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Set the gain to 75% before emitting rumbles

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Denis 2023-11-26 18:22:31 +01:00
parent 6ce3c187a6
commit 606015da82
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GPG key ID: DD9B63F805CF5C03
1 changed files with 25 additions and 6 deletions
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31
input_dev.c
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@ -542,8 +542,6 @@ static void input_udev(
}
};
const int has_ff = libevdev_has_event_type(ctx->dev, EV_FF);
// start the incoming events read thread
pthread_t incoming_events_thread;
const int incoming_events_thread_creation = pthread_create(&incoming_events_thread, NULL, input_read_thread_func, (void*)ctx);
@ -552,6 +550,25 @@ static void input_udev(
continue;
}
const int has_ff = libevdev_has_event_type(ctx->dev, EV_FF);
if (has_ff) {
printf("Setting master gain to 75%%...\n");
const struct input_event gain = {
.type = EV_FF,
.code = FF_GAIN,
.value = 0xC000, // [0, 0xFFFF])
};
const int gain_set_res = write(fd, (const void*)&gain, sizeof(gain));
if (gain_set_res != sizeof(gain)) {
fprintf(stderr, "Unable to adjust gain for force-feedback: %d\n", gain_set_res);
}
} else {
fprintf(stderr, "Unable to adjust gain for force-feedback: EV_FF not supported.\n");
}
// while the incoming events thread run...
while ((ctx->flags & INPUT_CTX_FLAGS_READ_TERMINATED) == 0) {
if (has_ff) {
@ -572,7 +589,7 @@ static void input_udev(
};
const int rumble_stop_res = write(fd, (const void*) &rumble_stop, sizeof(rumble_stop));
if (rumble_stop_res < 0) {
if (rumble_stop_res != sizeof(rumble_stop)) {
fprintf(stderr, "Unable to stop the previous rumble: %d\n", rumble_stop_res);
}
}
@ -580,7 +597,7 @@ static void input_udev(
current_effect.u.rumble.strong_magnitude = rumble_msg->strong_magnitude;
current_effect.u.rumble.weak_magnitude = rumble_msg->weak_magnitude;
printf("Rumble strong_magnitude: %u, weak_magnitude: %u\n", (unsigned)current_effect.u.rumble.strong_magnitude, (unsigned)current_effect.u.rumble.weak_magnitude);
printf("Rumble event received -- strong_magnitude: %u, weak_magnitude: %u\n", (unsigned)current_effect.u.rumble.strong_magnitude, (unsigned)current_effect.u.rumble.weak_magnitude);
const int effect_upload_res = ioctl(fd, EVIOCSFF, &current_effect);
if (effect_upload_res == 0) {
@ -590,8 +607,10 @@ static void input_udev(
.value = 1,
};
const int effect_start_res = write(fd, (const void*) &rumble_play, sizeof(rumble_play));
if (effect_start_res < 0) {
const int effect_start_res = write(fd, (const void*)&rumble_play, sizeof(rumble_play));
if (effect_start_res == sizeof(rumble_play)) {
printf("Rumble effect play requested to driver\n");
} else {
fprintf(stderr, "Unable to write input event starting the rumble: %d\n", effect_start_res);
}
} else {