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 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 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
  40 #if PA_API_VERSION != PA_API_VERSION_0_6
  41 #error Invalid Polypaudio API version
  42 #endif
  43
  44 static enum { RECORD, PLAYBACK } mode = PLAYBACK;
  45
  46 static struct pa_context *context = NULL;
  47 static struct pa_stream *stream = NULL;
  48 static struct 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 struct 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 /* A shortcut for terminating the application */
  61 static void quit(int ret) {
  62     assert(mainloop_api);
  63     mainloop_api->quit(mainloop_api, ret);
  64 }
  65
  66 /* Write some data to the stream */
  67 static void do_stream_write(size_t length) {
  68     size_t l;
  69     assert(length);
  70
  71     if (!buffer || !buffer_length)
  72         return;
  73
  74     l = length;
  75     if (l > buffer_length)
  76         l = buffer_length;
  77
  78     pa_stream_write(stream, (uint8_t*) buffer + buffer_index, l, NULL, 0);
  79     buffer_length -= l;
  80     buffer_index += l;
  81
  82     if (!buffer_length) {
  83         free(buffer);
  84         buffer = NULL;
  85         buffer_index = buffer_length = 0;
  86     }
  87 }
  88
  89 /* This is called whenever new data may be written to the stream */
  90 static void stream_write_callback(struct pa_stream *s, size_t length, void *userdata) {
  91     assert(s && length);
  92
  93     if (stdio_event)
  94         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
  95
  96     if (!buffer)
  97         return;
  98
  99     do_stream_write(length);
 100 }
 101
 102 /* This is called whenever new data may is available */
 103 static void stream_read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) {
 104     assert(s && data && length);
 105
 106     if (stdio_event)
 107         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
 108
 109     if (buffer) {
 110         fprintf(stderr, "Buffer overrrun, dropping incoming data\n");
 111         return;
 112     }
 113
 114     buffer = malloc(buffer_length = length);
 115     assert(buffer);
 116     memcpy(buffer, data, length);
 117     buffer_index = 0;
 118 }
 119
 120 /* This routine is called whenever the stream state changes */
 121 static void stream_state_callback(struct pa_stream *s, void *userdata) {
 122     assert(s);
 123
 124     switch (pa_stream_get_state(s)) {
 125         case PA_STREAM_CREATING:
 126         case PA_STREAM_TERMINATED:
 127             break;
 128
 129         case PA_STREAM_READY:
 130             if (verbose)
 131                 fprintf(stderr, "Stream successfully created\n");
 132             break;
 133
 134         case PA_STREAM_FAILED:
 135         default:
 136             fprintf(stderr, "Stream errror: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 137             quit(1);
 138     }
 139 }
 140
 141 /* This is called whenever the context status changes */
 142 static void context_state_callback(struct pa_context *c, void *userdata) {
 143     static const struct pa_sample_spec ss = {
 144         .format = PA_SAMPLE_S16LE,
 145         .rate = 44100,
 146         .channels = 2
 147     };
 148
 149     assert(c);
 150
 151     switch (pa_context_get_state(c)) {
 152         case PA_CONTEXT_CONNECTING:
 153         case PA_CONTEXT_AUTHORIZING:
 154         case PA_CONTEXT_SETTING_NAME:
 155             break;
 156
 157         case PA_CONTEXT_READY:
 158
 159             assert(c && !stream);
 160
 161             if (verbose)
 162                 fprintf(stderr, "Connection established.\n");
 163
 164             stream = pa_stream_new(c, stream_name, &ss);
 165             assert(stream);
 166
 167             pa_stream_set_state_callback(stream, stream_state_callback, NULL);
 168             pa_stream_set_write_callback(stream, stream_write_callback, NULL);
 169             pa_stream_set_read_callback(stream, stream_read_callback, NULL);
 170
 171             if (mode == PLAYBACK)
 172                 pa_stream_connect_playback(stream, device, NULL, 0, volume);
 173             else
 174                 pa_stream_connect_record(stream, device, NULL, 0);
 175
 176             break;
 177
 178         case PA_CONTEXT_TERMINATED:
 179             quit(0);
 180             break;
 181
 182         case PA_CONTEXT_FAILED:
 183         default:
 184             fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
 185             quit(1);
 186     }
 187 }
 188
 189 /* Connection draining complete */
 190 static void context_drain_complete(struct pa_context*c, void *userdata) {
 191     pa_context_disconnect(c);
 192 }
 193
 194 /* Stream draining complete */
 195 static void stream_drain_complete(struct pa_stream*s, int success, void *userdata) {
 196     struct pa_operation *o;
 197
 198     if (!success) {
 199         fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
 200         quit(1);
 201     }
 202
