example-clients/netsource.c

   1 /*
   2 NetJack Client
   3
   4 Copyright (C) 2008 Marc-Olivier Barre <marco@marcochapeau.org>
   5 Copyright (C) 2008 Pieter Palmers <pieterpalmers@users.sourceforge.net>
   6 Copyright (C) 2006 Torben Hohn <torbenh@gmx.de>
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 /** @file netsource.c
  25  *
  26  * @brief This client connects a remote slave JACK to a local JACK server assumed to be the master
  27  */
  28
  29
  30 #include <stdio.h>
  31 #include <errno.h>
  32 #include <unistd.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <signal.h>
  36
  37 #if defined(HAVE_CONFIG_H)
  38 #include "config.h"
  39 #endif
  40
  41 #ifdef WIN32
  42 #include <winsock2.h>
  43 #define socklen_t int
  44 #include <malloc.h>
  45 #else
  46 #include <netinet/in.h>
  47 #include <netdb.h>
  48 #include <sys/socket.h>
  49 #endif
  50
  51 /* These two required by FreeBSD. */
  52 #include <sys/types.h>
  53
  54 #include <jack/jack.h>
  55
  56 #include <netjack_packet.h>
  57 #if HAVE_SAMPLERATE
  58 #include <samplerate.h>
  59 #endif
  60
  61 #if HAVE_CELT
  62 #include <celt/celt.h>
  63 #endif
  64
  65 #ifndef CUSTOM_MODES
  66 #define CUSTOM_MODES // for opus_custom_decoder_init
  67 #endif
  68
  69 #if HAVE_OPUS
  70 #include <opus/opus.h>
  71 #include <opus/opus_custom.h>
  72 #endif
  73
  74 #include <math.h>
  75
  76 JSList *capture_ports = NULL;
  77 JSList *capture_srcs = NULL;
  78 int capture_channels = 0;
  79 int capture_channels_audio = 2;
  80 int capture_channels_midi = 1;
  81 JSList *playback_ports = NULL;
  82 JSList *playback_srcs = NULL;
  83 int playback_channels = 0;
  84 int playback_channels_audio = 2;
  85 int playback_channels_midi = 1;
  86 int dont_htonl_floats = 0;
  87
  88 int latency = 5;
  89 jack_nframes_t factor = 1;
  90 int bitdepth = 0;
  91 int mtu = 1400;
  92 int reply_port = 0;
  93 int bind_port = 0;
  94 int redundancy = 1;
  95 jack_client_t *client;
  96 packet_cache * packcache = 0;
  97
  98 int state_connected = 0;
  99 int state_latency = 0;
 100 int state_netxruns = 0;
 101 int state_currentframe = 0;
 102 int state_recv_packet_queue_time = 0;
 103
 104 int quit = 0;
 105
 106
 107 int outsockfd;
 108 int insockfd;
 109 #ifdef WIN32
 110 struct sockaddr_in destaddr;
 111 struct sockaddr_in bindaddr;
 112 #else
 113 struct sockaddr destaddr;
 114 struct sockaddr bindaddr;
 115 #endif
 116
 117 int sync_state;
 118 jack_transport_state_t last_transport_state;
 119
 120 int framecnt = 0;
 121
 122 int cont_miss = 0;
 123
 124 int freewheeling = 0;
 125
 126 /**
 127  * This Function allocates all the I/O Ports which are added the lists.
