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vf_blend: Use integers for divide mode

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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.
This commit is contained in:
Timothy Gu 2016-02-14 02:15:18 +00:00
parent 4b750104ea
commit a678d66781
1 changed files with 2 additions and 2 deletions
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4
libavfilter/vf_blend.c
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@ -247,7 +247,7 @@ 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))
@ -287,7 +287,7 @@ 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))