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Rename InterFrameDelay -> InterFrameDelayVariationCalculator.

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This class name better reflects the nomenclature defined by RFC5481: https://datatracker.ietf.org/doc/html/rfc5481#section-1.

Some code style improvements were performed. No functional changes are intended.

Bug: webrtc:14905
Change-Id: I84b9deb7b2ac7f1a07ae00670eaff9656a50c2cc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/295661
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39466}
This commit is contained in:
Rasmus Brandt 2023-03-03 09:22:18 +01:00 committed by WebRTC LUCI CQ
parent ca6481d37f
commit 65a6ecab33
11 changed files with 131 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
modules/video_coding/BUILD.gn
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@ -265,7 +265,7 @@ rtc_library("video_coding") {
"../rtp_rtcp:rtp_video_header",
"codecs/av1:av1_svc_config",
"svc:scalability_mode_util",
"timing:inter_frame_delay",
"timing:inter_frame_delay_variation_calculator",
"timing:jitter_estimator",
"timing:rtt_filter",
"timing:timing_module",
@ -358,7 +358,7 @@ rtc_library("video_coding_legacy") {
"../rtp_rtcp:rtp_rtcp_format",
"../rtp_rtcp:rtp_video_header",
"deprecated:deprecated_packet",
"timing:inter_frame_delay",
"timing:inter_frame_delay_variation_calculator",
"timing:jitter_estimator",
"timing:timing_module",
]

4
modules/video_coding/jitter_buffer.cc
View File

@ -19,7 +19,7 @@
#include "modules/video_coding/include/video_coding.h"
#include "modules/video_coding/internal_defines.h"
#include "modules/video_coding/jitter_buffer_common.h"
#include "modules/video_coding/timing/inter_frame_delay.h"
#include "modules/video_coding/timing/inter_frame_delay_variation_calculator.h"
#include "modules/video_coding/timing/jitter_estimator.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
@ -873,7 +873,7 @@ void VCMJitterBuffer::UpdateJitterEstimate(int64_t latest_packet_time_ms,
if (latest_packet_time_ms == -1) {
return;
}
auto frame_delay = inter_frame_delay_.CalculateDelay(
auto frame_delay = inter_frame_delay_.Calculate(
timestamp, Timestamp::Millis(latest_packet_time_ms));
bool not_reordered = frame_delay.has_value();

4
modules/video_coding/jitter_buffer.h
View File

@ -25,7 +25,7 @@
#include "modules/video_coding/include/video_coding.h"
#include "modules/video_coding/include/video_coding_defines.h"
#include "modules/video_coding/jitter_buffer_common.h"
#include "modules/video_coding/timing/inter_frame_delay.h"
#include "modules/video_coding/timing/inter_frame_delay_variation_calculator.h"
#include "modules/video_coding/timing/jitter_estimator.h"
#include "rtc_base/synchronization/mutex.h"
#include "rtc_base/thread_annotations.h"
@ -254,7 +254,7 @@ class VCMJitterBuffer {
// Filter for estimating jitter.
JitterEstimator jitter_estimate_;
// Calculates network delays used for jitter calculations.
InterFrameDelay inter_frame_delay_;
InterFrameDelayVariationCalculator inter_frame_delay_;
VCMJitterSample waiting_for_completion_;
// Holds the internal NACK list (the missing sequence numbers).

10
modules/video_coding/timing/BUILD.gn
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@ -16,10 +16,10 @@ rtc_library("decode_time_percentile_filter") {
deps = [ "../../../rtc_base:rtc_numerics" ]
}
rtc_library("inter_frame_delay") {
rtc_library("inter_frame_delay_variation_calculator") {
sources = [
"inter_frame_delay.cc",
"inter_frame_delay.h",
"inter_frame_delay_variation_calculator.cc",
"inter_frame_delay_variation_calculator.h",
]
deps = [
"../..:module_api_public",
@ -124,7 +124,7 @@ rtc_library("timing_unittests") {
testonly = true
sources = [
"frame_delay_variation_kalman_filter_unittest.cc",
"inter_frame_delay_unittest.cc",
"inter_frame_delay_variation_calculator_unittest.cc",
"jitter_estimator_unittest.cc",
"rtt_filter_unittest.cc",
"timestamp_extrapolator_unittest.cc",
@ -132,7 +132,7 @@ rtc_library("timing_unittests") {
]
deps = [
":frame_delay_variation_kalman_filter",
":inter_frame_delay",
":inter_frame_delay_variation_calculator",
":jitter_estimator",
":rtt_filter",
":timestamp_extrapolator",

