+++ /dev/null
-/*
- * Rate control for video encoders
- *
- * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/**
- * @file ratecontrol.c
- * Rate control for video encoders.
- */
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-
-#undef NDEBUG // allways check asserts, the speed effect is far too small to disable them
-#include <assert.h>
-
-#ifndef M_E
-#define M_E 2.718281828
-#endif
-
-static int init_pass2(MpegEncContext *s);
-static double get_qscale(MpegEncContext *s, RateControlEntry *rce, double rate_factor, int frame_num);
-
-void ff_write_pass1_stats(MpegEncContext *s){
- sprintf(s->avctx->stats_out, "in:%d out:%d type:%d q:%f itex:%d ptex:%d mv:%d misc:%d fcode:%d bcode:%d mc-var:%d var:%d icount:%d;\n",
- s->picture_number, s->input_picture_number - s->max_b_frames, s->pict_type,
- s->frame_qscale, s->i_tex_bits, s->p_tex_bits, s->mv_bits, s->misc_bits,
- s->f_code, s->b_code, s->current_picture.mc_mb_var_sum, s->current_picture.mb_var_sum, s->i_count);
-}
-
-int ff_rate_control_init(MpegEncContext *s)
-{
- RateControlContext *rcc= &s->rc_context;
- int i;
- emms_c();
-
- for(i=0; i<5; i++){
- rcc->pred[i].coeff= 7.0;
- rcc->pred[i].count= 1.0;
-
- rcc->pred[i].decay= 0.4;
- rcc->i_cplx_sum [i]=
- rcc->p_cplx_sum [i]=
- rcc->mv_bits_sum[i]=
- rcc->qscale_sum [i]=
- rcc->frame_count[i]= 1; // 1 is better cuz of 1/0 and such
- rcc->last_qscale_for[i]=5;
- }
- rcc->buffer_index= s->avctx->rc_buffer_size/2;
-
- if(s->flags&CODEC_FLAG_PASS2){
- int i;
- char *p;
-
- /* find number of pics */
- p= s->avctx->stats_in;
- for(i=-1; p; i++){
- p= strchr(p+1, ';');
- }
- i+= s->max_b_frames;
- rcc->entry = (RateControlEntry*)av_mallocz(i*sizeof(RateControlEntry));
- rcc->num_entries= i;
-
- /* init all to skiped p frames (with b frames we might have a not encoded frame at the end FIXME) */
- for(i=0; i<rcc->num_entries; i++){
- RateControlEntry *rce= &rcc->entry[i];
- rce->pict_type= rce->new_pict_type=P_TYPE;
- rce->qscale= rce->new_qscale=2;
- rce->misc_bits= s->mb_num + 10;
- rce->mb_var_sum= s->mb_num*100;
- }
-
- /* read stats */
- p= s->avctx->stats_in;
- for(i=0; i<rcc->num_entries - s->max_b_frames; i++){
- RateControlEntry *rce;
- int picture_number;
- int e;
- char *next;
-
- next= strchr(p, ';');
- if(next){
- (*next)=0; //sscanf in unbelieavle slow on looong strings //FIXME copy / dont write
- next++;
- }
- e= sscanf(p, " in:%d ", &picture_number);
-
- assert(picture_number >= 0);
- assert(picture_number < rcc->num_entries);
- rce= &rcc->entry[picture_number];
-
- e+=sscanf(p, " in:%*d out:%*d type:%d q:%f itex:%d ptex:%d mv:%d misc:%d fcode:%d bcode:%d mc-var:%d var:%d icount:%d",
- &rce->pict_type, &rce->qscale, &rce->i_tex_bits, &rce->p_tex_bits, &rce->mv_bits, &rce->misc_bits,
