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3079 lines
101 KiB
3079 lines
101 KiB
/* |
|
* Matroska file demuxer (no muxer yet) |
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* Copyright (c) 2003-2004 The ffmpeg Project |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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/** |
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* @file matroskadec.c |
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* Matroska file demuxer |
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* by Ronald Bultje <rbultje@ronald.bitfreak.net> |
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* with a little help from Moritz Bunkus <moritz@bunkus.org> |
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* Specs available on the matroska project page: |
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* http://www.matroska.org/. |
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*/ |
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|
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#include "avformat.h" |
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/* For codec_get_id(). */ |
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#include "riff.h" |
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#include "matroska.h" |
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#include "libavcodec/mpeg4audio.h" |
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#include "libavutil/intfloat_readwrite.h" |
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#include "libavutil/lzo.h" |
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#ifdef CONFIG_ZLIB |
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#include <zlib.h> |
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#endif |
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#ifdef CONFIG_BZLIB |
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#include <bzlib.h> |
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#endif |
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|
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typedef struct Track { |
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MatroskaTrackType type; |
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|
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/* Unique track number and track ID. stream_index is the index that |
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* the calling app uses for this track. */ |
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uint32_t num; |
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uint32_t uid; |
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int stream_index; |
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|
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char *name; |
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char language[4]; |
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char *codec_id; |
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char *codec_name; |
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|
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unsigned char *codec_priv; |
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int codec_priv_size; |
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|
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uint64_t default_duration; |
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MatroskaTrackFlags flags; |
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|
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int encoding_scope; |
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MatroskaTrackEncodingCompAlgo encoding_algo; |
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uint8_t *encoding_settings; |
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int encoding_settings_len; |
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} MatroskaTrack; |
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|
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typedef struct MatroskaVideoTrack { |
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MatroskaTrack track; |
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|
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int pixel_width; |
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int pixel_height; |
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int display_width; |
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int display_height; |
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|
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uint32_t fourcc; |
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|
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MatroskaAspectRatioMode ar_mode; |
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MatroskaEyeMode eye_mode; |
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|
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//.. |
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} MatroskaVideoTrack; |
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|
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typedef struct MatroskaAudioTrack { |
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MatroskaTrack track; |
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|
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int channels; |
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int bitdepth; |
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int internal_samplerate; |
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int samplerate; |
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int block_align; |
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|
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/* real audio header */ |
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int coded_framesize; |
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int sub_packet_h; |
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int frame_size; |
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int sub_packet_size; |
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int sub_packet_cnt; |
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int pkt_cnt; |
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uint8_t *buf; |
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//.. |
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} MatroskaAudioTrack; |
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|
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typedef struct MatroskaSubtitleTrack { |
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MatroskaTrack track; |
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//.. |
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} MatroskaSubtitleTrack; |
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|
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#define MAX_TRACK_SIZE (FFMAX3(sizeof(MatroskaVideoTrack), \ |
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sizeof(MatroskaAudioTrack), \ |
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sizeof(MatroskaSubtitleTrack))) |
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|
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typedef struct MatroskaLevel { |
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uint64_t start; |
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uint64_t length; |
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} MatroskaLevel; |
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|
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typedef struct MatroskaDemuxIndex { |
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uint64_t pos; /* of the corresponding *cluster*! */ |
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uint16_t track; /* reference to 'num' */ |
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uint64_t time; /* in nanoseconds */ |
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} MatroskaDemuxIndex; |
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|
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typedef struct MatroskaDemuxContext { |
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AVFormatContext *ctx; |
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|
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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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|
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/* matroska stuff */ |
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char *writing_app; |
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char *muxing_app; |
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int64_t created; |
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|
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/* timescale in the file */ |
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int64_t time_scale; |
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|
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/* num_streams is the number of streams that av_new_stream() was called |
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* for ( = that are available to the calling program). */ |
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int num_tracks; |
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int num_streams; |
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MatroskaTrack *tracks[MAX_STREAMS]; |
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|
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/* cache for ID peeking */ |
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uint32_t peek_id; |
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|
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/* byte position of the segment inside the stream */ |
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offset_t segment_start; |
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|
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/* The packet queue. */ |
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AVPacket **packets; |
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int num_packets; |
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|
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/* have we already parse metadata/cues/clusters? */ |
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int metadata_parsed; |
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int index_parsed; |
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int done; |
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|
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/* The index for seeking. */ |
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int num_indexes; |
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MatroskaDemuxIndex *index; |
