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1b83407ce9
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convert PRUnichar char16_t
693 lines
20 KiB
C++
693 lines
20 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <algorithm>
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#include <cstddef>
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#include <stdio.h>
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#ifndef UNICODE
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#define UNICODE
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#endif
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#include <windows.h>
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#define DIRECTINPUT_VERSION 0x0800
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#include <dinput.h>
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#include "nsIComponentManager.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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#include "nsITimer.h"
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#include "nsTArray.h"
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#include "nsThreadUtils.h"
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#include "mozilla/dom/GamepadService.h"
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#include "mozilla/Services.h"
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namespace {
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using mozilla::dom::GamepadService;
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const LONG kMaxAxisValue = 65535;
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const DWORD BUTTON_DOWN_MASK = 0x80;
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// Multiple devices-changed notifications can be sent when a device
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// is connected, because USB devices consist of multiple logical devices.
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// Therefore, we wait a bit after receiving one before looking for
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// device changes.
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const uint32_t kDevicesChangedStableDelay = 200;
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typedef struct {
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float x,y;
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} HatState;
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struct Gamepad {
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// From DirectInput, unique to this device+computer combination.
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GUID guidInstance;
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// The ID assigned by the base GamepadService
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int id;
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// A somewhat unique string consisting of the USB vendor/product IDs,
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// and the controller name.
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char idstring[128];
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// USB vendor and product IDs
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int vendorID;
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int productID;
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// Information about the physical device.
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int numAxes;
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int numHats;
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int numButtons;
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// The human-readable device name.
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char name[128];
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// The DirectInput device.
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nsRefPtr<IDirectInputDevice8> device;
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// A handle that DirectInput signals when there is new data from
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// the device.
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HANDLE event;
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// The state of any POV hats on the device.
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HatState hatState[4];
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// Used during rescan to find devices that were disconnected.
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bool present;
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};
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// Given DWORD |hatPos| representing the position of the POV hat per:
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// http://msdn.microsoft.com/en-us/library/ee418260%28v=VS.85%29.aspx
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// fill |axes| with the position of the x and y axes.
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//
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//XXX: ostensibly the values could be arbitrary degrees for a hat with
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// full rotation, but we'll punt on that for now. This should handle
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// 8-way D-pads exposed as POV hats.
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static void
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HatPosToAxes(DWORD hatPos, HatState& axes) {
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// hatPos is in hundredths of a degree clockwise from north.
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if (LOWORD(hatPos) == 0xFFFF) {
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// centered
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axes.x = axes.y = 0.0;
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}
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else if (hatPos == 0) {
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// Up
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axes.x = 0.0;
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axes.y = -1.0;
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}
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else if (hatPos == 45 * DI_DEGREES) {
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// Up-right
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axes.x = 1.0;
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axes.y = -1.0;
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}
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else if (hatPos == 90 * DI_DEGREES) {
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// Right
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axes.x = 1.0;
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axes.y = 0.0;
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}
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else if (hatPos == 135 * DI_DEGREES) {
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// Down-right
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axes.x = 1.0;
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axes.y = 1.0;
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}
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else if (hatPos == 180 * DI_DEGREES) {
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// Down
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axes.x = 0.0;
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axes.y = 1.0;
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}
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else if (hatPos == 225 * DI_DEGREES) {
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// Down-left
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axes.x = -1.0;
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axes.y = 1.0;
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}
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else if (hatPos == 270 * DI_DEGREES) {
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// Left
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axes.x = -1.0;
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axes.y = 0.0;
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}
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else if (hatPos == 315 * DI_DEGREES) {
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// Up-left
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axes.x = -1.0;
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axes.y = -1.0;
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}
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}
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// Used to post events from the background thread to the foreground thread.
