Camera.java revision 24b326a8978bf78e3e560723dde221792784325b
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 ZoomCallback mZoomCallback; 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 mZoomCallback = 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 * @hide 142 */ 143 public native final void reconnect() throws IOException; 144 145 /** 146 * Lock the camera to prevent other processes from accessing it. To save 147 * setup/teardown time, a client of Camera can pass an initialized Camera 148 * object to another process. This method is used to re-lock the Camera 149 * object prevent other processes from accessing it. By default, the 150 * Camera object is locked. Locking it again from the same process will 151 * have no effect. Attempting to lock it from another process if it has 152 * not been unlocked will fail. 153 * 154 * @throws RuntimeException if the method fails. 155 */ 156 public native final void lock(); 157 158 /** 159 * Unlock the camera to allow another process to access it. To save 160 * setup/teardown time, a client of Camera can pass an initialized Camera 161 * object to another process. This method is used to unlock the Camera 162 * object before handing off the Camera object to the other process. 163 * 164 * @throws RuntimeException if the method fails. 165 */ 166 public native final void unlock(); 167 168 /** 169 * Sets the SurfaceHolder to be used for a picture preview. If the surface 170 * changed since the last call, the screen will blank. Nothing happens 171 * if the same surface is re-set. 172 * 173 * @param holder the SurfaceHolder upon which to place the picture preview 174 * @throws IOException if the method fails. 175 */ 176 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 177 if (holder != null) { 178 setPreviewDisplay(holder.getSurface()); 179 } else { 180 setPreviewDisplay((Surface)null); 181 } 182 } 183 184 private native final void setPreviewDisplay(Surface surface); 185 186 /** 187 * Used to get a copy of each preview frame. 188 */ 189 public interface PreviewCallback 190 { 191 /** 192 * The callback that delivers the preview frames. 193 * 194 * @param data The contents of the preview frame in the format defined 195 * by {@link android.graphics.ImageFormat}, which can be queried 196 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 197 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 198 * is never called, the default will be the YCbCr_420_SP 199 * (NV21) format. 200 * @param camera The Camera service object. 201 */ 202 void onPreviewFrame(byte[] data, Camera camera); 203 }; 204 205 /** 206 * Start drawing preview frames to the surface. 207 */ 208 public native final void startPreview(); 209 210 /** 211 * Stop drawing preview frames to the surface. 212 */ 213 public native final void stopPreview(); 214 215 /** 216 * Return current preview state. 217 * 218 * FIXME: Unhide before release 219 * @hide 220 */ 221 public native final boolean previewEnabled(); 222 223 /** 224 * Can be called at any time to instruct the camera to use a callback for 225 * each preview frame in addition to displaying it. 226 * 227 * @param cb A callback object that receives a copy of each preview frame. 228 * Pass null to stop receiving callbacks at any time. 229 */ 230 public final void setPreviewCallback(PreviewCallback cb) { 231 mPreviewCallback = cb; 232 mOneShot = false; 233 mWithBuffer = false; 234 // Always use one-shot mode. We fake camera preview mode by 235 // doing one-shot preview continuously. 236 setHasPreviewCallback(cb != null, false); 237 } 238 239 /** 240 * Installs a callback to retrieve a single preview frame, after which the 241 * callback is cleared. 242 * 243 * @param cb A callback object that receives a copy of the preview frame. 244 */ 245 public final void setOneShotPreviewCallback(PreviewCallback cb) { 246 mPreviewCallback = cb; 247 mOneShot = true; 248 mWithBuffer = false; 249 setHasPreviewCallback(cb != null, false); 250 } 251 252 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 253 254 /** 255 * Installs a callback which will get called as long as there are buffers in the 256 * preview buffer queue, which minimizes dynamic allocation of preview buffers. 257 * 258 * Apps must call addCallbackBuffer to explicitly register the buffers to use, or no callbacks 259 * will be received. addCallbackBuffer may be safely called before or after 260 * a call to setPreviewCallbackWithBuffer with a non-null callback parameter. 261 * 262 * The buffer queue will be cleared upon any calls to setOneShotPreviewCallback, 263 * setPreviewCallback, or to this method with a null callback parameter. 264 * 265 * @param cb A callback object that receives a copy of the preview frame. A null value will clear the queue. 266 * @hide 267 */ 268 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 269 mPreviewCallback = cb; 270 mOneShot = false; 271 mWithBuffer = true; 272 setHasPreviewCallback(cb != null, true); 273 } 274 275 /** 276 * Adds a pre-allocated buffer to the callback buffer queue. 277 * Preview width and height can be determined from getPreviewSize, and bitsPerPixel can be 278 * found from from {@link android.hardware.Camera.Parameters#getPreviewFormat()} and 279 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} 280 * 281 * Alternatively, a buffer from a previous callback may be passed in or used 282 * to determine the size of new preview frame buffers. 283 * 284 * @param callbackBuffer The buffer to register. Size should be width * height * bitsPerPixel / 8. 285 * @hide 286 */ 287 public native final void addCallbackBuffer(byte[] callbackBuffer); 288 289 private class EventHandler extends Handler 290 { 291 private Camera mCamera; 292 293 public EventHandler(Camera c, Looper looper) { 294 super(looper); 295 mCamera = c; 296 } 297 298 @Override 299 public void handleMessage(Message msg) { 300 switch(msg.what) { 301 case CAMERA_MSG_SHUTTER: 302 if (mShutterCallback != null) { 303 mShutterCallback.onShutter(); 304 } 305 return; 306 307 case CAMERA_MSG_RAW_IMAGE: 308 if (mRawImageCallback != null) { 309 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 310 } 311 return; 312 313 case CAMERA_MSG_COMPRESSED_IMAGE: 314 if (mJpegCallback != null) { 315 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 316 } 317 return; 318 319 case CAMERA_MSG_PREVIEW_FRAME: 320 if (mPreviewCallback != null) { 321 PreviewCallback cb = mPreviewCallback; 322 if (mOneShot) { 323 // Clear the callback variable before the callback 324 // in case the app calls setPreviewCallback from 325 // the callback function 326 mPreviewCallback = null; 327 } else if (!mWithBuffer) { 328 // We're faking the camera preview mode to prevent 329 // the app from being flooded with preview frames. 