Camera.java revision 08c7116ab9cd04ad6dd3c04aa1017237e7f409ac
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 50/** 51 * The Camera class is used to set image capture settings, start/stop preview, 52 * snap pictures, and retrieve frames for encoding for video. This class is a 53 * client for the Camera service, which manages the actual camera hardware. 54 * 55 * <p>To access the device camera, you must declare the 56 * {@link android.Manifest.permission#CAMERA} permission in your Android 57 * Manifest. Also be sure to include the 58 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 59 * manifest element to declare camera features used by your application. 60 * For example, if you use the camera and auto-focus feature, your Manifest 61 * should include the following:</p> 62 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 63 * <uses-feature android:name="android.hardware.camera" /> 64 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 65 * 66 * <p>To take pictures with this class, use the following steps:</p> 67 * 68 * <ol> 69 * <li>Obtain an instance of Camera from {@link #open(int)}. 70 * 71 * <li>Get existing (default) settings with {@link #getParameters()}. 72 * 73 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 74 * {@link #setParameters(Camera.Parameters)}. 75 * 76 * <li>If desired, call {@link #setDisplayOrientation(int)}. 77 * 78 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 79 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 80 * will be unable to start the preview. 81 * 82 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 83 * preview surface. Preview must be started before you can take a picture. 84 * 85 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 86 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 87 * capture a photo. Wait for the callbacks to provide the actual image data. 88 * 89 * <li>After taking a picture, preview display will have stopped. To take more 90 * photos, call {@link #startPreview()} again first. 91 * 92 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 93 * 94 * <li><b>Important:</b> Call {@link #release()} to release the camera for 95 * use by other applications. Applications should release the camera 96 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 97 * it in {@link android.app.Activity#onResume()}). 98 * </ol> 99 * 100 * <p>To quickly switch to video recording mode, use these steps:</p> 101 * 102 * <ol> 103 * <li>Obtain and initialize a Camera and start preview as described above. 104 * 105 * <li>Call {@link #unlock()} to allow the media process to access the camera. 106 * 107 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 108 * See {@link android.media.MediaRecorder} information about video recording. 109 * 110 * <li>When finished recording, call {@link #reconnect()} to re-acquire 111 * and re-lock the camera. 112 * 113 * <li>If desired, restart preview and take more photos or videos. 114 * 115 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 116 * </ol> 117 * 118 * <p>This class is not thread-safe, and is meant for use from one event thread. 119 * Most long-running operations (preview, focus, photo capture, etc) happen 120 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 121 * on the event thread {@link #open(int)} was called from. This class's methods 122 * must never be called from multiple threads at once.</p> 123 * 124 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 125 * may have different hardware specifications, such as megapixel ratings and 126 * auto-focus capabilities. In order for your application to be compatible with 127 * more devices, you should not make assumptions about the device camera 128 * specifications.</p> 129 * 130 * <div class="special reference"> 131 * <h3>Developer Guides</h3> 132 * <p>For more information about using cameras, read the 133 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 134 * </div> 135 * 136 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 137 * applications. 138 */ 139@Deprecated 140public class Camera { 141 private static final String TAG = "Camera"; 142 143 // These match the enums in frameworks/base/include/camera/Camera.h 144 private static final int CAMERA_MSG_ERROR = 0x001; 145 private static final int CAMERA_MSG_SHUTTER = 0x002; 146 private static final int CAMERA_MSG_FOCUS = 0x004; 147 private static final int CAMERA_MSG_ZOOM = 0x008; 148 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 149 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 150 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 151 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 152 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 153 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 154 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 155 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 156 157 private long mNativeContext; // accessed by native methods 158 private EventHandler mEventHandler; 159 private ShutterCallback mShutterCallback; 160 private PictureCallback mRawImageCallback; 161 private PictureCallback mJpegCallback; 162 private PreviewCallback mPreviewCallback; 163 private boolean mUsingPreviewAllocation; 164 private PictureCallback mPostviewCallback; 165 private AutoFocusCallback mAutoFocusCallback; 166 private AutoFocusMoveCallback mAutoFocusMoveCallback; 167 private OnZoomChangeListener mZoomListener; 168 private FaceDetectionListener mFaceListener; 169 private ErrorCallback mErrorCallback; 170 private boolean mOneShot; 171 private boolean mWithBuffer; 172 private boolean mFaceDetectionRunning = false; 173 private final Object mAutoFocusCallbackLock = new Object(); 174 175 private static final int NO_ERROR = 0; 176 private static final int EACCESS = -13; 177 private static final int ENODEV = -19; 178 private static final int EBUSY = -16; 179 private static final int EINVAL = -22; 180 private static final int ENOSYS = -38; 181 private static final int EUSERS = -87; 182 private static final int EOPNOTSUPP = -95; 183 184 /** 185 * Broadcast Action: A new picture is taken by the camera, and the entry of 186 * the picture has been added to the media store. 187 * {@link android.content.Intent#getData} is URI of the picture. 188 */ 189 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 190 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 191 192 /** 193 * Broadcast Action: A new video is recorded by the camera, and the entry 194 * of the video has been added to the media store. 195 * {@link android.content.Intent#getData} is URI of the video. 196 */ 197 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 198 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 199 200 /** 201 * Camera HAL device API version 1.0 202 * @hide 203 */ 204 public static final int CAMERA_HAL_API_VERSION_1_0 = 0x100; 205 206 /** 207 * A constant meaning the normal camera connect/open will be used. 208 */ 209 private static final int CAMERA_HAL_API_VERSION_NORMAL_CONNECT = -2; 210 211 /** 212 * Used to indicate HAL version un-specified. 213 */ 214 private static final int CAMERA_HAL_API_VERSION_UNSPECIFIED = -1; 215 216 /** 217 * Hardware face detection. It does not use much CPU. 218 */ 219 private static final int CAMERA_FACE_DETECTION_HW = 0; 220 221 /** 222 * Software face detection. It uses some CPU. 223 */ 224 private static final int CAMERA_FACE_DETECTION_SW = 1; 225 226 /** 227 * Returns the number of physical cameras available on this device. 228 */ 229 public native static int getNumberOfCameras(); 230 231 /** 232 * Returns the information about a particular camera. 233 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 234 */ 235 public static void getCameraInfo(int cameraId, CameraInfo cameraInfo) { 236 _getCameraInfo(cameraId, cameraInfo); 237 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 238 IAudioService audioService = IAudioService.Stub.asInterface(b); 239 try { 240 if (audioService.isCameraSoundForced()) { 241 // Only set this when sound is forced; otherwise let native code 242 // decide. 243 cameraInfo.canDisableShutterSound = false; 244 } 245 } catch (RemoteException e) { 246 Log.e(TAG, "Audio service is unavailable for queries"); 247 } 248 } 249 private native static void _getCameraInfo(int cameraId, CameraInfo cameraInfo); 250 251 /** 252 * Information about a camera 253 * 254 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 255 * applications. 256 */ 257 @Deprecated 258 public static class CameraInfo { 259 /** 260 * The facing of the camera is opposite to that of the screen. 261 */ 262 public static final int CAMERA_FACING_BACK = 0; 263 264 /** 265 * The facing of the camera is the same as that of the screen. 266 */ 267 public static final int CAMERA_FACING_FRONT = 1; 268 269 /** 270 * The direction that the camera faces. It should be 271 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 272 */ 273 public int facing; 274 275 /** 276 * <p>The orientation of the camera image. The value is the angle that the 277 * camera image needs to be rotated clockwise so it shows correctly on 278 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 279 * 280 * <p>For example, suppose a device has a naturally tall screen. The 281 * back-facing camera sensor is mounted in landscape. You are looking at 282 * the screen. If the top side of the camera sensor is aligned with the 283 * right edge of the screen in natural orientation, the value should be 284 * 90. If the top side of a front-facing camera sensor is aligned with 285 * the right of the screen, the value should be 270.</p> 286 * 287 * @see #setDisplayOrientation(int) 288 * @see Parameters#setRotation(int) 289 * @see Parameters#setPreviewSize(int, int) 290 * @see Parameters#setPictureSize(int, int) 291 * @see Parameters#setJpegThumbnailSize(int, int) 292 */ 293 public int orientation; 294 295 /** 296 * <p>Whether the shutter sound can be disabled.</p> 297 * 298 * <p>On some devices, the camera shutter sound cannot be turned off 299 * through {@link #enableShutterSound enableShutterSound}. This field 300 * can be used to determine whether a call to disable the shutter sound 301 * will succeed.</p> 302 * 303 * <p>If this field is set to true, then a call of 304 * {@code enableShutterSound(false)} will be successful. If set to 305 * false, then that call will fail, and the shutter sound will be played 306 * when {@link Camera#takePicture takePicture} is called.</p> 307 */ 308 public boolean canDisableShutterSound; 309 }; 310 311 /** 312 * Creates a new Camera object to access a particular hardware camera. If 313 * the same camera is opened by other applications, this will throw a 314 * RuntimeException. 315 * 316 * <p>You must call {@link #release()} when you are done using the camera, 317 * otherwise it will remain locked and be unavailable to other applications. 318 * 319 * <p>Your application should only have one Camera object active at a time 320 * for a particular hardware camera. 321 * 322 * <p>Callbacks from other methods are delivered to the event loop of the 323 * thread which called open(). If this thread has no event loop, then 324 * callbacks are delivered to the main application event loop. If there 325 * is no main application event loop, callbacks are not delivered. 326 * 327 * <p class="caution"><b>Caution:</b> On some devices, this method may 328 * take a long time to complete. It is best to call this method from a 329 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 330 * blocking the main application UI thread. 331 * 332 * @param cameraId the hardware camera to access, between 0 and 333 * {@link #getNumberOfCameras()}-1. 334 * @return a new Camera object, connected, locked and ready for use. 335 * @throws RuntimeException if opening the camera fails (for example, if the 336 * camera is in use by another process or device policy manager has 337 * disabled the camera). 338 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 339 */ 340 public static Camera open(int cameraId) { 341 return new Camera(cameraId); 342 } 343 344 /** 345 * Creates a new Camera object to access the first back-facing camera on the 346 * device. If the device does not have a back-facing camera, this returns 347 * null. 348 * @see #open(int) 349 */ 350 public static Camera open() { 351 int numberOfCameras = getNumberOfCameras(); 352 CameraInfo cameraInfo = new CameraInfo(); 353 for (int i = 0; i < numberOfCameras; i++) { 354 getCameraInfo(i, cameraInfo); 355 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 356 return new Camera(i); 357 } 358 } 359 return null; 360 } 361 362 /** 363 * Creates a new Camera object to access a particular hardware camera with 364 * given hal API version. If the same camera is opened by other applications 365 * or the hal API version is not supported by this device, this will throw a 366 * RuntimeException. 367 * <p> 368 * You must call {@link #release()} when you are done using the camera, 369 * otherwise it will remain locked and be unavailable to other applications. 370 * <p> 371 * Your application should only have one Camera object active at a time for 372 * a particular hardware camera. 373 * <p> 374 * Callbacks from other methods are delivered to the event loop of the 375 * thread which called open(). If this thread has no event loop, then 376 * callbacks are delivered to the main application event loop. If there is 377 * no main application event loop, callbacks are not delivered. 378 * <p class="caution"> 379 * <b>Caution:</b> On some devices, this method may take a long time to 380 * complete. It is best to call this method from a worker thread (possibly 381 * using {@link android.os.AsyncTask}) to avoid blocking the main 382 * application UI thread. 383 * 384 * @param cameraId The hardware camera to access, between 0 and 385 * {@link #getNumberOfCameras()}-1. 386 * @param halVersion The HAL API version this camera device to be opened as. 387 * @return a new Camera object, connected, locked and ready for use. 388 * 389 * @throws IllegalArgumentException if the {@code halVersion} is invalid 390 * 391 * @throws RuntimeException if opening the camera fails (for example, if the 392 * camera is in use by another process or device policy manager has disabled 393 * the camera). 394 * 395 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 396 * @see #CAMERA_HAL_API_VERSION_1_0 397 * 398 * @hide 399 */ 400 public static Camera openLegacy(int cameraId, int halVersion) { 401 if (halVersion < CAMERA_HAL_API_VERSION_1_0) { 402 throw new IllegalArgumentException("Invalid HAL version " + halVersion); 403 } 404 405 return new Camera(cameraId, halVersion); 406 } 407 408 /** 409 * Create a legacy camera object. 410 * 411 * @param cameraId The hardware camera to access, between 0 and 412 * {@link #getNumberOfCameras()}-1. 413 * @param halVersion The HAL API version this camera device to be opened as. 414 */ 415 private Camera(int cameraId, int halVersion) { 416 int err = cameraInitVersion(cameraId, halVersion); 417 if (checkInitErrors(err)) { 418 switch(err) { 419 case EACCESS: 420 throw new RuntimeException("Fail to connect to camera service"); 421 case ENODEV: 422 throw new RuntimeException("Camera initialization failed"); 423 case ENOSYS: 424 throw new RuntimeException("Camera initialization failed because some methods" 425 + " are not implemented"); 426 case EOPNOTSUPP: 427 throw new RuntimeException("Camera initialization failed because the hal" 428 + " version is not supported by this device"); 429 case EINVAL: 430 throw new RuntimeException("Camera initialization failed because the input" 431 + " arugments are invalid"); 432 case EBUSY: 433 throw new RuntimeException("Camera initialization failed because the camera" 434 + " device was already opened"); 435 case EUSERS: 436 throw new RuntimeException("Camera initialization failed because the max" 437 + " number of camera devices were already opened"); 438 default: 439 // Should never hit this. 440 throw new RuntimeException("Unknown camera error"); 441 } 442 } 443 } 444 445 private int cameraInitVersion(int cameraId, int halVersion) { 446 mShutterCallback = null; 447 mRawImageCallback = null; 448 mJpegCallback = null; 449 mPreviewCallback = null; 450 mPostviewCallback = null; 451 mUsingPreviewAllocation = false; 452 mZoomListener = null; 453 454 Looper looper; 455 if ((looper = Looper.myLooper()) != null) { 456 mEventHandler = new EventHandler(this, looper); 457 } else if ((looper = Looper.getMainLooper()) != null) { 458 mEventHandler = new EventHandler(this, looper); 459 } else { 460 mEventHandler = null; 461 } 462 463 String packageName = ActivityThread.currentPackageName(); 464 465 return native_setup(new WeakReference<Camera>(this), cameraId, halVersion, packageName); 466 } 467 468 private int cameraInitNormal(int cameraId) { 469 return cameraInitVersion(cameraId, CAMERA_HAL_API_VERSION_NORMAL_CONNECT); 470 } 471 472 /** 473 * Connect to the camera service using #connectLegacy 474 * 475 * <p> 476 * This acts the same as normal except that it will return 477 * the detailed error code if open fails instead of 478 * converting everything into {@code NO_INIT}.</p> 479 * 480 * <p>Intended to use by the camera2 shim only, do <i>not</i> use this for other code.</p> 481 * 482 * @return a detailed errno error code, or {@code NO_ERROR} on success 483 * 484 * @hide 485 */ 486 public int cameraInitUnspecified(int cameraId) { 487 return cameraInitVersion(cameraId, CAMERA_HAL_API_VERSION_UNSPECIFIED); 488 } 489 490 /** used by Camera#open, Camera#open(int) */ 491 Camera(int cameraId) { 492 int err = cameraInitNormal(cameraId); 493 if (checkInitErrors(err)) { 494 switch(err) { 495 case EACCESS: 496 throw new RuntimeException("Fail to connect to camera service"); 497 case ENODEV: 498 throw new RuntimeException("Camera initialization failed"); 499 default: 500 // Should never hit this. 501 throw new RuntimeException("Unknown camera error"); 502 } 503 } 504 } 505 506 507 /** 508 * @hide 509 */ 510 public static boolean checkInitErrors(int err) { 511 return err != NO_ERROR; 512 } 513 514 /** 515 * @hide 516 */ 517 public static Camera openUninitialized() { 518 return new Camera(); 519 } 520 521 /** 522 * An empty Camera for testing purpose. 523 */ 524 Camera() { 525 } 526 527 @Override 528 protected void finalize() { 529 release(); 530 } 531 532 private native final int native_setup(Object camera_this, int cameraId, int halVersion, 533 String packageName); 534 535 private native final void native_release(); 536 537 538 /** 539 * Disconnects and releases the Camera object resources. 540 * 541 * <p>You must call this as soon as you're done with the Camera object.</p> 542 */ 543 public final void release() { 544 native_release(); 545 mFaceDetectionRunning = false; 546 } 547 548 /** 549 * Unlocks the camera to allow another process to access it. 550 * Normally, the camera is locked to the process with an active Camera 551 * object until {@link #release()} is called. To allow rapid handoff 552 * between processes, you can call this method to release the camera 553 * temporarily for another process to use; once the other process is done 554 * you can call {@link #reconnect()} to reclaim the camera. 555 * 556 * <p>This must be done before calling 557 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 558 * called after recording starts. 559 * 560 * <p>If you are not recording video, you probably do not need this method. 561 * 562 * @throws RuntimeException if the camera cannot be unlocked. 