FreeRDP
mppc.c File Reference
#include <winpr/crt.h>
#include <winpr/print.h>
#include <winpr/stream.h>
#include <winpr/bitstream.h>
#include <freerdp/log.h>
#include <freerdp/codec/mppc.h>

Macros

#define TAG   FREERDP_TAG("codec.mppc")
 
#define MPPC_MATCH_INDEX(_sym1, _sym2, _sym3)   ((((MPPC_MATCH_TABLE[_sym3] << 16) + (MPPC_MATCH_TABLE[_sym2] << 8) + MPPC_MATCH_TABLE[_sym1]) & 0x07FFF000) >> 12)
 

Functions

int mppc_decompress (MPPC_CONTEXT *mppc, BYTE *pSrcData, UINT32 SrcSize, BYTE **ppDstData, UINT32 *pDstSize, UINT32 flags)
 
int mppc_compress (MPPC_CONTEXT *mppc, BYTE *pSrcData, UINT32 SrcSize, BYTE **ppDstData, UINT32 *pDstSize, UINT32 *pFlags)
 
void mppc_set_compression_level (MPPC_CONTEXT *mppc, DWORD CompressionLevel)
 
void mppc_context_reset (MPPC_CONTEXT *mppc, BOOL flush)
 
MPPC_CONTEXT * mppc_context_new (DWORD CompressionLevel, BOOL Compressor)
 
void mppc_context_free (MPPC_CONTEXT *mppc)
 

Variables

static const UINT32 MPPC_MATCH_TABLE [256]
 

Macro Definition Documentation

#define MPPC_MATCH_INDEX (   _sym1,
  _sym2,
  _sym3 
)    ((((MPPC_MATCH_TABLE[_sym3] << 16) + (MPPC_MATCH_TABLE[_sym2] << 8) + MPPC_MATCH_TABLE[_sym1]) & 0x07FFF000) >> 12)
#define TAG   FREERDP_TAG("codec.mppc")

FreeRDP: A Remote Desktop Protocol Implementation MPPC Bulk Data Compression

Copyright 2014 Marc-Andre Moreau marca.nosp@m.ndre.nosp@m..more.nosp@m.au@g.nosp@m.mail..nosp@m.com

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Function Documentation

int mppc_compress ( MPPC_CONTEXT *  mppc,
BYTE pSrcData,
UINT32  SrcSize,
BYTE **  ppDstData,
UINT32 pDstSize,
UINT32 pFlags 
)

Here is the call graph for this function:

Here is the caller graph for this function:

void mppc_context_free ( MPPC_CONTEXT *  mppc)

Here is the call graph for this function:

Here is the caller graph for this function:

MPPC_CONTEXT* mppc_context_new ( DWORD  CompressionLevel,
BOOL  Compressor 
)

Here is the call graph for this function:

Here is the caller graph for this function:

void mppc_context_reset ( MPPC_CONTEXT *  mppc,
BOOL  flush 
)

Here is the caller graph for this function:

int mppc_decompress ( MPPC_CONTEXT *  mppc,
BYTE pSrcData,
UINT32  SrcSize,
BYTE **  ppDstData,
UINT32 pDstSize,
UINT32  flags 
)

Literal Encoding

Literal, less than 0x80 bit 0 followed by the lower 7 bits of the literal

Literal, greater than 0x7F bits 10 followed by the lower 7 bits of the literal

CopyOffset Encoding

CopyOffset, range [0, 63] bits 11111 + lower 6 bits of CopyOffset

CopyOffset, range [64, 319] bits 11110 + lower 8 bits of (CopyOffset - 64)

CopyOffset, range [320, 2367] bits 1110 + lower 11 bits of (CopyOffset - 320)

CopyOffset, range [2368, ] bits 110 + lower 16 bits of (CopyOffset - 2368)

CopyOffset, range [0, 63] bits 1111 + lower 6 bits of CopyOffset

CopyOffset, range [64, 319] bits 1110 + lower 8 bits of (CopyOffset - 64)

CopyOffset, range [320, 8191] bits 110 + lower 13 bits of (CopyOffset - 320)

LengthOfMatch Encoding

LengthOfMatch [3] bit 0 + 0 lower bits of LengthOfMatch

LengthOfMatch [4, 7] bits 10 + 2 lower bits of LengthOfMatch

LengthOfMatch [8, 15] bits 110 + 3 lower bits of LengthOfMatch

LengthOfMatch [16, 31] bits 1110 + 4 lower bits of LengthOfMatch

LengthOfMatch [32, 63] bits 11110 + 5 lower bits of LengthOfMatch

LengthOfMatch [64, 127] bits 111110 + 6 lower bits of LengthOfMatch

LengthOfMatch [128, 255] bits 1111110 + 7 lower bits of LengthOfMatch

LengthOfMatch [256, 511] bits 11111110 + 8 lower bits of LengthOfMatch

LengthOfMatch [512, 1023] bits 111111110 + 9 lower bits of LengthOfMatch

LengthOfMatch [1024, 2047] bits 1111111110 + 10 lower bits of LengthOfMatch

LengthOfMatch [2048, 4095] bits 11111111110 + 11 lower bits of LengthOfMatch

LengthOfMatch [4096, 8191] bits 111111111110 + 12 lower bits of LengthOfMatch

LengthOfMatch [8192, 16383] bits 1111111111110 + 13 lower bits of LengthOfMatch

LengthOfMatch [16384, 32767] bits 11111111111110 + 14 lower bits of LengthOfMatch

LengthOfMatch [32768, 65535] bits 111111111111110 + 15 lower bits of LengthOfMatch

Here is the call graph for this function:

Here is the caller graph for this function:

void mppc_set_compression_level ( MPPC_CONTEXT *  mppc,
DWORD  CompressionLevel 
)

Here is the caller graph for this function:

Variable Documentation

const UINT32 MPPC_MATCH_TABLE[256]
static