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@@ -0,0 +1,443 @@
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+/*
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+ Simple DirectMedia Layer
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+ Copyright (C) 1997-2022 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_timer.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_SHIELD
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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_SHIELD_PROTOCOL*/
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+
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+#define CMD_BATTERY_STATE 0x07
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+#define CMD_RUMBLE 0x39
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+#define CMD_CHARGE_STATE 0x3A
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+
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+/* Milliseconds between polls of battery state */
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+#define BATTERY_POLL_INTERVAL_MS 60000
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+
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+/* Milliseconds between retransmission of rumble to keep motors running */
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+#define RUMBLE_REFRESH_INTERVAL_MS 500
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+
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+/* Reports that are too small are dropped over Bluetooth */
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+#define HID_REPORT_SIZE 33
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+
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+enum
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+{
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+ SDL_CONTROLLER_BUTTON_SHIELD_HOME = 15,
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+ SDL_CONTROLLER_NUM_SHIELD_BUTTONS,
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+};
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+
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+typedef struct {
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+ Uint8 seq_num;
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+
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+ SDL_JoystickPowerLevel battery_level;
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+ SDL_bool charging;
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+ Uint32 last_battery_query_time;
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+
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+ SDL_bool rumble_report_pending;
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+ SDL_bool rumble_update_pending;
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+ Uint8 left_motor_amplitude;
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+ Uint8 right_motor_amplitude;
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+ Uint32 last_rumble_time;
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+
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+ Uint8 last_state[USB_PACKET_LENGTH];
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+} SDL_DriverShield_Context;
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+
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+
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+static SDL_bool
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+HIDAPI_DriverShield_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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+ return (type == SDL_CONTROLLER_TYPE_NVIDIA_SHIELD) ? SDL_TRUE : SDL_FALSE;
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+}
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+
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+static const char *
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+HIDAPI_DriverShield_GetDeviceName(const char *name, Uint16 vendor_id, Uint16 product_id)
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+{
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+ return "NVIDIA SHIELD Controller";
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+}
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+
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+static SDL_bool
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+HIDAPI_DriverShield_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_DriverShield_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_DriverShield_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 int
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+HIDAPI_DriverShield_SendCommand(SDL_HIDAPI_Device *device, Uint8 cmd, Uint8* data, int size)
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+{
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+ SDL_DriverShield_Context *ctx = device->context;
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+ Uint8 cmd_pkt[HID_REPORT_SIZE];
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+
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+ if (size >= sizeof(cmd_pkt) - 3) {
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+ return SDL_SetError("Invalid command data");
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+ }
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+
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+ if (SDL_HIDAPI_LockRumble() < 0) {
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+ return -1;
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+ }
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+
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+ cmd_pkt[0] = 0x04;
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+ cmd_pkt[1] = cmd;
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+ cmd_pkt[2] = ctx->seq_num++;
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+ if (data) {
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+ SDL_memcpy(&cmd_pkt[3], data, size);
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+ }
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+
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+ if (SDL_HIDAPI_SendRumbleAndUnlock(device, cmd_pkt, sizeof(cmd_pkt)) != sizeof(cmd_pkt)) {
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+ return SDL_SetError("Couldn't send command 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 SDL_bool
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+HIDAPI_DriverShield_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
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+{
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+ SDL_DriverShield_Context *ctx;
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+
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+ ctx = (SDL_DriverShield_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 = SDL_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_SHIELD_BUTTONS;
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+ joystick->naxes = SDL_CONTROLLER_AXIS_MAX;
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+ joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
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+
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+ /* Request battery and charging info */
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+ ctx->last_battery_query_time = SDL_GetTicks();
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+ HIDAPI_DriverShield_SendCommand(device, CMD_CHARGE_STATE, NULL, 0);
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+ HIDAPI_DriverShield_SendCommand(device, CMD_BATTERY_STATE, NULL, 0);
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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_DriverShield_SendNextRumble(SDL_HIDAPI_Device *device)
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+{
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+ SDL_DriverShield_Context *ctx = device->context;
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+ Uint8 rumble_data[3];
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+
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+ if (!ctx->rumble_update_pending) {
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+ return 0;
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+ }
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+
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+ rumble_data[0] = 0x01; /* enable */
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+ rumble_data[1] = ctx->left_motor_amplitude;
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+ rumble_data[2] = ctx->right_motor_amplitude;
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+
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+ ctx->rumble_update_pending = SDL_FALSE;
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+ ctx->last_rumble_time = SDL_GetTicks();
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+
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+ return HIDAPI_DriverShield_SendCommand(device, CMD_RUMBLE, rumble_data, sizeof(rumble_data));
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+}
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+
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+static int
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+HIDAPI_DriverShield_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)
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+{
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+ SDL_DriverShield_Context *ctx = device->context;
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+
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+ /* The rumble motors are quite intense, so tone down the intensity like the official driver does */
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+ ctx->left_motor_amplitude = low_frequency_rumble >> 11;
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+ ctx->right_motor_amplitude = high_frequency_rumble >> 11;
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+ ctx->rumble_update_pending = SDL_TRUE;
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+
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+ if (ctx->rumble_report_pending) {
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+ /* We will service this after the hardware acknowledges the previous request */
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+ return 0;
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+ }
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+
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+ return HIDAPI_DriverShield_SendNextRumble(device);
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+}
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+
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+static int
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+HIDAPI_DriverShield_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 Uint32
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+HIDAPI_DriverShield_GetJoystickCapabilities(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
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+{
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+ return SDL_JOYCAP_RUMBLE;
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+}
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+
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+static int
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+HIDAPI_DriverShield_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_DriverShield_SendJoystickEffect(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, const void *data, int size)
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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_DriverShield_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_DriverShield_HandleStatePacket(SDL_Joystick *joystick, SDL_DriverShield_Context *ctx, Uint8 *data, int size)
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+{
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+ if (size < 23) {
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+ return;
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+ }
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+
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+ if (ctx->last_state[2] != data[2]) {
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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[2]) {
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+ case 0:
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+ dpad_up = SDL_TRUE;
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+ break;
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+ case 1:
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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 2:
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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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+ dpad_down = SDL_TRUE;
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+ break;
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+ case 4:
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+ dpad_down = SDL_TRUE;
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+ break;
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+ case 5:
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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 6:
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+ dpad_left = SDL_TRUE;
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+ break;
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+ case 7:
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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[3] != data[3]) {
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_A, (data[3] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_B, (data[3] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_X, (data[3] & 0x04) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_Y, (data[3] & 0x08) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSHOULDER, (data[3] & 0x10) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, (data[3] & 0x20) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSTICK, (data[3] & 0x40) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSTICK, (data[3] & 0x80) ? SDL_PRESSED : SDL_RELEASED);
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+ }
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+
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+ if (ctx->last_state[4] != data[4]) {
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_START, (data[4] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
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+ }
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+
