| /* |
| * 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.ImageFormat; |
| import android.graphics.Rect; |
| import android.graphics.SurfaceTexture; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| |
| /** |
| * The Camera class is used to set image capture settings, start/stop preview, |
| * snap pictures, and retrieve frames for encoding for video. This class is a |
| * client for the Camera service, which manages the actual camera hardware. |
| * |
| * <p>To access 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 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>To take pictures with this class, use the following steps:</p> |
| * |
| * <ol> |
| * <li>Obtain an instance of Camera from {@link #open(int)}. |
| * |
| * <li>Get existing (default) settings with {@link #getParameters()}. |
| * |
| * <li>If necessary, modify the returned {@link Camera.Parameters} object and call |
| * {@link #setParameters(Camera.Parameters)}. |
| * |
| * <li>If desired, call {@link #setDisplayOrientation(int)}. |
| * |
| * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to |
| * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera |
| * will be unable to start the preview. |
| * |
| * <li><b>Important</b>: Call {@link #startPreview()} to start updating the |
| * preview surface. Preview must be started before you can take a picture. |
| * |
| * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, |
| * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to |
| * capture a photo. Wait for the callbacks to provide the actual image data. |
| * |
| * <li>After taking a picture, preview display will have stopped. To take more |
| * photos, call {@link #startPreview()} again first. |
| * |
| * <li>Call {@link #stopPreview()} to stop updating the preview surface. |
| * |
| * <li><b>Important:</b> Call {@link #release()} to release the camera for |
| * use by other applications. Applications should release the camera |
| * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} |
| * it in {@link android.app.Activity#onResume()}). |
| * </ol> |
| * |
| * <p>To quickly switch to video recording mode, use these steps:</p> |
| * |
| * <ol> |
| * <li>Obtain and initialize a Camera and start preview as described above. |
| * |
| * <li>Call {@link #unlock()} to allow the media process to access the camera. |
| * |
| * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. |
| * See {@link android.media.MediaRecorder} information about video recording. |
| * |
| * <li>When finished recording, call {@link #reconnect()} to re-acquire |
| * and re-lock the camera. |
| * |
| * <li>If desired, restart preview and take more photos or videos. |
| * |
| * <li>Call {@link #stopPreview()} and {@link #release()} as described above. |
| * </ol> |
| * |
| * <p>This class is not thread-safe, and is meant for use from one event thread. |
| * Most long-running operations (preview, focus, photo capture, etc) happen |
| * asynchronously and invoke callbacks as necessary. Callbacks will be invoked |
| * on the event thread {@link #open(int)} was called from. This class's methods |
| * must never be called from multiple threads at once.</p> |
| * |
| * <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/camera/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 OnZoomChangeListener mZoomListener; |
| private ErrorCallback mErrorCallback; |
| private boolean mOneShot; |
| private boolean mWithBuffer; |
| |
| /** |
| * Returns the number of physical cameras available on this device. |
| */ |
| public native static int getNumberOfCameras(); |
| |
| /** |
| * Returns the information about a particular camera. |
| * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. |
| */ |
| public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); |
| |
| /** |
| * Information about a camera |
| */ |
| public static class CameraInfo { |
| /** |
| * The facing of the camera is opposite to that of the screen. |
| */ |
| public static final int CAMERA_FACING_BACK = 0; |
| |
| /** |
| * The facing of the camera is the same as that of the screen. |
| */ |
| public static final int CAMERA_FACING_FRONT = 1; |
| |
| /** |
| * The direction that the camera faces to. It should be |
| * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. |
| */ |
| public int facing; |
| |
| /** |
| * The orientation of the camera image. The value is the angle that the |
| * camera image needs to be rotated clockwise so it shows correctly on |
| * the display in its natural orientation. It should be 0, 90, 180, or 270. |
| * |
| * For example, suppose a device has a naturally tall screen. The |
| * back-facing camera sensor is mounted in landscape. You are looking at |
| * the screen. If the top side of the camera sensor is aligned with the |
| * right edge of the screen in natural orientation, the value should be |
| * 90. If the top side of a front-facing camera sensor is aligned with |
| * the right of the screen, the value should be 270. |
| * |
| * @see #setDisplayOrientation(int) |
| * @see Parameters#setRotation(int) |
| * @see Parameters#setPreviewSize(int, int) |
| * @see Parameters#setPictureSize(int, int) |
| * @see Parameters#setJpegThumbnailSize(int, int) |
| */ |
| public int orientation; |
| }; |
| |
| /** |
| * Creates a new Camera object to access a particular hardware camera. |
| * |
| * <p>You must call {@link #release()} when you are done using the camera, |
| * otherwise it will remain locked and be unavailable to other applications. |
| * |
| * <p>Your application should only have one Camera object active at a time |
| * for a particular hardware camera. |
| * |
| * <p>Callbacks from other methods are delivered to the event loop of the |
| * thread which called open(). If this thread has no event loop, then |
| * callbacks are delivered to the main application event loop. If there |
| * is no main application event loop, callbacks are not delivered. |
| * |
| * <p class="caution"><b>Caution:</b> On some devices, this method may |
| * take a long time to complete. It is best to call this method from a |
| * worker thread (possibly using {@link android.os.AsyncTask}) to avoid |
| * blocking the main application UI thread. |
| * |
| * @param cameraId the hardware camera to access, between 0 and |
| * {@link #getNumberOfCameras()}-1. |
| * @return a new Camera object, connected, locked and ready for use. |
| * @throws RuntimeException if connection to the camera service fails (for |
| * example, if the camera is in use by another process). |
| */ |
| public static Camera open(int cameraId) { |
| return new Camera(cameraId); |
| } |
| |
| /** |
| * Creates a new Camera object to access the first back-facing camera on the |
| * device. If the device does not have a back-facing camera, this returns |
| * null. |
| * @see #open(int) |
| */ |
| public static Camera open() { |
| int numberOfCameras = getNumberOfCameras(); |
| CameraInfo cameraInfo = new CameraInfo(); |
| for (int i = 0; i < numberOfCameras; i++) { |
| getCameraInfo(i, cameraInfo); |
| if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { |
| return new Camera(i); |
| } |
| } |
| return null; |
| } |
| |
| Camera(int cameraId) { |
| mShutterCallback = null; |
| mRawImageCallback = null; |
| mJpegCallback = null; |
| mPreviewCallback = null; |
| mPostviewCallback = null; |
| mZoomListener = 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), cameraId); |
| } |
| |
| protected void finalize() { |
| native_release(); |
| } |
| |
| private native final void native_setup(Object camera_this, int cameraId); |
| private native final void native_release(); |
| |
| |
| /** |
| * Disconnects and releases the Camera object resources. |
| * |
| * <p>You must call this as soon as you're done with the Camera object.</p> |
| */ |
| public final void release() { |
| native_release(); |
| } |
| |
| /** |
| * Unlocks the camera to allow another process to access it. |
| * Normally, the camera is locked to the process with an active Camera |
| * object until {@link #release()} is called. To allow rapid handoff |
| * between processes, you can call this method to release the camera |
| * temporarily for another process to use; once the other process is done |
| * you can call {@link #reconnect()} to reclaim the camera. |
| * |
| * <p>This must be done before calling |
| * {@link android.media.MediaRecorder#setCamera(Camera)}. |
| * |
| * <p>If you are not recording video, you probably do not need this method. |
| * |
| * @throws RuntimeException if the camera cannot be unlocked. |
| */ |
| public native final void unlock(); |
| |
| /** |
| * Re-locks the camera to prevent other processes from accessing it. |
| * Camera objects are locked by default unless {@link #unlock()} is |
| * called. Normally {@link #reconnect()} is used instead. |
| * |
| * <p>If you are not recording video, you probably do not need this method. |
| * |
| * @throws RuntimeException if the camera cannot be re-locked (for |
| * example, if the camera is still in use by another process). |
| */ |
| public native final void lock(); |
| |
| /** |
| * Reconnects to the camera service after another process used it. |
| * After {@link #unlock()} is called, another process may use the |
| * camera; when the process is done, you must reconnect to the camera, |
| * which will re-acquire the lock and allow you to continue using the |
| * camera. |
| * |
| * <p>This must be done after {@link android.media.MediaRecorder} is |
| * done recording if {@link android.media.MediaRecorder#setCamera(Camera)} |
| * was used. |
| * |
| * <p>If you are not recording video, you probably do not need this method. |
| * |
| * @throws IOException if a connection cannot be re-established (for |
| * example, if the camera is still in use by another process). |
| */ |
| public native final void reconnect() throws IOException; |
| |
| /** |
| * Sets the {@link Surface} to be used for live preview. |
| * Either a surface or surface texture is necessary for preview, and |
| * preview is necessary to take pictures. The same surface can be re-set |
| * without harm. Setting a preview surface will un-set any preview surface |
| * texture that was set via {@link #setPreviewTexture}. |
| * |
