X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=helpers%2Fmusic_file.py;h=b40de1a2f9138a852376bfcc50c058b21af82766;hb=29597680758e4924aa71fc021465189e153f2016;hp=f9c5816c825361da77a6dc609e2291b8c2e1ff8a;hpb=9b9dd12a0253f2e65c5934068d91b544f7679f12;p=perso%2FImmae%2FProjets%2FPython%2FMusicSampler.git diff --git a/helpers/music_file.py b/helpers/music_file.py index f9c5816..b40de1a 100644 --- a/helpers/music_file.py +++ b/helpers/music_file.py @@ -1,114 +1,162 @@ import threading import pydub -import pygame import math import time from transitions.extensions import HierarchicalMachine as Machine +import pyaudio as pa +import sounddevice as sd +import os.path + +from .lock import Lock +file_lock = Lock("file") + +pyaudio = pa.PyAudio() + class MusicFile(Machine): - def __init__(self, filename, lock, channel_id, name = None, gain = 1): + def __init__(self, filename, name = None, gain = 1): states = [ 'initial', 'loading', 'failed', - { 'name': 'loaded', 'children': ['stopped', 'playing', 'paused'] } + { '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': 'play', 'source': 'loaded_stopped', 'dest': 'loaded_playing'}, - #{ 'trigger': 'pause', 'source': 'loaded_playing', 'dest': 'loaded_paused'}, - #{ 'trigger': 'stop', 'source': ['loaded_playing','loaded_paused'], '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'} ] Machine.__init__(self, states=states, transitions=transitions, initial='initial') self.filename = filename - self.channel_id = channel_id + self.stream = None self.name = name or filename - self.raw_data = None + self.audio_segment = None self.gain = gain + self.music_lock = Lock("music__" + filename) self.flag_paused = False - threading.Thread(name = "MSMusicLoad", target = self.load, kwargs = {'lock': lock}).start() - - def on_enter_loading(self, lock=None): - lock.acquire() - try: - print("Loading « {} »".format(self.name)) - volume_factor = 20 * math.log10(self.gain) - audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100).apply_gain(volume_factor) - self.sound_duration = audio_segment.duration_seconds - self.raw_data = audio_segment.raw_data - 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)) - finally: - lock.release() + threading.Thread(name = "MSMusicLoad", target = self.load).start() + + def on_enter_loading(self): + with file_lock: + try: + print("Loading « {} »".format(self.name)) + volume_factor = 20 * math.log10(self.gain) + self.audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100).apply_gain(volume_factor) + 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_playing(self): - return self.channel().get_busy() + def is_not_stopped(self): + return self.check_is_loaded() and not self.is_loaded_stopped() def is_paused(self): - return self.flag_paused + return self.is_loaded_paused() @property def sound_position(self): - if self.is_playing() and not self.is_paused(): - return min(time.time() - self.started_at, self.sound_duration) - elif self.is_playing() and self.is_paused(): - return min(self.paused_at - self.started_at, self.sound_duration) + 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, start_at = 0): - self.set_volume(volume) - - if start_at > 0: - raw_data_length = len(self.raw_data) - start_offset = int((raw_data_length / self.sound_duration) * start_at) - start_offset = start_offset - (start_offset % 2) - sound = pygame.mixer.Sound(self.raw_data[start_offset:]) - else: - sound = pygame.mixer.Sound(self.raw_data) - - self.started_at = time.time() - self.channel().play(sound, fade_ms = int(fade_in * 1000)) - self.flag_paused = False - - def pause(self): - self.paused_at = time.time() - self.channel().pause() - self.flag_paused = True - - def unpause(self): - self.started_at += (time.time() - self.paused_at) - self.channel().unpause() - self.flag_paused = False + self.db_gain = self.volume_to_gain(volume) + ms = int(start_at * 1000) + ms_fi = max(1, int(fade_in * 1000)) + with self.music_lock: + self.current_audio_segment = (self.audio_segment + self.db_gain).fade(from_gain=-120, duration=ms_fi, start=ms) + self.before_loaded_playing(initial_frame = int(start_at * self.audio_segment.frame_rate)) + self.start_playing() + + def before_loaded_playing(self, initial_frame = 0): + self.current_frame = initial_frame + with self.music_lock: + segment = self.current_audio_segment + + self.stream = sd.RawOutputStream(samplerate=segment.frame_rate, + channels=segment.channels, + dtype='int' + str(8*segment.sample_width), # FIXME: ? + latency=1., + callback=self.play_callback, + finished_callback=self.finished_callback + ) + + def on_enter_loaded_playing(self): + self.stream.start() + + def on_enter_loaded_paused(self): + self.stream.stop() + + def finished_callback(self): + if self.is_loaded_playing(): + self.stop_playing() + if self.is_loaded_stopping(): + self.stopped() + + def play_callback(self, out_data, frame_count, time_info, status_flags): + with self.music_lock: + audio_segment = self.current_audio_segment.get_sample_slice_data( + start_sample=self.current_frame, + end_sample=self.current_frame + frame_count + ) + self.current_frame += frame_count + if len(audio_segment) == 0: + raise sd.CallbackStop + + out_data[:] = audio_segment.ljust(len(out_data), b'\0') def stop(self, fade_out = 0): - if fade_out > 0: - self.channel().fadeout(int(fade_out * 1000)) + if self.is_loaded_playing(): + ms = int(self.sound_position * 1000) + ms_fo = max(1, int(fade_out * 1000)) + + with self.music_lock: + self.current_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo) + self.stop_playing() else: - self.channel().stop() + self.stop_playing() + self.stopped() def set_volume(self, value): - if value < 0: - value = 0 - if value > 100: - value = 100 - self.channel().set_volume(value / 100) + if self.is_loaded_stopped(): + return + + db_gain = self.volume_to_gain(value) + new_audio_segment = self.current_audio_segment + (db_gain - self.db_gain) + self.db_gain = db_gain + with self.music_lock: + self.current_audio_segment = new_audio_segment + + def volume_to_gain(self, volume): + return 20 * math.log10(max(volume, 0.0001) / 100) def wait_end(self): + # FIXME: todo pass - def channel(self): - return pygame.mixer.Channel(self.channel_id) +# 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()) + + 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