code.delx.au - pulseaudio/blob - src/pulse/simple.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio 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   PulseAudio 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 PulseAudio; 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 <stdio.h>
  27 #include <string.h>
  28 #include <assert.h>
  29 #include <stdlib.h>
  30
  31 #include <pulse/pulseaudio.h>
  32 #include <pulse/thread-mainloop.h>
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/native-common.h>
  36 #include <pulsecore/log.h>
  37
  38 #include "simple.h"
  39
  40 struct pa_simple {
  41     pa_threaded_mainloop *mainloop;
  42     pa_context *context;
  43     pa_stream *stream;
  44     pa_stream_direction_t direction;
  45
  46     const void *read_data;
  47     size_t read_index, read_length;
  48
  49     int operation_success;
  50 };
  51
  52 #define CHECK_VALIDITY_RETURN_ANY(rerror, expression, error, ret) do { \
  53 if (!(expression)) { \
  54     if (rerror) \
  55         *(rerror) = error; \
  56     return (ret); \
  57     }  \
  58 } while(0);
  59
  60 #define CHECK_SUCCESS_GOTO(p, rerror, expression, label) do { \
  61 if (!(expression)) { \
  62     if (rerror) \
  63         *(rerror) = pa_context_errno((p)->context); \
  64     goto label; \
  65     }  \
  66 } while(0);
  67
  68 #define CHECK_DEAD_GOTO(p, rerror, label) do { \
  69 if (!(p)->context || pa_context_get_state((p)->context) != PA_CONTEXT_READY || \
  70     !(p)->stream || pa_stream_get_state((p)->stream) != PA_STREAM_READY) { \
  71         if (((p)->context && pa_context_get_state((p)->context) == PA_CONTEXT_FAILED) || \
  72             ((p)->stream && pa_stream_get_state((p)->stream) == PA_STREAM_FAILED)) { \
  73             if (rerror) \
  74                 *(rerror) = pa_context_errno((p)->context); \
  75         } else \
  76             if (rerror) \
  77                 *(rerror) = PA_ERR_BADSTATE; \
  78         goto label; \
  79     } \
  80 } while(0);
  81
  82 static void context_state_cb(pa_context *c, void *userdata) {
  83     pa_simple *p = userdata;
  84     assert(c);
  85     assert(p);
  86
  87     switch (pa_context_get_state(c)) {
  88         case PA_CONTEXT_READY:
  89         case PA_CONTEXT_TERMINATED:
  90         case PA_CONTEXT_FAILED:
  91             pa_threaded_mainloop_signal(p->mainloop, 0);
  92             break;
  93
  94         case PA_CONTEXT_UNCONNECTED:
  95         case PA_CONTEXT_CONNECTING:
  96         case PA_CONTEXT_AUTHORIZING:
  97         case PA_CONTEXT_SETTING_NAME:
  98             break;
  99     }
 100 }
 101
 102 static void stream_state_cb(pa_stream *s, void * userdata) {
 103     pa_simple *p = userdata;
 104     assert(s);
 105     assert(p);
 106
 107     switch (pa_stream_get_state(s)) {
 108
 109         case PA_STREAM_READY:
 110         case PA_STREAM_FAILED:
 111         case PA_STREAM_TERMINATED:
 112             pa_threaded_mainloop_signal(p->mainloop, 0);
 113             break;
 114
 115         case PA_STREAM_UNCONNECTED:
 116         case PA_STREAM_CREATING:
 117             break;
 118     }
 119 }
 120
 121 static void stream_request_cb(pa_stream *s, size_t length, void *userdata) {
 122     pa_simple *p = userdata;
 123     assert(p);
 124
 125     pa_threaded_mainloop_signal(p->mainloop, 0);
 126 }
 127
 128 static void stream_latency_update_cb(pa_stream *s, void *userdata) {
 129     pa_simple *p = userdata;
 130
 131     assert(p);
 132
 133     pa_threaded_mainloop_signal(p->mainloop, 0);
 134 }
 135
 136 pa_simple* pa_simple_new(
 137     const char *server,
 138     const char *name,
 139     pa_stream_direction_t dir,
 140     const char *dev,
 141     const char *stream_name,
 142     const pa_sample_spec *ss,
 143     const pa_channel_map *map,
 144     const pa_buffer_attr *attr,
 145     int *rerror) {
 146
 147     pa_simple *p;
 148     int error = PA_ERR_INTERNAL, r;
 149
 150     CHECK_VALIDITY_RETURN_ANY(rerror, !server || *server, PA_ERR_INVALID, NULL);
 151     CHECK_VALIDITY_RETURN_ANY(rerror, dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD, PA_ERR_INVALID, NULL);
 152     CHECK_VALIDITY_RETURN_ANY(rerror, !dev || *dev, PA_ERR_INVALID, NULL);
 153     CHECK_VALIDITY_RETURN_ANY(rerror, ss && pa_sample_spec_valid(ss), PA_ERR_INVALID, NULL);
 154     CHECK_VALIDITY_RETURN_ANY(rerror, !map || (pa_channel_map_valid(map) && map->channels == ss->channels), PA_ERR_INVALID, NULL)
 155
 156     p = pa_xnew(pa_simple, 1);
 157     p->context = NULL;
 158     p->stream = NULL;
