nit.h

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/*
 * Copyright (c) 2011-2012 - Mauro Carvalho Chehab
 * Copyright (c) 2012 - Andre Roth <neolynx@gmail.com>
 *
 * This program 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 version 2.1 of the License.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 */
 
#ifndef _NIT_H
#define _NIT_H
 
#include <stdint.h>
#include <unistd.h> /* ssize_t */
 
#include <libdvbv5/header.h>
#include <libdvbv5/descriptors.h>
 
#define DVB_TABLE_NIT      0x40
#define DVB_TABLE_NIT2     0x41
#define DVB_TABLE_NIT_PID  0x10
 
union dvb_table_nit_transport_header {
        uint16_t bitfield;
        struct {
                uint16_t transport_length:12;
                uint16_t reserved:4;
        } __attribute__((packed));
} __attribute__((packed));
 
struct dvb_table_nit_transport {
        uint16_t transport_id;
        uint16_t network_id;
        union {
                uint16_t bitfield;
                struct {
                        uint16_t desc_length:12;
                        uint16_t reserved:4;
                } __attribute__((packed));
        } __attribute__((packed));
        struct dvb_desc *descriptor;
        struct dvb_table_nit_transport *next;
} __attribute__((packed));
 
struct dvb_table_nit {
        struct dvb_table_header header;
        union {
                uint16_t bitfield;
                struct {
                        uint16_t desc_length:12;
                        uint16_t reserved:4;
                } __attribute__((packed));
        } __attribute__((packed));
        struct dvb_desc *descriptor;
        struct dvb_table_nit_transport *transport;
} __attribute__((packed));
 
typedef void nit_handler_callback_t(struct dvb_table_nit *nit,
                                    struct dvb_desc *desc,
                                    void *priv);
 
typedef void nit_tran_handler_callback_t(struct dvb_table_nit *nit,
                                         struct dvb_table_nit_transport *tran,
                                         struct dvb_desc *desc,
                                         void *priv);
 
#define dvb_nit_transport_foreach( _tran, _nit ) \
        if (_nit && _nit->transport) \
                for (struct dvb_table_nit_transport *_tran = _nit->transport; _tran; _tran = _tran->next) \
 
struct dvb_v5_fe_parms;
 
#ifdef __cplusplus
extern "C" {
#endif
 
ssize_t dvb_table_nit_init (struct dvb_v5_fe_parms *parms, const uint8_t *buf,
                            ssize_t buflen, struct dvb_table_nit **table);
 
void dvb_table_nit_free(struct dvb_table_nit *table);
 
void dvb_table_nit_print(struct dvb_v5_fe_parms *parms, struct dvb_table_nit *table);
 
void dvb_table_nit_descriptor_handler(
                            struct dvb_v5_fe_parms *parms,
                            struct dvb_table_nit *table,
                            enum descriptors descriptor,
                            nit_handler_callback_t *call_nit,
                            nit_tran_handler_callback_t *call_tran,
                            void *priv);
 
#ifdef __cplusplus
}
#endif
 
#endif