1 What: /config/usb-gadget/gadget/functions/uvc.name 2 Date: Dec 2014 3 KernelVersion: 4.0 4 Description: 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 13 What: /config/usb-gadget/gadget/functions/uvc.name/control 14 Date: Dec 2014 15 KernelVersion: 4.0 16 Description: Control descriptors 17 18 All attributes read only except enable_interrupt_ep: 19 20 =================== ============================= 21 bInterfaceNumber USB interface number for this 22 streaming interface 23 enable_interrupt_ep flag to enable the interrupt 24 endpoint for the VC interface 25 =================== ============================= 26 27 What: /config/usb-gadget/gadget/functions/uvc.name/control/class 28 Date: Dec 2014 29 KernelVersion: 4.0 30 Description: Class descriptors 31 32 What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss 33 Date: Dec 2014 34 KernelVersion: 4.0 35 Description: Super speed control class descriptors 36 37 What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs 38 Date: Dec 2014 39 KernelVersion: 4.0 40 Description: Full speed control class descriptors 41 42 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal 43 Date: Dec 2014 44 KernelVersion: 4.0 45 Description: Terminal descriptors 46 47 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output 48 Date: Dec 2014 49 KernelVersion: 4.0 50 Description: Output terminal descriptors 51 52 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default 53 Date: Dec 2014 54 KernelVersion: 4.0 55 Description: Default output terminal descriptors 56 57 All attributes read only except bSourceID: 58 59 ============== ============================================= 60 iTerminal index of string descriptor 61 bSourceID id of the terminal to which this terminal 62 is connected 63 bAssocTerminal id of the input terminal to which this output 64 terminal is associated 65 wTerminalType terminal type 66 bTerminalID a non-zero id of this terminal 67 ============== ============================================= 68 69 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera 70 Date: Dec 2014 71 KernelVersion: 4.0 72 Description: Camera terminal descriptors 73 74 What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default 75 Date: Dec 2014 76 KernelVersion: 4.0 77 Description: Default camera terminal descriptors 78 79 All attributes read only except bmControls, which is read/write: 80 81 ======================== ==================================== 82 bmControls bitmap specifying which controls are 83 supported for the video stream 84 wOcularFocalLength the value of Locular 85 wObjectiveFocalLengthMax the value of Lmin 86 wObjectiveFocalLengthMin the value of Lmax 87 iTerminal index of string descriptor 88 bAssocTerminal id of the output terminal to which 89 this terminal is connected 90 wTerminalType terminal type 91 bTerminalID a non-zero id of this terminal 92 ======================== ==================================== 93 94 What: /config/usb-gadget/gadget/functions/uvc.name/control/processing 95 Date: Dec 2014 96 KernelVersion: 4.0 97 Description: Processing unit descriptors 98 99 What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default 100 Date: Dec 2014 101 KernelVersion: 4.0 102 Description: Default processing unit descriptors 103 104 All attributes read only except bmControls, which is read/write: 105 106 =============== ======================================== 107 iProcessing index of string descriptor 108 bmControls bitmap specifying which controls are 109 supported for the video stream 110 wMaxMultiplier maximum digital magnification x100 111 bSourceID id of the terminal to which this unit is 112 connected 113 bUnitID a non-zero id of this unit 114 =============== ======================================== 115 116 What: /config/usb-gadget/gadget/functions/uvc.name/control/extensions 117 Date: Nov 2022 118 KernelVersion: 6.1 119 Description: Extension unit descriptors 120 121 What: /config/usb-gadget/gadget/functions/uvc.name/control/extensions/name 122 Date: Nov 2022 123 KernelVersion: 6.1 124 Description: Extension Unit (XU) Descriptor 125 126 bLength, bUnitID and iExtension are read-only. All others are 127 read-write. 128 129 ================= ======================================== 130 bLength size of the descriptor in bytes 131 bUnitID non-zero ID of this unit 132 guidExtensionCode Vendor-specific code identifying the XU 133 bNumControls number of controls in this XU 134 bNrInPins number of input pins for this unit 135 baSourceID list of the IDs of the units or terminals 136 to which this XU is connected 137 bControlSize size of the bmControls field in bytes 138 bmControls list of bitmaps detailing which vendor 139 specific controls are supported 140 iExtension index of a string descriptor that describes 141 this extension unit 142 ================= ======================================== 143 144 What: /config/usb-gadget/gadget/functions/uvc.name/control/header 145 Date: Dec 2014 146 KernelVersion: 4.0 147 Description: Control header descriptors 148 149 What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name 150 Date: Dec 2014 151 KernelVersion: 4.0 152 Description: Specific control header descriptors 153 154 dwClockFrequency 155 bcdUVC 156 What: /config/usb-gadget/gadget/functions/uvc.name/streaming 157 Date: Dec 2014 158 KernelVersion: 4.0 159 Description: Streaming descriptors 160 161 All attributes read only: 162 163 ================ ============================= 164 bInterfaceNumber USB interface number for this 165 streaming interface 166 ================ ============================= 167 168 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class 169 Date: Dec 2014 170 KernelVersion: 4.0 171 Description: Streaming class descriptors 172 173 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss 174 Date: Dec 2014 175 KernelVersion: 4.0 176 Description: Super speed streaming class descriptors 177 178 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs 179 Date: Dec 2014 180 KernelVersion: 4.0 181 Description: High speed streaming class descriptors 182 183 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs 184 Date: Dec 2014 185 KernelVersion: 4.0 186 Description: Full speed streaming class descriptors 187 188 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching 189 Date: Dec 2014 190 KernelVersion: 4.0 191 Description: Color matching descriptors 192 193 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default 194 Date: Dec 2014 195 KernelVersion: 4.0 196 Description: Default color matching descriptors 197 198 All attributes read/write: 199 200 ======================== ====================================== 201 bMatrixCoefficients matrix used to compute luma and 202 chroma values from the color primaries 203 bTransferCharacteristics optoelectronic transfer 204 characteristic of the source picture, 205 also called the gamma function 206 bColorPrimaries color primaries and the reference 207 white 208 ======================== ====================================== 209 210 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/name 211 Date: Dec 2022 212 KernelVersion: 6.3 213 Description: Additional color matching descriptors 214 215 All attributes read/write: 216 217 ======================== ====================================== 218 bMatrixCoefficients matrix used to compute luma and 219 chroma values from the color primaries 220 bTransferCharacteristics optoelectronic transfer 221 characteristic of the source picture, 222 also called the gamma function 223 bColorPrimaries color primaries and the reference 224 white 225 ======================== ====================================== 226 227 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg 228 Date: Dec 2014 229 KernelVersion: 4.0 230 Description: MJPEG format descriptors 231 232 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name 233 Date: Dec 2014 234 KernelVersion: 4.0 235 Description: Specific MJPEG format descriptors 236 237 All attributes read only, 238 except bmaControls and bDefaultFrameIndex: 239 240 =================== ===================================== 241 bFormatIndex unique id for this format descriptor; 242 only defined after parent header is 243 linked into the streaming class; 244 read-only 245 bmaControls this format's data for bmaControls in 246 the streaming header 247 bmInterlaceFlags specifies interlace information, 248 read-only 249 bAspectRatioY the X dimension of the picture aspect 250 ratio, read-only 251 bAspectRatioX the Y dimension of the picture aspect 252 ratio, read-only 253 bmFlags characteristics of this format, 254 read-only 255 bDefaultFrameIndex optimum frame index for this stream 256 =================== ===================================== 257 258 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name 259 Date: Dec 2014 260 KernelVersion: 4.0 261 Description: Specific MJPEG frame descriptors 262 263 ========================= ===================================== 264 bFrameIndex unique id for this framedescriptor; 265 only defined after parent format is 266 linked into the streaming header; 267 read-only 268 dwFrameInterval indicates how frame interval can be 269 programmed; a number of values 270 separated by newline can be specified 271 dwDefaultFrameInterval the frame interval the device would 272 like to use as default 273 dwMaxVideoFrameBufferSize the maximum number of bytes the 274 compressor will produce for a video 275 frame or still image 276 dwMaxBitRate the maximum bit rate at the shortest 277 frame interval in bps 278 dwMinBitRate the minimum bit rate at the longest 279 frame interval in bps 280 wHeight height of decoded bitmap frame in px 281 wWidth width of decoded bitmam frame in px 282 bmCapabilities still image support, fixed frame-rate 283 support 284 ========================= ===================================== 285 286 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed 287 Date: Dec 2014 288 KernelVersion: 4.0 289 Description: Uncompressed format descriptors 290 291 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name 292 Date: Dec 2014 293 KernelVersion: 4.0 294 Description: Specific uncompressed format descriptors 295 296 ================== ======================================= 297 bFormatIndex unique id for this format descriptor; 298 only defined after parent header is 299 linked into the streaming class; 300 read-only 301 bmaControls this format's data for bmaControls in 302 the streaming header 303 bmInterlaceFlags specifies interlace information, 304 read-only 305 bAspectRatioY the X dimension of the picture aspect 306 ratio, read-only 307 bAspectRatioX the Y dimension of the picture aspect 308 ratio, read-only 309 bDefaultFrameIndex optimum frame index for this stream 310 bBitsPerPixel number of bits per pixel used to 311 specify color in the decoded video 312 frame 313 guidFormat globally unique id used to identify 314 stream-encoding format 315 ================== ======================================= 316 317 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name 318 Date: Dec 2014 319 KernelVersion: 4.0 320 Description: Specific uncompressed frame descriptors 321 322 ========================= ===================================== 323 bFrameIndex unique id for this framedescriptor; 324 only defined after parent format is 325 linked into the streaming header; 326 read-only 327 dwFrameInterval indicates how frame interval can be 328 programmed; a number of values 329 separated by newline can be specified 330 dwDefaultFrameInterval the frame interval the device would 331 like to use as default 332 dwMaxVideoFrameBufferSize the maximum number of bytes the 333 compressor will produce for a video 334 frame or still image 335 dwMaxBitRate the maximum bit rate at the shortest 336 frame interval in bps 337 dwMinBitRate the minimum bit rate at the longest 338 frame interval in bps 339 wHeight height of decoded bitmap frame in px 340 wWidth width of decoded bitmam frame in px 341 bmCapabilities still image support, fixed frame-rate 342 support 343 ========================= ===================================== 344 345 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header 346 Date: Dec 2014 347 KernelVersion: 4.0 348 Description: Streaming header descriptors 349 350 What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name 351 Date: Dec 2014 352 KernelVersion: 4.0 353 Description: Specific streaming header descriptors 354 355 All attributes read only: 356 357 ==================== ===================================== 358 bTriggerUsage how the host software will respond to 359 a hardware trigger interrupt event 360 bTriggerSupport flag specifying if hardware 361 triggering is supported 362 bStillCaptureMethod method of still image capture 363 supported 364 bTerminalLink id of the output terminal to which 365 the video endpoint of this interface 366 is connected 367 bmInfo capabilities of this video streaming 368 interface 369 ==================== ===================================== 370 371 What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name 372 Date: May 2018 373 KernelVersion: 4.19 374 Description: UVC configfs function instance name
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