[gst-devel] Usage of gst_pad_alloc_buffer in source elements ?

[Lionel Landwerlin]

Well...

I'm expecting mpegts data from various sources (file/http/udp/etc...)
to be transfered through dma to the hardware demuxer.
Does it make sense ?

--
Lionel Landwerlin

On Tue, Dec 22, 2009 at 11:04 AM, Julien Moutte <julien at moutte.net> wrote:
> If your source element directly produce video frames then it makes sense to
> implement such allocation functions.
>
> As most source elements are producing compressed data (filesrc,
> demuxers,etc...), it does not really make sense to write into a downstream
> allocated buffer.
>
> Hope this helps,
>
> Julien Moutte,
> FLUENDO S.A.
>
>
> On Tue, Dec 22, 2009 at 10:47 AM, Lionel Landwerlin <llandwerlin at gmail.com>
> wrote:
>>
>> Hi gstreamer-devel,
>>
>> I'm interested in writing a bunch of plugins/elements to get gstreamer
>> perform well enough to display SD/HD videos on a set top box chip.
>> >From my firsts investigations, it seems quite possible and development
>> should start quite soon. However, after reading a few article about
>> gstreamer on TI OMAP chips (this one in particular
>>
>> http://www.eetimes.com/news/design/showArticle.jhtml?articleID=193401461&pgno=2
>> ),
>> I'm wondering why most of the source elements does not use the
>> gst_pad_alloc_buffer function.
>>
>> In my case, this would be quite interesting to avoid a memory copy and
>> to directly write into a contigeous dma mmapped buffer.
>>
>> Is it something to be done ?
>> Is there a very few interest from the community ?
>>
>> Thanks in advance for your responses.
>>
>> --
>> Lionel Landwerlin
>>
>>
>> ------------------------------------------------------------------------------
>> This SF.Net email is sponsored by the Verizon Developer Community
>> Take advantage of Verizon's best-in-class app development support
>> A streamlined, 14 day to market process makes app distribution fast and
>> easy
>> Join now and get one step closer to millions of Verizon customers
>> http://p.sf.net/sfu/verizon-dev2dev
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer Community
> Take advantage of Verizon's best-in-class app development support
> A streamlined, 14 day to market process makes app distribution fast and easy
> Join now and get one step closer to millions of Verizon customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>