Camera.java revision f9293e7d5057f54ec90423f55b78138d5729e30f
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.hardware; 18 19import java.lang.ref.WeakReference; 20import java.util.ArrayList; 21import java.util.HashMap; 22import java.util.List; 23import java.util.StringTokenizer; 24import java.io.IOException; 25 26import android.util.Log; 27import android.view.Surface; 28import android.view.SurfaceHolder; 29import android.graphics.ImageFormat; 30import android.graphics.SurfaceTexture; 31import android.os.Handler; 32import android.os.Looper; 33import android.os.Message; 34 35/** 36 * The Camera class is used to set image capture settings, start/stop preview, 37 * snap pictures, and retrieve frames for encoding for video. This class is a 38 * client for the Camera service, which manages the actual camera hardware. 39 * 40 * <p>To access the device camera, you must declare the 41 * {@link android.Manifest.permission#CAMERA} permission in your Android 42 * Manifest. Also be sure to include the 43 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 44 * manifest element to declare camera features used by your application. 45 * For example, if you use the camera and auto-focus feature, your Manifest 46 * should include the following:</p> 47 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 48 * <uses-feature android:name="android.hardware.camera" /> 49 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 50 * 51 * <p>To take pictures with this class, use the following steps:</p> 52 * 53 * <ol> 54 * <li>Obtain an instance of Camera from {@link #open(int)}. 55 * 56 * <li>Get existing (default) settings with {@link #getParameters()}. 57 * 58 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 59 * {@link #setParameters(Camera.Parameters)}. 60 * 61 * <li>If desired, call {@link #setDisplayOrientation(int)}. 62 * 63 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 64 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 65 * will be unable to start the preview. 66 * 67 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 68 * preview surface. Preview must be started before you can take a picture. 69 * 70 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 71 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 72 * capture a photo. Wait for the callbacks to provide the actual image data. 73 * 74 * <li>After taking a picture, preview display will have stopped. To take more 75 * photos, call {@link #startPreview()} again first. 76 * 77 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 78 * 79 * <li><b>Important:</b> Call {@link #release()} to release the camera for 80 * use by other applications. Applications should release the camera 81 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 82 * it in {@link android.app.Activity#onResume()}). 83 * </ol> 84 * 85 * <p>To quickly switch to video recording mode, use these steps:</p> 86 * 87 * <ol> 88 * <li>Obtain and initialize a Camera and start preview as described above. 89 * 90 * <li>Call {@link #unlock()} to allow the media process to access the camera. 91 * 92 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 93 * See {@link android.media.MediaRecorder} information about video recording. 94 * 95 * <li>When finished recording, call {@link #reconnect()} to re-acquire 96 * and re-lock the camera. 97 * 98 * <li>If desired, restart preview and take more photos or videos. 99 * 100 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 101 * </ol> 102 * 103 * <p>This class is not thread-safe, and is meant for use from one event thread. 104 * Most long-running operations (preview, focus, photo capture, etc) happen 105 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 106 * on the event thread {@link #open(int)} was called from. This class's methods 107 * must never be called from multiple threads at once.</p> 108 * 109 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 110 * may have different hardware specifications, such as megapixel ratings and 111 * auto-focus capabilities. In order for your application to be compatible with 112 * more devices, you should not make assumptions about the device camera 113 * specifications.</p> 114 */ 115public class Camera { 116 private static final String TAG = "Camera"; 117 118 // These match the enums in frameworks/base/include/camera/Camera.h 119 private static final int CAMERA_MSG_ERROR = 0x001; 120 private static final int CAMERA_MSG_SHUTTER = 0x002; 121 private static final int CAMERA_MSG_FOCUS = 0x004; 122 private static final int CAMERA_MSG_ZOOM = 0x008; 123 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 124 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 125 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 126 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 127 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 128 private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; 129 130 private int mNativeContext; // accessed by native methods 131 private EventHandler mEventHandler; 132 private ShutterCallback mShutterCallback; 133 private PictureCallback mRawImageCallback; 134 private PictureCallback mJpegCallback; 135 private PreviewCallback mPreviewCallback; 136 private PictureCallback mPostviewCallback; 137 private AutoFocusCallback mAutoFocusCallback; 138 private OnZoomChangeListener mZoomListener; 139 private ErrorCallback mErrorCallback; 140 private boolean mOneShot; 141 private boolean mWithBuffer; 142 143 /** 144 * Returns the number of physical cameras available on this device. 145 */ 146 public native static int getNumberOfCameras(); 147 148 /** 149 * Returns the information about a particular camera. 150 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 151 */ 152 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 153 154 /** 155 * Information about a camera 156 */ 157 public static class CameraInfo { 158 /** 159 * The facing of the camera is opposite to that of the screen. 160 */ 161 public static final int CAMERA_FACING_BACK = 0; 162 163 /** 164 * The facing of the camera is the same as that of the screen. 165 */ 166 public static final int CAMERA_FACING_FRONT = 1; 167 168 /** 169 * The direction that the camera faces to. It should be 170 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 171 */ 172 public int facing; 173 174 /** 175 * The orientation of the camera image. The value is the angle that the 176 * camera image needs to be rotated clockwise so it shows correctly on 177 * the display in its natural orientation. It should be 0, 90, 180, or 270. 178 * 179 * For example, suppose a device has a naturally tall screen. The 180 * back-facing camera sensor is mounted in landscape. You are looking at 181 * the screen. If the top side of the camera sensor is aligned with the 182 * right edge of the screen in natural orientation, the value should be 183 * 90. If the top side of a front-facing camera sensor is aligned with 184 * the right of the screen, the value should be 270. 185 * 186 * @see #setDisplayOrientation(int) 187 * @see Parameters#setRotation(int) 188 * @see Parameters#setPreviewSize(int, int) 189 * @see Parameters#setPictureSize(int, int) 190 * @see Parameters#setJpegThumbnailSize(int, int) 191 */ 192 public int orientation; 193 }; 194 195 /** 196 * Creates a new Camera object to access a particular hardware camera. 197 * 198 * <p>You must call {@link #release()} when you are done using the camera, 199 * otherwise it will remain locked and be unavailable to other applications. 200 * 201 * <p>Your application should only have one Camera object active at a time 202 * for a particular hardware camera. 203 * 204 * <p>Callbacks from other methods are delivered to the event loop of the 205 * thread which called open(). If this thread has no event loop, then 206 * callbacks are delivered to the main application event loop. If there 207 * is no main application event loop, callbacks are not delivered. 208 * 209 * <p class="caution"><b>Caution:</b> On some devices, this method may 210 * take a long time to complete. It is best to call this method from a 211 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 212 * blocking the main application UI thread. 213 * 214 * @param cameraId the hardware camera to access, between 0 and 215 * {@link #getNumberOfCameras()}-1. 216 * @return a new Camera object, connected, locked and ready for use. 217 * @throws RuntimeException if connection to the camera service fails (for 218 * example, if the camera is in use by another process). 219 */ 220 public static Camera open(int cameraId) { 221 return new Camera(cameraId); 222 } 223 224 /** 225 * Creates a new Camera object to access the first back-facing camera on the 226 * device. If the device does not have a back-facing camera, this returns 227 * null. 228 * @see #open(int) 229 */ 230 public static Camera open() { 231 int numberOfCameras = getNumberOfCameras(); 232 CameraInfo cameraInfo = new CameraInfo(); 233 for (int i = 0; i < numberOfCameras; i++) { 234 getCameraInfo(i, cameraInfo); 235 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 236 return new Camera(i); 237 } 238 } 239 return null; 240 } 241 242 Camera(int cameraId) { 243 mShutterCallback = null; 244 mRawImageCallback = null; 245 mJpegCallback = null; 246 mPreviewCallback = null; 247 mPostviewCallback = null; 248 mZoomListener = null; 249 250 Looper looper; 251 if ((looper = Looper.myLooper()) != null) { 252 mEventHandler = new EventHandler(this, looper); 253 } else if ((looper = Looper.getMainLooper()) != null) { 254 mEventHandler = new EventHandler(this, looper); 255 } else { 256 mEventHandler = null; 257 } 258 259 native_setup(new WeakReference<Camera>(this), cameraId); 260 } 261 262 protected void finalize() { 263 native_release(); 264 } 265 266 private native final void native_setup(Object camera_this, int cameraId); 267 private native final void native_release(); 268 269 270 /** 271 * Disconnects and releases the Camera object resources. 272 * 273 * <p>You must call this as soon as you're done with the Camera object.</p> 274 */ 275 public final void release() { 276 native_release(); 277 } 278 279 /** 280 * Unlocks the camera to allow another process to access it. 281 * Normally, the camera is locked to the process with an active Camera 282 * object until {@link #release()} is called. To allow rapid handoff 283 * between processes, you can call this method to release the camera 284 * temporarily for another process to use; once the other process is done 285 * you can call {@link #reconnect()} to reclaim the camera. 286 * 287 * <p>This must be done before calling 288 * {@link android.media.MediaRecorder#setCamera(Camera)}. 289 * 290 * <p>If you are not recording video, you probably do not need this method. 291 * 292 * @throws RuntimeException if the camera cannot be unlocked. 293 */ 294 public native final void unlock(); 295 296 /** 297 * Re-locks the camera to prevent other processes from accessing it. 298 * Camera objects are locked by default unless {@link #unlock()} is 299 * called. Normally {@link #reconnect()} is used instead. 300 * 301 * <p>If you are not recording video, you probably do not need this method. 