import math


class SignalGenerator:
    def __init__(
        self,
        frequency,
        amplitude,
        sample_rate,
        output_range=(-1, 1),
        convert_to_int=False,
    ):
        self.phase = 0
        self.frequency = frequency
        self.amplitude = amplitude
        self.sample_rate = sample_rate
        self.output_range = output_range
        self.convert_to_int = convert_to_int

    def sample(self):
        sample = math.sin(self.phase * math.tau) * self.amplitude
        self.phase += self.frequency / self.sample_rate
        self.phase %= 1
        return (int if self.convert_to_int else float)(
            remap(sample, -1, 1, self.output_range[0], self.output_range[1])
        )

    def generate_samples(self, samples):
        return [self.sample() for _ in range(samples)]

    def generate_time(self, time):
        return self.generate_samples(round(time * self.sample_rate))


def remap(number, from_min, from_max, to_min, to_max):
    number_s = number - from_min
    from_max_s = from_max - from_min
    to_max_s = to_max - to_min
    return ((number_s / from_max_s) * to_max_s) + to_min


g = SignalGenerator(0, 1, 48000, (0, 255), True)

with open("input.raw", "rb") as f:
    data = list(f.read())

with open("output.raw", "wb+") as f:
    for d in data:
        g.frequency = ((d / 255) * 12500) + 4000
        f.write(bytes(g.generate_samples(6)))