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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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   polypaudio 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 polypaudio; 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 <polyp/polypaudio.h>
  37 #include <polyp/mainloop.h>
  38 #include <polyp/mainloop-signal.h>
  39
  40 #if PA_API_VERSION != 8
  41 #error Invalid Polypaudio 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 /* A shortcut for terminating the application */
  67 static void quit(int ret) {
  68     assert(mainloop_api);
  69     mainloop_api->quit(mainloop_api, ret);
  70 }
  71
  72 /* Write some data to the stream */
  73 static void do_stream_write(size_t length) {
  74     size_t l;
  75     assert(length);
  76
  77     if (!buffer || !buffer_length)
  78         return;
  79
  80     l = length;
  81     if (l > buffer_length)
  82         l = buffer_length;
  83
  84     if (pa_stream_write(stream, (uint8_t*) buffer + buffer_index, l, NULL, 0, PA_SEEK_RELATIVE) < 0) {
  85         fprintf(stderr, "pa_stream_write() failed: %s\n", pa_strerror(pa_context_errno(context)));
  86         quit(1);
  87         return;
  88     }
  89
  90     buffer_length -= l;
  91     buffer_index += l;
  92
  93     if (!buffer_length) {
  94         free(buffer);
  95         buffer = NULL;
  96         buffer_index = buffer_length = 0;
  97     }
  98 }
  99
 100 /* This is called whenever new data may be written to the stream */
 101 static void stream_write_callback(pa_stream *s, size_t length, void *userdata) {
 102     assert(s && length);
 103
 104     if (stdio_event)
 105         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
 106
 107     if (!buffer)
 108         return;
 109
 110     do_stream_write(length);
 111 }
 112
 113 /* This is called whenever new data may is available */
 114 static void stream_read_callback(pa_stream *s, size_t length, void *userdata) {
 115     const void *data;
 116     assert(s && length);
 117
 118     if (stdio_event)
 119         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
 120
 121     if (pa_stream_peek(s, &data, &length) < 0) {
 122         fprintf(stderr, "pa_stream_peek() failed: %s\n", pa_strerror(pa_context_errno(context)));
 123         quit(1);
 124         return;
 125     }
 126
 127     assert(data && length);
 128
 129     if (buffer) {
 130         fprintf(stderr, "Buffer overrun, dropping incoming data\n");
 131         if (pa_stream_drop(s) < 0) {
 132             fprintf(stderr, "pa_stream_drop() failed: %s\n", pa_strerror(pa_context_errno(context)));
 133             quit(1);
 134         }
 135         return;
 136     }
 137
 138     buffer = malloc(buffer_length = length);
 139     assert(buffer);
 140     memcpy(buffer, data, length);
 141     buffer_index = 0;
 142     pa_stream_drop(s);
 143 }
 144
 145 /* This routine is called whenever the stream state changes */
 146 static void stream_state_callback(pa_stream *s, void *userdata) {
 147     assert(s);
 148
 149     switch (pa_stream_get_state(s)) {
 150         case PA_STREAM_CREATING:
 151         case PA_STREAM_TERMINATED:
 152             break;
 153
 154         case PA_STREAM_READY:
 155             if (verbose)
 156                 fprintf(stderr, "Stream successfully created\n");
 157             break;
 158
 159         case PA_STREAM_FAILED:
 160         default:
 161             fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 162             quit(1);
 163     }
 164 }
 165
 166 /* This is called whenever the context status changes */
 167 static void context_state_callback(pa_context *c, void *userdata) {
 168     assert(c);
 169
 170     switch (pa_context_get_state(c)) {
 171         case PA_CONTEXT_CONNECTING:
 172         case PA_CONTEXT_AUTHORIZING:
 173         case PA_CONTEXT_SETTING_NAME:
 174             break;
 175
 176         case PA_CONTEXT_READY: {
 177             int r;
 178
 179             assert(c && !stream);
 180
 181             if (verbose)
 182                 fprintf(stderr, "Connection established.\n");
 183
 184             if (!(stream = pa_stream_new(c, stream_name, &sample_spec, NULL))) {
 185                 fprintf(stderr, "pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(c)));
 186                 goto fail;
 187             }
 188
 189             pa_stream_set_state_callback(stream, stream_state_callback, NULL);
 190             pa_stream_set_write_callback(stream, stream_write_callback, NULL);
 191             pa_stream_set_read_callback(stream, stream_read_callback, NULL);
 192
 193             if (mode == PLAYBACK) {
