From: hackbard <hackbard>
Date: Fri, 29 Aug 2003 19:14:53 +0000 (+0000)
Subject: v4l tests
X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fivac.git;a=commitdiff_plain;h=7d2e0c946446baafb21df665dbaa2b58bbd682fd

v4l tests
---

diff --git a/test.c b/test.c
new file mode 100644
index 0000000..2ad2ba8
--- /dev/null
+++ b/test.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include "v4lapi.h"
+
+int main(void) {
+	
+	v4l_init("/dev/v4l/video0");
+	
+	return 1;
+}
diff --git a/v4lapi.c b/v4lapi.c
new file mode 100644
index 0000000..a85a8a1
--- /dev/null
+++ b/v4lapi.c
@@ -0,0 +1,79 @@
+/*
+ * v4lapi.c -- api to the video4linux interface
+ *
+ * author: hackbard@hackdaworld.dyndns.org
+ *
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include <linux/videodev.h>
+
+int v4l_init(char *dev) {
+	int fd;
+	struct video_capability vc;
+	struct video_buffer vb;
+	struct video_window vw;
+	
+	if((fd=open(dev,O_RDONLY))<0) {
+		puts("open failed");
+		return -1;
+	}
+
+	if(ioctl(fd,VIDIOCGCAP,&vc)<0) {
+		puts("ioctl VIDIOCGCAP failed");
+		return -1;
+	}
+
+	printf("video device information:\n");
+	printf("-------------------------\n\n");
+	printf("interface name: %s\n\n",vc.name);
+	printf("type:\n");
+	printf("capture:\t %c\n",(vc.type&1)?'y':'n');
+	printf("tuner:\t\t %c\n",((vc.type>>1)&1)?'y':'n');
+	printf("teletext:\t %c\n",((vc.type>>2)&1)?'y':'n');
+	printf("overlay:\t %c\n",((vc.type>>3)&1)?'y':'n');
+	printf("chromakey:\t %c\n",((vc.type>>4)&1)?'y':'n');
+	printf("clipping:\t %c\n",((vc.type>>5)&1)?'y':'n');
+	printf("fb memory:\t %c\n",((vc.type>>6)&1)?'y':'n');
+	printf("scalable:\t %c\n",((vc.type>>7)&1)?'y':'n');
+	printf("monochrome:\t %c\n",((vc.type>>8)&1)?'y':'n');
+	printf("subcapture:\t %c\n",((vc.type>>9)&1)?'y':'n');
+	printf("decode: ");
+	if((vc.type>>10)&1) printf("mpeg ");
+	if((vc.type>>12)&1) printf("mjpeg ");
+	printf("\n");
+	printf("encode: ");
+	if((vc.type>>11)&1) printf("mpeg ");
+	if((vc.type>>13)&1) printf("mjpeg ");
+	printf("\n\n");
+	printf("channels:\t %d\n",vc.channels);
+	printf("audios:\t\t %d\n",vc.audios);
+	printf("width:\t\t %d - %d\n",vc.minwidth,vc.maxwidth);
+	printf("height:\t\t %d - %d\n\n",vc.minheight,vc.maxheight);
+
+	if(ioctl(fd,VIDIOCGFBUF,&vb)<0)
+		puts("direct framebuffer access unsupported");
+		puts("");
+	else {
+		printf("\n");
+		printf("framebuffer:\n");
+		printf("buffer addr:\t %d\n",vb.base);
+		printf("h: %d - w: %d - d: %d - bpl: %d\n\n",vb.height,vb.width,vb.depth,vb.bytesperline);
+	}
+
+	if(ioctl(fd,VIDIOCGWIN,&vw)<0) {
+		puts("ioctl VIDIOCGWIN failed");
+		return -1;
+	}
+
+	printf("capture area:\n");
+	printf("x: %u - y: %u\n",vw.x,vw.y);
+	printf("w: %u - h: %u\n",vw.width,vw.height);
+	printf("
+	return 1;
+}
diff --git a/v4lapi.h b/v4lapi.h
new file mode 100644
index 0000000..25d3210
--- /dev/null
+++ b/v4lapi.h
@@ -0,0 +1,5 @@
+/*
+ * v4lapi.h -- function prototypes
+ */
+
+int v4l_init(char *dev);
diff --git a/v4lapi.o b/v4lapi.o
new file mode 100644
index 0000000..4ffba81
Binary files /dev/null and b/v4lapi.o differ