- &rce->f_code, &rce->b_code, &rce->mc_mb_var_sum, &rce->mb_var_sum, &rce->i_count);
- if(e!=12){
- fprintf(stderr, "statistics are damaged at line %d, parser out=%d\n", i, e);
- return -1;
- }
- p= next;
- }
-
- if(init_pass2(s) < 0) return -1;
- }
-
- if(!(s->flags&CODEC_FLAG_PASS2)){
-
- rcc->short_term_qsum=0.001;
- rcc->short_term_qcount=0.001;
-
- rcc->pass1_rc_eq_output_sum= 0.001;
- rcc->pass1_wanted_bits=0.001;
-
- /* init stuff with the user specified complexity */
- if(s->avctx->rc_initial_cplx){
- for(i=0; i<60*30; i++){
- double bits= s->avctx->rc_initial_cplx * (i/10000.0 + 1.0)*s->mb_num;
- RateControlEntry rce;
- double q;
-
- if (i%((s->gop_size+3)/4)==0) rce.pict_type= I_TYPE;
- else if(i%(s->max_b_frames+1)) rce.pict_type= B_TYPE;
- else rce.pict_type= P_TYPE;
-
- rce.new_pict_type= rce.pict_type;
- rce.mc_mb_var_sum= bits*s->mb_num/100000;
- rce.mb_var_sum = s->mb_num;
- rce.qscale = 2;
- rce.f_code = 2;
- rce.b_code = 1;
- rce.misc_bits= 1;
-
- if(s->pict_type== I_TYPE){
- rce.i_count = s->mb_num;
- rce.i_tex_bits= bits;
- rce.p_tex_bits= 0;
- rce.mv_bits= 0;
- }else{
- rce.i_count = 0; //FIXME we do know this approx
- rce.i_tex_bits= 0;
- rce.p_tex_bits= bits*0.9;
- rce.mv_bits= bits*0.1;
- }
- rcc->i_cplx_sum [rce.pict_type] += rce.i_tex_bits*rce.qscale;
- rcc->p_cplx_sum [rce.pict_type] += rce.p_tex_bits*rce.qscale;
- rcc->mv_bits_sum[rce.pict_type] += rce.mv_bits;
- rcc->frame_count[rce.pict_type] ++;
-
- bits= rce.i_tex_bits + rce.p_tex_bits;
-
- q= get_qscale(s, &rce, rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum, i);
- rcc->pass1_wanted_bits+= s->bit_rate/(s->avctx->frame_rate / (double)s->avctx->frame_rate_base);
- }
- }
-
- }
-
- return 0;
-}
-
-void ff_rate_control_uninit(MpegEncContext *s)
-{
- RateControlContext *rcc= &s->rc_context;
- emms_c();
-
- av_freep(&rcc->entry);
-}
-
-static inline double qp2bits(RateControlEntry *rce, double qp){
- if(qp<=0.0){
- fprintf(stderr, "qp<=0.0\n");
- }
- return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ qp;
-}
-
-static inline double bits2qp(RateControlEntry *rce, double bits){
- if(bits<0.9){
- fprintf(stderr, "bits<0.9\n");
- }
- return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ bits;
-}
-
-static void update_rc_buffer(MpegEncContext *s, int frame_size){
- RateControlContext *rcc= &s->rc_context;
- const double fps= (double)s->avctx->frame_rate / (double)s->avctx->frame_rate_base;
- const double buffer_size= s->avctx->rc_buffer_size;
- const double min_rate= s->avctx->rc_min_rate/fps;
- const double max_rate= s->avctx->rc_max_rate/fps;
-
- if(buffer_size){
- rcc->buffer_index-= frame_size;
