Pulse audio empty struct implementation. Working on it though

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4428 8ced0084-cf51-0410-be5f-012b33b47a6e

SConstruct

@@ -256,6 +256,9 @@ if env['openal']:
 
 env['HAVE_ALSA'] = conf.CheckPKG('alsa')
 
+env['HAVE_PULSEAUDIO'] = 0
+#env['HAVE_PULSEAUDIO'] = conf.CheckPKG('libpulse')
+
 # OpenCL
 env['HAVE_OPENCL'] = 0
 if env['opencl']:   

Source/Core/AudioCommon/Src/AudioCommon.cpp

@@ -23,6 +23,7 @@
 #include "NullSoundStream.h"
 #include "CoreAudioSoundStream.h"
 #include "OpenALStream.h"
+#include "PulseAudioStream.h"
 
 namespace AudioCommon 
 {	
@@ -43,6 +44,8 @@ namespace AudioCommon
 			soundStream = new OpenALStream(mixer);
 		if (backend == BACKEND_ALSA        && AlsaSound::isValid())
 			soundStream = new AlsaSound(mixer);
+		if (backend == BACKEND_PULSEAUDIO  && PulseAudio::isValid())
+			soundStream = new PulseAudio(mixer);
 		if (backend == BACKEND_NULL        && NullSound::isValid()) 
 			soundStream = new NullSound(mixer);
 
@@ -101,6 +104,8 @@ namespace AudioCommon
 			backends.push_back(BACKEND_OPENAL);
 		if (AlsaSound::isValid()) 
 			backends.push_back(BACKEND_ALSA);
+		if (PulseAudio::isValid()) 
+			backends.push_back(BACKEND_PULSEAUDIO);
 		if (NullSound::isValid()) 
 			backends.push_back(BACKEND_NULL);
 	   

Source/Core/AudioCommon/Src/AudioCommonConfig.h

@@ -27,6 +27,7 @@
 #define BACKEND_AOSOUND     "AOSound"
 #define BACKEND_OPENAL      "OpenAL"
 #define BACKEND_ALSA        "ALSA"
+#define BACKEND_PULSEAUDIO  "Pulse"
 #define BACKEND_NULL        "NullSound"
 
 struct AudioCommonConfig 

Source/Core/AudioCommon/Src/PulseAudioStream.cpp

@@ -0,0 +1,88 @@
+// 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/
+
+#include "Common.h"
+#include "Thread.h"
+
+#include "PulseAudioStream.h"
+
+#define BUFFER_SIZE 4096
+#define BUFFER_SIZE_BYTES (BUFFER_SIZE*2*2)
+
+PulseAudio::PulseAudio(CMixer *mixer) : SoundStream(mixer), thread_data(0), handle(NULL)
+{
+	mix_buffer = new u8[BUFFER_SIZE_BYTES];
+}
+
+PulseAudio::~PulseAudio()
+{
+	delete [] mix_buffer;
+}
+
+static void *ThreadTrampoline(void *args)
+{
+	reinterpret_cast<PulseAudio *>(args)->SoundLoop();
+	return NULL;
+}
+
+bool PulseAudio::Start()
+{
+	thread = new Common::Thread(&ThreadTrampoline, this);
+	thread_data = 0;
+	return true;
+}
+
+void PulseAudio::Stop()
+{
+	thread_data = 1;
+	delete thread;
+	thread = NULL;
+}
+
+void PulseAudio::Update()
+{
+	// don't need to do anything here.
+}
+
+// Called on audio thread.
+void PulseAudio::SoundLoop()
+{
+	PulseInit();
+	while (!thread_data)
+	{
+		int frames_to_deliver = 512;
+		m_mixer->Mix(reinterpret_cast<short *>(mix_buffer), frames_to_deliver);
+	}
+	PulseShutdown();
+	thread_data = 2;
+}
+
+bool PulseAudio::PulseInit()
+{
+	NOTICE_LOG(AUDIO, "Pulse successfully initialized.\n");
+	return true;
+}
+
+void PulseAudio::PulseShutdown()
+{
+	if (handle != NULL)
+	{
+
+		handle = NULL;
+	}
+}
+

Source/Core/AudioCommon/Src/PulseAudioStream.h

@@ -0,0 +1,71 @@
+// 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 _PULSE_AUDIO_STREAM_H
+#define _PULSE_AUDIO_STREAM_H
+
+#if defined(HAVE_PULSE) && HAVE_PULSE
+#include <pulse/simple.h>
+#include <pulse/error.h>
+#include <pulse/gccmacro.h>
+#endif
+
+#include "Common.h"
+#include "SoundStream.h"
+
+#include "Thread.h"
+
+class PulseAudio : public SoundStream
+{
+#if defined(HAVE_PULSE) && HAVE_PULSE
+public:
+	PulseAudio(CMixer *mixer);
+	virtual ~PulseAudio();
+
+	virtual bool Start();
+	virtual void SoundLoop();
+	virtual void Stop(); 
+
+	static bool isValid() {
+		return true;
+	}
+	virtual bool usesMixer() const { 
+		return true; 
+	}
+
+	virtual void Update();
+
+private:
+	bool PulseInit();
+	void PulseShutdown();
+
+	u8 *mix_buffer;
+	Common::Thread *thread;
+	// 0 = continue
+	// 1 = shutdown
+	// 2 = done shutting down.
+	volatile int thread_data;
+
+	snd_pcm_t *handle;
+#else
+public:
+	PulseAudio(CMixer *mixer) : SoundStream(mixer) {}
+#endif
+};
+
+#endif
+

Source/Core/AudioCommon/Src/SConscript

@@ -23,6 +23,9 @@ if acenv['HAVE_AO']:
 if acenv['HAVE_ALSA']:
     files += [ 'AlsaSoundStream.cpp' ]
 
+if acenv['HAVE_PULSEAUDIO']:
+    files += [ 'PulseAudioStream.cpp' ]
+
 if sys.platform == 'darwin':
     files += [ 'CoreAudioSoundStream.cpp' ]
     acenv['FRAMEWORKS'] = [ 'CoreAudio' ]