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89 lines
2.3 KiB
89 lines
2.3 KiB
/*
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* section and descriptor parser
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*
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* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
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* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef _UCSI_DVB_AC3_DESCRIPTOR
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#define _UCSI_DVB_AC3_DESCRIPTOR 1
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <libucsi/descriptor.h>
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#include <libucsi/endianops.h>
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/**
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* dvb_ac3_descriptor structure.
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*/
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struct dvb_ac3_descriptor {
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struct descriptor d;
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EBIT5(uint8_t ac3_type_flag : 1; ,
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uint8_t bsid_flag : 1; ,
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uint8_t mainid_flag : 1; ,
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uint8_t asvc_flag : 1; ,
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uint8_t reserved : 4; );
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/* uint8_t additional_info[] */
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} __ucsi_packed;
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/**
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* Process a dvb_ac3_descriptor.
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*
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* @param d Generic descriptor structure.
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* @return dvb_ac3_descriptor pointer, or NULL on error.
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*/
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static inline struct dvb_ac3_descriptor*
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dvb_ac3_descriptor_codec(struct descriptor* d)
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{
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if (d->len < (sizeof(struct dvb_ac3_descriptor) - 2))
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return NULL;
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return (struct dvb_ac3_descriptor*) d;
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}
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/**
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* Retrieve pointer to additional_info field of a dvb_ac3_descriptor.
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*
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* @param d dvb_ac3_descriptor pointer.
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* @return Pointer to additional_info field.
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*/
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static inline uint8_t *dvb_ac3_descriptor_additional_info(struct dvb_ac3_descriptor *d)
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{
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return (uint8_t *) d + sizeof(struct dvb_ac3_descriptor);
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}
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/**
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* Determine length of additional_info field of a dvb_ac3_descriptor.
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*
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* @param d dvb_ac3_descriptor pointer.
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* @return Length of field in bytes.
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*/
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static inline int dvb_ac3_descriptor_additional_info_length(struct dvb_ac3_descriptor *d)
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{
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return d->d.len - 1;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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