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|
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/* What to skip before effectively reading a packet. */ |
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int skip_to_keyframe; |
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AVStream *skip_to_stream; |
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} MatroskaDemuxContext; |
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|
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/* |
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* The first few functions handle EBML file parsing. The rest |
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* is the document interpretation. Matroska really just is a |
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* EBML file. |
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*/ |
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|
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/* |
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* Return: the amount of levels in the hierarchy that the |
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* current element lies higher than the previous one. |
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* The opposite isn't done - that's auto-done using master |
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* element reading. |
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*/ |
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|
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static int |
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ebml_read_element_level_up (MatroskaDemuxContext *matroska) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
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offset_t pos = url_ftell(pb); |
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int num = 0; |
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|
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while (matroska->num_levels > 0) { |
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MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1]; |
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|
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if (pos >= level->start + level->length) { |
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matroska->num_levels--; |
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num++; |
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} else { |
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break; |
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} |
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} |
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|
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return num; |
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} |
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|
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/* |
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* Read: an "EBML number", which is defined as a variable-length |
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* array of bytes. The first byte indicates the length by giving a |
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* number of 0-bits followed by a one. The position of the first |
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* "one" bit inside the first byte indicates the length of this |
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* number. |
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* Returns: num. of bytes read. < 0 on error. |
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*/ |
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|
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static int |
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ebml_read_num (MatroskaDemuxContext *matroska, |
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int max_size, |
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uint64_t *number) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
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int len_mask = 0x80, read = 1, n = 1; |
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int64_t total = 0; |
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|
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/* the first byte tells us the length in bytes - get_byte() can normally |
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* return 0, but since that's not a valid first ebmlID byte, we can |
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* use it safely here to catch EOS. */ |
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if (!(total = get_byte(pb))) { |
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/* we might encounter EOS here */ |
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if (!url_feof(pb)) { |
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offset_t pos = url_ftell(pb); |
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av_log(matroska->ctx, AV_LOG_ERROR, |
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"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", |
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pos, pos); |
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} |
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return AVERROR(EIO); /* EOS or actual I/O error */ |
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} |
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|
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/* get the length of the EBML number */ |
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while (read <= max_size && !(total & len_mask)) { |
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read++; |
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len_mask >>= 1; |
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} |
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if (read > max_size) { |
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offset_t pos = url_ftell(pb) - 1; |
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av_log(matroska->ctx, AV_LOG_ERROR, |
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"Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", |
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(uint8_t) total, pos, pos); |
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return AVERROR_INVALIDDATA; |
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} |
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|
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/* read out length */ |
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total &= ~len_mask; |
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while (n++ < read) |
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total = (total << 8) | get_byte(pb); |
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|
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*number = total; |
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|
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return read; |
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} |
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|
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/* |
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* Read: the element content data ID. |
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* Return: the number of bytes read or < 0 on error. |
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*/ |
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|
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static int |
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ebml_read_element_id (MatroskaDemuxContext *matroska, |
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uint32_t *id, |
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int *level_up) |
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{ |
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int read; |
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uint64_t total; |
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|
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/* if we re-call this, use our cached ID */ |
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if (matroska->peek_id != 0) { |
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if (level_up) |
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*level_up = 0; |
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*id = matroska->peek_id; |
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return 0; |
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} |
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|
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/* read out the "EBML number", include tag in ID */ |
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if ((read = ebml_read_num(matroska, 4, &total)) < 0) |
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return read; |
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*id = matroska->peek_id = total | (1 << (read * 7)); |
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|
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/* level tracking */ |
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if (level_up) |
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*level_up = ebml_read_element_level_up(matroska); |
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|
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return read; |
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} |
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|
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/* |
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* Read: element content length. |
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* Return: the number of bytes read or < 0 on error. |
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*/ |
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|
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static int |
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ebml_read_element_length (MatroskaDemuxContext *matroska, |
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uint64_t *length) |
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{ |
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/* clear cache since we're now beyond that data point */ |
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matroska->peek_id = 0; |
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|
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/* read out the "EBML number", include tag in ID */ |
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return ebml_read_num(matroska, 8, length); |
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} |
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|
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/* |