563 */ 564 public native final void unlock(); 565 566 /** 567 * Re-locks the camera to prevent other processes from accessing it. 568 * Camera objects are locked by default unless {@link #unlock()} is 569 * called. Normally {@link #reconnect()} is used instead. 570 * 571 * <p>Since API level 14, camera is automatically locked for applications in 572 * {@link android.media.MediaRecorder#start()}. Applications can use the 573 * camera (ex: zoom) after recording starts. There is no need to call this 574 * after recording starts or stops. 575 * 576 * <p>If you are not recording video, you probably do not need this method. 577 * 578 * @throws RuntimeException if the camera cannot be re-locked (for 579 * example, if the camera is still in use by another process). 580 */ 581 public native final void lock(); 582 583 /** 584 * Reconnects to the camera service after another process used it. 585 * After {@link #unlock()} is called, another process may use the 586 * camera; when the process is done, you must reconnect to the camera, 587 * which will re-acquire the lock and allow you to continue using the 588 * camera. 589 * 590 * <p>Since API level 14, camera is automatically locked for applications in 591 * {@link android.media.MediaRecorder#start()}. Applications can use the 592 * camera (ex: zoom) after recording starts. There is no need to call this 593 * after recording starts or stops. 594 * 595 * <p>If you are not recording video, you probably do not need this method. 596 * 597 * @throws IOException if a connection cannot be re-established (for 598 * example, if the camera is still in use by another process). 599 */ 600 public native final void reconnect() throws IOException; 601 602 /** 603 * Sets the {@link Surface} to be used for live preview. 604 * Either a surface or surface texture is necessary for preview, and 605 * preview is necessary to take pictures. The same surface can be re-set 606 * without harm. Setting a preview surface will un-set any preview surface 607 * texture that was set via {@link #setPreviewTexture}. 608 * 609 * <p>The {@link SurfaceHolder} must already contain a surface when this 610 * method is called. If you are using {@link android.view.SurfaceView}, 611 * you will need to register a {@link SurfaceHolder.Callback} with 612 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 613 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 614 * calling setPreviewDisplay() or starting preview. 615 * 616 * <p>This method must be called before {@link #startPreview()}. The 617 * one exception is that if the preview surface is not set (or set to null) 618 * before startPreview() is called, then this method may be called once 619 * with a non-null parameter to set the preview surface. (This allows 620 * camera setup and surface creation to happen in parallel, saving time.) 621 * The preview surface may not otherwise change while preview is running. 622 * 623 * @param holder containing the Surface on which to place the preview, 624 * or null to remove the preview surface 625 * @throws IOException if the method fails (for example, if the surface 626 * is unavailable or unsuitable). 627 */ 628 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 629 if (holder != null) { 630 setPreviewSurface(holder.getSurface()); 631 } else { 632 setPreviewSurface((Surface)null); 633 } 634 } 635 636 /** 637 * @hide 638 */ 639 public native final void setPreviewSurface(Surface surface) throws IOException; 640 641 /** 642 * Sets the {@link SurfaceTexture} to be used for live preview. 643 * Either a surface or surface texture is necessary for preview, and 644 * preview is necessary to take pictures. The same surface texture can be 645 * re-set without harm. Setting a preview surface texture will un-set any 646 * preview surface that was set via {@link #setPreviewDisplay}. 647 * 648 * <p>This method must be called before {@link #startPreview()}. The 649 * one exception is that if the preview surface texture is not set (or set 650 * to null) before startPreview() is called, then this method may be called 651 * once with a non-null parameter to set the preview surface. (This allows 652 * camera setup and surface creation to happen in parallel, saving time.) 653 * The preview surface texture may not otherwise change while preview is 654 * running. 655 * 656 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 657 * SurfaceTexture set as the preview texture have an unspecified zero point, 658 * and cannot be directly compared between different cameras or different 659 * instances of the same camera, or across multiple runs of the same 660 * program. 661 * 662 * <p>If you are using the preview data to create video or still images, 663 * strongly consider using {@link android.media.MediaActionSound} to 664 * properly indicate image capture or recording start/stop to the user.</p> 665 * 666 * @see android.media.MediaActionSound 667 * @see android.graphics.SurfaceTexture 668 * @see android.view.TextureView 669 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 670 * images are to be sent or null to remove the current preview surface 671 * texture 672 * @throws IOException if the method fails (for example, if the surface 673 * texture is unavailable or unsuitable). 674 */ 675 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 676 677 /** 678 * Callback interface used to deliver copies of preview frames as 679 * they are displayed. 680 * 681 * @see #setPreviewCallback(Camera.PreviewCallback) 682 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 683 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 684 * @see #startPreview() 685 * 686 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 687 * applications. 688 */ 689 @Deprecated 690 public interface PreviewCallback 691 { 692 /** 693 * Called as preview frames are displayed. This callback is invoked 694 * on the event thread {@link #open(int)} was called from. 695 * 696 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, 697 * refer to the equations in {@link Camera.Parameters#setPreviewFormat} 698 * for the arrangement of the pixel data in the preview callback 699 * buffers. 700 * 701 * @param data the contents of the preview frame in the format defined 702 * by {@link android.graphics.ImageFormat}, which can be queried 703 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 704 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 705 * is never called, the default will be the YCbCr_420_SP 706 * (NV21) format. 707 * @param camera the Camera service object. 708 */ 709 void onPreviewFrame(byte[] data, Camera camera); 710 }; 711 712 /** 713 * Starts capturing and drawing preview frames to the screen. 714 * Preview will not actually start until a surface is supplied 715 * with {@link #setPreviewDisplay(SurfaceHolder)} or 716 * {@link #setPreviewTexture(SurfaceTexture)}. 717 * 718 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 719 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 720 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 721 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 722 * will be called when preview data becomes available. 723 */ 724 public native final void startPreview(); 725 726 /** 727 * Stops capturing and drawing preview frames to the surface, and 728 * resets the camera for a future call to {@link #startPreview()}. 729 */ 730 public final void stopPreview() { 731 _stopPreview(); 732 mFaceDetectionRunning = false; 733 734 mShutterCallback = null; 735 mRawImageCallback = null; 736 mPostviewCallback = null; 737 mJpegCallback = null; 738 synchronized (mAutoFocusCallbackLock) { 739 mAutoFocusCallback = null; 740 } 741 mAutoFocusMoveCallback = null; 742 } 743 744 private native final void _stopPreview(); 745 746 /** 747 * Return current preview state. 748 * 749 * FIXME: Unhide before release 750 * @hide 751 */ 752 public native final boolean previewEnabled(); 753 754 /** 755 * <p>Installs a callback to be invoked for every preview frame in addition 756 * to displaying them on the screen. The callback will be repeatedly called 757 * for as long as preview is active. This method can be called at any time, 758 * even while preview is live. Any other preview callbacks are 759 * overridden.</p> 760 * 761 * <p>If you are using the preview data to create video or still images, 762 * strongly consider using {@link android.media.MediaActionSound} to 763 * properly indicate image capture or recording start/stop to the user.</p> 764 * 765 * @param cb a callback object that receives a copy of each preview frame, 766 * or null to stop receiving callbacks. 767 * @see android.media.MediaActionSound 768 */ 769 public final void setPreviewCallback(PreviewCallback cb) { 770 mPreviewCallback = cb; 771 mOneShot = false; 772 mWithBuffer = false; 773 if (cb != null) { 774 mUsingPreviewAllocation = false; 775 } 776 // Always use one-shot mode. We fake camera preview mode by 777 // doing one-shot preview continuously. 778 setHasPreviewCallback(cb != null, false); 779 } 780 781 /** 782 * <p>Installs a callback to be invoked for the next preview frame in 783 * addition to displaying it on the screen. After one invocation, the 784 * callback is cleared. This method can be called any time, even when 785 * preview is live. Any other preview callbacks are overridden.</p> 786 * 787 * <p>If you are using the preview data to create video or still images, 788 * strongly consider using {@link android.media.MediaActionSound} to 789 * properly indicate image capture or recording start/stop to the user.</p> 790 * 791 * @param cb a callback object that receives a copy of the next preview frame, 792 * or null to stop receiving callbacks. 793 * @see android.media.MediaActionSound 794 */ 795 public final void setOneShotPreviewCallback(PreviewCallback cb) { 796 mPreviewCallback = cb; 797 mOneShot = true; 798 mWithBuffer = false; 799 if (cb != null) { 800 mUsingPreviewAllocation = false; 801 } 802 setHasPreviewCallback(cb != null, false); 803 } 804 805 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 806 807 /** 808 * <p>Installs a callback to be invoked for every preview frame, using 809 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 810 * displaying them on the screen. The callback will be repeatedly called 811 * for as long as preview is active and buffers are available. Any other 812 * preview callbacks are overridden.</p> 813 * 814 * <p>The purpose of this method is to improve preview efficiency and frame 815 * rate by allowing preview frame memory reuse. You must call 816 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 817 * calling this method -- or no callbacks will received.</p> 818 * 819 * <p>The buffer queue will be cleared if this method is called with a null 820 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 821 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 822 * called.</p> 823 * 824 * <p>If you are using the preview data to create video or still images, 825 * strongly consider using {@link android.media.MediaActionSound} to 826 * properly indicate image capture or recording start/stop to the user.</p> 827 * 828 * @param cb a callback object that receives a copy of the preview frame, 829 * or null to stop receiving callbacks and clear the buffer queue. 830 * @see #addCallbackBuffer(byte[]) 831 * @see android.media.MediaActionSound 832 */ 833 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 834 mPreviewCallback = cb; 835 mOneShot = false; 836 mWithBuffer = true; 837 if (cb != null) { 838 mUsingPreviewAllocation = false; 839 } 840 setHasPreviewCallback(cb != null, true); 841 } 842 843 /** 844 * Adds a pre-allocated buffer to the preview callback buffer queue. 845 * Applications can add one or more buffers to the queue. When a preview 846 * frame arrives and there is still at least one available buffer, the 847 * buffer will be used and removed from the queue. Then preview callback is 848 * invoked with the buffer. If a frame arrives and there is no buffer left, 849 * the frame is discarded. Applications should add buffers back when they 850 * finish processing the data in them. 851 * 852 * <p>For formats besides YV12, the size of the buffer is determined by 853 * multiplying the preview image width, height, and bytes per pixel. The 854 * width and height can be read from 855 * {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel can be 856 * computed from {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 857 * 8, using the image format from 858 * {@link Camera.Parameters#getPreviewFormat()}. 859 * 860 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, the 861 * size can be calculated using the equations listed in 862 * {@link Camera.Parameters#setPreviewFormat}. 863 * 864 * <p>This method is only necessary when 865 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 866 * {@link #setPreviewCallback(PreviewCallback)} or 867 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 868 * are automatically allocated. When a supplied buffer is too small to 869 * hold the preview frame data, preview callback will return null and 870 * the buffer will be removed from the buffer queue. 871 * 872 * @param callbackBuffer the buffer to add to the queue. The size of the 873 * buffer must match the values described above. 874 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 875 */ 876 public final void addCallbackBuffer(byte[] callbackBuffer) 877 { 878 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 879 } 880 881 /** 882 * Adds a pre-allocated buffer to the raw image callback buffer queue. 883 * Applications can add one or more buffers to the queue. When a raw image 884 * frame arrives and there is still at least one available buffer, the 885 * buffer will be used to hold the raw image data and removed from the 886 * queue. Then raw image callback is invoked with the buffer. If a raw 887 * image frame arrives but there is no buffer left, the frame is 888 * discarded. Applications should add buffers back when they finish 889 * processing the data in them by calling this method again in order 890 * to avoid running out of raw image callback buffers. 891 * 892 * <p>The size of the buffer is determined by multiplying the raw image 893 * width, height, and bytes per pixel. The width and height can be 894 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 895 * can be computed from 896 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 897 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 898 * 899 * <p>This method is only necessary when the PictureCallbck for raw image 900 * is used while calling {@link #takePicture(Camera.ShutterCallback, 901 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 902 * 903 * <p>Please note that by calling this method, the mode for 904 * application-managed callback buffers is triggered. If this method has 905 * never been called, null will be returned by the raw image callback since 906 * there is no image callback buffer available. Furthermore, When a supplied 907 * buffer is too small to hold the raw image data, raw image callback will 908 * return null and the buffer will be removed from the buffer queue. 909 * 910 * @param callbackBuffer the buffer to add to the raw image callback buffer 911 * queue. The size should be width * height * (bits per pixel) / 8. An 912 * null callbackBuffer will be ignored and won't be added to the queue. 913 * 914 * @see #takePicture(Camera.ShutterCallback, 915 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 916 * 917 * {@hide} 918 */ 919 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 920 { 921 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 922 } 923 924 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 925 { 926 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 927 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 928 msgType != CAMERA_MSG_RAW_IMAGE) { 929 throw new IllegalArgumentException( 930 "Unsupported message type: " + msgType); 931 } 932 933 _addCallbackBuffer(callbackBuffer, msgType); 934 } 935 936 private native final void _addCallbackBuffer( 937 byte[] callbackBuffer, int msgType); 938 939 /** 940 * <p>Create a {@link android.renderscript RenderScript} 941 * {@link android.renderscript.Allocation Allocation} to use as a 942 * destination of preview callback frames. Use 943 * {@link #setPreviewCallbackAllocation setPreviewCallbackAllocation} to use 944 * the created Allocation as a destination for camera preview frames.</p> 945 * 946 * <p>The Allocation will be created with a YUV type, and its contents must 947 * be accessed within Renderscript with the {@code rsGetElementAtYuv_*} 948 * accessor methods. Its size will be based on the current 949 * {@link Parameters#getPreviewSize preview size} configured for this 950 * camera.</p> 951 * 952 * @param rs the RenderScript context for this Allocation. 953 * @param usage additional usage flags to set for the Allocation. The usage 954 * flag {@link android.renderscript.Allocation#USAGE_IO_INPUT} will always 955 * be set on the created Allocation, but additional flags may be provided 956 * here. 957 * @return a new YUV-type Allocation with dimensions equal to the current 958 * preview size. 959 * @throws RSIllegalArgumentException if the usage flags are not compatible 960 * with an YUV Allocation. 961 * @see #setPreviewCallbackAllocation 962 * @hide 963 */ 964 public final Allocation createPreviewAllocation(RenderScript rs, int usage) 965 throws RSIllegalArgumentException { 966 Parameters p = getParameters(); 967 Size previewSize = p.getPreviewSize(); 968 Type.Builder yuvBuilder = new Type.Builder(rs, 969 Element.createPixel(rs, 970 Element.DataType.UNSIGNED_8, 971 Element.DataKind.PIXEL_YUV)); 972 // Use YV12 for wide compatibility. Changing this requires also 973 // adjusting camera service's format selection. 974 yuvBuilder.setYuvFormat(ImageFormat.YV12); 975 yuvBuilder.setX(previewSize.width); 976 yuvBuilder.setY(previewSize.height); 977 978 Allocation a = Allocation.createTyped(rs, yuvBuilder.create(), 979 usage | Allocation.USAGE_IO_INPUT); 980 981 return a; 982 } 983 984 /** 985 * <p>Set an {@link android.renderscript.Allocation Allocation} as the 986 * target of preview callback data. Use this method for efficient processing 987 * of camera preview data with RenderScript. The Allocation must be created 988 * with the {@link #createPreviewAllocation createPreviewAllocation } 989 * method.</p> 990 * 991 * <p>Setting a preview allocation will disable any active preview callbacks 992 * set by {@link #setPreviewCallback setPreviewCallback} or 993 * {@link #setPreviewCallbackWithBuffer setPreviewCallbackWithBuffer}, and 994 * vice versa. Using a preview allocation still requires an active standard 995 * preview target to be set, either with 996 * {@link #setPreviewTexture setPreviewTexture} or 997 * {@link #setPreviewDisplay setPreviewDisplay}.</p> 998 * 999 * <p>To be notified when new frames are available to the Allocation, use 1000 * {@link android.renderscript.Allocation#setIoInputNotificationHandler Allocation.setIoInputNotificationHandler}. To 1001 * update the frame currently accessible from the Allocation to the latest 1002 * preview frame, call 1003 * {@link android.renderscript.Allocation#ioReceive Allocation.ioReceive}.</p> 1004 * 1005 * <p>To disable preview into the Allocation, call this method with a 1006 * {@code null} parameter.