 194                 pa_cvolume cv;
 195                 if ((r = pa_stream_connect_playback(stream, device, NULL, 0, pa_cvolume_set(&cv, sample_spec.channels, volume), NULL)) < 0) {
 196                     fprintf(stderr, "pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(c)));
 197                     goto fail;
 198                 }
 199
 200             } else {
 201                 if ((r = pa_stream_connect_record(stream, device, NULL, 0)) < 0) {
 202                     fprintf(stderr, "pa_stream_connect_record() failed: %s\n", pa_strerror(pa_context_errno(c)));
 203                     goto fail;
 204                 }
 205             }
 206
 207             break;
 208         }
 209
 210         case PA_CONTEXT_TERMINATED:
 211             quit(0);
 212             break;
 213
 214         case PA_CONTEXT_FAILED:
 215         default:
 216             fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
 217             goto fail;
 218     }
 219
 220     return;
 221
 222 fail:
 223     quit(1);
 224
 225 }
 226
 227 /* Connection draining complete */
 228 static void context_drain_complete(pa_context*c, void *userdata) {
 229     pa_context_disconnect(c);
 230 }
 231
 232 /* Stream draining complete */
 233 static void stream_drain_complete(pa_stream*s, int success, void *userdata) {
 234     pa_operation *o;
 235
 236     if (!success) {
 237         fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
 238         quit(1);
 239     }
 240
 241     if (verbose)
 242         fprintf(stderr, "Playback stream drained.\n");
 243
 244     pa_stream_disconnect(stream);
 245     pa_stream_unref(stream);
 246     stream = NULL;
 247
 248     if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
 249         pa_context_disconnect(context);
 250     else {
 251         if (verbose)
 252             fprintf(stderr, "Draining connection to server.\n");
 253     }
 254 }
 255
 256 /* New data on STDIN **/
 257 static void stdin_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 258     size_t l, w = 0;
 259     ssize_t r;
 260     assert(a == mainloop_api && e && stdio_event == e);
 261
 262     if (buffer) {
 263         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 264         return;
 265     }
 266
 267     if (!stream || pa_stream_get_state(stream) != PA_STREAM_READY || !(l = w = pa_stream_writable_size(stream)))
 268         l = 4096;
 269
 270     buffer = malloc(l);
 271     assert(buffer);
 272     if ((r = read(fd, buffer, l)) <= 0) {
 273         if (r == 0) {
 274             pa_operation *o;
 275
 276             if (verbose)
 277                 fprintf(stderr, "Got EOF.\n");
 278
 279             if (!(o = pa_stream_drain(stream, stream_drain_complete, NULL))) {
 280                 fprintf(stderr, "pa_stream_drain(): %s\n", pa_strerror(pa_context_errno(context)));
 281                 quit(1);
 282                 return;
 283             }
 284
 285             pa_operation_unref(o);
 286         } else {
 287             fprintf(stderr, "read() failed: %s\n", strerror(errno));
 288             quit(1);
 289         }
 290
 291         mainloop_api->io_free(stdio_event);
 292         stdio_event = NULL;
 293         return;
 294     }
 295
 296     buffer_length = r;
 297     buffer_index = 0;
 298
 299     if (w)
 300         do_stream_write(w);
 301 }
 302
 303 /* Some data may be written to STDOUT */
 304 static void stdout_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 305     ssize_t r;
 306     assert(a == mainloop_api && e && stdio_event == e);
 307
 308     if (!buffer) {
 309         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 310         return;
 311     }
 312
 313     assert(buffer_length);
 314
 315     if ((r = write(fd, (uint8_t*) buffer+buffer_index, buffer_length)) <= 0) {
 316         fprintf(stderr, "write() failed: %s\n", strerror(errno));
 317         quit(1);
 318
 319         mainloop_api->io_free(stdio_event);
 320         stdio_event = NULL;
 321         return;
 322     }
 323
 324     buffer_length -= r;
 325     buffer_index += r;
 326
 327     if (!buffer_length) {
 328         free(buffer);
 329         buffer = NULL;
 330         buffer_length = buffer_index = 0;
 331     }
 332 }
 333
 334 /* UNIX signal to quit recieved */
 335 static void exit_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 336     if (verbose)
 337         fprintf(stderr, "Got signal, exiting.\n");
 338     quit(0);
 339
 340 }
 341
 342 /* Show the current latency */
 343 static void stream_update_timing_callback(pa_stream *s, int success, void *userdata) {
 344     pa_usec_t total;
 345     int negative = 0;
