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commit a167248c4d9caea103ec01d26f45bde246f4ba38 Author: Niklas Haas <[email protected]> AuthorDate: Tue Aug 4 12:29:19 2026 +0200 Commit: Niklas Haas <[email protected]> CommitDate: Sun Aug 9 21:03:33 2026 +0200 swscale/ops_memcpy: omit memcpy() if src and dst are identical This allows already referenced planes to be skipped (and avoids UB in this case). Note that this is already safe for the other backends, because reading from and writing to the same pointer via e.g. AVX operations is also effectively a no-op. See-Also: 1e071c8585467539d48cb33f239811309eed46a0 Signed-off-by: Niklas Haas <[email protected]> --- libswscale/ops_memcpy.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libswscale/ops_memcpy.c b/libswscale/ops_memcpy.c index 2cbe8f314b..5940381ea0 100644 --- a/libswscale/ops_memcpy.c +++ b/libswscale/ops_memcpy.c @@ -57,6 +57,9 @@ static void process(const SwsOpExec *exec, const void *priv, memset(out, p->clear_value[i], bytes); out += exec->out_stride[i]; } + } else if (out == exec->in[idx]) { + av_assert1(exec->out_stride[i] == exec->in_stride[idx]); + continue; /* plane was already ref'd */ } else if (exec->out_stride[i] == exec->in_stride[idx] && !use_loop) { memcpy(out, exec->in[idx], exec->out_stride[i] * lines); } else { _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