302 * 303 * @throws RuntimeException if the camera cannot be re-locked (for 304 * example, if the camera is still in use by another process). 305 */ 306 public native final void lock(); 307 308 /** 309 * Reconnects to the camera service after another process used it. 310 * After {@link #unlock()} is called, another process may use the 311 * camera; when the process is done, you must reconnect to the camera, 312 * which will re-acquire the lock and allow you to continue using the 313 * camera. 314 * 315 * <p>This must be done after {@link android.media.MediaRecorder} is 316 * done recording if {@link android.media.MediaRecorder#setCamera(Camera)} 317 * was used. 318 * 319 * <p>If you are not recording video, you probably do not need this method. 320 * 321 * @throws IOException if a connection cannot be re-established (for 322 * example, if the camera is still in use by another process). 323 */ 324 public native final void reconnect() throws IOException; 325 326 /** 327 * Sets the {@link Surface} to be used for live preview. 328 * Either a surface or surface texture is necessary for preview, and 329 * preview is necessary to take pictures. The same surface can be re-set 330 * without harm. Setting a preview surface will un-set any preview surface 331 * texture that was set via {@link #setPreviewTexture}. 332 * 333 * <p>The {@link SurfaceHolder} must already contain a surface when this 334 * method is called. If you are using {@link android.view.SurfaceView}, 335 * you will need to register a {@link SurfaceHolder.Callback} with 336 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 337 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 338 * calling setPreviewDisplay() or starting preview. 339 * 340 * <p>This method must be called before {@link #startPreview()}. The 341 * one exception is that if the preview surface is not set (or set to null) 342 * before startPreview() is called, then this method may be called once 343 * with a non-null parameter to set the preview surface. (This allows 344 * camera setup and surface creation to happen in parallel, saving time.) 345 * The preview surface may not otherwise change while preview is running. 346 * 347 * @param holder containing the Surface on which to place the preview, 348 * or null to remove the preview surface 349 * @throws IOException if the method fails (for example, if the surface 350 * is unavailable or unsuitable). 351 */ 352 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 353 if (holder != null) { 354 setPreviewDisplay(holder.getSurface()); 355 } else { 356 setPreviewDisplay((Surface)null); 357 } 358 } 359 360 private native final void setPreviewDisplay(Surface surface) throws IOException; 361 362 /** 363 * Sets the {@link SurfaceTexture} to be used for live preview. 364 * Either a surface or surface texture is necessary for preview, and 365 * preview is necessary to take pictures. The same surface texture can be 366 * re-set without harm. Setting a preview surface texture will un-set any 367 * preview surface that was set via {@link #setPreviewDisplay}. 368 * 369 * <p>This method must be called before {@link #startPreview()}. The 370 * one exception is that if the preview surface texture is not set (or set 371 * to null) before startPreview() is called, then this method may be called 372 * once with a non-null parameter to set the preview surface. (This allows 373 * camera setup and surface creation to happen in parallel, saving time.) 374 * The preview surface texture may not otherwise change while preview is 375 * running. 376 * 377 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 378 * images are to be sent or null to remove the current preview surface 379 * texture 380 * @throws IOException if the method fails (for example, if the surface 381 * texture is unavailable or unsuitable). 382 */ 383 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 384 385 /** 386 * Callback interface used to deliver copies of preview frames as 387 * they are displayed. 388 * 389 * @see #setPreviewCallback(Camera.PreviewCallback) 390 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 391 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 392 * @see #startPreview() 393 */ 394 public interface PreviewCallback 395 { 396 /** 397 * Called as preview frames are displayed. This callback is invoked 398 * on the event thread {@link #open(int)} was called from. 399 * 400 * @param data the contents of the preview frame in the format defined 401 * by {@link android.graphics.ImageFormat}, which can be queried 402 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 403 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 404 * is never called, the default will be the YCbCr_420_SP 405 * (NV21) format. 406 * @param camera the Camera service object. 407 */ 408 void onPreviewFrame(byte[] data, Camera camera); 409 }; 410 411 /** 412 * Starts capturing and drawing preview frames to the screen. 413 * Preview will not actually start until a surface is supplied with 414 * {@link #setPreviewDisplay(SurfaceHolder)}. 415 * 416 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 417 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 418 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 419 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 420 * will be called when preview data becomes available. 421 */ 422 public native final void startPreview(); 423 424 /** 425 * Stops capturing and drawing preview frames to the surface, and 426 * resets the camera for a future call to {@link #startPreview()}. 427 */ 428 public native final void stopPreview(); 429 430 /** 431 * Return current preview state. 432 * 433 * FIXME: Unhide before release 434 * @hide 435 */ 436 public native final boolean previewEnabled(); 437 438 /** 439 * Installs a callback to be invoked for every preview frame in addition 440 * to displaying them on the screen. The callback will be repeatedly called 441 * for as long as preview is active. This method can be called at any time, 442 * even while preview is live. Any other preview callbacks are overridden. 443 * 444 * @param cb a callback object that receives a copy of each preview frame, 445 * or null to stop receiving callbacks. 446 */ 447 public final void setPreviewCallback(PreviewCallback cb) { 448 mPreviewCallback = cb; 449 mOneShot = false; 450 mWithBuffer = false; 451 // Always use one-shot mode. We fake camera preview mode by 452 // doing one-shot preview continuously. 453 setHasPreviewCallback(cb != null, false); 454 } 455 456 /** 457 * Installs a callback to be invoked for the next preview frame in addition 458 * to displaying it on the screen. After one invocation, the callback is 459 * cleared. This method can be called any time, even when preview is live. 460 * Any other preview callbacks are overridden. 461 * 462 * @param cb a callback object that receives a copy of the next preview frame, 463 * or null to stop receiving callbacks. 464 */ 465 public final void setOneShotPreviewCallback(PreviewCallback cb) { 466 mPreviewCallback = cb; 467 mOneShot = true; 468 mWithBuffer = false; 469 setHasPreviewCallback(cb != null, false); 470 } 471 472 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 473 474 /** 475 * Installs a callback to be invoked for every preview frame, using buffers 476 * supplied with {@link #addCallbackBuffer(byte[])}, in addition to 477 * displaying them on the screen. The callback will be repeatedly called 478 * for as long as preview is active and buffers are available. 479 * Any other preview callbacks are overridden. 480 * 481 * <p>The purpose of this method is to improve preview efficiency and frame 482 * rate by allowing preview frame memory reuse. You must call 483 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 484 * calling this method -- or no callbacks will received. 485 * 486 * The buffer queue will be cleared if this method is called with a null 487 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 488 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. 489 * 490 * @param cb a callback object that receives a copy of the preview frame, 491 * or null to stop receiving callbacks and clear the buffer queue. 492 * @see #addCallbackBuffer(byte[]) 493 */ 494 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 495 mPreviewCallback = cb; 496 mOneShot = false; 497 mWithBuffer = true; 498 setHasPreviewCallback(cb != null, true); 499 } 500 501 /** 502 * Adds a pre-allocated buffer to the preview callback buffer queue. 503 * Applications can add one or more buffers to the queue. When a preview 504 * frame arrives and there is still at least one available buffer, the 505 * buffer will be used and removed from the queue. Then preview callback is 506 * invoked with the buffer. If a frame arrives and there is no buffer left, 507 * the frame is discarded. Applications should add buffers back when they 508 * finish processing the data in them. 509 * 510 * <p>The size of the buffer is determined by multiplying the preview 511 * image width, height, and bytes per pixel. The width and height can be 512 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 513 * can be computed from 514 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 515 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 516 * 517 * <p>This method is only necessary when 518 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 519 * {@link #setPreviewCallback(PreviewCallback)} or 520 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 521 * are automatically allocated. 522 * 523 * @param callbackBuffer the buffer to add to the queue. 524 * The size should be width * height * bits_per_pixel / 8. 525 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 526 */ 527 public native final void addCallbackBuffer(byte[] callbackBuffer); 528 529 private class EventHandler extends Handler 530 { 531 private Camera mCamera; 532 533 public EventHandler(Camera c, Looper looper) { 534 super(looper); 535 mCamera = c; 536 } 537 538 @Override 539 public void handleMessage(Message msg) { 540 switch(msg.what) { 541 case CAMERA_MSG_SHUTTER: 542 if (mShutterCallback != null) { 543 mShutterCallback.onShutter(); 544 } 545 return; 546 547 case CAMERA_MSG_RAW_IMAGE: 548 if (mRawImageCallback != null) { 549 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 550 } 551 return; 552 553 case CAMERA_MSG_COMPRESSED_IMAGE: 554 if (mJpegCallback != null) { 555 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 556 } 557 return; 558 559 case CAMERA_MSG_PREVIEW_FRAME: 560 if (mPreviewCallback != null) { 561 PreviewCallback cb = mPreviewCallback; 562 if (mOneShot) { 563 // Clear the callback variable before the callback 564 // in case the app calls setPreviewCallback from 565 // the callback function 566 mPreviewCallback = null; 567 } else if (!mWithBuffer) { 568 // We're faking the camera preview mode to prevent 569 // the app from being flooded with preview frames. 570 // Set to oneshot mode again. 