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 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 <stdio.h>
  28
  29 #include "polyplib-subscribe.h"
  30 #include "polyplib-internal.h"
  31 #include "pstream-util.h"
  32 #include "gccmacro.h"
  33
  34 void pa_command_subscribe_event(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
  35     pa_context *c = userdata;
  36     pa_subscription_event_type_t e;
  37     uint32_t index;
  38     assert(pd && command == PA_COMMAND_SUBSCRIBE_EVENT && t && c);
  39
  40     pa_context_ref(c);
  41
  42     if (pa_tagstruct_getu32(t, &e) < 0 ||
  43         pa_tagstruct_getu32(t, &index) < 0 ||
  44         !pa_tagstruct_eof(t)) {
  45         pa_context_fail(c, PA_ERROR_PROTOCOL);
  46         goto finish;
  47     }
  48
  49     if (c->subscribe_callback)
  50         c->subscribe_callback(c, e, index, c->subscribe_userdata);
  51
  52 finish:
  53     pa_context_unref(c);
  54 }
  55
  56
  57 pa_operation* pa_context_subscribe(pa_context *c, pa_subscription_mask_t m, void (*cb)(pa_context *c, int success, void *userdata), void *userdata) {
  58     pa_operation *o;
  59     pa_tagstruct *t;
  60     uint32_t tag;
  61     assert(c);
  62
  63     o = pa_operation_new(c, NULL);
  64     o->callback = (pa_operation_callback) cb;
  65     o->userdata = userdata;
  66
  67     t = pa_tagstruct_new(NULL, 0);
  68     pa_tagstruct_putu32(t, PA_COMMAND_SUBSCRIBE);
  69     pa_tagstruct_putu32(t, tag = c->ctag++);
  70     pa_tagstruct_putu32(t, m);
  71     pa_pstream_send_tagstruct(c->pstream, t);
  72     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, o);
  73
  74     return pa_operation_ref(o);
  75 }
  76
  77 void pa_context_set_subscribe_callback(pa_context *c, void (*cb)(pa_context *c, pa_subscription_event_type_t t, uint32_t index, void *userdata), void *userdata) {
  78     assert(c);
  79     c->subscribe_callback = cb;
  80     c->subscribe_userdata = userdata;
  81 }