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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.hardware;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.StringTokenizer;
import java.io.IOException;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.graphics.ImageFormat;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
/**
* The Camera class is used to set image capture settings, start/stop preview,
* snap pictures, and retrieve frames for encoding for video. This class is a
* client for the Camera service, which manages the actual camera hardware.
*
* <p>To access the device camera, you must declare the
* {@link android.Manifest.permission#CAMERA} permission in your Android
* Manifest. Also be sure to include the
* <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a>
* manifest element to declare camera features used by your application.
* For example, if you use the camera and auto-focus feature, your Manifest
* should include the following:</p>
* <pre> <uses-permission android:name="android.permission.CAMERA" />
* <uses-feature android:name="android.hardware.camera" />
* <uses-feature android:name="android.hardware.camera.autofocus" /></pre>
*
* <p>To take pictures with this class, use the following steps:</p>
*
* <ol>
* <li>Obtain an instance of Camera from {@link #open(int)}.
*
* <li>Get existing (default) settings with {@link #getParameters()}.
*
* <li>If necessary, modify the returned {@link Camera.Parameters} object and call
* {@link #setParameters(Camera.Parameters)}.
*
* <li>If desired, call {@link #setDisplayOrientation(int)}.
*
* <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to
* {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera
* will be unable to start the preview.
*
* <li><b>Important</b>: Call {@link #startPreview()} to start updating the
* preview surface. Preview must be started before you can take a picture.
*
* <li>When you want, call {@link #takePicture(Camera.ShutterCallback,
* Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to
* capture a photo. Wait for the callbacks to provide the actual image data.
*
* <li>After taking a picture, preview display will have stopped. To take more
* photos, call {@link #startPreview()} again first.
*
* <li>Call {@link #stopPreview()} to stop updating the preview surface.
*
* <li><b>Important:</b> Call {@link #release()} to release the camera for
* use by other applications. Applications should release the camera
* immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()}
* it in {@link android.app.Activity#onResume()}).
* </ol>
*
* <p>To quickly switch to video recording mode, use these steps:</p>
*
* <ol>
* <li>Obtain and initialize a Camera and start preview as described above.
*
* <li>Call {@link #unlock()} to allow the media process to access the camera.
*
* <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}.
* See {@link android.media.MediaRecorder} information about video recording.
*
* <li>When finished recording, call {@link #reconnect()} to re-acquire
* and re-lock the camera.
*
* <li>If desired, restart preview and take more photos or videos.
*
* <li>Call {@link #stopPreview()} and {@link #release()} as described above.
* </ol>
*
* <p>This class is not thread-safe, and is meant for use from one event thread.
* Most long-running operations (preview, focus, photo capture, etc) happen
* asynchronously and invoke callbacks as necessary. Callbacks will be invoked
* on the event thread {@link #open(int)} was called from. This class's methods
* must never be called from multiple threads at once.</p>
*
* <p class="caution"><strong>Caution:</strong> Different Android-powered devices
* may have different hardware specifications, such as megapixel ratings and
* auto-focus capabilities. In order for your application to be compatible with
* more devices, you should not make assumptions about the device camera
* specifications.</p>
*/
public class Camera {
private static final String TAG = "Camera";
// These match the enums in frameworks/base/include/camera/Camera.h
private static final int CAMERA_MSG_ERROR = 0x001;
private static final int CAMERA_MSG_SHUTTER = 0x002;
private static final int CAMERA_MSG_FOCUS = 0x004;
private static final int CAMERA_MSG_ZOOM = 0x008;
private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010;
private static final int CAMERA_MSG_VIDEO_FRAME = 0x020;
private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040;
private static final int CAMERA_MSG_RAW_IMAGE = 0x080;
private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100;
private static final int CAMERA_MSG_ALL_MSGS = 0x1FF;
private int mNativeContext; // accessed by native methods
private EventHandler mEventHandler;
private ShutterCallback mShutterCallback;
private PictureCallback mRawImageCallback;
private PictureCallback mJpegCallback;
private PreviewCallback mPreviewCallback;
private PictureCallback mPostviewCallback;
private AutoFocusCallback mAutoFocusCallback;
private OnZoomChangeListener mZoomListener;
private ErrorCallback mErrorCallback;
private boolean mOneShot;
private boolean mWithBuffer;
/**
* Returns the number of physical cameras available on this device.
*/
public native static int getNumberOfCameras();
/**
* Returns the information about a particular camera.
* If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1.
*/
public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo);
/**
* Information about a camera
*/
public static class CameraInfo {
/**
* The facing of the camera is opposite to that of the screen.
*/
public static final int CAMERA_FACING_BACK = 0;
/**
* The facing of the camera is the same as that of the screen.
*/
public static final int CAMERA_FACING_FRONT = 1;
/**
* The direction that the camera faces to. It should be
* CAMERA_FACING_BACK or CAMERA_FACING_FRONT.
*/
public int facing;
/**
* The orientation of the camera image. The value is the angle that the
* camera image needs to be rotated clockwise so it shows correctly on
* the display in its natural orientation. It should be 0, 90, 180, or 270.
*
* For example, suppose a device has a naturally tall screen. The
* back-facing camera sensor is mounted in landscape. You are looking at
* the screen. If the top side of the camera sensor is aligned with the
* right edge of the screen in natural orientation, the value should be
* 90. If the top side of a front-facing camera sensor is aligned with
* the right of the screen, the value should be 270.
*
* @see #setDisplayOrientation(int)
* @see Parameters#setRotation(int)
* @see Parameters#setPreviewSize(int, int)
* @see Parameters#setPictureSize(int, int)
* @see Parameters#setJpegThumbnailSize(int, int)
*/
public int orientation;
};
/**
* Creates a new Camera object to access a particular hardware camera.
*
* <p>You must call {@link #release()} when you are done using the camera,
* otherwise it will remain locked and be unavailable to other applications.
*
* <p>Your application should only have one Camera object active at a time
* for a particular hardware camera.
*
* <p>Callbacks from other methods are delivered to the event loop of the
* thread which called open(). If this thread has no event loop, then
* callbacks are delivered to the main application event loop. If there
* is no main application event loop, callbacks are not delivered.
*
* <p class="caution"><b>Caution:</b> On some devices, this method may
* take a long time to complete. It is best to call this method from a
* worker thread (possibly using {@link android.os.AsyncTask}) to avoid
* blocking the main application UI thread.
*
* @param cameraId the hardware camera to access, between 0 and
* {@link #getNumberOfCameras()}-1.
* @return a new Camera object, connected, locked and ready for use.
* @throws RuntimeException if connection to the camera service fails (for
* example, if the camera is in use by another process).
*/
public static Camera open(int cameraId) {
return new Camera(cameraId);
}
/**
* Creates a new Camera object to access the first back-facing camera on the
* device. If the device does not have a back-facing camera, this returns
* null.
* @see #open(int)
*/
public static Camera open() {
int numberOfCameras = getNumberOfCameras();
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < numberOfCameras; i++) {
getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
return new Camera(i);
}
}
return null;
}
Camera(int cameraId) {
mShutterCallback = null;
mRawImageCallback = null;
mJpegCallback = null;
mPreviewCallback = null;
mPostviewCallback = null;
mZoomListener = null;
Looper looper;
if ((looper = Looper.myLooper()) != null) {
mEventHandler = new EventHandler(this, looper);
} else if ((looper = Looper.getMainLooper()) != null) {
mEventHandler = new EventHandler(this, looper);
} else {
mEventHandler = null;
}
native_setup(new WeakReference<Camera>(this), cameraId);
}
protected void finalize() {
native_release();
}
private native final void native_setup(Object camera_this, int cameraId);
private native final void native_release();
/**
* Disconnects and releases the Camera object resources.
*
* <p>You must call this as soon as you're done with the Camera object.</p>
*/
public final void release() {
native_release();
}
/**
* Unlocks the camera to allow another process to access it.
* Normally, the camera is locked to the process with an active Camera
* object until {@link #release()} is called. To allow rapid handoff
* between processes, you can call this method to release the camera
* temporarily for another process to use; once the other process is done
* you can call {@link #reconnect()} to reclaim the camera.
*
* <p>This must be done before calling
* {@link android.media.MediaRecorder#setCamera(Camera)}.
*
* <p>If you are not recording video, you probably do not need this method.
*
* @throws RuntimeException if the camera cannot be unlocked.
*/
public native final void unlock();
/**
* Re-locks the camera to prevent other processes from accessing it.
* Camera objects are locked by default unless {@link #unlock()} is
* called. Normally {@link #reconnect()} is used instead.
*
* <p>If you are not recording video, you probably do not need this method.
*
* @throws RuntimeException if the camera cannot be re-locked (for
* example, if the camera is still in use by another process).
*/
public native final void lock();
/**
* Reconnects to the camera service after another process used it.
* After {@link #unlock()} is called, another process may use the
* camera; when the process is done, you must reconnect to the camera,
* which will re-acquire the lock and allow you to continue using the
* camera.
*
* <p>This must be done after {@link android.media.MediaRecorder} is
* done recording if {@link android.media.MediaRecorder#setCamera(Camera)}
* was used.
*
* <p>If you are not recording video, you probably do not need this method.
*
* @throws IOException if a connection cannot be re-established (for
* example, if the camera is still in use by another process).
*/
public native final void reconnect() throws IOException;
/**
* Sets the {@link Surface} to be used for live preview.
* A surface is necessary for preview, and preview is necessary to take
* pictures. The same surface can be re-set without harm.
*
* <p>The {@link SurfaceHolder} must already contain a surface when this
* method is called. If you are using {@link android.view.SurfaceView},
* you will need to register a {@link SurfaceHolder.Callback} with
* {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for
* {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before
* calling setPreviewDisplay() or starting preview.
*
* <p>This method must be called before {@link #startPreview()}. The
* one exception is that if the preview surface is not set (or set to null)
* before startPreview() is called, then this method may be called once
* with a non-null parameter to set the preview surface. (This allows
* camera setup and surface creation to happen in parallel, saving time.)
* The preview surface may not otherwise change while preview is running.
*
* @param holder containing the Surface on which to place the preview,
* or null to remove the preview surface
* @throws IOException if the method fails (for example, if the surface
* is unavailable or unsuitable).
*/
public final void setPreviewDisplay(SurfaceHolder holder) throws IOException {
if (holder != null) {
setPreviewDisplay(holder.getSurface());
} else {
setPreviewDisplay((Surface)null);
}
}
private native final void setPreviewDisplay(Surface surface);
/**
* Callback interface used to deliver copies of preview frames as
* they are displayed.
*
* @see #setPreviewCallback(Camera.PreviewCallback)
* @see #setOneShotPreviewCallback(Camera.PreviewCallback)
* @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback)
* @see #startPreview()
*/
public interface PreviewCallback
{
/**
* Called as preview frames are displayed. This callback is invoked
* on the event thread {@link #open(int)} was called from.
*
* @param data the contents of the preview frame in the format defined
* by {@link android.graphics.ImageFormat}, which can be queried
* with {@link android.hardware.Camera.Parameters#getPreviewFormat()}.
* If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)}
* is never called, the default will be the YCbCr_420_SP
* (NV21) format.
* @param camera the Camera service object.
*/
void onPreviewFrame(byte[] data, Camera camera);
};
/**
* Starts capturing and drawing preview frames to the screen.
* Preview will not actually start until a surface is supplied with
* {@link #setPreviewDisplay(SurfaceHolder)}.
*
* <p>If {@link #setPreviewCallback(Camera.PreviewCallback)},
* {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or
* {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were
* called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)}
* will be called when preview data becomes available.
*/
public native final void startPreview();
/**
* Stops capturing and drawing preview frames to the surface, and
* resets the camera for a future call to {@link #startPreview()}.
*/
public native final void stopPreview();
/**
* Return current preview state.
*
* FIXME: Unhide before release
* @hide
*/
public native final boolean previewEnabled();
/**
* Installs a callback to be invoked for every preview frame in addition
* to displaying them on the screen. The callback will be repeatedly called
* for as long as preview is active. This method can be called at any time,
* even while preview is live. Any other preview callbacks are overridden.
*
* @param cb a callback object that receives a copy of each preview frame,
* or null to stop receiving callbacks.
*/
public final void setPreviewCallback(PreviewCallback cb) {
mPreviewCallback = cb;
mOneShot = false;
mWithBuffer = false;
// Always use one-shot mode. We fake camera preview mode by
// doing one-shot preview continuously.
setHasPreviewCallback(cb != null, false);
}
/**
* Installs a callback to be invoked for the next preview frame in addition
* to displaying it on the screen. After one invocation, the callback is
* cleared. This method can be called any time, even when preview is live.
* Any other preview callbacks are overridden.
*
* @param cb a callback object that receives a copy of the next preview frame,
* or null to stop receiving callbacks.
*/
public final void setOneShotPreviewCallback(PreviewCallback cb) {
mPreviewCallback = cb;
mOneShot = true;
mWithBuffer = false;
setHasPreviewCallback(cb != null, false);
}
private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer);
/**
* Installs a callback to be invoked for every preview frame, using buffers
* supplied with {@link #addCallbackBuffer(byte[])}, in addition to
* displaying them on the screen. The callback will be repeatedly called
* for as long as preview is active and buffers are available.
* Any other preview callbacks are overridden.
*
* <p>The purpose of this method is to improve preview efficiency and frame
* rate by allowing preview frame memory reuse. You must call
* {@link #addCallbackBuffer(byte[])} at some point -- before or after
* calling this method -- or no callbacks will received.
*
* The buffer queue will be cleared if this method is called with a null
* callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called,
* or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called.
*
* @param cb a callback object that receives a copy of the preview frame,
* or null to stop receiving callbacks and clear the buffer queue.
* @see #addCallbackBuffer(byte[])
*/
public final void setPreviewCallbackWithBuffer(PreviewCallback cb) {
mPreviewCallback = cb;
mOneShot = false;
mWithBuffer = true;
setHasPreviewCallback(cb != null, true);
}
/**
* Adds a pre-allocated buffer to the preview callback buffer queue.
* Applications can add one or more buffers to the queue. When a preview
* frame arrives and there is still at least one available buffer, the
* buffer will be used and removed from the queue. Then preview callback is
* invoked with the buffer. If a frame arrives and there is no buffer left,
* the frame is discarded. Applications should add buffers back when they
* finish processing the data in them.
*
* <p>The size of the buffer is determined by multiplying the preview
* image width, height, and bytes per pixel. The width and height can be
* read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel
* can be computed from
* {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8,
* using the image format from {@link Camera.Parameters#getPreviewFormat()}.
*
* <p>This method is only necessary when
* {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When
* {@link #setPreviewCallback(PreviewCallback)} or
* {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers
* are automatically allocated.
*
* @param callbackBuffer the buffer to add to the queue.
* The size should be width * height * bits_per_pixel / 8.
* @see #setPreviewCallbackWithBuffer(PreviewCallback)
*/
public native final void addCallbackBuffer(byte[] callbackBuffer);
private class EventHandler extends Handler
{
private Camera mCamera;
public EventHandler(Camera c, Looper looper) {
super(looper);
mCamera = c;
}
@Override
public void handleMessage(Message msg) {
switch(msg.what) {
case CAMERA_MSG_SHUTTER:
if (mShutterCallback != null) {
mShutterCallback.onShutter();
}
return;
case CAMERA_MSG_RAW_IMAGE:
if (mRawImageCallback != null) {
mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_COMPRESSED_IMAGE:
if (mJpegCallback != null) {
mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_PREVIEW_FRAME:
if (mPreviewCallback != null) {
PreviewCallback cb = mPreviewCallback;
if (mOneShot) {
// Clear the callback variable before the callback
// in case the app calls setPreviewCallback from
// the callback function
mPreviewCallback = null;
} else if (!mWithBuffer) {
// We're faking the camera preview mode to prevent
// the app from being flooded with preview frames.
// Set to oneshot mode again.
setHasPreviewCallback(true, false);
}
cb.onPreviewFrame((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_POSTVIEW_FRAME:
if (mPostviewCallback != null) {
mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_FOCUS:
if (mAutoFocusCallback != null) {
mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera);
}
return;
case CAMERA_MSG_ZOOM:
if (mZoomListener != null) {
mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera);
}
return;
case CAMERA_MSG_ERROR :
Log.e(TAG, "Error " + msg.arg1);
if (mErrorCallback != null) {
mErrorCallback.onError(msg.arg1, mCamera);
}
return;
default:
Log.e(TAG, "Unknown message type " + msg.what);
return;
}
}
}
private static void postEventFromNative(Object camera_ref,
int what, int arg1, int arg2, Object obj)
{
Camera c = (Camera)((WeakReference)camera_ref).get();
if (c == null)
return;
if (c.mEventHandler != null) {
Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj);
c.mEventHandler.sendMessage(m);
}
}
/**
* Callback interface used to notify on completion of camera auto focus.
*
* <p>Devices that do not support auto-focus will receive a "fake"
* callback to this interface. If your application needs auto-focus and
* should not be installed on devices <em>without</em> auto-focus, you must
* declare that your app uses the
* {@code android.hardware.camera.autofocus} feature, in the
* <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a>
* manifest element.</p>
*
* @see #autoFocus(AutoFocusCallback)
*/
public interface AutoFocusCallback
{
/**
* Called when the camera auto focus completes. If the camera
* does not support auto-focus and autoFocus is called,
* onAutoFocus will be called immediately with a fake value of
* <code>success</code> set to <code>true</code>.