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* Return: the ID of the next element, or 0 on error. |
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* Level_up contains the amount of levels that this |
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* next element lies higher than the previous one. |
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*/ |
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|
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static uint32_t |
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ebml_peek_id (MatroskaDemuxContext *matroska, |
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int *level_up) |
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{ |
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uint32_t id; |
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|
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if (ebml_read_element_id(matroska, &id, level_up) < 0) |
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return 0; |
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|
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return id; |
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} |
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|
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/* |
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* Seek to a given offset. |
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* 0 is success, -1 is failure. |
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*/ |
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|
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static int |
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ebml_read_seek (MatroskaDemuxContext *matroska, |
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offset_t offset) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
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|
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/* clear ID cache, if any */ |
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matroska->peek_id = 0; |
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|
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return (url_fseek(pb, offset, SEEK_SET) == offset) ? 0 : -1; |
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} |
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|
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/* |
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* Skip the next element. |
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* 0 is success, -1 is failure. |
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*/ |
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|
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static int |
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ebml_read_skip (MatroskaDemuxContext *matroska) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
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uint32_t id; |
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uint64_t length; |
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int res; |
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|
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if ((res = ebml_read_element_id(matroska, &id, NULL)) < 0 || |
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(res = ebml_read_element_length(matroska, &length)) < 0) |
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return res; |
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|
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url_fskip(pb, length); |
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|
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return 0; |
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} |
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|
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/* |
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* Read the next element as an unsigned int. |
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* 0 is success, < 0 is failure. |
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*/ |
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|
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static int |
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ebml_read_uint (MatroskaDemuxContext *matroska, |
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uint32_t *id, |
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uint64_t *num) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
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int n = 0, size, res; |
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uint64_t rlength; |
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|
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if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
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(res = ebml_read_element_length(matroska, &rlength)) < 0) |
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return res; |
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size = rlength; |
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if (size < 1 || size > 8) { |
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offset_t pos = url_ftell(pb); |
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av_log(matroska->ctx, AV_LOG_ERROR, |
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"Invalid uint element size %d at position %"PRId64" (0x%"PRIx64")\n", |
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size, pos, pos); |
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return AVERROR_INVALIDDATA; |
|
} |
|
|
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/* big-endian ordening; build up number */ |
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*num = 0; |
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while (n++ < size) |
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*num = (*num << 8) | get_byte(pb); |
|
|
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return 0; |
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} |
|
|
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/* |
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* Read the next element as a signed int. |
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* 0 is success, < 0 is failure. |
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*/ |
|
|
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static int |
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ebml_read_sint (MatroskaDemuxContext *matroska, |
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uint32_t *id, |
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int64_t *num) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
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int size, n = 1, negative = 0, res; |
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uint64_t rlength; |
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|
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if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
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(res = ebml_read_element_length(matroska, &rlength)) < 0) |
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return res; |
|
size = rlength; |
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if (size < 1 || size > 8) { |
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offset_t pos = url_ftell(pb); |
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av_log(matroska->ctx, AV_LOG_ERROR, |
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"Invalid sint element size %d at position %"PRId64" (0x%"PRIx64")\n", |
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size, pos, pos); |
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return AVERROR_INVALIDDATA; |
|
} |
|
if ((*num = get_byte(pb)) & 0x80) { |
|
negative = 1; |
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*num &= ~0x80; |
|
} |
|
while (n++ < size) |
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*num = (*num << 8) | get_byte(pb); |
|
|
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/* make signed */ |
|
if (negative) |
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*num = *num - (1LL << ((8 * size) - 1)); |
|
|
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return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as a float. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
|
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static int |
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ebml_read_float (MatroskaDemuxContext *matroska, |
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uint32_t *id, |
|
double *num) |
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{ |
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ByteIOContext *pb = matroska->ctx->pb; |
|
int size, res; |
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uint64_t rlength; |
|
|
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if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
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(res = ebml_read_element_length(matroska, &rlength)) < 0) |
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return res; |
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size = rlength; |
|
|
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if (size == 4) { |
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*num= av_int2flt(get_be32(pb)); |
|
} else if(size==8){ |
|
*num= av_int2dbl(get_be64(pb)); |
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} else{ |
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offset_t pos = url_ftell(pb); |
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av_log(matroska->ctx, AV_LOG_ERROR, |
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"Invalid float element size %d at position %"PRIu64" (0x%"PRIx64")\n", |
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size, pos, pos); |
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return AVERROR_INVALIDDATA; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as an ASCII string. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
|
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static int |
|
ebml_read_ascii (MatroskaDemuxContext *matroska, |
|
uint32_t *id, |
|
char **str) |
|
{ |
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ByteIOContext *pb = matroska->ctx->pb; |
|
int size, res; |
|
uint64_t rlength; |
|
|
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if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
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(res = ebml_read_element_length(matroska, &rlength)) < 0) |
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return res; |
|
size = rlength; |
|
|
|
/* ebml strings are usually not 0-terminated, so we allocate one |
|
* byte more, read the string and NULL-terminate it ourselves. */ |
