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Diffstat (limited to 'engines/scumm/player/v2cms.h')
| -rw-r--r-- | engines/scumm/player/v2cms.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/engines/scumm/player/v2cms.h b/engines/scumm/player/v2cms.h new file mode 100644 index 0000000000..d022a64a5f --- /dev/null +++ b/engines/scumm/player/v2cms.h @@ -0,0 +1,177 @@ +/* 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. + * + */ + +#ifndef SCUMM_PLAYER_V2CMS_H +#define SCUMM_PLAYER_V2CMS_H + +#include "scumm/player/v2base.h" // for channel_data + +class CMSEmulator; + +namespace Scumm { + +/** + * Scumm V2 CMS/Gameblaster MIDI driver. + */ +class Player_V2CMS : public Player_V2Base { +public: + Player_V2CMS(ScummEngine *scumm, Audio::Mixer *mixer); + virtual ~Player_V2CMS(); + + // MusicEngine API + virtual void setMusicVolume(int vol); + virtual void startSound(int sound); + virtual void stopSound(int sound); + virtual void stopAllSounds(); + virtual int getMusicTimer(); + virtual int getSoundStatus(int sound) const; + + // AudioStream API + virtual int readBuffer(int16 *buffer, const int numSamples); + virtual bool isStereo() const { return true; } + +private: + struct Voice { + byte attack; + byte decay; + byte sustain; + byte release; + byte octadd; + int16 vibrato; + int16 vibrato2; + int16 noise; + }; + + struct Voice2 { + byte *amplitudeOutput; + byte *freqOutput; + byte *octaveOutput; + + uint8 channel; + int8 sustainLevel; + uint8 attackRate; + uint8 maxAmpl; + uint8 decayRate; + uint8 sustainRate; + uint8 releaseRate; + uint8 releaseTime; + int8 vibratoRate; + int8 vibratoDepth; + + int8 curVibratoRate; + int8 curVibratoUnk; + + int8 unkVibratoRate; + int8 unkVibratoDepth; + + int8 unkRate; + int8 unkCount; + + enum EnvelopeState { + kEnvelopeAttack, + kEnvelopeDecay, + kEnvelopeSustain, + kEnvelopeRelease + }; + + EnvelopeState nextProcessState; + uint8 curVolume; + uint8 curOctave; + uint8 curFreq; + + int8 octaveAdd; + + int8 playingNote; + Voice2 *nextVoice; + + byte chanNumber; + }; + + struct MusicChip { + byte ampl[4]; + byte freq[4]; + byte octave[2]; + }; + + Voice _cmsVoicesBase[16]; + Voice2 _cmsVoices[8]; + MusicChip _cmsChips[2]; + + uint8 _tempo; + uint8 _tempoSum; + byte _looping; + byte _octaveMask; + int16 _midiDelay; + Voice2 *_midiChannel[16]; + byte _midiChannelUse[16]; + byte *_midiData; + byte *_midiSongBegin; + + int _loadedMidiSong; + + byte _sfxFreq[4], _sfxAmpl[4], _sfxOctave[2]; + + byte _lastMidiCommand; + uint _outputTableReady; + byte _voiceTimer; + + int _musicTimer, _musicTimerTicks; + + void loadMidiData(byte *data, int sound); + void play(); + + void processChannel(Voice2 *channel); + void processRelease(Voice2 *channel); + void processAttack(Voice2 *channel); + void processDecay(Voice2 *channel); + void processSustain(Voice2 *channel); + void processVibrato(Voice2 *channel); + + void playMusicChips(const MusicChip *table); + void playNote(byte *&data); + void clearNote(byte *&data); + void offAllChannels(); + void playVoice(); + void processMidiData(); + + Voice2 *getFreeVoice(); + Voice2 *getPlayVoice(byte param); + + struct MidiNote { + byte frequency; + byte baseOctave; + }; + + static const MidiNote _midiNotes[132]; + static const byte _attackRate[16]; + static const byte _decayRate[16]; + static const byte _sustainRate[16]; + static const byte _releaseRate[16]; + static const byte _volumeTable[16]; + static const byte _cmsInitData[26]; + + CMSEmulator *_cmsEmu; +}; + +} // End of namespace Scumm + +#endif |