Camera.java revision 26274fae33b7b056cf5fe9fd6e823cae9e4ddae2
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 java.lang.ref.WeakReference; 20import java.util.ArrayList; 21import java.util.HashMap; 22import java.util.List; 23import java.util.StringTokenizer; 24import java.io.IOException; 25 26import android.util.Log; 27import android.view.Surface; 28import android.view.SurfaceHolder; 29import android.graphics.ImageFormat; 30import android.graphics.Rect; 31import android.graphics.SurfaceTexture; 32import android.os.Handler; 33import android.os.Looper; 34import android.os.Message; 35 36/** 37 * The Camera class is used to set image capture settings, start/stop preview, 38 * snap pictures, and retrieve frames for encoding for video. This class is a 39 * client for the Camera service, which manages the actual camera hardware. 40 * 41 * <p>To access the device camera, you must declare the 42 * {@link android.Manifest.permission#CAMERA} permission in your Android 43 * Manifest. Also be sure to include the 44 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 45 * manifest element to declare camera features used by your application. 46 * For example, if you use the camera and auto-focus feature, your Manifest 47 * should include the following:</p> 48 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 49 * <uses-feature android:name="android.hardware.camera" /> 50 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 51 * 52 * <p>To take pictures with this class, use the following steps:</p> 53 * 54 * <ol> 55 * <li>Obtain an instance of Camera from {@link #open(int)}. 56 * 57 * <li>Get existing (default) settings with {@link #getParameters()}. 58 * 59 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 60 * {@link #setParameters(Camera.Parameters)}. 61 * 62 * <li>If desired, call {@link #setDisplayOrientation(int)}. 63 * 64 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 65 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 66 * will be unable to start the preview. 67 * 68 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 69 * preview surface. Preview must be started before you can take a picture. 70 * 71 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 72 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 73 * capture a photo. Wait for the callbacks to provide the actual image data. 74 * 75 * <li>After taking a picture, preview display will have stopped. To take more 76 * photos, call {@link #startPreview()} again first. 77 * 78 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 79 * 80 * <li><b>Important:</b> Call {@link #release()} to release the camera for 81 * use by other applications. Applications should release the camera 82 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 83 * it in {@link android.app.Activity#onResume()}). 84 * </ol> 85 * 86 * <p>To quickly switch to video recording mode, use these steps:</p> 87 * 88 * <ol> 89 * <li>Obtain and initialize a Camera and start preview as described above. 90 * 91 * <li>Call {@link #unlock()} to allow the media process to access the camera. 92 * 93 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 94 * See {@link android.media.MediaRecorder} information about video recording. 95 * 96 * <li>When finished recording, call {@link #reconnect()} to re-acquire 97 * and re-lock the camera. 98 * 99 * <li>If desired, restart preview and take more photos or videos. 100 * 101 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 102 * </ol> 103 * 104 * <p>This class is not thread-safe, and is meant for use from one event thread. 105 * Most long-running operations (preview, focus, photo capture, etc) happen 106 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 107 * on the event thread {@link #open(int)} was called from. This class's methods 108 * must never be called from multiple threads at once.</p> 109 * 110 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 111 * may have different hardware specifications, such as megapixel ratings and 112 * auto-focus capabilities. In order for your application to be compatible with 113 * more devices, you should not make assumptions about the device camera 114 * specifications.</p> 115 */ 116public class Camera { 117 private static final String TAG = "Camera"; 118 119 // These match the enums in frameworks/base/include/camera/Camera.h 120 private static final int CAMERA_MSG_ERROR = 0x001; 121 private static final int CAMERA_MSG_SHUTTER = 0x002; 122 private static final int CAMERA_MSG_FOCUS = 0x004; 123 private static final int CAMERA_MSG_ZOOM = 0x008; 124 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 125 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 126 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 127 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 128 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 129 private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; 130 131 private int mNativeContext; // accessed by native methods 132 private EventHandler mEventHandler; 133 private ShutterCallback mShutterCallback; 134 private PictureCallback mRawImageCallback; 135 private PictureCallback mJpegCallback; 136 private PreviewCallback mPreviewCallback; 137 private PictureCallback mPostviewCallback; 138 private AutoFocusCallback mAutoFocusCallback; 139 private OnZoomChangeListener mZoomListener; 140 private ErrorCallback mErrorCallback; 141 private boolean mOneShot; 142 private boolean mWithBuffer; 143 144 /** 145 * Returns the number of physical cameras available on this device. 146 */ 147 public native static int getNumberOfCameras(); 148 149 /** 150 * Returns the information about a particular camera. 151 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 152 */ 153 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 154 155 /** 156 * Information about a camera 157 */ 158 public static class CameraInfo { 159 /** 160 * The facing of the camera is opposite to that of the screen. 161 */ 162 public static final int CAMERA_FACING_BACK = 0; 163 164 /** 165 * The facing of the camera is the same as that of the screen. 166 */ 167 public static final int CAMERA_FACING_FRONT = 1; 168 169 /** 170 * The direction that the camera faces to. It should be 171 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 172 */ 173 public int facing; 174 175 /** 176 * The orientation of the camera image. The value is the angle that the 177 * camera image needs to be rotated clockwise so it shows correctly on 178 * the display in its natural orientation. It should be 0, 90, 180, or 270. 179 * 180 * For example, suppose a device has a naturally tall screen. The 181 * back-facing camera sensor is mounted in landscape. You are looking at 182 * the screen. If the top side of the camera sensor is aligned with the 183 * right edge of the screen in natural orientation, the value should be 184 * 90. If the top side of a front-facing camera sensor is aligned with 185 * the right of the screen, the value should be 270. 186 * 187 * @see #setDisplayOrientation(int) 188 * @see Parameters#setRotation(int) 189 * @see Parameters#setPreviewSize(int, int) 190 * @see Parameters#setPictureSize(int, int) 191 * @see Parameters#setJpegThumbnailSize(int, int) 192 */ 193 public int orientation; 194 }; 195 196 /** 197 * Creates a new Camera object to access a particular hardware camera. 198 * 199 * <p>You must call {@link #release()} when you are done using the camera, 200 * otherwise it will remain locked and be unavailable to other applications. 201 * 202 * <p>Your application should only have one Camera object active at a time 203 * for a particular hardware camera. 204 * 205 * <p>Callbacks from other methods are delivered to the event loop of the 206 * thread which called open(). If this thread has no event loop, then 207 * callbacks are delivered to the main application event loop. If there 208 * is no main application event loop, callbacks are not delivered. 209 * 210 * <p class="caution"><b>Caution:</b> On some devices, this method may 211 * take a long time to complete. It is best to call this method from a 212 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 213 * blocking the main application UI thread. 214 * 215 * @param cameraId the hardware camera to access, between 0 and 216 * {@link #getNumberOfCameras()}-1. 217 * @return a new Camera object, connected, locked and ready for use. 218 * @throws RuntimeException if connection to the camera service fails (for 219 * example, if the camera is in use by another process). 220 */ 221 public static Camera open(int cameraId) { 222 return new Camera(cameraId); 223 } 224 225 /** 226 * Creates a new Camera object to access the first back-facing camera on the 227 * device. If the device does not have a back-facing camera, this returns 228 * null. 229 * @see #open(int) 230 */ 231 public static Camera open() { 232 int numberOfCameras = getNumberOfCameras(); 233 CameraInfo cameraInfo = new CameraInfo(); 234 for (int i = 0; i < numberOfCameras; i++) { 235 getCameraInfo(i, cameraInfo); 236 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 237 return new Camera(i); 238 } 239 } 240 return null; 241 } 242 243 Camera(int cameraId) { 244 mShutterCallback = null; 245 mRawImageCallback = null; 246 mJpegCallback = null; 247 mPreviewCallback = null; 248 mPostviewCallback = null; 249 mZoomListener = null; 250 251 Looper looper; 252 if ((looper = Looper.myLooper()) != null) { 253 mEventHandler = new EventHandler(this, looper); 254 } else if ((looper = Looper.getMainLooper()) != null) { 255 mEventHandler = new EventHandler(this, looper); 256 } else { 257 mEventHandler = null; 258 } 259 260 native_setup(new WeakReference<Camera>(this), cameraId); 261 } 262 263 protected void finalize() { 264 native_release(); 265 } 266 267 private native final void native_setup(Object camera_this, int cameraId); 268 private native final void native_release(); 269 270 271 /** 272 * Disconnects and releases the Camera object resources. 273 * 274 * <p>You must call this as soon as you're done with the Camera object.</p> 275 */ 276 public final void release() { 277 native_release(); 278 } 279 280 /** 281 * Unlocks the camera to allow another process to access it. 282 * Normally, the camera is locked to the process with an active Camera 283 * object until {@link #release()} is called. To allow rapid handoff 284 * between processes, you can call this method to release the camera 285 * temporarily for another process to use; once the other process is done 286 * you can call {@link #reconnect()} to reclaim the camera. 287 * 288 * <p>This must be done before calling 289 * {@link android.media.MediaRecorder#setCamera(Camera)}. 290 * 291 * <p>If you are not recording video, you probably do not need this method. 292 * 293 * @throws RuntimeException if the camera cannot be unlocked. 294 */ 295 public native final void unlock(); 296 297 /** 298 * Re-locks the camera to prevent other processes from accessing it. 299 * Camera objects are locked by default unless {@link #unlock()} is 300 * called. Normally {@link #reconnect()} is used instead. 301 * 302 * <p>If you are not recording video, you probably do not need this method. 303 * 304 * @throws RuntimeException if the camera cannot be re-locked (for 305 * example, if the camera is still in use by another process). 306 */ 307 public native final void lock(); 308 309 /** 310 * Reconnects to the camera service after another process used it. 311 * After {@link #unlock()} is called, another process may use the 312 * camera; when the process is done, you must reconnect to the camera, 313 * which will re-acquire the lock and allow you to continue using the 314 * camera. 315 * 316 * <p>This must be done after {@link android.media.MediaRecorder} is 317 * done recording if {@link android.media.MediaRecorder#setCamera(Camera)} 318 * was used. 319 * 320 * <p>If you are not recording video, you probably do not need this method. 321 * 322 * @throws IOException if a connection cannot be re-established (for 323 * example, if the camera is still in use by another process). 324 */ 325 public native final void reconnect() throws IOException; 326 327 /** 328 * Sets the {@link Surface} to be used for live preview. 329 * Either a surface or surface texture is necessary for preview, and 330 * preview is necessary to take pictures. The same surface can be re-set 331 * without harm. Setting a preview surface will un-set any preview surface 332 * texture that was set via {@link #setPreviewTexture}. 333 * 334 * <p>The {@link SurfaceHolder} must already contain a surface when this 335 * method is called. If you are using {@link android.view.SurfaceView}, 336 * you will need to register a {@link SurfaceHolder.Callback} with 337 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 338 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 339 * calling setPreviewDisplay() or starting preview. 340 * 341 * <p>This method must be called before {@link #startPreview()}. The 342 * one exception is that if the preview surface is not set (or set to null) 343 * before startPreview() is called, then this method may be called once 344 * with a non-null parameter to set the preview surface. (This allows 345 * camera setup and surface creation to happen in parallel, saving time.) 346 * The preview surface may not otherwise change while preview is running. 