code.delx.au - pulseaudio/blob - src/utils/pacat.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <signal.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <unistd.h>
  30 #include <assert.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <getopt.h>
  34 #include <fcntl.h>
  35
  36 #include <pulse/pulseaudio.h>
  37
  38 #define TIME_EVENT_USEC 50000
  39
  40 #if PA_API_VERSION != 9
  41 #error Invalid PulseAudio API version
  42 #endif
  43
  44 static enum { RECORD, PLAYBACK } mode = PLAYBACK;
  45
  46 static pa_context *context = NULL;
  47 static pa_stream *stream = NULL;
  48 static pa_mainloop_api *mainloop_api = NULL;
  49
  50 static void *buffer = NULL;
  51 static size_t buffer_length = 0, buffer_index = 0;
  52
  53 static pa_io_event* stdio_event = NULL;
  54
  55 static char *stream_name = NULL, *client_name = NULL, *device = NULL;
  56
  57 static int verbose = 0;
  58 static pa_volume_t volume = PA_VOLUME_NORM;
  59
  60 static pa_sample_spec sample_spec = {
  61     .format = PA_SAMPLE_S16LE,
  62     .rate = 44100,
  63     .channels = 2
  64 };
  65
  66 static pa_channel_map channel_map;
  67 static int channel_map_set = 0;
  68
  69 /* A shortcut for terminating the application */
  70 static void quit(int ret) {
  71     assert(mainloop_api);
  72     mainloop_api->quit(mainloop_api, ret);
  73 }
  74
  75 /* Write some data to the stream */
  76 static void do_stream_write(size_t length) {
  77     size_t l;
  78     assert(length);
  79
  80     if (!buffer || !buffer_length)
  81         return;
  82
  83     l = length;
  84     if (l > buffer_length)
  85         l = buffer_length;
  86
  87     if (pa_stream_write(stream, (uint8_t*) buffer + buffer_index, l, NULL, 0, PA_SEEK_RELATIVE) < 0) {
  88         fprintf(stderr, "pa_stream_write() failed: %s\n", pa_strerror(pa_context_errno(context)));
  89         quit(1);
  90         return;
  91     }
  92
  93     buffer_length -= l;
  94     buffer_index += l;
  95
  96     if (!buffer_length) {
  97         pa_xfree(buffer);
  98         buffer = NULL;
  99         buffer_index = buffer_length = 0;
 100     }
 101 }
 102
 103 /* This is called whenever new data may be written to the stream */
 104 static void stream_write_callback(pa_stream *s, size_t length, void *userdata) {
 105     assert(s && length);
 106
 107     if (stdio_event)
 108         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
 109
 110     if (!buffer)
 111         return;
 112
 113     do_stream_write(length);
 114 }
 115
 116 /* This is called whenever new data may is available */
 117 static void stream_read_callback(pa_stream *s, size_t length, void *userdata) {
 118     const void *data;
 119     assert(s && length);
 120
 121     if (stdio_event)
 122         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
 123
 124     if (pa_stream_peek(s, &data, &length) < 0) {
 125         fprintf(stderr, "pa_stream_peek() failed: %s\n", pa_strerror(pa_context_errno(context)));
 126         quit(1);
 127         return;
 128     }
 129
 130     assert(data && length);
 131
 132     if (buffer) {
 133         fprintf(stderr, "Buffer overrun, dropping incoming data\n");
 134         if (pa_stream_drop(s) < 0) {
 135             fprintf(stderr, "pa_stream_drop() failed: %s\n", pa_strerror(pa_context_errno(context)));
 136             quit(1);
 137         }
 138         return;
 139     }
 140
 141     buffer = pa_xmalloc(buffer_length = length);
 142     memcpy(buffer, data, length);
 143     buffer_index = 0;
 144     pa_stream_drop(s);
 145 }
 146
 147 /* This routine is called whenever the stream state changes */
 148 static void stream_state_callback(pa_stream *s, void *userdata) {
 149     assert(s);
 150
 151     switch (pa_stream_get_state(s)) {
 152         case PA_STREAM_CREATING:
 153         case PA_STREAM_TERMINATED:
 154             break;
 155
 156         case PA_STREAM_READY:
 157             if (verbose) {
 158                 const pa_buffer_attr *a;
 159
 160                 fprintf(stderr, "Stream successfully created.\n");
 161
 162                 if (!(a = pa_stream_get_buffer_attr(s)))
 163                     fprintf(stderr, "pa_stream_get_buffer_attr() failed: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 164                 else {
 165
 166                     if (mode == PLAYBACK)
