source: svn/newcon3bcm2_21bu/dst/dhl/src/DHL_UTL.c

/**

        @file

                DHL_UTL.c



        @brief

                PHOENIX HAL library





        Copyright 2006~2010 Digital STREAM Technology, Inc.

        All Rights Reserved

*/





#include "DHL_OSAL.h"

#include "DHL_DBG.h"



#include "DHL_UTL.h"





/*

        ¸ðµç Çì´õ ÆÄÀÏÀ» Æ÷ÇÔÇÏÁö´Â ¾ÊÀ¸¸ç, compile timeÀ» ÁÙÀ̱â À§ÇØ

        °¢ ¸ðµâÀº ÇÊ¿äÇÑ ¸¸Å­ÀÇ Çì´õ¸¦ ¼±¾ðÇϵµ·Ï ÇÔ.

*/







/*

        DHL µð¹ö±× ¸ðµâ À̸§ Á¤ÀÇ ·ê Âü°í:



        DHL ¸ðµâµéÀº ¸ðµÎ * ·Î ½ÃÀÛ.

        API´Â ´ë¹®ÀÚ, Platform ¹× ±âŸ´Â ¼Ò¹®ÀÚ »ç¿ë.



        µðÆúÆ® ·¹º§Àº 0À¸·Î ¼³Á¤ÇÑ´Ù. (0: ¿¡·¯ ¸Þ½ÃÁö¸¸ Ãâ·Â)

        

        

*/



//DHL_MODULE("*UTL", 0);







#if COMMENT

____Config____(){}

#endif



/*

        ÀÌ ¸ðµâ ³»ºÎ¿¡¼­ »ç¿ëµÇ´Â °¢Á¾ configuration Á¤ÀÇ.

*/





/* #define SUPPORT_FAST_SWITCHING_OPTIMIZATION 1 */

/* #define FUNC_MONITOR_TIMER_ID TIMER_ID_FUNC_MONITOR */







#if COMMENT

____Types____(){}

#endif



/*

        ÀÌ ¸ðµâ ³»ºÎ¿¡¼­ »ç¿ëµÇ´Â structure ¹× enumerations.

*/







#if COMMENT

____Variables____(){}

#endif



/*

        global·Î Àû¿ëµÇ´Â variable Á¤ÀÇ.

        °¢ function º°·Î Ư¼öÇÑ ¿ëµµÀÇ variableÀº °¢ functionX block ¿¡¼­ Á¤ÀÇ °¡´É.

*/







#if COMMENT

____API____(){}

#endif



static UINT32 dhl_crcTable[256];



static BOOLEAN dhl_CRCInited;



#define  DEMUX_CRC_ADDER_MASK    0x04C11DB7  /* As defined in MPEG-2 CRC */





void dhl_InitCRC(void)

{

        UINT32          crc;

        INT32           i, j;



        if (dhl_CRCInited) return;

        

        // Initialize CRC table

        for (i=0; i<256; i++) {

                crc = 0;

                for (j=7; j>=0; j--) {

                        if (((i >> j) ^ (crc >> 31)) & 1) {

                                crc=(crc<<1)^DEMUX_CRC_ADDER_MASK;

                        }

                        else {

                                crc<<=1;

                        }

                }

                dhl_crcTable[i] = crc;

        }

        dhl_CRCInited = TRUE;

}





UINT32 DHL_UTL_CalcCRC32(UINT32 crc_start, const UINT8 *data, UINT32 len)

{

    UINT32  crc = crc_start;

    UINT32  i;



    if (!dhl_CRCInited) {

        dhl_InitCRC();

    }



    for (i = 0; i < len; ++i) {

        crc = (crc << 8) ^ dhl_crcTable[(crc >> 24) ^ (*data++)];

    }

    

    return(crc);

}









#if COMMENT

____Debug____(){}

#endif









#if COMMENT

____Symbol____(){}

#endif





#if DHL_REGISTER_DEUBG_SYMBOLS



static DHL_SymbolTable _XxxxSymbols[] =

{

        /* however, if you want typing short-cut, it is good usage.

        */

/*      DHL_FNC_SYM_ENTRY2("epg_start", App_EpgUpdateStart),

        DHL_FNC_SYM_ENTRY2("epg_stop", App_EpgUpdateCancel),

        DHL_FNC_SYM_ENTRY2("epg_list", Dmc_EpgPrintAllTables),

        DHL_FNC_SYM_ENTRY2("epg_delete", App_EpgDeleteAll),



        DHL_VAR_SYM_ENTRY(g_XX_TestMode),*/

        0,



};



#endif  /* DHL_REGISTER_DEUBG_SYMBOLS */







#if COMMENT

____Init____(){}

#endif







/* end of file */