code.delx.au - pulseaudio/blob - polyp/polyplib-stream.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 <assert.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include "polyplib-internal.h"
  32 #include "xmalloc.h"
  33 #include "pstream-util.h"
  34 #include "util.h"
  35
  36 #define LATENCY_IPOL_INTERVAL_USEC (100000L)
  37
  38 struct pa_stream *pa_stream_new(struct pa_context *c, const char *name, const struct pa_sample_spec *ss) {
  39     struct pa_stream *s;
  40     assert(c && ss);
  41
  42     s = pa_xmalloc(sizeof(struct pa_stream));
  43     s->ref = 1;
  44     s->context = c;
  45     s->mainloop = c->mainloop;
  46
  47     s->read_callback = NULL;
  48     s->read_userdata = NULL;
  49     s->write_callback = NULL;
  50     s->write_userdata = NULL;
  51     s->state_callback = NULL;
  52     s->state_userdata = NULL;
  53
  54     s->direction = PA_STREAM_NODIRECTION;
  55     s->name = pa_xstrdup(name);
  56     s->sample_spec = *ss;
  57     s->channel = 0;
  58     s->channel_valid = 0;
  59     s->device_index = PA_INVALID_INDEX;
  60     s->requested_bytes = 0;
  61     s->state = PA_STREAM_DISCONNECTED;
  62     memset(&s->buffer_attr, 0, sizeof(s->buffer_attr));
  63
  64     s->mcalign = pa_mcalign_new(pa_frame_size(ss), c->memblock_stat);
  65
  66     s->counter = 0;
  67     s->previous_time = 0;
  68
  69     s->corked = 0;
  70     s->interpolate = 0;
  71
  72     s->ipol_usec = 0;
  73     memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp));
  74     s->ipol_event = NULL;
  75
  76     PA_LLIST_PREPEND(struct pa_stream, c->streams, s);
  77
  78     return pa_stream_ref(s);
  79 }
  80
  81 static void stream_free(struct pa_stream *s) {
  82     assert(s);
  83
  84     if (s->ipol_event) {
  85         assert(s->mainloop);
  86         s->mainloop->time_free(s->ipol_event);
  87     }
  88
  89     pa_mcalign_free(s->mcalign);
  90
  91     pa_xfree(s->name);
  92     pa_xfree(s);
  93 }
  94
  95 void pa_stream_unref(struct pa_stream *s) {
  96     assert(s && s->ref >= 1);
  97
  98     if (--(s->ref) == 0)
  99         stream_free(s);
 100 }
 101
 102 struct pa_stream* pa_stream_ref(struct pa_stream *s) {
 103     assert(s && s->ref >= 1);
 104     s->ref++;
 105     return s;
 106 }
 107
 108 enum pa_stream_state pa_stream_get_state(struct pa_stream *s) {
 109     assert(s && s->ref >= 1);
 110     return s->state;
 111 }
 112
 113 struct pa_context* pa_stream_get_context(struct pa_stream *s) {
 114     assert(s && s->ref >= 1);
 115     return s->context;
 116 }
 117
 118 uint32_t pa_stream_get_index(struct pa_stream *s) {
 119     assert(s && s->ref >= 1);
 120     return s->device_index;
 121 }
 122
 123 void pa_stream_set_state(struct pa_stream *s, enum pa_stream_state st) {
 124     assert(s && s->ref >= 1);
 125
 126     if (s->state == st)
 127         return;
 128
 129     pa_stream_ref(s);
 130
 131     s->state = st;
 132
 133     if ((st == PA_STREAM_FAILED || st == PA_STREAM_TERMINATED) && s->context) {
 134         if (s->channel_valid)
 135             pa_dynarray_put((s->direction == PA_STREAM_PLAYBACK) ? s->context->playback_streams : s->context->record_streams, s->channel, NULL);
 136
 137         PA_LLIST_REMOVE(struct pa_stream, s->context->streams, s);
 138         pa_stream_unref(s);
 139     }
 140
 141     if (s->state_callback)
 142         s->state_callback(s, s->state_userdata);
 143
 144     pa_stream_unref(s);
 145 }
 146
 147 void pa_command_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 148     struct pa_context *c = userdata;
 149     struct pa_stream *s;
 150     uint32_t channel;
 151     assert(pd && (command == PA_COMMAND_PLAYBACK_STREAM_KILLED || command == PA_COMMAND_RECORD_STREAM_KILLED) && t && c);
 152
 153     pa_context_ref(c);
