Add new configurations parameters

[perso/Immae/Projets/Python/MusicSampler.git] / helpers / __init__.py

# -*- coding: utf-8 -*-
import argparse
import sys
import os
import math
import sounddevice as sd

class Config:
    pass

def path():
    if getattr(sys, 'frozen', False):
        return sys._MEIPASS + "/"
    else:
        path = os.path.dirname(os.path.realpath(__file__))
        return path + "/../"

def parse_args():
    argv = sys.argv[1:]
    sys.argv = sys.argv[:1]
    if "--" in argv:
        index = argv.index("--")
        kivy_args = argv[index+1:]
        argv = argv[:index]

        sys.argv.extend(kivy_args)

    parser = argparse.ArgumentParser(
            description="A Music Sampler application.",
            formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("-c", "--config",
            default="config.yml",
            required=False,
            help="Config file to load")
    parser.add_argument("-l", "--latency",
            default="high",
            required=False,
            help="Latency: low, high or number of seconds")
    parser.add_argument("-b", "--blocksize",
            default=0,
            type=int,
            required=False,
            help="Blocksize: If not 0, the numbe of frames to take at each step for the mixer")
    parser.add_argument("-f", "--frame-rate",
            default=44100,
            type=int,
            required=False,
            help="Frame rate to play the musics")
    parser.add_argument("-x", "--channels",
            default=2,
            type=int,
            required=False,
            help="Number of channels to use")
    parser.add_argument("-s", "--sample-width",
            default=2,
            type=int,
            required=False,
            help="Sample width (number of bytes for each frame)")
    parser.add_argument("-V", "--version",
            action="version",
            help="Displays the current version and exits. Only use in bundled package",
            version=show_version())
    parser.add_argument("--device",
            action=SelectDeviceAction,
            help="Select this sound device"
            )
    parser.add_argument("--list-devices",
            nargs=0,
            action=ListDevicesAction,
            help="List available sound devices"
            )
    parser.add_argument('--',
            dest="args",
            help="Kivy arguments. All arguments after this are interpreted by Kivy. Pass \"-- --help\" to get Kivy's usage.")
    args = parser.parse_args(argv)

    Config.yml_file = args.config
    Config.latency = args.latency
    Config.blocksize = args.blocksize
    Config.frame_rate = args.frame_rate
    Config.channels = args.channels
    Config.sample_width = args.sample_width

class SelectDeviceAction(argparse.Action):
    def __call__(self, parser, namespace, values, option_string=None):
        sd.default.device = values

class ListDevicesAction(argparse.Action):
    nargs = 0
    def __call__(self, parser, namespace, values, option_string=None):
        print(sd.query_devices())
        sys.exit()

def show_version():
    if getattr(sys, 'frozen', False):
        with open(path() + ".pyinstaller_commit", "r") as f:
            return f.read()
    else:
        return "option '-v' can only be used in bundled package"

def duration_to_min_sec(duration):
    minutes = int(duration / 60)
    seconds = int(duration) % 60
    if minutes < 100:
        return "{:2}:{:0>2}".format(minutes, seconds)
    else:
        return "{}:{:0>2}".format(minutes, seconds)

def gain(volume, old_volume = None):
    if old_volume is None:
        return 20 * math.log10(volume / 100)
    else:
        return [20 * math.log10(max(volume, 0.1) / max(old_volume, 0.1)), max(volume, 0)]