| * <p>The {@link SurfaceHolder} must already contain a surface when this |
| * method is called. If you are using {@link android.view.SurfaceView}, |
| * you will need to register a {@link SurfaceHolder.Callback} with |
| * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for |
| * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before |
| * calling setPreviewDisplay() or starting preview. |
| * |
| * <p>This method must be called before {@link #startPreview()}. The |
| * one exception is that if the preview surface is not set (or set to null) |
| * before startPreview() is called, then this method may be called once |
| * with a non-null parameter to set the preview surface. (This allows |
| * camera setup and surface creation to happen in parallel, saving time.) |
| * The preview surface may not otherwise change while preview is running. |
| * |
| * @param holder containing the Surface on which to place the preview, |
| * or null to remove the preview surface |
| * @throws IOException if the method fails (for example, if the surface |
| * is unavailable or unsuitable). |
| */ |
| 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) throws IOException; |
| |
| /** |
| * Sets the {@link SurfaceTexture} to be used for live preview. |
| * Either a surface or surface texture is necessary for preview, and |
| * preview is necessary to take pictures. The same surface texture can be |
| * re-set without harm. Setting a preview surface texture will un-set any |
| * preview surface that was set via {@link #setPreviewDisplay}. |
| * |
| * <p>This method must be called before {@link #startPreview()}. The |
| * one exception is that if the preview surface texture is not set (or set |
| * to null) before startPreview() is called, then this method may be called |
| * once with a non-null parameter to set the preview surface. (This allows |
| * camera setup and surface creation to happen in parallel, saving time.) |
| * The preview surface texture may not otherwise change while preview is |
| * running. |
| * |
| * The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a |
| * SurfaceTexture set as the preview texture have an unspecified zero point, |
| * and cannot be directly compared between different cameras or different |
| * instances of the same camera, or across multiple runs of the same |
| * program. |
| * |
| * @param surfaceTexture the {@link SurfaceTexture} to which the preview |
| * images are to be sent or null to remove the current preview surface |
| * texture |
| * @throws IOException if the method fails (for example, if the surface |
| * texture is unavailable or unsuitable). |
| */ |
| public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; |
| |
| /** |
| * Callback interface used to deliver copies of preview frames as |
| * they are displayed. |
| * |
| * @see #setPreviewCallback(Camera.PreviewCallback) |
| * @see #setOneShotPreviewCallback(Camera.PreviewCallback) |
| * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) |
| * @see #startPreview() |
| */ |
| public interface PreviewCallback |
| { |
| /** |
| * Called as preview frames are displayed. This callback is invoked |
| * on the event thread {@link #open(int)} was called from. |
| * |
| * @param data the contents of the preview frame in the format defined |
| * by {@link android.graphics.ImageFormat}, 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); |
| }; |
| |
| /** |
| * Starts capturing and drawing preview frames to the screen. |
| * Preview will not actually start until a surface is supplied |
| * with {@link #setPreviewDisplay(SurfaceHolder)} or |
| * {@link #setPreviewTexture(SurfaceTexture)}. |
| * |
| * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, |
| * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or |
| * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were |
| * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} |
| * will be called when preview data becomes available. |
| */ |
| public native final void startPreview(); |
| |
| /** |
| * Stops capturing and drawing preview frames to the surface, and |
| * resets the camera for a future call to {@link #startPreview()}. |
| */ |
| public native final void stopPreview(); |
| |
| /** |
| * Return current preview state. |
| * |
| * FIXME: Unhide before release |
| * @hide |
| */ |
| public native final boolean previewEnabled(); |
| |
| /** |
| * Installs a callback to be invoked for every preview frame in addition |
| * to displaying them on the screen. The callback will be repeatedly called |
| * for as long as preview is active. This method can be called at any time, |
| * even while preview is live. Any other preview callbacks are overridden. |
| * |
| * @param cb a callback object that receives a copy of each preview frame, |
| * or null to stop receiving callbacks. |
| */ |
| 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 be invoked for the next preview frame in addition |
| * to displaying it on the screen. After one invocation, the callback is |
| * cleared. This method can be called any time, even when preview is live. |
| * Any other preview callbacks are overridden. |
| * |
| * @param cb a callback object that receives a copy of the next preview frame, |
| * or null to stop receiving callbacks. |
| */ |
| 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 to be invoked for every preview frame, using buffers |
| * supplied with {@link #addCallbackBuffer(byte[])}, in addition to |
| * displaying them on the screen. The callback will be repeatedly called |
| * for as long as preview is active and buffers are available. |
| * Any other preview callbacks are overridden. |
| * |
| * <p>The purpose of this method is to improve preview efficiency and frame |
| * rate by allowing preview frame memory reuse. You must call |
| * {@link #addCallbackBuffer(byte[])} at some point -- before or after |
| * calling this method -- or no callbacks will received. |
| * |
| * The buffer queue will be cleared if this method is called with a null |
| * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, |
| * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. |
| * |
| * @param cb a callback object that receives a copy of the preview frame, |
| * or null to stop receiving callbacks and clear the buffer queue. |
| * @see #addCallbackBuffer(byte[]) |
| */ |
| public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { |
| mPreviewCallback = cb; |
| mOneShot = false; |
| mWithBuffer = true; |
| setHasPreviewCallback(cb != null, true); |
| } |
| |
| /** |
| * Adds a pre-allocated buffer to the preview callback buffer queue. |
| * Applications can add one or more buffers to the queue. When a preview |
| * frame arrives and there is still at least one available buffer, the |
| * buffer will be used and removed from the queue. Then preview callback is |
| * invoked with the buffer. If a frame arrives and there is no buffer left, |
| * the frame is discarded. Applications should add buffers back when they |
| * finish processing the data in them. |
| * |
| * <p>The size of the buffer is determined by multiplying the preview |
| * image width, height, and bytes per pixel. The width and height can be |
| * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel |
| * can be computed from |
| * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, |
| * using the image format from {@link Camera.Parameters#getPreviewFormat()}. |
| * |
| * <p>This method is only necessary when |
| * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When |
| * {@link #setPreviewCallback(PreviewCallback)} or |
| * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers |
| * are automatically allocated. When a supplied buffer is too small to |
| * hold the preview frame data, preview callback will return null and |
| * the buffer will be removed from the buffer queue. |
| * |
| * @param callbackBuffer the buffer to add to the queue. |
| * The size should be width * height * bits_per_pixel / 8. |
| * @see #setPreviewCallbackWithBuffer(PreviewCallback) |
| */ |
| public final void addCallbackBuffer(byte[] callbackBuffer) |
| { |
| _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); |
| } |
| |
| /** |
| * Adds a pre-allocated buffer to the raw image callback buffer queue. |
| * Applications can add one or more buffers to the queue. When a raw image |
| * frame arrives and there is still at least one available buffer, the |
| * buffer will be used to hold the raw image data and removed from the |
| * queue. Then raw image callback is invoked with the buffer. If a raw |
| * image frame arrives but there is no buffer left, the frame is |
| * discarded. Applications should add buffers back when they finish |
| * processing the data in them by calling this method again in order |
| * to avoid running out of raw image callback buffers. |
| * |
| * <p>The size of the buffer is determined by multiplying the raw image |
| * width, height, and bytes per pixel. The width and height can be |
| * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel |
| * can be computed from |
| * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, |
| * using the image format from {@link Camera.Parameters#getPreviewFormat()}. |
| * |
| * <p>This method is only necessary when the PictureCallbck for raw image |
| * is used while calling {@link #takePicture(Camera.ShutterCallback, |
| * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. |
| * |
| * Please note that by calling this method, the mode for application-managed |
| * callback buffers is triggered. If this method has never been called, |
| * null will be returned by the raw image callback since there is |
| * no image callback buffer available. Furthermore, When a supplied buffer |
| * is too small to hold the raw image data, raw image callback will return |
| * null and the buffer will be removed from the buffer queue. |
| * |
| * @param callbackBuffer the buffer to add to the raw image callback buffer |
| * queue. The size should be width * height * (bits per pixel) / 8. An |
| * null callbackBuffer will be ignored and won't be added to the queue. |
| * |
| * @see #takePicture(Camera.ShutterCallback, |
| * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. |
| * |