</p> 1007 * 1008 * <p>Once a preview allocation is set, the preview size set by 1009 * {@link Parameters#setPreviewSize setPreviewSize} cannot be changed. If 1010 * you wish to change the preview size, first remove the preview allocation 1011 * by calling {@code setPreviewCallbackAllocation(null)}, then change the 1012 * preview size, create a new preview Allocation with 1013 * {@link #createPreviewAllocation createPreviewAllocation}, and set it as 1014 * the new preview callback allocation target.</p> 1015 * 1016 * <p>If you are using the preview data to create video or still images, 1017 * strongly consider using {@link android.media.MediaActionSound} to 1018 * properly indicate image capture or recording start/stop to the user.</p> 1019 * 1020 * @param previewAllocation the allocation to use as destination for preview 1021 * @throws IOException if configuring the camera to use the Allocation for 1022 * preview fails. 1023 * @throws IllegalArgumentException if the Allocation's dimensions or other 1024 * parameters don't meet the requirements. 1025 * @see #createPreviewAllocation 1026 * @see #setPreviewCallback 1027 * @see #setPreviewCallbackWithBuffer 1028 * @hide 1029 */ 1030 public final void setPreviewCallbackAllocation(Allocation previewAllocation) 1031 throws IOException { 1032 Surface previewSurface = null; 1033 if (previewAllocation != null) { 1034 Parameters p = getParameters(); 1035 Size previewSize = p.getPreviewSize(); 1036 if (previewSize.width != previewAllocation.getType().getX() || 1037 previewSize.height != previewAllocation.getType().getY()) { 1038 throw new IllegalArgumentException( 1039 "Allocation dimensions don't match preview dimensions: " + 1040 "Allocation is " + 1041 previewAllocation.getType().getX() + 1042 ", " + 1043 previewAllocation.getType().getY() + 1044 ". Preview is " + previewSize.width + ", " + 1045 previewSize.height); 1046 } 1047 if ((previewAllocation.getUsage() & 1048 Allocation.USAGE_IO_INPUT) == 0) { 1049 throw new IllegalArgumentException( 1050 "Allocation usage does not include USAGE_IO_INPUT"); 1051 } 1052 if (previewAllocation.getType().getElement().getDataKind() != 1053 Element.DataKind.PIXEL_YUV) { 1054 throw new IllegalArgumentException( 1055 "Allocation is not of a YUV type"); 1056 } 1057 previewSurface = previewAllocation.getSurface(); 1058 mUsingPreviewAllocation = true; 1059 } else { 1060 mUsingPreviewAllocation = false; 1061 } 1062 setPreviewCallbackSurface(previewSurface); 1063 } 1064 1065 private native final void setPreviewCallbackSurface(Surface s); 1066 1067 private class EventHandler extends Handler 1068 { 1069 private final Camera mCamera; 1070 1071 public EventHandler(Camera c, Looper looper) { 1072 super(looper); 1073 mCamera = c; 1074 } 1075 1076 @Override 1077 public void handleMessage(Message msg) { 1078 switch(msg.what) { 1079 case CAMERA_MSG_SHUTTER: 1080 if (mShutterCallback != null) { 1081 mShutterCallback.onShutter(); 1082 } 1083 return; 1084 1085 case CAMERA_MSG_RAW_IMAGE: 1086 if (mRawImageCallback != null) { 1087 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 1088 } 1089 return; 1090 1091 case CAMERA_MSG_COMPRESSED_IMAGE: 1092 if (mJpegCallback != null) { 1093 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 1094 } 1095 return; 1096 1097 case CAMERA_MSG_PREVIEW_FRAME: 1098 PreviewCallback pCb = mPreviewCallback; 1099 if (pCb != null) { 1100 if (mOneShot) { 1101 // Clear the callback variable before the callback 1102 // in case the app calls setPreviewCallback from 1103 // the callback function 1104 mPreviewCallback = null; 1105 } else if (!mWithBuffer) { 1106 // We're faking the camera preview mode to prevent 1107 // the app from being flooded with preview frames. 1108 // Set to oneshot mode again. 1109 setHasPreviewCallback(true, false); 1110 } 1111 pCb.onPreviewFrame((byte[])msg.obj, mCamera); 1112 } 1113 return; 1114 1115 case CAMERA_MSG_POSTVIEW_FRAME: 1116 if (mPostviewCallback != null) { 1117 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 1118 } 1119 return; 1120 1121 case CAMERA_MSG_FOCUS: 1122 AutoFocusCallback cb = null; 1123 synchronized (mAutoFocusCallbackLock) { 1124 cb = mAutoFocusCallback; 1125 } 1126 if (cb != null) { 1127 boolean success = msg.arg1 == 0 ? false : true; 1128 cb.onAutoFocus(success, mCamera); 1129 } 1130 return; 1131 1132 case CAMERA_MSG_ZOOM: 1133 if (mZoomListener != null) { 1134 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 1135 } 1136 return; 1137 1138 case CAMERA_MSG_PREVIEW_METADATA: 1139 if (mFaceListener != null) { 1140 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 1141 } 1142 return; 1143 1144 case CAMERA_MSG_ERROR : 1145 Log.e(TAG, "Error " + msg.arg1); 1146 if (mErrorCallback != null) { 1147 mErrorCallback.onError(msg.arg1, mCamera); 1148 } 1149 return; 1150 1151 case CAMERA_MSG_FOCUS_MOVE: 1152 if (mAutoFocusMoveCallback != null) { 1153 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 1154 } 1155 return; 1156 1157 default: 1158 Log.e(TAG, "Unknown message type " + msg.what); 1159 return; 1160 } 1161 } 1162 } 1163 1164 private static void postEventFromNative(Object camera_ref, 1165 int what, int arg1, int arg2, Object obj) 1166 { 1167 Camera c = (Camera)((WeakReference)camera_ref).get(); 1168 if (c == null) 1169 return; 1170 1171 if (c.mEventHandler != null) { 1172 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 1173 c.mEventHandler.sendMessage(m); 1174 } 1175 } 1176 1177 /** 1178 * Callback interface used to notify on completion of camera auto focus. 1179 * 1180 * <p>Devices that do not support auto-focus will receive a "fake" 1181 * callback to this interface. If your application needs auto-focus and 1182 * should not be installed on devices <em>without</em> auto-focus, you must 1183 * declare that your app uses the 1184 * {@code android.hardware.camera.autofocus} feature, in the 1185 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1186 * manifest element.</p> 1187 * 1188 * @see #autoFocus(AutoFocusCallback) 1189 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1190 * applications. 1191 */ 1192 @Deprecated 1193 public interface AutoFocusCallback 1194 { 1195 /** 1196 * Called when the camera auto focus completes. If the camera 1197 * does not support auto-focus and autoFocus is called, 1198 * onAutoFocus will be called immediately with a fake value of 1199 * <code>success</code> set to <code>true</code>. 1200 * 1201 * The auto-focus routine does not lock auto-exposure and auto-white 1202 * balance after it completes. 1203 * 1204 * @param success true if focus was successful, false if otherwise 1205 * @param camera the Camera service object 1206 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1207 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1208 */ 1209 void onAutoFocus(boolean success, Camera camera); 1210 } 1211 1212 /** 1213 * Starts camera auto-focus and registers a callback function to run when 1214 * the camera is focused. This method is only valid when preview is active 1215 * (between {@link #startPreview()} and before {@link #stopPreview()}). 1216 * 1217 * <p>Callers should check 1218 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 1219 * this method should be called. If the camera does not support auto-focus, 1220 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 1221 * callback will be called immediately. 1222 * 1223 * <p>If your application should not be installed 1224 * on devices without auto-focus, you must declare that your application 1225 * uses auto-focus with the 1226 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1227 * manifest element.</p> 1228 * 1229 * <p>If the current flash mode is not 1230 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 1231 * fired during auto-focus, depending on the driver and camera hardware.<p> 1232 * 1233 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 1234 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 1235 * do not change during and after autofocus. But auto-focus routine may stop 1236 * auto-exposure and auto-white balance transiently during focusing. 1237 * 1238 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 1239 * image capture with {@link #takePicture(Camera.ShutterCallback, 1240 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 1241 * the focus position. Applications must call cancelAutoFocus to reset the 1242 * focus.</p> 1243 * 1244 * <p>If autofocus is successful, consider using 1245 * {@link android.media.MediaActionSound} to properly play back an autofocus 1246 * success sound to the user.</p> 1247 * 1248 * @param cb the callback to run 1249 * @see #cancelAutoFocus() 1250 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1251 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1252 * @see android.media.MediaActionSound 1253 */ 1254 public final void autoFocus(AutoFocusCallback cb) 1255 { 1256 synchronized (mAutoFocusCallbackLock) { 1257 mAutoFocusCallback = cb; 1258 } 1259 native_autoFocus(); 1260 } 1261 private native final void native_autoFocus(); 1262 1263 /** 1264 * Cancels any auto-focus function in progress. 1265 * Whether or not auto-focus is currently in progress, 1266 * this function will return the focus position to the default. 1267 * If the camera does not support auto-focus, this is a no-op. 1268 * 1269 * @see #autoFocus(Camera.AutoFocusCallback) 1270 */ 1271 public final void cancelAutoFocus() 1272 { 1273 synchronized (mAutoFocusCallbackLock) { 1274 mAutoFocusCallback = null; 1275 } 1276 native_cancelAutoFocus(); 1277 // CAMERA_MSG_FOCUS should be removed here because the following 1278 // scenario can happen: 1279 // - An application uses the same thread for autoFocus, cancelAutoFocus 1280 // and looper thread. 1281 // - The application calls autoFocus. 1282 // - HAL sends CAMERA_MSG_FOCUS, which enters the looper message queue. 1283 // Before event handler's handleMessage() is invoked, the application 1284 // calls cancelAutoFocus and autoFocus. 1285 // - The application gets the old CAMERA_MSG_FOCUS and thinks autofocus 1286 // has been completed. But in fact it is not. 1287 // 1288 // As documented in the beginning of the file, apps should not use 1289 // multiple threads to call autoFocus and cancelAutoFocus at the same 1290 // time. It is HAL's responsibility not to send a CAMERA_MSG_FOCUS 1291 // message after native_cancelAutoFocus is called. 1292 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 1293 } 1294 private native final void native_cancelAutoFocus(); 1295 1296 /** 1297 * Callback interface used to notify on auto focus start and stop. 1298 * 1299 * <p>This is only supported in continuous autofocus modes -- {@link 1300 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 1301 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 1302 * autofocus animation based on this.</p> 1303 * 1304 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1305 * applications. 1306 */ 1307 @Deprecated 1308 public interface AutoFocusMoveCallback 1309 { 1310 /** 1311 * Called when the camera auto focus starts or stops. 1312 * 1313 * @param start true if focus starts to move, false if focus stops to move 1314 * @param camera the Camera service object 1315 */ 1316 void onAutoFocusMoving(boolean start, Camera camera); 1317 } 1318 1319 /** 1320 * Sets camera auto-focus move callback. 1321 * 1322 * @param cb the callback to run 1323 */ 1324 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 1325 mAutoFocusMoveCallback = cb; 1326 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 1327 } 1328 1329 private native void enableFocusMoveCallback(int enable); 1330 1331 /** 1332 * Callback interface used to signal the moment of actual image capture. 1333 * 1334 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1335 * 1336 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1337 * applications. 1338 */ 1339 @Deprecated 1340 public interface ShutterCallback 1341 { 1342 /** 1343 * Called as near as possible to the moment when a photo is captured 1344 * from the sensor. This is a good opportunity to play a shutter sound 1345 * or give other feedback of camera operation. This may be some time 1346 * after the photo was triggered, but some time before the actual data 1347 * is available. 1348 */ 1349 void onShutter(); 1350 } 1351 1352 /** 1353 * Callback interface used to supply image data from a photo capture. 1354 * 1355 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1356 * 1357 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1358 * applications. 1359 */ 1360 @Deprecated 1361 public interface PictureCallback { 1362 /** 1363 * Called when image data is available after a picture is taken. 1364 * The format of the data depends on the context of the callback 1365 * and {@link Camera.Parameters} settings. 1366 * 1367 * @param data a byte array of the picture data 1368 * @param camera the Camera service object 1369 */ 1370 void onPictureTaken(byte[] data, Camera camera); 1371 }; 1372 1373 /** 1374 * Equivalent to takePicture(shutter, raw, null, jpeg). 1375 * 1376 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1377 */ 1378 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1379 PictureCallback jpeg) { 1380 takePicture(shutter, raw, null, jpeg); 1381 } 1382 private native final void native_takePicture(int msgType); 1383 1384 /** 1385 * Triggers an asynchronous image capture. The camera service will initiate 1386 * a series of callbacks to the application as the image capture progresses. 1387 * The shutter callback occurs after the image is captured. This can be used 1388 * to trigger a sound to let the user know that image has been captured. The 1389 * raw callback occurs when the raw image data is available (NOTE: the data 1390 * will be null if there is no raw image callback buffer available or the 1391 * raw image callback buffer is not large enough to hold the raw image). 1392 * The postview callback occurs when a scaled, fully processed postview 1393 * image is available (NOTE: not all hardware supports this). The jpeg 1394 * callback occurs when the compressed image is available. If the 1395 * application does not need a particular callback, a null can be passed 1396 * instead of a callback method. 1397 * 1398 * <p>This method is only valid when preview is active (after 1399 * {@link #startPreview()}). Preview will be stopped after the image is 1400 * taken; callers must call {@link #startPreview()} again if they want to 1401 * re-start preview or take more pictures. This should not be called between 1402 * {@link android.media.MediaRecorder#start()} and 1403 * {@link android.media.MediaRecorder#stop()}. 1404 * 1405 * <p>After calling this method, you must not call {@link #startPreview()} 1406 * or take another picture until the JPEG callback has returned. 1407 * 1408 * @param shutter the callback for image capture moment, or null 1409 * @param raw the callback for raw (uncompressed) image data, or null 1410 * @param postview callback with postview image data, may be null 1411 * @param jpeg the callback for JPEG image data, or null 1412 */ 1413 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1414 PictureCallback postview, PictureCallback jpeg) { 1415 mShutterCallback = shutter; 1416 mRawImageCallback = raw; 1417 mPostviewCallback = postview; 1418 mJpegCallback = jpeg; 1419 1420 // If callback is not set, do not send me callbacks. 1421 int msgType = 0; 1422 if (mShutterCallback != null) { 1423 msgType |= CAMERA_MSG_SHUTTER; 1424 } 1425 if (mRawImageCallback != null) { 1426 msgType |= CAMERA_MSG_RAW_IMAGE; 1427 } 1428 if (mPostviewCallback != null) { 1429 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1430 } 1431 if (mJpegCallback != null) { 1432 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1433 } 1434 1435 native_takePicture(msgType); 1436 mFaceDetectionRunning = false; 1437 } 1438 1439 /** 1440 * Zooms to the requested value smoothly. The driver will notify {@link 1441 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1442 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1443 * is called with value 3. The 1444 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1445 * method will be called three times with zoom values 1, 2, and 3. 1446 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1447 * Applications should not call startSmoothZoom again or change the zoom 1448 * value before zoom stops. If the supplied zoom value equals to the current 1449 * zoom value, no zoom callback will be generated. This method is supported 1450 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1451 * returns true. 1452 * 1453 * @param value zoom value. The valid range is 0 to {@link 1454 * android.hardware.Camera.Parameters#getMaxZoom}. 1455 * @throws IllegalArgumentException if the zoom value is invalid. 1456 * @throws RuntimeException if the method fails. 1457 * @see #setZoomChangeListener(OnZoomChangeListener) 1458 */ 1459 public native final void startSmoothZoom(int value); 1460 1461 /** 1462 * Stops the smooth zoom. Applications should wait for the {@link 1463 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1464 * method is supported if {@link 1465 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1466 * 1467 * @throws RuntimeException if the method fails. 1468 */ 1469 public native final void stopSmoothZoom(); 1470 1471 /** 1472 * Set the clockwise rotation of preview display in degrees. This affects 1473 * the preview frames and the picture displayed after snapshot. This method 1474 * is useful for portrait mode applications. Note that preview display of 1475 * front-facing cameras is flipped horizontally before the rotation, that 1476 * is, the image is reflected along the central vertical axis of the camera 1477 * sensor. So the users can see themselves as looking into a mirror. 1478 * 1479 * <p>This does not affect the order of byte array passed in {@link 1480 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1481 * method is not allowed to be called during preview. 1482 * 1483 * <p>If you want to make the camera image show in the same orientation as 1484 * the display, you can use the following code. 1485 * <pre> 1486 * public static void setCameraDisplayOrientation(Activity activity, 1487 * int cameraId, android.hardware.Camera camera) { 1488 * android.hardware.Camera.CameraInfo info = 1489 * new android.hardware.Camera.CameraInfo(); 1490 * android.hardware.Camera.getCameraInfo(cameraId, info); 1491 * int rotation = activity.getWindowManager().getDefaultDisplay() 1492 * .getRotation(); 1493 * int degrees = 0; 1494 * switch (rotation) { 1495 * case Surface.ROTATION_0: degrees = 0; break; 1496 * case Surface.ROTATION_90: degrees = 90; break; 1497 * case Surface.ROTATION_180: degrees = 180; break; 1498 * case Surface.ROTATION_270: degrees = 270; break; 1499 * } 1500 * 1501 * int result; 1502 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1503 * result = (info.orientation + degrees) % 360; 1504 * result = (360 - result) % 360; // compensate the mirror 1505 * } else { // back-facing 1506 * result = (info.orientation - degrees + 360) % 360; 1507 * } 1508 * camera.setDisplayOrientation(result); 1509 * } 1510 * </pre> 1511 * 1512 * <p>Starting from API level 14, this method can be called when preview is 1513 * active. 1514 * 1515 * @param degrees the angle that the picture will be rotated clockwise. 1516 * Valid values are 0, 90, 180, and 270. The starting 1517 * position is 0 (landscape). 