X-Git-Url: https://git.immae.eu/?p=perso%2FImmae%2FProjets%2FPython%2FMusicSampler.git;a=blobdiff_plain;f=helpers%2Fmusic_file.py;h=aef0adce00c4f55f539b67dd07479bdae7327b7e;hp=3053008c0a281adedf65761ab205b5de8bb01d84;hb=9925ce3b588fc449a3e0f5a6506a2d29207928d3;hpb=b37c72a236806f02e5538ba7e607f6add0cc6fb6 diff --git a/helpers/music_file.py b/helpers/music_file.py index 3053008..aef0adc 100644 --- a/helpers/music_file.py +++ b/helpers/music_file.py @@ -10,6 +10,7 @@ import audioop from .lock import Lock from . import Config, gain, debug_print, error_print from .mixer import Mixer +from .music_effect import GainEffect file_lock = Lock("file") @@ -81,7 +82,7 @@ class MusicFile(Machine): self.music_lock = Lock("music__" + filename) self.wait_event = threading.Event() self.db_gain = 0 - self.volume_factor = 1 + self.gain_effects = [] threading.Thread(name="MSMusicLoad", target=self.load).start() @@ -124,23 +125,29 @@ class MusicFile(Machine): return 0 def play(self, fade_in=0, volume=100, loop=0, start_at=0): + # FIXME: create a "reinitialize" method + self.gain_effects = [] self.set_gain(gain(volume) + self.mapping.master_gain, absolute=True) self.volume = volume - self.loop = loop + self.current_loop = 0 + if loop < 0: + self.last_loop = float('inf') + else: + self.last_loop = loop - ms = int(start_at * 1000) - ms_fi = int(fade_in * 1000) with self.music_lock: self.current_audio_segment = self.audio_segment 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 + 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() @@ -164,15 +171,16 @@ 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 != 0: - self.loop -= 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( frame_count - nb_frames) 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() @@ -184,25 +192,6 @@ class MusicFile(Machine): 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()) @@ -213,7 +202,9 @@ class MusicFile(Machine): nb_frames += end_i - start_i self.current_frame += end_i - start_i - data = audioop.mul(data, Config.sample_width, self.volume_factor) + volume_factor = self.volume_factor(self.effects_next_gain(nb_frames)) + + data = audioop.mul(data, Config.sample_width, volume_factor) return [data, nb_frames] @@ -222,12 +213,50 @@ class MusicFile(Machine): 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" + 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 effects_next_gain(self, frame_count): + db_gain = 0 + for gain_effect in self.gain_effects: + [new_gain, last_gain] = gain_effect.get_next_gain( + self.current_frame, + self.current_loop, + frame_count) + if last_gain: + self.set_gain(new_gain) + self.gain_effects.remove(gain_effect) + else: + db_gain += new_gain + 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(): @@ -245,19 +274,30 @@ class MusicFile(Machine): self.stop_playing() self.stopped() + def volume_factor(self, additional_gain): + 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 - self.volume_factor = 10 ** (self.db_gain / 20) - def set_volume(self, value, delta=False): + def set_volume(self, value, delta=False, fade=0): [db_gain, self.volume] = gain( value + int(delta) * self.volume, self.volume) - self.set_gain(db_gain) + 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()