| * {@hide} |
| */ |
| public final void addRawImageCallbackBuffer(byte[] callbackBuffer) |
| { |
| addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); |
| } |
| |
| private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) |
| { |
| // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. |
| if (msgType != CAMERA_MSG_PREVIEW_FRAME && |
| msgType != CAMERA_MSG_RAW_IMAGE) { |
| throw new IllegalArgumentException( |
| "Unsupported message type: " + msgType); |
| } |
| |
| _addCallbackBuffer(callbackBuffer, msgType); |
| } |
| |
| private native final void _addCallbackBuffer( |
| byte[] callbackBuffer, int msgType); |
| |
| 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 (mZoomListener != null) { |
| mZoomListener.onZoomChange(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); |
| } |
| } |
| |
| /** |
| * Callback interface used to notify on completion of 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> |
| * |
| * @see #autoFocus(AutoFocusCallback) |
| */ |
| public interface AutoFocusCallback |
| { |
| /** |
| * Called when the camera auto focus completes. If the camera |
| * does not support auto-focus and autoFocus is called, |
| * onAutoFocus will be called immediately with a fake value of |
| * <code>success</code> set to <code>true</code>. |
| * |
| * @param success true if focus was successful, false if otherwise |
| * @param camera the Camera service object |
| */ |
| void onAutoFocus(boolean success, Camera camera); |
| }; |
| |
| /** |
| * Starts camera auto-focus and registers a callback function to run when |
| * the camera is focused. This method is only valid when preview is active |
| * (between {@link #startPreview()} and before {@link #stopPreview()}). |
| * |
| * <p>Callers should check |
| * {@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 and camera hardware.<p> |
| * |
| * @param cb the callback to run |
| * @see #cancelAutoFocus() |
| */ |
| public final void autoFocus(AutoFocusCallback cb) |
| { |
| mAutoFocusCallback = cb; |
| native_autoFocus(); |
| } |
| private native final void native_autoFocus(); |
| |
| /** |
| * Cancels any auto-focus function in progress. |
| * Whether or not auto-focus is currently in progress, |
| * this function will return the focus position to the default. |
| * If the camera does not support auto-focus, this is a no-op. |
| * |
| * @see #autoFocus(Camera.AutoFocusCallback) |
| */ |
| public final void cancelAutoFocus() |
| { |
| mAutoFocusCallback = null; |
| native_cancelAutoFocus(); |
| } |
| private native final void native_cancelAutoFocus(); |
| |
| /** |
| * Callback interface used to signal the moment of actual image capture. |
| * |
| * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) |
| */ |
| public interface ShutterCallback |
| { |
| /** |
| * Called as near as possible to the moment when a photo is captured |
| * from the sensor. This is a good opportunity to play a shutter sound |
| * or give other feedback of camera operation. This may be some time |
| * after the photo was triggered, but some time before the actual data |
| * is available. |
| */ |
| void onShutter(); |
| } |
| |
| /** |
| * Callback interface used to supply image data from a photo capture. |
| * |
| * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) |
| */ |
| public interface PictureCallback { |
| /** |
| * Called when image data is available after a picture is taken. |
| * The format of the data depends on the context of the callback |
| * and {@link Camera.Parameters} settings. |
| * |
| * @param data a byte array of the picture data |
| * @param camera the Camera service object |
| */ |
| void onPictureTaken(byte[] data, Camera camera); |
| }; |
| |
| /** |
| * Equivalent to takePicture(shutter, raw, null, jpeg). |
| * |
| * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) |
| */ |
| public final void takePicture(ShutterCallback shutter, PictureCallback raw, |
| PictureCallback jpeg) { |
| takePicture(shutter, raw, null, jpeg); |
| } |
| private native final void native_takePicture(int msgType); |
| |
| /** |
| * 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 |
| * will be null if there is no raw image callback buffer available or the |
| * raw image callback buffer is not large enough to hold the raw image). |
| * 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. |
| * |
| * <p>This method is only valid when preview is active (after |
| * {@link #startPreview()}). Preview will be stopped after the image is |
| * taken; callers must call {@link #startPreview()} again if they want to |
| * re-start preview or take more pictures. |
| * |
| * <p>After calling this method, you must not call {@link #startPreview()} |
| * or take another picture until the JPEG callback has returned. |
| * |
| * @param shutter the callback for image capture moment, or null |
| * @param raw the callback for raw (uncompressed) image data, or null |
| * @param postview callback with postview image data, may be null |
| * @param jpeg the callback for JPEG image data, or null |
| * |
| * @see #addRawImageCallbackBuffer(byte[]) |
| */ |
| public final void takePicture(ShutterCallback shutter, PictureCallback raw, |
| PictureCallback postview, PictureCallback jpeg) { |
| mShutterCallback = shutter; |
| mRawImageCallback = raw; |
| mPostviewCallback = postview; |
| mJpegCallback = jpeg; |
| |
| // If callback is not set, do not send me callbacks. |
| int msgType = 0; |
| if (mShutterCallback != null) { |
| msgType |= CAMERA_MSG_SHUTTER; |
| } |
| if (mRawImageCallback != null) { |
| msgType |= CAMERA_MSG_RAW_IMAGE; |
| } |
| if (mPostviewCallback != null) { |
| msgType |= CAMERA_MSG_POSTVIEW_FRAME; |
| } |
| if (mJpegCallback != null) { |
| msgType |= CAMERA_MSG_COMPRESSED_IMAGE; |
| } |
| |
| native_takePicture(msgType); |
| } |
| |
| /** |
| * Zooms to the requested value smoothly. The driver will notify {@link |
| * OnZoomChangeListener} of the zoom value and whether zoom is stopped at |
| * the time. For example, suppose the current zoom is 0 and startSmoothZoom |
| * is called with value 3. The |
| * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} |
| * method will be called three times with zoom values 1, 2, and 3. |
| * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. |
| * Applications should not call startSmoothZoom again or change the zoom |
| * value before zoom stops. If the supplied zoom value equals to the current |
| * zoom value, no zoom callback will be generated. This method is supported |
| * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} |
| * returns true. |
| * |
| * @param value zoom value. The valid range is 0 to {@link |
| * android.hardware.Camera.Parameters#getMaxZoom}. |
| * @throws IllegalArgumentException if the zoom value is invalid. |
| * @throws RuntimeException if the method fails. |
| * @see #setZoomChangeListener(OnZoomChangeListener) |
| */ |
| public native final void startSmoothZoom(int value); |
| |
| /** |
| * Stops the smooth zoom. Applications should wait for the {@link |
| * OnZoomChangeListener} to know when the zoom is actually stopped. This |
| * method is supported if {@link |
| * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. |
| * |
| * @throws RuntimeException if the method fails. |
| */ |
| public native final void stopSmoothZoom(); |
| |
| /** |
| * Set the clockwise rotation of preview display in degrees. This affects |
| * the preview frames and the picture displayed after snapshot. This method |
| * is useful for portrait mode applications. Note that preview display of |
| * front-facing cameras is flipped horizontally before the rotation, that |
| * is, the image is reflected along the central vertical axis of the camera |
| * sensor. So the users can see themselves as looking into a mirror. |
| * |
| * <p>This does not affect the order of byte array passed in {@link |
| * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This |
| * method is not allowed to be called during preview. |
| * |
| * <p>If you want to make the camera image show in the same orientation as |
| * the display, you can use the following code. |
| * <pre> |
| * public static void setCameraDisplayOrientation(Activity activity, |
| * int cameraId, android.hardware.Camera camera) { |
| * android.hardware.Camera.CameraInfo info = |
| * new android.hardware.Camera.CameraInfo(); |
| * android.hardware.Camera.getCameraInfo(cameraId, info); |
| * int rotation = activity.getWindowManager().getDefaultDisplay() |
| * .getRotation(); |
| * int degrees = 0; |
| * switch (rotation) { |
| * case Surface.ROTATION_0: degrees = 0; break; |
| * case Surface.ROTATION_90: degrees = 90; break; |
| * case Surface.ROTATION_180: degrees = 180; break; |
| * case Surface.ROTATION_270: degrees = 270; break; |
| * } |
| * |
| * int result; |
| * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { |
| * result = (info.orientation + degrees) % 360; |
| * result = (360 - result) % 360; // compensate the mirror |
| * } else { // back-facing |
| * result = (info.orientation - degrees + 360) % 360; |
| * } |
| * camera.setDisplayOrientation(result); |
| * } |
| * </pre> |
| * @param degrees the angle that the picture will be rotated clockwise. |
| * Valid values are 0, 90, 180, and 270. The starting |
| * position is 0 (landscape). |
| * @see #setPreviewDisplay(SurfaceHolder) |
| */ |
| public native final void setDisplayOrientation(int degrees); |
| |
| /** |
| * Callback interface for zoom changes during a smooth zoom operation. |
| * |
| * @see #setZoomChangeListener(OnZoomChangeListener) |
| * @see #startSmoothZoom(int) |
| */ |
| public interface OnZoomChangeListener |
| { |
| /** |
| * Called when the zoom value has changed during a smooth zoom. |
| * |
| * @param zoomValue the current zoom value. In smooth zoom mode, camera |
| * calls this 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 |
| */ |
| void onZoomChange(int zoomValue, boolean stopped, Camera camera); |
| }; |
| |
| /** |
| * Registers a listener to be notified when the zoom value is updated by the |
| * camera driver during smooth zoom. |
| * |
| * @param listener the listener to notify |
| * @see #startSmoothZoom(int) |
| */ |
| public final void setZoomChangeListener(OnZoomChangeListener listener) |
