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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-04-27 04:53:56 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-04-27 05:05:20 +0200 |
| commit | bbd3dc49ffc0ae2eb3ed665652093619e360312a (patch) | |
| tree | 6fbc1dc5e24ae507b6a839d8c14141030b4526ec | |
| parent | 4119fa702327f6f46d9d8a7411455f5850255a3b (diff) | |
| download | ffmpeg-bbd3dc49ffc0ae2eb3ed665652093619e360312a.tar.gz | |
swr: unroll audioconvert core C function
36k->32k decicycles
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libswresample/audioconvert.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/libswresample/audioconvert.c b/libswresample/audioconvert.c index ba47188bb3..7598bba05d 100644 --- a/libswresample/audioconvert.c +++ b/libswresample/audioconvert.c @@ -47,9 +47,16 @@ struct AudioConvert { #define CONV_FUNC(ofmt, otype, ifmt, expr)\ static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end)\ {\ - do{\ + uint8_t *end2 = end - 3*os;\ + while(po < end2){\ *(otype*)po = expr; pi += is; po += os;\ - }while(po < end);\ + *(otype*)po = expr; pi += is; po += os;\ + *(otype*)po = expr; pi += is; po += os;\ + *(otype*)po = expr; pi += is; po += os;\ + }\ + while(po < end){\ + *(otype*)po = expr; pi += is; po += os;\ + }\ } //FIXME put things below under ifdefs so we do not waste space for cases no codec will need |