Function parse_step_backend

app/workflow/workflow.cpp:561–577

        std::filesystem::create_directories(path.parent_path());
    }
    std::ofstream out(path);
    out << word_timestamps_to_json(result.word_timestamps) << "\n";
    std::cout << "words_out=" << path.string() << "\n";
}

engine::core::BackendConfig parse_step_backend(
    const engine::io::json::Value & step,
    engine::core::BackendConfig fallback) {
    if (const auto backend = workflow_optional_string(step, "backend")) {
        fallback.type = minitts::cli::parse_backend(*backend);
    }
    if (const auto device = workflow_optional_number(step, "device")) {
        fallback.device = static_cast<int>(*device);
    }
    if (const auto threads = workflow_optional_number(step, "threads")) {
        fallback.threads = static_cast<int>(*threads);
    }
    if (fallback.threads <= 0) {
        throw std::runtime_error("workflow step threads must be positive");
    }