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51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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/*
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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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#ifndef SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_
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#define SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_
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#include <list>
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#include "webrtc/typedefs.h"
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namespace webrtc {
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struct RtcpMeasurement {
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RtcpMeasurement();
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RtcpMeasurement(uint32_t ntp_secs, uint32_t ntp_frac, uint32_t timestamp);
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uint32_t ntp_secs;
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uint32_t ntp_frac;
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uint32_t rtp_timestamp;
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};
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typedef std::list<RtcpMeasurement> RtcpList;
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// Updates |rtcp_list| with timestamps from the latest RTCP SR.
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// |new_rtcp_sr| will be set to true if these are the timestamps which have
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// never be added to |rtcp_list|.
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bool UpdateRtcpList(uint32_t ntp_secs,
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uint32_t ntp_frac,
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uint32_t rtp_timestamp,
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RtcpList* rtcp_list,
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bool* new_rtcp_sr);
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// Converts an RTP timestamp to the NTP domain in milliseconds using two
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// (RTP timestamp, NTP timestamp) pairs.
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bool RtpToNtpMs(int64_t rtp_timestamp, const RtcpList& rtcp,
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int64_t* timestamp_in_ms);
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// Returns 1 there has been a forward wrap around, 0 if there has been no wrap
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// around and -1 if there has been a backwards wrap around (i.e. reordering).
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int CheckForWrapArounds(uint32_t rtp_timestamp, uint32_t rtcp_rtp_timestamp);
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} // namespace webrtc
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#endif // SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_
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