On 10 Apr 2002, Gerd Knorr wrote: > Alan McIvor wrote: > > Hi, > > > > At the hardware level, the bt878 has a register which says whether or > > not there is a video signal on the input (bit BT848_DSTATUS_PRES in > > the dstat register), but I don't think this is available in user > > space. > > video_tuner->signal = (BT848_DSTATUS & BT848_DSTATUS_HLOC) ? 0xFFFF : 0; Not very useful. You can't query the tuner unless you have it selected as the input. So if your card doesn't have a tuner, or you are using the composite or s-video input, this won't work. Most tuners have AFC bits that tell you if your frequency is too high or too low, which you can't access via the driver either.
