AW: How to get HW decoder singleton(playbin2 or playbin3)?

[Maurer, Marie]

Hi Juergen,

I think the following page is helpful:

https://gstreamer.freedesktop.org/documentation/design/states.html

There it is mentioned:

NULL -> READY:

- The element must check if the resources it needs are available. Device sinks and sources typically try to probe the device to constrain their caps.

- The element opens the device, this is needed if the previous step requires the device to be opened.

and

READY -> NULL:

- Elements close devices

- Elements reset any internal state.

Best regards,

Marie

-----Ursprüngliche Nachricht-----
Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Juergen Sachs
Gesendet: Donnerstag, 14. Juni 2018 16:08
An: gstreamer-devel at lists.freedesktop.org
Betreff: Re: How to get HW decoder singleton(playbin2 or playbin3)?

I think this is a problem with the HW decoder sink elements. The HW sinks should request theres HW resources in READY->PAUSED and release the resources in PAUSE->READY state transition.
If doing so, multiple sinks can coexist. 
As far as we have observed, in nearly all cases there ist only one oth the sink in PAUSED resp. PLAYING state.
So this issue should be adressed to the author of the hardware sink elements.



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