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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 VIDEO_SEND_STATISTICS_PROXY_H_
#define VIDEO_SEND_STATISTICS_PROXY_H_
#include <array>
#include <deque>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "api/field_trials_view.h"
#include "api/video/video_codec_constants.h"
#include "call/video_send_stream.h"
#include "modules/include/module_common_types_public.h"
#include "modules/rtp_rtcp/include/report_block_data.h"
#include "modules/video_coding/include/video_codec_interface.h"
#include "modules/video_coding/include/video_coding_defines.h"
#include "rtc_base/numerics/exp_filter.h"
#include "rtc_base/rate_tracker.h"
#include "rtc_base/synchronization/mutex.h"
#include "rtc_base/thread_annotations.h"
#include "system_wrappers/include/clock.h"
#include "video/config/video_encoder_config.h"
#include "video/quality_limitation_reason_tracker.h"
#include "video/report_block_stats.h"
#include "video/stats_counter.h"
#include "video/video_stream_encoder_observer.h"
namespace webrtc {
class SendStatisticsProxy : public VideoStreamEncoderObserver,
public ReportBlockDataObserver,
public RtcpPacketTypeCounterObserver,
public StreamDataCountersCallback,
public BitrateStatisticsObserver,
public FrameCountObserver {
public:
static constexpr TimeDelta kStatsTimeout = TimeDelta::Seconds(5);
// Number of required samples to be collected before a metric is added
// to a rtc histogram.
static const int kMinRequiredMetricsSamples = 200;
SendStatisticsProxy(Clock* clock,
const VideoSendStream::Config& config,
VideoEncoderConfig::ContentType content_type,
const FieldTrialsView& field_trials);
~SendStatisticsProxy() override;
virtual VideoSendStream::Stats GetStats();
void OnSendEncodedImage(const EncodedImage& encoded_image,
const CodecSpecificInfo* codec_info) override;
void OnEncoderImplementationChanged(
EncoderImplementation implementation) override;
// Used to update incoming frame rate.
void OnIncomingFrame(int width, int height) override;
// Dropped frame stats.
void OnFrameDropped(DropReason) override;
// Adaptation stats.
void OnAdaptationChanged(
VideoAdaptationReason reason,
const VideoAdaptationCounters& cpu_counters,
const VideoAdaptationCounters& quality_counters) override;
void ClearAdaptationStats() override;
void UpdateAdaptationSettings(AdaptationSettings cpu_settings,
AdaptationSettings quality_settings) override;
void OnBitrateAllocationUpdated(
const VideoCodec& codec,
const VideoBitrateAllocation& allocation) override;
void OnEncoderInternalScalerUpdate(bool is_scaled) override;
void OnMinPixelLimitReached() override;
void OnInitialQualityResolutionAdaptDown() override;
void OnSuspendChange(bool is_suspended) override;
void OnInactiveSsrc(uint32_t ssrc);
// Used to indicate change in content type, which may require a change in
// how stats are collected.
void OnEncoderReconfigured(const VideoEncoderConfig& encoder_config,
const std::vector<VideoStream>& streams) override;
// Used to update the encoder target rate.
void OnSetEncoderTargetRate(uint32_t bitrate_bps);
// Implements CpuOveruseMetricsObserver.
void OnEncodedFrameTimeMeasured(int encode_time_ms,
int encode_usage_percent) override;
void OnSendPacket(uint32_t ssrc, Timestamp capture_time);
int GetInputFrameRate() const override;
int GetSendFrameRate() const;
protected:
// From ReportBlockDataObserver.
void OnReportBlockDataUpdated(ReportBlockData report_block_data) override;
// From RtcpPacketTypeCounterObserver.
void RtcpPacketTypesCounterUpdated(
uint32_t ssrc,
const RtcpPacketTypeCounter& packet_counter) override;
// From StreamDataCountersCallback.
void DataCountersUpdated(const StreamDataCounters& counters,
uint32_t ssrc) override;
// From BitrateStatisticsObserver.
void Notify(uint32_t total_bitrate_bps,
uint32_t retransmit_bitrate_bps,
uint32_t ssrc) override;
// From FrameCountObserver.
