cumul image can be converted to gray

doc/the_floatimg_hack.tex

@@ -200,10 +200,9 @@ dans \texttt{floatimg.h}. Les codes d'erreur sont disparates
 et non documenté.
 \vspace{1em}
 
-
-Bon, vous avez une image latente, et
-vous souhaité dessiner dessus (ou dedans ?) avec vos encres
-flottantes ?
+Bon, vous avez une image latente, et vous souhaitez dessiner dessus
+(ou dedans ?) avec vos encres flottantes ?
+Il y a une fonction pour ça.
 
 \subsection{funcs/}\index{funcs/}\label{funcs}
 

essai.c

@@ -14,21 +14,11 @@
 int		verbosity;
 
 /* --------------------------------------------------------------------- */
-void fait_un_dessin(char *fname)
+void fait_un_dessin(FloatImg *dessin)
 {
-FloatImg	dessin;
-double		tb;
 
-puts("");
-fimg_timer_set(0);
-fimg_create(&dessin, 3200, 2400, 3);
-fimg_draw_something(&dessin);
-fimg_dump_to_file(&dessin, "dessin.fimg", 0);
-fimg_destroy(&dessin);
-tb = fimg_timer_get(0);
-fprintf(stderr, "%s = %f seconds\n", __func__, tb);
+fimg_draw_something(dessin);
 
-puts("");
 }
 /* --------------------------------------------------------------------- */
 void help(int k)
@@ -60,10 +50,17 @@ if (verbosity) fimg_print_version(0);
 fimg_create(&fimgA, W, H, 3);
 fimg_create(&fimgB, W, H, 3);
 
-fimg_timer_set(0);
 fimg_drand48(&fimgB, 100.0);
-fimg_drand48(&fimgA, 100.0);
-fimg_add(&fimgA, &fimgB, &fimgA);
+fimg_timer_set(0);
+#define NBP 500
+for (foo=0; foo<NBP; foo++) {
+	if (verbosity) {
+		printf("%5d / %5d\n", foo, NBP);
+		}
+	fait_un_dessin(&fimgB);
+	fimg_add(&fimgA, &fimgB, &fimgA);
+	fimg_mul(&fimgA, &fimgB, &fimgA);
+	}
 tb = fimg_timer_get(0);
 fprintf(stderr, "%s = %f seconds\n", __func__, tb);
 foo = fimg_save_as_pnm(&fimgA, "drand48.pnm", 0);

funcs/fimg-tiff.c

@@ -9,4 +9,11 @@
 
 /* --------------------------------------------------------------------- */
 /* --------------------------------------------------------------------- */
+int essai_ecrire_tiff(FloatImg *src, char *fname)
+{
+
+		/* bon, tout cela semble bien tortueux ! */
+
+return 0;
+}
 /* --------------------------------------------------------------------- */

lib/Makefile

@@ -2,7 +2,7 @@
 #	building the base library
 #
 
-COPT = -Wall -fpic -g -no-pie  -DDEBUG_LEVEL=0
+COPT = -Wall -fpic -g -no-pie -pg  -DDEBUG_LEVEL=0
 OBJS = fimg-core.o fimg-pnm.o fimg-file.o fimg-math.o	\
 	fimg-timers.o operators.o fimg-2gray.o
 DEPS = Makefile ../floatimg.h

lib/fimg-math.c

@@ -117,9 +117,16 @@ int		nbre, idx;
 fprintf(stderr, ">>> %s ( %p %g )\n", __func__, fi, kmul);
 #endif
 
-nbre = fi->width * fi->height * fi->type;
+if (fi->type != FIMG_TYPE_RGB) {
+	fprintf(stderr, "%s : type %d invalide\n",
+				__func__, fi->type);
+	return;
+	}
+nbre = fi->width * fi->height;
 for (idx=0; idx<nbre; idx++) {
 	fi->R[idx] = drand48() * kmul;
+	fi->G[idx] = drand48() * kmul;
+	fi->B[idx] = drand48() * kmul;
 	}
 
 }

tools/Makefile

@@ -26,8 +26,8 @@ fimg2pnm:	fimg2pnm.c  $(DEPS)
 fimg2png:	fimg2png.c  $(DEPS)
 	gcc $(COPT) $< ../libfloatimg.a -o $@ 
 
