MagicPodcast/generate_demuxer.py

import math
from find_loudness import process_find_loudness

graph_density = 44100
threshold_at_point = 1
inertia_s = 0.3
inertia_samples = inertia_s * graph_density
out_demuxer = 'demuxer.txt'


def set_up_threshold(new_value: int):
    """Setup threshold value"""
    global threshold_at_point
    if new_value > 0 and isinstance(new_value, int):
        threshold_at_point = int(new_value)
        return True
    else:
        return False


def s(n: int):
    """Frame conversions"""
    global graph_density
    return n / graph_density


def seconds(units: int):
    """Return seconds."""
    return math.floor(s(units) % 60)


def minutes(units: int):
    """Return minutes."""
    return math.floor(s(units) / 60)


def hours(units: int):
    """Return hours."""
    return math.floor(s(units) / 60 / 60)


def formatTime(units: int):
    """Format time HH:MM:SS."""
    return f"{hours(units)}:{minutes(units)}:{seconds(units)}"


def new_mode(m, s):
    """Set new node"""
    data = m
    data[s['label']] = s['loud']
    return data


def mode_to_string(mode):
    """Convert mode type to string"""
    if mode['left'] is True and mode['right'] is True:
        return 'both'
    elif mode['left'] is True:
        return 'left'
    elif mode['right'] is True:
        return 'right'
    else:
        return "none"


def run(tmp_dir):
    """Main method to run generating demuxer.txt"""
    global inertia_samples, out_demuxer

    with open(out_demuxer, 'w') as demuxer:
        # Execute process_find_loudness for left and right side
        left_loudness = process_find_loudness(
            tmp_dir + "/audio/leftraw",
            threshold_at_point=threshold_at_point,
            inertia_samples=inertia_samples,
            label="left")
        print("LEFT:", left_loudness)

        right_loudness = process_find_loudness(
            tmp_dir + "/audio/rightraw",
            threshold_at_point=threshold_at_point,
            inertia_samples=inertia_samples,
            label="right")
        print("RIGHT:", right_loudness)

        merged = [*left_loudness, *right_loudness]
        # print(merged)
        sorted_list = sorted(merged, key=lambda x: x['position_start'])
        # print(sorted_list)
        demuxer.write(F"file {tmp_dir}/pics/none.png\n")

        last_point = 0
        mode = {'left': False, 'right': False}
        last_file = ''
        total = 0

        for i in range(2, len(sorted_list)):
            point = sorted_list[i]
            mode = new_mode(m=mode, s=point)

            file = F"{tmp_dir}/pics/{mode_to_string(mode)}.png"
            duration = (point['position_start'] - last_point) / graph_density
            demuxer.write(F"duration {duration}\n")
            demuxer.write(F"file {file}\n")
            last_point = point['position_start']
            last_file = file
            total += duration * graph_density

        demuxer.write(F"duration {sorted_list[len(sorted_list) - 1]['duration'] / graph_density}\n")
        demuxer.write(F"file {last_file}\n")
        print(F"{total} {formatTime(total)}\n")