[gst-devel] querry : filesrc element

[arnabsamanta]

Hi Ved,
		Thanks for your reply. It has been very helpful. :-)
regards,
	~Arnab

-----Original Message-----
From: ved kpl [mailto:ved.kpl at gmail.com]
Sent: Sunday, October 26, 2008 4:40 PM
To: arnabsamanta at tataelxsi.co.in; Discussion of the development of
GStreamer
Cc: fberckel at xs4all.nl
Subject: Re: [gst-devel] querry : filesrc element


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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