Camera.java revision 248ba23ad28c1f8fb69904663204df08c5818700
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.hardware; 18 19import android.annotation.SdkConstant; 20import android.annotation.SdkConstant.SdkConstantType; 21import android.graphics.ImageFormat; 22import android.graphics.Point; 23import android.graphics.Rect; 24import android.graphics.SurfaceTexture; 25import android.os.Handler; 26import android.os.Looper; 27import android.os.Message; 28import android.util.Log; 29import android.view.Surface; 30import android.view.SurfaceHolder; 31 32import java.io.IOException; 33import java.lang.ref.WeakReference; 34import java.util.ArrayList; 35import java.util.HashMap; 36import java.util.List; 37import java.util.StringTokenizer; 38import java.util.concurrent.locks.ReentrantLock; 39 40/** 41 * The Camera class is used to set image capture settings, start/stop preview, 42 * snap pictures, and retrieve frames for encoding for video. This class is a 43 * client for the Camera service, which manages the actual camera hardware. 44 * 45 * <p>To access the device camera, you must declare the 46 * {@link android.Manifest.permission#CAMERA} permission in your Android 47 * Manifest. Also be sure to include the 48 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 49 * manifest element to declare camera features used by your application. 50 * For example, if you use the camera and auto-focus feature, your Manifest 51 * should include the following:</p> 52 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 53 * <uses-feature android:name="android.hardware.camera" /> 54 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 55 * 56 * <p>To take pictures with this class, use the following steps:</p> 57 * 58 * <ol> 59 * <li>Obtain an instance of Camera from {@link #open(int)}. 60 * 61 * <li>Get existing (default) settings with {@link #getParameters()}. 62 * 63 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 64 * {@link #setParameters(Camera.Parameters)}. 65 * 66 * <li>If desired, call {@link #setDisplayOrientation(int)}. 67 * 68 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 69 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 70 * will be unable to start the preview. 71 * 72 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 73 * preview surface. Preview must be started before you can take a picture. 74 * 75 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 76 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 77 * capture a photo. Wait for the callbacks to provide the actual image data. 78 * 79 * <li>After taking a picture, preview display will have stopped. To take more 80 * photos, call {@link #startPreview()} again first. 81 * 82 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 83 * 84 * <li><b>Important:</b> Call {@link #release()} to release the camera for 85 * use by other applications. Applications should release the camera 86 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 87 * it in {@link android.app.Activity#onResume()}). 88 * </ol> 89 * 90 * <p>To quickly switch to video recording mode, use these steps:</p> 91 * 92 * <ol> 93 * <li>Obtain and initialize a Camera and start preview as described above. 94 * 95 * <li>Call {@link #unlock()} to allow the media process to access the camera. 96 * 97 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 98 * See {@link android.media.MediaRecorder} information about video recording. 99 * 100 * <li>When finished recording, call {@link #reconnect()} to re-acquire 101 * and re-lock the camera. 102 * 103 * <li>If desired, restart preview and take more photos or videos. 104 * 105 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 106 * </ol> 107 * 108 * <p>This class is not thread-safe, and is meant for use from one event thread. 109 * Most long-running operations (preview, focus, photo capture, etc) happen 110 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 111 * on the event thread {@link #open(int)} was called from. This class's methods 112 * must never be called from multiple threads at once.</p> 113 * 114 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 115 * may have different hardware specifications, such as megapixel ratings and 116 * auto-focus capabilities. In order for your application to be compatible with 117 * more devices, you should not make assumptions about the device camera 118 * specifications.</p> 119 * 120 * <div class="special reference"> 121 * <h3>Developer Guides</h3> 122 * <p>For more information about using cameras, read the 123 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 124 * </div> 125 */ 126public class Camera { 127 private static final String TAG = "Camera"; 128 129 // These match the enums in frameworks/base/include/camera/Camera.h 130 private static final int CAMERA_MSG_ERROR = 0x001; 131 private static final int CAMERA_MSG_SHUTTER = 0x002; 132 private static final int CAMERA_MSG_FOCUS = 0x004; 133 private static final int CAMERA_MSG_ZOOM = 0x008; 134 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 135 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 136 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 137 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 138 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 139 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 140 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 141 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 142 143 private int mNativeContext; // accessed by native methods 144 private EventHandler mEventHandler; 145 private ShutterCallback mShutterCallback; 146 private PictureCallback mRawImageCallback; 147 private PictureCallback mJpegCallback; 148 private PreviewCallback mPreviewCallback; 149 private PictureCallback mPostviewCallback; 150 private AutoFocusCallback mAutoFocusCallback; 151 private AutoFocusMoveCallback mAutoFocusMoveCallback; 152 private OnZoomChangeListener mZoomListener; 153 private FaceDetectionListener mFaceListener; 154 private ErrorCallback mErrorCallback; 155 private boolean mOneShot; 156 private boolean mWithBuffer; 157 private boolean mFaceDetectionRunning = false; 158 private ReentrantLock mFocusLock = new ReentrantLock(); 159 160 /** 161 * Broadcast Action: A new picture is taken by the camera, and the entry of 162 * the picture has been added to the media store. 163 * {@link android.content.Intent#getData} is URI of the picture. 164 */ 165 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 166 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 167 168 /** 169 * Broadcast Action: A new video is recorded by the camera, and the entry 170 * of the video has been added to the media store. 171 * {@link android.content.Intent#getData} is URI of the video. 172 */ 173 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 174 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 175 176 /** 177 * Hardware face detection. It does not use much CPU. 178 */ 179 private static final int CAMERA_FACE_DETECTION_HW = 0; 180 181 /** 182 * Software face detection. It uses some CPU. 183 */ 184 private static final int CAMERA_FACE_DETECTION_SW = 1; 185 186 /** 187 * Returns the number of physical cameras available on this device. 188 */ 189 public native static int getNumberOfCameras(); 190 191 /** 192 * Returns the information about a particular camera. 193 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 194 */ 195 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 196 197 /** 198 * Information about a camera 199 */ 200 public static class CameraInfo { 201 /** 202 * The facing of the camera is opposite to that of the screen. 203 */ 204 public static final int CAMERA_FACING_BACK = 0; 205 206 /** 207 * The facing of the camera is the same as that of the screen. 208 */ 209 public static final int CAMERA_FACING_FRONT = 1; 210 211 /** 212 * The direction that the camera faces. It should be 213 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 214 */ 215 public int facing; 216 217 /** 218 * <p>The orientation of the camera image. The value is the angle that the 219 * camera image needs to be rotated clockwise so it shows correctly on 220 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 221 * 222 * <p>For example, suppose a device has a naturally tall screen. The 223 * back-facing camera sensor is mounted in landscape. You are looking at 224 * the screen. If the top side of the camera sensor is aligned with the 225 * right edge of the screen in natural orientation, the value should be 226 * 90. If the top side of a front-facing camera sensor is aligned with 227 * the right of the screen, the value should be 270.</p> 228 * 229 * @see #setDisplayOrientation(int) 230 * @see Parameters#setRotation(int) 231 * @see Parameters#setPreviewSize(int, int) 232 * @see Parameters#setPictureSize(int, int) 233 * @see Parameters#setJpegThumbnailSize(int, int) 234 */ 235 public int orientation; 236 }; 237 238 /** 239 * Creates a new Camera object to access a particular hardware camera. If 240 * the same camera is opened by other applications, this will throw a 241 * RuntimeException. 242 * 243 * <p>You must call {@link #release()} when you are done using the camera, 244 * otherwise it will remain locked and be unavailable to other applications. 245 * 246 * <p>Your application should only have one Camera object active at a time 247 * for a particular hardware camera. 248 * 249 * <p>Callbacks from other methods are delivered to the event loop of the 250 * thread which called open(). If this thread has no event loop, then 251 * callbacks are delivered to the main application event loop. If there 252 * is no main application event loop, callbacks are not delivered. 253 * 254 * <p class="caution"><b>Caution:</b> On some devices, this method may 255 * take a long time to complete. It is best to call this method from a 256 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 257 * blocking the main application UI thread. 258 * 259 * @param cameraId the hardware camera to access, between 0 and 260 * {@link #getNumberOfCameras()}-1. 261 * @return a new Camera object, connected, locked and ready for use. 262 * @throws RuntimeException if opening the camera fails (for example, if the 263 * camera is in use by another process or device policy manager has 264 * disabled the camera). 265 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 266 */ 267 public static Camera open(int cameraId) { 268 return new Camera(cameraId); 269 } 270 271 /** 272 * Creates a new Camera object to access the first back-facing camera on the 273 * device. If the device does not have a back-facing camera, this returns 274 * null. 275 * @see #open(int) 276 */ 277 public static Camera open() { 278 int numberOfCameras = getNumberOfCameras(); 279 CameraInfo cameraInfo = new CameraInfo(); 280 for (int i = 0; i < numberOfCameras; i++) { 281 getCameraInfo(i, cameraInfo); 282 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 283 return new Camera(i); 284 } 285 } 286 return null; 287 } 288 289 Camera(int cameraId) { 290 mShutterCallback = null; 291 mRawImageCallback = null; 292 mJpegCallback = null; 293 mPreviewCallback = null; 294 mPostviewCallback = null; 295 mZoomListener = null; 296 297 Looper looper; 298 if ((looper = Looper.myLooper()) != null) { 299 mEventHandler = new EventHandler(this, looper); 300 } else if ((looper = Looper.getMainLooper()) != null) { 301 mEventHandler = new EventHandler(this, looper); 302 } else { 303 mEventHandler = null; 304 } 305 306 native_setup(new WeakReference<Camera>(this), cameraId); 307 } 308 309 /** 310 * An empty Camera for testing purpose. 311 */ 312 Camera() { 313 } 314 315 protected void finalize() { 316 release(); 317 } 318 319 private native final void native_setup(Object camera_this, int cameraId); 320 private native final void native_release(); 321 322 323 /** 324 * Disconnects and releases the Camera object resources. 325 * 326 * <p>You must call this as soon as you're done with the Camera object.</p> 327 */ 328 public final void release() { 329 native_release(); 330 mFaceDetectionRunning = false; 331 } 332 333 /** 334 * Unlocks the camera to allow another process to access it. 335 * Normally, the camera is locked to the process with an active Camera 336 * object until {@link #release()} is called. To allow rapid handoff 337 * between processes, you can call this method to release the camera 338 * temporarily for another process to use; once the other process is done 339 * you can call {@link #reconnect()} to reclaim the camera. 340 * 341 * <p>This must be done before calling 342 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 343 * called after recording starts. 344 * 345 * <p>If you are not recording video, you probably do not need this method. 346 * 347 * @throws RuntimeException if the camera cannot be unlocked. 348 */ 349 public native final void unlock(); 350 351 /** 352 * Re-locks the camera to prevent other processes from accessing it. 353 * Camera objects are locked by default unless {@link #unlock()} is 354 * called. Normally {@link #reconnect()} is used instead. 355 * 356 * <p>Since API level 14, camera is automatically locked for applications in 357 * {@link android.media.MediaRecorder#start()}. Applications can use the 358 * camera (ex: zoom) after recording starts. There is no need to call this 359 * after recording starts or stops. 360 * 361 * <p>If you are not recording video, you probably do not need this method. 362 * 363 * @throws RuntimeException if the camera cannot be re-locked (for 364 * example, if the camera is still in use by another process). 365 */ 366 public native final void lock(); 367 368 /** 369 * Reconnects to the camera service after another process used it. 370 * After {@link #unlock()} is called, another process may use the 371 * camera; when the process is done, you must reconnect to the camera, 372 * which will re-acquire the lock and allow you to continue using the 373 * camera. 374 * 375 * <p>Since API level 14, camera is automatically locked for applications in 376 * {@link android.media.MediaRecorder#start()}. Applications can use the 377 * camera (ex: zoom) after recording starts. There is no need to call this 378 * after recording starts or stops. 379 * 380 * <p>If you are not recording video, you probably do not need this method. 381 * 382 * @throws IOException if a connection cannot be re-established (for 383 * example, if the camera is still in use by another process). 384 */ 385 public native final void reconnect() throws IOException; 386 387 /** 388 * Sets the {@link Surface} to be used for live preview. 389 * Either a surface or surface texture is necessary for preview, and 390 * preview is necessary to take pictures. The same surface can be re-set 391 * without harm. Setting a preview surface will un-set any preview surface 392 * texture that was set via {@link #setPreviewTexture}. 393 * 394 * <p>The {@link SurfaceHolder} must already contain a surface when this 395 * method is called. If you are using {@link android.view.SurfaceView}, 396 * you will need to register a {@link SurfaceHolder.Callback} with 397 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 398 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 399 * calling setPreviewDisplay() or starting preview. 400 * 401 * <p>This method must be called before {@link #startPreview()}. The 402 * one exception is that if the preview surface is not set (or set to null) 403 * before startPreview() is called, then this method may be called once 404 * with a non-null parameter to set the preview surface. (This allows 405 * camera setup and surface creation to happen in parallel, saving time.) 406 * The preview surface may not otherwise change while preview is running. 407 * 408 * @param holder containing the Surface on which to place the preview, 409 * or null to remove the preview surface 410 * @throws IOException if the method fails (for example, if the surface 411 * is unavailable or unsuitable). 412 */ 413 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 414 if (holder != null) { 415 setPreviewDisplay(holder.getSurface()); 416 } else { 417 setPreviewDisplay((Surface)null); 418 } 419 } 420 421 private native final void setPreviewDisplay(Surface surface) throws IOException; 422 423 /** 424 * Sets the {@link SurfaceTexture} to be used for live preview. 425 * Either a surface or surface texture is necessary for preview, and 426 * preview is necessary to take pictures. The same surface texture can be 427 * re-set without harm. Setting a preview surface texture will un-set any 428 * preview surface that was set via {@link #setPreviewDisplay}. 429 * 430 * <p>This method must be called before {@link #startPreview()}. The 431 * one exception is that if the preview surface texture is not set (or set 432 * to null) before startPreview() is called, then this method may be called 433 * once with a non-null parameter to set the preview surface. (This allows 434 * camera setup and surface creation to happen in parallel, saving time.) 435 * The preview surface texture may not otherwise change while preview is 436 * running. 437 * 438 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 439 * SurfaceTexture set as the preview texture have an unspecified zero point, 440 * and cannot be directly compared between different cameras or different 441 * instances of the same camera, or across multiple runs of the same 442 * program. 443 * 444 * <p>If you are using the preview data to create video or still images, 445 * strongly consider using {@link android.media.MediaActionSound} to 446 * properly indicate image capture or recording start/stop to the user.</p> 447 * 448 * @see android.media.MediaActionSound 449 * @see android.graphics.SurfaceTexture 450 * @see android.view.TextureView 451 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 452 * images are to be sent or null to remove the current preview surface 453 * texture 454 * @throws IOException if the method fails (for example, if the surface 455 * texture is unavailable or unsuitable). 456 */ 457 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 458 459 /** 460 * Callback interface used to deliver copies of preview frames as 461 * they are displayed. 462 * 463 * @see #setPreviewCallback(Camera.PreviewCallback) 464 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 465 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 466 * @see #startPreview() 467 */ 468 public interface PreviewCallback 469 { 470 /** 471 * Called as preview frames are displayed. This callback is invoked 472 * on the event thread {@link #open(int)} was called from. 473 * 474 * @param data the contents of the preview frame in the format defined 475 * by {@link android.graphics.ImageFormat}, which can be queried 476 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 477 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 478 * is never called, the default will be the YCbCr_420_SP 479 * (NV21) format. 480 * @param camera the Camera service object. 481 */ 482 void onPreviewFrame(byte[] data, Camera camera); 483 }; 484 485 /** 486 * Starts capturing and drawing preview frames to the screen. 487 * Preview will not actually start until a surface is supplied 488 * with {@link #setPreviewDisplay(SurfaceHolder)} or 489 * {@link #setPreviewTexture(SurfaceTexture)}. 490 * 491 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 492 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 493 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 494 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 495 * will be called when preview data becomes available. 496 */ 497 public native final void startPreview(); 498 499 /** 500 * Stops capturing and drawing preview frames to the surface, and 501 * resets the camera for a future call to {@link #startPreview()}. 502 */ 503 public final void stopPreview() { 504 _stopPreview(); 505 mFaceDetectionRunning = false; 506 507 mShutterCallback = null; 508 mRawImageCallback = null; 509 mPostviewCallback = null; 510 mJpegCallback = null; 511 mAutoFocusCallback = null; 512 mAutoFocusMoveCallback = null; 513 } 514 515 private native final void _stopPreview(); 516 517 /** 518 * Return current preview state. 519 * 520 * FIXME: Unhide before release 521 * @hide 522 */ 523 public native final boolean previewEnabled(); 524 525 /** 526 * <p>Installs a callback to be invoked for every preview frame in addition 527 * to displaying them on the screen. The callback will be repeatedly called 528 * for as long as preview is active. This method can be called at any time, 529 * even while preview is live. Any other preview callbacks are 530 * overridden.</p> 531 * 532 * <p>If you are using the preview data to create video or still images, 533 * strongly consider using {@link android.media.MediaActionSound} to 534 * properly indicate image capture or recording start/stop to the user.</p> 535 * 536 * @param cb a callback object that receives a copy of each preview frame, 537 * or null to stop receiving callbacks. 538 * @see android.media.MediaActionSound 539 */ 540 public final void setPreviewCallback(PreviewCallback cb) { 541 mPreviewCallback = cb; 542 mOneShot = false; 543 mWithBuffer = false; 544 // Always use one-shot mode. We fake camera preview mode by 545 // doing one-shot preview continuously. 546 setHasPreviewCallback(cb != null, false); 547 } 548 549 /** 550 * <p>Installs a callback to be invoked for the next preview frame in 551 * addition to displaying it on the screen. After one invocation, the 552 * callback is cleared. This method can be called any time, even when 553 * preview is live. Any other preview callbacks are overridden.</p> 554 * 555 * <p>If you are using the preview data to create video or still images, 556 * strongly consider using {@link android.media.MediaActionSound} to 557 * properly indicate image capture or recording start/stop to the user.</p> 558 * 559 * @param cb a callback object that receives a copy of the next preview frame, 560 * or null to stop receiving callbacks. 561 * @see android.media.MediaActionSound 562 */ 563 public final void setOneShotPreviewCallback(PreviewCallback cb) { 564 mPreviewCallback = cb; 565 mOneShot = true; 566 mWithBuffer = false; 567 setHasPreviewCallback(cb != null, false); 568 } 569 570 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 571 572 /** 573 * <p>Installs a callback to be invoked for every preview frame, using 574 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 575 * displaying them on the screen. The callback will be repeatedly called 576 * for as long as preview is active and buffers are available. Any other 577 * preview callbacks are overridden.</p> 578 * 579 * <p>The purpose of this method is to improve preview efficiency and frame 580 * rate by allowing preview frame memory reuse. You must call 581 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 582 * calling this method -- or no callbacks will received.</p> 583 * 584 * <p>The buffer queue will be cleared if this method is called with a null 585 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 586 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 587 * called.</p> 588 * 589 * <p>If you are using the preview data to create video or still images, 590 * strongly consider using {@link android.media.MediaActionSound} to 591 * properly indicate image capture or recording start/stop to the user.</p> 592 * 593 * @param cb a callback object that receives a copy of the preview frame, 594 * or null to stop receiving callbacks and clear the buffer queue. 595 * @see #addCallbackBuffer(byte[]) 596 * @see android.media.MediaActionSound 597 */ 598 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 599 mPreviewCallback = cb; 600 mOneShot = false; 601 mWithBuffer = true; 602 setHasPreviewCallback(cb != null, true); 603 } 604 605 /** 606 * Adds a pre-allocated buffer to the preview callback buffer queue. 607 * Applications can add one or more buffers to the queue. When a preview 608 * frame arrives and there is still at least one available buffer, the 609 * buffer will be used and removed from the queue. Then preview callback is 610 * invoked with the buffer. If a frame arrives and there is no buffer left, 611 * the frame is discarded. Applications should add buffers back when they 612 * finish processing the data in them. 613 * 614 * <p>The size of the buffer is determined by multiplying the preview 615 * image width, height, and bytes per pixel. The width and height can be 616 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 617 * can be computed from 618 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 619 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 620 * 621 * <p>This method is only necessary when 622 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 623 * {@link #setPreviewCallback(PreviewCallback)} or 624 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 625 * are automatically allocated. When a supplied buffer is too small to 626 * hold the preview frame data, preview callback will return null and 627 * the buffer will be removed from the buffer queue. 628 * 629 * @param callbackBuffer the buffer to add to the queue. 630 * The size should be width * height * bits_per_pixel / 8. 631 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 632 */ 633 public final void addCallbackBuffer(byte[] callbackBuffer) 634 { 635 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 636 } 637 638 /** 639 * Adds a pre-allocated buffer to the raw image callback buffer queue. 640 * Applications can add one or more buffers to the queue. When a raw image 641 * frame arrives and there is still at least one available buffer, the 642 * buffer will be used to hold the raw image data and removed from the 643 * queue. Then raw image callback is invoked with the buffer. If a raw 644 * image frame arrives but there is no buffer left, the frame is 645 * discarded. Applications should add buffers back when they finish 646 * processing the data in them by calling this method again in order 647 * to avoid running out of raw image callback buffers. 648 * 649 * <p>The size of the buffer is determined by multiplying the raw image 650 * width, height, and bytes per pixel. The width and height can be 651 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 652 * can be computed from 653 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 654 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 655 * 656 * <p>This method is only necessary when the PictureCallbck for raw image 657 * is used while calling {@link #takePicture(Camera.ShutterCallback, 658 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 659 * 660 * <p>Please note that by calling this method, the mode for 661 * application-managed callback buffers is triggered. If this method has 662 * never been called, null will be returned by the raw image callback since 663 * there is no image callback buffer available. Furthermore, When a supplied 664 * buffer is too small to hold the raw image data, raw image callback will 665 * return null and the buffer will be removed from the buffer queue. 666 * 667 * @param callbackBuffer the buffer to add to the raw image callback buffer 668 * queue. The size should be width * height * (bits per pixel) / 8. An 669 * null callbackBuffer will be ignored and won't be added to the queue. 670 * 671 * @see #takePicture(Camera.ShutterCallback, 672 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 673 * 674 * {@hide} 675 */ 676 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 677 { 678 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 679 } 680 681 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 682 { 683 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 684 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 685 msgType != CAMERA_MSG_RAW_IMAGE) { 686 throw new IllegalArgumentException( 687 "Unsupported message type: " + msgType); 688 } 689 690 _addCallbackBuffer(callbackBuffer, msgType); 691 } 692 693 private native final void _addCallbackBuffer( 694 byte[] callbackBuffer, int msgType); 695 696 private class EventHandler extends Handler 697 { 698 private Camera mCamera; 699 700 public EventHandler(Camera c, Looper looper) { 701 super(looper); 702 mCamera = c; 703 } 704 705 @Override 706 public void handleMessage(Message msg) { 707 switch(msg.what) { 708 case CAMERA_MSG_SHUTTER: 709 if (mShutterCallback != null) { 710 mShutterCallback.onShutter(); 711 } 712 return; 713 714 case CAMERA_MSG_RAW_IMAGE: 715 if (mRawImageCallback != null) { 716 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 717 } 718 return; 719 720 case CAMERA_MSG_COMPRESSED_IMAGE: 721 if (mJpegCallback != null) { 722 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 723 } 724 return; 725 726 case CAMERA_MSG_PREVIEW_FRAME: 727 if (mPreviewCallback != null) { 728 PreviewCallback cb = mPreviewCallback; 729 if (mOneShot) { 730 // Clear the callback variable before the callback 731 // in case the app calls setPreviewCallback from 732 // the callback function 733 mPreviewCallback = null; 734 } else if (!mWithBuffer) { 735 // We're faking the camera preview mode to prevent 736 // the app from being flooded with preview frames. 737 // Set to oneshot mode again. 738 setHasPreviewCallback(true, false); 739 } 740 cb.onPreviewFrame((byte[])msg.obj, mCamera); 741 } 742 return; 743 744 case CAMERA_MSG_POSTVIEW_FRAME: 745 if (mPostviewCallback != null) { 746 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 747 } 748 return; 749 750 case CAMERA_MSG_FOCUS: 751 mFocusLock.lock(); 752 try { 753 if (mAutoFocusCallback != null) { 754 boolean success = msg.arg1 == 0 ? false : true; 755 mAutoFocusCallback.onAutoFocus(success, mCamera); 756 } 757 } finally { 758 mFocusLock.unlock(); 759 } 760 return; 761 762 case CAMERA_MSG_ZOOM: 763 if (mZoomListener != null) { 764 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 765 } 766 return; 767 768 case CAMERA_MSG_PREVIEW_METADATA: 769 if (mFaceListener != null) { 770 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 771 } 772 return; 773 774 case CAMERA_MSG_ERROR : 775 Log.e(TAG, "Error " + msg.arg1); 776 if (mErrorCallback != null) { 777 mErrorCallback.onError(msg.arg1, mCamera); 778 } 779 return; 780 781 case CAMERA_MSG_FOCUS_MOVE: 782 if (mAutoFocusMoveCallback != null) { 783 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 784 } 785 return; 786 787 default: 788 Log.e(TAG, "Unknown message type " + msg.what); 789 return; 790 } 791 } 792 } 793 794 private static void postEventFromNative(Object camera_ref, 795 int what, int arg1, int arg2, Object obj) 796 { 797 Camera c = (Camera)((WeakReference)camera_ref).get(); 798 if (c == null) 799 return; 800 801 if (c.mEventHandler != null) { 802 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 803 c.mEventHandler.sendMessage(m); 804 } 805 } 806 807 /** 808 * Callback interface used to notify on completion of camera auto focus. 809 * 810 * <p>Devices that do not support auto-focus will receive a "fake" 811 * callback to this interface. If your application needs auto-focus and 812 * should not be installed on devices <em>without</em> auto-focus, you must 813 * declare that your app uses the 814 * {@code android.hardware.camera.autofocus} feature, in the 815 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 816 * manifest element.</p> 817 * 818 * @see #autoFocus(AutoFocusCallback) 819 */ 820 public interface AutoFocusCallback 821 { 822 /** 823 * Called when the camera auto focus completes. If the camera 824 * does not support auto-focus and autoFocus is called, 825 * onAutoFocus will be called immediately with a fake value of 826 * <code>success</code> set to <code>true</code>. 827 * 828 * The auto-focus routine does not lock auto-exposure and auto-white 829 * balance after it completes. 830 * 831 * @param success true if focus was successful, false if otherwise 832 * @param camera the Camera service object 833 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 834 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 835 */ 836 void onAutoFocus(boolean success, Camera camera); 837 } 838 839 /** 840 * Starts camera auto-focus and registers a callback function to run when 841 * the camera is focused. This method is only valid when preview is active 842 * (between {@link #startPreview()} and before {@link #stopPreview()}). 843 * 844 * <p>Callers should check 845 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 846 * this method should be called. If the camera does not support auto-focus, 847 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 848 * callback will be called immediately. 849 * 850 * <p>If your application should not be installed 851 * on devices without auto-focus, you must declare that your application 852 * uses auto-focus with the 853 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 854 * manifest element.</p> 855 * 856 * <p>If the current flash mode is not 857 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 858 * fired during auto-focus, depending on the driver and camera hardware.