Camera.java revision 3f4639a6611222ae1ae5493de49213250d292139
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.os.Handler; 31import android.os.Looper; 32import android.os.Message; 33 34/** 35 * The Camera class is used to connect/disconnect with the camera service, 36 * set capture settings, start/stop preview, snap a picture, and retrieve 37 * frames for encoding for video. 38 * <p>There is no default constructor for this class. Use {@link #open()} to 39 * get a Camera object.</p> 40 * 41 * <p>In order to use 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 in order 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 class="caution"><strong>Caution:</strong> Different Android-powered devices 53 * may have different hardware specifications, such as megapixel ratings and 54 * auto-focus capabilities. In order for your application to be compatible with 55 * more devices, you should not make assumptions about the device camera 56 * specifications.</p> 57 */ 58public class Camera { 59 private static final String TAG = "Camera"; 60 61 // These match the enums in frameworks/base/include/ui/Camera.h 62 private static final int CAMERA_MSG_ERROR = 0x001; 63 private static final int CAMERA_MSG_SHUTTER = 0x002; 64 private static final int CAMERA_MSG_FOCUS = 0x004; 65 private static final int CAMERA_MSG_ZOOM = 0x008; 66 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 67 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 68 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 69 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 70 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 71 private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; 72 73 private int mNativeContext; // accessed by native methods 74 private EventHandler mEventHandler; 75 private ShutterCallback mShutterCallback; 76 private PictureCallback mRawImageCallback; 77 private PictureCallback mJpegCallback; 78 private PreviewCallback mPreviewCallback; 79 private PictureCallback mPostviewCallback; 80 private AutoFocusCallback mAutoFocusCallback; 81 private OnZoomChangeListener mZoomListener; 82 private ErrorCallback mErrorCallback; 83 private boolean mOneShot; 84 private boolean mWithBuffer; 85 86 /** 87 * Returns a new Camera object. 88 */ 89 public static Camera open() { 90 return new Camera(); 91 } 92 93 Camera() { 94 mShutterCallback = null; 95 mRawImageCallback = null; 96 mJpegCallback = null; 97 mPreviewCallback = null; 98 mPostviewCallback = null; 99 mZoomListener = null; 100 101 Looper looper; 102 if ((looper = Looper.myLooper()) != null) { 103 mEventHandler = new EventHandler(this, looper); 104 } else if ((looper = Looper.getMainLooper()) != null) { 105 mEventHandler = new EventHandler(this, looper); 106 } else { 107 mEventHandler = null; 108 } 109 110 native_setup(new WeakReference<Camera>(this)); 111 } 112 113 protected void finalize() { 114 native_release(); 115 } 116 117 private native final void native_setup(Object camera_this); 118 private native final void native_release(); 119 120 121 /** 122 * Disconnects and releases the Camera object resources. 123 * <p>It is recommended that you call this as soon as you're done with the 124 * Camera object.</p> 125 */ 126 public final void release() { 127 native_release(); 128 } 129 130 /** 131 * Reconnect to the camera after passing it to MediaRecorder. To save 132 * setup/teardown time, a client of Camera can pass an initialized Camera 133 * object to a MediaRecorder to use for video recording. Once the 134 * MediaRecorder is done with the Camera, this method can be used to 135 * re-establish a connection with the camera hardware. NOTE: The Camera 136 * object must first be unlocked by the process that owns it before it 137 * can be connected to another process. 138 * 139 * @throws IOException if the method fails. 140 */ 141 public native final void reconnect() throws IOException; 142 143 /** 144 * Lock the camera to prevent other processes from accessing it. To save 145 * setup/teardown time, a client of Camera can pass an initialized Camera 146 * object to another process. This method is used to re-lock the Camera 147 * object prevent other processes from accessing it. By default, the 148 * Camera object is locked. Locking it again from the same process will 149 * have no effect. Attempting to lock it from another process if it has 150 * not been unlocked will fail. 151 * 152 * @throws RuntimeException if the method fails. 153 */ 154 public native final void lock(); 155 156 /** 157 * Unlock the camera to allow another process to access it. To save 158 * setup/teardown time, a client of Camera can pass an initialized Camera 159 * object to another process. This method is used to unlock the Camera 160 * object before handing off the Camera object to the other process. 161 * 162 * @throws RuntimeException if the method fails. 163 */ 164 public native final void unlock(); 165 166 /** 167 * Sets the SurfaceHolder to be used for a picture preview. If the surface 168 * changed since the last call, the screen will blank. Nothing happens 169 * if the same surface is re-set. 170 * 171 * @param holder the SurfaceHolder upon which to place the picture preview 172 * @throws IOException if the method fails. 173 */ 174 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 175 if (holder != null) { 176 setPreviewDisplay(holder.getSurface()); 177 } else { 178 setPreviewDisplay((Surface)null); 179 } 180 } 181 182 private native final void setPreviewDisplay(Surface surface); 183 184 /** 185 * Used to get a copy of each preview frame. 186 */ 187 public interface PreviewCallback 188 { 189 /** 190 * The callback that delivers the preview frames. 191 * 192 * @param data The contents of the preview frame in the format defined 193 * by {@link android.graphics.ImageFormat}, which can be queried 194 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 195 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 196 * is never called, the default will be the YCbCr_420_SP 197 * (NV21) format. 198 * @param camera The Camera service object. 199 */ 200 void onPreviewFrame(byte[] data, Camera camera); 201 }; 202 203 /** 204 * Start drawing preview frames to the surface. 205 */ 206 public native final void startPreview(); 207 208 /** 209 * Stop drawing preview frames to the surface. 210 */ 211 public native final void stopPreview(); 212 213 /** 214 * Return current preview state. 215 * 216 * FIXME: Unhide before release 217 * @hide 218 */ 219 public native final boolean previewEnabled(); 220 221 /** 222 * Can be called at any time to instruct the camera to use a callback for 223 * each preview frame in addition to displaying it. 224 * 225 * @param cb A callback object that receives a copy of each preview frame. 226 * Pass null to stop receiving callbacks at any time. 227 */ 228 public final void setPreviewCallback(PreviewCallback cb) { 229 mPreviewCallback = cb; 230 mOneShot = false; 231 mWithBuffer = false; 232 // Always use one-shot mode. We fake camera preview mode by 233 // doing one-shot preview continuously. 234 setHasPreviewCallback(cb != null, false); 235 } 236 237 /** 238 * Installs a callback to retrieve a single preview frame, after which the 239 * callback is cleared. 240 * 241 * @param cb A callback object that receives a copy of the preview frame. 242 */ 243 public final void setOneShotPreviewCallback(PreviewCallback cb) { 244 mPreviewCallback = cb; 245 mOneShot = true; 246 mWithBuffer = false; 247 setHasPreviewCallback(cb != null, false); 248 } 249 250 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 251 252 /** 253 * Installs a callback which will get called as long as there are buffers in the 254 * preview buffer queue, which minimizes dynamic allocation of preview buffers. 