api/test/neteq_simulator_factory.h

/*
 *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef API_TEST_NETEQ_SIMULATOR_FACTORY_H_
#define API_TEST_NETEQ_SIMULATOR_FACTORY_H_

#include <memory>
#include <string>

#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "api/neteq/neteq_factory.h"
#include "api/test/neteq_simulator.h"

namespace webrtc {
namespace test {

class NetEqTestFactory;

class NetEqSimulatorFactory {
 public:
  NetEqSimulatorFactory();
  ~NetEqSimulatorFactory();
  struct Config {
    // The maximum allowed number of packets in the jitter buffer.
    int max_nr_packets_in_buffer = 0;
    // The number of audio packets to insert at the start of the simulation.
    // Since the simulation is done with a replacement audio file, these
    // artificial packets will take a small piece of that replacement audio.
    int initial_dummy_packets = 0;
    // The number of simulation steps to skip at the start of the simulation.
    // This removes incoming packets and GetAudio events from the start of the
    // simulation, until the requested number of GetAudio events has been
    // removed.
    int skip_get_audio_events = 0;
    // A WebRTC field trial string to be used during the simulation.
    std::string field_trial_string;
    // A filename for the generated output audio file.
    absl::optional<std::string> output_audio_filename;
    // A custom NetEqFactory can be used.
    NetEqFactory* neteq_factory = nullptr;
  };
  std::unique_ptr<NetEqSimulator> CreateSimulatorFromFile(
      absl::string_view event_log_filename,
      absl::string_view replacement_audio_filename,
      Config simulation_config);
  // The same as above, but pass the file contents as a string.
  std::unique_ptr<NetEqSimulator> CreateSimulatorFromString(
      absl::string_view event_log_file_contents,
      absl::string_view replacement_audio_file,
      Config simulation_config);

 private:
  std::unique_ptr<NetEqTestFactory> factory_;
};

}  // namespace test
}  // namespace webrtc

#endif  // API_TEST_NETEQ_SIMULATOR_FACTORY_H_