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Added some comments to public methods.

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git-svn-id: https://zxing.googlecode.com/svn/trunk@1051 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
dswitkin 2009-09-11 16:11:47 +00:00
parent 7983309b66
commit 2b0d14963d
2 changed files with 39 additions and 3 deletions
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41
android/src/com/google/zxing/client/android/CameraManager.java
View file

@ -77,6 +77,9 @@ final class CameraManager {
}
};
/**
* Autofocus callbacks arrive here, and are dispatched to the Handler which requested them.
*/
private final Camera.AutoFocusCallback autoFocusCallback = new Camera.AutoFocusCallback() {
public void onAutoFocus(boolean success, Camera camera) {
if (autoFocusHandler != null) {
@ -88,12 +91,22 @@ final class CameraManager {
}
};
/**
* Initializes this static object with the Context of the calling Activity.
*
* @param context The Activity which wants to use the camera.
*/
public static void init(Context context) {
if (cameraManager == null) {
cameraManager = new CameraManager(context);
}
}
/**
* Gets the CameraManager singleton instance.
*
* @return A reference to the CameraManager singleton.
*/
public static CameraManager get() {
return cameraManager;
}
@ -105,6 +118,12 @@ final class CameraManager {
previewing = false;
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder The surface object which the camera will draw preview frames into.
* @throws IOException Indicates the camera driver failed to open.
*/
public void openDriver(SurfaceHolder holder) throws IOException {
if (camera == null) {
camera = Camera.open();
@ -119,6 +138,9 @@ final class CameraManager {
}
}
/**
* Closes the camera driver if still in use.
*/
public void closeDriver() {
if (camera != null) {
camera.release();
@ -126,6 +148,9 @@ final class CameraManager {
}
}
/**
* Asks the camera hardware to begin drawing preview frames to the screen.
*/
public void startPreview() {
if (camera != null && !previewing) {
camera.startPreview();
@ -133,6 +158,9 @@ final class CameraManager {
}
}
/**
* Tells the camera to stop drawing preview frames.
*/
public void stopPreview() {
if (camera != null && previewing) {
camera.setPreviewCallback(null);
@ -159,6 +187,12 @@ final class CameraManager {
}
}
/**
* Asks the camera hardware to perform an autofocus.
*
* @param handler The Handler to notify when the autofocus completes.
* @param message The message to deliver.
*/
public void requestAutoFocus(Handler handler, int message) {
if (camera != null && previewing) {
autoFocusHandler = handler;
@ -243,9 +277,10 @@ final class CameraManager {
}
/**
* Sets the camera up to take preview images which are used for both preview and decoding. We're
* counting on the default YUV420 semi-planar data. If that changes in the future, we'll need to
* specify it explicitly with setPreviewFormat().
* Sets the camera up to take preview images which are used for both preview and decoding.
* We detect the preview format here so that buildLuminanceSource() can build an appropriate
* LuminanceSource subclass. In the future we may want to force YUV420SP as it's the smallest,
* and the planar Y can be used for barcode scanning without a copy in some cases.
*/
private void setCameraParameters() {
Camera.Parameters parameters = camera.getParameters();

1
android/src/com/google/zxing/client/android/InterleavedYUV422LuminanceSource.java
View file

@ -131,6 +131,7 @@ public final class InterleavedYUV422LuminanceSource extends BaseLuminanceSource
return bitmap;
}
// Not currently needed.
@Override
public Bitmap renderFullColorBitmap(boolean halfSize) {
return null;