get Optimal Video Snapshot Picture Size - Android Media

Android examples for Media:Video

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Description

get Optimal Video Snapshot Picture Size

Demo Code

/*/*from  www .  ja  v a2  s . com*/
 * Copyright (C) 2009 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.
 */
import java.util.List;

import android.hardware.Camera.Size;
import android.util.Log;

public class Main {
  private static final String TAG = "Util";

  public static Size getOptimalVideoSnapshotPictureSize(List<Size> sizes, double targetRatio) {
    // Use a very small tolerance because we want an exact match.
    final double ASPECT_TOLERANCE = 0.001;
    if (sizes == null)
      return null;

    Size optimalSize = null;

    // Try to find a size matches aspect ratio and has the largest width
    for (Size size : sizes) {
      double ratio = (double) size.width / size.height;
      if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
        continue;
      if (optimalSize == null || size.width > optimalSize.width) {
        optimalSize = size;
      }
    }

    // Cannot find one that matches the aspect ratio. This should not happen.
    // Ignore the requirement.
    if (optimalSize == null) {
      Log.w(TAG, "No picture size match the aspect ratio");
      for (Size size : sizes) {
        if (optimalSize == null || size.width > optimalSize.width) {
          optimalSize = size;
        }
      }
    }
    return optimalSize;
  }
}

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