VoiceCodecOpus.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Interfaces/VoiceCodec.h"
#include "VoicePrivate.h"
#include "VoicePackage.h"
 
#if PLATFORM_SUPPORTS_OPUS_CODEC
 
#define NUM_ENTROPY_VALUES 5
 
class FVoiceEncoderOpus : public IVoiceEncoder
{
public:
 
    FVoiceEncoderOpus();
    ~FVoiceEncoderOpus();
 
    // IVoiceEncoder
    virtual bool Init(int32 SampleRate, int32 NumChannels, EAudioEncodeHint EncodeHint) override;
    virtual int32 Encode(const uint8* RawPCMData, uint32 RawDataSize, uint8* OutCompressedData, uint32& OutCompressedDataSize) override;
    virtual bool SetBitrate(int32 InBitRate) override;
    virtual bool SetVBR(bool bEnableVBR) override;
    virtual bool SetComplexity(int32 InComplexity) override;
    virtual void Reset() override;
    virtual void Destroy() override;
    virtual void DumpState() const override;
 
private:
 
    int32 SampleRate;
    int32 NumChannels;
    int32 FrameSize;
    struct OpusEncoder* Encoder;
    uint32 Entropy[NUM_ENTROPY_VALUES];
    uint32 LastEntropyIdx;
    uint8 Generation;
};
 
class FVoiceDecoderOpus : public IVoiceDecoder
{
public:
 
    FVoiceDecoderOpus();
    ~FVoiceDecoderOpus();
 
    //IVoiceDecoder
    virtual bool Init(int32 SampleRate, int32 NumChannels) override;
    virtual void Decode(const uint8* CompressedData, uint32 CompressedDataSize, uint8* OutRawPCMData, uint32& OutRawDataSize) override;
    virtual void Reset() override;
    virtual void Destroy() override;
    virtual void DumpState() const override;
 
private:
 
    int32 SampleRate;
    int32 NumChannels;
    int32 FrameSize;
    struct OpusDecoder* Decoder;
    uint32 Entropy[NUM_ENTROPY_VALUES];
    uint32 LastEntropyIdx;
    uint8 LastGeneration;
};
 
#endif