 346     const pa_timing_info *i;
 347
 348     assert(s);
 349
 350     if (!success ||
 351         !(i = pa_stream_get_timing_info(s)) ||
 352         pa_stream_get_latency(s, &total, &negative) < 0) {
 353         fprintf(stderr, "Failed to get latency: %s\n", pa_strerror(pa_context_errno(context)));
 354         quit(1);
 355         return;
 356     }
 357
 358     fprintf(stderr, "Latency: buffer: %0.0f usec; sink: %0.0f usec; source: %0.0f usec; transport: %0.0f usec; total: %0.0f usec; synchronized clocks: %s.\n",
 359             (float) i->buffer_usec,
 360             (float) i->sink_usec,
 361             (float) i->source_usec,
 362             (float) i->transport_usec,
 363             (float) total * (negative?-1:1),
 364             i->synchronized_clocks ? "yes" : "no");
 365 }
 366
 367 /* Someone requested that the latency is shown */
 368 static void sigusr1_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 369     pa_operation_unref(pa_stream_update_timing_info(stream, stream_update_timing_callback, NULL));
 370 }
 371
 372
 373 static void help(const char *argv0) {
 374
 375     printf("%s [options]\n\n"
 376            "  -h, --help                            Show this help\n"
 377            "      --version                         Show version\n\n"
 378            "  -r, --record                          Create a connection for recording\n"
 379            "  -p, --playback                        Create a connection for playback\n\n"
 380            "  -v, --verbose                         Enable verbose operations\n\n"
 381            "  -s, --server=SERVER                   The name of the server to connect to\n"
 382            "  -d, --device=DEVICE                   The name of the sink/source to connect to\n"
 383            "  -n, --client-name=NAME                How to call this client on the server\n"
 384            "      --stream-name=NAME                How to call this stream on the server\n"
 385            "      --volume=VOLUME                   Specify the initial (linear) volume in range 0...256\n"
 386            "      --rate=SAMPLERATE                 The sample rate in Hz (defaults to 44100)\n"
 387            "      --format=SAMPLEFORMAT             The sample type, one of s16le, s16be, u8, float32le,\n"
 388            "                                        float32be, ulaw, alaw (defaults to s16ne)\n"
 389            "      --channels=CHANNELS               The number of channels, 1 for mono, 2 for stereo\n"
 390            "                                        (defaults to 2)\n",
 391            argv0);
 392 }
 393
 394 enum {
 395     ARG_VERSION = 256,
 396     ARG_STREAM_NAME,
 397     ARG_VOLUME,
 398     ARG_SAMPLERATE,
 399     ARG_SAMPLEFORMAT,
 400     ARG_CHANNELS
 401 };
 402
 403 int main(int argc, char *argv[]) {
 404     pa_mainloop* m = NULL;
 405     int ret = 1, r, c;
 406     char *bn, *server = NULL;
 407
 408     static const struct option long_options[] = {
 409         {"record",      0, NULL, 'r'},
 410         {"playback",    0, NULL, 'p'},
 411         {"device",      1, NULL, 'd'},
 412         {"server",      1, NULL, 's'},
 413         {"client-name", 1, NULL, 'n'},
 414         {"stream-name", 1, NULL, ARG_STREAM_NAME},
 415         {"version",     0, NULL, ARG_VERSION},
 416         {"help",        0, NULL, 'h'},
 417         {"verbose",     0, NULL, 'v'},
 418         {"volume",      1, NULL, ARG_VOLUME},
 419         {"rate",        1, NULL, ARG_SAMPLERATE},
 420         {"format",      1, NULL, ARG_SAMPLEFORMAT},
 421         {"channels",    1, NULL, ARG_CHANNELS},
 422         {NULL,          0, NULL, 0}
 423     };
 424
 425     if (!(bn = strrchr(argv[0], '/')))
 426         bn = argv[0];
 427     else
 428         bn++;
 429
 430     if (strstr(bn, "rec") || strstr(bn, "mon"))
 431         mode = RECORD;
 432     else if (strstr(bn, "cat") || strstr(bn, "play"))
 433         mode = PLAYBACK;
 434
 435     while ((c = getopt_long(argc, argv, "rpd:s:n:hv", long_options, NULL)) != -1) {
 436
 437         switch (c) {
 438             case 'h' :
 439                 help(bn);
 440                 ret = 0;
 441                 goto quit;
 442
 443             case ARG_VERSION:
 444                 printf("pacat "PACKAGE_VERSION"\nCompiled with libpolyp %s\nLinked with libpolyp %s\n", pa_get_headers_version(), pa_get_library_version());
 445                 ret = 0;
 446                 goto quit;
 447
 448             case 'r':
 449                 mode = RECORD;
 450                 break;
 451
 452             case 'p':
 453                 mode = PLAYBACK;
 454                 break;
 455
 456             case 'd':