347 * 348 * @param holder containing the Surface on which to place the preview, 349 * or null to remove the preview surface 350 * @throws IOException if the method fails (for example, if the surface 351 * is unavailable or unsuitable). 352 */ 353 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 354 if (holder != null) { 355 setPreviewDisplay(holder.getSurface()); 356 } else { 357 setPreviewDisplay((Surface)null); 358 } 359 } 360 361 private native final void setPreviewDisplay(Surface surface) throws IOException; 362 363 /** 364 * Sets the {@link SurfaceTexture} to be used for live preview. 365 * Either a surface or surface texture is necessary for preview, and 366 * preview is necessary to take pictures. The same surface texture can be 367 * re-set without harm. Setting a preview surface texture will un-set any 368 * preview surface that was set via {@link #setPreviewDisplay}. 369 * 370 * <p>This method must be called before {@link #startPreview()}. The 371 * one exception is that if the preview surface texture is not set (or set 372 * to null) before startPreview() is called, then this method may be called 373 * once with a non-null parameter to set the preview surface. (This allows 374 * camera setup and surface creation to happen in parallel, saving time.) 375 * The preview surface texture may not otherwise change while preview is 376 * running. 377 * 378 * The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 379 * SurfaceTexture set as the preview texture have an unspecified zero point, 380 * and cannot be directly compared between different cameras or different 381 * instances of the same camera, or across multiple runs of the same 382 * program. 383 * 384 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 385 * images are to be sent or null to remove the current preview surface 386 * texture 387 * @throws IOException if the method fails (for example, if the surface 388 * texture is unavailable or unsuitable). 389 */ 390 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 391 392 /** 393 * Callback interface used to deliver copies of preview frames as 394 * they are displayed. 395 * 396 * @see #setPreviewCallback(Camera.PreviewCallback) 397 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 398 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 399 * @see #startPreview() 400 */ 401 public interface PreviewCallback 402 { 403 /** 404 * Called as preview frames are displayed. This callback is invoked 405 * on the event thread {@link #open(int)} was called from. 406 * 407 * @param data the contents of the preview frame in the format defined 408 * by {@link android.graphics.ImageFormat}, which can be queried 409 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 410 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 411 * is never called, the default will be the YCbCr_420_SP 412 * (NV21) format. 413 * @param camera the Camera service object. 414 */ 415 void onPreviewFrame(byte[] data, Camera camera); 416 }; 417 418 /** 419 * Starts capturing and drawing preview frames to the screen. 420 * Preview will not actually start until a surface is supplied 421 * with {@link #setPreviewDisplay(SurfaceHolder)} or 422 * {@link #setPreviewTexture(SurfaceTexture)}. 423 * 424 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 425 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 426 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 427 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 428 * will be called when preview data becomes available. 429 */ 430 public native final void startPreview(); 431 432 /** 433 * Stops capturing and drawing preview frames to the surface, and 434 * resets the camera for a future call to {@link #startPreview()}. 435 */ 436 public native final void stopPreview(); 437 438 /** 439 * Return current preview state. 440 * 441 * FIXME: Unhide before release 442 * @hide 443 */ 444 public native final boolean previewEnabled(); 445 446 /** 447 * Installs a callback to be invoked for every preview frame in addition 448 * to displaying them on the screen. The callback will be repeatedly called 449 * for as long as preview is active. This method can be called at any time, 450 * even while preview is live. Any other preview callbacks are overridden. 451 * 452 * @param cb a callback object that receives a copy of each preview frame, 453 * or null to stop receiving callbacks. 454 */ 455 public final void setPreviewCallback(PreviewCallback cb) { 456 mPreviewCallback = cb; 457 mOneShot = false; 458 mWithBuffer = false; 459 // Always use one-shot mode. We fake camera preview mode by 460 // doing one-shot preview continuously. 461 setHasPreviewCallback(cb != null, false); 462 } 463 464 /** 465 * Installs a callback to be invoked for the next preview frame in addition 466 * to displaying it on the screen. After one invocation, the callback is 467 * cleared. This method can be called any time, even when preview is live. 468 * Any other preview callbacks are overridden. 469 * 470 * @param cb a callback object that receives a copy of the next preview frame, 471 * or null to stop receiving callbacks. 472 */ 473 public final void setOneShotPreviewCallback(PreviewCallback cb) { 474 mPreviewCallback = cb; 475 mOneShot = true; 476 mWithBuffer = false; 477 setHasPreviewCallback(cb != null, false); 478 } 479 480 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 481 482 /** 483 * Installs a callback to be invoked for every preview frame, using buffers 484 * supplied with {@link #addCallbackBuffer(byte[])}, in addition to 485 * displaying them on the screen. The callback will be repeatedly called 486 * for as long as preview is active and buffers are available. 487 * Any other preview callbacks are overridden. 488 * 489 * <p>The purpose of this method is to improve preview efficiency and frame 490 * rate by allowing preview frame memory reuse. You must call 491 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 492 * calling this method -- or no callbacks will received. 493 * 494 * The buffer queue will be cleared if this method is called with a null 495 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 496 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. 497 * 498 * @param cb a callback object that receives a copy of the preview frame, 499 * or null to stop receiving callbacks and clear the buffer queue. 500 * @see #addCallbackBuffer(byte[]) 501 */ 502 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 503 mPreviewCallback = cb; 504 mOneShot = false; 505 mWithBuffer = true; 506 setHasPreviewCallback(cb != null, true); 507 } 508 509 /** 510 * Adds a pre-allocated buffer to the preview callback buffer queue. 511 * Applications can add one or more buffers to the queue. When a preview 512 * frame arrives and there is still at least one available buffer, the 513 * buffer will be used and removed from the queue. Then preview callback is 514 * invoked with the buffer. If a frame arrives and there is no buffer left, 515 * the frame is discarded. Applications should add buffers back when they 516 * finish processing the data in them. 517 * 518 * <p>The size of the buffer is determined by multiplying the preview 519 * image width, height, and bytes per pixel. The width and height can be 520 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 521 * can be computed from 522 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 523 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 524 * 525 * <p>This method is only necessary when 526 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 527 * {@link #setPreviewCallback(PreviewCallback)} or 528 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 529 * are automatically allocated. When a supplied buffer is too small to 530 * hold the preview frame data, preview callback will return null and 531 * the buffer will be removed from the buffer queue. 532 * 533 * @param callbackBuffer the buffer to add to the queue. 534 * The size should be width * height * bits_per_pixel / 8. 535 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 536 */ 537 public final void addCallbackBuffer(byte[] callbackBuffer) 538 { 539 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 540 } 541 542 /** 543 * Adds a pre-allocated buffer to the raw image callback buffer queue. 544 * Applications can add one or more buffers to the queue. When a raw image 545 * frame arrives and there is still at least one available buffer, the 546 * buffer will be used to hold the raw image data and removed from the 547 * queue. Then raw image callback is invoked with the buffer. If a raw 548 * image frame arrives but there is no buffer left, the frame is 549 * discarded. Applications should add buffers back when they finish 550 * processing the data in them by calling this method again in order 551 * to avoid running out of raw image callback buffers. 552 * 553 * <p>The size of the buffer is determined by multiplying the raw image 554 * width, height, and bytes per pixel. The width and height can be 555 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 556 * can be computed from 557 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 558 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 559 * 560 * <p>This method is only necessary when the PictureCallbck for raw image 561 * is used while calling {@link #takePicture(Camera.ShutterCallback, 562 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 563 * 564 * Please note that by calling this method, the mode for application-managed 565 * callback buffers is triggered. If this method has never been called, 566 * null will be returned by the raw image callback since there is 567 * no image callback buffer available. Furthermore, When a supplied buffer 568 * is too small to hold the raw image data, raw image callback will return 569 * null and the buffer will be removed from the buffer queue. 570 * 571 * @param callbackBuffer the buffer to add to the raw image callback buffer 572 * queue. The size should be width * height * (bits per pixel) / 8. An 573 * null callbackBuffer will be ignored and won't be added to the queue. 574 * 575 * @see #takePicture(Camera.ShutterCallback, 576 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 577 * 578 * {@hide} 579 */ 580 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 581 { 582 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 583 } 584 585 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 586 { 587 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 588 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 589 msgType != CAMERA_MSG_RAW_IMAGE) { 590 throw new IllegalArgumentException( 591 "Unsupported message type: " + msgType); 592 } 593 594 _addCallbackBuffer(callbackBuffer, msgType); 595 } 596 597 private native final void _addCallbackBuffer( 598 byte[] callbackBuffer, int msgType); 599 600 private class EventHandler extends Handler 601 { 602 private Camera mCamera; 603 604 public EventHandler(Camera c, Looper looper) { 605 super(looper); 606 mCamera = c; 607 } 608 609 @Override 610 public void handleMessage(Message msg) { 611 switch(msg.what) { 612 case CAMERA_MSG_SHUTTER: 613 if (mShutterCallback != null) { 614 mShutterCallback.onShutter(); 615 } 616 return; 617 618 case CAMERA_MSG_RAW_IMAGE: 619 if (mRawImageCallback != null) { 620 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 621 } 622 return; 623 624 case CAMERA_MSG_COMPRESSED_IMAGE: 625 if (mJpegCallback != null) { 626 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 627 } 628 return; 629 630 case CAMERA_MSG_PREVIEW_FRAME: 631 if (mPreviewCallback != null) { 632 PreviewCallback cb = mPreviewCallback; 633 if (mOneShot) { 634 // Clear the callback variable before the callback 635 // in case the app calls setPreviewCallback from 636 // the callback function 637 mPreviewCallback = null; 638 } else if (!mWithBuffer) { 639 // We're faking the camera preview mode to prevent 640 // the app from being flooded with preview frames. 641 // Set to oneshot mode again. 642 setHasPreviewCallback(true, false); 643 } 644 cb.onPreviewFrame((byte[])msg.obj, mCamera); 645 } 646 return; 647 648 case CAMERA_MSG_POSTVIEW_FRAME: 649 if (mPostviewCallback != null) { 650 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 651 } 652 return; 653 654 case CAMERA_MSG_FOCUS: 655 if (mAutoFocusCallback != null) { 656 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 657 } 658 return; 659 660 case CAMERA_MSG_ZOOM: 661 if (mZoomListener != null) { 662 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 663 } 664 return; 665 666 case CAMERA_MSG_ERROR : 667 Log.e(TAG, "Error " + msg.arg1); 668 if (mErrorCallback != null) { 669 mErrorCallback.onError(msg.arg1, mCamera); 670 } 671 return; 672 673 default: 674 Log.e(TAG, "Unknown message type " + msg.what); 675 return; 676 } 677 } 678 } 679 680 private static void postEventFromNative(Object camera_ref, 681 int what, int arg1, int arg2, Object obj) 682 { 683 Camera c = (Camera)((WeakReference)camera_ref).get(); 684 if (c == null) 685 return; 686 687 if (c.mEventHandler != null) { 688 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 689 c.mEventHandler.sendMessage(m); 690 } 691 } 692 693 /** 694 * Callback interface used to notify on completion of camera auto focus. 