Camera.java revision 9c53f1c33a433c1e9bd84a26d57e0e99f616fa24
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 * @see #startFaceDetection(int) 172 * @see Parameters#getMaxNumDetectedFaces(int) 173 * @see #CAMERA_FACE_DETECTION_SW 174 * @hide 175 */ 176 public static final int CAMERA_FACE_DETECTION_HW = 0; 177 178 /** 179 * Software face detection. It uses some CPU. Applications must use 180 * {@link #setPreviewTexture(SurfaceTexture)} for preview in this mode. 181 * 182 * @see #CAMERA_FACE_DETECTION_HW 183 * @hide 184 */ 185 public static final int CAMERA_FACE_DETECTION_SW = 1; 186 187 /** 188 * Returns the number of physical cameras available on this device. 189 */ 190 public native static int getNumberOfCameras(); 191 192 /** 193 * Returns the information about a particular camera. 194 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 195 */ 196 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 197 198 /** 199 * Information about a camera 200 */ 201 public static class CameraInfo { 202 /** 203 * The facing of the camera is opposite to that of the screen. 204 */ 205 public static final int CAMERA_FACING_BACK = 0; 206 207 /** 208 * The facing of the camera is the same as that of the screen. 209 */ 210 public static final int CAMERA_FACING_FRONT = 1; 211 212 /** 213 * The direction that the camera faces to. It should be 214 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 215 */ 216 public int facing; 217 218 /** 219 * <p>The orientation of the camera image. The value is the angle that the 220 * camera image needs to be rotated clockwise so it shows correctly on 221 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 222 * 223 * <p>For example, suppose a device has a naturally tall screen. The 224 * back-facing camera sensor is mounted in landscape. You are looking at 225 * the screen. If the top side of the camera sensor is aligned with the 226 * right edge of the screen in natural orientation, the value should be 227 * 90. If the top side of a front-facing camera sensor is aligned with 228 * the right of the screen, the value should be 270.</p> 229 * 230 * @see #setDisplayOrientation(int) 231 * @see Parameters#setRotation(int) 232 * @see Parameters#setPreviewSize(int, int) 233 * @see Parameters#setPictureSize(int, int) 234 * @see Parameters#setJpegThumbnailSize(int, int) 235 */ 236 public int orientation; 237 }; 238 239 /** 240 * Creates a new Camera object to access a particular hardware camera. 241 * 242 * <p>You must call {@link #release()} when you are done using the camera, 243 * otherwise it will remain locked and be unavailable to other applications. 244 * 245 * <p>Your application should only have one Camera object active at a time 246 * for a particular hardware camera. 247 * 248 * <p>Callbacks from other methods are delivered to the event loop of the 249 * thread which called open(). If this thread has no event loop, then 250 * callbacks are delivered to the main application event loop. If there 251 * is no main application event loop, callbacks are not delivered. 252 * 253 * <p class="caution"><b>Caution:</b> On some devices, this method may 254 * take a long time to complete. It is best to call this method from a 255 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 256 * blocking the main application UI thread. 257 * 258 * @param cameraId the hardware camera to access, between 0 and 259 * {@link #getNumberOfCameras()}-1. 260 * @return a new Camera object, connected, locked and ready for use. 261 * @throws RuntimeException if connection to the camera service fails (for 262 * example, if the camera is in use by another process or device policy 263 * manager has disabled the camera). 264 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 265 */ 266 public static Camera open(int cameraId) { 267 return new Camera(cameraId); 268 } 269 270 /** 271 * Creates a new Camera object to access the first back-facing camera on the 272 * device. If the device does not have a back-facing camera, this returns 273 * null. 274 * @see #open(int) 275 */ 276 public static Camera open() { 277 int numberOfCameras = getNumberOfCameras(); 278 CameraInfo cameraInfo = new CameraInfo(); 279 for (int i = 0; i < numberOfCameras; i++) { 280 getCameraInfo(i, cameraInfo); 281 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 282 return new Camera(i); 283 } 284 } 285 return null; 286 } 287 288 Camera(int cameraId) { 289 mShutterCallback = null; 290 mRawImageCallback = null; 291 mJpegCallback = null; 292 mPreviewCallback = null; 293 mPostviewCallback = null; 294 mZoomListener = null; 295 296 Looper looper; 297 if ((looper = Looper.myLooper()) != null) { 298 mEventHandler = new EventHandler(this, looper); 299 } else if ((looper = Looper.getMainLooper()) != null) { 300 mEventHandler = new EventHandler(this, looper); 301 } else { 302 mEventHandler = null; 303 } 304 305 native_setup(new WeakReference<Camera>(this), cameraId); 306 } 307 308 protected void finalize() { 309 native_release(); 310 } 311 312 private native final void native_setup(Object camera_this, int cameraId); 313 private native final void native_release(); 314 315 316 /** 317 * Disconnects and releases the Camera object resources. 318 * 319 * <p>You must call this as soon as you're done with the Camera object.</p> 320 */ 321 public final void release() { 322 native_release(); 323 mFaceDetectionRunning = false; 324 } 325 326 /** 327 * Unlocks the camera to allow another process to access it. 328 * Normally, the camera is locked to the process with an active Camera 329 * object until {@link #release()} is called. To allow rapid handoff 330 * between processes, you can call this method to release the camera 331 * temporarily for another process to use; once the other process is done 332 * you can call {@link #reconnect()} to reclaim the camera. 333 * 334 * <p>This must be done before calling 335 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 336 * called after recording starts. 337 * 338 * <p>If you are not recording video, you probably do not need this method. 339 * 340 * @throws RuntimeException if the camera cannot be unlocked. 341 */ 342 public native final void unlock(); 343 344 /** 345 * Re-locks the camera to prevent other processes from accessing it. 346 * Camera objects are locked by default unless {@link #unlock()} is 347 * called. Normally {@link #reconnect()} is used instead. 348 * 349 * <p>Since API level 13, camera is automatically locked for applications in 350 * {@link android.media.MediaRecorder#start()}. Applications can use the 351 * camera (ex: zoom) after recording starts. There is no need to call this 352 * after recording starts or stops. 353 * 354 * <p>If you are not recording video, you probably do not need this method. 355 * 356 * @throws RuntimeException if the camera cannot be re-locked (for 357 * example, if the camera is still in use by another process). 358 */ 359 public native final void lock(); 360 361 /** 362 * Reconnects to the camera service after another process used it. 363 * After {@link #unlock()} is called, another process may use the 364 * camera; when the process is done, you must reconnect to the camera, 365 * which will re-acquire the lock and allow you to continue using the 366 * camera. 367 * 368 * <p>Since API level 13, camera is automatically locked for applications in 369 * {@link android.media.MediaRecorder#start()}. Applications can use the 370 * camera (ex: zoom) after recording starts. There is no need to call this 371 * after recording starts or stops. 372 * 373 * <p>If you are not recording video, you probably do not need this method. 374 * 375 * @throws IOException if a connection cannot be re-established (for 376 * example, if the camera is still in use by another process). 377 */ 378 public native final void reconnect() throws IOException; 379 380 /** 381 * Sets the {@link Surface} to be used for live preview. 382 * Either a surface or surface texture is necessary for preview, and 383 * preview is necessary to take pictures. The same surface can be re-set 384 * without harm. Setting a preview surface will un-set any preview surface 385 * texture that was set via {@link #setPreviewTexture}. 386 * 387 * <p>The {@link SurfaceHolder} must already contain a surface when this 388 * method is called. If you are using {@link android.view.SurfaceView}, 389 * you will need to register a {@link SurfaceHolder.Callback} with 390 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 391 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 392 * calling setPreviewDisplay() or starting preview. 393 * 394 * <p>This method must be called before {@link #startPreview()}. The 395 * one exception is that if the preview surface is not set (or set to null) 396 * before startPreview() is called, then this method may be called once 397 * with a non-null parameter to set the preview surface. (This allows 398 * camera setup and surface creation to happen in parallel, saving time.) 399 * The preview surface may not otherwise change while preview is running. 400 * 401 * @param holder containing the Surface on which to place the preview, 402 * or null to remove the preview surface 403 * @throws IOException if the method fails (for example, if the surface 404 * is unavailable or unsuitable). 405 */ 406 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 407 if (holder != null) { 408 setPreviewDisplay(holder.getSurface()); 409 } else { 410 setPreviewDisplay((Surface)null); 411 } 412 } 413 414 private native final void setPreviewDisplay(Surface surface) throws IOException; 415 416 /** 417 * Sets the {@link SurfaceTexture} to be used for live preview. 418 * Either a surface or surface texture is necessary for preview, and 419 * preview is necessary to take pictures. The same surface texture can be 420 * re-set without harm. Setting a preview surface texture will un-set any 421 * preview surface that was set via {@link #setPreviewDisplay}. 422 * 423 * <p>This method must be called before {@link #startPreview()}. The 424 * one exception is that if the preview surface texture is not set (or set 425 * to null) before startPreview() is called, then this method may be called 426 * once with a non-null parameter to set the preview surface. (This allows 427 * camera setup and surface creation to happen in parallel, saving time.) 428 * The preview surface texture may not otherwise change while preview is 429 * running. 430 * 431 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 432 * SurfaceTexture set as the preview texture have an unspecified zero point, 433 * and cannot be directly compared between different cameras or different 434 * instances of the same camera, or across multiple runs of the same 435 * program. 436 * 437 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 438 * images are to be sent or null to remove the current preview surface 439 * texture 440 * @throws IOException if the method fails (for example, if the surface 441 * texture is unavailable or unsuitable). 442 */ 443 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 444 445 /** 446 * Callback interface used to deliver copies of preview frames as 447 * they are displayed. 448 * 449 * @see #setPreviewCallback(Camera.PreviewCallback) 450 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 451 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 452 * @see #startPreview() 453 */ 454 public interface PreviewCallback 455 { 456 /** 457 * Called as preview frames are displayed. This callback is invoked 458 * on the event thread {@link #open(int)} was called from. 459 * 460 * @param data the contents of the preview frame in the format defined 461 * by {@link android.graphics.ImageFormat}, which can be queried 462 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 463 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 464 * is never called, the default will be the YCbCr_420_SP 465 * (NV21) format. 466 * @param camera the Camera service object. 467 */ 468 void onPreviewFrame(byte[] data, Camera camera); 469 }; 470 471 /** 472 * Starts capturing and drawing preview frames to the screen. 473 * Preview will not actually start until a surface is supplied 474 * with {@link #setPreviewDisplay(SurfaceHolder)} or 475 * {@link #setPreviewTexture(SurfaceTexture)}. 476 * 477 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 478 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 479 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 480 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 481 * will be called when preview data becomes available. 482 */ 483 public native final void startPreview(); 484 485 /** 486 * Stops capturing and drawing preview frames to the surface, and 487 * resets the camera for a future call to {@link #startPreview()}. 488 */ 489 public final void stopPreview() { 490 _stopPreview(); 491 mFaceDetectionRunning = false; 492 } 493 494 private native final void _stopPreview(); 495 496 /** 497 * Return current preview state. 498 * 499 * FIXME: Unhide before release 500 * @hide 501 */ 502 public native final boolean previewEnabled(); 503 504 /** 505 * Installs a callback to be invoked for every preview frame in addition 506 * to displaying them on the screen. The callback will be repeatedly called 507 * for as long as preview is active. This method can be called at any time, 508 * even while preview is live. Any other preview callbacks are overridden. 509 * 510 * @param cb a callback object that receives a copy of each preview frame, 511 * or null to stop receiving callbacks. 512 */ 513 public final void setPreviewCallback(PreviewCallback cb) { 514 mPreviewCallback = cb; 515 mOneShot = false; 516 mWithBuffer = false; 517 // Always use one-shot mode. We fake camera preview mode by 518 // doing one-shot preview continuously. 519 setHasPreviewCallback(cb != null, false); 520 } 521 522 /** 523 * Installs a callback to be invoked for the next preview frame in addition 524 * to displaying it on the screen. After one invocation, the callback is 525 * cleared. This method can be called any time, even when preview is live. 526 * Any other preview callbacks are overridden. 527 * 528 * @param cb a callback object that receives a copy of the next preview frame, 529 * or null to stop receiving callbacks. 530 */ 531 public final void setOneShotPreviewCallback(PreviewCallback cb) { 532 mPreviewCallback = cb; 533 mOneShot = true; 534 mWithBuffer = false; 535 setHasPreviewCallback(cb != null, false); 536 } 537 538 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 539 540 /** 541 * Installs a callback to be invoked for every preview frame, using buffers 542 * supplied with {@link #addCallbackBuffer(byte[])}, in addition to 543 * displaying them on the screen. The callback will be repeatedly called 544 * for as long as preview is active and buffers are available. 