src/jack-smf-recorder.c

   1 /*-
   2  * Copyright (c) 2007, 2008 Edward Tomasz Napierała <trasz@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * ALTHOUGH THIS SOFTWARE IS MADE OF WIN AND SCIENCE, IT IS PROVIDED BY THE
  15  * AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  16  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  17  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
  18  * THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  19  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  20  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
  21  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  23  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  24  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  */
  27
  28 /*
  29  * This is jack-smf-recorder, Standard MIDI File recorder for JACK MIDI.
  30  *
  31  * For questions and comments, contact Edward Tomasz Napierala <trasz@FreeBSD.org>.
  32  */
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <sys/types.h>
  37 #include <sys/time.h>
  38 #include <unistd.h>
  39 #include <assert.h>
  40 #include <string.h>
  41 #include <sysexits.h>
  42 #include <errno.h>
  43 #include <signal.h>
  44 #include <jack/jack.h>
  45 #include <jack/midiport.h>
  46 #include <glib.h>
  47
  48 #include "config.h"
  49 #include "smf.h"
  50
  51 #ifdef WITH_LASH
  52 #include <lash/lash.h>
  53 #endif
  54
  55 #define INPUT_PORT_NAME         "midi_in"
  56 #define PROGRAM_NAME            "jack-smf-recorder"
  57 #define PROGRAM_VERSION         PACKAGE_VERSION
  58
  59 jack_client_t   *jack_client = NULL;
  60 jack_port_t     *input_port;
  61 volatile int    ctrl_c_pressed = 0;
  62 smf_t           *smf = NULL;
  63 smf_track_t     *tracks[16]; /* We allocate one track per MIDI channel. */
  64
  65 #ifdef WITH_LASH
  66 lash_client_t   *lash_client;
  67 #endif
  68
  69 /* Will emit a warning if time between jack callbacks is longer than this. */
  70 #define MAX_TIME_BETWEEN_CALLBACKS      0.1
  71
  72 /* Will emit a warning if execution of jack callback takes longer than this. */
  73 #define MAX_PROCESSING_TIME     0.01
  74
  75 double
  76 get_time(void)
  77 {
  78         double          seconds;
  79         int             ret;
  80         struct timeval  tv;
  81
  82         ret = gettimeofday(&tv, NULL);
  83
  84         if (ret) {
  85                 perror("gettimeofday");
  86                 exit(EX_OSERR);
  87         }
  88
  89         seconds = tv.tv_sec + tv.tv_usec / 1000000.0;
  90
  91         return seconds;
  92 }
  93
  94 double
  95 get_delta_time(void)
  96 {
  97         static double   previously = -1.0;
  98         double          now;
  99         double          delta;
 100
 101         now = get_time();
 102
 103         if (previously == -1.0) {
 104                 previously = now;
 105
 106                 return 0;
 107         }
 108
 109         delta = now - previously;
 110         previously = now;
 111
 112         assert(delta >= 0.0);
 113
 114         return delta;
 115 }
 116
 117 static gboolean
 118 warning_async(gpointer s)
 119 {
 120         const char *str = (const char *)s;
 121
 122         g_warning(str);
 123
 124         return FALSE;
 125 }
 126
 127 static void
 128 warn_from_jack_thread_context(const char *str)
 129 {
 130         g_idle_add(warning_async, (gpointer)str);
 131 }
 132
 133 static double
 134 nframes_to_ms(jack_nframes_t nframes)
 135 {
 136         jack_nframes_t sr;
 137
 138         sr = jack_get_sample_rate(jack_client);
 139
 140         assert(sr > 0);
 141
 142         return (nframes * 1000.0) / (double)sr;
 143 }
 144
 145 static double
 146 nframes_to_seconds(jack_nframes_t nframes)
 147 {
 148         return nframes_to_ms(nframes) / 1000.0;
 149 }
 150
 151 void
 152 process_midi_input(jack_nframes_t nframes)
 153 {
 154         int             read, events, i, channel;
 155         void           *port_buffer;
 156         jack_midi_event_t event;
 157         int             last_frame_time;
 158         static int      time_of_first_event = -1;
 159
 160         last_frame_time = jack_last_frame_time(jack_client);
 161
 162         port_buffer = jack_port_get_buffer(input_port, nframes);
 163         if (port_buffer == NULL) {
 164                 warn_from_jack_thread_context("jack_port_get_buffer failed, cannot receive anything.");
 165                 return;
 166         }
 167
 168 #ifdef JACK_MIDI_NEEDS_NFRAMES
 169         events = jack_midi_get_event_count(port_buffer, nframes);
 170 #else
 171         events = jack_midi_get_event_count(port_buffer);
 172 #endif
 173
 174         for (i = 0; i < events; i++) {
 175                 smf_event_t *smf_event;
 176
 177 #ifdef JACK_MIDI_NEEDS_NFRAMES
 178                 read = jack_midi_event_get(&event, port_buffer, i, nframes);
 179 #else
 180                 read = jack_midi_event_get(&event, port_buffer, i);
 181 #endif
 182                 if (read) {
 183                         warn_from_jack_thread_context("jack_midi_event_get failed, RECEIVED NOTE LOST.");