-addtga2fimg:	addtga2fimg.c  $(DEPS)
-	gcc $(COPT) $< ../libfloatimg.a -limageSO -lm -o $@
+# addtga2fimg:	addtga2fimg.c  $(DEPS)
+#	gcc $(COPT) $< ../libfloatimg.a -limageSO -lm -o $@
 
 addpnm2fimg:	addpnm2fimg.c  $(DEPS)
 	gcc $(COPT) $< ../libfloatimg.a -lm -o $@

v4l2/exemple.txt

@@ -1,42 +0,0 @@
--- v4l2_capability, /dev/video0      0x7ffeee718100
-   driver          cx231xx
-   card            Pixelview Xcapture USB
-   bus info        usb-0000:00:1a.0-1.2
-   version         0x41325
-   capabilities    0x85200011
-     vcapt vbicapt extpix rwsysc stream 
-   device caps     0x5200001
--- inputs enumeration 'on peut voir quoi ?'
-Composite1                       | camera    
-S-Video                          | camera    
--- v4l2_format, Experimental     0x7ffeee718030
-   type 1          video capture
-   dims            720x576
-   pixformat       [YUYV]
-   field           4
-   padding         1440
-   sizeimage       829440
-   colorspace      1  smpte170m
--- image formats enumeration (Experimental)
-  0  vidcapt    0x00   [YUYV]   YUYV 4:2:2                       
--- controls enumeration 'is that working ?'
-  Brightness                         integer     [0..255]
-  Contrast                           integer     [0..127]
-  Saturation                         integer     [0..127]
-  Hue                                integer     [-128..127]
-  Volume                             integer     [0..65535]
-  Balance                            integer     [0..65535]
-  Bass                               integer     [0..65535]
-  Treble                             integer     [0..65535]
-  Mute                               boolean     [0..1]
--- extended controls enumeration 'looking for extended'
-  User Controls                      ctrl-class  [0..0]
-  Brightness                         integer     [0..255]
-  Contrast                           integer     [0..127]
-  Saturation                         integer     [0..127]
-  Hue                                integer     [-128..127]
-  Volume                             integer     [0..65535]
-  Balance                            integer     [0..65535]
-  Bass                               integer     [0..65535]
-  Treble                             integer     [0..65535]
-  Mute                               boolean     [0..1]

v4l2/grabvidseq.c

@@ -36,9 +36,6 @@
 #define SAVE_AS_PNM	0
 #define SAVE_AS_FIMG	0
 
-#define		WIDTH		720
-#define		HEIGHT		576
-
 /* --------------------------------------------------------------------- */
 
 #define CLEAR(x) memset(&(x), 0, sizeof(x))
@@ -74,10 +71,12 @@ if (verbosity) {
 	}
 puts("options :");
 puts("\t-d /dev/?\tselect video device");
+puts("\t-g\t\tconvert to gray");
 puts("\t-n NNN\t\thow many frames ?");
 puts("\t-O ./\t\tset Output dir");
 puts("\t-o bla\t\tset output filename");
 puts("\t-p NNN\t\tperiod in seconds");
+puts("\t-s WxH\t\tsize of capture");
 puts("\t-v\t\tincrease verbosity");
 exit(0);
 }
@@ -102,7 +101,10 @@ int		foo, bar;
 double		period = 10.0;		/* delai entre les captures */
 int		nbre_capt = 1;		/* nombre de captures */
 int		opt;
+int		width = 640;
+int		height = 480;
 double		t_final;
+int		to_gray = 0;
 char		*dest_dir = ".";	/* no trailing slash */
 char		*outfile = "out.pnm";
 