| { |
| mZoomListener = listener; |
| } |
| |
| // Error codes match the enum in include/ui/Camera.h |
| |
| /** |
| * Unspecified camera error. |
| * @see Camera.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 Camera.ErrorCallback |
| */ |
| public static final int CAMERA_ERROR_SERVER_DIED = 100; |
| |
| /** |
| * Callback interface for camera error notification. |
| * |
| * @see #setErrorCallback(ErrorCallback) |
| */ |
| 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(); |
| |
| /** |
| * Changes the settings for this Camera service. |
| * |
| * @param params the Parameters to use for this Camera service |
| * @throws RuntimeException if any parameter is invalid or not supported. |
| * @see #getParameters() |
| */ |
| public void setParameters(Parameters params) { |
| native_setParameters(params.flatten()); |
| } |
| |
| /** |
| * Returns the current settings for this Camera service. |
| * If modifications are made to the returned Parameters, they must be passed |
| * to {@link #setParameters(Camera.Parameters)} to take effect. |
| * |
| * @see #setParameters(Camera.Parameters) |
| */ |
| public Parameters getParameters() { |
| Parameters p = new Parameters(); |
| String s = native_getParameters(); |
| p.unflatten(s); |
| return p; |
| } |
| |
| /** |
| * Image size (width and height 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; |
| } |
| /** |
| * Compares {@code obj} to this size. |
| * |
| * @param obj the object to compare this size with. |
| * @return {@code true} if the width and height of {@code obj} is the |
| * same as those of this size. {@code false} otherwise. |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof Size)) { |
| return false; |
| } |
| Size s = (Size) obj; |
| return width == s.width && height == s.height; |
| } |
| @Override |
| public int hashCode() { |
| return width * 32713 + height; |
| } |
| /** width of the picture */ |
| public int width; |
| /** height of the picture */ |
| public int height; |
| }; |
| |
| /** |
| * Area class for focus. |
| * |
| * @see #setFocusAreas(List) |
| * @see #getFocusAreas() |
| */ |
| public static class Area { |
| /** |
| * Create an area with specified rectangle and weight. |
| * |
| * @param rect the rectangle of the area |
| * @param weight the weight of the area |
| */ |
| public Area(Rect rect, int weight) { |
| this.rect = rect; |
| this.weight = weight; |
| } |
| /** |
| * Compares {@code obj} to this area. |
| * |
| * @param obj the object to compare this area with. |
| * @return {@code true} if the rectangle and weight of {@code obj} is |
| * the same as those of this area. {@code false} otherwise. |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof Area)) { |
| return false; |
| } |
| Area a = (Area) obj; |
| if (rect == null) { |
| if (a.rect != null) return false; |
| } else { |
| if (!rect.equals(a.rect)) return false; |
| } |
| return weight == a.weight; |
| } |
| |
| /** rectangle of the area */ |
| public Rect rect; |
| |
| /** weight of the area */ |
| public int weight; |
| }; |
| |
| /** |
| * Camera service settings. |
| * |
| * <p>To make camera parameters take effect, applications have to call |
| * {@link Camera#setParameters(Camera.Parameters)}. For example, after |
| * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not |
| * actually changed until {@link Camera#setParameters(Camera.Parameters)} |
| * is called with the changed parameters object. |
| * |
| * <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 {@link Camera.Parameters#getSupportedColorEffects()} before |
| * calling {@link Camera.Parameters#setColorEffect(String)}. If the |
| * camera does not support color effects, |
| * {@link Camera.Parameters#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_PREVIEW_FPS_RANGE = "preview-fps-range"; |
| 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_SIZE = "jpeg-thumbnail-size"; |
| 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_GPS_PROCESSING_METHOD = "gps-processing-method"; |
| 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"; |
| private static final String KEY_FOCUS_AREAS = "focus-areas"; |
| private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; |
| private static final String KEY_FOCAL_LENGTH = "focal-length"; |
| private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; |
| private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; |
| private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; |
| private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; |
| private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; |
| private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; |
| private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; |
| private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; |
| private static final String KEY_METERING_AREAS = "metering-areas"; |
| private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; |
| private static final String KEY_ZOOM = "zoom"; |
| private static final String KEY_MAX_ZOOM = "max-zoom"; |
| private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; |
| private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; |
| private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; |
| private static final String KEY_FOCUS_DISTANCES = "focus-distances"; |
| private static final String KEY_VIDEO_SIZE = "video-size"; |
| private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = |
| "preferred-preview-size-for-video"; |
| |
| // Parameter key suffix for supported values. |
| private static final String SUPPORTED_VALUES_SUFFIX = "-values"; |
| |
| private static final String TRUE = "true"; |
| private static final String FALSE = "false"; |
| |
| // 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"; |
| |
| /** |
| * Scene mode is off. |
| */ |
| public static final String SCENE_MODE_AUTO = "auto"; |
| |
| /** |
| * Take photos of fast moving objects. Same as {@link |
| * #SCENE_MODE_SPORTS}. |
| */ |
| public static final String SCENE_MODE_ACTION = "action"; |
| |
| /** |
| * Take people pictures. |
| */ |
| public static final String SCENE_MODE_PORTRAIT = "portrait"; |
| |
| /** |
| * Take pictures on distant objects. |
| */ |
| public static final String SCENE_MODE_LANDSCAPE = "landscape"; |
| |
| /** |
| * Take photos at night. |
| */ |
| public static final String SCENE_MODE_NIGHT = "night"; |
| |
| /** |
| * Take people pictures at night. |
| */ |
| public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; |
| |
| /** |
| * Take photos in a theater. Flash light is off. |
| */ |
| public static final String SCENE_MODE_THEATRE = "theatre"; |
| |
| /** |
| * Take pictures on the beach. |
| */ |
| public static final String SCENE_MODE_BEACH = "beach"; |
| |
| /** |
| * Take pictures on the snow. |
| */ |
| public static final String SCENE_MODE_SNOW = "snow"; |
| |
| /** |
| * Take sunset photos. |
| */ |
| public static final String SCENE_MODE_SUNSET = "sunset"; |
| |
| /** |
| * Avoid blurry pictures (for example, due to hand shake). |
| */ |
| public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; |
| |
| /** |
| * For shooting firework displays. |
| */ |
| public static final String SCENE_MODE_FIREWORKS = "fireworks"; |
| |
| /** |
| * Take photos of fast moving objects. Same as {@link |
| * #SCENE_MODE_ACTION}. |
| */ |
| public static final String SCENE_MODE_SPORTS = "sports"; |
| |
| /** |
| * Take indoor low-light shot. |
| */ |
| public static final String SCENE_MODE_PARTY = "party"; |
| |
| /** |
| * Capture the naturally warm color of scenes lit by candles. |
| */ |
| public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; |
| |
| /** |
| * Applications are looking for a barcode. Camera driver will be |
| * optimized for barcode reading. |
| */ |
| public static final String SCENE_MODE_BARCODE = "barcode"; |
| |
| /** |
| * Auto-focus mode. Applications should call {@link |
| * #autoFocus(AutoFocusCallback)} to start the focus in this 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"; |
| |
| /** |
| * Macro (close-up) focus mode. Applications should call |
| * {@link #autoFocus(AutoFocusCallback)} to start the focus in this |
| * mode. |
| */ |
| 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"; |
| |
| /** |
| * Extended depth of field (EDOF). Focusing is done digitally and |
| * continuously. Applications should not call {@link |
| * #autoFocus(AutoFocusCallback)} in this mode. |
| */ |
| public static final String FOCUS_MODE_EDOF = "edof"; |
| |
| /** |
| * Continuous auto focus mode intended for video recording. The camera |
| * continuously tries to focus. This is ideal for shooting video. |
| * Applications still can call {@link |
| * #takePicture(Camera.ShutterCallback, Camera.PictureCallback, |
| * Camera.PictureCallback)} in this mode but the subject may not be in |
| * focus. Auto focus starts when the parameter is set. Applications |
| * should not call {@link #autoFocus(AutoFocusCallback)} in this mode. |
| * To stop continuous focus, applications should change the focus mode |
| * to other modes. |
| */ |
| public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; |
| |
| // Indices for focus distance array. |
| /** |
| * The array index of near focus distance for use with |
| * {@link #getFocusDistances(float[])}. |
| */ |
| public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; |
| |
| /** |
| * The array index of optimal focus distance for use with |
| * {@link #getFocusDistances(float[])}. |
| */ |
| public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; |
| |
| /** |
| * The array index of far focus distance for use with |
| * {@link #getFocusDistances(float[])}. |
| */ |
| public static final int FOCUS_DISTANCE_FAR_INDEX = 2; |
| |
| /** |
| * The array index of minimum preview fps for use with {@link |
| * #getPreviewFpsRange(int[])} or {@link |
| * #getSupportedPreviewFpsRange()}. |
| */ |
| public static final int PREVIEW_FPS_MIN_INDEX = 0; |
| |
| /** |
| * The array index of maximum preview fps for use with {@link |
| * #getPreviewFpsRange(int[])} or {@link |
| * #getSupportedPreviewFpsRange()}. |
| */ |
| public static final int PREVIEW_FPS_MAX_INDEX = 1; |
| |
