Camera.java revision 9a10bf0386ac9822e33a15820d8cd1fd8bdb5572
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.hardware; 18 19import android.annotation.SdkConstant; 20import android.annotation.SdkConstant.SdkConstantType; 21import android.graphics.ImageFormat; 22import android.graphics.Point; 23import android.graphics.Rect; 24import android.graphics.SurfaceTexture; 25import android.os.Handler; 26import android.os.Looper; 27import android.os.Message; 28import android.util.Log; 29import android.view.Surface; 30import android.view.SurfaceHolder; 31 32import java.io.IOException; 33import java.lang.ref.WeakReference; 34import java.util.ArrayList; 35import java.util.HashMap; 36import java.util.List; 37import java.util.StringTokenizer; 38 39 40/** 41 * The Camera class is used to set image capture settings, start/stop preview, 42 * snap pictures, and retrieve frames for encoding for video. This class is a 43 * client for the Camera service, which manages the actual camera hardware. 44 * 45 * <p>To access the device camera, you must declare the 46 * {@link android.Manifest.permission#CAMERA} permission in your Android 47 * Manifest. Also be sure to include the 48 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 49 * manifest element to declare camera features used by your application. 50 * For example, if you use the camera and auto-focus feature, your Manifest 51 * should include the following:</p> 52 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 53 * <uses-feature android:name="android.hardware.camera" /> 54 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 55 * 56 * <p>To take pictures with this class, use the following steps:</p> 57 * 58 * <ol> 59 * <li>Obtain an instance of Camera from {@link #open(int)}. 60 * 61 * <li>Get existing (default) settings with {@link #getParameters()}. 62 * 63 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 64 * {@link #setParameters(Camera.Parameters)}. 65 * 66 * <li>If desired, call {@link #setDisplayOrientation(int)}. 67 * 68 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 69 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 70 * will be unable to start the preview. 71 * 72 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 73 * preview surface. Preview must be started before you can take a picture. 74 * 75 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 76 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 77 * capture a photo. Wait for the callbacks to provide the actual image data. 78 * 79 * <li>After taking a picture, preview display will have stopped. To take more 80 * photos, call {@link #startPreview()} again first. 81 * 82 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 83 * 84 * <li><b>Important:</b> Call {@link #release()} to release the camera for 85 * use by other applications. Applications should release the camera 86 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 87 * it in {@link android.app.Activity#onResume()}). 88 * </ol> 89 * 90 * <p>To quickly switch to video recording mode, use these steps:</p> 91 * 92 * <ol> 93 * <li>Obtain and initialize a Camera and start preview as described above. 94 * 95 * <li>Call {@link #unlock()} to allow the media process to access the camera. 96 * 97 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 98 * See {@link android.media.MediaRecorder} information about video recording. 99 * 100 * <li>When finished recording, call {@link #reconnect()} to re-acquire 101 * and re-lock the camera. 102 * 103 * <li>If desired, restart preview and take more photos or videos. 104 * 105 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 106 * </ol> 107 * 108 * <p>This class is not thread-safe, and is meant for use from one event thread. 109 * Most long-running operations (preview, focus, photo capture, etc) happen 110 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 111 * on the event thread {@link #open(int)} was called from. This class's methods 112 * must never be called from multiple threads at once.</p> 113 * 114 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 115 * may have different hardware specifications, such as megapixel ratings and 116 * auto-focus capabilities. In order for your application to be compatible with 117 * more devices, you should not make assumptions about the device camera 118 * specifications.</p> 119 */ 120public class Camera { 121 private static final String TAG = "Camera"; 122 123 // These match the enums in frameworks/base/include/camera/Camera.h 124 private static final int CAMERA_MSG_ERROR = 0x001; 125 private static final int CAMERA_MSG_SHUTTER = 0x002; 126 private static final int CAMERA_MSG_FOCUS = 0x004; 127 private static final int CAMERA_MSG_ZOOM = 0x008; 128 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 129 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 130 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 131 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 132 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 133 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 134 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 135 private static final int CAMERA_MSG_ALL_MSGS = 0x4FF; 136 137 private int mNativeContext; // accessed by native methods 138 private EventHandler mEventHandler; 139 private ShutterCallback mShutterCallback; 140 private PictureCallback mRawImageCallback; 141 private PictureCallback mJpegCallback; 142 private PreviewCallback mPreviewCallback; 143 private PictureCallback mPostviewCallback; 144 private AutoFocusCallback mAutoFocusCallback; 145 private OnZoomChangeListener mZoomListener; 146 private FaceDetectionListener mFaceListener; 147 private ErrorCallback mErrorCallback; 148 private boolean mOneShot; 149 private boolean mWithBuffer; 150 private boolean mFaceDetectionRunning = false; 151 152 /** 153 * Broadcast Action: A new picture is taken by the camera, and the entry of 154 * the picture has been added to the media store. 155 * {@link android.content.Intent#getData} is URI of the picture. 156 */ 157 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 158 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 159 160 /** 161 * Broadcast Action: A new video is recorded by the camera, and the entry 162 * of the video has been added to the media store. 163 * {@link android.content.Intent#getData} is URI of the video. 164 */ 165 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 166 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 167 168 /** 169 * Hardware face detection. It does not use much CPU. 170 */ 171 private static final int CAMERA_FACE_DETECTION_HW = 0; 172 173 /** 174 * Software face detection. It uses some CPU. 175 */ 176 private static final int CAMERA_FACE_DETECTION_SW = 1; 177 178 /** 179 * Returns the number of physical cameras available on this device. 180 */ 181 public native static int getNumberOfCameras(); 182 183 /** 184 * Returns the information about a particular camera. 185 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 186 */ 187 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 188 189 /** 190 * Information about a camera 191 */ 192 public static class CameraInfo { 193 /** 194 * The facing of the camera is opposite to that of the screen. 195 */ 196 public static final int CAMERA_FACING_BACK = 0; 197 198 /** 199 * The facing of the camera is the same as that of the screen. 200 */ 201 public static final int CAMERA_FACING_FRONT = 1; 202 203 /** 204 * The direction that the camera faces to. It should be 205 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 206 */ 207 public int facing; 208 209 /** 210 * <p>The orientation of the camera image. The value is the angle that the 211 * camera image needs to be rotated clockwise so it shows correctly on 212 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 213 * 214 * <p>For example, suppose a device has a naturally tall screen. The 215 * back-facing camera sensor is mounted in landscape. You are looking at 216 * the screen. If the top side of the camera sensor is aligned with the 217 * right edge of the screen in natural orientation, the value should be 218 * 90. If the top side of a front-facing camera sensor is aligned with 219 * the right of the screen, the value should be 270.</p> 220 * 221 * @see #setDisplayOrientation(int) 222 * @see Parameters#setRotation(int) 223 * @see Parameters#setPreviewSize(int, int) 224 * @see Parameters#setPictureSize(int, int) 225 * @see Parameters#setJpegThumbnailSize(int, int) 226 */ 227 public int orientation; 228 }; 229 230 /** 231 * Creates a new Camera object to access a particular hardware camera. 232 * 233 * <p>You must call {@link #release()} when you are done using the camera, 234 * otherwise it will remain locked and be unavailable to other applications. 235 * 236 * <p>Your application should only have one Camera object active at a time 237 * for a particular hardware camera. 238 * 239 * <p>Callbacks from other methods are delivered to the event loop of the 240 * thread which called open(). If this thread has no event loop, then 241 * callbacks are delivered to the main application event loop. If there 242 * is no main application event loop, callbacks are not delivered. 243 * 244 * <p class="caution"><b>Caution:</b> On some devices, this method may 245 * take a long time to complete. It is best to call this method from a 246 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 247 * blocking the main application UI thread. 248 * 249 * @param cameraId the hardware camera to access, between 0 and 250 * {@link #getNumberOfCameras()}-1. 251 * @return a new Camera object, connected, locked and ready for use. 252 * @throws RuntimeException if connection to the camera service fails (for 253 * example, if the camera is in use by another process or device policy 254 * manager has disabled the camera). 255 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 256 */ 257 public static Camera open(int cameraId) { 258 return new Camera(cameraId); 259 } 260 261 /** 262 * Creates a new Camera object to access the first back-facing camera on the 263 * device. If the device does not have a back-facing camera, this returns 264 * null. 265 * @see #open(int) 266 */ 267 public static Camera open() { 268 int numberOfCameras = getNumberOfCameras(); 269 CameraInfo cameraInfo = new CameraInfo(); 270 for (int i = 0; i < numberOfCameras; i++) { 271 getCameraInfo(i, cameraInfo); 272 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 273 return new Camera(i); 274 } 275 } 276 return null; 277 } 278 279 Camera(int cameraId) { 280 mShutterCallback = null; 281 mRawImageCallback = null; 282 mJpegCallback = null; 283 mPreviewCallback = null; 284 mPostviewCallback = null; 285 mZoomListener = null; 286 287 Looper looper; 288 if ((looper = Looper.myLooper()) != null) { 289 mEventHandler = new EventHandler(this, looper); 290 } else if ((looper = Looper.getMainLooper()) != null) { 291 mEventHandler = new EventHandler(this, looper); 292 } else { 293 mEventHandler = null; 294 } 295 296 native_setup(new WeakReference<Camera>(this), cameraId); 297 } 298 299 protected void finalize() { 300 native_release(); 301 } 302 303 private native final void native_setup(Object camera_this, int cameraId); 304 private native final void native_release(); 305 306 307 /** 308 * Disconnects and releases the Camera object resources. 309 * 310 * <p>You must call this as soon as you're done with the Camera object.</p> 311 */ 312 public final void release() { 313 native_release(); 314 mFaceDetectionRunning = false; 315 } 316 317 /** 318 * Unlocks the camera to allow another process to access it. 319 * Normally, the camera is locked to the process with an active Camera 320 * object until {@link #release()} is called. To allow rapid handoff 321 * between processes, you can call this method to release the camera 322 * temporarily for another process to use; once the other process is done 323 * you can call {@link #reconnect()} to reclaim the camera. 324 * 325 * <p>This must be done before calling 326 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 327 * called after recording starts. 328 * 329 * <p>If you are not recording video, you probably do not need this method. 330 * 331 * @throws RuntimeException if the camera cannot be unlocked. 332 */ 333 public native final void unlock(); 334 335 /** 336 * Re-locks the camera to prevent other processes from accessing it. 337 * Camera objects are locked by default unless {@link #unlock()} is 338 * called. Normally {@link #reconnect()} is used instead. 339 * 340 * <p>Since API level 13, camera is automatically locked for applications in 341 * {@link android.media.MediaRecorder#start()}. Applications can use the 342 * camera (ex: zoom) after recording starts. There is no need to call this 343 * after recording starts or stops. 344 * 345 * <p>If you are not recording video, you probably do not need this method. 346 * 347 * @throws RuntimeException if the camera cannot be re-locked (for 348 * example, if the camera is still in use by another process). 349 */ 350 public native final void lock(); 351 352 /** 353 * Reconnects to the camera service after another process used it. 354 * After {@link #unlock()} is called, another process may use the 355 * camera; when the process is done, you must reconnect to the camera, 356 * which will re-acquire the lock and allow you to continue using the 357 * camera. 358 * 359 * <p>Since API level 13, camera is automatically locked for applications in 360 * {@link android.media.MediaRecorder#start()}. Applications can use the 361 * camera (ex: zoom) after recording starts. There is no need to call this 362 * after recording starts or stops. 363 * 364 * <p>If you are not recording video, you probably do not need this method. 365 * 366 * @throws IOException if a connection cannot be re-established (for 367 * example, if the camera is still in use by another process). 368 */ 369 public native final void reconnect() throws IOException; 370 371 /** 372 * Sets the {@link Surface} to be used for live preview. 373 * Either a surface or surface texture is necessary for preview, and 374 * preview is necessary to take pictures. The same surface can be re-set 375 * without harm. Setting a preview surface will un-set any preview surface 376 * texture that was set via {@link #setPreviewTexture}. 377 * 378 * <p>The {@link SurfaceHolder} must already contain a surface when this 379 * method is called. If you are using {@link android.view.SurfaceView}, 380 * you will need to register a {@link SurfaceHolder.Callback} with 381 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 382 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 383 * calling setPreviewDisplay() or starting preview. 384 * 385 * <p>This method must be called before {@link #startPreview()}. The 386 * one exception is that if the preview surface is not set (or set to null) 387 * before startPreview() is called, then this method may be called once 388 * with a non-null parameter to set the preview surface. (This allows 389 * camera setup and surface creation to happen in parallel, saving time.) 390 * The preview surface may not otherwise change while preview is running. 391 * 392 * @param holder containing the Surface on which to place the preview, 393 * or null to remove the preview surface 394 * @throws IOException if the method fails (for example, if the surface 395 * is unavailable or unsuitable). 