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x86/vf_blend: Add SSE2 optimization for screen
10x faster than C. Reviewed-by: Paul B Mahol <onemda@gmail.com>
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@ -111,6 +111,13 @@ BLEND_END
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psrlw %1, 8 ; 00xx00xx a * b / 255
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%endmacro
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%macro SCREEN 4 ; a, b, pw_1, pw_255
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pxor %1, %4 ; 00xx00xx 255 - a
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pxor %2, %4
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MULTIPLY %1, %2, %3
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pxor %1, %4 ; 00xx00xx 255 - x / 255
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%endmacro
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BLEND_INIT multiply, 4
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pxor m2, m2
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mova m3, [pw_1]
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@ -134,6 +141,28 @@ BLEND_INIT multiply, 4
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jl .loop
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BLEND_END
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BLEND_INIT screen, 5
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pxor m2, m2
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mova m3, [pw_1]
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mova m4, [pw_255]
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.nextrow:
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mov xq, widthq
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.loop:
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movh m0, [topq + xq] ; 0000xxxx
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movh m1, [bottomq + xq]
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punpcklbw m0, m2 ; 00xx00xx
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punpcklbw m1, m2
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SCREEN m0, m1, m3, m4
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packuswb m0, m0 ; 0000xxxx
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movh [dstq + xq], m0
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add xq, mmsize / 2
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jl .loop
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BLEND_END
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BLEND_INIT average, 3
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pxor m2, m2
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.nextrow:
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@ -37,6 +37,7 @@ BLEND_FUNC(and, sse2)
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BLEND_FUNC(darken, sse2)
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BLEND_FUNC(difference128, sse2)
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BLEND_FUNC(multiply, sse2)
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BLEND_FUNC(screen, sse2)
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BLEND_FUNC(hardmix, sse2)
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BLEND_FUNC(lighten, sse2)
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BLEND_FUNC(or, sse2)
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@ -65,6 +66,7 @@ av_cold void ff_blend_init_x86(FilterParams *param, int is_16bit)
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case BLEND_MULTIPLY: param->blend = ff_blend_multiply_sse2; break;
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case BLEND_OR: param->blend = ff_blend_or_sse2; break;
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case BLEND_PHOENIX: param->blend = ff_blend_phoenix_sse2; break;
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case BLEND_SCREEN: param->blend = ff_blend_screen_sse2; break;
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case BLEND_SUBTRACT: param->blend = ff_blend_subtract_sse2; break;
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case BLEND_XOR: param->blend = ff_blend_xor_sse2; break;
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case BLEND_DIFFERENCE: param->blend = ff_blend_difference_sse2; break;
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