On Mon, Jul 2, 2018 at 4:25 PM Baruch Siach <baruch at tkos.co.il> wrote:
>
> Hi Jeffy,
>
> On Fri, May 25, 2018 at 05:52:57PM +0800, JeffyChen wrote:
> > On 05/25/2018 02:10 PM, Tomasz Figa wrote:
> > > On Thu, May 24, 2018 at 9:18 PM Baruch Siach <baruch at tkos.co.il> wrote:
> > > > It looks like only v2 supports h.264 encoding. Does the v2 plugin work
> > > > with the rk3288?
> > >
> > > Hmm, looks like I missed the part about h264 in your original message (only
> > > noticed encoding). We didn't have a need to encode h264 on rk3288 devices.
> > > The need showed up only later when we were working on rk3399. This made
> > > both the driver and plugin for rk3288 lack h264 support.
> > >
> > > AFAICT the hardware programming interface differs between rk3288 and
> > > rk3399, so v2 might not work, but maybe you just need to reshuffle some
> > > registers.
> > >
> > > It's also possible that Rockchip has some code for it. Jeffy, do you know
> > > if there is h264 driver code and plugin for rk3288 available somewhere
> > > (based on the driver developed for Chrome OS 3.14 kernel)?
> >
> > well, i do saw a h264e driver for rk3288 in cros kernel:
> > chromiumos/src/third_party/kernel/local/drivers/media/platform/rockchip-vpu#
> > ls rk3288_vpu_hw_h264e.c
> >
> > and the related struct defined in v2 plugin:
> > libv4l-rockchip_v2/libvepu/common/rk_venc.h:120:struct
> > rk3288_h264e_reg_params {
>
> Thanks for the reference.
>
> I'm trying to build the v4l plugin stand alone. But in the repo I only see a
> Makefile.am file. I guess it integrates with the higher level build system of
> CromiumOS.
>
> Do you have any idea how to build this v4l plugin code stand-alone?
It's supposed to be built as a part of v4l-utils
(http://git.linuxtv.org/v4l-utils.git), which includes libv4l. We
build it with 1.6.0, but I guess newer versions may work too.
For reference, here's our ebuild (for Gentoo portage) to build it:
https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/master/media-libs/libv4lplugins/libv4lplugins-9999.ebuild
Best regards,
Tomasz
