jpg: fix colors for sequential RGB

Fixes Ticket850 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

jpg: fix colors for sequential RGB
Fixes Ticket850 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
7594ee2e · Carl Eugen Hoyos · Michael Niedermayer · 0f6f5e6f · 7594ee2e
Commit 7594ee2e authored Mar 18, 2012 by Carl Eugen Hoyos Committed by Michael Niedermayer Mar 18, 2012
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mjpegdec.c libavcodec/mjpegdec.c +2 -0

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--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -1168,6 +1168,8 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,

        if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == PIX_FMT_GBR24P)
            index = (i+2)%3;
+        if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == PIX_FMT_GBR24P)
+            index = (index+2)%3;

        s->comp_index[i] = index;