mirror of
https://github.com/librempeg/librempeg
synced 2024-11-23 11:39:47 +00:00
203 lines
6.7 KiB
C
203 lines
6.7 KiB
C
/*
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* ISO Media common code
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* copyright (c) 2001 Fabrice Bellard
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* copyright (c) 2002 Francois Revol <revol@free.fr>
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* copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
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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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#ifndef AVFORMAT_ISOM_H
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#define AVFORMAT_ISOM_H
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#include "avio.h"
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#include "internal.h"
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#include "dv.h"
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/* isom.c */
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extern const AVCodecTag ff_mp4_obj_type[];
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extern const AVCodecTag ff_codec_movvideo_tags[];
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extern const AVCodecTag ff_codec_movaudio_tags[];
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extern const AVCodecTag ff_codec_movsubtitle_tags[];
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int ff_mov_iso639_to_lang(const char lang[4], int mp4);
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int ff_mov_lang_to_iso639(unsigned code, char to[4]);
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/* the QuickTime file format is quite convoluted...
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* it has lots of index tables, each indexing something in another one...
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* Here we just use what is needed to read the chunks
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*/
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typedef struct {
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int count;
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int duration;
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} MOVStts;
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typedef struct {
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int first;
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int count;
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int id;
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} MOVStsc;
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typedef struct {
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uint32_t type;
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char *path;
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char *dir;
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char volume[28];
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char filename[64];
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int16_t nlvl_to, nlvl_from;
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} MOVDref;
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typedef struct {
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uint32_t type;
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int64_t size; /* total size (excluding the size and type fields) */
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} MOVAtom;
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struct MOVParseTableEntry;
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typedef struct {
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unsigned track_id;
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uint64_t base_data_offset;
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uint64_t moof_offset;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVFragment;
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typedef struct {
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unsigned track_id;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVTrackExt;
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typedef struct MOVStreamContext {
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AVIOContext *pb;
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int ffindex; ///< AVStream index
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int next_chunk;
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unsigned int chunk_count;
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int64_t *chunk_offsets;
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unsigned int stts_count;
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MOVStts *stts_data;
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unsigned int ctts_count;
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MOVStts *ctts_data;
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unsigned int stsc_count;
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MOVStsc *stsc_data;
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unsigned int stps_count;
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unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
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int ctts_index;
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int ctts_sample;
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unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
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unsigned int alt_sample_size; ///< always contains sample size from stsz atom
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unsigned int sample_count;
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int *sample_sizes;
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int keyframe_absent;
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unsigned int keyframe_count;
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int *keyframes;
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int time_scale;
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int64_t empty_duration; ///< empty duration of the first edit list entry
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int64_t start_time; ///< start time of the media
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int64_t time_offset; ///< time offset of the edit list entries
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int current_sample;
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unsigned int bytes_per_frame;
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unsigned int samples_per_frame;
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int dv_audio_container;
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int pseudo_stream_id; ///< -1 means demux all ids
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int16_t audio_cid; ///< stsd audio compression id
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unsigned drefs_count;
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MOVDref *drefs;
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int dref_id;
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unsigned tref_type;
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unsigned trefs_count;
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uint32_t *trefs;
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int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
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int width; ///< tkhd width
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int height; ///< tkhd height
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int dts_shift; ///< dts shift when ctts is negative
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uint32_t palette[256];
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int has_palette;
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int64_t data_size;
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uint32_t tmcd_flags; ///< tmcd track flags
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int64_t track_end; ///< used for dts generation in fragmented movie files
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} MOVStreamContext;
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typedef struct MOVContext {
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AVClass *avclass;
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AVFormatContext *fc;
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int time_scale;
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int64_t duration; ///< duration of the longest track
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int found_moov; ///< 'moov' atom has been found
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int found_mdat; ///< 'mdat' atom has been found
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DVDemuxContext *dv_demux;
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AVFormatContext *dv_fctx;
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int isom; ///< 1 if file is ISO Media (mp4/3gp)
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MOVFragment fragment; ///< current fragment in moof atom
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MOVTrackExt *trex_data;
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unsigned trex_count;
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int itunes_metadata; ///< metadata are itunes style
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int chapter_track;
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int use_absolute_path;
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int64_t next_root_atom; ///< offset of the next root atom
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} MOVContext;
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int ff_mp4_read_descr_len(AVIOContext *pb);
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int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
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int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
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void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
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#define MP4ODescrTag 0x01
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#define MP4IODescrTag 0x02
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#define MP4ESDescrTag 0x03
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#define MP4DecConfigDescrTag 0x04
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#define MP4DecSpecificDescrTag 0x05
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#define MP4SLDescrTag 0x06
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#define MOV_TFHD_BASE_DATA_OFFSET 0x01
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#define MOV_TFHD_STSD_ID 0x02
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#define MOV_TFHD_DEFAULT_DURATION 0x08
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#define MOV_TFHD_DEFAULT_SIZE 0x10
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#define MOV_TFHD_DEFAULT_FLAGS 0x20
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#define MOV_TFHD_DURATION_IS_EMPTY 0x010000
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#define MOV_TRUN_DATA_OFFSET 0x01
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#define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
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#define MOV_TRUN_SAMPLE_DURATION 0x100
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#define MOV_TRUN_SAMPLE_SIZE 0x200
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#define MOV_TRUN_SAMPLE_FLAGS 0x400
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#define MOV_TRUN_SAMPLE_CTS 0x800
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#define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
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#define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
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#define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
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#define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
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int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
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enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
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int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
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void ff_mov_read_chan(AVFormatContext *s, int64_t size, AVCodecContext *codec);
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void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
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#endif /* AVFORMAT_ISOM_H */
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