forked from KolibriOS/kolibrios
692 lines
21 KiB
C
692 lines
21 KiB
C
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/*
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* MSMPEG4 encoder backend
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
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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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* MSMPEG4 encoder backend
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*/
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#include <stdint.h>
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#include <string.h>
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#include "libavutil/attributes.h"
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#include "libavutil/avutil.h"
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#include "libavutil/mem.h"
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#include "mpegvideo.h"
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#include "h263.h"
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#include "mpeg4video.h"
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#include "msmpeg4.h"
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#include "msmpeg4data.h"
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#include "put_bits.h"
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#include "rl.h"
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#include "vc1data.h"
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static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];
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/* build the table which associate a (x,y) motion vector to a vlc */
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static av_cold void init_mv_table(MVTable *tab)
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{
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int i, x, y;
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tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096);
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/* mark all entries as not used */
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for(i=0;i<4096;i++)
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tab->table_mv_index[i] = tab->n;
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for(i=0;i<tab->n;i++) {
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x = tab->table_mvx[i];
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y = tab->table_mvy[i];
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tab->table_mv_index[(x << 6) | y] = i;
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}
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}
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void ff_msmpeg4_code012(PutBitContext *pb, int n)
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{
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if (n == 0) {
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put_bits(pb, 1, 0);
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} else {
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put_bits(pb, 1, 1);
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put_bits(pb, 1, (n >= 2));
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}
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}
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static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){
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int size=0;
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int code;
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int run_diff= intra ? 0 : 1;
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code = get_rl_index(rl, last, run, level);
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size+= rl->table_vlc[code][1];
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if (code == rl->n) {
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int level1, run1;
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level1 = level - rl->max_level[last][run];
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if (level1 < 1)
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goto esc2;
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code = get_rl_index(rl, last, run, level1);
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if (code == rl->n) {
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esc2:
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size++;
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if (level > MAX_LEVEL)
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goto esc3;
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run1 = run - rl->max_run[last][level] - run_diff;
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if (run1 < 0)
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goto esc3;
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code = get_rl_index(rl, last, run1, level);
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if (code == rl->n) {
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esc3:
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/* third escape */
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size+=1+1+6+8;
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} else {
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/* second escape */
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size+= 1+1+ rl->table_vlc[code][1];
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}
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} else {
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/* first escape */
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size+= 1+1+ rl->table_vlc[code][1];
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}
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} else {
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size++;
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}
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return size;
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}
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av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
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{
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static int init_done=0;
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int i;
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ff_msmpeg4_common_init(s);
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if(s->msmpeg4_version>=4){
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s->min_qcoeff= -255;
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s->max_qcoeff= 255;
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}
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if (!init_done) {
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/* init various encoding tables */
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init_done = 1;
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init_mv_table(&ff_mv_tables[0]);
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init_mv_table(&ff_mv_tables[1]);
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for(i=0;i<NB_RL_TABLES;i++)
