helpers/music_file.py

   1 import threading
   2 import pydub
   3 import pygame
   4
   5 class MusicFile:
   6     def __init__(self, filename, lock, channel_id, name = None):
   7         self.filename = filename
   8         self.channel_id = channel_id
   9         self.name = name or filename
  10         self.raw_data = None
  11
  12         self.loaded = False
  13         self.flag_paused = False
  14         threading.Thread(name = "MSMusicLoad", target = self.load_sound, args = [lock]).start()
  15
  16     def load_sound(self, lock):
  17         lock.acquire()
  18         print("Loading « {} »".format(self.name))
  19         audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100)
  20         self.sound_duration = audio_segment.duration_seconds
  21         self.raw_data = audio_segment.raw_data
  22         print("Loaded « {} »".format(self.name))
  23         self.loaded = True
  24         lock.release()
  25
  26     def is_playing(self):
  27         return self.channel().get_busy()
  28
  29     def is_paused(self):
  30         return self.flag_paused
  31
  32     def play(self, fade_in = 0, volume = 100, start_at = 0):
  33         self.channel().set_endevent()
  34         self.channel().set_endevent(pygame.USEREVENT)
  35         self.set_volume(volume)
  36
  37         if start_at > 0:
  38             raw_data_length = len(self.raw_data)
  39             start_offset = int((raw_data_length / self.sound_duration) * start_at)
  40             start_offset = start_offset - (start_offset % 2)
  41             sound = pygame.mixer.Sound(self.raw_data[start_offset:])
  42         else:
  43             sound = pygame.mixer.Sound(self.raw_data)
  44
  45         self.channel().play(sound, fade_ms = fade_in * 1000)
  46         self.flag_paused = False
  47
  48     def pause(self):
  49         self.channel().pause()
  50         self.flag_paused = True
  51
  52     def unpause(self):
  53         self.channel().unpause()
  54         self.flag_paused = False
  55
  56     def stop(self, fade_out = 0):
  57         if fade_out > 0:
  58             self.channel().fadeout(fade_out * 1000)
  59         else:
  60             self.channel().stop()
  61
  62     def set_volume(self, value):
  63         if value < 0:
  64             value = 0
  65         if value > 100:
  66             value = 100
  67         self.channel().set_volume(value / 100)
  68
  69     def wait_end(self):
  70         pass
  71
  72     def channel(self):
  73         return pygame.mixer.Channel(self.channel_id)