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-rw-r--r--audio/softsynth/ym2612.h179
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diff --git a/audio/softsynth/ym2612.h b/audio/softsynth/ym2612.h
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-/* 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_SOFTSYNTH_Y2612_H
-#define SOUND_SOFTSYNTH_Y2612_H
-
-#include "common/scummsys.h"
-
-#include "audio/softsynth/emumidi.h"
-
-////////////////////////////////////////
-//
-// Class declarations
-//
-////////////////////////////////////////
-
-class Voice2612;
-class Operator2612 {
-protected:
- Voice2612 *_owner;
- enum State { _s_ready, _s_attacking, _s_decaying, _s_sustaining, _s_releasing };
- State _state;
- int32 _currentLevel;
- int _frequency;
- uint32 _phase;
- int _lastOutput;
- int _feedbackLevel;
- int _detune;
- int _multiple;
- int32 _totalLevel;
- int _keyScale;
- int _velocity;
- int _specifiedTotalLevel;
- int _specifiedAttackRate;
- int _specifiedDecayRate;
- int _specifiedSustainLevel;
- int _specifiedSustainRate;
- int _specifiedReleaseRate;
- int _tickCount;
- int _attackTime;
- int32 _decayRate;
- int32 _sustainLevel;
- int32 _sustainRate;
- int32 _releaseRate;
-
-public:
- Operator2612 (Voice2612 *owner);
- ~Operator2612();
- void feedbackLevel(int level);
- void setInstrument(byte const *instrument);
- void velocity(int velo);
- void keyOn();
- void keyOff();
- void frequency(int freq);
- void nextTick(const int *phaseShift, int *outbuf, int buflen);
- bool inUse() { return (_state != _s_ready); }
-};
-
-class Voice2612 {
-public:
- Voice2612 *next;
- uint16 _rate;
-
-protected:
- Operator2612 *_opr[4];
- int _velocity;
- int _control7;
- int _note;
- int _frequencyOffs;
- int _frequency;
- int _algorithm;
-
- int *_buffer;
- int _buflen;
-
-public:
- Voice2612();
- ~Voice2612();
- void setControlParameter(int control, int value);
- void setInstrument(byte const *instrument);
- void velocity(int velo);
- void nextTick(int *outbuf, int buflen);
- void noteOn(int n, int onVelo);
- bool noteOff(int note);
- void pitchBend(int value);
- void recalculateFrequency();
-};
-
-class MidiChannel_YM2612 : public MidiChannel {
-protected:
- uint16 _rate;
- Voice2612 *_voices;
- Voice2612 *_next_voice;
-
-public:
- void removeAllVoices();
- void nextTick(int *outbuf, int buflen);
- void rate(uint16 r);
-
-public:
- MidiChannel_YM2612();
- virtual ~MidiChannel_YM2612();
-
- // MidiChannel interface
- MidiDriver *device() { return 0; }
- byte getNumber() { return 0; }
- void release() { }
- void send(uint32 b) { }
- void noteOff(byte note);
- void noteOn(byte note, byte onVelo);
- void programChange(byte program) { }
- void pitchBend(int16 value);
- void controlChange(byte control, byte value);
- void pitchBendFactor(byte value) { }
- void sysEx_customInstrument(uint32 type, const byte *instr);
-};
-
-class MidiDriver_YM2612 : public MidiDriver_Emulated {
-protected:
- MidiChannel_YM2612 *_channel[16];
-
- int _next_voice;
- int _volume;
-
-protected:
- void nextTick(int16 *buf1, int buflen);
- int volume(int val = -1) { if (val >= 0) _volume = val; return _volume; }
- void rate(uint16 r);
-
- void generateSamples(int16 *buf, int len);
-
-public:
- MidiDriver_YM2612(Audio::Mixer *mixer);
- virtual ~MidiDriver_YM2612();
-
- static void createLookupTables();
- static void removeLookupTables();
-
- int open();
- void close();
- void send(uint32 b);
- void send(byte channel, uint32 b); // Supports higher than channel 15
- uint32 property(int prop, uint32 param) { return 0; }
-
- void setPitchBendRange(byte channel, uint range) { }
- void sysEx(const byte *msg, uint16 length);
-
- MidiChannel *allocateChannel() { return 0; }
- MidiChannel *getPercussionChannel() { return 0; }
-
-
- // AudioStream API
- bool isStereo() const { return true; }
- int getRate() const { return _mixer->getOutputRate(); }
-};
-
-#endif
-