From 63ba5a8dc2aa4ec3e6f203b0ba4db249ecf0b00e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Isma=C3=ABl=20Bouya?= Date: Wed, 27 Jul 2016 21:33:09 +0200 Subject: Rename helpers to music_sampler --- helpers/music_file.py | 378 -------------------------------------------------- 1 file changed, 378 deletions(-) delete mode 100644 helpers/music_file.py (limited to 'helpers/music_file.py') diff --git a/helpers/music_file.py b/helpers/music_file.py deleted file mode 100644 index 2d3ba72..0000000 --- a/helpers/music_file.py +++ /dev/null @@ -1,378 +0,0 @@ -import threading -import pydub -import time -from transitions.extensions import HierarchicalMachine as Machine - -import os.path - -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") - -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): - Machine(model=self, states=self.STATES, - transitions=self.TRANSITIONS, initial='initial', - ignore_invalid_triggers=True) - - self.loaded_callbacks = [] - self.mapping = mapping - self.filename = filename - self.name = name or filename - self.audio_segment = None - self.initial_volume_factor = gain - self.music_lock = Lock("music__" + filename) - - 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: - if self.filename.startswith("/"): - filename = self.filename - else: - filename = Config.music_path + self.filename - - debug_print("Reloading « {} »".format(self.name)) - initial_db_gain = gain(self.initial_volume_factor * 100) - self.audio_segment = pydub.AudioSegment \ - .from_file(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: - if self.filename.startswith("/"): - filename = self.filename - else: - filename = Config.music_path + self.filename - - debug_print("Loading « {} »".format(self.name)) - self.mixer = self.mapping.mixer or Mixer() - initial_db_gain = gain(self.initial_volume_factor * 100) - self.audio_segment = pydub.AudioSegment \ - .from_file(filename) \ - .set_frame_rate(Config.frame_rate) \ - .set_channels(Config.channels) \ - .set_sample_width(Config.sample_width) \ - .apply_gain(initial_db_gain) - self.sound_duration = self.audio_segment.duration_seconds - except Exception as e: - error_print("failed to load « {} »: {}".format(self.name, e)) - self.loading_error = e - self.fail() - else: - self.success() - debug_print("Loaded « {} »".format(self.name)) - - def on_enter_loaded(self): - self.cleanup() - - 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 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_in_use(): - 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): - self.set_gain(gain(volume) + self.mapping.master_gain, absolute=True) - self.volume = volume - 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) - - self.start_playing() - - 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 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 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 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(): - 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.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 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 - - data = b"" - nb_frames = 0 - - 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 - - volume_factor = self.volume_factor(self.effects_next_gain(nb_frames)) - - data = audioop.mul(data, Config.sample_width, volume_factor) - - return [data, nb_frames] - - def add_fade_effect(self, db_gain, fade_duration): - if not self.is_in_use(): - return - - 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 - 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 volume_factor(self, additional_gain=0): - return 10 ** ( (self.db_gain + additional_gain) / 20) - -- cgit v1.2.3