545 * Any other preview callbacks are overridden. 546 * 547 * <p>The purpose of this method is to improve preview efficiency and frame 548 * rate by allowing preview frame memory reuse. You must call 549 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 550 * calling this method -- or no callbacks will received. 551 * 552 * The buffer queue will be cleared if this method is called with a null 553 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 554 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. 555 * 556 * @param cb a callback object that receives a copy of the preview frame, 557 * or null to stop receiving callbacks and clear the buffer queue. 558 * @see #addCallbackBuffer(byte[]) 559 */ 560 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 561 mPreviewCallback = cb; 562 mOneShot = false; 563 mWithBuffer = true; 564 setHasPreviewCallback(cb != null, true); 565 } 566 567 /** 568 * Adds a pre-allocated buffer to the preview callback buffer queue. 569 * Applications can add one or more buffers to the queue. When a preview 570 * frame arrives and there is still at least one available buffer, the 571 * buffer will be used and removed from the queue. Then preview callback is 572 * invoked with the buffer. If a frame arrives and there is no buffer left, 573 * the frame is discarded. Applications should add buffers back when they 574 * finish processing the data in them. 575 * 576 * <p>The size of the buffer is determined by multiplying the preview 577 * image width, height, and bytes per pixel. The width and height can be 578 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 579 * can be computed from 580 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 581 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 582 * 583 * <p>This method is only necessary when 584 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 585 * {@link #setPreviewCallback(PreviewCallback)} or 586 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 587 * are automatically allocated. When a supplied buffer is too small to 588 * hold the preview frame data, preview callback will return null and 589 * the buffer will be removed from the buffer queue. 590 * 591 * @param callbackBuffer the buffer to add to the queue. 592 * The size should be width * height * bits_per_pixel / 8. 593 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 594 */ 595 public final void addCallbackBuffer(byte[] callbackBuffer) 596 { 597 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 598 } 599 600 /** 601 * Adds a pre-allocated buffer to the raw image callback buffer queue. 602 * Applications can add one or more buffers to the queue. When a raw image 603 * frame arrives and there is still at least one available buffer, the 604 * buffer will be used to hold the raw image data and removed from the 605 * queue. Then raw image callback is invoked with the buffer. If a raw 606 * image frame arrives but there is no buffer left, the frame is 607 * discarded. Applications should add buffers back when they finish 608 * processing the data in them by calling this method again in order 609 * to avoid running out of raw image callback buffers. 610 * 611 * <p>The size of the buffer is determined by multiplying the raw image 612 * width, height, and bytes per pixel. The width and height can be 613 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 614 * can be computed from 615 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 616 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 617 * 618 * <p>This method is only necessary when the PictureCallbck for raw image 619 * is used while calling {@link #takePicture(Camera.ShutterCallback, 620 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 621 * 622 * <p>Please note that by calling this method, the mode for 623 * application-managed callback buffers is triggered. If this method has 624 * never been called, null will be returned by the raw image callback since 625 * there is no image callback buffer available. Furthermore, When a supplied 626 * buffer is too small to hold the raw image data, raw image callback will 627 * return null and the buffer will be removed from the buffer queue. 628 * 629 * @param callbackBuffer the buffer to add to the raw image callback buffer 630 * queue. The size should be width * height * (bits per pixel) / 8. An 631 * null callbackBuffer will be ignored and won't be added to the queue. 632 * 633 * @see #takePicture(Camera.ShutterCallback, 634 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 635 * 636 * {@hide} 637 */ 638 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 639 { 640 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 641 } 642 643 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 644 { 645 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 646 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 647 msgType != CAMERA_MSG_RAW_IMAGE) { 648 throw new IllegalArgumentException( 649 "Unsupported message type: " + msgType); 650 } 651 652 _addCallbackBuffer(callbackBuffer, msgType); 653 } 654 655 private native final void _addCallbackBuffer( 656 byte[] callbackBuffer, int msgType); 657 658 private class EventHandler extends Handler 659 { 660 private Camera mCamera; 661 662 public EventHandler(Camera c, Looper looper) { 663 super(looper); 664 mCamera = c; 665 } 666 667 @Override 668 public void handleMessage(Message msg) { 669 switch(msg.what) { 670 case CAMERA_MSG_SHUTTER: 671 if (mShutterCallback != null) { 672 mShutterCallback.onShutter(); 673 } 674 return; 675 676 case CAMERA_MSG_RAW_IMAGE: 677 if (mRawImageCallback != null) { 678 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 679 } 680 return; 681 682 case CAMERA_MSG_COMPRESSED_IMAGE: 683 if (mJpegCallback != null) { 684 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 685 } 686 return; 687 688 case CAMERA_MSG_PREVIEW_FRAME: 689 if (mPreviewCallback != null) { 690 PreviewCallback cb = mPreviewCallback; 691 if (mOneShot) { 692 // Clear the callback variable before the callback 693 // in case the app calls setPreviewCallback from 694 // the callback function 695 mPreviewCallback = null; 696 } else if (!mWithBuffer) { 697 // We're faking the camera preview mode to prevent 698 // the app from being flooded with preview frames. 699 // Set to oneshot mode again. 700 setHasPreviewCallback(true, false); 701 } 702 cb.onPreviewFrame((byte[])msg.obj, mCamera); 703 } 704 return; 705 706 case CAMERA_MSG_POSTVIEW_FRAME: 707 if (mPostviewCallback != null) { 708 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 709 } 710 return; 711 712 case CAMERA_MSG_FOCUS: 713 if (mAutoFocusCallback != null) { 714 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 715 } 716 return; 717 718 case CAMERA_MSG_ZOOM: 719 if (mZoomListener != null) { 720 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 721 } 722 return; 723 724 case CAMERA_MSG_PREVIEW_METADATA: 725 if (mFaceListener != null) { 726 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 727 } 728 return; 729 730 case CAMERA_MSG_ERROR : 731 Log.e(TAG, "Error " + msg.arg1); 732 if (mErrorCallback != null) { 733 mErrorCallback.onError(msg.arg1, mCamera); 734 } 735 return; 736 737 default: 738 Log.e(TAG, "Unknown message type " + msg.what); 739 return; 740 } 741 } 742 } 743 744 private static void postEventFromNative(Object camera_ref, 745 int what, int arg1, int arg2, Object obj) 746 { 747 Camera c = (Camera)((WeakReference)camera_ref).get(); 748 if (c == null) 749 return; 750 751 if (c.mEventHandler != null) { 752 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 753 c.mEventHandler.sendMessage(m); 754 } 755 } 756 757 /** 758 * Callback interface used to notify on completion of camera auto focus. 759 * 760 * <p>Devices that do not support auto-focus will receive a "fake" 761 * callback to this interface. If your application needs auto-focus and 762 * should not be installed on devices <em>without</em> auto-focus, you must 763 * declare that your app uses the 764 * {@code android.hardware.camera.autofocus} feature, in the 765 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 766 * manifest element.</p> 767 * 768 * @see #autoFocus(AutoFocusCallback) 769 */ 770 public interface AutoFocusCallback 771 { 772 /** 773 * Called when the camera auto focus completes. If the camera 774 * does not support auto-focus and autoFocus is called, 775 * onAutoFocus will be called immediately with a fake value of 776 * <code>success</code> set to <code>true</code>. 777 * 778 * The auto-focus routine may lock auto-exposure and auto-white balance 779 * after it completes. To check for the state of these locks, use the 780 * {@link android.hardware.Camera.Parameters#getAutoExposureLock()} and 781 * {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 782 * methods. If such locking is undesirable, use 783 * {@link android.hardware.Camera.Parameters#setAutoExposureLock(boolean)} 784 * and 785 * {@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean)} 786 * to release the locks. 787 * 788 * @param success true if focus was successful, false if otherwise 789 * @param camera the Camera service object 790 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 791 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 792 */ 793 void onAutoFocus(boolean success, Camera camera); 794 }; 795 796 /** 797 * Starts camera auto-focus and registers a callback function to run when 798 * the camera is focused. This method is only valid when preview is active 799 * (between {@link #startPreview()} and before {@link #stopPreview()}). 800 * 801 * <p>Callers should check 802 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 803 * this method should be called. If the camera does not support auto-focus, 804 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 805 * callback will be called immediately. 806 * 807 * <p>If your application should not be installed 808 * on devices without auto-focus, you must declare that your application 809 * uses auto-focus with the 810 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 811 * manifest element.</p> 812 * 813 * <p>If the current flash mode is not 814 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 815 * fired during auto-focus, depending on the driver and camera hardware.<p> 816 * 817 * The auto-focus routine may lock auto-exposure and auto-white balance 818 * after it completes. To check for the state of these locks, use the 819 * {@link android.hardware.Camera.Parameters#getAutoExposureLock()} and 820 * {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 821 * methods after the {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 822 * callback is invoked. If such locking is undesirable, use 823 * {@link android.hardware.Camera.Parameters#setAutoExposureLock(boolean)} 824 * and 825 * {@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean)} 826 * to release the locks. 827 * 828 * @param cb the callback to run 829 * @see #cancelAutoFocus() 830 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 831 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 832 */ 833 public final void autoFocus(AutoFocusCallback cb) 834 { 835 mAutoFocusCallback = cb; 836 native_autoFocus(); 837 } 838 private native final void native_autoFocus(); 839 840 /** 841 * Cancels any auto-focus function in progress. 842 * Whether or not auto-focus is currently in progress, 843 * this function will return the focus position to the default. 844 * If the camera does not support auto-focus, this is a no-op. 845 * 846 * Canceling auto-focus will return the auto-exposure lock and auto-white 847 * balance lock to their state before {@link #autoFocus(AutoFocusCallback)} 848 * was called. 849 * 850 * @see #autoFocus(Camera.AutoFocusCallback) 851 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 852 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 853 */ 854 public final void cancelAutoFocus() 855 { 856 mAutoFocusCallback = null; 857 native_cancelAutoFocus(); 858 } 859 private native final void native_cancelAutoFocus(); 860 861 /** 862 * Callback interface used to signal the moment of actual image capture. 863 * 864 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 865 */ 866 public interface ShutterCallback 867 { 868 /** 869 * Called as near as possible to the moment when a photo is captured 870 * from the sensor. This is a good opportunity to play a shutter sound 871 * or give other feedback of camera operation. This may be some time 872 * after the photo was triggered, but some time before the actual data 873 * is available. 874 */ 875 void onShutter(); 876 } 877 878 /** 879 * Callback interface used to supply image data from a photo capture. 880 * 881 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 882 */ 883 public interface PictureCallback { 884 /** 885 * Called when image data is available after a picture is taken. 886 * The format of the data depends on the context of the callback 887 * and {@link Camera.Parameters} settings. 888 * 889 * @param data a byte array of the picture data 890 * @param camera the Camera service object 891 */ 892 void onPictureTaken(byte[] data, Camera camera); 893 }; 894 895 /** 896 * Equivalent to takePicture(shutter, raw, null, jpeg). 897 * 898 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 899 */ 900 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 901 PictureCallback jpeg) { 902 takePicture(shutter, raw, null, jpeg); 903 } 904 private native final void native_takePicture(int msgType); 905 906 /** 907 * Triggers an asynchronous image capture. The camera service will initiate 908 * a series of callbacks to the application as the image capture progresses. 909 * The shutter callback occurs after the image is captured. This can be used 910 * to trigger a sound to let the user know that image has been captured. The 911 * raw callback occurs when the raw image data is available (NOTE: the data 912 * will be null if there is no raw image callback buffer available or the 913 * raw image callback buffer is not large enough to hold the raw image). 914 * The postview callback occurs when a scaled, fully processed postview 915 * image is available (NOTE: not all hardware supports this). The jpeg 916 * callback occurs when the compressed image is available. If the 917 * application does not need a particular callback, a null can be passed 918 * instead of a callback method. 919 * 920 * <p>This method is only valid when preview is active (after 921 * {@link #startPreview()}). Preview will be stopped after the image is 922 * taken; callers must call {@link #startPreview()} again if they want to 923 * re-start preview or take more pictures. This should not be called between 924 * {@link android.media.MediaRecorder#start()} and 925 * {@link android.media.MediaRecorder#stop()}. 926 * 927 * <p>After calling this method, you must not call {@link #startPreview()} 928 * or take another picture until the JPEG callback has returned. 929 * 930 * @param shutter the callback for image capture moment, or null 931 * @param raw the callback for raw (uncompressed) image data, or null 932 * @param postview callback with postview image data, may be null 933 * @param jpeg the callback for JPEG image data, or null 934 */ 935 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 936 PictureCallback postview, PictureCallback jpeg) { 937 mShutterCallback = shutter; 938 mRawImageCallback = raw; 939 mPostviewCallback = postview; 940 mJpegCallback = jpeg; 941 942 // If callback is not set, do not send me callbacks. 943 int msgType = 0; 944 if (mShutterCallback != null) { 945 msgType |= CAMERA_MSG_SHUTTER; 946 } 947 if (mRawImageCallback != null) { 948 msgType |= CAMERA_MSG_RAW_IMAGE; 949 } 950 if (mPostviewCallback != null) { 951 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 952 } 953 if (mJpegCallback != null) { 954 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 955 } 956 957 native_takePicture(msgType); 958 } 959 960 /** 961 * Zooms to the requested value smoothly. The driver will notify {@link 962 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 963 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 964 * is called with value 3. The 965 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 966 * method will be called three times with zoom values 1, 2, and 3. 967 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 968 * Applications should not call startSmoothZoom again or change the zoom 969 * value before zoom stops. If the supplied zoom value equals to the current 970 * zoom value, no zoom callback will be generated. This method is supported 971 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 972 * returns true. 973 * 974 * @param value zoom value. The valid range is 0 to {@link 975 * android.hardware.Camera.Parameters#getMaxZoom}. 976 * @throws IllegalArgumentException if the zoom value is invalid. 977 * @throws RuntimeException if the method fails. 978 * @see #setZoomChangeListener(OnZoomChangeListener) 979 */ 980 public native final void startSmoothZoom(int value); 981 982 /** 983 * Stops the smooth zoom. Applications should wait for the {@link 984 * OnZoomChangeListener} to know when the zoom is actually stopped. This 985 * method is supported if {@link 986 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 987 * 988 * @throws RuntimeException if the method fails. 989 */ 990 public native final void stopSmoothZoom(); 991 992 /** 993 * Set the clockwise rotation of preview display in degrees. This affects 994 * the preview frames and the picture displayed after snapshot. This method 995 * is useful for portrait mode applications. Note that preview display of 996 * front-facing cameras is flipped horizontally before the rotation, that 997 * is, the image is reflected along the central vertical axis of the camera 998 * sensor. So the users can see themselves as looking into a mirror. 999 * 1000 * <p>This does not affect the order of byte array passed in {@link 1001 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1002 * method is not allowed to be called during preview. 1003 * 1004 * <p>If you want to make the camera image show in the same orientation as 1005 * the display, you can use the following code. 1006 * <pre> 1007 * public static void setCameraDisplayOrientation(Activity activity, 1008 * int cameraId, android.hardware.Camera camera) { 1009 * android.hardware.Camera.CameraInfo info = 1010 * new android.hardware.Camera.CameraInfo(); 1011 * android.hardware.Camera.getCameraInfo(cameraId, info); 1012 * int rotation = activity.getWindowManager().getDefaultDisplay() 1013 * .getRotation(); 1014 * int degrees = 0; 1015 * switch (rotation) { 1016 * case Surface.ROTATION_0: degrees = 0; break; 1017 * case Surface.ROTATION_90: degrees = 90; break; 1018 * case Surface.ROTATION_180: degrees = 180; break; 1019 * case Surface.ROTATION_270: degrees = 270; break; 1020 * } 1021 * 1022 * int result; 1023 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1024 * result = (info.orientation + degrees) % 360; 1025 * result = (360 - result) % 360; // compensate the mirror 1026 * } else { // back-facing 1027 * result = (info.orientation - degrees + 360) % 360; 1028 * } 1029 * camera.setDisplayOrientation(result); 1030 * } 1031 * </pre> 1032 * @param degrees the angle that the picture will be rotated clockwise. 1033 * Valid values are 0, 90, 180, and 270. The starting 1034 * position is 0 (landscape). 1035 * @see #setPreviewDisplay(SurfaceHolder) 1036 */ 1037 public native final void setDisplayOrientation(int degrees); 1038 1039 /** 1040 * Callback interface for zoom changes during a smooth zoom operation. 1041 * 1042 * @see #setZoomChangeListener(OnZoomChangeListener) 1043 * @see #startSmoothZoom(int) 1044 */ 1045 public interface OnZoomChangeListener 1046 { 1047 /** 1048 * Called when the zoom value has changed during a smooth zoom. 1049 * 1050 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1051 * calls this for every new zoom value. 1052 * @param stopped whether smooth zoom is stopped. If the value is true, 1053 * this is the last zoom update for the application. 1054 * @param camera the Camera service object 1055 */ 1056 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1057 }; 1058 1059 /** 1060 * Registers a listener to be notified when the zoom value is updated by the 1061 * camera driver during smooth zoom. 1062 * 1063 * @param listener the listener to notify 1064 * @see #startSmoothZoom(int) 1065 */ 1066 public final void setZoomChangeListener(OnZoomChangeListener listener) 1067 { 1068 mZoomListener = listener; 1069 } 1070 1071 /** 1072 * Callback interface for face detected in the preview frame. 1073 * 1074 * @hide 1075 */ 1076 public interface FaceDetectionListener 1077 { 1078 /** 1079 * Notify the listener of the detected faces in the preview frame. 1080 * 1081 * @param faces the detected faces. The list is sorted by the score. 1082 * The highest score is the first element. 1083 * @param camera the Camera service object 1084 */ 1085 void onFaceDetection(Face[] faces, Camera camera); 1086 } 1087 1088 /** 1089 * Registers a listener to be notified about the face detected of the 1090 * preview frame. 1091 * 1092 * @param listener the listener to notify 1093 * @see #startFaceDetection(int) 1094 * @hide 1095 */ 1096 public final void setFaceDetectionListener(FaceDetectionListener listener) 1097 { 1098 mFaceListener = listener; 1099 } 1100 1101 /** 1102 * Start the face detection. This should be called after preview is started. 1103 * The camera will notify {@link FaceDetectionListener} of the detected 1104 * faces in the preview frame. The detected faces may be the same as the 1105 * previous ones. Applications should call {@link #stopFaceDetection} to 1106 * stop the face detection. This method is supported if {@link 1107 * Parameters#getMaxNumDetectedFaces(int)} returns a number larger than 0. 1108 * Hardware and software face detection cannot be used at the same time. 1109 * If the face detection has started, apps should not call this again. 1110 * 1111 * In hardware face detection mode, {@link Parameters#setWhiteBalance(String)}, 1112 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1113 * have no effect. 1114 * 1115 * @param type face detection type. This can be either {@link 1116 * #CAMERA_FACE_DETECTION_HW} or {@link #CAMERA_FACE_DETECTION_SW} 1117 * @throws IllegalArgumentException if the face detection type is 1118 * unsupported or invalid. 1119 * @throws RuntimeException if the method fails or the face detection is 1120 * already running. 1121 * @see #CAMERA_FACE_DETECTION_HW 1122 * @see #CAMERA_FACE_DETECTION_SW 1123 * @see FaceDetectionListener 1124 * @see #stopFaceDetection() 1125 * @see Parameters#getMaxNumDetectedFaces(int) 1126 * @hide 1127 */ 1128 public final void startFaceDetection(int type) { 1129 if (type != CAMERA_FACE_DETECTION_HW && type != CAMERA_FACE_DETECTION_SW) { 1130 throw new IllegalArgumentException("Invalid face detection type " + type); 1131 } 1132 if (mFaceDetectionRunning) { 1133 throw new RuntimeException("Face detection is already running"); 1134 } 1135 _startFaceDetection(type); 1136 mFaceDetectionRunning = true; 1137 } 1138 1139 /** 1140 * Stop the face detection. 1141 * 1142 * @see #startFaceDetection(int) 1143 * @hide 1144 */ 1145 public final void stopFaceDetection() { 1146 _stopFaceDetection(); 1147 mFaceDetectionRunning = false; 1148 } 1149 1150 private native final void _startFaceDetection(int type); 1151 private native final void _stopFaceDetection(); 1152 1153 /** 1154 * The information of a face from camera face detection. 1155 * 1156 * @hide 1157 */ 1158 public static class Face { 1159 public Face() { 1160 } 1161 1162 /** 1163 * Bounds of the face. (-1000, -1000) represents the top-left of the 1164 * camera field of view, and (1000, 1000) represents the bottom-right of 1165 * the field of view. The width and height cannot be 0 or negative. This 1166 * is supported by both hardware and software face detection. 1167 * 1168 * <p>The direction is relative to the sensor orientation, that is, what 1169 * the sensor sees. The direction is not affected by the rotation or 1170 * mirroring of {@link #setDisplayOrientation(int)}.</p> 1171 * 1172 * @see #startFaceDetection(int) 1173 */ 1174 public Rect rect; 1175 1176 /** 1177 * The confidence level of the face. The range is 1 to 100. 100 is the 1178 * highest confidence. This is supported by both hardware and software 1179 * face detction. 1180 * 1181 * @see #startFaceDetection(int) 1182 */ 1183 public int score; 1184 1185 /** 1186 * An unique id per face while the face is visible to the tracker. If 1187 * the face leaves the field-of-view and comes back, it will get a new 1188 * id. If the value is 0, id is not supported. 1189 */ 1190 public int id; 1191 1192 /** 1193 * The coordinates of the center of the left eye. The range is -1000 to 1194 * 1000. null if this is not supported. 1195 */ 1196 public Point leftEye; 1197 1198 /** 1199 * The coordinates of the center of the right eye. The range is -1000 to 1200 * 1000. null if this is not supported. 1201 */ 1202 public Point rightEye; 1203 1204 /** 1205 * The coordinates of the center of the mouth. The range is -1000 to 1206 * 1000. null if this is not supported. 1207 */ 1208 public Point mouth; 1209 } 1210 1211 // Error codes match the enum in include/ui/Camera.h 1212 1213 /** 1214 * Unspecified camera error. 1215 * @see Camera.ErrorCallback 1216 */ 1217 public static final int CAMERA_ERROR_UNKNOWN = 1; 1218 1219 /** 1220 * Media server died. In this case, the application must release the 1221 * Camera object and instantiate a new one. 1222 * @see Camera.ErrorCallback 1223 */ 1224 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1225 1226 /** 1227 * Callback interface for camera error notification. 1228 * 1229 * @see #setErrorCallback(ErrorCallback) 1230 */ 1231 public interface ErrorCallback 1232 { 1233 /** 1234 * Callback for camera errors. 1235 * @param error error code: 1236 * <ul> 1237 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1238 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1239 * </ul> 1240 * @param camera the Camera service object 1241 */ 1242 void onError(int error, Camera camera); 1243 }; 1244 1245 /** 1246 * Registers a callback to be invoked when an error occurs. 1247 * @param cb The callback to run 1248 */ 1249 public final void setErrorCallback(ErrorCallback cb) 1250 { 1251 mErrorCallback = cb; 1252 } 1253 1254 private native final void native_setParameters(String params); 1255 private native final String native_getParameters(); 1256 1257 /** 1258 * Changes the settings for this Camera service. 1259 * 1260 * @param params the Parameters to use for this Camera service 1261 * @throws RuntimeException if any parameter is invalid or not supported. 1262 * @see #getParameters() 1263 */ 1264 public void setParameters(Parameters params) { 1265 native_setParameters(params.flatten()); 1266 } 1267 1268 /** 1269 * Returns the current settings for this Camera service. 1270 * If modifications are made to the returned Parameters, they must be passed 1271 * to {@link #setParameters(Camera.Parameters)} to take effect. 1272 * 1273 * @see #setParameters(Camera.Parameters) 1274 */ 1275 public Parameters getParameters() { 1276 Parameters p = new Parameters(); 1277 String s = native_getParameters(); 1278 p.unflatten(s); 1279 return p; 1280 } 1281 1282 /** 1283 * Image size (width and height dimensions). 1284 */ 1285 public class Size { 1286 /** 1287 * Sets the dimensions for pictures. 1288 * 1289 * @param w the photo width (pixels) 1290 * @param h the photo height (pixels) 1291 */ 1292 public Size(int w, int h) { 1293 width = w; 1294 height = h; 1295 } 1296 /** 1297 * Compares {@code obj} to this size. 1298 * 1299 * @param obj the object to compare this size with. 1300 * @return {@code true} if the width and height of {@code obj} is the 1301 * same as those of this size. {@code false} otherwise. 1302 */ 1303 @Override 1304 public boolean equals(Object obj) { 1305 if (!(obj instanceof Size)) { 1306 return false; 1307 } 1308 Size s = (Size) obj; 1309 return width == s.width && height == s.height; 1310 } 1311 @Override 1312 public int hashCode() { 1313 return width * 32713 + height; 1314 } 1315 /** width of the picture */ 1316 public int width; 1317 /** height of the picture */ 1318 public int height; 1319 }; 1320 1321 /** 1322 * <p>The Area class is used for choosing specific metering and focus areas for 1323 * the camera to use when calculating auto-exposure, auto-white balance, and 1324 * auto-focus.</p> 1325 * 1326 * <p>To find out how many simultaneous areas a given camera supports, use 1327 * {@link Parameters#getMaxNumMeteringAreas()} and 1328 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1329 * selection is unsupported, these methods will return 0.