695 * 696 * <p>Devices that do not support auto-focus will receive a "fake" 697 * callback to this interface. If your application needs auto-focus and 698 * should not be installed on devices <em>without</em> auto-focus, you must 699 * declare that your app uses the 700 * {@code android.hardware.camera.autofocus} feature, in the 701 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 702 * manifest element.</p> 703 * 704 * @see #autoFocus(AutoFocusCallback) 705 */ 706 public interface AutoFocusCallback 707 { 708 /** 709 * Called when the camera auto focus completes. If the camera 710 * does not support auto-focus and autoFocus is called, 711 * onAutoFocus will be called immediately with a fake value of 712 * <code>success</code> set to <code>true</code>. 713 * 714 * @param success true if focus was successful, false if otherwise 715 * @param camera the Camera service object 716 */ 717 void onAutoFocus(boolean success, Camera camera); 718 }; 719 720 /** 721 * Starts camera auto-focus and registers a callback function to run when 722 * the camera is focused. This method is only valid when preview is active 723 * (between {@link #startPreview()} and before {@link #stopPreview()}). 724 * 725 * <p>Callers should check 726 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 727 * this method should be called. If the camera does not support auto-focus, 728 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 729 * callback will be called immediately. 730 * 731 * <p>If your application should not be installed 732 * on devices without auto-focus, you must declare that your application 733 * uses auto-focus with the 734 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 735 * manifest element.</p> 736 * 737 * <p>If the current flash mode is not 738 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 739 * fired during auto-focus, depending on the driver and camera hardware.<p> 740 * 741 * @param cb the callback to run 742 * @see #cancelAutoFocus() 743 */ 744 public final void autoFocus(AutoFocusCallback cb) 745 { 746 mAutoFocusCallback = cb; 747 native_autoFocus(); 748 } 749 private native final void native_autoFocus(); 750 751 /** 752 * Cancels any auto-focus function in progress. 753 * Whether or not auto-focus is currently in progress, 754 * this function will return the focus position to the default. 755 * If the camera does not support auto-focus, this is a no-op. 756 * 757 * @see #autoFocus(Camera.AutoFocusCallback) 758 */ 759 public final void cancelAutoFocus() 760 { 761 mAutoFocusCallback = null; 762 native_cancelAutoFocus(); 763 } 764 private native final void native_cancelAutoFocus(); 765 766 /** 767 * Callback interface used to signal the moment of actual image capture. 768 * 769 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 770 */ 771 public interface ShutterCallback 772 { 773 /** 774 * Called as near as possible to the moment when a photo is captured 775 * from the sensor. This is a good opportunity to play a shutter sound 776 * or give other feedback of camera operation. This may be some time 777 * after the photo was triggered, but some time before the actual data 778 * is available. 779 */ 780 void onShutter(); 781 } 782 783 /** 784 * Callback interface used to supply image data from a photo capture. 785 * 786 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 787 */ 788 public interface PictureCallback { 789 /** 790 * Called when image data is available after a picture is taken. 791 * The format of the data depends on the context of the callback 792 * and {@link Camera.Parameters} settings. 793 * 794 * @param data a byte array of the picture data 795 * @param camera the Camera service object 796 */ 797 void onPictureTaken(byte[] data, Camera camera); 798 }; 799 800 /** 801 * Equivalent to takePicture(shutter, raw, null, jpeg). 802 * 803 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 804 */ 805 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 806 PictureCallback jpeg) { 807 takePicture(shutter, raw, null, jpeg); 808 } 809 private native final void native_takePicture(int msgType); 810 811 /** 812 * Triggers an asynchronous image capture. The camera service will initiate 813 * a series of callbacks to the application as the image capture progresses. 814 * The shutter callback occurs after the image is captured. This can be used 815 * to trigger a sound to let the user know that image has been captured. The 816 * raw callback occurs when the raw image data is available (NOTE: the data 817 * will be null if there is no raw image callback buffer available or the 818 * raw image callback buffer is not large enough to hold the raw image). 819 * The postview callback occurs when a scaled, fully processed postview 820 * image is available (NOTE: not all hardware supports this). The jpeg 821 * callback occurs when the compressed image is available. If the 822 * application does not need a particular callback, a null can be passed 823 * instead of a callback method. 824 * 825 * <p>This method is only valid when preview is active (after 826 * {@link #startPreview()}). Preview will be stopped after the image is 827 * taken; callers must call {@link #startPreview()} again if they want to 828 * re-start preview or take more pictures. 829 * 830 * <p>After calling this method, you must not call {@link #startPreview()} 831 * or take another picture until the JPEG callback has returned. 832 * 833 * @param shutter the callback for image capture moment, or null 834 * @param raw the callback for raw (uncompressed) image data, or null 835 * @param postview callback with postview image data, may be null 836 * @param jpeg the callback for JPEG image data, or null 837 * 838 * @see #addRawImageCallbackBuffer(byte[]) 839 */ 840 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 841 PictureCallback postview, PictureCallback jpeg) { 842 mShutterCallback = shutter; 843 mRawImageCallback = raw; 844 mPostviewCallback = postview; 845 mJpegCallback = jpeg; 846 847 // If callback is not set, do not send me callbacks. 848 int msgType = 0; 849 if (mShutterCallback != null) { 850 msgType |= CAMERA_MSG_SHUTTER; 851 } 852 if (mRawImageCallback != null) { 853 msgType |= CAMERA_MSG_RAW_IMAGE; 854 } 855 if (mPostviewCallback != null) { 856 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 857 } 858 if (mJpegCallback != null) { 859 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 860 } 861 862 native_takePicture(msgType); 863 } 864 865 /** 866 * Zooms to the requested value smoothly. The driver will notify {@link 867 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 868 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 869 * is called with value 3. The 870 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 871 * method will be called three times with zoom values 1, 2, and 3. 872 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 873 * Applications should not call startSmoothZoom again or change the zoom 874 * value before zoom stops. If the supplied zoom value equals to the current 875 * zoom value, no zoom callback will be generated. This method is supported 876 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 877 * returns true. 878 * 879 * @param value zoom value. The valid range is 0 to {@link 880 * android.hardware.Camera.Parameters#getMaxZoom}. 881 * @throws IllegalArgumentException if the zoom value is invalid. 882 * @throws RuntimeException if the method fails. 883 * @see #setZoomChangeListener(OnZoomChangeListener) 884 */ 885 public native final void startSmoothZoom(int value); 886 887 /** 888 * Stops the smooth zoom. Applications should wait for the {@link 889 * OnZoomChangeListener} to know when the zoom is actually stopped. This 890 * method is supported if {@link 891 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 892 * 893 * @throws RuntimeException if the method fails. 894 */ 895 public native final void stopSmoothZoom(); 896 897 /** 898 * Set the clockwise rotation of preview display in degrees. This affects 899 * the preview frames and the picture displayed after snapshot. This method 900 * is useful for portrait mode applications. Note that preview display of 901 * front-facing cameras is flipped horizontally before the rotation, that 902 * is, the image is reflected along the central vertical axis of the camera 903 * sensor. So the users can see themselves as looking into a mirror. 904 * 905 * <p>This does not affect the order of byte array passed in {@link 906 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 907 * method is not allowed to be called during preview. 908 * 909 * <p>If you want to make the camera image show in the same orientation as 910 * the display, you can use the following code. 911 * <pre> 912 * public static void setCameraDisplayOrientation(Activity activity, 913 * int cameraId, android.hardware.Camera camera) { 914 * android.hardware.Camera.CameraInfo info = 915 * new android.hardware.Camera.CameraInfo(); 916 * android.hardware.Camera.getCameraInfo(cameraId, info); 917 * int rotation = activity.getWindowManager().getDefaultDisplay() 918 * .getRotation(); 919 * int degrees = 0; 920 * switch (rotation) { 921 * case Surface.ROTATION_0: degrees = 0; break; 922 * case Surface.ROTATION_90: degrees = 90; break; 923 * case Surface.ROTATION_180: degrees = 180; break; 924 * case Surface.ROTATION_270: degrees = 270; break; 925 * } 926 * 927 * int result; 928 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 929 * result = (info.orientation + degrees) % 360; 930 * result = (360 - result) % 360; // compensate the mirror 931 * } else { // back-facing 932 * result = (info.orientation - degrees + 360) % 360; 933 * } 934 * camera.setDisplayOrientation(result); 935 * } 936 * </pre> 937 * @param degrees the angle that the picture will be rotated clockwise. 938 * Valid values are 0, 90, 180, and 270. The starting 939 * position is 0 (landscape). 940 * @see #setPreviewDisplay(SurfaceHolder) 941 */ 942 public native final void setDisplayOrientation(int degrees); 943 944 /** 945 * Callback interface for zoom changes during a smooth zoom operation. 946 * 947 * @see #setZoomChangeListener(OnZoomChangeListener) 948 * @see #startSmoothZoom(int) 949 */ 950 public interface OnZoomChangeListener 951 { 952 /** 953 * Called when the zoom value has changed during a smooth zoom. 954 * 955 * @param zoomValue the current zoom value. In smooth zoom mode, camera 956 * calls this for every new zoom value. 957 * @param stopped whether smooth zoom is stopped. If the value is true, 958 * this is the last zoom update for the application. 959 * @param camera the Camera service object 960 */ 961 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 962 }; 963 964 /** 965 * Registers a listener to be notified when the zoom value is updated by the 966 * camera driver during smooth zoom. 967 * 968 * @param listener the listener to notify 969 * @see #startSmoothZoom(int) 970 */ 971 public final void setZoomChangeListener(OnZoomChangeListener listener) 972 { 973 mZoomListener = listener; 974 } 975 976 // Error codes match the enum in include/ui/Camera.h 977 978 /** 979 * Unspecified camera error. 980 * @see Camera.ErrorCallback 981 */ 982 public static final int CAMERA_ERROR_UNKNOWN = 1; 983 984 /** 985 * Media server died. In this case, the application must release the 986 * Camera object and instantiate a new one. 987 * @see Camera.ErrorCallback 988 */ 989 public static final int CAMERA_ERROR_SERVER_DIED = 100; 990 991 /** 992 * Callback interface for camera error notification. 993 * 994 * @see #setErrorCallback(ErrorCallback) 995 */ 996 public interface ErrorCallback 997 { 998 /** 999 * Callback for camera errors. 1000 * @param error error code: 1001 * <ul> 1002 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1003 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1004 * </ul> 1005 * @param camera the Camera service object 1006 */ 1007 void onError(int error, Camera camera); 1008 }; 1009 1010 /** 1011 * Registers a callback to be invoked when an error occurs. 1012 * @param cb The callback to run 1013 */ 1014 public final void setErrorCallback(ErrorCallback cb) 1015 { 1016 mErrorCallback = cb; 1017 } 1018 1019 private native final void native_setParameters(String params); 1020 private native final String native_getParameters(); 1021 1022 /** 1023 * Changes the settings for this Camera service. 1024 * 1025 * @param params the Parameters to use for this Camera service 1026 * @throws RuntimeException if any parameter is invalid or not supported. 1027 * @see #getParameters() 1028 */ 1029 public void setParameters(Parameters params) { 1030 native_setParameters(params.flatten()); 1031 } 1032 1033 /** 1034 * Returns the current settings for this Camera service. 1035 * If modifications are made to the returned Parameters, they must be passed 1036 * to {@link #setParameters(Camera.Parameters)} to take effect. 1037 * 1038 * @see #setParameters(Camera.Parameters) 1039 */ 1040 public Parameters getParameters() { 1041 Parameters p = new Parameters(); 1042 String s = native_getParameters(); 1043 p.unflatten(s); 1044 return p; 1045 } 1046 1047 /** 1048 * Image size (width and height dimensions). 