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ff_init_rl(&ff_rl_table[i], ff_static_rl_table_store[i]);
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for(i=0; i<NB_RL_TABLES; i++){
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int level;
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for (level = 1; level <= MAX_LEVEL; level++) {
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int run;
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for(run=0; run<=MAX_RUN; run++){
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int last;
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for(last=0; last<2; last++){
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rl_length[i][level][run][last]= get_size_of_code(s, &ff_rl_table[ i], last, run, level, 0);
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}
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}
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}
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}
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}
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}
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static void find_best_tables(MpegEncContext * s)
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{
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int i;
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int best = 0, best_size = INT_MAX;
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int chroma_best = 0, best_chroma_size = INT_MAX;
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for(i=0; i<3; i++){
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int level;
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int chroma_size=0;
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int size=0;
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if(i>0){// ;)
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size++;
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chroma_size++;
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}
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for(level=0; level<=MAX_LEVEL; level++){
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int run;
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for(run=0; run<=MAX_RUN; run++){
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int last;
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const int last_size= size + chroma_size;
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for(last=0; last<2; last++){
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int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last];
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int intra_luma_count = s->ac_stats[1][0][level][run][last];
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int intra_chroma_count= s->ac_stats[1][1][level][run][last];
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if(s->pict_type==AV_PICTURE_TYPE_I){
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size += intra_luma_count *rl_length[i ][level][run][last];
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chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
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}else{
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size+= intra_luma_count *rl_length[i ][level][run][last]
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+intra_chroma_count*rl_length[i+3][level][run][last]
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+inter_count *rl_length[i+3][level][run][last];
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}
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}
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if(last_size == size+chroma_size) break;
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}
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}
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if(size<best_size){
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best_size= size;
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best= i;
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}
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if(chroma_size<best_chroma_size){
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best_chroma_size= chroma_size;
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chroma_best= i;
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}
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}
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if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best;
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memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2);
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s->rl_table_index = best;
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s->rl_chroma_table_index= chroma_best;
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if(s->pict_type != s->last_non_b_pict_type){
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s->rl_table_index= 2;
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if(s->pict_type==AV_PICTURE_TYPE_I)
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s->rl_chroma_table_index= 1;
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else
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s->rl_chroma_table_index= 2;
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}
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}
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/* write MSMPEG4 compatible frame header */
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void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
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{
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find_best_tables(s);
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avpriv_align_put_bits(&s->pb);
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put_bits(&s->pb, 2, s->pict_type - 1);
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put_bits(&s->pb, 5, s->qscale);
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if(s->msmpeg4_version<=2){
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s->rl_table_index = 2;
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s->rl_chroma_table_index = 2;
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}
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s->dc_table_index = 1;
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s->mv_table_index = 1; /* only if P frame */
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s->use_skip_mb_code = 1; /* only if P frame */
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s->per_mb_rl_table = 0;
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if(s->msmpeg4_version==4)
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s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);
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av_dlog(s, "%d %d %d %d %d\n", s->pict_type, s->bit_rate,
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s->inter_intra_pred, s->width, s->height);
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if (s->pict_type == AV_PICTURE_TYPE_I) {