*
* @param success true if focus was successful, false if otherwise
* @param camera the Camera service object
*/
void onAutoFocus(boolean success, Camera camera);
};
/**
* Starts camera auto-focus and registers a callback function to run when
* the camera is focused. This method is only valid when preview is active
* (between {@link #startPreview()} and before {@link #stopPreview()}).
*
* <p>Callers should check
* {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if
* this method should be called. If the camera does not support auto-focus,
* it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)}
* callback will be called immediately.
*
* <p>If your application should not be installed
* on devices without auto-focus, you must declare that your application
* uses auto-focus with the
* <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a>
* manifest element.</p>
*
* <p>If the current flash mode is not
* {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be
* fired during auto-focus, depending on the driver and camera hardware.<p>
*
* @param cb the callback to run
* @see #cancelAutoFocus()
*/
public final void autoFocus(AutoFocusCallback cb)
{
mAutoFocusCallback = cb;
native_autoFocus();
}
private native final void native_autoFocus();
/**
* Cancels any auto-focus function in progress.
* Whether or not auto-focus is currently in progress,
* this function will return the focus position to the default.
* If the camera does not support auto-focus, this is a no-op.
*
* @see #autoFocus(Camera.AutoFocusCallback)
*/
public final void cancelAutoFocus()
{
mAutoFocusCallback = null;
native_cancelAutoFocus();
}
private native final void native_cancelAutoFocus();
/**
* Callback interface used to signal the moment of actual image capture.
*
* @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
*/
public interface ShutterCallback
{
/**
* Called as near as possible to the moment when a photo is captured
* from the sensor. This is a good opportunity to play a shutter sound
* or give other feedback of camera operation. This may be some time
* after the photo was triggered, but some time before the actual data
* is available.
*/
void onShutter();
}
/**
* Callback interface used to supply image data from a photo capture.
*
* @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
*/
public interface PictureCallback {
/**
* Called when image data is available after a picture is taken.
* The format of the data depends on the context of the callback
* and {@link Camera.Parameters} settings.
*
* @param data a byte array of the picture data
* @param camera the Camera service object
*/
void onPictureTaken(byte[] data, Camera camera);
};
/**
* Equivalent to takePicture(shutter, raw, null, jpeg).
*
* @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
*/
public final void takePicture(ShutterCallback shutter, PictureCallback raw,
PictureCallback jpeg) {
takePicture(shutter, raw, null, jpeg);
}
private native final void native_takePicture();
/**
* Triggers an asynchronous image capture. The camera service will initiate
* a series of callbacks to the application as the image capture progresses.
* The shutter callback occurs after the image is captured. This can be used
* to trigger a sound to let the user know that image has been captured. The
* raw callback occurs when the raw image data is available (NOTE: the data
* may be null if the hardware does not have enough memory to make a copy).
* The postview callback occurs when a scaled, fully processed postview
* image is available (NOTE: not all hardware supports this). The jpeg
* callback occurs when the compressed image is available. If the
* application does not need a particular callback, a null can be passed
* instead of a callback method.
*
* <p>This method is only valid when preview is active (after
* {@link #startPreview()}). Preview will be stopped after the image is
* taken; callers must call {@link #startPreview()} again if they want to
* re-start preview or take more pictures.
*
* <p>After calling this method, you must not call {@link #startPreview()}
* or take another picture until the JPEG callback has returned.
*
* @param shutter the callback for image capture moment, or null
* @param raw the callback for raw (uncompressed) image data, or null
* @param postview callback with postview image data, may be null
* @param jpeg the callback for JPEG image data, or null
*/
public final void takePicture(ShutterCallback shutter, PictureCallback raw,
PictureCallback postview, PictureCallback jpeg) {
mShutterCallback = shutter;
mRawImageCallback = raw;
mPostviewCallback = postview;
mJpegCallback = jpeg;
native_takePicture();
}
/**
* Zooms to the requested value smoothly. The driver will notify {@link
* OnZoomChangeListener} of the zoom value and whether zoom is stopped at
* the time. For example, suppose the current zoom is 0 and startSmoothZoom
* is called with value 3. The
* {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)}
* method will be called three times with zoom values 1, 2, and 3.
* Applications can call {@link #stopSmoothZoom} to stop the zoom earlier.
* Applications should not call startSmoothZoom again or change the zoom
* value before zoom stops. If the supplied zoom value equals to the current
* zoom value, no zoom callback will be generated. This method is supported
* if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported}
* returns true.
*
* @param value zoom value. The valid range is 0 to {@link
* android.hardware.Camera.Parameters#getMaxZoom}.
* @throws IllegalArgumentException if the zoom value is invalid.
* @throws RuntimeException if the method fails.
* @see #setZoomChangeListener(OnZoomChangeListener)
*/
public native final void startSmoothZoom(int value);
/**
* Stops the smooth zoom. Applications should wait for the {@link
* OnZoomChangeListener} to know when the zoom is actually stopped. This
* method is supported if {@link
* android.hardware.Camera.Parameters#isSmoothZoomSupported} is true.
*
* @throws RuntimeException if the method fails.
*/
public native final void stopSmoothZoom();
/**
* Set the clockwise rotation of preview display in degrees. This affects
* the preview frames and the picture displayed after snapshot. This method
* is useful for portrait mode applications. Note that preview display of
* front-facing cameras is flipped horizontally before the rotation, that
* is, the image is reflected along the central vertical axis of the camera
* sensor. So the users can see themselves as looking into a mirror.
*
* <p>This does not affect the order of byte array passed in {@link
* PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This
* method is not allowed to be called during preview.
*
* <p>If you want to make the camera image show in the same orientation as
* the display, you can use the following code.
* <pre>
* public static void setCameraDisplayOrientation(Activity activity,
* int cameraId, android.hardware.Camera camera) {
* android.hardware.Camera.CameraInfo info =
* new android.hardware.Camera.CameraInfo();
* android.hardware.Camera.getCameraInfo(cameraId, info);
* int rotation = activity.getWindowManager().getDefaultDisplay()
* .getRotation();
* int degrees = 0;
* switch (rotation) {
* case Surface.ROTATION_0: degrees = 0; break;
* case Surface.ROTATION_90: degrees = 90; break;
* case Surface.ROTATION_180: degrees = 180; break;
* case Surface.ROTATION_270: degrees = 270; break;
* }
*
* int result;
* if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
* result = (info.orientation + degrees) % 360;
* result = (360 - result) % 360; // compensate the mirror
* } else { // back-facing
* result = (info.orientation - degrees + 360) % 360;
* }
* camera.setDisplayOrientation(result);
* }
* </pre>
* @param degrees the angle that the picture will be rotated clockwise.
* Valid values are 0, 90, 180, and 270. The starting
* position is 0 (landscape).
* @see #setPreviewDisplay(SurfaceHolder)
*/
public native final void setDisplayOrientation(int degrees);
//0830zhao if type is 4: setTakepicFrequencyAndNum
public native final void setCustomerArg1AndArg2(int type,int arg1,int arg2);
/**
* Callback interface for zoom changes during a smooth zoom operation.
*
* @see #setZoomChangeListener(OnZoomChangeListener)
* @see #startSmoothZoom(int)
*/
public interface OnZoomChangeListener
{
/**
* Called when the zoom value has changed during a smooth zoom.
*
* @param zoomValue the current zoom value. In smooth zoom mode, camera
* calls this for every new zoom value.
* @param stopped whether smooth zoom is stopped. If the value is true,
* this is the last zoom update for the application.
* @param camera the Camera service object
*/
void onZoomChange(int zoomValue, boolean stopped, Camera camera);
};
/**
* Registers a listener to be notified when the zoom value is updated by the
* camera driver during smooth zoom.
*
* @param listener the listener to notify
* @see #startSmoothZoom(int)
*/
public final void setZoomChangeListener(OnZoomChangeListener listener)
{
mZoomListener = listener;
}
// Error codes match the enum in include/ui/Camera.h
/**
* Unspecified camera error.
* @see Camera.ErrorCallback
*/
public static final int CAMERA_ERROR_UNKNOWN = 1;
/**
* Media server died. In this case, the application must release the
* Camera object and instantiate a new one.
* @see Camera.ErrorCallback
*/
public static final int CAMERA_ERROR_SERVER_DIED = 100;
/**
* Callback interface for camera error notification.
*
* @see #setErrorCallback(ErrorCallback)
*/
public interface ErrorCallback
{
/**
* Callback for camera errors.
* @param error error code:
* <ul>
* <li>{@link #CAMERA_ERROR_UNKNOWN}
* <li>{@link #CAMERA_ERROR_SERVER_DIED}
* </ul>
* @param camera the Camera service object
*/
void onError(int error, Camera camera);
};
/**
* Registers a callback to be invoked when an error occurs.
* @param cb The callback to run
*/
public final void setErrorCallback(ErrorCallback cb)
{
mErrorCallback = cb;
}
private native final void native_setParameters(String params);
private native final String native_getParameters();
/**
* Changes the settings for this Camera service.
*
* @param params the Parameters to use for this Camera service
* @throws RuntimeException if any parameter is invalid or not supported.
* @see #getParameters()
*/
public void setParameters(Parameters params) {
native_setParameters(params.flatten());
}
/**
* Returns the current settings for this Camera service.
* If modifications are made to the returned Parameters, they must be passed
* to {@link #setParameters(Camera.Parameters)} to take effect.
*
* @see #setParameters(Camera.Parameters)
*/
public Parameters getParameters() {
Parameters p = new Parameters();
String s = native_getParameters();
p.unflatten(s);
return p;
}
/**
* Image size (width and height dimensions).
*/
public class Size {
/**
* Sets the dimensions for pictures.
*
* @param w the photo width (pixels)
* @param h the photo height (pixels)
*/
public Size(int w, int h) {
width = w;
height = h;
}
/**
* Compares {@code obj} to this size.
*
* @param obj the object to compare this size with.
* @return {@code true} if the width and height of {@code obj} is the
* same as those of this size. {@code false} otherwise.
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof Size)) {
return false;
}
Size s = (Size) obj;
return width == s.width && height == s.height;
}
@Override
public int hashCode() {
return width * 32713 + height;
}
/** width of the picture */
public int width;
/** height of the picture */
public int height;
};
/**
* Camera service settings.
*
* <p>To make camera parameters take effect, applications have to call
* {@link Camera#setParameters(Camera.Parameters)}. For example, after
* {@link Camera.Parameters#setWhiteBalance} is called, white balance is not
* actually changed until {@link Camera#setParameters(Camera.Parameters)}
* is called with the changed parameters object.
*
* <p>Different devices may have different camera capabilities, such as
* picture size or flash modes. The application should query the camera
* capabilities before setting parameters. For example, the application
* should call {@link Camera.Parameters#getSupportedColorEffects()} before
* calling {@link Camera.Parameters#setColorEffect(String)}. If the
* camera does not support color effects,
* {@link Camera.Parameters#getSupportedColorEffects()} will return null.
*/
public class Parameters {
// Parameter keys to communicate with the camera driver.
private static final String KEY_PREVIEW_SIZE = "preview-size";
private static final String KEY_PREVIEW_FORMAT = "preview-format";
private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate";
private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range";
private static final String KEY_PICTURE_SIZE = "picture-size";
private static final String KEY_PICTURE_FORMAT = "picture-format";
private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size";
private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width";
private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height";
private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality";
private static final String KEY_JPEG_QUALITY = "jpeg-quality";
private static final String KEY_ROTATION = "rotation";
private static final String KEY_GPS_LATITUDE = "gps-latitude";
private static final String KEY_GPS_LONGITUDE = "gps-longitude";
private static final String KEY_GPS_ALTITUDE = "gps-altitude";
private static final String KEY_GPS_TIMESTAMP = "gps-timestamp";
private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method";
private static final String KEY_WHITE_BALANCE = "whitebalance";
private static final String KEY_EFFECT = "effect";
private static final String KEY_ANTIBANDING = "antibanding";
private static final String KEY_SCENE_MODE = "scene-mode";
private static final String KEY_FLASH_MODE = "flash-mode";
private static final String KEY_FOCUS_MODE = "focus-mode";
private static final String KEY_FOCAL_LENGTH = "focal-length";
private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle";
private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle";
private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation";
private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation";
private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation";
private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step";
private static final String KEY_ZOOM = "zoom";
private static final String KEY_MAX_ZOOM = "max-zoom";
private static final String KEY_ZOOM_RATIOS = "zoom-ratios";
private static final String KEY_ZOOM_SUPPORTED = "zoom-supported";
private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported";
private static final String KEY_FOCUS_DISTANCES = "focus-distances";
// Parameter key suffix for supported values.
private static final String SUPPORTED_VALUES_SUFFIX = "-values";
private static final String TRUE = "true";
// Values for white balance settings.
public static final String WHITE_BALANCE_AUTO = "auto";
public static final String WHITE_BALANCE_INCANDESCENT = "incandescent";
public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent";
public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent";
public static final String WHITE_BALANCE_DAYLIGHT = "daylight";
public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight";
public static final String WHITE_BALANCE_TWILIGHT = "twilight";
public static final String WHITE_BALANCE_SHADE = "shade";
// Values for color effect settings.
public static final String EFFECT_NONE = "none";
public static final String EFFECT_MONO = "mono";
public static final String EFFECT_NEGATIVE = "negative";
public static final String EFFECT_SOLARIZE = "solarize";
public static final String EFFECT_SEPIA = "sepia";
public static final String EFFECT_POSTERIZE = "posterize";
public static final String EFFECT_WHITEBOARD = "whiteboard";
public static final String EFFECT_BLACKBOARD = "blackboard";
public static final String EFFECT_AQUA = "aqua";
// Values for antibanding settings.
public static final String ANTIBANDING_AUTO = "auto";
public static final String ANTIBANDING_50HZ = "50hz";
public static final String ANTIBANDING_60HZ = "60hz";
public static final String ANTIBANDING_OFF = "off";
// Values for flash mode settings.
/**
* Flash will not be fired.
*/
public static final String FLASH_MODE_OFF = "off";
/**
* Flash will be fired automatically when required. The flash may be fired
* during preview, auto-focus, or snapshot depending on the driver.
*/
public static final String FLASH_MODE_AUTO = "auto";
/**
* Flash will always be fired during snapshot. The flash may also be
* fired during preview or auto-focus depending on the driver.
*/
public static final String FLASH_MODE_ON = "on";
/**
* Flash will be fired in red-eye reduction mode.
*/
public static final String FLASH_MODE_RED_EYE = "red-eye";
/**
* Constant emission of light during preview, auto-focus and snapshot.
* This can also be used for video recording.
*/
public static final String FLASH_MODE_TORCH = "torch";
/**
* Scene mode is off.
*/
public static final String SCENE_MODE_AUTO = "auto";
/**
* Take photos of fast moving objects. Same as {@link
* #SCENE_MODE_SPORTS}.
*/
public static final String SCENE_MODE_ACTION = "action";
/**
* Take people pictures.
*/
public static final String SCENE_MODE_PORTRAIT = "portrait";
/**
* Take pictures on distant objects.
*/
public static final String SCENE_MODE_LANDSCAPE = "landscape";
/**
* Take photos at night.
*/
public static final String SCENE_MODE_NIGHT = "night";
/**
* Take people pictures at night.
*/
public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait";
/**
* Take photos in a theater. Flash light is off.
*/
public static final String SCENE_MODE_THEATRE = "theatre";
/**
* Take pictures on the beach.
*/
public static final String SCENE_MODE_BEACH = "beach";
/**
* Take pictures on the snow.
*/
public static final String SCENE_MODE_SNOW = "snow";
/**
* Take sunset photos.
*/
public static final String SCENE_MODE_SUNSET = "sunset";
/**
* Avoid blurry pictures (for example, due to hand shake).
*/
public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto";
/**
* For shooting firework displays.
*/
public static final String SCENE_MODE_FIREWORKS = "fireworks";
/**
* Take photos of fast moving objects. Same as {@link
* #SCENE_MODE_ACTION}.
*/
public static final String SCENE_MODE_SPORTS = "sports";
/**
* Take indoor low-light shot.
*/
public static final String SCENE_MODE_PARTY = "party";
/**
* Capture the naturally warm color of scenes lit by candles.
*/
public static final String SCENE_MODE_CANDLELIGHT = "candlelight";
/**
* Applications are looking for a barcode. Camera driver will be
* optimized for barcode reading.
*/
public static final String SCENE_MODE_BARCODE = "barcode";
/**
* Auto-focus mode. Applications should call {@link
* #autoFocus(AutoFocusCallback)} to start the focus in this mode.
*/
public static final String FOCUS_MODE_AUTO = "auto";
/**
* Focus is set at infinity. Applications should not call
* {@link #autoFocus(AutoFocusCallback)} in this mode.
*/
public static final String FOCUS_MODE_INFINITY = "infinity";
/**
* Macro (close-up) focus mode. Applications should call
* {@link #autoFocus(AutoFocusCallback)} to start the focus in this
* mode.
*/
public static final String FOCUS_MODE_MACRO = "macro";
/**
* Focus is fixed. The camera is always in this mode if the focus is not
* adjustable. If the camera has auto-focus, this mode can fix the
* focus, which is usually at hyperfocal distance. Applications should
* not call {@link #autoFocus(AutoFocusCallback)} in this mode.
