Add debugger

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

diff --git a/helpers/music_file.py b/helpers/music_file.py
index 8b1c4804f56fdefac13698f0502d77cba5b077c0..5b0d0dffdf2205d90e5c7fddbb3a2723860db659 100644 (file)
--- a/helpers/music_file.py
+++ b/helpers/music_file.py
@@ -3,17 +3,14 @@ import pydub
 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, debug_print, error_print
+from .mixer import Mixer
 
 file_lock = Lock("file")
 
-pyaudio = pa.PyAudio()
-
 class MusicFile(Machine):
     def __init__(self, filename, mapping, name = None, gain = 1):
         states = [
@@ -30,7 +27,7 @@ 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')
@@ -38,7 +35,6 @@ 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
@@ -51,18 +47,19 @@ class MusicFile(Machine):
     def on_enter_loading(self):
         with file_lock:
             try:
-                print("Loading « {} »".format(self.name))
+                debug_print("Loading « {} »".format(self.name))
+                self.mixer = self.mapping.mixer or Mixer()
                 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))
+                error_print("failed to load « {} »: {}".format(self.name, e))
                 self.loading_error = e
                 self.fail()
             else:
                 self.success()
-                print("Loaded « {} »".format(self.name))
+                debug_print("Loaded « {} »".format(self.name))
 
     def check_is_loaded(self):
         return self.state.startswith('loaded_')
@@ -97,26 +94,10 @@ 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.mixer.add_file(self)
 
     def finished_callback(self):
         if self.is_loaded_playing():
@@ -124,10 +105,14 @@ class MusicFile(Machine):
         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:
             [data, nb_frames] = self.get_next_sample(frame_count)
             if nb_frames < frame_count:
@@ -138,9 +123,10 @@ class MusicFile(Machine):
                     data += new_data
                     nb_frames += new_nb_frames
                 elif nb_frames == 0:
-                    raise sd.CallbackStop
+                    # FIXME: too slow
+                    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
@@ -190,11 +176,10 @@ class MusicFile(Machine):
             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:
@@ -224,13 +209,3 @@ class MusicFile(Machine):
         self.wait_event.clear()
         self.wait_event.wait()
 
-# Add some more functions to AudioSegments
-def get_sample_slice_data(self, start_sample=0, end_sample=float('inf')):
-    max_val = int(self.frame_count())
-
-    start_i = max(start_sample, 0) * self.frame_width
-    end_i =   min(end_sample, max_val) * self.frame_width
-
-    return self._data[start_i:end_i]
-
-pydub.AudioSegment.get_sample_slice_data = get_sample_slice_data