330 // Set to oneshot mode again. 331 setHasPreviewCallback(true, false); 332 } 333 cb.onPreviewFrame((byte[])msg.obj, mCamera); 334 } 335 return; 336 337 case CAMERA_MSG_POSTVIEW_FRAME: 338 if (mPostviewCallback != null) { 339 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 340 } 341 return; 342 343 case CAMERA_MSG_FOCUS: 344 if (mAutoFocusCallback != null) { 345 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 346 } 347 return; 348 349 case CAMERA_MSG_ZOOM: 350 if (mZoomCallback != null) { 351 mZoomCallback.onZoomUpdate(msg.arg1, msg.arg2 != 0, mCamera); 352 } 353 return; 354 355 case CAMERA_MSG_ERROR : 356 Log.e(TAG, "Error " + msg.arg1); 357 if (mErrorCallback != null) { 358 mErrorCallback.onError(msg.arg1, mCamera); 359 } 360 return; 361 362 default: 363 Log.e(TAG, "Unknown message type " + msg.what); 364 return; 365 } 366 } 367 } 368 369 private static void postEventFromNative(Object camera_ref, 370 int what, int arg1, int arg2, Object obj) 371 { 372 Camera c = (Camera)((WeakReference)camera_ref).get(); 373 if (c == null) 374 return; 375 376 if (c.mEventHandler != null) { 377 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 378 c.mEventHandler.sendMessage(m); 379 } 380 } 381 382 /** 383 * Handles the callback for the camera auto focus. 384 * <p>Devices that do not support auto-focus will receive a "fake" 385 * callback to this interface. If your application needs auto-focus and 386 * should not be installed on devices <em>without</em> auto-focus, you must 387 * declare that your app uses the 388 * {@code android.hardware.camera.autofocus} feature, in the 389 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 390 * manifest element.</p> 391 */ 392 public interface AutoFocusCallback 393 { 394 /** 395 * Callback for the camera auto focus. If the camera does not support 396 * auto-focus and autoFocus is called, onAutoFocus will be called 397 * immediately with success. 398 * 399 * @param success true if focus was successful, false if otherwise 400 * @param camera the Camera service object 401 */ 402 void onAutoFocus(boolean success, Camera camera); 403 }; 404 405 /** 406 * Starts auto-focus function and registers a callback function to run when 407 * camera is focused. Only valid after startPreview() has been called. 408 * Applications should call {@link 409 * android.hardware.Camera.Parameters#getFocusMode()} to determine if this 410 * method should be called. If the camera does not support auto-focus, it is 411 * a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 412 * callback will be called immediately. 413 * <p>If your application should not be installed 414 * on devices without auto-focus, you must declare that your application 415 * uses auto-focus with the 416 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 417 * manifest element.</p> 418 * <p>If the current flash mode is not 419 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 420 * fired during auto-focus depending on the driver.<p> 421 * 422 * @param cb the callback to run 423 */ 424 public final void autoFocus(AutoFocusCallback cb) 425 { 426 mAutoFocusCallback = cb; 427 native_autoFocus(); 428 } 429 private native final void native_autoFocus(); 430 431 /** 432 * Cancels auto-focus function. If the auto-focus is still in progress, 433 * this function will cancel it. Whether the auto-focus is in progress 434 * or not, this function will return the focus position to the default. 435 * If the camera does not support auto-focus, this is a no-op. 436 */ 437 public final void cancelAutoFocus() 438 { 439 mAutoFocusCallback = null; 440 native_cancelAutoFocus(); 441 } 442 private native final void native_cancelAutoFocus(); 443 444 /** 445 * An interface which contains a callback for the shutter closing after taking a picture. 446 */ 447 public interface ShutterCallback 448 { 449 /** 450 * Can be used to play a shutter sound as soon as the image has been captured, but before 451 * the data is available. 452 */ 453 void onShutter(); 454 } 455 456 /** 457 * Handles the callback for when a picture is taken. 458 */ 459 public interface PictureCallback { 460 /** 461 * Callback for when a picture is taken. 462 * 463 * @param data a byte array of the picture data 464 * @param camera the Camera service object 465 */ 466 void onPictureTaken(byte[] data, Camera camera); 467 }; 468 469 /** 470 * Triggers an asynchronous image capture. The camera service will initiate 471 * a series of callbacks to the application as the image capture progresses. 472 * The shutter callback occurs after the image is captured. This can be used 473 * to trigger a sound to let the user know that image has been captured. The 474 * raw callback occurs when the raw image data is available (NOTE: the data 475 * may be null if the hardware does not have enough memory to make a copy). 476 * The jpeg callback occurs when the compressed image is available. If the 477 * application does not need a particular callback, a null can be passed 478 * instead of a callback method. 479 * 480 * This method will stop the preview. Applications should not call {@link 481 * #stopPreview()} before this. After jpeg callback is received, 482 * applications can call {@link #startPreview()} to restart the preview. 483 * 484 * @param shutter callback after the image is captured, may be null 485 * @param raw callback with raw image data, may be null 486 * @param jpeg callback with jpeg image data, may be null 487 */ 488 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 489 PictureCallback jpeg) { 490 takePicture(shutter, raw, null, jpeg); 491 } 492 private native final void native_takePicture(); 493 494 /** 495 * Triggers an asynchronous image capture. The camera service will initiate 496 * a series of callbacks to the application as the image capture progresses. 497 * The shutter callback occurs after the image is captured. This can be used 498 * to trigger a sound to let the user know that image has been captured. The 499 * raw callback occurs when the raw image data is available (NOTE: the data 500 * may be null if the hardware does not have enough memory to make a copy). 501 * The postview callback occurs when a scaled, fully processed postview 502 * image is available (NOTE: not all hardware supports this). The jpeg 503 * callback occurs when the compressed image is available. If the 504 * application does not need a particular callback, a null can be passed 505 * instead of a callback method. 506 * 507 * This method will stop the preview. Applications should not call {@link 508 * #stopPreview()} before this. After jpeg callback is received, 509 * applications can call {@link #startPreview()} to restart the preview. 