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class GamepadEvent : public nsRunnable {
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public:
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typedef enum {
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Axis,
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Button,
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HatX,
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HatY,
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HatXY,
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Unknown
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} Type;
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GamepadEvent(const Gamepad& gamepad,
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Type type,
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int which,
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DWORD data) : mGamepad(gamepad),
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mType(type),
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mWhich(which),
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mData(data) {
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}
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NS_IMETHOD Run() {
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nsRefPtr<GamepadService> gamepadsvc(GamepadService::GetService());
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switch (mType) {
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case Button:
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gamepadsvc->NewButtonEvent(mGamepad.id, mWhich, mData & BUTTON_DOWN_MASK);
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break;
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case Axis: {
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float adjustedData = ((float)mData * 2.0f) / (float)kMaxAxisValue - 1.0f;
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gamepadsvc->NewAxisMoveEvent(mGamepad.id, mWhich, adjustedData);
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}
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case HatX:
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case HatY:
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case HatXY: {
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// Synthesize 2 axes per POV hat for convenience.
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HatState hatState;
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HatPosToAxes(mData, hatState);
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int xAxis = mGamepad.numAxes + 2 * mWhich;
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int yAxis = mGamepad.numAxes + 2 * mWhich + 1;
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//TODO: ostensibly we could not fire an event if one axis hasn't
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// changed, but it's a pain to track that.
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if (mType == HatX || mType == HatXY) {
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gamepadsvc->NewAxisMoveEvent(mGamepad.id, xAxis, hatState.x);
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}
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if (mType == HatY || mType == HatXY) {
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gamepadsvc->NewAxisMoveEvent(mGamepad.id, yAxis, hatState.y);
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}
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break;
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}
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case Unknown:
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break;
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}
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return NS_OK;
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}
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const Gamepad& mGamepad;
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// Type of event
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Type mType;
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// Which button/axis is involved
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int mWhich;
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// Data specific to event
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DWORD mData;
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};
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class GamepadChangeEvent : public nsRunnable {
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public:
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enum Type {
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Added,
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Removed
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};
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GamepadChangeEvent(Gamepad& gamepad,
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Type type) : mGamepad(gamepad),
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mID(gamepad.id),
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mType(type) {
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}
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NS_IMETHOD Run() {
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nsRefPtr<GamepadService> gamepadsvc(GamepadService::GetService());
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if (mType == Added) {
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mGamepad.id = gamepadsvc->AddGamepad(mGamepad.idstring,
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mozilla::dom::NoMapping,
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mGamepad.numButtons,
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mGamepad.numAxes +
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mGamepad.numHats*2);
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} else {
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gamepadsvc->RemoveGamepad(mID);
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}
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return NS_OK;
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}
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private:
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Gamepad& mGamepad;
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uint32_t mID;
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Type mType;
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};
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class WindowsGamepadService;
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class Observer : public nsIObserver {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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Observer(WindowsGamepadService& svc) : mSvc(svc),
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mObserving(true) {
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nsresult rv;
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mTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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observerService->AddObserver(this,
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NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID,
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false);
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}
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void Stop() {
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if (mTimer) {
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mTimer->Cancel();
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}
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if (mObserving) {
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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observerService->RemoveObserver(this, NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID);
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mObserving = false;
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}
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}
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virtual ~Observer() {
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Stop();
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}
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void SetDeviceChangeTimer() {
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// set stable timer, since we will get multiple devices-changed
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// notifications at once
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if (mTimer) {
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mTimer->Cancel();
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mTimer->Init(this, kDevicesChangedStableDelay, nsITimer::TYPE_ONE_SHOT);
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}
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}
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private:
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// Gamepad service owns us, we just hold a reference back to it.
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WindowsGamepadService& mSvc;
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nsCOMPtr<nsITimer> mTimer;
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bool mObserving;
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};
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NS_IMPL_ISUPPORTS1(Observer, nsIObserver);
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class WindowsGamepadService {
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public:
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WindowsGamepadService();
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virtual ~WindowsGamepadService() {
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Cleanup();
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CloseHandle(mThreadExitEvent);
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CloseHandle(mThreadRescanEvent);
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if (dinput) {
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dinput->Release();
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dinput = nullptr;
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}
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}
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enum DeviceChangeType {
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DeviceChangeNotification,
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DeviceChangeStable
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};
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void DevicesChanged(DeviceChangeType type);
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void Startup();
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void Shutdown();
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private:
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void ScanForDevices();
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void Cleanup();
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void CleanupGamepad(Gamepad& gamepad);
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// Callback for enumerating axes on a device
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static BOOL CALLBACK EnumObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi,
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LPVOID pvRef);
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// Callback for enumerating devices via DInput
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static BOOL CALLBACK EnumCallback(LPCDIDEVICEINSTANCE lpddi, LPVOID pvRef);
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// Thread function to wait on device events
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static DWORD WINAPI DInputThread(LPVOID arg);
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// Used to signal the background thread to exit.
