1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.hardware; 18 19import android.app.ActivityThread; 20import android.annotation.SdkConstant; 21import android.annotation.SdkConstant.SdkConstantType; 22import android.content.Context; 23import android.graphics.ImageFormat; 24import android.graphics.Point; 25import android.graphics.Rect; 26import android.graphics.SurfaceTexture; 27import android.media.IAudioService; 28import android.os.Handler; 29import android.os.IBinder; 30import android.os.Looper; 31import android.os.Message; 32import android.os.RemoteException; 33import android.os.ServiceManager; 34import android.renderscript.Allocation; 35import android.renderscript.Element; 36import android.renderscript.RenderScript; 37import android.renderscript.RSIllegalArgumentException; 38import android.renderscript.Type; 39import android.util.Log; 40import android.text.TextUtils; 41import android.view.Surface; 42import android.view.SurfaceHolder; 43 44import java.io.IOException; 45import java.lang.ref.WeakReference; 46import java.util.ArrayList; 47import java.util.HashMap; 48import java.util.List; 49import java.util.concurrent.locks.ReentrantLock; 50 51/** 52 * The Camera class is used to set image capture settings, start/stop preview, 53 * snap pictures, and retrieve frames for encoding for video. This class is a 54 * client for the Camera service, which manages the actual camera hardware. 55 * 56 * <p>To access the device camera, you must declare the 57 * {@link android.Manifest.permission#CAMERA} permission in your Android 58 * Manifest. Also be sure to include the 59 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 60 * manifest element to declare camera features used by your application. 61 * For example, if you use the camera and auto-focus feature, your Manifest 62 * should include the following:</p> 63 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 64 * <uses-feature android:name="android.hardware.camera" /> 65 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 66 * 67 * <p>To take pictures with this class, use the following steps:</p> 68 * 69 * <ol> 70 * <li>Obtain an instance of Camera from {@link #open(int)}. 71 * 72 * <li>Get existing (default) settings with {@link #getParameters()}. 73 * 74 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 75 * {@link #setParameters(Camera.Parameters)}. 76 * 77 * <li>If desired, call {@link #setDisplayOrientation(int)}. 78 * 79 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 80 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 81 * will be unable to start the preview. 82 * 83 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 84 * preview surface. Preview must be started before you can take a picture. 85 * 86 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 87 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 88 * capture a photo. Wait for the callbacks to provide the actual image data. 89 * 90 * <li>After taking a picture, preview display will have stopped. To take more 91 * photos, call {@link #startPreview()} again first. 92 * 93 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 94 * 95 * <li><b>Important:</b> Call {@link #release()} to release the camera for 96 * use by other applications. Applications should release the camera 97 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 98 * it in {@link android.app.Activity#onResume()}). 99 * </ol> 100 * 101 * <p>To quickly switch to video recording mode, use these steps:</p> 102 * 103 * <ol> 104 * <li>Obtain and initialize a Camera and start preview as described above. 105 * 106 * <li>Call {@link #unlock()} to allow the media process to access the camera. 107 * 108 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 109 * See {@link android.media.MediaRecorder} information about video recording. 110 * 111 * <li>When finished recording, call {@link #reconnect()} to re-acquire 112 * and re-lock the camera. 113 * 114 * <li>If desired, restart preview and take more photos or videos. 115 * 116 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 117 * </ol> 118 * 119 * <p>This class is not thread-safe, and is meant for use from one event thread. 120 * Most long-running operations (preview, focus, photo capture, etc) happen 121 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 122 * on the event thread {@link #open(int)} was called from. This class's methods 123 * must never be called from multiple threads at once.</p> 124 * 125 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 126 * may have different hardware specifications, such as megapixel ratings and 127 * auto-focus capabilities. In order for your application to be compatible with 128 * more devices, you should not make assumptions about the device camera 129 * specifications.</p> 130 * 131 * <div class="special reference"> 132 * <h3>Developer Guides</h3> 133 * <p>For more information about using cameras, read the 134 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 135 * </div> 136 */ 137public class Camera { 138 private static final String TAG = "Camera"; 139 140 // These match the enums in frameworks/base/include/camera/Camera.h 141 private static final int CAMERA_MSG_ERROR = 0x001; 142 private static final int CAMERA_MSG_SHUTTER = 0x002; 143 private static final int CAMERA_MSG_FOCUS = 0x004; 144 private static final int CAMERA_MSG_ZOOM = 0x008; 145 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 146 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 147 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 148 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 149 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 150 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 151 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 152 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 153 154 private int mNativeContext; // accessed by native methods 155 private EventHandler mEventHandler; 156 private ShutterCallback mShutterCallback; 157 private PictureCallback mRawImageCallback; 158 private PictureCallback mJpegCallback; 159 private PreviewCallback mPreviewCallback; 160 private boolean mUsingPreviewAllocation; 161 private PictureCallback mPostviewCallback; 162 private AutoFocusCallback mAutoFocusCallback; 163 private AutoFocusMoveCallback mAutoFocusMoveCallback; 164 private OnZoomChangeListener mZoomListener; 165 private FaceDetectionListener mFaceListener; 166 private ErrorCallback mErrorCallback; 167 private boolean mOneShot; 168 private boolean mWithBuffer; 169 private boolean mFaceDetectionRunning = false; 170 private Object mAutoFocusCallbackLock = new Object(); 171 172 /** 173 * Broadcast Action: A new picture is taken by the camera, and the entry of 174 * the picture has been added to the media store. 175 * {@link android.content.Intent#getData} is URI of the picture. 176 */ 177 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 178 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 179 180 /** 181 * Broadcast Action: A new video is recorded by the camera, and the entry 182 * of the video has been added to the media store. 183 * {@link android.content.Intent#getData} is URI of the video. 184 */ 185 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 186 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 187 188 /** 189 * Hardware face detection. It does not use much CPU. 190 */ 191 private static final int CAMERA_FACE_DETECTION_HW = 0; 192 193 /** 194 * Software face detection. It uses some CPU. 195 */ 196 private static final int CAMERA_FACE_DETECTION_SW = 1; 197 198 /** 199 * Returns the number of physical cameras available on this device. 200 */ 201 public native static int getNumberOfCameras(); 202 203 /** 204 * Returns the information about a particular camera. 205 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 206 */ 207 public static void getCameraInfo(int cameraId, CameraInfo cameraInfo) { 208 _getCameraInfo(cameraId, cameraInfo); 209 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 210 IAudioService audioService = IAudioService.Stub.asInterface(b); 211 try { 212 if (audioService.isCameraSoundForced()) { 213 // Only set this when sound is forced; otherwise let native code 214 // decide. 215 cameraInfo.canDisableShutterSound = false; 216 } 217 } catch (RemoteException e) { 218 Log.e(TAG, "Audio service is unavailable for queries"); 219 } 220 } 221 private native static void _getCameraInfo(int cameraId, CameraInfo cameraInfo); 222 223 /** 224 * Information about a camera 225 */ 226 public static class CameraInfo { 227 /** 228 * The facing of the camera is opposite to that of the screen. 229 */ 230 public static final int CAMERA_FACING_BACK = 0; 231 232 /** 233 * The facing of the camera is the same as that of the screen. 234 */ 235 public static final int CAMERA_FACING_FRONT = 1; 236 237 /** 238 * The direction that the camera faces. It should be 239 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 240 */ 241 public int facing; 242 243 /** 244 * <p>The orientation of the camera image. The value is the angle that the 245 * camera image needs to be rotated clockwise so it shows correctly on 246 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 247 * 248 * <p>For example, suppose a device has a naturally tall screen. The 249 * back-facing camera sensor is mounted in landscape. You are looking at 250 * the screen. If the top side of the camera sensor is aligned with the 251 * right edge of the screen in natural orientation, the value should be 252 * 90. If the top side of a front-facing camera sensor is aligned with 253 * the right of the screen, the value should be 270.</p> 254 * 255 * @see #setDisplayOrientation(int) 256 * @see Parameters#setRotation(int) 257 * @see Parameters#setPreviewSize(int, int) 258 * @see Parameters#setPictureSize(int, int) 259 * @see Parameters#setJpegThumbnailSize(int, int) 260 */ 261 public int orientation; 262 263 /** 264 * <p>Whether the shutter sound can be disabled.</p> 265 * 266 * <p>On some devices, the camera shutter sound cannot be turned off 267 * through {@link #enableShutterSound enableShutterSound}. This field 268 * can be used to determine whether a call to disable the shutter sound 269 * will succeed.</p> 270 * 271 * <p>If this field is set to true, then a call of 272 * {@code enableShutterSound(false)} will be successful. If set to 273 * false, then that call will fail, and the shutter sound will be played 274 * when {@link Camera#takePicture takePicture} is called.</p> 275 */ 276 public boolean canDisableShutterSound; 277 }; 278 279 /** 280 * Creates a new Camera object to access a particular hardware camera. If 281 * the same camera is opened by other applications, this will throw a 282 * RuntimeException. 283 * 284 * <p>You must call {@link #release()} when you are done using the camera, 285 * otherwise it will remain locked and be unavailable to other applications. 286 * 287 * <p>Your application should only have one Camera object active at a time 288 * for a particular hardware camera. 289 * 290 * <p>Callbacks from other methods are delivered to the event loop of the 291 * thread which called open(). If this thread has no event loop, then 292 * callbacks are delivered to the main application event loop. If there 293 * is no main application event loop, callbacks are not delivered. 294 * 295 * <p class="caution"><b>Caution:</b> On some devices, this method may 296 * take a long time to complete. It is best to call this method from a 297 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 298 * blocking the main application UI thread. 299 * 300 * @param cameraId the hardware camera to access, between 0 and 301 * {@link #getNumberOfCameras()}-1. 302 * @return a new Camera object, connected, locked and ready for use. 303 * @throws RuntimeException if opening the camera fails (for example, if the 304 * camera is in use by another process or device policy manager has 305 * disabled the camera). 306 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 307 */ 308 public static Camera open(int cameraId) { 309 return new Camera(cameraId); 310 } 311 312 /** 313 * Creates a new Camera object to access the first back-facing camera on the 314 * device. If the device does not have a back-facing camera, this returns 315 * null. 316 * @see #open(int) 317 */ 318 public static Camera open() { 319 int numberOfCameras = getNumberOfCameras(); 320 CameraInfo cameraInfo = new CameraInfo(); 321 for (int i = 0; i < numberOfCameras; i++) { 322 getCameraInfo(i, cameraInfo); 323 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 324 return new Camera(i); 325 } 326 } 327 return null; 328 } 329 330 Camera(int cameraId) { 331 mShutterCallback = null; 332 mRawImageCallback = null; 333 mJpegCallback = null; 334 mPreviewCallback = null; 335 mPostviewCallback = null; 336 mUsingPreviewAllocation = false; 337 mZoomListener = null; 338 339 Looper looper; 340 if ((looper = Looper.myLooper()) != null) { 341 mEventHandler = new EventHandler(this, looper); 342 } else if ((looper = Looper.getMainLooper()) != null) { 343 mEventHandler = new EventHandler(this, looper); 344 } else { 345 mEventHandler = null; 346 } 347 348 String packageName = ActivityThread.currentPackageName(); 349 350 native_setup(new WeakReference<Camera>(this), cameraId, packageName); 351 } 352 353 /** 354 * An empty Camera for testing purpose. 355 */ 356 Camera() { 357 } 358 359 protected void finalize() { 360 release(); 361 } 362 363 private native final void native_setup(Object camera_this, int cameraId, 364 String packageName); 365 366 private native final void native_release(); 367 368 369 /** 370 * Disconnects and releases the Camera object resources. 371 * 372 * <p>You must call this as soon as you're done with the Camera object.</p> 373 */ 374 public final void release() { 375 native_release(); 376 mFaceDetectionRunning = false; 377 } 378 379 /** 380 * Unlocks the camera to allow another process to access it. 381 * Normally, the camera is locked to the process with an active Camera 382 * object until {@link #release()} is called. To allow rapid handoff 383 * between processes, you can call this method to release the camera 384 * temporarily for another process to use; once the other process is done 385 * you can call {@link #reconnect()} to reclaim the camera. 386 * 387 * <p>This must be done before calling 388 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 389 * called after recording starts. 390 * 391 * <p>If you are not recording video, you probably do not need this method. 392 * 393 * @throws RuntimeException if the camera cannot be unlocked. 394 */ 395 public native final void unlock(); 396 397 /** 398 * Re-locks the camera to prevent other processes from accessing it. 399 * Camera objects are locked by default unless {@link #unlock()} is 400 * called. Normally {@link #reconnect()} is used instead. 401 * 402 * <p>Since API level 14, camera is automatically locked for applications in 403 * {@link android.media.MediaRecorder#start()}. Applications can use the 404 * camera (ex: zoom) after recording starts. There is no need to call this 405 * after recording starts or stops. 406 * 407 * <p>If you are not recording video, you probably do not need this method. 408 * 409 * @throws RuntimeException if the camera cannot be re-locked (for 410 * example, if the camera is still in use by another process). 411 */ 412 public native final void lock(); 413 414 /** 415 * Reconnects to the camera service after another process used it. 416 * After {@link #unlock()} is called, another process may use the 417 * camera; when the process is done, you must reconnect to the camera, 418 * which will re-acquire the lock and allow you to continue using the 419 * camera. 420 * 421 * <p>Since API level 14, camera is automatically locked for applications in 422 * {@link android.media.MediaRecorder#start()}. Applications can use the 423 * camera (ex: zoom) after recording starts. There is no need to call this 424 * after recording starts or stops. 425 * 426 * <p>If you are not recording video, you probably do not need this method. 427 * 428 * @throws IOException if a connection cannot be re-established (for 429 * example, if the camera is still in use by another process). 430 */ 431 public native final void reconnect() throws IOException; 432 433 /** 434 * Sets the {@link Surface} to be used for live preview. 435 * Either a surface or surface texture is necessary for preview, and 436 * preview is necessary to take pictures. The same surface can be re-set 437 * without harm. Setting a preview surface will un-set any preview surface 438 * texture that was set via {@link #setPreviewTexture}. 439 * 440 * <p>The {@link SurfaceHolder} must already contain a surface when this 441 * method is called. If you are using {@link android.view.SurfaceView}, 442 * you will need to register a {@link SurfaceHolder.Callback} with 443 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 444 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 445 * calling setPreviewDisplay() or starting preview. 446 * 447 * <p>This method must be called before {@link #startPreview()}. The 448 * one exception is that if the preview surface is not set (or set to null) 449 * before startPreview() is called, then this method may be called once 450 * with a non-null parameter to set the preview surface. (This allows 451 * camera setup and surface creation to happen in parallel, saving time.) 452 * The preview surface may not otherwise change while preview is running. 453 * 454 * @param holder containing the Surface on which to place the preview, 455 * or null to remove the preview surface 456 * @throws IOException if the method fails (for example, if the surface 457 * is unavailable or unsuitable). 458 */ 459 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 460 if (holder != null) { 461 setPreviewDisplay(holder.getSurface()); 462 } else { 463 setPreviewDisplay((Surface)null); 464 } 465 } 466 467 private native final void setPreviewDisplay(Surface surface) throws IOException; 468 469 /** 470 * Sets the {@link SurfaceTexture} to be used for live preview. 471 * Either a surface or surface texture is necessary for preview, and 472 * preview is necessary to take pictures. The same surface texture can be 473 * re-set without harm. Setting a preview surface texture will un-set any 474 * preview surface that was set via {@link #setPreviewDisplay}. 