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/*
* Copyright (c) 2012-2014 - Andre Roth <neolynx@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation version 2.1 of the License.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
*/
#include <libdvbv5/eit.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t dvb_table_eit_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct dvb_table_eit **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct dvb_table_eit *eit;
struct dvb_table_eit_event **head;
size_t size;
size = offsetof(struct dvb_table_eit, event);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if ((buf[0] != DVB_TABLE_EIT && buf[0] != DVB_TABLE_EIT_OTHER) &&
!(buf[0] >= DVB_TABLE_EIT_SCHEDULE && buf[0] <= DVB_TABLE_EIT_SCHEDULE + 0xF) &&
!(buf[0] >= DVB_TABLE_EIT_SCHEDULE_OTHER && buf[0] <= DVB_TABLE_EIT_SCHEDULE_OTHER + 0xF)) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x, 0x%02x or between 0x%02x and 0x%02x or 0x%02x and 0x%02x",
__func__, buf[0], DVB_TABLE_EIT, DVB_TABLE_EIT_OTHER,
DVB_TABLE_EIT_SCHEDULE, DVB_TABLE_EIT_SCHEDULE + 0xF,
DVB_TABLE_EIT_SCHEDULE_OTHER, DVB_TABLE_EIT_SCHEDULE_OTHER + 0xF);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct dvb_table_eit), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
eit = *table;
memcpy(eit, p, size);
p += size;
dvb_table_header_init(&eit->header);
bswap16(eit->transport_id);
bswap16(eit->network_id);
/* find end of curent list */
head = &eit->event;
while (*head != NULL)
head = &(*head)->next;
/* get the event entries */
size = offsetof(struct dvb_table_eit_event, descriptor);
while (p + size <= endbuf) {
struct dvb_table_eit_event *event;
event = malloc(sizeof(struct dvb_table_eit_event));
if (!event) {
dvb_logerr("%s: out of memory", __func__);
return -4;
}
memcpy(event, p, size);
p += size;
bswap16(event->event_id);
bswap16(event->bitfield1);
bswap16(event->bitfield2);
event->descriptor = NULL;
event->next = NULL;
dvb_time(event->dvbstart, &event->start);
event->duration = dvb_bcd((uint32_t) event->dvbduration[0]) * 3600 +
dvb_bcd((uint32_t) event->dvbduration[1]) * 60 +
dvb_bcd((uint32_t) event->dvbduration[2]);
event->service_id = eit->header.id;
*head = event;
head = &(*head)->next;
/* parse the descriptors */
if (event->desc_length > 0) {
uint16_t desc_length = event->desc_length;
if (p + desc_length > endbuf) {
dvb_logwarn("%s: descriptors short read %zd/%d bytes", __func__,
endbuf - p, desc_length);
desc_length = endbuf - p;
}
if (dvb_desc_parse(parms, p, desc_length,
&event->descriptor) != 0) {
return -5;
}
p += desc_length;
}
}
if (p < endbuf)
dvb_logwarn("%s: %zu spurious bytes at the end",
__func__, endbuf - p);
return p - buf;
}
void dvb_table_eit_free(struct dvb_table_eit *eit)
{
struct dvb_table_eit_event *event = eit->event;
while (event) {
dvb_desc_free((struct dvb_desc **) &event->descriptor);
struct dvb_table_eit_event *tmp = event;
event = event->next;
free(tmp);
}
free(eit);
}
void dvb_table_eit_print(struct dvb_v5_fe_parms *parms, struct dvb_table_eit *eit)
{
dvb_loginfo("EIT");
dvb_table_header_print(parms, &eit->header);
dvb_loginfo("|- transport_id %d", eit->transport_id);
dvb_loginfo("|- network_id %d", eit->network_id);
dvb_loginfo("|- last segment %d", eit->last_segment);
dvb_loginfo("|- last table %d", eit->last_table_id);
dvb_loginfo("|\\ event_id");
const struct dvb_table_eit_event *event = eit->event;
uint16_t events = 0;
while (event) {
char start[255];
strftime(start, sizeof(start), "%F %T", &event->start);
dvb_loginfo("|- %7d", event->event_id);
dvb_loginfo("| Service %d", event->service_id);
dvb_loginfo("| Start %s UTC", start);
dvb_loginfo("| Duration %dh %dm %ds", event->duration / 3600, (event->duration % 3600) / 60, event->duration % 60);
dvb_loginfo("| free CA mode %d", event->free_CA_mode);
dvb_loginfo("| running status %d: %s", event->running_status, dvb_eit_running_status_name[event->running_status] );
dvb_desc_print(parms, event->descriptor);
event = event->next;
events++;
}
dvb_loginfo("|_ %d events", events);
}
void dvb_time(const uint8_t data[5], struct tm *tm)
{
/* ETSI EN 300 468 V1.4.1 */
int year, month, day, hour, min, sec;
int k = 0;
uint16_t mjd;
mjd = *(uint16_t *) data;
hour = dvb_bcd(data[2]);
min = dvb_bcd(data[3]);
sec = dvb_bcd(data[4]);
year = ((mjd - 15078.2) / 365.25);
month = ((mjd - 14956.1 - (int) (year * 365.25)) / 30.6001);
day = mjd - 14956 - (int) (year * 365.25) - (int) (month * 30.6001);
if (month == 14 || month == 15) k = 1;
year += k;
month = month - 1 - k * 12;
tm->tm_sec = sec;
tm->tm_min = min;
tm->tm_hour = hour;
tm->tm_mday = day;
tm->tm_mon = month - 1;
tm->tm_year = year;
tm->tm_isdst = -1; /* do not adjust */
mktime( tm );
}
const char *dvb_eit_running_status_name[8] = {
[0] = "Undefined",
[1] = "Not running",
[2] = "Starts in a few seconds",
[3] = "Pausing",
[4] = "Running",
[5 ... 7] = "Reserved"
};
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