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Unhide camera face detection API.

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bug:4460717
Change-Id: I8d72b0ada370acd6267c47deb654bb4bf1cfb538
This commit is contained in:
Wu-cheng Li
2011-08-04 00:11:00 +08:00
parent 50d3c667eb
commit c0c683b334
2 changed files with 37 additions and 73 deletions
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14
api/current.txt
View File

@@ -9097,6 +9097,7 @@ package android.hardware {
method public final void release();
method public final void setDisplayOrientation(int);
method public final void setErrorCallback(android.hardware.Camera.ErrorCallback);
method public final void setFaceDetectionListener(android.hardware.Camera.FaceDetectionListener);
method public final void setOneShotPreviewCallback(android.hardware.Camera.PreviewCallback);
method public void setParameters(android.hardware.Camera.Parameters);
method public final void setPreviewCallback(android.hardware.Camera.PreviewCallback);
@@ -9104,8 +9105,10 @@ package android.hardware {
method public final void setPreviewDisplay(android.view.SurfaceHolder) throws java.io.IOException;
method public final void setPreviewTexture(android.graphics.SurfaceTexture) throws java.io.IOException;
method public final void setZoomChangeListener(android.hardware.Camera.OnZoomChangeListener);
method public final void startFaceDetection();
method public final void startPreview();
method public final void startSmoothZoom(int);
method public final void stopFaceDetection();
method public final void stopPreview();
method public final void stopSmoothZoom();
method public final void takePicture(android.hardware.Camera.ShutterCallback, android.hardware.Camera.PictureCallback, android.hardware.Camera.PictureCallback);
@@ -9139,6 +9142,16 @@ package android.hardware {
method public abstract void onError(int, android.hardware.Camera);
}
public static class Camera.Face {
ctor public Camera.Face();
field public android.graphics.Rect rect;
field public int score;
}
public static abstract interface Camera.FaceDetectionListener {
method public abstract void onFaceDetection(android.hardware.Camera.Face[], android.hardware.Camera);
}
public static abstract interface Camera.OnZoomChangeListener {
method public abstract void onZoomChange(int, boolean, android.hardware.Camera);
}
@@ -9163,6 +9176,7 @@ package android.hardware {
method public int getJpegThumbnailQuality();
method public android.hardware.Camera.Size getJpegThumbnailSize();
method public int getMaxExposureCompensation();
method public int getMaxNumDetectedFaces();
method public int getMaxNumFocusAreas();
method public int getMaxNumMeteringAreas();
method public int getMaxZoom();

