mirror of
https://github.com/libretro/scummvm.git
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99 lines
2.9 KiB
C++
99 lines
2.9 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 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 "common/endian.h"
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#include "common/textconsole.h"
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#include "sky/music/adlibmusic.h"
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#include "sky/music/adlibchannel.h"
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#include "audio/fmopl.h"
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#include "sky/sky.h"
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namespace Audio {
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class Mixer;
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}
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namespace Sky {
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AdLibMusic::AdLibMusic(Audio::Mixer *pMixer, Disk *pDisk) : MusicBase(pMixer, pDisk) {
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_driverFileBase = 60202;
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_opl = OPL::Config::create();
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if (!_opl || !_opl->init())
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error("Failed to create OPL");
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_opl->start(new Common::Functor0Mem<void, AdLibMusic>(this, &AdLibMusic::onTimer), 50);
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}
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AdLibMusic::~AdLibMusic() {
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delete _opl;
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}
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void AdLibMusic::onTimer() {
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if (_musicData != NULL)
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pollMusic();
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}
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void AdLibMusic::setupPointers() {
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if (SkyEngine::_systemVars->gameVersion == 109) {
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// disk demo uses a different AdLib driver version, some offsets have changed
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//_musicDataLoc = (_musicData[0x11CC] << 8) | _musicData[0x11CB];
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//_initSequence = _musicData + 0xEC8;
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_musicDataLoc = READ_LE_UINT16(_musicData + 0x1200);
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_initSequence = _musicData + 0xEFB;
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} else if (SkyEngine::_systemVars->gameVersion == 267) {
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_musicDataLoc = READ_LE_UINT16(_musicData + 0x11F7);
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_initSequence = _musicData + 0xE87;
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} else {
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_musicDataLoc = READ_LE_UINT16(_musicData + 0x1201);
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_initSequence = _musicData + 0xE91;
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}
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}
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void AdLibMusic::setupChannels(uint8 *channelData) {
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_numberOfChannels = channelData[0];
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channelData++;
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for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) {
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uint16 chDataStart = READ_LE_UINT16((uint16 *)channelData + cnt) + _musicDataLoc;
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_channels[cnt] = new AdLibChannel(_opl, _musicData, chDataStart);
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// also set proper volume - Fixes bug where intro music plays at full volume
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_channels[cnt]->updateVolume(_musicVolume);
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}
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}
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void AdLibMusic::startDriver() {
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uint16 cnt = 0;
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while (_initSequence[cnt] || _initSequence[cnt + 1]) {
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_opl->writeReg(_initSequence[cnt], _initSequence[cnt + 1]);
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cnt += 2;
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}
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}
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void AdLibMusic::setVolume(uint16 param) {
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_musicVolume = param;
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for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++)
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_channels[cnt]->updateVolume(_musicVolume);
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}
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} // End of namespace Sky
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