dav1d: Globals

dav1d

- DAV1D_API : common.h
- DAV1D_ERR : common.h
- DAV1D_MAX_CDEF_STRENGTHS : headers.h
- DAV1D_MAX_FRAME_THREADS : dav1d.h
- DAV1D_MAX_OPERATING_POINTS : headers.h
- DAV1D_MAX_SEGMENTS : headers.h
- DAV1D_MAX_TILE_COLS : headers.h
- DAV1D_MAX_TILE_ROWS : headers.h
- DAV1D_MAX_TILE_THREADS : dav1d.h
- DAV1D_NUM_REF_FRAMES : headers.h
- DAV1D_PICTURE_ALIGNMENT : picture.h
- DAV1D_PRIMARY_REF_NONE : headers.h
- DAV1D_REFS_PER_FRAME : headers.h
- DAV1D_TOTAL_REFS_PER_FRAME : headers.h