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Fixed bug 2090 - Some joystick inputs are delayed on FreeBSD

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kikuchan

Some joysticks with high sampling rate need to be read() more fast,
otherwise it delay user inputs due to internal queue.
Especially, an app that issues SDL_PollEvent() not so frequent
This commit is contained in:
Sam Lantinga 2013-09-06 20:54:14 -07:00
parent 10ffa28a28
commit dc9ddf1f61
1 changed files with 80 additions and 84 deletions
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164
src/joystick/bsd/SDL_sysjoystick.c
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@ -446,48 +446,47 @@ SDL_SYS_JoystickUpdate(SDL_Joystick * joy)
static int x, y, xmin = 0xffff, ymin = 0xffff, xmax = 0, ymax = 0; static int x, y, xmin = 0xffff, ymin = 0xffff, xmax = 0, ymax = 0;
if (joy->hwdata->type == BSDJOY_JOY) { if (joy->hwdata->type == BSDJOY_JOY) {
if (read(joy->hwdata->fd, &gameport, sizeof gameport) != while (read(joy->hwdata->fd, &gameport, sizeof gameport) == sizeof gameport) {
sizeof gameport) if (abs(x - gameport.x) > 8) {
return; x = gameport.x;
if (abs(x - gameport.x) > 8) { if (x < xmin) {
x = gameport.x; xmin = x;
if (x < xmin) { }
xmin = x; if (x > xmax) {
xmax = x;
}
if (xmin == xmax) {
xmin--;
xmax++;
}
v = (Sint32) x;
v -= (xmax + xmin + 1) / 2;
v *= 32768 / ((xmax - xmin + 1) / 2);
SDL_PrivateJoystickAxis(joy, 0, v);
} }
if (x > xmax) { if (abs(y - gameport.y) > 8) {
xmax = x; y = gameport.y;
if (y < ymin) {
ymin = y;
}
if (y > ymax) {
ymax = y;
}
if (ymin == ymax) {
ymin--;
ymax++;
}
v = (Sint32) y;
v -= (ymax + ymin + 1) / 2;
v *= 32768 / ((ymax - ymin + 1) / 2);
SDL_PrivateJoystickAxis(joy, 1, v);
} }
if (xmin == xmax) { if (gameport.b1 != joy->buttons[0]) {
xmin--; SDL_PrivateJoystickButton(joy, 0, gameport.b1);
xmax++;
} }
v = (Sint32) x; if (gameport.b2 != joy->buttons[1]) {
v -= (xmax + xmin + 1) / 2; SDL_PrivateJoystickButton(joy, 1, gameport.b2);
v *= 32768 / ((xmax - xmin + 1) / 2);
SDL_PrivateJoystickAxis(joy, 0, v);
}
if (abs(y - gameport.y) > 8) {
y = gameport.y;
if (y < ymin) {
ymin = y;
} }
if (y > ymax) {
ymax = y;
}
if (ymin == ymax) {
ymin--;
ymax++;
}
v = (Sint32) y;
v -= (ymax + ymin + 1) / 2;
v *= 32768 / ((ymax - ymin + 1) / 2);
SDL_PrivateJoystickAxis(joy, 1, v);
}
if (gameport.b1 != joy->buttons[0]) {
SDL_PrivateJoystickButton(joy, 0, gameport.b1);
}
if (gameport.b2 != joy->buttons[1]) {
SDL_PrivateJoystickButton(joy, 1, gameport.b2);
} }
return; return;
} }
@ -495,65 +494,62 @@ SDL_SYS_JoystickUpdate(SDL_Joystick * joy)
rep = &joy->hwdata->inreport; rep = &joy->hwdata->inreport;
if (read(joy->hwdata->fd, REP_BUF_DATA(rep), rep->size) != rep->size) { while (read(joy->hwdata->fd, REP_BUF_DATA(rep), rep->size) == rep->size) {
return;
}
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111) || defined(__FreeBSD_kernel__) #if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111) || defined(__FreeBSD_kernel__)
hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input, rep->rid); hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input, rep->rid);
#else #else
hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input); hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input);
#endif #endif
if (hdata == NULL) { if (hdata == NULL) {
fprintf(stderr, "%s: Cannot start HID parser\n", joy->hwdata->path); /*fprintf(stderr, "%s: Cannot start HID parser\n", joy->hwdata->path);*/
return; continue;
} }
for (nbutton = 0; hid_get_item(hdata, &hitem) > 0;) { for (nbutton = 0; hid_get_item(hdata, &hitem) > 0;) {
switch (hitem.kind) { switch (hitem.kind) {
case hid_input: case hid_input:
switch (HID_PAGE(hitem.usage)) { switch (HID_PAGE(hitem.usage)) {
case HUP_GENERIC_DESKTOP: case HUP_GENERIC_DESKTOP:
{ {
unsigned usage = HID_USAGE(hitem.usage); unsigned usage = HID_USAGE(hitem.usage);
int joyaxe = usage_to_joyaxe(usage); int joyaxe = usage_to_joyaxe(usage);
if (joyaxe >= 0) { if (joyaxe >= 0) {
naxe = joy->hwdata->axis_map[joyaxe]; naxe = joy->hwdata->axis_map[joyaxe];
/* scaleaxe */ /* scaleaxe */
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem); v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
v -= (hitem.logical_maximum + v -= (hitem.logical_maximum +
hitem.logical_minimum + 1) / 2; hitem.logical_minimum + 1) / 2;
v *= 32768 / v *= 32768 /
((hitem.logical_maximum - ((hitem.logical_maximum -
hitem.logical_minimum + 1) / 2); hitem.logical_minimum + 1) / 2);
if (v != joy->axes[naxe]) { if (v != joy->axes[naxe]) {
SDL_PrivateJoystickAxis(joy, naxe, v); SDL_PrivateJoystickAxis(joy, naxe, v);
}
} else if (usage == HUG_HAT_SWITCH) {
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
SDL_PrivateJoystickHat(joy, 0,
hatval_to_sdl(v) -
hitem.logical_minimum);
} }
} else if (usage == HUG_HAT_SWITCH) { break;
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
SDL_PrivateJoystickHat(joy, 0,
hatval_to_sdl(v) -
hitem.logical_minimum);
} }
case HUP_BUTTON:
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
if (joy->buttons[nbutton] != v) {
SDL_PrivateJoystickButton(joy, nbutton, v);
}
nbutton++;
break; break;
default:
continue;
} }
case HUP_BUTTON:
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
if (joy->buttons[nbutton] != v) {
SDL_PrivateJoystickButton(joy, nbutton, v);
}
nbutton++;
break; break;
default: default:
continue; break;
} }
break;
default:
break;
} }
hid_end_parse(hdata);
} }
hid_end_parse(hdata);
return;
} }
/* Function to close a joystick after use */ /* Function to close a joystick after use */