STRUCT FF_ENVELOPE(9) Input Subsystem STRUCT FF_ENVELOPE(9) NAME struct_ff_envelope - generic force-feedback effect envelope SYNOPSIS struct ff_envelope { __u16 attack_length; __u16 attack_level; __u16 fade_length; __u16 fade_level; }; MEMBERS attack_length duration of the attack (ms) attack_level level at the beginning of the attack fade_length duration of fade (ms) fade_level level at the end of fade DESCRIPTION The attack_level and fade_level are absolute values; when applying envelope force-feedback core will convert to positive/negative value based on polarity of the default level of the effect. Valid range for the attack and fade levels is 0x0000 - 0x7fff COPYRIGHT Kernel Hackers Manual 2.6. November 2013 STRUCT FF_ENVELOPE(9)[top]
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