396 */ 397 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 398 if (holder != null) { 399 setPreviewDisplay(holder.getSurface()); 400 } else { 401 setPreviewDisplay((Surface)null); 402 } 403 } 404 405 private native final void setPreviewDisplay(Surface surface) throws IOException; 406 407 /** 408 * Sets the {@link SurfaceTexture} to be used for live preview. 409 * Either a surface or surface texture is necessary for preview, and 410 * preview is necessary to take pictures. The same surface texture can be 411 * re-set without harm. Setting a preview surface texture will un-set any 412 * preview surface that was set via {@link #setPreviewDisplay}. 413 * 414 * <p>This method must be called before {@link #startPreview()}. The 415 * one exception is that if the preview surface texture is not set (or set 416 * to null) before startPreview() is called, then this method may be called 417 * once with a non-null parameter to set the preview surface. (This allows 418 * camera setup and surface creation to happen in parallel, saving time.) 419 * The preview surface texture may not otherwise change while preview is 420 * running. 421 * 422 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 423 * SurfaceTexture set as the preview texture have an unspecified zero point, 424 * and cannot be directly compared between different cameras or different 425 * instances of the same camera, or across multiple runs of the same 426 * program. 427 * 428 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 429 * images are to be sent or null to remove the current preview surface 430 * texture 431 * @throws IOException if the method fails (for example, if the surface 432 * texture is unavailable or unsuitable). 433 */ 434 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 435 436 /** 437 * Callback interface used to deliver copies of preview frames as 438 * they are displayed. 439 * 440 * @see #setPreviewCallback(Camera.PreviewCallback) 441 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 442 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 443 * @see #startPreview() 444 */ 445 public interface PreviewCallback 446 { 447 /** 448 * Called as preview frames are displayed. This callback is invoked 449 * on the event thread {@link #open(int)} was called from. 450 * 451 * @param data the contents of the preview frame in the format defined 452 * by {@link android.graphics.ImageFormat}, which can be queried 453 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 454 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 455 * is never called, the default will be the YCbCr_420_SP 456 * (NV21) format. 457 * @param camera the Camera service object. 458 */ 459 void onPreviewFrame(byte[] data, Camera camera); 460 }; 461 462 /** 463 * Starts capturing and drawing preview frames to the screen. 464 * Preview will not actually start until a surface is supplied 465 * with {@link #setPreviewDisplay(SurfaceHolder)} or 466 * {@link #setPreviewTexture(SurfaceTexture)}. 467 * 468 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 469 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 470 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 471 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 472 * will be called when preview data becomes available. 473 */ 474 public native final void startPreview(); 475 476 /** 477 * Stops capturing and drawing preview frames to the surface, and 478 * resets the camera for a future call to {@link #startPreview()}. 479 */ 480 public final void stopPreview() { 481 _stopPreview(); 482 mFaceDetectionRunning = false; 483 } 484 485 private native final void _stopPreview(); 486 487 /** 488 * Return current preview state. 489 * 490 * FIXME: Unhide before release 491 * @hide 492 */ 493 public native final boolean previewEnabled(); 494 495 /** 496 * Installs a callback to be invoked for every preview frame in addition 497 * to displaying them on the screen. The callback will be repeatedly called 498 * for as long as preview is active. This method can be called at any time, 499 * even while preview is live. Any other preview callbacks are overridden. 500 * 501 * @param cb a callback object that receives a copy of each preview frame, 502 * or null to stop receiving callbacks. 503 */ 504 public final void setPreviewCallback(PreviewCallback cb) { 505 mPreviewCallback = cb; 506 mOneShot = false; 507 mWithBuffer = false; 508 // Always use one-shot mode. We fake camera preview mode by 509 // doing one-shot preview continuously. 510 setHasPreviewCallback(cb != null, false); 511 } 512 513 /** 514 * Installs a callback to be invoked for the next preview frame in addition 515 * to displaying it on the screen. After one invocation, the callback is 516 * cleared. This method can be called any time, even when preview is live. 517 * Any other preview callbacks are overridden. 518 * 519 * @param cb a callback object that receives a copy of the next preview frame, 520 * or null to stop receiving callbacks. 521 */ 522 public final void setOneShotPreviewCallback(PreviewCallback cb) { 523 mPreviewCallback = cb; 524 mOneShot = true; 525 mWithBuffer = false; 526 setHasPreviewCallback(cb != null, false); 527 } 528 529 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 530 531 /** 532 * Installs a callback to be invoked for every preview frame, using buffers 533 * supplied with {@link #addCallbackBuffer(byte[])}, in addition to 534 * displaying them on the screen. The callback will be repeatedly called 535 * for as long as preview is active and buffers are available. 536 * Any other preview callbacks are overridden. 537 * 538 * <p>The purpose of this method is to improve preview efficiency and frame 539 * rate by allowing preview frame memory reuse. You must call 540 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 541 * calling this method -- or no callbacks will received. 542 * 543 * The buffer queue will be cleared if this method is called with a null 544 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 545 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. 546 * 547 * @param cb a callback object that receives a copy of the preview frame, 548 * or null to stop receiving callbacks and clear the buffer queue. 549 * @see #addCallbackBuffer(byte[]) 550 */ 551 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 552 mPreviewCallback = cb; 553 mOneShot = false; 554 mWithBuffer = true; 555 setHasPreviewCallback(cb != null, true); 556 } 557 558 /** 559 * Adds a pre-allocated buffer to the preview callback buffer queue. 560 * Applications can add one or more buffers to the queue. When a preview 561 * frame arrives and there is still at least one available buffer, the 562 * buffer will be used and removed from the queue. Then preview callback is 563 * invoked with the buffer. If a frame arrives and there is no buffer left, 564 * the frame is discarded. Applications should add buffers back when they 565 * finish processing the data in them. 566 * 567 * <p>The size of the buffer is determined by multiplying the preview 568 * image width, height, and bytes per pixel. The width and height can be 569 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 570 * can be computed from 571 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 572 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 573 * 574 * <p>This method is only necessary when 575 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 576 * {@link #setPreviewCallback(PreviewCallback)} or 577 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 578 * are automatically allocated. When a supplied buffer is too small to 579 * hold the preview frame data, preview callback will return null and 580 * the buffer will be removed from the buffer queue. 581 * 582 * @param callbackBuffer the buffer to add to the queue. 583 * The size should be width * height * bits_per_pixel / 8. 584 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 585 */ 586 public final void addCallbackBuffer(byte[] callbackBuffer) 587 { 588 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 589 } 590 591 /** 592 * Adds a pre-allocated buffer to the raw image callback buffer queue. 593 * Applications can add one or more buffers to the queue. When a raw image 594 * frame arrives and there is still at least one available buffer, the 595 * buffer will be used to hold the raw image data and removed from the 596 * queue. Then raw image callback is invoked with the buffer. If a raw 597 * image frame arrives but there is no buffer left, the frame is 598 * discarded. Applications should add buffers back when they finish 599 * processing the data in them by calling this method again in order 600 * to avoid running out of raw image callback buffers. 601 * 602 * <p>The size of the buffer is determined by multiplying the raw image 603 * width, height, and bytes per pixel. The width and height can be 604 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 605 * can be computed from 606 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 607 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 608 * 609 * <p>This method is only necessary when the PictureCallbck for raw image 610 * is used while calling {@link #takePicture(Camera.ShutterCallback, 611 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 612 * 613 * <p>Please note that by calling this method, the mode for 614 * application-managed callback buffers is triggered. If this method has 615 * never been called, null will be returned by the raw image callback since 616 * there is no image callback buffer available. Furthermore, When a supplied 617 * buffer is too small to hold the raw image data, raw image callback will 618 * return null and the buffer will be removed from the buffer queue. 619 * 620 * @param callbackBuffer the buffer to add to the raw image callback buffer 621 * queue. The size should be width * height * (bits per pixel) / 8. An 622 * null callbackBuffer will be ignored and won't be added to the queue. 623 * 624 * @see #takePicture(Camera.ShutterCallback, 625 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 626 * 627 * {@hide} 628 */ 629 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 630 { 631 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 632 } 633 634 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 635 { 636 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 637 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 638 msgType != CAMERA_MSG_RAW_IMAGE) { 639 throw new IllegalArgumentException( 640 "Unsupported message type: " + msgType); 641 } 642 643 _addCallbackBuffer(callbackBuffer, msgType); 644 } 645 646 private native final void _addCallbackBuffer( 647 byte[] callbackBuffer, int msgType); 648 649 private class EventHandler extends Handler 650 { 651 private Camera mCamera; 652 653 public EventHandler(Camera c, Looper looper) { 654 super(looper); 655 mCamera = c; 656 } 657 658 @Override 659 public void handleMessage(Message msg) { 660 switch(msg.what) { 661 case CAMERA_MSG_SHUTTER: 662 if (mShutterCallback != null) { 663 mShutterCallback.onShutter(); 664 } 665 return; 666 667 case CAMERA_MSG_RAW_IMAGE: 668 if (mRawImageCallback != null) { 669 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 670 } 671 return; 672 673 case CAMERA_MSG_COMPRESSED_IMAGE: 674 if (mJpegCallback != null) { 675 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 676 } 677 return; 678 679 case CAMERA_MSG_PREVIEW_FRAME: 680 if (mPreviewCallback != null) { 681 PreviewCallback cb = mPreviewCallback; 682 if (mOneShot) { 683 // Clear the callback variable before the callback 684 // in case the app calls setPreviewCallback from 685 // the callback function 686 mPreviewCallback = null; 687 } else if (!mWithBuffer) { 688 // We're faking the camera preview mode to prevent 689 // the app from being flooded with preview frames. 690 // Set to oneshot mode again. 691 setHasPreviewCallback(true, false); 692 } 693 cb.onPreviewFrame((byte[])msg.obj, mCamera); 694 } 695 return; 696 697 case CAMERA_MSG_POSTVIEW_FRAME: 698 if (mPostviewCallback != null) { 699 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 700 } 701 return; 702 703 case CAMERA_MSG_FOCUS: 704 if (mAutoFocusCallback != null) { 705 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 706 } 707 return; 708 709 case CAMERA_MSG_ZOOM: 710 if (mZoomListener != null) { 711 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 712 } 713 return; 714 715 case CAMERA_MSG_PREVIEW_METADATA: 716 if (mFaceListener != null) { 717 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 718 } 719 return; 720 721 case CAMERA_MSG_ERROR : 722 Log.e(TAG, "Error " + msg.arg1); 723 if (mErrorCallback != null) { 724 mErrorCallback.onError(msg.arg1, mCamera); 725 } 726 return; 727 728 default: 729 Log.e(TAG, "Unknown message type " + msg.what); 730 return; 731 } 732 } 733 } 734 735 private static void postEventFromNative(Object camera_ref, 736 int what, int arg1, int arg2, Object obj) 737 { 738 Camera c = (Camera)((WeakReference)camera_ref).get(); 739 if (c == null) 740 return; 741 742 if (c.mEventHandler != null) { 743 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 744 c.mEventHandler.sendMessage(m); 745 } 746 } 747 748 /** 749 * Callback interface used to notify on completion of camera auto focus. 750 * 751 * <p>Devices that do not support auto-focus will receive a "fake" 752 * callback to this interface. If your application needs auto-focus and 753 * should not be installed on devices <em>without</em> auto-focus, you must 754 * declare that your app uses the 755 * {@code android.hardware.camera.autofocus} feature, in the 756 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 757 * manifest element.</p> 758 * 759 * @see #autoFocus(AutoFocusCallback) 760 */ 761 public interface AutoFocusCallback 762 { 763 /** 764 * Called when the camera auto focus completes. If the camera 765 * does not support auto-focus and autoFocus is called, 766 * onAutoFocus will be called immediately with a fake value of 767 * <code>success</code> set to <code>true</code>. 768 * 769 * The auto-focus routine may lock auto-exposure and auto-white balance 770 * after it completes. To check for the state of these locks, use the 771 * {@link android.hardware.Camera.Parameters#getAutoExposureLock()} and 772 * {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 773 * methods. If such locking is undesirable, use 774 * {@link android.hardware.Camera.Parameters#setAutoExposureLock(boolean)} 775 * and 776 * {@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean)} 777 * to release the locks. 778 * 779 * @param success true if focus was successful, false if otherwise 780 * @param camera the Camera service object 781 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 782 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 783 */ 784 void onAutoFocus(boolean success, Camera camera); 785 }; 786 787 /** 788 * Starts camera auto-focus and registers a callback function to run when 789 * the camera is focused. This method is only valid when preview is active 790 * (between {@link #startPreview()} and before {@link #stopPreview()}). 791 * 792 * <p>Callers should check 793 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 794 * this method should be called. If the camera does not support auto-focus, 795 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 796 * callback will be called immediately. 797 * 798 * <p>If your application should not be installed 799 * on devices without auto-focus, you must declare that your application 800 * uses auto-focus with the 801 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 802 * manifest element.