[media] vivid-tpg: don't add offset when switching to monochrome
The grayscale values are still full range sRGB, so don't add the limited range offset. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -530,7 +530,7 @@ static void precalculate_color(struct tpg_data *tpg, int k)
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if (tpg->qual == TPG_QUAL_GRAY) {
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/* Rec. 709 Luma function */
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/* (0.2126, 0.7152, 0.0722) * (255 * 256) */
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r = g = b = ((13879 * r + 46688 * g + 4713 * b) >> 16) + (16 << 4);
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r = g = b = (13879 * r + 46688 * g + 4713 * b) >> 16;
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}
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/*
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