- if(rcc->buffer_index < buffer_size/2 /*FIXME /2 */ || min_rate==0){
- rcc->buffer_index+= max_rate;
- if(rcc->buffer_index >= buffer_size)
- rcc->buffer_index= buffer_size-1;
- }else{
- rcc->buffer_index+= min_rate;
- }
-
- if(rcc->buffer_index < 0)
- fprintf(stderr, "rc buffer underflow\n");
- if(rcc->buffer_index >= s->avctx->rc_buffer_size)
- fprintf(stderr, "rc buffer overflow\n");
- }
-}
-
-/**
- * modifies the bitrate curve from pass1 for one frame
- */
-static double get_qscale(MpegEncContext *s, RateControlEntry *rce, double rate_factor, int frame_num){
- RateControlContext *rcc= &s->rc_context;
- double q, bits;
- const int pict_type= rce->new_pict_type;
- const double mb_num= s->mb_num;
- int i;
-
- double const_values[]={
- M_PI,
- M_E,
- rce->i_tex_bits*rce->qscale,
- rce->p_tex_bits*rce->qscale,
- (rce->i_tex_bits + rce->p_tex_bits)*(double)rce->qscale,
- rce->mv_bits/mb_num,
- rce->pict_type == B_TYPE ? (rce->f_code + rce->b_code)*0.5 : rce->f_code,
- rce->i_count/mb_num,
- rce->mc_mb_var_sum/mb_num,
- rce->mb_var_sum/mb_num,
- rce->pict_type == I_TYPE,
- rce->pict_type == P_TYPE,
- rce->pict_type == B_TYPE,
- rcc->qscale_sum[pict_type] / (double)rcc->frame_count[pict_type],
- s->qcompress,
-/* rcc->last_qscale_for[I_TYPE],
- rcc->last_qscale_for[P_TYPE],
- rcc->last_qscale_for[B_TYPE],
- rcc->next_non_b_qscale,*/
- rcc->i_cplx_sum[I_TYPE] / (double)rcc->frame_count[I_TYPE],
- rcc->i_cplx_sum[P_TYPE] / (double)rcc->frame_count[P_TYPE],
- rcc->p_cplx_sum[P_TYPE] / (double)rcc->frame_count[P_TYPE],
- rcc->p_cplx_sum[B_TYPE] / (double)rcc->frame_count[B_TYPE],
- (rcc->i_cplx_sum[pict_type] + rcc->p_cplx_sum[pict_type]) / (double)rcc->frame_count[pict_type],
- 0
- };
- static const char *const_names[]={
- "PI",
- "E",
- "iTex",
- "pTex",
- "tex",
- "mv",
- "fCode",
- "iCount",
- "mcVar",
- "var",
- "isI",
- "isP",
- "isB",
- "avgQP",
- "qComp",
-/* "lastIQP",
- "lastPQP",
- "lastBQP",
- "nextNonBQP",*/
- "avgIITex",
- "avgPITex",
- "avgPPTex",
- "avgBPTex",
- "avgTex",
- NULL
- };
- static double (*func1[])(void *, double)={
- (void *)bits2qp,
- (void *)qp2bits,
- NULL
- };
- static const char *func1_names[]={
- "bits2qp",
- "qp2bits",
- NULL
- };
-
- bits= ff_eval(s->avctx->rc_eq, const_values, const_names, func1, func1_names, NULL, NULL, rce);
-
- rcc->pass1_rc_eq_output_sum+= bits;
- bits*=rate_factor;
- if(bits<0.0) bits=0.0;
- bits+= 1.0; //avoid 1/0 issues
-
- /* user override */
- for(i=0; i<s->avctx->rc_override_count; i++){
- RcOverride *rco= s->avctx->rc_override;
- if(rco[i].start_frame > frame_num) continue;
- if(rco[i].end_frame < frame_num) continue;
-
- if(rco[i].qscale)
- bits= qp2bits(rce, rco[i].qscale); //FIXME move at end to really force it?