| // 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_YUV420P = "yuv420p"; |
| 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)); |
| } |
| |
| private void set(String key, List<Area> areas) { |
| if (areas == null) { |
| set(key, "(0,0,0,0,0)"); |
| } else { |
| StringBuilder buffer = new StringBuilder(); |
| for (int i = 0; i < areas.size(); i++) { |
| Area area = areas.get(i); |
| Rect rect = area.rect; |
| buffer.append('('); |
| buffer.append(rect.left); |
| buffer.append(','); |
| buffer.append(rect.top); |
| buffer.append(','); |
| buffer.append(rect.right); |
| buffer.append(','); |
| buffer.append(rect.bottom); |
| buffer.append(','); |
| buffer.append(area.weight); |
| buffer.append(')'); |
| if (i != areas.size() - 1) buffer.append(','); |
| } |
| set(key, buffer.toString()); |
| } |
| } |
| |
| /** |
| * 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. If the preview has already |
| * started, applications should stop the preview first before changing |
| * preview size. |
| * |
| * The sides of width and height are based on camera orientation. That |
| * is, the preview size is the size before it is rotated by display |
| * orientation. So applications need to consider the display orientation |
| * while setting preview size. For example, suppose the camera supports |
| * both 480x320 and 320x480 preview sizes. The application wants a 3:2 |
| * preview ratio. If the display orientation is set to 0 or 180, preview |
| * size should be set to 480x320. If the display orientation is set to |
| * 90 or 270, preview size should be set to 320x480. The display |
| * orientation should also be considered while setting picture size and |
| * thumbnail size. |
| * |
| * @param width the width of the pictures, in pixels |
| * @param height the height of the pictures, in pixels |
| * @see #setDisplayOrientation(int) |
| * @see #getCameraInfo(int, CameraInfo) |
| * @see #setPictureSize(int, int) |
| * @see #setJpegThumbnailSize(int, int) |
| */ |
| 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 width and height 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. This method will always return a list |
| * with at least one element. |
| */ |
| public List<Size> getSupportedPreviewSizes() { |
| String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); |
| return splitSize(str); |
| } |
| |
| /** |
| * Gets the supported video frame sizes that can be used by |
| * MediaRecorder. |
| * |
| * If the returned list is not null, the returned list will contain at |
| * least one Size and one of the sizes in the returned list must be |
| * passed to MediaRecorder.setVideoSize() for camcorder application if |
| * camera is used as the video source. In this case, the size of the |
| * preview can be different from the resolution of the recorded video |
| * during video recording. |
| * |
| * @return a list of Size object if camera has separate preview and |
| * video output; otherwise, null is returned. |
| * @see #getPreferredPreviewSizeForVideo() |
| */ |
| public List<Size> getSupportedVideoSizes() { |
| String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); |
| return splitSize(str); |
| } |
| |
| /** |
| * Returns the preferred or recommended preview size (width and height) |
| * in pixels for video recording. Camcorder applications should |
| * set the preview size to a value that is not larger than the |
| * preferred preview size. In other words, the product of the width |
| * and height of the preview size should not be larger than that of |
| * the preferred preview size. In addition, we recommend to choose a |
| * preview size that has the same aspect ratio as the resolution of |
| * video to be recorded. |
| * |
| * @return the preferred preview size (width and height) in pixels for |
| * video recording if getSupportedVideoSizes() does not return |
| * null; otherwise, null is returned. |
| * @see #getSupportedVideoSizes() |
| */ |
| public Size getPreferredPreviewSizeForVideo() { |
| String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); |
| return strToSize(pair); |
| } |
| |
| /** |
| * Sets the dimensions for EXIF thumbnail in Jpeg picture. If |
| * applications set both width and height to 0, EXIF will not contain |
| * thumbnail. |
| * |
| * Applications need to consider the display orientation. See {@link |
| * #setPreviewSize(int,int)} for reference. |
| * |
| * @param width the width of the thumbnail, in pixels |
| * @param height the height of the thumbnail, in pixels |
| * @see #setPreviewSize(int,int) |
| */ |
| 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)); |
| } |
| |
| /** |
| * Gets the supported jpeg thumbnail sizes. |
| * |
| * @return a list of Size object. This method will always return a list |
| * with at least two elements. Size 0,0 (no thumbnail) is always |
| * supported. |
| */ |
| public List<Size> getSupportedJpegThumbnailSizes() { |
| String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); |
| return splitSize(str); |
| } |
| |
| /** |
| * 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. This is the |
| * target frame rate. The actual frame rate depends on the driver. |
| * |
| * @param fps the frame rate (frames per second) |
| * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} |
| */ |
| @Deprecated |
| public void setPreviewFrameRate(int fps) { |
| set(KEY_PREVIEW_FRAME_RATE, fps); |
| } |
| |
| /** |
| * Returns the setting for the rate at which preview frames are |
| * received. This is the target frame rate. The actual frame rate |
| * depends on the driver. |
| * |
| * @return the frame rate setting (frames per second) |
| * @deprecated replaced by {@link #getPreviewFpsRange(int[])} |
| */ |
| @Deprecated |
| public int getPreviewFrameRate() { |
| return getInt(KEY_PREVIEW_FRAME_RATE); |
| } |
| |
| /** |
| * Gets the supported preview frame rates. |
| * |
| * @return a list of supported preview frame rates. null if preview |
| * frame rate setting is not supported. |
| * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} |
| */ |
| @Deprecated |
| public List<Integer> getSupportedPreviewFrameRates() { |
| String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); |
| return splitInt(str); |
| } |
| |
| /** |
| * Sets the maximum and maximum preview fps. This controls the rate of |
| * preview frames received in {@link PreviewCallback}. The minimum and |
| * maximum preview fps must be one of the elements from {@link |
| * #getSupportedPreviewFpsRange}. |
| * |
| * @param min the minimum preview fps (scaled by 1000). |
| * @param max the maximum preview fps (scaled by 1000). |
| * @throws RuntimeException if fps range is invalid. |
| * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) |
| * @see #getSupportedPreviewFpsRange() |
| */ |
| public void setPreviewFpsRange(int min, int max) { |
| set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); |
| } |
| |
| /** |
| * Returns the current minimum and maximum preview fps. The values are |
| * one of the elements returned by {@link #getSupportedPreviewFpsRange}. |
| * |
| * @return range the minimum and maximum preview fps (scaled by 1000). |
| * @see #PREVIEW_FPS_MIN_INDEX |
| * @see #PREVIEW_FPS_MAX_INDEX |
| * @see #getSupportedPreviewFpsRange() |
| */ |
| public void getPreviewFpsRange(int[] range) { |
| if (range == null || range.length != 2) { |
| throw new IllegalArgumentException( |
| "range must be an array with two elements."); |
| } |
| splitInt(get(KEY_PREVIEW_FPS_RANGE), range); |
| } |
| |
| /** |
| * Gets the supported preview fps (frame-per-second) ranges. Each range |
| * contains a minimum fps and maximum fps. If minimum fps equals to |
| * maximum fps, the camera outputs frames in fixed frame rate. If not, |
| * the camera outputs frames in auto frame rate. The actual frame rate |
| * fluctuates between the minimum and the maximum. The values are |
| * multiplied by 1000 and represented in integers. For example, if frame |
| * rate is 26.623 frames per second, the value is 26623. |
| * |
| * @return a list of supported preview fps ranges. This method returns a |
| * list with at least one element. Every element is an int array |
| * of two values - minimum fps and maximum fps. The list is |
| * sorted from small to large (first by maximum fps and then |
| * minimum fps). |
| * @see #PREVIEW_FPS_MIN_INDEX |
| * @see #PREVIEW_FPS_MAX_INDEX |
| */ |
| public List<int[]> getSupportedPreviewFpsRange() { |
| String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); |
| return splitRange(str); |
| } |
| |
| /** |
| * Sets the image format for preview pictures. |
| * <p>If this is never called, the default format will be |
| * {@link android.graphics.ImageFormat#NV21}, which |
| * uses the NV21 encoding format.</p> |
| * |
| * @param pixel_format the desired preview picture format, defined |
| * by one of the {@link android.graphics.ImageFormat} constants. |
| * (E.g., <var>ImageFormat.NV21</var> (default), |
| * <var>ImageFormat.RGB_565</var>, or |
| * <var>ImageFormat.JPEG</var>) |
| * @see android.graphics.ImageFormat |
| */ |
| 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 frames got from |
| * {@link PreviewCallback}. |
| * |
| * @return the preview format. |
| * @see android.graphics.ImageFormat |
| */ |
| public int getPreviewFormat() { |
| return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); |
| } |
| |
| /** |
| * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} |
| * is always supported. {@link android.graphics.ImageFormat#YV12} |
| * is always supported since API level 12. |
| * |
| * @return a list of supported preview formats. This method will always |
| * return a list with at least one element. |
| * @see android.graphics.ImageFormat |
| */ |
| 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 == ImageFormat.UNKNOWN) continue; |
| formats.add(f); |
| } |
| return formats; |
| } |
| |
| /** |
| * Sets the dimensions for pictures. |
| * |
| * Applications need to consider the display orientation. See {@link |
| * #setPreviewSize(int,int)} for reference. |
| * |
| * @param width the width for pictures, in pixels |
| * @param height the height for pictures, in pixels |
| * @see #setPreviewSize(int,int) |
| * |
| */ |
