b56d0e383e
Changing to using strategy classes rather than having two different derived classes of BitrateControllerImpl. This enables run-time switching of the strategy, which is now possible through a new API. The reason is that it must fit the current design of ViE. BUG=2436 R=stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/2789004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5028 4adac7df-926f-26a2-2b94-8c16560cd09d
102 lines
3.7 KiB
C++
102 lines
3.7 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*
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* Usage: this class will register multiple RtcpBitrateObserver's one at each
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* RTCP module. It will aggregate the results and run one bandwidth estimation
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* and push the result to the encoder via VideoEncoderCallback.
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*/
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#ifndef WEBRTC_MODULES_BITRATE_CONTROLLER_BITRATE_CONTROLLER_IMPL_H_
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#define WEBRTC_MODULES_BITRATE_CONTROLLER_BITRATE_CONTROLLER_IMPL_H_
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#include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
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#include <list>
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#include <map>
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#include <utility>
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#include "webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.h"
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#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
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#include "webrtc/system_wrappers/interface/scoped_ptr.h"
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namespace webrtc {
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class RtcpBandwidthObserverImpl;
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class LowRateStrategy;
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class BitrateControllerImpl : public BitrateController {
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public:
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friend class RtcpBandwidthObserverImpl;
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struct BitrateConfiguration {
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BitrateConfiguration(uint32_t start_bitrate,
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uint32_t min_bitrate,
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uint32_t max_bitrate)
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: start_bitrate_(start_bitrate),
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min_bitrate_(min_bitrate),
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max_bitrate_(max_bitrate) {
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}
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uint32_t start_bitrate_;
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uint32_t min_bitrate_;
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uint32_t max_bitrate_;
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};
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struct ObserverConfiguration {
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ObserverConfiguration(BitrateObserver* observer,
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uint32_t bitrate)
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: observer_(observer),
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min_bitrate_(bitrate) {
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}
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BitrateObserver* observer_;
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uint32_t min_bitrate_;
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};
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typedef std::pair<BitrateObserver*, BitrateConfiguration*>
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BitrateObserverConfiguration;
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typedef std::list<BitrateObserverConfiguration> BitrateObserverConfList;
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explicit BitrateControllerImpl(bool enforce_min_bitrate);
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virtual ~BitrateControllerImpl();
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virtual bool AvailableBandwidth(uint32_t* bandwidth) const OVERRIDE;
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virtual RtcpBandwidthObserver* CreateRtcpBandwidthObserver() OVERRIDE;
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virtual void SetBitrateObserver(BitrateObserver* observer,
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const uint32_t start_bitrate,
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const uint32_t min_bitrate,
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const uint32_t max_bitrate) OVERRIDE;
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virtual void RemoveBitrateObserver(BitrateObserver* observer) OVERRIDE;
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virtual void EnforceMinBitrate(bool enforce_min_bitrate) OVERRIDE;
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private:
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// Called by BitrateObserver's direct from the RTCP module.
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void OnReceivedEstimatedBitrate(const uint32_t bitrate);
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void OnReceivedRtcpReceiverReport(const uint8_t fraction_loss,
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const uint32_t rtt,
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const int number_of_packets,
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const uint32_t now_ms);
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typedef std::multimap<uint32_t, ObserverConfiguration*> ObserverSortingMap;
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BitrateObserverConfList::iterator
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FindObserverConfigurationPair(const BitrateObserver* observer);
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void OnNetworkChanged(const uint32_t bitrate,
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const uint8_t fraction_loss, // 0 - 255.
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const uint32_t rtt);
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CriticalSectionWrapper* critsect_;
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SendSideBandwidthEstimation bandwidth_estimation_;
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BitrateObserverConfList bitrate_observers_;
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scoped_ptr<LowRateStrategy> low_rate_strategy_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_BITRATE_CONTROLLER_BITRATE_CONTROLLER_IMPL_H_
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