1518 * @see #setPreviewDisplay(SurfaceHolder) 1519 */ 1520 public native final void setDisplayOrientation(int degrees); 1521 1522 /** 1523 * <p>Enable or disable the default shutter sound when taking a picture.</p> 1524 * 1525 * <p>By default, the camera plays the system-defined camera shutter sound 1526 * when {@link #takePicture} is called. Using this method, the shutter sound 1527 * can be disabled. It is strongly recommended that an alternative shutter 1528 * sound is played in the {@link ShutterCallback} when the system shutter 1529 * sound is disabled.</p> 1530 * 1531 * <p>Note that devices may not always allow disabling the camera shutter 1532 * sound. If the shutter sound state cannot be set to the desired value, 1533 * this method will return false. {@link CameraInfo#canDisableShutterSound} 1534 * can be used to determine whether the device will allow the shutter sound 1535 * to be disabled.</p> 1536 * 1537 * @param enabled whether the camera should play the system shutter sound 1538 * when {@link #takePicture takePicture} is called. 1539 * @return {@code true} if the shutter sound state was successfully 1540 * changed. {@code false} if the shutter sound state could not be 1541 * changed. {@code true} is also returned if shutter sound playback 1542 * is already set to the requested state. 1543 * @see #takePicture 1544 * @see CameraInfo#canDisableShutterSound 1545 * @see ShutterCallback 1546 */ 1547 public final boolean enableShutterSound(boolean enabled) { 1548 if (!enabled) { 1549 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 1550 IAudioService audioService = IAudioService.Stub.asInterface(b); 1551 try { 1552 if (audioService.isCameraSoundForced()) return false; 1553 } catch (RemoteException e) { 1554 Log.e(TAG, "Audio service is unavailable for queries"); 1555 } 1556 } 1557 return _enableShutterSound(enabled); 1558 } 1559 1560 /** 1561 * Disable the shutter sound unconditionally. 1562 * 1563 * <p> 1564 * This is only guaranteed to work for legacy cameras 1565 * (i.e. initialized with {@link #cameraInitUnspecified}). Trying to call this on 1566 * a regular camera will force a conditional check in the camera service. 1567 * </p> 1568 * 1569 * @return {@code true} if the shutter sound state was successfully 1570 * changed. {@code false} if the shutter sound state could not be 1571 * changed. {@code true} is also returned if shutter sound playback 1572 * is already set to the requested state. 1573 * 1574 * @hide 1575 */ 1576 public final boolean disableShutterSound() { 1577 return _enableShutterSound(/*enabled*/false); 1578 } 1579 1580 private native final boolean _enableShutterSound(boolean enabled); 1581 1582 /** 1583 * Callback interface for zoom changes during a smooth zoom operation. 1584 * 1585 * @see #setZoomChangeListener(OnZoomChangeListener) 1586 * @see #startSmoothZoom(int) 1587 * 1588 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1589 * applications. 1590 */ 1591 @Deprecated 1592 public interface OnZoomChangeListener 1593 { 1594 /** 1595 * Called when the zoom value has changed during a smooth zoom. 1596 * 1597 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1598 * calls this for every new zoom value. 1599 * @param stopped whether smooth zoom is stopped. If the value is true, 1600 * this is the last zoom update for the application. 1601 * @param camera the Camera service object 1602 */ 1603 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1604 }; 1605 1606 /** 1607 * Registers a listener to be notified when the zoom value is updated by the 1608 * camera driver during smooth zoom. 1609 * 1610 * @param listener the listener to notify 1611 * @see #startSmoothZoom(int) 1612 */ 1613 public final void setZoomChangeListener(OnZoomChangeListener listener) 1614 { 1615 mZoomListener = listener; 1616 } 1617 1618 /** 1619 * Callback interface for face detected in the preview frame. 1620 * 1621 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1622 * applications. 1623 */ 1624 @Deprecated 1625 public interface FaceDetectionListener 1626 { 1627 /** 1628 * Notify the listener of the detected faces in the preview frame. 1629 * 1630 * @param faces The detected faces in a list 1631 * @param camera The {@link Camera} service object 1632 */ 1633 void onFaceDetection(Face[] faces, Camera camera); 1634 } 1635 1636 /** 1637 * Registers a listener to be notified about the faces detected in the 1638 * preview frame. 1639 * 1640 * @param listener the listener to notify 1641 * @see #startFaceDetection() 1642 */ 1643 public final void setFaceDetectionListener(FaceDetectionListener listener) 1644 { 1645 mFaceListener = listener; 1646 } 1647 1648 /** 1649 * Starts the face detection. This should be called after preview is started. 1650 * The camera will notify {@link FaceDetectionListener} of the detected 1651 * faces in the preview frame. The detected faces may be the same as the 1652 * previous ones. Applications should call {@link #stopFaceDetection} to 1653 * stop the face detection. This method is supported if {@link 1654 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1655 * If the face detection has started, apps should not call this again. 1656 * 1657 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1658 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1659 * have no effect. The camera uses the detected faces to do auto-white balance, 1660 * auto exposure, and autofocus. 1661 * 1662 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1663 * will stop sending face callbacks. The last face callback indicates the 1664 * areas used to do autofocus. After focus completes, face detection will 1665 * resume sending face callbacks. If the apps call {@link 1666 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1667 * 1668 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1669 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1670 * preview with {@link #startPreview()}, the apps should call this method 1671 * again to resume face detection.</p> 1672 * 1673 * @throws IllegalArgumentException if the face detection is unsupported. 1674 * @throws RuntimeException if the method fails or the face detection is 1675 * already running. 1676 * @see FaceDetectionListener 1677 * @see #stopFaceDetection() 1678 * @see Parameters#getMaxNumDetectedFaces() 1679 */ 1680 public final void startFaceDetection() { 1681 if (mFaceDetectionRunning) { 1682 throw new RuntimeException("Face detection is already running"); 1683 } 1684 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1685 mFaceDetectionRunning = true; 1686 } 1687 1688 /** 1689 * Stops the face detection. 1690 * 1691 * @see #startFaceDetection() 1692 */ 1693 public final void stopFaceDetection() { 1694 _stopFaceDetection(); 1695 mFaceDetectionRunning = false; 1696 } 1697 1698 private native final void _startFaceDetection(int type); 1699 private native final void _stopFaceDetection(); 1700 1701 /** 1702 * Information about a face identified through camera face detection. 1703 * 1704 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1705 * list of face objects for use in focusing and metering.</p> 1706 * 1707 * @see FaceDetectionListener 1708 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1709 * applications. 1710 */ 1711 @Deprecated 1712 public static class Face { 1713 /** 1714 * Create an empty face. 1715 */ 1716 public Face() { 1717 } 1718 1719 /** 1720 * Bounds of the face. (-1000, -1000) represents the top-left of the 1721 * camera field of view, and (1000, 1000) represents the bottom-right of 1722 * the field of view. For example, suppose the size of the viewfinder UI 1723 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1724 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1725 * guaranteed left < right and top < bottom. The coordinates can be 1726 * smaller than -1000 or bigger than 1000. But at least one vertex will 1727 * be within (-1000, -1000) and (1000, 1000). 1728 * 1729 * <p>The direction is relative to the sensor orientation, that is, what 1730 * the sensor sees. The direction is not affected by the rotation or 1731 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1732 * rectangle does not provide any information about face orientation.</p> 1733 * 1734 * <p>Here is the matrix to convert driver coordinates to View coordinates 1735 * in pixels.</p> 1736 * <pre> 1737 * Matrix matrix = new Matrix(); 1738 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1739 * // Need mirror for front camera. 1740 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1741 * matrix.setScale(mirror ? -1 : 1, 1); 1742 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1743 * matrix.postRotate(displayOrientation); 1744 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1745 * // UI coordinates range from (0, 0) to (width, height). 1746 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1747 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1748 * </pre> 1749 * 1750 * @see #startFaceDetection() 1751 */ 1752 public Rect rect; 1753 1754 /** 1755 * <p>The confidence level for the detection of the face. The range is 1 to 1756 * 100. 100 is the highest confidence.</p> 1757 * 1758 * <p>Depending on the device, even very low-confidence faces may be 1759 * listed, so applications should filter out faces with low confidence, 1760 * depending on the use case. For a typical point-and-shoot camera 1761 * application that wishes to display rectangles around detected faces, 1762 * filtering out faces with confidence less than 50 is recommended.</p> 1763 * 1764 * @see #startFaceDetection() 1765 */ 1766 public int score; 1767 1768 /** 1769 * An unique id per face while the face is visible to the tracker. If 1770 * the face leaves the field-of-view and comes back, it will get a new 1771 * id. This is an optional field, may not be supported on all devices. 1772 * If not supported, id will always be set to -1. The optional fields 1773 * are supported as a set. Either they are all valid, or none of them 1774 * are. 1775 */ 1776 public int id = -1; 1777 1778 /** 1779 * The coordinates of the center of the left eye. The coordinates are in 1780 * the same space as the ones for {@link #rect}. This is an optional 1781 * field, may not be supported on all devices. If not supported, the 1782 * value will always be set to null. The optional fields are supported 1783 * as a set. Either they are all valid, or none of them are. 1784 */ 1785 public Point leftEye = null; 1786 1787 /** 1788 * The coordinates of the center of the right eye. The coordinates are 1789 * in the same space as the ones for {@link #rect}.This is an optional 1790 * field, may not be supported on all devices. If not supported, the 1791 * value will always be set to null. The optional fields are supported 1792 * as a set. Either they are all valid, or none of them are. 1793 */ 1794 public Point rightEye = null; 1795 1796 /** 1797 * The coordinates of the center of the mouth. The coordinates are in 1798 * the same space as the ones for {@link #rect}. This is an optional 1799 * field, may not be supported on all devices. If not supported, the 1800 * value will always be set to null. The optional fields are supported 1801 * as a set. Either they are all valid, or none of them are. 1802 */ 1803 public Point mouth = null; 1804 } 1805 1806 // Error codes match the enum in include/ui/Camera.h 1807 1808 /** 1809 * Unspecified camera error. 1810 * @see Camera.ErrorCallback 1811 */ 1812 public static final int CAMERA_ERROR_UNKNOWN = 1; 1813 1814 /** 1815 * Media server died. In this case, the application must release the 1816 * Camera object and instantiate a new one. 1817 * @see Camera.ErrorCallback 1818 */ 1819 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1820 1821 /** 1822 * Callback interface for camera error notification. 1823 * 1824 * @see #setErrorCallback(ErrorCallback) 1825 * 1826 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1827 * applications. 1828 */ 1829 @Deprecated 1830 public interface ErrorCallback 1831 { 1832 /** 1833 * Callback for camera errors. 1834 * @param error error code: 1835 * <ul> 1836 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1837 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1838 * </ul> 1839 * @param camera the Camera service object 1840 */ 1841 void onError(int error, Camera camera); 1842 }; 1843 1844 /** 1845 * Registers a callback to be invoked when an error occurs. 1846 * @param cb The callback to run 1847 */ 1848 public final void setErrorCallback(ErrorCallback cb) 1849 { 1850 mErrorCallback = cb; 1851 } 1852 1853 private native final void native_setParameters(String params); 1854 private native final String native_getParameters(); 1855 1856 /** 1857 * Changes the settings for this Camera service. 1858 * 1859 * @param params the Parameters to use for this Camera service 1860 * @throws RuntimeException if any parameter is invalid or not supported. 1861 * @see #getParameters() 1862 */ 1863 public void setParameters(Parameters params) { 1864 // If using preview allocations, don't allow preview size changes 1865 if (mUsingPreviewAllocation) { 1866 Size newPreviewSize = params.getPreviewSize(); 1867 Size currentPreviewSize = getParameters().getPreviewSize(); 1868 if (newPreviewSize.width != currentPreviewSize.width || 1869 newPreviewSize.height != currentPreviewSize.height) { 1870 throw new IllegalStateException("Cannot change preview size" + 1871 " while a preview allocation is configured."); 1872 } 1873 } 1874 1875 native_setParameters(params.flatten()); 1876 } 1877 1878 /** 1879 * Returns the current settings for this Camera service. 1880 * If modifications are made to the returned Parameters, they must be passed 1881 * to {@link #setParameters(Camera.Parameters)} to take effect. 1882 * 1883 * @see #setParameters(Camera.Parameters) 1884 */ 1885 public Parameters getParameters() { 1886 Parameters p = new Parameters(); 1887 String s = native_getParameters(); 1888 p.unflatten(s); 1889 return p; 1890 } 1891 1892 /** 1893 * Returns an empty {@link Parameters} for testing purpose. 1894 * 1895 * @return a Parameter object. 1896 * 1897 * @hide 1898 */ 1899 public static Parameters getEmptyParameters() { 1900 Camera camera = new Camera(); 1901 return camera.new Parameters(); 1902 } 1903 1904 /** 1905 * Returns a copied {@link Parameters}; for shim use only. 1906 * 1907 * @param parameters a non-{@code null} parameters 1908 * @return a Parameter object, with all the parameters copied from {@code parameters}. 1909 * 1910 * @throws NullPointerException if {@code parameters} was {@code null} 1911 * @hide 1912 */ 1913 public static Parameters getParametersCopy(Camera.Parameters parameters) { 1914 if (parameters == null) { 1915 throw new NullPointerException("parameters must not be null"); 1916 } 1917 1918 Camera camera = parameters.getOuter(); 1919 Parameters p = camera.new Parameters(); 1920 p.copyFrom(parameters); 1921 1922 return p; 1923 } 1924 1925 /** 1926 * Image size (width and height dimensions). 1927 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1928 * applications. 1929 */ 1930 @Deprecated 1931 public class Size { 1932 /** 1933 * Sets the dimensions for pictures. 1934 * 1935 * @param w the photo width (pixels) 1936 * @param h the photo height (pixels) 1937 */ 1938 public Size(int w, int h) { 1939 width = w; 1940 height = h; 1941 } 1942 /** 1943 * Compares {@code obj} to this size. 1944 * 1945 * @param obj the object to compare this size with. 1946 * @return {@code true} if the width and height of {@code obj} is the 1947 * same as those of this size. {@code false} otherwise. 1948 */ 1949 @Override 1950 public boolean equals(Object obj) { 1951 if (!(obj instanceof Size)) { 1952 return false; 1953 } 1954 Size s = (Size) obj; 1955 return width == s.width && height == s.height; 1956 } 1957 @Override 1958 public int hashCode() { 1959 return width * 32713 + height; 1960 } 1961 /** width of the picture */ 1962 public int width; 1963 /** height of the picture */ 1964 public int height; 1965 }; 1966 1967 /** 1968 * <p>The Area class is used for choosing specific metering and focus areas for 1969 * the camera to use when calculating auto-exposure, auto-white balance, and 1970 * auto-focus.</p> 1971 * 1972 * <p>To find out how many simultaneous areas a given camera supports, use 1973 * {@link Parameters#getMaxNumMeteringAreas()} and 1974 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1975 * selection is unsupported, these methods will return 0.</p> 1976 * 1977 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1978 * that determines its importance. The bounds are relative to the camera's 1979 * current field of view. The coordinates are mapped so that (-1000, -1000) 1980 * is always the top-left corner of the current field of view, and (1000, 1981 * 1000) is always the bottom-right corner of the current field of 1982 * view. Setting Areas with bounds outside that range is not allowed. Areas 1983 * with zero or negative width or height are not allowed.</p> 1984 * 1985 * <p>The weight must range from 1 to 1000, and represents a weight for 1986 * every pixel in the area. This means that a large metering area with 1987 * the same weight as a smaller area will have more effect in the 1988 * metering result. Metering areas can overlap and the driver 1989 * will add the weights in the overlap region.</p> 1990 * 1991 * @see Parameters#setFocusAreas(List) 1992 * @see Parameters#getFocusAreas() 1993 * @see Parameters#getMaxNumFocusAreas() 1994 * @see Parameters#setMeteringAreas(List) 1995 * @see Parameters#getMeteringAreas() 1996 * @see Parameters#getMaxNumMeteringAreas() 1997 * 1998 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1999 * applications. 2000 */ 2001 @Deprecated 2002 public static class Area { 2003 /** 2004 * Create an area with specified rectangle and weight. 2005 * 2006 * @param rect the bounds of the area. 2007 * @param weight the weight of the area. 2008 */ 2009 public Area(Rect rect, int weight) { 2010 this.rect = rect; 2011 this.weight = weight; 2012 } 2013 /** 2014 * Compares {@code obj} to this area. 2015 * 2016 * @param obj the object to compare this area with. 2017 * @return {@code true} if the rectangle and weight of {@code obj} is 2018 * the same as those of this area. {@code false} otherwise. 2019 */ 2020 @Override 2021 public boolean equals(Object obj) { 2022 if (!(obj instanceof Area)) { 2023 return false; 2024 } 2025 Area a = (Area) obj; 2026 if (rect == null) { 2027 if (a.rect != null) return false; 2028 } else { 2029 if (!rect.equals(a.rect)) return false; 2030 } 2031 return weight == a.weight; 2032 } 2033 2034 /** 2035 * Bounds of the area. (-1000, -1000) represents the top-left of the 2036 * camera field of view, and (1000, 1000) represents the bottom-right of 2037 * the field of view. Setting bounds outside that range is not 2038 * allowed. Bounds with zero or negative width or height are not 2039 * allowed. 2040 * 2041 * @see Parameters#getFocusAreas() 2042 * @see Parameters#getMeteringAreas() 2043 */ 2044 public Rect rect; 2045 2046 /** 2047 * Weight of the area. The weight must range from 1 to 1000, and 2048 * represents a weight for every pixel in the area. This means that a 2049 * large metering area with the same weight as a smaller area will have 2050 * more effect in the metering result. Metering areas can overlap and 2051 * the driver will add the weights in the overlap region. 2052 * 2053 * @see Parameters#getFocusAreas() 2054 * @see Parameters#getMeteringAreas() 2055 */ 2056 public int weight; 2057 } 2058 2059 /** 2060 * Camera service settings. 