1049 */ 1050 public class Size { 1051 /** 1052 * Sets the dimensions for pictures. 1053 * 1054 * @param w the photo width (pixels) 1055 * @param h the photo height (pixels) 1056 */ 1057 public Size(int w, int h) { 1058 width = w; 1059 height = h; 1060 } 1061 /** 1062 * Compares {@code obj} to this size. 1063 * 1064 * @param obj the object to compare this size with. 1065 * @return {@code true} if the width and height of {@code obj} is the 1066 * same as those of this size. {@code false} otherwise. 1067 */ 1068 @Override 1069 public boolean equals(Object obj) { 1070 if (!(obj instanceof Size)) { 1071 return false; 1072 } 1073 Size s = (Size) obj; 1074 return width == s.width && height == s.height; 1075 } 1076 @Override 1077 public int hashCode() { 1078 return width * 32713 + height; 1079 } 1080 /** width of the picture */ 1081 public int width; 1082 /** height of the picture */ 1083 public int height; 1084 }; 1085 1086 /** 1087 * Area class for focus. 1088 * 1089 * @see #setFocusAreas(List) 1090 * @see #getFocusAreas() 1091 */ 1092 public static class Area { 1093 /** 1094 * Create an area with specified rectangle and weight. 1095 * 1096 * @param rect the rectangle of the area 1097 * @param weight the weight of the area 1098 */ 1099 public Area(Rect rect, int weight) { 1100 this.rect = rect; 1101 this.weight = weight; 1102 } 1103 /** 1104 * Compares {@code obj} to this area. 1105 * 1106 * @param obj the object to compare this area with. 1107 * @return {@code true} if the rectangle and weight of {@code obj} is 1108 * the same as those of this area. {@code false} otherwise. 1109 */ 1110 @Override 1111 public boolean equals(Object obj) { 1112 if (!(obj instanceof Area)) { 1113 return false; 1114 } 1115 Area a = (Area) obj; 1116 if (rect == null) { 1117 if (a.rect != null) return false; 1118 } else { 1119 if (!rect.equals(a.rect)) return false; 1120 } 1121 return weight == a.weight; 1122 } 1123 1124 /** rectangle of the area */ 1125 public Rect rect; 1126 1127 /** weight of the area */ 1128 public int weight; 1129 }; 1130 1131 /** 1132 * Camera service settings. 1133 * 1134 * <p>To make camera parameters take effect, applications have to call 1135 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1136 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1137 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1138 * is called with the changed parameters object. 1139 * 1140 * <p>Different devices may have different camera capabilities, such as 1141 * picture size or flash modes. The application should query the camera 1142 * capabilities before setting parameters. For example, the application 1143 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1144 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1145 * camera does not support color effects, 1146 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1147 */ 1148 public class Parameters { 1149 // Parameter keys to communicate with the camera driver. 1150 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1151 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1152 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1153 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1154 private static final String KEY_PICTURE_SIZE = "picture-size"; 1155 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1156 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1157 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1158 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1159 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1160 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1161 private static final String KEY_ROTATION = "rotation"; 1162 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1163 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1164 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1165 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1166 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1167 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1168 private static final String KEY_EFFECT = "effect"; 1169 private static final String KEY_ANTIBANDING = "antibanding"; 1170 private static final String KEY_SCENE_MODE = "scene-mode"; 1171 private static final String KEY_FLASH_MODE = "flash-mode"; 1172 private static final String KEY_FOCUS_MODE = "focus-mode"; 1173 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1174 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1175 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1176 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1177 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1178 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1179 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1180 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1181 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1182 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1183 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1184 private static final String KEY_METERING_AREAS = "metering-areas"; 1185 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1186 private static final String KEY_ZOOM = "zoom"; 1187 private static final String KEY_MAX_ZOOM = "max-zoom"; 1188 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1189 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1190 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1191 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1192 private static final String KEY_VIDEO_SIZE = "video-size"; 1193 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1194 "preferred-preview-size-for-video"; 1195 1196 // Parameter key suffix for supported values. 1197 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1198 1199 private static final String TRUE = "true"; 1200 private static final String FALSE = "false"; 1201 1202 // Values for white balance settings. 1203 public static final String WHITE_BALANCE_AUTO = "auto"; 1204 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1205 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1206 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1207 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1208 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1209 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1210 public static final String WHITE_BALANCE_SHADE = "shade"; 1211 1212 // Values for color effect settings. 1213 public static final String EFFECT_NONE = "none"; 1214 public static final String EFFECT_MONO = "mono"; 1215 public static final String EFFECT_NEGATIVE = "negative"; 1216 public static final String EFFECT_SOLARIZE = "solarize"; 1217 public static final String EFFECT_SEPIA = "sepia"; 1218 public static final String EFFECT_POSTERIZE = "posterize"; 1219 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1220 public static final String EFFECT_BLACKBOARD = "blackboard"; 1221 public static final String EFFECT_AQUA = "aqua"; 1222 1223 // Values for antibanding settings. 1224 public static final String ANTIBANDING_AUTO = "auto"; 1225 public static final String ANTIBANDING_50HZ = "50hz"; 1226 public static final String ANTIBANDING_60HZ = "60hz"; 1227 public static final String ANTIBANDING_OFF = "off"; 1228 1229 // Values for flash mode settings. 1230 /** 1231 * Flash will not be fired. 1232 */ 1233 public static final String FLASH_MODE_OFF = "off"; 1234 1235 /** 1236 * Flash will be fired automatically when required. The flash may be fired 1237 * during preview, auto-focus, or snapshot depending on the driver. 1238 */ 1239 public static final String FLASH_MODE_AUTO = "auto"; 1240 1241 /** 1242 * Flash will always be fired during snapshot. The flash may also be 1243 * fired during preview or auto-focus depending on the driver. 1244 */ 1245 public static final String FLASH_MODE_ON = "on"; 1246 1247 /** 1248 * Flash will be fired in red-eye reduction mode. 1249 */ 1250 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1251 1252 /** 1253 * Constant emission of light during preview, auto-focus and snapshot. 1254 * This can also be used for video recording. 1255 */ 1256 public static final String FLASH_MODE_TORCH = "torch"; 1257 1258 /** 1259 * Scene mode is off. 1260 */ 1261 public static final String SCENE_MODE_AUTO = "auto"; 1262 1263 /** 1264 * Take photos of fast moving objects. Same as {@link 1265 * #SCENE_MODE_SPORTS}. 1266 */ 1267 public static final String SCENE_MODE_ACTION = "action"; 1268 1269 /** 1270 * Take people pictures. 1271 */ 1272 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1273 1274 /** 1275 * Take pictures on distant objects. 1276 */ 1277 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1278 1279 /** 1280 * Take photos at night. 1281 */ 1282 public static final String SCENE_MODE_NIGHT = "night"; 1283 1284 /** 1285 * Take people pictures at night. 1286 */ 1287 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1288 1289 /** 1290 * Take photos in a theater. Flash light is off. 1291 */ 1292 public static final String SCENE_MODE_THEATRE = "theatre"; 1293 1294 /** 1295 * Take pictures on the beach. 1296 */ 1297 public static final String SCENE_MODE_BEACH = "beach"; 1298 1299 /** 1300 * Take pictures on the snow. 1301 */ 1302 public static final String SCENE_MODE_SNOW = "snow"; 1303 1304 /** 1305 * Take sunset photos. 1306 */ 1307 public static final String SCENE_MODE_SUNSET = "sunset"; 1308 1309 /** 1310 * Avoid blurry pictures (for example, due to hand shake). 1311 */ 1312 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1313 1314 /** 1315 * For shooting firework displays. 1316 */ 1317 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1318 1319 /** 1320 * Take photos of fast moving objects. Same as {@link 1321 * #SCENE_MODE_ACTION}. 1322 */ 1323 public static final String SCENE_MODE_SPORTS = "sports"; 1324 1325 /** 1326 * Take indoor low-light shot. 1327 */ 1328 public static final String SCENE_MODE_PARTY = "party"; 1329 1330 /** 1331 * Capture the naturally warm color of scenes lit by candles. 1332 */ 1333 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1334 1335 /** 1336 * Applications are looking for a barcode. Camera driver will be 1337 * optimized for barcode reading. 1338 */ 1339 public static final String SCENE_MODE_BARCODE = "barcode"; 1340 1341 /** 1342 * Auto-focus mode. Applications should call {@link 1343 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1344 */ 1345 public static final String FOCUS_MODE_AUTO = "auto"; 1346 1347 /** 1348 * Focus is set at infinity. Applications should not call 1349 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1350 */ 1351 public static final String FOCUS_MODE_INFINITY = "infinity"; 1352 1353 /** 1354 * Macro (close-up) focus mode. Applications should call 1355 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1356 * mode. 1357 */ 1358 public static final String FOCUS_MODE_MACRO = "macro"; 1359 1360 /** 1361 * Focus is fixed. The camera is always in this mode if the focus is not 1362 * adjustable. If the camera has auto-focus, this mode can fix the 1363 * focus, which is usually at hyperfocal distance. Applications should 1364 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1365 */ 1366 public static final String FOCUS_MODE_FIXED = "fixed"; 1367 1368 /** 1369 * Extended depth of field (EDOF). Focusing is done digitally and 1370 * continuously. Applications should not call {@link 1371 * #autoFocus(AutoFocusCallback)} in this mode. 1372 */ 1373 public static final String FOCUS_MODE_EDOF = "edof"; 1374 1375 /** 1376 * Continuous auto focus mode intended for video recording. The camera 1377 * continuously tries to focus. This is ideal for shooting video. 1378 * Applications still can call {@link 1379 * #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1380 * Camera.PictureCallback)} in this mode but the subject may not be in 1381 * focus. Auto focus starts when the parameter is set. Applications 1382 * should not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1383 * To stop continuous focus, applications should change the focus mode 1384 * to other modes. 1385 */ 1386 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1387 1388 // Indices for focus distance array. 1389 /** 1390 * The array index of near focus distance for use with 1391 * {@link #getFocusDistances(float[])}. 1392 */ 1393 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1394 1395 /** 1396 * The array index of optimal focus distance for use with 1397 * {@link #getFocusDistances(float[])}. 1398 */ 1399 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1400 1401 /** 1402 * The array index of far focus distance for use with 1403 * {@link #getFocusDistances(float[])}. 1404 */ 1405 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1406 1407 /** 1408 * The array index of minimum preview fps for use with {@link 1409 * #getPreviewFpsRange(int[])} or {@link 1410 * #getSupportedPreviewFpsRange()}. 1411 */ 1412 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1413 1414 /** 1415 * The array index of maximum preview fps for use with {@link 1416 * #getPreviewFpsRange(int[])} or {@link 1417 * #getSupportedPreviewFpsRange()}. 