Fabio
c36510c21e
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86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
#pragma once
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#include <cstdint>
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#include <stdexcept>
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#include <filesystem>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <vector>
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namespace engine::models::sanotts {
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/** Thrown by encode() when a chunk phonemizes past the duration model's
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* token limit; the session responds by bisecting the chunk. */
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struct SanoTtsTooLongError : std::runtime_error {
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using std::runtime_error::runtime_error;
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};
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struct SanoTtsEncoded {
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std::vector<int32_t> token_ids;
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std::string dropped; // symbols outside the vocabulary, for tracing
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};
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/**
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* Text -> the 62-symbol phoneme ids the sanoTTS front end was trained on.
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*
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* eSpeak-ng produces the IPA; misaki's E2M table then rewrites it into the
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* character-level inventory this model uses. Both steps are reproduced from
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* the project's own JavaScript and Python front ends so the three agree
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* symbol for symbol.
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*
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* The shared adapter uses an external library by default. Opt-in static
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* builds link eSpeak-ng (GPL-3.0-or-later); its data remains separate.
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*/
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class SanoTtsFrontend {
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public:
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SanoTtsFrontend(
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std::filesystem::path espeak_library_path,
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std::filesystem::path espeak_data_path,
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int64_t max_tokens);
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~SanoTtsFrontend();
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[[nodiscard]] SanoTtsEncoded encode(const std::string & text) const;
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/** Long-form splitting on sentence punctuation, then a codepoint budget. */
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[[nodiscard]] static std::vector<std::string> split_text(
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const std::string & text,
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int64_t max_codepoints);
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/** Pause inserted between chunks, longer after a sentence end. */
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[[nodiscard]] static double boundary_pause_seconds(const std::string & chunk);
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private:
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struct Impl;
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std::unique_ptr<Impl> impl_;
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int64_t max_tokens_;
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};
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/**
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* Text -> Piper phoneme ids for the piperlite voices.
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*
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* Reproduces piper's phonemize_espeak / phonemes_to_ids convention through
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* the same eSpeak-ng library: phonemizer-style punctuation preservation,
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* NFD decomposition to single codepoints, then the voice's phoneme_id_map
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* with [BOS, PAD, (id, PAD)..., EOS] framing. Deterministic per voice.
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*/
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class SanoTtsPiperFrontend {
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public:
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SanoTtsPiperFrontend(
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std::filesystem::path espeak_library_path,
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std::filesystem::path espeak_data_path,
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std::string espeak_voice,
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std::unordered_map<std::string, int32_t> phoneme_id_map,
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int64_t max_tokens);
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~SanoTtsPiperFrontend();
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[[nodiscard]] SanoTtsEncoded encode(const std::string & text) const;
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private:
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struct Impl;
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std::unique_ptr<Impl> impl_;
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std::unordered_map<std::string, int32_t> id_map_;
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int64_t max_tokens_;
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};
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} // namespace engine::models::sanotts
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