Initial camera device implementation
* Working streaming preview requests only
* Almost everything else returns empty objects that don't do anything
Bug: 9213377
Change-Id: Ie6f02a7c0952b0f5ebc41905425b15cae221f7d3
diff --git a/core/java/android/hardware/photography/impl/CameraDevice.java b/core/java/android/hardware/photography/impl/CameraDevice.java
new file mode 100644
index 0000000..b1e3f6a
--- /dev/null
+++ b/core/java/android/hardware/photography/impl/CameraDevice.java
@@ -0,0 +1,322 @@
+/*
+ * Copyright (C) 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 android.hardware.photography.impl;
+
+import android.hardware.photography.CameraMetadata;
+import android.hardware.photography.CaptureResult;
+import android.hardware.photography.ICameraDeviceUser;
+import android.hardware.photography.ICameraDeviceCallbacks;
+import android.hardware.photography.CameraAccessException;
+import android.hardware.photography.CameraProperties;
+import android.hardware.photography.CaptureRequest;
+import android.hardware.photography.utils.CameraRuntimeException;
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+import android.view.Surface;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Stack;
+
+/**
+ * HAL2.1+ implementation of CameraDevice Use CameraManager#open to instantiate
+ */
+public class CameraDevice implements android.hardware.photography.CameraDevice {
+
+ private final String TAG;
+
+ // TODO: guard every function with if (!mRemoteDevice) check (if it was closed)
+ private ICameraDeviceUser mRemoteDevice;
+
+ private final Object mLock = new Object();
+ private final CameraDeviceCallbacks mCallbacks = new CameraDeviceCallbacks();
+
+ // XX: Make this a WeakReference<CaptureListener> ?
+ private final HashMap<Integer, CaptureListenerHolder> mCaptureListenerMap =
+ new HashMap<Integer, CaptureListenerHolder>();
+
+ private final Stack<Integer> mRepeatingRequestIdStack = new Stack<Integer>();
+
+ private final String mCameraId;
+
+ public CameraDevice(String cameraId) {
+ mCameraId = cameraId;
+ TAG = String.format("CameraDevice-%s-JV", mCameraId);
+ }
+
+ public CameraDeviceCallbacks getCallbacks() {
+ return mCallbacks;
+ }
+
+ /**
+ * @hide
+ */
+ public void setRemoteDevice(ICameraDeviceUser remoteDevice) {
+ mRemoteDevice = remoteDevice;
+ }
+
+ @Override
+ public CameraProperties getProperties() throws CameraAccessException {
+ // TODO
+ Log.v(TAG, "TODO: Implement getProperties");
+ return new CameraProperties();
+ }
+
+ @Override
+ public void configureOutputs(List<Surface> outputs) throws CameraAccessException {
+ synchronized (mLock) {
+ // TODO: delete outputs that aren't in this list that were configured previously
+ for (Surface s : outputs) {
+ try {
+ // TODO: remove width,height,format since we are ignoring
+ // it.
+ mRemoteDevice.createStream(0, 0, 0, s);
+ } catch (CameraRuntimeException e) {
+ throw e.asChecked();
+ } catch (RemoteException e) {
+ // impossible
+ return;
+ }
+ }
+ }
+ }
+
+ @Override
+ public CaptureRequest createCaptureRequest(int templateType) throws CameraAccessException {
+
+ synchronized (mLock) {
+
+ CameraMetadata templatedRequest = new CameraMetadata();
+
+ try {
+ mRemoteDevice.createDefaultRequest(templateType, /* out */templatedRequest);
+ } catch (CameraRuntimeException e) {
+ throw e.asChecked();
+ } catch (RemoteException e) {
+ // impossible
+ return null;
+ }
+
+ CaptureRequest request = new CaptureRequest();
+
+ // XX: could also change binder signature but that's more work than
+ // just using swap.
