Updates
This commit is contained in:
parent
b0a7cd9fae
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d1a57b09af
7
CMakeLists.txt
Normal file → Executable file
7
CMakeLists.txt
Normal file → Executable file
@ -10,7 +10,12 @@ if(PULSEAUDIO_FOUND)
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include_directories(${PULSEAUDIO_INCLUDE_DIR})
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endif()
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set(SINESYNTH_LIBS ${PULSEAUDIO_LIBRARY} pulse-simple)
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find_package(Curses)
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if (CURSES_FOUND)
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include_directories(${CURSES_INCLUDE_DIRS})
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endif()
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set(SINESYNTH_LIBS ${PULSEAUDIO_LIBRARY} ${CURSES_LIBRARIES} pulse-simple tinfo)
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file(GLOB SOURCES "src/*.cpp")
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87
include/SineSynth.h
Normal file → Executable file
87
include/SineSynth.h
Normal file → Executable file
@ -1,20 +1,32 @@
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#pragma once
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#include <cstdint>
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#include <vector>
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#include <iterator>
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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::iterator_traits;
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using std::sin;
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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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{
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class Generator {
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public:
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virtual void getSamples(const uint16_t nSamples, float *buf) = 0;
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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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@ -26,24 +38,69 @@ protected:
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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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{
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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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void getSamples(uint16_t nSamples, float *buf) final;
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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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uint32_t tick;
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float instPhase;
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float phaseIncr;
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};
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class SineSynth
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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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vector<SineGenerator> generators;
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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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};
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202
src/SineSynth.cpp
Normal file → Executable file
202
src/SineSynth.cpp
Normal file → Executable file
@ -2,27 +2,195 @@
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#include <iostream>
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Generator::Generator(uint32_t _sampleRate, float _frequency, float _amplitude) : sampleRate(_sampleRate), frequency(_frequency), amplitude(_amplitude)
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Generator::Generator(uint32_t _sampleRate, float _frequency, float _amplitude)
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: sampleRate(_sampleRate)
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, frequency(_frequency)
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, amplitude(_amplitude)
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, enabled(false)
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{
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}
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Generator::~Generator()
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Generator::~Generator() {}
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void Generator::getSamples(size_t nSamples, float* buf)
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{
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}
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SineGenerator::SineGenerator(uint32_t _sampleRate, float _frequency, float _amplitude = 1) : Generator(_sampleRate, _frequency, _amplitude), tick(0) {
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phaseIncr = 2 * M_PI * frequency / sampleRate;
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std::cout << "Constructed SineGenerator with freq " << frequency << " phaseIncr " << phaseIncr << std::endl;
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}
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SineGenerator::~SineGenerator() {
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}
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void SineGenerator::getSamples(uint16_t nSamples, float *buf) {
