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// Copyright (c) 2006-2019 Intel Corporation
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#ifndef __BITSTREAMIN_H__
#define __BITSTREAMIN_H__
#include "umc_defs.h"
#if defined (MFX_ENABLE_MJPEG_VIDEO_DECODE)
#include "jpegbase.h"
class CBaseStreamInput;
const int DEC_DEFAULT_BUFLEN = 4096; // internal intermediate input buffer
class CBitStreamInput
{
public:
CBitStreamInput(void);
virtual ~CBitStreamInput(void);
CBitStreamInput(const CBitStreamInput&) = delete;
void operator=(const CBitStreamInput&) = delete;
JERRCODE Attach(CBaseStreamInput* in);
JERRCODE Detach(void);
JERRCODE Init(int bufSize = DEC_DEFAULT_BUFLEN);
JERRCODE FillBuffer(int nMinBytes = 0);
uint8_t* GetDataPtr(void) const { return m_pData; }
int GetDataLen(void) const { return m_DataLen; }
uint8_t* GetCurrPtr(void) const { return m_pData + m_currPos; }
int GetCurrPos(void) const { return m_currPos; }
void SetCurrPos(int cp) { m_nUsedBytes += (cp - m_currPos); m_currPos = cp; }
int GetNumUsedBytes(void) { return m_nUsedBytes; }
JERRCODE Seek(long offset, int origin = UIC_SEEK_CUR);
JERRCODE CheckByte(int pos, int* byte);
JERRCODE ReadByte(int* byte);
JERRCODE ReadWord(int* word);
JERRCODE ReadDword(int* dword);
JERRCODE SeekAfterByte(uint8_t byte, int* skipped = NULL);
protected:
CBaseStreamInput* m_in;
uint8_t* m_pData;
int m_DataLen;
int m_currPos;
int m_nUsedBytes;
int m_eod;
};
#endif // MFX_ENABLE_MJPEG_VIDEO_DECODE
#endif // __BITSTREAMIN_H__
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