Пример #1
0
def get_device_controls(fd):
    # original enumeration method
    queryctrl = v4l2.v4l2_queryctrl(v4l2.V4L2_CID_BASE)
  
    while queryctrl.id < v4l2.V4L2_CID_LASTP1:
        try:
            fcntl.ioctl(fd, v4l2.VIDIOC_QUERYCTRL, queryctrl)
        except IOError, e:
            # this predefined control is not supported by this device
            assert e.errno == errno.EINVAL
            queryctrl.id += 1
            continue
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)
Пример #2
0
def _get_device_controls(self):
    # original enumeration method
    queryctrl = v4l2.v4l2_queryctrl(v4l2.V4L2_CID_BASE)

    while queryctrl.id < v4l2.V4L2_CID_LASTP1:
        try:
            ioctl(self.camera, v4l2.VIDIOC_QUERYCTRL, queryctrl)
        except IOError, e:
            # this predefined control is not supported by this device
            assert e.errno == errno.EINVAL
            queryctrl.id += 1
            continue
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)
Пример #3
0
    def _set_device_controls(self):
        queryctrl = v4l2.v4l2_queryctrl()
        queryctrl.id = self.CtrlId
        if fcntl.ioctl(self.camera, v4l2.VIDIOC_QUERYCTRL, queryctrl):
            print 'queryctrl.id:0x%x is not supprotted' % (queryctrl.id)
        else:
            print 'queryctrl id:0x%x,type:%d,name:%s,minimum:%d,maximum:%d,step:%d\n' % (
                queryctrl.id, queryctrl.type, queryctrl.name,
                queryctrl.minimum, queryctrl.maximum, queryctrl.step)

        ctrl = v4l2.v4l2_control()
        ctrl.id = self.CtrlId
        if fcntl.ioctl(self.camera, v4l2.VIDIOC_G_CTRL, ctrl):
            print 'ctrl.id:0x%x is not supprotted' % (ctrl.id)
        else:
            print 'Get current control...id:0x%x,valus:%d\n' % (ctrl.id,
                                                                ctrl.value)

        ctrl = v4l2.v4l2_control()
        ctrl.id = self.CtrlId
        ctrl.value = self.CtrlValue
        if fcntl.ioctl(self.camera, v4l2.VIDIOC_S_CTRL, ctrl):
            print 'ctrl.id:0x%x is not supprotted' % (ctrl.id)
        else:
            print 'Set control...id:0x%x,valus:%d\n' % (ctrl.id, ctrl.value)

        ctrl = v4l2.v4l2_control()
        ctrl.id = self.CtrlId
        if fcntl.ioctl(self.camera, v4l2.VIDIOC_G_CTRL, ctrl):
            print 'ctrl.id:0x%x is not supprotted' % (ctrl.id)
        else:
            print 'Check current control...id:0x%x,valus:%d\n' % (ctrl.id,
                                                                  ctrl.value)
Пример #4
0
def get_device_controls_by_class(fd, control_class):
    # enumeration by control class
    queryctrl = v4l2.v4l2_queryctrl(control_class
                                    | v4l2.V4L2_CTRL_FLAG_NEXT_CTRL)

    while True:
        try:
            fcntl.ioctl(fd, v4l2.VIDIOC_QUERYCTRL, queryctrl)
        except IOError, e:
            assert e.errno == errno.EINVAL
            break
        if (v4l2.V4L2_CTRL_ID2CLASS(queryctrl.id) != control_class):
            break
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id
                                        | v4l2.V4L2_CTRL_FLAG_NEXT_CTRL)
Пример #5
0
def get_device_controls_by_class(fd, control_class):
    # enumeration by control class
    queryctrl = v4l2.v4l2_queryctrl(
        control_class | v4l2.V4L2_CTRL_FLAG_NEXT_CTRL)

    while True:
        try:
            ioctl(fd, v4l2.VIDIOC_QUERYCTRL, queryctrl)
        except IOError, e:
            assert e.errno == errno.EINVAL
            break
        if (v4l2.V4L2_CTRL_ID2CLASS(queryctrl.id) != control_class):
            break
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(
            queryctrl.id | v4l2.V4L2_CTRL_FLAG_NEXT_CTRL)
Пример #6
0
 def camera_info(self):
     # Log capability info
     cp = v4l2.v4l2_capability() 
     ioctl(self.vd, v4l2.VIDIOC_QUERYCAP, cp) 
     self.logger.debug("driver: " + cp.driver.decode())
     self.logger.debug("card: " + cp.card.decode())
     self.driver = cp.driver.decode()
     self.card = cp.card.decode()
     
