1/*
2 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_
12#define SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_
13
14#include <list>
15
16#include "webrtc/typedefs.h"
17
18namespace webrtc {
19
20struct RtcpMeasurement {
21  RtcpMeasurement();
22  RtcpMeasurement(uint32_t ntp_secs, uint32_t ntp_frac, uint32_t timestamp);
23  uint32_t ntp_secs;
24  uint32_t ntp_frac;
25  uint32_t rtp_timestamp;
26};
27
28typedef std::list<RtcpMeasurement> RtcpList;
29
30// Updates |rtcp_list| with timestamps from the latest RTCP SR.
31// |new_rtcp_sr| will be set to true if these are the timestamps which have
32// never be added to |rtcp_list|.
33bool UpdateRtcpList(uint32_t ntp_secs,
34                    uint32_t ntp_frac,
35                    uint32_t rtp_timestamp,
36                    RtcpList* rtcp_list,
37                    bool* new_rtcp_sr);
38
39// Converts an RTP timestamp to the NTP domain in milliseconds using two
40// (RTP timestamp, NTP timestamp) pairs.
41bool RtpToNtpMs(int64_t rtp_timestamp, const RtcpList& rtcp,
42                int64_t* timestamp_in_ms);
43
44// Returns 1 there has been a forward wrap around, 0 if there has been no wrap
45// around and -1 if there has been a backwards wrap around (i.e. reordering).
46int CheckForWrapArounds(uint32_t rtp_timestamp, uint32_t rtcp_rtp_timestamp);
47
48}  // namespace webrtc
49
50#endif  // SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_
51