MAX_DQ_UV         390 third_party/libwebp/enc/quant.c   dq_uv_ac = (enc->uv_alpha_ - MID_ALPHA) * (MAX_DQ_UV - MIN_DQ_UV)
MAX_DQ_UV         395 third_party/libwebp/enc/quant.c   dq_uv_ac = clip(dq_uv_ac, MIN_DQ_UV, MAX_DQ_UV);