Initial community commit

Src/external_dependencies/openmpt-trunk/soundlib/plugins/DigiBoosterEcho.h

@@ -0,0 +1,126 @@
+/*
+ * DigiBoosterEcho.h
+ * -----------------
+ * Purpose: Implementation of the DigiBooster Pro Echo DSP
+ * 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
+
+class DigiBoosterEcho final : public IMixPlugin
+{
+public:
+	enum Parameters
+	{
+		kEchoDelay = 0,
+		kEchoFeedback,
+		kEchoMix,
+		kEchoCross,
+		kEchoNumParameters
+	};
+
+	// Our settings chunk for file I/O, as it will be written to files
+	struct PluginChunk
+	{
+		char  id[4];
+		uint8 param[kEchoNumParameters];
+
+		static PluginChunk Create(uint8 delay, uint8 feedback, uint8 mix, uint8 cross)
+		{
+			static_assert(sizeof(PluginChunk) == 8);
+			PluginChunk result;
+			memcpy(result.id, "Echo", 4);
+			result.param[kEchoDelay] = delay;
+			result.param[kEchoFeedback] = feedback;
+			result.param[kEchoMix] = mix;
+			result.param[kEchoCross] = cross;
+			return result;
+		}
+		static PluginChunk Default()
+		{
+			return Create(80, 150, 80, 255);
+		}
+	};
+
+protected:
+	std::vector<float> m_delayLine;  // Echo delay line
+	uint32 m_bufferSize = 0;         // Delay line length in frames
+	uint32 m_writePos = 0;           // Current write position in the delay line
+	uint32 m_delayTime = 0;          // In frames
+	uint32 m_sampleRate = 0;
+
+	// Echo calculation coefficients
+	float m_PMix, m_NMix;
+	float m_PCrossPBack, m_PCrossNBack;
+	float m_NCrossPBack, m_NCrossNBack;
+
+	// Settings chunk for file I/O
+	PluginChunk m_chunk;
+
+public:
+	static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
+	DigiBoosterEcho(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
+
+	void Release() override { delete this; }
+	void SaveAllParameters() override;
+	void RestoreAllParameters(int32 program) override;
+	int32 GetUID() const override { int32le id; memcpy(&id, "Echo", 4); return id; }
+	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 kEchoNumParameters; }
+	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("Echo"); }
+
+	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; }
+
+	bool ProgramsAreChunks() const override { return true; }
+	ChunkData GetChunk(bool) override;
+	void SetChunk(const ChunkData &chunk, bool) override;
+
+protected:
+	void RecalculateEchoParams();
+};
+
+OPENMPT_NAMESPACE_END
+
+#endif // NO_PLUGINS