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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.
#include <stdint.h>
#include <set>
#include <vector>
#include "absl/types/optional.h"
#include "api/video/video_codec_type.h"
#include "api/video/video_content_type.h"
#include "rtc_base/numerics/moving_average.h"
#include "rtc_base/numerics/sample_counter.h"
namespace webrtc {
namespace internal {
// Declared in video_receive_stream2.h.
struct VideoFrameMetaData;
// Calculates spatial and temporal quality metrics and reports them to UMA
// stats.
class VideoQualityObserver {
// Use either VideoQualityObserver::kBlockyQpThresholdVp8 or
// VideoQualityObserver::kBlockyQpThresholdVp9.
~VideoQualityObserver() = default;
void OnDecodedFrame(uint32_t rtp_frame_timestamp,
absl::optional<uint8_t> qp,
VideoCodecType codec);
void OnRenderedFrame(const VideoFrameMetaData& frame_meta);
void OnStreamInactive();
uint32_t NumFreezes() const;
uint32_t NumPauses() const;
uint32_t TotalFreezesDurationMs() const;
uint32_t TotalPausesDurationMs() const;
uint32_t TotalFramesDurationMs() const;
double SumSquaredFrameDurationsSec() const;
// Set |screenshare| to true if the last decoded frame was for screenshare.
void UpdateHistograms(bool screenshare);
static const uint32_t kMinFrameSamplesToDetectFreeze;
static const uint32_t kMinIncreaseForFreezeMs;
static const uint32_t kAvgInterframeDelaysWindowSizeFrames;
enum Resolution {
Low = 0,
Medium = 1,
High = 2,
int64_t last_frame_rendered_ms_;
int64_t num_frames_rendered_;
int64_t first_frame_rendered_ms_;
int64_t last_frame_pixels_;
bool is_last_frame_blocky_;
// Decoded timestamp of the last delayed frame.
int64_t last_unfreeze_time_ms_;
rtc::MovingAverage render_interframe_delays_;
double sum_squared_interframe_delays_secs_;
// An inter-frame delay is counted as a freeze if it's significantly longer
// than average inter-frame delay.
rtc::SampleCounter freezes_durations_;
rtc::SampleCounter pauses_durations_;
// Time between freezes.
rtc::SampleCounter smooth_playback_durations_;
// Counters for time spent in different resolutions. Time between each two
// Consecutive frames is counted to bin corresponding to the first frame
// resolution.
std::vector<int64_t> time_in_resolution_ms_;
// Resolution of the last decoded frame. Resolution enum is used as an index.
Resolution current_resolution_;
int num_resolution_downgrades_;
// Similar to resolution, time spent in high-QP video.
int64_t time_in_blocky_video_ms_;
bool is_paused_;
// Set of decoded frames with high QP value.
std::set<int64_t> blocky_frames_;
} // namespace internal
} // namespace webrtc