Function read_word_timestamps_json

app/workflow/workflow.cpp:660–678

    if (words_out.has_value()) {
        write_words_result(result, *words_out, id);
    }
    record_result_paths(id, result, audio_out, text_out, words_out, step_dir, context);

    std::cout << "workflow_step=" << id << "\n";
}

std::vector<engine::runtime::WordTimestamp> read_word_timestamps_json(const std::filesystem::path & path) {
    const auto root = engine::io::json::parse_file(path);
    if (!root.is_array()) {
        throw std::runtime_error("word timestamp input must be a JSON array: " + path.string());
    }
    std::vector<engine::runtime::WordTimestamp> words;
    for (const auto & item : root.as_array()) {
        engine::runtime::WordTimestamp word;
        word.span.start_sample = engine::io::json::require_i64(item, "start_sample");
        word.span.end_sample = engine::io::json::require_i64(item, "end_sample");
        word.word = engine::io::json::require_string(item, "word");
        const auto * confidence = item.find("confidence");
        if (confidence != nullptr && !confidence->is_null()) {
            word.confidence = confidence->as_f32();
        }
        words.push_back(std::move(word));