475 * 476 * <p>This method must be called before {@link #startPreview()}. The 477 * one exception is that if the preview surface texture is not set (or set 478 * to null) before startPreview() is called, then this method may be called 479 * once with a non-null parameter to set the preview surface. (This allows 480 * camera setup and surface creation to happen in parallel, saving time.) 481 * The preview surface texture may not otherwise change while preview is 482 * running. 483 * 484 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 485 * SurfaceTexture set as the preview texture have an unspecified zero point, 486 * and cannot be directly compared between different cameras or different 487 * instances of the same camera, or across multiple runs of the same 488 * program. 489 * 490 * <p>If you are using the preview data to create video or still images, 491 * strongly consider using {@link android.media.MediaActionSound} to 492 * properly indicate image capture or recording start/stop to the user.</p> 493 * 494 * @see android.media.MediaActionSound 495 * @see android.graphics.SurfaceTexture 496 * @see android.view.TextureView 497 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 498 * images are to be sent or null to remove the current preview surface 499 * texture 500 * @throws IOException if the method fails (for example, if the surface 501 * texture is unavailable or unsuitable). 502 */ 503 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 504 505 /** 506 * Callback interface used to deliver copies of preview frames as 507 * they are displayed. 508 * 509 * @see #setPreviewCallback(Camera.PreviewCallback) 510 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 511 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 512 * @see #startPreview() 513 */ 514 public interface PreviewCallback 515 { 516 /** 517 * Called as preview frames are displayed. This callback is invoked 518 * on the event thread {@link #open(int)} was called from. 519 * 520 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, 521 * refer to the equations in {@link Camera.Parameters#setPreviewFormat} 522 * for the arrangement of the pixel data in the preview callback 523 * buffers. 524 * 525 * @param data the contents of the preview frame in the format defined 526 * by {@link android.graphics.ImageFormat}, which can be queried 527 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 528 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 529 * is never called, the default will be the YCbCr_420_SP 530 * (NV21) format. 531 * @param camera the Camera service object. 532 */ 533 void onPreviewFrame(byte[] data, Camera camera); 534 }; 535 536 /** 537 * Starts capturing and drawing preview frames to the screen. 538 * Preview will not actually start until a surface is supplied 539 * with {@link #setPreviewDisplay(SurfaceHolder)} or 540 * {@link #setPreviewTexture(SurfaceTexture)}. 541 * 542 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 543 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 544 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 545 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 546 * will be called when preview data becomes available. 547 */ 548 public native final void startPreview(); 549 550 /** 551 * Stops capturing and drawing preview frames to the surface, and 552 * resets the camera for a future call to {@link #startPreview()}. 553 */ 554 public final void stopPreview() { 555 _stopPreview(); 556 mFaceDetectionRunning = false; 557 558 mShutterCallback = null; 559 mRawImageCallback = null; 560 mPostviewCallback = null; 561 mJpegCallback = null; 562 synchronized (mAutoFocusCallbackLock) { 563 mAutoFocusCallback = null; 564 } 565 mAutoFocusMoveCallback = null; 566 } 567 568 private native final void _stopPreview(); 569 570 /** 571 * Return current preview state. 572 * 573 * FIXME: Unhide before release 574 * @hide 575 */ 576 public native final boolean previewEnabled(); 577 578 /** 579 * <p>Installs a callback to be invoked for every preview frame in addition 580 * to displaying them on the screen. The callback will be repeatedly called 581 * for as long as preview is active. This method can be called at any time, 582 * even while preview is live. Any other preview callbacks are 583 * overridden.</p> 584 * 585 * <p>If you are using the preview data to create video or still images, 586 * strongly consider using {@link android.media.MediaActionSound} to 587 * properly indicate image capture or recording start/stop to the user.</p> 588 * 589 * @param cb a callback object that receives a copy of each preview frame, 590 * or null to stop receiving callbacks. 591 * @see android.media.MediaActionSound 592 */ 593 public final void setPreviewCallback(PreviewCallback cb) { 594 mPreviewCallback = cb; 595 mOneShot = false; 596 mWithBuffer = false; 597 if (cb != null) { 598 mUsingPreviewAllocation = false; 599 } 600 // Always use one-shot mode. We fake camera preview mode by 601 // doing one-shot preview continuously. 602 setHasPreviewCallback(cb != null, false); 603 } 604 605 /** 606 * <p>Installs a callback to be invoked for the next preview frame in 607 * addition to displaying it on the screen. After one invocation, the 608 * callback is cleared. This method can be called any time, even when 609 * preview is live. Any other preview callbacks are overridden.</p> 610 * 611 * <p>If you are using the preview data to create video or still images, 612 * strongly consider using {@link android.media.MediaActionSound} to 613 * properly indicate image capture or recording start/stop to the user.</p> 614 * 615 * @param cb a callback object that receives a copy of the next preview frame, 616 * or null to stop receiving callbacks. 617 * @see android.media.MediaActionSound 618 */ 619 public final void setOneShotPreviewCallback(PreviewCallback cb) { 620 mPreviewCallback = cb; 621 mOneShot = true; 622 mWithBuffer = false; 623 if (cb != null) { 624 mUsingPreviewAllocation = false; 625 } 626 setHasPreviewCallback(cb != null, false); 627 } 628 629 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 630 631 /** 632 * <p>Installs a callback to be invoked for every preview frame, using 633 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 634 * displaying them on the screen. The callback will be repeatedly called 635 * for as long as preview is active and buffers are available. Any other 636 * preview callbacks are overridden.</p> 637 * 638 * <p>The purpose of this method is to improve preview efficiency and frame 639 * rate by allowing preview frame memory reuse. You must call 640 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 641 * calling this method -- or no callbacks will received.</p> 642 * 643 * <p>The buffer queue will be cleared if this method is called with a null 644 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 645 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 646 * called.</p> 647 * 648 * <p>If you are using the preview data to create video or still images, 649 * strongly consider using {@link android.media.MediaActionSound} to 650 * properly indicate image capture or recording start/stop to the user.</p> 651 * 652 * @param cb a callback object that receives a copy of the preview frame, 653 * or null to stop receiving callbacks and clear the buffer queue. 654 * @see #addCallbackBuffer(byte[]) 655 * @see android.media.MediaActionSound 656 */ 657 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 658 mPreviewCallback = cb; 659 mOneShot = false; 660 mWithBuffer = true; 661 if (cb != null) { 662 mUsingPreviewAllocation = false; 663 } 664 setHasPreviewCallback(cb != null, true); 665 } 666 667 /** 668 * Adds a pre-allocated buffer to the preview callback buffer queue. 669 * Applications can add one or more buffers to the queue. When a preview 670 * frame arrives and there is still at least one available buffer, the 671 * buffer will be used and removed from the queue. Then preview callback is 672 * invoked with the buffer. If a frame arrives and there is no buffer left, 673 * the frame is discarded. Applications should add buffers back when they 674 * finish processing the data in them. 675 * 676 * <p>For formats besides YV12, the size of the buffer is determined by 677 * multiplying the preview image width, height, and bytes per pixel. The 678 * width and height can be read from 679 * {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel can be 680 * computed from {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 681 * 8, using the image format from 682 * {@link Camera.Parameters#getPreviewFormat()}. 683 * 684 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, the 685 * size can be calculated using the equations listed in 686 * {@link Camera.Parameters#setPreviewFormat}. 687 * 688 * <p>This method is only necessary when 689 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 690 * {@link #setPreviewCallback(PreviewCallback)} or 691 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 692 * are automatically allocated. When a supplied buffer is too small to 693 * hold the preview frame data, preview callback will return null and 694 * the buffer will be removed from the buffer queue. 695 * 696 * @param callbackBuffer the buffer to add to the queue. The size of the 697 * buffer must match the values described above. 698 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 699 */ 700 public final void addCallbackBuffer(byte[] callbackBuffer) 701 { 702 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 703 } 704 705 /** 706 * Adds a pre-allocated buffer to the raw image callback buffer queue. 707 * Applications can add one or more buffers to the queue. When a raw image 708 * frame arrives and there is still at least one available buffer, the 709 * buffer will be used to hold the raw image data and removed from the 710 * queue. Then raw image callback is invoked with the buffer. If a raw 711 * image frame arrives but there is no buffer left, the frame is 712 * discarded. Applications should add buffers back when they finish 713 * processing the data in them by calling this method again in order 714 * to avoid running out of raw image callback buffers. 715 * 716 * <p>The size of the buffer is determined by multiplying the raw image 717 * width, height, and bytes per pixel. The width and height can be 718 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 719 * can be computed from 720 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 721 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 722 * 723 * <p>This method is only necessary when the PictureCallbck for raw image 724 * is used while calling {@link #takePicture(Camera.ShutterCallback, 725 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 726 * 727 * <p>Please note that by calling this method, the mode for 728 * application-managed callback buffers is triggered. If this method has 729 * never been called, null will be returned by the raw image callback since 730 * there is no image callback buffer available. Furthermore, When a supplied 731 * buffer is too small to hold the raw image data, raw image callback will 732 * return null and the buffer will be removed from the buffer queue. 733 * 734 * @param callbackBuffer the buffer to add to the raw image callback buffer 735 * queue. The size should be width * height * (bits per pixel) / 8. An 736 * null callbackBuffer will be ignored and won't be added to the queue. 737 * 738 * @see #takePicture(Camera.ShutterCallback, 739 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 740 * 741 * {@hide} 742 */ 743 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 744 { 745 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 746 } 747 748 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 749 { 750 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 751 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 752 msgType != CAMERA_MSG_RAW_IMAGE) { 753 throw new IllegalArgumentException( 754 "Unsupported message type: " + msgType); 755 } 756 757 _addCallbackBuffer(callbackBuffer, msgType); 758 } 759 760 private native final void _addCallbackBuffer( 761 byte[] callbackBuffer, int msgType); 762 763 /** 764 * <p>Create a {@link android.renderscript RenderScript} 765 * {@link android.renderscript.Allocation Allocation} to use as a 766 * destination of preview callback frames. Use 767 * {@link #setPreviewCallbackAllocation setPreviewCallbackAllocation} to use 768 * the created Allocation as a destination for camera preview frames.</p> 769 * 770 * <p>The Allocation will be created with a YUV type, and its contents must 771 * be accessed within Renderscript with the {@code rsGetElementAtYuv_*} 772 * accessor methods. Its size will be based on the current 773 * {@link Parameters#getPreviewSize preview size} configured for this 774 * camera.</p> 775 * 776 * @param rs the RenderScript context for this Allocation. 777 * @param usage additional usage flags to set for the Allocation. The usage 778 * flag {@link android.renderscript.Allocation#USAGE_IO_INPUT} will always 779 * be set on the created Allocation, but additional flags may be provided 780 * here. 781 * @return a new YUV-type Allocation with dimensions equal to the current 782 * preview size. 783 * @throws RSIllegalArgumentException if the usage flags are not compatible 784 * with an YUV Allocation. 785 * @see #setPreviewCallbackAllocation 786 * @hide 787 */ 788 public final Allocation createPreviewAllocation(RenderScript rs, int usage) 789 throws RSIllegalArgumentException { 790 Parameters p = getParameters(); 791 Size previewSize = p.getPreviewSize(); 792 Type.Builder yuvBuilder = new Type.Builder(rs, 793 Element.createPixel(rs, 794 Element.DataType.UNSIGNED_8, 795 Element.DataKind.PIXEL_YUV)); 796 // Use YV12 for wide compatibility. Changing this requires also 797 // adjusting camera service's format selection. 798 yuvBuilder.setYuvFormat(ImageFormat.YV12); 799 yuvBuilder.setX(previewSize.width); 800 yuvBuilder.setY(previewSize.height); 801 802 Allocation a = Allocation.createTyped(rs, yuvBuilder.create(), 803 usage | Allocation.USAGE_IO_INPUT); 804 805 return a; 806 } 807 808 /** 809 * <p>Set an {@link android.renderscript.Allocation Allocation} as the 810 * target of preview callback data. Use this method for efficient processing 811 * of camera preview data with RenderScript. The Allocation must be created 812 * with the {@link #createPreviewAllocation createPreviewAllocation } 813 * method.</p> 814 * 815 * <p>Setting a preview allocation will disable any active preview callbacks 816 * set by {@link #setPreviewCallback setPreviewCallback} or 817 * {@link #setPreviewCallbackWithBuffer setPreviewCallbackWithBuffer}, and 818 * vice versa. Using a preview allocation still requires an active standard 819 * preview target to be set, either with 820 * {@link #setPreviewTexture setPreviewTexture} or 821 * {@link #setPreviewDisplay setPreviewDisplay}.</p> 822 * 823 * <p>To be notified when new frames are available to the Allocation, use 824 * {@link android.renderscript.Allocation#setIoInputNotificationHandler Allocation.setIoInputNotificationHandler}. To 825 * update the frame currently accessible from the Allocation to the latest 826 * preview frame, call 827 * {@link android.renderscript.Allocation#ioReceive Allocation.ioReceive}.</p> 828 * 829 * <p>To disable preview into the Allocation, call this method with a 830 * {@code null} parameter.</p> 831 * 832 * <p>Once a preview allocation is set, the preview size set by 833 * {@link Parameters#setPreviewSize setPreviewSize} cannot be changed. If 834 * you wish to change the preview size, first remove the preview allocation 835 * by calling {@code setPreviewCallbackAllocation(null)}, then change the 836 * preview size, create a new preview Allocation with 837 * {@link #createPreviewAllocation createPreviewAllocation}, and set it as 838 * the new preview callback allocation target.</p> 839 * 840 * <p>If you are using the preview data to create video or still images, 841 * strongly consider using {@link android.media.MediaActionSound} to 842 * properly indicate image capture or recording start/stop to the user.</p> 843 * 844 * @param previewAllocation the allocation to use as destination for preview 845 * @throws IOException if configuring the camera to use the Allocation for 846 * preview fails. 847 * @throws IllegalArgumentException if the Allocation's dimensions or other 848 * parameters don't meet the requirements. 849 * @see #createPreviewAllocation 850 * @see #setPreviewCallback 851 * @see #setPreviewCallbackWithBuffer 852 * @hide 853 */ 854 public final void setPreviewCallbackAllocation(Allocation previewAllocation) 855 throws IOException { 856 Surface previewSurface = null; 857 if (previewAllocation != null) { 858 Parameters p = getParameters(); 859 Size previewSize = p.getPreviewSize(); 860 if (previewSize.width != previewAllocation.getType().getX() || 861 previewSize.height != previewAllocation.getType().getY()) { 862 throw new IllegalArgumentException( 863 "Allocation dimensions don't match preview dimensions: " + 864 "Allocation is " + 865 previewAllocation.getType().getX() + 866 ", " + 867 previewAllocation.getType().getY() + 868 ". Preview is " + previewSize.width + ", " + 869 previewSize.height); 870 } 871 if ((previewAllocation.getUsage() & 872 Allocation.USAGE_IO_INPUT) == 0) { 873 throw new IllegalArgumentException( 874 "Allocation usage does not include USAGE_IO_INPUT"); 875 } 876 if (previewAllocation.getType().getElement().getDataKind() != 877 Element.DataKind.PIXEL_YUV) { 878 throw new IllegalArgumentException( 879 "Allocation is not of a YUV type"); 880 } 881 previewSurface = previewAllocation.getSurface(); 882 mUsingPreviewAllocation = true; 883 } else { 884 mUsingPreviewAllocation = false; 885 } 886 setPreviewCallbackSurface(previewSurface); 887 } 888 889 private native final void setPreviewCallbackSurface(Surface s); 890 891 private class EventHandler extends Handler 892 { 893 private Camera mCamera; 894 895 public EventHandler(Camera c, Looper looper) { 896 super(looper); 897 mCamera = c; 898 } 899 900 @Override 901 public void handleMessage(Message msg) { 902 switch(msg.what) { 903 case CAMERA_MSG_SHUTTER: 904 if (mShutterCallback != null) { 905 mShutterCallback.onShutter(); 906 } 907 return; 908 909 case CAMERA_MSG_RAW_IMAGE: 910 if (mRawImageCallback != null) { 911 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 912 } 913 return; 914 915 case CAMERA_MSG_COMPRESSED_IMAGE: 916 if (mJpegCallback != null) { 917 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 918 } 919 return; 920 921 case CAMERA_MSG_PREVIEW_FRAME: 922 PreviewCallback pCb = mPreviewCallback; 923 if (pCb != null) { 924 if (mOneShot) { 925 // Clear the callback variable before the callback 926 // in case the app calls setPreviewCallback from 927 // the callback function 928 mPreviewCallback = null; 929 } else if (!mWithBuffer) { 930 // We're faking the camera preview mode to prevent 931 // the app from being flooded with preview frames. 