@@ -110,14 +112,16 @@ char		*outfile = "out.pnm";
 FloatImg	grab, cumul;
 #endif
 
-while ((opt = getopt(argc, argv, "d:hn:o:O:p:v")) != -1) {
+while ((opt = getopt(argc, argv, "d:ghn:o:O:p:s:v")) != -1) {
 	switch(opt) {
 		case 'd':	dev_name = optarg;		break;
+		case 'g':	to_gray = 1;			break;
 		case 'h':	help(0);			break;
 		case 'n':	nbre_capt = atoi(optarg);	break;
 		case 'O':	dest_dir = optarg;		break;
 		case 'o':	outfile = optarg;		break;
 		case 'p':	period = 1e6*atof(optarg);	break;
+		case 's':	parse_WxH(optarg, &width, &height);	break;
 		case 'v':	verbosity++;			break;
 		}
 	}
@@ -125,6 +129,7 @@ while ((opt = getopt(argc, argv, "d:hn:o:O:p:v")) != -1) {
 if (verbosity) {
 	fprintf(stderr, "running %s  pid=%d\n", argv[0], getpid());
 	fprintf(stderr, "period is %.3f microseconds\n", period);
+	fprintf(stderr, "framesize is %dx%d\n", width, height);
 	}
 
 fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
@@ -135,16 +140,17 @@ if (fd < 0) {
 
 CLEAR(fmt);
 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-fmt.fmt.pix.width       = WIDTH;
-fmt.fmt.pix.height      = HEIGHT;
+fmt.fmt.pix.width       = width;
+fmt.fmt.pix.height      = height;
 fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
 fmt.fmt.pix.field       = V4L2_FIELD_INTERLACED;
 xioctl(fd, VIDIOC_S_FMT, &fmt);
 if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) {
+	/* are others formats usable ? */
 	printf("Libv4l didn't accept RGB24 format. Can't proceed.\n");
 	exit(EXIT_FAILURE);
 	}
-if ((fmt.fmt.pix.width != WIDTH) || (fmt.fmt.pix.height != HEIGHT)) {
+if ((fmt.fmt.pix.width != width) || (fmt.fmt.pix.height != height)) {
 	printf("Warning: driver is sending image at %dx%d\n",
 			    fmt.fmt.pix.width, fmt.fmt.pix.height);
 	}
@@ -195,11 +201,10 @@ foo = fimg_create(&cumul,
 		FIMG_TYPE_RGB);
 fimg_clear(&cumul);
 cumul.fval = 255.0;
+cumul.count = 0;
 #endif
 
 
-
-
 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 xioctl(fd, VIDIOC_STREAMON, &type);
 
@@ -280,6 +285,10 @@ fprintf(stderr, "pid %d : elapsed time %g s\n", getpid(), t_final);
 fprintf(stderr, "\t%.2f fps\n", (double)nbre_capt / t_final);
 
 #if SAVE_AS_CUMUL
+if (to_gray) {
+	if (verbosity)	fputs("converting to gray\n", stderr);
+	foo = fimg_to_gray(&cumul);
+	}
 	// save cumul to file
 foo = fimg_save_as_pnm(&cumul, outfile, 0);
 	// free buffers

v4l2/video-infos.c

@@ -19,6 +19,38 @@
 
 int		verbosity;
 
+/* --------------------------------------------------------------------- */
+/*
+ *	this code was written from a strace output :)
+ */
+int enum_image_framesizes(int fd, char *txt, int k)
+{
+int				foo, idx;
+struct v4l2_frmsizeenum		fmtsz;
+
+printf("-- image framesizes enumeration (%s)\n", txt);
+
+for (idx=0; ; idx++) {
+	memset(&fmtsz, 0, sizeof(fmtsz));
+	fmtsz.index = idx;
+	foo = ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &fmtsz);
+
+	if (foo) {
+		if (EINVAL==errno) {
+			break;
+			}
+		else	{
+			perror(__func__);
+			break;
+			}
+		}
+
+	printf("%4d   %4d   %4d\n", idx, fmtsz.pixel_format, fmtsz.type);
+
+	}
+
+return 0;
+}
 /* --------------------------------------------------------------------- */
 int enum_image_formats(int fd, char *txt, int k)
 {
@@ -61,7 +93,7 @@ int 				index, foo;
 struct v4l2_input		input;
 char				ligne[50];
 
-printf("-- inputs enumeration '%s'\n", txt);
+printf("-- inputs enumeration (%s)\n", txt);
 
 index = 0;
 for(;;)	{
@@ -219,6 +251,7 @@ foo = enum_controls(vfd, "is that working ?", 0);
 
 foo = enum_extended_controls(vfd, "looking for extended", 0);
 
+enum_image_framesizes(vfd, "code pas fini", 0);
 
 close(vfd);