code.delx.au - pulseaudio/blob - polyp/polyplib-subscribe.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 <assert.h>
  27 #include <stdio.h>
  28
  29 #include "polyplib-subscribe.h"
  30 #include "polyplib-internal.h"
  31 #include "pstream-util.h"
  32
  33 void pa_command_subscribe_event(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
  34     struct pa_context *c = userdata;
  35     enum pa_subscription_event_type e;
  36     uint32_t index;
  37     assert(pd && command == PA_COMMAND_SUBSCRIBE_EVENT && t && c);
  38
  39     pa_context_ref(c);
  40
  41     if (pa_tagstruct_getu32(t, &e) < 0 ||
  42         pa_tagstruct_getu32(t, &index) < 0 ||
  43         !pa_tagstruct_eof(t)) {
  44         pa_context_fail(c, PA_ERROR_PROTOCOL);
  45         goto finish;
  46     }
  47
  48     if (c->subscribe_callback)
  49         c->subscribe_callback(c, e, index, c->subscribe_userdata);
  50
  51 finish:
  52     pa_context_unref(c);
  53 }
  54
  55
  56 struct pa_operation* pa_context_subscribe(struct pa_context *c, enum pa_subscription_mask m, void (*cb)(struct pa_context *c, int success, void *userdata), void *userdata) {
  57     struct pa_operation *o;
  58     struct pa_tagstruct *t;
  59     uint32_t tag;
  60     assert(c);
  61
  62     o = pa_operation_new(c, NULL);
  63     o->callback = cb;
  64     o->userdata = userdata;
  65
  66     t = pa_tagstruct_new(NULL, 0);
  67     pa_tagstruct_putu32(t, PA_COMMAND_SUBSCRIBE);
  68     pa_tagstruct_putu32(t, tag = c->ctag++);
  69     pa_tagstruct_putu32(t, m);
  70     pa_pstream_send_tagstruct(c->pstream, t);
  71     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, o);
  72
  73     return pa_operation_ref(o);
  74 }
  75
  76 void pa_context_set_subscribe_callback(struct pa_context *c, void (*cb)(struct pa_context *c, enum pa_subscription_event_type t, uint32_t index, void *userdata), void *userdata) {
  77     assert(c);
  78     c->subscribe_callback = cb;
  79     c->subscribe_userdata = userdata;
  80 }