/*
* parse_si_sdt.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_sdt.h"
#include "descriptors/parse_desc.h"
/*=============================================================================================*/
// CONSTANTS
/*=============================================================================================*/
/*=============================================================================================*/
// MACROS
/*=============================================================================================*/
/*=============================================================================================*/
// FUNCTIONS
/*=============================================================================================*/
/* ----------------------------------------------------------------------- */
//
// service_description_section(){
// table_id 8 uimsbf
// section_syntax_indicator 1 bslbf
// reserved_future_use 1 bslbf
// reserved 2 bslbf
// section_length 12 uimsbf
// transport_stream_id 16 uimsbf
// reserved 2 bslbf
// version_number 5 uimsbf
// current_next_indicator 1 bslbf
// section_number 8 uimsbf
// last_section_number 8 uimsbf
// original_network_id 16 uimsbf
// reserved_future_use 8 bslbf
// for (i=0;i<N;i++){
// service_id 16 uimsbf
// reserved_future_use 6 bslbf
// EIT_schedule_flag 1 bslbf
// EIT_present_following_flag 1 bslbf
// running_status 3 uimsbf
// free_CA_mode 1 bslbf
// descriptors_loop_length 12 uimsbf
// for (j=0;j<N;j++){
// descriptor()
// }
// }
// CRC_32 32 rpchof
// }
/* ----------------------------------------------------------------------- */
void print_sdt(struct Section_service_description *sdt)
{
struct list_head *item, *safe;
int end_buff_len ;
printf("Table: service_description [0x%02x]\n", sdt->table_id) ;
printf("Length: %d\n", sdt->section_length) ;
//== data ==
printf("section_syntax_indicator = %d\n", sdt->section_syntax_indicator) ;
printf("transport_stream_id = %d\n", sdt->transport_stream_id) ;
printf("version_number = %d\n", sdt->version_number) ;
printf("current_next_indicator = %d\n", sdt->current_next_indicator) ;
printf("section_number = %d\n", sdt->section_number) ;
printf("last_section_number = %d\n", sdt->last_section_number) ;
printf("original_network_id = %d\n", sdt->original_network_id) ;
list_for_each_safe(item,safe,&sdt->sdt_array) {
struct SDT_entry *sdt_entry = list_entry(item, struct SDT_entry, next);
// SDT entry
printf(" -SDT entry-\n") ;
printf(" service_id = %d\n", sdt_entry->service_id) ;
printf(" EIT_schedule_flag = %d\n", sdt_entry->EIT_schedule_flag) ;
printf(" EIT_present_following_flag = %d\n", sdt_entry->EIT_present_following_flag) ;
printf(" running_status = %d\n", sdt_entry->running_status) ;
printf(" free_CA_mode = %d\n", sdt_entry->free_CA_mode) ;
printf(" descriptors_loop_length = %d\n", sdt_entry->descriptors_loop_length) ;
// Descriptors list
print_desc_list(&sdt_entry->descriptors_array, 1) ;
}
}
/* ----------------------------------------------------------------------- */
void parse_sdt(struct TS_reader *tsreader, struct TS_state *tsstate, struct TS_bits *bits,
Section_handler handler, struct Section_decode_flags *flags)
{
struct Section_service_description sdt ;
struct list_head *item, *safe;
unsigned byte ;
int end_buff_len ;
//== Parse data ==
sdt.table_id = bits_get(bits, 8) ;
sdt.section_syntax_indicator = bits_get(bits, 1) ;
bits_skip(bits, 1) ;
bits_skip(bits, 2) ;
sdt.section_length = bits_get(bits, 12) ;
sdt.transport_stream_id = bits_get(bits, 16) ;
bits_skip(bits, 2) ;
sdt.version_number = bits_get(bits, 5) ;
sdt.current_next_indicator = bits_get(bits, 1) ;
sdt.section_number = bits_get(bits, 8) ;
sdt.last_section_number = bits_get(bits, 8) ;
sdt.original_network_id = bits_get(bits, 16) ;
bits_skip(bits, 8) ;
INIT_LIST_HEAD(&sdt.sdt_array) ;
while (bits->buff_len >= 5)
{
struct SDT_entry *sdt_entry = malloc(sizeof(*sdt_entry));
memset(sdt_entry,0,sizeof(*sdt_entry));
list_add_tail(&sdt_entry->next,&sdt.sdt_array);
sdt_entry->service_id = bits_get(bits, 16) ;
bits_skip(bits, 6) ;
sdt_entry->EIT_schedule_flag = bits_get(bits, 1) ;
sdt_entry->EIT_present_following_flag = bits_get(bits, 1) ;
sdt_entry->running_status = bits_get(bits, 3) ;
sdt_entry->free_CA_mode = bits_get(bits, 1) ;
sdt_entry->descriptors_loop_length = bits_get(bits, 12) ;
// Descriptors
INIT_LIST_HEAD(&sdt_entry->descriptors_array);
end_buff_len = bits_len_calc(bits, -sdt_entry->descriptors_loop_length ) ;
while (bits->buff_len > end_buff_len)
{
enum TS_descriptor_ids desc_tag = parse_desc(&sdt_entry->descriptors_array, bits, flags->decode_descriptor) ;
}
}
//== Call handler ==
if (handler)
handler(tsreader, tsstate, (struct Section *)&sdt, tsreader->user_data) ;
//== Tidy up ==
list_for_each_safe(item,safe,&sdt.sdt_array) {
struct SDT_entry *sdt_entry = list_entry(item, struct SDT_entry, next);
free_descriptors_list(&sdt_entry->descriptors_array);
free(sdt_entry) ;
}
}