[1722*android_usbfs.c:2878:handle_control_completion]:LIBUSB_TRANSFER_STALL

[CodeGather]

// 设置参数
    public int setValue(final int flag, final int value) {
        checkReleased();
        final CameraThread thread = mWeakThread.get();
        final UVCCamera camera = thread != null ? thread.mUVCCamera : null;
        if (camera != null) {
            if (flag == UVCCamera.PU_BRIGHTNESS) {
                camera.setBrightness(value);
                return camera.getBrightness();
            } else if (flag == UVCCamera.PU_CONTRAST) {
                camera.setContrast(value);
                return camera.getContrast();
            } else if (flag == UVCCamera.CTRL_FOCUS_ABS) {
                camera.setFocus(value);
                return camera.getFocus();
            }
        }
        throw new IllegalStateException();
    }



I/UVCCamera: controlSupports=2202e
I/UVCCamera: D0:  Scanning Mode=disabled
    D1:  Auto-Exposure Mode=enabled
    D2:  Auto-Exposure Priority=enabled
    D3:  Exposure Time (Absolute)=enabled
    D4:  Exposure Time (Relative)=disabled
    D5:  Focus (Absolute)=enabled
    D6:  Focus (Relative)=disabled
    D7:  Iris (Absolute)=disabled
    D8:  Iris (Relative)=disabled
    D9:  Zoom (Absolute)=disabled
    D10: Zoom (Relative)=disabled
    D11: PanTilt (Absolute)=disabled
    D12: PanTilt (Relative)=disabled
I/UVCCamera: D13: Roll (Absolute)=enabled
    D14: Roll (Relative)=disabled
    D15: Reserved=disabled
    D16: Reserved=disabled
    D17: Focus, Auto=enabled
    D18: Privacy=disabled
    D19: Focus, Simple=disabled
    D20: Window=disabled
    D21: Region of Interest=disabled
    D22: Reserved, set to zero=disabled
    D23: Reserved, set to zero=disabled
I/UVCCamera: procSupports=177f
    D0: Brightness=enabled
    D1: Contrast=enabled
    D2: Hue=enabled
    D3: Saturation=enabled
    D4: Sharpness=enabled
I/UVCCamera: D5: Gamma=enabled
    D6: White Balance Temperature=enabled
    D7: White Balance Component=disabled
    D8: Backlight Compensation=enabled
    D9: Gain=enabled
    D10: Power Line Frequency=enabled
    D11: Hue, Auto=disabled
    D12: White Balance Temperature, Auto=enabled
    D13: White Balance Component, Auto=disabled
    D14: Digital Multiplier=disabled
    D15: Digital Multiplier Limit=disabled
    D16: Analog Video Standard=disabled
    D17: Analog Video Lock Status=disabled
    D18: Contrast, Auto=disabled
    D19: Reserved. Set to zero=disabled
    D20: Reserved. Set to zero=disabled
    D21: Reserved. Set to zero=disabled
I/UVCCamera: D22: Reserved. Set to zero=disabled
    D23: Reserved. Set to zero=disabled
V/UVCCamera: Brightness:min=-64,max=64,def=0
V/UVCCamera: Contrast:min=0,max=100,def=36
V/UVCCamera: Sharpness:min=0,max=100,def=6
V/UVCCamera: Gain:min=0,max=65535,def=1
V/UVCCamera: Gamma:min=100,max=500,def=300
V/UVCCamera: Saturation:min=0,max=100,def=56
V/UVCCamera: Hue:min=-180,max=180,def=0
V/UVCCamera: Zoom:min=0,max=0,def=0
V/UVCCamera: WhiteBlance:min=2800,max=6500,def=4600
V/UVCCamera: Focus:min=0,max=1023,def=68


然后设置 Focus 时 出现如下错误
[1722*android_usbfs.c:2878:handle_control_completion]:LIBUSB_TRANSFER_STALL