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HANDLE mThreadExitEvent;
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// Used to signal the background thread to rescan devices.
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HANDLE mThreadRescanEvent;
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HANDLE mThread;
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// List of connected devices.
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nsTArray<Gamepad> mGamepads;
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// List of event handles used for signaling.
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nsTArray<HANDLE> mEvents;
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LPDIRECTINPUT8 dinput;
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nsRefPtr<Observer> mObserver;
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};
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WindowsGamepadService::WindowsGamepadService()
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: mThreadExitEvent(CreateEventW(nullptr, FALSE, FALSE, nullptr)),
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mThreadRescanEvent(CreateEventW(nullptr, FALSE, FALSE, nullptr)),
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mThread(nullptr),
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dinput(nullptr) {
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mObserver = new Observer(*this);
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// Initialize DirectInput
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CoInitialize(nullptr);
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if (CoCreateInstance(CLSID_DirectInput8,
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nullptr,
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CLSCTX_INPROC_SERVER,
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IID_IDirectInput8W,
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(LPVOID*)&dinput) == S_OK) {
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if (dinput->Initialize(GetModuleHandle(nullptr),
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DIRECTINPUT_VERSION) != DI_OK) {
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dinput->Release();
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dinput = nullptr;
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}
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}
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}
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// static
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BOOL CALLBACK
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WindowsGamepadService::EnumObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi,
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LPVOID pvRef) {
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// Ensure that all axes are using the same range.
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Gamepad* gamepad = reinterpret_cast<Gamepad*>(pvRef);
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DIPROPRANGE dp;
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dp.diph.dwHeaderSize = sizeof(DIPROPHEADER);
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dp.diph.dwSize = sizeof(DIPROPRANGE);
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dp.diph.dwHow = DIPH_BYID;
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dp.diph.dwObj = lpddoi->dwType;
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dp.lMin = 0;
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dp.lMax = kMaxAxisValue;
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gamepad->device->SetProperty(DIPROP_RANGE, &dp.diph);
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return DIENUM_CONTINUE;
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}
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// static
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BOOL CALLBACK
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WindowsGamepadService::EnumCallback(LPCDIDEVICEINSTANCE lpddi,
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LPVOID pvRef) {
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WindowsGamepadService* self =
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reinterpret_cast<WindowsGamepadService*>(pvRef);
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// See if this device is already present in our list.
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for (unsigned int i = 0; i < self->mGamepads.Length(); i++) {
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if (memcmp(&lpddi->guidInstance, &self->mGamepads[i].guidInstance,
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sizeof(GUID)) == 0) {
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self->mGamepads[i].present = true;
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return DIENUM_CONTINUE;
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}
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}
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Gamepad gamepad;
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memset(&gamepad, 0, sizeof(Gamepad));
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if (self->dinput->CreateDevice(lpddi->guidInstance,
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getter_AddRefs(gamepad.device),
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nullptr)
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== DI_OK) {
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gamepad.present = true;
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memcpy(&gamepad.guidInstance, &lpddi->guidInstance, sizeof(GUID));
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DIDEVICEINSTANCE info;
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info.dwSize = sizeof(DIDEVICEINSTANCE);
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if (gamepad.device->GetDeviceInfo(&info) == DI_OK) {
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WideCharToMultiByte(CP_UTF8, 0, info.tszProductName, -1,
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gamepad.name, sizeof(gamepad.name), nullptr, nullptr);
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}
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// Get vendor id and product id
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DIPROPDWORD dp;
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dp.diph.dwSize = sizeof(DIPROPDWORD);
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dp.diph.dwHeaderSize = sizeof(DIPROPHEADER);
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dp.diph.dwObj = 0;
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dp.diph.dwHow = DIPH_DEVICE;
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if (gamepad.device->GetProperty(DIPROP_VIDPID, &dp.diph) == DI_OK) {
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sprintf(gamepad.idstring, "%x-%x-%s",
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LOWORD(dp.dwData), HIWORD(dp.dwData), gamepad.name);
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}
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DIDEVCAPS caps;
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caps.dwSize = sizeof(DIDEVCAPS);
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if (gamepad.device->GetCapabilities(&caps) == DI_OK) {
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gamepad.numAxes = caps.dwAxes;
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gamepad.numHats = caps.dwPOVs;
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gamepad.numButtons = caps.dwButtons;
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//XXX: handle polled devices?
