I'm poking around the v4l sample application and sample driver v4lcap and wondered it was possible to use this sample driver as a model to "read" a video file through the v4l device. I thought this might be an interesting project to learn a few things... In place of the static color bar image, perhaps one could read a frame from a file instead. I have a question: Are the v4l capture buffers filled as part of an interrupt handler? Or more generally how are interrupts handled in v4l? Reading a file from inside a driver (while normally dumb? needs happen within a process context and so I'd need to figure that out...) I've read a bit about wait queues so perhaps I need to put each frame read onto the scheduler queue (or my own queue) to provide a process context. Then tell the capture to wait until my task has returned. Not sure about any of this as kernel stuff is new to me. --
