‹sample›

Allows to embed sample data directly in SFZ files (Rapture).

Example #

<region> sample=mysample.wav
<sample> name=mysample.wav data=[encoded-content-of-mysample.wav]

The content encoding is an alphabet mapping of 256 entries that map to each byte. (in the encoding, a WAV file is immediately recognizable by having its four byte “RIFF” header encoded to “|spp”)

This C source file can be compiled to convert a wav file to an embedded sample.

Decoding #

The decoding algorithm is as follows:

• Loop while there is an input byte b1
  • if b1 is the end marker $24, stop reading
  • if b1 is ‘\r’ ($0D) or ‘\n’ ($0A), discard it
  • if b1 is the escape character ‘=’ ($3D),
    • extract the next byte b2, and compute the next output byte as (b2+$C0)%256
  • otherwise, compute the next output byte as (b2+$D6)%256

Encoding #

• Loop while there is an input byte b1
  • if (b1+$2A)%256 is one of the “forbidden characters” ($3D, $00, $09, $0A, $0D, $24)
    • output the escape character $3D, and then output the byte (b1+$40)%256
  • otherwise, output (b1+$2A)%256
• Output the end marker $24

Alphabet #

The alphabet used for the coding is as following: