Small bug fixes & small changes

dsp.c

@@ -209,7 +209,7 @@ int getpixelv(float *pvbuff, int count) {
 }
 
 // Get an entire row of pixels, aligned with sync markers
-// FIXME: skips noisy lines with no findable sync marker
+// FIXME: loses sync easily
 int getpixelrow(float *pixelv, int nrow, int *zenith, int reset) {
 	static float pixels[PixelLine + SyncFilterLen];
 	static int npv;
@@ -303,4 +303,4 @@ int getpixelrow(float *pixelv, int nrow, int *zenith, int reset) {
 	}
 
 	return 1;
-}
+}

image.c

@@ -164,7 +164,7 @@ int calibrate(float **prow, int nrow, int offset, int width) {
 		}
 	}
 
-	telestart = (mtelestart - 64) % FRAME_LEN;
+	telestart = (mtelestart + 64) % FRAME_LEN;
 
 	// Make sure that theres at least one full frame in the image
 	if (nrow < telestart + FRAME_LEN) {

pngio.c

@@ -86,7 +86,7 @@ int mapOverlay(char *filename, rgb_t **crow, int nrow, int zenith, int MCIR) {
 	for(int y = 0; y < nrow; y++) {
 		for(int x = 49; x < width - 82; x++){
 			// Maps are 16 bit / channel
-			png_bytep px = &mapRows[CLIP(y + mapOffset, 0, height)][x * 6];
+			png_bytep px = &mapRows[CLIP(y + mapOffset, 0, height-1)][x * 6];
 			rgb_t map = {
 				(px[0] << 8) | px[1],
 				(px[2] << 8) | px[3],