1418 */ 1419 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1420 1421 // Formats for setPreviewFormat and setPictureFormat. 1422 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1423 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1424 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1425 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1426 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1427 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1428 1429 private HashMap<String, String> mMap; 1430 1431 private Parameters() { 1432 mMap = new HashMap<String, String>(); 1433 } 1434 1435 /** 1436 * Writes the current Parameters to the log. 1437 * @hide 1438 * @deprecated 1439 */ 1440 public void dump() { 1441 Log.e(TAG, "dump: size=" + mMap.size()); 1442 for (String k : mMap.keySet()) { 1443 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1444 } 1445 } 1446 1447 /** 1448 * Creates a single string with all the parameters set in 1449 * this Parameters object. 1450 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1451 * 1452 * @return a String with all values from this Parameters object, in 1453 * semi-colon delimited key-value pairs 1454 */ 1455 public String flatten() { 1456 StringBuilder flattened = new StringBuilder(); 1457 for (String k : mMap.keySet()) { 1458 flattened.append(k); 1459 flattened.append("="); 1460 flattened.append(mMap.get(k)); 1461 flattened.append(";"); 1462 } 1463 // chop off the extra semicolon at the end 1464 flattened.deleteCharAt(flattened.length()-1); 1465 return flattened.toString(); 1466 } 1467 1468 /** 1469 * Takes a flattened string of parameters and adds each one to 1470 * this Parameters object. 1471 * <p>The {@link #flatten()} method does the reverse.</p> 1472 * 1473 * @param flattened a String of parameters (key-value paired) that 1474 * are semi-colon delimited 1475 */ 1476 public void unflatten(String flattened) { 1477 mMap.clear(); 1478 1479 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1480 while (tokenizer.hasMoreElements()) { 1481 String kv = tokenizer.nextToken(); 1482 int pos = kv.indexOf('='); 1483 if (pos == -1) { 1484 continue; 1485 } 1486 String k = kv.substring(0, pos); 1487 String v = kv.substring(pos + 1); 1488 mMap.put(k, v); 1489 } 1490 } 1491 1492 public void remove(String key) { 1493 mMap.remove(key); 1494 } 1495 1496 /** 1497 * Sets a String parameter. 1498 * 1499 * @param key the key name for the parameter 1500 * @param value the String value of the parameter 1501 */ 1502 public void set(String key, String value) { 1503 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1504 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1505 return; 1506 } 1507 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1508 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1509 return; 1510 } 1511 1512 mMap.put(key, value); 1513 } 1514 1515 /** 1516 * Sets an integer parameter. 1517 * 1518 * @param key the key name for the parameter 1519 * @param value the int value of the parameter 1520 */ 1521 public void set(String key, int value) { 1522 mMap.put(key, Integer.toString(value)); 1523 } 1524 1525 private void set(String key, List<Area> areas) { 1526 if (areas == null) { 1527 set(key, "(0,0,0,0,0)"); 1528 } else { 1529 StringBuilder buffer = new StringBuilder(); 1530 for (int i = 0; i < areas.size(); i++) { 1531 Area area = areas.get(i); 1532 Rect rect = area.rect; 1533 buffer.append('('); 1534 buffer.append(rect.left); 1535 buffer.append(','); 1536 buffer.append(rect.top); 1537 buffer.append(','); 1538 buffer.append(rect.right); 1539 buffer.append(','); 1540 buffer.append(rect.bottom); 1541 buffer.append(','); 1542 buffer.append(area.weight); 1543 buffer.append(')'); 1544 if (i != areas.size() - 1) buffer.append(','); 1545 } 1546 set(key, buffer.toString()); 1547 } 1548 } 1549 1550 /** 1551 * Returns the value of a String parameter. 1552 * 1553 * @param key the key name for the parameter 1554 * @return the String value of the parameter 1555 */ 1556 public String get(String key) { 1557 return mMap.get(key); 1558 } 1559 1560 /** 1561 * Returns the value of an integer parameter. 1562 * 1563 * @param key the key name for the parameter 1564 * @return the int value of the parameter 1565 */ 1566 public int getInt(String key) { 1567 return Integer.parseInt(mMap.get(key)); 1568 } 1569 1570 /** 1571 * Sets the dimensions for preview pictures. If the preview has already 1572 * started, applications should stop the preview first before changing 1573 * preview size. 1574 * 1575 * The sides of width and height are based on camera orientation. That 1576 * is, the preview size is the size before it is rotated by display 1577 * orientation. So applications need to consider the display orientation 1578 * while setting preview size. For example, suppose the camera supports 1579 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1580 * preview ratio. If the display orientation is set to 0 or 180, preview 1581 * size should be set to 480x320. If the display orientation is set to 1582 * 90 or 270, preview size should be set to 320x480. The display 1583 * orientation should also be considered while setting picture size and 1584 * thumbnail size. 1585 * 1586 * @param width the width of the pictures, in pixels 1587 * @param height the height of the pictures, in pixels 1588 * @see #setDisplayOrientation(int) 1589 * @see #getCameraInfo(int, CameraInfo) 1590 * @see #setPictureSize(int, int) 1591 * @see #setJpegThumbnailSize(int, int) 1592 */ 1593 public void setPreviewSize(int width, int height) { 1594 String v = Integer.toString(width) + "x" + Integer.toString(height); 1595 set(KEY_PREVIEW_SIZE, v); 1596 } 1597 1598 /** 1599 * Returns the dimensions setting for preview pictures. 1600 * 1601 * @return a Size object with the width and height setting 1602 * for the preview picture 1603 */ 1604 public Size getPreviewSize() { 1605 String pair = get(KEY_PREVIEW_SIZE); 1606 return strToSize(pair); 1607 } 1608 1609 /** 1610 * Gets the supported preview sizes. 1611 * 1612 * @return a list of Size object. This method will always return a list 1613 * with at least one element. 1614 */ 1615 public List<Size> getSupportedPreviewSizes() { 1616 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1617 return splitSize(str); 1618 } 1619 1620 /** 1621 * Gets the supported video frame sizes that can be used by 1622 * MediaRecorder. 1623 * 1624 * If the returned list is not null, the returned list will contain at 1625 * least one Size and one of the sizes in the returned list must be 1626 * passed to MediaRecorder.setVideoSize() for camcorder application if 1627 * camera is used as the video source. In this case, the size of the 1628 * preview can be different from the resolution of the recorded video 1629 * during video recording. 1630 * 1631 * @return a list of Size object if camera has separate preview and 1632 * video output; otherwise, null is returned. 1633 * @see #getPreferredPreviewSizeForVideo() 1634 */ 1635 public List<Size> getSupportedVideoSizes() { 1636 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1637 return splitSize(str); 1638 } 1639 1640 /** 1641 * Returns the preferred or recommended preview size (width and height) 1642 * in pixels for video recording. Camcorder applications should 1643 * set the preview size to a value that is not larger than the 1644 * preferred preview size. In other words, the product of the width 1645 * and height of the preview size should not be larger than that of 1646 * the preferred preview size. In addition, we recommend to choose a 1647 * preview size that has the same aspect ratio as the resolution of 1648 * video to be recorded. 1649 * 1650 * @return the preferred preview size (width and height) in pixels for 1651 * video recording if getSupportedVideoSizes() does not return 1652 * null; otherwise, null is returned. 1653 * @see #getSupportedVideoSizes() 1654 */ 1655 public Size getPreferredPreviewSizeForVideo() { 1656 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1657 return strToSize(pair); 1658 } 1659 1660 /** 1661 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1662 * applications set both width and height to 0, EXIF will not contain 1663 * thumbnail. 1664 * 1665 * Applications need to consider the display orientation. See {@link 1666 * #setPreviewSize(int,int)} for reference. 1667 * 1668 * @param width the width of the thumbnail, in pixels 1669 * @param height the height of the thumbnail, in pixels 1670 * @see #setPreviewSize(int,int) 1671 */ 1672 public void setJpegThumbnailSize(int width, int height) { 1673 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1674 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1675 } 1676 1677 /** 1678 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1679 * 1680 * @return a Size object with the height and width setting for the EXIF 1681 * thumbnails 1682 */ 1683 public Size getJpegThumbnailSize() { 1684 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1685 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1686 } 1687 1688 /** 1689 * Gets the supported jpeg thumbnail sizes. 1690 * 1691 * @return a list of Size object. This method will always return a list 1692 * with at least two elements. Size 0,0 (no thumbnail) is always 1693 * supported. 1694 */ 1695 public List<Size> getSupportedJpegThumbnailSizes() { 1696 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1697 return splitSize(str); 1698 } 1699 1700 /** 1701 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1702 * 1703 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1704 * to 100, with 100 being the best. 1705 */ 1706 public void setJpegThumbnailQuality(int quality) { 1707 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1708 } 1709 1710 /** 1711 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1712 * 1713 * @return the JPEG quality setting of the EXIF thumbnail. 1714 */ 1715 public int getJpegThumbnailQuality() { 1716 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1717 } 1718 1719 /** 1720 * Sets Jpeg quality of captured picture. 1721 * 1722 * @param quality the JPEG quality of captured picture. The range is 1 1723 * to 100, with 100 being the best. 1724 */ 1725 public void setJpegQuality(int quality) { 1726 set(KEY_JPEG_QUALITY, quality); 1727 } 1728 1729 /** 1730 * Returns the quality setting for the JPEG picture. 1731 * 1732 * @return the JPEG picture quality setting. 1733 */ 1734 public int getJpegQuality() { 1735 return getInt(KEY_JPEG_QUALITY); 1736 } 1737 1738 /** 1739 * Sets the rate at which preview frames are received. This is the 1740 * target frame rate. The actual frame rate depends on the driver. 1741 * 1742 * @param fps the frame rate (frames per second) 1743 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 1744 */ 1745 @Deprecated 1746 public void setPreviewFrameRate(int fps) { 1747 set(KEY_PREVIEW_FRAME_RATE, fps); 1748 } 1749 1750 /** 1751 * Returns the setting for the rate at which preview frames are 1752 * received. This is the target frame rate. The actual frame rate 1753 * depends on the driver. 1754 * 1755 * @return the frame rate setting (frames per second) 1756 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 1757 */ 1758 @Deprecated 1759 public int getPreviewFrameRate() { 1760 return getInt(KEY_PREVIEW_FRAME_RATE); 1761 } 1762 1763 /** 1764 * Gets the supported preview frame rates. 1765 * 1766 * @return a list of supported preview frame rates. null if preview 1767 * frame rate setting is not supported. 1768 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 1769 */ 1770 @Deprecated 1771 public List<Integer> getSupportedPreviewFrameRates() { 1772 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1773 return splitInt(str); 1774 } 1775 1776 /** 1777 * Sets the maximum and maximum preview fps. This controls the rate of 1778 * preview frames received in {@link PreviewCallback}. The minimum and 1779 * maximum preview fps must be one of the elements from {@link 1780 * #getSupportedPreviewFpsRange}. 1781 * 1782 * @param min the minimum preview fps (scaled by 1000). 1783 * @param max the maximum preview fps (scaled by 1000). 1784 * @throws RuntimeException if fps range is invalid. 1785 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 1786 * @see #getSupportedPreviewFpsRange() 1787 */ 1788 public void setPreviewFpsRange(int min, int max) { 1789 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 1790 } 1791 1792 /** 1793 * Returns the current minimum and maximum preview fps. The values are 1794 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 1795 * 1796 * @return range the minimum and maximum preview fps (scaled by 1000). 1797 * @see #PREVIEW_FPS_MIN_INDEX 1798 * @see #PREVIEW_FPS_MAX_INDEX 1799 * @see #getSupportedPreviewFpsRange() 1800 */ 1801 public void getPreviewFpsRange(int[] range) { 1802 if (range == null || range.length != 2) { 1803 throw new IllegalArgumentException( 1804 "range must be an array with two elements."); 1805 } 1806 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 1807 } 1808 1809 /** 1810 * Gets the supported preview fps (frame-per-second) ranges. Each range 1811 * contains a minimum fps and maximum fps. If minimum fps equals to 1812 * maximum fps, the camera outputs frames in fixed frame rate. If not, 1813 * the camera outputs frames in auto frame rate. The actual frame rate 1814 * fluctuates between the minimum and the maximum. The values are 1815 * multiplied by 1000 and represented in integers. For example, if frame 1816 * rate is 26.623 frames per second, the value is 26623. 