2061 * 2062 * <p>To make camera parameters take effect, applications have to call 2063 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 2064 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 2065 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 2066 * is called with the changed parameters object. 2067 * 2068 * <p>Different devices may have different camera capabilities, such as 2069 * picture size or flash modes. The application should query the camera 2070 * capabilities before setting parameters. For example, the application 2071 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 2072 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 2073 * camera does not support color effects, 2074 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 2075 * 2076 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 2077 * applications. 2078 */ 2079 @Deprecated 2080 public class Parameters { 2081 // Parameter keys to communicate with the camera driver. 2082 private static final String KEY_PREVIEW_SIZE = "preview-size"; 2083 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 2084 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 2085 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 2086 private static final String KEY_PICTURE_SIZE = "picture-size"; 2087 private static final String KEY_PICTURE_FORMAT = "picture-format"; 2088 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 2089 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 2090 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 2091 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 2092 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 2093 private static final String KEY_ROTATION = "rotation"; 2094 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 2095 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 2096 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 2097 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 2098 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 2099 private static final String KEY_WHITE_BALANCE = "whitebalance"; 2100 private static final String KEY_EFFECT = "effect"; 2101 private static final String KEY_ANTIBANDING = "antibanding"; 2102 private static final String KEY_SCENE_MODE = "scene-mode"; 2103 private static final String KEY_FLASH_MODE = "flash-mode"; 2104 private static final String KEY_FOCUS_MODE = "focus-mode"; 2105 private static final String KEY_FOCUS_AREAS = "focus-areas"; 2106 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 2107 private static final String KEY_FOCAL_LENGTH = "focal-length"; 2108 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 2109 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 2110 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 2111 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 2112 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 2113 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 2114 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 2115 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 2116 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 2117 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 2118 private static final String KEY_METERING_AREAS = "metering-areas"; 2119 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 2120 private static final String KEY_ZOOM = "zoom"; 2121 private static final String KEY_MAX_ZOOM = "max-zoom"; 2122 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 2123 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 2124 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 2125 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 2126 private static final String KEY_VIDEO_SIZE = "video-size"; 2127 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 2128 "preferred-preview-size-for-video"; 2129 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 2130 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 2131 private static final String KEY_RECORDING_HINT = "recording-hint"; 2132 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 2133 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 2134 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 2135 2136 // Parameter key suffix for supported values. 2137 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 2138 2139 private static final String TRUE = "true"; 2140 private static final String FALSE = "false"; 2141 2142 // Values for white balance settings. 2143 public static final String WHITE_BALANCE_AUTO = "auto"; 2144 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 2145 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 2146 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 2147 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 2148 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 2149 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 2150 public static final String WHITE_BALANCE_SHADE = "shade"; 2151 2152 // Values for color effect settings. 2153 public static final String EFFECT_NONE = "none"; 2154 public static final String EFFECT_MONO = "mono"; 2155 public static final String EFFECT_NEGATIVE = "negative"; 2156 public static final String EFFECT_SOLARIZE = "solarize"; 2157 public static final String EFFECT_SEPIA = "sepia"; 2158 public static final String EFFECT_POSTERIZE = "posterize"; 2159 public static final String EFFECT_WHITEBOARD = "whiteboard"; 2160 public static final String EFFECT_BLACKBOARD = "blackboard"; 2161 public static final String EFFECT_AQUA = "aqua"; 2162 2163 // Values for antibanding settings. 2164 public static final String ANTIBANDING_AUTO = "auto"; 2165 public static final String ANTIBANDING_50HZ = "50hz"; 2166 public static final String ANTIBANDING_60HZ = "60hz"; 2167 public static final String ANTIBANDING_OFF = "off"; 2168 2169 // Values for flash mode settings. 2170 /** 2171 * Flash will not be fired. 2172 */ 2173 public static final String FLASH_MODE_OFF = "off"; 2174 2175 /** 2176 * Flash will be fired automatically when required. The flash may be fired 2177 * during preview, auto-focus, or snapshot depending on the driver. 2178 */ 2179 public static final String FLASH_MODE_AUTO = "auto"; 2180 2181 /** 2182 * Flash will always be fired during snapshot. The flash may also be 2183 * fired during preview or auto-focus depending on the driver. 2184 */ 2185 public static final String FLASH_MODE_ON = "on"; 2186 2187 /** 2188 * Flash will be fired in red-eye reduction mode. 2189 */ 2190 public static final String FLASH_MODE_RED_EYE = "red-eye"; 2191 2192 /** 2193 * Constant emission of light during preview, auto-focus and snapshot. 2194 * This can also be used for video recording. 2195 */ 2196 public static final String FLASH_MODE_TORCH = "torch"; 2197 2198 /** 2199 * Scene mode is off. 2200 */ 2201 public static final String SCENE_MODE_AUTO = "auto"; 2202 2203 /** 2204 * Take photos of fast moving objects. Same as {@link 2205 * #SCENE_MODE_SPORTS}. 2206 */ 2207 public static final String SCENE_MODE_ACTION = "action"; 2208 2209 /** 2210 * Take people pictures. 2211 */ 2212 public static final String SCENE_MODE_PORTRAIT = "portrait"; 2213 2214 /** 2215 * Take pictures on distant objects. 2216 */ 2217 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 2218 2219 /** 2220 * Take photos at night. 2221 */ 2222 public static final String SCENE_MODE_NIGHT = "night"; 2223 2224 /** 2225 * Take people pictures at night. 2226 */ 2227 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 2228 2229 /** 2230 * Take photos in a theater. Flash light is off. 2231 */ 2232 public static final String SCENE_MODE_THEATRE = "theatre"; 2233 2234 /** 2235 * Take pictures on the beach. 2236 */ 2237 public static final String SCENE_MODE_BEACH = "beach"; 2238 2239 /** 2240 * Take pictures on the snow. 2241 */ 2242 public static final String SCENE_MODE_SNOW = "snow"; 2243 2244 /** 2245 * Take sunset photos. 2246 */ 2247 public static final String SCENE_MODE_SUNSET = "sunset"; 2248 2249 /** 2250 * Avoid blurry pictures (for example, due to hand shake). 2251 */ 2252 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 2253 2254 /** 2255 * For shooting firework displays. 2256 */ 2257 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 2258 2259 /** 2260 * Take photos of fast moving objects. Same as {@link 2261 * #SCENE_MODE_ACTION}. 2262 */ 2263 public static final String SCENE_MODE_SPORTS = "sports"; 2264 2265 /** 2266 * Take indoor low-light shot. 2267 */ 2268 public static final String SCENE_MODE_PARTY = "party"; 2269 2270 /** 2271 * Capture the naturally warm color of scenes lit by candles. 2272 */ 2273 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 2274 2275 /** 2276 * Applications are looking for a barcode. Camera driver will be 2277 * optimized for barcode reading. 2278 */ 2279 public static final String SCENE_MODE_BARCODE = "barcode"; 2280 2281 /** 2282 * Capture a scene using high dynamic range imaging techniques. The 2283 * camera will return an image that has an extended dynamic range 2284 * compared to a regular capture. Capturing such an image may take 2285 * longer than a regular capture. 2286 */ 2287 public static final String SCENE_MODE_HDR = "hdr"; 2288 2289 /** 2290 * Auto-focus mode. Applications should call {@link 2291 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 2292 */ 2293 public static final String FOCUS_MODE_AUTO = "auto"; 2294 2295 /** 2296 * Focus is set at infinity. Applications should not call 2297 * {@link #autoFocus(AutoFocusCallback)} in this mode. 2298 */ 2299 public static final String FOCUS_MODE_INFINITY = "infinity"; 2300 2301 /** 2302 * Macro (close-up) focus mode. Applications should call 2303 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 2304 * mode. 2305 */ 2306 public static final String FOCUS_MODE_MACRO = "macro"; 2307 2308 /** 2309 * Focus is fixed. The camera is always in this mode if the focus is not 2310 * adjustable. If the camera has auto-focus, this mode can fix the 2311 * focus, which is usually at hyperfocal distance. Applications should 2312 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 2313 */ 2314 public static final String FOCUS_MODE_FIXED = "fixed"; 2315 2316 /** 2317 * Extended depth of field (EDOF). Focusing is done digitally and 2318 * continuously. Applications should not call {@link 2319 * #autoFocus(AutoFocusCallback)} in this mode. 2320 */ 2321 public static final String FOCUS_MODE_EDOF = "edof"; 2322 2323 /** 2324 * Continuous auto focus mode intended for video recording. The camera 2325 * continuously tries to focus. This is the best choice for video 2326 * recording because the focus changes smoothly . Applications still can 2327 * call {@link #takePicture(Camera.ShutterCallback, 2328 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 2329 * subject may not be in focus. Auto focus starts when the parameter is 2330 * set. 2331 * 2332 * <p>Since API level 14, applications can call {@link 2333 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 2334 * immediately return with a boolean that indicates whether the focus is 2335 * sharp or not. The focus position is locked after autoFocus call. If 2336 * applications want to resume the continuous focus, cancelAutoFocus 2337 * must be called. Restarting the preview will not resume the continuous 2338 * autofocus. To stop continuous focus, applications should change the 2339 * focus mode to other modes. 2340 * 2341 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 2342 */ 2343 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 2344 2345 /** 2346 * Continuous auto focus mode intended for taking pictures. The camera 2347 * continuously tries to focus. The speed of focus change is more 2348 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 2349 * starts when the parameter is set. 2350 * 2351 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 2352 * this mode. If the autofocus is in the middle of scanning, the focus 2353 * callback will return when it completes. If the autofocus is not 2354 * scanning, the focus callback will immediately return with a boolean 2355 * that indicates whether the focus is sharp or not. The apps can then 2356 * decide if they want to take a picture immediately or to change the 2357 * focus mode to auto, and run a full autofocus cycle. The focus 2358 * position is locked after autoFocus call. If applications want to 2359 * resume the continuous focus, cancelAutoFocus must be called. 2360 * Restarting the preview will not resume the continuous autofocus. To 2361 * stop continuous focus, applications should change the focus mode to 2362 * other modes. 2363 * 2364 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2365 */ 2366 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 2367 2368 // Indices for focus distance array. 2369 /** 2370 * The array index of near focus distance for use with 2371 * {@link #getFocusDistances(float[])}. 2372 */ 2373 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 2374 2375 /** 2376 * The array index of optimal focus distance for use with 2377 * {@link #getFocusDistances(float[])}. 2378 */ 2379 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 2380 2381 /** 2382 * The array index of far focus distance for use with 2383 * {@link #getFocusDistances(float[])}. 2384 */ 2385 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 2386 2387 /** 2388 * The array index of minimum preview fps for use with {@link 2389 * #getPreviewFpsRange(int[])} or {@link 2390 * #getSupportedPreviewFpsRange()}. 2391 */ 2392 public static final int PREVIEW_FPS_MIN_INDEX = 0; 2393 2394 /** 2395 * The array index of maximum preview fps for use with {@link 2396 * #getPreviewFpsRange(int[])} or {@link 2397 * #getSupportedPreviewFpsRange()}. 2398 */ 2399 public static final int PREVIEW_FPS_MAX_INDEX = 1; 2400 2401 // Formats for setPreviewFormat and setPictureFormat. 2402 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 2403 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 2404 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 2405 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 2406 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 2407 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 2408 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 2409 2410 /** 2411 * Order matters: Keys that are {@link #set(String, String) set} later 2412 * will take precedence over keys that are set earlier (if the two keys 2413 * conflict with each other). 2414 * 2415 * <p>One example is {@link #setPreviewFpsRange(int, int)} , since it 2416 * conflicts with {@link #setPreviewFrameRate(int)} whichever key is set later 2417 * is the one that will take precedence. 2418 * </p> 2419 */ 2420 private final LinkedHashMap<String, String> mMap; 2421 2422 private Parameters() { 2423 mMap = new LinkedHashMap<String, String>(/*initialCapacity*/64); 2424 } 2425 2426 /** 2427 * Overwrite existing parameters with a copy of the ones from {@code other}. 2428 * 2429 * <b>For use by the legacy shim only.</b> 2430 * 2431 * @hide 2432 */ 2433 public void copyFrom(Parameters other) { 2434 if (other == null) { 2435 throw new NullPointerException("other must not be null"); 2436 } 2437 2438 mMap.putAll(other.mMap); 2439 } 2440 2441 private Camera getOuter() { 2442 return Camera.this; 2443 } 2444 2445 2446 /** 2447 * Value equality check. 2448 * 2449 * @hide 2450 */ 2451 public boolean same(Parameters other) { 2452 if (this == other) { 2453 return true; 2454 } 2455 return other != null && Parameters.this.mMap.equals(other.mMap); 2456 } 2457 2458 /** 2459 * Writes the current Parameters to the log. 2460 * @hide 2461 * @deprecated 2462 */ 2463 @Deprecated 2464 public void dump() { 2465 Log.e(TAG, "dump: size=" + mMap.size()); 2466 for (String k : mMap.keySet()) { 2467 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 2468 } 2469 } 2470 2471 /** 2472 * Creates a single string with all the parameters set in 2473 * this Parameters object. 2474 * <p>The {@link #unflatten(String)} method does the reverse.</p> 2475 * 2476 * @return a String with all values from this Parameters object, in 2477 * semi-colon delimited key-value pairs 2478 */ 2479 public String flatten() { 2480 StringBuilder flattened = new StringBuilder(128); 2481 for (String k : mMap.keySet()) { 2482 flattened.append(k); 2483 flattened.append("="); 2484 flattened.append(mMap.get(k)); 2485 flattened.append(";"); 2486 } 2487 // chop off the extra semicolon at the end 2488 flattened.deleteCharAt(flattened.length()-1); 2489 return flattened.toString(); 2490 } 2491 2492 /** 2493 * Takes a flattened string of parameters and adds each one to 2494 * this Parameters object. 2495 * <p>The {@link #flatten()} method does the reverse.</p> 2496 * 2497 * @param flattened a String of parameters (key-value paired) that 2498 * are semi-colon delimited 2499 */ 2500 public void unflatten(String flattened) { 2501 mMap.clear(); 2502 2503 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(';'); 2504 splitter.setString(flattened); 2505 for (String kv : splitter) { 2506 int pos = kv.indexOf('='); 2507 if (pos == -1) { 2508 continue; 2509 } 2510 String k = kv.substring(0, pos); 2511 String v = kv.substring(pos + 1); 2512 mMap.put(k, v); 2513 } 2514 } 2515 2516 public void remove(String key) { 2517 mMap.remove(key); 2518 } 2519 2520 /** 2521 * Sets a String parameter. 2522 * 2523 * @param key the key name for the parameter 2524 * @param value the String value of the parameter 2525 */ 2526 public void set(String key, String value) { 2527 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 2528 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 2529 return; 2530 } 2531 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 2532 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 2533 return; 2534 } 2535 2536 put(key, value); 2537 } 2538 2539 /** 2540 * Sets an integer parameter. 2541 * 2542 * @param key the key name for the parameter 2543 * @param value the int value of the parameter 2544 */ 2545 public void set(String key, int value) { 2546 put(key, Integer.toString(value)); 2547 } 2548 2549 private void put(String key, String value) { 2550 /* 2551 * Remove the key if it already exists. 2552 * 2553 * This way setting a new value for an already existing key will always move 2554 * that key to be ordered the latest in the map. 2555 */ 2556 mMap.remove(key); 2557 mMap.put(key, value); 2558 } 2559 2560 private void set(String key, List<Area> areas) { 2561 if (areas == null) { 2562 set(key, "(0,0,0,0,0)"); 2563 } else { 2564 StringBuilder buffer = new StringBuilder(); 2565 for (int i = 0; i < areas.size(); i++) { 2566 Area area = areas.get(i); 2567 Rect rect = area.rect; 2568 buffer.append('('); 2569 buffer.append(rect.left); 2570 buffer.append(','); 2571 buffer.append(rect.top); 2572 buffer.append(','); 2573 buffer.append(rect.right); 2574 buffer.append(','); 2575 buffer.append(rect.bottom); 2576 buffer.append(','); 2577 buffer.append(area.weight); 2578 buffer.append(')'); 2579 if (i != areas.size() - 1) buffer.append(','); 2580 } 2581 set(key, buffer.toString()); 2582 } 2583 } 2584 2585 /** 2586 * Returns the value of a String parameter. 2587 * 2588 * @param key the key name for the parameter 2589 * @return the String value of the parameter 2590 */ 2591 public String get(String key) { 2592 return mMap.get(key); 2593 } 2594 2595 /** 2596 * Returns the value of an integer parameter. 