 184                         continue;
 185                 }
 186
 187                 /* Ignore realtime messages. */
 188                 if (event.buffer[0] >= 0xF8)
 189                         continue;
 190
 191                 /* First event received? */
 192                 if (time_of_first_event == -1)
 193                         time_of_first_event = last_frame_time + event.time;
 194
 195                 smf_event = smf_event_new_from_pointer(event.buffer, event.size);
 196                 if (smf_event == NULL) {
 197                         warn_from_jack_thread_context("smf_event_from_pointer failed, RECEIVED NOTE LOST.");
 198                         continue;
 199                 }
 200
 201                 assert(smf_event->midi_buffer_length >= 1);
 202                 channel = smf_event->midi_buffer[0] & 0x0F;
 203
 204                 smf_track_add_event_seconds(tracks[channel], smf_event,
 205                         nframes_to_seconds(jack_last_frame_time(jack_client) + event.time - time_of_first_event));
 206         }
 207 }
 208
 209 static int
 210 process_callback(jack_nframes_t nframes, void *notused)
 211 {
 212 #ifdef MEASURE_TIME
 213         if (get_delta_time() > MAX_TIME_BETWEEN_CALLBACKS) {
 214                 warn_from_jack_thread_context("Had to wait too long for JACK callback; scheduling problem?");
 215         }
 216 #endif
 217
 218         /* Check for impossible condition that actually happened to me, caused by some problem between jackd and OSS4. */
 219         if (nframes <= 0) {
 220                 warn_from_jack_thread_context("Process callback called with nframes = 0; bug in JACK?");
 221                 return 0;
 222         }
 223
 224         process_midi_input(nframes);
 225
 226 #ifdef MEASURE_TIME
 227         if (get_delta_time() > MAX_PROCESSING_TIME) {
 228                 warn_from_jack_thread_context("Processing took too long; scheduling problem?");
 229         }
 230 #endif
 231
 232         return 0;
 233 }
 234
 235 /* Connects to the specified input port, disconnecting already connected ports. */
 236 int
 237 connect_to_output_port(const char *port)
 238 {
 239         int ret;
 240
 241         ret = jack_port_disconnect(jack_client, input_port);
 242
 243         if (ret) {
 244                 g_warning("Cannot disconnect MIDI port.");
 245
 246                 return -3;
 247         }
 248
 249         ret = jack_connect(jack_client, port, jack_port_name(input_port));
 250
 251         if (ret) {
 252                 g_warning("Cannot connect to %s.", port);
 253
 254                 return -4;
 255         }
 256
 257         g_warning("Connected to %s.", port);
 258
 259         return 0;
 260 }
 261
 262 void
 263 init_jack(void)
 264 {
 265         int err;
 266
 267 #ifdef WITH_LASH
 268         lash_event_t *event;
 269 #endif
 270
 271         jack_client = jack_client_open(PROGRAM_NAME, JackNullOption, NULL);
 272
 273         if (jack_client == NULL) {
 274                 g_critical("Could not connect to the JACK server; run jackd first?");
 275                 exit(EX_UNAVAILABLE);
 276         }
 277
 278 #ifdef WITH_LASH
 279         event = lash_event_new_with_type(LASH_Client_Name);
 280         assert (event); /* Documentation does not say anything about return value. */
 281         lash_event_set_string(event, jack_get_client_name(jack_client));
 282         lash_send_event(lash_client, event);
 283
 284         lash_jack_client_name(lash_client, jack_get_client_name(jack_client));
 285 #endif
 286
 287         err = jack_set_process_callback(jack_client, process_callback, 0);
 288         if (err) {
 289                 g_critical("Could not register JACK process callback.");
 290                 exit(EX_UNAVAILABLE);
 291         }
 292
 293         input_port = jack_port_register(jack_client, INPUT_PORT_NAME, JACK_DEFAULT_MIDI_TYPE,
 294                 JackPortIsInput, 0);
 295
 296         if (input_port == NULL) {
 297                 g_critical("Could not register JACK input port.");
 298                 exit(EX_UNAVAILABLE);
 299         }
 300
 301         if (jack_activate(jack_client)) {
 302                 g_critical("Cannot activate JACK client.");
 303                 exit(EX_UNAVAILABLE);
 304         }
 305 }
 306
 307 #ifdef WITH_LASH
 308
 309 static gboolean
 310 lash_callback(gpointer notused)
 311 {
 312         lash_event_t    *event;
 313
 314         while ((event = lash_get_event(lash_client))) {
 315                 switch (lash_event_get_type(event)) {
 316                         case LASH_Restore_Data_Set:
 317                         case LASH_Save_Data_Set:
 318                                 break;
 319
 320                         case LASH_Quit:
 321                                 g_warning("Exiting due to LASH request.");
 322                                 ctrl_c_pressed = 1;
 323                                 break;
 324
 325                         default:
 326                                 g_warning("Receieved unknown LASH event of type %d.", lash_event_get_type(event));
 327                                 lash_event_destroy(event);
 328                 }
 329         }
 330
 331         return TRUE;
 332 }
 333
 334 static void
 335 init_lash(lash_args_t *args)
 336 {
 337         /* XXX: Am I doing the right thing wrt protocol version? */
 338         lash_client = lash_init(args, PROGRAM_NAME, LASH_Config_Data_Set, LASH_PROTOCOL(2, 0));
 339
 340         if (!lash_server_connected(lash_client)) {
 341                 g_critical("Cannot initialize LASH.  Continuing anyway.");
 342                 /* exit(EX_UNAVAILABLE); */
 343
 344                 return;
 345         }
 346
 347         /* Schedule a function to process LASH events, ten times per second. */
 348         g_timeout_add(100, lash_callback, NULL);
 349 }
 350
 351 #endif /* WITH_LASH */
 352
 353 gboolean
 354 writer_timeout(gpointer file_name_gpointer)
 355 {
 356         int i;
 357         char *file_name = (char *)file_name_gpointer;
 358
 359         /*
 360          * XXX: It should be done like this: http://wwwtcs.inf.tu-dresden.de/~tews/Gtk/x2992.html
 361          */
 362         if (ctrl_c_pressed == 0)
 363                 return TRUE;
 364
 365         jack_deactivate(jack_client);
 366
 367         /* Get rid of empty tracks. */
 368         smf_rewind(smf);
 369
 370         for (i = 0; i < 16; i++) {
 371                 if (tracks[i]->number_of_events == 0) {
 372                         smf_remove_track(tracks[i]);
 373                         smf_track_delete(tracks[i]);
 374                 }
 375         }
 376
 377         if (smf->number_of_tracks == 0) {
 378                 g_message("No events recorded, not saving anything.");
 379                 exit(0);
 380         }
 381
 382         if (smf_save(smf, file_name)) {
 383                 g_critical("Could not save file '%s', sorry.", file_name);
 384                 exit(-1);
 385         }
 386
 387         g_message("File '%s' saved successfully.", file_name);
 388
 389         exit(0);
 390 }
 391
 392 void
 393 ctrl_c_handler(int signum)
 394 {
 395         ctrl_c_pressed = 1;
 396 }
 397
 398 static void
 399 log_handler(const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer notused)
 400 {
 401         fprintf(stderr, "%s: %s\n", log_domain, message);
 402 }
 403
 404 static void
 405 show_version(void)
 406 {
 407         fprintf(stdout, "%s %s, libsmf %s\n", PROGRAM_NAME, PROGRAM_VERSION, smf_get_version());
 408
 409         exit(EX_OK);
 410 }
 411
 412 static void
 413 usage(void)
 414 {
 415         fprintf(stderr, "usage: jack-smf-recorder [-V] [ -a <output port>] file_name\n");
 416
 417         exit(EX_USAGE);
 418 }
 419
 420 int
 421 main(int argc, char *argv[])
 422 {
 423         int             ch, i;
 424         char            *file_name, *autoconnect_port_name = NULL;
 425
 426 #ifdef WITH_LASH
 427         lash_args_t *lash_args;
 428 #endif
 429
 430         g_thread_init(NULL);
 431
 432 #ifdef WITH_LASH
 433         lash_args = lash_extract_args(&argc, &argv);
 434 #endif
 435
 436         g_log_set_default_handler(log_handler, NULL);
 437
 438         while ((ch = getopt(argc, argv, "a:V")) != -1) {
 439                 switch (ch) {
 440                         case 'a':
 441                                 autoconnect_port_name = strdup(optarg);
 442                                 break;
 443
 444                         case 'V':
 445                                 show_version();
 446                                 break;
 447
 448                         case '?':
 449                         default:
 450                                 usage();
 451                 }
 452         }
 453
 454         argc -= optind;
 455         argv += optind;
 456
 457         if (argc == 0)
 458                 usage();
 459
 460         file_name = argv[0];
 461
 462         smf = smf_new();
 463
 464         if (smf == NULL)
 465                 exit(-1);
 466
 467         for (i = 0; i < 16; i++) {
 468                 tracks[i] = smf_track_new();
 469                 if (tracks[i] == NULL)
 470                         exit(-1);
 471                 smf_add_track(smf, tracks[i]);
 472         }
 473
 474 #ifdef WITH_LASH
 475         init_lash(lash_args);
 476 #endif
 477
 478         init_jack();
 479
 480         if (autoconnect_port_name) {
 481                 if (connect_to_output_port(autoconnect_port_name)) {
 482                         g_critical("Couldn't connect to '%s', exiting.", autoconnect_port_name);
 483                         exit(EX_UNAVAILABLE);
 484                 }
 485         }
 486
 487         g_timeout_add(100, writer_timeout, (gpointer)argv[0]);
 488         signal(SIGINT, ctrl_c_handler);
 489
 490         g_message("Recording will start at the first received note; press ^C to write the file and exit.");
 491
 492         g_main_loop_run(g_main_loop_new(NULL, TRUE));
 493
 494         /* Not reached. */
 495
 496         return 0;
 497 }
 498