mirror of
https://github.com/libretro/scummvm.git
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153 lines
3.9 KiB
C++
153 lines
3.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "audio/mpu401.h"
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#include "common/system.h"
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#include "common/timer.h"
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#include "common/util.h" // for ARRAYSIZE
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void MidiChannel_MPU401::init(MidiDriver *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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bool MidiChannel_MPU401::allocate() {
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if (_allocated)
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return false;
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_allocated = true;
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return true;
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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::send(uint32 b) {
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_owner->send((b & 0xFFFFFFF0) | (_channel & 0xF));
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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, const 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() :
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MidiDriver(),
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_timer_proc(0),
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_channel_mask(0xFFFF) // Permit all 16 channels by default
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{
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uint i;
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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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MidiDriver_MPU401::~MidiDriver_MPU401() {
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}
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void MidiDriver_MPU401::close() {
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if (_timer_proc) {
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g_system->getTimerManager()->removeTimerProc(_timer_proc);
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_timer_proc = 0;
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}
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if (isOpen()) {
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for (int i = 0; i < 16; ++i)
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send(0x7B << 8 | 0xB0 | i);
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}
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}
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uint32 MidiDriver_MPU401::property(int prop, uint32 param) {
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switch (prop) {
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case PROP_CHANNEL_MASK:
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_channel_mask = param & 0xFFFF;
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return 1;
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}
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return 0;
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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 || !(_channel_mask & (1 << i)))
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continue;
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chan = &_midi_channels[i];
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if (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, Common::TimerManager::TimerProc timer_proc) {
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if (!_timer_proc || !timer_proc) {
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if (_timer_proc)
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g_system->getTimerManager()->removeTimerProc(_timer_proc);
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_timer_proc = timer_proc;
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if (timer_proc)
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g_system->getTimerManager()->installTimerProc(timer_proc, 10000, timer_param, "MPU401");
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}
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}
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