Add a common mixer

[perso/Immae/Projets/Python/MusicSampler.git] / helpers / music_file.py

diff --git a/helpers/music_file.py b/helpers/music_file.py
index ebe458beb595aefc0d9ac2c9f5d0de2f35f985e5..6da547b8473678b78985272ed7b72f548ab4b368 100644 (file)
--- a/helpers/music_file.py
+++ b/helpers/music_file.py
@@ -3,7 +3,6 @@ import pydub
 import time
 from transitions.extensions import HierarchicalMachine as Machine
 
-import sounddevice as sd
 import os.path
 
 from .lock import Lock
@@ -27,7 +26,7 @@ class MusicFile(Machine):
             { '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')
@@ -35,7 +34,6 @@ class MusicFile(Machine):
         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
@@ -50,7 +48,7 @@ class MusicFile(Machine):
             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(44100).set_channels(2).set_sample_width(2).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:
@@ -94,26 +92,10 @@ class MusicFile(Machine):
             else:
                 self.a_s_with_effect = None
 
-        self.before_loaded_playing()
         self.start_playing()
 
-    def before_loaded_playing(self):
-        with self.music_lock:
-            segment = self.current_audio_segment
-
-            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
-                            )
-
     def on_enter_loaded_playing(self):
-        self.stream.start()
-
-    def on_enter_loaded_paused(self):
-        self.stream.stop()
+        self.mapping.mixer.add_file(self)
 
     def finished_callback(self):
         if self.is_loaded_playing():
@@ -121,10 +103,14 @@ class MusicFile(Machine):
         if self.is_loaded_stopping():
             self.stopped()
 
-    def on_enter_loaded_stopped(self):
+    def trigger_stopped_events(self):
+        self.mapping.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:
             [data, nb_frames] = self.get_next_sample(frame_count)
             if nb_frames < frame_count:
@@ -135,9 +121,9 @@ class MusicFile(Machine):
                     data += new_data
                     nb_frames += new_nb_frames
                 elif nb_frames == 0:
-                    raise sd.CallbackStop
+                    threading.Thread(name = "MSFinishedCallback", target=self.finished_callback).start()
 
-            out_data[:] = data.ljust(len(out_data), b'\0')
+            return data.ljust(out_data_length, b'\0')
 
     def get_next_sample(self, frame_count):
         fw = self.audio_segment_frame_width
@@ -189,9 +175,10 @@ class MusicFile(Machine):
 
             # 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: