Camera.java revision 8ea56f68517ffa42bd5f43ab67f4ebfcfcb0cd23
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.app.ActivityThread; 20import android.annotation.SdkConstant; 21import android.annotation.SdkConstant.SdkConstantType; 22import android.content.Context; 23import android.graphics.ImageFormat; 24import android.graphics.Point; 25import android.graphics.Rect; 26import android.graphics.SurfaceTexture; 27import android.media.IAudioService; 28import android.os.Handler; 29import android.os.IBinder; 30import android.os.Looper; 31import android.os.Message; 32import android.os.RemoteException; 33import android.os.ServiceManager; 34import android.renderscript.Allocation; 35import android.renderscript.Element; 36import android.renderscript.RenderScript; 37import android.renderscript.RSIllegalArgumentException; 38import android.renderscript.Type; 39import android.util.Log; 40import android.text.TextUtils; 41import android.view.Surface; 42import android.view.SurfaceHolder; 43 44import java.io.IOException; 45import java.lang.ref.WeakReference; 46import java.util.ArrayList; 47import java.util.LinkedHashMap; 48import java.util.List; 49 50import static android.system.OsConstants.*; 51 52/** 53 * The Camera class is used to set image capture settings, start/stop preview, 54 * snap pictures, and retrieve frames for encoding for video. This class is a 55 * client for the Camera service, which manages the actual camera hardware. 56 * 57 * <p>To access the device camera, you must declare the 58 * {@link android.Manifest.permission#CAMERA} permission in your Android 59 * Manifest. Also be sure to include the 60 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 61 * manifest element to declare camera features used by your application. 62 * For example, if you use the camera and auto-focus feature, your Manifest 63 * should include the following:</p> 64 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 65 * <uses-feature android:name="android.hardware.camera" /> 66 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 67 * 68 * <p>To take pictures with this class, use the following steps:</p> 69 * 70 * <ol> 71 * <li>Obtain an instance of Camera from {@link #open(int)}. 72 * 73 * <li>Get existing (default) settings with {@link #getParameters()}. 74 * 75 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 76 * {@link #setParameters(Camera.Parameters)}. 77 * 78 * <li>If desired, call {@link #setDisplayOrientation(int)}. 79 * 80 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 81 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 82 * will be unable to start the preview. 83 * 84 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 85 * preview surface. Preview must be started before you can take a picture. 86 * 87 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 88 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 89 * capture a photo. Wait for the callbacks to provide the actual image data. 90 * 91 * <li>After taking a picture, preview display will have stopped. To take more 92 * photos, call {@link #startPreview()} again first. 93 * 94 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 95 * 96 * <li><b>Important:</b> Call {@link #release()} to release the camera for 97 * use by other applications. Applications should release the camera 98 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 99 * it in {@link android.app.Activity#onResume()}). 100 * </ol> 101 * 102 * <p>To quickly switch to video recording mode, use these steps:</p> 103 * 104 * <ol> 105 * <li>Obtain and initialize a Camera and start preview as described above. 106 * 107 * <li>Call {@link #unlock()} to allow the media process to access the camera. 108 * 109 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 110 * See {@link android.media.MediaRecorder} information about video recording. 111 * 112 * <li>When finished recording, call {@link #reconnect()} to re-acquire 113 * and re-lock the camera. 114 * 115 * <li>If desired, restart preview and take more photos or videos. 116 * 117 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 118 * </ol> 119 * 120 * <p>This class is not thread-safe, and is meant for use from one event thread. 121 * Most long-running operations (preview, focus, photo capture, etc) happen 122 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 123 * on the event thread {@link #open(int)} was called from. This class's methods 124 * must never be called from multiple threads at once.</p> 125 * 126 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 127 * may have different hardware specifications, such as megapixel ratings and 128 * auto-focus capabilities. In order for your application to be compatible with 129 * more devices, you should not make assumptions about the device camera 130 * specifications.</p> 131 * 132 * <div class="special reference"> 133 * <h3>Developer Guides</h3> 134 * <p>For more information about using cameras, read the 135 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 136 * </div> 137 * 138 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 139 * applications. 140 */ 141@Deprecated 142public class Camera { 143 private static final String TAG = "Camera"; 144 145 // These match the enums in frameworks/base/include/camera/Camera.h 146 private static final int CAMERA_MSG_ERROR = 0x001; 147 private static final int CAMERA_MSG_SHUTTER = 0x002; 148 private static final int CAMERA_MSG_FOCUS = 0x004; 149 private static final int CAMERA_MSG_ZOOM = 0x008; 150 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 151 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 152 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 153 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 154 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 155 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 156 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 157 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 158 159 private long mNativeContext; // accessed by native methods 160 private EventHandler mEventHandler; 161 private ShutterCallback mShutterCallback; 162 private PictureCallback mRawImageCallback; 163 private PictureCallback mJpegCallback; 164 private PreviewCallback mPreviewCallback; 165 private boolean mUsingPreviewAllocation; 166 private PictureCallback mPostviewCallback; 167 private AutoFocusCallback mAutoFocusCallback; 168 private AutoFocusMoveCallback mAutoFocusMoveCallback; 169 private OnZoomChangeListener mZoomListener; 170 private FaceDetectionListener mFaceListener; 171 private ErrorCallback mErrorCallback; 172 private boolean mOneShot; 173 private boolean mWithBuffer; 174 private boolean mFaceDetectionRunning = false; 175 private final Object mAutoFocusCallbackLock = new Object(); 176 177 private static final int NO_ERROR = 0; 178 179 /** 180 * Broadcast Action: A new picture is taken by the camera, and the entry of 181 * the picture has been added to the media store. 182 * {@link android.content.Intent#getData} is URI of the picture. 183 */ 184 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 185 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 186 187 /** 188 * Broadcast Action: A new video is recorded by the camera, and the entry 189 * of the video has been added to the media store. 190 * {@link android.content.Intent#getData} is URI of the video. 191 */ 192 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 193 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 194 195 /** 196 * Camera HAL device API version 1.0 197 * @hide 198 */ 199 public static final int CAMERA_HAL_API_VERSION_1_0 = 0x100; 200 201 /** 202 * A constant meaning the normal camera connect/open will be used. 203 */ 204 private static final int CAMERA_HAL_API_VERSION_NORMAL_CONNECT = -2; 205 206 /** 207 * Used to indicate HAL version un-specified. 208 */ 209 private static final int CAMERA_HAL_API_VERSION_UNSPECIFIED = -1; 210 211 /** 212 * Hardware face detection. It does not use much CPU. 213 */ 214 private static final int CAMERA_FACE_DETECTION_HW = 0; 215 216 /** 217 * Software face detection. It uses some CPU. 218 */ 219 private static final int CAMERA_FACE_DETECTION_SW = 1; 220 221 /** 222 * Returns the number of physical cameras available on this device. 223 */ 224 public native static int getNumberOfCameras(); 225 226 /** 227 * Returns the information about a particular camera. 228 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 229 */ 230 public static void getCameraInfo(int cameraId, CameraInfo cameraInfo) { 231 _getCameraInfo(cameraId, cameraInfo); 232 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 233 IAudioService audioService = IAudioService.Stub.asInterface(b); 234 try { 235 if (audioService.isCameraSoundForced()) { 236 // Only set this when sound is forced; otherwise let native code 237 // decide. 238 cameraInfo.canDisableShutterSound = false; 239 } 240 } catch (RemoteException e) { 241 Log.e(TAG, "Audio service is unavailable for queries"); 242 } 243 } 244 private native static void _getCameraInfo(int cameraId, CameraInfo cameraInfo); 245 246 /** 247 * Information about a camera 248 * 249 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 250 * applications. 251 */ 252 @Deprecated 253 public static class CameraInfo { 254 /** 255 * The facing of the camera is opposite to that of the screen. 256 */ 257 public static final int CAMERA_FACING_BACK = 0; 258 259 /** 260 * The facing of the camera is the same as that of the screen. 261 */ 262 public static final int CAMERA_FACING_FRONT = 1; 263 264 /** 265 * The direction that the camera faces. It should be 266 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 267 */ 268 public int facing; 269 270 /** 271 * <p>The orientation of the camera image. The value is the angle that the 272 * camera image needs to be rotated clockwise so it shows correctly on 273 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 274 * 275 * <p>For example, suppose a device has a naturally tall screen. The 276 * back-facing camera sensor is mounted in landscape. You are looking at 277 * the screen. If the top side of the camera sensor is aligned with the 278 * right edge of the screen in natural orientation, the value should be 279 * 90. If the top side of a front-facing camera sensor is aligned with 280 * the right of the screen, the value should be 270.</p> 281 * 282 * @see #setDisplayOrientation(int) 283 * @see Parameters#setRotation(int) 284 * @see Parameters#setPreviewSize(int, int) 285 * @see Parameters#setPictureSize(int, int) 286 * @see Parameters#setJpegThumbnailSize(int, int) 287 */ 288 public int orientation; 289 290 /** 291 * <p>Whether the shutter sound can be disabled.</p> 292 * 293 * <p>On some devices, the camera shutter sound cannot be turned off 294 * through {@link #enableShutterSound enableShutterSound}. This field 295 * can be used to determine whether a call to disable the shutter sound 296 * will succeed.</p> 297 * 298 * <p>If this field is set to true, then a call of 299 * {@code enableShutterSound(false)} will be successful. If set to 300 * false, then that call will fail, and the shutter sound will be played 301 * when {@link Camera#takePicture takePicture} is called.</p> 302 */ 303 public boolean canDisableShutterSound; 304 }; 305 306 /** 307 * Creates a new Camera object to access a particular hardware camera. If 308 * the same camera is opened by other applications, this will throw a 309 * RuntimeException. 310 * 311 * <p>You must call {@link #release()} when you are done using the camera, 312 * otherwise it will remain locked and be unavailable to other applications. 313 * 314 * <p>Your application should only have one Camera object active at a time 315 * for a particular hardware camera. 316 * 317 * <p>Callbacks from other methods are delivered to the event loop of the 318 * thread which called open(). If this thread has no event loop, then 319 * callbacks are delivered to the main application event loop. If there 320 * is no main application event loop, callbacks are not delivered. 321 * 322 * <p class="caution"><b>Caution:</b> On some devices, this method may 323 * take a long time to complete. It is best to call this method from a 324 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 325 * blocking the main application UI thread. 326 * 327 * @param cameraId the hardware camera to access, between 0 and 328 * {@link #getNumberOfCameras()}-1. 329 * @return a new Camera object, connected, locked and ready for use. 330 * @throws RuntimeException if opening the camera fails (for example, if the 331 * camera is in use by another process or device policy manager has 332 * disabled the camera). 333 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 334 */ 335 public static Camera open(int cameraId) { 336 return new Camera(cameraId); 337 } 338 339 /** 340 * Creates a new Camera object to access the first back-facing camera on the 341 * device. If the device does not have a back-facing camera, this returns 342 * null. 343 * @see #open(int) 344 */ 345 public static Camera open() { 346 int numberOfCameras = getNumberOfCameras(); 347 CameraInfo cameraInfo = new CameraInfo(); 348 for (int i = 0; i < numberOfCameras; i++) { 349 getCameraInfo(i, cameraInfo); 350 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 351 return new Camera(i); 352 } 353 } 354 return null; 355 } 356 357 /** 358 * Creates a new Camera object to access a particular hardware camera with 359 * given hal API version. If the same camera is opened by other applications 360 * or the hal API version is not supported by this device, this will throw a 361 * RuntimeException. 362 * <p> 363 * You must call {@link #release()} when you are done using the camera, 364 * otherwise it will remain locked and be unavailable to other applications. 365 * <p> 366 * Your application should only have one Camera object active at a time for 367 * a particular hardware camera. 368 * <p> 369 * Callbacks from other methods are delivered to the event loop of the 370 * thread which called open(). If this thread has no event loop, then 371 * callbacks are delivered to the main application event loop. If there is 372 * no main application event loop, callbacks are not delivered. 373 * <p class="caution"> 374 * <b>Caution:</b> On some devices, this method may take a long time to 375 * complete. It is best to call this method from a worker thread (possibly 376 * using {@link android.os.AsyncTask}) to avoid blocking the main 377 * application UI thread. 378 * 379 * @param cameraId The hardware camera to access, between 0 and 380 * {@link #getNumberOfCameras()}-1. 381 * @param halVersion The HAL API version this camera device to be opened as. 382 * @return a new Camera object, connected, locked and ready for use. 383 * 384 * @throws IllegalArgumentException if the {@code halVersion} is invalid 385 * 386 * @throws RuntimeException if opening the camera fails (for example, if the 387 * camera is in use by another process or device policy manager has disabled 388 * the camera). 389 * 390 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 391 * @see #CAMERA_HAL_API_VERSION_1_0 392 * 393 * @hide 394 */ 395 public static Camera openLegacy(int cameraId, int halVersion) { 396 if (halVersion < CAMERA_HAL_API_VERSION_1_0) { 397 throw new IllegalArgumentException("Invalid HAL version " + halVersion); 398 } 399 400 return new Camera(cameraId, halVersion); 401 } 402 403 /** 404 * Create a legacy camera object. 405 * 406 * @param cameraId The hardware camera to access, between 0 and 407 * {@link #getNumberOfCameras()}-1. 408 * @param halVersion The HAL API version this camera device to be opened as. 409 */ 410 private Camera(int cameraId, int halVersion) { 411 int err = cameraInitVersion(cameraId, halVersion); 412 if (checkInitErrors(err)) { 413 if (err == -EACCES) { 414 throw new RuntimeException("Fail to connect to camera service"); 415 } else if (err == -ENODEV) { 416 throw new RuntimeException("Camera initialization failed"); 417 } else if (err == -ENOSYS) { 418 throw new RuntimeException("Camera initialization failed because some methods" 419 + " are not implemented"); 420 } else if (err == -EOPNOTSUPP) { 421 throw new RuntimeException("Camera initialization failed because the hal" 422 + " version is not supported by this device"); 423 } else if (err == -EINVAL) { 424 throw new RuntimeException("Camera initialization failed because the input" 425 + " arugments are invalid"); 426 } else if (err == -EBUSY) { 427 throw new RuntimeException("Camera initialization failed because the camera" 428 + " device was already opened"); 429 } else if (err == -EUSERS) { 430 throw new RuntimeException("Camera initialization failed because the max" 431 + " number of camera devices were already opened"); 432 } 433 // Should never hit this. 434 throw new RuntimeException("Unknown camera error"); 435 } 436 } 437 438 private int cameraInitVersion(int cameraId, int halVersion) { 439 mShutterCallback = null; 440 mRawImageCallback = null; 441 mJpegCallback = null; 442 mPreviewCallback = null; 443 mPostviewCallback = null; 444 mUsingPreviewAllocation = false; 445 mZoomListener = null; 446 447 Looper looper; 448 if ((looper = Looper.myLooper()) != null) { 449 mEventHandler = new EventHandler(this, looper); 450 } else if ((looper = Looper.getMainLooper()) != null) { 451 mEventHandler = new EventHandler(this, looper); 452 } else { 453 mEventHandler = null; 454 } 455 456 return native_setup(new WeakReference<Camera>(this), cameraId, halVersion, 457 ActivityThread.currentOpPackageName()); 458 } 459 460 private int cameraInitNormal(int cameraId) { 461 return cameraInitVersion(cameraId, CAMERA_HAL_API_VERSION_NORMAL_CONNECT); 462 } 463 464 /** 465 * Connect to the camera service using #connectLegacy 466 * 467 * <p> 468 * This acts the same as normal except that it will return 469 * the detailed error code if open fails instead of 470 * converting everything into {@code NO_INIT}.</p> 471 * 472 * <p>Intended to use by the camera2 shim only, do <i>not</i> use this for other code.</p> 473 * 474 * @return a detailed errno error code, or {@code NO_ERROR} on success 475 * 476 * @hide 477 */ 478 public int cameraInitUnspecified(int cameraId) { 479 return cameraInitVersion(cameraId, CAMERA_HAL_API_VERSION_UNSPECIFIED); 480 } 481 482 /** used by Camera#open, Camera#open(int) */ 483 Camera(int cameraId) { 484 int err = cameraInitNormal(cameraId); 485 if (checkInitErrors(err)) { 486 if (err == -EACCES) { 487 throw new RuntimeException("Fail to connect to camera service"); 488 } else if (err == -ENODEV) { 489 throw new RuntimeException("Camera initialization failed"); 490 } 491 // Should never hit this. 492 throw new RuntimeException("Unknown camera error"); 493 } 494 } 495 496 497 /** 498 * @hide 499 */ 500 public static boolean checkInitErrors(int err) { 501 return err != NO_ERROR; 502 } 503 504 /** 505 * @hide 506 */ 507 public static Camera openUninitialized() { 508 return new Camera(); 509 } 510 511 /** 512 * An empty Camera for testing purpose. 513 */ 514 Camera() { 515 } 516 517 @Override 518 protected void finalize() { 519 release(); 520 } 521 522 private native final int native_setup(Object camera_this, int cameraId, int halVersion, 523 String packageName); 524 525 private native final void native_release(); 526 527 528 /** 529 * Disconnects and releases the Camera object resources. 530 * 531 * <p>You must call this as soon as you're done with the Camera object.