Re-implemented the NullSound back-end. Allows Dolphin to be used on hosts with no sound hardware. Emulates strict DSP timing in the DSP HLE plugin.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6329 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/AudioCommon/Src/NullSoundStream.h

@@ -0,0 +1,48 @@
+// Copyright (C) 2003 Dolphin Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official SVN repository and contact information can be found at
+// http://code.google.com/p/dolphin-emu/
+
+#ifndef _NULLSOUNDSTREAM_H_
+#define _NULLSOUNDSTREAM_H_
+
+#include "SoundStream.h"
+#include "Thread.h"
+
+#define BUF_SIZE (48000 * 4 / 32)
+
+class NullSound : public SoundStream
+{
+    // playback position
+    short realtimeBuffer[BUF_SIZE / sizeof(short)];
+
+public:
+	NullSound(CMixer *mixer, void *hWnd = NULL)
+		: SoundStream(mixer)
+	{}
+
+    virtual ~NullSound() {}
+ 
+	virtual bool Start();
+    virtual void SoundLoop();
+	virtual void SetVolume(int volume);
+    virtual void Stop();
+	virtual void Clear(bool mute);
+    static bool isValid() { return true; }
+    virtual bool usesMixer() const { return true; }
+    virtual void Update();
+};
+
+#endif //_NULLSOUNDSTREAM_H_