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00026 #ifndef AVUTIL_BSWAP_H
00027 #define AVUTIL_BSWAP_H
00028
00029 #include <stdint.h>
00030 #include "config.h"
00031 #include "attributes.h"
00032
00033 #if ARCH_ARM
00034 # include "arm/bswap.h"
00035 #elif ARCH_AVR32
00036 # include "avr32/bswap.h"
00037 #elif ARCH_BFIN
00038 # include "bfin/bswap.h"
00039 #elif ARCH_SH4
00040 # include "sh4/bswap.h"
00041 #elif ARCH_X86
00042 # include "x86/bswap.h"
00043 #endif
00044
00045 #ifndef bswap_16
00046 static av_always_inline av_const uint16_t bswap_16(uint16_t x)
00047 {
00048 x= (x>>8) | (x<<8);
00049 return x;
00050 }
00051 #endif
00052
00053 #ifndef bswap_32
00054 static av_always_inline av_const uint32_t bswap_32(uint32_t x)
00055 {
00056 x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
00057 x= (x>>16) | (x<<16);
00058 return x;
00059 }
00060 #endif
00061
00062 #ifndef bswap_64
00063 static inline uint64_t av_const bswap_64(uint64_t x)
00064 {
00065 #if 0
00066 x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
00067 x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
00068 return (x>>32) | (x<<32);
00069 #else
00070 union {
00071 uint64_t ll;
00072 uint32_t l[2];
00073 } w, r;
00074 w.ll = x;
00075 r.l[0] = bswap_32 (w.l[1]);
00076 r.l[1] = bswap_32 (w.l[0]);
00077 return r.ll;
00078 #endif
00079 }
00080 #endif
00081
00082
00083
00084
00085 #if HAVE_BIGENDIAN
00086 #define be2me_16(x) (x)
00087 #define be2me_32(x) (x)
00088 #define be2me_64(x) (x)
00089 #define le2me_16(x) bswap_16(x)
00090 #define le2me_32(x) bswap_32(x)
00091 #define le2me_64(x) bswap_64(x)
00092 #else
00093 #define be2me_16(x) bswap_16(x)
00094 #define be2me_32(x) bswap_32(x)
00095 #define be2me_64(x) bswap_64(x)
00096 #define le2me_16(x) (x)
00097 #define le2me_32(x) (x)
00098 #define le2me_64(x) (x)
00099 #endif
00100
00101 #endif