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new 8b9e02cc17 avfilter/vf_convolution: don't assume frame is multiple of
16 pixels wide
8b9e02cc17 is described below
commit 8b9e02cc17126bf42416624e0fea329aa42126b0
Author: Timo Rothenpieler <[email protected]>
AuthorDate: Fri Sep 25 22:55:01 2026 +0200
Commit: Timo Rothenpieler <[email protected]>
CommitDate: Mon Sep 28 23:13:14 2026 +0000
avfilter/vf_convolution: don't assume frame is multiple of 16 pixels wide
Limit the 8-bit column filter to the pixels remaining in the current slice.
Pass slice_end - y at all three call sites so both the 8-bit and high-bit-depth
column filters receive the correct remaining width. This handles partial
16-pixel blocks at frame and thread-slice boundaries. The non-column callbacks
do not use this argument.
Fixes: #YWH-PGM40646-36
---
libavfilter/vf_convolution.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/libavfilter/vf_convolution.c b/libavfilter/vf_convolution.c
index 70cbe28475..cc55beb0be 100644
--- a/libavfilter/vf_convolution.c
+++ b/libavfilter/vf_convolution.c
@@ -494,16 +494,17 @@ static void filter_column(uint8_t *dst, int height,
int dstride, int stride, int size)
{
DECLARE_ALIGNED(64, unsigned, sum)[16];
+ const int width = FFMIN(16, size);
for (int y = 0; y < height; y++) {
memset(sum, 0, sizeof(sum));
for (int i = 0; i < 2 * radius + 1; i++) {
- for (int off16 = 0; off16 < 16; off16++)
+ for (int off16 = 0; off16 < width; off16++)
sum[off16] += (unsigned)c[i][0 + y * stride + off16] *
matrix[i];
}
- for (int off16 = 0; off16 < 16; off16++) {
+ for (int off16 = 0; off16 < width; off16++) {
dst[off16] = av_clip_uint8((int)sum[off16] * rdiv + bias + 0.5f);
}
dst += dstride;
@@ -612,12 +613,12 @@ static int filter_slice(AVFilterContext *ctx, void *arg,
int jobnr, int nb_jobs)
s->setup[plane](radius, c, src, stride, x, width, y, height,
bpc);
s->filter[plane](dst + yoff + xoff, 1, rdiv,
bias, matrix, c, s->max, radius,
- dstride, stride, slice_end - step);
+ dstride, stride, slice_end - y);
}
s->setup[plane](radius, c, src, stride, left, width, y, height,
bpc);
s->filter[plane](dst + yoff + xoff, right - left,
rdiv, bias, matrix, c, s->max, radius,
- dstride, stride, slice_end - step);
+ dstride, stride, slice_end - y);
for (x = right; x < sizew; x++) {
const int xoff = mode == MATRIX_COLUMN ? (y - slice_start) *
bpc : x * bpc;
const int yoff = mode == MATRIX_COLUMN ? x * dstride : 0;
@@ -625,7 +626,7 @@ static int filter_slice(AVFilterContext *ctx, void *arg,
int jobnr, int nb_jobs)
s->setup[plane](radius, c, src, stride, x, width, y, height,
bpc);
s->filter[plane](dst + yoff + xoff, 1, rdiv,
bias, matrix, c, s->max, radius,
- dstride, stride, slice_end - step);
+ dstride, stride, slice_end - y);
}
if (mode != MATRIX_COLUMN)
dst += dstride;
--
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