Initial community commit

Src/external_dependencies/openmpt-trunk/sounddsp/DSP.h

@@ -0,0 +1,142 @@
+/*
+ * DSP.h
+ * -----
+ * Purpose: Mixing code for various DSPs (EQ, Mega-Bass, ...)
+ * Notes  : Ugh... This should really be removed at some point.
+ * Authors: Olivier Lapicque
+ *          OpenMPT Devs
+ * The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
+ */
+
+
+#pragma once
+
+#include "openmpt/all/BuildSettings.hpp"
+
+
+OPENMPT_NAMESPACE_BEGIN
+
+
+#ifndef NO_DSP
+
+// Buffer Sizes
+#define SURROUNDBUFFERSIZE		2048	// 50ms @ 48kHz
+
+
+class CSurroundSettings
+{
+public:
+	uint32 m_nProLogicDepth;
+	uint32 m_nProLogicDelay;
+public:
+	CSurroundSettings();
+};
+
+
+class CMegaBassSettings
+{
+public:
+	uint32 m_nXBassDepth;
+	uint32 m_nXBassRange;
+public:
+	CMegaBassSettings();
+};
+
+
+struct BitCrushSettings
+{
+	int m_Bits;
+	BitCrushSettings();
+};
+
+
+class CSurround
+{
+public:
+	CSurroundSettings m_Settings;
+
+	// Surround Encoding: 1 delay line + low-pass filter + high-pass filter
+	int32 nSurroundSize;
+	int32 nSurroundPos;
+	int32 nDolbyDepth;
+
+	// Surround Biquads
+	int32 nDolbyHP_Y1;
+	int32 nDolbyHP_X1;
+	int32 nDolbyLP_Y1;
+	int32 nDolbyHP_B0;
+	int32 nDolbyHP_B1;
+	int32 nDolbyHP_A1;
+	int32 nDolbyLP_B0;
+	int32 nDolbyLP_B1;
+	int32 nDolbyLP_A1;
+
+	int32 SurroundBuffer[SURROUNDBUFFERSIZE];
+
+public:
+	CSurround();
+public:
+	void SetSettings(const CSurroundSettings &settings) { m_Settings = settings; }
+	// [XBass level 0(quiet)-100(loud)], [cutoff in Hz 10-100]
+	bool SetXBassParameters(uint32 nDepth, uint32 nRange);
+	// [Surround level 0(quiet)-100(heavy)] [delay in ms, usually 5-40ms]
+	void SetSurroundParameters(uint32 nDepth, uint32 nDelay);
+	void Initialize(bool bReset, DWORD MixingFreq);
+	void Process(int * MixSoundBuffer, int * MixRearBuffer, int count, uint32 nChannels);
+private:
+	void ProcessStereoSurround(int * MixSoundBuffer, int count);
+	void ProcessQuadSurround(int * MixSoundBuffer, int * MixRearBuffer, int count);
+};
+
+
+
+class CMegaBass
+{
+public:
+	CMegaBassSettings m_Settings;
+
+	// Bass Expansion: low-pass filter
+	int32 nXBassFlt_Y1;
+	int32 nXBassFlt_X1;
+	int32 nXBassFlt_B0;
+	int32 nXBassFlt_B1;
+	int32 nXBassFlt_A1;
+
+	// DC Removal Biquad
+	int32 nDCRFlt_Y1lf;
+	int32 nDCRFlt_X1lf;
+	int32 nDCRFlt_Y1rf;
+	int32 nDCRFlt_X1rf;
+	int32 nDCRFlt_Y1lb;
+	int32 nDCRFlt_X1lb;
+	int32 nDCRFlt_Y1rb;
+	int32 nDCRFlt_X1rb;
+
+public:
+	CMegaBass();
+public:
+	void SetSettings(const CMegaBassSettings &settings) { m_Settings = settings; }
+	// [XBass level 0(quiet)-100(loud)], [cutoff in Hz 10-100]
+	void SetXBassParameters(uint32 nDepth, uint32 nRange);
+	void Initialize(bool bReset, DWORD MixingFreq);
+	void Process(int * MixSoundBuffer, int * MixRearBuffer, int count, uint32 nChannels);
+};
+
+
+class BitCrush
+{
+public:
+	BitCrushSettings m_Settings;
+public:
+	BitCrush();
+public:
+	void SetSettings(const BitCrushSettings &settings) { m_Settings = settings; }
+	void Initialize(bool bReset, DWORD MixingFreq);
+	void Process(int * MixSoundBuffer, int * MixRearBuffer, int count, uint32 nChannels);
+};
+
+
+#endif // NO_DSP
+
+
+OPENMPT_NAMESPACE_END