     # Log controls available
     queryctrl = v4l2.v4l2_queryctrl(v4l2.V4L2_CID_BASE)
     while queryctrl.id < v4l2.V4L2_CID_LASTP1:
         try:
             ioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, queryctrl)
         except IOError as e:
             # this predefined control is not supported by this device
             assert e.errno == errno.EINVAL
             queryctrl.id += 1
             continue
         self.logger.debug("Camera control: " + queryctrl.name.decode())
         queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)
     queryctrl.id = v4l2.V4L2_CID_PRIVATE_BASE
     while True:
         try:
             ioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, queryctrl)
         except IOError as e:
             # no more custom controls available on this device
             assert e.errno == errno.EINVAL
             break
         self.logger.debug("Camera control: " + queryctrl.name.decode())
         queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)
     
     # Log formats available
     capture = v4l2.v4l2_fmtdesc()
     capture.index = 0
     capture.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
     try:
         while (ioctl(self.vd, v4l2.VIDIOC_ENUM_FMT, capture) >= 0):
                 self.logger.debug("Camera format: " + capture.description.decode())
                 capture.index += 1
     except:
         pass
Пример #7
0
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
Пример #8
0
def query_v4l2_ctrls(dev):
    ctrls = []

    ctrl = v4l2.v4l2_queryctrl()
    ctrl.id = v4l2.V4L2_CID_BASE

    while True:
        try:
            fcntl.ioctl(dev, v4l2.VIDIOC_QUERYCTRL, ctrl)
        except Exception:
            return ctrls

        if not ctrl.flags & v4l2.V4L2_CTRL_FLAG_DISABLED and \
                ctrl.type in \
                SUPPORTED_CTRL_TYPES:
            ctrls.append(ctrl)

            ctrl = v4l2.v4l2_queryctrl()
            ctrl.id = ctrls[-1].id

        ctrl.id |= v4l2.V4L2_CTRL_FLAG_NEXT_CTRL

    return ctrls
Пример #9
0
    def EnumerateControls(self):
        self.dictValidControls = dict()
        qc = v4l2.v4l2_queryctrl()
        qc.id = v4l2.V4L2_CTRL_CLASS_USER | v4l2.V4L2_CTRL_FLAG_NEXT_CTRL
        if self.verbose:
            print '--EnumerateControls'
        for i in range(20):  #while True:
            try:
                xioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, qc)
            except:
                break
            if self.verbose:
                print '  +', i, ':', qc.id, qc.name, qc.type, qc.flags

            if qc.flags == v4l2.V4L2_CTRL_FLAG_DISABLED:
                continue
            if qc.type == v4l2.V4L2_CTRL_TYPE_MENU:
                print 'sdkim Todo enumerate_control_menu() '
            self.dictValidControls[qc.name] = qc.id
            qc.id |= v4l2.V4L2_CTRL_FLAG_NEXT_CTRL
        return self.dictValidControls
Пример #10
0
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()
Пример #11
0
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()
Пример #12
0
            assert e.errno == errno.EINVAL
            queryctrl.id += 1
            continue
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)

    queryctrl.id = v4l2.V4L2_CID_PRIVATE_BASE
    while True:
        try:
            ioctl(self.camera, v4l2.VIDIOC_QUERYCTRL, queryctrl)
        except IOError, e:
            # no more custom controls available on this device
            assert e.errno == errno.EINVAL
            break
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)

    def _init_camera(self):
        print 'Initialize camera devices ...'
        self._open_devices()

    def start(self):
        self.gameOn = True
        self._init_camera()
        while self.gameOn:
            ret, self.currentFrame['content'] = self.camera.read()

            if ret:
                self.currentFrame['content'] = cv2.resize(
                    src=self.currentFrame['content'],
                    dsize=config.imageOperatingSize)
Пример #13
0
    def __init__(self):
        self.W = 1920
        self.H = 1080
        self.controls = {}
        #open
        l.debug("open")
        self.vd = open('/dev/video0', 'rb+', buffering=0)

        #queryctrl/g_ctrl
        qctrl = v4l2.v4l2_queryctrl()
        ctrl = v4l2.v4l2_control()
        #brightness
        qctrl.id = v4l2.V4L2_CID_BRIGHTNESS
        try:
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, qctrl)
            ctrl.id = qctrl.id
            fcntl.ioctl(self.vd, v4l2.VIDIOC_G_CTRL, ctrl)
        except:
            l.error("QUERYCTRL/G_CTRL failed")
        self.controls["brightness"] = (ctrl.id, ctrl.value, qctrl.minimum,
                                       qctrl.maximum)
        #exposure
        qctrl.id = v4l2.V4L2_CID_EXPOSURE_ABSOLUTE
        try:
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, qctrl)
            ctrl.id = qctrl.id
            fcntl.ioctl(self.vd, v4l2.VIDIOC_G_CTRL, ctrl)
        except:
            l.error("QUERYCTRL/G_CTRL failed")
        self.controls["exposure"] = (ctrl.id, ctrl.value, qctrl.minimum,
                                     qctrl.maximum)