</p> 532 */ 533 public final void release() { 534 native_release(); 535 mFaceDetectionRunning = false; 536 } 537 538 /** 539 * Unlocks the camera to allow another process to access it. 540 * Normally, the camera is locked to the process with an active Camera 541 * object until {@link #release()} is called. To allow rapid handoff 542 * between processes, you can call this method to release the camera 543 * temporarily for another process to use; once the other process is done 544 * you can call {@link #reconnect()} to reclaim the camera. 545 * 546 * <p>This must be done before calling 547 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 548 * called after recording starts. 549 * 550 * <p>If you are not recording video, you probably do not need this method. 551 * 552 * @throws RuntimeException if the camera cannot be unlocked. 553 */ 554 public native final void unlock(); 555 556 /** 557 * Re-locks the camera to prevent other processes from accessing it. 558 * Camera objects are locked by default unless {@link #unlock()} is 559 * called. Normally {@link #reconnect()} is used instead. 560 * 561 * <p>Since API level 14, camera is automatically locked for applications in 562 * {@link android.media.MediaRecorder#start()}. Applications can use the 563 * camera (ex: zoom) after recording starts. There is no need to call this 564 * after recording starts or stops. 565 * 566 * <p>If you are not recording video, you probably do not need this method. 567 * 568 * @throws RuntimeException if the camera cannot be re-locked (for 569 * example, if the camera is still in use by another process). 570 */ 571 public native final void lock(); 572 573 /** 574 * Reconnects to the camera service after another process used it. 575 * After {@link #unlock()} is called, another process may use the 576 * camera; when the process is done, you must reconnect to the camera, 577 * which will re-acquire the lock and allow you to continue using the 578 * camera. 579 * 580 * <p>Since API level 14, camera is automatically locked for applications in 581 * {@link android.media.MediaRecorder#start()}. Applications can use the 582 * camera (ex: zoom) after recording starts. There is no need to call this 583 * after recording starts or stops. 584 * 585 * <p>If you are not recording video, you probably do not need this method. 586 * 587 * @throws IOException if a connection cannot be re-established (for 588 * example, if the camera is still in use by another process). 589 */ 590 public native final void reconnect() throws IOException; 591 592 /** 593 * Sets the {@link Surface} to be used for live preview. 594 * Either a surface or surface texture is necessary for preview, and 595 * preview is necessary to take pictures. The same surface can be re-set 596 * without harm. Setting a preview surface will un-set any preview surface 597 * texture that was set via {@link #setPreviewTexture}. 598 * 599 * <p>The {@link SurfaceHolder} must already contain a surface when this 600 * method is called. If you are using {@link android.view.SurfaceView}, 601 * you will need to register a {@link SurfaceHolder.Callback} with 602 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 603 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 604 * calling setPreviewDisplay() or starting preview. 605 * 606 * <p>This method must be called before {@link #startPreview()}. The 607 * one exception is that if the preview surface is not set (or set to null) 608 * before startPreview() is called, then this method may be called once 609 * with a non-null parameter to set the preview surface. (This allows 610 * camera setup and surface creation to happen in parallel, saving time.) 611 * The preview surface may not otherwise change while preview is running. 612 * 613 * @param holder containing the Surface on which to place the preview, 614 * or null to remove the preview surface 615 * @throws IOException if the method fails (for example, if the surface 616 * is unavailable or unsuitable). 617 */ 618 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 619 if (holder != null) { 620 setPreviewSurface(holder.getSurface()); 621 } else { 622 setPreviewSurface((Surface)null); 623 } 624 } 625 626 /** 627 * @hide 628 */ 629 public native final void setPreviewSurface(Surface surface) throws IOException; 630 631 /** 632 * Sets the {@link SurfaceTexture} to be used for live preview. 633 * Either a surface or surface texture is necessary for preview, and 634 * preview is necessary to take pictures. The same surface texture can be 635 * re-set without harm. Setting a preview surface texture will un-set any 636 * preview surface that was set via {@link #setPreviewDisplay}. 637 * 638 * <p>This method must be called before {@link #startPreview()}. The 639 * one exception is that if the preview surface texture is not set (or set 640 * to null) before startPreview() is called, then this method may be called 641 * once with a non-null parameter to set the preview surface. (This allows 642 * camera setup and surface creation to happen in parallel, saving time.) 643 * The preview surface texture may not otherwise change while preview is 644 * running. 645 * 646 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 647 * SurfaceTexture set as the preview texture have an unspecified zero point, 648 * and cannot be directly compared between different cameras or different 649 * instances of the same camera, or across multiple runs of the same 650 * program. 651 * 652 * <p>If you are using the preview data to create video or still images, 653 * strongly consider using {@link android.media.MediaActionSound} to 654 * properly indicate image capture or recording start/stop to the user.</p> 655 * 656 * @see android.media.MediaActionSound 657 * @see android.graphics.SurfaceTexture 658 * @see android.view.TextureView 659 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 660 * images are to be sent or null to remove the current preview surface 661 * texture 662 * @throws IOException if the method fails (for example, if the surface 663 * texture is unavailable or unsuitable). 664 */ 665 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 666 667 /** 668 * Callback interface used to deliver copies of preview frames as 669 * they are displayed. 670 * 671 * @see #setPreviewCallback(Camera.PreviewCallback) 672 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 673 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 674 * @see #startPreview() 675 * 676 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 677 * applications. 678 */ 679 @Deprecated 680 public interface PreviewCallback 681 { 682 /** 683 * Called as preview frames are displayed. This callback is invoked 684 * on the event thread {@link #open(int)} was called from. 685 * 686 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, 687 * refer to the equations in {@link Camera.Parameters#setPreviewFormat} 688 * for the arrangement of the pixel data in the preview callback 689 * buffers. 690 * 691 * @param data the contents of the preview frame in the format defined 692 * by {@link android.graphics.ImageFormat}, which can be queried 693 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 694 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 695 * is never called, the default will be the YCbCr_420_SP 696 * (NV21) format. 697 * @param camera the Camera service object. 698 */ 699 void onPreviewFrame(byte[] data, Camera camera); 700 }; 701 702 /** 703 * Starts capturing and drawing preview frames to the screen. 704 * Preview will not actually start until a surface is supplied 705 * with {@link #setPreviewDisplay(SurfaceHolder)} or 706 * {@link #setPreviewTexture(SurfaceTexture)}. 707 * 708 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 709 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 710 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 711 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 712 * will be called when preview data becomes available. 713 */ 714 public native final void startPreview(); 715 716 /** 717 * Stops capturing and drawing preview frames to the surface, and 718 * resets the camera for a future call to {@link #startPreview()}. 719 */ 720 public final void stopPreview() { 721 _stopPreview(); 722 mFaceDetectionRunning = false; 723 724 mShutterCallback = null; 725 mRawImageCallback = null; 726 mPostviewCallback = null; 727 mJpegCallback = null; 728 synchronized (mAutoFocusCallbackLock) { 729 mAutoFocusCallback = null; 730 } 731 mAutoFocusMoveCallback = null; 732 } 733 734 private native final void _stopPreview(); 735 736 /** 737 * Return current preview state. 738 * 739 * FIXME: Unhide before release 740 * @hide 741 */ 742 public native final boolean previewEnabled(); 743 744 /** 745 * <p>Installs a callback to be invoked for every preview frame in addition 746 * to displaying them on the screen. The callback will be repeatedly called 747 * for as long as preview is active. This method can be called at any time, 748 * even while preview is live. Any other preview callbacks are 749 * overridden.</p> 750 * 751 * <p>If you are using the preview data to create video or still images, 752 * strongly consider using {@link android.media.MediaActionSound} to 753 * properly indicate image capture or recording start/stop to the user.</p> 754 * 755 * @param cb a callback object that receives a copy of each preview frame, 756 * or null to stop receiving callbacks. 757 * @see android.media.MediaActionSound 758 */ 759 public final void setPreviewCallback(PreviewCallback cb) { 760 mPreviewCallback = cb; 761 mOneShot = false; 762 mWithBuffer = false; 763 if (cb != null) { 764 mUsingPreviewAllocation = false; 765 } 766 // Always use one-shot mode. We fake camera preview mode by 767 // doing one-shot preview continuously. 768 setHasPreviewCallback(cb != null, false); 769 } 770 771 /** 772 * <p>Installs a callback to be invoked for the next preview frame in 773 * addition to displaying it on the screen. After one invocation, the 774 * callback is cleared. This method can be called any time, even when 775 * preview is live. Any other preview callbacks are overridden.</p> 776 * 777 * <p>If you are using the preview data to create video or still images, 778 * strongly consider using {@link android.media.MediaActionSound} to 779 * properly indicate image capture or recording start/stop to the user.</p> 780 * 781 * @param cb a callback object that receives a copy of the next preview frame, 782 * or null to stop receiving callbacks. 783 * @see android.media.MediaActionSound 784 */ 785 public final void setOneShotPreviewCallback(PreviewCallback cb) { 786 mPreviewCallback = cb; 787 mOneShot = true; 788 mWithBuffer = false; 789 if (cb != null) { 790 mUsingPreviewAllocation = false; 791 } 792 setHasPreviewCallback(cb != null, false); 793 } 794 795 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 796 797 /** 798 * <p>Installs a callback to be invoked for every preview frame, using 799 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 800 * displaying them on the screen. The callback will be repeatedly called 801 * for as long as preview is active and buffers are available. Any other 802 * preview callbacks are overridden.</p> 803 * 804 * <p>The purpose of this method is to improve preview efficiency and frame 805 * rate by allowing preview frame memory reuse. You must call 806 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 807 * calling this method -- or no callbacks will received.</p> 808 * 809 * <p>The buffer queue will be cleared if this method is called with a null 810 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 811 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 812 * called.</p> 813 * 814 * <p>If you are using the preview data to create video or still images, 815 * strongly consider using {@link android.media.MediaActionSound} to 816 * properly indicate image capture or recording start/stop to the user.</p> 817 * 818 * @param cb a callback object that receives a copy of the preview frame, 819 * or null to stop receiving callbacks and clear the buffer queue. 820 * @see #addCallbackBuffer(byte[]) 821 * @see android.media.MediaActionSound 822 */ 823 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 824 mPreviewCallback = cb; 825 mOneShot = false; 826 mWithBuffer = true; 827 if (cb != null) { 828 mUsingPreviewAllocation = false; 829 } 830 setHasPreviewCallback(cb != null, true); 831 } 832 833 /** 834 * Adds a pre-allocated buffer to the preview callback buffer queue. 835 * Applications can add one or more buffers to the queue. When a preview 836 * frame arrives and there is still at least one available buffer, the 837 * buffer will be used and removed from the queue. Then preview callback is 838 * invoked with the buffer. If a frame arrives and there is no buffer left, 839 * the frame is discarded. Applications should add buffers back when they 840 * finish processing the data in them. 841 * 842 * <p>For formats besides YV12, the size of the buffer is determined by 843 * multiplying the preview image width, height, and bytes per pixel. The 844 * width and height can be read from 845 * {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel can be 846 * computed from {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 847 * 8, using the image format from 848 * {@link Camera.Parameters#getPreviewFormat()}. 849 * 850 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, the 851 * size can be calculated using the equations listed in 852 * {@link Camera.Parameters#setPreviewFormat}. 853 * 854 * <p>This method is only necessary when 855 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 856 * {@link #setPreviewCallback(PreviewCallback)} or 857 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 858 * are automatically allocated. When a supplied buffer is too small to 859 * hold the preview frame data, preview callback will return null and 860 * the buffer will be removed from the buffer queue. 861 * 862 * @param callbackBuffer the buffer to add to the queue. The size of the 863 * buffer must match the values described above. 864 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 865 */ 866 public final void addCallbackBuffer(byte[] callbackBuffer) 867 { 868 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 869 } 870 871 /** 872 * Adds a pre-allocated buffer to the raw image callback buffer queue. 873 * Applications can add one or more buffers to the queue. When a raw image 874 * frame arrives and there is still at least one available buffer, the 875 * buffer will be used to hold the raw image data and removed from the 876 * queue. Then raw image callback is invoked with the buffer. If a raw 877 * image frame arrives but there is no buffer left, the frame is 878 * discarded. Applications should add buffers back when they finish 879 * processing the data in them by calling this method again in order 880 * to avoid running out of raw image callback buffers. 881 * 882 * <p>The size of the buffer is determined by multiplying the raw image 883 * width, height, and bytes per pixel. The width and height can be 884 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 885 * can be computed from 886 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 887 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 888 * 889 * <p>This method is only necessary when the PictureCallbck for raw image 890 * is used while calling {@link #takePicture(Camera.ShutterCallback, 891 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 892 * 893 * <p>Please note that by calling this method, the mode for 894 * application-managed callback buffers is triggered. If this method has 895 * never been called, null will be returned by the raw image callback since 896 * there is no image callback buffer available. Furthermore, When a supplied 897 * buffer is too small to hold the raw image data, raw image callback will 898 * return null and the buffer will be removed from the buffer queue. 899 * 900 * @param callbackBuffer the buffer to add to the raw image callback buffer 901 * queue. The size should be width * height * (bits per pixel) / 8. An 902 * null callbackBuffer will be ignored and won't be added to the queue. 903 * 904 * @see #takePicture(Camera.ShutterCallback, 905 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 906 * 907 * {@hide} 908 */ 909 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 910 { 911 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 912 } 913 914 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 915 { 916 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 917 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 918 msgType != CAMERA_MSG_RAW_IMAGE) { 919 throw new IllegalArgumentException( 920 "Unsupported message type: " + msgType); 921 } 922 923 _addCallbackBuffer(callbackBuffer, msgType); 924 } 925 926 private native final void _addCallbackBuffer( 927 byte[] callbackBuffer, int msgType); 928 929 /** 930 * <p>Create a {@link android.renderscript RenderScript} 931 * {@link android.renderscript.Allocation Allocation} to use as a 932 * destination of preview callback frames. Use 933 * {@link #setPreviewCallbackAllocation setPreviewCallbackAllocation} to use 934 * the created Allocation as a destination for camera preview frames.</p> 935 * 936 * <p>The Allocation will be created with a YUV type, and its contents must 937 * be accessed within Renderscript with the {@code rsGetElementAtYuv_*} 938 * accessor methods. Its size will be based on the current 939 * {@link Parameters#getPreviewSize preview size} configured for this 940 * camera.</p> 941 * 942 * @param rs the RenderScript context for this Allocation. 943 * @param usage additional usage flags to set for the Allocation. The usage 944 * flag {@link android.renderscript.Allocation#USAGE_IO_INPUT} will always 945 * be set on the created Allocation, but additional flags may be provided 946 * here. 947 * @return a new YUV-type Allocation with dimensions equal to the current 948 * preview size. 949 * @throws RSIllegalArgumentException if the usage flags are not compatible 950 * with an YUV Allocation. 951 * @see #setPreviewCallbackAllocation 952 * @hide 953 */ 954 public final Allocation createPreviewAllocation(RenderScript rs, int usage) 955 throws RSIllegalArgumentException { 956 Parameters p = getParameters(); 957 Size previewSize = p.getPreviewSize(); 958 Type.Builder yuvBuilder = new Type.Builder(rs, 959 Element.createPixel(rs, 960 Element.DataType.UNSIGNED_8, 961 Element.DataKind.PIXEL_YUV)); 962 // Use YV12 for wide compatibility. Changing this requires also 963 // adjusting camera service's format selection. 964 yuvBuilder.setYuvFormat(ImageFormat.YV12); 965 yuvBuilder.setX(previewSize.width); 966 yuvBuilder.setY(previewSize.height); 967 968 Allocation a = Allocation.createTyped(rs, yuvBuilder.create(), 969 usage | Allocation.USAGE_IO_INPUT); 970 971 return a; 972 } 973 974 /** 975 * <p>Set an {@link android.renderscript.Allocation Allocation} as the 976 * target of preview callback data. Use this method for efficient processing 977 * of camera preview data with RenderScript. The Allocation must be created 978 * with the {@link #createPreviewAllocation createPreviewAllocation } 979 * method.</p> 980 * 981 * <p>Setting a preview allocation will disable any active preview callbacks 982 * set by {@link #setPreviewCallback setPreviewCallback} or 983 * {@link #setPreviewCallbackWithBuffer setPreviewCallbackWithBuffer}, and 984 * vice versa. Using a preview allocation still requires an active standard 985 * preview target to be set, either with 986 * {@link #setPreviewTexture setPreviewTexture} or 987 * {@link #setPreviewDisplay setPreviewDisplay}.