Symphonia: Decoded frame count doesn't match the file's frame count

First of all, thanks for making and sharing this library, I’m very happy to have discovered it, kudos!

I’ve noticed some behaviour that I don’t understand while decoding some .wav files (I haven’t checked all of their formats, but typically they’re stereo 16bit, 44.1k, PCM).

Is it expected that the sum of all decoded AudioBufferRef frame counts should match the n_frames value defined in the track’s codec params? I’m finding that in the last decoded packet, there are sometimes extra frames in the buffer, which then contain data that isn’t in the file (e.g. Each buffer’s frame count is 1158 through the file, then the final buffer contains 541 frames, when there are only 118 frames remaining according to the count).

I can share an example if you like but I figured I’d better check first if I’m just misunderstanding something in the API.