You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
246 lines
7.3 KiB
246 lines
7.3 KiB
/*
|
|
* 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
|