i can now read a few portable pixmap, the P6 type

floatimg.h

@@ -43,6 +43,7 @@ int   fimg_add_rgb(FloatImg *head, int x, int y, float r, float g, float b);
 
 /*	PNM files module		*/
 int fimg_save_as_pnm(FloatImg *head, char *fname, int notused);
+int fimg_load_from_pnm(char *fname, FloatImg *head, int notused);
 
 double fimg_timer_set(int whot);
 double fimg_timer_get(int whot);

lib/Makefile

@@ -12,6 +12,9 @@ AR=ar
 
 all:	$(OBJS) ../libfloatimg.a
 
+t:	t.c ../libfloatimg.a $(DEPS)
+	gcc $(COPT) $< ../libfloatimg.a -o $@
+
 # --------------------------------------------
 
 ../libfloatimg.a:	$(OBJS)

lib/fimg-pnm.c

@@ -7,6 +7,7 @@
 #include  <stdio.h>
 #include  <stdlib.h>
 #include  <unistd.h>
+
 #include  "string.h"
 
 #include  "../floatimg.h"
@@ -14,6 +15,67 @@
 extern int verbosity;		/* must be declared around main() */
 
 /* ---------------------------------------------------------------- */
+/* nouveau juin 2019, pendant la Ravebish */
+
+int fimg_load_from_pnm(char *fname, FloatImg *head, int notused)
+{ 
+FILE		*fp;
+int		width, height, maxval;
+int		foo, line, column;
+unsigned char	*buffline, *idxrd;
+float		*Rptr, *Gptr, *Bptr;
+
+if (NULL==head) {
+	fprintf(stderr, "%s : head ptr is %p\n", __func__, head);
+	return -8;
+	}
+
+if (NULL==(fp=fopen(fname, "r"))) {
+	perror(fname);
+	exit(1);
+	}
+
+foo = fscanf(fp, "P6 %d %d %d", &width, &height, &maxval);
+if (3 != foo) {
+	fprintf(stderr, "%s : fscanf -> %d\n", __func__, foo);
+	return -1;
+	}
+
+if (verbosity) {
+	fprintf(stderr, "%s is %dx%d , max=%d\n",fname, width, height, maxval);
+	}
+
+if (NULL==(buffline=calloc(3, width))) {
+	fprintf(stderr, "%s on %s : memory error\n", __func__, fname);
+	return -2;
+	}
+
+foo = fimg_create(head, width, height, 3);
+if (foo) {
+        fprintf(stderr, "%s : create floatimg -> %d\n", __func__, foo);
+        exit(1);
+        }
+
+fseek(fp, 1L, SEEK_CUR);		/* black magic */
+
+Rptr = head->R;    Gptr = head->G;    Bptr = head->B;
+for (line=0; line<height; line++) {
+	foo = fread(buffline, 3, width, fp);
+	fprintf(stderr, "line %d read %d\n", line, width);
+	idxrd = buffline;
+	for (column=0; column<width; column++)
+		{
+		*Rptr++ = (float)*idxrd++;
+		*Gptr++ = (float)*idxrd++;
+		*Bptr++ = (float)*idxrd++;
+		}
+	}
+
+fclose(fp);
+
+return 0;
+}
+
 /* ---------------------------------------------------------------- */
 
 int fimg_save_as_pnm(FloatImg *head, char *fname, int notused)

v4l2/grabvidseq.c

@@ -194,6 +194,7 @@ for (i = 0; i < nbre_capt; i++) {
 			    fmt.fmt.pix.width, fmt.fmt.pix.height);
 	fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);
 	fclose(fout);
+
 	if (nbre_capt > 1 && period) {
 		sleep(period);
 		}