mirror of
https://github.com/libretro/scummvm.git
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144 lines
3.6 KiB
C++
144 lines
3.6 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001-2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*/
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#if defined(WIN32) && !defined(_WIN32_WCE)
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#include "common/stdafx.h"
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#include "sound/mpu401.h"
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#include "common/util.h"
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////////////////////////////////////////
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//
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// Windows MIDI driver
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//
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////////////////////////////////////////
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class MidiDriver_WIN : public MidiDriver_MPU401 {
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private:
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MIDIHDR _streamHeader;
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byte _streamBuffer[256]; // SysEx blocks should be no larger than 256 bytes
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HANDLE _streamEvent;
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HMIDIOUT _mo;
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bool _isOpen;
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void check_error(MMRESULT result);
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public:
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MidiDriver_WIN() : _isOpen(false) { }
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int open();
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void close();
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void send(uint32 b);
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void sysEx(const byte *msg, uint16 length);
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};
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int MidiDriver_WIN::open() {
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if (_isOpen)
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return MERR_ALREADY_OPEN;
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_streamEvent = CreateEvent(NULL, true, true, NULL);
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MMRESULT res = midiOutOpen((HMIDIOUT *)&_mo, MIDI_MAPPER, (unsigned long)_streamEvent, 0, CALLBACK_EVENT);
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if (res != MMSYSERR_NOERROR) {
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check_error(res);
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CloseHandle(_streamEvent);
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return MERR_DEVICE_NOT_AVAILABLE;
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}
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_isOpen = true;
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return 0;
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}
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void MidiDriver_WIN::close() {
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if (!_isOpen)
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return;
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_isOpen = false;
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MidiDriver_MPU401::close();
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midiOutUnprepareHeader(_mo, &_streamHeader, sizeof(_streamHeader));
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check_error(midiOutClose(_mo));
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CloseHandle(_streamEvent);
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}
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void MidiDriver_WIN::send(uint32 b) {
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union {
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DWORD dwData;
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BYTE bData[4];
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} u;
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u.bData[3] = (byte)((b & 0xFF000000) >> 24);
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u.bData[2] = (byte)((b & 0x00FF0000) >> 16);
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u.bData[1] = (byte)((b & 0x0000FF00) >> 8);
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u.bData[0] = (byte)(b & 0x000000FF);
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check_error(midiOutShortMsg(_mo, u.dwData));
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}
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void MidiDriver_WIN::sysEx(const byte *msg, uint16 length) {
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if (!_isOpen)
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return;
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if (WaitForSingleObject (_streamEvent, 2000) == WAIT_TIMEOUT) {
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warning ("Could not send SysEx - MMSYSTEM is still trying to send data.");
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return;
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}
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assert(length+2 <= 256);
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midiOutUnprepareHeader(_mo, &_streamHeader, sizeof(_streamHeader));
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// Add SysEx frame
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_streamBuffer[0] = 0xF0;
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memcpy(&_streamBuffer[1], msg, length);
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_streamBuffer[length+1] = 0xF7;
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_streamHeader.lpData = (char *)_streamBuffer;
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_streamHeader.dwBufferLength = length + 2;
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_streamHeader.dwBytesRecorded = length + 2;
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_streamHeader.dwUser = 0;
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_streamHeader.dwFlags = 0;
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MMRESULT result = midiOutPrepareHeader(_mo, &_streamHeader, sizeof(_streamHeader));
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if (result != MMSYSERR_NOERROR) {
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check_error (result);
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return;
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}
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ResetEvent(_streamEvent);
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result = midiOutLongMsg(_mo, &_streamHeader, sizeof(_streamHeader));
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if (result != MMSYSERR_NOERROR) {
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check_error(result);
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SetEvent(_streamEvent);
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return;
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}
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}
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void MidiDriver_WIN::check_error(MMRESULT result) {
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char buf[200];
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if (result != MMSYSERR_NOERROR) {
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midiOutGetErrorText(result, buf, 200);
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warning("MM System Error '%s'", buf);
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}
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}
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MidiDriver *MidiDriver_WIN_create() {
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return new MidiDriver_WIN();
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}
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#endif
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