Move BWE period calculation from ProbingIntervalEstimator to AimdRateControl.

webrtc/modules/congestion_controller/probing_interval_estimator.cc

-/*
- *  Copyright (c) 2016 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 "webrtc/modules/congestion_controller/probing_interval_estimator.h"
-
-#include <algorithm>
-#include <utility>
-
-namespace webrtc {
-
-namespace {
-constexpr int kMinIntervalMs = 2000;
-constexpr int kDefaultIntervalMs = 3000;
-constexpr int kMaxIntervalMs = 50000;
-}
-
-ProbingIntervalEstimator::ProbingIntervalEstimator(
-    const AimdRateControl* aimd_rate_control)
-    : ProbingIntervalEstimator(kMinIntervalMs,
-                               kMaxIntervalMs,
-                               kDefaultIntervalMs,
-                               aimd_rate_control) {}
-
-ProbingIntervalEstimator::ProbingIntervalEstimator(
-    int64_t min_interval_ms,
-    int64_t max_interval_ms,
-    int64_t default_interval_ms,
-    const AimdRateControl* aimd_rate_control)
-    : min_interval_ms_(min_interval_ms),
-      max_interval_ms_(max_interval_ms),
-      default_interval_ms_(default_interval_ms),
-      aimd_rate_control_(aimd_rate_control) {}
-
-int64_t ProbingIntervalEstimator::GetIntervalMs() const {
-  rtc::Optional<int> bitrate_drop =
-      aimd_rate_control_->GetLastBitrateDecreaseBps();
-  int increase_rate = aimd_rate_control_->GetNearMaxIncreaseRateBps();
-
-  if (!bitrate_drop || increase_rate <= 0)
-    return default_interval_ms_;
-
-  return std::min(
-      max_interval_ms_,
-      std::max(static_cast<int64_t>(1000 * (*bitrate_drop) / increase_rate),
-               min_interval_ms_));
-}
-
-}  // namespace webrtc