Emulate the Organya thread pauses

Now there's a 100ms pause between songs.

Currently only the miniaudio backend supports this.

src/Backends/Audio.h

@@ -20,3 +20,4 @@ void AudioBackend_SetSoundPan(AudioBackend_Sound *sound, long pan);
 
 void AudioBackend_SetOrganyaCallback(void (*callback)(void));
 void AudioBackend_SetOrganyaTimer(unsigned int milliseconds);
+void AudioBackend_SleepOrganya(unsigned int milliseconds);

src/Backends/Audio/miniaudio.cpp

@@ -27,6 +27,7 @@ static unsigned long output_frequency;
 
 static void (*organya_callback)(void);
 static unsigned int organya_callback_milliseconds;
+static unsigned int organya_sleep_timer;
 
 static void MixSoundsAndUpdateOrganya(long *stream, size_t frames_total)
 {
@@ -47,6 +48,19 @@ static void MixSoundsAndUpdateOrganya(long *stream, size_t frames_total)
 		// Instead, we can just do this.
 		unsigned int frames_done = 0;
 
+		// Don't process Organya when it's meant to be sleeping
+		const unsigned int frames_to_do = MIN(organya_sleep_timer, frames_total - frames_done);
+
+		if (frames_to_do != 0)
+		{
+			ma_mutex_lock(&mutex);
+			Mixer_MixSounds(stream, frames_to_do);
+			ma_mutex_unlock(&mutex);
+
+			frames_done += frames_to_do;
+			organya_sleep_timer -= frames_to_do;
+		}
+
 		while (frames_done != frames_total)
 		{
 			static unsigned long organya_countdown;
@@ -307,3 +321,12 @@ void AudioBackend_SetOrganyaTimer(unsigned int milliseconds)
 
 	ma_mutex_unlock(&organya_mutex);
 }
+
+void AudioBackend_SleepOrganya(unsigned int milliseconds)
+{
+	ma_mutex_lock(&organya_mutex);
+
+	organya_sleep_timer = (milliseconds * output_frequency) / 1000;
+
+	ma_mutex_unlock(&organya_mutex);
+}

src/Organya.cpp

@@ -868,7 +868,7 @@ void StopOrganyaMusic(void)
 	memset(key_on, 0, sizeof(key_on));
 	memset(key_twin, 0, sizeof(key_twin));
 
-//	Sleep(100);	// TODO - Emulate this
+	AudioBackend_SleepOrganya(100);
 }
 
 void SetOrganyaFadeout(void)