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Make compression of zstd archive type more similar to zstdcli #354

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merged 3 commits into from
Sep 17, 2023
Merged

Make compression of zstd archive type more similar to zstdcli #354

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5697b3d
zstd compression - set source size as hint if it is known e. g. by fi…
sebres Sep 14, 2023
8a5e1c8
make compression of zstd archive type more similar to Zstandard CLI (…
sebres Sep 14, 2023
1eca571
.zst, .br: avoid setting of size hint for unknown size by `-si`, sinc…
sebres Sep 14, 2023
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4 changes: 2 additions & 2 deletions C/zstdmt/brotli-mt_compress.c
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Original file line number Diff line number Diff line change
Expand Up @@ -383,7 +383,7 @@ static size_t st_compress(void *arg)
/* 0, or not specified by user; could be chosen by compressor. */
uint32_t lgwin = 24 /* DEFAULT_LGWIN */;
/* Use file size to limit lgwin. */
if (ctx->unpackSize >= 0) {
if (ctx->unpackSize >= 0 && ctx->unpackSize != (uint64_t)(int64_t)-1) {
lgwin = BROTLI_MIN_WINDOW_BITS;
while (BROTLI_MAX_BACKWARD_LIMIT(lgwin) <
(uint64_t)ctx->unpackSize) {
Expand All @@ -393,7 +393,7 @@ static size_t st_compress(void *arg)
}
BrotliEncoderSetParameter(state, BROTLI_PARAM_LGWIN, lgwin);
}
if (ctx->unpackSize > 0) {
if (ctx->unpackSize > 0 && ctx->unpackSize != (uint64_t)(int64_t)-1) {
uint32_t size_hint = ctx->unpackSize < (1 << 30) ?
(uint32_t)ctx->unpackSize : (1u << 30);
BrotliEncoderSetParameter(state, BROTLI_PARAM_SIZE_HINT, size_hint);
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4 changes: 4 additions & 0 deletions CPP/7zip/Archive/ZstdHandler.cpp
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Expand Up @@ -286,6 +286,10 @@ static HRESULT UpdateArchive(
CMyComPtr<ICompressProgressInfo> localProgress = localProgressSpec;
localProgressSpec->Init(updateCallback, true);
NCompress::NZSTD::CEncoder *encoderSpec = new NCompress::NZSTD::CEncoder;
// by zstd archive type store dictID and checksum (similar to zstd client)
encoderSpec->dictIDFlag = 1;
encoderSpec->checksumFlag = 1;
encoderSpec->unpackSize = unpackSize;
CMyComPtr<ICompressCoder> encoder = encoderSpec;
RINOK(props.SetCoderProps(encoderSpec, NULL));
RINOK(encoder->Code(fileInStream, outStream, NULL, NULL, localProgress));
Expand Down
3 changes: 2 additions & 1 deletion CPP/7zip/Compress/BrotliEncoder.cpp
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Expand Up @@ -15,7 +15,8 @@ CEncoder::CEncoder():
_numThreads(NWindows::NSystem::GetNumberOfProcessors()),
_Long(-1),
_WindowLog(-1),
_ctx(NULL)
_ctx(NULL),
unpackSize(0)
{
_props.clear();
}
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25 changes: 24 additions & 1 deletion CPP/7zip/Compress/ZstdEncoder.cpp
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Expand Up @@ -30,7 +30,10 @@ CEncoder::CEncoder():
_LdmHashLog(-1),
_LdmMinMatch(-1),
_LdmBucketSizeLog(-1),
_LdmHashRateLog(-1)
_LdmHashRateLog(-1),
dictIDFlag(-1),
checksumFlag(-1),
unpackSize(0)
{
_props.clear();
}
Expand Down Expand Up @@ -251,6 +254,20 @@ STDMETHODIMP CEncoder::Code(ISequentialInStream *inStream,
err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_contentSizeFlag, 1);
if (ZSTD_isError(err)) return E_INVALIDARG;

if (dictIDFlag != -1) {
err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_dictIDFlag, dictIDFlag);
if (ZSTD_isError(err)) return E_INVALIDARG;
}
if (checksumFlag != -1) {
err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_checksumFlag, checksumFlag);
if (ZSTD_isError(err)) return E_INVALIDARG;
}

if (unpackSize && unpackSize != (UInt64)(Int64)-1) { // size is known
err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_srcSizeHint, (int)(unpackSize <= INT_MAX ? unpackSize : INT_MAX));
if (ZSTD_isError(err)) return E_INVALIDARG;
}

/* enable ldm for large windowlog values */
if (_WindowLog > 27 && _Long == 0)
_Long = 1;
Expand Down Expand Up @@ -320,6 +337,12 @@ STDMETHODIMP CEncoder::Code(ISequentialInStream *inStream,
err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_ldmHashRateLog, _LdmHashRateLog);
if (ZSTD_isError(err)) return E_INVALIDARG;
}

//err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_literalCompressionMode, (int)ZSTD_ps_auto);
//if (ZSTD_isError(err)) return E_INVALIDARG;

//err = ZSTD_CCtx_setParameter(_ctx, ZSTD_c_enableDedicatedDictSearch, 1);
//if (ZSTD_isError(err)) return E_INVALIDARG;
}

for (;;) {
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5 changes: 5 additions & 0 deletions CPP/7zip/Compress/ZstdEncoder.h
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Expand Up @@ -67,6 +67,11 @@ class CEncoder:
Int32 _LdmHashRateLog;

public:

int dictIDFlag;
int checksumFlag;
UInt64 unpackSize;

MY_QUERYINTERFACE_BEGIN2(ICompressCoder)
MY_QUERYINTERFACE_ENTRY(ICompressSetCoderMt)
MY_QUERYINTERFACE_ENTRY(ICompressSetCoderProperties)
Expand Down