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sws: Only reset dither state for bitexact mode 

the output looks better with a random initial state than
all 0

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-19 01:40:10 +01:00
parent ca447592b1
commit 8045c0167d
1 changed files with 1 additions and 1 deletions
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2
libswscale/swscale.c
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@ -910,7 +910,7 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
src2[0] = base;
}
if (!srcSliceY && (c->flags & SWS_ERROR_DIFFUSION))
if (!srcSliceY && (c->flags & SWS_BITEXACT) && (c->flags & SWS_ERROR_DIFFUSION))
for (i = 0; i < 4; i++)
memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2));