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for (; nSamples > 0; nSamples--) {
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std::cout << "Generating tick " << tick << std::endl;
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*buf++ = cos(phaseIncr * tick++) * amplitude;
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*buf++ = getSample();
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}
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}
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float Generator::getFrequency() const { return frequency; }
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void Generator::setFrequency(float _frequency) { frequency = _frequency; }
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bool Generator::isEnabled() const { return enabled; }
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void Generator::enable() { enabled = true; }
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void Generator::disable() { enabled = false; }
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SineGenerator::SineGenerator(
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uint32_t _sampleRate, float _frequency, float _amplitude = 1)
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: Generator(_sampleRate, _frequency, _amplitude)
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, instPhase(0)
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{
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setFrequency(_frequency);
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enable();
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std::cout << "Constructed SineGenerator with freq " << frequency
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<< " phaseIncr " << phaseIncr << std::endl;
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}
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SineGenerator::~SineGenerator() {}
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float SineGenerator::getSample()
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{
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if (instPhase > 2 * M_PI)
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instPhase -= 2 * M_PI;
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return cos(instPhase += phaseIncr) * amplitude;
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}
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void SineGenerator::setFrequency(float _frequency)
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{
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frequency = _frequency;
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phaseIncr = 2 * M_PI * frequency / sampleRate;
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}
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SineSynth::SineSynth(uint32_t _sampleRate)
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: sampleRate(_sampleRate)
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{
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}
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void SineSynth::addSynth(shared_ptr<Generator> synth)
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{
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generators.push_back(synth);
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}
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vector<shared_ptr<Generator>> SineSynth::getSynths() const
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{
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return generators;
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}
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void SineSynth::clearSynths() { generators.resize(0); }
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void SineSynth::getSamples(size_t nSamples, float* buf)
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{
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for (; nSamples > 0; nSamples--) {
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*buf = 0;
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for_each(std::begin(generators), std::end(generators),
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[buf](std::shared_ptr<Generator> g) {
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if (g->isEnabled())
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*buf += g->getSample();
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});
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buf++;
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}
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}
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const uint16_t NoiseGenerator::rateTable[]
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= { 0, 2048, 1536, 1280, 1024, 768, 640, 512, 384, 320, 256, 192, 160, 128,
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96, 80, 64, 48, 40, 32, 24, 20, 16, 12, 10, 8, 6, 5, 4, 3, 2, 1 };
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NoiseGenerator::NoiseGenerator(
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uint32_t _sampleRate, uint8_t _rate, float _amplitude)
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: Generator(_sampleRate, 0, _amplitude)
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, level(-0x4000)
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, sampleCount(0)
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, rate(_rate)
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{
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enable();
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}
