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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29
  30 #include <pulse/gccmacro.h>
  31
  32 #include <pulsecore/macro.h>
  33 #include <pulsecore/pstream-util.h>
  34
  35 #include "internal.h"
  36
  37 #include "subscribe.h"
  38
  39 void pa_command_subscribe_event(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
  40     pa_context *c = userdata;
  41     pa_subscription_event_type_t e;
  42     uint32_t idx;
  43
  44     pa_assert(pd);
  45     pa_assert(command == PA_COMMAND_SUBSCRIBE_EVENT);
  46     pa_assert(t);
  47     pa_assert(c);
  48     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  49
  50     pa_context_ref(c);
  51
  52     if (pa_tagstruct_getu32(t, &e) < 0 ||
  53         pa_tagstruct_getu32(t, &idx) < 0 ||
  54         !pa_tagstruct_eof(t)) {
  55         pa_context_fail(c, PA_ERR_PROTOCOL);
  56         goto finish;
  57     }
  58
  59     if (c->subscribe_callback)
  60         c->subscribe_callback(c, e, idx, c->subscribe_userdata);
  61
  62 finish:
  63     pa_context_unref(c);
  64 }
  65
  66
  67 pa_operation* pa_context_subscribe(pa_context *c, pa_subscription_mask_t m, pa_context_success_cb_t cb, void *userdata) {
  68     pa_operation *o;
  69     pa_tagstruct *t;
  70     uint32_t tag;
  71
  72     pa_assert(c);
  73     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  74
  75     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
  76
  77     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
  78
  79     t = pa_tagstruct_command(c, PA_COMMAND_SUBSCRIBE, &tag);
  80     pa_tagstruct_putu32(t, m);
  81     pa_pstream_send_tagstruct(c->pstream, t);
  82     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
  83
  84     return o;
  85 }
  86
  87 void pa_context_set_subscribe_callback(pa_context *c, pa_context_subscribe_cb_t cb, void *userdata) {
  88     pa_assert(c);
  89     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  90
  91     if (c->state == PA_CONTEXT_TERMINATED || c->state == PA_CONTEXT_FAILED)
  92         return;
  93
  94     c->subscribe_callback = cb;
  95     c->subscribe_userdata = userdata;
  96 }