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/*
* Copyright (c) 2020 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 RTC_TOOLS_RTC_EVENT_LOG_VISUALIZER_ANALYZER_COMMON_H_
#define RTC_TOOLS_RTC_EVENT_LOG_VISUALIZER_ANALYZER_COMMON_H_
#include <cstdint>
#include <string>
#include "absl/types/optional.h"
#include "api/function_view.h"
#include "logging/rtc_event_log/rtc_event_log_parser.h"
#include "rtc_tools/rtc_event_log_visualizer/plot_base.h"
namespace webrtc {
constexpr int kNumMicrosecsPerSec = 1000000;
constexpr int kNumMillisecsPerSec = 1000;
constexpr float kLeftMargin = 0.01f;
constexpr float kRightMargin = 0.02f;
constexpr float kBottomMargin = 0.02f;
constexpr float kTopMargin = 0.05f;
class AnalyzerConfig {
public:
float GetCallTimeSec(Timestamp timestamp) const {
Timestamp offset = normalize_time_ ? begin_time_ : Timestamp::Zero();
return static_cast<float>((timestamp - offset).us()) / 1000000;
}
float GetCallTimeSecFromMs(int64_t timestamp_ms) const {
return GetCallTimeSec(Timestamp::Millis(timestamp_ms));
}
float CallBeginTimeSec() const { return GetCallTimeSec(begin_time_); }
float CallEndTimeSec() const { return GetCallTimeSec(end_time_); }
int64_t CallTimeToUtcOffsetMs() {
if (normalize_time_) {
Timestamp utc_begin_time_ = begin_time_ + rtc_to_utc_offset_;
return utc_begin_time_.ms();
}
return rtc_to_utc_offset_.ms();
}
// Window and step size used for calculating moving averages, e.g. bitrate.
// The generated data points will be `step_.ms()` milliseconds apart.
// Only events occurring at most `window_duration_.ms()` milliseconds before
// the current data point will be part of the average.
TimeDelta window_duration_ = TimeDelta::Millis(250);
TimeDelta step_ = TimeDelta::Millis(10);
// First and last events of the log.
Timestamp begin_time_ = Timestamp::MinusInfinity();
Timestamp end_time_ = Timestamp::MinusInfinity();
TimeDelta rtc_to_utc_offset_ = TimeDelta::Zero();
bool normalize_time_;
};
struct LayerDescription {
LayerDescription(uint32_t ssrc, uint8_t spatial_layer, uint8_t temporal_layer)
: ssrc(ssrc),
spatial_layer(spatial_layer),
temporal_layer(temporal_layer) {}
bool operator<(const LayerDescription& other) const {
if (ssrc != other.ssrc)
return ssrc < other.ssrc;
if (spatial_layer != other.spatial_layer)
return spatial_layer < other.spatial_layer;
return temporal_layer < other.temporal_layer;
}
uint32_t ssrc;
uint8_t spatial_layer;
uint8_t temporal_layer;
};
bool IsRtxSsrc(const ParsedRtcEventLog& parsed_log,
PacketDirection direction,
uint32_t ssrc);
bool IsVideoSsrc(const ParsedRtcEventLog& parsed_log,
PacketDirection direction,
uint32_t ssrc);
bool IsAudioSsrc(const ParsedRtcEventLog& parsed_log,
PacketDirection direction,
uint32_t ssrc);
std::string GetStreamName(const ParsedRtcEventLog& parsed_log,
PacketDirection direction,
uint32_t ssrc);
std::string GetLayerName(LayerDescription layer);
// For each element in data_view, use `f()` to extract a y-coordinate and
// store the result in a TimeSeries.
template <typename DataType, typename IterableType>
void ProcessPoints(rtc::FunctionView<float(const DataType&)> fx,
rtc::FunctionView<absl::optional<float>(const DataType&)> fy,
const IterableType& data_view,
TimeSeries* result) {
for (size_t i = 0; i < data_view.size(); i++) {
const DataType& elem = data_view[i];
float x = fx(elem);
absl::optional<float> y = fy(elem);
if (y)
result->points.emplace_back(x, *y);
}
}
// For each pair of adjacent elements in `data`, use `f()` to extract a
// y-coordinate and store the result in a TimeSeries. Note that the x-coordinate
// will be the time of the second element in the pair.
template <typename DataType, typename ResultType, typename IterableType>
void ProcessPairs(
rtc::FunctionView<float(const DataType&)> fx,
rtc::FunctionView<absl::optional<ResultType>(const DataType&,
const DataType&)> fy,
const IterableType& data,
TimeSeries* result) {
for (size_t i = 1; i < data.size(); i++) {
float x = fx(data[i]);
absl::optional<ResultType> y = fy(data[i - 1], data[i]);
if (y)
result->points.emplace_back(x, static_cast<float>(*y));
}
}
// For each pair of adjacent elements in `data`, use `f()` to extract a
// y-coordinate and store the result in a TimeSeries. Note that the x-coordinate
// will be the time of the second element in the pair.
template <typename DataType, typename ResultType, typename IterableType>
void AccumulatePairs(
rtc::FunctionView<float(const DataType&)> fx,
rtc::FunctionView<absl::optional<ResultType>(const DataType&,
const DataType&)> fy,
const IterableType& data,
TimeSeries* result) {
ResultType sum = 0;
for (size_t i = 1; i < data.size(); i++) {
float x = fx(data[i]);
absl::optional<ResultType> y = fy(data[i - 1], data[i]);
if (y) {
sum += *y;
result->points.emplace_back(x, static_cast<float>(sum));
}
}
}
// Calculates a moving average of `data` and stores the result in a TimeSeries.
// A data point is generated every `step` microseconds from `begin_time`
// to `end_time`. The value of each data point is the average of the data
// during the preceding `window_duration_us` microseconds.
template <typename DataType, typename ResultType, typename IterableType>
void MovingAverage(
rtc::FunctionView<absl::optional<ResultType>(const DataType&)> fy,
const IterableType& data_view,
AnalyzerConfig config,
TimeSeries* result) {
size_t window_index_begin = 0;
size_t window_index_end = 0;
ResultType sum_in_window = 0;
for (Timestamp t = config.begin_time_; t < config.end_time_ + config.step_;
t += config.step_) {
while (window_index_end < data_view.size() &&
data_view[window_index_end].log_time() < t) {
absl::optional<ResultType> value = fy(data_view[window_index_end]);
if (value)
sum_in_window += *value;
++window_index_end;
}
while (window_index_begin < data_view.size() &&
data_view[window_index_begin].log_time() <
t - config.window_duration_) {
absl::optional<ResultType> value = fy(data_view[window_index_begin]);
if (value)
sum_in_window -= *value;
++window_index_begin;
}
float window_duration_s =
static_cast<float>(config.window_duration_.us()) / kNumMicrosecsPerSec;
float x = config.GetCallTimeSec(t);
float y = sum_in_window / window_duration_s;
result->points.emplace_back(x, y);
}
}
} // namespace webrtc
#endif // RTC_TOOLS_RTC_EVENT_LOG_VISUALIZER_ANALYZER_COMMON_H_
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