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| inputanalog_filter(3) | Arcan Lua API | inputanalog_filter(3) |
NAME
inputanalog_filter - Change filtering / sampling options for a single analog input source.SYNOPSIS
nilinputanalog_filter( devid, axisid, deadzone, lower, upper, buffer, modestr )
DESCRIPTION
This function adds controls for how a specific device filters and forwards input samples for analog sources. These controls are needed to reduce overall system load and latency, as high sampling rates have a tendency to clog event queues - even when not in active use. In order to find the right devid and axisid to use, consult inputanalog_query , and inputanalog_toggle , as well as the applname_input event handler. The bondary values in deadzone , lower and upper are expressed as signed 16-bit values due to legacy. Values within the +- deadzone range will be silently discarded, but not re-normalized. The buffer parameter sets a number of samples that will be collected before filters are applied. modestring can be one out of "drop", "pass", "average", "latest" or "forget". For "drop" all samples will be discarded. For "pass" all samples will be forwarded. For "average" all samples in the buffer will be averaged together, with a single sample emitted. For "latest" only the last sample in the buffer will be forwarded. For "forget" the entire device will be disconnected and ignored. This is mainly to allow other subsystems to have access to the device for input platforms that enforce exclusive access on such devices. This will be treated as a device-unplug scenario, causing related events to be emitted.SEE ALSO:
inputanalog_query(3) inputanalog_toggle(3)| June 2022 | iodev |
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