2597 * 2598 * @param key the key name for the parameter 2599 * @return the int value of the parameter 2600 */ 2601 public int getInt(String key) { 2602 return Integer.parseInt(mMap.get(key)); 2603 } 2604 2605 /** 2606 * Sets the dimensions for preview pictures. If the preview has already 2607 * started, applications should stop the preview first before changing 2608 * preview size. 2609 * 2610 * The sides of width and height are based on camera orientation. That 2611 * is, the preview size is the size before it is rotated by display 2612 * orientation. So applications need to consider the display orientation 2613 * while setting preview size. For example, suppose the camera supports 2614 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2615 * preview ratio. If the display orientation is set to 0 or 180, preview 2616 * size should be set to 480x320. If the display orientation is set to 2617 * 90 or 270, preview size should be set to 320x480. The display 2618 * orientation should also be considered while setting picture size and 2619 * thumbnail size. 2620 * 2621 * @param width the width of the pictures, in pixels 2622 * @param height the height of the pictures, in pixels 2623 * @see #setDisplayOrientation(int) 2624 * @see #getCameraInfo(int, CameraInfo) 2625 * @see #setPictureSize(int, int) 2626 * @see #setJpegThumbnailSize(int, int) 2627 */ 2628 public void setPreviewSize(int width, int height) { 2629 String v = Integer.toString(width) + "x" + Integer.toString(height); 2630 set(KEY_PREVIEW_SIZE, v); 2631 } 2632 2633 /** 2634 * Returns the dimensions setting for preview pictures. 2635 * 2636 * @return a Size object with the width and height setting 2637 * for the preview picture 2638 */ 2639 public Size getPreviewSize() { 2640 String pair = get(KEY_PREVIEW_SIZE); 2641 return strToSize(pair); 2642 } 2643 2644 /** 2645 * Gets the supported preview sizes. 2646 * 2647 * @return a list of Size object. This method will always return a list 2648 * with at least one element. 2649 */ 2650 public List<Size> getSupportedPreviewSizes() { 2651 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2652 return splitSize(str); 2653 } 2654 2655 /** 2656 * <p>Gets the supported video frame sizes that can be used by 2657 * MediaRecorder.</p> 2658 * 2659 * <p>If the returned list is not null, the returned list will contain at 2660 * least one Size and one of the sizes in the returned list must be 2661 * passed to MediaRecorder.setVideoSize() for camcorder application if 2662 * camera is used as the video source. In this case, the size of the 2663 * preview can be different from the resolution of the recorded video 2664 * during video recording.</p> 2665 * 2666 * @return a list of Size object if camera has separate preview and 2667 * video output; otherwise, null is returned. 2668 * @see #getPreferredPreviewSizeForVideo() 2669 */ 2670 public List<Size> getSupportedVideoSizes() { 2671 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2672 return splitSize(str); 2673 } 2674 2675 /** 2676 * Returns the preferred or recommended preview size (width and height) 2677 * in pixels for video recording. Camcorder applications should 2678 * set the preview size to a value that is not larger than the 2679 * preferred preview size. In other words, the product of the width 2680 * and height of the preview size should not be larger than that of 2681 * the preferred preview size. In addition, we recommend to choose a 2682 * preview size that has the same aspect ratio as the resolution of 2683 * video to be recorded. 2684 * 2685 * @return the preferred preview size (width and height) in pixels for 2686 * video recording if getSupportedVideoSizes() does not return 2687 * null; otherwise, null is returned. 2688 * @see #getSupportedVideoSizes() 2689 */ 2690 public Size getPreferredPreviewSizeForVideo() { 2691 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2692 return strToSize(pair); 2693 } 2694 2695 /** 2696 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2697 * applications set both width and height to 0, EXIF will not contain 2698 * thumbnail.</p> 2699 * 2700 * <p>Applications need to consider the display orientation. See {@link 2701 * #setPreviewSize(int,int)} for reference.</p> 2702 * 2703 * @param width the width of the thumbnail, in pixels 2704 * @param height the height of the thumbnail, in pixels 2705 * @see #setPreviewSize(int,int) 2706 */ 2707 public void setJpegThumbnailSize(int width, int height) { 2708 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2709 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2710 } 2711 2712 /** 2713 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2714 * 2715 * @return a Size object with the height and width setting for the EXIF 2716 * thumbnails 2717 */ 2718 public Size getJpegThumbnailSize() { 2719 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2720 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2721 } 2722 2723 /** 2724 * Gets the supported jpeg thumbnail sizes. 2725 * 2726 * @return a list of Size object. This method will always return a list 2727 * with at least two elements. Size 0,0 (no thumbnail) is always 2728 * supported. 2729 */ 2730 public List<Size> getSupportedJpegThumbnailSizes() { 2731 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2732 return splitSize(str); 2733 } 2734 2735 /** 2736 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2737 * 2738 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2739 * to 100, with 100 being the best. 2740 */ 2741 public void setJpegThumbnailQuality(int quality) { 2742 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2743 } 2744 2745 /** 2746 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2747 * 2748 * @return the JPEG quality setting of the EXIF thumbnail. 2749 */ 2750 public int getJpegThumbnailQuality() { 2751 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2752 } 2753 2754 /** 2755 * Sets Jpeg quality of captured picture. 2756 * 2757 * @param quality the JPEG quality of captured picture. The range is 1 2758 * to 100, with 100 being the best. 2759 */ 2760 public void setJpegQuality(int quality) { 2761 set(KEY_JPEG_QUALITY, quality); 2762 } 2763 2764 /** 2765 * Returns the quality setting for the JPEG picture. 2766 * 2767 * @return the JPEG picture quality setting. 2768 */ 2769 public int getJpegQuality() { 2770 return getInt(KEY_JPEG_QUALITY); 2771 } 2772 2773 /** 2774 * Sets the rate at which preview frames are received. This is the 2775 * target frame rate. The actual frame rate depends on the driver. 2776 * 2777 * @param fps the frame rate (frames per second) 2778 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2779 */ 2780 @Deprecated 2781 public void setPreviewFrameRate(int fps) { 2782 set(KEY_PREVIEW_FRAME_RATE, fps); 2783 } 2784 2785 /** 2786 * Returns the setting for the rate at which preview frames are 2787 * received. This is the target frame rate. The actual frame rate 2788 * depends on the driver. 2789 * 2790 * @return the frame rate setting (frames per second) 2791 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2792 */ 2793 @Deprecated 2794 public int getPreviewFrameRate() { 2795 return getInt(KEY_PREVIEW_FRAME_RATE); 2796 } 2797 2798 /** 2799 * Gets the supported preview frame rates. 2800 * 2801 * @return a list of supported preview frame rates. null if preview 2802 * frame rate setting is not supported. 2803 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2804 */ 2805 @Deprecated 2806 public List<Integer> getSupportedPreviewFrameRates() { 2807 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2808 return splitInt(str); 2809 } 2810 2811 /** 2812 * Sets the minimum and maximum preview fps. This controls the rate of 2813 * preview frames received in {@link PreviewCallback}. The minimum and 2814 * maximum preview fps must be one of the elements from {@link 2815 * #getSupportedPreviewFpsRange}. 2816 * 2817 * @param min the minimum preview fps (scaled by 1000). 2818 * @param max the maximum preview fps (scaled by 1000). 2819 * @throws RuntimeException if fps range is invalid. 2820 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2821 * @see #getSupportedPreviewFpsRange() 2822 */ 2823 public void setPreviewFpsRange(int min, int max) { 2824 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2825 } 2826 2827 /** 2828 * Returns the current minimum and maximum preview fps. The values are 2829 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2830 * 2831 * @return range the minimum and maximum preview fps (scaled by 1000). 2832 * @see #PREVIEW_FPS_MIN_INDEX 2833 * @see #PREVIEW_FPS_MAX_INDEX 2834 * @see #getSupportedPreviewFpsRange() 2835 */ 2836 public void getPreviewFpsRange(int[] range) { 2837 if (range == null || range.length != 2) { 2838 throw new IllegalArgumentException( 2839 "range must be an array with two elements."); 2840 } 2841 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2842 } 2843 2844 /** 2845 * Gets the supported preview fps (frame-per-second) ranges. Each range 2846 * contains a minimum fps and maximum fps. If minimum fps equals to 2847 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2848 * the camera outputs frames in auto frame rate. The actual frame rate 2849 * fluctuates between the minimum and the maximum. The values are 2850 * multiplied by 1000 and represented in integers. For example, if frame 2851 * rate is 26.623 frames per second, the value is 26623. 2852 * 2853 * @return a list of supported preview fps ranges. This method returns a 2854 * list with at least one element. Every element is an int array 2855 * of two values - minimum fps and maximum fps. The list is 2856 * sorted from small to large (first by maximum fps and then 2857 * minimum fps). 2858 * @see #PREVIEW_FPS_MIN_INDEX 2859 * @see #PREVIEW_FPS_MAX_INDEX 2860 */ 2861 public List<int[]> getSupportedPreviewFpsRange() { 2862 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2863 return splitRange(str); 2864 } 2865 2866 /** 2867 * Sets the image format for preview pictures. 2868 * <p>If this is never called, the default format will be 2869 * {@link android.graphics.ImageFormat#NV21}, which 2870 * uses the NV21 encoding format.</p> 2871 * 2872 * <p>Use {@link Parameters#getSupportedPreviewFormats} to get a list of 2873 * the available preview formats. 2874 * 2875 * <p>It is strongly recommended that either 2876 * {@link android.graphics.ImageFormat#NV21} or 2877 * {@link android.graphics.ImageFormat#YV12} is used, since 2878 * they are supported by all camera devices.</p> 2879 * 2880 * <p>For YV12, the image buffer that is received is not necessarily 2881 * tightly packed, as there may be padding at the end of each row of 2882 * pixel data, as described in 2883 * {@link android.graphics.ImageFormat#YV12}. For camera callback data, 2884 * it can be assumed that the stride of the Y and UV data is the 2885 * smallest possible that meets the alignment requirements. That is, if 2886 * the preview size is <var>width x height</var>, then the following 2887 * equations describe the buffer index for the beginning of row 2888 * <var>y</var> for the Y plane and row <var>c</var> for the U and V 2889 * planes: 2890 * 2891 * {@code 2892 * <pre> 2893 * yStride = (int) ceil(width / 16.0) * 16; 2894 * uvStride = (int) ceil( (yStride / 2) / 16.0) * 16; 2895 * ySize = yStride * height; 2896 * uvSize = uvStride * height / 2; 2897 * yRowIndex = yStride * y; 2898 * uRowIndex = ySize + uvSize + uvStride * c; 2899 * vRowIndex = ySize + uvStride * c; 2900 * size = ySize + uvSize * 2;</pre> 2901 * } 2902 * 2903 * @param pixel_format the desired preview picture format, defined by 2904 * one of the {@link android.graphics.ImageFormat} constants. (E.g., 2905 * <var>ImageFormat.NV21</var> (default), or 2906 * <var>ImageFormat.YV12</var>) 2907 * 2908 * @see android.graphics.ImageFormat 2909 * @see android.hardware.Camera.Parameters#getSupportedPreviewFormats 2910 */ 2911 public void setPreviewFormat(int pixel_format) { 2912 String s = cameraFormatForPixelFormat(pixel_format); 2913 if (s == null) { 2914 throw new IllegalArgumentException( 2915 "Invalid pixel_format=" + pixel_format); 2916 } 2917 2918 set(KEY_PREVIEW_FORMAT, s); 2919 } 2920 2921 /** 2922 * Returns the image format for preview frames got from 2923 * {@link PreviewCallback}. 2924 * 2925 * @return the preview format. 2926 * @see android.graphics.ImageFormat 2927 * @see #setPreviewFormat 2928 */ 2929 public int getPreviewFormat() { 2930 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2931 } 2932 2933 /** 2934 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2935 * is always supported. {@link android.graphics.ImageFormat#YV12} 2936 * is always supported since API level 12. 2937 * 2938 * @return a list of supported preview formats. This method will always 2939 * return a list with at least one element. 2940 * @see android.graphics.ImageFormat 2941 * @see #setPreviewFormat 2942 */ 2943 public List<Integer> getSupportedPreviewFormats() { 2944 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2945 ArrayList<Integer> formats = new ArrayList<Integer>(); 2946 for (String s : split(str)) { 2947 int f = pixelFormatForCameraFormat(s); 2948 if (f == ImageFormat.UNKNOWN) continue; 2949 formats.add(f); 2950 } 2951 return formats; 2952 } 2953 2954 /** 2955 * <p>Sets the dimensions for pictures.</p> 2956 * 2957 * <p>Applications need to consider the display orientation. See {@link 2958 * #setPreviewSize(int,int)} for reference.</p> 2959 * 2960 * @param width the width for pictures, in pixels 2961 * @param height the height for pictures, in pixels 2962 * @see #setPreviewSize(int,int) 2963 * 2964 */ 2965 public void setPictureSize(int width, int height) { 2966 String v = Integer.toString(width) + "x" + Integer.toString(height); 2967 set(KEY_PICTURE_SIZE, v); 2968 } 2969 2970 /** 2971 * Returns the dimension setting for pictures. 2972 * 2973 * @return a Size object with the height and width setting 2974 * for pictures 2975 */ 2976 public Size getPictureSize() { 2977 String pair = get(KEY_PICTURE_SIZE); 2978 return strToSize(pair); 2979 } 2980 2981 /** 2982 * Gets the supported picture sizes. 2983 * 2984 * @return a list of supported picture sizes. This method will always 2985 * return a list with at least one element. 2986 */ 2987 public List<Size> getSupportedPictureSizes() { 2988 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2989 return splitSize(str); 2990 } 2991 2992 /** 2993 * Sets the image format for pictures. 2994 * 2995 * @param pixel_format the desired picture format 2996 * (<var>ImageFormat.NV21</var>, 2997 * <var>ImageFormat.RGB_565</var>, or 2998 * <var>ImageFormat.JPEG</var>) 2999 * @see android.graphics.ImageFormat 3000 */ 3001 public void setPictureFormat(int pixel_format) { 3002 String s = cameraFormatForPixelFormat(pixel_format); 3003 if (s == null) { 3004 throw new IllegalArgumentException( 3005 "Invalid pixel_format=" + pixel_format); 3006 } 3007 3008 set(KEY_PICTURE_FORMAT, s); 3009 } 3010 3011 /** 3012 * Returns the image format for pictures. 3013 * 3014 * @return the picture format 3015 * @see android.graphics.ImageFormat 3016 */ 3017 public int getPictureFormat() { 3018 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 3019 } 3020 3021 /** 3022 * Gets the supported picture formats. 3023 * 3024 * @return supported picture formats. This method will always return a 3025 * list with at least one element. 3026 * @see android.graphics.ImageFormat 3027 */ 3028 public List<Integer> getSupportedPictureFormats() { 3029 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 3030 ArrayList<Integer> formats = new ArrayList<Integer>(); 3031 for (String s : split(str)) { 3032 int f = pixelFormatForCameraFormat(s); 3033 if (f == ImageFormat.UNKNOWN) continue; 3034 formats.add(f); 3035 } 3036 return formats; 3037 } 3038 3039 private String cameraFormatForPixelFormat(int pixel_format) { 3040 switch(pixel_format) { 3041 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 3042 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 3043 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 3044 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 3045 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 3046 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 3047 default: return null; 3048 } 3049 } 3050 3051 private int pixelFormatForCameraFormat(String format) { 3052 if (format == null) 3053 return ImageFormat.UNKNOWN; 3054 3055 if (format.equals(PIXEL_FORMAT_YUV422SP)) 3056 return ImageFormat.NV16; 3057 3058 if (format.equals(PIXEL_FORMAT_YUV420SP)) 3059 return ImageFormat.NV21; 3060 3061 if (format.equals(PIXEL_FORMAT_YUV422I)) 3062 return ImageFormat.YUY2; 3063 3064 if (format.equals(PIXEL_FORMAT_YUV420P)) 3065 return ImageFormat.YV12; 3066 3067 if (format.equals(PIXEL_FORMAT_RGB565)) 3068 return ImageFormat.RGB_565; 3069 3070 if (format.equals(PIXEL_FORMAT_JPEG)) 3071 return ImageFormat.JPEG; 3072 3073 return ImageFormat.UNKNOWN; 3074 } 3075 3076 /** 3077 * Sets the clockwise rotation angle in degrees relative to the 3078 * orientation of the camera. This affects the pictures returned from 3079 * JPEG {@link PictureCallback}. The camera driver may set orientation 3080 * in the EXIF header without rotating the picture. Or the driver may 3081 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 3082 * rotated, the orientation in the EXIF header will be missing or 1 (row 3083 * #0 is top and column #0 is left side). 3084 * 3085 * <p> 3086 * If applications want to rotate the picture to match the orientation 3087 * of what users see, apps should use 3088 * {@link android.view.OrientationEventListener} and 3089 * {@link android.hardware.Camera.CameraInfo}. The value from 3090 * OrientationEventListener is relative to the natural orientation of 3091 * the device. CameraInfo.orientation is the angle between camera 3092 * orientation and natural device orientation. The sum of the two is the 3093 * rotation angle for back-facing camera. The difference of the two is 3094 * the rotation angle for front-facing camera. Note that the JPEG 3095 * pictures of front-facing cameras are not mirrored as in preview 3096 * display. 3097 * 3098 * <p> 3099 * For example, suppose the natural orientation of the device is 3100 * portrait. The device is rotated 270 degrees clockwise, so the device 3101 * orientation is 270. Suppose a back-facing camera sensor is mounted in 3102 * landscape and the top side of the camera sensor is aligned with the 3103 * right edge of the display in natural orientation. So the camera 3104 * orientation is 90. The rotation should be set to 0 (270 + 90). 3105 * 3106 * <p>The reference code is as follows. 3107 * 3108 * <pre> 3109 * public void onOrientationChanged(int orientation) { 3110 * if (orientation == ORIENTATION_UNKNOWN) return; 3111 * android.hardware.Camera.CameraInfo info = 3112 * new android.hardware.Camera.CameraInfo(); 3113 * android.hardware.Camera.getCameraInfo(cameraId, info); 3114 * orientation = (orientation + 45) / 90 * 90; 3115 * int rotation = 0; 3116 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 3117 * rotation = (info.orientation - orientation + 360) % 360; 3118 * } else { // back-facing camera 3119 * rotation = (info.orientation + orientation) % 360; 3120 * } 3121 * mParameters.setRotation(rotation); 3122 * } 3123 * </pre> 3124 * 3125 * @param rotation The rotation angle in degrees relative to the 3126 * orientation of the camera. Rotation can only be 0, 3127 * 90, 180 or 270. 