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// (caps.dwFlags & DIDC_POLLEDDATAFORMAT || caps.dwFlags & DIDC_POLLEDDEVICE)
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}
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// Set min/max range for all axes on the device.
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gamepad.device->EnumObjects(EnumObjectsCallback, &gamepad, DIDFT_AXIS);
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// Set up structure for setting buffer size for buffered data
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dp.diph.dwHeaderSize = sizeof(DIPROPHEADER);
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dp.diph.dwSize = sizeof(DIPROPDWORD);
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dp.diph.dwObj = 0;
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dp.diph.dwHow = DIPH_DEVICE;
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dp.dwData = 64; // arbitrary
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// Create event so DInput can signal us when there's new data.
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gamepad.event = CreateEventW(nullptr, FALSE, FALSE, nullptr);
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// Set data format, event notification, and acquire device
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if (gamepad.device->SetDataFormat(&c_dfDIJoystick) == DI_OK &&
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gamepad.device->SetProperty(DIPROP_BUFFERSIZE, &dp.diph) == DI_OK &&
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gamepad.device->SetEventNotification(gamepad.event) == DI_OK &&
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gamepad.device->Acquire() == DI_OK) {
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self->mGamepads.AppendElement(gamepad);
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// Inform the GamepadService
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nsRefPtr<GamepadChangeEvent> event =
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new GamepadChangeEvent(self->mGamepads[self->mGamepads.Length() - 1],
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GamepadChangeEvent::Added);
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NS_DispatchToMainThread(event, NS_DISPATCH_NORMAL);
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}
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else {
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if (gamepad.device) {
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gamepad.device->SetEventNotification(nullptr);
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}
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CloseHandle(gamepad.event);
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}
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}
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return DIENUM_CONTINUE;
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}
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void
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WindowsGamepadService::ScanForDevices() {
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for (unsigned int i = 0; i < mGamepads.Length(); i++) {
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mGamepads[i].present = false;
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}
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dinput->EnumDevices(DI8DEVCLASS_GAMECTRL,
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(LPDIENUMDEVICESCALLBACK)EnumCallback,
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this,
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DIEDFL_ATTACHEDONLY);
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// Look for devices that were removed.
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for (int i = mGamepads.Length() - 1; i >= 0; i--) {
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if (!mGamepads[i].present) {
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nsRefPtr<GamepadChangeEvent> event =
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new GamepadChangeEvent(mGamepads[i],
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GamepadChangeEvent::Removed);
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NS_DispatchToMainThread(event, NS_DISPATCH_NORMAL);
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CleanupGamepad(mGamepads[i]);
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mGamepads.RemoveElementAt(i);
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}
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}
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mEvents.Clear();
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for (unsigned int i = 0; i < mGamepads.Length(); i++) {
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mEvents.AppendElement(mGamepads[i].event);
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}
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// These events must be the last elements in the array, so that
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// the other elements match mGamepads in order.