 128  */
 129 void
 130 alloc_ports (int n_capture_audio, int n_playback_audio, int n_capture_midi, int n_playback_midi)
 131 {
 132
 133     int port_flags = JackPortIsOutput;
 134     int chn;
 135     jack_port_t *port;
 136     char buf[32];
 137
 138     capture_ports = NULL;
 139     /* Allocate audio capture channels */
 140     for (chn = 0; chn < n_capture_audio; chn++) {
 141         snprintf (buf, sizeof (buf) - 1, "capture_%u", chn + 1);
 142         port = jack_port_register (client, buf, JACK_DEFAULT_AUDIO_TYPE, port_flags, 0);
 143         if (!port) {
 144             printf( "jack_netsource: cannot register %s port\n", buf);
 145             break;
 146         }
 147         if (bitdepth == 1000) {
 148 #if HAVE_CELT
 149 #if HAVE_CELT_API_0_11
 150             CELTMode *celt_mode = celt_mode_create( jack_get_sample_rate( client ), jack_get_buffer_size(client), NULL );
 151             capture_srcs = jack_slist_append(capture_srcs, celt_decoder_create_custom( celt_mode, 1, NULL ) );
 152 #elif HAVE_CELT_API_0_7 || HAVE_CELT_API_0_8
 153             CELTMode *celt_mode = celt_mode_create( jack_get_sample_rate( client ), jack_get_buffer_size(client), NULL );
 154             capture_srcs = jack_slist_append(capture_srcs, celt_decoder_create( celt_mode, 1, NULL ) );
 155 #else
 156             CELTMode *celt_mode = celt_mode_create( jack_get_sample_rate( client ), 1, jack_get_buffer_size(client), NULL );
 157             capture_srcs = jack_slist_append(capture_srcs, celt_decoder_create( celt_mode ) );
 158 #endif
 159 #endif
 160         } else if (bitdepth == 999) {
 161 #if HAVE_OPUS
 162             int err;
 163             OpusCustomMode *opus_mode = opus_custom_mode_create(jack_get_sample_rate( client ), jack_get_buffer_size(client), &err);
 164             if (err != OPUS_OK) { printf("OPUS MODE FAILED\n"); }
 165             OpusCustomDecoder *decoder = opus_custom_decoder_create(opus_mode, 1, &err);
 166             if (err != OPUS_OK) { printf("OPUS DECODER FAILED\n"); }
 167             opus_custom_decoder_init(decoder, opus_mode, 1);
 168             capture_srcs = jack_slist_append(capture_srcs, decoder);
 169 #endif
 170         } else {
 171 #if HAVE_SAMPLERATE
 172             capture_srcs = jack_slist_append (capture_srcs, src_new (SRC_LINEAR, 1, NULL));
 173 #endif
 174         }
 175         capture_ports = jack_slist_append (capture_ports, port);
 176     }
 177
 178     /* Allocate midi capture channels */
 179     for (chn = n_capture_audio; chn < n_capture_midi + n_capture_audio; chn++) {
 180         snprintf (buf, sizeof (buf) - 1, "capture_%u", chn + 1);
 181         port = jack_port_register (client, buf, JACK_DEFAULT_MIDI_TYPE, port_flags, 0);
 182         if (!port) {
 183             printf ("jack_netsource: cannot register %s port\n", buf);
 184             break;
 185         }
 186         capture_ports = jack_slist_append(capture_ports, port);
 187     }
 188
 189     /* Allocate audio playback channels */
 190     port_flags = JackPortIsInput;
 191     playback_ports = NULL;
 192     for (chn = 0; chn < n_playback_audio; chn++) {
 193         snprintf (buf, sizeof (buf) - 1, "playback_%u", chn + 1);
 194         port = jack_port_register (client, buf, JACK_DEFAULT_AUDIO_TYPE, port_flags, 0);
 195         if (!port) {
 196             printf ("jack_netsource: cannot register %s port\n", buf);
 197             break;
 198         }
 199         if( bitdepth == 1000 ) {
 200 #if HAVE_CELT
 201 #if HAVE_CELT_API_0_11
 202             CELTMode *celt_mode = celt_mode_create( jack_get_sample_rate (client), jack_get_buffer_size(client), NULL );
 203             playback_srcs = jack_slist_append(playback_srcs, celt_encoder_create_custom( celt_mode, 1, NULL ) );
 204 #elif HAVE_CELT_API_0_7 || HAVE_CELT_API_0_8
 205             CELTMode *celt_mode = celt_mode_create( jack_get_sample_rate (client), jack_get_buffer_size(client), NULL );
 206             playback_srcs = jack_slist_append(playback_srcs, celt_encoder_create( celt_mode, 1, NULL ) );
 207 #else
 208             CELTMode *celt_mode = celt_mode_create( jack_get_sample_rate (client), 1, jack_get_buffer_size(client), NULL );
 209             playback_srcs = jack_slist_append(playback_srcs, celt_encoder_create( celt_mode ) );