1817 * 1818 * @return a list of supported preview fps ranges. This method returns a 1819 * list with at least one element. Every element is an int array 1820 * of two values - minimum fps and maximum fps. The list is 1821 * sorted from small to large (first by maximum fps and then 1822 * minimum fps). 1823 * @see #PREVIEW_FPS_MIN_INDEX 1824 * @see #PREVIEW_FPS_MAX_INDEX 1825 */ 1826 public List<int[]> getSupportedPreviewFpsRange() { 1827 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 1828 return splitRange(str); 1829 } 1830 1831 /** 1832 * Sets the image format for preview pictures. 1833 * <p>If this is never called, the default format will be 1834 * {@link android.graphics.ImageFormat#NV21}, which 1835 * uses the NV21 encoding format.</p> 1836 * 1837 * @param pixel_format the desired preview picture format, defined 1838 * by one of the {@link android.graphics.ImageFormat} constants. 1839 * (E.g., <var>ImageFormat.NV21</var> (default), 1840 * <var>ImageFormat.RGB_565</var>, or 1841 * <var>ImageFormat.JPEG</var>) 1842 * @see android.graphics.ImageFormat 1843 */ 1844 public void setPreviewFormat(int pixel_format) { 1845 String s = cameraFormatForPixelFormat(pixel_format); 1846 if (s == null) { 1847 throw new IllegalArgumentException( 1848 "Invalid pixel_format=" + pixel_format); 1849 } 1850 1851 set(KEY_PREVIEW_FORMAT, s); 1852 } 1853 1854 /** 1855 * Returns the image format for preview frames got from 1856 * {@link PreviewCallback}. 1857 * 1858 * @return the preview format. 1859 * @see android.graphics.ImageFormat 1860 */ 1861 public int getPreviewFormat() { 1862 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1863 } 1864 1865 /** 1866 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 1867 * is always supported. {@link android.graphics.ImageFormat#YV12} 1868 * is always supported since API level 12. 1869 * 1870 * @return a list of supported preview formats. This method will always 1871 * return a list with at least one element. 1872 * @see android.graphics.ImageFormat 1873 */ 1874 public List<Integer> getSupportedPreviewFormats() { 1875 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1876 ArrayList<Integer> formats = new ArrayList<Integer>(); 1877 for (String s : split(str)) { 1878 int f = pixelFormatForCameraFormat(s); 1879 if (f == ImageFormat.UNKNOWN) continue; 1880 formats.add(f); 1881 } 1882 return formats; 1883 } 1884 1885 /** 1886 * Sets the dimensions for pictures. 1887 * 1888 * Applications need to consider the display orientation. See {@link 1889 * #setPreviewSize(int,int)} for reference. 1890 * 1891 * @param width the width for pictures, in pixels 1892 * @param height the height for pictures, in pixels 1893 * @see #setPreviewSize(int,int) 1894 * 1895 */ 1896 public void setPictureSize(int width, int height) { 1897 String v = Integer.toString(width) + "x" + Integer.toString(height); 1898 set(KEY_PICTURE_SIZE, v); 1899 } 1900 1901 /** 1902 * Returns the dimension setting for pictures. 1903 * 1904 * @return a Size object with the height and width setting 1905 * for pictures 1906 */ 1907 public Size getPictureSize() { 1908 String pair = get(KEY_PICTURE_SIZE); 1909 return strToSize(pair); 1910 } 1911 1912 /** 1913 * Gets the supported picture sizes. 1914 * 1915 * @return a list of supported picture sizes. This method will always 1916 * return a list with at least one element. 1917 */ 1918 public List<Size> getSupportedPictureSizes() { 1919 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1920 return splitSize(str); 1921 } 1922 1923 /** 1924 * Sets the image format for pictures. 1925 * 1926 * @param pixel_format the desired picture format 1927 * (<var>ImageFormat.NV21</var>, 1928 * <var>ImageFormat.RGB_565</var>, or 1929 * <var>ImageFormat.JPEG</var>) 1930 * @see android.graphics.ImageFormat 1931 */ 1932 public void setPictureFormat(int pixel_format) { 1933 String s = cameraFormatForPixelFormat(pixel_format); 1934 if (s == null) { 1935 throw new IllegalArgumentException( 1936 "Invalid pixel_format=" + pixel_format); 1937 } 1938 1939 set(KEY_PICTURE_FORMAT, s); 1940 } 1941 1942 /** 1943 * Returns the image format for pictures. 1944 * 1945 * @return the picture format 1946 * @see android.graphics.ImageFormat 1947 */ 1948 public int getPictureFormat() { 1949 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1950 } 1951 1952 /** 1953 * Gets the supported picture formats. 1954 * 1955 * @return supported picture formats. This method will always return a 1956 * list with at least one element. 1957 * @see android.graphics.ImageFormat 1958 */ 1959 public List<Integer> getSupportedPictureFormats() { 1960 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1961 ArrayList<Integer> formats = new ArrayList<Integer>(); 1962 for (String s : split(str)) { 1963 int f = pixelFormatForCameraFormat(s); 1964 if (f == ImageFormat.UNKNOWN) continue; 1965 formats.add(f); 1966 } 1967 return formats; 1968 } 1969 1970 private String cameraFormatForPixelFormat(int pixel_format) { 1971 switch(pixel_format) { 1972 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1973 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1974 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1975 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 1976 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1977 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1978 default: return null; 1979 } 1980 } 1981 1982 private int pixelFormatForCameraFormat(String format) { 1983 if (format == null) 1984 return ImageFormat.UNKNOWN; 1985 1986 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1987 return ImageFormat.NV16; 1988 1989 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1990 return ImageFormat.NV21; 1991 1992 if (format.equals(PIXEL_FORMAT_YUV422I)) 1993 return ImageFormat.YUY2; 1994 1995 if (format.equals(PIXEL_FORMAT_YUV420P)) 1996 return ImageFormat.YV12; 1997 1998 if (format.equals(PIXEL_FORMAT_RGB565)) 1999 return ImageFormat.RGB_565; 2000 2001 if (format.equals(PIXEL_FORMAT_JPEG)) 2002 return ImageFormat.JPEG; 2003 2004 return ImageFormat.UNKNOWN; 2005 } 2006 2007 /** 2008 * Sets the rotation angle in degrees relative to the orientation of 2009 * the camera. This affects the pictures returned from JPEG {@link 2010 * PictureCallback}. The camera driver may set orientation in the 2011 * EXIF header without rotating the picture. Or the driver may rotate 2012 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 2013 * the orientation in the EXIF header will be missing or 1 (row #0 is 2014 * top and column #0 is left side). 2015 * 2016 * <p>If applications want to rotate the picture to match the orientation 2017 * of what users see, apps should use {@link 2018 * android.view.OrientationEventListener} and {@link CameraInfo}. 2019 * The value from OrientationEventListener is relative to the natural 2020 * orientation of the device. CameraInfo.orientation is the angle 2021 * between camera orientation and natural device orientation. The sum 2022 * of the two is the rotation angle for back-facing camera. The 2023 * difference of the two is the rotation angle for front-facing camera. 2024 * Note that the JPEG pictures of front-facing cameras are not mirrored 2025 * as in preview display. 2026 * 2027 * <p>For example, suppose the natural orientation of the device is 2028 * portrait. The device is rotated 270 degrees clockwise, so the device 2029 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2030 * landscape and the top side of the camera sensor is aligned with the 2031 * right edge of the display in natural orientation. So the camera 2032 * orientation is 90. The rotation should be set to 0 (270 + 90). 2033 * 2034 * <p>The reference code is as follows. 2035 * 2036 * <pre> 2037 * public void public void onOrientationChanged(int orientation) { 2038 * if (orientation == ORIENTATION_UNKNOWN) return; 2039 * android.hardware.Camera.CameraInfo info = 2040 * new android.hardware.Camera.CameraInfo(); 2041 * android.hardware.Camera.getCameraInfo(cameraId, info); 2042 * orientation = (orientation + 45) / 90 * 90; 2043 * int rotation = 0; 2044 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2045 * rotation = (info.orientation - orientation + 360) % 360; 2046 * } else { // back-facing camera 2047 * rotation = (info.orientation + orientation) % 360; 2048 * } 2049 * mParameters.setRotation(rotation); 2050 * } 2051 * </pre> 2052 * 2053 * @param rotation The rotation angle in degrees relative to the 2054 * orientation of the camera. Rotation can only be 0, 2055 * 90, 180 or 270. 2056 * @throws IllegalArgumentException if rotation value is invalid. 2057 * @see android.view.OrientationEventListener 2058 * @see #getCameraInfo(int, CameraInfo) 2059 */ 2060 public void setRotation(int rotation) { 2061 if (rotation == 0 || rotation == 90 || rotation == 180 2062 || rotation == 270) { 2063 set(KEY_ROTATION, Integer.toString(rotation)); 2064 } else { 2065 throw new IllegalArgumentException( 2066 "Invalid rotation=" + rotation); 2067 } 2068 } 2069 2070 /** 2071 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2072 * header. 2073 * 2074 * @param latitude GPS latitude coordinate. 2075 */ 2076 public void setGpsLatitude(double latitude) { 2077 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2078 } 2079 2080 /** 2081 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2082 * header. 2083 * 2084 * @param longitude GPS longitude coordinate. 2085 */ 2086 public void setGpsLongitude(double longitude) { 2087 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2088 } 2089 2090 /** 2091 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2092 * 2093 * @param altitude GPS altitude in meters. 2094 */ 2095 public void setGpsAltitude(double altitude) { 2096 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2097 } 2098 2099 /** 2100 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2101 * 2102 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2103 * 1970). 2104 */ 2105 public void setGpsTimestamp(long timestamp) { 2106 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2107 } 2108 2109 /** 2110 * Sets GPS processing method. It will store up to 32 characters 2111 * in JPEG EXIF header. 2112 * 2113 * @param processing_method The processing method to get this location. 2114 */ 2115 public void setGpsProcessingMethod(String processing_method) { 2116 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2117 } 2118 2119 /** 2120 * Removes GPS latitude, longitude, altitude, and timestamp from the 2121 * parameters. 2122 */ 2123 public void removeGpsData() { 2124 remove(KEY_GPS_LATITUDE); 2125 remove(KEY_GPS_LONGITUDE); 2126 remove(KEY_GPS_ALTITUDE); 2127 remove(KEY_GPS_TIMESTAMP); 2128 remove(KEY_GPS_PROCESSING_METHOD); 2129 } 2130 2131 /** 2132 * Gets the current white balance setting. 2133 * 2134 * @return current white balance. null if white balance setting is not 2135 * supported. 2136 * @see #WHITE_BALANCE_AUTO 2137 * @see #WHITE_BALANCE_INCANDESCENT 2138 * @see #WHITE_BALANCE_FLUORESCENT 2139 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2140 * @see #WHITE_BALANCE_DAYLIGHT 2141 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2142 * @see #WHITE_BALANCE_TWILIGHT 2143 * @see #WHITE_BALANCE_SHADE 2144 * 2145 */ 2146 public String getWhiteBalance() { 2147 return get(KEY_WHITE_BALANCE); 2148 } 2149 2150 /** 2151 * Sets the white balance. 2152 * 2153 * @param value new white balance. 2154 * @see #getWhiteBalance() 2155 */ 2156 public void setWhiteBalance(String value) { 2157 set(KEY_WHITE_BALANCE, value); 2158 } 2159 2160 /** 2161 * Gets the supported white balance. 2162 * 2163 * @return a list of supported white balance. null if white balance 2164 * setting is not supported. 2165 * @see #getWhiteBalance() 2166 */ 2167 public List<String> getSupportedWhiteBalance() { 2168 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2169 return split(str); 2170 } 2171 2172 /** 2173 * Gets the current color effect setting. 2174 * 2175 * @return current color effect. null if color effect 2176 * setting is not supported. 2177 * @see #EFFECT_NONE 2178 * @see #EFFECT_MONO 2179 * @see #EFFECT_NEGATIVE 2180 * @see #EFFECT_SOLARIZE 2181 * @see #EFFECT_SEPIA 2182 * @see #EFFECT_POSTERIZE 2183 * @see #EFFECT_WHITEBOARD 2184 * @see #EFFECT_BLACKBOARD 2185 * @see #EFFECT_AQUA 2186 */ 2187 public String getColorEffect() { 2188 return get(KEY_EFFECT); 2189 } 2190 2191 /** 2192 * Sets the current color effect setting. 2193 * 2194 * @param value new color effect. 2195 * @see #getColorEffect() 2196 */ 2197 public void setColorEffect(String value) { 2198 set(KEY_EFFECT, value); 2199 } 2200 2201 /** 2202 * Gets the supported color effects. 2203 * 2204 * @return a list of supported color effects. null if color effect 2205 * setting is not supported. 2206 * @see #getColorEffect() 2207 */ 2208 public List<String> getSupportedColorEffects() { 2209 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2210 return split(str); 2211 } 2212 2213 2214 /** 2215 * Gets the current antibanding setting. 