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commit 933b195bcb2cf1cd8e2c7ba0967452074f01e77d Author: Andreas Rheinhardt <[email protected]> AuthorDate: Wed Jul 22 11:34:40 2026 +0200 Commit: Andreas Rheinhardt <[email protected]> CommitDate: Sat Aug 1 16:50:06 2026 +0200 avcodec/vc1dsp: Avoid negating unnecessarily Due to the earlier "if (a1 < a0 || a2 < a0)" check it is guaranteed that min(a1,a2) is < a0, allowing simplifications. Signed-off-by: Andreas Rheinhardt <[email protected]> --- libavcodec/vc1dsp.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/libavcodec/vc1dsp.c b/libavcodec/vc1dsp.c index dd143b114c..355e4b8b02 100644 --- a/libavcodec/vc1dsp.c +++ b/libavcodec/vc1dsp.c @@ -166,17 +166,11 @@ static av_always_inline int vc1_filter_line(uint8_t *src, ptrdiff_t stride, int clip = ((clip ^ clip_sign) - clip_sign) >> 1; if (clip) { int a3 = FFMIN(a1, a2); - int d = 5 * (a3 - a0); - int d_sign = (d >> 31); + int d = (5 * (a0 - a3)) >> 3; - d = ((d ^ d_sign) - d_sign) >> 3; - d_sign ^= a0_sign; - - if (d_sign ^ clip_sign) - d = 0; - else { + if (a0_sign ^ clip_sign) { d = FFMIN(d, clip); - d = (d ^ d_sign) - d_sign; /* Restore sign */ + d = (d ^ clip_sign) - clip_sign; /* Restore sign */ src[-1 * stride] = av_clip_uint8(src[-1 * stride] - d); src[ 0 * stride] = av_clip_uint8(src[ 0 * stride] + d); } _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