932 // Set to oneshot mode again. 933 setHasPreviewCallback(true, false); 934 } 935 pCb.onPreviewFrame((byte[])msg.obj, mCamera); 936 } 937 return; 938 939 case CAMERA_MSG_POSTVIEW_FRAME: 940 if (mPostviewCallback != null) { 941 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 942 } 943 return; 944 945 case CAMERA_MSG_FOCUS: 946 AutoFocusCallback cb = null; 947 synchronized (mAutoFocusCallbackLock) { 948 cb = mAutoFocusCallback; 949 } 950 if (cb != null) { 951 boolean success = msg.arg1 == 0 ? false : true; 952 cb.onAutoFocus(success, mCamera); 953 } 954 return; 955 956 case CAMERA_MSG_ZOOM: 957 if (mZoomListener != null) { 958 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 959 } 960 return; 961 962 case CAMERA_MSG_PREVIEW_METADATA: 963 if (mFaceListener != null) { 964 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 965 } 966 return; 967 968 case CAMERA_MSG_ERROR : 969 Log.e(TAG, "Error " + msg.arg1); 970 if (mErrorCallback != null) { 971 mErrorCallback.onError(msg.arg1, mCamera); 972 } 973 return; 974 975 case CAMERA_MSG_FOCUS_MOVE: 976 if (mAutoFocusMoveCallback != null) { 977 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 978 } 979 return; 980 981 default: 982 Log.e(TAG, "Unknown message type " + msg.what); 983 return; 984 } 985 } 986 } 987 988 private static void postEventFromNative(Object camera_ref, 989 int what, int arg1, int arg2, Object obj) 990 { 991 Camera c = (Camera)((WeakReference)camera_ref).get(); 992 if (c == null) 993 return; 994 995 if (c.mEventHandler != null) { 996 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 997 c.mEventHandler.sendMessage(m); 998 } 999 } 1000 1001 /** 1002 * Callback interface used to notify on completion of camera auto focus. 1003 * 1004 * <p>Devices that do not support auto-focus will receive a "fake" 1005 * callback to this interface. If your application needs auto-focus and 1006 * should not be installed on devices <em>without</em> auto-focus, you must 1007 * declare that your app uses the 1008 * {@code android.hardware.camera.autofocus} feature, in the 1009 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1010 * manifest element.</p> 1011 * 1012 * @see #autoFocus(AutoFocusCallback) 1013 */ 1014 public interface AutoFocusCallback 1015 { 1016 /** 1017 * Called when the camera auto focus completes. If the camera 1018 * does not support auto-focus and autoFocus is called, 1019 * onAutoFocus will be called immediately with a fake value of 1020 * <code>success</code> set to <code>true</code>. 1021 * 1022 * The auto-focus routine does not lock auto-exposure and auto-white 1023 * balance after it completes. 1024 * 1025 * @param success true if focus was successful, false if otherwise 1026 * @param camera the Camera service object 1027 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1028 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1029 */ 1030 void onAutoFocus(boolean success, Camera camera); 1031 } 1032 1033 /** 1034 * Starts camera auto-focus and registers a callback function to run when 1035 * the camera is focused. This method is only valid when preview is active 1036 * (between {@link #startPreview()} and before {@link #stopPreview()}). 1037 * 1038 * <p>Callers should check 1039 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 1040 * this method should be called. If the camera does not support auto-focus, 1041 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 1042 * callback will be called immediately. 1043 * 1044 * <p>If your application should not be installed 1045 * on devices without auto-focus, you must declare that your application 1046 * uses auto-focus with the 1047 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1048 * manifest element.</p> 1049 * 1050 * <p>If the current flash mode is not 1051 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 1052 * fired during auto-focus, depending on the driver and camera hardware.<p> 1053 * 1054 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 1055 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 1056 * do not change during and after autofocus. But auto-focus routine may stop 1057 * auto-exposure and auto-white balance transiently during focusing. 1058 * 1059 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 1060 * image capture with {@link #takePicture(Camera.ShutterCallback, 1061 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 1062 * the focus position. Applications must call cancelAutoFocus to reset the 1063 * focus.</p> 1064 * 1065 * <p>If autofocus is successful, consider using 1066 * {@link android.media.MediaActionSound} to properly play back an autofocus 1067 * success sound to the user.</p> 1068 * 1069 * @param cb the callback to run 1070 * @see #cancelAutoFocus() 1071 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1072 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1073 * @see android.media.MediaActionSound 1074 */ 1075 public final void autoFocus(AutoFocusCallback cb) 1076 { 1077 synchronized (mAutoFocusCallbackLock) { 1078 mAutoFocusCallback = cb; 1079 } 1080 native_autoFocus(); 1081 } 1082 private native final void native_autoFocus(); 1083 1084 /** 1085 * Cancels any auto-focus function in progress. 1086 * Whether or not auto-focus is currently in progress, 1087 * this function will return the focus position to the default. 1088 * If the camera does not support auto-focus, this is a no-op. 1089 * 1090 * @see #autoFocus(Camera.AutoFocusCallback) 1091 */ 1092 public final void cancelAutoFocus() 1093 { 1094 synchronized (mAutoFocusCallbackLock) { 1095 mAutoFocusCallback = null; 1096 } 1097 native_cancelAutoFocus(); 1098 // CAMERA_MSG_FOCUS should be removed here because the following 1099 // scenario can happen: 1100 // - An application uses the same thread for autoFocus, cancelAutoFocus 1101 // and looper thread. 1102 // - The application calls autoFocus. 1103 // - HAL sends CAMERA_MSG_FOCUS, which enters the looper message queue. 1104 // Before event handler's handleMessage() is invoked, the application 1105 // calls cancelAutoFocus and autoFocus. 1106 // - The application gets the old CAMERA_MSG_FOCUS and thinks autofocus 1107 // has been completed. But in fact it is not. 1108 // 1109 // As documented in the beginning of the file, apps should not use 1110 // multiple threads to call autoFocus and cancelAutoFocus at the same 1111 // time. It is HAL's responsibility not to send a CAMERA_MSG_FOCUS 1112 // message after native_cancelAutoFocus is called. 1113 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 1114 } 1115 private native final void native_cancelAutoFocus(); 1116 1117 /** 1118 * Callback interface used to notify on auto focus start and stop. 1119 * 1120 * <p>This is only supported in continuous autofocus modes -- {@link 1121 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 1122 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 1123 * autofocus animation based on this.</p> 1124 */ 1125 public interface AutoFocusMoveCallback 1126 { 1127 /** 1128 * Called when the camera auto focus starts or stops. 1129 * 1130 * @param start true if focus starts to move, false if focus stops to move 1131 * @param camera the Camera service object 1132 */ 1133 void onAutoFocusMoving(boolean start, Camera camera); 1134 } 1135 1136 /** 1137 * Sets camera auto-focus move callback. 1138 * 1139 * @param cb the callback to run 1140 */ 1141 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 1142 mAutoFocusMoveCallback = cb; 1143 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 1144 } 1145 1146 private native void enableFocusMoveCallback(int enable); 1147 1148 /** 1149 * Callback interface used to signal the moment of actual image capture. 1150 * 1151 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1152 */ 1153 public interface ShutterCallback 1154 { 1155 /** 1156 * Called as near as possible to the moment when a photo is captured 1157 * from the sensor. This is a good opportunity to play a shutter sound 1158 * or give other feedback of camera operation. This may be some time 1159 * after the photo was triggered, but some time before the actual data 1160 * is available. 1161 */ 1162 void onShutter(); 1163 } 1164 1165 /** 1166 * Callback interface used to supply image data from a photo capture. 1167 * 1168 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1169 */ 1170 public interface PictureCallback { 1171 /** 1172 * Called when image data is available after a picture is taken. 1173 * The format of the data depends on the context of the callback 1174 * and {@link Camera.Parameters} settings. 1175 * 1176 * @param data a byte array of the picture data 1177 * @param camera the Camera service object 1178 */ 1179 void onPictureTaken(byte[] data, Camera camera); 1180 }; 1181 1182 /** 1183 * Equivalent to takePicture(shutter, raw, null, jpeg). 1184 * 1185 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1186 */ 1187 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1188 PictureCallback jpeg) { 1189 takePicture(shutter, raw, null, jpeg); 1190 } 1191 private native final void native_takePicture(int msgType); 1192 1193 /** 1194 * Triggers an asynchronous image capture. The camera service will initiate 1195 * a series of callbacks to the application as the image capture progresses. 1196 * The shutter callback occurs after the image is captured. This can be used 1197 * to trigger a sound to let the user know that image has been captured. The 1198 * raw callback occurs when the raw image data is available (NOTE: the data 1199 * will be null if there is no raw image callback buffer available or the 1200 * raw image callback buffer is not large enough to hold the raw image). 1201 * The postview callback occurs when a scaled, fully processed postview 1202 * image is available (NOTE: not all hardware supports this). The jpeg 1203 * callback occurs when the compressed image is available. If the 1204 * application does not need a particular callback, a null can be passed 1205 * instead of a callback method. 1206 * 1207 * <p>This method is only valid when preview is active (after 1208 * {@link #startPreview()}). Preview will be stopped after the image is 1209 * taken; callers must call {@link #startPreview()} again if they want to 1210 * re-start preview or take more pictures. This should not be called between 1211 * {@link android.media.MediaRecorder#start()} and 1212 * {@link android.media.MediaRecorder#stop()}. 1213 * 1214 * <p>After calling this method, you must not call {@link #startPreview()} 1215 * or take another picture until the JPEG callback has returned. 1216 * 1217 * @param shutter the callback for image capture moment, or null 1218 * @param raw the callback for raw (uncompressed) image data, or null 1219 * @param postview callback with postview image data, may be null 1220 * @param jpeg the callback for JPEG image data, or null 1221 */ 1222 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1223 PictureCallback postview, PictureCallback jpeg) { 1224 mShutterCallback = shutter; 1225 mRawImageCallback = raw; 1226 mPostviewCallback = postview; 1227 mJpegCallback = jpeg; 1228 1229 // If callback is not set, do not send me callbacks. 1230 int msgType = 0; 1231 if (mShutterCallback != null) { 1232 msgType |= CAMERA_MSG_SHUTTER; 1233 } 1234 if (mRawImageCallback != null) { 1235 msgType |= CAMERA_MSG_RAW_IMAGE; 1236 } 1237 if (mPostviewCallback != null) { 1238 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1239 } 1240 if (mJpegCallback != null) { 1241 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1242 } 1243 1244 native_takePicture(msgType); 1245 mFaceDetectionRunning = false; 1246 } 1247 1248 /** 1249 * Zooms to the requested value smoothly. The driver will notify {@link 1250 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1251 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1252 * is called with value 3. The 1253 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1254 * method will be called three times with zoom values 1, 2, and 3. 1255 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1256 * Applications should not call startSmoothZoom again or change the zoom 1257 * value before zoom stops. If the supplied zoom value equals to the current 1258 * zoom value, no zoom callback will be generated. This method is supported 1259 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1260 * returns true. 1261 * 1262 * @param value zoom value. The valid range is 0 to {@link 1263 * android.hardware.Camera.Parameters#getMaxZoom}. 1264 * @throws IllegalArgumentException if the zoom value is invalid. 1265 * @throws RuntimeException if the method fails. 1266 * @see #setZoomChangeListener(OnZoomChangeListener) 1267 */ 1268 public native final void startSmoothZoom(int value); 1269 1270 /** 1271 * Stops the smooth zoom. Applications should wait for the {@link 1272 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1273 * method is supported if {@link 1274 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1275 * 1276 * @throws RuntimeException if the method fails. 1277 */ 1278 public native final void stopSmoothZoom(); 1279 1280 /** 1281 * Set the clockwise rotation of preview display in degrees. This affects 1282 * the preview frames and the picture displayed after snapshot. This method 1283 * is useful for portrait mode applications. Note that preview display of 1284 * front-facing cameras is flipped horizontally before the rotation, that 1285 * is, the image is reflected along the central vertical axis of the camera 1286 * sensor. So the users can see themselves as looking into a mirror. 1287 * 1288 * <p>This does not affect the order of byte array passed in {@link 1289 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1290 * method is not allowed to be called during preview. 1291 * 1292 * <p>If you want to make the camera image show in the same orientation as 1293 * the display, you can use the following code. 1294 * <pre> 1295 * public static void setCameraDisplayOrientation(Activity activity, 1296 * int cameraId, android.hardware.Camera camera) { 1297 * android.hardware.Camera.CameraInfo info = 1298 * new android.hardware.Camera.CameraInfo(); 1299 * android.hardware.Camera.getCameraInfo(cameraId, info); 1300 * int rotation = activity.getWindowManager().getDefaultDisplay() 1301 * .getRotation(); 1302 * int degrees = 0; 1303 * switch (rotation) { 1304 * case Surface.ROTATION_0: degrees = 0; break; 1305 * case Surface.ROTATION_90: degrees = 90; break; 1306 * case Surface.ROTATION_180: degrees = 180; break; 1307 * case Surface.ROTATION_270: degrees = 270; break; 1308 * } 1309 * 1310 * int result; 1311 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1312 * result = (info.orientation + degrees) % 360; 1313 * result = (360 - result) % 360; // compensate the mirror 1314 * } else { // back-facing 1315 * result = (info.orientation - degrees + 360) % 360; 1316 * } 1317 * camera.setDisplayOrientation(result); 1318 * } 1319 * </pre> 1320 * 1321 * <p>Starting from API level 14, this method can be called when preview is 1322 * active. 1323 * 1324 * @param degrees the angle that the picture will be rotated clockwise. 1325 * Valid values are 0, 90, 180, and 270. The starting 1326 * position is 0 (landscape). 1327 * @see #setPreviewDisplay(SurfaceHolder) 1328 */ 1329 public native final void setDisplayOrientation(int degrees); 1330 1331 /** 1332 * <p>Enable or disable the default shutter sound when taking a picture.</p> 1333 * 1334 * <p>By default, the camera plays the system-defined camera shutter sound 1335 * when {@link #takePicture} is called. Using this method, the shutter sound 1336 * can be disabled. It is strongly recommended that an alternative shutter 1337 * sound is played in the {@link ShutterCallback} when the system shutter 1338 * sound is disabled.</p> 1339 * 1340 * <p>Note that devices may not always allow disabling the camera shutter 1341 * sound. If the shutter sound state cannot be set to the desired value, 1342 * this method will return false. {@link CameraInfo#canDisableShutterSound} 1343 * can be used to determine whether the device will allow the shutter sound 1344 * to be disabled.</p> 1345 * 1346 * @param enabled whether the camera should play the system shutter sound 1347 * when {@link #takePicture takePicture} is called. 1348 * @return {@code true} if the shutter sound state was successfully 1349 * changed. {@code false} if the shutter sound state could not be 1350 * changed. {@code true} is also returned if shutter sound playback 1351 * is already set to the requested state. 1352 * @see #takePicture 1353 * @see CameraInfo#canDisableShutterSound 1354 * @see ShutterCallback 1355 */ 1356 public final boolean enableShutterSound(boolean enabled) { 1357 if (!enabled) { 1358 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 1359 IAudioService audioService = IAudioService.Stub.asInterface(b); 1360 try { 1361 if (audioService.isCameraSoundForced()) return false; 1362 } catch (RemoteException e) { 1363 Log.e(TAG, "Audio service is unavailable for queries"); 1364 } 1365 } 1366 return _enableShutterSound(enabled); 1367 } 1368 1369 private native final boolean _enableShutterSound(boolean enabled); 1370 1371 /** 1372 * Callback interface for zoom changes during a smooth zoom operation. 1373 * 1374 * @see #setZoomChangeListener(OnZoomChangeListener) 1375 * @see #startSmoothZoom(int) 1376 */ 1377 public interface OnZoomChangeListener 1378 { 1379 /** 1380 * Called when the zoom value has changed during a smooth zoom. 1381 * 1382 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1383 * calls this for every new zoom value. 