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s->slice_height= s->mb_height/1;
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put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);
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if(s->msmpeg4_version==4){
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ff_msmpeg4_encode_ext_header(s);
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if(s->bit_rate>MBAC_BITRATE)
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put_bits(&s->pb, 1, s->per_mb_rl_table);
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}
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if(s->msmpeg4_version>2){
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if(!s->per_mb_rl_table){
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ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
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ff_msmpeg4_code012(&s->pb, s->rl_table_index);
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}
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put_bits(&s->pb, 1, s->dc_table_index);
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}
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} else {
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put_bits(&s->pb, 1, s->use_skip_mb_code);
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if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)
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put_bits(&s->pb, 1, s->per_mb_rl_table);
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if(s->msmpeg4_version>2){
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if(!s->per_mb_rl_table)
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ff_msmpeg4_code012(&s->pb, s->rl_table_index);
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put_bits(&s->pb, 1, s->dc_table_index);
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put_bits(&s->pb, 1, s->mv_table_index);
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}
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}
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s->esc3_level_length= 0;
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s->esc3_run_length= 0;
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}
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void ff_msmpeg4_encode_ext_header(MpegEncContext * s)
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{
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unsigned fps = s->avctx->time_base.den / s->avctx->time_base.num / FFMAX(s->avctx->ticks_per_frame, 1);
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put_bits(&s->pb, 5, FFMIN(fps, 31)); //yes 29.97 -> 29
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put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));
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if(s->msmpeg4_version>=3)
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put_bits(&s->pb, 1, s->flipflop_rounding);
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else
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av_assert0(s->flipflop_rounding==0);
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}
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void ff_msmpeg4_encode_motion(MpegEncContext * s,
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int mx, int my)
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{
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int code;
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MVTable *mv;
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/* modulo encoding */
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/* WARNING : you cannot reach all the MVs even with the modulo
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encoding. This is a somewhat strange compromise they took !!! */
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if (mx <= -64)
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mx += 64;
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else if (mx >= 64)
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mx -= 64;
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if (my <= -64)
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my += 64;
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else if (my >= 64)
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my -= 64;
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mx += 32;
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my += 32;
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#if 0
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if ((unsigned)mx >= 64 ||
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(unsigned)my >= 64)
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av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my);
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#endif
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mv = &ff_mv_tables[s->mv_table_index];
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code = mv->table_mv_index[(mx << 6) | my];
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put_bits(&s->pb,
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mv->table_mv_bits[code],
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mv->table_mv_code[code]);
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if (code == mv->n) {
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/* escape : code literally */
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put_bits(&s->pb, 6, mx);
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put_bits(&s->pb, 6, my);
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}
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}
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void ff_msmpeg4_handle_slices(MpegEncContext *s){
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if (s->mb_x == 0) {
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if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
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if(s->msmpeg4_version < 4){
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ff_mpeg4_clean_buffers(s);
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}
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s->first_slice_line = 1;
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} else {
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s->first_slice_line = 0;
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}
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}
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}
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static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
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{
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int range, bit_size, sign, code, bits;
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if (val == 0) {
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/* zero vector */
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code = 0;
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put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]);
