diff options
| author | Ramiro Polla <ramiro@lisha.ufsc.br> | 2007-04-25 08:47:15 +0000 |
|---|---|---|
| committer | Benoit Fouet <benoit.fouet@free.fr> | 2007-04-25 08:47:15 +0000 |
| commit | 7b829d2ab6509e4f7e21fd98f3c0a5af810977ec (patch) | |
| tree | f03c436f2816e85c9235a20a62fa2a0136589043 /libavutil/intreadwrite.h | |
| parent | 20d45dc2a8c3e4eb133b7947122d5c2ad7d3d79c (diff) | |
"fast unaligned" bytestream functions
patch by Ramiro Polla ramiro lisha ufsc br
original thread:
date: 03/11/2007 03:06 AM
subject: [Ffmpeg-devel] [PATCH] Machine endian bytestream functions
Originally committed as revision 8803 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/intreadwrite.h')
| -rw-r--r-- | libavutil/intreadwrite.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/libavutil/intreadwrite.h b/libavutil/intreadwrite.h index b77a92ad36..b59c481407 100644 --- a/libavutil/intreadwrite.h +++ b/libavutil/intreadwrite.h @@ -50,6 +50,21 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed)); #define AV_RL8(x) AV_RB8(x) #define AV_WL8(p, d) AV_WB8(p, d) +#ifdef HAVE_FAST_UNALIGNED +# ifdef WORDS_BIGENDIAN +# define AV_RB16(x) LD16(x) +# define AV_WB16(p, d) ST16(p, d) + +# define AV_RL16(x) bswap_16(LD16(x)) +# define AV_WL16(p, d) ST16(p, bswap_16(d)) +# else /* WORDS_BIGENDIAN */ +# define AV_RB16(x) bswap_16(LD16(x)) +# define AV_WB16(p, d) ST16(p, bswap_16(d)) + +# define AV_RL16(x) LD16(x) +# define AV_WL16(p, d) ST16(p, d) +# endif +#else /* HAVE_FAST_UNALIGNED */ #define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1]) #define AV_WB16(p, d) { \ ((uint8_t*)(p))[1] = (d); \ @@ -60,6 +75,7 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed)); #define AV_WL16(p, d) { \ ((uint8_t*)(p))[0] = (d); \ ((uint8_t*)(p))[1] = (d)>>8; } +#endif #define AV_RB24(x) ((((uint8_t*)(x))[0] << 16) | \ (((uint8_t*)(x))[1] << 8) | \ @@ -77,6 +93,21 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed)); ((uint8_t*)(p))[1] = (d)>>8; \ ((uint8_t*)(p))[2] = (d)>>16; } +#ifdef HAVE_FAST_UNALIGNED +# ifdef WORDS_BIGENDIAN +# define AV_RB32(x) LD32(x) +# define AV_WB32(p, d) ST32(p, d) + +# define AV_RL32(x) bswap_32(LD32(x)) +# define AV_WL32(p, d) ST32(p, bswap_32(d)) +# else /* WORDS_BIGENDIAN */ +# define AV_RB32(x) bswap_32(LD32(x)) +# define AV_WB32(p, d) ST32(p, bswap_32(d)) + +# define AV_RL32(x) LD32(x) +# define AV_WL32(p, d) ST32(p, d) +# endif +#else /* HAVE_FAST_UNALIGNED */ #define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \ (((uint8_t*)(x))[1] << 16) | \ (((uint8_t*)(x))[2] << 8) | \ @@ -96,5 +127,6 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed)); ((uint8_t*)(p))[1] = (d)>>8; \ ((uint8_t*)(p))[2] = (d)>>16; \ ((uint8_t*)(p))[3] = (d)>>24; } +#endif #endif /* INTREADWRITE_H */ |