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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001/2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#include "stdafx.h"
#include "mpu401.h"
#include "common/engine.h" // for g_system
#include "common/util.h" // for ARRAYSIZE
void MidiChannel_MPU401::init (MidiDriver_MPU401 *owner, byte channel)
{
_owner = owner;
_channel = channel;
_allocated = false;
}
void MidiChannel_MPU401::noteOff (byte note) { _owner->send(note << 8 | 0x80 | _channel); }
void MidiChannel_MPU401::noteOn (byte note, byte velocity) { _owner->send (velocity << 16 | note << 8 | 0x90 | _channel); }
void MidiChannel_MPU401::programChange (byte program) { _owner->send(program << 8 | 0xC0 | _channel); }
void MidiChannel_MPU401::pitchBend (int16 bend) { _owner->send((((bend + 0x2000) >> 7) & 0x7F) << 16 | ((bend + 0x2000) & 0x7F) << 8 | 0xE0 | _channel); }
void MidiChannel_MPU401::controlChange (byte control, byte value) { _owner->send(value << 16 | control << 8 | 0xB0 | _channel); }
void MidiChannel_MPU401::pitchBendFactor (byte value) { _owner->setPitchBendRange (_channel, value); }
void MidiChannel_MPU401::sysEx_customInstrument (uint32 type, byte *instr) { _owner->sysEx_customInstrument (_channel, type, instr); }
MidiDriver_MPU401::MidiDriver_MPU401() : MidiDriver()
{
uint i;
for (i = 0; i < ARRAYSIZE(_midi_channels); ++i) {
_midi_channels [i].init (this, i);
}
}
MidiChannel *MidiDriver_MPU401::allocateChannel()
{
MidiChannel_MPU401 *chan;
uint i;
for (i = 0; i < ARRAYSIZE(_midi_channels); ++i) {
if (i == 9) continue;
chan = &_midi_channels[i];
if (!chan->_allocated) {
chan->allocate();
return (chan);
}
}
return NULL;
}
void MidiDriver_MPU401::setTimerCallback (void *timer_param, void (*timer_proc) (void *))
{
if (!_timer_proc || !timer_proc) {
_timer_proc = (TimerCallback *) timer_proc;
_timer_param = timer_param;
if (!_started_thread && timer_proc)
g_system->create_thread (midi_driver_thread, this);
_started_thread = true;
}
}
int MidiDriver_MPU401::midi_driver_thread(void *param)
{
MidiDriver_MPU401 *mid = (MidiDriver_MPU401 *)param;
int old_time, cur_time;
old_time = g_system->get_msecs();
for (;;) {
g_system->delay_msecs(10);
cur_time = g_system->get_msecs();
while (old_time < cur_time) {
old_time += 10;
// Don't use mid->_se_on_timer()
// We must come in through IMuseMonitor to protect
// against conflicts with script access to IMuse.
if (mid->_timer_proc)
(*(mid->_timer_proc)) (mid->_timer_param);
}
}
return 0;
}
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