</p> 803 * 804 * <p>If the current flash mode is not 805 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 806 * fired during auto-focus, depending on the driver and camera hardware.<p> 807 * 808 * The auto-focus routine may lock auto-exposure and auto-white balance 809 * after it completes. To check for the state of these locks, use the 810 * {@link android.hardware.Camera.Parameters#getAutoExposureLock()} and 811 * {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 812 * methods after the {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 813 * callback is invoked. If such locking is undesirable, use 814 * {@link android.hardware.Camera.Parameters#setAutoExposureLock(boolean)} 815 * and 816 * {@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean)} 817 * to release the locks. 818 * 819 * @param cb the callback to run 820 * @see #cancelAutoFocus() 821 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 822 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 823 */ 824 public final void autoFocus(AutoFocusCallback cb) 825 { 826 mAutoFocusCallback = cb; 827 native_autoFocus(); 828 } 829 private native final void native_autoFocus(); 830 831 /** 832 * Cancels any auto-focus function in progress. 833 * Whether or not auto-focus is currently in progress, 834 * this function will return the focus position to the default. 835 * If the camera does not support auto-focus, this is a no-op. 836 * 837 * Canceling auto-focus will return the auto-exposure lock and auto-white 838 * balance lock to their state before {@link #autoFocus(AutoFocusCallback)} 839 * was called. 840 * 841 * @see #autoFocus(Camera.AutoFocusCallback) 842 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 843 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 844 */ 845 public final void cancelAutoFocus() 846 { 847 mAutoFocusCallback = null; 848 native_cancelAutoFocus(); 849 } 850 private native final void native_cancelAutoFocus(); 851 852 /** 853 * Callback interface used to signal the moment of actual image capture. 854 * 855 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 856 */ 857 public interface ShutterCallback 858 { 859 /** 860 * Called as near as possible to the moment when a photo is captured 861 * from the sensor. This is a good opportunity to play a shutter sound 862 * or give other feedback of camera operation. This may be some time 863 * after the photo was triggered, but some time before the actual data 864 * is available. 865 */ 866 void onShutter(); 867 } 868 869 /** 870 * Callback interface used to supply image data from a photo capture. 871 * 872 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 873 */ 874 public interface PictureCallback { 875 /** 876 * Called when image data is available after a picture is taken. 877 * The format of the data depends on the context of the callback 878 * and {@link Camera.Parameters} settings. 879 * 880 * @param data a byte array of the picture data 881 * @param camera the Camera service object 882 */ 883 void onPictureTaken(byte[] data, Camera camera); 884 }; 885 886 /** 887 * Equivalent to takePicture(shutter, raw, null, jpeg). 888 * 889 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 890 */ 891 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 892 PictureCallback jpeg) { 893 takePicture(shutter, raw, null, jpeg); 894 } 895 private native final void native_takePicture(int msgType); 896 897 /** 898 * Triggers an asynchronous image capture. The camera service will initiate 899 * a series of callbacks to the application as the image capture progresses. 900 * The shutter callback occurs after the image is captured. This can be used 901 * to trigger a sound to let the user know that image has been captured. The 902 * raw callback occurs when the raw image data is available (NOTE: the data 903 * will be null if there is no raw image callback buffer available or the 904 * raw image callback buffer is not large enough to hold the raw image). 905 * The postview callback occurs when a scaled, fully processed postview 906 * image is available (NOTE: not all hardware supports this). The jpeg 907 * callback occurs when the compressed image is available. If the 908 * application does not need a particular callback, a null can be passed 909 * instead of a callback method. 910 * 911 * <p>This method is only valid when preview is active (after 912 * {@link #startPreview()}). Preview will be stopped after the image is 913 * taken; callers must call {@link #startPreview()} again if they want to 914 * re-start preview or take more pictures. This should not be called between 915 * {@link android.media.MediaRecorder#start()} and 916 * {@link android.media.MediaRecorder#stop()}. 917 * 918 * <p>After calling this method, you must not call {@link #startPreview()} 919 * or take another picture until the JPEG callback has returned. 920 * 921 * @param shutter the callback for image capture moment, or null 922 * @param raw the callback for raw (uncompressed) image data, or null 923 * @param postview callback with postview image data, may be null 924 * @param jpeg the callback for JPEG image data, or null 925 */ 926 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 927 PictureCallback postview, PictureCallback jpeg) { 928 mShutterCallback = shutter; 929 mRawImageCallback = raw; 930 mPostviewCallback = postview; 931 mJpegCallback = jpeg; 932 933 // If callback is not set, do not send me callbacks. 934 int msgType = 0; 935 if (mShutterCallback != null) { 936 msgType |= CAMERA_MSG_SHUTTER; 937 } 938 if (mRawImageCallback != null) { 939 msgType |= CAMERA_MSG_RAW_IMAGE; 940 } 941 if (mPostviewCallback != null) { 942 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 943 } 944 if (mJpegCallback != null) { 945 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 946 } 947 948 native_takePicture(msgType); 949 } 950 951 /** 952 * Zooms to the requested value smoothly. The driver will notify {@link 953 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 954 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 955 * is called with value 3. The 956 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 957 * method will be called three times with zoom values 1, 2, and 3. 958 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 959 * Applications should not call startSmoothZoom again or change the zoom 960 * value before zoom stops. If the supplied zoom value equals to the current 961 * zoom value, no zoom callback will be generated. This method is supported 962 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 963 * returns true. 964 * 965 * @param value zoom value. The valid range is 0 to {@link 966 * android.hardware.Camera.Parameters#getMaxZoom}. 967 * @throws IllegalArgumentException if the zoom value is invalid. 968 * @throws RuntimeException if the method fails. 969 * @see #setZoomChangeListener(OnZoomChangeListener) 970 */ 971 public native final void startSmoothZoom(int value); 972 973 /** 974 * Stops the smooth zoom. Applications should wait for the {@link 975 * OnZoomChangeListener} to know when the zoom is actually stopped. This 976 * method is supported if {@link 977 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 978 * 979 * @throws RuntimeException if the method fails. 980 */ 981 public native final void stopSmoothZoom(); 982 983 /** 984 * Set the clockwise rotation of preview display in degrees. This affects 985 * the preview frames and the picture displayed after snapshot. This method 986 * is useful for portrait mode applications. Note that preview display of 987 * front-facing cameras is flipped horizontally before the rotation, that 988 * is, the image is reflected along the central vertical axis of the camera 989 * sensor. So the users can see themselves as looking into a mirror. 990 * 991 * <p>This does not affect the order of byte array passed in {@link 992 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 993 * method is not allowed to be called during preview. 994 * 995 * <p>If you want to make the camera image show in the same orientation as 996 * the display, you can use the following code. 997 * <pre> 998 * public static void setCameraDisplayOrientation(Activity activity, 999 * int cameraId, android.hardware.Camera camera) { 1000 * android.hardware.Camera.CameraInfo info = 1001 * new android.hardware.Camera.CameraInfo(); 1002 * android.hardware.Camera.getCameraInfo(cameraId, info); 1003 * int rotation = activity.getWindowManager().getDefaultDisplay() 1004 * .getRotation(); 1005 * int degrees = 0; 1006 * switch (rotation) { 1007 * case Surface.ROTATION_0: degrees = 0; break; 1008 * case Surface.ROTATION_90: degrees = 90; break; 1009 * case Surface.ROTATION_180: degrees = 180; break; 1010 * case Surface.ROTATION_270: degrees = 270; break; 1011 * } 1012 * 1013 * int result; 1014 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1015 * result = (info.orientation + degrees) % 360; 1016 * result = (360 - result) % 360; // compensate the mirror 1017 * } else { // back-facing 1018 * result = (info.orientation - degrees + 360) % 360; 1019 * } 1020 * camera.setDisplayOrientation(result); 1021 * } 1022 * </pre> 1023 * @param degrees the angle that the picture will be rotated clockwise. 1024 * Valid values are 0, 90, 180, and 270. The starting 1025 * position is 0 (landscape). 1026 * @see #setPreviewDisplay(SurfaceHolder) 1027 */ 1028 public native final void setDisplayOrientation(int degrees); 1029 1030 /** 1031 * Callback interface for zoom changes during a smooth zoom operation. 1032 * 1033 * @see #setZoomChangeListener(OnZoomChangeListener) 1034 * @see #startSmoothZoom(int) 1035 */ 1036 public interface OnZoomChangeListener 1037 { 1038 /** 1039 * Called when the zoom value has changed during a smooth zoom. 1040 * 1041 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1042 * calls this for every new zoom value. 1043 * @param stopped whether smooth zoom is stopped. If the value is true, 1044 * this is the last zoom update for the application. 1045 * @param camera the Camera service object 1046 */ 1047 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1048 }; 1049 1050 /** 1051 * Registers a listener to be notified when the zoom value is updated by the 1052 * camera driver during smooth zoom. 1053 * 1054 * @param listener the listener to notify 1055 * @see #startSmoothZoom(int) 1056 */ 1057 public final void setZoomChangeListener(OnZoomChangeListener listener) 1058 { 1059 mZoomListener = listener; 1060 } 1061 1062 /** 1063 * Callback interface for face detected in the preview frame. 1064 * 1065 */ 1066 public interface FaceDetectionListener 1067 { 1068 /** 1069 * Notify the listener of the detected faces in the preview frame. 1070 * 1071 * @param faces the detected faces. The list is sorted by the score. 1072 * The highest score is the first element. 1073 * @param camera the Camera service object 1074 */ 1075 void onFaceDetection(Face[] faces, Camera camera); 1076 } 1077 1078 /** 1079 * Registers a listener to be notified about the faces detected in the 1080 * preview frame. 1081 * 1082 * @param listener the listener to notify 1083 * @see #startFaceDetection() 1084 */ 1085 public final void setFaceDetectionListener(FaceDetectionListener listener) 1086 { 1087 mFaceListener = listener; 1088 } 1089 1090 /** 1091 * Starts the face detection. This should be called after preview is started. 1092 * The camera will notify {@link FaceDetectionListener} of the detected 1093 * faces in the preview frame. The detected faces may be the same as the 1094 * previous ones. Applications should call {@link #stopFaceDetection} to 1095 * stop the face detection. This method is supported if {@link 1096 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1097 * If the face detection has started, apps should not call this again. 1098 * 1099 * When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1100 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1101 * have no effect. 1102 * 1103 * @throws IllegalArgumentException if the face detection is unsupported. 1104 * @throws RuntimeException if the method fails or the face detection is 1105 * already running. 1106 * @see FaceDetectionListener 1107 * @see #stopFaceDetection() 1108 * @see Parameters#getMaxNumDetectedFaces() 1109 */ 1110 public final void startFaceDetection() { 1111 if (mFaceDetectionRunning) { 1112 throw new RuntimeException("Face detection is already running"); 1113 } 1114 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1115 mFaceDetectionRunning = true; 1116 } 1117 1118 /** 1119 * Stops the face detection. 1120 * 1121 * @see #startFaceDetection(int) 1122 */ 1123 public final void stopFaceDetection() { 1124 _stopFaceDetection(); 1125 mFaceDetectionRunning = false; 1126 } 1127 1128 private native final void _startFaceDetection(int type); 1129 private native final void _stopFaceDetection(); 1130 1131 /** 1132 * The information of a face from camera face detection. 1133 * 1134 */ 1135 public static class Face { 1136 /** 1137 * Create an empty face. 1138 */ 1139 public Face() { 1140 } 1141 1142 /** 1143 * Bounds of the face. (-1000, -1000) represents the top-left of the 1144 * camera field of view, and (1000, 1000) represents the bottom-right of 1145 * the field of view. For example, suppose the size of the viewfinder UI 1146 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1147 * The corresponding viewfinder rect should be (0, 0, 400, 240). The 1148 * width and height of the rect will not be 0 or negative. 1149 * 1150 * <p>The direction is relative to the sensor orientation, that is, what 1151 * the sensor sees. The direction is not affected by the rotation or 1152 * mirroring of {@link #setDisplayOrientation(int)}.</p> 1153 * 1154 * @see #startFaceDetection(int) 1155 */ 1156 public Rect rect; 1157 1158 /** 1159 * The confidence level of the face. The range is 1 to 100. 100 is the 1160 * highest confidence. 1161 * 1162 * @see #startFaceDetection(int) 1163 */ 1164 public int score; 1165 1166 /** 1167 * An unique id per face while the face is visible to the tracker. If 1168 * the face leaves the field-of-view and comes back, it will get a new 1169 * id. This is an optional field, may not be supported on all devices. 1170 * If not supported, id will always be set to -1. The optional fields 1171 * are supported as a set. Either they are all valid, or none of them 1172 * are. 1173 */ 1174 public int id = -1; 1175 1176 /** 1177 * The coordinates of the center of the left eye. The coordinates are in 1178 * the same space as the ones for {@link #rect}. This is an optional 1179 * field, may not be supported on all devices. If not supported, the 1180 * value will always be set to null. The optional fields are supported 1181 * as a set. Either they are all valid, or none of them are. 1182 */ 1183 public Point leftEye = null; 1184 1185 /** 1186 * The coordinates of the center of the right eye. The coordinates are 1187 * in the same space as the ones for {@link #rect}.This is an optional 1188 * field, may not be supported on all devices. If not supported, the 1189 * value will always be set to null. The optional fields are supported 1190 * as a set. Either they are all valid, or none of them are. 1191 */ 1192 public Point rightEye = null; 1193 1194 /** 1195 * The coordinates of the center of the mouth. The coordinates are in 1196 * the same space as the ones for {@link #rect}. This is an optional 1197 * field, may not be supported on all devices. If not supported, the 1198 * value will always be set to null. The optional fields are supported 1199 * as a set. Either they are all valid, or none of them are. 1200 */ 1201 public Point mouth = null; 1202 } 1203 1204 // Error codes match the enum in include/ui/Camera.h 1205 1206 /** 1207 * Unspecified camera error. 