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
  35 #include <polyp/polypaudio.h>
  36 #include <polyp/mainloop.h>
  37 #include <polyp/mainloop-signal.h>
  38
  39 #if PA_API_VERSION != 8
  40 #error Invalid Polypaudio API version
  41 #endif
  42
  43 static enum { RECORD, PLAYBACK } mode = PLAYBACK;
  44
  45 static pa_context *context = NULL;
  46 static pa_stream *stream = NULL;
  47 static pa_mainloop_api *mainloop_api = NULL;
  48
  49 static void *buffer = NULL;
  50 static size_t buffer_length = 0, buffer_index = 0;
  51
  52 static pa_io_event* stdio_event = NULL;
  53
  54 static char *stream_name = NULL, *client_name = NULL, *device = NULL;
  55
  56 static int verbose = 0;
  57 static pa_volume_t volume = PA_VOLUME_NORM;
  58
  59 static pa_sample_spec sample_spec = {
  60     .format = PA_SAMPLE_S16LE,
  61     .rate = 44100,
  62     .channels = 2
  63 };
  64
  65 /* A shortcut for terminating the application */
  66 static void quit(int ret) {
  67     assert(mainloop_api);
  68     mainloop_api->quit(mainloop_api, ret);
  69 }
  70
  71 /* Write some data to the stream */
  72 static void do_stream_write(size_t length) {
  73     size_t l;
  74     assert(length);
  75
  76     if (!buffer || !buffer_length)
  77         return;
  78
  79     l = length;
  80     if (l > buffer_length)
  81         l = buffer_length;
  82
  83     pa_stream_write(stream, (uint8_t*) buffer + buffer_index, l, NULL, 0, PA_SEEK_RELATIVE);
  84     buffer_length -= l;
  85     buffer_index += l;
  86
  87     if (!buffer_length) {
  88         free(buffer);
  89         buffer = NULL;
  90         buffer_index = buffer_length = 0;
  91     }
  92 }
  93
  94 /* This is called whenever new data may be written to the stream */
  95 static void stream_write_callback(pa_stream *s, size_t length, void *userdata) {
  96     assert(s && length);
  97
  98     if (stdio_event)
  99         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
 100
 101     if (!buffer)
 102         return;
 103
 104     do_stream_write(length);
 105 }
 106
 107 /* This is called whenever new data may is available */
 108 static void stream_read_callback(pa_stream *s, size_t length, void *userdata) {
 109     const void *data;
 110     assert(s && length);
 111
 112     if (stdio_event)
 113         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
 114
 115     pa_stream_peek(s, &data, &length);
 116     assert(data && length);
 117
 118     if (buffer) {
 119         fprintf(stderr, "Buffer overrun, dropping incoming data\n");
 120         pa_stream_drop(s);
 121         return;
 122     }
 123
 124     buffer = malloc(buffer_length = length);
 125     assert(buffer);
 126     memcpy(buffer, data, length);
 127     buffer_index = 0;
 128     pa_stream_drop(s);
 129 }
 130
 131 /* This routine is called whenever the stream state changes */
 132 static void stream_state_callback(pa_stream *s, void *userdata) {
 133     assert(s);
 134
 135     switch (pa_stream_get_state(s)) {
 136         case PA_STREAM_CREATING:
 137         case PA_STREAM_TERMINATED:
 138             break;
 139
 140         case PA_STREAM_READY:
 141             if (verbose)
 142                 fprintf(stderr, "Stream successfully created\n");
 143             break;
 144
 145         case PA_STREAM_FAILED:
 146         default:
 147             fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 148             quit(1);
 149     }
 150 }
 151
 152 /* This is called whenever the context status changes */
 153 static void context_state_callback(pa_context *c, void *userdata) {
 154     assert(c);
 155
 156     switch (pa_context_get_state(c)) {
 157         case PA_CONTEXT_CONNECTING:
 158         case PA_CONTEXT_AUTHORIZING:
 159         case PA_CONTEXT_SETTING_NAME:
 160             break;
 161
 162         case PA_CONTEXT_READY:
 163
 164             assert(c && !stream);
 165
 166             if (verbose)
 167                 fprintf(stderr, "Connection established.\n");
 168
 169             stream = pa_stream_new(c, stream_name, &sample_spec, NULL);
 170             assert(stream);
 171
 172             pa_stream_set_state_callback(stream, stream_state_callback, NULL);
 173             pa_stream_set_write_callback(stream, stream_write_callback, NULL);
