WinAudio.h

#pragma once
#define WIN32_LEAN_AND_MEAN //Reduce compile time of windows.h
#include <windows.h>
#include <mmsystem.h>
#include <cstdint>
#undef min
#undef max

class WinAudio {
public:
  static const int NUM_AUDIO_BUFFS = 5;
  static const int AUDIO_BUFF_SIZE = 4096;
  static WinAudio* WIN_AUDIO;

  struct Chunk {
    int16_t* samples;
    size_t sampleCount;
  };

  WinAudio(HWND handle, int sample_rate);
  ~WinAudio();

  bool play();
  bool stop();
  virtual bool onGetData(Chunk& data)=0;

protected:
  static void CALLBACK Callback(HWAVEOUT hWaveOut, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2);
  void SubmitBuffer();

  //Wave properties
  HWAVEOUT     m_HWaveOut;
  HANDLE       m_Mutex;
  WAVEFORMATEX m_Format;
  WAVEHDR      m_WaveOutHdr[NUM_AUDIO_BUFFS];
  int16_t      m_WaveOut[NUM_AUDIO_BUFFS][AUDIO_BUFF_SIZE];
  int          m_CurWaveOut;
  int          m_SampleRate;
  bool         m_IsReleasing;
};