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avfilter/vf_zscale: fix adding >8 bit alpha plane

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This commit is contained in:
Paul B Mahol 2023-09-28 22:43:23 +02:00
parent 086c280901
commit 0aa75a85e6
1 changed files with 10 additions and 2 deletions
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12
libavfilter/vf_zscale.c
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@ -901,14 +901,22 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
int x, y; int x, y;
if (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) { if (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) {
for (y = 0; y < out->height; y++) { for (y = 0; y < out->height; y++) {
const ptrdiff_t row = y * out->linesize[3];
for (x = 0; x < out->width; x++) { for (x = 0; x < out->width; x++) {
AV_WN32(out->data[3] + x * odesc->comp[3].step + y * out->linesize[3], AV_WN32(out->data[3] + x * odesc->comp[3].step + row,
av_float2int(1.0f)); av_float2int(1.0f));
} }
} }
} else { } else if (s->dst_format.depth == 8) {
for (y = 0; y < outlink->h; y++) for (y = 0; y < outlink->h; y++)
memset(out->data[3] + y * out->linesize[3], 0xff, outlink->w); memset(out->data[3] + y * out->linesize[3], 0xff, outlink->w);
} else {
const uint16_t max = (1 << s->dst_format.depth) - 1;
for (y = 0; y < outlink->h; y++) {
const ptrdiff_t row = y * out->linesize[3];
for (x = 0; x < out->width; x++)
AV_WN16(out->data[3] + x * odesc->comp[3].step + row, max);
}
} }
} }
} else { } else {