</p> 988 * 989 * <p>To be notified when new frames are available to the Allocation, use 990 * {@link android.renderscript.Allocation#setIoInputNotificationHandler Allocation.setIoInputNotificationHandler}. To 991 * update the frame currently accessible from the Allocation to the latest 992 * preview frame, call 993 * {@link android.renderscript.Allocation#ioReceive Allocation.ioReceive}.</p> 994 * 995 * <p>To disable preview into the Allocation, call this method with a 996 * {@code null} parameter.</p> 997 * 998 * <p>Once a preview allocation is set, the preview size set by 999 * {@link Parameters#setPreviewSize setPreviewSize} cannot be changed. If 1000 * you wish to change the preview size, first remove the preview allocation 1001 * by calling {@code setPreviewCallbackAllocation(null)}, then change the 1002 * preview size, create a new preview Allocation with 1003 * {@link #createPreviewAllocation createPreviewAllocation}, and set it as 1004 * the new preview callback allocation target.</p> 1005 * 1006 * <p>If you are using the preview data to create video or still images, 1007 * strongly consider using {@link android.media.MediaActionSound} to 1008 * properly indicate image capture or recording start/stop to the user.</p> 1009 * 1010 * @param previewAllocation the allocation to use as destination for preview 1011 * @throws IOException if configuring the camera to use the Allocation for 1012 * preview fails. 1013 * @throws IllegalArgumentException if the Allocation's dimensions or other 1014 * parameters don't meet the requirements. 1015 * @see #createPreviewAllocation 1016 * @see #setPreviewCallback 1017 * @see #setPreviewCallbackWithBuffer 1018 * @hide 1019 */ 1020 public final void setPreviewCallbackAllocation(Allocation previewAllocation) 1021 throws IOException { 1022 Surface previewSurface = null; 1023 if (previewAllocation != null) { 1024 Parameters p = getParameters(); 1025 Size previewSize = p.getPreviewSize(); 1026 if (previewSize.width != previewAllocation.getType().getX() || 1027 previewSize.height != previewAllocation.getType().getY()) { 1028 throw new IllegalArgumentException( 1029 "Allocation dimensions don't match preview dimensions: " + 1030 "Allocation is " + 1031 previewAllocation.getType().getX() + 1032 ", " + 1033 previewAllocation.getType().getY() + 1034 ". Preview is " + previewSize.width + ", " + 1035 previewSize.height); 1036 } 1037 if ((previewAllocation.getUsage() & 1038 Allocation.USAGE_IO_INPUT) == 0) { 1039 throw new IllegalArgumentException( 1040 "Allocation usage does not include USAGE_IO_INPUT"); 1041 } 1042 if (previewAllocation.getType().getElement().getDataKind() != 1043 Element.DataKind.PIXEL_YUV) { 1044 throw new IllegalArgumentException( 1045 "Allocation is not of a YUV type"); 1046 } 1047 previewSurface = previewAllocation.getSurface(); 1048 mUsingPreviewAllocation = true; 1049 } else { 1050 mUsingPreviewAllocation = false; 1051 } 1052 setPreviewCallbackSurface(previewSurface); 1053 } 1054 1055 private native final void setPreviewCallbackSurface(Surface s); 1056 1057 private class EventHandler extends Handler 1058 { 1059 private final Camera mCamera; 1060 1061 public EventHandler(Camera c, Looper looper) { 1062 super(looper); 1063 mCamera = c; 1064 } 1065 1066 @Override 1067 public void handleMessage(Message msg) { 1068 switch(msg.what) { 1069 case CAMERA_MSG_SHUTTER: 1070 if (mShutterCallback != null) { 1071 mShutterCallback.onShutter(); 1072 } 1073 return; 1074 1075 case CAMERA_MSG_RAW_IMAGE: 1076 if (mRawImageCallback != null) { 1077 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 1078 } 1079 return; 1080 1081 case CAMERA_MSG_COMPRESSED_IMAGE: 1082 if (mJpegCallback != null) { 1083 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 1084 } 1085 return; 1086 1087 case CAMERA_MSG_PREVIEW_FRAME: 1088 PreviewCallback pCb = mPreviewCallback; 1089 if (pCb != null) { 1090 if (mOneShot) { 1091 // Clear the callback variable before the callback 1092 // in case the app calls setPreviewCallback from 1093 // the callback function 1094 mPreviewCallback = null; 1095 } else if (!mWithBuffer) { 1096 // We're faking the camera preview mode to prevent 1097 // the app from being flooded with preview frames. 1098 // Set to oneshot mode again. 1099 setHasPreviewCallback(true, false); 1100 } 1101 pCb.onPreviewFrame((byte[])msg.obj, mCamera); 1102 } 1103 return; 1104 1105 case CAMERA_MSG_POSTVIEW_FRAME: 1106 if (mPostviewCallback != null) { 1107 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 1108 } 1109 return; 1110 1111 case CAMERA_MSG_FOCUS: 1112 AutoFocusCallback cb = null; 1113 synchronized (mAutoFocusCallbackLock) { 1114 cb = mAutoFocusCallback; 1115 } 1116 if (cb != null) { 1117 boolean success = msg.arg1 == 0 ? false : true; 1118 cb.onAutoFocus(success, mCamera); 1119 } 1120 return; 1121 1122 case CAMERA_MSG_ZOOM: 1123 if (mZoomListener != null) { 1124 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 1125 } 1126 return; 1127 1128 case CAMERA_MSG_PREVIEW_METADATA: 1129 if (mFaceListener != null) { 1130 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 1131 } 1132 return; 1133 1134 case CAMERA_MSG_ERROR : 1135 Log.e(TAG, "Error " + msg.arg1); 1136 if (mErrorCallback != null) { 1137 mErrorCallback.onError(msg.arg1, mCamera); 1138 } 1139 return; 1140 1141 case CAMERA_MSG_FOCUS_MOVE: 1142 if (mAutoFocusMoveCallback != null) { 1143 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 1144 } 1145 return; 1146 1147 default: 1148 Log.e(TAG, "Unknown message type " + msg.what); 1149 return; 1150 } 1151 } 1152 } 1153 1154 private static void postEventFromNative(Object camera_ref, 1155 int what, int arg1, int arg2, Object obj) 1156 { 1157 Camera c = (Camera)((WeakReference)camera_ref).get(); 1158 if (c == null) 1159 return; 1160 1161 if (c.mEventHandler != null) { 1162 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 1163 c.mEventHandler.sendMessage(m); 1164 } 1165 } 1166 1167 /** 1168 * Callback interface used to notify on completion of camera auto focus. 1169 * 1170 * <p>Devices that do not support auto-focus will receive a "fake" 1171 * callback to this interface. If your application needs auto-focus and 1172 * should not be installed on devices <em>without</em> auto-focus, you must 1173 * declare that your app uses the 1174 * {@code android.hardware.camera.autofocus} feature, in the 1175 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1176 * manifest element.</p> 1177 * 1178 * @see #autoFocus(AutoFocusCallback) 1179 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1180 * applications. 1181 */ 1182 @Deprecated 1183 public interface AutoFocusCallback 1184 { 1185 /** 1186 * Called when the camera auto focus completes. If the camera 1187 * does not support auto-focus and autoFocus is called, 1188 * onAutoFocus will be called immediately with a fake value of 1189 * <code>success</code> set to <code>true</code>. 1190 * 1191 * The auto-focus routine does not lock auto-exposure and auto-white 1192 * balance after it completes. 1193 * 1194 * @param success true if focus was successful, false if otherwise 1195 * @param camera the Camera service object 1196 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1197 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1198 */ 1199 void onAutoFocus(boolean success, Camera camera); 1200 } 1201 1202 /** 1203 * Starts camera auto-focus and registers a callback function to run when 1204 * the camera is focused. This method is only valid when preview is active 1205 * (between {@link #startPreview()} and before {@link #stopPreview()}). 1206 * 1207 * <p>Callers should check 1208 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 1209 * this method should be called. If the camera does not support auto-focus, 1210 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 1211 * callback will be called immediately. 1212 * 1213 * <p>If your application should not be installed 1214 * on devices without auto-focus, you must declare that your application 1215 * uses auto-focus with the 1216 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1217 * manifest element.</p> 1218 * 1219 * <p>If the current flash mode is not 1220 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 1221 * fired during auto-focus, depending on the driver and camera hardware.<p> 1222 * 1223 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 1224 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 1225 * do not change during and after autofocus. But auto-focus routine may stop 1226 * auto-exposure and auto-white balance transiently during focusing. 1227 * 1228 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 1229 * image capture with {@link #takePicture(Camera.ShutterCallback, 1230 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 1231 * the focus position. Applications must call cancelAutoFocus to reset the 1232 * focus.</p> 1233 * 1234 * <p>If autofocus is successful, consider using 1235 * {@link android.media.MediaActionSound} to properly play back an autofocus 1236 * success sound to the user.</p> 1237 * 1238 * @param cb the callback to run 1239 * @see #cancelAutoFocus() 1240 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1241 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1242 * @see android.media.MediaActionSound 1243 */ 1244 public final void autoFocus(AutoFocusCallback cb) 1245 { 1246 synchronized (mAutoFocusCallbackLock) { 1247 mAutoFocusCallback = cb; 1248 } 1249 native_autoFocus(); 1250 } 1251 private native final void native_autoFocus(); 1252 1253 /** 1254 * Cancels any auto-focus function in progress. 1255 * Whether or not auto-focus is currently in progress, 1256 * this function will return the focus position to the default. 1257 * If the camera does not support auto-focus, this is a no-op. 1258 * 1259 * @see #autoFocus(Camera.AutoFocusCallback) 1260 */ 1261 public final void cancelAutoFocus() 1262 { 1263 synchronized (mAutoFocusCallbackLock) { 1264 mAutoFocusCallback = null; 1265 } 1266 native_cancelAutoFocus(); 1267 // CAMERA_MSG_FOCUS should be removed here because the following 1268 // scenario can happen: 1269 // - An application uses the same thread for autoFocus, cancelAutoFocus 1270 // and looper thread. 1271 // - The application calls autoFocus. 1272 // - HAL sends CAMERA_MSG_FOCUS, which enters the looper message queue. 1273 // Before event handler's handleMessage() is invoked, the application 1274 // calls cancelAutoFocus and autoFocus. 1275 // - The application gets the old CAMERA_MSG_FOCUS and thinks autofocus 1276 // has been completed. But in fact it is not. 1277 // 1278 // As documented in the beginning of the file, apps should not use 1279 // multiple threads to call autoFocus and cancelAutoFocus at the same 1280 // time. It is HAL's responsibility not to send a CAMERA_MSG_FOCUS 1281 // message after native_cancelAutoFocus is called. 1282 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 1283 } 1284 private native final void native_cancelAutoFocus(); 1285 1286 /** 1287 * Callback interface used to notify on auto focus start and stop. 1288 * 1289 * <p>This is only supported in continuous autofocus modes -- {@link 1290 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 1291 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 1292 * autofocus animation based on this.</p> 1293 * 1294 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1295 * applications. 1296 */ 1297 @Deprecated 1298 public interface AutoFocusMoveCallback 1299 { 1300 /** 1301 * Called when the camera auto focus starts or stops. 1302 * 1303 * @param start true if focus starts to move, false if focus stops to move 1304 * @param camera the Camera service object 1305 */ 1306 void onAutoFocusMoving(boolean start, Camera camera); 1307 } 1308 1309 /** 1310 * Sets camera auto-focus move callback. 1311 * 1312 * @param cb the callback to run 1313 */ 1314 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 1315 mAutoFocusMoveCallback = cb; 1316 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 1317 } 1318 1319 private native void enableFocusMoveCallback(int enable); 1320 1321 /** 1322 * Callback interface used to signal the moment of actual image capture. 1323 * 1324 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1325 * 1326 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1327 * applications. 1328 */ 1329 @Deprecated 1330 public interface ShutterCallback 1331 { 1332 /** 1333 * Called as near as possible to the moment when a photo is captured 1334 * from the sensor. This is a good opportunity to play a shutter sound 1335 * or give other feedback of camera operation. This may be some time 1336 * after the photo was triggered, but some time before the actual data 1337 * is available. 1338 */ 1339 void onShutter(); 1340 } 1341 1342 /** 1343 * Callback interface used to supply image data from a photo capture. 1344 * 1345 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1346 * 1347 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1348 * applications. 1349 */ 1350 @Deprecated 1351 public interface PictureCallback { 1352 /** 1353 * Called when image data is available after a picture is taken. 1354 * The format of the data depends on the context of the callback 1355 * and {@link Camera.Parameters} settings. 1356 * 1357 * @param data a byte array of the picture data 1358 * @param camera the Camera service object 1359 */ 1360 void onPictureTaken(byte[] data, Camera camera); 1361 }; 1362 1363 /** 1364 * Equivalent to takePicture(shutter, raw, null, jpeg). 1365 * 1366 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1367 */ 1368 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1369 PictureCallback jpeg) { 1370 takePicture(shutter, raw, null, jpeg); 1371 } 1372 private native final void native_takePicture(int msgType); 1373 1374 /** 1375 * Triggers an asynchronous image capture. The camera service will initiate 1376 * a series of callbacks to the application as the image capture progresses. 1377 * The shutter callback occurs after the image is captured. This can be used 1378 * to trigger a sound to let the user know that image has been captured. The 1379 * raw callback occurs when the raw image data is available (NOTE: the data 1380 * will be null if there is no raw image callback buffer available or the 1381 * raw image callback buffer is not large enough to hold the raw image). 1382 * The postview callback occurs when a scaled, fully processed postview 1383 * image is available (NOTE: not all hardware supports this). The jpeg 1384 * callback occurs when the compressed image is available. If the 1385 * application does not need a particular callback, a null can be passed 1386 * instead of a callback method. 1387 * 1388 * <p>This method is only valid when preview is active (after 1389 * {@link #startPreview()}). Preview will be stopped after the image is 1390 * taken; callers must call {@link #startPreview()} again if they want to 1391 * re-start preview or take more pictures. This should not be called between 1392 * {@link android.media.MediaRecorder#start()} and 1393 * {@link android.media.MediaRecorder#stop()}. 1394 * 1395 * <p>After calling this method, you must not call {@link #startPreview()} 1396 * or take another picture until the JPEG callback has returned. 1397 * 1398 * @param shutter the callback for image capture moment, or null 1399 * @param raw the callback for raw (uncompressed) image data, or null 1400 * @param postview callback with postview image data, may be null 1401 * @param jpeg the callback for JPEG image data, or null 1402 */ 1403 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1404 PictureCallback postview, PictureCallback jpeg) { 1405 mShutterCallback = shutter; 1406 mRawImageCallback = raw; 1407 mPostviewCallback = postview; 1408 mJpegCallback = jpeg; 1409 1410 // If callback is not set, do not send me callbacks. 1411 int msgType = 0; 1412 if (mShutterCallback != null) { 1413 msgType |= CAMERA_MSG_SHUTTER; 1414 } 1415 if (mRawImageCallback != null) { 1416 msgType |= CAMERA_MSG_RAW_IMAGE; 1417 } 1418 if (mPostviewCallback != null) { 1419 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1420 } 1421 if (mJpegCallback != null) { 1422 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1423 } 1424 1425 native_takePicture(msgType); 1426 mFaceDetectionRunning = false; 1427 } 1428 1429 /** 1430 * Zooms to the requested value smoothly. The driver will notify {@link 1431 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1432 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1433 * is called with value 3. The 1434 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1435 * method will be called three times with zoom values 1, 2, and 3. 1436 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1437 * Applications should not call startSmoothZoom again or change the zoom 1438 * value before zoom stops. If the supplied zoom value equals to the current 1439 * zoom value, no zoom callback will be generated. This method is supported 1440 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1441 * returns true. 1442 * 1443 * @param value zoom value. The valid range is 0 to {@link 1444 * android.hardware.Camera.Parameters#getMaxZoom}. 1445 * @throws IllegalArgumentException if the zoom value is invalid. 1446 * @throws RuntimeException if the method fails. 1447 * @see #setZoomChangeListener(OnZoomChangeListener) 1448 */ 1449 public native final void startSmoothZoom(int value); 1450 1451 /** 1452 * Stops the smooth zoom. Applications should wait for the {@link 1453 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1454 * method is supported if {@link 1455 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1456 * 1457 * @throws RuntimeException if the method fails. 1458 */ 1459 public native final void stopSmoothZoom(); 1460 1461 /** 1462 * Set the clockwise rotation of preview display in degrees. This affects 1463 * the preview frames and the picture displayed after snapshot. This method 1464 * is useful for portrait mode applications. Note that preview display of 1465 * front-facing cameras is flipped horizontally before the rotation, that 1466 * is, the image is reflected along the central vertical axis of the camera 1467 * sensor. So the users can see themselves as looking into a mirror. 1468 * 1469 * <p>This does not affect the order of byte array passed in {@link 1470 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1471 * method is not allowed to be called during preview. 1472 * 1473 * <p>If you want to make the camera image show in the same orientation as 1474 * the display, you can use the following code. 1475 * <pre> 1476 * public static void setCameraDisplayOrientation(Activity activity, 1477 * int cameraId, android.hardware.Camera camera) { 1478 * android.hardware.Camera.CameraInfo info = 1479 * new android.hardware.Camera.CameraInfo(); 1480 * android.hardware.Camera.getCameraInfo(cameraId, info); 1481 * int rotation = activity.getWindowManager().getDefaultDisplay() 1482 * .getRotation(); 1483 * int degrees = 0; 1484 * switch (rotation) { 1485 * case Surface.ROTATION_0: degrees = 0; break; 1486 * case Surface.ROTATION_90: degrees = 90; break; 1487 * case Surface.ROTATION_180: degrees = 180; break; 1488 * case Surface.ROTATION_270: degrees = 270; break; 1489 * } 1490 * 1491 * int result; 1492 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1493 * result = (info.orientation + degrees) % 360; 1494 * result = (360 - result) % 360; // compensate the mirror 1495 * } else { // back-facing 1496 * result = (info.orientation - degrees + 360) % 360; 1497 * } 1498 * camera.setDisplayOrientation(result); 1499 * } 1500 * </pre> 1501 * 1502 * <p>Starting from API level 14, this method can be called when preview is 1503 * active. 