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ttadec: use branchless unsigned-to-signed unfolding

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This commit is contained in:
Justin Ruggles
2012-02-16 21:51:03 -05:00
parent d7840529b6
commit f2a4559c77
1 changed files with 1 additions and 2 deletions
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libavcodec/tta.c
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@@ -396,8 +396,7 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
}
// extract coded value
#define UNFOLD(x) (((x)&1) ? (++(x)>>1) : (-(x)>>1))
*p = UNFOLD(value);
*p = 1 + ((value >> 1) ^ ((value & 1) - 1));
// run hybrid filter
ttafilter_process(filter, p);