127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/*
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* DigiBoosterEcho.h
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* -----------------
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* Purpose: Implementation of the DigiBooster Pro Echo DSP
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#ifndef NO_PLUGINS
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#include "PlugInterface.h"
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OPENMPT_NAMESPACE_BEGIN
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class DigiBoosterEcho final : public IMixPlugin
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{
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public:
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enum Parameters
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{
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kEchoDelay = 0,
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kEchoFeedback,
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kEchoMix,
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kEchoCross,
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kEchoNumParameters
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};
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// Our settings chunk for file I/O, as it will be written to files
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struct PluginChunk
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{
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char id[4];
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uint8 param[kEchoNumParameters];
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static PluginChunk Create(uint8 delay, uint8 feedback, uint8 mix, uint8 cross)
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{
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static_assert(sizeof(PluginChunk) == 8);
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PluginChunk result;
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memcpy(result.id, "Echo", 4);
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result.param[kEchoDelay] = delay;
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result.param[kEchoFeedback] = feedback;
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result.param[kEchoMix] = mix;
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result.param[kEchoCross] = cross;
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return result;
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}
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static PluginChunk Default()
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{
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return Create(80, 150, 80, 255);
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}
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};
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protected:
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std::vector<float> m_delayLine; // Echo delay line
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uint32 m_bufferSize = 0; // Delay line length in frames
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uint32 m_writePos = 0; // Current write position in the delay line
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uint32 m_delayTime = 0; // In frames
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uint32 m_sampleRate = 0;
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// Echo calculation coefficients
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float m_PMix, m_NMix;
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float m_PCrossPBack, m_PCrossNBack;
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float m_NCrossPBack, m_NCrossNBack;
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// Settings chunk for file I/O
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PluginChunk m_chunk;
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public:
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static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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DigiBoosterEcho(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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void Release() override { delete this; }
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void SaveAllParameters() override;
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void RestoreAllParameters(int32 program) override;
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int32 GetUID() const override { int32le id; memcpy(&id, "Echo", 4); return id; }
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int32 GetVersion() const override { return 0; }
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void Idle() override { }
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uint32 GetLatency() const override { return 0; }
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void Process(float *pOutL, float *pOutR, uint32 numFrames) override;
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float RenderSilence(uint32) override { return 0.0f; }
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int32 GetNumPrograms() const override { return 0; }
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int32 GetCurrentProgram() override { return 0; }
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void SetCurrentProgram(int32) override { }
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PlugParamIndex GetNumParameters() const override { return kEchoNumParameters; }
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PlugParamValue GetParameter(PlugParamIndex index) override;
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void SetParameter(PlugParamIndex index, PlugParamValue value) override;
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void Resume() override;
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void Suspend() override { m_isResumed = false; }
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void PositionChanged() override;
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bool IsInstrument() const override { return false; }
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bool CanRecieveMidiEvents() override { return false; }
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bool ShouldProcessSilence() override { return true; }
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#ifdef MODPLUG_TRACKER
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CString GetDefaultEffectName() override { return _T("Echo"); }
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CString GetParamName(PlugParamIndex param) override;
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CString GetParamLabel(PlugParamIndex) override;
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CString GetParamDisplay(PlugParamIndex param) override;
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CString GetCurrentProgramName() override { return CString(); }
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void SetCurrentProgramName(const CString &) override { }
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CString GetProgramName(int32) override { return CString(); }
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bool HasEditor() const override { return false; }
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#endif
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int GetNumInputChannels() const override { return 2; }
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int GetNumOutputChannels() const override { return 2; }
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bool ProgramsAreChunks() const override { return true; }
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ChunkData GetChunk(bool) override;
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void SetChunk(const ChunkData &chunk, bool) override;
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protected:
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void RecalculateEchoParams();
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};
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OPENMPT_NAMESPACE_END
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#endif // NO_PLUGINS
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