fileio: create dedicated function to generate zstd frames

like other formats

lib/compress/zstd_compress_internal.h

@@ -158,14 +158,14 @@ struct ZSTD_CCtx_params_s {
 
     /* For use with createCCtxParams() and freeCCtxParams() only */
     ZSTD_customMem customMem;
-
 };  /* typedef'd to ZSTD_CCtx_params within "zstd.h" */
 
 struct ZSTD_CCtx_s {
     ZSTD_compressionStage_e stage;
-    U32   dictID;
+    int cParamsChanged;                  /* == 1 if cParams(except wlog) or compression level are changed in requestedParams. Triggers transmission of new params to ZSTDMT (if available) then reset to 0. */
     ZSTD_CCtx_params requestedParams;
     ZSTD_CCtx_params appliedParams;
+    U32   dictID;
     void* workSpace;
     size_t workSpaceSize;
     size_t blockSize;