83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
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/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef API_TEST_NETEQ_SIMULATOR_H_
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#define API_TEST_NETEQ_SIMULATOR_H_
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#include <stdint.h>
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#include <map>
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#include <vector>
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namespace webrtc {
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namespace test {
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class NetEqSimulator {
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public:
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virtual ~NetEqSimulator() = default;
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enum class Action { kNormal, kExpand, kAccelerate, kPreemptiveExpand };
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// The results of one simulation step.
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struct SimulationStepResult {
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SimulationStepResult();
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SimulationStepResult(const SimulationStepResult& other);
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~SimulationStepResult();
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bool is_simulation_finished = false;
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// The amount of audio produced (in ms) with the actions in this time step.
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std::map<Action, int> action_times_ms;
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// The amount of wall clock time (in ms) that elapsed since the previous
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// event. This is not necessarily equal to the sum of the values in
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// action_times_ms.
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int64_t simulation_step_ms = 0;
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};
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struct NetEqState {
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NetEqState();
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NetEqState(const NetEqState& other);
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~NetEqState();
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// The sum of the packet buffer and sync buffer delay.
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int current_delay_ms = 0;
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// An indicator that packet loss occurred since the last GetAudio event.
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bool packet_loss_occurred = false;
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// An indicator that the packet buffer has been flushed since the last
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// GetAudio event.
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bool packet_buffer_flushed = false;
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// Indicates if the next needed packet is available in the buffer.
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bool next_packet_available = false;
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// The inter-arrival times in ms of the packets that have arrived since the
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// last GetAudio event.
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std::vector<int> packet_iat_ms;
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// The current packet size in ms.
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int packet_size_ms = 0;
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};
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// Runs the simulation until the end. Returns the duration of the produced
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// audio in ms.
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virtual int64_t Run() = 0;
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// Runs the simulation until we hit the next GetAudio event. If the simulation
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// is finished, is_simulation_finished will be set to true in the returned
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// SimulationStepResult.
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virtual SimulationStepResult RunToNextGetAudio() = 0;
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// Set the next action to be taken by NetEq. This will override any action
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// that NetEq would normally decide to take.
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virtual void SetNextAction(Action next_operation) = 0;
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// Get the current state of NetEq.
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virtual NetEqState GetNetEqState() = 0;
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};
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} // namespace test
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} // namespace webrtc
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#endif // API_TEST_NETEQ_SIMULATOR_H_
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