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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
package org.qtproject.qt.android.multimedia;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.ImageFormat;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CaptureFailure;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.TotalCaptureResult;
import android.media.Image;
import android.media.ImageReader;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import java.util.List;
@TargetApi(23)
public class QtCamera2 {
CameraDevice mCameraDevice = null;
HandlerThread mBackgroundThread;
Handler mBackgroundHandler;
ImageReader mImageReader;
CameraManager mCameraManager;
CameraCaptureSession mCaptureSession;
CaptureRequest.Builder mPreviewRequestBuilder;
CaptureRequest mPreviewRequest;
String mCameraId;
native void onFrameAvailable(String cameraId, Image image);
ImageReader.OnImageAvailableListener mOnImageAvailableListener = new ImageReader.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader reader) {
QtCamera2.this.onFrameAvailable(mCameraId, reader.acquireLatestImage());
}
};
native void onCameraOpened(String cameraId);
native void onCameraDisconnect(String cameraId);
native void onCameraError(String cameraId, int error);
CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice cameraDevice) {
if (mCameraDevice != null)
mCameraDevice.close();
mCameraDevice = cameraDevice;
onCameraOpened(mCameraId);
}
@Override
public void onDisconnected(CameraDevice cameraDevice) {
cameraDevice.close();
if (mCameraDevice == cameraDevice)
mCameraDevice = null;
onCameraDisconnect(mCameraId);
}
@Override
public void onError(CameraDevice cameraDevice, int error) {
cameraDevice.close();
if (mCameraDevice == cameraDevice)
mCameraDevice = null;
onCameraError(mCameraId, error);
}
};
native void onCaptureSessionConfigured(String cameraId);
native void onCaptureSessionConfigureFailed(String cameraId);
CameraCaptureSession.StateCallback mCaptureStateCallback = new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(CameraCaptureSession cameraCaptureSession) {
mCaptureSession = cameraCaptureSession;
onCaptureSessionConfigured(mCameraId);
}
@Override
public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
onCaptureSessionConfigureFailed(mCameraId);
}
@Override
public void onActive(CameraCaptureSession cameraCaptureSession) {
super.onActive(cameraCaptureSession);
onSessionActive(mCameraId);
}
@Override
public void onClosed(CameraCaptureSession cameraCaptureSession) {
super.onClosed(cameraCaptureSession);
onSessionClosed(mCameraId);
}
};
native void onSessionActive(String cameraId);
native void onSessionClosed(String cameraId);
native void onCaptureSessionFailed(String cameraId, int reason, long frameNumber);
CameraCaptureSession.CaptureCallback mCaptureCallback = new CameraCaptureSession.CaptureCallback() {
public void onCaptureFailed(CameraCaptureSession session, CaptureRequest request, CaptureFailure failure) {
super.onCaptureFailed(session, request, failure);
onCaptureSessionFailed(mCameraId, failure.getReason(), failure.getFrameNumber());
}
};
public QtCamera2(Context context) {
mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
startBackgroundThread();
}
void startBackgroundThread() {
mBackgroundThread = new HandlerThread("CameraBackground");
mBackgroundThread.start();
mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}
void stopBackgroundThread() {
mBackgroundThread.quitSafely();
try {
mBackgroundThread.join();
mBackgroundThread = null;
mBackgroundHandler = null;
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean open(String cameraId, int width, int height) {
try {
mImageReader = ImageReader.newInstance(width, height, ImageFormat.JPEG, /*maxImages*/10);
mImageReader.setOnImageAvailableListener(mOnImageAvailableListener, mBackgroundHandler);
mCameraId = cameraId;
mCameraManager.openCamera(cameraId,mStateCallback,mBackgroundHandler);
return true;
} catch (Exception e){
Log.w("QtCamera2", "Failed to open camera:" + e);
}
return false;
}
public boolean createSession() {
if (mCameraDevice == null)
return false;
try {
mCameraDevice.createCaptureSession(List.of(mImageReader.getSurface()), mCaptureStateCallback, mBackgroundHandler);
return true;
} catch (Exception exception) {
Log.w("QtCamera2", "Failed to create a capture session:" + exception);
}
return false;
}
public boolean start(int template) {
if (mCameraDevice == null)
return false;
if (mCaptureSession == null)
return false;
try {
mPreviewRequestBuilder = mCameraDevice.createCaptureRequest(template);
mPreviewRequestBuilder.addTarget(mImageReader.getSurface());
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
mPreviewRequest = mPreviewRequestBuilder.build();
mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback, mBackgroundHandler);
return true;
} catch (Exception exception) {
Log.w("QtCamera2", "Failed to start preview:" + exception);
}
return false;
}
public void stopAndClose() {
try {
if (null != mCaptureSession) {
mCaptureSession.close();
mCaptureSession = null;
}
if (null != mCameraDevice) {
mCameraDevice.close();
mCameraDevice = null;
}
if (null != mImageReader) {
mImageReader.close();
mImageReader = null;
}
mCameraId = "";
} catch (Exception exception) {
Log.w("QtCamera2", "Failed to stop and close:" + exception);
}
}
}
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