コード例 #1
0
ファイル: v4l_test.py プロジェクト: jshafer817/uvscada
def ex_1_8_enum_ctrls():
    print
    print
    print
    print 'ex_1_8_enum_ctrls()'
    queryctrl = v4l2.v4l2_queryctrl()
    querymenu = v4l2.v4l2_querymenu()
    print dir(querymenu)
    print querymenu.id

    def enumerate_menu():
        print "  Menu items:"
        querymenu.id = queryctrl.id
        for querymenu.index in xrange(queryctrl.minimum,
                                      queryctrl.maximum + 1):
            if 0 == fcntl.ioctl(vd, v4l2.VIDIOC_QUERYCAP, querymenu):
                print "  %s" % querymenu.name

    for queryctrl.id in xrange(v4l2.V4L2_CID_BASE, v4l2.V4L2_CID_LASTP1):
        break
        print 'loop: %d' % queryctrl.id
        if 0 == fcntl.ioctl(vd, v4l2.VIDIOC_QUERYCTRL, queryctrl):
            if queryctrl.flags & v4l2.V4L2_CTRL_FLAG_DISABLED:
                continue

            print "Control %s" % queryctrl.name

            if queryctrl.type == v4l2.V4L2_CTRL_TYPE_MENU:
                enumerate_menu()
        else:
            #if errno == EINVAL:
            #    continue;

            #perror("VIDIOC_QUERYCTRL");
            print "VIDIOC_QUERYCTRL"
            sys.exit(1)

    queryctrl.id = v4l2.V4L2_CID_PRIVATE_BASE
    while True:
        if 0 != fcntl.ioctl(vd, v4l2.VIDIOC_QUERYCTRL, queryctrl):
            # how to check this?
            #if (errno == EINVAL)
            #    break;

            # perror("VIDIOC_QUERYCTRL");
            print "VIDIOC_QUERYCTRL"
            sys.exit(1)

        if not (queryctrl.flags & v4l2.V4L2_CTRL_FLAG_DISABLED):
            print "Control %s" % queryctrl.name

            if queryctrl.type == v4l2.V4L2_CTRL_TYPE_MENU:
                enumerate_menu()
        queryctrl.id += 1
コード例 #2
0
ファイル: example_ioctl.py プロジェクト: rborgese/camset
def read_camera_controls(
):  # CID_BASE IDs do not include all settings that v4l2-ctl -L has, check CAMERA_CLASS_BASE ID range for the rest
    vd = open('/dev/video0', 'rb+', buffering=0)
    encoding = 'utf-8'
    qctrl = v4l2.v4l2_queryctrl()
    mctrl = v4l2.v4l2_querymenu()
    vctrl = v4l2.v4l2_control()
    qctrl.id = v4l2.V4L2_CID_CAMERA_CLASS_BASE
    mctrl.index = 0

    while qctrl.id < v4l2.V4L2_CID_PRIVACY:
        try:
            vctrl.id = qctrl.id
            fcntl.ioctl(vd, v4l2.VIDIOC_QUERYCTRL, qctrl)
            fcntl.ioctl(vd, v4l2.VIDIOC_G_CTRL, vctrl)
            print("Control name:", str(qctrl.name, encoding))
            print("Control type, 1=int, 2=bool, 3=menu:", qctrl.type)

            print("Maximum:", qctrl.maximum)
            print("Minimum:", qctrl.minimum)
            print("Step:", qctrl.step)
            print("Default:", qctrl.default_value)
            print("Value:", vctrl.value)

            if qctrl.type == 3:  # is menu
                while mctrl.index <= qctrl.maximum:
                    try:  # needed because sometimes index 0 doesn't exist but 1 does
                        mctrl.id = qctrl.id
                        fcntl.ioctl(vd, v4l2.VIDIOC_QUERYMENU, mctrl)
                        print("Menu name:", str(qctrl.name, encoding))
                        print("Menu option name:", str(mctrl.name, encoding))
                        print("Menu option index:", mctrl.index)
                        mctrl.index += 1
                    except:
                        mctrl.index += 1

        except:
            pass
        qctrl.id += 1
    vd.close()
コード例 #3
0
ファイル: example_ioctl.py プロジェクト: rborgese/camset
def read_base_capabalities():
    vd = open('/dev/video0', 'rb+', buffering=0)
    cp = v4l2.v4l2_capability()
    encoding = 'utf-8'