1208 * @see Camera.ErrorCallback 1209 */ 1210 public static final int CAMERA_ERROR_UNKNOWN = 1; 1211 1212 /** 1213 * Media server died. In this case, the application must release the 1214 * Camera object and instantiate a new one. 1215 * @see Camera.ErrorCallback 1216 */ 1217 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1218 1219 /** 1220 * Callback interface for camera error notification. 1221 * 1222 * @see #setErrorCallback(ErrorCallback) 1223 */ 1224 public interface ErrorCallback 1225 { 1226 /** 1227 * Callback for camera errors. 1228 * @param error error code: 1229 * <ul> 1230 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1231 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1232 * </ul> 1233 * @param camera the Camera service object 1234 */ 1235 void onError(int error, Camera camera); 1236 }; 1237 1238 /** 1239 * Registers a callback to be invoked when an error occurs. 1240 * @param cb The callback to run 1241 */ 1242 public final void setErrorCallback(ErrorCallback cb) 1243 { 1244 mErrorCallback = cb; 1245 } 1246 1247 private native final void native_setParameters(String params); 1248 private native final String native_getParameters(); 1249 1250 /** 1251 * Changes the settings for this Camera service. 1252 * 1253 * @param params the Parameters to use for this Camera service 1254 * @throws RuntimeException if any parameter is invalid or not supported. 1255 * @see #getParameters() 1256 */ 1257 public void setParameters(Parameters params) { 1258 native_setParameters(params.flatten()); 1259 } 1260 1261 /** 1262 * Returns the current settings for this Camera service. 1263 * If modifications are made to the returned Parameters, they must be passed 1264 * to {@link #setParameters(Camera.Parameters)} to take effect. 1265 * 1266 * @see #setParameters(Camera.Parameters) 1267 */ 1268 public Parameters getParameters() { 1269 Parameters p = new Parameters(); 1270 String s = native_getParameters(); 1271 p.unflatten(s); 1272 return p; 1273 } 1274 1275 /** 1276 * Image size (width and height dimensions). 1277 */ 1278 public class Size { 1279 /** 1280 * Sets the dimensions for pictures. 1281 * 1282 * @param w the photo width (pixels) 1283 * @param h the photo height (pixels) 1284 */ 1285 public Size(int w, int h) { 1286 width = w; 1287 height = h; 1288 } 1289 /** 1290 * Compares {@code obj} to this size. 1291 * 1292 * @param obj the object to compare this size with. 1293 * @return {@code true} if the width and height of {@code obj} is the 1294 * same as those of this size. {@code false} otherwise. 1295 */ 1296 @Override 1297 public boolean equals(Object obj) { 1298 if (!(obj instanceof Size)) { 1299 return false; 1300 } 1301 Size s = (Size) obj; 1302 return width == s.width && height == s.height; 1303 } 1304 @Override 1305 public int hashCode() { 1306 return width * 32713 + height; 1307 } 1308 /** width of the picture */ 1309 public int width; 1310 /** height of the picture */ 1311 public int height; 1312 }; 1313 1314 /** 1315 * <p>The Area class is used for choosing specific metering and focus areas for 1316 * the camera to use when calculating auto-exposure, auto-white balance, and 1317 * auto-focus.</p> 1318 * 1319 * <p>To find out how many simultaneous areas a given camera supports, use 1320 * {@link Parameters#getMaxNumMeteringAreas()} and 1321 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1322 * selection is unsupported, these methods will return 0.</p> 1323 * 1324 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1325 * that determines its importance. The bounds are relative to the camera's 1326 * current field of view. The coordinates are mapped so that (-1000, -1000) 1327 * is always the top-left corner of the current field of view, and (1000, 1328 * 1000) is always the bottom-right corner of the current field of 1329 * view. Setting Areas with bounds outside that range is not allowed. Areas 1330 * with zero or negative width or height are not allowed.</p> 1331 * 1332 * <p>The weight must range from 1 to 1000, and represents a weight for 1333 * every pixel in the area. This means that a large metering area with 1334 * the same weight as a smaller area will have more effect in the 1335 * metering result. Metering areas can overlap and the driver 1336 * will add the weights in the overlap region.</p> 1337 * 1338 * @see Parameters#setFocusAreas(List) 1339 * @see Parameters#getFocusAreas() 1340 * @see Parameters#getMaxNumFocusAreas() 1341 * @see Parameters#setMeteringAreas(List) 1342 * @see Parameters#getMeteringAreas() 1343 * @see Parameters#getMaxNumMeteringAreas() 1344 */ 1345 public static class Area { 1346 /** 1347 * Create an area with specified rectangle and weight. 1348 * 1349 * @param rect the bounds of the area. 1350 * @param weight the weight of the area. 1351 */ 1352 public Area(Rect rect, int weight) { 1353 this.rect = rect; 1354 this.weight = weight; 1355 } 1356 /** 1357 * Compares {@code obj} to this area. 1358 * 1359 * @param obj the object to compare this area with. 1360 * @return {@code true} if the rectangle and weight of {@code obj} is 1361 * the same as those of this area. {@code false} otherwise. 1362 */ 1363 @Override 1364 public boolean equals(Object obj) { 1365 if (!(obj instanceof Area)) { 1366 return false; 1367 } 1368 Area a = (Area) obj; 1369 if (rect == null) { 1370 if (a.rect != null) return false; 1371 } else { 1372 if (!rect.equals(a.rect)) return false; 1373 } 1374 return weight == a.weight; 1375 } 1376 1377 /** 1378 * Bounds of the area. (-1000, -1000) represents the top-left of the 1379 * camera field of view, and (1000, 1000) represents the bottom-right of 1380 * the field of view. Setting bounds outside that range is not 1381 * allowed. Bounds with zero or negative width or height are not 1382 * allowed. 1383 * 1384 * @see Parameters#getFocusAreas() 1385 * @see Parameters#getMeteringAreas() 1386 */ 1387 public Rect rect; 1388 1389 /** 1390 * Weight of the area. The weight must range from 1 to 1000, and 1391 * represents a weight for every pixel in the area. This means that a 1392 * large metering area with the same weight as a smaller area will have 1393 * more effect in the metering result. Metering areas can overlap and 1394 * the driver will add the weights in the overlap region. 1395 * 1396 * @see Parameters#getFocusAreas() 1397 * @see Parameters#getMeteringAreas() 1398 */ 1399 public int weight; 1400 } 1401 1402 /** 1403 * Camera service settings. 1404 * 1405 * <p>To make camera parameters take effect, applications have to call 1406 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1407 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1408 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1409 * is called with the changed parameters object. 1410 * 1411 * <p>Different devices may have different camera capabilities, such as 1412 * picture size or flash modes. The application should query the camera 1413 * capabilities before setting parameters. For example, the application 1414 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1415 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1416 * camera does not support color effects, 1417 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1418 */ 1419 public class Parameters { 1420 // Parameter keys to communicate with the camera driver. 1421 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1422 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1423 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1424 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1425 private static final String KEY_PICTURE_SIZE = "picture-size"; 1426 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1427 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1428 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1429 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1430 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1431 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1432 private static final String KEY_ROTATION = "rotation"; 1433 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1434 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1435 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1436 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1437 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1438 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1439 private static final String KEY_EFFECT = "effect"; 1440 private static final String KEY_ANTIBANDING = "antibanding"; 1441 private static final String KEY_SCENE_MODE = "scene-mode"; 1442 private static final String KEY_FLASH_MODE = "flash-mode"; 1443 private static final String KEY_FOCUS_MODE = "focus-mode"; 1444 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1445 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1446 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1447 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1448 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1449 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1450 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1451 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1452 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1453 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1454 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1455 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1456 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1457 private static final String KEY_METERING_AREAS = "metering-areas"; 1458 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1459 private static final String KEY_ZOOM = "zoom"; 1460 private static final String KEY_MAX_ZOOM = "max-zoom"; 1461 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1462 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1463 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1464 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1465 private static final String KEY_VIDEO_SIZE = "video-size"; 1466 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1467 "preferred-preview-size-for-video"; 1468 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 1469 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 1470 private static final String KEY_RECORDING_HINT = "recording-hint"; 1471 1472 // Parameter key suffix for supported values. 1473 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1474 1475 private static final String TRUE = "true"; 1476 private static final String FALSE = "false"; 1477 1478 // Values for white balance settings. 1479 public static final String WHITE_BALANCE_AUTO = "auto"; 1480 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1481 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1482 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1483 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1484 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1485 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1486 public static final String WHITE_BALANCE_SHADE = "shade"; 1487 1488 // Values for color effect settings. 1489 public static final String EFFECT_NONE = "none"; 1490 public static final String EFFECT_MONO = "mono"; 1491 public static final String EFFECT_NEGATIVE = "negative"; 1492 public static final String EFFECT_SOLARIZE = "solarize"; 1493 public static final String EFFECT_SEPIA = "sepia"; 1494 public static final String EFFECT_POSTERIZE = "posterize"; 1495 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1496 public static final String EFFECT_BLACKBOARD = "blackboard"; 1497 public static final String EFFECT_AQUA = "aqua"; 1498 1499 // Values for antibanding settings. 1500 public static final String ANTIBANDING_AUTO = "auto"; 1501 public static final String ANTIBANDING_50HZ = "50hz"; 1502 public static final String ANTIBANDING_60HZ = "60hz"; 1503 public static final String ANTIBANDING_OFF = "off"; 1504 1505 // Values for flash mode settings. 1506 /** 1507 * Flash will not be fired. 1508 */ 1509 public static final String FLASH_MODE_OFF = "off"; 1510 1511 /** 1512 * Flash will be fired automatically when required. The flash may be fired 1513 * during preview, auto-focus, or snapshot depending on the driver. 1514 */ 1515 public static final String FLASH_MODE_AUTO = "auto"; 1516 1517 /** 1518 * Flash will always be fired during snapshot. The flash may also be 1519 * fired during preview or auto-focus depending on the driver. 1520 */ 1521 public static final String FLASH_MODE_ON = "on"; 1522 1523 /** 1524 * Flash will be fired in red-eye reduction mode. 1525 */ 1526 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1527 1528 /** 1529 * Constant emission of light during preview, auto-focus and snapshot. 1530 * This can also be used for video recording. 1531 */ 1532 public static final String FLASH_MODE_TORCH = "torch"; 1533 1534 /** 1535 * Scene mode is off. 1536 */ 1537 public static final String SCENE_MODE_AUTO = "auto"; 1538 1539 /** 1540 * Take photos of fast moving objects. Same as {@link 1541 * #SCENE_MODE_SPORTS}. 1542 */ 1543 public static final String SCENE_MODE_ACTION = "action"; 1544 1545 /** 1546 * Take people pictures. 1547 */ 1548 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1549 1550 /** 1551 * Take pictures on distant objects. 1552 */ 1553 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1554 1555 /** 1556 * Take photos at night. 1557 */ 1558 public static final String SCENE_MODE_NIGHT = "night"; 1559 1560 /** 1561 * Take people pictures at night. 1562 */ 1563 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1564 1565 /** 1566 * Take photos in a theater. Flash light is off. 1567 */ 1568 public static final String SCENE_MODE_THEATRE = "theatre"; 1569 1570 /** 1571 * Take pictures on the beach. 1572 */ 1573 public static final String SCENE_MODE_BEACH = "beach"; 1574 1575 /** 1576 * Take pictures on the snow. 1577 */ 1578 public static final String SCENE_MODE_SNOW = "snow"; 1579 1580 /** 1581 * Take sunset photos. 1582 */ 1583 public static final String SCENE_MODE_SUNSET = "sunset"; 1584 1585 /** 1586 * Avoid blurry pictures (for example, due to hand shake). 1587 */ 1588 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1589 1590 /** 1591 * For shooting firework displays. 1592 */ 1593 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1594 1595 /** 1596 * Take photos of fast moving objects. Same as {@link 1597 * #SCENE_MODE_ACTION}. 1598 */ 1599 public static final String SCENE_MODE_SPORTS = "sports"; 1600 1601 /** 1602 * Take indoor low-light shot. 1603 */ 1604 public static final String SCENE_MODE_PARTY = "party"; 1605 1606 /** 1607 * Capture the naturally warm color of scenes lit by candles. 1608 */ 1609 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1610 1611 /** 1612 * Applications are looking for a barcode. Camera driver will be 1613 * optimized for barcode reading. 