|
if (size < 0 || !(*str = av_malloc(size + 1))) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "Memory allocation failed\n"); |
|
return AVERROR(ENOMEM); |
|
} |
|
if (get_buffer(pb, (uint8_t *) *str, size) != size) { |
|
offset_t pos = url_ftell(pb); |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); |
|
return AVERROR(EIO); |
|
} |
|
(*str)[size] = '\0'; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as a UTF-8 string. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
|
|
static int |
|
ebml_read_utf8 (MatroskaDemuxContext *matroska, |
|
uint32_t *id, |
|
char **str) |
|
{ |
|
return ebml_read_ascii(matroska, id, str); |
|
} |
|
|
|
/* |
|
* Read the next element as a date (nanoseconds since 1/1/2000). |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
|
|
static int |
|
ebml_read_date (MatroskaDemuxContext *matroska, |
|
uint32_t *id, |
|
int64_t *date) |
|
{ |
|
return ebml_read_sint(matroska, id, date); |
|
} |
|
|
|
/* |
|
* 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, |
|
uint32_t *id) |
|
{ |
|
ByteIOContext *pb = matroska->ctx->pb; |
|
uint64_t length; |
|
MatroskaLevel *level; |
|
int res; |
|
|
|
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
|
(res = ebml_read_element_length(matroska, &length)) < 0) |
|
return res; |
|
|
|
/* protect... (Heaven forbids that the '>' is true) */ |
|
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); |
|
} |
|
|
|
/* remember level */ |
|
level = &matroska->levels[matroska->num_levels++]; |
|
level->start = url_ftell(pb); |
|
level->length = length; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read the next element as binary data. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
|
|
static int |
|
ebml_read_binary (MatroskaDemuxContext *matroska, |
|
uint32_t *id, |
|
uint8_t **binary, |
|
int *size) |
|
{ |
|
ByteIOContext *pb = matroska->ctx->pb; |
|
uint64_t rlength; |
|
int res; |
|
|
|
if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || |
|
(res = ebml_read_element_length(matroska, &rlength)) < 0) |
|
return res; |
|
*size = rlength; |
|
|
|
if (!(*binary = av_malloc(*size))) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Memory allocation error\n"); |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
if (get_buffer(pb, *binary, *size) != *size) { |
|
offset_t pos = url_ftell(pb); |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); |
|
return AVERROR(EIO); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Read signed/unsigned "EBML" numbers. |
|
* Return: number of bytes processed, < 0 on error. |
|
* XXX: use ebml_read_num(). |
|
*/ |
|
|
|
static int |
|
matroska_ebmlnum_uint (uint8_t *data, |
|
uint32_t size, |
|
uint64_t *num) |
|
{ |
|
int len_mask = 0x80, read = 1, n = 1, num_ffs = 0; |
|
uint64_t total; |
|
|
|
if (size <= 0) |
|
return AVERROR_INVALIDDATA; |
|
|
|
total = data[0]; |
|
while (read <= 8 && !(total & len_mask)) { |
|
read++; |
|
len_mask >>= 1; |
|
} |
|
if (read > 8) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if ((total &= (len_mask - 1)) == len_mask - 1) |
|
num_ffs++; |
|
if (size < read) |
|
return AVERROR_INVALIDDATA; |
|
while (n < read) { |
|
if (data[n] == 0xff) |
|
num_ffs++; |
|
total = (total << 8) | data[n]; |
|
n++; |
|
} |
|
|
|
if (read == num_ffs) |
|
*num = (uint64_t)-1; |
|
else |
|
*num = total; |
|
|
|
return read; |
|
} |
|
|
|
/* |
|
* Same as above, but signed. |
|
*/ |
|
|
|
static int |
|
matroska_ebmlnum_sint (uint8_t *data, |
|
uint32_t size, |
|
int64_t *num) |
|
{ |
|
uint64_t unum; |
|
int res; |
|
|
|
/* read as unsigned number first */ |
|
if ((res = matroska_ebmlnum_uint(data, size, &unum)) < 0) |
|
return res; |
|
|
|
/* make signed (weird way) */ |
|
if (unum == (uint64_t)-1) |
|
*num = INT64_MAX; |
|
else |
|
*num = unum - ((1LL << ((7 * res) - 1)) - 1); |
|
|
|
return res; |
|
} |
|
|
|
/* |
|
* Read an EBML header. |
|
* 0 is success, < 0 is failure. |
|
*/ |
|
|
|
static int |
|
ebml_read_header (MatroskaDemuxContext *matroska, |
|
char **doctype, |
|
int *version) |
|
{ |
|
uint32_t id; |
|
int level_up, res = 0; |
|
|
|
/* default init */ |
|
if (doctype) |
|
*doctype = NULL; |
|
if (version) |
|
*version = 1; |
|
|
|
if (!(id = ebml_peek_id(matroska, &level_up)) || |
|
level_up != 0 || id != EBML_ID_HEADER) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"This is not an EBML file (id=0x%x/0x%x)\n", id, EBML_ID_HEADER); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
return res; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &level_up))) |
|
return AVERROR(EIO); |
|
|
|
/* end-of-header */ |
|
if (level_up) |
|
break; |
|
|
|
switch (id) { |
|
/* is our read version uptodate? */ |
|
case EBML_ID_EBMLREADVERSION: { |
|
uint64_t num; |
|
|
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
return res; |
|
if (num > EBML_VERSION) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"EBML version %"PRIu64" (> %d) is not supported\n", |
|
num, EBML_VERSION); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
break; |
|
} |
|
|
|
/* we only handle 8 byte lengths at max */ |
|
case EBML_ID_EBMLMAXSIZELENGTH: { |
|
uint64_t num; |
|
|
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
return res; |
|
if (num > sizeof(uint64_t)) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Integers of size %"PRIu64" (> %zd) not supported\n", |
|
num, sizeof(uint64_t)); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
break; |
|
} |
|
|
|
/* we handle 4 byte IDs at max */ |
|
case EBML_ID_EBMLMAXIDLENGTH: { |
|
uint64_t num; |
|
|
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
return res; |
|
if (num > sizeof(uint32_t)) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"IDs of size %"PRIu64" (> %zu) not supported\n", |
|
num, sizeof(uint32_t)); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
break; |
|
} |
|
|
|
case EBML_ID_DOCTYPE: { |
|
char *text; |
|
|
|
if ((res = ebml_read_ascii(matroska, &id, &text)) < 0) |
|
return res; |
|
if (doctype) { |
|
if (*doctype) |
|
av_free(*doctype); |
|
*doctype = text; |
|
} else |
|
av_free(text); |
|
break; |
|
} |
|
|
|
case EBML_ID_DOCTYPEREADVERSION: { |
|
uint64_t num; |
|
|
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
return res; |
|
if (version) |
|
*version = num; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown data type 0x%x in EBML header", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
/* we ignore these two, as they don't tell us anything we |
|
* care about */ |
|
case EBML_ID_EBMLVERSION: |
|
case EBML_ID_DOCTYPEVERSION: |
|
res = ebml_read_skip (matroska); |
|
break; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static int |
|
matroska_find_track_by_num (MatroskaDemuxContext *matroska, |
|
int num) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < matroska->num_tracks; i++) |
|
if (matroska->tracks[i]->num == num) |
|
return i; |
|
|
|
return -1; |
|
} |
|
|
|
|
|
/* |
|
* Put one packet in an application-supplied AVPacket struct. |
|
* Returns 0 on success or -1 on failure. |
|
*/ |
|
|
|
static int |
|
matroska_deliver_packet (MatroskaDemuxContext *matroska, |
|
AVPacket *pkt) |
|
{ |
|
if (matroska->num_packets > 0) { |
|
memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); |
|
av_free(matroska->packets[0]); |
|
if (matroska->num_packets > 1) { |
|
memmove(&matroska->packets[0], &matroska->packets[1], |
|
(matroska->num_packets - 1) * sizeof(AVPacket *)); |
|
matroska->packets = |
|
av_realloc(matroska->packets, (matroska->num_packets - 1) * |
|
sizeof(AVPacket *)); |
|
} else { |
|
av_freep(&matroska->packets); |
|
} |
|
matroska->num_packets--; |
|
return 0; |
|
} |
|
|
|
return -1; |
|
} |
|
|
|
/* |
|
* Put a packet into our internal queue. Will be delivered to the |
|
* user/application during the next get_packet() call. |
|
*/ |
|
|
|
static void |
|
matroska_queue_packet (MatroskaDemuxContext *matroska, |
|
AVPacket *pkt) |
|
{ |
|
matroska->packets = |
|
av_realloc(matroska->packets, (matroska->num_packets + 1) * |
|
sizeof(AVPacket *)); |
|
matroska->packets[matroska->num_packets] = pkt; |
|
matroska->num_packets++; |
|
} |
|
|
|
/* |
|
* Free all packets in our internal queue. |
|
*/ |
|
static void |
|
matroska_clear_queue (MatroskaDemuxContext *matroska) |
|
{ |
|
if (matroska->packets) { |
|
int n; |
|
for (n = 0; n < matroska->num_packets; n++) { |
|
av_free_packet(matroska->packets[n]); |
|
av_free(matroska->packets[n]); |
|
} |
|
av_free(matroska->packets); |
|
matroska->packets = NULL; |
|
matroska->num_packets = 0; |
|
} |
|
} |
|
|
|
|
|
/* |
|
* Autodetecting... |
|
*/ |
|
|
|
static int |
|
matroska_probe (AVProbeData *p) |
|
{ |
|
uint64_t total = 0; |
|
int len_mask = 0x80, size = 1, n = 1; |
|
uint8_t probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' }; |
|
|
|
/* ebml header? */ |
|
if (AV_RB32(p->buf) != EBML_ID_HEADER) |
|
return 0; |
|
|
|
/* length of header */ |
|
total = p->buf[4]; |
|
while (size <= 8 && !(total & len_mask)) { |
|
size++; |
|
len_mask >>= 1; |
|
} |
|
if (size > 8) |
|
return 0; |
|
total &= (len_mask - 1); |
|
while (n < size) |
|
total = (total << 8) | p->buf[4 + n++]; |
|
|
|
/* does the probe data contain the whole header? */ |
|
if (p->buf_size < 4 + size + total) |
|
return 0; |
|
|
|
/* the header must contain the document type 'matroska'. For now, |
|
* we don't parse the whole header but simply check for the |
|
* availability of that array of characters inside the header. |
|
* Not fully fool-proof, but good enough. */ |
|
for (n = 4 + size; n <= 4 + size + total - sizeof(probe_data); n++) |
|
if (!memcmp (&p->buf[n], probe_data, sizeof(probe_data))) |
|
return AVPROBE_SCORE_MAX; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* From here on, it's all XML-style DTD stuff... Needs no comments. |
|
*/ |
|
|
|
static int |
|
matroska_parse_info (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "Parsing info...\n"); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* cluster timecode */ |
|
case MATROSKA_ID_TIMECODESCALE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
matroska->time_scale = num; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_DURATION: { |
|
double num; |
|
if ((res = ebml_read_float(matroska, &id, &num)) < 0) |
|
break; |
|
matroska->ctx->duration = num * matroska->time_scale * 1000 / AV_TIME_BASE; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_TITLE: { |
|
char *text; |
|
if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) |
|
break; |
|
strncpy(matroska->ctx->title, text, |
|
sizeof(matroska->ctx->title)-1); |
|
av_free(text); |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_WRITINGAPP: { |
|
char *text; |
|
if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) |
|
break; |
|
matroska->writing_app = text; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_MUXINGAPP: { |
|
char *text; |
|
if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) |
|
break; |
|
matroska->muxing_app = text; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_DATEUTC: { |
