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make it possible to express compression parameters in any order

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This commit is contained in:
Yann Collet
2018-03-19 14:41:23 -07:00
parent 9618c0c804
commit 6f4d0778a5
7 changed files with 110 additions and 150 deletions
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lib/compress/zstdmt_compress.c
+7 -7
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@@ -667,19 +667,19 @@ static ZSTD_CCtx_params ZSTDMT_initJobCCtxParams(ZSTD_CCtx_params const params)
}
/*! ZSTDMT_updateCParams_whileCompressing() :
* Update compression level and parameters (except wlog)
* while compression is ongoing.
* Updates only a selected set of compression parameters, to remain compatible with current frame.
* New parameters will be applied to next compression job. */
void ZSTDMT_updateCParams_whileCompressing(ZSTDMT_CCtx* mtctx, int compressionLevel, ZSTD_compressionParameters cParams)
void ZSTDMT_updateCParams_whileCompressing(ZSTDMT_CCtx* mtctx, const ZSTD_CCtx_params* cctxParams)
{
U32 const saved_wlog = mtctx->params.cParams.windowLog; /* Do not modify windowLog while compressing */
int const compressionLevel = cctxParams->compressionLevel;
DEBUGLOG(5, "ZSTDMT_updateCParams_whileCompressing (level:%i)",
compressionLevel);
mtctx->params.compressionLevel = compressionLevel;
if (compressionLevel != ZSTD_CLEVEL_CUSTOM)
cParams = ZSTD_getCParams(compressionLevel, mtctx->frameContentSize, 0 /* dictSize */ );
cParams.windowLog = saved_wlog;
mtctx->params.cParams = cParams;
{ ZSTD_compressionParameters cParams = ZSTD_getCParamsFromCCtxParams(cctxParams, 0, 0);
cParams.windowLog = saved_wlog;
mtctx->params.cParams = cParams;
}
}
/* ZSTDMT_getNbWorkers():