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