1384 * @param stopped whether smooth zoom is stopped. If the value is true, 1385 * this is the last zoom update for the application. 1386 * @param camera the Camera service object 1387 */ 1388 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1389 }; 1390 1391 /** 1392 * Registers a listener to be notified when the zoom value is updated by the 1393 * camera driver during smooth zoom. 1394 * 1395 * @param listener the listener to notify 1396 * @see #startSmoothZoom(int) 1397 */ 1398 public final void setZoomChangeListener(OnZoomChangeListener listener) 1399 { 1400 mZoomListener = listener; 1401 } 1402 1403 /** 1404 * Callback interface for face detected in the preview frame. 1405 * 1406 */ 1407 public interface FaceDetectionListener 1408 { 1409 /** 1410 * Notify the listener of the detected faces in the preview frame. 1411 * 1412 * @param faces The detected faces in a list 1413 * @param camera The {@link Camera} service object 1414 */ 1415 void onFaceDetection(Face[] faces, Camera camera); 1416 } 1417 1418 /** 1419 * Registers a listener to be notified about the faces detected in the 1420 * preview frame. 1421 * 1422 * @param listener the listener to notify 1423 * @see #startFaceDetection() 1424 */ 1425 public final void setFaceDetectionListener(FaceDetectionListener listener) 1426 { 1427 mFaceListener = listener; 1428 } 1429 1430 /** 1431 * Starts the face detection. This should be called after preview is started. 1432 * The camera will notify {@link FaceDetectionListener} of the detected 1433 * faces in the preview frame. The detected faces may be the same as the 1434 * previous ones. Applications should call {@link #stopFaceDetection} to 1435 * stop the face detection. This method is supported if {@link 1436 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1437 * If the face detection has started, apps should not call this again. 1438 * 1439 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1440 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1441 * have no effect. The camera uses the detected faces to do auto-white balance, 1442 * auto exposure, and autofocus. 1443 * 1444 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1445 * will stop sending face callbacks. The last face callback indicates the 1446 * areas used to do autofocus. After focus completes, face detection will 1447 * resume sending face callbacks. If the apps call {@link 1448 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1449 * 1450 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1451 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1452 * preview with {@link #startPreview()}, the apps should call this method 1453 * again to resume face detection.</p> 1454 * 1455 * @throws IllegalArgumentException if the face detection is unsupported. 1456 * @throws RuntimeException if the method fails or the face detection is 1457 * already running. 1458 * @see FaceDetectionListener 1459 * @see #stopFaceDetection() 1460 * @see Parameters#getMaxNumDetectedFaces() 1461 */ 1462 public final void startFaceDetection() { 1463 if (mFaceDetectionRunning) { 1464 throw new RuntimeException("Face detection is already running"); 1465 } 1466 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1467 mFaceDetectionRunning = true; 1468 } 1469 1470 /** 1471 * Stops the face detection. 1472 * 1473 * @see #startFaceDetection() 1474 */ 1475 public final void stopFaceDetection() { 1476 _stopFaceDetection(); 1477 mFaceDetectionRunning = false; 1478 } 1479 1480 private native final void _startFaceDetection(int type); 1481 private native final void _stopFaceDetection(); 1482 1483 /** 1484 * Information about a face identified through camera face detection. 1485 * 1486 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1487 * list of face objects for use in focusing and metering.</p> 1488 * 1489 * @see FaceDetectionListener 1490 */ 1491 public static class Face { 1492 /** 1493 * Create an empty face. 1494 */ 1495 public Face() { 1496 } 1497 1498 /** 1499 * Bounds of the face. (-1000, -1000) represents the top-left of the 1500 * camera field of view, and (1000, 1000) represents the bottom-right of 1501 * the field of view. For example, suppose the size of the viewfinder UI 1502 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1503 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1504 * guaranteed left < right and top < bottom. The coordinates can be 1505 * smaller than -1000 or bigger than 1000. But at least one vertex will 1506 * be within (-1000, -1000) and (1000, 1000). 1507 * 1508 * <p>The direction is relative to the sensor orientation, that is, what 1509 * the sensor sees. The direction is not affected by the rotation or 1510 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1511 * rectangle does not provide any information about face orientation.</p> 1512 * 1513 * <p>Here is the matrix to convert driver coordinates to View coordinates 1514 * in pixels.</p> 1515 * <pre> 1516 * Matrix matrix = new Matrix(); 1517 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1518 * // Need mirror for front camera. 1519 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1520 * matrix.setScale(mirror ? -1 : 1, 1); 1521 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1522 * matrix.postRotate(displayOrientation); 1523 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1524 * // UI coordinates range from (0, 0) to (width, height). 1525 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1526 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1527 * </pre> 1528 * 1529 * @see #startFaceDetection() 1530 */ 1531 public Rect rect; 1532 1533 /** 1534 * <p>The confidence level for the detection of the face. The range is 1 to 1535 * 100. 100 is the highest confidence.</p> 1536 * 1537 * <p>Depending on the device, even very low-confidence faces may be 1538 * listed, so applications should filter out faces with low confidence, 1539 * depending on the use case. For a typical point-and-shoot camera 1540 * application that wishes to display rectangles around detected faces, 1541 * filtering out faces with confidence less than 50 is recommended.</p> 1542 * 1543 * @see #startFaceDetection() 1544 */ 1545 public int score; 1546 1547 /** 1548 * An unique id per face while the face is visible to the tracker. If 1549 * the face leaves the field-of-view and comes back, it will get a new 1550 * id. This is an optional field, may not be supported on all devices. 1551 * If not supported, id will always be set to -1. The optional fields 1552 * are supported as a set. Either they are all valid, or none of them 1553 * are. 1554 */ 1555 public int id = -1; 1556 1557 /** 1558 * The coordinates of the center of the left eye. The coordinates are in 1559 * the same space as the ones for {@link #rect}. This is an optional 1560 * field, may not be supported on all devices. If not supported, the 1561 * value will always be set to null. The optional fields are supported 1562 * as a set. Either they are all valid, or none of them are. 1563 */ 1564 public Point leftEye = null; 1565 1566 /** 1567 * The coordinates of the center of the right eye. The coordinates are 1568 * in the same space as the ones for {@link #rect}.This is an optional 1569 * field, may not be supported on all devices. If not supported, the 1570 * value will always be set to null. The optional fields are supported 1571 * as a set. Either they are all valid, or none of them are. 1572 */ 1573 public Point rightEye = null; 1574 1575 /** 1576 * The coordinates of the center of the mouth. The coordinates are in 1577 * the same space as the ones for {@link #rect}. This is an optional 1578 * field, may not be supported on all devices. If not supported, the 1579 * value will always be set to null. The optional fields are supported 1580 * as a set. Either they are all valid, or none of them are. 1581 */ 1582 public Point mouth = null; 1583 } 1584 1585 // Error codes match the enum in include/ui/Camera.h 1586 1587 /** 1588 * Unspecified camera error. 1589 * @see Camera.ErrorCallback 1590 */ 1591 public static final int CAMERA_ERROR_UNKNOWN = 1; 1592 1593 /** 1594 * Media server died. In this case, the application must release the 1595 * Camera object and instantiate a new one. 1596 * @see Camera.ErrorCallback 1597 */ 1598 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1599 1600 /** 1601 * Callback interface for camera error notification. 1602 * 1603 * @see #setErrorCallback(ErrorCallback) 1604 */ 1605 public interface ErrorCallback 1606 { 1607 /** 1608 * Callback for camera errors. 1609 * @param error error code: 1610 * <ul> 1611 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1612 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1613 * </ul> 1614 * @param camera the Camera service object 1615 */ 1616 void onError(int error, Camera camera); 1617 }; 1618 1619 /** 1620 * Registers a callback to be invoked when an error occurs. 1621 * @param cb The callback to run 1622 */ 1623 public final void setErrorCallback(ErrorCallback cb) 1624 { 1625 mErrorCallback = cb; 1626 } 1627 1628 private native final void native_setParameters(String params); 1629 private native final String native_getParameters(); 1630 1631 /** 1632 * Changes the settings for this Camera service. 1633 * 1634 * @param params the Parameters to use for this Camera service 1635 * @throws RuntimeException if any parameter is invalid or not supported. 1636 * @see #getParameters() 1637 */ 1638 public void setParameters(Parameters params) { 1639 // If using preview allocations, don't allow preview size changes 1640 if (mUsingPreviewAllocation) { 1641 Size newPreviewSize = params.getPreviewSize(); 1642 Size currentPreviewSize = getParameters().getPreviewSize(); 1643 if (newPreviewSize.width != currentPreviewSize.width || 1644 newPreviewSize.height != currentPreviewSize.height) { 1645 throw new IllegalStateException("Cannot change preview size" + 1646 " while a preview allocation is configured."); 1647 } 1648 } 1649 1650 native_setParameters(params.flatten()); 1651 } 1652 1653 /** 1654 * Returns the current settings for this Camera service. 1655 * If modifications are made to the returned Parameters, they must be passed 1656 * to {@link #setParameters(Camera.Parameters)} to take effect. 1657 * 1658 * @see #setParameters(Camera.Parameters) 1659 */ 1660 public Parameters getParameters() { 1661 Parameters p = new Parameters(); 1662 String s = native_getParameters(); 1663 p.unflatten(s); 1664 return p; 1665 } 1666 1667 /** 1668 * Returns an empty {@link Parameters} for testing purpose. 1669 * 1670 * @return a Parameter object. 1671 * 1672 * @hide 1673 */ 1674 public static Parameters getEmptyParameters() { 1675 Camera camera = new Camera(); 1676 return camera.new Parameters(); 1677 } 1678 1679 /** 1680 * Image size (width and height dimensions). 1681 */ 1682 public class Size { 1683 /** 1684 * Sets the dimensions for pictures. 1685 * 1686 * @param w the photo width (pixels) 1687 * @param h the photo height (pixels) 1688 */ 1689 public Size(int w, int h) { 1690 width = w; 1691 height = h; 1692 } 1693 /** 1694 * Compares {@code obj} to this size. 1695 * 1696 * @param obj the object to compare this size with. 1697 * @return {@code true} if the width and height of {@code obj} is the 1698 * same as those of this size. {@code false} otherwise. 1699 */ 1700 @Override 1701 public boolean equals(Object obj) { 1702 if (!(obj instanceof Size)) { 1703 return false; 1704 } 1705 Size s = (Size) obj; 1706 return width == s.width && height == s.height; 1707 } 1708 @Override 1709 public int hashCode() { 1710 return width * 32713 + height; 1711 } 1712 /** width of the picture */ 1713 public int width; 1714 /** height of the picture */ 1715 public int height; 1716 }; 1717 1718 /** 1719 * <p>The Area class is used for choosing specific metering and focus areas for 1720 * the camera to use when calculating auto-exposure, auto-white balance, and 1721 * auto-focus.</p> 1722 * 1723 * <p>To find out how many simultaneous areas a given camera supports, use 1724 * {@link Parameters#getMaxNumMeteringAreas()} and 1725 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1726 * selection is unsupported, these methods will return 0.</p> 1727 * 1728 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1729 * that determines its importance. The bounds are relative to the camera's 1730 * current field of view. The coordinates are mapped so that (-1000, -1000) 1731 * is always the top-left corner of the current field of view, and (1000, 1732 * 1000) is always the bottom-right corner of the current field of 1733 * view. Setting Areas with bounds outside that range is not allowed. Areas 1734 * with zero or negative width or height are not allowed.</p> 1735 * 1736 * <p>The weight must range from 1 to 1000, and represents a weight for 1737 * every pixel in the area. This means that a large metering area with 1738 * the same weight as a smaller area will have more effect in the 1739 * metering result. Metering areas can overlap and the driver 1740 * will add the weights in the overlap region.</p> 1741 * 1742 * @see Parameters#setFocusAreas(List) 1743 * @see Parameters#getFocusAreas() 1744 * @see Parameters#getMaxNumFocusAreas() 1745 * @see Parameters#setMeteringAreas(List) 1746 * @see Parameters#getMeteringAreas() 1747 * @see Parameters#getMaxNumMeteringAreas() 1748 */ 1749 public static class Area { 1750 /** 1751 * Create an area with specified rectangle and weight. 1752 * 1753 * @param rect the bounds of the area. 1754 * @param weight the weight of the area. 1755 */ 1756 public Area(Rect rect, int weight) { 1757 this.rect = rect; 1758 this.weight = weight; 1759 } 1760 /** 1761 * Compares {@code obj} to this area. 1762 * 1763 * @param obj the object to compare this area with. 1764 * @return {@code true} if the rectangle and weight of {@code obj} is 1765 * the same as those of this area. {@code false} otherwise. 1766 */ 1767 @Override 1768 public boolean equals(Object obj) { 1769 if (!(obj instanceof Area)) { 1770 return false; 1771 } 1772 Area a = (Area) obj; 1773 if (rect == null) { 1774 if (a.rect != null) return false; 1775 } else { 1776 if (!rect.equals(a.rect)) return false; 1777 } 1778 return weight == a.weight; 1779 } 1780 1781 /** 1782 * Bounds of the area. (-1000, -1000) represents the top-left of the 1783 * camera field of view, and (1000, 1000) represents the bottom-right of 1784 * the field of view. Setting bounds outside that range is not 1785 * allowed. Bounds with zero or negative width or height are not 1786 * allowed. 1787 * 1788 * @see Parameters#getFocusAreas() 1789 * @see Parameters#getMeteringAreas() 1790 */ 1791 public Rect rect; 1792 1793 /** 1794 * Weight of the area. The weight must range from 1 to 1000, and 1795 * represents a weight for every pixel in the area. This means that a 1796 * large metering area with the same weight as a smaller area will have 1797 * more effect in the metering result. Metering areas can overlap and 1798 * the driver will add the weights in the overlap region. 1799 * 1800 * @see Parameters#getFocusAreas() 1801 * @see Parameters#getMeteringAreas() 1802 */ 1803 public int weight; 1804 } 1805 1806 /** 1807 * Camera service settings. 1808 * 1809 * <p>To make camera parameters take effect, applications have to call 1810 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1811 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1812 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1813 * is called with the changed parameters object. 1814 * 1815 * <p>Different devices may have different camera capabilities, such as 1816 * picture size or flash modes. The application should query the camera 1817 * capabilities before setting parameters. For example, the application 1818 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1819 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1820 * camera does not support color effects, 1821 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1822 */ 1823 public class Parameters { 1824 // Parameter keys to communicate with the camera driver. 1825 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1826 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1827 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1828 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1829 private static final String KEY_PICTURE_SIZE = "picture-size"; 1830 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1831 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1832 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1833 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1834 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1835 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1836 private static final String KEY_ROTATION = "rotation"; 1837 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1838 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1839 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1840 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1841 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1842 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1843 private static final String KEY_EFFECT = "effect"; 1844 private static final String KEY_ANTIBANDING = "antibanding"; 1845 private static final String KEY_SCENE_MODE = "scene-mode"; 1846 private static final String KEY_FLASH_MODE = "flash-mode"; 1847 private static final String KEY_FOCUS_MODE = "focus-mode"; 1848 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1849 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1850 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1851 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1852 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1853 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1854 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1855 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1856 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1857 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1858 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1859 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1860 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1861 private static final String KEY_METERING_AREAS = "metering-areas"; 1862 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1863 private static final String KEY_ZOOM = "zoom"; 1864 private static final String KEY_MAX_ZOOM = "max-zoom"; 1865 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1866 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1867 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1868 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1869 private static final String KEY_VIDEO_SIZE = "video-size"; 1870 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1871 "preferred-preview-size-for-video"; 1872 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 1873 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 1874 private static final String KEY_RECORDING_HINT = "recording-hint"; 1875 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 1876 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 1877 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 1878 1879 // Parameter key suffix for supported values. 