 154
 155     if (pa_tagstruct_getu32(t, &channel) < 0 ||
 156         !pa_tagstruct_eof(t)) {
 157         pa_context_fail(c, PA_ERROR_PROTOCOL);
 158         goto finish;
 159     }
 160
 161     if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_KILLED ? c->playback_streams : c->record_streams, channel)))
 162         goto finish;
 163
 164     c->error = PA_ERROR_KILLED;
 165     pa_stream_set_state(s, PA_STREAM_FAILED);
 166
 167 finish:
 168     pa_context_unref(c);
 169 }
 170
 171 void pa_command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 172     struct pa_stream *s;
 173     struct pa_context *c = userdata;
 174     uint32_t bytes, channel;
 175     assert(pd && command == PA_COMMAND_REQUEST && t && c);
 176
 177     pa_context_ref(c);
 178
 179     if (pa_tagstruct_getu32(t, &channel) < 0 ||
 180         pa_tagstruct_getu32(t, &bytes) < 0 ||
 181         !pa_tagstruct_eof(t)) {
 182         pa_context_fail(c, PA_ERROR_PROTOCOL);
 183         goto finish;
 184     }
 185
 186     if (!(s = pa_dynarray_get(c->playback_streams, channel)))
 187         goto finish;
 188
 189     if (s->state != PA_STREAM_READY)
 190         goto finish;
 191
 192     pa_stream_ref(s);
 193
 194     s->requested_bytes += bytes;
 195
 196     if (s->requested_bytes && s->write_callback)
 197         s->write_callback(s, s->requested_bytes, s->write_userdata);
 198
 199     pa_stream_unref(s);
 200
 201 finish:
 202     pa_context_unref(c);
 203 }
 204
 205 static void ipol_callback(struct pa_mainloop_api *m, struct pa_time_event *e, const struct timeval *tv, void *userdata) {
 206     struct timeval tv2;
 207     struct pa_stream *s = userdata;
 208
 209     pa_stream_ref(s);
 210
 211     if (s->state == PA_STREAM_READY)
 212         pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
 213
 214     gettimeofday(&tv2, NULL);
 215     tv2.tv_usec += LATENCY_IPOL_INTERVAL_USEC;
 216
 217     m->time_restart(e, &tv2);
 218
 219     pa_stream_unref(s);
 220 }
 221
 222
 223 void pa_create_stream_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 224     struct pa_stream *s = userdata;
 225     assert(pd && s && s->state == PA_STREAM_CREATING);
 226
 227     pa_stream_ref(s);
 228
 229     if (command != PA_COMMAND_REPLY) {
 230         if (pa_context_handle_error(s->context, command, t) < 0)
 231             goto finish;
 232
 233         pa_stream_set_state(s, PA_STREAM_FAILED);
 234         goto finish;
 235     }
 236
 237     if (pa_tagstruct_getu32(t, &s->channel) < 0 ||
 238         ((s->direction != PA_STREAM_UPLOAD) && pa_tagstruct_getu32(t, &s->device_index) < 0) ||
 239         ((s->direction != PA_STREAM_RECORD) && pa_tagstruct_getu32(t, &s->requested_bytes) < 0) ||
 240         !pa_tagstruct_eof(t)) {
 241         pa_context_fail(s->context, PA_ERROR_PROTOCOL);
 242         goto finish;
 243     }
 244
 245     s->channel_valid = 1;
 246     pa_dynarray_put((s->direction == PA_STREAM_RECORD) ? s->context->record_streams : s->context->playback_streams, s->channel, s);
 247     pa_stream_set_state(s, PA_STREAM_READY);
 248
 249     if (s->interpolate) {
 250         struct timeval tv;
 251         pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
 252
 253         gettimeofday(&tv, NULL);
 254         tv.tv_usec += LATENCY_IPOL_INTERVAL_USEC; /* every 100 ms */
 255
 256         assert(!s->ipol_event);
 257         s->ipol_event = s->mainloop->time_new(s->mainloop, &tv, &ipol_callback, s);
 258     }
 259
 260     if (s->requested_bytes && s->ref > 1 && s->write_callback)
 261         s->write_callback(s, s->requested_bytes, s->write_userdata);
 262
 263 finish:
 264     pa_stream_unref(s);
 265 }
 266
 267 static void create_stream(struct pa_stream *s, const char *dev, const struct pa_buffer_attr *attr, enum pa_stream_flags flags, pa_volume_t volume) {