255 * 256 * Apps must call addCallbackBuffer to explicitly register the buffers to use, or no callbacks 257 * will be received. addCallbackBuffer may be safely called before or after 258 * a call to setPreviewCallbackWithBuffer with a non-null callback parameter. 259 * 260 * The buffer queue will be cleared upon any calls to setOneShotPreviewCallback, 261 * setPreviewCallback, or to this method with a null callback parameter. 262 * 263 * @param cb A callback object that receives a copy of the preview frame. A null value will clear the queue. 264 */ 265 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 266 mPreviewCallback = cb; 267 mOneShot = false; 268 mWithBuffer = true; 269 setHasPreviewCallback(cb != null, true); 270 } 271 272 /** 273 * Adds a pre-allocated buffer to the preview callback buffer queue. 274 * Applications can add one or more buffers to the queue. When a preview 275 * frame arrives and there is still available buffer, buffer will be filled 276 * and it is removed from the queue. Then preview callback is invoked with 277 * the buffer. If a frame arrives and there is no buffer left, the frame is 278 * discarded. Applications should add the buffers back when they finish the 279 * processing. 280 * 281 * The image format of the callback buffer can be read from {@link 282 * android.hardware.Camera.Parameters#getPreviewFormat()}. bitsPerPixel can 283 * be read from {@link android.graphics.ImageFormat#getBitsPerPixel(int)}. 284 * Preview width and height can be determined from getPreviewSize. 285 * 286 * Alternatively, a buffer from a previous callback may be passed in or used 287 * to determine the size of new preview frame buffers. 288 * 289 * @param callbackBuffer The buffer to register. Size should be width * height * bitsPerPixel / 8. 290 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 291 */ 292 public native final void addCallbackBuffer(byte[] callbackBuffer); 293 294 private class EventHandler extends Handler 295 { 296 private Camera mCamera; 297 298 public EventHandler(Camera c, Looper looper) { 299 super(looper); 300 mCamera = c; 301 } 302 303 @Override 304 public void handleMessage(Message msg) { 305 switch(msg.what) { 306 case CAMERA_MSG_SHUTTER: 307 if (mShutterCallback != null) { 308 mShutterCallback.onShutter(); 309 } 310 return; 311 312 case CAMERA_MSG_RAW_IMAGE: 313 if (mRawImageCallback != null) { 314 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 315 } 316 return; 317 318 case CAMERA_MSG_COMPRESSED_IMAGE: 319 if (mJpegCallback != null) { 320 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 321 } 322 return; 323 324 case CAMERA_MSG_PREVIEW_FRAME: 325 if (mPreviewCallback != null) { 326 PreviewCallback cb = mPreviewCallback; 327 if (mOneShot) { 328 // Clear the callback variable before the callback 329 // in case the app calls setPreviewCallback from 330 // the callback function 331 mPreviewCallback = null; 332 } else if (!mWithBuffer) { 333 // We're faking the camera preview mode to prevent 334 // the app from being flooded with preview frames. 335 // Set to oneshot mode again. 336 setHasPreviewCallback(true, false); 337 } 338 cb.onPreviewFrame((byte[])msg.obj, mCamera); 339 } 340 return; 341 342 case CAMERA_MSG_POSTVIEW_FRAME: 343 if (mPostviewCallback != null) { 344 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 345 } 346 return; 347 348 case CAMERA_MSG_FOCUS: 349 if (mAutoFocusCallback != null) { 350 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 351 } 352 return; 353 354 case CAMERA_MSG_ZOOM: 355 if (mZoomListener != null) { 356 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 357 } 358 return; 359 360 case CAMERA_MSG_ERROR : 361 Log.e(TAG, "Error " + msg.arg1); 362 if (mErrorCallback != null) { 363 mErrorCallback.onError(msg.arg1, mCamera); 364 } 365 return; 366 367 default: 368 Log.e(TAG, "Unknown message type " + msg.what); 369 return; 370 } 371 } 372 } 373 374 private static void postEventFromNative(Object camera_ref, 375 int what, int arg1, int arg2, Object obj) 376 { 377 Camera c = (Camera)((WeakReference)camera_ref).get(); 378 if (c == null) 379 return; 380 381 if (c.mEventHandler != null) { 382 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 383 c.mEventHandler.sendMessage(m); 384 } 385 } 386 387 /** 388 * Handles the callback for the camera auto focus. 389 * <p>Devices that do not support auto-focus will receive a "fake" 390 * callback to this interface. If your application needs auto-focus and 391 * should not be installed on devices <em>without</em> auto-focus, you must 392 * declare that your app uses the 393 * {@code android.hardware.camera.autofocus} feature, in the 394 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 395 * manifest element.</p> 396 */ 397 public interface AutoFocusCallback 398 { 399 /** 400 * Callback for the camera auto focus. If the camera does not support 401 * auto-focus and autoFocus is called, onAutoFocus will be called 402 * immediately with success. 403 * 404 * @param success true if focus was successful, false if otherwise 405 * @param camera the Camera service object 406 */ 407 void onAutoFocus(boolean success, Camera camera); 408 }; 409 410 /** 411 * Starts auto-focus function and registers a callback function to run when 412 * camera is focused. Only valid after startPreview() has been called. 413 * Applications should call {@link 414 * android.hardware.Camera.Parameters#getFocusMode()} to determine if this 415 * method should be called. If the camera does not support auto-focus, it is 416 * a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 417 * callback will be called immediately. 418 * <p>If your application should not be installed 419 * on devices without auto-focus, you must declare that your application 420 * uses auto-focus with the 421 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 422 * manifest element.</p> 423 * <p>If the current flash mode is not 424 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 425 * fired during auto-focus depending on the driver.<p> 426 * 427 * @param cb the callback to run 428 */ 429 public final void autoFocus(AutoFocusCallback cb) 430 { 431 mAutoFocusCallback = cb; 432 native_autoFocus(); 433 } 434 private native final void native_autoFocus(); 435 436 /** 437 * Cancels auto-focus function. If the auto-focus is still in progress, 438 * this function will cancel it. Whether the auto-focus is in progress 439 * or not, this function will return the focus position to the default. 440 * If the camera does not support auto-focus, this is a no-op. 441 */ 442 public final void cancelAutoFocus() 443 { 444 mAutoFocusCallback = null; 445 native_cancelAutoFocus(); 446 } 447 private native final void native_cancelAutoFocus(); 448 449 /** 450 * An interface which contains a callback for the shutter closing after taking a picture. 451 */ 452 public interface ShutterCallback 453 { 454 /** 455 * Can be used to play a shutter sound as soon as the image has been captured, but before 456 * the data is available. 457 */ 458 void onShutter(); 459 } 460 461 /** 462 * Handles the callback for when a picture is taken. 463 */ 464 public interface PictureCallback { 465 /** 466 * Callback for when a picture is taken. 467 * 468 * @param data a byte array of the picture data 469 * @param camera the Camera service object 470 */ 471 void onPictureTaken(byte[] data, Camera camera); 472 }; 473 474 /** 475 * Triggers an asynchronous image capture. The camera service will initiate 476 * a series of callbacks to the application as the image capture progresses. 