git.cworth.org Git - vogl/blob - src/voglcore/vogl_lzma_codec.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2013-2014 RAD Game Tools and Valve Software
   4  * Copyright 2010-2014 Rich Geldreich and Tenacious Software LLC
   5  * All Rights Reserved.
   6  *
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   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 // File: vogl_lzma_codec.h
  28 #pragma once
  29
  30 #include "vogl_core.h"
  31 #include "vogl_packed_uint.h"
  32
  33 namespace vogl
  34 {
  35     class lzma_codec
  36     {
  37     public:
  38         lzma_codec();
  39         ~lzma_codec();
  40
  41         // Always available, because we're statically linking in lzmalib now vs. dynamically loading the DLL.
  42         bool is_initialized() const
  43         {
  44             return true;
  45         }
  46
  47         bool pack(const void *p, uint n, vogl::vector<uint8> &buf);
  48
  49         bool unpack(const void *p, uint n, vogl::vector<uint8> &buf);
  50
  51     private:
  52         typedef int(VOGL_STDCALL *LzmaCompressFuncPtr)(unsigned char *dest, size_t *destLen, const unsigned char *src, size_t srcLen,
  53                                                          unsigned char *outProps, size_t *outPropsSize, /* *outPropsSize must be = 5 */
  54                                                          int level,                                     /* 0 <= level <= 9, default = 5 */
  55                                                          unsigned dictSize,                             /* default = (1 << 24) */
  56                                                          int lc,                                        /* 0 <= lc <= 8, default = 3  */
  57                                                          int lp,                                        /* 0 <= lp <= 4, default = 0  */
  58                                                          int pb,                                        /* 0 <= pb <= 4, default = 2  */
  59                                                          int fb,                                        /* 5 <= fb <= 273, default = 32 */
  60                                                          int numThreads                                 /* 1 or 2, default = 2 */
  61                                                          );
  62
  63         typedef int(VOGL_STDCALL *LzmaUncompressFuncPtr)(unsigned char *dest, size_t *destLen, const unsigned char *src, size_t *srcLen,
  64                                                            const unsigned char *props, size_t propsSize);
  65
  66         LzmaCompressFuncPtr m_pCompress;
  67         LzmaUncompressFuncPtr m_pUncompress;
  68
  69         enum
  70         {
  71             cLZMAPropsSize = 5
  72         };
  73
  74 #pragma pack(push)
  75 #pragma pack(1)
  76         struct header
  77         {
  78             enum
  79             {
  80                 cSig = 'L' | ('0' << 8),
  81                 cChecksumSkipBytes = 3
  82             };
  83             packed_uint<2> m_sig;
  84             uint8 m_checksum;
  85
  86             uint8 m_lzma_props[cLZMAPropsSize];
  87
  88             packed_uint<4> m_comp_size;
  89             packed_uint<4> m_uncomp_size;
  90
  91             packed_uint<4> m_adler32;
  92         };
  93 #pragma pack(pop)
  94     };
  95
  96 } // namespace vogl