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| <title>clEnqueueReleaseDX9MediaSurfacesKHR</title> |
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| <body> |
| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clEnqueueReleaseDX9MediaSurfacesKHR"></a> |
| <h1>clEnqueueReleaseDX9MediaSurfacesKHR</h1> |
| <p>Release OpenCL memory objects that have been created from media surfaces.</p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_int</a> |
| <strong class="fsfunc">clEnqueueReleaseDX9MediaSurfacesKHR</strong>(</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_command_queue</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_objects</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*mem_objects</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_events_in_wait_list</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td> |
| const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event_wait_list</var> |
| , </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="parameters"></a> |
| <h2>Parameters</h2> |
| <div class="variablelist"> |
| <dl class="variablelist"> |
| <dt> |
| <span class="term"> |
| <code class="varname">command_queue</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A valid command-queue. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">num_objects</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| The number of memory objects to be released in <code class="varname">mem_objects</code>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">mem_objects</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A pointer to a list of OpenCL memory objects that were created from |
| media surfaces. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"><code class="varname">num_events_in_wait_list</code>, <code class="varname">event_wait_list</code></span> |
| </dt> |
| <dd> |
| <p> |
| Specify events that need to complete before this particular |
| command can be executed. If <code class="varname">event_wait_list</code> |
| is NULL, then this particular command does not wait on any |
| event to complete. If <code class="varname">event_wait_list</code> is |
| NULL, <code class="varname">num_events_in_wait_list</code> must be 0. If |
| <code class="varname">event_wait_list</code> is not NULL, the list of events |
| pointed to by <code class="varname">event_wait_list</code> must be valid and |
| <code class="varname">num_events_in_wait_list</code> must be greater than 0. |
| The events specified in <code class="varname">event</code> returns an event object |
| that identifies this particular command and can be used to query or queue a |
| wait for this particular command to complete. <code class="varname">event</code> 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. |
| If the <code class="varname">event_wait_list</code> and the event arguments are not |
| NULL, the <code class="varname">event</code> argument should not refer to an element |
| of the <code class="varname">event_wait_list</code> array. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| Used to release OpenCL memory objects that have been created from media |
| surfaces. The media surfaces are released by the OpenCL context associated with |
| <code class="varname">command_queue</code>. |
| </p> |
| <p> |
| OpenCL memory objects created from media surfaces which have been acquired by OpenCL must |
| be released by OpenCL before they may be accessed by the media adapter API. Accessing |
| a media surface while its corresponding OpenCL memory object is acquired is in error |
| and will result in undefined behavior, including but not limited to possible OpenCL |
| errors, data corruption, and program termination. |
| </p> |
| <p> |
| If <code class="constant">CL_CONTEXT_INTEROP_USER_SYNC</code> is not |
| specified as <code class="constant">CL_TRUE</code> during context creation, |
| <code class="function">clEnqueueReleaseDX9MediaSurfacesKHR</code> provides the |
| synchronization guarantee that any calls to media adapter APIs involving |
| the interop device(s) used in the OpenCL context made after the call to |
| <code class="function">clEnqueueReleaseDX9MediaSurfacesKHR</code> will not start executing until |
| after all events in <code class="varname">event_wait_list</code> are complete and all work already |
| submitted to <code class="varname">command_queue</code> completes execution. If the context was |
| created with properties specifying <code class="constant">CL_CONTEXT_INTEROP_USER_SYNC</code> |
| as <code class="constant">CL_TRUE</code>, the user is responsible for guaranteeing that any |
| media adapter API calls involving the interop device(s) used in the OpenCL context made |
| after <code class="function">clEnqueueReleaseDX9MediaSurfacesKHR</code> will not start executing |
| until after event returned by <code class="function">clEnqueueReleaseDX9MediaSurfacesKHR</code> |
| reports completion. |
| </p> |
| <p> |
| General information about sharing memory objects with DX9 follows. |
| </p> |
| <p> |
| The goal of this extension is to allow applications to use media surfaces as OpenCL memory |
| objects. This allows efficient sharing of data between OpenCL and selected adapter APIs (only |
| DX9 for now). If this extension is supported, an OpenCL image object can be created from a |
| media surface and the OpenCL API can be used to execute kernels that read and/or write |
| memory objects that are media surfaces. Note that OpenCL memory objects may be created |
| from the adapter media surface if and only if the OpenCL context has been created from that |
| adapter. |
| </p> |
| <p> |
| If this extension is supported by an implementation, the string "cl_khr_dx9_media_sharing" |
| will be present in the <code class="constant">CL_PLATFORM_EXTENSIONS</code> |
| (see <a class="citerefentry" href="clGetPlatformInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformInfo</span></span></a>) |
| or <code class="constant">CL_DEVICE_EXTENSIONS</code> |
| (see <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a>). |
| </p> |
| <p> |
| As currently proposed the interfaces for this extension would be provided in |
| <code class="code">cl_dx9_media_sharing.h</code>. |
| </p> |
| <h4><a id="id-1.6.9"></a>Surface formats for Media Surface Sharing</h4> |
| <p> |
| |
| This section includes the D3D surface formats |
| that are supported when the adapter type is one of the Direct 3D lineage. Using a D3D |
| surface format not listed here is an error. To extend the use of this extension to support |
| media adapters beyond DirectX9 tables similar to the ones in this section will need to be |
| defined for the surface formats supported by the new media adapter. All implementations |
| that support this extension are required to support the NV12 surface format, the other |
| surface formats supported are the same surface formats that the adapter you are sharing |
| with supports as long as they are listed in the tables below (Tables 9.10.3 and 9.10.4). |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="center" class="col1" /> |