|
int64_t time; |
|
if ((res = ebml_read_date(matroska, &id, &time)) < 0) |
|
break; |
|
matroska->created = time; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in info header\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_add_stream (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
MatroskaTrack *track; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "parsing track, adding stream..,\n"); |
|
|
|
/* Allocate a generic track. As soon as we know its type we'll realloc. */ |
|
track = av_mallocz(MAX_TRACK_SIZE); |
|
matroska->num_tracks++; |
|
strcpy(track->language, "eng"); |
|
|
|
/* start with the master */ |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
return res; |
|
|
|
/* try reading the trackentry headers */ |
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up > 0) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* track number (unique stream ID) */ |
|
case MATROSKA_ID_TRACKNUMBER: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
track->num = num; |
|
break; |
|
} |
|
|
|
/* track UID (unique identifier) */ |
|
case MATROSKA_ID_TRACKUID: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
track->uid = num; |
|
break; |
|
} |
|
|
|
/* track type (video, audio, combined, subtitle, etc.) */ |
|
case MATROSKA_ID_TRACKTYPE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
if (track->type && track->type != num) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"More than one tracktype in an entry - skip\n"); |
|
break; |
|
} |
|
track->type = num; |
|
|
|
switch (track->type) { |
|
case MATROSKA_TRACK_TYPE_VIDEO: |
|
case MATROSKA_TRACK_TYPE_AUDIO: |
|
case MATROSKA_TRACK_TYPE_SUBTITLE: |
|
break; |
|
case MATROSKA_TRACK_TYPE_COMPLEX: |
|
case MATROSKA_TRACK_TYPE_LOGO: |
|
case MATROSKA_TRACK_TYPE_CONTROL: |
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown or unsupported track type 0x%x\n", |
|
track->type); |
|
track->type = MATROSKA_TRACK_TYPE_NONE; |
|
break; |
|
} |
|
matroska->tracks[matroska->num_tracks - 1] = track; |
|
break; |
|
} |
|
|
|
/* tracktype specific stuff for video */ |
|
case MATROSKA_ID_TRACKVIDEO: { |
|
MatroskaVideoTrack *videotrack; |
|
if (!track->type) |
|
track->type = MATROSKA_TRACK_TYPE_VIDEO; |
|
if (track->type != MATROSKA_TRACK_TYPE_VIDEO) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"video data in non-video track - ignoring\n"); |
|
res = AVERROR_INVALIDDATA; |
|
break; |
|
} else if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
videotrack = (MatroskaVideoTrack *)track; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up > 0) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* fixme, this should be one-up, but I get it here */ |
|
case MATROSKA_ID_TRACKDEFAULTDURATION: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint (matroska, &id, |
|
&num)) < 0) |
|
break; |
|
track->default_duration = num; |
|
break; |
|
} |
|
|
|
/* video framerate */ |
|
case MATROSKA_ID_VIDEOFRAMERATE: { |
|
double num; |
|
if ((res = ebml_read_float(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
if (!track->default_duration) |
|
track->default_duration = 1000000000/num; |
|
break; |
|
} |
|
|
|
/* width of the size to display the video at */ |
|
case MATROSKA_ID_VIDEODISPLAYWIDTH: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
videotrack->display_width = num; |
|
break; |
|
} |
|
|
|
/* height of the size to display the video at */ |
|
case MATROSKA_ID_VIDEODISPLAYHEIGHT: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
videotrack->display_height = num; |
|
break; |
|
} |
|
|
|
/* width of the video in the file */ |
|
case MATROSKA_ID_VIDEOPIXELWIDTH: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
videotrack->pixel_width = num; |
|
break; |
|
} |
|
|
|
/* height of the video in the file */ |
|
case MATROSKA_ID_VIDEOPIXELHEIGHT: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
videotrack->pixel_height = num; |
|
break; |
|
} |
|
|
|
/* whether the video is interlaced */ |
|
case MATROSKA_ID_VIDEOFLAGINTERLACED: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
if (num) |
|
track->flags |= |
|
MATROSKA_VIDEOTRACK_INTERLACED; |
|
else |
|
track->flags &= |
|
~MATROSKA_VIDEOTRACK_INTERLACED; |
|
break; |
|
} |
|
|
|
/* stereo mode (whether the video has two streams, |
|
* where one is for the left eye and the other for |
|
* the right eye, which creates a 3D-like |
|
* effect) */ |
|
case MATROSKA_ID_VIDEOSTEREOMODE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
if (num != MATROSKA_EYE_MODE_MONO && |
|
num != MATROSKA_EYE_MODE_LEFT && |
|
num != MATROSKA_EYE_MODE_RIGHT && |
|
num != MATROSKA_EYE_MODE_BOTH) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Ignoring unknown eye mode 0x%x\n", |
|
(uint32_t) num); |
|
break; |
|
} |
|
videotrack->eye_mode = num; |
|
break; |
|
} |
|
|
|
/* aspect ratio behaviour */ |
|
case MATROSKA_ID_VIDEOASPECTRATIO: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
if (num != MATROSKA_ASPECT_RATIO_MODE_FREE && |
|
num != MATROSKA_ASPECT_RATIO_MODE_KEEP && |
|
num != MATROSKA_ASPECT_RATIO_MODE_FIXED) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Ignoring unknown aspect ratio 0x%x\n", |
|
(uint32_t) num); |
|
break; |
|
} |
|
videotrack->ar_mode = num; |
|
break; |
|
} |
|
|
|
/* colorspace (only matters for raw video) |
|
* fourcc */ |
|
case MATROSKA_ID_VIDEOCOLORSPACE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
videotrack->fourcc = num; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown video track header entry " |
|
"0x%x - ignoring\n", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
break; |
|
} |
|
|
|
/* tracktype specific stuff for audio */ |
|
case MATROSKA_ID_TRACKAUDIO: { |
|
MatroskaAudioTrack *audiotrack; |
|
if (!track->type) |
|
track->type = MATROSKA_TRACK_TYPE_AUDIO; |
|
if (track->type != MATROSKA_TRACK_TYPE_AUDIO) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"audio data in non-audio track - ignoring\n"); |
|
res = AVERROR_INVALIDDATA; |
|
break; |
|
} else if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
audiotrack = (MatroskaAudioTrack *)track; |
|
audiotrack->channels = 1; |
|
audiotrack->samplerate = 8000; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up > 0) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* samplerate */ |
|
case MATROSKA_ID_AUDIOSAMPLINGFREQ: { |
|
double num; |
|
if ((res = ebml_read_float(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
audiotrack->internal_samplerate = |
|
audiotrack->samplerate = num; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_AUDIOOUTSAMPLINGFREQ: { |
|
double num; |
|
if ((res = ebml_read_float(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
audiotrack->samplerate = num; |
|
break; |
|
} |
|
|
|
/* bitdepth */ |
|
case MATROSKA_ID_AUDIOBITDEPTH: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
audiotrack->bitdepth = num; |
|
break; |
|
} |
|
|
|
/* channels */ |
|
case MATROSKA_ID_AUDIOCHANNELS: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&num)) < 0) |
|
break; |
|
audiotrack->channels = num; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown audio track header entry " |
|
"0x%x - ignoring\n", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
break; |
|
} |
|
|
|
/* codec identifier */ |
|
case MATROSKA_ID_CODECID: { |
|
char *text; |
|
if ((res = ebml_read_ascii(matroska, &id, &text)) < 0) |
|
break; |
|
track->codec_id = text; |
|
break; |
|
} |
|
|
|
/* codec private data */ |
|
case MATROSKA_ID_CODECPRIVATE: { |
|
uint8_t *data; |
|
int size; |
|
if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0)) |
|
break; |
|
track->codec_priv = data; |
|
track->codec_priv_size = size; |
|
break; |
|
} |
|
|
|
/* name of the codec */ |
|
case MATROSKA_ID_CODECNAME: { |
|
char *text; |
|
if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) |
|
break; |
|
track->codec_name = text; |
|
break; |
|
} |
|
|
|
/* name of this track */ |
|
case MATROSKA_ID_TRACKNAME: { |
|
char *text; |
|
if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) |
|
break; |
|
track->name = text; |
|
break; |
|
} |
|
|
|
/* language (matters for audio/subtitles, mostly) */ |
|
case MATROSKA_ID_TRACKLANGUAGE: { |
|
char *text, *end; |
|
if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) |
|
break; |
|
if ((end = strchr(text, '-'))) |
|
*end = '\0'; |
|
if (strlen(text) == 3) |
|
strcpy(track->language, text); |
|
av_free(text); |
|
break; |
|
} |
|
|
|
/* whether this is actually used */ |
|
case MATROSKA_ID_TRACKFLAGENABLED: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
if (num) |
|
track->flags |= MATROSKA_TRACK_ENABLED; |
|
else |
|
track->flags &= ~MATROSKA_TRACK_ENABLED; |
|
break; |
|
} |
|
|
|
/* whether it's the default for this track type */ |
|
case MATROSKA_ID_TRACKFLAGDEFAULT: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
if (num) |
|
track->flags |= MATROSKA_TRACK_DEFAULT; |
|
else |
|
track->flags &= ~MATROSKA_TRACK_DEFAULT; |
|
break; |
|
} |
|
|
|
/* lacing (like MPEG, where blocks don't end/start on frame |
|
* boundaries) */ |
|
case MATROSKA_ID_TRACKFLAGLACING: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
if (num) |
|
track->flags |= MATROSKA_TRACK_LACING; |
|
else |
|
track->flags &= ~MATROSKA_TRACK_LACING; |
|
break; |
|
} |
|
|
|
/* default length (in time) of one data block in this track */ |
|
case MATROSKA_ID_TRACKDEFAULTDURATION: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
track->default_duration = num; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_TRACKCONTENTENCODINGS: { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up > 0) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_TRACKCONTENTENCODING: { |
|
int encoding_scope = 1; |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up > 0) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_ENCODINGSCOPE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
encoding_scope = num; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_ENCODINGTYPE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
if (num) |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Unsupported encoding type"); |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_ENCODINGCOMPRESSION: { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up > 0) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_ENCODINGCOMPALGO: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
if (num != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && |
|
#ifdef CONFIG_ZLIB |
|
num != MATROSKA_TRACK_ENCODING_COMP_ZLIB && |
|
#endif |
|
#ifdef CONFIG_BZLIB |
|
num != MATROSKA_TRACK_ENCODING_COMP_BZLIB && |
|
#endif |
|
num != MATROSKA_TRACK_ENCODING_COMP_LZO) |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Unsupported compression algo\n"); |
|
track->encoding_algo = num; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_ENCODINGCOMPSETTINGS: { |
|
uint8_t *data; |
|
int size; |
|
if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0)) |
|
break; |