477 * The shutter callback occurs after the image is captured. This can be used 478 * to trigger a sound to let the user know that image has been captured. The 479 * raw callback occurs when the raw image data is available (NOTE: the data 480 * may be null if the hardware does not have enough memory to make a copy). 481 * The jpeg callback occurs when the compressed image is available. If the 482 * application does not need a particular callback, a null can be passed 483 * instead of a callback method. 484 * 485 * This method will stop the preview. Applications should not call {@link 486 * #stopPreview()} before this. After jpeg callback is received, 487 * applications can call {@link #startPreview()} to restart the preview. 488 * 489 * @param shutter callback after the image is captured, may be null 490 * @param raw callback with raw image data, may be null 491 * @param jpeg callback with jpeg image data, may be null 492 */ 493 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 494 PictureCallback jpeg) { 495 takePicture(shutter, raw, null, jpeg); 496 } 497 private native final void native_takePicture(); 498 499 /** 500 * Triggers an asynchronous image capture. The camera service will initiate 501 * a series of callbacks to the application as the image capture progresses. 502 * The shutter callback occurs after the image is captured. This can be used 503 * to trigger a sound to let the user know that image has been captured. The 504 * raw callback occurs when the raw image data is available (NOTE: the data 505 * may be null if the hardware does not have enough memory to make a copy). 506 * The postview callback occurs when a scaled, fully processed postview 507 * image is available (NOTE: not all hardware supports this). The jpeg 508 * callback occurs when the compressed image is available. If the 509 * application does not need a particular callback, a null can be passed 510 * instead of a callback method. 511 * 512 * This method will stop the preview. Applications should not call {@link 513 * #stopPreview()} before this. After jpeg callback is received, 514 * applications can call {@link #startPreview()} to restart the preview. 515 * 516 * @param shutter callback after the image is captured, may be null 517 * @param raw callback with raw image data, may be null 518 * @param postview callback with postview image data, may be null 519 * @param jpeg callback with jpeg image data, may be null 520 */ 521 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 522 PictureCallback postview, PictureCallback jpeg) { 523 mShutterCallback = shutter; 524 mRawImageCallback = raw; 525 mPostviewCallback = postview; 526 mJpegCallback = jpeg; 527 native_takePicture(); 528 } 529 530 /** 531 * Zooms to the requested value smoothly. Driver will notify {@link 532 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 533 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 534 * is called with value 3. Method onZoomChange will be called three times 535 * with zoom value 1, 2, and 3. The applications can call {@link 536 * #stopSmoothZoom} to stop the zoom earlier. The applications should not 537 * call startSmoothZoom again or change the zoom value before zoom stops. If 538 * the passing zoom value equals to the current zoom value, no zoom callback 539 * will be generated. This method is supported if {@link 540 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 541 * 542 * @param value zoom value. The valid range is 0 to {@link 543 * android.hardware.Camera.Parameters#getMaxZoom}. 544 * @throws IllegalArgumentException if the zoom value is invalid. 545 * @throws RuntimeException if the method fails. 546 */ 547 public native final void startSmoothZoom(int value); 548 549 /** 550 * Stops the smooth zoom. The applications should wait for the {@link 551 * OnZoomChangeListener} to know when the zoom is actually stopped. This 552 * method is supported if {@link 553 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 554 * 555 * @throws RuntimeException if the method fails. 556 */ 557 public native final void stopSmoothZoom(); 558 559 /** 560 * Set the display orientation. This affects the preview frames and the 561 * picture displayed after snapshot. This method is useful for portrait 562 * mode applications. 563 * 564 * This does not affect the order of byte array passed in 565 * {@link PreviewCallback#onPreviewFrame}. This method is not allowed to 566 * be called during preview. 567 * 568 * @param degrees the angle that the picture will be rotated clockwise. 569 * Valid values are 0, 90, 180, and 270. The starting 570 * position is 0 (landscape). 571 */ 572 public native final void setDisplayOrientation(int degrees); 573 574 /** 575 * Interface for a callback to be invoked when zoom value changes. 576 */ 577 public interface OnZoomChangeListener 578 { 579 /** 580 * Called when the zoom value has changed. 581 * 582 * @param zoomValue the current zoom value. In smooth zoom mode, camera 583 * calls this for every new zoom value. 584 * @param stopped whether smooth zoom is stopped. If the value is true, 585 * this is the last zoom update for the application. 586 * 587 * @param camera the Camera service object 588 * @see #startSmoothZoom(int) 589 */ 590 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 591 }; 592 593 /** 594 * Registers a listener to be notified when the zoom value is updated by the 595 * camera driver during smooth zoom. 596 * 597 * @param listener the listener to notify 598 * @see #startSmoothZoom(int) 599 */ 600 public final void setZoomChangeListener(OnZoomChangeListener listener) 601 { 602 mZoomListener = listener; 603 } 604 605 // These match the enum in include/ui/Camera.h 606 /** Unspecified camerar error. @see #ErrorCallback */ 607 public static final int CAMERA_ERROR_UNKNOWN = 1; 608 /** Media server died. In this case, the application must release the 609 * Camera object and instantiate a new one. @see #ErrorCallback */ 610 public static final int CAMERA_ERROR_SERVER_DIED = 100; 611 612 /** 613 * Handles the camera error callback. 614 */ 615 public interface ErrorCallback 616 { 617 /** 618 * Callback for camera errors. 619 * @param error error code: 620 * <ul> 621 * <li>{@link #CAMERA_ERROR_UNKNOWN} 622 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 623 * </ul> 624 * @param camera the Camera service object 625 */ 626 void onError(int error, Camera camera); 627 }; 628 629 /** 630 * Registers a callback to be invoked when an error occurs. 631 * @param cb the callback to run 632 */ 633 public final void setErrorCallback(ErrorCallback cb) 634 { 635 mErrorCallback = cb; 636 } 637 638 private native final void native_setParameters(String params); 639 private native final String native_getParameters(); 640 641 /** 642 * Sets the Parameters for pictures from this Camera service. 643 * 644 * @param params the Parameters to use for this Camera service 645 */ 646 public void setParameters(Parameters params) { 647 native_setParameters(params.flatten()); 648 } 649 650 /** 651 * Returns the picture Parameters for this Camera service. 652 */ 653 public Parameters getParameters() { 654 Parameters p = new Parameters(); 655 String s = native_getParameters(); 656 p.unflatten(s); 657 return p; 658 } 659 660 /** 661 * Handles the picture size (dimensions). 662 */ 663 public class Size { 664 /** 665 * Sets the dimensions for pictures. 666 * 667 * @param w the photo width (pixels) 668 * @param h the photo height (pixels) 669 */ 670 public Size(int w, int h) { 671 width = w; 672 height = h; 673 } 674 /** 675 * Compares {@code obj} to this size. 676 * 677 * @param obj the object to compare this size with. 678 * @return {@code true} if the width and height of {@code obj} is the 679 * same as those of this size. {@code false} otherwise. 