X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=helpers%2Fmusic_file.py;h=efa8628b83c4b078abd6d87b00f30edace769310;hb=d6290f14246b69e10a73e2798dd3905e866b3e88;hp=39b0566ccd5c68ae925af87d93c45cb630f2dc78;hpb=be27763f8be0f647cbe17ecee8c782901ce2cede;p=perso%2FImmae%2FProjets%2FPython%2FMusicSampler.git diff --git a/helpers/music_file.py b/helpers/music_file.py index 39b0566..efa8628 100644 --- a/helpers/music_file.py +++ b/helpers/music_file.py @@ -1,35 +1,224 @@ import threading import pydub -import pygame +import time +from transitions.extensions import HierarchicalMachine as Machine -class MusicFile: - def __init__(self, filename, lock): +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.channel = None - self.raw_data = None - self.sound = None + 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)) + + # FIXME: stop fade_out puis seek -5 -> on abandonne le fade ? (cf + # commentaire dans fonction seek + 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 - self.loaded = False - threading.Thread(target = self.load_sound, args = [lock]).start() + def set_volume(self, value, delta = False): + [db_gain, self.volume] = gain(value + int(delta) * self.volume, self.volume) - def load_sound(self, lock): - lock.acquire() - print("Loading {}".format(self.filename)) - self.raw_data = pydub.AudioSegment.from_file(self.filename).raw_data - self.sound = pygame.mixer.Sound(self.raw_data) - print("Loaded {}".format(self.filename)) - self.loaded = True - lock.release() + self.set_gain(db_gain) - def play(self): - self.channel = self.sound.play() + def wait_end(self): + self.wait_event.clear() + self.wait_event.wait() - def pause(self): - if self.channel is not None: - self.channel.pause() +# Add some more functions to AudioSegments +def get_sample_slice_data(self, start_sample=0, end_sample=float('inf')): + max_val = int(self.frame_count()) - def stop(self): - self.channel = None - self.sound.stop() + start_i = max(start_sample, 0) * self.frame_width + end_i = min(end_sample, max_val) * self.frame_width + return self._data[start_i:end_i] +pydub.AudioSegment.get_sample_slice_data = get_sample_slice_data