 268     struct pa_tagstruct *t;
 269     uint32_t tag;
 270     assert(s && s->ref >= 1 && s->state == PA_STREAM_DISCONNECTED);
 271
 272     pa_stream_ref(s);
 273
 274     s->interpolate = !!(flags & PA_STREAM_INTERPOLATE_LATENCY);
 275     pa_stream_trash_ipol(s);
 276
 277     if (attr)
 278         s->buffer_attr = *attr;
 279     else {
 280         s->buffer_attr.maxlength = DEFAULT_MAXLENGTH;
 281         s->buffer_attr.tlength = DEFAULT_TLENGTH;
 282         s->buffer_attr.prebuf = DEFAULT_PREBUF;
 283         s->buffer_attr.minreq = DEFAULT_MINREQ;
 284         s->buffer_attr.fragsize = DEFAULT_FRAGSIZE;
 285     }
 286
 287     pa_stream_set_state(s, PA_STREAM_CREATING);
 288
 289     t = pa_tagstruct_new(NULL, 0);
 290     assert(t);
 291
 292     if (!dev) {
 293         if (s->direction == PA_STREAM_PLAYBACK)
 294             dev = s->context->conf->default_sink;
 295         else
 296             dev = s->context->conf->default_source;
 297     }
 298
 299     pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CREATE_PLAYBACK_STREAM : PA_COMMAND_CREATE_RECORD_STREAM);
 300     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 301     pa_tagstruct_puts(t, s->name);
 302     pa_tagstruct_put_sample_spec(t, &s->sample_spec);
 303     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 304     pa_tagstruct_puts(t, dev);
 305     pa_tagstruct_putu32(t, s->buffer_attr.maxlength);
 306     pa_tagstruct_put_boolean(t, !!(flags & PA_STREAM_START_CORKED));
 307     if (s->direction == PA_STREAM_PLAYBACK) {
 308         pa_tagstruct_putu32(t, s->buffer_attr.tlength);
 309         pa_tagstruct_putu32(t, s->buffer_attr.prebuf);
 310         pa_tagstruct_putu32(t, s->buffer_attr.minreq);
 311         pa_tagstruct_putu32(t, volume);
 312     } else
 313         pa_tagstruct_putu32(t, s->buffer_attr.fragsize);
 314
 315     pa_pstream_send_tagstruct(s->context->pstream, t);
 316     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s);
 317
 318     pa_stream_unref(s);
 319 }
 320
 321 void pa_stream_connect_playback(struct pa_stream *s, const char *dev, const struct pa_buffer_attr *attr, enum pa_stream_flags flags, pa_volume_t volume) {
 322     assert(s && s->context->state == PA_CONTEXT_READY && s->ref >= 1);
 323     s->direction = PA_STREAM_PLAYBACK;
 324     create_stream(s, dev, attr, flags, volume);
 325 }
 326
 327 void pa_stream_connect_record(struct pa_stream *s, const char *dev, const struct pa_buffer_attr *attr, enum pa_stream_flags flags) {
 328     assert(s && s->context->state == PA_CONTEXT_READY && s->ref >= 1);
 329     s->direction = PA_STREAM_RECORD;
 330     create_stream(s, dev, attr, flags, 0);
 331 }
 332
 333 void pa_stream_write(struct pa_stream *s, const void *data, size_t length, void (*free_cb)(void *p), size_t delta) {
 334     struct pa_memchunk chunk;
 335     assert(s && s->context && data && length && s->state == PA_STREAM_READY && s->ref >= 1);
 336
 337     if (free_cb) {
 338         chunk.memblock = pa_memblock_new_user((void*) data, length, free_cb, 1, s->context->memblock_stat);
 339         assert(chunk.memblock && chunk.memblock->data);
 340     } else {
 341         chunk.memblock = pa_memblock_new(length, s->context->memblock_stat);
 342         assert(chunk.memblock && chunk.memblock->data);
 343         memcpy(chunk.memblock->data, data, length);
 344     }
 345     chunk.index = 0;
 346     chunk.length = length;
 347
 348     pa_pstream_send_memblock(s->context->pstream, s->channel, delta, &chunk);
 349     pa_memblock_unref(chunk.memblock);
 350
 351     if (length < s->requested_bytes)
 352         s->requested_bytes -= length;
 353     else
 354         s->requested_bytes = 0;
 355
 356     s->counter += length;
 357 }
 358
