| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.StringTokenizer; |
| import java.io.IOException; |
| |
| import android.util.Log; |
| import android.view.Surface; |
| import android.view.SurfaceHolder; |
| import android.graphics.PixelFormat; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| |
| /** |
| * The Camera class is used to connect/disconnect with the camera service, |
| * set capture settings, start/stop preview, snap a picture, and retrieve |
| * frames for encoding for video. |
| * <p>There is no default constructor for this class. Use {@link #open()} to |
| * get a Camera object.</p> |
| * |
| * <p>In order to use the device camera, you must declare the |
| * {@link android.Manifest.permission#CAMERA} permission in your Android |
| * Manifest. Also be sure to include the |
| * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> |
| * manifest element in order to declare camera features used by your application. |
| * For example, if you use the camera and auto-focus feature, your Manifest |
| * should include the following:</p> |
| * <pre> <uses-permission android:name="android.permission.CAMERA" /> |
| * <uses-feature android:name="android.hardware.camera" /> |
| * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> |
| * |
| * <p class="caution"><strong>Caution:</strong> Different Android-powered devices |
| * may have different hardware specifications, such as megapixel ratings and |
| * auto-focus capabilities. In order for your application to be compatible with |
| * more devices, you should not make assumptions about the device camera |
| * specifications.</p> |
| */ |
| public class Camera { |
| private static final String TAG = "Camera"; |
| |
| // These match the enums in frameworks/base/include/ui/Camera.h |
| private static final int CAMERA_MSG_ERROR = 0x001; |
| private static final int CAMERA_MSG_SHUTTER = 0x002; |
| private static final int CAMERA_MSG_FOCUS = 0x004; |
| private static final int CAMERA_MSG_ZOOM = 0x008; |
| private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; |
| private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; |
| private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; |
| private static final int CAMERA_MSG_RAW_IMAGE = 0x080; |
| private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; |
| private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; |
| |
| private int mNativeContext; // accessed by native methods |
| private EventHandler mEventHandler; |
| private ShutterCallback mShutterCallback; |
| private PictureCallback mRawImageCallback; |
| private PictureCallback mJpegCallback; |
| private PreviewCallback mPreviewCallback; |
| private PictureCallback mPostviewCallback; |
| private AutoFocusCallback mAutoFocusCallback; |
| private ZoomCallback mZoomCallback; |
| private ErrorCallback mErrorCallback; |
| private boolean mOneShot; |
| private boolean mWithBuffer; |
| |
| /** |
| * Returns a new Camera object. |
| */ |
| public static Camera open() { |
| return new Camera(); |
| } |
| |
| Camera() { |
| mShutterCallback = null; |
| mRawImageCallback = null; |
| mJpegCallback = null; |
| mPreviewCallback = null; |
| mPostviewCallback = null; |
| mZoomCallback = null; |
| |
| Looper looper; |
| if ((looper = Looper.myLooper()) != null) { |
| mEventHandler = new EventHandler(this, looper); |
| } else if ((looper = Looper.getMainLooper()) != null) { |
| mEventHandler = new EventHandler(this, looper); |
| } else { |
| mEventHandler = null; |
| } |
| |
| native_setup(new WeakReference<Camera>(this)); |
| } |
| |
| protected void finalize() { |
| native_release(); |
| } |
| |
| private native final void native_setup(Object camera_this); |
| private native final void native_release(); |
| |
| |
| /** |
| * Disconnects and releases the Camera object resources. |
| * <p>It is recommended that you call this as soon as you're done with the |
| * Camera object.</p> |
| */ |
| public final void release() { |
| native_release(); |
| } |
| |
| /** |
| * Reconnect to the camera after passing it to MediaRecorder. To save |
| * setup/teardown time, a client of Camera can pass an initialized Camera |
| * object to a MediaRecorder to use for video recording. Once the |
| * MediaRecorder is done with the Camera, this method can be used to |
| * re-establish a connection with the camera hardware. NOTE: The Camera |
| * object must first be unlocked by the process that owns it before it |
| * can be connected to another process. |
| * |
| * @throws IOException if the method fails. |
| * |
| * @hide |
| */ |
| public native final void reconnect() throws IOException; |
| |
| /** |
| * Lock the camera to prevent other processes from accessing it. To save |
| * setup/teardown time, a client of Camera can pass an initialized Camera |
| * object to another process. This method is used to re-lock the Camera |
| * object prevent other processes from accessing it. By default, the |
| * Camera object is locked. Locking it again from the same process will |
| * have no effect. Attempting to lock it from another process if it has |
| * not been unlocked will fail. |
| * |
| * @throws RuntimeException if the method fails. |
| */ |
| public native final void lock(); |
| |
| /** |
| * Unlock the camera to allow another process to access it. To save |
| * setup/teardown time, a client of Camera can pass an initialized Camera |
| * object to another process. This method is used to unlock the Camera |
| * object before handing off the Camera object to the other process. |
| * |
| * @throws RuntimeException if the method fails. |
| */ |
| public native final void unlock(); |
| |
| /** |
| * Sets the SurfaceHolder to be used for a picture preview. If the surface |
| * changed since the last call, the screen will blank. Nothing happens |
| * if the same surface is re-set. |
| * |
| * @param holder the SurfaceHolder upon which to place the picture preview |
| * @throws IOException if the method fails. |
| */ |
| public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { |
| if (holder != null) { |
| setPreviewDisplay(holder.getSurface()); |
| } else { |
| setPreviewDisplay((Surface)null); |
| } |
| } |
| |
| private native final void setPreviewDisplay(Surface surface); |
| |
| /** |
| * Used to get a copy of each preview frame. |
| */ |
| public interface PreviewCallback |
| { |
| /** |
| * The callback that delivers the preview frames. |
