X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=helpers%2Fmusic_file.py;h=8b1c4804f56fdefac13698f0502d77cba5b077c0;hb=ccc8b4f206e254f70def3fe42c437bc58d474167;hp=e6a340da53e56c97dda679a14064f056e01fd670;hpb=0deb82a57ae3abefd44509dc88c546f6e5a94d1b;p=perso%2FImmae%2FProjets%2FPython%2FMusicSampler.git diff --git a/helpers/music_file.py b/helpers/music_file.py index e6a340d..8b1c480 100644 --- a/helpers/music_file.py +++ b/helpers/music_file.py @@ -1,6 +1,5 @@ import threading import pydub -import math import time from transitions.extensions import HierarchicalMachine as Machine @@ -9,12 +8,14 @@ import sounddevice as sd import os.path from .lock import Lock +from . import gain + file_lock = Lock("file") pyaudio = pa.PyAudio() class MusicFile(Machine): - def __init__(self, filename, name = None, gain = 1): + def __init__(self, filename, mapping, name = None, gain = 1): states = [ 'initial', 'loading', @@ -34,11 +35,14 @@ class MusicFile(Machine): Machine.__init__(self, states=states, transitions=transitions, initial='initial') + self.volume = 100 + self.mapping = mapping self.filename = filename self.stream = None self.name = name or filename self.audio_segment = None - self.gain = gain + self.audio_segment_frame_width = 0 + self.volume_factor = gain self.music_lock = Lock("music__" + filename) self.wait_event = threading.Event() @@ -48,8 +52,9 @@ class MusicFile(Machine): 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) + db_gain = gain(self.volume_factor * 100) + self.audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100).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)) @@ -75,17 +80,27 @@ class MusicFile(Machine): else: return 0 - def play(self, fade_in = 0, volume = 100, start_at = 0): - self.db_gain = self.volume_to_gain(volume) + 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 = max(1, int(fade_in * 1000)) + ms_fi = 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.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.before_loaded_playing() self.start_playing() - def before_loaded_playing(self, initial_frame = 0): - self.current_frame = initial_frame + def before_loaded_playing(self): with self.music_lock: segment = self.current_audio_segment @@ -114,40 +129,96 @@ class MusicFile(Machine): 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 + [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: + raise sd.CallbackStop + + out_data[:] = data.ljust(len(out_data), 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) - out_data[:] = audio_segment.ljust(len(out_data), b'\0') + self.current_frame_with_effect += end_i - start_i + self.current_frame += end_i - start_i + nb_frames += end_i - start_i - def stop(self, fade_out = 0): + 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 with self.music_lock: self.current_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo) self.stop_playing() + if wait: + self.wait_end() else: self.stop_playing() self.stopped() - def set_volume(self, value): - if self.is_loaded_stopped(): + def set_gain(self, db_gain): + if not self.is_not_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 + 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) - def volume_to_gain(self, volume): - return 20 * math.log10(max(volume, 0.0001) / 100) + self.set_gain(db_gain) def wait_end(self): self.wait_event.clear()