 174             pa_stream_set_read_callback(stream, stream_read_callback, NULL);
 175
 176             if (mode == PLAYBACK) {
 177                 pa_cvolume cv;
 178                 pa_stream_connect_playback(stream, device, NULL, 0, pa_cvolume_set(&cv, PA_CHANNELS_MAX, volume), NULL);
 179             } else
 180                 pa_stream_connect_record(stream, device, NULL, 0);
 181
 182             break;
 183
 184         case PA_CONTEXT_TERMINATED:
 185             quit(0);
 186             break;
 187
 188         case PA_CONTEXT_FAILED:
 189         default:
 190             fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
 191             quit(1);
 192     }
 193 }
 194
 195 /* Connection draining complete */
 196 static void context_drain_complete(pa_context*c, void *userdata) {
 197     pa_context_disconnect(c);
 198 }
 199
 200 /* Stream draining complete */
 201 static void stream_drain_complete(pa_stream*s, int success, void *userdata) {
 202     pa_operation *o;
 203
 204     if (!success) {
 205         fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
 206         quit(1);
 207     }
 208
 209     if (verbose)
 210         fprintf(stderr, "Playback stream drained.\n");
 211
 212     pa_stream_disconnect(stream);
 213     pa_stream_unref(stream);
 214     stream = NULL;
 215
 216     if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
 217         pa_context_disconnect(context);
 218     else {
 219         pa_operation_unref(o);
 220
 221         if (verbose)
 222             fprintf(stderr, "Draining connection to server.\n");
 223     }
 224 }
 225
 226 /* New data on STDIN **/
 227 static void stdin_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 228     size_t l, w = 0;
 229     ssize_t r;
 230     assert(a == mainloop_api && e && stdio_event == e);
 231
 232     if (buffer) {
 233         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 234         return;
 235     }
 236
 237     if (!stream || pa_stream_get_state(stream) != PA_STREAM_READY || !(l = w = pa_stream_writable_size(stream)))
 238         l = 4096;
 239
 240     buffer = malloc(l);
 241     assert(buffer);
 242     if ((r = read(fd, buffer, l)) <= 0) {
 243         if (r == 0) {
 244             if (verbose)
 245                 fprintf(stderr, "Got EOF.\n");
 246             pa_operation_unref(pa_stream_drain(stream, stream_drain_complete, NULL));
 247         } else {
 248             fprintf(stderr, "read() failed: %s\n", strerror(errno));
 249             quit(1);
 250         }
 251
 252         mainloop_api->io_free(stdio_event);
 253         stdio_event = NULL;
 254         return;
 255     }
 256
 257     buffer_length = r;
 258     buffer_index = 0;
 259
 260     if (w)
 261         do_stream_write(w);
 262 }
 263
 264 /* Some data may be written to STDOUT */
 265 static void stdout_callback(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 266     ssize_t r;
 267     assert(a == mainloop_api && e && stdio_event == e);
 268
 269     if (!buffer) {
 270         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 271         return;
 272     }
 273
 274     assert(buffer_length);
 275
 276     if ((r = write(fd, (uint8_t*) buffer+buffer_index, buffer_length)) <= 0) {
 277         fprintf(stderr, "write() failed: %s\n", strerror(errno));
 278         quit(1);
 279
 280         mainloop_api->io_free(stdio_event);
 281         stdio_event = NULL;
 282         return;
 283     }
 284
 285     buffer_length -= r;
 286     buffer_index += r;
 287
 288     if (!buffer_length) {
 289         free(buffer);
 290         buffer = NULL;
 291         buffer_length = buffer_index = 0;
 292     }
 293 }
 294
 295 /* UNIX signal to quit recieved */
 296 static void exit_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 297     if (verbose)
 298         fprintf(stderr, "Got signal, exiting.\n");
 299     quit(0);
 300
 301 }
 302
 303 /* Show the current latency */
 304 static void stream_get_latency_callback(pa_stream *s, const pa_latency_info *i, void *userdata) {
 305     pa_usec_t total;
 306     int negative = 0;
 307     assert(s);
 308
 309     if (!i) {
 310         fprintf(stderr, "Failed to get latency: %s\n", pa_strerror(pa_context_errno(context)));