1504 * 1505 * @param degrees the angle that the picture will be rotated clockwise. 1506 * Valid values are 0, 90, 180, and 270. The starting 1507 * position is 0 (landscape). 1508 * @see #setPreviewDisplay(SurfaceHolder) 1509 */ 1510 public native final void setDisplayOrientation(int degrees); 1511 1512 /** 1513 * <p>Enable or disable the default shutter sound when taking a picture.</p> 1514 * 1515 * <p>By default, the camera plays the system-defined camera shutter sound 1516 * when {@link #takePicture} is called. Using this method, the shutter sound 1517 * can be disabled. It is strongly recommended that an alternative shutter 1518 * sound is played in the {@link ShutterCallback} when the system shutter 1519 * sound is disabled.</p> 1520 * 1521 * <p>Note that devices may not always allow disabling the camera shutter 1522 * sound. If the shutter sound state cannot be set to the desired value, 1523 * this method will return false. {@link CameraInfo#canDisableShutterSound} 1524 * can be used to determine whether the device will allow the shutter sound 1525 * to be disabled.</p> 1526 * 1527 * @param enabled whether the camera should play the system shutter sound 1528 * when {@link #takePicture takePicture} is called. 1529 * @return {@code true} if the shutter sound state was successfully 1530 * changed. {@code false} if the shutter sound state could not be 1531 * changed. {@code true} is also returned if shutter sound playback 1532 * is already set to the requested state. 1533 * @see #takePicture 1534 * @see CameraInfo#canDisableShutterSound 1535 * @see ShutterCallback 1536 */ 1537 public final boolean enableShutterSound(boolean enabled) { 1538 if (!enabled) { 1539 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 1540 IAudioService audioService = IAudioService.Stub.asInterface(b); 1541 try { 1542 if (audioService.isCameraSoundForced()) return false; 1543 } catch (RemoteException e) { 1544 Log.e(TAG, "Audio service is unavailable for queries"); 1545 } 1546 } 1547 return _enableShutterSound(enabled); 1548 } 1549 1550 /** 1551 * Disable the shutter sound unconditionally. 1552 * 1553 * <p> 1554 * This is only guaranteed to work for legacy cameras 1555 * (i.e. initialized with {@link #cameraInitUnspecified}). Trying to call this on 1556 * a regular camera will force a conditional check in the camera service. 1557 * </p> 1558 * 1559 * @return {@code true} if the shutter sound state was successfully 1560 * changed. {@code false} if the shutter sound state could not be 1561 * changed. {@code true} is also returned if shutter sound playback 1562 * is already set to the requested state. 1563 * 1564 * @hide 1565 */ 1566 public final boolean disableShutterSound() { 1567 return _enableShutterSound(/*enabled*/false); 1568 } 1569 1570 private native final boolean _enableShutterSound(boolean enabled); 1571 1572 /** 1573 * Callback interface for zoom changes during a smooth zoom operation. 1574 * 1575 * @see #setZoomChangeListener(OnZoomChangeListener) 1576 * @see #startSmoothZoom(int) 1577 * 1578 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1579 * applications. 1580 */ 1581 @Deprecated 1582 public interface OnZoomChangeListener 1583 { 1584 /** 1585 * Called when the zoom value has changed during a smooth zoom. 1586 * 1587 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1588 * calls this for every new zoom value. 1589 * @param stopped whether smooth zoom is stopped. If the value is true, 1590 * this is the last zoom update for the application. 1591 * @param camera the Camera service object 1592 */ 1593 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1594 }; 1595 1596 /** 1597 * Registers a listener to be notified when the zoom value is updated by the 1598 * camera driver during smooth zoom. 1599 * 1600 * @param listener the listener to notify 1601 * @see #startSmoothZoom(int) 1602 */ 1603 public final void setZoomChangeListener(OnZoomChangeListener listener) 1604 { 1605 mZoomListener = listener; 1606 } 1607 1608 /** 1609 * Callback interface for face detected in the preview frame. 1610 * 1611 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1612 * applications. 1613 */ 1614 @Deprecated 1615 public interface FaceDetectionListener 1616 { 1617 /** 1618 * Notify the listener of the detected faces in the preview frame. 1619 * 1620 * @param faces The detected faces in a list 1621 * @param camera The {@link Camera} service object 1622 */ 1623 void onFaceDetection(Face[] faces, Camera camera); 1624 } 1625 1626 /** 1627 * Registers a listener to be notified about the faces detected in the 1628 * preview frame. 1629 * 1630 * @param listener the listener to notify 1631 * @see #startFaceDetection() 1632 */ 1633 public final void setFaceDetectionListener(FaceDetectionListener listener) 1634 { 1635 mFaceListener = listener; 1636 } 1637 1638 /** 1639 * Starts the face detection. This should be called after preview is started. 1640 * The camera will notify {@link FaceDetectionListener} of the detected 1641 * faces in the preview frame. The detected faces may be the same as the 1642 * previous ones. Applications should call {@link #stopFaceDetection} to 1643 * stop the face detection. This method is supported if {@link 1644 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1645 * If the face detection has started, apps should not call this again. 1646 * 1647 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1648 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1649 * have no effect. The camera uses the detected faces to do auto-white balance, 1650 * auto exposure, and autofocus. 1651 * 1652 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1653 * will stop sending face callbacks. The last face callback indicates the 1654 * areas used to do autofocus. After focus completes, face detection will 1655 * resume sending face callbacks. If the apps call {@link 1656 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1657 * 1658 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1659 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1660 * preview with {@link #startPreview()}, the apps should call this method 1661 * again to resume face detection.</p> 1662 * 1663 * @throws IllegalArgumentException if the face detection is unsupported. 1664 * @throws RuntimeException if the method fails or the face detection is 1665 * already running. 1666 * @see FaceDetectionListener 1667 * @see #stopFaceDetection() 1668 * @see Parameters#getMaxNumDetectedFaces() 1669 */ 1670 public final void startFaceDetection() { 1671 if (mFaceDetectionRunning) { 1672 throw new RuntimeException("Face detection is already running"); 1673 } 1674 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1675 mFaceDetectionRunning = true; 1676 } 1677 1678 /** 1679 * Stops the face detection. 1680 * 1681 * @see #startFaceDetection() 1682 */ 1683 public final void stopFaceDetection() { 1684 _stopFaceDetection(); 1685 mFaceDetectionRunning = false; 1686 } 1687 1688 private native final void _startFaceDetection(int type); 1689 private native final void _stopFaceDetection(); 1690 1691 /** 1692 * Information about a face identified through camera face detection. 1693 * 1694 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1695 * list of face objects for use in focusing and metering.</p> 1696 * 1697 * @see FaceDetectionListener 1698 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1699 * applications. 1700 */ 1701 @Deprecated 1702 public static class Face { 1703 /** 1704 * Create an empty face. 1705 */ 1706 public Face() { 1707 } 1708 1709 /** 1710 * Bounds of the face. (-1000, -1000) represents the top-left of the 1711 * camera field of view, and (1000, 1000) represents the bottom-right of 1712 * the field of view. For example, suppose the size of the viewfinder UI 1713 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1714 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1715 * guaranteed left < right and top < bottom. The coordinates can be 1716 * smaller than -1000 or bigger than 1000. But at least one vertex will 1717 * be within (-1000, -1000) and (1000, 1000). 1718 * 1719 * <p>The direction is relative to the sensor orientation, that is, what 1720 * the sensor sees. The direction is not affected by the rotation or 1721 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1722 * rectangle does not provide any information about face orientation.</p> 1723 * 1724 * <p>Here is the matrix to convert driver coordinates to View coordinates 1725 * in pixels.</p> 1726 * <pre> 1727 * Matrix matrix = new Matrix(); 1728 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1729 * // Need mirror for front camera. 1730 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1731 * matrix.setScale(mirror ? -1 : 1, 1); 1732 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1733 * matrix.postRotate(displayOrientation); 1734 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1735 * // UI coordinates range from (0, 0) to (width, height). 1736 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1737 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1738 * </pre> 1739 * 1740 * @see #startFaceDetection() 1741 */ 1742 public Rect rect; 1743 1744 /** 1745 * <p>The confidence level for the detection of the face. The range is 1 to 1746 * 100. 100 is the highest confidence.</p> 1747 * 1748 * <p>Depending on the device, even very low-confidence faces may be 1749 * listed, so applications should filter out faces with low confidence, 1750 * depending on the use case. For a typical point-and-shoot camera 1751 * application that wishes to display rectangles around detected faces, 1752 * filtering out faces with confidence less than 50 is recommended.</p> 1753 * 1754 * @see #startFaceDetection() 1755 */ 1756 public int score; 1757 1758 /** 1759 * An unique id per face while the face is visible to the tracker. If 1760 * the face leaves the field-of-view and comes back, it will get a new 1761 * id. This is an optional field, may not be supported on all devices. 1762 * If not supported, id will always be set to -1. The optional fields 1763 * are supported as a set. Either they are all valid, or none of them 1764 * are. 1765 */ 1766 public int id = -1; 1767 1768 /** 1769 * The coordinates of the center of the left eye. The coordinates are in 1770 * the same space as the ones for {@link #rect}. This is an optional 1771 * field, may not be supported on all devices. If not supported, the 1772 * value will always be set to null. The optional fields are supported 1773 * as a set. Either they are all valid, or none of them are. 1774 */ 1775 public Point leftEye = null; 1776 1777 /** 1778 * The coordinates of the center of the right eye. The coordinates are 1779 * in the same space as the ones for {@link #rect}.This is an optional 1780 * field, may not be supported on all devices. If not supported, the 1781 * value will always be set to null. The optional fields are supported 1782 * as a set. Either they are all valid, or none of them are. 1783 */ 1784 public Point rightEye = null; 1785 1786 /** 1787 * The coordinates of the center of the mouth. The coordinates are in 1788 * the same space as the ones for {@link #rect}. This is an optional 1789 * field, may not be supported on all devices. If not supported, the 1790 * value will always be set to null. The optional fields are supported 1791 * as a set. Either they are all valid, or none of them are. 1792 */ 1793 public Point mouth = null; 1794 } 1795 1796 /** 1797 * Unspecified camera error. 1798 * @see Camera.ErrorCallback 1799 */ 1800 public static final int CAMERA_ERROR_UNKNOWN = 1; 1801 1802 /** 1803 * Camera was disconnected due to use by higher priority user. 1804 * @see Camera.ErrorCallback 1805 */ 1806 public static final int CAMERA_ERROR_EVICTED = 2; 1807 1808 /** 1809 * Media server died. In this case, the application must release the 1810 * Camera object and instantiate a new one. 1811 * @see Camera.ErrorCallback 1812 */ 1813 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1814 1815 /** 1816 * Callback interface for camera error notification. 1817 * 1818 * @see #setErrorCallback(ErrorCallback) 1819 * 1820 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1821 * applications. 1822 */ 1823 @Deprecated 1824 public interface ErrorCallback 1825 { 1826 /** 1827 * Callback for camera errors. 1828 * @param error error code: 1829 * <ul> 1830 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1831 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1832 * </ul> 1833 * @param camera the Camera service object 1834 */ 1835 void onError(int error, Camera camera); 1836 }; 1837 1838 /** 1839 * Registers a callback to be invoked when an error occurs. 1840 * @param cb The callback to run 1841 */ 1842 public final void setErrorCallback(ErrorCallback cb) 1843 { 1844 mErrorCallback = cb; 1845 } 1846 1847 private native final void native_setParameters(String params); 1848 private native final String native_getParameters(); 1849 1850 /** 1851 * Changes the settings for this Camera service. 1852 * 1853 * @param params the Parameters to use for this Camera service 1854 * @throws RuntimeException if any parameter is invalid or not supported. 1855 * @see #getParameters() 1856 */ 1857 public void setParameters(Parameters params) { 1858 // If using preview allocations, don't allow preview size changes 1859 if (mUsingPreviewAllocation) { 1860 Size newPreviewSize = params.getPreviewSize(); 1861 Size currentPreviewSize = getParameters().getPreviewSize(); 1862 if (newPreviewSize.width != currentPreviewSize.width || 1863 newPreviewSize.height != currentPreviewSize.height) { 1864 throw new IllegalStateException("Cannot change preview size" + 1865 " while a preview allocation is configured."); 1866 } 1867 } 1868 1869 native_setParameters(params.flatten()); 1870 } 1871 1872 /** 1873 * Returns the current settings for this Camera service. 1874 * If modifications are made to the returned Parameters, they must be passed 1875 * to {@link #setParameters(Camera.Parameters)} to take effect. 1876 * 1877 * @see #setParameters(Camera.Parameters) 1878 */ 1879 public Parameters getParameters() { 1880 Parameters p = new Parameters(); 1881 String s = native_getParameters(); 1882 p.unflatten(s); 1883 return p; 1884 } 1885 1886 /** 1887 * Returns an empty {@link Parameters} for testing purpose. 1888 * 1889 * @return a Parameter object. 1890 * 1891 * @hide 1892 */ 1893 public static Parameters getEmptyParameters() { 1894 Camera camera = new Camera(); 1895 return camera.new Parameters(); 1896 } 1897 1898 /** 1899 * Returns a copied {@link Parameters}; for shim use only. 1900 * 1901 * @param parameters a non-{@code null} parameters 1902 * @return a Parameter object, with all the parameters copied from {@code parameters}. 1903 * 1904 * @throws NullPointerException if {@code parameters} was {@code null} 1905 * @hide 1906 */ 1907 public static Parameters getParametersCopy(Camera.Parameters parameters) { 1908 if (parameters == null) { 1909 throw new NullPointerException("parameters must not be null"); 1910 } 1911 1912 Camera camera = parameters.getOuter(); 1913 Parameters p = camera.new Parameters(); 1914 p.copyFrom(parameters); 1915 1916 return p; 1917 } 1918 1919 /** 1920 * Image size (width and height dimensions). 1921 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1922 * applications. 1923 */ 1924 @Deprecated 1925 public class Size { 1926 /** 1927 * Sets the dimensions for pictures. 1928 * 1929 * @param w the photo width (pixels) 1930 * @param h the photo height (pixels) 1931 */ 1932 public Size(int w, int h) { 1933 width = w; 1934 height = h; 1935 } 1936 /** 1937 * Compares {@code obj} to this size. 1938 * 1939 * @param obj the object to compare this size with. 1940 * @return {@code true} if the width and height of {@code obj} is the 1941 * same as those of this size. {@code false} otherwise. 1942 */ 1943 @Override 1944 public boolean equals(Object obj) { 1945 if (!(obj instanceof Size)) { 1946 return false; 1947 } 1948 Size s = (Size) obj; 1949 return width == s.width && height == s.height; 1950 } 1951 @Override 1952 public int hashCode() { 1953 return width * 32713 + height; 1954 } 1955 /** width of the picture */ 1956 public int width; 1957 /** height of the picture */ 1958 public int height; 1959 }; 1960 1961 /** 1962 * <p>The Area class is used for choosing specific metering and focus areas for 1963 * the camera to use when calculating auto-exposure, auto-white balance, and 1964 * auto-focus.</p> 1965 * 1966 * <p>To find out how many simultaneous areas a given camera supports, use 1967 * {@link Parameters#getMaxNumMeteringAreas()} and 1968 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1969 * selection is unsupported, these methods will return 0.</p> 1970 * 1971 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1972 * that determines its importance. The bounds are relative to the camera's 1973 * current field of view. The coordinates are mapped so that (-1000, -1000) 1974 * is always the top-left corner of the current field of view, and (1000, 1975 * 1000) is always the bottom-right corner of the current field of 1976 * view. Setting Areas with bounds outside that range is not allowed. Areas 1977 * with zero or negative width or height are not allowed.</p> 1978 * 1979 * <p>The weight must range from 1 to 1000, and represents a weight for 1980 * every pixel in the area. This means that a large metering area with 1981 * the same weight as a smaller area will have more effect in the 1982 * metering result. Metering areas can overlap and the driver 1983 * will add the weights in the overlap region.</p> 1984 * 1985 * @see Parameters#setFocusAreas(List) 1986 * @see Parameters#getFocusAreas() 1987 * @see Parameters#getMaxNumFocusAreas() 1988 * @see Parameters#setMeteringAreas(List) 1989 * @see Parameters#getMeteringAreas() 1990 * @see Parameters#getMaxNumMeteringAreas() 1991 * 1992 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1993 * applications. 1994 */ 1995 @Deprecated 1996 public static class Area { 1997 /** 1998 * Create an area with specified rectangle and weight. 1999 * 2000 * @param rect the bounds of the area. 2001 * @param weight the weight of the area. 2002 */ 2003 public Area(Rect rect, int weight) { 2004 this.rect = rect; 2005 this.weight = weight; 2006 } 2007 /** 2008 * Compares {@code obj} to this area. 2009 * 2010 * @param obj the object to compare this area with. 2011 * @return {@code true} if the rectangle and weight of {@code obj} is 2012 * the same as those of this area. {@code false} otherwise. 2013 */ 2014 @Override 2015 public boolean equals(Object obj) { 2016 if (!(obj instanceof Area)) { 2017 return false; 2018 } 2019 Area a = (Area) obj; 2020 if (rect == null) { 2021 if (a.rect != null) return false; 2022 } else { 2023 if (!rect.equals(a.rect)) return false; 2024 } 2025 return weight == a.weight; 2026 } 2027 2028 /** 2029 * Bounds of the area. (-1000, -1000) represents the top-left of the 2030 * camera field of view, and (1000, 1000) represents the bottom-right of 2031 * the field of view. Setting bounds outside that range is not 2032 * allowed. Bounds with zero or negative width or height are not 2033 * allowed. 