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fileio: create dedicated function to generate zstd frames

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This commit is contained in:
Yann Collet
2018-02-02 14:24:56 -08:00
parent 6c492af284
commit 90eca318a7
6 changed files with 137 additions and 94 deletions
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lib/compress/zstdmt_compress.c
+9 -18
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@@ -666,25 +666,16 @@ static ZSTD_CCtx_params ZSTDMT_initJobCCtxParams(ZSTD_CCtx_params const params)
return jobParams;
}
/*! ZSTDMT_MTCtx_setParametersUsingCCtxParams_whileCompressing() :
* Apply a ZSTD_CCtx_params to the compression context.
* This entry point is accessed while compression is ongoing,
* new parameters will be applied to next compression job.
* However, following parameters are NOT updated :
* - window size
* - pledgedSrcSize
* - nb threads
* - job size
* - overlap size
*/
void ZSTDMT_MTCtx_setParametersUsingCCtxParams_whileCompressing(ZSTDMT_CCtx* mtctx, const ZSTD_CCtx_params* params)
/*! ZSTDMT_MTCtx_updateParametersWhileCompressing() :
* Update compression level and parameters (except wlog)
* while compression is ongoing.
* New parameters will be applied to next compression job. */
void ZSTDMT_MTCtx_updateParametersWhileCompressing(ZSTDMT_CCtx* mtctx, int compressionLevel, ZSTD_compressionParameters cParams)
{
U32 const wlog = mtctx->params.cParams.windowLog;
U32 const nbWorkers = mtctx->params.nbWorkers;
mtctx->params = *params;
U32 const wlog = cParams.windowLog;
mtctx->params.cParams = cParams;
mtctx->params.cParams.windowLog = wlog; /* Do not modify windowLog ! Frame must keep same wlog during the whole process ! */
mtctx->params.nbWorkers = nbWorkers; /* Do not modify nbWorkers, it must remain synchronized with CCtx Pool ! */
/* note : other parameters not updated are simply not used beyond initialization */
mtctx->params.compressionLevel = compressionLevel;
}
/* ZSTDMT_getNbWorkers():
@@ -915,7 +906,7 @@ size_t ZSTDMT_initCStream_internal(
const ZSTD_CDict* cdict, ZSTD_CCtx_params params,
unsigned long long pledgedSrcSize)
{
DEBUGLOG(2, "ZSTDMT_initCStream_internal (pledgedSrcSize=%u, nbWorkers=%u, cctxPool=%u)",
DEBUGLOG(4, "ZSTDMT_initCStream_internal (pledgedSrcSize=%u, nbWorkers=%u, cctxPool=%u)",
(U32)pledgedSrcSize, params.nbWorkers, mtctx->cctxPool->totalCCtx);
/* params are supposed to be fully validated at this point */
assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams)));