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
  34 #include <polyp/polyplib.h>
  35 #include <polyp/polyplib-error.h>
  36 #include <polyp/mainloop.h>
  37 #include <polyp/mainloop-signal.h>
  38
  39 static enum { RECORD, PLAYBACK } mode = PLAYBACK;
  40
  41 static struct pa_context *context = NULL;
  42 static struct pa_stream *stream = NULL;
  43 static struct pa_mainloop_api *mainloop_api = NULL;
  44
  45 static void *buffer = NULL;
  46 static size_t buffer_length = 0, buffer_index = 0;
  47
  48 static struct pa_io_event* stdio_event = NULL;
  49
  50 /* A shortcut for terminating the application */
  51 static void quit(int ret) {
  52     assert(mainloop_api);
  53     mainloop_api->quit(mainloop_api, ret);
  54 }
  55
  56 /* Write some data to the stream */
  57 static void do_stream_write(size_t length) {
  58     size_t l;
  59     assert(length);
  60
  61     if (!buffer || !buffer_length)
  62         return;
  63
  64     l = length;
  65     if (l > buffer_length)
  66         l = buffer_length;
  67
  68     pa_stream_write(stream, (uint8_t*) buffer + buffer_index, l, NULL, 0);
  69     buffer_length -= l;
  70     buffer_index += l;
  71
  72     if (!buffer_length) {
  73         free(buffer);
  74         buffer = NULL;
  75         buffer_index = buffer_length = 0;
  76     }
  77 }
  78
  79 /* This is called whenever new data may be written to the stream */
  80 static void stream_write_callback(struct pa_stream *s, size_t length, void *userdata) {
  81     assert(s && length);
  82
  83     if (stdio_event)
  84         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_INPUT);
  85
  86     if (!buffer)
  87         return;
  88
  89     do_stream_write(length);
  90 }
  91
  92 /* This is called whenever new data may is available */
  93 static void stream_read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) {
  94     assert(s && data && length);
  95
  96     if (stdio_event)
  97         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_OUTPUT);
  98
  99     if (buffer) {
 100         fprintf(stderr, "Buffer overrrun, dropping incoming data\n");
 101         return;
 102     }
 103
 104     buffer = malloc(buffer_length = length);
 105     assert(buffer);
 106     memcpy(buffer, data, length);
 107     buffer_index = 0;
 108 }
 109
 110 /* This routine is called whenever the stream state changes */
 111 static void stream_state_callback(struct pa_stream *s, void *userdata) {
 112     assert(s);
 113
 114     switch (pa_stream_get_state(s)) {
 115         case PA_STREAM_CREATING:
 116         case PA_STREAM_TERMINATED:
 117             break;
 118
 119         case PA_STREAM_READY:
 120             fprintf(stderr, "Stream successfully created\n");
 121             break;
 122
 123         case PA_STREAM_FAILED:
 124         default:
 125             fprintf(stderr, "Stream errror: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
 126             quit(1);
 127     }
 128 }
 129
 130 /* This is called whenever the context status changes */
 131 static void context_state_callback(struct pa_context *c, void *userdata) {
 132     static const struct pa_sample_spec ss = {
 133         .format = PA_SAMPLE_S16LE,
 134         .rate = 44100,
 135         .channels = 2
 136     };
 137
 138     assert(c);
 139
 140     switch (pa_context_get_state(c)) {
 141         case PA_CONTEXT_CONNECTING:
 142         case PA_CONTEXT_AUTHORIZING:
 143         case PA_CONTEXT_SETTING_NAME:
 144             break;
 145
 146         case PA_CONTEXT_READY:
 147
 148             assert(c && !stream);
 149             fprintf(stderr, "Connection established.\n");
 150
 151             stream = pa_stream_new(c, "pacat", &ss);
 152             assert(stream);
 153
 154             pa_stream_set_state_callback(stream, stream_state_callback, NULL);
