FreeRDP/include/freerdp/codec/ncrush.h

/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * NCrush (RDP6) 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_NCRUSH_H
#define FREERDP_CODEC_NCRUSH_H

#include <freerdp/api.h>
#include <freerdp/types.h>

#include <freerdp/codec/mppc.h>

#include <winpr/bitstream.h>

struct _NCRUSH_CONTEXT
{
	BOOL Compressor;
	BYTE* HistoryPtr;
	UINT32 HistoryOffset;
	UINT32 HistoryEndOffset;
	UINT32 HistoryBufferSize;
	BYTE HistoryBuffer[65536];
	UINT32 HistoryBufferFence;
	UINT32 OffsetCache[4];
	UINT16 HashTable[65536];
	UINT16 MatchTable[65536];
	BYTE HuffTableCopyOffset[1024];
	BYTE HuffTableLOM[4096];
};
typedef struct _NCRUSH_CONTEXT NCRUSH_CONTEXT;

#ifdef __cplusplus
extern "C" {
#endif

FREERDP_API int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32* pFlags);
FREERDP_API int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags);

FREERDP_API void ncrush_context_reset(NCRUSH_CONTEXT* ncrush, BOOL flush);

FREERDP_API NCRUSH_CONTEXT* ncrush_context_new(BOOL Compressor);
FREERDP_API void ncrush_context_free(NCRUSH_CONTEXT* ncrush);

#ifdef __cplusplus
}
#endif

#endif /* FREERDP_CODEC_NCRUSH_H */