sws: fix copy case detection with gray8a.
Fixes gray_alpha.png Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -829,13 +829,14 @@ void ff_get_unscaled_swscale(SwsContext *c)
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if (srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
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c->swScale = uyvyToYuv422Wrapper;
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#define isPlanarGray(x) (isGray(x) && (x) != PIX_FMT_GRAY8A)
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/* simple copy */
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if ( srcFormat == dstFormat ||
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(srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P) ||
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(srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P) ||
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(isPlanarYUV(srcFormat) && isGray(dstFormat)) ||
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(isPlanarYUV(dstFormat) && isGray(srcFormat)) ||
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(isGray(dstFormat) && isGray(srcFormat)) ||
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(isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
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(isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
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(isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
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(isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
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c->chrDstHSubSample == c->chrSrcHSubSample &&
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c->chrDstVSubSample == c->chrSrcVSubSample &&
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