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@@ -0,0 +1,348 @@
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+/*
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+ Simple DirectMedia Layer
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+ Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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+
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+ This software is provided 'as-is', without any express or implied
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+ warranty. In no event will the authors be held liable for any damages
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+ arising from the use of this software.
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+
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+ Permission is granted to anyone to use this software for any purpose,
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+ including commercial applications, and to alter it and redistribute it
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+ freely, subject to the following restrictions:
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+
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+ 1. The origin of this software must not be misrepresented; you must not
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+ claim that you wrote the original software. If you use this software
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+ in a product, an acknowledgment in the product documentation would be
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+ appreciated but is not required.
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+ 2. Altered source versions must be plainly marked as such, and must not be
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+ misrepresented as being the original software.
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+ 3. This notice may not be removed or altered from any source distribution.
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+*/
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+#include "../../SDL_internal.h"
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+
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+#ifdef SDL_JOYSTICK_HIDAPI
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+
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+#include "SDL_hints.h"
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+#include "SDL_events.h"
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+#include "SDL_joystick.h"
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+#include "SDL_gamecontroller.h"
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+#include "../SDL_sysjoystick.h"
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+#include "SDL_hidapijoystick_c.h"
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+#include "SDL_hidapi_rumble.h"
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+
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+
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+#ifdef SDL_JOYSTICK_HIDAPI_LUNA
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+
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+/* Define this if you want to log all packets from the controller */
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+/*#define DEBUG_LUNA_PROTOCOL*/
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+
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+enum
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+{
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+ SDL_CONTROLLER_BUTTON_LUNA_MIC = 15,
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+ SDL_CONTROLLER_NUM_LUNA_BUTTONS,
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+};
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+
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+typedef struct {
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+ Uint8 last_state[USB_PACKET_LENGTH];
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+} SDL_DriverLuna_Context;
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+
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+
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+static SDL_bool
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+HIDAPI_DriverLuna_IsSupportedDevice(const char *name, SDL_GameControllerType type, Uint16 vendor_id, Uint16 product_id, Uint16 version, int interface_number, int interface_class, int interface_subclass, int interface_protocol)
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+{
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+ if (vendor_id == BLUETOOTH_VENDOR_AMAZON && product_id == BLUETOOTH_PRODUCT_LUNA_CONTROLLER) {
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+ return SDL_TRUE;
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+ }
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+ return SDL_FALSE;
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+}
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+
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+static const char *
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+HIDAPI_DriverLuna_GetDeviceName(Uint16 vendor_id, Uint16 product_id)
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+{
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+ return "Amazon Luna Controller";
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+}
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+
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+static SDL_bool
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+HIDAPI_DriverLuna_InitDevice(SDL_HIDAPI_Device *device)
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+{
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+ return HIDAPI_JoystickConnected(device, NULL);
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+}
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+
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+static int
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+HIDAPI_DriverLuna_GetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id)
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+{
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+ return -1;
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+}
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+
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+static void
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+HIDAPI_DriverLuna_SetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id, int player_index)
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+{
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+}
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+
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+static SDL_bool
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+HIDAPI_DriverLuna_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
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+{
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+ SDL_DriverLuna_Context *ctx;
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+
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+ ctx = (SDL_DriverLuna_Context *)SDL_calloc(1, sizeof(*ctx));
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+ if (!ctx) {
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+ SDL_OutOfMemory();
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+ return SDL_FALSE;
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+ }
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+
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+ device->dev = hid_open_path(device->path, 0);
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+ if (!device->dev) {
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+ SDL_SetError("Couldn't open %s", device->path);
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+ SDL_free(ctx);
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+ return SDL_FALSE;
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+ }
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+ device->context = ctx;
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+
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+ /* Initialize the joystick capabilities */
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+ joystick->nbuttons = SDL_CONTROLLER_NUM_LUNA_BUTTONS;
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+ joystick->naxes = SDL_CONTROLLER_AXIS_MAX;
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+ joystick->epowerlevel = SDL_JOYSTICK_POWER_FULL;
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+ joystick->serial = NULL;
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+
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+ return SDL_TRUE;
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+}
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+
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+static int
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+HIDAPI_DriverLuna_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)
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+{
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+ /* Same packet as on Xbox One controllers connected via Bluetooth */
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+ Uint8 rumble_packet[] = { 0x03, 0x0F, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0xEB };
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+
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+ /* Magnitude is 1..100 so scale the 16-bit input here */
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+ rumble_packet[4] = low_frequency_rumble / 655;
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+ rumble_packet[5] = high_frequency_rumble / 655;
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+
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+ if (SDL_HIDAPI_SendRumble(device, rumble_packet, sizeof(rumble_packet)) != sizeof(rumble_packet)) {
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+ return SDL_SetError("Couldn't send rumble packet");
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+ }
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+
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+ return 0;
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+}
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+
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+static int
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+HIDAPI_DriverLuna_RumbleJoystickTriggers(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 left_rumble, Uint16 right_rumble)
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+{
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+ return SDL_Unsupported();
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+}
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+
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+static SDL_bool
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+HIDAPI_DriverLuna_HasJoystickLED(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
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+{
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+ return SDL_FALSE;
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+}
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+
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+static int
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+HIDAPI_DriverLuna_SetJoystickLED(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue)
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+{
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+ return SDL_Unsupported();
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+}
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+
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+static int
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+HIDAPI_DriverLuna_SetJoystickSensorsEnabled(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, SDL_bool enabled)
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+{
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+ return SDL_Unsupported();
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+}
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+
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+static void
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+HIDAPI_DriverLuna_HandleStatePacket(SDL_Joystick *joystick, SDL_DriverLuna_Context *ctx, Uint8 *data, int size)
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+{
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+ if (size >= 2 && data[0] == 0x02) {
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+ /* Home button has dedicated report */
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_GUIDE, (data[1] & 0x1) ? SDL_PRESSED : SDL_RELEASED);
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+ return;
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+ }
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+
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+ if (size >= 2 && data[0] == 0x04) {
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+ /* Battery level report */
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+ int level = data[1] * 100 / 0xFF;
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+ if (level == 0) {
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+ joystick->epowerlevel = SDL_JOYSTICK_POWER_EMPTY;
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+ }
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+ else if (level <= 20) {
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+ joystick->epowerlevel = SDL_JOYSTICK_POWER_LOW;
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+ }
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+ else if (level <= 70) {
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+ joystick->epowerlevel = SDL_JOYSTICK_POWER_MEDIUM;
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+ }
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+ else {
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+ joystick->epowerlevel = SDL_JOYSTICK_POWER_FULL;
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+ }
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+
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+ return;
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+ }
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+
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+ if (size < 17 || data[0] != 0x01) {
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+ /* We don't know how to handle this report */
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+ return;
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+ }
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+
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+ if (ctx->last_state[13] != data[13]) {
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+ SDL_bool dpad_up = SDL_FALSE;
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+ SDL_bool dpad_down = SDL_FALSE;
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+ SDL_bool dpad_left = SDL_FALSE;
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+ SDL_bool dpad_right = SDL_FALSE;
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+
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+ switch (data[13] & 0xf) {
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+ case 1:
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+ dpad_up = SDL_TRUE;
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+ break;
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+ case 2:
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+ dpad_up = SDL_TRUE;
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+ dpad_right = SDL_TRUE;
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+ break;
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+ case 3:
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+ dpad_right = SDL_TRUE;
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+ break;
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+ case 4:
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+ dpad_right = SDL_TRUE;
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+ dpad_down = SDL_TRUE;
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+ break;
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+ case 5:
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+ dpad_down = SDL_TRUE;
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+ break;
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+ case 6:
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+ dpad_left = SDL_TRUE;
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+ dpad_down = SDL_TRUE;
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+ break;
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+ case 7:
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+ dpad_left = SDL_TRUE;
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+ break;
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+ case 8:
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+ dpad_up = SDL_TRUE;
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+ dpad_left = SDL_TRUE;
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+ break;
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+ default:
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+ break;
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+ }
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_DOWN, dpad_down);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_UP, dpad_up);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_RIGHT, dpad_right);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_LEFT, dpad_left);
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+ }
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+
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+ if (ctx->last_state[14] != data[14]) {
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_A, (data[14] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_B, (data[14] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_X, (data[14] & 0x08) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_Y, (data[14] & 0x10) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSHOULDER, (data[14] & 0x40) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, (data[14] & 0x80) ? SDL_PRESSED : SDL_RELEASED);
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+ }
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+ if (ctx->last_state[15] != data[15]) {
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LUNA_MIC, (data[15] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_START, (data[15] & 0x08) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSTICK, (data[15] & 0x20) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSTICK, (data[15] & 0x40) ? SDL_PRESSED : SDL_RELEASED);
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+ }
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+ if (ctx->last_state[16] != data[16]) {
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_BACK, (data[16] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
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+ }
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+
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+#define READ_STICK_AXIS(offset) \
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+ (data[offset] == 0x7f ? 0 : \
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+ (Sint16)HIDAPI_RemapVal((float)((int)(data[offset] - 0x7e)), 0x01 - 0x7f, 0xff - 0x7f, SDL_MIN_SINT16, SDL_MAX_SINT16))
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+ {
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+ Sint16 axis = READ_STICK_AXIS(2);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTX, axis);
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+ axis = READ_STICK_AXIS(4);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTY, axis);
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+ axis = READ_STICK_AXIS(6);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTX, axis);
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+ axis = READ_STICK_AXIS(8);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTY, axis);
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+ }
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+#undef READ_STICK_AXIS
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+
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+#define READ_TRIGGER_AXIS(offset) \
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+ (Sint16)HIDAPI_RemapVal((float)((int)(((data[offset] | (data[offset + 1] << 8)) & 0x3ff) - 0x200)), 0x00 - 0x200, 0x3ff - 0x200, SDL_MIN_SINT16, SDL_MAX_SINT16)
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+ {
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+ Sint16 axis = READ_TRIGGER_AXIS(9);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERLEFT, axis);
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+ axis = READ_TRIGGER_AXIS(11);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, axis);
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+ }
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+#undef READ_TRIGGER_AXIS
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+
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+ SDL_memcpy(ctx->last_state, data, SDL_min(size, sizeof(ctx->last_state)));
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+}
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+
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+static SDL_bool
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+HIDAPI_DriverLuna_UpdateDevice(SDL_HIDAPI_Device *device)
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+{
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+ SDL_DriverLuna_Context *ctx = (SDL_DriverLuna_Context *)device->context;
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+ SDL_Joystick *joystick = NULL;
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+ Uint8 data[USB_PACKET_LENGTH];
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+ int size = 0;
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+
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+ if (device->num_joysticks > 0) {
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+ joystick = SDL_JoystickFromInstanceID(device->joysticks[0]);
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+ }
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+ if (!joystick) {
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+ return SDL_FALSE;
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+ }
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+
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+ while ((size = hid_read_timeout(device->dev, data, sizeof(data), 0)) > 0) {
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+#ifdef DEBUG_LUNA_PROTOCOL
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+ HIDAPI_DumpPacket("Amazon Luna packet: size = %d", data, size);
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+#endif
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+ HIDAPI_DriverLuna_HandleStatePacket(joystick, ctx, data, size);
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+ }
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+
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+ if (size < 0) {
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+ /* Read error, device is disconnected */
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+ HIDAPI_JoystickDisconnected(device, joystick->instance_id);
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+ }
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+ return (size >= 0);
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+}
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+
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+static void
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+HIDAPI_DriverLuna_CloseJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
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+{
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+ SDL_LockMutex(device->dev_lock);
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+ {
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+ if (device->dev) {
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+ hid_close(device->dev);
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+ device->dev = NULL;
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+ }
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+
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+ SDL_free(device->context);
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+ device->context = NULL;
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+ }
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+ SDL_UnlockMutex(device->dev_lock);
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+}
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+
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+static void
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+HIDAPI_DriverLuna_FreeDevice(SDL_HIDAPI_Device *device)
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+{
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+}
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+
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+SDL_HIDAPI_DeviceDriver SDL_HIDAPI_DriverLuna =
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+{
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+ SDL_HINT_JOYSTICK_HIDAPI_LUNA,
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+ SDL_TRUE,
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+ HIDAPI_DriverLuna_IsSupportedDevice,
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+ HIDAPI_DriverLuna_GetDeviceName,
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+ HIDAPI_DriverLuna_InitDevice,
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+ HIDAPI_DriverLuna_GetDevicePlayerIndex,
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+ HIDAPI_DriverLuna_SetDevicePlayerIndex,
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+ HIDAPI_DriverLuna_UpdateDevice,
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+ HIDAPI_DriverLuna_OpenJoystick,
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+ HIDAPI_DriverLuna_RumbleJoystick,
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+ HIDAPI_DriverLuna_RumbleJoystickTriggers,
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+ HIDAPI_DriverLuna_HasJoystickLED,
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+ HIDAPI_DriverLuna_SetJoystickLED,
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+ HIDAPI_DriverLuna_SetJoystickSensorsEnabled,
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+ HIDAPI_DriverLuna_CloseJoystick,
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+ HIDAPI_DriverLuna_FreeDevice,
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+};
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+
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+#endif /* SDL_JOYSTICK_HIDAPI_LUNA */
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+
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+#endif /* SDL_JOYSTICK_HIDAPI */
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+
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+/* vi: set ts=4 sw=4 expandtab: */
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Dimitriy Ryazantcev