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/*
* Copyright (c) 2012 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 WEBRTC_VIDEO_VIE_REMB_H_
#define WEBRTC_VIDEO_VIE_REMB_H_
#include <list>
#include <utility>
#include <vector>
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/include/module.h"
#include "webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
namespace webrtc {
class CriticalSectionWrapper;
class ProcessThread;
class RtpRtcp;
class VieRemb : public RemoteBitrateObserver {
public:
explicit VieRemb(Clock* clock);
~VieRemb();
// Called to add a receive channel to include in the REMB packet.
void AddReceiveChannel(RtpRtcp* rtp_rtcp);
// Removes the specified channel from REMB estimate.
void RemoveReceiveChannel(RtpRtcp* rtp_rtcp);
// Called to add a module that can generate and send REMB RTCP.
void AddRembSender(RtpRtcp* rtp_rtcp);
// Removes a REMB RTCP sender.
void RemoveRembSender(RtpRtcp* rtp_rtcp);
// Returns true if the instance is in use, false otherwise.
bool InUse() const;
// Called every time there is a new bitrate estimate for a receive channel
// group. This call will trigger a new RTCP REMB packet if the bitrate
// estimate has decreased or if no RTCP REMB packet has been sent for
// a certain time interval.
// Implements RtpReceiveBitrateUpdate.
virtual void OnReceiveBitrateChanged(const std::vector<unsigned int>& ssrcs,
unsigned int bitrate);
private:
typedef std::list<RtpRtcp*> RtpModules;
Clock* const clock_;
rtc::scoped_ptr<CriticalSectionWrapper> list_crit_;
// The last time a REMB was sent.
int64_t last_remb_time_;
unsigned int last_send_bitrate_;
// All RtpRtcp modules to include in the REMB packet.
RtpModules receive_modules_;
// All modules that can send REMB RTCP.
RtpModules rtcp_sender_;
// The last bitrate update.
unsigned int bitrate_;
};
} // namespace webrtc
#endif // WEBRTC_VIDEO_VIE_REMB_H_
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