106 lines
2.3 KiB
C++
Executable File
106 lines
2.3 KiB
C++
Executable File
#pragma once
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#include <algorithm>
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#include <cmath>
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#include <cstdint>
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#include <iterator>
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#include <memory>
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#include <string>
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#include <vector>
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using std::shared_ptr;
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using std::vector;
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using std::cos;
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using std::for_each;
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using std::sin;
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class Generator {
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public:
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virtual float getSample() = 0;
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virtual void getSamples(size_t nSamples, float* buf);
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virtual float getFrequency() const;
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virtual void setFrequency(float _frequency);
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virtual bool isEnabled() const;
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virtual void enable();
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virtual void disable();
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virtual ~Generator();
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// disallow copy of virtual interface
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Generator(Generator const&) = delete;
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Generator& operator=(Generator const&) = delete;
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protected:
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Generator(uint32_t _sampleRate, float _frequency, float _amplitude);
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uint32_t sampleRate;
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float frequency;
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float amplitude;
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bool enabled;
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private:
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};
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class SineGenerator : public Generator {
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public:
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SineGenerator(uint32_t _sampleRate, float _frequency, float _amplitude);
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float getSample() final;
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void setFrequency(float _frequency) final;
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virtual ~SineGenerator();
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private:
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float instPhase;
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float phaseIncr;
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};
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class NoiseGenerator : public Generator {
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public:
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NoiseGenerator(uint32_t _sampleRate, uint8_t rate, float _amplitude);
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float getSample() final;
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virtual ~NoiseGenerator();
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uint8_t rate;
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static const uint16_t rateTable[];
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private:
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int16_t level;
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uint16_t sampleCount;
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};
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class SampleGenerator : public Generator {
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public:
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SampleGenerator(uint32_t _sampleRate, uint16_t _playbackRate, float _amplitude, size_t nSamples, const float* samples);
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SampleGenerator(uint32_t _sampleRate, uint16_t _playbackRate, float _amplitude, size_t nSamples, const int16_t* samples);
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float getSample() final;
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virtual ~SampleGenerator();
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uint16_t playbackRate;
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private:
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vector<float> sample;
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float oldest, older, old;
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uint32_t counter;
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static const uint16_t gaussTable[];
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};
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class SineSynth {
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public:
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SineSynth(uint32_t _sampleRate);
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void addSynth(shared_ptr<Generator>);
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vector<shared_ptr<Generator>> getSynths() const;
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void clearSynths();
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void getSamples(size_t nSamples, float* buf);
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private:
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uint32_t sampleRate;
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vector<shared_ptr<Generator>> generators;
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}; |