int parse_pat(CZapitChannel * const channel)
{
CDemux dmx;
/* buffer for program association table */
unsigned char buffer[PAT_SIZE];
/* current positon in buffer */
unsigned short i;
unsigned char filter[DMX_FILTER_SIZE];
unsigned char mask[DMX_FILTER_SIZE];
if (!channel)
return -1;
memset(filter, 0x00, DMX_FILTER_SIZE);
memset(mask, 0x00, DMX_FILTER_SIZE);
mask[0] = 0xFF;
mask[4] = 0xFF;
do {
/* set filter for program association section */
/* read section */
if ((dmx.sectionFilter(0, filter, mask) < 0) || (dmx.read(buffer, PAT_SIZE) < 0))
return -1;
/* loop over service id / program map table pid pairs */
for (i = 8; i < (((buffer[1] & 0x0F) << 8) | buffer[2]) + 3; i += 4) {
/* compare service id */
if (channel->getServiceId() == ((buffer[i] << 8) | buffer[i+1])) {
/* store program map table pid */
channel->setPmtPid(((buffer[i+2] & 0x1F) << 8) | buffer[i+3]);
return 0;
}
}
} while (filter[4]++ != buffer[7]);
return -1;
}
int parse_nit(const t_satellite_position satellite_position, const unsigned char DiSEqC)
{
CDemux dmx;
unsigned char buffer[NIT_SIZE];
/* position in buffer */
unsigned short pos;
unsigned short pos2;
/* network_information_section elements */
unsigned short section_length;
unsigned short network_descriptors_length;
unsigned short transport_descriptors_length;
unsigned short transport_stream_loop_length;
t_transport_stream_id transport_stream_id;
t_original_network_id original_network_id;
// unsigned short network_id;
transponder_id_t transponder_id;
unsigned char filter[DMX_FILTER_SIZE];
unsigned char mask[DMX_FILTER_SIZE];
memset(filter, 0x00, DMX_FILTER_SIZE);
memset(mask, 0x00, DMX_FILTER_SIZE);
filter[0] = 0x40;
filter[4] = 0x00;
mask[0] = 0xFF;
mask[4] = 0xFF;
do {
if ((dmx.sectionFilter(0x10, filter, mask) < 0) || (dmx.read(buffer, NIT_SIZE) < 0))
return -1;
section_length = ((buffer[1] & 0x0F) << 8) + buffer[2];
// network_id = ((buffer[3] << 8)| buffer [4]);
network_descriptors_length = ((buffer[8] & 0x0F) << 8) | buffer[9];
for (pos = 10; pos < network_descriptors_length + 10; pos += buffer[pos + 1] + 2)
{
switch (buffer[pos])
{
/* case 0x0F:
Private_data_indicator_descriptor(buffer + pos);
break;
*/
case 0x40:
network_name_descriptor(buffer + pos);
break;
case 0x4A:
linkage_descriptor(buffer + pos);
break;
case 0x5B:
multilingual_network_name_descriptor(buffer + pos);
break;
/* case 0x5F:
private_data_specifier_descriptor(buffer + pos);
break;
*/
case 0x80: /* unknown, Eutelsat 13.0E */
break;
case 0x90: /* unknown, Eutelsat 13.0E */
break;
default:
DBG("first_descriptor_tag: %02x", buffer[pos]);
break;
}
}
transport_stream_loop_length = ((buffer[pos] & 0x0F) << 8) | buffer[pos + 1];
if (!transport_stream_loop_length)
continue;
for (pos += 2; pos < section_length - 3; pos += transport_descriptors_length + 6)
{
transport_stream_id = (buffer[pos] << 8) | buffer[pos + 1];
original_network_id = (buffer[pos + 2] << 8) | buffer[pos + 3];
transport_descriptors_length = ((buffer[pos + 4] & 0x0F) << 8) | buffer[pos + 5];
// frequency will be inserted in satellite/cable_delivery_system_descriptor()
transponder_id = CREATE_TRANSPONDER_ID_FROM_FREQUENCY_SATELLITEPOSITION_ORIGINALNETWORK_TRANSPORTSTREAM_ID(0, satellite_position,original_network_id,transport_stream_id);
if (transponders.find(transponder_id) == transponders.end())
{
for (pos2 = pos + 6; pos2 < pos + transport_descriptors_length + 6; pos2 += buffer[pos2 + 1] + 2)
{
switch (buffer[pos2])
{
case 0x41:
service_list_descriptor(buffer + pos2, transport_stream_id, original_network_id);
break;
case 0x42:
stuffing_descriptor(buffer + pos2);
break;
case 0x43:
if (satellite_delivery_system_descriptor(buffer + pos2, transponder_id, DiSEqC) < 0)
return -2;
break;
case 0x44:
if (cable_delivery_system_descriptor(buffer + pos2, transponder_id) < 0)
return -2;
break;
case 0x5A:
if (terrestrial_delivery_system_descriptor(buffer + pos2) < 0)
return -2;
break;
case 0x5F:
private_data_specifier_descriptor(buffer + pos2);
break;
case 0x62:
frequency_list_descriptor(buffer + pos2);
break;
case 0x82: /* unknown, Eutelsat 13.0E */
break;
default:
DBG("second_descriptor_tag: %02x", buffer[pos2]);
break;
}
}
}
}
} while (filter[4]++ != buffer[7]);
return 0;
}