[gst-devel] querry : how the chain function and the activate_push function is called by the gstreamer core?

[ved kpl]

HI,

activate_push() is used by the core to decide the scheduling mode.
You probably need to understand scheduling in gstreamer.

http://webcvs.freedesktop.org/gstreamer/gstreamer/docs/design/part-scheduling.txt?view=markup

Ved

On Mon, Oct 6, 2008 at 12:39 PM, arnabsamanta
<arnabsamanta at tataelxsi.co.in> wrote:
>  Hi ,
>        there are two functions in the queue element namely
>                        gst_queue_chain() which does all the data processing
>                        gst_queue_src_activate_push() which pushes away the data out of the
> plugin
>
>        Can any body tell me how exactly these two functions - gst_plugin_chain()
> and gst_plugin_src_activate_push() will be      called ?
>
>        both the functions are declared in the plugin_init ()
>
>        is it like once the chain() is called and then the src_activate_push () is
> called and the loop gets repeated with chain                            () and src_activate_push()
> alternately ? but then i added a counter in both these functions and
> displayed once they are called and observed that only the chain() function
> is displayed and not the                                other one in the src_activate_push
>                                                        or,
>                        the chain() function is called and after its data processing is
> completely over , then the                                              src_activate_push () is called ? if this is
> the case , then how the data is sent to the source                                      element from the
> filesrc element which send 4K bytes each time ? because to my understanding
> if the                          chain() is executed at a time , then the entire file has to be
> read and stord at once , which is                               quite not possible. am i right ?
>
>
>        I am unable to understand the squence by which the gstreamer core calls the
> functions declared in the init()
>
>
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