void button_init(void)
{
/* Init used objects first */
queue_init(&button_queue, true);
#ifdef HAVE_BUTTON_DATA
int temp;
#endif
/* hardware inits */
button_init_device();
#ifdef HAVE_BUTTON_DATA
button_read(&temp);
lastbtn = button_read(&temp);
#else
button_read();
lastbtn = button_read();
#endif
reset_poweroff_timer();
#ifdef HAVE_LCD_BITMAP
flipped = false;
#endif
#ifdef HAVE_BACKLIGHT
filter_first_keypress = false;
#ifdef HAVE_REMOTE_LCD
remote_filter_first_keypress = false;
#endif
#endif
#ifdef HAVE_TOUCHSCREEN
last_touchscreen_touch = 0xffff;
#endif
/* Start polling last */
tick_add_task(button_tick);
}
static void button_tick(void)
{
static int count = 0;
static int repeat_speed = REPEAT_INTERVAL_START;
static int repeat_count = 0;
static bool repeat = false;
static bool post = false;
#ifdef HAVE_BACKLIGHT
static bool skip_release = false;
#ifdef HAVE_REMOTE_LCD
static bool skip_remote_release = false;
#endif
#endif
int diff;
int btn;
#ifdef HAVE_BUTTON_DATA
int data = 0;
#else
const int data = 0;
#endif
#if defined(HAS_SERIAL_REMOTE) && !defined(SIMULATOR)
/* Post events for the remote control */
btn = remote_control_rx();
if(btn)
button_try_post(btn, 0);
#endif
#ifdef HAVE_BUTTON_DATA
btn = button_read(&data);
#else
btn = button_read();
#endif
#if defined(HAVE_HEADPHONE_DETECTION)
if (headphones_inserted() != phones_present)
{
/* Use the autoresetting oneshot to debounce the detection signal */
phones_present = !phones_present;
timeout_register(&hp_detect_timeout, btn_detect_callback,
HZ/2, phones_present);
}
#endif
/* Find out if a key has been released */
diff = btn ^ lastbtn;
if(diff && (btn & diff) == 0)
{
#ifdef HAVE_BACKLIGHT
#ifdef HAVE_REMOTE_LCD
if(diff & BUTTON_REMOTE)
if(!skip_remote_release)
button_try_post(BUTTON_REL | diff, data);
else
skip_remote_release = false;
else
#endif
if(!skip_release)
button_try_post(BUTTON_REL | diff, data);
else
skip_release = false;
#else
button_try_post(BUTTON_REL | diff, data);
#endif
}
else
{
if ( btn )
{
/* normal keypress */
if ( btn != lastbtn )
{
post = true;
repeat = false;
repeat_speed = REPEAT_INTERVAL_START;
}
else /* repeat? */
{
if ( repeat )
{
if (!post)
count--;
if (count == 0) {
post = true;
/* yes we have repeat */
if (repeat_speed > REPEAT_INTERVAL_FINISH)
repeat_speed--;
count = repeat_speed;
repeat_count++;
/* Send a SYS_POWEROFF event if we have a device
which doesn't shut down easily with the OFF
key */
#ifdef HAVE_SW_POWEROFF
if ((btn & POWEROFF_BUTTON
#ifdef RC_POWEROFF_BUTTON
|| btn == RC_POWEROFF_BUTTON
#endif
) &&
#if CONFIG_CHARGING && !defined(HAVE_POWEROFF_WHILE_CHARGING)
!charger_inserted() &&
#endif
repeat_count > POWEROFF_COUNT)
{
/* Tell the main thread that it's time to
power off */
sys_poweroff();
/* Safety net for players without hardware
poweroff */
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
if(repeat_count > POWEROFF_COUNT * 10)
power_off();
#endif
}
#endif
}
}
else
{
if (count++ > REPEAT_START)
{
post = true;
repeat = true;
repeat_count = 0;
/* initial repeat */
count = REPEAT_INTERVAL_START;
}
#ifdef HAVE_TOUCHSCREEN
else if (lastdata != data && btn == lastbtn)
{ /* only coordinates changed, post anyway */
if (touchscreen_get_mode() == TOUCHSCREEN_POINT)
post = true;
}
#endif
}
}
if ( post )
{
if (repeat)
{
/* Only post repeat events if the queue is empty,
* to avoid afterscroll effects. */
if (button_try_post(BUTTON_REPEAT | btn, data))
{
#ifdef HAVE_BACKLIGHT
#ifdef HAVE_REMOTE_LCD
skip_remote_release = false;
#endif
skip_release = false;
#endif
post = false;
}
}
else
{
#ifdef HAVE_BACKLIGHT
#ifdef HAVE_REMOTE_LCD
if (btn & BUTTON_REMOTE) {
if (!remote_filter_first_keypress
|| is_remote_backlight_on(false)