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mEvents.AppendElement(mThreadRescanEvent);
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mEvents.AppendElement(mThreadExitEvent);
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}
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// static
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DWORD WINAPI
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WindowsGamepadService::DInputThread(LPVOID arg) {
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WindowsGamepadService* self = reinterpret_cast<WindowsGamepadService*>(arg);
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self->ScanForDevices();
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while (true) {
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DWORD result = WaitForMultipleObjects(self->mEvents.Length(),
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self->mEvents.Elements(),
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FALSE,
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INFINITE);
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if (result == WAIT_FAILED ||
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result == WAIT_OBJECT_0 + self->mEvents.Length() - 1) {
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// error, or the main thread signaled us to exit
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break;
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}
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unsigned int i = result - WAIT_OBJECT_0;
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|
|
if (i == self->mEvents.Length() - 2) {
|
|
// Main thread is signaling for a device rescan.
|
|
self->ScanForDevices();
|
|
continue;
|
|
}
|
|
|
|
if (i >= self->mGamepads.Length()) {
|
|
// Something would be terribly wrong here, possibly we got
|
|
// a WAIT_ABANDONED_x result.
|
|
continue;
|
|
}
|
|
|
|
// first query for the number of items in the buffer
|
|
DWORD items = INFINITE;
|
|
nsRefPtr<IDirectInputDevice8> device = self->mGamepads[i].device;
|
|
if (device->GetDeviceData(sizeof(DIDEVICEOBJECTDATA),
|
|
nullptr,
|
|
&items,
|
|
DIGDD_PEEK)== DI_OK) {
|
|
while (items > 0) {
|
|
// now read each buffered event
|
|
//TODO: read more than one event at a time
|
|
DIDEVICEOBJECTDATA data;
|
|
DWORD readCount = sizeof(data) / sizeof(DIDEVICEOBJECTDATA);
|
|
if (device->GetDeviceData(sizeof(DIDEVICEOBJECTDATA),
|
|
&data, &readCount, 0) == DI_OK) {
|
|
//TODO: data.dwTimeStamp
|
|
GamepadEvent::Type type = GamepadEvent::Unknown;
|
|
int which;
|
|
if (data.dwOfs >= DIJOFS_BUTTON0 && data.dwOfs < DIJOFS_BUTTON(32)) {
|
|
type = GamepadEvent::Button;
|
|
which = data.dwOfs - DIJOFS_BUTTON0;
|
|
}
|
|
else if(data.dwOfs >= DIJOFS_X && data.dwOfs < DIJOFS_SLIDER(2)) {
|
|
// axis/slider
|
|
type = GamepadEvent::Axis;
|
|
which = (data.dwOfs - DIJOFS_X) / sizeof(LONG);
|
|
}
|
|
else if (data.dwOfs >= DIJOFS_POV(0) && data.dwOfs < DIJOFS_POV(4)) {
|
|
HatState hatState;
|
|
HatPosToAxes(data.dwData, hatState);
|
|
which = (data.dwOfs - DIJOFS_POV(0)) / sizeof(DWORD);
|
|
// Only send out axis move events for the axes that moved
|
|
// in this hat move.
|
|
if (hatState.x != self->mGamepads[i].hatState[which].x) {
|
|
type = GamepadEvent::HatX;
|
|
}
|
|
if (hatState.y != self->mGamepads[i].hatState[which].y) {
|
|
if (type == GamepadEvent::HatX) {
|
|
type = GamepadEvent::HatXY;
|
|
}
|
|
else {
|
|
type = GamepadEvent::HatY;
