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swr: unroll audioconvert core C function 

36k->32k decicycles

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-27 04:53:56 +02:00
parent 4119fa7023
commit bbd3dc49ff
1 changed files with 9 additions and 2 deletions
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11
libswresample/audioconvert.c
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@ -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