 210 #endif
 211 #endif
 212         } else if( bitdepth == 999 ) {
 213 #if HAVE_OPUS
 214             const int kbps = factor;
 215             printf("new opus encoder %d kbps\n", kbps);
 216             int err;
 217             OpusCustomMode *opus_mode = opus_custom_mode_create(jack_get_sample_rate (client), jack_get_buffer_size(client), &err ); // XXX free me
 218             if (err != OPUS_OK) { printf("OPUS MODE FAILED\n"); }
 219             OpusCustomEncoder *oe = opus_custom_encoder_create( opus_mode, 1, &err );
 220             if (err != OPUS_OK) { printf("OPUS ENCODER FAILED\n"); }
 221             opus_custom_encoder_ctl(oe, OPUS_SET_BITRATE(kbps*1024)); // bits per second
 222             opus_custom_encoder_ctl(oe, OPUS_SET_COMPLEXITY(10));
 223             opus_custom_encoder_ctl(oe, OPUS_SET_SIGNAL(OPUS_SIGNAL_MUSIC));
 224             opus_custom_encoder_ctl(oe, OPUS_SET_SIGNAL(OPUS_APPLICATION_RESTRICTED_LOWDELAY));
 225             opus_custom_encoder_init(oe, opus_mode, 1);
 226             playback_srcs = jack_slist_append(playback_srcs, oe);
 227 #endif
 228         } else {
 229 #if HAVE_SAMPLERATE
 230             playback_srcs = jack_slist_append (playback_srcs, src_new (SRC_LINEAR, 1, NULL));
 231 #endif
 232         }
 233         playback_ports = jack_slist_append (playback_ports, port);
 234     }
 235
 236     /* Allocate midi playback channels */
 237     for (chn = n_playback_audio; chn < n_playback_midi + n_playback_audio; chn++) {
 238         snprintf (buf, sizeof (buf) - 1, "playback_%u", chn + 1);
 239         port = jack_port_register (client, buf, JACK_DEFAULT_MIDI_TYPE, port_flags, 0);
 240         if (!port) {
 241             printf ("jack_netsource: cannot register %s port\n", buf);
 242             break;
 243         }
 244         playback_ports = jack_slist_append (playback_ports, port);
 245     }
 246 }
 247
 248 /**
 249  * The Sync callback... sync state is set elsewhere...
 250  * we will see if this is working correctly.
 251  * i don't really believe in it yet.
 252  */
 253 int
 254 sync_cb (jack_transport_state_t state, jack_position_t *pos, void *arg)
 255 {
 256     static int latency_count = 0;
 257     int retval = sync_state;
 258
 259     if (! state_connected) {
 260         return 1;
 261     }
 262     if (latency_count) {
 263         latency_count--;
 264         retval = 0;
 265     }
 266
 267     else if (state == JackTransportStarting && last_transport_state != JackTransportStarting) {
 268         retval = 0;
 269         latency_count = latency - 1;
 270     }
 271
 272     last_transport_state = state;
 273     return retval;
 274 }
 275
 276 void
 277 freewheel_cb (int starting, void *arg)
 278 {
 279     freewheeling = starting;
 280 }
 281
 282 int deadline_goodness = 0;
 283 /**
 284  * The process callback for this JACK application.
 285  * It is called by JACK at the appropriate times.
 286  */
 287 int
 288 process (jack_nframes_t nframes, void *arg)
 289 {
 290     jack_nframes_t net_period;
 291     int rx_bufsize, tx_bufsize;
 292
 293     jack_default_audio_sample_t *buf;
 294     jack_port_t *port;
 295     JSList *node;
 296     int chn;
 297     int size, i;
 298     const char *porttype;
 299     int input_fd;
 300
 301     jack_position_t local_trans_pos;
 302
 303     uint32_t *packet_buf_tx, *packet_bufX;
 304     uint32_t *rx_packet_ptr;
 305     jack_time_t packet_recv_timestamp;
 306
 307     if( bitdepth == 1000 || bitdepth == 999)
 308         net_period = (factor * jack_get_buffer_size(client) * 1024 / jack_get_sample_rate(client) / 8) & (~1) ;
 309     else
 310         net_period = (float) nframes / (float) factor;
 311
 312     rx_bufsize =  get_sample_size (bitdepth) * capture_channels * net_period + sizeof (jacknet_packet_header);
 313     tx_bufsize =  get_sample_size (bitdepth) * playback_channels * net_period + sizeof (jacknet_packet_header);
 314
 315     /* Allocate a buffer where both In and Out Buffer will fit */
 316     packet_buf_tx = alloca (tx_bufsize);
 317
 318     jacknet_packet_header *pkthdr_tx = (jacknet_packet_header *) packet_buf_tx;
 319
 320     /*
 321      * for latency==0 we need to send out the packet before we wait on the reply.
