Reland "Moved congestion controller to goog_cc folder."
This is a reland of e6cefdf9c572cdce55ff0497ad6e516c76132ee8.
Original change's description:
> Moved congestion controller to goog_cc folder.
>
> Bug: webrtc:8415
> Change-Id: I2070da0cacf1dbfc4b6a89285af3e68fd03497ab
> Reviewed-on: https://webrtc-review.googlesource.com/43841
> Commit-Queue: Sebastian Jansson <srte@webrtc.org>
> Reviewed-by: Björn Terelius <terelius@webrtc.org>
> Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#21928}
Bug: webrtc:8415
Change-Id: Ib5cf8641466655d64ac80f720561817f4cab49a9
Reviewed-on: https://webrtc-review.googlesource.com/53062
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22244}diff --git a/modules/congestion_controller/goog_cc/probe_controller.h b/modules/congestion_controller/goog_cc/probe_controller.h
new file mode 100644
index 0000000..23fc4f7
--- /dev/null
+++ b/modules/congestion_controller/goog_cc/probe_controller.h
@@ -0,0 +1,100 @@
+/*
+ * 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.
+ */
+
+#ifndef MODULES_CONGESTION_CONTROLLER_GOOG_CC_PROBE_CONTROLLER_H_
+#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_PROBE_CONTROLLER_H_
+
+#include <stdint.h>
+
+#include <initializer_list>
+
+#include "api/optional.h"
+#include "modules/congestion_controller/network_control/include/network_control.h"
+
+namespace webrtc {
+
+class Clock;
+
+namespace webrtc_cc {
+
+// This class controls initiation of probing to estimate initial channel
+// capacity. There is also support for probing during a session when max
+// bitrate is adjusted by an application.
+class ProbeController {
+ public:
+ explicit ProbeController(NetworkControllerObserver* observer);
+ ~ProbeController();
+
+ void SetBitrates(int64_t min_bitrate_bps,
+ int64_t start_bitrate_bps,
+ int64_t max_bitrate_bps,
+ int64_t at_time_ms);
+
+ void OnNetworkAvailability(NetworkAvailability msg);
+
+ void SetEstimatedBitrate(int64_t bitrate_bps, int64_t at_time_ms);
+
+ void EnablePeriodicAlrProbing(bool enable);
+
+ void SetAlrStartTimeMs(rtc::Optional<int64_t> alr_start_time);
+ void SetAlrEndedTimeMs(int64_t alr_end_time);
+
+ void RequestProbe(int64_t at_time_ms);
+
+ // Resets the ProbeController to a state equivalent to as if it was just
+ // created EXCEPT for |enable_periodic_alr_probing_|.
+ void Reset(int64_t at_time_ms);
+
+ void Process(int64_t at_time_ms);
+
+ private:
+ enum class State {
+ // Initial state where no probing has been triggered yet.
+ kInit,
+ // Waiting for probing results to continue further probing.
+ kWaitingForProbingResult,
+ // Probing is complete.
+ kProbingComplete,
+ };
+
+ void InitiateExponentialProbing(int64_t at_time_ms);
+ void InitiateProbing(int64_t now_ms,
+ std::initializer_list<int64_t> bitrates_to_probe,
+ bool probe_further);
+
+ NetworkControllerObserver* const observer_;
+
+ bool network_available_;
+ State state_;
+ int64_t min_bitrate_to_probe_further_bps_;
+ int64_t time_last_probing_initiated_ms_;
+ int64_t estimated_bitrate_bps_;
+ int64_t start_bitrate_bps_;
+ int64_t max_bitrate_bps_;
+ int64_t last_bwe_drop_probing_time_ms_;
+ rtc::Optional<int64_t> alr_start_time_ms_;
+ rtc::Optional<int64_t> alr_end_time_ms_;
+ bool enable_periodic_alr_probing_;
+ int64_t time_of_last_large_drop_ms_;
+ int64_t bitrate_before_last_large_drop_bps_;
+
+ bool in_rapid_recovery_experiment_;
+ // For WebRTC.BWE.MidCallProbing.* metric.
+ bool mid_call_probing_waiting_for_result_;
+ int64_t mid_call_probing_bitrate_bps_;
+ int64_t mid_call_probing_succcess_threshold_;
+
+ RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(ProbeController);
+};
+
+} // namespace webrtc_cc
+} // namespace webrtc
+
+#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_PROBE_CONTROLLER_H_