music_sampler/mapping.py

   1 from kivy.uix.relativelayout import RelativeLayout
   2 from kivy.properties import NumericProperty, ListProperty, StringProperty
   3 from kivy.core.window import Window
   4 from kivy.clock import Clock
   5
   6 import threading
   7 import yaml
   8 import sys
   9 import copy
  10 from collections import defaultdict
  11
  12 from transitions.extensions import HierarchicalMachine as Machine
  13
  14 from .music_file import MusicFile
  15 from .mixer import Mixer
  16 from .helpers import Config, gain, error_print, warn_print
  17 from .action import Action
  18
  19 class Mapping(RelativeLayout):
  20     STATES = [
  21         'initial',
  22         'configuring',
  23         'configured',
  24         'loading',
  25         'loaded',
  26         'failed'
  27     ]
  28
  29     TRANSITIONS = [
  30         {
  31             'trigger': 'configure',
  32             'source': 'initial',
  33             'dest': 'configuring'
  34         },
  35         {
  36             'trigger': 'fail',
  37             'source': 'configuring',
  38             'dest': 'failed'
  39         },
  40         {
  41             'trigger': 'success',
  42             'source': 'configuring',
  43             'dest': 'configured',
  44             'after': 'load'
  45         },
  46         {
  47             'trigger': 'load',
  48             'source': 'configured',
  49             'dest': 'loading'
  50         },
  51         {
  52             'trigger': 'fail',
  53             'source': 'loading',
  54             'dest': 'failed'
  55         },
  56         {
  57             'trigger': 'success',
  58             'source': 'loading',
  59             'dest': 'loaded'
  60         },
  61         {
  62             'trigger': 'reload',
  63             'source': 'loaded',
  64             'dest': 'configuring'
  65         }
  66     ]
  67
  68     master_volume = NumericProperty(100)
  69     ready_color = ListProperty([1, 165/255, 0, 1])
  70     state = StringProperty("")
  71
  72     def __init__(self, **kwargs):
  73         self.keys = []
  74         self.running = []
  75         self.wait_ids = {}
  76         self.open_files = {}
  77
  78         Machine(model=self, states=self.STATES,
  79                 transitions=self.TRANSITIONS, initial='initial',
  80                 ignore_invalid_triggers=True, queued=True)
  81         super(Mapping, self).__init__(**kwargs)
  82         self.keyboard = Window.request_keyboard(self.on_keyboard_closed, self)
  83         self.keyboard.bind(on_key_down=self.on_keyboard_down)
  84
  85         self.configure()
  86
  87     def on_enter_configuring(self):
  88         if Config.builtin_mixing:
  89             self.mixer = Mixer()
  90         else:
  91             self.mixer = None
  92
  93         try:
  94             self.key_config, self.open_files = self.parse_config()
  95         except Exception as e:
  96             error_print("Error while loading configuration: {}".format(e),
  97                     with_trace=True, exit=True)
  98         else:
  99             self.success()
 100
 101     def on_enter_loading(self):
 102         for key in self.keys:
 103             key.reload()
 104         self.success()
 105
 106     # Kivy events
 107     def add_widget(self, widget, index=0):
 108         if type(widget).__name__ == "Key" and widget not in self.keys:
 109             self.keys.append(widget)
 110         return super(Mapping, self).add_widget(widget, index)
 111
 112     def remove_widget(self, widget, index=0):
 113         if type(widget).__name__ == "Key" and widget in self.keys:
 114             self.keys.remove(widget)
 115         return super(Mapping, self).remove_widget(widget, index)
 116
 117     def on_keyboard_closed(self):
 118         self.keyboard.unbind(on_key_down=self.on_keyboard_down)
 119         self.keyboard = None
 120
 121     def on_keyboard_down(self, keyboard, keycode, text, modifiers):
 122         key = self.find_by_key_code(keycode)
 123         if self.allowed_modifiers(modifiers) and key is not None:
 124             modifiers.sort()
 125             threading.Thread(name="MSKeyAction", target=key.run,
 126                     args=['-'.join(modifiers)]).start()
 127         elif 'ctrl' in modifiers and (keycode[0] == 113 or keycode[0] == '99'):
 128             self.leave_application()
 129             sys.exit()
 130         elif 'ctrl' in modifiers and keycode[0] == 114:
 131             threading.Thread(name="MSReload", target=self.reload).start()
 132         return True
 133
 134     def leave_application(self):
 135         self.keyboard.unbind(on_key_down=self.on_keyboard_down)
 136         self.stop_all_running()
 137         for music in self.open_files.values():
 138             music.stop()
 139         for thread in threading.enumerate():
 140             if thread.getName()[0:2] == "MS":
 141                 thread.join()
 142             elif thread.__class__ == threading.Timer:
 143                 thread.cancel()
 144                 thread.join()
 145
 146     # Helpers
 147     def allowed_modifiers(self, modifiers):
 148         allowed = []
 149         return len([a for a in modifiers if a not in allowed]) == 0
 150
 151     def find_by_key_code(self, key_code):
 152         if "Key_" + str(key_code[0]) in self.ids:
 153             return self.ids["Key_" + str(key_code[0])]
 154         return None
 155
 156     def all_keys_ready(self):
 157         partial = False
 158         for key in self.keys:
 159             if not key.is_loaded_or_failed():
 160                 return "not_ready"
 161             partial = partial or key.is_failed()
 162
 163         if partial:
 164             return "partial"
 165         else:
 166             return "success"
 167
 168     # Callbacks
 169     def key_loaded_callback(self):