1880 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1881 1882 private static final String TRUE = "true"; 1883 private static final String FALSE = "false"; 1884 1885 // Values for white balance settings. 1886 public static final String WHITE_BALANCE_AUTO = "auto"; 1887 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1888 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1889 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1890 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1891 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1892 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1893 public static final String WHITE_BALANCE_SHADE = "shade"; 1894 1895 // Values for color effect settings. 1896 public static final String EFFECT_NONE = "none"; 1897 public static final String EFFECT_MONO = "mono"; 1898 public static final String EFFECT_NEGATIVE = "negative"; 1899 public static final String EFFECT_SOLARIZE = "solarize"; 1900 public static final String EFFECT_SEPIA = "sepia"; 1901 public static final String EFFECT_POSTERIZE = "posterize"; 1902 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1903 public static final String EFFECT_BLACKBOARD = "blackboard"; 1904 public static final String EFFECT_AQUA = "aqua"; 1905 1906 // Values for antibanding settings. 1907 public static final String ANTIBANDING_AUTO = "auto"; 1908 public static final String ANTIBANDING_50HZ = "50hz"; 1909 public static final String ANTIBANDING_60HZ = "60hz"; 1910 public static final String ANTIBANDING_OFF = "off"; 1911 1912 // Values for flash mode settings. 1913 /** 1914 * Flash will not be fired. 1915 */ 1916 public static final String FLASH_MODE_OFF = "off"; 1917 1918 /** 1919 * Flash will be fired automatically when required. The flash may be fired 1920 * during preview, auto-focus, or snapshot depending on the driver. 1921 */ 1922 public static final String FLASH_MODE_AUTO = "auto"; 1923 1924 /** 1925 * Flash will always be fired during snapshot. The flash may also be 1926 * fired during preview or auto-focus depending on the driver. 1927 */ 1928 public static final String FLASH_MODE_ON = "on"; 1929 1930 /** 1931 * Flash will be fired in red-eye reduction mode. 1932 */ 1933 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1934 1935 /** 1936 * Constant emission of light during preview, auto-focus and snapshot. 1937 * This can also be used for video recording. 1938 */ 1939 public static final String FLASH_MODE_TORCH = "torch"; 1940 1941 /** 1942 * Scene mode is off. 1943 */ 1944 public static final String SCENE_MODE_AUTO = "auto"; 1945 1946 /** 1947 * Take photos of fast moving objects. Same as {@link 1948 * #SCENE_MODE_SPORTS}. 1949 */ 1950 public static final String SCENE_MODE_ACTION = "action"; 1951 1952 /** 1953 * Take people pictures. 1954 */ 1955 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1956 1957 /** 1958 * Take pictures on distant objects. 1959 */ 1960 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1961 1962 /** 1963 * Take photos at night. 1964 */ 1965 public static final String SCENE_MODE_NIGHT = "night"; 1966 1967 /** 1968 * Take people pictures at night. 1969 */ 1970 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1971 1972 /** 1973 * Take photos in a theater. Flash light is off. 1974 */ 1975 public static final String SCENE_MODE_THEATRE = "theatre"; 1976 1977 /** 1978 * Take pictures on the beach. 1979 */ 1980 public static final String SCENE_MODE_BEACH = "beach"; 1981 1982 /** 1983 * Take pictures on the snow. 1984 */ 1985 public static final String SCENE_MODE_SNOW = "snow"; 1986 1987 /** 1988 * Take sunset photos. 1989 */ 1990 public static final String SCENE_MODE_SUNSET = "sunset"; 1991 1992 /** 1993 * Avoid blurry pictures (for example, due to hand shake). 1994 */ 1995 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1996 1997 /** 1998 * For shooting firework displays. 1999 */ 2000 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 2001 2002 /** 2003 * Take photos of fast moving objects. Same as {@link 2004 * #SCENE_MODE_ACTION}. 2005 */ 2006 public static final String SCENE_MODE_SPORTS = "sports"; 2007 2008 /** 2009 * Take indoor low-light shot. 2010 */ 2011 public static final String SCENE_MODE_PARTY = "party"; 2012 2013 /** 2014 * Capture the naturally warm color of scenes lit by candles. 2015 */ 2016 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 2017 2018 /** 2019 * Applications are looking for a barcode. Camera driver will be 2020 * optimized for barcode reading. 2021 */ 2022 public static final String SCENE_MODE_BARCODE = "barcode"; 2023 2024 /** 2025 * Capture a scene using high dynamic range imaging techniques. The 2026 * camera will return an image that has an extended dynamic range 2027 * compared to a regular capture. Capturing such an image may take 2028 * longer than a regular capture. 2029 */ 2030 public static final String SCENE_MODE_HDR = "hdr"; 2031 2032 /** 2033 * Auto-focus mode. Applications should call {@link 2034 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 2035 */ 2036 public static final String FOCUS_MODE_AUTO = "auto"; 2037 2038 /** 2039 * Focus is set at infinity. Applications should not call 2040 * {@link #autoFocus(AutoFocusCallback)} in this mode. 2041 */ 2042 public static final String FOCUS_MODE_INFINITY = "infinity"; 2043 2044 /** 2045 * Macro (close-up) focus mode. Applications should call 2046 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 2047 * mode. 2048 */ 2049 public static final String FOCUS_MODE_MACRO = "macro"; 2050 2051 /** 2052 * Focus is fixed. The camera is always in this mode if the focus is not 2053 * adjustable. If the camera has auto-focus, this mode can fix the 2054 * focus, which is usually at hyperfocal distance. Applications should 2055 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 2056 */ 2057 public static final String FOCUS_MODE_FIXED = "fixed"; 2058 2059 /** 2060 * Extended depth of field (EDOF). Focusing is done digitally and 2061 * continuously. Applications should not call {@link 2062 * #autoFocus(AutoFocusCallback)} in this mode. 2063 */ 2064 public static final String FOCUS_MODE_EDOF = "edof"; 2065 2066 /** 2067 * Continuous auto focus mode intended for video recording. The camera 2068 * continuously tries to focus. This is the best choice for video 2069 * recording because the focus changes smoothly . Applications still can 2070 * call {@link #takePicture(Camera.ShutterCallback, 2071 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 2072 * subject may not be in focus. Auto focus starts when the parameter is 2073 * set. 2074 * 2075 * <p>Since API level 14, applications can call {@link 2076 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 2077 * immediately return with a boolean that indicates whether the focus is 2078 * sharp or not. The focus position is locked after autoFocus call. If 2079 * applications want to resume the continuous focus, cancelAutoFocus 2080 * must be called. Restarting the preview will not resume the continuous 2081 * autofocus. To stop continuous focus, applications should change the 2082 * focus mode to other modes. 2083 * 2084 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 2085 */ 2086 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 2087 2088 /** 2089 * Continuous auto focus mode intended for taking pictures. The camera 2090 * continuously tries to focus. The speed of focus change is more 2091 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 2092 * starts when the parameter is set. 2093 * 2094 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 2095 * this mode. If the autofocus is in the middle of scanning, the focus 2096 * callback will return when it completes. If the autofocus is not 2097 * scanning, the focus callback will immediately return with a boolean 2098 * that indicates whether the focus is sharp or not. The apps can then 2099 * decide if they want to take a picture immediately or to change the 2100 * focus mode to auto, and run a full autofocus cycle. The focus 2101 * position is locked after autoFocus call. If applications want to 2102 * resume the continuous focus, cancelAutoFocus must be called. 2103 * Restarting the preview will not resume the continuous autofocus. To 2104 * stop continuous focus, applications should change the focus mode to 2105 * other modes. 2106 * 2107 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2108 */ 2109 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 2110 2111 // Indices for focus distance array. 2112 /** 2113 * The array index of near focus distance for use with 2114 * {@link #getFocusDistances(float[])}. 2115 */ 2116 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 2117 2118 /** 2119 * The array index of optimal focus distance for use with 2120 * {@link #getFocusDistances(float[])}. 2121 */ 2122 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 2123 2124 /** 2125 * The array index of far focus distance for use with 2126 * {@link #getFocusDistances(float[])}. 2127 */ 2128 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 2129 2130 /** 2131 * The array index of minimum preview fps for use with {@link 2132 * #getPreviewFpsRange(int[])} or {@link 2133 * #getSupportedPreviewFpsRange()}. 2134 */ 2135 public static final int PREVIEW_FPS_MIN_INDEX = 0; 2136 2137 /** 2138 * The array index of maximum preview fps for use with {@link 2139 * #getPreviewFpsRange(int[])} or {@link 2140 * #getSupportedPreviewFpsRange()}. 2141 */ 2142 public static final int PREVIEW_FPS_MAX_INDEX = 1; 2143 2144 // Formats for setPreviewFormat and setPictureFormat. 2145 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 2146 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 2147 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 2148 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 2149 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 2150 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 2151 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 2152 2153 private HashMap<String, String> mMap; 2154 2155 private Parameters() { 2156 mMap = new HashMap<String, String>(64); 2157 } 2158 2159 /** 2160 * Writes the current Parameters to the log. 2161 * @hide 2162 * @deprecated 2163 */ 2164 public void dump() { 2165 Log.e(TAG, "dump: size=" + mMap.size()); 2166 for (String k : mMap.keySet()) { 2167 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 2168 } 2169 } 2170 2171 /** 2172 * Creates a single string with all the parameters set in 2173 * this Parameters object. 2174 * <p>The {@link #unflatten(String)} method does the reverse.</p> 2175 * 2176 * @return a String with all values from this Parameters object, in 2177 * semi-colon delimited key-value pairs 2178 */ 2179 public String flatten() { 2180 StringBuilder flattened = new StringBuilder(128); 2181 for (String k : mMap.keySet()) { 2182 flattened.append(k); 2183 flattened.append("="); 2184 flattened.append(mMap.get(k)); 2185 flattened.append(";"); 2186 } 2187 // chop off the extra semicolon at the end 2188 flattened.deleteCharAt(flattened.length()-1); 2189 return flattened.toString(); 2190 } 2191 2192 /** 2193 * Takes a flattened string of parameters and adds each one to 2194 * this Parameters object. 2195 * <p>The {@link #flatten()} method does the reverse.</p> 2196 * 2197 * @param flattened a String of parameters (key-value paired) that 2198 * are semi-colon delimited 2199 */ 2200 public void unflatten(String flattened) { 2201 mMap.clear(); 2202 2203 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(';'); 2204 splitter.setString(flattened); 2205 for (String kv : splitter) { 2206 int pos = kv.indexOf('='); 2207 if (pos == -1) { 2208 continue; 2209 } 2210 String k = kv.substring(0, pos); 2211 String v = kv.substring(pos + 1); 2212 mMap.put(k, v); 2213 } 2214 } 2215 2216 public void remove(String key) { 2217 mMap.remove(key); 2218 } 2219 2220 /** 2221 * Sets a String parameter. 2222 * 2223 * @param key the key name for the parameter 2224 * @param value the String value of the parameter 2225 */ 2226 public void set(String key, String value) { 2227 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 2228 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 2229 return; 2230 } 2231 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 2232 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 2233 return; 2234 } 2235 2236 mMap.put(key, value); 2237 } 2238 2239 /** 2240 * Sets an integer parameter. 2241 * 2242 * @param key the key name for the parameter 2243 * @param value the int value of the parameter 2244 */ 2245 public void set(String key, int value) { 2246 mMap.put(key, Integer.toString(value)); 2247 } 2248 2249 private void set(String key, List<Area> areas) { 2250 if (areas == null) { 2251 set(key, "(0,0,0,0,0)"); 2252 } else { 2253 StringBuilder buffer = new StringBuilder(); 2254 for (int i = 0; i < areas.size(); i++) { 2255 Area area = areas.get(i); 2256 Rect rect = area.rect; 2257 buffer.append('('); 2258 buffer.append(rect.left); 2259 buffer.append(','); 2260 buffer.append(rect.top); 2261 buffer.append(','); 2262 buffer.append(rect.right); 2263 buffer.append(','); 2264 buffer.append(rect.bottom); 2265 buffer.append(','); 2266 buffer.append(area.weight); 2267 buffer.append(')'); 2268 if (i != areas.size() - 1) buffer.append(','); 2269 } 2270 set(key, buffer.toString()); 2271 } 2272 } 2273 2274 /** 2275 * Returns the value of a String parameter. 2276 * 2277 * @param key the key name for the parameter 2278 * @return the String value of the parameter 2279 */ 2280 public String get(String key) { 2281 return mMap.get(key); 2282 } 2283 2284 /** 2285 * Returns the value of an integer parameter. 2286 * 2287 * @param key the key name for the parameter 2288 * @return the int value of the parameter 2289 */ 2290 public int getInt(String key) { 2291 return Integer.parseInt(mMap.get(key)); 2292 } 2293 2294 /** 2295 * Sets the dimensions for preview pictures. If the preview has already 2296 * started, applications should stop the preview first before changing 2297 * preview size. 2298 * 2299 * The sides of width and height are based on camera orientation. That 2300 * is, the preview size is the size before it is rotated by display 2301 * orientation. So applications need to consider the display orientation 2302 * while setting preview size. For example, suppose the camera supports 2303 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2304 * preview ratio. If the display orientation is set to 0 or 180, preview 2305 * size should be set to 480x320. If the display orientation is set to 2306 * 90 or 270, preview size should be set to 320x480. The display 2307 * orientation should also be considered while setting picture size and 2308 * thumbnail size. 2309 * 2310 * @param width the width of the pictures, in pixels 2311 * @param height the height of the pictures, in pixels 2312 * @see #setDisplayOrientation(int) 2313 * @see #getCameraInfo(int, CameraInfo) 2314 * @see #setPictureSize(int, int) 2315 * @see #setJpegThumbnailSize(int, int) 2316 */ 2317 public void setPreviewSize(int width, int height) { 2318 String v = Integer.toString(width) + "x" + Integer.toString(height); 2319 set(KEY_PREVIEW_SIZE, v); 2320 } 2321 2322 /** 2323 * Returns the dimensions setting for preview pictures. 2324 * 2325 * @return a Size object with the width and height setting 2326 * for the preview picture 2327 */ 2328 public Size getPreviewSize() { 2329 String pair = get(KEY_PREVIEW_SIZE); 2330 return strToSize(pair); 2331 } 2332 2333 /** 2334 * Gets the supported preview sizes. 2335 * 2336 * @return a list of Size object. This method will always return a list 2337 * with at least one element. 2338 */ 2339 public List<Size> getSupportedPreviewSizes() { 2340 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2341 return splitSize(str); 2342 } 2343 2344 /** 2345 * <p>Gets the supported video frame sizes that can be used by 2346 * MediaRecorder.</p> 2347 * 2348 * <p>If the returned list is not null, the returned list will contain at 2349 * least one Size and one of the sizes in the returned list must be 2350 * passed to MediaRecorder.setVideoSize() for camcorder application if 2351 * camera is used as the video source. In this case, the size of the 2352 * preview can be different from the resolution of the recorded video 2353 * during video recording.</p> 2354 * 2355 * @return a list of Size object if camera has separate preview and 2356 * video output; otherwise, null is returned. 2357 * @see #getPreferredPreviewSizeForVideo() 2358 */ 2359 public List<Size> getSupportedVideoSizes() { 2360 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2361 return splitSize(str); 2362 } 2363 2364 /** 2365 * Returns the preferred or recommended preview size (width and height) 2366 * in pixels for video recording. Camcorder applications should 2367 * set the preview size to a value that is not larger than the 2368 * preferred preview size. In other words, the product of the width 2369 * and height of the preview size should not be larger than that of 2370 * the preferred preview size. In addition, we recommend to choose a 2371 * preview size that has the same aspect ratio as the resolution of 2372 * video to be recorded. 