IAudioEncoder.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "DSP/Dsp.h"
#include "Interfaces/IAudioFormat.h"
 
namespace Audio
{
    class IAudioEncoder
    {
    public:
        SIGNALPROCESSING_API IAudioEncoder(uint32 AudioBufferSlack, uint32 DataBufferSlack = 4096);
        SIGNALPROCESSING_API virtual ~IAudioEncoder();
 
        SIGNALPROCESSING_API bool PushAudio(const float* InBuffer, int32 NumSamples, bool bEncodeIfPossible = true);
 
        SIGNALPROCESSING_API int32 PopData(uint8* OutData, int32 DataSize);
 
        virtual int32 GetCompressedPacketSize() const = 0;
 
        SIGNALPROCESSING_API bool EncodeIfPossible();
 
        SIGNALPROCESSING_API int64 Finalize();
 
    protected:
        SIGNALPROCESSING_API void Init(const FSoundQualityInfo& InQualityInfo);
 
        virtual int64 SamplesRequiredPerEncode() const = 0;
 
        virtual bool StartFile(const FSoundQualityInfo& InQualityInfo, TArray<uint8>& OutFileStart) = 0;
 
        virtual bool EncodeChunk(const TArray<float>& InAudio, TArray<uint8>& OutBytes) = 0;
 
        virtual bool EndFile(TArray<uint8>& OutBytes) = 0;
 
    private:
        SIGNALPROCESSING_API IAudioEncoder();
 
        TArray<float> CurrentAudioBuffer;
        TArray<uint8> CurrentCompressedBuffer;
 
        TCircularAudioBuffer<float> UncompressedAudioBuffer;
        TCircularAudioBuffer<uint8> CompressedDataBuffer;
    };
}