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
32void 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
55finish:
56    pa_context_unref(c);
57}
58
59pa_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
79void 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