<p> 859 * 860 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 861 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 862 * do not change during and after autofocus. But auto-focus routine may stop 863 * auto-exposure and auto-white balance transiently during focusing. 864 * 865 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 866 * image capture with {@link #takePicture(Camera.ShutterCallback, 867 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 868 * the focus position. Applications must call cancelAutoFocus to reset the 869 * focus.</p> 870 * 871 * <p>If autofocus is successful, consider using 872 * {@link android.media.MediaActionSound} to properly play back an autofocus 873 * success sound to the user.</p> 874 * 875 * @param cb the callback to run 876 * @see #cancelAutoFocus() 877 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 878 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 879 * @see android.media.MediaActionSound 880 */ 881 public final void autoFocus(AutoFocusCallback cb) 882 { 883 mFocusLock.lock(); 884 try { 885 mAutoFocusCallback = cb; 886 native_autoFocus(); 887 } finally { 888 mFocusLock.unlock(); 889 } 890 } 891 private native final void native_autoFocus(); 892 893 /** 894 * Cancels any auto-focus function in progress. 895 * Whether or not auto-focus is currently in progress, 896 * this function will return the focus position to the default. 897 * If the camera does not support auto-focus, this is a no-op. 898 * 899 * @see #autoFocus(Camera.AutoFocusCallback) 900 */ 901 public final void cancelAutoFocus() 902 { 903 mFocusLock.lock(); 904 try { 905 mAutoFocusCallback = null; 906 native_cancelAutoFocus(); 907 removePendingAFCompletionMessages(); 908 } finally { 909 mFocusLock.unlock(); 910 } 911 } 912 private native final void native_cancelAutoFocus(); 913 914 /** 915 * Callback interface used to notify on auto focus start and stop. 916 * 917 * <p>This is only supported in continuous autofocus modes -- {@link 918 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 919 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 920 * autofocus animation based on this.</p> 921 */ 922 public interface AutoFocusMoveCallback 923 { 924 /** 925 * Called when the camera auto focus starts or stops. 926 * 927 * @param start true if focus starts to move, false if focus stops to move 928 * @param camera the Camera service object 929 */ 930 void onAutoFocusMoving(boolean start, Camera camera); 931 } 932 933 /** 934 * Sets camera auto-focus move callback. 935 * 936 * @param cb the callback to run 937 */ 938 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 939 mAutoFocusMoveCallback = cb; 940 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 941 } 942 943 private native void enableFocusMoveCallback(int enable); 944 945 /** 946 * Callback interface used to signal the moment of actual image capture. 947 * 948 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 949 */ 950 public interface ShutterCallback 951 { 952 /** 953 * Called as near as possible to the moment when a photo is captured 954 * from the sensor. This is a good opportunity to play a shutter sound 955 * or give other feedback of camera operation. This may be some time 956 * after the photo was triggered, but some time before the actual data 957 * is available. 958 */ 959 void onShutter(); 960 } 961 962 /** 963 * Callback interface used to supply image data from a photo capture. 964 * 965 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 966 */ 967 public interface PictureCallback { 968 /** 969 * Called when image data is available after a picture is taken. 970 * The format of the data depends on the context of the callback 971 * and {@link Camera.Parameters} settings. 972 * 973 * @param data a byte array of the picture data 974 * @param camera the Camera service object 975 */ 976 void onPictureTaken(byte[] data, Camera camera); 977 }; 978 979 /** 980 * Equivalent to takePicture(shutter, raw, null, jpeg). 981 * 982 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 983 */ 984 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 985 PictureCallback jpeg) { 986 takePicture(shutter, raw, null, jpeg); 987 } 988 private native final void native_takePicture(int msgType); 989 990 /** 991 * Triggers an asynchronous image capture. The camera service will initiate 992 * a series of callbacks to the application as the image capture progresses. 993 * The shutter callback occurs after the image is captured. This can be used 994 * to trigger a sound to let the user know that image has been captured. The 995 * raw callback occurs when the raw image data is available (NOTE: the data 996 * will be null if there is no raw image callback buffer available or the 997 * raw image callback buffer is not large enough to hold the raw image). 998 * The postview callback occurs when a scaled, fully processed postview 999 * image is available (NOTE: not all hardware supports this). The jpeg 1000 * callback occurs when the compressed image is available. If the 1001 * application does not need a particular callback, a null can be passed 1002 * instead of a callback method. 1003 * 1004 * <p>This method is only valid when preview is active (after 1005 * {@link #startPreview()}). Preview will be stopped after the image is 1006 * taken; callers must call {@link #startPreview()} again if they want to 1007 * re-start preview or take more pictures. This should not be called between 1008 * {@link android.media.MediaRecorder#start()} and 1009 * {@link android.media.MediaRecorder#stop()}. 1010 * 1011 * <p>After calling this method, you must not call {@link #startPreview()} 1012 * or take another picture until the JPEG callback has returned. 1013 * 1014 * @param shutter the callback for image capture moment, or null 1015 * @param raw the callback for raw (uncompressed) image data, or null 1016 * @param postview callback with postview image data, may be null 1017 * @param jpeg the callback for JPEG image data, or null 1018 */ 1019 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1020 PictureCallback postview, PictureCallback jpeg) { 1021 mShutterCallback = shutter; 1022 mRawImageCallback = raw; 1023 mPostviewCallback = postview; 1024 mJpegCallback = jpeg; 1025 1026 // If callback is not set, do not send me callbacks. 1027 int msgType = 0; 1028 if (mShutterCallback != null) { 1029 msgType |= CAMERA_MSG_SHUTTER; 1030 } 1031 if (mRawImageCallback != null) { 1032 msgType |= CAMERA_MSG_RAW_IMAGE; 1033 } 1034 if (mPostviewCallback != null) { 1035 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1036 } 1037 if (mJpegCallback != null) { 1038 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1039 } 1040 1041 native_takePicture(msgType); 1042 } 1043 1044 /** 1045 * Zooms to the requested value smoothly. The driver will notify {@link 1046 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1047 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1048 * is called with value 3. The 1049 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1050 * method will be called three times with zoom values 1, 2, and 3. 1051 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1052 * Applications should not call startSmoothZoom again or change the zoom 1053 * value before zoom stops. If the supplied zoom value equals to the current 1054 * zoom value, no zoom callback will be generated. This method is supported 1055 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1056 * returns true. 1057 * 1058 * @param value zoom value. The valid range is 0 to {@link 1059 * android.hardware.Camera.Parameters#getMaxZoom}. 1060 * @throws IllegalArgumentException if the zoom value is invalid. 1061 * @throws RuntimeException if the method fails. 1062 * @see #setZoomChangeListener(OnZoomChangeListener) 1063 */ 1064 public native final void startSmoothZoom(int value); 1065 1066 /** 1067 * Stops the smooth zoom. Applications should wait for the {@link 1068 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1069 * method is supported if {@link 1070 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1071 * 1072 * @throws RuntimeException if the method fails. 1073 */ 1074 public native final void stopSmoothZoom(); 1075 1076 /** 1077 * Set the clockwise rotation of preview display in degrees. This affects 1078 * the preview frames and the picture displayed after snapshot. This method 1079 * is useful for portrait mode applications. Note that preview display of 1080 * front-facing cameras is flipped horizontally before the rotation, that 1081 * is, the image is reflected along the central vertical axis of the camera 1082 * sensor. So the users can see themselves as looking into a mirror. 1083 * 1084 * <p>This does not affect the order of byte array passed in {@link 1085 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1086 * method is not allowed to be called during preview. 1087 * 1088 * <p>If you want to make the camera image show in the same orientation as 1089 * the display, you can use the following code. 1090 * <pre> 1091 * public static void setCameraDisplayOrientation(Activity activity, 1092 * int cameraId, android.hardware.Camera camera) { 1093 * android.hardware.Camera.CameraInfo info = 1094 * new android.hardware.Camera.CameraInfo(); 1095 * android.hardware.Camera.getCameraInfo(cameraId, info); 1096 * int rotation = activity.getWindowManager().getDefaultDisplay() 1097 * .getRotation(); 1098 * int degrees = 0; 1099 * switch (rotation) { 1100 * case Surface.ROTATION_0: degrees = 0; break; 1101 * case Surface.ROTATION_90: degrees = 90; break; 1102 * case Surface.ROTATION_180: degrees = 180; break; 1103 * case Surface.ROTATION_270: degrees = 270; break; 1104 * } 1105 * 1106 * int result; 1107 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1108 * result = (info.orientation + degrees) % 360; 1109 * result = (360 - result) % 360; // compensate the mirror 1110 * } else { // back-facing 1111 * result = (info.orientation - degrees + 360) % 360; 1112 * } 1113 * camera.setDisplayOrientation(result); 1114 * } 1115 * </pre> 1116 * 1117 * <p>Starting from API level 14, this method can be called when preview is 1118 * active. 1119 * 1120 * @param degrees the angle that the picture will be rotated clockwise. 1121 * Valid values are 0, 90, 180, and 270. The starting 1122 * position is 0 (landscape). 1123 * @see #setPreviewDisplay(SurfaceHolder) 1124 */ 1125 public native final void setDisplayOrientation(int degrees); 1126 1127 /** 1128 * Callback interface for zoom changes during a smooth zoom operation. 1129 * 1130 * @see #setZoomChangeListener(OnZoomChangeListener) 1131 * @see #startSmoothZoom(int) 1132 */ 1133 public interface OnZoomChangeListener 1134 { 1135 /** 1136 * Called when the zoom value has changed during a smooth zoom. 1137 * 1138 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1139 * calls this for every new zoom value. 1140 * @param stopped whether smooth zoom is stopped. If the value is true, 1141 * this is the last zoom update for the application. 1142 * @param camera the Camera service object 1143 */ 1144 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1145 }; 1146 1147 /** 1148 * Registers a listener to be notified when the zoom value is updated by the 1149 * camera driver during smooth zoom. 1150 * 1151 * @param listener the listener to notify 1152 * @see #startSmoothZoom(int) 1153 */ 1154 public final void setZoomChangeListener(OnZoomChangeListener listener) 1155 { 1156 mZoomListener = listener; 1157 } 1158 1159 /** 1160 * Callback interface for face detected in the preview frame. 1161 * 1162 */ 1163 public interface FaceDetectionListener 1164 { 1165 /** 1166 * Notify the listener of the detected faces in the preview frame. 1167 * 1168 * @param faces The detected faces in a list 1169 * @param camera The {@link Camera} service object 1170 */ 1171 void onFaceDetection(Face[] faces, Camera camera); 1172 } 1173 1174 /** 1175 * Registers a listener to be notified about the faces detected in the 1176 * preview frame. 1177 * 1178 * @param listener the listener to notify 1179 * @see #startFaceDetection() 1180 */ 1181 public final void setFaceDetectionListener(FaceDetectionListener listener) 1182 { 1183 mFaceListener = listener; 1184 } 1185 1186 /** 1187 * Starts the face detection. This should be called after preview is started. 1188 * The camera will notify {@link FaceDetectionListener} of the detected 1189 * faces in the preview frame. The detected faces may be the same as the 1190 * previous ones. Applications should call {@link #stopFaceDetection} to 1191 * stop the face detection. This method is supported if {@link 1192 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1193 * If the face detection has started, apps should not call this again. 1194 * 1195 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1196 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1197 * have no effect. The camera uses the detected faces to do auto-white balance, 1198 * auto exposure, and autofocus. 1199 * 1200 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1201 * will stop sending face callbacks. The last face callback indicates the 1202 * areas used to do autofocus. After focus completes, face detection will 1203 * resume sending face callbacks. If the apps call {@link 1204 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1205 * 1206 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1207 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1208 * preview with {@link #startPreview()}, the apps should call this method 1209 * again to resume face detection.</p> 1210 * 1211 * @throws IllegalArgumentException if the face detection is unsupported. 1212 * @throws RuntimeException if the method fails or the face detection is 1213 * already running. 1214 * @see FaceDetectionListener 1215 * @see #stopFaceDetection() 1216 * @see Parameters#getMaxNumDetectedFaces() 1217 */ 1218 public final void startFaceDetection() { 1219 if (mFaceDetectionRunning) { 1220 throw new RuntimeException("Face detection is already running"); 1221 } 1222 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1223 mFaceDetectionRunning = true; 1224 } 1225 1226 /** 1227 * Stops the face detection. 1228 * 1229 * @see #startFaceDetection() 1230 */ 1231 public final void stopFaceDetection() { 1232 _stopFaceDetection(); 1233 mFaceDetectionRunning = false; 1234 } 1235 1236 private native final void _startFaceDetection(int type); 1237 private native final void _stopFaceDetection(); 1238 1239 /** 1240 * Information about a face identified through camera face detection. 1241 * 1242 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1243 * list of face objects for use in focusing and metering.</p> 1244 * 1245 * @see FaceDetectionListener 1246 */ 1247 public static class Face { 1248 /** 1249 * Create an empty face. 1250 */ 1251 public Face() { 1252 } 1253 1254 /** 1255 * Bounds of the face. (-1000, -1000) represents the top-left of the 1256 * camera field of view, and (1000, 1000) represents the bottom-right of 1257 * the field of view. For example, suppose the size of the viewfinder UI 1258 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1259 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1260 * guaranteed left < right and top < bottom. The coordinates can be 1261 * smaller than -1000 or bigger than 1000. But at least one vertex will 1262 * be within (-1000, -1000) and (1000, 1000). 1263 * 1264 * <p>The direction is relative to the sensor orientation, that is, what 1265 * the sensor sees. The direction is not affected by the rotation or 1266 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1267 * rectangle does not provide any information about face orientation.</p> 1268 * 1269 * <p>Here is the matrix to convert driver coordinates to View coordinates 1270 * in pixels.</p> 1271 * <pre> 1272 * Matrix matrix = new Matrix(); 1273 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1274 * // Need mirror for front camera. 1275 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1276 * matrix.setScale(mirror ? -1 : 1, 1); 1277 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1278 * matrix.postRotate(displayOrientation); 1279 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1280 * // UI coordinates range from (0, 0) to (width, height). 1281 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1282 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1283 * </pre> 1284 * 1285 * @see #startFaceDetection() 1286 */ 1287 public Rect rect; 1288 1289 /** 1290 * The confidence level for the detection of the face. The range is 1 to 100. 100 is the 1291 * highest confidence. 