android.hardware.camera2.CaptureResult#CONTROL_AF_STATE_FOCUSED_LOCKED源码实例Demo

private boolean isAFAcceptable(TotalCaptureResultProxy metadata)
{
    Integer afState = metadata.get(CaptureResult.CONTROL_AF_STATE);
    if (afState == null)
    {
        return true;
    } else
    {
        switch (afState)
        {
            case CaptureResult.CONTROL_AF_STATE_INACTIVE:
            case CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED:
            case CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED:
            case CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED:
            case CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED:
                return true;
            default:
                return false;
        }
    }
}
 

/**
 * Convert reported camera2 AF state to OneCamera AutoFocusState.
 */
public static OneCamera.AutoFocusState stateFromCamera2State(int state)
{
    switch (state)
    {
        case CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN:
            return OneCamera.AutoFocusState.ACTIVE_SCAN;
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN:
            return OneCamera.AutoFocusState.PASSIVE_SCAN;
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED:
            return OneCamera.AutoFocusState.PASSIVE_FOCUSED;
        case CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED:
            return OneCamera.AutoFocusState.ACTIVE_FOCUSED;
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED:
            return OneCamera.AutoFocusState.PASSIVE_UNFOCUSED;
        case CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED:
            return OneCamera.AutoFocusState.ACTIVE_UNFOCUSED;
        default:
            return OneCamera.AutoFocusState.INACTIVE;
    }
}
 

/**
 * Utility function: converts CaptureResult.CONTROL_AF_STATE to String.
 */
private static String controlAFStateToString(int controlAFState)
{
    switch (controlAFState)
    {
        case CaptureResult.CONTROL_AF_STATE_INACTIVE:
            return "inactive";
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN:
            return "passive_scan";
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED:
            return "passive_focused";
        case CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN:
            return "active_scan";
        case CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED:
            return "focus_locked";
        case CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED:
            return "not_focus_locked";
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED:
            return "passive_unfocused";
        default:
            return "unknown";
    }
}
 

private void process(CaptureResult result) {
    Integer state = result.get(CaptureResult.CONTROL_AF_STATE);
    if (null == state) {
        return;
    }
    Log.d(TAG, "process: CONTROL_AF_STATE: " + state);
    if (state == CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED || state == CaptureResult
            .CONTROL_AF_STATE_NOT_FOCUSED_LOCKED) {
        Log.d(TAG, "process: start normal preview");
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_CANCEL);
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest
                .CONTROL_AF_MODE_CONTINUOUS_PICTURE);
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.FLASH_MODE_OFF);
        startPreview();
    }
}
 

/**
 * Auto-Focus の状態を文字列に変換します。
 *
 * @param afState Auto Focus の状態
 * @return 文字列
 */
static String debugAFState(Integer afState) {
    if (afState == null) {
        return "NULL";
    }

    switch (afState) {
        default:
            return "UNKNOWN";
        case CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN:
            return "CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN";
        case CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED:
            return "CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED";
        case CaptureResult.CONTROL_AF_STATE_INACTIVE:
            return "CaptureResult.CONTROL_AF_STATE_INACTIVE";
        case CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED:
            return "CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED";
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED:
            return "CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED";
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN:
            return "CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN";
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED:
            return "CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED";
    }
}
 

@Override
public void onCaptureResult(CaptureResult result, boolean isCompleted) {
    Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
    boolean isAfReady = afState == null
            || afState == CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED
            || afState == CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED;
    if (isAfReady) {
        nextState(mAutoExposureState);
    }
}
 

@Override
public void onCaptureResult(CaptureResult result, boolean isCompleted) {
    Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
    if (DEBUG) {
        Log.d(TAG, "afState: " + Camera2Helper.debugAFState(afState) + " isCompleted: " + isCompleted);
    }
    boolean isAfReady = afState == null
            || afState == CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED
            || afState == CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED
            || afState == CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED;
    boolean timeout = (System.currentTimeMillis() - mStartTime) > 5000;
    if (isAfReady || timeout) {
        nextState(mAutoExposureState);
    }
}
 

