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      1 /*
      2  * libjingle
      3  * Copyright 2015 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 package org.webrtc;
     29 
     30 import android.os.SystemClock;
     31 
     32 import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
     33 import org.webrtc.Logging;
     34 
     35 import java.util.ArrayList;
     36 import java.util.List;
     37 
     38 @SuppressWarnings("deprecation")
     39 public class CameraEnumerator implements CameraEnumerationAndroid.Enumerator {
     40   private final static String TAG = "CameraEnumerator";
     41   // Each entry contains the supported formats for corresponding camera index. The formats for all
     42   // cameras are enumerated on the first call to getSupportedFormats(), and cached for future
     43   // reference.
     44   private List<List<CaptureFormat>> cachedSupportedFormats;
     45 
     46   @Override
     47   public List<CaptureFormat> getSupportedFormats(int cameraId) {
     48     synchronized (this) {
     49       if (cachedSupportedFormats == null) {
     50         cachedSupportedFormats = new ArrayList<List<CaptureFormat>>();
     51         for (int i = 0; i < CameraEnumerationAndroid.getDeviceCount(); ++i) {
     52           cachedSupportedFormats.add(enumerateFormats(i));
     53         }
     54       }
     55     }
     56     return cachedSupportedFormats.get(cameraId);
     57   }
     58 
     59   private List<CaptureFormat> enumerateFormats(int cameraId) {
     60     Logging.d(TAG, "Get supported formats for camera index " + cameraId + ".");
     61     final long startTimeMs = SystemClock.elapsedRealtime();
     62     final android.hardware.Camera.Parameters parameters;
     63     android.hardware.Camera camera = null;
     64     try {
     65       Logging.d(TAG, "Opening camera with index " + cameraId);
     66       camera = android.hardware.Camera.open(cameraId);
     67       parameters = camera.getParameters();
     68     } catch (RuntimeException e) {
     69       Logging.e(TAG, "Open camera failed on camera index " + cameraId, e);
     70       return new ArrayList<CaptureFormat>();
     71     } finally {
     72       if (camera != null) {
     73         camera.release();
     74       }
     75     }
     76 
     77     final List<CaptureFormat> formatList = new ArrayList<CaptureFormat>();
     78     try {
     79       int minFps = 0;
     80       int maxFps = 0;
     81       final List<int[]> listFpsRange = parameters.getSupportedPreviewFpsRange();
     82       if (listFpsRange != null) {
     83         // getSupportedPreviewFpsRange() returns a sorted list. Take the fps range
     84         // corresponding to the highest fps.
     85         final int[] range = listFpsRange.get(listFpsRange.size() - 1);
     86         minFps = range[android.hardware.Camera.Parameters.PREVIEW_FPS_MIN_INDEX];
     87         maxFps = range[android.hardware.Camera.Parameters.PREVIEW_FPS_MAX_INDEX];
     88       }
     89       for (android.hardware.Camera.Size size : parameters.getSupportedPreviewSizes()) {
     90         formatList.add(new CaptureFormat(size.width, size.height, minFps, maxFps));
     91       }
     92     } catch (Exception e) {
     93       Logging.e(TAG, "getSupportedFormats() failed on camera index " + cameraId, e);
     94     }
     95 
     96     final long endTimeMs = SystemClock.elapsedRealtime();
     97     Logging.d(TAG, "Get supported formats for camera index " + cameraId + " done."
     98         + " Time spent: " + (endTimeMs - startTimeMs) + " ms.");
     99     return formatList;
    100   }
    101 }
    102