 359 size_t pa_stream_writable_size(struct pa_stream *s) {
 360     assert(s && s->ref >= 1);
 361     return s->state == PA_STREAM_READY ? s->requested_bytes : 0;
 362 }
 363
 364 struct pa_operation * pa_stream_drain(struct pa_stream *s, void (*cb) (struct pa_stream*s, int success, void *userdata), void *userdata) {
 365     struct pa_operation *o;
 366     struct pa_tagstruct *t;
 367     uint32_t tag;
 368     assert(s && s->ref >= 1 && s->state == PA_STREAM_READY);
 369
 370     o = pa_operation_new(s->context, s);
 371     assert(o);
 372     o->callback = cb;
 373     o->userdata = userdata;
 374
 375     t = pa_tagstruct_new(NULL, 0);
 376     assert(t);
 377     pa_tagstruct_putu32(t, PA_COMMAND_DRAIN_PLAYBACK_STREAM);
 378     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 379     pa_tagstruct_putu32(t, s->channel);
 380     pa_pstream_send_tagstruct(s->context->pstream, t);
 381     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
 382
 383     return pa_operation_ref(o);
 384 }
 385
 386 static void stream_get_latency_info_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 387     struct pa_operation *o = userdata;
 388     struct pa_latency_info i, *p = NULL;
 389     struct timeval local, remote, now;
 390     assert(pd && o && o->stream && o->context);
 391
 392     if (command != PA_COMMAND_REPLY) {
 393         if (pa_context_handle_error(o->context, command, t) < 0)
 394             goto finish;
 395
 396     } else if (pa_tagstruct_get_usec(t, &i.buffer_usec) < 0 ||
 397                pa_tagstruct_get_usec(t, &i.sink_usec) < 0 ||
 398                pa_tagstruct_get_usec(t, &i.source_usec) < 0 ||
 399                pa_tagstruct_get_boolean(t, &i.playing) < 0 ||
 400                pa_tagstruct_getu32(t, &i.queue_length) < 0 ||
 401                pa_tagstruct_get_timeval(t, &local) < 0 ||
 402                pa_tagstruct_get_timeval(t, &remote) < 0 ||
 403                pa_tagstruct_getu64(t, &i.counter) < 0 ||
 404                !pa_tagstruct_eof(t)) {
 405         pa_context_fail(o->context, PA_ERROR_PROTOCOL);
 406         goto finish;
 407     } else {
 408         gettimeofday(&now, NULL);
 409
 410         if (pa_timeval_cmp(&local, &remote) < 0 && pa_timeval_cmp(&remote, &now)) {
 411             /* local and remote seem to have synchronized clocks */
 412
 413             if (o->stream->direction == PA_STREAM_PLAYBACK)
 414                 i.transport_usec = pa_timeval_diff(&remote, &local);
 415             else
 416                 i.transport_usec = pa_timeval_diff(&now, &remote);
 417
 418             i.synchronized_clocks = 1;
 419             i.timestamp = remote;
 420         } else {
 421             /* clocks are not synchronized, let's estimate latency then */
 422             i.transport_usec = pa_timeval_diff(&now, &local)/2;
 423             i.synchronized_clocks = 0;
 424             i.timestamp = local;
 425             pa_timeval_add(&i.timestamp, i.transport_usec);
 426         }
 427
 428         if (o->stream->interpolate) {
 429             o->stream->ipol_timestamp = i.timestamp;
 430             o->stream->ipol_usec = pa_stream_get_time(o->stream, &i);
 431         }
 432
 433         p = &i;
 434     }
 435
 436     if (o->callback) {
 437         void (*cb)(struct pa_stream *s, const struct pa_latency_info *i, void *userdata) = o->callback;
 438         cb(o->stream, p, o->userdata);
 439     }
 440
 441 finish:
 442     pa_operation_done(o);
 443     pa_operation_unref(o);
 444 }
 445
 446 struct pa_operation* pa_stream_get_latency_info(struct pa_stream *s, void (*cb)(struct pa_stream *p, const struct pa_latency_info*i, void *userdata), void *userdata) {
 447     uint32_t tag;
 448     struct pa_operation *o;
 449     struct pa_tagstruct *t;
 450     struct timeval now;