*/
public static final String FOCUS_MODE_FIXED = "fixed";
/**
* Extended depth of field (EDOF). Focusing is done digitally and
* continuously. Applications should not call {@link
* #autoFocus(AutoFocusCallback)} in this mode.
*/
public static final String FOCUS_MODE_EDOF = "edof";
/**
* Continuous auto focus mode intended for video recording. The camera
* continuously tries to focus. This is ideal for shooting video.
* Applications still can call {@link
* #takePicture(Camera.ShutterCallback, Camera.PictureCallback,
* Camera.PictureCallback)} in this mode but the subject may not be in
* focus. Auto focus starts when the parameter is set. Applications
* should not call {@link #autoFocus(AutoFocusCallback)} in this mode.
* To stop continuous focus, applications should change the focus mode
* to other modes.
*/
public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video";
// Indices for focus distance array.
/**
* The array index of near focus distance for use with
* {@link #getFocusDistances(float[])}.
*/
public static final int FOCUS_DISTANCE_NEAR_INDEX = 0;
/**
* The array index of optimal focus distance for use with
* {@link #getFocusDistances(float[])}.
*/
public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1;
/**
* The array index of far focus distance for use with
* {@link #getFocusDistances(float[])}.
*/
public static final int FOCUS_DISTANCE_FAR_INDEX = 2;
/**
* The array index of minimum preview fps for use with {@link
* #getPreviewFpsRange(int[])} or {@link
* #getSupportedPreviewFpsRange()}.
*/
public static final int PREVIEW_FPS_MIN_INDEX = 0;
/**
* The array index of maximum preview fps for use with {@link
* #getPreviewFpsRange(int[])} or {@link
* #getSupportedPreviewFpsRange()}.
*/
public static final int PREVIEW_FPS_MAX_INDEX = 1;
// Formats for setPreviewFormat and setPictureFormat.
private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp";
private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp";
private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv";
private static final String PIXEL_FORMAT_RGB565 = "rgb565";
private static final String PIXEL_FORMAT_JPEG = "jpeg";
private HashMap<String, String> mMap;
private Parameters() {
mMap = new HashMap<String, String>();
}
/**
* Writes the current Parameters to the log.
* @hide
* @deprecated
*/
public void dump() {
Log.e(TAG, "dump: size=" + mMap.size());
for (String k : mMap.keySet()) {
Log.e(TAG, "dump: " + k + "=" + mMap.get(k));
}
}
/**
* Creates a single string with all the parameters set in
* this Parameters object.
* <p>The {@link #unflatten(String)} method does the reverse.</p>
*
* @return a String with all values from this Parameters object, in
* semi-colon delimited key-value pairs
*/
public String flatten() {
StringBuilder flattened = new StringBuilder();
for (String k : mMap.keySet()) {
flattened.append(k);
flattened.append("=");
flattened.append(mMap.get(k));
flattened.append(";");
}
// chop off the extra semicolon at the end
flattened.deleteCharAt(flattened.length()-1);
return flattened.toString();
}
/**
* Takes a flattened string of parameters and adds each one to
* this Parameters object.
* <p>The {@link #flatten()} method does the reverse.</p>
*
* @param flattened a String of parameters (key-value paired) that
* are semi-colon delimited
*/
public void unflatten(String flattened) {
mMap.clear();
StringTokenizer tokenizer = new StringTokenizer(flattened, ";");
while (tokenizer.hasMoreElements()) {
String kv = tokenizer.nextToken();
int pos = kv.indexOf('=');
if (pos == -1) {
continue;
}
String k = kv.substring(0, pos);
String v = kv.substring(pos + 1);
mMap.put(k, v);
}
}
public void remove(String key) {
mMap.remove(key);
}
/**
* Sets a String parameter.
*
* @param key the key name for the parameter
* @param value the String value of the parameter
*/
public void set(String key, String value) {
if (key.indexOf('=') != -1 || key.indexOf(';') != -1) {
Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)");
return;
}
if (value.indexOf('=') != -1 || value.indexOf(';') != -1) {
Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)");
return;
}
mMap.put(key, value);
}
/**
* Sets an integer parameter.
*
* @param key the key name for the parameter
* @param value the int value of the parameter
*/
public void set(String key, int value) {
mMap.put(key, Integer.toString(value));
}
/**
* Returns the value of a String parameter.
*
* @param key the key name for the parameter
* @return the String value of the parameter
*/
public String get(String key) {
return mMap.get(key);
}
/**
* Returns the value of an integer parameter.
*
* @param key the key name for the parameter
* @return the int value of the parameter
*/
public int getInt(String key) {
return Integer.parseInt(mMap.get(key));
}
/**
* Sets the dimensions for preview pictures.
*
* The sides of width and height are based on camera orientation. That
* is, the preview size is the size before it is rotated by display
* orientation. So applications need to consider the display orientation
* while setting preview size. For example, suppose the camera supports
* both 480x320 and 320x480 preview sizes. The application wants a 3:2
* preview ratio. If the display orientation is set to 0 or 180, preview
* size should be set to 480x320. If the display orientation is set to
* 90 or 270, preview size should be set to 320x480. The display
* orientation should also be considered while setting picture size and
* thumbnail size.
*
* @param width the width of the pictures, in pixels
* @param height the height of the pictures, in pixels
* @see #setDisplayOrientation(int)
* @see #getCameraInfo(int, CameraInfo)
* @see #setPictureSize(int, int)
* @see #setJpegThumbnailSize(int, int)
*/
public void setPreviewSize(int width, int height) {
String v = Integer.toString(width) + "x" + Integer.toString(height);
set(KEY_PREVIEW_SIZE, v);
}
/**
* Returns the dimensions setting for preview pictures.
*
* @return a Size object with the height and width setting
* for the preview picture
*/
public Size getPreviewSize() {
String pair = get(KEY_PREVIEW_SIZE);
return strToSize(pair);
}
/**
* Gets the supported preview sizes.
*
* @return a list of Size object. This method will always return a list
* with at least one element.
*/
public List<Size> getSupportedPreviewSizes() {
String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX);
return splitSize(str);
}
/**
* Sets the dimensions for EXIF thumbnail in Jpeg picture. If
* applications set both width and height to 0, EXIF will not contain
* thumbnail.
*
* Applications need to consider the display orientation. See {@link
* #setPreviewSize(int,int)} for reference.
*
* @param width the width of the thumbnail, in pixels
* @param height the height of the thumbnail, in pixels
* @see #setPreviewSize(int,int)
*/
public void setJpegThumbnailSize(int width, int height) {
set(KEY_JPEG_THUMBNAIL_WIDTH, width);
set(KEY_JPEG_THUMBNAIL_HEIGHT, height);
}
/**
* Returns the dimensions for EXIF thumbnail in Jpeg picture.
*
* @return a Size object with the height and width setting for the EXIF
* thumbnails
*/
public Size getJpegThumbnailSize() {
return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH),
getInt(KEY_JPEG_THUMBNAIL_HEIGHT));
}
/**
* Gets the supported jpeg thumbnail sizes.
*
* @return a list of Size object. This method will always return a list
* with at least two elements. Size 0,0 (no thumbnail) is always
* supported.
*/
public List<Size> getSupportedJpegThumbnailSizes() {
String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX);
return splitSize(str);
}
/**
* Sets the quality of the EXIF thumbnail in Jpeg picture.
*
* @param quality the JPEG quality of the EXIF thumbnail. The range is 1
* to 100, with 100 being the best.
*/
public void setJpegThumbnailQuality(int quality) {
set(KEY_JPEG_THUMBNAIL_QUALITY, quality);
}
/**
* Returns the quality setting for the EXIF thumbnail in Jpeg picture.
*
* @return the JPEG quality setting of the EXIF thumbnail.
*/
public int getJpegThumbnailQuality() {
return getInt(KEY_JPEG_THUMBNAIL_QUALITY);
}
/**
* Sets Jpeg quality of captured picture.
*
* @param quality the JPEG quality of captured picture. The range is 1
* to 100, with 100 being the best.
*/
public void setJpegQuality(int quality) {
set(KEY_JPEG_QUALITY, quality);
}
/**
* Returns the quality setting for the JPEG picture.
*
* @return the JPEG picture quality setting.
*/
public int getJpegQuality() {
return getInt(KEY_JPEG_QUALITY);
}
/**
* Sets the rate at which preview frames are received. This is the
* target frame rate. The actual frame rate depends on the driver.
*
* @param fps the frame rate (frames per second)
* @deprecated replaced by {@link #setPreviewFpsRange(int,int)}
*/
@Deprecated
public void setPreviewFrameRate(int fps) {
set(KEY_PREVIEW_FRAME_RATE, fps);
}
/**
* Returns the setting for the rate at which preview frames are
* received. This is the target frame rate. The actual frame rate
* depends on the driver.
*
* @return the frame rate setting (frames per second)
* @deprecated replaced by {@link #getPreviewFpsRange(int[])}
*/
@Deprecated
public int getPreviewFrameRate() {
return getInt(KEY_PREVIEW_FRAME_RATE);
}
/**
* Gets the supported preview frame rates.
*
* @return a list of supported preview frame rates. null if preview
* frame rate setting is not supported.
* @deprecated replaced by {@link #getSupportedPreviewFpsRange()}
*/
@Deprecated
public List<Integer> getSupportedPreviewFrameRates() {
String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX);
return splitInt(str);
}
/**
* Sets the maximum and maximum preview fps. This controls the rate of
* preview frames received in {@link PreviewCallback}. The minimum and
* maximum preview fps must be one of the elements from {@link
* #getSupportedPreviewFpsRange}.
*
* @param min the minimum preview fps (scaled by 1000).
* @param max the maximum preview fps (scaled by 1000).
* @throws RuntimeException if fps range is invalid.
* @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback)
* @see #getSupportedPreviewFpsRange()
*/
public void setPreviewFpsRange(int min, int max) {
set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max);
}
/**
* Returns the current minimum and maximum preview fps. The values are
* one of the elements returned by {@link #getSupportedPreviewFpsRange}.
*
* @return range the minimum and maximum preview fps (scaled by 1000).
* @see #PREVIEW_FPS_MIN_INDEX
* @see #PREVIEW_FPS_MAX_INDEX
* @see #getSupportedPreviewFpsRange()
*/
public void getPreviewFpsRange(int[] range) {
if (range == null || range.length != 2) {
throw new IllegalArgumentException(
"range must be an array with two elements.");
}
splitInt(get(KEY_PREVIEW_FPS_RANGE), range);
}
/**
* Gets the supported preview fps (frame-per-second) ranges. Each range
* contains a minimum fps and maximum fps. If minimum fps equals to
* maximum fps, the camera outputs frames in fixed frame rate. If not,
* the camera outputs frames in auto frame rate. The actual frame rate
* fluctuates between the minimum and the maximum. The values are
* multiplied by 1000 and represented in integers. For example, if frame
* rate is 26.623 frames per second, the value is 26623.
*
* @return a list of supported preview fps ranges. This method returns a
* list with at least one element. Every element is an int array
* of two values - minimum fps and maximum fps. The list is
* sorted from small to large (first by maximum fps and then
* minimum fps).
* @see #PREVIEW_FPS_MIN_INDEX
* @see #PREVIEW_FPS_MAX_INDEX
*/
public List<int[]> getSupportedPreviewFpsRange() {
String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX);
return splitRange(str);
}
/**
* Sets the image format for preview pictures.
* <p>If this is never called, the default format will be
* {@link android.graphics.ImageFormat#NV21}, which
* uses the NV21 encoding format.</p>
*
* @param pixel_format the desired preview picture format, defined
* by one of the {@link android.graphics.ImageFormat} constants.
* (E.g., <var>ImageFormat.NV21</var> (default),
* <var>ImageFormat.RGB_565</var>, or
* <var>ImageFormat.JPEG</var>)
* @see android.graphics.ImageFormat
*/
public void setPreviewFormat(int pixel_format) {
String s = cameraFormatForPixelFormat(pixel_format);
if (s == null) {
throw new IllegalArgumentException(
"Invalid pixel_format=" + pixel_format);
}
set(KEY_PREVIEW_FORMAT, s);
}
/**
* Returns the image format for preview frames got from
* {@link PreviewCallback}.
*
* @return the preview format.
* @see android.graphics.ImageFormat
*/
public int getPreviewFormat() {
return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT));
}
/**
* Gets the supported preview formats.
*
* @return a list of supported preview formats. This method will always
* return a list with at least one element.
* @see android.graphics.ImageFormat
*/
public List<Integer> getSupportedPreviewFormats() {
String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX);
ArrayList<Integer> formats = new ArrayList<Integer>();
for (String s : split(str)) {
int f = pixelFormatForCameraFormat(s);
if (f == ImageFormat.UNKNOWN) continue;
formats.add(f);
}
return formats;
}
/**
* Sets the dimensions for pictures.
*
* Applications need to consider the display orientation. See {@link
* #setPreviewSize(int,int)} for reference.
*
* @param width the width for pictures, in pixels
* @param height the height for pictures, in pixels
* @see #setPreviewSize(int,int)
*
*/
public void setPictureSize(int width, int height) {
String v = Integer.toString(width) + "x" + Integer.toString(height);
set(KEY_PICTURE_SIZE, v);
}
/**
* Returns the dimension setting for pictures.
*
* @return a Size object with the height and width setting
* for pictures
*/
public Size getPictureSize() {
String pair = get(KEY_PICTURE_SIZE);
return strToSize(pair);
}
/**
* Gets the supported picture sizes.
*
* @return a list of supported picture sizes. This method will always
* return a list with at least one element.
*/
public List<Size> getSupportedPictureSizes() {
String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX);
return splitSize(str);
}
/**
* Sets the image format for pictures.
*
* @param pixel_format the desired picture format
* (<var>ImageFormat.NV21</var>,
* <var>ImageFormat.RGB_565</var>, or
* <var>ImageFormat.JPEG</var>)
* @see android.graphics.ImageFormat
*/
public void setPictureFormat(int pixel_format) {
String s = cameraFormatForPixelFormat(pixel_format);
if (s == null) {
throw new IllegalArgumentException(
"Invalid pixel_format=" + pixel_format);
}
set(KEY_PICTURE_FORMAT, s);
}
/**
* Returns the image format for pictures.
*
* @return the picture format
* @see android.graphics.ImageFormat
*/
public int getPictureFormat() {
return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT));
}
/**
* Gets the supported picture formats.
*
* @return supported picture formats. This method will always return a
* list with at least one element.
* @see android.graphics.ImageFormat
*/
public List<Integer> getSupportedPictureFormats() {
String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX);
ArrayList<Integer> formats = new ArrayList<Integer>();
for (String s : split(str)) {
int f = pixelFormatForCameraFormat(s);
if (f == ImageFormat.UNKNOWN) continue;
formats.add(f);
}
return formats;
}
private String cameraFormatForPixelFormat(int pixel_format) {
switch(pixel_format) {
case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP;
case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP;
case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I;
case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565;
case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG;
default: return null;
}
}
private int pixelFormatForCameraFormat(String format) {
if (format == null)
return ImageFormat.UNKNOWN;
if (format.equals(PIXEL_FORMAT_YUV422SP))
return ImageFormat.NV16;
if (format.equals(PIXEL_FORMAT_YUV420SP))
return ImageFormat.NV21;
if (format.equals(PIXEL_FORMAT_YUV422I))
return ImageFormat.YUY2;
if (format.equals(PIXEL_FORMAT_RGB565))
return ImageFormat.RGB_565;
if (format.equals(PIXEL_FORMAT_JPEG))
return ImageFormat.JPEG;
return ImageFormat.UNKNOWN;
}
/**
* Sets the rotation angle in degrees relative to the orientation of
* the camera. This affects the pictures returned from JPEG {@link
* PictureCallback}. The camera driver may set orientation in the
* EXIF header without rotating the picture. Or the driver may rotate
* the picture and the EXIF thumbnail. If the Jpeg picture is rotated,
* the orientation in the EXIF header will be missing or 1 (row #0 is
* top and column #0 is left side).
*
* <p>If applications want to rotate the picture to match the orientation
* of what users see, apps should use {@link
* android.view.OrientationEventListener} and {@link CameraInfo}.
* The value from OrientationEventListener is relative to the natural
* orientation of the device. CameraInfo.orientation is the angle
* between camera orientation and natural device orientation. The sum
* of the two is the rotation angle for back-facing camera. The
* difference of the two is the rotation angle for front-facing camera.
* Note that the JPEG pictures of front-facing cameras are not mirrored
* as in preview display.
*
* <p>For example, suppose the natural orientation of the device is
* portrait. The device is rotated 270 degrees clockwise, so the device
* orientation is 270. Suppose a back-facing camera sensor is mounted in
* landscape and the top side of the camera sensor is aligned with the
* right edge of the display in natural orientation. So the camera
* orientation is 90. The rotation should be set to 0 (270 + 90).
*
* <p>The reference code is as follows.
*
* <pre>
* public void public void onOrientationChanged(int orientation) {
* if (orientation == ORIENTATION_UNKNOWN) return;
* android.hardware.Camera.CameraInfo info =
* new android.hardware.Camera.CameraInfo();
* android.hardware.Camera.getCameraInfo(cameraId, info);
* orientation = (orientation + 45) / 90 * 90;
* int rotation = 0;
* if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
* rotation = (info.orientation - orientation + 360) % 360;
* } else { // back-facing camera
* rotation = (info.orientation + orientation) % 360;
* }
* mParameters.setRotation(rotation);
* }
* </pre>
*
* @param rotation The rotation angle in degrees relative to the
* orientation of the camera. Rotation can only be 0,
* 90, 180 or 270.
