FFmpeg
3.3.6
libavcodec
dv.h
Go to the documentation of this file.
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/*
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* Constants for DV codec
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* Copyright (c) 2002 Fabrice Bellard
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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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* @file
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* Constants for DV codec.
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*/
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#ifndef AVCODEC_DV_H
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#define AVCODEC_DV_H
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#include "
avcodec.h
"
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#include "
dv_profile.h
"
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#include "
me_cmp.h
"
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#include "
vlc.h
"
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typedef
struct
DVwork_chunk
{
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uint16_t
buf_offset
;
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uint16_t
mb_coordinates
[5];
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}
DVwork_chunk
;
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typedef
struct
DVVideoContext
{
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const
AVDVProfile
*
sys
;
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const
AVFrame
*
frame
;
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AVCodecContext
*
avctx
;
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uint8_t
*
buf
;
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uint8_t
dv_zigzag[2][64];
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void
(*get_pixels)(int16_t *
block
,
const
uint8_t
*
pixels
, ptrdiff_t linesize);
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void
(*fdct[2])(int16_t *
block
);
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void
(*
idct_put
[2])(
uint8_t
*dest, ptrdiff_t
stride
, int16_t *
block
);
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me_cmp_func
ildct_cmp
;
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DVwork_chunk
work_chunks[4 * 12 * 27];
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uint32_t idct_factor[2 * 4 * 16 * 64];
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}
DVVideoContext
;
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enum
dv_section_type
{
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dv_sect_header
= 0x1f,
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dv_sect_subcode
= 0x3f,
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dv_sect_vaux
= 0x56,
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dv_sect_audio
= 0x76,
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dv_sect_video
= 0x96,
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};
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enum
dv_pack_type
{
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dv_header525
= 0x3f,
/* see dv_write_pack for important details on */
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dv_header625
= 0xbf,
/* these two packs */
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dv_timecode
= 0x13,
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dv_audio_source
= 0x50,
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dv_audio_control
= 0x51,
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dv_audio_recdate
= 0x52,
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dv_audio_rectime
= 0x53,
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dv_video_source
= 0x60,
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dv_video_control
= 0x61,
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dv_video_recdate
= 0x62,
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dv_video_rectime
= 0x63,
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dv_unknown_pack
= 0xff,
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};
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#define DV_PROFILE_IS_HD(p) ((p)->video_stype & 0x10)
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#define DV_PROFILE_IS_1080i50(p) (((p)->video_stype == 0x14) && ((p)->dsf == 1))
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#define DV_PROFILE_IS_720p50(p) (((p)->video_stype == 0x18) && ((p)->dsf == 1))
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/**
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* largest possible DV frame, in bytes (1080i50)
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*/
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#define DV_MAX_FRAME_SIZE 576000
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/**
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* maximum number of blocks per macroblock in any DV format
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*/
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#define DV_MAX_BPM 8
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#define TEX_VLC_BITS 10
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extern
RL_VLC_ELEM
ff_dv_rl_vlc
[1664];
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int
ff_dv_init_dynamic_tables
(
DVVideoContext
*
s
,
const
AVDVProfile
*d);
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int
ff_dvvideo_init
(
AVCodecContext
*avctx);
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static
inline
int
dv_work_pool_size
(
const
AVDVProfile
*d)
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{
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int
size
= d->
n_difchan
* d->
difseg_size
* 27;
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if
(
DV_PROFILE_IS_1080i50
(d))
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size -= 3 * 27;
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if
(
DV_PROFILE_IS_720p50
(d))
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size -= 4 * 27;
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return
size
;
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}
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static
inline
void
dv_calculate_mb_xy
(
DVVideoContext
*
s
,
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DVwork_chunk
*work_chunk,
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int
m,
int
*mb_x,
int
*mb_y)
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{
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*mb_x = work_chunk->
mb_coordinates
[m] & 0xff;
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*mb_y = work_chunk->
mb_coordinates
[m] >> 8;
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/* We work with 720p frames split in half.
