Author: vitor
Date: Tue Nov 10 06:08:44 2009
New Revision: 5435
Log:
Use ff_tilt_compensation(), output is unchanged.
Modified:
amr/amrnbdec.c
Modified: amr/amrnbdec.c
==============================================================================
--- amr/amrnbdec.c Tue Nov 10 06:06:33 2009 (r5434)
+++ amr/amrnbdec.c Tue Nov 10 06:08:44 2009 (r5435)
@@ -1059,25 +1059,6 @@ static float tilt_factor(float *lpc_n, f
}
/**
- * Apply tilt compensation filter, 1 - tilt * z^-1
- *
- * @param mem Pointer to one float to keep the filter's state
- * @param tilt Tilt factor
- * @param samples AMR_SUBFRAME_SIZE array where the filter is applied
- */
-static void tilt_compensation(float *mem, float tilt, float *samples)
-{
- float new_tilt_mem = samples[AMR_SUBFRAME_SIZE - 1];
- int i;
-
- for (i = AMR_SUBFRAME_SIZE - 1; i > 0; i--)
- samples[i] -= tilt * samples[i - 1];
-
- samples[0] -= tilt * *mem;
- *mem = new_tilt_mem;
-}
-
-/**
* Perform adaptive post-filtering to enhance the quality of the speech.
* See section 6.2.1.
*
@@ -1122,7 +1103,8 @@ static void postfilter(AMRContext *p, fl
pole_out + LP_FILTER_ORDER,
AMR_SUBFRAME_SIZE, LP_FILTER_ORDER);
- tilt_compensation(&p->tilt_mem, tilt_factor(lpc_n, lpc_d), buf_out);
+ ff_tilt_compensation(&p->tilt_mem, tilt_factor(lpc_n, lpc_d), buf_out,
+ AMR_SUBFRAME_SIZE);
// Adaptive gain control
postfilter_gain = ff_dot_productf(buf_out, buf_out, AMR_SUBFRAME_SIZE);
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