2034 * 2035 * @see Parameters#getFocusAreas() 2036 * @see Parameters#getMeteringAreas() 2037 */ 2038 public Rect rect; 2039 2040 /** 2041 * Weight of the area. The weight must range from 1 to 1000, and 2042 * represents a weight for every pixel in the area. This means that a 2043 * large metering area with the same weight as a smaller area will have 2044 * more effect in the metering result. Metering areas can overlap and 2045 * the driver will add the weights in the overlap region. 2046 * 2047 * @see Parameters#getFocusAreas() 2048 * @see Parameters#getMeteringAreas() 2049 */ 2050 public int weight; 2051 } 2052 2053 /** 2054 * Camera service settings. 2055 * 2056 * <p>To make camera parameters take effect, applications have to call 2057 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 2058 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 2059 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 2060 * is called with the changed parameters object. 2061 * 2062 * <p>Different devices may have different camera capabilities, such as 2063 * picture size or flash modes. The application should query the camera 2064 * capabilities before setting parameters. For example, the application 2065 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 2066 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 2067 * camera does not support color effects, 2068 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 2069 * 2070 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 2071 * applications. 2072 */ 2073 @Deprecated 2074 public class Parameters { 2075 // Parameter keys to communicate with the camera driver. 2076 private static final String KEY_PREVIEW_SIZE = "preview-size"; 2077 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 2078 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 2079 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 2080 private static final String KEY_PICTURE_SIZE = "picture-size"; 2081 private static final String KEY_PICTURE_FORMAT = "picture-format"; 2082 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 2083 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 2084 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 2085 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 2086 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 2087 private static final String KEY_ROTATION = "rotation"; 2088 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 2089 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 2090 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 2091 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 2092 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 2093 private static final String KEY_WHITE_BALANCE = "whitebalance"; 2094 private static final String KEY_EFFECT = "effect"; 2095 private static final String KEY_ANTIBANDING = "antibanding"; 2096 private static final String KEY_SCENE_MODE = "scene-mode"; 2097 private static final String KEY_FLASH_MODE = "flash-mode"; 2098 private static final String KEY_FOCUS_MODE = "focus-mode"; 2099 private static final String KEY_FOCUS_AREAS = "focus-areas"; 2100 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 2101 private static final String KEY_FOCAL_LENGTH = "focal-length"; 2102 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 2103 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 2104 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 2105 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 2106 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 2107 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 2108 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 2109 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 2110 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 2111 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 2112 private static final String KEY_METERING_AREAS = "metering-areas"; 2113 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 2114 private static final String KEY_ZOOM = "zoom"; 2115 private static final String KEY_MAX_ZOOM = "max-zoom"; 2116 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 2117 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 2118 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 2119 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 2120 private static final String KEY_VIDEO_SIZE = "video-size"; 2121 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 2122 "preferred-preview-size-for-video"; 2123 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 2124 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 2125 private static final String KEY_RECORDING_HINT = "recording-hint"; 2126 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 2127 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 2128 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 2129 2130 // Parameter key suffix for supported values. 2131 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 2132 2133 private static final String TRUE = "true"; 2134 private static final String FALSE = "false"; 2135 2136 // Values for white balance settings. 2137 public static final String WHITE_BALANCE_AUTO = "auto"; 2138 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 2139 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 2140 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 2141 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 2142 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 2143 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 2144 public static final String WHITE_BALANCE_SHADE = "shade"; 2145 2146 // Values for color effect settings. 2147 public static final String EFFECT_NONE = "none"; 2148 public static final String EFFECT_MONO = "mono"; 2149 public static final String EFFECT_NEGATIVE = "negative"; 2150 public static final String EFFECT_SOLARIZE = "solarize"; 2151 public static final String EFFECT_SEPIA = "sepia"; 2152 public static final String EFFECT_POSTERIZE = "posterize"; 2153 public static final String EFFECT_WHITEBOARD = "whiteboard"; 2154 public static final String EFFECT_BLACKBOARD = "blackboard"; 2155 public static final String EFFECT_AQUA = "aqua"; 2156 2157 // Values for antibanding settings. 2158 public static final String ANTIBANDING_AUTO = "auto"; 2159 public static final String ANTIBANDING_50HZ = "50hz"; 2160 public static final String ANTIBANDING_60HZ = "60hz"; 2161 public static final String ANTIBANDING_OFF = "off"; 2162 2163 // Values for flash mode settings. 2164 /** 2165 * Flash will not be fired. 2166 */ 2167 public static final String FLASH_MODE_OFF = "off"; 2168 2169 /** 2170 * Flash will be fired automatically when required. The flash may be fired 2171 * during preview, auto-focus, or snapshot depending on the driver. 2172 */ 2173 public static final String FLASH_MODE_AUTO = "auto"; 2174 2175 /** 2176 * Flash will always be fired during snapshot. The flash may also be 2177 * fired during preview or auto-focus depending on the driver. 2178 */ 2179 public static final String FLASH_MODE_ON = "on"; 2180 2181 /** 2182 * Flash will be fired in red-eye reduction mode. 2183 */ 2184 public static final String FLASH_MODE_RED_EYE = "red-eye"; 2185 2186 /** 2187 * Constant emission of light during preview, auto-focus and snapshot. 2188 * This can also be used for video recording. 2189 */ 2190 public static final String FLASH_MODE_TORCH = "torch"; 2191 2192 /** 2193 * Scene mode is off. 2194 */ 2195 public static final String SCENE_MODE_AUTO = "auto"; 2196 2197 /** 2198 * Take photos of fast moving objects. Same as {@link 2199 * #SCENE_MODE_SPORTS}. 2200 */ 2201 public static final String SCENE_MODE_ACTION = "action"; 2202 2203 /** 2204 * Take people pictures. 2205 */ 2206 public static final String SCENE_MODE_PORTRAIT = "portrait"; 2207 2208 /** 2209 * Take pictures on distant objects. 2210 */ 2211 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 2212 2213 /** 2214 * Take photos at night. 2215 */ 2216 public static final String SCENE_MODE_NIGHT = "night"; 2217 2218 /** 2219 * Take people pictures at night. 2220 */ 2221 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 2222 2223 /** 2224 * Take photos in a theater. Flash light is off. 2225 */ 2226 public static final String SCENE_MODE_THEATRE = "theatre"; 2227 2228 /** 2229 * Take pictures on the beach. 2230 */ 2231 public static final String SCENE_MODE_BEACH = "beach"; 2232 2233 /** 2234 * Take pictures on the snow. 2235 */ 2236 public static final String SCENE_MODE_SNOW = "snow"; 2237 2238 /** 2239 * Take sunset photos. 2240 */ 2241 public static final String SCENE_MODE_SUNSET = "sunset"; 2242 2243 /** 2244 * Avoid blurry pictures (for example, due to hand shake). 2245 */ 2246 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 2247 2248 /** 2249 * For shooting firework displays. 2250 */ 2251 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 2252 2253 /** 2254 * Take photos of fast moving objects. Same as {@link 2255 * #SCENE_MODE_ACTION}. 2256 */ 2257 public static final String SCENE_MODE_SPORTS = "sports"; 2258 2259 /** 2260 * Take indoor low-light shot. 2261 */ 2262 public static final String SCENE_MODE_PARTY = "party"; 2263 2264 /** 2265 * Capture the naturally warm color of scenes lit by candles. 2266 */ 2267 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 2268 2269 /** 2270 * Applications are looking for a barcode. Camera driver will be 2271 * optimized for barcode reading. 2272 */ 2273 public static final String SCENE_MODE_BARCODE = "barcode"; 2274 2275 /** 2276 * Capture a scene using high dynamic range imaging techniques. The 2277 * camera will return an image that has an extended dynamic range 2278 * compared to a regular capture. Capturing such an image may take 2279 * longer than a regular capture. 2280 */ 2281 public static final String SCENE_MODE_HDR = "hdr"; 2282 2283 /** 2284 * Auto-focus mode. Applications should call {@link 2285 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 2286 */ 2287 public static final String FOCUS_MODE_AUTO = "auto"; 2288 2289 /** 2290 * Focus is set at infinity. Applications should not call 2291 * {@link #autoFocus(AutoFocusCallback)} in this mode. 2292 */ 2293 public static final String FOCUS_MODE_INFINITY = "infinity"; 2294 2295 /** 2296 * Macro (close-up) focus mode. Applications should call 2297 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 2298 * mode. 2299 */ 2300 public static final String FOCUS_MODE_MACRO = "macro"; 2301 2302 /** 2303 * Focus is fixed. The camera is always in this mode if the focus is not 2304 * adjustable. If the camera has auto-focus, this mode can fix the 2305 * focus, which is usually at hyperfocal distance. Applications should 2306 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 2307 */ 2308 public static final String FOCUS_MODE_FIXED = "fixed"; 2309 2310 /** 2311 * Extended depth of field (EDOF). Focusing is done digitally and 2312 * continuously. Applications should not call {@link 2313 * #autoFocus(AutoFocusCallback)} in this mode. 2314 */ 2315 public static final String FOCUS_MODE_EDOF = "edof"; 2316 2317 /** 2318 * Continuous auto focus mode intended for video recording. The camera 2319 * continuously tries to focus. This is the best choice for video 2320 * recording because the focus changes smoothly . Applications still can 2321 * call {@link #takePicture(Camera.ShutterCallback, 2322 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 2323 * subject may not be in focus. Auto focus starts when the parameter is 2324 * set. 2325 * 2326 * <p>Since API level 14, applications can call {@link 2327 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 2328 * immediately return with a boolean that indicates whether the focus is 2329 * sharp or not. The focus position is locked after autoFocus call. If 2330 * applications want to resume the continuous focus, cancelAutoFocus 2331 * must be called. Restarting the preview will not resume the continuous 2332 * autofocus. To stop continuous focus, applications should change the 2333 * focus mode to other modes. 2334 * 2335 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 2336 */ 2337 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 2338 2339 /** 2340 * Continuous auto focus mode intended for taking pictures. The camera 2341 * continuously tries to focus. The speed of focus change is more 2342 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 2343 * starts when the parameter is set. 2344 * 2345 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 2346 * this mode. If the autofocus is in the middle of scanning, the focus 2347 * callback will return when it completes. If the autofocus is not 2348 * scanning, the focus callback will immediately return with a boolean 2349 * that indicates whether the focus is sharp or not. The apps can then 2350 * decide if they want to take a picture immediately or to change the 2351 * focus mode to auto, and run a full autofocus cycle. The focus 2352 * position is locked after autoFocus call. If applications want to 2353 * resume the continuous focus, cancelAutoFocus must be called. 2354 * Restarting the preview will not resume the continuous autofocus. To 2355 * stop continuous focus, applications should change the focus mode to 2356 * other modes. 2357 * 2358 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2359 */ 2360 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 2361 2362 // Indices for focus distance array. 2363 /** 2364 * The array index of near focus distance for use with 2365 * {@link #getFocusDistances(float[])}. 2366 */ 2367 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 2368 2369 /** 2370 * The array index of optimal focus distance for use with 2371 * {@link #getFocusDistances(float[])}. 2372 */ 2373 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 2374 2375 /** 2376 * The array index of far focus distance for use with 2377 * {@link #getFocusDistances(float[])}. 2378 */ 2379 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 2380 2381 /** 2382 * The array index of minimum preview fps for use with {@link 2383 * #getPreviewFpsRange(int[])} or {@link 2384 * #getSupportedPreviewFpsRange()}. 2385 */ 2386 public static final int PREVIEW_FPS_MIN_INDEX = 0; 2387 2388 /** 2389 * The array index of maximum preview fps for use with {@link 2390 * #getPreviewFpsRange(int[])} or {@link 2391 * #getSupportedPreviewFpsRange()}. 2392 */ 2393 public static final int PREVIEW_FPS_MAX_INDEX = 1; 2394 2395 // Formats for setPreviewFormat and setPictureFormat. 2396 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 2397 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 2398 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 2399 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 2400 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 2401 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 2402 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 2403 2404 /** 2405 * Order matters: Keys that are {@link #set(String, String) set} later 2406 * will take precedence over keys that are set earlier (if the two keys 2407 * conflict with each other). 2408 * 2409 * <p>One example is {@link #setPreviewFpsRange(int, int)} , since it 2410 * conflicts with {@link #setPreviewFrameRate(int)} whichever key is set later 2411 * is the one that will take precedence. 2412 * </p> 2413 */ 2414 private final LinkedHashMap<String, String> mMap; 2415 2416 private Parameters() { 2417 mMap = new LinkedHashMap<String, String>(/*initialCapacity*/64); 2418 } 2419 2420 /** 2421 * Overwrite existing parameters with a copy of the ones from {@code other}. 2422 * 2423 * <b>For use by the legacy shim only.</b> 2424 * 2425 * @hide 2426 */ 2427 public void copyFrom(Parameters other) { 2428 if (other == null) { 2429 throw new NullPointerException("other must not be null"); 2430 } 2431 2432 mMap.putAll(other.mMap); 2433 } 2434 2435 private Camera getOuter() { 2436 return Camera.this; 2437 } 2438 2439 2440 /** 2441 * Value equality check. 2442 * 2443 * @hide 2444 */ 2445 public boolean same(Parameters other) { 2446 if (this == other) { 2447 return true; 2448 } 2449 return other != null && Parameters.this.mMap.equals(other.mMap); 2450 } 2451 2452 /** 2453 * Writes the current Parameters to the log. 2454 * @hide 2455 * @deprecated 2456 */ 2457 @Deprecated 2458 public void dump() { 2459 Log.e(TAG, "dump: size=" + mMap.size()); 2460 for (String k : mMap.keySet()) { 2461 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 2462 } 2463 } 2464 2465 /** 2466 * Creates a single string with all the parameters set in 2467 * this Parameters object. 2468 * <p>The {@link #unflatten(String)} method does the reverse.</p> 2469 * 2470 * @return a String with all values from this Parameters object, in 2471 * semi-colon delimited key-value pairs 2472 */ 2473 public String flatten() { 2474 StringBuilder flattened = new StringBuilder(128); 2475 for (String k : mMap.keySet()) { 2476 flattened.append(k); 2477 flattened.append("="); 2478 flattened.append(mMap.get(k)); 2479 flattened.append(";"); 2480 } 2481 // chop off the extra semicolon at the end 2482 flattened.deleteCharAt(flattened.length()-1); 2483 return flattened.toString(); 2484 } 2485 2486 /** 2487 * Takes a flattened string of parameters and adds each one to 2488 * this Parameters object. 2489 * <p>The {@link #flatten()} method does the reverse.</p> 2490 * 2491 * @param flattened a String of parameters (key-value paired) that 2492 * are semi-colon delimited 2493 */ 2494 public void unflatten(String flattened) { 2495 mMap.clear(); 2496 2497 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(';'); 2498 splitter.setString(flattened); 2499 for (String kv : splitter) { 2500 int pos = kv.indexOf('='); 2501 if (pos == -1) { 2502 continue; 2503 } 2504 String k = kv.substring(0, pos); 2505 String v = kv.substring(pos + 1); 2506 mMap.put(k, v); 2507 } 2508 } 2509 2510 public void remove(String key) { 2511 mMap.remove(key); 2512 } 2513 2514 /** 2515 * Sets a String parameter. 2516 * 2517 * @param key the key name for the parameter 2518 * @param value the String value of the parameter 2519 */ 2520 public void set(String key, String value) { 2521 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 2522 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 2523 return; 2524 } 2525 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 2526 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 2527 return; 2528 } 2529 2530 put(key, value); 2531 } 2532 2533 /** 2534 * Sets an integer parameter. 2535 * 2536 * @param key the key name for the parameter 2537 * @param value the int value of the parameter 2538 */ 2539 public void set(String key, int value) { 2540 put(key, Integer.toString(value)); 2541 } 2542 2543 private void put(String key, String value) { 2544 /* 2545 * Remove the key if it already exists. 2546 * 2547 * This way setting a new value for an already existing key will always move 2548 * that key to be ordered the latest in the map. 2549 */ 2550 mMap.remove(key); 2551 mMap.put(key, value); 2552 } 2553 2554 private void set(String key, List<Area> areas) { 2555 if (areas == null) { 2556 set(key, "(0,0,0,0,0)"); 2557 } else { 2558 StringBuilder buffer = new StringBuilder(); 2559 for (int i = 0; i < areas.size(); i++) { 2560 Area area = areas.get(i); 2561 Rect rect = area.rect; 2562 buffer.append('('); 2563 buffer.append(rect.left); 2564 buffer.append(','); 2565 buffer.append(rect.top); 2566 buffer.append(','); 2567 buffer.append(rect.right); 2568 buffer.append(','); 2569 buffer.append(rect.bottom); 2570 buffer.append(','); 2571 buffer.append(area.weight); 2572 buffer.append(')'); 2573 if (i != areas.size() - 1) buffer.append(','); 2574 } 2575 set(key, buffer.toString()); 2576 } 2577 } 2578 2579 /** 2580 * Returns the value of a String parameter. 