mirror of
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153 lines
4.1 KiB
C++
153 lines
4.1 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001-2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#include "stdafx.h"
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#include "mpu401.h"
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#include "common/engine.h" // for g_system
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#include "common/util.h" // for ARRAYSIZE
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void MidiChannel_MPU401::init(MidiDriver_MPU401 *owner, byte channel) {
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_owner = owner;
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_channel = channel;
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_allocated = false;
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}
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MidiDriver *MidiChannel_MPU401::device() {
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return _owner;
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}
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void MidiChannel_MPU401::noteOff (byte note) {
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_owner->send(note << 8 | 0x80 | _channel);
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}
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void MidiChannel_MPU401::noteOn(byte note, byte velocity) {
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_owner->send (velocity << 16 | note << 8 | 0x90 | _channel);
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}
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void MidiChannel_MPU401::programChange(byte program) {
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_owner->send(program << 8 | 0xC0 | _channel);
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}
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void MidiChannel_MPU401::pitchBend(int16 bend) {
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_owner->send((((bend + 0x2000) >> 7) & 0x7F) << 16 | ((bend + 0x2000) & 0x7F) << 8 | 0xE0 | _channel);
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}
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void MidiChannel_MPU401::controlChange(byte control, byte value) {
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_owner->send(value << 16 | control << 8 | 0xB0 | _channel);
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}
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void MidiChannel_MPU401::pitchBendFactor(byte value) {
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_owner->setPitchBendRange (_channel, value);
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}
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void MidiChannel_MPU401::sysEx_customInstrument(uint32 type, byte *instr) {
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_owner->sysEx_customInstrument (_channel, type, instr);
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}
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const char *MidiDriver::getErrorName(int error_code) {
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static const char *const midi_errors[] = {
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"No error",
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"Cannot connect",
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"Streaming not available",
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"Device not available",
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"Driver already open"
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};
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if ((uint) error_code >= ARRAYSIZE(midi_errors))
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return "Unknown Error";
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return midi_errors[error_code];
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}
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MidiDriver_MPU401::MidiDriver_MPU401() : MidiDriver() {
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uint i;
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_started_thread = false; // palmos
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_timer_proc = NULL; // palmos
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_timer_param = NULL; // palmos
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for (i = 0; i < ARRAYSIZE(_midi_channels); ++i) {
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_midi_channels [i].init (this, i);
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}
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}
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void MidiDriver_MPU401::sysEx_customInstrument (byte channel, uint32 type, byte *instr) {
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if (type != 'ROL ')
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return;
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// The SysEx stream for a Roland MT-32 instrument definition starts with
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// the Roland manufacturer ID. So we just need to substitute the appropriate
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// device # (i.e. channel), and go.
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instr[1] = channel;
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sysEx (instr, 253);
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}
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MidiChannel *MidiDriver_MPU401::allocateChannel() {
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MidiChannel_MPU401 *chan;
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uint i;
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for (i = 0; i < ARRAYSIZE(_midi_channels); ++i) {
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if (i == 9)
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continue;
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chan = &_midi_channels[i];
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if (!chan->_allocated) {
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chan->allocate();
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return (chan);
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}
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}
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return NULL;
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}
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void MidiDriver_MPU401::setTimerCallback (void *timer_param, void (*timer_proc) (void *)) {
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if (!_timer_proc || !timer_proc) {
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_timer_proc = (TimerCallback *) timer_proc;
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_timer_param = timer_param;
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if (!_started_thread && timer_proc)
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g_system->create_thread(midi_driver_thread, this);
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_started_thread = true;
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}
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}
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#if !defined(__MORPHOS__) && !defined(__PALM_OS__)
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int MidiDriver_MPU401::midi_driver_thread(void *param) {
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volatile MidiDriver_MPU401 *mid = (MidiDriver_MPU401 *)param;
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int old_time, cur_time;
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old_time = g_system->get_msecs();
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for (;;) {
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g_system->delay_msecs(10);
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cur_time = g_system->get_msecs();
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while (old_time < cur_time) {
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old_time += 10;
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// Don't use mid->_se_on_timer()
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// We must come in through IMuseMonitor to protect
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// against conflicts with script access to IMuse.
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if (mid->_timer_proc)
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(*(mid->_timer_proc)) (mid->_timer_param);
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}
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}
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return 0;
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}
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#endif
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