        #querycap
        l.debug("querycap")
        cp = v4l2.v4l2_capability()
        fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYCAP, cp)

        #s_fmt
        l.debug("s_fmt")
        fmt = v4l2.v4l2_format()
        fmt.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
        fmt.fmt.pix.width = self.W
        fmt.fmt.pix.height = self.H
        fmt.fmt.pix.pixelformat = v4l2.V4L2_PIX_FMT_SBGGR10
        fmt.fmt.pix.field = v4l2.V4L2_FIELD_NONE
        fcntl.ioctl(self.vd, v4l2.VIDIOC_S_FMT, fmt)

        #g_fmt
        fmt = v4l2.v4l2_format()
        fmt.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
        fcntl.ioctl(self.vd, v4l2.VIDIOC_G_FMT, fmt)
        self.framesize = fmt.fmt.pix.sizeimage

        #reqbufs
        l.debug("reqbufs")
        req = v4l2.v4l2_requestbuffers()
        req.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
        req.memory = v4l2.V4L2_MEMORY_MMAP
        req.count = 4
        fcntl.ioctl(self.vd, v4l2.VIDIOC_REQBUFS, req)

        self.buffers = []
        for ind in range(req.count):
            #querybufs
            buf = v4l2.v4l2_buffer()
            buf.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
            buf.memory = v4l2.V4L2_MEMORY_MMAP
            buf.index = ind
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYBUF, buf)

            #mmap
            mm = mmap.mmap(self.vd.fileno(),
                           buf.length,
                           mmap.MAP_SHARED,
                           mmap.PROT_READ | mmap.PROT_WRITE,
                           offset=buf.m.offset)
            self.buffers.append(mm)

            #qbuf
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QBUF, buf)

        #streamon
        l.debug("streamon")
        buf_type = v4l2.v4l2_buf_type(v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE)
        fcntl.ioctl(self.vd, v4l2.VIDIOC_STREAMON, buf_type)

        #select
        l.debug("select")
        t0 = time.time()
        max_t = 1
        ready_to_read, ready_to_write, in_error = ([], [], [])
        while len(ready_to_read) == 0 and time.time() - t0 < max_t:
            ready_to_read, ready_to_write, in_error = select.select([self.vd],
                                                                    [], [],
                                                                    max_t)
Пример #14
0
    def __init__(self):
        self.W = 1920
        self.H = 1080
        self.controls = {}
        #open
        l.debug("open")
        self.vd = open('/dev/video0', 'rb+', buffering=0)

        #queryctrl/g_ctrl
        qctrl = v4l2.v4l2_queryctrl()
        ctrl = v4l2.v4l2_control()
        #brightness
        qctrl.id = v4l2.V4L2_CID_BRIGHTNESS
        try:
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, qctrl)
            ctrl.id = qctrl.id
            fcntl.ioctl(self.vd, v4l2.VIDIOC_G_CTRL, ctrl)
        except:
            l.error("QUERYCTRL/G_CTRL failed")
        self.controls["brightness"] = (ctrl.id, ctrl.value, qctrl.minimum, qctrl.maximum)
        #exposure
        qctrl.id = v4l2.V4L2_CID_EXPOSURE_ABSOLUTE
        try:
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYCTRL, qctrl)
            ctrl.id = qctrl.id
            fcntl.ioctl(self.vd, v4l2.VIDIOC_G_CTRL, ctrl)
        except:
            l.error("QUERYCTRL/G_CTRL failed")
        self.controls["exposure"] = (ctrl.id, ctrl.value, qctrl.minimum, qctrl.maximum)

        #querycap
        l.debug("querycap")
        cp = v4l2.v4l2_capability()
        fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYCAP, cp)

        #s_fmt
        l.debug("s_fmt")
        fmt = v4l2.v4l2_format()
        fmt.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
        fmt.fmt.pix.width = self.W
        fmt.fmt.pix.height = self.H
        fmt.fmt.pix.pixelformat = v4l2.V4L2_PIX_FMT_SBGGR10
        fmt.fmt.pix.field = v4l2.V4L2_FIELD_NONE
        fcntl.ioctl(self.vd, v4l2.VIDIOC_S_FMT, fmt)

        #g_fmt
        fmt = v4l2.v4l2_format()
        fmt.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
        fcntl.ioctl(self.vd, v4l2.VIDIOC_G_FMT, fmt)
        self.framesize = fmt.fmt.pix.sizeimage