46
modules/video_coding/timing/inter_frame_delay.h
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@ -1,46 +0,0 @@
/*
* Copyright (c) 2011 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 MODULES_VIDEO_CODING_TIMING_INTER_FRAME_DELAY_H_
#define MODULES_VIDEO_CODING_TIMING_INTER_FRAME_DELAY_H_
#include <stdint.h>
#include "absl/types/optional.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "rtc_base/numerics/sequence_number_unwrapper.h"
namespace webrtc {
class InterFrameDelay {
public:
InterFrameDelay();
// Resets the estimate. Zeros are given as parameters.
void Reset();
// Calculates the delay of a frame with the given timestamp.
// This method is called when the frame is complete.
absl::optional<TimeDelta> CalculateDelay(uint32_t rtp_timestamp,
Timestamp now);
private:
// The previous rtp timestamp passed to the delay estimate
int64_t prev_rtp_timestamp_unwrapped_;
RtpTimestampUnwrapper unwrapper_;
// The previous wall clock timestamp used by the delay estimate
absl::optional<Timestamp> prev_wall_clock_;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_TIMING_INTER_FRAME_DELAY_H_

36
modules/video_coding/timing/inter_frame_delay.cc → modules/video_coding/timing/inter_frame_delay_variation_calculator.cc
View File

@ -8,7 +8,7 @@
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/video_coding/timing/inter_frame_delay.h"
#include "modules/video_coding/timing/inter_frame_delay_variation_calculator.h"
#include "absl/types/optional.h"
#include "api/units/frequency.h"
@ -21,51 +21,51 @@ namespace {
constexpr Frequency k90kHz = Frequency::KiloHertz(90);
}
InterFrameDelay::InterFrameDelay() {
InterFrameDelayVariationCalculator::InterFrameDelayVariationCalculator() {
Reset();
}
// Resets the delay estimate.
void InterFrameDelay::Reset() {
void InterFrameDelayVariationCalculator::Reset() {
prev_wall_clock_ = absl::nullopt;
prev_rtp_timestamp_unwrapped_ = 0;
}
// Calculates the delay of a frame with the given timestamp.
// This method is called when the frame is complete.
absl::optional<TimeDelta> InterFrameDelay::CalculateDelay(
absl::optional<TimeDelta> InterFrameDelayVariationCalculator::Calculate(
uint32_t rtp_timestamp,
Timestamp now) {
int64_t rtp_timestamp_unwrapped = unwrapper_.Unwrap(rtp_timestamp);
if (!prev_wall_clock_) {
// First set of data, initialization, wait for next frame.
prev_wall_clock_ = now;
prev_rtp_timestamp_unwrapped_ = rtp_timestamp_unwrapped;
// Inter-frame delay variation is undefined for a single frame.
// TODO(brandtr): Should this return absl::nullopt instead?
return TimeDelta::Zero();
}
// Account for reordering in jitter variance estimate in the future?
// Note that this also captures incomplete frames which are grabbed for
// decoding after a later frame has been complete, i.e. real packet losses.
uint32_t cropped_last = static_cast<uint32_t>(prev_rtp_timestamp_unwrapped_);
uint32_t cropped_prev = static_cast<uint32_t>(prev_rtp_timestamp_unwrapped_);
if (rtp_timestamp_unwrapped < prev_rtp_timestamp_unwrapped_ ||
!IsNewerTimestamp(rtp_timestamp, cropped_last)) {
!IsNewerTimestamp(rtp_timestamp, cropped_prev)) {
return absl::nullopt;
}
// Compute the compensated timestamp difference.
TimeDelta delta_wall = now - *prev_wall_clock_;
int64_t d_rtp_ticks = rtp_timestamp_unwrapped - prev_rtp_timestamp_unwrapped_;
TimeDelta dts = d_rtp_ticks / k90kHz;
TimeDelta dt = now - *prev_wall_clock_;
TimeDelta delta_rtp = d_rtp_ticks / k90kHz;
// frameDelay is the difference of dT and dTS -- i.e. the difference of the
// wall clock time difference and the timestamp difference between two
// following frames.
TimeDelta delay = dt - dts;
// The inter-frame delay variation is the second order difference between the
// RTP and wall clocks of the two frames, or in other words, the first order
// difference between `delta_rtp` and `delta_wall`.
TimeDelta inter_frame_delay_variation = delta_wall - delta_rtp;
prev_rtp_timestamp_unwrapped_ = rtp_timestamp_unwrapped;
prev_wall_clock_ = now;
return delay;
prev_rtp_timestamp_unwrapped_ = rtp_timestamp_unwrapped;
return inter_frame_delay_variation;
}
} // namespace webrtc

