X-Git-Url: https://git.immae.eu/?p=perso%2FImmae%2FProjets%2FPython%2FMusicSampler.git;a=blobdiff_plain;f=helpers%2Fmusic_file.py;h=ba8614204e030423c2aa71baca8b3f084143e759;hp=a37a708cb5365ae519a76186ce5768a60280be08;hb=ab47d2a1269c20d70f42942c4295c056544491f4;hpb=1e44fe7e6c1464b49582a163615e8cb3ed279d3e diff --git a/helpers/music_file.py b/helpers/music_file.py index a37a708..ba86142 100644 --- a/helpers/music_file.py +++ b/helpers/music_file.py @@ -14,78 +14,110 @@ from .music_effect import GainEffect file_lock = Lock("file") -class MusicFile(Machine): +class MusicFile: + STATES = [ + 'initial', + 'loading', + 'failed', + { + 'name': 'loaded', + 'children': [ + 'playing', + 'paused', + 'stopping' + ] + } + ] + TRANSITIONS = [ + { + 'trigger': 'load', + 'source': 'initial', + 'dest': 'loading', + 'after': 'poll_loaded' + }, + { + 'trigger': 'fail', + 'source': 'loading', + 'dest': 'failed' + }, + { + 'trigger': 'success', + 'source': 'loading', + 'dest': 'loaded' + }, + { + 'trigger': 'start_playing', + 'source': 'loaded', + 'dest': 'loaded_playing', + # if a child has no transitions, then it is bubbled to the parent, + # and we don't want that. Not useful in that machine precisely. + 'conditions': ['is_loaded'] + }, + { + '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': '*', + 'dest': 'loaded', + 'before': 'trigger_stopped_events', + 'conditions': ['is_in_use'] + } + ] + 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') + Machine(model=self, states=self.STATES, + transitions=self.TRANSITIONS, initial='initial', + ignore_invalid_triggers=True) - self.volume = 100 + self.loaded_callbacks = [] self.mapping = mapping self.filename = filename self.name = name or filename self.audio_segment = None - self.audio_segment_frame_width = 0 self.initial_volume_factor = gain self.music_lock = Lock("music__" + filename) - self.wait_event = threading.Event() - self.db_gain = 0 - self.gain_effects = [] threading.Thread(name="MSMusicLoad", target=self.load).start() + def reload_properties(self, name=None, gain=1): + self.name = name or self.filename + if gain != self.initial_volume_factor: + self.initial_volume_factor = gain + self.reload_music_file() + + def reload_music_file(self): + with file_lock: + try: + debug_print("Reloading « {} »".format(self.name)) + initial_db_gain = gain(self.initial_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(initial_db_gain) + except Exception as e: + error_print("failed to reload « {} »: {}"\ + .format(self.name, e)) + self.loading_error = e + self.to_failed() + else: + debug_print("Reloaded « {} »".format(self.name)) + + # Machine related events def on_enter_loading(self): with file_lock: try: @@ -98,7 +130,6 @@ class MusicFile(Machine): .set_channels(Config.channels) \ .set_sample_width(Config.sample_width) \ .apply_gain(initial_db_gain) - self.audio_segment_frame_width = self.audio_segment.frame_width self.sound_duration = self.audio_segment.duration_seconds except Exception as e: error_print("failed to load « {} »: {}".format(self.name, e)) @@ -108,18 +139,37 @@ class MusicFile(Machine): self.success() debug_print("Loaded « {} »".format(self.name)) - def check_is_loaded(self): - return self.state.startswith('loaded_') + def on_enter_loaded(self): + self.cleanup() - def is_not_stopped(self): - return self.check_is_loaded() and not self.is_loaded_stopped() + def cleanup(self): + self.gain_effects = [] + self.set_gain(0, absolute=True) + self.current_audio_segment = None + self.volume = 100 + self.wait_event = threading.Event() + self.current_loop = 0 - def is_paused(self): - return self.is_loaded_paused() + def on_enter_loaded_playing(self): + self.mixer.add_file(self) + + # Machine related states + def is_in_use(self): + return self.is_loaded(allow_substates=True) and not self.is_loaded() + def is_in_use_not_stopping(self): + return self.is_loaded_playing() or self.is_loaded_paused() + + # Machine related triggers + def trigger_stopped_events(self): + self.mixer.remove_file(self) + self.wait_event.set() + self.cleanup() + + # Actions and properties called externally @property def sound_position(self): - if self.is_not_stopped(): + if self.is_in_use(): return self.current_frame / self.current_audio_segment.frame_rate else: return 0 @@ -127,37 +177,113 @@ class MusicFile(Machine): def play(self, fade_in=0, volume=100, loop=0, start_at=0): self.set_gain(gain(volume) + self.mapping.master_gain, absolute=True) self.volume = volume - self.current_loop = 0 - self.loop_left = loop + if loop < 0: + self.last_loop = float('inf') + else: + self.last_loop = loop with self.music_lock: self.current_audio_segment = self.audio_segment self.current_frame = int(start_at * self.audio_segment.frame_rate) - if fade_in > 0: - db_gain = gain(self.volume, 0)[0] - self.set_gain(-db_gain) - self.gain_effects.append(GainEffect( - "fade", - self.current_audio_segment, - self.current_loop, - self.sound_position, - self.sound_position + fade_in, - gain=db_gain)) self.start_playing() - def