571 setHasPreviewCallback(true, false); 572 } 573 cb.onPreviewFrame((byte[])msg.obj, mCamera); 574 } 575 return; 576 577 case CAMERA_MSG_POSTVIEW_FRAME: 578 if (mPostviewCallback != null) { 579 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 580 } 581 return; 582 583 case CAMERA_MSG_FOCUS: 584 if (mAutoFocusCallback != null) { 585 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 586 } 587 return; 588 589 case CAMERA_MSG_ZOOM: 590 if (mZoomListener != null) { 591 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 592 } 593 return; 594 595 case CAMERA_MSG_ERROR : 596 Log.e(TAG, "Error " + msg.arg1); 597 if (mErrorCallback != null) { 598 mErrorCallback.onError(msg.arg1, mCamera); 599 } 600 return; 601 602 default: 603 Log.e(TAG, "Unknown message type " + msg.what); 604 return; 605 } 606 } 607 } 608 609 private static void postEventFromNative(Object camera_ref, 610 int what, int arg1, int arg2, Object obj) 611 { 612 Camera c = (Camera)((WeakReference)camera_ref).get(); 613 if (c == null) 614 return; 615 616 if (c.mEventHandler != null) { 617 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 618 c.mEventHandler.sendMessage(m); 619 } 620 } 621 622 /** 623 * Callback interface used to notify on completion of camera auto focus. 624 * 625 * <p>Devices that do not support auto-focus will receive a "fake" 626 * callback to this interface. If your application needs auto-focus and 627 * should not be installed on devices <em>without</em> auto-focus, you must 628 * declare that your app uses the 629 * {@code android.hardware.camera.autofocus} feature, in the 630 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 631 * manifest element.</p> 632 * 633 * @see #autoFocus(AutoFocusCallback) 634 */ 635 public interface AutoFocusCallback 636 { 637 /** 638 * Called when the camera auto focus completes. If the camera 639 * does not support auto-focus and autoFocus is called, 640 * onAutoFocus will be called immediately with a fake value of 641 * <code>success</code> set to <code>true</code>. 642 * 643 * @param success true if focus was successful, false if otherwise 644 * @param camera the Camera service object 645 */ 646 void onAutoFocus(boolean success, Camera camera); 647 }; 648 649 /** 650 * Starts camera auto-focus and registers a callback function to run when 651 * the camera is focused. This method is only valid when preview is active 652 * (between {@link #startPreview()} and before {@link #stopPreview()}). 653 * 654 * <p>Callers should check 655 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 656 * this method should be called. If the camera does not support auto-focus, 657 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 658 * callback will be called immediately. 659 * 660 * <p>If your application should not be installed 661 * on devices without auto-focus, you must declare that your application 662 * uses auto-focus with the 663 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 664 * manifest element.</p> 665 * 666 * <p>If the current flash mode is not 667 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 668 * fired during auto-focus, depending on the driver and camera hardware.<p> 669 * 670 * @param cb the callback to run 671 * @see #cancelAutoFocus() 672 */ 673 public final void autoFocus(AutoFocusCallback cb) 674 { 675 mAutoFocusCallback = cb; 676 native_autoFocus(); 677 } 678 private native final void native_autoFocus(); 679 680 /** 681 * Cancels any auto-focus function in progress. 682 * Whether or not auto-focus is currently in progress, 683 * this function will return the focus position to the default. 684 * If the camera does not support auto-focus, this is a no-op. 685 * 686 * @see #autoFocus(Camera.AutoFocusCallback) 687 */ 688 public final void cancelAutoFocus() 689 { 690 mAutoFocusCallback = null; 691 native_cancelAutoFocus(); 692 } 693 private native final void native_cancelAutoFocus(); 694 695 /** 696 * Callback interface used to signal the moment of actual image capture. 697 * 698 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 699 */ 700 public interface ShutterCallback 701 { 702 /** 703 * Called as near as possible to the moment when a photo is captured 704 * from the sensor. This is a good opportunity to play a shutter sound 705 * or give other feedback of camera operation. This may be some time 706 * after the photo was triggered, but some time before the actual data 707 * is available. 708 */ 709 void onShutter(); 710 } 711 712 /** 713 * Callback interface used to supply image data from a photo capture. 714 * 715 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 716 */ 717 public interface PictureCallback { 718 /** 719 * Called when image data is available after a picture is taken. 720 * The format of the data depends on the context of the callback 721 * and {@link Camera.Parameters} settings. 722 * 723 * @param data a byte array of the picture data 724 * @param camera the Camera service object 725 */ 726 void onPictureTaken(byte[] data, Camera camera); 727 }; 728 729 /** 730 * Equivalent to takePicture(shutter, raw, null, jpeg). 731 * 732 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 733 */ 734 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 735 PictureCallback jpeg) { 736 takePicture(shutter, raw, null, jpeg); 737 } 738 private native final void native_takePicture(); 739 740 /** 741 * Triggers an asynchronous image capture. The camera service will initiate 742 * a series of callbacks to the application as the image capture progresses. 743 * The shutter callback occurs after the image is captured. This can be used 744 * to trigger a sound to let the user know that image has been captured. The 745 * raw callback occurs when the raw image data is available (NOTE: the data 746 * may be null if the hardware does not have enough memory to make a copy). 747 * The postview callback occurs when a scaled, fully processed postview 748 * image is available (NOTE: not all hardware supports this). The jpeg 749 * callback occurs when the compressed image is available. If the 750 * application does not need a particular callback, a null can be passed 751 * instead of a callback method. 752 * 753 * <p>This method is only valid when preview is active (after 754 * {@link #startPreview()}). Preview will be stopped after the image is 755 * taken; callers must call {@link #startPreview()} again if they want to 756 * re-start preview or take more pictures. 757 * 758 * <p>After calling this method, you must not call {@link #startPreview()} 759 * or take another picture until the JPEG callback has returned. 760 * 761 * @param shutter the callback for image capture moment, or null 762 * @param raw the callback for raw (uncompressed) image data, or null 763 * @param postview callback with postview image data, may be null 764 * @param jpeg the callback for JPEG image data, or null 765 */ 766 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 767 PictureCallback postview, PictureCallback jpeg) { 768 mShutterCallback = shutter; 769 mRawImageCallback = raw; 770 mPostviewCallback = postview; 771 mJpegCallback = jpeg; 772 native_takePicture(); 773 } 774 775 /** 776 * Zooms to the requested value smoothly. The driver will notify {@link 777 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 778 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 779 * is called with value 3. The 780 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 781 * method will be called three times with zoom values 1, 2, and 3. 782 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 783 * Applications should not call startSmoothZoom again or change the zoom 784 * value before zoom stops. If the supplied zoom value equals to the current 785 * zoom value, no zoom callback will be generated. This method is supported 786 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 787 * returns true. 788 * 789 * @param value zoom value. The valid range is 0 to {@link 790 * android.hardware.Camera.Parameters#getMaxZoom}. 791 * @throws IllegalArgumentException if the zoom value is invalid. 792 * @throws RuntimeException if the method fails. 793 * @see #setZoomChangeListener(OnZoomChangeListener) 794 */ 795 public native final void startSmoothZoom(int value); 796 797 /** 798 * Stops the smooth zoom. Applications should wait for the {@link 799 * OnZoomChangeListener} to know when the zoom is actually stopped. This 800 * method is supported if {@link 801 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 802 * 803 * @throws RuntimeException if the method fails. 804 */ 805 public native final void stopSmoothZoom(); 806 807 /** 808 * Set the clockwise rotation of preview display in degrees. This affects 809 * the preview frames and the picture displayed after snapshot. This method 810 * is useful for portrait mode applications. Note that preview display of 811 * front-facing cameras is flipped horizontally before the rotation, that 812 * is, the image is reflected along the central vertical axis of the camera 813 * sensor. So the users can see themselves as looking into a mirror. 814 * 815 * <p>This does not affect the order of byte array passed in {@link 816 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 817 * method is not allowed to be called during preview. 818 * 819 * <p>If you want to make the camera image show in the same orientation as 820 * the display, you can use the following code. 821 * <pre> 822 * public static void setCameraDisplayOrientation(Activity activity, 823 * int cameraId, android.hardware.Camera camera) { 824 * android.hardware.Camera.CameraInfo info = 825 * new android.hardware.Camera.CameraInfo(); 826 * android.hardware.Camera.getCameraInfo(cameraId, info); 827 * int rotation = activity.getWindowManager().getDefaultDisplay() 828 * .getRotation(); 829 * int degrees = 0; 830 * switch (rotation) { 831 * case Surface.ROTATION_0: degrees = 0; break; 832 * case Surface.ROTATION_90: degrees = 90; break; 833 * case Surface.ROTATION_180: degrees = 180; break; 834 * case Surface.ROTATION_270: degrees = 270; break; 835 * } 836 * 837 * int result; 838 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 839 * result = (info.orientation + degrees) % 360; 840 * result = (360 - result) % 360; // compensate the mirror 841 * } else { // back-facing 842 * result = (info.orientation - degrees + 360) % 360; 843 * } 844 * camera.setDisplayOrientation(result); 845 * } 846 * </pre> 847 * @param degrees the angle that the picture will be rotated clockwise. 848 * Valid values are 0, 90, 180, and 270. The starting 849 * position is 0 (landscape). 850 * @see #setPreviewDisplay(SurfaceHolder) 851 */ 852 public native final void setDisplayOrientation(int degrees); 853 854 /** 855 * Callback interface for zoom changes during a smooth zoom operation. 856 * 857 * @see #setZoomChangeListener(OnZoomChangeListener) 858 * @see #startSmoothZoom(int) 859 */ 860 public interface OnZoomChangeListener 861 { 862 /** 863 * Called when the zoom value has changed during a smooth zoom. 864 * 865 * @param zoomValue the current zoom value. In smooth zoom mode, camera 866 * calls this for every new zoom value. 867 * @param stopped whether smooth zoom is stopped. If the value is true, 868 * this is the last zoom update for the application. 