[vlc-devel] [RFC PATCH 00/11] OMX: enable android hardware buffers (zero copy)

[Thomas Guillem]

Hi Martin,

Thanks for all your comments, I'm OK with all of them, I'll propose a new
set
of patches tomorrow.

For the makefile part, it's in vlc-android git (iomx_hwbuffer.c is build in
libiomx.so). Patches are ready but I didn't send them since I was not sure
to
propose the android headers patches that are about 6MB.

For iomx Graphics Buffers, I need to build libiomx against ics, jb, jbmr2
and
kitkat. I'm not 100% sure that a specific jbmr2 build is needed. I did it
for
Archos Video Player, but maybe it was for an other private API (sigh...).

Thomas.


2014-06-24 18:15 GMT+02:00 Martin Storsjö <martin at martin.st>:

> Hi,
>
>
> On Tue, 24 Jun 2014, Thomas Guillem wrote:
>
>  This set of patches is my first attempt to backport android hardware
>> buffers in
>> OMX from the  Archos Video Player application that I'm working on.
>>
>
> Nice! I did a similar proof of concept some time ago, but it felt quite
> hacky - this does seem a little less bad.
>
>
>  I did the development on a Nexus 10 with last android 4.4.3, and I have a
>> performance issue using HW buffers. I need to investigate more since I
>> know
>> that I don't have any performances issue with my other player. I also
>> tested it
>> on a RK30 and a QCOM device.
>>
>> By the way, I don't know if you want the patches to enable libiomx build
>> on jb
>> and kitkat (mostly android headers patch).
>>
>
> Yes, even though we might not want to build the iomx code specifically for
> those versions, it'd be useful to have your patches for testing.
>
> So far we've been able to use one single set of headers (from ICS) for
> IOMX for everything up to 4.3 - does some of the GraphicBuffer APIs change
> ABI inbetween to require building separate versions for 4.0 and 4.1-4.3?
>
> Also, the patches seem to be missing the makefile parts (both for the
> vlc-android and the vlc project itself) - these would be useful for
> understanding better how it all fits together.
>
> I'll follow up with comments on the individual patches...
>
> // Martin
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