[meta-freescale] imx-vpu-hantro: broken A/V sync with VP8 playback

[Carlos Rafael Giani]

I recently noticed that VP8 playback does not work correctly with 
imx-vpu-hantro . If a VP8 stream contains alternate reference (altref) 
frames, then imx-vpu-hantro decodes them correctly, but does not inform 
about the fact that they are altref frames. This is a problem, because 
altref frames are supposed to be decoded, and NOT shown. In particular, 
timestamps should not be increased because of a decoded altref frame. 
They essentially are for internal use only.

However, because the callers do not know that a frame is an altref one, 
they don't skip them like they should. As a result, A/V sync gradually 
gets worse over time.

Is there any newer imx-vpu-hantro version that fixes this? The necessary 
fields are already there. Specifically, there's isGoldenOrAlternate in 
the FRAME struct in openmax_il/source/decoder/codec.h . However, it is 
never set to TRUE . I did some digging, and the only part that sets any 
flag like that is in vp8decmcapi.c (which is not used), and even then, 
this concerns itself only with golden frames, not altref ones.