Add menu audio controls and menu music

engine/sdl2.py

@@ -128,6 +128,7 @@ class GameWindow:
         self.audio_devs["base"] = sdl2.SDL_OpenAudioDevice(None, 0, audio_spec, None, 0)
         self.audio_devs["effects"] = sdl2.SDL_OpenAudioDevice(None, 0, audio_spec, None, 0)
         self.audio_devs["music"] = sdl2.SDL_OpenAudioDevice(None, 0, audio_spec, None, 0)
+        self.sound_volume = sdl2.SDL_MIX_MAXVOLUME
         self.music_enabled = False
         self.music_volume = 128
         self.music_track = None
@@ -149,12 +150,20 @@ class GameWindow:
         self.music_enabled = True
         sdlmixer.Mix_VolumeMusic(self.music_volume)
 
-    def set_volume(self, volume_percent):
+    def set_sound_volume(self, volume_percent):
+        clamped = max(0, min(int(volume_percent), 100))
+        self.sound_volume = int(round(clamped * sdl2.SDL_MIX_MAXVOLUME / 100))
+
+    def set_music_volume(self, volume_percent):
         clamped = max(0, min(int(volume_percent), 100))
         self.music_volume = int(round(clamped * 128 / 100))
         if self.music_enabled and sdlmixer is not None:
             sdlmixer.Mix_VolumeMusic(self.music_volume)
 
+    def set_volume(self, volume_percent):
+        self.set_sound_volume(volume_percent)
+        self.set_music_volume(volume_percent)
+
     def play_music(self, music_file, loop=True):
         if not self.audio or not self.music_enabled or sdlmixer is None:
             return False
@@ -498,12 +507,31 @@ class GameWindow:
         spec = SDL_AudioSpec(freq=22050, aformat=sdl2.AUDIO_U8, channels=1, samples=2048)
         if sdl2.SDL_LoadWAV_RW(rw, 1, byref(spec), byref(_buf), byref(_length)) == None:
             raise RuntimeError("Failed to load WAV")
+
+        if self.sound_volume <= 0:
+            sdl2.SDL_FreeWAV(_buf)
+            return
         
         devid = self.audio_devs[tag]
         # Clear any queued audio
         sdl2.SDL_ClearQueuedAudio(devid)
+        buffer_length = int(_length.value)
+
+        if self.sound_volume < sdl2.SDL_MIX_MAXVOLUME:
+            scaled_buffer = create_string_buffer(buffer_length)
+            sdl2.SDL_MixAudioFormat(
+                cast(scaled_buffer, POINTER(sdl2.Uint8)),
+                _buf,
+                spec.format,
+                buffer_length,
+                self.sound_volume,
+            )
+            sdl2.SDL_QueueAudio(devid, cast(scaled_buffer, POINTER(sdl2.Uint8)), buffer_length)
+        else:
+            sdl2.SDL_QueueAudio(devid, _buf, buffer_length)
+
+        sdl2.SDL_FreeWAV(_buf)
         # Start playing audio
-        sdl2.SDL_QueueAudio(devid, _buf, _length)
         sdl2.SDL_PauseAudioDevice(devid, 0)
 
     def stop_sound(self):