USB描述符存储在设备EEPROM中，枚举时主机向设备发送GetDescriptor请求，设备收到请求后，将描述符信息返回给主机，主机分析返回来数据，判断出设备类型后建立相应数据链接通道
描述符是用来描述自身信息的格式化的数据
Descriptor Hierarchy
This USB camera device uses a Video Interface Collection that includes the VideoControl interface (interface 0) and a single VideoStreaming interface (interface 1). The VideoStreaming interface features two alternate settings. The first alternate setting (0) has zero bandwidth associated with it (implied by the lack of an isochronous endpoint), so switching to this alternate setting frees all allocated bandwidth on the USB for this device. Alternate setting 1 is the operational part of the interface and contains the isochronous endpoint to supply the host with video data.
This figure presents the descriptor hierarchy.

——————/
据VC可找到从属于其的VS
插上摄像头——rmmod uvcvideo——insmod myuvc.ko
仿照lsusb.c写
id_table：VC、VS，打印两次设备描述符，内容同
——————/IAD接口联合描述符，p45
A device must use an Interface Association Descriptor to describe a Video Interface Collection for each device function that requires a VideoControl Interface and one or more VideoStreaming interfaces.
重要成员bFirstinterface、bInterfaceConut
struct usb_host_config——struct usb_interface_assoc_descriptor(老版内核无该项)
——————/接口描述符
C930e的VC仅1种设置，VS有12种设置
——————/UVC规范自定义描述符
了解EU，看厂家数据手册，uvc psec无定义

root@lyl:/# lsusb -v -d 046d:0843Bus 001 Device 022: ID 046d:0843 Logitech, Inc.
Device Descriptor:bLength                18bDescriptorType         1bcdUSB               2.00bDeviceClass          239 Miscellaneous DevicebDeviceSubClass         2 ?bDeviceProtocol         1 Interface AssociationbMaxPacketSize0        64idVendor           0x046d Logitech, Inc.idProduct          0x0843 bcdDevice            0.13iManufacturer           0 iProduct                2 Logitech Webcam C930eiSerial                 1 511DBF9EbNumConfigurations      1Configuration Descriptor:bLength                 9bDescriptorType         2wTotalLength         2547bNumInterfaces          4bConfigurationValue     1iConfiguration          0 bmAttributes         0x80(Bus Powered)MaxPower              500mAInterface Association:bLength                 8bDescriptorType        11bFirstInterface         0bInterfaceCount         2bFunctionClass         14 VideobFunctionSubClass       3 Video Interface CollectionbFunctionProtocol       0 iFunction               0 Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        0bAlternateSetting       0bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      1 Video ControlbInterfaceProtocol      0 iInterface              0 VideoControl Interface Descriptor:bLength                13bDescriptorType        36bDescriptorSubtype      1 (HEADER)bcdUVC               1.00wTotalLength          215dwClockFrequency       30.000000MHzbInCollection           1baInterfaceNr( 0)       1VideoControl Interface Descriptor:bLength                18bDescriptorType        36bDescriptorSubtype      2 (INPUT_TERMINAL)bTerminalID             1wTerminalType      0x0201 Camera SensorbAssocTerminal          0iTerminal               0 wObjectiveFocalLengthMin      0wObjectiveFocalLengthMax      0wOcularFocalLength            0bControlSize                  3bmControls           0x00020a2eAuto-Exposure ModeAuto-Exposure PriorityExposure Time (Absolute)Focus (Absolute)Zoom (Absolute)PanTilt (Absolute)Focus, AutoVideoControl Interface Descriptor:bLength                11bDescriptorType        36bDescriptorSubtype      5 (PROCESSING_UNIT)Warning: Descriptor too shortbUnitID                 3bSourceID               1wMaxMultiplier      16384bControlSize            2bmControls     0x0000175bBrightnessContrastSaturationSharpnessWhite Balance TemperatureBacklight CompensationGainPower Line FrequencyWhite Balance Temperature, AutoiProcessing             0 bmVideoStandards     0x1bNoneNTSC - 525/60SECAM - 625/50NTSC - 625/50VideoControl Interface Descriptor:bLength                27bDescriptorType        36bDescriptorSubtype      6 (EXTENSION_UNIT)bUnitID                 6guidExtensionCode         {d09ee423-7811-314f-ae52-d2fb8a8d3b48}bNumControl            10bNrPins                 1baSourceID( 0)          3bControlSize            2bmControls( 0)       0xffbmControls( 1)       0x03iExtension              0 VideoControl Interface Descriptor:bLength                27bDescriptorType        36bDescriptorSubtype      6 (EXTENSION_UNIT)bUnitID                 8guidExtensionCode         {e48e6769-0f41-db40-a850-7420d7d8240e}bNumControl             7bNrPins                 1baSourceID( 0)          3bControlSize            2bmControls( 0)       0x3bbmControls( 1)       0x03iExtension              0 VideoControl Interface Descriptor:bLength                28bDescriptorType        36bDescriptorSubtype      6 (EXTENSION_UNIT)bUnitID                 9guidExtensionCode         {a94c5d1f-11de-8744-840d-50933c8ec8d1}bNumControl            16bNrPins                 1baSourceID( 0)          8bControlSize            3bmControls( 0)       0xf3bmControls( 1)       0xffbmControls( 2)       0x03iExtension              0 VideoControl Interface Descriptor:bLength                27bDescriptorType        36bDescriptorSubtype      6 (EXTENSION_UNIT)bUnitID                10guidExtensionCode         {1502e449-34f4-fe47-b158-0e885023e51b}bNumControl             7bNrPins                 1baSourceID( 0)          9bControlSize            