1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* Copyright (c) 2003-2004 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 envstatus {
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; // Only used for sending debug output
int ownerPart; // -1 if unassigned
int mixType;
int structurePosition; // 0 or 1 of a structure pair
bool useNoisePair;
Bit16s myBuffer[MAX_SAMPLE_OUTPUT];
bool play;
// Keyfollowed note value
int noteVal;
NoteLookup *noteLookup; // Lookup stuff for this noteVal
int keyVal;
NoteLookup *keyLookup;
// Keyfollowed filter values
int realVal;
int filtVal;
envstatus envs[3];
int pulsewidth;
Bit32u lfoPos;
soundaddr partialOff;
Bit32u ampEnvCache;
Bit32u pitchEnvCache;
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();
Bit32s getAmpEnvelope();
Bit32s getPitchEnvelope();
void initKeyFollow(int freqNum);
public:
PatchCache *patchCache;
PatchCache cachebackup;
Partial *pair;
bool alreadyOutputed;
Bit64s age;
Partial(Synth *synth);
~Partial();
int getOwnerPart();
bool isActive();
void activate(int part);
void deactivate(void);
void startPartial(dpoly *usePoly, 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
|
