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/* Copyright (c) 2003-2005 Various contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef MT32EMU_PARTIAL_H
#define MT32EMU_PARTIAL_H
namespace MT32Emu {
class Synth;
struct NoteLookup;
enum EnvelopeType {
EnvelopeType_amp = 0,
EnvelopeType_filt = 1,
EnvelopeType_pitch = 2
};
struct EnvelopeStatus {
Bit32s envpos;
Bit32s envstat;
Bit32s envbase;
Bit32s envdist;
Bit32s envsize;
bool sustaining;
bool decaying;
Bit32s prevlevel;
Bit32s counter;
Bit32s count;
};
// Class definition of MT-32 partials. 32 in all.
class Partial {
private:
Synth *synth;
int ownerPart; // -1 if unassigned
int mixType;
int structurePosition; // 0 or 1 of a structure pair
bool useNoisePair;
Bit16s myBuffer[MAX_SAMPLE_OUTPUT];
// Keyfollowed note value
#if MT32EMU_ACCURATENOTES == 1
NoteLookup noteLookupStorage;
float noteVal;
#else
int noteVal;
int fineShift;
#endif
const NoteLookup *noteLookup; // LUTs for this noteVal
const KeyLookup *keyLookup; // LUTs for the clamped (12..108) key
// Keyfollowed filter values
int realVal;
int filtVal;
// Only used for PCM partials
int pcmNum;
PCMWaveEntry *pcmWave;
int pulsewidth;
Bit32u lfoPos;
soundaddr partialOff;
Bit32u ampEnvVal;
Bit32u pitchEnvVal;
float history[32];
bool pitchSustain;
int loopPos;
dpoly *poly;
int bendShift;
Bit16s *mixBuffers(Bit16s *buf1, Bit16s *buf2, int len);
Bit16s *mixBuffersRingMix(Bit16s *buf1, Bit16s *buf2, int len);
Bit16s *mixBuffersRing(Bit16s *buf1, Bit16s *buf2, int len);
void mixBuffersStereo(Bit16s *buf1, Bit16s *buf2, Bit16s *outBuf, int len);
Bit32s getFiltEnvelope();
Bit32u getAmpEnvelope();
Bit32s getPitchEnvelope();
void initKeyFollow(int freqNum);
public:
const PatchCache *patchCache;
EnvelopeStatus envs[3];
bool play;
PatchCache cachebackup;
Partial *pair;
bool alreadyOutputed;
Bit32u age;
Partial(Synth *synth);
~Partial();
int getOwnerPart() const;
int getKey() const;
const dpoly *getDpoly() const;
bool isActive();
void activate(int part);
void deactivate(void);
void startPartial(dpoly *usePoly, const PatchCache *useCache, Partial *pairPartial);
void startDecay(EnvelopeType envnum, Bit32s startval);
void startDecayAll();
void setBend(float factor);
bool shouldReverb();
// Returns true only if data written to buffer
// This function (unlike the one below it) returns processed stereo samples
// made from combining this single partial with its pair, if it has one.
bool produceOutput(Bit16s * partialBuf, long length);
// This function produces mono sample output using the partial's private internal buffer
Bit16s *generateSamples(long length);
};
}
#endif
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