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teletext.c
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teletext.c
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/* hacktv - Analogue video transmitter for the HackRF */
/*=======================================================================*/
/* Copyright 2018 Philip Heron <[email protected]> */
/* */
/* 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 3 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, see <http://www.gnu.org/licenses/>. */
/* -=== Teletext encoder ===-
*
* Encodes a teletext stream, inserting packets into the VBI area of the
* video signal. Teletext pages in the TTI file format are supported.
*
* This version only works with 625-line PAL modes. There are NTSC and
* SECAM variations of Teletext but those are not currently supported.
*
* TODO: The clock on the header line will not be accurate when not
* transmitting live. This could be fixed by calculating the time based
* on the timecode, but it will need some flag to indicate if the output
* is live or not.
*
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <time.h>
#include <ctype.h>
#include <dirent.h>
#include <limits.h>
#include <sys/stat.h>
#include "video.h"
#include "vbidata.h"
static const uint8_t _parity[0x80] = {
0x80, 0x01, 0x02, 0x83, 0x04, 0x85, 0x86, 0x07,
0x08, 0x89, 0x8A, 0x0B, 0x8C, 0x0D, 0x0E, 0x8F,
0x10, 0x91, 0x92, 0x13, 0x94, 0x15, 0x16, 0x97,
0x98, 0x19, 0x1A, 0x9B, 0x1C, 0x9D, 0x9E, 0x1F,
0x20, 0xA1, 0xA2, 0x23, 0xA4, 0x25, 0x26, 0xA7,
0xA8, 0x29, 0x2A, 0xAB, 0x2C, 0xAD, 0xAE, 0x2F,
0xB0, 0x31, 0x32, 0xB3, 0x34, 0xB5, 0xB6, 0x37,
0x38, 0xB9, 0xBA, 0x3B, 0xBC, 0x3D, 0x3E, 0xBF,
0x40, 0xC1, 0xC2, 0x43, 0xC4, 0x45, 0x46, 0xC7,
0xC8, 0x49, 0x4A, 0xCB, 0x4C, 0xCD, 0xCE, 0x4F,
0xD0, 0x51, 0x52, 0xD3, 0x54, 0xD5, 0xD6, 0x57,
0x58, 0xD9, 0xDA, 0x5B, 0xDC, 0x5D, 0x5E, 0xDF,
0xE0, 0x61, 0x62, 0xE3, 0x64, 0xE5, 0xE6, 0x67,
0x68, 0xE9, 0xEA, 0x6B, 0xEC, 0x6D, 0x6E, 0xEF,
0x70, 0xF1, 0xF2, 0x73, 0xF4, 0x75, 0x76, 0xF7,
0xF8, 0x79, 0x7A, 0xFB, 0x7C, 0xFD, 0xFE, 0x7F
};
static const uint8_t _hamming84[0x10] = {
0x15, 0x02, 0x49, 0x5E, 0x64, 0x73, 0x38, 0x2F,
0xD0, 0xC7, 0x8C, 0x9B, 0xA1, 0xB6, 0xFD, 0xEA,
};
static uint8_t _unhamming84(uint8_t b)
{
int i;
/* This won't handle bit errors, it's only for internal use */
for(i = 0; i < 16; i++)
{
if(_hamming84[i] == b)
{
return(i);
}
}
return(0);
}
static uint16_t _crc(uint16_t crc, const uint8_t *data, size_t length)
{
uint16_t i, bit;
uint8_t b;
while(length--)
{
b = *(data++);
/* As per ETS 300 706 9.6.1 */
for(i = 0; i < 8; i++, b <<= 1)
{
bit = ((crc >> 15) ^ (crc >> 11) ^ (crc >> 8) ^ (crc >> 6) ^ (b >> 7)) & 1;
crc = (crc << 1) | bit;
}
}
return(crc);
}
static int _line_packet_number(const uint8_t line[45])
{
return(
(_unhamming84(line[4]) << 1) |
(_unhamming84(line[3]) >> 3)
);
}
/*static void _dump_line(uint8_t line[45])
{
int magazine;
int packet_number;
int i;
char c;
magazine = _unhamming84(line[3]) & 7;
if(magazine == 0) magazine = 8;
packet_number = _line_packet_number(line);
printf("%d/%d '", magazine, packet_number);
for(i = 0; i < (packet_number == 0 ? 32 : 40); i++)
{
c = line[(packet_number == 0 ? 13 : 5) + i] & 0x7F;
printf("%c", isprint(c) ? c : '_');
}
printf("'\n");
}*/
