[SCM] libav/experimental: inline to allow constant propagation 50% faster predictor_update_filter, 1-10% faster ape decoding on core2
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 16:55:26 UTC 2013
The following commit has been merged in the experimental branch:
commit 36373cde20957b621aaab4779b36ee87096e5e93
Author: Loren Merritt <lorenm at u.washington.edu>
Date: Thu Dec 3 17:44:08 2009 +0000
inline to allow constant propagation
50% faster predictor_update_filter, 1-10% faster ape decoding on core2
Originally committed as revision 20719 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 20ebe9e..fa8f654 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -517,7 +517,7 @@ static inline int APESIGN(int32_t x) {
return (x < 0) - (x > 0);
}
-static int predictor_update_filter(APEPredictor *p, const int decoded, const int filter, const int delayA, const int delayB, const int adaptA, const int adaptB)
+static av_always_inline int predictor_update_filter(APEPredictor *p, const int decoded, const int filter, const int delayA, const int delayB, const int adaptA, const int adaptB)
{
int32_t predictionA, predictionB;
@@ -578,17 +578,16 @@ static int predictor_update_filter(APEPredictor *p, const int decoded, const int
static void predictor_decode_stereo(APEContext * ctx, int count)
{
- int32_t predictionA, predictionB;
APEPredictor *p = &ctx->predictor;
int32_t *decoded0 = ctx->decoded0;
int32_t *decoded1 = ctx->decoded1;
while (count--) {
/* Predictor Y */
- predictionA = predictor_update_filter(p, *decoded0, 0, YDELAYA, YDELAYB, YADAPTCOEFFSA, YADAPTCOEFFSB);
- predictionB = predictor_update_filter(p, *decoded1, 1, XDELAYA, XDELAYB, XADAPTCOEFFSA, XADAPTCOEFFSB);
- *(decoded0++) = predictionA;
- *(decoded1++) = predictionB;
+ *decoded0 = predictor_update_filter(p, *decoded0, 0, YDELAYA, YDELAYB, YADAPTCOEFFSA, YADAPTCOEFFSB);
+ decoded0++;
+ *decoded1 = predictor_update_filter(p, *decoded1, 1, XDELAYA, XDELAYB, XADAPTCOEFFSA, XADAPTCOEFFSB);
+ decoded1++;
/* Combined */
p->buf++;
--
Libav/FFmpeg packaging
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