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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GstGLSyncMeta: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gl.html" title="OpenGL Integration Library">
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<link rel="prev" href="GstGLSLStage.html" title="GstGLSLStage">
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Description
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GstGLSyncMeta
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GstGLSyncMeta — synchronization primitives
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Functions
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const GstMetaInfo *
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gst_gl_sync_meta_get_info ()
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GstGLSyncMeta *
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gst_buffer_add_gl_sync_meta ()
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GstGLSyncMeta *
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gst_buffer_add_gl_sync_meta_full ()
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#define
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gst_buffer_get_gl_sync_meta()
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void
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gst_gl_sync_meta_set_sync_point ()
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void
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gst_gl_sync_meta_wait ()
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void
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gst_gl_sync_meta_wait_cpu ()
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Types and Values
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struct
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GstGLSyncMeta
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#define
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GST_BUFFER_POOL_OPTION_GL_SYNC_META
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Includes
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#include <gst/gl/gl.h>
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Description
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GstGLSyncMeta provides the ability to synchronize the OpenGL command stream
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with the CPU or with other OpenGL contexts.
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Functions
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gst_gl_sync_meta_get_info ()
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const GstMetaInfo *
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gst_gl_sync_meta_get_info (void);
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gst_buffer_add_gl_sync_meta ()
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GstGLSyncMeta *
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gst_buffer_add_gl_sync_meta (GstGLContext *context,
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GstBuffer *buffer);
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Parameters
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context
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a GstGLContext
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buffer
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a GstBuffer
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Returns
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the GstGLSyncMeta added to GstBuffer.
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[transfer none]
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Since: 1.6
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gst_buffer_add_gl_sync_meta_full ()
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GstGLSyncMeta *
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gst_buffer_add_gl_sync_meta_full (GstGLContext *context,
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GstBuffer *buffer,
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gpointer data);
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Parameters
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context
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a GstGLContext
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buffer
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a GstBuffer
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data
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sync data to hold
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Returns
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the GstGLSyncMeta added to GstBuffer.
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[transfer none]
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Since: 1.8
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gst_buffer_get_gl_sync_meta()
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#define gst_buffer_get_gl_sync_meta(b) ((GstGLSyncMeta*)gst_buffer_get_meta((b),GST_GL_SYNC_META_API_TYPE))
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gst_gl_sync_meta_set_sync_point ()
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void
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gst_gl_sync_meta_set_sync_point (GstGLSyncMeta *sync_meta,
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GstGLContext *context);
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Set a sync point to possibly wait on at a later time.
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Parameters
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sync_meta
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a GstGLSyncMeta
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context
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a GstGLContext
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Since: 1.6
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gst_gl_sync_meta_wait ()
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void
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gst_gl_sync_meta_wait (GstGLSyncMeta *sync_meta,
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GstGLContext *context);
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Insert a wait into context
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's command stream ensuring all previous OpenGL
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commands before sync_meta
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have completed.
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Parameters
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sync_meta
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a GstGLSyncMeta
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context
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a GstGLContext
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Since: 1.6
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gst_gl_sync_meta_wait_cpu ()
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void
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gst_gl_sync_meta_wait_cpu (GstGLSyncMeta *sync_meta,
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GstGLContext *context);
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Perform a wait so that the sync point has passed from the CPU's perspective
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What that means, is that all GL operations changing CPU-visible data before
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the sync point are now visible.
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Parameters
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sync_meta
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a GstGLSyncMeta
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context
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a GstGLContext
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Since: 1.8
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Types and Values
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struct GstGLSyncMeta
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struct GstGLSyncMeta {
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GstMeta parent;
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GstGLContext *context;
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gpointer data;
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void (*set_sync) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*set_sync_gl) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*wait) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*wait_gl) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*wait_cpu) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*wait_cpu_gl) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*copy) (GstGLSyncMeta * src, GstBuffer * sbuffer, GstGLSyncMeta * dest, GstBuffer * dbuffer);
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void (*free) (GstGLSyncMeta * sync, GstGLContext * context);
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void (*free_gl) (GstGLSyncMeta * sync, GstGLContext * context);
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};
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Members
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GstMeta parent;
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the parent GstMeta
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GstGLContext *context;
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the GstGLContext used to allocate the meta
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gpointer data;
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a custom data pointer for the implementation
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set_sync ()
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set a sync point in the OpenGL command stream
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set_sync_gl ()
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the same as set_sync
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but called from context
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's thread
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wait ()
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execute a wait on the previously set sync point into the OpenGL command stream
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wait_gl ()
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the same as wait
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but called from context
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's thread
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wait_cpu ()
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wait for the previously set sync point to pass from the CPU
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wait_cpu_gl ()
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the same as wait_cpu
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but called from context
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's thread
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copy ()
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copy data
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into a new GstGLSyncMeta
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free ()
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free data
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free_gl ()
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free data
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in context
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's thread
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GST_BUFFER_POOL_OPTION_GL_SYNC_META
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#define GST_BUFFER_POOL_OPTION_GL_SYNC_META "GstBufferPoolOptionGLSyncMeta"
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An option that can be activated on bufferpools to request OpenGL
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synchronization metadata on buffers from the pool.
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See Also
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GstGLBaseMemory, GstGLContext
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