CameraEngine.java 文件源码

public void openCamera(boolean facingFront) {
    synchronized (this) {
        int facing=facingFront? Camera.CameraInfo.CAMERA_FACING_FRONT:Camera.CameraInfo.CAMERA_FACING_BACK;
        currentCameraId=getCameraIdWithFacing(facing);
        camera = Camera.open(currentCameraId);
        camera.setPreviewCallbackWithBuffer(this);
        initRotateDegree(currentCameraId);
        if (camera != null) {
            mParams = camera.getParameters();
            List<Camera.Size> supportedPictureSizesList=mParams.getSupportedPictureSizes();
            List<Camera.Size> supportedVideoSizesList=mParams.getSupportedVideoSizes();
            List<Camera.Size> supportedPreviewSizesList=mParams.getSupportedPreviewSizes();
            Logger.logCameraSizes(supportedPictureSizesList);
            Logger.logCameraSizes(supportedVideoSizesList);
            Logger.logCameraSizes(supportedPreviewSizesList);

            previewSize=choosePreferredSize(supportedPreviewSizesList,preferredRatio);
            Camera.Size photoSize=choosePreferredSize(supportedPictureSizesList,preferredRatio);

            frameHeight=previewSize.width;
            frameWidth=previewSize.height;
            Log.d(TAG, "openCamera: choose preview size"+previewSize.height+"x"+previewSize.width);
            mParams.setPreviewSize(frameHeight,frameWidth);

            mParams.setPictureSize(photoSize.width,photoSize.height);
            Log.d(TAG, "openCamera: choose photo size"+photoSize.height+"x"+photoSize.width);

            //mParams.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
            int size = frameWidth*frameHeight;
            size = size * ImageFormat.getBitsPerPixel(mParams.getPreviewFormat()) / 8;
            if (mBuffer==null || mBuffer.length!=size)
                mBuffer = new byte[size];
            mFrameChain[0].init(size);
            mFrameChain[1].init(size);
            camera.addCallbackBuffer(mBuffer);
            camera.setParameters(mParams);
            cameraOpened=true;
        }
    }
}