<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=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@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;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
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;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></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="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoPlainText">Thank you for the information, Haihao. I have filed this feature request in bugzilla.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">https://bugs.freedesktop.org/show_bug.cgi?id=99193<o:p></o:p></p>
<p class="MsoPlainText"><a name="_MailEndCompose">
<o:p></o:p></a></p>
<p class="MsoPlainText">Jon<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><a name="_____replyseparator"></a>-----Original Message-----<br>
From: Xiang, Haihao <br>
Sent: Friday, December 23, 2016 12:55 AM<br>
To: Recker, Jon <jon.recker@intel.com>; libva@lists.freedesktop.org<br>
Subject: Re: [Libva] Filling background pixels with YUV values</p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi Jon,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">VA-API doesn't support YUV background color. If you want to have this feature, I suggest you file a bug with severity set to enhancement in the bugzilla to track your requirement. We may consider to add this new feature in a future version.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thanks<o:p></o:p></p>
<p class="MsoPlainText">Haihao<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">> Hello.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> When composing several sources into a single output surface, we can
<o:p></o:p></p>
<p class="MsoPlainText">> specify the color of the background pixels using <o:p></o:p></p>
<p class="MsoPlainText">> VAProcPipelineParameterBuffer::output_background_color. According to
<o:p></o:p></p>
<p class="MsoPlainText">> the documentation, this background color must be a 32-bit ARGB value.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> But when the output is a non-RGB format (for example, NV12) it would
<o:p></o:p></p>
<p class="MsoPlainText">> be helpful if we could set the background color to a constant YUV
<o:p></o:p></p>
<p class="MsoPlainText">> value instead. Does libva provide any method to do this?<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> I have tried converting the desired YUV background color to RGB, then
<o:p></o:p></p>
<p class="MsoPlainText">> setting output_background_color to this RGB value. When the final
<o:p></o:p></p>
<p class="MsoPlainText">> picture is processed, the background color is converted back to YUV
<o:p></o:p></p>
<p class="MsoPlainText">> automatically. But the final background color does not necessarily
<o:p></o:p></p>
<p class="MsoPlainText">> match the requested value, for example when one of the RGB channels is
<o:p></o:p></p>
<p class="MsoPlainText">> clipped to fit in the range [0,255].<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> A workaround would be to create a separate full-size NV12 surface and
<o:p></o:p></p>
<p class="MsoPlainText">> fill it with the desired background color, but for performance reasons
<o:p></o:p></p>
<p class="MsoPlainText">> it is preferable to avoid this. Any suggestions would be very much
<o:p></o:p></p>
<p class="MsoPlainText">> appreciated. Thanks.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> Jon<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> _______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">> Libva mailing list<o:p></o:p></p>
<p class="MsoPlainText">> <a href="mailto:Libva@lists.freedesktop.org"><span style="color:windowtext;text-decoration:none">Libva@lists.freedesktop.org</span></a><o:p></o:p></p>
<p class="MsoPlainText">> <a href="https://lists.freedesktop.org/mailman/listinfo/libva">
<span style="color:windowtext;text-decoration:none">https://lists.freedesktop.org/mailman/listinfo/libva</span></a><o:p></o:p></p>
</div>
</body>
</html>