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/*
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MAA2 v0.41 mod
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MAA2+ v0.42 mod
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=========
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Updated version of the MAA antialising script from AnimeIVTC. 
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Updated version of the MAA antialising script from AnimeIVTC.
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MAA2 uses tp7's SangNom2 and FTurn, which provide a nice speedup for SangNom-based antialiasing,
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MAA2 uses tp7's SangNom2, which provide a nice speedup for SangNom-based antialiasing,
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especially when only processing the luma plane.
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The defaults of MAA2 match up with MAA, so you'll get identical output (save for the more accurate border region processing of SangNom2)
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when using this script as a drop-in replacement.
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MAA2 supports Y8, YV12 and YV24 input.
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MAA2 supports Y8, YV12, YV16 and YV24 input.
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Requirements:
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   * AviSynth 2.6a4
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   * AviSynth+
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   * SangNom2 0.3+
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   * FTurn
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   * Masktools 2.0b1
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   * Masktools 2.0a48
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   + [int] mask (1)
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   + [int] mask (-200)
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       *   1: Enable masking
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       *   1: Enable masking 
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       *  -i: Enable masking with custom treshold
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       *  -i: Enable masking with custom treshold (sensible values are between 0 and 30)
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       *   false: Don't process chroma channels (copy UV from the source clip if present)
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       *   true: Process chroma channels
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   + [float] ss (2.0)
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       *   Supersampling factor (sensible values are between 2.0 and 4.0 for HD content)
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   + [int] aa (48)
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       *   Sangnom2 luma antialiasing strength
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   + [int] aac (aa-8)
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       *   Sangnom2 chroma antialiasing strength
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   + [int] threads (4)
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       *   Number of threads used by every Sangnom2 instance
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   + [int] show (0)
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       *   0: Don't overlay mask
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       *   1: Overlay mask only
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       *   2: Overlay mask and run antialiasing on the luma plane
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   + [int] maskt (1)
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       *   1: sobel
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       *   2: min/max
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function maa2(clip c, int "mask", bool "chroma", float "ss", int "aa", int "aac", int "threads", int "show") 
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function maa2(clip c, int "mask", bool "chroma", float "ss", int "aa", int "aac", int "threads", int "show", int "maskt")
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    mask = Default(mask, -200)
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    chroma = Default(chroma, false)
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    show = Default(show, 0)
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    mask   = Default(mask, 1)
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    uv = (chroma) ? 3 : 1
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    maskt   = Default(maskt, 1)
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    mtresh = (mask < 0) ? -mask : 7
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    Assert(c.IsY8 || c.IsYV12 || c.IsYV24, "MAA2: Input must be Y8, YV12 or YV24")
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    show   = Default(show, 0)
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    uv     = (chroma) ? 3 : 1
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    m = (mask != 0) ? c.mt_edge("min/max",0,mtresh,0,mtresh-6,u=uv,v=uv).mt_inflate(u=uv,v=uv) : nop()
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    Assert(c.IsY8 || c.IsYV12 || c.IsYV24 || c.IsYV16, "MAA2: Input must be Y8, YV12, YV16 or YV24")
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    Assert(0 <= show <= 2, "MAA2: Parameter 'show' must be between 0 and 2")
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    c_aa = (chroma && show==0) ? c.Sangnom2AA(ss,aa,aac,threads) : c.ConvertToY8().Sangnom2AA(ss,aa,threads=threads)
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    # create mask
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    c_aa = (show==1) ? (c.IsY8) ? c_aa.ConvertToYV12().mt_lut(y=2, u=0,v=0)
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    if (mask != 0) {
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                              \ : c.mt_lut("x 2 /", y=2, u=3,v=3)
