/*
* parse_desc_teletext.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_desc_teletext.h"
#include "descriptors/parse_desc.h"
/*=============================================================================================*/
// CONSTANTS
/*=============================================================================================*/
/*=============================================================================================*/
// MACROS
/*=============================================================================================*/
/*=============================================================================================*/
// FUNCTIONS
/*=============================================================================================*/
/* ----------------------------------------------------------------------- */
//
// teletext_descriptor(){
// descriptor_tag 8 uimsbf
// descriptor_length 8 uimsbf
// for (i=0;i<N;i++){
// ISO_639_language_code 24 bslbf
// teletext_type 5 uimsbf
// teletext_magazine_number 3 uimsbf
// teletext_page_number 8 uimsbf
// }
// }
/* ----------------------------------------------------------------------- */
void print_teletext(struct Descriptor_teletext *td, int level)
{
struct list_head *item, *safe;
printf(" Descriptor: teletext [0x%02x]\n", td->descriptor_tag) ;
printf(" Length: %d\n", td->descriptor_length) ;
list_for_each_safe(item,safe,&td->td_array) {
struct TD_entry *td_entry = list_entry(item, struct TD_entry, next);
// TD entry
printf(" -TD entry-\n") ;
printf(" ISO_639_language_code = %d\n", td_entry->ISO_639_language_code) ;
printf(" teletext_type = %d\n", td_entry->teletext_type) ;
printf(" teletext_magazine_number = %d\n", td_entry->teletext_magazine_number) ;
printf(" teletext_page_number = %d\n", td_entry->teletext_page_number) ;
}
}
/* ----------------------------------------------------------------------- */
struct Descriptor *parse_teletext(struct TS_bits *bits, unsigned tag, unsigned len)
{
struct Descriptor_teletext *td ;
unsigned byte ;
int end_buff_len ;
td = (struct Descriptor_teletext *)malloc( sizeof(*td) ) ;
memset(td,0,sizeof(*td));
//== Parse data ==
INIT_LIST_HEAD(&td->next);
td->descriptor_tag = tag ; // already extracted by parse_desc()
td->descriptor_length = len ; // already extracted by parse_desc()
INIT_LIST_HEAD(&td->td_array) ;
end_buff_len = bits_len_calc(bits, -td->descriptor_length ) ;
while (bits->buff_len > end_buff_len)
{
struct TD_entry *td_entry = malloc(sizeof(*td_entry));
memset(td_entry,0,sizeof(*td_entry));
list_add_tail(&td_entry->next,&td->td_array);
td_entry->ISO_639_language_code = bits_get(bits, 24) ;
td_entry->teletext_type = bits_get(bits, 5) ;
td_entry->teletext_magazine_number = bits_get(bits, 3) ;
td_entry->teletext_page_number = bits_get(bits, 8) ;
}
return (struct Descriptor *)td ;
}
/* ----------------------------------------------------------------------- */
void free_teletext(struct Descriptor_teletext *td)
{
struct list_head *item, *safe;
list_for_each_safe(item,safe,&td->td_array) {
struct TD_entry *td_entry = list_entry(item, struct TD_entry, next);
free(td_entry) ;
}
free(td) ;
}