 322      * but this introduces a cycle of latency, when netsource is connected to itself.
 323      * so we send out before read only in zero latency mode.
 324      *
 325      */
 326
 327     if( latency == 0 ) {
 328         /* reset packet_bufX... */
 329         packet_bufX = packet_buf_tx + sizeof (jacknet_packet_header) / sizeof (jack_default_audio_sample_t);
 330
 331         /* ---------- Send ---------- */
 332         render_jack_ports_to_payload (bitdepth, playback_ports, playback_srcs, nframes,
 333                                       packet_bufX, net_period, dont_htonl_floats);
 334
 335         /* fill in packet hdr */
 336         pkthdr_tx->transport_state = jack_transport_query (client, &local_trans_pos);
 337         pkthdr_tx->transport_frame = local_trans_pos.frame;
 338         pkthdr_tx->framecnt = framecnt;
 339         pkthdr_tx->latency = latency;
 340         pkthdr_tx->reply_port = reply_port;
 341         pkthdr_tx->sample_rate = jack_get_sample_rate (client);
 342         pkthdr_tx->period_size = nframes;
 343
 344         /* playback for us is capture on the other side */
 345         pkthdr_tx->capture_channels_audio = playback_channels_audio;
 346         pkthdr_tx->playback_channels_audio = capture_channels_audio;
 347         pkthdr_tx->capture_channels_midi = playback_channels_midi;
 348         pkthdr_tx->playback_channels_midi = capture_channels_midi;
 349         pkthdr_tx->mtu = mtu;
 350         if( freewheeling != 0 )
 351             pkthdr_tx->sync_state = (jack_nframes_t)MASTER_FREEWHEELS;
 352         else
 353             pkthdr_tx->sync_state = (jack_nframes_t)deadline_goodness;
 354         //printf("goodness=%d\n", deadline_goodness );
 355
 356         packet_header_hton (pkthdr_tx);
 357         if (cont_miss < 3 * latency + 5) {
 358             int r;
 359             for( r = 0; r < redundancy; r++ )
 360                 netjack_sendto (outsockfd, (char *) packet_buf_tx, tx_bufsize, 0, &destaddr, sizeof (destaddr), mtu);
 361         } else if (cont_miss > 50 + 5 * latency) {
 362             state_connected = 0;
 363             packet_cache_reset_master_address( packcache );
 364             //printf ("Frame %d  \tRealy too many packets missed (%d). Let's reset the counter\n", framecnt, cont_miss);
 365             cont_miss = 0;
 366         }
 367     }
 368
 369     /*
 370      * ok... now the RECEIVE code.
 371      *
 372      */
 373
 374
 375     if( reply_port )
 376         input_fd = insockfd;
 377     else
 378         input_fd = outsockfd;
 379
 380     // for latency == 0 we can poll.
 381     if( (latency == 0) || (freewheeling != 0)  ) {
 382         jack_time_t deadline = jack_get_time() + 1000000 * jack_get_buffer_size(client) / jack_get_sample_rate(client);
 383         // Now loop until we get the right packet.
 384         while(1) {
 385             jack_nframes_t got_frame;
 386             if ( ! netjack_poll_deadline( input_fd, deadline ) )
 387                 break;
 388
 389             packet_cache_drain_socket(packcache, input_fd);
 390
 391             if (packet_cache_get_next_available_framecnt( packcache, framecnt - latency, &got_frame ))
 392                 if( got_frame == (framecnt - latency) )
 393                     break;
 394         }
 395     } else {
 396         // normally:
 397         // only drain socket.