- else
- bits*= rco[i].quality_factor;
- }
-
- q= bits2qp(rce, bits);
-
- /* I/B difference */
- if (pict_type==I_TYPE && s->avctx->i_quant_factor<0.0)
- q= -q*s->avctx->i_quant_factor + s->avctx->i_quant_offset;
- else if(pict_type==B_TYPE && s->avctx->b_quant_factor<0.0)
- q= -q*s->avctx->b_quant_factor + s->avctx->b_quant_offset;
-
- return q;
-}
-
-static double get_diff_limited_q(MpegEncContext *s, RateControlEntry *rce, double q){
- RateControlContext *rcc= &s->rc_context;
- AVCodecContext *a= s->avctx;
- const int pict_type= rce->new_pict_type;
- const double last_p_q = rcc->last_qscale_for[P_TYPE];
- const double last_non_b_q= rcc->last_qscale_for[rcc->last_non_b_pict_type];
-
- if (pict_type==I_TYPE && (a->i_quant_factor>0.0 || rcc->last_non_b_pict_type==P_TYPE))
- q= last_p_q *ABS(a->i_quant_factor) + a->i_quant_offset;
- else if(pict_type==B_TYPE && a->b_quant_factor>0.0)
- q= last_non_b_q* a->b_quant_factor + a->b_quant_offset;
-
- /* last qscale / qdiff stuff */
- if(rcc->last_non_b_pict_type==pict_type || pict_type!=I_TYPE){
- double last_q= rcc->last_qscale_for[pict_type];
-
- if (q > last_q + a->max_qdiff) q= last_q + a->max_qdiff;
- else if(q < last_q - a->max_qdiff) q= last_q - a->max_qdiff;
- }
-
- rcc->last_qscale_for[pict_type]= q; //Note we cant do that after blurring
-
- if(pict_type!=B_TYPE)
- rcc->last_non_b_pict_type= pict_type;
-
- return q;
-}
-
-/**
- * gets the qmin & qmax for pict_type
- */
-static void get_qminmax(int *qmin_ret, int *qmax_ret, MpegEncContext *s, int pict_type){
- int qmin= s->avctx->qmin;
- int qmax= s->avctx->qmax;
-
- assert(qmin <= qmax);
-
- if(pict_type==B_TYPE){
- qmin= (int)(qmin*ABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
- qmax= (int)(qmax*ABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
- }else if(pict_type==I_TYPE){
- qmin= (int)(qmin*ABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
- qmax= (int)(qmax*ABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
- }
-
- qmin= clip(qmin, 1, 31);
- qmax= clip(qmax, 1, 31);
-
- if(qmin==1 && s->avctx->qmin>1) qmin=2; //avoid qmin=1 unless the user wants qmin=1
-
- if(qmin<3 && s->max_qcoeff<=128 && pict_type==I_TYPE) qmin=3; //reduce cliping problems
-
- if(qmax<qmin) qmax= qmin;
-
- *qmin_ret= qmin;
- *qmax_ret= qmax;
-}
-
-static double modify_qscale(MpegEncContext *s, RateControlEntry *rce, double q, int frame_num){
- RateControlContext *rcc= &s->rc_context;
- int qmin, qmax;
- double bits;
- const int pict_type= rce->new_pict_type;
- const double buffer_size= s->avctx->rc_buffer_size;
- const double min_rate= s->avctx->rc_min_rate;
- const double max_rate= s->avctx->rc_max_rate;
-
- get_qminmax(&qmin, &qmax, s, pict_type);
-
- /* modulation */
- if(s->avctx->rc_qmod_freq && frame_num%s->avctx->rc_qmod_freq==0 && pict_type==P_TYPE)
- q*= s->avctx->rc_qmod_amp;
-
- bits= qp2bits(rce, q);
-//printf("q:%f\n", q);
- /* buffer overflow/underflow protection */
- if(buffer_size){
- double expected_size= rcc->buffer_index;
-
- if(min_rate){
- double d= 2*(buffer_size - expected_size)/buffer_size;
- if(d>1.0) d=1.0;