void FrameCountUpdated(const FrameCounts& frame_counts,
uint32_t ssrc) override;
private:
class SampleCounter {
public:
SampleCounter() : sum(0), num_samples(0) {}
~SampleCounter() {}
void Add(int sample);
int Avg(int64_t min_required_samples) const;
private:
int64_t sum;
int64_t num_samples;
};
class BoolSampleCounter {
public:
BoolSampleCounter() : sum(0), num_samples(0) {}
~BoolSampleCounter() {}
void Add(bool sample);
void Add(bool sample, int64_t count);
int Percent(int64_t min_required_samples) const;
int Permille(int64_t min_required_samples) const;
private:
int Fraction(int64_t min_required_samples, float multiplier) const;
int64_t sum;
int64_t num_samples;
};
struct TargetRateUpdates {
TargetRateUpdates()
: pause_resume_events(0), last_paused_or_resumed(false), last_ms(-1) {}
int pause_resume_events;
bool last_paused_or_resumed;
int64_t last_ms;
};
struct FallbackEncoderInfo {
FallbackEncoderInfo();
bool is_possible = true;
bool is_active = false;
int on_off_events = 0;
int64_t elapsed_ms = 0;
absl::optional<int64_t> last_update_ms;
const int max_frame_diff_ms = 2000;
};
struct FallbackEncoderInfoDisabled {
bool is_possible = true;
bool min_pixel_limit_reached = false;
};
struct StatsTimer {
void Start(int64_t now_ms);
void Stop(int64_t now_ms);
void Restart(int64_t now_ms);
int64_t start_ms = -1;
int64_t total_ms = 0;
};
struct QpCounters {
SampleCounter vp8; // QP range: 0-127.
SampleCounter vp9; // QP range: 0-255.
SampleCounter h264; // QP range: 0-51.
};
struct AdaptChanges {
int down = 0;
int up = 0;
};
// Map holding encoded frames (mapped by timestamp).
// If simulcast layers are encoded on different threads, there is no guarantee
// that one frame of all layers are encoded before the next start.
struct TimestampOlderThan {
bool operator()(uint32_t ts1, uint32_t ts2) const {
return IsNewerTimestamp(ts2, ts1);
}
};
struct Frame {
Frame(int64_t send_ms, uint32_t width, uint32_t height, int simulcast_idx)
: send_ms(send_ms),
max_width(width),
max_height(height),
max_simulcast_idx(simulcast_idx) {}
const int64_t
send_ms; // Time when first frame with this timestamp is sent.
uint32_t max_width; // Max width with this timestamp.
uint32_t max_height; // Max height with this timestamp.
int max_simulcast_idx; // Max simulcast index with this timestamp.
};
typedef std::map<uint32_t, Frame, TimestampOlderThan> EncodedFrameMap;
void PurgeOldStats() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
VideoSendStream::StreamStats* GetStatsEntry(uint32_t ssrc)
RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
struct MaskedAdaptationCounts {
absl::optional<int> resolution_adaptations = absl::nullopt;
absl::optional<int> num_framerate_reductions = absl::nullopt;
};
struct Adaptations {
public:
MaskedAdaptationCounts MaskedCpuCounts() const;
MaskedAdaptationCounts MaskedQualityCounts() const;
void set_cpu_counts(const VideoAdaptationCounters& cpu_counts);
void set_quality_counts(const VideoAdaptationCounters& quality_counts);
VideoAdaptationCounters cpu_counts() const;
VideoAdaptationCounters quality_counts() const;
void UpdateMaskingSettings(AdaptationSettings cpu_settings,
AdaptationSettings quality_settings);
private:
VideoAdaptationCounters cpu_counts_;
AdaptationSettings cpu_settings_;
VideoAdaptationCounters quality_counts_;
AdaptationSettings quality_settings_;
MaskedAdaptationCounts Mask(const VideoAdaptationCounters& counters,
const AdaptationSettings& settings) const;
};
// Collection of various stats that are tracked per ssrc.
struct Trackers {
struct SendDelayEntry {
Timestamp when;
TimeDelta send_delay;
};
Trackers();
Trackers(const Trackers&) = delete;
Trackers& operator=(const Trackers&) = delete;
void AddSendDelay(Timestamp now, TimeDelta send_delay);
Timestamp resolution_update = Timestamp::MinusInfinity();
rtc::RateTracker encoded_frame_rate;
std::deque<SendDelayEntry> send_delays;
// The sum of `send_delay` in `send_delays`.
TimeDelta send_delay_sum = TimeDelta::Zero();
// Pointer to the maximum `send_delay` in `send_delays` or nullptr if
// `send_delays.empty()`
const TimeDelta* send_delay_max = nullptr;
};
void SetAdaptTimer(const MaskedAdaptationCounts& counts, StatsTimer* timer)
RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
void UpdateAdaptationStats() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
void TryUpdateInitialQualityResolutionAdaptUp(
absl::optional<int> old_quality_downscales,
absl::optional<int> updated_quality_downscales)
RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
void UpdateEncoderFallbackStats(const CodecSpecificInfo* codec_info,
int pixels,
int simulcast_index)
RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
void UpdateFallbackDisabledStats(const CodecSpecificInfo* codec_info,
int pixels,
int simulcast_index)
RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
Clock* const clock_;
const std::string payload_name_;
const RtpConfig rtp_config_;
const absl::optional<int> fallback_max_pixels_;
const absl::optional<int> fallback_max_pixels_disabled_;
mutable Mutex mutex_;
VideoEncoderConfig::ContentType content_type_ RTC_GUARDED_BY(mutex_);
const int64_t start_ms_;
VideoSendStream::Stats stats_ RTC_GUARDED_BY(mutex_);
rtc::ExpFilter encode_time_ RTC_GUARDED_BY(mutex_);
QualityLimitationReasonTracker quality_limitation_reason_tracker_
RTC_GUARDED_BY(mutex_);
rtc::RateTracker media_byte_rate_tracker_ RTC_GUARDED_BY(mutex_);
rtc::RateTracker encoded_frame_rate_tracker_ RTC_GUARDED_BY(mutex_);
// Trackers mapped by ssrc.
