1 /***
2 This file is part of PulseAudio.
3
4 Copyright 2004-2006 Lennart Poettering
5
6 PulseAudio 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 2.1 of the License,
9 or (at your option) any later version.
10
11 PulseAudio 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 PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <stdio.h>
25
26 #include <pulsecore/macro.h>
27 #include <pulsecore/pstream-util.h>
28
29 #include "internal.h"
30 #include "subscribe.h"
31
pa_command_subscribe_event(pa_pdispatch * pd,uint32_t command,uint32_t tag,pa_tagstruct * t,void * userdata)32 void pa_command_subscribe_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
33 pa_context *c = userdata;
34 pa_subscription_event_type_t e;
35 uint32_t idx;
36
37 pa_assert(pd);
38 pa_assert(command == PA_COMMAND_SUBSCRIBE_EVENT);
39 pa_assert(t);
40 pa_assert(c);
41 pa_assert(PA_REFCNT_VALUE(c) >= 1);
42
43 pa_context_ref(c);
44
45 if (pa_tagstruct_getu32(t, &e) < 0 ||
46 pa_tagstruct_getu32(t, &idx) < 0 ||
47 !pa_tagstruct_eof(t)) {
48 pa_context_fail(c, PA_ERR_PROTOCOL);
49 goto finish;
50 }
51
52 if (c->subscribe_callback)
53 c->subscribe_callback(c, e, idx, c->subscribe_userdata);
54
55 finish:
56 pa_context_unref(c);
57 }
58
pa_context_subscribe(pa_context * c,pa_subscription_mask_t m,pa_context_success_cb_t cb,void * userdata)59 pa_operation* pa_context_subscribe(pa_context *c, pa_subscription_mask_t m, pa_context_success_cb_t cb, void *userdata) {
60 pa_operation *o;
61 pa_tagstruct *t;
62 uint32_t tag;
63
64 pa_assert(c);
65 pa_assert(PA_REFCNT_VALUE(c) >= 1);
66
67 PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
68
69 o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
70
71 t = pa_tagstruct_command(c, PA_COMMAND_SUBSCRIBE, &tag);
72 pa_tagstruct_putu32(t, m);
73 pa_pstream_send_tagstruct(c->pstream, t);
74 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);
75
76 return o;
77 }
78
pa_context_set_subscribe_callback(pa_context * c,pa_context_subscribe_cb_t cb,void * userdata)79 void pa_context_set_subscribe_callback(pa_context *c, pa_context_subscribe_cb_t cb, void *userdata) {
80 pa_assert(c);
81 pa_assert(PA_REFCNT_VALUE(c) >= 1);
82
83 if (c->state == PA_CONTEXT_TERMINATED || c->state == PA_CONTEXT_FAILED)
84 return;
85
86 c->subscribe_callback = cb;
87 c->subscribe_userdata = userdata;
88 }
89