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ac3enc: make sym_quant() branch-free

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This commit is contained in:
Justin Ruggles 2011-03-22 14:36:18 -04:00
parent 45ed822550
commit 85ab290470
1 changed files with 1 additions and 11 deletions
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12
libavcodec/ac3enc.c
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@ -1096,17 +1096,7 @@ static int compute_bit_allocation(AC3EncodeContext *s)
*/ */
static inline int sym_quant(int c, int e, int levels) static inline int sym_quant(int c, int e, int levels)
{ {
int v; int v = ((((levels * c) >> (24 - e)) + 1) >> 1) + (levels >> 1);
if (c >= 0) {
v = (levels * (c << e)) >> 24;
v = (v + 1) >> 1;
v = (levels >> 1) + v;
} else {
v = (levels * ((-c) << e)) >> 24;
v = (v + 1) >> 1;
v = (levels >> 1) - v;
}
av_assert2(v >= 0 && v < levels); av_assert2(v >= 0 && v < levels);
return v; return v;
} }