code.delx.au - pulseaudio/blob - polyp/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/polyplib.h>
  36 #include <polyp/polyplib-error.h>
  37 #include <polyp/mainloop.h>
  38 #include <polyp/mainloop-signal.h>
  39 #include <polyp/polyplib-version.h>
  40
  41 #if PA_API_VERSION != 6
  42 #error Invalid Polypaudio API version
  43 #endif
  44
  45 static enum { RECORD, PLAYBACK } mode = PLAYBACK;
  46
  47 static struct pa_context *context = NULL;
  48 static struct pa_stream *stream = NULL;
  49 static struct pa_mainloop_api *mainloop_api = NULL;
  50
  51 static void *buffer = NULL;
  52 static size_t buffer_length = 0, buffer_index = 0;
  53
  54 static struct pa_io_event* stdio_event = NULL;
  55
  56 static char *stream_name = NULL, *client_name = NULL, *device = NULL;
  57
  58 static int verbose = 0;
  59 static pa_volume_t volume = PA_VOLUME_NORM;
  60
  61 static struct pa_sample_spec sample_spec = {
  62     .format = PA_SAMPLE_S16LE,
  63     .rate = 44100,
  64     .channels = 2
  65 };
  66
  67 /* A shortcut for terminating the application */
  68 static void quit(int ret) {
  69     assert(mainloop_api);
  70     mainloop_api->quit(mainloop_api, ret);
  71 }
  72
  73 /* Write some data to the stream */
  74 static void do_stream_write(size_t length) {
  75     size_t l;
  76     assert(length);
  77
  78     if (!buffer || !buffer_length)
  79         return;
  80
  81     l = length;
  82     if (l > buffer_length)
  83         l = buffer_length;
  84
  85     pa_stream_write(stream, (uint8_t*) buffer + buffer_index, l, NULL, 0);
  86     buffer_length -= l;
  87     buffer_index += l;
  88
  89     if (!buffer_length) {
  90         free(buffer);
  91         buffer = NULL;
  92         buffer_index = buffer_length = 0;
  93     }
  94 }
  95
  96 /* This is called whenever new data may be written to the stream */
  97 static void stream_write_callback(struct pa_stream *s, size_t length, void *userdata) {
  98     assert(s && length);
  99
 100     if (stdio_event)
 101         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
 102
 103     if (!buffer)
 104         return;
 105
 106     do_stream_write(length);
 107 }
 108
 109 /* This is called whenever new data may is available */
 110 static void stream_read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) {
 111     assert(s && data && length);
 112
 113     if (stdio_event)
 114         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
 115
 116     if (buffer) {
 117         fprintf(stderr, "Buffer overrun, dropping incoming data\n");
 118         return;
 119     }
 120
 121     buffer = malloc(buffer_length = length);
 122     assert(buffer);
 123     memcpy(buffer, data, length);
 124     buffer_index = 0;
 125 }
 126
 127 /* This routine is called whenever the stream state changes */
 128 static void stream_state_callback(struct pa_stream *s, void *userdata) {
 129     assert(s);
 130
 131     switch (pa_stream_get_state(s)) {
 132         case PA_STREAM_CREATING:
 133         case PA_STREAM_TERMINATED:
 134             break;
 135
 136         case PA_STREAM_READY:
 137             if (verbose)
 138                 fprintf(stderr, "Stream successfully created\n");
 139             break;
 140
 141         case PA_STREAM_FAILED:
 142         default:
 143             fprintf(stderr, "Stream error: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 144             quit(1);
 145     }
 146 }
 147
 148 /* This is called whenever the context status changes */
 149 static void context_state_callback(struct pa_context *c, void *userdata) {
 150     assert(c);
 151
 152     switch (pa_context_get_state(c)) {
 153         case PA_CONTEXT_CONNECTING:
 154         case PA_CONTEXT_AUTHORIZING:
 155         case PA_CONTEXT_SETTING_NAME:
 156             break;
 157
 158         case PA_CONTEXT_READY:
 159
 160             assert(c && !stream);
 161
 162             if (verbose)
 163                 fprintf(stderr, "Connection established.\n");
 164
 165             stream = pa_stream_new(c, stream_name, &sample_spec);
 166             assert(stream);
 167
 168             pa_stream_set_state_callback(stream, stream_state_callback, NULL);