869 * @param camera the Camera service object 870 */ 871 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 872 }; 873 874 /** 875 * Registers a listener to be notified when the zoom value is updated by the 876 * camera driver during smooth zoom. 877 * 878 * @param listener the listener to notify 879 * @see #startSmoothZoom(int) 880 */ 881 public final void setZoomChangeListener(OnZoomChangeListener listener) 882 { 883 mZoomListener = listener; 884 } 885 886 // Error codes match the enum in include/ui/Camera.h 887 888 /** 889 * Unspecified camera error. 890 * @see Camera.ErrorCallback 891 */ 892 public static final int CAMERA_ERROR_UNKNOWN = 1; 893 894 /** 895 * Media server died. In this case, the application must release the 896 * Camera object and instantiate a new one. 897 * @see Camera.ErrorCallback 898 */ 899 public static final int CAMERA_ERROR_SERVER_DIED = 100; 900 901 /** 902 * Callback interface for camera error notification. 903 * 904 * @see #setErrorCallback(ErrorCallback) 905 */ 906 public interface ErrorCallback 907 { 908 /** 909 * Callback for camera errors. 910 * @param error error code: 911 * <ul> 912 * <li>{@link #CAMERA_ERROR_UNKNOWN} 913 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 914 * </ul> 915 * @param camera the Camera service object 916 */ 917 void onError(int error, Camera camera); 918 }; 919 920 /** 921 * Registers a callback to be invoked when an error occurs. 922 * @param cb The callback to run 923 */ 924 public final void setErrorCallback(ErrorCallback cb) 925 { 926 mErrorCallback = cb; 927 } 928 929 private native final void native_setParameters(String params); 930 private native final String native_getParameters(); 931 932 /** 933 * Changes the settings for this Camera service. 934 * 935 * @param params the Parameters to use for this Camera service 936 * @throws RuntimeException if any parameter is invalid or not supported. 937 * @see #getParameters() 938 */ 939 public void setParameters(Parameters params) { 940 native_setParameters(params.flatten()); 941 } 942 943 /** 944 * Returns the current settings for this Camera service. 945 * If modifications are made to the returned Parameters, they must be passed 946 * to {@link #setParameters(Camera.Parameters)} to take effect. 947 * 948 * @see #setParameters(Camera.Parameters) 949 */ 950 public Parameters getParameters() { 951 Parameters p = new Parameters(); 952 String s = native_getParameters(); 953 p.unflatten(s); 954 return p; 955 } 956 957 /** 958 * Image size (width and height dimensions). 959 */ 960 public class Size { 961 /** 962 * Sets the dimensions for pictures. 963 * 964 * @param w the photo width (pixels) 965 * @param h the photo height (pixels) 966 */ 967 public Size(int w, int h) { 968 width = w; 969 height = h; 970 } 971 /** 972 * Compares {@code obj} to this size. 973 * 974 * @param obj the object to compare this size with. 975 * @return {@code true} if the width and height of {@code obj} is the 976 * same as those of this size. {@code false} otherwise. 977 */ 978 @Override 979 public boolean equals(Object obj) { 980 if (!(obj instanceof Size)) { 981 return false; 982 } 983 Size s = (Size) obj; 984 return width == s.width && height == s.height; 985 } 986 @Override 987 public int hashCode() { 988 return width * 32713 + height; 989 } 990 /** width of the picture */ 991 public int width; 992 /** height of the picture */ 993 public int height; 994 }; 995 996 /** 997 * Camera service settings. 998 * 999 * <p>To make camera parameters take effect, applications have to call 1000 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1001 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1002 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1003 * is called with the changed parameters object. 1004 * 1005 * <p>Different devices may have different camera capabilities, such as 1006 * picture size or flash modes. The application should query the camera 1007 * capabilities before setting parameters. For example, the application 1008 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1009 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1010 * camera does not support color effects, 1011 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1012 */ 1013 public class Parameters { 1014 // Parameter keys to communicate with the camera driver. 1015 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1016 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1017 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1018 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1019 private static final String KEY_PICTURE_SIZE = "picture-size"; 1020 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1021 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1022 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1023 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1024 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1025 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1026 private static final String KEY_ROTATION = "rotation"; 1027 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1028 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1029 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1030 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1031 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1032 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1033 private static final String KEY_EFFECT = "effect"; 1034 private static final String KEY_ANTIBANDING = "antibanding"; 1035 private static final String KEY_SCENE_MODE = "scene-mode"; 1036 private static final String KEY_FLASH_MODE = "flash-mode"; 1037 private static final String KEY_FOCUS_MODE = "focus-mode"; 1038 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1039 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1040 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1041 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1042 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1043 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1044 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1045 private static final String KEY_ZOOM = "zoom"; 1046 private static final String KEY_MAX_ZOOM = "max-zoom"; 1047 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1048 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1049 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1050 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1051 private static final String KEY_VIDEO_SIZE = "video-size"; 1052 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1053 "preferred-preview-size-for-video"; 1054 1055 // Parameter key suffix for supported values. 1056 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1057 1058 private static final String TRUE = "true"; 1059 1060 // Values for white balance settings. 1061 public static final String WHITE_BALANCE_AUTO = "auto"; 1062 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1063 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1064 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1065 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1066 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1067 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1068 public static final String WHITE_BALANCE_SHADE = "shade"; 1069 1070 // Values for color effect settings. 1071 public static final String EFFECT_NONE = "none"; 1072 public static final String EFFECT_MONO = "mono"; 1073 public static final String EFFECT_NEGATIVE = "negative"; 1074 public static final String EFFECT_SOLARIZE = "solarize"; 1075 public static final String EFFECT_SEPIA = "sepia"; 1076 public static final String EFFECT_POSTERIZE = "posterize"; 1077 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1078 public static final String EFFECT_BLACKBOARD = "blackboard"; 1079 public static final String EFFECT_AQUA = "aqua"; 1080 1081 // Values for antibanding settings. 1082 public static final String ANTIBANDING_AUTO = "auto"; 1083 public static final String ANTIBANDING_50HZ = "50hz"; 1084 public static final String ANTIBANDING_60HZ = "60hz"; 1085 public static final String ANTIBANDING_OFF = "off"; 1086 1087 // Values for flash mode settings. 1088 /** 1089 * Flash will not be fired. 1090 */ 1091 public static final String FLASH_MODE_OFF = "off"; 1092 1093 /** 1094 * Flash will be fired automatically when required. The flash may be fired 1095 * during preview, auto-focus, or snapshot depending on the driver. 1096 */ 1097 public static final String FLASH_MODE_AUTO = "auto"; 1098 1099 /** 1100 * Flash will always be fired during snapshot. The flash may also be 1101 * fired during preview or auto-focus depending on the driver. 1102 */ 1103 public static final String FLASH_MODE_ON = "on"; 1104 1105 /** 1106 * Flash will be fired in red-eye reduction mode. 1107 */ 1108 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1109 1110 /** 1111 * Constant emission of light during preview, auto-focus and snapshot. 1112 * This can also be used for video recording. 1113 */ 1114 public static final String FLASH_MODE_TORCH = "torch"; 1115 1116 /** 1117 * Scene mode is off. 1118 */ 1119 public static final String SCENE_MODE_AUTO = "auto"; 1120 1121 /** 1122 * Take photos of fast moving objects. Same as {@link 1123 * #SCENE_MODE_SPORTS}. 1124 */ 1125 public static final String SCENE_MODE_ACTION = "action"; 1126 1127 /** 1128 * Take people pictures. 1129 */ 1130 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1131 1132 /** 1133 * Take pictures on distant objects. 1134 */ 1135 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1136 1137 /** 1138 * Take photos at night. 1139 */ 1140 public static final String SCENE_MODE_NIGHT = "night"; 1141 1142 /** 1143 * Take people pictures at night. 1144 */ 1145 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1146 1147 /** 1148 * Take photos in a theater. Flash light is off. 1149 */ 1150 public static final String SCENE_MODE_THEATRE = "theatre"; 1151 1152 /** 1153 * Take pictures on the beach. 1154 */ 1155 public static final String SCENE_MODE_BEACH = "beach"; 1156 1157 /** 1158 * Take pictures on the snow. 1159 */ 1160 public static final String SCENE_MODE_SNOW = "snow"; 1161 1162 /** 1163 * Take sunset photos. 1164 */ 1165 public static final String SCENE_MODE_SUNSET = "sunset"; 1166 1167 /** 1168 * Avoid blurry pictures (for example, due to hand shake). 1169 */ 1170 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1171 1172 /** 1173 * For shooting firework displays. 1174 */ 1175 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1176 1177 /** 1178 * Take photos of fast moving objects. Same as {@link 1179 * #SCENE_MODE_ACTION}. 1180 */ 1181 public static final String SCENE_MODE_SPORTS = "sports"; 1182 1183 /** 1184 * Take indoor low-light shot. 1185 */ 1186 public static final String SCENE_MODE_PARTY = "party"; 1187 1188 /** 1189 * Capture the naturally warm color of scenes lit by candles. 1190 */ 1191 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1192 1193 /** 1194 * Applications are looking for a barcode. Camera driver will be 1195 * optimized for barcode reading. 