 167                         fprintf(stderr, "Buffer metrics: maxlength=%u, tlength=%u, prebuf=%u, minreq=%u\n", a->maxlength, a->tlength, a->prebuf, a->minreq);
 168                     else {
 169                         assert(mode == RECORD);
 170                         fprintf(stderr, "Buffer metrics: maxlength=%u, fragsize=%u\n", a->maxlength, a->fragsize);
 171                     }
 172
 173                 }
 174
 175             }
 176
 177             break;
 178
 179         case PA_STREAM_FAILED:
 180         default:
 181             fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 182             quit(1);
 183     }
 184 }
 185
 186 /* This is called whenever the context status changes */
 187 static void context_state_callback(pa_context *c, void *userdata) {
 188     assert(c);
 189
 190     switch (pa_context_get_state(c)) {
 191         case PA_CONTEXT_CONNECTING:
 192         case PA_CONTEXT_AUTHORIZING:
 193         case PA_CONTEXT_SETTING_NAME:
 194             break;
 195
 196         case PA_CONTEXT_READY: {
 197             int r;
 198
 199             assert(c && !stream);
 200
 201             if (verbose)
 202                 fprintf(stderr, "Connection established.\n");
 203
 204             if (!(stream = pa_stream_new(c, stream_name, &sample_spec, channel_map_set ? &channel_map : NULL))) {
 205                 fprintf(stderr, "pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(c)));
 206                 goto fail;
 207             }
 208
 209             pa_stream_set_state_callback(stream, stream_state_callback, NULL);
 210             pa_stream_set_write_callback(stream, stream_write_callback, NULL);
 211             pa_stream_set_read_callback(stream, stream_read_callback, NULL);
 212
 213             if (mode == PLAYBACK) {
 214                 pa_cvolume cv;
 215                 if ((r = pa_stream_connect_playback(stream, device, NULL, 0, pa_cvolume_set(&cv, sample_spec.channels, volume), NULL)) < 0) {
 216                     fprintf(stderr, "pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(c)));
 217                     goto fail;
 218                 }
 219
 220             } else {
 221                 if ((r = pa_stream_connect_record(stream, device, NULL, 0)) < 0) {
 222                     fprintf(stderr, "pa_stream_connect_record() failed: %s\n", pa_strerror(pa_context_errno(c)));
 223                     goto fail;
 224                 }
 225             }
 226
 227             break;
 228         }
 229
 230         case PA_CONTEXT_TERMINATED:
 231             quit(0);
 232             break;
 233
 234         case PA_CONTEXT_FAILED:
 235         default:
 236             fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
 237             goto fail;
 238     }
 239
 240     return;
 241
 242 fail:
 243     quit(1);
 244
 245 }
 246
 247 /* Connection draining complete */
 248 static void context_drain_complete(pa_context*c, void *userdata) {
 249     pa_context_disconnect(c);
 250 }
 251
 252 /* Stream draining complete */
 253 static void stream_drain_complete(pa_stream*s, int success, void *userdata) {
 254     pa_operation *o;
 255
 256     if (!success) {
 257         fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
 258         quit(1);
 259     }
 260
 261     if (verbose)
 262         fprintf(stderr, "Playback stream drained.\n");
 263
 264     pa_stream_disconnect(stream);
 265     pa_stream_unref(stream);
 266     stream = NULL;
 267
 268     if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
 269         pa_context_disconnect(context);
 270     else {
 271         if (verbose)
 272             fprintf(stderr, "Draining connection to server.\n");
 273     }
 274 }
 275
 276 /* New data on STDIN **/
 277 static void stdin_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 278     size_t l, w = 0;
 279     ssize_t r;
 280     assert(a == mainloop_api && e && stdio_event == e);
 281
 282     if (buffer) {
 283         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 284         return;
 285     }
 286
 287     if (!stream || pa_stream_get_state(stream) != PA_STREAM_READY || !(l = w = pa_stream_writable_size(stream)))
 288         l = 4096;
 289
 290     buffer = pa_xmalloc(l);
 291
 292     if ((r = read(fd, buffer, l)) <= 0) {
 293         if (r == 0) {
 294             pa_operation *o;
 295
 296             if (verbose)
 297                 fprintf(stderr, "Got EOF.\n");
 298
 299             if (!(o = pa_stream_drain(stream, stream_drain_complete, NULL))) {
