/*
* parse_si_nit.c
*
* Created by: si_desc.pl
* Created on: 20-May-2011
* Author: sdprice1
*/
// VERSION = 1.00
/*=============================================================================================*/
// USES
/*=============================================================================================*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <inttypes.h>
#include "parse_si_nit.h"
#include "descriptors/parse_desc.h"
/*=============================================================================================*/
// CONSTANTS
/*=============================================================================================*/
/*=============================================================================================*/
// MACROS
/*=============================================================================================*/
/*=============================================================================================*/
// FUNCTIONS
/*=============================================================================================*/
/* ----------------------------------------------------------------------- */
//
// network_information_section(){
// table_id 8 uimsbf
// section_syntax_indicator 1 bslbf
// reserved_future_use 1 bslbf
// reserved 2 bslbf
// section_length 12 uimsbf
// network_id 16 uimsbf
// reserved 2 bslbf
// version_number 5 uimsbf
// current_next_indicator 1 bslbf
// section_number 8 uimsbf
// last_section_number 8 uimsbf
// reserved_future_use 4 bslbf
// network_descriptors_length 12 uimsbf
// for(i=0;i<N;i++){
// descriptor()
// }
// reserved_future_use 4 bslbf
// transport_stream_loop_length 12 uimsbf
// for(i=0;i<N;i++){
// transport_stream_id 16 uimsbf
// original_network_id 16 uimsbf
// reserved_future_use 4 bslbf
// transport_descriptors_length 12 uimsbf
// for(j=0;j<N;j++){
// descriptor()
// }
// }
// CRC_32 32 rpchof
// }
/* ----------------------------------------------------------------------- */
void print_nit(struct Section_network_information *nit)
{
struct list_head *item, *safe;
int end_buff_len ;
printf("Table: network_information [0x%02x]\n", nit->table_id) ;
printf("Length: %d\n", nit->section_length) ;
//== data ==
printf("section_syntax_indicator = %d\n", nit->section_syntax_indicator) ;
printf("network_id = %d\n", nit->network_id) ;
printf("version_number = %d\n", nit->version_number) ;
printf("current_next_indicator = %d\n", nit->current_next_indicator) ;
printf("section_number = %d\n", nit->section_number) ;
printf("last_section_number = %d\n", nit->last_section_number) ;
printf("network_descriptors_length = %d\n", nit->network_descriptors_length) ;
// Descriptors list
print_desc_list(&nit->network_array, 1) ;
printf("transport_stream_loop_length = %d\n", nit->transport_stream_loop_length) ;
list_for_each_safe(item,safe,&nit->nit_array) {
struct NIT_entry *nit_entry = list_entry(item, struct NIT_entry, next);
// NIT entry
printf(" -NIT entry-\n") ;
printf(" transport_stream_id = %d\n", nit_entry->transport_stream_id) ;
printf(" original_network_id = %d\n", nit_entry->original_network_id) ;
printf(" transport_descriptors_length = %d\n", nit_entry->transport_descriptors_length) ;
// Descriptors list
print_desc_list(&nit_entry->transport_array, 1) ;
}
}
/* ----------------------------------------------------------------------- */
void parse_nit(struct TS_reader *tsreader, struct TS_state *tsstate, struct TS_bits *bits,
Section_handler handler, struct Section_decode_flags *flags)
{
struct Section_network_information nit ;
struct list_head *item, *safe;
unsigned byte ;
int end_buff_len ;
//== Parse data ==
nit.table_id = bits_get(bits, 8) ;
nit.section_syntax_indicator = bits_get(bits, 1) ;
bits_skip(bits, 1) ;
bits_skip(bits, 2) ;
nit.section_length = bits_get(bits, 12) ;
nit.network_id = bits_get(bits, 16) ;
bits_skip(bits, 2) ;
nit.version_number = bits_get(bits, 5) ;
nit.current_next_indicator = bits_get(bits, 1) ;
nit.section_number = bits_get(bits, 8) ;
nit.last_section_number = bits_get(bits, 8) ;
bits_skip(bits, 4) ;
nit.network_descriptors_length = bits_get(bits, 12) ;
// Descriptors
INIT_LIST_HEAD(&nit.network_array);
end_buff_len = bits_len_calc(bits, -nit.network_descriptors_length ) ;
while (bits->buff_len > end_buff_len)
{
enum TS_descriptor_ids desc_tag = parse_desc(&nit.network_array, bits, flags->decode_descriptor) ;
}
bits_skip(bits, 4) ;
nit.transport_stream_loop_length = bits_get(bits, 12) ;
INIT_LIST_HEAD(&nit.nit_array) ;
while (bits->buff_len >= 6)
{
struct NIT_entry *nit_entry = malloc(sizeof(*nit_entry));
memset(nit_entry,0,sizeof(*nit_entry));
list_add_tail(&nit_entry->next,&nit.nit_array);
nit_entry->transport_stream_id = bits_get(bits, 16) ;
nit_entry->original_network_id = bits_get(bits, 16) ;
bits_skip(bits, 4) ;
nit_entry->transport_descriptors_length = bits_get(bits, 12) ;
// Descriptors
INIT_LIST_HEAD(&nit_entry->transport_array);
end_buff_len = bits_len_calc(bits, -nit_entry->transport_descriptors_length ) ;
while (bits->buff_len > end_buff_len)
{
enum TS_descriptor_ids desc_tag = parse_desc(&nit_entry->transport_array, bits, flags->decode_descriptor) ;
}
}
//== Call handler ==
if (handler)
handler(tsreader, tsstate, (struct Section *)&nit, tsreader->user_data) ;
//== Tidy up ==
free_descriptors_list(&nit.network_array);
list_for_each_safe(item,safe,&nit.nit_array) {
struct NIT_entry *nit_entry = list_entry(item, struct NIT_entry, next);
free_descriptors_list(&nit_entry->transport_array);
free(nit_entry) ;
}
}