2bmControls( 0)       0xaabmControls( 1)       0x0fiExtension              0 VideoControl Interface Descriptor:bLength                28bDescriptorType        36bDescriptorSubtype      6 (EXTENSION_UNIT)bUnitID                11guidExtensionCode         {212de5ff-3080-2c4e-82d9-f587d00540bd}bNumControl             3bNrPins                 1baSourceID( 0)         10bControlSize            3bmControls( 0)       0x00bmControls( 1)       0x41bmControls( 2)       0x01iExtension              0 VideoControl Interface Descriptor:bLength                27bDescriptorType        36bDescriptorSubtype      6 (EXTENSION_UNIT)bUnitID                12guidExtensionCode         {41769ea2-04de-e347-8b2b-f4341aff003b}bNumControl            11bNrPins                 1baSourceID( 0)          3bControlSize            2bmControls( 0)       0x07bmControls( 1)       0x7fiExtension              0 VideoControl Interface Descriptor:bLength                 9bDescriptorType        36bDescriptorSubtype      3 (OUTPUT_TERMINAL)bTerminalID             4wTerminalType      0x0101 USB StreamingbAssocTerminal          0bSourceID               3iTerminal               0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x86  EP 6 INbmAttributes            3Transfer Type            InterruptSynch Type               NoneUsage Type               DatawMaxPacketSize     0x0040  1x 64 bytesbInterval               8Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       0bNumEndpoints           0bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 VideoStreaming Interface Descriptor:bLength                            15bDescriptorType                    36bDescriptorSubtype                  1 (INPUT_HEADER)bNumFormats                         2wTotalLength                     1873bEndPointAddress                  129bmInfo                              0bTerminalLink                       4bStillCaptureMethod                 0bTriggerSupport                     0bTriggerUsage                       0bControlSize                        1bmaControls( 0)                    27bmaControls( 1)                    27VideoStreaming Interface Descriptor:bLength                            27bDescriptorType                    36bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)bFormatIndex                        1bNumFrameDescriptors               19guidFormat                            {59555932-0000-1000-8000-00aa00389b71}bBitsPerPixel                      16bDefaultFrameIndex                  1bAspectRatioX                       0bAspectRatioY                       0bmInterlaceFlags                 0x00Interlaced stream or variable: NoFields per frame: 2 fieldsField 1 first: NoField pattern: Field 1 onlybCopyProtect                      0VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         1bmCapabilities                   0x00Still image unsupportedwWidth                            640wHeight                           480dwMinBitRate                 24576000dwMaxBitRate                147456000dwMaxVideoFrameBufferSize      614400dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         2bmCapabilities                   0x00Still image unsupportedwWidth                            160wHeight                           120dwMinBitRate                  1536000dwMaxBitRate                  9216000dwMaxVideoFrameBufferSize       38400dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         3bmCapabilities                   0x00Still image unsupportedwWidth                            176wHeight                           144dwMinBitRate                  2027520dwMaxBitRate                 12165120dwMaxVideoFrameBufferSize       50688dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         4bmCapabilities                   0x00Still image unsupportedwWidth                            320wHeight                           180dwMinBitRate                  4608000dwMaxBitRate                 27648000dwMaxVideoFrameBufferSize      115200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         5bmCapabilities                   0x00Still image unsupportedwWidth                            320wHeight                           240dwMinBitRate                  6144000dwMaxBitRate                 36864000dwMaxVideoFrameBufferSize      153600dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         6bmCapabilities                   0x00Still image unsupportedwWidth                            352wHeight                           288dwMinBitRate                  8110080dwMaxBitRate                 48660480dwMaxVideoFrameBufferSize      202752dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         7bmCapabilities                   0x00Still image unsupportedwWidth                            424wHeight                           240dwMinBitRate                  8140800dwMaxBitRate                 48844800dwMaxVideoFrameBufferSize      203520dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         8bmCapabilities                   0x00Still image unsupportedwWidth                            480wHeight                           270dwMinBitRate                 10368000dwMaxBitRate                 62208000dwMaxVideoFrameBufferSize      259200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                         9bmCapabilities                   