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/*
* Copyright (c) 2011-2012 - Mauro Carvalho Chehab
* 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/pat.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_pat_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct dvb_table_pat **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct dvb_table_pat *pat;
struct dvb_table_pat_program **head;
size_t size;
size = offsetof(struct dvb_table_pat, programs);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != DVB_TABLE_PAT) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x",
__func__, buf[0], DVB_TABLE_PAT);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct dvb_table_pat), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
pat = *table;
memcpy(pat, buf, size);
p += size;
dvb_table_header_init(&pat->header);
/* find end of current list */
head = &pat->program;
while (*head != NULL)
head = &(*head)->next;
size = pat->header.section_length + 3 - DVB_CRC_SIZE; /* plus header, minus CRC */
if (buf + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - buf, size);
return -4;
}
endbuf = buf + size;
size = offsetof(struct dvb_table_pat_program, next);
while (p + size <= endbuf) {
struct dvb_table_pat_program *prog;
prog = malloc(sizeof(struct dvb_table_pat_program));
if (!prog) {
dvb_logerr("%s: out of memory", __func__);
return -5;
}
memcpy(prog, p, size);
p += size;
bswap16(prog->service_id);
if (prog->pid == 0x1fff) { /* ignore null packets */
free(prog);
break;
}
bswap16(prog->bitfield);
pat->programs++;
prog->next = NULL;
*head = prog;
head = &(*head)->next;
}
if (endbuf - p)
dvb_logwarn("%s: %zu spurious bytes at the end",
__func__, endbuf - p);
return p - buf;
}
void dvb_table_pat_free(struct dvb_table_pat *pat)
{
struct dvb_table_pat_program *prog = pat->program;
while (prog) {
struct dvb_table_pat_program *tmp = prog;
prog = prog->next;
free(tmp);
}
free(pat);
}
void dvb_table_pat_print(struct dvb_v5_fe_parms *parms, struct dvb_table_pat *pat)
{
struct dvb_table_pat_program *prog = pat->program;
dvb_loginfo("PAT");
dvb_table_header_print(parms, &pat->header);
dvb_loginfo("|\\ %d program pid%s", pat->programs, pat->programs != 1 ? "s" : "");
while (prog) {
dvb_loginfo("| pid 0x%04x: service 0x%04x", prog->pid, prog->service_id);
prog = prog->next;
}
}
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