2581 * 2582 * @param key the key name for the parameter 2583 * @return the String value of the parameter 2584 */ 2585 public String get(String key) { 2586 return mMap.get(key); 2587 } 2588 2589 /** 2590 * Returns the value of an integer parameter. 2591 * 2592 * @param key the key name for the parameter 2593 * @return the int value of the parameter 2594 */ 2595 public int getInt(String key) { 2596 return Integer.parseInt(mMap.get(key)); 2597 } 2598 2599 /** 2600 * Sets the dimensions for preview pictures. If the preview has already 2601 * started, applications should stop the preview first before changing 2602 * preview size. 2603 * 2604 * The sides of width and height are based on camera orientation. That 2605 * is, the preview size is the size before it is rotated by display 2606 * orientation. So applications need to consider the display orientation 2607 * while setting preview size. For example, suppose the camera supports 2608 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2609 * preview ratio. If the display orientation is set to 0 or 180, preview 2610 * size should be set to 480x320. If the display orientation is set to 2611 * 90 or 270, preview size should be set to 320x480. The display 2612 * orientation should also be considered while setting picture size and 2613 * thumbnail size. 2614 * 2615 * @param width the width of the pictures, in pixels 2616 * @param height the height of the pictures, in pixels 2617 * @see #setDisplayOrientation(int) 2618 * @see #getCameraInfo(int, CameraInfo) 2619 * @see #setPictureSize(int, int) 2620 * @see #setJpegThumbnailSize(int, int) 2621 */ 2622 public void setPreviewSize(int width, int height) { 2623 String v = Integer.toString(width) + "x" + Integer.toString(height); 2624 set(KEY_PREVIEW_SIZE, v); 2625 } 2626 2627 /** 2628 * Returns the dimensions setting for preview pictures. 2629 * 2630 * @return a Size object with the width and height setting 2631 * for the preview picture 2632 */ 2633 public Size getPreviewSize() { 2634 String pair = get(KEY_PREVIEW_SIZE); 2635 return strToSize(pair); 2636 } 2637 2638 /** 2639 * Gets the supported preview sizes. 2640 * 2641 * @return a list of Size object. This method will always return a list 2642 * with at least one element. 2643 */ 2644 public List<Size> getSupportedPreviewSizes() { 2645 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2646 return splitSize(str); 2647 } 2648 2649 /** 2650 * <p>Gets the supported video frame sizes that can be used by 2651 * MediaRecorder.</p> 2652 * 2653 * <p>If the returned list is not null, the returned list will contain at 2654 * least one Size and one of the sizes in the returned list must be 2655 * passed to MediaRecorder.setVideoSize() for camcorder application if 2656 * camera is used as the video source. In this case, the size of the 2657 * preview can be different from the resolution of the recorded video 2658 * during video recording.</p> 2659 * 2660 * @return a list of Size object if camera has separate preview and 2661 * video output; otherwise, null is returned. 2662 * @see #getPreferredPreviewSizeForVideo() 2663 */ 2664 public List<Size> getSupportedVideoSizes() { 2665 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2666 return splitSize(str); 2667 } 2668 2669 /** 2670 * Returns the preferred or recommended preview size (width and height) 2671 * in pixels for video recording. Camcorder applications should 2672 * set the preview size to a value that is not larger than the 2673 * preferred preview size. In other words, the product of the width 2674 * and height of the preview size should not be larger than that of 2675 * the preferred preview size. In addition, we recommend to choose a 2676 * preview size that has the same aspect ratio as the resolution of 2677 * video to be recorded. 2678 * 2679 * @return the preferred preview size (width and height) in pixels for 2680 * video recording if getSupportedVideoSizes() does not return 2681 * null; otherwise, null is returned. 2682 * @see #getSupportedVideoSizes() 2683 */ 2684 public Size getPreferredPreviewSizeForVideo() { 2685 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2686 return strToSize(pair); 2687 } 2688 2689 /** 2690 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2691 * applications set both width and height to 0, EXIF will not contain 2692 * thumbnail.</p> 2693 * 2694 * <p>Applications need to consider the display orientation. See {@link 2695 * #setPreviewSize(int,int)} for reference.</p> 2696 * 2697 * @param width the width of the thumbnail, in pixels 2698 * @param height the height of the thumbnail, in pixels 2699 * @see #setPreviewSize(int,int) 2700 */ 2701 public void setJpegThumbnailSize(int width, int height) { 2702 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2703 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2704 } 2705 2706 /** 2707 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2708 * 2709 * @return a Size object with the height and width setting for the EXIF 2710 * thumbnails 2711 */ 2712 public Size getJpegThumbnailSize() { 2713 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2714 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2715 } 2716 2717 /** 2718 * Gets the supported jpeg thumbnail sizes. 2719 * 2720 * @return a list of Size object. This method will always return a list 2721 * with at least two elements. Size 0,0 (no thumbnail) is always 2722 * supported. 2723 */ 2724 public List<Size> getSupportedJpegThumbnailSizes() { 2725 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2726 return splitSize(str); 2727 } 2728 2729 /** 2730 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2731 * 2732 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2733 * to 100, with 100 being the best. 2734 */ 2735 public void setJpegThumbnailQuality(int quality) { 2736 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2737 } 2738 2739 /** 2740 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2741 * 2742 * @return the JPEG quality setting of the EXIF thumbnail. 2743 */ 2744 public int getJpegThumbnailQuality() { 2745 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2746 } 2747 2748 /** 2749 * Sets Jpeg quality of captured picture. 2750 * 2751 * @param quality the JPEG quality of captured picture. The range is 1 2752 * to 100, with 100 being the best. 2753 */ 2754 public void setJpegQuality(int quality) { 2755 set(KEY_JPEG_QUALITY, quality); 2756 } 2757 2758 /** 2759 * Returns the quality setting for the JPEG picture. 2760 * 2761 * @return the JPEG picture quality setting. 2762 */ 2763 public int getJpegQuality() { 2764 return getInt(KEY_JPEG_QUALITY); 2765 } 2766 2767 /** 2768 * Sets the rate at which preview frames are received. This is the 2769 * target frame rate. The actual frame rate depends on the driver. 2770 * 2771 * @param fps the frame rate (frames per second) 2772 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2773 */ 2774 @Deprecated 2775 public void setPreviewFrameRate(int fps) { 2776 set(KEY_PREVIEW_FRAME_RATE, fps); 2777 } 2778 2779 /** 2780 * Returns the setting for the rate at which preview frames are 2781 * received. This is the target frame rate. The actual frame rate 2782 * depends on the driver. 2783 * 2784 * @return the frame rate setting (frames per second) 2785 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2786 */ 2787 @Deprecated 2788 public int getPreviewFrameRate() { 2789 return getInt(KEY_PREVIEW_FRAME_RATE); 2790 } 2791 2792 /** 2793 * Gets the supported preview frame rates. 2794 * 2795 * @return a list of supported preview frame rates. null if preview 2796 * frame rate setting is not supported. 2797 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2798 */ 2799 @Deprecated 2800 public List<Integer> getSupportedPreviewFrameRates() { 2801 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2802 return splitInt(str); 2803 } 2804 2805 /** 2806 * Sets the minimum and maximum preview fps. This controls the rate of 2807 * preview frames received in {@link PreviewCallback}. The minimum and 2808 * maximum preview fps must be one of the elements from {@link 2809 * #getSupportedPreviewFpsRange}. 2810 * 2811 * @param min the minimum preview fps (scaled by 1000). 2812 * @param max the maximum preview fps (scaled by 1000). 2813 * @throws RuntimeException if fps range is invalid. 2814 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2815 * @see #getSupportedPreviewFpsRange() 2816 */ 2817 public void setPreviewFpsRange(int min, int max) { 2818 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2819 } 2820 2821 /** 2822 * Returns the current minimum and maximum preview fps. The values are 2823 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2824 * 2825 * @return range the minimum and maximum preview fps (scaled by 1000). 2826 * @see #PREVIEW_FPS_MIN_INDEX 2827 * @see #PREVIEW_FPS_MAX_INDEX 2828 * @see #getSupportedPreviewFpsRange() 2829 */ 2830 public void getPreviewFpsRange(int[] range) { 2831 if (range == null || range.length != 2) { 2832 throw new IllegalArgumentException( 2833 "range must be an array with two elements."); 2834 } 2835 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2836 } 2837 2838 /** 2839 * Gets the supported preview fps (frame-per-second) ranges. Each range 2840 * contains a minimum fps and maximum fps. If minimum fps equals to 2841 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2842 * the camera outputs frames in auto frame rate. The actual frame rate 2843 * fluctuates between the minimum and the maximum. The values are 2844 * multiplied by 1000 and represented in integers. For example, if frame 2845 * rate is 26.623 frames per second, the value is 26623. 2846 * 2847 * @return a list of supported preview fps ranges. This method returns a 2848 * list with at least one element. Every element is an int array 2849 * of two values - minimum fps and maximum fps. The list is 2850 * sorted from small to large (first by maximum fps and then 2851 * minimum fps). 2852 * @see #PREVIEW_FPS_MIN_INDEX 2853 * @see #PREVIEW_FPS_MAX_INDEX 2854 */ 2855 public List<int[]> getSupportedPreviewFpsRange() { 2856 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2857 return splitRange(str); 2858 } 2859 2860 /** 2861 * Sets the image format for preview pictures. 2862 * <p>If this is never called, the default format will be 2863 * {@link android.graphics.ImageFormat#NV21}, which 2864 * uses the NV21 encoding format.</p> 2865 * 2866 * <p>Use {@link Parameters#getSupportedPreviewFormats} to get a list of 2867 * the available preview formats. 2868 * 2869 * <p>It is strongly recommended that either 2870 * {@link android.graphics.ImageFormat#NV21} or 2871 * {@link android.graphics.ImageFormat#YV12} is used, since 2872 * they are supported by all camera devices.</p> 2873 * 2874 * <p>For YV12, the image buffer that is received is not necessarily 2875 * tightly packed, as there may be padding at the end of each row of 2876 * pixel data, as described in 2877 * {@link android.graphics.ImageFormat#YV12}. For camera callback data, 2878 * it can be assumed that the stride of the Y and UV data is the 2879 * smallest possible that meets the alignment requirements. That is, if 2880 * the preview size is <var>width x height</var>, then the following 2881 * equations describe the buffer index for the beginning of row 2882 * <var>y</var> for the Y plane and row <var>c</var> for the U and V 2883 * planes: 2884 * 2885 * {@code 2886 * <pre> 2887 * yStride = (int) ceil(width / 16.0) * 16; 2888 * uvStride = (int) ceil( (yStride / 2) / 16.0) * 16; 2889 * ySize = yStride * height; 2890 * uvSize = uvStride * height / 2; 2891 * yRowIndex = yStride * y; 2892 * uRowIndex = ySize + uvSize + uvStride * c; 2893 * vRowIndex = ySize + uvStride * c; 2894 * size = ySize + uvSize * 2;</pre> 2895 * } 2896 * 2897 * @param pixel_format the desired preview picture format, defined by 2898 * one of the {@link android.graphics.ImageFormat} constants. (E.g., 2899 * <var>ImageFormat.NV21</var> (default), or 2900 * <var>ImageFormat.YV12</var>) 2901 * 2902 * @see android.graphics.ImageFormat 2903 * @see android.hardware.Camera.Parameters#getSupportedPreviewFormats 2904 */ 2905 public void setPreviewFormat(int pixel_format) { 2906 String s = cameraFormatForPixelFormat(pixel_format); 2907 if (s == null) { 2908 throw new IllegalArgumentException( 2909 "Invalid pixel_format=" + pixel_format); 2910 } 2911 2912 set(KEY_PREVIEW_FORMAT, s); 2913 } 2914 2915 /** 2916 * Returns the image format for preview frames got from 2917 * {@link PreviewCallback}. 2918 * 2919 * @return the preview format. 2920 * @see android.graphics.ImageFormat 2921 * @see #setPreviewFormat 2922 */ 2923 public int getPreviewFormat() { 2924 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2925 } 2926 2927 /** 2928 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2929 * is always supported. {@link android.graphics.ImageFormat#YV12} 2930 * is always supported since API level 12. 2931 * 2932 * @return a list of supported preview formats. This method will always 2933 * return a list with at least one element. 2934 * @see android.graphics.ImageFormat 2935 * @see #setPreviewFormat 2936 */ 2937 public List<Integer> getSupportedPreviewFormats() { 2938 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2939 ArrayList<Integer> formats = new ArrayList<Integer>(); 2940 for (String s : split(str)) { 2941 int f = pixelFormatForCameraFormat(s); 2942 if (f == ImageFormat.UNKNOWN) continue; 2943 formats.add(f); 2944 } 2945 return formats; 2946 } 2947 2948 /** 2949 * <p>Sets the dimensions for pictures.</p> 2950 * 2951 * <p>Applications need to consider the display orientation. See {@link 2952 * #setPreviewSize(int,int)} for reference.</p> 2953 * 2954 * @param width the width for pictures, in pixels 2955 * @param height the height for pictures, in pixels 2956 * @see #setPreviewSize(int,int) 2957 * 2958 */ 2959 public void setPictureSize(int width, int height) { 2960 String v = Integer.toString(width) + "x" + Integer.toString(height); 2961 set(KEY_PICTURE_SIZE, v); 2962 } 2963 2964 /** 2965 * Returns the dimension setting for pictures. 2966 * 2967 * @return a Size object with the height and width setting 2968 * for pictures 2969 */ 2970 public Size getPictureSize() { 2971 String pair = get(KEY_PICTURE_SIZE); 2972 return strToSize(pair); 2973 } 2974 2975 /** 2976 * Gets the supported picture sizes. 2977 * 2978 * @return a list of supported picture sizes. This method will always 2979 * return a list with at least one element. 2980 */ 2981 public List<Size> getSupportedPictureSizes() { 2982 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2983 return splitSize(str); 2984 } 2985 2986 /** 2987 * Sets the image format for pictures. 2988 * 2989 * @param pixel_format the desired picture format 2990 * (<var>ImageFormat.NV21</var>, 2991 * <var>ImageFormat.RGB_565</var>, or 2992 * <var>ImageFormat.JPEG</var>) 2993 * @see android.graphics.ImageFormat 2994 */ 2995 public void setPictureFormat(int pixel_format) { 2996 String s = cameraFormatForPixelFormat(pixel_format); 2997 if (s == null) { 2998 throw new IllegalArgumentException( 2999 "Invalid pixel_format=" + pixel_format); 3000 } 3001 3002 set(KEY_PICTURE_FORMAT, s); 3003 } 3004 3005 /** 3006 * Returns the image format for pictures. 3007 * 3008 * @return the picture format 3009 * @see android.graphics.ImageFormat 3010 */ 3011 public int getPictureFormat() { 3012 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 3013 } 3014 3015 /** 3016 * Gets the supported picture formats. 3017 * 3018 * @return supported picture formats. This method will always return a 3019 * list with at least one element. 3020 * @see android.graphics.ImageFormat 3021 */ 3022 public List<Integer> getSupportedPictureFormats() { 3023 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 3024 ArrayList<Integer> formats = new ArrayList<Integer>(); 3025 for (String s : split(str)) { 3026 int f = pixelFormatForCameraFormat(s); 3027 if (f == ImageFormat.UNKNOWN) continue; 3028 formats.add(f); 3029 } 3030 return formats; 3031 } 3032 3033 private String cameraFormatForPixelFormat(int pixel_format) { 3034 switch(pixel_format) { 3035 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 3036 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 3037 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 3038 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 3039 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 3040 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 3041 default: return null; 3042 } 3043 } 3044 3045 private int pixelFormatForCameraFormat(String format) { 3046 if (format == null) 3047 return ImageFormat.UNKNOWN; 3048 3049 if (format.equals(PIXEL_FORMAT_YUV422SP)) 3050 return ImageFormat.NV16; 3051 3052 if (format.equals(PIXEL_FORMAT_YUV420SP)) 3053 return ImageFormat.NV21; 3054 3055 if (format.equals(PIXEL_FORMAT_YUV422I)) 3056 return ImageFormat.YUY2; 3057 3058 if (format.equals(PIXEL_FORMAT_YUV420P)) 3059 return ImageFormat.YV12; 3060 3061 if (format.equals(PIXEL_FORMAT_RGB565)) 3062 return ImageFormat.RGB_565; 3063 3064 if (format.equals(PIXEL_FORMAT_JPEG)) 3065 return ImageFormat.JPEG; 3066 3067 return ImageFormat.UNKNOWN; 3068 } 3069 3070 /** 3071 * Sets the clockwise rotation angle in degrees relative to the 3072 * orientation of the camera. This affects the pictures returned from 3073 * JPEG {@link PictureCallback}. The camera driver may set orientation 3074 * in the EXIF header without rotating the picture. Or the driver may 3075 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 3076 * rotated, the orientation in the EXIF header will be missing or 1 (row 3077 * #0 is top and column #0 is left side). 3078 * 3079 * <p> 3080 * If applications want to rotate the picture to match the orientation 3081 * of what users see, apps should use 3082 * {@link android.view.OrientationEventListener} and 3083 * {@link android.hardware.Camera.CameraInfo}. The value from 3084 * OrientationEventListener is relative to the natural orientation of 3085 * the device. CameraInfo.orientation is the angle between camera 3086 * orientation and natural device orientation. The sum of the two is the 3087 * rotation angle for back-facing camera. The difference of the two is 3088 * the rotation angle for front-facing camera. Note that the JPEG 3089 * pictures of front-facing cameras are not mirrored as in preview 3090 * display. 3091 * 3092 * <p> 3093 * For example, suppose the natural orientation of the device is 3094 * portrait. The device is rotated 270 degrees clockwise, so the device 3095 * orientation is 270. Suppose a back-facing camera sensor is mounted in 3096 * landscape and the top side of the camera sensor is aligned with the 3097 * right edge of the display in natural orientation. So the camera 3098 * orientation is 90. The rotation should be set to 0 (270 + 90). 3099 * 3100 * <p>The reference code is as follows. 3101 * 3102 * <pre> 3103 * public void onOrientationChanged(int orientation) { 3104 * if (orientation == ORIENTATION_UNKNOWN) return; 3105 * android.hardware.Camera.CameraInfo info = 3106 * new android.hardware.Camera.CameraInfo(); 3107 * android.hardware.Camera.getCameraInfo(cameraId, info); 3108 * orientation = (orientation + 45) / 90 * 90; 3109 * int rotation = 0; 3110 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 3111 * rotation = (info.orientation - orientation + 360) % 360; 3112 * } else { // back-facing camera 3113 * rotation = (info.orientation + orientation) % 360; 3114 * } 3115 * mParameters.setRotation(rotation); 3116 * } 3117 * </pre> 3118 * 3119 * @param rotation The rotation angle in degrees relative to the 3120 * orientation of the camera. Rotation can only be 0, 3121 * 90, 180 or 270. 