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onCameraFrame callback signature changed. CvCameraFame interface added.

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New interface allows to get one RGBA or Gray frame from camera or both in the same time;
New interface fixes data rase in samples also.
pull/402/head
Alexander Smorkalov 12 years ago
parent f608df9640
commit 3ef588b877
3 changed files with 75 additions and 45 deletions
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  1. 18
      modules/java/generator/src/java/android+CameraBridgeViewBase.java
  2. 62
      modules/java/generator/src/java/android+JavaCameraView.java
  3. 40
      modules/java/generator/src/java/android+NativeCameraView.java

18
modules/java/generator/src/java/android+CameraBridgeViewBase.java
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@ -6,7 +6,6 @@ import org.opencv.R;
import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.core.Size;
import org.opencv.highgui.Highgui;
import android.app.Activity;
import android.app.AlertDialog;
@ -44,7 +43,6 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
protected int mFrameHeight;
protected int mMaxHeight;
protected int mMaxWidth;
protected int mPreviewFormat = Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA;
protected int mCameraIndex = -1;
protected boolean mEnabled;
protected FpsMeter mFpsMeter = null;
@ -91,10 +89,15 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
* The returned values - is a modified frame which needs to be displayed on the screen.
* TODO: pass the parameters specifying the format of the frame (BPP, YUV or RGB and etc)
*/
public Mat onCameraFrame(Mat inputFrame);
public Mat onCameraFrame(CvCameraViewFrame inputFrame);
}
public interface CvCameraViewFrame {
public abstract Mat rgba();
public abstract Mat gray();
};
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
Log.d(TAG, "call surfaceChanged event");
synchronized(mSyncObject) {
@ -183,11 +186,6 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
mMaxHeight = maxHeight;
}
public void SetCaptureFormat(int format)
{
mPreviewFormat = format;
}
/**
* Called when mSyncObject lock is held
*/
@ -276,13 +274,13 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
* then displayed on the screen.
* @param frame - the current frame to be delivered
*/
protected void deliverAndDrawFrame(Mat frame) {
protected void deliverAndDrawFrame(CvCameraViewFrame frame) {
Mat modified;
if (mListener != null) {
modified = mListener.onCameraFrame(frame);
} else {
modified = frame;
modified = frame.rgba();
}
boolean bmpValid = true;