| <col align="center" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="center">FOUR CC code</th> |
| <th align="center">CL image format (channel order, channel data type)</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="center">FOURCC('N', 'V', '1', '2'), Plane 0</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">FOURCC('N', 'V', '1', '2'), Plane 1</td> |
| <td align="center"> |
| <code class="constant">CL_RG, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">FOURCC('Y', 'V', '1', '2'), Plane 0</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">FOURCC('Y', 'V', '1', '2'), Plane 1</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">FOURCC('Y', 'V', '1', '2'), Plane 2</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <p> |
| In the table above, NV12 Plane 0 corresponds to the luminance (Y) channel and Plane 1 |
| corresponds to the UV channels. The YV12 Plane 0 corresponds to the Y channel, Plane |
| 1 to the U channel and Plane 2 to the V channel. Note that the YUV formats map to |
| <code class="constant">CL_R</code> and <code class="constant">CL_RG</code> but do not perform any YUV to |
| RGB conversion and vice-versa. |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="center" class="col1" /> |
| <col align="center" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="center">D3D format</th> |
| <th align="center">CL image format (channel order, channel data type)</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="center">D3DFMT_R32F</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_R16F</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_HALF_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_L16</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_UNORM_INT16</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A8</td> |
| <td align="center"> |
| <code class="constant">CL_A, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_L8</td> |
| <td align="center"> |
| <code class="constant">CL_R, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_G32R32F</td> |
| <td align="center"> |
| <code class="constant">CL_RG, CL_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_G16R16F</td> |
| <td align="center"> |
| <code class="constant">CL_RG, CL_HALF_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_G16R16</td> |
| <td align="center"> |
| <code class="constant">CL_RG, CL_UNORM_INT16</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A8L8</td> |
| <td align="center"> |
| <code class="constant">CL_RG, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A32B32G32R32F</td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A16B16G16R16F</td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_HALF_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A16B16G16R16</td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNORM_INT16</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A8B8G8R8</td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_X8B8G8R8</td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_A8R8G8B8</td> |
| <td align="center"> |
| <code class="constant">CL_BGRA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center">D3DFMT_X8R8G8B8</td> |
| <td align="center"> |
| <code class="constant">CL_BGRA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <p> |
| Note that D3D9 format names seem to imply that the order of the color channels are switched |
| relative to OpenCL but this is not the case. For example, layout of channels for each pixel |
| for <code class="constant">D3DFMT_A32FB32FG32FR32F</code> is the same as |
| <code class="constant">CL_RGBA</code>, <code class="constant">CL_FLOAT</code>. |
| </p> |
| <p> |
| Properties of media surface objects may be queried using |
| <a class="citerefentry" href="clGetMemObjectInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetMemObjectInfo</span></span></a> |
| and <a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</span></span></a> with |
| <code class="varname">param_name</code> <code class="constant">CL_MEM_DX9_MEDIA_ADAPTER_TYPE_KHR</code>, |
| <code class="constant">CL_MEM_DX9_MEDIA_SURFACE_INFO_KHR</code> and |
| <code class="constant">CL_IMAGE_DX9_MEDIA_SURFACE_PLANE_KHR</code>. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| Returns <span class="errorname">CL_SUCCESS</span> returns <span class="errorname">CL_SUCCESS</span> |
| if the function is executed successfully. If <code class="varname">num_objects</code> is 0 and |
| <<code class="varname">mem_objects</code>> is NULL then the function does nothing and returns |
| <span class="errorname">CL_SUCCESS</span>. Otherwise it returns one of the following errors: |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">num_objects</code> is zero and |
| <code class="varname">mem_objects</code> is not a NULL value or if <code class="varname">num_objects</code> |
| > 0 and <code class="varname">mem_objects</code> is NULL. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MEM_OBJECT</span> if memory objects in <code class="varname">mem_objects</code> |
| are not valid OpenCL memory objects or if memory objects in <code class="varname">mem_objects</code> have |
| not been created from valid media surfaces. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_COMMAND_QUEUE</span> if <code class="varname">command_queue</code> is not |
| a valid command-queue. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if context associated with |
| <code class="varname">command_queue</code> was not created from a media object. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_DX9_MEDIA_SURFACE_NOT_ACQUIRED_KHR</span> if memory objects in |
| <code class="varname">mem_objects</code> have not been previously been acquired using |
| <a class="citerefentry" href="clEnqueueAcquireDX9MediaSurfacesKHR.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueAcquireDX9MediaSurfacesKHR</span></span></a> |
| or have been released using |
| <code class="function">clEnqueueReleaseDX9MediaSurfacesKHR</code> |
| since the last time that they were acquired. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT_WAIT_LIST</span> if <code class="varname">event_wait_list</code> is |
| NULL and <code class="varname">num_event_in_wait_list</code> > 0, or <code class="varname">event_wait_list</code> |
| is not NULL and <code class="varname">num_event_in_wait_list</code> is 0, or if event objects in |
| <code class="varname">event_wait_list</code> are not valid events. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the host. |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p><img src="pdficon_small1.gif" /> |
| <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-extensions.pdf#page=91" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a> |
| </p> |
| </div> |
| <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2015 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. |
| </div> |
| </div> |
| </body> |
| </html> |
