Author: cmcq
Date: Sat Aug 8 22:56:03 2009
New Revision: 4992
Log:
Use x*10923>>16 instead of x/6 for consistency in decode_pitch_lag
Modified:
amr/amrnbdec.c
Modified: amr/amrnbdec.c
==============================================================================
--- amr/amrnbdec.c Sat Aug 8 22:49:12 2009 (r4991)
+++ amr/amrnbdec.c Sat Aug 8 22:56:03 2009 (r4992)
@@ -362,7 +362,7 @@ static void decode_pitch_lag(int *lag_in
(subframe == 2 && mode != MODE_475 && mode != MODE_515)) {
if (mode == MODE_122) {
if (pitch_index < 463) {
- *lag_int = (pitch_index + 5) / 6 + 17;
+ *lag_int = ((pitch_index + 5) * 10923 >> 16) + 17;
*lag_frac = pitch_index - *lag_int * 6 + 105;
} else {
*lag_int = pitch_index - 368;
@@ -377,7 +377,7 @@ static void decode_pitch_lag(int *lag_in
}
} else {
if (mode == MODE_122) {
- *lag_int = (pitch_index + 5) / 6 - 1;
+ *lag_int = ((pitch_index + 5) * 10923 >> 16) - 1;
*lag_frac = pitch_index - *lag_int * 6 - 3;
*lag_int += av_clip(prev_lag_int - 5, PITCH_LAG_MIN_MODE_122,
PITCH_LAG_MAX - 9);
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