/*
* Copyright 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
package org.webrtc;
import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Rect;
import android.graphics.SurfaceTexture;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CameraMetadata;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.os.Build;
import android.os.SystemClock;
import android.util.AndroidException;
import android.util.Range;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@TargetApi(21)
public class Camera2Enumerator implements CameraEnumerator {
private final static String TAG = "Camera2Enumerator";
private final static double NANO_SECONDS_PER_SECOND = 1.0e9;
// Each entry contains the supported formats for a given camera index. The formats are enumerated
// lazily in getSupportedFormats(), and cached for future reference.
private static final Map<String, List<CaptureFormat>> cachedSupportedFormats =
new HashMap<String, List<CaptureFormat>>();
final Context context;
final CameraManager cameraManager;
public Camera2Enumerator(Context context) {
this.context = context;
this.cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
}
@Override
public String[] getDeviceNames() {
try {
return cameraManager.getCameraIdList();
// On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
// catch statement with an Exception from a newer API, even if the code is never executed.
// https://code.google.com/p/android/issues/detail?id=209129
} catch (/* CameraAccessException */ AndroidException e) {
Logging.e(TAG, "Camera access exception: " + e);
return new String[] {};
}
}
@Override
public boolean isFrontFacing(String deviceName) {
CameraCharacteristics characteristics = getCameraCharacteristics(deviceName);
return characteristics != null
&& characteristics.get(CameraCharacteristics.LENS_FACING)
== CameraMetadata.LENS_FACING_FRONT;
}
@Override
public boolean isBackFacing(String deviceName) {
CameraCharacteristics characteristics = getCameraCharacteristics(deviceName);
return characteristics != null
&& characteristics.get(CameraCharacteristics.LENS_FACING)
== CameraMetadata.LENS_FACING_BACK;
}
@Override
public List<CaptureFormat> getSupportedFormats(String deviceName) {
return getSupportedFormats(context, deviceName);
}
@Override
public CameraVideoCapturer createCapturer(
String deviceName, CameraVideoCapturer.CameraEventsHandler eventsHandler) {
return new Camera2Capturer(context, deviceName, eventsHandler);
}
private CameraCharacteristics getCameraCharacteristics(String deviceName) {
try {
return cameraManager.getCameraCharacteristics(deviceName);
// On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
// catch statement with an Exception from a newer API, even if the code is never executed.
// https://code.google.com/p/android/issues/detail?id=209129
} catch (/* CameraAccessException */ AndroidException e) {
Logging.e(TAG, "Camera access exception: " + e);
return null;
}
}
/**
* Checks if API is supported and all cameras have better than legacy support.
*/
public static boolean isSupported(Context context) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
return false;
}
CameraManager cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
try {
String[] cameraIds = cameraManager.getCameraIdList();
for (String id : cameraIds) {
CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(id);
if (characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL)
== CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY) {
return false;
}
}
// On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
// catch statement with an Exception from a newer API, even if the code is never executed.
// https://code.google.com/p/android/issues/detail?id=209129
} catch (/* CameraAccessException */ AndroidException e) {
Logging.e(TAG, "Camera access exception: " + e);
return false;
}
return true;
}
static int getFpsUnitFactor(Range<Integer>[] fpsRanges) {
if (fpsRanges.length == 0) {
return 1000;
}
return fpsRanges[0].getUpper() < 1000 ? 1000 : 1;
}
static List<Size> getSupportedSizes(CameraCharacteristics cameraCharacteristics) {
final StreamConfigurationMap streamMap =
cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
final int supportLevel =
cameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);
final android.util.Size[] nativeSizes = streamMap.getOutputSizes(SurfaceTexture.class);
final List<Size> sizes = convertSizes(nativeSizes);
// Video may be stretched pre LMR1 on legacy implementations.
// Filter out formats that have different aspect ratio than the sensor array.
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP_MR1
&& supportLevel == CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY) {
final Rect activeArraySize =
cameraCharacteristics.get(CameraCharacteristics.SENSOR_INFO_ACTIVE_ARRAY_SIZE);
final ArrayList<Size> filteredSizes = new ArrayList<Size>();
for (Size size : sizes) {
if (activeArraySize.width() * size.height == activeArraySize.height() * size.width) {
filteredSizes.add(size);
}
}
return filteredSizes;
} else {
return sizes;
}
}
static List<CaptureFormat> getSupportedFormats(Context context, String cameraId) {
return getSupportedFormats(
(CameraManager) context.getSystemService(Context.CAMERA_SERVICE), cameraId);
}
static List<CaptureFormat> getSupportedFormats(CameraManager cameraManager, String 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(cameraId);
} catch (Exception ex) {
Logging.e(TAG, "getCameraCharacteristics(): " + ex);
return new ArrayList<CaptureFormat>();
}
final StreamConfigurationMap streamMap =
cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
Range<Integer>[] fpsRanges =
cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES);
List<CaptureFormat.FramerateRange> framerateRanges =
convertFramerates(fpsRanges, getFpsUnitFactor(fpsRanges));
List<Size> sizes = getSupportedSizes(cameraCharacteristics);
int defaultMaxFps = 0;
for (CaptureFormat.FramerateRange framerateRange : framerateRanges) {
defaultMaxFps = Math.max(defaultMaxFps, framerateRange.max);
}
final List<CaptureFormat> formatList = new ArrayList<CaptureFormat>();
for (Size size : sizes) {
long minFrameDurationNs = 0;
try {
minFrameDurationNs = streamMap.getOutputMinFrameDuration(
SurfaceTexture.class, new android.util.Size(size.width, size.height));
} 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) * 1000;
formatList.add(new CaptureFormat(size.width, size.height, 0, maxFps));
Logging.d(TAG, "Format: " + size.width + "x" + size.height + "@" + maxFps);
}
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;
}
}
// Convert from android.util.Size to Size.
private static List<Size> convertSizes(android.util.Size[] cameraSizes) {
final List<Size> sizes = new ArrayList<Size>();
for (android.util.Size size : cameraSizes) {
sizes.add(new Size(size.getWidth(), size.getHeight()));
}
return sizes;
}
// Convert from android.util.Range<Integer> to CaptureFormat.FramerateRange.
static List<CaptureFormat.FramerateRange> convertFramerates(
Range<Integer>[] arrayRanges, int unitFactor) {
final List<CaptureFormat.FramerateRange> ranges = new ArrayList<CaptureFormat.FramerateRange>();
for (Range<Integer> range : arrayRanges) {
ranges.add(new CaptureFormat.FramerateRange(
range.getLower() * unitFactor, range.getUpper() * unitFactor));
}
return ranges;
}
}
