[FFmpeg-soc] [soc]: r4167 - amr/amrnbfloatdec.c

[kmalaussene]

Author: kmalaussene
Date: Wed Mar  4 22:44:08 2009
New Revision: 4167

Log:
Replace division by multiplication in fixed_gain_smooth.

Modified:
   amr/amrnbfloatdec.c

Modified: amr/amrnbfloatdec.c
==============================================================================
--- amr/amrnbfloatdec.c	Wed Mar  4 22:42:26 2009	(r4166)
+++ amr/amrnbfloatdec.c	Wed Mar  4 22:44:08 2009	(r4167)
@@ -706,9 +706,9 @@ static float fixed_gain_smooth(AMRContex
     // if diff has been >0.65 for 10 frames (40 subframes) no smoothing is applied
     if((p->diff_count = diff > 0.65 ? p->diff_count+1 : 0) < 40) {
         // calculate the fixed gain smoothing factor (k_m)
-        const float smoothing_factor = FFMIN(0.25, FFMAX(0.0, diff - 0.4))/0.25;
+        const float smoothing_factor = FFMIN(1.0, FFMAX(0.0, 4.0*diff - 1.6));
         // calculate the mean fixed gain for the current subframe
-        const float fixed_gain_mean = (p->fixed_gain[0] + p->fixed_gain[1] + p->fixed_gain[2] + p->fixed_gain[3] + p->fixed_gain[4])/5.0;
+        const float fixed_gain_mean = (p->fixed_gain[0] + p->fixed_gain[1] + p->fixed_gain[2] + p->fixed_gain[3] + p->fixed_gain[4])*0.2;
         // calculate the smoothed fixed gain
         p->fixed_gain[4] = smoothing_factor*p->fixed_gain[4] + (1.0 - smoothing_factor)*fixed_gain_mean;
     }