96
core/java/android/hardware/Camera.java
View File

@@ -167,22 +167,13 @@ public class Camera {
/**
* Hardware face detection. It does not use much CPU.
*
* @see #startFaceDetection(int)
* @see Parameters#getMaxNumDetectedFaces(int)
* @see #CAMERA_FACE_DETECTION_SW
* @hide
*/
public static final int CAMERA_FACE_DETECTION_HW = 0;
private static final int CAMERA_FACE_DETECTION_HW = 0;
/**
* Software face detection. It uses some CPU. Applications must use
* {@link #setPreviewTexture(SurfaceTexture)} for preview in this mode.
*
* @see #CAMERA_FACE_DETECTION_HW
* @hide
* Software face detection. It uses some CPU.
*/
public static final int CAMERA_FACE_DETECTION_SW = 1;
private static final int CAMERA_FACE_DETECTION_SW = 1;
/**
* Returns the number of physical cameras available on this device.
@@ -1071,7 +1062,6 @@ public class Camera {
/**
* Callback interface for face detected in the preview frame.
*
* @hide
*/
public interface FaceDetectionListener
{
@@ -1086,12 +1076,11 @@ public class Camera {
}
/**
* Registers a listener to be notified about the face detected of the
* Registers a listener to be notified about the faces detected in the
* preview frame.
*
* @param listener the listener to notify
* @see #startFaceDetection(int)
* @hide
* @see #startFaceDetection()
*/
public final void setFaceDetectionListener(FaceDetectionListener listener)
{
@@ -1099,48 +1088,37 @@ public class Camera {
}
/**
* Start the face detection. This should be called after preview is started.
* Starts the face detection. This should be called after preview is started.
* The camera will notify {@link FaceDetectionListener} of the detected
* faces in the preview frame. The detected faces may be the same as the
* previous ones. Applications should call {@link #stopFaceDetection} to
* stop the face detection. This method is supported if {@link
* Parameters#getMaxNumDetectedFaces(int)} returns a number larger than 0.
* Hardware and software face detection cannot be used at the same time.
* Parameters#getMaxNumDetectedFaces()} returns a number larger than 0.
* If the face detection has started, apps should not call this again.
*
* In hardware face detection mode, {@link Parameters#setWhiteBalance(String)},
* When the face detection is running, {@link Parameters#setWhiteBalance(String)},
* {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)}
* have no effect.
*
* @param type face detection type. This can be either {@link
* #CAMERA_FACE_DETECTION_HW} or {@link #CAMERA_FACE_DETECTION_SW}
* @throws IllegalArgumentException if the face detection type is
* unsupported or invalid.
* @throws IllegalArgumentException if the face detection is unsupported.
* @throws RuntimeException if the method fails or the face detection is
* already running.
* @see #CAMERA_FACE_DETECTION_HW
* @see #CAMERA_FACE_DETECTION_SW
* @see FaceDetectionListener
* @see #stopFaceDetection()
* @see Parameters#getMaxNumDetectedFaces(int)
* @hide
* @see Parameters#getMaxNumDetectedFaces()
*/
public final void startFaceDetection(int type) {
if (type != CAMERA_FACE_DETECTION_HW && type != CAMERA_FACE_DETECTION_SW) {
throw new IllegalArgumentException("Invalid face detection type " + type);
}
public final void startFaceDetection() {
if (mFaceDetectionRunning) {
throw new RuntimeException("Face detection is already running");
}
_startFaceDetection(type);
_startFaceDetection(CAMERA_FACE_DETECTION_HW);
mFaceDetectionRunning = true;
}
/**
* Stop the face detection.
* Stops the face detection.
*
* @see #startFaceDetection(int)
* @hide
*/
public final void stopFaceDetection() {
_stopFaceDetection();
@@ -1153,17 +1131,21 @@ public class Camera {
/**
* The information of a face from camera face detection.
*
* @hide
*/
public static class Face {
/**
* Create an empty face.
*/
public Face() {
}
/**
* Bounds of the face. (-1000, -1000) represents the top-left of the
* camera field of view, and (1000, 1000) represents the bottom-right of
* the field of view. The width and height cannot be 0 or negative. This
* is supported by both hardware and software face detection.
* the field of view. For example, suppose the size of the viewfinder UI
* is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0).
* The corresponding viewfinder rect should be (0, 0, 400, 240). The
* width and height of the rect will not be 0 or negative.
*
* <p>The direction is relative to the sensor orientation, that is, what
* the sensor sees. The direction is not affected by the rotation or
@@ -1175,37 +1157,11 @@ public class Camera {
/**
* The confidence level of the face. The range is 1 to 100. 100 is the
* highest confidence. This is supported by both hardware and software
* face detction.
* highest confidence.
*
* @see #startFaceDetection(int)
*/
public int score;
/**
* An unique id per face while the face is visible to the tracker. If
* the face leaves the field-of-view and comes back, it will get a new
* id. If the value is 0, id is not supported.
*/
public int id;
/**
* The coordinates of the center of the left eye. The range is -1000 to
* 1000. null if this is not supported.
*/
public Point leftEye;
/**
* The coordinates of the center of the right eye. The range is -1000 to
* 1000. null if this is not supported.
*/
public Point rightEye;
/**
* The coordinates of the center of the mouth. The range is -1000 to
* 1000. null if this is not supported.
*/
public Point mouth;
}
// Error codes match the enum in include/ui/Camera.h
@@ -3167,15 +3123,9 @@ public class Camera {
*
* @return the maximum number of detected face supported by the camera.
* @see #startFaceDetection(int)
* @hide
*/
public int getMaxNumDetectedFaces(int type) {
if (type == CAMERA_FACE_DETECTION_HW) {
return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0);
} else if (type == CAMERA_FACE_DETECTION_SW){
return getInt(KEY_MAX_NUM_DETECTED_FACES_SW, 0);
}
throw new IllegalArgumentException("Invalid face detection type " + type);
public int getMaxNumDetectedFaces() {
return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0);
}
/**