 398         packet_cache_drain_socket(packcache, input_fd);
 399     }
 400
 401     size = packet_cache_retreive_packet_pointer( packcache, framecnt - latency, (char**)&rx_packet_ptr, rx_bufsize, &packet_recv_timestamp );
 402     /* First alternative : we received what we expected. Render the data
 403      * to the JACK ports so it can be played. */
 404     if (size == rx_bufsize) {
 405         uint32_t *packet_buf_rx = rx_packet_ptr;
 406         jacknet_packet_header *pkthdr_rx = (jacknet_packet_header *) packet_buf_rx;
 407         packet_bufX = packet_buf_rx + sizeof (jacknet_packet_header) / sizeof (jack_default_audio_sample_t);
 408         // calculate how much time there would have been, if this packet was sent at the deadline.
 409
 410         int recv_time_offset = (int) (jack_get_time() - packet_recv_timestamp);
 411         packet_header_ntoh (pkthdr_rx);
 412         deadline_goodness = recv_time_offset - (int)pkthdr_rx->latency;
 413         //printf( "deadline goodness = %d ---> off: %d\n", deadline_goodness, recv_time_offset );
 414
 415         if (cont_miss) {
 416             //printf("Frame %d  \tRecovered from dropouts\n", framecnt);
 417             cont_miss = 0;
 418         }
 419         render_payload_to_jack_ports (bitdepth, packet_bufX, net_period,
 420                                       capture_ports, capture_srcs, nframes, dont_htonl_floats);
 421
 422         state_currentframe = framecnt;
 423         state_recv_packet_queue_time = recv_time_offset;
 424         state_connected = 1;
 425         sync_state = pkthdr_rx->sync_state;
 426         packet_cache_release_packet( packcache, framecnt - latency );
 427     }
 428     /* Second alternative : we've received something that's not
 429      * as big as expected or we missed a packet. We render silence
 430      * to the output ports */
 431     else {
 432         jack_nframes_t latency_estimate;
 433         if( packet_cache_find_latency( packcache, framecnt, &latency_estimate ) )
 434             //if( (state_latency == 0) || (latency_estimate < state_latency) )
 435             state_latency = latency_estimate;
 436
 437         // Set the counters up.
 438         state_currentframe = framecnt;
 439         //state_latency = framecnt - pkthdr->framecnt;
 440         state_netxruns += 1;
 441
 442         //printf ("Frame %d  \tPacket missed or incomplete (expected: %d bytes, got: %d bytes)\n", framecnt, rx_bufsize, size);
 443         //printf ("Frame %d  \tPacket missed or incomplete\n", framecnt);
 444         cont_miss += 1;
 445         chn = 0;
 446         node = capture_ports;
 447         while (node != NULL) {
 448             port = (jack_port_t *) node->data;
 449             buf = jack_port_get_buffer (port, nframes);
 450             porttype = jack_port_type (port);
 451             if (strncmp (porttype, JACK_DEFAULT_AUDIO_TYPE, jack_port_type_size ()) == 0)
 452                 for (i = 0; i < nframes; i++)
 453                     buf[i] = 0.0;
 454             else if (strncmp (porttype, JACK_DEFAULT_MIDI_TYPE, jack_port_type_size ()) == 0)
 455                 jack_midi_clear_buffer (buf);
 456             node = jack_slist_next (node);
 457             chn++;
 458         }
 459     }
 460     if (latency != 0) {
 461         /* reset packet_bufX... */
 462         packet_bufX = packet_buf_tx + sizeof (jacknet_packet_header) / sizeof (jack_default_audio_sample_t);
 463
 464         /* ---------- Send ---------- */
 465         render_jack_ports_to_payload (bitdepth, playback_ports, playback_srcs, nframes,
 466                                       packet_bufX, net_period, dont_htonl_floats);
 467
 468         /* fill in packet hdr */
 469         pkthdr_tx->transport_state = jack_transport_query (client, &local_trans_pos);
 470         pkthdr_tx->transport_frame = local_trans_pos.frame;
 471         pkthdr_tx->framecnt = framecnt;
 472         pkthdr_tx->latency = latency;
 473         pkthdr_tx->reply_port = reply_port;
 474         pkthdr_tx->sample_rate = jack_get_sample_rate (client);
 475         pkthdr_tx->period_size = nframes;
 476
 477         /* playback for us is capture on the other side */
 478         pkthdr_tx->capture_channels_audio = playback_channels_audio;
