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/*
Copyright (C) 2006 Adam Charrett
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU 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
nitdecoder.h
Decode Network Information Tables.
*/
#ifndef _NIT_H
#define _NIT_H
#define PID_NIT 0x0010
#define TABLE_ID_NIT_ACTUAL 0x40
#define TABLE_ID_NIT_OTHER 0x41
/*****************************************************************************
* dvbpsi_nit_service_t
*****************************************************************************/
/*!
* \struct dvbpsi_nit_service_s
* \brief NIT service description structure.
*
* This structure is used to store a decoded NIT service description.
* (ETSI EN 300 468 V1.4.1 section 5.2.3).
*/
/*!
* \typedef struct dvbpsi_nit_transport_s dvbpsi_nit_transport_t
* \brief dvbpsi_nit_transport_t type definition.
*/
typedef struct dvbpsi_nit_transport_s
{
uint16_t i_ts_id; /*!< transport_stream_id */
uint16_t i_original_network_id; /*!< original_network_id */
dvbpsi_descriptor_t * p_first_descriptor; /*!< First of the following
DVB descriptors */
struct dvbpsi_nit_transport_s * p_next; /*!< next element of
the list */
} dvbpsi_nit_transport_t;
/*****************************************************************************
* dvbpsi_nit_t
*****************************************************************************/
/*!
* \struct dvbpsi_nit_s
* \brief NIT structure.
*
* This structure is used to store a decoded NIT.
* (ETSI EN 300 468 V1.4.1 section 5.2.1).
*/
/*!
* \typedef struct dvbpsi_nit_s dvbpsi_nit_t
* \brief dvbpsi_nit_t type definition.
*/
typedef struct dvbpsi_nit_s
{
int b_actual; /*!< TRUE if NIT(Actual) or FALSE if NIT(Other)*/
uint16_t i_network_id; /*!< network_id */
uint8_t i_version; /*!< version_number */
int b_current_next; /*!< current_next_indicator */
dvbpsi_descriptor_t * p_first_descriptor; /*!< First of the following Network descriptors */
dvbpsi_nit_transport_t * p_first_transport; /*!< First of the following transports */
} dvbpsi_nit_t;
/*****************************************************************************
* dvbpsi_nit_callback
*****************************************************************************/
/*!
* \typedef void (* dvbpsi_nit_callback)(void* p_cb_data,
dvbpsi_nit_t* p_new_nit)
* \brief Callback type definition.
*/
typedef void (* dvbpsi_nit_callback)(void* p_cb_data, dvbpsi_nit_t* p_new_nit);
/*****************************************************************************
* dvbpsi_AttachNIT
*****************************************************************************/
/*!
* \fn void dvbpsi_AttachNIT(dvbpsi_demux_t * p_demux, uint8_t i_table_id,
uint16_t i_extension, dvbpsi_nit_callback pf_callback,
void* p_cb_data)
* \brief Creation and initialization of a NIT decoder.
* \param p_demux Subtable demultiplexor to which the decoder is attached.
* \param i_table_id Table ID, 0x40 or 0x41.
* \param i_extension Table ID extension, here Network ID.
* \param pf_callback function to call back on new NIT.
* \param p_cb_data private data given in argument to the callback.
* \return 0 if everything went ok.
*/
int dvbpsi_AttachNIT(dvbpsi_decoder_t * p_psi_decoder, uint8_t i_table_id,
uint16_t i_extension, dvbpsi_nit_callback pf_callback,
void* p_cb_data);
/*****************************************************************************
* dvbpsi_DetachNIT
*****************************************************************************/
/*!
* \fn void dvbpsi_DetachNIT(dvbpsi_demux_t * p_demux, uint8_t i_table_id,
uint16_t i_extension)
* \brief Destroy a NIT decoder.
* \param p_demux Subtable demultiplexor to which the decoder is attached.
* \param i_table_id Table ID, 0x42 or 0x46.
* \param i_extension Table ID extension, here TS ID.
* \return nothing.
*/
void dvbpsi_DetachNIT(dvbpsi_demux_t * p_demux, uint8_t i_table_id,
uint16_t i_extension);
/*****************************************************************************
* dvbpsi_InitNIT/dvbpsi_NewNIT
*****************************************************************************/
/*!
* \fn void dvbpsi_InitNIT(dvbpsi_nit_t* p_nit, uint16_t i_network_id,
uint8_t i_version, int b_current_next)
* \brief Initialize a user-allocated dvbpsi_nit_t structure.
* \param p_nit pointer to the NIT structure
* \param b_actual True if this is the NIT(actual), false if NIT(other)
* \param i_network_id network id
* \param i_version NIT version
* \param b_current_next current next indicator
* \return nothing.
*/
void dvbpsi_InitNIT(dvbpsi_nit_t *p_nit, int b_actual, uint16_t i_network_id,
uint8_t i_version, int b_current_next);
/*!
* \def dvbpsi_NewNIT(p_nit, i_network_id, i_version, b_current_next)
* \brief Allocate and initialize a new dvbpsi_nit_t structure. Use ObjectRefDec to release delete it.
* \param p_nit pointer to the NIT structure
* \param i_network_id network id
* \param i_version NIT version
* \param b_current_next current next indicator
* \return nothing.
*/
#define dvbpsi_NewNIT(p_nit, b_actual, i_network_id, i_version, b_current_next) \
do { \
ObjectRegisterTypeDestructor(dvbpsi_nit_t, (ObjectDestructor_t)dvbpsi_EmptyNIT); \
p_nit = (dvbpsi_nit_t*)ObjectCreateType(dvbpsi_nit_t); \
if(p_nit != NULL) \
dvbpsi_InitNIT(p_nit, b_actual, i_network_id, i_version, b_current_next); \
} while(0);
/*****************************************************************************
* dvbpsi_EmptyNIT
*****************************************************************************/
/*!
* \fn void dvbpsi_EmptyNIT(dvbpsi_nit_t* p_nit)
* \brief Clean a dvbpsi_nit_t structure.
* \param p_nit pointer to the NIT structure
* \return nothing.
*/
void dvbpsi_EmptyNIT(dvbpsi_nit_t *p_nit);
#endif
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