 169             pa_stream_set_write_callback(stream, stream_write_callback, NULL);
 170             pa_stream_set_read_callback(stream, stream_read_callback, NULL);
 171
 172             if (mode == PLAYBACK)
 173                 pa_stream_connect_playback(stream, device, NULL, 0, volume);
 174             else
 175                 pa_stream_connect_record(stream, device, NULL, 0);
 176
 177             break;
 178
 179         case PA_CONTEXT_TERMINATED:
 180             quit(0);
 181             break;
 182
 183         case PA_CONTEXT_FAILED:
 184         default:
 185             fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
 186             quit(1);
 187     }
 188 }
 189
 190 /* Connection draining complete */
 191 static void context_drain_complete(struct pa_context*c, void *userdata) {
 192     pa_context_disconnect(c);
 193 }
 194
 195 /* Stream draining complete */
 196 static void stream_drain_complete(struct pa_stream*s, int success, void *userdata) {
 197     struct pa_operation *o;
 198
 199     if (!success) {
 200         fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
 201         quit(1);
 202     }
 203
 204     if (verbose)
 205         fprintf(stderr, "Playback stream drained.\n");
 206
 207     pa_stream_disconnect(stream);
 208     pa_stream_unref(stream);
 209     stream = NULL;
 210
 211     if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
 212         pa_context_disconnect(context);
 213     else {
 214         pa_operation_unref(o);
 215
 216         if (verbose)
 217             fprintf(stderr, "Draining connection to server.\n");
 218     }
 219 }
 220
 221 /* New data on STDIN **/
 222 static void stdin_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
 223     size_t l, w = 0;
 224     ssize_t r;
 225     assert(a == mainloop_api && e && stdio_event == e);
 226
 227     if (buffer) {
 228         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 229         return;
 230     }
 231
 232     if (!stream || pa_stream_get_state(stream) != PA_STREAM_READY || !(l = w = pa_stream_writable_size(stream)))
 233         l = 4096;
 234
 235     buffer = malloc(l);
 236     assert(buffer);
 237     if ((r = read(fd, buffer, l)) <= 0) {
 238         if (r == 0) {
 239             if (verbose)
 240                 fprintf(stderr, "Got EOF.\n");
 241             pa_operation_unref(pa_stream_drain(stream, stream_drain_complete, NULL));
 242         } else {
 243             fprintf(stderr, "read() failed: %s\n", strerror(errno));
 244             quit(1);
 245         }
 246
 247         mainloop_api->io_free(stdio_event);
 248         stdio_event = NULL;
 249         return;
 250     }
 251
 252     buffer_length = r;
 253     buffer_index = 0;
 254
 255     if (w)
 256         do_stream_write(w);
 257 }
 258
 259 /* Some data may be written to STDOUT */
 260 static void stdout_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
 261     ssize_t r;
 262     assert(a == mainloop_api && e && stdio_event == e);
 263
 264     if (!buffer) {
 265         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 266         return;
 267     }
 268
 269     assert(buffer_length);
 270
 271     if ((r = write(fd, (uint8_t*) buffer+buffer_index, buffer_length)) <= 0) {
 272         fprintf(stderr, "write() failed: %s\n", strerror(errno));
 273         quit(1);
 274
 275         mainloop_api->io_free(stdio_event);
 276         stdio_event = NULL;
 277         return;
 278     }
 279
 280     buffer_length -= r;
 281     buffer_index += r;
 282
 283     if (!buffer_length) {
 284         free(buffer);
 285         buffer = NULL;
 286         buffer_length = buffer_index = 0;
 287     }
 288 }
 289
 290 /* UNIX signal to quit recieved */
 291 static void exit_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
 292     if (verbose)
 293         fprintf(stderr, "Got SIGINT, exiting.\n");
 294     quit(0);
 295
 296 }
 297
 298 /* Show the current latency */
 299 static void stream_get_latency_callback(struct pa_stream *s, const struct pa_latency_info *i, void *userdata) {
 300     pa_usec_t total;
 301     int negative = 0;
 302     assert(s);
 303
 304     if (!i) {
