Example usage for android.hardware.camera2 CameraMetadata CONTROL_AF_TRIGGER

Introduction

In this page you can find the example usage for android.hardware.camera2 CameraMetadata CONTROL_AF_TRIGGER_START.

Prototype

int CONTROL_AF_TRIGGER_START

To view the source code for android.hardware.camera2 CameraMetadata CONTROL_AF_TRIGGER_START.

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Document

Autofocus will trigger now.

Usage

From source file:com.visualnavigate.CameraFragment.java

/**
 * Lock the focus as the first step for a still image capture.
 *//* w  w w.  j a  v a  2s .c o  m*/
private void lockFocus() {
    try {
        // This is how to tell the camera to lock focus.
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START);

        // Tell #mCaptureCallback to wait for the lock.
        mState = STATE_WAITING_LOCK;

        List<CaptureRequest> list = new ArrayList<CaptureRequest>();
        list.add(mPreviewRequestBuilder.build());

        mCaptureSession.captureBurst(list, mCaptureCallback, mBackgroundHandler);

    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

From source file:com.mgtv.qxx.ttsdemo.Camera2BasicFragment.java

/**
 * Lock the focus as the first step for a still image capture.
 *///from  w  w  w. j ava 2s  . co m
private void lockFocus() {
    try {
        // This is how to tell the camera to lock focus.
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START);
        // Tell #mCaptureCallback to wait for the lock.
        mState = STATE_WAITING_LOCK;
        Log.v(LOG_TAG, "lockFocus");
        mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, mBackgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

From source file:com.vest.album.fragment.CameraBasicFragment.java

/**
 * Lock the focus as the first step for a still image capture.
 *///w  ww  .j  a  v  a  2  s  .  com
private void lockFocus() {
    try {
        // This is how to tell the camera to lock focus.
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START);
        // Tell #mCaptureCallback to wait for the lock.
        mState = STATE_WAITING_LOCK;
        mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, mBackgroundHandler);
    } catch (CameraAccessException e) {
        callback.onPhotoError("?");
        e.printStackTrace();
    }
}

From source file:com.example.aschere.cdhprototype2.Camera2RawFragment.java

/**
 * Initiate a still image capture.//from  w w  w .  ja  v a2 s  . c om
 * <p/>
 * This function sends a capture request that initiates a pre-capture sequence in our state
 * machine that waits for auto-focus to finish, ending in a "locked" state where the lens is no
 * longer moving, waits for auto-exposure to choose a good exposure value, and waits for
 * auto-white-balance to converge.
 */
public String takePicture() {
    synchronized (mCameraStateLock) {
        mPendingUserCaptures++;

        Log.i("fragmentTakePicture", "Take Picture called!");
        // If we already triggered a pre-capture sequence, or are in a state where we cannot
        // do this, return immediately.
        /*if (mState != STATE_PREVIEW) {
           Log.w(TAG, "return immediately");
        return null;
        }*/
        setUpCameraOutputs();
        openCamera();
        startBackgroundThread();

        try {
            Log.i(TAG, "inside try");

            if (mPreviewRequestBuilder == null) {
                Log.i(TAG, "Have to create preview request builder");
                if (mCameraDevice == null) {
                    Log.w(TAG, "Camera device not opened?");
                    setUpCameraOutputs();
                    openCamera();
                }
                createCameraPreviewSessionLocked();
            }
            // Update state machine to wait for auto-focus, auto-exposure, and
            // auto-white-balance (aka. "3A") to converge.
            mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
                    CameraMetadata.CONTROL_AF_TRIGGER_START);
            mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER,
                    CameraMetadata.CONTROL_AE_PRECAPTURE_TRIGGER_START);
            mState = STATE_WAITING_FOR_3A_CONVERGENCE;

            // Start a timer for the pre-capture sequence.
            startTimerLocked();

            // Replace the existing repeating request with one with updated 3A triggers.
            mCaptureSession.capture(mPreviewRequestBuilder.build(), mPreCaptureCallback, mBackgroundHandler);
            //closeCamera();
            int count = 0;
            while (!imageReturnable) {
                count++;
            }
            Log.i(TAG, "Image acquired!" + count);
            imageReturnable = false;
            return imageToReturn;
        } catch (CameraAccessException e) {
            e.printStackTrace();
        } finally {
            closeCamera();
        }
        return null;
    }
}

From source file:com.ape.camera2raw.Camera2RawFragment.java

/**
 * Initiate a still image capture.//  w  w w  .  j  av  a  2  s .com
 * <p/>
 * This function sends a capture request that initiates a pre-capture sequence in our state
 * machine that waits for auto-focus to finish, ending in a "locked" state where the lens is no
 * longer moving, waits for auto-exposure to choose a good exposure value, and waits for
 * auto-white-balance to converge.
 */
private void takePicture() {
    synchronized (mCameraStateLock) {
        mPendingUserCaptures++;

        // If we already triggered a pre-capture sequence, or are in a state where we cannot
        // do this, return immediately.
        if (mState != STATE_PREVIEW) {
            return;
        }

        try {
            // Trigger an auto-focus run if camera is capable. If the camera is already focused,
            // this should do nothing.
            if (!mNoAFRun) {
                mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
                        CameraMetadata.CONTROL_AF_TRIGGER_START);
            }

            // If this is not a legacy device, we can also trigger an auto-exposure metering
            // run.
            if (!isLegacyLocked()) {
                // Tell the camera to lock focus.
                mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER,
                        CameraMetadata.CONTROL_AE_PRECAPTURE_TRIGGER_START);
            }

            // Update state machine to wait for auto-focus, auto-exposure, and
            // auto-white-balance (aka. "3A") to converge.
            mState = STATE_WAITING_FOR_3A_CONVERGENCE;

            // Start a timer for the pre-capture sequence.
            startTimerLocked();

            // Replace the existing repeating request with one with updated 3A triggers.
            mCaptureSession.capture(mPreviewRequestBuilder.build(), mPreCaptureCallback, mBackgroundHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }
}

Example usage for android.hardware.camera2 CameraMetadata CONTROL_AF_TRIGGER_START

Introduction

Prototype

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Usage