0x00Still image unsupportedwWidth                            640wHeight                           360dwMinBitRate                 18432000dwMaxBitRate                110592000dwMaxVideoFrameBufferSize      460800dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        10bmCapabilities                   0x00Still image unsupportedwWidth                            800wHeight                           448dwMinBitRate                 28672000dwMaxBitRate                172032000dwMaxVideoFrameBufferSize      716800dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            50bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        11bmCapabilities                   0x00Still image unsupportedwWidth                            800wHeight                           600dwMinBitRate                 38400000dwMaxBitRate                184320000dwMaxVideoFrameBufferSize      960000dwDefaultFrameInterval         416666bFrameIntervalType                  6dwFrameInterval( 0)            416666dwFrameInterval( 1)            500000dwFrameInterval( 2)            666666dwFrameInterval( 3)           1000000dwFrameInterval( 4)           1333333dwFrameInterval( 5)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        12bmCapabilities                   0x00Still image unsupportedwWidth                            848wHeight                           480dwMinBitRate                 32563200dwMaxBitRate                195379200dwMaxVideoFrameBufferSize      814080dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            42bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        13bmCapabilities                   0x00Still image unsupportedwWidth                            960wHeight                           540dwMinBitRate                 41472000dwMaxBitRate                124416000dwMaxVideoFrameBufferSize     1036800dwDefaultFrameInterval         666666bFrameIntervalType                  4dwFrameInterval( 0)            666666dwFrameInterval( 1)           1000000dwFrameInterval( 2)           1333333dwFrameInterval( 3)           2000000VideoStreaming Interface Descriptor:bLength                            42bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        14bmCapabilities                   0x00Still image unsupportedwWidth                           1024wHeight                           576dwMinBitRate                 47185920dwMaxBitRate                141557760dwMaxVideoFrameBufferSize     1179648dwDefaultFrameInterval         666666bFrameIntervalType                  4dwFrameInterval( 0)            666666dwFrameInterval( 1)           1000000dwFrameInterval( 2)           1333333dwFrameInterval( 3)           2000000VideoStreaming Interface Descriptor:bLength                            38bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        15bmCapabilities                   0x00Still image unsupportedwWidth                           1280wHeight                           720dwMinBitRate                 73728000dwMaxBitRate                147456000dwMaxVideoFrameBufferSize     1843200dwDefaultFrameInterval        1000000bFrameIntervalType                  3dwFrameInterval( 0)           1000000dwFrameInterval( 1)           1333333dwFrameInterval( 2)           2000000VideoStreaming Interface Descriptor:bLength                            34bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        16bmCapabilities                   0x00Still image unsupportedwWidth                           1600wHeight                           896dwMinBitRate                114688000dwMaxBitRate                172032000dwMaxVideoFrameBufferSize     2867200dwDefaultFrameInterval        1333333bFrameIntervalType                  2dwFrameInterval( 0)           1333333dwFrameInterval( 1)           2000000VideoStreaming Interface Descriptor:bLength                            30bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        17bmCapabilities                   0x00Still image unsupportedwWidth                           1920wHeight                          1080dwMinBitRate                165888000dwMaxBitRate                165888000dwMaxVideoFrameBufferSize     4147200dwDefaultFrameInterval        2000000bFrameIntervalType                  1dwFrameInterval( 0)           2000000VideoStreaming Interface Descriptor:bLength                            30bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        18bmCapabilities                   0x00Still image unsupportedwWidth                           2304wHeight                          1296dwMinBitRate                238878720dwMaxBitRate                238878720dwMaxVideoFrameBufferSize     5971968dwDefaultFrameInterval        4999998bFrameIntervalType                  1dwFrameInterval( 0)           4999998VideoStreaming Interface Descriptor:bLength                            30bDescriptorType                    36bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)bFrameIndex                        19bmCapabilities                   0x00Still image unsupportedwWidth                           2304wHeight                          1536dwMinBitRate                283115520dwMaxBitRate                283115520dwMaxVideoFrameBufferSize     7077888dwDefaultFrameInterval        4999998bFrameIntervalType                  1dwFrameInterval( 