1196 */ 1197 public static final String SCENE_MODE_BARCODE = "barcode"; 1198 1199 /** 1200 * Auto-focus mode. Applications should call {@link 1201 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1202 */ 1203 public static final String FOCUS_MODE_AUTO = "auto"; 1204 1205 /** 1206 * Focus is set at infinity. Applications should not call 1207 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1208 */ 1209 public static final String FOCUS_MODE_INFINITY = "infinity"; 1210 1211 /** 1212 * Macro (close-up) focus mode. Applications should call 1213 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1214 * mode. 1215 */ 1216 public static final String FOCUS_MODE_MACRO = "macro"; 1217 1218 /** 1219 * Focus is fixed. The camera is always in this mode if the focus is not 1220 * adjustable. If the camera has auto-focus, this mode can fix the 1221 * focus, which is usually at hyperfocal distance. Applications should 1222 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1223 */ 1224 public static final String FOCUS_MODE_FIXED = "fixed"; 1225 1226 /** 1227 * Extended depth of field (EDOF). Focusing is done digitally and 1228 * continuously. Applications should not call {@link 1229 * #autoFocus(AutoFocusCallback)} in this mode. 1230 */ 1231 public static final String FOCUS_MODE_EDOF = "edof"; 1232 1233 /** 1234 * Continuous auto focus mode intended for video recording. The camera 1235 * continuously tries to focus. This is ideal for shooting video. 1236 * Applications still can call {@link 1237 * #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1238 * Camera.PictureCallback)} in this mode but the subject may not be in 1239 * focus. Auto focus starts when the parameter is set. Applications 1240 * should not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1241 * To stop continuous focus, applications should change the focus mode 1242 * to other modes. 1243 */ 1244 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1245 1246 // Indices for focus distance array. 1247 /** 1248 * The array index of near focus distance for use with 1249 * {@link #getFocusDistances(float[])}. 1250 */ 1251 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1252 1253 /** 1254 * The array index of optimal focus distance for use with 1255 * {@link #getFocusDistances(float[])}. 1256 */ 1257 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1258 1259 /** 1260 * The array index of far focus distance for use with 1261 * {@link #getFocusDistances(float[])}. 1262 */ 1263 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1264 1265 /** 1266 * The array index of minimum preview fps for use with {@link 1267 * #getPreviewFpsRange(int[])} or {@link 1268 * #getSupportedPreviewFpsRange()}. 1269 */ 1270 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1271 1272 /** 1273 * The array index of maximum preview fps for use with {@link 1274 * #getPreviewFpsRange(int[])} or {@link 1275 * #getSupportedPreviewFpsRange()}. 1276 */ 1277 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1278 1279 // Formats for setPreviewFormat and setPictureFormat. 1280 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1281 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1282 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1283 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1284 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1285 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1286 1287 private HashMap<String, String> mMap; 1288 1289 private Parameters() { 1290 mMap = new HashMap<String, String>(); 1291 } 1292 1293 /** 1294 * Writes the current Parameters to the log. 1295 * @hide 1296 * @deprecated 1297 */ 1298 public void dump() { 1299 Log.e(TAG, "dump: size=" + mMap.size()); 1300 for (String k : mMap.keySet()) { 1301 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1302 } 1303 } 1304 1305 /** 1306 * Creates a single string with all the parameters set in 1307 * this Parameters object. 1308 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1309 * 1310 * @return a String with all values from this Parameters object, in 1311 * semi-colon delimited key-value pairs 1312 */ 1313 public String flatten() { 1314 StringBuilder flattened = new StringBuilder(); 1315 for (String k : mMap.keySet()) { 1316 flattened.append(k); 1317 flattened.append("="); 1318 flattened.append(mMap.get(k)); 1319 flattened.append(";"); 1320 } 1321 // chop off the extra semicolon at the end 1322 flattened.deleteCharAt(flattened.length()-1); 1323 return flattened.toString(); 1324 } 1325 1326 /** 1327 * Takes a flattened string of parameters and adds each one to 1328 * this Parameters object. 1329 * <p>The {@link #flatten()} method does the reverse.</p> 1330 * 1331 * @param flattened a String of parameters (key-value paired) that 1332 * are semi-colon delimited 1333 */ 1334 public void unflatten(String flattened) { 1335 mMap.clear(); 1336 1337 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1338 while (tokenizer.hasMoreElements()) { 1339 String kv = tokenizer.nextToken(); 1340 int pos = kv.indexOf('='); 1341 if (pos == -1) { 1342 continue; 1343 } 1344 String k = kv.substring(0, pos); 1345 String v = kv.substring(pos + 1); 1346 mMap.put(k, v); 1347 } 1348 } 1349 1350 public void remove(String key) { 1351 mMap.remove(key); 1352 } 1353 1354 /** 1355 * Sets a String parameter. 1356 * 1357 * @param key the key name for the parameter 1358 * @param value the String value of the parameter 1359 */ 1360 public void set(String key, String value) { 1361 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1362 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1363 return; 1364 } 1365 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1366 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1367 return; 1368 } 1369 1370 mMap.put(key, value); 1371 } 1372 1373 /** 1374 * Sets an integer parameter. 1375 * 1376 * @param key the key name for the parameter 1377 * @param value the int value of the parameter 1378 */ 1379 public void set(String key, int value) { 1380 mMap.put(key, Integer.toString(value)); 1381 } 1382 1383 /** 1384 * Returns the value of a String parameter. 1385 * 1386 * @param key the key name for the parameter 1387 * @return the String value of the parameter 1388 */ 1389 public String get(String key) { 1390 return mMap.get(key); 1391 } 1392 1393 /** 1394 * Returns the value of an integer parameter. 1395 * 1396 * @param key the key name for the parameter 1397 * @return the int value of the parameter 1398 */ 1399 public int getInt(String key) { 1400 return Integer.parseInt(mMap.get(key)); 1401 } 1402 1403 /** 1404 * Sets the dimensions for preview pictures. 1405 * 1406 * The sides of width and height are based on camera orientation. That 1407 * is, the preview size is the size before it is rotated by display 1408 * orientation. So applications need to consider the display orientation 1409 * while setting preview size. For example, suppose the camera supports 1410 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1411 * preview ratio. If the display orientation is set to 0 or 180, preview 1412 * size should be set to 480x320. If the display orientation is set to 1413 * 90 or 270, preview size should be set to 320x480. The display 1414 * orientation should also be considered while setting picture size and 1415 * thumbnail size. 1416 * 1417 * @param width the width of the pictures, in pixels 1418 * @param height the height of the pictures, in pixels 1419 * @see #setDisplayOrientation(int) 1420 * @see #getCameraInfo(int, CameraInfo) 1421 * @see #setPictureSize(int, int) 1422 * @see #setJpegThumbnailSize(int, int) 1423 */ 1424 public void setPreviewSize(int width, int height) { 1425 String v = Integer.toString(width) + "x" + Integer.toString(height); 1426 set(KEY_PREVIEW_SIZE, v); 1427 } 1428 1429 /** 1430 * Returns the dimensions setting for preview pictures. 1431 * 1432 * @return a Size object with the width and height setting 1433 * for the preview picture 1434 */ 1435 public Size getPreviewSize() { 1436 String pair = get(KEY_PREVIEW_SIZE); 1437 return strToSize(pair); 1438 } 1439 1440 /** 1441 * Gets the supported preview sizes. 1442 * 1443 * @return a list of Size object. This method will always return a list 1444 * with at least one element. 1445 */ 1446 public List<Size> getSupportedPreviewSizes() { 1447 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1448 return splitSize(str); 1449 } 1450 1451 /** 1452 * Gets the supported video frame sizes that can be used by 1453 * MediaRecorder. 1454 * 1455 * If the returned list is not null, the returned list will contain at 1456 * least one Size and one of the sizes in the returned list must be 1457 * passed to MediaRecorder.setVideoSize() for camcorder application if 1458 * camera is used as the video source. In this case, the size of the 1459 * preview can be different from the resolution of the recorded video 1460 * during video recording. 1461 * 1462 * @return a list of Size object if camera has separate preview and 1463 * video output; otherwise, null is returned. 1464 * @see #getPreferredPreviewSizeForVideo() 1465 */ 1466 public List<Size> getSupportedVideoSizes() { 1467 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1468 return splitSize(str); 1469 } 1470 1471 /** 1472 * Returns the preferred or recommended preview size (width and height) 1473 * in pixels for video recording. Camcorder applications should 1474 * set the preview size to a value that is not larger than the 1475 * preferred preview size. In other words, the product of the width 1476 * and height of the preview size should not be larger than that of 1477 * the preferred preview size. In addition, we recommend to choose a 1478 * preview size that has the same aspect ratio as the resolution of 1479 * video to be recorded. 1480 * 1481 * @return the preferred preview size (width and height) in pixels for 1482 * video recording if getSupportedVideoSizes() does not return 1483 * null; otherwise, null is returned. 1484 * @see #getSupportedVideoSizes() 1485 */ 1486 public Size getPreferredPreviewSizeForVideo() { 1487 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1488 return strToSize(pair); 1489 } 1490 1491 /** 1492 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1493 * applications set both width and height to 0, EXIF will not contain 1494 * thumbnail. 1495 * 1496 * Applications need to consider the display orientation. See {@link 1497 * #setPreviewSize(int,int)} for reference. 1498 * 1499 * @param width the width of the thumbnail, in pixels 1500 * @param height the height of the thumbnail, in pixels 1501 * @see #setPreviewSize(int,int) 1502 */ 1503 public void setJpegThumbnailSize(int width, int height) { 1504 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1505 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1506 } 1507 1508 /** 1509 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1510 * 1511 * @return a Size object with the height and width setting for the EXIF 1512 * thumbnails 1513 */ 1514 public Size getJpegThumbnailSize() { 1515 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1516 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1517 } 1518 1519 /** 1520 * Gets the supported jpeg thumbnail sizes. 1521 * 1522 * @return a list of Size object. This method will always return a list 1523 * with at least two elements. Size 0,0 (no thumbnail) is always 1524 * supported. 