parsebuffer.h

完整的基于Conxant平台的USB电视棒的WIN驱动程序。

/*+++ *******************************************************************\ 
* 
*  Copyright and Disclaimer: 
*  
*     --------------------------------------------------------------- 
*     This software is provided "AS IS" without warranty of any kind, 
*     either expressed or implied, including but not limited to the 
*     implied warranties of noninfringement, merchantability and/or 
*     fitness for a particular purpose.
*     --------------------------------------------------------------- 
*   
*     Copyright (c) 2008 Conexant Systems, Inc. 
*     All rights reserved. 
*
\******************************************************************* ---*/ 
#ifndef _PARSE_BUFFER_H_
#define _PARSE_BUFFER_H_

extern "C" 
{
#include <wdm.h>
}

#include <windef.h>
#include <ks.h>
#include <ksmedia.h>

#include "BasePin.h"

class ParseBuffer
{
public:
    ParseBuffer(DWORD line_size, DWORD lines_per_buffer);
    ~ParseBuffer();

    virtual VOID resetBuffer();
    VOID notifyPinFormatChange(){_pin_format_changed = TRUE;}

    DWORD getLineSize(){return _line_size;}
    
    DWORD copyLine(PBYTE p_line, DWORD length, FIELD_TYPE field_number, BOOLEAN *partial_line);
    
    VOID setPin(BasePin* p_pin);
    VOID releasePin();

protected:
    virtual VOID doCopy(PBYTE p_buffer, DWORD bytes_to_copy);
    virtual BOOLEAN isBufferDone();
    virtual VOID setPinFormat();
    
protected:
    PKSSTREAM_POINTER   _p_current_buffer;
    DWORD               _lines_completed;
    DWORD               _bytes_left_in_line;
    DWORD               _line_size;
    DWORD               _stride;
    DWORD               _lines_per_field;
    FIELD_TYPE          _current_field;

    BasePin*            _p_pin;

    KMUTEX              _mutex;

    BOOLEAN             _pin_format_changed;

};



#endif