| 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 supported picture sizes. This method will always |
| * return a list with at least one element. |
| */ |
| 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>ImageFormat.NV21</var>, |
| * <var>ImageFormat.RGB_565</var>, or |
| * <var>ImageFormat.JPEG</var>) |
| * @see android.graphics.ImageFormat |
| */ |
| 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 picture format |
| * @see android.graphics.ImageFormat |
| */ |
| public int getPictureFormat() { |
| return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); |
| } |
| |
| /** |
| * Gets the supported picture formats. |
| * |
| * @return supported picture formats. This method will always return a |
| * list with at least one element. |
| * @see android.graphics.ImageFormat |
| */ |
| public List<Integer> getSupportedPictureFormats() { |
| String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); |
| ArrayList<Integer> formats = new ArrayList<Integer>(); |
| for (String s : split(str)) { |
| int f = pixelFormatForCameraFormat(s); |
| if (f == ImageFormat.UNKNOWN) continue; |
| formats.add(f); |
| } |
| return formats; |
| } |
| |
| private String cameraFormatForPixelFormat(int pixel_format) { |
| switch(pixel_format) { |
| case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; |
| case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; |
| case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; |
| case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; |
| case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; |
| case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; |
| default: return null; |
| } |
| } |
| |
| private int pixelFormatForCameraFormat(String format) { |
| if (format == null) |
| return ImageFormat.UNKNOWN; |
| |
| if (format.equals(PIXEL_FORMAT_YUV422SP)) |
| return ImageFormat.NV16; |
| |
| if (format.equals(PIXEL_FORMAT_YUV420SP)) |
| return ImageFormat.NV21; |
| |
| if (format.equals(PIXEL_FORMAT_YUV422I)) |
| return ImageFormat.YUY2; |
| |
| if (format.equals(PIXEL_FORMAT_YUV420P)) |
| return ImageFormat.YV12; |
| |
| if (format.equals(PIXEL_FORMAT_RGB565)) |
| return ImageFormat.RGB_565; |
| |
| if (format.equals(PIXEL_FORMAT_JPEG)) |
| return ImageFormat.JPEG; |
| |
| return ImageFormat.UNKNOWN; |
| } |
| |
| /** |
| * Sets the rotation angle in degrees relative to the orientation of |
| * the camera. This affects the pictures returned from JPEG {@link |
| * PictureCallback}. 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). |
| * |
| * <p>If applications want to rotate the picture to match the orientation |
| * of what users see, apps should use {@link |
| * android.view.OrientationEventListener} and {@link CameraInfo}. |
| * The value from OrientationEventListener is relative to the natural |
| * orientation of the device. CameraInfo.orientation is the angle |
| * between camera orientation and natural device orientation. The sum |
| * of the two is the rotation angle for back-facing camera. The |
| * difference of the two is the rotation angle for front-facing camera. |
| * Note that the JPEG pictures of front-facing cameras are not mirrored |
| * as in preview display. |
| * |
| * <p>For example, suppose the natural orientation of the device is |
| * portrait. The device is rotated 270 degrees clockwise, so the device |
| * orientation is 270. Suppose a back-facing camera sensor is mounted in |
| * landscape and the top side of the camera sensor is aligned with the |
| * right edge of the display in natural orientation. So the camera |
| * orientation is 90. The rotation should be set to 0 (270 + 90). |
| * |
| * <p>The reference code is as follows. |
| * |
| * <pre> |
| * public void public void onOrientationChanged(int orientation) { |
| * if (orientation == ORIENTATION_UNKNOWN) return; |
| * android.hardware.Camera.CameraInfo info = |
| * new android.hardware.Camera.CameraInfo(); |
| * android.hardware.Camera.getCameraInfo(cameraId, info); |
| * orientation = (orientation + 45) / 90 * 90; |
| * int rotation = 0; |
| * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { |
| * rotation = (info.orientation - orientation + 360) % 360; |
| * } else { // back-facing camera |
| * rotation = (info.orientation + orientation) % 360; |
| * } |
| * mParameters.setRotation(rotation); |
| * } |
| * </pre> |
| * |
| * @param rotation The rotation angle in degrees relative to the |
| * orientation of the camera. Rotation can only be 0, |
| * 90, 180 or 270. |
| * @throws IllegalArgumentException if rotation value is invalid. |
| * @see android.view.OrientationEventListener |
| * @see #getCameraInfo(int, CameraInfo) |
| */ |
| 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)); |
| } |
| |
| /** |
| * Sets GPS processing method. It will store up to 32 characters |
| * in JPEG EXIF header. |
| * |
| * @param processing_method The processing method to get this location. |
| */ |
| public void setGpsProcessingMethod(String processing_method) { |
| set(KEY_GPS_PROCESSING_METHOD, processing_method); |
| } |
| |
| /** |
| * 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); |
| remove(KEY_GPS_PROCESSING_METHOD); |
| } |
| |
| /** |
| * Gets the current white balance setting. |
| * |
| * @return current white balance. null if white balance setting is not |
| * supported. |
| * @see #WHITE_BALANCE_AUTO |
| * @see #WHITE_BALANCE_INCANDESCENT |
| * @see #WHITE_BALANCE_FLUORESCENT |
| * @see #WHITE_BALANCE_WARM_FLUORESCENT |
| * @see #WHITE_BALANCE_DAYLIGHT |
| * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT |
| * @see #WHITE_BALANCE_TWILIGHT |
| * @see #WHITE_BALANCE_SHADE |
| * |
| */ |
| public String getWhiteBalance() { |
| return get(KEY_WHITE_BALANCE); |
| } |
| |
| /** |
| * Sets the white balance. |
| * |
| * @param value new white balance. |
| * @see #getWhiteBalance() |
| */ |
| public void setWhiteBalance(String value) { |
| set(KEY_WHITE_BALANCE, value); |
| } |
| |
| /** |
| * Gets the supported white balance. |
| * |
| * @return a list of supported white balance. null if white balance |
| * setting is not supported. |
| * @see #getWhiteBalance() |
| */ |
| public List<String> getSupportedWhiteBalance() { |
| String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current color effect setting. |
| * |
| * @return current color effect. null if color effect |
| * setting is not supported. |
| * @see #EFFECT_NONE |
| * @see #EFFECT_MONO |
| * @see #EFFECT_NEGATIVE |
| * @see #EFFECT_SOLARIZE |
| * @see #EFFECT_SEPIA |
| * @see #EFFECT_POSTERIZE |
| * @see #EFFECT_WHITEBOARD |
| * @see #EFFECT_BLACKBOARD |
| * @see #EFFECT_AQUA |
| */ |
| public String getColorEffect() { |
| return get(KEY_EFFECT); |
| } |
| |
| /** |
| * Sets the current color effect setting. |
| * |
| * @param value new color effect. |
| * @see #getColorEffect() |
| */ |
| public void setColorEffect(String value) { |
| set(KEY_EFFECT, value); |
| } |
| |
| /** |
| * Gets the supported color effects. |
| * |
| * @return a list of supported color effects. null if color effect |
| * setting is not supported. |
| * @see #getColorEffect() |
| */ |
| public List<String> getSupportedColorEffects() { |
| String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| |
| /** |
| * Gets the current antibanding setting. |
| * |
| * @return current antibanding. null if antibanding setting is not |
| * supported. |
| * @see #ANTIBANDING_AUTO |
| * @see #ANTIBANDING_50HZ |
| * @see #ANTIBANDING_60HZ |
| * @see #ANTIBANDING_OFF |
| */ |
| public String getAntibanding() { |
| return get(KEY_ANTIBANDING); |
| } |
| |
| /** |
| * Sets the antibanding. |
| * |
| * @param antibanding new antibanding value. |
| * @see #getAntibanding() |
| */ |
| public void setAntibanding(String antibanding) { |
| set(KEY_ANTIBANDING, antibanding); |
| } |
| |
| /** |
| * Gets the supported antibanding values. |
| * |
| * @return a list of supported antibanding values. null if antibanding |
| * setting is not supported. |
| * @see #getAntibanding() |
| */ |
| 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. |
| * @see #SCENE_MODE_AUTO |
| * @see #SCENE_MODE_ACTION |
| * @see #SCENE_MODE_PORTRAIT |
| * @see #SCENE_MODE_LANDSCAPE |
| * @see #SCENE_MODE_NIGHT |
| * @see #SCENE_MODE_NIGHT_PORTRAIT |
| * @see #SCENE_MODE_THEATRE |
| * @see #SCENE_MODE_BEACH |
| * @see #SCENE_MODE_SNOW |
| * @see #SCENE_MODE_SUNSET |
| * @see #SCENE_MODE_STEADYPHOTO |
| * @see #SCENE_MODE_FIREWORKS |
| * @see #SCENE_MODE_SPORTS |
| * @see #SCENE_MODE_PARTY |
| * @see #SCENE_MODE_CANDLELIGHT |
| */ |
| public String getSceneMode() { |
| return get(KEY_SCENE_MODE); |
| } |
| |
| /** |
| * Sets the scene mode. Changing scene mode may override other |
| * parameters (such as flash mode, focus mode, white balance). For |
| * example, suppose originally flash mode is on and supported flash |
| * modes are on/off. In night scene mode, both flash mode and supported |
| * flash mode may be changed to off. After setting scene mode, |
| * applications should call getParameters to know if some parameters are |
| * changed. |
| * |
| * @param value scene mode. |
| * @see #getSceneMode() |
| */ |
| public void setSceneMode(String value) { |
| set(KEY_SCENE_MODE, value); |
| } |
| |
| /** |
| * Gets the supported scene modes. |
| * |
| * @return a list of supported scene modes. null if scene mode setting |
| * is not supported. |
| * @see #getSceneMode() |
| */ |
| public List<String> getSupportedSceneModes() { |
| String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current flash mode setting. |
| * |
| * @return current flash mode. null if flash mode setting is not |
| * supported. |
| * @see #FLASH_MODE_OFF |
| * @see #FLASH_MODE_AUTO |
| * @see #FLASH_MODE_ON |
| * @see #FLASH_MODE_RED_EYE |
| * @see #FLASH_MODE_TORCH |
| */ |
| public String getFlashMode() { |
| return get(KEY_FLASH_MODE); |
| } |
| |
| /** |
| * Sets the flash mode. |
| * |
| * @param value flash mode. |
| * @see #getFlashMode() |
| */ |
| public void setFlashMode(String value) { |
| set(KEY_FLASH_MODE, value); |
| } |
| |
| /** |
| * Gets the supported flash modes. |
| * |
| * @return a list of supported flash modes. null if flash mode setting |
| * is not supported. |
| * @see #getFlashMode() |
| */ |
