Add a --quiet option.

diff --git a/decode.cpp b/decode.cpp
index 1c9733184b013a7310e84c1ecea3b15e643d8a1f..2a27371ac2db191c78c0119e812f8bad01834096 100644 (file)
--- a/decode.cpp
+++ b/decode.cpp
@@ -26,6 +26,7 @@ static bool output_cycles_plot = false;
 static bool use_filter = false;
 static float filter_coeff[NUM_FILTER_COEFF] = { 1.0f };  // The rest is filled with 0.
 static bool output_filtered = false;
+static bool quiet = false;
 
 // between [x,x+1]
 double find_zerocrossing(const std::vector<float> &pcm, int x)
@@ -88,8 +89,10 @@ double calibrate(const std::vector<pulse> &pulses) {
                sync_pulse_end = try_end;
                sync_pulse_stddev = stddev;
        }
-       fprintf(stderr, "Sync pulse length standard deviation: %.2f cycles\n",
-               sync_pulse_stddev);
+       if (!quiet) {
+               fprintf(stderr, "Sync pulse length standard deviation: %.2f cycles\n",
+                       sync_pulse_stddev);
+       }
 
        double sum = 0.0;
        for (int i = SYNC_PULSE_START; i < sync_pulse_end; ++i) {
@@ -97,8 +100,10 @@ double calibrate(const std::vector<pulse> &pulses) {
        }
        double mean_length = C64_FREQUENCY * sum / (sync_pulse_end - SYNC_PULSE_START);
        double calibration_factor = SYNC_PULSE_LENGTH / mean_length;
-       fprintf(stderr, "Calibrated sync pulse length: %.2f -> %.2f (change %+.2f%%)\n",
-               mean_length, SYNC_PULSE_LENGTH, 100.0 * (calibration_factor - 1.0));
+       if (!quiet) {
+               fprintf(stderr, "Calibrated sync pulse length: %.2f -> %.2f (change %+.2f%%)\n",
+                       mean_length, SYNC_PULSE_LENGTH, 100.0 * (calibration_factor - 1.0));
+       }
 
        // Check for pulses outside +/- 10% (sign of misdetection).
        for (int i = SYNC_PULSE_START; i < sync_pulse_end; ++i) {
@@ -149,6 +154,7 @@ static struct option long_options[] = {
        {"hysteresis-limit", required_argument, 0, 'l' },
        {"filter",           required_argument, 0, 'f' },
        {"output-filtered",  0,                 0, 'F' },
+       {"quiet",            0,                 0, 'q' },
        {"help",             0,                 0, 'h' },
        {0,                  0,                 0, 0   }
 };
@@ -162,6 +168,7 @@ void help()
        fprintf(stderr, "  -l, --hysteresis-limit VAL   change amplitude threshold for ignoring pulses (0..32768)\n");
        fprintf(stderr, "  -f, --filter C1:C2:C3:...    specify FIR filter (up to %d coefficients)\n", NUM_FILTER_COEFF);
        fprintf(stderr, "  -F, --output-filtered        output filtered waveform to filtered.raw\n");
+       fprintf(stderr, "  -q, --quiet                  suppress some informational messages\n");
        fprintf(stderr, "  -h, --help                   display this help, then exit\n");
        exit(1);
 }
@@ -170,7 +177,7 @@ void parse_options(int argc, char **argv)
 {
        for ( ;; ) {
                int option_index = 0;
-               int c = getopt_long(argc, argv, "spl:f:Fh", long_options, &option_index);
+               int c = getopt_long(argc, argv, "spl:f:Fqh", long_options, &option_index);
                if (c == -1)
                        break;
 
@@ -182,6 +189,7 @@ void parse_options(int argc, char **argv)
                case 'p':
                        output_cycles_plot = true;
                        break;
+
                case 'l':
                        hysteresis_limit = atof(optarg) / 32768.0;
                        break;
@@ -201,6 +209,10 @@ void parse_options(int argc, char **argv)
                        output_filtered = true;
                        break;
 
+               case 'q':
+                       quiet = true;
+                       break;
+
                case 'h':
                default:
                        help();