- else if(d<0.0001) d=0.0001;
- q*= pow(d, 1.0/s->avctx->rc_buffer_aggressivity);
-
- q= FFMIN(q, bits2qp(rce, FFMAX((min_rate - buffer_size + rcc->buffer_index)*2, 1)));
- }
-
- if(max_rate){
- double d= 2*expected_size/buffer_size;
- if(d>1.0) d=1.0;
- else if(d<0.0001) d=0.0001;
- q/= pow(d, 1.0/s->avctx->rc_buffer_aggressivity);
-
- q= FFMAX(q, bits2qp(rce, FFMAX(rcc->buffer_index/2, 1)));
- }
- }
-//printf("q:%f max:%f min:%f size:%f index:%d bits:%f agr:%f\n", q,max_rate, min_rate, buffer_size, rcc->buffer_index, bits, s->avctx->rc_buffer_aggressivity);
- if(s->avctx->rc_qsquish==0.0 || qmin==qmax){
- if (q<qmin) q=qmin;
- else if(q>qmax) q=qmax;
- }else{
- double min2= log(qmin);
- double max2= log(qmax);
-
- q= log(q);
- q= (q - min2)/(max2-min2) - 0.5;
- q*= -4.0;
- q= 1.0/(1.0 + exp(q));
- q= q*(max2-min2) + min2;
-
- q= exp(q);
- }
-
- return q;
-}
-
-//----------------------------------
-// 1 Pass Code
-
-static double predict_size(Predictor *p, double q, double var)
-{
- return p->coeff*var / (q*p->count);
-}
-
-/*
-static double predict_qp(Predictor *p, double size, double var)
-{
-//printf("coeff:%f, count:%f, var:%f, size:%f//\n", p->coeff, p->count, var, size);
- return p->coeff*var / (size*p->count);
-}
-*/
-
-static void update_predictor(Predictor *p, double q, double var, double size)
-{
- double new_coeff= size*q / (var + 1);
- if(var<10) return;
-
- p->count*= p->decay;
- p->coeff*= p->decay;
- p->count++;
- p->coeff+= new_coeff;
-}
-
-static void adaptive_quantization(MpegEncContext *s, double q){
- int i;
- const float lumi_masking= s->avctx->lumi_masking / (128.0*128.0);
- const float dark_masking= s->avctx->dark_masking / (128.0*128.0);
- const float temp_cplx_masking= s->avctx->temporal_cplx_masking;
- const float spatial_cplx_masking = s->avctx->spatial_cplx_masking;
- const float p_masking = s->avctx->p_masking;
- float bits_sum= 0.0;
- float cplx_sum= 0.0;
- float cplx_tab[s->mb_num];
- float bits_tab[s->mb_num];
- const int qmin= s->avctx->mb_qmin;
- const int qmax= s->avctx->mb_qmax;
- Picture * const pic= &s->current_picture;
- int last_qscale=0;
-
- for(i=0; i<s->mb_num; i++){
- const int mb_xy= s->mb_index2xy[i];
- float temp_cplx= sqrt(pic->mc_mb_var[mb_xy]);
- float spat_cplx= sqrt(pic->mb_var[mb_xy]);
- const int lumi= pic->mb_mean[mb_xy];
- float bits, cplx, factor;
-
- if(spat_cplx < q/3) spat_cplx= q/3; //FIXME finetune
- if(temp_cplx < q/3) temp_cplx= q/3; //FIXME finetune
-
- if((s->mb_type[mb_xy]&MB_TYPE_INTRA)){//FIXME hq mode
- cplx= spat_cplx;
- factor= 1.0 + p_masking;
- }else{
- cplx= temp_cplx;
- factor= pow(temp_cplx, - temp_cplx_masking);
- }
- factor*=pow(spat_cplx, - spatial_cplx_masking);
-
- if(lumi>127)
- factor*= (1.0 - (lumi-128)*(lumi-128)*lumi_masking);
- else
- factor*= (1.0 - (lumi-128)*(lumi-128)*dark_masking);
-
- if(factor<0.00001) factor= 0.00001;
-
- bits= cplx*factor;
- cplx_sum+= cplx;
- bits_sum+= bits;
- cplx_tab[i]= cplx;
- bits_tab[i]= bits;
- }
-
- /* handle qmin/qmax cliping */
- if(s->flags&CODEC_FLAG_NORMALIZE_AQP){
- for(i=0; i<s->mb_num; i++){
- float newq= q*cplx_tab[i]/bits_tab[i];
