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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)
* Copyright (C) 2005 Patrick Boettcher (pb@linuxtv.org)
*
* 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_INT_SECTION_H
#define _UCSI_DVB_INT_SECTION_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/section.h>
/**
* dvb_int_section structure - IP/MAC notification section.
*/
struct dvb_int_section {
struct section_ext head;
EBIT2(uint32_t platform_id :24; ,
uint32_t processing_order : 8; );
EBIT2(uint16_t reserved2 : 4; ,
uint16_t platform_descriptors_length :12; );
/* struct descriptor platform_descriptors[] */
/* struct dvb_int_target target_loop[] */
} __ucsi_packed;
/**
* An entry in the target_loop field of a dvb_int_section.
*/
struct dvb_int_target {
EBIT2(uint16_t reserved3 : 4; ,
uint16_t target_descriptors_length :12; );
/* struct descriptor target_descriptors[] */
/* struct dvb_int_operational_loop operational_loop */
} __ucsi_packed;
/**
* The operational_loop field in a dvb_int_target.
*/
struct dvb_int_operational_loop {
EBIT2(uint16_t reserved4 : 4; ,
uint16_t operational_descriptors_length :12; );
/* struct descriptor operational_descriptors[] */
} __ucsi_packed;
/**
* Process a dvb_int_section.
*
* @param section Generic section_ext pointer.
* @return dvb_int_section pointer, or NULL on error.
*/
extern struct dvb_int_section * dvb_int_section_codec(struct section_ext *section);
/**
* Accessor for the action_type field of an INT.
*
* @param intp INT pointer.
* @return The action_type.
*/
static inline uint8_t dvb_int_section_action_type(struct dvb_int_section *intp)
{
return intp->head.table_id_ext >> 8;
}
/**
* Accessor for the platform_id_hash field of an INT.
*
* @param intp INT pointer.
* @return The platform_id_hash.
*/
static inline uint8_t dvb_int_section_platform_id_hash(struct dvb_int_section *intp)
{
return intp->head.table_id_ext & 0xff;
}
/**
* Iterator for platform_descriptors field in a dvb_int_section.
*
* @param intp dvb_int_section pointer.
* @param pos Variable holding a pointer to the current descriptor.
*/
#define dvb_int_section_platform_descriptors_for_each(intp, pos) \
for ((pos) = dvb_int_section_platform_descriptors_first(intp); \
(pos); \
(pos) = dvb_int_section_platform_descriptors_next(intp, pos))
/**
* Iterator for the target_loop field in a dvb_int_section.
*
* @param intp dvb_int_section pointer.
* @param pos Variable holding a pointer to the current dvb_int_target.
*/
#define dvb_int_section_target_loop_for_each(intp,pos) \
for ((pos) = dvb_int_section_target_loop_first(intp); \
(pos); \
(pos) = dvb_int_section_target_loop_next(intp, pos))
/**
* Iterator for the target_descriptors field in a dvb_int_target.
*
* @param target dvb_int_target pointer.
* @param pos Variable holding a pointer to the current descriptor.
*/
#define dvb_int_target_target_descriptors_for_each(target, pos) \
for ((pos) = dvb_int_target_target_descriptors_first(target); \
(pos); \
(pos) = dvb_int_target_target_descriptors_next(target, pos))
/**
* Accessor for the operational_loop field of a dvb_int_target.
*
* @param target dvb_int_target pointer.
* @return Pointer to a dvb_int_operational_loop.
*/
static inline struct dvb_int_operational_loop *
dvb_int_target_operational_loop(struct dvb_int_target *target)
{
return (struct dvb_int_operational_loop *)
((uint8_t *) target + sizeof(struct dvb_int_target) + target->target_descriptors_length);
}
/**
* Iterator for the operational_descriptors field in a dvb_int_operational_loop.
*
* @param oploop dvb_int_operational_loop pointer.
* @param pos Variable holding a pointer to the current descriptor.
*/
#define dvb_int_operational_loop_operational_descriptors_for_each(oploop, pos) \
for ((pos) = dvb_int_operational_loop_operational_descriptors_first(oploop); \
(pos); \
(pos) = dvb_int_operational_loop_operational_descriptors_next(oploop, pos))
/******************************** PRIVATE CODE ********************************/
static inline struct descriptor *
dvb_int_section_platform_descriptors_first(struct dvb_int_section *in)
{
if (in->platform_descriptors_length == 0)
return NULL;
return (struct descriptor *)
((uint8_t *) in + sizeof(struct dvb_int_section));
}
static inline struct descriptor *
dvb_int_section_platform_descriptors_next(struct dvb_int_section *in,
struct descriptor* pos)
{
return next_descriptor((uint8_t*) in + sizeof(struct dvb_int_section),
in->platform_descriptors_length,
pos);
}
static inline struct dvb_int_target *
dvb_int_section_target_loop_first(struct dvb_int_section *in)
{
if (sizeof(struct dvb_int_section) + in->platform_descriptors_length >= (uint32_t) section_ext_length((struct section_ext *) in))
return NULL;
return (struct dvb_int_target *)
((uint8_t *) in + sizeof(struct dvb_int_section) + in->platform_descriptors_length);
}
static inline struct dvb_int_target *
dvb_int_section_target_loop_next(struct dvb_int_section *in,
struct dvb_int_target *pos)
{
struct dvb_int_operational_loop *ol = dvb_int_target_operational_loop(pos);
struct dvb_int_target *next =
(struct dvb_int_target *) ( (uint8_t *) pos +
sizeof(struct dvb_int_target) + pos->target_descriptors_length +
sizeof(struct dvb_int_operational_loop) + ol->operational_descriptors_length);
struct dvb_int_target *end =
(struct dvb_int_target *) ((uint8_t *) in + section_ext_length((struct section_ext *) in) );
if (next >= end)
return 0;
return next;
}
static inline struct descriptor *
dvb_int_target_target_descriptors_first(struct dvb_int_target *tl)
{
if (tl->target_descriptors_length == 0)
return NULL;
return (struct descriptor *)
((uint8_t *) tl + sizeof(struct dvb_int_target));
}
static inline struct descriptor *
dvb_int_target_target_descriptors_next(struct dvb_int_target *tl,
struct descriptor* pos)
{
return next_descriptor((uint8_t*) tl + sizeof(struct dvb_int_target),
tl->target_descriptors_length,
pos);
}
static inline struct descriptor *
dvb_int_operational_loop_operational_descriptors_first(struct dvb_int_operational_loop *ol)
{
if (ol->operational_descriptors_length == 0)
return NULL;
return (struct descriptor *)
((uint8_t *) ol + sizeof(struct dvb_int_operational_loop));
}
static inline struct descriptor *
dvb_int_operational_loop_operational_descriptors_next(struct dvb_int_operational_loop *ol,
struct descriptor* pos)
{
return next_descriptor((uint8_t*) ol + sizeof(struct dvb_int_operational_loop),
ol->operational_descriptors_length,
pos);
}
#ifdef __cplusplus
}
#endif
#endif
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