    # basic info
    fcntl.ioctl(vd, v4l2.VIDIOC_QUERYCAP, cp)
    print(str(cp.card, encoding))
    print(str(cp.driver, encoding))
    print("video capture device?\t",
          bool(cp.capabilities & v4l2.V4L2_CAP_VIDEO_CAPTURE))
    print("Supports read() call?\t",
          bool(cp.capabilities & v4l2.V4L2_CAP_READWRITE))
    print("Supports streaming?\t",
          bool(cp.capabilities & v4l2.V4L2_CAP_STREAMING))

    # current height, width
    qctrl = v4l2.v4l2_format()
    qctrl.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
    fcntl.ioctl(vd, v4l2.VIDIOC_G_FMT, qctrl)
    print("Width:", qctrl.fmt.pix.width)
    print("Height:", qctrl.fmt.pix.height)

    # output overview
    qctrl = v4l2.v4l2_fmtdesc()
    qctrl.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
    qctrl.index = 0
    fcntl.ioctl(vd, v4l2.VIDIOC_ENUM_FMT, qctrl)
    print("Format:", str(qctrl.description, encoding))
    print("Pixelformat ID:", qctrl.pixelformat)
    get_outputs(
        qctrl.pixelformat
    )  # pass pixelformat to read outputs, increase index for different codecs

    # main controls
    qctrl = v4l2.v4l2_queryctrl()
    mctrl = v4l2.v4l2_querymenu()
    vctrl = v4l2.v4l2_control()
    qctrl.id = v4l2.V4L2_CID_BASE
    mctrl.index = 0

    while qctrl.id < v4l2.V4L2_CID_LASTP1:  # LASTP1 is last item in CID_BASE
        try:
            vctrl.id = qctrl.id
            fcntl.ioctl(vd, v4l2.VIDIOC_QUERYCTRL, qctrl)
            fcntl.ioctl(vd, v4l2.VIDIOC_G_CTRL, vctrl)
            print("Control name:", str(qctrl.name, encoding))
            print("Control type, 1=int, 2=bool, 3=menu:", qctrl.type)
            '''
            There are more types, 4=BUTTON, 5=INTEGER64, 6=CTRL_CLASS, 7=STRING, 8=BITMASK,	9=INTEGER_MENU
            Not sure what to do with those, can't test
            '''
            print("Maximum:", qctrl.maximum)
            print("Minimum:", qctrl.minimum)
            print("Step:", qctrl.step)
            print("Default:", qctrl.default_value)
            print("Value:", vctrl.value)
            set_value(vctrl.id)  # test setting value
            '''
            if qctrl.type == 1: # int
                win.label = Gtk.Label(hexpand = True, vexpand = False)
                win.label.set_text(str(qctrl.name, encoding))
                win.label.set_size_request(-1, 35)
                win.label.set_halign(Gtk.Align.END)
                adj = Gtk.Adjustment(value = vctrl.value, lower = qctrl.minimum, upper = qctrl.maximum, step_increment = qctrl.step, page_increment = 5, page_size=0)
                win.scale = Gtk.Scale(orientation=Gtk.Orientation.HORIZONTAL, adjustment=adj)
                win.scale.set_digits(0)
                win.scale.set_value_pos(Gtk.PositionType.RIGHT)
                win.scale.set_size_request(-1, 35)
                win.scale.connect("value-changed", set_int_value, card, vctrl.id)
                win.intcontrolbox.pack_start(win.scale, False, False, 0)
                win.intlabelbox.pack_start(win.label, False, False, 0)
            '''
            if qctrl.type == 3:  # is menu
                while mctrl.index <= qctrl.maximum:
                    try:
                        mctrl.id = qctrl.id
                        fcntl.ioctl(vd, v4l2.VIDIOC_QUERYMENU, mctrl)
                        print("Menu name:", str(qctrl.name, encoding))
                        print("Menu option name:", str(mctrl.name, encoding))
                        print("Menu option index:", mctrl.index)
                        mctrl.index += 1
                    except:
                        mctrl.index += 1
        except:
            pass
        qctrl.id += 1
    vd.close()
コード例 #4
0
def get_device_controls_menu(fd, queryctrl):
    querymenu = v4l2.v4l2_querymenu(queryctrl.id, queryctrl.minimum)
    while querymenu.index <= queryctrl.maximum:
        ioctl(fd, v4l2.VIDIOC_QUERYMENU, querymenu)
        yield querymenu
        querymenu.index += 1
コード例 #5
0
ファイル: tests.py プロジェクト: Cobra-Kao/ropon
def get_device_controls_menu(fd, queryctrl):
    querymenu = v4l2.v4l2_querymenu(queryctrl.id, queryctrl.minimum)
    while querymenu.index <= queryctrl.maximum:
        ioctl(fd, v4l2.VIDIOC_QUERYMENU, querymenu)
        yield querymenu
        querymenu.index += 1