| * |
| * @param data The contents of the preview frame in the format defined |
| * by {@link android.graphics.PixelFormat}, which can be queried |
| * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. |
| * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} |
| * is never called, the default will be the YCbCr_420_SP |
| * (NV21) format. |
| * @param camera The Camera service object. |
| */ |
| void onPreviewFrame(byte[] data, Camera camera); |
| }; |
| |
| /** |
| * Start drawing preview frames to the surface. |
| */ |
| public native final void startPreview(); |
| |
| /** |
| * Stop drawing preview frames to the surface. |
| */ |
| public native final void stopPreview(); |
| |
| /** |
| * Return current preview state. |
| * |
| * FIXME: Unhide before release |
| * @hide |
| */ |
| public native final boolean previewEnabled(); |
| |
| /** |
| * Can be called at any time to instruct the camera to use a callback for |
| * each preview frame in addition to displaying it. |
| * |
| * @param cb A callback object that receives a copy of each preview frame. |
| * Pass null to stop receiving callbacks at any time. |
| */ |
| public final void setPreviewCallback(PreviewCallback cb) { |
| mPreviewCallback = cb; |
| mOneShot = false; |
| mWithBuffer = false; |
| // Always use one-shot mode. We fake camera preview mode by |
| // doing one-shot preview continuously. |
| setHasPreviewCallback(cb != null, false); |
| } |
| |
| /** |
| * Installs a callback to retrieve a single preview frame, after which the |
| * callback is cleared. |
| * |
| * @param cb A callback object that receives a copy of the preview frame. |
| */ |
| public final void setOneShotPreviewCallback(PreviewCallback cb) { |
| mPreviewCallback = cb; |
| mOneShot = true; |
| mWithBuffer = false; |
| setHasPreviewCallback(cb != null, false); |
| } |
| |
| private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); |
| |
| /** |
| * Installs a callback which will get called as long as there are buffers in the |
| * preview buffer queue, which minimizes dynamic allocation of preview buffers. |
| * |
| * Apps must call addCallbackBuffer to explicitly register the buffers to use, or no callbacks |
| * will be received. addCallbackBuffer may be safely called before or after |
| * a call to setPreviewCallbackWithBuffer with a non-null callback parameter. |
| * |
| * The buffer queue will be cleared upon any calls to setOneShotPreviewCallback, |
| * setPreviewCallback, or to this method with a null callback parameter. |
| * |
| * @param cb A callback object that receives a copy of the preview frame. A null value will clear the queue. |
| * @hide |
| */ |
| public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { |
| mPreviewCallback = cb; |
| mOneShot = false; |
| mWithBuffer = true; |
| setHasPreviewCallback(cb != null, true); |
| } |
| |
| /** |
| * Adds a pre-allocated buffer to the callback buffer queue. |
| * Preview width and height can be determined from getPreviewSize, and bitsPerPixel can be |
| * found from from {@link android.hardware.Camera.Parameters#getPreviewFormat()} and |
| * {@link android.graphics.PixelFormat#getPixelFormatInfo(int, PixelFormat)} |
| * |
| * Alternatively, a buffer from a previous callback may be passed in or used |
| * to determine the size of new preview frame buffers. |
| * |
| * @param callbackBuffer The buffer to register. Size should be width * height * bitsPerPixel / 8. |
| * @hide |
| */ |
| public native final void addCallbackBuffer(byte[] callbackBuffer); |
| |
| private class EventHandler extends Handler |
| { |
| private Camera mCamera; |
| |
| public EventHandler(Camera c, Looper looper) { |
| super(looper); |
| mCamera = c; |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch(msg.what) { |
| case CAMERA_MSG_SHUTTER: |
| if (mShutterCallback != null) { |
| mShutterCallback.onShutter(); |
| } |
| return; |
| |
| case CAMERA_MSG_RAW_IMAGE: |
| if (mRawImageCallback != null) { |
| mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); |
| } |
| return; |
| |
| case CAMERA_MSG_COMPRESSED_IMAGE: |
| if (mJpegCallback != null) { |
| mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); |
| } |
| return; |
| |
| case CAMERA_MSG_PREVIEW_FRAME: |
| if (mPreviewCallback != null) { |
| PreviewCallback cb = mPreviewCallback; |
| if (mOneShot) { |
| // Clear the callback variable before the callback |
| // in case the app calls setPreviewCallback from |
| // the callback function |
| mPreviewCallback = null; |
| } else if (!mWithBuffer) { |
| // We're faking the camera preview mode to prevent |
| // the app from being flooded with preview frames. |
| // Set to oneshot mode again. |
| setHasPreviewCallback(true, false); |
| } |
| cb.onPreviewFrame((byte[])msg.obj, mCamera); |
| } |
| return; |
| |
| case CAMERA_MSG_POSTVIEW_FRAME: |
| if (mPostviewCallback != null) { |
| mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); |
| } |
| return; |
| |
| case CAMERA_MSG_FOCUS: |
| if (mAutoFocusCallback != null) { |
| mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); |
| } |
| return; |
| |
| case CAMERA_MSG_ZOOM: |
| if (mZoomCallback != null) { |
| mZoomCallback.onZoomUpdate(msg.arg1, msg.arg2 != 0, mCamera); |
| } |
| return; |
| |
| case CAMERA_MSG_ERROR : |
| Log.e(TAG, "Error " + msg.arg1); |
| if (mErrorCallback != null) { |
| mErrorCallback.onError(msg.arg1, mCamera); |
| } |
| return; |
| |
| default: |
| Log.e(TAG, "Unknown message type " + msg.what); |
| return; |
| } |
| } |
| } |
| |
| private static void postEventFromNative(Object camera_ref, |
| int what, int arg1, int arg2, Object obj) |
| { |
| Camera c = (Camera)((WeakReference)camera_ref).get(); |
| if (c == null) |
| return; |
| |
| if (c.mEventHandler != null) { |
| Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); |
| c.mEventHandler.sendMessage(m); |
| } |
| } |
| |
| /** |
| * Handles the callback for the camera auto focus. |
| * <p>Devices that do not support auto-focus will receive a "fake" |
| * callback to this interface. If your application needs auto-focus and |
| * should not be installed on devices <em>without</em> auto-focus, you must |
| * declare that your app uses the |
| * {@code android.hardware.camera.autofocus} feature, in the |
| * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> |
| * manifest element.</p> |
| */ |
| public interface AutoFocusCallback |
| { |