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NoiseGenerator::~NoiseGenerator() {}
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float NoiseGenerator::getSample()
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{
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if (rate == 0)
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return 0;
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if (sampleCount++ % rateTable[rate] == 0) {
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auto retLevel = level;
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level = ((level >> 1) & 0x3fff)
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| (((level & 0x01) ^ ((level & 0x02) >> 1)) << 14);
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return (retLevel / 32768.0f) * amplitude;
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}
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return (level / 32768.0f) * amplitude;
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}
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const uint16_t SampleGenerator::gaussTable[] = { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x1, 0x1, 0x1, 0x1,
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0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x3, 0x3,
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0x3, 0x3, 0x3, 0x4, 0x4, 0x4, 0x4, 0x4, 0x5, 0x5, 0x5, 0x5, 0x6, 0x6, 0x6,
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0x6, 0x7, 0x7, 0x7, 0x8, 0x8, 0x8, 0x9, 0x9, 0x9, 0xa, 0xa, 0xa, 0xb, 0xb,
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0xb, 0xc, 0xc, 0xd, 0xd, 0xe, 0xe, 0xf, 0xf, 0xf, 0x10, 0x10, 0x11, 0x11,
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0x12, 0x13, 0x13, 0x14, 0x14, 0x15, 0x15, 0x16, 0x17, 0x17, 0x18, 0x18,
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0x19, 0x1a, 0x1b, 0x1b, 0x1c, 0x1d, 0x1d, 0x1e, 0x1f, 0x20, 0x20, 0x21,
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0x22, 0x23, 0x24, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c,
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0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
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0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x40, 0x41, 0x42, 0x43, 0x45, 0x46, 0x47,
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0x49, 0x4a, 0x4c, 0x4d, 0x4e, 0x50, 0x51, 0x53, 0x54, 0x56, 0x57, 0x59,
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0x5a, 0x5c, 0x5e, 0x5f, 0x61, 0x63, 0x64, 0x66, 0x68, 0x6a, 0x6b, 0x6d,
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0x6f, 0x71, 0x73, 0x75, 0x76, 0x78, 0x7a, 0x7c, 0x7e, 0x80, 0x82, 0x84,
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0x86, 0x89, 0x8b, 0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9a, 0x9c, 0x9f,
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0xa1, 0xa3, 0xa6, 0xa8, 0xab, 0xad, 0xaf, 0xb2, 0xb4, 0xb7, 0xba, 0xbc,
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0xbf, 0xc1, 0xc4, 0xc7, 0xc9, 0xcc, 0xcf, 0xd2, 0xd4, 0xd7, 0xda, 0xdd,
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0xe0, 0xe3, 0xe6, 0xe9, 0xec, 0xef, 0xf2, 0xf5, 0xf8, 0xfb, 0xfe, 0x101,
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0x104, 0x107, 0x10b, 0x10e, 0x111, 0x114, 0x118, 0x11b, 0x11e, 0x122, 0x125,
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0x129, 0x12c, 0x130, 0x133, 0x137, 0x13a, 0x13e, 0x141, 0x145, 0x148, 0x14c,
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0x150, 0x153, 0x157, 0x15b, 0x15f, 0x162, 0x166, 0x16a, 0x16e, 0x172, 0x176,
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0x17a, 0x17d, 0x181, 0x185, 0x189, 0x18d, 0x191, 0x195, 0x19a, 0x19e, 0x1a2,
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0x1a6, 0x1aa, 0x1ae, 0x1b2, 0x1b7, 0x1bb, 0x1bf, 0x1c3, 0x1c8, 0x1cc, 0x1d0,
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0x1d5, 0x1d9, 0x1dd, 0x1e2, 0x1e6, 0x1eb, 0x1ef, 0x1f3, 0x1f8, 0x1fc, 0x201,
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0x205, 0x20a, 0x20f, 0x213, 0x218, 0x21c, 0x221, 0x226, 0x22a, 0x22f, 0x233,
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0x238, 0x23d, 0x241, 0x246, 0x24b, 0x250, 0x254, 0x259, 0x25e, 0x263, 0x267,
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0x26c, 0x271, 0x276, 0x27b, 0x280, 0x284, 0x289, 0x28e, 0x293, 0x298, 0x29d,
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0x2a2, 0x2a6, 0x2ab, 0x2b0, 0x2b5, 0x2ba, 0x2bf, 0x2c4, 0x2c9, 0x2ce, 0x2d3,
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0x2d8, 0x2dc, 0x2e1, 0x2e6, 0x2eb, 0x2f0, 0x2f5, 0x2fa, 0x2ff, 0x304, 0x309,
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0x30e, 0x313, 0x318, 0x31d, 0x322, 0x326, 0x32b, 0x330, 0x335, 0x33a, 0x33f,
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0x344, 0x349, 0x34e, 0x353, 0x357, 0x35c, 0x361, 0x366, 0x36b, 0x370, 0x374,
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0x379, 0x37e, 0x383, 0x388, 0x38c, 0x391, 0x396, 0x39b, 0x39f, 0x3a4, 0x3a9,
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0x3ad, 0x3b2, 0x3b7, 0x3bb, 0x3c0, 0x3c5, 0x3c9, 0x3ce, 0x3d2, 0x3d7, 0x3dc,
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0x3e0, 0x3e5, 0x3e9, 0x3ed, 0x3f2, 0x3f6, 0x3fb, 0x3ff, 0x403, 0x408, 0x40c,
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0x410, 0x415, 0x419, 0x41d, 0x421, 0x425, 0x42a, 0x42e, 0x432, 0x436, 0x43a,
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0x43e, 0x442, 0x446, 0x44a, 0x44e, 0x452, 0x455, 0x459, 0x45d, 0x461, 0x465,
