Handle camera disconnection

Stop mirroring on camera disconnection.

PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>

server/src/main/java/com/genymobile/scrcpy/CameraCapture.java

@@ -22,6 +22,7 @@ import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 public class CameraCapture extends SurfaceCapture {
 
@@ -33,6 +34,8 @@ public class CameraCapture extends SurfaceCapture {
     private CameraDevice cameraDevice;
     private Executor cameraExecutor;
 
+    private final AtomicBoolean disconnected = new AtomicBoolean();
+
     public CameraCapture(String explicitCameraId, Size explicitSize) {
         this.explicitCameraId = explicitCameraId;
         this.explicitSize = explicitSize;
@@ -97,7 +100,8 @@ public class CameraCapture extends SurfaceCapture {
             @Override
             public void onDisconnected(CameraDevice camera) {
                 Ln.w("Camera disconnected");
-                // TODO
+                disconnected.set(true);
+                requestReset();
             }
 
             @Override
@@ -177,4 +181,9 @@ public class CameraCapture extends SurfaceCapture {
             }
         }, cameraHandler);
     }
+
+    @Override
+    public boolean isClosed() {
+        return disconnected.get();
+    }
 }

server/src/main/java/com/genymobile/scrcpy/SurfaceCapture.java

@@ -59,4 +59,13 @@ public abstract class SurfaceCapture {
      * @param maxSize Maximum size
      */
     public abstract boolean setMaxSize(int maxSize);
+
+    /**
+     * Indicate if the capture has been closed internally.
+     *
+     * @return {@code true} is the capture is closed, {@code false} otherwise.
+     */
+    public boolean isClosed() {
+        return false;
+    }
 }

server/src/main/java/com/genymobile/scrcpy/SurfaceEncoder.java

@@ -181,6 +181,11 @@ public class SurfaceEncoder implements AsyncProcessor {
             }
         }
 
+        if (capture.isClosed()) {
+            // The capture might have been closed internally (for example if the camera is disconnected)
+            alive = false;
+        }
+
         return !eof && alive;
     }