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/* PipeWire
* Copyright (C) 2015 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __PIPEWIRE_LINK_H__
#define __PIPEWIRE_LINK_H__
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/ringbuffer.h>
#include <pipewire/client/mem.h>
#include <pipewire/server/core.h>
#include <pipewire/server/port.h>
#include <pipewire/server/main-loop.h>
/** \page page_link Link
*
* \section page_link_overview Overview
*
* A link is the connection between 2 nodes (\ref page_node). Nodes are
* linked together on ports.
*
* The link is responsible for negotiating the format and buffers for
* the nodes.
*/
/** \class pw_link
*
* PipeWire link interface.
*/
struct pw_link {
struct pw_core *core; /**< core object */
struct spa_list link; /**< link in core link_list */
struct pw_global *global; /**< global for this link */
struct pw_properties *properties; /**< extra link properties */
struct pw_link_info info; /**< introspectable link info */
enum pw_link_state state; /**< link state */
char *error; /**< error message when state error */
/** Emited when the link state changed */
PW_SIGNAL(state_changed, (struct pw_listener *listener,
struct pw_link *link,
enum pw_link_state old, enum pw_link_state state));
/** Emited when the link is destroyed */
PW_SIGNAL(destroy_signal, (struct pw_listener *, struct pw_link *));
/** Emited when the object is freed */
PW_SIGNAL(free_signal, (struct pw_listener *, struct pw_link *));
struct spa_list resource_list; /**< list of bound resources */
struct pw_port *output; /**< output port */
struct spa_list output_link; /**< link in output port links */
struct pw_port *input; /**< input port */
struct spa_list input_link; /**< link in input port links */
/** Emited when the port is unlinked */
PW_SIGNAL(port_unlinked, (struct pw_listener *listener,
struct pw_link *link, struct pw_port *port));
struct {
struct pw_port *input;
struct pw_port *output;
struct spa_list input_link;
struct spa_list output_link;
} rt;
};
struct pw_link *
pw_link_new(struct pw_core *core,
struct pw_port *output,
struct pw_port *input,
struct spa_format *format_filter,
struct pw_properties *properties);
void
pw_link_destroy(struct pw_link *link);
bool
pw_link_activate(struct pw_link *link);
bool
pw_link_deactivate(struct pw_link *link);
#ifdef __cplusplus
}
#endif
#endif /* __PIPEWIRE_LINK_H__ */
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