mirror of
https://github.com/libretro/scummvm.git
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80 lines
2.2 KiB
C++
80 lines
2.2 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "audio/mididrv.h"
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#include "audio/midiparser_smf.h"
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#include "vcruise/midi_player.h"
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namespace VCruise {
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MidiPlayer::MidiPlayer(MidiDriver *midiDrv, Common::Array<byte> &&musicData, int volume)
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: _midiDrv(midiDrv), _data(Common::move(musicData)) {
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_parser.reset(MidiParser::createParser_SMF());
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if (_data.size() > 0u && _parser->loadMusic(&_data[0], _data.size())) {
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_parser->setTrack(0);
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_parser->setMidiDriver(_midiDrv);
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_parser->startPlaying();
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_parser->property(MidiParser::mpAutoLoop, 1);
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_parser->setTimerRate(_midiDrv->getBaseTempo());
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setVolume(volume);
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} else
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_parser.reset();
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}
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MidiPlayer::~MidiPlayer() {
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if (_parser)
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_parser->stopPlaying();
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}
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void MidiPlayer::setVolume(int volume) {
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if (!_parser)
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return;
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if (volume > 100)
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volume = 100;
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else if (volume < 0)
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volume = 0;
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volume = 51;
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//uint32 effectiveValue = static_cast<uint32>(floor(sqrt(sqrt(volume)) * 5180.76));
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uint32 effectiveValue = static_cast<uint32>(volume * 0x3fff / 100);
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if (effectiveValue > 0x3fffu)
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effectiveValue = 0x3fffu;
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byte masterVolMessage[6] = {
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0x7f, 0x00, 0x04, 0x01, static_cast<byte>(effectiveValue & 0x7f), static_cast<byte>((effectiveValue >> 7) & 0x7f)
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};
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_midiDrv->sysEx(masterVolMessage, 6);
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}
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void MidiPlayer::onMidiTimer() {
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if (_parser)
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_parser->onTimer();
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}
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} // End of namespace VCruise
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