[FFmpeg-devel] [PATCH] lavc/acelp_pitch_delay: replace exp2f(M_LOG2_10 *x) by exp10f(x)

Ganesh Ajjanagadde gajjanagadde at gmail.com
Wed Dec 23 21:26:07 CET 2015


Suggested-by: Ronald S. Bultje <rsbultje at gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
---
 libavcodec/acelp_pitch_delay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/acelp_pitch_delay.c b/libavcodec/acelp_pitch_delay.c
index 3ecec01..95272d9 100644
--- a/libavcodec/acelp_pitch_delay.c
+++ b/libavcodec/acelp_pitch_delay.c
@@ -132,7 +132,7 @@ float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy,
     // ^g_c = ^gamma_gc * 100.05 (predicted dB + mean dB - dB of fixed vector)
     // Note 10^(0.05 * -10log(average x2)) = 1/sqrt((average x2)).
     float val = fixed_gain_factor *
-        exp2f(M_LOG2_10 * 0.05 *
+        exp10f(0.05 *
               (avpriv_scalarproduct_float_c(pred_table, prediction_error, 4) +
                energy_mean)) /
         sqrtf(fixed_mean_energy);
-- 
2.6.4



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