|
track->encoding_settings = data; |
|
track->encoding_settings_len = size; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown compression header entry " |
|
"0x%x - ignoring\n", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown content encoding header entry " |
|
"0x%x - ignoring\n", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
track->encoding_scope = encoding_scope; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown content encodings header entry " |
|
"0x%x - ignoring\n", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown track header entry 0x%x - ignoring\n", id); |
|
/* pass-through */ |
|
|
|
case EBML_ID_VOID: |
|
/* we ignore these because they're nothing useful. */ |
|
case MATROSKA_ID_CODECINFOURL: |
|
case MATROSKA_ID_CODECDOWNLOADURL: |
|
case MATROSKA_ID_TRACKMINCACHE: |
|
case MATROSKA_ID_TRACKMAXCACHE: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_tracks (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "parsing tracks...\n"); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* one track within the "all-tracks" header */ |
|
case MATROSKA_ID_TRACKENTRY: |
|
res = matroska_add_stream(matroska); |
|
break; |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in track header\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_index (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
MatroskaDemuxIndex idx; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "parsing index...\n"); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* one single index entry ('point') */ |
|
case MATROSKA_ID_POINTENTRY: |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
/* in the end, we hope to fill one entry with a |
|
* timestamp, a file position and a tracknum */ |
|
idx.pos = (uint64_t) -1; |
|
idx.time = (uint64_t) -1; |
|
idx.track = (uint16_t) -1; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* one single index entry ('point') */ |
|
case MATROSKA_ID_CUETIME: { |
|
uint64_t time; |
|
if ((res = ebml_read_uint(matroska, &id, |
|
&time)) < 0) |
|
break; |
|
idx.time = time * matroska->time_scale; |
|
break; |
|
} |
|
|
|
/* position in the file + track to which it |
|
* belongs */ |
|
case MATROSKA_ID_CUETRACKPOSITION: |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id (matroska, |
|
&matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* track number */ |
|
case MATROSKA_ID_CUETRACK: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, |
|
&id, &num)) < 0) |
|
break; |
|
idx.track = num; |
|
break; |
|
} |
|
|
|
/* position in file */ |
|
case MATROSKA_ID_CUECLUSTERPOSITION: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, |
|
&id, &num)) < 0) |
|
break; |
|
idx.pos = num+matroska->segment_start; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in " |
|
"CuesTrackPositions\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
break; |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in cuespoint " |
|
"index\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
/* so let's see if we got what we wanted */ |
|
if (idx.pos != (uint64_t) -1 && |
|
idx.time != (uint64_t) -1 && |
|
idx.track != (uint16_t) -1) { |
|
if (matroska->num_indexes % 32 == 0) { |
|
/* re-allocate bigger index */ |
|
matroska->index = |
|
av_realloc(matroska->index, |
|
(matroska->num_indexes + 32) * |
|
sizeof(MatroskaDemuxIndex)); |
|
} |
|
matroska->index[matroska->num_indexes] = idx; |
|
matroska->num_indexes++; |
|
} |
|
break; |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in cues header\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_metadata (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* Hm, this is unsupported... */ |
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in metadata header\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_seekhead (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "parsing seekhead...\n"); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_SEEKENTRY: { |
|
uint32_t seek_id = 0, peek_id_cache = 0; |
|
uint64_t seek_pos = (uint64_t) -1, t; |
|
|
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_SEEKID: |
|
res = ebml_read_uint(matroska, &id, &t); |
|
seek_id = t; |
|
break; |
|
|
|
case MATROSKA_ID_SEEKPOSITION: |
|
res = ebml_read_uint(matroska, &id, &seek_pos); |
|
break; |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown seekhead ID 0x%x\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
if (!seek_id || seek_pos == (uint64_t) -1) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Incomplete seekhead entry (0x%x/%"PRIu64")\n", |
|
seek_id, seek_pos); |
|
break; |
|
} |
|
|
|
switch (seek_id) { |
|
case MATROSKA_ID_CUES: |
|
case MATROSKA_ID_TAGS: { |
|
uint32_t level_up = matroska->level_up; |
|
offset_t before_pos; |
|
uint64_t length; |
|
MatroskaLevel level; |
|
|
|
/* remember the peeked ID and the current position */ |
|
peek_id_cache = matroska->peek_id; |
|
before_pos = url_ftell(matroska->ctx->pb); |
|
|
|
/* seek */ |
|
if ((res = ebml_read_seek(matroska, seek_pos + |
|
matroska->segment_start)) < 0) |
|
goto finish; |
|
|
|
/* 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); |
|
return AVERROR_UNKNOWN; |
|
} |
|
|
|
level.start = 0; |
|
level.length = (uint64_t)-1; |
|
matroska->levels[matroska->num_levels] = level; |
|
matroska->num_levels++; |
|
|
|
/* check ID */ |
|
if (!(id = ebml_peek_id (matroska, |
|
&matroska->level_up))) |
|
goto finish; |
|
if (id != seek_id) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"We looked for ID=0x%x but got " |
|
"ID=0x%x (pos=%"PRIu64")", |
|
seek_id, id, seek_pos + |
|
matroska->segment_start); |
|
goto finish; |
|
} |
|
|
|
/* read master + parse */ |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
goto finish; |
|
switch (id) { |
|
case MATROSKA_ID_CUES: |
|
if (!(res = matroska_parse_index(matroska)) || |
|
url_feof(matroska->ctx->pb)) { |
|
matroska->index_parsed = 1; |
|
res = 0; |
|
} |
|
break; |
|
case MATROSKA_ID_TAGS: |
|
if (!(res = matroska_parse_metadata(matroska)) || |
|
url_feof(matroska->ctx->pb)) { |
|
matroska->metadata_parsed = 1; |
|
res = 0; |
|
} |
|
break; |
|
} |
|
|
|
finish: |
|
/* remove dummy level */ |
|
while (matroska->num_levels) { |
|
matroska->num_levels--; |
|
length = |
|
matroska->levels[matroska->num_levels].length; |
|
if (length == (uint64_t)-1) |
|
break; |
|
} |
|
|
|
/* seek back */ |
|
if ((res = ebml_read_seek(matroska, before_pos)) < 0) |
|
return res; |
|
matroska->peek_id = peek_id_cache; |
|
matroska->level_up = level_up; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Ignoring seekhead entry for ID=0x%x\n", |
|
seek_id); |
|
break; |
|
} |
|
|
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown seekhead ID 0x%x\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_attachments(AVFormatContext *s) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
int res = 0; |
|
uint32_t id; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "parsing attachments...\n"); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_ATTACHEDFILE: { |
|
char* name = NULL; |
|
char* mime = NULL; |
|
uint8_t* data = NULL; |
|
int i, data_size = 0; |
|
AVStream *st; |
|
|
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_FILENAME: |
|
res = ebml_read_utf8 (matroska, &id, &name); |
|
break; |
|
|
|
case MATROSKA_ID_FILEMIMETYPE: |
|
res = ebml_read_ascii (matroska, &id, &mime); |
|
break; |
|
|
|
case MATROSKA_ID_FILEDATA: |
|
res = ebml_read_binary(matroska, &id, &data, &data_size); |
|
break; |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown attachedfile ID 0x%x\n", id); |
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
if (!(name && mime && data && data_size > 0)) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); |
|
break; |
|
} |
|
|
|
st = av_new_stream(s, matroska->num_streams++); |
|
if (st == NULL) |
|
return AVERROR(ENOMEM); |
|
st->filename = av_strdup(name); |
|
st->codec->codec_id = CODEC_ID_NONE; |
|
st->codec->codec_type = CODEC_TYPE_ATTACHMENT; |
|
st->codec->extradata = av_malloc(data_size); |
|
if(st->codec->extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
st->codec->extradata_size = data_size; |
|
memcpy(st->codec->extradata, data, data_size); |
|
|
|
for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { |
|
if (!strncmp(ff_mkv_mime_tags[i].str, mime, |
|
strlen(ff_mkv_mime_tags[i].str))) { |
|
st->codec->codec_id = ff_mkv_mime_tags[i].id; |
|
break; |
|
} |
|
} |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "new attachment: %s, %s, size %d \n", name, mime, data_size); |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown attachments ID 0x%x\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x)) |
|
|
|
static int |
|
matroska_aac_profile (char *codec_id) |
|
{ |
|
static const char *aac_profiles[] = { |
|
"MAIN", "LC", "SSR" |
|
}; |
|
int profile; |
|
|
|
for (profile=0; profile<ARRAY_SIZE(aac_profiles); profile++) |
|
if (strstr(codec_id, aac_profiles[profile])) |
|
break; |
|
return profile + 1; |
|
} |
|
|
|
static int |
|
matroska_aac_sri (int samplerate) |
|
{ |
|
int sri; |
|
|
|
for (sri=0; sri<ARRAY_SIZE(ff_mpeg4audio_sample_rates); sri++) |
|
if (ff_mpeg4audio_sample_rates[sri] == samplerate) |
|
break; |
|
return sri; |
|
} |
|
|
|
static int |
|
matroska_read_header (AVFormatContext *s, |
|
AVFormatParameters *ap) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
char *doctype; |
|
int version, last_level, res = 0; |
|
uint32_t id; |
|
|
|
matroska->ctx = s; |
|
|
|
/* First read the EBML header. */ |
|
doctype = NULL; |
|
if ((res = ebml_read_header(matroska, &doctype, &version)) < 0) |
|
return res; |
|
if ((doctype == NULL) || strcmp(doctype, "matroska")) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Wrong EBML doctype ('%s' != 'matroska').\n", |
|
doctype ? doctype : "(none)"); |
|
if (doctype) |
|
av_free(doctype); |
|
return AVERROR_NOFMT; |
|
} |
|
av_free(doctype); |
|
if (version > 2) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, |
|
"Matroska demuxer version 2 too old for file version %d\n", |
|
version); |
|
return AVERROR_NOFMT; |
|
} |
|
|
|
/* The next thing is a segment. */ |
|
while (1) { |
|
if (!(id = ebml_peek_id(matroska, &last_level))) |
|
return AVERROR(EIO); |
|
if (id == MATROSKA_ID_SEGMENT) |
|
break; |
|
|
|
/* oi! */ |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Expected a Segment ID (0x%x), but received 0x%x!\n", |
|
MATROSKA_ID_SEGMENT, id); |
|
if ((res = ebml_read_skip(matroska)) < 0) |
|
return res; |
|
} |
|
|
|
/* We now have a Matroska segment. |
|
* Seeks are from the beginning of the segment, |
|
* after the segment ID/length. */ |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
return res; |
|
matroska->segment_start = url_ftell(s->pb); |
|
|
|
matroska->time_scale = 1000000; |
|
/* we've found our segment, start reading the different contents in here */ |
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* stream info */ |
|
case MATROSKA_ID_INFO: { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_info(matroska); |
