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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001-2003 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;
}
MidiDriver *MidiChannel_MPU401::device() {
return _owner;
}
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);
}
const char *MidiDriver::getErrorName(int error_code) {
static const char *const midi_errors[] = {
"No error",
"Cannot connect",
"Streaming not available",
"Device not available",
"Driver already open"
};
if ((uint) error_code >= ARRAYSIZE(midi_errors))
return "Unknown Error";
return midi_errors[error_code];
}
MidiDriver_MPU401::MidiDriver_MPU401() :
MidiDriver(),
_started_thread (false),
_mutex (0),
_timer_proc (0),
_timer_param (0)
{
uint i;
for (i = 0; i < ARRAYSIZE(_midi_channels); ++i) {
_midi_channels [i].init (this, i);
}
}
void MidiDriver_MPU401::close() {
if (_mutex) {
_started_thread = false;
g_system->lock_mutex (_mutex); // Wait for the timer thread to shutdown.
g_system->unlock_mutex (_mutex);
g_system->delete_mutex (_mutex);
}
}
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, TimerCallback timer_proc) {
if (!_timer_proc || !timer_proc) {
_timer_proc = timer_proc;
_timer_param = timer_param;
if (!_started_thread && timer_proc) {
// TODO: This is the only place in ScummVM where create_thread is
// being used. And it's used for a timer like thread. So if we
// could convert it to use the timer API instead, we could get
// rid of create_thread completely.
_mutex = g_system->create_mutex();
_started_thread = true;
g_system->create_thread(midi_driver_thread, this);
}
}
}
#if !defined(__MORPHOS__) && !defined(__PALM_OS__)
int MidiDriver_MPU401::midi_driver_thread(void *param) {
MidiDriver_MPU401 *mid = (MidiDriver_MPU401 *)param;
int old_time, cur_time;
// Grab the MidiDriver's mutex. When the MidiDriver
// shuts down, it will wait on that mutex until we've
// detected the shutdown and quit looping.
g_system->lock_mutex (mid->_mutex);
old_time = g_system->get_msecs();
while (mid->_started_thread) {
g_system->delay_msecs(10);
cur_time = g_system->get_msecs();
while (old_time < cur_time) {
old_time += 10;
if (mid->_timer_proc)
(*(mid->_timer_proc)) (mid->_timer_param);
}
}
g_system->unlock_mutex (mid->_mutex);
return 0;
}
#endif
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