static void *_paritycpy(void *dest, const void *src, size_t n, uint8_t pad)
{
uint8_t *d = dest;
const uint8_t *s = src;
/* Copy the bytes, applying parity bits */
for(; n && *s; n--)
{
*(d++) = _parity[*(s++) & 0x7F];
}
/* Fill the remainder of the line with spaces */
while(n--)
{
*(d++) = _parity[pad & 0x7F];
}
return(dest);
}
static int _mjd(int year, int month, int day)
{
double mjd;
/* Calculate Modified Julian Date */
mjd = 367.0 * year - (int) (7.0 * (year + (int) ((month + 9.0) / 12.0)) / 4.0)
+ (int) (275.0 * month / 9.0) + day - 678987.0;
return((int) mjd);
}
#ifdef __MINGW32__
static struct tm *gmtime_r(const time_t *timep, struct tm *result)
{
struct tm *tm = gmtime(timep);
if(!tm)
{
return(NULL);
}
memcpy(result, tm, sizeof(struct tm));
return(result);
}
#endif
static void _packet830(uint8_t line[45], time_t timestamp)
{
int magazine = 8;
int packet_number = 30;
int initial_page = 0x100;
int initial_subcode = 0x3F7F;
struct tm tm;
int mjd;
/* Synchronization sequence (Clock run-in and framing code) */
line[0] = 0x55;
line[1] = 0x55;
line[2] = 0x27;
/* Packet address */
line[3] = _hamming84[((packet_number & 1) << 3) | (magazine & 7)];
line[4] = _hamming84[(packet_number >> 1) & 15];
/* Designation code */
line[5] = _hamming84[0]; /* 0 = Multiplexed, 1 = Non-multiplexed */
/* Initial Page */
line[6] = _hamming84[initial_page & 0x0F];
line[7] = _hamming84[(initial_page >> 4) & 0x0F];
line[8] = _hamming84[initial_subcode & 0x0F];
line[9] = _hamming84[
(((initial_page >> 8) & 0x01) << 3) |
((initial_subcode >> 4) & 0x07)
];
line[10] = _hamming84[(initial_subcode >> 8) & 0x0F];
line[11] = _hamming84[
(((initial_page >> 9) & 0x03) << 2) |
((initial_subcode >> 12) & 0x03)
];
/* Network Identification Code */
/* This is not supported yet. Note: Bits are reversed */
line[12] = 0x00;
line[13] = 0x00;
/* Time Offset Code (TODO) */
line[14] = 0;
/* Modified Julian Date */
gmtime_r(×tamp, &tm);
mjd = _mjd(1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday);
line[15] = mjd % 100000 / 10000 + 1;
line[16] = (mjd % 10000 / 1000 + 1) << 4
| (mjd % 1000 / 100 + 1);
line[17] = (mjd % 100 / 10 + 1) << 4
| (mjd % 10 + 1);
/* UTC time */
line[18] = ((tm.tm_hour / 10) + 1) << 4
| ((tm.tm_hour % 10) + 1);
line[19] = ((tm.tm_min / 10) + 1) << 4
| ((tm.tm_min % 10) + 1);
line[20] = ((tm.tm_sec / 10) + 1) << 4
| ((tm.tm_sec % 10) + 1);
/* Reserved */
line[21] = 0x00;
line[22] = 0x00;
line[23] = 0x00;
line[24] = 0x00;
/* Status Display */
_paritycpy(&line[25], "hacktv", 20, ' ');
}
static void _header(uint8_t line[45], int magazine, int page, int subcode, int status, char *data)
{
int packet_number = 0;
int erase_page;
int subtitle;
int newsflash;
int inhibit_display;
int interrupted_sequence;
int update_indicator;
int suppress_header;
int national_option_character_subset;
int magazine_serial;
erase_page = (status >> 14) & 1;
newsflash = (status >> 0) & 1;
subtitle = (status >> 1) & 1;
suppress_header = (status >> 2) & 1;
update_indicator = (status >> 3) & 1;
interrupted_sequence = (status >> 4) & 1;
inhibit_display = (status >> 5) & 1;
magazine_serial = 0; // (status >> 6) & 1; /* We only use parallel */
national_option_character_subset = (status >> 7) & 7;
/* Synchronization sequence (Clock run-in and framing code) */
line[0] = 0x55;
line[1] = 0x55;