 305         fprintf(stderr, "Failed to get latency: %s\n", pa_strerror(pa_context_errno(context)));
 306         quit(1);
 307         return;
 308     }
 309
 310     total = pa_stream_get_latency(s, i, &negative);
 311
 312     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",
 313             (float) i->buffer_usec, (float) i->sink_usec, (float) i->source_usec, (float) i->transport_usec, (float) total * (negative?-1:1),
 314             i->synchronized_clocks ? "yes" : "no");
 315 }
 316
 317 /* Someone requested that the latency is shown */
 318 static void sigusr1_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
 319     fprintf(stderr, "Got SIGUSR1, requesting latency.\n");
 320     pa_operation_unref(pa_stream_get_latency_info(stream, stream_get_latency_callback, NULL));
 321 }
 322
 323
 324 static void help(const char *argv0) {
 325
 326     printf("%s [options]\n\n"
 327            "  -h, --help                            Show this help\n"
 328            "      --version                         Show version\n\n"
 329            "  -r, --record                          Create a connection for recording\n"
 330            "  -p, --playback                        Create a connection for playback\n\n"
 331            "  -v, --verbose                         Enable verbose operations\n\n"
 332            "  -s, --server=SERVER                   The name of the server to connect to\n"
 333            "  -d, --device=DEVICE                   The name of the sink/source to connect to\n"
 334            "  -n, --client-name=NAME                How to call this client on the server\n"
 335            "      --stream-name=NAME                How to call this stream on the server\n"
 336            "      --volume=VOLUME                   Specify the initial (linear) volume in range 0...256\n"
 337            "      --rate=SAMPLERATE                 The sample rate in Hz (defaults to 44100)\n"
 338            "      --format=SAMPLEFORMAT             The sample type, one of s16le, s16be, u8, float32le,\n"
 339            "                                        float32be, ulaw, alaw (defaults to s16ne)\n"
 340            "      --channels=CHANNELS               The number of channels, 1 for mono, 2 for stereo\n"
 341            "                                        (defaults to 2)\n",
 342            argv0);
 343 }
 344
 345 enum {
 346     ARG_VERSION = 256,
 347     ARG_STREAM_NAME,
 348     ARG_VOLUME,
 349     ARG_SAMPLERATE,
 350     ARG_SAMPLEFORMAT,
 351     ARG_CHANNELS
 352 };
 353
 354 int main(int argc, char *argv[]) {
 355     struct pa_mainloop* m = NULL;
 356     int ret = 1, r, c;
 357     char *bn, *server = NULL;
 358
 359     static const struct option long_options[] = {
 360         {"record",      0, NULL, 'r'},
 361         {"playback",    0, NULL, 'p'},
 362         {"device",      1, NULL, 'd'},
 363         {"server",      1, NULL, 's'},
 364         {"client-name", 1, NULL, 'n'},
 365         {"stream-name", 1, NULL, ARG_STREAM_NAME},
 366         {"version",     0, NULL, ARG_VERSION},
 367         {"help",        0, NULL, 'h'},
 368         {"verbose",     0, NULL, 'v'},
 369         {"volume",      1, NULL, ARG_VOLUME},
 370         {"rate",        1, NULL, ARG_SAMPLERATE},
 371         {"format",      1, NULL, ARG_SAMPLEFORMAT},
 372         {"channels",    1, NULL, ARG_CHANNELS},
 373         {NULL,          0, NULL, 0}
 374     };
 375
 376     if (!(bn = strrchr(argv[0], '/')))
 377         bn = argv[0];
 378     else
 379         bn++;
 380
 381     if (strstr(bn, "rec") || strstr(bn, "mon"))
 382         mode = RECORD;
 383     else if (strstr(bn, "cat") || strstr(bn, "play"))
 384         mode = PLAYBACK;
 385
 386     while ((c = getopt_long(argc, argv, "rpd:s:n:hv", long_options, NULL)) != -1) {
 387
 388         switch (c) {
 389             case 'h' :
 390                 help(bn);
 391                 ret = 0;
 392                 goto quit;
 393
 394             case ARG_VERSION:
 395                 printf("pacat "PACKAGE_VERSION"\nCompiled with libpolyp %s\nLinked with libpolyp %s\n", pa_get_headers_version(), pa_get_library_version());
 396                 ret = 0;
 397                 goto quit;
 398