680 */ 681 @Override 682 public boolean equals(Object obj) { 683 if (!(obj instanceof Size)) { 684 return false; 685 } 686 Size s = (Size) obj; 687 return width == s.width && height == s.height; 688 } 689 @Override 690 public int hashCode() { 691 return width * 32713 + height; 692 } 693 /** width of the picture */ 694 public int width; 695 /** height of the picture */ 696 public int height; 697 }; 698 699 /** 700 * Handles the parameters for pictures created by a Camera service. 701 * 702 * <p>To make camera parameters take effect, applications have to call 703 * Camera.setParameters. For example, after setWhiteBalance is called, white 704 * balance is not changed until Camera.setParameters() is called. 705 * 706 * <p>Different devices may have different camera capabilities, such as 707 * picture size or flash modes. The application should query the camera 708 * capabilities before setting parameters. For example, the application 709 * should call getSupportedColorEffects before calling setEffect. If the 710 * camera does not support color effects, getSupportedColorEffects will 711 * return null. 712 */ 713 public class Parameters { 714 // Parameter keys to communicate with the camera driver. 715 private static final String KEY_PREVIEW_SIZE = "preview-size"; 716 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 717 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 718 private static final String KEY_PICTURE_SIZE = "picture-size"; 719 private static final String KEY_PICTURE_FORMAT = "picture-format"; 720 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 721 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 722 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 723 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 724 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 725 private static final String KEY_ROTATION = "rotation"; 726 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 727 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 728 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 729 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 730 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 731 private static final String KEY_WHITE_BALANCE = "whitebalance"; 732 private static final String KEY_EFFECT = "effect"; 733 private static final String KEY_ANTIBANDING = "antibanding"; 734 private static final String KEY_SCENE_MODE = "scene-mode"; 735 private static final String KEY_FLASH_MODE = "flash-mode"; 736 private static final String KEY_FOCUS_MODE = "focus-mode"; 737 private static final String KEY_FOCAL_LENGTH = "focal-length"; 738 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 739 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 740 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 741 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 742 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 743 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 744 private static final String KEY_ZOOM = "zoom"; 745 private static final String KEY_MAX_ZOOM = "max-zoom"; 746 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 747 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 748 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 749 // Parameter key suffix for supported values. 750 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 751 752 private static final String TRUE = "true"; 753 754 // Values for white balance settings. 755 public static final String WHITE_BALANCE_AUTO = "auto"; 756 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 757 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 758 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 759 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 760 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 761 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 762 public static final String WHITE_BALANCE_SHADE = "shade"; 763 764 // Values for color effect settings. 765 public static final String EFFECT_NONE = "none"; 766 public static final String EFFECT_MONO = "mono"; 767 public static final String EFFECT_NEGATIVE = "negative"; 768 public static final String EFFECT_SOLARIZE = "solarize"; 769 public static final String EFFECT_SEPIA = "sepia"; 770 public static final String EFFECT_POSTERIZE = "posterize"; 771 public static final String EFFECT_WHITEBOARD = "whiteboard"; 772 public static final String EFFECT_BLACKBOARD = "blackboard"; 773 public static final String EFFECT_AQUA = "aqua"; 774 775 // Values for antibanding settings. 776 public static final String ANTIBANDING_AUTO = "auto"; 777 public static final String ANTIBANDING_50HZ = "50hz"; 778 public static final String ANTIBANDING_60HZ = "60hz"; 779 public static final String ANTIBANDING_OFF = "off"; 780 781 // Values for flash mode settings. 782 /** 783 * Flash will not be fired. 784 */ 785 public static final String FLASH_MODE_OFF = "off"; 786 787 /** 788 * Flash will be fired automatically when required. The flash may be fired 789 * during preview, auto-focus, or snapshot depending on the driver. 790 */ 791 public static final String FLASH_MODE_AUTO = "auto"; 792 793 /** 794 * Flash will always be fired during snapshot. The flash may also be 795 * fired during preview or auto-focus depending on the driver. 796 */ 797 public static final String FLASH_MODE_ON = "on"; 798 799 /** 800 * Flash will be fired in red-eye reduction mode. 801 */ 802 public static final String FLASH_MODE_RED_EYE = "red-eye"; 803 804 /** 805 * Constant emission of light during preview, auto-focus and snapshot. 806 * This can also be used for video recording. 807 */ 808 public static final String FLASH_MODE_TORCH = "torch"; 809 810 // Values for scene mode settings. 811 public static final String SCENE_MODE_AUTO = "auto"; 812 public static final String SCENE_MODE_ACTION = "action"; 813 public static final String SCENE_MODE_PORTRAIT = "portrait"; 814 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 815 public static final String SCENE_MODE_NIGHT = "night"; 816 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 817 public static final String SCENE_MODE_THEATRE = "theatre"; 818 public static final String SCENE_MODE_BEACH = "beach"; 819 public static final String SCENE_MODE_SNOW = "snow"; 820 public static final String SCENE_MODE_SUNSET = "sunset"; 821 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 822 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 823 public static final String SCENE_MODE_SPORTS = "sports"; 824 public static final String SCENE_MODE_PARTY = "party"; 825 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 826 827 // Values for focus mode settings. 828 /** 829 * Auto-focus mode. 830 */ 831 public static final String FOCUS_MODE_AUTO = "auto"; 832 833 /** 834 * Focus is set at infinity. Applications should not call 835 * {@link #autoFocus(AutoFocusCallback)} in this mode. 836 */ 837 public static final String FOCUS_MODE_INFINITY = "infinity"; 838 public static final String FOCUS_MODE_MACRO = "macro"; 839 840 /** 841 * Focus is fixed. The camera is always in this mode if the focus is not 842 * adjustable. If the camera has auto-focus, this mode can fix the 843 * focus, which is usually at hyperfocal distance. Applications should 844 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 845 */ 846 public static final String FOCUS_MODE_FIXED = "fixed"; 847 848 // Formats for setPreviewFormat and setPictureFormat. 