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swscale/utils: Use full chroma interpolation for rgb4/8 and dither none

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Dither none is only implemented in full chroma interpolation for these rgb formats
Its also a obscure choice (producing less nice images) that implementing it in the
other code-paths makes no sense

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-07-08 13:18:34 +02:00
parent 7528532550
commit fa1e158ef6
1 changed files with 1 additions and 1 deletions
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2
libswscale/utils.c
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@ -1330,7 +1330,7 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
if (c->dither == SWS_DITHER_AUTO)
c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
if (!(flags & SWS_FULL_CHR_H_INT)) {
if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) {
if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER || c->dither == SWS_DITHER_NONE) {
av_log(c, AV_LOG_DEBUG,
"Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
av_get_pix_fmt_name(dstFormat));