AuroraRuntime/Source/Compression/Compressors/ZSTDDecompressor.hpp
Reece Wilson 07fd9f19f8 [+] NewProtocolStackFromPipe([...], bool bAutoTick)
[+] IOPipeRequestAIO::uStartOffset
[*] Fix Zstd frames being finicky
[*] Fix compression interceptor invalid weak reference to pipe that
[*] Fix WinFileStream::GetOffset using wrong enumeration
[*] Null ByteBuffer flags on init bc not all operators and constructors account for them
[will prevent bugs in the future]
2022-11-07 13:34:28 +00:00

114 lines
3.2 KiB
C++

/***
Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: ZSTDDecompressor.hpp
Date: 2022-2-15
Author: Reece
***/
#pragma once
#include "zstd.h"
namespace Aurora::Compression
{
struct ZSTDInflate : BaseStream
{
DecompressInfo meta;
ZSTDInflate(const DecompressInfo &meta) : meta(meta), BaseStream(meta.uInternalStreamSize)
{}
~ZSTDInflate()
{
if (auto dctx = AuExchange(this->dctx_, {}))
{
ZSTD_freeDCtx(dctx);
}
}
bool Init(const AuSPtr<IO::IStreamReader> &pReader) override
{
this->pReader_ = pReader;
this->dctx_ = ZSTD_createDCtx();
if (!this->IsValid())
{
SysPushErrorMem();
return false;
}
if (!this->dctx_)
{
SysPushErrorGen("Couldn't create decompressor");
return false;
}
this->pIterator_ = this->din_;
this->uAvailableIn_ = 0;
SetArray(this->din_);
return true;
}
AuStreamReadWrittenPair_t Ingest_s(AuUInt32 input) override
{
AuUInt32 uLength = AuUInt32(ZSTD_DStreamInSize());
AuUInt32 uOutFrameLength = AuUInt32(ZSTD_DStreamOutSize());
AuUInt32 done {}, read {};
if (!this->pReader_)
{
return {};
}
while (read < input)
{
read += IngestForInPointer<char, AuUInt32>(this->pReader_, this->pIterator_, this->uAvailableIn_, input - read);
if (!this->uAvailableIn_)
{
return {read, done};
}
this->input_ = ZSTD_inBuffer {this->pIterator_, this->uAvailableIn_, 0};
while (this->input_.pos < this->input_.size)
{
ZSTD_outBuffer output = {this->dout_, uOutFrameLength, 0};
auto ret = ZSTD_decompressStream(this->dctx_, &output, &this->input_);
if (ZSTD_isError(ret))
{
SysPushErrorIO("Decompression error: {}", ZSTD_getErrorName(ret));
this->uAvailableIn_ -= AuUInt32(output.pos);
this->pReader_.reset();
return AuMakePair(read, 0);
}
done += AuUInt32(output.pos);
if (!Write(reinterpret_cast<const AuUInt8 *>(output.dst),
AuUInt32(output.pos)))
{
this->pReader_.reset();
return AuMakePair(read, 0);
}
}
this->uAvailableIn_ -= AuUInt32(this->input_.pos);
}
return {read, done};
}
private:
AuSPtr<IO::IStreamReader> pReader_;
ZSTD_DCtx *dctx_ {};
char din_[ZSTD_BLOCKSIZE_MAX + 3 /*ZSTD_BLOCKHEADERSIZE*/];
char dout_[ZSTD_BLOCKSIZE_MAX];
char *pIterator_ {};
AuUInt32 uAvailableIn_ {};
ZSTD_inBuffer input_;
};
}