[2.38][GStreamer][WesterosQuirk] set low-latency-mode property

[goruklu]

Amlogic recently added "low-latency-mode" property to their Westeros sink. This property needs to be enabled to achieve the lowest latency when playing webRTC cloud gaming streams.

[vivienne-w]

I see this low latency mode only supports AVC and AV1 codecs, so wouldn't this break playback of unsupported codecs?

See: westeros-sink-soc.c#806

wstLowLatencyModePushFrame() would silently fail here: westeros-sink-soc.c#2229 because wstLowLatencyModeInit() wouldn't set g_vcodec->ext_handle here: westeros-sink-soc.c#6822

[modeveci]

@vivienne-w can we park this PR for a while? our team will provide more details regarding this PR and related 2.46 PR.

[vivienne-w]

@modeveci yeah, no problem

[goruklu]

We will try to re-use the immediate-mode property for Amlogic Westeros-sink as well.
Westeros sink will have to handle different codecs properly.

[eocanha]

Regarding the immediate-output property (I'm assuming you're talking about that one), I'd like to comment that it's currently causing issues on live game streaming for some online services. This is not directly related to this PR, but I still think it's worth to mention.

Have a look at #1572 (comment)