winamp/Src/external_dependencies/openmpt-trunk/soundlib/plugins/dmo/Distortion.h
2024-09-24 14:54:57 +02:00

97 lines
2.8 KiB
C++

/*
* Distortion.h
* ------------
* Purpose: Implementation of the DMO Distortion 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 Distortion final : public IMixPlugin
{
protected:
enum Parameters
{
kDistGain = 0,
kDistEdge,
kDistPreLowpassCutoff,
kDistPostEQCenterFrequency,
kDistPostEQBandwidth,
kDistNumParameters
};
std::array<float, kDistNumParameters> m_param;
// Pre-EQ coefficients
float m_preEQz1[2], m_preEQb1, m_preEQa0;
// Post-EQ coefficients
float m_postEQz1[2], m_postEQz2[2], m_postEQa0, m_postEQb0, m_postEQb1;
uint8 m_edge, m_shift;
public:
static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
Distortion(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
void Release() override { delete this; }
int32 GetUID() const override { return 0xEF114C90; }
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 kDistNumParameters; }
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("Distortion"); }
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:
static float FreqInHertz(float param) { return 100.0f + param * 7900.0f; }
float GainInDecibel() const { return -60.0f + m_param[kDistGain] * 60.0f; }
void RecalculateDistortionParams();
};
} // namespace DMO
OPENMPT_NAMESPACE_END
#endif // !NO_PLUGINS