PipeWire  0.3.66
spa/include/spa/node/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_NODE_UTILS_H
6 #define SPA_NODE_UTILS_H
7 
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11 
17 #include <spa/pod/builder.h>
18 
19 #include <spa/node/node.h>
20 
22  struct spa_pod_builder *builder;
24 };
25 
26 static inline void spa_result_func_node_params(void *data,
27  int seq, int res, uint32_t type, const void *result)
28 {
29  struct spa_result_node_params_data *d =
31  const struct spa_result_node_params *r =
32  (const struct spa_result_node_params *) result;
33  uint32_t offset = d->builder->state.offset;
35  return;
36  d->data.next = r->next;
37  d->data.param = spa_pod_builder_deref(d->builder, offset);
38 }
39 
40 static inline int spa_node_enum_params_sync(struct spa_node *node,
41  uint32_t id, uint32_t *index,
42  const struct spa_pod *filter,
43  struct spa_pod **param,
44  struct spa_pod_builder *builder)
45 {
47  struct spa_hook listener = {{0}};
48  static const struct spa_node_events node_events = {
50  .info = NULL,
51  .port_info = NULL,
53  };
54  int res;
55 
56  res = spa_node_add_listener(node, &listener, &node_events, &data);
57  if (res >= 0) {
58  res = spa_node_enum_params(node, 0, id, *index, 1, filter);
59  spa_hook_remove(&listener);
60  }
61 
62  if (data.data.param == NULL) {
63  if (res > 0)
64  res = 0;
65  } else {
66  *index = data.data.next;
67  *param = data.data.param;
68  res = 1;
69  }
70  return res;
71 }
72 
73 static inline int spa_node_port_enum_params_sync(struct spa_node *node,
74  enum spa_direction direction, uint32_t port_id,
75  uint32_t id, uint32_t *index,
76  const struct spa_pod *filter,
77  struct spa_pod **param,
78  struct spa_pod_builder *builder)
79 {
81  struct spa_hook listener = {{0}};
82  static const struct spa_node_events node_events = {
84  .info = NULL,
85  .port_info = NULL,
87  };
88  int res;
89 
90  res = spa_node_add_listener(node, &listener, &node_events, &data);
91  if (res >= 0) {
92  res = spa_node_port_enum_params(node, 0, direction, port_id,
93  id, *index, 1, filter);
94  spa_hook_remove(&listener);
95  }
96 
97  if (data.data.param == NULL) {
98  if (res > 0)
99  res = 0;
100  } else {
101  *index = data.data.next;
102  *param = data.data.param;
103  res = 1;
104  }
105  return res;
106 }
107 
108 #define spa_node_emit(hooks,method,version,...) \
109  spa_hook_list_call_simple(hooks, struct spa_node_events, \
110  method, version, ##__VA_ARGS__)
111 
112 #define spa_node_emit_info(hooks,...) spa_node_emit(hooks,info, 0, __VA_ARGS__)
113 #define spa_node_emit_port_info(hooks,...) spa_node_emit(hooks,port_info, 0, __VA_ARGS__)
114 #define spa_node_emit_result(hooks,...) spa_node_emit(hooks,result, 0, __VA_ARGS__)
115 #define spa_node_emit_event(hooks,...) spa_node_emit(hooks,event, 0, __VA_ARGS__)
116 
117 
118 #define spa_node_call(callbacks,method,version,...) \
119 ({ \
120  int _res = -ENOTSUP; \
121  spa_callbacks_call_res(callbacks, struct spa_node_callbacks, \
122  _res, method, version, ##__VA_ARGS__); \
123  _res; \
124 })
125 
126 #define spa_node_call_ready(hook,...) spa_node_call(hook, ready, 0, __VA_ARGS__)
127 #define spa_node_call_reuse_buffer(hook,...) spa_node_call(hook, reuse_buffer, 0, __VA_ARGS__)
128 #define spa_node_call_xrun(hook,...) spa_node_call(hook, xrun, 0, __VA_ARGS__)
129 
134 #ifdef __cplusplus
135 } /* extern "C" */
136 #endif
137 
138 #endif /* SPA_NODE_UTILS_H */
spa/pod/builder.h
static void spa_hook_remove(struct spa_hook *hook)
Remove a hook.
Definition: hook.h:372
static void spa_result_func_node_params(void *data, int seq, int res, uint32_t type, const void *result)
Definition: spa/include/spa/node/utils.h:31
static int spa_node_enum_params_sync(struct spa_node *node, uint32_t id, uint32_t *index, const struct spa_pod *filter, struct spa_pod **param, struct spa_pod_builder *builder)
Definition: spa/include/spa/node/utils.h:45
#define spa_node_add_listener(n,...)
Adds an event listener on node.
Definition: spa/include/spa/node/node.h:701
#define spa_node_port_enum_params(n,...)
Enumerate all possible parameters of id on port_id of node that are compatible with filter.
Definition: spa/include/spa/node/node.h:728
static int spa_node_port_enum_params_sync(struct spa_node *node, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t *index, const struct spa_pod *filter, struct spa_pod **param, struct spa_pod_builder *builder)
Definition: spa/include/spa/node/utils.h:78
#define spa_node_enum_params(n,...)
Enumerate the parameters of a node.
Definition: spa/include/spa/node/node.h:710
#define SPA_VERSION_NODE_EVENTS
Definition: spa/include/spa/node/node.h:178
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/pod.h:30
static struct spa_pod * spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
Definition: builder.h:93
spa_direction
Definition: defs.h:88
spa/node/node.h
A hook, contains the structure with functions and the data passed to the functions.
Definition: hook.h:331
events from the spa_node.
Definition: spa/include/spa/node/node.h:176
uint32_t version
version of this structure
Definition: spa/include/spa/node/node.h:179
Definition: spa/include/spa/node/node.h:41
uint32_t offset
Definition: builder.h:33
Definition: builder.h:53
struct spa_pod_builder_state state
Definition: builder.h:57
Definition: pod/pod.h:43
Definition: spa/include/spa/node/utils.h:26
struct spa_result_node_params data
Definition: spa/include/spa/node/utils.h:28
struct spa_pod_builder * builder
Definition: spa/include/spa/node/utils.h:27
the result of enum_params or port_enum_params.
Definition: spa/include/spa/node/node.h:152
struct spa_pod * param
the result param
Definition: spa/include/spa/node/node.h:156
uint32_t next
next index of iteration
Definition: spa/include/spa/node/node.h:155
uint32_t index
index of parameter
Definition: spa/include/spa/node/node.h:154