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Snow: 10l. 1pass ratecontrol failed to set snow's internal quant. 

Originally committed as revision 5426 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2006-05-30 04:51:58 +00:00
parent b29183a150
commit 383f62fdfe
1 changed files with 8 additions and 4 deletions
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12
libavcodec/snow.c
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@ -3912,6 +3912,11 @@ static int common_init(AVCodecContext *avctx){
return 0;
}
static int qscale2qlog(int qscale){
return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
+ 61*QROOT/8; //<64 >60
}
static void ratecontrol_1pass(SnowContext *s, AVFrame *pict)
{
/* estimate the frame's complexity as a sum of weighted dwt coefs.
@ -3955,6 +3960,7 @@ static void ratecontrol_1pass(SnowContext *s, AVFrame *pict)
pict->quality= ff_rate_estimate_qscale(&s->m, 1);
s->lambda= pict->quality * 3/2;
s->qlog= qscale2qlog(pict->quality);
}
static void calculate_vissual_weight(SnowContext *s, Plane *p){
@ -4016,7 +4022,7 @@ static int encode_init(AVCodecContext *avctx)
if(!avctx->stats_out)
avctx->stats_out = av_mallocz(256);
}
if(!(avctx->flags&CODEC_FLAG_QSCALE)){
if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
if(ff_rate_control_init(&s->m) < 0)
return -1;
}
@ -4138,9 +4144,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
if(s->pass1_rc && avctx->frame_number == 0)
pict->quality= 2*FF_QP2LAMBDA;
if(pict->quality){
s->qlog= rint(QROOT*log(pict->quality / (float)FF_QP2LAMBDA)/log(2));
//<64 >60
s->qlog += 61*QROOT/8;
s->qlog= qscale2qlog(pict->quality);
s->lambda = pict->quality * 3/2;
}
if(s->qlog < 0 || (!pict->quality && (avctx->flags & CODEC_FLAG_QSCALE))){