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTX, SDL_SwapLE16(*(Sint16*)&data[9]) - 0x8000);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTY, SDL_SwapLE16(*(Sint16*)&data[11]) - 0x8000);
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+
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTX, SDL_SwapLE16(*(Sint16*)&data[13]) - 0x8000);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTY, SDL_SwapLE16(*(Sint16*)&data[15]) - 0x8000);
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+
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERLEFT, SDL_SwapLE16(*(Sint16*)&data[19]) - 0x8000);
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+ SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, SDL_SwapLE16(*(Sint16*)&data[21]) - 0x8000);
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+
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+ if (ctx->last_state[17] != data[17]) {
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_SHIELD_HOME, (data[17] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
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+ SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_BACK, (data[17] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
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+ }
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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_DriverShield_UpdateDevice(SDL_HIDAPI_Device *device)
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+{
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+ SDL_DriverShield_Context *ctx = (SDL_DriverShield_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 = SDL_hid_read_timeout(device->dev, data, sizeof(data), 0)) > 0) {
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+#ifdef DEBUG_SHIELD_PROTOCOL
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+ HIDAPI_DumpPacket("NVIDIA SHIELD packet: size = %d", data, size);
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+#endif
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+ switch (data[0]) {
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+ case 0x01:
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+ HIDAPI_DriverShield_HandleStatePacket(joystick, ctx, data, size);
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+ break;
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+ case 0x03:
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+ switch (data[1]) {
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+ case CMD_RUMBLE:
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+ ctx->rumble_report_pending = SDL_FALSE;
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+ HIDAPI_DriverShield_SendNextRumble(device);
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+ break;
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+ case CMD_CHARGE_STATE:
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+ ctx->charging = data[2] != 0;
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+ SDL_PrivateJoystickBatteryLevel(joystick, ctx->charging ? SDL_JOYSTICK_POWER_WIRED : ctx->battery_level);
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+ break;
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+ case CMD_BATTERY_STATE:
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+ switch (data[5]) {
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+ case 0:
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+ ctx->battery_level = SDL_JOYSTICK_POWER_EMPTY;
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+ break;
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+ case 1:
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+ ctx->battery_level = SDL_JOYSTICK_POWER_LOW;
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+ break;
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+ case 2: /* 40% */
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+ case 3: /* 60% */
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+ case 4: /* 80% */
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+ ctx->battery_level = SDL_JOYSTICK_POWER_MEDIUM;
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+ break;
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+ case 5:
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+ ctx->battery_level = SDL_JOYSTICK_POWER_FULL;
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+ break;
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+ default:
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+ ctx->battery_level = SDL_JOYSTICK_POWER_UNKNOWN;
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+ break;
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+ }
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+ SDL_PrivateJoystickBatteryLevel(joystick, ctx->charging ? SDL_JOYSTICK_POWER_WIRED : ctx->battery_level);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Ask for battery state again if we're due for an update */
|
|
|
+ if (SDL_TICKS_PASSED(SDL_GetTicks(), ctx->last_battery_query_time + BATTERY_POLL_INTERVAL_MS)) {
|
|
|
+ ctx->last_battery_query_time = SDL_GetTicks();
|
|
|
+ HIDAPI_DriverShield_SendCommand(device, CMD_BATTERY_STATE, NULL, 0);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Retransmit rumble packets if they've lasted longer than the hardware supports */
|
|
|
+ if ((ctx->left_motor_amplitude != 0 || ctx->right_motor_amplitude != 0) &&
|
|
|
+ SDL_TICKS_PASSED(SDL_GetTicks(), ctx->last_rumble_time + RUMBLE_REFRESH_INTERVAL_MS)) {
|
|
|
+ ctx->rumble_update_pending = SDL_TRUE;
|
|
|
+ HIDAPI_DriverShield_SendNextRumble(device);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (size < 0) {
|
|
|
+ /* Read error, device is disconnected */
|
|
|
+ HIDAPI_JoystickDisconnected(device, joystick->instance_id);
|
|
|
+ }
|
|
|
+ return (size >= 0);
|
|
|
+}
|
|
|
+
|
|
|
+static void
|
|
|
+HIDAPI_DriverShield_CloseJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
|
|
|
+{
|
|
|
+ SDL_LockMutex(device->dev_lock);
|
|
|
+ {
|
|
|
+ if (device->dev) {
|
|
|
+ SDL_hid_close(device->dev);
|
|
|
+ device->dev = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ SDL_free(device->context);
|
|
|
+ device->context = NULL;
|
|
|
+ }
|
|
|
+ SDL_UnlockMutex(device->dev_lock);
|
|
|
+}
|
|
|
+
|
|
|
+static void
|
|
|
+HIDAPI_DriverShield_FreeDevice(SDL_HIDAPI_Device *device)
|
|
|
+{
|
|
|
+}
|
|
|
+
|
|
|
+SDL_HIDAPI_DeviceDriver SDL_HIDAPI_DriverShield =
|
|
|
+{
|
|
|
+ SDL_HINT_JOYSTICK_HIDAPI_SHIELD,
|
|
|
+ SDL_TRUE,
|
|
|
+ SDL_TRUE,
|
|
|
+ HIDAPI_DriverShield_IsSupportedDevice,
|
|
|
+ HIDAPI_DriverShield_GetDeviceName,
|
|
|
+ HIDAPI_DriverShield_InitDevice,
|
|
|
+ HIDAPI_DriverShield_GetDevicePlayerIndex,
|
|
|
+ HIDAPI_DriverShield_SetDevicePlayerIndex,
|
|
|
+ HIDAPI_DriverShield_UpdateDevice,
|
|
|
+ HIDAPI_DriverShield_OpenJoystick,
|
|
|
+ HIDAPI_DriverShield_RumbleJoystick,
|
|
|
+ HIDAPI_DriverShield_RumbleJoystickTriggers,
|
|
|
+ HIDAPI_DriverShield_GetJoystickCapabilities,
|
|
|
+ HIDAPI_DriverShield_SetJoystickLED,
|
|
|
+ HIDAPI_DriverShield_SendJoystickEffect,
|
|
|
+ HIDAPI_DriverShield_SetJoystickSensorsEnabled,
|
|
|
+ HIDAPI_DriverShield_CloseJoystick,
|
|
|
+ HIDAPI_DriverShield_FreeDevice,
|
|
|
+};
|
|
|
+
|
|
|
+#endif /* SDL_JOYSTICK_HIDAPI_SHIELD */
|
|
|
+
|
|
|
+#endif /* SDL_JOYSTICK_HIDAPI */
|
|
|
+
|
|
|
+/* vi: set ts=4 sw=4 expandtab: */
|
Cameron Gutman