1525 */ 1526 public List<Size> getSupportedJpegThumbnailSizes() { 1527 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1528 return splitSize(str); 1529 } 1530 1531 /** 1532 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1533 * 1534 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1535 * to 100, with 100 being the best. 1536 */ 1537 public void setJpegThumbnailQuality(int quality) { 1538 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1539 } 1540 1541 /** 1542 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1543 * 1544 * @return the JPEG quality setting of the EXIF thumbnail. 1545 */ 1546 public int getJpegThumbnailQuality() { 1547 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1548 } 1549 1550 /** 1551 * Sets Jpeg quality of captured picture. 1552 * 1553 * @param quality the JPEG quality of captured picture. The range is 1 1554 * to 100, with 100 being the best. 1555 */ 1556 public void setJpegQuality(int quality) { 1557 set(KEY_JPEG_QUALITY, quality); 1558 } 1559 1560 /** 1561 * Returns the quality setting for the JPEG picture. 1562 * 1563 * @return the JPEG picture quality setting. 1564 */ 1565 public int getJpegQuality() { 1566 return getInt(KEY_JPEG_QUALITY); 1567 } 1568 1569 /** 1570 * Sets the rate at which preview frames are received. This is the 1571 * target frame rate. The actual frame rate depends on the driver. 1572 * 1573 * @param fps the frame rate (frames per second) 1574 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 1575 */ 1576 @Deprecated 1577 public void setPreviewFrameRate(int fps) { 1578 set(KEY_PREVIEW_FRAME_RATE, fps); 1579 } 1580 1581 /** 1582 * Returns the setting for the rate at which preview frames are 1583 * received. This is the target frame rate. The actual frame rate 1584 * depends on the driver. 1585 * 1586 * @return the frame rate setting (frames per second) 1587 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 1588 */ 1589 @Deprecated 1590 public int getPreviewFrameRate() { 1591 return getInt(KEY_PREVIEW_FRAME_RATE); 1592 } 1593 1594 /** 1595 * Gets the supported preview frame rates. 1596 * 1597 * @return a list of supported preview frame rates. null if preview 1598 * frame rate setting is not supported. 1599 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 1600 */ 1601 @Deprecated 1602 public List<Integer> getSupportedPreviewFrameRates() { 1603 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1604 return splitInt(str); 1605 } 1606 1607 /** 1608 * Sets the maximum and maximum preview fps. This controls the rate of 1609 * preview frames received in {@link PreviewCallback}. The minimum and 1610 * maximum preview fps must be one of the elements from {@link 1611 * #getSupportedPreviewFpsRange}. 1612 * 1613 * @param min the minimum preview fps (scaled by 1000). 1614 * @param max the maximum preview fps (scaled by 1000). 1615 * @throws RuntimeException if fps range is invalid. 1616 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 1617 * @see #getSupportedPreviewFpsRange() 1618 */ 1619 public void setPreviewFpsRange(int min, int max) { 1620 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 1621 } 1622 1623 /** 1624 * Returns the current minimum and maximum preview fps. The values are 1625 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 1626 * 1627 * @return range the minimum and maximum preview fps (scaled by 1000). 1628 * @see #PREVIEW_FPS_MIN_INDEX 1629 * @see #PREVIEW_FPS_MAX_INDEX 1630 * @see #getSupportedPreviewFpsRange() 1631 */ 1632 public void getPreviewFpsRange(int[] range) { 1633 if (range == null || range.length != 2) { 1634 throw new IllegalArgumentException( 1635 "range must be an array with two elements."); 1636 } 1637 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 1638 } 1639 1640 /** 1641 * Gets the supported preview fps (frame-per-second) ranges. Each range 1642 * contains a minimum fps and maximum fps. If minimum fps equals to 1643 * maximum fps, the camera outputs frames in fixed frame rate. If not, 1644 * the camera outputs frames in auto frame rate. The actual frame rate 1645 * fluctuates between the minimum and the maximum. The values are 1646 * multiplied by 1000 and represented in integers. For example, if frame 1647 * rate is 26.623 frames per second, the value is 26623. 1648 * 1649 * @return a list of supported preview fps ranges. This method returns a 1650 * list with at least one element. Every element is an int array 1651 * of two values - minimum fps and maximum fps. The list is 1652 * sorted from small to large (first by maximum fps and then 1653 * minimum fps). 1654 * @see #PREVIEW_FPS_MIN_INDEX 1655 * @see #PREVIEW_FPS_MAX_INDEX 1656 */ 1657 public List<int[]> getSupportedPreviewFpsRange() { 1658 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 1659 return splitRange(str); 1660 } 1661 1662 /** 1663 * Sets the image format for preview pictures. 1664 * <p>If this is never called, the default format will be 1665 * {@link android.graphics.ImageFormat#NV21}, which 1666 * uses the NV21 encoding format.</p> 1667 * 1668 * @param pixel_format the desired preview picture format, defined 1669 * by one of the {@link android.graphics.ImageFormat} constants. 1670 * (E.g., <var>ImageFormat.NV21</var> (default), 1671 * <var>ImageFormat.RGB_565</var>, or 1672 * <var>ImageFormat.JPEG</var>) 1673 * @see android.graphics.ImageFormat 1674 */ 1675 public void setPreviewFormat(int pixel_format) { 1676 String s = cameraFormatForPixelFormat(pixel_format); 1677 if (s == null) { 1678 throw new IllegalArgumentException( 1679 "Invalid pixel_format=" + pixel_format); 1680 } 1681 1682 set(KEY_PREVIEW_FORMAT, s); 1683 } 1684 1685 /** 1686 * Returns the image format for preview frames got from 1687 * {@link PreviewCallback}. 1688 * 1689 * @return the preview format. 1690 * @see android.graphics.ImageFormat 1691 */ 1692 public int getPreviewFormat() { 1693 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1694 } 1695 1696 /** 1697 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 1698 * is always supported. {@link android.graphics.ImageFormat#YV12} 1699 * is always supported since API level 12. 1700 * 1701 * @return a list of supported preview formats. This method will always 1702 * return a list with at least one element. 1703 * @see android.graphics.ImageFormat 1704 */ 1705 public List<Integer> getSupportedPreviewFormats() { 1706 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1707 ArrayList<Integer> formats = new ArrayList<Integer>(); 1708 for (String s : split(str)) { 1709 int f = pixelFormatForCameraFormat(s); 1710 if (f == ImageFormat.UNKNOWN) continue; 1711 formats.add(f); 1712 } 1713 return formats; 1714 } 1715 1716 /** 1717 * Sets the dimensions for pictures. 1718 * 1719 * Applications need to consider the display orientation. See {@link 1720 * #setPreviewSize(int,int)} for reference. 1721 * 1722 * @param width the width for pictures, in pixels 1723 * @param height the height for pictures, in pixels 1724 * @see #setPreviewSize(int,int) 1725 * 1726 */ 1727 public void setPictureSize(int width, int height) { 1728 String v = Integer.toString(width) + "x" + Integer.toString(height); 1729 set(KEY_PICTURE_SIZE, v); 1730 } 1731 1732 /** 1733 * Returns the dimension setting for pictures. 1734 * 1735 * @return a Size object with the height and width setting 1736 * for pictures 1737 */ 1738 public Size getPictureSize() { 1739 String pair = get(KEY_PICTURE_SIZE); 1740 return strToSize(pair); 1741 } 1742 1743 /** 1744 * Gets the supported picture sizes. 1745 * 1746 * @return a list of supported picture sizes. This method will always 1747 * return a list with at least one element. 1748 */ 1749 public List<Size> getSupportedPictureSizes() { 1750 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1751 return splitSize(str); 1752 } 1753 1754 /** 1755 * Sets the image format for pictures. 1756 * 1757 * @param pixel_format the desired picture format 1758 * (<var>ImageFormat.NV21</var>, 1759 * <var>ImageFormat.RGB_565</var>, or 1760 * <var>ImageFormat.JPEG</var>) 1761 * @see android.graphics.ImageFormat 1762 */ 1763 public void setPictureFormat(int pixel_format) { 1764 String s = cameraFormatForPixelFormat(pixel_format); 1765 if (s == null) { 1766 throw new IllegalArgumentException( 1767 "Invalid pixel_format=" + pixel_format); 1768 } 1769 1770 set(KEY_PICTURE_FORMAT, s); 1771 } 1772 1773 /** 1774 * Returns the image format for pictures. 1775 * 1776 * @return the picture format 1777 * @see android.graphics.ImageFormat 1778 */ 1779 public int getPictureFormat() { 1780 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1781 } 1782 1783 /** 1784 * Gets the supported picture formats. 1785 * 1786 * @return supported picture formats. This method will always return a 1787 * list with at least one element. 1788 * @see android.graphics.ImageFormat 1789 */ 1790 public List<Integer> getSupportedPictureFormats() { 1791 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1792 ArrayList<Integer> formats = new ArrayList<Integer>(); 1793 for (String s : split(str)) { 1794 int f = pixelFormatForCameraFormat(s); 1795 if (f == ImageFormat.UNKNOWN) continue; 1796 formats.add(f); 1797 } 1798 return formats; 1799 } 1800 1801 private String cameraFormatForPixelFormat(int pixel_format) { 1802 switch(pixel_format) { 1803 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1804 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1805 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1806 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 1807 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1808 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1809 default: return null; 1810 } 1811 } 1812 1813 private int pixelFormatForCameraFormat(String format) { 1814 if (format == null) 1815 return ImageFormat.UNKNOWN; 1816 1817 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1818 return ImageFormat.NV16; 1819 1820 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1821 return ImageFormat.NV21; 1822 1823 if (format.equals(PIXEL_FORMAT_YUV422I)) 1824 return ImageFormat.YUY2; 1825 1826 if (format.equals(PIXEL_FORMAT_YUV420P)) 1827 return ImageFormat.YV12; 1828 1829 if (format.equals(PIXEL_FORMAT_RGB565)) 1830 return ImageFormat.RGB_565; 1831 1832 if (format.equals(PIXEL_FORMAT_JPEG)) 1833 return ImageFormat.JPEG; 1834 1835 return ImageFormat.UNKNOWN; 1836 } 1837 1838 /** 1839 * Sets the rotation angle in degrees relative to the orientation of 1840 * the camera. This affects the pictures returned from JPEG {@link 1841 * PictureCallback}. The camera driver may set orientation in the 1842 * EXIF header without rotating the picture. Or the driver may rotate 1843 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 1844 * the orientation in the EXIF header will be missing or 1 (row #0 is 1845 * top and column #0 is left side). 1846 * 1847 * <p>If applications want to rotate the picture to match the orientation 1848 * of what users see, apps should use {@link 1849 * android.view.OrientationEventListener} and {@link CameraInfo}. 1850 * The value from OrientationEventListener is relative to the natural 1851 * orientation of the device. CameraInfo.orientation is the angle 1852 * between camera orientation and natural device orientation. The sum 1853 * of the two is the rotation angle for back-facing camera. The 1854 * difference of the two is the rotation angle for front-facing camera. 