 451     assert(s && s->direction != PA_STREAM_UPLOAD);
 452
 453     o = pa_operation_new(s->context, s);
 454     assert(o);
 455     o->callback = cb;
 456     o->userdata = userdata;
 457
 458     t = pa_tagstruct_new(NULL, 0);
 459     assert(t);
 460     pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_GET_PLAYBACK_LATENCY : PA_COMMAND_GET_RECORD_LATENCY);
 461     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 462     pa_tagstruct_putu32(t, s->channel);
 463
 464     gettimeofday(&now, NULL);
 465     pa_tagstruct_put_timeval(t, &now);
 466     pa_tagstruct_putu64(t, s->counter);
 467
 468     pa_pstream_send_tagstruct(s->context->pstream, t);
 469     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_info_callback, o);
 470
 471     return pa_operation_ref(o);
 472 }
 473
 474 void pa_stream_disconnect_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 475     struct pa_stream *s = userdata;
 476     assert(pd && s && s->ref >= 1);
 477
 478     pa_stream_ref(s);
 479
 480     if (command != PA_COMMAND_REPLY) {
 481         if (pa_context_handle_error(s->context, command, t) < 0)
 482             goto finish;
 483
 484         pa_stream_set_state(s, PA_STREAM_FAILED);
 485         goto finish;
 486     } else if (!pa_tagstruct_eof(t)) {
 487         pa_context_fail(s->context, PA_ERROR_PROTOCOL);
 488         goto finish;
 489     }
 490
 491     pa_stream_set_state(s, PA_STREAM_TERMINATED);
 492
 493 finish:
 494     pa_stream_unref(s);
 495 }
 496
 497 void pa_stream_disconnect(struct pa_stream *s) {
 498     struct pa_tagstruct *t;
 499     uint32_t tag;
 500     assert(s && s->ref >= 1);
 501
 502     if (!s->channel_valid || !s->context->state == PA_CONTEXT_READY)
 503         return;
 504
 505     pa_stream_ref(s);
 506
 507     t = pa_tagstruct_new(NULL, 0);
 508     assert(t);
 509
 510     pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_DELETE_PLAYBACK_STREAM :
 511                         (s->direction == PA_STREAM_RECORD ? PA_COMMAND_DELETE_RECORD_STREAM : PA_COMMAND_DELETE_UPLOAD_STREAM));
 512     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 513     pa_tagstruct_putu32(t, s->channel);
 514     pa_pstream_send_tagstruct(s->context->pstream, t);
 515     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_disconnect_callback, s);
 516
 517     pa_stream_unref(s);
 518 }
 519
 520 void pa_stream_set_read_callback(struct pa_stream *s, void (*cb)(struct pa_stream *p, const void*data, size_t length, void *userdata), void *userdata) {
 521     assert(s && s->ref >= 1);
 522     s->read_callback = cb;
 523     s->read_userdata = userdata;
 524 }
 525
 526 void pa_stream_set_write_callback(struct pa_stream *s, void (*cb)(struct pa_stream *p, size_t length, void *userdata), void *userdata) {
 527     assert(s && s->ref >= 1);
 528     s->write_callback = cb;
 529     s->write_userdata = userdata;
 530 }
 531
 532 void pa_stream_set_state_callback(struct pa_stream *s, void (*cb)(struct pa_stream *s, void *userdata), void *userdata) {
 533     assert(s && s->ref >= 1);
 534     s->state_callback = cb;
 535     s->state_userdata = userdata;
 536 }
 537
 538 void pa_stream_simple_ack_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 539     struct pa_operation *o = userdata;
 540     int success = 1;
 541     assert(pd && o && o->context && o->ref >= 1);
 542
 543     if (command != PA_COMMAND_REPLY) {
 544         if (pa_context_handle_error(o->context, command, t) < 0)
 545             goto finish;
 546
 547         success = 0;
 548     } else if (!pa_tagstruct_eof(t)) {
 549         pa_context_fail(o->context, PA_ERROR_PROTOCOL);
 550         goto finish;
 551     }
 552
 553     if (o->callback) {
 554         void (*cb)(struct pa_stream *s, int success, void *userdata) = o->callback;