 457                 free(device);
 458                 device = strdup(optarg);
 459                 break;
 460
 461             case 's':
 462                 free(server);
 463                 server = strdup(optarg);
 464                 break;
 465
 466             case 'n':
 467                 free(client_name);
 468                 client_name = strdup(optarg);
 469                 break;
 470
 471             case ARG_STREAM_NAME:
 472                 free(stream_name);
 473                 stream_name = strdup(optarg);
 474                 break;
 475
 476             case 'v':
 477                 verbose = 1;
 478                 break;
 479
 480             case ARG_VOLUME: {
 481                 int v = atoi(optarg);
 482                 volume = v < 0 ? 0 : v;
 483                 break;
 484             }
 485
 486             case ARG_CHANNELS:
 487                 sample_spec.channels = atoi(optarg);
 488                 break;
 489
 490             case ARG_SAMPLEFORMAT:
 491                 sample_spec.format = pa_parse_sample_format(optarg);
 492                 break;
 493
 494             case ARG_SAMPLERATE:
 495                 sample_spec.rate = atoi(optarg);
 496                 break;
 497
 498             default:
 499                 goto quit;
 500         }
 501     }
 502
 503     if (!client_name)
 504         client_name = strdup(bn);
 505
 506     if (!stream_name)
 507         stream_name = strdup(client_name);
 508
 509     if (!pa_sample_spec_valid(&sample_spec)) {
 510         fprintf(stderr, "Invalid sample specification\n");
 511         goto quit;
 512     }
 513
 514     if (verbose) {
 515         char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
 516         pa_sample_spec_snprint(t, sizeof(t), &sample_spec);
 517         fprintf(stderr, "Opening a %s stream with sample specification '%s'.\n", mode == RECORD ? "recording" : "playback", t);
 518     }
 519
 520     if (optind+1 < argc) {
 521         fprintf(stderr, "Too many arguments.\n");
 522         goto quit;
 523     }
 524
 525     if (optind+1 == argc) {
 526         int fd;
 527
 528         if ((fd = open(argv[optind], O_RDONLY)) < 0) {
 529             fprintf(stderr, "open(): %s\n", strerror(errno));
 530             goto quit;
 531         }
 532
 533         if (dup2(fd, 0) < 0) {
 534             fprintf(stderr, "dup2(): %s\n", strerror(errno));
 535             goto quit;
 536         }
 537
 538         close(fd);
 539     }
 540
 541     /* Set up a new main loop */
 542     if (!(m = pa_mainloop_new())) {
 543         fprintf(stderr, "pa_mainloop_new() failed.\n");
 544         goto quit;
 545     }
 546
 547     mainloop_api = pa_mainloop_get_api(m);
 548
 549     r = pa_signal_init(mainloop_api);
 550     assert(r == 0);
 551     pa_signal_new(SIGINT, exit_signal_callback, NULL);
 552     pa_signal_new(SIGTERM, exit_signal_callback, NULL);
 553 #ifdef SIGUSR1
 554     pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
 555 #endif
 556 #ifdef SIGPIPE
 557     signal(SIGPIPE, SIG_IGN);
 558 #endif
 559
 560     if (!(stdio_event = mainloop_api->io_new(mainloop_api,
 561                                              mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
 562                                              mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
 563                                              mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
 564         fprintf(stderr, "source_io() failed.\n");
 565         goto quit;
 566     }
 567
 568     /* Create a new connection context */
 569     if (!(context = pa_context_new(mainloop_api, client_name))) {
 570         fprintf(stderr, "pa_context_new() failed.\n");
 571         goto quit;
 572     }
 573
 574     pa_context_set_state_callback(context, context_state_callback, NULL);
 575
 576     /* Connect the context */
 577     pa_context_connect(context, server, 0, NULL);
 578
 579     /* Run the main loop */
 580     if (pa_mainloop_run(m, &ret) < 0) {
 581         fprintf(stderr, "pa_mainloop_run() failed.\n");
 582         goto quit;
 583     }
 584
 585 quit:
 586     if (stream)
 587         pa_stream_unref(stream);
 588
 589     if (context)
 590         pa_context_unref(context);
 591
 592     if (stdio_event) {
 593         assert(mainloop_api);
 594         mainloop_api->io_free(stdio_event);
 595     }
 596
 597     if (m) {
 598         pa_signal_done();
 599         pa_mainloop_free(m);
 600     }
 601
 602     free(buffer);
 603
 604     free(server);
 605     free(device);
 606     free(client_name);
 607     free(stream_name);
 608
 609     return ret;
 610 }