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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Gargle.cpp
* ----------
* Purpose: Implementation of the DMO Gargle DSP (for non-Windows platforms)
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#include "stdafx.h"
#ifndef NO_PLUGINS
#include "../../Sndfile.h"
#include "Gargle.h"
#endif // !NO_PLUGINS
OPENMPT_NAMESPACE_BEGIN
#ifndef NO_PLUGINS
namespace DMO
{
IMixPlugin* Gargle::Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct)
{
return new (std::nothrow) Gargle(factory, sndFile, mixStruct);
}
Gargle::Gargle(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct)
: IMixPlugin(factory, sndFile, mixStruct)
{
m_param[kGargleRate] = 0.02f;
m_param[kGargleWaveShape] = 0.0f;
m_mixBuffer.Initialize(2, 2);
InsertIntoFactoryList();
}
void Gargle::Process(float *pOutL, float *pOutR, uint32 numFrames)
{
if(!m_mixBuffer.Ok())
return;
const float *inL = m_mixBuffer.GetInputBuffer(0), *inR = m_mixBuffer.GetInputBuffer(1);
float *outL = m_mixBuffer.GetOutputBuffer(0), *outR = m_mixBuffer.GetOutputBuffer(1);
const bool triangle = m_param[kGargleWaveShape] < 1.0f;
for(uint32 frame = numFrames; frame != 0;)
{
if(m_counter < m_periodHalf)
{
// First half of gargle period
const uint32 remain = std::min(frame, m_periodHalf - m_counter);
if(triangle)
{
const uint32 stop = m_counter + remain;
const float factor = 1.0f / m_periodHalf;
for(uint32 i = m_counter; i < stop; i++)
{
*outL++ = *inL++ * i * factor;
*outR++ = *inR++ * i * factor;
}
} else
{
for(uint32 i = 0; i < remain; i++)
{
*outL++ = *inL++;
*outR++ = *inR++;
}
}
frame -= remain;
m_counter += remain;
} else
{
// Second half of gargle period
const uint32 remain = std::min(frame, m_period - m_counter);
if(triangle)
{
const uint32 stop = m_period - m_counter - remain;
const float factor = 1.0f / m_periodHalf;
for(uint32 i = m_period - m_counter; i > stop; i--)
{
*outL++ = *inL++ * i * factor;
*outR++ = *inR++ * i * factor;
}
} else
{
for(uint32 i = 0; i < remain; i++)
{
*outL++ = 0;
*outR++ = 0;
}
inL += remain;
inR += remain;
}
frame -= remain;
m_counter += remain;
if(m_counter >= m_period) m_counter = 0;
}
}
ProcessMixOps(pOutL, pOutR, m_mixBuffer.GetOutputBuffer(0), m_mixBuffer.GetOutputBuffer(1), numFrames);
}
PlugParamValue Gargle::GetParameter(PlugParamIndex index)
{
if(index < kGargleNumParameters)
{
return m_param[index];
}
return 0;
}
void Gargle::SetParameter(PlugParamIndex index, PlugParamValue value)
{
if(index < kGargleNumParameters)
{
value = mpt::safe_clamp(value, 0.0f, 1.0f);
if(index == kGargleWaveShape)
value = mpt::round(value);
m_param[index] = value;
RecalculateGargleParams();
}
}
void Gargle::Resume()
{
RecalculateGargleParams();
m_counter = 0;
m_isResumed = true;
}
#ifdef MODPLUG_TRACKER
CString Gargle::GetParamName(PlugParamIndex param)
{
switch(param)
{
case kGargleRate: return _T("Rate");
case kGargleWaveShape: return _T("WaveShape");
}
return CString();
}
CString Gargle::GetParamLabel(PlugParamIndex param)
{
switch(param)
{
case kGargleRate: return _T("Hz");
}
return CString();
}
CString Gargle::GetParamDisplay(PlugParamIndex param)
{
CString s;
switch(param)
{
case kGargleRate:
s.Format(_T("%u"), RateInHertz());
break;
case kGargleWaveShape:
return (m_param[param] < 0.5) ? _T("Triangle") : _T("Square");
}
return s;
}
#endif // MODPLUG_TRACKER
uint32 Gargle::RateInHertz() const
{
return static_cast<uint32>(mpt::round(std::clamp(m_param[kGargleRate], 0.0f, 1.0f) * 999.0f)) + 1;
}
void Gargle::RecalculateGargleParams()
{
m_period = m_SndFile.GetSampleRate() / RateInHertz();
if(m_period < 2) m_period = 2;
m_periodHalf = m_period / 2;
LimitMax(m_counter, m_period);
}
} // namespace DMO
#else
MPT_MSVC_WORKAROUND_LNK4221(Gargle)
#endif // !NO_PLUGINS
OPENMPT_NAMESPACE_END
|