48
modules/video_coding/timing/inter_frame_delay_variation_calculator.h Normal file
View File

@ -0,0 +1,48 @@
/*
* Copyright (c) 2011 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 MODULES_VIDEO_CODING_TIMING_INTER_FRAME_DELAY_VARIATION_CALCULATOR_H_
#define MODULES_VIDEO_CODING_TIMING_INTER_FRAME_DELAY_VARIATION_CALCULATOR_H_
#include <stdint.h>
#include "absl/types/optional.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "rtc_base/numerics/sequence_number_unwrapper.h"
namespace webrtc {
// This class calculates the inter-frame delay variation (see RFC5481) between
// the current frame (as supplied through the current call to `Calculate`) and
// the previous frame (as supplied through the previous call to `Calculate`).
class InterFrameDelayVariationCalculator {
public:
InterFrameDelayVariationCalculator();
// Resets the calculator.
void Reset();
// Calculates the inter-frame delay variation of a frame with the given
// RTP timestamp. This method is called when the frame is complete.
absl::optional<TimeDelta> Calculate(uint32_t rtp_timestamp, Timestamp now);
private:
// The previous wall clock timestamp used in the calculation.
absl::optional<Timestamp> prev_wall_clock_;
// The previous RTP timestamp used in the calculation.
int64_t prev_rtp_timestamp_unwrapped_;
RtpTimestampUnwrapper unwrapper_;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_TIMING_INTER_FRAME_DELAY_VARIATION_CALCULATOR_H_

82
modules/video_coding/timing/inter_frame_delay_unittest.cc → modules/video_coding/timing/inter_frame_delay_variation_calculator_unittest.cc
View File