2373 * 2374 * @return the preferred preview size (width and height) in pixels for 2375 * video recording if getSupportedVideoSizes() does not return 2376 * null; otherwise, null is returned. 2377 * @see #getSupportedVideoSizes() 2378 */ 2379 public Size getPreferredPreviewSizeForVideo() { 2380 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2381 return strToSize(pair); 2382 } 2383 2384 /** 2385 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2386 * applications set both width and height to 0, EXIF will not contain 2387 * thumbnail.</p> 2388 * 2389 * <p>Applications need to consider the display orientation. See {@link 2390 * #setPreviewSize(int,int)} for reference.</p> 2391 * 2392 * @param width the width of the thumbnail, in pixels 2393 * @param height the height of the thumbnail, in pixels 2394 * @see #setPreviewSize(int,int) 2395 */ 2396 public void setJpegThumbnailSize(int width, int height) { 2397 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2398 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2399 } 2400 2401 /** 2402 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2403 * 2404 * @return a Size object with the height and width setting for the EXIF 2405 * thumbnails 2406 */ 2407 public Size getJpegThumbnailSize() { 2408 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2409 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2410 } 2411 2412 /** 2413 * Gets the supported jpeg thumbnail sizes. 2414 * 2415 * @return a list of Size object. This method will always return a list 2416 * with at least two elements. Size 0,0 (no thumbnail) is always 2417 * supported. 2418 */ 2419 public List<Size> getSupportedJpegThumbnailSizes() { 2420 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2421 return splitSize(str); 2422 } 2423 2424 /** 2425 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2426 * 2427 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2428 * to 100, with 100 being the best. 2429 */ 2430 public void setJpegThumbnailQuality(int quality) { 2431 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2432 } 2433 2434 /** 2435 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2436 * 2437 * @return the JPEG quality setting of the EXIF thumbnail. 2438 */ 2439 public int getJpegThumbnailQuality() { 2440 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2441 } 2442 2443 /** 2444 * Sets Jpeg quality of captured picture. 2445 * 2446 * @param quality the JPEG quality of captured picture. The range is 1 2447 * to 100, with 100 being the best. 2448 */ 2449 public void setJpegQuality(int quality) { 2450 set(KEY_JPEG_QUALITY, quality); 2451 } 2452 2453 /** 2454 * Returns the quality setting for the JPEG picture. 2455 * 2456 * @return the JPEG picture quality setting. 2457 */ 2458 public int getJpegQuality() { 2459 return getInt(KEY_JPEG_QUALITY); 2460 } 2461 2462 /** 2463 * Sets the rate at which preview frames are received. This is the 2464 * target frame rate. The actual frame rate depends on the driver. 2465 * 2466 * @param fps the frame rate (frames per second) 2467 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2468 */ 2469 @Deprecated 2470 public void setPreviewFrameRate(int fps) { 2471 set(KEY_PREVIEW_FRAME_RATE, fps); 2472 } 2473 2474 /** 2475 * Returns the setting for the rate at which preview frames are 2476 * received. This is the target frame rate. The actual frame rate 2477 * depends on the driver. 2478 * 2479 * @return the frame rate setting (frames per second) 2480 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2481 */ 2482 @Deprecated 2483 public int getPreviewFrameRate() { 2484 return getInt(KEY_PREVIEW_FRAME_RATE); 2485 } 2486 2487 /** 2488 * Gets the supported preview frame rates. 2489 * 2490 * @return a list of supported preview frame rates. null if preview 2491 * frame rate setting is not supported. 2492 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2493 */ 2494 @Deprecated 2495 public List<Integer> getSupportedPreviewFrameRates() { 2496 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2497 return splitInt(str); 2498 } 2499 2500 /** 2501 * Sets the minimum and maximum preview fps. This controls the rate of 2502 * preview frames received in {@link PreviewCallback}. The minimum and 2503 * maximum preview fps must be one of the elements from {@link 2504 * #getSupportedPreviewFpsRange}. 2505 * 2506 * @param min the minimum preview fps (scaled by 1000). 2507 * @param max the maximum preview fps (scaled by 1000). 2508 * @throws RuntimeException if fps range is invalid. 2509 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2510 * @see #getSupportedPreviewFpsRange() 2511 */ 2512 public void setPreviewFpsRange(int min, int max) { 2513 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2514 } 2515 2516 /** 2517 * Returns the current minimum and maximum preview fps. The values are 2518 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2519 * 2520 * @return range the minimum and maximum preview fps (scaled by 1000). 2521 * @see #PREVIEW_FPS_MIN_INDEX 2522 * @see #PREVIEW_FPS_MAX_INDEX 2523 * @see #getSupportedPreviewFpsRange() 2524 */ 2525 public void getPreviewFpsRange(int[] range) { 2526 if (range == null || range.length != 2) { 2527 throw new IllegalArgumentException( 2528 "range must be an array with two elements."); 2529 } 2530 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2531 } 2532 2533 /** 2534 * Gets the supported preview fps (frame-per-second) ranges. Each range 2535 * contains a minimum fps and maximum fps. If minimum fps equals to 2536 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2537 * the camera outputs frames in auto frame rate. The actual frame rate 2538 * fluctuates between the minimum and the maximum. The values are 2539 * multiplied by 1000 and represented in integers. For example, if frame 2540 * rate is 26.623 frames per second, the value is 26623. 2541 * 2542 * @return a list of supported preview fps ranges. This method returns a 2543 * list with at least one element. Every element is an int array 2544 * of two values - minimum fps and maximum fps. The list is 2545 * sorted from small to large (first by maximum fps and then 2546 * minimum fps). 2547 * @see #PREVIEW_FPS_MIN_INDEX 2548 * @see #PREVIEW_FPS_MAX_INDEX 2549 */ 2550 public List<int[]> getSupportedPreviewFpsRange() { 2551 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2552 return splitRange(str); 2553 } 2554 2555 /** 2556 * Sets the image format for preview pictures. 2557 * <p>If this is never called, the default format will be 2558 * {@link android.graphics.ImageFormat#NV21}, which 2559 * uses the NV21 encoding format.</p> 2560 * 2561 * <p>Use {@link Parameters#getSupportedPreviewFormats} to get a list of 2562 * the available preview formats. 2563 * 2564 * <p>It is strongly recommended that either 2565 * {@link android.graphics.ImageFormat#NV21} or 2566 * {@link android.graphics.ImageFormat#YV12} is used, since 2567 * they are supported by all camera devices.</p> 2568 * 2569 * <p>For YV12, the image buffer that is received is not necessarily 2570 * tightly packed, as there may be padding at the end of each row of 2571 * pixel data, as described in 2572 * {@link android.graphics.ImageFormat#YV12}. For camera callback data, 2573 * it can be assumed that the stride of the Y and UV data is the 2574 * smallest possible that meets the alignment requirements. That is, if 2575 * the preview size is <var>width x height</var>, then the following 2576 * equations describe the buffer index for the beginning of row 2577 * <var>y</var> for the Y plane and row <var>c</var> for the U and V 2578 * planes: 2579 * 2580 * {@code 2581 * <pre> 2582 * yStride = (int) ceil(width / 16.0) * 16; 2583 * uvStride = (int) ceil( (yStride / 2) / 16.0) * 16; 2584 * ySize = yStride * height; 2585 * uvSize = uvStride * height / 2; 2586 * yRowIndex = yStride * y; 2587 * uRowIndex = ySize + uvSize + uvStride * c; 2588 * vRowIndex = ySize + uvStride * c; 2589 * size = ySize + uvSize * 2;</pre> 2590 * } 2591 * 2592 * @param pixel_format the desired preview picture format, defined by 2593 * one of the {@link android.graphics.ImageFormat} constants. (E.g., 2594 * <var>ImageFormat.NV21</var> (default), or 2595 * <var>ImageFormat.YV12</var>) 2596 * 2597 * @see android.graphics.ImageFormat 2598 * @see android.hardware.Camera.Parameters#getSupportedPreviewFormats 2599 */ 2600 public void setPreviewFormat(int pixel_format) { 2601 String s = cameraFormatForPixelFormat(pixel_format); 2602 if (s == null) { 2603 throw new IllegalArgumentException( 2604 "Invalid pixel_format=" + pixel_format); 2605 } 2606 2607 set(KEY_PREVIEW_FORMAT, s); 2608 } 2609 2610 /** 2611 * Returns the image format for preview frames got from 2612 * {@link PreviewCallback}. 2613 * 2614 * @return the preview format. 2615 * @see android.graphics.ImageFormat 2616 * @see #setPreviewFormat 2617 */ 2618 public int getPreviewFormat() { 2619 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2620 } 2621 2622 /** 2623 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2624 * is always supported. {@link android.graphics.ImageFormat#YV12} 2625 * is always supported since API level 12. 2626 * 2627 * @return a list of supported preview formats. This method will always 2628 * return a list with at least one element. 2629 * @see android.graphics.ImageFormat 2630 * @see #setPreviewFormat 2631 */ 2632 public List<Integer> getSupportedPreviewFormats() { 2633 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2634 ArrayList<Integer> formats = new ArrayList<Integer>(); 2635 for (String s : split(str)) { 2636 int f = pixelFormatForCameraFormat(s); 2637 if (f == ImageFormat.UNKNOWN) continue; 2638 formats.add(f); 2639 } 2640 return formats; 2641 } 2642 2643 /** 2644 * <p>Sets the dimensions for pictures.</p> 2645 * 2646 * <p>Applications need to consider the display orientation. See {@link 2647 * #setPreviewSize(int,int)} for reference.</p> 2648 * 2649 * @param width the width for pictures, in pixels 2650 * @param height the height for pictures, in pixels 2651 * @see #setPreviewSize(int,int) 2652 * 2653 */ 2654 public void setPictureSize(int width, int height) { 2655 String v = Integer.toString(width) + "x" + Integer.toString(height); 2656 set(KEY_PICTURE_SIZE, v); 2657 } 2658 2659 /** 2660 * Returns the dimension setting for pictures. 2661 * 2662 * @return a Size object with the height and width setting 2663 * for pictures 2664 */ 2665 public Size getPictureSize() { 2666 String pair = get(KEY_PICTURE_SIZE); 2667 return strToSize(pair); 2668 } 2669 2670 /** 2671 * Gets the supported picture sizes. 2672 * 2673 * @return a list of supported picture sizes. This method will always 2674 * return a list with at least one element. 2675 */ 2676 public List<Size> getSupportedPictureSizes() { 2677 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2678 return splitSize(str); 2679 } 2680 2681 /** 2682 * Sets the image format for pictures. 2683 * 2684 * @param pixel_format the desired picture format 2685 * (<var>ImageFormat.NV21</var>, 2686 * <var>ImageFormat.RGB_565</var>, or 2687 * <var>ImageFormat.JPEG</var>) 2688 * @see android.graphics.ImageFormat 2689 */ 2690 public void setPictureFormat(int pixel_format) { 2691 String s = cameraFormatForPixelFormat(pixel_format); 2692 if (s == null) { 2693 throw new IllegalArgumentException( 2694 "Invalid pixel_format=" + pixel_format); 2695 } 2696 2697 set(KEY_PICTURE_FORMAT, s); 2698 } 2699 2700 /** 2701 * Returns the image format for pictures. 2702 * 2703 * @return the picture format 2704 * @see android.graphics.ImageFormat 2705 */ 2706 public int getPictureFormat() { 2707 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2708 } 2709 2710 /** 2711 * Gets the supported picture formats. 2712 * 2713 * @return supported picture formats. This method will always return a 2714 * list with at least one element. 2715 * @see android.graphics.ImageFormat 2716 */ 2717 public List<Integer> getSupportedPictureFormats() { 2718 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2719 ArrayList<Integer> formats = new ArrayList<Integer>(); 2720 for (String s : split(str)) { 2721 int f = pixelFormatForCameraFormat(s); 2722 if (f == ImageFormat.UNKNOWN) continue; 2723 formats.add(f); 2724 } 2725 return formats; 2726 } 2727 2728 private String cameraFormatForPixelFormat(int pixel_format) { 2729 switch(pixel_format) { 2730 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2731 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2732 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2733 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2734 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2735 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2736 case ImageFormat.BAYER_RGGB: return PIXEL_FORMAT_BAYER_RGGB; 2737 default: return null; 2738 } 2739 } 2740 2741 private int pixelFormatForCameraFormat(String format) { 2742 if (format == null) 2743 return ImageFormat.UNKNOWN; 2744 2745 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2746 return ImageFormat.NV16; 2747 2748 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2749 return ImageFormat.NV21; 2750 2751 if (format.equals(PIXEL_FORMAT_YUV422I)) 2752 return ImageFormat.YUY2; 2753 2754 if (format.equals(PIXEL_FORMAT_YUV420P)) 2755 return ImageFormat.YV12; 2756 2757 if (format.equals(PIXEL_FORMAT_RGB565)) 2758 return ImageFormat.RGB_565; 2759 2760 if (format.equals(PIXEL_FORMAT_JPEG)) 2761 return ImageFormat.JPEG; 2762 2763 return ImageFormat.UNKNOWN; 2764 } 2765 2766 /** 2767 * Sets the clockwise rotation angle in degrees relative to the 2768 * orientation of the camera. This affects the pictures returned from 2769 * JPEG {@link PictureCallback}. The camera driver may set orientation 2770 * in the EXIF header without rotating the picture. Or the driver may 2771 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 2772 * rotated, the orientation in the EXIF header will be missing or 1 (row 2773 * #0 is top and column #0 is left side). 2774 * 2775 * <p> 2776 * If applications want to rotate the picture to match the orientation 2777 * of what users see, apps should use 2778 * {@link android.view.OrientationEventListener} and 2779 * {@link android.hardware.Camera.CameraInfo}. The value from 2780 * OrientationEventListener is relative to the natural orientation of 2781 * the device. CameraInfo.orientation is the angle between camera 2782 * orientation and natural device orientation. The sum of the two is the 2783 * rotation angle for back-facing camera. The difference of the two is 2784 * the rotation angle for front-facing camera. Note that the JPEG 2785 * pictures of front-facing cameras are not mirrored as in preview 2786 * display. 2787 * 2788 * <p> 2789 * For example, suppose the natural orientation of the device is 2790 * portrait. The device is rotated 270 degrees clockwise, so the device 2791 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2792 * landscape and the top side of the camera sensor is aligned with the 2793 * right edge of the display in natural orientation. So the camera 2794 * orientation is 90. The rotation should be set to 0 (270 + 90). 2795 * 2796 * <p>The reference code is as follows. 2797 * 2798 * <pre> 2799 * public void onOrientationChanged(int orientation) { 2800 * if (orientation == ORIENTATION_UNKNOWN) return; 2801 * android.hardware.Camera.CameraInfo info = 2802 * new android.hardware.Camera.CameraInfo(); 2803 * android.hardware.Camera.getCameraInfo(cameraId, info); 2804 * orientation = (orientation + 45) / 90 * 90; 2805 * int rotation = 0; 2806 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2807 * rotation = (info.orientation - orientation + 360) % 360; 2808 * } else { // back-facing camera 2809 * rotation = (info.orientation + orientation) % 360; 2810 * } 2811 * mParameters.setRotation(rotation); 2812 * } 2813 * </pre> 2814 * 2815 * @param rotation The rotation angle in degrees relative to the 2816 * orientation of the camera. Rotation can only be 0, 2817 * 90, 180 or 270. 2818 * @throws IllegalArgumentException if rotation value is invalid. 2819 * @see android.view.OrientationEventListener 2820 * @see #getCameraInfo(int, CameraInfo) 2821 */ 2822 public void setRotation(int rotation) { 2823 if (rotation == 0 || rotation == 90 || rotation == 180 2824 || rotation == 270) { 2825 set(KEY_ROTATION, Integer.toString(rotation)); 2826 } else { 2827 throw new IllegalArgumentException( 2828 "Invalid rotation=" + rotation); 2829 } 2830 } 2831 2832 /** 2833 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2834 * header. 2835 * 2836 * @param latitude GPS latitude coordinate. 2837 */ 2838 public void setGpsLatitude(double latitude) { 2839 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2840 } 2841 2842 /** 2843 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2844 * header. 2845 * 2846 * @param longitude GPS longitude coordinate. 2847 */ 2848 public void setGpsLongitude(double longitude) { 2849 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2850 } 2851 2852 /** 2853 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2854 * 2855 * @param altitude GPS altitude in meters. 2856 */ 2857 public void setGpsAltitude(double altitude) { 2858 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2859 } 2860 2861 /** 2862 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2863 * 2864 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2865 * 1970). 2866 */ 2867 public void setGpsTimestamp(long timestamp) { 2868 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2869 } 2870 2871 /** 2872 * Sets GPS processing method. It will store up to 32 characters 2873 * in JPEG EXIF header. 2874 * 2875 * @param processing_method The processing method to get this location. 2876 */ 2877 public void setGpsProcessingMethod(String processing_method) { 2878 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2879 } 2880 2881 /** 2882 * Removes GPS latitude, longitude, altitude, and timestamp from the 2883 * parameters. 2884 */ 2885 public void removeGpsData() { 2886 remove(KEY_GPS_LATITUDE); 2887 remove(KEY_GPS_LONGITUDE); 2888 remove(KEY_GPS_ALTITUDE); 2889 remove(KEY_GPS_TIMESTAMP); 2890 remove(KEY_GPS_PROCESSING_METHOD); 2891 } 2892 2893 /** 2894 * Gets the current white balance setting. 