* @throws IllegalArgumentException if rotation value is invalid.
* @see android.view.OrientationEventListener
* @see #getCameraInfo(int, CameraInfo)
*/
public void setRotation(int rotation) {
if (rotation == 0 || rotation == 90 || rotation == 180
|| rotation == 270) {
set(KEY_ROTATION, Integer.toString(rotation));
} else {
throw new IllegalArgumentException(
"Invalid rotation=" + rotation);
}
}
/**
* Sets GPS latitude coordinate. This will be stored in JPEG EXIF
* header.
*
* @param latitude GPS latitude coordinate.
*/
public void setGpsLatitude(double latitude) {
set(KEY_GPS_LATITUDE, Double.toString(latitude));
}
/**
* Sets GPS longitude coordinate. This will be stored in JPEG EXIF
* header.
*
* @param longitude GPS longitude coordinate.
*/
public void setGpsLongitude(double longitude) {
set(KEY_GPS_LONGITUDE, Double.toString(longitude));
}
/**
* Sets GPS altitude. This will be stored in JPEG EXIF header.
*
* @param altitude GPS altitude in meters.
*/
public void setGpsAltitude(double altitude) {
set(KEY_GPS_ALTITUDE, Double.toString(altitude));
}
/**
* Sets GPS timestamp. This will be stored in JPEG EXIF header.
*
* @param timestamp GPS timestamp (UTC in seconds since January 1,
* 1970).
*/
public void setGpsTimestamp(long timestamp) {
set(KEY_GPS_TIMESTAMP, Long.toString(timestamp));
}
/**
* Sets GPS processing method. It will store up to 32 characters
* in JPEG EXIF header.
*
* @param processing_method The processing method to get this location.
*/
public void setGpsProcessingMethod(String processing_method) {
set(KEY_GPS_PROCESSING_METHOD, processing_method);
}
/**
* Removes GPS latitude, longitude, altitude, and timestamp from the
* parameters.
*/
public void removeGpsData() {
remove(KEY_GPS_LATITUDE);
remove(KEY_GPS_LONGITUDE);
remove(KEY_GPS_ALTITUDE);
remove(KEY_GPS_TIMESTAMP);
remove(KEY_GPS_PROCESSING_METHOD);
}
/**
* Gets the current white balance setting.
*
* @return current white balance. null if white balance setting is not
* supported.
* @see #WHITE_BALANCE_AUTO
* @see #WHITE_BALANCE_INCANDESCENT
* @see #WHITE_BALANCE_FLUORESCENT
* @see #WHITE_BALANCE_WARM_FLUORESCENT
* @see #WHITE_BALANCE_DAYLIGHT
* @see #WHITE_BALANCE_CLOUDY_DAYLIGHT
* @see #WHITE_BALANCE_TWILIGHT
* @see #WHITE_BALANCE_SHADE
*
*/
public String getWhiteBalance() {
return get(KEY_WHITE_BALANCE);
}
/**
* Sets the white balance.
*
* @param value new white balance.
* @see #getWhiteBalance()
*/
public void setWhiteBalance(String value) {
set(KEY_WHITE_BALANCE, value);
}
/**
* Gets the supported white balance.
*
* @return a list of supported white balance. null if white balance
* setting is not supported.
* @see #getWhiteBalance()
*/
public List<String> getSupportedWhiteBalance() {
String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current color effect setting.
*
* @return current color effect. null if color effect
* setting is not supported.
* @see #EFFECT_NONE
* @see #EFFECT_MONO
* @see #EFFECT_NEGATIVE
* @see #EFFECT_SOLARIZE
* @see #EFFECT_SEPIA
* @see #EFFECT_POSTERIZE
* @see #EFFECT_WHITEBOARD
* @see #EFFECT_BLACKBOARD
* @see #EFFECT_AQUA
*/
public String getColorEffect() {
return get(KEY_EFFECT);
}
/**
* Sets the current color effect setting.
*
* @param value new color effect.
* @see #getColorEffect()
*/
public void setColorEffect(String value) {
set(KEY_EFFECT, value);
}
/**
* Gets the supported color effects.
*
* @return a list of supported color effects. null if color effect
* setting is not supported.
* @see #getColorEffect()
*/
public List<String> getSupportedColorEffects() {
String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current antibanding setting.
*
* @return current antibanding. null if antibanding setting is not
* supported.
* @see #ANTIBANDING_AUTO
* @see #ANTIBANDING_50HZ
* @see #ANTIBANDING_60HZ
* @see #ANTIBANDING_OFF
*/
public String getAntibanding() {
return get(KEY_ANTIBANDING);
}
/**
* Sets the antibanding.
*
* @param antibanding new antibanding value.
* @see #getAntibanding()
*/
public void setAntibanding(String antibanding) {
set(KEY_ANTIBANDING, antibanding);
}
/**
* Gets the supported antibanding values.
*
* @return a list of supported antibanding values. null if antibanding
* setting is not supported.
* @see #getAntibanding()
*/
public List<String> getSupportedAntibanding() {
String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current scene mode setting.
*
* @return one of SCENE_MODE_XXX string constant. null if scene mode
* setting is not supported.
* @see #SCENE_MODE_AUTO
* @see #SCENE_MODE_ACTION
* @see #SCENE_MODE_PORTRAIT
* @see #SCENE_MODE_LANDSCAPE
* @see #SCENE_MODE_NIGHT
* @see #SCENE_MODE_NIGHT_PORTRAIT
* @see #SCENE_MODE_THEATRE
* @see #SCENE_MODE_BEACH
* @see #SCENE_MODE_SNOW
* @see #SCENE_MODE_SUNSET
* @see #SCENE_MODE_STEADYPHOTO
* @see #SCENE_MODE_FIREWORKS
* @see #SCENE_MODE_SPORTS
* @see #SCENE_MODE_PARTY
* @see #SCENE_MODE_CANDLELIGHT
*/
public String getSceneMode() {
return get(KEY_SCENE_MODE);
}
/**
* Sets the scene mode. Changing scene mode may override other
* parameters (such as flash mode, focus mode, white balance). For
* example, suppose originally flash mode is on and supported flash
* modes are on/off. In night scene mode, both flash mode and supported
* flash mode may be changed to off. After setting scene mode,
* applications should call getParameters to know if some parameters are
* changed.
*
* @param value scene mode.
* @see #getSceneMode()
*/
public void setSceneMode(String value) {
set(KEY_SCENE_MODE, value);
}
/**
* Gets the supported scene modes.
*
* @return a list of supported scene modes. null if scene mode setting
* is not supported.
* @see #getSceneMode()
*/
public List<String> getSupportedSceneModes() {
String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current flash mode setting.
*
* @return current flash mode. null if flash mode setting is not
* supported.
* @see #FLASH_MODE_OFF
* @see #FLASH_MODE_AUTO
* @see #FLASH_MODE_ON
* @see #FLASH_MODE_RED_EYE
* @see #FLASH_MODE_TORCH
*/
public String getFlashMode() {
return get(KEY_FLASH_MODE);
}
/**
* Sets the flash mode.
*
* @param value flash mode.
* @see #getFlashMode()
*/
public void setFlashMode(String value) {
set(KEY_FLASH_MODE, value);
}
/**
* Gets the supported flash modes.
*
* @return a list of supported flash modes. null if flash mode setting
* is not supported.
* @see #getFlashMode()
*/
public List<String> getSupportedFlashModes() {
String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current focus mode setting.
*
* @return current focus mode. This method will always return a non-null
* value. Applications should call {@link
* #autoFocus(AutoFocusCallback)} to start the focus if focus
* mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO.
* @see #FOCUS_MODE_AUTO
* @see #FOCUS_MODE_INFINITY
* @see #FOCUS_MODE_MACRO
* @see #FOCUS_MODE_FIXED
* @see #FOCUS_MODE_EDOF
* @see #FOCUS_MODE_CONTINUOUS_VIDEO
*/
public String getFocusMode() {
return get(KEY_FOCUS_MODE);
}
/**
* Sets the focus mode.
*
* @param value focus mode.
* @see #getFocusMode()
*/
public void setFocusMode(String value) {
set(KEY_FOCUS_MODE, value);
}
/**
* Gets the supported focus modes.
*
* @return a list of supported focus modes. This method will always
* return a list with at least one element.
* @see #getFocusMode()
*/
public List<String> getSupportedFocusModes() {
String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the focal length (in millimeter) of the camera.
*
* @return the focal length. This method will always return a valid
* value.
*/
public float getFocalLength() {
return Float.parseFloat(get(KEY_FOCAL_LENGTH));
}
/**
* Gets the horizontal angle of view in degrees.
*
* @return horizontal angle of view. This method will always return a
* valid value.
*/
public float getHorizontalViewAngle() {
return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE));
}
/**
* Gets the vertical angle of view in degrees.
*
* @return vertical angle of view. This method will always return a
* valid value.
*/
public float getVerticalViewAngle() {
return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE));
}
/**
* Gets the current exposure compensation index.
*
* @return current exposure compensation index. The range is {@link
* #getMinExposureCompensation} to {@link
* #getMaxExposureCompensation}. 0 means exposure is not
* adjusted.
*/
public int getExposureCompensation() {
return getInt(KEY_EXPOSURE_COMPENSATION, 0);
}
/**
* Sets the exposure compensation index.
*
* @param value exposure compensation index. The valid value range is
* from {@link #getMinExposureCompensation} (inclusive) to {@link
* #getMaxExposureCompensation} (inclusive). 0 means exposure is
* not adjusted. Application should call
* getMinExposureCompensation and getMaxExposureCompensation to
* know if exposure compensation is supported.
*/
public void setExposureCompensation(int value) {
set(KEY_EXPOSURE_COMPENSATION, value);
}
/**
* Gets the maximum exposure compensation index.
*
* @return maximum exposure compensation index (>=0). If both this
* method and {@link #getMinExposureCompensation} return 0,
* exposure compensation is not supported.
*/
public int getMaxExposureCompensation() {
return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0);
}
/**
* Gets the minimum exposure compensation index.
*
* @return minimum exposure compensation index (<=0). If both this
* method and {@link #getMaxExposureCompensation} return 0,
* exposure compensation is not supported.
*/
public int getMinExposureCompensation() {
return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0);
}
/**
* Gets the exposure compensation step.
*
* @return exposure compensation step. Applications can get EV by
* multiplying the exposure compensation index and step. Ex: if
* exposure compensation index is -6 and step is 0.333333333, EV
* is -2.
*/
public float getExposureCompensationStep() {
return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0);
}
/**
* Gets current zoom value. This also works when smooth zoom is in
* progress. Applications should check {@link #isZoomSupported} before
* using this method.
*
* @return the current zoom value. The range is 0 to {@link
* #getMaxZoom}. 0 means the camera is not zoomed.
*/
public int getZoom() {
return getInt(KEY_ZOOM, 0);
}
/**
* Sets current zoom value. If the camera is zoomed (value > 0), the
* actual picture size may be smaller than picture size setting.
* Applications can check the actual picture size after picture is
* returned from {@link PictureCallback}. The preview size remains the
* same in zoom. Applications should check {@link #isZoomSupported}
* before using this method.
*
* @param value zoom value. The valid range is 0 to {@link #getMaxZoom}.
*/
public void setZoom(int value) {
set(KEY_ZOOM, value);
}
/**
* Returns true if zoom is supported. Applications should call this
* before using other zoom methods.
*
* @return true if zoom is supported.
*/
public boolean isZoomSupported() {
String str = get(KEY_ZOOM_SUPPORTED);
return TRUE.equals(str);
}
/**
* Gets the maximum zoom value allowed for snapshot. This is the maximum
* value that applications can set to {@link #setZoom(int)}.
* Applications should call {@link #isZoomSupported} before using this
* method. This value may change in different preview size. Applications
* should call this again after setting preview size.
*
* @return the maximum zoom value supported by the camera.
*/
public int getMaxZoom() {
return getInt(KEY_MAX_ZOOM, 0);
}
/**
* Gets the zoom ratios of all zoom values. Applications should check
* {@link #isZoomSupported} before using this method.
*
* @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is
* returned as 320. The number of elements is {@link
* #getMaxZoom} + 1. The list is sorted from small to large. The
* first element is always 100. The last element is the zoom
* ratio of the maximum zoom value.
*/
public List<Integer> getZoomRatios() {
return splitInt(get(KEY_ZOOM_RATIOS));
}
/**
* Returns true if smooth zoom is supported. Applications should call
* this before using other smooth zoom methods.
*
* @return true if smooth zoom is supported.
*/
public boolean isSmoothZoomSupported() {
String str = get(KEY_SMOOTH_ZOOM_SUPPORTED);
return TRUE.equals(str);
}
/**
* Gets the distances from the camera to where an object appears to be
* in focus. The object is sharpest at the optimal focus distance. The
* depth of field is the far focus distance minus near focus distance.
*
* Focus distances may change after calling {@link
* #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link
* #startPreview()}. Applications can call {@link #getParameters()}
* and this method anytime to get the latest focus distances. If the
* focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change
* from time to time.
*
* This method is intended to estimate the distance between the camera
* and the subject. After autofocus, the subject distance may be within
* near and far focus distance. However, the precision depends on the
* camera hardware, autofocus algorithm, the focus area, and the scene.
* The error can be large and it should be only used as a reference.
*
* Far focus distance >= optimal focus distance >= near focus distance.
* If the focus distance is infinity, the value will be
* Float.POSITIVE_INFINITY.
*
* @param output focus distances in meters. output must be a float
* array with three elements. Near focus distance, optimal focus
* distance, and far focus distance will be filled in the array.
* @see #FOCUS_DISTANCE_NEAR_INDEX
* @see #FOCUS_DISTANCE_OPTIMAL_INDEX
* @see #FOCUS_DISTANCE_FAR_INDEX
*/
public void getFocusDistances(float[] output) {
if (output == null || output.length != 3) {
throw new IllegalArgumentException(
"output must be an float array with three elements.");
}
splitFloat(get(KEY_FOCUS_DISTANCES), output);
}
// Splits a comma delimited string to an ArrayList of String.
// Return null if the passing string is null or the size is 0.
private ArrayList<String> split(String str) {
if (str == null) return null;
// Use StringTokenizer because it is faster than split.
StringTokenizer tokenizer = new StringTokenizer(str, ",");
ArrayList<String> substrings = new ArrayList<String>();
while (tokenizer.hasMoreElements()) {
substrings.add(tokenizer.nextToken());
}
return substrings;
}
// Splits a comma delimited string to an ArrayList of Integer.
// Return null if the passing string is null or the size is 0.
private ArrayList<Integer> splitInt(String str) {
if (str == null) return null;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
ArrayList<Integer> substrings = new ArrayList<Integer>();
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
substrings.add(Integer.parseInt(token));
}
if (substrings.size() == 0) return null;
return substrings;
}
private void splitInt(String str, int[] output) {
if (str == null) return;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
int index = 0;
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
output[index++] = Integer.parseInt(token);
}
}
// Splits a comma delimited string to an ArrayList of Float.
private void splitFloat(String str, float[] output) {
if (str == null) return;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
int index = 0;
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
output[index++] = Float.parseFloat(token);
}
}
// Returns the value of a float parameter.
private float getFloat(String key, float defaultValue) {
try {
return Float.parseFloat(mMap.get(key));
} catch (NumberFormatException ex) {
return defaultValue;
}
}
// Returns the value of a integer parameter.
private int getInt(String key, int defaultValue) {
try {
return Integer.parseInt(mMap.get(key));
} catch (NumberFormatException ex) {
return defaultValue;
}
}
// Splits a comma delimited string to an ArrayList of Size.
// Return null if the passing string is null or the size is 0.
private ArrayList<Size> splitSize(String str) {
if (str == null) return null;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
ArrayList<Size> sizeList = new ArrayList<Size>();
while (tokenizer.hasMoreElements()) {
Size size = strToSize(tokenizer.nextToken());
if (size != null) sizeList.add(size);
}
if (sizeList.size() == 0) return null;
return sizeList;
}
// Parses a string (ex: "480x320") to Size object.
// Return null if the passing string is null.
private Size strToSize(String str) {
if (str == null) return null;
int pos = str.indexOf('x');
if (pos != -1) {
String width = str.substring(0, pos);
String height = str.substring(pos + 1);
return new Size(Integer.parseInt(width),
Integer.parseInt(height));
}
Log.e(TAG, "Invalid size parameter string=" + str);
return null;
}
// Splits a comma delimited string to an ArrayList of int array.
// Example string: "(10000,26623),(10000,30000)". Return null if the
// passing string is null or the size is 0.
private ArrayList<int[]> splitRange(String str) {
if (str == null || str.charAt(0) != '('
|| str.charAt(str.length() - 1) != ')') {
Log.e(TAG, "Invalid range list string=" + str);
return null;
}
ArrayList<int[]> rangeList = new ArrayList<int[]>();
int endIndex, fromIndex = 1;
do {
int[] range = new int[2];
endIndex = str.indexOf("),(", fromIndex);
if (endIndex == -1) endIndex = str.length() - 1;
splitInt(str.substring(fromIndex, endIndex), range);
rangeList.add(range);
fromIndex = endIndex + 3;
} while (endIndex != str.length() - 1);
if (rangeList.size() == 0) return null;
return rangeList;
}
};
}
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.hardware;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.StringTokenizer;
import java.io.IOException;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.graphics.ImageFormat;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
/**
* The Camera class is used to set image capture settings, start/stop preview,
* snap pictures, and retrieve frames for encoding for video. This class is a
* client for the Camera service, which manages the actual camera hardware.
