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avfilter/vf_spp: Add dummy element to array to avoid shift

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-09-13 18:04:57 +02:00
parent a85d2de45f
commit e424d1f557
1 changed files with 4 additions and 3 deletions
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7
libavfilter/vf_spp.c
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@ -93,7 +93,8 @@ DECLARE_ALIGNED(8, static const uint8_t, ldither)[8][8] = {
{ 42, 26, 38, 22, 41, 25, 37, 21 }, { 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},
{0,0}, {4,4}, // quality = 1 {0,0}, {4,4}, // quality = 1
{0,0}, {2,2}, {6,4}, {4,6}, // quality = 2 {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)); qp = FFMAX(1, ff_norm_qscale(qp, p->qscale_type));
} }
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
const int x1 = x + offset[i + count - 1][0]; const int x1 = x + offset[i + count][0];
const int y1 = y + offset[i + count - 1][1]; const int y1 = y + offset[i + count][1];
const int index = x1 + y1*linesize; const int index = x1 + y1*linesize;
p->dct->get_pixels_unaligned(block, p->src + sample_bytes*index, sample_bytes*linesize); p->dct->get_pixels_unaligned(block, p->src + sample_bytes*index, sample_bytes*linesize);
p->dct->fdct(block); p->dct->fdct(block);