line[2] = 0x27;
/* Packet address */
line[3] = _hamming84[((packet_number & 1) << 3) | (magazine & 7)];
line[4] = _hamming84[(packet_number >> 1) & 15];
/* Page packet header (Y = 0) */
line[5] = _hamming84[page & 0x0F];
line[6] = _hamming84[(page >> 4) & 0x0F];
line[7] = _hamming84[subcode & 0x0F];
line[8] = _hamming84[
(erase_page ? 1 << 3 : 0) |
((subcode >> 4) & 0x07)
];
line[9] = _hamming84[(subcode >> 8) & 0x0F];
line[10] = _hamming84[
(subtitle ? 1 << 3 : 0) |
(newsflash ? 1 << 2 : 0) |
((subcode >> 12) & 0x03)
];
line[11] = _hamming84[
(inhibit_display ? 1 << 3 : 0) |
(interrupted_sequence ? 1 << 2 : 0) |
(update_indicator ? 1 << 1 : 0) |
(suppress_header ? 1 << 0 : 0)
];
line[12] = _hamming84[
(national_option_character_subset << 1) |
(magazine_serial ? 1 << 0 : 0)
];
/* Copy the data, applying parity bits */
_paritycpy(&line[13], data, 32, ' ');
}
static void _fastext_line(uint8_t line[45], int magazine, int links[6])
{
int packet_number = 27;
int page;
int subcode;
uint8_t *link;
int i;
/* Synchronization sequence (Clock run-in and framing code) */
line[0] = 0x55;
line[1] = 0x55;
line[2] = 0x27;
/* Packet address */
line[3] = _hamming84[((packet_number & 1) << 3) | (magazine & 7)];
line[4] = _hamming84[(packet_number >> 1) & 15];
/* Designation code, always 0 */
line[5] = _hamming84[0];
for(i = 0; i < 6; i++)
{
link = &line[6 + (6 * i)];
if(links[i] < 0x100)
{
page = 0x8FF;
subcode = 0x3F7F;
}
else if(links[i] < 0x10000)
{
page = links[i];
subcode = 0x3F7F;
}
else
{
page = links[i] >> 8;
subcode = links[i] & 0xFF;
}
/* The magazine number is xor'ed with the page number */
page ^= (magazine & 7) << 8;
link[0] = _hamming84[page & 0x0F];
link[1] = _hamming84[(page >> 4) & 0x0F];
link[2] = _hamming84[subcode & 0x0F];
link[3] = _hamming84[
(((page >> 8) & 0x01) << 3) |
((subcode >> 4) & 0x07)
];
link[4] = _hamming84[(subcode >> 8) & 0x0F];
link[5] = _hamming84[
(((page >> 9) & 0x03) << 2) |
((subcode >> 12) & 0x03)
];
}
/* Link Control Byte, always 0x0F */
line[42] = _hamming84[0x0F];
/* Page CRC padding. Real CRC is generated later. */
line[43] = 0x12;
line[44] = 0x34;
}
static void _line(uint8_t line[45], int magazine, int packet_number, const uint8_t *data)
{
/* Synchronization sequence (Clock run-in and framing code) */
line[0] = 0x55;
line[1] = 0x55;
line[2] = 0x27;
/* Packet address */
line[3] = _hamming84[((packet_number & 1) << 3) | (magazine & 7)];
line[4] = _hamming84[(packet_number >> 1) & 15];
/* Copy the data, applying parity bits */
_paritycpy(&line[5], data, 40, ' ');
}
/*static void _dump_service_map(tt_service_t *s)
{
tt_magazine_t *mag;
tt_page_t *page;
tt_page_t *subpage;
int i;
for(i = 1; i <= 8; i++)
{
printf("Magazine %d:\n", i);
mag = &s->magazines[i & 7];
page = mag->pages;
while(page)
{
printf("+ Page %03X/%d\n", page->page, page->subpage);
for(subpage = page->next_subpage; subpage != page; subpage = subpage->next_subpage)
{
printf("+++ Subpage %03X/%X", subpage->page, subpage->subpage);
if(subpage->subpages != page->subpages)
{
printf(" ! subpage->subpages != page->subpages");
}
printf("\n");
}
page = page->next;
if(page == mag->pages) break;
}
}
}*/
static char *_mk_header(char *s, uint16_t page, time_t timestamp)
{
char temp[33];
struct tm *tm;
/* TODO: Make this customisable */
tm = localtime(×tamp);