 555         cb(o->stream, success, o->userdata);
 556     }
 557
 558 finish:
 559     pa_operation_done(o);
 560     pa_operation_unref(o);
 561 }
 562
 563 struct pa_operation* pa_stream_cork(struct pa_stream *s, int b, void (*cb) (struct pa_stream*s, int success, void *userdata), void *userdata) {
 564     struct pa_operation *o;
 565     struct pa_tagstruct *t;
 566     uint32_t tag;
 567     assert(s && s->ref >= 1 && s->state == PA_STREAM_READY);
 568
 569     if (s->interpolate) {
 570             if (!s->corked && b)
 571                 s->ipol_usec = pa_stream_get_interpolated_time(s);
 572             else if (s->corked && !b)
 573                 gettimeofday(&s->ipol_timestamp, NULL);
 574     }
 575
 576     s->corked = b;
 577
 578     o = pa_operation_new(s->context, s);
 579     assert(o);
 580     o->callback = cb;
 581     o->userdata = userdata;
 582
 583     t = pa_tagstruct_new(NULL, 0);
 584     assert(t);
 585     pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CORK_PLAYBACK_STREAM : PA_COMMAND_CORK_RECORD_STREAM);
 586     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 587     pa_tagstruct_putu32(t, s->channel);
 588     pa_tagstruct_put_boolean(t, !!b);
 589     pa_pstream_send_tagstruct(s->context->pstream, t);
 590     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
 591
 592     pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
 593
 594     return pa_operation_ref(o);
 595 }
 596
 597 struct pa_operation* pa_stream_send_simple_command(struct pa_stream *s, uint32_t command, void (*cb)(struct pa_stream *s, int success, void *userdata), void *userdata) {
 598     struct pa_tagstruct *t;
 599     struct pa_operation *o;
 600     uint32_t tag;
 601     assert(s && s->ref >= 1 && s->state == PA_STREAM_READY);
 602
 603     o = pa_operation_new(s->context, s);
 604     o->callback = cb;
 605     o->userdata = userdata;
 606
 607     t = pa_tagstruct_new(NULL, 0);
 608     pa_tagstruct_putu32(t, command);
 609     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 610     pa_tagstruct_putu32(t, s->channel);
 611     pa_pstream_send_tagstruct(s->context->pstream, t);
 612     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
 613
 614     return pa_operation_ref(o);
 615 }
 616
 617 struct pa_operation* pa_stream_flush(struct pa_stream *s, void (*cb)(struct pa_stream *s, int success, void *userdata), void *userdata) {
 618     struct pa_operation *o;
 619     o = pa_stream_send_simple_command(s, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_FLUSH_PLAYBACK_STREAM : PA_COMMAND_FLUSH_RECORD_STREAM, cb, userdata);
 620     pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
 621     return o;
 622 }
 623
 624 struct pa_operation* pa_stream_prebuf(struct pa_stream *s, void (*cb)(struct pa_stream *s, int success, void *userdata), void *userdata) {
 625     struct pa_operation *o;
 626     o = pa_stream_send_simple_command(s, PA_COMMAND_PREBUF_PLAYBACK_STREAM, cb, userdata);
 627     pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
 628     return o;
 629 }
 630
 631 struct pa_operation* pa_stream_trigger(struct pa_stream *s, void (*cb)(struct pa_stream *s, int success, void *userdata), void *userdata) {
 632     struct pa_operation *o;
 633     o = pa_stream_send_simple_command(s, PA_COMMAND_TRIGGER_PLAYBACK_STREAM, cb, userdata);
 634     pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
 635     return o;
 636 }
 637
 638 struct pa_operation* pa_stream_set_name(struct pa_stream *s, const char *name, void(*cb)(struct pa_stream*c, int success,  void *userdata), void *userdata) {
 639     struct pa_operation *o;
 640     struct pa_tagstruct *t;
 641     uint32_t tag;
 642     assert(s && s->ref >= 1 && s->state == PA_STREAM_READY && name && s->direction != PA_STREAM_UPLOAD);
