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Add Teamtap autodetection, to avoid generating ghost events if it is …
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…not present
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@pmandin
pmandin committed Apr 24, 2009
1 parent 53fa4bc commit da622d9
Showing 1 changed file with 152 additions and 10 deletions.
162 changes: 152 additions & 10 deletions src/joystick/mint/SDL_sysjoystick.c
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Expand Up @@ -112,6 +112,96 @@ enum {
#define PORT_JS_UP (1<<3)
#define PORT_JS_FIRE (1<<4)

enum {
TEAMTAP_MAYBE=0,
TEAMTAP_YES,
TEAMTAP_NO
};

/* Teamtap detection values */
static const Uint32 teamtap_ghosts[20][4]={
{1<<JP_UP, /* for this event on joypad 0, port X */
(1<<JP_UP)|(1<<JP_KP0), /* we get this on joypad 1 */
(1<<JP_UP)|(1<<JP_KPNUM)|(1<<JP_KP0), /* this on joypad 2 */
(1<<JP_KPMULT)|(1<<JP_KP0)}, /* this on joypad 3 */
{1<<JP_DOWN,
(1<<JP_DOWN)|(1<<JP_KP8),
(1<<JP_DOWN)|(1<<JP_KP9)|(1<<JP_KP8),
(1<<JP_KP7)|(1<<JP_KP8)},
{1<<JP_LEFT,
(1<<JP_LEFT)|(1<<JP_KP5),
(1<<JP_LEFT)|(1<<JP_KP6)|(1<<JP_KP5),
(1<<JP_KP4)|(1<<JP_KP5)},
{1<<JP_RIGHT,
(1<<JP_RIGHT)|(1<<JP_KP2),
(1<<JP_RIGHT)|(1<<JP_KP3)|(1<<JP_KP2),
(1<<JP_KP1)|(1<<JP_KP2)},
{1<<JP_OPTION,
(1<<JP_OPTION)|(1<<JP_FIRE1)|(1<<JP_FIRE2),
(1<<JP_FIRE0)|(1<<JP_FIRE1)|(1<<JP_FIRE2),
0},
{1<<JP_FIRE0,
(1<<JP_FIRE2)|(1<<JP_FIRE0),
(1<<JP_FIRE0)|(1<<JP_OPTION)|(1<<JP_FIRE2),
(1<<JP_FIRE1)|(1<<JP_FIRE2)},
{1<<JP_FIRE1,
(1<<JP_FIRE0),
(1<<JP_OPTION)|(1<<JP_FIRE0)|(1<<JP_FIRE1),
(1<<JP_FIRE0)|(1<<JP_FIRE2)},
{1<<JP_FIRE2,
(1<<JP_OPTION)|(1<<JP_FIRE0)|(1<<JP_FIRE1)|(1<<JP_FIRE2),
(1<<JP_OPTION),
(1<<JP_FIRE0)|(1<<JP_FIRE1)},
{1<<JP_KP1,
(1<<JP_RIGHT)|(1<<JP_KP1),
(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP3),
(1<<JP_RIGHT)|(1<<JP_KP2)},
{1<<JP_KP2,
(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP2)|(1<<JP_KP3),
(1<<JP_KP3),
(1<<JP_RIGHT)|(1<<JP_KP1)},
{1<<JP_KP3,
(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP2)|(1<<JP_KP3),
(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP2),
0},
{1<<JP_KP4,
(1<<JP_LEFT)|(1<<JP_KP4),
(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP6),
(1<<JP_LEFT)|(1<<JP_KP5)},
{1<<JP_KP5,
(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP5)|(1<<JP_KP6),
(1<<JP_KP6),
(1<<JP_LEFT)|(1<<JP_KP4)},
{1<<JP_KP6,
(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP5)|(1<<JP_KP6),
(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP5),
0},
{1<<JP_KP7,
(1<<JP_DOWN)|(1<<JP_KP7),
(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP9),
(1<<JP_DOWN)|(1<<JP_KP8)},
{1<<JP_KP8,
(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP8)|(1<<JP_KP9),
(1<<JP_KP9),
(1<<JP_DOWN)|(1<<JP_KP7)},
{1<<JP_KP9,
(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP8)|(1<<JP_KP9),
(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP8),
0},
{1<<JP_KPMULT,
(1<<JP_UP)|(1<<JP_KPMULT),
(1<<JP_UP)|(1<<JP_KPNUM),
(1<<JP_UP)|(1<<JP_KP0)},
{1<<JP_KP0,
(1<<JP_UP)|(1<<JP_KPNUM)|(1<<JP_KPMULT)|(1<<JP_KP0),
1<<JP_KPNUM,
(1<<JP_UP)|(1<<JP_KPMULT)},
{1<<JP_KPNUM,
(1<<JP_UP)|(1<<JP_KPNUM)|(1<<JP_KPMULT)|(1<<JP_KP0),
(1<<JP_UP)|(1<<JP_KPMULT)|(1<<JP_KP0),
0},
};

