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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_ATSC_DCCSCT_SECTION_H
#define _UCSI_ATSC_DCCSCT_SECTION_H 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/atsc/section.h>
#include <libucsi/atsc/types.h>
enum atsc_dccst_update_types {
ATSC_DCCST_UPDATE_NEW_GENRE = 0x01,
ATSC_DCCST_UPDATE_NEW_STATE = 0x02,
ATSC_DCCST_UPDATE_NEW_COUNTY = 0x03,
};
/**
* atsc_dccsct_section structure.
*/
struct atsc_dccsct_section {
struct atsc_section_psip head;
uint8_t updates_defined;
/* struct atsc_dccsct_update updates */
/* struct atsc_dccsct_section_part2 part2 */
} __ucsi_packed;
struct atsc_dccsct_update {
uint8_t update_type;
uint8_t update_data_length;
/* struct atsc_dccsct_update_XXX data -- depends on update_type */
/* struct atsc_dccsct_update_part2 part2 */
} __ucsi_packed;
struct atsc_dccsct_update_new_genre {
uint8_t genre_category_code;
/* atsc_text name */
} __ucsi_packed;
struct atsc_dccsct_update_new_state {
uint8_t dcc_state_location_code;
/* atsc_text name */
} __ucsi_packed;
struct atsc_dccsct_update_new_county {
uint8_t state_code;
EBIT2(uint16_t reserved : 6; ,
uint16_t dcc_county_location_code :10; );
/* atsc_text name */
} __ucsi_packed;
struct atsc_dccsct_update_part2 {
EBIT2(uint16_t reserved : 6; ,
uint16_t descriptors_length :10; );
/* struct descriptor descriptors[] */
} __ucsi_packed;
struct atsc_dccsct_section_part2 {
EBIT2(uint16_t reserved : 6; ,
uint16_t descriptors_length :10; );
/* struct descriptor descriptors[] */
} __ucsi_packed;
/**
* Process an atsc_dccsct_section.
*
* @param section Pointer to an atsc_section_psip structure.
* @return atsc_dccsct_section pointer, or NULL on error.
*/
struct atsc_dccsct_section *atsc_dccsct_section_codec(struct atsc_section_psip *section);
/**
* Accessor for the dccsct_type field of a dccsct.
*
* @param dccsct dccsct pointer.
* @return The dccsct_type.
*/
static inline uint16_t atsc_dccsct_section_dccsct_type(struct atsc_dccsct_section *dccsct)
{
return dccsct->head.ext_head.table_id_ext;
}
/**
* Iterator for the updates field in an atsc_dccsct_section.
*
* @param dccsct atsc_dccsct_section pointer.
* @param pos Variable containing a pointer to the current atsc_dccsct_update.
* @param idx Integer used to count which test we are in.
*/
#define atsc_dccsct_section_updates_for_each(dccsct, pos, idx) \
for ((pos) = atsc_dccsct_section_updates_first(dccsct), idx=0; \
(pos); \
(pos) = atsc_dccsct_section_updates_next(dccsct, pos, ++idx))
/**
* Accessor for the data field of a new genre atsc_dccsct_update.
*
* @param update atsc_dccsct_update pointer.
* @return struct atsc_dccsct_update_new_genre pointer.
*/
static inline struct atsc_dccsct_update_new_genre *atsc_dccsct_update_new_genre(struct atsc_dccsct_update *update)
{
if (update->update_type != ATSC_DCCST_UPDATE_NEW_GENRE)
return NULL;
return (struct atsc_dccsct_update_new_genre *)
(((uint8_t*) update) + sizeof(struct atsc_dccsct_update));
}
/**
* Accessor for the name field of an atsc_dccsct_update_new_genre.
*
* @param update atsc_dccsct_update_new_genre pointer.
* @return text pointer.
*/
static inline struct atsc_text *atsc_dccsct_update_new_genre_name(struct atsc_dccsct_update *update)
{
if ((update->update_data_length - 1) == 0)
return NULL;
return (struct atsc_text *)
(((uint8_t*) update) + sizeof(struct atsc_dccsct_update_new_genre));
}
/**
* Accessor for the data field of a new state atsc_dccsct_update.
*
* @param update atsc_dccsct_update pointer.
* @return struct atsc_dccsct_update_new_state pointer.
*/
static inline struct atsc_dccsct_update_new_state *
atsc_dccsct_update_new_state(struct atsc_dccsct_update *update)
{
if (update->update_type != ATSC_DCCST_UPDATE_NEW_STATE)
return NULL;
return (struct atsc_dccsct_update_new_state *)
(((uint8_t*) update) + sizeof(struct atsc_dccsct_update));
}
/**
* Accessor for the name field of an atsc_dccsct_update_new_state.
*
* @param update atsc_dccsct_update_new_state pointer.
* @return text pointer.