#if defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
|| (remote_type()==REMOTETYPE_H300_NONLCD)
#endif
)
button_try_post(btn, data);
else
skip_remote_release = true;
}
else
#endif
if (!filter_first_keypress || is_backlight_on(false)
#if BUTTON_REMOTE
|| (btn & BUTTON_REMOTE)
#endif
)
button_try_post(btn, data);
else
skip_release = true;
#else /* no backlight, nothing to skip */
button_try_post(btn, data);
#endif
post = false;
}
#ifdef HAVE_REMOTE_LCD
if(btn & BUTTON_REMOTE)
remote_backlight_on();
else
#endif
{
backlight_on();
#ifdef HAVE_BUTTON_LIGHT
buttonlight_on();
#endif
}
reset_poweroff_timer();
}
}
else
{
repeat = false;
count = 0;
}
}
lastbtn = btn & ~(BUTTON_REL | BUTTON_REPEAT);
#ifdef HAVE_BUTTON_DATA
lastdata = data;
#endif
}
static void handle_scroll_wheel(int new_scroll)
{
static const signed char scroll_state[4][4] = {
{0, 1, -1, 0},
{-1, 0, 0, 1},
{1, 0, 0, -1},
{0, -1, 1, 0}
};
static int prev_scroll = -1;
static int direction = 0;
static int count = 0;
static long next_backlight_on = 0;
int wheel_keycode = BUTTON_NONE;
int scroll;
static unsigned long wheel_delta = 1ul << 24;
static unsigned long wheel_velocity = 0;
static unsigned long last_wheel_usec = 0;
static int prev_keypost = BUTTON_NONE;
unsigned long usec;
unsigned long v;
if ( prev_scroll == -1 ) {
prev_scroll = new_scroll;
return;
}
scroll = scroll_state[prev_scroll][new_scroll];
prev_scroll = new_scroll;
if (direction != scroll) {
/* direction reversal or was hold - reset all */
direction = scroll;
count = 0;
prev_keypost = BUTTON_NONE;
wheel_velocity = 0;
wheel_delta = 1ul << 24;
return;
}
/* poke backlight every 1/4s of activity */
if (TIME_AFTER(current_tick, next_backlight_on)) {
backlight_on();
reset_poweroff_timer();
next_backlight_on = current_tick + HZ/4;
}
if (++count < WHEEL_BASE_SENSITIVITY)
return;
count = 0;
/* Mini 1st Gen wheel has inverse direction mapping
* compared to 1st..3rd Gen wheel. */
switch (direction) {
case 1:
wheel_keycode = BUTTON_SCROLL_FWD;
break;
case -1:
wheel_keycode = BUTTON_SCROLL_BACK;
break;
default:
/* only happens if we get out of sync */
break;
}
/* have a keycode */
usec = USEC_TIMER;
v = usec - last_wheel_usec;
/* calculate deg/s based upon sensitivity-adjusted interrupt period */
if ((long)v <= 0) {
/* timer wrapped (no activity for awhile), skip acceleration */
v = 0;
wheel_delta = 1ul << 24;
}
else {
if (v > 0xfffffffful/WHEELCLICKS_PER_ROTATION) {
v = 0xfffffffful/WHEELCLICKS_PER_ROTATION; /* check overflow below */
}
v = 360000000ul*WHEEL_BASE_SENSITIVITY / (v*WHEELCLICKS_PER_ROTATION);
if (v > 0xfffffful)
v = 0xfffffful; /* limit to 24 bits */
}
if (v < WHEEL_SMOOTHING_VELOCITY) {
/* very slow - no smoothing */
wheel_velocity = v;
/* ensure backlight never gets stuck for an extended period if tick
* wrapped such that next poke is very far ahead */
next_backlight_on = current_tick - 1;
}
else {
/* some velocity filtering to smooth things out */
wheel_velocity = (7*wheel_velocity + v) / 8;
}
if (queue_empty(&button_queue)) {
int key = wheel_keycode;
if (v >= WHEEL_REPEAT_VELOCITY && prev_keypost == key) {
/* quick enough and same key is being posted more than once in a
* row - generate repeats - use unsmoothed v to guage */
key |= BUTTON_REPEAT;
}
prev_keypost = wheel_keycode;
/* post wheel keycode with wheel data */
queue_post(&button_queue, key,
(wheel_velocity >= WHEEL_ACCEL_START ? (1ul << 31) : 0)
| wheel_delta | wheel_velocity);
/* message posted - reset delta */
wheel_delta = 1ul << 24;
}
else {
/* skipped post - increment delta and limit to 7 bits */
wheel_delta += 1ul << 24;
if (wheel_delta > (0x7ful << 24))
wheel_delta = 0x7ful << 24;
}
last_wheel_usec = usec;
}