*
* <p>To access the device camera, you must declare the
* {@link android.Manifest.permission#CAMERA} permission in your Android
* Manifest. Also be sure to include the
* <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a>
* manifest element to declare camera features used by your application.
* For example, if you use the camera and auto-focus feature, your Manifest
* should include the following:</p>
* <pre> <uses-permission android:name="android.permission.CAMERA" />
* <uses-feature android:name="android.hardware.camera" />
* <uses-feature android:name="android.hardware.camera.autofocus" /></pre>
*
* <p>To take pictures with this class, use the following steps:</p>
*
* <ol>
* <li>Obtain an instance of Camera from {@link #open(int)}.
*
* <li>Get existing (default) settings with {@link #getParameters()}.
*
* <li>If necessary, modify the returned {@link Camera.Parameters} object and call
* {@link #setParameters(Camera.Parameters)}.
*
* <li>If desired, call {@link #setDisplayOrientation(int)}.
*
* <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to
* {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera
* will be unable to start the preview.
*
* <li><b>Important</b>: Call {@link #startPreview()} to start updating the
* preview surface. Preview must be started before you can take a picture.
*
* <li>When you want, call {@link #takePicture(Camera.ShutterCallback,
* Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to
* capture a photo. Wait for the callbacks to provide the actual image data.
*
* <li>After taking a picture, preview display will have stopped. To take more
* photos, call {@link #startPreview()} again first.
*
* <li>Call {@link #stopPreview()} to stop updating the preview surface.
*
* <li><b>Important:</b> Call {@link #release()} to release the camera for
* use by other applications. Applications should release the camera
* immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()}
* it in {@link android.app.Activity#onResume()}).
* </ol>
*
* <p>To quickly switch to video recording mode, use these steps:</p>
*
* <ol>
* <li>Obtain and initialize a Camera and start preview as described above.
*
* <li>Call {@link #unlock()} to allow the media process to access the camera.
*
* <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}.
* See {@link android.media.MediaRecorder} information about video recording.
*
* <li>When finished recording, call {@link #reconnect()} to re-acquire
* and re-lock the camera.
*
* <li>If desired, restart preview and take more photos or videos.
*
* <li>Call {@link #stopPreview()} and {@link #release()} as described above.
* </ol>
*
* <p>This class is not thread-safe, and is meant for use from one event thread.
* Most long-running operations (preview, focus, photo capture, etc) happen
* asynchronously and invoke callbacks as necessary. Callbacks will be invoked
* on the event thread {@link #open(int)} was called from. This class's methods
* must never be called from multiple threads at once.</p>
*
* <p class="caution"><strong>Caution:</strong> Different Android-powered devices
* may have different hardware specifications, such as megapixel ratings and
* auto-focus capabilities. In order for your application to be compatible with
* more devices, you should not make assumptions about the device camera
* specifications.</p>
*/
public class Camera {
private static final String TAG = "Camera";
// These match the enums in frameworks/base/include/camera/Camera.h
private static final int CAMERA_MSG_ERROR = 0x001;
private static final int CAMERA_MSG_SHUTTER = 0x002;
private static final int CAMERA_MSG_FOCUS = 0x004;
private static final int CAMERA_MSG_ZOOM = 0x008;
private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010;
private static final int CAMERA_MSG_VIDEO_FRAME = 0x020;
private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040;
private static final int CAMERA_MSG_RAW_IMAGE = 0x080;
private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100;
private static final int CAMERA_MSG_ALL_MSGS = 0x1FF;
private int mNativeContext; // accessed by native methods
private EventHandler mEventHandler;
private ShutterCallback mShutterCallback;
private PictureCallback mRawImageCallback;
private PictureCallback mJpegCallback;
private PreviewCallback mPreviewCallback;
private PictureCallback mPostviewCallback;
private AutoFocusCallback mAutoFocusCallback;
private OnZoomChangeListener mZoomListener;
private ErrorCallback mErrorCallback;
private boolean mOneShot;
private boolean mWithBuffer;
/**
* Returns the number of physical cameras available on this device.
*/
public native static int getNumberOfCameras();
/**
* Returns the information about a particular camera.
* If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1.
*/
public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo);
/**
* Information about a camera
*/
public static class CameraInfo {
/**
* The facing of the camera is opposite to that of the screen.
*/
public static final int CAMERA_FACING_BACK = 0;
/**
* The facing of the camera is the same as that of the screen.
*/
public static final int CAMERA_FACING_FRONT = 1;
/**
* The direction that the camera faces to. It should be
* CAMERA_FACING_BACK or CAMERA_FACING_FRONT.
*/
public int facing;
/**
* The orientation of the camera image. The value is the angle that the
* camera image needs to be rotated clockwise so it shows correctly on
* the display in its natural orientation. It should be 0, 90, 180, or 270.
*
* For example, suppose a device has a naturally tall screen. The
* back-facing camera sensor is mounted in landscape. You are looking at
* the screen. If the top side of the camera sensor is aligned with the
* right edge of the screen in natural orientation, the value should be
* 90. If the top side of a front-facing camera sensor is aligned with
* the right of the screen, the value should be 270.
*
* @see #setDisplayOrientation(int)
* @see Parameters#setRotation(int)
* @see Parameters#setPreviewSize(int, int)
* @see Parameters#setPictureSize(int, int)
* @see Parameters#setJpegThumbnailSize(int, int)
*/
public int orientation;
};
/**
* Creates a new Camera object to access a particular hardware camera.
*
* <p>You must call {@link #release()} when you are done using the camera,
* otherwise it will remain locked and be unavailable to other applications.
*
* <p>Your application should only have one Camera object active at a time
* for a particular hardware camera.
*
* <p>Callbacks from other methods are delivered to the event loop of the
* thread which called open(). If this thread has no event loop, then
* callbacks are delivered to the main application event loop. If there
* is no main application event loop, callbacks are not delivered.
*
* <p class="caution"><b>Caution:</b> On some devices, this method may
* take a long time to complete. It is best to call this method from a
* worker thread (possibly using {@link android.os.AsyncTask}) to avoid
* blocking the main application UI thread.
*
* @param cameraId the hardware camera to access, between 0 and
* {@link #getNumberOfCameras()}-1.
* @return a new Camera object, connected, locked and ready for use.
* @throws RuntimeException if connection to the camera service fails (for
* example, if the camera is in use by another process).
*/
public static Camera open(int cameraId) {
return new Camera(cameraId);
}
/**
* Creates a new Camera object to access the first back-facing camera on the
* device. If the device does not have a back-facing camera, this returns
* null.
* @see #open(int)
*/
public static Camera open() {
int numberOfCameras = getNumberOfCameras();
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < numberOfCameras; i++) {
getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
return new Camera(i);
}
}
return null;
}
Camera(int cameraId) {
mShutterCallback = null;
mRawImageCallback = null;
mJpegCallback = null;
mPreviewCallback = null;
mPostviewCallback = null;
mZoomListener = null;
Looper looper;
if ((looper = Looper.myLooper()) != null) {
mEventHandler = new EventHandler(this, looper);
} else if ((looper = Looper.getMainLooper()) != null) {
mEventHandler = new EventHandler(this, looper);
} else {
mEventHandler = null;
}
native_setup(new WeakReference<Camera>(this), cameraId);
}
protected void finalize() {
native_release();
}
private native final void native_setup(Object camera_this, int cameraId);
private native final void native_release();
/**
* Disconnects and releases the Camera object resources.
*
* <p>You must call this as soon as you're done with the Camera object.</p>
*/
public final void release() {
native_release();
}
/**
* Unlocks the camera to allow another process to access it.
* Normally, the camera is locked to the process with an active Camera
* object until {@link #release()} is called. To allow rapid handoff
* between processes, you can call this method to release the camera
* temporarily for another process to use; once the other process is done
* you can call {@link #reconnect()} to reclaim the camera.
*
* <p>This must be done before calling
* {@link android.media.MediaRecorder#setCamera(Camera)}.
*
* <p>If you are not recording video, you probably do not need this method.
*
* @throws RuntimeException if the camera cannot be unlocked.
*/
public native final void unlock();
/**
* Re-locks the camera to prevent other processes from accessing it.
* Camera objects are locked by default unless {@link #unlock()} is
* called. Normally {@link #reconnect()} is used instead.
*
* <p>If you are not recording video, you probably do not need this method.
*
* @throws RuntimeException if the camera cannot be re-locked (for
* example, if the camera is still in use by another process).
*/
public native final void lock();
/**
* Reconnects to the camera service after another process used it.
* After {@link #unlock()} is called, another process may use the
* camera; when the process is done, you must reconnect to the camera,
* which will re-acquire the lock and allow you to continue using the
* camera.
*
* <p>This must be done after {@link android.media.MediaRecorder} is
* done recording if {@link android.media.MediaRecorder#setCamera(Camera)}
* was used.
*
* <p>If you are not recording video, you probably do not need this method.
*
* @throws IOException if a connection cannot be re-established (for
* example, if the camera is still in use by another process).
*/
public native final void reconnect() throws IOException;
/**
* Sets the {@link Surface} to be used for live preview.
* A surface is necessary for preview, and preview is necessary to take
* pictures. The same surface can be re-set without harm.
*
* <p>The {@link SurfaceHolder} must already contain a surface when this
* method is called. If you are using {@link android.view.SurfaceView},
* you will need to register a {@link SurfaceHolder.Callback} with
* {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for
* {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before
* calling setPreviewDisplay() or starting preview.
*
* <p>This method must be called before {@link #startPreview()}. The
* one exception is that if the preview surface is not set (or set to null)
* before startPreview() is called, then this method may be called once
* with a non-null parameter to set the preview surface. (This allows
* camera setup and surface creation to happen in parallel, saving time.)
* The preview surface may not otherwise change while preview is running.
*
* @param holder containing the Surface on which to place the preview,
* or null to remove the preview surface
* @throws IOException if the method fails (for example, if the surface
* is unavailable or unsuitable).
*/
public final void setPreviewDisplay(SurfaceHolder holder) throws IOException {
if (holder != null) {
setPreviewDisplay(holder.getSurface());
} else {
setPreviewDisplay((Surface)null);
}
}
private native final void setPreviewDisplay(Surface surface);
/**
* Callback interface used to deliver copies of preview frames as
* they are displayed.
*
* @see #setPreviewCallback(Camera.PreviewCallback)
* @see #setOneShotPreviewCallback(Camera.PreviewCallback)
* @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback)
* @see #startPreview()
*/
public interface PreviewCallback
{
/**
* Called as preview frames are displayed. This callback is invoked
* on the event thread {@link #open(int)} was called from.
*
* @param data the contents of the preview frame in the format defined
* by {@link android.graphics.ImageFormat}, which can be queried
* with {@link android.hardware.Camera.Parameters#getPreviewFormat()}.
* If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)}
* is never called, the default will be the YCbCr_420_SP
* (NV21) format.
* @param camera the Camera service object.
*/
void onPreviewFrame(byte[] data, Camera camera);
};
/**
* Starts capturing and drawing preview frames to the screen.
* Preview will not actually start until a surface is supplied with
* {@link #setPreviewDisplay(SurfaceHolder)}.
*
* <p>If {@link #setPreviewCallback(Camera.PreviewCallback)},
* {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or
* {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were
* called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)}
* will be called when preview data becomes available.
*/
public native final void startPreview();
/**
* Stops capturing and drawing preview frames to the surface, and
* resets the camera for a future call to {@link #startPreview()}.
*/
public native final void stopPreview();
/**
* Return current preview state.
*
* FIXME: Unhide before release
* @hide
*/
public native final boolean previewEnabled();
/**
* Installs a callback to be invoked for every preview frame in addition
* to displaying them on the screen. The callback will be repeatedly called
* for as long as preview is active. This method can be called at any time,
* even while preview is live. Any other preview callbacks are overridden.
*
* @param cb a callback object that receives a copy of each preview frame,
* or null to stop receiving callbacks.
*/
public final void setPreviewCallback(PreviewCallback cb) {
mPreviewCallback = cb;
mOneShot = false;
mWithBuffer = false;
// Always use one-shot mode. We fake camera preview mode by
// doing one-shot preview continuously.
setHasPreviewCallback(cb != null, false);
}
/**
* Installs a callback to be invoked for the next preview frame in addition
* to displaying it on the screen. After one invocation, the callback is
* cleared. This method can be called any time, even when preview is live.
* Any other preview callbacks are overridden.
*
* @param cb a callback object that receives a copy of the next preview frame,
* or null to stop receiving callbacks.
*/
public final void setOneShotPreviewCallback(PreviewCallback cb) {
mPreviewCallback = cb;
mOneShot = true;
mWithBuffer = false;
setHasPreviewCallback(cb != null, false);
}
private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer);
/**
* Installs a callback to be invoked for every preview frame, using buffers
* supplied with {@link #addCallbackBuffer(byte[])}, in addition to
* displaying them on the screen. The callback will be repeatedly called
* for as long as preview is active and buffers are available.
* Any other preview callbacks are overridden.
*
* <p>The purpose of this method is to improve preview efficiency and frame
* rate by allowing preview frame memory reuse. You must call
* {@link #addCallbackBuffer(byte[])} at some point -- before or after
* calling this method -- or no callbacks will received.
*
* The buffer queue will be cleared if this method is called with a null
* callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called,
* or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called.
*
* @param cb a callback object that receives a copy of the preview frame,
* or null to stop receiving callbacks and clear the buffer queue.
* @see #addCallbackBuffer(byte[])
*/
public final void setPreviewCallbackWithBuffer(PreviewCallback cb) {
mPreviewCallback = cb;
mOneShot = false;
mWithBuffer = true;
setHasPreviewCallback(cb != null, true);
}
/**
* Adds a pre-allocated buffer to the preview callback buffer queue.
* Applications can add one or more buffers to the queue. When a preview
* frame arrives and there is still at least one available buffer, the
* buffer will be used and removed from the queue. Then preview callback is
* invoked with the buffer. If a frame arrives and there is no buffer left,
* the frame is discarded. Applications should add buffers back when they
* finish processing the data in them.
*
* <p>The size of the buffer is determined by multiplying the preview
* image width, height, and bytes per pixel. The width and height can be
* read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel
* can be computed from
* {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8,
* using the image format from {@link Camera.Parameters#getPreviewFormat()}.
*
* <p>This method is only necessary when
* {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When
* {@link #setPreviewCallback(PreviewCallback)} or
* {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers
* are automatically allocated.
*
* @param callbackBuffer the buffer to add to the queue.
* The size should be width * height * bits_per_pixel / 8.
* @see #setPreviewCallbackWithBuffer(PreviewCallback)
*/
public native final void addCallbackBuffer(byte[] callbackBuffer);
private class EventHandler extends Handler
{
private Camera mCamera;
public EventHandler(Camera c, Looper looper) {
super(looper);
mCamera = c;
}
@Override
public void handleMessage(Message msg) {
switch(msg.what) {
case CAMERA_MSG_SHUTTER:
if (mShutterCallback != null) {
mShutterCallback.onShutter();
}
return;
case CAMERA_MSG_RAW_IMAGE:
if (mRawImageCallback != null) {
mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_COMPRESSED_IMAGE:
if (mJpegCallback != null) {
mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_PREVIEW_FRAME:
if (mPreviewCallback != null) {
PreviewCallback cb = mPreviewCallback;
if (mOneShot) {
// Clear the callback variable before the callback
// in case the app calls setPreviewCallback from
// the callback function
mPreviewCallback = null;
} else if (!mWithBuffer) {
// We're faking the camera preview mode to prevent
// the app from being flooded with preview frames.
// Set to oneshot mode again.
setHasPreviewCallback(true, false);
}
cb.onPreviewFrame((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_POSTVIEW_FRAME:
if (mPostviewCallback != null) {
mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera);
}
return;
case CAMERA_MSG_FOCUS:
if (mAutoFocusCallback != null) {
mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera);
}
return;
case CAMERA_MSG_ZOOM:
if (mZoomListener != null) {
mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera);
}
return;
case CAMERA_MSG_ERROR :
Log.e(TAG, "Error " + msg.arg1);
if (mErrorCallback != null) {
mErrorCallback.onError(msg.arg1, mCamera);
}
return;
default:
Log.e(TAG, "Unknown message type " + msg.what);
return;
}
}
}
private static void postEventFromNative(Object camera_ref,
int what, int arg1, int arg2, Object obj)
{
Camera c = (Camera)((WeakReference)camera_ref).get();
if (c == null)
return;
if (c.mEventHandler != null) {
Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj);
c.mEventHandler.sendMessage(m);
}
}
/**
* Callback interface used to notify on completion of camera auto focus.
*
* <p>Devices that do not support auto-focus will receive a "fake"
* callback to this interface. If your application needs auto-focus and
* should not be installed on devices <em>without</em> auto-focus, you must
* declare that your app uses the
* {@code android.hardware.camera.autofocus} feature, in the
* <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a>
* manifest element.</p>
*
* @see #autoFocus(AutoFocusCallback)
*/
public interface AutoFocusCallback
{
/**
* Called when the camera auto focus completes. If the camera
* does not support auto-focus and autoFocus is called,
* onAutoFocus will be called immediately with a fake value of
* <code>success</code> set to <code>true</code>.
