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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* DigiBoosterEcho.cpp
* -------------------
* Purpose: Implementation of the DigiBooster Pro Echo DSP
* Notes : (currently none)
* Authors: OpenMPT Devs, based on original code by Grzegorz Kraszewski (BSD 2-clause)
* 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 "DigiBoosterEcho.h"
OPENMPT_NAMESPACE_BEGIN
IMixPlugin* DigiBoosterEcho::Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct)
{
return new (std::nothrow) DigiBoosterEcho(factory, sndFile, mixStruct);
}
DigiBoosterEcho::DigiBoosterEcho(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct)
: IMixPlugin(factory, sndFile, mixStruct)
, m_sampleRate(sndFile.GetSampleRate())
, m_chunk(PluginChunk::Default())
{
m_mixBuffer.Initialize(2, 2);
InsertIntoFactoryList();
}
void DigiBoosterEcho::Process(float *pOutL, float *pOutR, uint32 numFrames)
{
if(!m_bufferSize)
return;
const float *srcL = m_mixBuffer.GetInputBuffer(0), *srcR = m_mixBuffer.GetInputBuffer(1);
float *outL = m_mixBuffer.GetOutputBuffer(0), *outR = m_mixBuffer.GetOutputBuffer(1);
for(uint32 i = numFrames; i != 0; i--)
{
int readPos = m_writePos - m_delayTime;
if(readPos < 0)
readPos += m_bufferSize;
float l = *srcL++, r = *srcR++;
float lDelay = m_delayLine[readPos * 2], rDelay = m_delayLine[readPos * 2 + 1];
// Calculate the delay
float al = l * m_NCrossNBack;
al += r * m_PCrossNBack;
al += lDelay * m_NCrossPBack;
al += rDelay * m_PCrossPBack;
float ar = r * m_NCrossNBack;
ar += l * m_PCrossNBack;
ar += rDelay * m_NCrossPBack;
ar += lDelay * m_PCrossPBack;
// Prevent denormals
if(std::abs(al) < 1e-24f)
al = 0.0f;
if(std::abs(ar) < 1e-24f)
ar = 0.0f;
m_delayLine[m_writePos * 2] = al;
m_delayLine[m_writePos * 2 + 1] = ar;
m_writePos++;
if(m_writePos == m_bufferSize)
m_writePos = 0;
// Output samples now
*outL++ = (l * m_NMix + lDelay * m_PMix);
*outR++ = (r * m_NMix + rDelay * m_PMix);
}
ProcessMixOps(pOutL, pOutR, m_mixBuffer.GetOutputBuffer(0), m_mixBuffer.GetOutputBuffer(1), numFrames);
}
void DigiBoosterEcho::SaveAllParameters()
{
m_pMixStruct->defaultProgram = -1;
try
{
m_pMixStruct->pluginData.resize(sizeof(m_chunk));
memcpy(m_pMixStruct->pluginData.data(), &m_chunk, sizeof(m_chunk));
} catch(mpt::out_of_memory e)
{
mpt::delete_out_of_memory(e);
m_pMixStruct->pluginData.clear();
}
}
void DigiBoosterEcho::RestoreAllParameters(int32 program)
{
if(m_pMixStruct->pluginData.size() == sizeof(m_chunk) && !memcmp(m_pMixStruct->pluginData.data(), "Echo", 4))
{
memcpy(&m_chunk, m_pMixStruct->pluginData.data(), sizeof(m_chunk));
} else
{
IMixPlugin::RestoreAllParameters(program);
}
RecalculateEchoParams();
}
PlugParamValue DigiBoosterEcho::GetParameter(PlugParamIndex index)
{
if(index < kEchoNumParameters)
{
return m_chunk.param[index] / 255.0f;
}
return 0;
}
void DigiBoosterEcho::SetParameter(PlugParamIndex index, PlugParamValue value)
{
if(index < kEchoNumParameters)
{
m_chunk.param[index] = mpt::saturate_round<uint8>(mpt::safe_clamp(value, 0.0f, 1.0f) * 255.0f);
RecalculateEchoParams();
}
}
void DigiBoosterEcho::Resume()
{
m_isResumed = true;
m_sampleRate = m_SndFile.GetSampleRate();
RecalculateEchoParams();
PositionChanged();
}
void DigiBoosterEcho::PositionChanged()
{
m_bufferSize = (m_sampleRate >> 1) + (m_sampleRate >> 6);
try
{
m_delayLine.assign(m_bufferSize * 2, 0);
} catch(mpt::out_of_memory e)
{
mpt::delete_out_of_memory(e);
m_bufferSize = 0;
}
m_writePos = 0;
}
#ifdef MODPLUG_TRACKER
CString DigiBoosterEcho::GetParamName(PlugParamIndex param)
{
switch(param)
{
case kEchoDelay: return _T("Delay");
case kEchoFeedback: return _T("Feedback");
case kEchoMix: return _T("Wet / Dry Ratio");
case kEchoCross: return _T("Cross Echo");
}
return CString();
}
CString DigiBoosterEcho::GetParamLabel(PlugParamIndex param)
{
if(param == kEchoDelay)
return _T("ms");
return CString();
}
CString DigiBoosterEcho::GetParamDisplay(PlugParamIndex param)
{
CString s;
if(param == kEchoMix)
{
int wet = (m_chunk.param[kEchoMix] * 100) / 255;
s.Format(_T("%d%% / %d%%"), wet, 100 - wet);
} else if(param < kEchoNumParameters)
{
int val = m_chunk.param[param];
if(param == kEchoDelay)
{
if(val == 0)
val = 167;
val *= 2;
}
s.Format(_T("%d"), val);
}
return s;
}
#endif // MODPLUG_TRACKER
IMixPlugin::ChunkData DigiBoosterEcho::GetChunk(bool)
{
auto data = reinterpret_cast<const std::byte *>(&m_chunk);
return ChunkData(data, sizeof(m_chunk));
}
void DigiBoosterEcho::SetChunk(const ChunkData &chunk, bool)
{
auto data = chunk.data();
if(chunk.size() == sizeof(chunk) && !memcmp(data, "Echo", 4))
{
memcpy(&m_chunk, data, chunk.size());
RecalculateEchoParams();
}
}
void DigiBoosterEcho::RecalculateEchoParams()
{
// The fallback value when the delay is 0 was determined experimentally from DBPro 2.21 output.
// The C implementation of libdigibooster3 has no specific handling of this value and thus produces a delay with maximum length.
m_delayTime = ((m_chunk.param[kEchoDelay] ? m_chunk.param[kEchoDelay] : 167u) * m_sampleRate + 250u) / 500u;
m_PMix = (m_chunk.param[kEchoMix]) * (1.0f / 256.0f);
m_NMix = (256 - m_chunk.param[kEchoMix]) * (1.0f / 256.0f);
m_PCrossPBack = (m_chunk.param[kEchoCross] * m_chunk.param[kEchoFeedback]) * (1.0f / 65536.0f);
m_PCrossNBack = (m_chunk.param[kEchoCross] * (256 - m_chunk.param[kEchoFeedback])) * (1.0f / 65536.0f);
m_NCrossPBack = ((m_chunk.param[kEchoCross] - 256) * m_chunk.param[kEchoFeedback]) * (1.0f / 65536.0f);
m_NCrossNBack = ((m_chunk.param[kEchoCross] - 256) * (m_chunk.param[kEchoFeedback] - 256)) * (1.0f / 65536.0f);
}
OPENMPT_NAMESPACE_END
#endif // NO_PLUGINS
|
