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Diffstat (limited to 'sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.h')
| -rw-r--r-- | sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.h b/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.h new file mode 100644 index 0000000000..1f9d610d9d --- /dev/null +++ b/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.h @@ -0,0 +1,171 @@ +/* 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 TOWNS_PC98_FMSYNTH_H +#define TOWNS_PC98_FMSYNTH_H + +#include "sound/audiostream.h" +#include "sound/mixer.h" +#include "common/list.h" + +class TownsPC98_FmSynthOperator; +class TownsPC98_FmSynthSquareSineSource; +class TownsPC98_FmSynthPercussionSource; + +enum EnvelopeState { + kEnvReady, + kEnvAttacking, + kEnvDecaying, + kEnvSustaining, + kEnvReleasing +}; + +class TownsPC98_FmSynth : public Audio::AudioStream { +public: + enum EmuType { + kTypeTowns, + kType26, + kType86 + }; + + TownsPC98_FmSynth(Audio::Mixer *mixer, EmuType type); + virtual ~TownsPC98_FmSynth(); + + virtual bool init(); + virtual void reset(); + + void writeReg(uint8 part, uint8 regAddress, uint8 value); + + // AudioStream interface + int readBuffer(int16 *buffer, const int numSamples); + bool isStereo() const { return true; } + bool endOfData() const { return false; } + int getRate() const { return _mixer->getOutputRate(); } + +protected: + // Implement this in your inherited class if your driver generates + // additional output that has to be inserted into the buffer. + virtual void nextTickEx(int32 *buffer, uint32 bufferSize) {} + + void toggleRegProtection(bool prot) { _regProtectionFlag = prot; } + uint8 readSSGStatus(); + + virtual void timerCallbackA() = 0; + virtual void timerCallbackB() = 0; + + // The audio driver can store and apply two different audio settings + // (usually for music and sound effects). The channel mask will determine + // which channels get effected by the setting. The first bits will be + // the normal fm channels, the next bits the ssg channels and the final + // bit the rhythm channel. + void setVolumeIntern(int volA, int volB); + void setVolumeChannelMasks(int channelMaskA, int channelMaskB); + + const int _numChan; + const int _numSSG; + const bool _hasPercussion; + + Common::Mutex _mutex; +private: + void generateTables(); + void nextTick(int32 *buffer, uint32 bufferSize); + void generateOutput(int32 &leftSample, int32 &rightSample, int32 *del, int32 *feed); + + struct ChanInternal { + ChanInternal() { + memset(this, 0, sizeof(ChanInternal)); + } + + ~ChanInternal() { + for (uint i = 0; i < ARRAYSIZE(opr); ++i) + delete opr[i]; + } + + void ampModSensitivity(uint32 value) { ampModSvty = (1 << (3 - value)) - (((value >> 1) & 1) | (value & 1)); } + void frqModSensitivity(uint32 value) { frqModSvty = value << 5; } + + uint16 frqTemp; + bool enableLeft; + bool enableRight; + bool updateEnvelopeParameters; + int32 feedbuf[3]; + uint8 algorithm; + + uint32 ampModSvty; + uint32 frqModSvty; + + + TownsPC98_FmSynthOperator *opr[4]; + }; + + TownsPC98_FmSynthSquareSineSource *_ssg; + TownsPC98_FmSynthPercussionSource *_prc; + ChanInternal *_chanInternal; + + uint8 *_oprRates; + uint8 *_oprRateshift; + uint8 *_oprAttackDecay; + uint32 *_oprFrq; + uint32 *_oprSinTbl; + int32 *_oprLevelOut; + int32 *_oprDetune; + + bool _regProtectionFlag; + + typedef void (TownsPC98_FmSynth::*ChipTimerProc)(); + + struct ChipTimer { + bool enabled; + uint16 value; + + int32 smpTillCb; + uint32 smpTillCbRem; + int32 smpPerCb; + uint32 smpPerCbRem; + + ChipTimerProc cb; + }; + + ChipTimer _timers[2]; + + int _volMaskA, _volMaskB; + uint16 _volumeA, _volumeB; + + const float _baserate; + uint32 _timerbase; + + Audio::Mixer *_mixer; + Audio::SoundHandle _soundHandle; + + static const uint8 _percussionData[]; + static const uint32 _adtStat[]; + static const uint8 _detSrc[]; + static const int _ssgTables[]; + + bool _ready; +}; + +#endif + |