WinAudioMME.h

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#pragma once
#if defined(_WIN32)
#include "HephAudioShared.h"
#include "NativeAudio.h"
#include "WinAudioBase.h"
#include <mmeapi.h>
 
namespace HephAudio
{
    namespace Native
    {
        class HEPH_API WinAudioMME final : public WinAudioBase
        {
        public:
            using NativeAudio::InitializeRender;
            using NativeAudio::InitializeCapture;
 
        private:
            static constexpr uint32_t HDR_COUNT = 2;
 
        private:
            HWAVEOUT hwo;
            HWAVEIN hwi;
            WAVEHDR renderHdrs[HDR_COUNT];
            WAVEHDR captureHdrs[HDR_COUNT];
 
        public:
            WinAudioMME();
 
            WinAudioMME(const WinAudioMME&) = delete;
            WinAudioMME& operator=(const WinAudioMME&) = delete;
 
            ~WinAudioMME();
            
            void SetMasterVolume(double volume) override;
            double GetMasterVolume() const override;
            void InitializeRender(AudioDevice* device, AudioFormatInfo format);
            void StopRendering() override;
            void InitializeCapture(AudioDevice* device, AudioFormatInfo format) override;
            void StopCapturing() override;
            void GetNativeParams(NativeAudioParams& nativeParams) const override;
            void SetNativeParams(const NativeAudioParams& nativeParams) override;
        private:
            bool EnumerateAudioDevices() override;
            AudioFormatInfo GetClosestFormat(DWORD dwFormats, const AudioFormatInfo& format) const;
            static size_t CalculateBufferSize(uint32_t byteRate, uint32_t sampleRate);
            static void CALLBACK RenderCallback(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2);
            static void CALLBACK CaptureCallback(HWAVEIN hwi, UINT uMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2);
            static std::string GetErrorString(MMRESULT mmResult);
        };
    }
}
#endif