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/*
* 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_H_
#define API_TEST_NETEQ_SIMULATOR_H_
#include <stdint.h>
#include <map>
#include <vector>
namespace webrtc {
namespace test {
class NetEqSimulator {
public:
virtual ~NetEqSimulator() = default;
enum class Action { kNormal, kExpand, kAccelerate, kPreemptiveExpand };
// The results of one simulation step.
struct SimulationStepResult {
SimulationStepResult();
SimulationStepResult(const SimulationStepResult& other);
~SimulationStepResult();
bool is_simulation_finished = false;
// The amount of audio produced (in ms) with the actions in this time step.
std::map<Action, int> action_times_ms;
// The amount of wall clock time (in ms) that elapsed since the previous
// event. This is not necessarily equal to the sum of the values in
// action_times_ms.
int64_t simulation_step_ms = 0;
};
struct NetEqState {
NetEqState();
NetEqState(const NetEqState& other);
~NetEqState();
// The sum of the packet buffer and sync buffer delay.
int current_delay_ms = 0;
// An indicator that packet loss occurred since the last GetAudio event.
bool packet_loss_occurred = false;
// An indicator that the packet buffer has been flushed since the last
// GetAudio event.
bool packet_buffer_flushed = false;
// Indicates if the next needed packet is available in the buffer.
bool next_packet_available = false;
// The inter-arrival times in ms of the packets that have arrived since the
// last GetAudio event.
std::vector<int> packet_iat_ms;
// The current packet size in ms.
int packet_size_ms = 0;
};
// Runs the simulation until the end. Returns the duration of the produced
// audio in ms.
virtual int64_t Run() = 0;
// Runs the simulation until we hit the next GetAudio event. If the simulation
// is finished, is_simulation_finished will be set to true in the returned
// SimulationStepResult.
virtual SimulationStepResult RunToNextGetAudio() = 0;
// Set the next action to be taken by NetEq. This will override any action
// that NetEq would normally decide to take.
virtual void SetNextAction(Action next_operation) = 0;
// Get the current state of NetEq.
virtual NetEqState GetNetEqState() = 0;
};
} // namespace test
} // namespace webrtc
#endif // API_TEST_NETEQ_SIMULATOR_H_
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