 479         pkthdr_tx->playback_channels_audio = capture_channels_audio;
 480         pkthdr_tx->capture_channels_midi = playback_channels_midi;
 481         pkthdr_tx->playback_channels_midi = capture_channels_midi;
 482         pkthdr_tx->mtu = mtu;
 483         if( freewheeling != 0 )
 484             pkthdr_tx->sync_state = (jack_nframes_t)MASTER_FREEWHEELS;
 485         else
 486             pkthdr_tx->sync_state = (jack_nframes_t)deadline_goodness;
 487         //printf("goodness=%d\n", deadline_goodness );
 488
 489         packet_header_hton (pkthdr_tx);
 490         if (cont_miss < 3 * latency + 5) {
 491             int r;
 492             for( r = 0; r < redundancy; r++ )
 493                 netjack_sendto (outsockfd, (char *) packet_buf_tx, tx_bufsize, 0, &destaddr, sizeof (destaddr), mtu);
 494         } else if (cont_miss > 50 + 5 * latency) {
 495             state_connected = 0;
 496             packet_cache_reset_master_address( packcache );
 497             //printf ("Frame %d  \tRealy too many packets missed (%d). Let's reset the counter\n", framecnt, cont_miss);
 498             cont_miss = 0;
 499         }
 500     }
 501
 502     framecnt++;
 503     return 0;
 504 }
 505
 506 /**
 507  * This is the shutdown callback for this JACK application.
 508  * It is called by JACK if the server ever shuts down or
 509  * decides to disconnect the client.
 510  */
 511
 512 void
 513 jack_shutdown (void *arg)
 514 {
 515     fprintf(stderr, "JACK shut down, exiting ...\n");
 516     exit (1);
 517 }
 518
 519 void
 520 init_sockaddr_in (struct sockaddr_in *name , const char *hostname , uint16_t port)
 521 {
 522     name->sin_family = AF_INET ;
 523     name->sin_port = htons (port);
 524     if (hostname) {
 525         struct hostent *hostinfo = gethostbyname (hostname);
 526         if (hostinfo == NULL) {
 527             fprintf (stderr, "init_sockaddr_in: unknown host: %s.\n", hostname);
 528             fflush( stderr );
 529         }
 530 #ifdef WIN32
 531         name->sin_addr.s_addr = inet_addr( hostname );
 532 #else
 533         name->sin_addr = *(struct in_addr *) hostinfo->h_addr ;
 534 #endif
 535     } else
 536         name->sin_addr.s_addr = htonl (INADDR_ANY) ;
 537
 538 }
 539
 540 void
 541 printUsage ()
 542 {
 543     fprintf (stderr, "usage: jack_netsource [options]\n"
 544              "\n"
 545              "  -h this help text\n"
 546              "  -H <slave host> - Host name of the slave JACK\n"
 547              "  -o <num channels> - Number of audio playback channels\n"
 548              "  -i <num channels> - Number of audio capture channels\n"
 549              "  -O <num channels> - Number of midi playback channels\n"
 550              "  -I <num channels> - Number of midi capture channels\n"
 551              "  -n <periods> - Network latency in JACK periods\n"
 552              "  -p <port> - UDP port that the slave is listening on\n"
 553              "  -r <reply port> - UDP port that we are listening on\n"
 554              "  -B <bind port> - reply port, for use in NAT environments\n"
 555              "  -b <bitdepth> - Set transport to use 16bit or 8bit\n"
 556              "  -c <kbits> - Use CELT encoding with <kbits> kbits per channel\n"
 557              "  -P <kbits> - Use Opus encoding with <kbits> kbits per channel\n"
 558              "  -m <mtu> - Assume this mtu for the link\n"
 559              "  -R <N> - Redundancy: send out packets N times.\n"
 560              "  -e - skip host-to-network endianness conversion\n"
 561              "  -N <jack name> - Reports a different name to jack\n"
 562              "  -s <server name> - The name of the local jack server\n"
 563              "\n");
 564 }
 565
 566 void
 567 sigterm_handler( int signal )
 568 {
 569     quit = 1;
 570 }
 571
 572 int
 573 main (int argc, char *argv[])
 574 {
 575     /* Some startup related basics */
 576     char *client_name, *server_name = NULL, *peer_ip;
 577     int peer_port = 3000;
 578     jack_options_t options = JackNullOption;
 579     jack_status_t status;
 580 #ifdef WIN32
 581     WSADATA wsa;
 582     int rc = WSAStartup(MAKEWORD(2, 0), &wsa);
 583 #endif
