Hi everybody,
As my last posting said, I am now busy coding the vbi driver for bttv2.
The vbi spec for v4l2 has multiple capturing opens, and has the
resources being locked by the first open to S_FMT a format requiring the
resources. The discussion we had earlier always had the resources being
locked at STREAMON time.
Here is my take on S_FMT vs STREAMON locking:
S_FMT - only need memory for two capture resources.
- better defined capture states in capture engine.
- no way of releasing resources without closing the open.
- allows "feedback" so the app can determine which resources are
currently available.
STREAMON - easier to do default contexts.
- only lock the resources when we actually need them.
Any (more) comments suggestions appreciated.
(Gerd, could you please repost the URL for the multiple opens draft? I
accidentally nuked that one.)
Thanks
-justin
