1What: /config/usb-gadget/gadget/functions/uvc.name 2Date: Dec 2014 3KernelVersion: 4.0 4Description: UVC function directory 5 6 =================== ============================= 7 streaming_maxburst 0..15 (ss only) 8 streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss) 9 streaming_interval 1..16 10 function_name string [32] 11 =================== ============================= 12 13What: /config/usb-gadget/gadget/functions/uvc.name/control 14Date: Dec 2014 15KernelVersion: 4.0 16Description: Control descriptors 17 18 All attributes read only: 19 20 ================ ============================= 21 bInterfaceNumber USB interface number for this 22 streaming interface 23 ================ ============================= 24 25What: /config/usb-gadget/gadget/functions/uvc.name/control/class 26Date: Dec 2014 27KernelVersion: 4.0 28Description: Class descriptors 29 30What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss 31Date: Dec 2014 32KernelVersion: 4.0 33Description: Super speed control class descriptors 34 35What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs 36Date: Dec 2014 37KernelVersion: 4.0 38Description: Full speed control class descriptors 39 40What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal 41Date: Dec 2014 42KernelVersion: 4.0 43Description: Terminal descriptors 44 45What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output 46Date: Dec 2014 47KernelVersion: 4.0 48Description: Output terminal descriptors 49 50What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default 51Date: Dec 2014 52KernelVersion: 4.0 53Description: Default output terminal descriptors 54 55 All attributes read only: 56 57 ============== ============================================= 58 iTerminal index of string descriptor 59 bSourceID id of the terminal to which this terminal 60 is connected 61 bAssocTerminal id of the input terminal to which this output 62 terminal is associated 63 wTerminalType terminal type 64 bTerminalID a non-zero id of this terminal 65 ============== ============================================= 66 67What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera 68Date: Dec 2014 69KernelVersion: 4.0 70Description: Camera terminal descriptors 71 72What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default 73Date: Dec 2014 74KernelVersion: 4.0 75Description: Default camera terminal descriptors 76 77 All attributes read only: 78 79 ======================== ==================================== 80 bmControls bitmap specifying which controls are 81 supported for the video stream 82 wOcularFocalLength the value of Locular 83 wObjectiveFocalLengthMax the value of Lmin 84 wObjectiveFocalLengthMin the value of Lmax 85 iTerminal index of string descriptor 86 bAssocTerminal id of the output terminal to which 87 this terminal is connected 88 wTerminalType terminal type 89 bTerminalID a non-zero id of this terminal 90 ======================== ==================================== 91 92What: /config/usb-gadget/gadget/functions/uvc.name/control/processing 93Date: Dec 2014 94KernelVersion: 4.0 95Description: Processing unit descriptors 96 97What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default 98Date: Dec 2014 99KernelVersion: 4.0 100Description: Default processing unit descriptors 101 102 All attributes read only: 103 104 =============== ======================================== 105 iProcessing index of string descriptor 106 bmControls bitmap specifying which controls are 107 supported for the video stream 108 wMaxMultiplier maximum digital magnification x100 109 bSourceID id of the terminal to which this unit is 110 connected 111 bUnitID a non-zero id of this unit 112 =============== ======================================== 113 114What: /config/usb-gadget/gadget/functions/uvc.name/control/header 115Date: Dec 2014 116KernelVersion: 4.0 117Description: Control header descriptors 118 119What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name 120Date: Dec 2014 121KernelVersion: 4.0 122Description: Specific control header descriptors 123 124dwClockFrequency 125bcdUVC 126What: /config/usb-gadget/gadget/functions/uvc.name/streaming 127Date: Dec 2014 128KernelVersion: 4.0 129Description: Streaming descriptors 130 131 All attributes read only: 132 133 ================ ============================= 134 bInterfaceNumber USB interface number for this 135 streaming interface 136 ================ ============================= 137 138What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class 139Date: Dec 2014 140KernelVersion: 4.0 141Description: Streaming class descriptors 142 143What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss 144Date: Dec 2014 145KernelVersion: 4.0 146Description: Super speed streaming class descriptors 147 148What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs 149Date: Dec 2014 150KernelVersion: 4.0 151Description: High speed streaming class descriptors 152 153What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs 154Date: Dec 2014 155KernelVersion: 4.0 156Description: Full speed streaming class descriptors 157 158What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching 159Date: Dec 2014 160KernelVersion: 4.0 161Description: Color matching descriptors 162 163What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default 164Date: Dec 2014 165KernelVersion: 4.0 166Description: Default color matching descriptors 167 168 All attributes read only: 169 170 ======================== ====================================== 171 bMatrixCoefficients matrix used to compute luma and 172 chroma values from the color primaries 173 bTransferCharacteristics optoelectronic transfer 174 characteristic of the source