1292 * 1293 * @see #startFaceDetection() 1294 */ 1295 public int score; 1296 1297 /** 1298 * An unique id per face while the face is visible to the tracker. If 1299 * the face leaves the field-of-view and comes back, it will get a new 1300 * id. This is an optional field, may not be supported on all devices. 1301 * If not supported, id will always be set to -1. The optional fields 1302 * are supported as a set. Either they are all valid, or none of them 1303 * are. 1304 */ 1305 public int id = -1; 1306 1307 /** 1308 * The coordinates of the center of the left eye. The coordinates are in 1309 * the same space as the ones for {@link #rect}. This is an optional 1310 * field, may not be supported on all devices. If not supported, the 1311 * value will always be set to null. The optional fields are supported 1312 * as a set. Either they are all valid, or none of them are. 1313 */ 1314 public Point leftEye = null; 1315 1316 /** 1317 * The coordinates of the center of the right eye. The coordinates are 1318 * in the same space as the ones for {@link #rect}.This is an optional 1319 * field, may not be supported on all devices. If not supported, the 1320 * value will always be set to null. The optional fields are supported 1321 * as a set. Either they are all valid, or none of them are. 1322 */ 1323 public Point rightEye = null; 1324 1325 /** 1326 * The coordinates of the center of the mouth. The coordinates are in 1327 * the same space as the ones for {@link #rect}. This is an optional 1328 * field, may not be supported on all devices. If not supported, the 1329 * value will always be set to null. The optional fields are supported 1330 * as a set. Either they are all valid, or none of them are. 1331 */ 1332 public Point mouth = null; 1333 } 1334 1335 // Error codes match the enum in include/ui/Camera.h 1336 1337 /** 1338 * Unspecified camera error. 1339 * @see Camera.ErrorCallback 1340 */ 1341 public static final int CAMERA_ERROR_UNKNOWN = 1; 1342 1343 /** 1344 * Media server died. In this case, the application must release the 1345 * Camera object and instantiate a new one. 1346 * @see Camera.ErrorCallback 1347 */ 1348 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1349 1350 /** 1351 * Callback interface for camera error notification. 1352 * 1353 * @see #setErrorCallback(ErrorCallback) 1354 */ 1355 public interface ErrorCallback 1356 { 1357 /** 1358 * Callback for camera errors. 1359 * @param error error code: 1360 * <ul> 1361 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1362 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1363 * </ul> 1364 * @param camera the Camera service object 1365 */ 1366 void onError(int error, Camera camera); 1367 }; 1368 1369 /** 1370 * Registers a callback to be invoked when an error occurs. 1371 * @param cb The callback to run 1372 */ 1373 public final void setErrorCallback(ErrorCallback cb) 1374 { 1375 mErrorCallback = cb; 1376 } 1377 1378 private native final void native_setParameters(String params); 1379 private native final String native_getParameters(); 1380 1381 /** 1382 * Changes the settings for this Camera service. 1383 * 1384 * @param params the Parameters to use for this Camera service 1385 * @throws RuntimeException if any parameter is invalid or not supported. 1386 * @see #getParameters() 1387 */ 1388 public void setParameters(Parameters params) { 1389 native_setParameters(params.flatten()); 1390 } 1391 1392 /** 1393 * Returns the current settings for this Camera service. 1394 * If modifications are made to the returned Parameters, they must be passed 1395 * to {@link #setParameters(Camera.Parameters)} to take effect. 1396 * 1397 * @see #setParameters(Camera.Parameters) 1398 */ 1399 public Parameters getParameters() { 1400 Parameters p = new Parameters(); 1401 String s = native_getParameters(); 1402 p.unflatten(s); 1403 return p; 1404 } 1405 1406 /** 1407 * Returns an empty {@link Parameters} for testing purpose. 1408 * 1409 * @return a Parameter object. 1410 * 1411 * @hide 1412 */ 1413 public static Parameters getEmptyParameters() { 1414 Camera camera = new Camera(); 1415 return camera.new Parameters(); 1416 } 1417 1418 /** 1419 * Image size (width and height dimensions). 1420 */ 1421 public class Size { 1422 /** 1423 * Sets the dimensions for pictures. 1424 * 1425 * @param w the photo width (pixels) 1426 * @param h the photo height (pixels) 1427 */ 1428 public Size(int w, int h) { 1429 width = w; 1430 height = h; 1431 } 1432 /** 1433 * Compares {@code obj} to this size. 1434 * 1435 * @param obj the object to compare this size with. 1436 * @return {@code true} if the width and height of {@code obj} is the 1437 * same as those of this size. {@code false} otherwise. 1438 */ 1439 @Override 1440 public boolean equals(Object obj) { 1441 if (!(obj instanceof Size)) { 1442 return false; 1443 } 1444 Size s = (Size) obj; 1445 return width == s.width && height == s.height; 1446 } 1447 @Override 1448 public int hashCode() { 1449 return width * 32713 + height; 1450 } 1451 /** width of the picture */ 1452 public int width; 1453 /** height of the picture */ 1454 public int height; 1455 }; 1456 1457 /** 1458 * <p>The Area class is used for choosing specific metering and focus areas for 1459 * the camera to use when calculating auto-exposure, auto-white balance, and 1460 * auto-focus.</p> 1461 * 1462 * <p>To find out how many simultaneous areas a given camera supports, use 1463 * {@link Parameters#getMaxNumMeteringAreas()} and 1464 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1465 * selection is unsupported, these methods will return 0.</p> 1466 * 1467 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1468 * that determines its importance. The bounds are relative to the camera's 1469 * current field of view. The coordinates are mapped so that (-1000, -1000) 1470 * is always the top-left corner of the current field of view, and (1000, 1471 * 1000) is always the bottom-right corner of the current field of 1472 * view. Setting Areas with bounds outside that range is not allowed. Areas 1473 * with zero or negative width or height are not allowed.</p> 1474 * 1475 * <p>The weight must range from 1 to 1000, and represents a weight for 1476 * every pixel in the area. This means that a large metering area with 1477 * the same weight as a smaller area will have more effect in the 1478 * metering result. Metering areas can overlap and the driver 1479 * will add the weights in the overlap region.</p> 1480 * 1481 * @see Parameters#setFocusAreas(List) 1482 * @see Parameters#getFocusAreas() 1483 * @see Parameters#getMaxNumFocusAreas() 1484 * @see Parameters#setMeteringAreas(List) 1485 * @see Parameters#getMeteringAreas() 1486 * @see Parameters#getMaxNumMeteringAreas() 1487 */ 1488 public static class Area { 1489 /** 1490 * Create an area with specified rectangle and weight. 1491 * 1492 * @param rect the bounds of the area. 1493 * @param weight the weight of the area. 1494 */ 1495 public Area(Rect rect, int weight) { 1496 this.rect = rect; 1497 this.weight = weight; 1498 } 1499 /** 1500 * Compares {@code obj} to this area. 1501 * 1502 * @param obj the object to compare this area with. 1503 * @return {@code true} if the rectangle and weight of {@code obj} is 1504 * the same as those of this area. {@code false} otherwise. 1505 */ 1506 @Override 1507 public boolean equals(Object obj) { 1508 if (!(obj instanceof Area)) { 1509 return false; 1510 } 1511 Area a = (Area) obj; 1512 if (rect == null) { 1513 if (a.rect != null) return false; 1514 } else { 1515 if (!rect.equals(a.rect)) return false; 1516 } 1517 return weight == a.weight; 1518 } 1519 1520 /** 1521 * Bounds of the area. (-1000, -1000) represents the top-left of the 1522 * camera field of view, and (1000, 1000) represents the bottom-right of 1523 * the field of view. Setting bounds outside that range is not 1524 * allowed. Bounds with zero or negative width or height are not 1525 * allowed. 1526 * 1527 * @see Parameters#getFocusAreas() 1528 * @see Parameters#getMeteringAreas() 1529 */ 1530 public Rect rect; 1531 1532 /** 1533 * Weight of the area. The weight must range from 1 to 1000, and 1534 * represents a weight for every pixel in the area. This means that a 1535 * large metering area with the same weight as a smaller area will have 1536 * more effect in the metering result. Metering areas can overlap and 1537 * the driver will add the weights in the overlap region. 1538 * 1539 * @see Parameters#getFocusAreas() 1540 * @see Parameters#getMeteringAreas() 1541 */ 1542 public int weight; 1543 } 1544 1545 /** 1546 * Camera service settings. 1547 * 1548 * <p>To make camera parameters take effect, applications have to call 1549 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1550 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1551 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1552 * is called with the changed parameters object. 1553 * 1554 * <p>Different devices may have different camera capabilities, such as 1555 * picture size or flash modes. The application should query the camera 1556 * capabilities before setting parameters. For example, the application 1557 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1558 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1559 * camera does not support color effects, 1560 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1561 */ 1562 public class Parameters { 1563 // Parameter keys to communicate with the camera driver. 1564 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1565 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1566 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1567 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1568 private static final String KEY_PICTURE_SIZE = "picture-size"; 1569 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1570 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1571 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1572 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1573 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1574 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1575 private static final String KEY_ROTATION = "rotation"; 1576 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1577 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1578 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1579 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1580 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1581 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1582 private static final String KEY_EFFECT = "effect"; 1583 private static final String KEY_ANTIBANDING = "antibanding"; 1584 private static final String KEY_SCENE_MODE = "scene-mode"; 1585 private static final String KEY_FLASH_MODE = "flash-mode"; 1586 private static final String KEY_FOCUS_MODE = "focus-mode"; 1587 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1588 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1589 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1590 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1591 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1592 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1593 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1594 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1595 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1596 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1597 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1598 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1599 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1600 private static final String KEY_METERING_AREAS = "metering-areas"; 1601 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1602 private static final String KEY_ZOOM = "zoom"; 1603 private static final String KEY_MAX_ZOOM = "max-zoom"; 1604 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1605 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1606 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1607 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1608 private static final String KEY_VIDEO_SIZE = "video-size"; 1609 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1610 "preferred-preview-size-for-video"; 1611 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 1612 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 1613 private static final String KEY_RECORDING_HINT = "recording-hint"; 1614 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 1615 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 1616 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 1617 1618 // Parameter key suffix for supported values. 1619 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1620 1621 private static final String TRUE = "true"; 1622 private static final String FALSE = "false"; 1623 1624 // Values for white balance settings. 1625 public static final String WHITE_BALANCE_AUTO = "auto"; 1626 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1627 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1628 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1629 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1630 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1631 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1632 public static final String WHITE_BALANCE_SHADE = "shade"; 1633 1634 // Values for color effect settings. 1635 public static final String EFFECT_NONE = "none"; 1636 public static final String EFFECT_MONO = "mono"; 1637 public static final String EFFECT_NEGATIVE = "negative"; 1638 public static final String EFFECT_SOLARIZE = "solarize"; 1639 public static final String EFFECT_SEPIA = "sepia"; 1640 public static final String EFFECT_POSTERIZE = "posterize"; 1641 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1642 public static final String EFFECT_BLACKBOARD = "blackboard"; 1643 public static final String EFFECT_AQUA = "aqua"; 1644 1645 // Values for antibanding settings. 1646 public static final String ANTIBANDING_AUTO = "auto"; 1647 public static final String ANTIBANDING_50HZ = "50hz"; 1648 public static final String ANTIBANDING_60HZ = "60hz"; 1649 public static final String ANTIBANDING_OFF = "off"; 1650 1651 // Values for flash mode settings. 1652 /** 1653 * Flash will not be fired. 1654 */ 1655 public static final String FLASH_MODE_OFF = "off"; 1656 1657 /** 1658 * Flash will be fired automatically when required. The flash may be fired 1659 * during preview, auto-focus, or snapshot depending on the driver. 1660 */ 1661 public static final String FLASH_MODE_AUTO = "auto"; 1662 1663 /** 1664 * Flash will always be fired during snapshot. The flash may also be 1665 * fired during preview or auto-focus depending on the driver. 1666 */ 1667 public static final String FLASH_MODE_ON = "on"; 1668 1669 /** 1670 * Flash will be fired in red-eye reduction mode. 1671 */ 1672 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1673 1674 /** 1675 * Constant emission of light during preview, auto-focus and snapshot. 1676 * This can also be used for video recording. 1677 */ 1678 public static final String FLASH_MODE_TORCH = "torch"; 1679 1680 /** 1681 * Scene mode is off. 1682 */ 1683 public static final String SCENE_MODE_AUTO = "auto"; 1684 1685 /** 1686 * Take photos of fast moving objects. Same as {@link 1687 * #SCENE_MODE_SPORTS}. 1688 */ 1689 public static final String SCENE_MODE_ACTION = "action"; 1690 1691 /** 1692 * Take people pictures. 1693 */ 1694 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1695 1696 /** 1697 * Take pictures on distant objects. 1698 */ 1699 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1700 1701 /** 1702 * Take photos at night. 1703 */ 1704 public static final String SCENE_MODE_NIGHT = "night"; 1705 1706 /** 1707 * Take people pictures at night. 1708 */ 1709 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1710 1711 /** 1712 * Take photos in a theater. Flash light is off. 1713 */ 1714 public static final String SCENE_MODE_THEATRE = "theatre"; 1715 1716 /** 1717 * Take pictures on the beach. 1718 */ 1719 public static final String SCENE_MODE_BEACH = "beach"; 1720 1721 /** 1722 * Take pictures on the snow. 1723 */ 1724 public static final String SCENE_MODE_SNOW = "snow"; 1725 1726 /** 1727 * Take sunset photos. 1728 */ 1729 public static final String SCENE_MODE_SUNSET = "sunset"; 1730 1731 /** 1732 * Avoid blurry pictures (for example, due to hand shake). 1733 */ 1734 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1735 1736 /** 1737 * For shooting firework displays. 1738 */ 1739 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1740 1741 /** 1742 * Take photos of fast moving objects. Same as {@link 1743 * #SCENE_MODE_ACTION}. 