 399             case 'r':
 400                 mode = RECORD;
 401                 break;
 402
 403             case 'p':
 404                 mode = PLAYBACK;
 405                 break;
 406
 407             case 'd':
 408                 free(device);
 409                 device = strdup(optarg);
 410                 break;
 411
 412             case 's':
 413                 free(server);
 414                 server = strdup(optarg);
 415                 break;
 416
 417             case 'n':
 418                 free(client_name);
 419                 client_name = strdup(optarg);
 420                 break;
 421
 422             case ARG_STREAM_NAME:
 423                 free(stream_name);
 424                 stream_name = strdup(optarg);
 425                 break;
 426
 427             case 'v':
 428                 verbose = 1;
 429                 break;
 430
 431             case ARG_VOLUME: {
 432                 int v = atoi(optarg);
 433                 volume = v < 0 ? 0 : v;
 434                 break;
 435             }
 436
 437             case ARG_CHANNELS:
 438                 sample_spec.channels = atoi(optarg);
 439                 break;
 440
 441             case ARG_SAMPLEFORMAT:
 442                 sample_spec.format = pa_parse_sample_format(optarg);
 443                 break;
 444
 445             case ARG_SAMPLERATE:
 446                 sample_spec.rate = atoi(optarg);
 447                 break;
 448
 449             default:
 450                 goto quit;
 451         }
 452     }
 453
 454     if (!client_name)
 455         client_name = strdup(bn);
 456
 457     if (!stream_name)
 458         stream_name = strdup(client_name);
 459
 460     if (!pa_sample_spec_valid(&sample_spec)) {
 461         fprintf(stderr, "Invalid sample specification\n");
 462         goto quit;
 463     }
 464
 465     if (verbose) {
 466         char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
 467         pa_sample_spec_snprint(t, sizeof(t), &sample_spec);
 468         fprintf(stderr, "Opening a %s stream with sample specification '%s'.\n", mode == RECORD ? "recording" : "playback", t);
 469     }
 470
 471     /* Set up a new main loop */
 472     if (!(m = pa_mainloop_new())) {
 473         fprintf(stderr, "pa_mainloop_new() failed.\n");
 474         goto quit;
 475     }
 476
 477     mainloop_api = pa_mainloop_get_api(m);
 478
 479     r = pa_signal_init(mainloop_api);
 480     assert(r == 0);
 481     pa_signal_new(SIGINT, exit_signal_callback, NULL);
 482     pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
 483     signal(SIGPIPE, SIG_IGN);
 484
 485     if (!(stdio_event = mainloop_api->io_new(mainloop_api,
 486                                              mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
 487                                              mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
 488                                              mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
 489         fprintf(stderr, "source_io() failed.\n");
 490         goto quit;
 491     }
 492
 493     /* Create a new connection context */
 494     if (!(context = pa_context_new(mainloop_api, client_name))) {
 495         fprintf(stderr, "pa_context_new() failed.\n");
 496         goto quit;
 497     }
 498
 499     pa_context_set_state_callback(context, context_state_callback, NULL);
 500
 501     /* Connect the context */
 502     pa_context_connect(context, server, 1, NULL);
 503
 504     /* Run the main loop */
 505     if (pa_mainloop_run(m, &ret) < 0) {
 506         fprintf(stderr, "pa_mainloop_run() failed.\n");
 507         goto quit;
 508     }
 509
 510 quit:
 511     if (stream)
 512         pa_stream_unref(stream);
 513
 514     if (context)
 515         pa_context_unref(context);
 516
 517     if (stdio_event) {
 518         assert(mainloop_api);
 519         mainloop_api->io_free(stdio_event);
 520     }
 521
 522     if (m) {
 523         pa_signal_done();
 524         pa_mainloop_free(m);
 525     }
 526
 527     free(buffer);
 528
 529     free(server);
 530     free(device);
 531     free(client_name);
 532     free(stream_name);
 533
 534     return ret;
 535 }