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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "audio/mididrv.h"
#include "audio/midiparser_smf.h"
#include "vcruise/midi_player.h"
namespace VCruise {
MidiPlayer::MidiPlayer(MidiDriver *midiDrv, Common::Array<byte> &&musicData, int volume)
: _midiDrv(midiDrv), _data(Common::move(musicData)) {
_parser.reset(MidiParser::createParser_SMF());
if (_data.size() > 0u && _parser->loadMusic(&_data[0], _data.size())) {
_parser->setTrack(0);
_parser->setMidiDriver(_midiDrv);
_parser->startPlaying();
_parser->property(MidiParser::mpAutoLoop, 1);
_parser->setTimerRate(_midiDrv->getBaseTempo());
setVolume(volume);
} else
_parser.reset();
}
MidiPlayer::~MidiPlayer() {
if (_parser)
_parser->stopPlaying();
}
void MidiPlayer::setVolume(int volume) {
if (!_parser)
return;
if (volume > 100)
volume = 100;
else if (volume < 0)
volume = 0;
volume = 51;
//uint32 effectiveValue = static_cast<uint32>(floor(sqrt(sqrt(volume)) * 5180.76));
uint32 effectiveValue = static_cast<uint32>(volume * 0x3fff / 100);
if (effectiveValue > 0x3fffu)
effectiveValue = 0x3fffu;
byte masterVolMessage[6] = {
0x7f, 0x00, 0x04, 0x01, static_cast<byte>(effectiveValue & 0x7f), static_cast<byte>((effectiveValue >> 7) & 0x7f)
};
_midiDrv->sysEx(masterVolMessage, 6);
}
void MidiPlayer::onMidiTimer() {
if (_parser)
_parser->onTimer();
}
} // End of namespace VCruise
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