solarCurve.avsi

/*
This function will exaggerate all differences in frame. It is useful for easier finding flaws.

The used curve is from Easy Compare ( https://greasyfork.org/en/scripts/397200-easy-compare ).
*/


### Usage ###
###
# solarCurve(clip c, int "t", float "k", bool "y", bool "u", bool "v")
###
## Parameters ##
#---------------
# clip c: The input clip.
# Must be in YUV planar format.
# 32-bit input is assumed full range.
#---------------
# t (default 7), k (default 5.5): Parameters for controlling the curve.
#---------------
# y (default true), u (default false), v (default false): Which plane to process.


Function solarCurve(clip c, int "t", float "k", bool "y", bool "u", bool "v")
{
    t = Default(t, 7)
    k = Default(k, 5.5)
    y = Default(y, true)
    u = Default(u, false)
    v = Default(v, false)    
    
    m = k * Pi() - 128.0 / t
    A = -1.0 / 4194304 * m
    B = 3.0 / 32768 * m
    _C = 1.0 / t
    
    Assert(IsPlanar(c) || !IsRGB(c), "solarCurve: clip must be in YUV planar format.")
    
    if (NumComponents(c) > 1)
    {
        c = (y) ? ExtractY(c) :
        \ (u) ? ExtractU(c) :
        \ ExtractV(c)
    }
    
    return (BitsPerComponent(c) != 32) ? mt_lut(c, "127.999 "+ String(A) +" x 3 ^ * "+ String(B) +" x 2 ^ * + "+ String(_C) +" x * + pi 2 / - sin * 127.5 +", scale_inputs="all") : \
    Expr(c, "127.999 "+ String(A) +" x 255 / 219 * 16 + 3 ^ * "+ String(B) +" x 255 / 219 * 16 + 2 ^ * + "+ String(_C) +" x 255 / 219 * 16 + * + pi 2 / - sin * 127.5 + 16 - 219 / 255 *", scale_inputs="floatf")
}

/*
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reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

  You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.

  The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
*/