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
|
/*
* ParamEq.h
* ---------
* Purpose: Implementation of the DMO Parametric Equalizer 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.
*/
#ifndef NO_PLUGINS
#include "../PlugInterface.h"
OPENMPT_NAMESPACE_BEGIN
namespace DMO
{
class ParamEq final : public IMixPlugin
{
protected:
enum Parameters
{
kEqCenter = 0,
kEqBandwidth,
kEqGain,
kEqNumParameters
};
std::array<float, kEqNumParameters> m_param;
// Equalizer coefficients
float b0DIVa0, b1DIVa0, b2DIVa0, a1DIVa0, a2DIVa0;
// Equalizer memory
float x1[2], x2[2];
float y1[2], y2[2];
float m_maxFreqParam;
public:
static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
ParamEq(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
void Release() override { delete this; }
int32 GetUID() const override { return 0x120CED89; }
int32 GetVersion() const override { return 0; }
void Idle() override { }
uint32 GetLatency() const override { return 0; }
void Process(float *pOutL, float *pOutR, uint32 numFrames) override;
float RenderSilence(uint32) override { return 0.0f; }
int32 GetNumPrograms() const override { return 0; }
int32 GetCurrentProgram() override { return 0; }
void SetCurrentProgram(int32) override { }
PlugParamIndex GetNumParameters() const override { return kEqNumParameters; }
PlugParamValue GetParameter(PlugParamIndex index) override;
void SetParameter(PlugParamIndex index, PlugParamValue value) override;
void Resume() override;
void Suspend() override { m_isResumed = false; }
void PositionChanged() override;
bool IsInstrument() const override { return false; }
bool CanRecieveMidiEvents() override { return false; }
bool ShouldProcessSilence() override { return true; }
#ifdef MODPLUG_TRACKER
CString GetDefaultEffectName() override { return _T("ParamEq"); }
CString GetParamName(PlugParamIndex param) override;
CString GetParamLabel(PlugParamIndex) override;
CString GetParamDisplay(PlugParamIndex param) override;
CString GetCurrentProgramName() override { return CString(); }
void SetCurrentProgramName(const CString &) override { }
CString GetProgramName(int32) override { return CString(); }
bool HasEditor() const override { return false; }
#endif
int GetNumInputChannels() const override { return 2; }
int GetNumOutputChannels() const override { return 2; }
protected:
float BandwidthInSemitones() const { return 1.0f + m_param[kEqBandwidth] * 35.0f; }
float FreqInHertz() const { return 80.0f + m_param[kEqCenter] * 15920.0f; }
float GainInDecibel() const { return (m_param[kEqGain] - 0.5f) * 30.0f; }
void RecalculateEqParams();
};
} // namespace DMO
OPENMPT_NAMESPACE_END
#endif // !NO_PLUGINS
|
