Fix repeated frame length

README.md

@@ -26,17 +26,19 @@ Possible applications:
 - robotics
 - sattelite radio communications
 - point to point private radio systems
+- radio communications repeater
 - portable VHF-UHF SDR transceiver
 
 
 Features
 ---
 
+- Transmit and receive analog voice, digital voice, text messages, digital video, IP protocol.
+- Analog and digital mode repeater - full duplex mode, no mixed mode repeater
 - VOIP connection between two or more stations operating in simplex or semi-duplex mode
 - Direct VOIP talk-around
 - Radio forwarding over VOIP - forward analog or digital radio to VOIP connection and viceversa
 - TLS session encryption
-- Transmit and receive analog voice, digital voice, text messages, digital video, IP protocol.
 - Mixed operation mode: transmit one mode and receive another
 - Digital voice codecs: Codec2 700 bit/s, Codec2 1400 bit/s, Opus 9600 bit/s
 - Narrow band digital voice mode with the [Codec2](http://rowetel.com/codec2.html) audio codec

gr/gr_modem.cpp

@@ -626,7 +626,7 @@ void gr_modem::synchronize(int v_size, std::vector<unsigned char> *data)
             if((_modem_type_rx != gr_modem_types::ModemTypeBPSK1000)
                     && (_current_frame_type == FrameTypeVoice))
             {
-                frame_length++;
+                frame_length++; // reserved data
             }
             else
             {
@@ -640,7 +640,10 @@ void gr_modem::synchronize(int v_size, std::vector<unsigned char> *data)
                 if(_repeater && (_current_frame_type == gr_modem::FrameTypeVoice))
                 {
                     unsigned char *repeated_frame = new unsigned char[frame_length];
-                    memcpy(repeated_frame,frame_data,frame_length);
+                    if(_modem_type_rx == gr_modem_types::ModemTypeBPSK1000)
+                        memcpy(repeated_frame, frame_data, _frame_length);
+                    else
+                        memcpy(repeated_frame, frame_data+1, _frame_length); // take into account reserved data
                     processAudioData(repeated_frame, frame_length); // TODO: clean up
                 }
                 processReceivedData(frame_data, _current_frame_type);