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Diffstat (limited to 'engines/scumm/imuse/pcspk.h')
-rw-r--r-- | engines/scumm/imuse/pcspk.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/engines/scumm/imuse/pcspk.h b/engines/scumm/imuse/pcspk.h new file mode 100644 index 0000000000..8edf86e927 --- /dev/null +++ b/engines/scumm/imuse/pcspk.h @@ -0,0 +1,147 @@ +/* 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_IMUSE_PCSPK_H +#define SCUMM_IMUSE_PCSPK_H + +#include "audio/softsynth/emumidi.h" +#include "audio/softsynth/pcspk.h" + +namespace Scumm { + +class PcSpkDriver : public MidiDriver_Emulated { +public: + PcSpkDriver(Audio::Mixer *mixer); + ~PcSpkDriver(); + + virtual int open(); + virtual void close(); + + virtual void send(uint32 d); + virtual void sysEx_customInstrument(byte channel, uint32 type, const byte *instr); + + virtual MidiChannel *allocateChannel(); + virtual MidiChannel *getPercussionChannel() { return 0; } + + bool isStereo() const { return _pcSpk.isStereo(); } + int getRate() const { return _pcSpk.getRate(); } +protected: + void generateSamples(int16 *buf, int len); + void onTimer(); + +private: + Audio::PCSpeaker _pcSpk; + + void updateNote(); + void output(uint16 out); + + struct EffectEnvelope { + uint8 state; + uint16 currentLevel; + uint16 duration; + uint16 maxLevel; + uint16 startLevel; + uint8 loop; + uint8 stateTargetLevels[4]; + uint8 stateModWheelLevels[4]; + uint8 modWheelSensitivity; + uint8 modWheelState; + uint8 modWheelLast; + uint16 stateNumSteps; + uint16 stateStepCounter; + uint16 changePerStep; + uint16 dir; + uint16 changePerStepRem; + uint16 changeCountRem; + }; + + struct EffectDefinition { + uint16 phase; + uint8 type; + uint8 enabled; + EffectEnvelope *envelope; + }; + + struct MidiChannel_PcSpk; + + struct OutputChannel { + uint8 active; + uint8 note; + uint8 sustainNoteOff; + uint8 length; + //const uint8 *instrument; + uint8 unkA; + uint8 unkB; + uint8 unkC; + uint16 unkE; + EffectEnvelope effectEnvelopeA; + EffectDefinition effectDefA; + EffectEnvelope effectEnvelopeB; + EffectDefinition effectDefB; + uint16 unk60; + }; + + struct MidiChannel_PcSpk : public MidiChannel { + virtual MidiDriver *device(); + virtual byte getNumber(); + virtual void release(); + + virtual void send(uint32 b); + virtual void noteOff(byte note); + virtual void noteOn(byte note, byte velocity); + virtual void programChange(byte program); + virtual void pitchBend(int16 bend); + virtual void controlChange(byte control, byte value); + virtual void pitchBendFactor(byte value); + virtual void priority(byte value); + virtual void sysEx_customInstrument(uint32 type, const byte *instr); + + void init(PcSpkDriver *owner, byte channel); + bool allocate(); + + PcSpkDriver *_owner; + bool _allocated; + byte _channel; + + OutputChannel _out; + uint8 _instrument[23]; + uint8 _programNr; + uint8 _priority; + uint8 _tl; + uint8 _modWheel; + uint8 _sustain; + uint8 _pitchBendFactor; + int16 _pitchBend; + }; + + MidiChannel_PcSpk _channels[6]; + MidiChannel_PcSpk *_activeChannel; + + //static const byte _outInstrumentData[]; + static const byte _outputTable1[]; + static const byte _outputTable2[]; + static const uint16 _frequencyTable[]; +}; + +} // End of namespace Scumm + +#endif + |