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.highlight /*
* section and descriptor parser
*
* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef _UCSI_DVB_SERVICE_AVAILABILITY_DESCRIPTOR
#define _UCSI_DVB_SERVICE_AVAILABILITY_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* dvb_service_availability_descriptor structure.
*/
struct dvb_service_availability_descriptor {
struct descriptor d;
EBIT2(uint8_t availability_flag : 1; ,
uint8_t reserved : 7; );
/* uint16_t cell_ids[] */
} __ucsi_packed;
/**
* Process a dvb_service_availability_descriptor.
*
* @param d Pointer to a generic descriptor structure.
* @return dvb_service_availability_descriptor pointer, or NULL on error.
*/
static inline struct dvb_service_availability_descriptor*
dvb_service_availability_descriptor_codec(struct descriptor* d)
{
uint32_t pos = 0;
uint8_t* buf = (uint8_t*) d + 2;
uint32_t len = d->len;
pos += sizeof(struct dvb_service_availability_descriptor) - 2;
if ((len - pos) % 2)
return NULL;
while(pos < len) {
bswap16(buf+pos);
pos += 2;
}
return (struct dvb_service_availability_descriptor*) d;
}
/**
* Accessor for the cell_ids field of a dvb_service_availability_descriptor.
*
* @param d dvb_service_availability_descriptor pointer.
* @return Pointer to the field.
*/
static inline uint16_t *
dvb_service_availability_descriptor_cell_ids(struct dvb_service_availability_descriptor *d)
{
return (uint16_t *) ((uint8_t *) d + sizeof(struct dvb_service_availability_descriptor));
}
/**
* Determine the number of entries in the cell_ids field of a dvb_service_availability_descriptor.
*
* @param d dvb_service_availability_descriptor pointer.
* @return The number of entries.
*/
static inline int
dvb_service_availability_descriptor_cell_ids_count(struct dvb_service_availability_descriptor *d)
{
return (d->d.len - 1) >> 1;
}
#ifdef __cplusplus
}
#endif
#endif
