<div dir="ltr"><div>Hi Arnb ,</div>
<div> Actually gst_plugin_src_activate_push function is used to activate src pad in push mode , that means src pad can only push the data to next element , and gst_plugin_chain funcion does all the processing and pushes the data to next element using gst_pad_push funcion .</div>
<div> So gst_plugin_src_activate_push will be called only once in order to set some variables but gst_plugin_chain will be called till the data is there in the file . And by default filesrc element sends 4096 bytes of data eveytime to next element . but that can be changed using "blocksize" property of filesrc . </div>
<div> </div>
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<div class="gmail_quote">On Mon, Oct 6, 2008 at 12:39 PM, arnabsamanta <span dir="ltr"><<a href="mailto:arnabsamanta@tataelxsi.co.in">arnabsamanta@tataelxsi.co.in</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> Hi ,<br> there are two functions in the queue element namely<br> gst_queue_chain() which does all the data processing<br>
gst_queue_src_activate_push() which pushes away the data out of the<br>plugin<br><br> Can any body tell me how exactly these two functions - gst_plugin_chain()<br>and gst_plugin_src_activate_push() will be called ?<br>
<br> both the functions are declared in the plugin_init ()<br><br> is it like once the chain() is called and then the src_activate_push () is<br>called and the loop gets repeated with chain () and src_activate_push()<br>
alternately ? but then i added a counter in both these functions and<br>displayed once they are called and observed that only the chain() function<br>is displayed and not the other one in the src_activate_push<br>
or,<br> the chain() function is called and after its data processing is<br>completely over , then the src_activate_push () is called ? if this is<br>
the case , then how the data is sent to the source element from the<br>filesrc element which send 4K bytes each time ? because to my understanding<br>if the chain() is executed at a time , then the entire file has to be<br>
read and stord at once , which is quite not possible. am i right ?<br><br><br> I am unable to understand the squence by which the gstreamer core calls the<br>functions declared in the init()<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Regards,<br><br>Sudarshan Bisht<br></div>