snprintf(temp, 33, "hacktv %03X %%a %%d %%b\x03" "%%H:%%M/%%S", page);
strftime(s, 33, temp, tm);
return(s);
}
static void _update_page_crc(tt_page_t *page, const uint8_t header[45])
{
const uint8_t *blank = (const uint8_t *) " ";
uint8_t *line;
uint16_t crc;
int l, i;
/* Begin calculating the CRC from the header */
crc = _crc(0x0000, &header[13], 24);
/* Scan each line in order, using the blank line if not found */
for(l = 1; l < 26; l++)
{
line = NULL;
/* Try to find this line */
for(i = 0; i < page->packets; i++)
{
if(_line_packet_number(&page->data[i * 45]) == l)
{
line = &page->data[i * 45 + 5];
break;
}
}
crc = _crc(crc, line != NULL ? line : blank, 40);
}
/* Scan for packet 27 and update CRC */
for(line = page->data, i = 0; i < page->packets; line += 45, i++)
{
if(_line_packet_number(line) == 27)
{
line[43] = (crc >> 8) & 0xFF;
line[44] = (crc >> 0) & 0xFF;
}
}
}
static int _next_magazine_packet(tt_service_t *s, tt_magazine_t *mag, uint8_t line[45], unsigned int timecode)
{
char header[33];
if(mag->filler)
{
/* Generate the filler header packet */
_mk_header(header, 0x8FF, s->timestamp);
_header(line, mag->magazine & 0x07, 0xFF, 0x3F7F, 0x8000, header);
mag->filler = 0;
return(TT_OK);
}
if(mag->pages == NULL)
{
return(TT_NO_PACKET);
}
if(mag->row == 0)
{
int status = mag->page->page_status;
/* Set the erase flag if needed */
status &= ~(1 << 14);
status |= mag->page->erase << 14;
mag->page->erase = 0;
_mk_header(header, mag->page->page, s->timestamp);
_header(line, mag->magazine & 0x07, mag->page->page & 0xFF, mag->page->subcode, status, header);
/* Update the page CRC */
_update_page_crc(mag->page, line);
/* Set the delay time (20ms rule) */
mag->delay = timecode + s->header_delay;
mag->row++;
}
else
{
/* Return nothing if the next row is a display row,
* and we're still within the delay period */
if(mag->row - 1 == mag->page->nodelay_packets && timecode < mag->delay)
{
return(TT_NO_PACKET);
}
/* Copy the packet */
memcpy(line, &mag->page->data[(mag->row - 1) * 45], 45);
mag->row++;
}
/* Test if this is the last row on this page */
if(mag->row - 1 == mag->page->packets)
{
tt_page_t *npage = mag->page->next;
/* Test if we need to advance the next page's subpage */
if(npage->cycle_time && npage != npage->next_subpage)
{
int adv = 0;
if(npage->cycle_mode == 0)
{
/* Timer mode */
if(timecode >= npage->cycle_count)
{
npage->cycle_count = timecode + npage->cycle_time * s->second_delay;
adv = 1;
}
}
else
{
/* Cycle mode */
npage->cycle_count++;
if(npage->cycle_count == npage->cycle_time)
{
npage->cycle_count = 0;
adv = 1;
}
}
if(adv)
{
mag->page->next = npage->next_subpage;
npage->next_subpage->next = npage->next;
npage->next_subpage->cycle_count = npage->cycle_count;
npage->next_subpage->erase = 1;
}
}
/* Advance magazine to the next page */
mag->page = mag->page->next;
mag->row = 0;
/* Special case for magazines with only one page,
* set the filler flag to correctly end the page */
/* TODO: Am I correct here? Is this needed? What about subpages? */
if(mag->pages->next == mag->pages)
{
mag->filler = 1;
}
}
return(TT_OK);
}
static int _next_packet(tt_service_t *s, uint8_t line[45], unsigned int timecode)
{
int i, r;
time_t timestamp;
/* Update the timestamp */
timestamp = time(NULL);
/* If the timestamp has changed, we need to insert an 8/30 packet */
