import threading import pydub import time from transitions.extensions import HierarchicalMachine as Machine import os.path from .lock import Lock from . import Config, gain from .mixer import Mixer file_lock = Lock("file") class MusicFile(Machine): def __init__(self, filename, mapping, name = None, gain = 1): states = [ 'initial', 'loading', 'failed', { 'name': 'loaded', 'children': ['stopped', 'playing', 'paused', 'stopping'] } ] transitions = [ { 'trigger': 'load', 'source': 'initial', 'dest': 'loading'}, { 'trigger': 'fail', 'source': 'loading', 'dest': 'failed'}, { 'trigger': 'success', 'source': 'loading', 'dest': 'loaded_stopped'}, { 'trigger': 'start_playing', 'source': 'loaded_stopped', 'dest': 'loaded_playing'}, { 'trigger': 'pause', 'source': 'loaded_playing', 'dest': 'loaded_paused'}, { 'trigger': 'unpause', 'source': 'loaded_paused', 'dest': 'loaded_playing'}, { 'trigger': 'stop_playing', 'source': ['loaded_playing','loaded_paused'], 'dest': 'loaded_stopping'}, { 'trigger': 'stopped', 'source': 'loaded_stopping', 'dest': 'loaded_stopped', 'after': 'trigger_stopped_events'} ] Machine.__init__(self, states=states, transitions=transitions, initial='initial') # FIXME: catch error here self.mixer = mapping.mixer or Mixer() self.volume = 100 self.mapping = mapping self.filename = filename self.name = name or filename self.audio_segment = None self.audio_segment_frame_width = 0 self.volume_factor = gain self.music_lock = Lock("music__" + filename) self.wait_event = threading.Event() threading.Thread(name = "MSMusicLoad", target = self.load).start() def on_enter_loading(self): with file_lock: try: print("Loading « {} »".format(self.name)) db_gain = gain(self.volume_factor * 100) self.audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(Config.frame_rate).set_channels(Config.channels).set_sample_width(Config.sample_width).apply_gain(db_gain) self.audio_segment_frame_width = self.audio_segment.frame_width self.sound_duration = self.audio_segment.duration_seconds except Exception as e: print("failed to load « {} »: {}".format(self.name, e)) self.loading_error = e self.fail() else: self.success() print("Loaded « {} »".format(self.name)) def check_is_loaded(self): return self.state.startswith('loaded_') def is_not_stopped(self): return self.check_is_loaded() and not self.is_loaded_stopped() def is_paused(self): return self.is_loaded_paused() @property def sound_position(self): if self.is_not_stopped(): return self.current_frame / self.current_audio_segment.frame_rate else: return 0 def play(self, fade_in = 0, volume = 100, loop = 0, start_at = 0): db_gain = gain(volume) + self.mapping.master_gain self.volume = volume self.loop = loop ms = int(start_at * 1000) ms_fi = int(fade_in * 1000) with self.music_lock: self.current_audio_segment = (self.audio_segment + db_gain) self.current_frame = int(start_at * self.audio_segment.frame_rate) if ms_fi > 0: # FIXME: apply it to repeated when looping? self.a_s_with_effect = self.current_audio_segment[ms:ms+ms_fi].fade_in(ms_fi) self.current_frame_with_effect = 0 else: self.a_s_with_effect = None self.start_playing() def on_enter_loaded_playing(self): self.mixer.add_file(self) def finished_callback(self): if self.is_loaded_playing(): self.stop_playing() if self.is_loaded_stopping(): self.stopped() def trigger_stopped_events(self): self.mixer.remove_file(self) self.wait_event.set() def play_callback(self, out_data_length, frame_count): if self.is_loaded_paused(): return b'\0' * out_data_length with self.music_lock: [data, nb_frames] = self.get_next_sample(frame_count) if nb_frames < frame_count: if self.is_loaded_playing() and self.loop != 0: self.loop -= 1 self.current_frame = 0 [new_data, new_nb_frames] = self.get_next_sample(frame_count - nb_frames) data += new_data nb_frames += new_nb_frames elif nb_frames == 0: # FIXME: too slow threading.Thread(name = "MSFinishedCallback", target=self.finished_callback).start() return data.ljust(out_data_length, b'\0') def get_next_sample(self, frame_count): fw = self.audio_segment_frame_width data = b"" nb_frames = 0 if self.a_s_with_effect is not None: segment = self.a_s_with_effect max_val = int(segment.frame_count()) start_i = max(self.current_frame_with_effect, 0) end_i = min(self.current_frame_with_effect + frame_count, max_val) data += segment._data[(start_i * fw):(end_i * fw)] frame_count = max(0, self.current_frame_with_effect + frame_count - max_val) self.current_frame_with_effect += end_i - start_i self.current_frame += end_i - start_i nb_frames += end_i - start_i if frame_count > 0: self.a_s_with_effect = None segment = self.current_audio_segment max_val = int(segment.frame_count()) start_i = max(self.current_frame, 0) end_i = min(self.current_frame + frame_count, max_val) data += segment._data[(start_i * fw):(end_i * fw)] nb_frames += end_i - start_i self.current_frame += end_i - start_i return [data, nb_frames] def seek(self, value = 0, delta = False): # We don't want to do that while stopping if not (self.is_loaded_playing() or self.is_loaded_paused()): return with self.music_lock: self.a_s_with_effect = None self.current_frame = max(0, int(delta) * self.current_frame + int(value * self.audio_segment.frame_rate)) # FIXME: si on fait un seek + delta, adapter le "loop" def stop(self, fade_out = 0, wait = False): if self.is_loaded_playing(): ms = int(self.sound_position * 1000) ms_fo = max(1, int(fade_out * 1000)) new_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo) with self.music_lock: self.current_audio_segment = new_audio_segment self.stop_playing() if wait: self.wait_end() else: self.stop_playing() self.stopped() def set_gain(self, db_gain): if not self.is_not_stopped(): return new_audio_segment = self.current_audio_segment + db_gain new_a_s_with_effect = None if self.a_s_with_effect is not None: new_a_s_with_effect = self.a_s_with_effect + db_gain with self.music_lock: self.current_audio_segment = new_audio_segment self.a_s_with_effect = new_a_s_with_effect def set_volume(self, value, delta = False): [db_gain, self.volume] = gain(value + int(delta) * self.volume, self.volume) self.set_gain(db_gain) def wait_end(self): self.wait_event.clear() self.wait_event.wait()