 584     /* Torben's famous state variables, aka "the reporting API" ! */
 585     /* heh ? these are only the copies of them ;)                 */
 586     int statecopy_connected, statecopy_latency, statecopy_netxruns;
 587     jack_nframes_t net_period;
 588     /* Argument parsing stuff */
 589     extern char *optarg;
 590     extern int optind, optopt;
 591     int errflg = 0, c;
 592
 593     if (argc < 3) {
 594         printUsage ();
 595         return 1;
 596     }
 597
 598     client_name = (char *) malloc (sizeof (char) * 10);
 599     peer_ip = (char *) malloc (sizeof (char) * 10);
 600     sprintf(client_name, "netjack");
 601     sprintf(peer_ip, "localhost");
 602
 603     while ((c = getopt (argc, argv, ":h:H:o:i:O:I:n:p:r:B:b:c:m:R:e:N:s:P:")) != -1) {
 604         switch (c) {
 605             case 'h':
 606                 printUsage();
 607                 exit (0);
 608                 break;
 609             case 'H':
 610                 free(peer_ip);
 611                 peer_ip = (char *) malloc (sizeof (char) * strlen (optarg) + 1);
 612                 strcpy (peer_ip, optarg);
 613                 break;
 614             case 'o':
 615                 playback_channels_audio = atoi (optarg);
 616                 break;
 617             case 'i':
 618                 capture_channels_audio = atoi (optarg);
 619                 break;
 620             case 'O':
 621                 playback_channels_midi = atoi (optarg);
 622                 break;
 623             case 'I':
 624                 capture_channels_midi = atoi (optarg);
 625                 break;
 626             case 'n':
 627                 latency = atoi (optarg);
 628                 break;
 629             case 'p':
 630                 peer_port = atoi (optarg);
 631                 break;
 632             case 'r':
 633                 reply_port = atoi (optarg);
 634                 break;
 635             case 'B':
 636                 bind_port = atoi (optarg);
 637                 break;
 638             case 'f':
 639                 factor = atoi (optarg);
 640                 printf("This feature is deprecated and will be removed in future netjack versions. CELT offers a superiour way to conserve bandwidth");
 641                 break;
 642             case 'b':
 643                 bitdepth = atoi (optarg);
 644                 break;
 645             case 'c':
 646 #if HAVE_CELT
 647                 bitdepth = 1000;
 648                 factor = atoi (optarg);
 649 #else
 650                 printf( "not built with celt support\n" );
 651                 exit(10);
 652 #endif
 653                 break;
 654             case 'P':
 655 #if HAVE_OPUS
 656                 bitdepth = 999;
 657                 factor = atoi (optarg);
 658 #else
 659                 printf( "not built with opus support\n" );
 660                 exit(10);
 661 #endif
 662                 break;
 663             case 'm':
 664                 mtu = atoi (optarg);
 665                 break;
 666             case 'R':
 667                 redundancy = atoi (optarg);
 668                 break;
 669             case 'e':
 670                 dont_htonl_floats = 1;
 671                 break;
 672             case 'N':
 673                 free(client_name);
 674                 client_name = (char *) malloc (sizeof (char) * strlen (optarg) + 1);
 675                 strcpy (client_name, optarg);
 676                 break;
 677             case 's':
 678                 server_name = (char *) malloc (sizeof (char) * strlen (optarg) + 1);
 679                 strcpy (server_name, optarg);
 680                 options |= JackServerName;
 681                 break;
 682             case ':':
 683                 fprintf (stderr, "Option -%c requires an operand\n", optopt);
 684                 errflg++;
 685                 break;
 686             case '?':
 687                 fprintf (stderr, "Unrecognized option: -%c\n", optopt);
 688                 errflg++;
 689         }
 690     }
 691     if (errflg) {
 692         printUsage ();
 693         exit (2);
 694     }
 695
 696     capture_channels = capture_channels_audio + capture_channels_midi;
 697     playback_channels = playback_channels_audio + playback_channels_midi;