510 * 511 * @param shutter callback after the image is captured, may be null 512 * @param raw callback with raw image data, may be null 513 * @param postview callback with postview image data, may be null 514 * @param jpeg callback with jpeg image data, may be null 515 */ 516 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 517 PictureCallback postview, PictureCallback jpeg) { 518 mShutterCallback = shutter; 519 mRawImageCallback = raw; 520 mPostviewCallback = postview; 521 mJpegCallback = jpeg; 522 native_takePicture(); 523 } 524 525 /** 526 * Zooms to the requested value smoothly. Driver will generate {@link 527 * #ZoomCallback} for the current zoom value and whether zoom is stopped. 528 * The applications can call {@link #stopSmoothZoom} to stop the zoom 529 * earlier. The applications should not call startSmoothZoom again or {@link 530 * android.hardware.Camera.Parameters#setZoom(int)} before the zoom stops. 531 * 532 * @param value zoom value. The valid range is 0 to {@link 533 * android.hardware.Camera.Parameters#getMaxZoom}. 534 * @hide 535 */ 536 public native final void startSmoothZoom(int value); 537 538 /** 539 * Stops the smooth zoom. The applications should wait for the {@link 540 * #ZoomCallback} to know when the zoom is actually stopped. 541 * @hide 542 */ 543 public native final void stopSmoothZoom(); 544 545 /** 546 * Set the display orientation. This affects the preview frames and the 547 * picture displayed after snapshot. This method is useful for portrait 548 * mode applications. 549 * 550 * This does not affect the order of byte array passed in 551 * {@link PreviewCallback#onPreviewFrame}. This method is not allowed to 552 * be called during preview. 553 * 554 * @param degrees the angle that the picture will be rotated clockwise. 555 * Valid values are 0, 90, 180, and 270. The starting 556 * position is 0 (landscape). 557 */ 558 public native final void setDisplayOrientation(int degrees); 559 560 /** 561 * Handles the zoom callback. 562 * 563 * @hide 564 */ 565 public interface ZoomCallback 566 { 567 /** 568 * Callback for zoom updates 569 * 570 * @param zoomValue the current zoom value. In smooth zoom mode, camera 571 * generates this callback for every new zoom value. 572 * @param stopped whether smooth zoom is stopped. If the value is true, 573 * this is the last zoom update for the application. 574 * 575 * @param camera the Camera service object 576 * @see android.hardware.Camera.Parameters#startSmoothZoom 577 */ 578 void onZoomUpdate(int zoomValue, boolean stopped, Camera camera); 579 }; 580 581 /** 582 * Registers a callback to be invoked when the zoom value is updated by the 583 * camera driver during smooth zoom. 584 * @param cb the callback to run 585 * @hide 586 */ 587 public final void setZoomCallback(ZoomCallback cb) 588 { 589 mZoomCallback = cb; 590 } 591 592 // These match the enum in include/ui/Camera.h 593 /** Unspecified camerar error. @see #ErrorCallback */ 594 public static final int CAMERA_ERROR_UNKNOWN = 1; 595 /** Media server died. In this case, the application must release the 596 * Camera object and instantiate a new one. @see #ErrorCallback */ 597 public static final int CAMERA_ERROR_SERVER_DIED = 100; 598 599 /** 600 * Handles the camera error callback. 601 */ 602 public interface ErrorCallback 603 { 604 /** 605 * Callback for camera errors. 606 * @param error error code: 607 * <ul> 608 * <li>{@link #CAMERA_ERROR_UNKNOWN} 609 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 610 * </ul> 611 * @param camera the Camera service object 612 */ 613 void onError(int error, Camera camera); 614 }; 615 616 /** 617 * Registers a callback to be invoked when an error occurs. 618 * @param cb the callback to run 619 */ 620 public final void setErrorCallback(ErrorCallback cb) 621 { 622 mErrorCallback = cb; 623 } 624 625 private native final void native_setParameters(String params); 626 private native final String native_getParameters(); 627 628 /** 629 * Sets the Parameters for pictures from this Camera service. 630 * 631 * @param params the Parameters to use for this Camera service 632 */ 633 public void setParameters(Parameters params) { 634 native_setParameters(params.flatten()); 635 } 636 637 /** 638 * Returns the picture Parameters for this Camera service. 639 */ 640 public Parameters getParameters() { 641 Parameters p = new Parameters(); 642 String s = native_getParameters(); 643 p.unflatten(s); 644 return p; 645 } 646 647 /** 648 * Handles the picture size (dimensions). 649 */ 650 public class Size { 651 /** 652 * Sets the dimensions for pictures. 653 * 654 * @param w the photo width (pixels) 655 * @param h the photo height (pixels) 656 */ 657 public Size(int w, int h) { 658 width = w; 659 height = h; 660 } 661 /** 662 * Compares {@code obj} to this size. 663 * 664 * @param obj the object to compare this size with. 665 * @return {@code true} if the width and height of {@code obj} is the 666 * same as those of this size. {@code false} otherwise. 667 */ 668 @Override 669 public boolean equals(Object obj) { 670 if (!(obj instanceof Size)) { 671 return false; 672 } 673 Size s = (Size) obj; 674 return width == s.width && height == s.height; 675 } 676 @Override 677 public int hashCode() { 678 return width * 32713 + height; 679 } 680 /** width of the picture */ 681 public int width; 682 /** height of the picture */ 683 public int height; 684 }; 685 686 /** 687 * Handles the parameters for pictures created by a Camera service. 688 * 689 * <p>To make camera parameters take effect, applications have to call 690 * Camera.setParameters. For example, after setWhiteBalance is called, white 691 * balance is not changed until Camera.setParameters() is called. 692 * 693 * <p>Different devices may have different camera capabilities, such as 694 * picture size or flash modes. The application should query the camera 695 * capabilities before setting parameters. For example, the application 696 * should call getSupportedColorEffects before calling setEffect. If the 697 * camera does not support color effects, getSupportedColorEffects will 698 * return null. 699 */ 700 public class Parameters { 701 // Parameter keys to communicate with the camera driver. 