PKGCONFIG += gstreamer-plugins-bad-0.1

Package gstreamer-plugins-bad-0.10 was not found in the pkg-config search path. 
Perhaps you should add the directory containing `gstreamer-plugins-bad-0.10.pc' 
to the PKG_CONFIG_PATH environment variable 
No package 'gstreamer-plugins-bad-0.10' found

gst_photography_set_autofocus(GST_PHOTOGRAPHY(camera_src), true);

gst_photography_set_flash_mode(GST_PHOTOGRAPHY (camera_src), GST_PHOTOGRAPHY_FLASH_MODE_ON);

g_object_set(G_OBJECT(camera_src), "driver-name", "omap3cam", NULL);

void flash() {
	int	fd;
	int	flash_intensity_max;
	int	flash_time_max;
	struct v4l2_queryctrl 	qctrl;
	struct v4l2_control	ctrl;

	fd = open("/dev/video0", O_RDWR | O_NONBLOCK, 0);
	if (fd == -1) {
		return;
	}
	// Get maximum flash intensity
	qctrl.id = V4L2_CID_FLASH_INTENSITY;
	if (ioctl(fd, VIDIOC_QUERYCTRL, &qctrl) == -1) {
		goto error;
	}
	flash_intensity_max = qctrl.maximum;
	// Get the maximum flash duration
	qctrl.id = V4L2_CID_FLASH_TIMEOUT;
	if (ioctl(fd, VIDIOC_QUERYCTRL, &qctrl) == -1) {
		goto error;
	}
	flash_time_max = qctrl.maximum;

	// Set the intensity to the maximum
	ctrl.id = V4L2_CID_FLASH_INTENSITY;
	ctrl.value = flash_intensity_max;
	if (ioctl(fd, VIDIOC_S_CTRL, &ctrl) == -1) {
		goto error;
	}
	// Set the timeout
	ctrl.id = V4L2_CID_FLASH_TIMEOUT;
	ctrl.value = flash_time_max;
	if (ioctl(fd, VIDIOC_S_CTRL, &ctrl) == -1) {
		goto error;
	}
	// Finally fire the flash
	ctrl.id = V4L2_CID_FLASH_STROBE;
	if (ioctl(fd, VIDIOC_S_CTRL, &ctrl) == -1) {
		goto error;
	}

error:
	close(fd);
}