1What: /config/usb-gadget/gadget/functions/uvc.name 2Date: Dec 2014 3KernelVersion: 3.20 4Description: UVC function directory 5 6 streaming_maxburst - 0..15 (ss only) 7 streaming_maxpacket - 1..1023 (fs), 1..3072 (hs/ss) 8 streaming_interval - 1..16 9 10What: /config/usb-gadget/gadget/functions/uvc.name/control 11Date: Dec 2014 12KernelVersion: 3.20 13Description: Control descriptors 14 15What: /config/usb-gadget/gadget/functions/uvc.name/control/class 16Date: Dec 2014 17KernelVersion: 3.20 18Description: Class descriptors 19 20What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss 21Date: Dec 2014 22KernelVersion: 3.20 23Description: Super speed control class descriptors 24 25What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs 26Date: Dec 2014 27KernelVersion: 3.20 28Description: Full speed control class descriptors 29 30What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal 31Date: Dec 2014 32KernelVersion: 3.20 33Description: Terminal descriptors 34 35What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output 36Date: Dec 2014 37KernelVersion: 3.20 38Description: Output terminal descriptors 39 40What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default 41Date: Dec 2014 42KernelVersion: 3.20 43Description: Default output terminal descriptors 44 45 All attributes read only: 46 iTerminal - index of string descriptor 47 bSourceID - id of the terminal to which this terminal 48 is connected 49 bAssocTerminal - id of the input terminal to which this output 50 terminal is associated 51 wTerminalType - terminal type 52 bTerminalID - a non-zero id of this terminal 53 54What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera 55Date: Dec 2014 56KernelVersion: 3.20 57Description: Camera terminal descriptors 58 59What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default 60Date: Dec 2014 61KernelVersion: 3.20 62Description: Default camera terminal descriptors 63 64 All attributes read only: 65 bmControls - bitmap specifying which controls are 66 supported for the video stream 67 wOcularFocalLength - the value of Locular 68 wObjectiveFocalLengthMax- the value of Lmin 69 wObjectiveFocalLengthMin- the value of Lmax 70 iTerminal - index of string descriptor 71 bAssocTerminal - id of the output terminal to which 72 this terminal is connected 73 wTerminalType - terminal type 74 bTerminalID - a non-zero id of this terminal 75 76What: /config/usb-gadget/gadget/functions/uvc.name/control/processing 77Date: Dec 2014 78KernelVersion: 3.20 79Description: Processing unit descriptors 80 81What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default 82Date: Dec 2014 83KernelVersion: 3.20 84Description: Default processing unit descriptors 85 86 All attributes read only: 87 iProcessing - index of string descriptor 88 bmControls - bitmap specifying which controls are 89 supported for the video stream 90 wMaxMultiplier - maximum digital magnification x100 91 bSourceID - id of the terminal to which this unit is 92 connected 93 bUnitID - a non-zero id of this unit 94 95What: /config/usb-gadget/gadget/functions/uvc.name/control/header 96Date: Dec 2014 97KernelVersion: 3.20 98Description: Control header descriptors 99 100What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name 101Date: Dec 2014 102KernelVersion: 3.20 103Description: Specific control header descriptors 104 105dwClockFrequency 106bcdUVC 107What: /config/usb-gadget/gadget/functions/uvc.name/streaming 108Date: Dec 2014 109KernelVersion: 3.20 110Description: Streaming descriptors 111 112What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class 113Date: Dec 2014 114KernelVersion: 3.20 115Description: Streaming class descriptors 116 117What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss 118Date: Dec 2014 119KernelVersion: 3.20 120Description: Super speed streaming class descriptors 121 122What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs 123Date: Dec 2014 124KernelVersion: 3.20 125Description: High speed streaming class descriptors 126 127What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs 128Date: Dec 2014 129KernelVersion: 3.20 130Description: Full speed streaming class descriptors 131 132What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching 133Date: Dec 2014 134KernelVersion: 3.20 135Description: Color matching descriptors 136 137What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default 138Date: Dec 2014 139KernelVersion: 3.20 140Description: Default color matching descriptors 141 142 All attributes