702 private static final String KEY_PREVIEW_SIZE = "preview-size"; 703 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 704 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 705 private static final String KEY_PICTURE_SIZE = "picture-size"; 706 private static final String KEY_PICTURE_FORMAT = "picture-format"; 707 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 708 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 709 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 710 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 711 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 712 private static final String KEY_ROTATION = "rotation"; 713 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 714 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 715 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 716 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 717 private static final String KEY_WHITE_BALANCE = "whitebalance"; 718 private static final String KEY_EFFECT = "effect"; 719 private static final String KEY_ANTIBANDING = "antibanding"; 720 private static final String KEY_SCENE_MODE = "scene-mode"; 721 private static final String KEY_FLASH_MODE = "flash-mode"; 722 private static final String KEY_FOCUS_MODE = "focus-mode"; 723 private static final String KEY_FOCAL_LENGTH = "focal-length"; 724 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 725 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 726 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 727 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 728 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 729 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 730 // Parameter key suffix for supported values. 731 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 732 733 // Values for white balance settings. 734 public static final String WHITE_BALANCE_AUTO = "auto"; 735 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 736 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 737 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 738 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 739 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 740 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 741 public static final String WHITE_BALANCE_SHADE = "shade"; 742 743 // Values for color effect settings. 744 public static final String EFFECT_NONE = "none"; 745 public static final String EFFECT_MONO = "mono"; 746 public static final String EFFECT_NEGATIVE = "negative"; 747 public static final String EFFECT_SOLARIZE = "solarize"; 748 public static final String EFFECT_SEPIA = "sepia"; 749 public static final String EFFECT_POSTERIZE = "posterize"; 750 public static final String EFFECT_WHITEBOARD = "whiteboard"; 751 public static final String EFFECT_BLACKBOARD = "blackboard"; 752 public static final String EFFECT_AQUA = "aqua"; 753 754 // Values for antibanding settings. 755 public static final String ANTIBANDING_AUTO = "auto"; 756 public static final String ANTIBANDING_50HZ = "50hz"; 757 public static final String ANTIBANDING_60HZ = "60hz"; 758 public static final String ANTIBANDING_OFF = "off"; 759 760 // Values for flash mode settings. 761 /** 762 * Flash will not be fired. 763 */ 764 public static final String FLASH_MODE_OFF = "off"; 765 766 /** 767 * Flash will be fired automatically when required. The flash may be fired 768 * during preview, auto-focus, or snapshot depending on the driver. 769 */ 770 public static final String FLASH_MODE_AUTO = "auto"; 771 772 /** 773 * Flash will always be fired during snapshot. The flash may also be 774 * fired during preview or auto-focus depending on the driver. 775 */ 776 public static final String FLASH_MODE_ON = "on"; 777 778 /** 779 * Flash will be fired in red-eye reduction mode. 780 */ 781 public static final String FLASH_MODE_RED_EYE = "red-eye"; 782 783 /** 784 * Constant emission of light during preview, auto-focus and snapshot. 785 * This can also be used for video recording. 786 */ 787 public static final String FLASH_MODE_TORCH = "torch"; 788 789 // Values for scene mode settings. 790 public static final String SCENE_MODE_AUTO = "auto"; 791 public static final String SCENE_MODE_ACTION = "action"; 792 public static final String SCENE_MODE_PORTRAIT = "portrait"; 793 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 794 public static final String SCENE_MODE_NIGHT = "night"; 795 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 796 public static final String SCENE_MODE_THEATRE = "theatre"; 797 public static final String SCENE_MODE_BEACH = "beach"; 798 public static final String SCENE_MODE_SNOW = "snow"; 799 public static final String SCENE_MODE_SUNSET = "sunset"; 800 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 801 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 802 public static final String SCENE_MODE_SPORTS = "sports"; 803 public static final String SCENE_MODE_PARTY = "party"; 804 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 805 806 // Values for focus mode settings. 807 /** 808 * Auto-focus mode. 809 */ 810 public static final String FOCUS_MODE_AUTO = "auto"; 811 812 /** 813 * Focus is set at infinity. Applications should not call 814 * {@link #autoFocus(AutoFocusCallback)} in this mode. 815 */ 816 public static final String FOCUS_MODE_INFINITY = "infinity"; 817 public static final String FOCUS_MODE_MACRO = "macro"; 818 819 /** 820 * Focus is fixed. The camera is always in this mode if the focus is not 821 * adjustable. If the camera has auto-focus, this mode can fix the 822 * focus, which is usually at hyperfocal distance. Applications should 823 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 824 */ 825 public static final String FOCUS_MODE_FIXED = "fixed"; 826 827 // Formats for setPreviewFormat and setPictureFormat. 828 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 829 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 830 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 831 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 832 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 833 834 private HashMap<String, String> mMap; 835 836 private Parameters() { 837 mMap = new HashMap<String, String>(); 838 } 839 840 /** 841 * Writes the current Parameters to the log. 842 * @hide 843 * @deprecated 844 */ 845 public void dump() { 846 Log.e(TAG, "dump: size=" + mMap.size()); 847 for (String k : mMap.keySet()) { 848 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 849 } 850 } 851 852 /** 853 * Creates a single string with all the parameters set in 854 * this Parameters object. 855 * <p>The {@link #unflatten(String)} method does the reverse.</p> 856 * 857 * @return a String with all values from this Parameters object, in 858 * semi-colon delimited key-value pairs 859 */ 860 public String flatten() { 861 StringBuilder flattened = new StringBuilder(); 862 for (String k : mMap.keySet()) { 863 flattened.append(k); 864 flattened.append("="); 865 flattened.append(mMap.get(k)); 866 flattened.append(";"); 867 } 868 // chop off the extra semicolon at the end 869 flattened.deleteCharAt(flattened.length()-1); 870 return flattened.toString(); 871 } 872 873 /** 874 * Takes a flattened string of parameters and adds each one to 875 * this Parameters object. 