Play the audio data received by the serial port

[KevinChau9527]

Due to historical reasons, my product has only one serial port that can receive data. Now I need to decode the OPUS data received by the serial port and then play it on the MAX98357 chip through I2S.
What do I need to do to combine the serial port data with the decoding library to output audio? Or is there any example in the project that meets my scenario?