*
* @param success true if focus was successful, false if otherwise
* @param camera the Camera service object
*/
void onAutoFocus(boolean success, Camera camera);
};
/**
* Starts camera auto-focus and registers a callback function to run when
* the camera is focused. This method is only valid when preview is active
* (between {@link #startPreview()} and before {@link #stopPreview()}).
*
* <p>Callers should check
* {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if
* this method should be called. If the camera does not support auto-focus,
* it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)}
* callback will be called immediately.
*
* <p>If your application should not be installed
* on devices without auto-focus, you must declare that your application
* uses auto-focus with the
* <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a>
* manifest element.</p>
*
* <p>If the current flash mode is not
* {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be
* fired during auto-focus, depending on the driver and camera hardware.<p>
*
* @param cb the callback to run
* @see #cancelAutoFocus()
*/
public final void autoFocus(AutoFocusCallback cb)
{
mAutoFocusCallback = cb;
native_autoFocus();
}
private native final void native_autoFocus();
/**
* Cancels any auto-focus function in progress.
* Whether or not auto-focus is currently in progress,
* this function will return the focus position to the default.
* If the camera does not support auto-focus, this is a no-op.
*
* @see #autoFocus(Camera.AutoFocusCallback)
*/
public final void cancelAutoFocus()
{
mAutoFocusCallback = null;
native_cancelAutoFocus();
}
private native final void native_cancelAutoFocus();
/**
* Callback interface used to signal the moment of actual image capture.
*
* @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
*/
public interface ShutterCallback
{
/**
* Called as near as possible to the moment when a photo is captured
* from the sensor. This is a good opportunity to play a shutter sound
* or give other feedback of camera operation. This may be some time
* after the photo was triggered, but some time before the actual data
* is available.
*/
void onShutter();
}
/**
* Callback interface used to supply image data from a photo capture.
*
* @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
*/
public interface PictureCallback {
/**
* Called when image data is available after a picture is taken.
* The format of the data depends on the context of the callback
* and {@link Camera.Parameters} settings.
*
* @param data a byte array of the picture data
* @param camera the Camera service object
*/
void onPictureTaken(byte[] data, Camera camera);
};
/**
* Equivalent to takePicture(shutter, raw, null, jpeg).
*
* @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
*/
public final void takePicture(ShutterCallback shutter, PictureCallback raw,
PictureCallback jpeg) {
takePicture(shutter, raw, null, jpeg);
}
private native final void native_takePicture();
/**
* Triggers an asynchronous image capture. The camera service will initiate
* a series of callbacks to the application as the image capture progresses.
* The shutter callback occurs after the image is captured. This can be used
* to trigger a sound to let the user know that image has been captured. The
* raw callback occurs when the raw image data is available (NOTE: the data
* may be null if the hardware does not have enough memory to make a copy).
* The postview callback occurs when a scaled, fully processed postview
* image is available (NOTE: not all hardware supports this). The jpeg
* callback occurs when the compressed image is available. If the
* application does not need a particular callback, a null can be passed
* instead of a callback method.
*
* <p>This method is only valid when preview is active (after
* {@link #startPreview()}). Preview will be stopped after the image is
* taken; callers must call {@link #startPreview()} again if they want to
* re-start preview or take more pictures.
*
* <p>After calling this method, you must not call {@link #startPreview()}
* or take another picture until the JPEG callback has returned.
*
* @param shutter the callback for image capture moment, or null
* @param raw the callback for raw (uncompressed) image data, or null
* @param postview callback with postview image data, may be null
* @param jpeg the callback for JPEG image data, or null
*/
public final void takePicture(ShutterCallback shutter, PictureCallback raw,
PictureCallback postview, PictureCallback jpeg) {
mShutterCallback = shutter;
mRawImageCallback = raw;
mPostviewCallback = postview;
mJpegCallback = jpeg;
native_takePicture();
}
/**
* Zooms to the requested value smoothly. The driver will notify {@link
* OnZoomChangeListener} of the zoom value and whether zoom is stopped at
* the time. For example, suppose the current zoom is 0 and startSmoothZoom
* is called with value 3. The
* {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)}
* method will be called three times with zoom values 1, 2, and 3.
* Applications can call {@link #stopSmoothZoom} to stop the zoom earlier.
* Applications should not call startSmoothZoom again or change the zoom
* value before zoom stops. If the supplied zoom value equals to the current
* zoom value, no zoom callback will be generated. This method is supported
* if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported}
* returns true.
*
* @param value zoom value. The valid range is 0 to {@link
* android.hardware.Camera.Parameters#getMaxZoom}.
* @throws IllegalArgumentException if the zoom value is invalid.
* @throws RuntimeException if the method fails.
* @see #setZoomChangeListener(OnZoomChangeListener)
*/
public native final void startSmoothZoom(int value);
/**
* Stops the smooth zoom. Applications should wait for the {@link
* OnZoomChangeListener} to know when the zoom is actually stopped. This
* method is supported if {@link
* android.hardware.Camera.Parameters#isSmoothZoomSupported} is true.
*
* @throws RuntimeException if the method fails.
*/
public native final void stopSmoothZoom();
/**
* Set the clockwise rotation of preview display in degrees. This affects
* the preview frames and the picture displayed after snapshot. This method
* is useful for portrait mode applications. Note that preview display of
* front-facing cameras is flipped horizontally before the rotation, that
* is, the image is reflected along the central vertical axis of the camera
* sensor. So the users can see themselves as looking into a mirror.
*
* <p>This does not affect the order of byte array passed in {@link
* PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This
* method is not allowed to be called during preview.
*
* <p>If you want to make the camera image show in the same orientation as
* the display, you can use the following code.
* <pre>
* public static void setCameraDisplayOrientation(Activity activity,
* int cameraId, android.hardware.Camera camera) {
* android.hardware.Camera.CameraInfo info =
* new android.hardware.Camera.CameraInfo();
* android.hardware.Camera.getCameraInfo(cameraId, info);
* int rotation = activity.getWindowManager().getDefaultDisplay()
* .getRotation();
* int degrees = 0;
* switch (rotation) {
* case Surface.ROTATION_0: degrees = 0; break;
* case Surface.ROTATION_90: degrees = 90; break;
* case Surface.ROTATION_180: degrees = 180; break;
* case Surface.ROTATION_270: degrees = 270; break;
* }
*
* int result;
* if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
* result = (info.orientation + degrees) % 360;
* result = (360 - result) % 360; // compensate the mirror
* } else { // back-facing
* result = (info.orientation - degrees + 360) % 360;
* }
* camera.setDisplayOrientation(result);
* }
* </pre>
* @param degrees the angle that the picture will be rotated clockwise.
* Valid values are 0, 90, 180, and 270. The starting
* position is 0 (landscape).
* @see #setPreviewDisplay(SurfaceHolder)
*/
public native final void setDisplayOrientation(int degrees);
//0830zhao if type is 4: setTakepicFrequencyAndNum
public native final void setCustomerArg1AndArg2(int type,int arg1,int arg2);
/**
* Callback interface for zoom changes during a smooth zoom operation.
*
* @see #setZoomChangeListener(OnZoomChangeListener)
* @see #startSmoothZoom(int)
*/
public interface OnZoomChangeListener
{
/**
* Called when the zoom value has changed during a smooth zoom.
*
* @param zoomValue the current zoom value. In smooth zoom mode, camera
* calls this for every new zoom value.
* @param stopped whether smooth zoom is stopped. If the value is true,
* this is the last zoom update for the application.
* @param camera the Camera service object
*/
void onZoomChange(int zoomValue, boolean stopped, Camera camera);
};
/**
* Registers a listener to be notified when the zoom value is updated by the
* camera driver during smooth zoom.
*
* @param listener the listener to notify
* @see #startSmoothZoom(int)
*/
public final void setZoomChangeListener(OnZoomChangeListener listener)
{
mZoomListener = listener;
}
// Error codes match the enum in include/ui/Camera.h
/**
* Unspecified camera error.
* @see Camera.ErrorCallback
*/
public static final int CAMERA_ERROR_UNKNOWN = 1;
/**
* Media server died. In this case, the application must release the
* Camera object and instantiate a new one.
* @see Camera.ErrorCallback
*/
public static final int CAMERA_ERROR_SERVER_DIED = 100;
/**
* Callback interface for camera error notification.
*
* @see #setErrorCallback(ErrorCallback)
*/
public interface ErrorCallback
{
/**
* Callback for camera errors.
* @param error error code:
* <ul>
* <li>{@link #CAMERA_ERROR_UNKNOWN}
* <li>{@link #CAMERA_ERROR_SERVER_DIED}
* </ul>
* @param camera the Camera service object
*/
void onError(int error, Camera camera);
};
/**
* Registers a callback to be invoked when an error occurs.
* @param cb The callback to run
*/
public final void setErrorCallback(ErrorCallback cb)
{
mErrorCallback = cb;
}
private native final void native_setParameters(String params);
private native final String native_getParameters();
/**
* Changes the settings for this Camera service.
*
* @param params the Parameters to use for this Camera service
* @throws RuntimeException if any parameter is invalid or not supported.
* @see #getParameters()
*/
public void setParameters(Parameters params) {
native_setParameters(params.flatten());
}
/**
* Returns the current settings for this Camera service.
* If modifications are made to the returned Parameters, they must be passed
* to {@link #setParameters(Camera.Parameters)} to take effect.
*
* @see #setParameters(Camera.Parameters)
*/
public Parameters getParameters() {
Parameters p = new Parameters();
String s = native_getParameters();
p.unflatten(s);
return p;
}
/**
* Image size (width and height dimensions).
*/
public class Size {
/**
* Sets the dimensions for pictures.
*
* @param w the photo width (pixels)
* @param h the photo height (pixels)
*/
public Size(int w, int h) {
width = w;
height = h;
}
/**
* Compares {@code obj} to this size.
*
* @param obj the object to compare this size with.
* @return {@code true} if the width and height of {@code obj} is the
* same as those of this size. {@code false} otherwise.
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof Size)) {
return false;
}
Size s = (Size) obj;
return width == s.width && height == s.height;
}
@Override
public int hashCode() {
return width * 32713 + height;
}
/** width of the picture */
public int width;
/** height of the picture */
public int height;
};
/**
* Camera service settings.
*
* <p>To make camera parameters take effect, applications have to call
* {@link Camera#setParameters(Camera.Parameters)}. For example, after
* {@link Camera.Parameters#setWhiteBalance} is called, white balance is not
* actually changed until {@link Camera#setParameters(Camera.Parameters)}
* is called with the changed parameters object.
*
* <p>Different devices may have different camera capabilities, such as
* picture size or flash modes. The application should query the camera
* capabilities before setting parameters. For example, the application
* should call {@link Camera.Parameters#getSupportedColorEffects()} before
* calling {@link Camera.Parameters#setColorEffect(String)}. If the
* camera does not support color effects,
* {@link Camera.Parameters#getSupportedColorEffects()} will return null.
*/
public class Parameters {
// Parameter keys to communicate with the camera driver.
private static final String KEY_PREVIEW_SIZE = "preview-size";
private static final String KEY_PREVIEW_FORMAT = "preview-format";
private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate";
private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range";
private static final String KEY_PICTURE_SIZE = "picture-size";
private static final String KEY_PICTURE_FORMAT = "picture-format";
private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size";
private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width";
private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height";
private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality";
private static final String KEY_JPEG_QUALITY = "jpeg-quality";
private static final String KEY_ROTATION = "rotation";
private static final String KEY_GPS_LATITUDE = "gps-latitude";
private static final String KEY_GPS_LONGITUDE = "gps-longitude";
private static final String KEY_GPS_ALTITUDE = "gps-altitude";
private static final String KEY_GPS_TIMESTAMP = "gps-timestamp";
private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method";
private static final String KEY_WHITE_BALANCE = "whitebalance";
private static final String KEY_EFFECT = "effect";
private static final String KEY_ANTIBANDING = "antibanding";
private static final String KEY_SCENE_MODE = "scene-mode";
private static final String KEY_FLASH_MODE = "flash-mode";
private static final String KEY_FOCUS_MODE = "focus-mode";
private static final String KEY_FOCAL_LENGTH = "focal-length";
private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle";
private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle";
private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation";
private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation";
private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation";
private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step";
private static final String KEY_ZOOM = "zoom";
private static final String KEY_MAX_ZOOM = "max-zoom";
private static final String KEY_ZOOM_RATIOS = "zoom-ratios";
private static final String KEY_ZOOM_SUPPORTED = "zoom-supported";
private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported";
private static final String KEY_FOCUS_DISTANCES = "focus-distances";
// Parameter key suffix for supported values.
private static final String SUPPORTED_VALUES_SUFFIX = "-values";
private static final String TRUE = "true";
// Values for white balance settings.
public static final String WHITE_BALANCE_AUTO = "auto";
public static final String WHITE_BALANCE_INCANDESCENT = "incandescent";
public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent";
public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent";
public static final String WHITE_BALANCE_DAYLIGHT = "daylight";
public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight";
public static final String WHITE_BALANCE_TWILIGHT = "twilight";
public static final String WHITE_BALANCE_SHADE = "shade";
// Values for color effect settings.
public static final String EFFECT_NONE = "none";
public static final String EFFECT_MONO = "mono";
public static final String EFFECT_NEGATIVE = "negative";
public static final String EFFECT_SOLARIZE = "solarize";
public static final String EFFECT_SEPIA = "sepia";
public static final String EFFECT_POSTERIZE = "posterize";
public static final String EFFECT_WHITEBOARD = "whiteboard";
public static final String EFFECT_BLACKBOARD = "blackboard";
public static final String EFFECT_AQUA = "aqua";
// Values for antibanding settings.
public static final String ANTIBANDING_AUTO = "auto";
public static final String ANTIBANDING_50HZ = "50hz";
public static final String ANTIBANDING_60HZ = "60hz";
public static final String ANTIBANDING_OFF = "off";
// Values for flash mode settings.
/**
* Flash will not be fired.
*/
public static final String FLASH_MODE_OFF = "off";
/**
* Flash will be fired automatically when required. The flash may be fired
* during preview, auto-focus, or snapshot depending on the driver.
*/
public static final String FLASH_MODE_AUTO = "auto";
/**
* Flash will always be fired during snapshot. The flash may also be
* fired during preview or auto-focus depending on the driver.
*/
public static final String FLASH_MODE_ON = "on";
/**
* Flash will be fired in red-eye reduction mode.
*/
public static final String FLASH_MODE_RED_EYE = "red-eye";
/**
* Constant emission of light during preview, auto-focus and snapshot.
* This can also be used for video recording.
*/
public static final String FLASH_MODE_TORCH = "torch";
/**
* Scene mode is off.
*/
public static final String SCENE_MODE_AUTO = "auto";
/**
* Take photos of fast moving objects. Same as {@link
* #SCENE_MODE_SPORTS}.
*/
public static final String SCENE_MODE_ACTION = "action";
/**
* Take people pictures.
*/
public static final String SCENE_MODE_PORTRAIT = "portrait";
/**
* Take pictures on distant objects.
*/
public static final String SCENE_MODE_LANDSCAPE = "landscape";
/**
* Take photos at night.
*/
public static final String SCENE_MODE_NIGHT = "night";
/**
* Take people pictures at night.
*/
public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait";
/**
* Take photos in a theater. Flash light is off.
*/
public static final String SCENE_MODE_THEATRE = "theatre";
/**
* Take pictures on the beach.
*/
public static final String SCENE_MODE_BEACH = "beach";
/**
* Take pictures on the snow.
*/
public static final String SCENE_MODE_SNOW = "snow";
/**
* Take sunset photos.
*/
public static final String SCENE_MODE_SUNSET = "sunset";
/**
* Avoid blurry pictures (for example, due to hand shake).
*/
public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto";
/**
* For shooting firework displays.
*/
public static final String SCENE_MODE_FIREWORKS = "fireworks";
/**
* Take photos of fast moving objects. Same as {@link
* #SCENE_MODE_ACTION}.
*/
public static final String SCENE_MODE_SPORTS = "sports";
/**
* Take indoor low-light shot.
*/
public static final String SCENE_MODE_PARTY = "party";
/**
* Capture the naturally warm color of scenes lit by candles.
*/
public static final String SCENE_MODE_CANDLELIGHT = "candlelight";
/**
* Applications are looking for a barcode. Camera driver will be
* optimized for barcode reading.
*/
public static final String SCENE_MODE_BARCODE = "barcode";
/**
* Auto-focus mode. Applications should call {@link
* #autoFocus(AutoFocusCallback)} to start the focus in this mode.
*/
public static final String FOCUS_MODE_AUTO = "auto";
/**
* Focus is set at infinity. Applications should not call
* {@link #autoFocus(AutoFocusCallback)} in this mode.
*/
public static final String FOCUS_MODE_INFINITY = "infinity";
/**
* Macro (close-up) focus mode. Applications should call
* {@link #autoFocus(AutoFocusCallback)} to start the focus in this
* mode.
*/
public static final String FOCUS_MODE_MACRO = "macro";
/**
* Focus is fixed. The camera is always in this mode if the focus is not
* adjustable. If the camera has auto-focus, this mode can fix the
* focus, which is usually at hyperfocal distance. Applications should
* not call {@link #autoFocus(AutoFocusCallback)} in this mode.
