Example usage for android.hardware Camera setPreviewCallbackWithBuffer

Introduction

In this page you can find the example usage for android.hardware Camera setPreviewCallbackWithBuffer.

Prototype

public final void setPreviewCallbackWithBuffer(PreviewCallback cb) 

Source Link

Document

Installs a callback to be invoked for every preview frame, using buffers supplied with #addCallbackBuffer(byte[]) , in addition to displaying them on the screen.

Usage

From source file:uk.ac.horizon.artcodes.camera.CameraView.java

public void setDetector(Detector processor, Experience experience) {
    this.experience = experience;
    this.detector = processor;
    if (detector != null) {
        if (camera == null) {
            createCamera();//w w w  .  j  a  va 2  s.c  o  m
        }
        if (camera != null) {
            cameraIsFocused = !deviceNeedsTapToFocus;
            camera.addCallbackBuffer(detector.createBuffer(info, surfaceWidth, surfaceHeight));
            camera.setPreviewCallbackWithBuffer(new Camera.PreviewCallback() {
                @Override
                public void onPreviewFrame(final byte[] data, final Camera camera) {

                    boolean focusedOnThisFrame = false;

                    if (deviceNeedsTapToFocus || !cameraIsFocused) {
                        synchronized (cameraFocusLock) {
                            while (!cameraIsFocused) {
                                try {
                                    Log.i("FOCUS", "cameraFocusLock.wait(); Thread: "
                                            + Thread.currentThread().getName());
                                    focusedOnThisFrame = true;
                                    cameraFocusLock.wait();
                                } catch (InterruptedException ignored) {
                                }
                            }
                            Log.i("FOCUS", "notified Thread: " + Thread.currentThread().getName());
                        }
                    }

                    if (cameraIsFocused) {
                        Log.i("FOCUS", "cameraIsFocused test: " + cameraIsFocused);
                        if (!focusedOnThisFrame) {
                            detector.setData(data);
                        }
                        camera.addCallbackBuffer(data);
                    }
                }
            });
        }

        if (Camera.getNumberOfCameras() > 1) {
            detector.getSettings().add(new DetectorSetting() {
                @Override
                public void nextValue() {
                    stopCamera();
                    facing = 1 - facing;
                    startCamera();
                }

                @Override
                public int getIcon() {
                    switch (facing) {
                    case Camera.CameraInfo.CAMERA_FACING_BACK:
                        return R.drawable.ic_camera_rear_24dp;
                    case Camera.CameraInfo.CAMERA_FACING_FRONT:
                        return R.drawable.ic_camera_front_24dp;
                    }
                    return 0;
                }

                @Override
                public int getText() {
                    switch (facing) {
                    case Camera.CameraInfo.CAMERA_FACING_BACK:
                        return R.string.camera_rear;
                    case Camera.CameraInfo.CAMERA_FACING_FRONT:
                        return R.string.camera_front;
                    }

                    return 0;
                }
            });
        }
    }
}

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From source file:com.nekomeshi312.whiteboardcorrection.CameraViewFragment.java

public void stopPreview() {
    // TODO Auto-generated method stub
    Log.i(LOG_TAG, "stopPreview");
    if (mCameraSetting == null)
        return;/*from   w ww .j  a v a2 s  .  com*/
    try {
        if (mCameraSetting.getCamera() != null) {
            final Camera camera = mCameraSetting.getCamera();
            camera.setPreviewCallbackWithBuffer(null);
            mBuffer = null;
            camera.stopPreview();
            if (mWbDetect != null) {
                mWbDetect = null;
            }
            if (mLineDetector != null) {
                mLineDetector.cleanUp();
                mLineDetector = null;
            }

            if (mMatYuv != null) {
                mMatYuv.release();
                mMatYuv = null;
            }
            if (mMatRgba != null) {
                mMatRgba.release();
                mMatRgba = null;
            }
            if (mBmp != null) {
                mBmp.recycle();
                mBmp = null;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:com.nekomeshi312.whiteboardcorrection.CameraViewFragment.java

private void setPreviewCallback() {
    if (!mCameraSetting.isCameraOpen())
        return;/*  ww w  . ja v  a  2  s  .com*/

    final Camera camera = mCameraSetting.getCamera();
    //?? bit/pixel
    PixelFormat pixelinfo = new PixelFormat();
    int pixelformat = camera.getParameters().getPreviewFormat();
    PixelFormat.getPixelFormatInfo(pixelformat, pixelinfo);
    //???
    Camera.Parameters parameters = camera.getParameters();
    Size sz = parameters.getPreviewSize();
    //??????
    int bufSize = sz.width * sz.height * pixelinfo.bitsPerPixel / 8;
    mBuffer = new byte[bufSize];
    camera.addCallbackBuffer(mBuffer);
    camera.setPreviewCallbackWithBuffer(this);
}

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