| /** |
| * Callback for the camera auto focus. If the camera does not support |
| * auto-focus and autoFocus is called, onAutoFocus will be called |
| * immediately with success. |
| * |
| * @param success true if focus was successful, false if otherwise |
| * @param camera the Camera service object |
| */ |
| void onAutoFocus(boolean success, Camera camera); |
| }; |
| |
| /** |
| * Starts auto-focus function and registers a callback function to run when |
| * camera is focused. Only valid after startPreview() has been called. |
| * Applications should call {@link |
| * android.hardware.Camera.Parameters#getFocusMode()} to determine if this |
| * method should be called. If the camera does not support auto-focus, it is |
| * a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} |
| * callback will be called immediately. |
| * <p>If your application should not be installed |
| * on devices without auto-focus, you must declare that your application |
| * uses auto-focus with the |
| * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> |
| * manifest element.</p> |
| * <p>If the current flash mode is not |
| * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be |
| * fired during auto-focus depending on the driver.<p> |
| * |
| * @param cb the callback to run |
| */ |
| public final void autoFocus(AutoFocusCallback cb) |
| { |
| mAutoFocusCallback = cb; |
| native_autoFocus(); |
| } |
| private native final void native_autoFocus(); |
| |
| /** |
| * Cancels auto-focus function. If the auto-focus is still in progress, |
| * this function will cancel it. Whether the auto-focus is in progress |
| * or not, this function will return the focus position to the default. |
| * If the camera does not support auto-focus, this is a no-op. |
| */ |
| public final void cancelAutoFocus() |
| { |
| mAutoFocusCallback = null; |
| native_cancelAutoFocus(); |
| } |
| private native final void native_cancelAutoFocus(); |
| |
| /** |
| * An interface which contains a callback for the shutter closing after taking a picture. |
| */ |
| public interface ShutterCallback |
| { |
| /** |
| * Can be used to play a shutter sound as soon as the image has been captured, but before |
| * the data is available. |
| */ |
| void onShutter(); |
| } |
| |
| /** |
| * Handles the callback for when a picture is taken. |
| */ |
| public interface PictureCallback { |
| /** |
| * Callback for when a picture is taken. |
| * |
| * @param data a byte array of the picture data |
| * @param camera the Camera service object |
| */ |
| void onPictureTaken(byte[] data, Camera camera); |
| }; |
| |
| /** |
| * Triggers an asynchronous image capture. The camera service will initiate |
| * a series of callbacks to the application as the image capture progresses. |
| * The shutter callback occurs after the image is captured. This can be used |
| * to trigger a sound to let the user know that image has been captured. The |
| * raw callback occurs when the raw image data is available (NOTE: the data |
| * may be null if the hardware does not have enough memory to make a copy). |
| * The jpeg callback occurs when the compressed image is available. If the |
| * application does not need a particular callback, a null can be passed |
| * instead of a callback method. |
| * |
| * @param shutter callback after the image is captured, may be null |
| * @param raw callback with raw image data, may be null |
| * @param jpeg callback with jpeg image data, may be null |
| */ |
| public final void takePicture(ShutterCallback shutter, PictureCallback raw, |
| PictureCallback jpeg) { |
| takePicture(shutter, raw, null, jpeg); |
| } |
| private native final void native_takePicture(); |
| |
| /** |
| * Triggers an asynchronous image capture. The camera service will initiate |
| * a series of callbacks to the application as the image capture progresses. |
| * The shutter callback occurs after the image is captured. This can be used |
| * to trigger a sound to let the user know that image has been captured. The |
| * raw callback occurs when the raw image data is available (NOTE: the data |
| * may be null if the hardware does not have enough memory to make a copy). |
| * The postview callback occurs when a scaled, fully processed postview |
| * image is available (NOTE: not all hardware supports this). The jpeg |
| * callback occurs when the compressed image is available. If the |
| * application does not need a particular callback, a null can be passed |
| * instead of a callback method. |
| * |
| * @param shutter callback after the image is captured, may be null |
| * @param raw callback with raw image data, may be null |
| * @param postview callback with postview image data, may be null |
| * @param jpeg callback with jpeg image data, may be null |
| */ |
| public final void takePicture(ShutterCallback shutter, PictureCallback raw, |
| PictureCallback postview, PictureCallback jpeg) { |
| mShutterCallback = shutter; |
| mRawImageCallback = raw; |
| mPostviewCallback = postview; |
| mJpegCallback = jpeg; |
| native_takePicture(); |
| } |
| |
| /** |
| * Zooms to the requested value smoothly. Driver will generate {@link |
| * #ZoomCallback} for the current zoom value and whether zoom is stopped. |
| * The applications can call {@link #stopSmoothZoom} to stop the zoom |
| * earlier. The applications should not call startSmoothZoom again or {@link |
| * android.hardware.Camera.Parameters#setZoom(int)} before the zoom stops. |
| * |
| * @param value zoom value. The valid range is 0 to {@link |
| * android.hardware.Camera.Parameters#getMaxZoom}. |
| * @hide |
| */ |
| public native final void startSmoothZoom(int value); |
| |
| /** |
| * Stops the smooth zoom. The applications should wait for the {@link |
| * #ZoomCallback} to know when the zoom is actually stopped. |
| * @hide |
| */ |
| public native final void stopSmoothZoom(); |
| |
| /** |
| * Handles the zoom callback. |
| * |
| * @hide |
| */ |
| public interface ZoomCallback |
| { |
| /** |
| * Callback for zoom updates |
| * |
| * @param zoomValue the current zoom value. In smooth zoom mode, camera |
| * generates this callback for every new zoom value. |
| * @param stopped whether smooth zoom is stopped. If the value is true, |
| * this is the last zoom update for the application. |
| * |
| * @param camera the Camera service object |
| * @see android.hardware.Camera.Parameters#startSmoothZoom |
