From: Adrian Cox <adrian@humboldt.co.uk>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Userspace Camera Drivers
Date: Tue, 31 Aug 2004 11:09:46 +0100 [thread overview]
Message-ID: <1093946986.16190.96.camel@localhost> (raw)
The pwcx debate has made me wonder why USB camera drivers are in the
kernel. I can think of two reasons:
1) libusb doesn't support isochronous transactions.
2) V4L is the only generally accepted video capture API.
IEEE1394 cameras took a different path:
1) An isochronous transaction manager for kernel space -
http://www.linux1394.org/video1394.php
2) A userspace library to access the cameras -
http://sourceforge.net/projects/libdc1394/
Problem 1 may be fixed by Mac Cody's code, though I've not tried this
myself yet:
http://sourceforge.net/mailarchive/message.php?msg_id=8816704
Is there an existing library that would handle problem 2? Gstreamer
might do it, but the documentation is much more oriented to media
playback than machine vision.
- Adrian Cox
Humboldt Solutions Ltd.
reply other threads:[~2004-08-31 10:09 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1093946986.16190.96.camel@localhost \
--to=adrian@humboldt.co.uk \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.