 170         result = self.all_keys_ready()
 171         if result == "success":
 172             self.ready_color = [0, 1, 0, 1]
 173         elif result == "partial":
 174             self.ready_color = [1, 0, 0, 1]
 175         else:
 176             self.ready_color = [1, 165/255, 0, 1]
 177
 178     ## Some global actions
 179     def stop_all_running(self, except_key=None, key_start_time=0):
 180         running = self.running
 181         self.running = [r for r in running\
 182                 if r[0] == except_key and r[1] == key_start_time]
 183         for (key, start_time) in running:
 184             if (key, start_time) != (except_key, key_start_time):
 185                 key.interrupt()
 186
 187     # Master volume methods
 188     @property
 189     def master_gain(self):
 190         return gain(self.master_volume)
 191
 192     def set_master_volume(self, value, delta=False, fade=0):
 193         [db_gain, self.master_volume] = gain(
 194                 value + int(delta) * self.master_volume,
 195                 self.master_volume)
 196
 197         for music in self.open_files.values():
 198             music.set_gain_with_effect(db_gain, fade=fade)
 199
 200     # Wait handler methods
 201     def add_wait(self, action_or_wait, wait_id=None):
 202         if wait_id is not None:
 203             self.wait_ids[wait_id] = [action_or_wait]
 204         else:
 205             if None not in self.wait_ids:
 206                 self.wait_ids[None] = []
 207             self.wait_ids[None].append(action_or_wait)
 208
 209     def interrupt_wait(self, wait_id=None):
 210         if wait_id is None:
 211             ids_to_interrupt = list(self.wait_ids.keys())
 212         elif wait_id in self.wait_ids:
 213             ids_to_interrupt = [wait_id]
 214         else:
 215             ids_to_interrupt = []
 216
 217         for _wait_id in ids_to_interrupt:
 218             action_or_waits = self.wait_ids[_wait_id]
 219             del(self.wait_ids[_wait_id])
 220             for action_or_wait in action_or_waits:
 221                 if isinstance(action_or_wait, Action):
 222                     action_or_wait.interrupt()
 223                 else:
 224                     action_or_wait.set()
 225
 226     # Methods to control running keys
 227     def start_running(self, key, start_time):
 228         self.running.append((key, start_time))
 229
 230     def keep_running(self, key, start_time):
 231         return (key, start_time) in self.running
 232
 233     def finished_running(self, key, start_time):
 234         if (key, start_time) in self.running:
 235             self.running.remove((key, start_time))
 236
 237     # YML config parser
 238     def parse_config(self):
 239         def update_alias(prop_hash, aliases, key):
 240             if isinstance(aliases[key], dict):
 241                 for alias in aliases[key]:
 242                     prop_hash.setdefault(alias, aliases[key][alias])
 243             else:
 244                 warn_print("Alias {} is not a hash, ignored".format(key))
 245
 246         def include_aliases(prop_hash, aliases):
 247             if 'include' not in prop_hash:
 248                 return
 249
 250             included = prop_hash['include']
 251             del(prop_hash['include'])
 252             if isinstance(included, str):
 253                 update_alias(prop_hash, aliases, included)
 254             elif isinstance(included, list):
 255                 for included_ in included:
 256                     if isinstance(included_, str):
 257                         update_alias(prop_hash, aliases, included_)
 258                     else:
 259                         warn_print("Unkown alias include type, ignored: "
 260                             "{} in {}".format(included_, included))
 261             else:
 262                 warn_print("Unkown alias include type, ignored: {}"
 263                         .format(included))
 264
 265         def check_key_property(key_property, key):
 266             if 'description' in key_property:
 267                 desc = key_property['description']
 268                 if not isinstance(desc, list):
 269                     warn_print("description in key_property '{}' is not "
 270                             "a list, ignored".format(key))
 271                     del(key_property['description'])
 272             if 'color' in key_property:
 273                 color = key_property['color']
 274                 if not isinstance(color, list)\
 275                         or len(color) != 3\
 276                         or not all(isinstance(item, int) for item in color)\
 277                         or any(item < 0 or item > 255 for item in color):
 278                     warn_print("color in key_property '{}' is not "
 279                             "a list of 3 valid integers, ignored".format(key))
 280                     del(key_property['color'])
 281
 282         def check_key_properties(config):
 283             if 'key_properties' in config:
 284                 if isinstance(config['key_properties'], dict):
 285                     return config['key_properties']
 286                 else:
 287                     warn_print("key_properties config is not a hash, ignored")
 288                     return {}
 289             else:
 290                 return {}
 291
 292         def check_mapped_keys(config):
 293             if 'keys' in config:
 294                 if isinstance(config['keys'], dict):
 295                     return config['keys']
 296                 else:
 297                     warn_print("keys config is not a hash, ignored")
 298                     return {}
 299             else:
 300                 return {}
 301
 302         def check_mapped_key(mapped_keys, key):
 303             if not isinstance(mapped_keys[key], list):
 304                 warn_print("key config '{}' is not an array, ignored"
