| What: /config/usb-gadget/gadget/functions/uvc.name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: UVC function directory |
| |
| =================== ============================= |
| streaming_maxburst 0..15 (ss only) |
| streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss) |
| streaming_interval 1..16 |
| function_name string [32] |
| =================== ============================= |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Control descriptors |
| |
| All attributes read only except enable_interrupt_ep: |
| |
| =================== ============================= |
| bInterfaceNumber USB interface number for this |
| streaming interface |
| enable_interrupt_ep flag to enable the interrupt |
| endpoint for the VC interface |
| =================== ============================= |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/class |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Super speed control class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Full speed control class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Terminal descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Output terminal descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Default output terminal descriptors |
| |
| All attributes read only except bSourceID: |
| |
| ============== ============================================= |
| iTerminal index of string descriptor |
| bSourceID id of the terminal to which this terminal |
| is connected |
| bAssocTerminal id of the input terminal to which this output |
| terminal is associated |
| wTerminalType terminal type |
| bTerminalID a non-zero id of this terminal |
| ============== ============================================= |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Camera terminal descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Default camera terminal descriptors |
| |
| All attributes read only except bmControls, which is read/write: |
| |
| ======================== ==================================== |
| bmControls bitmap specifying which controls are |
| supported for the video stream |
| wOcularFocalLength the value of Locular |
| wObjectiveFocalLengthMax the value of Lmin |
| wObjectiveFocalLengthMin the value of Lmax |
| iTerminal index of string descriptor |
| bAssocTerminal id of the output terminal to which |
| this terminal is connected |
| wTerminalType terminal type |
| bTerminalID a non-zero id of this terminal |
| ======================== ==================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/processing |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Processing unit descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Default processing unit descriptors |
| |
| All attributes read only except bmControls, which is read/write: |
| |
| =============== ======================================== |
| iProcessing index of string descriptor |
| bmControls bitmap specifying which controls are |
| supported for the video stream |
| wMaxMultiplier maximum digital magnification x100 |
| bSourceID id of the terminal to which this unit is |
| connected |
| bUnitID a non-zero id of this unit |
| =============== ======================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/extensions |
| Date: Nov 2022 |
| KernelVersion: 6.1 |
| Description: Extension unit descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/extensions/name |
| Date: Nov 2022 |
| KernelVersion: 6.1 |
| Description: Extension Unit (XU) Descriptor |
| |
| bLength, bUnitID and iExtension are read-only. All others are |
| read-write. |
| |
| ================= ======================================== |
| bLength size of the descriptor in bytes |
| bUnitID non-zero ID of this unit |
| guidExtensionCode Vendor-specific code identifying the XU |
| bNumControls number of controls in this XU |
| bNrInPins number of input pins for this unit |
| baSourceID list of the IDs of the units or terminals |
| to which this XU is connected |
| bControlSize size of the bmControls field in bytes |
| bmControls list of bitmaps detailing which vendor |
| specific controls are supported |
| iExtension index of a string descriptor that describes |
| this extension unit |
| ================= ======================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/header |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Control header descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Specific control header descriptors |
| |
| dwClockFrequency |
| bcdUVC |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Streaming descriptors |
| |
| All attributes read only: |
| |
| ================ ============================= |
| bInterfaceNumber USB interface number for this |
| streaming interface |
| ================ ============================= |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Streaming class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Super speed streaming class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: High speed streaming class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Full speed streaming class descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Color matching descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Default color matching descriptors |
| |
| All attributes read/write: |
| |
| ======================== ====================================== |
| bMatrixCoefficients matrix used to compute luma and |
| chroma values from the color primaries |
| bTransferCharacteristics optoelectronic transfer |
| characteristic of the source picture, |
| also called the gamma function |
| bColorPrimaries color primaries and the reference |
| white |
| ======================== ====================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/name |
| Date: Dec 2022 |
| KernelVersion: 6.3 |
| Description: Additional color matching descriptors |
| |
| All attributes read/write: |
| |
| ======================== ====================================== |
| bMatrixCoefficients matrix used to compute luma and |
| chroma values from the color primaries |
| bTransferCharacteristics optoelectronic transfer |
| characteristic of the source picture, |
| also called the gamma function |
| bColorPrimaries color primaries and the reference |
| white |
| ======================== ====================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: MJPEG format descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Specific MJPEG format descriptors |
| |
| All attributes read only, |
| except bmaControls and bDefaultFrameIndex: |
| |
| =================== ===================================== |
| bFormatIndex unique id for this format descriptor; |
| only defined after parent header is |
| linked into the streaming class; |
| read-only |
| bmaControls this format's data for bmaControls in |
| the streaming header |
| bmInterlaceFlags specifies interlace information, |
| read-only |
| bAspectRatioY the X dimension of the picture aspect |
| ratio, read-only |
| bAspectRatioX the Y dimension of the picture aspect |
| ratio, read-only |
| bmFlags characteristics of this format, |
| read-only |
| bDefaultFrameIndex optimum frame index for this stream |
| =================== ===================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Specific MJPEG frame descriptors |
| |
| ========================= ===================================== |
| bFrameIndex unique id for this framedescriptor; |
| only defined after parent format is |
| linked into the streaming header; |
| read-only |
| dwFrameInterval indicates how frame interval can be |
| programmed; a number of values |
| separated by newline can be specified |
| dwDefaultFrameInterval the frame interval the device would |
| like to use as default |
| dwMaxVideoFrameBufferSize the maximum number of bytes the |
| compressor will produce for a video |
| frame or still image |
| dwMaxBitRate the maximum bit rate at the shortest |
| frame interval in bps |
| dwMinBitRate the minimum bit rate at the longest |
| frame interval in bps |
| wHeight height of decoded bitmap frame in px |
| wWidth width of decoded bitmam frame in px |
| bmCapabilities still image support, fixed frame-rate |
| support |
| ========================= ===================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Uncompressed format descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Specific uncompressed format descriptors |
| |
| ================== ======================================= |
| bFormatIndex unique id for this format descriptor; |
| only defined after parent header is |
| linked into the streaming class; |
| read-only |
| bmaControls this format's data for bmaControls in |
| the streaming header |
| bmInterlaceFlags specifies interlace information, |
| read-only |
| bAspectRatioY the X dimension of the picture aspect |
| ratio, read-only |
| bAspectRatioX the Y dimension of the picture aspect |
| ratio, read-only |
| bDefaultFrameIndex optimum frame index for this stream |
| bBitsPerPixel number of bits per pixel used to |
| specify color in the decoded video |
| frame |
| guidFormat globally unique id used to identify |
| stream-encoding format |
| ================== ======================================= |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Specific uncompressed frame descriptors |
| |
| ========================= ===================================== |
| bFrameIndex unique id for this framedescriptor; |
| only defined after parent format is |
| linked into the streaming header; |
| read-only |
| dwFrameInterval indicates how frame interval can be |
| programmed; a number of values |
| separated by newline can be specified |
| dwDefaultFrameInterval the frame interval the device would |
| like to use as default |
| dwMaxVideoFrameBufferSize the maximum number of bytes the |
| compressor will produce for a video |
| frame or still image |
| dwMaxBitRate the maximum bit rate at the shortest |
| frame interval in bps |
| dwMinBitRate the minimum bit rate at the longest |
| frame interval in bps |
| wHeight height of decoded bitmap frame in px |
| wWidth width of decoded bitmam frame in px |
| bmCapabilities still image support, fixed frame-rate |
| support |
| ========================= ===================================== |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Streaming header descriptors |
| |
| What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name |
| Date: Dec 2014 |
| KernelVersion: 4.0 |
| Description: Specific streaming header descriptors |
| |
| All attributes read only: |
| |
| ==================== ===================================== |
| bTriggerUsage how the host software will respond to |
| a hardware trigger interrupt event |
| bTriggerSupport flag specifying if hardware |
| triggering is supported |
| bStillCaptureMethod method of still image capture |
| supported |
| bTerminalLink id of the output terminal to which |
| the video endpoint of this interface |
| is connected |
| bmInfo capabilities of this video streaming |
| interface |
| ==================== ===================================== |
| |
| What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name |
| Date: May 2018 |
| KernelVersion: 4.19 |
| Description: UVC configfs function instance name |