1614 */ 1615 public static final String SCENE_MODE_BARCODE = "barcode"; 1616 1617 /** 1618 * Auto-focus mode. Applications should call {@link 1619 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1620 */ 1621 public static final String FOCUS_MODE_AUTO = "auto"; 1622 1623 /** 1624 * Focus is set at infinity. Applications should not call 1625 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1626 */ 1627 public static final String FOCUS_MODE_INFINITY = "infinity"; 1628 1629 /** 1630 * Macro (close-up) focus mode. Applications should call 1631 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1632 * mode. 1633 */ 1634 public static final String FOCUS_MODE_MACRO = "macro"; 1635 1636 /** 1637 * Focus is fixed. The camera is always in this mode if the focus is not 1638 * adjustable. If the camera has auto-focus, this mode can fix the 1639 * focus, which is usually at hyperfocal distance. Applications should 1640 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1641 */ 1642 public static final String FOCUS_MODE_FIXED = "fixed"; 1643 1644 /** 1645 * Extended depth of field (EDOF). Focusing is done digitally and 1646 * continuously. Applications should not call {@link 1647 * #autoFocus(AutoFocusCallback)} in this mode. 1648 */ 1649 public static final String FOCUS_MODE_EDOF = "edof"; 1650 1651 /** 1652 * Continuous auto focus mode intended for video recording. The camera 1653 * continuously tries to focus. This is the best choice for video 1654 * recording because the focus changes smoothly . Applications still can 1655 * call {@link #takePicture(Camera.ShutterCallback, 1656 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 1657 * subject may not be in focus. Auto focus starts when the parameter is 1658 * set. Applications should not call {@link 1659 * #autoFocus(AutoFocusCallback)} in this mode. To stop continuous 1660 * focus, applications should change the focus mode to other modes. 1661 */ 1662 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1663 1664 /** 1665 * Continuous auto focus mode intended for taking pictures. The camera 1666 * continuously tries to focus. The speed of focus change is more 1667 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 1668 * starts when the parameter is set. If applications call {@link 1669 * #autoFocus(AutoFocusCallback)} in this mode, the focus callback will 1670 * immediately return with a boolean that indicates whether the focus is 1671 * sharp or not. The apps can then decide if they want to take a picture 1672 * immediately or to change the focus mode to auto, and run a full 1673 * autofocus cycle. To stop continuous focus, applications should change 1674 * the focus mode to other modes. 1675 * 1676 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 1677 */ 1678 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 1679 1680 // Indices for focus distance array. 1681 /** 1682 * The array index of near focus distance for use with 1683 * {@link #getFocusDistances(float[])}. 1684 */ 1685 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1686 1687 /** 1688 * The array index of optimal focus distance for use with 1689 * {@link #getFocusDistances(float[])}. 1690 */ 1691 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1692 1693 /** 1694 * The array index of far focus distance for use with 1695 * {@link #getFocusDistances(float[])}. 1696 */ 1697 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1698 1699 /** 1700 * The array index of minimum preview fps for use with {@link 1701 * #getPreviewFpsRange(int[])} or {@link 1702 * #getSupportedPreviewFpsRange()}. 1703 */ 1704 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1705 1706 /** 1707 * The array index of maximum preview fps for use with {@link 1708 * #getPreviewFpsRange(int[])} or {@link 1709 * #getSupportedPreviewFpsRange()}. 1710 */ 1711 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1712 1713 // Formats for setPreviewFormat and setPictureFormat. 1714 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1715 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1716 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1717 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1718 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1719 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1720 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 1721 1722 private HashMap<String, String> mMap; 1723 1724 private Parameters() { 1725 mMap = new HashMap<String, String>(); 1726 } 1727 1728 /** 1729 * Writes the current Parameters to the log. 1730 * @hide 1731 * @deprecated 1732 */ 1733 public void dump() { 1734 Log.e(TAG, "dump: size=" + mMap.size()); 1735 for (String k : mMap.keySet()) { 1736 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1737 } 1738 } 1739 1740 /** 1741 * Creates a single string with all the parameters set in 1742 * this Parameters object. 1743 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1744 * 1745 * @return a String with all values from this Parameters object, in 1746 * semi-colon delimited key-value pairs 1747 */ 1748 public String flatten() { 1749 StringBuilder flattened = new StringBuilder(); 1750 for (String k : mMap.keySet()) { 1751 flattened.append(k); 1752 flattened.append("="); 1753 flattened.append(mMap.get(k)); 1754 flattened.append(";"); 1755 } 1756 // chop off the extra semicolon at the end 1757 flattened.deleteCharAt(flattened.length()-1); 1758 return flattened.toString(); 1759 } 1760 1761 /** 1762 * Takes a flattened string of parameters and adds each one to 1763 * this Parameters object. 1764 * <p>The {@link #flatten()} method does the reverse.</p> 1765 * 1766 * @param flattened a String of parameters (key-value paired) that 1767 * are semi-colon delimited 1768 */ 1769 public void unflatten(String flattened) { 1770 mMap.clear(); 1771 1772 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1773 while (tokenizer.hasMoreElements()) { 1774 String kv = tokenizer.nextToken(); 1775 int pos = kv.indexOf('='); 1776 if (pos == -1) { 1777 continue; 1778 } 1779 String k = kv.substring(0, pos); 1780 String v = kv.substring(pos + 1); 1781 mMap.put(k, v); 1782 } 1783 } 1784 1785 public void remove(String key) { 1786 mMap.remove(key); 1787 } 1788 1789 /** 1790 * Sets a String parameter. 1791 * 1792 * @param key the key name for the parameter 1793 * @param value the String value of the parameter 1794 */ 1795 public void set(String key, String value) { 1796 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1797 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1798 return; 1799 } 1800 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1801 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1802 return; 1803 } 1804 1805 mMap.put(key, value); 1806 } 1807 1808 /** 1809 * Sets an integer parameter. 1810 * 1811 * @param key the key name for the parameter 1812 * @param value the int value of the parameter 1813 */ 1814 public void set(String key, int value) { 1815 mMap.put(key, Integer.toString(value)); 1816 } 1817 1818 private void set(String key, List<Area> areas) { 1819 if (areas == null) { 1820 set(key, "(0,0,0,0,0)"); 1821 } else { 1822 StringBuilder buffer = new StringBuilder(); 1823 for (int i = 0; i < areas.size(); i++) { 1824 Area area = areas.get(i); 1825 Rect rect = area.rect; 1826 buffer.append('('); 1827 buffer.append(rect.left); 1828 buffer.append(','); 1829 buffer.append(rect.top); 1830 buffer.append(','); 1831 buffer.append(rect.right); 1832 buffer.append(','); 1833 buffer.append(rect.bottom); 1834 buffer.append(','); 1835 buffer.append(area.weight); 1836 buffer.append(')'); 1837 if (i != areas.size() - 1) buffer.append(','); 1838 } 1839 set(key, buffer.toString()); 1840 } 1841 } 1842 1843 /** 1844 * Returns the value of a String parameter. 1845 * 1846 * @param key the key name for the parameter 1847 * @return the String value of the parameter 1848 */ 1849 public String get(String key) { 1850 return mMap.get(key); 1851 } 1852 1853 /** 1854 * Returns the value of an integer parameter. 1855 * 1856 * @param key the key name for the parameter 1857 * @return the int value of the parameter 1858 */ 1859 public int getInt(String key) { 1860 return Integer.parseInt(mMap.get(key)); 1861 } 1862 1863 /** 1864 * Sets the dimensions for preview pictures. If the preview has already 1865 * started, applications should stop the preview first before changing 1866 * preview size. 1867 * 1868 * The sides of width and height are based on camera orientation. That 1869 * is, the preview size is the size before it is rotated by display 1870 * orientation. So applications need to consider the display orientation 1871 * while setting preview size. For example, suppose the camera supports 1872 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1873 * preview ratio. If the display orientation is set to 0 or 180, preview 1874 * size should be set to 480x320. If the display orientation is set to 1875 * 90 or 270, preview size should be set to 320x480. The display 1876 * orientation should also be considered while setting picture size and 1877 * thumbnail size. 1878 * 1879 * @param width the width of the pictures, in pixels 1880 * @param height the height of the pictures, in pixels 1881 * @see #setDisplayOrientation(int) 1882 * @see #getCameraInfo(int, CameraInfo) 1883 * @see #setPictureSize(int, int) 1884 * @see #setJpegThumbnailSize(int, int) 1885 */ 1886 public void setPreviewSize(int width, int height) { 1887 String v = Integer.toString(width) + "x" + Integer.toString(height); 1888 set(KEY_PREVIEW_SIZE, v); 1889 } 1890 1891 /** 1892 * Returns the dimensions setting for preview pictures. 1893 * 1894 * @return a Size object with the width and height setting 1895 * for the preview picture 1896 */ 1897 public Size getPreviewSize() { 1898 String pair = get(KEY_PREVIEW_SIZE); 1899 return strToSize(pair); 1900 } 1901 1902 /** 1903 * Gets the supported preview sizes. 1904 * 1905 * @return a list of Size object. This method will always return a list 1906 * with at least one element. 1907 */ 1908 public List<Size> getSupportedPreviewSizes() { 1909 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1910 return splitSize(str); 1911 } 1912 1913 /** 1914 * <p>Gets the supported video frame sizes that can be used by 1915 * MediaRecorder.</p> 1916 * 1917 * <p>If the returned list is not null, the returned list will contain at 1918 * least one Size and one of the sizes in the returned list must be 1919 * passed to MediaRecorder.setVideoSize() for camcorder application if 1920 * camera is used as the video source. In this case, the size of the 1921 * preview can be different from the resolution of the recorded video 1922 * during video recording.</p> 1923 * 1924 * @return a list of Size object if camera has separate preview and 1925 * video output; otherwise, null is returned. 1926 * @see #getPreferredPreviewSizeForVideo() 1927 */ 1928 public List<Size> getSupportedVideoSizes() { 1929 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1930 return splitSize(str); 1931 } 1932 1933 /** 1934 * Returns the preferred or recommended preview size (width and height) 1935 * in pixels for video recording. Camcorder applications should 1936 * set the preview size to a value that is not larger than the 1937 * preferred preview size. In other words, the product of the width 1938 * and height of the preview size should not be larger than that of 1939 * the preferred preview size. In addition, we recommend to choose a 1940 * preview size that has the same aspect ratio as the resolution of 1941 * video to be recorded. 1942 * 1943 * @return the preferred preview size (width and height) in pixels for 1944 * video recording if getSupportedVideoSizes() does not return 1945 * null; otherwise, null is returned. 1946 * @see #getSupportedVideoSizes() 1947 */ 1948 public Size getPreferredPreviewSizeForVideo() { 1949 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1950 return strToSize(pair); 1951 } 1952 1953 /** 1954 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1955 * applications set both width and height to 0, EXIF will not contain 1956 * thumbnail.</p> 1957 * 1958 * <p>Applications need to consider the display orientation. See {@link 1959 * #setPreviewSize(int,int)} for reference.</p> 1960 * 1961 * @param width the width of the thumbnail, in pixels 1962 * @param height the height of the thumbnail, in pixels 1963 * @see #setPreviewSize(int,int) 1964 */ 1965 public void setJpegThumbnailSize(int width, int height) { 1966 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1967 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1968 } 1969 1970 /** 1971 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1972 * 1973 * @return a Size object with the height and width setting for the EXIF 1974 * thumbnails 1975 */ 1976 public Size getJpegThumbnailSize() { 1977 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1978 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1979 } 1980 1981 /** 1982 * Gets the supported jpeg thumbnail sizes. 1983 * 1984 * @return a list of Size object. This method will always return a list 1985 * with at least two elements. Size 0,0 (no thumbnail) is always 1986 * supported. 1987 */ 1988 public List<Size> getSupportedJpegThumbnailSizes() { 1989 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1990 return splitSize(str); 1991 } 1992 1993 /** 1994 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1995 * 1996 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1997 * to 100, with 100 being the best. 1998 */ 1999 public void setJpegThumbnailQuality(int quality) { 2000 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2001 } 2002 2003 /** 2004 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2005 * 2006 * @return the JPEG quality setting of the EXIF thumbnail. 2007 */ 2008 public int getJpegThumbnailQuality() { 2009 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2010 } 2011 2012 /** 2013 * Sets Jpeg quality of captured picture. 2014 * 2015 * @param quality the JPEG quality of captured picture. The range is 1 2016 * to 100, with 100 being the best. 2017 */ 2018 public void setJpegQuality(int quality) { 2019 set(KEY_JPEG_QUALITY, quality); 2020 } 2021 2022 /** 2023 * Returns the quality setting for the JPEG picture. 2024 * 2025 * @return the JPEG picture quality setting. 2026 */ 2027 public int getJpegQuality() { 2028 return getInt(KEY_JPEG_QUALITY); 2029 } 2030 2031 /** 2032 * Sets the rate at which preview frames are received. This is the 2033 * target frame rate. The actual frame rate depends on the driver. 2034 * 2035 * @param fps the frame rate (frames per second) 2036 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2037 */ 2038 @Deprecated 2039 public void setPreviewFrameRate(int fps) { 2040 set(KEY_PREVIEW_FRAME_RATE, fps); 2041 } 2042 2043 /** 2044 * Returns the setting for the rate at which preview frames are 2045 * received. This is the target frame rate. The actual frame rate 2046 * depends on the driver. 2047 * 2048 * @return the frame rate setting (frames per second) 2049 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2050 */ 2051 @Deprecated 2052 public int getPreviewFrameRate() { 2053 return getInt(KEY_PREVIEW_FRAME_RATE); 2054 } 2055 2056 /** 2057 * Gets the supported preview frame rates. 2058 * 2059 * @return a list of supported preview frame rates. null if preview 2060 * frame rate setting is not supported. 2061 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2062 */ 2063 @Deprecated 2064 public List<Integer> getSupportedPreviewFrameRates() { 2065 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2066 return splitInt(str); 2067 } 2068 2069 /** 2070 * Sets the maximum and maximum preview fps. This controls the rate of 2071 * preview frames received in {@link PreviewCallback}. The minimum and 2072 * maximum preview fps must be one of the elements from {@link 2073 * #getSupportedPreviewFpsRange}. 2074 * 2075 * @param min the minimum preview fps (scaled by 1000). 2076 * @param max the maximum preview fps (scaled by 1000). 2077 * @throws RuntimeException if fps range is invalid. 