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0x468, 0x46c, 0x470, 0x473, 0x477, 0x47a, 0x47e, 0x481, 0x485, 0x488, 0x48c,
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0x48f, 0x492, 0x496, 0x499, 0x49c, 0x49f, 0x4a2, 0x4a6, 0x4a9, 0x4ac, 0x4af,
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0x4b2, 0x4b5, 0x4b7, 0x4ba, 0x4bd, 0x4c0, 0x4c3, 0x4c5, 0x4c8, 0x4cb, 0x4cd,
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0x4d0, 0x4d2, 0x4d5, 0x4d7, 0x4d9, 0x4dc, 0x4de, 0x4e0, 0x4e3, 0x4e5, 0x4e7,
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0x4e9, 0x4eb, 0x4ed, 0x4ef, 0x4f1, 0x4f3, 0x4f5, 0x4f6, 0x4f8, 0x4fa, 0x4fb,
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0x4fd, 0x4ff, 0x500, 0x502, 0x503, 0x504, 0x506, 0x507, 0x508, 0x50a, 0x50b,
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0x50c, 0x50d, 0x50e, 0x50f, 0x510, 0x511, 0x511, 0x512, 0x513, 0x514, 0x514,
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0x515, 0x516, 0x516, 0x517, 0x517, 0x517, 0x518, 0x518, 0x518, 0x518, 0x518,
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0x519, 0x519 };
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SampleGenerator::SampleGenerator(uint32_t _sampleRate, uint16_t _playbackRate,
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float _amplitude, size_t nSamples, const float* samples)
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: Generator(_sampleRate, 0, _amplitude)
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, playbackRate(_playbackRate)
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, counter(0)
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{
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oldest = older = old = 0;
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enable();
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sample.resize(nSamples);
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for (auto i = std::begin(sample); i != std::end(sample); i++)
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*i = *samples++;
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}
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SampleGenerator::~SampleGenerator() {}
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float SampleGenerator::getSample()
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{
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counter += playbackRate;
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if ((counter >> 12) > sample.size())
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counter &= 0xfff;
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auto gaussIndex = (counter >> 4) & 0x3f;
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float out = ((gaussTable[0xff - gaussIndex] / 32768.0f * oldest) / 1024);
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out += ((gaussTable[0x1ff - gaussIndex] / 32768.0f * older) / 1024);
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out += ((gaussTable[0x100 + gaussIndex] / 32768.0f * old) / 1024);
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out += ((gaussTable[0x000 + gaussIndex] / 32768.0f * sample[counter>>12]) / 1024);
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out /= 2;
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oldest = older;
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older = old;
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old = sample[counter>>12];
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return out * amplitude;
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}
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211
src/main.cpp
Normal file → Executable file
211
src/main.cpp
Normal file → Executable file
@ -1,23 +1,208 @@
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#include <cmath>
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#include <iostream>
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#include <memory>
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#include <string>
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#include <curses.h>
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#include <pulse/error.h>
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#include <pulse/simple.h>
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#include "SineSynth.h"
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int main(int argc, char *argv[]) {
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SineGenerator sg(44100, 440.0f, 0.1);
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static const pa_sample_spec ss = {
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.format = PA_SAMPLE_FLOAT32,
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.rate = 44100,
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.channels = 1
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};
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WINDOW* win;
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pa_simple *s = NULL;
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int error;
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s = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error);
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constexpr int SAMPLERATE = 32000;
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constexpr size_t BUFSIZE = 64;
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float buf[1024];
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for (;;) {
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sg.getSamples(1024, buf);
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void majorChord(SineSynth& synth, const double root)
