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#rnx #rb none #ROBOMERGE-OWNER: ryan.durand #ROBOMERGE-AUTHOR: ryan.durand #ROBOMERGE-SOURCE: CL 10869210 via CL 10869511 via CL 10869900 #ROBOMERGE-BOT: (v613-10869866) [CL 10870549 by ryan durand in Main branch]
69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "DSP/Encoders/IAudioEncoder.h"
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#if !PLATFORM_TVOS
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class FOpusEncoderPrivateState;
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class FOggEncapsulator;
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// Possible frame sizes to use for the encoder.
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enum class EOpusFrameSizes : uint8
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{
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Min, // 2.5 milliseconds
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Small, // 5 milliseconds
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MediumLow, // 10 milliseconds
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MediumHigh, // 20 milliseconds
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High, // 40 milliseconds
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Max, // 60 milliseconds
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};
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enum class EOpusMode : uint8
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{
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File, // Use this when encoding a .opus file. Pushes the Opus frames into Ogg packets.
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AudioStream, // Use this for general music and non-speech streaming applications.
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VoiceStream // Use this for Voice-specific applications.
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};
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class FOpusEncoder : public Audio::IAudioEncoder
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{
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public:
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FOpusEncoder(const FSoundQualityInfo& InInfo, int32 AverageBufferCallbackSize, EOpusFrameSizes InFrameSize = EOpusFrameSizes::MediumLow, EOpusMode InMode = EOpusMode::File);
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~FOpusEncoder();
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virtual int32 GetCompressedPacketSize() const override;
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protected:
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virtual int64 SamplesRequiredPerEncode() const override;
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virtual bool StartFile(const FSoundQualityInfo& InQualityInfo, TArray<uint8>& OutFileStart) override;
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virtual bool EncodeChunk(const TArray<float>& InAudio, TArray<uint8>& OutBytes) override;
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virtual bool EndFile(TArray<uint8>& OutBytes) override;
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private:
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FOpusEncoder();
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int32 GetNumSamplesForEncode(EOpusFrameSizes InFrameSize) const;
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int32 GetNumSamplesForPreskip();
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int32 LastValidFrameSize;
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int32 NumChannels;
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int32 SampleRate;
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int32 UncompressedFrameSize;
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// Private state so that we don't have a public dependency on opus libraries.
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// Uniquely owned by this instance. Only a raw pointer because the destructor is not accessible.
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FOpusEncoderPrivateState* PrivateOpusState;
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// Private state. Only used if we are generating a .opus file, which are ogg encapsulations of an opus stream.
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FOggEncapsulator* PrivateOggEncapsulator;
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// Used for .opus files only:
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uint32 GranulePos;
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uint32 PacketIndex;
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};
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#endif // !PLATFORM_TVOS
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