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| 1 /* | 1 /* |
| 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #include "webrtc/system_wrappers/include/rtp_to_ntp_estimator.h" | 11 #include "webrtc/system_wrappers/include/rtp_to_ntp_estimator.h" |
| 12 | 12 |
| 13 #include "webrtc/base/logging.h" | 13 #include "webrtc/rtc_base/logging.h" |
| 14 #include "webrtc/system_wrappers/include/clock.h" | 14 #include "webrtc/system_wrappers/include/clock.h" |
| 15 | 15 |
| 16 namespace webrtc { | 16 namespace webrtc { |
| 17 namespace { | 17 namespace { |
| 18 // Number of RTCP SR reports to use to map between RTP and NTP. | 18 // Number of RTCP SR reports to use to map between RTP and NTP. |
| 19 const size_t kNumRtcpReportsToUse = 2; | 19 const size_t kNumRtcpReportsToUse = 2; |
| 20 | 20 |
| 21 // Calculates the RTP timestamp frequency from two pairs of NTP/RTP timestamps. | 21 // Calculates the RTP timestamp frequency from two pairs of NTP/RTP timestamps. |
| 22 bool CalculateFrequency(int64_t ntp_ms1, | 22 bool CalculateFrequency(int64_t ntp_ms1, |
| 23 uint32_t rtp_timestamp1, | 23 uint32_t rtp_timestamp1, |
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| 185 } | 185 } |
| 186 } else if (static_cast<int32_t>(old_timestamp - new_timestamp) > 0) { | 186 } else if (static_cast<int32_t>(old_timestamp - new_timestamp) > 0) { |
| 187 // This difference should be less than -2^31 if we have had a backward wrap | 187 // This difference should be less than -2^31 if we have had a backward wrap |
| 188 // around. Since it is cast to a int32_t, it should be positive. | 188 // around. Since it is cast to a int32_t, it should be positive. |
| 189 return -1; | 189 return -1; |
| 190 } | 190 } |
| 191 return 0; | 191 return 0; |
| 192 } | 192 } |
| 193 | 193 |
| 194 } // namespace webrtc | 194 } // namespace webrtc |
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