|
|
}
|
|
}
|
|
self->mGamepads[i].hatState[which].x = hatState.x;
|
|
self->mGamepads[i].hatState[which].y = hatState.y;
|
|
}
|
|
|
|
if (type != GamepadEvent::Unknown) {
|
|
nsRefPtr<GamepadEvent> event =
|
|
new GamepadEvent(self->mGamepads[i], type, which, data.dwData);
|
|
NS_DispatchToMainThread(event, NS_DISPATCH_NORMAL);
|
|
}
|
|
}
|
|
items--;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
WindowsGamepadService::Startup() {
|
|
mThread = CreateThread(nullptr,
|
|
0,
|
|
DInputThread,
|
|
this,
|
|
0,
|
|
nullptr);
|
|
}
|
|
|
|
void
|
|
WindowsGamepadService::Shutdown() {
|
|
if (mThread) {
|
|
SetEvent(mThreadExitEvent);
|
|
WaitForSingleObject(mThread, INFINITE);
|
|
CloseHandle(mThread);
|
|
}
|
|
Cleanup();
|
|
}
|
|
|
|
void
|
|
WindowsGamepadService::Cleanup() {
|
|
for (unsigned int i = 0; i < mGamepads.Length(); i++) {
|
|
CleanupGamepad(mGamepads[i]);
|
|
}
|
|
mGamepads.Clear();
|
|
}
|
|
|
|
void
|
|
WindowsGamepadService::CleanupGamepad(Gamepad& gamepad) {
|
|
gamepad.device->Unacquire();
|
|
gamepad.device->SetEventNotification(nullptr);
|
|
CloseHandle(gamepad.event);
|
|
}
|
|
|
|
void
|
|
WindowsGamepadService::DevicesChanged(DeviceChangeType type) {
|
|
if (type == DeviceChangeNotification) {
|
|
mObserver->SetDeviceChangeTimer();
|
|
} else if (type == DeviceChangeStable) {
|
|
SetEvent(mThreadRescanEvent);
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
Observer::Observe(nsISupports* aSubject,
|
|
const char* aTopic,
|
|
const char16_t* aData) {
|
|
if (strcmp(aTopic, "timer-callback") == 0) {
|
|
mSvc.DevicesChanged(WindowsGamepadService::DeviceChangeStable);
|
|
} else if (strcmp(aTopic, NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID) == 0) {
|
|
Stop();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
WindowsGamepadService* gService = nullptr;
|
|
HWND sHWnd = nullptr;
|
|
|
|
static
|
|
LRESULT CALLBACK
|
|
GamepadWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
|
|
const unsigned int DBT_DEVICEARRIVAL = 0x8000;
|
|
const unsigned int DBT_DEVICEREMOVECOMPLETE = 0x8004;
|
|
const unsigned int DBT_DEVNODES_CHANGED = 0x7;
|
|
|
|
if (msg == WM_DEVICECHANGE &&
|
|
(wParam == DBT_DEVICEARRIVAL ||
|
|
wParam == DBT_DEVICEREMOVECOMPLETE ||
|
|
wParam == DBT_DEVNODES_CHANGED)) {
|
|
if (gService) {
|
|
gService->DevicesChanged(WindowsGamepadService::DeviceChangeNotification);
|
|
}
|
|
}
|
|
return DefWindowProc(hwnd, msg, wParam, lParam);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
namespace mozilla {
|
|
namespace hal_impl {
|
|
|
|
void StartMonitoringGamepadStatus()
|
|
{
|
|
if (gService)
|
|
return;
|
|
|
|
gService = new WindowsGamepadService();
|
|
gService->Startup();
|
|
|
|
if (sHWnd == nullptr) {
|
|
WNDCLASSW wc;
|
|
HMODULE hSelf = GetModuleHandle(nullptr);
|
|
|
|
if (!GetClassInfoW(hSelf, L"MozillaGamepadClass", &wc)) {
|
|
ZeroMemory(&wc, sizeof(WNDCLASSW));
|
|
wc.hInstance = hSelf;
|
|
wc.lpfnWndProc = GamepadWindowProc;
|
|
wc.lpszClassName = L"MozillaGamepadClass";
|
|
RegisterClassW(&wc);
|
|
}
|
|
|
|
sHWnd = CreateWindowW(L"MozillaGamepadClass", L"Gamepad Watcher",
|
|
0, 0, 0, 0, 0,
|
|
nullptr, nullptr, hSelf, nullptr);
|
|
}
|
|
}
|
|
|
|
void StopMonitoringGamepadStatus()
|
|
{
|
|
if (!gService)
|
|
return;
|
|
|
|
if (sHWnd) {
|
|
DestroyWindow(sHWnd);
|
|
sHWnd = nullptr;
|
|
}
|
|
|
|
gService->Shutdown();
|
|
delete gService;
|
|
gService = nullptr;
|
|
}
|
|
|
|
} // namespace hal_impl
|
|
} // namespace mozilla
|
|
|