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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* 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.
*
* $URL$
* $Id$
*/
/*
* Raw output support by Michael Pearce
* Alsa support by Nicolas Noble <nicolas@nobis-crew.org> copied from
* both the QuickTime support and (vkeybd http://www.alsa-project.org/~iwai/alsa.html)
*/
#if defined(UNIX) && !defined(__BEOS__) && !defined(__MAEMO__)
#include "common/stdafx.h"
#include "sound/mpu401.h"
#include "common/util.h"
////////////////////////////////////////
//
// Unix dev/sequencer driver
//
////////////////////////////////////////
#define SEQ_MIDIPUTC 5
class MidiDriver_SEQ : public MidiDriver_MPU401 {
public:
MidiDriver_SEQ();
int open();
void close();
void send(uint32 b);
void sysEx(const byte *msg, uint16 length);
private:
bool _isOpen;
int device, _device_num;
};
MidiDriver_SEQ::MidiDriver_SEQ() {
_isOpen = false;
device = 0;
_device_num = 0;
}
int MidiDriver_SEQ::open() {
char *device_name;
char dev_seq[] = "/dev/sequencer";
if (_isOpen)
return MERR_ALREADY_OPEN;
_isOpen = true;
device = 0;
device_name = getenv("SCUMMVM_MIDI");
if (device_name == NULL) {
warning("SCUMMVM_MIDI environment variable not set, using /dev/sequencer");
device_name = dev_seq;
}
device = (::open((device_name), O_RDWR, 0));
if ((device_name == NULL) || (device < 0)) {
if (device_name == NULL)
warning("Opening /dev/null (no music will be heard) ");
else
warning("Cannot open rawmidi device %s - using /dev/null (no music will be heard) ",
device_name);
device = (::open(("/dev/null"), O_RDWR, 0));
if (device < 0)
error("Cannot open /dev/null to dump midi output");
}
if (getenv("SCUMMVM_MIDIPORT"))
_device_num = atoi(getenv("SCUMMVM_MIDIPORT"));
return 0;
}
void MidiDriver_SEQ::close() {
MidiDriver_MPU401::close();
::close(device);
_isOpen = false;
}
void MidiDriver_SEQ::send(uint32 b) {
unsigned char buf[256];
int position = 0;
switch (b & 0xF0) {
case 0x80:
case 0x90:
case 0xA0:
case 0xB0:
case 0xE0:
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = (unsigned char)b;
buf[position++] = _device_num;
buf[position++] = 0;
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = (unsigned char)((b >> 8) & 0x7F);
buf[position++] = _device_num;
buf[position++] = 0;
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = (unsigned char)((b >> 16) & 0x7F);
buf[position++] = _device_num;
buf[position++] = 0;
break;
case 0xC0:
case 0xD0:
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = (unsigned char)b;
buf[position++] = _device_num;
buf[position++] = 0;
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = (unsigned char)((b >> 8) & 0x7F);
buf[position++] = _device_num;
buf[position++] = 0;
break;
default:
fprintf(stderr, "Unknown : %08x\n", (int)b);
break;
}
write(device, buf, position);
}
void MidiDriver_SEQ::sysEx (const byte *msg, uint16 length) {
if (length > 254) {
warning ("Cannot send SysEx block - data too large");
return;
}
unsigned char buf [1024];
int position = 0;
const byte *chr = msg;
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = 0xF0;
buf[position++] = _device_num;
buf[position++] = 0;
for (; length; --length, ++chr) {
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = (unsigned char) *chr & 0x7F;
buf[position++] = _device_num;
buf[position++] = 0;
}
buf[position++] = SEQ_MIDIPUTC;
buf[position++] = 0xF7;
buf[position++] = _device_num;
buf[position++] = 0;
write (device, buf, position);
}
MidiDriver *MidiDriver_SEQ_create() {
return new MidiDriver_SEQ();
}
#endif
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