1 files changed, 95 insertions, 0 deletions
diff --git a/camera2/utils/src/com/android/ex/camera2/utils/Camera2CaptureCallbackSplitter.java b/camera2/utils/src/com/android/ex/camera2/utils/Camera2CaptureCallbackSplitter.java
new file mode 100644
index 0000000..86c6070
--- /dev/null
+++ b/camera2/utils/src/com/android/ex/camera2/utils/Camera2CaptureCallbackSplitter.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2014 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 com.android.ex.camera2.utils;
+
+import android.hardware.camera2.CameraCaptureSession;
+import android.hardware.camera2.CameraCaptureSession.CaptureCallback;
+import android.hardware.camera2.CaptureFailure;
+import android.hardware.camera2.CaptureRequest;
+import android.hardware.camera2.CaptureResult;
+import android.hardware.camera2.TotalCaptureResult;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Junction that allows notifying multiple {@link CaptureCallback}s whenever
+ * the {@link CameraCaptureSession} posts a capture-related update.
+ */
+public class Camera2CaptureCallbackSplitter extends CaptureCallback {
+    private final List<CaptureCallback> mRecipients = new LinkedList<>();
+
+    /**
+     * @param recipients The listeners to notify. Any {@code null} passed here
+     *                   will be completely ignored.
+     */
+    public Camera2CaptureCallbackSplitter(CaptureCallback... recipients) {
+        for (CaptureCallback listener : recipients) {
+            if (listener != null) {
+                mRecipients.add(listener);
+            }
+        }
+    }
+
+    @Override
+    public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
+                                   TotalCaptureResult result) {
+        for (CaptureCallback target : mRecipients) {
+            target.onCaptureCompleted(session, request, result);
+        }
+    }
+
+    @Override
+    public void onCaptureFailed(CameraCaptureSession session, CaptureRequest request,
+                                CaptureFailure failure) {
+        for (CaptureCallback target : mRecipients) {
+            target.onCaptureFailed(session, request, failure);
+        }
+    }
+
+    @Override
+    public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request,
+                                    CaptureResult partialResult) {
+        for (CaptureCallback target : mRecipients) {
+            target.onCaptureProgressed(session, request, partialResult);
+        }
+    }
+
+    @Override
+    public void onCaptureSequenceAborted(CameraCaptureSession session, int sequenceId) {
+        for (CaptureCallback target : mRecipients) {
+            target.onCaptureSequenceAborted(session, sequenceId);
+        }
+    }
+
+    @Override
+    public void onCaptureSequenceCompleted(CameraCaptureSession session, int sequenceId,
+                                           long frameNumber) {
+        for (CaptureCallback target : mRecipients) {
+            target.onCaptureSequenceCompleted(session, sequenceId, frameNumber);
+        }
+    }
+
+    @Override
+    public void onCaptureStarted(CameraCaptureSession session, CaptureRequest request,
+                                 long timestamp, long frameNumber) {
+        for (CaptureCallback target : mRecipients) {
+            target.onCaptureStarted(session, request, timestamp, frameNumber);
+        }
+    }
+}