PipeWire 1.2.5
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utils.h
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1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2019 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_DEVICE_UTILS_H
6#define SPA_DEVICE_UTILS_H
7
8#ifdef __cplusplus
9extern "C" {
10#endif
11
12#include <spa/pod/builder.h>
13#include <spa/monitor/device.h>
14
22 struct spa_result_device_params data;
23};
24
25static inline void spa_result_func_device_params(void *data, int seq SPA_UNUSED, int res SPA_UNUSED,
26 uint32_t type SPA_UNUSED, const void *result)
29 (struct spa_result_device_params_data *)data;
30 const struct spa_result_device_params *r =
31 (const struct spa_result_device_params *)result;
32 uint32_t offset = d->builder->state.offset;
34 return;
35 d->data.next = r->next;
36 d->data.param = spa_pod_builder_deref(d->builder, offset);
37}
38
39static inline int spa_device_enum_params_sync(struct spa_device *device,
40 uint32_t id, uint32_t *index,
41 const struct spa_pod *filter,
42 struct spa_pod **param,
43 struct spa_pod_builder *builder)
45 struct spa_result_device_params_data data = { builder, {0}};
46 struct spa_hook listener = {{0}, {0}, 0, 0};
47 static const struct spa_device_events device_events = {
49 .info = NULL,
51 };
52 int res;
53
54 spa_device_add_listener(device, &listener, &device_events, &data);
55 res = spa_device_enum_params(device, 0, id, *index, 1, filter);
56 spa_hook_remove(&listener);
57
58 if (data.data.param == NULL) {
59 if (res > 0)
60 res = 0;
61 } else {
62 *index = data.data.next;
63 *param = data.data.param;
64 res = 1;
65 }
66 return res;
67}
68
69#define spa_device_emit(hooks,method,version,...) \
70 spa_hook_list_call_simple(hooks, struct spa_device_events, \
71 method, version, ##__VA_ARGS__)
72
73#define spa_device_emit_info(hooks,i) spa_device_emit(hooks,info, 0, i)
74#define spa_device_emit_result(hooks,s,r,t,res) spa_device_emit(hooks,result, 0, s, r, t, res)
75#define spa_device_emit_event(hooks,e) spa_device_emit(hooks,event, 0, e)
76#define spa_device_emit_object_info(hooks,id,i) spa_device_emit(hooks,object_info, 0, id, i)
77
82#ifdef __cplusplus
83} /* extern "C" */
84#endif
85
86#endif /* SPA_DEVICE_UTILS_H */
spa/pod/builder.h
#define spa_device_enum_params(d,...)
Enumerate the parameters of a device.
Definition device.h:268
static void spa_result_func_device_params(void *data, int seq, int res 1, uint32_t type, const void *result)
Definition utils.h:30
static 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)
Definition utils.h:44
#define SPA_VERSION_DEVICE_EVENTS
version of the structure
Definition device.h:122
#define spa_device_add_listener(d,...)
Set events to receive asynchronous notifications from the device.
Definition device.h:262
static void spa_hook_remove(struct spa_hook *hook)
Remove a hook.
Definition hook.h:391
static int spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition builder.h:160
#define SPA_POD_SIZE(pod)
Definition pod.h:30
static struct spa_pod * spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
Definition builder.h:93
#define SPA_UNUSED
Definition defs.h:307
spa/monitor/device.h
spa_device_events:
Definition device.h:119
uint32_t version
Definition device.h:123
Definition device.h:40
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:350
uint32_t offset
Definition builder.h:33
Definition builder.h:53
struct spa_pod_builder_state state
Definition builder.h:57
Definition pod.h:43
Definition utils.h:25
struct spa_result_device_params data
Definition utils.h:27
struct spa_pod_builder * builder
Definition utils.h:26
Definition device.h:96
uint32_t index
Definition device.h:98
uint32_t next
Definition device.h:99
struct spa_pod * param
Definition device.h:100