picture, 175 also called the gamma function 176 bColorPrimaries color primaries and the reference 177 white 178 ======================== ====================================== 179 180What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg 181Date: Dec 2014 182KernelVersion: 4.0 183Description: MJPEG format descriptors 184 185What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name 186Date: Dec 2014 187KernelVersion: 4.0 188Description: Specific MJPEG format descriptors 189 190 All attributes read only, 191 except bmaControls and bDefaultFrameIndex: 192 193 =================== ===================================== 194 bFormatIndex unique id for this format descriptor; 195 only defined after parent header is 196 linked into the streaming class; 197 read-only 198 bmaControls this format's data for bmaControls in 199 the streaming header 200 bmInterlaceFlags specifies interlace information, 201 read-only 202 bAspectRatioY the X dimension of the picture aspect 203 ratio, read-only 204 bAspectRatioX the Y dimension of the picture aspect 205 ratio, read-only 206 bmFlags characteristics of this format, 207 read-only 208 bDefaultFrameIndex optimum frame index for this stream 209 =================== ===================================== 210 211What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name 212Date: Dec 2014 213KernelVersion: 4.0 214Description: Specific MJPEG frame descriptors 215 216 ========================= ===================================== 217 bFrameIndex unique id for this framedescriptor; 218 only defined after parent format is 219 linked into the streaming header; 220 read-only 221 dwFrameInterval indicates how frame interval can be 222 programmed; a number of values 223 separated by newline can be specified 224 dwDefaultFrameInterval the frame interval the device would 225 like to use as default 226 dwMaxVideoFrameBufferSize the maximum number of bytes the 227 compressor will produce for a video 228 frame or still image 229 dwMaxBitRate the maximum bit rate at the shortest 230 frame interval in bps 231 dwMinBitRate the minimum bit rate at the longest 232 frame interval in bps 233 wHeight height of decoded bitmap frame in px 234 wWidth width of decoded bitmam frame in px 235 bmCapabilities still image support, fixed frame-rate 236 support 237 ========================= ===================================== 238 239What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed 240Date: Dec 2014 241KernelVersion: 4.0 242Description: Uncompressed format descriptors 243 244What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name 245Date: Dec 2014 246KernelVersion: 4.0 247Description: Specific uncompressed format descriptors 248 249 ================== ======================================= 250 bFormatIndex unique id for this format descriptor; 251 only defined after parent header is 252 linked into the streaming class; 253 read-only 254 bmaControls this format's data for bmaControls in 255 the streaming header 256 bmInterlaceFlags specifies interlace information, 257 read-only 258 bAspectRatioY the X dimension of the picture aspect 259 ratio, read-only 260 bAspectRatioX the Y dimension of the picture aspect 261 ratio, read-only 262 bDefaultFrameIndex optimum frame index for this stream 263 bBitsPerPixel number of bits per pixel used to 264 specify color in the decoded video 265 frame 266 guidFormat globally unique id used to identify 267 stream-encoding format 268 ================== ======================================= 269 270What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name 271Date: Dec 2014 272KernelVersion: 4.0 273Description: Specific uncompressed frame descriptors 274 275 ========================= ===================================== 276 bFrameIndex unique id for this framedescriptor; 277 only defined after parent format is 278 linked into the streaming header; 279 read-only 280 dwFrameInterval indicates how frame interval can be 281 programmed; a number of values 282 separated by newline can be specified 283 dwDefaultFrameInterval the frame interval the device would 284 like to use as default 285 dwMaxVideoFrameBufferSize the maximum number of bytes the 286 compressor will produce for a video 287 frame or still image 288 dwMaxBitRate the maximum bit rate at the shortest 289 frame interval in bps 290 dwMinBitRate the minimum bit rate at the longest 291 frame interval in bps 292 wHeight height of decoded bitmap frame in px 293 wWidth width of decoded bitmam frame in px 294 bmCapabilities still image support, fixed frame-rate 295 support 296 ========================= ===================================== 297 298What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header 299Date: Dec 2014 300KernelVersion: 4.0 301Description: Streaming header descriptors 302 303What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name 304Date: Dec 2014 305KernelVersion: 4.0 306Description: Specific streaming header descriptors 307 308 All attributes read only: 309 310 ==================== ===================================== 311 bTriggerUsage how the host software will respond to 312 a hardware trigger interrupt event 313 bTriggerSupport flag specifying if hardware 314 triggering is supported 315 bStillCaptureMethod method of still image capture 316 supported 317 bTerminalLink id of the output terminal to which 318 the video endpoint of this interface 319 is connected 320 bmInfo capabilities of this video streaming 321 interface 322 ==================== ===================================== 323 324What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name 325Date: May 2018 326KernelVersion: 4.19 327Description: UVC configfs function instance name 328