[FFmpeg-cvslog] avfilter/vf_spp: Add dummy element to array to avoid shift
Andreas Rheinhardt
git at videolan.org
Sun Sep 19 06:14:30 EEST 2021
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Mon Sep 13 18:04:57 2021 +0200| [e424d1f557271d506336345b9b3da0a20ef3eaf3] | committer: Andreas Rheinhardt
avfilter/vf_spp: Add dummy element to array to avoid shift
Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e424d1f557271d506336345b9b3da0a20ef3eaf3
---
libavfilter/vf_spp.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libavfilter/vf_spp.c b/libavfilter/vf_spp.c
index 6c15dbaf66..b9b5f7bc78 100644
--- a/libavfilter/vf_spp.c
+++ b/libavfilter/vf_spp.c
@@ -93,7 +93,8 @@ DECLARE_ALIGNED(8, static const uint8_t, ldither)[8][8] = {
{ 42, 26, 38, 22, 41, 25, 37, 21 },
};
-static const uint8_t offset[127][2] = {
+static const uint8_t offset[128][2] = {
+ {0,0}, // unused
{0,0},
{0,0}, {4,4}, // quality = 1
{0,0}, {2,2}, {6,4}, {4,6}, // quality = 2
@@ -283,8 +284,8 @@ static void filter(SPPContext *p, uint8_t *dst, uint8_t *src,
qp = FFMAX(1, ff_norm_qscale(qp, p->qscale_type));
}
for (i = 0; i < count; i++) {
- const int x1 = x + offset[i + count - 1][0];
- const int y1 = y + offset[i + count - 1][1];
+ const int x1 = x + offset[i + count][0];
+ const int y1 = y + offset[i + count][1];
const int index = x1 + y1*linesize;
p->dct->get_pixels_unaligned(block, p->src + sample_bytes*index, sample_bytes*linesize);
p->dct->fdct(block);
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