Expose grab-by-callback via camera and add asynchronous grabbing example

1 files changed, 46 insertions, 0 deletions

diff --git a/test/grab-async.c b/test/grab-async.c
new file mode 100644
index 0000000..8086d92
--- /dev/null
+++ b/test/grab-async.c
@@ -0,0 +1,46 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "uca.h"
+#include "uca-cam.h"
+
+void grab_callback(uint32_t image_number, void *buffer)
+{
+    printf("got picture number %i\n", image_number);
+}
+
+int main(int argc, char *argv[])
+{
+    struct uca *u = uca_init(NULL);
+    if (u == NULL) {
+        printf("Couldn't find a camera\n");
+        return 1;
+    }
+
+    /* take first camera */
+    struct uca_camera *cam = u->cameras;
+
+    uint32_t val = 1;
+    cam->set_property(cam, UCA_PROP_EXPOSURE, &val);
+    val = 0;
+    cam->set_property(cam, UCA_PROP_DELAY, &val);
+    val = 10;
+    cam->set_property(cam, UCA_PROP_FRAMERATE, &val);
+
+    uint32_t width, height, bits;
+    cam->get_property(cam, UCA_PROP_WIDTH, &width, 0);
+    cam->get_property(cam, UCA_PROP_HEIGHT, &height, 0);
+    cam->get_property(cam, UCA_PROP_BITDEPTH, &bits, 0);
+
+    uca_cam_alloc(cam, 10);
+
+    cam->register_callback(cam, &grab_callback);
+    cam->start_recording(cam);
+    printf("waiting for 10 seconds\n");
+    sleep(10);
+    cam->stop_recording(cam);
+
+    uca_destroy(u);
+    return 0;
+}