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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/stream.h"
#include "sound/midiparser.h"
#include "touche/midi.h"
namespace Touche {
MidiPlayer::MidiPlayer(MidiDriver *driver, bool nativeMT32)
: _driver(driver), _parser(0), _midiData(0), _isLooping(false), _isPlaying(false), _masterVolume(0), _nativeMT32(nativeMT32) {
assert(_driver);
memset(_channelsTable, 0, sizeof(_channelsTable));
memset(_channelsVolume, 0, sizeof(_channelsVolume));
open();
}
MidiPlayer::~MidiPlayer() {
close();
}
void MidiPlayer::play(Common::ReadStream &stream, int size, bool loop) {
stop();
_midiData = (uint8 *)malloc(size);
if (_midiData) {
stream.read(_midiData, size);
_mutex.lock();
_parser->loadMusic(_midiData, size);
_parser->setTrack(0);
_isLooping = loop;
_isPlaying = true;
_mutex.unlock();
}
}
void MidiPlayer::stop() {
_mutex.lock();
if (_isPlaying) {
_isPlaying = false;
_parser->unloadMusic();
free(_midiData);
_midiData = 0;
}
_mutex.unlock();
}
void MidiPlayer::updateTimer() {
_mutex.lock();
if (_isPlaying) {
_parser->onTimer();
}
_mutex.unlock();
}
void MidiPlayer::adjustVolume(int diff) {
setVolume(_masterVolume + diff);
}
void MidiPlayer::setVolume(int volume) {
_masterVolume = CLIP(volume, 0, 255);
_mutex.lock();
for (int i = 0; i < NUM_CHANNELS; ++i) {
if (_channelsTable[i]) {
_channelsTable[i]->volume(_channelsVolume[i] * _masterVolume / 255);
}
}
_mutex.unlock();
}
int MidiPlayer::open() {
int ret = _driver->open();
if (ret == 0) {
_parser = MidiParser::createParser_SMF();
_parser->setMidiDriver(this);
_parser->setTimerRate(_driver->getBaseTempo());
_driver->setTimerCallback(this, &timerCallback);
}
return ret;
}
void MidiPlayer::close() {
stop();
_mutex.lock();
_driver->setTimerCallback(NULL, NULL);
_driver->close();
delete _driver;
_driver = 0;
_parser->setMidiDriver(NULL);
delete _parser;
_mutex.unlock();
}
void MidiPlayer::send(uint32 b) {
byte volume, ch = (byte)(b & 0xF);
switch (b & 0xFFF0) {
case 0x07B0: // volume change
volume = (byte)((b >> 16) & 0x7F);
_channelsVolume[ch] = volume;
volume = volume * _masterVolume / 255;
b = (b & 0xFF00FFFF) | (volume << 16);
break;
case 0x7BB0: // all notes off
if (!_channelsTable[ch]) {
// channel not yet allocated, no need to send the event
return;
}
break;
default:
if ((b & 0xF0) == 0xC0 && _nativeMT32) { // program change
b = (b & 0xFFFF00FF) | (_gmToRol[(b >> 8) & 0x7F] << 8);
}
break;
}
if (!_channelsTable[ch]) {
_channelsTable[ch] = (ch == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
}
if (_channelsTable[ch]) {
_channelsTable[ch]->send(b);
}
}
void MidiPlayer::metaEvent(byte type, byte *data, uint16 length) {
switch (type) {
case 0x2F: // end of Track
if (_isLooping) {
_parser->jumpToTick(0);
} else {
stop();
}
break;
default:
// warning("Unhandled meta event: %02x", type);
break;
}
}
void MidiPlayer::timerCallback(void *p) {
MidiPlayer *player = (MidiPlayer *)p;
player->updateTimer();
}
} // Touche namespace
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