</p> 1330 * 1331 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1332 * that determines its importance. The bounds are relative to the camera's 1333 * current field of view. The coordinates are mapped so that (-1000, -1000) 1334 * is always the top-left corner of the current field of view, and (1000, 1335 * 1000) is always the bottom-right corner of the current field of 1336 * view. Setting Areas with bounds outside that range is not allowed. Areas 1337 * with zero or negative width or height are not allowed.</p> 1338 * 1339 * <p>The weight must range from 1 to 1000, and represents a weight for 1340 * every pixel in the area. This means that a large metering area with 1341 * the same weight as a smaller area will have more effect in the 1342 * metering result. Metering areas can overlap and the driver 1343 * will add the weights in the overlap region.</p> 1344 * 1345 * @see Parameters#setFocusAreas(List) 1346 * @see Parameters#getFocusAreas() 1347 * @see Parameters#getMaxNumFocusAreas() 1348 * @see Parameters#setMeteringAreas(List) 1349 * @see Parameters#getMeteringAreas() 1350 * @see Parameters#getMaxNumMeteringAreas() 1351 */ 1352 public static class Area { 1353 /** 1354 * Create an area with specified rectangle and weight. 1355 * 1356 * @param rect the bounds of the area. 1357 * @param weight the weight of the area. 1358 */ 1359 public Area(Rect rect, int weight) { 1360 this.rect = rect; 1361 this.weight = weight; 1362 } 1363 /** 1364 * Compares {@code obj} to this area. 1365 * 1366 * @param obj the object to compare this area with. 1367 * @return {@code true} if the rectangle and weight of {@code obj} is 1368 * the same as those of this area. {@code false} otherwise. 1369 */ 1370 @Override 1371 public boolean equals(Object obj) { 1372 if (!(obj instanceof Area)) { 1373 return false; 1374 } 1375 Area a = (Area) obj; 1376 if (rect == null) { 1377 if (a.rect != null) return false; 1378 } else { 1379 if (!rect.equals(a.rect)) return false; 1380 } 1381 return weight == a.weight; 1382 } 1383 1384 /** 1385 * Bounds of the area. (-1000, -1000) represents the top-left of the 1386 * camera field of view, and (1000, 1000) represents the bottom-right of 1387 * the field of view. Setting bounds outside that range is not 1388 * allowed. Bounds with zero or negative width or height are not 1389 * allowed. 1390 * 1391 * @see Parameters#getFocusAreas() 1392 * @see Parameters#getMeteringAreas() 1393 */ 1394 public Rect rect; 1395 1396 /** 1397 * Weight of the area. The weight must range from 1 to 1000, and 1398 * represents a weight for every pixel in the area. This means that a 1399 * large metering area with the same weight as a smaller area will have 1400 * more effect in the metering result. Metering areas can overlap and 1401 * the driver will add the weights in the overlap region. 1402 * 1403 * @see Parameters#getFocusAreas() 1404 * @see Parameters#getMeteringAreas() 1405 */ 1406 public int weight; 1407 } 1408 1409 /** 1410 * Camera service settings. 1411 * 1412 * <p>To make camera parameters take effect, applications have to call 1413 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1414 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1415 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1416 * is called with the changed parameters object. 1417 * 1418 * <p>Different devices may have different camera capabilities, such as 1419 * picture size or flash modes. The application should query the camera 1420 * capabilities before setting parameters. For example, the application 1421 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1422 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1423 * camera does not support color effects, 1424 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1425 */ 1426 public class Parameters { 1427 // Parameter keys to communicate with the camera driver. 1428 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1429 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1430 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1431 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1432 private static final String KEY_PICTURE_SIZE = "picture-size"; 1433 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1434 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1435 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1436 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1437 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1438 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1439 private static final String KEY_ROTATION = "rotation"; 1440 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1441 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1442 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1443 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1444 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1445 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1446 private static final String KEY_EFFECT = "effect"; 1447 private static final String KEY_ANTIBANDING = "antibanding"; 1448 private static final String KEY_SCENE_MODE = "scene-mode"; 1449 private static final String KEY_FLASH_MODE = "flash-mode"; 1450 private static final String KEY_FOCUS_MODE = "focus-mode"; 1451 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1452 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1453 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1454 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1455 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1456 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1457 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1458 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1459 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1460 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1461 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1462 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1463 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1464 private static final String KEY_METERING_AREAS = "metering-areas"; 1465 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1466 private static final String KEY_ZOOM = "zoom"; 1467 private static final String KEY_MAX_ZOOM = "max-zoom"; 1468 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1469 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1470 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1471 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1472 private static final String KEY_VIDEO_SIZE = "video-size"; 1473 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1474 "preferred-preview-size-for-video"; 1475 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 1476 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 1477 private static final String KEY_RECORDING_HINT = "recording-hint"; 1478 1479 // Parameter key suffix for supported values. 1480 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1481 1482 private static final String TRUE = "true"; 1483 private static final String FALSE = "false"; 1484 1485 // Values for white balance settings. 1486 public static final String WHITE_BALANCE_AUTO = "auto"; 1487 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1488 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1489 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1490 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1491 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1492 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1493 public static final String WHITE_BALANCE_SHADE = "shade"; 1494 1495 // Values for color effect settings. 1496 public static final String EFFECT_NONE = "none"; 1497 public static final String EFFECT_MONO = "mono"; 1498 public static final String EFFECT_NEGATIVE = "negative"; 1499 public static final String EFFECT_SOLARIZE = "solarize"; 1500 public static final String EFFECT_SEPIA = "sepia"; 1501 public static final String EFFECT_POSTERIZE = "posterize"; 1502 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1503 public static final String EFFECT_BLACKBOARD = "blackboard"; 1504 public static final String EFFECT_AQUA = "aqua"; 1505 1506 // Values for antibanding settings. 1507 public static final String ANTIBANDING_AUTO = "auto"; 1508 public static final String ANTIBANDING_50HZ = "50hz"; 1509 public static final String ANTIBANDING_60HZ = "60hz"; 1510 public static final String ANTIBANDING_OFF = "off"; 1511 1512 // Values for flash mode settings. 1513 /** 1514 * Flash will not be fired. 1515 */ 1516 public static final String FLASH_MODE_OFF = "off"; 1517 1518 /** 1519 * Flash will be fired automatically when required. The flash may be fired 1520 * during preview, auto-focus, or snapshot depending on the driver. 1521 */ 1522 public static final String FLASH_MODE_AUTO = "auto"; 1523 1524 /** 1525 * Flash will always be fired during snapshot. The flash may also be 1526 * fired during preview or auto-focus depending on the driver. 1527 */ 1528 public static final String FLASH_MODE_ON = "on"; 1529 1530 /** 1531 * Flash will be fired in red-eye reduction mode. 1532 */ 1533 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1534 1535 /** 1536 * Constant emission of light during preview, auto-focus and snapshot. 1537 * This can also be used for video recording. 1538 */ 1539 public static final String FLASH_MODE_TORCH = "torch"; 1540 1541 /** 1542 * Scene mode is off. 1543 */ 1544 public static final String SCENE_MODE_AUTO = "auto"; 1545 1546 /** 1547 * Take photos of fast moving objects. Same as {@link 1548 * #SCENE_MODE_SPORTS}. 1549 */ 1550 public static final String SCENE_MODE_ACTION = "action"; 1551 1552 /** 1553 * Take people pictures. 1554 */ 1555 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1556 1557 /** 1558 * Take pictures on distant objects. 1559 */ 1560 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1561 1562 /** 1563 * Take photos at night. 1564 */ 1565 public static final String SCENE_MODE_NIGHT = "night"; 1566 1567 /** 1568 * Take people pictures at night. 1569 */ 1570 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1571 1572 /** 1573 * Take photos in a theater. Flash light is off. 1574 */ 1575 public static final String SCENE_MODE_THEATRE = "theatre"; 1576 1577 /** 1578 * Take pictures on the beach. 1579 */ 1580 public static final String SCENE_MODE_BEACH = "beach"; 1581 1582 /** 1583 * Take pictures on the snow. 1584 */ 1585 public static final String SCENE_MODE_SNOW = "snow"; 1586 1587 /** 1588 * Take sunset photos. 1589 */ 1590 public static final String SCENE_MODE_SUNSET = "sunset"; 1591 1592 /** 1593 * Avoid blurry pictures (for example, due to hand shake). 1594 */ 1595 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1596 1597 /** 1598 * For shooting firework displays. 1599 */ 1600 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1601 1602 /** 1603 * Take photos of fast moving objects. Same as {@link 1604 * #SCENE_MODE_ACTION}. 1605 */ 1606 public static final String SCENE_MODE_SPORTS = "sports"; 1607 1608 /** 1609 * Take indoor low-light shot. 1610 */ 1611 public static final String SCENE_MODE_PARTY = "party"; 1612 1613 /** 1614 * Capture the naturally warm color of scenes lit by candles. 1615 */ 1616 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1617 1618 /** 1619 * Applications are looking for a barcode. Camera driver will be 1620 * optimized for barcode reading. 1621 */ 1622 public static final String SCENE_MODE_BARCODE = "barcode"; 1623 1624 /** 1625 * Auto-focus mode. Applications should call {@link 1626 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1627 */ 1628 public static final String FOCUS_MODE_AUTO = "auto"; 1629 1630 /** 1631 * Focus is set at infinity. Applications should not call 1632 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1633 */ 1634 public static final String FOCUS_MODE_INFINITY = "infinity"; 1635 1636 /** 1637 * Macro (close-up) focus mode. Applications should call 1638 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1639 * mode. 1640 */ 1641 public static final String FOCUS_MODE_MACRO = "macro"; 1642 1643 /** 1644 * Focus is fixed. The camera is always in this mode if the focus is not 1645 * adjustable. If the camera has auto-focus, this mode can fix the 1646 * focus, which is usually at hyperfocal distance. Applications should 1647 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1648 */ 1649 public static final String FOCUS_MODE_FIXED = "fixed"; 1650 1651 /** 1652 * Extended depth of field (EDOF). Focusing is done digitally and 1653 * continuously. Applications should not call {@link 1654 * #autoFocus(AutoFocusCallback)} in this mode. 1655 */ 1656 public static final String FOCUS_MODE_EDOF = "edof"; 1657 1658 /** 1659 * Continuous auto focus mode intended for video recording. The camera 1660 * continuously tries to focus. This is ideal for shooting video. 1661 * Applications still can call {@link 1662 * #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1663 * Camera.PictureCallback)} in this mode but the subject may not be in 1664 * focus. Auto focus starts when the parameter is set. Applications 1665 * should not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1666 * To stop continuous focus, applications should change the focus mode 1667 * to other modes. 1668 */ 1669 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1670 1671 // Indices for focus distance array. 1672 /** 1673 * The array index of near focus distance for use with 1674 * {@link #getFocusDistances(float[])}. 1675 */ 1676 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1677 1678 /** 1679 * The array index of optimal focus distance for use with 1680 * {@link #getFocusDistances(float[])}. 1681 */ 1682 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1683 1684 /** 1685 * The array index of far focus distance for use with 1686 * {@link #getFocusDistances(float[])}. 1687 */ 1688 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1689 1690 /** 1691 * The array index of minimum preview fps for use with {@link 1692 * #getPreviewFpsRange(int[])} or {@link 1693 * #getSupportedPreviewFpsRange()}. 1694 */ 1695 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1696 1697 /** 1698 * The array index of maximum preview fps for use with {@link 1699 * #getPreviewFpsRange(int[])} or {@link 1700 * #getSupportedPreviewFpsRange()}. 1701 */ 1702 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1703 1704 // Formats for setPreviewFormat and setPictureFormat. 