// ----------------------------------------------------------------------------- // // Copyright (C) 2012-2018 Fons Adriaensen // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see . // // ----------------------------------------------------------------------------- #include #include #include #include #include #include #include #include "mtdm.h" static MTDM *mtdm = 0; static jack_client_t *jack_handle; static jack_port_t *jack_capt; static jack_port_t *jack_play; static const char *jack_name; static volatile bool active = false; int jack_callback (jack_nframes_t nframes, void *arg) { float *ip, *op; if (active) { ip = (float *)(jack_port_get_buffer (jack_capt, nframes)); op = (float *)(jack_port_get_buffer (jack_play, nframes)); mtdm->process (nframes, ip, op); } return 0; } static char *options = (char *)"hO:I:E"; static bool E_opt = false; static const char *I_val = 0; static const char *O_val = 0; static void help (void) { fprintf (stderr, "\njack_delay %s\n", VERSION); fprintf (stderr, "(C) 2003-2013 Fons Adriaensen \n"); fprintf (stderr, "Measure round trip latency of a soundcard.\n"); fprintf (stderr, "Usage: jack_delay \n"); fprintf (stderr, "Options:\n"); fprintf (stderr, " -h Display this text\n"); fprintf (stderr, " -O Connect output to named port.\n"); fprintf (stderr, " -I Connect input to named port.\n"); fprintf (stderr, " -E Report excess latency, requires both -I and -O.\n"); fprintf (stderr, "The excess latency is the measured value minus the\n"); fprintf (stderr, "expected value for the given ports including any\n"); fprintf (stderr, "corrections set by Jack's -I and -O options.\n"); exit (1); } static void procoptions (int ac, char *av [], const char *where) { int k; optind = 1; opterr = 0; while ((k = getopt (ac, av, options)) != -1) { if (optarg && (*optarg == '-')) { fprintf (stderr, "\n%s\n", where); fprintf (stderr, " Missing argument for '-%c' option.\n", k); fprintf (stderr, " Use '-h' to see all options.\n"); exit (1); } switch (k) { case 'h' : help (); exit (0); case 'E' : E_opt = true; break; case 'I' : I_val = optarg; break; case 'O' : O_val = optarg; break; case '?': fprintf (stderr, "\n%s\n", where); if (optopt != ':' && strchr (options, optopt)) { fprintf (stderr, " Missing argument for '-%c' option.\n", optopt); } else if (isprint (optopt)) { fprintf (stderr, " Unknown option '-%c'.\n", optopt); } else { fprintf (stderr, " Unknown option character '0x%02x'.\n", optopt & 255); } fprintf (stderr, " Use '-h' to see all options.\n"); exit (1); default: abort (); } } } static void sigint_handler (int) { signal (SIGINT, SIG_IGN); active = false; } int main (int ac, char *av []) { double d, dcapt, dplay, t; char b [1024]; jack_status_t s; jack_latency_range_t range; procoptions (ac, av, "On command line:"); if (E_opt) { if (! I_val || ! O_val) { fprintf (stderr, "The -E option requires the use of -I and -O.\n"); return 1; } } jack_handle = jack_client_open ("jack_delay", JackNoStartServer, &s); if (jack_handle == 0) { fprintf (stderr, "Can't connect to Jack, is the server running ?\n"); return 1; } jack_set_process_callback (jack_handle, jack_callback, 0); if (jack_activate (jack_handle)) { fprintf(stderr, "Can't activate Jack"); return 1; } jack_name = jack_get_client_name (jack_handle); jack_capt = jack_port_register (jack_handle, "in", JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0); jack_play = jack_port_register (jack_handle, "out", JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0); mtdm = new MTDM (jack_get_sample_rate (jack_handle)); if (O_val) { sprintf (b, "%s:out", jack_name); if (jack_connect (jack_handle, b, O_val)) { fprintf (stderr, "Can't connect '%s' to '%s'.\n", b, O_val); exit (1); } } if (I_val) { sprintf (b, "%s:in", jack_name); if (jack_connect (jack_handle, I_val, b)) { fprintf (stderr, "Can't connect '%s' to '%s'.\n", I_val, b); exit (1); } } // jack_port_get_latency_range (jack_capt, JackCaptureLatency, &range); // printf ("Latency on input port: %6d %6d\n", range.min, range.max); // jack_port_get_latency_range (jack_play, JackPlaybackLatency, &range); // printf ("Latency on output port: %6d %6d\n", range.min, range.max); if (E_opt) { jack_port_get_latency_range (jack_port_by_name (jack_handle, I_val), JackCaptureLatency, &range); printf ("Latency on capture port: %6d %6d\n", range.min, range.max); dcapt = 0.5 * (range.max + range.min); jack_port_get_latency_range (jack_port_by_name (jack_handle, O_val), JackPlaybackLatency, &range); printf ("Latency on playback port: %6d %6d\n", range.min, range.max); dplay = 0.5 * (range.max + range.min); } else dcapt = dplay = 0; signal (SIGINT, sigint_handler); t = 1000.0 / jack_get_sample_rate (jack_handle); active = true; while (active) { usleep (250000); if (mtdm->resolve () < 0) printf ("Signal below threshold...\n"); else { if (mtdm->err () > 0.35f) { mtdm->invert (); mtdm->resolve (); } d = mtdm->del (); if (E_opt) d -= dcapt + dplay; if (mtdm->err () > 0.30f) printf ("??? "); else if (mtdm->inv ()) printf ("Inv "); else printf (" "); printf ("%10.3lf frames %8.3lf ms\n", d, d * t); } fflush (stdout); } jack_deactivate (jack_handle); jack_client_close (jack_handle); return 0; }