| public List<String> getSupportedFlashModes() { |
| String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the current focus mode setting. |
| * |
| * @return current focus mode. This method will always return a non-null |
| * value. Applications should call {@link |
| * #autoFocus(AutoFocusCallback)} to start the focus if focus |
| * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. |
| * @see #FOCUS_MODE_AUTO |
| * @see #FOCUS_MODE_INFINITY |
| * @see #FOCUS_MODE_MACRO |
| * @see #FOCUS_MODE_FIXED |
| * @see #FOCUS_MODE_EDOF |
| * @see #FOCUS_MODE_CONTINUOUS_VIDEO |
| */ |
| public String getFocusMode() { |
| return get(KEY_FOCUS_MODE); |
| } |
| |
| /** |
| * Sets the focus mode. |
| * |
| * @param value focus mode. |
| * @see #getFocusMode() |
| */ |
| public void setFocusMode(String value) { |
| set(KEY_FOCUS_MODE, value); |
| } |
| |
| /** |
| * Gets the supported focus modes. |
| * |
| * @return a list of supported focus modes. This method will always |
| * return a list with at least one element. |
| * @see #getFocusMode() |
| */ |
| public List<String> getSupportedFocusModes() { |
| String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); |
| return split(str); |
| } |
| |
| /** |
| * Gets the focal length (in millimeter) of the camera. |
| * |
| * @return the focal length. This method will always return a valid |
| * value. |
| */ |
| public float getFocalLength() { |
| return Float.parseFloat(get(KEY_FOCAL_LENGTH)); |
| } |
| |
| /** |
| * Gets the horizontal angle of view in degrees. |
| * |
| * @return horizontal angle of view. This method will always return a |
| * valid value. |
| */ |
| public float getHorizontalViewAngle() { |
| return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); |
| } |
| |
| /** |
| * Gets the vertical angle of view in degrees. |
| * |
| * @return vertical angle of view. This method will always return a |
| * valid value. |
| */ |
| public float getVerticalViewAngle() { |
| return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); |
| } |
| |
| /** |
| * Gets the current exposure compensation index. |
| * |
| * @return current exposure compensation index. The range is {@link |
| * #getMinExposureCompensation} to {@link |
| * #getMaxExposureCompensation}. 0 means exposure is not |
| * adjusted. |
| */ |
| public int getExposureCompensation() { |
| return getInt(KEY_EXPOSURE_COMPENSATION, 0); |
| } |
| |
| /** |
| * Sets the exposure compensation index. |
| * |
| * @param value exposure compensation index. The valid value range is |
| * from {@link #getMinExposureCompensation} (inclusive) to {@link |
| * #getMaxExposureCompensation} (inclusive). 0 means exposure is |
| * not adjusted. Application should call |
| * getMinExposureCompensation and getMaxExposureCompensation to |
| * know if exposure compensation is supported. |
| */ |
| public void setExposureCompensation(int value) { |
| set(KEY_EXPOSURE_COMPENSATION, value); |
| } |
| |
| /** |
| * Gets the maximum exposure compensation index. |
| * |
| * @return maximum exposure compensation index (>=0). If both this |
| * method and {@link #getMinExposureCompensation} return 0, |
| * exposure compensation is not supported. |
| */ |
| public int getMaxExposureCompensation() { |
| return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); |
| } |
| |
| /** |
| * Gets the minimum exposure compensation index. |
| * |
| * @return minimum exposure compensation index (<=0). If both this |
| * method and {@link #getMaxExposureCompensation} return 0, |
| * exposure compensation is not supported. |
| */ |
| public int getMinExposureCompensation() { |
| return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); |
| } |
| |
| /** |
| * Gets the exposure compensation step. |
| * |
| * @return exposure compensation step. Applications can get EV by |
| * multiplying the exposure compensation index and step. Ex: if |
| * exposure compensation index is -6 and step is 0.333333333, EV |
| * is -2. |
| */ |
| public float getExposureCompensationStep() { |
| return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); |
| } |
| |
| /** |
| * Sets the auto-exposure lock state. Applications should check |
| * {@link #isAutoExposureLockSupported} before using this method. |
| * |
| * If set to true, the camera auto-exposure routine will pause until the |
| * lock is set to false. Exposure compensation settings changes will |
| * still take effect while auto-exposure is locked. Stopping preview |
| * with {@link #stopPreview()}, or triggering still image capture with |
| * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, |
| * Camera.PictureCallback)}, will automatically set the lock to |
| * false. However, the lock can be re-enabled before preview is |
| * re-started to keep the same AE parameters. Exposure compensation, in |
| * conjunction with re-enabling the AE lock after each still capture, |
| * can be used to capture an exposure-bracketed burst of images, for |
| * example. Auto-exposure state, including the lock state, will not be |
| * maintained after camera {@link #release()} is called. Locking |
| * auto-exposure after {@link #open()} but before the first call to |
| * {@link #startPreview()} will not allow the auto-exposure routine to |
| * run at all, and may result in severely over- or under-exposed images. |
| * |
| * The driver may also independently lock auto-exposure after auto-focus |
| * completes. If this is undesirable, be sure to always set the |
| * auto-exposure lock to false after the |
| * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is |
| * received. The {@link #getAutoExposureLock()} method can be used after |
| * the callback to determine if the camera has locked auto-exposure |
| * independently. |
| * |
| * @param toggle new state of the auto-exposure lock. True means that |
| * auto-exposure is locked, false means that the auto-exposure |
| * routine is free to run normally. |
| * |
| * @hide |
| */ |
| public void setAutoExposureLock(boolean toggle) { |
| set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); |
| } |
| |
| /** |
| * Gets the state of the auto-exposure lock. Applications should check |
| * {@link #isAutoExposureLockSupported} before using this method. See |
| * {@link #setAutoExposureLock} for details about the lock. |
| * |
| * @return State of the auto-exposure lock. Returns true if |
| * auto-exposure is currently locked, and false otherwise. The |
| * auto-exposure lock may be independently enabled by the camera |
| * subsystem when auto-focus has completed. This method can be |
| * used after the {@link AutoFocusCallback#onAutoFocus(boolean, |
| * Camera)} callback to determine if the camera has locked AE. |
| * |
| * @see #setAutoExposureLock(boolean) |
| * |
| * @hide |
| */ |
| public boolean getAutoExposureLock() { |
| String str = get(KEY_AUTO_EXPOSURE_LOCK); |
| return TRUE.equals(str); |
| } |
| |
| /** |
| * Returns true if auto-exposure locking is supported. Applications |
| * should call this before trying to lock auto-exposure. See |
| * {@link #setAutoExposureLock} for details about the lock. |
| * |
| * @return true if auto-exposure lock is supported. |
| * @see #setAutoExposureLock(boolean) |
| * |
| * @hide |
| */ |
| public boolean isAutoExposureLockSupported() { |
| String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); |
| return TRUE.equals(str); |
| } |
| |
| /** |
| * Gets current zoom value. This also works when smooth zoom is in |
| * progress. Applications should check {@link #isZoomSupported} before |
| * using this method. |
| * |
| * @return the current zoom value. The range is 0 to {@link |
| * #getMaxZoom}. 0 means the camera is not zoomed. |
| */ |
| public int getZoom() { |
| return getInt(KEY_ZOOM, 0); |
| } |
| |
| /** |
| * Sets current zoom value. If the camera is zoomed (value > 0), the |
| * actual picture size may be smaller than picture size setting. |
| * Applications can check the actual picture size after picture is |
| * returned from {@link PictureCallback}. The preview size remains the |
| * same in zoom. Applications should check {@link #isZoomSupported} |
| * before using this method. |
| * |
| * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. |
| */ |
| public void setZoom(int value) { |
| set(KEY_ZOOM, value); |
| } |
| |
| /** |
| * Returns true if zoom is supported. Applications should call this |
| * before using other zoom methods. |
| * |
| * @return true if zoom is supported. |
| */ |
| public boolean isZoomSupported() { |
| String str = get(KEY_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)}. |
| * Applications should call {@link #isZoomSupported} before using this |
| * method. This value may change in different preview size. Applications |
| * should call this again after setting preview size. |
| * |
| * @return the maximum zoom value supported by the camera. |
| */ |
| public int getMaxZoom() { |
| return getInt(KEY_MAX_ZOOM, 0); |
| } |
| |
| /** |
| * Gets the zoom ratios of all zoom values. Applications should check |
| * {@link #isZoomSupported} before using this method. |
| * |
| * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is |
| * returned as 320. The number of elements is {@link |
| * #getMaxZoom} + 1. The list is sorted from small to large. The |
| * first element is always 100. The last element is the zoom |
| * ratio of the maximum zoom value. |
| */ |
| public List<Integer> getZoomRatios() { |
| return splitInt(get(KEY_ZOOM_RATIOS)); |
| } |
| |
| /** |
| * Returns true if smooth zoom is supported. Applications should call |
| * this before using other smooth zoom methods. |
| * |
| * @return true if smooth zoom is supported. |
| */ |
| public boolean isSmoothZoomSupported() { |
| String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); |
| return TRUE.equals(str); |
| } |
| |
| /** |
| * Gets the distances from the camera to where an object appears to be |
| * in focus. The object is sharpest at the optimal focus distance. The |
| * depth of field is the far focus distance minus near focus distance. |
| * |
| * Focus distances may change after calling {@link |
| * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link |
| * #startPreview()}. Applications can call {@link #getParameters()} |
