[vlc-devel] [PATCH 1/2] decoder device: allow modules to create a decoder device

[Rémi Denis-Courmont]

Hi,

VDPAU needs an X11 server, not a window. Indeed VA does not even need a display server, if render device nodes are supported.

Le 26 octobre 2019 10:19:08 GMT+01:00, Alexandre Janniaux <ajanni at videolabs.io> a écrit :
>Hi,
>
>On Fri, Oct 25, 2019 at 02:44:22PM +0200, Steve Lhomme wrote:
>> On 2019-10-25 14:37, Steve Lhomme wrote:
>> > On 2019-10-25 14:33, Rémi Denis-Courmont wrote:
>> > > Don't remove the used qualifier.
>> >
>> > OK
>> >
>> > > And this won't work anyway because sout does not have, and should
>> > > not need a window. This needs a different function.
>> >
>> > It works fine with QSV is my work branch (hardware decoding,
>hardware
>> > encoding, sharing the same decoder device).
>>
>> NVDEC, D3D11 and D3D9 don't use the window in their decoder device.
>So the
>> hardware acceleration can be used without a window.
>>
>> VAAPI and VDPAU seem to need a window. I think with VAAPI there might
>be
>> ways around this as QSV might be usable without a window at all.
>
>I don't know for VDPAU but VAAPI can work with DRM and
>thus avoid using a window. It means that you need to
>synchronize the DRM device in the filter chain for things
>like vulkan or OpenGL, and probably use the same for the
>encoder.
>
>Regards,
>--
>Alexandre Janniaux
>Videolabs
>
>>
>> > The no-window comment is also mentioned in the next patch.
>> >
>> > > Le 25 octobre 2019 15:31:06 GMT+03:00, Steve Lhomme
>> > > <robux4 at ycbcr.xyz> a écrit :
>> > >
>> > >     Like the transcoder or the mosaic bridge.
>> > >
>------------------------------------------------------------------------
>> > >       include/vlc_codec.h | 2 +-
>> > >       src/libvlccore.sym  | 1 +
>> > >       2 files changed, 2 insertions(+), 1 deletion(-)
>> > >
>> > >     diff --git a/include/vlc_codec.h b/include/vlc_codec.h
>> > >     index 6649ef94cc2..c51d4eba1a7 100644
>> > >     --- a/include/vlc_codec.h
>> > >     +++ b/include/vlc_codec.h
>> > >     @@ -604,7 +604,7 @@ typedef int
>> > > (*vlc_decoder_device_Open)(vlc_decoder_device *device,
>> > >        * This function will be hidden in the future. It is now
>used
>> > > by opengl vout
>> > >        * module as a transition.
>> > >        */
>> > >     -VLC_USED vlc_decoder_device *
>> > >     +VLC_API vlc_decoder_device *
>> > >       vlc_decoder_device_Create(vout_window_t *window);
>> > >       /**
>> > >     diff --git a/src/libvlccore.sym b/src/libvlccore.sym
>> > >     index d1a048be988..ce18e3ad6b6 100644
>> > >     --- a/src/libvlccore.sym
>> > >     +++ b/src/libvlccore.sym
>> > >     @@ -83,6 +83,7 @@ decoder_AbortPictures
>> > >       decoder_NewAudioBuffer
>> > >       decoder_UpdateVideoFormat
>> > >       decoder_UpdateVideoOutput
>> > >     +vlc_decoder_device_Create
>> > >       vlc_decoder_device_Hold
>> > >       vlc_decoder_device_Release
>> > >       demux_PacketizerDestroy
>> > >
>> > >
>> > > --
>> > > Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez
>> > > excuser ma brièveté.
>> > >
>> > > _______________________________________________
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-- 
Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser ma brièveté.
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