+ class CCECAdapterMessage
+ {
+ public:
+ CCECAdapterMessage(void) {}
+ CCECAdapterMessage(const cec_command &command)
+ {
+ clear();
+
+ //set ack polarity to high when transmitting to the broadcast address
+ //set ack polarity low when transmitting to any other address
+ push_back(MSGSTART);
+ push_escaped(MSGCODE_TRANSMIT_ACK_POLARITY);
+ if (command.destination == CECDEVICE_BROADCAST)
+ push_escaped(CEC_TRUE);
+ else
+ push_escaped(CEC_FALSE);
+ push_back(MSGEND);
+
+ // add source and destination
+ push_back(MSGSTART);
+ push_escaped(MSGCODE_TRANSMIT);
+ push_back(((uint8_t)command.initiator << 4) + (uint8_t)command.destination);
+ push_back(MSGEND);
+
+ // add opcode
+ push_back(MSGSTART);
+ push_escaped(command.parameters.empty() ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
+ push_back((uint8_t) command.opcode);
+ push_back(MSGEND);
+
+ // add parameters
+ for (int8_t iPtr = 0; iPtr < command.parameters.size; iPtr++)
+ {
+ push_back(MSGSTART);
+
+ if (iPtr == command.parameters.size - 1)
+ push_escaped( MSGCODE_TRANSMIT_EOM);
+ else
+ push_escaped(MSGCODE_TRANSMIT);
+
+ push_escaped(command.parameters[iPtr]);
+
+ push_back(MSGEND);
+ }
+ }
+
+ CCECAdapterMessage &operator =(const CCECAdapterMessage &msg)
+ {
+ packet = msg.packet;
+ return *this;
+ }
+
+ bool empty(void) const { return packet.empty(); }
+ uint8_t operator[](uint8_t pos) const { return packet[pos]; }
+ uint8_t at(uint8_t pos) const { return packet[pos]; }
+ uint8_t size(void) const { return packet.size; }
+ void clear(void) { packet.clear(); }
+ void shift(uint8_t iShiftBy) { packet.shift(iShiftBy); }
+ void push_back(uint8_t add) { packet.push_back(add); }
+ cec_adapter_messagecode message(void) const { return packet.size >= 1 ? (cec_adapter_messagecode) (packet.at(0) & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK)) : MSGCODE_NOTHING; }
+ bool eom(void) const { return packet.size >= 1 ? (packet.at(0) & MSGCODE_FRAME_EOM) != 0 : false; }
+ bool ack(void) const { return packet.size >= 1 ? (packet.at(0) & MSGCODE_FRAME_ACK) != 0 : false; }
+ cec_logical_address initiator(void) const { return packet.size >= 2 ? (cec_logical_address) (packet.at(1) >> 4) : CECDEVICE_UNKNOWN; };
+ cec_logical_address destination(void) const { return packet.size >= 2 ? (cec_logical_address) (packet.at(1) & 0xF) : CECDEVICE_UNKNOWN; };
+ void push_escaped(int16_t byte)
+ {
+ if (byte >= MSGESC && byte != MSGSTART)
+ {
+ push_back(MSGESC);
+ push_back(byte - ESCOFFSET);
+ }
+ else
+ push_back(byte);
+ }
+
+ cec_datapacket packet;
+ };
+