32 lines
686 B
C
32 lines
686 B
C
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#ifndef FFMPEG_MATHOPS_FIX_H
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#define FFMPEG_MATHOPS_FIX_H
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#ifndef NEG_USR32
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# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
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#endif
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#ifndef NEG_SSR32
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# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
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#endif
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#ifndef sign_extend
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static inline av_const int sign_extend(int val, unsigned bits)
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{
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unsigned shift = 8 * sizeof(int) - bits;
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union { unsigned u; int s; } v = { (unsigned) val << shift };
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return v.s >> shift;
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}
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#endif
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#ifndef zero_extend
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static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
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{
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return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
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}
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#endif
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#ifndef SUINT
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#define SUINT unsigned
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#endif
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#endif
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