1705 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1706 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1707 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1708 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1709 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1710 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1711 1712 private HashMap<String, String> mMap; 1713 1714 private Parameters() { 1715 mMap = new HashMap<String, String>(); 1716 } 1717 1718 /** 1719 * Writes the current Parameters to the log. 1720 * @hide 1721 * @deprecated 1722 */ 1723 public void dump() { 1724 Log.e(TAG, "dump: size=" + mMap.size()); 1725 for (String k : mMap.keySet()) { 1726 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1727 } 1728 } 1729 1730 /** 1731 * Creates a single string with all the parameters set in 1732 * this Parameters object. 1733 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1734 * 1735 * @return a String with all values from this Parameters object, in 1736 * semi-colon delimited key-value pairs 1737 */ 1738 public String flatten() { 1739 StringBuilder flattened = new StringBuilder(); 1740 for (String k : mMap.keySet()) { 1741 flattened.append(k); 1742 flattened.append("="); 1743 flattened.append(mMap.get(k)); 1744 flattened.append(";"); 1745 } 1746 // chop off the extra semicolon at the end 1747 flattened.deleteCharAt(flattened.length()-1); 1748 return flattened.toString(); 1749 } 1750 1751 /** 1752 * Takes a flattened string of parameters and adds each one to 1753 * this Parameters object. 1754 * <p>The {@link #flatten()} method does the reverse.</p> 1755 * 1756 * @param flattened a String of parameters (key-value paired) that 1757 * are semi-colon delimited 1758 */ 1759 public void unflatten(String flattened) { 1760 mMap.clear(); 1761 1762 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1763 while (tokenizer.hasMoreElements()) { 1764 String kv = tokenizer.nextToken(); 1765 int pos = kv.indexOf('='); 1766 if (pos == -1) { 1767 continue; 1768 } 1769 String k = kv.substring(0, pos); 1770 String v = kv.substring(pos + 1); 1771 mMap.put(k, v); 1772 } 1773 } 1774 1775 public void remove(String key) { 1776 mMap.remove(key); 1777 } 1778 1779 /** 1780 * Sets a String parameter. 1781 * 1782 * @param key the key name for the parameter 1783 * @param value the String value of the parameter 1784 */ 1785 public void set(String key, String value) { 1786 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1787 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1788 return; 1789 } 1790 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1791 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1792 return; 1793 } 1794 1795 mMap.put(key, value); 1796 } 1797 1798 /** 1799 * Sets an integer parameter. 1800 * 1801 * @param key the key name for the parameter 1802 * @param value the int value of the parameter 1803 */ 1804 public void set(String key, int value) { 1805 mMap.put(key, Integer.toString(value)); 1806 } 1807 1808 private void set(String key, List<Area> areas) { 1809 if (areas == null) { 1810 set(key, "(0,0,0,0,0)"); 1811 } else { 1812 StringBuilder buffer = new StringBuilder(); 1813 for (int i = 0; i < areas.size(); i++) { 1814 Area area = areas.get(i); 1815 Rect rect = area.rect; 1816 buffer.append('('); 1817 buffer.append(rect.left); 1818 buffer.append(','); 1819 buffer.append(rect.top); 1820 buffer.append(','); 1821 buffer.append(rect.right); 1822 buffer.append(','); 1823 buffer.append(rect.bottom); 1824 buffer.append(','); 1825 buffer.append(area.weight); 1826 buffer.append(')'); 1827 if (i != areas.size() - 1) buffer.append(','); 1828 } 1829 set(key, buffer.toString()); 1830 } 1831 } 1832 1833 /** 1834 * Returns the value of a String parameter. 1835 * 1836 * @param key the key name for the parameter 1837 * @return the String value of the parameter 1838 */ 1839 public String get(String key) { 1840 return mMap.get(key); 1841 } 1842 1843 /** 1844 * Returns the value of an integer parameter. 1845 * 1846 * @param key the key name for the parameter 1847 * @return the int value of the parameter 1848 */ 1849 public int getInt(String key) { 1850 return Integer.parseInt(mMap.get(key)); 1851 } 1852 1853 /** 1854 * Sets the dimensions for preview pictures. If the preview has already 1855 * started, applications should stop the preview first before changing 1856 * preview size. 1857 * 1858 * The sides of width and height are based on camera orientation. That 1859 * is, the preview size is the size before it is rotated by display 1860 * orientation. So applications need to consider the display orientation 1861 * while setting preview size. For example, suppose the camera supports 1862 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1863 * preview ratio. If the display orientation is set to 0 or 180, preview 1864 * size should be set to 480x320. If the display orientation is set to 1865 * 90 or 270, preview size should be set to 320x480. The display 1866 * orientation should also be considered while setting picture size and 1867 * thumbnail size. 1868 * 1869 * @param width the width of the pictures, in pixels 1870 * @param height the height of the pictures, in pixels 1871 * @see #setDisplayOrientation(int) 1872 * @see #getCameraInfo(int, CameraInfo) 1873 * @see #setPictureSize(int, int) 1874 * @see #setJpegThumbnailSize(int, int) 1875 */ 1876 public void setPreviewSize(int width, int height) { 1877 String v = Integer.toString(width) + "x" + Integer.toString(height); 1878 set(KEY_PREVIEW_SIZE, v); 1879 } 1880 1881 /** 1882 * Returns the dimensions setting for preview pictures. 1883 * 1884 * @return a Size object with the width and height setting 1885 * for the preview picture 1886 */ 1887 public Size getPreviewSize() { 1888 String pair = get(KEY_PREVIEW_SIZE); 1889 return strToSize(pair); 1890 } 1891 1892 /** 1893 * Gets the supported preview sizes. 1894 * 1895 * @return a list of Size object. This method will always return a list 1896 * with at least one element. 1897 */ 1898 public List<Size> getSupportedPreviewSizes() { 1899 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1900 return splitSize(str); 1901 } 1902 1903 /** 1904 * <p>Gets the supported video frame sizes that can be used by 1905 * MediaRecorder.</p> 1906 * 1907 * <p>If the returned list is not null, the returned list will contain at 1908 * least one Size and one of the sizes in the returned list must be 1909 * passed to MediaRecorder.setVideoSize() for camcorder application if 1910 * camera is used as the video source. In this case, the size of the 1911 * preview can be different from the resolution of the recorded video 1912 * during video recording.</p> 1913 * 1914 * @return a list of Size object if camera has separate preview and 1915 * video output; otherwise, null is returned. 1916 * @see #getPreferredPreviewSizeForVideo() 1917 */ 1918 public List<Size> getSupportedVideoSizes() { 1919 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1920 return splitSize(str); 1921 } 1922 1923 /** 1924 * Returns the preferred or recommended preview size (width and height) 1925 * in pixels for video recording. Camcorder applications should 1926 * set the preview size to a value that is not larger than the 1927 * preferred preview size. In other words, the product of the width 1928 * and height of the preview size should not be larger than that of 1929 * the preferred preview size. In addition, we recommend to choose a 1930 * preview size that has the same aspect ratio as the resolution of 1931 * video to be recorded. 1932 * 1933 * @return the preferred preview size (width and height) in pixels for 1934 * video recording if getSupportedVideoSizes() does not return 1935 * null; otherwise, null is returned. 1936 * @see #getSupportedVideoSizes() 1937 */ 1938 public Size getPreferredPreviewSizeForVideo() { 1939 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1940 return strToSize(pair); 1941 } 1942 1943 /** 1944 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1945 * applications set both width and height to 0, EXIF will not contain 1946 * thumbnail.</p> 1947 * 1948 * <p>Applications need to consider the display orientation. See {@link 1949 * #setPreviewSize(int,int)} for reference.</p> 1950 * 1951 * @param width the width of the thumbnail, in pixels 1952 * @param height the height of the thumbnail, in pixels 1953 * @see #setPreviewSize(int,int) 1954 */ 1955 public void setJpegThumbnailSize(int width, int height) { 1956 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1957 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1958 } 1959 1960 /** 1961 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1962 * 1963 * @return a Size object with the height and width setting for the EXIF 1964 * thumbnails 1965 */ 1966 public Size getJpegThumbnailSize() { 1967 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1968 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1969 } 1970 1971 /** 1972 * Gets the supported jpeg thumbnail sizes. 1973 * 1974 * @return a list of Size object. This method will always return a list 1975 * with at least two elements. Size 0,0 (no thumbnail) is always 1976 * supported. 1977 */ 1978 public List<Size> getSupportedJpegThumbnailSizes() { 1979 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1980 return splitSize(str); 1981 } 1982 1983 /** 1984 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1985 * 1986 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1987 * to 100, with 100 being the best. 1988 */ 1989 public void setJpegThumbnailQuality(int quality) { 1990 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1991 } 1992 1993 /** 1994 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1995 * 1996 * @return the JPEG quality setting of the EXIF thumbnail. 1997 */ 1998 public int getJpegThumbnailQuality() { 1999 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2000 } 2001 2002 /** 2003 * Sets Jpeg quality of captured picture. 2004 * 2005 * @param quality the JPEG quality of captured picture. The range is 1 2006 * to 100, with 100 being the best. 2007 */ 2008 public void setJpegQuality(int quality) { 2009 set(KEY_JPEG_QUALITY, quality); 2010 } 2011 2012 /** 2013 * Returns the quality setting for the JPEG picture. 2014 * 2015 * @return the JPEG picture quality setting. 2016 */ 2017 public int getJpegQuality() { 2018 return getInt(KEY_JPEG_QUALITY); 2019 } 2020 2021 /** 2022 * Sets the rate at which preview frames are received. This is the 2023 * target frame rate. The actual frame rate depends on the driver. 2024 * 2025 * @param fps the frame rate (frames per second) 2026 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2027 */ 2028 @Deprecated 2029 public void setPreviewFrameRate(int fps) { 2030 set(KEY_PREVIEW_FRAME_RATE, fps); 2031 } 2032 2033 /** 2034 * Returns the setting for the rate at which preview frames are 2035 * received. This is the target frame rate. The actual frame rate 2036 * depends on the driver. 2037 * 2038 * @return the frame rate setting (frames per second) 2039 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2040 */ 2041 @Deprecated 2042 public int getPreviewFrameRate() { 2043 return getInt(KEY_PREVIEW_FRAME_RATE); 2044 } 2045 2046 /** 2047 * Gets the supported preview frame rates. 2048 * 2049 * @return a list of supported preview frame rates. null if preview 2050 * frame rate setting is not supported. 2051 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2052 */ 2053 @Deprecated 2054 public List<Integer> getSupportedPreviewFrameRates() { 2055 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2056 return splitInt(str); 2057 } 2058 2059 /** 2060 * Sets the maximum and maximum preview fps. This controls the rate of 2061 * preview frames received in {@link PreviewCallback}. The minimum and 2062 * maximum preview fps must be one of the elements from {@link 2063 * #getSupportedPreviewFpsRange}. 2064 * 2065 * @param min the minimum preview fps (scaled by 1000). 2066 * @param max the maximum preview fps (scaled by 1000). 2067 * @throws RuntimeException if fps range is invalid. 2068 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2069 * @see #getSupportedPreviewFpsRange() 2070 */ 2071 public void setPreviewFpsRange(int min, int max) { 2072 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2073 } 2074 2075 /** 2076 * Returns the current minimum and maximum preview fps. The values are 2077 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2078 * 2079 * @return range the minimum and maximum preview fps (scaled by 1000). 2080 * @see #PREVIEW_FPS_MIN_INDEX 2081 * @see #PREVIEW_FPS_MAX_INDEX 2082 * @see #getSupportedPreviewFpsRange() 2083 */ 2084 public void getPreviewFpsRange(int[] range) { 2085 if (range == null || range.length != 2) { 2086 throw new IllegalArgumentException( 2087 "range must be an array with two elements."); 2088 } 2089 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2090 } 2091 2092 /** 2093 * Gets the supported preview fps (frame-per-second) ranges. Each range 2094 * contains a minimum fps and maximum fps. If minimum fps equals to 2095 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2096 * the camera outputs frames in auto frame rate. The actual frame rate 2097 * fluctuates between the minimum and the maximum. The values are 2098 * multiplied by 1000 and represented in integers. For example, if frame 2099 * rate is 26.623 frames per second, the value is 26623. 2100 * 2101 * @return a list of supported preview fps ranges. This method returns a 2102 * list with at least one element. Every element is an int array 2103 * of two values - minimum fps and maximum fps. The list is 2104 * sorted from small to large (first by maximum fps and then 2105 * minimum fps). 2106 * @see #PREVIEW_FPS_MIN_INDEX 2107 * @see #PREVIEW_FPS_MAX_INDEX 2108 */ 2109 public List<int[]> getSupportedPreviewFpsRange() { 2110 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2111 return splitRange(str); 2112 } 2113 2114 /** 2115 * Sets the image format for preview pictures. 2116 * <p>If this is never called, the default format will be 2117 * {@link android.graphics.ImageFormat#NV21}, which 2118 * uses the NV21 encoding format.</p> 2119 * 2120 * @param pixel_format the desired preview picture format, defined 2121 * by one of the {@link android.graphics.ImageFormat} constants. 2122 * (E.g., <var>ImageFormat.NV21</var> (default), 2123 * <var>ImageFormat.RGB_565</var>, or 2124 * <var>ImageFormat.JPEG</var>) 2125 * @see android.graphics.ImageFormat 2126 */ 2127 public void setPreviewFormat(int pixel_format) { 2128 String s = cameraFormatForPixelFormat(pixel_format); 2129 if (s == null) { 2130 throw new IllegalArgumentException( 2131 "Invalid pixel_format=" + pixel_format); 2132 } 2133 2134 set(KEY_PREVIEW_FORMAT, s); 2135 } 2136 2137 /** 2138 * Returns the image format for preview frames got from 2139 * {@link PreviewCallback}. 