1 files changed, 41 insertions, 0 deletions
diff --git a/Source/Core/AudioCommon/NullSoundStream.cpp b/Source/Core/AudioCommon/NullSoundStream.cpp
new file mode 100644
index 0000000000..99bf8aae4b
--- /dev/null
+++ b/Source/Core/AudioCommon/NullSoundStream.cpp
@@ -0,0 +1,41 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#include "NullSoundStream.h"
+#include "../Core/HW/SystemTimers.h"
+#include "../Core/HW/AudioInterface.h"
+
+void NullSound::SoundLoop()
+{
+}
+
+bool NullSound::Start()
+{
+	return true;
+}
+
+void NullSound::SetVolume(int volume)
+{
+}
+
+void NullSound::Update()
+{
+	// num_samples_to_render in this update - depends on SystemTimers::AUDIO_DMA_PERIOD.
+	const u32 stereo_16_bit_size = 4;
+	const u32 dma_length = 32;
+	const u64 audio_dma_period = SystemTimers::GetTicksPerSecond() / (AudioInterface::GetAIDSampleRate() * stereo_16_bit_size / dma_length);
+	const u64 ais_samples_per_second = 48000 * stereo_16_bit_size;
+	const u64 num_samples_to_render = (audio_dma_period * ais_samples_per_second) / SystemTimers::GetTicksPerSecond();
+
+	m_mixer->Mix(realtimeBuffer, (unsigned int)num_samples_to_render);
+}
+
+void NullSound::Clear(bool mute)
+{
+	m_muted = mute;
+}
+
+void NullSound::Stop()
+{
+}