30#define PW_TYPE_INTERFACE_Node PW_TYPE_INFO_INTERFACE_BASE "Node"
32#define PW_NODE_PERM_MASK PW_PERM_RWXML
34#define PW_VERSION_NODE 3
56#define PW_NODE_CHANGE_MASK_INPUT_PORTS (1 << 0)
57#define PW_NODE_CHANGE_MASK_OUTPUT_PORTS (1 << 1)
58#define PW_NODE_CHANGE_MASK_STATE (1 << 2)
59#define PW_NODE_CHANGE_MASK_PROPS (1 << 3)
60#define PW_NODE_CHANGE_MASK_PARAMS (1 << 4)
61#define PW_NODE_CHANGE_MASK_ALL ((1 << 5)-1)
83#define PW_NODE_EVENT_INFO 0
84#define PW_NODE_EVENT_PARAM 1
85#define PW_NODE_EVENT_NUM 2
89#define PW_VERSION_NODE_EVENTS 0
108 void (*param) (
void *data,
int seq,
109 uint32_t id, uint32_t index, uint32_t next,
113#define PW_NODE_METHOD_ADD_LISTENER 0
114#define PW_NODE_METHOD_SUBSCRIBE_PARAMS 1
115#define PW_NODE_METHOD_ENUM_PARAMS 2
116#define PW_NODE_METHOD_SET_PARAM 3
117#define PW_NODE_METHOD_SEND_COMMAND 4
118#define PW_NODE_METHOD_NUM 5
122#define PW_VERSION_NODE_METHODS 0
156 int (*
enum_params) (
void *object,
int seq, uint32_t id,
157 uint32_t start, uint32_t num,
169 int (*
set_param) (
void *object, uint32_t id, uint32_t flags,
182#define pw_node_method(o,method,version,...) \
184 int _res = -ENOTSUP; \
185 spa_interface_call_res((struct spa_interface*)o, \
186 struct pw_node_methods, _res, \
187 method, version, ##__VA_ARGS__); \
192#define pw_node_add_listener(c,...) pw_node_method(c,add_listener,0,__VA_ARGS__)
193#define pw_node_subscribe_params(c,...) pw_node_method(c,subscribe_params,0,__VA_ARGS__)
194#define pw_node_enum_params(c,...) pw_node_method(c,enum_params,0,__VA_ARGS__)
195#define pw_node_set_param(c,...) pw_node_method(c,set_param,0,__VA_ARGS__)
196#define pw_node_send_command(c,...) pw_node_method(c,send_command,0,__VA_ARGS__)
void pw_node_info_free(struct pw_node_info *info)
Definition introspect.c:233
struct pw_node_info * pw_node_info_merge(struct pw_node_info *info, const struct pw_node_info *update, bool reset)
Definition introspect.c:158
struct pw_node_info * pw_node_info_update(struct pw_node_info *info, const struct pw_node_info *update)
Definition introspect.c:226
const char * pw_node_state_as_string(enum pw_node_state state)
Convert a pw_node_state to a readable string.
Definition introspect.c:15
pw_node_state
The different node states.
Definition node.h:46
@ PW_NODE_STATE_ERROR
error state
Definition node.h:47
@ PW_NODE_STATE_SUSPENDED
the node is suspended, the device might be closed
Definition node.h:49
@ PW_NODE_STATE_IDLE
the node is running but there is no active port
Definition node.h:51
@ PW_NODE_STATE_CREATING
the node is being created
Definition node.h:48
@ PW_NODE_STATE_RUNNING
the node is running
Definition node.h:53
Node events.
Definition node.h:105
void(* info)(void *data, const struct pw_node_info *info)
Notify node info.
Definition node.h:114
uint32_t version
Definition node.h:108
void(* param)(void *data, int seq, uint32_t id, uint32_t index, uint32_t next, const struct spa_pod *param)
Notify a node param.
Definition node.h:126
The node information.
Definition node.h:60
enum pw_node_state state
the current state of the node
Definition node.h:79
uint32_t max_input_ports
maximum number of inputs
Definition node.h:62
const char * error
an error reason if state is error
Definition node.h:80
uint32_t id
id of the global
Definition node.h:61
uint64_t change_mask
bitfield of changed fields since last call
Definition node.h:76
struct spa_param_info * params
parameters
Definition node.h:82
uint32_t n_output_ports
number of outputs
Definition node.h:78
uint32_t max_output_ports
maximum number of outputs
Definition node.h:63
uint32_t n_params
number of items in params
Definition node.h:83
uint32_t n_input_ports
number of inputs
Definition node.h:77
Node methods.
Definition node.h:145
int(* add_listener)(void *object, struct spa_hook *listener, const struct pw_node_events *events, void *data)
Definition node.h:150
int(* set_param)(void *object, uint32_t id, uint32_t flags, const struct spa_pod *param)
Set a parameter on the node.
Definition node.h:194
int(* enum_params)(void *object, int seq, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter)
Enumerate node parameters.
Definition node.h:181
uint32_t version
Definition node.h:148
int(* subscribe_params)(void *object, uint32_t *ids, uint32_t n_ids)
Subscribe to parameter changes.
Definition node.h:165
int(* send_command)(void *object, const struct spa_command *command)
Send a command to the node.
Definition node.h:204
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:350
information about a parameter
Definition param.h:51