0)           4999998VideoStreaming Interface Descriptor:bLength                             6bDescriptorType                    36bDescriptorSubtype                 13 (COLORFORMAT)bColorPrimaries                     1 (BT.709,sRGB)bTransferCharacteristics            1 (BT.709)bMatrixCoefficients                 4 (SMPTE 170M (BT.601))VideoStreaming Interface Descriptor:bLength                            11bDescriptorType                    36bDescriptorSubtype                  6 (FORMAT_MJPEG)bFormatIndex                        2bNumFrameDescriptors               17bFlags                              1Fixed-size samples: YesbDefaultFrameIndex                  1bAspectRatioX                       0bAspectRatioY                       0bmInterlaceFlags                 0x00Interlaced stream or variable: NoFields per frame: 1 fieldsField 1 first: NoField pattern: Field 1 onlybCopyProtect                      0VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         1bmCapabilities                   0x00Still image unsupportedwWidth                            640wHeight                           480dwMinBitRate                 24576000dwMaxBitRate                147456000dwMaxVideoFrameBufferSize      614400dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         2bmCapabilities                   0x00Still image unsupportedwWidth                            160wHeight                           120dwMinBitRate                  1536000dwMaxBitRate                  9216000dwMaxVideoFrameBufferSize       38400dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         3bmCapabilities                   0x00Still image unsupportedwWidth                            176wHeight                           144dwMinBitRate                  2027520dwMaxBitRate                 12165120dwMaxVideoFrameBufferSize       50688dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         4bmCapabilities                   0x00Still image unsupportedwWidth                            320wHeight                           180dwMinBitRate                  4608000dwMaxBitRate                 27648000dwMaxVideoFrameBufferSize      115200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         5bmCapabilities                   0x00Still image unsupportedwWidth                            320wHeight                           240dwMinBitRate                  6144000dwMaxBitRate                 36864000dwMaxVideoFrameBufferSize      153600dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         6bmCapabilities                   0x00Still image unsupportedwWidth                            352wHeight                           288dwMinBitRate                  8110080dwMaxBitRate                 48660480dwMaxVideoFrameBufferSize      202752dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         7bmCapabilities                   0x00Still image unsupportedwWidth                            424wHeight                           240dwMinBitRate                  8140800dwMaxBitRate                 48844800dwMaxVideoFrameBufferSize      203520dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         8bmCapabilities                   0x00Still image unsupportedwWidth                            480wHeight                           270dwMinBitRate                 10368000dwMaxBitRate                 62208000dwMaxVideoFrameBufferSize      259200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                         9bmCapabilities                   0x00Still image unsupportedwWidth                            640wHeight                           360dwMinBitRate                 18432000dwMaxBitRate                110592000dwMaxVideoFrameBufferSize      460800dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        10bmCapabilities                   0x00Still image unsupportedwWidth                            800wHeight                           448dwMinBitRate                 28672000dwMaxBitRate                172032000dwMaxVideoFrameBufferSize      716800dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        11bmCapabilities                   0x00Still image unsupportedwWidth                            800wHeight                           600dwMinBitRate                 38400000dwMaxBitRate                230400000dwMaxVideoFrameBufferSize      960000dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        12bmCapabilities                   0x00Still image unsupportedwWidth                            848wHeight                           480dwMinBitRate                 32563200dwMaxBitRate                195379200dwMaxVideoFrameBufferSize      814080dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        13bmCapabilities                   0x00Still image unsupportedwWidth                            960wHeight                           540dwMinBitRate                 41472000dwMaxBitRate                248832000dwMaxVideoFrameBufferSize     1036800dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        14bmCapabilities                   0x00Still image unsupportedwWidth                           1024wHeight                           576dwMinBitRate                 47185920dwMaxBitRate                283115520dwMaxVideoFrameBufferSize     1179648dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        