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<p class="MsoNormal"><span lang="EN-US">When a wl_buffer (of video frame) is committed to wayland server, this buffer keeps being used by server until a second buffer is committed.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It means a wl_buffer isn’t ready to destroy in frame callback, but wl_buffer_send_release(). And the buffer (in media pipeline) should also be retained for some time after it is committed to server side.<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">This expose additional questions for the last video buffer.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![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">Should we commit empty wl_buffer upon stopping of video playback?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:42.0pt;text-indent:-21.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">a)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Does Weston support it ? (use empty buffer to replace previous committed buffer)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:42.0pt;text-indent:-21.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">b)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">If yes, is there any example to use it?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![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">When to destroy the event queue if it is used?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US">Usually media creates an event queue, wl_buffer is also set to this queue. It comes a question that when to destroy this event queue, since wl_buffer_send_release() (on
this event queue) happens after media stop. <o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:42.0pt;text-indent:-21.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">a)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Should we have an event like wl_surface_send_release() to give the chance to destroy this event queue?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:42.0pt;text-indent:-21.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">b)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">If not, then we have to destroy this event queue upon wl_buffer_send_release of the last buffer.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:63.0pt;text-indent:-63.0pt;mso-text-indent-alt:-21.0pt;mso-list:l0 level3 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>i.<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span lang="EN-US">Is it ok to destroy the event queue in the callback function of the event in this queue?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:63.0pt;text-indent:-63.0pt;mso-text-indent-alt:-21.0pt;mso-list:l0 level3 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>ii.<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span lang="EN-US">It creates complexity to sycn on the last buffer release event in media.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:42.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US"><o:p> </o:p></span></p>
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