void do_708 (const unsigned char *data, int datalength)
{
/* Note: The data has this format:
1 byte for cc_valid
1 byte for cc_type
2 bytes for the actual data */
if (!debug_708)
return;
for (int i=0;i<datalength;i+=4)
{
unsigned char cc_valid=data[i];
unsigned char cc_type=data[i+1];
switch (cc_type)
{
case 2:
// printf ("708: DTVCC Channel Packet Data\n");
if (cc_valid==0) // This ends the previous packet
process_current_packet();
else
{
if (current_packet_length>253)
{
printf ("Warning: Legal packet size exceeded, data not added.\n");
}
else
{
current_packet[current_packet_length++]=data[i+2];
current_packet[current_packet_length++]=data[i+3];
}
}
break;
case 3:
// printf ("708: DTVCC Channel Packet Start\n");
process_current_packet();
if (cc_valid)
{
if (current_packet_length>253)
{
printf ("Warning: Legal packet size exceeded, data not added.\n");
}
else
{
current_packet[current_packet_length++]=data[i+2];
current_packet[current_packet_length++]=data[i+3];
}
}
break;
default:
fatal (EXIT_BUG_BUG, "708: shouldn't be here - cc_type: %d\n", cc_type);
}
}
}
void decode_708 (const unsigned char *data, int datalength, cc708_service_decoder* decoders)
{
/* Note: The data has this format:
1 byte for cc_valid and cc_type
2 bytes for the actual data */
for (int i=0; i<datalength; i+=3)
{
unsigned char cc_valid=data[i] & 0x04;
unsigned char cc_type=data[i] & 0x03;
switch (cc_type)
{
case 0:
// only use 608 as fallback
if (!decoders[0].parent->m_seen708)
decode_cc(decoders[0].parent->m_cc608decoder, (uint8_t*)data+i, 3);
break;
case 2:
if (cc_valid==0) // This ends the previous packet if complete
{
if (check_current_packet_complete(decoders))
{
process_current_packet(decoders);
}
}
else
{
if (decoders[0].parent->m_current_packet_length < 254)
{
decoders[0].parent->m_current_packet[decoders[0].parent->m_current_packet_length++]=data[i+1];
decoders[0].parent->m_current_packet[decoders[0].parent->m_current_packet_length++]=data[i+2];
}
}
break;
case 3:
process_current_packet(decoders);
if (cc_valid)
{
if (decoders[0].parent->m_current_packet_length < 128)
{
decoders[0].parent->m_current_packet[decoders[0].parent->m_current_packet_length++]=data[i+1];
decoders[0].parent->m_current_packet[decoders[0].parent->m_current_packet_length++]=data[i+2];
}
}
break;
default:
break;
}
}
}