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af_hrtf: clamp output to relieve noises 

This patch relieves noises from af_hrtf by using av_clip_* instead of
casting directly. There are still some noises, which indicates other
bugs inside this filter.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35304 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
upsuper 2012-10-31 04:23:38 +00:00 committed by wm4
parent 78899a096f
commit a169aa6364
1 changed files with 5 additions and 4 deletions
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9
libaf/af_hrtf.c
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@ -26,6 +26,7 @@
#include <inttypes.h>
#include <math.h>
#include <libavutil/common.h>
#include "af.h"
#include "dsp.h"
@ -541,16 +542,16 @@ static af_data_t* play(struct af_instance_s *af, af_data_t *data)
perception. Note: Too much will destroy the acoustic space
and may even result in headaches. */
diff = STEXPAND2 * (left - right);
out[0] = (int16_t)(left + diff);
out[1] = (int16_t)(right - diff);
out[0] = av_clip_int16(left + diff);
out[1] = av_clip_int16(right - diff);
break;
case HRTF_MIX_MATRIX2CH:
/* Do attempt any stereo expansion with matrix encoded
sources. The L, R channels are already stereo expanded
by the steering, any further stereo expansion will sound
very unnatural. */
out[0] = (int16_t)left;
out[1] = (int16_t)right;
out[0] = av_clip_int16(left);
out[1] = av_clip_int16(right);
break;
}