>> Let me explain why I created a new thread. >> My company is engaged in the monitoring of TV air. All TV channels are >> recorded 24/7 for further analysis. But some local TV channels change >> the standard over time (SECAM->PAL, PAL->SECAM). So the recording >> software must be notified about these changes to set a new standard and >> record the picture but not the noise. > > OK, fair enough.
This is a perfectly reasonable use case, but since we don't do this with any other devices we probably need to decide whether this really should be the responsibility of the kernel at all, or whether it really should be done in userland. Doing it in userland would be trivial (even just a script which periodically runs QUERYSTD in a loop would accomplish the same thing), and the extra complexity of having a thread combined with the inconsistent behavior with all the other drivers might make it more worthwhile to do it in userland. If it were hooked to an interrupt line on the video decoder, I could certainly see doing it in kernel, but for something like this the loop that checks the standard could just as easily be done in userland. Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
