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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_AIT_APPLICATION_ICONS_DESCRIPTOR
#define _UCSI_DVB_AIT_APPLICATION_ICONS_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
#include <libucsi/types.h>
/**
* Possible values for the icon_flags field.
*/
enum {
AIT_APPLICATION_ICON_FLAG_32_32 = 0x001,
AIT_APPLICATION_ICON_FLAG_32_32_43 = 0x002,
AIT_APPLICATION_ICON_FLAG_24_32_169 = 0x004,
AIT_APPLICATION_ICON_FLAG_64_64 = 0x008,
AIT_APPLICATION_ICON_FLAG_64_64_43 = 0x010,
AIT_APPLICATION_ICON_FLAG_48_64_169 = 0x020,
AIT_APPLICATION_ICON_FLAG_128_128 = 0x040,
AIT_APPLICATION_ICON_FLAG_128_128_43 = 0x080,
AIT_APPLICATION_ICON_FLAG_96_128_169 = 0x100,
};
/**
* dvb_ait_application_icons_descriptor structure.
*/
struct dvb_ait_application_icons_descriptor {
struct descriptor d;
uint8_t icon_locator_length;
/* uint8_t icon_locator[] */
/* struct dvb_ait_application_icons_descriptor_part2 */
} __ucsi_packed;
/**
* Second part of a dvb_ait_application_icons_descriptor.
*/
struct dvb_ait_application_icons_descriptor_part2 {
uint16_t icon_flags;
/* uint8_t reserved[] */
} __ucsi_packed;
/**
* Process a dvb_ait_application_icons_descriptor.
*
* @param d Generic descriptor pointer.
* @return dvb_ait_application_icons_descriptor pointer, or NULL on error.
*/
static inline struct dvb_ait_application_icons_descriptor*
dvb_ait_application_icons_descriptor_codec(struct descriptor* d)
{
uint8_t* buf = (uint8_t*) d;
uint32_t pos = 0;
uint32_t len = d->len + 2;
struct dvb_ait_application_icons_descriptor *ret =
(struct dvb_ait_application_icons_descriptor *) d;
if (len < sizeof(struct dvb_ait_application_icons_descriptor))
return NULL;
if (len < (sizeof(struct dvb_ait_application_icons_descriptor) + ret->icon_locator_length))
return NULL;
pos += sizeof(struct dvb_ait_application_icons_descriptor) + ret->icon_locator_length;
if ((len - pos) < sizeof(struct dvb_ait_application_icons_descriptor_part2))
return NULL;
bswap16(buf + pos);
return ret;
}
/**
* Accessor for the icon_locator field of a dvb_ait_application_icons_descriptor.
*
* @param e dvb_ait_application_icons_descriptor pointer.
* @return Pointer to the field.
*/
static inline uint8_t *
dvb_ait_application_icons_descriptor_icon_locator(struct dvb_ait_application_icons_descriptor *e)
{
return (uint8_t *) e + sizeof(struct dvb_ait_application_icons_descriptor);
}
/**
* Accessor for the part2 field of a dvb_ait_application_icons_descriptor.
*
* @param e dvb_ait_application_icons_descriptor Pointer.
* @return dvb_ait_application_icons_descriptor_part2 pointer.
*/
static inline struct dvb_ait_application_icons_descriptor_part2 *
dvb_ait_application_icons_descriptor_part2(struct dvb_ait_application_icons_descriptor *e)
{
return (struct dvb_ait_application_icons_descriptor_part2 *)
((uint8_t *) e + sizeof(struct dvb_ait_application_icons_descriptor) +
e->icon_locator_length);
}
/**
* Accessor for the reserved field of a dvb_ait_application_icons_descriptor_part2.
*
* @param e dvb_ait_application_icons_part2 pointer.
* @return Pointer to the field.
*/
static inline uint8_t *
dvb_ait_application_icons_descriptor_part2_reserved(struct dvb_ait_application_icons_descriptor_part2 *e)
{
return (uint8_t *) e + sizeof(struct dvb_ait_application_icons_descriptor_part2);
}
/**
* Calculate the number of bytes in the reserved field of a dvb_ait_application_icons_descriptor_part2.
*
* @param d dvb_ait_application_icons_descriptorpointer.
* @param part2 dvb_ait_application_icons_descriptor_part2 pointer.
* @return Number of bytes.
*/
static inline int
dvb_ait_application_icons_descriptor_part2_reserved_length(struct dvb_ait_application_icons_descriptor *d,
struct dvb_ait_application_icons_descriptor_part2* part2)
{
uint8_t *ptr = (uint8_t*) part2 + sizeof(struct dvb_ait_application_icons_descriptor_part2);
uint8_t *end = (uint8_t*) d + d->d.len + 2;
return (int) (end - ptr);
}
#ifdef __cplusplus
}
#endif
#endif
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