On 2/14/16, Timothy Gu <timothyg...@gmail.com> wrote: > 2.5x faster for 8-bit mode without autovectorization in GCC, 2x > slower with it on x86. However, since the platforms we enable GCC > autovectorization on most probably has support for SSE2 > optimization (added in the subsequent commit), this commit should > in general do good. > --- > libavfilter/vf_blend.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/libavfilter/vf_blend.c b/libavfilter/vf_blend.c > index 2b734b4..b9e5add 100644 > --- a/libavfilter/vf_blend.c > +++ b/libavfilter/vf_blend.c > @@ -240,7 +240,7 @@ DEFINE_BLEND8(hardlight, (B < 128) ? MULTIPLY(2, B, A) > : SCREEN(2, B, A)) > DEFINE_BLEND8(hardmix, (A < (255 - B)) ? 0: 255) > DEFINE_BLEND8(darken, FFMIN(A, B)) > DEFINE_BLEND8(lighten, FFMAX(A, B)) > -DEFINE_BLEND8(divide, av_clip_uint8(((float)A / ((float)B) * 255))) > +DEFINE_BLEND8(divide, av_clip_uint8(B == 0 ? 255 : 255 * A / B)) > DEFINE_BLEND8(dodge, DODGE(A, B)) > DEFINE_BLEND8(burn, BURN(A, B)) > DEFINE_BLEND8(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * > (0.5 - fabs(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - fabs(B > - 127.5)/255)) > @@ -280,7 +280,7 @@ DEFINE_BLEND16(hardlight, (B < 32768) ? MULTIPLY(2, B, > A) : SCREEN(2, B, A)) > DEFINE_BLEND16(hardmix, (A < (65535 - B)) ? 0: 65535) > DEFINE_BLEND16(darken, FFMIN(A, B)) > DEFINE_BLEND16(lighten, FFMAX(A, B)) > -DEFINE_BLEND16(divide, av_clip_uint16(((float)A / ((float)B) * 65535))) > +DEFINE_BLEND16(divide, av_clip_uint16(B == 0 ? 65535 : 65535 * A / B)) > DEFINE_BLEND16(dodge, DODGE(A, B)) > DEFINE_BLEND16(burn, BURN(A, B)) > DEFINE_BLEND16(softlight, (A > 32767) ? B + (65535 - B) * (A - 32767.5) / > 32767.5 * (0.5 - fabs(B - 32767.5) / 65535): B - B * ((32767.5 - A) / > 32767.5) * (0.5 - fabs(B - 32767.5)/65535)) > -- > 2.1.4 > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >
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