[FFmpeg-cvslog] celp_math: rename ff_log2 to ff_log2_q15

Mans Rullgard git at videolan.org
Sun Oct 21 13:44:26 CEST 2012


ffmpeg | branch: master | Mans Rullgard <mans at mansr.com> | Thu Oct 18 17:59:13 2012 +0100| [f0c07be6491c850f948e2029f27f06437d128f3a] | committer: Mans Rullgard

celp_math: rename ff_log2 to ff_log2_q15

This name is more descriptive as the function returns a fixed-point
value with 15 fraction bits.

Signed-off-by: Mans Rullgard <mans at mansr.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f0c07be6491c850f948e2029f27f06437d128f3a
---

 libavcodec/acelp_pitch_delay.c |    2 +-
 libavcodec/celp_math.c         |    2 +-
 libavcodec/celp_math.h         |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavcodec/acelp_pitch_delay.c b/libavcodec/acelp_pitch_delay.c
index c091301..a9668fa 100644
--- a/libavcodec/acelp_pitch_delay.c
+++ b/libavcodec/acelp_pitch_delay.c
@@ -86,7 +86,7 @@ void ff_acelp_update_past_gain(
     if(erasure)
         quant_energy[0] = FFMAX(avg_gain >> log2_ma_pred_order, -10240) - 4096; // -10 and -4 in (5.10)
     else
-        quant_energy[0] = (6165 * ((ff_log2(gain_corr_factor) >> 2) - (13 << 13))) >> 13;
+        quant_energy[0] = (6165 * ((ff_log2_q15(gain_corr_factor) >> 2) - (13 << 13))) >> 13;
 }
 
 int16_t ff_acelp_decode_gain_code(
diff --git a/libavcodec/celp_math.c b/libavcodec/celp_math.c
index c3d12e9..a9ebef6 100644
--- a/libavcodec/celp_math.c
+++ b/libavcodec/celp_math.c
@@ -67,7 +67,7 @@ static const uint16_t tab_log2[33] =
   26457,  27294,  28116,  28924,  29719,  30500,  31269,  32025,  32769,
 };
 
-int ff_log2(uint32_t value)
+int ff_log2_q15(uint32_t value)
 {
     uint8_t  power_int;
     uint8_t  frac_x0;
diff --git a/libavcodec/celp_math.h b/libavcodec/celp_math.h
index 2fad312..ed3f8c0 100644
--- a/libavcodec/celp_math.h
+++ b/libavcodec/celp_math.h
@@ -40,7 +40,7 @@ int ff_exp2(uint16_t power);
  *
  * @return value of (1<<15) * log2(value)
  */
-int ff_log2(uint32_t value);
+int ff_log2_q15(uint32_t value);
 
 /**
  * Shift value left or right depending on sign of offset parameter.



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