WasapiAudioFormat.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Windows/AllowWindowsPlatformTypes.h"
#include "Windows/AllowWindowsPlatformAtomics.h"
 
THIRD_PARTY_INCLUDES_START
#include <AudioClient.h>
THIRD_PARTY_INCLUDES_END
 
#include "Windows/HideWindowsPlatformAtomics.h"
#include "Windows/HideWindowsPlatformTypes.h"
 
#define UE_API AUDIOPLATFORMSUPPORTWASAPI_API
 
 
namespace Audio
{
    enum class EWasapiAudioEncoding : uint8
    {
        UNKNOWN,
        PCM_8,
        PCM_16,
        PCM_24,
        PCM_24_IN_32,
        PCM_32,
        FLOATING_POINT_32,
        FLOATING_POINT_64
    };
 
    class FWasapiAudioFormat
    {
    public:
        UE_API FWasapiAudioFormat();
 
        UE_API explicit FWasapiAudioFormat(WAVEFORMATEX* InFormat);
 
        UE_API FWasapiAudioFormat(uint16 InChannels, uint32 InSampleRate, EWasapiAudioEncoding InEncoding);
 
        UE_API EWasapiAudioEncoding GetEncoding() const;
 
        UE_API uint32 GetNumChannels() const;
 
        UE_API uint32 GetSampleRate() const;
 
        UE_API uint32 GetBitsPerSample() const;
 
        UE_API uint32 GetBytesPerSample() const;
 
        UE_API uint32 GetFrameSizeInBytes() const;
        
        UE_API FString GetEncodingString() const;
 
        UE_API const WAVEFORMATEX* GetWaveFormat() const;
 
    private:
 
        void InitAudioFormat(uint16 InChannels, uint32 InSampleRate, EWasapiAudioEncoding InEncoding);
        void InitAudioEncoding();
        static EWasapiAudioEncoding DetermineAudioEncoding(const WAVEFORMATEXTENSIBLE& InFormat);
        static uint16 EncodingToBitDepth(EWasapiAudioEncoding InEncoding);
 
        WAVEFORMATEXTENSIBLE WaveFormat = {};
        EWasapiAudioEncoding Encoding = EWasapiAudioEncoding::UNKNOWN;
    };
}
 
#undef UE_API