3122 * @throws IllegalArgumentException if rotation value is invalid. 3123 * @see android.view.OrientationEventListener 3124 * @see #getCameraInfo(int, CameraInfo) 3125 */ 3126 public void setRotation(int rotation) { 3127 if (rotation == 0 || rotation == 90 || rotation == 180 3128 || rotation == 270) { 3129 set(KEY_ROTATION, Integer.toString(rotation)); 3130 } else { 3131 throw new IllegalArgumentException( 3132 "Invalid rotation=" + rotation); 3133 } 3134 } 3135 3136 /** 3137 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 3138 * header. 3139 * 3140 * @param latitude GPS latitude coordinate. 3141 */ 3142 public void setGpsLatitude(double latitude) { 3143 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 3144 } 3145 3146 /** 3147 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 3148 * header. 3149 * 3150 * @param longitude GPS longitude coordinate. 3151 */ 3152 public void setGpsLongitude(double longitude) { 3153 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 3154 } 3155 3156 /** 3157 * Sets GPS altitude. This will be stored in JPEG EXIF header. 3158 * 3159 * @param altitude GPS altitude in meters. 3160 */ 3161 public void setGpsAltitude(double altitude) { 3162 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 3163 } 3164 3165 /** 3166 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 3167 * 3168 * @param timestamp GPS timestamp (UTC in seconds since January 1, 3169 * 1970). 3170 */ 3171 public void setGpsTimestamp(long timestamp) { 3172 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 3173 } 3174 3175 /** 3176 * Sets GPS processing method. It will store up to 32 characters 3177 * in JPEG EXIF header. 3178 * 3179 * @param processing_method The processing method to get this location. 3180 */ 3181 public void setGpsProcessingMethod(String processing_method) { 3182 set(KEY_GPS_PROCESSING_METHOD, processing_method); 3183 } 3184 3185 /** 3186 * Removes GPS latitude, longitude, altitude, and timestamp from the 3187 * parameters. 3188 */ 3189 public void removeGpsData() { 3190 remove(KEY_GPS_LATITUDE); 3191 remove(KEY_GPS_LONGITUDE); 3192 remove(KEY_GPS_ALTITUDE); 3193 remove(KEY_GPS_TIMESTAMP); 3194 remove(KEY_GPS_PROCESSING_METHOD); 3195 } 3196 3197 /** 3198 * Gets the current white balance setting. 3199 * 3200 * @return current white balance. null if white balance setting is not 3201 * supported. 3202 * @see #WHITE_BALANCE_AUTO 3203 * @see #WHITE_BALANCE_INCANDESCENT 3204 * @see #WHITE_BALANCE_FLUORESCENT 3205 * @see #WHITE_BALANCE_WARM_FLUORESCENT 3206 * @see #WHITE_BALANCE_DAYLIGHT 3207 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 3208 * @see #WHITE_BALANCE_TWILIGHT 3209 * @see #WHITE_BALANCE_SHADE 3210 * 3211 */ 3212 public String getWhiteBalance() { 3213 return get(KEY_WHITE_BALANCE); 3214 } 3215 3216 /** 3217 * Sets the white balance. Changing the setting will release the 3218 * auto-white balance lock. It is recommended not to change white 3219 * balance and AWB lock at the same time. 3220 * 3221 * @param value new white balance. 3222 * @see #getWhiteBalance() 3223 * @see #setAutoWhiteBalanceLock(boolean) 3224 */ 3225 public void setWhiteBalance(String value) { 3226 String oldValue = get(KEY_WHITE_BALANCE); 3227 if (same(value, oldValue)) return; 3228 set(KEY_WHITE_BALANCE, value); 3229 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 3230 } 3231 3232 /** 3233 * Gets the supported white balance. 3234 * 3235 * @return a list of supported white balance. null if white balance 3236 * setting is not supported. 3237 * @see #getWhiteBalance() 3238 */ 3239 public List<String> getSupportedWhiteBalance() { 3240 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 3241 return split(str); 3242 } 3243 3244 /** 3245 * Gets the current color effect setting. 3246 * 3247 * @return current color effect. null if color effect 3248 * setting is not supported. 3249 * @see #EFFECT_NONE 3250 * @see #EFFECT_MONO 3251 * @see #EFFECT_NEGATIVE 3252 * @see #EFFECT_SOLARIZE 3253 * @see #EFFECT_SEPIA 3254 * @see #EFFECT_POSTERIZE 3255 * @see #EFFECT_WHITEBOARD 3256 * @see #EFFECT_BLACKBOARD 3257 * @see #EFFECT_AQUA 3258 */ 3259 public String getColorEffect() { 3260 return get(KEY_EFFECT); 3261 } 3262 3263 /** 3264 * Sets the current color effect setting. 3265 * 3266 * @param value new color effect. 3267 * @see #getColorEffect() 3268 */ 3269 public void setColorEffect(String value) { 3270 set(KEY_EFFECT, value); 3271 } 3272 3273 /** 3274 * Gets the supported color effects. 3275 * 3276 * @return a list of supported color effects. null if color effect 3277 * setting is not supported. 3278 * @see #getColorEffect() 3279 */ 3280 public List<String> getSupportedColorEffects() { 3281 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 3282 return split(str); 3283 } 3284 3285 3286 /** 3287 * Gets the current antibanding setting. 3288 * 3289 * @return current antibanding. null if antibanding setting is not 3290 * supported. 3291 * @see #ANTIBANDING_AUTO 3292 * @see #ANTIBANDING_50HZ 3293 * @see #ANTIBANDING_60HZ 3294 * @see #ANTIBANDING_OFF 3295 */ 3296 public String getAntibanding() { 3297 return get(KEY_ANTIBANDING); 3298 } 3299 3300 /** 3301 * Sets the antibanding. 3302 * 3303 * @param antibanding new antibanding value. 3304 * @see #getAntibanding() 3305 */ 3306 public void setAntibanding(String antibanding) { 3307 set(KEY_ANTIBANDING, antibanding); 3308 } 3309 3310 /** 3311 * Gets the supported antibanding values. 3312 * 3313 * @return a list of supported antibanding values. null if antibanding 3314 * setting is not supported. 3315 * @see #getAntibanding() 3316 */ 3317 public List<String> getSupportedAntibanding() { 3318 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 3319 return split(str); 3320 } 3321 3322 /** 3323 * Gets the current scene mode setting. 3324 * 3325 * @return one of SCENE_MODE_XXX string constant. null if scene mode 3326 * setting is not supported. 3327 * @see #SCENE_MODE_AUTO 3328 * @see #SCENE_MODE_ACTION 3329 * @see #SCENE_MODE_PORTRAIT 3330 * @see #SCENE_MODE_LANDSCAPE 3331 * @see #SCENE_MODE_NIGHT 3332 * @see #SCENE_MODE_NIGHT_PORTRAIT 3333 * @see #SCENE_MODE_THEATRE 3334 * @see #SCENE_MODE_BEACH 3335 * @see #SCENE_MODE_SNOW 3336 * @see #SCENE_MODE_SUNSET 3337 * @see #SCENE_MODE_STEADYPHOTO 3338 * @see #SCENE_MODE_FIREWORKS 3339 * @see #SCENE_MODE_SPORTS 3340 * @see #SCENE_MODE_PARTY 3341 * @see #SCENE_MODE_CANDLELIGHT 3342 * @see #SCENE_MODE_BARCODE 3343 */ 3344 public String getSceneMode() { 3345 return get(KEY_SCENE_MODE); 3346 } 3347 3348 /** 3349 * Sets the scene mode. Changing scene mode may override other 3350 * parameters (such as flash mode, focus mode, white balance). For 3351 * example, suppose originally flash mode is on and supported flash 3352 * modes are on/off. In night scene mode, both flash mode and supported 3353 * flash mode may be changed to off. After setting scene mode, 3354 * applications should call getParameters to know if some parameters are 3355 * changed. 3356 * 3357 * @param value scene mode. 3358 * @see #getSceneMode() 3359 */ 3360 public void setSceneMode(String value) { 3361 set(KEY_SCENE_MODE, value); 3362 } 3363 3364 /** 3365 * Gets the supported scene modes. 3366 * 3367 * @return a list of supported scene modes. null if scene mode setting 3368 * is not supported. 3369 * @see #getSceneMode() 3370 */ 3371 public List<String> getSupportedSceneModes() { 3372 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 3373 return split(str); 3374 } 3375 3376 /** 3377 * Gets the current flash mode setting. 3378 * 3379 * @return current flash mode. null if flash mode setting is not 3380 * supported. 3381 * @see #FLASH_MODE_OFF 3382 * @see #FLASH_MODE_AUTO 3383 * @see #FLASH_MODE_ON 3384 * @see #FLASH_MODE_RED_EYE 3385 * @see #FLASH_MODE_TORCH 3386 */ 3387 public String getFlashMode() { 3388 return get(KEY_FLASH_MODE); 3389 } 3390 3391 /** 3392 * Sets the flash mode. 3393 * 3394 * @param value flash mode. 3395 * @see #getFlashMode() 3396 */ 3397 public void setFlashMode(String value) { 3398 set(KEY_FLASH_MODE, value); 3399 } 3400 3401 /** 3402 * Gets the supported flash modes. 3403 * 3404 * @return a list of supported flash modes. null if flash mode setting 3405 * is not supported. 3406 * @see #getFlashMode() 3407 */ 3408 public List<String> getSupportedFlashModes() { 3409 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 3410 return split(str); 3411 } 3412 3413 /** 3414 * Gets the current focus mode setting. 3415 * 3416 * @return current focus mode. This method will always return a non-null 3417 * value. Applications should call {@link 3418 * #autoFocus(AutoFocusCallback)} to start the focus if focus 3419 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 3420 * @see #FOCUS_MODE_AUTO 3421 * @see #FOCUS_MODE_INFINITY 3422 * @see #FOCUS_MODE_MACRO 3423 * @see #FOCUS_MODE_FIXED 3424 * @see #FOCUS_MODE_EDOF 3425 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 3426 */ 3427 public String getFocusMode() { 3428 return get(KEY_FOCUS_MODE); 3429 } 3430 3431 /** 3432 * Sets the focus mode. 3433 * 3434 * @param value focus mode. 3435 * @see #getFocusMode() 3436 */ 3437 public void setFocusMode(String value) { 3438 set(KEY_FOCUS_MODE, value); 3439 } 3440 3441 /** 3442 * Gets the supported focus modes. 3443 * 3444 * @return a list of supported focus modes. This method will always 3445 * return a list with at least one element. 3446 * @see #getFocusMode() 3447 */ 3448 public List<String> getSupportedFocusModes() { 3449 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 3450 return split(str); 3451 } 3452 3453 /** 3454 * Gets the focal length (in millimeter) of the camera. 3455 * 3456 * @return the focal length. This method will always return a valid 3457 * value. 3458 */ 3459 public float getFocalLength() { 3460 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 3461 } 3462 3463 /** 3464 * Gets the horizontal angle of view in degrees. 3465 * 3466 * @return horizontal angle of view. This method will always return a 3467 * valid value. 3468 */ 3469 public float getHorizontalViewAngle() { 3470 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 3471 } 3472 3473 /** 3474 * Gets the vertical angle of view in degrees. 3475 * 3476 * @return vertical angle of view. This method will always return a 3477 * valid value. 3478 */ 3479 public float getVerticalViewAngle() { 3480 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 3481 } 3482 3483 /** 3484 * Gets the current exposure compensation index. 3485 * 3486 * @return current exposure compensation index. The range is {@link 3487 * #getMinExposureCompensation} to {@link 3488 * #getMaxExposureCompensation}. 0 means exposure is not 3489 * adjusted. 3490 */ 3491 public int getExposureCompensation() { 3492 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 3493 } 3494 3495 /** 3496 * Sets the exposure compensation index. 3497 * 3498 * @param value exposure compensation index. The valid value range is 3499 * from {@link #getMinExposureCompensation} (inclusive) to {@link 3500 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 3501 * not adjusted. Application should call 3502 * getMinExposureCompensation and getMaxExposureCompensation to 3503 * know if exposure compensation is supported. 3504 */ 3505 public void setExposureCompensation(int value) { 3506 set(KEY_EXPOSURE_COMPENSATION, value); 3507 } 3508 3509 /** 3510 * Gets the maximum exposure compensation index. 3511 * 3512 * @return maximum exposure compensation index (>=0). If both this 3513 * method and {@link #getMinExposureCompensation} return 0, 3514 * exposure compensation is not supported. 3515 */ 3516 public int getMaxExposureCompensation() { 3517 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 3518 } 3519 3520 /** 3521 * Gets the minimum exposure compensation index. 3522 * 3523 * @return minimum exposure compensation index (<=0). If both this 3524 * method and {@link #getMaxExposureCompensation} return 0, 3525 * exposure compensation is not supported. 3526 */ 3527 public int getMinExposureCompensation() { 3528 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 3529 } 3530 3531 /** 3532 * Gets the exposure compensation step. 3533 * 3534 * @return exposure compensation step. Applications can get EV by 3535 * multiplying the exposure compensation index and step. Ex: if 3536 * exposure compensation index is -6 and step is 0.333333333, EV 3537 * is -2. 3538 */ 3539 public float getExposureCompensationStep() { 3540 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 3541 } 3542 3543 /** 3544 * <p>Sets the auto-exposure lock state. Applications should check 3545 * {@link #isAutoExposureLockSupported} before using this method.</p> 3546 * 3547 * <p>If set to true, the camera auto-exposure routine will immediately 3548 * pause until the lock is set to false. Exposure compensation settings 3549 * changes will still take effect while auto-exposure is locked.</p> 3550 * 3551 * <p>If auto-exposure is already locked, setting this to true again has 3552 * no effect (the driver will not recalculate exposure values).</p> 3553 * 3554 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3555 * image capture with {@link #takePicture(Camera.ShutterCallback, 3556 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3557 * lock.</p> 3558 * 3559 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 3560 * lock can be used to capture an exposure-bracketed burst of images, 3561 * for example.</p> 3562 * 3563 * <p>Auto-exposure state, including the lock state, will not be 3564 * maintained after camera {@link #release()} is called. Locking 3565 * auto-exposure after {@link #open()} but before the first call to 3566 * {@link #startPreview()} will not allow the auto-exposure routine to 3567 * run at all, and may result in severely over- or under-exposed 3568 * images.</p> 3569 * 3570 * @param toggle new state of the auto-exposure lock. True means that 3571 * auto-exposure is locked, false means that the auto-exposure 3572 * routine is free to run normally. 3573 * 3574 * @see #getAutoExposureLock() 3575 */ 3576 public void setAutoExposureLock(boolean toggle) { 3577 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 3578 } 3579 3580 /** 3581 * Gets the state of the auto-exposure lock. Applications should check 3582 * {@link #isAutoExposureLockSupported} before using this method. See 3583 * {@link #setAutoExposureLock} for details about the lock. 3584 * 3585 * @return State of the auto-exposure lock. Returns true if 3586 * auto-exposure is currently locked, and false otherwise. 3587 * 3588 * @see #setAutoExposureLock(boolean) 3589 * 3590 */ 3591 public boolean getAutoExposureLock() { 3592 String str = get(KEY_AUTO_EXPOSURE_LOCK); 3593 return TRUE.equals(str); 3594 } 3595 3596 /** 3597 * Returns true if auto-exposure locking is supported. Applications 3598 * should call this before trying to lock auto-exposure. See 3599 * {@link #setAutoExposureLock} for details about the lock. 3600 * 3601 * @return true if auto-exposure lock is supported. 3602 * @see #setAutoExposureLock(boolean) 3603 * 3604 */ 3605 public boolean isAutoExposureLockSupported() { 3606 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 3607 return TRUE.equals(str); 3608 } 3609 3610 /** 3611 * <p>Sets the auto-white balance lock state. Applications should check 3612 * {@link #isAutoWhiteBalanceLockSupported} before using this 3613 * method.</p> 3614 * 3615 * <p>If set to true, the camera auto-white balance routine will 3616 * immediately pause until the lock is set to false.</p> 3617 * 3618 * <p>If auto-white balance is already locked, setting this to true 3619 * again has no effect (the driver will not recalculate white balance 3620 * values).</p> 3621 * 3622 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3623 * image capture with {@link #takePicture(Camera.ShutterCallback, 3624 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3625 * the lock.</p> 3626 * 3627 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3628 * will release the auto-white balance lock if it is set.</p> 3629 * 3630 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3631 * capture an exposure-bracketed burst of images, for example. 3632 * Auto-white balance state, including the lock state, will not be 3633 * maintained after camera {@link #release()} is called. Locking 3634 * auto-white balance after {@link #open()} but before the first call to 3635 * {@link #startPreview()} will not allow the auto-white balance routine 3636 * to run at all, and may result in severely incorrect color in captured 3637 * images.</p> 3638 * 3639 * @param toggle new state of the auto-white balance lock. True means 3640 * that auto-white balance is locked, false means that the 3641 * auto-white balance routine is free to run normally. 3642 * 3643 * @see #getAutoWhiteBalanceLock() 3644 * @see #setWhiteBalance(String) 3645 */ 3646 public void setAutoWhiteBalanceLock(boolean toggle) { 3647 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3648 } 3649 3650 /** 3651 * Gets the state of the auto-white balance lock. Applications should 3652 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3653 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3654 * lock. 3655 * 3656 * @return State of the auto-white balance lock. Returns true if 3657 * auto-white balance is currently locked, and false 3658 * otherwise. 3659 * 3660 * @see #setAutoWhiteBalanceLock(boolean) 3661 * 3662 */ 3663 public boolean getAutoWhiteBalanceLock() { 3664 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3665 return TRUE.equals(str); 3666 } 3667 3668 /** 3669 * Returns true if auto-white balance locking is supported. Applications 3670 * should call this before trying to lock auto-white balance. See 3671 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3672 * 3673 * @return true if auto-white balance lock is supported. 3674 * @see #setAutoWhiteBalanceLock(boolean) 3675 * 3676 */ 3677 public boolean isAutoWhiteBalanceLockSupported() { 3678 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3679 return TRUE.equals(str); 3680 } 3681 3682 /** 3683 * Gets current zoom value. This also works when smooth zoom is in 3684 * progress. Applications should check {@link #isZoomSupported} before 3685 * using this method. 3686 * 3687 * @return the current zoom value. The range is 0 to {@link 3688 * #getMaxZoom}. 0 means the camera is not zoomed. 3689 */ 3690 public int getZoom() { 3691 return getInt(KEY_ZOOM, 0); 3692 } 3693 3694 /** 3695 * Sets current zoom value. If the camera is zoomed (value > 0), the 3696 * actual picture size may be smaller than picture size setting. 3697 * Applications can check the actual picture size after picture is 3698 * returned from {@link PictureCallback}. The preview size remains the 3699 * same in zoom. Applications should check {@link #isZoomSupported} 3700 * before using this method. 3701 * 3702 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3703 */ 3704 public void setZoom(int value) { 3705 set(KEY_ZOOM, value); 3706 } 3707 3708 /** 3709 * Returns true if zoom is supported. Applications should call this 3710 * before using other zoom methods. 3711 * 3712 * @return true if zoom is supported. 3713 */ 3714 public boolean isZoomSupported() { 3715 String str = get(KEY_ZOOM_SUPPORTED); 3716 return TRUE.equals(str); 3717 } 3718 3719 /** 3720 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3721 * value that applications can set to {@link #setZoom(int)}. 