Added functions to get and set the gain and exposure parameters.

include/li_camera.h

@@ -31,6 +31,10 @@ class CLICamera
     #ifdef HAVE_OPENCV_H 
     bool get_image(cv::Mat &image);
     #endif
+    void set_gain(unsigned short int gain);
+    unsigned short int get_gain(void);
+    void set_exposure(unsigned int exposure);
+    unsigned int get_exposure(void);
     void close(void);
     ~CLICamera();
 };

src/examples/li_camera_test.cpp

@@ -15,6 +15,10 @@ int main(int argc, char *argv[])
     cv::namedWindow("GlobalShutter",1);
    
     camera.open(0x2a0b,0x00f8);
+    std::cout << "current gain: " << camera.get_gain() << std::endl;
+    camera.set_gain(32);
+    std::cout << "current exposure: " << camera.get_exposure() << std::endl;
+    camera.set_exposure(32);
     for(i=0;i<100;i++)
     {
       if(camera.get_image(image))

src/li_camera.cpp

@@ -178,6 +178,64 @@ bool CLICamera::get_image(cv::Mat &image)
 }
 #endif
 
+void CLICamera::set_gain(unsigned short int gain)
+{
+  this->uvc_access.enter();
+
+  if(uvc_set_gain(this->device_handle,gain))
+  {
+    this->uvc_access.exit();
+    throw CLICameraException(_HERE_,"Impossible to set gain");
+  }
+
+  this->uvc_access.exit();
+}
+
+unsigned short int CLICamera::get_gain(void)
+{
+  unsigned short int gain;
+
+  this->uvc_access.enter();
+
+  if(uvc_get_gain(this->device_handle,&gain,UVC_GET_CUR))
+  { 
+    this->uvc_access.exit();
+    throw CLICameraException(_HERE_,"Impossible to get gain");
+  }
+
+  this->uvc_access.exit();
+  return gain;
+}
+
+void CLICamera::set_exposure(unsigned int exposure)
+{
+  this->uvc_access.enter();
+
+  if(uvc_set_exposure_abs(this->device_handle,exposure))
+  {
+    this->uvc_access.exit();
+    throw CLICameraException(_HERE_,"Impossible to set gain");
+  }
+
+  this->uvc_access.exit();
+}
+
+unsigned int CLICamera::get_exposure(void)
+{
+  unsigned int exposure;
+
+  this->uvc_access.enter();
+
+  if(uvc_get_exposure_abs(this->device_handle,&exposure,UVC_GET_CUR))
+  {
+    this->uvc_access.exit();
+    throw CLICameraException(_HERE_,"Impossible to get gain");
+  }
+
+  this->uvc_access.exit();
+  return exposure;
+}
+
 void CLICamera::close(void)
 {
   this->uvc_access.enter();