 300                 fprintf(stderr, "pa_stream_drain(): %s\n", pa_strerror(pa_context_errno(context)));
 301                 quit(1);
 302                 return;
 303             }
 304
 305             pa_operation_unref(o);
 306         } else {
 307             fprintf(stderr, "read() failed: %s\n", strerror(errno));
 308             quit(1);
 309         }
 310
 311         mainloop_api->io_free(stdio_event);
 312         stdio_event = NULL;
 313         return;
 314     }
 315
 316     buffer_length = r;
 317     buffer_index = 0;
 318
 319     if (w)
 320         do_stream_write(w);
 321 }
 322
 323 /* Some data may be written to STDOUT */
 324 static void stdout_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 325     ssize_t r;
 326     assert(a == mainloop_api && e && stdio_event == e);
 327
 328     if (!buffer) {
 329         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 330         return;
 331     }
 332
 333     assert(buffer_length);
 334
 335     if ((r = write(fd, (uint8_t*) buffer+buffer_index, buffer_length)) <= 0) {
 336         fprintf(stderr, "write() failed: %s\n", strerror(errno));
 337         quit(1);
 338
 339         mainloop_api->io_free(stdio_event);
 340         stdio_event = NULL;
 341         return;
 342     }
 343
 344     buffer_length -= r;
 345     buffer_index += r;
 346
 347     if (!buffer_length) {
 348         pa_xfree(buffer);
 349         buffer = NULL;
 350         buffer_length = buffer_index = 0;
 351     }
 352 }
 353
 354 /* UNIX signal to quit recieved */
 355 static void exit_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 356     if (verbose)
 357         fprintf(stderr, "Got signal, exiting.\n");
 358     quit(0);
 359 }
 360
 361 /* Show the current latency */
 362 static void stream_update_timing_callback(pa_stream *s, int success, void *userdata) {
 363     pa_usec_t latency, usec;
 364     int negative = 0;
 365
 366     assert(s);
 367
 368     if (!success ||
 369         pa_stream_get_time(s, &usec) < 0 ||
 370         pa_stream_get_latency(s, &latency, &negative) < 0) {
 371         fprintf(stderr, "Failed to get latency: %s\n", pa_strerror(pa_context_errno(context)));
 372         quit(1);
 373         return;
 374     }
 375
 376     fprintf(stderr, "Time: %0.3f sec; Latency: %0.0f usec.  \r",
 377             (float) usec / 1000000,
 378             (float) latency * (negative?-1:1));
 379 }
 380
 381 /* Someone requested that the latency is shown */
 382 static void sigusr1_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 383
 384     if (!stream)
 385         return;
 386
 387     pa_operation_unref(pa_stream_update_timing_info(stream, stream_update_timing_callback, NULL));
 388 }
 389
 390 static void time_event_callback(pa_mainloop_api*m, pa_time_event *e, const struct timeval *tv, void *userdata) {
 391     struct timeval next;
 392
 393     if (stream && pa_stream_get_state(stream) == PA_STREAM_READY) {
 394         pa_operation *o;
 395         if (!(o = pa_stream_update_timing_info(stream, stream_update_timing_callback, NULL)))
 396             fprintf(stderr, "pa_stream_update_timing_info() failed: %s\n", pa_strerror(pa_context_errno(context)));
 397         else
 398             pa_operation_unref(o);
 399     }
 400
 401     pa_gettimeofday(&next);
 402     pa_timeval_add(&next, TIME_EVENT_USEC);
 403
 404     m->time_restart(e, &next);
 405 }
 406
 407 static void help(const char *argv0) {
 408
 409     printf("%s [options]\n\n"
 410            "  -h, --help                            Show this help\n"
 411            "      --version                         Show version\n\n"
 412            "  -r, --record                          Create a connection for recording\n"
 413            "  -p, --playback                        Create a connection for playback\n\n"
 414            "  -v, --verbose                         Enable verbose operations\n\n"
 415            "  -s, --server=SERVER                   The name of the server to connect to\n"
 416            "  -d, --device=DEVICE                   The name of the sink/source to connect to\n"
 417            "  -n, --client-name=NAME                How to call this client on the server\n"
 418            "      --stream-name=NAME                How to call this stream on the server\n"
 419            "      --volume=VOLUME                   Specify the initial (linear) volume in range 0...65536\n"
