ref: 87d40c9c17a6e021cdba092b78594cc93ce02ac0
dir: /frame.h/
typedef struct Frame Frame; struct Frame { uvlong dt; int w, h; struct { int left, top, right, bottom; }crop; u8int *yuv[3]; int ystride; int uvstride; u8int data[1]; }; Frame *newframe(int w, int h, u8int *yuv[3], int ystride, int vstride);