@Override
public void monitorControlStates(CaptureResult result) {
    Integer afStateMaybe = result.get(CaptureResult.CONTROL_AF_STATE);
    if (afStateMaybe != null) {
        int afState = afStateMaybe;
        // Since we handle both partial and total results for multiple frames here, we
        // might get the final callbacks for an earlier frame after receiving one or
        // more that correspond to the next one. To prevent our data from oscillating,
        // we never consider AF states that are older than the last one we've seen.
        if (result.getFrameNumber() > mLastAfFrameNumber) {
            boolean afStateChanged = afState != mLastAfState;
            mLastAfState = afState;
            mLastAfFrameNumber = result.getFrameNumber();

            switch (afState) {
                case CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN:
                case CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED:
                case CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED: {
                    if (afStateChanged && mPassiveAfCallback != null) {
                        // A CameraAFMoveCallback is attached. If we just started to
                        // scan, the motor is moving; otherwise, it has settled.
                        mPassiveAfCallback.onAutoFocusMoving(
                                afState == CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN,
                                mCameraProxy);
                    }
                    break;
                }

                case CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED:
                case CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED: {
                    // This check must be made regardless of whether the focus state has
                    // changed recently to avoid infinite waiting during autoFocus()
                    // when the algorithm has already either converged or failed to.
                    if (mOneshotAfCallback != null) {
                        // A call to autoFocus() was just made to request a focus lock.
                        // Notify the caller that the lens is now indefinitely fixed,
                        // and report whether the image we're stuck with is in focus.
                        mOneshotAfCallback.onAutoFocus(
                                afState == CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED,
                                mCameraProxy);
                        mOneshotAfCallback = null;
                    }
                    break;
                }
            }
        }
    }

    Integer aeStateMaybe = result.get(CaptureResult.CONTROL_AE_STATE);
    if (aeStateMaybe != null) {
        int aeState = aeStateMaybe;
        // Since we handle both partial and total results for multiple frames here, we
        // might get the final callbacks for an earlier frame after receiving one or
        // more that correspond to the next one. To prevent our data from oscillating,
        // we never consider AE states that are older than the last one we've seen.
        if (result.getFrameNumber() > mLastAeFrameNumber) {
            mCurrentAeState = aeStateMaybe;
            mLastAeFrameNumber = result.getFrameNumber();

            switch (aeState) {
                case CaptureResult.CONTROL_AE_STATE_CONVERGED:
                case CaptureResult.CONTROL_AE_STATE_FLASH_REQUIRED:
                case CaptureResult.CONTROL_AE_STATE_LOCKED: {
                    // This check must be made regardless of whether the exposure state
                    // has changed recently to avoid infinite waiting during
                    // takePicture() when the algorithm has already converged.
                    if (mOneshotCaptureCallback != null) {
                        // A call to takePicture() was just made, and autoexposure
                        // converged so it's time to initiate the capture!
                        mCaptureReader.setOnImageAvailableListener(
                                /*listener*/mOneshotCaptureCallback,
                                /*handler*/Camera2Handler.this);
                        try {
                            mSession.capture(
                                    mPersistentSettings.createRequest(mCamera,
                                            CameraDevice.TEMPLATE_STILL_CAPTURE,
                                            mCaptureReader.getSurface()),
                                    /*callback*/mOneshotCaptureCallback,
                                    /*handler*/Camera2Handler.this);
                        } catch (CameraAccessException ex) {
                            Log.e(TAG, "Unable to initiate capture", ex);
                        } finally {
                            mOneshotCaptureCallback = null;
                        }
                    }
                    break;
                }
            }
        }
    }
}
 

/**
 * Invoke every time we get a new CaptureResult via
 * {@link CameraDevice.CaptureCallback#onCaptureCompleted}.
 *
 * <p>This function is responsible for dispatching updates via the
 * {@link AutoFocusStateListener} so without calling this on a regular basis, no
 * AF changes will be observed.</p>
 *
 * @param result CaptureResult
 */
public synchronized void onCaptureCompleted(CaptureResult result) {

    /**
     * Work-around for b/11269834
     * Although these should never-ever happen, harden for ship
     */
    if (result == null) {
        Log.w(TAG, "onCaptureCompleted - missing result, skipping AF update");
        return;
    }

    Key<Integer> keyAfState = CaptureResult.CONTROL_AF_STATE;
    if (keyAfState == null) {
        Log.e(TAG, "onCaptureCompleted - missing android.control.afState key, " +
                "skipping AF update");
        return;
    }

    Key<Integer> keyAfMode = CaptureResult.CONTROL_AF_MODE;
    if (keyAfMode == null) {
        Log.e(TAG, "onCaptureCompleted - missing android.control.afMode key, " +
                "skipping AF update");
        return;
    }

    Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
    Integer afMode = result.get(CaptureResult.CONTROL_AF_MODE);

