AudioCaptureWasapi.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "AudioCaptureCore.h"
#include "AudioCaptureDeviceInterface.h"
#include "WasapiStreamManager.h"
 
 
namespace Audio
{
    class FAudioCaptureWasapiStream : public IAudioCaptureStream
    {
    public:
        FAudioCaptureWasapiStream();
 
        // Begin IAudioCaptureStream overrides
        virtual bool GetCaptureDeviceInfo(FCaptureDeviceInfo& OutInfo, int32 DeviceIndex) override;
 
        virtual bool OpenAudioCaptureStream(const FAudioCaptureDeviceParams& InParams, FOnAudioCaptureFunction InOnCapture, uint32 NumFramesDesired) override;
        
        virtual bool CloseStream() override;
 
        virtual bool StartStream() override;
 
        virtual bool StopStream() override;
 
        virtual bool AbortStream() override;
 
        virtual bool GetStreamTime(double& OutStreamTime) override;
 
        virtual int32 GetSampleRate() const override { return SampleRate; }
 
        virtual bool IsStreamOpen() const override;
 
        virtual bool IsCapturing() const override;
 
        virtual void OnAudioCapture(void* InBuffer, uint32 InBufferFrames, double StreamTime, bool bOverflow) override;
 
        virtual bool GetInputDevicesAvailable(TArray<FCaptureDeviceInfo>& OutDevices) override;
        // End IAudioCaptureStream overrides
 
    private:
        FOnAudioCaptureFunction OnCapture;
        int32 NumChannels = InvalidDeviceChannelCount;
        int32 SampleRate = InvalidDeviceSampleRate;
        FWasapiStreamManager CaptureDevice;
 
        static bool GetAudioFormatFromCaptureParams(
            const FAudioCaptureDeviceParams& InParams, 
            const FWasapiDeviceEnumeration::FDeviceInfo& InDeviceInfo,
            FWasapiAudioFormat& OutAudioFormat);
    };
}