Decodes audio files and converts sample format to signed 16bit. Can be used as a playback source with rodio.
Decoder implies rodio's Source trait, as well as Iterator. Enable feature
flag rodio_source to include this. Decoder can then be used as a source for Rodio,
with the benefits of being able to decode everything ffmpeg supports.
cargo run --release -- convert path/to/test.mp3
cargo run --release -- play path/to/test.flac