[vlc-devel] [PATCH 3/4] core: vout: pass an input_thread_t to vout_GetDevice()

Thomas Guillem thomas at gllm.fr
Fri Jan 17 16:00:21 CET 2020


On Fri, Jan 17, 2020, at 15:24, Rémi Denis-Courmont wrote:
> I doubt that the Android VLC app uses an option that's not in any release yet, and if it does, then that's a pretty irresponsible job from whoever dropped a not even beta VLC version on the general public.

Being able to configure the hw decoder via the input exist in VLC 3.0

> 
> And your patch set does not do what you say. It's trying and failing to second-guess the module loader.
> 
> Le 17 janvier 2020 16:13:52 GMT+02:00, Thomas Guillem <thomas at gllm.fr> a écrit :
>> 
>> 
>> On Fri, Jan 17, 2020, at 14:49, Rémi Denis-Courmont wrote:
>>> I don't care about nonexistent apps that use an as yet nonexistent input item option. And by the way, zero is not "a lot".
>> 
>> VLC for Android is not a nonexistent app, check the play store for usage stats.
>> 
>>> 
>>> There are a number of apps ignoring the documentation and setting avcodec-hw in libvlc_new(). They will break no matter what exactly as the documentation warned they could, and they will have to adjust their syntax.
>>> 
>>> I do care about VLC and LibVLC working correctly, so not reintroducing parenting bugs and/or module string matching bugs. 
>> 
>> The dec dev parent will always be the vout, even with my patches. 
>>> 
>>> I also care about performance and thus not recreating the decoder device at every ES selection
>> 
>> The dec dev won't be recreated except if the user configure a different one for each item, which is very unlikely. 
>> 
>>> 
>>> -1.
>>> 
>>> Le 17 janvier 2020 15:18:51 GMT+02:00, Thomas Guillem <thomas at gllm.fr> a écrit :
>>>>  A lot of LibVLC clients have a setting to enable/disable hw decoding. Changing the "avcodec-hw" string by "dec-dev" is quite easy. But having to destroy and create a new libvlc in order to update user preferences is a huge change and require a lot of adaptation in client apps.
>>>> 
>>>> 
>>>> On Fri, Jan 17, 2020, at 12:28, Rémi Denis-Courmont wrote:
>>>>> This "feature" broke anyway since avcodec-hw no longer exists. Users used to be able to set plenty of variables before sout-keep and then input resources were implemented. Moving settings to more global scope is nothing new.
>>>>> 
>>>>> Le 17 janvier 2020 10:30:34 GMT+02:00, Thomas Guillem <thomas at gllm.fr> a écrit :
>>>>>> It's OK to break gapless if the hw dec settings change between 2 inputs. 
>>>>>> 
>>>>>> VLC users were always able to configure hw dec settings via the input (via avcodec-hw and other vars). I thnk we should keep it that way.
>>>>>> 
>>>>>> Do you have an other solution in mind? 
>>>>>> 
>>>>>> On Thu, Jan 16, 2020, at 19:00, Rémi Denis-Courmont wrote:
>>>>>>> Le torstaina 16. tammikuuta 2020, 18.41.36 EET Thomas Guillem a écrit :
>>>>>>>> Optinal, will be used to get the input_thread_t "dec-dev" variable.
>>>>>>> We don't accept output options on input items for years for good reasons. It 
>>>>>>> was totally broken. And it prevents gap-less.
>>>>>>> 
>>>>>>> -- 
>>>>>>> Реми Дёни-Курмон
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>>>>> 
>>>>> -- 
>>>>> Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser ma brièveté. 
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>>> 
>>> -- 
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> 
> -- 
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