# pycmx
# (c) 2025 Jamie Hardt
from dataclasses import dataclass
from typing import Generic, NamedTuple, TypeVar
T = TypeVar('T')
[docs]
@dataclass
class Rgb(Generic[T]):
"""
A tuple of three `T`s, where each is the respective red, green and blue
values of interest.
"""
red: T # : Red component
green: T # : Green component
blue: T # : Blue component
[docs]
@dataclass
class AscSopComponents(Generic[T]):
"""
Fields in an ASC SOP (Slope-Offset-Power) color transfer function
statement.
The ASC SOP is a transfer function of the form:
:math:`y_{color} = (ax_{color} + b)^p`
for each color component the source, where the `slope` is `a`, `offset`
is `b` and `power` is `p`.
"""
slope: Rgb[T] # : The linear/slope component `a`
offset: Rgb[T] # : The constant/offset component `b`
power: Rgb[T] # : The exponential/power component `p`
[docs]
class FramecountTriple(NamedTuple):
"""
Fields in an FRMC statement
"""
start: int
end: int
duration: int