2078 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2079 * @see #getSupportedPreviewFpsRange() 2080 */ 2081 public void setPreviewFpsRange(int min, int max) { 2082 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2083 } 2084 2085 /** 2086 * Returns the current minimum and maximum preview fps. The values are 2087 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2088 * 2089 * @return range the minimum and maximum preview fps (scaled by 1000). 2090 * @see #PREVIEW_FPS_MIN_INDEX 2091 * @see #PREVIEW_FPS_MAX_INDEX 2092 * @see #getSupportedPreviewFpsRange() 2093 */ 2094 public void getPreviewFpsRange(int[] range) { 2095 if (range == null || range.length != 2) { 2096 throw new IllegalArgumentException( 2097 "range must be an array with two elements."); 2098 } 2099 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2100 } 2101 2102 /** 2103 * Gets the supported preview fps (frame-per-second) ranges. Each range 2104 * contains a minimum fps and maximum fps. If minimum fps equals to 2105 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2106 * the camera outputs frames in auto frame rate. The actual frame rate 2107 * fluctuates between the minimum and the maximum. The values are 2108 * multiplied by 1000 and represented in integers. For example, if frame 2109 * rate is 26.623 frames per second, the value is 26623. 2110 * 2111 * @return a list of supported preview fps ranges. This method returns a 2112 * list with at least one element. Every element is an int array 2113 * of two values - minimum fps and maximum fps. The list is 2114 * sorted from small to large (first by maximum fps and then 2115 * minimum fps). 2116 * @see #PREVIEW_FPS_MIN_INDEX 2117 * @see #PREVIEW_FPS_MAX_INDEX 2118 */ 2119 public List<int[]> getSupportedPreviewFpsRange() { 2120 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2121 return splitRange(str); 2122 } 2123 2124 /** 2125 * Sets the image format for preview pictures. 2126 * <p>If this is never called, the default format will be 2127 * {@link android.graphics.ImageFormat#NV21}, which 2128 * uses the NV21 encoding format.</p> 2129 * 2130 * @param pixel_format the desired preview picture format, defined 2131 * by one of the {@link android.graphics.ImageFormat} constants. 2132 * (E.g., <var>ImageFormat.NV21</var> (default), 2133 * <var>ImageFormat.RGB_565</var>, or 2134 * <var>ImageFormat.JPEG</var>) 2135 * @see android.graphics.ImageFormat 2136 */ 2137 public void setPreviewFormat(int pixel_format) { 2138 String s = cameraFormatForPixelFormat(pixel_format); 2139 if (s == null) { 2140 throw new IllegalArgumentException( 2141 "Invalid pixel_format=" + pixel_format); 2142 } 2143 2144 set(KEY_PREVIEW_FORMAT, s); 2145 } 2146 2147 /** 2148 * Returns the image format for preview frames got from 2149 * {@link PreviewCallback}. 2150 * 2151 * @return the preview format. 2152 * @see android.graphics.ImageFormat 2153 */ 2154 public int getPreviewFormat() { 2155 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2156 } 2157 2158 /** 2159 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2160 * is always supported. {@link android.graphics.ImageFormat#YV12} 2161 * is always supported since API level 12. 2162 * 2163 * @return a list of supported preview formats. This method will always 2164 * return a list with at least one element. 2165 * @see android.graphics.ImageFormat 2166 */ 2167 public List<Integer> getSupportedPreviewFormats() { 2168 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2169 ArrayList<Integer> formats = new ArrayList<Integer>(); 2170 for (String s : split(str)) { 2171 int f = pixelFormatForCameraFormat(s); 2172 if (f == ImageFormat.UNKNOWN) continue; 2173 formats.add(f); 2174 } 2175 return formats; 2176 } 2177 2178 /** 2179 * <p>Sets the dimensions for pictures.</p> 2180 * 2181 * <p>Applications need to consider the display orientation. See {@link 2182 * #setPreviewSize(int,int)} for reference.</p> 2183 * 2184 * @param width the width for pictures, in pixels 2185 * @param height the height for pictures, in pixels 2186 * @see #setPreviewSize(int,int) 2187 * 2188 */ 2189 public void setPictureSize(int width, int height) { 2190 String v = Integer.toString(width) + "x" + Integer.toString(height); 2191 set(KEY_PICTURE_SIZE, v); 2192 } 2193 2194 /** 2195 * Returns the dimension setting for pictures. 2196 * 2197 * @return a Size object with the height and width setting 2198 * for pictures 2199 */ 2200 public Size getPictureSize() { 2201 String pair = get(KEY_PICTURE_SIZE); 2202 return strToSize(pair); 2203 } 2204 2205 /** 2206 * Gets the supported picture sizes. 2207 * 2208 * @return a list of supported picture sizes. This method will always 2209 * return a list with at least one element. 2210 */ 2211 public List<Size> getSupportedPictureSizes() { 2212 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2213 return splitSize(str); 2214 } 2215 2216 /** 2217 * Sets the image format for pictures. 2218 * 2219 * @param pixel_format the desired picture format 2220 * (<var>ImageFormat.NV21</var>, 2221 * <var>ImageFormat.RGB_565</var>, or 2222 * <var>ImageFormat.JPEG</var>) 2223 * @see android.graphics.ImageFormat 2224 */ 2225 public void setPictureFormat(int pixel_format) { 2226 String s = cameraFormatForPixelFormat(pixel_format); 2227 if (s == null) { 2228 throw new IllegalArgumentException( 2229 "Invalid pixel_format=" + pixel_format); 2230 } 2231 2232 set(KEY_PICTURE_FORMAT, s); 2233 } 2234 2235 /** 2236 * Returns the image format for pictures. 2237 * 2238 * @return the picture format 2239 * @see android.graphics.ImageFormat 2240 */ 2241 public int getPictureFormat() { 2242 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2243 } 2244 2245 /** 2246 * Gets the supported picture formats. 2247 * 2248 * @return supported picture formats. This method will always return a 2249 * list with at least one element. 2250 * @see android.graphics.ImageFormat 2251 */ 2252 public List<Integer> getSupportedPictureFormats() { 2253 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2254 ArrayList<Integer> formats = new ArrayList<Integer>(); 2255 for (String s : split(str)) { 2256 int f = pixelFormatForCameraFormat(s); 2257 if (f == ImageFormat.UNKNOWN) continue; 2258 formats.add(f); 2259 } 2260 return formats; 2261 } 2262 2263 private String cameraFormatForPixelFormat(int pixel_format) { 2264 switch(pixel_format) { 2265 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2266 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2267 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2268 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2269 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2270 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2271 case ImageFormat.BAYER_RGGB: return PIXEL_FORMAT_BAYER_RGGB; 2272 default: return null; 2273 } 2274 } 2275 2276 private int pixelFormatForCameraFormat(String format) { 2277 if (format == null) 2278 return ImageFormat.UNKNOWN; 2279 2280 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2281 return ImageFormat.NV16; 2282 2283 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2284 return ImageFormat.NV21; 2285 2286 if (format.equals(PIXEL_FORMAT_YUV422I)) 2287 return ImageFormat.YUY2; 2288 2289 if (format.equals(PIXEL_FORMAT_YUV420P)) 2290 return ImageFormat.YV12; 2291 2292 if (format.equals(PIXEL_FORMAT_RGB565)) 2293 return ImageFormat.RGB_565; 2294 2295 if (format.equals(PIXEL_FORMAT_JPEG)) 2296 return ImageFormat.JPEG; 2297 2298 return ImageFormat.UNKNOWN; 2299 } 2300 2301 /** 2302 * Sets the rotation angle in degrees relative to the orientation of 2303 * the camera. This affects the pictures returned from JPEG {@link 2304 * PictureCallback}. The camera driver may set orientation in the 2305 * EXIF header without rotating the picture. Or the driver may rotate 2306 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 2307 * the orientation in the EXIF header will be missing or 1 (row #0 is 2308 * top and column #0 is left side). 2309 * 2310 * <p>If applications want to rotate the picture to match the orientation 2311 * of what users see, apps should use {@link 2312 * android.view.OrientationEventListener} and {@link CameraInfo}. 2313 * The value from OrientationEventListener is relative to the natural 2314 * orientation of the device. CameraInfo.orientation is the angle 2315 * between camera orientation and natural device orientation. The sum 2316 * of the two is the rotation angle for back-facing camera. The 2317 * difference of the two is the rotation angle for front-facing camera. 2318 * Note that the JPEG pictures of front-facing cameras are not mirrored 2319 * as in preview display. 2320 * 2321 * <p>For example, suppose the natural orientation of the device is 2322 * portrait. The device is rotated 270 degrees clockwise, so the device 2323 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2324 * landscape and the top side of the camera sensor is aligned with the 2325 * right edge of the display in natural orientation. So the camera 2326 * orientation is 90. The rotation should be set to 0 (270 + 90). 2327 * 2328 * <p>The reference code is as follows. 2329 * 2330 * <pre> 2331 * public void onOrientationChanged(int orientation) { 2332 * if (orientation == ORIENTATION_UNKNOWN) return; 2333 * android.hardware.Camera.CameraInfo info = 2334 * new android.hardware.Camera.CameraInfo(); 2335 * android.hardware.Camera.getCameraInfo(cameraId, info); 2336 * orientation = (orientation + 45) / 90 * 90; 2337 * int rotation = 0; 2338 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2339 * rotation = (info.orientation - orientation + 360) % 360; 2340 * } else { // back-facing camera 2341 * rotation = (info.orientation + orientation) % 360; 2342 * } 2343 * mParameters.setRotation(rotation); 2344 * } 2345 * </pre> 2346 * 2347 * @param rotation The rotation angle in degrees relative to the 2348 * orientation of the camera. Rotation can only be 0, 2349 * 90, 180 or 270. 2350 * @throws IllegalArgumentException if rotation value is invalid. 2351 * @see android.view.OrientationEventListener 2352 * @see #getCameraInfo(int, CameraInfo) 2353 */ 2354 public void setRotation(int rotation) { 2355 if (rotation == 0 || rotation == 90 || rotation == 180 2356 || rotation == 270) { 2357 set(KEY_ROTATION, Integer.toString(rotation)); 2358 } else { 2359 throw new IllegalArgumentException( 2360 "Invalid rotation=" + rotation); 2361 } 2362 } 2363 2364 /** 2365 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2366 * header. 2367 * 2368 * @param latitude GPS latitude coordinate. 2369 */ 2370 public void setGpsLatitude(double latitude) { 2371 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2372 } 2373 2374 /** 2375 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2376 * header. 2377 * 2378 * @param longitude GPS longitude coordinate. 2379 */ 2380 public void setGpsLongitude(double longitude) { 2381 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2382 } 2383 2384 /** 2385 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2386 * 2387 * @param altitude GPS altitude in meters. 2388 */ 2389 public void setGpsAltitude(double altitude) { 2390 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2391 } 2392 2393 /** 2394 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2395 * 2396 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2397 * 1970). 2398 */ 2399 public void setGpsTimestamp(long timestamp) { 2400 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2401 } 2402 2403 /** 2404 * Sets GPS processing method. It will store up to 32 characters 2405 * in JPEG EXIF header. 2406 * 2407 * @param processing_method The processing method to get this location. 2408 */ 2409 public void setGpsProcessingMethod(String processing_method) { 2410 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2411 } 2412 2413 /** 2414 * Removes GPS latitude, longitude, altitude, and timestamp from the 2415 * parameters. 2416 */ 2417 public void removeGpsData() { 2418 remove(KEY_GPS_LATITUDE); 2419 remove(KEY_GPS_LONGITUDE); 2420 remove(KEY_GPS_ALTITUDE); 2421 remove(KEY_GPS_TIMESTAMP); 2422 remove(KEY_GPS_PROCESSING_METHOD); 2423 } 2424 2425 /** 2426 * Gets the current white balance setting. 2427 * 2428 * @return current white balance. null if white balance setting is not 2429 * supported. 2430 * @see #WHITE_BALANCE_AUTO 2431 * @see #WHITE_BALANCE_INCANDESCENT 2432 * @see #WHITE_BALANCE_FLUORESCENT 2433 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2434 * @see #WHITE_BALANCE_DAYLIGHT 2435 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2436 * @see #WHITE_BALANCE_TWILIGHT 2437 * @see #WHITE_BALANCE_SHADE 2438 * 2439 */ 2440 public String getWhiteBalance() { 2441 return get(KEY_WHITE_BALANCE); 2442 } 2443 2444 /** 2445 * Sets the white balance. Changing the setting will release the 2446 * auto-white balance lock. 2447 * 2448 * @param value new white balance. 2449 * @see #getWhiteBalance() 2450 * @see #setAutoWhiteBalanceLock() 2451 */ 2452 public void setWhiteBalance(String value) { 2453 set(KEY_WHITE_BALANCE, value); 2454 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 2455 } 2456 2457 /** 2458 * Gets the supported white balance. 2459 * 2460 * @return a list of supported white balance. null if white balance 2461 * setting is not supported. 2462 * @see #getWhiteBalance() 2463 */ 2464 public List<String> getSupportedWhiteBalance() { 2465 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2466 return split(str); 2467 } 2468 2469 /** 2470 * Gets the current color effect setting. 2471 * 2472 * @return current color effect. null if color effect 2473 * setting is not supported. 2474 * @see #EFFECT_NONE 2475 * @see #EFFECT_MONO 2476 * @see #EFFECT_NEGATIVE 2477 * @see #EFFECT_SOLARIZE 2478 * @see #EFFECT_SEPIA 2479 * @see #EFFECT_POSTERIZE 2480 * @see #EFFECT_WHITEBOARD 2481 * @see #EFFECT_BLACKBOARD 2482 * @see #EFFECT_AQUA 2483 */ 2484 public String getColorEffect() { 2485 return get(KEY_EFFECT); 2486 } 2487 2488 /** 2489 * Sets the current color effect setting. 2490 * 2491 * @param value new color effect. 2492 * @see #getColorEffect() 2493 */ 2494 public void setColorEffect(String value) { 2495 set(KEY_EFFECT, value); 2496 } 2497 2498 /** 2499 * Gets the supported color effects. 2500 * 2501 * @return a list of supported color effects. null if color effect 2502 * setting is not supported. 2503 * @see #getColorEffect() 2504 */ 2505 public List<String> getSupportedColorEffects() { 2506 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2507 return split(str); 2508 } 2509 2510 2511 /** 2512 * Gets the current antibanding setting. 2513 * 2514 * @return current antibanding. null if antibanding setting is not 2515 * supported. 2516 * @see #ANTIBANDING_AUTO 2517 * @see #ANTIBANDING_50HZ 2518 * @see #ANTIBANDING_60HZ 2519 * @see #ANTIBANDING_OFF 2520 */ 2521 public String getAntibanding() { 2522 return get(KEY_ANTIBANDING); 2523 } 2524 2525 /** 2526 * Sets the antibanding. 2527 * 2528 * @param antibanding new antibanding value. 2529 * @see #getAntibanding() 2530 */ 2531 public void setAntibanding(String antibanding) { 2532 set(KEY_ANTIBANDING, antibanding); 2533 } 2534 2535 /** 2536 * Gets the supported antibanding values. 2537 * 2538 * @return a list of supported antibanding values. null if antibanding 2539 * setting is not supported. 2540 * @see #getAntibanding() 2541 */ 2542 public List<String> getSupportedAntibanding() { 2543 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2544 return split(str); 2545 } 2546 2547 /** 2548 * Gets the current scene mode setting. 2549 * 2550 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2551 * setting is not supported. 