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{
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wprintw(win, "majorChord root: %f\n", root);
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if (synth.getSynths().size() != 3) {
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synth.clearSynths();
|
||||
auto sg = std::make_shared<SineGenerator>(SAMPLERATE, root, 0.1);
|
||||
synth.addSynth(sg);
|
||||
sg = std::make_shared<SineGenerator>(
|
||||
SAMPLERATE, root * pow(2, 4.0 / 12.0), 0.1);
|
||||
synth.addSynth(sg);
|
||||
sg = std::make_shared<SineGenerator>(
|
||||
SAMPLERATE, root * pow(2, 7.0 / 12.0), 0.1);
|
||||
synth.addSynth(sg);
|
||||
} else {
|
||||
auto synths = synth.getSynths();
|
||||
synths[0]->setFrequency(root);
|
||||
synths[1]->setFrequency(root * pow(2, 4.0 / 12.0));
|
||||
synths[2]->setFrequency(root * pow(2, 7.0 / 12.0));
|
||||
}
|
||||
}
|
||||
|
||||
void minorChord(SineSynth& synth, const double root)
|
||||
{
|
||||
wprintw(win, "minorChord root: %f\n", root);
|
||||
if (synth.getSynths().size() != 3) {
|
||||
synth.clearSynths();
|
||||
auto sg = std::make_shared<SineGenerator>(SAMPLERATE, root, 0.1);
|
||||
synth.addSynth(sg);
|
||||
sg = std::make_shared<SineGenerator>(
|
||||
SAMPLERATE, root * pow(2, 3.0 / 12.0), 0.1);
|
||||
synth.addSynth(sg);
|
||||
sg = std::make_shared<SineGenerator>(
|
||||
SAMPLERATE, root * pow(2, 7.0 / 12.0), 0.1);
|
||||
synth.addSynth(sg);
|
||||
} else {
|
||||
auto synths = synth.getSynths();
|
||||
synths[0]->setFrequency(root);
|
||||
synths[1]->setFrequency(root * pow(2, 3.0 / 12.0));
|
||||
synths[2]->setFrequency(root * pow(2, 7.0 / 12.0));
|
||||
}
|
||||
}
|
||||
|
||||
WINDOW*
|
||||
init_curses()
|
||||
{
|
||||
WINDOW* win = initscr();
|
||||
nodelay(win, TRUE);
|
||||
keypad(win, TRUE);
|
||||
cbreak();
|
||||
|
||||
return win;
|
||||
}
|
||||
|
||||
pa_simple*
|
||||
init_pulse()
|
||||
{
|
||||
static const pa_sample_spec ss = { .format = PA_SAMPLE_FLOAT32,
|
||||
.rate = SAMPLERATE,
|
||||
.channels = 1 };
|
||||
|
||||
int error = 0;
|
||||
pa_simple* s = pa_simple_new(NULL,
|
||||
"sinesynth",
|
||||
PA_STREAM_PLAYBACK,
|
||||
NULL,
|
||||
"playback",
|
||||
&ss,
|
||||
NULL,
|
||||
NULL,
|
||||
&error);
|
||||
if (error) {
|
||||
std::cerr << "Error initializing PulseAudio: " << pa_strerror(error) << " ("
|
||||
<< error << ")" << std::endl;
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
const float testSample[] = { 0.0,
|
||||
0.0980171403295606,
|
||||
0.19509032201612825,
|
||||
0.29028467725446233,
|
||||
0.3826834323650898,
|
||||
0.47139673682599764,
|
||||
0.5555702330196022,
|
||||
0.6343932841636455,
|
||||
0.7071067811865475,
|
||||
0.773010453362737,
|
||||
0.8314696123025452,
|
||||
0.8819212643483549,
|
||||
0.9238795325112867,
|
||||
0.9569403357322089,
|
||||
0.9807852804032304,
|
||||
0.9951847266721968,
|
||||
1.0,
|
||||
0.9951847266721969,
|
||||
0.9807852804032304,
|
||||
0.9569403357322089,
|
||||
0.9238795325112867,
|
||||
0.881921264348355,
|
||||
0.8314696123025455,
|
||||
0.7730104533627371,
|
||||
0.7071067811865476,
|
||||
0.6343932841636455,
|
||||
0.5555702330196022,
|
||||
0.47139673682599786,
|
||||
0.3826834323650899,
|
||||
0.2902846772544624,
|
||||
0.1950903220161286,
|
||||
0.09801714032956083,
|
||||
1.2246467991473532e-16,
|
||||
-0.09801714032956059,
|
||||
-0.19509032201612836,
|
||||
-0.2902846772544621,
|
||||
-0.38268343236508967,
|
||||
-0.47139673682599764,
|
||||
-0.555570233019602,
|
||||
-0.6343932841636453,
|
||||
-0.7071067811865475,
|
||||
-0.7730104533627367,
|
||||
-0.8314696123025452,
|
||||
-0.8819212643483549,
|
||||
-0.9238795325112865,
|
||||
-0.9569403357322088,
|
||||
-0.9807852804032303,
|
||||
-0.9951847266721969,
|
||||
-1.0,
|
||||
-0.9951847266721969,
|
||||
-0.9807852804032304,
|
||||
-0.9569403357322089,
|
||||
-0.9238795325112866,
|
||||
-0.881921264348355,
|
||||
-0.8314696123025455,
|
||||
-0.7730104533627369,
|
||||
-0.7071067811865477,
|
||||
-0.6343932841636459,
|
||||
-0.5555702330196022,
|
||||
-0.4713967368259979,
|
||||
-0.3826834323650904,
|
||||
-0.2902846772544625,
|
||||
-0.19509032201612872,
|
||||
-0.0980171403295605 };
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
SineSynth synth(SAMPLERATE);
|
||||
auto noise = std::make_shared<NoiseGenerator>(SAMPLERATE, 0x1f, 0.1);
|
||||
//synth.addSynth(noise);
|
||||
auto sampled = std::make_shared<SampleGenerator>(SAMPLERATE, 0x1000, 0.1, sizeof(testSample)/sizeof(float), testSample);
|
||||
synth.addSynth(sampled);
|
||||
|
||||
sampled->enable();
|
||||
noise->disable();
|
||||
|
||||
auto s = init_pulse();
|
||||
auto win = init_curses();
|
||||
|
||||
mvwprintw(win, 0, 0, "Initialized\n");
|
||||
|
||||
int error = 0;
|
||||
pa_usec_t latency = pa_simple_get_latency(s, &error);
|
||||
wprintw(win,
|
||||
"Error: %s (%d) Latency: %d usec\n",
|
||||
pa_strerror(error),
|
||||
error,
|
||||
latency);
|
||||
|
||||
float buf[BUFSIZE];
|
||||
long long i;
|
||||
mvwprintw(win, 2, 0, "Loops: ");
|
||||
mvwprintw(win, 3, 0, "Rate: ");
|
||||
for (i = 0;; i++) {
|
||||
auto c = getch();
|
||||
switch (c) {
|
||||
case KEY_UP:
|
||||
sampled->playbackRate+=8;
|
||||
sampled->playbackRate &= 0x3fff;
|
||||
break;
|
||||
case KEY_DOWN:
|
||||
sampled->playbackRate-=8;
|
||||
sampled->playbackRate &= 0x3fff;
|
||||
break;
|
||||
}
|
||||
synth.getSamples(BUFSIZE, buf);
|
||||
pa_simple_write(s, buf, sizeof(buf), &error);
|
||||
mvwprintw(win, 2, 8, "%d", i);
|
||||
mvwprintw(win, 3, 7, "%2x", sampled->playbackRate);
|
||||
}
|
||||
|
||||
endwin();
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user