4.44 beta

CPP/7zip/Compress/LZMA_Alone/LzmaRam.h

@@ -0,0 +1,46 @@
+// LzmaRam.h
+
+#ifndef __LzmaRam_h
+#define __LzmaRam_h
+
+#include <stdlib.h>
+#include "../../../Common/Types.h"
+
+/*
+LzmaRamEncode: BCJ + LZMA RAM->RAM compressing.
+It uses .lzma format, but it writes one additional byte to .lzma file:
+  0: - no filter
+  1: - x86(BCJ) filter.
+
+To provide best compression ratio dictionarySize mustbe >= inSize
+
+LzmaRamEncode allocates Data with MyAlloc/BigAlloc functions.
+RAM Requirements:
+  RamSize = dictionarySize * 9.5 + 6MB + FilterBlockSize 
+    FilterBlockSize = 0, if useFilter == false
+    FilterBlockSize = inSize, if useFilter == true
+
+  Return code:
+    0 - OK
+    1 - Unspecified Error
+    2 - Memory allocating error
+    3 - Output buffer OVERFLOW
+
+If you use SZ_FILTER_AUTO mode, then encoder will use 2 or 3 passes:
+  2 passes when FILTER_NO provides better compression.
+  3 passes when FILTER_YES provides better compression.
+*/
+
+enum ESzFilterMode 
+{
+  SZ_FILTER_NO,
+  SZ_FILTER_YES,
+  SZ_FILTER_AUTO
+};
+
+int LzmaRamEncode(
+    const Byte *inBuffer, size_t inSize, 
+    Byte *outBuffer, size_t outSize, size_t *outSizeProcessed, 
+    UInt32 dictionarySize, ESzFilterMode filterMode);
+
+#endif