 311         quit(1);
 312         return;
 313     }
 314
 315     total = pa_stream_get_latency(s, i, &negative);
 316
 317     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",
 318             (float) i->buffer_usec, (float) i->sink_usec, (float) i->source_usec, (float) i->transport_usec, (float) total * (negative?-1:1),
 319             i->synchronized_clocks ? "yes" : "no");
 320 }
 321
 322 /* Someone requested that the latency is shown */
 323 static void sigusr1_signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 324     fprintf(stderr, "Got SIGUSR1, requesting latency.\n");
 325     pa_operation_unref(pa_stream_get_latency_info(stream, stream_get_latency_callback, NULL));
 326 }
 327
 328
 329 static void help(const char *argv0) {
 330
 331     printf("%s [options]\n\n"
 332            "  -h, --help                            Show this help\n"
 333            "      --version                         Show version\n\n"
 334            "  -r, --record                          Create a connection for recording\n"
 335            "  -p, --playback                        Create a connection for playback\n\n"
 336            "  -v, --verbose                         Enable verbose operations\n\n"
 337            "  -s, --server=SERVER                   The name of the server to connect to\n"
 338            "  -d, --device=DEVICE                   The name of the sink/source to connect to\n"
 339            "  -n, --client-name=NAME                How to call this client on the server\n"
 340            "      --stream-name=NAME                How to call this stream on the server\n"
 341            "      --volume=VOLUME                   Specify the initial (linear) volume in range 0...256\n"
 342            "      --rate=SAMPLERATE                 The sample rate in Hz (defaults to 44100)\n"
 343            "      --format=SAMPLEFORMAT             The sample type, one of s16le, s16be, u8, float32le,\n"
 344            "                                        float32be, ulaw, alaw (defaults to s16ne)\n"
 345            "      --channels=CHANNELS               The number of channels, 1 for mono, 2 for stereo\n"
 346            "                                        (defaults to 2)\n",
 347            argv0);
 348 }
 349
 350 enum {
 351     ARG_VERSION = 256,
 352     ARG_STREAM_NAME,
 353     ARG_VOLUME,
 354     ARG_SAMPLERATE,
 355     ARG_SAMPLEFORMAT,
 356     ARG_CHANNELS
 357 };
 358
 359 int main(int argc, char *argv[]) {
 360     pa_mainloop* m = NULL;
 361     int ret = 1, r, c;
 362     char *bn, *server = NULL;
 363
 364     static const struct option long_options[] = {
 365         {"record",      0, NULL, 'r'},
 366         {"playback",    0, NULL, 'p'},
 367         {"device",      1, NULL, 'd'},
 368         {"server",      1, NULL, 's'},
 369         {"client-name", 1, NULL, 'n'},
 370         {"stream-name", 1, NULL, ARG_STREAM_NAME},
 371         {"version",     0, NULL, ARG_VERSION},
 372         {"help",        0, NULL, 'h'},
 373         {"verbose",     0, NULL, 'v'},
 374         {"volume",      1, NULL, ARG_VOLUME},
 375         {"rate",        1, NULL, ARG_SAMPLERATE},
 376         {"format",      1, NULL, ARG_SAMPLEFORMAT},
 377         {"channels",    1, NULL, ARG_CHANNELS},
 378         {NULL,          0, NULL, 0}
 379     };
 380
 381     if (!(bn = strrchr(argv[0], '/')))
 382         bn = argv[0];
 383     else
 384         bn++;
 385
 386     if (strstr(bn, "rec") || strstr(bn, "mon"))
 387         mode = RECORD;
 388     else if (strstr(bn, "cat") || strstr(bn, "play"))
 389         mode = PLAYBACK;
 390
 391     while ((c = getopt_long(argc, argv, "rpd:s:n:hv", long_options, NULL)) != -1) {
 392
 393         switch (c) {
 394             case 'h' :
 395                 help(bn);
 396                 ret = 0;
 397                 goto quit;
 398
 399             case ARG_VERSION:
 400                 printf("pacat "PACKAGE_VERSION"\nCompiled with libpolyp %s\nLinked with libpolyp %s\n", pa_get_headers_version(), pa_get_library_version());
 401                 ret = 0;
 402                 goto quit;
 403
 404             case 'r':
 405                 mode = RECORD;
 406                 break;