2895 * 2896 * @return current white balance. null if white balance setting is not 2897 * supported. 2898 * @see #WHITE_BALANCE_AUTO 2899 * @see #WHITE_BALANCE_INCANDESCENT 2900 * @see #WHITE_BALANCE_FLUORESCENT 2901 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2902 * @see #WHITE_BALANCE_DAYLIGHT 2903 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2904 * @see #WHITE_BALANCE_TWILIGHT 2905 * @see #WHITE_BALANCE_SHADE 2906 * 2907 */ 2908 public String getWhiteBalance() { 2909 return get(KEY_WHITE_BALANCE); 2910 } 2911 2912 /** 2913 * Sets the white balance. Changing the setting will release the 2914 * auto-white balance lock. It is recommended not to change white 2915 * balance and AWB lock at the same time. 2916 * 2917 * @param value new white balance. 2918 * @see #getWhiteBalance() 2919 * @see #setAutoWhiteBalanceLock(boolean) 2920 */ 2921 public void setWhiteBalance(String value) { 2922 String oldValue = get(KEY_WHITE_BALANCE); 2923 if (same(value, oldValue)) return; 2924 set(KEY_WHITE_BALANCE, value); 2925 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 2926 } 2927 2928 /** 2929 * Gets the supported white balance. 2930 * 2931 * @return a list of supported white balance. null if white balance 2932 * setting is not supported. 2933 * @see #getWhiteBalance() 2934 */ 2935 public List<String> getSupportedWhiteBalance() { 2936 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2937 return split(str); 2938 } 2939 2940 /** 2941 * Gets the current color effect setting. 2942 * 2943 * @return current color effect. null if color effect 2944 * setting is not supported. 2945 * @see #EFFECT_NONE 2946 * @see #EFFECT_MONO 2947 * @see #EFFECT_NEGATIVE 2948 * @see #EFFECT_SOLARIZE 2949 * @see #EFFECT_SEPIA 2950 * @see #EFFECT_POSTERIZE 2951 * @see #EFFECT_WHITEBOARD 2952 * @see #EFFECT_BLACKBOARD 2953 * @see #EFFECT_AQUA 2954 */ 2955 public String getColorEffect() { 2956 return get(KEY_EFFECT); 2957 } 2958 2959 /** 2960 * Sets the current color effect setting. 2961 * 2962 * @param value new color effect. 2963 * @see #getColorEffect() 2964 */ 2965 public void setColorEffect(String value) { 2966 set(KEY_EFFECT, value); 2967 } 2968 2969 /** 2970 * Gets the supported color effects. 2971 * 2972 * @return a list of supported color effects. null if color effect 2973 * setting is not supported. 2974 * @see #getColorEffect() 2975 */ 2976 public List<String> getSupportedColorEffects() { 2977 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2978 return split(str); 2979 } 2980 2981 2982 /** 2983 * Gets the current antibanding setting. 2984 * 2985 * @return current antibanding. null if antibanding setting is not 2986 * supported. 2987 * @see #ANTIBANDING_AUTO 2988 * @see #ANTIBANDING_50HZ 2989 * @see #ANTIBANDING_60HZ 2990 * @see #ANTIBANDING_OFF 2991 */ 2992 public String getAntibanding() { 2993 return get(KEY_ANTIBANDING); 2994 } 2995 2996 /** 2997 * Sets the antibanding. 2998 * 2999 * @param antibanding new antibanding value. 3000 * @see #getAntibanding() 3001 */ 3002 public void setAntibanding(String antibanding) { 3003 set(KEY_ANTIBANDING, antibanding); 3004 } 3005 3006 /** 3007 * Gets the supported antibanding values. 3008 * 3009 * @return a list of supported antibanding values. null if antibanding 3010 * setting is not supported. 3011 * @see #getAntibanding() 3012 */ 3013 public List<String> getSupportedAntibanding() { 3014 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 3015 return split(str); 3016 } 3017 3018 /** 3019 * Gets the current scene mode setting. 3020 * 3021 * @return one of SCENE_MODE_XXX string constant. null if scene mode 3022 * setting is not supported. 3023 * @see #SCENE_MODE_AUTO 3024 * @see #SCENE_MODE_ACTION 3025 * @see #SCENE_MODE_PORTRAIT 3026 * @see #SCENE_MODE_LANDSCAPE 3027 * @see #SCENE_MODE_NIGHT 3028 * @see #SCENE_MODE_NIGHT_PORTRAIT 3029 * @see #SCENE_MODE_THEATRE 3030 * @see #SCENE_MODE_BEACH 3031 * @see #SCENE_MODE_SNOW 3032 * @see #SCENE_MODE_SUNSET 3033 * @see #SCENE_MODE_STEADYPHOTO 3034 * @see #SCENE_MODE_FIREWORKS 3035 * @see #SCENE_MODE_SPORTS 3036 * @see #SCENE_MODE_PARTY 3037 * @see #SCENE_MODE_CANDLELIGHT 3038 * @see #SCENE_MODE_BARCODE 3039 */ 3040 public String getSceneMode() { 3041 return get(KEY_SCENE_MODE); 3042 } 3043 3044 /** 3045 * Sets the scene mode. Changing scene mode may override other 3046 * parameters (such as flash mode, focus mode, white balance). For 3047 * example, suppose originally flash mode is on and supported flash 3048 * modes are on/off. In night scene mode, both flash mode and supported 3049 * flash mode may be changed to off. After setting scene mode, 3050 * applications should call getParameters to know if some parameters are 3051 * changed. 3052 * 3053 * @param value scene mode. 3054 * @see #getSceneMode() 3055 */ 3056 public void setSceneMode(String value) { 3057 set(KEY_SCENE_MODE, value); 3058 } 3059 3060 /** 3061 * Gets the supported scene modes. 3062 * 3063 * @return a list of supported scene modes. null if scene mode setting 3064 * is not supported. 3065 * @see #getSceneMode() 3066 */ 3067 public List<String> getSupportedSceneModes() { 3068 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 3069 return split(str); 3070 } 3071 3072 /** 3073 * Gets the current flash mode setting. 3074 * 3075 * @return current flash mode. null if flash mode setting is not 3076 * supported. 3077 * @see #FLASH_MODE_OFF 3078 * @see #FLASH_MODE_AUTO 3079 * @see #FLASH_MODE_ON 3080 * @see #FLASH_MODE_RED_EYE 3081 * @see #FLASH_MODE_TORCH 3082 */ 3083 public String getFlashMode() { 3084 return get(KEY_FLASH_MODE); 3085 } 3086 3087 /** 3088 * Sets the flash mode. 3089 * 3090 * @param value flash mode. 3091 * @see #getFlashMode() 3092 */ 3093 public void setFlashMode(String value) { 3094 set(KEY_FLASH_MODE, value); 3095 } 3096 3097 /** 3098 * Gets the supported flash modes. 3099 * 3100 * @return a list of supported flash modes. null if flash mode setting 3101 * is not supported. 3102 * @see #getFlashMode() 3103 */ 3104 public List<String> getSupportedFlashModes() { 3105 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 3106 return split(str); 3107 } 3108 3109 /** 3110 * Gets the current focus mode setting. 3111 * 3112 * @return current focus mode. This method will always return a non-null 3113 * value. Applications should call {@link 3114 * #autoFocus(AutoFocusCallback)} to start the focus if focus 3115 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 3116 * @see #FOCUS_MODE_AUTO 3117 * @see #FOCUS_MODE_INFINITY 3118 * @see #FOCUS_MODE_MACRO 3119 * @see #FOCUS_MODE_FIXED 3120 * @see #FOCUS_MODE_EDOF 3121 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 3122 */ 3123 public String getFocusMode() { 3124 return get(KEY_FOCUS_MODE); 3125 } 3126 3127 /** 3128 * Sets the focus mode. 3129 * 3130 * @param value focus mode. 3131 * @see #getFocusMode() 3132 */ 3133 public void setFocusMode(String value) { 3134 set(KEY_FOCUS_MODE, value); 3135 } 3136 3137 /** 3138 * Gets the supported focus modes. 3139 * 3140 * @return a list of supported focus modes. This method will always 3141 * return a list with at least one element. 3142 * @see #getFocusMode() 3143 */ 3144 public List<String> getSupportedFocusModes() { 3145 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 3146 return split(str); 3147 } 3148 3149 /** 3150 * Gets the focal length (in millimeter) of the camera. 3151 * 3152 * @return the focal length. This method will always return a valid 3153 * value. 3154 */ 3155 public float getFocalLength() { 3156 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 3157 } 3158 3159 /** 3160 * Gets the horizontal angle of view in degrees. 3161 * 3162 * @return horizontal angle of view. This method will always return a 3163 * valid value. 3164 */ 3165 public float getHorizontalViewAngle() { 3166 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 3167 } 3168 3169 /** 3170 * Gets the vertical angle of view in degrees. 3171 * 3172 * @return vertical angle of view. This method will always return a 3173 * valid value. 3174 */ 3175 public float getVerticalViewAngle() { 3176 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 3177 } 3178 3179 /** 3180 * Gets the current exposure compensation index. 3181 * 3182 * @return current exposure compensation index. The range is {@link 3183 * #getMinExposureCompensation} to {@link 3184 * #getMaxExposureCompensation}. 0 means exposure is not 3185 * adjusted. 3186 */ 3187 public int getExposureCompensation() { 3188 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 3189 } 3190 3191 /** 3192 * Sets the exposure compensation index. 3193 * 3194 * @param value exposure compensation index. The valid value range is 3195 * from {@link #getMinExposureCompensation} (inclusive) to {@link 3196 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 3197 * not adjusted. Application should call 3198 * getMinExposureCompensation and getMaxExposureCompensation to 3199 * know if exposure compensation is supported. 3200 */ 3201 public void setExposureCompensation(int value) { 3202 set(KEY_EXPOSURE_COMPENSATION, value); 3203 } 3204 3205 /** 3206 * Gets the maximum exposure compensation index. 3207 * 3208 * @return maximum exposure compensation index (>=0). If both this 3209 * method and {@link #getMinExposureCompensation} return 0, 3210 * exposure compensation is not supported. 3211 */ 3212 public int getMaxExposureCompensation() { 3213 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 3214 } 3215 3216 /** 3217 * Gets the minimum exposure compensation index. 3218 * 3219 * @return minimum exposure compensation index (<=0). If both this 3220 * method and {@link #getMaxExposureCompensation} return 0, 3221 * exposure compensation is not supported. 3222 */ 3223 public int getMinExposureCompensation() { 3224 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 3225 } 3226 3227 /** 3228 * Gets the exposure compensation step. 3229 * 3230 * @return exposure compensation step. Applications can get EV by 3231 * multiplying the exposure compensation index and step. Ex: if 3232 * exposure compensation index is -6 and step is 0.333333333, EV 3233 * is -2. 3234 */ 3235 public float getExposureCompensationStep() { 3236 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 3237 } 3238 3239 /** 3240 * <p>Sets the auto-exposure lock state. Applications should check 3241 * {@link #isAutoExposureLockSupported} before using this method.</p> 3242 * 3243 * <p>If set to true, the camera auto-exposure routine will immediately 3244 * pause until the lock is set to false. Exposure compensation settings 3245 * changes will still take effect while auto-exposure is locked.</p> 3246 * 3247 * <p>If auto-exposure is already locked, setting this to true again has 3248 * no effect (the driver will not recalculate exposure values).</p> 3249 * 3250 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3251 * image capture with {@link #takePicture(Camera.ShutterCallback, 3252 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3253 * lock.</p> 3254 * 3255 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 3256 * lock can be used to capture an exposure-bracketed burst of images, 3257 * for example.</p> 3258 * 3259 * <p>Auto-exposure state, including the lock state, will not be 3260 * maintained after camera {@link #release()} is called. Locking 3261 * auto-exposure after {@link #open()} but before the first call to 3262 * {@link #startPreview()} will not allow the auto-exposure routine to 3263 * run at all, and may result in severely over- or under-exposed 3264 * images.</p> 3265 * 3266 * @param toggle new state of the auto-exposure lock. True means that 3267 * auto-exposure is locked, false means that the auto-exposure 3268 * routine is free to run normally. 3269 * 3270 * @see #getAutoExposureLock() 3271 */ 3272 public void setAutoExposureLock(boolean toggle) { 3273 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 3274 } 3275 3276 /** 3277 * Gets the state of the auto-exposure lock. Applications should check 3278 * {@link #isAutoExposureLockSupported} before using this method. See 3279 * {@link #setAutoExposureLock} for details about the lock. 3280 * 3281 * @return State of the auto-exposure lock. Returns true if 3282 * auto-exposure is currently locked, and false otherwise. 3283 * 3284 * @see #setAutoExposureLock(boolean) 3285 * 3286 */ 3287 public boolean getAutoExposureLock() { 3288 String str = get(KEY_AUTO_EXPOSURE_LOCK); 3289 return TRUE.equals(str); 3290 } 3291 3292 /** 3293 * Returns true if auto-exposure locking is supported. Applications 3294 * should call this before trying to lock auto-exposure. See 3295 * {@link #setAutoExposureLock} for details about the lock. 3296 * 3297 * @return true if auto-exposure lock is supported. 3298 * @see #setAutoExposureLock(boolean) 3299 * 3300 */ 3301 public boolean isAutoExposureLockSupported() { 3302 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 3303 return TRUE.equals(str); 3304 } 3305 3306 /** 3307 * <p>Sets the auto-white balance lock state. Applications should check 3308 * {@link #isAutoWhiteBalanceLockSupported} before using this 3309 * method.</p> 3310 * 3311 * <p>If set to true, the camera auto-white balance routine will 3312 * immediately pause until the lock is set to false.</p> 3313 * 3314 * <p>If auto-white balance is already locked, setting this to true 3315 * again has no effect (the driver will not recalculate white balance 3316 * values).</p> 3317 * 3318 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3319 * image capture with {@link #takePicture(Camera.ShutterCallback, 3320 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3321 * the lock.</p> 3322 * 3323 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3324 * will release the auto-white balance lock if it is set.</p> 3325 * 3326 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3327 * capture an exposure-bracketed burst of images, for example. 3328 * Auto-white balance state, including the lock state, will not be 3329 * maintained after camera {@link #release()} is called. Locking 3330 * auto-white balance after {@link #open()} but before the first call to 3331 * {@link #startPreview()} will not allow the auto-white balance routine 3332 * to run at all, and may result in severely incorrect color in captured 3333 * images.</p> 3334 * 3335 * @param toggle new state of the auto-white balance lock. True means 3336 * that auto-white balance is locked, false means that the 3337 * auto-white balance routine is free to run normally. 3338 * 3339 * @see #getAutoWhiteBalanceLock() 3340 * @see #setWhiteBalance(String) 3341 */ 3342 public void setAutoWhiteBalanceLock(boolean toggle) { 3343 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3344 } 3345 3346 /** 3347 * Gets the state of the auto-white balance lock. Applications should 3348 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3349 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3350 * lock. 3351 * 3352 * @return State of the auto-white balance lock. Returns true if 3353 * auto-white balance is currently locked, and false 3354 * otherwise. 3355 * 3356 * @see #setAutoWhiteBalanceLock(boolean) 3357 * 3358 */ 3359 public boolean getAutoWhiteBalanceLock() { 3360 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3361 return TRUE.equals(str); 3362 } 3363 3364 /** 3365 * Returns true if auto-white balance locking is supported. Applications 3366 * should call this before trying to lock auto-white balance. See 3367 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3368 * 3369 * @return true if auto-white balance lock is supported. 3370 * @see #setAutoWhiteBalanceLock(boolean) 3371 * 3372 */ 3373 public boolean isAutoWhiteBalanceLockSupported() { 3374 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3375 return TRUE.equals(str); 3376 } 3377 3378 /** 3379 * Gets current zoom value. This also works when smooth zoom is in 3380 * progress. Applications should check {@link #isZoomSupported} before 3381 * using this method. 3382 * 3383 * @return the current zoom value. The range is 0 to {@link 3384 * #getMaxZoom}. 0 means the camera is not zoomed. 3385 */ 3386 public int getZoom() { 3387 return getInt(KEY_ZOOM, 0); 3388 } 3389 3390 /** 3391 * Sets current zoom value. If the camera is zoomed (value > 0), the 3392 * actual picture size may be smaller than picture size setting. 3393 * Applications can check the actual picture size after picture is 3394 * returned from {@link PictureCallback}. The preview size remains the 3395 * same in zoom. Applications should check {@link #isZoomSupported} 3396 * before using this method. 3397 * 3398 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3399 */ 3400 public void setZoom(int value) { 3401 set(KEY_ZOOM, value); 3402 } 3403 3404 /** 3405 * Returns true if zoom is supported. Applications should call this 3406 * before using other zoom methods. 3407 * 3408 * @return true if zoom is supported. 3409 */ 3410 public boolean isZoomSupported() { 3411 String str = get(KEY_ZOOM_SUPPORTED); 3412 return TRUE.equals(str); 3413 } 3414 3415 /** 3416 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3417 * value that applications can set to {@link #setZoom(int)}. 3418 * Applications should call {@link #isZoomSupported} before using this 3419 * method. This value may change in different preview size. Applications 3420 * should call this again after setting preview size. 3421 * 3422 * @return the maximum zoom value supported by the camera. 3423 */ 3424 public int getMaxZoom() { 3425 return getInt(KEY_MAX_ZOOM, 0); 3426 } 3427 3428 /** 3429 * Gets the zoom ratios of all zoom values. Applications should check 3430 * {@link #isZoomSupported} before using this method. 3431 * 3432 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3433 * returned as 320. The number of elements is {@link 3434 * #getMaxZoom} + 1. The list is sorted from small to large. The 3435 * first element is always 100. The last element is the zoom 3436 * ratio of the maximum zoom value. 3437 */ 3438 public List<Integer> getZoomRatios() { 3439 return splitInt(get(KEY_ZOOM_RATIOS)); 3440 } 3441 3442 /** 3443 * Returns true if smooth zoom is supported. Applications should call 3444 * this before using other smooth zoom methods. 3445 * 3446 * @return true if smooth zoom is supported. 