- newq*= bits_sum/cplx_sum;
-
- if (newq > qmax){
- bits_sum -= bits_tab[i];
- cplx_sum -= cplx_tab[i]*q/qmax;
- }
- else if(newq < qmin){
- bits_sum -= bits_tab[i];
- cplx_sum -= cplx_tab[i]*q/qmin;
- }
- }
- }
-
- for(i=0; i<s->mb_num; i++){
- const int mb_xy= s->mb_index2xy[i];
- float newq= q*cplx_tab[i]/bits_tab[i];
- int intq;
-
- if(s->flags&CODEC_FLAG_NORMALIZE_AQP){
- newq*= bits_sum/cplx_sum;
- }
-
- if(i && ABS(last_qscale - newq)<0.75)
- intq= last_qscale;
- else
- intq= (int)(newq + 0.5);
-
- if (intq > qmax) intq= qmax;
- else if(intq < qmin) intq= qmin;
-//if(i%s->mb_width==0) printf("\n");
-//printf("%2d%3d ", intq, ff_sqrt(s->mc_mb_var[i]));
- last_qscale=
- pic->qscale_table[mb_xy]= intq;
- }
-}
-
-float ff_rate_estimate_qscale(MpegEncContext *s)
-{
- float q;
- int qmin, qmax;
- float br_compensation;
- double diff;
- double short_term_q;
- double fps;
- int picture_number= s->picture_number;
- int64_t wanted_bits;
- RateControlContext *rcc= &s->rc_context;
- RateControlEntry local_rce, *rce;
- double bits;
- double rate_factor;
- int var;
- const int pict_type= s->pict_type;
- Picture * const pic= &s->current_picture;
- emms_c();
-
- get_qminmax(&qmin, &qmax, s, pict_type);
-
- fps= (double)s->avctx->frame_rate / (double)s->avctx->frame_rate_base;
-//printf("input_pic_num:%d pic_num:%d frame_rate:%d\n", s->input_picture_number, s->picture_number, s->frame_rate);
- /* update predictors */
- if(picture_number>2){
- const int last_var= s->last_pict_type == I_TYPE ? rcc->last_mb_var_sum : rcc->last_mc_mb_var_sum;
- update_predictor(&rcc->pred[s->last_pict_type], rcc->last_qscale, sqrt(last_var), s->frame_bits);
- }
-
- if(s->flags&CODEC_FLAG_PASS2){
- assert(picture_number>=0);
- assert(picture_number<rcc->num_entries);
- rce= &rcc->entry[picture_number];
- wanted_bits= rce->expected_bits;
- }else{
- rce= &local_rce;
- wanted_bits= (uint64_t)(s->bit_rate*(double)picture_number/fps);
- }
-
- diff= s->total_bits - wanted_bits;
- br_compensation= (s->bit_rate_tolerance - diff)/s->bit_rate_tolerance;
- if(br_compensation<=0.0) br_compensation=0.001;
-
- var= pict_type == I_TYPE ? pic->mb_var_sum : pic->mc_mb_var_sum;
-
- short_term_q = 0; /* avoid warning */
- if(s->flags&CODEC_FLAG_PASS2){
- if(pict_type!=I_TYPE)
- assert(pict_type == rce->new_pict_type);
-
- q= rce->new_qscale / br_compensation;
-//printf("%f %f %f last:%d var:%d type:%d//\n", q, rce->new_qscale, br_compensation, s->frame_bits, var, pict_type);
- }else{
- rce->pict_type=
- rce->new_pict_type= pict_type;
- rce->mc_mb_var_sum= pic->mc_mb_var_sum;
- rce->mb_var_sum = pic-> mb_var_sum;
- rce->qscale = 2;
- rce->f_code = s->f_code;
- rce->b_code = s->b_code;
- rce->misc_bits= 1;
-
- if(picture_number>0)
- update_rc_buffer(s, s->frame_bits);
-
- bits= predict_size(&rcc->pred[pict_type], rce->qscale, sqrt(var));
- if(pict_type== I_TYPE){
- rce->i_count = s->mb_num;
- rce->i_tex_bits= bits;
- rce->p_tex_bits= 0;
- rce->mv_bits= 0;
- }else{
- rce->i_count = 0; //FIXME we do know this approx
- rce->i_tex_bits= 0;
- rce->p_tex_bits= bits*0.9;
-
- rce->mv_bits= bits*0.1;
- }