| */ |
| void onZoomUpdate(int zoomValue, boolean stopped, Camera camera); |
| }; |
| |
| /** |
| * Registers a callback to be invoked when the zoom value is updated by the |
| * camera driver during smooth zoom. |
| * @param cb the callback to run |
| * @hide |
| */ |
| public final void setZoomCallback(ZoomCallback cb) |
| { |
| mZoomCallback = cb; |
| } |
| |
| // These match the enum in include/ui/Camera.h |
| /** Unspecified camerar error. @see #ErrorCallback */ |
| public static final int CAMERA_ERROR_UNKNOWN = 1; |
| /** Media server died. In this case, the application must release the |
| * Camera object and instantiate a new one. @see #ErrorCallback */ |
| public static final int CAMERA_ERROR_SERVER_DIED = 100; |
| |
| /** |
| * Handles the camera error callback. |
| */ |
| public interface ErrorCallback |
| { |
| /** |
| * Callback for camera errors. |
| * @param error error code: |
| * <ul> |
| * <li>{@link #CAMERA_ERROR_UNKNOWN} |
| * <li>{@link #CAMERA_ERROR_SERVER_DIED} |
| * </ul> |
| * @param camera the Camera service object |
| */ |
| void onError(int error, Camera camera); |
| }; |
| |
| /** |
| * Registers a callback to be invoked when an error occurs. |
| * @param cb the callback to run |
| */ |
| public final void setErrorCallback(ErrorCallback cb) |
| { |
| mErrorCallback = cb; |
| } |
| |
| private native final void native_setParameters(String params); |
| private native final String native_getParameters(); |
| |
| /** |
| * Sets the Parameters for pictures from this Camera service. |
| * |
| * @param params the Parameters to use for this Camera service |
| */ |
| public void setParameters(Parameters params) { |
| native_setParameters(params.flatten()); |
| } |
| |
| /** |
| * Returns the picture Parameters for this Camera service. |
| */ |
| public Parameters getParameters() { |
| Parameters p = new Parameters(); |
| String s = native_getParameters(); |
| p.unflatten(s); |
| return p; |
| } |
| |
| /** |
| * Handles the picture size (dimensions). |
| */ |
| public class Size { |
| /** |
| * Sets the dimensions for pictures. |
| * |
| * @param w the photo width (pixels) |
| * @param h the photo height (pixels) |
| */ |
| public Size(int w, int h) { |
| width = w; |
| height = h; |
| } |
| /** width of the picture */ |
| public int width; |
| /** height of the picture */ |
| public int height; |
| }; |
| |
| /** |
| * Handles the parameters for pictures created by a Camera service. |
| * |
| * <p>To make camera parameters take effect, applications have to call |
| * Camera.setParameters. For example, after setWhiteBalance is called, white |
| * balance is not changed until Camera.setParameters() is called. |
| * |
| * <p>Different devices may have different camera capabilities, such as |
| * picture size or flash modes. The application should query the camera |
| * capabilities before setting parameters. For example, the application |
| * should call getSupportedColorEffects before calling setEffect. If the |
| * camera does not support color effects, getSupportedColorEffects will |
| * return null. |
| */ |
| public class Parameters { |
| // Parameter keys to communicate with the camera driver. |
| private static final String KEY_PREVIEW_SIZE = "preview-size"; |
| private static final String KEY_PREVIEW_FORMAT = "preview-format"; |
| private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; |
| private static final String KEY_PICTURE_SIZE = "picture-size"; |
| private static final String KEY_PICTURE_FORMAT = "picture-format"; |
| private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; |
| private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; |
| private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; |
| private static final String KEY_JPEG_QUALITY = "jpeg-quality"; |
| private static final String KEY_ROTATION = "rotation"; |
| private static final String KEY_GPS_LATITUDE = "gps-latitude"; |
| private static final String KEY_GPS_LONGITUDE = "gps-longitude"; |
| private static final String KEY_GPS_ALTITUDE = "gps-altitude"; |
| private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; |
| private static final String KEY_WHITE_BALANCE = "whitebalance"; |
| private static final String KEY_EFFECT = "effect"; |
| private static final String KEY_ANTIBANDING = "antibanding"; |
| private static final String KEY_SCENE_MODE = "scene-mode"; |
| private static final String KEY_FLASH_MODE = "flash-mode"; |
| private static final String KEY_FOCUS_MODE = "focus-mode"; |
| // Parameter key suffix for supported values. |
| private static final String SUPPORTED_VALUES_SUFFIX = "-values"; |
| |
| // Values for white balance settings. |
| public static final String WHITE_BALANCE_AUTO = "auto"; |
| public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; |
| public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; |
| public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; |
| public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; |
| public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; |
| public static final String WHITE_BALANCE_TWILIGHT = "twilight"; |
| public static final String WHITE_BALANCE_SHADE = "shade"; |
| |
| // Values for color effect settings. |
| public static final String EFFECT_NONE = "none"; |
| public static final String EFFECT_MONO = "mono"; |
| public static final String EFFECT_NEGATIVE = "negative"; |
| public static final String EFFECT_SOLARIZE = "solarize"; |
| public static final String EFFECT_SEPIA = "sepia"; |
| public static final String EFFECT_POSTERIZE = "posterize"; |
| public static final String EFFECT_WHITEBOARD = "whiteboard"; |
| public static final String EFFECT_BLACKBOARD = "blackboard"; |
| public static final String EFFECT_AQUA = "aqua"; |
| |
| // Values for antibanding settings. |
| public static final String ANTIBANDING_AUTO = "auto"; |
| public static final String ANTIBANDING_50HZ = "50hz"; |
| public static final String ANTIBANDING_60HZ = "60hz"; |
| public static final String ANTIBANDING_OFF = "off"; |
| |
| // Values for flash mode settings. |
| /** |
| * Flash will not be fired. |
| */ |
| public static final String FLASH_MODE_OFF = "off"; |
| |
| /** |
| * Flash will be fired automatically when required. The flash may be fired |
| * during preview, auto-focus, or snapshot depending on the driver. |
| */ |
| public static final String FLASH_MODE_AUTO = "auto"; |
| |
