WasapiAggregateDeviceMgr.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "IAudioMixerWasapiDeviceManager.h"
#include "AudioMixerWasapiDeviceThread.h"
#include "AudioMixerWasapiRenderStream.h"
 
namespace Audio
{
    class FWasapiAggregateDeviceMgr : public IAudioMixerWasapiDeviceManager, public IDeviceRenderCallback
    {
    public:
 
        FWasapiAggregateDeviceMgr();
        virtual ~FWasapiAggregateDeviceMgr() = default;
 
        //~ Begin IAudioMixerWasapiDeviceManager
        virtual bool InitializeHardware(const TArray<FWasapiRenderStreamParams>& InParams, const TFunction<void()>& InCallback) override;
        virtual bool TeardownHardware() override;
        virtual bool IsInitialized() const override;
        virtual int32 GetNumDirectOutChannels() const override { return NumDirectOutChannels; }
        virtual int32 GetNumFrames(const int32 InNumRequestedFrames) const override;
        virtual bool OpenAudioStream(const TArray<FWasapiRenderStreamParams>& InParams) override;
        virtual bool CloseAudioStream() override;
        virtual bool StartAudioStream() override;
        virtual bool StopAudioStream() override;
        virtual void SubmitBuffer(const uint8* InBuffer, const SIZE_T InNumFrames) override;
        virtual void SubmitDirectOutBuffer(const int32 InDirectOutIndex, const FAlignedFloatBuffer& InBuffer) override;
        //~ End IAudioMixerWasapiDeviceManager
 
        //~ Begin IDeviceRenderCallback
        virtual void DeviceRenderCallback() override;
        //~ End IDeviceRenderCallback
 
    private:
 
        bool bIsInitialized = false;
 
        int32 NumChannelsPerDevice = 0;
 
        int32 NumDirectOutChannels = 0;
 
        TArray<TUniquePtr<FAudioMixerWasapiRenderStream>> RenderStreamDevices;
 
        TUniquePtr<FAudioMixerWasapiDeviceThread> RenderDeviceThread;
    };
 }