Trent Piepho <xyzzy@xxxxxxxxxxxxx> writes: > The signal recevied by the ir receiver contains glitches. Depending on the > receiver there can be quite a few. It is also not trivial to turn the raw > signal sent by the remote into a digital value, even if you know what to > expect. It takes digital signal processing techniques to turn the messy > sequence of inaccurate mark and space lengths into a best guess at what > digital code the remote sent. This is of course true. Except that most receivers do that in hardware, the receiver/demodular chip such as TSOP1838 does it. If you receive with a phototransistor or a photodiode feeding some sort of ADC device (not a very smart design), sure - you have to do this yourself. I have never heard of such receiver, though. > One thing that could be done, unless it has changed much since I wrote it > 10+ years ago, is to take the mark/space protocol the ir device uses and sent > that data to lircd via the input layer. It would be less efficient, but > would avoid another kernel interface. Of course the input layer to lircd > interface would be somewhat different than other input devices, so > it's not entirely correct to say another interface is avoided. IOW, it would be worse, wouldn't it? -- Krzysztof Halasa -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