2140 * 2141 * @return the preview format. 2142 * @see android.graphics.ImageFormat 2143 */ 2144 public int getPreviewFormat() { 2145 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2146 } 2147 2148 /** 2149 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2150 * is always supported. {@link android.graphics.ImageFormat#YV12} 2151 * is always supported since API level 12. 2152 * 2153 * @return a list of supported preview formats. This method will always 2154 * return a list with at least one element. 2155 * @see android.graphics.ImageFormat 2156 */ 2157 public List<Integer> getSupportedPreviewFormats() { 2158 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2159 ArrayList<Integer> formats = new ArrayList<Integer>(); 2160 for (String s : split(str)) { 2161 int f = pixelFormatForCameraFormat(s); 2162 if (f == ImageFormat.UNKNOWN) continue; 2163 formats.add(f); 2164 } 2165 return formats; 2166 } 2167 2168 /** 2169 * <p>Sets the dimensions for pictures.</p> 2170 * 2171 * <p>Applications need to consider the display orientation. See {@link 2172 * #setPreviewSize(int,int)} for reference.</p> 2173 * 2174 * @param width the width for pictures, in pixels 2175 * @param height the height for pictures, in pixels 2176 * @see #setPreviewSize(int,int) 2177 * 2178 */ 2179 public void setPictureSize(int width, int height) { 2180 String v = Integer.toString(width) + "x" + Integer.toString(height); 2181 set(KEY_PICTURE_SIZE, v); 2182 } 2183 2184 /** 2185 * Returns the dimension setting for pictures. 2186 * 2187 * @return a Size object with the height and width setting 2188 * for pictures 2189 */ 2190 public Size getPictureSize() { 2191 String pair = get(KEY_PICTURE_SIZE); 2192 return strToSize(pair); 2193 } 2194 2195 /** 2196 * Gets the supported picture sizes. 2197 * 2198 * @return a list of supported picture sizes. This method will always 2199 * return a list with at least one element. 2200 */ 2201 public List<Size> getSupportedPictureSizes() { 2202 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2203 return splitSize(str); 2204 } 2205 2206 /** 2207 * Sets the image format for pictures. 2208 * 2209 * @param pixel_format the desired picture format 2210 * (<var>ImageFormat.NV21</var>, 2211 * <var>ImageFormat.RGB_565</var>, or 2212 * <var>ImageFormat.JPEG</var>) 2213 * @see android.graphics.ImageFormat 2214 */ 2215 public void setPictureFormat(int pixel_format) { 2216 String s = cameraFormatForPixelFormat(pixel_format); 2217 if (s == null) { 2218 throw new IllegalArgumentException( 2219 "Invalid pixel_format=" + pixel_format); 2220 } 2221 2222 set(KEY_PICTURE_FORMAT, s); 2223 } 2224 2225 /** 2226 * Returns the image format for pictures. 2227 * 2228 * @return the picture format 2229 * @see android.graphics.ImageFormat 2230 */ 2231 public int getPictureFormat() { 2232 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2233 } 2234 2235 /** 2236 * Gets the supported picture formats. 2237 * 2238 * @return supported picture formats. This method will always return a 2239 * list with at least one element. 2240 * @see android.graphics.ImageFormat 2241 */ 2242 public List<Integer> getSupportedPictureFormats() { 2243 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2244 ArrayList<Integer> formats = new ArrayList<Integer>(); 2245 for (String s : split(str)) { 2246 int f = pixelFormatForCameraFormat(s); 2247 if (f == ImageFormat.UNKNOWN) continue; 2248 formats.add(f); 2249 } 2250 return formats; 2251 } 2252 2253 private String cameraFormatForPixelFormat(int pixel_format) { 2254 switch(pixel_format) { 2255 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2256 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2257 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2258 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2259 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2260 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2261 default: return null; 2262 } 2263 } 2264 2265 private int pixelFormatForCameraFormat(String format) { 2266 if (format == null) 2267 return ImageFormat.UNKNOWN; 2268 2269 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2270 return ImageFormat.NV16; 2271 2272 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2273 return ImageFormat.NV21; 2274 2275 if (format.equals(PIXEL_FORMAT_YUV422I)) 2276 return ImageFormat.YUY2; 2277 2278 if (format.equals(PIXEL_FORMAT_YUV420P)) 2279 return ImageFormat.YV12; 2280 2281 if (format.equals(PIXEL_FORMAT_RGB565)) 2282 return ImageFormat.RGB_565; 2283 2284 if (format.equals(PIXEL_FORMAT_JPEG)) 2285 return ImageFormat.JPEG; 2286 2287 return ImageFormat.UNKNOWN; 2288 } 2289 2290 /** 2291 * Sets the rotation angle in degrees relative to the orientation of 2292 * the camera. This affects the pictures returned from JPEG {@link 2293 * PictureCallback}. The camera driver may set orientation in the 2294 * EXIF header without rotating the picture. Or the driver may rotate 2295 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 2296 * the orientation in the EXIF header will be missing or 1 (row #0 is 2297 * top and column #0 is left side). 2298 * 2299 * <p>If applications want to rotate the picture to match the orientation 2300 * of what users see, apps should use {@link 2301 * android.view.OrientationEventListener} and {@link CameraInfo}. 2302 * The value from OrientationEventListener is relative to the natural 2303 * orientation of the device. CameraInfo.orientation is the angle 2304 * between camera orientation and natural device orientation. The sum 2305 * of the two is the rotation angle for back-facing camera. The 2306 * difference of the two is the rotation angle for front-facing camera. 2307 * Note that the JPEG pictures of front-facing cameras are not mirrored 2308 * as in preview display. 2309 * 2310 * <p>For example, suppose the natural orientation of the device is 2311 * portrait. The device is rotated 270 degrees clockwise, so the device 2312 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2313 * landscape and the top side of the camera sensor is aligned with the 2314 * right edge of the display in natural orientation. So the camera 2315 * orientation is 90. The rotation should be set to 0 (270 + 90). 2316 * 2317 * <p>The reference code is as follows. 2318 * 2319 * <pre> 2320 * public void public void onOrientationChanged(int orientation) { 2321 * if (orientation == ORIENTATION_UNKNOWN) return; 2322 * android.hardware.Camera.CameraInfo info = 2323 * new android.hardware.Camera.CameraInfo(); 2324 * android.hardware.Camera.getCameraInfo(cameraId, info); 2325 * orientation = (orientation + 45) / 90 * 90; 2326 * int rotation = 0; 2327 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2328 * rotation = (info.orientation - orientation + 360) % 360; 2329 * } else { // back-facing camera 2330 * rotation = (info.orientation + orientation) % 360; 2331 * } 2332 * mParameters.setRotation(rotation); 2333 * } 2334 * </pre> 2335 * 2336 * @param rotation The rotation angle in degrees relative to the 2337 * orientation of the camera. Rotation can only be 0, 2338 * 90, 180 or 270. 2339 * @throws IllegalArgumentException if rotation value is invalid. 2340 * @see android.view.OrientationEventListener 2341 * @see #getCameraInfo(int, CameraInfo) 2342 */ 2343 public void setRotation(int rotation) { 2344 if (rotation == 0 || rotation == 90 || rotation == 180 2345 || rotation == 270) { 2346 set(KEY_ROTATION, Integer.toString(rotation)); 2347 } else { 2348 throw new IllegalArgumentException( 2349 "Invalid rotation=" + rotation); 2350 } 2351 } 2352 2353 /** 2354 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2355 * header. 2356 * 2357 * @param latitude GPS latitude coordinate. 2358 */ 2359 public void setGpsLatitude(double latitude) { 2360 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2361 } 2362 2363 /** 2364 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2365 * header. 2366 * 2367 * @param longitude GPS longitude coordinate. 2368 */ 2369 public void setGpsLongitude(double longitude) { 2370 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2371 } 2372 2373 /** 2374 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2375 * 2376 * @param altitude GPS altitude in meters. 2377 */ 2378 public void setGpsAltitude(double altitude) { 2379 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2380 } 2381 2382 /** 2383 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2384 * 2385 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2386 * 1970). 2387 */ 2388 public void setGpsTimestamp(long timestamp) { 2389 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2390 } 2391 2392 /** 2393 * Sets GPS processing method. It will store up to 32 characters 2394 * in JPEG EXIF header. 2395 * 2396 * @param processing_method The processing method to get this location. 2397 */ 2398 public void setGpsProcessingMethod(String processing_method) { 2399 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2400 } 2401 2402 /** 2403 * Removes GPS latitude, longitude, altitude, and timestamp from the 2404 * parameters. 2405 */ 2406 public void removeGpsData() { 2407 remove(KEY_GPS_LATITUDE); 2408 remove(KEY_GPS_LONGITUDE); 2409 remove(KEY_GPS_ALTITUDE); 2410 remove(KEY_GPS_TIMESTAMP); 2411 remove(KEY_GPS_PROCESSING_METHOD); 2412 } 2413 2414 /** 2415 * Gets the current white balance setting. 2416 * 2417 * @return current white balance. null if white balance setting is not 2418 * supported. 2419 * @see #WHITE_BALANCE_AUTO 2420 * @see #WHITE_BALANCE_INCANDESCENT 2421 * @see #WHITE_BALANCE_FLUORESCENT 2422 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2423 * @see #WHITE_BALANCE_DAYLIGHT 2424 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2425 * @see #WHITE_BALANCE_TWILIGHT 2426 * @see #WHITE_BALANCE_SHADE 2427 * 2428 */ 2429 public String getWhiteBalance() { 2430 return get(KEY_WHITE_BALANCE); 2431 } 2432 2433 /** 2434 * Sets the white balance. 2435 * 2436 * @param value new white balance. 2437 * @see #getWhiteBalance() 2438 */ 2439 public void setWhiteBalance(String value) { 2440 set(KEY_WHITE_BALANCE, value); 2441 } 2442 2443 /** 2444 * Gets the supported white balance. 2445 * 2446 * @return a list of supported white balance. null if white balance 2447 * setting is not supported. 2448 * @see #getWhiteBalance() 2449 */ 2450 public List<String> getSupportedWhiteBalance() { 2451 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2452 return split(str); 2453 } 2454 2455 /** 2456 * Gets the current color effect setting. 2457 * 2458 * @return current color effect. null if color effect 2459 * setting is not supported. 2460 * @see #EFFECT_NONE 2461 * @see #EFFECT_MONO 2462 * @see #EFFECT_NEGATIVE 2463 * @see #EFFECT_SOLARIZE 2464 * @see #EFFECT_SEPIA 2465 * @see #EFFECT_POSTERIZE 2466 * @see #EFFECT_WHITEBOARD 2467 * @see #EFFECT_BLACKBOARD 2468 * @see #EFFECT_AQUA 2469 */ 2470 public String getColorEffect() { 2471 return get(KEY_EFFECT); 2472 } 2473 2474 /** 2475 * Sets the current color effect setting. 2476 * 2477 * @param value new color effect. 2478 * @see #getColorEffect() 2479 */ 2480 public void setColorEffect(String value) { 2481 set(KEY_EFFECT, value); 2482 } 2483 2484 /** 2485 * Gets the supported color effects. 2486 * 2487 * @return a list of supported color effects. null if color effect 2488 * setting is not supported. 2489 * @see #getColorEffect() 2490 */ 2491 public List<String> getSupportedColorEffects() { 2492 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2493 return split(str); 2494 } 2495 2496 2497 /** 2498 * Gets the current antibanding setting. 2499 * 2500 * @return current antibanding. null if antibanding setting is not 2501 * supported. 2502 * @see #ANTIBANDING_AUTO 2503 * @see #ANTIBANDING_50HZ 2504 * @see #ANTIBANDING_60HZ 2505 * @see #ANTIBANDING_OFF 2506 */ 2507 public String getAntibanding() { 2508 return get(KEY_ANTIBANDING); 2509 } 2510 2511 /** 2512 * Sets the antibanding. 2513 * 2514 * @param antibanding new antibanding value. 2515 * @see #getAntibanding() 2516 */ 2517 public void setAntibanding(String antibanding) { 2518 set(KEY_ANTIBANDING, antibanding); 2519 } 2520 2521 /** 2522 * Gets the supported antibanding values. 2523 * 2524 * @return a list of supported antibanding values. null if antibanding 2525 * setting is not supported. 2526 * @see #getAntibanding() 2527 */ 2528 public List<String> getSupportedAntibanding() { 2529 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2530 return split(str); 2531 } 2532 2533 /** 2534 * Gets the current scene mode setting. 2535 * 2536 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2537 * setting is not supported. 2538 * @see #SCENE_MODE_AUTO 2539 * @see #SCENE_MODE_ACTION 2540 * @see #SCENE_MODE_PORTRAIT 2541 * @see #SCENE_MODE_LANDSCAPE 2542 * @see #SCENE_MODE_NIGHT 2543 * @see #SCENE_MODE_NIGHT_PORTRAIT 2544 * @see #SCENE_MODE_THEATRE 2545 * @see #SCENE_MODE_BEACH 2546 * @see #SCENE_MODE_SNOW 2547 * @see #SCENE_MODE_SUNSET 2548 * @see #SCENE_MODE_STEADYPHOTO 2549 * @see #SCENE_MODE_FIREWORKS 2550 * @see #SCENE_MODE_SPORTS 2551 * @see #SCENE_MODE_PARTY 2552 * @see #SCENE_MODE_CANDLELIGHT 2553 */ 2554 public String getSceneMode() { 2555 return get(KEY_SCENE_MODE); 2556 } 2557 2558 /** 2559 * Sets the scene mode. Changing scene mode may override other 2560 * parameters (such as flash mode, focus mode, white balance). For 2561 * example, suppose originally flash mode is on and supported flash 2562 * modes are on/off. In night scene mode, both flash mode and supported 2563 * flash mode may be changed to off. After setting scene mode, 2564 * applications should call getParameters to know if some parameters are 2565 * changed. 2566 * 2567 * @param value scene mode. 2568 * @see #getSceneMode() 2569 */ 2570 public void setSceneMode(String value) { 2571 set(KEY_SCENE_MODE, value); 2572 } 2573 2574 /** 2575 * Gets the supported scene modes. 2576 * 2577 * @return a list of supported scene modes. null if scene mode setting 2578 * is not supported. 2579 * @see #getSceneMode() 2580 */ 2581 public List<String> getSupportedSceneModes() { 2582 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2583 return split(str); 2584 } 2585 2586 /** 2587 * Gets the current flash mode setting. 2588 * 2589 * @return current flash mode. null if flash mode setting is not 2590 * supported. 