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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.content.Context;
import android.graphics.ImageFormat;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.os.Build;
import android.os.SystemClock;
import android.util.Range;
import android.util.Size;
import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
import org.webrtc.Logging;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Camera2Enumerator implements CameraEnumerationAndroid.Enumerator {
private final static String TAG = "Camera2Enumerator";
private final static double NANO_SECONDS_PER_SECOND = 1.0e9;
private final CameraManager cameraManager;
// Each entry contains the supported formats for a given camera index. The formats are enumerated
// lazily in getSupportedFormats(), and cached for future reference.
private final Map<Integer, List<CaptureFormat>> cachedSupportedFormats =
new HashMap<Integer, List<CaptureFormat>>();
public static boolean isSupported() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
}
public Camera2Enumerator(Context context) {
cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
}
@Override
public List<CaptureFormat> getSupportedFormats(int cameraId) {
synchronized (cachedSupportedFormats) {
if (cachedSupportedFormats.containsKey(cameraId)) {
return cachedSupportedFormats.get(cameraId);
}
Logging.d(TAG, "Get supported formats for camera index " + cameraId + ".");
final long startTimeMs = SystemClock.elapsedRealtime();
final CameraCharacteristics cameraCharacteristics;
try {
cameraCharacteristics = cameraManager.getCameraCharacteristics(Integer.toString(cameraId));
} catch (Exception ex) {
Logging.e(TAG, "getCameraCharacteristics(): " + ex);
return new ArrayList<CaptureFormat>();
}
// Calculate default max fps from auto-exposure ranges in case getOutputMinFrameDuration() is
// not supported.
final Range<Integer>[] fpsRanges =
cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES);
int defaultMaxFps = 0;
for (Range<Integer> fpsRange : fpsRanges) {
defaultMaxFps = Math.max(defaultMaxFps, fpsRange.getUpper());
}
final StreamConfigurationMap streamMap =
cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
final Size[] sizes = streamMap.getOutputSizes(ImageFormat.YUV_420_888);
if (sizes == null) {
throw new RuntimeException("ImageFormat.YUV_420_888 not supported.");
}
final List<CaptureFormat> formatList = new ArrayList<CaptureFormat>();
for (Size size : sizes) {
long minFrameDurationNs = 0;
try {
minFrameDurationNs = streamMap.getOutputMinFrameDuration(ImageFormat.YUV_420_888, size);
} catch (Exception e) {
// getOutputMinFrameDuration() is not supported on all devices. Ignore silently.
}
final int maxFps = (minFrameDurationNs == 0)
? defaultMaxFps
: (int) Math.round(NANO_SECONDS_PER_SECOND / minFrameDurationNs);
formatList.add(new CaptureFormat(size.getWidth(), size.getHeight(), 0, maxFps * 1000));
}
cachedSupportedFormats.put(cameraId, formatList);
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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