876 * <p>The {@link #flatten()} method does the reverse.</p> 877 * 878 * @param flattened a String of parameters (key-value paired) that 879 * are semi-colon delimited 880 */ 881 public void unflatten(String flattened) { 882 mMap.clear(); 883 884 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 885 while (tokenizer.hasMoreElements()) { 886 String kv = tokenizer.nextToken(); 887 int pos = kv.indexOf('='); 888 if (pos == -1) { 889 continue; 890 } 891 String k = kv.substring(0, pos); 892 String v = kv.substring(pos + 1); 893 mMap.put(k, v); 894 } 895 } 896 897 public void remove(String key) { 898 mMap.remove(key); 899 } 900 901 /** 902 * Sets a String parameter. 903 * 904 * @param key the key name for the parameter 905 * @param value the String value of the parameter 906 */ 907 public void set(String key, String value) { 908 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 909 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 910 return; 911 } 912 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 913 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 914 return; 915 } 916 917 mMap.put(key, value); 918 } 919 920 /** 921 * Sets an integer parameter. 922 * 923 * @param key the key name for the parameter 924 * @param value the int value of the parameter 925 */ 926 public void set(String key, int value) { 927 mMap.put(key, Integer.toString(value)); 928 } 929 930 /** 931 * Returns the value of a String parameter. 932 * 933 * @param key the key name for the parameter 934 * @return the String value of the parameter 935 */ 936 public String get(String key) { 937 return mMap.get(key); 938 } 939 940 /** 941 * Returns the value of an integer parameter. 942 * 943 * @param key the key name for the parameter 944 * @return the int value of the parameter 945 */ 946 public int getInt(String key) { 947 return Integer.parseInt(mMap.get(key)); 948 } 949 950 /** 951 * Sets the dimensions for preview pictures. 952 * 953 * @param width the width of the pictures, in pixels 954 * @param height the height of the pictures, in pixels 955 */ 956 public void setPreviewSize(int width, int height) { 957 String v = Integer.toString(width) + "x" + Integer.toString(height); 958 set(KEY_PREVIEW_SIZE, v); 959 } 960 961 /** 962 * Returns the dimensions setting for preview pictures. 963 * 964 * @return a Size object with the height and width setting 965 * for the preview picture 966 */ 967 public Size getPreviewSize() { 968 String pair = get(KEY_PREVIEW_SIZE); 969 return strToSize(pair); 970 } 971 972 /** 973 * Gets the supported preview sizes. 974 * 975 * @return a List of Size object. This method will always return a list 976 * with at least one element. 977 */ 978 public List<Size> getSupportedPreviewSizes() { 979 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 980 return splitSize(str); 981 } 982 983 /** 984 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 985 * applications set both width and height to 0, EXIF will not contain 986 * thumbnail. 987 * 988 * @param width the width of the thumbnail, in pixels 989 * @param height the height of the thumbnail, in pixels 990 */ 991 public void setJpegThumbnailSize(int width, int height) { 992 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 993 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 994 } 995 996 /** 997 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 998 * 999 * @return a Size object with the height and width setting for the EXIF 1000 * thumbnails 1001 */ 1002 public Size getJpegThumbnailSize() { 1003 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1004 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1005 } 1006 1007 /** 1008 * Gets the supported jpeg thumbnail sizes. 1009 * 1010 * @return a List of Size object. This method will always return a list 1011 * with at least two elements. Size 0,0 (no thumbnail) is always 1012 * supported. 1013 */ 1014 public List<Size> getSupportedJpegThumbnailSizes() { 1015 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1016 return splitSize(str); 1017 } 1018 1019 /** 1020 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1021 * 1022 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1023 * to 100, with 100 being the best. 1024 */ 1025 public void setJpegThumbnailQuality(int quality) { 1026 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1027 } 1028 1029 /** 1030 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1031 * 1032 * @return the JPEG quality setting of the EXIF thumbnail. 1033 */ 1034 public int getJpegThumbnailQuality() { 1035 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1036 } 1037 1038 /** 1039 * Sets Jpeg quality of captured picture. 1040 * 1041 * @param quality the JPEG quality of captured picture. The range is 1 1042 * to 100, with 100 being the best. 1043 */ 1044 public void setJpegQuality(int quality) { 1045 set(KEY_JPEG_QUALITY, quality); 1046 } 1047 1048 /** 1049 * Returns the quality setting for the JPEG picture. 1050 * 1051 * @return the JPEG picture quality setting. 1052 */ 1053 public int getJpegQuality() { 1054 return getInt(KEY_JPEG_QUALITY); 1055 } 1056 1057 /** 1058 * Sets the rate at which preview frames are received. This is the 1059 * target frame rate. The actual frame rate depends on the driver. 1060 * 1061 * @param fps the frame rate (frames per second) 1062 */ 1063 public void setPreviewFrameRate(int fps) { 1064 set(KEY_PREVIEW_FRAME_RATE, fps); 1065 } 1066 1067 /** 1068 * Returns the setting for the rate at which preview frames are 1069 * received. This is the target frame rate. The actual frame rate 1070 * depends on the driver. 1071 * 1072 * @return the frame rate setting (frames per second) 1073 */ 1074 public int getPreviewFrameRate() { 1075 return getInt(KEY_PREVIEW_FRAME_RATE); 1076 } 1077 1078 /** 1079 * Gets the supported preview frame rates. 1080 * 1081 * @return a List of Integer objects (preview frame rates). null if 1082 * preview frame rate setting is not supported. 1083 */ 1084 public List<Integer> getSupportedPreviewFrameRates() { 1085 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1086 return splitInt(str); 1087 } 1088 1089 /** 1090 * Sets the image format for preview pictures. 1091 * <p>If this is never called, the default format will be 1092 * {@link android.graphics.ImageFormat#NV21}, which 1093 * uses the NV21 encoding format.</p> 1094 * 1095 * @param pixel_format the desired preview picture format, defined 1096 * by one of the {@link android.graphics.ImageFormat} constants. 