1 files changed, 93 insertions, 0 deletions
diff --git a/tests/Camera2Tests/SmartCamera/SimpleCamera/src/androidx/media/filterfw/samples/simplecamera/CameraTestThread.java b/tests/Camera2Tests/SmartCamera/SimpleCamera/src/androidx/media/filterfw/samples/simplecamera/CameraTestThread.java
new file mode 100644
index 0000000..8a0fced
--- /dev/null
+++ b/tests/Camera2Tests/SmartCamera/SimpleCamera/src/androidx/media/filterfw/samples/simplecamera/CameraTestThread.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media.filterfw.samples.simplecamera;
+
+import android.os.ConditionVariable;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Camera test thread wrapper for handling camera callbacks
+ */
+public class CameraTestThread implements AutoCloseable {
+    private static final String TAG = "CameraTestThread";
+    private static final boolean VERBOSE = Log.isLoggable(TAG, Log.VERBOSE);
+    // Timeout for initializing looper and opening camera in Milliseconds.
+    private static final long WAIT_FOR_COMMAND_TO_COMPLETE = 5000;
+    private Looper mLooper = null;
+    private Handler mHandler = null;
+
+    /**
+     * Create and start a looper thread, return the Handler
+     */
+    public synchronized Handler start() throws Exception {
+        final ConditionVariable startDone = new ConditionVariable();
+        if (mLooper != null || mHandler !=null) {
+            Log.w(TAG, "Looper thread already started");
+            return mHandler;
+        }
+
+        new Thread() {
+            @Override
+            public void run() {
+                if (VERBOSE) Log.v(TAG, "start loopRun");
+                Looper.prepare();
+                // Save the looper so that we can terminate this thread
+                // after we are done with it.
+                mLooper = Looper.myLooper();
+                mHandler = new Handler();
+                startDone.open();
+                Looper.loop();
+                if (VERBOSE) Log.v(TAG, "createLooperThread: finished");
+            }
+        }.start();
+
+        if (VERBOSE) Log.v(TAG, "start waiting for looper");
+        if (!startDone.block(WAIT_FOR_COMMAND_TO_COMPLETE)) {
+            throw new TimeoutException("createLooperThread: start timeout");
+        }
+        return mHandler;
+    }
+
+    /**
+     * Terminate the looper thread
+     */
+    public synchronized void close() throws Exception {
+        if (mLooper == null || mHandler == null) {
+            Log.w(TAG, "Looper thread doesn't start yet");
+            return;
+        }
+
+        if (VERBOSE) Log.v(TAG, "Terminate looper thread");
+        mLooper.quit();
+        mLooper.getThread().join();
+        mLooper = null;
+        mHandler = null;
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        try {
+            close();
+        } finally {
+            super.finalize();
+        }
+    }
+}