99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
/*
|
|
* 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
|