git: 9front

ref: 09645d2dd7a2832f0e2292c70d4b63fc5d31f2ac
dir: /sys/src/cmd/nusb/cam/fns.h/

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char *ctlread(Cam *);
void printDescriptor(Fmt *, Iface *, void *);
int videoopen(Cam *, int);
void videoclose(Cam *);
void videoread(Req *, Cam *, int);
void videoflush(Req *, Cam *);
int getframedesc(Cam *, int, int, Format **, VSUncompressedFrame **);
int ctlwrite(Cam *, char *);