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} else {
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bit_size = s->f_code - 1;
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range = 1 << bit_size;
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if (val <= -64)
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val += 64;
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else if (val >= 64)
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val -= 64;
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if (val >= 0) {
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sign = 0;
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} else {
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val = -val;
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sign = 1;
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}
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|
|
val--;
|
||
|
|
code = (val >> bit_size) + 1;
|
||
|
|
bits = val & (range - 1);
|
||
|
|
|
||
|
|
put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign);
|
||
|
|
if (bit_size > 0) {
|
||
|
|
put_bits(&s->pb, bit_size, bits);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ff_msmpeg4_encode_mb(MpegEncContext * s,
|
||
|
|
int16_t block[6][64],
|
||
|
|
int motion_x, int motion_y)
|
||
|
|
{
|
||
|
|
int cbp, coded_cbp, i;
|
||
|
|
int pred_x, pred_y;
|
||
|
|
uint8_t *coded_block;
|
||
|
|
|
||
|
|
ff_msmpeg4_handle_slices(s);
|
||
|
|
|
||
|
|
if (!s->mb_intra) {
|
||
|
|
/* compute cbp */
|
||
|
|
cbp = 0;
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
if (s->block_last_index[i] >= 0)
|
||
|
|
cbp |= 1 << (5 - i);
|
||
|
|
}
|
||
|
|
if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {
|
||
|
|
/* skip macroblock */
|
||
|
|
put_bits(&s->pb, 1, 1);
|
||
|
|
s->last_bits++;
|
||
|
|
s->misc_bits++;
|
||
|
|
s->skip_count++;
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (s->use_skip_mb_code)
|
||
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
||
|
|
|
||
|
|
if(s->msmpeg4_version<=2){
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_v2_mb_type[cbp&3][1],
|
||
|
|
ff_v2_mb_type[cbp&3][0]);
|
||
|
|
if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;
|
||
|
|
else coded_cbp= cbp;
|
||
|
|
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_h263_cbpy_tab[coded_cbp>>2][1],
|
||
|
|
ff_h263_cbpy_tab[coded_cbp>>2][0]);
|
||
|
|
|
||
|
|
s->misc_bits += get_bits_diff(s);
|
||
|
|
|
||
|
|
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
|
||
|
|
msmpeg4v2_encode_motion(s, motion_x - pred_x);
|
||
|
|
msmpeg4v2_encode_motion(s, motion_y - pred_y);
|
||
|
|
}else{
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_table_mb_non_intra[cbp + 64][1],
|
||
|
|
ff_table_mb_non_intra[cbp + 64][0]);
|
||
|
|
|
||
|
|
s->misc_bits += get_bits_diff(s);
|
||
|
|
|
||
|
|
/* motion vector */
|
||
|
|
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
|
||
|
|
ff_msmpeg4_encode_motion(s, motion_x - pred_x,
|
||
|
|
motion_y - pred_y);
|
||
|
|
}
|
||
|
|
|
||
|
|
s->mv_bits += get_bits_diff(s);
|
||
|
|
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
ff_msmpeg4_encode_block(s, block[i], i);
|
||
|
|
}
|
||
|
|
s->p_tex_bits += get_bits_diff(s);
|
||
|
|
} else {
|
||
|
|
/* compute cbp */
|
||
|
|
cbp = 0;
|
||
|
|
coded_cbp = 0;
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
int val, pred;
|
||
|
|
val = (s->block_last_index[i] >= 1);
|
||
|
|
cbp |= val << (5 - i);
|
||
|
|
if (i < 4) {
|
||
|
|
/* predict value for close blocks only for luma */
|
||
|
|
pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
|
||
|
|
*coded_block = val;
|
||
|
|
val = val ^ pred;
|
||
|
|
}
|
||
|
|
coded_cbp |= val << (5 - i);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(s->msmpeg4_version<=2){
|
||
|
|
if (s->pict_type == AV_PICTURE_TYPE_I) {
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]);
|
||
|
|
} else {
|
||
|
|
if (s->use_skip_mb_code)
|
||
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_v2_mb_type[(cbp&3) + 4][1],
|
||
|
|
ff_v2_mb_type[(cbp&3) + 4][0]);
|
||
|
|
}
|
||
|
|
put_bits(&s->pb, 1, 0); /* no AC prediction yet */
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_h263_cbpy_tab[cbp>>2][1],
|
||
|
|
ff_h263_cbpy_tab[cbp>>2][0]);
|
||
|
|
}else{
|
||
|
|
if (s->pict_type == AV_PICTURE_TYPE_I) {
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
|
||
|
|
} else {
|
||
|
|
if (s->use_skip_mb_code)
|
||
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_table_mb_non_intra[cbp][1],
|
||
|
|
ff_table_mb_non_intra[cbp][0]);
|
||
|
|
}
|
||
|
|
put_bits(&s->pb, 1, 0); /* no AC prediction yet */
|
||
|
|
if(s->inter_intra_pred){
|
||
|
|
s->h263_aic_dir=0;
|
||
|
|
put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
s->misc_bits += get_bits_diff(s);
|
||
|
|
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
ff_msmpeg4_encode_block(s, block[i], i);
|
||
|
|
}
|
||
|
|
s->i_tex_bits += get_bits_diff(s);
|
||
|
|
s->i_count++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)
|
||
|
|
{
|
||
|
|
int sign, code;
|
||
|
|
int pred, av_uninit(extquant);
|
||
|
|
int extrabits = 0;
|
||
|
|
|
||
|
|
int16_t *dc_val;
|
||
|
|
pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
|
||
|
|
|
||
|
|
/* update predictor */
|
||
|
|
if (n < 4) {
|
||
|
|
*dc_val = level * s->y_dc_scale;
|
||
|
|
} else {
|
||
|
|
*dc_val = level * s->c_dc_scale;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* do the prediction */
|
||
|
|
level -= pred;
|
||
|
|
|
||
|
|
if(s->msmpeg4_version<=2){
|
||
|
|
if (n < 4) {
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_v2_dc_lum_table[level + 256][1],
|
||
|
|
ff_v2_dc_lum_table[level + 256][0]);
|
||
|
|
}else{
|
||
|
|
put_bits(&s->pb,
|
||
|
|
ff_v2_dc_chroma_table[level + 256][1],
|
||
|
|
ff_v2_dc_chroma_table[level + 256][0]);
|
||
|
|
}
|
||
|
|
}else{
|
||
|
|
sign = 0;
|
||
|
|
if (level < 0) {
|
||
|
|
level = -level;
|
||
|
|
sign = 1;
|
||
|
|
}
|
||
|
|
code = level;
|
||
|
|
if (code > DC_MAX)
|
||
|
|
code = DC_MAX;
|
||
|
|
else if( s->msmpeg4_version>=6 ) {
|
||
|
|
if( s->qscale == 1 ) {
|
||
|
|
extquant = (level + 3) & 0x3;
|
||
|
|
code = ((level+3)>>2);
|
||
|
|
} else if( s->qscale == 2 ) {
|
||
|
|
extquant = (level + 1) & 0x1;
|
||
|
|
code = ((level+1)>>1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s->dc_table_index == 0) {
|
||
|
|
if (n < 4) {
|
||
|
|
put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
|
||
|
|
} else {
|
||
|
|
put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (n < 4) {
|
||
|
|
put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
|
||
|
|
} else {
|
||
|
|
put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(s->msmpeg4_version>=6 && s->qscale<=2)
|
||
|
|
extrabits = 3 - s->qscale;
|
||
|
|
|
||
|
|
if (code == DC_MAX)
|
||
|
|
put_bits(&s->pb, 8 + extrabits, level);
|
||
|
|
else if(extrabits > 0)//== VC1 && s->qscale<=2
|
||
|
|
put_bits(&s->pb, extrabits, extquant);
|
||
|
|
|
||
|
|
if (level != 0) {
|
||
|
|
put_bits(&s->pb, 1, sign);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Encoding of a block. Very similar to MPEG4 except for a different
|
||
|
|
escape coding (same as H263) and more vlc tables.