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        m = (maskt != 1) ? c.mt_edge("min/max", 0, mtresh, 0, mtresh-6, u=uv, v=uv).mt_inflate(u=uv, v=uv) : c.mt_edge("sobel", mtresh, mtresh, mtresh-6, mtresh-6, u=uv, v=uv).mt_inflate(u=uv, v=uv)
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       \ : (show==2) ? (c.IsY8) ? c_aa.ConvertToYV12().mt_lut(y=2, u=0,v=0) 
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    }
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                              \ : YtoUV(c.UtoY8(), c.VtoY8(), c_aa).mt_lut("x 2 /", y=2, u=3,v=3) 
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       \ : c_aa
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    # run sangnom2-based aa
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    if (!chroma || show > 0) {
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    return (mask !=0) ? (show > 0) ? (c.IsYV24) ? mt_merge(c,c_aa,m.YtoUV(m,m),u=3,v=3)
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        c_aa = c.ConvertToY8().Sangnom2AA(ss, aa, threads=threads)
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                                              \ : mt_merge(c.ConvertToYV12(),c_aa,m,u=3,v=3, luma=true)
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    }
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                    \ : (chroma) ? mt_merge(c,c_aa,m,u=3,v=3)
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    else if (c.IsYV16) {
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                    \ : mt_merge(c,c_aa,m,u=2,v=2)
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        c_aa_u = c.UtoY8().Sangnom2AA(ss, aac, threads=threads)
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      \ : c.mt_logic(c_aa,"and", y=4, u=2, v=2)
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        c_aa_v = c.VtoY8().Sangnom2AA(ss, aac, threads=threads)
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        c_aa = YToUV(c_aa_u, c_aa_v, c.ConvertToY8().Sangnom2AA(ss, aa, threads=threads))
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    }
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    else { c_aa = c.Sangnom2AA(ss, aa, aac, threads) }
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    threads = Default(threads, 4)     
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    # prepare chroma planes for mask overlay
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    if (show == 1) {
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        c_aa = (c.IsY8) ? c.ConvertToYV12().mt_lut(y=2, u=0, v=0)
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    aac = (aac<0) ? 0 : aac 
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                      \ : c.mt_lut("x 2 /", y=2, u=3, v=3)
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    }
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    else if (show == 2) {
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        c_aa = (c.IsY8) ? c_aa.ConvertToYV12().mt_lut(y=2, u=0, v=0)
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                      \ : YtoUV(c.UtoY8(), c.VtoY8(), c_aa).mt_lut("x 2 /", y=2, u=3, v=3)
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    }
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    return c.Spline36Resize(ss_w,ss_h).FTurnLeft() \
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    # merge aa'ed lines into source
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            .SangNom2(threads=threads, aa=aa, aac=aac).FTurnRight().SangNom2(threads=threads, aa=aa, aac=aac).Spline36Resize(c.width,c.height)
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    if (mask == 0) {
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        return mt_logic(c_aa, "and", y=4, u=2, v=2)
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    }
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    else if (show > 0) {
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        if (c.IsYV16) {
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            m_uv = BilinearResize(m, m.width/2, m.height)
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            return mt_merge(c, c_aa, YtoUV(m_uv, m_uv, m), u=3, v=3)
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        }
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        else {
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            return (c.IsYV24) ? mt_merge(c, c_aa, m.YtoUV(m,m), u=3, v=3)
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                            \ : mt_merge(c.ConvertToYV12(), c_aa, m, u=3, v=3, luma=true)
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        }
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    }
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    else {
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        return (chroma) ? mt_merge(c, c_aa, m, u=3, v=3)
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                      \ : mt_merge(c, c_aa, m, u=2, v=2)
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    }
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}
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function Sangnom2AA(clip c, float "ss", int "aa", int "aac", int "threads")
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{
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    threads = Default(threads, 4)
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    aa = Default(aa, 48)
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    aac = Default(aac, aa-8)
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    aac = (aac < 0) ? 0 : aac
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    ss = Default(ss, 2.0)
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    ss_w = int(round(c.width*ss/4.0)*4)
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    ss_h = int(round(c.height*ss/4.0)*4)
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    Assert(ss > 0, "MAA2: Supersampling factor must be > 0")
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    return c.Spline36Resize(ss_w, ss_h).TurnLeft() \
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            .SangNom2(threads=threads, aa=aa, aac=aac).TurnRight().SangNom2(threads=threads, aa=aa, aac=aac).Spline36Resize(c.width, c.height)
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}