 203     if (verbose)
 204         fprintf(stderr, "Playback stream drained.\n");
 205
 206     pa_stream_disconnect(stream);
 207     pa_stream_unref(stream);
 208     stream = NULL;
 209
 210     if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
 211         pa_context_disconnect(context);
 212     else {
 213         pa_operation_unref(o);
 214
 215         if (verbose)
 216             fprintf(stderr, "Draining connection to server.\n");
 217     }
 218 }
 219
 220 /* New data on STDIN **/
 221 static void stdin_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
 222     size_t l, w = 0;
 223     ssize_t r;
 224     assert(a == mainloop_api && e && stdio_event == e);
 225
 226     if (buffer) {
 227         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 228         return;
 229     }
 230
 231     if (!stream || pa_stream_get_state(stream) != PA_STREAM_READY || !(l = w = pa_stream_writable_size(stream)))
 232         l = 4096;
 233
 234     buffer = malloc(l);
 235     assert(buffer);
 236     if ((r = read(fd, buffer, l)) <= 0) {
 237         if (r == 0) {
 238             if (verbose)
 239                 fprintf(stderr, "Got EOF.\n");
 240             pa_operation_unref(pa_stream_drain(stream, stream_drain_complete, NULL));
 241         } else {
 242             fprintf(stderr, "read() failed: %s\n", strerror(errno));
 243             quit(1);
 244         }
 245
 246         mainloop_api->io_free(stdio_event);
 247         stdio_event = NULL;
 248         return;
 249     }
 250
 251     buffer_length = r;
 252     buffer_index = 0;
 253
 254     if (w)
 255         do_stream_write(w);
 256 }
 257
 258 /* Some data may be written to STDOUT */
 259 static void stdout_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
 260     ssize_t r;
 261     assert(a == mainloop_api && e && stdio_event == e);
 262
 263     if (!buffer) {
 264         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 265         return;
 266     }
 267
 268     assert(buffer_length);
 269
 270     if ((r = write(fd, (uint8_t*) buffer+buffer_index, buffer_length)) <= 0) {
 271         fprintf(stderr, "write() failed: %s\n", strerror(errno));
 272         quit(1);
 273
 274         mainloop_api->io_free(stdio_event);
 275         stdio_event = NULL;
 276         return;
 277     }
 278
 279     buffer_length -= r;
 280     buffer_index += r;
 281
 282     if (!buffer_length) {
 283         free(buffer);
 284         buffer = NULL;
 285         buffer_length = buffer_index = 0;
 286     }
 287 }
 288
 289 /* UNIX signal to quit recieved */
 290 static void exit_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
 291     if (verbose)
 292         fprintf(stderr, "Got SIGINT, exiting.\n");
 293     quit(0);
 294
 295 }
 296
 297 /* Show the current latency */
 298 static void stream_get_latency_callback(struct pa_stream *s, const struct pa_latency_info *i, void *userdata) {
 299     double total;
 300     assert(s);
 301
 302     if (!i) {
 303         fprintf(stderr, "Failed to get latency: %s\n", pa_strerror(pa_context_errno(context)));
 304         quit(1);
 305         return;
 306     }
 307
 308     if (mode == PLAYBACK)
 309         total = (double) i->sink_usec + i->buffer_usec + i->transport_usec;
 310     else
 311         total = (double) i->source_usec + i->buffer_usec + i->transport_usec - i->sink_usec;
 312
 313     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",
 314             (float) i->buffer_usec, (float) i->sink_usec, (float) i->source_usec, (float) i->transport_usec, total,
 315             i->synchronized_clocks ? "yes" : "no");
 316 }
 317
 318 /* Someone requested that the latency is shown */
 319 static void sigusr1_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
 320     fprintf(stderr, "Got SIGUSR1, requesting latency.\n");
 321     pa_operation_unref(pa_stream_get_latency(stream, stream_get_latency_callback, NULL));
 322 }
 323
 324
 325 static void help(const char *argv0) {
 326
 327     printf("%s [options]\n\n"
 328            "  -h, --help                            Show this help\n"
 329            "      --version                         Show version\n\n"
 330            "  -r, --record                          Create a connection for recording\n"
 331            "  -p, --playback                        Create a connection for playback\n\n"
 332            "  -v, --verbose                         Enable verbose operations\n\n"
 333            "  -s, --server=SERVER                   The name of the server to connect to\n"
 334            "  -d, --device=DEVICE                   The name of the sink/source to connect to\n"
 335            "  -n, --client-name=NAME                How to call this client on the server\n"
 336            "      --stream-name=NAME                How to call this stream on the server\n"
 337            "      --volume=VOLUME                   Specify the initial (linear) volume in range 0...256\n",
 338            argv0);
 339 }
 340
 341 enum {
 342     ARG_VERSION = 256,
