1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/* Simple Plugin API
*
* Copyright © 2019 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef SPA_DEVICE_UTILS_H
#define SPA_DEVICE_UTILS_H
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/pod/builder.h>
#include <spa/monitor/device.h>
/**
* \addtogroup spa_device
* \{
*/
struct spa_result_device_params_data {
struct spa_pod_builder *builder;
struct spa_result_device_params data;
};
static inline void spa_result_func_device_params(void *data, int seq, int res,
uint32_t type, const void *result)
{
struct spa_result_device_params_data *d =
(struct spa_result_device_params_data *)data;
const struct spa_result_device_params *r =
(const struct spa_result_device_params *)result;
uint32_t offset = d->builder->state.offset;
if (spa_pod_builder_raw_padded(d->builder, r->param, SPA_POD_SIZE(r->param)) < 0)
return;
d->data.next = r->next;
d->data.param = spa_pod_builder_deref(d->builder, offset);
}
static inline int spa_device_enum_params_sync(struct spa_device *device,
uint32_t id, uint32_t *index,
const struct spa_pod *filter,
struct spa_pod **param,
struct spa_pod_builder *builder)
{
struct spa_result_device_params_data data = { builder, };
struct spa_hook listener = {{0}};
static const struct spa_device_events device_events = {
.version = SPA_VERSION_DEVICE_EVENTS,
.info = NULL,
.result = spa_result_func_device_params,
};
int res;
spa_device_add_listener(device, &listener, &device_events, &data);
res = spa_device_enum_params(device, 0, id, *index, 1, filter);
spa_hook_remove(&listener);
if (data.data.param == NULL) {
if (res > 0)
res = 0;
} else {
*index = data.data.next;
*param = data.data.param;
res = 1;
}
return res;
}
#define spa_device_emit(hooks,method,version,...) \
spa_hook_list_call_simple(hooks, struct spa_device_events, \
method, version, ##__VA_ARGS__)
#define spa_device_emit_info(hooks,i) spa_device_emit(hooks,info, 0, i)
#define spa_device_emit_result(hooks,s,r,t,res) spa_device_emit(hooks,result, 0, s, r, t, res)
#define spa_device_emit_event(hooks,e) spa_device_emit(hooks,event, 0, e)
#define spa_device_emit_object_info(hooks,id,i) spa_device_emit(hooks,object_info, 0, id, i)
/**
* \}
*/
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_DEVICE_UTILS_H */
|
