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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.
*
*/
#include "backends/audiocd/default/default-audiocd.h"
#include "audio/audiostream.h"
#include "common/system.h"
DefaultAudioCDManager::DefaultAudioCDManager() {
_cd.playing = false;
_cd.track = 0;
_cd.start = 0;
_cd.duration = 0;
_cd.numLoops = 0;
_cd.volume = Audio::Mixer::kMaxChannelVolume;
_cd.balance = 0;
_mixer = g_system->getMixer();
_emulating = false;
assert(_mixer);
}
void DefaultAudioCDManager::play(int track, int numLoops, int startFrame, int duration, bool only_emulate) {
if (numLoops != 0 || startFrame != 0) {
_cd.track = track;
_cd.numLoops = numLoops;
_cd.start = startFrame;
_cd.duration = duration;
// Try to load the track from a compressed data file, and if found, use
// that. If not found, attempt to start regular Audio CD playback of
// the requested track.
char trackName[2][16];
sprintf(trackName[0], "track%d", track);
sprintf(trackName[1], "track%02d", track);
Audio::SeekableAudioStream *stream = 0;
for (int i = 0; !stream && i < 2; ++i)
stream = Audio::SeekableAudioStream::openStreamFile(trackName[i]);
// Stop any currently playing emulated track
_mixer->stopHandle(_handle);
if (stream != 0) {
Audio::Timestamp start = Audio::Timestamp(0, startFrame, 75);
Audio::Timestamp end = duration ? Audio::Timestamp(0, startFrame + duration, 75) : stream->getLength();
/*
FIXME: Seems numLoops == 0 and numLoops == 1 both indicate a single repetition,
while all other positive numbers indicate precisely the number of desired
repetitions. Finally, -1 means infinitely many
*/
_emulating = true;
_mixer->playStream(Audio::Mixer::kMusicSoundType, &_handle,
Audio::makeLoopingAudioStream(stream, start, end, (numLoops < 1) ? numLoops + 1 : numLoops), -1, _cd.volume, _cd.balance);
} else {
_emulating = false;
if (!only_emulate)
playCD(track, numLoops, startFrame, duration);
}
}
}
void DefaultAudioCDManager::stop() {
if (_emulating) {
// Audio CD emulation
_mixer->stopHandle(_handle);
_emulating = false;
} else {
// Real Audio CD
stopCD();
}
}
bool DefaultAudioCDManager::isPlaying() const {
if (_emulating) {
// Audio CD emulation
return _mixer->isSoundHandleActive(_handle);
} else {
// Real Audio CD
return pollCD();
}
}
void DefaultAudioCDManager::setVolume(byte volume) {
_cd.volume = volume;
if (_emulating) {
// Audio CD emulation
if (_mixer->isSoundHandleActive(_handle))
_mixer->setChannelVolume(_handle, _cd.volume);
} else {
// Real Audio CD
// Unfortunately I can't implement this atm
// since SDL doesn't seem to offer an interface method for this.
// g_system->setVolumeCD(_cd.volume);
}
}
void DefaultAudioCDManager::setBalance(int8 balance) {
_cd.balance = balance;
if (_emulating) {
// Audio CD emulation
if (isPlaying())
_mixer->setChannelBalance(_handle, _cd.balance);
} else {
// Real Audio CD
// Unfortunately I can't implement this atm
// since SDL doesn't seem to offer an interface method for this.
// g_system->setBalanceCD(_cd.balance);
}
}
void DefaultAudioCDManager::update() {
if (_emulating) {
// Check whether the audio track stopped playback
if (!_mixer->isSoundHandleActive(_handle)) {
// FIXME: We do not update the numLoops parameter here (and in fact,
// currently can't do that). Luckily, only one engine ever checks
// this part of the AudioCD status, namely the SCUMM engine; and it
// only checks whether the track is currently set to infinite looping
// or not.
_emulating = false;
}
} else {
updateCD();
}
}
DefaultAudioCDManager::Status DefaultAudioCDManager::getStatus() const {
Status info = _cd;
info.playing = isPlaying();
return info;
}
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