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Backgroundsubtractor: protect async against release of input mat

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This commit is contained in:
Simon Hailes 2017-11-12 15:45:03 +00:00
parent f7d6b6cdee
commit e0087841bd
1 changed files with 9 additions and 7 deletions
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16
src/BackgroundSubtractor.cc
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@ -313,13 +313,15 @@ public:
AsyncBackgroundSubtractorWorker(
Nan::Callback *callback,
BackgroundSubtractorWrap *bg,
Matrix *img) :
cv::Mat &img_mat):
Nan::AsyncWorker(callback),
bg(bg),
img(img) {
img_mat(img_mat) { // note: this makes a new cv::Mat, and so increments the ref count for the data without copying it
}
~AsyncBackgroundSubtractorWorker() {
// upon destroy, img_mat will reduce refcount on data by one
}
// Executed inside the worker-thread.
@ -330,9 +332,9 @@ public:
// wait here if already in apply - auto-release on scope exit
BGAutoMutex(bg->applymutex);
#if CV_MAJOR_VERSION >= 3
bg->subtractor->apply(this->img->mat, _fgMask);
bg->subtractor->apply(this->img_mat, _fgMask);
#else
bg->subtractor->operator()(this->img->mat, _fgMask);
bg->subtractor->operator()(this->img_mat, _fgMask);
#endif
}
@ -360,7 +362,7 @@ public:
private:
BackgroundSubtractorWrap *bg;
Matrix *img;
cv::Mat img_mat;
cv::Mat _fgMask;
};
@ -399,8 +401,8 @@ NAN_METHOD(BackgroundSubtractorWrap::Apply) {
}
Nan::Callback *callback = new Nan::Callback(cb.As<Function>());
Matrix *_img = Nan::ObjectWrap::Unwrap<Matrix>(info[0]->ToObject());
Nan::AsyncQueueWorker(new AsyncBackgroundSubtractorWorker( callback, self, _img));
Matrix *_img = Nan::ObjectWrap::Unwrap<Matrix>(info[0]->ToObject());
Nan::AsyncQueueWorker(new AsyncBackgroundSubtractorWorker( callback, self, _img->mat));
return;
} else { //synchronous - return the image