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ypa1.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/backends/midi/ypa1.cpp $
 * $Id: ypa1.cpp 30944 2008-02-23 22:50:18Z sev $
 */

#include "sound/mpu401.h"
#include "common/util.h"

#include "Pa1Lib.h"

class MidiDriver_YamahaPa1:public MidiDriver_MPU401 {
public:
      MidiDriver_YamahaPa1();
      int open();
      void close();
      void send(uint32 b);

private:
      UInt8 _midiHandle;
      Boolean _isOpen;
 };

MidiDriver_YamahaPa1::MidiDriver_YamahaPa1() {
      _isOpen = false;
      _midiHandle = 0;
}

int MidiDriver_YamahaPa1::open() {
      if (!(_isOpen = Pa1Lib_midiOpen(NULL, &_midiHandle)))
            return MERR_DEVICE_NOT_AVAILABLE;

      return 0;
}

void MidiDriver_YamahaPa1::close() {
      if (_isOpen) {
            _isOpen = false;
            MidiDriver_MPU401::close();
            for (UInt8 channel = 0; channel < 16; channel++) {
                  Pa1Lib_midiControlChange(_midiHandle, channel, 120,0); // all sound off
                  Pa1Lib_midiControlChange(_midiHandle, channel, 121,0); // reset all controller
                  Pa1Lib_midiControlChange(_midiHandle, channel, 123, 0); // all notes off
            }
            Pa1Lib_midiClose(_midiHandle);
      }
}

void MidiDriver_YamahaPa1::send(uint32 b) {
      if (!_isOpen)
            return;

      UInt8 midiCmd[4];
      UInt8 chanID,mdCmd;

      midiCmd[3] = (b & 0xFF000000) >> 24;
      midiCmd[2] = (b & 0x00FF0000) >> 16;
      midiCmd[1] = (b & 0x0000FF00) >> 8;
      midiCmd[0] = (b & 0x000000FF);

      chanID = (midiCmd[0] & 0x0F) ;
      mdCmd = midiCmd[0] & 0xF0;

      switch (mdCmd) {
            case 0x80:  // note off
                  Pa1Lib_midiNoteOff(_midiHandle, chanID, midiCmd[1], 0);
                  break;

            case 0x90:  // note on
                  Pa1Lib_midiNoteOn(_midiHandle, chanID, midiCmd[1], midiCmd[2]);
                  break;

            case 0xB0:  // control change
                  Pa1Lib_midiControlChange(_midiHandle, chanID, midiCmd[1], midiCmd[2]);
                  break;

            case 0xC0:  // progam change
                  Pa1Lib_midiProgramChange(_midiHandle, chanID, midiCmd[1]);
                  break;

            case 0xE0:  // pitchBend
                  Pa1Lib_midiPitchBend(_midiHandle, chanID, (short)(midiCmd[1] | (midiCmd[2] << 8)));
                  break;
      }
}

MidiDriver *MidiDriver_YamahaPa1_create() {
      return new MidiDriver_YamahaPa1();
}

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