55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
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// Part of SAASound copyright 1998-2018 Dave Hooper <dave@beermex.com>
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//
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// SAANoise.h: interface for the CSAANoise class.
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//
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//////////////////////////////////////////////////////////////////////
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#ifndef SAANOISE_H_INCLUDED
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#define SAANOISE_H_INCLUDED
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class CSAANoise
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{
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private:
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unsigned long m_nCounter;
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unsigned long m_nAdd;
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unsigned long m_nCounter_low;
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unsigned int m_nOversample;
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unsigned long m_nCounterLimit_low;
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bool m_bSync; // see description of "SYNC" bit of register 28
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unsigned long m_nSampleRate; // = 44100 when RateMode=0, for example
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int m_nSourceMode;
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unsigned long m_nAddBase; // nAdd for 31.25 kHz noise at 44.1 kHz samplerate
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// pseudo-random number generator
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unsigned long m_nRand;
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void ChangeLevel(void);
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public:
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CSAANoise();
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CSAANoise(unsigned long seed);
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~CSAANoise();
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void SetSource(int nSource);
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void Trigger(void);
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void _SetSampleRate(int nSampleRate);
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void _SetOversample(unsigned int oversample);
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void _SetClockRate(int nClockRate);
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void Seed(unsigned long seed);
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void Tick(void);
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int Level(void) const;
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void Sync(bool bSync);
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};
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inline int CSAANoise::Level(void) const
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{
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// returns 0 or 1
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return (m_nRand & 0x00000001);
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}
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#endif // SAANOISE_H_INCLUDED
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