std::map<uint32_t, Trackers> trackers_ RTC_GUARDED_BY(mutex_);
absl::optional<int64_t> last_outlier_timestamp_ RTC_GUARDED_BY(mutex_);
int last_num_spatial_layers_ RTC_GUARDED_BY(mutex_);
int last_num_simulcast_streams_ RTC_GUARDED_BY(mutex_);
std::array<bool, kMaxSpatialLayers> last_spatial_layer_use_
RTC_GUARDED_BY(mutex_);
// Indicates if the latest bitrate allocation had layers disabled by low
// available bandwidth.
bool bw_limited_layers_ RTC_GUARDED_BY(mutex_);
// Indicastes if the encoder internally downscales input image.
bool internal_encoder_scaler_ RTC_GUARDED_BY(mutex_);
Adaptations adaptation_limitations_ RTC_GUARDED_BY(mutex_);
struct EncoderChangeEvent {
std::string previous_encoder_implementation;
std::string new_encoder_implementation;
};
// Stores the last change in encoder implementation in an optional, so that
// the event can be consumed.
absl::optional<EncoderChangeEvent> encoder_changed_;
// Contains stats used for UMA histograms. These stats will be reset if
// content type changes between real-time video and screenshare, since these
// will be reported separately.
struct UmaSamplesContainer {
UmaSamplesContainer(const char* prefix,
const VideoSendStream::Stats& start_stats,
Clock* clock);
~UmaSamplesContainer();
void UpdateHistograms(const RtpConfig& rtp_config,
const VideoSendStream::Stats& current_stats);
void InitializeBitrateCounters(const VideoSendStream::Stats& stats);
bool InsertEncodedFrame(const EncodedImage& encoded_frame,
int simulcast_idx);
void RemoveOld(int64_t now_ms);
const std::string uma_prefix_;
Clock* const clock_;
SampleCounter input_width_counter_;
SampleCounter input_height_counter_;
SampleCounter sent_width_counter_;
SampleCounter sent_height_counter_;
SampleCounter encode_time_counter_;
BoolSampleCounter key_frame_counter_;
BoolSampleCounter quality_limited_frame_counter_;
SampleCounter quality_downscales_counter_;
BoolSampleCounter cpu_limited_frame_counter_;
BoolSampleCounter bw_limited_frame_counter_;
SampleCounter bw_resolutions_disabled_counter_;
SampleCounter delay_counter_;
SampleCounter max_delay_counter_;
rtc::RateTracker input_frame_rate_tracker_;
RateCounter input_fps_counter_;
RateCounter sent_fps_counter_;
RateAccCounter total_byte_counter_;
RateAccCounter media_byte_counter_;
RateAccCounter rtx_byte_counter_;
RateAccCounter padding_byte_counter_;
RateAccCounter retransmit_byte_counter_;
RateAccCounter fec_byte_counter_;
int64_t first_rtcp_stats_time_ms_;
int64_t first_rtp_stats_time_ms_;
StatsTimer cpu_adapt_timer_;
StatsTimer quality_adapt_timer_;
BoolSampleCounter paused_time_counter_;
TargetRateUpdates target_rate_updates_;
BoolSampleCounter fallback_active_counter_;
FallbackEncoderInfo fallback_info_;
FallbackEncoderInfoDisabled fallback_info_disabled_;
ReportBlockStats report_block_stats_;
const VideoSendStream::Stats start_stats_;
size_t num_streams_; // Number of configured streams to encoder.
size_t num_pixels_highest_stream_;
EncodedFrameMap encoded_frames_;
AdaptChanges initial_quality_changes_;
std::map<int, QpCounters>
qp_counters_; // QP counters mapped by spatial idx.
};
std::unique_ptr<UmaSamplesContainer> uma_container_ RTC_GUARDED_BY(mutex_);
};
} // namespace webrtc
#endif // VIDEO_SEND_STATISTICS_PROXY_H_