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Diffstat (limited to 'backends/midi/coremidi.cpp')
| -rw-r--r-- | backends/midi/coremidi.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/backends/midi/coremidi.cpp b/backends/midi/coremidi.cpp new file mode 100644 index 0000000000..f60b84cc5d --- /dev/null +++ b/backends/midi/coremidi.cpp @@ -0,0 +1,162 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2001-2005 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. + * + * $Header$ + */ + +#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(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); + + byte status_byte = (b & 0x000000FF); + byte first_byte = (b & 0x0000FF00) >> 8; + byte second_byte = (b & 0x00FF0000) >> 16; + + MIDIPacketList packetList; + MIDIPacket *packet = &packetList.packet[0]; + + packetList.numPackets = 1; + + packet->timeStamp = 0; + packet->length = 3; + packet->data[0] = status_byte; + packet->data[1] = first_byte; + packet->data[2] = second_byte; + + MIDISend(mOutPort, mDest, &packetList); + +} + +void MidiDriver_CoreMIDI::sysEx(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 |