if(s->timestamp != timestamp)
{
s->timestamp = timestamp;
_packet830(line, timestamp);
return(TT_OK);
}
/* Test each magazine for the next available packet */
for(i = 0; i < 8; i++)
{
r = _next_magazine_packet(s, &s->magazines[s->magazine++], line, timecode);
s->magazine &= 7;
if(r == TT_OK)
{
return(TT_OK);
}
}
/* No magazine returned a packet, return nothing */
return(TT_NO_PACKET);
}
static int _line_len(uint8_t line[40])
{
int x;
for(x = 0; x < 40; x++)
{
if(line[x] != ' ' && line[x] != '\0') break;
}
return(40 - x);
}
static int _page_mkpackets(tt_page_t *page, uint8_t lines[25][40])
{
int i, j;
/* Count the number of non-empty packets (+ 1 for fastext packet) */
page->packets = 1;
page->nodelay_packets = 0;
for(i = 1; i < 25; i++)
{
if(_line_len(lines[i]) > 0)
{
page->packets++;
}
}
/* (Re)allocate memory for the packets */
page->data = realloc(page->data, page->packets * 45);
/* The fastext packet is transmitted before the page content (Annex B.2) */
_fastext_line(&page->data[0], (page->page >> 8) & 0x07, page->links);
/* Generate the line packets */
for(j = 1, i = 1; i < 25; i++)
{
if(_line_len(lines[i]) > 0)
{
_line(&page->data[j++ * 45], (page->page >> 8) & 0x07, i, lines[i]);
}
}
return(TT_OK);
}
static void _add_page(tt_service_t *s, tt_page_t *new_page)
{
tt_magazine_t *mag;
tt_page_t *page;
tt_page_t *subpage;
/* Make sure erase flag is set for the new page */
new_page->erase = 1;
mag = &s->magazines[(new_page->page >> 8) & 0x07];
if(mag->pages == NULL)
{
/* This is the first page added to the magazine */
mag->pages = new_page;
mag->page = new_page;
new_page->next = new_page;
new_page->subpages = new_page;
new_page->next_subpage = new_page;
return;
}
/* Scan the magazine for the page insertion point */
for(page = mag->pages; page->next != mag->pages; page = page->next)
{
if(page->page <= new_page->page &&
page->next->page > new_page->page) break;
}
if(page->page != new_page->page)
{
/* This is a new page, to be appended */
new_page->next = page->next;
new_page->subpages = new_page;
new_page->next_subpage = new_page;
page->next = new_page;
if(new_page->page < mag->pages->page)
{
mag->pages = new_page;
}
}
else
{
/* This is an existing page */
new_page->next = page->next;
/* Scan for the sub-page insertion point */
for(subpage = page->subpages; subpage->next_subpage != page->subpages; subpage = subpage->next_subpage)
{
if(subpage->subpage <= new_page->subpage &&
subpage->next_subpage->subpage > new_page->subpage) break;
}
if(subpage->subpage != new_page->subpage)
{
/* This is a new subpage, to be appended */
new_page->next_subpage = subpage->next_subpage;
subpage->next_subpage = new_page;
if(new_page->subpage < page->subpages->subpage)
{
page->subpages = new_page;
}
new_page->subpages = page->subpages;
}
else
{
/* This is an existing subpage, replace it */
/* Copy the subpage pointers */
new_page->next_subpage = subpage->next_subpage;
new_page->subpages = subpage->subpages;
/* Free the old page packet data */
free(subpage->data);
/* Overwrite the old page data with the new one */
memcpy(subpage, new_page, sizeof(tt_page_t));
/* And finally free the new page data */
free(new_page);
}
}
}
static int _load_tti(tt_service_t *s, char *filename)
{
char buf[200];
size_t i, len;
int c;