on_enter_loaded_playing(self): - self.mixer.add_file(self) + if fade_in > 0: + db_gain = gain(self.volume, 0)[0] + self.set_gain(-db_gain) + self.add_fade_effect(db_gain, fade_in) - def finished_callback(self): + def seek(self, value=0, delta=False): + if not self.is_in_use_not_stopping(): + return + + with self.music_lock: + self.abandon_all_effects() + if delta: + frame_count = int(self.audio_segment.frame_count()) + frame_diff = int(value * self.audio_segment.frame_rate) + self.current_frame += frame_diff + while self.current_frame < 0: + self.current_loop -= 1 + self.current_frame += frame_count + while self.current_frame > frame_count: + self.current_loop += 1 + self.current_frame -= frame_count + if self.current_loop < 0: + self.current_loop = 0 + self.current_frame = 0 + if self.current_loop > self.last_loop: + self.current_loop = self.last_loop + self.current_frame = frame_count + else: + self.current_frame = max( + 0, + int(value * self.audio_segment.frame_rate)) + + def stop(self, fade_out=0, wait=False, set_wait_id=None): 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 self.is_loaded_stopping(): + if wait: + if set_wait_id is not None: + self.mapping.add_wait_id(set_wait_id, self.wait_event) + self.wait_end() + else: self.stopped() - def trigger_stopped_events(self): - self.mixer.remove_file(self) - self.wait_event.set() + def abandon_all_effects(self): + db_gain = 0 + for gain_effect in self.gain_effects: + db_gain += gain_effect.get_last_gain() + + self.gain_effects = [] + self.set_gain(db_gain) + + def set_volume(self, value, delta=False, fade=0): + [db_gain, self.volume] = gain( + value + int(delta) * self.volume, + self.volume) + + self.set_gain_with_effect(db_gain, fade=fade) + + def set_gain_with_effect(self, db_gain, fade=0): + if not self.is_in_use(): + return + + if fade > 0: + self.add_fade_effect(db_gain, fade) + else: + self.set_gain(db_gain) + + def wait_end(self): + self.wait_event.clear() + self.wait_event.wait() + + # Let other subscribe for an event when they are ready + def subscribe_loaded(self, callback): + # FIXME: should lock to be sure we have no race, but it makes the + # initialization screen not showing until everything is loaded + if self.is_loaded(allow_substates=True): + callback(True) + elif self.is_failed(): + callback(False) + else: + self.loaded_callbacks.append(callback) + + def poll_loaded(self): + for callback in self.loaded_callbacks: + callback(self.is_loaded()) + self.loaded_callbacks = [] + + # Callbacks + def finished_callback(self): + self.stopped() def play_callback(self, out_data_length, frame_count): if self.is_loaded_paused(): @@ -166,8 +292,8 @@ class MusicFile(Machine): 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_left != 0: - self.loop_left -= 1 + if self.is_loaded_playing() and\ + self.current_loop < self.last_loop: self.current_loop += 1 self.current_frame = 0 [new_data, new_nb_frames] = self.get_next_sample( @@ -175,15 +301,22 @@ class MusicFile(Machine): data += new_data nb_frames += new_nb_frames elif nb_frames == 0: - # FIXME: too slow + # FIXME: too slow when mixing multiple streams threading.Thread( name="MSFinishedCallback", target=self.finished_callback).start() return data.ljust(out_data_length, b'\0') + # Helpers + def set_gain(self, db_gain, absolute=False): + if absolute: + self.db_gain = db_gain + else: + self.db_gain += db_gain + def get_next_sample(self, frame_count): - fw = self.audio_segment_frame_width + fw = self.audio_segment.frame_width data = b"" nb_frames = 0 @@ -203,17 +336,17 @@ class MusicFile(Machine): 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()): + def add_fade_effect(self, db_gain, fade_duration): + if not self.is_in_use(): return - with self.music_lock: - self.abandon_all_effects() - 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" + + self.gain_effects.append(GainEffect( + "fade", + self.current_audio_segment, + self.current_loop, + self.sound_position, + self.sound_position + fade_duration, + gain=db_gain)) def effects_next_gain(self, frame_count): db_gain = 0 @@ -230,56 +363,6 @@ class MusicFile(Machine): return db_gain - def abandon_all_effects(self): - db_gain = 0 - for gain_effect in self.gain_effects: - db_gain += gain_effect.get_last_gain() - - self.gain_effects = [] - self.set_gain(db_gain) - - 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 volume_factor(self, additional_gain): + def volume_factor(self, additional_gain=0): return 10 ** ( (self.db_gain + additional_gain) / 20) - def set_gain(self, db_gain, absolute=False): - if absolute: - self.db_gain = db_gain - else: - self.db_gain += db_gain - - def set_volume(self, value, delta=False, fade=0): - [db_gain, self.volume] = gain( - value + int(delta) * self.volume, - self.volume) - - if fade > 0: - self.gain_effects.append(GainEffect( - "fade", - self.current_audio_segment, - self.current_loop, - self.sound_position, - self.sound_position + fade, - gain=db_gain)) - else: - self.set_gain(db_gain) - - def wait_end(self): - self.wait_event.clear() - self.wait_event.wait() -