1 files changed, 125 insertions, 0 deletions
diff --git a/java/com/android/dialer/callcomposer/camera/HardwareCameraPreview.java b/java/com/android/dialer/callcomposer/camera/HardwareCameraPreview.java
new file mode 100644
index 000000000..c0d61f3f8
--- /dev/null
+++ b/java/com/android/dialer/callcomposer/camera/HardwareCameraPreview.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2016 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.callcomposer.camera;
+
+import android.content.Context;
+import android.graphics.SurfaceTexture;
+import android.hardware.Camera;
+import android.os.Parcelable;
+import android.util.AttributeSet;
+import android.view.TextureView;
+import android.view.View;
+import java.io.IOException;
+
+/**
+ * A hardware accelerated preview texture for the camera. This is the preferred CameraPreview
+ * because it animates smoother. When hardware acceleration isn't available, SoftwareCameraPreview
+ * is used.
+ *
+ * <p>There is a significant amount of duplication between HardwareCameraPreview and
+ * SoftwareCameraPreview which we can't easily share due to a lack of multiple inheritance, The
+ * implementations of the shared methods are delegated to CameraPreview
+ */
+public class HardwareCameraPreview extends TextureView implements CameraPreview.CameraPreviewHost {
+  private CameraPreview mPreview;
+
+  public HardwareCameraPreview(final Context context, final AttributeSet attrs) {
+    super(context, attrs);
+    mPreview = new CameraPreview(this);
+    setSurfaceTextureListener(
+        new SurfaceTextureListener() {
+          @Override
+          public void onSurfaceTextureAvailable(
+              final SurfaceTexture surfaceTexture, final int i, final int i2) {
+            CameraManager.get().setSurface(mPreview);
+          }
+
+          @Override
+          public void onSurfaceTextureSizeChanged(
+              final SurfaceTexture surfaceTexture, final int i, final int i2) {
+            CameraManager.get().setSurface(mPreview);
+          }
+
+          @Override
+          public boolean onSurfaceTextureDestroyed(final SurfaceTexture surfaceTexture) {
+            CameraManager.get().setSurface(null);
+            return true;
+          }
+
+          @Override
+          public void onSurfaceTextureUpdated(final SurfaceTexture surfaceTexture) {
+            CameraManager.get().setSurface(mPreview);
+          }
+        });
+  }
+
+  @Override
+  public void setShown() {
+    mPreview.setShown();
+  }
+
+  @Override
+  protected void onVisibilityChanged(final View changedView, final int visibility) {
+    super.onVisibilityChanged(changedView, visibility);
+    mPreview.onVisibilityChanged(visibility);
+  }
+
+  @Override
+  protected void onDetachedFromWindow() {
+    super.onDetachedFromWindow();
+    mPreview.onDetachedFromWindow();
+  }
+
+  @Override
+  protected void onAttachedToWindow() {
+    super.onAttachedToWindow();
+    mPreview.onAttachedToWindow();
+  }
+
+  @Override
+  protected void onRestoreInstanceState(final Parcelable state) {
+    super.onRestoreInstanceState(state);
+    mPreview.onRestoreInstanceState();
+  }
+
+  @Override
+  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+    widthMeasureSpec = mPreview.getWidthMeasureSpec(widthMeasureSpec, heightMeasureSpec);
+    heightMeasureSpec = mPreview.getHeightMeasureSpec(widthMeasureSpec, heightMeasureSpec);
+    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+  }
+
+  @Override
+  public View getView() {
+    return this;
+  }
+
+  @Override
+  public boolean isValid() {
+    return getSurfaceTexture() != null;
+  }
+
+  @Override
+  public void startPreview(final Camera camera) throws IOException {
+    camera.setPreviewTexture(getSurfaceTexture());
+  }
+
+  @Override
+  public void onCameraPermissionGranted() {
+    mPreview.onCameraPermissionGranted();
+  }
+}