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Diffstat (limited to 'backends/audiocd/default/default-audiocd.cpp')
| -rw-r--r-- | backends/audiocd/default/default-audiocd.cpp | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/backends/audiocd/default/default-audiocd.cpp b/backends/audiocd/default/default-audiocd.cpp new file mode 100644 index 0000000000..56e737d359 --- /dev/null +++ b/backends/audiocd/default/default-audiocd.cpp @@ -0,0 +1,157 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#include "backends/audiocd/default/default-audiocd.h" +#include "sound/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; +} |