From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 27 Dec 2025 12:03:39 -0800 Subject: Initial commit --- .../src/joystick/hidapi/SDL_hidapi_stadia.c | 324 +++++++++++++++++++++ 1 file changed, 324 insertions(+) create mode 100644 contrib/SDL-3.2.8/src/joystick/hidapi/SDL_hidapi_stadia.c (limited to 'contrib/SDL-3.2.8/src/joystick/hidapi/SDL_hidapi_stadia.c') diff --git a/contrib/SDL-3.2.8/src/joystick/hidapi/SDL_hidapi_stadia.c b/contrib/SDL-3.2.8/src/joystick/hidapi/SDL_hidapi_stadia.c new file mode 100644 index 0000000..487bf41 --- /dev/null +++ b/contrib/SDL-3.2.8/src/joystick/hidapi/SDL_hidapi_stadia.c @@ -0,0 +1,324 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2025 Sam Lantinga + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "SDL_internal.h" + +#ifdef SDL_JOYSTICK_HIDAPI + +#include "../SDL_sysjoystick.h" +#include "SDL_hidapijoystick_c.h" +#include "SDL_hidapi_rumble.h" + +#ifdef SDL_JOYSTICK_HIDAPI_STADIA + +// Define this if you want to log all packets from the controller +// #define DEBUG_STADIA_PROTOCOL + +enum +{ + SDL_GAMEPAD_BUTTON_STADIA_CAPTURE = 11, + SDL_GAMEPAD_BUTTON_STADIA_GOOGLE_ASSISTANT, + SDL_GAMEPAD_NUM_STADIA_BUTTONS, +}; + +typedef struct +{ + bool rumble_supported; + Uint8 last_state[USB_PACKET_LENGTH]; +} SDL_DriverStadia_Context; + +static void HIDAPI_DriverStadia_RegisterHints(SDL_HintCallback callback, void *userdata) +{ + SDL_AddHintCallback(SDL_HINT_JOYSTICK_HIDAPI_STADIA, callback, userdata); +} + +static void HIDAPI_DriverStadia_UnregisterHints(SDL_HintCallback callback, void *userdata) +{ + SDL_RemoveHintCallback(SDL_HINT_JOYSTICK_HIDAPI_STADIA, callback, userdata); +} + +static bool HIDAPI_DriverStadia_IsEnabled(void) +{ + return SDL_GetHintBoolean(SDL_HINT_JOYSTICK_HIDAPI_STADIA, SDL_GetHintBoolean(SDL_HINT_JOYSTICK_HIDAPI, SDL_HIDAPI_DEFAULT)); +} + +static bool HIDAPI_DriverStadia_IsSupportedDevice(SDL_HIDAPI_Device *device, const char *name, SDL_GamepadType type, Uint16 vendor_id, Uint16 product_id, Uint16 version, int interface_number, int interface_class, int interface_subclass, int interface_protocol) +{ + return SDL_IsJoystickGoogleStadiaController(vendor_id, product_id); +} + +static bool HIDAPI_DriverStadia_InitDevice(SDL_HIDAPI_Device *device) +{ + SDL_DriverStadia_Context *ctx; + + ctx = (SDL_DriverStadia_Context *)SDL_calloc(1, sizeof(*ctx)); + if (!ctx) { + return false; + } + device->context = ctx; + + // Check whether rumble is supported + { + Uint8 rumble_packet[] = { 0x05, 0x00, 0x00, 0x00, 0x00 }; + + if (SDL_hid_write(device->dev, rumble_packet, sizeof(rumble_packet)) >= 0) { + ctx->rumble_supported = true; + } + } + + HIDAPI_SetDeviceName(device, "Google Stadia Controller"); + + return HIDAPI_JoystickConnected(device, NULL); +} + +static int HIDAPI_DriverStadia_GetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id) +{ + return -1; +} + +static void HIDAPI_DriverStadia_SetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id, int player_index) +{ +} + +static bool HIDAPI_DriverStadia_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick) +{ + SDL_DriverStadia_Context *ctx = (SDL_DriverStadia_Context *)device->context; + + SDL_AssertJoysticksLocked(); + + SDL_zeroa(ctx->last_state); + + // Initialize the joystick capabilities + joystick->nbuttons = SDL_GAMEPAD_NUM_STADIA_BUTTONS; + joystick->naxes = SDL_GAMEPAD_AXIS_COUNT; + joystick->nhats = 1; + + return true; +} + +static bool HIDAPI_DriverStadia_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble) +{ + SDL_DriverStadia_Context *ctx = (SDL_DriverStadia_Context *)device->context; + + if (ctx->rumble_supported) { + Uint8 rumble_packet[] = { 0x05, 0x00, 0x00, 0x00, 0x00 }; + + + rumble_packet[1] = (low_frequency_rumble & 0xFF); + rumble_packet[2] = (low_frequency_rumble >> 8); + rumble_packet[3] = (high_frequency_rumble & 0xFF); + rumble_packet[4] = (high_frequency_rumble >> 8); + + if (SDL_HIDAPI_SendRumble(device, rumble_packet, sizeof(rumble_packet)) != sizeof(rumble_packet)) { + return SDL_SetError("Couldn't send rumble packet"); + } + return true; + } else { + return SDL_Unsupported(); + } +} + +static bool HIDAPI_DriverStadia_RumbleJoystickTriggers(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 left_rumble, Uint16 right_rumble) +{ + return SDL_Unsupported(); +} + +static Uint32 HIDAPI_DriverStadia_GetJoystickCapabilities(SDL_HIDAPI_Device *device, SDL_Joystick *joystick) +{ + SDL_DriverStadia_Context *ctx = (SDL_DriverStadia_Context *)device->context; + Uint32 caps = 0; + + if (ctx->rumble_supported) { + caps |= SDL_JOYSTICK_CAP_RUMBLE; + } + return caps; +} + +static bool HIDAPI_DriverStadia_SetJoystickLED(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue) +{ + return SDL_Unsupported(); +} + +static bool HIDAPI_DriverStadia_SendJoystickEffect(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, const void *data, int size) +{ + return SDL_Unsupported(); +} + +static bool HIDAPI_DriverStadia_SetJoystickSensorsEnabled(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, bool enabled) +{ + return SDL_Unsupported(); +} + +static void HIDAPI_DriverStadia_HandleStatePacket(SDL_Joystick *joystick, SDL_DriverStadia_Context *ctx, Uint8 *data, int size) +{ + Sint16 axis; + Uint64 timestamp = SDL_GetTicksNS(); + + // The format is the same but the original FW will send 10 bytes and January '21 FW update will send 11 + if (size < 10 || data[0] != 0x03) { + // We don't know how to handle this report + return; + } + + if (ctx->last_state[1] != data[1]) { + Uint8 hat; + + switch (data[1]) { + case 0: + hat = SDL_HAT_UP; + break; + case 1: + hat = SDL_HAT_RIGHTUP; + break; + case 2: + hat = SDL_HAT_RIGHT; + break; + case 3: + hat = SDL_HAT_RIGHTDOWN; + break; + case 4: + hat = SDL_HAT_DOWN; + break; + case 5: + hat = SDL_HAT_LEFTDOWN; + break; + case 6: + hat = SDL_HAT_LEFT; + break; + case 7: + hat = SDL_HAT_LEFTUP; + break; + default: + hat = SDL_HAT_CENTERED; + break; + } + SDL_SendJoystickHat(timestamp, joystick, 0, hat); + } + + if (ctx->last_state[2] != data[2]) { + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_BACK, ((data[2] & 0x40) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_GUIDE, ((data[2] & 0x10) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_START, ((data[2] & 0x20) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_RIGHT_STICK, ((data[2] & 0x80) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_STADIA_CAPTURE, ((data[2] & 0x01) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_STADIA_GOOGLE_ASSISTANT, ((data[2] & 0x02) != 0)); + } + + if (ctx->last_state[3] != data[3]) { + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SOUTH, ((data[3] & 0x40) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_EAST, ((data[3] & 