/*
* parse_si_cit.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_cit.h"
#include "descriptors/parse_desc.h"
/*=============================================================================================*/
// CONSTANTS
/*=============================================================================================*/
/*=============================================================================================*/
// MACROS
/*=============================================================================================*/
/*=============================================================================================*/
// FUNCTIONS
/*=============================================================================================*/
/* ----------------------------------------------------------------------- */
//
// content_identifier_section() {
// table_id 8 uimsbf
// section_syntax_indicator 1 bslbf
// private_indicator 1 bslbf
// reserved 2 bslbf
// section_length 12 uimsbf
// service_id 16 uimsbf
// reserved 2 bslbf
// version_number 5 uimsbf
// current_next_indicator 1 bslbf
// section_number 8 uimsbf
// last_section_number 8 uimsbf
// transport_stream_id 16 uimsbf
// original_network_id 16 uimsbf
// prepend_strings_length 8 uimsbf
// for (i=0; i< prepend_strings_length ; i++) {
// prepend_strings_byte 8 uimsbf
// }
// for (j=0; j<N; j++) {
// crid_ref 16 uimsbf
// prepend_string_index 8 uimsbf
// unique_string_length 8 uimsbf
// for (k=0; k<unique_string_length; k++) {
// unique_string_byte 8 uimsbf
// }
// }
// CRC32 32 rpchof
// }
/* ----------------------------------------------------------------------- */
void print_cit(struct Section_content_identifier *cit)
{
struct list_head *item, *safe;
int end_buff_len ;
printf("Table: content_identifier [0x%02x]\n", cit->table_id) ;
printf("Length: %d\n", cit->section_length) ;
//== data ==
printf("section_syntax_indicator = %d\n", cit->section_syntax_indicator) ;
printf("private_indicator = %d\n", cit->private_indicator) ;
printf("service_id = %d\n", cit->service_id) ;
printf("version_number = %d\n", cit->version_number) ;
printf("current_next_indicator = %d\n", cit->current_next_indicator) ;
printf("section_number = %d\n", cit->section_number) ;
printf("last_section_number = %d\n", cit->last_section_number) ;
printf("transport_stream_id = %d\n", cit->transport_stream_id) ;
printf("original_network_id = %d\n", cit->original_network_id) ;
printf("prepend_strings_length = %d\n", cit->prepend_strings_length) ;
printf("prepend_strings = \"%s\"\n", cit->prepend_strings) ;
list_for_each_safe(item,safe,&cit->cit_array) {
struct CIT_entry *cit_entry = list_entry(item, struct CIT_entry, next);
// CIT entry
printf(" -CIT entry-\n") ;
printf(" crid_ref = %d\n", cit_entry->crid_ref) ;
printf(" prepend_string_index = %d\n", cit_entry->prepend_string_index) ;
printf(" unique_string_length = %d\n", cit_entry->unique_string_length) ;
printf(" unique_string = \"%s\"\n", cit_entry->unique_string) ;
}
}
/* ----------------------------------------------------------------------- */
void parse_cit(struct TS_reader *tsreader, struct TS_state *tsstate, struct TS_bits *bits,
Section_handler handler, struct Section_decode_flags *flags)
{
struct Section_content_identifier cit ;
struct list_head *item, *safe;
unsigned byte ;
int end_buff_len ;
//== Parse data ==
cit.table_id = bits_get(bits, 8) ;
cit.section_syntax_indicator = bits_get(bits, 1) ;
cit.private_indicator = bits_get(bits, 1) ;
bits_skip(bits, 2) ;
cit.section_length = bits_get(bits, 12) ;
cit.service_id = bits_get(bits, 16) ;
bits_skip(bits, 2) ;
cit.version_number = bits_get(bits, 5) ;
cit.current_next_indicator = bits_get(bits, 1) ;
cit.section_number = bits_get(bits, 8) ;
cit.last_section_number = bits_get(bits, 8) ;
cit.transport_stream_id = bits_get(bits, 16) ;
cit.original_network_id = bits_get(bits, 16) ;
cit.prepend_strings_length = bits_get(bits, 8) ;
end_buff_len = bits_len_calc(bits, -cit.prepend_strings_length) ;
cit.prepend_strings[0] = 0 ;
for (byte=0; (bits->buff_len > end_buff_len) && (byte < MAX_PREPEND_STRINGS_LEN); ++byte)
{
cit.prepend_strings[byte] = bits_get(bits, 8) ;
cit.prepend_strings[byte+1] = 0 ;
}
INIT_LIST_HEAD(&cit.cit_array) ;
while (bits->buff_len >= 4)
{
struct CIT_entry *cit_entry = malloc(sizeof(*cit_entry));
memset(cit_entry,0,sizeof(*cit_entry));
list_add_tail(&cit_entry->next,&cit.cit_array);
cit_entry->crid_ref = bits_get(bits, 16) ;
cit_entry->prepend_string_index = bits_get(bits, 8) ;
cit_entry->unique_string_length = bits_get(bits, 8) ;
end_buff_len = bits_len_calc(bits, -cit_entry->unique_string_length) ;
cit_entry->unique_string[0] = 0 ;
for (byte=0; (bits->buff_len > end_buff_len) && (byte < MAX_UNIQUE_STRING_LEN); ++byte)
{
cit_entry->unique_string[byte] = bits_get(bits, 8) ;
cit_entry->unique_string[byte+1] = 0 ;
}
}
//== Call handler ==
if (handler)
handler(tsreader, tsstate, (struct Section *)&cit, tsreader->user_data) ;
//== Tidy up ==
list_for_each_safe(item,safe,&cit.cit_array) {
struct CIT_entry *cit_entry = list_entry(item, struct CIT_entry, next);
free(cit_entry) ;
}
}