 698
 699     outsockfd = socket (AF_INET, SOCK_DGRAM, 0);
 700     insockfd = socket (AF_INET, SOCK_DGRAM, 0);
 701
 702     if ((outsockfd == -1) || (insockfd == -1)) {
 703         fprintf (stderr, "can not open sockets\n" );
 704         return 1;
 705     }
 706
 707     init_sockaddr_in ((struct sockaddr_in *) &destaddr, peer_ip, peer_port);
 708     if (bind_port) {
 709         init_sockaddr_in ((struct sockaddr_in *) &bindaddr, NULL, bind_port);
 710         if( bind (outsockfd, &bindaddr, sizeof (bindaddr)) ) {
 711             fprintf (stderr, "bind failure\n" );
 712         }
 713     }
 714     if (reply_port) {
 715         init_sockaddr_in ((struct sockaddr_in *) &bindaddr, NULL, reply_port);
 716         if( bind (insockfd, &bindaddr, sizeof (bindaddr)) ) {
 717             fprintf (stderr, "bind failure\n" );
 718         }
 719     }
 720
 721     /* try to become a client of the JACK server */
 722     client = jack_client_open (client_name, options, &status, server_name);
 723     if (client == NULL) {
 724         fprintf (stderr, "jack_client_open() failed, status = 0x%2.0x\n"
 725                  "Is the JACK server running ?\n", status);
 726         return 1;
 727     }
 728
 729     /* Set up jack callbacks */
 730     jack_set_process_callback (client, process, 0);
 731     jack_set_sync_callback (client, sync_cb, 0);
 732     jack_set_freewheel_callback (client, freewheel_cb, 0);
 733     jack_on_shutdown (client, jack_shutdown, 0);
 734
 735     alloc_ports (capture_channels_audio, playback_channels_audio, capture_channels_midi, playback_channels_midi);
 736
 737     if( bitdepth == 1000 || bitdepth == 999)
 738         net_period = (factor * jack_get_buffer_size(client) * 1024 / jack_get_sample_rate(client) / 8) & (~1) ;
 739     else
 740         net_period = ceilf((float) jack_get_buffer_size (client) / (float) factor);
 741
 742     int rx_bufsize =  get_sample_size (bitdepth) * capture_channels * net_period + sizeof (jacknet_packet_header);
 743     packcache = packet_cache_new (latency + 50, rx_bufsize, mtu);
 744
 745     /* tell the JACK server that we are ready to roll */
 746     if (jack_activate (client)) {
 747         fprintf (stderr, "Cannot activate client");
 748         return 1;
 749     }
 750
 751     /* Now sleep forever... and evaluate the state_ vars */
 752
 753     signal( SIGTERM, sigterm_handler );
 754     signal( SIGINT, sigterm_handler );
 755
 756     statecopy_connected = 2; // make it report unconnected on start.
 757     statecopy_latency = state_latency;
 758     statecopy_netxruns = state_netxruns;
 759
 760     while ( !quit ) {
 761 #ifdef WIN32
 762         Sleep (1000);
 763 #else
 764         sleep(1);
 765 #endif
 766         if (statecopy_connected != state_connected) {
 767             statecopy_connected = state_connected;
 768             if (statecopy_connected) {
 769                 state_netxruns = 1; // We want to reset the netxrun count on each new connection
 770                 printf ("Connected :-)\n");
 771             } else
 772                 printf ("Not Connected\n");
 773
 774             fflush(stdout);
 775         }
 776
 777         if (statecopy_connected) {
 778             if (statecopy_netxruns != state_netxruns) {
 779                 statecopy_netxruns = state_netxruns;
 780                 printf ("%s: at frame %06d -> total netxruns %d  (%d%%) queue time= %d\n",
 781                         client_name,
 782                         state_currentframe,
 783                         statecopy_netxruns,
 784                         100 * statecopy_netxruns / state_currentframe,
 785                         state_recv_packet_queue_time);
 786
 787                 fflush(stdout);
 788             }
 789         } else {
 790             if (statecopy_latency != state_latency) {
 791                 statecopy_latency = state_latency;
 792                 if (statecopy_latency > 1)
 793                     printf ("current latency %d\n", statecopy_latency);
 794                 fflush(stdout);
 795             }
 796         }
 797     }
 798
 799     jack_client_close (client);
 800     packet_cache_free (packcache);
 801     exit (0);
 802 }