1744 */ 1745 public static final String SCENE_MODE_SPORTS = "sports"; 1746 1747 /** 1748 * Take indoor low-light shot. 1749 */ 1750 public static final String SCENE_MODE_PARTY = "party"; 1751 1752 /** 1753 * Capture the naturally warm color of scenes lit by candles. 1754 */ 1755 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1756 1757 /** 1758 * Applications are looking for a barcode. Camera driver will be 1759 * optimized for barcode reading. 1760 */ 1761 public static final String SCENE_MODE_BARCODE = "barcode"; 1762 1763 /** 1764 * Auto-focus mode. Applications should call {@link 1765 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1766 */ 1767 public static final String FOCUS_MODE_AUTO = "auto"; 1768 1769 /** 1770 * Focus is set at infinity. Applications should not call 1771 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1772 */ 1773 public static final String FOCUS_MODE_INFINITY = "infinity"; 1774 1775 /** 1776 * Macro (close-up) focus mode. Applications should call 1777 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1778 * mode. 1779 */ 1780 public static final String FOCUS_MODE_MACRO = "macro"; 1781 1782 /** 1783 * Focus is fixed. The camera is always in this mode if the focus is not 1784 * adjustable. If the camera has auto-focus, this mode can fix the 1785 * focus, which is usually at hyperfocal distance. Applications should 1786 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1787 */ 1788 public static final String FOCUS_MODE_FIXED = "fixed"; 1789 1790 /** 1791 * Extended depth of field (EDOF). Focusing is done digitally and 1792 * continuously. Applications should not call {@link 1793 * #autoFocus(AutoFocusCallback)} in this mode. 1794 */ 1795 public static final String FOCUS_MODE_EDOF = "edof"; 1796 1797 /** 1798 * Continuous auto focus mode intended for video recording. The camera 1799 * continuously tries to focus. This is the best choice for video 1800 * recording because the focus changes smoothly . Applications still can 1801 * call {@link #takePicture(Camera.ShutterCallback, 1802 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 1803 * subject may not be in focus. Auto focus starts when the parameter is 1804 * set. 1805 * 1806 * <p>Since API level 14, applications can call {@link 1807 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 1808 * immediately return with a boolean that indicates whether the focus is 1809 * sharp or not. The focus position is locked after autoFocus call. If 1810 * applications want to resume the continuous focus, cancelAutoFocus 1811 * must be called. Restarting the preview will not resume the continuous 1812 * autofocus. To stop continuous focus, applications should change the 1813 * focus mode to other modes. 1814 * 1815 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 1816 */ 1817 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1818 1819 /** 1820 * Continuous auto focus mode intended for taking pictures. The camera 1821 * continuously tries to focus. The speed of focus change is more 1822 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 1823 * starts when the parameter is set. 1824 * 1825 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 1826 * this mode. If the autofocus is in the middle of scanning, the focus 1827 * callback will return when it completes. If the autofocus is not 1828 * scanning, the focus callback will immediately return with a boolean 1829 * that indicates whether the focus is sharp or not. The apps can then 1830 * decide if they want to take a picture immediately or to change the 1831 * focus mode to auto, and run a full autofocus cycle. The focus 1832 * position is locked after autoFocus call. If applications want to 1833 * resume the continuous focus, cancelAutoFocus must be called. 1834 * Restarting the preview will not resume the continuous autofocus. To 1835 * stop continuous focus, applications should change the focus mode to 1836 * other modes. 1837 * 1838 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 1839 */ 1840 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 1841 1842 // Indices for focus distance array. 1843 /** 1844 * The array index of near focus distance for use with 1845 * {@link #getFocusDistances(float[])}. 1846 */ 1847 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1848 1849 /** 1850 * The array index of optimal focus distance for use with 1851 * {@link #getFocusDistances(float[])}. 1852 */ 1853 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1854 1855 /** 1856 * The array index of far focus distance for use with 1857 * {@link #getFocusDistances(float[])}. 1858 */ 1859 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1860 1861 /** 1862 * The array index of minimum preview fps for use with {@link 1863 * #getPreviewFpsRange(int[])} or {@link 1864 * #getSupportedPreviewFpsRange()}. 1865 */ 1866 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1867 1868 /** 1869 * The array index of maximum preview fps for use with {@link 1870 * #getPreviewFpsRange(int[])} or {@link 1871 * #getSupportedPreviewFpsRange()}. 1872 */ 1873 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1874 1875 // Formats for setPreviewFormat and setPictureFormat. 1876 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1877 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1878 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1879 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1880 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1881 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1882 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 1883 1884 private HashMap<String, String> mMap; 1885 1886 private Parameters() { 1887 mMap = new HashMap<String, String>(); 1888 } 1889 1890 /** 1891 * Writes the current Parameters to the log. 1892 * @hide 1893 * @deprecated 1894 */ 1895 public void dump() { 1896 Log.e(TAG, "dump: size=" + mMap.size()); 1897 for (String k : mMap.keySet()) { 1898 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1899 } 1900 } 1901 1902 /** 1903 * Creates a single string with all the parameters set in 1904 * this Parameters object. 1905 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1906 * 1907 * @return a String with all values from this Parameters object, in 1908 * semi-colon delimited key-value pairs 1909 */ 1910 public String flatten() { 1911 StringBuilder flattened = new StringBuilder(); 1912 for (String k : mMap.keySet()) { 1913 flattened.append(k); 1914 flattened.append("="); 1915 flattened.append(mMap.get(k)); 1916 flattened.append(";"); 1917 } 1918 // chop off the extra semicolon at the end 1919 flattened.deleteCharAt(flattened.length()-1); 1920 return flattened.toString(); 1921 } 1922 1923 /** 1924 * Takes a flattened string of parameters and adds each one to 1925 * this Parameters object. 1926 * <p>The {@link #flatten()} method does the reverse.</p> 1927 * 1928 * @param flattened a String of parameters (key-value paired) that 1929 * are semi-colon delimited 1930 */ 1931 public void unflatten(String flattened) { 1932 mMap.clear(); 1933 1934 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1935 while (tokenizer.hasMoreElements()) { 1936 String kv = tokenizer.nextToken(); 1937 int pos = kv.indexOf('='); 1938 if (pos == -1) { 1939 continue; 1940 } 1941 String k = kv.substring(0, pos); 1942 String v = kv.substring(pos + 1); 1943 mMap.put(k, v); 1944 } 1945 } 1946 1947 public void remove(String key) { 1948 mMap.remove(key); 1949 } 1950 1951 /** 1952 * Sets a String parameter. 1953 * 1954 * @param key the key name for the parameter 1955 * @param value the String value of the parameter 1956 */ 1957 public void set(String key, String value) { 1958 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 1959 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 1960 return; 1961 } 1962 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 1963 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 1964 return; 1965 } 1966 1967 mMap.put(key, value); 1968 } 1969 1970 /** 1971 * Sets an integer parameter. 1972 * 1973 * @param key the key name for the parameter 1974 * @param value the int value of the parameter 1975 */ 1976 public void set(String key, int value) { 1977 mMap.put(key, Integer.toString(value)); 1978 } 1979 1980 private void set(String key, List<Area> areas) { 1981 if (areas == null) { 1982 set(key, "(0,0,0,0,0)"); 1983 } else { 1984 StringBuilder buffer = new StringBuilder(); 1985 for (int i = 0; i < areas.size(); i++) { 1986 Area area = areas.get(i); 1987 Rect rect = area.rect; 1988 buffer.append('('); 1989 buffer.append(rect.left); 1990 buffer.append(','); 1991 buffer.append(rect.top); 1992 buffer.append(','); 1993 buffer.append(rect.right); 1994 buffer.append(','); 1995 buffer.append(rect.bottom); 1996 buffer.append(','); 1997 buffer.append(area.weight); 1998 buffer.append(')'); 1999 if (i != areas.size() - 1) buffer.append(','); 2000 } 2001 set(key, buffer.toString()); 2002 } 2003 } 2004 2005 /** 2006 * Returns the value of a String parameter. 2007 * 2008 * @param key the key name for the parameter 2009 * @return the String value of the parameter 2010 */ 2011 public String get(String key) { 2012 return mMap.get(key); 2013 } 2014 2015 /** 2016 * Returns the value of an integer parameter. 2017 * 2018 * @param key the key name for the parameter 2019 * @return the int value of the parameter 2020 */ 2021 public int getInt(String key) { 2022 return Integer.parseInt(mMap.get(key)); 2023 } 2024 2025 /** 2026 * Sets the dimensions for preview pictures. If the preview has already 2027 * started, applications should stop the preview first before changing 2028 * preview size. 2029 * 2030 * The sides of width and height are based on camera orientation. That 2031 * is, the preview size is the size before it is rotated by display 2032 * orientation. So applications need to consider the display orientation 2033 * while setting preview size. For example, suppose the camera supports 2034 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2035 * preview ratio. If the display orientation is set to 0 or 180, preview 2036 * size should be set to 480x320. If the display orientation is set to 2037 * 90 or 270, preview size should be set to 320x480. The display 2038 * orientation should also be considered while setting picture size and 2039 * thumbnail size. 2040 * 2041 * @param width the width of the pictures, in pixels 2042 * @param height the height of the pictures, in pixels 2043 * @see #setDisplayOrientation(int) 2044 * @see #getCameraInfo(int, CameraInfo) 2045 * @see #setPictureSize(int, int) 2046 * @see #setJpegThumbnailSize(int, int) 2047 */ 2048 public void setPreviewSize(int width, int height) { 2049 String v = Integer.toString(width) + "x" + Integer.toString(height); 2050 set(KEY_PREVIEW_SIZE, v); 2051 } 2052 2053 /** 2054 * Returns the dimensions setting for preview pictures. 2055 * 2056 * @return a Size object with the width and height setting 2057 * for the preview picture 2058 */ 2059 public Size getPreviewSize() { 2060 String pair = get(KEY_PREVIEW_SIZE); 2061 return strToSize(pair); 2062 } 2063 2064 /** 2065 * Gets the supported preview sizes. 2066 * 2067 * @return a list of Size object. This method will always return a list 2068 * with at least one element. 2069 */ 2070 public List<Size> getSupportedPreviewSizes() { 2071 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2072 return splitSize(str); 2073 } 2074 2075 /** 2076 * <p>Gets the supported video frame sizes that can be used by 2077 * MediaRecorder.</p> 2078 * 2079 * <p>If the returned list is not null, the returned list will contain at 2080 * least one Size and one of the sizes in the returned list must be 2081 * passed to MediaRecorder.setVideoSize() for camcorder application if 2082 * camera is used as the video source. In this case, the size of the 2083 * preview can be different from the resolution of the recorded video 2084 * during video recording.</p> 2085 * 2086 * @return a list of Size object if camera has separate preview and 2087 * video output; otherwise, null is returned. 2088 * @see #getPreferredPreviewSizeForVideo() 2089 */ 2090 public List<Size> getSupportedVideoSizes() { 2091 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2092 return splitSize(str); 2093 } 2094 2095 /** 2096 * Returns the preferred or recommended preview size (width and height) 2097 * in pixels for video recording. Camcorder applications should 2098 * set the preview size to a value that is not larger than the 2099 * preferred preview size. In other words, the product of the width 2100 * and height of the preview size should not be larger than that of 2101 * the preferred preview size. In addition, we recommend to choose a 2102 * preview size that has the same aspect ratio as the resolution of 2103 * video to be recorded. 2104 * 2105 * @return the preferred preview size (width and height) in pixels for 2106 * video recording if getSupportedVideoSizes() does not return 2107 * null; otherwise, null is returned. 2108 * @see #getSupportedVideoSizes() 2109 */ 2110 public Size getPreferredPreviewSizeForVideo() { 2111 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2112 return strToSize(pair); 2113 } 2114 2115 /** 2116 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2117 * applications set both width and height to 0, EXIF will not contain 2118 * thumbnail.</p> 2119 * 2120 * <p>Applications need to consider the display orientation. See {@link 2121 * #setPreviewSize(int,int)} for reference.</p> 2122 * 2123 * @param width the width of the thumbnail, in pixels 2124 * @param height the height of the thumbnail, in pixels 2125 * @see #setPreviewSize(int,int) 2126 */ 2127 public void setJpegThumbnailSize(int width, int height) { 2128 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2129 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2130 } 2131 2132 /** 2133 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2134 * 2135 * @return a Size object with the height and width setting for the EXIF 2136 * thumbnails 2137 */ 2138 public Size getJpegThumbnailSize() { 2139 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2140 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2141 } 2142 2143 /** 2144 * Gets the supported jpeg thumbnail sizes. 2145 * 2146 * @return a list of Size object. This method will always return a list 2147 * with at least two elements. Size 0,0 (no thumbnail) is always 2148 * supported. 2149 */ 2150 public List<Size> getSupportedJpegThumbnailSizes() { 2151 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2152 return splitSize(str); 2153 } 2154 2155 /** 2156 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2157 * 2158 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2159 * to 100, with 100 being the best. 2160 */ 2161 public void setJpegThumbnailQuality(int quality) { 2162 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2163 } 2164 2165 /** 2166 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2167 * 2168 * @return the JPEG quality setting of the EXIF thumbnail. 2169 */ 2170 public int getJpegThumbnailQuality() { 2171 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2172 } 2173 2174 /** 2175 * Sets Jpeg quality of captured picture. 2176 * 2177 * @param quality the JPEG quality of captured picture. The range is 1 2178 * to 100, with 100 being the best. 2179 */ 2180 public void setJpegQuality(int quality) { 2181 set(KEY_JPEG_QUALITY, quality); 2182 } 2183 2184 /** 2185 * Returns the quality setting for the JPEG picture. 2186 * 2187 * @return the JPEG picture quality setting. 2188 */ 2189 public int getJpegQuality() { 2190 return getInt(KEY_JPEG_QUALITY); 2191 } 2192 2193 /** 2194 * Sets the rate at which preview frames are received. This is the 2195 * target frame rate. The actual frame rate depends on the driver. 2196 * 2197 * @param fps the frame rate (frames per second) 2198 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2199 */ 2200 @Deprecated 2201 public void setPreviewFrameRate(int fps) { 2202 set(KEY_PREVIEW_FRAME_RATE, fps); 2203 } 2204 2205 /** 2206 * Returns the setting for the rate at which preview frames are 2207 * received. This is the target frame rate. The actual frame rate 2208 * depends on the driver. 2209 * 2210 * @return the frame rate setting (frames per second) 2211 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2212 */ 2213 @Deprecated 2214 public int getPreviewFrameRate() { 2215 return getInt(KEY_PREVIEW_FRAME_RATE); 2216 } 2217 2218 /** 2219 * Gets the supported preview frame rates. 