Initial commit

1 files changed, 324 insertions, 0 deletions

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 <slouken@libsdl.org>
+
+  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