        #reqbufs
        l.debug("reqbufs")
        req = v4l2.v4l2_requestbuffers()
        req.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
        req.memory = v4l2.V4L2_MEMORY_MMAP
        req.count = 4
        fcntl.ioctl(self.vd, v4l2.VIDIOC_REQBUFS, req)

        self.buffers = []
        for ind in range(req.count):
            #querybufs
            buf = v4l2.v4l2_buffer()
            buf.type = v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE
            buf.memory = v4l2.V4L2_MEMORY_MMAP
            buf.index = ind
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QUERYBUF, buf)

            #mmap
            mm = mmap.mmap(self.vd.fileno(), buf.length, mmap.MAP_SHARED, mmap.PROT_READ | mmap.PROT_WRITE, offset=buf.m.offset)
            self.buffers.append(mm)

            #qbuf
            fcntl.ioctl(self.vd, v4l2.VIDIOC_QBUF, buf)

        #streamon
        l.debug("streamon")
        buf_type = v4l2.v4l2_buf_type(v4l2.V4L2_BUF_TYPE_VIDEO_CAPTURE)
        fcntl.ioctl(self.vd, v4l2.VIDIOC_STREAMON, buf_type)

        #select
        l.debug("select")
        t0 = time.time()
        max_t = 1
        ready_to_read, ready_to_write, in_error = ([], [], [])
        while len(ready_to_read) == 0 and time.time() - t0 < max_t:
            ready_to_read, ready_to_write, in_error = select.select([self.vd], [], [], max_t)
Пример #15
0
    def __init__(self, primary_text, v4l2_control = False,
            v4l2_auto_control = False):
        Palette.__init__(self, label=primary_text)

        vbox = gtk.VBox()
        self.set_content(vbox)
        vbox.show()

        if v4l2_control:
            self._query_control = v4l2.v4l2_queryctrl(v4l2_control)
            self._control = v4l2.v4l2_control(v4l2_control)

            ioctl(VD, v4l2.VIDIOC_QUERYCTRL, self._query_control)
            ioctl(VD, v4l2.VIDIOC_G_CTRL, self._control)

            _max = self._query_control.maximum
            _min = self._query_control.minimum

            if v4l2_control == v4l2.V4L2_CID_EXPOSURE:
                _min = 0
                _max = 512
            elif v4l2_control == v4l2.V4L2_CID_GAIN:
                _min = 0
                _max = 37
            elif v4l2_control == v4l2.V4L2_CID_CONTRAST:
                _min = 0
                _max = 127
            elif v4l2_control == v4l2.V4L2_CID_BRIGHTNESS:
                _min = 0
                _max = 255
            #elif v4l2_control == v4l2.V4L2_CID_NIGHT_MODE:
            #    _min = 0
            #    _max = 1

            self._adjustment = gtk.Adjustment(value=self._control.value,
                    lower=_min,
                    upper=_max,
                    step_incr=1, page_incr=1, page_size=0)

            self._hscale = gtk.HScale(self._adjustment)
            self._hscale.set_digits(0)
            self._hscale.set_draw_value(False)
            self._hscale.set_update_policy(gtk.UPDATE_DISCONTINUOUS)
            vbox.add(self._hscale)
            self._hscale.show()

            self._adjustment_handler_id = \
                self._adjustment.connect('value_changed',
                                         self.__adjustment_changed_cb)

            if v4l2_auto_control:
                self._auto_query_control =\
                    v4l2.v4l2_queryctrl(v4l2_auto_control)
                self._auto_control = v4l2.v4l2_control(v4l2_auto_control)

                self._auto_button = gtk.CheckButton('Auto')
                self._auto_button.set_active(self._auto_control.value)
                self._auto_button.connect('toggled',
                        self.__auto_button_toggled_cb)
                vbox.add(self._auto_button)
                self._auto_button.show()

                if self._auto_control.value == True:
                    self._hscale.set_sensitive(False)

        vbox.show()
Пример #16
0
            assert e.errno == errno.EINVAL
            queryctrl.id += 1
            continue
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)
  
    queryctrl.id = v4l2.V4L2_CID_PRIVATE_BASE
    while True:
        try:
            fcntl.ioctl(fd, v4l2.VIDIOC_QUERYCTRL, queryctrl)
        except IOError, e:
            # no more custom controls available on this device
            assert e.errno == errno.EINVAL
            break
        yield queryctrl
        queryctrl = v4l2.v4l2_queryctrl(queryctrl.id + 1)

'''
Control: Red Balance
  Range: 0 - 1023
Control: Blue Balance
  Range: 0 - 1023
Control: Gain
  Range: 0 - 511
Control: Exposure
  Range: 0 - 800
'''

# Return name of all controls
def ctrls(fd):
    ret = []