    /**
     * Work-around for b/11238865
     * This is a HAL bug as these fields should be there always.
     */
    if (afState == null) {
        Log.w(TAG, "onCaptureCompleted - missing android.control.afState !");
        return;
    } else if (afMode == null) {
        Log.w(TAG, "onCaptureCompleted - missing android.control.afMode !");
        return;
    }

    if (DEBUG_LOGGING) Log.d(TAG, "onCaptureCompleted - new AF mode = " + afMode +
            " new AF state = " + afState);

    if (mLastAfState == afState && afMode == mLastAfMode) {
        // Same AF state as last time, nothing else needs to be done.
        return;
    }

    if (VERBOSE_LOGGING) Log.v(TAG, "onCaptureCompleted - new AF mode = " + afMode +
            " new AF state = " + afState);

    mLastAfState = afState;
    mLastAfMode = afMode;

    switch (afState) {
        case CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED:
            mListener.onAutoFocusSuccess(result, /*locked*/true);
            endTraceAsync();
            break;
        case CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED:
            mListener.onAutoFocusFail(result, /*locked*/true);
            endTraceAsync();
            break;
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_FOCUSED:
            mListener.onAutoFocusSuccess(result, /*locked*/false);
            break;
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED:
            mListener.onAutoFocusFail(result, /*locked*/false);
            break;
        case CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN:
            mListener.onAutoFocusScan(result);
            break;
        case CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN:
            mListener.onAutoFocusScan(result);
            break;
        case CaptureResult.CONTROL_AF_STATE_INACTIVE:
            mListener.onAutoFocusInactive(result);
            break;
    }
}
 

private void process(CaptureResult result) {
    synchronized (mCameraStateLock) {
        switch (mState) {
            case STATE_PREVIEW: {
                // We have nothing to do when the camera preview is running normally.
                break;
            }
            case STATE_WAITING_FOR_3A_CONVERGENCE: {
                boolean readyToCapture = true;
                if (!mNoAFRun) {
                    Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
                    if (afState == null) {
                        break;
                    }

                    // If auto-focus has reached locked state, we are ready to capture
                    readyToCapture =
                            (afState == CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED ||
                                    afState == CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED);
                }

                // If we are running on an non-legacy device, we should also wait until
                // auto-exposure and auto-white-balance have converged as well before
                // taking a picture.
                if (!isLegacyLocked()) {
                    Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                    Integer awbState = result.get(CaptureResult.CONTROL_AWB_STATE);
                    if (aeState == null || awbState == null) {
                        break;
                    }

                    readyToCapture = readyToCapture &&
                            aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED &&
                            awbState == CaptureResult.CONTROL_AWB_STATE_CONVERGED;
                }

                // If we haven't finished the pre-capture sequence but have hit our maximum
                // wait timeout, too bad! Begin capture anyway.
                if (!readyToCapture && hitTimeoutLocked()) {
                    Log.w(TAG, "Timed out waiting for pre-capture sequence to complete.");
                    readyToCapture = true;
                }

                if (readyToCapture && mPendingUserCaptures > 0) {
                    // Capture once for each user tap of the "Picture" button.
                    while (mPendingUserCaptures > 0) {
                        captureStillPictureLocked();
                        mPendingUserCaptures--;
                    }
                    // After this, the camera will go back to the normal state of preview.
                    mState = STATE_PREVIEW;
                }
            }
        }
    }
}
 

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void  setupJPEGCaptureListener() {
    mCaptureCallback = new CameraCaptureSession.CaptureCallback() {
       private void process(CaptureResult result) {
                switch (mState) {
                    case STATE_PREVIEW: {
                        // We have nothing to do when the camera preview is working normally.
                        break;
                    }
                    case STATE_WAITING_LOCK: {
                            int afState = result.get(CaptureResult.CONTROL_AF_STATE);
                            if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState ||
                                    CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState) {
                                // CONTROL_AE_STATE can be null on some devices
                                Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                                if (aeState == null ||
                                        aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED) {
                                    mState = STATE_WAITING_NON_PRECAPTURE;
                                    captureStillPicture();
                                } else {
                                    runPrecaptureSequence();
                                }
                            }
                        break;
                    }
                    case STATE_WAITING_PRECAPTURE: {
                            // CONTROL_AE_STATE can be null on some devices
                            Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                            if (aeState == null ||
                                    aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE ||
                                    aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) {
                                mState = STATE_WAITING_NON_PRECAPTURE;
                            }
                        break;
                    }
                    case STATE_WAITING_NON_PRECAPTURE: {
                            // CONTROL_AE_STATE can be null on some devices
                            Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                            if (aeState == null || aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) {
                                mState = STATE_PICTURE_TAKEN;
                                captureStillPicture();
                            }
                        break;
                    }
                }
            }
        };
 }