music_sampler/helpers.py

   1 # -*- coding: utf-8 -*-
   2 import argparse
   3 import sys
   4 import os
   5 import math
   6 import sounddevice as sd
   7 import logging
   8 import gettext
   9 import yaml
  10 gettext.install('music_sampler')
  11 Logger = logging.getLogger("kivy")
  12
  13 from . import sysfont
  14
  15 class Config:
  16     pass
  17
  18 def find_font(name, style=sysfont.STYLE_NONE):
  19     if getattr(sys, 'frozen', False):
  20         font = sys._MEIPASS + "/fonts/{}_{}.ttf".format(name, style)
  21     else:
  22         font = sysfont.get_font(name, style=style)
  23         if font is not None:
  24             font = font[4]
  25     return font
  26
  27 def register_fonts():
  28     from kivy.core.text import LabelBase
  29
  30     ubuntu_regular = find_font("Ubuntu", style=sysfont.STYLE_NORMAL)
  31     ubuntu_bold = find_font("Ubuntu", style=sysfont.STYLE_BOLD)
  32     symbola = find_font("Symbola")
  33
  34     if ubuntu_regular is None:
  35         error_print("Font Ubuntu regular could not be found, "
  36                 "please install it.", exit=True)
  37     if symbola is None:
  38         error_print("Font Symbola could not be found, please install it.",
  39                 exit=True)
  40     if ubuntu_bold is None:
  41         warn_print("Font Ubuntu Bold could not be found.")
  42
  43     LabelBase.register(name="Ubuntu",
  44             fn_regular=ubuntu_regular,
  45             fn_bold=ubuntu_bold)
  46     LabelBase.register(name="Symbola",
  47             fn_regular=symbola)
  48
  49
  50 def path():
  51     if getattr(sys, 'frozen', False):
  52         return sys._MEIPASS + "/"
  53     else:
  54         return os.path.dirname(os.path.realpath(__file__))
  55
  56
  57 Configs = {
  58     'music_path': {
  59         'abbr': '-p',
  60         'default': '.',
  61         'help': _("Folder in which to find the music files"),
  62         'type': None
  63     },
  64     'latency': {
  65         'abbr': '-l',
  66         'default': 'high',
  67         'help': _("Latency: low, high or number of seconds"),
  68         'type': None
  69     },
  70     'language': {
  71         'abbr': '-L',
  72         'default': "fr",
  73         'help': _("Select another language"),
  74         'type': None
  75     },
  76     'device': {
  77         'abbr': '-d',
  78         'default': None,
  79         'help': _("Select this sound device"),
  80         'type': None
  81     },
  82     'blocksize': {
  83         'abbr': '-b',
  84         'default': 0,
  85         'help': _("Blocksize: If not 0, the number of frames to take\
  86                     at each step for the mixer"),
  87         'type': int
  88     },
  89     'frame_rate': {
  90         'abbr': '-f',
  91         'default': 44100,
  92         'help': _("Frame rate to play the musics"),
  93         'type': int
  94     },
  95     'channels': {
  96         'abbr': '-x',
  97         'default': 2,
  98         'help': _("Number of channels to use"),
  99         'type': int
 100     },
 101     'sample_width': {
 102         'abbr': '-s',
 103         'default': 2,
 104         'help': _("Sample width (number of bytes for each frame)"),
 105         'type': int
 106     },
 107     'builtin_mixing': {
 108         'default': False,
 109         'help_yes': _("Make the mixing of sounds manually\
 110                     (do it if the system cannot handle it correctly)"),
 111         'help_no': _("Don't make the mixing of sounds manually (default)"),
 112         'type': 'boolean'
 113     },
 114     'debug': {
 115         'abbr': '-d',
 116         'default': False,
 117         'help_yes': _("Print messages in console"),
 118         'help_no': _("Don't print messages in console (default)"),
 119         'type': 'boolean'
 120     },
 121     'focus_warning': {
 122         'default': True,
 123         'help_yes': _("Show a warning when focus is lost (default)"),
 124         'help_no': _("Don't show warning when focus is lost"),
 125         'type': 'boolean'
 126     },
 127     'list_devices': {
 128         'help': _("List available sound devices"),
 129         'type': 'action'
 130     },
 131 }
 132 Configs_order = [
 133     'debug',
 134     'music_path',
 135     'builtin_mixing',
 136     'latency',
 137     'blocksize',
 138     'frame_rate',
 139     'channels',
 140     'sample_width',
 141     'focus_warning',
 142     'language',
 143     'list_devices',
 144     'device',
 145 ]
 146 def parse_args():
 147     argv = sys.argv[1 :]
 148     sys.argv = sys.argv[: 1]
 149     if "--" in argv:
 150         index = argv.index("--")
 151         kivy_args = argv[index+1 :]
 152         argv = argv[: index]
 153
 154         sys.argv.extend(kivy_args)
 155
 156     os.environ["KIVY_NO_CONFIG"] = 'true'
 157     sys.argv.extend(["-c", "kivy:log_level:warning"])
 158     sys.argv.extend(["-c", "kivy:log_dir:/tmp"])
 159     sys.argv.extend(["-c", "kivy:log_name:/tmp/music_sampler_%_.txt"])
 160
 161     parser = argparse.ArgumentParser(
 162             argument_default=argparse.SUPPRESS,
 163             description=_("A Music Sampler application."))