2220 * 2221 * @return a list of supported preview frame rates. null if preview 2222 * frame rate setting is not supported. 2223 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2224 */ 2225 @Deprecated 2226 public List<Integer> getSupportedPreviewFrameRates() { 2227 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2228 return splitInt(str); 2229 } 2230 2231 /** 2232 * Sets the maximum and maximum preview fps. This controls the rate of 2233 * preview frames received in {@link PreviewCallback}. The minimum and 2234 * maximum preview fps must be one of the elements from {@link 2235 * #getSupportedPreviewFpsRange}. 2236 * 2237 * @param min the minimum preview fps (scaled by 1000). 2238 * @param max the maximum preview fps (scaled by 1000). 2239 * @throws RuntimeException if fps range is invalid. 2240 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2241 * @see #getSupportedPreviewFpsRange() 2242 */ 2243 public void setPreviewFpsRange(int min, int max) { 2244 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2245 } 2246 2247 /** 2248 * Returns the current minimum and maximum preview fps. The values are 2249 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2250 * 2251 * @return range the minimum and maximum preview fps (scaled by 1000). 2252 * @see #PREVIEW_FPS_MIN_INDEX 2253 * @see #PREVIEW_FPS_MAX_INDEX 2254 * @see #getSupportedPreviewFpsRange() 2255 */ 2256 public void getPreviewFpsRange(int[] range) { 2257 if (range == null || range.length != 2) { 2258 throw new IllegalArgumentException( 2259 "range must be an array with two elements."); 2260 } 2261 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2262 } 2263 2264 /** 2265 * Gets the supported preview fps (frame-per-second) ranges. Each range 2266 * contains a minimum fps and maximum fps. If minimum fps equals to 2267 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2268 * the camera outputs frames in auto frame rate. The actual frame rate 2269 * fluctuates between the minimum and the maximum. The values are 2270 * multiplied by 1000 and represented in integers. For example, if frame 2271 * rate is 26.623 frames per second, the value is 26623. 2272 * 2273 * @return a list of supported preview fps ranges. This method returns a 2274 * list with at least one element. Every element is an int array 2275 * of two values - minimum fps and maximum fps. The list is 2276 * sorted from small to large (first by maximum fps and then 2277 * minimum fps). 2278 * @see #PREVIEW_FPS_MIN_INDEX 2279 * @see #PREVIEW_FPS_MAX_INDEX 2280 */ 2281 public List<int[]> getSupportedPreviewFpsRange() { 2282 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2283 return splitRange(str); 2284 } 2285 2286 /** 2287 * Sets the image format for preview pictures. 2288 * <p>If this is never called, the default format will be 2289 * {@link android.graphics.ImageFormat#NV21}, which 2290 * uses the NV21 encoding format.</p> 2291 * 2292 * @param pixel_format the desired preview picture format, defined 2293 * by one of the {@link android.graphics.ImageFormat} constants. 2294 * (E.g., <var>ImageFormat.NV21</var> (default), 2295 * <var>ImageFormat.RGB_565</var>, or 2296 * <var>ImageFormat.JPEG</var>) 2297 * @see android.graphics.ImageFormat 2298 */ 2299 public void setPreviewFormat(int pixel_format) { 2300 String s = cameraFormatForPixelFormat(pixel_format); 2301 if (s == null) { 2302 throw new IllegalArgumentException( 2303 "Invalid pixel_format=" + pixel_format); 2304 } 2305 2306 set(KEY_PREVIEW_FORMAT, s); 2307 } 2308 2309 /** 2310 * Returns the image format for preview frames got from 2311 * {@link PreviewCallback}. 2312 * 2313 * @return the preview format. 2314 * @see android.graphics.ImageFormat 2315 */ 2316 public int getPreviewFormat() { 2317 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2318 } 2319 2320 /** 2321 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2322 * is always supported. {@link android.graphics.ImageFormat#YV12} 2323 * is always supported since API level 12. 2324 * 2325 * @return a list of supported preview formats. This method will always 2326 * return a list with at least one element. 2327 * @see android.graphics.ImageFormat 2328 */ 2329 public List<Integer> getSupportedPreviewFormats() { 2330 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2331 ArrayList<Integer> formats = new ArrayList<Integer>(); 2332 for (String s : split(str)) { 2333 int f = pixelFormatForCameraFormat(s); 2334 if (f == ImageFormat.UNKNOWN) continue; 2335 formats.add(f); 2336 } 2337 return formats; 2338 } 2339 2340 /** 2341 * <p>Sets the dimensions for pictures.</p> 2342 * 2343 * <p>Applications need to consider the display orientation. See {@link 2344 * #setPreviewSize(int,int)} for reference.</p> 2345 * 2346 * @param width the width for pictures, in pixels 2347 * @param height the height for pictures, in pixels 2348 * @see #setPreviewSize(int,int) 2349 * 2350 */ 2351 public void setPictureSize(int width, int height) { 2352 String v = Integer.toString(width) + "x" + Integer.toString(height); 2353 set(KEY_PICTURE_SIZE, v); 2354 } 2355 2356 /** 2357 * Returns the dimension setting for pictures. 2358 * 2359 * @return a Size object with the height and width setting 2360 * for pictures 2361 */ 2362 public Size getPictureSize() { 2363 String pair = get(KEY_PICTURE_SIZE); 2364 return strToSize(pair); 2365 } 2366 2367 /** 2368 * Gets the supported picture sizes. 2369 * 2370 * @return a list of supported picture sizes. This method will always 2371 * return a list with at least one element. 2372 */ 2373 public List<Size> getSupportedPictureSizes() { 2374 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2375 return splitSize(str); 2376 } 2377 2378 /** 2379 * Sets the image format for pictures. 2380 * 2381 * @param pixel_format the desired picture format 2382 * (<var>ImageFormat.NV21</var>, 2383 * <var>ImageFormat.RGB_565</var>, or 2384 * <var>ImageFormat.JPEG</var>) 2385 * @see android.graphics.ImageFormat 2386 */ 2387 public void setPictureFormat(int pixel_format) { 2388 String s = cameraFormatForPixelFormat(pixel_format); 2389 if (s == null) { 2390 throw new IllegalArgumentException( 2391 "Invalid pixel_format=" + pixel_format); 2392 } 2393 2394 set(KEY_PICTURE_FORMAT, s); 2395 } 2396 2397 /** 2398 * Returns the image format for pictures. 2399 * 2400 * @return the picture format 2401 * @see android.graphics.ImageFormat 2402 */ 2403 public int getPictureFormat() { 2404 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2405 } 2406 2407 /** 2408 * Gets the supported picture formats. 2409 * 2410 * @return supported picture formats. This method will always return a 2411 * list with at least one element. 2412 * @see android.graphics.ImageFormat 2413 */ 2414 public List<Integer> getSupportedPictureFormats() { 2415 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2416 ArrayList<Integer> formats = new ArrayList<Integer>(); 2417 for (String s : split(str)) { 2418 int f = pixelFormatForCameraFormat(s); 2419 if (f == ImageFormat.UNKNOWN) continue; 2420 formats.add(f); 2421 } 2422 return formats; 2423 } 2424 2425 private String cameraFormatForPixelFormat(int pixel_format) { 2426 switch(pixel_format) { 2427 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2428 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2429 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2430 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2431 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2432 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2433 case ImageFormat.BAYER_RGGB: return PIXEL_FORMAT_BAYER_RGGB; 2434 default: return null; 2435 } 2436 } 2437 2438 private int pixelFormatForCameraFormat(String format) { 2439 if (format == null) 2440 return ImageFormat.UNKNOWN; 2441 2442 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2443 return ImageFormat.NV16; 2444 2445 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2446 return ImageFormat.NV21; 2447 2448 if (format.equals(PIXEL_FORMAT_YUV422I)) 2449 return ImageFormat.YUY2; 2450 2451 if (format.equals(PIXEL_FORMAT_YUV420P)) 2452 return ImageFormat.YV12; 2453 2454 if (format.equals(PIXEL_FORMAT_RGB565)) 2455 return ImageFormat.RGB_565; 2456 2457 if (format.equals(PIXEL_FORMAT_JPEG)) 2458 return ImageFormat.JPEG; 2459 2460 return ImageFormat.UNKNOWN; 2461 } 2462 2463 /** 2464 * Sets the clockwise rotation angle in degrees relative to the 2465 * orientation of the camera. This affects the pictures returned from 2466 * JPEG {@link PictureCallback}. The camera driver may set orientation 2467 * in the EXIF header without rotating the picture. Or the driver may 2468 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 2469 * rotated, the orientation in the EXIF header will be missing or 1 2470 * (row #0 is top and column #0 is left side). 2471 * 2472 * <p>If applications want to rotate the picture to match the orientation 2473 * of what users see, apps should use {@link 2474 * android.view.OrientationEventListener} and {@link CameraInfo}. 2475 * The value from OrientationEventListener is relative to the natural 2476 * orientation of the device. CameraInfo.orientation is the angle 2477 * between camera orientation and natural device orientation. The sum 2478 * of the two is the rotation angle for back-facing camera. The 2479 * difference of the two is the rotation angle for front-facing camera. 2480 * Note that the JPEG pictures of front-facing cameras are not mirrored 2481 * as in preview display. 2482 * 2483 * <p>For example, suppose the natural orientation of the device is 2484 * portrait. The device is rotated 270 degrees clockwise, so the device 2485 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2486 * landscape and the top side of the camera sensor is aligned with the 2487 * right edge of the display in natural orientation. So the camera 2488 * orientation is 90. The rotation should be set to 0 (270 + 90). 2489 * 2490 * <p>The reference code is as follows. 2491 * 2492 * <pre> 2493 * public void onOrientationChanged(int orientation) { 2494 * if (orientation == ORIENTATION_UNKNOWN) return; 2495 * android.hardware.Camera.CameraInfo info = 2496 * new android.hardware.Camera.CameraInfo(); 2497 * android.hardware.Camera.getCameraInfo(cameraId, info); 2498 * orientation = (orientation + 45) / 90 * 90; 2499 * int rotation = 0; 2500 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2501 * rotation = (info.orientation - orientation + 360) % 360; 2502 * } else { // back-facing camera 2503 * rotation = (info.orientation + orientation) % 360; 2504 * } 2505 * mParameters.setRotation(rotation); 2506 * } 2507 * </pre> 2508 * 2509 * @param rotation The rotation angle in degrees relative to the 2510 * orientation of the camera. Rotation can only be 0, 2511 * 90, 180 or 270. 2512 * @throws IllegalArgumentException if rotation value is invalid. 2513 * @see android.view.OrientationEventListener 2514 * @see #getCameraInfo(int, CameraInfo) 2515 */ 2516 public void setRotation(int rotation) { 2517 if (rotation == 0 || rotation == 90 || rotation == 180 2518 || rotation == 270) { 2519 set(KEY_ROTATION, Integer.toString(rotation)); 2520 } else { 2521 throw new IllegalArgumentException( 2522 "Invalid rotation=" + rotation); 2523 } 2524 } 2525 2526 /** 2527 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2528 * header. 2529 * 2530 * @param latitude GPS latitude coordinate. 2531 */ 2532 public void setGpsLatitude(double latitude) { 2533 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2534 } 2535 2536 /** 2537 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2538 * header. 2539 * 2540 * @param longitude GPS longitude coordinate. 2541 */ 2542 public void setGpsLongitude(double longitude) { 2543 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2544 } 2545 2546 /** 2547 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2548 * 2549 * @param altitude GPS altitude in meters. 2550 */ 2551 public void setGpsAltitude(double altitude) { 2552 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2553 } 2554 2555 /** 2556 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2557 * 2558 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2559 * 1970). 2560 */ 2561 public void setGpsTimestamp(long timestamp) { 2562 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2563 } 2564 2565 /** 2566 * Sets GPS processing method. It will store up to 32 characters 2567 * in JPEG EXIF header. 2568 * 2569 * @param processing_method The processing method to get this location. 2570 */ 2571 public void setGpsProcessingMethod(String processing_method) { 2572 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2573 } 2574 2575 /** 2576 * Removes GPS latitude, longitude, altitude, and timestamp from the 2577 * parameters. 2578 */ 2579 public void removeGpsData() { 2580 remove(KEY_GPS_LATITUDE); 2581 remove(KEY_GPS_LONGITUDE); 2582 remove(KEY_GPS_ALTITUDE); 2583 remove(KEY_GPS_TIMESTAMP); 2584 remove(KEY_GPS_PROCESSING_METHOD); 2585 } 2586 2587 /** 2588 * Gets the current white balance setting. 2589 * 2590 * @return current white balance. null if white balance setting is not 2591 * supported. 2592 * @see #WHITE_BALANCE_AUTO 2593 * @see #WHITE_BALANCE_INCANDESCENT 2594 * @see #WHITE_BALANCE_FLUORESCENT 2595 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2596 * @see #WHITE_BALANCE_DAYLIGHT 2597 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2598 * @see #WHITE_BALANCE_TWILIGHT 2599 * @see #WHITE_BALANCE_SHADE 2600 * 2601 */ 2602 public String getWhiteBalance() { 2603 return get(KEY_WHITE_BALANCE); 2604 } 2605 2606 /** 2607 * Sets the white balance. Changing the setting will release the 2608 * auto-white balance lock. It is recommended not to change white 2609 * balance and AWB lock at the same time. 2610 * 2611 * @param value new white balance. 2612 * @see #getWhiteBalance() 2613 * @see #setAutoWhiteBalanceLock(boolean) 2614 */ 2615 public void setWhiteBalance(String value) { 2616 String oldValue = get(KEY_WHITE_BALANCE); 2617 if (same(value, oldValue)) return; 2618 set(KEY_WHITE_BALANCE, value); 2619 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 2620 } 2621 2622 /** 2623 * Gets the supported white balance. 2624 * 2625 * @return a list of supported white balance. null if white balance 2626 * setting is not supported. 2627 * @see #getWhiteBalance() 2628 */ 2629 public List<String> getSupportedWhiteBalance() { 2630 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2631 return split(str); 2632 } 2633 2634 /** 2635 * Gets the current color effect setting. 2636 * 2637 * @return current color effect. null if color effect 2638 * setting is not supported. 2639 * @see #EFFECT_NONE 2640 * @see #EFFECT_MONO 2641 * @see #EFFECT_NEGATIVE 2642 * @see #EFFECT_SOLARIZE 2643 * @see #EFFECT_SEPIA 2644 * @see #EFFECT_POSTERIZE 2645 * @see #EFFECT_WHITEBOARD 2646 * @see #EFFECT_BLACKBOARD 2647 * @see #EFFECT_AQUA 2648 */ 2649 public String getColorEffect() { 2650 return get(KEY_EFFECT); 2651 } 2652 2653 /** 2654 * Sets the current color effect setting. 2655 * 2656 * @param value new color effect. 2657 * @see #getColorEffect() 2658 */ 2659 public void setColorEffect(String value) { 2660 set(KEY_EFFECT, value); 2661 } 2662 2663 /** 2664 * Gets the supported color effects. 2665 * 2666 * @return a list of supported color effects. null if color effect 2667 * setting is not supported. 2668 * @see #getColorEffect() 2669 */ 2670 public List<String> getSupportedColorEffects() { 2671 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2672 return split(str); 2673 } 2674 2675 2676 /** 2677 * Gets the current antibanding setting. 2678 * 2679 * @return current antibanding. null if antibanding setting is not 2680 * supported. 2681 * @see #ANTIBANDING_AUTO 2682 * @see #ANTIBANDING_50HZ 2683 * @see #ANTIBANDING_60HZ 2684 * @see #ANTIBANDING_OFF 2685 */ 2686 public String getAntibanding() { 2687 return get(KEY_ANTIBANDING); 2688 } 2689 2690 /** 2691 * Sets the antibanding. 2692 * 2693 * @param antibanding new antibanding value. 2694 * @see #getAntibanding() 2695 */ 2696 public void setAntibanding(String antibanding) { 2697 set(KEY_ANTIBANDING, antibanding); 2698 } 2699 2700 /** 2701 * Gets the supported antibanding values. 2702 * 2703 * @return a list of supported antibanding values. null if antibanding 2704 * setting is not supported. 2705 * @see #getAntibanding() 2706 */ 2707 public List<String> getSupportedAntibanding() { 2708 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2709 return split(str); 2710 } 2711 2712 /** 2713 * Gets the current scene mode setting. 