Remove EvdevCaptureProvider components from non-root build
This commit is contained in:
Cameron Gutman
@@ -0,0 +1,322 @@
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package com.limelight.binding.input.evdev;
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import android.app.Activity;
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import android.os.Build;
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import android.os.Looper;
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import android.widget.Toast;
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import com.limelight.LimeLog;
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import com.limelight.binding.input.capture.InputCaptureProvider;
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import java.io.DataOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.ServerSocket;
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import java.net.Socket;
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public class EvdevCaptureProvider extends InputCaptureProvider {
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private final EvdevListener listener;
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private final String libraryPath;
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private boolean shutdown = false;
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private InputStream evdevIn;
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private OutputStream evdevOut;
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private Process su;
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private ServerSocket servSock;
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private Socket evdevSock;
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private Activity activity;
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private boolean started = false;
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private static final byte UNGRAB_REQUEST = 1;
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private static final byte REGRAB_REQUEST = 2;
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private final Thread handlerThread = new Thread() {
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@Override
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public void run() {
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int deltaX = 0;
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int deltaY = 0;
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byte deltaScroll = 0;
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// Bind a local listening socket for evdevreader to connect to
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try {
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servSock = new ServerSocket(0, 1);
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} catch (IOException e) {
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e.printStackTrace();
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return;
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}
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final String evdevReaderCmd = libraryPath+File.separatorChar+"libevdev_reader.so "+servSock.getLocalPort();
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// On Nougat and later, we'll need to pass the command directly to SU.
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// Writing to SU's input stream after it has started doesn't seem to work anymore.
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
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// Launch evdev_reader directly via SU
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try {
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su = Runtime.getRuntime().exec("su -c "+evdevReaderCmd);
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} catch (IOException e) {
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reportDeviceNotRooted();
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e.printStackTrace();
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return;
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}
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}
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else {
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// Launch a SU shell on Marshmallow and earlier
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ProcessBuilder builder = new ProcessBuilder("su");
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builder.redirectErrorStream(true);
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try {
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su = builder.start();
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} catch (IOException e) {
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reportDeviceNotRooted();
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e.printStackTrace();
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return;
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}
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// Start evdevreader
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DataOutputStream suOut = new DataOutputStream(su.getOutputStream());
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try {
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suOut.writeChars(evdevReaderCmd+"\n");
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} catch (IOException e) {
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reportDeviceNotRooted();
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e.printStackTrace();
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return;
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}
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}
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// Wait for evdevreader's connection
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LimeLog.info("Waiting for EvdevReader connection to port "+servSock.getLocalPort());
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try {
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evdevSock = servSock.accept();
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evdevIn = evdevSock.getInputStream();
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evdevOut = evdevSock.getOutputStream();
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} catch (IOException e) {
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e.printStackTrace();
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return;
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}
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LimeLog.info("EvdevReader connected from port "+evdevSock.getPort());
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while (!isInterrupted() && !shutdown) {
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EvdevEvent event;
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try {
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event = EvdevReader.read(evdevIn);
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} catch (IOException e) {
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event = null;
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}
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if (event == null) {
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break;
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}
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switch (event.type) {
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case EvdevEvent.EV_SYN:
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if (deltaX != 0 || deltaY != 0) {
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listener.mouseMove(deltaX, deltaY);
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deltaX = deltaY = 0;
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}
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if (deltaScroll != 0) {
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listener.mouseScroll(deltaScroll);
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deltaScroll = 0;
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}
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break;
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case EvdevEvent.EV_REL:
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switch (event.code) {
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case EvdevEvent.REL_X:
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deltaX = event.value;
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break;
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case EvdevEvent.REL_Y:
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deltaY = event.value;
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break;
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case EvdevEvent.REL_WHEEL:
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deltaScroll = (byte) event.value;
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break;
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}
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break;
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case EvdevEvent.EV_KEY:
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switch (event.code) {
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case EvdevEvent.BTN_LEFT:
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listener.mouseButtonEvent(EvdevListener.BUTTON_LEFT,
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event.value != 0);
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break;
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case EvdevEvent.BTN_MIDDLE:
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listener.mouseButtonEvent(EvdevListener.BUTTON_MIDDLE,
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event.value != 0);
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break;
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case EvdevEvent.BTN_RIGHT:
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listener.mouseButtonEvent(EvdevListener.BUTTON_RIGHT,
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event.value != 0);
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break;
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case EvdevEvent.BTN_SIDE:
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case EvdevEvent.BTN_EXTRA:
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case EvdevEvent.BTN_FORWARD:
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case EvdevEvent.BTN_BACK:
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case EvdevEvent.BTN_TASK:
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// Other unhandled mouse buttons
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break;
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default:
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// We got some unrecognized button. This means
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// someone is trying to use the other device in this
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// "combination" input device. We'll try to handle
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// it via keyboard, but we're not going to disconnect
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// if we can't
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short keyCode = EvdevTranslator.translateEvdevKeyCode(event.code);
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if (keyCode != 0) {
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listener.keyboardEvent(event.value != 0, keyCode);
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}
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break;
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}
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break;
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case EvdevEvent.EV_MSC:
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break;
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}
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}
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}
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};
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public EvdevCaptureProvider(Activity activity, EvdevListener listener) {
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this.listener = listener;
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this.activity = activity;
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this.libraryPath = activity.getApplicationInfo().nativeLibraryDir;
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}
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private void reportDeviceNotRooted() {
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activity.runOnUiThread(new Runnable() {
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@Override
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public void run() {
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Toast.makeText(activity, "This device is not rooted - Mouse capture is unavailable", Toast.LENGTH_LONG).show();
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}
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});
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}
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private void runInNetworkSafeContextSynchronously(Runnable runnable) {
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// This function is used to avoid Android's strict NetworkOnMainThreadException.
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// For our usage, it is highly unlikely to cause problems since we only do
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// write operations and only to localhost sockets.
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if (Looper.getMainLooper().getThread() == Thread.currentThread()) {
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Thread t = new Thread(runnable);
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t.start();
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try {
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t.join();
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} catch (InterruptedException e) {
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// The main thread should never be interrupted
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e.printStackTrace();
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}
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}
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else {
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// Run the runnable directly
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runnable.run();
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}
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}
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@Override
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public void enableCapture() {
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super.enableCapture();
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if (!started) {
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// Start the handler thread if it's our first time
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// capturing
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handlerThread.start();
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started = true;
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}
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else {
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// This may be called on the main thread
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runInNetworkSafeContextSynchronously(new Runnable() {
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@Override
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public void run() {
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// Send a request to regrab if we're already capturing
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if (!shutdown && evdevOut != null) {
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try {
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evdevOut.write(REGRAB_REQUEST);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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});
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}
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}
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@Override
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public void disableCapture() {
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super.disableCapture();
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// This may be called on the main thread
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runInNetworkSafeContextSynchronously(new Runnable() {
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@Override
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public void run() {
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if (started && !shutdown && evdevOut != null) {
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try {
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evdevOut.write(UNGRAB_REQUEST);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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});
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}
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@Override
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public void destroy() {
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// We need to stop the process in this context otherwise
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// we could get stuck waiting on output from the process
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// in order to terminate it.
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//
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// This may be called on the main thread.
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if (!started) {
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return;
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}
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shutdown = true;
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handlerThread.interrupt();
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runInNetworkSafeContextSynchronously(new Runnable() {
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@Override
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public void run() {
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if (servSock != null) {
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try {
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servSock.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (evdevSock != null) {
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try {
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evdevSock.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (evdevIn != null) {
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try {
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evdevIn.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (evdevOut != null) {
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try {
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evdevOut.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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});
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if (su != null) {
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su.destroy();
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}
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try {
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handlerThread.join();
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} catch (InterruptedException ignored) {}
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}
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}
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