 164     parser.add_argument("-V", "--version",
 165             action="version",
 166             help=_("Displays the current version and exits. Only use\
 167                     in bundled package"),
 168             version=show_version())
 169     parser.add_argument("-c", "--config",
 170             default="config.yml",
 171             required=False,
 172             help=_("Config file to load (default: config.yml)"))
 173     for argument in Configs_order:
 174         arg = Configs[argument]
 175         if arg['type'] != 'boolean' and arg['type'] != 'action':
 176             parser.add_argument(arg['abbr'], '--' + argument.replace('_', '-'),
 177                     type=arg['type'],
 178                     help=arg['help']+_(" (default: {})").format(arg['default']))
 179         elif arg['type'] == 'boolean':
 180             parser.add_argument('--' + argument.replace('_', '-'),
 181                     action='store_const', const=True,
 182                     help=arg['help_yes'])
 183             parser.add_argument('--no-' + argument.replace('_', '-'),
 184                     action='store_const', const=True,
 185                     help=arg['help_no'])
 186         else:
 187             parser.add_argument('--' + argument.replace('_', '-'),
 188                     action='store_const', const=True,
 189                     help=arg['help'])
 190     parser.add_argument('--',
 191             dest="args",
 192             help=_("Kivy arguments. All arguments after this are interpreted\
 193                     by Kivy. Pass \"-- --help\" to get Kivy's usage."))
 194
 195     args = parser.parse_args(argv)
 196
 197     Config.yml_file = args.config
 198     build_config(args)
 199
 200     if Config.device is not None:
 201         sd.default.device = Config.device
 202
 203     if Config.list_devices:
 204         print(sd.query_devices())
 205         sys.exit()
 206
 207     if Config.debug:
 208         sys.argv.extend(["-c", "kivy:log_level:debug"])
 209
 210     if Config.language != 'en':
 211         gettext.translation("music_sampler",
 212                 localedir=path() + '/locales',
 213                 languages=[Config.language]).install()
 214     if not Config.music_path.endswith("/"):
 215         Config.music_path = Config.music_path + "/"
 216
 217 def build_config(args):
 218     stream = open(Config.yml_file, "r")
 219     try:
 220         config = yaml.safe_load(stream)
 221     except Exception as e:
 222         error_print("Error while loading config file: {}".format(e))
 223         config = {}
 224     stream.close()
 225     if 'config' in config:
 226         config = config['config']
 227     else:
 228         config = {}
 229
 230     for config_item in Configs_order:
 231         if Configs[config_item]['type'] != 'boolean' and \
 232                 Configs[config_item]['type'] != 'action':
 233             t = Configs[config_item]['type'] or str
 234             if hasattr(args, config_item):
 235                 setattr(Config, config_item, getattr(args, config_item))
 236             elif config_item in config:
 237                 setattr(Config, config_item, t(config[config_item]))
 238             else:
 239                 setattr(Config, config_item, Configs[config_item]['default'])
 240         elif Configs[config_item]['type'] == 'boolean':
 241             if hasattr(args, 'no_' + config_item) or hasattr(args, config_item):
 242                 setattr(Config, config_item, hasattr(args, config_item))
 243             elif config_item in config:
 244                 setattr(Config, config_item, config[config_item])
 245             else:
 246                 setattr(Config, config_item, Configs[config_item]['default'])
 247         else:
 248             setattr(Config, config_item, hasattr(args, config_item))
 249
 250
 251 def show_version():
 252     if getattr(sys, 'frozen', False):
 253         with open(path() + ".pyinstaller_commit", "r") as f:
 254             return f.read()
 255     else:
 256         return _("option '-V' can only be used in bundled package")
 257
 258 def duration_to_min_sec(duration):
 259     minutes = int(duration / 60)
 260     seconds = int(duration) % 60
 261     if minutes < 100:
 262         return "{:2}:{:0>2}".format(minutes, seconds)
 263     else:
 264         return "{}:{:0>2}".format(minutes, seconds)
 265
 266 def gain(volume, old_volume=None):
 267     if old_volume is None:
 268         return 20 * math.log10(max(volume, 0.1) / 100)
 269     else:
 270         return [
 271                 20 * math.log10(max(volume, 0.1) / max(old_volume, 0.1)),
 272                 max(volume, 0)]
 273
 274 def debug_print(message, with_trace=None):
 275     if with_trace is None:
 276         with_trace = (Logger.getEffectiveLevel() < logging.WARN)
 277     with_trace &= (sys.exc_info()[0] is not None)
 278
 279     Logger.debug('MusicSampler: ' + message, exc_info=with_trace)
 280
 281 def error_print(message, exit=False, with_trace=None):
 282     if with_trace is None:
 283         with_trace = (Logger.getEffectiveLevel() < logging.WARN)
 284     with_trace &= (sys.exc_info()[0] is not None)
 285
 286     # FIXME: handle it correctly when in a thread
 287     if exit:
 288         Logger.critical('MusicSampler: ' + message, exc_info=with_trace)
 289         sys.exit(1)
 290     else:
 291         Logger.error('MusicSampler: ' + message, exc_info=with_trace)
 292
 293 def warn_print(message, with_trace=None):
 294     if with_trace is None:
 295         with_trace = (Logger.getEffectiveLevel() < logging.WARN)
 296     with_trace &= (sys.exc_info()[0] is not None)
 297
 298     Logger.warn('MusicSampler: ' + message, exc_info=with_trace)
 299