/** \defgroup pw_context Context * * \brief The PipeWire context object manages all locally available * resources. It is used by both clients and servers. * * The context is used to: * * - Load modules and extend the functionality. This includes * extending the protocol with new object types or creating * any of the available objects. * * - Create implementations of various objects like nodes, * devices, factories, modules, etc.. This will usually also * create pw_global objects that can then be shared with * clients. * * - Connect to another PipeWire instance (the main daemon, for * example) and interact with it (See \ref page_core_api). * * - Export a local implementation of an object to another * instance.
*/
/** context events emitted by the context object added with \ref pw_context_add_listener */ struct pw_context_events { #define PW_VERSION_CONTEXT_EVENTS 0
uint32_t version;
/** The context is being destroyed */ void (*destroy) (void *data); /** The context is being freed */ void (*free) (void *data); /** a new client object is added */ void (*check_access) (void *data, struct pw_impl_client *client); /** a new global object was added */ void (*global_added) (void *data, struct pw_global *global); /** a global object was removed */ void (*global_removed) (void *data, struct pw_global *global);
};
/** Make a new context object for a given main_loop. Ownership of the properties is taken */ struct pw_context * pw_context_new(struct pw_loop *main_loop, /**< a main loop to run in */ struct pw_properties *props, /**< extra properties */
size_t user_data_size /**< extra user data size */);
/** destroy a context object, all resources except the main_loop will be destroyed */ void pw_context_destroy(struct pw_context *context);
/** Get the context user data */ void *pw_context_get_user_data(struct pw_context *context);
/** Add a new event listener to a context */ void pw_context_add_listener(struct pw_context *context, struct spa_hook *listener, conststruct pw_context_events *events, void *data);
/** Get the context properties */ conststruct pw_properties *pw_context_get_properties(struct pw_context *context);
/** Update the context properties */ int pw_context_update_properties(struct pw_context *context, conststruct spa_dict *dict);
/** Get a config section for this context. Since 0.3.22, deprecated,
* use pw_context_conf_section_for_each(). */ constchar *pw_context_get_conf_section(struct pw_context *context, constchar *section); /** Parse a standard config section for this context. Since 0.3.22 */ int pw_context_parse_conf_section(struct pw_context *context, struct pw_properties *conf, constchar *section);
/** update properties from a section into props. Since 0.3.45 */ int pw_context_conf_update_props(struct pw_context *context, constchar *section, struct pw_properties *props); /** emit callback for all config sections. Since 0.3.45 */ int pw_context_conf_section_for_each(struct pw_context *context, constchar *section, int (*callback) (void *data, constchar *location, constchar *section, constchar *str, size_t len), void *data); /** emit callback for all matched properties. Since 0.3.46 */ int pw_context_conf_section_match_rules(struct pw_context *context, constchar *section, conststruct spa_dict *props, int (*callback) (void *data, constchar *location, constchar *action, constchar *str, size_t len), void *data);
/** Get the context support objects */ conststruct spa_support *pw_context_get_support(struct pw_context *context, uint32_t *n_support);
/** get the context main loop */ struct pw_loop *pw_context_get_main_loop(struct pw_context *context);
/** Get the work queue from the context: Since 0.3.26 */ struct pw_work_queue *pw_context_get_work_queue(struct pw_context *context);
/** Iterate the globals of the context. The callback should return * 0 to fetch the next item, any other value stops the iteration and returns * the value. When all callbacks return 0, this function returns 0 when all
* globals are iterated. */ int pw_context_for_each_global(struct pw_context *context, int (*callback) (void *data, struct pw_global *global), void *data);
/** Find a context global by id */ struct pw_global *pw_context_find_global(struct pw_context *context, /**< the context */
uint32_t id /**< the global id */);
/** add a spa library for the given factory_name regex */ int pw_context_add_spa_lib(struct pw_context *context, constchar *factory_regex, constchar *lib);
/** find the library name for a spa factory */ constchar * pw_context_find_spa_lib(struct pw_context *context, constchar *factory_name);
/** register a type that can be exported on a context_proxy. This is usually used by
* extension modules */ int pw_context_register_export_type(struct pw_context *context, struct pw_export_type *type); /** find information about registered export type */ conststruct pw_export_type *pw_context_find_export_type(struct pw_context *context, constchar *type);
/** add an object to the context */ int pw_context_set_object(struct pw_context *context, constchar *type, void *value); /** get an object from the context */ void *pw_context_get_object(struct pw_context *context, constchar *type);
/** * \}
*/ #ifdef __cplusplus
} #endif
#endif/* PIPEWIRE_CONTEXT_H */
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