gstreamer/gst-libs/gst/gl/gstglsyncmeta.h

/*
 * GStreamer
 * Copyright (C) 2014 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_GL_SYNC_META_H__
#define __GST_GL_SYNC_META_H__

#include <gst/gl/gstgl_fwd.h>

G_BEGIN_DECLS

#define GST_GL_SYNC_META_API_TYPE (gst_gl_sync_meta_api_get_type())
#define GST_GL_SYNC_META_INFO     (gst_gl_sync_meta_get_info())
typedef struct _GstGLSyncMeta GstGLSyncMeta;

/**
 * GST_BUFFER_POOL_OPTION_GL_SYNC_META:
 *
 * An option that can be activated on bufferpools to request OpenGL
 * synchronization metadata on buffers from the pool.
 */
#define GST_BUFFER_POOL_OPTION_GL_SYNC_META "GstBufferPoolOptionGLSyncMeta"

/**
 * GstGLSyncMeta:
 * @parent: the parent #GstMeta
 * @context: the #GstGLContext used to allocate the meta
 * @data: a custom data pointer for the implementation
 * @set_sync: set a sync point in the OpenGL command stream
 * @set_sync_gl: the same as @set_sync but called from @context's thread
 * @wait: execute a wait on the previously set sync point into the OpenGL command stream
 * @wait_gl: the same as @wait but called from @context's thread
 * @wait_cpu: wait for the previously set sync point to pass from the CPU
 * @wait_cpu_gl: the same as @wait_cpu but called from @context's thread
 * @copy: copy @data into a new #GstGLSyncMeta
 * @free: free @data
 * @free_gl: free @data in @context's thread
 */
struct _GstGLSyncMeta
{
  GstMeta parent;

  GstGLContext *context;

  gpointer      data;

  void (*set_sync) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*set_sync_gl) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*wait) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*wait_gl) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*wait_cpu) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*wait_cpu_gl) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*copy) (GstGLSyncMeta * src, GstBuffer * sbuffer, GstGLSyncMeta * dest, GstBuffer * dbuffer);
  void (*free) (GstGLSyncMeta * sync, GstGLContext * context);
  void (*free_gl) (GstGLSyncMeta * sync, GstGLContext * context);
};

GST_EXPORT
GType gst_gl_sync_meta_api_get_type (void);
GST_EXPORT
const GstMetaInfo * gst_gl_sync_meta_get_info (void);

#define gst_buffer_get_gl_sync_meta(b) ((GstGLSyncMeta*)gst_buffer_get_meta((b),GST_GL_SYNC_META_API_TYPE))

GST_EXPORT
GstGLSyncMeta *     gst_buffer_add_gl_sync_meta         (GstGLContext * context, GstBuffer *buffer);
GST_EXPORT
GstGLSyncMeta *     gst_buffer_add_gl_sync_meta_full    (GstGLContext * context, GstBuffer * buffer,
                                                         gpointer data);
GST_EXPORT
void                gst_gl_sync_meta_set_sync_point     (GstGLSyncMeta * sync_meta, GstGLContext * context);
GST_EXPORT
void                gst_gl_sync_meta_wait               (GstGLSyncMeta * sync_meta, GstGLContext * context);
GST_EXPORT
void                gst_gl_sync_meta_wait_cpu           (GstGLSyncMeta * sync_meta, GstGLContext * context);

G_END_DECLS

#endif /* __GST_GL_SYNC_META_H__ */