<br><br><div class="gmail_quote">2010/3/24 Edward Hervey <span dir="ltr"><<a href="mailto:bilboed@gmail.com">bilboed@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi,<br> <div class="im"><br> On Wed, 2010-03-24 at 11:05 +0100, Mattias Barthiel wrote:<br> > Hi,<br> ><br> > I have just made use of the nice feature of the gst-bus to pass messages<br> > from an element to the application.<br> ><br> > How do you message in the other direction? application->element?<br> <br> </div> The bus is only designed for message passing from element to upstream<br> elements (and eventually application).<br> <br></blockquote><div><br>You can post your own application-specific messages on the bus:<br><br><a href="http://www.gstreamer.net/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMessage.html#gst-message-new-application">http://www.gstreamer.net/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMessage.html#gst-message-new-application</a><br> <br>but unless you've written elements specifically for your application that are expecting such messages, this is only really useful for passing messages between different components in your app in a thread-safe way (assuming they are in different threads).<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> If you want to pass instructions to an element... Just use the<br> property system by adding properties to your element and setting them<br> (ex: g_object_set (myelement, "thisvariable", thisvalue, NULL)).<br></blockquote><div><br>Adding properties is definitely more straightforward/cleaner than handling application-specific messages.<br><br>Best,<br> Tristan<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> </blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Edward<br> <br> ><br> ><br> > Best regards,<br> ><br> > Mattias<br> <div><div></div><div class="h5">><br> <br> <br> <br> ------------------------------------------------------------------------------<br> Download Intel&#174; Parallel Studio Eval<br> Try the new software tools for yourself. Speed compiling, find bugs<br> proactively, and fine-tune applications for parallel performance.<br> See why Intel Parallel Studio got high marks during beta.<br> <a href="http://p.sf.net/sfu/intel-sw-dev" target="_blank">http://p.sf.net/sfu/intel-sw-dev</a><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a><br> </div></div></blockquote></div><br><br clear="all"><br>-- <br>Tristan Matthews<br>email: <a href="mailto:tristan@sat.qc.ca">tristan@sat.qc.ca</a><br>web: <a href="http://tristanswork.blogspot.com">http://tristanswork.blogspot.com</a><br>