source: svn/newcon3bcm2_21bu/BSEAV/lib/mpeg2_ts_parse/psip_dccsct.c

/***************************************************************************
 *     Copyright (c) 2003, Broadcom Corporation
 *     All Rights Reserved
 *     Confidential Property of Broadcom Corporation
 *
 *  THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE
 *  AGREEMENT  BETWEEN THE USER AND BROADCOM.  YOU HAVE NO RIGHT TO USE OR
 *  EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
 *
 * $brcm_Workfile: psip_dccsct.c $
 * $brcm_Revision: 1 $
 * $brcm_Date: 2/7/05 11:23p $
 *
 * [File Description:]
 *
 * Revision History:
 *
 * $brcm_Log: /BSEAV/lib/mpeg2_ts_parse/psip_dccsct.c $
 * 
 * 1   2/7/05 11:23p dlwin
 * Merge down for release 2005_REFSW_MERGETOMAIN:
 * 
 * Irvine_BSEAVSW_Devel/2   2/4/04 9:56a erickson
 * PR9217: converted BDBG_ASSERT calls to CHECK calls. Don't assert on bad
 * data.
 * 
 * Irvine_BSEAVSW_Devel/1   8/29/03 5:02p marcusk
 * Initial Version.
 *
 ***************************************************************************/
#include "bstd.h"
#include "psip_priv.h"
#include "psip_dccsct.h"
BDBG_MODULE(psip_dccsct);

static int PSIP_DCCSCT_P_getUpdateByteOffset( const uint8_t *buf, int updateNum )
{
        uint8_t i;
        int byteOffset = PSIP_TABLE_DATA_OFFSET + 1;

        if( updateNum == -1 )
        {
                updateNum = buf[PSIP_TABLE_DATA_OFFSET];
        }

        /* Jump to correct table (or first byte after last table) */
        for( i = 0; i < updateNum; i++ )
        {
                byteOffset += 2 + buf[byteOffset+1];
                byteOffset += 2 + (TS_READ_16(&buf[byteOffset])&0x3FF);

                CHECK( byteOffset <= TS_PSI_MAX_BYTE_OFFSET(buf) );
        }

        return byteOffset;
}


void PSIP_DCCSCT_getHeader( const uint8_t *buf, PSIP_DCCSCT_header *p_header )
{
        p_header->dccsct_type = TS_READ_16(&buf[TS_PSI_TABLE_ID_EXT_OFFSET]);
        p_header->updates_defined = buf[PSIP_TABLE_DATA_OFFSET];
}

TS_PSI_descriptor PSIP_DCCSCT_getAdditionalDescriptor( const uint8_t *buf, int descriptorNum )
{
        int byteOffset;

        byteOffset = PSIP_DCCSCT_P_getUpdateByteOffset( buf, -1 );
        return TS_P_getDescriptor( &buf[byteOffset+2], (TS_READ_16(&buf[byteOffset])&0x3FF), descriptorNum );
}

BERR_Code PSIP_DCCT_getUpdate( const uint8_t *buf, int updateNum, PSIP_DCCSCT_update *p_update )
{
        int byteOffset;

        if( updateNum >= buf[PSIP_TABLE_DATA_OFFSET] )
        {
                return BERR_INVALID_PARAMETER;
        }

        byteOffset = PSIP_DCCSCT_P_getUpdateByteOffset( buf, updateNum );
        p_update->update_type = buf[byteOffset];
        p_update->update.genre.genre_category_code = buf[byteOffset+2];

        switch( p_update->update_type )
        {
        case PSIP_DCCSCT_new_genre_category:
                /* Fallthrough */
        case PSIP_DCCSCT_new_state:
                p_update->update.genre.p_genre_category_name_text = &buf[byteOffset+3];
                break;
        case PSIP_DCCSCT_new_county:
                p_update->update.county.dcc_county_location_code = (uint16_t)(TS_READ_16(&buf[byteOffset+3]) & 0x3FF);
                p_update->update.county.p_dcc_county_location_code_text = &buf[byteOffset+5];
                break;
        default:
                CHECK(false);
                return BERR_INVALID_PARAMETER;
        }

        return BERR_SUCCESS;
}

TS_PSI_descriptor PSIP_DCCT_getUpdateDescriptor( const uint8_t *buf, int updateNum, int descriptorNum )
{
        int byteOffset;

        byteOffset = PSIP_DCCSCT_P_getUpdateByteOffset( buf, updateNum );
        byteOffset += 2 + buf[byteOffset+1];
        return TS_P_getDescriptor( &buf[byteOffset+2], (TS_READ_16(&buf[byteOffset])&0x3FF), descriptorNum );
}