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Diffstat (limited to 'utils/tuning/libtuning/gradient.py')
-rw-r--r-- | utils/tuning/libtuning/gradient.py | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/utils/tuning/libtuning/gradient.py b/utils/tuning/libtuning/gradient.py new file mode 100644 index 00000000..5106f821 --- /dev/null +++ b/utils/tuning/libtuning/gradient.py @@ -0,0 +1,75 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# +# Copyright (C) 2022, Paul Elder <paul.elder@ideasonboard.com> +# +# gradient.py - Gradients that can be used to distribute or map numbers + +import libtuning as lt + +import math +from numbers import Number + + +# @brief Gradient for how to allocate pixels to sectors +# @description There are no parameters for the gradients as the domain is the +# number of pixels and the range is the number of sectors, and +# there is only one curve that has a startpoint and endpoint at +# (0, 0) and at (#pixels, #sectors). The exception is for curves +# that *do* have multiple solutions for only two points, such as +# gaussian, and curves of higher polynomial orders if we had them. +# +# \todo There will probably be a helper in the Gradient class, as I have a +# feeling that all the other curves (besides Linear and Gaussian) can be +# implemented in the same way. +class Gradient(object): + def __init__(self): + pass + + # @brief Distribute pixels into sectors (only in one dimension) + # @param domain Number of pixels + # @param sectors Number of sectors + # @return A list of number of pixels in each sector + def distribute(self, domain: list, sectors: list) -> list: + raise NotImplementedError + + # @brief Map a number on a curve + # @param domain Domain of the curve + # @param rang Range of the curve + # @param x Input on the domain of the curve + # @return y from the range of the curve + def map(self, domain: tuple, rang: tuple, x: Number) -> Number: + raise NotImplementedError + + +class Linear(Gradient): + # @param remainder Mode of handling remainder + def __init__(self, remainder: lt.Remainder = lt.Remainder.Float): + self.remainder = remainder + + def distribute(self, domain: list, sectors: list) -> list: + size = domain / sectors + rem = domain % sectors + + if rem == 0: + return [int(size)] * sectors + + size = math.ceil(size) + rem = domain % size + output_sectors = [int(size)] * (sectors - 1) + + if self.remainder == lt.Remainder.Float: + size = domain / sectors + output_sectors = [size] * sectors + elif self.remainder == lt.Remainder.DistributeFront: + output_sectors.append(int(rem)) + elif self.remainder == lt.Remainder.DistributeBack: + output_sectors.insert(0, int(rem)) + else: + raise ValueError + + return output_sectors + + def map(self, domain: tuple, rang: tuple, x: Number) -> Number: + m = (rang[1] - rang[0]) / (domain[1] - domain[0]) + b = rang[0] - m * domain[0] + return m * x + b |