1097 * (E.g., <var>ImageFormat.NV21</var> (default), 1098 * <var>ImageFormat.RGB_565</var>, or 1099 * <var>ImageFormat.JPEG</var>) 1100 * @see android.graphics.ImageFormat 1101 */ 1102 public void setPreviewFormat(int pixel_format) { 1103 String s = cameraFormatForPixelFormat(pixel_format); 1104 if (s == null) { 1105 throw new IllegalArgumentException( 1106 "Invalid pixel_format=" + pixel_format); 1107 } 1108 1109 set(KEY_PREVIEW_FORMAT, s); 1110 } 1111 1112 /** 1113 * Returns the image format for preview pictures got from 1114 * {@link PreviewCallback}. 1115 * 1116 * @return the {@link android.graphics.ImageFormat} int representing 1117 * the preview picture format. 1118 */ 1119 public int getPreviewFormat() { 1120 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1121 } 1122 1123 /** 1124 * Gets the supported preview formats. 1125 * 1126 * @return a List of Integer objects. This method will always return a 1127 * list with at least one element. 1128 */ 1129 public List<Integer> getSupportedPreviewFormats() { 1130 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1131 ArrayList<Integer> formats = new ArrayList<Integer>(); 1132 for (String s : split(str)) { 1133 int f = pixelFormatForCameraFormat(s); 1134 if (f == ImageFormat.UNKNOWN) continue; 1135 formats.add(f); 1136 } 1137 return formats; 1138 } 1139 1140 /** 1141 * Sets the dimensions for pictures. 1142 * 1143 * @param width the width for pictures, in pixels 1144 * @param height the height for pictures, in pixels 1145 */ 1146 public void setPictureSize(int width, int height) { 1147 String v = Integer.toString(width) + "x" + Integer.toString(height); 1148 set(KEY_PICTURE_SIZE, v); 1149 } 1150 1151 /** 1152 * Returns the dimension setting for pictures. 1153 * 1154 * @return a Size object with the height and width setting 1155 * for pictures 1156 */ 1157 public Size getPictureSize() { 1158 String pair = get(KEY_PICTURE_SIZE); 1159 return strToSize(pair); 1160 } 1161 1162 /** 1163 * Gets the supported picture sizes. 1164 * 1165 * @return a List of Size objects. This method will always return a list 1166 * with at least one element. 1167 */ 1168 public List<Size> getSupportedPictureSizes() { 1169 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1170 return splitSize(str); 1171 } 1172 1173 /** 1174 * Sets the image format for pictures. 1175 * 1176 * @param pixel_format the desired picture format 1177 * (<var>ImageFormat.NV21</var>, 1178 * <var>ImageFormat.RGB_565</var>, or 1179 * <var>ImageFormat.JPEG</var>) 1180 * @see android.graphics.ImageFormat 1181 */ 1182 public void setPictureFormat(int pixel_format) { 1183 String s = cameraFormatForPixelFormat(pixel_format); 1184 if (s == null) { 1185 throw new IllegalArgumentException( 1186 "Invalid pixel_format=" + pixel_format); 1187 } 1188 1189 set(KEY_PICTURE_FORMAT, s); 1190 } 1191 1192 /** 1193 * Returns the image format for pictures. 1194 * 1195 * @return the ImageFormat int representing the picture format 1196 */ 1197 public int getPictureFormat() { 1198 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1199 } 1200 1201 /** 1202 * Gets the supported picture formats. 1203 * 1204 * @return a List of Integer objects (values are ImageFormat.XXX). This 1205 * method will always return a list with at least one element. 1206 */ 1207 public List<Integer> getSupportedPictureFormats() { 1208 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1209 ArrayList<Integer> formats = new ArrayList<Integer>(); 1210 for (String s : split(str)) { 1211 int f = pixelFormatForCameraFormat(s); 1212 if (f == ImageFormat.UNKNOWN) continue; 1213 formats.add(f); 1214 } 1215 return formats; 1216 } 1217 1218 private String cameraFormatForPixelFormat(int pixel_format) { 1219 switch(pixel_format) { 1220 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1221 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1222 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1223 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1224 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1225 default: return null; 1226 } 1227 } 1228 1229 private int pixelFormatForCameraFormat(String format) { 1230 if (format == null) 1231 return ImageFormat.UNKNOWN; 1232 1233 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1234 return ImageFormat.NV16; 1235 1236 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1237 return ImageFormat.NV21; 1238 1239 if (format.equals(PIXEL_FORMAT_YUV422I)) 1240 return ImageFormat.YUY2; 1241 1242 if (format.equals(PIXEL_FORMAT_RGB565)) 1243 return ImageFormat.RGB_565; 1244 1245 if (format.equals(PIXEL_FORMAT_JPEG)) 1246 return ImageFormat.JPEG; 1247 1248 return ImageFormat.UNKNOWN; 1249 } 1250 1251 /** 1252 * Sets the orientation of the device in degrees. For example, suppose 1253 * the natural position of the device is landscape. If the user takes a 1254 * picture in landscape mode in 2048x1536 resolution, the rotation 1255 * should be set to 0. If the user rotates the phone 90 degrees 1256 * clockwise, the rotation should be set to 90. Applications can use 1257 * {@link android.view.OrientationEventListener} to set this parameter. 1258 * 1259 * The camera driver may set orientation in the EXIF header without 1260 * rotating the picture. Or the driver may rotate the picture and 1261 * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation 1262 * in the EXIF header will be missing or 1 (row #0 is top and column #0 1263 * is left side). 1264 * 1265 * @param rotation The orientation of the device in degrees. Rotation 1266 * can only be 0, 90, 180 or 270. 1267 * @throws IllegalArgumentException if rotation value is invalid. 1268 * @see android.view.OrientationEventListener 1269 */ 1270 public void setRotation(int rotation) { 1271 if (rotation == 0 || rotation == 90 || rotation == 180 1272 || rotation == 270) { 1273 set(KEY_ROTATION, Integer.toString(rotation)); 1274 } else { 1275 throw new IllegalArgumentException( 1276 "Invalid rotation=" + rotation); 1277 } 1278 } 1279 1280 /** 1281 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1282 * header. 1283 * 1284 * @param latitude GPS latitude coordinate. 1285 */ 1286 public void setGpsLatitude(double latitude) { 1287 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1288 } 1289 1290 /** 1291 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1292 * header. 1293 * 1294 * @param longitude GPS longitude coordinate. 1295 */ 1296 public void setGpsLongitude(double longitude) { 1297 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1298 } 1299 1300 /** 1301 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1302 * 1303 * @param altitude GPS altitude in meters. 1304 */ 1305 public void setGpsAltitude(double altitude) { 1306 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1307 } 1308 1309 /** 1310 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1311 * 1312 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1313 * 1970). 