FreeRDP/include/freerdp/codec/zgfx.h

/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * ZGFX (RDP8) 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_ZGFX_H
#define FREERDP_CODEC_ZGFX_H

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

#include <freerdp/codec/bulk.h>

#define ZGFX_SEGMENTED_SINGLE			0xE0
#define ZGFX_SEGMENTED_MULTIPART		0xE1

struct _ZGFX_CONTEXT
{
	BOOL Compressor;

	BYTE* pbInputCurrent;
	BYTE* pbInputEnd;

	UINT32 bits;
	UINT32 cBitsRemaining;
	UINT32 BitsCurrent;
	UINT32 cBitsCurrent;

	BYTE OutputBuffer[65536];
	UINT32 OutputCount;

	BYTE HistoryBuffer[2500000];
	UINT32 HistoryIndex;
	UINT32 HistoryBufferSize;
};
typedef struct _ZGFX_CONTEXT ZGFX_CONTEXT;

#ifdef __cplusplus
extern "C" {
#endif

FREERDP_API int zgfx_compress(ZGFX_CONTEXT* zgfx, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32* pFlags);
FREERDP_API int zgfx_decompress(ZGFX_CONTEXT* zgfx, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags);

FREERDP_API void zgfx_context_reset(ZGFX_CONTEXT* zgfx, BOOL flush);

FREERDP_API ZGFX_CONTEXT* zgfx_context_new(BOOL Compressor);
FREERDP_API void zgfx_context_free(ZGFX_CONTEXT* zgfx);

#ifdef __cplusplus
}
#endif

#endif /* FREERDP_CODEC_ZGFX_H */