useless comments

lib/fimg-file.c

@@ -117,7 +117,7 @@ if (NULL==(fp = fopen(fname, "r"))) {
 	}
 foo = fread(&filehead, sizeof(FimgFileHead), 1, fp);  
 if (1 != foo) {
-	fprintf(stderr, "%s : short read\n", fname);
+	fprintf(stderr, "%s: short read on '%s'\n", __func__, fname);
 	fclose(fp);
 	return -1;
 	}
@@ -127,15 +127,17 @@ if (	(filehead.w != where->width) ||
 	(filehead.h != where->height) ||
 	(filehead.t != where->type) ) {
 
-	fprintf(stderr, "file '%s' incompatible\n", fname);
-	exit(3);
+	fprintf(stderr, "%s: file '%s' incompatible\n", __func__, fname);
+	fclose(fp);
+	return -17;
 	}
 
 nbre = filehead.w*filehead.h*filehead.t;	/* ugly quirk */
 foo = fread(where->R, sizeof(float), nbre, fp);
 if (nbre != foo) {
-	fprintf(stderr, "err read '%s' : %d\n", fname, errno);
-	exit(3);
+	fprintf(stderr, "%s: err read '%s' : %d\n", __func__, fname, errno);
+	fclose(fp);
+	return -18;
 	}
 
 fclose(fp);

lib/operators.c

@@ -15,6 +15,10 @@
 extern int verbosity;		/* must be declared around main() */
 
 /* ---------------------------------------------------------------- */
+/*
+ * 	A + B -> D
+ * 				why is this func so slow ?
+ */
 int fimg_add(FloatImg *a, FloatImg *b, FloatImg *d)
 {
 int		idx, nbiter;
@@ -57,6 +61,9 @@ if (3 != a->type || 3 != b->type || 3 != d->type) {
 
 nbiter = a->width * a->height;
 
+/*		maybe we can speedup this loop for
+ *		avoiding the cache strashing ?
+ */
 for (idx=0; idx<nbiter; idx++) {
 	d->R[idx] = fabs(a->R[idx] - b->R[idx]);
 	d->G[idx] = fabs(a->G[idx] - b->G[idx]);

v4l2/rgb2fimg.c

@@ -41,6 +41,8 @@ for (y=0; y<h; y++) {
 		r = (float)*src++;
 		g = (float)*src++;
 		b = (float)*src++;
+
+		/* may be, here, we can speed up the job */
 		fimg_add_rgb(d, xx, yy, r, g, b);
 		}
 	}