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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
This commit is contained in:
Loren Merritt 2009-12-03 17:44:08 +00:00
parent 2784ede40a
commit 36373cde20
1 changed files with 5 additions and 6 deletions
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11
libavcodec/apedec.c
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@ -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++;