2216 * 2217 * @return current antibanding. null if antibanding setting is not 2218 * supported. 2219 * @see #ANTIBANDING_AUTO 2220 * @see #ANTIBANDING_50HZ 2221 * @see #ANTIBANDING_60HZ 2222 * @see #ANTIBANDING_OFF 2223 */ 2224 public String getAntibanding() { 2225 return get(KEY_ANTIBANDING); 2226 } 2227 2228 /** 2229 * Sets the antibanding. 2230 * 2231 * @param antibanding new antibanding value. 2232 * @see #getAntibanding() 2233 */ 2234 public void setAntibanding(String antibanding) { 2235 set(KEY_ANTIBANDING, antibanding); 2236 } 2237 2238 /** 2239 * Gets the supported antibanding values. 2240 * 2241 * @return a list of supported antibanding values. null if antibanding 2242 * setting is not supported. 2243 * @see #getAntibanding() 2244 */ 2245 public List<String> getSupportedAntibanding() { 2246 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2247 return split(str); 2248 } 2249 2250 /** 2251 * Gets the current scene mode setting. 2252 * 2253 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2254 * setting is not supported. 2255 * @see #SCENE_MODE_AUTO 2256 * @see #SCENE_MODE_ACTION 2257 * @see #SCENE_MODE_PORTRAIT 2258 * @see #SCENE_MODE_LANDSCAPE 2259 * @see #SCENE_MODE_NIGHT 2260 * @see #SCENE_MODE_NIGHT_PORTRAIT 2261 * @see #SCENE_MODE_THEATRE 2262 * @see #SCENE_MODE_BEACH 2263 * @see #SCENE_MODE_SNOW 2264 * @see #SCENE_MODE_SUNSET 2265 * @see #SCENE_MODE_STEADYPHOTO 2266 * @see #SCENE_MODE_FIREWORKS 2267 * @see #SCENE_MODE_SPORTS 2268 * @see #SCENE_MODE_PARTY 2269 * @see #SCENE_MODE_CANDLELIGHT 2270 */ 2271 public String getSceneMode() { 2272 return get(KEY_SCENE_MODE); 2273 } 2274 2275 /** 2276 * Sets the scene mode. Changing scene mode may override other 2277 * parameters (such as flash mode, focus mode, white balance). For 2278 * example, suppose originally flash mode is on and supported flash 2279 * modes are on/off. In night scene mode, both flash mode and supported 2280 * flash mode may be changed to off. After setting scene mode, 2281 * applications should call getParameters to know if some parameters are 2282 * changed. 2283 * 2284 * @param value scene mode. 2285 * @see #getSceneMode() 2286 */ 2287 public void setSceneMode(String value) { 2288 set(KEY_SCENE_MODE, value); 2289 } 2290 2291 /** 2292 * Gets the supported scene modes. 2293 * 2294 * @return a list of supported scene modes. null if scene mode setting 2295 * is not supported. 2296 * @see #getSceneMode() 2297 */ 2298 public List<String> getSupportedSceneModes() { 2299 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2300 return split(str); 2301 } 2302 2303 /** 2304 * Gets the current flash mode setting. 2305 * 2306 * @return current flash mode. null if flash mode setting is not 2307 * supported. 2308 * @see #FLASH_MODE_OFF 2309 * @see #FLASH_MODE_AUTO 2310 * @see #FLASH_MODE_ON 2311 * @see #FLASH_MODE_RED_EYE 2312 * @see #FLASH_MODE_TORCH 2313 */ 2314 public String getFlashMode() { 2315 return get(KEY_FLASH_MODE); 2316 } 2317 2318 /** 2319 * Sets the flash mode. 2320 * 2321 * @param value flash mode. 2322 * @see #getFlashMode() 2323 */ 2324 public void setFlashMode(String value) { 2325 set(KEY_FLASH_MODE, value); 2326 } 2327 2328 /** 2329 * Gets the supported flash modes. 2330 * 2331 * @return a list of supported flash modes. null if flash mode setting 2332 * is not supported. 2333 * @see #getFlashMode() 2334 */ 2335 public List<String> getSupportedFlashModes() { 2336 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2337 return split(str); 2338 } 2339 2340 /** 2341 * Gets the current focus mode setting. 2342 * 2343 * @return current focus mode. This method will always return a non-null 2344 * value. Applications should call {@link 2345 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2346 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2347 * @see #FOCUS_MODE_AUTO 2348 * @see #FOCUS_MODE_INFINITY 2349 * @see #FOCUS_MODE_MACRO 2350 * @see #FOCUS_MODE_FIXED 2351 * @see #FOCUS_MODE_EDOF 2352 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2353 */ 2354 public String getFocusMode() { 2355 return get(KEY_FOCUS_MODE); 2356 } 2357 2358 /** 2359 * Sets the focus mode. 2360 * 2361 * @param value focus mode. 2362 * @see #getFocusMode() 2363 */ 2364 public void setFocusMode(String value) { 2365 set(KEY_FOCUS_MODE, value); 2366 } 2367 2368 /** 2369 * Gets the supported focus modes. 2370 * 2371 * @return a list of supported focus modes. This method will always 2372 * return a list with at least one element. 2373 * @see #getFocusMode() 2374 */ 2375 public List<String> getSupportedFocusModes() { 2376 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2377 return split(str); 2378 } 2379 2380 /** 2381 * Gets the focal length (in millimeter) of the camera. 2382 * 2383 * @return the focal length. This method will always return a valid 2384 * value. 2385 */ 2386 public float getFocalLength() { 2387 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2388 } 2389 2390 /** 2391 * Gets the horizontal angle of view in degrees. 2392 * 2393 * @return horizontal angle of view. This method will always return a 2394 * valid value. 2395 */ 2396 public float getHorizontalViewAngle() { 2397 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2398 } 2399 2400 /** 2401 * Gets the vertical angle of view in degrees. 2402 * 2403 * @return vertical angle of view. This method will always return a 2404 * valid value. 2405 */ 2406 public float getVerticalViewAngle() { 2407 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2408 } 2409 2410 /** 2411 * Gets the current exposure compensation index. 2412 * 2413 * @return current exposure compensation index. The range is {@link 2414 * #getMinExposureCompensation} to {@link 2415 * #getMaxExposureCompensation}. 0 means exposure is not 2416 * adjusted. 2417 */ 2418 public int getExposureCompensation() { 2419 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2420 } 2421 2422 /** 2423 * Sets the exposure compensation index. 2424 * 2425 * @param value exposure compensation index. The valid value range is 2426 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2427 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2428 * not adjusted. Application should call 2429 * getMinExposureCompensation and getMaxExposureCompensation to 2430 * know if exposure compensation is supported. 2431 */ 2432 public void setExposureCompensation(int value) { 2433 set(KEY_EXPOSURE_COMPENSATION, value); 2434 } 2435 2436 /** 2437 * Gets the maximum exposure compensation index. 2438 * 2439 * @return maximum exposure compensation index (>=0). If both this 2440 * method and {@link #getMinExposureCompensation} return 0, 2441 * exposure compensation is not supported. 2442 */ 2443 public int getMaxExposureCompensation() { 2444 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2445 } 2446 2447 /** 2448 * Gets the minimum exposure compensation index. 2449 * 2450 * @return minimum exposure compensation index (<=0). If both this 2451 * method and {@link #getMaxExposureCompensation} return 0, 2452 * exposure compensation is not supported. 2453 */ 2454 public int getMinExposureCompensation() { 2455 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2456 } 2457 2458 /** 2459 * Gets the exposure compensation step. 2460 * 2461 * @return exposure compensation step. Applications can get EV by 2462 * multiplying the exposure compensation index and step. Ex: if 2463 * exposure compensation index is -6 and step is 0.333333333, EV 2464 * is -2. 2465 */ 2466 public float getExposureCompensationStep() { 2467 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2468 } 2469 2470 /** 2471 * Sets the auto-exposure lock state. Applications should check 2472 * {@link #isAutoExposureLockSupported} before using this method. 2473 * 2474 * If set to true, the camera auto-exposure routine will pause until the 2475 * lock is set to false. Exposure compensation settings changes will 2476 * still take effect while auto-exposure is locked. Stopping preview 2477 * with {@link #stopPreview()}, or triggering still image capture with 2478 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 2479 * Camera.PictureCallback)}, will automatically set the lock to 2480 * false. However, the lock can be re-enabled before preview is 2481 * re-started to keep the same AE parameters. Exposure compensation, in 2482 * conjunction with re-enabling the AE lock after each still capture, 2483 * can be used to capture an exposure-bracketed burst of images, for 2484 * example. Auto-exposure state, including the lock state, will not be 2485 * maintained after camera {@link #release()} is called. Locking 2486 * auto-exposure after {@link #open()} but before the first call to 2487 * {@link #startPreview()} will not allow the auto-exposure routine to 2488 * run at all, and may result in severely over- or under-exposed images. 2489 * 2490 * The driver may also independently lock auto-exposure after auto-focus 2491 * completes. If this is undesirable, be sure to always set the 2492 * auto-exposure lock to false after the 2493 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2494 * received. The {@link #getAutoExposureLock()} method can be used after 2495 * the callback to determine if the camera has locked auto-exposure 2496 * independently. 2497 * 2498 * @param toggle new state of the auto-exposure lock. True means that 2499 * auto-exposure is locked, false means that the auto-exposure 2500 * routine is free to run normally. 2501 * 2502 * @hide 2503 */ 2504 public void setAutoExposureLock(boolean toggle) { 2505 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 2506 } 2507 2508 /** 2509 * Gets the state of the auto-exposure lock. Applications should check 2510 * {@link #isAutoExposureLockSupported} before using this method. See 2511 * {@link #setAutoExposureLock} for details about the lock. 2512 * 2513 * @return State of the auto-exposure lock. Returns true if 2514 * auto-exposure is currently locked, and false otherwise. The 2515 * auto-exposure lock may be independently enabled by the camera 2516 * subsystem when auto-focus has completed. This method can be 2517 * used after the {@link AutoFocusCallback#onAutoFocus(boolean, 2518 * Camera)} callback to determine if the camera has locked AE. 2519 * 2520 * @see #setAutoExposureLock(boolean) 2521 * 2522 * @hide 2523 */ 2524 public boolean getAutoExposureLock() { 2525 String str = get(KEY_AUTO_EXPOSURE_LOCK); 2526 return TRUE.equals(str); 2527 } 2528 2529 /** 2530 * Returns true if auto-exposure locking is supported. Applications 2531 * should call this before trying to lock auto-exposure. See 2532 * {@link #setAutoExposureLock} for details about the lock. 2533 * 2534 * @return true if auto-exposure lock is supported. 2535 * @see #setAutoExposureLock(boolean) 2536 * 2537 * @hide 2538 */ 2539 public boolean isAutoExposureLockSupported() { 2540 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 2541 return TRUE.equals(str); 2542 } 2543 2544 /** 2545 * Gets current zoom value. This also works when smooth zoom is in 2546 * progress. Applications should check {@link #isZoomSupported} before 2547 * using this method. 2548 * 2549 * @return the current zoom value. The range is 0 to {@link 2550 * #getMaxZoom}. 0 means the camera is not zoomed. 2551 */ 2552 public int getZoom() { 2553 return getInt(KEY_ZOOM, 0); 2554 } 2555 2556 /** 2557 * Sets current zoom value. If the camera is zoomed (value > 0), the 2558 * actual picture size may be smaller than picture size setting. 2559 * Applications can check the actual picture size after picture is 2560 * returned from {@link PictureCallback}. The preview size remains the 2561 * same in zoom. Applications should check {@link #isZoomSupported} 2562 * before using this method. 2563 * 2564 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2565 */ 2566 public void setZoom(int value) { 2567 set(KEY_ZOOM, value); 2568 } 2569 2570 /** 2571 * Returns true if zoom is supported. Applications should call this 2572 * before using other zoom methods. 2573 * 2574 * @return true if zoom is supported. 2575 */ 2576 public boolean isZoomSupported() { 2577 String str = get(KEY_ZOOM_SUPPORTED); 2578 return TRUE.equals(str); 2579 } 2580 2581 /** 2582 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2583 * value that applications can set to {@link #setZoom(int)}. 2584 * Applications should call {@link #isZoomSupported} before using this 2585 * method. This value may change in different preview size. Applications 2586 * should call this again after setting preview size. 2587 * 2588 * @return the maximum zoom value supported by the camera. 2589 */ 2590 public int getMaxZoom() { 2591 return getInt(KEY_MAX_ZOOM, 0); 2592 } 2593 2594 /** 2595 * Gets the zoom ratios of all zoom values. Applications should check 2596 * {@link #isZoomSupported} before using this method. 2597 * 2598 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2599 * returned as 320. The number of elements is {@link 2600 * #getMaxZoom} + 1. The list is sorted from small to large. The 2601 * first element is always 100. The last element is the zoom 2602 * ratio of the maximum zoom value. 