3447 */ 3448 public boolean isSmoothZoomSupported() { 3449 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3450 return TRUE.equals(str); 3451 } 3452 3453 /** 3454 * <p>Gets the distances from the camera to where an object appears to be 3455 * in focus. The object is sharpest at the optimal focus distance. The 3456 * depth of field is the far focus distance minus near focus distance.</p> 3457 * 3458 * <p>Focus distances may change after calling {@link 3459 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3460 * #startPreview()}. Applications can call {@link #getParameters()} 3461 * and this method anytime to get the latest focus distances. If the 3462 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3463 * from time to time.</p> 3464 * 3465 * <p>This method is intended to estimate the distance between the camera 3466 * and the subject. After autofocus, the subject distance may be within 3467 * near and far focus distance. However, the precision depends on the 3468 * camera hardware, autofocus algorithm, the focus area, and the scene. 3469 * The error can be large and it should be only used as a reference.</p> 3470 * 3471 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3472 * If the focus distance is infinity, the value will be 3473 * {@code Float.POSITIVE_INFINITY}.</p> 3474 * 3475 * @param output focus distances in meters. output must be a float 3476 * array with three elements. Near focus distance, optimal focus 3477 * distance, and far focus distance will be filled in the array. 3478 * @see #FOCUS_DISTANCE_NEAR_INDEX 3479 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3480 * @see #FOCUS_DISTANCE_FAR_INDEX 3481 */ 3482 public void getFocusDistances(float[] output) { 3483 if (output == null || output.length != 3) { 3484 throw new IllegalArgumentException( 3485 "output must be a float array with three elements."); 3486 } 3487 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3488 } 3489 3490 /** 3491 * Gets the maximum number of focus areas supported. This is the maximum 3492 * length of the list in {@link #setFocusAreas(List)} and 3493 * {@link #getFocusAreas()}. 3494 * 3495 * @return the maximum number of focus areas supported by the camera. 3496 * @see #getFocusAreas() 3497 */ 3498 public int getMaxNumFocusAreas() { 3499 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3500 } 3501 3502 /** 3503 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3504 * focus.</p> 3505 * 3506 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3507 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3508 * focus areas first. If the value is 0, focus area is not supported.</p> 3509 * 3510 * <p>Each focus area is a rectangle with specified weight. The direction 3511 * is relative to the sensor orientation, that is, what the sensor sees. 3512 * The direction is not affected by the rotation or mirroring of 3513 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3514 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3515 * (1000, 1000) is the lower right point. The width and height of focus 3516 * areas cannot be 0 or negative.</p> 3517 * 3518 * <p>The weight must range from 1 to 1000. The weight should be 3519 * interpreted as a per-pixel weight - all pixels in the area have the 3520 * specified weight. This means a small area with the same weight as a 3521 * larger area will have less influence on the focusing than the larger 3522 * area. Focus areas can partially overlap and the driver will add the 3523 * weights in the overlap region.</p> 3524 * 3525 * <p>A special case of a {@code null} focus area list means the driver is 3526 * free to select focus targets as it wants. For example, the driver may 3527 * use more signals to select focus areas and change them 3528 * dynamically. Apps can set the focus area list to {@code null} if they 3529 * want the driver to completely control focusing.</p> 3530 * 3531 * <p>Focus areas are relative to the current field of view 3532 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3533 * represents the top of the currently visible camera frame. The focus 3534 * area cannot be set to be outside the current field of view, even 3535 * when using zoom.</p> 3536 * 3537 * <p>Focus area only has effect if the current focus mode is 3538 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3539 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3540 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3541 * 3542 * @return a list of current focus areas 3543 */ 3544 public List<Area> getFocusAreas() { 3545 return splitArea(get(KEY_FOCUS_AREAS)); 3546 } 3547 3548 /** 3549 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3550 * 3551 * @param focusAreas the focus areas 3552 * @see #getFocusAreas() 3553 */ 3554 public void setFocusAreas(List<Area> focusAreas) { 3555 set(KEY_FOCUS_AREAS, focusAreas); 3556 } 3557 3558 /** 3559 * Gets the maximum number of metering areas supported. This is the 3560 * maximum length of the list in {@link #setMeteringAreas(List)} and 3561 * {@link #getMeteringAreas()}. 3562 * 3563 * @return the maximum number of metering areas supported by the camera. 3564 * @see #getMeteringAreas() 3565 */ 3566 public int getMaxNumMeteringAreas() { 3567 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3568 } 3569 3570 /** 3571 * <p>Gets the current metering areas. Camera driver uses these areas to 3572 * decide exposure.</p> 3573 * 3574 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3575 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3576 * metering areas first. If the value is 0, metering area is not 3577 * supported.</p> 3578 * 3579 * <p>Each metering area is a rectangle with specified weight. The 3580 * direction is relative to the sensor orientation, that is, what the 3581 * sensor sees. The direction is not affected by the rotation or 3582 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3583 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3584 * point. (1000, 1000) is the lower right point. The width and height of 3585 * metering areas cannot be 0 or negative.</p> 3586 * 3587 * <p>The weight must range from 1 to 1000, and represents a weight for 3588 * every pixel in the area. This means that a large metering area with 3589 * the same weight as a smaller area will have more effect in the 3590 * metering result. Metering areas can partially overlap and the driver 3591 * will add the weights in the overlap region.</p> 3592 * 3593 * <p>A special case of a {@code null} metering area list means the driver 3594 * is free to meter as it chooses. For example, the driver may use more 3595 * signals to select metering areas and change them dynamically. Apps 3596 * can set the metering area list to {@code null} if they want the 3597 * driver to completely control metering.</p> 3598 * 3599 * <p>Metering areas are relative to the current field of view 3600 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3601 * represents the top of the currently visible camera frame. The 3602 * metering area cannot be set to be outside the current field of view, 3603 * even when using zoom.</p> 3604 * 3605 * <p>No matter what metering areas are, the final exposure are compensated 3606 * by {@link #setExposureCompensation(int)}.</p> 3607 * 3608 * @return a list of current metering areas 3609 */ 3610 public List<Area> getMeteringAreas() { 3611 return splitArea(get(KEY_METERING_AREAS)); 3612 } 3613 3614 /** 3615 * Sets metering areas. See {@link #getMeteringAreas()} for 3616 * documentation. 3617 * 3618 * @param meteringAreas the metering areas 3619 * @see #getMeteringAreas() 3620 */ 3621 public void setMeteringAreas(List<Area> meteringAreas) { 3622 set(KEY_METERING_AREAS, meteringAreas); 3623 } 3624 3625 /** 3626 * Gets the maximum number of detected faces supported. This is the 3627 * maximum length of the list returned from {@link FaceDetectionListener}. 3628 * If the return value is 0, face detection of the specified type is not 3629 * supported. 3630 * 3631 * @return the maximum number of detected face supported by the camera. 3632 * @see #startFaceDetection() 3633 */ 3634 public int getMaxNumDetectedFaces() { 3635 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3636 } 3637 3638 /** 3639 * Sets recording mode hint. This tells the camera that the intent of 3640 * the application is to record videos {@link 3641 * android.media.MediaRecorder#start()}, not to take still pictures 3642 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3643 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3644 * allow MediaRecorder.start() to start faster or with fewer glitches on 3645 * output. This should be called before starting preview for the best 3646 * result, but can be changed while the preview is active. The default 3647 * value is false. 3648 * 3649 * The app can still call takePicture() when the hint is true or call 3650 * MediaRecorder.start() when the hint is false. But the performance may 3651 * be worse. 3652 * 3653 * @param hint true if the apps intend to record videos using 3654 * {@link android.media.MediaRecorder}. 3655 */ 3656 public void setRecordingHint(boolean hint) { 3657 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3658 } 3659 3660 /** 3661 * <p>Returns true if video snapshot is supported. That is, applications 3662 * can call {@link #takePicture(Camera.ShutterCallback, 3663 * Camera.PictureCallback, Camera.PictureCallback, 3664 * Camera.PictureCallback)} during recording. Applications do not need 3665 * to call {@link #startPreview()} after taking a picture. The preview 3666 * will be still active. Other than that, taking a picture during 3667 * recording is identical to taking a picture normally. All settings and 3668 * methods related to takePicture work identically. Ex: 3669 * {@link #getPictureSize()}, {@link #getSupportedPictureSizes()}, 3670 * {@link #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 3671 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and 3672 * {@link #FLASH_MODE_ON} also still work, but the video will record the 3673 * flash.</p> 3674 * 3675 * <p>Applications can set shutter callback as null to avoid the shutter 3676 * sound. It is also recommended to set raw picture and post view 3677 * callbacks to null to avoid the interrupt of preview display.</p> 3678 * 3679 * <p>Field-of-view of the recorded video may be different from that of the 3680 * captured pictures. The maximum size of a video snapshot may be 3681 * smaller than that for regular still captures. If the current picture 3682 * size is set higher than can be supported by video snapshot, the 3683 * picture will be captured at the maximum supported size instead.</p> 3684 * 3685 * @return true if video snapshot is supported. 3686 */ 3687 public boolean isVideoSnapshotSupported() { 3688 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 3689 return TRUE.equals(str); 3690 } 3691 3692 /** 3693 * <p>Enables and disables video stabilization. Use 3694 * {@link #isVideoStabilizationSupported} to determine if calling this 3695 * method is valid.</p> 3696 * 3697 * <p>Video stabilization reduces the shaking due to the motion of the 3698 * camera in both the preview stream and in recorded videos, including 3699 * data received from the preview callback. It does not reduce motion 3700 * blur in images captured with 3701 * {@link Camera#takePicture takePicture}.</p> 3702 * 3703 * <p>Video stabilization can be enabled and disabled while preview or 3704 * recording is active, but toggling it may cause a jump in the video 3705 * stream that may be undesirable in a recorded video.</p> 3706 * 3707 * @param toggle Set to true to enable video stabilization, and false to 3708 * disable video stabilization. 3709 * @see #isVideoStabilizationSupported() 3710 * @see #getVideoStabilization() 3711 */ 3712 public void setVideoStabilization(boolean toggle) { 3713 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 3714 } 3715 3716 /** 3717 * Get the current state of video stabilization. See 3718 * {@link #setVideoStabilization} for details of video stabilization. 3719 * 3720 * @return true if video stabilization is enabled 3721 * @see #isVideoStabilizationSupported() 3722 * @see #setVideoStabilization(boolean) 3723 */ 3724 public boolean getVideoStabilization() { 3725 String str = get(KEY_VIDEO_STABILIZATION); 3726 return TRUE.equals(str); 3727 } 3728 3729 /** 3730 * Returns true if video stabilization is supported. See 3731 * {@link #setVideoStabilization} for details of video stabilization. 3732 * 3733 * @return true if video stabilization is supported 3734 * @see #setVideoStabilization(boolean) 3735 * @see #getVideoStabilization() 3736 */ 3737 public boolean isVideoStabilizationSupported() { 3738 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 3739 return TRUE.equals(str); 3740 } 3741 3742 // Splits a comma delimited string to an ArrayList of String. 3743 // Return null if the passing string is null or the size is 0. 3744 private ArrayList<String> split(String str) { 3745 if (str == null) return null; 3746 3747 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3748 splitter.setString(str); 3749 ArrayList<String> substrings = new ArrayList<String>(); 3750 for (String s : splitter) { 3751 substrings.add(s); 3752 } 3753 return substrings; 3754 } 3755 3756 // Splits a comma delimited string to an ArrayList of Integer. 3757 // Return null if the passing string is null or the size is 0. 3758 private ArrayList<Integer> splitInt(String str) { 3759 if (str == null) return null; 3760 3761 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3762 splitter.setString(str); 3763 ArrayList<Integer> substrings = new ArrayList<Integer>(); 3764 for (String s : splitter) { 3765 substrings.add(Integer.parseInt(s)); 3766 } 3767 if (substrings.size() == 0) return null; 3768 return substrings; 3769 } 3770 3771 private void splitInt(String str, int[] output) { 3772 if (str == null) return; 3773 3774 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3775 splitter.setString(str); 3776 int index = 0; 3777 for (String s : splitter) { 3778 output[index++] = Integer.parseInt(s); 3779 } 3780 } 3781 3782 // Splits a comma delimited string to an ArrayList of Float. 3783 private void splitFloat(String str, float[] output) { 3784 if (str == null) return; 3785 3786 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3787 splitter.setString(str); 3788 int index = 0; 3789 for (String s : splitter) { 3790 output[index++] = Float.parseFloat(s); 3791 } 3792 } 3793 3794 // Returns the value of a float parameter. 3795 private float getFloat(String key, float defaultValue) { 3796 try { 3797 return Float.parseFloat(mMap.get(key)); 3798 } catch (NumberFormatException ex) { 3799 return defaultValue; 3800 } 3801 } 3802 3803 // Returns the value of a integer parameter. 3804 private int getInt(String key, int defaultValue) { 3805 try { 3806 return Integer.parseInt(mMap.get(key)); 3807 } catch (NumberFormatException ex) { 3808 return defaultValue; 3809 } 3810 } 3811 3812 // Splits a comma delimited string to an ArrayList of Size. 3813 // Return null if the passing string is null or the size is 0. 3814 private ArrayList<Size> splitSize(String str) { 3815 if (str == null) return null; 3816 3817 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3818 splitter.setString(str); 3819 ArrayList<Size> sizeList = new ArrayList<Size>(); 3820 for (String s : splitter) { 3821 Size size = strToSize(s); 3822 if (size != null) sizeList.add(size); 3823 } 3824 if (sizeList.size() == 0) return null; 3825 return sizeList; 3826 } 3827 3828 // Parses a string (ex: "480x320") to Size object. 3829 // Return null if the passing string is null. 3830 private Size strToSize(String str) { 3831 if (str == null) return null; 3832 3833 int pos = str.indexOf('x'); 3834 if (pos != -1) { 3835 String width = str.substring(0, pos); 3836 String height = str.substring(pos + 1); 3837 return new Size(Integer.parseInt(width), 3838 Integer.parseInt(height)); 3839 } 3840 Log.e(TAG, "Invalid size parameter string=" + str); 3841 return null; 3842 } 3843 3844 // Splits a comma delimited string to an ArrayList of int array. 3845 // Example string: "(10000,26623),(10000,30000)". Return null if the 3846 // passing string is null or the size is 0. 3847 private ArrayList<int[]> splitRange(String str) { 3848 if (str == null || str.charAt(0) != '(' 3849 || str.charAt(str.length() - 1) != ')') { 3850 Log.e(TAG, "Invalid range list string=" + str); 3851 return null; 3852 } 3853 3854 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3855 int endIndex, fromIndex = 1; 3856 do { 3857 int[] range = new int[2]; 3858 endIndex = str.indexOf("),(", fromIndex); 3859 if (endIndex == -1) endIndex = str.length() - 1; 3860 splitInt(str.substring(fromIndex, endIndex), range); 3861 rangeList.add(range); 3862 fromIndex = endIndex + 3; 3863 } while (endIndex != str.length() - 1); 3864 3865 if (rangeList.size() == 0) return null; 3866 return rangeList; 3867 } 3868 3869 // Splits a comma delimited string to an ArrayList of Area objects. 3870 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3871 // the passing string is null or the size is 0 or (0,0,0,0,0). 3872 private ArrayList<Area> splitArea(String str) { 3873 if (str == null || str.charAt(0) != '(' 3874 || str.charAt(str.length() - 1) != ')') { 3875 Log.e(TAG, "Invalid area string=" + str); 3876 return null; 3877 } 3878 3879 ArrayList<Area> result = new ArrayList<Area>(); 3880 int endIndex, fromIndex = 1; 3881 int[] array = new int[5]; 3882 do { 3883 endIndex = str.indexOf("),(", fromIndex); 3884 if (endIndex == -1) endIndex = str.length() - 1; 3885 splitInt(str.substring(fromIndex, endIndex), array); 3886 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3887 result.add(new Area(rect, array[4])); 3888 fromIndex = endIndex + 3; 3889 } while (endIndex != str.length() - 1); 3890 3891 if (result.size() == 0) return null; 3892 3893 if (result.size() == 1) { 3894 Area area = result.get(0); 3895 Rect rect = area.rect; 3896 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3897 && rect.bottom == 0 && area.weight == 0) { 3898 return null; 3899 } 3900 } 3901 3902 return result; 3903 } 3904 3905 private boolean same(String s1, String s2) { 3906 if (s1 == null && s2 == null) return true; 3907 if (s1 != null && s1.equals(s2)) return true; 3908 return false; 3909 } 3910 }; 3911} 3912