 420            "      --rate=SAMPLERATE                 The sample rate in Hz (defaults to 44100)\n"
 421            "      --format=SAMPLEFORMAT             The sample type, one of s16le, s16be, u8, float32le,\n"
 422            "                                        float32be, ulaw, alaw (defaults to s16ne)\n"
 423            "      --channels=CHANNELS               The number of channels, 1 for mono, 2 for stereo\n"
 424            "                                        (defaults to 2)\n"
 425            "      --channel-map=CHANNELMAP          Channel map to use instead of the default\n",
 426            argv0);
 427 }
 428
 429 enum {
 430     ARG_VERSION = 256,
 431     ARG_STREAM_NAME,
 432     ARG_VOLUME,
 433     ARG_SAMPLERATE,
 434     ARG_SAMPLEFORMAT,
 435     ARG_CHANNELS,
 436     ARG_CHANNELMAP,
 437 };
 438
 439 int main(int argc, char *argv[]) {
 440     pa_mainloop* m = NULL;
 441     int ret = 1, r, c;
 442     char *bn, *server = NULL;
 443     pa_time_event *time_event = NULL;
 444
 445     static const struct option long_options[] = {
 446         {"record",      0, NULL, 'r'},
 447         {"playback",    0, NULL, 'p'},
 448         {"device",      1, NULL, 'd'},
 449         {"server",      1, NULL, 's'},
 450         {"client-name", 1, NULL, 'n'},
 451         {"stream-name", 1, NULL, ARG_STREAM_NAME},
 452         {"version",     0, NULL, ARG_VERSION},
 453         {"help",        0, NULL, 'h'},
 454         {"verbose",     0, NULL, 'v'},
 455         {"volume",      1, NULL, ARG_VOLUME},
 456         {"rate",        1, NULL, ARG_SAMPLERATE},
 457         {"format",      1, NULL, ARG_SAMPLEFORMAT},
 458         {"channels",    1, NULL, ARG_CHANNELS},
 459         {"channel-map", 1, NULL, ARG_CHANNELMAP},
 460         {NULL,          0, NULL, 0}
 461     };
 462
 463     if (!(bn = strrchr(argv[0], '/')))
 464         bn = argv[0];
 465     else
 466         bn++;
 467
 468     if (strstr(bn, "rec") || strstr(bn, "mon"))
 469         mode = RECORD;
 470     else if (strstr(bn, "cat") || strstr(bn, "play"))
 471         mode = PLAYBACK;
 472
 473     while ((c = getopt_long(argc, argv, "rpd:s:n:hv", long_options, NULL)) != -1) {
 474
 475         switch (c) {
 476             case 'h' :
 477                 help(bn);
 478                 ret = 0;
 479                 goto quit;
 480
 481             case ARG_VERSION:
 482                 printf("pacat "PACKAGE_VERSION"\nCompiled with libpulse %s\nLinked with libpulse %s\n", pa_get_headers_version(), pa_get_library_version());
 483                 ret = 0;
 484                 goto quit;
 485
 486             case 'r':
 487                 mode = RECORD;
 488                 break;
 489
 490             case 'p':
 491                 mode = PLAYBACK;
 492                 break;
 493
 494             case 'd':
 495                 pa_xfree(device);
 496                 device = pa_xstrdup(optarg);
 497                 break;
 498
 499             case 's':
 500                 pa_xfree(server);
 501                 server = pa_xstrdup(optarg);
 502                 break;
 503
 504             case 'n':
 505                 pa_xfree(client_name);
 506                 client_name = pa_xstrdup(optarg);
 507                 break;
 508
 509             case ARG_STREAM_NAME:
 510                 pa_xfree(stream_name);
 511                 stream_name = pa_xstrdup(optarg);
 512                 break;
 513
 514             case 'v':
 515                 verbose = 1;
 516                 break;
 517
 518             case ARG_VOLUME: {
 519                 int v = atoi(optarg);
 520                 volume = v < 0 ? 0 : v;
 521                 break;
 522             }
 523
 524             case ARG_CHANNELS:
 525                 sample_spec.channels = atoi(optarg);
 526                 break;
 527
 528             case ARG_SAMPLEFORMAT:
 529                 sample_spec.format = pa_parse_sample_format(optarg);
 530                 break;
 531
 532             case ARG_SAMPLERATE:
 533                 sample_spec.rate = atoi(optarg);
 534                 break;
 535
 536             case ARG_CHANNELMAP:
 537                 if (!pa_channel_map_parse(&channel_map, optarg)) {
 538                     fprintf(stderr, "Invalid channel map\n");
 539                     goto quit;
 540                 }
 541
 542                 channel_map_set = 1;
