0001 What: /config/usb-gadget/gadget/functions/uvc.name
0002 Date: Dec 2014
0003 KernelVersion: 4.0
0004 Description: UVC function directory
0005
0006 =================== =============================
0007 streaming_maxburst 0..15 (ss only)
0008 streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss)
0009 streaming_interval 1..16
0010 function_name string [32]
0011 =================== =============================
0012
0013 What: /config/usb-gadget/gadget/functions/uvc.name/control
0014 Date: Dec 2014
0015 KernelVersion: 4.0
0016 Description: Control descriptors
0017
0018 All attributes read only:
0019
0020 ================ =============================
0021 bInterfaceNumber USB interface number for this
0022 streaming interface
0023 ================ =============================
0024
0025 What: /config/usb-gadget/gadget/functions/uvc.name/control/class
0026 Date: Dec 2014
0027 KernelVersion: 4.0
0028 Description: Class descriptors
0029
0030 What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss
0031 Date: Dec 2014
0032 KernelVersion: 4.0
0033 Description: Super speed control class descriptors
0034
0035 What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs
0036 Date: Dec 2014
0037 KernelVersion: 4.0
0038 Description: Full speed control class descriptors
0039
0040 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal
0041 Date: Dec 2014
0042 KernelVersion: 4.0
0043 Description: Terminal descriptors
0044
0045 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output
0046 Date: Dec 2014
0047 KernelVersion: 4.0
0048 Description: Output terminal descriptors
0049
0050 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default
0051 Date: Dec 2014
0052 KernelVersion: 4.0
0053 Description: Default output terminal descriptors
0054
0055 All attributes read only:
0056
0057 ============== =============================================
0058 iTerminal index of string descriptor
0059 bSourceID id of the terminal to which this terminal
0060 is connected
0061 bAssocTerminal id of the input terminal to which this output
0062 terminal is associated
0063 wTerminalType terminal type
0064 bTerminalID a non-zero id of this terminal
0065 ============== =============================================
0066
0067 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera
0068 Date: Dec 2014
0069 KernelVersion: 4.0
0070 Description: Camera terminal descriptors
0071
0072 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default
0073 Date: Dec 2014
0074 KernelVersion: 4.0
0075 Description: Default camera terminal descriptors
0076
0077 All attributes read only:
0078
0079 ======================== ====================================
0080 bmControls bitmap specifying which controls are
0081 supported for the video stream
0082 wOcularFocalLength the value of Locular
0083 wObjectiveFocalLengthMax the value of Lmin
0084 wObjectiveFocalLengthMin the value of Lmax
0085 iTerminal index of string descriptor
0086 bAssocTerminal id of the output terminal to which
0087 this terminal is connected
0088 wTerminalType terminal type
0089 bTerminalID a non-zero id of this terminal
0090 ======================== ====================================
0091
0092 What: /config/usb-gadget/gadget/functions/uvc.name/control/processing
0093 Date: Dec 2014
0094 KernelVersion: 4.0
0095 Description: Processing unit descriptors
0096
0097 What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default
0098 Date: Dec 2014
0099 KernelVersion: 4.0
0100 Description: Default processing unit descriptors
0101
0102 All attributes read only:
0103
0104 =============== ========================================
0105 iProcessing index of string descriptor
0106 bmControls bitmap specifying which controls are
0107 supported for the video stream
0108 wMaxMultiplier maximum digital magnification x100
0109 bSourceID id of the terminal to which this unit is
0110 connected
0111 bUnitID a non-zero id of this unit
0112 =============== ========================================
0113
0114 What: /config/usb-gadget/gadget/functions/uvc.name/control/header
0115 Date: Dec 2014
0116 KernelVersion: 4.0
0117 Description: Control header descriptors
0118
0119 What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name
0120 Date: Dec 2014
0121 KernelVersion: 4.0
0122 Description: Specific control header descriptors
0123
0124 dwClockFrequency
0125 bcdUVC
0126 What: /config/usb-gadget/gadget/functions/uvc.name/streaming
0127 Date: Dec 2014
0128 KernelVersion: 4.0
0129 Description: Streaming descriptors
0130
0131 All attributes read only:
0132
0133 ================ =============================
0134 bInterfaceNumber USB interface number for this
0135 streaming interface
0136 ================ =============================
0137
0138 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class
0139 Date: Dec 2014
0140 KernelVersion: 4.0
0141 Description: Streaming class descriptors
0142
0143 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss
0144 Date: Dec 2014
0145 KernelVersion: 4.0
0146 Description: Super speed streaming class descriptors
0147
0148 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs
0149 Date: Dec 2014
0150 KernelVersion: 4.0
0151 Description: High speed streaming class descriptors
0152
0153 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs
0154 Date: Dec 2014
0155 KernelVersion: 4.0
0156 Description: Full speed streaming class descriptors
0157
0158 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching
0159 Date: Dec 2014
0160 KernelVersion: 4.0
0161 Description: Color matching descriptors
0162
0163 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default
0164 Date: Dec 2014
0165 KernelVersion: 4.0
0166 Description: Default color matching descriptors
0167
0168 All attributes read only:
0169
0170 ======================== ======================================
0171 bMatrixCoefficients matrix used to compute luma and
0172 chroma values from the color primaries
