mirror of https://github.com/FreeRDP/FreeRDP
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/**
|
|
* FreeRDP: A Remote Desktop Protocol Implementation
|
|
* XCrush (RDP6.1) Bulk Data Compression
|
|
*
|
|
* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.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.
|
|
*/
|
|
|
|
#ifndef FREERDP_CODEC_XCRUSH_H
|
|
#define FREERDP_CODEC_XCRUSH_H
|
|
|
|
#include <freerdp/api.h>
|
|
#include <freerdp/types.h>
|
|
|
|
#include <freerdp/codec/mppc.h>
|
|
|
|
#pragma pack(push,1)
|
|
|
|
struct _XCRUSH_MATCH_INFO
|
|
{
|
|
UINT32 MatchOffset;
|
|
UINT32 ChunkOffset;
|
|
UINT32 MatchLength;
|
|
};
|
|
typedef struct _XCRUSH_MATCH_INFO XCRUSH_MATCH_INFO;
|
|
|
|
struct _XCRUSH_CHUNK
|
|
{
|
|
UINT32 offset;
|
|
UINT32 next;
|
|
};
|
|
typedef struct _XCRUSH_CHUNK XCRUSH_CHUNK;
|
|
|
|
struct _XCRUSH_SIGNATURE
|
|
{
|
|
UINT16 seed;
|
|
UINT16 size;
|
|
};
|
|
typedef struct _XCRUSH_SIGNATURE XCRUSH_SIGNATURE;
|
|
|
|
struct _RDP61_MATCH_DETAILS
|
|
{
|
|
UINT16 MatchLength;
|
|
UINT16 MatchOutputOffset;
|
|
UINT32 MatchHistoryOffset;
|
|
};
|
|
typedef struct _RDP61_MATCH_DETAILS RDP61_MATCH_DETAILS;
|
|
|
|
struct _RDP61_COMPRESSED_DATA
|
|
{
|
|
BYTE Level1ComprFlags;
|
|
BYTE Level2ComprFlags;
|
|
UINT16 MatchCount;
|
|
RDP61_MATCH_DETAILS* MatchDetails;
|
|
BYTE* Literals;
|
|
};
|
|
typedef struct _RDP61_COMPRESSED_DATA RDP61_COMPRESSED_DATA;
|
|
|
|
#pragma pack(pop)
|
|
|
|
struct _XCRUSH_CONTEXT
|
|
{
|
|
BOOL Compressor;
|
|
MPPC_CONTEXT* mppc;
|
|
BYTE* HistoryPtr;
|
|
UINT32 HistoryOffset;
|
|
UINT32 HistoryBufferSize;
|
|
BYTE HistoryBuffer[2000000];
|
|
BYTE BlockBuffer[16384];
|
|
UINT32 CompressionFlags;
|
|
|
|
UINT32 SignatureIndex;
|
|
UINT32 SignatureCount;
|
|
XCRUSH_SIGNATURE Signatures[1000];
|
|
|
|
UINT32 ChunkHead;
|
|
UINT32 ChunkTail;
|
|
XCRUSH_CHUNK Chunks[65534];
|
|
UINT16 NextChunks[65536];
|
|
|
|
UINT32 OriginalMatchCount;
|
|
UINT32 OptimizedMatchCount;
|
|
XCRUSH_MATCH_INFO OriginalMatches[1000];
|
|
XCRUSH_MATCH_INFO OptimizedMatches[1000];
|
|
};
|
|
typedef struct _XCRUSH_CONTEXT XCRUSH_CONTEXT;
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
FREERDP_API int xcrush_compress(XCRUSH_CONTEXT* xcrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32* pFlags);
|
|
FREERDP_API int xcrush_decompress(XCRUSH_CONTEXT* xcrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags);
|
|
|
|
FREERDP_API void xcrush_context_reset(XCRUSH_CONTEXT* xcrush, BOOL flush);
|
|
|
|
FREERDP_API XCRUSH_CONTEXT* xcrush_context_new(BOOL Compressor);
|
|
FREERDP_API void xcrush_context_free(XCRUSH_CONTEXT* xcrush);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* FREERDP_CODEC_XCRUSH_H */
|
|
|