LOWER_MASK         74 libavutil/random.c         y = (state->mt[kk] & UPPER_MASK) | (state->mt[kk + 1] & LOWER_MASK);
LOWER_MASK         78 libavutil/random.c         y = (state->mt[kk] & UPPER_MASK) | (state->mt[kk + 1] & LOWER_MASK);
LOWER_MASK         81 libavutil/random.c     y = (state->mt[AV_RANDOM_N - 1] & UPPER_MASK) | (state->mt[0] & LOWER_MASK);