849 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 850 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 851 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 852 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 853 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 854 855 private HashMap<String, String> mMap; 856 857 private Parameters() { 858 mMap = new HashMap<String, String>(); 859 } 860 861 /** 862 * Writes the current Parameters to the log. 863 * @hide 864 * @deprecated 865 */ 866 public void dump() { 867 Log.e(TAG, "dump: size=" + mMap.size()); 868 for (String k : mMap.keySet()) { 869 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 870 } 871 } 872 873 /** 874 * Creates a single string with all the parameters set in 875 * this Parameters object. 876 * <p>The {@link #unflatten(String)} method does the reverse.</p> 877 * 878 * @return a String with all values from this Parameters object, in 879 * semi-colon delimited key-value pairs 880 */ 881 public String flatten() { 882 StringBuilder flattened = new StringBuilder(); 883 for (String k : mMap.keySet()) { 884 flattened.append(k); 885 flattened.append("="); 886 flattened.append(mMap.get(k)); 887 flattened.append(";"); 888 } 889 // chop off the extra semicolon at the end 890 flattened.deleteCharAt(flattened.length()-1); 891 return flattened.toString(); 892 } 893 894 /** 895 * Takes a flattened string of parameters and adds each one to 896 * this Parameters object. 897 * <p>The {@link #flatten()} method does the reverse.</p> 898 * 899 * @param flattened a String of parameters (key-value paired) that 900 * are semi-colon delimited 901 */ 902 public void unflatten(String flattened) { 903 mMap.clear(); 904 905 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 906 while (tokenizer.hasMoreElements()) { 907 String kv = tokenizer.nextToken(); 908 int pos = kv.indexOf('='); 909 if (pos == -1) { 910 continue; 911 } 912 String k = kv.substring(0, pos); 913 String v = kv.substring(pos + 1); 914 mMap.put(k, v); 915 } 916 } 917 918 public void remove(String key) { 919 mMap.remove(key); 920 } 921 922 /** 923 * Sets a String parameter. 924 * 925 * @param key the key name for the parameter 926 * @param value the String value of the parameter 927 */ 928 public void set(String key, String value) { 929 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 930 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 931 return; 932 } 933 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 934 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 935 return; 936 } 937 938 mMap.put(key, value); 939 } 940 941 /** 942 * Sets an integer parameter. 943 * 944 * @param key the key name for the parameter 945 * @param value the int value of the parameter 946 */ 947 public void set(String key, int value) { 948 mMap.put(key, Integer.toString(value)); 949 } 950 951 /** 952 * Returns the value of a String parameter. 953 * 954 * @param key the key name for the parameter 955 * @return the String value of the parameter 956 */ 957 public String get(String key) { 958 return mMap.get(key); 959 } 960 961 /** 962 * Returns the value of an integer parameter. 963 * 964 * @param key the key name for the parameter 965 * @return the int value of the parameter 966 */ 967 public int getInt(String key) { 968 return Integer.parseInt(mMap.get(key)); 969 } 970 971 /** 972 * Sets the dimensions for preview pictures. 973 * 974 * @param width the width of the pictures, in pixels 975 * @param height the height of the pictures, in pixels 976 */ 977 public void setPreviewSize(int width, int height) { 978 String v = Integer.toString(width) + "x" + Integer.toString(height); 979 set(KEY_PREVIEW_SIZE, v); 980 } 981 982 /** 983 * Returns the dimensions setting for preview pictures. 984 * 985 * @return a Size object with the height and width setting 986 * for the preview picture 987 */ 988 public Size getPreviewSize() { 989 String pair = get(KEY_PREVIEW_SIZE); 990 return strToSize(pair); 991 } 992 993 /** 994 * Gets the supported preview sizes. 995 * 996 * @return a list of Size object. This method will always return a list 997 * with at least one element. 998 */ 999 public List<Size> getSupportedPreviewSizes() { 1000 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1001 return splitSize(str); 1002 } 1003 1004 /** 1005 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1006 * applications set both width and height to 0, EXIF will not contain 1007 * thumbnail. 1008 * 1009 * @param width the width of the thumbnail, in pixels 1010 * @param height the height of the thumbnail, in pixels 1011 */ 1012 public void setJpegThumbnailSize(int width, int height) { 1013 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1014 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1015 } 1016 1017 /** 1018 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1019 * 1020 * @return a Size object with the height and width setting for the EXIF 1021 * thumbnails 1022 */ 1023 public Size getJpegThumbnailSize() { 1024 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1025 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1026 } 1027 1028 /** 1029 * Gets the supported jpeg thumbnail sizes. 1030 * 1031 * @return a list of Size object. This method will always return a list 1032 * with at least two elements. Size 0,0 (no thumbnail) is always 1033 * supported. 1034 */ 1035 public List<Size> getSupportedJpegThumbnailSizes() { 1036 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1037 return splitSize(str); 1038 } 1039 1040 /** 1041 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1042 * 1043 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1044 * to 100, with 100 being the best. 1045 */ 1046 public void setJpegThumbnailQuality(int quality) { 1047 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1048 } 1049 1050 /** 1051 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1052 * 1053 * @return the JPEG quality setting of the EXIF thumbnail. 1054 */ 1055 public int getJpegThumbnailQuality() { 1056 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1057 } 1058 1059 /** 1060 * Sets Jpeg quality of captured picture. 1061 * 1062 * @param quality the JPEG quality of captured picture. The range is 1 1063 * to 100, with 100 being the best. 1064 */ 1065 public void setJpegQuality(int quality) { 1066 set(KEY_JPEG_QUALITY, quality); 1067 } 1068 1069 /** 1070 * Returns the quality setting for the JPEG picture. 1071 * 1072 * @return the JPEG picture quality setting. 1073 */ 1074 public int getJpegQuality() { 1075 return getInt(KEY_JPEG_QUALITY); 1076 } 1077 1078 /** 1079 * Sets the rate at which preview frames are received. This is the 1080 * target frame rate. The actual frame rate depends on the driver. 1081 * 1082 * @param fps the frame rate (frames per second) 1083 */ 1084 public void setPreviewFrameRate(int fps) { 1085 set(KEY_PREVIEW_FRAME_RATE, fps); 1086 } 1087 1088 /** 1089 * Returns the setting for the rate at which preview frames are 1090 * received. This is the target frame rate. The actual frame rate 1091 * depends on the driver. 1092 * 1093 * @return the frame rate setting (frames per second) 1094 */ 1095 public int getPreviewFrameRate() { 1096 return getInt(KEY_PREVIEW_FRAME_RATE); 1097 } 1098 1099 /** 1100 * Gets the supported preview frame rates. 1101 * 1102 * @return a list of supported preview frame rates. null if preview 1103 * frame rate setting is not supported. 1104 */ 1105 public List<Integer> getSupportedPreviewFrameRates() { 1106 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1107 return splitInt(str); 1108 } 1109 1110 /** 1111 * Sets the image format for preview pictures. 1112 * <p>If this is never called, the default format will be 1113 * {@link android.graphics.ImageFormat#NV21}, which 1114 * uses the NV21 encoding format.