| /** |
| * Flash will always be fired during snapshot. The flash may also be |
| * fired during preview or auto-focus depending on the driver. |
| */ |
| public static final String FLASH_MODE_ON = "on"; |
| |
| /** |
| * Flash will be fired in red-eye reduction mode. |
| */ |
| public static final String FLASH_MODE_RED_EYE = "red-eye"; |
| |
| /** |
| * Constant emission of light during preview, auto-focus and snapshot. |
| * This can also be used for video recording. |
| */ |
| public static final String FLASH_MODE_TORCH = "torch"; |
| |
| // Values for scene mode settings. |
| public static final String SCENE_MODE_AUTO = "auto"; |
| public static final String SCENE_MODE_ACTION = "action"; |
| public static final String SCENE_MODE_PORTRAIT = "portrait"; |
| public static final String SCENE_MODE_LANDSCAPE = "landscape"; |
| public static final String SCENE_MODE_NIGHT = "night"; |
| public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; |
| public static final String SCENE_MODE_THEATRE = "theatre"; |
| public static final String SCENE_MODE_BEACH = "beach"; |
| public static final String SCENE_MODE_SNOW = "snow"; |
| public static final String SCENE_MODE_SUNSET = "sunset"; |
| public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; |
| public static final String SCENE_MODE_FIREWORKS = "fireworks"; |
| public static final String SCENE_MODE_SPORTS = "sports"; |
| public static final String SCENE_MODE_PARTY = "party"; |
| public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; |
| |
| // Values for focus mode settings. |
| /** |
| * Auto-focus mode. |
| */ |
| public static final String FOCUS_MODE_AUTO = "auto"; |
| |
| /** |
| * Focus is set at infinity. Applications should not call |
| * {@link #autoFocus(AutoFocusCallback)} in this mode. |
| */ |
| public static final String FOCUS_MODE_INFINITY = "infinity"; |
| public static final String FOCUS_MODE_MACRO = "macro"; |
| |
| /** |
| * Focus is fixed. The camera is always in this mode if the focus is not |
| * adjustable. If the camera has auto-focus, this mode can fix the |
| * focus, which is usually at hyperfocal distance. Applications should |
| * not call {@link #autoFocus(AutoFocusCallback)} in this mode. |
| */ |
| public static final String FOCUS_MODE_FIXED = "fixed"; |
| |
| // Formats for setPreviewFormat and setPictureFormat. |
| private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; |
| private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; |
| private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; |
| private static final String PIXEL_FORMAT_RGB565 = "rgb565"; |
| private static final String PIXEL_FORMAT_JPEG = "jpeg"; |
| |
| private HashMap<String, String> mMap; |
| |
| private Parameters() { |
| mMap = new HashMap<String, String>(); |
| } |
| |
| /** |
| * Writes the current Parameters to the log. |
| * @hide |
| * @deprecated |
| */ |
| public void dump() { |
| Log.e(TAG, "dump: size=" + mMap.size()); |
| for (String k : mMap.keySet()) { |
| Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); |
| } |
| } |
| |
| /** |
| * Creates a single string with all the parameters set in |
| * this Parameters object. |
| * <p>The {@link #unflatten(String)} method does the reverse.</p> |
| * |
| * @return a String with all values from this Parameters object, in |
| * semi-colon delimited key-value pairs |
| */ |
| public String flatten() { |
| StringBuilder flattened = new StringBuilder(); |
| for (String k : mMap.keySet()) { |
| flattened.append(k); |
| flattened.append("="); |
| flattened.append(mMap.get(k)); |
| flattened.append(";"); |
| } |
| // chop off the extra semicolon at the end |
| flattened.deleteCharAt(flattened.length()-1); |
| return flattened.toString(); |
| } |
| |
| /** |
| * Takes a flattened string of parameters and adds each one to |
| * this Parameters object. |
| * <p>The {@link #flatten()} method does the reverse.</p> |
| * |
| * @param flattened a String of parameters (key-value paired) that |
| * are semi-colon delimited |
| */ |
| public void unflatten(String flattened) { |
| mMap.clear(); |
| |
| StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); |
| while (tokenizer.hasMoreElements()) { |
| String kv = tokenizer.nextToken(); |
| int pos = kv.indexOf('='); |
| if (pos == -1) { |
| continue; |
| } |
| String k = kv.substring(0, pos); |
| String v = kv.substring(pos + 1); |
| mMap.put(k, v); |
| } |
| } |
| |
| public void remove(String key) { |
| mMap.remove(key); |
| } |
| |
| /** |
| * Sets a String parameter. |
| * |
| * @param key the key name for the parameter |
| * @param value the String value of the parameter |
| */ |
| public void set(String key, String value) { |
| if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { |
| Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); |
| return; |
| } |
| if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { |
| Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); |
| return; |
| } |
| |
| mMap.put(key, value); |
| } |
| |
| /** |
| * Sets an integer parameter. |
| * |
| * @param key the key name for the parameter |
| * @param value the int value of the parameter |
| */ |
| public void set(String key, int value) { |
| mMap.put(key, Integer.toString(value)); |
| } |
| |
| /** |
| * Returns the value of a String parameter. |
| * |
| * @param key the key name for the parameter |
| * @return the String value of the parameter |
| */ |
| public String get(String key) { |
| return mMap.get(key); |
| } |
| |
| /** |
| * Returns the value of an integer parameter. |
| * |
| * @param key the key name for the parameter |
| * @return the int value of the parameter |
| */ |
| public int getInt(String key) { |
| return Integer.parseInt(mMap.get(key)); |
| } |
| |
| /** |
| * Sets the dimensions for preview pictures. |
| * |
| * @param width the width of the pictures, in pixels |
| * @param height the height of the pictures, in pixels |
| */ |
| public void setPreviewSize(int width, int height) { |
| String v = Integer.toString(width) + "x" + Integer.toString(height); |
| set(KEY_PREVIEW_SIZE, v); |
| } |
| |
| /** |
| * Returns the dimensions setting for preview pictures. |
| * |
| * @return a Size object with the height and width setting |
| * for the preview picture |
| */ |
| public Size getPreviewSize() { |
| String pair = get(KEY_PREVIEW_SIZE); |
| return strToSize(pair); |
| } |
| |
| /** |
