Webcam support in Squeak (for OLPC)
corbet at lwn.net
Tue Mar 6 11:02:20 EST 2007
Diego Gomez Deck <DiegoGomezDeck at consultar.com> wrote:
> The Squeak V4L code fallback to use read(), but the performance is not
I'm curious as to why that is. The read() interface is not the
preferred way to go, but it should not perform notably worse than using
> This situation shots those questions:
> - Can the cafe driver capture using MMAP?
The driver supports the V4L2 streaming interface using in-kernel
buffers; it does not currently support user-space buffers.
> - In affirmative case, where I can find a piece of code that make it
> works? (NOTE: The capture.c example provided by the V4L2 api DOESN'T
> work on the OLPC).
I've never actually tried capture.c, but a quick glance suggests that it
should work as long as you don't use the -u flag. Could you tell me
what problems you have run into (off-list might be best) and we'll take
it from there?
Jonathan Corbet / LWN.net / corbet at lwn.net
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