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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001-2006 The ScummVM 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; 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#ifdef MACOSX
#include "common/stdafx.h"
#include "common/config-manager.h"
#include "common/util.h"
#include "sound/mpu401.h"
#include <CoreMIDI/CoreMIDI.h>
/*
For information on how to unify the CoreMidi and MusicDevice code:
http://lists.apple.com/archives/Coreaudio-api/2005/Jun/msg00194.html
http://lists.apple.com/archives/coreaudio-api/2003/Mar/msg00248.html
http://lists.apple.com/archives/coreaudio-api/2003/Jul/msg00137.html
*/
/* CoreMIDI MIDI driver
* By Max Horn
*/
class MidiDriver_CoreMIDI : public MidiDriver_MPU401 {
public:
MidiDriver_CoreMIDI();
~MidiDriver_CoreMIDI();
int open();
void close();
void send(uint32 b);
void sysEx(const byte *msg, uint16 length);
private:
MIDIClientRef mClient;
MIDIPortRef mOutPort;
MIDIEndpointRef mDest;
};
MidiDriver_CoreMIDI::MidiDriver_CoreMIDI()
: mClient(0), mOutPort(0), mDest(0) {
OSStatus err;
err = MIDIClientCreate(CFSTR("ScummVM MIDI Driver for OS X"), NULL, NULL, &mClient);
}
MidiDriver_CoreMIDI::~MidiDriver_CoreMIDI() {
if (mClient)
MIDIClientDispose(mClient);
mClient = 0;
}
int MidiDriver_CoreMIDI::open() {
if (mDest)
return MERR_ALREADY_OPEN;
OSStatus err = noErr;
mOutPort = 0;
int dests = MIDIGetNumberOfDestinations();
if (dests > 0 && mClient) {
mDest = MIDIGetDestination(0);
err = MIDIOutputPortCreate( mClient,
CFSTR("scummvm_output_port"),
&mOutPort);
} else {
return MERR_DEVICE_NOT_AVAILABLE;
}
if (err != noErr)
return MERR_CANNOT_CONNECT;
return 0;
}
void MidiDriver_CoreMIDI::close() {
MidiDriver_MPU401::close();
if (mOutPort && mDest) {
MIDIPortDispose(mOutPort);
mOutPort = 0;
mDest = 0;
}
}
void MidiDriver_CoreMIDI::send(uint32 b) {
assert(mOutPort != NULL);
assert(mDest != NULL);
// Extract the MIDI data
byte status_byte = (b & 0x000000FF);
byte first_byte = (b & 0x0000FF00) >> 8;
byte second_byte = (b & 0x00FF0000) >> 16;
// Generate a single MIDI packet with that data
MIDIPacketList packetList;
MIDIPacket *packet = &packetList.packet[0];
packetList.numPackets = 1;
packet->timeStamp = 0;
packet->data[0] = status_byte;
packet->data[1] = first_byte;
packet->data[2] = second_byte;
// Compute the correct length of the MIDI command. This is important,
// else things may screw up badly...
switch (status_byte & 0xF0) {
case 0x80: // Note Off
case 0x90: // Note On
case 0xA0: // Polyphonic Aftertouch
case 0xB0: // Controller Change
case 0xE0: // Pitch Bending
packet->length = 3;
break;
case 0xC0: // Programm Change
case 0xD0: // Monophonic Aftertouch
packet->length = 2;
break;
default:
warning("CoreMIDI driver encountered unsupported status byte: 0x%02x", status_byte);
packet->length = 3;
break;
}
// Finally send it out to the synthesizer.
MIDISend(mOutPort, mDest, &packetList);
}
void MidiDriver_CoreMIDI::sysEx(const byte *msg, uint16 length) {
assert(mOutPort != NULL);
assert(mDest != NULL);
byte buf[384];
MIDIPacketList *packetList = (MIDIPacketList *)buf;
MIDIPacket *packet = packetList->packet;
assert(sizeof(buf) >= sizeof(UInt32) + sizeof(MIDITimeStamp) + sizeof(UInt16) + length + 2);
packetList->numPackets = 1;
packet->timeStamp = 0;
// Add SysEx frame if missing
if (*msg != 0xF0) {
packet->length = length + 2;
packet->data[0] = 0xF0;
memcpy(packet->data + 1, msg, length);
packet->data[length + 1] = 0xF7;
} else {
packet->length = length;
memcpy(packet->data, msg, length);
}
MIDISend(mOutPort, mDest, packetList);
}
MidiDriver *MidiDriver_CoreMIDI_create() {
return new MidiDriver_CoreMIDI();
}
#endif // MACOSX
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