[vlc-devel] [PATCH v4 5/7] libvlc: don't force "dec-dev" with libvlc_media_player_set_xwindow()

Steve Lhomme robux4 at ycbcr.xyz
Tue Mar 17 07:56:44 CET 2020

On 2020-03-16 17:40, Rémi Denis-Courmont wrote:
> Le maanantaina 16. maaliskuuta 2020, 12.14.22 EET Steve Lhomme a écrit :
>> On 2020-03-16 11:01, Rémi Denis-Courmont wrote:
>>> Le maanantaina 16. maaliskuuta 2020, 10.48.13 EET Steve Lhomme a écrit :
>>>> On 2020-03-13 16:46, Rémi Denis-Courmont wrote:
>>>>> Le perjantaina 13. maaliskuuta 2020, 14.28.36 EET Steve Lhomme a écrit :
>>>>>> It should use the default value or the one set with
>>>>>> libvlc_video_set_hw_acceleration().
>>>>> "" *is* the default value.
>>>> If that's the case the current code would be a no-op. But it's not. If
>>>> you set the --dec-dev in the libvlc command-line, using set_xwindow()
>>>> resets that value, for no particular reason.
>>> Actually, it resets that value for very particular reasons - re-enabling
>>> the X11 accelerations that vmem disabled.
>> It should be removed as well.
> No.

Even if not removed, for technical reasons yet to determine, it can use 
the set_hw_acceleration() API instead of this call. So that if the API 
evolves (like setting a different variable or more variables) it's 
transparent to this particular case.

>> There's no reason why it would benefit
>> from hardware decoding. It's still possible to disable it with the
>> proposed API in this patchset.
> Hell no. We are adding a secret handshake to make things work.

What is that secret handshake ?

> Besides, I don't think this API should even exist.

That's your opinion. If needed we can ask the Technical Committee to decide.

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