Herwig Birke
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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/*
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* This does the same as getbits.c but with defines to
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* force inlining
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*/
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#define mpg123_backbits(nob) \
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do { \
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bsi.bitindex -= nob; \
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bsi.wordpointer += (bsi.bitindex >> 3); \
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bsi.bitindex &= 0x7; \
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} while (0)
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#define mpg123_getbitoffset() ((-bsi.bitindex) & 0x7)
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#define mpg123_getbyte() (*bsi.wordpointer++)
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#define mpg123_getbits(nob) \
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(rval = bsi.wordpointer[0], \
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rval <<= 8, \
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rval |= bsi.wordpointer[1], \
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rval <<= 8, \
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rval |= bsi.wordpointer[2], \
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rval <<= bsi.bitindex, \
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rval &= 0xffffff, \
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bsi.bitindex += (nob), \
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rval >>= (24-(nob)), \
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bsi.wordpointer += (bsi.bitindex>>3), \
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bsi.bitindex &= 7, \
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rval)
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#define mpg123_getbits_fast(nob) \
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(rval = (unsigned char) (bsi.wordpointer[0] << bsi.bitindex), \
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rval |= ((unsigned long) bsi.wordpointer[1] << bsi.bitindex) >> 8, \
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rval <<= (nob), \
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rval >>= 8, \
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bsi.bitindex += (nob), \
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bsi.wordpointer += (bsi.bitindex >> 3), \
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bsi.bitindex &= 7, \
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rval)
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#define mpg123_get1bit() \
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(rval_uc = *bsi.wordpointer << bsi.bitindex, \
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bsi.bitindex++, \
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bsi.wordpointer += (bsi.bitindex>>3), \
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bsi.bitindex &= 7, \
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rval_uc >> 7)
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