0173 bTransferCharacteristics optoelectronic transfer
0174 characteristic of the source picture,
0175 also called the gamma function
0176 bColorPrimaries color primaries and the reference
0177 white
0178 ======================== ======================================
0179
0180 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg
0181 Date: Dec 2014
0182 KernelVersion: 4.0
0183 Description: MJPEG format descriptors
0184
0185 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name
0186 Date: Dec 2014
0187 KernelVersion: 4.0
0188 Description: Specific MJPEG format descriptors
0189
0190 All attributes read only,
0191 except bmaControls and bDefaultFrameIndex:
0192
0193 =================== =====================================
0194 bFormatIndex unique id for this format descriptor;
0195 only defined after parent header is
0196 linked into the streaming class;
0197 read-only
0198 bmaControls this format's data for bmaControls in
0199 the streaming header
0200 bmInterfaceFlags specifies interlace information,
0201 read-only
0202 bAspectRatioY the X dimension of the picture aspect
0203 ratio, read-only
0204 bAspectRatioX the Y dimension of the picture aspect
0205 ratio, read-only
0206 bmFlags characteristics of this format,
0207 read-only
0208 bDefaultFrameIndex optimum frame index for this stream
0209 =================== =====================================
0210
0211 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name
0212 Date: Dec 2014
0213 KernelVersion: 4.0
0214 Description: Specific MJPEG frame descriptors
0215
0216 ========================= =====================================
0217 bFrameIndex unique id for this framedescriptor;
0218 only defined after parent format is
0219 linked into the streaming header;
0220 read-only
0221 dwFrameInterval indicates how frame interval can be
0222 programmed; a number of values
0223 separated by newline can be specified
0224 dwDefaultFrameInterval the frame interval the device would
0225 like to use as default
0226 dwMaxVideoFrameBufferSize the maximum number of bytes the
0227 compressor will produce for a video
0228 frame or still image
0229 dwMaxBitRate the maximum bit rate at the shortest
0230 frame interval in bps
0231 dwMinBitRate the minimum bit rate at the longest
0232 frame interval in bps
0233 wHeight height of decoded bitmap frame in px
0234 wWidth width of decoded bitmam frame in px
0235 bmCapabilities still image support, fixed frame-rate
0236 support
0237 ========================= =====================================
0238
0239 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed
0240 Date: Dec 2014
0241 KernelVersion: 4.0
0242 Description: Uncompressed format descriptors
0243
0244 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name
0245 Date: Dec 2014
0246 KernelVersion: 4.0
0247 Description: Specific uncompressed format descriptors
0248
0249 ================== =======================================
0250 bFormatIndex unique id for this format descriptor;
0251 only defined after parent header is
0252 linked into the streaming class;
0253 read-only
0254 bmaControls this format's data for bmaControls in
0255 the streaming header
0256 bmInterfaceFlags specifies interlace information,
0257 read-only
0258 bAspectRatioY the X dimension of the picture aspect
0259 ratio, read-only
0260 bAspectRatioX the Y dimension of the picture aspect
0261 ratio, read-only
0262 bDefaultFrameIndex optimum frame index for this stream
0263 bBitsPerPixel number of bits per pixel used to
0264 specify color in the decoded video
0265 frame
0266 guidFormat globally unique id used to identify
0267 stream-encoding format
0268 ================== =======================================
0269
0270 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name
0271 Date: Dec 2014
0272 KernelVersion: 4.0
0273 Description: Specific uncompressed frame descriptors
0274
0275 ========================= =====================================
0276 bFrameIndex unique id for this framedescriptor;
0277 only defined after parent format is
0278 linked into the streaming header;
0279 read-only
0280 dwFrameInterval indicates how frame interval can be
0281 programmed; a number of values
0282 separated by newline can be specified
0283 dwDefaultFrameInterval the frame interval the device would
0284 like to use as default
0285 dwMaxVideoFrameBufferSize the maximum number of bytes the
0286 compressor will produce for a video
0287 frame or still image
0288 dwMaxBitRate the maximum bit rate at the shortest
0289 frame interval in bps
0290 dwMinBitRate the minimum bit rate at the longest
0291 frame interval in bps
0292 wHeight height of decoded bitmap frame in px
0293 wWidth width of decoded bitmam frame in px
0294 bmCapabilities still image support, fixed frame-rate
0295 support
0296 ========================= =====================================
0297
0298 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header
0299 Date: Dec 2014
0300 KernelVersion: 4.0
0301 Description: Streaming header descriptors
0302
0303 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name
0304 Date: Dec 2014
0305 KernelVersion: 4.0
0306 Description: Specific streaming header descriptors
0307
0308 All attributes read only:
0309
0310 ==================== =====================================
0311 bTriggerUsage how the host software will respond to
0312 a hardware trigger interrupt event
0313 bTriggerSupport flag specifying if hardware
0314 triggering is supported
0315 bStillCaptureMethod method of still image capture
0316 supported
0317 bTerminalLink id of the output terminal to which
0318 the video endpoint of this interface
0319 is connected
0320 bmInfo capabilities of this video streaming
0321 interface
0322 ==================== =====================================
0323
0324 What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name
0325 Date: May 2018
0326 KernelVersion: 4.19
0327 Description: UVC configfs function instance name