2591 * @see #FLASH_MODE_OFF 2592 * @see #FLASH_MODE_AUTO 2593 * @see #FLASH_MODE_ON 2594 * @see #FLASH_MODE_RED_EYE 2595 * @see #FLASH_MODE_TORCH 2596 */ 2597 public String getFlashMode() { 2598 return get(KEY_FLASH_MODE); 2599 } 2600 2601 /** 2602 * Sets the flash mode. 2603 * 2604 * @param value flash mode. 2605 * @see #getFlashMode() 2606 */ 2607 public void setFlashMode(String value) { 2608 set(KEY_FLASH_MODE, value); 2609 } 2610 2611 /** 2612 * Gets the supported flash modes. 2613 * 2614 * @return a list of supported flash modes. null if flash mode setting 2615 * is not supported. 2616 * @see #getFlashMode() 2617 */ 2618 public List<String> getSupportedFlashModes() { 2619 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2620 return split(str); 2621 } 2622 2623 /** 2624 * Gets the current focus mode setting. 2625 * 2626 * @return current focus mode. This method will always return a non-null 2627 * value. Applications should call {@link 2628 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2629 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2630 * @see #FOCUS_MODE_AUTO 2631 * @see #FOCUS_MODE_INFINITY 2632 * @see #FOCUS_MODE_MACRO 2633 * @see #FOCUS_MODE_FIXED 2634 * @see #FOCUS_MODE_EDOF 2635 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2636 */ 2637 public String getFocusMode() { 2638 return get(KEY_FOCUS_MODE); 2639 } 2640 2641 /** 2642 * Sets the focus mode. 2643 * 2644 * @param value focus mode. 2645 * @see #getFocusMode() 2646 */ 2647 public void setFocusMode(String value) { 2648 set(KEY_FOCUS_MODE, value); 2649 } 2650 2651 /** 2652 * Gets the supported focus modes. 2653 * 2654 * @return a list of supported focus modes. This method will always 2655 * return a list with at least one element. 2656 * @see #getFocusMode() 2657 */ 2658 public List<String> getSupportedFocusModes() { 2659 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2660 return split(str); 2661 } 2662 2663 /** 2664 * Gets the focal length (in millimeter) of the camera. 2665 * 2666 * @return the focal length. This method will always return a valid 2667 * value. 2668 */ 2669 public float getFocalLength() { 2670 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2671 } 2672 2673 /** 2674 * Gets the horizontal angle of view in degrees. 2675 * 2676 * @return horizontal angle of view. This method will always return a 2677 * valid value. 2678 */ 2679 public float getHorizontalViewAngle() { 2680 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2681 } 2682 2683 /** 2684 * Gets the vertical angle of view in degrees. 2685 * 2686 * @return vertical angle of view. This method will always return a 2687 * valid value. 2688 */ 2689 public float getVerticalViewAngle() { 2690 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2691 } 2692 2693 /** 2694 * Gets the current exposure compensation index. 2695 * 2696 * @return current exposure compensation index. The range is {@link 2697 * #getMinExposureCompensation} to {@link 2698 * #getMaxExposureCompensation}. 0 means exposure is not 2699 * adjusted. 2700 */ 2701 public int getExposureCompensation() { 2702 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2703 } 2704 2705 /** 2706 * Sets the exposure compensation index. 2707 * 2708 * @param value exposure compensation index. The valid value range is 2709 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2710 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2711 * not adjusted. Application should call 2712 * getMinExposureCompensation and getMaxExposureCompensation to 2713 * know if exposure compensation is supported. 2714 */ 2715 public void setExposureCompensation(int value) { 2716 set(KEY_EXPOSURE_COMPENSATION, value); 2717 } 2718 2719 /** 2720 * Gets the maximum exposure compensation index. 2721 * 2722 * @return maximum exposure compensation index (>=0). If both this 2723 * method and {@link #getMinExposureCompensation} return 0, 2724 * exposure compensation is not supported. 2725 */ 2726 public int getMaxExposureCompensation() { 2727 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2728 } 2729 2730 /** 2731 * Gets the minimum exposure compensation index. 2732 * 2733 * @return minimum exposure compensation index (<=0). If both this 2734 * method and {@link #getMaxExposureCompensation} return 0, 2735 * exposure compensation is not supported. 2736 */ 2737 public int getMinExposureCompensation() { 2738 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2739 } 2740 2741 /** 2742 * Gets the exposure compensation step. 2743 * 2744 * @return exposure compensation step. Applications can get EV by 2745 * multiplying the exposure compensation index and step. Ex: if 2746 * exposure compensation index is -6 and step is 0.333333333, EV 2747 * is -2. 2748 */ 2749 public float getExposureCompensationStep() { 2750 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2751 } 2752 2753 /** 2754 * <p>Sets the auto-exposure lock state. Applications should check 2755 * {@link #isAutoExposureLockSupported} before using this method.</p> 2756 * 2757 * <p>If set to true, the camera auto-exposure routine will immediately 2758 * pause until the lock is set to false. Exposure compensation settings 2759 * changes will still take effect while auto-exposure is locked.</p> 2760 * 2761 * <p>If auto-exposure is already locked, setting this to true again has 2762 * no effect (the driver will not recalculate exposure values).</p> 2763 * 2764 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2765 * image capture with {@link #takePicture(Camera.ShutterCallback, 2766 * Camera.PictureCallback, Camera.PictureCallback)}, will automatically 2767 * set the lock to false. However, the lock can be re-enabled before 2768 * preview is re-started to keep the same AE parameters.</p> 2769 * 2770 * <p>Exposure compensation, in conjunction with re-enabling the AE and 2771 * AWB locks after each still capture, can be used to capture an 2772 * exposure-bracketed burst of images, for example.</p> 2773 * 2774 * <p>Auto-exposure state, including the lock state, will not be 2775 * maintained after camera {@link #release()} is called. Locking 2776 * auto-exposure after {@link #open()} but before the first call to 2777 * {@link #startPreview()} will not allow the auto-exposure routine to 2778 * run at all, and may result in severely over- or under-exposed 2779 * images.</p> 2780 * 2781 * <p>The driver may also independently lock auto-exposure after 2782 * auto-focus completes. If this is undesirable, be sure to always set 2783 * the auto-exposure lock to false after the 2784 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2785 * received. The {@link #getAutoExposureLock()} method can be used after 2786 * the callback to determine if the camera has locked auto-exposure 2787 * independently.</p> 2788 * 2789 * @param toggle new state of the auto-exposure lock. True means that 2790 * auto-exposure is locked, false means that the auto-exposure 2791 * routine is free to run normally. 2792 * 2793 * @see #getAutoExposureLock() 2794 */ 2795 public void setAutoExposureLock(boolean toggle) { 2796 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 2797 } 2798 2799 /** 2800 * Gets the state of the auto-exposure lock. Applications should check 2801 * {@link #isAutoExposureLockSupported} before using this method. See 2802 * {@link #setAutoExposureLock} for details about the lock. 2803 * 2804 * @return State of the auto-exposure lock. Returns true if 2805 * auto-exposure is currently locked, and false otherwise. The 2806 * auto-exposure lock may be independently enabled by the camera 2807 * subsystem when auto-focus has completed. This method can be 2808 * used after the {@link AutoFocusCallback#onAutoFocus(boolean, 2809 * Camera)} callback to determine if the camera has locked AE. 2810 * 2811 * @see #setAutoExposureLock(boolean) 2812 * 2813 */ 2814 public boolean getAutoExposureLock() { 2815 String str = get(KEY_AUTO_EXPOSURE_LOCK); 2816 return TRUE.equals(str); 2817 } 2818 2819 /** 2820 * Returns true if auto-exposure locking is supported. Applications 2821 * should call this before trying to lock auto-exposure. See 2822 * {@link #setAutoExposureLock} for details about the lock. 2823 * 2824 * @return true if auto-exposure lock is supported. 2825 * @see #setAutoExposureLock(boolean) 2826 * 2827 */ 2828 public boolean isAutoExposureLockSupported() { 2829 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 2830 return TRUE.equals(str); 2831 } 2832 2833 /** 2834 * <p>Sets the auto-white balance lock state. Applications should check 2835 * {@link #isAutoWhiteBalanceLockSupported} before using this 2836 * method.</p> 2837 * 2838 * <p>If set to true, the camera auto-white balance routine will 2839 * immediately pause until the lock is set to false.</p> 2840 * 2841 * <p>If auto-white balance is already locked, setting this to true 2842 * again has no effect (the driver will not recalculate white balance 2843 * values).</p> 2844 * 2845 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2846 * image capture with {@link #takePicture(Camera.ShutterCallback, 2847 * Camera.PictureCallback, Camera.PictureCallback)}, will automatically 2848 * set the lock to false. However, the lock can be re-enabled before 2849 * preview is re-started to keep the same white balance parameters.</p> 2850 * 2851 * <p>Exposure compensation, in conjunction with re-enabling the AE and 2852 * AWB locks after each still capture, can be used to capture an 2853 * exposure-bracketed burst of images, for example. Auto-white balance 2854 * state, including the lock state, will not be maintained after camera 2855 * {@link #release()} is called. Locking auto-white balance after 2856 * {@link #open()} but before the first call to {@link #startPreview()} 2857 * will not allow the auto-white balance routine to run at all, and may 2858 * result in severely incorrect color in captured images.</p> 2859 * 2860 * <p>The driver may also independently lock auto-white balance after 2861 * auto-focus completes. If this is undesirable, be sure to always set 2862 * the auto-white balance lock to false after the 2863 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2864 * received. The {@link #getAutoWhiteBalanceLock()} method can be used 2865 * after the callback to determine if the camera has locked auto-white 2866 * balance independently.</p> 2867 * 2868 * @param toggle new state of the auto-white balance lock. True means 2869 * that auto-white balance is locked, false means that the 2870 * auto-white balance routine is free to run normally. 2871 * 2872 * @see #getAutoWhiteBalanceLock() 2873 */ 2874 public void setAutoWhiteBalanceLock(boolean toggle) { 2875 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 2876 } 2877 2878 /** 2879 * Gets the state of the auto-white balance lock. Applications should 2880 * check {@link #isAutoWhiteBalanceLockSupported} before using this 2881 * method. See {@link #setAutoWhiteBalanceLock} for details about the 2882 * lock. 2883 * 2884 * @return State of the auto-white balance lock. Returns true if 2885 * auto-white balance is currently locked, and false 2886 * otherwise. The auto-white balance lock may be independently 2887 * enabled by the camera subsystem when auto-focus has 2888 * completed. This method can be used after the 2889 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 2890 * callback to determine if the camera has locked AWB. 2891 * 2892 * @see #setAutoWhiteBalanceLock(boolean) 2893 * 2894 */ 2895 public boolean getAutoWhiteBalanceLock() { 2896 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 2897 return TRUE.equals(str); 2898 } 2899 2900 /** 2901 * Returns true if auto-white balance locking is supported. Applications 2902 * should call this before trying to lock auto-white balance. See 2903 * {@link #setAutoWhiteBalanceLock} for details about the lock. 2904 * 2905 * @return true if auto-white balance lock is supported. 2906 * @see #setAutoWhiteBalanceLock(boolean) 2907 * 2908 */ 2909 public boolean isAutoWhiteBalanceLockSupported() { 2910 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 2911 return TRUE.equals(str); 2912 } 2913 2914 /** 2915 * Gets current zoom value. This also works when smooth zoom is in 2916 * progress. Applications should check {@link #isZoomSupported} before 2917 * using this method. 2918 * 2919 * @return the current zoom value. The range is 0 to {@link 2920 * #getMaxZoom}. 0 means the camera is not zoomed. 2921 */ 2922 public int getZoom() { 2923 return getInt(KEY_ZOOM, 0); 2924 } 2925 2926 /** 2927 * Sets current zoom value. If the camera is zoomed (value > 0), the 2928 * actual picture size may be smaller than picture size setting. 2929 * Applications can check the actual picture size after picture is 2930 * returned from {@link PictureCallback}. The preview size remains the 2931 * same in zoom. Applications should check {@link #isZoomSupported} 2932 * before using this method. 2933 * 2934 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2935 */ 2936 public void setZoom(int value) { 2937 set(KEY_ZOOM, value); 2938 } 2939 2940 /** 2941 * Returns true if zoom is supported. Applications should call this 2942 * before using other zoom methods. 2943 * 2944 * @return true if zoom is supported. 2945 */ 2946 public boolean isZoomSupported() { 2947 String str = get(KEY_ZOOM_SUPPORTED); 2948 return TRUE.equals(str); 2949 } 2950 2951 /** 2952 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2953 * value that applications can set to {@link #setZoom(int)}. 2954 * Applications should call {@link #isZoomSupported} before using this 2955 * method. This value may change in different preview size. Applications 2956 * should call this again after setting preview size. 2957 * 2958 * @return the maximum zoom value supported by the camera. 2959 */ 2960 public int getMaxZoom() { 2961 return getInt(KEY_MAX_ZOOM, 0); 2962 } 2963 2964 /** 2965 * Gets the zoom ratios of all zoom values. Applications should check 2966 * {@link #isZoomSupported} before using this method. 2967 * 2968 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2969 * returned as 320. The number of elements is {@link 2970 * #getMaxZoom} + 1. The list is sorted from small to large. The 2971 * first element is always 100. The last element is the zoom 2972 * ratio of the maximum zoom value. 2973 */ 2974 public List<Integer> getZoomRatios() { 2975 return splitInt(get(KEY_ZOOM_RATIOS)); 2976 } 2977 2978 /** 2979 * Returns true if smooth zoom is supported. Applications should call 2980 * this before using other smooth zoom methods. 2981 * 2982 * @return true if smooth zoom is supported. 