 643
 644     o = pa_operation_new(s->context, s);
 645     assert(o);
 646     o->callback = cb;
 647     o->userdata = userdata;
 648
 649     t = pa_tagstruct_new(NULL, 0);
 650     assert(t);
 651     pa_tagstruct_putu32(t, s->direction == PA_STREAM_RECORD ? PA_COMMAND_SET_RECORD_STREAM_NAME : PA_COMMAND_SET_PLAYBACK_STREAM_NAME);
 652     pa_tagstruct_putu32(t, tag = s->context->ctag++);
 653     pa_tagstruct_putu32(t, s->channel);
 654     pa_tagstruct_puts(t, name);
 655     pa_pstream_send_tagstruct(s->context->pstream, t);
 656     pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
 657
 658     return pa_operation_ref(o);
 659 }
 660
 661 uint64_t pa_stream_get_counter(struct pa_stream *s) {
 662     assert(s);
 663     return s->counter;
 664 }
 665
 666 pa_usec_t pa_stream_get_time(struct pa_stream *s, const struct pa_latency_info *i) {
 667     pa_usec_t usec;
 668     assert(s);
 669
 670     usec = pa_bytes_to_usec(i->counter, &s->sample_spec);
 671
 672     if (i) {
 673         if (s->direction == PA_STREAM_PLAYBACK) {
 674             pa_usec_t latency = i->transport_usec + i->buffer_usec + i->sink_usec;
 675             if (usec < latency)
 676                 usec = 0;
 677             else
 678                 usec -= latency;
 679
 680         } else if (s->direction == PA_STREAM_RECORD) {
 681             usec += i->source_usec + i->buffer_usec + i->transport_usec;
 682
 683             if (usec > i->sink_usec)
 684                 usec -= i->sink_usec;
 685             else
 686                 usec = 0;
 687         }
 688     }
 689
 690     if (usec < s->previous_time)
 691         usec = s->previous_time;
 692
 693     s->previous_time = usec;
 694
 695     return usec;
 696 }
 697
 698 static pa_usec_t time_counter_diff(struct pa_stream *s, pa_usec_t t, pa_usec_t c, int *negative) {
 699     assert(s);
 700
 701     if (negative)
 702         *negative = 0;
 703
 704     if (c < t) {
 705         if (s->direction == PA_STREAM_RECORD) {
 706             if (negative)
 707                 *negative = 1;
 708
 709             return t-c;
 710         } else
 711             return 0;
 712     } else
 713         return c-t;
 714 }
 715
 716 pa_usec_t pa_stream_get_latency(struct pa_stream *s, const struct pa_latency_info *i, int *negative) {
 717     pa_usec_t t, c;
 718     assert(s && i);
 719
 720     t = pa_stream_get_time(s, i);
 721     c = pa_bytes_to_usec(s->counter, &s->sample_spec);
 722
 723     return time_counter_diff(s, t, c, negative);
 724 }
 725
 726 const struct pa_sample_spec* pa_stream_get_sample_spec(struct pa_stream *s) {
 727     assert(s);
 728     return &s->sample_spec;
 729 }
 730
 731 void pa_stream_trash_ipol(struct pa_stream *s) {
 732     assert(s);
 733
 734     if (!s->interpolate)
 735         return;
 736
 737     memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp));
 738     s->ipol_usec = 0;
 739 }
 740
 741 pa_usec_t pa_stream_get_interpolated_time(struct pa_stream *s) {
 742     pa_usec_t usec;
 743     assert(s && s->interpolate);
 744
 745     if (s->corked)
 746         usec = s->ipol_usec;
 747     else {
 748         if (s->ipol_timestamp.tv_sec == 0)
 749             usec = 0;
 750         else
 751             usec = s->ipol_usec + pa_timeval_age(&s->ipol_timestamp);
 752     }
 753
 754     if (usec < s->previous_time)
 755         usec = s->previous_time;
 756
 757     s->previous_time = usec;
 758     return usec;
 759 }
 760
 761 pa_usec_t pa_stream_get_interpolated_latency(struct pa_stream *s, int *negative) {
 762     pa_usec_t t, c;
 763     assert(s && s->interpolate);
 764
 765     t = pa_stream_get_interpolated_time(s);
 766     c = pa_bytes_to_usec(s->counter, &s->sample_spec);
 767
 768     return time_counter_diff(s, t, c, negative);
 769 }