chromium/third_party/webrtc/video/encoder_bitrate_adjuster.cc

/*
 *  Copyright (c) 2019 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 "video/encoder_bitrate_adjuster.h"

#include <algorithm>
#include <memory>
#include <vector>

#include "api/field_trials_view.h"
#include "modules/video_coding/svc/scalability_mode_util.h"
#include "rtc_base/experiments/rate_control_settings.h"
#include "rtc_base/logging.h"
#include "rtc_base/time_utils.h"

namespace webrtc {
namespace {
// Helper struct with metadata for a single spatial layer.
struct LayerRateInfo { … };
}  // namespace
constexpr TimeDelta EncoderBitrateAdjuster::kWindowSize;
constexpr size_t EncoderBitrateAdjuster::kMinFramesSinceLayoutChange;
constexpr double EncoderBitrateAdjuster::kDefaultUtilizationFactor;

EncoderBitrateAdjuster::EncoderBitrateAdjuster(
    const VideoCodec& codec_settings,
    const FieldTrialsView& field_trials,
    Clock& clock)
    : … { … }

EncoderBitrateAdjuster::~EncoderBitrateAdjuster() = default;

VideoBitrateAllocation EncoderBitrateAdjuster::AdjustRateAllocation(
    const VideoEncoder::RateControlParameters& rates) { … }

void EncoderBitrateAdjuster::OnEncoderInfo(
    const VideoEncoder::EncoderInfo& encoder_info) { … }

void EncoderBitrateAdjuster::OnEncodedFrame(DataSize size,
                                            int stream_index,
                                            int temporal_index) { … }

void EncoderBitrateAdjuster::Reset() { … }

}  // namespace webrtc