1855 * Note that the JPEG pictures of front-facing cameras are not mirrored 1856 * as in preview display. 1857 * 1858 * <p>For example, suppose the natural orientation of the device is 1859 * portrait. The device is rotated 270 degrees clockwise, so the device 1860 * orientation is 270. Suppose a back-facing camera sensor is mounted in 1861 * landscape and the top side of the camera sensor is aligned with the 1862 * right edge of the display in natural orientation. So the camera 1863 * orientation is 90. The rotation should be set to 0 (270 + 90). 1864 * 1865 * <p>The reference code is as follows. 1866 * 1867 * <pre> 1868 * public void public void onOrientationChanged(int orientation) { 1869 * if (orientation == ORIENTATION_UNKNOWN) return; 1870 * android.hardware.Camera.CameraInfo info = 1871 * new android.hardware.Camera.CameraInfo(); 1872 * android.hardware.Camera.getCameraInfo(cameraId, info); 1873 * orientation = (orientation + 45) / 90 * 90; 1874 * int rotation = 0; 1875 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 1876 * rotation = (info.orientation - orientation + 360) % 360; 1877 * } else { // back-facing camera 1878 * rotation = (info.orientation + orientation) % 360; 1879 * } 1880 * mParameters.setRotation(rotation); 1881 * } 1882 * </pre> 1883 * 1884 * @param rotation The rotation angle in degrees relative to the 1885 * orientation of the camera. Rotation can only be 0, 1886 * 90, 180 or 270. 1887 * @throws IllegalArgumentException if rotation value is invalid. 1888 * @see android.view.OrientationEventListener 1889 * @see #getCameraInfo(int, CameraInfo) 1890 */ 1891 public void setRotation(int rotation) { 1892 if (rotation == 0 || rotation == 90 || rotation == 180 1893 || rotation == 270) { 1894 set(KEY_ROTATION, Integer.toString(rotation)); 1895 } else { 1896 throw new IllegalArgumentException( 1897 "Invalid rotation=" + rotation); 1898 } 1899 } 1900 1901 /** 1902 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1903 * header. 1904 * 1905 * @param latitude GPS latitude coordinate. 1906 */ 1907 public void setGpsLatitude(double latitude) { 1908 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1909 } 1910 1911 /** 1912 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1913 * header. 1914 * 1915 * @param longitude GPS longitude coordinate. 1916 */ 1917 public void setGpsLongitude(double longitude) { 1918 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1919 } 1920 1921 /** 1922 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1923 * 1924 * @param altitude GPS altitude in meters. 1925 */ 1926 public void setGpsAltitude(double altitude) { 1927 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1928 } 1929 1930 /** 1931 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1932 * 1933 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1934 * 1970). 1935 */ 1936 public void setGpsTimestamp(long timestamp) { 1937 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1938 } 1939 1940 /** 1941 * Sets GPS processing method. It will store up to 32 characters 1942 * in JPEG EXIF header. 1943 * 1944 * @param processing_method The processing method to get this location. 1945 */ 1946 public void setGpsProcessingMethod(String processing_method) { 1947 set(KEY_GPS_PROCESSING_METHOD, processing_method); 1948 } 1949 1950 /** 1951 * Removes GPS latitude, longitude, altitude, and timestamp from the 1952 * parameters. 1953 */ 1954 public void removeGpsData() { 1955 remove(KEY_GPS_LATITUDE); 1956 remove(KEY_GPS_LONGITUDE); 1957 remove(KEY_GPS_ALTITUDE); 1958 remove(KEY_GPS_TIMESTAMP); 1959 remove(KEY_GPS_PROCESSING_METHOD); 1960 } 1961 1962 /** 1963 * Gets the current white balance setting. 1964 * 1965 * @return current white balance. null if white balance setting is not 1966 * supported. 1967 * @see #WHITE_BALANCE_AUTO 1968 * @see #WHITE_BALANCE_INCANDESCENT 1969 * @see #WHITE_BALANCE_FLUORESCENT 1970 * @see #WHITE_BALANCE_WARM_FLUORESCENT 1971 * @see #WHITE_BALANCE_DAYLIGHT 1972 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 1973 * @see #WHITE_BALANCE_TWILIGHT 1974 * @see #WHITE_BALANCE_SHADE 1975 * 1976 */ 1977 public String getWhiteBalance() { 1978 return get(KEY_WHITE_BALANCE); 1979 } 1980 1981 /** 1982 * Sets the white balance. 1983 * 1984 * @param value new white balance. 1985 * @see #getWhiteBalance() 1986 */ 1987 public void setWhiteBalance(String value) { 1988 set(KEY_WHITE_BALANCE, value); 1989 } 1990 1991 /** 1992 * Gets the supported white balance. 1993 * 1994 * @return a list of supported white balance. null if white balance 1995 * setting is not supported. 1996 * @see #getWhiteBalance() 1997 */ 1998 public List<String> getSupportedWhiteBalance() { 1999 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2000 return split(str); 2001 } 2002 2003 /** 2004 * Gets the current color effect setting. 2005 * 2006 * @return current color effect. null if color effect 2007 * setting is not supported. 2008 * @see #EFFECT_NONE 2009 * @see #EFFECT_MONO 2010 * @see #EFFECT_NEGATIVE 2011 * @see #EFFECT_SOLARIZE 2012 * @see #EFFECT_SEPIA 2013 * @see #EFFECT_POSTERIZE 2014 * @see #EFFECT_WHITEBOARD 2015 * @see #EFFECT_BLACKBOARD 2016 * @see #EFFECT_AQUA 2017 */ 2018 public String getColorEffect() { 2019 return get(KEY_EFFECT); 2020 } 2021 2022 /** 2023 * Sets the current color effect setting. 2024 * 2025 * @param value new color effect. 2026 * @see #getColorEffect() 2027 */ 2028 public void setColorEffect(String value) { 2029 set(KEY_EFFECT, value); 2030 } 2031 2032 /** 2033 * Gets the supported color effects. 2034 * 2035 * @return a list of supported color effects. null if color effect 2036 * setting is not supported. 2037 * @see #getColorEffect() 2038 */ 2039 public List<String> getSupportedColorEffects() { 2040 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2041 return split(str); 2042 } 2043 2044 2045 /** 2046 * Gets the current antibanding setting. 2047 * 2048 * @return current antibanding. null if antibanding setting is not 2049 * supported. 2050 * @see #ANTIBANDING_AUTO 2051 * @see #ANTIBANDING_50HZ 2052 * @see #ANTIBANDING_60HZ 2053 * @see #ANTIBANDING_OFF 2054 */ 2055 public String getAntibanding() { 2056 return get(KEY_ANTIBANDING); 2057 } 2058 2059 /** 2060 * Sets the antibanding. 2061 * 2062 * @param antibanding new antibanding value. 2063 * @see #getAntibanding() 2064 */ 2065 public void setAntibanding(String antibanding) { 2066 set(KEY_ANTIBANDING, antibanding); 2067 } 2068 2069 /** 2070 * Gets the supported antibanding values. 2071 * 2072 * @return a list of supported antibanding values. null if antibanding 2073 * setting is not supported. 2074 * @see #getAntibanding() 2075 */ 2076 public List<String> getSupportedAntibanding() { 2077 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2078 return split(str); 2079 } 2080 2081 /** 2082 * Gets the current scene mode setting. 2083 * 2084 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2085 * setting is not supported. 2086 * @see #SCENE_MODE_AUTO 2087 * @see #SCENE_MODE_ACTION 2088 * @see #SCENE_MODE_PORTRAIT 2089 * @see #SCENE_MODE_LANDSCAPE 2090 * @see #SCENE_MODE_NIGHT 2091 * @see #SCENE_MODE_NIGHT_PORTRAIT 2092 * @see #SCENE_MODE_THEATRE 2093 * @see #SCENE_MODE_BEACH 2094 * @see #SCENE_MODE_SNOW 2095 * @see #SCENE_MODE_SUNSET 2096 * @see #SCENE_MODE_STEADYPHOTO 2097 * @see #SCENE_MODE_FIREWORKS 2098 * @see #SCENE_MODE_SPORTS 2099 * @see #SCENE_MODE_PARTY 2100 * @see #SCENE_MODE_CANDLELIGHT 2101 */ 2102 public String getSceneMode() { 2103 return get(KEY_SCENE_MODE); 2104 } 2105 2106 /** 2107 * Sets the scene mode. Changing scene mode may override other 2108 * parameters (such as flash mode, focus mode, white balance). For 2109 * example, suppose originally flash mode is on and supported flash 2110 * modes are on/off. In night scene mode, both flash mode and supported 2111 * flash mode may be changed to off. After setting scene mode, 2112 * applications should call getParameters to know if some parameters are 2113 * changed. 2114 * 2115 * @param value scene mode. 2116 * @see #getSceneMode() 2117 */ 2118 public void setSceneMode(String value) { 2119 set(KEY_SCENE_MODE, value); 2120 } 2121 2122 /** 2123 * Gets the supported scene modes. 2124 * 2125 * @return a list of supported scene modes. null if scene mode setting 2126 * is not supported. 2127 * @see #getSceneMode() 2128 */ 2129 public List<String> getSupportedSceneModes() { 2130 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2131 return split(str); 2132 } 2133 2134 /** 2135 * Gets the current flash mode setting. 2136 * 2137 * @return current flash mode. null if flash mode setting is not 2138 * supported. 2139 * @see #FLASH_MODE_OFF 2140 * @see #FLASH_MODE_AUTO 2141 * @see #FLASH_MODE_ON 2142 * @see #FLASH_MODE_RED_EYE 2143 * @see #FLASH_MODE_TORCH 2144 */ 2145 public String getFlashMode() { 2146 return get(KEY_FLASH_MODE); 2147 } 2148 2149 /** 2150 * Sets the flash mode. 2151 * 2152 * @param value flash mode. 2153 * @see #getFlashMode() 2154 */ 2155 public void setFlashMode(String value) { 2156 set(KEY_FLASH_MODE, value); 2157 } 2158 2159 /** 2160 * Gets the supported flash modes. 2161 * 2162 * @return a list of supported flash modes. null if flash mode setting 2163 * is not supported. 2164 * @see #getFlashMode() 2165 */ 2166 public List<String> getSupportedFlashModes() { 2167 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2168 return split(str); 2169 } 2170 2171 /** 2172 * Gets the current focus mode setting. 2173 * 2174 * @return current focus mode. This method will always return a non-null 2175 * value. Applications should call {@link 2176 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2177 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2178 * @see #FOCUS_MODE_AUTO 2179 * @see #FOCUS_MODE_INFINITY 2180 * @see #FOCUS_MODE_MACRO 2181 * @see #FOCUS_MODE_FIXED 2182 * @see #FOCUS_MODE_EDOF 2183 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2184 */ 2185 public String getFocusMode() { 2186 return get(KEY_FOCUS_MODE); 2187 } 2188 2189 /** 2190 * Sets the focus mode. 2191 * 2192 * @param value focus mode. 2193 * @see #getFocusMode() 2194 */ 2195 public void setFocusMode(String value) { 2196 set(KEY_FOCUS_MODE, value); 2197 } 2198 2199 /** 2200 * Gets the supported focus modes. 2201 * 2202 * @return a list of supported focus modes. This method will always 2203 * return a list with at least one element. 2204 * @see #getFocusMode() 2205 */ 2206 public List<String> getSupportedFocusModes() { 2207 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2208 return split(str); 2209 } 2210 2211 /** 2212 * Gets the focal length (in millimeter) of the camera. 2213 * 2214 * @return the focal length. This method will always return a valid 2215 * value. 2216 */ 2217 public float getFocalLength() { 2218 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2219 } 2220 2221 /** 2222 * Gets the horizontal angle of view in degrees. 2223 * 2224 * @return horizontal angle of view. This method will always return a 2225 * valid value. 