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FFmpeg/libavformat/isom.h
Michael Niedermayer e4c00aca96 Merge remote-tracking branch 'qatar/master' 
* qatar/master: (38 commits)
  alac: cosmetics: general pretty-printing and comment clean up
  alac: calculate buffer size outside the loop in allocate_buffers()
  alac: change some data types to plain int
  alac: cosmetics: rename some variables and function names
  alac: multi-channel decoding support
  alac: split element parsing into a separate function
  alac: support a read sample size of up to 32
  alac: output in planar sample format
  alac: add 32-bit decoding support
  alac: simplify channel interleaving
  alac: use AVPacket fields directly in alac_decode_frame()
  alac: fix check for valid max_samples_per_frame
  alac: use get_sbits() to read LPC coefficients instead of casting
  alac: move the current samples per frame to the ALACContext
  alac: avoid using a double-negative when checking if the frame is compressed
  alac: factor out output_size check in predictor_decompress_fir_adapt()
  alac: factor out loading of next decoded sample in LPC prediction
  alac: use index into buffer_out instead of incrementing the pointer
  alac: simplify lpc coefficient adaptation
  alac: reduce the number of local variables needed in lpc prediction
  ...

Conflicts:
	libavcodec/alac.c
	libavformat/cafdec.c
	libavformat/mov.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-07-19 23:31:04 +02:00

204 lines
6.8 KiB
C
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/*
* ISO Media common code
* copyright (c) 2001 Fabrice Bellard
* copyright (c) 2002 Francois Revol <revol@free.fr>
* copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_ISOM_H
#define AVFORMAT_ISOM_H
#include "avio.h"
#include "internal.h"
#include "dv.h"
/* isom.c */
extern const AVCodecTag ff_mp4_obj_type[];
extern const AVCodecTag ff_codec_movvideo_tags[];
extern const AVCodecTag ff_codec_movaudio_tags[];
extern const AVCodecTag ff_codec_movsubtitle_tags[];
int ff_mov_iso639_to_lang(const char lang[4], int mp4);
int ff_mov_lang_to_iso639(unsigned code, char to[4]);
/* the QuickTime file format is quite convoluted...
* it has lots of index tables, each indexing something in another one...
* Here we just use what is needed to read the chunks
*/
typedef struct {
int count;
int duration;
} MOVStts;
typedef struct {
int first;
int count;
int id;
} MOVStsc;
typedef struct {
uint32_t type;
char *path;
char *dir;
char volume[28];
char filename[64];
int16_t nlvl_to, nlvl_from;
} MOVDref;
typedef struct {
uint32_t type;
int64_t size; /* total size (excluding the size and type fields) */
} MOVAtom;
struct MOVParseTableEntry;
typedef struct {
unsigned track_id;
uint64_t base_data_offset;
uint64_t moof_offset;
unsigned stsd_id;
unsigned duration;
unsigned size;
unsigned flags;
} MOVFragment;
typedef struct {
unsigned track_id;
unsigned stsd_id;
unsigned duration;
unsigned size;
unsigned flags;
} MOVTrackExt;
typedef struct MOVStreamContext {
AVIOContext *pb;
int ffindex; ///< AVStream index
int next_chunk;
unsigned int chunk_count;
int64_t *chunk_offsets;
unsigned int stts_count;
MOVStts *stts_data;
unsigned int ctts_count;
MOVStts *ctts_data;
unsigned int stsc_count;
MOVStsc *stsc_data;
unsigned int stps_count;
unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
int ctts_index;
int ctts_sample;
unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
unsigned int alt_sample_size; ///< always contains sample size from stsz atom
unsigned int sample_count;
int *sample_sizes;
int keyframe_absent;
unsigned int keyframe_count;
int *keyframes;
int time_scale;
int64_t empty_duration; ///< empty duration of the first edit list entry
int64_t start_time; ///< start time of the media
int64_t time_offset; ///< time offset of the edit list entries
int current_sample;
unsigned int bytes_per_frame;
unsigned int samples_per_frame;
int dv_audio_container;
int pseudo_stream_id; ///< -1 means demux all ids
int16_t audio_cid; ///< stsd audio compression id
unsigned drefs_count;
MOVDref *drefs;
int dref_id;
unsigned tref_type;
unsigned trefs_count;
uint32_t *trefs;
int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
int width; ///< tkhd width
int height; ///< tkhd height
int dts_shift; ///< dts shift when ctts is negative
uint32_t palette[256];
int has_palette;
int64_t data_size;
uint32_t tmcd_flags; ///< tmcd track flags
int64_t track_end; ///< used for dts generation in fragmented movie files
int start_pad; ///< amount of samples to skip due to enc-dec delay
} MOVStreamContext;
typedef struct MOVContext {
AVClass *avclass;
AVFormatContext *fc;
int time_scale;
int64_t duration; ///< duration of the longest track
int found_moov; ///< 'moov' atom has been found
int found_mdat; ///< 'mdat' atom has been found
DVDemuxContext *dv_demux;
AVFormatContext *dv_fctx;
int isom; ///< 1 if file is ISO Media (mp4/3gp)
MOVFragment fragment; ///< current fragment in moof atom
MOVTrackExt *trex_data;
unsigned trex_count;
int itunes_metadata; ///< metadata are itunes style
int chapter_track;
int use_absolute_path;
int64_t next_root_atom; ///< offset of the next root atom
} MOVContext;
int ff_mp4_read_descr_len(AVIOContext *pb);
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
#define MP4ODescrTag 0x01
#define MP4IODescrTag 0x02
#define MP4ESDescrTag 0x03
#define MP4DecConfigDescrTag 0x04
#define MP4DecSpecificDescrTag 0x05
#define MP4SLDescrTag 0x06
#define MOV_TFHD_BASE_DATA_OFFSET 0x01
#define MOV_TFHD_STSD_ID 0x02
#define MOV_TFHD_DEFAULT_DURATION 0x08
#define MOV_TFHD_DEFAULT_SIZE 0x10
#define MOV_TFHD_DEFAULT_FLAGS 0x20
#define MOV_TFHD_DURATION_IS_EMPTY 0x010000
#define MOV_TRUN_DATA_OFFSET 0x01
#define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
#define MOV_TRUN_SAMPLE_DURATION 0x100
#define MOV_TRUN_SAMPLE_SIZE 0x200
#define MOV_TRUN_SAMPLE_FLAGS 0x400
#define MOV_TRUN_SAMPLE_CTS 0x800
#define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
#define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
#define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
#define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
#define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
int ff_mov_read_chan(AVFormatContext *s, AVStream *st, int64_t size);
void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
#endif /* AVFORMAT_ISOM_H */
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