- rcc->i_cplx_sum [pict_type] += rce->i_tex_bits*rce->qscale;
- rcc->p_cplx_sum [pict_type] += rce->p_tex_bits*rce->qscale;
- rcc->mv_bits_sum[pict_type] += rce->mv_bits;
- rcc->frame_count[pict_type] ++;
-
- bits= rce->i_tex_bits + rce->p_tex_bits;
- rate_factor= rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum * br_compensation;
-
- q= get_qscale(s, rce, rate_factor, picture_number);
-
- assert(q>0.0);
-//printf("%f ", q);
- q= get_diff_limited_q(s, rce, q);
-//printf("%f ", q);
- assert(q>0.0);
-
- if(pict_type==P_TYPE || s->intra_only){ //FIXME type dependant blur like in 2-pass
- rcc->short_term_qsum*=s->qblur;
- rcc->short_term_qcount*=s->qblur;
-
- rcc->short_term_qsum+= q;
- rcc->short_term_qcount++;
-//printf("%f ", q);
- q= short_term_q= rcc->short_term_qsum/rcc->short_term_qcount;
-//printf("%f ", q);
- }
- assert(q>0.0);
-
- q= modify_qscale(s, rce, q, picture_number);
-
- rcc->pass1_wanted_bits+= s->bit_rate/fps;
-
- assert(q>0.0);
- }
-
- if(s->avctx->debug&FF_DEBUG_RC){
- printf("%c qp:%d<%2.1f<%d %d want:%d total:%d comp:%f st_q:%2.2f size:%d var:%d/%d br:%d fps:%d\n",
- av_get_pict_type_char(pict_type), qmin, q, qmax, picture_number, (int)wanted_bits/1000, (int)s->total_bits/1000,
- br_compensation, short_term_q, s->frame_bits, pic->mb_var_sum, pic->mc_mb_var_sum, s->bit_rate/1000, (int)fps
- );
- }
-
- if (q<qmin) q=qmin;
- else if(q>qmax) q=qmax;
-
- if(s->adaptive_quant)
- adaptive_quantization(s, q);
- else
- q= (int)(q + 0.5);
-
- rcc->last_qscale= q;
- rcc->last_mc_mb_var_sum= pic->mc_mb_var_sum;
- rcc->last_mb_var_sum= pic->mb_var_sum;
-#if 0
-{
- static int mvsum=0, texsum=0;
- mvsum += s->mv_bits;
- texsum += s->i_tex_bits + s->p_tex_bits;
- printf("%d %d//\n\n", mvsum, texsum);
-}
-#endif
- return q;
-}
-
-//----------------------------------------------
-// 2-Pass code
-
-static int init_pass2(MpegEncContext *s)
-{
- RateControlContext *rcc= &s->rc_context;
- int i;
- double fps= (double)s->avctx->frame_rate / (double)s->avctx->frame_rate_base;
- double complexity[5]={0,0,0,0,0}; // aproximate bits at quant=1
- double avg_quantizer[5];
- uint64_t const_bits[5]={0,0,0,0,0}; // quantizer idependant bits
- uint64_t available_bits[5];
- uint64_t all_const_bits;
- uint64_t all_available_bits= (uint64_t)(s->bit_rate*(double)rcc->num_entries/fps);
- double rate_factor=0;
- double step;
- //int last_i_frame=-10000000;
- const int filter_size= (int)(s->qblur*4) | 1;
- double expected_bits;
- double *qscale, *blured_qscale;
-
- /* find complexity & const_bits & decide the pict_types */
- for(i=0; i<rcc->num_entries; i++){
- RateControlEntry *rce= &rcc->entry[i];
-
- rce->new_pict_type= rce->pict_type;
- rcc->i_cplx_sum [rce->pict_type] += rce->i_tex_bits*rce->qscale;
- rcc->p_cplx_sum [rce->pict_type] += rce->p_tex_bits*rce->qscale;
- rcc->mv_bits_sum[rce->pict_type] += rce->mv_bits;
- rcc->frame_count[rce->pict_type] ++;
-
- complexity[rce->new_pict_type]+= (rce->i_tex_bits+ rce->p_tex_bits)*(double)rce->qscale;
- const_bits[rce->new_pict_type]+= rce->mv_bits + rce->misc_bits;
- }
- all_const_bits= const_bits[I_TYPE] + const_bits[P_TYPE] + const_bits[B_TYPE];
