windows checkpoint

src/synth/AudioEngine.h

@@ -0,0 +1,31 @@
+
+#pragma once
+
+#include <RtAudio.h>
+#include <stdint.h>
+#include <atomic>
+
+class AudioEngine {
+
+public:
+    AudioEngine();
+    ~AudioEngine();
+
+    bool start();
+    void stop();
+
+    void setFrequency(float freq);
+
+private: 
+    static int32_t audioCallback(void* outputBuffer, void* inputBuffer, uint32_t nFrames, double streamTime, RtAudioStreamStatus status, void* userData);
+    int32_t process(float* out, uint32_t nFrames);
+
+    RtAudio audio_;
+    uint32_t sampleRate_ = 44100;
+    uint32_t bufferFrames_ = 256;
+
+    std::atomic<float> targetFreq_{ 400.0f };
+    float currentFreq_ = 440.0f;
+    float phase_ = 0.0f;
+
+};