</p> 1115 * 1116 * @param pixel_format the desired preview picture format, defined 1117 * by one of the {@link android.graphics.ImageFormat} constants. 1118 * (E.g., <var>ImageFormat.NV21</var> (default), 1119 * <var>ImageFormat.RGB_565</var>, or 1120 * <var>ImageFormat.JPEG</var>) 1121 * @see android.graphics.ImageFormat 1122 */ 1123 public void setPreviewFormat(int pixel_format) { 1124 String s = cameraFormatForPixelFormat(pixel_format); 1125 if (s == null) { 1126 throw new IllegalArgumentException( 1127 "Invalid pixel_format=" + pixel_format); 1128 } 1129 1130 set(KEY_PREVIEW_FORMAT, s); 1131 } 1132 1133 /** 1134 * Returns the image format for preview frames got from 1135 * {@link PreviewCallback}. 1136 * 1137 * @return the preview format. 1138 * @see android.graphics.ImageFormat 1139 */ 1140 public int getPreviewFormat() { 1141 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1142 } 1143 1144 /** 1145 * Gets the supported preview formats. 1146 * 1147 * @return a list of supported preview formats. This method will always 1148 * return a list with at least one element. 1149 * @see android.graphics.ImageFormat 1150 */ 1151 public List<Integer> getSupportedPreviewFormats() { 1152 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1153 ArrayList<Integer> formats = new ArrayList<Integer>(); 1154 for (String s : split(str)) { 1155 int f = pixelFormatForCameraFormat(s); 1156 if (f == ImageFormat.UNKNOWN) continue; 1157 formats.add(f); 1158 } 1159 return formats; 1160 } 1161 1162 /** 1163 * Sets the dimensions for pictures. 1164 * 1165 * @param width the width for pictures, in pixels 1166 * @param height the height for pictures, in pixels 1167 */ 1168 public void setPictureSize(int width, int height) { 1169 String v = Integer.toString(width) + "x" + Integer.toString(height); 1170 set(KEY_PICTURE_SIZE, v); 1171 } 1172 1173 /** 1174 * Returns the dimension setting for pictures. 1175 * 1176 * @return a Size object with the height and width setting 1177 * for pictures 1178 */ 1179 public Size getPictureSize() { 1180 String pair = get(KEY_PICTURE_SIZE); 1181 return strToSize(pair); 1182 } 1183 1184 /** 1185 * Gets the supported picture sizes. 1186 * 1187 * @return a list of supported picture sizes. This method will always 1188 * return a list with at least one element. 1189 */ 1190 public List<Size> getSupportedPictureSizes() { 1191 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1192 return splitSize(str); 1193 } 1194 1195 /** 1196 * Sets the image format for pictures. 1197 * 1198 * @param pixel_format the desired picture format 1199 * (<var>ImageFormat.NV21</var>, 1200 * <var>ImageFormat.RGB_565</var>, or 1201 * <var>ImageFormat.JPEG</var>) 1202 * @see android.graphics.ImageFormat 1203 */ 1204 public void setPictureFormat(int pixel_format) { 1205 String s = cameraFormatForPixelFormat(pixel_format); 1206 if (s == null) { 1207 throw new IllegalArgumentException( 1208 "Invalid pixel_format=" + pixel_format); 1209 } 1210 1211 set(KEY_PICTURE_FORMAT, s); 1212 } 1213 1214 /** 1215 * Returns the image format for pictures. 1216 * 1217 * @return the picture format 1218 * @see android.graphics.ImageFormat 1219 */ 1220 public int getPictureFormat() { 1221 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1222 } 1223 1224 /** 1225 * Gets the supported picture formats. 1226 * 1227 * @return supported picture formats. This method will always return a 1228 * list with at least one element. 1229 * @see android.graphics.ImageFormat 1230 */ 1231 public List<Integer> getSupportedPictureFormats() { 1232 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1233 ArrayList<Integer> formats = new ArrayList<Integer>(); 1234 for (String s : split(str)) { 1235 int f = pixelFormatForCameraFormat(s); 1236 if (f == ImageFormat.UNKNOWN) continue; 1237 formats.add(f); 1238 } 1239 return formats; 1240 } 1241 1242 private String cameraFormatForPixelFormat(int pixel_format) { 1243 switch(pixel_format) { 1244 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1245 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1246 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1247 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1248 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1249 default: return null; 1250 } 1251 } 1252 1253 private int pixelFormatForCameraFormat(String format) { 1254 if (format == null) 1255 return ImageFormat.UNKNOWN; 1256 1257 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1258 return ImageFormat.NV16; 1259 1260 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1261 return ImageFormat.NV21; 1262 1263 if (format.equals(PIXEL_FORMAT_YUV422I)) 1264 return ImageFormat.YUY2; 1265 1266 if (format.equals(PIXEL_FORMAT_RGB565)) 1267 return ImageFormat.RGB_565; 1268 1269 if (format.equals(PIXEL_FORMAT_JPEG)) 1270 return ImageFormat.JPEG; 1271 1272 return ImageFormat.UNKNOWN; 1273 } 1274 1275 /** 1276 * Sets the orientation of the device in degrees. For example, suppose 1277 * the natural position of the device is landscape. If the user takes a 1278 * picture in landscape mode in 2048x1536 resolution, the rotation 1279 * should be set to 0. If the user rotates the phone 90 degrees 1280 * clockwise, the rotation should be set to 90. Applications can use 1281 * {@link android.view.OrientationEventListener} to set this parameter. 1282 * 1283 * The camera driver may set orientation in the EXIF header without 1284 * rotating the picture. Or the driver may rotate the picture and 1285 * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation 1286 * in the EXIF header will be missing or 1 (row #0 is top and column #0 1287 * is left side). 1288 * 1289 * @param rotation The orientation of the device in degrees. Rotation 1290 * can only be 0, 90, 180 or 270. 1291 * @throws IllegalArgumentException if rotation value is invalid. 1292 * @see android.view.OrientationEventListener 1293 */ 1294 public void setRotation(int rotation) { 1295 if (rotation == 0 || rotation == 90 || rotation == 180 1296 || rotation == 270) { 1297 set(KEY_ROTATION, Integer.toString(rotation)); 1298 } else { 1299 throw new IllegalArgumentException( 1300 "Invalid rotation=" + rotation); 1301 } 1302 } 1303 1304 /** 1305 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1306 * header. 1307 * 1308 * @param latitude GPS latitude coordinate. 1309 */ 1310 public void setGpsLatitude(double latitude) { 1311 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1312 } 1313 1314 /** 1315 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1316 * header. 1317 * 1318 * @param longitude GPS longitude coordinate. 1319 */ 1320 public void setGpsLongitude(double longitude) { 1321 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1322 } 1323 1324 /** 1325 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1326 * 1327 * @param altitude GPS altitude in meters. 1328 */ 1329 public void setGpsAltitude(double altitude) { 1330 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1331 } 1332 1333 /** 1334 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1335 * 1336 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1337 * 1970). 1338 */ 1339 public void setGpsTimestamp(long timestamp) { 1340 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1341 } 1342 1343 /** 1344 * Sets GPS processing method. It will store up to 32 characters 1345 * in JPEG EXIF header. 1346 * 1347 * @param processing_method The processing method to get this location. 1348 */ 1349 public void setGpsProcessingMethod(String processing_method) { 1350 set(KEY_GPS_PROCESSING_METHOD, processing_method); 1351 } 1352 1353 /** 1354 * Removes GPS latitude, longitude, altitude, and timestamp from the 1355 * parameters. 