3128 * @throws IllegalArgumentException if rotation value is invalid. 3129 * @see android.view.OrientationEventListener 3130 * @see #getCameraInfo(int, CameraInfo) 3131 */ 3132 public void setRotation(int rotation) { 3133 if (rotation == 0 || rotation == 90 || rotation == 180 3134 || rotation == 270) { 3135 set(KEY_ROTATION, Integer.toString(rotation)); 3136 } else { 3137 throw new IllegalArgumentException( 3138 "Invalid rotation=" + rotation); 3139 } 3140 } 3141 3142 /** 3143 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 3144 * header. 3145 * 3146 * @param latitude GPS latitude coordinate. 3147 */ 3148 public void setGpsLatitude(double latitude) { 3149 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 3150 } 3151 3152 /** 3153 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 3154 * header. 3155 * 3156 * @param longitude GPS longitude coordinate. 3157 */ 3158 public void setGpsLongitude(double longitude) { 3159 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 3160 } 3161 3162 /** 3163 * Sets GPS altitude. This will be stored in JPEG EXIF header. 3164 * 3165 * @param altitude GPS altitude in meters. 3166 */ 3167 public void setGpsAltitude(double altitude) { 3168 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 3169 } 3170 3171 /** 3172 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 3173 * 3174 * @param timestamp GPS timestamp (UTC in seconds since January 1, 3175 * 1970). 3176 */ 3177 public void setGpsTimestamp(long timestamp) { 3178 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 3179 } 3180 3181 /** 3182 * Sets GPS processing method. It will store up to 32 characters 3183 * in JPEG EXIF header. 3184 * 3185 * @param processing_method The processing method to get this location. 3186 */ 3187 public void setGpsProcessingMethod(String processing_method) { 3188 set(KEY_GPS_PROCESSING_METHOD, processing_method); 3189 } 3190 3191 /** 3192 * Removes GPS latitude, longitude, altitude, and timestamp from the 3193 * parameters. 3194 */ 3195 public void removeGpsData() { 3196 remove(KEY_GPS_LATITUDE); 3197 remove(KEY_GPS_LONGITUDE); 3198 remove(KEY_GPS_ALTITUDE); 3199 remove(KEY_GPS_TIMESTAMP); 3200 remove(KEY_GPS_PROCESSING_METHOD); 3201 } 3202 3203 /** 3204 * Gets the current white balance setting. 3205 * 3206 * @return current white balance. null if white balance setting is not 3207 * supported. 3208 * @see #WHITE_BALANCE_AUTO 3209 * @see #WHITE_BALANCE_INCANDESCENT 3210 * @see #WHITE_BALANCE_FLUORESCENT 3211 * @see #WHITE_BALANCE_WARM_FLUORESCENT 3212 * @see #WHITE_BALANCE_DAYLIGHT 3213 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 3214 * @see #WHITE_BALANCE_TWILIGHT 3215 * @see #WHITE_BALANCE_SHADE 3216 * 3217 */ 3218 public String getWhiteBalance() { 3219 return get(KEY_WHITE_BALANCE); 3220 } 3221 3222 /** 3223 * Sets the white balance. Changing the setting will release the 3224 * auto-white balance lock. It is recommended not to change white 3225 * balance and AWB lock at the same time. 3226 * 3227 * @param value new white balance. 3228 * @see #getWhiteBalance() 3229 * @see #setAutoWhiteBalanceLock(boolean) 3230 */ 3231 public void setWhiteBalance(String value) { 3232 String oldValue = get(KEY_WHITE_BALANCE); 3233 if (same(value, oldValue)) return; 3234 set(KEY_WHITE_BALANCE, value); 3235 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 3236 } 3237 3238 /** 3239 * Gets the supported white balance. 3240 * 3241 * @return a list of supported white balance. null if white balance 3242 * setting is not supported. 3243 * @see #getWhiteBalance() 3244 */ 3245 public List<String> getSupportedWhiteBalance() { 3246 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 3247 return split(str); 3248 } 3249 3250 /** 3251 * Gets the current color effect setting. 3252 * 3253 * @return current color effect. null if color effect 3254 * setting is not supported. 3255 * @see #EFFECT_NONE 3256 * @see #EFFECT_MONO 3257 * @see #EFFECT_NEGATIVE 3258 * @see #EFFECT_SOLARIZE 3259 * @see #EFFECT_SEPIA 3260 * @see #EFFECT_POSTERIZE 3261 * @see #EFFECT_WHITEBOARD 3262 * @see #EFFECT_BLACKBOARD 3263 * @see #EFFECT_AQUA 3264 */ 3265 public String getColorEffect() { 3266 return get(KEY_EFFECT); 3267 } 3268 3269 /** 3270 * Sets the current color effect setting. 3271 * 3272 * @param value new color effect. 3273 * @see #getColorEffect() 3274 */ 3275 public void setColorEffect(String value) { 3276 set(KEY_EFFECT, value); 3277 } 3278 3279 /** 3280 * Gets the supported color effects. 3281 * 3282 * @return a list of supported color effects. null if color effect 3283 * setting is not supported. 3284 * @see #getColorEffect() 3285 */ 3286 public List<String> getSupportedColorEffects() { 3287 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 3288 return split(str); 3289 } 3290 3291 3292 /** 3293 * Gets the current antibanding setting. 3294 * 3295 * @return current antibanding. null if antibanding setting is not 3296 * supported. 3297 * @see #ANTIBANDING_AUTO 3298 * @see #ANTIBANDING_50HZ 3299 * @see #ANTIBANDING_60HZ 3300 * @see #ANTIBANDING_OFF 3301 */ 3302 public String getAntibanding() { 3303 return get(KEY_ANTIBANDING); 3304 } 3305 3306 /** 3307 * Sets the antibanding. 3308 * 3309 * @param antibanding new antibanding value. 3310 * @see #getAntibanding() 3311 */ 3312 public void setAntibanding(String antibanding) { 3313 set(KEY_ANTIBANDING, antibanding); 3314 } 3315 3316 /** 3317 * Gets the supported antibanding values. 3318 * 3319 * @return a list of supported antibanding values. null if antibanding 3320 * setting is not supported. 3321 * @see #getAntibanding() 3322 */ 3323 public List<String> getSupportedAntibanding() { 3324 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 3325 return split(str); 3326 } 3327 3328 /** 3329 * Gets the current scene mode setting. 3330 * 3331 * @return one of SCENE_MODE_XXX string constant. null if scene mode 3332 * setting is not supported. 3333 * @see #SCENE_MODE_AUTO 3334 * @see #SCENE_MODE_ACTION 3335 * @see #SCENE_MODE_PORTRAIT 3336 * @see #SCENE_MODE_LANDSCAPE 3337 * @see #SCENE_MODE_NIGHT 3338 * @see #SCENE_MODE_NIGHT_PORTRAIT 3339 * @see #SCENE_MODE_THEATRE 3340 * @see #SCENE_MODE_BEACH 3341 * @see #SCENE_MODE_SNOW 3342 * @see #SCENE_MODE_SUNSET 3343 * @see #SCENE_MODE_STEADYPHOTO 3344 * @see #SCENE_MODE_FIREWORKS 3345 * @see #SCENE_MODE_SPORTS 3346 * @see #SCENE_MODE_PARTY 3347 * @see #SCENE_MODE_CANDLELIGHT 3348 * @see #SCENE_MODE_BARCODE 3349 */ 3350 public String getSceneMode() { 3351 return get(KEY_SCENE_MODE); 3352 } 3353 3354 /** 3355 * Sets the scene mode. Changing scene mode may override other 3356 * parameters (such as flash mode, focus mode, white balance). For 3357 * example, suppose originally flash mode is on and supported flash 3358 * modes are on/off. In night scene mode, both flash mode and supported 3359 * flash mode may be changed to off. After setting scene mode, 3360 * applications should call getParameters to know if some parameters are 3361 * changed. 3362 * 3363 * @param value scene mode. 3364 * @see #getSceneMode() 3365 */ 3366 public void setSceneMode(String value) { 3367 set(KEY_SCENE_MODE, value); 3368 } 3369 3370 /** 3371 * Gets the supported scene modes. 3372 * 3373 * @return a list of supported scene modes. null if scene mode setting 3374 * is not supported. 3375 * @see #getSceneMode() 3376 */ 3377 public List<String> getSupportedSceneModes() { 3378 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 3379 return split(str); 3380 } 3381 3382 /** 3383 * Gets the current flash mode setting. 3384 * 3385 * @return current flash mode. null if flash mode setting is not 3386 * supported. 3387 * @see #FLASH_MODE_OFF 3388 * @see #FLASH_MODE_AUTO 3389 * @see #FLASH_MODE_ON 3390 * @see #FLASH_MODE_RED_EYE 3391 * @see #FLASH_MODE_TORCH 3392 */ 3393 public String getFlashMode() { 3394 return get(KEY_FLASH_MODE); 3395 } 3396 3397 /** 3398 * Sets the flash mode. 3399 * 3400 * @param value flash mode. 3401 * @see #getFlashMode() 3402 */ 3403 public void setFlashMode(String value) { 3404 set(KEY_FLASH_MODE, value); 3405 } 3406 3407 /** 3408 * Gets the supported flash modes. 3409 * 3410 * @return a list of supported flash modes. null if flash mode setting 3411 * is not supported. 3412 * @see #getFlashMode() 3413 */ 3414 public List<String> getSupportedFlashModes() { 3415 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 3416 return split(str); 3417 } 3418 3419 /** 3420 * Gets the current focus mode setting. 3421 * 3422 * @return current focus mode. This method will always return a non-null 3423 * value. Applications should call {@link 3424 * #autoFocus(AutoFocusCallback)} to start the focus if focus 3425 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 3426 * @see #FOCUS_MODE_AUTO 3427 * @see #FOCUS_MODE_INFINITY 3428 * @see #FOCUS_MODE_MACRO 3429 * @see #FOCUS_MODE_FIXED 3430 * @see #FOCUS_MODE_EDOF 3431 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 3432 */ 3433 public String getFocusMode() { 3434 return get(KEY_FOCUS_MODE); 3435 } 3436 3437 /** 3438 * Sets the focus mode. 3439 * 3440 * @param value focus mode. 3441 * @see #getFocusMode() 3442 */ 3443 public void setFocusMode(String value) { 3444 set(KEY_FOCUS_MODE, value); 3445 } 3446 3447 /** 3448 * Gets the supported focus modes. 3449 * 3450 * @return a list of supported focus modes. This method will always 3451 * return a list with at least one element. 3452 * @see #getFocusMode() 3453 */ 3454 public List<String> getSupportedFocusModes() { 3455 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 3456 return split(str); 3457 } 3458 3459 /** 3460 * Gets the focal length (in millimeter) of the camera. 3461 * 3462 * @return the focal length. This method will always return a valid 3463 * value. 3464 */ 3465 public float getFocalLength() { 3466 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 3467 } 3468 3469 /** 3470 * Gets the horizontal angle of view in degrees. 3471 * 3472 * @return horizontal angle of view. This method will always return a 3473 * valid value. 3474 */ 3475 public float getHorizontalViewAngle() { 3476 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 3477 } 3478 3479 /** 3480 * Gets the vertical angle of view in degrees. 3481 * 3482 * @return vertical angle of view. This method will always return a 3483 * valid value. 3484 */ 3485 public float getVerticalViewAngle() { 3486 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 3487 } 3488 3489 /** 3490 * Gets the current exposure compensation index. 3491 * 3492 * @return current exposure compensation index. The range is {@link 3493 * #getMinExposureCompensation} to {@link 3494 * #getMaxExposureCompensation}. 0 means exposure is not 3495 * adjusted. 3496 */ 3497 public int getExposureCompensation() { 3498 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 3499 } 3500 3501 /** 3502 * Sets the exposure compensation index. 3503 * 3504 * @param value exposure compensation index. The valid value range is 3505 * from {@link #getMinExposureCompensation} (inclusive) to {@link 3506 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 3507 * not adjusted. Application should call 3508 * getMinExposureCompensation and getMaxExposureCompensation to 3509 * know if exposure compensation is supported. 3510 */ 3511 public void setExposureCompensation(int value) { 3512 set(KEY_EXPOSURE_COMPENSATION, value); 3513 } 3514 3515 /** 3516 * Gets the maximum exposure compensation index. 3517 * 3518 * @return maximum exposure compensation index (>=0). If both this 3519 * method and {@link #getMinExposureCompensation} return 0, 3520 * exposure compensation is not supported. 3521 */ 3522 public int getMaxExposureCompensation() { 3523 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 3524 } 3525 3526 /** 3527 * Gets the minimum exposure compensation index. 3528 * 3529 * @return minimum exposure compensation index (<=0). If both this 3530 * method and {@link #getMaxExposureCompensation} return 0, 3531 * exposure compensation is not supported. 3532 */ 3533 public int getMinExposureCompensation() { 3534 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 3535 } 3536 3537 /** 3538 * Gets the exposure compensation step. 3539 * 3540 * @return exposure compensation step. Applications can get EV by 3541 * multiplying the exposure compensation index and step. Ex: if 3542 * exposure compensation index is -6 and step is 0.333333333, EV 3543 * is -2. 3544 */ 3545 public float getExposureCompensationStep() { 3546 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 3547 } 3548 3549 /** 3550 * <p>Sets the auto-exposure lock state. Applications should check 3551 * {@link #isAutoExposureLockSupported} before using this method.</p> 3552 * 3553 * <p>If set to true, the camera auto-exposure routine will immediately 3554 * pause until the lock is set to false. Exposure compensation settings 3555 * changes will still take effect while auto-exposure is locked.</p> 3556 * 3557 * <p>If auto-exposure is already locked, setting this to true again has 3558 * no effect (the driver will not recalculate exposure values).</p> 3559 * 3560 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3561 * image capture with {@link #takePicture(Camera.ShutterCallback, 3562 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3563 * lock.</p> 3564 * 3565 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 3566 * lock can be used to capture an exposure-bracketed burst of images, 3567 * for example.</p> 3568 * 3569 * <p>Auto-exposure state, including the lock state, will not be 3570 * maintained after camera {@link #release()} is called. Locking 3571 * auto-exposure after {@link #open()} but before the first call to 3572 * {@link #startPreview()} will not allow the auto-exposure routine to 3573 * run at all, and may result in severely over- or under-exposed 3574 * images.</p> 3575 * 3576 * @param toggle new state of the auto-exposure lock. True means that 3577 * auto-exposure is locked, false means that the auto-exposure 3578 * routine is free to run normally. 3579 * 3580 * @see #getAutoExposureLock() 3581 */ 3582 public void setAutoExposureLock(boolean toggle) { 3583 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 3584 } 3585 3586 /** 3587 * Gets the state of the auto-exposure lock. Applications should check 3588 * {@link #isAutoExposureLockSupported} before using this method. See 3589 * {@link #setAutoExposureLock} for details about the lock. 3590 * 3591 * @return State of the auto-exposure lock. Returns true if 3592 * auto-exposure is currently locked, and false otherwise. 3593 * 3594 * @see #setAutoExposureLock(boolean) 3595 * 3596 */ 3597 public boolean getAutoExposureLock() { 3598 String str = get(KEY_AUTO_EXPOSURE_LOCK); 3599 return TRUE.equals(str); 3600 } 3601 3602 /** 3603 * Returns true if auto-exposure locking is supported. Applications 3604 * should call this before trying to lock auto-exposure. See 3605 * {@link #setAutoExposureLock} for details about the lock. 3606 * 3607 * @return true if auto-exposure lock is supported. 3608 * @see #setAutoExposureLock(boolean) 3609 * 3610 */ 3611 public boolean isAutoExposureLockSupported() { 3612 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 3613 return TRUE.equals(str); 3614 } 3615 3616 /** 3617 * <p>Sets the auto-white balance lock state. Applications should check 3618 * {@link #isAutoWhiteBalanceLockSupported} before using this 3619 * method.</p> 3620 * 3621 * <p>If set to true, the camera auto-white balance routine will 3622 * immediately pause until the lock is set to false.</p> 3623 * 3624 * <p>If auto-white balance is already locked, setting this to true 3625 * again has no effect (the driver will not recalculate white balance 3626 * values).</p> 3627 * 3628 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3629 * image capture with {@link #takePicture(Camera.ShutterCallback, 3630 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3631 * the lock.</p> 3632 * 3633 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3634 * will release the auto-white balance lock if it is set.</p> 3635 * 3636 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3637 * capture an exposure-bracketed burst of images, for example. 3638 * Auto-white balance state, including the lock state, will not be 3639 * maintained after camera {@link #release()} is called. Locking 3640 * auto-white balance after {@link #open()} but before the first call to 3641 * {@link #startPreview()} will not allow the auto-white balance routine 3642 * to run at all, and may result in severely incorrect color in captured 3643 * images.</p> 3644 * 3645 * @param toggle new state of the auto-white balance lock. True means 3646 * that auto-white balance is locked, false means that the 3647 * auto-white balance routine is free to run normally. 3648 * 3649 * @see #getAutoWhiteBalanceLock() 3650 * @see #setWhiteBalance(String) 3651 */ 3652 public void setAutoWhiteBalanceLock(boolean toggle) { 3653 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3654 } 3655 3656 /** 3657 * Gets the state of the auto-white balance lock. Applications should 3658 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3659 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3660 * lock. 3661 * 3662 * @return State of the auto-white balance lock. Returns true if 3663 * auto-white balance is currently locked, and false 3664 * otherwise. 3665 * 3666 * @see #setAutoWhiteBalanceLock(boolean) 3667 * 3668 */ 3669 public boolean getAutoWhiteBalanceLock() { 3670 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3671 return TRUE.equals(str); 3672 } 3673 3674 /** 3675 * Returns true if auto-white balance locking is supported. Applications 3676 * should call this before trying to lock auto-white balance. See 3677 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3678 * 3679 * @return true if auto-white balance lock is supported. 3680 * @see #setAutoWhiteBalanceLock(boolean) 3681 * 3682 */ 3683 public boolean isAutoWhiteBalanceLockSupported() { 3684 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3685 return TRUE.equals(str); 3686 } 3687 3688 /** 3689 * Gets current zoom value. This also works when smooth zoom is in 3690 * progress. Applications should check {@link #isZoomSupported} before 3691 * using this method. 3692 * 3693 * @return the current zoom value. The range is 0 to {@link 3694 * #getMaxZoom}. 0 means the camera is not zoomed. 3695 */ 3696 public int getZoom() { 3697 return getInt(KEY_ZOOM, 0); 3698 } 3699 3700 /** 3701 * Sets current zoom value. If the camera is zoomed (value > 0), the 3702 * actual picture size may be smaller than picture size setting. 3703 * Applications can check the actual picture size after picture is 3704 * returned from {@link PictureCallback}. The preview size remains the 3705 * same in zoom. Applications should check {@link #isZoomSupported} 3706 * before using this method. 3707 * 3708 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3709 */ 3710 public void setZoom(int value) { 3711 set(KEY_ZOOM, value); 3712 } 3713 3714 /** 3715 * Returns true if zoom is supported. Applications should call this 3716 * before using other zoom methods. 3717 * 3718 * @return true if zoom is supported. 3719 */ 3720 public boolean isZoomSupported() { 3721 String str = get(KEY_ZOOM_SUPPORTED); 3722 return TRUE.equals(str); 3723 } 3724 3725 /** 3726 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3727 * value that applications can set to {@link #setZoom(int)}. 