code.delx.au - pulseaudio/blob - src/polyp/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 <polypcore/gccmacro.h>
  30 #include <polypcore/pstream-util.h>
  31
  32 #include "internal.h"
  33
  34 #include "subscribe.h"
  35
  36 void pa_command_subscribe_event(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
  37     pa_context *c = userdata;
  38     pa_subscription_event_type_t e;
  39     uint32_t index;
  40
  41     assert(pd);
  42     assert(command == PA_COMMAND_SUBSCRIBE_EVENT);
  43     assert(t);
  44     assert(c);
  45
  46     pa_context_ref(c);
  47
  48     if (pa_tagstruct_getu32(t, &e) < 0 ||
  49         pa_tagstruct_getu32(t, &index) < 0 ||
  50         !pa_tagstruct_eof(t)) {
  51         pa_context_fail(c, PA_ERR_PROTOCOL);
  52         goto finish;
  53     }
  54
  55     if (c->subscribe_callback)
  56         c->subscribe_callback(c, e, index, c->subscribe_userdata);
  57
  58 finish:
  59     pa_context_unref(c);
  60 }
  61
  62
  63 pa_operation* pa_context_subscribe(pa_context *c, pa_subscription_mask_t m, pa_context_success_cb_t cb, void *userdata) {
  64     pa_operation *o;
  65     pa_tagstruct *t;
  66     uint32_t tag;
  67
  68     assert(c);
  69     assert(c->ref >= 1);
  70
  71     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
  72
  73     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
  74
  75     t = pa_tagstruct_new(NULL, 0);
  76     pa_tagstruct_putu32(t, PA_COMMAND_SUBSCRIBE);
  77     pa_tagstruct_putu32(t, tag = c->ctag++);
  78     pa_tagstruct_putu32(t, m);
  79     pa_pstream_send_tagstruct(c->pstream, t);
  80     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o));
  81
  82     return o;
  83 }
  84
  85 void pa_context_set_subscribe_callback(pa_context *c, pa_context_subscribe_cb_t cb, void *userdata) {
  86     assert(c);
  87     assert(c->ref >= 1);
  88
  89     c->subscribe_callback = cb;
  90     c->subscribe_userdata = userdata;
  91 }