import time
from transitions.extensions import HierarchicalMachine as Machine
-import pyaudio as pa
-import sounddevice as sd
import os.path
from .lock import Lock
-from . import gain
+from . import Config, gain
+from .mixer import Mixer
file_lock = Lock("file")
-pyaudio = pa.PyAudio()
-
class MusicFile(Machine):
def __init__(self, filename, mapping, name = None, gain = 1):
states = [
{ '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'}
+ { 'trigger': 'stopped', 'source': 'loaded_stopping', 'dest': 'loaded_stopped', 'after': 'trigger_stopped_events'}
]
Machine.__init__(self, states=states, transitions=transitions, initial='initial')
+ # FIXME: catch error here
+ self.mixer = mapping.mixer or Mixer()
self.volume = 100
self.mapping = mapping
self.filename = filename
- self.stream = None
self.name = name or filename
self.audio_segment = None
+ self.audio_segment_frame_width = 0
self.volume_factor = gain
self.music_lock = Lock("music__" + filename)
self.wait_event = threading.Event()
try:
print("Loading « {} »".format(self.name))
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 = pydub.AudioSegment.from_file(self.filename).set_frame_rate(Config.frame_rate).set_channels(Config.channels).set_sample_width(Config.sample_width).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))
else:
return 0
- def play(self, fade_in = 0, volume = 100, start_at = 0):
+ 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 + 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.start_playing()
-
- def before_loaded_playing(self, initial_frame = 0):
- self.current_frame = initial_frame
- with self.music_lock:
- segment = self.current_audio_segment
+ 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.stream = sd.RawOutputStream(samplerate=segment.frame_rate,
- channels=segment.channels,
- dtype='int' + str(8*segment.sample_width), # FIXME: ?
- latency=1.,
- callback=self.play_callback,
- finished_callback=self.finished_callback
- )
+ self.start_playing()
def on_enter_loaded_playing(self):
- self.stream.start()
-
- def on_enter_loaded_paused(self):
- self.stream.stop()
+ self.mixer.add_file(self)
def finished_callback(self):
if self.is_loaded_playing():
if self.is_loaded_stopping():
self.stopped()
- def on_enter_loaded_stopped(self):
+ def trigger_stopped_events(self):
+ self.mixer.remove_file(self)
self.wait_event.set()
- def play_callback(self, out_data, frame_count, time_info, status_flags):
+ def play_callback(self, out_data_length, frame_count):
+ if self.is_loaded_paused():
+ return b'\0' * out_data_length
+
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:
+ # FIXME: too slow
+ 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
- out_data[:] = audio_segment.ljust(len(out_data), b'\0')
+ 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())
+
+ 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
+ new_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo)
with self.music_lock:
- self.current_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo)
- self.stop_playing()
+ self.current_audio_segment = new_audio_segment
+ self.stop_playing()
if wait:
self.wait_end()
else:
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)
projects / perso / Immae / Projets / Python / MusicSampler.git / blobdiff