2603 */ 2604 public List<Integer> getZoomRatios() { 2605 return splitInt(get(KEY_ZOOM_RATIOS)); 2606 } 2607 2608 /** 2609 * Returns true if smooth zoom is supported. Applications should call 2610 * this before using other smooth zoom methods. 2611 * 2612 * @return true if smooth zoom is supported. 2613 */ 2614 public boolean isSmoothZoomSupported() { 2615 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 2616 return TRUE.equals(str); 2617 } 2618 2619 /** 2620 * Gets the distances from the camera to where an object appears to be 2621 * in focus. The object is sharpest at the optimal focus distance. The 2622 * depth of field is the far focus distance minus near focus distance. 2623 * 2624 * Focus distances may change after calling {@link 2625 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 2626 * #startPreview()}. Applications can call {@link #getParameters()} 2627 * and this method anytime to get the latest focus distances. If the 2628 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 2629 * from time to time. 2630 * 2631 * This method is intended to estimate the distance between the camera 2632 * and the subject. After autofocus, the subject distance may be within 2633 * near and far focus distance. However, the precision depends on the 2634 * camera hardware, autofocus algorithm, the focus area, and the scene. 2635 * The error can be large and it should be only used as a reference. 2636 * 2637 * Far focus distance >= optimal focus distance >= near focus distance. 2638 * If the focus distance is infinity, the value will be 2639 * Float.POSITIVE_INFINITY. 2640 * 2641 * @param output focus distances in meters. output must be a float 2642 * array with three elements. Near focus distance, optimal focus 2643 * distance, and far focus distance will be filled in the array. 2644 * @see #FOCUS_DISTANCE_NEAR_INDEX 2645 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 2646 * @see #FOCUS_DISTANCE_FAR_INDEX 2647 */ 2648 public void getFocusDistances(float[] output) { 2649 if (output == null || output.length != 3) { 2650 throw new IllegalArgumentException( 2651 "output must be an float array with three elements."); 2652 } 2653 splitFloat(get(KEY_FOCUS_DISTANCES), output); 2654 } 2655 2656 /** 2657 * Gets the maximum number of focus areas supported. This is the maximum 2658 * length of the list in {@link #setFocusAreas(List)} and 2659 * {@link #getFocusAreas()}. 2660 * 2661 * @return the maximum number of focus areas supported by the camera. 2662 * @see #getFocusAreas() 2663 */ 2664 public int getMaxNumFocusAreas() { 2665 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 2666 } 2667 2668 /** 2669 * Gets the current focus areas. Camera driver uses the areas to decide 2670 * focus. 2671 * 2672 * Before using this API or {@link #setFocusAreas(List)}, apps should 2673 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 2674 * focus areas first. If the value is 0, focus area is not supported. 2675 * 2676 * Each focus area is a rectangle with specified weight. The direction 2677 * is relative to the sensor orientation, that is, what the sensor sees. 2678 * The direction is not affected by the rotation or mirroring of 2679 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 2680 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 2681 * (1000, 1000) is the lower right point. The length and width of focus 2682 * areas cannot be 0 or negative. 2683 * 2684 * The weight must range from 1 to 1000. The weight should be 2685 * interpreted as a per-pixel weight - all pixels in the area have the 2686 * specified weight. This means a small area with the same weight as a 2687 * larger area will have less influence on the focusing than the larger 2688 * area. Focus areas can partially overlap and the driver will add the 2689 * weights in the overlap region. 2690 * 2691 * A special case of null focus area means driver to decide the focus 2692 * area. For example, the driver may use more signals to decide focus 2693 * areas and change them dynamically. Apps can set all-zero if they want 2694 * the driver to decide focus areas. 2695 * 2696 * Focus areas are relative to the current field of view 2697 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 2698 * represents the top of the currently visible camera frame. The focus 2699 * area cannot be set to be outside the current field of view, even 2700 * when using zoom. 2701 * 2702 * Focus area only has effect if the current focus mode is 2703 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, or 2704 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. 2705 * 2706 * @return a list of current focus areas 2707 */ 2708 public List<Area> getFocusAreas() { 2709 return splitArea(get(KEY_FOCUS_AREAS)); 2710 } 2711 2712 /** 2713 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 2714 * 2715 * @param focusAreas the focus areas 2716 * @see #getFocusAreas() 2717 */ 2718 public void setFocusAreas(List<Area> focusAreas) { 2719 set(KEY_FOCUS_AREAS, focusAreas); 2720 } 2721 2722 /** 2723 * Gets the maximum number of metering areas supported. This is the 2724 * maximum length of the list in {@link #setMeteringAreas(List)} and 2725 * {@link #getMeteringAreas()}. 2726 * 2727 * @return the maximum number of metering areas supported by the camera. 2728 * @see #getMeteringAreas() 2729 */ 2730 public int getMaxNumMeteringAreas() { 2731 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 2732 } 2733 2734 /** 2735 * Gets the current metering areas. Camera driver uses these areas to 2736 * decide exposure. 2737 * 2738 * Before using this API or {@link #setMeteringAreas(List)}, apps should 2739 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 2740 * metering areas first. If the value is 0, metering area is not 2741 * supported. 2742 * 2743 * Each metering area is a rectangle with specified weight. The 2744 * direction is relative to the sensor orientation, that is, what the 2745 * sensor sees. The direction is not affected by the rotation or 2746 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 2747 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 2748 * point. (1000, 1000) is the lower right point. The length and width of 2749 * metering areas cannot be 0 or negative. 2750 * 2751 * The weight must range from 1 to 1000, and represents a weight for 2752 * every pixel in the area. This means that a large metering area with 2753 * the same weight as a smaller area will have more effect in the 2754 * metering result. Metering areas can partially overlap and the driver 2755 * will add the weights in the overlap region. 2756 * 2757 * A special case of null metering area means driver to decide the 2758 * metering area. For example, the driver may use more signals to decide 2759 * metering areas and change them dynamically. Apps can set all-zero if 2760 * they want the driver to decide metering areas. 2761 * 2762 * Metering areas are relative to the current field of view 2763 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 2764 * represents the top of the currently visible camera frame. The 2765 * metering area cannot be set to be outside the current field of view, 2766 * even when using zoom. 2767 * 2768 * No matter what metering areas are, the final exposure are compensated 2769 * by {@link #setExposureCompensation(int)}. 2770 * 2771 * @return a list of current metering areas 2772 */ 2773 public List<Area> getMeteringAreas() { 2774 return splitArea(KEY_METERING_AREAS); 2775 } 2776 2777 /** 2778 * Sets metering areas. See {@link #getMeteringAreas()} for 2779 * documentation. 2780 * 2781 * @param meteringAreas the metering areas 2782 * @see #getMeteringAreas() 2783 */ 2784 public void setMeteringAreas(List<Area> meteringAreas) { 2785 set(KEY_METERING_AREAS, meteringAreas); 2786 } 2787 2788 // Splits a comma delimited string to an ArrayList of String. 2789 // Return null if the passing string is null or the size is 0. 2790 private ArrayList<String> split(String str) { 2791 if (str == null) return null; 2792 2793 // Use StringTokenizer because it is faster than split. 2794 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2795 ArrayList<String> substrings = new ArrayList<String>(); 2796 while (tokenizer.hasMoreElements()) { 2797 substrings.add(tokenizer.nextToken()); 2798 } 2799 return substrings; 2800 } 2801 2802 // Splits a comma delimited string to an ArrayList of Integer. 2803 // Return null if the passing string is null or the size is 0. 2804 private ArrayList<Integer> splitInt(String str) { 2805 if (str == null) return null; 2806 2807 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2808 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2809 while (tokenizer.hasMoreElements()) { 2810 String token = tokenizer.nextToken(); 2811 substrings.add(Integer.parseInt(token)); 2812 } 2813 if (substrings.size() == 0) return null; 2814 return substrings; 2815 } 2816 2817 private void splitInt(String str, int[] output) { 2818 if (str == null) return; 2819 2820 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2821 int index = 0; 2822 while (tokenizer.hasMoreElements()) { 2823 String token = tokenizer.nextToken(); 2824 output[index++] = Integer.parseInt(token); 2825 } 2826 } 2827 2828 // Splits a comma delimited string to an ArrayList of Float. 2829 private void splitFloat(String str, float[] output) { 2830 if (str == null) return; 2831 2832 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2833 int index = 0; 2834 while (tokenizer.hasMoreElements()) { 2835 String token = tokenizer.nextToken(); 2836 output[index++] = Float.parseFloat(token); 2837 } 2838 } 2839 2840 // Returns the value of a float parameter. 2841 private float getFloat(String key, float defaultValue) { 2842 try { 2843 return Float.parseFloat(mMap.get(key)); 2844 } catch (NumberFormatException ex) { 2845 return defaultValue; 2846 } 2847 } 2848 2849 // Returns the value of a integer parameter. 2850 private int getInt(String key, int defaultValue) { 2851 try { 2852 return Integer.parseInt(mMap.get(key)); 2853 } catch (NumberFormatException ex) { 2854 return defaultValue; 2855 } 2856 } 2857 2858 // Splits a comma delimited string to an ArrayList of Size. 2859 // Return null if the passing string is null or the size is 0. 2860 private ArrayList<Size> splitSize(String str) { 2861 if (str == null) return null; 2862 2863 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2864 ArrayList<Size> sizeList = new ArrayList<Size>(); 2865 while (tokenizer.hasMoreElements()) { 2866 Size size = strToSize(tokenizer.nextToken()); 2867 if (size != null) sizeList.add(size); 2868 } 2869 if (sizeList.size() == 0) return null; 2870 return sizeList; 2871 } 2872 2873 // Parses a string (ex: "480x320") to Size object. 2874 // Return null if the passing string is null. 2875 private Size strToSize(String str) { 2876 if (str == null) return null; 2877 2878 int pos = str.indexOf('x'); 2879 if (pos != -1) { 2880 String width = str.substring(0, pos); 2881 String height = str.substring(pos + 1); 2882 return new Size(Integer.parseInt(width), 2883 Integer.parseInt(height)); 2884 } 2885 Log.e(TAG, "Invalid size parameter string=" + str); 2886 return null; 2887 } 2888 2889 // Splits a comma delimited string to an ArrayList of int array. 2890 // Example string: "(10000,26623),(10000,30000)". Return null if the 2891 // passing string is null or the size is 0. 2892 private ArrayList<int[]> splitRange(String str) { 2893 if (str == null || str.charAt(0) != '(' 2894 || str.charAt(str.length() - 1) != ')') { 2895 Log.e(TAG, "Invalid range list string=" + str); 2896 return null; 2897 } 2898 2899 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 2900 int endIndex, fromIndex = 1; 2901 do { 2902 int[] range = new int[2]; 2903 endIndex = str.indexOf("),(", fromIndex); 2904 if (endIndex == -1) endIndex = str.length() - 1; 2905 splitInt(str.substring(fromIndex, endIndex), range); 2906 rangeList.add(range); 2907 fromIndex = endIndex + 3; 2908 } while (endIndex != str.length() - 1); 2909 2910 if (rangeList.size() == 0) return null; 2911 return rangeList; 2912 } 2913 2914 // Splits a comma delimited string to an ArrayList of Area objects. 2915 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 2916 // the passing string is null or the size is 0 or (0,0,0,0,0). 2917 private ArrayList<Area> splitArea(String str) { 2918 if (str == null || str.charAt(0) != '(' 2919 || str.charAt(str.length() - 1) != ')') { 2920 Log.e(TAG, "Invalid area string=" + str); 2921 return null; 2922 } 2923 2924 ArrayList<Area> result = new ArrayList<Area>(); 2925 int endIndex, fromIndex = 1; 2926 int[] array = new int[5]; 2927 do { 2928 endIndex = str.indexOf("),(", fromIndex); 2929 if (endIndex == -1) endIndex = str.length() - 1; 2930 splitInt(str.substring(fromIndex, endIndex), array); 2931 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 2932 result.add(new Area(rect, array[4])); 2933 fromIndex = endIndex + 3; 2934 } while (endIndex != str.length() - 1); 2935 2936 if (result.size() == 0) return null; 2937 2938 if (result.size() == 1) { 2939 Area area = (Area) result.get(0); 2940 Rect rect = area.rect; 2941 if (rect.left == 0 && rect.top == 0 && rect.right == 0 2942 && rect.bottom == 0 && area.weight == 0) { 2943 return null; 2944 } 2945 } 2946 2947 return result; 2948 } 2949 }; 2950} 2951