source: svn/trunk/newcon3bcm2_21bu/dta/src/dvb/dvb_bat.c @ 27

/***************************************************************************
 *     Copyright (c) 2011, 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:  $
 * $brcm_Revision:  $
 * $brcm_Date: $
 *
 * Module Description:
 *
 * Revision History:
 *
 * $brcm_Log:  $
 *
 ****************************************************************************/

#include "bstd.h"
#include "bkni.h"
#include "ts_priv.h"
#include "ts_psi.h"
#include "ministd.h"
#include "dvb_parser.h"

#include "si.h"
#include "si_util.h"

BDBG_MODULE(dvb_bat);

static uint8_t bat_version_num;
static uint8_t bat_last_section;
static uint32_t bat_section_mask[8];

void dvb_bat_init(void)
{
        int i;

        bat_version_num = 32;
        bat_last_section = 0;
        for (i=0; i<8; i++) {
                bat_section_mask[i] = 0;
        }
}

int dvb_bat_parse(const uint8_t *bat_buf, size_t *psize)
{
        uint8_t tid, version_num, section_num, last_section;
        uint16_t bouquet_id, section_len, desc_len, loop_len, parsed;
        uint16_t stream_id, network_id;
        struct bit_state_t bs;

        BDBG_ASSERT(bat_buf && psize);
        BDBG_MSG(("%s: enter", __FUNCTION__));

        bs.data = (unsigned char *)bat_buf;
        bs.bindex = 0;

        tid = get_bits(8, &bs);
        if (tid != DVB_TID_BAT) {
                BDBG_WRN(("%s: invalid table id (0x%x)", __FUNCTION__, tid));
                return 0;
        }

        get_bits(4, &bs); /* skip section_syntax_indicator, reserved field */
        section_len = get_bits(12, &bs);
        bouquet_id = get_bits(16, &bs);
        get_bits(2, &bs); /* skip reserved */
        version_num = get_bits(5, &bs);
        get_bits(1, &bs); /* skip current_next_indicator */

        section_num = get_bits(8, &bs);
        last_section = get_bits(8, &bs);
        get_bits(4, &bs);

        if (version_num != bat_version_num) {
                SI_Init_Section_Mask((unsigned long *)bat_section_mask, last_section);
                bat_last_section = last_section;
        }
        else if (SI_Chk_Section_mask((unsigned long *)bat_section_mask, section_num)) {
                /* same version deliver */
                return 0;
        }

        SI_Set_Section_mask((unsigned long *)bat_section_mask, section_num);

        desc_len = get_bits(12, &bs);
        dvb_parse_descriptors((uint8_t *)&bat_buf[bs.bindex/8], desc_len, DVB_TID_BAT, NULL);
        
        bs.bindex = bs.bindex + desc_len*8;
        get_bits(4, &bs); 

        loop_len = get_bits(12, &bs);
        parsed = 0;

        while (parsed<loop_len) {
                stream_id = get_bits(16, &bs);
                network_id = get_bits(16, &bs);
                get_bits(4, &bs);
                desc_len = get_bits(12, &bs);
                parsed += 6;
                
                dvb_parse_descriptors((uint8_t *)&bat_buf[bs.bindex/8], desc_len, DVB_TID_BAT, NULL);
                bs.bindex = bs.bindex + desc_len*8;
                parsed += desc_len;             
        }
        return 1;       
}

bool dvb_bat_complete(void)
{
        return (SI_Chk_Section_complete((unsigned long *)bat_section_mask, bat_last_section) == SI_SUCCESS);
}