1314 */ 1315 public void setGpsTimestamp(long timestamp) { 1316 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1317 } 1318 1319 /** 1320 * Removes GPS latitude, longitude, altitude, and timestamp from the 1321 * parameters. 1322 */ 1323 public void removeGpsData() { 1324 remove(KEY_GPS_LATITUDE); 1325 remove(KEY_GPS_LONGITUDE); 1326 remove(KEY_GPS_ALTITUDE); 1327 remove(KEY_GPS_TIMESTAMP); 1328 } 1329 1330 /** 1331 * Gets the current white balance setting. 1332 * 1333 * @return one of WHITE_BALANCE_XXX string constant. null if white 1334 * balance setting is not supported. 1335 */ 1336 public String getWhiteBalance() { 1337 return get(KEY_WHITE_BALANCE); 1338 } 1339 1340 /** 1341 * Sets the white balance. 1342 * 1343 * @param value WHITE_BALANCE_XXX string constant. 1344 */ 1345 public void setWhiteBalance(String value) { 1346 set(KEY_WHITE_BALANCE, value); 1347 } 1348 1349 /** 1350 * Gets the supported white balance. 1351 * 1352 * @return a List of WHITE_BALANCE_XXX string constants. null if white 1353 * balance setting is not supported. 1354 */ 1355 public List<String> getSupportedWhiteBalance() { 1356 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 1357 return split(str); 1358 } 1359 1360 /** 1361 * Gets the current color effect setting. 1362 * 1363 * @return one of EFFECT_XXX string constant. null if color effect 1364 * setting is not supported. 1365 */ 1366 public String getColorEffect() { 1367 return get(KEY_EFFECT); 1368 } 1369 1370 /** 1371 * Sets the current color effect setting. 1372 * 1373 * @param value EFFECT_XXX string constants. 1374 */ 1375 public void setColorEffect(String value) { 1376 set(KEY_EFFECT, value); 1377 } 1378 1379 /** 1380 * Gets the supported color effects. 1381 * 1382 * @return a List of EFFECT_XXX string constants. null if color effect 1383 * setting is not supported. 1384 */ 1385 public List<String> getSupportedColorEffects() { 1386 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 1387 return split(str); 1388 } 1389 1390 1391 /** 1392 * Gets the current antibanding setting. 1393 * 1394 * @return one of ANTIBANDING_XXX string constant. null if antibanding 1395 * setting is not supported. 1396 */ 1397 public String getAntibanding() { 1398 return get(KEY_ANTIBANDING); 1399 } 1400 1401 /** 1402 * Sets the antibanding. 1403 * 1404 * @param antibanding ANTIBANDING_XXX string constant. 1405 */ 1406 public void setAntibanding(String antibanding) { 1407 set(KEY_ANTIBANDING, antibanding); 1408 } 1409 1410 /** 1411 * Gets the supported antibanding values. 1412 * 1413 * @return a List of ANTIBANDING_XXX string constants. null if 1414 * antibanding setting is not supported. 1415 */ 1416 public List<String> getSupportedAntibanding() { 1417 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 1418 return split(str); 1419 } 1420 1421 /** 1422 * Gets the current scene mode setting. 1423 * 1424 * @return one of SCENE_MODE_XXX string constant. null if scene mode 1425 * setting is not supported. 1426 */ 1427 public String getSceneMode() { 1428 return get(KEY_SCENE_MODE); 1429 } 1430 1431 /** 1432 * Sets the scene mode. Other parameters may be changed after changing 1433 * scene mode. For example, flash and supported flash mode may be 1434 * changed to "off" in night scene mode. After setting scene mode, 1435 * applications should call getParameters to know if some parameters are 1436 * changed. 1437 * 1438 * @param value SCENE_MODE_XXX string constants. 1439 */ 1440 public void setSceneMode(String value) { 1441 set(KEY_SCENE_MODE, value); 1442 } 1443 1444 /** 1445 * Gets the supported scene modes. 1446 * 1447 * @return a List of SCENE_MODE_XXX string constant. null if scene mode 1448 * setting is not supported. 1449 */ 1450 public List<String> getSupportedSceneModes() { 1451 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 1452 return split(str); 1453 } 1454 1455 /** 1456 * Gets the current flash mode setting. 1457 * 1458 * @return one of FLASH_MODE_XXX string constant. null if flash mode 1459 * setting is not supported. 1460 */ 1461 public String getFlashMode() { 1462 return get(KEY_FLASH_MODE); 1463 } 1464 1465 /** 1466 * Sets the flash mode. 1467 * 1468 * @param value FLASH_MODE_XXX string constants. 1469 */ 1470 public void setFlashMode(String value) { 1471 set(KEY_FLASH_MODE, value); 1472 } 1473 1474 /** 1475 * Gets the supported flash modes. 1476 * 1477 * @return a List of FLASH_MODE_XXX string constants. null if flash mode 1478 * setting is not supported. 1479 */ 1480 public List<String> getSupportedFlashModes() { 1481 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 1482 return split(str); 1483 } 1484 1485 /** 1486 * Gets the current focus mode setting. 1487 * 1488 * @return one of FOCUS_MODE_XXX string constant. If the camera does not 1489 * support auto-focus, this should return {@link 1490 * #FOCUS_MODE_FIXED}. If the focus mode is not FOCUS_MODE_FIXED 1491 * or {@link #FOCUS_MODE_INFINITY}, applications should call 1492 * {@link #autoFocus(AutoFocusCallback)} to start the focus. 1493 */ 1494 public String getFocusMode() { 1495 return get(KEY_FOCUS_MODE); 1496 } 1497 1498 /** 1499 * Sets the focus mode. 1500 * 1501 * @param value FOCUS_MODE_XXX string constants. 1502 */ 1503 public void setFocusMode(String value) { 1504 set(KEY_FOCUS_MODE, value); 1505 } 1506 1507 /** 1508 * Gets the supported focus modes. 1509 * 1510 * @return a List of FOCUS_MODE_XXX string constants. This method will 1511 * always return a list with at least one element. 1512 */ 1513 public List<String> getSupportedFocusModes() { 1514 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 1515 return split(str); 1516 } 1517 1518 /** 1519 * Gets the focal length (in millimeter) of the camera. 1520 * 1521 * @return the focal length. This method will always return a valid 1522 * value. 1523 */ 1524 public float getFocalLength() { 1525 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 1526 } 1527 1528 /** 1529 * Gets the horizontal angle of view in degrees. 1530 * 1531 * @return horizontal angle of view. This method will always return a 1532 * valid value. 1533 */ 1534 public float getHorizontalViewAngle() { 1535 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 1536 } 1537 1538 /** 1539 * Gets the vertical angle of view in degrees. 1540 * 1541 * @return vertical angle of view. This method will always return a 1542 * valid value. 1543 */ 1544 public float getVerticalViewAngle() { 1545 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 1546 } 1547 1548 /** 1549 * Gets the current exposure compensation index. 1550 * 1551 * @return current exposure compensation index. The range is {@link 1552 * #getMinExposureCompensation} to {@link 1553 * #getMaxExposureCompensation}. 