On 19:44 Fri 02 Jan , niamathullah sharief wrote: > > ok alexander...i have an anothere doubt....you told that "usermode > programmer shouldn't care what types of video devices are installed on > the system..And it also simplifies writing drivers for video devices: all the stuff > regarding interactions between kernel and applications is already done > in V4L2" > > but i have an zebronics webcam...the driver for that webcam is "zc0301"...whether this webcam will work without this "zc0301" driver....? No, devices obviously can't work without drivers (more exactly, they can't interact with software without drivers). Btw, zc0301 is also based on V4L2. > " > --- On Fri, 2/1/09, Alexander Potashev <aspotashev@xxxxxxxxx> wrote: > From: Alexander Potashev <aspotashev@xxxxxxxxx> > Subject: Re: xawtv > To: "niamathullah sharief" <shariefbe@xxxxxxxxxxx> > Cc: "Kernel newbies" <kernelnewbies@xxxxxxxxxxxx> > Date: Friday, 2 January, 2009, 6:56 PM > > On 17:49 Fri 02 Jan , niamathullah sharief wrote: > > > > ok...can you tell me what is "video4linux2" is?is it a driver to > capture the image?or something else? > > video4linux2 is Linux kernel subsystem, it registers video device class > and provides an abstract API to the applications, so that a usermode > programmer shouldn't care what types of video devices are installed on > the system. > > And it also simplifies writing drivers for video devices: all the stuff > regarding interactions between kernel and applications is already done > in V4L2. > > Thus, V4L2 is a layer between hardware drivers and kernel API (syscalls > -- mostly ioctl, files in /sys, ...) > > Link grabbed from linux-2.6/Documentation/video4linux/API.html: > http://www.linuxtv.org/downloads/video4linux/API/V4L2_API > > Alexander -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
