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 getSupportedFormats(int cameraId)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 enumerateFormats(int cameraId)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