*/
public static final String FOCUS_MODE_FIXED = "fixed";
/**
* Extended depth of field (EDOF). Focusing is done digitally and
* continuously. Applications should not call {@link
* #autoFocus(AutoFocusCallback)} in this mode.
*/
public static final String FOCUS_MODE_EDOF = "edof";
/**
* Continuous auto focus mode intended for video recording. The camera
* continuously tries to focus. This is ideal for shooting video.
* Applications still can call {@link
* #takePicture(Camera.ShutterCallback, Camera.PictureCallback,
* Camera.PictureCallback)} in this mode but the subject may not be in
* focus. Auto focus starts when the parameter is set. Applications
* should not call {@link #autoFocus(AutoFocusCallback)} in this mode.
* To stop continuous focus, applications should change the focus mode
* to other modes.
*/
public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video";
// Indices for focus distance array.
/**
* The array index of near focus distance for use with
* {@link #getFocusDistances(float[])}.
*/
public static final int FOCUS_DISTANCE_NEAR_INDEX = 0;
/**
* The array index of optimal focus distance for use with
* {@link #getFocusDistances(float[])}.
*/
public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1;
/**
* The array index of far focus distance for use with
* {@link #getFocusDistances(float[])}.
*/
public static final int FOCUS_DISTANCE_FAR_INDEX = 2;
/**
* The array index of minimum preview fps for use with {@link
* #getPreviewFpsRange(int[])} or {@link
* #getSupportedPreviewFpsRange()}.
*/
public static final int PREVIEW_FPS_MIN_INDEX = 0;
/**
* The array index of maximum preview fps for use with {@link
* #getPreviewFpsRange(int[])} or {@link
* #getSupportedPreviewFpsRange()}.
*/
public static final int PREVIEW_FPS_MAX_INDEX = 1;
// Formats for setPreviewFormat and setPictureFormat.
private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp";
private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp";
private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv";
private static final String PIXEL_FORMAT_RGB565 = "rgb565";
private static final String PIXEL_FORMAT_JPEG = "jpeg";
private HashMap<String, String> mMap;
private Parameters() {
mMap = new HashMap<String, String>();
}
/**
* Writes the current Parameters to the log.
* @hide
* @deprecated
*/
public void dump() {
Log.e(TAG, "dump: size=" + mMap.size());
for (String k : mMap.keySet()) {
Log.e(TAG, "dump: " + k + "=" + mMap.get(k));
}
}
/**
* Creates a single string with all the parameters set in
* this Parameters object.
* <p>The {@link #unflatten(String)} method does the reverse.</p>
*
* @return a String with all values from this Parameters object, in
* semi-colon delimited key-value pairs
*/
public String flatten() {
StringBuilder flattened = new StringBuilder();
for (String k : mMap.keySet()) {
flattened.append(k);
flattened.append("=");
flattened.append(mMap.get(k));
flattened.append(";");
}
// chop off the extra semicolon at the end
flattened.deleteCharAt(flattened.length()-1);
return flattened.toString();
}
/**
* Takes a flattened string of parameters and adds each one to
* this Parameters object.
* <p>The {@link #flatten()} method does the reverse.</p>
*
* @param flattened a String of parameters (key-value paired) that
* are semi-colon delimited
*/
public void unflatten(String flattened) {
mMap.clear();
StringTokenizer tokenizer = new StringTokenizer(flattened, ";");
while (tokenizer.hasMoreElements()) {
String kv = tokenizer.nextToken();
int pos = kv.indexOf('=');
if (pos == -1) {
continue;
}
String k = kv.substring(0, pos);
String v = kv.substring(pos + 1);
mMap.put(k, v);
}
}
public void remove(String key) {
mMap.remove(key);
}
/**
* Sets a String parameter.
*
* @param key the key name for the parameter
* @param value the String value of the parameter
*/
public void set(String key, String value) {
if (key.indexOf('=') != -1 || key.indexOf(';') != -1) {
Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)");
return;
}
if (value.indexOf('=') != -1 || value.indexOf(';') != -1) {
Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)");
return;
}
mMap.put(key, value);
}
/**
* Sets an integer parameter.
*
* @param key the key name for the parameter
* @param value the int value of the parameter
*/
public void set(String key, int value) {
mMap.put(key, Integer.toString(value));
}
/**
* Returns the value of a String parameter.
*
* @param key the key name for the parameter
* @return the String value of the parameter
*/
public String get(String key) {
return mMap.get(key);
}
/**
* Returns the value of an integer parameter.
*
* @param key the key name for the parameter
* @return the int value of the parameter
*/
public int getInt(String key) {
return Integer.parseInt(mMap.get(key));
}
/**
* Sets the dimensions for preview pictures.
*
* The sides of width and height are based on camera orientation. That
* is, the preview size is the size before it is rotated by display
* orientation. So applications need to consider the display orientation
* while setting preview size. For example, suppose the camera supports
* both 480x320 and 320x480 preview sizes. The application wants a 3:2
* preview ratio. If the display orientation is set to 0 or 180, preview
* size should be set to 480x320. If the display orientation is set to
* 90 or 270, preview size should be set to 320x480. The display
* orientation should also be considered while setting picture size and
* thumbnail size.
*
* @param width the width of the pictures, in pixels
* @param height the height of the pictures, in pixels
* @see #setDisplayOrientation(int)
* @see #getCameraInfo(int, CameraInfo)
* @see #setPictureSize(int, int)
* @see #setJpegThumbnailSize(int, int)
*/
public void setPreviewSize(int width, int height) {
String v = Integer.toString(width) + "x" + Integer.toString(height);
set(KEY_PREVIEW_SIZE, v);
}
/**
* Returns the dimensions setting for preview pictures.
*
* @return a Size object with the height and width setting
* for the preview picture
*/
public Size getPreviewSize() {
String pair = get(KEY_PREVIEW_SIZE);
return strToSize(pair);
}
/**
* Gets the supported preview sizes.
*
* @return a list of Size object. This method will always return a list
* with at least one element.
*/
public List<Size> getSupportedPreviewSizes() {
String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX);
return splitSize(str);
}
/**
* Sets the dimensions for EXIF thumbnail in Jpeg picture. If
* applications set both width and height to 0, EXIF will not contain
* thumbnail.
*
* Applications need to consider the display orientation. See {@link
* #setPreviewSize(int,int)} for reference.
*
* @param width the width of the thumbnail, in pixels
* @param height the height of the thumbnail, in pixels
* @see #setPreviewSize(int,int)
*/
public void setJpegThumbnailSize(int width, int height) {
set(KEY_JPEG_THUMBNAIL_WIDTH, width);
set(KEY_JPEG_THUMBNAIL_HEIGHT, height);
}
/**
* Returns the dimensions for EXIF thumbnail in Jpeg picture.
*
* @return a Size object with the height and width setting for the EXIF
* thumbnails
*/
public Size getJpegThumbnailSize() {
return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH),
getInt(KEY_JPEG_THUMBNAIL_HEIGHT));
}
/**
* Gets the supported jpeg thumbnail sizes.
*
* @return a list of Size object. This method will always return a list
* with at least two elements. Size 0,0 (no thumbnail) is always
* supported.
*/
public List<Size> getSupportedJpegThumbnailSizes() {
String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX);
return splitSize(str);
}
/**
* Sets the quality of the EXIF thumbnail in Jpeg picture.
*
* @param quality the JPEG quality of the EXIF thumbnail. The range is 1
* to 100, with 100 being the best.
*/
public void setJpegThumbnailQuality(int quality) {
set(KEY_JPEG_THUMBNAIL_QUALITY, quality);
}
/**
* Returns the quality setting for the EXIF thumbnail in Jpeg picture.
*
* @return the JPEG quality setting of the EXIF thumbnail.
*/
public int getJpegThumbnailQuality() {
return getInt(KEY_JPEG_THUMBNAIL_QUALITY);
}
/**
* Sets Jpeg quality of captured picture.
*
* @param quality the JPEG quality of captured picture. The range is 1
* to 100, with 100 being the best.
*/
public void setJpegQuality(int quality) {
set(KEY_JPEG_QUALITY, quality);
}
/**
* Returns the quality setting for the JPEG picture.
*
* @return the JPEG picture quality setting.
*/
public int getJpegQuality() {
return getInt(KEY_JPEG_QUALITY);
}
/**
* Sets the rate at which preview frames are received. This is the
* target frame rate. The actual frame rate depends on the driver.
*
* @param fps the frame rate (frames per second)
* @deprecated replaced by {@link #setPreviewFpsRange(int,int)}
*/
@Deprecated
public void setPreviewFrameRate(int fps) {
set(KEY_PREVIEW_FRAME_RATE, fps);
}
/**
* Returns the setting for the rate at which preview frames are
* received. This is the target frame rate. The actual frame rate
* depends on the driver.
*
* @return the frame rate setting (frames per second)
* @deprecated replaced by {@link #getPreviewFpsRange(int[])}
*/
@Deprecated
public int getPreviewFrameRate() {
return getInt(KEY_PREVIEW_FRAME_RATE);
}
/**
* Gets the supported preview frame rates.
*
* @return a list of supported preview frame rates. null if preview
* frame rate setting is not supported.
* @deprecated replaced by {@link #getSupportedPreviewFpsRange()}
*/
@Deprecated
public List<Integer> getSupportedPreviewFrameRates() {
String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX);
return splitInt(str);
}
/**
* Sets the maximum and maximum preview fps. This controls the rate of
* preview frames received in {@link PreviewCallback}. The minimum and
* maximum preview fps must be one of the elements from {@link
* #getSupportedPreviewFpsRange}.
*
* @param min the minimum preview fps (scaled by 1000).
* @param max the maximum preview fps (scaled by 1000).
* @throws RuntimeException if fps range is invalid.
* @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback)
* @see #getSupportedPreviewFpsRange()
*/
public void setPreviewFpsRange(int min, int max) {
set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max);
}
/**
* Returns the current minimum and maximum preview fps. The values are
* one of the elements returned by {@link #getSupportedPreviewFpsRange}.
*
* @return range the minimum and maximum preview fps (scaled by 1000).
* @see #PREVIEW_FPS_MIN_INDEX
* @see #PREVIEW_FPS_MAX_INDEX
* @see #getSupportedPreviewFpsRange()
*/
public void getPreviewFpsRange(int[] range) {
if (range == null || range.length != 2) {
throw new IllegalArgumentException(
"range must be an array with two elements.");
}
splitInt(get(KEY_PREVIEW_FPS_RANGE), range);
}
/**
* Gets the supported preview fps (frame-per-second) ranges. Each range
* contains a minimum fps and maximum fps. If minimum fps equals to
* maximum fps, the camera outputs frames in fixed frame rate. If not,
* the camera outputs frames in auto frame rate. The actual frame rate
* fluctuates between the minimum and the maximum. The values are
* multiplied by 1000 and represented in integers. For example, if frame
* rate is 26.623 frames per second, the value is 26623.
*
* @return a list of supported preview fps ranges. This method returns a
* list with at least one element. Every element is an int array
* of two values - minimum fps and maximum fps. The list is
* sorted from small to large (first by maximum fps and then
* minimum fps).
* @see #PREVIEW_FPS_MIN_INDEX
* @see #PREVIEW_FPS_MAX_INDEX
*/
public List<int[]> getSupportedPreviewFpsRange() {
String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX);
return splitRange(str);
}
/**
* Sets the image format for preview pictures.
* <p>If this is never called, the default format will be
* {@link android.graphics.ImageFormat#NV21}, which
* uses the NV21 encoding format.</p>
*
* @param pixel_format the desired preview picture format, defined
* by one of the {@link android.graphics.ImageFormat} constants.
* (E.g., <var>ImageFormat.NV21</var> (default),
* <var>ImageFormat.RGB_565</var>, or
* <var>ImageFormat.JPEG</var>)
* @see android.graphics.ImageFormat
*/
public void setPreviewFormat(int pixel_format) {
String s = cameraFormatForPixelFormat(pixel_format);
if (s == null) {
throw new IllegalArgumentException(
"Invalid pixel_format=" + pixel_format);
}
set(KEY_PREVIEW_FORMAT, s);
}
/**
* Returns the image format for preview frames got from
* {@link PreviewCallback}.
*
* @return the preview format.
* @see android.graphics.ImageFormat
*/
public int getPreviewFormat() {
return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT));
}
/**
* Gets the supported preview formats.
*
* @return a list of supported preview formats. This method will always
* return a list with at least one element.
* @see android.graphics.ImageFormat
*/
public List<Integer> getSupportedPreviewFormats() {
String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX);
ArrayList<Integer> formats = new ArrayList<Integer>();
for (String s : split(str)) {
int f = pixelFormatForCameraFormat(s);
if (f == ImageFormat.UNKNOWN) continue;
formats.add(f);
}
return formats;
}
/**
* Sets the dimensions for pictures.
*
* Applications need to consider the display orientation. See {@link
* #setPreviewSize(int,int)} for reference.
*
* @param width the width for pictures, in pixels
* @param height the height for pictures, in pixels
* @see #setPreviewSize(int,int)
*
*/
public void setPictureSize(int width, int height) {
String v = Integer.toString(width) + "x" + Integer.toString(height);
set(KEY_PICTURE_SIZE, v);
}
/**
* Returns the dimension setting for pictures.
*
* @return a Size object with the height and width setting
* for pictures
*/
public Size getPictureSize() {
String pair = get(KEY_PICTURE_SIZE);
return strToSize(pair);
}
/**
* Gets the supported picture sizes.
*
* @return a list of supported picture sizes. This method will always
* return a list with at least one element.
*/
public List<Size> getSupportedPictureSizes() {
String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX);
return splitSize(str);
}
/**
* Sets the image format for pictures.
*
* @param pixel_format the desired picture format
* (<var>ImageFormat.NV21</var>,
* <var>ImageFormat.RGB_565</var>, or
* <var>ImageFormat.JPEG</var>)
* @see android.graphics.ImageFormat
*/
public void setPictureFormat(int pixel_format) {
String s = cameraFormatForPixelFormat(pixel_format);
if (s == null) {
throw new IllegalArgumentException(
"Invalid pixel_format=" + pixel_format);
}
set(KEY_PICTURE_FORMAT, s);
}
/**
* Returns the image format for pictures.
*
* @return the picture format
* @see android.graphics.ImageFormat
*/
public int getPictureFormat() {
return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT));
}
/**
* Gets the supported picture formats.
*
* @return supported picture formats. This method will always return a
* list with at least one element.
* @see android.graphics.ImageFormat
*/
public List<Integer> getSupportedPictureFormats() {
String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX);
ArrayList<Integer> formats = new ArrayList<Integer>();
for (String s : split(str)) {
int f = pixelFormatForCameraFormat(s);
if (f == ImageFormat.UNKNOWN) continue;
formats.add(f);
}
return formats;
}
private String cameraFormatForPixelFormat(int pixel_format) {
switch(pixel_format) {
case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP;
case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP;
case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I;
case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565;
case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG;
default: return null;
}
}
private int pixelFormatForCameraFormat(String format) {
if (format == null)
return ImageFormat.UNKNOWN;
if (format.equals(PIXEL_FORMAT_YUV422SP))
return ImageFormat.NV16;
if (format.equals(PIXEL_FORMAT_YUV420SP))
return ImageFormat.NV21;
if (format.equals(PIXEL_FORMAT_YUV422I))
return ImageFormat.YUY2;
if (format.equals(PIXEL_FORMAT_RGB565))
return ImageFormat.RGB_565;
if (format.equals(PIXEL_FORMAT_JPEG))
return ImageFormat.JPEG;
return ImageFormat.UNKNOWN;
}
/**
* Sets the rotation angle in degrees relative to the orientation of
* the camera. This affects the pictures returned from JPEG {@link
* PictureCallback}. The camera driver may set orientation in the
* EXIF header without rotating the picture. Or the driver may rotate
* the picture and the EXIF thumbnail. If the Jpeg picture is rotated,
* the orientation in the EXIF header will be missing or 1 (row #0 is
* top and column #0 is left side).
*
* <p>If applications want to rotate the picture to match the orientation
* of what users see, apps should use {@link
* android.view.OrientationEventListener} and {@link CameraInfo}.
* The value from OrientationEventListener is relative to the natural
* orientation of the device. CameraInfo.orientation is the angle
* between camera orientation and natural device orientation. The sum
* of the two is the rotation angle for back-facing camera. The
* difference of the two is the rotation angle for front-facing camera.
* Note that the JPEG pictures of front-facing cameras are not mirrored
* as in preview display.
*
* <p>For example, suppose the natural orientation of the device is
* portrait. The device is rotated 270 degrees clockwise, so the device
* orientation is 270. Suppose a back-facing camera sensor is mounted in
* landscape and the top side of the camera sensor is aligned with the
* right edge of the display in natural orientation. So the camera
* orientation is 90. The rotation should be set to 0 (270 + 90).
*
* <p>The reference code is as follows.
*
* <pre>
* public void public void onOrientationChanged(int orientation) {
* if (orientation == ORIENTATION_UNKNOWN) return;
* android.hardware.Camera.CameraInfo info =
* new android.hardware.Camera.CameraInfo();
* android.hardware.Camera.getCameraInfo(cameraId, info);
* orientation = (orientation + 45) / 90 * 90;
* int rotation = 0;
* if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
* rotation = (info.orientation - orientation + 360) % 360;
* } else { // back-facing camera
* rotation = (info.orientation + orientation) % 360;
* }
* mParameters.setRotation(rotation);
* }
* </pre>
*
* @param rotation The rotation angle in degrees relative to the
* orientation of the camera. Rotation can only be 0,
* 90, 180 or 270.
