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swscale/utils: If the source has no alpha then disable alpha blendaway

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-09-10 14:03:01 +02:00
parent dfd3fd67bb
commit 816cf5181e
1 changed files with 4 additions and 0 deletions
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4
libswscale/utils.c
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@ -1144,6 +1144,10 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
desc_src = av_pix_fmt_desc_get(srcFormat);
desc_dst = av_pix_fmt_desc_get(dstFormat);
// If the source has no alpha then disable alpha blendaway
if (c->src0Alpha)
c->alphablend = SWS_ALPHA_BLEND_NONE;
if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
if (!sws_isSupportedInput(srcFormat)) {