| * Gets the supported preview sizes. |
| * |
| * @return a List of Size object. null if preview size setting is not |
| * supported. |
| */ |
| public List<Size> getSupportedPreviewSizes() { |
| String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); |
| return splitSize(str); |
| } |
| |
| /** |
| * Sets the dimensions for EXIF thumbnail in Jpeg picture. |
| * |
| * @param width the width of the thumbnail, in pixels |
| * @param height the height of the thumbnail, in pixels |
| */ |
| public void setJpegThumbnailSize(int width, int height) { |
| set(KEY_JPEG_THUMBNAIL_WIDTH, width); |
| set(KEY_JPEG_THUMBNAIL_HEIGHT, height); |
| } |
| |
| /** |
| * Returns the dimensions for EXIF thumbnail in Jpeg picture. |
| * |
| * @return a Size object with the height and width setting for the EXIF |
| * thumbnails |
| */ |
| public Size getJpegThumbnailSize() { |
| return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), |
| getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); |
| } |
| |
| /** |
| * Sets the quality of the EXIF thumbnail in Jpeg picture. |
| * |
| * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 |
| * to 100, with 100 being the best. |
| */ |
| public void setJpegThumbnailQuality(int quality) { |
| set(KEY_JPEG_THUMBNAIL_QUALITY, quality); |
| } |
| |
| /** |
| * Returns the quality setting for the EXIF thumbnail in Jpeg picture. |
| * |
| * @return the JPEG quality setting of the EXIF thumbnail. |
| */ |
| public int getJpegThumbnailQuality() { |
| return getInt(KEY_JPEG_THUMBNAIL_QUALITY); |
| } |
| |
| /** |
| * Sets Jpeg quality of captured picture. |
| * |
| * @param quality the JPEG quality of captured picture. The range is 1 |
| * to 100, with 100 being the best. |
| */ |
| public void setJpegQuality(int quality) { |
| set(KEY_JPEG_QUALITY, quality); |
| } |
| |
| /** |
| * Returns the quality setting for the JPEG picture. |
| * |
| * @return the JPEG picture quality setting. |
| */ |
| public int getJpegQuality() { |
| return getInt(KEY_JPEG_QUALITY); |
| } |
| |
| /** |
| * Sets the rate at which preview frames are received. |
| * |
| * @param fps the frame rate (frames per second) |
| */ |
| public void setPreviewFrameRate(int fps) { |
| set(KEY_PREVIEW_FRAME_RATE, fps); |
| } |
| |
| /** |
| * Returns the setting for the rate at which preview frames |
| * are received. |
| * |
| * @return the frame rate setting (frames per second) |
| */ |
| public int getPreviewFrameRate() { |
| return getInt(KEY_PREVIEW_FRAME_RATE); |
| } |
| |
| /** |
| * Gets the supported preview frame rates. |
| * |
| * @return a List of Integer objects (preview frame rates). null if |
| * preview frame rate setting is not supported. |
| */ |
| public List<Integer> getSupportedPreviewFrameRates() { |
| String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); |
| return splitInt(str); |
| } |
| |
| /** |
| * Sets the image format for preview pictures. |
| * <p>If this is never called, the default format will be |
| * {@link android.graphics.PixelFormat#YCbCr_420_SP}, which |
| * uses the NV21 encoding format.</p> |
| * |
| * @param pixel_format the desired preview picture format, defined |
| * by one of the {@link android.graphics.PixelFormat} constants. |
| * (E.g., <var>PixelFormat.YCbCr_420_SP</var> (default), |
| * <var>PixelFormat.RGB_565</var>, or |
| * <var>PixelFormat.JPEG</var>) |
| * @see android.graphics.PixelFormat |
| */ |
| public void setPreviewFormat(int pixel_format) { |
| String s = cameraFormatForPixelFormat(pixel_format); |
| if (s == null) { |
| throw new IllegalArgumentException( |
| "Invalid pixel_format=" + pixel_format); |
| } |
| |
| set(KEY_PREVIEW_FORMAT, s); |
| } |
| |
| /** |
| * Returns the image format for preview pictures got from |
| * {@link PreviewCallback}. |
| * |
| * @return the {@link android.graphics.PixelFormat} int representing |
| * the preview picture format. |
| */ |
| public int getPreviewFormat() { |
| return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); |
| } |
| |
| /** |
| * Gets the supported preview formats. |
| * |
| * @return a List of Integer objects. null if preview format setting is |
| * not supported. |
| */ |
| public List<Integer> getSupportedPreviewFormats() { |
| String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); |
| ArrayList<Integer> formats = new ArrayList<Integer>(); |
| for (String s : split(str)) { |
| int f = pixelFormatForCameraFormat(s); |
| if (f == PixelFormat.UNKNOWN) continue; |
| formats.add(f); |
| } |
| return formats; |
| } |
| |
| /** |
| * Sets the dimensions for pictures. |
| * |
| * @param width the width for pictures, in pixels |
| * @param height the height for pictures, in pixels |
| */ |
| public void setPictureSize(int width, int height) { |
| String v = Integer.toString(width) + "x" + Integer.toString(height); |
| set(KEY_PICTURE_SIZE, v); |
| } |
| |
| /** |
| * Returns the dimension setting for pictures. |
| * |
| * @return a Size object with the height and width setting |
| * for pictures |
| */ |
| public Size getPictureSize() { |
| String pair = get(KEY_PICTURE_SIZE); |
| return strToSize(pair); |
| } |
| |
| /** |
| * Gets the supported picture sizes. |
| * |
| * @return a List of Size objects. null if picture size setting is not |
| * supported. |
| */ |
| public List<Size> getSupportedPictureSizes() { |
| String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); |
| return splitSize(str); |
| } |
| |
| /** |
| * Sets the image format for pictures. |
| * |
| * @param pixel_format the desired picture format |
| * (<var>PixelFormat.YCbCr_420_SP (NV21)</var>, |
| * <var>PixelFormat.RGB_565</var>, or |
| * <var>PixelFormat.JPEG</var>) |
| * @see android.graphics.PixelFormat |
| */ |
| public void setPictureFormat(int pixel_format) { |
| String s = cameraFormatForPixelFormat(pixel_format); |
| if (s == null) { |
| throw new IllegalArgumentException( |
| "Invalid pixel_format=" + pixel_format); |
| } |
| |
| set(KEY_PICTURE_FORMAT, s); |
| } |
| |
| /** |
| * Returns the image format for pictures. |
| * |
| * @return the PixelFormat int representing the picture format |
| */ |
| public int getPictureFormat() { |
| return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); |
| } |
| |
| /** |
| * Gets the supported picture formats. |
| * |
| * @return a List of Integer objects (values are PixelFormat.XXX). null |
| * if picture setting is not supported. |
| */ |