 305                         .format(key))
 306                 return []
 307             else:
 308                 return mapped_keys[key]
 309
 310         def check_music_property(music_property, filename):
 311             if not isinstance(music_property, dict):
 312                 warn_print("music_property config '{}' is not a hash, ignored"
 313                         .format(filename))
 314                 return {}
 315             if 'name' in music_property:
 316                 music_property['name'] = str(music_property['name'])
 317             if 'gain' in music_property:
 318                 try:
 319                     music_property['gain'] = float(music_property['gain'])
 320                 except ValueError as e:
 321                     del(music_property['gain'])
 322                     warn_print("gain for music_property '{}' is not "
 323                             "a float, ignored".format(filename))
 324             return music_property
 325
 326         stream = open(Config.yml_file, "r")
 327         try:
 328             config = yaml.safe_load(stream)
 329         except Exception as e:
 330             error_print("Error while loading config file: {}".format(e),
 331                     exit=True)
 332         stream.close()
 333
 334         if not isinstance(config, dict):
 335             error_print("Top level config is supposed to be a hash",
 336                     exit=True)
 337
 338         if 'aliases' in config and isinstance(config['aliases'], dict):
 339             aliases = config['aliases']
 340         else:
 341             aliases = defaultdict(dict)
 342             if 'aliases' in config:
 343                 warn_print("aliases config is not a hash, ignored")
 344
 345         music_properties = defaultdict(dict)
 346         if 'music_properties' in config and\
 347                 isinstance(config['music_properties'], dict):
 348             music_properties.update(config['music_properties'])
 349         elif 'music_properties' in config:
 350             warn_print("music_properties config is not a hash, ignored")
 351
 352         seen_files = {}
 353
 354         common_key_properties = {}
 355         if 'common' in config['key_properties'] and\
 356                 isinstance(config['key_properties'], dict):
 357             common_key_properties = config['key_properties']['common']
 358             include_aliases(common_key_properties, aliases)
 359             check_key_property(common_key_properties, 'common')
 360         elif 'common' in config['key_properties']:
 361             warn_print("'common' key in key_properties is not a hash, ignored")
 362
 363         key_properties = defaultdict(lambda: {
 364                 "actions":    [],
 365                 "properties": copy.deepcopy(common_key_properties),
 366                 "files":      []
 367             })
 368
 369         for key in check_key_properties(config):
 370             if key == 'common':
 371                 continue
 372
 373             key_prop = config['key_properties'][key]
 374
 375             if not isinstance(key_prop, dict):
 376                 warn_print("key_property '{}' is not a hash, ignored"
 377                         .format(key))
 378                 continue
 379
 380             include_aliases(key_prop, aliases)
 381             check_key_property(key_prop, key)
 382
 383             key_properties[key]["properties"].update(key_prop)
 384
 385         for mapped_key in check_mapped_keys(config):
 386             for index, action in enumerate(check_mapped_key(
 387                     config['keys'], mapped_key)):
 388                 if not isinstance(action, dict) or\
 389                         not len(action) == 1 or\
 390                         not isinstance(list(action.values())[0] or {}, dict):
 391                     warn_print("action number {} of key '{}' is invalid, "
 392                             "ignored".format(index + 1, mapped_key))
 393                     continue
 394
 395                 action_name = list(action)[0]
 396                 action_args = {}
 397                 if action[action_name] is None:
 398                     action[action_name] = {}
 399
 400                 include_aliases(action[action_name], aliases)
 401
 402                 for argument in action[action_name]:
 403                     if argument == 'file':
 404                         filename = str(action[action_name]['file'])
 405                         if filename not in seen_files:
 406                             music_property = check_music_property(
 407                                     music_properties[filename],
 408                                     filename)
 409
 410                             if filename in self.open_files:
 411                                 self.open_files[filename]\
 412                                         .reload_properties(**music_property)
 413
 414                                 seen_files[filename] =\
 415                                         self.open_files[filename]
 416                             else:
 417                                 seen_files[filename] = MusicFile(
 418                                         filename, self, **music_property)
 419
 420                         if filename not in key_properties[mapped_key]['files']:
 421                             key_properties[mapped_key]['files'] \
 422                                     .append(seen_files[filename])
 423
 424                         action_args['music'] = seen_files[filename]
 425                     else:
 426                         action_args[argument] = action[action_name][argument]
 427
 428                 key_properties[mapped_key]['actions'] \
 429                         .append([action_name, action_args])
 430
 431         return (key_properties, seen_files)
 432
 433