release/src-rt-6.x/linux/linux-2.6/scripts/squashfs/lzma/C/7zip/Compress/LZMA_Alone/LzmaRam.h

   1 // LzmaRam.h
   2
   3 #ifndef __LzmaRam_h
   4 #define __LzmaRam_h
   5
   6 #include <stdlib.h>
   7 #include "../../../Common/Types.h"
   8
   9 /*
  10 LzmaRamEncode: BCJ + LZMA RAM->RAM compressing.
  11 It uses .lzma format, but it writes one additional byte to .lzma file:
  12   0: - no filter
  13   1: - x86(BCJ) filter.
  14
  15 To provide best compression ratio dictionarySize mustbe >= inSize
  16
  17 LzmaRamEncode allocates Data with MyAlloc/BigAlloc functions.
  18 RAM Requirements:
  19   RamSize = dictionarySize * 9.5 + 6MB + FilterBlockSize
  20     FilterBlockSize = 0, if useFilter == false
  21     FilterBlockSize = inSize, if useFilter == true
  22
  23   Return code:
  24     0 - OK
  25     1 - Unspecified Error
  26     2 - Memory allocating error
  27     3 - Output buffer OVERFLOW
  28
  29 If you use SZ_FILTER_AUTO mode, then encoder will use 2 or 3 passes:
  30   2 passes when FILTER_NO provides better compression.
  31   3 passes when FILTER_YES provides better compression.
  32 */
  33
  34 enum ESzFilterMode
  35 {
  36   SZ_FILTER_NO,
  37   SZ_FILTER_YES,
  38   SZ_FILTER_AUTO
  39 };
  40
  41 int LzmaRamEncode(
  42     const Byte *inBuffer, size_t inSize,
  43     Byte *outBuffer, size_t outSize, size_t *outSizeProcessed,
  44     UInt32 dictionarySize, ESzFilterMode filterMode);
  45
  46 #endif