 159     p->direction = dir;
 160     p->read_data = NULL;
 161     p->read_index = p->read_length = 0;
 162
 163     if (!(p->mainloop = pa_threaded_mainloop_new()))
 164         goto fail;
 165
 166     if (!(p->context = pa_context_new(pa_threaded_mainloop_get_api(p->mainloop), name)))
 167         goto fail;
 168
 169     pa_context_set_state_callback(p->context, context_state_cb, p);
 170
 171     if (pa_context_connect(p->context, server, 0, NULL) < 0) {
 172         error = pa_context_errno(p->context);
 173         goto fail;
 174     }
 175
 176     pa_threaded_mainloop_lock(p->mainloop);
 177
 178     if (pa_threaded_mainloop_start(p->mainloop) < 0)
 179         goto unlock_and_fail;
 180
 181     /* Wait until the context is ready */
 182     pa_threaded_mainloop_wait(p->mainloop);
 183
 184     if (pa_context_get_state(p->context) != PA_CONTEXT_READY) {
 185         error = pa_context_errno(p->context);
 186         goto unlock_and_fail;
 187     }
 188
 189     if (!(p->stream = pa_stream_new(p->context, stream_name, ss, map))) {
 190         error = pa_context_errno(p->context);
 191         goto unlock_and_fail;
 192     }
 193
 194     pa_stream_set_state_callback(p->stream, stream_state_cb, p);
 195     pa_stream_set_read_callback(p->stream, stream_request_cb, p);
 196     pa_stream_set_write_callback(p->stream, stream_request_cb, p);
 197     pa_stream_set_latency_update_callback(p->stream, stream_latency_update_cb, p);
 198
 199     if (dir == PA_STREAM_PLAYBACK)
 200         r = pa_stream_connect_playback(p->stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
 201     else
 202         r = pa_stream_connect_record(p->stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE);
 203
 204     if (r < 0) {
 205         error = pa_context_errno(p->context);
 206         goto unlock_and_fail;
 207     }
 208
 209     /* Wait until the stream is ready */
 210     pa_threaded_mainloop_wait(p->mainloop);
 211
 212     /* Wait until the stream is ready */
 213     if (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
 214         error = pa_context_errno(p->context);
 215         goto unlock_and_fail;
 216     }
 217
 218     pa_threaded_mainloop_unlock(p->mainloop);
 219
 220     return p;
 221
 222 unlock_and_fail:
 223     pa_threaded_mainloop_unlock(p->mainloop);
 224
 225 fail:
 226     if (rerror)
 227         *rerror = error;
 228     pa_simple_free(p);
 229     return NULL;
 230 }
 231
 232 void pa_simple_free(pa_simple *s) {
 233     assert(s);
 234
 235     if (s->mainloop)
 236         pa_threaded_mainloop_stop(s->mainloop);
 237
 238     if (s->stream)
 239         pa_stream_unref(s->stream);
 240
 241     if (s->context)
 242         pa_context_unref(s->context);
 243
 244     if (s->mainloop)
 245         pa_threaded_mainloop_free(s->mainloop);
 246
 247     pa_xfree(s);
 248 }
 249
 250 int pa_simple_write(pa_simple *p, const void*data, size_t length, int *rerror) {
 251     assert(p);
 252
 253     CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, -1);
 254     CHECK_VALIDITY_RETURN_ANY(rerror, data && length, PA_ERR_INVALID, -1);
 255
 256     pa_threaded_mainloop_lock(p->mainloop);
 257
 258     CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 259
 260     while (length > 0) {
 261         size_t l;
 262         int r;
 263
 264         while (!(l = pa_stream_writable_size(p->stream))) {
 265             pa_threaded_mainloop_wait(p->mainloop);
 266             CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 267         }
 268
 269         CHECK_SUCCESS_GOTO(p, rerror, l != (size_t) -1, unlock_and_fail);
 270
 271         if (l > length)
 272             l = length;
 273
 274         r = pa_stream_write(p->stream, data, l, NULL, 0, PA_SEEK_RELATIVE);
 275         CHECK_SUCCESS_GOTO(p, rerror, r >= 0, unlock_and_fail);
 276
 277         data = (const uint8_t*) data + l;
 278         length -= l;
 279     }
 280
 281     pa_threaded_mainloop_unlock(p->mainloop);
 282     return 0;
 283
 284 unlock_and_fail:
 285     pa_threaded_mainloop_unlock(p->mainloop);
 286     return -1;
 287 }
 288
 289 int pa_simple_read(pa_simple *p, void*data, size_t length, int *rerror) {
 290     assert(p);
 291
 292     CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_RECORD, PA_ERR_BADSTATE, -1);
 293     CHECK_VALIDITY_RETURN_ANY(rerror, data && length, PA_ERR_INVALID, -1);
 294
 295     pa_threaded_mainloop_lock(p->mainloop);
 296
 297     CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 298
 299     while (length > 0) {
