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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thanks Stian, it took me a while to get there but the information you provided was just what it needed<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Regards Keith<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gstreamer-devel [mailto:gstreamer-devel-bounces@lists.freedesktop.org]
<b>Im Auftrag von </b>Stian Selnes<br>
<b>Gesendet:</b> Montag, 7. Juli 2014 11:42<br>
<b>An:</b> Discussion of the development of and with GStreamer<br>
<b>Betreff:</b> Re: writing plugins to make use of specific hardware<o:p></o:p></span></p>
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<p class="MsoNormal">It's possible to add GstVideoAlignment information to the buffer pool in your propose_allocation and decide_allocation function. It has a field padding_bottom that GstVideoBufferPool will consider when allocating buffers. In propose_allocation
you should set padding_bottom so that "(height+padding_bottom)%16 == 0" and then add GstVideoAlignment to the buffer pool config. The same applies for decide_allocation. See gstavviddec.c for an example.<o:p></o:p></p>
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<p class="MsoNormal">- Stian<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Jul 7, 2014 at 10:46 AM, Thornton, Keith <<a href="mailto:keith.thornton@zeiss.com" target="_blank">keith.thornton@zeiss.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Good morning</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I am currently writing a plugin to make use of the Intel Media SDK (Quicksync) under windows.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I am using Gstreamer 1.3</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">The Quicksync Hardware requires 16 bit sizes e.g. 1920 * 1088
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">The pipeline</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Gst-launch-1.0 filesrc location=file.mp4 ! qtdemux ! h264parse ! avdec_h264 ! videoconvert ! video/x-raw,
width=1920, height=1080,format=NV12 ! myplugin ! video/x-raw, width=960,height=540 ! d3dvideosink</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Requires that I allocate a buffer_pool larger than that described by the caps i.e. 1920x1088 instead
of 1920x1080. I assumed that I must implement a propose_allocation and decide_allocation function but could use some guidance if any is available. Can anyone point me to some useful examples or documentation?</span><o:p></o:p></p>
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_______________________________________________<br>
gstreamer-devel mailing list<br>
<a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br>
<a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><o:p></o:p></p>
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