void SoxEffectsChain::addEffect()

in torchaudio/csrc/sox/effects_chain.cpp [268:312]

• 42 lines of code
• 10 McCabe index (conditional complexity)

void SoxEffectsChain::addEffect(const std::vector<std::string> effect) {
  const auto num_args = effect.size();
  if (num_args == 0) {
    throw std::runtime_error("Invalid argument: empty effect.");
  }
  const auto name = effect[0];
  if (UNSUPPORTED_EFFECTS.find(name) != UNSUPPORTED_EFFECTS.end()) {
    std::ostringstream stream;
    stream << "Unsupported effect: " << name;
    throw std::runtime_error(stream.str());
  }

  auto returned_effect = sox_find_effect(name.c_str());
  if (!returned_effect) {
    std::ostringstream stream;
    stream << "Unsupported effect: " << name;
    throw std::runtime_error(stream.str());
  }
  SoxEffect e(sox_create_effect(returned_effect));
  const auto num_options = num_args - 1;

  std::vector<char*> opts;
  for (size_t i = 1; i < num_args; ++i) {
    opts.push_back((char*)effect[i].c_str());
  }
  if (sox_effect_options(e, num_options, num_options ? opts.data() : nullptr) !=
      SOX_SUCCESS) {
    std::ostringstream stream;
    stream << "Invalid effect option:";
    for (const auto& v : effect) {
      stream << " " << v;
    }
    throw std::runtime_error(stream.str());
  }

  if (sox_add_effect(sec_, e, &interm_sig_, &in_sig_) != SOX_SUCCESS) {
    std::ostringstream stream;
    stream << "Internal Error: Failed to add effect: \"" << name;
    for (size_t i = 1; i < num_args; ++i) {
      stream << " " << effect[i];
    }
    stream << "\"";
    throw std::runtime_error(stream.str());
  }
}