62
modules/java/generator/src/java/android+JavaCameraView.java
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@ -16,7 +16,6 @@ import android.view.SurfaceHolder;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.Size;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;
/**
@ -33,7 +32,6 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
private static final int MAGIC_TEXTURE_ID = 10;
private static final String TAG = "JavaCameraView";
private Mat mBaseMat;
private byte mBuffer[];
private Mat[] mFrameChain;
private int mChainIdx = 0;
@ -41,7 +39,7 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
private boolean mStopThread;
protected Camera mCamera;
protected JavaCameraFrame mCameraFrame;
private SurfaceTexture mSurfaceTexture;
public static class JavaCameraSizeAccessor implements ListItemAccessor {
@ -146,14 +144,14 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
mCamera.addCallbackBuffer(mBuffer);
mCamera.setPreviewCallbackWithBuffer(this);
mBaseMat = new Mat(mFrameHeight + (mFrameHeight/2), mFrameWidth, CvType.CV_8UC1);
mFrameChain = new Mat[2];
mFrameChain[0] = new Mat();
mFrameChain[1] = new Mat();
mFrameChain[0] = new Mat(mFrameHeight + (mFrameHeight/2), mFrameWidth, CvType.CV_8UC1);
mFrameChain[1] = new Mat(mFrameHeight + (mFrameHeight/2), mFrameWidth, CvType.CV_8UC1);
AllocateCache();
mCameraFrame = new JavaCameraFrame(mFrameChain[mChainIdx], mFrameWidth, mFrameHeight);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
mSurfaceTexture = new SurfaceTexture(MAGIC_TEXTURE_ID);
getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
@ -183,12 +181,12 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
mCamera.release();
}
mCamera = null;
if (mBaseMat != null)
mBaseMat.release();
if (mFrameChain != null) {
mFrameChain[0].release();
mFrameChain[1].release();
}
if (mCameraFrame != null)
mCameraFrame.release();
}
}
@ -242,13 +240,45 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
Log.i(TAG, "Frame size is " + frame.length);
synchronized (this)
{
mBaseMat.put(0, 0, frame);
mFrameChain[1 - mChainIdx].put(0, 0, frame);
this.notify();
}
if (mCamera != null)
mCamera.addCallbackBuffer(mBuffer);
}
private class JavaCameraFrame implements CvCameraViewFrame
{
public Mat gray() {
return mYuvFrameData.submat(0, mHeight, 0, mWidth);
}
public Mat rgba() {
Imgproc.cvtColor(mYuvFrameData, mRgba, Imgproc.COLOR_YUV2BGR_NV12, 4);
return mRgba;
}
public JavaCameraFrame(Mat Yuv420sp, int width, int height) {
super();
mWidth = width;
mHeight = height;
mYuvFrameData = Yuv420sp;
mRgba = new Mat(mHeight, mWidth, CvType.CV_8UC4);
}
public void release() {
mRgba.release();
}
private JavaCameraFrame(CvCameraViewFrame obj) {
}
private Mat mYuvFrameData;
private Mat mRgba;
private int mWidth;
private int mHeight;
};
private class CameraWorker implements Runnable {
public void run() {
@ -263,18 +293,8 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
}
if (!mStopThread) {
switch (mPreviewFormat) {
case Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA:
Imgproc.cvtColor(mBaseMat, mFrameChain[mChainIdx], Imgproc.COLOR_YUV2RGBA_NV21, 4);
break;
case Highgui.CV_CAP_ANDROID_GREY_FRAME:
mFrameChain[mChainIdx] = mBaseMat.submat(0, mFrameHeight, 0, mFrameWidth);
break;
default:
Log.e(TAG, "Invalid frame format! Only RGBA and Gray Scale are supported!");
};
if (!mFrameChain[mChainIdx].empty())
deliverAndDrawFrame(mFrameChain[mChainIdx]);
deliverAndDrawFrame(mCameraFrame);
mChainIdx = 1 - mChainIdx;
}
} while (!mStopThread);

40
modules/java/generator/src/java/android+NativeCameraView.java
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@ -125,6 +125,31 @@ public class NativeCameraView extends CameraBridgeViewBase {
}
}
private class NativeCameraFrame implements CvCameraViewFrame {
@Override
public Mat rgba() {
mCamera.retrieve(mRgba, Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA);
return mRgba;
}
@Override
public Mat gray() {
mCamera.retrieve(mGray, Highgui.CV_CAP_ANDROID_GREY_FRAME);
return mGray;
}
public NativeCameraFrame(VideoCapture capture) {
mCapture = capture;
mGray = new Mat();
mRgba = new Mat();
}
private VideoCapture mCapture;
private Mat mRgba;
private Mat mGray;
};
private class CameraWorker implements Runnable {
private Mat mRgba = new Mat();
@ -137,22 +162,9 @@ public class NativeCameraView extends CameraBridgeViewBase {
break;
}
switch (mPreviewFormat) {
case Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA:
{
mCamera.retrieve(mRgba, Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA);
deliverAndDrawFrame(mRgba);
} break;
case Highgui.CV_CAP_ANDROID_GREY_FRAME:
mCamera.retrieve(mGray, Highgui.CV_CAP_ANDROID_GREY_FRAME);
deliverAndDrawFrame(mGray);
break;
default:
Log.e(TAG, "Invalid frame format! Only RGBA and Gray Scale are supported!");
}
deliverAndDrawFrame(new NativeCameraFrame(mCamera));
} while (!mStopThread);
}
}

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