Audio system update - HLE plugin submitted, homebrew has sound, and also Mario movies!! (this was very unexpected). This also acts as a frame limiter. Might provide an option to turn it off in the future.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@227 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_DSP_HLE/Src/MailHandler.cpp

@@ -0,0 +1,98 @@
+// Copyright (C) 2003-2008 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 "MailHandler.h"
+
+CMailHandler::CMailHandler()
+{}
+
+CMailHandler::~CMailHandler()
+{
+	Clear();
+}
+
+void CMailHandler::PushMail(u32 _Mail)
+{
+	m_Mails.push(_Mail);
+
+	Update();
+}
+
+u16 CMailHandler::ReadDSPMailboxHigh()
+{
+	// check if we have a mail for the core
+	if (!m_Mails.empty())
+	{
+		u16 result = (m_Mails.front() >> 16) & 0xFFFF;
+
+		Update();
+
+		return(result);
+	}
+
+	return(0x00);
+}
+
+u16 CMailHandler::ReadDSPMailboxLow()
+{
+	// check if we have a mail for the core
+	if (!m_Mails.empty())
+	{
+		u16 result = m_Mails.front() & 0xFFFF;
+		m_Mails.pop();
+
+		Update();
+
+		return(result);
+	}
+
+	return(0x00);
+}
+
+void CMailHandler::Clear()
+{
+	while (!m_Mails.empty())
+	{
+		m_Mails.pop();
+	}
+}
+
+bool CMailHandler::IsEmpty()
+{
+	return(m_Mails.empty());
+}
+
+void CMailHandler::Halt(bool _Halt)
+{
+	if (_Halt)
+	{
+		Clear();
+		m_Mails.push(0x80544348);
+	}
+
+	Update();
+}
+
+void CMailHandler::Update()
+{
+	if (!IsEmpty())
+	{
+		//       g_dspInitialize.pGenerateDSPInterrupt();
+	}
+}
+
+