Fixed a buffer overflow in the OpenAL buffer.

Source/Core/AudioCommon/Src/OpenALStream.cpp

@@ -200,6 +200,7 @@ void OpenALStream::SoundLoop()
 		u64 num_samples_to_render = (audio_dma_period * ais_samples_per_second) / SystemTimers::GetTicksPerSecond();
 
 		unsigned int numSamples = (unsigned int)num_samples_to_render;
+		unsigned int minSamples = surround_capable ? 240 : 0; // DPL2 accepts 240 samples minimum (FWRDURATION)
 
 		numSamples = (numSamples > OAL_MAX_SAMPLES) ? OAL_MAX_SAMPLES : numSamples;
 		numSamples = m_mixer->Mix(realtimeBuffer, numSamples);
@@ -236,9 +237,15 @@ void OpenALStream::SoundLoop()
 				// Adjust SETTING_SEQUENCE_MS to balance between lag vs hollow audio
 				soundTouch.setSetting(SETTING_SEQUENCE_MS, (int)(1 / (rate * rate)));
 				soundTouch.setTempo(rate);
+				if (rate > 10)
+				{
+					soundTouch.clear();
+				}
 			}
-			unsigned int nSamples = soundTouch.receiveSamples(sampleBuffer, OAL_MAX_SAMPLES * SIZE_FLOAT * SURROUND_CHANNELS * OAL_MAX_BUFFERS);
-			if (nSamples > 0)
+
+			unsigned int nSamples = soundTouch.receiveSamples(sampleBuffer, OAL_MAX_SAMPLES * SIZE_FLOAT * OAL_MAX_BUFFERS);
+
+			if (nSamples > minSamples)
 			{
 				// Remove the Buffer from the Queue.  (uiBuffer contains the Buffer ID for the unqueued Buffer)
 				if (iBuffersFilled == 0)