mirror of https://github.com/mpv-player/mpv
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
#ifndef __MP_BSWAP_H__
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#define __MP_BSWAP_H__
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#include "libavutil/common.h"
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#include "libavutil/bswap.h"
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static inline float bswap_flt(float x) {
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union {uint32_t i; float f;} u;
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u.f = x;
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u.i = bswap_32(u.i);
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return u.f;
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}
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static inline double bswap_dbl(double x) {
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union {uint64_t i; double d;} u;
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u.d = x;
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u.i = bswap_64(u.i);
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return u.d;
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}
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static inline long double bswap_ldbl(long double x) {
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union {char d[10]; long double ld;} uin;
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union {char d[10]; long double ld;} uout;
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uin.ld = x;
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uout.d[0] = uin.d[9];
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uout.d[1] = uin.d[8];
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uout.d[2] = uin.d[7];
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uout.d[3] = uin.d[6];
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uout.d[4] = uin.d[5];
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uout.d[5] = uin.d[4];
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uout.d[6] = uin.d[3];
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uout.d[7] = uin.d[2];
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uout.d[8] = uin.d[1];
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uout.d[9] = uin.d[0];
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return uout.ld;
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}
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// be2me ... BigEndian to MachineEndian
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// le2me ... LittleEndian to MachineEndian
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#ifdef WORDS_BIGENDIAN
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#define be2me_flt(x) (x)
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#define be2me_dbl(x) (x)
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#define be2me_ldbl(x) (x)
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#define le2me_flt(x) bswap_flt(x)
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#define le2me_dbl(x) bswap_dbl(x)
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#define le2me_ldbl(x) bswap_ldbl(x)
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#else
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#define be2me_flt(x) bswap_flt(x)
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#define be2me_dbl(x) bswap_dbl(x)
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#define be2me_ldbl(x) bswap_ldbl(x)
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#define le2me_flt(x) (x)
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#define le2me_dbl(x) (x)
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#define le2me_ldbl(x) (x)
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#endif
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#endif /* __MP_BSWAP_H__ */
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