 155             pa_stream_set_write_callback(stream, stream_write_callback, NULL);
 156             pa_stream_set_read_callback(stream, stream_read_callback, NULL);
 157
 158             if (mode == PLAYBACK)
 159                 pa_stream_connect_playback(stream, NULL, NULL);
 160             else
 161                 pa_stream_connect_record(stream, NULL, NULL);
 162
 163             break;
 164
 165         case PA_CONTEXT_TERMINATED:
 166             quit(0);
 167             break;
 168
 169         case PA_CONTEXT_FAILED:
 170         default:
 171             fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c)));
 172             quit(1);
 173     }
 174 }
 175
 176 /* Connection draining complete */
 177 static void context_drain_complete(struct pa_context*c, void *userdata) {
 178     pa_context_disconnect(c);
 179 }
 180
 181 /* Stream draining complete */
 182 static void stream_drain_complete(struct pa_stream*s, int success, void *userdata) {
 183     struct pa_operation *o;
 184
 185     if (!success) {
 186         fprintf(stderr, "Failed to drain stream: %s\n", pa_strerror(pa_context_errno(context)));
 187         quit(1);
 188     }
 189
 190     fprintf(stderr, "Playback stream drained.\n");
 191
 192     pa_stream_disconnect(stream);
 193     pa_stream_unref(stream);
 194     stream = NULL;
 195
 196     if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
 197         pa_context_disconnect(context);
 198     else {
 199         pa_operation_unref(o);
 200         fprintf(stderr, "Draining connection to server.\n");
 201     }
 202 }
 203
 204 /* New data on STDIN **/
 205 static void stdin_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
 206     size_t l, w = 0;
 207     ssize_t r;
 208     assert(a == mainloop_api && e && stdio_event == e);
 209
 210     if (buffer) {
 211         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 212         return;
 213     }
 214
 215     if (!stream || pa_stream_get_state(stream) != PA_STREAM_READY || !(l = w = pa_stream_writable_size(stream)))
 216         l = 4096;
 217
 218     buffer = malloc(l);
 219     assert(buffer);
 220     if ((r = read(fd, buffer, l)) <= 0) {
 221         if (r == 0) {
 222             fprintf(stderr, "Got EOF.\n");
 223             pa_operation_unref(pa_stream_drain(stream, stream_drain_complete, NULL));
 224         } else {
 225             fprintf(stderr, "read() failed: %s\n", strerror(errno));
 226             quit(1);
 227         }
 228
 229         mainloop_api->io_free(stdio_event);
 230         stdio_event = NULL;
 231         return;
 232     }
 233
 234     buffer_length = r;
 235     buffer_index = 0;
 236
 237     if (w)
 238         do_stream_write(w);
 239 }
 240
 241 /* Some data may be written to STDOUT */
 242 static void stdout_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
 243     ssize_t r;
 244     assert(a == mainloop_api && e && stdio_event == e);
 245
 246     if (!buffer) {
 247         mainloop_api->io_enable(stdio_event, PA_IO_EVENT_NULL);
 248         return;
 249     }
 250
 251     assert(buffer_length);
 252
 253     if ((r = write(fd, (uint8_t*) buffer+buffer_index, buffer_length)) <= 0) {
 254         fprintf(stderr, "write() failed: %s\n", strerror(errno));
 255         quit(1);
 256
 257         mainloop_api->io_free(stdio_event);
 258         stdio_event = NULL;
 259         return;
 260     }
 261
 262     buffer_length -= r;
 263     buffer_index += r;
 264
 265     if (!buffer_length) {
 266         free(buffer);
 267         buffer = NULL;
 268         buffer_length = buffer_index = 0;
 269     }
 270 }
 271
 272 /* UNIX signal to quit recieved */
 273 static void exit_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
 274     fprintf(stderr, "Got SIGINT, exiting.\n");
 275     quit(0);
 276
 277 }
 278
 279 /* Show the current playback latency */
