Starting audio common

Going to slowly make LLE-testing and HLE use it
(This commit is missing some proj files for windows)


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2741 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/AudioCommon/Src/AOSoundStream.cpp

@@ -0,0 +1,96 @@
+// Copyright (C) 2003-2009 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/
+
+#include <string.h>
+
+#include "AOSoundStream.h"
+
+#if defined(HAVE_AO) && HAVE_AO
+
+void AOSound::SoundLoop()
+{
+    ao_initialize();
+    default_driver = ao_default_driver_id();
+    format.bits = 16;
+    format.channels = 2;
+    format.rate = sampleRate;
+    format.byte_format = AO_FMT_LITTLE;
+		
+    device = ao_open_live(default_driver, &format, NULL /* no options */);
+    if (!device)
+	{
+		PanicAlert("DSP_HLE: Error opening AO device.\n");
+		ao_shutdown();
+		Stop();
+		return;
+    }   
+
+    buf_size = format.bits/8 * format.channels * format.rate;
+
+    while (!threadData)
+	{
+        soundCriticalSection->Enter();
+                
+        uint_32 numBytesToRender = 256;
+        (*callback)(realtimeBuffer, numBytesToRender >> 2, 16, sampleRate, 2);
+        ao_play(device, (char*)realtimeBuffer, numBytesToRender);
+        soundCriticalSection->Leave();
+        soundSyncEvent->Wait();
+	}
+}
+
+void *soundThread(void *args)
+{
+	((AOSound *)args)->SoundLoop();
+	return NULL;
+}
+
+bool AOSound::Start()
+{
+	memset(realtimeBuffer, 0, sizeof(realtimeBuffer));
+
+    soundSyncEvent = new Common::Event();
+    soundSyncEvent->Init();
+
+    soundCriticalSection = new Common::CriticalSection(1);
+
+    thread = new Common::Thread(soundThread, (void *)this);
+    return true;
+}
+
+void AOSound::Update()
+{
+    soundSyncEvent->Set();
+}
+    
+void AOSound::Stop()
+{
+    soundCriticalSection->Enter();
+    threadData = 1;
+    soundSyncEvent->Set();
+    soundCriticalSection->Leave();
+    soundSyncEvent->Shutdown();
+    delete soundCriticalSection;
+    delete thread;
+    delete soundSyncEvent;
+
+    ao_close(device);
+    device = NULL;
+    ao_shutdown();
+}
+
+#endif