The protobuf module is a simple library for parsing Protocol Buffers messages in the form of bitstrings. It has the following API:

Message = [
    [{field_number, FieldNumber}, {field_type, FieldType}, {value, Value}]
    , ...].

• Message = parse_message(BitString)
• BitString = parse_message(Message) - create a message
• encode_signed(Int, 32) - convert signed int32 to Procol Buffers wire format (ZigZag)
• encode_signed(Int, 64) - convert signed int64 to ZigZag format
• decode_signed(Int) - convert ZigZag number to signed integer

Example code:

BitString = <<16#12, 16#07, 16#74, 16#65, 16#73, 16#74, 16#69, 16#6e, 16#67, 16#08, 16#96, 16#01>>.
Message = protobuf:parse_message(BitString).