Split the input/output data arguments to ff_adaptive_gain_control().

Originally committed as revision 22932 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/acelp_vectors.c

@@ -207,11 +207,11 @@ void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
                + weight_coeff_b * in_b[i];
 }
 
-void ff_adaptive_gain_control(float *buf_out, float speech_energ,
+void ff_adaptive_gain_control(float *out, const float *in, float speech_energ,
                               int size, float alpha, float *gain_mem)
 {
     int i;
-    float postfilter_energ = ff_dot_productf(buf_out, buf_out, size);
+    float postfilter_energ = ff_dot_productf(in, in, size);
     float gain_scale_factor = 1.0;
     float mem = *gain_mem;
 
@@ -222,7 +222,7 @@ void ff_adaptive_gain_control(float *buf_out, float speech_energ,
 
     for (i = 0; i < size; i++) {
         mem = alpha * mem + gain_scale_factor;
-        buf_out[i] *= mem;
+        out[i] = in[i] * mem;
     }
 
     *gain_mem = mem;