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/*
* Copyright (c) 2013 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 WEBRTC_MODULES_AUDIO_CODING_NETEQ4_STATISTICS_CALCULATOR_H_
#define WEBRTC_MODULES_AUDIO_CODING_NETEQ4_STATISTICS_CALCULATOR_H_
#include <vector>
#include "webrtc/base/constructormagic.h"
#include "webrtc/modules/audio_coding/neteq4/interface/neteq.h"
#include "webrtc/typedefs.h"
namespace webrtc {
// Forward declarations.
class DecisionLogic;
class DelayManager;
// This class handles various network statistics in NetEq.
class StatisticsCalculator {
public:
StatisticsCalculator();
virtual ~StatisticsCalculator() {}
// Resets most of the counters.
void Reset();
// Resets the counters that are not handled by Reset().
void ResetMcu();
// Resets the waiting time statistics.
void ResetWaitingTimeStatistics();
// Reports that |num_samples| samples were produced through expansion, and
// that the expansion produced other than just noise samples.
void ExpandedVoiceSamples(int num_samples);
// Reports that |num_samples| samples were produced through expansion, and
// that the expansion produced only noise samples.
void ExpandedNoiseSamples(int num_samples);
// Reports that |num_samples| samples were produced through preemptive
// expansion.
void PreemptiveExpandedSamples(int num_samples);
// Reports that |num_samples| samples were removed through accelerate.
void AcceleratedSamples(int num_samples);
// Reports that |num_samples| zeros were inserted into the output.
void AddZeros(int num_samples);
// Reports that |num_packets| packets were discarded.
void PacketsDiscarded(int num_packets);
// Reports that |num_samples| were lost.
void LostSamples(int num_samples);
// Increases the report interval counter with |num_samples| at a sample rate
// of |fs_hz|.
void IncreaseCounter(int num_samples, int fs_hz);
// Stores new packet waiting time in waiting time statistics.
void StoreWaitingTime(int waiting_time_ms);
// Returns the current network statistics in |stats|. The current sample rate
// is |fs_hz|, the total number of samples in packet buffer and sync buffer
// yet to play out is |num_samples_in_buffers|, and the number of samples per
// packet is |samples_per_packet|.
void GetNetworkStatistics(int fs_hz,
int num_samples_in_buffers,
int samples_per_packet,
const DelayManager& delay_manager,
const DecisionLogic& decision_logic,
NetEqNetworkStatistics *stats);
void WaitingTimes(std::vector<int>* waiting_times);
private:
static const int kMaxReportPeriod = 60; // Seconds before auto-reset.
static const int kLenWaitingTimes = 100;
// Calculates numerator / denominator, and returns the value in Q14.
static int CalculateQ14Ratio(uint32_t numerator, uint32_t denominator);
uint32_t preemptive_samples_;
uint32_t accelerate_samples_;
int added_zero_samples_;
uint32_t expanded_voice_samples_;
uint32_t expanded_noise_samples_;
int discarded_packets_;
uint32_t lost_timestamps_;
uint32_t last_report_timestamp_;
int waiting_times_[kLenWaitingTimes]; // Used as a circular buffer.
int len_waiting_times_;
int next_waiting_time_index_;
DISALLOW_COPY_AND_ASSIGN(StatisticsCalculator);
};
} // namespace webrtc
#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ4_STATISTICS_CALCULATOR_H_
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