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/*
* 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_AC3_DESCRIPTOR
#define _UCSI_DVB_AC3_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* dvb_ac3_descriptor structure.
*/
struct dvb_ac3_descriptor {
struct descriptor d;
EBIT5(uint8_t ac3_type_flag : 1; ,
uint8_t bsid_flag : 1; ,
uint8_t mainid_flag : 1; ,
uint8_t asvc_flag : 1; ,
uint8_t reserved : 4; );
/* uint8_t additional_info[] */
} __ucsi_packed;
/**
* Process a dvb_ac3_descriptor.
*
* @param d Generic descriptor structure.
* @return dvb_ac3_descriptor pointer, or NULL on error.
*/
static inline struct dvb_ac3_descriptor*
dvb_ac3_descriptor_codec(struct descriptor* d)
{
if (d->len < (sizeof(struct dvb_ac3_descriptor) - 2))
return NULL;
return (struct dvb_ac3_descriptor*) d;
}
/**
* Retrieve pointer to additional_info field of a dvb_ac3_descriptor.
*
* @param d dvb_ac3_descriptor pointer.
* @return Pointer to additional_info field.
*/
static inline uint8_t *dvb_ac3_descriptor_additional_info(struct dvb_ac3_descriptor *d)
{
return (uint8_t *) d + sizeof(struct dvb_ac3_descriptor);
}
/**
* Determine length of additional_info field of a dvb_ac3_descriptor.
*
* @param d dvb_ac3_descriptor pointer.
* @return Length of field in bytes.
*/
static inline int dvb_ac3_descriptor_additional_info_length(struct dvb_ac3_descriptor *d)
{
return d->d.len - 1;
}
#ifdef __cplusplus
}
#endif
#endif
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