Module decoder 

FLAC audio decoder.

Decodes FLAC frames back into interleaved i32 PCM samples.

Decoding pipeline

1. Parse FLAC stream header (fLaC + STREAMINFO).
2. Parse frame header (sync code, block size, channel count, etc.).
3. Decode each subframe:
   • LPC subframe: read warmup samples, quantised coefficients, Rice residuals, then call restore_signal to reconstruct the channel.
   • Verbatim subframe: read raw 16-bit samples directly.
4. Interleave channels to produce the output PCM block.
5. Verify frame CRC-16.

Structs

DecodedBlock

A decoded PCM block.

FlacDecoder

FLAC audio decoder.

FlacStreamInfo

Information extracted from the FLAC stream header (STREAMINFO metadata block).

FlacVorbisComment

Vendor and user comments extracted from a VORBIS_COMMENT metadata block.