-
- if(all_available_bits < all_const_bits){
- fprintf(stderr, "requested bitrate is to low\n");
- return -1;
- }
-
- /* find average quantizers */
- avg_quantizer[P_TYPE]=0;
- for(step=256*256; step>0.0000001; step*=0.5){
- double expected_bits=0;
- avg_quantizer[P_TYPE]+= step;
-
- avg_quantizer[I_TYPE]= avg_quantizer[P_TYPE]*ABS(s->avctx->i_quant_factor) + s->avctx->i_quant_offset;
- avg_quantizer[B_TYPE]= avg_quantizer[P_TYPE]*ABS(s->avctx->b_quant_factor) + s->avctx->b_quant_offset;
-
- expected_bits=
- + all_const_bits
- + complexity[I_TYPE]/avg_quantizer[I_TYPE]
- + complexity[P_TYPE]/avg_quantizer[P_TYPE]
- + complexity[B_TYPE]/avg_quantizer[B_TYPE];
-
- if(expected_bits < all_available_bits) avg_quantizer[P_TYPE]-= step;
-//printf("%f %lld %f\n", expected_bits, all_available_bits, avg_quantizer[P_TYPE]);
- }
-//printf("qp_i:%f, qp_p:%f, qp_b:%f\n", avg_quantizer[I_TYPE],avg_quantizer[P_TYPE],avg_quantizer[B_TYPE]);
-
- for(i=0; i<5; i++){
- available_bits[i]= const_bits[i] + complexity[i]/avg_quantizer[i];
- }
-//printf("%lld %lld %lld %lld\n", available_bits[I_TYPE], available_bits[P_TYPE], available_bits[B_TYPE], all_available_bits);
-
- qscale= av_malloc(sizeof(double)*rcc->num_entries);
- blured_qscale= av_malloc(sizeof(double)*rcc->num_entries);
-
- for(step=256*256; step>0.0000001; step*=0.5){
- expected_bits=0;
- rate_factor+= step;
-
- rcc->buffer_index= s->avctx->rc_buffer_size/2;
-
- /* find qscale */
- for(i=0; i<rcc->num_entries; i++){
- qscale[i]= get_qscale(s, &rcc->entry[i], rate_factor, i);
- }
- assert(filter_size%2==1);
-
- /* fixed I/B QP relative to P mode */
- for(i=rcc->num_entries-1; i>=0; i--){
- RateControlEntry *rce= &rcc->entry[i];
-
- qscale[i]= get_diff_limited_q(s, rce, qscale[i]);
- }
-
- /* smooth curve */
- for(i=0; i<rcc->num_entries; i++){
- RateControlEntry *rce= &rcc->entry[i];
- const int pict_type= rce->new_pict_type;
- int j;
- double q=0.0, sum=0.0;
-
- for(j=0; j<filter_size; j++){
- int index= i+j-filter_size/2;
- double d= index-i;
- double coeff= s->qblur==0 ? 1.0 : exp(-d*d/(s->qblur * s->qblur));
-
- if(index < 0 || index >= rcc->num_entries) continue;
- if(pict_type != rcc->entry[index].new_pict_type) continue;
- q+= qscale[index] * coeff;
- sum+= coeff;
- }
- blured_qscale[i]= q/sum;
- }
-
- /* find expected bits */
- for(i=0; i<rcc->num_entries; i++){
- RateControlEntry *rce= &rcc->entry[i];
- double bits;
- rce->new_qscale= modify_qscale(s, rce, blured_qscale[i], i);
- bits= qp2bits(rce, rce->new_qscale) + rce->mv_bits + rce->misc_bits;
-//printf("%d %f\n", rce->new_bits, blured_qscale[i]);
- update_rc_buffer(s, bits);
-
- rce->expected_bits= expected_bits;
- expected_bits += bits;
- }
-
-// printf("%f %d %f\n", expected_bits, (int)all_available_bits, rate_factor);
- if(expected_bits > all_available_bits) rate_factor-= step;
- }
- av_free(qscale);
- av_free(blured_qscale);
-
- if(abs(expected_bits/all_available_bits - 1.0) > 0.01 ){
- fprintf(stderr, "Error: 2pass curve failed to converge\n");
- return -1;
- }
-
- return 0;
-}
projects / synfig.git / blobdiff