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Implement audio cutoff frequency to the vorbis encoder.

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Patch by Justin Ruggles jruggle earthlink net.

Originally committed as revision 4877 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2006-01-21 17:09:23 +00:00 committed by Benjamin Larsson
parent 48d1b9a17c
commit 13c7145135
1 changed files with 24 additions and 14 deletions
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38
libavcodec/oggvorbis.c
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@ -29,25 +29,35 @@ typedef struct OggVorbisContext {
static int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
double cfreq;
if(avccontext->flags & CODEC_FLAG_QSCALE) {
return vorbis_encode_init_vbr(vi, avccontext->channels,
/* variable bitrate */
if(vorbis_encode_setup_vbr(vi, avccontext->channels,
avccontext->sample_rate,
avccontext->global_quality / (float)FF_QP2LAMBDA);
}
avccontext->global_quality / (float)FF_QP2LAMBDA))
return -1;
} else {
/* constant bitrate */
if(vorbis_encode_setup_managed(vi, avccontext->channels,
avccontext->sample_rate, -1, avccontext->bit_rate, -1))
return -1;
#ifdef OGGVORBIS_VBR_BY_ESTIMATE
/* variable bitrate by estimate */
return (vorbis_encode_setup_managed(vi, avccontext->channels,
avccontext->sample_rate, -1, avccontext->bit_rate, -1) ||
vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL) ||
vorbis_encode_setup_init(vi)) ;
#else
/* constant bitrate */
return vorbis_encode_init(vi, avccontext->channels,
avccontext->sample_rate, -1, avccontext->bit_rate, -1) ;
/* variable bitrate by estimate */
if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL))
return -1;
#endif
}
/* cutoff frequency */
if(avccontext->cutoff > 0) {
cfreq = avccontext->cutoff / 1000.0;
if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
return -1;
}
return vorbis_encode_setup_init(vi);
}
static int oggvorbis_encode_init(AVCodecContext *avccontext) {