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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: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/engines/made/music.cpp $
* $Id: music.cpp 35843 2009-01-13 10:11:52Z thebluegr $
*
*/
// MIDI and digital music class
#include "sound/audiostream.h"
#include "sound/mididrv.h"
#include "sound/midiparser.h"
#include "common/config-manager.h"
#include "common/file.h"
#include "draci/draci.h"
#include "draci/music.h"
namespace Draci {
MusicPlayer::MusicPlayer(MidiDriver *driver, const char *pathMask) : _parser(0), _driver(driver), _pathMask(pathMask), _looping(false), _isPlaying(false), _passThrough(false), _isGM(false), _track(0) {
memset(_channel, 0, sizeof(_channel));
memset(_channelVolume, 255, sizeof(_channelVolume));
_masterVolume = 0;
this->open();
_smfParser = MidiParser::createParser_SMF();
_midiMusicData = NULL;
// TODO: Load cmf.ins with the instrument table. It seems that an
// interface for such an operation is supported for Adlib. Maybe for
// this card, setting instruments is necessary.
}
MusicPlayer::~MusicPlayer() {
_driver->setTimerCallback(NULL, NULL);
stop();
this->close();
_smfParser->setMidiDriver(NULL);
delete _smfParser;
delete _midiMusicData;
}
void MusicPlayer::setChannelVolume(int channel) {
int newVolume = _channelVolume[channel] * _masterVolume / 255;
debugC(3, kDraciSoundDebugLevel, "Music channel %d: volume %d->%d",
channel, _channelVolume[channel], newVolume);
_channel[channel]->volume(newVolume);
}
void MusicPlayer::setVolume(int volume) {
Common::StackLock lock(_mutex);
volume = CLIP(volume, 0, 255);
if (_masterVolume == volume)
return;
_masterVolume = volume;
for (int i = 0; i < 16; ++i) {
if (_channel[i]) {
setChannelVolume(i);
}
}
}
int MusicPlayer::open() {
// Don't ever call open without first setting the output driver!
if (!_driver)
return 255;
int ret = _driver->open();
if (ret)
return ret;
_driver->setTimerCallback(this, &onTimer);
return 0;
}
void MusicPlayer::close() {
stop();
if (_driver)
_driver->close();
_driver = 0;
}
void MusicPlayer::send(uint32 b) {
if (_passThrough) {
_driver->send(b);
return;
}
byte channel = (byte)(b & 0x0F);
if ((b & 0xFFF0) == 0x07B0) {
// Adjust volume changes by master volume
byte volume = (byte)((b >> 16) & 0x7F);
_channelVolume[channel] = volume;
volume = volume * _masterVolume / 255;
b = (b & 0xFF00FFFF) | (volume << 16);
} else if ((b & 0xF0) == 0xC0 && !_isGM && !_nativeMT32) {
b = (b & 0xFFFF00FF) | MidiDriver::_mt32ToGm[(b >> 8) & 0xFF] << 8;
}
else if ((b & 0xFFF0) == 0x007BB0) {
//Only respond to All Notes Off if this channel
//has currently been allocated
if (_channel[b & 0x0F])
return;
}
if (!_channel[channel]) {
_channel[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
setChannelVolume(channel);
}
if (_channel[channel])
_channel[channel]->send(b);
}
void MusicPlayer::metaEvent(byte type, byte *data, uint16 length) {
switch (type) {
case 0x2F: // End of Track
if (_looping)
_parser->jumpToTick(0);
else
stop();
break;
default:
//warning("Unhandled meta event: %02x", type);
break;
}
}
void MusicPlayer::onTimer(void *refCon) {
MusicPlayer *music = (MusicPlayer *)refCon;
Common::StackLock lock(music->_mutex);
if (music->_parser)
music->_parser->onTimer();
}
void MusicPlayer::playSMF(int track, bool loop) {
if (_isPlaying && track == _track) {
debugC(2, kDraciSoundDebugLevel, "Already plaing track %d", track);
return;
}
stop();
_isGM = true;
// Load MIDI resource data
Common::File musicFile;
char musicFileName[40];
sprintf(musicFileName, _pathMask.c_str(), track);
musicFile.open(musicFileName);
if (!musicFile.isOpen()) {
debugC(2, kDraciSoundDebugLevel, "Cannot open track %d", track);
return;
}
int midiMusicSize = musicFile.size();
delete _midiMusicData;
_midiMusicData = new byte[midiMusicSize];
musicFile.read(_midiMusicData, midiMusicSize);
musicFile.close();
if (_smfParser->loadMusic(_midiMusicData, midiMusicSize)) {
MidiParser *parser = _smfParser;
parser->setTrack(0);
parser->setMidiDriver(this);
parser->setTimerRate(getBaseTempo());
parser->property(MidiParser::mpCenterPitchWheelOnUnload, 1);
_parser = parser;
syncVolume();
_looping = loop;
_isPlaying = true;
_track = track;
debugC(2, kDraciSoundDebugLevel, "Playing track %d", track);
} else {
debugC(2, kDraciSoundDebugLevel, "Cannot play track %d", track);
}
}
void MusicPlayer::stop() {
Common::StackLock lock(_mutex);
if (!_isPlaying)
return;
debugC(2, kDraciSoundDebugLevel, "Stopping track %d", _track);
_track = 0;
_isPlaying = false;
if (_parser) {
_parser->unloadMusic();
_parser = NULL;
}
}
void MusicPlayer::pause() {
debugC(2, kDraciSoundDebugLevel, "Pausing track %d", _track);
setVolume(-1);
_isPlaying = false;
}
void MusicPlayer::resume() {
debugC(2, kDraciSoundDebugLevel, "Resuming track %d", _track);
syncVolume();
_isPlaying = true;
}
void MusicPlayer::syncVolume() {
int volume = ConfMan.getInt("music_volume");
debugC(2, kDraciSoundDebugLevel, "Syncing music volume to %d", volume);
setVolume(volume);
// TODO: doesn't work in the beginning when no music is playing yet.
// It goes through all active channels (= none) and stops. Only after
// actual instruments have played in the channels, this has an effect.
// As a consequence, music is very loud in the beginning until Ctrl-F5
// is pressed for the first time.
}
} // End of namespace Draci
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