diff options
Diffstat (limited to 'backends/audiocd')
-rw-r--r-- | backends/audiocd/audiocd.h | 148 | ||||
-rw-r--r-- | backends/audiocd/default/default-audiocd.cpp | 157 | ||||
-rw-r--r-- | backends/audiocd/default/default-audiocd.h | 62 | ||||
-rw-r--r-- | backends/audiocd/sdl/sdl-audiocd.cpp | 139 | ||||
-rw-r--r-- | backends/audiocd/sdl/sdl-audiocd.h | 57 |
5 files changed, 563 insertions, 0 deletions
diff --git a/backends/audiocd/audiocd.h b/backends/audiocd/audiocd.h new file mode 100644 index 0000000000..f218db7f72 --- /dev/null +++ b/backends/audiocd/audiocd.h @@ -0,0 +1,148 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef BACKENDS_AUDIOCD_ABSTRACT_H +#define BACKENDS_AUDIOCD_ABSTRACT_H + +#include "common/scummsys.h" +#include "common/noncopyable.h" + +/** +* Abstract Audio CD manager class. Subclasses implement the actual +* functionality. +*/ +class AudioCDManager : Common::NonCopyable { +public: + virtual ~AudioCDManager() {} + + /** + * A structure containing the current playback information + */ + struct Status { + bool playing; + int track; + int start; + int duration; + int numLoops; + int volume; + int balance; + }; + + /** + * @name Emulated playback functions + * Engines should call these functions. Not all platforms + * support cd playback, and these functions should try to + * emulate it. + */ + //@{ + + /** + * Start audio CD playback + * @param track the track to play. + * @param num_loops how often playback should be repeated (-1 = infinitely often). + * @param start_frame the frame at which playback should start (75 frames = 1 second). + * @param duration the number of frames to play. + * @param only_emulate determines if the track should be emulated only + */ + virtual void play(int track, int numLoops, int startFrame, int duration, bool only_emulate = false) = 0; + + /** + * Get if audio is being played. + * @return true if CD or emulated audio is playing + */ + virtual bool isPlaying() const = 0; + + /** + * Set the audio volume + */ + virtual void setVolume(byte volume) = 0; + + /** + * Set the speakers balance + */ + virtual void setBalance(int8 balance) = 0; + + /** + * Stop CD or emulated audio playback. + */ + virtual void stop() = 0; + + /** + * Update CD or emulated audio status. + */ + virtual void update() = 0; + + /** + * Get the playback status. + * @return a Status struct with playback data. + */ + virtual Status getStatus() const = 0; + + //@} + + + /** + * @name Real CD audio methods + * These functions should be called from the emulated + * ones if they can't emulate the audio playback. + */ + //@{ + + /** + * Initialise the specified CD drive for audio playback. + * @param drive the drive id + * @return true if the CD drive was inited succesfully + */ + virtual bool openCD(int drive) = 0; + + /** + * Poll CD status. + * @return true if CD audio is playing + */ + virtual bool pollCD() const = 0; + + /** + * Start CD audio playback. + * @param track the track to play. + * @param num_loops how often playback should be repeated (-1 = infinitely often). + * @param start_frame the frame at which playback should start (75 frames = 1 second). + * @param duration the number of frames to play. + */ + virtual void playCD(int track, int num_loops, int start_frame, int duration) = 0; + + /** + * Stop CD audio playback. + */ + virtual void stopCD() = 0; + + /** + * Update CD audio status. + */ + virtual void updateCD() = 0; + + //@} +}; + +#endif diff --git a/backends/audiocd/default/default-audiocd.cpp b/backends/audiocd/default/default-audiocd.cpp new file mode 100644 index 0000000000..6d16b26652 --- /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; +} diff --git a/backends/audiocd/default/default-audiocd.h b/backends/audiocd/default/default-audiocd.h new file mode 100644 index 0000000000..3f9df0bbbb --- /dev/null +++ b/backends/audiocd/default/default-audiocd.h @@ -0,0 +1,62 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef BACKENDS_AUDIOCD_DEFAULT_H +#define BACKENDS_AUDIOCD_DEFAULT_H + +#include "backends/audiocd/audiocd.h" +#include "sound/mixer.h" + +/** + * The default audio cd manager. Implements emulation of audio cd playback. + */ +class DefaultAudioCDManager : public AudioCDManager { +public: + DefaultAudioCDManager(); + virtual ~DefaultAudioCDManager() {} + + void play(int track, int numLoops, int startFrame, int