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2e10b8e4a0
BUG=1662 R=tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/1787004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4349 4adac7df-926f-26a2-2b94-8c16560cd09d
70 lines
2.7 KiB
C++
70 lines
2.7 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 encoders via BitrateObserver(s).
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*/
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#ifndef WEBRTC_MODULES_BITRATE_CONTROLLER_INCLUDE_BITRATE_CONTROLLER_H_
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#define WEBRTC_MODULES_BITRATE_CONTROLLER_INCLUDE_BITRATE_CONTROLLER_H_
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#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
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namespace webrtc {
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class BitrateObserver {
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/*
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* Observer class for the encoders, each encoder should implement this class
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* to get the target bitrate. It also get the fraction loss and rtt to
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* optimize its settings for this type of network. |target_bitrate| is the
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* target media/payload bitrate excluding packet headers, measured in bits
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* per second.
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*/
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public:
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virtual void OnNetworkChanged(const uint32_t target_bitrate,
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const uint8_t fraction_loss, // 0 - 255.
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const uint32_t rtt) = 0;
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virtual ~BitrateObserver() {}
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};
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class BitrateController {
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/*
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* This class collects feedback from all streams sent to a peer (via
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* RTCPBandwidthObservers). It does one aggregated send side bandwidth
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* estimation and divide the available bitrate between all its registered
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* BitrateObservers.
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*/
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public:
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static BitrateController* CreateBitrateController();
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virtual ~BitrateController() {}
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virtual RtcpBandwidthObserver* CreateRtcpBandwidthObserver() = 0;
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// Gets the available payload bandwidth in bits per second. Note that
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// this bandwidth excludes packet headers.
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virtual bool AvailableBandwidth(uint32_t* bandwidth) const = 0;
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/*
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* Set the start and max send bitrate used by the bandwidth management.
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*
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* observer, updates bitrates if already in use.
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* min_bitrate_kbit = 0 equals no min bitrate.
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* max_bitrate_kit = 0 equals no max bitrate.
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*/
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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) = 0;
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virtual void RemoveBitrateObserver(BitrateObserver* observer) = 0;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_BITRATE_CONTROLLER_INCLUDE_BITRATE_CONTROLLER_H_
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