Feature Request: add adaptive grain filter

# Imports

import os

import sys

import vapoursynth as vs

core = vs.get_core()

# Loading Plugins

core.std.LoadPlugin(path="I:/Hybrid/64bit/vsfilters/GrainFilter/AdaptiveGrain/adaptivegrain_rs.dll")

core.std.LoadPlugin(path="I:/Hybrid/64bit/vsfilters/GrainFilter/AddGrain/AddGrain.dll")

core.std.LoadPlugin(path="I:/Hybrid/64bit/vsfilters/SourceFilter/LSmashSource/vslsmashsource.dll")

# source: 'F:\TestClips&Co\files\10bit Test.mkv'

# current color space: YUV420P10, bit depth: 10, resolution: 640x352, fps: 25, color matrix: 470bg, yuv luminance scale: limited, scanorder: progressive

# Loading F:\TestClips&Co\files\10bit Test.mkv using LWLibavSource

clip = core.lsmas.LWLibavSource(source="F:/TestClips&Co/files/10bit Test.mkv", format="YUV420P10", cache=0)

# making sure input color matrix is set as 470bg

clip = core.resize.Point(clip, matrix_in_s="470bg",range_s="limited")

# making sure frame rate is set to 25

clip = core.std.AssumeFPS(clip=clip, fpsnum=25, fpsden=1)

# Setting color range to TV (limited) range.

clip = core.std.SetFrameProp(clip=clip, prop="_ColorRange", intval=1)



# adding Grain using AdaptiveGrain

clip = core.std.PlaneStats(clipa=clip) # calculate stats

mask = core.adg.Mask(clip=clip, luma_scaling=12) # calculate mask

grained = core.grain.Add(clip, var=0.25, constant=True) # create grained version

clip = core.std.MaskedMerge(clip, grained, mask) # only use grained version according to mask



# adjusting output color from: YUV420P10 to YUV420P8 for x264Model (i420@10)

clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P8, range_s="limited")

# set output frame rate to 25.000fps

clip = core.std.AssumeFPS(clip=clip, fpsnum=25, fpsden=1)

# Output

clip.set_output()