+ request.swap(templatedRequest);
+
+ return request;
+
+ }
+ }
+
+ @Override
+ public void capture(CaptureRequest request, CaptureListener listener)
+ throws CameraAccessException {
+ submitCaptureRequest(request, listener, /*streaming*/false);
+ }
+
+ @Override
+ public void captureBurst(List<CaptureRequest> requests, CaptureListener listener)
+ throws CameraAccessException {
+ // TODO
+ throw new UnsupportedOperationException("Burst capture implemented yet");
+
+ }
+
+ private void submitCaptureRequest(CaptureRequest request, CaptureListener listener,
+ boolean repeating) throws CameraAccessException {
+
+ synchronized (mLock) {
+
+ int requestId;
+
+ try {
+ requestId = mRemoteDevice.submitRequest(request, repeating);
+ } catch (CameraRuntimeException e) {
+ throw e.asChecked();
+ } catch (RemoteException e) {
+ // impossible
+ return;
+ }
+
+ mCaptureListenerMap.put(requestId, new CaptureListenerHolder(listener, request,
+ repeating));
+
+ if (repeating) {
+ mRepeatingRequestIdStack.add(requestId);
+ }
+
+ }
+ }
+
+ @Override
+ public void setRepeatingRequest(CaptureRequest request, CaptureListener listener)
+ throws CameraAccessException {
+ submitCaptureRequest(request, listener, /*streaming*/true);
+ }
+
+ @Override
+ public void setRepeatingBurst(List<CaptureRequest> requests, CaptureListener listener)
+ throws CameraAccessException {
+ // TODO
+ throw new UnsupportedOperationException("Burst capture implemented yet");
+ }
+
+ @Override
+ public void stopRepeating() throws CameraAccessException {
+
+ synchronized (mLock) {
+
+ while (!mRepeatingRequestIdStack.isEmpty()) {
+ int requestId = mRepeatingRequestIdStack.pop();
+
+ try {
+ mRemoteDevice.cancelRequest(requestId);
+ } catch (CameraRuntimeException e) {
+ throw e.asChecked();
+ } catch (RemoteException e) {
+ // impossible
+ return;
+ }
+ }
+ }
+ }
+
+ @Override
+ public void waitUntilIdle() throws CameraAccessException {
+ // TODO: implement
+ }
+
+ @Override
+ public void setErrorListener(ErrorListener listener) {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void close() throws Exception {
+
+ // TODO: every method should throw IllegalStateException after close has been called
+
+ synchronized (mLock) {
+
+ try {
+ mRemoteDevice.disconnect();
+ } catch (CameraRuntimeException e) {
+ throw e.asChecked();
+ } catch (RemoteException e) {
+ // impossible
+ }
+
+ mRemoteDevice = null;
+
+ }
+ }
+
+ @Override
+ protected void finalize() throws Throwable {
+ try {
+ close();
+ } catch (CameraRuntimeException e) {
+ Log.e(TAG, "Got error while trying to finalize, ignoring: " + e.getMessage());
+ }
+ finally {
+ super.finalize();
+ }
+ }
+
+ static class CaptureListenerHolder {
+
+ private final boolean mRepeating;
+ private final CaptureListener mListener;
+ private final CaptureRequest mRequest;
+
+ CaptureListenerHolder(CaptureListener listener, CaptureRequest request, boolean repeating) {
+ mRepeating = repeating;
+ mRequest = request;
+ mListener = listener;
+ }
+
+ public boolean isRepeating() {
+ return mRepeating;
+ }
+
+ public CaptureListener getListener() {
+ return mListener;
+ }
+
+ public CaptureRequest getRequest() {
+ return mRequest;
+ }
+ }
+
+ // TODO: unit tests
+ public class CameraDeviceCallbacks extends Binder implements ICameraDeviceCallbacks {
+
+ @Override
+ public IBinder asBinder() {
+ return this;
+ }
+
+ // TODO: consider rename to onMessageReceived
+ @Override
+ public void notifyCallback(int msgType, int ext1, int ext2) throws RemoteException {
+ Log.d(TAG, "Got message " + msgType + " ext1: " + ext1 + " , ext2: " + ext2);
+ // TODO implement rest
+ }
+
+ @Override
+ public void onResultReceived(int frameId, CameraMetadata result) throws RemoteException {
+ Log.d(TAG, "Received result for frameId " + frameId);
+
+ CaptureListenerHolder holder;
+
+ synchronized (mLock) {
+ // TODO: move this whole map into this class to make it more testable,
+ // exposing the methods necessary like subscribeToRequest, unsubscribe..
+ // TODO: make class static class
+
+ holder = CameraDevice.this.mCaptureListenerMap.get(frameId);
+
+ // Clean up listener once we no longer expect to see it.
+
+ // TODO: how to handle repeating listeners?
+ // we probably want cancelRequest to return # of times it already enqueued and
+ // keep a counter.
+ if (holder != null && !holder.isRepeating()) {
+ CameraDevice.this.mCaptureListenerMap.remove(frameId);
+ }
+ }
+
+ if (holder == null) {
+ Log.e(TAG, "Result had no listener holder associated with it, dropping result");
+ return;
+ }
+
+ CaptureResult resultAsCapture = new CaptureResult();
+ resultAsCapture.swap(result);
+
+ if (holder.getListener() != null) {
+ holder.getListener().onCaptureComplete(CameraDevice.this, holder.getRequest(),
+ resultAsCapture);
+ }
+ }
+
+ }
+
+}