FILE *f;
unsigned int x;
char *t;
uint8_t lines[25][40];
tt_page_t *page;
int esc;
f = fopen(filename, "rb");
if(!f)
{
perror("fopen");
return(TT_ERROR);
}
page = calloc(sizeof(tt_page_t), 1);
if(!page)
{
perror("calloc");
fclose(f);
return(TT_OUT_OF_MEMORY);
}
len = 0;
/* Test if this is a TTI file */
len += fread(buf, sizeof(char), 3, f);
/* Expect the file to begin with a two letter code followed by a comma */
if(len != 3 ||
buf[0] < 'A' || buf[0] > 'Z' ||
buf[1] < 'A' || buf[1] > 'Z' ||
buf[2] != ',')
{
fprintf(stderr, "%s: Unrecognised file format. Skipping...\n", filename);
free(page);
fclose(f);
return(TT_ERROR);
}
while(!feof(f))
{
/* Top-up input buffer */
len += fread(buf + len, sizeof(char), 200 - len, f);
while(len > 0)
{
/* Search for a newline */
for(i = 0; i < len; i++)
{
if(buf[i] == '\r' || buf[i] == '\n' || buf[i] == '\0')
{
buf[i] = '\0';
break;
}
}
if(i == len)
{
/* No newline found */
break;
}
if(buf[0] == '\0')
{
/* Blank line */
}
else if(strncmp("PN,", buf, 3) == 0)
{
/* PN - Page Number */
/* PN,mppss (m = magazine, pp = page, ss = subpage) */
if(page->page > 0)
{
tt_page_t *opage = page;
/* Save current page */
_page_mkpackets(page, lines);
_add_page(s, page);
/* Lazily copy the old page settings */
page = malloc(sizeof(tt_page_t));
if(!page)
{
perror("malloc");
fclose(f);
return(TT_OUT_OF_MEMORY);
}
memcpy(page, opage, sizeof(tt_page_t));
/* Have to unset the packet pointer */
page->data = NULL;
}
/* Clear existing page data */
for(c = 0; c < 25; c++)
{
memset(lines[c], ' ', 40);
}
x = strtol(buf + 3, NULL, 16);
if(x < 0x10000)
{
page->page = x;
page->subpage = 0;
}
else
{
page->page = x >> 8;
page->subpage = x & 0xFF;
}
}
else if(strncmp("CT,", buf, 3) == 0)
{
/* CT - Cycle Time */
/* CT,n,<t> (n = delay, t = C/T (Cycle/Timed) */
page->cycle_time = strtol(buf + 3, &t, 10);
page->cycle_mode = 0;
if(t[0] == ',' && (t[1] == 'C' || t[1] == 'c'))
{
page->cycle_mode = 1;
}
}
else if(strncmp("DE,", buf, 3) == 0)
{
/* DE - Description */
/* DE,<text> */
}
else if(strncmp("PS,", buf, 3) == 0)
{
/* PS - Page Status */
/* PS,ssss */
x = strtol(buf + 3, NULL, 16);
page->page_status = x;
}
else if(strncmp("SC,", buf, 3) == 0)
{
/* SC - Subcode */
/* SC,ssss */
x = strtol(buf + 3, NULL, 16);
page->subcode = x;
}
else if(strncmp("OL,", buf, 3) == 0)
{
/* OL - Output Line */
/* OL,nn,<line> */
x = strtol(buf + 3, &t, 10);
if(x > 0 && x < 25)
{
if(*t == ',')
{
t++;
}
for(esc = 0, c = 0; *t && c < 40; t++)
{
if(*t == 0x1B)
{
esc = 1;
continue;
}
lines[x][c++] = (esc ? *t - 0x40 : *t) & 0x7F;
esc = 0;
}
}
}
else if(strncmp("FL,", buf, 3) == 0)
{
/* FL - Fastext Link */
/* FL,rrr,ggg,yyy,ccc,lll,iii */
t = buf + 2;
for(c = 0; *t == ',' && c < 6; c++)
{
page->links[c] = strtol(t + 1, &t, 16);
}
}
else if(buf[2] != ',')
{
fprintf(stderr, "%s: Unrecognised line: '%s'\n", filename, buf);
}
len -= i + 1;
memmove(buf, buf + i + 1, len);
}
if(len == 200)
{
fprintf(stderr, "%s: Line too long (>200 characters)\n", filename);
len = 0;
}
}
fclose(f);
if(page->page > 0)
{
_page_mkpackets(page, lines);
_add_page(s, page);
}
return(TT_OK);
}
static int _new_service(tt_service_t *s)
{
int i;
tt_magazine_t *mag;
/* Create an empty service */
s->timestamp = 0;
s->second_delay = 25 * 625;
s->header_delay = (20e-3 * s->second_delay) + 0.5;