/**
* This processes each (control, data) tuple according to the state machine
*/
void RDMSniffer::ProcessTuple(uint8_t control_byte, uint8_t data_byte) {
if (control_byte & DATA_MASK) {
// this is an actual byte of data
switch (m_state) {
case IDLE:
case MAB:
m_state = DATA;
m_frame.Reset();
case DATA:
m_frame.AddByte(data_byte);
break;
default:
OLA_WARN << "Unknown transition from state " << m_state
<< ", with data " << ToHex(control_byte) << " "
<< ToHex(data_byte);
}
} else {
// control byte
if (data_byte == 0) {
switch (m_state) {
case BREAK:
m_state = MAB;
break;
default:
OLA_WARN << "Unknown transition from state " << m_state
<< ", with data " << ToHex(control_byte) << " "
<< ToHex(data_byte);
}
} else if (data_byte == 1) {
switch (m_state) {
case IDLE:
m_state = BREAK;
break;
case DATA:
ProcessFrame();
m_state = BREAK;
break;
default:
OLA_WARN << "Unknown transition from state " << m_state
<< ", with data " << ToHex(control_byte) << " "
<< ToHex(data_byte);
}
} else if (data_byte == 2) {
switch (m_state) {
case IDLE:
case BREAK:
case MAB:
break;
case DATA:
m_state = IDLE;
ProcessFrame();
}
} else {
OLA_WARN << "Unknown transition from state " << m_state
<< ", with data " << ToHex(control_byte) << " "
<< ToHex(data_byte);
}
}
}
/**
* Display a non (DMX/RDM) frame
*/
void RDMSniffer::DisplayAlternateFrame() {
unsigned int slot_count = m_frame.Size() - 1;
MaybePrintTimestamp();
cout << "SC " << ToHex(m_frame[0]) << " " << slot_count << ":";
unsigned int slots_to_display = std::min(
slot_count,
static_cast<unsigned int>(m_options.dmx_slot_limit));
DisplayRawData(1, slots_to_display);
}
/**
* Dump out the raw data if we couldn't parse it correctly.
*/
void RDMSniffer::DisplayRawData(unsigned int start, unsigned int end) {
for (unsigned int i = start; i <= end; i++) {
cout << ToHex(m_frame[i], false) << " ";
}
cout << endl;
}
