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/*
* 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 android.os.SystemClock;
import androidx.annotation.Nullable;
import java.util.ArrayList;
import java.util.List;
import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
@SuppressWarnings("deprecation")
public class Camera1Enumerator implements CameraEnumerator {
private final static String TAG = "Camera1Enumerator";
// 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 static List<List<CaptureFormat>> cachedSupportedFormats;
private final boolean captureToTexture;
public Camera1Enumerator() {
this(true /* captureToTexture */);
}
public Camera1Enumerator(boolean captureToTexture) {
this.captureToTexture = captureToTexture;
}
// Returns device names that can be used to create a new VideoCapturerAndroid.
@Override
public String[] getDeviceNames() {
ArrayList<String> namesList = new ArrayList<>();
for (int i = 0; i < android.hardware.Camera.getNumberOfCameras(); ++i) {
String name = getDeviceName(i);
if (name != null) {
namesList.add(name);
Logging.d(TAG, "Index: " + i + ". " + name);
} else {
Logging.e(TAG, "Index: " + i + ". Failed to query camera name.");
}
}
String[] namesArray = new String[namesList.size()];
return namesList.toArray(namesArray);
}
@Override
public boolean isFrontFacing(String deviceName) {
android.hardware.Camera.CameraInfo info = getCameraInfo(getCameraIndex(deviceName));
return info != null && info.facing == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT;
}
@Override
public boolean isBackFacing(String deviceName) {
android.hardware.Camera.CameraInfo info = getCameraInfo(getCameraIndex(deviceName));
return info != null && info.facing == android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK;
}
@Override
public boolean isInfrared(String deviceName) {
return false;
}
@Override
public List<CaptureFormat> getSupportedFormats(String deviceName) {
return getSupportedFormats(getCameraIndex(deviceName));
}
@Override
public CameraVideoCapturer createCapturer(
String deviceName, CameraVideoCapturer.CameraEventsHandler eventsHandler) {
return new Camera1Capturer(deviceName, eventsHandler, captureToTexture);
}
private static @Nullable android.hardware.Camera.CameraInfo getCameraInfo(int index) {
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
try {
android.hardware.Camera.getCameraInfo(index, info);
} catch (Exception e) {
Logging.e(TAG, "getCameraInfo failed on index " + index, e);
return null;
}
return info;
}
static synchronized List<CaptureFormat> getSupportedFormats(int cameraId) {
if (cachedSupportedFormats == null) {
cachedSupportedFormats = new ArrayList<List<CaptureFormat>>();
for (int i = 0; i < android.hardware.Camera.getNumberOfCameras(); ++i) {
cachedSupportedFormats.add(enumerateFormats(i));
}
}
return cachedSupportedFormats.get(cameraId);
}
private static List<CaptureFormat> enumerateFormats(int cameraId) {
Logging.d(TAG, "Get supported formats for camera index " + cameraId + ".");
final long startTimeMs = SystemClock.elapsedRealtime();
final android.hardware.Camera.Parameters parameters;
android.hardware.Camera camera = null;
try {
Logging.d(TAG, "Opening camera with index " + cameraId);
camera = android.hardware.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[android.hardware.Camera.Parameters.PREVIEW_FPS_MIN_INDEX];
maxFps = range[android.hardware.Camera.Parameters.PREVIEW_FPS_MAX_INDEX];
}
for (android.hardware.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;
}
// Convert from android.hardware.Camera.Size to Size.
static List<Size> convertSizes(List<android.hardware.Camera.Size> cameraSizes) {
final List<Size> sizes = new ArrayList<Size>();
for (android.hardware.Camera.Size size : cameraSizes) {
sizes.add(new Size(size.width, size.height));
}
return sizes;
}
// Convert from int[2] to CaptureFormat.FramerateRange.
static List<CaptureFormat.FramerateRange> convertFramerates(List<int[]> arrayRanges) {
final List<CaptureFormat.FramerateRange> ranges = new ArrayList<CaptureFormat.FramerateRange>();
for (int[] range : arrayRanges) {
ranges.add(new CaptureFormat.FramerateRange(
range[android.hardware.Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
range[android.hardware.Camera.Parameters.PREVIEW_FPS_MAX_INDEX]));
}
return ranges;
}
// Returns the camera index for camera with name `deviceName`, or throws IllegalArgumentException
// if no such camera can be found.
static int getCameraIndex(String deviceName) {
Logging.d(TAG, "getCameraIndex: " + deviceName);
for (int i = 0; i < android.hardware.Camera.getNumberOfCameras(); ++i) {
if (deviceName.equals(getDeviceName(i))) {
return i;
}
}
throw new IllegalArgumentException("No such camera: " + deviceName);
}
// Returns the name of the camera with camera index. Returns null if the
// camera can not be used.
static @Nullable String getDeviceName(int index) {
android.hardware.Camera.CameraInfo info = getCameraInfo(index);
if (info == null) {
return null;
}
String facing =
(info.facing == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT) ? "front" : "back";
return "Camera " + index + ", Facing " + facing + ", Orientation " + info.orientation;
}
}