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/*
* Copyright (c) 2013 - Mauro Carvalho Chehab <mchehab@kernel.org>
* 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/vct.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#include <parse_string.h>
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t atsc_table_vct_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct atsc_table_vct **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct atsc_table_vct *vct;
struct atsc_table_vct_channel **head;
size_t size;
int i, n;
size = offsetof(struct atsc_table_vct, channel);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != ATSC_TABLE_TVCT && buf[0] != ATSC_TABLE_CVCT) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x or 0x%02x",
__func__, buf[0], ATSC_TABLE_TVCT, ATSC_TABLE_CVCT);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct atsc_table_vct), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
vct = *table;
memcpy(vct, p, size);
p += size;
dvb_table_header_init(&vct->header);
/* find end of curent list */
head = &vct->channel;
while (*head != NULL)
head = &(*head)->next;
size = offsetof(struct atsc_table_vct_channel, descriptor);
for (n = 0; n < vct->num_channels_in_section; n++) {
struct atsc_table_vct_channel *channel;
if (p + size > endbuf) {
dvb_logerr("%s: channel table is missing %d elements",
__func__, vct->num_channels_in_section - n + 1);
vct->num_channels_in_section = n;
break;
}
channel = malloc(sizeof(struct atsc_table_vct_channel));
if (!channel) {
dvb_logerr("%s: out of memory", __func__);
return -4;
}
memcpy(channel, p, size);
p += size;
/* Fix endiannes of the copied fields */
for (i = 0; i < ARRAY_SIZE(channel->__short_name); i++)
bswap16(channel->__short_name[i]);
bswap32(channel->carrier_frequency);
bswap16(channel->channel_tsid);
bswap16(channel->program_number);
bswap32(channel->bitfield1);
bswap16(channel->bitfield2);
bswap16(channel->source_id);
bswap16(channel->bitfield3);
/* Short name is always UTF-16 */
dvb_iconv_to_charset(parms, channel->short_name,
sizeof(channel->short_name),
(const unsigned char *)channel->__short_name,
sizeof(channel->__short_name),
"UTF-16",
parms->output_charset);
/* Fill descriptors */
channel->descriptor = NULL;
channel->next = NULL;
*head = channel;
head = &(*head)->next;
if (endbuf - p < channel->descriptors_length) {
dvb_logerr("%s: short read %d/%zd bytes", __func__,
channel->descriptors_length, endbuf - p);
return -5;
}
/* get the descriptors for each program */
if (dvb_desc_parse(parms, p, channel->descriptors_length,
&channel->descriptor) != 0) {
return -6;
}
p += channel->descriptors_length;
}
/* Get extra descriptors */
size = sizeof(union atsc_table_vct_descriptor_length);
while (p + size <= endbuf) {
union atsc_table_vct_descriptor_length *d = (void *)p;
bswap16(d->descriptor_length);
p += size;
if (endbuf - p < d->descriptor_length) {
dvb_logerr("%s: short read %d/%zd bytes", __func__,
d->descriptor_length, endbuf - p);
return -7;
}
if (dvb_desc_parse(parms, p, d->descriptor_length,
&vct->descriptor) != 0) {
return -8;
}
}
if (endbuf - p)
dvb_logwarn("%s: %zu spurious bytes at the end",
__func__, endbuf - p);
return p - buf;
}
void atsc_table_vct_free(struct atsc_table_vct *vct)
{
struct atsc_table_vct_channel *channel = vct->channel;
while (channel) {
dvb_desc_free((struct dvb_desc **) &channel->descriptor);
struct atsc_table_vct_channel *tmp = channel;
channel = channel->next;
free(tmp);
}
dvb_desc_free(&vct->descriptor);
free(vct);
}
void atsc_table_vct_print(struct dvb_v5_fe_parms *parms, struct atsc_table_vct *vct)
{
const struct atsc_table_vct_channel *channel = vct->channel;
uint16_t channels = 0;
if (vct->header.table_id == ATSC_TABLE_CVCT)
dvb_loginfo("CVCT");
else
dvb_loginfo("TVCT");
ATSC_TABLE_HEADER_PRINT(parms, vct);
dvb_loginfo("|- #channels %d", vct->num_channels_in_section);
dvb_loginfo("|\\ channel_id");
while (channel) {
dvb_loginfo("|- Channel %d.%d: %s",
channel->major_channel_number,
channel->minor_channel_number,
channel->short_name);
dvb_loginfo("| modulation mode %d", channel->modulation_mode);
dvb_loginfo("| carrier frequency %d", channel->carrier_frequency);
dvb_loginfo("| TS ID %d", channel->channel_tsid);
dvb_loginfo("| program number %d", channel->program_number);
dvb_loginfo("| ETM location %d", channel->ETM_location);
dvb_loginfo("| access controlled %d", channel->access_controlled);
dvb_loginfo("| hidden %d", channel->hidden);
if (vct->header.table_id == ATSC_TABLE_CVCT) {
dvb_loginfo("| path select %d", channel->path_select);
dvb_loginfo("| out of band %d", channel->out_of_band);
}
dvb_loginfo("| hide guide %d", channel->hide_guide);
dvb_loginfo("| service type %d", channel->service_type);
dvb_loginfo("| source id %d", channel->source_id);
dvb_desc_print(parms, channel->descriptor);
channel = channel->next;
channels++;
}
dvb_loginfo("|_ %d channels", channels);
}
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