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intreadwrite: allow arch-specific 24-bit access macros 

Originally committed as revision 19657 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-08-16 15:51:52 +00:00
parent e6956a6e48
commit 57c36bdcea
1 changed files with 9 additions and 1 deletions
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10
libavutil/intreadwrite.h
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@ -25,7 +25,7 @@
/*
* Arch-specific headers can provide any combination of
* AV_[RW][BLN](16|32|64) macros. Preprocessor symbols must be
* AV_[RW][BLN](16|24|32|64) macros. Preprocessor symbols must be
* defined, even if these are implemented as inline functions.
*/
@ -249,20 +249,28 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed));
# define AV_WL64(p, v) AV_WL(64, p, v)
#endif
#ifndef AV_RB24
#define AV_RB24(x) ((((const uint8_t*)(x))[0] << 16) | \
(((const uint8_t*)(x))[1] << 8) | \
((const uint8_t*)(x))[2])
#endif
#ifndef AV_WB24
#define AV_WB24(p, d) do { \
((uint8_t*)(p))[2] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[0] = (d)>>16; } while(0)
#endif
#ifndef AV_RL24
#define AV_RL24(x) ((((const uint8_t*)(x))[2] << 16) | \
(((const uint8_t*)(x))[1] << 8) | \
((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL24
#define AV_WL24(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; } while(0)
#endif
#endif /* AVUTIL_INTREADWRITE_H */