15bmCapabilities                   0x00Still image unsupportedwWidth                           1280wHeight                           720dwMinBitRate                 73728000dwMaxBitRate                442368000dwMaxVideoFrameBufferSize     1843200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        16bmCapabilities                   0x00Still image unsupportedwWidth                           1600wHeight                           896dwMinBitRate                114688000dwMaxBitRate                688128000dwMaxVideoFrameBufferSize     2867200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                            54bDescriptorType                    36bDescriptorSubtype                  7 (FRAME_MJPEG)bFrameIndex                        17bmCapabilities                   0x00Still image unsupportedwWidth                           1920wHeight                          1080dwMinBitRate                165888000dwMaxBitRate                995328000dwMaxVideoFrameBufferSize     4147200dwDefaultFrameInterval         333333bFrameIntervalType                  7dwFrameInterval( 0)            333333dwFrameInterval( 1)            416666dwFrameInterval( 2)            500000dwFrameInterval( 3)            666666dwFrameInterval( 4)           1000000dwFrameInterval( 5)           1333333dwFrameInterval( 6)           2000000VideoStreaming Interface Descriptor:bLength                             6bDescriptorType                    36bDescriptorSubtype                 13 (COLORFORMAT)bColorPrimaries                     1 (BT.709,sRGB)bTransferCharacteristics            1 (BT.709)bMatrixCoefficients                 4 (SMPTE 170M (BT.601))Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       1bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x00c0  1x 192 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       2bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0180  1x 384 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       3bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0200  1x 512 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       4bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0280  1x 640 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       5bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0320  1x 800 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       6bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x03b0  1x 944 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       7bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0a80  2x 640 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       8bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0b20  2x 800 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting       9bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0be0  2x 992 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting      10bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x1380  3x 896 bytesbInterval               1Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        1bAlternateSetting      11bNumEndpoints           1bInterfaceClass        14 VideobInterfaceSubClass      2 Video StreamingbInterfaceProtocol      0 iInterface              0 Endpoint Descriptor:bLength                 7bDescriptorType         5bEndpointAddress     0x81  EP 1 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x1400  3x 1024 bytesbInterval               1Interface Association:bLength                 8bDescriptorType        11bFirstInterface         2bInterfaceCount         2bFunctionClass          1 AudiobFunctionSubClass       2 StreamingbFunctionProtocol       0 iFunction               0 Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        2bAlternateSetting       0bNumEndpoints           0bInterfaceClass         1 AudiobInterfaceSubClass      1 Control DevicebInterfaceProtocol      0 iInterface              0 AudioControl Interface Descriptor:bLength                 9bDescriptorType        36bDescriptorSubtype      1 (HEADER)bcdADC               1.00wTotalLength           38bInCollection           1baInterfaceNr( 0)       3AudioControl Interface Descriptor:bLength                12bDescriptorType        36bDescriptorSubtype      2 (INPUT_TERMINAL)bTerminalID             1wTerminalType      0x0201 MicrophonebAssocTerminal          0bNrChannels             1wChannelConfig     0x0003Left Front (L)Right Front (R)iChannelNames           0 iTerminal               0 AudioControl Interface Descriptor:bLength                 9bDescriptorType        36bDescriptorSubtype      3 (OUTPUT_TERMINAL)bTerminalID             3wTerminalType      0x0101 USB StreamingbAssocTerminal          0bSourceID               5iTerminal               0 AudioControl Interface Descriptor:bLength                 8bDescriptorType        36bDescriptorSubtype      6 (FEATURE_UNIT)bUnitID                 5bSourceID               1bControlSize            1bmaControls( 0)      0x03Mute ControlVolume ControliFeature                0 Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        3bAlternateSetting       0bNumEndpoints           0bInterfaceClass         1 AudiobInterfaceSubClass      2 StreamingbInterfaceProtocol      0 iInterface              0 Interface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        3bAlternateSetting       