read only: 143 bMatrixCoefficients - matrix used to compute luma and 144 chroma values from the color primaries 145 bTransferCharacteristics- optoelectronic transfer 146 characteristic of the source picutre, 147 also called the gamma function 148 bColorPrimaries - color primaries and the reference 149 white 150 151What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg 152Date: Dec 2014 153KernelVersion: 3.20 154Description: MJPEG format descriptors 155 156What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name 157Date: Dec 2014 158KernelVersion: 3.20 159Description: Specific MJPEG format descriptors 160 161 All attributes read only, 162 except bmaControls and bDefaultFrameIndex: 163 bmaControls - this format's data for bmaControls in 164 the streaming header 165 bmInterfaceFlags - specifies interlace information, 166 read-only 167 bAspectRatioY - the X dimension of the picture aspect 168 ratio, read-only 169 bAspectRatioX - the Y dimension of the picture aspect 170 ratio, read-only 171 bmFlags - characteristics of this format, 172 read-only 173 bDefaultFrameIndex - optimum frame index for this stream 174 175What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name 176Date: Dec 2014 177KernelVersion: 3.20 178Description: Specific MJPEG frame descriptors 179 180 dwFrameInterval - indicates how frame interval can be 181 programmed; a number of values 182 separated by newline can be specified 183 dwDefaultFrameInterval - the frame interval the device would 184 like to use as default 185 dwMaxVideoFrameBufferSize- the maximum number of bytes the 186 compressor will produce for a video 187 frame or still image 188 dwMaxBitRate - the maximum bit rate at the shortest 189 frame interval in bps 190 dwMinBitRate - the minimum bit rate at the longest 191 frame interval in bps 192 wHeight - height of decoded bitmap frame in px 193 wWidth - width of decoded bitmam frame in px 194 bmCapabilities - still image support, fixed frame-rate 195 support 196 197What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed 198Date: Dec 2014 199KernelVersion: 3.20 200Description: Uncompressed format descriptors 201 202What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name 203Date: Dec 2014 204KernelVersion: 3.20 205Description: Specific uncompressed format descriptors 206 207 bmaControls - this format's data for bmaControls in 208 the streaming header 209 bmInterfaceFlags - specifies interlace information, 210 read-only 211 bAspectRatioY - the X dimension of the picture aspect 212 ratio, read-only 213 bAspectRatioX - the Y dimension of the picture aspect 214 ratio, read-only 215 bDefaultFrameIndex - optimum frame index for this stream 216 bBitsPerPixel - number of bits per pixel used to 217 specify color in the decoded video 218 frame 219 guidFormat - globally unique id used to identify 220 stream-encoding format 221 222What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name 223Date: Dec 2014 224KernelVersion: 3.20 225Description: Specific uncompressed frame descriptors 226 227 dwFrameInterval - indicates how frame interval can be 228 programmed; a number of values 229 separated by newline can be specified 230 dwDefaultFrameInterval - the frame interval the device would 231 like to use as default 232 dwMaxVideoFrameBufferSize- the maximum number of bytes the 233 compressor will produce for a video 234 frame or still image 235 dwMaxBitRate - the maximum bit rate at the shortest 236 frame interval in bps 237 dwMinBitRate - the minimum bit rate at the longest 238 frame interval in bps 239 wHeight - height of decoded bitmap frame in px 240 wWidth - width of decoded bitmam frame in px 241 bmCapabilities - still image support, fixed frame-rate 242 support 243 244What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header 245Date: Dec 2014 246KernelVersion: 3.20 247Description: Streaming header descriptors 248 249What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name 250Date: Dec 2014 251KernelVersion: 3.20 252Description: Specific streaming header descriptors 253 254 All attributes read only: 255 bTriggerUsage - how the host software will respond to 256 a hardware trigger interrupt event 257 bTriggerSupport - flag specifying if hardware 258 triggering is supported 259 bStillCaptureMethod - method of still image caputre 260 supported 261 bTerminalLink - id of the output terminal to which 262 the video endpoint of this interface 263 is connected 264 bmInfo - capabilities of this video streaming 265 interface 266