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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd" [
<!ENTITY mediaSurfaceFormatsInc SYSTEM "mediaSurfaceFormatsInc.xml">
<!ENTITY accessMappedInc SYSTEM "accessMappedInc.xml">
]>
<refentry>
<refentryinfo>
<keywordset><keyword>clEnqueueAcquireDX9MediaSurfacesKHR</keyword></keywordset>
</refentryinfo>
<refmeta>
<refentrytitle>clEnqueueAcquireDX9MediaSurfacesKHR</refentrytitle>
<refmiscinfo>
<copyright>
<year>2007-2011</year>
<holder>The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.</holder>
</copyright>
</refmiscinfo>
<manvolnum>3</manvolnum>
</refmeta>
<!-- ================================ SYNOPSIS -->
<refnamediv id="clEnqueueAcquireDX9MediaSurfacesKHR">
<refname>clEnqueueAcquireDX9MediaSurfacesKHR</refname>
<refpurpose>Acquire OpenCL memory objects that have been created from a media surface.</refpurpose>
</refnamediv>
<refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title>
<funcsynopsis>
<funcprototype>
<funcdef>
<link xlink:href="scalarDataTypes.html">cl_int</link>
<function>clEnqueueAcquireDX9MediaSurfacesKHR</function></funcdef>
<paramdef><link xlink:href="abstractDataTypes.html">cl_command_queue</link>
<parameter>command_queue</parameter></paramdef>
<paramdef><link xlink:href="scalarDataTypes.html">cl_uint</link>
<parameter>num_objects</parameter></paramdef>
<paramdef>const <link xlink:href="abstractDataTypes.html">cl_mem</link><parameter>*mem_objects</parameter></paramdef>
<paramdef><link xlink:href="scalarDataTypes.html">cl_uint</link><parameter>num_events_in_wait_list</parameter></paramdef>
<paramdef>
const <link xlink:href="abstractDataTypes.html">cl_event</link>
<parameter>*event_wait_list</parameter>
</paramdef>
<paramdef><link xlink:href="abstractDataTypes.html">cl_event</link><parameter>*event</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<!-- ================================ PARAMETERS -->
<refsect1 id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><varname>command_queue</varname></term>
<listitem>
<para>
A valid command-queue.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>num_objects</varname></term>
<listitem>
<para>
The number of memory objects to be acquired in <varname>mem_objects</varname>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>mem_objects</varname></term>
<listitem>
<para>
A pointer to a list of OpenCL memory objects that were created from
media surfaces.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>num_events_in_wait_list</varname>, <varname>event_wait_list</varname></term>
<listitem>
<para>
Specify events that need to complete before this particular
command can be executed. If <varname>event_wait_list</varname>
is NULL, then this particular command does not wait on any
event to complete. If <varname>event_wait_list</varname> is
NULL, <varname>num_events_in_wait_list</varname> must be 0. If
<varname>event_wait_list</varname> is not NULL, the list of events
pointed to by <varname>event_wait_list</varname> must be valid and
<varname>num_events_in_wait_list</varname> must be greater than 0. The events
specified in <varname>event_wait_list</varname> act as synchronization points.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>event</varname></term>
<listitem>
<para>
Returns <replaceable>n</replaceable> event object that identifies this particular
command and can be used to query or queue a wait for this particular command
to complete. <varname>event</varname> can be NULL in which case it will not
be possible for the application to query the status of this command or queue
a wait for this command to complete.
</para>
</listitem>
</varlistentry> </variablelist>
</refsect1>
<!-- ================================ NOTES -->
<refsect1 id="notes"><title>Notes</title>
<para>
Used to acquire OpenCL memory objects that have been created from a media
surface. The media surfaces are acquired by the OpenCL context associated with
<varname>command_queue</varname> and can therefore be used by all command-queues
associated with the OpenCL context.
</para>
<para>
OpenCL memory objects created from media surfaces must be acquired before they can
be used by any OpenCL commands queued to a command-queue. If an OpenCL memory
object created from a media surface is used while it is not currently acquired
by OpenCL, the call attempting to use that OpenCL memory object will return
<constant>CL_DX9_MEDIA_SURFACE_NOT_ACQUIRED_KHR</constant>.
</para>
<para>
If <constant>CL_CONTEXT_INTEROP_USER_SYNC</constant> is not
specified as <constant>CL_TRUE</constant> during context creation,
<function>clEnqueueAcquireDX9MediaSurfacesKHR</function> provides the synchronization
guarantee that any media adapter API calls involving the interop device(s) used in the
OpenCL context made before <function>clEnqueueAcquireDX9MediaSurfacesKHR</function>
is called will complete executing before <varname>event</varname> reports
completion and before the execution of any subsequent OpenCL work issued
in <varname>command_queue</varname> begins. If the context was created with
properties specifying <constant>CL_CONTEXT_INTEROP_USER_SYNC</constant> as
<constant>CL_TRUE</constant>, the user is responsible for guaranteeing that any
media adapter API calls involving the interop device(s) used in the OpenCL context
made before <function>clEnqueueAcquireDX9MediaSurfacesKHR</function> is called have
completed before calling <function>clEnqueueAcquireDX9MediaSurfacesKHR</function>.