1bNumEndpoints           1bInterfaceClass         1 AudiobInterfaceSubClass      2 StreamingbInterfaceProtocol      0 iInterface              0 AudioStreaming Interface Descriptor:bLength                 7bDescriptorType        36bDescriptorSubtype      1 (AS_GENERAL)bTerminalLink           3bDelay                  1 frameswFormatTag              1 PCMAudioStreaming Interface Descriptor:bLength                11bDescriptorType        36bDescriptorSubtype      2 (FORMAT_TYPE)bFormatType             1 (FORMAT_TYPE_I)bNrChannels             2bSubframeSize           2bBitResolution         16bSamFreqType            1 DiscretetSamFreq[ 0]        16000Endpoint Descriptor:bLength                 9bDescriptorType         5bEndpointAddress     0x83  EP 3 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0044  1x 68 bytesbInterval               4bRefresh                0bSynchAddress           0AudioControl Endpoint Descriptor:bLength                 7bDescriptorType        37bDescriptorSubtype      1 (EP_GENERAL)bmAttributes         0x01Sampling FrequencybLockDelayUnits         0 UndefinedwLockDelay              0 UndefinedInterface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        3bAlternateSetting       2bNumEndpoints           1bInterfaceClass         1 AudiobInterfaceSubClass      2 StreamingbInterfaceProtocol      0 iInterface              0 AudioStreaming Interface Descriptor:bLength                 7bDescriptorType        36bDescriptorSubtype      1 (AS_GENERAL)bTerminalLink           3bDelay                  1 frameswFormatTag              1 PCMAudioStreaming Interface Descriptor:bLength                11bDescriptorType        36bDescriptorSubtype      2 (FORMAT_TYPE)bFormatType             1 (FORMAT_TYPE_I)bNrChannels             2bSubframeSize           2bBitResolution         16bSamFreqType            1 DiscretetSamFreq[ 0]        24000Endpoint Descriptor:bLength                 9bDescriptorType         5bEndpointAddress     0x83  EP 3 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0064  1x 100 bytesbInterval               4bRefresh                0bSynchAddress           0AudioControl Endpoint Descriptor:bLength                 7bDescriptorType        37bDescriptorSubtype      1 (EP_GENERAL)bmAttributes         0x01Sampling FrequencybLockDelayUnits         0 UndefinedwLockDelay              0 UndefinedInterface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        3bAlternateSetting       3bNumEndpoints           1bInterfaceClass         1 AudiobInterfaceSubClass      2 StreamingbInterfaceProtocol      0 iInterface              0 AudioStreaming Interface Descriptor:bLength                 7bDescriptorType        36bDescriptorSubtype      1 (AS_GENERAL)bTerminalLink           3bDelay                  1 frameswFormatTag              1 PCMAudioStreaming Interface Descriptor:bLength                11bDescriptorType        36bDescriptorSubtype      2 (FORMAT_TYPE)bFormatType             1 (FORMAT_TYPE_I)bNrChannels             2bSubframeSize           2bBitResolution         16bSamFreqType            1 DiscretetSamFreq[ 0]        32000Endpoint Descriptor:bLength                 9bDescriptorType         5bEndpointAddress     0x83  EP 3 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x0084  1x 132 bytesbInterval               4bRefresh                0bSynchAddress           0AudioControl Endpoint Descriptor:bLength                 7bDescriptorType        37bDescriptorSubtype      1 (EP_GENERAL)bmAttributes         0x01Sampling FrequencybLockDelayUnits         0 UndefinedwLockDelay              0 UndefinedInterface Descriptor:bLength                 9bDescriptorType         4bInterfaceNumber        3bAlternateSetting       4bNumEndpoints           1bInterfaceClass         1 AudiobInterfaceSubClass      2 StreamingbInterfaceProtocol      0 iInterface              0 AudioStreaming Interface Descriptor:bLength                 7bDescriptorType        36bDescriptorSubtype      1 (AS_GENERAL)bTerminalLink           3bDelay                  1 frameswFormatTag              1 PCMAudioStreaming Interface Descriptor:bLength                11bDescriptorType        36bDescriptorSubtype      2 (FORMAT_TYPE)bFormatType             1 (FORMAT_TYPE_I)bNrChannels             2bSubframeSize           2bBitResolution         16bSamFreqType            1 DiscretetSamFreq[ 0]        48000Endpoint Descriptor:bLength                 9bDescriptorType         5bEndpointAddress     0x83  EP 3 INbmAttributes            5Transfer Type            IsochronousSynch Type               AsynchronousUsage Type               DatawMaxPacketSize     0x00c4  1x 196 bytesbInterval               4bRefresh                0bSynchAddress           0AudioControl Endpoint Descriptor:bLength                 7bDescriptorType        37bDescriptorSubtype      1 (EP_GENERAL)bmAttributes         0x01Sampling FrequencybLockDelayUnits         0 UndefinedwLockDelay              0 Undefined
Device Qualifier (for other device speed):bLength                10bDescriptorType         6bcdUSB               2.00bDeviceClass          239 Miscellaneous DevicebDeviceSubClass         2 ?bDeviceProtocol         1 Interface AssociationbMaxPacketSize0        64bNumConfigurations      1
Device Status:     0x0000(Bus Powered)

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