From 98b32db971856143c753581e3af1829124ee280b Mon Sep 17 00:00:00 2001
From: Sjoerd van der Berg <harekiet@users.sourceforge.net>
Date: Fri, 28 Mar 2003 07:57:30 +0000
Subject: [PATCH] CoreAudio midi support

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@824
---
 src/gui/midi_coreaudio.h | 92 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 src/gui/midi_coreaudio.h

diff --git a/src/gui/midi_coreaudio.h b/src/gui/midi_coreaudio.h
new file mode 100644
index 00000000..8b95418c
--- /dev/null
+++ b/src/gui/midi_coreaudio.h
@@ -0,0 +1,92 @@
+/*
+ *  Copyright (C) 2002-2003  The DOSBox Team
+ *
+ *  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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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 Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <AudioUnit/AudioUnit.h>
+
+class MidiHandler_coreaudio : public MidiHandler {
+private:
+	AudioUnit m_musicDevice;
+	AudioUnit m_outputUnit;
+public:
+	MidiHandler_coreaudio() : m_musicDevice(0), m_outputUnit(0) {}
+	char * GetName(void) { return "coreaudio"; }
+	bool Open(const char * conf) {
+		int err;
+		AudioUnitConnection auconnect;
+		ComponentDescription compdesc;
+		Component compid;
+	
+		if (m_outputUnit)
+			return false;
+		
+		// Open the Music Device
+		compdesc.componentType = kAudioUnitComponentType;
+		compdesc.componentSubType = kAudioUnitSubType_MusicDevice;
+		compdesc.componentManufacturer = kAudioUnitID_DLSSynth;
+		compdesc.componentFlags = 0;
+		compdesc.componentFlagsMask = 0;
+		compid = FindNextComponent(NULL, &compdesc);
+		m_musicDevice = (AudioUnit) OpenComponent(compid);
+	
+		// open the output unit
+		m_outputUnit = (AudioUnit) OpenDefaultComponent(kAudioUnitComponentType, kAudioUnitSubType_Output);
+	
+		// connect the units
+		auconnect.sourceAudioUnit = m_musicDevice;
+		auconnect.sourceOutputNumber = 0;
+		auconnect.destInputNumber = 0;
+		err =
+			AudioUnitSetProperty(m_outputUnit, kAudioUnitProperty_MakeConnection, kAudioUnitScope_Input, 0,
+													 (void *)&auconnect, sizeof(AudioUnitConnection));
+	
+		// initialize the units
+		AudioUnitInitialize(m_musicDevice);
+		AudioUnitInitialize(m_outputUnit);
+	
+		// start the output
+		AudioOutputUnitStart(m_outputUnit);
+	
+		return true;
+	}
+	
+	void Close(void) {
+		if (m_outputUnit) {
+			AudioOutputUnitStop(m_outputUnit);
+			CloseComponent(m_outputUnit);
+			m_outputUnit = 0;
+		}
+		if (m_musicDevice) {
+			CloseComponent(m_musicDevice);
+			m_musicDevice = 0;
+		}
+	}
+	
+	void PlayMsg(Bit32u msg) {
+		MusicDeviceMIDIEvent(m_musicDevice,
+				(msg & 0x000000FF),
+				(msg & 0x0000FF00) >> 8,
+				(msg & 0x00FF0000) >> 16,
+				0);
+	}
+	
+	void PlaySysex(Bit8u * sysex, Bitu len) {
+		MusicDeviceSysEx(m_musicDevice, sysex, len);
+	}
+};
+
+MidiHandler_coreaudio Midi_coreaudio;