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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.
*
* $URL$
* $Id$
*/
#if defined(WIN32) && !defined(_WIN32_WCE)
#include "common/stdafx.h"
#include "sound/mpu401.h"
#include "common/util.h"
////////////////////////////////////////
//
// Windows MIDI driver
//
////////////////////////////////////////
class MidiDriver_WIN : public MidiDriver_MPU401 {
private:
MIDIHDR _streamHeader;
byte _streamBuffer[256]; // SysEx blocks should be no larger than 256 bytes
HANDLE _streamEvent;
HMIDIOUT _mo;
bool _isOpen;
void check_error(MMRESULT result);
public:
MidiDriver_WIN() : _isOpen(false) { }
int open();
void close();
void send(uint32 b);
void sysEx(const byte *msg, uint16 length);
};
int MidiDriver_WIN::open() {
if (_isOpen)
return MERR_ALREADY_OPEN;
_streamEvent = CreateEvent(NULL, true, true, NULL);
MMRESULT res = midiOutOpen((HMIDIOUT *)&_mo, MIDI_MAPPER, (unsigned long)_streamEvent, 0, CALLBACK_EVENT);
if (res != MMSYSERR_NOERROR) {
check_error(res);
CloseHandle(_streamEvent);
return MERR_DEVICE_NOT_AVAILABLE;
}
_isOpen = true;
return 0;
}
void MidiDriver_WIN::close() {
if (!_isOpen)
return;
_isOpen = false;
MidiDriver_MPU401::close();
midiOutUnprepareHeader(_mo, &_streamHeader, sizeof(_streamHeader));
check_error(midiOutClose(_mo));
CloseHandle(_streamEvent);
}
void MidiDriver_WIN::send(uint32 b) {
union {
DWORD dwData;
BYTE bData[4];
} u;
u.bData[3] = (byte)((b & 0xFF000000) >> 24);
u.bData[2] = (byte)((b & 0x00FF0000) >> 16);
u.bData[1] = (byte)((b & 0x0000FF00) >> 8);
u.bData[0] = (byte)(b & 0x000000FF);
check_error(midiOutShortMsg(_mo, u.dwData));
}
void MidiDriver_WIN::sysEx(const byte *msg, uint16 length) {
if (!_isOpen)
return;
if (WaitForSingleObject (_streamEvent, 2000) == WAIT_TIMEOUT) {
warning ("Could not send SysEx - MMSYSTEM is still trying to send data.");
return;
}
assert(length+2 <= 256);
midiOutUnprepareHeader(_mo, &_streamHeader, sizeof(_streamHeader));
// Add SysEx frame
_streamBuffer[0] = 0xF0;
memcpy(&_streamBuffer[1], msg, length);
_streamBuffer[length+1] = 0xF7;
_streamHeader.lpData = (char *)_streamBuffer;
_streamHeader.dwBufferLength = length + 2;
_streamHeader.dwBytesRecorded = length + 2;
_streamHeader.dwUser = 0;
_streamHeader.dwFlags = 0;
MMRESULT result = midiOutPrepareHeader(_mo, &_streamHeader, sizeof(_streamHeader));
if (result != MMSYSERR_NOERROR) {
check_error (result);
return;
}
ResetEvent(_streamEvent);
result = midiOutLongMsg(_mo, &_streamHeader, sizeof(_streamHeader));
if (result != MMSYSERR_NOERROR) {
check_error(result);
SetEvent(_streamEvent);
return;
}
}
void MidiDriver_WIN::check_error(MMRESULT result) {
char buf[200];
if (result != MMSYSERR_NOERROR) {
midiOutGetErrorText(result, buf, 200);
warning("MM System Error '%s'", buf);
}
}
MidiDriver *MidiDriver_WIN_create() {
return new MidiDriver_WIN();
}
#endif
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