diff options
| -rw-r--r-- | audio/midiplayer.cpp | 172 | ||||
| -rw-r--r-- | audio/midiplayer.h | 117 | ||||
| -rw-r--r-- | audio/module.mk | 1 |
3 files changed, 290 insertions, 0 deletions
diff --git a/audio/midiplayer.cpp b/audio/midiplayer.cpp new file mode 100644 index 0000000000..12d03d73f8 --- /dev/null +++ b/audio/midiplayer.cpp @@ -0,0 +1,172 @@ +/* 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 "audio/midiplayer.h" +#include "audio/midiparser.h" + +#include "common/config-manager.h" + +namespace Audio { + +MidiPlayer::MidiPlayer() : + _driver(0), + _parser(0), + _isLooping(false), + _isPlaying(false), + _masterVolume(0), + _nativeMT32(false) { + + memset(_channelsTable, 0, sizeof(_channelsTable)); + memset(_channelsVolume, 127, sizeof(_channelsVolume)); + +// TODO +} + +MidiPlayer::~MidiPlayer() { +// TODO +} + +void MidiPlayer::setVolume(int volume) { + volume = CLIP(volume, 0, 255); + + if (_masterVolume == volume) + return; + + Common::StackLock lock(_mutex); + + _masterVolume = volume; + + for (int i = 0; i < kNumChannels; ++i) { + if (_channelsTable[i]) { + _channelsTable[i]->volume(_channelsVolume[i] * _masterVolume / 255); + } + } +} + +void MidiPlayer::syncVolume() { + int volume = ConfMan.getInt("music_volume"); + if (ConfMan.getBool("mute")) { + volume = -1; + } + setVolume(volume); +} + + +void MidiPlayer::send(uint32 b) { + byte channel = (byte)(b & 0x0F); + if ((b & 0xFFF0) == 0x07B0) { + // Adjust volume changes by master volume + byte volume = (byte)((b >> 16) & 0x7F); + _channelsVolume[channel] = volume; + volume = volume * _masterVolume / 255; + b = (b & 0xFF00FFFF) | (volume << 16); + } else if ((b & 0xFFF0) == 0x007BB0) { + // Only respond to All Notes Off if this channel + // has currently been allocated + if (!_channelsTable[channel]) + return; + } + + sendToChannel(channel, b); +} + +void MidiPlayer::sendToChannel(byte channel, uint32 b) { + if (!_channelsTable[channel]) { + _channelsTable[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel(); + // TODO: Some engines overload this method to insert code at this + // point which calls the channel's volume() method. + // Does this make sense, and should we maybe do it in general? + } + if (_channelsTable[channel]) + _channelsTable[channel]->send(b); +} + +void MidiPlayer::metaEvent(byte type, byte *data, uint16 length) { + switch (type) { + case 0x2F: // End of Track + endOfTrack(); + break; + default: + //warning("Unhandled meta event: %02x", type); + break; + } +} + +void MidiPlayer::endOfTrack() { + if (_isLooping) { + assert(_parser); + _parser->jumpToTick(0); + } else + stop(); +} + +#if 0 +void MidiPlayer::onTimer(void *data) { + assert(data); + ((MidiPlayer *)data)->onTimer(); +} + +void MidiPlayer::onTimer() { + Common::StackLock lock(_mutex); + + // FIXME: There are various alternatives for this function: + +#if 0 + if (_parser) { + _parser->onTimer(); + } +#elif 0 + if (_isPlaying) { + assert(_parser); + _parser->onTimer(); + } +#endif +} +#endif + + +void MidiPlayer::stop() { + Common::StackLock lock(_mutex); + + _isPlaying = false; + if (_parser) { + _parser->unloadMusic(); + _parser = NULL; + } +} + +void MidiPlayer::pause() { +// debugC(2, kDraciSoundDebugLevel, "Pausing track %d", _track); + setVolume(-1); // FIXME: This should be 0, shouldn't it? + _isPlaying = false; +} + +void MidiPlayer::resume() { +// debugC(2, kDraciSoundDebugLevel, "Resuming track %d", _track); + syncVolume(); + _isPlaying = true; +} + +} // End of namespace Audio diff --git a/audio/midiplayer.h b/audio/midiplayer.h new file mode 100644 index 0000000000..913d49c68c --- /dev/null +++ b/audio/midiplayer.h @@ -0,0 +1,117 @@ +/* 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 SOUND_MIDIPLAYER_H +#define SOUND_MIDIPLAYER_H + +#include "common/scummsys.h" +#include "common/mutex.h" +#include "audio/mididrv.h" + +class MidiParser; + +namespace Audio { + +/** + * Simple MIDI playback class. + * + * @note Currently incomplete, as it lacks play() methods. This is just a + * start of the real thing, which tries to include code replicated between + * several of our engines. + * + * @todo Document origin of this class. It is based on code shared by + * several engines (e.g. DRACI says it copied it from MADE, which took + * it from SAGE). + */ +class MidiPlayer : public MidiDriver_BASE { +public: + MidiPlayer(); + ~MidiPlayer(); + + // TODO: Implement ways to actually play stuff + //virtual void play(TODO); + // TODO: Document these + virtual void stop(); + virtual void pause(); + virtual void resume(); + + bool isPlaying() const { return _isPlaying; } + + int getVolume() const { return _masterVolume; } + virtual void setVolume(int volume); // FIXME: Overloaded by Tinsel + void syncVolume(); + + bool hasNativeMT32() const { return _nativeMT32; } + + // MidiDriver_BASE interface + virtual void send(uint32 b); + virtual void metaEvent(byte type, byte *data, uint16 length); + + /** + * This method is invoked by send() after suitably filtering + * the message b. + */ + virtual void sendToChannel(byte channel, uint32 b); + + /** + * This method is invoked by metaEvent when an end-of-track + * event arrives. By default, this tells the parser + * to jump to the start (if looping is enabled) resp. + * invokes stope(): + * Overload this to customize behavior. + */ + virtual void endOfTrack(); + +protected: + +#if 0 + // TODO: Start to make use of these, once we figured + // out the right way :) + static void onTimer(void *data); + virtual void onTimer(); +#endif + + enum { + kNumChannels = 16 + }; + + Common::Mutex _mutex; + MidiDriver *_driver; + MidiParser *_parser; + + MidiChannel *_channelsTable[kNumChannels]; + uint8 _channelsVolume[kNumChannels]; + + bool _isLooping; + bool _isPlaying; + int _masterVolume; // FIXME: byte or int ? + + bool _nativeMT32; +}; + + +} // End of namespace Audio + +#endif diff --git a/audio/module.mk b/audio/module.mk index 5b93c80d57..661d3ccad4 100644 --- a/audio/module.mk +++ b/audio/module.mk @@ -7,6 +7,7 @@ MODULE_OBJS := \ midiparser_smf.o \ midiparser_xmidi.o \ midiparser.o \ + midiplayer.o \ mixer.o \ mpu401.o \ musicplugin.o \ |