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/*
* 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 WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_REMB_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_REMB_H_
#include <vector>
#include "webrtc/base/basictypes.h"
#include "webrtc/base/constructormagic.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/psfb.h"
namespace webrtc {
namespace rtcp {
class CommonHeader;
// Receiver Estimated Max Bitrate (REMB) (draft-alvestrand-rmcat-remb).
class Remb : public Psfb {
public:
static constexpr uint8_t kFeedbackMessageType = 15;
static constexpr size_t kMaxNumberOfSsrcs = 0xff;
Remb() : bitrate_bps_(0) {}
~Remb() override {}
// Parse assumes header is already parsed and validated.
bool Parse(const CommonHeader& packet);
bool SetSsrcs(std::vector<uint32_t> ssrcs);
void SetBitrateBps(uint64_t bitrate_bps) { bitrate_bps_ = bitrate_bps; }
uint64_t bitrate_bps() const { return bitrate_bps_; }
const std::vector<uint32_t>& ssrcs() const { return ssrcs_; }
protected:
bool Create(uint8_t* packet,
size_t* index,
size_t max_length,
RtcpPacket::PacketReadyCallback* callback) const override;
size_t BlockLength() const override {
return kHeaderLength + kCommonFeedbackLength + (2 + ssrcs_.size()) * 4;
}
private:
static constexpr uint32_t kUniqueIdentifier = 0x52454D42; // 'R' 'E' 'M' 'B'.
// Media ssrc is unused, shadow base class setter and getter.
void SetMediaSsrc(uint32_t);
uint32_t media_ssrc() const;
uint64_t bitrate_bps_;
std::vector<uint32_t> ssrcs_;
RTC_DISALLOW_COPY_AND_ASSIGN(Remb);
};
} // namespace rtcp
} // namespace webrtc
#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_REMB_H_