gst-dsp setup / dsp-load check with gst-launch...

[ozka...@gmail.com]

Hi there,

I'm following the instructions in http://elinux.org/BeagleBoardUbuntu#DSP in order to set up gst-dsp in BB-xM. But, I have faced with the following issue which worries me a lot.

Work Environment:

   Kernel: 3.7.10-x13 -->  git://github.com/RobertCNelson/stable-kernel.git

   Ubuntu: 12.10 (with minimal lxde desktop) --> http://rcn-ee.net/deb/rootfs/quantal/ubuntu-12.10-console-armhf-2013-06-14.tar.xz

root@arm:~# ls /lib/dsp

TSPA_Object_Code_Software_License_Agreement.txt  mp4vdec_sn.dll64P

baseimage.dof                                    mpeg4aacdec_sn.dll64P

conversions.dll64P                               qosdyn_3430.dll64P

dctn_dyn.dll64P                                  ringio.dll64P

h264vdec_sn.dll64P                               test.dll64P

jpegdec_sn.dll64P                                usn.dll64P

jpegenc_sn.dll64P                                vpp_sn.dll64P

m4venc_sn.dll64P

root@arm:~# ls /dev/ | grep DspBridge

DspBridge

root@arm:~# dsp-test

copied 1000 times successfully

(during dsp-test)

root@arm:~# dsp-load

load: 0, freq: 0

load: 0, freq: 0

load: 2, freq: 0

load: 64, freq: 0

load: 0, freq: 0

However, the DSP load stays 0 (zero) when I play the video by using gst-launch as follows:

root@arm:~# sudo gst-launch playbin2 uri=file:///media/root/USB20FD/BigBuckBunny_480p_surround-fix.avi

Setting pipeline to PAUSED ...

Pipeline is PREROLLING ...

Missing element: AC-3 (ATSC A/52) decoder

WARNING: from element /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: No decoder available for type 'audio/x-ac3, framed=(boolean)true, rate=(int)48000, channels=(int)6, alignment=(string)frame'.

Additional debug info:

gsturidecodebin.c(874): unknown_type_cb (): /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0

Pipeline is PREROLLED ...

Setting pipeline to PLAYING ...

New clock: GstSystemClock

Does this mean the system is not using DSP to play the video?

Also, I tried the following command but the DSP load didn't change.

root@arm:~# gst-launch -v filesrc location=/media/root/USB20FD/BigBuckBunny_480p_surround-fix.avi ! dspvdec ! dsph264enc ! fakesink

Setting pipeline to PAUSED ...

Pipeline is PREROLLING ...

ERROR: from element /GstPipeline:pipeline0/GstDspVDec:dspvdec0: couldn't start node

ERROR: pipeline doesn't want to preroll.

Setting pipeline to NULL ...

Freeing pipeline ...

Am I missing something during the setup steps described in http://elinux.org/BeagleBoardUbuntu#DSP?

Looking forward to your comments/advice.

Thanks in advance.

Regards,

Ozkan.

[Robert Nelson]

On Wed, Jul 24, 2013 at 3:10 AM, <ozka...@gmail.com> wrote:
> Hi there,
>
> I'm following the instructions in http://elinux.org/BeagleBoardUbuntu#DSP in
> order to set up gst-dsp in BB-xM. But, I have faced with the following issue
> which worries me a lot.

At this time, i really should just drop that section of the wiki.. At
the time of it's initial writing, everything worked (2.6.37 days) but
back then Nokia had a full time developer working on the dsp for
Maemo/etc.. Who's infrastructure i utilized gst-dsp..

Fast forward to today, Nokia is essential no more and I haven't seen
anyone pick up this dsp stuff for maintenance.

So, essentially that dsp section on the page is a more of a memorial
at this point..

Patches welcome if you get it to work.. ;)

Regards,

--
Robert Nelson
http://www.rcn-ee.com/

[ozka...@gmail.com]

Hi again,

After that e-mail I tried other cases such as running a pipeline to encode and send audio/video from BB-xM to Ubuntu-PC by using gst-launch, and I have realized that the "dsp-load" value is changing depends on the encoding type. I reckon this means the system uses the DSP for encoding if the type is matched with installed encoders in base image and dll files. 

In short, it seems the gst-dsp is correctly installed into my BB-xM when I follow the instructions written in http://elinux.org/BeagleBoardUbuntu#DSP.

Regards,

Ozkan. 

[ozka...@gmail.com]

Hint: If you are seeking dspbridge_dsp package for doffbuild, here is the link where you can get it.

http://www.openomap.org/pub/dspbridge/

The package is placed in dspbridge_omapzoom_v1.X.tar.gz.