mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
252 lines
7.9 KiB
C
252 lines
7.9 KiB
C
/*
|
|
* H263 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 "get_bits.h"
|
|
#include "mpegvideo.h"
|
|
#include "rl.h"
|
|
|
|
// The defines below define the number of bits that are read at once for
|
|
// reading vlc values. Changing these may improve speed and data cache needs
|
|
// be aware though that decreasing them may need the number of stages that is
|
|
// passed to get_vlc* to be increased.
|
|
#define INTRA_MCBPC_VLC_BITS 6
|
|
#define INTER_MCBPC_VLC_BITS 7
|
|
#define CBPY_VLC_BITS 6
|
|
#define TEX_VLC_BITS 9
|
|
|
|
extern const AVRational ff_h263_pixel_aspect[16];
|
|
extern const uint8_t ff_h263_cbpy_tab[16][2];
|
|
|
|
extern const uint8_t cbpc_b_tab[4][2];
|
|
|
|
extern const uint8_t mvtab[33][2];
|
|
|
|
extern const uint8_t ff_h263_intra_MCBPC_code[9];
|
|
extern const uint8_t ff_h263_intra_MCBPC_bits[9];
|
|
|
|
extern const uint8_t ff_h263_inter_MCBPC_code[28];
|
|
extern const uint8_t ff_h263_inter_MCBPC_bits[28];
|
|
extern const uint8_t h263_mbtype_b_tab[15][2];
|
|
|
|
extern VLC ff_h263_intra_MCBPC_vlc;
|
|
extern VLC ff_h263_inter_MCBPC_vlc;
|
|
extern VLC ff_h263_cbpy_vlc;
|
|
|
|
extern RLTable ff_h263_rl_inter;
|
|
|
|
extern RLTable rl_intra_aic;
|
|
|
|
extern const uint16_t h263_format[8][2];
|
|
extern const uint8_t modified_quant_tab[2][32];
|
|
extern uint16_t ff_mba_max[6];
|
|
extern uint8_t ff_mba_length[7];
|
|
|
|
extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
|
|
|
|
|
|
int h263_decode_motion(MpegEncContext * s, int pred, int f_code);
|
|
av_const int ff_h263_aspect_to_info(AVRational aspect);
|
|
int ff_h263_decode_init(AVCodecContext *avctx);
|
|
int ff_h263_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt);
|
|
int ff_h263_decode_end(AVCodecContext *avctx);
|
|
void h263_encode_mb(MpegEncContext *s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y);
|
|
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
|
|
void h263_encode_gob_header(MpegEncContext * s, int mb_line);
|
|
int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
|
|
int *px, int *py);
|
|
void h263_encode_init(MpegEncContext *s);
|
|
void h263_decode_init_vlc(MpegEncContext *s);
|
|
int h263_decode_picture_header(MpegEncContext *s);
|
|
int ff_h263_decode_gob_header(MpegEncContext *s);
|
|
void ff_h263_update_motion_val(MpegEncContext * s);
|
|
void ff_h263_loop_filter(MpegEncContext * s);
|
|
int ff_h263_decode_mba(MpegEncContext *s);
|
|
void ff_h263_encode_mba(MpegEncContext *s);
|
|
void ff_init_qscale_tab(MpegEncContext *s);
|
|
int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
|
|
void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n);
|
|
|
|
|
|
/**
|
|
* Prints picture info if FF_DEBUG_PICT_INFO is set.
|
|
*/
|
|
void ff_h263_show_pict_info(MpegEncContext *s);
|
|
|
|
int ff_intel_h263_decode_picture_header(MpegEncContext *s);
|
|
int ff_h263_decode_mb(MpegEncContext *s,
|
|
DCTELEM block[6][64]);
|
|
|
|
/**
|
|
* Returns the value of the 3bit "source format" syntax element.
|
|
* that represents some standard picture dimensions or indicates that
|
|
* width&height are explicitly stored later.
|
|
*/
|
|
int av_const h263_get_picture_format(int width, int height);
|
|
|
|
void ff_clean_h263_qscales(MpegEncContext *s);
|
|
int ff_h263_resync(MpegEncContext *s);
|
|
const uint8_t *ff_h263_find_resync_marker(const uint8_t *p, const uint8_t *end);
|
|
int ff_h263_get_gob_height(MpegEncContext *s);
|
|
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
|
|
|
|
|
|
static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){
|
|
int l, bit_size, code;
|
|
|
|
if (val == 0) {
|
|
return mvtab[0][1];
|
|
} else {
|
|
bit_size = f_code - 1;
|
|
/* modulo encoding */
|
|
l= INT_BIT - 6 - bit_size;
|
|
val = (val<<l)>>l;
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
|
|
return 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->flags2 & CODEC_FLAG2_NO_OUTPUT){
|
|
skip_put_bits(&s->pb,
|
|
h263_get_motion_length(s, x, f_code)
|
|
+h263_get_motion_length(s, y, f_code));
|
|
}else{
|
|
ff_h263_encode_motion(s, x, f_code);
|
|
ff_h263_encode_motion(s, y, f_code);
|
|
}
|
|
}
|
|
|
|
static inline int get_p_cbp(MpegEncContext * s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y){
|
|
int cbp, i;
|
|
|
|
if(s->flags & CODEC_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->dsp.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;
|
|
}
|
|
|
|
static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
|
|
int motion_x, int motion_y, int mb_type){
|
|
int cbp=0, i;
|
|
|
|
if(s->flags & CODEC_FLAG_CBP_RD){
|
|
int score=0;
|
|
const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
|
|
|
|
for(i=0; i<6; i++){
|
|
if(s->coded_score[i] < 0){
|
|
score += s->coded_score[i];
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
}
|
|
|
|
if(cbp){
|
|
int zero_score= -6;
|
|
if ((motion_x | motion_y | s->dquant | mb_type) == 0){
|
|
zero_score-= 4; //2*MV + mb_type + cbp bit
|
|
}
|
|
|
|
zero_score*= lambda;
|
|
if(zero_score <= score){
|
|
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->dsp.clear_block(s->block[i]);
|
|
}
|
|
}
|
|
}else{
|
|
for (i = 0; i < 6; i++) {
|
|
if (s->block_last_index[i] >= 0)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
}
|
|
return cbp;
|
|
}
|
|
|
|
static inline void memsetw(short *tab, int val, int n)
|
|
{
|
|
int i;
|
|
for(i=0;i<n;i++)
|
|
tab[i] = val;
|
|
}
|
|
#endif
|