@ -8,7 +8,7 @@
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/video_coding/timing/inter_frame_delay.h"
#include "modules/video_coding/timing/inter_frame_delay_variation_calculator.h"
#include <limits>
@ -36,76 +36,75 @@ constexpr Timestamp kStartTime = Timestamp::Millis(1337);
using ::testing::Eq;
using ::testing::Optional;
TEST(InterFrameDelayTest, OldRtpTimestamp) {
InterFrameDelay inter_frame_delay;
EXPECT_THAT(inter_frame_delay.CalculateDelay(180000, kStartTime),
TEST(InterFrameDelayVariationCalculatorTest, OldRtpTimestamp) {
InterFrameDelayVariationCalculator ifdv_calculator;
EXPECT_THAT(ifdv_calculator.Calculate(180000, kStartTime),
Optional(TimeDelta::Zero()));
EXPECT_THAT(inter_frame_delay.CalculateDelay(90000, kStartTime),
Eq(absl::nullopt));
EXPECT_THAT(ifdv_calculator.Calculate(90000, kStartTime), Eq(absl::nullopt));
}
TEST(InterFrameDelayTest, NegativeWrapAroundIsSameAsOldRtpTimestamp) {
InterFrameDelay inter_frame_delay;
TEST(InterFrameDelayVariationCalculatorTest,
NegativeWrapAroundIsSameAsOldRtpTimestamp) {
InterFrameDelayVariationCalculator ifdv_calculator;
uint32_t rtp = 1500;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, kStartTime),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, kStartTime),
Optional(TimeDelta::Zero()));
// RTP has wrapped around backwards.
rtp -= 3000;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, kStartTime),
Eq(absl::nullopt));
EXPECT_THAT(ifdv_calculator.Calculate(rtp, kStartTime), Eq(absl::nullopt));
}
TEST(InterFrameDelayTest, CorrectDelayForFrames) {
InterFrameDelay inter_frame_delay;
TEST(InterFrameDelayVariationCalculatorTest, CorrectDelayForFrames) {
InterFrameDelayVariationCalculator ifdv_calculator;
// Use a fake clock to simplify time keeping.
SimulatedClock clock(kStartTime);
// First frame is always delay 0.
// First frame is always delay variation 0.
uint32_t rtp = 90000;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// Perfectly timed frame has 0 delay.
// Perfectly timed frame has 0 delay variation.
clock.AdvanceTime(kFrameDelay);
rtp += kRtpTicksPerFrame;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// Slightly early frame will have a negative delay.
// Slightly early frame will have a negative delay variation.
clock.AdvanceTime(kFrameDelay - TimeDelta::Millis(3));
rtp += kRtpTicksPerFrame;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(-TimeDelta::Millis(3)));
// Slightly late frame will have positive delay.
// Slightly late frame will have positive delay variation.
clock.AdvanceTime(kFrameDelay + TimeDelta::Micros(5125));
rtp += kRtpTicksPerFrame;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Micros(5125)));
// Simulate faster frame RTP at the same clock delay. The frame arrives late,
// since the RTP timestamp is faster than the delay, and thus is positive.
clock.AdvanceTime(kFrameDelay);
rtp += kRtpTicksPerFrame / 2;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(kFrameDelay / 2.0));
// Simulate slower frame RTP at the same clock delay. The frame is early,
// since the RTP timestamp advanced more than the delay, and thus is negative.
clock.AdvanceTime(kFrameDelay);
rtp += 1.5 * kRtpTicksPerFrame;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(-kFrameDelay / 2.0));
}
TEST(InterFrameDelayTest, PositiveWrapAround) {
InterFrameDelay inter_frame_delay;
TEST(InterFrameDelayVariationCalculatorTest, PositiveWrapAround) {
InterFrameDelayVariationCalculator ifdv_calculator;
// Use a fake clock to simplify time keeping.
SimulatedClock clock(kStartTime);
// First frame is behind the max RTP by 1500.
uint32_t rtp = std::numeric_limits<uint32_t>::max() - 1500;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// Rtp wraps around, now 1499.
@ -113,77 +112,78 @@ TEST(InterFrameDelayTest, PositiveWrapAround) {
// Frame delay should be as normal, in this case simulated as 1ms late.
clock.AdvanceTime(kFrameDelay + TimeDelta::Millis(1));
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Millis(1)));
}
TEST(InterFrameDelayTest, MultipleWrapArounds) {
TEST(InterFrameDelayVariationCalculatorTest, MultipleWrapArounds) {
// Simulate a long pauses which cause wrap arounds multiple times.
constexpr Frequency k90Khz = Frequency::KiloHertz(90);
constexpr uint32_t kHalfRtp = std::numeric_limits<uint32_t>::max() / 2;
constexpr TimeDelta kWrapAroundDelay = kHalfRtp / k90Khz;
InterFrameDelay inter_frame_delay;
InterFrameDelayVariationCalculator ifdv_calculator;
// Use a fake clock to simplify time keeping.
SimulatedClock clock(kStartTime);
uint32_t rtp = 0;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
rtp += kHalfRtp;
clock.AdvanceTime(kWrapAroundDelay);
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// 1st wrap around.
rtp += kHalfRtp + 1;
clock.AdvanceTime(kWrapAroundDelay + TimeDelta::Millis(1));
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Millis(1) - (1 / k90Khz)));
rtp += kHalfRtp;
clock.AdvanceTime(kWrapAroundDelay);
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// 2nd wrap arounds.
rtp += kHalfRtp + 1;
clock.AdvanceTime(kWrapAroundDelay - TimeDelta::Millis(1));
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(-TimeDelta::Millis(1) - (1 / k90Khz)));
// Ensure short delay (large RTP delay) between wrap-arounds has correct
// jitter.
rtp += kHalfRtp;
clock.AdvanceTime(TimeDelta::Millis(10));
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(-(kWrapAroundDelay - TimeDelta::Millis(10))));
// 3nd wrap arounds, this time with large RTP delay.
rtp += kHalfRtp + 1;
clock.AdvanceTime(TimeDelta::Millis(10));
EXPECT_THAT(
inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(-(kWrapAroundDelay - TimeDelta::Millis(10) + (1 / k90Khz))));
}
TEST(InterFrameDelayTest, NegativeWrapAroundAfterPositiveWrapAround) {
InterFrameDelay inter_frame_delay;
TEST(InterFrameDelayVariationCalculatorTest,
NegativeWrapAroundAfterPositiveWrapAround) {
InterFrameDelayVariationCalculator ifdv_calculator;
// Use a fake clock to simplify time keeping.
SimulatedClock clock(kStartTime);
uint32_t rtp = std::numeric_limits<uint32_t>::max() - 1500;
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// Rtp wraps around, now 1499.
rtp += kRtpTicksPerFrame;
// Frame delay should be as normal, in this case simulated as 1ms late.
clock.AdvanceTime(kFrameDelay);
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Optional(TimeDelta::Zero()));
// Wrap back.
rtp -= kRtpTicksPerFrame;
// Frame delay should be as normal, in this case simulated as 1ms late.
clock.AdvanceTime(kFrameDelay);
EXPECT_THAT(inter_frame_delay.CalculateDelay(rtp, clock.CurrentTime()),
EXPECT_THAT(ifdv_calculator.Calculate(rtp, clock.CurrentTime()),
Eq(absl::nullopt));
}

