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78 lines
2.3 KiB
78 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_TERRESTRIAL_DELIVERY_DESCRIPTOR
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#define _UCSI_DVB_TERRESTRIAL_DELIVERY_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_terrestrial_delivery_descriptor structure.
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*/
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struct dvb_terrestrial_delivery_descriptor {
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struct descriptor d;
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uint32_t centre_frequency; // Normal integer, units 10Hz
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EBIT5(uint8_t bandwidth : 3; ,
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uint8_t priority : 1; ,
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uint8_t time_slicing_indicator : 1; ,
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uint8_t mpe_fec_indicator : 1; ,
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uint8_t reserved_1 : 2; );
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EBIT3(uint8_t constellation : 2; ,
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uint8_t hierarchy_information : 3; ,
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uint8_t code_rate_hp_stream : 3; );
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EBIT4(uint8_t code_rate_lp_stream : 3; ,
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uint8_t guard_interval : 2; ,
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uint8_t transmission_mode : 2; ,
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uint8_t other_frequency_flag : 1; );
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uint32_t reserved_2;
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} __ucsi_packed;
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/**
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* Process a dvb_terrestrial_delivery_descriptor.
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*
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* @param d Generic descriptor structure.
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* @return dvb_terrestrial_delivery_descriptor pointer, or NULL on error.
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*/
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static inline struct dvb_terrestrial_delivery_descriptor*
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dvb_terrestrial_delivery_descriptor_codec(struct descriptor* d)
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{
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if (d->len != (sizeof(struct dvb_terrestrial_delivery_descriptor) - 2))
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return NULL;
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bswap32((uint8_t*) d + 2);
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bswap32((uint8_t*) d + 9);
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return (struct dvb_terrestrial_delivery_descriptor*) d;
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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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