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* The odd half-frame (chan == 2,3) is displaced :-( */
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if
(s->
sys
->
height
== 720 && !(s->
buf
[1] & 0x0C))
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/* shifting the Y coordinate down by 72/2 macro blocks */
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*mb_y -= (*mb_y > 17) ? 18 : -72;
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}
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#endif
/* AVCODEC_DV_H */
RL_VLC_ELEM
Definition:
vlc.h:32
s
const char * s
Definition:
avisynth_c.h:768
dv_audio_recdate
Definition:
dv.h:70
size
int size
Definition:
twinvq_data.h:11134
AVFrame
This structure describes decoded (raw) audio or video data.
Definition:
frame.h:187
AVDVProfile
Definition:
dv_profile.h:39
vlc.h
dv_sect_vaux
Definition:
dv.h:59
DVVideoContext::ildct_cmp
me_cmp_func ildct_cmp
Definition:
dv.h:51
dv_video_source
Definition:
dv.h:72
dv_sect_audio
Definition:
dv.h:60
stride
int stride
Definition:
mace.c:144
dv_video_control
Definition:
dv.h:73
DVVideoContext::buf
uint8_t * buf
Definition:
dv.h:44
block
static int16_t block[64]
Definition:
dct.c:115
DV_PROFILE_IS_1080i50
#define DV_PROFILE_IS_1080i50(p)
Definition:
dv.h:80
DVVideoContext::avctx
AVCodecContext * avctx
Definition:
dv.h:43
dv_pack_type
dv_pack_type
Definition:
dv.h:64
uint8_t
uint8_t
Definition:
audio_convert.c:194
dv_sect_video
Definition:
dv.h:61
dv_sect_subcode
Definition:
dv.h:58
AVDVProfile::difseg_size
int difseg_size
Definition:
dv_profile.h:43
me_cmp_func
int(* me_cmp_func)(struct MpegEncContext *c, uint8_t *blk1, uint8_t *blk2, ptrdiff_t stride, int h)
Definition:
me_cmp.h:48
DV_PROFILE_IS_720p50
#define DV_PROFILE_IS_720p50(p)
Definition:
dv.h:81
dv_profile.h
DVVideoContext
Definition:
dv.h:40
dv_header525
Definition:
dv.h:65
DVwork_chunk::mb_coordinates
uint16_t mb_coordinates[5]
Definition:
dv.h:37
dv_unknown_pack
Definition:
dv.h:76
dv_work_pool_size
static int dv_work_pool_size(const AVDVProfile *d)
Definition:
dv.h:101
DVVideoContext::frame
const AVFrame * frame
Definition:
dv.h:42
dv_sect_header
Definition:
dv.h:57
dv_audio_rectime
Definition:
dv.h:71
dv_video_recdate
Definition:
dv.h:74
DVwork_chunk
Definition:
dv.h:35
me_cmp.h
ff_dvvideo_init
int ff_dvvideo_init(AVCodecContext *avctx)
Definition:
dv.c:198
idct_put
static void idct_put(FourXContext *f, int x, int y)
Definition:
4xm.c:550
avcodec.h
Libavcodec external API header.
void
typedef void(RENAME(mix_any_func_type))
Definition:
rematrix_template.c:52
dv_timecode
Definition:
dv.h:67
AVCodecContext
main external API structure.
Definition:
avcodec.h:1732
AVDVProfile::height
int height
Definition:
dv_profile.h:47
ff_dv_init_dynamic_tables
int ff_dv_init_dynamic_tables(DVVideoContext *s, const AVDVProfile *d)
Definition:
dv.c:175
ff_dv_rl_vlc
RL_VLC_ELEM ff_dv_rl_vlc[1664]
Definition:
dv.c:52
dv_section_type
dv_section_type
Definition:
dv.h:56
DVwork_chunk::buf_offset
uint16_t buf_offset
Definition:
dv.h:36
pixels
int pixels
Definition:
avisynth_c.h:429
dv_calculate_mb_xy
static void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y)
Definition:
dv.h:111
dv_header625
Definition:
dv.h:66
dv_video_rectime
Definition:
dv.h:75
dv_audio_source
Definition:
dv.h:68
DVVideoContext::sys
const AVDVProfile * sys
Definition:
dv.h:41
AVDVProfile::n_difchan
int n_difchan
Definition:
dv_profile.h:44
dv_audio_control
Definition:
dv.h:69
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