2552 * @see #SCENE_MODE_AUTO 2553 * @see #SCENE_MODE_ACTION 2554 * @see #SCENE_MODE_PORTRAIT 2555 * @see #SCENE_MODE_LANDSCAPE 2556 * @see #SCENE_MODE_NIGHT 2557 * @see #SCENE_MODE_NIGHT_PORTRAIT 2558 * @see #SCENE_MODE_THEATRE 2559 * @see #SCENE_MODE_BEACH 2560 * @see #SCENE_MODE_SNOW 2561 * @see #SCENE_MODE_SUNSET 2562 * @see #SCENE_MODE_STEADYPHOTO 2563 * @see #SCENE_MODE_FIREWORKS 2564 * @see #SCENE_MODE_SPORTS 2565 * @see #SCENE_MODE_PARTY 2566 * @see #SCENE_MODE_CANDLELIGHT 2567 */ 2568 public String getSceneMode() { 2569 return get(KEY_SCENE_MODE); 2570 } 2571 2572 /** 2573 * Sets the scene mode. Changing scene mode may override other 2574 * parameters (such as flash mode, focus mode, white balance). For 2575 * example, suppose originally flash mode is on and supported flash 2576 * modes are on/off. In night scene mode, both flash mode and supported 2577 * flash mode may be changed to off. After setting scene mode, 2578 * applications should call getParameters to know if some parameters are 2579 * changed. 2580 * 2581 * @param value scene mode. 2582 * @see #getSceneMode() 2583 */ 2584 public void setSceneMode(String value) { 2585 set(KEY_SCENE_MODE, value); 2586 } 2587 2588 /** 2589 * Gets the supported scene modes. 2590 * 2591 * @return a list of supported scene modes. null if scene mode setting 2592 * is not supported. 2593 * @see #getSceneMode() 2594 */ 2595 public List<String> getSupportedSceneModes() { 2596 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2597 return split(str); 2598 } 2599 2600 /** 2601 * Gets the current flash mode setting. 2602 * 2603 * @return current flash mode. null if flash mode setting is not 2604 * supported. 2605 * @see #FLASH_MODE_OFF 2606 * @see #FLASH_MODE_AUTO 2607 * @see #FLASH_MODE_ON 2608 * @see #FLASH_MODE_RED_EYE 2609 * @see #FLASH_MODE_TORCH 2610 */ 2611 public String getFlashMode() { 2612 return get(KEY_FLASH_MODE); 2613 } 2614 2615 /** 2616 * Sets the flash mode. 2617 * 2618 * @param value flash mode. 2619 * @see #getFlashMode() 2620 */ 2621 public void setFlashMode(String value) { 2622 set(KEY_FLASH_MODE, value); 2623 } 2624 2625 /** 2626 * Gets the supported flash modes. 2627 * 2628 * @return a list of supported flash modes. null if flash mode setting 2629 * is not supported. 2630 * @see #getFlashMode() 2631 */ 2632 public List<String> getSupportedFlashModes() { 2633 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2634 return split(str); 2635 } 2636 2637 /** 2638 * Gets the current focus mode setting. 2639 * 2640 * @return current focus mode. This method will always return a non-null 2641 * value. Applications should call {@link 2642 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2643 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2644 * @see #FOCUS_MODE_AUTO 2645 * @see #FOCUS_MODE_INFINITY 2646 * @see #FOCUS_MODE_MACRO 2647 * @see #FOCUS_MODE_FIXED 2648 * @see #FOCUS_MODE_EDOF 2649 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2650 */ 2651 public String getFocusMode() { 2652 return get(KEY_FOCUS_MODE); 2653 } 2654 2655 /** 2656 * Sets the focus mode. 2657 * 2658 * @param value focus mode. 2659 * @see #getFocusMode() 2660 */ 2661 public void setFocusMode(String value) { 2662 set(KEY_FOCUS_MODE, value); 2663 } 2664 2665 /** 2666 * Gets the supported focus modes. 2667 * 2668 * @return a list of supported focus modes. This method will always 2669 * return a list with at least one element. 2670 * @see #getFocusMode() 2671 */ 2672 public List<String> getSupportedFocusModes() { 2673 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2674 return split(str); 2675 } 2676 2677 /** 2678 * Gets the focal length (in millimeter) of the camera. 2679 * 2680 * @return the focal length. This method will always return a valid 2681 * value. 2682 */ 2683 public float getFocalLength() { 2684 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2685 } 2686 2687 /** 2688 * Gets the horizontal angle of view in degrees. 2689 * 2690 * @return horizontal angle of view. This method will always return a 2691 * valid value. 2692 */ 2693 public float getHorizontalViewAngle() { 2694 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2695 } 2696 2697 /** 2698 * Gets the vertical angle of view in degrees. 2699 * 2700 * @return vertical angle of view. This method will always return a 2701 * valid value. 2702 */ 2703 public float getVerticalViewAngle() { 2704 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2705 } 2706 2707 /** 2708 * Gets the current exposure compensation index. 2709 * 2710 * @return current exposure compensation index. The range is {@link 2711 * #getMinExposureCompensation} to {@link 2712 * #getMaxExposureCompensation}. 0 means exposure is not 2713 * adjusted. 2714 */ 2715 public int getExposureCompensation() { 2716 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2717 } 2718 2719 /** 2720 * Sets the exposure compensation index. 2721 * 2722 * @param value exposure compensation index. The valid value range is 2723 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2724 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2725 * not adjusted. Application should call 2726 * getMinExposureCompensation and getMaxExposureCompensation to 2727 * know if exposure compensation is supported. 2728 */ 2729 public void setExposureCompensation(int value) { 2730 set(KEY_EXPOSURE_COMPENSATION, value); 2731 } 2732 2733 /** 2734 * Gets the maximum exposure compensation index. 2735 * 2736 * @return maximum exposure compensation index (>=0). If both this 2737 * method and {@link #getMinExposureCompensation} return 0, 2738 * exposure compensation is not supported. 2739 */ 2740 public int getMaxExposureCompensation() { 2741 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2742 } 2743 2744 /** 2745 * Gets the minimum exposure compensation index. 2746 * 2747 * @return minimum exposure compensation index (<=0). If both this 2748 * method and {@link #getMaxExposureCompensation} return 0, 2749 * exposure compensation is not supported. 2750 */ 2751 public int getMinExposureCompensation() { 2752 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2753 } 2754 2755 /** 2756 * Gets the exposure compensation step. 2757 * 2758 * @return exposure compensation step. Applications can get EV by 2759 * multiplying the exposure compensation index and step. Ex: if 2760 * exposure compensation index is -6 and step is 0.333333333, EV 2761 * is -2. 2762 */ 2763 public float getExposureCompensationStep() { 2764 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2765 } 2766 2767 /** 2768 * <p>Sets the auto-exposure lock state. Applications should check 2769 * {@link #isAutoExposureLockSupported} before using this method.</p> 2770 * 2771 * <p>If set to true, the camera auto-exposure routine will immediately 2772 * pause until the lock is set to false. Exposure compensation settings 2773 * changes will still take effect while auto-exposure is locked.</p> 2774 * 2775 * <p>If auto-exposure is already locked, setting this to true again has 2776 * no effect (the driver will not recalculate exposure values).</p> 2777 * 2778 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2779 * image capture with {@link #takePicture(Camera.ShutterCallback, 2780 * Camera.PictureCallback, Camera.PictureCallback)}, will automatically 2781 * set the lock to false. However, the lock can be re-enabled before 2782 * preview is re-started to keep the same AE parameters.</p> 2783 * 2784 * <p>Exposure compensation, in conjunction with re-enabling the AE and 2785 * AWB locks after each still capture, can be used to capture an 2786 * exposure-bracketed burst of images, for example.</p> 2787 * 2788 * <p>Auto-exposure state, including the lock state, will not be 2789 * maintained after camera {@link #release()} is called. Locking 2790 * auto-exposure after {@link #open()} but before the first call to 2791 * {@link #startPreview()} will not allow the auto-exposure routine to 2792 * run at all, and may result in severely over- or under-exposed 2793 * images.</p> 2794 * 2795 * <p>The driver may also independently lock auto-exposure after 2796 * auto-focus completes. If this is undesirable, be sure to always set 2797 * the auto-exposure lock to false after the 2798 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2799 * received. The {@link #getAutoExposureLock()} method can be used after 2800 * the callback to determine if the camera has locked auto-exposure 2801 * independently.</p> 2802 * 2803 * @param toggle new state of the auto-exposure lock. True means that 2804 * auto-exposure is locked, false means that the auto-exposure 2805 * routine is free to run normally. 2806 * 2807 * @see #getAutoExposureLock() 2808 */ 2809 public void setAutoExposureLock(boolean toggle) { 2810 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 2811 } 2812 2813 /** 2814 * Gets the state of the auto-exposure lock. Applications should check 2815 * {@link #isAutoExposureLockSupported} before using this method. See 2816 * {@link #setAutoExposureLock} for details about the lock. 2817 * 2818 * @return State of the auto-exposure lock. Returns true if 2819 * auto-exposure is currently locked, and false otherwise. The 2820 * auto-exposure lock may be independently enabled by the camera 2821 * subsystem when auto-focus has completed. This method can be 2822 * used after the {@link AutoFocusCallback#onAutoFocus(boolean, 2823 * Camera)} callback to determine if the camera has locked AE. 2824 * 2825 * @see #setAutoExposureLock(boolean) 2826 * 2827 */ 2828 public boolean getAutoExposureLock() { 2829 String str = get(KEY_AUTO_EXPOSURE_LOCK); 2830 return TRUE.equals(str); 2831 } 2832 2833 /** 2834 * Returns true if auto-exposure locking is supported. Applications 2835 * should call this before trying to lock auto-exposure. See 2836 * {@link #setAutoExposureLock} for details about the lock. 2837 * 2838 * @return true if auto-exposure lock is supported. 2839 * @see #setAutoExposureLock(boolean) 2840 * 2841 */ 2842 public boolean isAutoExposureLockSupported() { 2843 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 2844 return TRUE.equals(str); 2845 } 2846 2847 /** 2848 * <p>Sets the auto-white balance lock state. Applications should check 2849 * {@link #isAutoWhiteBalanceLockSupported} before using this 2850 * method.</p> 2851 * 2852 * <p>If set to true, the camera auto-white balance routine will 2853 * immediately pause until the lock is set to false.</p> 2854 * 2855 * <p>If auto-white balance is already locked, setting this to true 2856 * again has no effect (the driver will not recalculate white balance 2857 * values).</p> 2858 * 2859 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2860 * image capture with {@link #takePicture(Camera.ShutterCallback, 2861 * Camera.PictureCallback, Camera.PictureCallback)}, will automatically 2862 * set the lock to false. However, the lock can be re-enabled before 2863 * preview is re-started to keep the same white balance parameters.</p> 2864 * 2865 * <p> Changing the white balance mode with {@link #setWhiteBalance} 2866 * will release the auto-white balance lock if it is set.</p> 2867 * 2868 * <p>Exposure compensation, in conjunction with re-enabling the AE and 2869 * AWB locks after each still capture, can be used to capture an 2870 * exposure-bracketed burst of images, for example. Auto-white balance 2871 * state, including the lock state, will not be maintained after camera 2872 * {@link #release()} is called. Locking auto-white balance after 2873 * {@link #open()} but before the first call to {@link #startPreview()} 2874 * will not allow the auto-white balance routine to run at all, and may 2875 * result in severely incorrect color in captured images.</p> 2876 * 2877 * <p>The driver may also independently lock auto-white balance after 2878 * auto-focus completes. If this is undesirable, be sure to always set 2879 * the auto-white balance lock to false after the 2880 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2881 * received. The {@link #getAutoWhiteBalanceLock()} method can be used 2882 * after the callback to determine if the camera has locked auto-white 2883 * balance independently.</p> 2884 * 2885 * @param toggle new state of the auto-white balance lock. True means 2886 * that auto-white balance is locked, false means that the 2887 * auto-white balance routine is free to run normally. 2888 * 2889 * @see #getAutoWhiteBalanceLock() 2890 * @see #setWhiteBalance(String) 2891 */ 2892 public void setAutoWhiteBalanceLock(boolean toggle) { 2893 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 2894 } 2895 2896 /** 2897 * Gets the state of the auto-white balance lock. Applications should 2898 * check {@link #isAutoWhiteBalanceLockSupported} before using this 2899 * method. See {@link #setAutoWhiteBalanceLock} for details about the 2900 * lock. 2901 * 2902 * @return State of the auto-white balance lock. Returns true if 2903 * auto-white balance is currently locked, and false 2904 * otherwise. The auto-white balance lock may be independently 2905 * enabled by the camera subsystem when auto-focus has 2906 * completed. This method can be used after the 2907 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 2908 * callback to determine if the camera has locked AWB. 2909 * 2910 * @see #setAutoWhiteBalanceLock(boolean) 2911 * 2912 */ 2913 public boolean getAutoWhiteBalanceLock() { 2914 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 2915 return TRUE.equals(str); 2916 } 2917 2918 /** 2919 * Returns true if auto-white balance locking is supported. Applications 2920 * should call this before trying to lock auto-white balance. See 2921 * {@link #setAutoWhiteBalanceLock} for details about the lock. 2922 * 2923 * @return true if auto-white balance lock is supported. 2924 * @see #setAutoWhiteBalanceLock(boolean) 2925 * 2926 */ 2927 public boolean isAutoWhiteBalanceLockSupported() { 2928 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 2929 return TRUE.equals(str); 2930 } 2931 2932 /** 2933 * Gets current zoom value. This also works when smooth zoom is in 2934 * progress. Applications should check {@link #isZoomSupported} before 2935 * using this method. 2936 * 2937 * @return the current zoom value. The range is 0 to {@link 2938 * #getMaxZoom}. 0 means the camera is not zoomed. 2939 */ 2940 public int getZoom() { 2941 return getInt(KEY_ZOOM, 0); 2942 } 2943 2944 /** 2945 * Sets current zoom value. If the camera is zoomed (value > 0), the 2946 * actual picture size may be smaller than picture size setting. 2947 * Applications can check the actual picture size after picture is 2948 * returned from {@link PictureCallback}. The preview size remains the 2949 * same in zoom. Applications should check {@link #isZoomSupported} 2950 * before using this method. 2951 * 2952 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2953 */ 2954 public void setZoom(int value) { 2955 set(KEY_ZOOM, value); 2956 } 2957 2958 /** 2959 * Returns true if zoom is supported. Applications should call this 2960 * before using other zoom methods. 2961 * 2962 * @return true if zoom is supported. 2963 */ 2964 public boolean isZoomSupported() { 2965 String str = get(KEY_ZOOM_SUPPORTED); 2966 return TRUE.equals(str); 2967 } 2968 2969 /** 2970 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2971 * value that applications can set to {@link #setZoom(int)}. 2972 * Applications should call {@link #isZoomSupported} before using this 2973 * method. This value may change in different preview size. Applications 2974 * should call this again after setting preview size. 2975 * 2976 * @return the maximum zoom value supported by the camera. 