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/*
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MAA2 v0.432 mod by A.SONY
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MAA2 v0.433 mod by A.SONY
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=========
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Updated version of the MAA antialising script from AnimeIVTC.
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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, YV16 and YV24 input.
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Requirements:
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   * AviSynth 2.6
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   * SangNom2 0.3+ (or not with ext_aa)
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   * FTurn (not necessarily required but will improve speed in avs not avs+)
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   * Masktools 2 beta or better
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Parameters:
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   + [int] mask (1)
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       *   0: Disable masking
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       *   1: Enable masking
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       *  -i: Enable masking with custom treshold
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   + [bool] chroma (false)
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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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       *   0: with mask=0 will not use any masktools function
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       *   1: sobel
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       *   2: min/max
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   + [val] ext_aa (undefined)
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       *   External aa clip or function to use it instead of Sangnom2, you can use nnedi3_resize16(Width*2, Height*2) then nnedi3_resize16(Width/2, Height/2) or ext_aa="""edi_rpow2(2,2, fwidth=width(c),fheight=Height(c), edi="eedi3", mclip=m,cshift="spline36resize")""" or something else according to your source
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*/
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function maa2(clip c, int "mask", bool "chroma", float "ss", int "aa", int "aac", int "threads", int "show", int "maskt", val "ext_aa", float "ss_h")
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{
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    chroma = Default(chroma, false)
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    mask   = Default(mask, 1)
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    maskt  = Default(maskt, 1)
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    mtresh = (mask < 0) ? -mask : 7
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    show   = Default(show, 0)
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    uv     = (chroma) ? 3 : 1
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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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    sisphbd = AvsPlusVersionNumber > 2294
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    sislumaonly = sisphbd  ? c.isy() : c.isy8()
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    sisfullchro = sisphbd  ? c.is444() : c.isyv24()
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    Assert(0 <= show <= 2, "MAA2: Parameter 'show' must be between 0 and 2")
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    defined(ext_aa) ? Assert((Isclip(ext_aa) || IsString(ext_aa)), "'ext_aa' only accepts clip or string") : nop()
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    # create mask
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    (mask != 0) ? Eval("""
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        m = (maskt != 1) ? c.mt_edge("min/max", 0, mtresh, 0, mtresh-6, u=uv, v=uv) : c.mt_edge("sobel", mtresh, mtresh, mtresh-6, mtresh-6, u=uv, v=uv)
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                      """) : nop()
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    # run sangnom2-based aa
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    defined(ext_aa) ? isclip(ext_aa) ? eval("c_aa = ext_aa") : eval("c_aa = c." + ext_aa)
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    \               : show != 1 ? Eval("""
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        prfu  = sisfullchro && chroma
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        cp_Y  = !(sislumaonly || prfu) ? sisphbd  ? c.ConvertToY() : c.ConvertToY8() : c
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        cp_U  = !(sislumaonly || prfu || show > 0) ? sisphbd  ? c.ExtractU() : c.UtoY8() : nop()
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        cp_V  = !(sislumaonly || prfu || show > 0) ? sisphbd  ? c.ExtractV() : c.VtoY8() : nop()
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        c_aa_Y = cp_Y.Sangnom2AA(ss, ss_h, threads, aa, aac)
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        c_aa_u = !(sislumaonly || prfu || show > 0) ? chroma ? cp_U.Sangnom2AA(ss, ss_h, threads, aac) : cp_U : nop()
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        c_aa_v = !(sislumaonly || prfu || show > 0) ? chroma ? cp_V.Sangnom2AA(ss, ss_h, threads, aac) : cp_V : nop()
