[FFmpeg-cvslog] avcodec/tiff: Factor constant computation out of inner loop
Michael Niedermayer
git at videolan.org
Tue Apr 11 19:01:44 EEST 2017
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Apr 11 03:37:35 2017 +0200| [cd8e62746fedd1f593a9d441bd3a4ea137c919bb] | committer: Michael Niedermayer
avcodec/tiff: Factor constant computation out of inner loop
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cd8e62746fedd1f593a9d441bd3a4ea137c919bb
---
libavcodec/tiff.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 3aaf63338d..cb1a34e73a 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -1362,10 +1362,11 @@ static int decode_frame(AVCodecContext *avctx,
}
if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {
+ int c = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255);
dst = p->data[plane];
for (i = 0; i < s->height; i++) {
for (j = 0; j < stride; j++)
- dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
+ dst[j] = c - dst[j];
dst += stride;
}
}
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