2714 * 2715 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2716 * setting is not supported. 2717 * @see #SCENE_MODE_AUTO 2718 * @see #SCENE_MODE_ACTION 2719 * @see #SCENE_MODE_PORTRAIT 2720 * @see #SCENE_MODE_LANDSCAPE 2721 * @see #SCENE_MODE_NIGHT 2722 * @see #SCENE_MODE_NIGHT_PORTRAIT 2723 * @see #SCENE_MODE_THEATRE 2724 * @see #SCENE_MODE_BEACH 2725 * @see #SCENE_MODE_SNOW 2726 * @see #SCENE_MODE_SUNSET 2727 * @see #SCENE_MODE_STEADYPHOTO 2728 * @see #SCENE_MODE_FIREWORKS 2729 * @see #SCENE_MODE_SPORTS 2730 * @see #SCENE_MODE_PARTY 2731 * @see #SCENE_MODE_CANDLELIGHT 2732 */ 2733 public String getSceneMode() { 2734 return get(KEY_SCENE_MODE); 2735 } 2736 2737 /** 2738 * Sets the scene mode. Changing scene mode may override other 2739 * parameters (such as flash mode, focus mode, white balance). For 2740 * example, suppose originally flash mode is on and supported flash 2741 * modes are on/off. In night scene mode, both flash mode and supported 2742 * flash mode may be changed to off. After setting scene mode, 2743 * applications should call getParameters to know if some parameters are 2744 * changed. 2745 * 2746 * @param value scene mode. 2747 * @see #getSceneMode() 2748 */ 2749 public void setSceneMode(String value) { 2750 set(KEY_SCENE_MODE, value); 2751 } 2752 2753 /** 2754 * Gets the supported scene modes. 2755 * 2756 * @return a list of supported scene modes. null if scene mode setting 2757 * is not supported. 2758 * @see #getSceneMode() 2759 */ 2760 public List<String> getSupportedSceneModes() { 2761 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2762 return split(str); 2763 } 2764 2765 /** 2766 * Gets the current flash mode setting. 2767 * 2768 * @return current flash mode. null if flash mode setting is not 2769 * supported. 2770 * @see #FLASH_MODE_OFF 2771 * @see #FLASH_MODE_AUTO 2772 * @see #FLASH_MODE_ON 2773 * @see #FLASH_MODE_RED_EYE 2774 * @see #FLASH_MODE_TORCH 2775 */ 2776 public String getFlashMode() { 2777 return get(KEY_FLASH_MODE); 2778 } 2779 2780 /** 2781 * Sets the flash mode. 2782 * 2783 * @param value flash mode. 2784 * @see #getFlashMode() 2785 */ 2786 public void setFlashMode(String value) { 2787 set(KEY_FLASH_MODE, value); 2788 } 2789 2790 /** 2791 * Gets the supported flash modes. 2792 * 2793 * @return a list of supported flash modes. null if flash mode setting 2794 * is not supported. 2795 * @see #getFlashMode() 2796 */ 2797 public List<String> getSupportedFlashModes() { 2798 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2799 return split(str); 2800 } 2801 2802 /** 2803 * Gets the current focus mode setting. 2804 * 2805 * @return current focus mode. This method will always return a non-null 2806 * value. Applications should call {@link 2807 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2808 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2809 * @see #FOCUS_MODE_AUTO 2810 * @see #FOCUS_MODE_INFINITY 2811 * @see #FOCUS_MODE_MACRO 2812 * @see #FOCUS_MODE_FIXED 2813 * @see #FOCUS_MODE_EDOF 2814 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2815 */ 2816 public String getFocusMode() { 2817 return get(KEY_FOCUS_MODE); 2818 } 2819 2820 /** 2821 * Sets the focus mode. 2822 * 2823 * @param value focus mode. 2824 * @see #getFocusMode() 2825 */ 2826 public void setFocusMode(String value) { 2827 set(KEY_FOCUS_MODE, value); 2828 } 2829 2830 /** 2831 * Gets the supported focus modes. 2832 * 2833 * @return a list of supported focus modes. This method will always 2834 * return a list with at least one element. 2835 * @see #getFocusMode() 2836 */ 2837 public List<String> getSupportedFocusModes() { 2838 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2839 return split(str); 2840 } 2841 2842 /** 2843 * Gets the focal length (in millimeter) of the camera. 2844 * 2845 * @return the focal length. This method will always return a valid 2846 * value. 2847 */ 2848 public float getFocalLength() { 2849 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2850 } 2851 2852 /** 2853 * Gets the horizontal angle of view in degrees. 2854 * 2855 * @return horizontal angle of view. This method will always return a 2856 * valid value. 2857 */ 2858 public float getHorizontalViewAngle() { 2859 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2860 } 2861 2862 /** 2863 * Gets the vertical angle of view in degrees. 2864 * 2865 * @return vertical angle of view. This method will always return a 2866 * valid value. 2867 */ 2868 public float getVerticalViewAngle() { 2869 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2870 } 2871 2872 /** 2873 * Gets the current exposure compensation index. 2874 * 2875 * @return current exposure compensation index. The range is {@link 2876 * #getMinExposureCompensation} to {@link 2877 * #getMaxExposureCompensation}. 0 means exposure is not 2878 * adjusted. 2879 */ 2880 public int getExposureCompensation() { 2881 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2882 } 2883 2884 /** 2885 * Sets the exposure compensation index. 2886 * 2887 * @param value exposure compensation index. The valid value range is 2888 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2889 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2890 * not adjusted. Application should call 2891 * getMinExposureCompensation and getMaxExposureCompensation to 2892 * know if exposure compensation is supported. 2893 */ 2894 public void setExposureCompensation(int value) { 2895 set(KEY_EXPOSURE_COMPENSATION, value); 2896 } 2897 2898 /** 2899 * Gets the maximum exposure compensation index. 2900 * 2901 * @return maximum exposure compensation index (>=0). If both this 2902 * method and {@link #getMinExposureCompensation} return 0, 2903 * exposure compensation is not supported. 2904 */ 2905 public int getMaxExposureCompensation() { 2906 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2907 } 2908 2909 /** 2910 * Gets the minimum exposure compensation index. 2911 * 2912 * @return minimum exposure compensation index (<=0). If both this 2913 * method and {@link #getMaxExposureCompensation} return 0, 2914 * exposure compensation is not supported. 2915 */ 2916 public int getMinExposureCompensation() { 2917 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2918 } 2919 2920 /** 2921 * Gets the exposure compensation step. 2922 * 2923 * @return exposure compensation step. Applications can get EV by 2924 * multiplying the exposure compensation index and step. Ex: if 2925 * exposure compensation index is -6 and step is 0.333333333, EV 2926 * is -2. 2927 */ 2928 public float getExposureCompensationStep() { 2929 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2930 } 2931 2932 /** 2933 * <p>Sets the auto-exposure lock state. Applications should check 2934 * {@link #isAutoExposureLockSupported} before using this method.</p> 2935 * 2936 * <p>If set to true, the camera auto-exposure routine will immediately 2937 * pause until the lock is set to false. Exposure compensation settings 2938 * changes will still take effect while auto-exposure is locked.</p> 2939 * 2940 * <p>If auto-exposure is already locked, setting this to true again has 2941 * no effect (the driver will not recalculate exposure values).</p> 2942 * 2943 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2944 * image capture with {@link #takePicture(Camera.ShutterCallback, 2945 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 2946 * lock.</p> 2947 * 2948 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 2949 * lock can be used to capture an exposure-bracketed burst of images, 2950 * for example.</p> 2951 * 2952 * <p>Auto-exposure state, including the lock state, will not be 2953 * maintained after camera {@link #release()} is called. Locking 2954 * auto-exposure after {@link #open()} but before the first call to 2955 * {@link #startPreview()} will not allow the auto-exposure routine to 2956 * run at all, and may result in severely over- or under-exposed 2957 * images.</p> 2958 * 2959 * @param toggle new state of the auto-exposure lock. True means that 2960 * auto-exposure is locked, false means that the auto-exposure 2961 * routine is free to run normally. 2962 * 2963 * @see #getAutoExposureLock() 2964 */ 2965 public void setAutoExposureLock(boolean toggle) { 2966 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 2967 } 2968 2969 /** 2970 * Gets the state of the auto-exposure lock. Applications should check 2971 * {@link #isAutoExposureLockSupported} before using this method. See 2972 * {@link #setAutoExposureLock} for details about the lock. 2973 * 2974 * @return State of the auto-exposure lock. Returns true if 2975 * auto-exposure is currently locked, and false otherwise. 2976 * 2977 * @see #setAutoExposureLock(boolean) 2978 * 2979 */ 2980 public boolean getAutoExposureLock() { 2981 String str = get(KEY_AUTO_EXPOSURE_LOCK); 2982 return TRUE.equals(str); 2983 } 2984 2985 /** 2986 * Returns true if auto-exposure locking is supported. Applications 2987 * should call this before trying to lock auto-exposure. See 2988 * {@link #setAutoExposureLock} for details about the lock. 2989 * 2990 * @return true if auto-exposure lock is supported. 2991 * @see #setAutoExposureLock(boolean) 2992 * 2993 */ 2994 public boolean isAutoExposureLockSupported() { 2995 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 2996 return TRUE.equals(str); 2997 } 2998 2999 /** 3000 * <p>Sets the auto-white balance lock state. Applications should check 3001 * {@link #isAutoWhiteBalanceLockSupported} before using this 3002 * method.</p> 3003 * 3004 * <p>If set to true, the camera auto-white balance routine will 3005 * immediately pause until the lock is set to false.</p> 3006 * 3007 * <p>If auto-white balance is already locked, setting this to true 3008 * again has no effect (the driver will not recalculate white balance 3009 * values).</p> 3010 * 3011 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3012 * image capture with {@link #takePicture(Camera.ShutterCallback, 3013 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3014 * the lock.</p> 3015 * 3016 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3017 * will release the auto-white balance lock if it is set.</p> 3018 * 3019 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3020 * capture an exposure-bracketed burst of images, for example. 3021 * Auto-white balance state, including the lock state, will not be 3022 * maintained after camera {@link #release()} is called. Locking 3023 * auto-white balance after {@link #open()} but before the first call to 3024 * {@link #startPreview()} will not allow the auto-white balance routine 3025 * to run at all, and may result in severely incorrect color in captured 3026 * images.</p> 3027 * 3028 * @param toggle new state of the auto-white balance lock. True means 3029 * that auto-white balance is locked, false means that the 3030 * auto-white balance routine is free to run normally. 3031 * 3032 * @see #getAutoWhiteBalanceLock() 3033 * @see #setWhiteBalance(String) 3034 */ 3035 public void setAutoWhiteBalanceLock(boolean toggle) { 3036 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3037 } 3038 3039 /** 3040 * Gets the state of the auto-white balance lock. Applications should 3041 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3042 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3043 * lock. 3044 * 3045 * @return State of the auto-white balance lock. Returns true if 3046 * auto-white balance is currently locked, and false 3047 * otherwise. 3048 * 3049 * @see #setAutoWhiteBalanceLock(boolean) 3050 * 3051 */ 3052 public boolean getAutoWhiteBalanceLock() { 3053 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3054 return TRUE.equals(str); 3055 } 3056 3057 /** 3058 * Returns true if auto-white balance locking is supported. Applications 3059 * should call this before trying to lock auto-white balance. See 3060 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3061 * 3062 * @return true if auto-white balance lock is supported. 3063 * @see #setAutoWhiteBalanceLock(boolean) 3064 * 3065 */ 3066 public boolean isAutoWhiteBalanceLockSupported() { 3067 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3068 return TRUE.equals(str); 3069 } 3070 3071 /** 3072 * Gets current zoom value. This also works when smooth zoom is in 3073 * progress. Applications should check {@link #isZoomSupported} before 3074 * using this method. 3075 * 3076 * @return the current zoom value. The range is 0 to {@link 3077 * #getMaxZoom}. 0 means the camera is not zoomed. 3078 */ 3079 public int getZoom() { 3080 return getInt(KEY_ZOOM, 0); 3081 } 3082 3083 /** 3084 * Sets current zoom value. If the camera is zoomed (value > 0), the 3085 * actual picture size may be smaller than picture size setting. 3086 * Applications can check the actual picture size after picture is 3087 * returned from {@link PictureCallback}. The preview size remains the 3088 * same in zoom. Applications should check {@link #isZoomSupported} 3089 * before using this method. 3090 * 3091 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3092 */ 3093 public void setZoom(int value) { 3094 set(KEY_ZOOM, value); 3095 } 3096 3097 /** 3098 * Returns true if zoom is supported. Applications should call this 3099 * before using other zoom methods. 3100 * 3101 * @return true if zoom is supported. 3102 */ 3103 public boolean isZoomSupported() { 3104 String str = get(KEY_ZOOM_SUPPORTED); 3105 return TRUE.equals(str); 3106 } 3107 3108 /** 3109 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3110 * value that applications can set to {@link #setZoom(int)}. 3111 * Applications should call {@link #isZoomSupported} before using this 3112 * method. This value may change in different preview size. Applications 3113 * should call this again after setting preview size. 3114 * 3115 * @return the maximum zoom value supported by the camera. 3116 */ 3117 public int getMaxZoom() { 3118 return getInt(KEY_MAX_ZOOM, 0); 3119 } 3120 3121 /** 3122 * Gets the zoom ratios of all zoom values. Applications should check 3123 * {@link #isZoomSupported} before using this method. 3124 * 3125 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3126 * returned as 320. The number of elements is {@link 3127 * #getMaxZoom} + 1. The list is sorted from small to large. The 3128 * first element is always 100. The last element is the zoom 3129 * ratio of the maximum zoom value. 3130 */ 3131 public List<Integer> getZoomRatios() { 3132 return splitInt(get(KEY_ZOOM_RATIOS)); 3133 } 3134 3135 /** 3136 * Returns true if smooth zoom is supported. Applications should call 3137 * this before using other smooth zoom methods. 3138 * 3139 * @return true if smooth zoom is supported. 3140 */ 3141 public boolean isSmoothZoomSupported() { 3142 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3143 return TRUE.equals(str); 3144 } 3145 3146 /** 3147 * <p>Gets the distances from the camera to where an object appears to be 3148 * in focus. The object is sharpest at the optimal focus distance. The 3149 * depth of field is the far focus distance minus near focus distance.</p> 3150 * 3151 * <p>Focus distances may change after calling {@link 3152 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3153 * #startPreview()}. Applications can call {@link #getParameters()} 3154 * and this method anytime to get the latest focus distances. If the 3155 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3156 * from time to time.</p> 3157 * 3158 * <p>This method is intended to estimate the distance between the camera 3159 * and the subject. After autofocus, the subject distance may be within 3160 * near and far focus distance. However, the precision depends on the 3161 * camera hardware, autofocus algorithm, the focus area, and the scene. 3162 * The error can be large and it should be only used as a reference.</p> 3163 * 3164 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3165 * If the focus distance is infinity, the value will be 3166 * {@code Float.POSITIVE_INFINITY}.</p> 3167 * 3168 * @param output focus distances in meters. output must be a float 3169 * array with three elements. Near focus distance, optimal focus 3170 * distance, and far focus distance will be filled in the array. 3171 * @see #FOCUS_DISTANCE_NEAR_INDEX 3172 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3173 * @see #FOCUS_DISTANCE_FAR_INDEX 3174 */ 3175 public void getFocusDistances(float[] output) { 3176 if (output == null || output.length != 3) { 3177 throw new IllegalArgumentException( 3178 "output must be a float array with three elements."); 3179 } 3180 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3181 } 3182 3183 /** 3184 * Gets the maximum number of focus areas supported. This is the maximum 3185 * length of the list in {@link #setFocusAreas(List)} and 3186 * {@link #getFocusAreas()}. 