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- wheezy 3.2.78-1
STRUCT FF_ENVELOPE(9) | Input Subsystem | STRUCT FF_ENVELOPE(9) |
NAME¶
struct_ff_envelope - generic force-feedback effect envelopeSYNOPSIS¶
struct ff_envelope { __u16 attack_length; __u16 attack_level; __u16 fade_length; __u16 fade_level; };
MEMBERS¶
attack_lengthduration 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 - 0x7fffCOPYRIGHT¶
March 2016 | Kernel Hackers Manual 3.2. |