| public List<Integer> getSupportedPictureFormats() { |
| String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); |
| return splitInt(str); |
| } |
| |
| private String cameraFormatForPixelFormat(int pixel_format) { |
| switch(pixel_format) { |
| case PixelFormat.YCbCr_422_SP: return PIXEL_FORMAT_YUV422SP; |
| case PixelFormat.YCbCr_420_SP: return PIXEL_FORMAT_YUV420SP; |
| case PixelFormat.YCbCr_422_I: return PIXEL_FORMAT_YUV422I; |
| case PixelFormat.RGB_565: return PIXEL_FORMAT_RGB565; |
| case PixelFormat.JPEG: return PIXEL_FORMAT_JPEG; |
| default: return null; |
| } |
| } |
| |
| private int pixelFormatForCameraFormat(String format) { |
| if (format == null) |
| return PixelFormat.UNKNOWN; |
| |
| if (format.equals(PIXEL_FORMAT_YUV422SP)) |
| return PixelFormat.YCbCr_422_SP; |
| |
| if (format.equals(PIXEL_FORMAT_YUV420SP)) |
| return PixelFormat.YCbCr_420_SP; |
| |
| if (format.equals(PIXEL_FORMAT_YUV422I)) |
| return PixelFormat.YCbCr_422_I; |
| |
| if (format.equals(PIXEL_FORMAT_RGB565)) |
| return PixelFormat.RGB_565; |
| |
| if (format.equals(PIXEL_FORMAT_JPEG)) |
| return PixelFormat.JPEG; |
| |
| return PixelFormat.UNKNOWN; |
| } |
| |
| /** |
| * Sets the orientation of the device in degrees. For example, suppose |
| * the natural position of the device is landscape. If the user takes a |
| * picture in landscape mode in 2048x1536 resolution, the rotation |
| * should be set to 0. If the user rotates the phone 90 degrees |
| * clockwise, the rotation should be set to 90. Applications can use |
| * {@link android.view.OrientationEventListener} to set this parameter. |
| * |
| * The camera driver may set orientation in the EXIF header without |
| * rotating the picture. Or the driver may rotate the picture and |
| * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation |
| * in the EXIF header will be missing or 1 (row #0 is top and column #0 |
| * is left side). |
| * |
| * @param rotation The orientation of the device in degrees. Rotation |
| * can only be 0, 90, 180 or 270. |
| * @throws IllegalArgumentException if rotation value is invalid. |
| * @see android.view.OrientationEventListener |
| */ |
| public void setRotation(int rotation) { |
| if (rotation == 0 || rotation == 90 || rotation == 180 |
| || rotation == 270) { |
| set(KEY_ROTATION, Integer.toString(rotation)); |
| } else { |
| throw new IllegalArgumentException( |
| "Invalid rotation=" + rotation); |
| } |
| } |
| |
| /** |
| * Sets GPS latitude coordinate. This will be stored in JPEG EXIF |
| * header. |
| * |
| * @param latitude GPS latitude coordinate. |
| */ |
| public void setGpsLatitude(double latitude) { |
| set(KEY_GPS_LATITUDE, Double.toString(latitude)); |
| } |
| |
| /** |
| * Sets GPS longitude coordinate. This will be stored in JPEG EXIF |
| * header. |
| * |
| * @param longitude GPS longitude coordinate. |
| */ |
| public void setGpsLongitude(double longitude) { |
| set(KEY_GPS_LONGITUDE, Double.toString(longitude)); |
| } |
| |
| /** |
| * Sets GPS altitude. This will be stored in JPEG EXIF header. |
| * |
| * @param altitude GPS altitude in meters. |
| */ |
| public void setGpsAltitude(double altitude) { |
| set(KEY_GPS_ALTITUDE, Double.toString(altitude)); |
| } |
| |
| /** |
| * Sets GPS timestamp. This will be stored in JPEG EXIF header. |
| * |
| * @param timestamp GPS timestamp (UTC in seconds since January 1, |
| * 1970). |
| */ |
| public void setGpsTimestamp(long timestamp) { |
| set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); |
| } |
| |
| /** |
| * Removes GPS latitude, longitude, altitude, and timestamp from the |
| * parameters. |
| */ |
| public void removeGpsData() { |
| remove(KEY_GPS_LATITUDE); |
| remove(KEY_GPS_LONGITUDE); |
| remove(KEY_GPS_ALTITUDE); |
| remove(KEY_GPS_TIMESTAMP); |
| } |
| |
| /** |
| * Gets the current white balance setting. |
| * |
| * @return one of WHITE_BALANCE_XXX string constant. null if white |
| * balance setting is not supported. |
| */ |
| public String getWhiteBalance() { |
| return get(KEY_WHITE_BALANCE); |
| } |
| |
| /** |
| * Sets the white balance. |
| * |
| * @param value WHITE_BALANCE_XXX string constant. |
| */ |
| public void setWhiteBalance(String value) { |
| set(KEY_WHITE_BALANCE, value); |
| } |
| |
| /** |
| * Gets the supported white balance. |
| * |
| * @return a List of WHITE_BALANCE_XXX string constants. null if white |
| * balance setting is not supported. |
| */ |
| public List<String> getSupportedWhiteBalance() { |
| String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current color effect setting. |
| * |
| * @return one of EFFECT_XXX string constant. null if color effect |
| * setting is not supported. |
| */ |
| public String getColorEffect() { |
| return get(KEY_EFFECT); |
| } |
| |
| /** |
| * Sets the current color effect setting. |
| * |
| * @param value EFFECT_XXX string constants. |
| */ |
| public void setColorEffect(String value) { |
| set(KEY_EFFECT, value); |
| } |
| |
| /** |
| * Gets the supported color effects. |
| * |
| * @return a List of EFFECT_XXX string constants. null if color effect |
| * setting is not supported. |
| */ |
| public List<String> getSupportedColorEffects() { |
| String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| |
| /** |
| * Gets the current antibanding setting. |
| * |
| * @return one of ANTIBANDING_XXX string constant. null if antibanding |
| * setting is not supported. |
| */ |
| public String getAntibanding() { |
| return get(KEY_ANTIBANDING); |
| } |
| |
| /** |
| * Sets the antibanding. |
| * |
| * @param antibanding ANTIBANDING_XXX string constant. |
| */ |
| public void setAntibanding(String antibanding) { |
| set(KEY_ANTIBANDING, antibanding); |
| } |
| |
| /** |
| * Gets the supported antibanding values. |
| * |
| * @return a List of ANTIBANDING_XXX string constants. null if |
| * antibanding setting is not supported. |
| */ |
| public List<String> getSupportedAntibanding() { |
| String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current scene mode setting. |
| * |
| * @return one of SCENE_MODE_XXX string constant. null if scene mode |
| * setting is not supported. |
| */ |
| public String getSceneMode() { |
| return get(KEY_SCENE_MODE); |
| } |
| |
| /** |
| * Sets the scene mode. Other parameters may be changed after changing |
| * scene mode. For example, flash and supported flash mode may be |
