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/*
* libjingle
* Copyright 2015 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.webrtc;
import android.hardware.Camera;
import android.os.SystemClock;
import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
import org.webrtc.Logging;
import java.util.ArrayList;
import java.util.List;
@SuppressWarnings("deprecation")
public class CameraEnumerator implements CameraEnumerationAndroid.Enumerator {
private final static String TAG = "CameraEnumerator";
// Each entry contains the supported formats for corresponding camera index. The formats for all
// cameras are enumerated on the first call to getSupportedFormats(), and cached for future
// reference.
private List<List<CaptureFormat>> cachedSupportedFormats;
@Override
public List<CaptureFormat> getSupportedFormats(int cameraId) {
synchronized (this) {
if (cachedSupportedFormats == null) {
cachedSupportedFormats = new ArrayList<List<CaptureFormat>>();
for (int i = 0; i < CameraEnumerationAndroid.getDeviceCount(); ++i) {
cachedSupportedFormats.add(enumerateFormats(i));
}
}
}
return cachedSupportedFormats.get(cameraId);
}
private List<CaptureFormat> enumerateFormats(int cameraId) {
Logging.d(TAG, "Get supported formats for camera index " + cameraId + ".");
final long startTimeMs = SystemClock.elapsedRealtime();
final Camera.Parameters parameters;
Camera camera = null;
try {
Logging.d(TAG, "Opening camera with index " + cameraId);
camera = Camera.open(cameraId);
parameters = camera.getParameters();
} catch (RuntimeException e) {
Logging.e(TAG, "Open camera failed on camera index " + cameraId, e);
return new ArrayList<CaptureFormat>();
} finally {
if (camera != null) {
camera.release();
}
}
final List<CaptureFormat> formatList = new ArrayList<CaptureFormat>();
try {
int minFps = 0;
int maxFps = 0;
final List<int[]> listFpsRange = parameters.getSupportedPreviewFpsRange();
if (listFpsRange != null) {
// getSupportedPreviewFpsRange() returns a sorted list. Take the fps range
// corresponding to the highest fps.
final int[] range = listFpsRange.get(listFpsRange.size() - 1);
minFps = range[Camera.Parameters.PREVIEW_FPS_MIN_INDEX];
maxFps = range[Camera.Parameters.PREVIEW_FPS_MAX_INDEX];
}
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
formatList.add(new CaptureFormat(size.width, size.height, minFps, maxFps));
}
} catch (Exception e) {
Logging.e(TAG, "getSupportedFormats() failed on camera index " + cameraId, e);
}
final long endTimeMs = SystemClock.elapsedRealtime();
Logging.d(TAG, "Get supported formats for camera index " + cameraId + " done."
+ " Time spent: " + (endTimeMs - startTimeMs) + " ms.");
return formatList;
}
}
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