duration, bool only_emulate = false); + void stop(); + bool isPlaying() const; + void setVolume(byte volume); + void setBalance(int8 balance); + void update(); + virtual Status getStatus() const; // Subclasses should override for better status results + + virtual bool openCD(int drive) { return false; } + virtual void updateCD() {} + virtual bool pollCD() const { return false; } + virtual void playCD(int track, int num_loops, int start_frame, int duration) {} + virtual void stopCD() {} + +protected: + Audio::SoundHandle _handle; + bool _emulating; + + Status _cd; + Audio::Mixer *_mixer; +}; + +#endif diff --git a/backends/audiocd/sdl/sdl-audiocd.cpp b/backends/audiocd/sdl/sdl-audiocd.cpp new file mode 100644 index 0000000000..62ab333f54 --- /dev/null +++ b/backends/audiocd/sdl/sdl-audiocd.cpp @@ -0,0 +1,139 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#if defined(SDL_BACKEND) + +// Disable symbol overrides so that we can use system headers. +#define FORBIDDEN_SYMBOL_ALLOW_ALL + +#include "backends/audiocd/sdl/sdl-audiocd.h" + +SdlAudioCDManager::SdlAudioCDManager() + : + _cdrom(0), + _cdTrack(0), + _cdNumLoops(0), + _cdStartFrame(0), + _cdDuration(0), + _cdEndTime(0), + _cdStopTime(0) { + +} + +SdlAudioCDManager::~SdlAudioCDManager() { + if (_cdrom) { + SDL_CDStop(_cdrom); + SDL_CDClose(_cdrom); + } +} + +bool SdlAudioCDManager::openCD(int drive) { + if (SDL_InitSubSystem(SDL_INIT_CDROM) == -1) + _cdrom = NULL; + else { + _cdrom = SDL_CDOpen(drive); + // Did it open? Check if _cdrom is NULL + if (!_cdrom) { + warning("Couldn't open drive: %s", SDL_GetError()); + } else { + _cdNumLoops = 0; + _cdStopTime = 0; + _cdEndTime = 0; + } + } + + return (_cdrom != NULL); +} + +void SdlAudioCDManager::stopCD() { + // Stop CD Audio in 1/10th of a second + _cdStopTime = SDL_GetTicks() + 100; + _cdNumLoops = 0; +} + +void SdlAudioCDManager::playCD(int track, int num_loops, int start_frame, int duration) { + if (!num_loops && !start_frame) + return; + + if (!_cdrom) + return; + + if (duration > 0) + duration += 5; + + _cdTrack = track; + _cdNumLoops = num_loops; + _cdStartFrame = start_frame; + + SDL_CDStatus(_cdrom); + if (start_frame == 0 && duration == 0) + SDL_CDPlayTracks(_cdrom, track, 0, 1, 0); + else + SDL_CDPlayTracks(_cdrom, track, start_frame, 0, duration); + _cdDuration = duration; + _cdStopTime = 0; + _cdEndTime = SDL_GetTicks() + _cdrom->track[track].length * 1000 / CD_FPS; +} + +bool SdlAudioCDManager::pollCD() const { + if (!_cdrom) + return false; + + return (_cdNumLoops != 0 && (SDL_GetTicks() < _cdEndTime || SDL_CDStatus(_cdrom) == CD_PLAYING)); +} + +void SdlAudioCDManager::updateCD() { + if (!_cdrom) + return; + + if (_cdStopTime != 0 && SDL_GetTicks() >= _cdStopTime) { + SDL_CDStop(_cdrom); + _cdNumLoops = 0; + _cdStopTime = 0; + return; + } + + if (_cdNumLoops == 0 || SDL_GetTicks() < _cdEndTime) + return; + + if (_cdNumLoops != 1 && SDL_CDStatus(_cdrom) != CD_STOPPED) { + // Wait another second for it to be done + _cdEndTime += 1000; + return; + } + + if (_cdNumLoops > 0) + _cdNumLoops--; + + if (_cdNumLoops != 0) { + if (_cdStartFrame == 0 && _cdDuration == 0) + SDL_CDPlayTracks(_cdrom, _cdTrack, 0, 1, 0); + else + SDL_CDPlayTracks(_cdrom, _cdTrack, _cdStartFrame, 0, _cdDuration); + _cdEndTime = SDL_GetTicks() + _cdrom->track[_cdTrack].length * 1000 / CD_FPS; + } +} + +#endif diff --git a/backends/audiocd/sdl/sdl-audiocd.h b/backends/audiocd/sdl/sdl-audiocd.h new file mode 100644 index 0000000000..42ac980c51 --- /dev/null +++ b/backends/audiocd/sdl/sdl-audiocd.h @@ -0,0 +1,57 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef BACKENDS_AUDIOCD_SDL_H +#define BACKENDS_AUDIOCD_SDL_H + +#include "backends/audiocd/default/default-audiocd.h" + +#if defined(__SYMBIAN32__) +#include <esdl\SDL.h> +#else +#include <SDL.h> +#endif + +/** + * The SDL audio cd manager. Implements real audio cd playback. + */ +class SdlAudioCDManager : public DefaultAudioCDManager { +public: + SdlAudioCDManager(); + virtual ~SdlAudioCDManager(); + +protected: + virtual bool openCD(int drive); + virtual void updateCD(); + virtual bool pollCD() const; + virtual void playCD(int track, int num_loops, int start_frame, int duration); + virtual void stopCD(); + + SDL_CD *_cdrom; + int _cdTrack, _cdNumLoops, _cdStartFrame, _cdDuration; + uint32 _cdEndTime, _cdStopTime; +}; + +#endif |