Android example source code file (Camera.java)
The Camera.java Android example source code/*
* 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 connect/disconnect with the camera service,
* set capture settings, start/stop preview, snap a picture, and retrieve
* frames for encoding for video.
* <p>There is no default constructor for this class. Use {@link #open()} to
* get a Camera object.</p>
*
* <p>In order to use 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>
* manifest element in order 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 class="caution">Caution: 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/ui/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 a new Camera object.
*/
public static Camera open() {
return new Camera();
}
Camera() {
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));
}
protected void finalize() {
native_release();
}
private native final void native_setup(Object camera_this);
private native final void native_release();
/**
* Disconnects and releases the Camera object resources.
* <p>It is recommended that you call this as soon as you're done with the
* Camera object.</p>
*/
public final void release() {
native_release();
}
/**
* Reconnect to the camera after passing it to MediaRecorder. To save
* setup/teardown time, a client of Camera can pass an initialized Camera
* object to a MediaRecorder to use for video recording. Once the
* MediaRecorder is done with the Camera, this method can be used to
* re-establish a connection with the camera hardware. NOTE: The Camera
* object must first be unlocked by the process that owns it before it
* can be connected to another process.
*
* @throws IOException if the method fails.
*/
public native final void reconnect() throws IOException;
/**
* Lock the camera to prevent other processes from accessing it. To save
* setup/teardown time, a client of Camera can pass an initialized Camera
* object to another process. This method is used to re-lock the Camera
* object prevent other processes from accessing it. By default, the
* Camera object is locked. Locking it again from the same process will
* have no effect. Attempting to lock it from another process if it has
* not been unlocked will fail.
*
* @throws RuntimeException if the method fails.
*/
public native final void lock();
/**
* Unlock the camera to allow another process to access it. To save
* setup/teardown time, a client of Camera can pass an initialized Camera
* object to another process. This method is used to unlock the Camera
* object before handing off the Camera object to the other process.
*
* @throws RuntimeException if the method fails.
*/
public native final void unlock();
/**
* Sets the SurfaceHolder to be used for a picture preview. If the surface
* changed since the last call, the screen will blank. Nothing happens
* if the same surface is re-set.
*
* @param holder the SurfaceHolder upon which to place the picture preview
* @throws IOException if the method fails.
*/
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);
/**
* Used to get a copy of each preview frame.
*/
public interface PreviewCallback
{
/**
* The callback that delivers the preview frames.
*
* @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);
};
/**
* Start drawing preview frames to the surface.
*/
public native final void startPreview();
/**
* Stop drawing preview frames to the surface.
*/
public native final void stopPreview();
/**
* Return current preview state.
*
* FIXME: Unhide before release
* @hide
*/
public native final boolean previewEnabled();
/**
* Can be called at any time to instruct the camera to use a callback for
* each preview frame in addition to displaying it.
*
* @param cb A callback object that receives a copy of each preview frame.
* Pass null to stop receiving callbacks at any time.
*/
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 retrieve a single preview frame, after which the
* callback is cleared.
*
* @param cb A callback object that receives a copy of the preview frame.
*/
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 which will get called as long as there are buffers in the
* preview buffer queue, which minimizes dynamic allocation of preview buffers.
*
* Apps must call addCallbackBuffer to explicitly register the buffers to use, or no callbacks
* will be received. addCallbackBuffer may be safely called before or after
* a call to setPreviewCallbackWithBuffer with a non-null callback parameter.
*
* The buffer queue will be cleared upon any calls to setOneShotPreviewCallback,
* setPreviewCallback, or to this method with a null callback parameter.
*
* @param cb A callback object that receives a copy of the preview frame. A null value will clear the queue.
*/
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 available buffer, buffer will be filled
* and it is 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 the buffers back when they finish the
* processing.
*
* The image format of the callback buffer can be read from {@link
* android.hardware.Camera.Parameters#getPreviewFormat()}. bitsPerPixel can
* be read from {@link android.graphics.ImageFormat#getBitsPerPixel(int)}.
* Preview width and height can be determined from getPreviewSize.
*
* Alternatively, a buffer from a previous callback may be passed in or used
* to determine the size of new preview frame buffers.
*
* @param callbackBuffer The buffer to register. Size should be width * height * bitsPerPixel / 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);
}
}
/**
* Handles the callback for the 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 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>
* manifest element.</p>
*/
public interface AutoFocusCallback
{
/**
* Callback for the camera auto focus. If the camera does not support
* auto-focus and autoFocus is called, onAutoFocus will be called
* immediately with success.
*
* @param success true if focus was successful, false if otherwise
* @param camera the Camera service object
*/
void onAutoFocus(boolean success, Camera camera);
};
/**
* Starts auto-focus function and registers a callback function to run when
* camera is focused. Only valid after startPreview() has been called.