 543                 break;
 544
 545             default:
 546                 goto quit;
 547         }
 548     }
 549
 550     if (!pa_sample_spec_valid(&sample_spec)) {
 551         fprintf(stderr, "Invalid sample specification\n");
 552         goto quit;
 553     }
 554
 555     if (channel_map_set && channel_map.channels != sample_spec.channels) {
 556         fprintf(stderr, "Channel map doesn't match sample specification\n");
 557         goto quit;
 558     }
 559
 560     if (verbose) {
 561         char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
 562         pa_sample_spec_snprint(t, sizeof(t), &sample_spec);
 563         fprintf(stderr, "Opening a %s stream with sample specification '%s'.\n", mode == RECORD ? "recording" : "playback", t);
 564     }
 565
 566     if (!(optind >= argc)) {
 567         if (optind+1 == argc) {
 568             int fd;
 569
 570             if ((fd = open(argv[optind], mode == PLAYBACK ? O_RDONLY : O_WRONLY|O_TRUNC|O_CREAT, 0666)) < 0) {
 571                 fprintf(stderr, "open(): %s\n", strerror(errno));
 572                 goto quit;
 573             }
 574
 575             if (dup2(fd, mode == PLAYBACK ? 0 : 1) < 0) {
 576                 fprintf(stderr, "dup2(): %s\n", strerror(errno));
 577                 goto quit;
 578             }
 579
 580             close(fd);
 581
 582             if (!stream_name)
 583                 stream_name = pa_xstrdup(argv[optind]);
 584
 585         } else {
 586             fprintf(stderr, "Too many arguments.\n");
 587             goto quit;
 588         }
 589     }
 590
 591     if (!client_name)
 592         client_name = pa_xstrdup(bn);
 593
 594     if (!stream_name)
 595         stream_name = pa_xstrdup(client_name);
 596
 597     /* Set up a new main loop */
 598     if (!(m = pa_mainloop_new())) {
 599         fprintf(stderr, "pa_mainloop_new() failed.\n");
 600         goto quit;
 601     }
 602
 603     mainloop_api = pa_mainloop_get_api(m);
 604
 605     r = pa_signal_init(mainloop_api);
 606     assert(r == 0);
 607     pa_signal_new(SIGINT, exit_signal_callback, NULL);
 608     pa_signal_new(SIGTERM, exit_signal_callback, NULL);
 609 #ifdef SIGUSR1
 610     pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
 611 #endif
 612 #ifdef SIGPIPE
 613     signal(SIGPIPE, SIG_IGN);
 614 #endif
 615
 616     if (!(stdio_event = mainloop_api->io_new(mainloop_api,
 617                                              mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
 618                                              mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
 619                                              mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
 620         fprintf(stderr, "io_new() failed.\n");
 621         goto quit;
 622     }
 623
 624     /* Create a new connection context */
 625     if (!(context = pa_context_new(mainloop_api, client_name))) {
 626         fprintf(stderr, "pa_context_new() failed.\n");
 627         goto quit;
 628     }
 629
 630     pa_context_set_state_callback(context, context_state_callback, NULL);
 631
 632     /* Connect the context */
 633     pa_context_connect(context, server, 0, NULL);
 634
 635     if (verbose) {
 636         struct timeval tv;
 637
 638         pa_gettimeofday(&tv);
 639         pa_timeval_add(&tv, TIME_EVENT_USEC);
 640
 641         if (!(time_event = mainloop_api->time_new(mainloop_api, &tv, time_event_callback, NULL))) {
 642             fprintf(stderr, "time_new() failed.\n");
 643             goto quit;
 644         }
 645     }
 646
 647     /* Run the main loop */
 648     if (pa_mainloop_run(m, &ret) < 0) {
 649         fprintf(stderr, "pa_mainloop_run() failed.\n");
 650         goto quit;
 651     }
 652
 653 quit:
 654     if (stream)
 655         pa_stream_unref(stream);
 656
 657     if (context)
 658         pa_context_unref(context);
 659
 660     if (stdio_event) {
 661         assert(mainloop_api);
 662         mainloop_api->io_free(stdio_event);
 663     }
 664
 665     if (time_event) {
 666         assert(mainloop_api);
 667         mainloop_api->time_free(time_event);
 668     }
 669
 670     if (m) {
 671         pa_signal_done();
 672         pa_mainloop_free(m);
 673     }
 674
 675     pa_xfree(buffer);
 676
 677     pa_xfree(server);
 678     pa_xfree(device);
 679     pa_xfree(client_name);
 680     pa_xfree(stream_name);
 681
 682     return ret;
 683 }