1356 */ 1357 public void removeGpsData() { 1358 remove(KEY_GPS_LATITUDE); 1359 remove(KEY_GPS_LONGITUDE); 1360 remove(KEY_GPS_ALTITUDE); 1361 remove(KEY_GPS_TIMESTAMP); 1362 remove(KEY_GPS_PROCESSING_METHOD); 1363 } 1364 1365 /** 1366 * Gets the current white balance setting. 1367 * 1368 * @return current white balance. null if white balance setting is not 1369 * supported. 1370 * @see #WHITE_BALANCE_AUTO 1371 * @see #WHITE_BALANCE_INCANDESCENT 1372 * @see #WHITE_BALANCE_FLUORESCENT 1373 * @see #WHITE_BALANCE_WARM_FLUORESCENT 1374 * @see #WHITE_BALANCE_DAYLIGHT 1375 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 1376 * @see #WHITE_BALANCE_TWILIGHT 1377 * @see #WHITE_BALANCE_SHADE 1378 * 1379 */ 1380 public String getWhiteBalance() { 1381 return get(KEY_WHITE_BALANCE); 1382 } 1383 1384 /** 1385 * Sets the white balance. 1386 * 1387 * @param value new white balance. 1388 * @see #getWhiteBalance() 1389 */ 1390 public void setWhiteBalance(String value) { 1391 set(KEY_WHITE_BALANCE, value); 1392 } 1393 1394 /** 1395 * Gets the supported white balance. 1396 * 1397 * @return a list of supported white balance. null if white balance 1398 * setting is not supported. 1399 * @see #getWhiteBalance() 1400 */ 1401 public List<String> getSupportedWhiteBalance() { 1402 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 1403 return split(str); 1404 } 1405 1406 /** 1407 * Gets the current color effect setting. 1408 * 1409 * @return current color effect. null if color effect 1410 * setting is not supported. 1411 * @see #EFFECT_NONE 1412 * @see #EFFECT_MONO 1413 * @see #EFFECT_NEGATIVE 1414 * @see #EFFECT_SOLARIZE 1415 * @see #EFFECT_SEPIA 1416 * @see #EFFECT_POSTERIZE 1417 * @see #EFFECT_WHITEBOARD 1418 * @see #EFFECT_BLACKBOARD 1419 * @see #EFFECT_AQUA 1420 */ 1421 public String getColorEffect() { 1422 return get(KEY_EFFECT); 1423 } 1424 1425 /** 1426 * Sets the current color effect setting. 1427 * 1428 * @param value new color effect. 1429 * @see #getColorEffect() 1430 */ 1431 public void setColorEffect(String value) { 1432 set(KEY_EFFECT, value); 1433 } 1434 1435 /** 1436 * Gets the supported color effects. 1437 * 1438 * @return a list of supported color effects. null if color effect 1439 * setting is not supported. 1440 * @see #getColorEffect() 1441 */ 1442 public List<String> getSupportedColorEffects() { 1443 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 1444 return split(str); 1445 } 1446 1447 1448 /** 1449 * Gets the current antibanding setting. 1450 * 1451 * @return current antibanding. null if antibanding setting is not 1452 * supported. 1453 * @see #ANTIBANDING_AUTO 1454 * @see #ANTIBANDING_50HZ 1455 * @see #ANTIBANDING_60HZ 1456 * @see #ANTIBANDING_OFF 1457 */ 1458 public String getAntibanding() { 1459 return get(KEY_ANTIBANDING); 1460 } 1461 1462 /** 1463 * Sets the antibanding. 1464 * 1465 * @param antibanding new antibanding value. 1466 * @see #getAntibanding() 1467 */ 1468 public void setAntibanding(String antibanding) { 1469 set(KEY_ANTIBANDING, antibanding); 1470 } 1471 1472 /** 1473 * Gets the supported antibanding values. 1474 * 1475 * @return a list of supported antibanding values. null if antibanding 1476 * setting is not supported. 1477 * @see #getAntibanding() 1478 */ 1479 public List<String> getSupportedAntibanding() { 1480 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 1481 return split(str); 1482 } 1483 1484 /** 1485 * Gets the current scene mode setting. 1486 * 1487 * @return one of SCENE_MODE_XXX string constant. null if scene mode 1488 * setting is not supported. 1489 * @see #SCENE_MODE_AUTO 1490 * @see #SCENE_MODE_ACTION 1491 * @see #SCENE_MODE_PORTRAIT 1492 * @see #SCENE_MODE_LANDSCAPE 1493 * @see #SCENE_MODE_NIGHT 1494 * @see #SCENE_MODE_NIGHT_PORTRAIT 1495 * @see #SCENE_MODE_THEATRE 1496 * @see #SCENE_MODE_BEACH 1497 * @see #SCENE_MODE_SNOW 1498 * @see #SCENE_MODE_SUNSET 1499 * @see #SCENE_MODE_STEADYPHOTO 1500 * @see #SCENE_MODE_FIREWORKS 1501 * @see #SCENE_MODE_SPORTS 1502 * @see #SCENE_MODE_PARTY 1503 * @see #SCENE_MODE_CANDLELIGHT 1504 */ 1505 public String getSceneMode() { 1506 return get(KEY_SCENE_MODE); 1507 } 1508 1509 /** 1510 * Sets the scene mode. Other parameters may be changed after changing 1511 * scene mode. For example, flash and supported flash mode may be 1512 * changed to "off" in night scene mode. After setting scene mode, 1513 * applications should call getParameters to know if some parameters are 1514 * changed. 1515 * 1516 * @param value scene mode. 1517 * @see #getSceneMode() 1518 */ 1519 public void setSceneMode(String value) { 1520 set(KEY_SCENE_MODE, value); 1521 } 1522 1523 /** 1524 * Gets the supported scene modes. 1525 * 1526 * @return a list of supported scene modes. null if scene mode setting 1527 * is not supported. 1528 * @see #getSceneMode() 1529 */ 1530 public List<String> getSupportedSceneModes() { 1531 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 1532 return split(str); 1533 } 1534 1535 /** 1536 * Gets the current flash mode setting. 1537 * 1538 * @return current flash mode. null if flash mode setting is not 1539 * supported. 1540 * @see #FLASH_MODE_OFF 1541 * @see #FLASH_MODE_AUTO 1542 * @see #FLASH_MODE_ON 1543 * @see #FLASH_MODE_RED_EYE 1544 * @see #FLASH_MODE_TORCH 1545 */ 1546 public String getFlashMode() { 1547 return get(KEY_FLASH_MODE); 1548 } 1549 1550 /** 1551 * Sets the flash mode. 1552 * 1553 * @param value flash mode. 1554 * @see #getFlashMode() 1555 */ 1556 public void setFlashMode(String value) { 1557 set(KEY_FLASH_MODE, value); 1558 } 1559 1560 /** 1561 * Gets the supported flash modes. 1562 * 1563 * @return a list of supported flash modes. null if flash mode setting 1564 * is not supported. 1565 * @see #getFlashMode() 1566 */ 1567 public List<String> getSupportedFlashModes() { 1568 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 1569 return split(str); 1570 } 1571 1572 /** 1573 * Gets the current focus mode setting. 1574 * 1575 * @return current focus mode. If the camera does not support 1576 * auto-focus, this should return {@link #FOCUS_MODE_FIXED}. If 1577 * the focus mode is not FOCUS_MODE_FIXED or {@link 1578 * #FOCUS_MODE_INFINITY}, applications should call {@link 1579 * #autoFocus(AutoFocusCallback)} to start the focus. 1580 * @see #FOCUS_MODE_AUTO 1581 * @see #FOCUS_MODE_INFINITY 1582 * @see #FOCUS_MODE_MACRO 1583 * @see #FOCUS_MODE_FIXED 1584 */ 1585 public String getFocusMode() { 1586 return get(KEY_FOCUS_MODE); 1587 } 1588 1589 /** 1590 * Sets the focus mode. 1591 * 1592 * @param value focus mode. 1593 * @see #getFocusMode() 1594 */ 1595 public void setFocusMode(String value) { 1596 set(KEY_FOCUS_MODE, value); 1597 } 1598 1599 /** 1600 * Gets the supported focus modes. 1601 * 1602 * @return a list of supported focus modes. This method will always 1603 * return a list with at least one element. 1604 * @see #getFocusMode() 1605 */ 1606 public List<String> getSupportedFocusModes() { 1607 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 1608 return split(str); 1609 } 1610 1611 /** 1612 * Gets the focal length (in millimeter) of the camera. 1613 * 1614 * @return the focal length. This method will always return a valid 1615 * value. 1616 */ 1617 public float getFocalLength() { 1618 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 1619 } 1620 1621 /** 1622 * Gets the horizontal angle of view in degrees. 1623 * 1624 * @return horizontal angle of view. This method will always return a 1625 * valid value. 1626 */ 1627 public float getHorizontalViewAngle() { 1628 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 1629 } 1630 1631 /** 1632 * Gets the vertical angle of view in degrees. 