int parse_nit(t_satellite_position satellitePosition, freq_id_t freq)
{
int ret = 0;
int secdone[255];
int sectotal = -1;
for(int i = 0; i < 255; i++)
secdone[i] = 0;
cDemux * dmx = new cDemux();;
dmx->Open(DMX_PSI_CHANNEL);
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;
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;
//unsigned char sec = 0x00;
if (dmx->sectionFilter(0x10, filter, mask, 5) < 0) {
delete dmx;
return -1;
}
do {
if (dmx->Read(buffer, NIT_SIZE) < 0) {
delete dmx;
return -1;
}
if(buffer[0] != 0x40)
printf("[NIT] ******************************************* Bogus section received: 0x%x\n", buffer[0]);
section_length = ((buffer[1] & 0x0F) << 8) + buffer[2];
network_id = ((buffer[3] << 8)| buffer [4]);
network_descriptors_length = ((buffer[8] & 0x0F) << 8) | buffer[9];
unsigned char secnum = buffer[6];
printf("[NIT] section %X last %X network_id 0x%x -> %s\n", secnum, buffer[7], network_id, secdone[secnum] ? "skip" : "use");
if(secdone[secnum]) // mark sec XX done
continue;
secdone[secnum] = 1;
sectotal++;
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\n", 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];
//if (transponders.find((transport_stream_id << 16) | original_network_id) == transponders.end())
//if (scantransponders.find(CREATE_TRANSPONDER_ID_FROM_SATELLITEPOSITION_ORIGINALNETWORK_TRANSPORTSTREAM_ID(freq, satellitePosition, original_network_id, transport_stream_id)) == scantransponders.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, satellitePosition, freq);
break;
case 0x42:
stuffing_descriptor(buffer + pos2);
break;
case 0x43:
if (satellite_delivery_system_descriptor(buffer + pos2, transport_stream_id, original_network_id, satellitePosition, freq) < 0)
{
ret = -2;
goto _return;
}
break;
case 0x44:
if (cable_delivery_system_descriptor(buffer + pos2, transport_stream_id, original_network_id, satellitePosition, freq) < 0)
{
ret = -2;
goto _return;
}
break;
case 0x5A:
if (terrestrial_delivery_system_descriptor(buffer + pos2) < 0)
{
ret = -2;
goto _return;
}
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\n", buffer[pos2]);
break;
}
}
}
}
} while(sectotal < buffer[7]);
//} while (filter[4]++ != buffer[7]);
_return:
dmx->Stop();
delete dmx;
return ret;
}
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;
}
