Added a dilatometer "sensor"

[matches/MCTX3420.git] / server / image.c

diff --git a/server/image.c b/server/image.c
index 3c30467..e1a586c 100644 (file)
--- a/server/image.c
+++ b/server/image.c
@@ -6,6 +6,7 @@
 #include <pthread.h>
 
 CvCapture *capture;
+IplImage *frame;
 int captureID = -1;
 
 void Image_Handler(FCGIContext * context, char * params)
@@ -43,19 +44,29 @@ void Image_Handler(FCGIContext * context, char * params)
        cvReleaseMat(&g_encoded);
        cvReleaseMat(&g_src);
 }
-
+       
  bool Camera_GetImage(int num, int width, int height,  CvMat * image)
  {
        static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; // Need to use a mutex to ensure 2 captures are not open at once
        pthread_mutex_lock(&mutex);
        bool result = false;
 
-       capture = cvCreateCameraCapture(num);
+       if( capture == NULL)
+       {
+               capture = cvCreateCameraCapture(num);
+               captureID = num;
+       }
+       else if( num != captureID)
+       {
+               cvReleaseCapture(&capture);
+               capture = cvCreateCameraCapture(num);   
+               captureID = num;
+       }
 
        cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH, width);
        cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT, height);
 
-       IplImage * frame = cvQueryFrame(capture);
+       frame = cvQueryFrame(capture);
        if( frame == NULL)
                return result;
 
@@ -65,11 +76,14 @@ void Image_Handler(FCGIContext * context, char * params)
        if( image == NULL)
                return result;
 
+       pthread_mutex_unlock(&mutex);   //Close the mutex
+       return true;
+}
+
+void Image_Cleanup()
+{
        // Release the capture and IplImage pointers
        cvReleaseImageHeader(&frame);
        cvReleaseCapture(&capture);
-
-       pthread_mutex_unlock(&mutex);   //Close the mutex
-       return true;
 }