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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.
*
* $URL$
* $Id$
*
*/
// see if all engines using this class are DISABLED
#if !defined(ENABLE_KYRA)
// normal Header Guard
#elif !defined SOUND_MODS_MAXTRAX_H
#define SOUND_MODS_MAXTRAX_H
#include "sound/mods/paula.h"
namespace Audio {
class MaxTrax : public Paula {
public:
MaxTrax(int rate, bool stereo);
virtual ~MaxTrax();
bool load(Common::SeekableReadStream &musicData, bool loadScores = true, bool loadSamples = true);
bool playSong(int songIndex, bool loop = false);
void advanceSong(int advance = 1);
int playNote(byte note, byte patch, uint16 duration, uint16 volume, bool rightSide);
void setVolume(const byte volume) { _playerCtx.volume = volume; }
void setTempo(const uint16 tempo) {
_playerCtx.tickUnit = (int32)(((uint32)(tempo & 0xFFF0) << 8) / (uint16)(5 * _playerCtx.vBlankFreq));
}
void stopMusic();
protected:
void interrupt();
private:
enum { kNumPatches = 64, kNumVoices = 4, kNumChannels = 16, kNumExtraChannels = 1 };
enum { kPriorityScore, kPriorityNote, kPrioritySound };
// int16 _microtonal[128];
struct Event {
uint16 startTime;
uint16 stopTime;
byte command;
byte parameter;
};
struct Score {
const Event *events;
uint32 numEvents;
} *_scores;
int _numScores;
struct {
uint16 vBlankFreq;
int32 ticks;
int32 tickUnit;
uint16 frameUnit;
uint16 maxScoreNum;
uint16 tempo;
uint16 tempoInitial;
uint16 tempoStart;
int16 tempoDelta;
int32 tempoTime;
int32 tempoTicks;
byte volume;
bool filterOn;
bool handleVolume;
bool musicPlaying;
bool musicLoop;
int scoreIndex;
const Event *nextEvent;
int32 nextEventTime;
} _playerCtx;
struct Envelope {
uint16 duration;
uint16 volume;
};
const struct Patch {
const Envelope *attackPtr;
//Envelope *releasePtr;
uint16 attackLen;
uint16 releaseLen;
int16 tune;
uint16 volume;
// this was the SampleData struct in the assembler source
const int8 *samplePtr;
uint32 sampleTotalLen;
uint32 sampleAttackLen;
uint16 sampleOctaves;
} _patch[kNumPatches];
struct ChannelContext {
const Patch *patch;
uint16 regParamNumber;
uint16 modulation;
uint16 modulationTime;
int16 microtonal;
uint16 portamentoTime;
int16 pitchBend;
int16 pitchReal;
int8 pitchBendRange;
uint8 volume;
uint8 voicesActive;
enum {
kFlagRightChannel = 1 << 0,
kFlagPortamento = 1 << 1,
kFlagDamper = 1 << 2,
kFlagMono = 1 << 3,
kFlagMicrotonal = 1 << 4,
kFlagModVolume = 1 << 5
};
byte flags;
bool isAltered;
uint8 lastNote;
// uint8 program;
} _channelCtx[kNumChannels + kNumExtraChannels];
struct VoiceContext {
ChannelContext *channel;
const Patch *patch;
const Envelope *envelope;
// uint32 uinqueId;
int32 preCalcNote;
uint32 ticksLeft;
int32 portaTicks;
int32 incrVolume;
// int32 periodOffset;
/*ifne FASTSOUND
APTR voice_CurFastIOB ; current fast iob playing
APTR voice_NextFastIOB ; next fast iob to play
APTR voice_FastBuffer ; pointer to buffer area
endc*/
uint16 envelopeLeft;
uint16 noteVolume;
uint16 baseVolume;
uint16 lastPeriod;
byte baseNote;
byte endNote;
byte octave;
// byte number;
// byte link;
byte priority;
enum {
kStatusFree,
kStatusHalt,
kStatusDecay,
kStatusRelease,
kStatusSustain,
kStatusAttack,
kStatusStart
};
byte status;
bool hasDamper;
bool isBlocked;
byte lastVolume;
bool hasPortamento;
byte dmaOff;
int32 stopEventTime;
byte stopEventCommand; // TODO: Remove?
byte stopEventParameter; // TODO: Remove?
} _voiceCtx[kNumVoices];
void freePatches();
void freeScores();
void resetChannel(ChannelContext &chan, bool rightChannel);
static int8 pickvoice(const VoiceContext voice[4], uint pick, int16 pri);
static uint16 calcNote(const VoiceContext &voice);
int8 noteOn(ChannelContext &channel, byte note, uint16 volume, uint16 pri);
void noteOff(VoiceContext &voice, byte note);
void killVoice(byte num);
static void outPutEvent(const Event &ev, int num = -1);
static void outPutScore(const Score &sc, int num = -1);
};
} // End of namespace Audio
#endif // !defined SOUND_MODS_MAXTRAX_H
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