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Fixed input from the MayFlash GameCube adapter with version 7 firmware

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(cherry picked from commit 7457857304)
This commit is contained in:
Sam Lantinga
2025-06-03 10:54:10 -07:00
parent d726e98596
commit af83c442d3
1 changed files with 52 additions and 54 deletions
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106
src/joystick/hidapi/SDL_hidapi_gamecube.c
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@@ -31,7 +31,9 @@
#ifdef SDL_JOYSTICK_HIDAPI_GAMECUBE
// Define this if you want to log all packets from the controller
// #define DEBUG_GAMECUBE_PROTOCOL
#if 0
#define DEBUG_GAMECUBE_PROTOCOL
#endif
#define MAX_CONTROLLERS 4
@@ -119,22 +121,15 @@ static bool HIDAPI_DriverGameCube_InitDevice(SDL_HIDAPI_Device *device)
}
device->context = ctx;
ctx->joysticks[0] = 0;
ctx->joysticks[1] = 0;
ctx->joysticks[2] = 0;
ctx->joysticks[3] = 0;
ctx->rumble[0] = rumbleMagic;
ctx->useRumbleBrake = false;
if (device->vendor_id != USB_VENDOR_NINTENDO) {
ctx->pc_mode = true;
}
if (ctx->pc_mode) {
for (i = 0; i < MAX_CONTROLLERS; ++i) {
ResetAxisRange(ctx, i);
HIDAPI_JoystickConnected(device, &ctx->joysticks[i]);
}
ResetAxisRange(ctx, 0);
HIDAPI_JoystickConnected(device, &ctx->joysticks[0]);
} else {
// This is all that's needed to initialize the device. Really!
if (SDL_hid_write(device->dev, &initMagic, sizeof(initMagic)) != sizeof(initMagic)) {
@@ -204,69 +199,61 @@ static void HIDAPI_DriverGameCube_SetDevicePlayerIndex(SDL_HIDAPI_Device *device
{
}
static void HIDAPI_DriverGameCube_HandleJoystickPacket(SDL_HIDAPI_Device *device, SDL_DriverGameCube_Context *ctx, const Uint8 *packet, int size)
static void HIDAPI_DriverGameCube_HandleJoystickPacket(SDL_HIDAPI_Device *device, SDL_DriverGameCube_Context *ctx, const Uint8 *packet, bool invert_c_stick)
{
SDL_Joystick *joystick;
Uint8 i, v;
const Uint8 i = 0; // We have a separate context for each connected controller in PC mode, just use the first index
Uint8 v;
Sint16 axis_value;
Uint64 timestamp = SDL_GetTicksNS();
if (size != 10) {
return; // How do we handle this packet?
}
i = packet[0] - 1;
if (i >= MAX_CONTROLLERS) {
return; // How do we handle this packet?
}
joystick = SDL_GetJoystickFromID(ctx->joysticks[i]);
if (!joystick) {
// Hasn't been opened yet, skip
return;
}
#define READ_BUTTON(off, flag, button) \
SDL_SendJoystickButton( \
timestamp, \
joystick, \
button, \
#define READ_BUTTON(off, flag, button) \
SDL_SendJoystickButton( \
timestamp, \
joystick, \
button, \
((packet[off] & flag) != 0));
READ_BUTTON(1, 0x02, 0) // A
READ_BUTTON(1, 0x04, 1) // B
READ_BUTTON(1, 0x08, 3) // Y
READ_BUTTON(1, 0x01, 2) // X
READ_BUTTON(2, 0x80, 4) // DPAD_LEFT
READ_BUTTON(2, 0x20, 5) // DPAD_RIGHT
READ_BUTTON(2, 0x40, 6) // DPAD_DOWN
READ_BUTTON(2, 0x10, 7) // DPAD_UP
READ_BUTTON(2, 0x02, 8) // START
READ_BUTTON(1, 0x80, 9) // RIGHTSHOULDER
READ_BUTTON(0, 0x02, 0) // A
READ_BUTTON(0, 0x04, 1) // B
READ_BUTTON(0, 0x08, 3) // Y
READ_BUTTON(0, 0x01, 2) // X
READ_BUTTON(1, 0x80, 4) // DPAD_LEFT
READ_BUTTON(1, 0x20, 5) // DPAD_RIGHT
READ_BUTTON(1, 0x40, 6) // DPAD_DOWN
READ_BUTTON(1, 0x10, 7) // DPAD_UP
READ_BUTTON(1, 0x02, 8) // START
READ_BUTTON(0, 0x80, 9) // RIGHTSHOULDER
/* These two buttons are for the bottoms of the analog triggers.