|
break; |
|
} |
|
|
|
/* track info headers */ |
|
case MATROSKA_ID_TRACKS: { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_tracks(matroska); |
|
break; |
|
} |
|
|
|
/* stream index */ |
|
case MATROSKA_ID_CUES: { |
|
if (!matroska->index_parsed) { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_index(matroska); |
|
} else |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
/* metadata */ |
|
case MATROSKA_ID_TAGS: { |
|
if (!matroska->metadata_parsed) { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_metadata(matroska); |
|
} else |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
/* file index (if seekable, seek to Cues/Tags to parse it) */ |
|
case MATROSKA_ID_SEEKHEAD: { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_seekhead(matroska); |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_ATTACHMENTS: { |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_attachments(s); |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_CLUSTER: { |
|
/* Do not read the master - this will be done in the next |
|
* call to matroska_read_packet. */ |
|
res = 1; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown matroska file header ID 0x%x\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
/* Have we found a cluster? */ |
|
if (ebml_peek_id(matroska, NULL) == MATROSKA_ID_CLUSTER) { |
|
int i, j; |
|
MatroskaTrack *track; |
|
AVStream *st; |
|
|
|
for (i = 0; i < matroska->num_tracks; i++) { |
|
enum CodecID codec_id = CODEC_ID_NONE; |
|
uint8_t *extradata = NULL; |
|
int extradata_size = 0; |
|
int extradata_offset = 0; |
|
track = matroska->tracks[i]; |
|
track->stream_index = -1; |
|
|
|
/* Apply some sanity checks. */ |
|
if (track->codec_id == NULL) |
|
continue; |
|
|
|
for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ |
|
if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, |
|
strlen(ff_mkv_codec_tags[j].str))){ |
|
codec_id= ff_mkv_codec_tags[j].id; |
|
break; |
|
} |
|
} |
|
|
|
/* Set the FourCC from the CodecID. */ |
|
/* This is the MS compatibility mode which stores a |
|
* BITMAPINFOHEADER in the CodecPrivate. */ |
|
if (!strcmp(track->codec_id, |
|
MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC) && |
|
(track->codec_priv_size >= 40) && |
|
(track->codec_priv != NULL)) { |
|
MatroskaVideoTrack *vtrack = (MatroskaVideoTrack *) track; |
|
|
|
/* Offset of biCompression. Stored in LE. */ |
|
vtrack->fourcc = AV_RL32(track->codec_priv + 16); |
|
codec_id = codec_get_id(codec_bmp_tags, vtrack->fourcc); |
|
|
|
} |
|
|
|
/* This is the MS compatibility mode which stores a |
|
* WAVEFORMATEX in the CodecPrivate. */ |
|
else if (!strcmp(track->codec_id, |
|
MATROSKA_CODEC_ID_AUDIO_ACM) && |
|
(track->codec_priv_size >= 18) && |
|
(track->codec_priv != NULL)) { |
|
uint16_t tag; |
|
|
|
/* Offset of wFormatTag. Stored in LE. */ |
|
tag = AV_RL16(track->codec_priv); |
|
codec_id = codec_get_id(codec_wav_tags, tag); |
|
|
|
} |
|
|
|
else if (codec_id == CODEC_ID_AAC && !track->codec_priv_size) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track; |
|
int profile = matroska_aac_profile(track->codec_id); |
|
int sri = matroska_aac_sri(audiotrack->internal_samplerate); |
|
extradata = av_malloc(5); |
|
if (extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); |
|
extradata[1] = ((sri&0x01) << 7) | (audiotrack->channels<<3); |
|
if (strstr(track->codec_id, "SBR")) { |
|
sri = matroska_aac_sri(audiotrack->samplerate); |
|
extradata[2] = 0x56; |
|
extradata[3] = 0xE5; |
|
extradata[4] = 0x80 | (sri<<3); |
|
extradata_size = 5; |
|
} else { |
|
extradata_size = 2; |
|
} |
|
} |
|
|
|
else if (codec_id == CODEC_ID_TTA) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track; |
|
ByteIOContext b; |
|
extradata_size = 30; |
|
extradata = av_mallocz(extradata_size); |
|
if (extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
init_put_byte(&b, extradata, extradata_size, 1, |
|
NULL, NULL, NULL, NULL); |
|
put_buffer(&b, "TTA1", 4); |
|
put_le16(&b, 1); |
|
put_le16(&b, audiotrack->channels); |
|
put_le16(&b, audiotrack->bitdepth); |
|
put_le32(&b, audiotrack->samplerate); |
|
put_le32(&b, matroska->ctx->duration * audiotrack->samplerate); |
|
} |
|
|
|
else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || |
|
codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { |
|
extradata_offset = 26; |
|
track->codec_priv_size -= extradata_offset; |
|
} |
|
|
|
else if (codec_id == CODEC_ID_RA_144) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; |
|
audiotrack->samplerate = 8000; |
|
audiotrack->channels = 1; |
|
} |
|
|
|
else if (codec_id == CODEC_ID_RA_288 || |
|
codec_id == CODEC_ID_COOK || |
|
codec_id == CODEC_ID_ATRAC3) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; |
|
ByteIOContext b; |
|
|
|
init_put_byte(&b, track->codec_priv, track->codec_priv_size, 0, |
|
NULL, NULL, NULL, NULL); |
|
url_fskip(&b, 24); |
|
audiotrack->coded_framesize = get_be32(&b); |
|
url_fskip(&b, 12); |
|
audiotrack->sub_packet_h = get_be16(&b); |
|
audiotrack->frame_size = get_be16(&b); |
|
audiotrack->sub_packet_size = get_be16(&b); |
|
audiotrack->buf = av_malloc(audiotrack->frame_size * audiotrack->sub_packet_h); |
|
if (codec_id == CODEC_ID_RA_288) { |
|
audiotrack->block_align = audiotrack->coded_framesize; |
|
track->codec_priv_size = 0; |
|
} else { |
|
audiotrack->block_align = audiotrack->sub_packet_size; |
|
extradata_offset = 78; |
|
track->codec_priv_size -= extradata_offset; |
|
} |
|
} |
|
|
|
if (codec_id == CODEC_ID_NONE) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown/unsupported CodecID %s.\n", |
|
track->codec_id); |
|
} |
|
|
|
track->stream_index = matroska->num_streams; |
|
|
|
matroska->num_streams++; |
|
st = av_new_stream(s, track->stream_index); |
|
if (st == NULL) |
|
return AVERROR(ENOMEM); |
|
av_set_pts_info(st, 64, matroska->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ |
|
|
|
st->codec->codec_id = codec_id; |
|
st->start_time = 0; |
|
if (strcmp(track->language, "und")) |
|
strcpy(st->language, track->language); |
|
|
|
if (track->flags & MATROSKA_TRACK_DEFAULT) |
|
st->disposition |= AV_DISPOSITION_DEFAULT; |
|
|
|
if (track->default_duration) |
|
av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, |
|
track->default_duration, 1000000000, 30000); |
|
|
|
if(extradata){ |
|
st->codec->extradata = extradata; |
|
st->codec->extradata_size = extradata_size; |
|
} else if(track->codec_priv && track->codec_priv_size > 0){ |
|
st->codec->extradata = av_malloc(track->codec_priv_size); |
|
if(st->codec->extradata == NULL) |
|
return AVERROR(ENOMEM); |
|
st->codec->extradata_size = track->codec_priv_size; |
|
memcpy(st->codec->extradata,track->codec_priv+extradata_offset, |
|
track->codec_priv_size); |
|
} |
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { |
|
MatroskaVideoTrack *videotrack = (MatroskaVideoTrack *)track; |
|
|
|
st->codec->codec_type = CODEC_TYPE_VIDEO; |
|
st->codec->codec_tag = videotrack->fourcc; |
|
st->codec->width = videotrack->pixel_width; |
|
st->codec->height = videotrack->pixel_height; |
|
if (videotrack->display_width == 0) |
|
videotrack->display_width= videotrack->pixel_width; |
|
if (videotrack->display_height == 0) |
|
videotrack->display_height= videotrack->pixel_height; |
|
av_reduce(&st->codec->sample_aspect_ratio.num, |
|
&st->codec->sample_aspect_ratio.den, |
|
st->codec->height * videotrack->display_width, |
|
st->codec-> width * videotrack->display_height, |
|
255); |
|
st->need_parsing = AVSTREAM_PARSE_HEADERS; |
|
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; |
|
|
|
st->codec->codec_type = CODEC_TYPE_AUDIO; |
|
st->codec->sample_rate = audiotrack->samplerate; |
|
st->codec->channels = audiotrack->channels; |
|
st->codec->block_align = audiotrack->block_align; |
|
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { |
|
st->codec->codec_type = CODEC_TYPE_SUBTITLE; |
|
} |
|
|
|
/* What do we do with private data? E.g. for Vorbis. */ |
|
} |
|
res = 0; |
|
} |
|
|
|
if (matroska->index_parsed) { |
|
int i, track, stream; |
|
for (i=0; i<matroska->num_indexes; i++) { |
|
MatroskaDemuxIndex *idx = &matroska->index[i]; |
|
track = matroska_find_track_by_num(matroska, idx->track); |
|
if (track < 0) continue; |
|
stream = matroska->tracks[track]->stream_index; |
|
if (stream >= 0 && stream < matroska->ctx->nb_streams) |
|
av_add_index_entry(matroska->ctx->streams[stream], |
|
idx->pos, idx->time/matroska->time_scale, |
|
0, 0, AVINDEX_KEYFRAME); |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, |
|
int64_t pos, uint64_t cluster_time, uint64_t duration, |
|
int is_keyframe, int is_bframe) |
|
{ |
|
int res = 0; |
|
int track; |
|
AVStream *st; |
|
AVPacket *pkt; |
|
uint8_t *origdata = data; |
|
int16_t block_time; |
|
uint32_t *lace_size = NULL; |
|
int n, flags, laces = 0; |
|
uint64_t num; |
|
int stream_index; |
|
|
|
/* first byte(s): tracknum */ |
|
if ((n = matroska_ebmlnum_uint(data, size, &num)) < 0) { |
|
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); |
|
av_free(origdata); |
|
return res; |
|
} |
|
data += n; |
|
size -= n; |
|
|
|
/* fetch track from num */ |
|
track = matroska_find_track_by_num(matroska, num); |
|
if (size <= 3 || track < 0 || track >= matroska->num_tracks) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Invalid stream %d or size %u\n", track, size); |
|
av_free(origdata); |
|
return res; |
|
} |
|
stream_index = matroska->tracks[track]->stream_index; |
|
if (stream_index < 0 || stream_index >= matroska->ctx->nb_streams) { |
|
av_free(origdata); |
|
return res; |
|
} |
|
st = matroska->ctx->streams[stream_index]; |
|
if (st->discard >= AVDISCARD_ALL) { |
|
av_free(origdata); |
|
return res; |
|
} |
|
if (duration == AV_NOPTS_VALUE) |
|
duration = matroska->tracks[track]->default_duration / matroska->time_scale; |
|
|
|
/* block_time (relative to cluster time) */ |
|
block_time = AV_RB16(data); |
|
data += 2; |
|
flags = *data++; |
|
size -= 3; |
|
if (is_keyframe == -1) |
|
is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0; |
|
|
|
if (matroska->skip_to_keyframe) { |
|
if (!is_keyframe || st != matroska->skip_to_stream) { |
|
av_free(origdata); |
|
return res; |
|
} |
|
matroska->skip_to_keyframe = 0; |
|
} |
|
|
|
switch ((flags & 0x06) >> 1) { |
|
case 0x0: /* no lacing */ |
|
laces = 1; |
|
lace_size = av_mallocz(sizeof(int)); |
|
lace_size[0] = size; |
|
break; |
|
|
|
case 0x1: /* xiph lacing */ |
|
case 0x2: /* fixed-size lacing */ |
|
case 0x3: /* EBML lacing */ |
|
if (size == 0) { |
|
res = -1; |
|
break; |
|
} |
|
laces = (*data) + 1; |
|
data += 1; |
|
size -= 1; |
|
lace_size = av_mallocz(laces * sizeof(int)); |
|
|
|
switch ((flags & 0x06) >> 1) { |
|
case 0x1: /* xiph lacing */ { |
|
uint8_t temp; |
|
uint32_t total = 0; |
|
for (n = 0; res == 0 && n < laces - 1; n++) { |
|
while (1) { |
|
if (size == 0) { |
|
res = -1; |
|
break; |
|
} |
|
temp = *data; |
|
lace_size[n] += temp; |
|
data += 1; |
|
