X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_04%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fratecontrol.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_04%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fratecontrol.c;h=2aeb12b3e02d272344d850440820de901c889dcc;hb=f64373f72487d6aa502d9bde985b8a2d5519f099;hp=0000000000000000000000000000000000000000;hpb=ad81c2528eb79c7500e65fd15a9f66375f75d121;p=synfig.git

diff --git a/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/ratecontrol.c b/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/ratecontrol.c
new file mode 100644
index 0000000..2aeb12b
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/ratecontrol.c
@@ -0,0 +1,835 @@
+/*
+ * 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;
+}