mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-02 12:45:51 +00:00
09141c6e1f
Since we started depending on GLib 2.44, we can be sure this macro is defined (it will be a no-op on compilers that don't support it). For plugins we should just start using `G_DECLARE_FINAL_TYPE` which means we no longer need the macro there, but for most types in core we don't want to break ABI, which means it's better to just keep it like it is (and use the `#ifdef` instead).
132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/* GStreamer
|
|
* Copyright (C) 2017 Matthew Waters <matthew@centricular.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 __GST_PROMISE_H__
|
|
#define __GST_PROMISE_H__
|
|
|
|
#include <gst/gst.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
GST_API
|
|
GType gst_promise_get_type(void);
|
|
#define GST_TYPE_PROMISE (gst_promise_get_type())
|
|
#define GST_PROMISE(obj) ((GstPromise *) obj)
|
|
|
|
typedef struct _GstPromise GstPromise;
|
|
|
|
/**
|
|
* GstPromiseResult:
|
|
* @GST_PROMISE_RESULT_PENDING: Initial state. Waiting for transition to any
|
|
* other state.
|
|
* @GST_PROMISE_RESULT_INTERRUPTED: Interrupted by the consumer as it doesn't
|
|
* want the value anymore.
|
|
* @GST_PROMISE_RESULT_REPLIED: A producer marked a reply
|
|
* @GST_PROMISE_RESULT_EXPIRED: The promise expired (the carrying object
|
|
* lost all refs) and the promise will never be fulfilled.
|
|
*
|
|
* The result of a #GstPromise
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
typedef enum
|
|
{
|
|
GST_PROMISE_RESULT_PENDING,
|
|
GST_PROMISE_RESULT_INTERRUPTED,
|
|
GST_PROMISE_RESULT_REPLIED,
|
|
GST_PROMISE_RESULT_EXPIRED,
|
|
} GstPromiseResult;
|
|
|
|
/**
|
|
* GstPromiseChangeFunc:
|
|
* @promise: a #GstPromise
|
|
* @user_data: (closure): user data
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
typedef void (*GstPromiseChangeFunc) (GstPromise * promise, gpointer user_data);
|
|
|
|
/**
|
|
* GstPromise:
|
|
* @parent: parent #GstMiniObject
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
struct _GstPromise
|
|
{
|
|
GstMiniObject parent;
|
|
};
|
|
|
|
GST_API
|
|
GstPromise * gst_promise_new (void);
|
|
GST_API
|
|
GstPromise * gst_promise_new_with_change_func (GstPromiseChangeFunc func,
|
|
gpointer user_data,
|
|
GDestroyNotify notify);
|
|
|
|
GST_API
|
|
GstPromiseResult gst_promise_wait (GstPromise * promise);
|
|
GST_API
|
|
void gst_promise_reply (GstPromise * promise,
|
|
GstStructure * s);
|
|
GST_API
|
|
void gst_promise_interrupt (GstPromise * promise);
|
|
GST_API
|
|
void gst_promise_expire (GstPromise * promise);
|
|
|
|
GST_API
|
|
const GstStructure * gst_promise_get_reply (GstPromise * promise);
|
|
|
|
/**
|
|
* gst_promise_ref:
|
|
* @promise: a #GstPromise.
|
|
*
|
|
* Increases the refcount of the given @promise by one.
|
|
*
|
|
* Returns: (transfer full): @promise
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
static inline GstPromise *
|
|
gst_promise_ref (GstPromise * promise)
|
|
{
|
|
return (GstPromise *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (promise));
|
|
}
|
|
|
|
/**
|
|
* gst_promise_unref:
|
|
* @promise: (transfer full): a #GstPromise.
|
|
*
|
|
* Decreases the refcount of the promise. If the refcount reaches 0, the
|
|
* promise will be freed.
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
static inline void
|
|
gst_promise_unref (GstPromise * promise)
|
|
{
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (promise));
|
|
}
|
|
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstPromise, gst_promise_unref)
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_PROMISE_H__ */
|