* @throws IllegalArgumentException if rotation value is invalid.
* @see android.view.OrientationEventListener
* @see #getCameraInfo(int, CameraInfo)
*/
public void setRotation(int rotation) {
if (rotation == 0 || rotation == 90 || rotation == 180
|| rotation == 270) {
set(KEY_ROTATION, Integer.toString(rotation));
} else {
throw new IllegalArgumentException(
"Invalid rotation=" + rotation);
}
}
/**
* Sets GPS latitude coordinate. This will be stored in JPEG EXIF
* header.
*
* @param latitude GPS latitude coordinate.
*/
public void setGpsLatitude(double latitude) {
set(KEY_GPS_LATITUDE, Double.toString(latitude));
}
/**
* Sets GPS longitude coordinate. This will be stored in JPEG EXIF
* header.
*
* @param longitude GPS longitude coordinate.
*/
public void setGpsLongitude(double longitude) {
set(KEY_GPS_LONGITUDE, Double.toString(longitude));
}
/**
* Sets GPS altitude. This will be stored in JPEG EXIF header.
*
* @param altitude GPS altitude in meters.
*/
public void setGpsAltitude(double altitude) {
set(KEY_GPS_ALTITUDE, Double.toString(altitude));
}
/**
* Sets GPS timestamp. This will be stored in JPEG EXIF header.
*
* @param timestamp GPS timestamp (UTC in seconds since January 1,
* 1970).
*/
public void setGpsTimestamp(long timestamp) {
set(KEY_GPS_TIMESTAMP, Long.toString(timestamp));
}
/**
* Sets GPS processing method. It will store up to 32 characters
* in JPEG EXIF header.
*
* @param processing_method The processing method to get this location.
*/
public void setGpsProcessingMethod(String processing_method) {
set(KEY_GPS_PROCESSING_METHOD, processing_method);
}
/**
* Removes GPS latitude, longitude, altitude, and timestamp from the
* parameters.
*/
public void removeGpsData() {
remove(KEY_GPS_LATITUDE);
remove(KEY_GPS_LONGITUDE);
remove(KEY_GPS_ALTITUDE);
remove(KEY_GPS_TIMESTAMP);
remove(KEY_GPS_PROCESSING_METHOD);
}
/**
* Gets the current white balance setting.
*
* @return current white balance. null if white balance setting is not
* supported.
* @see #WHITE_BALANCE_AUTO
* @see #WHITE_BALANCE_INCANDESCENT
* @see #WHITE_BALANCE_FLUORESCENT
* @see #WHITE_BALANCE_WARM_FLUORESCENT
* @see #WHITE_BALANCE_DAYLIGHT
* @see #WHITE_BALANCE_CLOUDY_DAYLIGHT
* @see #WHITE_BALANCE_TWILIGHT
* @see #WHITE_BALANCE_SHADE
*
*/
public String getWhiteBalance() {
return get(KEY_WHITE_BALANCE);
}
/**
* Sets the white balance.
*
* @param value new white balance.
* @see #getWhiteBalance()
*/
public void setWhiteBalance(String value) {
set(KEY_WHITE_BALANCE, value);
}
/**
* Gets the supported white balance.
*
* @return a list of supported white balance. null if white balance
* setting is not supported.
* @see #getWhiteBalance()
*/
public List<String> getSupportedWhiteBalance() {
String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current color effect setting.
*
* @return current color effect. null if color effect
* setting is not supported.
* @see #EFFECT_NONE
* @see #EFFECT_MONO
* @see #EFFECT_NEGATIVE
* @see #EFFECT_SOLARIZE
* @see #EFFECT_SEPIA
* @see #EFFECT_POSTERIZE
* @see #EFFECT_WHITEBOARD
* @see #EFFECT_BLACKBOARD
* @see #EFFECT_AQUA
*/
public String getColorEffect() {
return get(KEY_EFFECT);
}
/**
* Sets the current color effect setting.
*
* @param value new color effect.
* @see #getColorEffect()
*/
public void setColorEffect(String value) {
set(KEY_EFFECT, value);
}
/**
* Gets the supported color effects.
*
* @return a list of supported color effects. null if color effect
* setting is not supported.
* @see #getColorEffect()
*/
public List<String> getSupportedColorEffects() {
String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current antibanding setting.
*
* @return current antibanding. null if antibanding setting is not
* supported.
* @see #ANTIBANDING_AUTO
* @see #ANTIBANDING_50HZ
* @see #ANTIBANDING_60HZ
* @see #ANTIBANDING_OFF
*/
public String getAntibanding() {
return get(KEY_ANTIBANDING);
}
/**
* Sets the antibanding.
*
* @param antibanding new antibanding value.
* @see #getAntibanding()
*/
public void setAntibanding(String antibanding) {
set(KEY_ANTIBANDING, antibanding);
}
/**
* Gets the supported antibanding values.
*
* @return a list of supported antibanding values. null if antibanding
* setting is not supported.
* @see #getAntibanding()
*/
public List<String> getSupportedAntibanding() {
String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current scene mode setting.
*
* @return one of SCENE_MODE_XXX string constant. null if scene mode
* setting is not supported.
* @see #SCENE_MODE_AUTO
* @see #SCENE_MODE_ACTION
* @see #SCENE_MODE_PORTRAIT
* @see #SCENE_MODE_LANDSCAPE
* @see #SCENE_MODE_NIGHT
* @see #SCENE_MODE_NIGHT_PORTRAIT
* @see #SCENE_MODE_THEATRE
* @see #SCENE_MODE_BEACH
* @see #SCENE_MODE_SNOW
* @see #SCENE_MODE_SUNSET
* @see #SCENE_MODE_STEADYPHOTO
* @see #SCENE_MODE_FIREWORKS
* @see #SCENE_MODE_SPORTS
* @see #SCENE_MODE_PARTY
* @see #SCENE_MODE_CANDLELIGHT
*/
public String getSceneMode() {
return get(KEY_SCENE_MODE);
}
/**
* Sets the scene mode. Changing scene mode may override other
* parameters (such as flash mode, focus mode, white balance). For
* example, suppose originally flash mode is on and supported flash
* modes are on/off. In night scene mode, both flash mode and supported
* flash mode may be changed to off. After setting scene mode,
* applications should call getParameters to know if some parameters are
* changed.
*
* @param value scene mode.
* @see #getSceneMode()
*/
public void setSceneMode(String value) {
set(KEY_SCENE_MODE, value);
}
/**
* Gets the supported scene modes.
*
* @return a list of supported scene modes. null if scene mode setting
* is not supported.
* @see #getSceneMode()
*/
public List<String> getSupportedSceneModes() {
String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current flash mode setting.
*
* @return current flash mode. null if flash mode setting is not
* supported.
* @see #FLASH_MODE_OFF
* @see #FLASH_MODE_AUTO
* @see #FLASH_MODE_ON
* @see #FLASH_MODE_RED_EYE
* @see #FLASH_MODE_TORCH
*/
public String getFlashMode() {
return get(KEY_FLASH_MODE);
}
/**
* Sets the flash mode.
*
* @param value flash mode.
* @see #getFlashMode()
*/
public void setFlashMode(String value) {
set(KEY_FLASH_MODE, value);
}
/**
* Gets the supported flash modes.
*
* @return a list of supported flash modes. null if flash mode setting
* is not supported.
* @see #getFlashMode()
*/
public List<String> getSupportedFlashModes() {
String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the current focus mode setting.
*
* @return current focus mode. This method will always return a non-null
* value. Applications should call {@link
* #autoFocus(AutoFocusCallback)} to start the focus if focus
* mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO.
* @see #FOCUS_MODE_AUTO
* @see #FOCUS_MODE_INFINITY
* @see #FOCUS_MODE_MACRO
* @see #FOCUS_MODE_FIXED
* @see #FOCUS_MODE_EDOF
* @see #FOCUS_MODE_CONTINUOUS_VIDEO
*/
public String getFocusMode() {
return get(KEY_FOCUS_MODE);
}
/**
* Sets the focus mode.
*
* @param value focus mode.
* @see #getFocusMode()
*/
public void setFocusMode(String value) {
set(KEY_FOCUS_MODE, value);
}
/**
* Gets the supported focus modes.
*
* @return a list of supported focus modes. This method will always
* return a list with at least one element.
* @see #getFocusMode()
*/
public List<String> getSupportedFocusModes() {
String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX);
return split(str);
}
/**
* Gets the focal length (in millimeter) of the camera.
*
* @return the focal length. This method will always return a valid
* value.
*/
public float getFocalLength() {
return Float.parseFloat(get(KEY_FOCAL_LENGTH));
}
/**
* Gets the horizontal angle of view in degrees.
*
* @return horizontal angle of view. This method will always return a
* valid value.
*/
public float getHorizontalViewAngle() {
return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE));
}
/**
* Gets the vertical angle of view in degrees.
*
* @return vertical angle of view. This method will always return a
* valid value.
*/
public float getVerticalViewAngle() {
return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE));
}
/**
* Gets the current exposure compensation index.
*
* @return current exposure compensation index. The range is {@link
* #getMinExposureCompensation} to {@link
* #getMaxExposureCompensation}. 0 means exposure is not
* adjusted.
*/
public int getExposureCompensation() {
return getInt(KEY_EXPOSURE_COMPENSATION, 0);
}
/**
* Sets the exposure compensation index.
*
* @param value exposure compensation index. The valid value range is
* from {@link #getMinExposureCompensation} (inclusive) to {@link
* #getMaxExposureCompensation} (inclusive). 0 means exposure is
* not adjusted. Application should call
* getMinExposureCompensation and getMaxExposureCompensation to
* know if exposure compensation is supported.
*/
public void setExposureCompensation(int value) {
set(KEY_EXPOSURE_COMPENSATION, value);
}
/**
* Gets the maximum exposure compensation index.
*
* @return maximum exposure compensation index (>=0). If both this
* method and {@link #getMinExposureCompensation} return 0,
* exposure compensation is not supported.
*/
public int getMaxExposureCompensation() {
return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0);
}
/**
* Gets the minimum exposure compensation index.
*
* @return minimum exposure compensation index (<=0). If both this
* method and {@link #getMaxExposureCompensation} return 0,
* exposure compensation is not supported.
*/
public int getMinExposureCompensation() {
return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0);
}
/**
* Gets the exposure compensation step.
*
* @return exposure compensation step. Applications can get EV by
* multiplying the exposure compensation index and step. Ex: if
* exposure compensation index is -6 and step is 0.333333333, EV
* is -2.
*/
public float getExposureCompensationStep() {
return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0);
}
/**
* Gets current zoom value. This also works when smooth zoom is in
* progress. Applications should check {@link #isZoomSupported} before
* using this method.
*
* @return the current zoom value. The range is 0 to {@link
* #getMaxZoom}. 0 means the camera is not zoomed.
*/
public int getZoom() {
return getInt(KEY_ZOOM, 0);
}
/**
* Sets current zoom value. If the camera is zoomed (value > 0), the
* actual picture size may be smaller than picture size setting.
* Applications can check the actual picture size after picture is
* returned from {@link PictureCallback}. The preview size remains the
* same in zoom. Applications should check {@link #isZoomSupported}
* before using this method.
*
* @param value zoom value. The valid range is 0 to {@link #getMaxZoom}.
*/
public void setZoom(int value) {
set(KEY_ZOOM, value);
}
/**
* Returns true if zoom is supported. Applications should call this
* before using other zoom methods.
*
* @return true if zoom is supported.
*/
public boolean isZoomSupported() {
String str = get(KEY_ZOOM_SUPPORTED);
return TRUE.equals(str);
}
/**
* Gets the maximum zoom value allowed for snapshot. This is the maximum
* value that applications can set to {@link #setZoom(int)}.
* Applications should call {@link #isZoomSupported} before using this
* method. This value may change in different preview size. Applications
* should call this again after setting preview size.
*
* @return the maximum zoom value supported by the camera.
*/
public int getMaxZoom() {
return getInt(KEY_MAX_ZOOM, 0);
}
/**
* Gets the zoom ratios of all zoom values. Applications should check
* {@link #isZoomSupported} before using this method.
*
* @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is
* returned as 320. The number of elements is {@link
* #getMaxZoom} + 1. The list is sorted from small to large. The
* first element is always 100. The last element is the zoom
* ratio of the maximum zoom value.
*/
public List<Integer> getZoomRatios() {
return splitInt(get(KEY_ZOOM_RATIOS));
}
/**
* Returns true if smooth zoom is supported. Applications should call
* this before using other smooth zoom methods.
*
* @return true if smooth zoom is supported.
*/
public boolean isSmoothZoomSupported() {
String str = get(KEY_SMOOTH_ZOOM_SUPPORTED);
return TRUE.equals(str);
}
/**
* Gets the distances from the camera to where an object appears to be
* in focus. The object is sharpest at the optimal focus distance. The
* depth of field is the far focus distance minus near focus distance.
*
* Focus distances may change after calling {@link
* #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link
* #startPreview()}. Applications can call {@link #getParameters()}
* and this method anytime to get the latest focus distances. If the
* focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change
* from time to time.
*
* This method is intended to estimate the distance between the camera
* and the subject. After autofocus, the subject distance may be within
* near and far focus distance. However, the precision depends on the
* camera hardware, autofocus algorithm, the focus area, and the scene.
* The error can be large and it should be only used as a reference.
*
* Far focus distance >= optimal focus distance >= near focus distance.
* If the focus distance is infinity, the value will be
* Float.POSITIVE_INFINITY.
*
* @param output focus distances in meters. output must be a float
* array with three elements. Near focus distance, optimal focus
* distance, and far focus distance will be filled in the array.
* @see #FOCUS_DISTANCE_NEAR_INDEX
* @see #FOCUS_DISTANCE_OPTIMAL_INDEX
* @see #FOCUS_DISTANCE_FAR_INDEX
*/
public void getFocusDistances(float[] output) {
if (output == null || output.length != 3) {
throw new IllegalArgumentException(
"output must be an float array with three elements.");
}
splitFloat(get(KEY_FOCUS_DISTANCES), output);
}
// Splits a comma delimited string to an ArrayList of String.
// Return null if the passing string is null or the size is 0.
private ArrayList<String> split(String str) {
if (str == null) return null;
// Use StringTokenizer because it is faster than split.
StringTokenizer tokenizer = new StringTokenizer(str, ",");
ArrayList<String> substrings = new ArrayList<String>();
while (tokenizer.hasMoreElements()) {
substrings.add(tokenizer.nextToken());
}
return substrings;
}
// Splits a comma delimited string to an ArrayList of Integer.
// Return null if the passing string is null or the size is 0.
private ArrayList<Integer> splitInt(String str) {
if (str == null) return null;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
ArrayList<Integer> substrings = new ArrayList<Integer>();
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
substrings.add(Integer.parseInt(token));
}
if (substrings.size() == 0) return null;
return substrings;
}
private void splitInt(String str, int[] output) {
if (str == null) return;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
int index = 0;
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
output[index++] = Integer.parseInt(token);
}
}
// Splits a comma delimited string to an ArrayList of Float.
private void splitFloat(String str, float[] output) {
if (str == null) return;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
int index = 0;
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
output[index++] = Float.parseFloat(token);
}
}
// Returns the value of a float parameter.
private float getFloat(String key, float defaultValue) {
try {
return Float.parseFloat(mMap.get(key));
} catch (NumberFormatException ex) {
return defaultValue;
}
}
// Returns the value of a integer parameter.
private int getInt(String key, int defaultValue) {
try {
return Integer.parseInt(mMap.get(key));
} catch (NumberFormatException ex) {
return defaultValue;
}
}
// Splits a comma delimited string to an ArrayList of Size.
// Return null if the passing string is null or the size is 0.
private ArrayList<Size> splitSize(String str) {
if (str == null) return null;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
ArrayList<Size> sizeList = new ArrayList<Size>();
while (tokenizer.hasMoreElements()) {
Size size = strToSize(tokenizer.nextToken());
if (size != null) sizeList.add(size);
}
if (sizeList.size() == 0) return null;
return sizeList;
}
// Parses a string (ex: "480x320") to Size object.
// Return null if the passing string is null.
private Size strToSize(String str) {
if (str == null) return null;
int pos = str.indexOf('x');
if (pos != -1) {
String width = str.substring(0, pos);
String height = str.substring(pos + 1);
return new Size(Integer.parseInt(width),
Integer.parseInt(height));
}
Log.e(TAG, "Invalid size parameter string=" + str);
return null;
}
// Splits a comma delimited string to an ArrayList of int array.
// Example string: "(10000,26623),(10000,30000)". Return null if the
// passing string is null or the size is 0.
private ArrayList<int[]> splitRange(String str) {
if (str == null || str.charAt(0) != '('
|| str.charAt(str.length() - 1) != ')') {
Log.e(TAG, "Invalid range list string=" + str);
return null;
}
ArrayList<int[]> rangeList = new ArrayList<int[]>();
int endIndex, fromIndex = 1;
do {
int[] range = new int[2];
endIndex = str.indexOf("),(", fromIndex);
if (endIndex == -1) endIndex = str.length() - 1;
splitInt(str.substring(fromIndex, endIndex), range);
rangeList.add(range);
fromIndex = endIndex + 3;
} while (endIndex != str.length() - 1);
if (rangeList.size() == 0) return null;
return rangeList;
}
};
}
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