utils/libmedia_dev/README: add an example to list all video nodes

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/utils/libmedia_dev/README b/utils/libmedia_dev/README
index b238da0..9585230 100644 (file)
--- a/utils/libmedia_dev/README
+++ b/utils/libmedia_dev/README
@@ -108,7 +108,7 @@ The parameters are:
        desired_type:   type of the desired device
        fd_seek_device: file handler for the device where the association will
                        be made
-       seek_type:      type of the seek device. Using NONE produces the same
+       seek_type:      type of the seek device. Using NONE produces the same
                        result of using NULL for the seek_device.
 
 This function seeks inside the media_devices struct for the next device
@@ -183,3 +183,16 @@ d) Get the mainboard alsa playback devices:
                        printf("Alsa playback: %s\n", devname);
        } while (devname);
        free_media_devices(md);
+
+e) Get all video devices:
+
+       void *md = discover_media_devices();
+       char *vid = NULL;
+       do {
+               vid = get_associated_device(md, vid, MEDIA_V4L_VIDEO,
+                                           NULL, NONE);
+               if (!vid)
+                       break;
+               printf("Video device: %s\n", vid);
+       } while (vid);
+       free_media_devices(md);