</para>
&mediaSurfaceFormatsInc;
&accessMappedInc;
</refsect1>
<!-- ================================ ERRORS -->
<refsect1 id="errors"><title>Errors</title>
<para>
Returns <errorname>CL_SUCCESS</errorname> returns <errorname>CL_SUCCESS</errorname>
if the function is executed successfully. If <varname>num_objects</varname> is 0 and
<varname>mem_objects</varname> is NULL then the function does nothing and returns
<errorname>CL_SUCCESS</errorname>. Otherwise it returns one of the following errors:
</para>
<itemizedlist mark="disc">
<listitem>
<errorname>CL_INVALID_VALUE</errorname> if <varname>num_objects</varname>
is zero and <varname>mem_objects</varname> is not a NULL value or if
<varname>num_objects</varname> > 0 and <varname>mem_objects</varname> is NULL.
</listitem>
<listitem>
<errorname>CL_INVALID_MEM_OBJECT</errorname> if memory objects in
<varname>mem_objects</varname> are not valid OpenCL memory objects or if memory
objects in <varname>mem_objects</varname> have not been created from media surfaces.
</listitem>
<listitem>
<errorname>CL_INVALID_COMMAND_QUEUE</errorname> if <varname>command_queue</varname>
is not a valid command-queue.
</listitem>
<listitem>
<errorname>CL_INVALID_CONTEXT</errorname> if context associated with
<varname>command_queue</varname> was not created from a device that can share
the media surface referenced by <varname>mem_objects</varname>.
</listitem>
<listitem>
<errorname>CL_DX9_MEDIA_SURFACE_ALREADY_ACQUIRED_KHR</errorname> if memory
objects in <varname>mem_objects</varname> have previously been acquired
using <function>clEnqueueAcquireDX9MediaSurfacesKHR</function>
but have not been released using
<citerefentry><refentrytitle>clEnqueueReleaseDX9MediaSurfacesKHR</refentrytitle></citerefentry>.
</listitem>
<listitem>
<errorname>CL_INVALID_EVENT_WAIT_LIST</errorname>
if <varname>event_wait_list</varname> is NULL and
<varname>num_event_in_wait_list</varname> > 0,
or <varname>event_wait_list</varname> is not NULL and
<varname>num_event_in_wait_list</varname> is 0, or if event objects in
<varname>event_wait_list</varname> are not valid events.
</listitem>
<listitem>
<errorname>CL_OUT_OF_HOST_MEMORY</errorname> if there is a failure to allocate
resources required by the OpenCL implementation on the host.
</listitem>
</itemizedlist>
</refsect1>
<!-- ================================ EXAMPLE -->
<!-- DO NOT DELETE IN CASE AN EXAMPLE IS ADDED IN THE FUTURE -->
<!--
<refsect2 id="example1">
<title>
Example
</title>
<informaltable frame="none">
<tgroup cols="1" align="left" colsep="0" rowsep="0">
<colspec colname="col1" colnum="1" />
<tbody>
<row>
<entry>
Example goes here - it will be set in "code" type with white space preserved.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect2>
-->
<!-- ================================ SPECIFICATION -->
<!-- Set the "uri" attribute in the <olink /> element to the "named destination" for the PDF page
-->
<refsect1 id="specification"><title>Specification</title>
<para><imageobject><imagedata fileref="pdficon_small1.gif" format="gif" /></imageobject>
<olink uri="clEnqueueAcquireDX9MediaSurfacesKHR">OpenCL Specification</olink>
</para>
</refsect1>
<!-- ================================ ALSO SEE -->
<refsect1 id="seealso"><title>Also see</title>
<para>
<citerefentry><refentrytitle>cl_khr_dx9_media_sharing</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>clGetDeviceIDsFromDX9MediaAdapterKHR</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>clCreateFromDX9MediaSurfaceKHR</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>clEnqueueReleaseDX9MediaSurfacesKHR</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>clEnqueueAcquireDX9MediaSurfacesKHR</refentrytitle></citerefentry>
</para>
</refsect1>
<!-- ============================== COPYRIGHT -->
<!-- Content included from copyright.inc.xsl -->
<refsect3 id="Copyright"><title></title>
<imageobject>
<imagedata fileref="KhronosLogo.jpg" format="jpg" />
</imageobject>
<para />
</refsect3>
<!-- 24-Oct-2011 -->
</refentry>
|
