henrik.lundin@webrtc.org | 9a40081 | 2013-01-29 12:09:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "webrtc/modules/audio_coding/neteq4/statistics_calculator.h" |
| 12 | |
| 13 | #include <assert.h> |
pbos@webrtc.org | 3f45c2e | 2013-08-05 16:22:53 +0000 | [diff] [blame] | 14 | #include <string.h> // memset |
henrik.lundin@webrtc.org | 9a40081 | 2013-01-29 12:09:21 +0000 | [diff] [blame] | 15 | |
| 16 | #include "webrtc/modules/audio_coding/neteq4/decision_logic.h" |
| 17 | #include "webrtc/modules/audio_coding/neteq4/delay_manager.h" |
| 18 | |
| 19 | namespace webrtc { |
| 20 | |
| 21 | StatisticsCalculator::StatisticsCalculator() |
| 22 | : preemptive_samples_(0), |
| 23 | accelerate_samples_(0), |
| 24 | added_zero_samples_(0), |
| 25 | expanded_voice_samples_(0), |
| 26 | expanded_noise_samples_(0), |
| 27 | discarded_packets_(0), |
| 28 | lost_timestamps_(0), |
| 29 | last_report_timestamp_(0), |
| 30 | len_waiting_times_(0), |
| 31 | next_waiting_time_index_(0) { |
| 32 | memset(waiting_times_, 0, kLenWaitingTimes * sizeof(waiting_times_[0])); |
| 33 | } |
| 34 | |
| 35 | void StatisticsCalculator::Reset() { |
| 36 | preemptive_samples_ = 0; |
| 37 | accelerate_samples_ = 0; |
| 38 | added_zero_samples_ = 0; |
| 39 | expanded_voice_samples_ = 0; |
| 40 | expanded_noise_samples_ = 0; |
| 41 | } |
| 42 | |
| 43 | void StatisticsCalculator::ResetMcu() { |
| 44 | discarded_packets_ = 0; |
| 45 | lost_timestamps_ = 0; |
| 46 | last_report_timestamp_ = 0; |
| 47 | } |
| 48 | |
| 49 | void StatisticsCalculator::ResetWaitingTimeStatistics() { |
| 50 | memset(waiting_times_, 0, kLenWaitingTimes * sizeof(waiting_times_[0])); |
| 51 | len_waiting_times_ = 0; |
| 52 | next_waiting_time_index_ = 0; |
| 53 | } |
| 54 | |
| 55 | void StatisticsCalculator::ExpandedVoiceSamples(int num_samples) { |
| 56 | expanded_voice_samples_ += num_samples; |
| 57 | } |
| 58 | |
| 59 | void StatisticsCalculator::ExpandedNoiseSamples(int num_samples) { |
| 60 | expanded_noise_samples_ += num_samples; |
| 61 | } |
| 62 | |
| 63 | void StatisticsCalculator::PreemptiveExpandedSamples(int num_samples) { |
| 64 | preemptive_samples_ += num_samples; |
| 65 | } |
| 66 | |
| 67 | void StatisticsCalculator::AcceleratedSamples(int num_samples) { |
| 68 | accelerate_samples_ += num_samples; |
| 69 | } |
| 70 | |
| 71 | void StatisticsCalculator::AddZeros(int num_samples) { |
| 72 | added_zero_samples_ += num_samples; |
| 73 | } |
| 74 | |
| 75 | void StatisticsCalculator::PacketsDiscarded(int num_packets) { |
| 76 | discarded_packets_ += num_packets; |
| 77 | } |
| 78 | |
| 79 | void StatisticsCalculator::LostSamples(int num_samples) { |
| 80 | lost_timestamps_ += num_samples; |
| 81 | } |
| 82 | |
| 83 | void StatisticsCalculator::IncreaseCounter(int num_samples, int fs_hz) { |
| 84 | last_report_timestamp_ += num_samples; |
| 85 | if (last_report_timestamp_ > |
| 86 | static_cast<uint32_t>(fs_hz * kMaxReportPeriod)) { |
| 87 | lost_timestamps_ = 0; |
| 88 | last_report_timestamp_ = 0; |