* Applications should call {@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>
* 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.<p>
*
* @param cb the callback to run
*/
public final void autoFocus(AutoFocusCallback cb)
{
mAutoFocusCallback = cb;
native_autoFocus();
}
private native final void native_autoFocus();
/**
* Cancels auto-focus function. If the auto-focus is still in progress,
* this function will cancel it. Whether the auto-focus is in progress
* or not, this function will return the focus position to the default.
* If the camera does not support auto-focus, this is a no-op.
*/
public final void cancelAutoFocus()
{
mAutoFocusCallback = null;
native_cancelAutoFocus();
}
private native final void native_cancelAutoFocus();
/**
* An interface which contains a callback for the shutter closing after taking a picture.
*/
public interface ShutterCallback
{
/**
* Can be used to play a shutter sound as soon as the image has been captured, but before
* the data is available.
*/
void onShutter();
}
/**
* Handles the callback for when a picture is taken.
*/
public interface PictureCallback {
/**
* Callback for when a picture is taken.
*
* @param data a byte array of the picture data
* @param camera the Camera service object
*/
void onPictureTaken(byte[] data, Camera camera);
};
/**
* 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 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.
*
* This method will stop the preview. Applications should not call {@link
* #stopPreview()} before this. After jpeg callback is received,
* applications can call {@link #startPreview()} to restart the preview.
*
* @param shutter callback after the image is captured, may be null
* @param raw callback with raw image data, may be null
* @param jpeg callback with jpeg image data, may be null
*/
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.
*
* This method will stop the preview. Applications should not call {@link
* #stopPreview()} before this. After jpeg callback is received,
* applications can call {@link #startPreview()} to restart the preview.
*
* @param shutter callback after the image is captured, may be null
* @param raw callback with raw image data, may be null
* @param postview callback with postview image data, may be null
* @param jpeg callback with jpeg image data, may be 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. 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. Method onZoomChange will be called three times
* with zoom value 1, 2, and 3. The applications can call {@link
* #stopSmoothZoom} to stop the zoom earlier. The applications should not
* call startSmoothZoom again or change the zoom value before zoom stops. If
* the passing 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} is 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.
*/
public native final void startSmoothZoom(int value);
/**
* Stops the smooth zoom. The 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 display orientation. This affects the preview frames and the
* picture displayed after snapshot. This method is useful for portrait
* mode applications.
*
* This does not affect the order of byte array passed in
* {@link PreviewCallback#onPreviewFrame}. This method is not allowed to
* be called during preview.
*
* @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).
*/
public native final void setDisplayOrientation(int degrees);
/**
* Interface for a callback to be invoked when zoom value changes.
*/
public interface OnZoomChangeListener
{
/**
* Called when the zoom value has changed.
*
* @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
* @see #startSmoothZoom(int)
*/
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;
}
// These match the enum in include/ui/Camera.h
/** Unspecified camerar error. @see #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 #ErrorCallback */
public static final int CAMERA_ERROR_SERVER_DIED = 100;
/**
* Handles the camera error callback.
*/
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();
/**
* Sets the Parameters for pictures from this Camera service.
*
* @param params the Parameters to use for this Camera service
*/
public void setParameters(Parameters params) {
native_setParameters(params.flatten());
}
/**
* Returns the picture Parameters for this Camera service.
*/
public Parameters getParameters() {
Parameters p = new Parameters();
String s = native_getParameters();
p.unflatten(s);
return p;
}
/**
* Handles the picture size (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;
};
/**
* Handles the parameters for pictures created by a Camera service.
*
* <p>To make camera parameters take effect, applications have to call
* Camera.setParameters. For example, after setWhiteBalance is called, white
* balance is not changed until Camera.setParameters() is called.
*
* <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 getSupportedColorEffects before calling setEffect. If the
* camera does not support color effects, 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_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";
// 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";
// Values for scene mode settings.
public static final String SCENE_MODE_AUTO = "auto";
public static final String SCENE_MODE_ACTION = "action";
public static final String SCENE_MODE_PORTRAIT = "portrait";
public static final String SCENE_MODE_LANDSCAPE = "landscape";
public static final String SCENE_MODE_NIGHT = "night";
public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait";
public static final String SCENE_MODE_THEATRE = "theatre";
public static final String SCENE_MODE_BEACH = "beach";
public static final String SCENE_MODE_SNOW = "snow";
public static final String SCENE_MODE_SUNSET = "sunset";
public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto";
public static final String SCENE_MODE_FIREWORKS = "fireworks";
public static final String SCENE_MODE_SPORTS = "sports";
public static final String SCENE_MODE_PARTY = "party";
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";
// Values for focus mode settings.
/**
* Auto-focus 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";
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";
// 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.
*
* @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.
*
* @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.
*
* @param width the width of the pictures, in pixels
* @param height the height of the pictures, in pixels
*/
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.
*
* @param width the width of the thumbnail, in pixels
* @param height the height of the thumbnail, in pixels
*/
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)
*/
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)
*/
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.
*/
public List<Integer> getSupportedPreviewFrameRates() {
String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX);
return splitInt(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 (default),
* <var>ImageFormat.RGB_565, or
* <var>ImageFormat.JPEG)
* @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
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