2983 */ 2984 public boolean isSmoothZoomSupported() { 2985 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 2986 return TRUE.equals(str); 2987 } 2988 2989 /** 2990 * <p>Gets the distances from the camera to where an object appears to be 2991 * in focus. The object is sharpest at the optimal focus distance. The 2992 * depth of field is the far focus distance minus near focus distance.</p> 2993 * 2994 * <p>Focus distances may change after calling {@link 2995 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 2996 * #startPreview()}. Applications can call {@link #getParameters()} 2997 * and this method anytime to get the latest focus distances. If the 2998 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 2999 * from time to time.</p> 3000 * 3001 * <p>This method is intended to estimate the distance between the camera 3002 * and the subject. After autofocus, the subject distance may be within 3003 * near and far focus distance. However, the precision depends on the 3004 * camera hardware, autofocus algorithm, the focus area, and the scene. 3005 * The error can be large and it should be only used as a reference.</p> 3006 * 3007 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3008 * If the focus distance is infinity, the value will be 3009 * {@code Float.POSITIVE_INFINITY}.</p> 3010 * 3011 * @param output focus distances in meters. output must be a float 3012 * array with three elements. Near focus distance, optimal focus 3013 * distance, and far focus distance will be filled in the array. 3014 * @see #FOCUS_DISTANCE_NEAR_INDEX 3015 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3016 * @see #FOCUS_DISTANCE_FAR_INDEX 3017 */ 3018 public void getFocusDistances(float[] output) { 3019 if (output == null || output.length != 3) { 3020 throw new IllegalArgumentException( 3021 "output must be an float array with three elements."); 3022 } 3023 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3024 } 3025 3026 /** 3027 * Gets the maximum number of focus areas supported. This is the maximum 3028 * length of the list in {@link #setFocusAreas(List)} and 3029 * {@link #getFocusAreas()}. 3030 * 3031 * @return the maximum number of focus areas supported by the camera. 3032 * @see #getFocusAreas() 3033 */ 3034 public int getMaxNumFocusAreas() { 3035 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3036 } 3037 3038 /** 3039 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3040 * focus.</p> 3041 * 3042 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3043 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3044 * focus areas first. If the value is 0, focus area is not supported.</p> 3045 * 3046 * <p>Each focus area is a rectangle with specified weight. The direction 3047 * is relative to the sensor orientation, that is, what the sensor sees. 3048 * The direction is not affected by the rotation or mirroring of 3049 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3050 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3051 * (1000, 1000) is the lower right point. The width and height of focus 3052 * areas cannot be 0 or negative.</p> 3053 * 3054 * <p>The weight must range from 1 to 1000. The weight should be 3055 * interpreted as a per-pixel weight - all pixels in the area have the 3056 * specified weight. This means a small area with the same weight as a 3057 * larger area will have less influence on the focusing than the larger 3058 * area. Focus areas can partially overlap and the driver will add the 3059 * weights in the overlap region.</p> 3060 * 3061 * <p>A special case of a {@code null} focus area list means the driver is 3062 * free to select focus targets as it wants. For example, the driver may 3063 * use more signals to select focus areas and change them 3064 * dynamically. Apps can set the focus area list to {@code null} if they 3065 * want the driver to completely control focusing.</p> 3066 * 3067 * <p>Focus areas are relative to the current field of view 3068 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3069 * represents the top of the currently visible camera frame. The focus 3070 * area cannot be set to be outside the current field of view, even 3071 * when using zoom.</p> 3072 * 3073 * <p>Focus area only has effect if the current focus mode is 3074 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, or 3075 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}.</p> 3076 * 3077 * @return a list of current focus areas 3078 */ 3079 public List<Area> getFocusAreas() { 3080 return splitArea(get(KEY_FOCUS_AREAS)); 3081 } 3082 3083 /** 3084 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3085 * 3086 * @param focusAreas the focus areas 3087 * @see #getFocusAreas() 3088 */ 3089 public void setFocusAreas(List<Area> focusAreas) { 3090 set(KEY_FOCUS_AREAS, focusAreas); 3091 } 3092 3093 /** 3094 * Gets the maximum number of metering areas supported. This is the 3095 * maximum length of the list in {@link #setMeteringAreas(List)} and 3096 * {@link #getMeteringAreas()}. 3097 * 3098 * @return the maximum number of metering areas supported by the camera. 3099 * @see #getMeteringAreas() 3100 */ 3101 public int getMaxNumMeteringAreas() { 3102 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3103 } 3104 3105 /** 3106 * <p>Gets the current metering areas. Camera driver uses these areas to 3107 * decide exposure.</p> 3108 * 3109 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3110 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3111 * metering areas first. If the value is 0, metering area is not 3112 * supported.</p> 3113 * 3114 * <p>Each metering area is a rectangle with specified weight. The 3115 * direction is relative to the sensor orientation, that is, what the 3116 * sensor sees. The direction is not affected by the rotation or 3117 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3118 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3119 * point. (1000, 1000) is the lower right point. The width and height of 3120 * metering areas cannot be 0 or negative.</p> 3121 * 3122 * <p>The weight must range from 1 to 1000, and represents a weight for 3123 * every pixel in the area. This means that a large metering area with 3124 * the same weight as a smaller area will have more effect in the 3125 * metering result. Metering areas can partially overlap and the driver 3126 * will add the weights in the overlap region.</p> 3127 * 3128 * <p>A special case of a {@code null} metering area list means the driver 3129 * is free to meter as it chooses. For example, the driver may use more 3130 * signals to select metering areas and change them dynamically. Apps 3131 * can set the metering area list to {@code null} if they want the 3132 * driver to completely control metering.</p> 3133 * 3134 * <p>Metering areas are relative to the current field of view 3135 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3136 * represents the top of the currently visible camera frame. The 3137 * metering area cannot be set to be outside the current field of view, 3138 * even when using zoom.</p> 3139 * 3140 * <p>No matter what metering areas are, the final exposure are compensated 3141 * by {@link #setExposureCompensation(int)}.</p> 3142 * 3143 * @return a list of current metering areas 3144 */ 3145 public List<Area> getMeteringAreas() { 3146 return splitArea(get(KEY_METERING_AREAS)); 3147 } 3148 3149 /** 3150 * Sets metering areas. See {@link #getMeteringAreas()} for 3151 * documentation. 3152 * 3153 * @param meteringAreas the metering areas 3154 * @see #getMeteringAreas() 3155 */ 3156 public void setMeteringAreas(List<Area> meteringAreas) { 3157 set(KEY_METERING_AREAS, meteringAreas); 3158 } 3159 3160 /** 3161 * Gets the maximum number of detected faces supported. This is the 3162 * maximum length of the list returned from {@link FaceDetectionListener}. 3163 * If the return value is 0, face detection of the specified type is not 3164 * supported. 3165 * 3166 * @return the maximum number of detected face supported by the camera. 3167 * @see #startFaceDetection(int) 3168 * @hide 3169 */ 3170 public int getMaxNumDetectedFaces(int type) { 3171 if (type == CAMERA_FACE_DETECTION_HW) { 3172 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3173 } else if (type == CAMERA_FACE_DETECTION_SW){ 3174 return getInt(KEY_MAX_NUM_DETECTED_FACES_SW, 0); 3175 } 3176 throw new IllegalArgumentException("Invalid face detection type " + type); 3177 } 3178 3179 /** 3180 * Sets recording mode hint. This tells the camera that the intent of 3181 * the application is to record videos {@link 3182 * android.media.MediaRecorder#start()}, not to take still pictures 3183 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3184 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3185 * allow MediaRecorder.start() to start faster or with fewer glitches on 3186 * output. This should be called before starting preview for the best 3187 * result, but can be changed while the preview is active. The default 3188 * value is false. 3189 * 3190 * The app can still call takePicture() when the hint is true or call 3191 * MediaRecorder.start() when the hint is false. But the performance may 3192 * be worse. 3193 * 3194 * @param hint true if the apps intend to record videos using 3195 * {@link android.media.MediaRecorder}. 3196 */ 3197 public void setRecordingHint(boolean hint) { 3198 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3199 } 3200 3201 // Splits a comma delimited string to an ArrayList of String. 3202 // Return null if the passing string is null or the size is 0. 3203 private ArrayList<String> split(String str) { 3204 if (str == null) return null; 3205 3206 // Use StringTokenizer because it is faster than split. 3207 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3208 ArrayList<String> substrings = new ArrayList<String>(); 3209 while (tokenizer.hasMoreElements()) { 3210 substrings.add(tokenizer.nextToken()); 3211 } 3212 return substrings; 3213 } 3214 3215 // Splits a comma delimited string to an ArrayList of Integer. 3216 // Return null if the passing string is null or the size is 0. 3217 private ArrayList<Integer> splitInt(String str) { 3218 if (str == null) return null; 3219 3220 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3221 ArrayList<Integer> substrings = new ArrayList<Integer>(); 3222 while (tokenizer.hasMoreElements()) { 3223 String token = tokenizer.nextToken(); 3224 substrings.add(Integer.parseInt(token)); 3225 } 3226 if (substrings.size() == 0) return null; 3227 return substrings; 3228 } 3229 3230 private void splitInt(String str, int[] output) { 3231 if (str == null) return; 3232 3233 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3234 int index = 0; 3235 while (tokenizer.hasMoreElements()) { 3236 String token = tokenizer.nextToken(); 3237 output[index++] = Integer.parseInt(token); 3238 } 3239 } 3240 3241 // Splits a comma delimited string to an ArrayList of Float. 3242 private void splitFloat(String str, float[] 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++] = Float.parseFloat(token); 3250 } 3251 } 3252 3253 // Returns the value of a float parameter. 3254 private float getFloat(String key, float defaultValue) { 3255 try { 3256 return Float.parseFloat(mMap.get(key)); 3257 } catch (NumberFormatException ex) { 3258 return defaultValue; 3259 } 3260 } 3261 3262 // Returns the value of a integer parameter. 3263 private int getInt(String key, int defaultValue) { 3264 try { 3265 return Integer.parseInt(mMap.get(key)); 3266 } catch (NumberFormatException ex) { 3267 return defaultValue; 3268 } 3269 } 3270 3271 // Splits a comma delimited string to an ArrayList of Size. 3272 // Return null if the passing string is null or the size is 0. 3273 private ArrayList<Size> splitSize(String str) { 3274 if (str == null) return null; 3275 3276 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3277 ArrayList<Size> sizeList = new ArrayList<Size>(); 3278 while (tokenizer.hasMoreElements()) { 3279 Size size = strToSize(tokenizer.nextToken()); 3280 if (size != null) sizeList.add(size); 3281 } 3282 if (sizeList.size() == 0) return null; 3283 return sizeList; 3284 } 3285 3286 // Parses a string (ex: "480x320") to Size object. 3287 // Return null if the passing string is null. 3288 private Size strToSize(String str) { 3289 if (str == null) return null; 3290 3291 int pos = str.indexOf('x'); 3292 if (pos != -1) { 3293 String width = str.substring(0, pos); 3294 String height = str.substring(pos + 1); 3295 return new Size(Integer.parseInt(width), 3296 Integer.parseInt(height)); 3297 } 3298 Log.e(TAG, "Invalid size parameter string=" + str); 3299 return null; 3300 } 3301 3302 // Splits a comma delimited string to an ArrayList of int array. 3303 // Example string: "(10000,26623),(10000,30000)". Return null if the 3304 // passing string is null or the size is 0. 3305 private ArrayList<int[]> splitRange(String str) { 3306 if (str == null || str.charAt(0) != '(' 3307 || str.charAt(str.length() - 1) != ')') { 3308 Log.e(TAG, "Invalid range list string=" + str); 3309 return null; 3310 } 3311 3312 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3313 int endIndex, fromIndex = 1; 3314 do { 3315 int[] range = new int[2]; 3316 endIndex = str.indexOf("),(", fromIndex); 3317 if (endIndex == -1) endIndex = str.length() - 1; 3318 splitInt(str.substring(fromIndex, endIndex), range); 3319 rangeList.add(range); 3320 fromIndex = endIndex + 3; 3321 } while (endIndex != str.length() - 1); 3322 3323 if (rangeList.size() == 0) return null; 3324 return rangeList; 3325 } 3326 3327 // Splits a comma delimited string to an ArrayList of Area objects. 3328 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3329 // the passing string is null or the size is 0 or (0,0,0,0,0). 3330 private ArrayList<Area> splitArea(String str) { 3331 if (str == null || str.charAt(0) != '(' 3332 || str.charAt(str.length() - 1) != ')') { 3333 Log.e(TAG, "Invalid area string=" + str); 3334 return null; 3335 } 3336 3337 ArrayList<Area> result = new ArrayList<Area>(); 3338 int endIndex, fromIndex = 1; 3339 int[] array = new int[5]; 3340 do { 3341 endIndex = str.indexOf("),(", fromIndex); 3342 if (endIndex == -1) endIndex = str.length() - 1; 3343 splitInt(str.substring(fromIndex, endIndex), array); 3344 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3345 result.add(new Area(rect, array[4])); 3346 fromIndex = endIndex + 3; 3347 } while (endIndex != str.length() - 1); 3348 3349 if (result.size() == 0) return null; 3350 3351 if (result.size() == 1) { 3352 Area area = result.get(0); 3353 Rect rect = area.rect; 3354 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3355 && rect.bottom == 0 && area.weight == 0) { 3356 return null; 3357 } 3358 } 3359 3360 return result; 3361 } 3362 }; 3363} 3364