* More than likely, you're going to want to read the axes instead!
* -flibit
*/
READ_BUTTON(1, 0x20, 10) // TRIGGERRIGHT
READ_BUTTON(1, 0x10, 11) // TRIGGERLEFT
READ_BUTTON(0, 0x20, 10) // TRIGGERRIGHT
READ_BUTTON(0, 0x10, 11) // TRIGGERLEFT
#undef READ_BUTTON
#define READ_AXIS(off, axis, invert) \
v = invert ? (0xff - packet[off]) : packet[off]; \
if (v < ctx->min_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis]) \
ctx->min_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis] = v; \
if (v > ctx->max_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis]) \
ctx->max_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis] = v; \
#define READ_AXIS(off, axis, invert) \
v = (invert) ? (0xff - packet[off]) : packet[off]; \
if (v < ctx->min_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis]) \
ctx->min_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis] = v; \
if (v > ctx->max_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis]) \
ctx->max_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis] = v; \
axis_value = (Sint16)HIDAPI_RemapVal(v, ctx->min_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis], ctx->max_axis[i * SDL_GAMEPAD_AXIS_COUNT + axis], SDL_MIN_SINT16, SDL_MAX_SINT16); \
SDL_SendJoystickAxis( \
timestamp, \
joystick, \
SDL_SendJoystickAxis( \
timestamp, \
joystick, \
axis, axis_value);
READ_AXIS(3, SDL_GAMEPAD_AXIS_LEFTX, 0)
READ_AXIS(4, SDL_GAMEPAD_AXIS_LEFTY, 1)
READ_AXIS(6, SDL_GAMEPAD_AXIS_RIGHTX, 0)
READ_AXIS(5, SDL_GAMEPAD_AXIS_RIGHTY, 1)
READ_AXIS(7, SDL_GAMEPAD_AXIS_LEFT_TRIGGER, 0)
READ_AXIS(8, SDL_GAMEPAD_AXIS_RIGHT_TRIGGER, 0)
READ_AXIS(2, SDL_GAMEPAD_AXIS_LEFTX, 0)
READ_AXIS(3, SDL_GAMEPAD_AXIS_LEFTY, 1)
READ_AXIS(5, SDL_GAMEPAD_AXIS_RIGHTX, invert_c_stick ? 1 : 0)
READ_AXIS(4, SDL_GAMEPAD_AXIS_RIGHTY, invert_c_stick ? 0 : 1)
READ_AXIS(6, SDL_GAMEPAD_AXIS_LEFT_TRIGGER, 0)
READ_AXIS(7, SDL_GAMEPAD_AXIS_RIGHT_TRIGGER, 0)
#undef READ_AXIS
}
@@ -365,7 +352,18 @@ static bool HIDAPI_DriverGameCube_UpdateDevice(SDL_HIDAPI_Device *device)
HIDAPI_DumpPacket("Nintendo GameCube packet: size = %d", packet, size);
#endif
if (ctx->pc_mode) {
HIDAPI_DriverGameCube_HandleJoystickPacket(device, ctx, packet, size);
if (size == 10) {
// This is the older firmware
// The first byte is the index of the connected controller
// The C stick has an inverted value range compared to the left stick
HIDAPI_DriverGameCube_HandleJoystickPacket(device, ctx, &packet[1], true);
} else if (size == 9) {
// This is the newer firmware (version 0x7)
// The C stick has the same value range compared to the left stick
HIDAPI_DriverGameCube_HandleJoystickPacket(device, ctx, packet, false);
} else {
// How do we handle this packet?
}
} else {
HIDAPI_DriverGameCube_HandleNintendoPacket(device, ctx, packet, size);
}