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| author | Michael Niedermayer <michaelni@gmx.at> | 2002-09-29 22:44:22 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2002-09-29 22:44:22 +0000 |
| commit | 2ad1516a6c7180d4f9343c0f07120eaec5130d6e (patch) | |
| tree | 38dfb52da33739e269f30177e8b46c86067dbc67 /libavcodec/common.h | |
| parent | f9bb4bdffcbde7362db2a0e041a2893dde0ace6f (diff) | |
| download | ffmpeg-2ad1516a6c7180d4f9343c0f07120eaec5130d6e.tar.gz | |
idct permutation cleanup, idct can be selected per context now
fixing some threadunsafe code
Originally committed as revision 980 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/common.h')
| -rw-r--r-- | libavcodec/common.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libavcodec/common.h b/libavcodec/common.h index 9fce80f8a1..0badc44a3f 100644 --- a/libavcodec/common.h +++ b/libavcodec/common.h @@ -932,6 +932,22 @@ static inline int ff_get_fourcc(char *s){ return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24); } + +#ifdef ARCH_X86 +#define MASK_ABS(mask, level)\ + asm volatile(\ + "cdq \n\t"\ + "xorl %1, %0 \n\t"\ + "subl %1, %0 \n\t"\ + : "+a" (level), "=&d" (mask)\ + ); +#else +#define MASK_ABS(mask, level)\ + mask= level>>31;\ + level= (level^mask)-mask; +#endif + + #if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT) #define COPY3_IF_LT(x,y,a,b,c,d)\ asm volatile (\ |