<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 14 (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:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 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;
font-size:11.0pt;
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;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle18
{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;}
--></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">
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Zhao, Halley
<br>
<b>Sent:</b> Friday, October 24, 2014 3:51 PM<br>
<b>To:</b> libva@lists.freedesktop.org; libyami@lists.01.org<br>
<b>Subject:</b> libyami 0.1 release<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Libyami is core video library to accelerate decoding/encoding based on libva.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Libyami can be treated as development kit for VAAPI. It is developed by C++ language, with simple/efficient APIs, without external dependencies.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">libyami targets two type of usage:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> - Hardware accelerated codec is the major gap (there is existing media framework ), for example: Chromeos/Android, maybe ffmpeg.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> - Usage is simple enough that codec is the major interest, for example: remote desktop client/server, video surveillance.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So far H.264 decode/encode, VP8 and JPEG decode are supported. VP8/JPEG encode support is under development.<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">There are rich tests/examples in yami for a try. The tests can run without Window system (X11/Wayland etc),<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">some modes of video output are supported: including raw data dump and some modes of texture (TFP, drm flink name, dma_buf).<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">More details see: <a href="https://github.com/01org/libyami/wiki">
https://github.com/01org/libyami/wiki</a><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">The future release plan are:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:9.0pt"><span lang="EN-US">Nov: v0.11: <o:p>
</o:p></span></p>
<p class="MsoNormal" style="text-indent:9.0pt"><span lang="EN-US"> V4L2 VDA/VEA<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Dec: v0.2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Vp8 and jpeg encoder(depends on driver release)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> unified input/output buffer of yami<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Feb'15: v0.3<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Vp9 decoder<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> transcoding support with unified input/output buffer<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> camera dma_buf support, camera with jpeg input<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> use yami in ffmpeg for hw codec<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"> Future:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> h265 decoder<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> legacy codec: mpeg2 decoder/encoder, vc1 decoder, mpeg4/h263 decoder/encoder<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">Known issues:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> some jpeg file similarity <0.99 (~0.98) after decoding<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <a href="https://github.com/01org/libyami/issues/108">
https://github.com/01org/libyami/issues/108</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> playback performance through gst-omx is not good:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <a href="https://github.com/01org/libyami/issues/34">
https://github.com/01org/libyami/issues/34</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Encodeing quality through gst-omx is not good:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <a href="https://github.com/01org/libyami/issues/36">
https://github.com/01org/libyami/issues/36</a><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"><o:p> </o:p></span></p>
</div>
</body>
</html>