|
||
|
|
*/
|
||
|
|
void ff_msmpeg4_encode_block(MpegEncContext * s, int16_t * block, int n)
|
||
|
|
{
|
||
|
|
int level, run, last, i, j, last_index;
|
||
|
|
int last_non_zero, sign, slevel;
|
||
|
|
int code, run_diff, dc_pred_dir;
|
||
|
|
const RLTable *rl;
|
||
|
|
const uint8_t *scantable;
|
||
|
|
|
||
|
|
if (s->mb_intra) {
|
||
|
|
msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
|
||
|
|
i = 1;
|
||
|
|
if (n < 4) {
|
||
|
|
rl = &ff_rl_table[s->rl_table_index];
|
||
|
|
} else {
|
||
|
|
rl = &ff_rl_table[3 + s->rl_chroma_table_index];
|
||
|
|
}
|
||
|
|
run_diff = s->msmpeg4_version>=4;
|
||
|
|
scantable= s->intra_scantable.permutated;
|
||
|
|
} else {
|
||
|
|
i = 0;
|
||
|
|
rl = &ff_rl_table[3 + s->rl_table_index];
|
||
|
|
if(s->msmpeg4_version<=2)
|
||
|
|
run_diff = 0;
|
||
|
|
else
|
||
|
|
run_diff = 1;
|
||
|
|
scantable= s->inter_scantable.permutated;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* recalculate block_last_index for M$ wmv1 */
|
||
|
|
if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){
|
||
|
|
for(last_index=63; last_index>=0; last_index--){
|
||
|
|
if(block[scantable[last_index]]) break;
|
||
|
|
}
|
||
|
|
s->block_last_index[n]= last_index;
|
||
|
|
}else
|
||
|
|
last_index = s->block_last_index[n];
|
||
|
|
/* AC coefs */
|
||
|
|
last_non_zero = i - 1;
|
||
|
|
for (; i <= last_index; i++) {
|
||
|
|
j = scantable[i];
|
||
|
|
level = block[j];
|
||
|
|
if (level) {
|
||
|
|
run = i - last_non_zero - 1;
|
||
|
|
last = (i == last_index);
|
||
|
|
sign = 0;
|
||
|
|
slevel = level;
|
||
|
|
if (level < 0) {
|
||
|
|
sign = 1;
|
||
|
|
level = -level;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(level<=MAX_LEVEL && run<=MAX_RUN){
|
||
|
|
s->ac_stats[s->mb_intra][n>3][level][run][last]++;
|
||
|
|
}
|
||
|
|
|
||
|
|
s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like
|
||
|
|
|
||
|
|
code = get_rl_index(rl, last, run, level);
|
||
|
|
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
||
|
|
if (code == rl->n) {
|
||
|
|
int level1, run1;
|
||
|
|
|
||
|
|
level1 = level - rl->max_level[last][run];
|
||
|
|
if (level1 < 1)
|
||
|
|
goto esc2;
|
||
|
|
code = get_rl_index(rl, last, run, level1);
|
||
|
|
if (code == rl->n) {
|
||
|
|
esc2:
|
||
|
|
put_bits(&s->pb, 1, 0);
|
||
|
|
if (level > MAX_LEVEL)
|
||
|
|
goto esc3;
|
||
|
|
run1 = run - rl->max_run[last][level] - run_diff;
|
||
|
|
if (run1 < 0)
|
||
|
|
goto esc3;
|
||
|
|
code = get_rl_index(rl, last, run1+1, level);
|
||
|
|
if (s->msmpeg4_version == 4 && code == rl->n)
|
||
|
|
goto esc3;
|
||
|
|
code = get_rl_index(rl, last, run1, level);
|
||
|
|
if (code == rl->n) {
|
||
|
|
esc3:
|
||
|
|
/* third escape */
|
||
|
|
put_bits(&s->pb, 1, 0);
|
||
|
|
put_bits(&s->pb, 1, last);
|
||
|
|
if(s->msmpeg4_version>=4){
|
||
|
|
if(s->esc3_level_length==0){
|
||
|
|
s->esc3_level_length=8;
|
||
|
|
s->esc3_run_length= 6;
|
||
|
|
//ESCLVLSZ + ESCRUNSZ
|
||
|
|
if(s->qscale<8)
|
||
|
|
put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3);
|
||
|
|
else
|
||
|
|
put_bits(&s->pb, 8, 3);
|
||
|
|
}
|
||
|
|
put_bits(&s->pb, s->esc3_run_length, run);
|
||
|
|
put_bits(&s->pb, 1, sign);
|
||
|
|
put_bits(&s->pb, s->esc3_level_length, level);
|
||
|
|
}else{
|
||
|
|
put_bits(&s->pb, 6, run);
|
||
|
|
put_sbits(&s->pb, 8, slevel);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* second escape */
|
||
|
|
put_bits(&s->pb, 1, 1);
|
||
|
|
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
||
|
|
put_bits(&s->pb, 1, sign);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* first escape */
|
||
|
|
put_bits(&s->pb, 1, 1);
|
||
|
|
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
||
|
|
put_bits(&s->pb, 1, sign);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
put_bits(&s->pb, 1, sign);
|
||
|
|
}
|
||
|
|
last_non_zero = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|