3728 * Applications should call {@link #isZoomSupported} before using this 3729 * method. This value may change in different preview size. Applications 3730 * should call this again after setting preview size. 3731 * 3732 * @return the maximum zoom value supported by the camera. 3733 */ 3734 public int getMaxZoom() { 3735 return getInt(KEY_MAX_ZOOM, 0); 3736 } 3737 3738 /** 3739 * Gets the zoom ratios of all zoom values. Applications should check 3740 * {@link #isZoomSupported} before using this method. 3741 * 3742 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3743 * returned as 320. The number of elements is {@link 3744 * #getMaxZoom} + 1. The list is sorted from small to large. The 3745 * first element is always 100. The last element is the zoom 3746 * ratio of the maximum zoom value. 3747 */ 3748 public List<Integer> getZoomRatios() { 3749 return splitInt(get(KEY_ZOOM_RATIOS)); 3750 } 3751 3752 /** 3753 * Returns true if smooth zoom is supported. Applications should call 3754 * this before using other smooth zoom methods. 3755 * 3756 * @return true if smooth zoom is supported. 3757 */ 3758 public boolean isSmoothZoomSupported() { 3759 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3760 return TRUE.equals(str); 3761 } 3762 3763 /** 3764 * <p>Gets the distances from the camera to where an object appears to be 3765 * in focus. The object is sharpest at the optimal focus distance. The 3766 * depth of field is the far focus distance minus near focus distance.</p> 3767 * 3768 * <p>Focus distances may change after calling {@link 3769 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3770 * #startPreview()}. Applications can call {@link #getParameters()} 3771 * and this method anytime to get the latest focus distances. If the 3772 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3773 * from time to time.</p> 3774 * 3775 * <p>This method is intended to estimate the distance between the camera 3776 * and the subject. After autofocus, the subject distance may be within 3777 * near and far focus distance. However, the precision depends on the 3778 * camera hardware, autofocus algorithm, the focus area, and the scene. 3779 * The error can be large and it should be only used as a reference.</p> 3780 * 3781 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3782 * If the focus distance is infinity, the value will be 3783 * {@code Float.POSITIVE_INFINITY}.</p> 3784 * 3785 * @param output focus distances in meters. output must be a float 3786 * array with three elements. Near focus distance, optimal focus 3787 * distance, and far focus distance will be filled in the array. 3788 * @see #FOCUS_DISTANCE_NEAR_INDEX 3789 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3790 * @see #FOCUS_DISTANCE_FAR_INDEX 3791 */ 3792 public void getFocusDistances(float[] output) { 3793 if (output == null || output.length != 3) { 3794 throw new IllegalArgumentException( 3795 "output must be a float array with three elements."); 3796 } 3797 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3798 } 3799 3800 /** 3801 * Gets the maximum number of focus areas supported. This is the maximum 3802 * length of the list in {@link #setFocusAreas(List)} and 3803 * {@link #getFocusAreas()}. 3804 * 3805 * @return the maximum number of focus areas supported by the camera. 3806 * @see #getFocusAreas() 3807 */ 3808 public int getMaxNumFocusAreas() { 3809 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3810 } 3811 3812 /** 3813 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3814 * focus.</p> 3815 * 3816 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3817 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3818 * focus areas first. If the value is 0, focus area is not supported.</p> 3819 * 3820 * <p>Each focus area is a rectangle with specified weight. The direction 3821 * is relative to the sensor orientation, that is, what the sensor sees. 3822 * The direction is not affected by the rotation or mirroring of 3823 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3824 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3825 * (1000, 1000) is the lower right point. The width and height of focus 3826 * areas cannot be 0 or negative.</p> 3827 * 3828 * <p>The weight must range from 1 to 1000. The weight should be 3829 * interpreted as a per-pixel weight - all pixels in the area have the 3830 * specified weight. This means a small area with the same weight as a 3831 * larger area will have less influence on the focusing than the larger 3832 * area. Focus areas can partially overlap and the driver will add the 3833 * weights in the overlap region.</p> 3834 * 3835 * <p>A special case of a {@code null} focus area list means the driver is 3836 * free to select focus targets as it wants. For example, the driver may 3837 * use more signals to select focus areas and change them 3838 * dynamically. Apps can set the focus area list to {@code null} if they 3839 * want the driver to completely control focusing.</p> 3840 * 3841 * <p>Focus areas are relative to the current field of view 3842 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3843 * represents the top of the currently visible camera frame. The focus 3844 * area cannot be set to be outside the current field of view, even 3845 * when using zoom.</p> 3846 * 3847 * <p>Focus area only has effect if the current focus mode is 3848 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3849 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3850 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3851 * 3852 * @return a list of current focus areas 3853 */ 3854 public List<Area> getFocusAreas() { 3855 return splitArea(get(KEY_FOCUS_AREAS)); 3856 } 3857 3858 /** 3859 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3860 * 3861 * @param focusAreas the focus areas 3862 * @see #getFocusAreas() 3863 */ 3864 public void setFocusAreas(List<Area> focusAreas) { 3865 set(KEY_FOCUS_AREAS, focusAreas); 3866 } 3867 3868 /** 3869 * Gets the maximum number of metering areas supported. This is the 3870 * maximum length of the list in {@link #setMeteringAreas(List)} and 3871 * {@link #getMeteringAreas()}. 3872 * 3873 * @return the maximum number of metering areas supported by the camera. 3874 * @see #getMeteringAreas() 3875 */ 3876 public int getMaxNumMeteringAreas() { 3877 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3878 } 3879 3880 /** 3881 * <p>Gets the current metering areas. Camera driver uses these areas to 3882 * decide exposure.</p> 3883 * 3884 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3885 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3886 * metering areas first. If the value is 0, metering area is not 3887 * supported.</p> 3888 * 3889 * <p>Each metering area is a rectangle with specified weight. The 3890 * direction is relative to the sensor orientation, that is, what the 3891 * sensor sees. The direction is not affected by the rotation or 3892 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3893 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3894 * point. (1000, 1000) is the lower right point. The width and height of 3895 * metering areas cannot be 0 or negative.</p> 3896 * 3897 * <p>The weight must range from 1 to 1000, and represents a weight for 3898 * every pixel in the area. This means that a large metering area with 3899 * the same weight as a smaller area will have more effect in the 3900 * metering result. Metering areas can partially overlap and the driver 3901 * will add the weights in the overlap region.</p> 3902 * 3903 * <p>A special case of a {@code null} metering area list means the driver 3904 * is free to meter as it chooses. For example, the driver may use more 3905 * signals to select metering areas and change them dynamically. Apps 3906 * can set the metering area list to {@code null} if they want the 3907 * driver to completely control metering.</p> 3908 * 3909 * <p>Metering areas are relative to the current field of view 3910 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3911 * represents the top of the currently visible camera frame. The 3912 * metering area cannot be set to be outside the current field of view, 3913 * even when using zoom.</p> 3914 * 3915 * <p>No matter what metering areas are, the final exposure are compensated 3916 * by {@link #setExposureCompensation(int)}.</p> 3917 * 3918 * @return a list of current metering areas 3919 */ 3920 public List<Area> getMeteringAreas() { 3921 return splitArea(get(KEY_METERING_AREAS)); 3922 } 3923 3924 /** 3925 * Sets metering areas. See {@link #getMeteringAreas()} for 3926 * documentation. 3927 * 3928 * @param meteringAreas the metering areas 3929 * @see #getMeteringAreas() 3930 */ 3931 public void setMeteringAreas(List<Area> meteringAreas) { 3932 set(KEY_METERING_AREAS, meteringAreas); 3933 } 3934 3935 /** 3936 * Gets the maximum number of detected faces supported. This is the 3937 * maximum length of the list returned from {@link FaceDetectionListener}. 3938 * If the return value is 0, face detection of the specified type is not 3939 * supported. 3940 * 3941 * @return the maximum number of detected face supported by the camera. 3942 * @see #startFaceDetection() 3943 */ 3944 public int getMaxNumDetectedFaces() { 3945 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3946 } 3947 3948 /** 3949 * Sets recording mode hint. This tells the camera that the intent of 3950 * the application is to record videos {@link 3951 * android.media.MediaRecorder#start()}, not to take still pictures 3952 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3953 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3954 * allow MediaRecorder.start() to start faster or with fewer glitches on 3955 * output. This should be called before starting preview for the best 3956 * result, but can be changed while the preview is active. The default 3957 * value is false. 3958 * 3959 * The app can still call takePicture() when the hint is true or call 3960 * MediaRecorder.start() when the hint is false. But the performance may 3961 * be worse. 3962 * 3963 * @param hint true if the apps intend to record videos using 3964 * {@link android.media.MediaRecorder}. 3965 */ 3966 public void setRecordingHint(boolean hint) { 3967 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3968 } 3969 3970 /** 3971 * <p>Returns true if video snapshot is supported. That is, applications 3972 * can call {@link #takePicture(Camera.ShutterCallback, 3973 * Camera.PictureCallback, Camera.PictureCallback, 3974 * Camera.PictureCallback)} during recording. Applications do not need 3975 * to call {@link #startPreview()} after taking a picture. The preview 3976 * will be still active. Other than that, taking a picture during 3977 * recording is identical to taking a picture normally. All settings and 3978 * methods related to takePicture work identically. Ex: 3979 * {@link #getPictureSize()}, {@link #getSupportedPictureSizes()}, 3980 * {@link #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 3981 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and 3982 * {@link #FLASH_MODE_ON} also still work, but the video will record the 3983 * flash.</p> 3984 * 3985 * <p>Applications can set shutter callback as null to avoid the shutter 3986 * sound. It is also recommended to set raw picture and post view 3987 * callbacks to null to avoid the interrupt of preview display.</p> 3988 * 3989 * <p>Field-of-view of the recorded video may be different from that of the 3990 * captured pictures. The maximum size of a video snapshot may be 3991 * smaller than that for regular still captures. If the current picture 3992 * size is set higher than can be supported by video snapshot, the 3993 * picture will be captured at the maximum supported size instead.</p> 3994 * 3995 * @return true if video snapshot is supported. 3996 */ 3997 public boolean isVideoSnapshotSupported() { 3998 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 3999 return TRUE.equals(str); 4000 } 4001 4002 /** 4003 * <p>Enables and disables video stabilization. Use 4004 * {@link #isVideoStabilizationSupported} to determine if calling this 4005 * method is valid.</p> 4006 * 4007 * <p>Video stabilization reduces the shaking due to the motion of the 4008 * camera in both the preview stream and in recorded videos, including 4009 * data received from the preview callback. It does not reduce motion 4010 * blur in images captured with 4011 * {@link Camera#takePicture takePicture}.</p> 4012 * 4013 * <p>Video stabilization can be enabled and disabled while preview or 4014 * recording is active, but toggling it may cause a jump in the video 4015 * stream that may be undesirable in a recorded video.</p> 4016 * 4017 * @param toggle Set to true to enable video stabilization, and false to 4018 * disable video stabilization. 4019 * @see #isVideoStabilizationSupported() 4020 * @see #getVideoStabilization() 4021 */ 4022 public void setVideoStabilization(boolean toggle) { 4023 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 4024 } 4025 4026 /** 4027 * Get the current state of video stabilization. See 4028 * {@link #setVideoStabilization} for details of video stabilization. 4029 * 4030 * @return true if video stabilization is enabled 4031 * @see #isVideoStabilizationSupported() 4032 * @see #setVideoStabilization(boolean) 4033 */ 4034 public boolean getVideoStabilization() { 4035 String str = get(KEY_VIDEO_STABILIZATION); 4036 return TRUE.equals(str); 4037 } 4038 4039 /** 4040 * Returns true if video stabilization is supported. See 4041 * {@link #setVideoStabilization} for details of video stabilization. 4042 * 4043 * @return true if video stabilization is supported 4044 * @see #setVideoStabilization(boolean) 4045 * @see #getVideoStabilization() 4046 */ 4047 public boolean isVideoStabilizationSupported() { 4048 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 4049 return TRUE.equals(str); 4050 } 4051 4052 // Splits a comma delimited string to an ArrayList of String. 4053 // Return null if the passing string is null or the size is 0. 4054 private ArrayList<String> split(String str) { 4055 if (str == null) return null; 4056 4057 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4058 splitter.setString(str); 4059 ArrayList<String> substrings = new ArrayList<String>(); 4060 for (String s : splitter) { 4061 substrings.add(s); 4062 } 4063 return substrings; 4064 } 4065 4066 // Splits a comma delimited string to an ArrayList of Integer. 4067 // Return null if the passing string is null or the size is 0. 4068 private ArrayList<Integer> splitInt(String str) { 4069 if (str == null) return null; 4070 4071 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4072 splitter.setString(str); 4073 ArrayList<Integer> substrings = new ArrayList<Integer>(); 4074 for (String s : splitter) { 4075 substrings.add(Integer.parseInt(s)); 4076 } 4077 if (substrings.size() == 0) return null; 4078 return substrings; 4079 } 4080 4081 private void splitInt(String str, int[] output) { 4082 if (str == null) return; 4083 4084 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4085 splitter.setString(str); 4086 int index = 0; 4087 for (String s : splitter) { 4088 output[index++] = Integer.parseInt(s); 4089 } 4090 } 4091 4092 // Splits a comma delimited string to an ArrayList of Float. 4093 private void splitFloat(String str, float[] output) { 4094 if (str == null) return; 4095 4096 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4097 splitter.setString(str); 4098 int index = 0; 4099 for (String s : splitter) { 4100 output[index++] = Float.parseFloat(s); 4101 } 4102 } 4103 4104 // Returns the value of a float parameter. 4105 private float getFloat(String key, float defaultValue) { 4106 try { 4107 return Float.parseFloat(mMap.get(key)); 4108 } catch (NumberFormatException ex) { 4109 return defaultValue; 4110 } 4111 } 4112 4113 // Returns the value of a integer parameter. 4114 private int getInt(String key, int defaultValue) { 4115 try { 4116 return Integer.parseInt(mMap.get(key)); 4117 } catch (NumberFormatException ex) { 4118 return defaultValue; 4119 } 4120 } 4121 4122 // Splits a comma delimited string to an ArrayList of Size. 4123 // Return null if the passing string is null or the size is 0. 4124 private ArrayList<Size> splitSize(String str) { 4125 if (str == null) return null; 4126 4127 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4128 splitter.setString(str); 4129 ArrayList<Size> sizeList = new ArrayList<Size>(); 4130 for (String s : splitter) { 4131 Size size = strToSize(s); 4132 if (size != null) sizeList.add(size); 4133 } 4134 if (sizeList.size() == 0) return null; 4135 return sizeList; 4136 } 4137 4138 // Parses a string (ex: "480x320") to Size object. 4139 // Return null if the passing string is null. 4140 private Size strToSize(String str) { 4141 if (str == null) return null; 4142 4143 int pos = str.indexOf('x'); 4144 if (pos != -1) { 4145 String width = str.substring(0, pos); 4146 String height = str.substring(pos + 1); 4147 return new Size(Integer.parseInt(width), 4148 Integer.parseInt(height)); 4149 } 4150 Log.e(TAG, "Invalid size parameter string=" + str); 4151 return null; 4152 } 4153 4154 // Splits a comma delimited string to an ArrayList of int array. 4155 // Example string: "(10000,26623),(10000,30000)". Return null if the 4156 // passing string is null or the size is 0. 4157 private ArrayList<int[]> splitRange(String str) { 4158 if (str == null || str.charAt(0) != '(' 4159 || str.charAt(str.length() - 1) != ')') { 4160 Log.e(TAG, "Invalid range list string=" + str); 4161 return null; 4162 } 4163 4164 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 4165 int endIndex, fromIndex = 1; 4166 do { 4167 int[] range = new int[2]; 4168 endIndex = str.indexOf("),(", fromIndex); 4169 if (endIndex == -1) endIndex = str.length() - 1; 4170 splitInt(str.substring(fromIndex, endIndex), range); 4171 rangeList.add(range); 4172 fromIndex = endIndex + 3; 4173 } while (endIndex != str.length() - 1); 4174 4175 if (rangeList.size() == 0) return null; 4176 return rangeList; 4177 } 4178 4179 // Splits a comma delimited string to an ArrayList of Area objects. 4180 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 4181 // the passing string is null or the size is 0 or (0,0,0,0,0). 4182 private ArrayList<Area> splitArea(String str) { 4183 if (str == null || str.charAt(0) != '(' 4184 || str.charAt(str.length() - 1) != ')') { 4185 Log.e(TAG, "Invalid area string=" + str); 4186 return null; 4187 } 4188 4189 ArrayList<Area> result = new ArrayList<Area>(); 4190 int endIndex, fromIndex = 1; 4191 int[] array = new int[5]; 4192 do { 4193 endIndex = str.indexOf("),(", fromIndex); 4194 if (endIndex == -1) endIndex = str.length() - 1; 4195 splitInt(str.substring(fromIndex, endIndex), array); 4196 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 4197 result.add(new Area(rect, array[4])); 4198 fromIndex = endIndex + 3; 4199 } while (endIndex != str.length() - 1); 4200 4201 if (result.size() == 0) return null; 4202 4203 if (result.size() == 1) { 4204 Area area = result.get(0); 4205 Rect rect = area.rect; 4206 if (rect.left == 0 && rect.top == 0 && rect.right == 0 4207 && rect.bottom == 0 && area.weight == 0) { 4208 return null; 4209 } 4210 } 4211 4212 return result; 4213 } 4214 4215 private boolean same(String s1, String s2) { 4216 if (s1 == null && s2 == null) return true; 4217 if (s1 != null && s1.equals(s2)) return true; 4218 return false; 4219 } 4220 }; 4221} 4222