public void run() {
Log.i(TAG, "Starting processing thread");
mFps.init();
while (true) {
Bitmap bmp = null;
synchronized (this) {
if (mCamera == null) break;
if (!mCamera.grab()) {
Log.e(TAG, "mCamera.grab() failed");
break;
}
bmp = processFrame(mCamera);
mFps.measure();
}
if (bmp != null) {
Canvas canvas = mHolder.lockCanvas();
if (canvas != null) {
canvas.drawBitmap(
bmp,
(canvas.getWidth() - bmp.getWidth()) / 2,
(canvas.getHeight() - bmp.getHeight()) / 2,
null);
mFps.draw(canvas, (canvas.getWidth() - bmp.getWidth()) / 2, 0);
mHolder.unlockCanvasAndPost(canvas);
}
bmp.recycle();
}
}
Log.i(TAG, "Finishing processing thread");
}
/**
* This method shall be called by the subclasses when they have valid object and want it to be
* delivered to external client (via callback) and then displayed on the screen.
*
* @param frame - the current frame to be delivered
*/
protected void deliverAndDrawFrame(CvCameraViewFrame frame) {
Mat modified;
if (mListener != null) {
modified = mListener.onCameraFrame(frame);
} else {
modified = frame.rgba();
}
boolean bmpValid = true;
if (modified != null) {
try {
Utils.matToBitmap(modified, mCacheBitmap);
} catch (Exception e) {
Log.e(TAG, "Mat type: " + modified);
Log.e(TAG, "Bitmap type: " + mCacheBitmap.getWidth() + "*" + mCacheBitmap.getHeight());
Log.e(TAG, "Utils.matToBitmap() throws an exception: " + e.getMessage());
bmpValid = false;
}
}
if (bmpValid && mCacheBitmap != null) {
Canvas canvas = getHolder().lockCanvas();
if (canvas != null) {
canvas.drawColor(0, android.graphics.PorterDuff.Mode.CLEAR);
Log.d(TAG, "mStretch value: " + mScale);
if (mScale != 0) {
canvas.drawBitmap(
mCacheBitmap,
new Rect(0, 0, mCacheBitmap.getWidth(), mCacheBitmap.getHeight()),
new Rect(
(int) ((canvas.getWidth() - mScale * mCacheBitmap.getWidth()) / 2),
(int) ((canvas.getHeight() - mScale * mCacheBitmap.getHeight()) / 2),
(int)
((canvas.getWidth() - mScale * mCacheBitmap.getWidth()) / 2
+ mScale * mCacheBitmap.getWidth()),
(int)
((canvas.getHeight() - mScale * mCacheBitmap.getHeight()) / 2
+ mScale * mCacheBitmap.getHeight())),
null);
} else {
canvas.drawBitmap(
mCacheBitmap,
new Rect(0, 0, mCacheBitmap.getWidth(), mCacheBitmap.getHeight()),
new Rect(
(canvas.getWidth() - mCacheBitmap.getWidth()) / 2,
(canvas.getHeight() - mCacheBitmap.getHeight()) / 2,
(canvas.getWidth() - mCacheBitmap.getWidth()) / 2 + mCacheBitmap.getWidth(),
(canvas.getHeight() - mCacheBitmap.getHeight()) / 2 + mCacheBitmap.getHeight()),
null);
}
if (mFpsMeter != null) {
mFpsMeter.measure();
mFpsMeter.draw(canvas, 20, 30);
}
getHolder().unlockCanvasAndPost(canvas);
}
}
}