3187 * 3188 * @return the maximum number of focus areas supported by the camera. 3189 * @see #getFocusAreas() 3190 */ 3191 public int getMaxNumFocusAreas() { 3192 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3193 } 3194 3195 /** 3196 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3197 * focus.</p> 3198 * 3199 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3200 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3201 * focus areas first. If the value is 0, focus area is not supported.</p> 3202 * 3203 * <p>Each focus area is a rectangle with specified weight. The direction 3204 * is relative to the sensor orientation, that is, what the sensor sees. 3205 * The direction is not affected by the rotation or mirroring of 3206 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3207 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3208 * (1000, 1000) is the lower right point. The width and height of focus 3209 * areas cannot be 0 or negative.</p> 3210 * 3211 * <p>The weight must range from 1 to 1000. The weight should be 3212 * interpreted as a per-pixel weight - all pixels in the area have the 3213 * specified weight. This means a small area with the same weight as a 3214 * larger area will have less influence on the focusing than the larger 3215 * area. Focus areas can partially overlap and the driver will add the 3216 * weights in the overlap region.</p> 3217 * 3218 * <p>A special case of a {@code null} focus area list means the driver is 3219 * free to select focus targets as it wants. For example, the driver may 3220 * use more signals to select focus areas and change them 3221 * dynamically. Apps can set the focus area list to {@code null} if they 3222 * want the driver to completely control focusing.</p> 3223 * 3224 * <p>Focus areas are relative to the current field of view 3225 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3226 * represents the top of the currently visible camera frame. The focus 3227 * area cannot be set to be outside the current field of view, even 3228 * when using zoom.</p> 3229 * 3230 * <p>Focus area only has effect if the current focus mode is 3231 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3232 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3233 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3234 * 3235 * @return a list of current focus areas 3236 */ 3237 public List<Area> getFocusAreas() { 3238 return splitArea(get(KEY_FOCUS_AREAS)); 3239 } 3240 3241 /** 3242 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3243 * 3244 * @param focusAreas the focus areas 3245 * @see #getFocusAreas() 3246 */ 3247 public void setFocusAreas(List<Area> focusAreas) { 3248 set(KEY_FOCUS_AREAS, focusAreas); 3249 } 3250 3251 /** 3252 * Gets the maximum number of metering areas supported. This is the 3253 * maximum length of the list in {@link #setMeteringAreas(List)} and 3254 * {@link #getMeteringAreas()}. 3255 * 3256 * @return the maximum number of metering areas supported by the camera. 3257 * @see #getMeteringAreas() 3258 */ 3259 public int getMaxNumMeteringAreas() { 3260 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3261 } 3262 3263 /** 3264 * <p>Gets the current metering areas. Camera driver uses these areas to 3265 * decide exposure.</p> 3266 * 3267 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3268 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3269 * metering areas first. If the value is 0, metering area is not 3270 * supported.</p> 3271 * 3272 * <p>Each metering area is a rectangle with specified weight. The 3273 * direction is relative to the sensor orientation, that is, what the 3274 * sensor sees. The direction is not affected by the rotation or 3275 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3276 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3277 * point. (1000, 1000) is the lower right point. The width and height of 3278 * metering areas cannot be 0 or negative.</p> 3279 * 3280 * <p>The weight must range from 1 to 1000, and represents a weight for 3281 * every pixel in the area. This means that a large metering area with 3282 * the same weight as a smaller area will have more effect in the 3283 * metering result. Metering areas can partially overlap and the driver 3284 * will add the weights in the overlap region.</p> 3285 * 3286 * <p>A special case of a {@code null} metering area list means the driver 3287 * is free to meter as it chooses. For example, the driver may use more 3288 * signals to select metering areas and change them dynamically. Apps 3289 * can set the metering area list to {@code null} if they want the 3290 * driver to completely control metering.</p> 3291 * 3292 * <p>Metering areas are relative to the current field of view 3293 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3294 * represents the top of the currently visible camera frame. The 3295 * metering area cannot be set to be outside the current field of view, 3296 * even when using zoom.</p> 3297 * 3298 * <p>No matter what metering areas are, the final exposure are compensated 3299 * by {@link #setExposureCompensation(int)}.</p> 3300 * 3301 * @return a list of current metering areas 3302 */ 3303 public List<Area> getMeteringAreas() { 3304 return splitArea(get(KEY_METERING_AREAS)); 3305 } 3306 3307 /** 3308 * Sets metering areas. See {@link #getMeteringAreas()} for 3309 * documentation. 3310 * 3311 * @param meteringAreas the metering areas 3312 * @see #getMeteringAreas() 3313 */ 3314 public void setMeteringAreas(List<Area> meteringAreas) { 3315 set(KEY_METERING_AREAS, meteringAreas); 3316 } 3317 3318 /** 3319 * Gets the maximum number of detected faces supported. This is the 3320 * maximum length of the list returned from {@link FaceDetectionListener}. 3321 * If the return value is 0, face detection of the specified type is not 3322 * supported. 3323 * 3324 * @return the maximum number of detected face supported by the camera. 3325 * @see #startFaceDetection() 3326 */ 3327 public int getMaxNumDetectedFaces() { 3328 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3329 } 3330 3331 /** 3332 * Sets recording mode hint. This tells the camera that the intent of 3333 * the application is to record videos {@link 3334 * android.media.MediaRecorder#start()}, not to take still pictures 3335 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3336 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3337 * allow MediaRecorder.start() to start faster or with fewer glitches on 3338 * output. This should be called before starting preview for the best 3339 * result, but can be changed while the preview is active. The default 3340 * value is false. 3341 * 3342 * The app can still call takePicture() when the hint is true or call 3343 * MediaRecorder.start() when the hint is false. But the performance may 3344 * be worse. 3345 * 3346 * @param hint true if the apps intend to record videos using 3347 * {@link android.media.MediaRecorder}. 3348 */ 3349 public void setRecordingHint(boolean hint) { 3350 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3351 } 3352 3353 /** 3354 * Returns true if video snapshot is supported. That is, applications 3355 * can call {@link #takePicture(Camera.ShutterCallback, 3356 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} 3357 * during recording. Applications do not need to call {@link 3358 * #startPreview()} after taking a picture. The preview will be still 3359 * active. Other than that, taking a picture during recording is 3360 * identical to taking a picture normally. All settings and methods 3361 * related to takePicture work identically. Ex: {@link 3362 * #getPictureSize()}, {@link #getSupportedPictureSizes()}, {@link 3363 * #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 3364 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and {@link 3365 * #FLASH_MODE_ON} also still work, but the video will record the flash. 3366 * 3367 * Applications can set shutter callback as null to avoid the shutter 3368 * sound. It is also recommended to set raw picture and post view 3369 * callbacks to null to avoid the interrupt of preview display. 3370 * 3371 * Field-of-view of the recorded video may be different from that of the 3372 * captured pictures. 3373 * 3374 * @return true if video snapshot is supported. 3375 */ 3376 public boolean isVideoSnapshotSupported() { 3377 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 3378 return TRUE.equals(str); 3379 } 3380 3381 /** 3382 * <p>Enables and disables video stabilization. Use 3383 * {@link #isVideoStabilizationSupported} to determine if calling this 3384 * method is valid.</p> 3385 * 3386 * <p>Video stabilization reduces the shaking due to the motion of the 3387 * camera in both the preview stream and in recorded videos, including 3388 * data received from the preview callback. It does not reduce motion 3389 * blur in images captured with 3390 * {@link Camera#takePicture takePicture}.</p> 3391 * 3392 * <p>Video stabilization can be enabled and disabled while preview or 3393 * recording is active, but toggling it may cause a jump in the video 3394 * stream that may be undesirable in a recorded video.</p> 3395 * 3396 * @param toggle Set to true to enable video stabilization, and false to 3397 * disable video stabilization. 3398 * @see #isVideoStabilizationSupported() 3399 * @see #getVideoStabilization() 3400 */ 3401 public void setVideoStabilization(boolean toggle) { 3402 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 3403 } 3404 3405 /** 3406 * Get the current state of video stabilization. See 3407 * {@link #setVideoStabilization} for details of video stabilization. 3408 * 3409 * @return true if video stabilization is enabled 3410 * @see #isVideoStabilizationSupported() 3411 * @see #setVideoStabilization(boolean) 3412 */ 3413 public boolean getVideoStabilization() { 3414 String str = get(KEY_VIDEO_STABILIZATION); 3415 return TRUE.equals(str); 3416 } 3417 3418 /** 3419 * Returns true if video stabilization is supported. See 3420 * {@link #setVideoStabilization} for details of video stabilization. 3421 * 3422 * @return true if video stabilization is supported 3423 * @see #setVideoStabilization(boolean) 3424 * @see #getVideoStabilization() 3425 */ 3426 public boolean isVideoStabilizationSupported() { 3427 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 3428 return TRUE.equals(str); 3429 } 3430 3431 // Splits a comma delimited string to an ArrayList of String. 3432 // Return null if the passing string is null or the size is 0. 3433 private ArrayList<String> split(String str) { 3434 if (str == null) return null; 3435 3436 // Use StringTokenizer because it is faster than split. 3437 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3438 ArrayList<String> substrings = new ArrayList<String>(); 3439 while (tokenizer.hasMoreElements()) { 3440 substrings.add(tokenizer.nextToken()); 3441 } 3442 return substrings; 3443 } 3444 3445 // Splits a comma delimited string to an ArrayList of Integer. 3446 // Return null if the passing string is null or the size is 0. 3447 private ArrayList<Integer> splitInt(String str) { 3448 if (str == null) return null; 3449 3450 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3451 ArrayList<Integer> substrings = new ArrayList<Integer>(); 3452 while (tokenizer.hasMoreElements()) { 3453 String token = tokenizer.nextToken(); 3454 substrings.add(Integer.parseInt(token)); 3455 } 3456 if (substrings.size() == 0) return null; 3457 return substrings; 3458 } 3459 3460 private void splitInt(String str, int[] output) { 3461 if (str == null) return; 3462 3463 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3464 int index = 0; 3465 while (tokenizer.hasMoreElements()) { 3466 String token = tokenizer.nextToken(); 3467 output[index++] = Integer.parseInt(token); 3468 } 3469 } 3470 3471 // Splits a comma delimited string to an ArrayList of Float. 3472 private void splitFloat(String str, float[] output) { 3473 if (str == null) return; 3474 3475 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3476 int index = 0; 3477 while (tokenizer.hasMoreElements()) { 3478 String token = tokenizer.nextToken(); 3479 output[index++] = Float.parseFloat(token); 3480 } 3481 } 3482 3483 // Returns the value of a float parameter. 3484 private float getFloat(String key, float defaultValue) { 3485 try { 3486 return Float.parseFloat(mMap.get(key)); 3487 } catch (NumberFormatException ex) { 3488 return defaultValue; 3489 } 3490 } 3491 3492 // Returns the value of a integer parameter. 3493 private int getInt(String key, int defaultValue) { 3494 try { 3495 return Integer.parseInt(mMap.get(key)); 3496 } catch (NumberFormatException ex) { 3497 return defaultValue; 3498 } 3499 } 3500 3501 // Splits a comma delimited string to an ArrayList of Size. 3502 // Return null if the passing string is null or the size is 0. 3503 private ArrayList<Size> splitSize(String str) { 3504 if (str == null) return null; 3505 3506 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3507 ArrayList<Size> sizeList = new ArrayList<Size>(); 3508 while (tokenizer.hasMoreElements()) { 3509 Size size = strToSize(tokenizer.nextToken()); 3510 if (size != null) sizeList.add(size); 3511 } 3512 if (sizeList.size() == 0) return null; 3513 return sizeList; 3514 } 3515 3516 // Parses a string (ex: "480x320") to Size object. 3517 // Return null if the passing string is null. 3518 private Size strToSize(String str) { 3519 if (str == null) return null; 3520 3521 int pos = str.indexOf('x'); 3522 if (pos != -1) { 3523 String width = str.substring(0, pos); 3524 String height = str.substring(pos + 1); 3525 return new Size(Integer.parseInt(width), 3526 Integer.parseInt(height)); 3527 } 3528 Log.e(TAG, "Invalid size parameter string=" + str); 3529 return null; 3530 } 3531 3532 // Splits a comma delimited string to an ArrayList of int array. 3533 // Example string: "(10000,26623),(10000,30000)". Return null if the 3534 // passing string is null or the size is 0. 3535 private ArrayList<int[]> splitRange(String str) { 3536 if (str == null || str.charAt(0) != '(' 3537 || str.charAt(str.length() - 1) != ')') { 3538 Log.e(TAG, "Invalid range list string=" + str); 3539 return null; 3540 } 3541 3542 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3543 int endIndex, fromIndex = 1; 3544 do { 3545 int[] range = new int[2]; 3546 endIndex = str.indexOf("),(", fromIndex); 3547 if (endIndex == -1) endIndex = str.length() - 1; 3548 splitInt(str.substring(fromIndex, endIndex), range); 3549 rangeList.add(range); 3550 fromIndex = endIndex + 3; 3551 } while (endIndex != str.length() - 1); 3552 3553 if (rangeList.size() == 0) return null; 3554 return rangeList; 3555 } 3556 3557 // Splits a comma delimited string to an ArrayList of Area objects. 3558 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3559 // the passing string is null or the size is 0 or (0,0,0,0,0). 3560 private ArrayList<Area> splitArea(String str) { 3561 if (str == null || str.charAt(0) != '(' 3562 || str.charAt(str.length() - 1) != ')') { 3563 Log.e(TAG, "Invalid area string=" + str); 3564 return null; 3565 } 3566 3567 ArrayList<Area> result = new ArrayList<Area>(); 3568 int endIndex, fromIndex = 1; 3569 int[] array = new int[5]; 3570 do { 3571 endIndex = str.indexOf("),(", fromIndex); 3572 if (endIndex == -1) endIndex = str.length() - 1; 3573 splitInt(str.substring(fromIndex, endIndex), array); 3574 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3575 result.add(new Area(rect, array[4])); 3576 fromIndex = endIndex + 3; 3577 } while (endIndex != str.length() - 1); 3578 3579 if (result.size() == 0) return null; 3580 3581 if (result.size() == 1) { 3582 Area area = result.get(0); 3583 Rect rect = area.rect; 3584 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3585 && rect.bottom == 0 && area.weight == 0) { 3586 return null; 3587 } 3588 } 3589 3590 return result; 3591 } 3592 3593 private boolean same(String s1, String s2) { 3594 if (s1 == null && s2 == null) return true; 3595 if (s1 != null && s1.equals(s2)) return true; 3596 return false; 3597 } 3598 }; 3599 3600 /* 3601 * At any time, there should be at most one pending auto focus completion 3602 * message, but we simply remove all pending AF completion messages in 3603 * the looper's queue. 3604 */ 3605 private void removePendingAFCompletionMessages() { 3606 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 3607 } 3608} 3609