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/*
* Copyright (c) 2013-2014 - 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/mgt.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t atsc_table_mgt_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct atsc_table_mgt **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct atsc_table_mgt *mgt;
struct atsc_table_mgt_table **head;
struct dvb_desc **head_desc;
size_t size;
int i = 0;
size = offsetof(struct atsc_table_mgt, table);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != ATSC_TABLE_MGT) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x",
__func__, buf[0], ATSC_TABLE_MGT);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct atsc_table_mgt), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
mgt = *table;
memcpy(mgt, p, size);
p += size;
dvb_table_header_init(&mgt->header);
bswap16(mgt->tables);
/* find end of curent lists */
head_desc = &mgt->descriptor;
while (*head_desc != NULL)
head_desc = &(*head_desc)->next;
head = &mgt->table;
while (*head != NULL)
head = &(*head)->next;
while (i++ < mgt->tables && p < endbuf) {
struct atsc_table_mgt_table *table;
size = offsetof(struct atsc_table_mgt_table, descriptor);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -4;
}
table = (struct atsc_table_mgt_table *) malloc(sizeof(struct atsc_table_mgt_table));
if (!table) {
dvb_logerr("%s: out of memory", __func__);
return -5;
}
memcpy(table, p, size);
p += size;
bswap16(table->type);
bswap16(table->bitfield);
bswap16(table->bitfield2);
bswap32(table->size);
table->descriptor = NULL;
table->next = NULL;
*head = table;
head = &(*head)->next;
/* parse the descriptors */
size = table->desc_length;
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -6;
}
if (dvb_desc_parse(parms, p, size,
&table->descriptor) != 0) {
return -7;
}
p += size;
}
/* TODO: parse MGT descriptors here into head_desc */
return p - buf;
}
void atsc_table_mgt_free(struct atsc_table_mgt *mgt)
{
struct atsc_table_mgt_table *table = mgt->table;
dvb_desc_free(&mgt->descriptor);
while (table) {
struct atsc_table_mgt_table *tmp = table;
dvb_desc_free((struct dvb_desc **) &table->descriptor);
table = table->next;
free(tmp);
}
free(mgt);
}
void atsc_table_mgt_print(struct dvb_v5_fe_parms *parms, struct atsc_table_mgt *mgt)
{
const struct atsc_table_mgt_table *table = mgt->table;
uint16_t tables = 0;
dvb_loginfo("MGT");
ATSC_TABLE_HEADER_PRINT(parms, mgt);
dvb_loginfo("| tables %d", mgt->tables);
while (table) {
dvb_loginfo("|- type %04x %d", table->type, table->pid);
dvb_loginfo("| one %d", table->one);
dvb_loginfo("| one2 %d", table->one2);
dvb_loginfo("| type version %d", table->type_version);
dvb_loginfo("| size %d", table->size);
dvb_loginfo("| one3 %d", table->one3);
dvb_loginfo("| desc_length %d", table->desc_length);
dvb_desc_print(parms, table->descriptor);
table = table->next;
tables++;
}
dvb_loginfo("|_ %d tables", tables);
}
|
