &matroska->current_cluster); |
|
ebml_free(matroska_segment, matroska); |
|
|
|
return 0; |
|
} |
|
|
|
AVInputFormat ff_matroska_demuxer = { |
|
.name = "matroska,webm", |
|
.long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"), |
|
.priv_data_size = sizeof(MatroskaDemuxContext), |
|
.read_probe = matroska_probe, |
|
.read_header = matroska_read_header, |
|
.read_packet = matroska_read_packet, |
|
.read_close = matroska_read_close, |
|
.read_seek = matroska_read_seek, |
|
};
|
|
|