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158 lines
4.8 KiB
158 lines
4.8 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_AIT_APPLICATION_ICONS_DESCRIPTOR
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#define _UCSI_DVB_AIT_APPLICATION_ICONS_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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#include <libucsi/types.h>
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/**
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* Possible values for the icon_flags field.
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*/
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enum {
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AIT_APPLICATION_ICON_FLAG_32_32 = 0x001,
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AIT_APPLICATION_ICON_FLAG_32_32_43 = 0x002,
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AIT_APPLICATION_ICON_FLAG_24_32_169 = 0x004,
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AIT_APPLICATION_ICON_FLAG_64_64 = 0x008,
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AIT_APPLICATION_ICON_FLAG_64_64_43 = 0x010,
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AIT_APPLICATION_ICON_FLAG_48_64_169 = 0x020,
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AIT_APPLICATION_ICON_FLAG_128_128 = 0x040,
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AIT_APPLICATION_ICON_FLAG_128_128_43 = 0x080,
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AIT_APPLICATION_ICON_FLAG_96_128_169 = 0x100,
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};
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/**
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* dvb_ait_application_icons_descriptor structure.
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*/
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struct dvb_ait_application_icons_descriptor {
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struct descriptor d;
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uint8_t icon_locator_length;
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/* uint8_t icon_locator[] */
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/* struct dvb_ait_application_icons_descriptor_part2 */
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} __ucsi_packed;
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/**
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* Second part of a dvb_ait_application_icons_descriptor.
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*/
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struct dvb_ait_application_icons_descriptor_part2 {
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uint16_t icon_flags;
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/* uint8_t reserved[] */
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} __ucsi_packed;
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/**
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* Process a dvb_ait_application_icons_descriptor.
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*
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* @param d Generic descriptor pointer.
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* @return dvb_ait_application_icons_descriptor pointer, or NULL on error.
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*/
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static inline struct dvb_ait_application_icons_descriptor*
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dvb_ait_application_icons_descriptor_codec(struct descriptor* d)
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{
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uint8_t* buf = (uint8_t*) d;
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uint32_t pos = 0;
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uint32_t len = d->len + 2;
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struct dvb_ait_application_icons_descriptor *ret =
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(struct dvb_ait_application_icons_descriptor *) d;
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if (len < sizeof(struct dvb_ait_application_icons_descriptor))
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return NULL;
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if (len < (sizeof(struct dvb_ait_application_icons_descriptor) + ret->icon_locator_length))
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return NULL;
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pos += sizeof(struct dvb_ait_application_icons_descriptor) + ret->icon_locator_length;
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if ((len - pos) < sizeof(struct dvb_ait_application_icons_descriptor_part2))
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return NULL;
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bswap16(buf + pos);
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return ret;
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}
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/**
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* Accessor for the icon_locator field of a dvb_ait_application_icons_descriptor.
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*
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* @param e dvb_ait_application_icons_descriptor pointer.
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* @return Pointer to the field.
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*/
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static inline uint8_t *
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dvb_ait_application_icons_descriptor_icon_locator(struct dvb_ait_application_icons_descriptor *e)
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{
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return (uint8_t *) e + sizeof(struct dvb_ait_application_icons_descriptor);
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}
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/**
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* Accessor for the part2 field of a dvb_ait_application_icons_descriptor.
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*
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* @param e dvb_ait_application_icons_descriptor Pointer.
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* @return dvb_ait_application_icons_descriptor_part2 pointer.
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*/
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static inline struct dvb_ait_application_icons_descriptor_part2 *
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dvb_ait_application_icons_descriptor_part2(struct dvb_ait_application_icons_descriptor *e)
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{
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return (struct dvb_ait_application_icons_descriptor_part2 *)
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((uint8_t *) e + sizeof(struct dvb_ait_application_icons_descriptor) +
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e->icon_locator_length);
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}
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/**
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* Accessor for the reserved field of a dvb_ait_application_icons_descriptor_part2.
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*
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* @param e dvb_ait_application_icons_part2 pointer.
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* @return Pointer to the field.
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*/
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static inline uint8_t *
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dvb_ait_application_icons_descriptor_part2_reserved(struct dvb_ait_application_icons_descriptor_part2 *e)
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{
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return (uint8_t *) e + sizeof(struct dvb_ait_application_icons_descriptor_part2);
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}
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/**
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* Calculate the number of bytes in the reserved field of a dvb_ait_application_icons_descriptor_part2.
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*
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* @param d dvb_ait_application_icons_descriptorpointer.
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* @param part2 dvb_ait_application_icons_descriptor_part2 pointer.
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* @return Number of bytes.
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*/
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static inline int
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dvb_ait_application_icons_descriptor_part2_reserved_length(struct dvb_ait_application_icons_descriptor *d,
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struct dvb_ait_application_icons_descriptor_part2* part2)
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{
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uint8_t *ptr = (uint8_t*) part2 + sizeof(struct dvb_ait_application_icons_descriptor_part2);
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uint8_t *end = (uint8_t*) d + d->d.len + 2;
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return (int) (end - ptr);
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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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