 300         size_t l;
 301
 302         while (!p->read_data) {
 303             int r;
 304
 305             r = pa_stream_peek(p->stream, &p->read_data, &p->read_length);
 306             CHECK_SUCCESS_GOTO(p, rerror, r == 0, unlock_and_fail);
 307
 308             if (!p->read_data) {
 309                 pa_threaded_mainloop_wait(p->mainloop);
 310                 CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 311             } else
 312                 p->read_index = 0;
 313         }
 314
 315         l = p->read_length < length ? p->read_length : length;
 316         memcpy(data, (const uint8_t*) p->read_data+p->read_index, l);
 317
 318         data = (uint8_t*) data + l;
 319         length -= l;
 320
 321         p->read_index += l;
 322         p->read_length -= l;
 323
 324         if (!p->read_length) {
 325             int r;
 326
 327             r = pa_stream_drop(p->stream);
 328             p->read_data = NULL;
 329             p->read_length = 0;
 330             p->read_index = 0;
 331
 332             CHECK_SUCCESS_GOTO(p, rerror, r == 0, unlock_and_fail);
 333         }
 334     }
 335
 336     pa_threaded_mainloop_unlock(p->mainloop);
 337     return 0;
 338
 339 unlock_and_fail:
 340     pa_threaded_mainloop_unlock(p->mainloop);
 341     return -1;
 342 }
 343
 344 static void success_cb(pa_stream *s, int success, void *userdata) {
 345     pa_simple *p = userdata;
 346
 347     assert(s);
 348     assert(p);
 349
 350     p->operation_success = success;
 351     pa_threaded_mainloop_signal(p->mainloop, 0);
 352 }
 353
 354 int pa_simple_drain(pa_simple *p, int *rerror) {
 355     pa_operation *o = NULL;
 356
 357     assert(p);
 358
 359     CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, -1);
 360
 361     pa_threaded_mainloop_lock(p->mainloop);
 362     CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 363
 364     o = pa_stream_drain(p->stream, success_cb, p);
 365     CHECK_SUCCESS_GOTO(p, rerror, o, unlock_and_fail);
 366
 367     p->operation_success = 0;
 368     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
 369         pa_threaded_mainloop_wait(p->mainloop);
 370         CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 371     }
 372     CHECK_SUCCESS_GOTO(p, rerror, p->operation_success, unlock_and_fail);
 373
 374     pa_operation_unref(o);
 375     pa_threaded_mainloop_unlock(p->mainloop);
 376
 377     return 0;
 378
 379 unlock_and_fail:
 380
 381     if (o) {
 382         pa_operation_cancel(o);
 383         pa_operation_unref(o);
 384     }
 385
 386     pa_threaded_mainloop_unlock(p->mainloop);
 387     return -1;
 388 }
 389
 390 int pa_simple_flush(pa_simple *p, int *rerror) {
 391     pa_operation *o = NULL;
 392
 393     assert(p);
 394
 395     CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, -1);
 396
 397     pa_threaded_mainloop_lock(p->mainloop);
 398     CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 399
 400     o = pa_stream_flush(p->stream, success_cb, p);
 401     CHECK_SUCCESS_GOTO(p, rerror, o, unlock_and_fail);
 402
 403     p->operation_success = 0;
 404     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
 405         pa_threaded_mainloop_wait(p->mainloop);
 406         CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 407     }
 408     CHECK_SUCCESS_GOTO(p, rerror, p->operation_success, unlock_and_fail);
 409
 410     pa_operation_unref(o);
 411     pa_threaded_mainloop_unlock(p->mainloop);
 412
 413     return 0;
 414
 415 unlock_and_fail:
 416
 417     if (o) {
 418         pa_operation_cancel(o);
 419         pa_operation_unref(o);
 420     }
 421
 422     pa_threaded_mainloop_unlock(p->mainloop);
 423     return -1;
 424 }
 425
 426 pa_usec_t pa_simple_get_latency(pa_simple *p, int *rerror) {
 427     pa_usec_t t;
 428     int negative;
 429
 430     assert(p);
 431
 432     pa_threaded_mainloop_lock(p->mainloop);
 433
 434     for (;;) {
 435         CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
 436
 437         if (pa_stream_get_latency(p->stream, &t, &negative) >= 0)
 438             break;
 439
 440         CHECK_SUCCESS_GOTO(p, rerror, pa_context_errno(p->context) == PA_ERR_NODATA, unlock_and_fail);
 441
 442         /* Wait until latency data is available again */
 443         pa_threaded_mainloop_wait(p->mainloop);
 444     }
 445
 446     pa_threaded_mainloop_unlock(p->mainloop);
 447
 448     return negative ? 0 : t;
 449
 450 unlock_and_fail:
 451
 452     pa_threaded_mainloop_unlock(p->mainloop);
 453     return (pa_usec_t) -1;
 454 }
 455