mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 11:49:48 +00:00
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/*
|
|
* Constants for DV codec
|
|
* Copyright (c) 2002 Fabrice Bellard
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Constants for DV codec.
|
|
*/
|
|
|
|
#ifndef AVCODEC_DVDATA_H
|
|
#define AVCODEC_DVDATA_H
|
|
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
#include "get_bits.h"
|
|
#include "dv_profile.h"
|
|
|
|
typedef struct DVVideoContext {
|
|
const DVprofile *sys;
|
|
AVFrame picture;
|
|
AVCodecContext *avctx;
|
|
uint8_t *buf;
|
|
|
|
uint8_t dv_zigzag[2][64];
|
|
|
|
void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
|
|
void (*fdct[2])(DCTELEM *block);
|
|
void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
|
|
me_cmp_func ildct_cmp;
|
|
} DVVideoContext;
|
|
|
|
enum dv_section_type {
|
|
dv_sect_header = 0x1f,
|
|
dv_sect_subcode = 0x3f,
|
|
dv_sect_vaux = 0x56,
|
|
dv_sect_audio = 0x76,
|
|
dv_sect_video = 0x96,
|
|
};
|
|
|
|
enum dv_pack_type {
|
|
dv_header525 = 0x3f, /* see dv_write_pack for important details on */
|
|
dv_header625 = 0xbf, /* these two packs */
|
|
dv_timecode = 0x13,
|
|
dv_audio_source = 0x50,
|
|
dv_audio_control = 0x51,
|
|
dv_audio_recdate = 0x52,
|
|
dv_audio_rectime = 0x53,
|
|
dv_video_source = 0x60,
|
|
dv_video_control = 0x61,
|
|
dv_video_recdate = 0x62,
|
|
dv_video_rectime = 0x63,
|
|
dv_unknown_pack = 0xff,
|
|
};
|
|
|
|
extern const uint8_t ff_dv_quant_shifts[22][4];
|
|
extern const uint8_t ff_dv_quant_offset[4];
|
|
|
|
extern const int ff_dv_iweight_88[64];
|
|
extern const int ff_dv_iweight_248[64];
|
|
extern const int ff_dv_iweight_1080_y[64];
|
|
extern const int ff_dv_iweight_1080_c[64];
|
|
extern const int ff_dv_iweight_720_y[64];
|
|
extern const int ff_dv_iweight_720_c[64];
|
|
|
|
#define DV_PROFILE_IS_HD(p) ((p)->video_stype & 0x10)
|
|
#define DV_PROFILE_IS_1080i50(p) (((p)->video_stype == 0x14) && ((p)->dsf == 1))
|
|
#define DV_PROFILE_IS_720p50(p) (((p)->video_stype == 0x18) && ((p)->dsf == 1))
|
|
|
|
/* minimum number of bytes to read from a DV stream in order to
|
|
determine the profile */
|
|
#define DV_PROFILE_BYTES (6*80) /* 6 DIF blocks */
|
|
|
|
/**
|
|
* largest possible DV frame, in bytes (1080i50)
|
|
*/
|
|
#define DV_MAX_FRAME_SIZE 576000
|
|
|
|
/**
|
|
* maximum number of blocks per macroblock in any DV format
|
|
*/
|
|
#define DV_MAX_BPM 8
|
|
|
|
#define TEX_VLC_BITS 9
|
|
|
|
extern RL_VLC_ELEM ff_dv_rl_vlc[1184];
|
|
|
|
int ff_dv_init_dynamic_tables(const DVprofile *d);
|
|
int ff_dvvideo_init(AVCodecContext *avctx);
|
|
|
|
static inline int dv_work_pool_size(const DVprofile *d)
|
|
{
|
|
int size = d->n_difchan*d->difseg_size*27;
|
|
if (DV_PROFILE_IS_1080i50(d))
|
|
size -= 3*27;
|
|
if (DV_PROFILE_IS_720p50(d))
|
|
size -= 4*27;
|
|
return size;
|
|
}
|
|
|
|
static inline void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y)
|
|
{
|
|
*mb_x = work_chunk->mb_coordinates[m] & 0xff;
|
|
*mb_y = work_chunk->mb_coordinates[m] >> 8;
|
|
|
|
/* We work with 720p frames split in half. The odd half-frame (chan==2,3) is displaced :-( */
|
|
if (s->sys->height == 720 && !(s->buf[1]&0x0C)) {
|
|
*mb_y -= (*mb_y>17)?18:-72; /* shifting the Y coordinate down by 72/2 macro blocks */
|
|
}
|
|
}
|
|
|
|
#endif /* AVCODEC_DVDATA_H */
|