/** link events added with \ref pw_impl_link_add_listener */ struct pw_impl_link_events { #define PW_VERSION_IMPL_LINK_EVENTS 0
uint32_t version;
/** A link is destroyed */ void (*destroy) (void *data);
/** A link is freed */ void (*free) (void *data);
/** a Link is initialized */ void (*initialized) (void *data);
/** The info changed on a link */ void (*info_changed) (void *data, conststruct pw_link_info *info);
/** The link state changed, \a error is only valid when the state is
* in error. */ void (*state_changed) (void *data, enum pw_link_state old, enum pw_link_state state, constchar *error);
/** A port is unlinked */ void (*port_unlinked) (void *data, struct pw_impl_port *port);
};
/** Make a new link between two ports
* \return a newly allocated link */ struct pw_impl_link *
pw_context_create_link(struct pw_context *context, /**< the context object */ struct pw_impl_port *output, /**< an output port */ struct pw_impl_port *input, /**< an input port */ struct spa_pod *format_filter, /**< an optional format filter */ struct pw_properties *properties /**< extra properties */,
size_t user_data_size /**< extra user data size */);
/** Destroy a link */ void pw_impl_link_destroy(struct pw_impl_link *link);
/** Add an event listener to \a link */ void pw_impl_link_add_listener(struct pw_impl_link *link, struct spa_hook *listener, conststruct pw_impl_link_events *events, void *data);
/** Finish link configuration and register */ int pw_impl_link_register(struct pw_impl_link *link, /**< the link to register */ struct pw_properties *properties /**< extra properties */);
/** Get the context of a link */ struct pw_context *pw_impl_link_get_context(struct pw_impl_link *link);
/** Get the user_data of a link, the size of the memory is given when
* constructing the link */ void *pw_impl_link_get_user_data(struct pw_impl_link *link);
/** Get the link info */ conststruct pw_link_info *pw_impl_link_get_info(struct pw_impl_link *link);
/** Get the global of the link */ struct pw_global *pw_impl_link_get_global(struct pw_impl_link *link);
/** Get the output port of the link */ struct pw_impl_port *pw_impl_link_get_output(struct pw_impl_link *link);
/** Get the input port of the link */ struct pw_impl_port *pw_impl_link_get_input(struct pw_impl_link *link);
/** Find the link between 2 ports */ struct pw_impl_link *pw_impl_link_find(struct pw_impl_port *output, struct pw_impl_port *input);
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