*/
static inline struct atsc_text *atsc_dccsct_update_new_state_name(struct atsc_dccsct_update *update)
{
if ((update->update_data_length - 1) == 0)
return NULL;
return (struct atsc_text *)
(((uint8_t*) update) + sizeof(struct atsc_dccsct_update_new_state));
}
/**
* Accessor for the data field of a new county atsc_dccsct_update.
*
* @param update atsc_dccsct_update pointer.
* @return struct atsc_dccsct_update_new_county pointer.
*/
static inline struct atsc_dccsct_update_new_county *
atsc_dccsct_update_new_county(struct atsc_dccsct_update *update)
{
if (update->update_type != ATSC_DCCST_UPDATE_NEW_COUNTY)
return NULL;
return (struct atsc_dccsct_update_new_county *)
(((uint8_t*) update) + sizeof(struct atsc_dccsct_update));
}
/**
* Accessor for the name field of an atsc_dccsct_update_new_county.
*
* @param update atsc_dccsct_update_new_county pointer.
* @return text pointer.
*/
static inline struct atsc_text *atsc_dccsct_update_new_county_name(struct atsc_dccsct_update *update)
{
if ((update->update_data_length - 3) == 0)
return NULL;
return (struct atsc_text*)
(((uint8_t*) update) + sizeof(struct atsc_dccsct_update_new_county));
}
/**
* Accessor for the part2 field of an atsc_dccsct_update.
*
* @param update atsc_dccsct_update pointer.
* @return struct atsc_dccsct_test_part2 pointer.
*/
static inline struct atsc_dccsct_update_part2 *atsc_dccsct_update_part2(struct atsc_dccsct_update *update)
{
int pos = sizeof(struct atsc_dccsct_update);
pos += update->update_data_length;
return (struct atsc_dccsct_update_part2 *) (((uint8_t*) update) + pos);
}
/**
* Iterator for the descriptors field in an atsc_dccsct_update_part2 structure.
*
* @param part2 atsc_dccsct_update_part2 pointer.
* @param pos Variable containing a pointer to the current descriptor.
*/
#define atsc_dccsct_update_part2_descriptors_for_each(part2, pos) \
for ((pos) = atsc_dccsct_update_part2_descriptors_first(part2); \
(pos); \
(pos) = atsc_dccsct_update_part2_descriptors_next(part2, pos))
/**
* Iterator for the descriptors field in a atsc_dccsct_section_part2 structure.
*
* @param part2 atsc_dccsct_section_part2 pointer.
* @param pos Variable containing a pointer to the current descriptor.
*/
#define atsc_dccsct_section_part2_descriptors_for_each(part2, pos) \
for ((pos) = atsc_dccsct_section_part2_descriptors_first(part2); \
(pos); \
(pos) = atsc_dccsct_section_part2_descriptors_next(part2, pos))
/******************************** PRIVATE CODE ********************************/
static inline struct atsc_dccsct_update *
atsc_dccsct_section_updates_first(struct atsc_dccsct_section *dccsct)
{
size_t pos = sizeof(struct atsc_dccsct_section);
if (dccsct->updates_defined == 0)
return NULL;
return (struct atsc_dccsct_update*) (((uint8_t *) dccsct) + pos);
}
static inline struct atsc_dccsct_update*
atsc_dccsct_section_updates_next(struct atsc_dccsct_section *dccsct,
struct atsc_dccsct_update *pos,
int idx)
{
if (idx >= dccsct->updates_defined)
return NULL;
struct atsc_dccsct_update_part2 *part2 = atsc_dccsct_update_part2(pos);
int len = sizeof(struct atsc_dccsct_update_part2);
len += part2->descriptors_length;
return (struct atsc_dccsct_update *) (((uint8_t*) part2) + len);
}
static inline struct descriptor *
atsc_dccsct_update_part2_descriptors_first(struct atsc_dccsct_update_part2 *part2)
{
size_t pos = sizeof(struct atsc_dccsct_update_part2);
if (part2->descriptors_length == 0)
return NULL;
return (struct descriptor*) (((uint8_t *) part2) + pos);
}
static inline struct descriptor *
atsc_dccsct_update_part2_descriptors_next(struct atsc_dccsct_update_part2 *part2,
struct descriptor *pos)
{
return next_descriptor((uint8_t*) part2 + sizeof(struct atsc_dccsct_update_part2),
part2->descriptors_length,
pos);
}
static inline struct descriptor *
atsc_dccsct_section_part2_descriptors_first(struct atsc_dccsct_section_part2 *part2)
{
size_t pos = sizeof(struct atsc_dccsct_section_part2);
if (part2->descriptors_length == 0)
return NULL;
return (struct descriptor*) (((uint8_t *) part2) + pos);
}
static inline struct descriptor *
atsc_dccsct_section_part2_descriptors_next(struct atsc_dccsct_section_part2 *part2,
struct descriptor *pos)
{
return next_descriptor((uint8_t*) part2 + sizeof(struct atsc_dccsct_section_part2),
part2->descriptors_length,
pos);
}
#ifdef __cplusplus
}
#endif
#endif
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