FreeRDP/include/freerdp/codec/mppc.h

/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * MPPC 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_MPPC_H
#define FREERDP_MPPC_H

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

#include <winpr/bitstream.h>

#define PACKET_COMPRESSED		0x20
#define PACKET_AT_FRONT			0x40
#define PACKET_FLUSHED			0x80

struct _MPPC_CONTEXT
{
	wBitStream* bs;
	BOOL Compressor;
	BYTE* HistoryPtr;
	UINT32 HistoryOffset;
	UINT32 HistoryBufferSize;
	BYTE HistoryBuffer[65536];
	UINT16 MatchBuffer[32768];
	UINT32 CompressionLevel;
};
typedef struct _MPPC_CONTEXT MPPC_CONTEXT;

#ifdef __cplusplus
extern "C" {
#endif

FREERDP_API int mppc_compress(MPPC_CONTEXT* mppc, BYTE* pSrcData, UINT32 SrcSize, BYTE* pDstData, UINT32* pDstSize, UINT32* pFlags);
FREERDP_API int mppc_decompress(MPPC_CONTEXT* mppc, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags);

FREERDP_API void mppc_set_compression_level(MPPC_CONTEXT* mppc, DWORD CompressionLevel);
FREERDP_API void mppc_context_reset(MPPC_CONTEXT* mppc);

FREERDP_API MPPC_CONTEXT* mppc_context_new(DWORD CompressionLevel, BOOL Compressor);
FREERDP_API void mppc_context_free(MPPC_CONTEXT* mppc);

#ifdef __cplusplus
}
#endif

#endif /* FREERDP_MPPC_H */