 407
 408             case 'p':
 409                 mode = PLAYBACK;
 410                 break;
 411
 412             case 'd':
 413                 free(device);
 414                 device = strdup(optarg);
 415                 break;
 416
 417             case 's':
 418                 free(server);
 419                 server = strdup(optarg);
 420                 break;
 421
 422             case 'n':
 423                 free(client_name);
 424                 client_name = strdup(optarg);
 425                 break;
 426
 427             case ARG_STREAM_NAME:
 428                 free(stream_name);
 429                 stream_name = strdup(optarg);
 430                 break;
 431
 432             case 'v':
 433                 verbose = 1;
 434                 break;
 435
 436             case ARG_VOLUME: {
 437                 int v = atoi(optarg);
 438                 volume = v < 0 ? 0 : v;
 439                 break;
 440             }
 441
 442             case ARG_CHANNELS:
 443                 sample_spec.channels = atoi(optarg);
 444                 break;
 445
 446             case ARG_SAMPLEFORMAT:
 447                 sample_spec.format = pa_parse_sample_format(optarg);
 448                 break;
 449
 450             case ARG_SAMPLERATE:
 451                 sample_spec.rate = atoi(optarg);
 452                 break;
 453
 454             default:
 455                 goto quit;
 456         }
 457     }
 458
 459     if (!client_name)
 460         client_name = strdup(bn);
 461
 462     if (!stream_name)
 463         stream_name = strdup(client_name);
 464
 465     if (!pa_sample_spec_valid(&sample_spec)) {
 466         fprintf(stderr, "Invalid sample specification\n");
 467         goto quit;
 468     }
 469
 470     if (verbose) {
 471         char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
 472         pa_sample_spec_snprint(t, sizeof(t), &sample_spec);
 473         fprintf(stderr, "Opening a %s stream with sample specification '%s'.\n", mode == RECORD ? "recording" : "playback", t);
 474     }
 475
 476     /* Set up a new main loop */
 477     if (!(m = pa_mainloop_new())) {
 478         fprintf(stderr, "pa_mainloop_new() failed.\n");
 479         goto quit;
 480     }
 481
 482     mainloop_api = pa_mainloop_get_api(m);
 483
 484     r = pa_signal_init(mainloop_api);
 485     assert(r == 0);
 486     pa_signal_new(SIGINT, exit_signal_callback, NULL);
 487     pa_signal_new(SIGTERM, exit_signal_callback, NULL);
 488 #ifdef SIGUSR1
 489     pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
 490 #endif
 491 #ifdef SIGPIPE
 492     signal(SIGPIPE, SIG_IGN);
 493 #endif
 494
 495     if (!(stdio_event = mainloop_api->io_new(mainloop_api,
 496                                              mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
 497                                              mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
 498                                              mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
 499         fprintf(stderr, "source_io() failed.\n");
 500         goto quit;
 501     }
 502
 503     /* Create a new connection context */
 504     if (!(context = pa_context_new(mainloop_api, client_name))) {
 505         fprintf(stderr, "pa_context_new() failed.\n");
 506         goto quit;
 507     }
 508
 509     pa_context_set_state_callback(context, context_state_callback, NULL);
 510
 511     /* Connect the context */
 512     pa_context_connect(context, server, 1, NULL);
 513
 514     /* Run the main loop */
 515     if (pa_mainloop_run(m, &ret) < 0) {
 516         fprintf(stderr, "pa_mainloop_run() failed.\n");
 517         goto quit;
 518     }
 519
 520 quit:
 521     if (stream)
 522         pa_stream_unref(stream);
 523
 524     if (context)
 525         pa_context_unref(context);
 526
 527     if (stdio_event) {
 528         assert(mainloop_api);
 529         mainloop_api->io_free(stdio_event);
 530     }
 531
 532     if (m) {
 533         pa_signal_done();
 534         pa_mainloop_free(m);
 535     }
 536
 537     free(buffer);
 538
 539     free(server);
 540     free(device);
 541     free(client_name);
 542     free(stream_name);
 543
 544     return ret;
 545 }