2226 */ 2227 public float getHorizontalViewAngle() { 2228 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2229 } 2230 2231 /** 2232 * Gets the vertical angle of view in degrees. 2233 * 2234 * @return vertical angle of view. This method will always return a 2235 * valid value. 2236 */ 2237 public float getVerticalViewAngle() { 2238 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2239 } 2240 2241 /** 2242 * Gets the current exposure compensation index. 2243 * 2244 * @return current exposure compensation index. The range is {@link 2245 * #getMinExposureCompensation} to {@link 2246 * #getMaxExposureCompensation}. 0 means exposure is not 2247 * adjusted. 2248 */ 2249 public int getExposureCompensation() { 2250 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2251 } 2252 2253 /** 2254 * Sets the exposure compensation index. 2255 * 2256 * @param value exposure compensation index. The valid value range is 2257 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2258 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2259 * not adjusted. Application should call 2260 * getMinExposureCompensation and getMaxExposureCompensation to 2261 * know if exposure compensation is supported. 2262 */ 2263 public void setExposureCompensation(int value) { 2264 set(KEY_EXPOSURE_COMPENSATION, value); 2265 } 2266 2267 /** 2268 * Gets the maximum exposure compensation index. 2269 * 2270 * @return maximum exposure compensation index (>=0). If both this 2271 * method and {@link #getMinExposureCompensation} return 0, 2272 * exposure compensation is not supported. 2273 */ 2274 public int getMaxExposureCompensation() { 2275 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2276 } 2277 2278 /** 2279 * Gets the minimum exposure compensation index. 2280 * 2281 * @return minimum exposure compensation index (<=0). If both this 2282 * method and {@link #getMaxExposureCompensation} return 0, 2283 * exposure compensation is not supported. 2284 */ 2285 public int getMinExposureCompensation() { 2286 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2287 } 2288 2289 /** 2290 * Gets the exposure compensation step. 2291 * 2292 * @return exposure compensation step. Applications can get EV by 2293 * multiplying the exposure compensation index and step. Ex: if 2294 * exposure compensation index is -6 and step is 0.333333333, EV 2295 * is -2. 2296 */ 2297 public float getExposureCompensationStep() { 2298 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2299 } 2300 2301 /** 2302 * Gets current zoom value. This also works when smooth zoom is in 2303 * progress. Applications should check {@link #isZoomSupported} before 2304 * using this method. 2305 * 2306 * @return the current zoom value. The range is 0 to {@link 2307 * #getMaxZoom}. 0 means the camera is not zoomed. 2308 */ 2309 public int getZoom() { 2310 return getInt(KEY_ZOOM, 0); 2311 } 2312 2313 /** 2314 * Sets current zoom value. If the camera is zoomed (value > 0), the 2315 * actual picture size may be smaller than picture size setting. 2316 * Applications can check the actual picture size after picture is 2317 * returned from {@link PictureCallback}. The preview size remains the 2318 * same in zoom. Applications should check {@link #isZoomSupported} 2319 * before using this method. 2320 * 2321 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2322 */ 2323 public void setZoom(int value) { 2324 set(KEY_ZOOM, value); 2325 } 2326 2327 /** 2328 * Returns true if zoom is supported. Applications should call this 2329 * before using other zoom methods. 2330 * 2331 * @return true if zoom is supported. 2332 */ 2333 public boolean isZoomSupported() { 2334 String str = get(KEY_ZOOM_SUPPORTED); 2335 return TRUE.equals(str); 2336 } 2337 2338 /** 2339 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2340 * value that applications can set to {@link #setZoom(int)}. 2341 * Applications should call {@link #isZoomSupported} before using this 2342 * method. This value may change in different preview size. Applications 2343 * should call this again after setting preview size. 2344 * 2345 * @return the maximum zoom value supported by the camera. 2346 */ 2347 public int getMaxZoom() { 2348 return getInt(KEY_MAX_ZOOM, 0); 2349 } 2350 2351 /** 2352 * Gets the zoom ratios of all zoom values. Applications should check 2353 * {@link #isZoomSupported} before using this method. 2354 * 2355 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2356 * returned as 320. The number of elements is {@link 2357 * #getMaxZoom} + 1. The list is sorted from small to large. The 2358 * first element is always 100. The last element is the zoom 2359 * ratio of the maximum zoom value. 2360 */ 2361 public List<Integer> getZoomRatios() { 2362 return splitInt(get(KEY_ZOOM_RATIOS)); 2363 } 2364 2365 /** 2366 * Returns true if smooth zoom is supported. Applications should call 2367 * this before using other smooth zoom methods. 2368 * 2369 * @return true if smooth zoom is supported. 2370 */ 2371 public boolean isSmoothZoomSupported() { 2372 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 2373 return TRUE.equals(str); 2374 } 2375 2376 /** 2377 * Gets the distances from the camera to where an object appears to be 2378 * in focus. The object is sharpest at the optimal focus distance. The 2379 * depth of field is the far focus distance minus near focus distance. 2380 * 2381 * Focus distances may change after calling {@link 2382 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 2383 * #startPreview()}. Applications can call {@link #getParameters()} 2384 * and this method anytime to get the latest focus distances. If the 2385 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 2386 * from time to time. 2387 * 2388 * This method is intended to estimate the distance between the camera 2389 * and the subject. After autofocus, the subject distance may be within 2390 * near and far focus distance. However, the precision depends on the 2391 * camera hardware, autofocus algorithm, the focus area, and the scene. 2392 * The error can be large and it should be only used as a reference. 2393 * 2394 * Far focus distance >= optimal focus distance >= near focus distance. 2395 * If the focus distance is infinity, the value will be 2396 * Float.POSITIVE_INFINITY. 2397 * 2398 * @param output focus distances in meters. output must be a float 2399 * array with three elements. Near focus distance, optimal focus 2400 * distance, and far focus distance will be filled in the array. 2401 * @see #FOCUS_DISTANCE_NEAR_INDEX 2402 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 2403 * @see #FOCUS_DISTANCE_FAR_INDEX 2404 */ 2405 public void getFocusDistances(float[] output) { 2406 if (output == null || output.length != 3) { 2407 throw new IllegalArgumentException( 2408 "output must be an float array with three elements."); 2409 } 2410 splitFloat(get(KEY_FOCUS_DISTANCES), output); 2411 } 2412 2413 // Splits a comma delimited string to an ArrayList of String. 2414 // Return null if the passing string is null or the size is 0. 2415 private ArrayList<String> split(String str) { 2416 if (str == null) return null; 2417 2418 // Use StringTokenizer because it is faster than split. 2419 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2420 ArrayList<String> substrings = new ArrayList<String>(); 2421 while (tokenizer.hasMoreElements()) { 2422 substrings.add(tokenizer.nextToken()); 2423 } 2424 return substrings; 2425 } 2426 2427 // Splits a comma delimited string to an ArrayList of Integer. 2428 // Return null if the passing string is null or the size is 0. 2429 private ArrayList<Integer> splitInt(String str) { 2430 if (str == null) return null; 2431 2432 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2433 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2434 while (tokenizer.hasMoreElements()) { 2435 String token = tokenizer.nextToken(); 2436 substrings.add(Integer.parseInt(token)); 2437 } 2438 if (substrings.size() == 0) return null; 2439 return substrings; 2440 } 2441 2442 private void splitInt(String str, int[] output) { 2443 if (str == null) return; 2444 2445 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2446 int index = 0; 2447 while (tokenizer.hasMoreElements()) { 2448 String token = tokenizer.nextToken(); 2449 output[index++] = Integer.parseInt(token); 2450 } 2451 } 2452 2453 // Splits a comma delimited string to an ArrayList of Float. 2454 private void splitFloat(String str, float[] output) { 2455 if (str == null) return; 2456 2457 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2458 int index = 0; 2459 while (tokenizer.hasMoreElements()) { 2460 String token = tokenizer.nextToken(); 2461 output[index++] = Float.parseFloat(token); 2462 } 2463 } 2464 2465 // Returns the value of a float parameter. 2466 private float getFloat(String key, float defaultValue) { 2467 try { 2468 return Float.parseFloat(mMap.get(key)); 2469 } catch (NumberFormatException ex) { 2470 return defaultValue; 2471 } 2472 } 2473 2474 // Returns the value of a integer parameter. 2475 private int getInt(String key, int defaultValue) { 2476 try { 2477 return Integer.parseInt(mMap.get(key)); 2478 } catch (NumberFormatException ex) { 2479 return defaultValue; 2480 } 2481 } 2482 2483 // Splits a comma delimited string to an ArrayList of Size. 2484 // Return null if the passing string is null or the size is 0. 2485 private ArrayList<Size> splitSize(String str) { 2486 if (str == null) return null; 2487 2488 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2489 ArrayList<Size> sizeList = new ArrayList<Size>(); 2490 while (tokenizer.hasMoreElements()) { 2491 Size size = strToSize(tokenizer.nextToken()); 2492 if (size != null) sizeList.add(size); 2493 } 2494 if (sizeList.size() == 0) return null; 2495 return sizeList; 2496 } 2497 2498 // Parses a string (ex: "480x320") to Size object. 2499 // Return null if the passing string is null. 2500 private Size strToSize(String str) { 2501 if (str == null) return null; 2502 2503 int pos = str.indexOf('x'); 2504 if (pos != -1) { 2505 String width = str.substring(0, pos); 2506 String height = str.substring(pos + 1); 2507 return new Size(Integer.parseInt(width), 2508 Integer.parseInt(height)); 2509 } 2510 Log.e(TAG, "Invalid size parameter string=" + str); 2511 return null; 2512 } 2513 2514 // Splits a comma delimited string to an ArrayList of int array. 2515 // Example string: "(10000,26623),(10000,30000)". Return null if the 2516 // passing string is null or the size is 0. 2517 private ArrayList<int[]> splitRange(String str) { 2518 if (str == null || str.charAt(0) != '(' 2519 || str.charAt(str.length() - 1) != ')') { 2520 Log.e(TAG, "Invalid range list string=" + str); 2521 return null; 2522 } 2523 2524 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 2525 int endIndex, fromIndex = 1; 2526 do { 2527 int[] range = new int[2]; 2528 endIndex = str.indexOf("),(", fromIndex); 2529 if (endIndex == -1) endIndex = str.length() - 1; 2530 splitInt(str.substring(fromIndex, endIndex), range); 2531 rangeList.add(range); 2532 fromIndex = endIndex + 3; 2533 } while (endIndex != str.length() - 1); 2534 2535 if (rangeList.size() == 0) return null; 2536 return rangeList; 2537 } 2538 }; 2539} 2540