When am I Sometimes?

[Wes Miller]

is it possible to ask an element if it supplies a sometimes pad?


Goal is, of course, to be able to say:

     if ( gst_element_has_sometimes_sink_pads( GstElement *element ))
          then g_signal_connect( .... )

Thanks,

Wes

[Thiago Sousa Santos-2]

On Mon, Jul 12, 2010 at 5:11 PM, Wes Miller <[hidden email]> wrote:

is it possible to ask an element if it supplies a sometimes pad?

You can use GstElement's API to get the pad templates list and look over it.

 

Goal is, of course, to be able to say:

    if ( gst_element_has_sometimes_sink_pads( GstElement *element ))
         then g_signal_connect( .... )

Thanks,

Wes

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[Wes Miller]

> You can use GstElement's API to get the pad templates list and look over it.

I think this is what you mean.  It requires knowing the element's element class.  


     gst_element_class_get_pad_template_list()

     GList*  gst_element_class_get_pad_template_list( GstElementClass *element_class );

     Retrieves a list of the pad templates associated with element_class. The list must
     not be modified by the calling code.


How do I get the element class?  

Thanks,

Wes

[Sandeep Prakash]

Hi Wes,

Wes Miller wrote

How do I get the element class?  

You can get the element class as follows:
element = gst_element_factory_make ("qtdemux", "demuxer"); // for example sake, has sometimes pad

GstElementClass *klass = G_OBJECT_GET_CLASS(element);

With this we can use
GList*  gst_element_class_get_pad_template_list( GstElementClass *element_class );
to get the pad template list, which will have sometimes pads also.

Regards,
Sandeep Prakash