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111 lines
3.2 KiB
111 lines
3.2 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_MHP_DATA_BROADCAST_ID_DESCRIPTOR
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#define _UCSI_DVB_MHP_DATA_BROADCAST_ID_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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#ifndef _UCSI_DVB_DATA_BROADCAST_ID_DESCRIPTOR
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#error Must include dvb/data_broadcast_id_descriptor.h first
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#endif
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/**
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* Broadcast IDs for MHP.
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*/
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enum {
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DVB_BROADCAST_ID_MHP_OBJECT_CAROUSEL = 0x00f0,
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DVB_BROADCAST_ID_MHP_MPE = 0x00f1,
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};
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/**
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* dvb_mhp_data_broadcast_id_descriptor structure.
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*/
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struct dvb_mhp_data_broadcast_id_descriptor {
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struct dvb_data_broadcast_id_descriptor d;
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/* uint16_t application_type[] */
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} __ucsi_packed;
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/**
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* Process a dvb_mhp_data_broadcast_id_descriptor.
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*
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* @param d Generic descriptor structure.
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* @return dvb_mhp_data_broadcast_id_descriptor pointer, or NULL on error.
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*/
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static inline struct dvb_mhp_data_broadcast_id_descriptor*
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dvb_mhp_data_broadcast_id_descriptor_codec(struct dvb_data_broadcast_id_descriptor* d)
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{
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uint8_t * buf;
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int len;
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int pos = 0;
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struct dvb_mhp_data_broadcast_id_descriptor *res =
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(struct dvb_mhp_data_broadcast_id_descriptor *) d;
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if ((res->d.data_broadcast_id < 0xf0) || (res->d.data_broadcast_id > 0xfe))
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return NULL;
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buf = dvb_data_broadcast_id_descriptor_id_selector_byte(d);
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len = dvb_data_broadcast_id_descriptor_id_selector_byte_length(d);
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if (len % 2)
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return NULL;
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while(pos < len) {
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bswap16(buf+pos);
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pos+=2;
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}
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return res;
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}
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/**
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* Accessor for the application_type field of a dvb_mhp_data_broadcast_id_descriptor.
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*
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* @param d dvb_mhp_data_broadcast_id_descriptor pointer.
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* @return Pointer to the field.
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*/
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static inline uint16_t *
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dvb_mhp_data_broadcast_id_descriptor_id_application_type(struct dvb_mhp_data_broadcast_id_descriptor *d)
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{
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return (uint16_t *) dvb_data_broadcast_id_descriptor_id_selector_byte((struct dvb_data_broadcast_id_descriptor*) d);
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}
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/**
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* Determine the number of entries in the application_type field of a dvb_mhp_data_broadcast_id_descriptor.
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*
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* @param d dvb_data_broadcast_id_descriptor pointer.
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* @return Length of the field in bytes.
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*/
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static inline int
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dvb_mhp_data_broadcast_id_descriptor_id_application_type_count(struct dvb_mhp_data_broadcast_id_descriptor *d)
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{
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return dvb_data_broadcast_id_descriptor_id_selector_byte_length((struct dvb_data_broadcast_id_descriptor*) d) >> 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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