chromium/media/gpu/frame_size_estimator.cc

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/gpu/frame_size_estimator.h"

#include <cmath>

#include "base/check.h"
#include "base/check_op.h"
#include "base/logging.h"
#include "media/gpu/h264_rate_control_util.h"

namespace media {
namespace {
void CalculateQSteps(uint32_t qp,
                     uint32_t qp_prev,
                     float& q_step,
                     float& q_step_prev,
                     float& delta_q_step_factor) { … }

}  // namespace

FrameSizeEstimator::FrameSizeEstimator(base::TimeDelta max_window_size,
                                       float initial_qp_size,
                                       float initial_size_correction)
    : … { … }

FrameSizeEstimator::~FrameSizeEstimator() = default;

size_t FrameSizeEstimator::Estimate(uint32_t qp, uint32_t qp_prev) const { … }

uint32_t FrameSizeEstimator::InverseEstimate(size_t target_frame_bytes,
                                             uint32_t qp_prev) const { … }

void FrameSizeEstimator::Update(size_t frame_bytes,
                                uint32_t qp,
                                uint32_t qp_prev,
                                base::TimeDelta elapsed_time) { … }

void FrameSizeEstimator::UpdateMaxWindowSize(base::TimeDelta max_window_size) { … }

}  // namespace media