Function require_string_value

src/models/vibevoice/assets.cpp:55–60

        config.decoder_ratios = config.encoder_ratios;
    }
    for (const auto ratio : config.encoder_ratios) {
        engine::io::require_positive(ratio, label);
    }
    for (const auto ratio : config.decoder_ratios) {
        engine::io::require_positive(ratio, label);
    }
    if (config.mixer_layer != "depthwise_conv") {
        throw std::runtime_error(std::string("VibeVoice config ") + label + " mixer_layer mismatch");
    }