3722 * Applications should call {@link #isZoomSupported} before using this 3723 * method. This value may change in different preview size. Applications 3724 * should call this again after setting preview size. 3725 * 3726 * @return the maximum zoom value supported by the camera. 3727 */ 3728 public int getMaxZoom() { 3729 return getInt(KEY_MAX_ZOOM, 0); 3730 } 3731 3732 /** 3733 * Gets the zoom ratios of all zoom values. Applications should check 3734 * {@link #isZoomSupported} before using this method. 3735 * 3736 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3737 * returned as 320. The number of elements is {@link 3738 * #getMaxZoom} + 1. The list is sorted from small to large. The 3739 * first element is always 100. The last element is the zoom 3740 * ratio of the maximum zoom value. 3741 */ 3742 public List<Integer> getZoomRatios() { 3743 return splitInt(get(KEY_ZOOM_RATIOS)); 3744 } 3745 3746 /** 3747 * Returns true if smooth zoom is supported. Applications should call 3748 * this before using other smooth zoom methods. 3749 * 3750 * @return true if smooth zoom is supported. 3751 */ 3752 public boolean isSmoothZoomSupported() { 3753 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3754 return TRUE.equals(str); 3755 } 3756 3757 /** 3758 * <p>Gets the distances from the camera to where an object appears to be 3759 * in focus. The object is sharpest at the optimal focus distance. The 3760 * depth of field is the far focus distance minus near focus distance.</p> 3761 * 3762 * <p>Focus distances may change after calling {@link 3763 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3764 * #startPreview()}. Applications can call {@link #getParameters()} 3765 * and this method anytime to get the latest focus distances. If the 3766 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3767 * from time to time.</p> 3768 * 3769 * <p>This method is intended to estimate the distance between the camera 3770 * and the subject. After autofocus, the subject distance may be within 3771 * near and far focus distance. However, the precision depends on the 3772 * camera hardware, autofocus algorithm, the focus area, and the scene. 3773 * The error can be large and it should be only used as a reference.</p> 3774 * 3775 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3776 * If the focus distance is infinity, the value will be 3777 * {@code Float.POSITIVE_INFINITY}.</p> 3778 * 3779 * @param output focus distances in meters. output must be a float 3780 * array with three elements. Near focus distance, optimal focus 3781 * distance, and far focus distance will be filled in the array. 3782 * @see #FOCUS_DISTANCE_NEAR_INDEX 3783 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3784 * @see #FOCUS_DISTANCE_FAR_INDEX 3785 */ 3786 public void getFocusDistances(float[] output) { 3787 if (output == null || output.length != 3) { 3788 throw new IllegalArgumentException( 3789 "output must be a float array with three elements."); 3790 } 3791 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3792 } 3793 3794 /** 3795 * Gets the maximum number of focus areas supported. This is the maximum 3796 * length of the list in {@link #setFocusAreas(List)} and 3797 * {@link #getFocusAreas()}. 3798 * 3799 * @return the maximum number of focus areas supported by the camera. 3800 * @see #getFocusAreas() 3801 */ 3802 public int getMaxNumFocusAreas() { 3803 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3804 } 3805 3806 /** 3807 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3808 * focus.</p> 3809 * 3810 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3811 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3812 * focus areas first. If the value is 0, focus area is not supported.</p> 3813 * 3814 * <p>Each focus area is a rectangle with specified weight. The direction 3815 * is relative to the sensor orientation, that is, what the sensor sees. 3816 * The direction is not affected by the rotation or mirroring of 3817 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3818 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3819 * (1000, 1000) is the lower right point. The width and height of focus 3820 * areas cannot be 0 or negative.</p> 3821 * 3822 * <p>The weight must range from 1 to 1000. The weight should be 3823 * interpreted as a per-pixel weight - all pixels in the area have the 3824 * specified weight. This means a small area with the same weight as a 3825 * larger area will have less influence on the focusing than the larger 3826 * area. Focus areas can partially overlap and the driver will add the 3827 * weights in the overlap region.</p> 3828 * 3829 * <p>A special case of a {@code null} focus area list means the driver is 3830 * free to select focus targets as it wants. For example, the driver may 3831 * use more signals to select focus areas and change them 3832 * dynamically. Apps can set the focus area list to {@code null} if they 3833 * want the driver to completely control focusing.</p> 3834 * 3835 * <p>Focus areas are relative to the current field of view 3836 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3837 * represents the top of the currently visible camera frame. The focus 3838 * area cannot be set to be outside the current field of view, even 3839 * when using zoom.</p> 3840 * 3841 * <p>Focus area only has effect if the current focus mode is 3842 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3843 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3844 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3845 * 3846 * @return a list of current focus areas 3847 */ 3848 public List<Area> getFocusAreas() { 3849 return splitArea(get(KEY_FOCUS_AREAS)); 3850 } 3851 3852 /** 3853 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3854 * 3855 * @param focusAreas the focus areas 3856 * @see #getFocusAreas() 3857 */ 3858 public void setFocusAreas(List<Area> focusAreas) { 3859 set(KEY_FOCUS_AREAS, focusAreas); 3860 } 3861 3862 /** 3863 * Gets the maximum number of metering areas supported. This is the 3864 * maximum length of the list in {@link #setMeteringAreas(List)} and 3865 * {@link #getMeteringAreas()}. 3866 * 3867 * @return the maximum number of metering areas supported by the camera. 3868 * @see #getMeteringAreas() 3869 */ 3870 public int getMaxNumMeteringAreas() { 3871 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3872 } 3873 3874 /** 3875 * <p>Gets the current metering areas. Camera driver uses these areas to 3876 * decide exposure.</p> 3877 * 3878 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3879 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3880 * metering areas first. If the value is 0, metering area is not 3881 * supported.</p> 3882 * 3883 * <p>Each metering area is a rectangle with specified weight. The 3884 * direction is relative to the sensor orientation, that is, what the 3885 * sensor sees. The direction is not affected by the rotation or 3886 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3887 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3888 * point. (1000, 1000) is the lower right point. The width and height of 3889 * metering areas cannot be 0 or negative.</p> 3890 * 3891 * <p>The weight must range from 1 to 1000, and represents a weight for 3892 * every pixel in the area. This means that a large metering area with 3893 * the same weight as a smaller area will have more effect in the 3894 * metering result. Metering areas can partially overlap and the driver 3895 * will add the weights in the overlap region.</p> 3896 * 3897 * <p>A special case of a {@code null} metering area list means the driver 3898 * is free to meter as it chooses. For example, the driver may use more 3899 * signals to select metering areas and change them dynamically. Apps 3900 * can set the metering area list to {@code null} if they want the 3901 * driver to completely control metering.</p> 3902 * 3903 * <p>Metering areas are relative to the current field of view 3904 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3905 * represents the top of the currently visible camera frame. The 3906 * metering area cannot be set to be outside the current field of view, 3907 * even when using zoom.</p> 3908 * 3909 * <p>No matter what metering areas are, the final exposure are compensated 3910 * by {@link #setExposureCompensation(int)}.</p> 3911 * 3912 * @return a list of current metering areas 3913 */ 3914 public List<Area> getMeteringAreas() { 3915 return splitArea(get(KEY_METERING_AREAS)); 3916 } 3917 3918 /** 3919 * Sets metering areas. See {@link #getMeteringAreas()} for 3920 * documentation. 3921 * 3922 * @param meteringAreas the metering areas 3923 * @see #getMeteringAreas() 3924 */ 3925 public void setMeteringAreas(List<Area> meteringAreas) { 3926 set(KEY_METERING_AREAS, meteringAreas); 3927 } 3928 3929 /** 3930 * Gets the maximum number of detected faces supported. This is the 3931 * maximum length of the list returned from {@link FaceDetectionListener}. 3932 * If the return value is 0, face detection of the specified type is not 3933 * supported. 3934 * 3935 * @return the maximum number of detected face supported by the camera. 3936 * @see #startFaceDetection() 3937 */ 3938 public int getMaxNumDetectedFaces() { 3939 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3940 } 3941 3942 /** 3943 * Sets recording mode hint. This tells the camera that the intent of 3944 * the application is to record videos {@link 3945 * android.media.MediaRecorder#start()}, not to take still pictures 3946 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3947 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3948 * allow MediaRecorder.start() to start faster or with fewer glitches on 3949 * output. This should be called before starting preview for the best 3950 * result, but can be changed while the preview is active. The default 3951 * value is false. 3952 * 3953 * The app can still call takePicture() when the hint is true or call 3954 * MediaRecorder.start() when the hint is false. But the performance may 3955 * be worse. 3956 * 3957 * @param hint true if the apps intend to record videos using 3958 * {@link android.media.MediaRecorder}. 3959 */ 3960 public void setRecordingHint(boolean hint) { 3961 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3962 } 3963 3964 /** 3965 * <p>Returns true if video snapshot is supported. That is, applications 3966 * can call {@link #takePicture(Camera.ShutterCallback, 3967 * Camera.PictureCallback, Camera.PictureCallback, 3968 * Camera.PictureCallback)} during recording. Applications do not need 3969 * to call {@link #startPreview()} after taking a picture. The preview 3970 * will be still active. Other than that, taking a picture during 3971 * recording is identical to taking a picture normally. All settings and 3972 * methods related to takePicture work identically. Ex: 3973 * {@link #getPictureSize()}, {@link #getSupportedPictureSizes()}, 3974 * {@link #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 3975 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and 3976 * {@link #FLASH_MODE_ON} also still work, but the video will record the 3977 * flash.</p> 3978 * 3979 * <p>Applications can set shutter callback as null to avoid the shutter 3980 * sound. It is also recommended to set raw picture and post view 3981 * callbacks to null to avoid the interrupt of preview display.</p> 3982 * 3983 * <p>Field-of-view of the recorded video may be different from that of the 3984 * captured pictures. The maximum size of a video snapshot may be 3985 * smaller than that for regular still captures. If the current picture 3986 * size is set higher than can be supported by video snapshot, the 3987 * picture will be captured at the maximum supported size instead.</p> 3988 * 3989 * @return true if video snapshot is supported. 3990 */ 3991 public boolean isVideoSnapshotSupported() { 3992 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 3993 return TRUE.equals(str); 3994 } 3995 3996 /** 3997 * <p>Enables and disables video stabilization. Use 3998 * {@link #isVideoStabilizationSupported} to determine if calling this 3999 * method is valid.</p> 4000 * 4001 * <p>Video stabilization reduces the shaking due to the motion of the 4002 * camera in both the preview stream and in recorded videos, including 4003 * data received from the preview callback. It does not reduce motion 4004 * blur in images captured with 4005 * {@link Camera#takePicture takePicture}.</p> 4006 * 4007 * <p>Video stabilization can be enabled and disabled while preview or 4008 * recording is active, but toggling it may cause a jump in the video 4009 * stream that may be undesirable in a recorded video.</p> 4010 * 4011 * @param toggle Set to true to enable video stabilization, and false to 4012 * disable video stabilization. 4013 * @see #isVideoStabilizationSupported() 4014 * @see #getVideoStabilization() 4015 */ 4016 public void setVideoStabilization(boolean toggle) { 4017 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 4018 } 4019 4020 /** 4021 * Get the current state of video stabilization. See 4022 * {@link #setVideoStabilization} for details of video stabilization. 4023 * 4024 * @return true if video stabilization is enabled 4025 * @see #isVideoStabilizationSupported() 4026 * @see #setVideoStabilization(boolean) 4027 */ 4028 public boolean getVideoStabilization() { 4029 String str = get(KEY_VIDEO_STABILIZATION); 4030 return TRUE.equals(str); 4031 } 4032 4033 /** 4034 * Returns true if video stabilization is supported. See 4035 * {@link #setVideoStabilization} for details of video stabilization. 4036 * 4037 * @return true if video stabilization is supported 4038 * @see #setVideoStabilization(boolean) 4039 * @see #getVideoStabilization() 4040 */ 4041 public boolean isVideoStabilizationSupported() { 4042 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 4043 return TRUE.equals(str); 4044 } 4045 4046 // Splits a comma delimited string to an ArrayList of String. 4047 // Return null if the passing string is null or the size is 0. 4048 private ArrayList<String> split(String str) { 4049 if (str == null) return null; 4050 4051 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4052 splitter.setString(str); 4053 ArrayList<String> substrings = new ArrayList<String>(); 4054 for (String s : splitter) { 4055 substrings.add(s); 4056 } 4057 return substrings; 4058 } 4059 4060 // Splits a comma delimited string to an ArrayList of Integer. 4061 // Return null if the passing string is null or the size is 0. 4062 private ArrayList<Integer> splitInt(String str) { 4063 if (str == null) return null; 4064 4065 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4066 splitter.setString(str); 4067 ArrayList<Integer> substrings = new ArrayList<Integer>(); 4068 for (String s : splitter) { 4069 substrings.add(Integer.parseInt(s)); 4070 } 4071 if (substrings.size() == 0) return null; 4072 return substrings; 4073 } 4074 4075 private void splitInt(String str, int[] output) { 4076 if (str == null) return; 4077 4078 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4079 splitter.setString(str); 4080 int index = 0; 4081 for (String s : splitter) { 4082 output[index++] = Integer.parseInt(s); 4083 } 4084 } 4085 4086 // Splits a comma delimited string to an ArrayList of Float. 4087 private void splitFloat(String str, float[] output) { 4088 if (str == null) return; 4089 4090 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4091 splitter.setString(str); 4092 int index = 0; 4093 for (String s : splitter) { 4094 output[index++] = Float.parseFloat(s); 4095 } 4096 } 4097 4098 // Returns the value of a float parameter. 4099 private float getFloat(String key, float defaultValue) { 4100 try { 4101 return Float.parseFloat(mMap.get(key)); 4102 } catch (NumberFormatException ex) { 4103 return defaultValue; 4104 } 4105 } 4106 4107 // Returns the value of a integer parameter. 4108 private int getInt(String key, int defaultValue) { 4109 try { 4110 return Integer.parseInt(mMap.get(key)); 4111 } catch (NumberFormatException ex) { 4112 return defaultValue; 4113 } 4114 } 4115 4116 // Splits a comma delimited string to an ArrayList of Size. 4117 // Return null if the passing string is null or the size is 0. 4118 private ArrayList<Size> splitSize(String str) { 4119 if (str == null) return null; 4120 4121 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4122 splitter.setString(str); 4123 ArrayList<Size> sizeList = new ArrayList<Size>(); 4124 for (String s : splitter) { 4125 Size size = strToSize(s); 4126 if (size != null) sizeList.add(size); 4127 } 4128 if (sizeList.size() == 0) return null; 4129 return sizeList; 4130 } 4131 4132 // Parses a string (ex: "480x320") to Size object. 4133 // Return null if the passing string is null. 4134 private Size strToSize(String str) { 4135 if (str == null) return null; 4136 4137 int pos = str.indexOf('x'); 4138 if (pos != -1) { 4139 String width = str.substring(0, pos); 4140 String height = str.substring(pos + 1); 4141 return new Size(Integer.parseInt(width), 4142 Integer.parseInt(height)); 4143 } 4144 Log.e(TAG, "Invalid size parameter string=" + str); 4145 return null; 4146 } 4147 4148 // Splits a comma delimited string to an ArrayList of int array. 4149 // Example string: "(10000,26623),(10000,30000)". Return null if the 4150 // passing string is null or the size is 0. 4151 private ArrayList<int[]> splitRange(String str) { 4152 if (str == null || str.charAt(0) != '(' 4153 || str.charAt(str.length() - 1) != ')') { 4154 Log.e(TAG, "Invalid range list string=" + str); 4155 return null; 4156 } 4157 4158 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 4159 int endIndex, fromIndex = 1; 4160 do { 4161 int[] range = new int[2]; 4162 endIndex = str.indexOf("),(", fromIndex); 4163 if (endIndex == -1) endIndex = str.length() - 1; 4164 splitInt(str.substring(fromIndex, endIndex), range); 4165 rangeList.add(range); 4166 fromIndex = endIndex + 3; 4167 } while (endIndex != str.length() - 1); 4168 4169 if (rangeList.size() == 0) return null; 4170 return rangeList; 4171 } 4172 4173 // Splits a comma delimited string to an ArrayList of Area objects. 4174 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 4175 // the passing string is null or the size is 0 or (0,0,0,0,0). 4176 private ArrayList<Area> splitArea(String str) { 4177 if (str == null || str.charAt(0) != '(' 4178 || str.charAt(str.length() - 1) != ')') { 4179 Log.e(TAG, "Invalid area string=" + str); 4180 return null; 4181 } 4182 4183 ArrayList<Area> result = new ArrayList<Area>(); 4184 int endIndex, fromIndex = 1; 4185 int[] array = new int[5]; 4186 do { 4187 endIndex = str.indexOf("),(", fromIndex); 4188 if (endIndex == -1) endIndex = str.length() - 1; 4189 splitInt(str.substring(fromIndex, endIndex), array); 4190 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 4191 result.add(new Area(rect, array[4])); 4192 fromIndex = endIndex + 3; 4193 } while (endIndex != str.length() - 1); 4194 4195 if (result.size() == 0) return null; 4196 4197 if (result.size() == 1) { 4198 Area area = result.get(0); 4199 Rect rect = area.rect; 4200 if (rect.left == 0 && rect.top == 0 && rect.right == 0 4201 && rect.bottom == 0 && area.weight == 0) { 4202 return null; 4203 } 4204 } 4205 4206 return result; 4207 } 4208 4209 private boolean same(String s1, String s2) { 4210 if (s1 == null && s2 == null) return true; 4211 if (s1 != null && s1.equals(s2)) return true; 4212 return false; 4213 } 4214 }; 4215} 4216