3
video/BUILD.gn
View File

@ -247,13 +247,14 @@ rtc_library("video_stream_buffer_controller") {
"../api/metronome",
"../api/task_queue",
"../api/units:data_size",
"../api/units:time_delta",
"../api/video:encoded_frame",
"../api/video:frame_buffer",
"../api/video:video_rtp_headers",
"../modules/video_coding",
"../modules/video_coding:frame_helpers",
"../modules/video_coding:video_codec_interface",
"../modules/video_coding/timing:inter_frame_delay",
"../modules/video_coding/timing:inter_frame_delay_variation_calculator",
"../modules/video_coding/timing:jitter_estimator",
"../modules/video_coding/timing:timing_module",
"../rtc_base:checks",

13
video/video_stream_buffer_controller.cc
View File

@ -16,14 +16,16 @@
#include "absl/base/attributes.h"
#include "absl/functional/bind_front.h"
#include "absl/types/optional.h"
#include "api/sequence_checker.h"
#include "api/task_queue/task_queue_base.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/video/encoded_frame.h"
#include "api/video/frame_buffer.h"
#include "api/video/video_content_type.h"
#include "modules/video_coding/frame_helpers.h"
#include "modules/video_coding/timing/inter_frame_delay.h"
#include "modules/video_coding/timing/inter_frame_delay_variation_calculator.h"
#include "modules/video_coding/timing/jitter_estimator.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
@ -225,10 +227,11 @@ void VideoStreamBufferController::OnFrameReady(
}
if (!superframe_delayed_by_retransmission) {
auto frame_delay = inter_frame_delay_.CalculateDelay(
first_frame.Timestamp(), receive_time);
if (frame_delay) {
jitter_estimator_.UpdateEstimate(*frame_delay, superframe_size);
absl::optional<TimeDelta> inter_frame_delay_variation =
ifdv_calculator_.Calculate(first_frame.Timestamp(), receive_time);
if (inter_frame_delay_variation) {
jitter_estimator_.UpdateEstimate(*inter_frame_delay_variation,
superframe_size);
}
float rtt_mult = protection_mode_ == kProtectionNackFEC ? 0.0 : 1.0;

5
video/video_stream_buffer_controller.h
View File

@ -18,7 +18,7 @@
#include "api/video/encoded_frame.h"
#include "api/video/frame_buffer.h"
#include "modules/video_coding/include/video_coding_defines.h"
#include "modules/video_coding/timing/inter_frame_delay.h"
#include "modules/video_coding/timing/inter_frame_delay_variation_calculator.h"
#include "modules/video_coding/timing/jitter_estimator.h"
#include "modules/video_coding/timing/timing.h"
#include "rtc_base/experiments/rtt_mult_experiment.h"
@ -85,7 +85,8 @@ class VideoStreamBufferController {
RTC_GUARDED_BY(&worker_sequence_checker_);
JitterEstimator jitter_estimator_ RTC_GUARDED_BY(&worker_sequence_checker_);
InterFrameDelay inter_frame_delay_ RTC_GUARDED_BY(&worker_sequence_checker_);
InterFrameDelayVariationCalculator ifdv_calculator_
RTC_GUARDED_BY(&worker_sequence_checker_);
bool keyframe_required_ RTC_GUARDED_BY(&worker_sequence_checker_) = false;
std::unique_ptr<FrameBuffer> buffer_
RTC_GUARDED_BY(&worker_sequence_checker_);