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Enhancement to video stream input thread

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Kees-V
2014-10-26 10:56:09 +01:00
parent 686743484c
commit 528b548b11
1 changed files with 15 additions and 9 deletions
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24
src/video/videobuffer.cpp
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@@ -149,30 +149,36 @@ void imageCollectionThread(void* arg)
// it returns so that the video capture can be recreated. // it returns so that the video capture can be recreated.
void getALPRImages(cv::VideoCapture cap, VideoDispatcher* dispatcher) void getALPRImages(cv::VideoCapture cap, VideoDispatcher* dispatcher)
{ {
cv::Mat frame; cv::Mat frame1;
cv::Mat frame2;
cv::Mat* receiveframe;
BOOLEAN receiveframeisframe1 = TRUE;
while (dispatcher->active) while (dispatcher->active)
{ {
while (dispatcher->active) while (dispatcher->active)
{ {
dispatcher->mMutex.lock();
bool hasImage = false; bool hasImage = false;
try try
{ {
hasImage = cap.read(frame); if (receiveframeisframe1) receiveframe = &frame1;
// Double check the image to make sure it's valid. else receiveframe = &frame2;
if (!frame.data || frame.empty()) hasImage = cap.read(*receiveframe);
// Double check the image to make sure it's valid.
if (!(*receiveframe).data || (*receiveframe).empty())
{ {
dispatcher->mMutex.unlock();
std::stringstream ss; std::stringstream ss;
ss << "Stream " << dispatcher->mjpeg_url << " received invalid frame"; ss << "Stream " << dispatcher->mjpeg_url << " received invalid frame";
dispatcher->log_error(ss.str()); dispatcher->log_error(ss.str());
return; return;
} }
dispatcher->setLatestFrame(&frame); dispatcher->mMutex.lock();
} dispatcher->setLatestFrame(receiveframe);
dispatcher->mMutex.unlock();
receiveframeisframe1 = !receiveframeisframe1;
}
catch (const std::runtime_error& error) catch (const std::runtime_error& error)
{ {
// Error occured while trying to gather image. Retry, don't exit. // Error occured while trying to gather image. Retry, don't exit.