save some time

Makefile.rules.linux

@@ -2,10 +2,10 @@
 TARGET = $(APP)
 
 CPP = c++
-CPPFLAGS = -std=c++11 -ggdb -Wall -Werror -O0 `pkg-config --cflags gtk+-3.0 gmodule-export-2.0` -Wl,--export-dynamic -I/usr/include -DBUILD_LINUX=1
+CPPFLAGS = -std=c++11 -pg -ggdb -Wall -Werror -O0 `pkg-config --cflags gtk+-3.0 gmodule-export-2.0` -Wl,--export-dynamic -I/usr/include -DBUILD_LINUX=1
 INCLUDES = 
 LDFLAGS = 
-LIBS = `pkg-config --libs gtk+-3.0 gmodule-export-2.0` -L/usr/lib -ljpeg -ltiff
+LIBS = `pkg-config --libs gtk+-3.0 gmodule-export-2.0` -L/usr/lib -ljpeg -ltiff -pg
 OBJECTS =
 
 

convert.cc

@@ -346,8 +346,11 @@ int Convert (ConvertData *cdata, VideoFrame *dest, unsigned char *ptrsrc, int sr
 		break;
 
 	case (V4L2_PIX_FMT_SGRBG16):
-		// GG RR
-		// BB GG
+		// GG RR GG RR
+		// BB GG BB GG
+		// GG RR GG RR
+		// BB GG BB GG
+
 		uint16_t t;
 
 		for (ys = 0, yd = 0; ys < (signed int)srch; ys++) {

histogram.cc

@@ -112,6 +112,11 @@ void cb_histogramda_draw(GtkWidget *area, cairo_t *cr, int w, int h, gpointer da
  * test function
  */
 void histogram_update(VideoFrame *vf) {
+
+	// save some time
+	static int to = 0;
+	if ((++to) % 8 == 0) to = 0;
+
 	int chan, i, x, y;
 
 	if (vf == NULL) return;
@@ -123,7 +128,7 @@ void histogram_update(VideoFrame *vf) {
 	for (i = 0, x = 0; x < vf->w; x++) {
 		for (y = 0; y < vf->h; y++) {
 			for (chan = 0; chan < 3; chan++) {
-				histogram[chan][vf->data[3*(y*vf->w+x) + chan]]++;
+				histogram[chan][vf->data[i++]]++;
 			}
 		}
 	}