+++ /dev/null
-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)
-
projects / perso / Immae / Projets / Python / MusicSampler.git / blobdiff