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avcodec/jpeglsdec: Set alpha plane in PAL8 so image is not 100% transparent 

Fixes: tickets/3933/128.jls

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 011006874c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-05-02 15:49:55 +02:00
parent c1d8652b5b
commit 93506a7bf7
1 changed files with 1 additions and 1 deletions
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2
libavcodec/jpeglsdec.c
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@ -122,7 +122,7 @@ int ff_jpegls_decode_lse(MJpegDecodeContext *s)
s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
for (i=s->palette_index; i<=maxtab; i++) {
uint8_t k = i << shift;
pal[k] = 0;
pal[k] = wt < 4 ? 0xFF000000 : 0;
for (j=0; j<wt; j++) {
pal[k] |= get_bits(&s->gb, 8) << (8*(wt-j-1));
}