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/*
* H.263 internal 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_H263_H
#define AVCODEC_H263_H
#include <stdint.h>
#include "libavutil/rational.h"
#include "mpegvideo.h"
#include "h263data.h"
#define FF_ASPECT_EXTENDED 15
#define H263_GOB_HEIGHT(h) ((h) <= 400 ? 1 : (h) <= 800 ? 2 : 4)
av_const int ff_h263_aspect_to_info(AVRational aspect);
void ff_h263_encode_mb(MpegEncContext *s,
int16_t block[6][64],
int motion_x, int motion_y);
void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number);
void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);
int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
int *px, int *py);
void ff_h263_encode_init(MpegEncContext *s);
void ff_h263_init_rl_inter(void);
void ff_h263_update_motion_val(MpegEncContext * s);
void ff_h263_loop_filter(MpegEncContext * s);
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);
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, i;
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(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(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) == 0 && s->mv_type==MV_TYPE_16X16){
if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0)
cbp= 0;
}
for (i = 0; i < 6; i++) {
if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
s->block_last_index[i]= -1;
s->bdsp.clear_block(s->block[i]);
}
}
}else{
cbp= 0;
for (i = 0; i < 6; i++) {
if (s->block_last_index[i] >= 0)
cbp |= 1 << (5 - i);
}
}
return cbp;
}
#endif /* AVCODEC_H263_H */
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