 343     ARG_STREAM_NAME,
 344     ARG_VOLUME
 345 };
 346
 347 int main(int argc, char *argv[]) {
 348     struct pa_mainloop* m = NULL;
 349     int ret = 1, r, c;
 350     char *bn, *server = NULL;
 351
 352     static const struct option long_options[] = {
 353         {"record",      0, NULL, 'r'},
 354         {"playback",    0, NULL, 'p'},
 355         {"device",      1, NULL, 'd'},
 356         {"server",      1, NULL, 's'},
 357         {"client-name", 1, NULL, 'n'},
 358         {"stream-name", 1, NULL, ARG_STREAM_NAME},
 359         {"version",     0, NULL, ARG_VERSION},
 360         {"help",        0, NULL, 'h'},
 361         {"verbose",     0, NULL, 'v'},
 362         {"volume",      1, NULL, ARG_VOLUME},
 363         {NULL,          0, NULL, 0}
 364     };
 365
 366     if (!(bn = strrchr(argv[0], '/')))
 367         bn = argv[0];
 368     else
 369         bn++;
 370
 371     if (strstr(bn, "rec") || strstr(bn, "mon"))
 372         mode = RECORD;
 373     else if (strstr(bn, "cat") || strstr(bn, "play"))
 374         mode = PLAYBACK;
 375
 376     while ((c = getopt_long(argc, argv, "rpd:s:n:hv", long_options, NULL)) != -1) {
 377
 378         switch (c) {
 379             case 'h' :
 380                 help(bn);
 381                 ret = 0;
 382                 goto quit;
 383
 384             case ARG_VERSION:
 385                 printf("pacat "PACKAGE_VERSION"\nCompiled with libpolyp %s\nLinked with libpolyp %s\n", pa_get_headers_version(), pa_get_library_version());
 386                 ret = 0;
 387                 goto quit;
 388
 389             case 'r':
 390                 mode = RECORD;
 391                 break;
 392
 393             case 'p':
 394                 mode = PLAYBACK;
 395                 break;
 396
 397             case 'd':
 398                 free(device);
 399                 device = strdup(optarg);
 400                 break;
 401
 402             case 's':
 403                 free(server);
 404                 server = strdup(optarg);
 405                 break;
 406
 407             case 'n':
 408                 free(client_name);
 409                 client_name = strdup(optarg);
 410                 break;
 411
 412             case ARG_STREAM_NAME:
 413                 free(stream_name);
 414                 stream_name = strdup(optarg);
 415                 break;
 416
 417             case 'v':
 418                 verbose = 1;
 419                 break;
 420
 421             case ARG_VOLUME: {
 422                 int v = atoi(optarg);
 423                 volume = v < 0 ? 0 : v;
 424                 break;
 425             }
 426
 427             default:
 428                 goto quit;
 429         }
 430     }
 431
 432     if (!client_name)
 433         client_name = strdup(bn);
 434
 435     if (!stream_name)
 436         stream_name = strdup(client_name);
 437
 438     if (verbose)
 439         fprintf(stderr, "Opening a %s stream.\n", mode == RECORD ? "recording" : "playback");
 440
 441     /* Set up a new main loop */
 442     if (!(m = pa_mainloop_new())) {
 443         fprintf(stderr, "pa_mainloop_new() failed.\n");
 444         goto quit;
 445     }
 446
 447     mainloop_api = pa_mainloop_get_api(m);
 448
 449     r = pa_signal_init(mainloop_api);
 450     assert(r == 0);
 451     pa_signal_new(SIGINT, exit_signal_callback, NULL);
 452     pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
 453     signal(SIGPIPE, SIG_IGN);
 454
 455     if (!(stdio_event = mainloop_api->io_new(mainloop_api,
 456                                              mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
 457                                              mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
 458                                              mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
 459         fprintf(stderr, "source_io() failed.\n");
 460         goto quit;
 461     }
 462
 463     /* Create a new connection context */
 464     if (!(context = pa_context_new(mainloop_api, client_name))) {
 465         fprintf(stderr, "pa_context_new() failed.\n");
 466         goto quit;
 467     }
 468
 469     pa_context_set_state_callback(context, context_state_callback, NULL);
 470
 471     /* Connect the context */
 472     pa_context_connect(context, server, 1, NULL);
 473
 474     /* Run the main loop */
 475     if (pa_mainloop_run(m, &ret) < 0) {
 476         fprintf(stderr, "pa_mainloop_run() failed.\n");
 477         goto quit;
 478     }
 479
 480 quit:
 481     if (stream)
 482         pa_stream_unref(stream);
 483
 484     if (context)
 485         pa_context_unref(context);
 486
 487     if (stdio_event) {
 488         assert(mainloop_api);
 489         mainloop_api->io_free(stdio_event);
 490     }
 491
 492     if (m) {
 493         pa_signal_done();
 494         pa_mainloop_free(m);
 495     }
 496
 497     free(buffer);
 498
 499     free(server);
 500     free(device);
 501     free(client_name);
 502     free(stream_name);
 503
 504     return ret;
 505 }