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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 | |
18 namespace webrtc { | |
19 | |
20 struct 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 | |
28 typedef 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|. | |
33 bool 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. | |
41 bool 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). | |
46 int CheckForWrapArounds(uint32_t rtp_timestamp, uint32_t rtcp_rtp_timestamp); | |
47 | |
48 } // namespace webrtc | |
49 | |
50 #endif // SYSTEM_WRAPPERS_INTERFACE_RTP_TO_NTP_H_ | |
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