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 
   37#ifndef PW_API_NODE_IMPL 
   38#define PW_API_NODE_IMPL static inline 
   60#define PW_NODE_CHANGE_MASK_INPUT_PORTS         (1 << 0) 
   61#define PW_NODE_CHANGE_MASK_OUTPUT_PORTS        (1 << 1) 
   62#define PW_NODE_CHANGE_MASK_STATE               (1 << 2) 
   63#define PW_NODE_CHANGE_MASK_PROPS               (1 << 3) 
   64#define PW_NODE_CHANGE_MASK_PARAMS              (1 << 4) 
   65#define PW_NODE_CHANGE_MASK_ALL                 ((1 << 5)-1) 
   87#define PW_NODE_EVENT_INFO      0 
   88#define PW_NODE_EVENT_PARAM     1 
   89#define PW_NODE_EVENT_NUM       2 
 
   93#define PW_VERSION_NODE_EVENTS  0 
  100        void (*info) (
void *data, 
const struct pw_node_info *info);
 
  112        void (*param) (
void *data, 
int seq,
 
  113                      uint32_t 
id, uint32_t index, uint32_t next,
 
  117#define PW_NODE_METHOD_ADD_LISTENER     0 
  118#define PW_NODE_METHOD_SUBSCRIBE_PARAMS 1 
  119#define PW_NODE_METHOD_ENUM_PARAMS      2 
  120#define PW_NODE_METHOD_SET_PARAM        3 
  121#define PW_NODE_METHOD_SEND_COMMAND     4 
  122#define PW_NODE_METHOD_NUM              5 
  126#define PW_VERSION_NODE_METHODS         0 
 
  161                        uint32_t start, uint32_t num,
 
  173        int (*
set_param) (
void *object, uint32_t 
id, uint32_t flags,
 
  196                        listener, events, data);
 
  209                int seq, uint32_t 
id, uint32_t start, uint32_t num,
 
 
  214                        seq, 
id, start, num, filter);
 
uint32_t int seq
Definition core.h:432
uint32_t id
Definition core.h:432
PW_API_NODE_IMPL int pw_node_subscribe_params(struct pw_node *object, uint32_t *ids, uint32_t n_ids)
Subscribe to parameter changes.
Definition node.h:226
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
#define PW_API_NODE_IMPL
Definition node.h:47
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:51
PW_API_NODE_IMPL int pw_node_send_command(struct pw_node *object, const struct spa_command *command)
Send a command to the node.
Definition node.h:253
PW_API_NODE_IMPL int pw_node_add_listener(struct pw_node *object, struct spa_hook *listener, const struct pw_node_events *events, void *data)
Definition node.h:215
PW_API_NODE_IMPL int pw_node_set_param(struct pw_node *object, uint32_t id, uint32_t flags, const struct spa_pod *param)
Set a parameter on the node.
Definition node.h:244
PW_API_NODE_IMPL int pw_node_enum_params(struct pw_node *object, int seq, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter)
Enumerate node parameters.
Definition node.h:234
@ PW_NODE_STATE_ERROR
error state
Definition node.h:52
@ PW_NODE_STATE_SUSPENDED
the node is suspended, the device might be closed
Definition node.h:54
@ PW_NODE_STATE_IDLE
the node is running but there is no active port
Definition node.h:56
@ PW_NODE_STATE_CREATING
the node is being created
Definition node.h:53
@ PW_NODE_STATE_RUNNING
the node is running
Definition node.h:58
#define spa_api_method_r(rtype, def, type, o, method, version,...)
Definition hook.h:291
Node events.
Definition node.h:110
uint32_t version
Definition node.h:113
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:131
The node information.
Definition node.h:65
enum pw_node_state state
the current state of the node
Definition node.h:84
uint32_t max_input_ports
maximum number of inputs
Definition node.h:67
uint64_t change_mask
bitfield of changed fields since last call
Definition node.h:81
struct spa_param_info * params
parameters
Definition node.h:87
uint32_t n_output_ports
number of outputs
Definition node.h:83
uint32_t max_output_ports
maximum number of outputs
Definition node.h:68
uint32_t n_params
number of items in params
Definition node.h:88
uint32_t n_input_ports
number of inputs
Definition node.h:82
Node methods.
Definition node.h:150
int(* add_listener)(void *object, struct spa_hook *listener, const struct pw_node_events *events, void *data)
Definition node.h:155
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:199
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:186
int(* subscribe_params)(void *object, uint32_t *ids, uint32_t n_ids)
Subscribe to parameter changes.
Definition node.h:170
int(* send_command)(void *object, const struct spa_command *command)
Send a command to the node.
Definition node.h:209
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:427
information about a parameter
Definition param.h:51