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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2006 The ScummVM project
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "sound/audiocd.h"
#include "sound/audiostream.h"
#include "sound/mp3.h"
#include "sound/vorbis.h"
#include "sound/flac.h"
#include "engines/engine.h"
#include "common/file.h"
#include "common/util.h"
#include "common/system.h"
DECLARE_SINGLETON(Audio::AudioCDManager);
namespace Audio {
AudioCDManager::AudioCDManager() {
_cd.playing = false;
_cd.track = 0;
_cd.start = 0;
_cd.duration = 0;
_cd.numLoops = 0;
_mixer = g_system->getMixer();
assert(_mixer);
}
void AudioCDManager::play(int track, int numLoops, int startFrame, int duration) {
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::AudioStream *stream = 0;
for (int i = 0; !stream && i < 2; ++i) {
/*
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
*/
// We multiply by 40 / 3 = 1000 / 75 to convert frames to milliseconds
stream = AudioStream::openStreamFile(trackName[i], startFrame * 40 / 3, duration * 40 / 3, (numLoops < 1) ? numLoops + 1 : numLoops);
}
// Stop any currently playing emulated track
_mixer->stopHandle(_cd.handle);
// HACK: We abuse _cd.playing to store whether we are playing a real or an emulated track.
if (stream != 0) {
_cd.playing = true;
_mixer->playInputStream(Audio::Mixer::kMusicSoundType, &_cd.handle, stream);
} else {
_cd.playing = false;
g_system->playCD(track, numLoops, startFrame, duration);
}
}
}
void AudioCDManager::stop() {
if (_cd.playing) {
// Audio CD emulation
_mixer->stopHandle(_cd.handle);
_cd.playing = false;
} else {
// Real Audio CD
g_system->stopCD();
}
}
bool AudioCDManager::isPlaying() const {
if (_cd.playing) {
// Audio CD emulation
return _mixer->isSoundHandleActive(_cd.handle);
} else {
// Real Audio CD
return g_system->pollCD();
}
}
void AudioCDManager::updateCD() {
if (_cd.playing) {
// Check whether the audio track stopped playback
if (!_mixer->isSoundHandleActive(_cd.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.
_cd.playing = false;
}
} else {
g_system->updateCD();
}
}
AudioCDManager::Status AudioCDManager::getStatus() const {
// TODO: This could be improved for "real" CD playback.
// But to do that, we would have to extend the OSystem interface.
Status info = _cd;
info.playing = isPlaying();
return info;
}
} // End of namespace Audio
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