import threading
import pydub
-import pygame
+import time
+from transitions.extensions import HierarchicalMachine as Machine
-class MusicFile:
- def __init__(self, filename, lock):
+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(Machine):
+ def __init__(self, filename, mapping, name=None, gain=1):
+ states = [
+ 'initial',
+ 'loading',
+ 'failed',
+ {
+ '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': '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',
+ 'after': 'trigger_stopped_events'
+ }
+ ]
+
+ Machine.__init__(self, states=states,
+ transitions=transitions, initial='initial')
+
+ self.volume = 100
+ self.mapping = mapping
self.filename = filename
- self.channel = None
- self.raw_data = None
- self.sound = None
-
- self.loaded = False
- threading.Thread(target = self.load_sound, args = [lock]).start()
-
- def load_sound(self, lock):
- lock.acquire()
- print("Loading {}".format(self.filename))
- self.raw_data = pydub.AudioSegment.from_file(self.filename).raw_data
- self.sound = pygame.mixer.Sound(self.raw_data)
- print("Loaded {}".format(self.filename))
- self.loaded = True
- lock.release()
-
- def is_playing(self):
- return self.channel is not None and self.channel.get_busy()
-
- def play(self, fade_in = 0, volume = 100, start_at = 0):
- self.set_volume(volume)
-
- if start_at > 0:
- song_duration = self.sound.get_length()
- raw_data_length = len(self.raw_data)
- start_offset = int((raw_data_length / song_duration) * start_at)
- start_offset = start_offset - (start_offset % 2)
- self.sound = pygame.mixer.Sound(self.raw_data[start_offset:])
+ self.name = name or filename
+ self.audio_segment = None
+ self.audio_segment_frame_width = 0
+ self.initial_volume_factor = gain
+ self.music_lock = Lock("music__" + filename)
+ self.wait_event = threading.Event()
+ self.db_gain = 0
+ self.gain_effects = []
+
+ threading.Thread(name="MSMusicLoad", target=self.load).start()
+
+ def on_enter_loading(self):
+ with file_lock:
+ try:
+ 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(self.filename) \
+ .set_frame_rate(Config.frame_rate) \
+ .set_channels(Config.channels) \
+ .set_sample_width(Config.sample_width) \
+ .apply_gain(initial_db_gain)
+ self.audio_segment_frame_width = self.audio_segment.frame_width
+ 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 check_is_loaded(self):
+ return self.state.startswith('loaded_')
+
+ def is_not_stopped(self):
+ return self.check_is_loaded() and not self.is_loaded_stopped()
+
+ def is_paused(self):
+ return self.is_loaded_paused()
+
+ @property
+ def sound_position(self):
+ 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, 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.current_loop = 0
+ 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)
+ 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()
+
+ def on_enter_loaded_playing(self):
+ self.mixer.add_file(self)
+
+ def finished_callback(self):
+ if self.is_loaded_playing():
+ self.stop_playing()
+ if self.is_loaded_stopping():
+ self.stopped()
+
+ def trigger_stopped_events(self):
+ self.mixer.remove_file(self)
+ self.wait_event.set()
+
+ 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')
+
+ 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 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.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():
+ 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:
+ self.wait_end()
else:
- self.sound = pygame.mixer.Sound(self.raw_data)
+ self.stop_playing()
+ self.stopped()
- self.channel = self.sound.play(fade_ms = fade_in * 1000)
+ def volume_factor(self, additional_gain):
+ return 10 ** ( (self.db_gain + additional_gain) / 20)
- def pause(self):
- if self.channel is not None:
- self.channel.pause()
+ def set_gain(self, db_gain, absolute=False):
+ if absolute:
+ self.db_gain = db_gain
+ else:
+ self.db_gain += db_gain
- def stop(self, fade_out = 0):
- self.channel = None
- if fade_out > 0:
- self.sound.fadeout(fade_out * 1000)
+ def set_volume(self, value, delta=False, fade=0):
+ [db_gain, self.volume] = gain(
+ value + int(delta) * self.volume,
+ self.volume)
+
+ 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.sound.stop()
-
- def set_volume(self, value):
- if value < 0:
- value = 0
- if value > 100:
- value = 100
- self.sound.set_volume(value / 100)
+ self.set_gain(db_gain)
+
+ def wait_end(self):
+ self.wait_event.clear()
+ self.wait_event.wait()
projects / perso / Immae / Projets / Python / MusicSampler.git / blobdiff