Manha De Carnival Analysis

In Manha de carnival by sigman and bonfa, I think there are two musical ideas, A and B. Idea A is played from the beginning until 1:19. The rhythm is being repeated by percussion instruments with a flowy melody played by piano, brass and woodwind instruments. Idea B begins at 1:20 with a saxophone improvised solo and as it progresses, the notes appear to get shorter and scattered, similar to how jazz sounds. The sax solo continues until 2:19, followed by a piano solo, following the same idea B. Percussion instruments continue with the melody while the piano plays on an improvised solo. The piano solo continues until 3:18 and after, its joined by the rest of the ensemble. For the remaining part of the song, idea A is played. Unity is illustrated