1633 * 1634 * @return vertical angle of view. This method will always return a 1635 * valid value. 1636 */ 1637 public float getVerticalViewAngle() { 1638 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 1639 } 1640 1641 /** 1642 * Gets the current exposure compensation index. 1643 * 1644 * @return current exposure compensation index. The range is {@link 1645 * #getMinExposureCompensation} to {@link 1646 * #getMaxExposureCompensation}. 0 means exposure is not 1647 * adjusted. 1648 */ 1649 public int getExposureCompensation() { 1650 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 1651 } 1652 1653 /** 1654 * Sets the exposure compensation index. 1655 * 1656 * @param value exposure compensation index. The valid value range is 1657 * from {@link #getMinExposureCompensation} (inclusive) to {@link 1658 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 1659 * not adjusted. Application should call 1660 * getMinExposureCompensation and getMaxExposureCompensation to 1661 * know if exposure compensation is supported. 1662 */ 1663 public void setExposureCompensation(int value) { 1664 set(KEY_EXPOSURE_COMPENSATION, value); 1665 } 1666 1667 /** 1668 * Gets the maximum exposure compensation index. 1669 * 1670 * @return maximum exposure compensation index (>=0). If both this 1671 * method and {@link #getMinExposureCompensation} return 0, 1672 * exposure compensation is not supported. 1673 */ 1674 public int getMaxExposureCompensation() { 1675 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 1676 } 1677 1678 /** 1679 * Gets the minimum exposure compensation index. 1680 * 1681 * @return minimum exposure compensation index (<=0). If both this 1682 * method and {@link #getMaxExposureCompensation} return 0, 1683 * exposure compensation is not supported. 1684 */ 1685 public int getMinExposureCompensation() { 1686 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 1687 } 1688 1689 /** 1690 * Gets the exposure compensation step. 1691 * 1692 * @return exposure compensation step. Applications can get EV by 1693 * multiplying the exposure compensation index and step. Ex: if 1694 * exposure compensation index is -6 and step is 0.333333333, EV 1695 * is -2. 1696 */ 1697 public float getExposureCompensationStep() { 1698 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 1699 } 1700 1701 /** 1702 * Gets current zoom value. This also works when smooth zoom is in 1703 * progress. Applications should check {@link #isZoomSupported} before 1704 * using this method. 1705 * 1706 * @return the current zoom value. The range is 0 to {@link 1707 * #getMaxZoom}. 0 means the camera is not zoomed. 1708 */ 1709 public int getZoom() { 1710 return getInt(KEY_ZOOM, 0); 1711 } 1712 1713 /** 1714 * Sets current zoom value. If the camera is zoomed (value > 0), the 1715 * actual picture size may be smaller than picture size setting. 1716 * Applications can check the actual picture size after picture is 1717 * returned from {@link PictureCallback}. The preview size remains the 1718 * same in zoom. Applications should check {@link #isZoomSupported} 1719 * before using this method. 1720 * 1721 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 1722 */ 1723 public void setZoom(int value) { 1724 set(KEY_ZOOM, value); 1725 } 1726 1727 /** 1728 * Returns true if zoom is supported. Applications should call this 1729 * before using other zoom methods. 1730 * 1731 * @return true if zoom is supported. 1732 */ 1733 public boolean isZoomSupported() { 1734 String str = get(KEY_ZOOM_SUPPORTED); 1735 return TRUE.equals(str); 1736 } 1737 1738 /** 1739 * Gets the maximum zoom value allowed for snapshot. This is the maximum 1740 * value that applications can set to {@link #setZoom(int)}. 1741 * Applications should call {@link #isZoomSupported} before using this 1742 * method. This value may change in different preview size. Applications 1743 * should call this again after setting preview size. 1744 * 1745 * @return the maximum zoom value supported by the camera. 1746 */ 1747 public int getMaxZoom() { 1748 return getInt(KEY_MAX_ZOOM, 0); 1749 } 1750 1751 /** 1752 * Gets the zoom ratios of all zoom values. Applications should check 1753 * {@link #isZoomSupported} before using this method. 1754 * 1755 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 1756 * returned as 320. The number of elements is {@link 1757 * #getMaxZoom} + 1. The list is sorted from small to large. The 1758 * first element is always 100. The last element is the zoom 1759 * ratio of the maximum zoom value. 1760 */ 1761 public List<Integer> getZoomRatios() { 1762 return splitInt(get(KEY_ZOOM_RATIOS)); 1763 } 1764 1765 /** 1766 * Returns true if smooth zoom is supported. Applications should call 1767 * this before using other smooth zoom methods. 1768 * 1769 * @return true if smooth zoom is supported. 1770 */ 1771 public boolean isSmoothZoomSupported() { 1772 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 1773 return TRUE.equals(str); 1774 } 1775 1776 // Splits a comma delimited string to an ArrayList of String. 1777 // Return null if the passing string is null or the size is 0. 1778 private ArrayList<String> split(String str) { 1779 if (str == null) return null; 1780 1781 // Use StringTokenizer because it is faster than split. 1782 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1783 ArrayList<String> substrings = new ArrayList<String>(); 1784 while (tokenizer.hasMoreElements()) { 1785 substrings.add(tokenizer.nextToken()); 1786 } 1787 return substrings; 1788 } 1789 1790 // Splits a comma delimited string to an ArrayList of Integer. 1791 // Return null if the passing string is null or the size is 0. 1792 private ArrayList<Integer> splitInt(String str) { 1793 if (str == null) return null; 1794 1795 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1796 ArrayList<Integer> substrings = new ArrayList<Integer>(); 1797 while (tokenizer.hasMoreElements()) { 1798 String token = tokenizer.nextToken(); 1799 substrings.add(Integer.parseInt(token)); 1800 } 1801 if (substrings.size() == 0) return null; 1802 return substrings; 1803 } 1804 1805 // Returns the value of a float parameter. 1806 private float getFloat(String key, float defaultValue) { 1807 try { 1808 return Float.parseFloat(mMap.get(key)); 1809 } catch (NumberFormatException ex) { 1810 return defaultValue; 1811 } 1812 } 1813 1814 // Returns the value of a integer parameter. 1815 private int getInt(String key, int defaultValue) { 1816 try { 1817 return Integer.parseInt(mMap.get(key)); 1818 } catch (NumberFormatException ex) { 1819 return defaultValue; 1820 } 1821 } 1822 1823 // Splits a comma delimited string to an ArrayList of Size. 1824 // Return null if the passing string is null or the size is 0. 1825 private ArrayList<Size> splitSize(String str) { 1826 if (str == null) return null; 1827 1828 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1829 ArrayList<Size> sizeList = new ArrayList<Size>(); 1830 while (tokenizer.hasMoreElements()) { 1831 Size size = strToSize(tokenizer.nextToken()); 1832 if (size != null) sizeList.add(size); 1833 } 1834 if (sizeList.size() == 0) return null; 1835 return sizeList; 1836 } 1837 1838 // Parses a string (ex: "480x320") to Size object. 1839 // Return null if the passing string is null. 1840 private Size strToSize(String str) { 1841 if (str == null) return null; 1842 1843 int pos = str.indexOf('x'); 1844 if (pos != -1) { 1845 String width = str.substring(0, pos); 1846 String height = str.substring(pos + 1); 1847 return new Size(Integer.parseInt(width), 1848 Integer.parseInt(height)); 1849 } 1850 Log.e(TAG, "Invalid size parameter string=" + str); 1851 return null; 1852 } 1853 }; 1854} 1855