[gst-devel] querry : filesrc element

[ved kpl]

Hi,

Filesrc is derived from basesrc. Mostly src elements will start the
streaming thread  to push the data to next element.
Look at the scheduling modes in gstreamer. Writing a src/sink element
is different than a normal filter element.
The base classes will do most of the task for you.

Ved

On Sun, Oct 26, 2008 at 9:49 AM, arnabsamanta
<arnabsamanta at tataelxsi.co.in> wrote:
> Hi Frans ,
>        Thanks for your reply.
>        I have gone through the plug in writers guide , as you suggested.
>
>
>        About the Filesrc element , it has neither a chain ( ) nor any known macro
> of functions for pushing the data to the pad s .  The implementation is
> different from the other plug ins which have a sink and a src pad. I could
> find the similairity in implementation with filesink , udpsrc etc elements
> which either comes first as src of pipeline or at last as sink of pipeline.
>
>        Now , again my doubt is without a chain( ) and a pad_push(), how the data
> is send to the next element ?
>        Do we have any other mechanisms for the same ?
>
>        ~Arnab
>
> -----Original Message-----
> From: Frans van Berckel [mailto:fberckel at xs4all.nl]
> Sent: Saturday, October 25, 2008 2:54 PM
> To: arnabsamanta at tataelxsi.co.in; Discussion of the development of
> GStreamer
> Subject: Re: [gst-devel] querry : filesrc element
>
>
> In general maybe the GStreamer Plugin Writer's Guide will be a good
> starting point, chapter 2 the foundations.
>
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html
>
>
> Frans van Berckel
>
> On Sat, 2008-10-25 at 13:49 +0530, arnabsamanta wrote:
>> Hi
>>       I am trying to understand the filesrc element implementation.
>>       My previous idea was that the data is pushed into the srcpad through
>> "gst_pad_push" with srcpad and data buffer pointer    as argument supplied
> to
>> this function.
>>       But am unable to view any such similar kind of function related to pad
>> push() here in filesrc code.
>>
>>       can any body please tell me how exactly the data is pushed into the next
>> element ?
>>
>>  Regards,
>>       ~Arnab
>>
>>
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