RTL/NCURSES - Clear Queue and Dibit Buffer; #125

include/dsd.h

@@ -1055,6 +1055,7 @@ bool QR_16_7_6_decode(unsigned char *rxBits);
 
 void InitAllFecFunction(void);
 void resetState (dsd_state * state);
+void reset_dibit_buffer(dsd_state * state);
 void dstar_header_decode(dsd_state * state, int radioheaderbuffer[660]);
 
 //P25 PDU Handler
@@ -1113,6 +1114,7 @@ void get_rtlsdr_sample(int16_t *sample, dsd_opts * opts, dsd_state * state);
 void rtlsdr_sighandler();
 void rtl_dev_tune(dsd_opts * opts, long int frequency);
 int rtl_return_rms();
+void rtl_clean_queue();
 #endif
 //DMR TRELLIS
 void CDMRTrellisTribitsToBits(const unsigned char* tribits, unsigned char* payload);

src/dsd_frame_sync.c

@@ -1415,7 +1415,7 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
             //Preamble plus FSW, proceed right away
             if ( (strncmperr (synctest19, NXDN_PANDFSW, 19, 1) == 0) )
             {
-              // state->carrier = 1;
+              state->carrier = 1;
               state->offset = synctest_pos;
               state->max = ((state->max) + lmax) / 2;
               state->min = ((state->min) + lmin) / 2;
@@ -1428,7 +1428,7 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
             
             else if ( (strncmperr (synctest19, INV_NXDN_PANDFSW, 19, 1) == 0) )
             {
-              // state->carrier = 1;
+              state->carrier = 1;
               state->offset = synctest_pos;
               state->max = ((state->max) + lmax) / 2;
               state->min = ((state->min) + lmin) / 2;
@@ -1441,7 +1441,7 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
 
             else if ( (strncmperr (synctest10, NXDN_FSW, 10, 1) == 0) )
             {
-              // state->carrier = 1;
+              state->carrier = 1;
               state->offset = synctest_pos;
               state->max = ((state->max) + lmax) / 2;
               state->min = ((state->min) + lmin) / 2;
@@ -1459,7 +1459,7 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
 
             else if ( (strncmperr (synctest10, INV_NXDN_FSW, 10, 1) == 0) )
             {
-              // state->carrier = 1;
+              state->carrier = 1;
               state->offset = synctest_pos;
               state->max = ((state->max) + lmax) / 2;
               state->min = ((state->min) + lmin) / 2;

src/dsd_main.c

@@ -1357,7 +1357,7 @@ main (int argc, char **argv)
   }
 
   #ifdef AERO_BUILD
-  fprintf (stderr, "Build Version:  v2.0.1-13 Win32 \n");
+  fprintf (stderr, "Build Version:  v2.0.1-14 Win32 \n");
   #else
   fprintf (stderr, "Build Version:  %s \n", GIT_TAG);
   #endif

src/dsd_ncurses.c

@@ -407,6 +407,13 @@ void ncursesMenu (dsd_opts * opts, dsd_state * state)
     closePulseInput(opts);
   }
 
+  if (opts->audio_in_type == 3)
+  {
+    #ifdef USE_RTLSDR
+    rtl_clean_queue();
+    #endif
+  }
+
   if (opts->audio_in_type == 8) //close TCP input SF file so we don't buffer audio while not decoding
   {
     sf_close(opts->tcp_file_in);
@@ -1658,6 +1665,8 @@ void ncursesMenu (dsd_opts * opts, dsd_state * state)
       opts->rtl_started = 1; //set here so ncurses terminal doesn't attempt to open it again
       open_rtlsdr_stream(opts);
     }
+    rtl_clean_queue();
+    reset_dibit_buffer(state); //test and observe for any random issues, disable if needed
     #elif AERO_BUILD
     opts->audio_out_type = 3; //hopefully the audio stream is still/already open
     #else
@@ -2063,7 +2072,7 @@ ncursesPrinter (dsd_opts * opts, dsd_state * state)
   if (opts->ncurses_compact == 1)
   {
     printw ("------------------------------------------------------------------------------\n");
-    printw ("| Digital Speech Decoder: Florida Man Edition - Aero \n", "v2.0.1-13 Win32");
+    printw ("| Digital Speech Decoder: Florida Man Edition - Aero \n", "v2.0.1-14 Win32");
     printw ("------------------------------------------------------------------------------\n"); 
   }
 #elif LIMAZULUTWEAKS
@@ -2092,7 +2101,7 @@ ncursesPrinter (dsd_opts * opts, dsd_state * state)
       if (i == 4) printw (" MBElib %s", versionstr);
       #ifdef AERO_BUILD
       if (i == 5) printw (" %s ", "Aero Win32");
-      if (i == 6) printw (" v2.0.1-13 Win32 \n");
+      if (i == 6) printw (" v2.0.1-14 Win32 \n");
       #else
       if (i == 5) printw (" %s ", "zDEV BUILD");
       if (i == 6) printw (" %s \n", GIT_TAG);

src/dsd_reset.c

@@ -120,3 +120,15 @@ void resetState (dsd_state * state)
   initialize_p25_heuristics(&state->p25_heuristics);
   initialize_p25_heuristics(&state->inv_p25_heuristics);
 }
+
+//simple function to reset the dibit buffer
+void reset_dibit_buffer(dsd_state * state)
+{
+	//Dibit Buffer -- Free Allocated Memory
+  free (state->dibit_buf);
+
+  //Dibit Buffer -- Memset/Init/Allocate Memory
+  state->dibit_buf = malloc (sizeof (int) * 1000000);
+  state->dibit_buf_p = state->dibit_buf + 200;
+  memset (state->dibit_buf, 0, sizeof (int) * 200);
+}

src/rtl_sdr_fm.cpp

@@ -1094,6 +1094,8 @@ void rtl_dev_tune(dsd_opts * opts, long int frequency)
 	dongle.freq = opts->rtlsdr_center_freq = frequency;
 	optimal_settings(dongle.freq, demod.rate_in);
 	r = verbose_set_frequency(dongle.dev, dongle.freq);
+	rtl_clean_queue();
+
 }
 
 //return RMS value (root means square) power level -- used as soft squelch inside of framesync
@@ -1103,3 +1105,11 @@ int rtl_return_rms()
 	sr = rms(demod.lowpassed, demod.lp_len, 1);
 	return (sr);
 }
+
+//simple function to clear the rtl sample queue when tuning and during other events (ncurses menu open/close)
+void rtl_clean_queue()
+{
+	//insert method to clear the entire queue to prevent sample 'lag'
+	std::queue<int16_t> empty; //create an empty queue
+	std::swap( output.queue, empty ); //swap in empty queue to effectively zero out current queue
+}