2977 */ 2978 public int getMaxZoom() { 2979 return getInt(KEY_MAX_ZOOM, 0); 2980 } 2981 2982 /** 2983 * Gets the zoom ratios of all zoom values. Applications should check 2984 * {@link #isZoomSupported} before using this method. 2985 * 2986 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2987 * returned as 320. The number of elements is {@link 2988 * #getMaxZoom} + 1. The list is sorted from small to large. The 2989 * first element is always 100. The last element is the zoom 2990 * ratio of the maximum zoom value. 2991 */ 2992 public List<Integer> getZoomRatios() { 2993 return splitInt(get(KEY_ZOOM_RATIOS)); 2994 } 2995 2996 /** 2997 * Returns true if smooth zoom is supported. Applications should call 2998 * this before using other smooth zoom methods. 2999 * 3000 * @return true if smooth zoom is supported. 3001 */ 3002 public boolean isSmoothZoomSupported() { 3003 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3004 return TRUE.equals(str); 3005 } 3006 3007 /** 3008 * <p>Gets the distances from the camera to where an object appears to be 3009 * in focus. The object is sharpest at the optimal focus distance. The 3010 * depth of field is the far focus distance minus near focus distance.</p> 3011 * 3012 * <p>Focus distances may change after calling {@link 3013 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3014 * #startPreview()}. Applications can call {@link #getParameters()} 3015 * and this method anytime to get the latest focus distances. If the 3016 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3017 * from time to time.</p> 3018 * 3019 * <p>This method is intended to estimate the distance between the camera 3020 * and the subject. After autofocus, the subject distance may be within 3021 * near and far focus distance. However, the precision depends on the 3022 * camera hardware, autofocus algorithm, the focus area, and the scene. 3023 * The error can be large and it should be only used as a reference.</p> 3024 * 3025 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3026 * If the focus distance is infinity, the value will be 3027 * {@code Float.POSITIVE_INFINITY}.</p> 3028 * 3029 * @param output focus distances in meters. output must be a float 3030 * array with three elements. Near focus distance, optimal focus 3031 * distance, and far focus distance will be filled in the array. 3032 * @see #FOCUS_DISTANCE_NEAR_INDEX 3033 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3034 * @see #FOCUS_DISTANCE_FAR_INDEX 3035 */ 3036 public void getFocusDistances(float[] output) { 3037 if (output == null || output.length != 3) { 3038 throw new IllegalArgumentException( 3039 "output must be an float array with three elements."); 3040 } 3041 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3042 } 3043 3044 /** 3045 * Gets the maximum number of focus areas supported. This is the maximum 3046 * length of the list in {@link #setFocusAreas(List)} and 3047 * {@link #getFocusAreas()}. 3048 * 3049 * @return the maximum number of focus areas supported by the camera. 3050 * @see #getFocusAreas() 3051 */ 3052 public int getMaxNumFocusAreas() { 3053 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3054 } 3055 3056 /** 3057 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3058 * focus.</p> 3059 * 3060 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3061 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3062 * focus areas first. If the value is 0, focus area is not supported.</p> 3063 * 3064 * <p>Each focus area is a rectangle with specified weight. The direction 3065 * is relative to the sensor orientation, that is, what the sensor sees. 3066 * The direction is not affected by the rotation or mirroring of 3067 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3068 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3069 * (1000, 1000) is the lower right point. The width and height of focus 3070 * areas cannot be 0 or negative.</p> 3071 * 3072 * <p>The weight must range from 1 to 1000. The weight should be 3073 * interpreted as a per-pixel weight - all pixels in the area have the 3074 * specified weight. This means a small area with the same weight as a 3075 * larger area will have less influence on the focusing than the larger 3076 * area. Focus areas can partially overlap and the driver will add the 3077 * weights in the overlap region.</p> 3078 * 3079 * <p>A special case of a {@code null} focus area list means the driver is 3080 * free to select focus targets as it wants. For example, the driver may 3081 * use more signals to select focus areas and change them 3082 * dynamically. Apps can set the focus area list to {@code null} if they 3083 * want the driver to completely control focusing.</p> 3084 * 3085 * <p>Focus areas are relative to the current field of view 3086 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3087 * represents the top of the currently visible camera frame. The focus 3088 * area cannot be set to be outside the current field of view, even 3089 * when using zoom.</p> 3090 * 3091 * <p>Focus area only has effect if the current focus mode is 3092 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, or 3093 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}.</p> 3094 * 3095 * @return a list of current focus areas 3096 */ 3097 public List<Area> getFocusAreas() { 3098 return splitArea(get(KEY_FOCUS_AREAS)); 3099 } 3100 3101 /** 3102 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3103 * 3104 * @param focusAreas the focus areas 3105 * @see #getFocusAreas() 3106 */ 3107 public void setFocusAreas(List<Area> focusAreas) { 3108 set(KEY_FOCUS_AREAS, focusAreas); 3109 } 3110 3111 /** 3112 * Gets the maximum number of metering areas supported. This is the 3113 * maximum length of the list in {@link #setMeteringAreas(List)} and 3114 * {@link #getMeteringAreas()}. 3115 * 3116 * @return the maximum number of metering areas supported by the camera. 3117 * @see #getMeteringAreas() 3118 */ 3119 public int getMaxNumMeteringAreas() { 3120 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3121 } 3122 3123 /** 3124 * <p>Gets the current metering areas. Camera driver uses these areas to 3125 * decide exposure.</p> 3126 * 3127 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3128 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3129 * metering areas first. If the value is 0, metering area is not 3130 * supported.</p> 3131 * 3132 * <p>Each metering area is a rectangle with specified weight. The 3133 * direction is relative to the sensor orientation, that is, what the 3134 * sensor sees. The direction is not affected by the rotation or 3135 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3136 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3137 * point. (1000, 1000) is the lower right point. The width and height of 3138 * metering areas cannot be 0 or negative.</p> 3139 * 3140 * <p>The weight must range from 1 to 1000, and represents a weight for 3141 * every pixel in the area. This means that a large metering area with 3142 * the same weight as a smaller area will have more effect in the 3143 * metering result. Metering areas can partially overlap and the driver 3144 * will add the weights in the overlap region.</p> 3145 * 3146 * <p>A special case of a {@code null} metering area list means the driver 3147 * is free to meter as it chooses. For example, the driver may use more 3148 * signals to select metering areas and change them dynamically. Apps 3149 * can set the metering area list to {@code null} if they want the 3150 * driver to completely control metering.</p> 3151 * 3152 * <p>Metering areas are relative to the current field of view 3153 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3154 * represents the top of the currently visible camera frame. The 3155 * metering area cannot be set to be outside the current field of view, 3156 * even when using zoom.</p> 3157 * 3158 * <p>No matter what metering areas are, the final exposure are compensated 3159 * by {@link #setExposureCompensation(int)}.</p> 3160 * 3161 * @return a list of current metering areas 3162 */ 3163 public List<Area> getMeteringAreas() { 3164 return splitArea(get(KEY_METERING_AREAS)); 3165 } 3166 3167 /** 3168 * Sets metering areas. See {@link #getMeteringAreas()} for 3169 * documentation. 3170 * 3171 * @param meteringAreas the metering areas 3172 * @see #getMeteringAreas() 3173 */ 3174 public void setMeteringAreas(List<Area> meteringAreas) { 3175 set(KEY_METERING_AREAS, meteringAreas); 3176 } 3177 3178 /** 3179 * Gets the maximum number of detected faces supported. This is the 3180 * maximum length of the list returned from {@link FaceDetectionListener}. 3181 * If the return value is 0, face detection of the specified type is not 3182 * supported. 3183 * 3184 * @return the maximum number of detected face supported by the camera. 3185 * @see #startFaceDetection(int) 3186 */ 3187 public int getMaxNumDetectedFaces() { 3188 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3189 } 3190 3191 /** 3192 * Sets recording mode hint. This tells the camera that the intent of 3193 * the application is to record videos {@link 3194 * android.media.MediaRecorder#start()}, not to take still pictures 3195 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3196 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3197 * allow MediaRecorder.start() to start faster or with fewer glitches on 3198 * output. This should be called before starting preview for the best 3199 * result, but can be changed while the preview is active. The default 3200 * value is false. 3201 * 3202 * The app can still call takePicture() when the hint is true or call 3203 * MediaRecorder.start() when the hint is false. But the performance may 3204 * be worse. 3205 * 3206 * @param hint true if the apps intend to record videos using 3207 * {@link android.media.MediaRecorder}. 3208 */ 3209 public void setRecordingHint(boolean hint) { 3210 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3211 } 3212 3213 // Splits a comma delimited string to an ArrayList of String. 3214 // Return null if the passing string is null or the size is 0. 3215 private ArrayList<String> split(String str) { 3216 if (str == null) return null; 3217 3218 // Use StringTokenizer because it is faster than split. 3219 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3220 ArrayList<String> substrings = new ArrayList<String>(); 3221 while (tokenizer.hasMoreElements()) { 3222 substrings.add(tokenizer.nextToken()); 3223 } 3224 return substrings; 3225 } 3226 3227 // Splits a comma delimited string to an ArrayList of Integer. 3228 // Return null if the passing string is null or the size is 0. 3229 private ArrayList<Integer> splitInt(String str) { 3230 if (str == null) return null; 3231 3232 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3233 ArrayList<Integer> substrings = new ArrayList<Integer>(); 3234 while (tokenizer.hasMoreElements()) { 3235 String token = tokenizer.nextToken(); 3236 substrings.add(Integer.parseInt(token)); 3237 } 3238 if (substrings.size() == 0) return null; 3239 return substrings; 3240 } 3241 3242 private void splitInt(String str, int[] output) { 3243 if (str == null) return; 3244 3245 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3246 int index = 0; 3247 while (tokenizer.hasMoreElements()) { 3248 String token = tokenizer.nextToken(); 3249 output[index++] = Integer.parseInt(token); 3250 } 3251 } 3252 3253 // Splits a comma delimited string to an ArrayList of Float. 3254 private void splitFloat(String str, float[] output) { 3255 if (str == null) return; 3256 3257 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3258 int index = 0; 3259 while (tokenizer.hasMoreElements()) { 3260 String token = tokenizer.nextToken(); 3261 output[index++] = Float.parseFloat(token); 3262 } 3263 } 3264 3265 // Returns the value of a float parameter. 3266 private float getFloat(String key, float defaultValue) { 3267 try { 3268 return Float.parseFloat(mMap.get(key)); 3269 } catch (NumberFormatException ex) { 3270 return defaultValue; 3271 } 3272 } 3273 3274 // Returns the value of a integer parameter. 3275 private int getInt(String key, int defaultValue) { 3276 try { 3277 return Integer.parseInt(mMap.get(key)); 3278 } catch (NumberFormatException ex) { 3279 return defaultValue; 3280 } 3281 } 3282 3283 // Splits a comma delimited string to an ArrayList of Size. 3284 // Return null if the passing string is null or the size is 0. 3285 private ArrayList<Size> splitSize(String str) { 3286 if (str == null) return null; 3287 3288 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3289 ArrayList<Size> sizeList = new ArrayList<Size>(); 3290 while (tokenizer.hasMoreElements()) { 3291 Size size = strToSize(tokenizer.nextToken()); 3292 if (size != null) sizeList.add(size); 3293 } 3294 if (sizeList.size() == 0) return null; 3295 return sizeList; 3296 } 3297 3298 // Parses a string (ex: "480x320") to Size object. 3299 // Return null if the passing string is null. 3300 private Size strToSize(String str) { 3301 if (str == null) return null; 3302 3303 int pos = str.indexOf('x'); 3304 if (pos != -1) { 3305 String width = str.substring(0, pos); 3306 String height = str.substring(pos + 1); 3307 return new Size(Integer.parseInt(width), 3308 Integer.parseInt(height)); 3309 } 3310 Log.e(TAG, "Invalid size parameter string=" + str); 3311 return null; 3312 } 3313 3314 // Splits a comma delimited string to an ArrayList of int array. 3315 // Example string: "(10000,26623),(10000,30000)". Return null if the 3316 // passing string is null or the size is 0. 3317 private ArrayList<int[]> splitRange(String str) { 3318 if (str == null || str.charAt(0) != '(' 3319 || str.charAt(str.length() - 1) != ')') { 3320 Log.e(TAG, "Invalid range list string=" + str); 3321 return null; 3322 } 3323 3324 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3325 int endIndex, fromIndex = 1; 3326 do { 3327 int[] range = new int[2]; 3328 endIndex = str.indexOf("),(", fromIndex); 3329 if (endIndex == -1) endIndex = str.length() - 1; 3330 splitInt(str.substring(fromIndex, endIndex), range); 3331 rangeList.add(range); 3332 fromIndex = endIndex + 3; 3333 } while (endIndex != str.length() - 1); 3334 3335 if (rangeList.size() == 0) return null; 3336 return rangeList; 3337 } 3338 3339 // Splits a comma delimited string to an ArrayList of Area objects. 3340 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3341 // the passing string is null or the size is 0 or (0,0,0,0,0). 3342 private ArrayList<Area> splitArea(String str) { 3343 if (str == null || str.charAt(0) != '(' 3344 || str.charAt(str.length() - 1) != ')') { 3345 Log.e(TAG, "Invalid area string=" + str); 3346 return null; 3347 } 3348 3349 ArrayList<Area> result = new ArrayList<Area>(); 3350 int endIndex, fromIndex = 1; 3351 int[] array = new int[5]; 3352 do { 3353 endIndex = str.indexOf("),(", fromIndex); 3354 if (endIndex == -1) endIndex = str.length() - 1; 3355 splitInt(str.substring(fromIndex, endIndex), array); 3356 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3357 result.add(new Area(rect, array[4])); 3358 fromIndex = endIndex + 3; 3359 } while (endIndex != str.length() - 1); 3360 3361 if (result.size() == 0) return null; 3362 3363 if (result.size() == 1) { 3364 Area area = result.get(0); 3365 Rect rect = area.rect; 3366 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3367 && rect.bottom == 0 && area.weight == 0) { 3368 return null; 3369 } 3370 } 3371 3372 return result; 3373 } 3374 }; 3375} 3376