mirror of https://git.ffmpeg.org/ffmpeg.git
131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
/*
|
|
* H.263 encoder header
|
|
*
|
|
* 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 AVCODEC_H263ENC_H
|
|
#define AVCODEC_H263ENC_H
|
|
|
|
#include <stdint.h>
|
|
#include "h263data.h"
|
|
#include "mpegvideoenc.h"
|
|
|
|
void ff_h263_encode_init(MpegEncContext *s);
|
|
void ff_h263_encode_picture_header(MpegEncContext *s);
|
|
void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);
|
|
void ff_h263_encode_mb(MpegEncContext *s,
|
|
int16_t block[6][64],
|
|
int motion_x, int motion_y);
|
|
void ff_h263_encode_mba(MpegEncContext *s);
|
|
|
|
void ff_init_qscale_tab(MpegEncContext *s);
|
|
void ff_clean_h263_qscales(MpegEncContext *s);
|
|
|
|
void ff_h263_encode_motion(PutBitContext *pb, int val, int f_code);
|
|
void ff_h263_update_mb(MpegEncContext *s);
|
|
|
|
static inline int h263_get_motion_length(int val, int f_code)
|
|
{
|
|
int bit_size, code, sign;
|
|
|
|
if (val == 0) {
|
|
return 1; /* ff_mvtab[0][1] */
|
|
} else {
|
|
bit_size = f_code - 1;
|
|
/* modulo encoding */
|
|
val = sign_extend(val, 6 + bit_size);
|
|
sign = val >> 31;
|
|
val = (val ^ sign) - sign; /* val = FFABS(val) */
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
|
|
return ff_mvtab[code][1] + 1 + bit_size;
|
|
}
|
|
}
|
|
|
|
static inline void ff_h263_encode_motion_vector(MpegEncContext * s,
|
|
int x, int y, int f_code)
|
|
{
|
|
if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
|
|
skip_put_bits(&s->pb,
|
|
h263_get_motion_length(x, f_code) +
|
|
h263_get_motion_length(y, f_code));
|
|
} else {
|
|
ff_h263_encode_motion(&s->pb, x, f_code);
|
|
ff_h263_encode_motion(&s->pb, y, f_code);
|
|
}
|
|
}
|
|
|
|
static inline int get_p_cbp(MpegEncContext * s,
|
|
int16_t block[6][64],
|
|
int motion_x, int motion_y){
|
|
int cbp;
|
|
|
|
if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
|
|
int best_cbpy_score = INT_MAX;
|
|
int best_cbpc_score = INT_MAX;
|
|
int cbpc = (-1), cbpy = (-1);
|
|
const int offset = (s->mv_type == MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0);
|
|
const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
|
|
|
|
for (int i = 0; i < 4; i++) {
|
|
int score = ff_h263_inter_MCBPC_bits[i + offset] * lambda;
|
|
if (i & 1) score += s->coded_score[5];
|
|
if (i & 2) score += s->coded_score[4];
|
|
|
|
if (score < best_cbpc_score) {
|
|
best_cbpc_score = score;
|
|
cbpc = i;
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < 16; i++) {
|
|
int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda;
|
|
if (i & 1) score += s->coded_score[3];
|
|
if (i & 2) score += s->coded_score[2];
|
|
if (i & 4) score += s->coded_score[1];
|
|
if (i & 8) score += s->coded_score[0];
|
|
|
|
if (score < best_cbpy_score) {
|
|
best_cbpy_score = score;
|
|
cbpy = i;
|
|
}
|
|
}
|
|
cbp = cbpc + 4 * cbpy;
|
|
if (!(motion_x | motion_y | s->dquant) && s->mv_type == MV_TYPE_16X16) {
|
|
if (best_cbpy_score + best_cbpc_score + 2 * lambda >= 0)
|
|
cbp= 0;
|
|
}
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
if (s->block_last_index[i] >= 0 && !((cbp >> (5 - i)) & 1)) {
|
|
s->block_last_index[i] = -1;
|
|
s->bdsp.clear_block(s->block[i]);
|
|
}
|
|
}
|
|
} else {
|
|
cbp = 0;
|
|
for (int i = 0; i < 6; i++) {
|
|
if (s->block_last_index[i] >= 0)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
}
|
|
return cbp;
|
|
}
|
|
|
|
#endif
|