v4l tests

diff --git a/test.c b/test.c
new file mode 100644 (file)
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 (file)
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 (file)
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 (file)
index 0000000..4ffba81
Binary files /dev/null and b/v4lapi.o differ