毕业设计 C++视频创作平台.zip

package com.lifengqiang.video.camera; import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.graphics.ImageFormat; import android.hardware.camera2.CameraAccessException; import android.hardware.camera2.CameraCaptureSession; import android.hardware.camera2.CameraCharacteristics; import android.hardware.camera2.CameraDevice; import android.hardware.camera2.CameraManager; import android.hardware.camera2.CaptureRequest; import android.hardware.camera2.params.StreamConfigurationMap; import android.media.Image; import android.media.ImageReader; import android.os.Handler; import android.os.HandlerThread; import android.util.Log; import android.util.Size; import android.view.Surface; import androidx.annotation.NonNull; import androidx.core.content.ContextCompat; import java.util.Arrays; public class Camera2Wrapper { private final String TAG = "Camera2Wrapper"; private final Size DEFAULT_PREVIEW_SIZE = new Size(1920, 1080); private final Size DEFAULT_CAPTURE_SIZE = new Size(1920, 1080); private final Context mContext; private final CameraManager mCameraManager; private CameraDevice mCameraDevice; private CameraCaptureSession mCameraCaptureSession; private String mCameraId, mFrontCameraId, mBackCameraId; private Size mPreviewSize, mPictureSize; private ImageReader mPreviewImageReader, mCaptureImageReader; private int mSensorOrientation; private Surface mPreviewSurface; private Handler mBackgroundHandler; private HandlerThread mBackgroundThread; private FrameCallback mFrameCallback; public Camera2Wrapper(Context context) { mContext = context; mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); mFrameCallback = (FrameCallback) context; initCamera(); useBackCamera(); } private ImageReader.OnImageAvailableListener mOnPreviewImageAvailableListener = reader -> { Image image = reader.acquireLatestImage(); if (image != null) { if (mFrameCallback != null) { mFrameCallback.onVideoFrame(image); } image.close(); } }; private ImageReader.OnImageAvailableListener mOnCaptureImageAvailableListener = reader -> { Image image = reader.acquireLatestImage(); if (image != null) { if (mFrameCallback != null) { mFrameCallback.onImageFrame(image); } image.close(); } }; private void initCamera() { try { String[] cameraIdList = mCameraManager.getCameraIdList(); for (String cameraId : cameraIdList) { CameraCharacteristics characteristics = mCameraManager.getCameraCharacteristics(cameraId); Integer orientation = characteristics.get(CameraCharacteristics.LENS_FACING); if (orientation == null) continue; if (orientation == CameraCharacteristics.LENS_FACING_FRONT) { mFrontCameraId = cameraId; } else if (orientation == CameraCharacteristics.LENS_FACING_BACK) { mBackCameraId = cameraId; } } } catch (CameraAccessException e) { e.printStackTrace(); } } private boolean getCameraSizeParameter() { try { CameraCharacteristics characteristics = mCameraManager.getCameraCharacteristics(mCameraId); mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION); StreamConfigurationMap streamConfigs = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); Size[] sizes = streamConfigs.getOutputSizes(ImageReader.class); mPreviewSize = null; mPictureSize = null; for (Size size : sizes) { if (size.equals(DEFAULT_PREVIEW_SIZE)) { mPreviewSize = new Size(size.getWidth(), size.getHeight()); } if (size.equals(DEFAULT_CAPTURE_SIZE)) { mPictureSize = new Size(size.getWidth(), size.getHeight()); } } return mPreviewSize != null && mPictureSize != null; } catch (Exception e) { e.printStackTrace(); return false; } } public void useBackCamera() { mCameraId = mBackCameraId; } public void useFrontCamera() { mCameraId = mFrontCameraId; } public void toggleCamera() { if (mCameraId == null) { mCameraId = mBackCameraId; } else if (mCameraId.equals(mBackCameraId)) { mCameraId = mFrontCameraId; } else if (mCameraId.equals(mFrontCameraId)) { mCameraId = mBackCameraId; } } public void startCamera() { stopCamera(); if (getCameraSizeParameter()) { startBackgroundThread(); if (mPreviewImageReader == null && mPreviewSize != null) { mPreviewImageReader = ImageReader.newInstance(mPreviewSize.getWidth(), mPreviewSize.getHeight(), ImageFormat.YUV_420_888, 2); mPreviewImageReader.setOnImageAvailableListener(mOnPreviewImageAvailableListener, mBackgroundHandler); mPreviewSurface = mPreviewImageReader.getSurface(); } if (mCaptureImageReader == null && mPictureSize != null) { mCaptureImageReader = ImageReader.newInstance(mPictureSize.getWidth(), mPictureSize.getHeight(), ImageFormat.YUV_420_888, 2); mCaptureImageReader.setOnImageAvailableListener(mOnCaptureImageAvailableListener, mBackgroundHandler); } openCamera(); } else { if (mFrameCallback != null) { mFrameCallback.onShowToast("此相机不具有合适的预览尺寸"); } } } public void stopCamera() { if (mPreviewImageReader != null) { mPreviewImageReader.setOnImageAvailableListener(null, null); } if (mCaptureImageReader != null) { mCaptureImageReader.setOnImageAvailableListener(null, null); } closeCamera(); stopBackgroundThread(); } private void openCamera() { if (ContextCompat.checkSelfPermission(mContext, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } try { mCameraManager.openCamera(mCameraId, mStateCallback, mBackgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } public void closeCamera() { if (null != mCameraCaptureSession) { mCameraCaptureSession.close(); mCameraCaptureSession = null; } if (null != mCameraDevice) { mCameraDevice.close(); mCameraDevice = null; } if (null != mPreviewImageReader) { mPreviewImageReader.close(); mPreviewImageReader = null; } if (null != mCaptureImageReader) { mCaptureImageReader.close(); mCaptureImageReader = null; } } private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(@NonNull CameraDevice cameraDevice) { // This method is called when the camera is opened. We start camera preview here. mCameraDevice = cameraDevice; createCaptureSession(); } @Override public void onDisconnected(@NonNull CameraDevice cameraDevice) { cameraDevice.close(); mCameraDevice = null; } @Override public void onError(@NonNull CameraDevice cameraDevice, int error) { cameraDevice.close(); mCameraDevice = null; } };