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libavformat
isom.h
Go to the documentation of this file.
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/*
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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
MOVStts
{
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int
count
;
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int
duration
;
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}
MOVStts
;
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typedef
struct
MOVStsc
{
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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
MOVDref
{
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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
MOVAtom
{
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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
MOVFragment
{
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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
MOVTrackExt
{
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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
MOVSbgp
{
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unsigned
int
count
;
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unsigned
int
index
;
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}
MOVSbgp
;
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typedef
struct
MOVStreamContext
{
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AVIOContext
*
pb
;
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int
pb_is_copied
;
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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
stsz_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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int
timecode_track
;
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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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int
start_pad
;
///< amount of samples to skip due to enc-dec delay
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unsigned
int
rap_group_count
;
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MOVSbgp
*
rap_group
;
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int
nb_frames_for_fps
;
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int64_t
duration_for_fps
;
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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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int
ignore_editlist
;
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int64_t
next_root_atom
;
///< offset of the next root atom
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int
*
bitrates
;
///< bitrates read before streams creation
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int
bitrates_count
;
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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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#define MOV_TKHD_FLAG_ENABLED 0x0001
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#define MOV_TKHD_FLAG_IN_MOVIE 0x0002
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#define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
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#define MOV_TKHD_FLAG_IN_POSTER 0x0008
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#define TAG_IS_AVCI(tag) \
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((tag) == MKTAG('a', 'i', '5', 'p') || \
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(tag) == MKTAG('a', 'i', '5', 'q') || \
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(tag) == MKTAG('a', 'i', '5', '2') || \
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(tag) == MKTAG('a', 'i', '5', '3') || \
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(tag) == MKTAG('a', 'i', '5', '5') || \
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(tag) == MKTAG('a', 'i', '5', '6') || \
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(tag) == MKTAG('a', 'i', '1', 'p') || \
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(tag) == MKTAG('a', 'i', '1', 'q') || \
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(tag) == MKTAG('a', 'i', '1', '2') || \
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(tag) == MKTAG('a', 'i', '1', '3') || \
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(tag) == MKTAG('a', 'i', '1', '5') || \
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(tag) == MKTAG('a', 'i', '1', '6') || \
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(tag) == MKTAG('A', 'V', 'i', 'n'))
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int
ff_mov_read_esds
(
AVFormatContext
*
fc
,
AVIOContext
*pb,
MOVAtom
atom);
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enum
AVCodecID
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_write_chan
(
AVIOContext
*pb, int64_t channel_layout);
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#endif
/* AVFORMAT_ISOM_H */
Generated on Sun Mar 23 2014 23:50:11 for FFmpeg by
1.8.2