I want to join the group
Yang Zhang
Home software Enabling Engineer, ARM
Phone: +86-21-6229-0729 ext. 681
Email: yang.zhang(a)arm.com<mailto:yang.zhang@arm.com>
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Hi,
I got a suggestion (from a ST-E colleague) to help debug with futur UMM.
The idea is to add a "comment" to each allocated buffer
and with cat /proc/umm you get a list of all the allocated buffers + the
associated comment.
The comment is only a string and you can put what you want it.
For example you can just put the line of the file where the allocation is
done or something like "h264 1080p frame".
I think it could be very useful for debug if we could add this.
Benjamin
As we discussed in today's MMWG technical status call, Vishal is working on
a test content spec, which led to producing a chart of the multimedia format
capabilities of all the Linaro supported development boards. This is similar
to what I started for audio, but I think it makes sense to cover all
multimedia formats. Vishal, if you could create a wiki page for us to
populate, that would be great.
Here is a great example from Android, I'd like to see us produce something
like this: http://developer.android.com/guide/appendix/media-formats.html
I would like for us all to contribute to this capabilities chart. It won't
take long if we all contribute. If you can find out the specifics on a board
that uses your companies technology, or if you have the specs to a dev board
you can get your hands on, or if you can contact someone you know, please
do. This would be a very useful reference chart for everyone wanting to use
or develop on these platforms.
The blueprint for this work is at:
https://blueprints.launchpad.net/linaro-multimedia-wg/+spec/multimedia-lina…
Alexander could you assign this to Vishal?
If you missed today's MMWG tech call, we missed you. Please plan on
attending next week. I'll send out a reminder in advance.
--
Kurt Taylor (irc krtaylor)
Adding linaro-multimedia who also cannot see video on Panda.
On 3 May 2011 03:48, Jim Huang <jim.huang(a)linaro.org> wrote:
> On 3 May 2011 16:19, Alexander Sack <asac(a)linaro.org> wrote:
>> On Mon, May 2, 2011 at 10:44 PM, Zach Pfeffer <zach.pfeffer(a)linaro.org> wrote:
>>> E/FramebufferNativeWindow( 2057): couldn't open framebuffer HAL (No such device)
>>
>> yes, this is the problem. Jim says this works for him. He should have
>> exact info what is needed to make this happen. The kernel Jim gave me
>> didnt work for me either, so I think that Jim must have more changes
>> locally that are not in our clean leb-panda build.
>>
>
> Alternatively, we can roll back to Froyo based GFX, which worked for me, too.
>
> I'm pulling from omap kernel again and rebuilding from scratch. Will
> confirm you guys soon.
>
> Thanks,
> -jserv
>
At the last TSC meeting we refined the list of TRs for the Multimedia team.
https://wiki.linaro.org/Cycles/1111/TechnicalTopics/Multimedia
I have taken the liberty to put these into a wiki page based on the feedback
received during the meeting and some new items added after. Unless told
otherwise, I will be creating the Multimedia WG blueprints from this list.
Here they are sorted by priority:
https://wiki.linaro.org/WorkingGroups/Middleware/Multimedia/BlueprintsFor11…
Please review and be thinking about any questions you have, as well as a
rough sizing for the amount of work required.
Comments?
Kurt Taylor (irc krtaylor)
Hi, all
I'm a engineer from Linaro, currently work on the aac encoder. We plan to
extract aac encoder from android and make it a library. You can find it
on git://git.linaro.org/people/sariohu/voaacenc.git.
I know your team have done similar work on opencore-amr. I'm wondering if
you also can maintain aac encoder from android?
Thanks.
For general information and discussion:
Just to be complete, I have finished a test run using totem to play long
files to see GStreamer in use and it's demand on the system CPU. I tried
several different files, including wav and mp3s. As it turns out, totem only
has about 5 wps while playing both wav and mp3 files, so I am not hopeful in
finding optimization in that code path to reduce the wakes.
My environment is a Panda running maverick netbook, with alsa 1.0.24 and the
latest pulseaudio git head. I am using Powertop as root with the pid and
time options to get the results.
regards,
Kurt Taylor (irc krtaylor)
Hi, All,
I would like to discuss about the next step of aac encoder optimization for
linaro.
Current situation is ,
1. ffmpeg aac encoder is in bad shape and poor performance and encoding
quality.
2. libfaac has license issue for release.
3. Android aac encoder is better for the performance and encoding quality,
but it's Apache licensed.
Here's some options for me of the next steps for aac encoder optimization
1. Continue on ffmpeg aac encoder, but more effort is needed to a acceptable
level.
2. Reuse Android aac encoder. Since it is Apache licensed. We need write a
wrapper to use it in ffmpeg or write a gstreamer plugin to use Android
encoder.
Any suggestions?
