Fix volume control (pythonarcade#610)

* add soloud dynamic library support for linux

* add soloud dynamic library support for linux

* update

* fix stop_sound

* update import

* add stop method to Sound class

* add soloud to setup.py

* update package data in setup.py

* add __init__ for soloud

* update import

* add voice_handle and fix volume methods

* Add demonstration of volume control to sound demo

Co-authored-by: Paul V Craven <paul@cravenfamily.com>

arcade/examples/sound_demo.py

@@ -28,6 +28,8 @@ def play(self):
         """ Play """
         self.sound.play(pan=self.pan, volume=self.volume)
 
+
+
 
 class AudioStreamButton(arcade.SpriteSolidColor):
     """ Button, click-for-streaming-sound """
@@ -41,6 +43,14 @@ def play(self):
         """ Play """
         self.sound.play(pan=self.pan, volume=self.volume)
 
+    def volume_up(self):
+        vol = self.sound.get_volume()
+        self.sound.set_volume(vol+.1)
+        print(f"Volume: {self.sound.get_volume()}")
+
+    def stream_position(self):
+        print(f"Current position: {self.sound.get_stream_position()}")
+
 
 class MyGame(arcade.Window):
     """
@@ -197,7 +207,13 @@ def on_mouse_press(self, x, y, button, key_modifiers):
         hit_sprites = arcade.get_sprites_at_point((x, y), self.button_sprites)
         for sprite in hit_sprites:
             button_sprite = typing.cast(SoundButton, sprite)
-            button_sprite.play()
+            if button == arcade.MOUSE_BUTTON_LEFT:
+                button_sprite.play()
+            elif button == arcade.MOUSE_BUTTON_RIGHT: # right click to increase volume on currently playing sound
+                if button_sprite.sound.voice_handle:
+                    button_sprite.volume_up()
+                    button_sprite.stream_position()
+
 
     def on_mouse_release(self, x, y, button, key_modifiers):
         """

arcade/sound.py

@@ -24,6 +24,8 @@ def __init__(self, file_name: str, streaming: bool = False):
         self.file_name: str = ""
         self.wav_file:Union[soloud.WavStream, soloud.Wav]
 
+        self.voice_handle = None # needed for volume control
+
         if not _audiolib:
             return
 
@@ -52,11 +54,11 @@ def play(self, volume=1.0, pan=0.0):
         if not _audiolib:
             return
 
-        _audiolib.play(self.wav_file,
-                       aVolume=volume,
-                       aPan=pan,
-                       aPaused=0,
-                       aBus=0)
+        self.voice_handle = _audiolib.play(self.wav_file,
+                                           aVolume=volume,
+                                           aPan=pan,
+                                           aPaused=0,
+                                           aBus=0)
 
     def stop(self):
         """
@@ -75,27 +77,27 @@ def get_length(self):
     # --- These functions should work, but instead just return zero or otherwise
     # don't appear functional.
 
-    # def get_volume(self):
-    #     """ Get the current volume """
-    #     if not _audiolib:
-    #         return 0
-    #     return _audiolib.get_volume(self.wav_file.objhandle)
-    #
-    # def set_volume(self, volume):
-    #     """ Set the current volume. Doesn't seem to work.  """
-    #     if not _audiolib:
-    #         return
-    #     self.wav_file.set_volume(volume)
-    #
-    # def set_left_right_volume(self, left_volume, right_volume):
-    #     """ Set absolute left/right volume """
-    #     if not _audiolib:
-    #         return
-    #     _audiolib.set_pan_absolute(self.wav_file.objhandle, left_volume, right_volume)
-    #
-    # def get_stream_position(self):
-    #     """ This always returns zero for some unknown reason. """
-    #     return _audiolib.get_stream_position(self.wav_file.objhandle)
+    def get_volume(self):
+        """ Get the current volume """
+        if not _audiolib:
+            return 0
+        return _audiolib.get_volume(self.voice_handle)
+
+    def set_volume(self, volume):
+        """ Set the current volume. """
+        if not _audiolib:
+            return
+        _audiolib.set_volume(self.voice_handle, volume)
+
+    def set_left_right_volume(self, left_volume, right_volume):
+        """ Set absolute left/right volume """
+        if not _audiolib:
+            return
+        _audiolib.set_pan_absolute(self.voice_handle, left_volume, right_volume)
+
+    def get_stream_position(self):
+        """ This always returns zero for some unknown reason. """
+        return _audiolib.get_stream_position(self.voice_handle)
 
 
 def load_sound(file_name: str):

setup.py

@@ -72,7 +72,6 @@ def execfile(filepath, globals=None, locals=None):
               "Programming Language :: Python :: Implementation :: CPython",
               "Topic :: Software Development :: Libraries :: Python Modules",
               ],
-
           package_data={'arcade': ['resources/gui_themes/Fantasy/Buttons/*',
                                    'resources/gui_themes/Fantasy/DialogueBox/*',
                                    'resources/gui_themes/Fantasy/Menu/*',