/*--- Types ---*/

typedef struct {
Expand Down Expand Up @@ -155,6 +245,7 @@ static const int jp_buttons[JP_NUM_BUTTONS]={
};

static SDL_bool joypad_ports_enabled=SDL_FALSE;
static int has_teamtap[2]={TEAMTAP_MAYBE,TEAMTAP_MAYBE};

/* Updated joypad ports */
static Uint16 jp_paddles[4];
Expand Down Expand Up @@ -191,11 +282,14 @@ int SDL_SYS_JoystickInit(void)

/* Enable some default joysticks */
if ((cookie_mch == MCH_ST<<16) || ((cookie_mch>>16) == MCH_STE) ||
(cookie_mch == MCH_TT<<16) || (cookie_mch == MCH_F30<<16) ||
(cookie_mch == MCH_ARANYM<<16)) {
(cookie_mch == MCH_TT<<16) || (cookie_mch == MCH_F30<<16) ||
(cookie_mch == MCH_ARANYM<<16))
{
atarijoysticks[IKBD_JOY1].enabled=(SDL_AtariIkbd_enabled!=0);
}
if ((cookie_mch == MCH_STE<<16) || (cookie_mch == MCH_F30<<16)) {
if ((cookie_mch == MCH_STE<<16) || (cookie_mch == MCH_F30<<16) ||
(cookie_mch == MCH_ARANYM<<16))
{
atarijoysticks[PORTA_PAD0].enabled =
atarijoysticks[PORTA_PAD1].enabled =
atarijoysticks[PORTA_PAD2].enabled =
Expand Down Expand Up @@ -351,6 +445,42 @@ int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
return(0);
}

/* Detect Teamtap using ghost events */
static void detect_teamtap(int num_port)
{
int i,j;

/* Check if joypad 1,2,3 triggered but not 0 */
for (i=1; i<4; i++) {
if (jp_joypads[num_port*4+i] && (jp_joypads[num_port*4]==0)) {
has_teamtap[num_port] = TEAMTAP_YES;
return;
}
}

/* Check if joypad 0 on a given port triggered ghost events for
* other joypads
*/
for (i=0; i<20; i++) {
int with_teamtap=1;

if (jp_joypads[num_port*4]!=teamtap_ghosts[i][0])
continue;

/* If any button on first joypad pressed, check other pads */
for (j=1; j<4; j++) {
if ((jp_joypads[num_port*4+j] & teamtap_ghosts[i][j])
==teamtap_ghosts[i][j])
{
with_teamtap = 0;
}
}

has_teamtap[num_port] = (with_teamtap ? TEAMTAP_YES : TEAMTAP_NO);
break;
}
}

void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
{
int numjoystick;
Expand Down Expand Up @@ -416,9 +546,9 @@ void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
case PORTB_PAD2:
case PORTB_PAD3:
{
int numjoypad,i;
int numjoypad,i,numport;

numjoypad = 0;
numjoypad = numport = 0;
switch(numjoystick) {
case PORTA_PAD0:
numjoypad = 0; break;
Expand All @@ -429,16 +559,28 @@ void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
case PORTA_PAD3:
numjoypad = 3; break;
case PORTB_PAD0:
numjoypad = 4; break;
numjoypad = 4; numport = 1; break;
case PORTB_PAD1:
numjoypad = 5; break;
numjoypad = 5; numport = 1; break;
case PORTB_PAD2:
numjoypad = 6; break;
numjoypad = 6; numport = 1; break;
case PORTB_PAD3:
numjoypad = 7; break;
numjoypad = 7; numport = 1; break;
}

curstate=jp_joypads[numjoypad] & 0xabffff;
jp_joypads[numjoypad] &= 0xabffff;

if (has_teamtap[numport]==TEAMTAP_MAYBE) {
detect_teamtap(numport);
}
/* No events for PORTX_PAD[1,2,3] if no teamtap detected */
if (has_teamtap[numport] == TEAMTAP_NO) {
if ((numjoypad & 3)!=0) {
return;
}
}

curstate=jp_joypads[numjoypad];
if (curstate!=prevstate) {
hatstate = SDL_HAT_CENTERED;
if (curstate & (1<<JP_LEFT)) {
Expand Down

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