59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
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/*
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* Copyright (c) 2018 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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#ifndef MODULES_RTP_RTCP_SOURCE_MID_ORACLE_H_
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#define MODULES_RTP_RTCP_SOURCE_MID_ORACLE_H_
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#include <stdint.h>
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#include <string>
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#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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// The MidOracle instructs an RTPSender to send the MID header extension on a
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// new SSRC stream until it receives an RTCP report block for that stream (which
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// implies that the remote side is able to demultiplex it and can remember the
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// MID --> SSRC mapping).
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class MidOracle {
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public:
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explicit MidOracle(const std::string& mid);
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~MidOracle();
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// MID value to put into the header extension.
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const std::string& mid() const { return mid_; }
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// True if the MID header extension should be included on the next outgoing
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// packet.
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bool send_mid() const { return send_mid_; }
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// Change the RTP stream SSRC. This will cause MIDs to be included until an
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// RTCP report block lists this SSRC as received.
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void SetSsrc(uint32_t ssrc) {
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ssrc_ = ssrc;
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send_mid_ = true;
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}
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// Feedback to decide when to stop sending the MID header extension.
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void OnReceivedRtcpReportBlocks(const ReportBlockList& report_blocks);
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private:
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const std::string mid_;
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bool send_mid_ = false;
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uint32_t ssrc_ = 0;
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RTC_DISALLOW_COPY_AND_ASSIGN(MidOracle);
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};
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} // namespace webrtc
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#endif // MODULES_RTP_RTCP_SOURCE_MID_ORACLE_H_
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