+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("-m", "--builtin-mixing",
+ action="store_true",
+ help="Make the mixing of sounds manually (do it if the system cannot handle it correctly)")
+ 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
+ Config.builtin_mixing = args.builtin_mixing
+
+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)]