From 6e40287e2f39a80fc72bd8d0fbc1a8334d688c2d Mon Sep 17 00:00:00 2001
From: etobi <git@e-tobi.net>
Date: Tue, 3 Sep 2013 09:48:38 +0200
Subject: Imported Upstream version 1.1.0

---
 test/video.c | 182 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 test/video.c

(limited to 'test/video.c')

diff --git a/test/video.c b/test/video.c
new file mode 100644
index 0000000..ea9e4a2
--- /dev/null
+++ b/test/video.c
@@ -0,0 +1,182 @@
+ /**
+ *  A tiny video watching application, just starts capturing /dev/video
+ *  into /dev/fb0.
+ *  Be shure to have >8Bit/pixel color resolution and r/w access for 
+ *  /dev/video0, /dev/fb0 and /dev/tty0 to let this work...
+ *
+ *   compile with
+ *
+ *   $ gcc -g -Wall -O2 -o video video.c -I../../ost/include
+ */
+
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <linux/fb.h>
+#include <linux/videodev.h>
+
+#define VIDEO_DEV "/dev/video0"
+#define FB_DEV "/dev/fb0"
+#define VT_DEV "/dev/tty0"
+
+static char *video_devname = VIDEO_DEV;
+
+#define min(a,b)	(a) < (b) ? (a) : (b)
+
+static int zero = 0;
+static int one = 1;
+
+static struct fb_var_screeninfo fb_var;
+static struct fb_fix_screeninfo fb_fix;
+
+
+int init_fb (void)
+{
+	const char blankoff_str[] = "\033[9;0]";
+	int fd, vt_fd;
+
+	fd = open (FB_DEV, O_RDWR);
+	if (fd < 0) {
+		perror("Could not open " FB_DEV ", please check permissions\n");
+		return 1;
+	}
+
+	if ((vt_fd = open( VT_DEV, O_RDWR )) < 0) {
+		perror("Could not open " VT_DEV ", please check permissions\n");
+		return 1;
+	}
+
+	write( vt_fd, blankoff_str, strlen(blankoff_str) );
+	
+	if (ioctl (fd, FBIOGET_VSCREENINFO, &fb_var) < 0) {
+		perror("Could not get variable screen information (fb_var)\n");
+		return 1;
+	}
+
+	if (ioctl (fd, FBIOGET_FSCREENINFO, &fb_fix) < 0) {
+		perror("Could not get fixed screen information (fb_fix)\n");
+		return 1;
+	}
+
+	close (fd);
+	return 0;
+}
+
+
+int init_video (int stop)
+{
+	int fd;
+	struct video_capability vcap;
+
+	if ((fd = open (video_devname, O_RDWR)) < 0) {
+		fprintf (stderr, 
+			 "%s: Could not open %s, please check permissions\n",
+			 __FUNCTION__, video_devname);
+		return -1;
+	}
+
+	ioctl(fd, VIDIOCGCAP, &vcap);
+	
+	if (ioctl(fd, VIDIOCCAPTURE, &zero) < 0) {
+		perror("Could not stop capturing (VIDIOCCAPTURE failed)\n");
+		return -2;
+	}
+
+	if (stop)
+		return 0;
+	
+	{
+		struct video_buffer b;
+		b.base = (void*) fb_fix.smem_start;
+		b.width = fb_var.xres;
+		b.height = fb_var.yres;
+		b.depth = fb_var.bits_per_pixel;
+		b.bytesperline = fb_var.xres*((fb_var.bits_per_pixel+7)/8);
+		if (ioctl(fd, VIDIOCSFBUF, &b) < 0) {
+			fprintf(stderr, "VIDIOCSFBUF failed, must run as root?\n");
+			return -3;
+		}
+	}
+	
+	{
+		struct video_picture p;
+		if (ioctl(fd, VIDIOCGPICT, &p) < 0) {
+			perror("VIDIOCGPICT failed\n");
+			return -4;
+		}
+		p.depth = fb_var.bits_per_pixel;
+		switch (fb_var.bits_per_pixel) {
+			case 16:
+				p.palette = VIDEO_PALETTE_RGB565;
+				break;
+			case 24:
+				p.palette = VIDEO_PALETTE_RGB24;
+				break;
+			case 32:
+				p.palette = VIDEO_PALETTE_RGB32;
+				break;
+		}
+		//p.contrast = 0x8000;
+		//p.colour = 0x6000;
+		if (ioctl(fd, VIDIOCSPICT, &p) < 0) {
+			perror("VIDIOCSPICT failed\n");
+			return -5;
+		}
+	}
+	
+	{
+		struct video_window win;
+		win.width = min((__u32) vcap.maxwidth, fb_var.xres);
+		win.height = min((__u32) vcap.maxheight, fb_var.yres);
+		win.x = 0;
+		win.y = 0;
+		win.flags = 0;
+		win.clips = NULL;
+		win.clipcount = 0;
+		win.chromakey = 0;
+		if (ioctl(fd, VIDIOCSWIN, &win) < 0) {
+			perror("VIDIOCSWIN failed\n");
+			return -6;
+		}
+	}
+	
+	if (ioctl(fd, VIDIOCCAPTURE, &one) < 0) {
+		perror("Could not start capturing (VIDIOCCAPTURE failed)\n");
+		return -7;
+	}
+	
+	close (fd);
+	
+	return 0;
+}
+
+int main (int argc, char **argv)
+{
+	int err = 0, stop = 0;
+
+	if ((err = init_fb()))
+		return err;
+
+	if ((argc == 2 && strcmp(argv[1], "stop") == 0) ||
+	    (argc == 3 && strcmp(argv[2], "stop") == 0))
+		stop = 1;
+
+	if ((argc == 2 && !stop) || argc == 3)
+		video_devname = argv[1];
+
+	if (argc != 1 && argc != 2 && !(argc == 3 && stop)) {
+		fprintf (stderr, "usage: %s <devname> <stop>\n", argv[0]);
+		exit (-1);
+	}
+
+	return init_video (stop);
+}
+
-- 
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