1. Made glpclview not go "ape-shit" when no kinect is found

2. cvdemo and glpclview give nicer messages when no kinect is found
Signed-off-by: Brandyn A. White <[email protected]>

examples/glpclview.c

@@ -39,7 +39,7 @@
 #include <GL/gl.h>
 #include <GL/glu.h>
 #endif
-
+#include <stdlib.h>
 #include <math.h>
 
 int window;
@@ -105,17 +105,21 @@ void mousePress(int button, int state, int x, int y)
     }
 }
 
+void no_kinect_quit(void)
+{
+    printf("Error: Kinect not connected?\n");
+    exit(1);
+}
+
 void DrawGLScene()
 {
     short *depth = 0;
     char *rgb = 0;
     uint32_t ts;
     if (freenect_sync_get_depth((void**)&depth, &ts, 0, FREENECT_DEPTH_11BIT) < 0)
-        return;
-    if (freenect_sync_get_video((void**)&rgb, &ts, 0, FREENECT_VIDEO_RGB) < 0) {
-        free(depth);
-        return;
-    }
+	no_kinect_quit();
+    if (freenect_sync_get_video((void**)&rgb, &ts, 0, FREENECT_VIDEO_RGB) < 0)
+	no_kinect_quit();
 
     static unsigned int indices[480][640];
     static short xyz[480][640][3];

wrappers/opencv/cvdemo.c

@@ -1,5 +1,6 @@
 #include <opencv/cv.h>
 #include <opencv/highgui.h>
+#include <stdio.h>
 #include "libfreenect_cv.h"
 
 IplImage *GlViewColor(IplImage *depth)
@@ -56,12 +57,16 @@ int main(int argc, char **argv)
 {
 	while (cvWaitKey(10) < 0) {
 		IplImage *image = freenect_sync_get_rgb_cv(0);
-		if (!image)
+		if (!image) {
+		    printf("Error: Kinect not connected?\n");
 		    return -1;
+		}
 		cvCvtColor(image, image, CV_RGB2BGR);
 		IplImage *depth = freenect_sync_get_depth_cv(0);
-		if (!depth)
+		if (!depth) {
+		    printf("Error: Kinect not connected?\n");
 		    return -1;
+		}
 		cvShowImage("RGB", image);
 		cvShowImage("Depth", GlViewColor(depth));
 	}