1 files changed, 166 insertions, 0 deletions
diff --git a/java/com/android/dialer/simulator/impl/SimulatorPreviewCamera.java b/java/com/android/dialer/simulator/impl/SimulatorPreviewCamera.java
new file mode 100644
index 000000000..e089f75ff
--- /dev/null
+++ b/java/com/android/dialer/simulator/impl/SimulatorPreviewCamera.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2017 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.dialer.simulator.impl;
+
+import android.content.Context;
+import android.graphics.SurfaceTexture;
+import android.hardware.camera2.CameraAccessException;
+import android.hardware.camera2.CameraCaptureSession;
+import android.hardware.camera2.CameraCharacteristics;
+import android.hardware.camera2.CameraDevice;
+import android.hardware.camera2.CameraManager;
+import android.hardware.camera2.CameraMetadata;
+import android.hardware.camera2.CaptureRequest;
+import android.hardware.camera2.params.StreamConfigurationMap;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.telecom.VideoProfile.CameraCapabilities;
+import android.util.Size;
+import android.view.Surface;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+import java.util.Arrays;
+
+/**
+ * Used by the video provider to draw the local camera. The in-call UI is responsible for setting
+ * the camera (front or back) and the view to draw to. The video provider then uses this class to
+ * capture frames from the given camera and draw to the given view.
+ */
+final class SimulatorPreviewCamera {
+  @NonNull private final Context context;
+  @NonNull private final String cameraId;
+  @NonNull private final Surface surface;
+  @Nullable private CameraDevice camera;
+  private boolean isStopped;
+
+  SimulatorPreviewCamera(
+      @NonNull Context context, @NonNull String cameraId, @NonNull Surface surface) {
+    this.context = Assert.isNotNull(context);
+    this.cameraId = Assert.isNotNull(cameraId);
+    this.surface = Assert.isNotNull(surface);
+  }
+
+  void startCamera() {
+    LogUtil.enterBlock("SimulatorPreviewCamera.startCamera");
+    Assert.checkState(!isStopped);
+    try {
+      context
+          .getSystemService(CameraManager.class)
+          .openCamera(cameraId, new CameraListener(), null /* handler */);
+    } catch (CameraAccessException | SecurityException e) {
+      throw Assert.createIllegalStateFailException("camera error: " + e);
+    }
+  }
+
+  void stopCamera() {
+    LogUtil.enterBlock("SimulatorPreviewCamera.stopCamera");
+    isStopped = true;
+    if (camera != null) {
+      camera.close();
+      camera = null;
+    }
+  }
+
+  @Nullable
+  static CameraCapabilities getCameraCapabilities(
+      @NonNull Context context, @Nullable String cameraId) {
+    if (cameraId == null) {
+      LogUtil.e("SimulatorPreviewCamera.getCameraCapabilities", "null camera ID");
+      return null;
+    }
+
+    CameraManager cameraManager = context.getSystemService(CameraManager.class);
+    CameraCharacteristics characteristics;
+    try {
+      characteristics = cameraManager.getCameraCharacteristics(cameraId);
+    } catch (CameraAccessException e) {
+      throw Assert.createIllegalStateFailException("camera error: " + e);
+    }
+
+    StreamConfigurationMap map =
+        characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
+    Size previewSize = map.getOutputSizes(SurfaceTexture.class)[0];
+    LogUtil.i("SimulatorPreviewCamera.getCameraCapabilities", "preview size: " + previewSize);
+    return new CameraCapabilities(previewSize.getWidth(), previewSize.getHeight());
+  }
+
+  private final class CameraListener extends CameraDevice.StateCallback {
+    @Override
+    public void onOpened(CameraDevice camera) {
+      LogUtil.enterBlock("SimulatorPreviewCamera.CameraListener.onOpened");
+      SimulatorPreviewCamera.this.camera = camera;
+      if (isStopped) {
+        LogUtil.i("SimulatorPreviewCamera.CameraListener.onOpened", "stopped");
+        stopCamera();
+        return;
+      }
+
+      try {
+        camera.createCaptureSession(
+            Arrays.asList(Assert.isNotNull(surface)),
+            new CaptureSessionCallback(),
+            null /* handler */);
+      } catch (CameraAccessException e) {
+        throw Assert.createIllegalStateFailException("camera error: " + e);
+      }
+    }
+
+    @Override
+    public void onError(CameraDevice camera, int error) {
+      LogUtil.i("SimulatorPreviewCamera.CameraListener.onError", "error: " + error);
+      stopCamera();
+    }
+
+    @Override
+    public void onDisconnected(CameraDevice camera) {
+      LogUtil.enterBlock("SimulatorPreviewCamera.CameraListener.onDisconnected");
+      stopCamera();
+    }
+
+    @Override
+    public void onClosed(CameraDevice camera) {
+      LogUtil.enterBlock("SimulatorPreviewCamera.CameraListener.onCLosed");
+    }
+  }
+
+  private final class CaptureSessionCallback extends CameraCaptureSession.StateCallback {
+    @Override
+    public void onConfigured(@NonNull CameraCaptureSession session) {
+      LogUtil.enterBlock("SimulatorPreviewCamera.CaptureSessionCallback.onConfigured");
+
+      if (isStopped) {
+        LogUtil.i("SimulatorPreviewCamera.CaptureSessionCallback.onConfigured", "stopped");
+        stopCamera();
+        return;
+      }
+      try {
+        CaptureRequest.Builder builder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
+        builder.addTarget(surface);
+        builder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
+        session.setRepeatingRequest(
+            builder.build(), null /* captureCallback */, null /* handler */);
+      } catch (CameraAccessException e) {
+        throw Assert.createIllegalStateFailException("camera error: " + e);
+      }
+    }
+
+    @Override
+    public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
+      LogUtil.enterBlock("SimulatorPreviewCamera.CaptureSessionCallback.onConfigureFailed");
+    }
+  }
+}