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b_quant_offset (unfinished, should be 0 for now)

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Originally committed as revision 645 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-06-02 12:24:26 +00:00
parent 5bb6fbb351
commit 9effc0c71b
1 changed files with 10 additions and 10 deletions
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20
libavcodec/ratecontrol.c
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@ -149,8 +149,8 @@ int ff_rate_estimate_qscale(MpegEncContext *s)
// printf("%d %d %d\n", picture_number, (int)wanted_bits, (int)s->total_bits);
if(s->pict_type==B_TYPE){
qmin= (int)(qmin*s->b_quant_factor+0.5);
qmax= (int)(qmax*s->b_quant_factor+0.5);
qmin= (int)(qmin*s->b_quant_factor+s->b_quant_offset + 0.5);
qmax= (int)(qmax*s->b_quant_factor+s->b_quant_offset + 0.5);
}
if(qmin<1) qmin=1;
if(qmax>31) qmax=31;
@ -171,12 +171,12 @@ int ff_rate_estimate_qscale(MpegEncContext *s)
q= 1/((1/long_term_q - 1/short_term_q)*s->qcompress + 1/short_term_q);
}else if(s->pict_type==B_TYPE){
q= (int)(s->last_non_b_qscale*s->b_quant_factor+0.5);
q= (int)(s->last_non_b_qscale*s->b_quant_factor+s->b_quant_offset + 0.5);
}else{ //P Frame
int i;
int diff, best_diff=1000000000;
for(i=1; i<=31; i++){
diff= predict(&s->p_pred, i, s->mc_mb_var) - (double)s->bit_rate/fps;
diff= predict(&s->p_pred, i, s->mc_mb_var_sum) - (double)s->bit_rate/fps;
if(diff<0) diff= -diff;
if(diff<best_diff){
best_diff= diff;
@ -288,7 +288,7 @@ static int init_pass2(MpegEncContext *s)
avg_quantizer[P_TYPE]=
avg_quantizer[I_TYPE]= (complexity[I_TYPE]+complexity[P_TYPE] + complexity[B_TYPE]/s->b_quant_factor)
/ (all_available_bits - all_const_bits);
avg_quantizer[B_TYPE]= avg_quantizer[P_TYPE]*s->b_quant_factor;
avg_quantizer[B_TYPE]= avg_quantizer[P_TYPE]*s->b_quant_factor + s->b_quant_offset;
//printf("avg quantizer: %f %f\n", avg_quantizer[P_TYPE], avg_quantizer[B_TYPE]);
for(i=0; i<5; i++){
@ -308,8 +308,8 @@ static int init_pass2(MpegEncContext *s)
int qmax= s->qmax;
if(pict_type==B_TYPE){
qmin= (int)(qmin*s->b_quant_factor+0.5);
qmax= (int)(qmax*s->b_quant_factor+0.5);
qmin= (int)(qmin*s->b_quant_factor+s->b_quant_offset + 0.5);
qmax= (int)(qmax*s->b_quant_factor+s->b_quant_offset + 0.5);
}
if(qmin<1) qmin=1;
if(qmax>31) qmax=31;
@ -342,7 +342,7 @@ static int init_pass2(MpegEncContext *s)
q= 1/((1/avg_quantizer[pict_type] - 1/short_term_q)*s->qcompress + 1/short_term_q);
if (q<qmin) q=qmin;
else if(q>qmax) q=qmax;
//printf("lq:%f, sq:%f t:%f q:%f\n", avg_quantizer[rce->pict_type], short_term_q, bits_left, q);
printf("lq:%f, sq:%f t:%f q:%f\n", avg_quantizer[rce->pict_type], short_term_q, bits_left, q);
rce->new_qscale= q;
}
@ -380,8 +380,8 @@ int ff_rate_estimate_qscale_pass2(MpegEncContext *s)
// printf("%d %d %d\n", picture_number, (int)wanted_bits, (int)s->total_bits);
if(s->pict_type==B_TYPE){
qmin= (int)(qmin*s->b_quant_factor+0.5);
qmax= (int)(qmax*s->b_quant_factor+0.5);
qmin= (int)(qmin*s->b_quant_factor+s->b_quant_offset + 0.5);
qmax= (int)(qmax*s->b_quant_factor+s->b_quant_offset + 0.5);
}
if(qmin<1) qmin=1;
if(qmax>31) qmax=31;