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

1 files changed, 5 insertions, 4 deletions

diff --git a/libaf/af_hrtf.c b/libaf/af_hrtf.c
index d8ec33e11b..4edf224de9 100644
--- a/libaf/af_hrtf.c
+++ b/libaf/af_hrtf.c
@@ -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;
 	}