0x20) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_WEST, ((data[3] & 0x10) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_NORTH, ((data[3] & 0x08) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_SHOULDER, ((data[3] & 0x04) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER, ((data[3] & 0x02) != 0)); + SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_STICK, ((data[3] & 0x01) != 0)); + } + +#define READ_STICK_AXIS(offset) \ + (data[offset] == 0x80 ? 0 : (Sint16)HIDAPI_RemapVal((float)((int)data[offset] - 0x80), 0x01 - 0x80, 0xff - 0x80, SDL_MIN_SINT16, SDL_MAX_SINT16)) + { + axis = READ_STICK_AXIS(4); + SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_LEFTX, axis); + axis = READ_STICK_AXIS(5); + SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_LEFTY, axis); + axis = READ_STICK_AXIS(6); + SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_RIGHTX, axis); + axis = READ_STICK_AXIS(7); + SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_RIGHTY, axis); + } +#undef READ_STICK_AXIS + +#define READ_TRIGGER_AXIS(offset) \ + (Sint16)(((int)data[offset] * 257) - 32768) + { + axis = READ_TRIGGER_AXIS(8); + SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_LEFT_TRIGGER, axis); + axis = READ_TRIGGER_AXIS(9); + SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_RIGHT_TRIGGER, axis); + } +#undef READ_TRIGGER_AXIS + + SDL_memcpy(ctx->last_state, data, SDL_min(size, sizeof(ctx->last_state))); +} + +static bool HIDAPI_DriverStadia_UpdateDevice(SDL_HIDAPI_Device *device) +{ + SDL_DriverStadia_Context *ctx = (SDL_DriverStadia_Context *)device->context; + SDL_Joystick *joystick = NULL; + Uint8 data[USB_PACKET_LENGTH]; + int size = 0; + + if (device->num_joysticks > 0) { + joystick = SDL_GetJoystickFromID(device->joysticks[0]); + } else { + return false; + } + + while ((size = SDL_hid_read_timeout(device->dev, data, sizeof(data), 0)) > 0) { +#ifdef DEBUG_STADIA_PROTOCOL + HIDAPI_DumpPacket("Google Stadia packet: size = %d", data, size); +#endif + if (!joystick) { + continue; + } + + HIDAPI_DriverStadia_HandleStatePacket(joystick, ctx, data, size); + } + + if (size < 0) { + // Read error, device is disconnected + HIDAPI_JoystickDisconnected(device, device->joysticks[0]); + } + return (size >= 0); +} + +static void HIDAPI_DriverStadia_CloseJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick) +{ +} + +static void HIDAPI_DriverStadia_FreeDevice(SDL_HIDAPI_Device *device) +{ +} + +SDL_HIDAPI_DeviceDriver SDL_HIDAPI_DriverStadia = { + SDL_HINT_JOYSTICK_HIDAPI_STADIA, + true, + HIDAPI_DriverStadia_RegisterHints, + HIDAPI_DriverStadia_UnregisterHints, + HIDAPI_DriverStadia_IsEnabled, + HIDAPI_DriverStadia_IsSupportedDevice, + HIDAPI_DriverStadia_InitDevice, + HIDAPI_DriverStadia_GetDevicePlayerIndex, + HIDAPI_DriverStadia_SetDevicePlayerIndex, + HIDAPI_DriverStadia_UpdateDevice, + HIDAPI_DriverStadia_OpenJoystick, + HIDAPI_DriverStadia_RumbleJoystick, + HIDAPI_DriverStadia_RumbleJoystickTriggers, + HIDAPI_DriverStadia_GetJoystickCapabilities, + HIDAPI_DriverStadia_SetJoystickLED, + HIDAPI_DriverStadia_SendJoystickEffect, + HIDAPI_DriverStadia_SetJoystickSensorsEnabled, + HIDAPI_DriverStadia_CloseJoystick, + HIDAPI_DriverStadia_FreeDevice, +}; + +#endif // SDL_JOYSTICK_HIDAPI_STADIA + +#endif // SDL_JOYSTICK_HIDAPI -- cgit v1.2.3