/**

 * 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 */