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        c_aa = sislumaonly || prfu || show > 0 ? c_aa_Y : sisphbd  ? CombinePlanes(c_aa_Y,c_aa_u,c_aa_v,planes="YUV",sample_clip=c) : YToUV(c_aa_u, c_aa_v, c_aa_Y)
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                                       """) : nop()
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    # prepare chroma planes for mask overlay
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    (mask != 0) ? Eval("m = m.mt_inflate(u=uv, v=uv)") : nop()
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    (show == 1) ? Eval("""
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        c_aa = sislumaonly ? c.invert()
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                         \ : c.mt_lut("x 2 /", y=2, u=3, v=3)
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                         \ : c.mt_lut("x 2 /", use_expr=2, y=2, u=3, v=3)
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                       """) : \
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    (show == 2) ? Eval("""
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        c_aa = sislumaonly ? c_aa.invert()
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                         \ : c_aa.mt_lut("x 2 /", y=2, u=3, v=3)
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                         \ : c_aa.mt_lut("x 2 /", use_expr=2, y=2, u=3, v=3)
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                       """) : nop()
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    # merge aa'ed lines into source
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    (mask == 0) ? Eval("""
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        lastaa = maskt == 0 ? sislumaonly ? c_aa : c.mergeluma(c_aa) : c.mt_logic(c_aa, "and", y=4, u=2, v=2)
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        return lastaa
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                       """) : \
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    (show > 0) ? mt_merge(c, c_aa, m, luma=!sislumaonly) : Eval("""
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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", float "ss_h", int "threads", int "aa", int "aac")
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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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     w = c.width()
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     h = c.height()
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    aa_w = round(w*ss/2.0)*2
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    hasss_h = defined(ss_h)
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    hasss_h ? Assert(ss_h > 0, "MAA2: ss_h factor must be > 0") : nop()
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    ss_h = hasss_h ? ss_h : ss
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    aa_h = round(h*ss_h/2.0)*2
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    Assert(ss > 0, "MAA2: Supersampling factor must be > 0")
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    Assert(!(aa_w==w && aa_h==h), "MAA2: why do you use this filter then?!")
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    sisp   = IsAvsPlus
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    c
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    Eval("""
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    aa_h==h && aa_w!=w ? eval("try { sisp ? dontdoft : fTurnLeft() } catch(error_msg) { TurnLeft() }") : last
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    aa_h==h ? threads!=1 ? Eval("try { Spline36Resizemt(aa_h, aa_w, threads=threads) } catch(error_msg) { Spline36Resize(aa_h, aa_w) }") : Spline36Resize(aa_h, aa_w) : last
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    aa_h!=h ? threads!=1 ? Eval("try { Spline36Resizemt(aa_w, aa_h, threads=threads) } catch(error_msg) { Spline36Resize(aa_w, aa_h) }") : Spline36Resize(aa_w, aa_h) : last
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            SangNom2(threads=threads, aa=aa, aac=aac)
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    aa_h!=h && aa_w!=w ? eval("try { sisp ? dontdoft : fTurnLeft() } catch(error_msg) { TurnLeft() }") : last
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    aa_w==w ? last : aa_h!=h ? SangNom2(threads=threads, aa=aa, aac=aac) : last
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    aa_h!=h && aa_w==w ? threads!=1 ? Eval("try { Spline36Resizemt(c.width, c.height, threads=threads) } catch(error_msg) { Spline36Resize(c.width, c.height) }") : Spline36Resize(c.width, c.height) : last
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    aa_w!=w ? threads!=1 ? Eval("try { Spline36Resizemt(c.height, c.width, threads=threads) } catch(error_msg) { Spline36Resize(c.height, c.width) }") : Spline36Resize(c.height, c.width) : last
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    aa_w!=w ? eval("try { sisp ? dontdoft : fTurnRight() } catch(error_msg) { TurnRight() }") : last
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    """)
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}
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function maa2ee(clip c){c.maa2(mask=-7, maskt=2, chroma=true,ext_aa="""edi_rpow2(2,2, fwidth=width(c),fheight=Height(c), edi="eedi3", mclip=m,cshift="spline36resize",sclip="nnedi3",nnrep=true,bordfix=true)""")
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}