[rffft] Add filename parameter parsing for SDR console .wav files

Signed-off-by: Martin Herren (HB9FXX) <[email protected]>

README.md

@@ -92,6 +92,6 @@ It is also possible to read WAV files. This is compatible with any WAV file, 16
 
     ./rffft -i recording.wav -f 97400000 -s 48000 -F wav -T "YYYY-MM-DDTHH:MM:SS"
 
-For WAV files exported from SatDump the `-P` options will automatically extract the correct parameters from the filename.
+For WAV files exported from SatDump and SDR Console the `-P` options will automatically extract the correct parameters from the filename.
 
 The output spectrograms can be viewed and analysed using `rfplot`.

rffft_internal.c

@@ -20,12 +20,14 @@
 // - GQRX:
 //   - gqrx_20230806_151838_428000000_200000_fc.raw
 //   format always float32
+// - SDR Console:
+//   - 07-Aug-2023 181711.798 401.774MHz.wav
 int rffft_params_from_filename(char * filename, double * samplerate, double * frequency, char * format, char * starttime) {
   // Temp vars to hold parsed values
   int p_year, p_month, p_day, p_hours, p_minutes, p_seconds, p_fractal_seconds;
   int p_dummy_int;
   double p_samplerate, p_frequency;
-  char p_format[16];
+  char p_month_string[16], p_format[16];
   char p_dummy_string[128];
   int parsed_tokens;
 
@@ -166,5 +168,59 @@ int rffft_params_from_filename(char * filename, double * samplerate, double * fr
     return 0;
   }
 
+  // SDR Console
+  parsed_tokens = sscanf(
+    base_filename,
+    "%02d-%3s-%04d %02d%02d%02d.%03d %lfMHz.wav",
+    &p_day,
+    p_month_string,
+    &p_year,
+    &p_hours,
+    &p_minutes,
+    &p_seconds,
+    &p_fractal_seconds,
+    &p_frequency);
+
+  if (parsed_tokens == 8) {
+    *samplerate = 0; // Will be set when opening the wav
+    *frequency = p_frequency * 1e6;
+    *format = 'w';
+
+    int month;
+
+    if ((strlen(p_month_string) == 3) && (strncmp("Jan", p_month_string, 3) == 0)) {
+      month = 1;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Feb", p_month_string, 3) == 0)) {
+      month = 2;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Mar", p_month_string, 3) == 0)) {
+      month = 3;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Apr", p_month_string, 3) == 0)) {
+      month = 4;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("May", p_month_string, 3) == 0)) {
+      month = 5;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Jun", p_month_string, 3) == 0)) {
+      month = 6;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Jul", p_month_string, 3) == 0)) {
+      month = 7;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Aug", p_month_string, 3) == 0)) {
+      month = 8;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Sep", p_month_string, 3) == 0)) {
+      month = 9;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Oct", p_month_string, 3) == 0)) {
+      month = 10;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Nov", p_month_string, 3) == 0)) {
+      month = 11;
+    } else if ((strlen(p_month_string) == 3) && (strncmp("Dec", p_month_string, 3) == 0)) {
+      month = 12;
+    } else {
+      printf("Unparsable month in SDR Console format %s\n", p_format);
+      return -1;
+    }
+
+    snprintf(starttime, 32, "%04d-%02d-%02dT%02d:%02d:%02d.%03d", p_year, month, p_day, p_hours, p_minutes, p_seconds, p_fractal_seconds);
+
+    return 0;
+  }
+
   return -1;
 }

tests/tests_rffft_internal.c

@@ -73,11 +73,31 @@ void rffft_internal_parse_gqrx_filenames(void **state) {
   assert_int_equal(-1, rffft_params_from_filename("gqrx_2023-08-06_15:18:38_428000000_200000_fc.raw", &samplerate, &frequency, &format, starttime));
 }
 
+// Test SDR Console filenames
+void rffft_internal_parse_sdrconsole_filenames(void **state) {
+  double samplerate = 0;
+  double frequency = 0;
+  char format = '\0';
+  char starttime[] = "YYYY-mm-ddTHH:MM:SS.sss";
+  char ref_format = '\0';
+
+  ref_format = 'w';
+  assert_int_equal(0, rffft_params_from_filename("07-Aug-2023 181711.798 401.774MHz.wav", &samplerate, &frequency, &format, starttime));
+  // assert_double_equal has been introduced in cmocka 1.1.6 not available on most distribs yet
+  assert_float_equal(0, samplerate, 1e-12);
+  assert_float_equal(401.774e6, frequency, 1e-12);
+  assert_memory_equal(&ref_format, &format, 1);
+  assert_string_equal("2023-08-07T18:17:11.798", starttime);
+
+  assert_int_equal(-1, rffft_params_from_filename("07-Yol-2023 181711.798 401.774MHz.wav", &samplerate, &frequency, &format, starttime));
+}
+
 // Entry point to run all tests
 int run_rffft_internal_tests() {
   const struct CMUnitTest tests[] = {
     cmocka_unit_test(rffft_internal_parse_satdump_filenames),
     cmocka_unit_test(rffft_internal_parse_gqrx_filenames),
+    cmocka_unit_test(rffft_internal_parse_sdrconsole_filenames),
   };
 
   return cmocka_run_group_tests_name("rffft internal", tests, NULL, NULL);