 280 static void stream_get_latency_callback(struct pa_stream *s, const struct pa_latency_info *i, void *userdata) {
 281     assert(s);
 282
 283     if (!i) {
 284         fprintf(stderr, "Failed to get latency: %s\n", strerror(errno));
 285         quit(1);
 286         return;
 287     }
 288
 289     fprintf(stderr, "Latency: buffer: %0.0f usec; sink: %0.0f usec; transport: %0.0f usec; total: %0.0f usec; synchronized clocks: %s.\n",
 290             (float) i->buffer_usec, (float) i->sink_usec, (float) i->transport_usec,
 291             (float) (i->buffer_usec+i->sink_usec+i->transport_usec),
 292             i->synchronized_clocks ? "yes" : "no");
 293 }
 294
 295 /* Someone requested that the latency is shown */
 296 static void sigusr1_signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
 297     if (mode != PLAYBACK)
 298         return;
 299
 300     fprintf(stderr, "Got SIGUSR1, requesting latency.\n");
 301     pa_operation_unref(pa_stream_get_latency(stream, stream_get_latency_callback, NULL));
 302 }
 303
 304 int main(int argc, char *argv[]) {
 305     struct pa_mainloop* m = NULL;
 306     int ret = 1, r;
 307     char *bn;
 308
 309     if (!(bn = strrchr(argv[0], '/')))
 310         bn = argv[0];
 311     else
 312         bn++;
 313
 314     if (strstr(bn, "rec") || strstr(bn, "mon"))
 315         mode = RECORD;
 316     else if (strstr(bn, "cat") || strstr(bn, "play"))
 317         mode = PLAYBACK;
 318
 319     if (argc >= 2) {
 320         if (!strcmp(argv[1], "-r"))
 321             mode = RECORD;
 322         else if (!strcmp(argv[1], "-p"))
 323             mode = PLAYBACK;
 324         else {
 325             fprintf(stderr, "Invalid argument\n");
 326             goto quit;
 327         }
 328     }
 329
 330     fprintf(stderr, "Opening a %s stream.\n", mode == RECORD ? "recording" : "playback");
 331
 332     /* Set up a new main loop */
 333     if (!(m = pa_mainloop_new())) {
 334         fprintf(stderr, "pa_mainloop_new() failed.\n");
 335         goto quit;
 336     }
 337
 338     mainloop_api = pa_mainloop_get_api(m);
 339
 340     r = pa_signal_init(mainloop_api);
 341     assert(r == 0);
 342     pa_signal_new(SIGINT, exit_signal_callback, NULL);
 343     pa_signal_new(SIGUSR1, sigusr1_signal_callback, NULL);
 344     signal(SIGPIPE, SIG_IGN);
 345
 346     if (!(stdio_event = mainloop_api->io_new(mainloop_api,
 347                                              mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
 348                                              mode == PLAYBACK ? PA_IO_EVENT_INPUT : PA_IO_EVENT_OUTPUT,
 349                                              mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
 350         fprintf(stderr, "source_io() failed.\n");
 351         goto quit;
 352     }
 353
 354     /* Create a new connection context */
 355     if (!(context = pa_context_new(mainloop_api, bn))) {
 356         fprintf(stderr, "pa_context_new() failed.\n");
 357         goto quit;
 358     }
 359
 360     pa_context_set_state_callback(context, context_state_callback, NULL);
 361
 362     /* Connect the context */
 363     pa_context_connect_spawn(context, NULL, NULL, NULL);
 364
 365     /* Run the main loop */
 366     if (pa_mainloop_run(m, &ret) < 0) {
 367         fprintf(stderr, "pa_mainloop_run() failed.\n");
 368         goto quit;
 369     }
 370
 371 quit:
 372     if (stream)
 373         pa_stream_unref(stream);
 374
 375     if (context)
 376         pa_context_unref(context);
 377
 378     if (stdio_event) {
 379         assert(mainloop_api);
 380         mainloop_api->io_free(stdio_event);
 381     }
 382
 383     if (m) {
 384         pa_signal_done();
 385         pa_mainloop_free(m);
 386     }
 387
 388     if (buffer)
 389         free(buffer);
 390
 391     return ret;
 392 }