| * changed to "off" in night scene mode. After setting scene mode, |
| * applications should call getParameters to know if some parameters are |
| * changed. |
| * |
| * @param value SCENE_MODE_XXX string constants. |
| */ |
| public void setSceneMode(String value) { |
| set(KEY_SCENE_MODE, value); |
| } |
| |
| /** |
| * Gets the supported scene modes. |
| * |
| * @return a List of SCENE_MODE_XXX string constant. null if scene mode |
| * setting is not supported. |
| */ |
| public List<String> getSupportedSceneModes() { |
| String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current flash mode setting. |
| * |
| * @return one of FLASH_MODE_XXX string constant. null if flash mode |
| * setting is not supported. |
| */ |
| public String getFlashMode() { |
| return get(KEY_FLASH_MODE); |
| } |
| |
| /** |
| * Sets the flash mode. |
| * |
| * @param value FLASH_MODE_XXX string constants. |
| */ |
| public void setFlashMode(String value) { |
| set(KEY_FLASH_MODE, value); |
| } |
| |
| /** |
| * Gets the supported flash modes. |
| * |
| * @return a List of FLASH_MODE_XXX string constants. null if flash mode |
| * setting is not supported. |
| */ |
| public List<String> getSupportedFlashModes() { |
| String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current focus mode setting. |
| * |
| * @return one of FOCUS_MODE_XXX string constant. If the camera does not |
| * support auto-focus, this should return {@link |
| * #FOCUS_MODE_FIXED}. If the focus mode is not FOCUS_MODE_FIXED |
| * or {@link #FOCUS_MODE_INFINITY}, applications should call |
| * {@link #autoFocus(AutoFocusCallback)} to start the focus. |
| */ |
| public String getFocusMode() { |
| return get(KEY_FOCUS_MODE); |
| } |
| |
| /** |
| * Sets the focus mode. |
| * |
| * @param value FOCUS_MODE_XXX string constants. |
| */ |
| public void setFocusMode(String value) { |
| set(KEY_FOCUS_MODE, value); |
| } |
| |
| /** |
| * Gets the supported focus modes. |
| * |
| * @return a List of FOCUS_MODE_XXX string constants. null if focus mode |
| * setting is not supported. |
| */ |
| public List<String> getSupportedFocusModes() { |
| String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets current zoom value. This also works when smooth zoom is in |
| * progress. |
| * |
| * @return the current zoom value. The range is 0 to {@link |
| * #getMaxZoom}. |
| * @hide |
| */ |
| public int getZoom() { |
| return getInt("zoom"); |
| } |
| |
| /** |
| * Sets current zoom value. If {@link #startSmoothZoom(int)} has been |
| * called and zoom is not stopped yet, applications should not call this |
| * method. |
| * |
| * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. |
| * @hide |
| */ |
| public void setZoom(int value) { |
| set("zoom", value); |
| } |
| |
| /** |
| * Returns true if zoom is supported. Applications should call this |
| * before using other zoom methods. |
| * |
| * @return true if zoom is supported. |
| * @hide |
| */ |
| public boolean isZoomSupported() { |
| String str = get("zoom-supported"); |
| return "true".equals(str); |
| } |
| |
| /** |
| * Gets the maximum zoom value allowed for snapshot. This is the maximum |
| * value that applications can set to {@link #setZoom(int)}. |
| * |
| * @return the maximum zoom value supported by the camera. |
| * @hide |
| */ |
| public int getMaxZoom() { |
| return getInt("max-zoom"); |
| } |
| |
| /** |
| * Gets the zoom factors of all zoom values. |
| * |
| * @return the zoom factors in 1/100 increments. Ex: a zoom of 3.2x is |
| * returned as 320. Accuracy of the value is dependent on the |
| * hardware implementation. The first element of the list is the |
| * zoom factor of first zoom value. If the first zoom value is |
| * 0, the zoom factor should be 100. The last element is the |
| * zoom factor of zoom value {@link #getMaxZoom}. |
| * @hide |
| */ |
| public List<Integer> getZoomFactors() { |
| return splitInt(get("zoom-factors")); |
| } |
| |
| /** |
| * Returns true if smooth zoom is supported. Applications should call |
| * this before using other smooth zoom methods. |
| * |
| * @return true if smooth zoom is supported. |
| * @hide |
| */ |
| public boolean isSmoothZoomSupported() { |
| String str = get("smooth-zoom-supported"); |
| return "true".equals(str); |
| } |
| |
| // Splits a comma delimited string to an ArrayList of String. |
| // Return null if the passing string is null or the size is 0. |
| private ArrayList<String> split(String str) { |
| if (str == null) return null; |
| |
| // Use StringTokenizer because it is faster than split. |
| StringTokenizer tokenizer = new StringTokenizer(str, ","); |
| ArrayList<String> substrings = new ArrayList<String>(); |
| while (tokenizer.hasMoreElements()) { |
| substrings.add(tokenizer.nextToken()); |
| } |
| return substrings; |
| } |
| |
| // Splits a comma delimited string to an ArrayList of Integer. |
| // Return null if the passing string is null or the size is 0. |
| private ArrayList<Integer> splitInt(String str) { |
| if (str == null) return null; |
| |
| StringTokenizer tokenizer = new StringTokenizer(str, ","); |
| ArrayList<Integer> substrings = new ArrayList<Integer>(); |
| while (tokenizer.hasMoreElements()) { |
| String token = tokenizer.nextToken(); |
| substrings.add(Integer.parseInt(token)); |
| } |
| if (substrings.size() == 0) return null; |
| return substrings; |
| } |
| |
| // Splits a comma delimited string to an ArrayList of Size. |
| // Return null if the passing string is null or the size is 0. |
| private ArrayList<Size> splitSize(String str) { |
| if (str == null) return null; |
| |
| StringTokenizer tokenizer = new StringTokenizer(str, ","); |
| ArrayList<Size> sizeList = new ArrayList<Size>(); |
| while (tokenizer.hasMoreElements()) { |
| Size size = strToSize(tokenizer.nextToken()); |
| if (size != null) sizeList.add(size); |
| } |
| if (sizeList.size() == 0) return null; |
| return sizeList; |
| } |
| |
| // Parses a string (ex: "480x320") to Size object. |
| // Return null if the passing string is null. |
| private Size strToSize(String str) { |
| if (str == null) return null; |
| |
| int pos = str.indexOf('x'); |
| if (pos != -1) { |
| String width = str.substring(0, pos); |
| String height = str.substring(pos + 1); |
| return new Size(Integer.parseInt(width), |
| Integer.parseInt(height)); |
| } |
| Log.e(TAG, "Invalid size parameter string=" + str); |
| return null; |
| } |
| }; |
| } |