| * and this method anytime to get the latest focus distances. If the |
| * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change |
| * from time to time. |
| * |
| * This method is intended to estimate the distance between the camera |
| * and the subject. After autofocus, the subject distance may be within |
| * near and far focus distance. However, the precision depends on the |
| * camera hardware, autofocus algorithm, the focus area, and the scene. |
| * The error can be large and it should be only used as a reference. |
| * |
| * Far focus distance >= optimal focus distance >= near focus distance. |
| * If the focus distance is infinity, the value will be |
| * Float.POSITIVE_INFINITY. |
| * |
| * @param output focus distances in meters. output must be a float |
| * array with three elements. Near focus distance, optimal focus |
| * distance, and far focus distance will be filled in the array. |
| * @see #FOCUS_DISTANCE_NEAR_INDEX |
| * @see #FOCUS_DISTANCE_OPTIMAL_INDEX |
| * @see #FOCUS_DISTANCE_FAR_INDEX |
| */ |
| public void getFocusDistances(float[] output) { |
| if (output == null || output.length != 3) { |
| throw new IllegalArgumentException( |
| "output must be an float array with three elements."); |
| } |
| splitFloat(get(KEY_FOCUS_DISTANCES), output); |
| } |
| |
| /** |
| * Gets the maximum number of focus areas supported. This is the maximum |
| * length of the list in {@link #setFocusAreas(List)} and |
| * {@link #getFocusAreas()}. |
| * |
| * @return the maximum number of focus areas supported by the camera. |
| * @see #getFocusAreas() |
| */ |
| public int getMaxNumFocusAreas() { |
| return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); |
| } |
| |
| /** |
| * Gets the current focus areas. Camera driver uses the areas to decide |
| * focus. |
| * |
| * Before using this API or {@link #setFocusAreas(List)}, apps should |
| * call {@link #getMaxNumFocusAreas()} to know the maximum number of |
| * focus areas first. If the value is 0, focus area is not supported. |
| * |
| * Each focus area is a rectangle with specified weight. The direction |
| * is relative to the sensor orientation, that is, what the sensor sees. |
| * The direction is not affected by the rotation or mirroring of |
| * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle |
| * range from -1000 to 1000. (-1000, -1000) is the upper left point. |
| * (1000, 1000) is the lower right point. The length and width of focus |
| * areas cannot be 0 or negative. |
| * |
| * The weight must range from 1 to 1000. The weight should be |
| * interpreted as a per-pixel weight - all pixels in the area have the |
| * specified weight. This means a small area with the same weight as a |
| * larger area will have less influence on the focusing than the larger |
| * area. Focus areas can partially overlap and the driver will add the |
| * weights in the overlap region. |
| * |
| * A special case of null focus area means driver to decide the focus |
| * area. For example, the driver may use more signals to decide focus |
| * areas and change them dynamically. Apps can set all-zero if they want |
| * the driver to decide focus areas. |
| * |
| * Focus areas are relative to the current field of view |
| * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) |
| * represents the top of the currently visible camera frame. The focus |
| * area cannot be set to be outside the current field of view, even |
| * when using zoom. |
| * |
| * Focus area only has effect if the current focus mode is |
| * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, or |
| * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. |
| * |
| * @return a list of current focus areas |
| */ |
| public List<Area> getFocusAreas() { |
| return splitArea(get(KEY_FOCUS_AREAS)); |
| } |
| |
| /** |
| * Sets focus areas. See {@link #getFocusAreas()} for documentation. |
| * |
| * @param focusAreas the focus areas |
| * @see #getFocusAreas() |
| */ |
| public void setFocusAreas(List<Area> focusAreas) { |
| set(KEY_FOCUS_AREAS, focusAreas); |
| } |
| |
| /** |
| * Gets the maximum number of metering areas supported. This is the |
| * maximum length of the list in {@link #setMeteringAreas(List)} and |
| * {@link #getMeteringAreas()}. |
| * |
| * @return the maximum number of metering areas supported by the camera. |
| * @see #getMeteringAreas() |
| */ |
| public int getMaxNumMeteringAreas() { |
| return getInt(KEY_MAX_NUM_METERING_AREAS, 0); |
| } |
| |
| /** |
| * Gets the current metering areas. Camera driver uses these areas to |
| * decide exposure. |
| * |
| * Before using this API or {@link #setMeteringAreas(List)}, apps should |
| * call {@link #getMaxNumMeteringAreas()} to know the maximum number of |
| * metering areas first. If the value is 0, metering area is not |
| * supported. |
| * |
| * Each metering area is a rectangle with specified weight. The |
| * direction is relative to the sensor orientation, that is, what the |
| * sensor sees. The direction is not affected by the rotation or |
| * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the |
| * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left |
| * point. (1000, 1000) is the lower right point. The length and width of |
| * metering areas cannot be 0 or negative. |
| * |
| * The weight must range from 1 to 1000, and represents a weight for |
| * every pixel in the area. This means that a large metering area with |
| * the same weight as a smaller area will have more effect in the |
| * metering result. Metering areas can partially overlap and the driver |
| * will add the weights in the overlap region. |
| * |
| * A special case of null metering area means driver to decide the |
| * metering area. For example, the driver may use more signals to decide |
| * metering areas and change them dynamically. Apps can set all-zero if |
| * they want the driver to decide metering areas. |
| * |
| * Metering areas are relative to the current field of view |
| * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) |
| * represents the top of the currently visible camera frame. The |
| * metering area cannot be set to be outside the current field of view, |
| * even when using zoom. |
| * |
| * No matter what metering areas are, the final exposure are compensated |
| * by {@link #setExposureCompensation(int)}. |
| * |
| * @return a list of current metering areas |
| */ |
| public List<Area> getMeteringAreas() { |
| return splitArea(KEY_METERING_AREAS); |
| } |
| |
| /** |
| * Sets metering areas. See {@link #getMeteringAreas()} for |
| * documentation. |
| * |
| * @param meteringAreas the metering areas |
| * @see #getMeteringAreas() |
| */ |
| public void setMeteringAreas(List<Area> meteringAreas) { |
| set(KEY_METERING_AREAS, meteringAreas); |
| } |
| |
| // 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; |
| } |
| |
| private void splitInt(String str, int[] output) { |
| if (str == null) return; |
| |
| StringTokenizer tokenizer = new StringTokenizer(str, ","); |
| int index = 0; |
| while (tokenizer.hasMoreElements()) { |
| String token = tokenizer.nextToken(); |
| output[index++] = Integer.parseInt(token); |
| } |
| } |
| |
| // Splits a comma delimited string to an ArrayList of Float. |
| private void splitFloat(String str, float[] output) { |
| if (str == null) return; |
| |
| StringTokenizer tokenizer = new StringTokenizer(str, ","); |
| int index = 0; |
| while (tokenizer.hasMoreElements()) { |
| String token = tokenizer.nextToken(); |
| output[index++] = Float.parseFloat(token); |
| } |
| } |
| |
| // Returns the value of a float parameter. |
| private float getFloat(String key, float defaultValue) { |
| try { |
| return Float.parseFloat(mMap.get(key)); |
| } catch (NumberFormatException ex) { |
| return defaultValue; |
| } |
| } |
| |
| // Returns the value of a integer parameter. |
| private int getInt(String key, int defaultValue) { |
| try { |
| return Integer.parseInt(mMap.get(key)); |
| } catch (NumberFormatException ex) { |
| return defaultValue; |
| } |
| } |
| |
| // 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; |
| } |
| |
| // Splits a comma delimited string to an ArrayList of int array. |
| // Example string: "(10000,26623),(10000,30000)". Return null if the |
| // passing string is null or the size is 0. |
| private ArrayList<int[]> splitRange(String str) { |
| if (str == null || str.charAt(0) != '(' |
| || str.charAt(str.length() - 1) != ')') { |
| Log.e(TAG, "Invalid range list string=" + str); |
| return null; |
| } |
| |
| ArrayList<int[]> rangeList = new ArrayList<int[]>(); |
| int endIndex, fromIndex = 1; |
| do { |
| int[] range = new int[2]; |
| endIndex = str.indexOf("),(", fromIndex); |
| if (endIndex == -1) endIndex = str.length() - 1; |
| splitInt(str.substring(fromIndex, endIndex), range); |
| rangeList.add(range); |
| fromIndex = endIndex + 3; |
| } while (endIndex != str.length() - 1); |
| |
| if (rangeList.size() == 0) return null; |
| return rangeList; |
| } |
| |
| // Splits a comma delimited string to an ArrayList of Area objects. |
| // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if |
| // the passing string is null or the size is 0 or (0,0,0,0,0). |
| private ArrayList<Area> splitArea(String str) { |
| if (str == null || str.charAt(0) != '(' |
| || str.charAt(str.length() - 1) != ')') { |
| Log.e(TAG, "Invalid area string=" + str); |
| return null; |
| } |
| |
| ArrayList<Area> result = new ArrayList<Area>(); |
| int endIndex, fromIndex = 1; |
| int[] array = new int[5]; |
| do { |
| endIndex = str.indexOf("),(", fromIndex); |
| if (endIndex == -1) endIndex = str.length() - 1; |
| splitInt(str.substring(fromIndex, endIndex), array); |
| Rect rect = new Rect(array[0], array[1], array[2], array[3]); |
| result.add(new Area(rect, array[4])); |
| fromIndex = endIndex + 3; |
| } while (endIndex != str.length() - 1); |
| |
| if (result.size() == 0) return null; |
| |
| if (result.size() == 1) { |
| Area area = (Area) result.get(0); |
| Rect rect = area.rect; |
| if (rect.left == 0 && rect.top == 0 && rect.right == 0 |
| && rect.bottom == 0 && area.weight == 0) { |
| return null; |
| } |
| } |
| |
| return result; |
| } |
| }; |
| } |