Author: kostya
Date: Thu Mar 19 07:49:16 2009
New Revision: 4178
Log:
Make frequency cutoff coefficient dependent on encoding parameters
Modified:
aacenc/psymodel.c
Modified: aacenc/psymodel.c
==============================================================================
--- aacenc/psymodel.c Wed Mar 18 22:19:58 2009 (r4177)
+++ aacenc/psymodel.c Thu Mar 19 07:49:16 2009 (r4178)
@@ -80,10 +80,17 @@ av_cold struct FFPsyPreprocessContext* f
{
FFPsyPreprocessContext *ctx;
int i;
+ float cutoff_coeff;
ctx = av_mallocz(sizeof(FFPsyPreprocessContext));
ctx->avctx = avctx;
+
+ if(avctx->flags & CODEC_FLAG_QSCALE)
+ cutoff_coeff = 1.0f / av_clip(1 + avctx->global_quality /
FF_QUALITY_SCALE, 1, 8);
+ else
+ cutoff_coeff = avctx->bit_rate / (4.0f * avctx->sample_rate *
avctx->channels);
+
ctx->fcoeffs = ff_iir_filter_init_coeffs(FF_FILTER_TYPE_BUTTERWORTH,
FF_FILTER_MODE_LOWPASS,
- FILT_ORDER, 0.25, 0.0, 0.0);
+ FILT_ORDER, cutoff_coeff, 0.0, 0.0);
if(ctx->fcoeffs){
ctx->fstate = av_mallocz(sizeof(ctx->fstate[0]) * avctx->channels);
for(i = 0; i < avctx->channels; i++)
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