| 89 | discarded_packets_ = 0; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | void StatisticsCalculator::StoreWaitingTime(int waiting_time_ms) { |
| 94 | assert(next_waiting_time_index_ < kLenWaitingTimes); |
| 95 | waiting_times_[next_waiting_time_index_] = waiting_time_ms; |
| 96 | next_waiting_time_index_++; |
| 97 | if (next_waiting_time_index_ >= kLenWaitingTimes) { |
| 98 | next_waiting_time_index_ = 0; |
| 99 | } |
| 100 | if (len_waiting_times_ < kLenWaitingTimes) { |
| 101 | len_waiting_times_++; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | void StatisticsCalculator::GetNetworkStatistics( |
| 106 | int fs_hz, |
| 107 | int num_samples_in_buffers, |
| 108 | int samples_per_packet, |
| 109 | const DelayManager& delay_manager, |
| 110 | const DecisionLogic& decision_logic, |
| 111 | NetEqNetworkStatistics *stats) { |
| 112 | if (fs_hz <= 0 || !stats) { |
| 113 | assert(false); |
| 114 | return; |
| 115 | } |
| 116 | |
| 117 | stats->added_zero_samples = added_zero_samples_; |
| 118 | stats->current_buffer_size_ms = num_samples_in_buffers * 1000 / fs_hz; |
| 119 | const int ms_per_packet = decision_logic.packet_length_samples() / |
| 120 | (fs_hz / 1000); |
| 121 | stats->preferred_buffer_size_ms = (delay_manager.TargetLevel() >> 8) * |
| 122 | ms_per_packet; |
| 123 | stats->jitter_peaks_found = delay_manager.PeakFound(); |
| 124 | stats->clockdrift_ppm = delay_manager.AverageIAT(); |
| 125 | |
| 126 | stats->packet_loss_rate = CalculateQ14Ratio(lost_timestamps_, |
| 127 | last_report_timestamp_); |
| 128 | |
| 129 | const unsigned discarded_samples = discarded_packets_ * samples_per_packet; |
| 130 | stats->packet_discard_rate = CalculateQ14Ratio(discarded_samples, |
| 131 | last_report_timestamp_); |
| 132 | |
| 133 | stats->accelerate_rate = CalculateQ14Ratio(accelerate_samples_, |
| 134 | last_report_timestamp_); |
| 135 | |
| 136 | stats->preemptive_rate = CalculateQ14Ratio(preemptive_samples_, |
| 137 | last_report_timestamp_); |
| 138 | |
| 139 | stats->expand_rate = CalculateQ14Ratio(expanded_voice_samples_ + |
| 140 | expanded_noise_samples_, |
| 141 | last_report_timestamp_); |
| 142 | |
| 143 | // Reset counters. |
| 144 | ResetMcu(); |
| 145 | Reset(); |
| 146 | } |
| 147 | |
| 148 | void StatisticsCalculator::WaitingTimes(std::vector<int>* waiting_times) { |
| 149 | if (!waiting_times) { |
| 150 | return; |
| 151 | } |
| 152 | waiting_times->assign(waiting_times_, waiting_times_ + len_waiting_times_); |
| 153 | ResetWaitingTimeStatistics(); |
| 154 | } |
| 155 | |
| 156 | int StatisticsCalculator::CalculateQ14Ratio(uint32_t numerator, |
| 157 | uint32_t denominator) { |
| 158 | if (numerator == 0) { |
| 159 | return 0; |
| 160 | } else if (numerator < denominator) { |
| 161 | // Ratio must be smaller than 1 in Q14. |
| 162 | assert((numerator << 14) / denominator < (1 << 14)); |
| 163 | return (numerator << 14) / denominator; |
| 164 | } else { |
| 165 | // Will not produce a ratio larger than 1, since this is probably an error. |
| 166 | return 1 << 14; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | } // namespace webrtc |