<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
text-indent:21.0pt;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri","sans-serif";}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1857841589;
mso-list-type:hybrid;
mso-list-template-ids:1092915516 -1006190852 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:18.0pt;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-text:"%2\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:42.0pt;
text-indent:-21.0pt;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
margin-left:63.0pt;
text-indent:-21.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:84.0pt;
text-indent:-21.0pt;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-text:"%5\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:105.0pt;
text-indent:-21.0pt;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
margin-left:126.0pt;
text-indent:-21.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:147.0pt;
text-indent:-21.0pt;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-text:"%8\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:168.0pt;
text-indent:-21.0pt;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
margin-left:189.0pt;
text-indent:-21.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="ZH-CN" link="blue" vlink="purple" style="text-justify-trim:punctuation">
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Is it possible to support Bay Trail since its graphics is similar with HD4000? Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Hai<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></a></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:11.0pt">From:</span></b><span lang="EN-US" style="font-size:11.0pt"> libva-bounces@lists.freedesktop.org [mailto:libva-bounces@lists.freedesktop.org]
<b>On Behalf Of </b>Zou, Nanhai<br>
<b>Sent:</b> Wednesday, October 30, 2013 4:03 PM<br>
<b>To:</b> libva@lists.freedesktop.org; beignet@lists.freedesktop.org<br>
<b>Cc:</b> Lu, Guanqun<br>
<b>Subject:</b> [Libva] Use OpenCL to do video post processing for libva.<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the previous versions of libva intel-driver, video post processing features are mostly developed by GEN assembly.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Those assembly are extremely hard to write/debug and understand, could not be reused across different GEN platform.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This limited developers to develop their video processing algorithm over libva.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Now we have setup an experimental branch in libva to use OpenCL as the video post processing language.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This branch can share video buffer with beignet driver as bo, then call OpenCL to process the video buffer as an image object.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So that people develop high performance VPP with high level language on GPU with zero copy. (in current stage, beignet only support HD4000).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For those who are interested in develop their own VPP algorithm, you may try it and give feedback to us.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We have put 4 example post processing kernels in that branch.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Make and Install Beignet from git://anongit.freedesktop.org/beignet with opencl-1.2 branch.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Install ocl-icd driver<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">3 Make and Install libva driver and libva intel-driver from<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> git://people.freedesktop.org/~yakuiz/libva<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt"><span lang="EN-US">git://people.freedesktop.org/~yakuiz/intel-driver<o:p></o:p></span></p>
<p class="MsoPlainText" style="text-indent:21.0pt"><span lang="EN-US">Please add --enable-opencl when configuring libva intel-driver.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">export INTEL_OCL="gray" to specify which opencl kernel to use.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">We have put 4 sample opencl kernels in the branch, "gray", "blur", "mirror" and "pixelated".<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Use a vaapi enabled mplayer to playback a video.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">mplayer -vo vaapi:scaling=fast -va vaapi <your-mp4-video-file><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Then you will see the post processing effect.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">TODOs.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Extend the API to a more flexible version, so that OpenCL can handle more than 1 reference buffer or used in other video processing function.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">E.g. video-encoding processing and camera pipeline.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Expose more ways to access video buffer, to access video buffer as raw data or with other pixel format.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Expose the hardware media sampler function to OCL as built-in.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Zou Nanhai<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<o:p></o:p></span></p>
</div>
</body>
</html>