0 means exposure is not 1554 * adjusted. 1555 */ 1556 public int getExposureCompensation() { 1557 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 1558 } 1559 1560 /** 1561 * Sets the exposure compensation index. 1562 * 1563 * @param value. The valid value range is from {@link 1564 * #getMinExposureCompensation} (inclusive) to {@link 1565 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 1566 * not adjusted. Application should call 1567 * getMinExposureCompensation and getMaxExposureCompensation to 1568 * know if exposure compensation is supported. 1569 */ 1570 public void setExposureCompensation(int value) { 1571 set(KEY_EXPOSURE_COMPENSATION, value); 1572 } 1573 1574 /** 1575 * Gets the maximum exposure compensation index. 1576 * 1577 * @return maximum exposure compensation index (>=0). If both this 1578 * method and {@link #getMinExposureCompensation} return 0, 1579 * exposure compensation is not supported. 1580 */ 1581 public int getMaxExposureCompensation() { 1582 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 1583 } 1584 1585 /** 1586 * Gets the minimum exposure compensation index. 1587 * 1588 * @return minimum exposure compensation index (<=0). If both this 1589 * method and {@link #getMaxExposureCompensation} return 0, 1590 * exposure compensation is not supported. 1591 */ 1592 public int getMinExposureCompensation() { 1593 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 1594 } 1595 1596 /** 1597 * Gets the exposure compensation step. 1598 * 1599 * @return exposure compensation step. Applications can get EV by 1600 * multiplying the exposure compensation index and step. Ex: if 1601 * exposure compensation index is -6 and step is 0.333333333, EV 1602 * is -2. 1603 */ 1604 public float getExposureCompensationStep() { 1605 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 1606 } 1607 1608 /** 1609 * Gets current zoom value. This also works when smooth zoom is in 1610 * progress. 1611 * 1612 * @return the current zoom value. The range is 0 to {@link 1613 * #getMaxZoom}. 1614 * @hide 1615 */ 1616 public int getZoom() { 1617 return getInt("zoom"); 1618 } 1619 1620 /** 1621 * Sets current zoom value. If {@link #startSmoothZoom(int)} has been 1622 * called and zoom is not stopped yet, applications should not call this 1623 * method. 1624 * 1625 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 1626 * @hide 1627 */ 1628 public void setZoom(int value) { 1629 set("zoom", value); 1630 } 1631 1632 /** 1633 * Returns true if zoom is supported. Applications should call this 1634 * before using other zoom methods. 1635 * 1636 * @return true if zoom is supported. 1637 * @hide 1638 */ 1639 public boolean isZoomSupported() { 1640 String str = get("zoom-supported"); 1641 return "true".equals(str); 1642 } 1643 1644 /** 1645 * Gets the maximum zoom value allowed for snapshot. This is the maximum 1646 * value that applications can set to {@link #setZoom(int)}. 1647 * 1648 * @return the maximum zoom value supported by the camera. 1649 * @hide 1650 */ 1651 public int getMaxZoom() { 1652 return getInt("max-zoom"); 1653 } 1654 1655 /** 1656 * Gets the zoom factors of all zoom values. 1657 * 1658 * @return the zoom factors in 1/100 increments. Ex: a zoom of 3.2x is 1659 * returned as 320. Accuracy of the value is dependent on the 1660 * hardware implementation. The first element of the list is the 1661 * zoom factor of first zoom value. If the first zoom value is 1662 * 0, the zoom factor should be 100. The last element is the 1663 * zoom factor of zoom value {@link #getMaxZoom}. 1664 * @hide 1665 */ 1666 public List<Integer> getZoomFactors() { 1667 return splitInt(get("zoom-factors")); 1668 } 1669 1670 /** 1671 * Returns true if smooth zoom is supported. Applications should call 1672 * this before using other smooth zoom methods. 1673 * 1674 * @return true if smooth zoom is supported. 1675 * @hide 1676 */ 1677 public boolean isSmoothZoomSupported() { 1678 String str = get("smooth-zoom-supported"); 1679 return "true".equals(str); 1680 } 1681 1682 // Splits a comma delimited string to an ArrayList of String. 1683 // Return null if the passing string is null or the size is 0. 1684 private ArrayList<String> split(String str) { 1685 if (str == null) return null; 1686 1687 // Use StringTokenizer because it is faster than split. 1688 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1689 ArrayList<String> substrings = new ArrayList<String>(); 1690 while (tokenizer.hasMoreElements()) { 1691 substrings.add(tokenizer.nextToken()); 1692 } 1693 return substrings; 1694 } 1695 1696 // Splits a comma delimited string to an ArrayList of Integer. 1697 // Return null if the passing string is null or the size is 0. 1698 private ArrayList<Integer> splitInt(String str) { 1699 if (str == null) return null; 1700 1701 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1702 ArrayList<Integer> substrings = new ArrayList<Integer>(); 1703 while (tokenizer.hasMoreElements()) { 1704 String token = tokenizer.nextToken(); 1705 substrings.add(Integer.parseInt(token)); 1706 } 1707 if (substrings.size() == 0) return null; 1708 return substrings; 1709 } 1710 1711 // Returns the value of a float parameter. 1712 private float getFloat(String key, float defaultValue) { 1713 try { 1714 return Float.parseFloat(mMap.get(key)); 1715 } catch (NumberFormatException ex) { 1716 return defaultValue; 1717 } 1718 } 1719 1720 // Returns the value of a integer parameter. 1721 private int getInt(String key, int defaultValue) { 1722 try { 1723 return Integer.parseInt(mMap.get(key)); 1724 } catch (NumberFormatException ex) { 1725 return defaultValue; 1726 } 1727 } 1728 1729 // Splits a comma delimited string to an ArrayList of Size. 1730 // Return null if the passing string is null or the size is 0. 1731 private ArrayList<Size> splitSize(String str) { 1732 if (str == null) return null; 1733 1734 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1735 ArrayList<Size> sizeList = new ArrayList<Size>(); 1736 while (tokenizer.hasMoreElements()) { 1737 Size size = strToSize(tokenizer.nextToken()); 1738 if (size != null) sizeList.add(size); 1739 } 1740 if (sizeList.size() == 0) return null; 1741 return sizeList; 1742 } 1743 1744 // Parses a string (ex: "480x320") to Size object. 1745 // Return null if the passing string is null. 1746 private Size strToSize(String str) { 1747 if (str == null) return null; 1748 1749 int pos = str.indexOf('x'); 1750 if (pos != -1) { 1751 String width = str.substring(0, pos); 1752 String height = str.substring(pos + 1); 1753 return new Size(Integer.parseInt(width), 1754 Integer.parseInt(height)); 1755 } 1756 Log.e(TAG, "Invalid size parameter string=" + str); 1757 return null; 1758 } 1759 }; 1760} 1761