[FFmpeg-cvslog] avcodec/jpeglsdec: support PAL1-PAL7
Michael Niedermayer
git at videolan.org
Sun Mar 22 20:43:10 CET 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Mar 22 20:31:03 2015 +0100| [a089d567f10e45ac3501f1f9741077a5df401859] | committer: Michael Niedermayer
avcodec/jpeglsdec: support PAL1-PAL7
Fixes Ticket3933
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a089d567f10e45ac3501f1f9741077a5df401859
---
libavcodec/jpeglsdec.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c
index e85f511..e6fa01f 100644
--- a/libavcodec/jpeglsdec.c
+++ b/libavcodec/jpeglsdec.c
@@ -111,12 +111,20 @@ int ff_jpegls_decode_lse(MJpegDecodeContext *s)
if ((s->avctx->pix_fmt == AV_PIX_FMT_GRAY8 || s->avctx->pix_fmt == AV_PIX_FMT_PAL8) &&
(s->picture_ptr->format == AV_PIX_FMT_GRAY8 || s->picture_ptr->format == AV_PIX_FMT_PAL8)) {
uint32_t *pal = (uint32_t *)s->picture_ptr->data[1];
+ int shift = 0;
+
+ if (s->avctx->bits_per_raw_sample > 0 && s->avctx->bits_per_raw_sample < 8) {
+ maxtab = FFMIN(maxtab, (1<<s->avctx->bits_per_raw_sample)-1);
+ shift = 8 - s->avctx->bits_per_raw_sample;
+ }
+
s->picture_ptr->format =
s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
for (i=s->palette_index; i<=maxtab; i++) {
- pal[i] = 0;
+ uint8_t k = i << shift;
+ pal[k] = 0;
for (j=0; j<wt; j++) {
- pal[i] |= get_bits(&s->gb, 8) << (8*(wt-j-1));
+ pal[k] |= get_bits(&s->gb, 8) << (8*(wt-j-1));
}
}
s->palette_index = i;
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