shabdakosh

shabdakosh (Sanskrit: dictionary) — Pronunciation dictionary crate for AGNOS.

Maps words to svara Phoneme sequences using a 5,000+ entry English dictionary derived from the CMU Pronouncing Dictionary.

Features

• 5,000+ entry English dictionary generated at compile time from CMUdict (zero runtime parsing)
• ARPABET mapping — bidirectional conversion between ARPABET notation and svara phonemes
• User overlay — application-specific entries that override the base dictionary
• Import/export — CMUdict text format (no_std) and JSON (with json feature)
• no_std compatible — works with alloc, no standard library required

Quick Start

use shabdakosh::PronunciationDict;

let dict = PronunciationDict::english();
assert!(dict.lookup("hello").is_some());
assert!(dict.len() >= 5000);

User Overlay

Override or extend the built-in dictionary with application-specific pronunciations:

use shabdakosh::PronunciationDict;
use svara::phoneme::Phoneme;

let mut dict = PronunciationDict::english();

// Add a custom word
dict.insert_user("agnos", &[
    Phoneme::VowelAsh,
    Phoneme::PlosiveG,
    Phoneme::NasalN,
    Phoneme::VowelO,
    Phoneme::FricativeS,
]);

// User entries take precedence over base entries
assert!(dict.lookup("agnos").is_some());

Import/Export

use shabdakosh::dictionary::format;

// Parse CMUdict format
let input = "hello  HH AH0 L OW1\nworld  W ER1 L D\n";
let dict = format::parse_cmudict(input).unwrap();

// Export back to CMUdict format
let output = format::to_cmudict(&dict);

Feature Flags

Architecture

                   shabdakosh
                  /          \
         arpabet              dictionary
    (ARPABET <-> Phoneme)    /          \
                          mod.rs      format.rs
                     (PronunciationDict,  (CMUdict/JSON
                      user overlay,        import/export)
                      generated 5K dict)

Consumers

• shabda — G2P engine (re-exports shabdakosh types)
• dhvani — Audio engine
• vansh — Voice AI shell

License

GPL-3.0-only