1 files changed, 268 insertions, 0 deletions
diff --git a/java/com/android/incallui/answer/impl/SelfManagedAnswerVideoCallScreen.java b/java/com/android/incallui/answer/impl/SelfManagedAnswerVideoCallScreen.java
new file mode 100644
index 000000000..522d77235
--- /dev/null
+++ b/java/com/android/incallui/answer/impl/SelfManagedAnswerVideoCallScreen.java
@@ -0,0 +1,268 @@
+/*
+ * 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.incallui.answer.impl;
+
+import android.content.Context;
+import android.hardware.camera2.CameraAccessException;
+import android.hardware.camera2.CameraCaptureSession;
+import android.hardware.camera2.CameraCharacteristics;
+import android.hardware.camera2.CameraDevice;
+import android.hardware.camera2.CameraDevice.StateCallback;
+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.support.v4.app.Fragment;
+import android.util.Size;
+import android.view.Surface;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.View;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+import com.android.incallui.video.protocol.VideoCallScreen;
+import java.util.Arrays;
+
+/**
+ * Shows the local preview for the incoming video call or video upgrade request. This class is used
+ * for RCS Video Share where we need to open the camera preview ourselves. For IMS Video the camera
+ * is managed by the modem, see {@link AnswerVideoCallScreen}.
+ */
+public class SelfManagedAnswerVideoCallScreen extends StateCallback implements VideoCallScreen {
+
+  private static final int MAX_WIDTH = 1920;
+  private static final float ASPECT_TOLERANCE = 0.1f;
+  private static final float TARGET_ASPECT = 16.f / 9.f;
+
+  @NonNull private final String callId;
+  @NonNull private final Fragment fragment;
+  @NonNull private final FixedAspectSurfaceView surfaceView;
+  private final Context context;
+
+  private String cameraId;
+  private CameraDevice camera;
+  private CaptureRequest.Builder captureRequestBuilder;
+
+  public SelfManagedAnswerVideoCallScreen(
+      @NonNull String callId, @NonNull Fragment fragment, @NonNull View view) {
+    this.callId = Assert.isNotNull(callId);
+    this.fragment = Assert.isNotNull(fragment);
+    this.context = Assert.isNotNull(fragment.getContext());
+
+    surfaceView =
+        Assert.isNotNull(
+            (FixedAspectSurfaceView) view.findViewById(R.id.incoming_preview_surface_view));
+    surfaceView.setVisibility(View.VISIBLE);
+    view.findViewById(R.id.incoming_preview_texture_view_overlay).setVisibility(View.VISIBLE);
+    view.setBackgroundColor(0xff000000);
+  }
+
+  @Override
+  public void onVideoScreenStart() {
+    openCamera();
+  }
+
+  @Override
+  public void onVideoScreenStop() {
+    closeCamera();
+  }
+
+  @Override
+  public void showVideoViews(
+      boolean shouldShowPreview, boolean shouldShowRemote, boolean isRemotelyHeld) {}
+
+  @Override
+  public void onLocalVideoDimensionsChanged() {}
+
+  @Override
+  public void onLocalVideoOrientationChanged() {}
+
+  @Override
+  public void onRemoteVideoDimensionsChanged() {}
+
+  @Override
+  public void updateFullscreenAndGreenScreenMode(
+      boolean shouldShowFullscreen, boolean shouldShowGreenScreen) {}
+
+  @Override
+  public Fragment getVideoCallScreenFragment() {
+    return fragment;
+  }
+
+  @Override
+  public String getCallId() {
+    return callId;
+  }
+
+  /**
+   * Opens the first front facing camera on the device into a {@link SurfaceView} while preserving
+   * aspect ratio.
+   */
+  private void openCamera() {
+    CameraManager manager = context.getSystemService(CameraManager.class);
+
+    StreamConfigurationMap configMap = getFrontFacingCameraSizes(manager);
+    if (configMap == null) {
+      return;
+    }
+
+    Size previewSize = getOptimalSize(configMap.getOutputSizes(SurfaceHolder.class));
+    LogUtil.i("SelfManagedAnswerVideoCallScreen.openCamera", "Optimal size: " + previewSize);
+    float outputAspect = (float) previewSize.getWidth() / previewSize.getHeight();
+    surfaceView.setAspectRatio(outputAspect);
+    surfaceView.getHolder().setFixedSize(previewSize.getWidth(), previewSize.getHeight());
+
+    try {
+      manager.openCamera(cameraId, this, null);
+    } catch (CameraAccessException e) {
+      LogUtil.e("SelfManagedAnswerVideoCallScreen.openCamera", "failed to open camera", e);
+    }
+  }
+
+  @Nullable
+  private StreamConfigurationMap getFrontFacingCameraSizes(CameraManager manager) {
+    String[] cameraIds;
+    try {
+      cameraIds = manager.getCameraIdList();
+    } catch (CameraAccessException e) {
+      LogUtil.e(
+          "SelfManagedAnswerVideoCallScreen.getFrontFacingCameraSizes",
+          "failed to get camera ids",
+          e);
+      return null;
+    }
+
+    for (String cameraId : cameraIds) {
+      CameraCharacteristics characteristics;
+      try {
+        characteristics = manager.getCameraCharacteristics(cameraId);
+      } catch (CameraAccessException e) {
+        LogUtil.e(
+            "SelfManagedAnswerVideoCallScreen.getFrontFacingCameraSizes",
+            "failed to get camera characteristics",
+            e);
+        continue;
+      }
+
+      if (characteristics.get(CameraCharacteristics.LENS_FACING)
+          != CameraCharacteristics.LENS_FACING_FRONT) {
+        continue;
+      }
+
+      StreamConfigurationMap configMap =
+          characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
+      if (configMap == null) {
+        continue;
+      }
+
+      this.cameraId = cameraId;
+      return configMap;
+    }
+    LogUtil.e(
+        "SelfManagedAnswerVideoCallScreen.getFrontFacingCameraSizes", "No valid configurations.");
+    return null;
+  }
+
+  /**
+   * Given an array of {@link Size}s, tries to find the largest Size such that the aspect ratio of
+   * the returned size is within {@code ASPECT_TOLERANCE} of {@code TARGET_ASPECT}. This is useful
+   * because it provides us with an adequate size/camera resolution that will experience the least
+   * stretching from our fullscreen UI that doesn't match any of the camera sizes.
+   */
+  private static Size getOptimalSize(Size[] outputSizes) {
+    Size bestCandidateSize = outputSizes[0];
+    float bestCandidateAspect =
+        (float) bestCandidateSize.getWidth() / bestCandidateSize.getHeight();
+
+    for (Size candidateSize : outputSizes) {
+      if (candidateSize.getWidth() < MAX_WIDTH) {
+        float candidateAspect = (float) candidateSize.getWidth() / candidateSize.getHeight();
+        boolean isGoodCandidateAspect =
+            Math.abs(candidateAspect - TARGET_ASPECT) < ASPECT_TOLERANCE;
+        boolean isGoodOutputAspect =
+            Math.abs(bestCandidateAspect - TARGET_ASPECT) < ASPECT_TOLERANCE;
+
+        if ((isGoodCandidateAspect && !isGoodOutputAspect)
+            || candidateSize.getWidth() > bestCandidateSize.getWidth()) {
+          bestCandidateSize = candidateSize;
+          bestCandidateAspect = candidateAspect;
+        }
+      }
+    }
+    return bestCandidateSize;
+  }
+
+  @Override
+  public void onOpened(CameraDevice camera) {
+    LogUtil.i("SelfManagedAnswerVideoCallScreen.opOpened", "camera opened.");
+    this.camera = camera;
+    Surface surface = surfaceView.getHolder().getSurface();
+    try {
+      captureRequestBuilder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
+      captureRequestBuilder.addTarget(surface);
+      camera.createCaptureSession(Arrays.asList(surface), new CaptureSessionCallback(), null);
+    } catch (CameraAccessException e) {
+      LogUtil.e(
+          "SelfManagedAnswerVideoCallScreen.createCameraPreview", "failed to create preview", e);
+    }
+  }
+
+  @Override
+  public void onDisconnected(CameraDevice camera) {
+    closeCamera();
+  }
+
+  @Override
+  public void onError(CameraDevice camera, int error) {
+    closeCamera();
+  }
+
+  private void closeCamera() {
+    if (camera != null) {
+      camera.close();
+      camera = null;
+    }
+  }
+
+  private class CaptureSessionCallback extends CameraCaptureSession.StateCallback {
+
+    @Override
+    public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
+      LogUtil.i(
+          "SelfManagedAnswerVideoCallScreen.onConfigured", "camera capture session configured.");
+      // The camera is already closed.
+      if (camera == null) {
+        return;
+      }
+
+      // When the session is ready, we start displaying the preview.
+      captureRequestBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
+      try {
+        cameraCaptureSession.setRepeatingRequest(captureRequestBuilder.build(), null, null);
+      } catch (CameraAccessException e) {
+        LogUtil.e("CaptureSessionCallback.onConfigured", "failed to configure", e);
+      }
+    }
+
+    @Override
+    public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
+      LogUtil.e("CaptureSessionCallback.onConfigureFailed", "failed to configure");
+    }
+  }
+}