size -= 1; |
|
if (temp != 0xff) |
|
break; |
|
} |
|
total += lace_size[n]; |
|
} |
|
lace_size[n] = size - total; |
|
break; |
|
} |
|
|
|
case 0x2: /* fixed-size lacing */ |
|
for (n = 0; n < laces; n++) |
|
lace_size[n] = size / laces; |
|
break; |
|
|
|
case 0x3: /* EBML lacing */ { |
|
uint32_t total; |
|
n = matroska_ebmlnum_uint(data, size, &num); |
|
if (n < 0) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"EBML block data error\n"); |
|
break; |
|
} |
|
data += n; |
|
size -= n; |
|
total = lace_size[0] = num; |
|
for (n = 1; res == 0 && n < laces - 1; n++) { |
|
int64_t snum; |
|
int r; |
|
r = matroska_ebmlnum_sint (data, size, &snum); |
|
if (r < 0) { |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"EBML block data error\n"); |
|
break; |
|
} |
|
data += r; |
|
size -= r; |
|
lace_size[n] = lace_size[n - 1] + snum; |
|
total += lace_size[n]; |
|
} |
|
lace_size[n] = size - total; |
|
break; |
|
} |
|
} |
|
break; |
|
} |
|
|
|
if (res == 0) { |
|
uint64_t timecode = AV_NOPTS_VALUE; |
|
|
|
if (cluster_time != (uint64_t)-1 |
|
&& (block_time >= 0 || cluster_time >= -block_time)) |
|
timecode = cluster_time + block_time; |
|
|
|
for (n = 0; n < laces; n++) { |
|
if (st->codec->codec_id == CODEC_ID_RA_288 || |
|
st->codec->codec_id == CODEC_ID_COOK || |
|
st->codec->codec_id == CODEC_ID_ATRAC3) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)matroska->tracks[track]; |
|
int a = st->codec->block_align; |
|
int sps = audiotrack->sub_packet_size; |
|
int cfs = audiotrack->coded_framesize; |
|
int h = audiotrack->sub_packet_h; |
|
int y = audiotrack->sub_packet_cnt; |
|
int w = audiotrack->frame_size; |
|
int x; |
|
|
|
if (!audiotrack->pkt_cnt) { |
|
if (st->codec->codec_id == CODEC_ID_RA_288) |
|
for (x=0; x<h/2; x++) |
|
memcpy(audiotrack->buf+x*2*w+y*cfs, |
|
data+x*cfs, cfs); |
|
else |
|
for (x=0; x<w/sps; x++) |
|
memcpy(audiotrack->buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); |
|
|
|
if (++audiotrack->sub_packet_cnt >= h) { |
|
audiotrack->sub_packet_cnt = 0; |
|
audiotrack->pkt_cnt = h*w / a; |
|
} |
|
} |
|
while (audiotrack->pkt_cnt) { |
|
pkt = av_mallocz(sizeof(AVPacket)); |
|
av_new_packet(pkt, a); |
|
memcpy(pkt->data, audiotrack->buf |
|
+ a * (h*w / a - audiotrack->pkt_cnt--), a); |
|
pkt->pos = pos; |
|
pkt->stream_index = stream_index; |
|
matroska_queue_packet(matroska, pkt); |
|
} |
|
} else { |
|
int result, offset = 0, ilen, olen, pkt_size = lace_size[n]; |
|
uint8_t *pkt_data = data; |
|
|
|
if (matroska->tracks[track]->encoding_scope & 1) { |
|
switch (matroska->tracks[track]->encoding_algo) { |
|
case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: |
|
offset = matroska->tracks[track]->encoding_settings_len; |
|
break; |
|
case MATROSKA_TRACK_ENCODING_COMP_LZO: |
|
pkt_data = NULL; |
|
do { |
|
ilen = lace_size[n]; |
|
olen = pkt_size *= 3; |
|
pkt_data = av_realloc(pkt_data, |
|
pkt_size+LZO_OUTPUT_PADDING); |
|
result = lzo1x_decode(pkt_data, &olen, data, &ilen); |
|
} while (result==LZO_OUTPUT_FULL && pkt_size<10000000); |
|
if (result) { |
|
av_free(pkt_data); |
|
continue; |
|
} |
|
pkt_size -= olen; |
|
break; |
|
#ifdef CONFIG_ZLIB |
|
case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { |
|
z_stream zstream = {0}; |
|
pkt_data = NULL; |
|
if (inflateInit(&zstream) != Z_OK) |
|
continue; |
|
zstream.next_in = data; |
|
zstream.avail_in = lace_size[n]; |
|
do { |
|
pkt_size *= 3; |
|
pkt_data = av_realloc(pkt_data, pkt_size); |
|
zstream.avail_out = pkt_size - zstream.total_out; |
|
zstream.next_out = pkt_data + zstream.total_out; |
|
result = inflate(&zstream, Z_NO_FLUSH); |
|
} while (result==Z_OK && pkt_size<10000000); |
|
pkt_size = zstream.total_out; |
|
inflateEnd(&zstream); |
|
if (result != Z_STREAM_END) { |
|
av_free(pkt_data); |
|
continue; |
|
} |
|
break; |
|
} |
|
#endif |
|
#ifdef CONFIG_BZLIB |
|
case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { |
|
bz_stream bzstream = {0}; |
|
pkt_data = NULL; |
|
if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) |
|
continue; |
|
bzstream.next_in = data; |
|
bzstream.avail_in = lace_size[n]; |
|
do { |
|
pkt_size *= 3; |
|
pkt_data = av_realloc(pkt_data, pkt_size); |
|
bzstream.avail_out = pkt_size - bzstream.total_out_lo32; |
|
bzstream.next_out = pkt_data + bzstream.total_out_lo32; |
|
result = BZ2_bzDecompress(&bzstream); |
|
} while (result==BZ_OK && pkt_size<10000000); |
|
pkt_size = bzstream.total_out_lo32; |
|
BZ2_bzDecompressEnd(&bzstream); |
|
if (result != BZ_STREAM_END) { |
|
av_free(pkt_data); |
|
continue; |
|
} |
|
break; |
|
} |
|
#endif |
|
} |
|
} |
|
|
|
pkt = av_mallocz(sizeof(AVPacket)); |
|
/* XXX: prevent data copy... */ |
|
if (av_new_packet(pkt, pkt_size+offset) < 0) { |
|
res = AVERROR(ENOMEM); |
|
n = laces-1; |
|
break; |
|
} |
|
if (offset) |
|
memcpy (pkt->data, matroska->tracks[track]->encoding_settings, offset); |
|
memcpy (pkt->data+offset, pkt_data, pkt_size); |
|
|
|
if (n == 0) |
|
pkt->flags = is_keyframe; |
|
pkt->stream_index = stream_index; |
|
|
|
pkt->pts = timecode; |
|
pkt->pos = pos; |
|
pkt->duration = duration; |
|
|
|
matroska_queue_packet(matroska, pkt); |
|
} |
|
|
|
if (timecode != AV_NOPTS_VALUE) |
|
timecode = duration ? timecode + duration : AV_NOPTS_VALUE; |
|
data += lace_size[n]; |
|
} |
|
} |
|
|
|
av_free(lace_size); |
|
av_free(origdata); |
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_blockgroup (MatroskaDemuxContext *matroska, |
|
uint64_t cluster_time) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
int is_bframe = 0; |
|
int is_keyframe = PKT_FLAG_KEY, last_num_packets = matroska->num_packets; |
|
uint64_t duration = AV_NOPTS_VALUE; |
|
uint8_t *data; |
|
int size = 0; |
|
int64_t pos = 0; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, "parsing blockgroup...\n"); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* one block inside the group. Note, block parsing is one |
|
* of the harder things, so this code is a bit complicated. |
|
* See http://www.matroska.org/ for documentation. */ |
|
case MATROSKA_ID_BLOCK: { |
|
pos = url_ftell(matroska->ctx->pb); |
|
res = ebml_read_binary(matroska, &id, &data, &size); |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_BLOCKDURATION: { |
|
if ((res = ebml_read_uint(matroska, &id, &duration)) < 0) |
|
break; |
|
break; |
|
} |
|
|
|
case MATROSKA_ID_BLOCKREFERENCE: { |
|
int64_t num; |
|
/* We've found a reference, so not even the first frame in |
|
* the lace is a key frame. */ |
|
is_keyframe = 0; |
|
if (last_num_packets != matroska->num_packets) |
|
matroska->packets[last_num_packets]->flags = 0; |
|
if ((res = ebml_read_sint(matroska, &id, &num)) < 0) |
|
break; |
|
if (num > 0) |
|
is_bframe = 1; |
|
break; |
|
} |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in blockgroup data\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
if (res) |
|
return res; |
|
|
|
if (size > 0) |
|
res = matroska_parse_block(matroska, data, size, pos, cluster_time, |
|
duration, is_keyframe, is_bframe); |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_parse_cluster (MatroskaDemuxContext *matroska) |
|
{ |
|
int res = 0; |
|
uint32_t id; |
|
uint64_t cluster_time = 0; |
|
uint8_t *data; |
|
int64_t pos; |
|
int size; |
|
|
|
av_log(matroska->ctx, AV_LOG_DEBUG, |
|
"parsing cluster at %"PRId64"\n", url_ftell(matroska->ctx->pb)); |
|
|
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
res = AVERROR(EIO); |
|
break; |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
/* cluster timecode */ |
|
case MATROSKA_ID_CLUSTERTIMECODE: { |
|
uint64_t num; |
|
if ((res = ebml_read_uint(matroska, &id, &num)) < 0) |
|
break; |
|
cluster_time = num; |
|
break; |
|
} |
|
|
|
/* a group of blocks inside a cluster */ |
|
case MATROSKA_ID_BLOCKGROUP: |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
res = matroska_parse_blockgroup(matroska, cluster_time); |
|
break; |
|
|
|
case MATROSKA_ID_SIMPLEBLOCK: |
|
pos = url_ftell(matroska->ctx->pb); |
|
res = ebml_read_binary(matroska, &id, &data, &size); |
|
if (res == 0) |
|
res = matroska_parse_block(matroska, data, size, pos, |
|
cluster_time, AV_NOPTS_VALUE, |
|
-1, 0); |
|
break; |
|
|
|
default: |
|
av_log(matroska->ctx, AV_LOG_INFO, |
|
"Unknown entry 0x%x in cluster data\n", id); |
|
/* fall-through */ |
|
|
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static int |
|
matroska_read_packet (AVFormatContext *s, |
|
AVPacket *pkt) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
int res; |
|
uint32_t id; |
|
|
|
/* Read stream until we have a packet queued. */ |
|
while (matroska_deliver_packet(matroska, pkt)) { |
|
|
|
/* Have we already reached the end? */ |
|
if (matroska->done) |
|
return AVERROR(EIO); |
|
|
|
res = 0; |
|
while (res == 0) { |
|
if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { |
|
return AVERROR(EIO); |
|
} else if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
|
|
switch (id) { |
|
case MATROSKA_ID_CLUSTER: |
|
if ((res = ebml_read_master(matroska, &id)) < 0) |
|
break; |
|
if ((res = matroska_parse_cluster(matroska)) == 0) |
|
res = 1; /* Parsed one cluster, let's get out. */ |
|
break; |
|
|
|
default: |
|
case EBML_ID_VOID: |
|
res = ebml_read_skip(matroska); |
|
break; |
|
} |
|
|
|
if (matroska->level_up) { |
|
matroska->level_up--; |
|
break; |
|
} |
|
} |
|
|
|
if (res == -1) |
|
matroska->done = 1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int |
|
matroska_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, |
|
int flags) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
AVStream *st = s->streams[stream_index]; |
|
int index; |
|
|
|
/* find index entry */ |
|
index = av_index_search_timestamp(st, timestamp, flags); |
|
if (index < 0) |
|
return 0; |
|
|
|
matroska_clear_queue(matroska); |
|
|
|
/* do the seek */ |
|
url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET); |
|
matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); |
|
matroska->skip_to_stream = st; |
|
matroska->peek_id = 0; |
|
return 0; |
|
} |
|
|
|
static int |
|
matroska_read_close (AVFormatContext *s) |
|
{ |
|
MatroskaDemuxContext *matroska = s->priv_data; |
|
int n = 0; |
|
|
|
av_free(matroska->writing_app); |
|
av_free(matroska->muxing_app); |
|
av_free(matroska->index); |
|
|
|
matroska_clear_queue(matroska); |
|
|
|
for (n = 0; n < matroska->num_tracks; n++) { |
|
MatroskaTrack *track = matroska->tracks[n]; |
|
av_free(track->codec_id); |
|
av_free(track->codec_name); |
|
av_free(track->codec_priv); |
|
av_free(track->name); |
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { |
|
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; |
|
av_free(audiotrack->buf); |
|
} |
|
|
|
av_free(track); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
AVInputFormat matroska_demuxer = { |
|
"matroska", |
|
"Matroska file format", |
|
sizeof(MatroskaDemuxContext), |
|
matroska_probe, |
|
matroska_read_header, |
|
matroska_read_packet, |
|
matroska_read_close, |
|
matroska_read_seek, |
|
};
|
|
|