| /* |
| * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "system_wrappers/include/rtp_to_ntp_estimator.h" |
| #include "test/gtest.h" |
| |
| namespace webrtc { |
| namespace { |
| const uint32_t kOneMsInNtpFrac = 4294967; |
| const uint32_t kTimestampTicksPerMs = 90; |
| } // namespace |
| |
| TEST(WrapAroundTests, OldRtcpWrapped_OldRtpTimestamp) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp -= kTimestampTicksPerMs; |
| // No wraparound will be detected, since we are not allowed to wrap below 0, |
| // but there will be huge rtp timestamp jump, e.g. old_timestamp = 0, |
| // new_timestamp = 4294967295, which should be detected. |
| EXPECT_FALSE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| } |
| |
| TEST(WrapAroundTests, OldRtcpWrapped_OldRtpTimestamp_Wraparound_Detected) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0xFFFFFFFE; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += 2 * kOneMsInNtpFrac; |
| timestamp += 2 * kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp -= kTimestampTicksPerMs; |
| // Expected to fail since the older RTCP has a smaller RTP timestamp than the |
| // newer (old:10, new:4294967206). |
| EXPECT_FALSE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| } |
| |
| TEST(WrapAroundTests, NewRtcpWrapped) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0xFFFFFFFF; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| int64_t timestamp_ms = -1; |
| EXPECT_TRUE(estimator.Estimate(0xFFFFFFFF, ×tamp_ms)); |
| // Since this RTP packet has the same timestamp as the RTCP packet constructed |
| // at time 0 it should be mapped to 0 as well. |
| EXPECT_EQ(0, timestamp_ms); |
| } |
| |
| TEST(WrapAroundTests, RtpWrapped) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0xFFFFFFFF - 2 * kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| |
| int64_t timestamp_ms = -1; |
| EXPECT_TRUE( |
| estimator.Estimate(0xFFFFFFFF - 2 * kTimestampTicksPerMs, ×tamp_ms)); |
| // Since this RTP packet has the same timestamp as the RTCP packet constructed |
| // at time 0 it should be mapped to 0 as well. |
| EXPECT_EQ(0, timestamp_ms); |
| // Two kTimestampTicksPerMs advanced. |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE(estimator.Estimate(timestamp, ×tamp_ms)); |
| EXPECT_EQ(2, timestamp_ms); |
| // Wrapped rtp. |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE(estimator.Estimate(timestamp, ×tamp_ms)); |
| EXPECT_EQ(3, timestamp_ms); |
| } |
| |
| TEST(WrapAroundTests, OldRtp_RtcpsWrapped) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0xFFFFFFFF; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| timestamp -= 2 * kTimestampTicksPerMs; |
| int64_t timestamp_ms = 0xFFFFFFFF; |
| EXPECT_FALSE(estimator.Estimate(timestamp, ×tamp_ms)); |
| } |
| |
| TEST(WrapAroundTests, OldRtp_NewRtcpWrapped) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0xFFFFFFFF; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| timestamp -= kTimestampTicksPerMs; |
| int64_t timestamp_ms = -1; |
| EXPECT_TRUE(estimator.Estimate(timestamp, ×tamp_ms)); |
| // Constructed at the same time as the first RTCP and should therefore be |
| // mapped to zero. |
| EXPECT_EQ(0, timestamp_ms); |
| } |
| |
| TEST(WrapAroundTests, GracefullyHandleRtpJump) { |
| RtpToNtpEstimator estimator; |
| bool new_sr; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 1; |
| uint32_t timestamp = 0; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp -= kTimestampTicksPerMs; |
| int64_t timestamp_ms = -1; |
| EXPECT_TRUE(estimator.Estimate(timestamp, ×tamp_ms)); |
| // Constructed at the same time as the first RTCP and should therefore be |
| // mapped to zero. |
| EXPECT_EQ(0, timestamp_ms); |
| |
| timestamp -= 0xFFFFF; |
| for (int i = 0; i < RtpToNtpEstimator::kMaxInvalidSamples - 1; ++i) { |
| EXPECT_FALSE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| } |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| |
| timestamp_ms = -1; |
| EXPECT_TRUE(estimator.Estimate(timestamp, ×tamp_ms)); |
| // 6 milliseconds has passed since the start of the test. |
| EXPECT_EQ(6, timestamp_ms); |
| } |
| |
| TEST(UpdateRtcpMeasurementTests, FailsForZeroNtp) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 0; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_FALSE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_FALSE(new_sr); |
| } |
| |
| TEST(UpdateRtcpMeasurementTests, FailsForEqualNtp) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 699925050; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(new_sr); |
| // Ntp time already added, list not updated. |
| ++timestamp; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_FALSE(new_sr); |
| } |
| |
| TEST(UpdateRtcpMeasurementTests, FailsForOldNtp) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 1; |
| uint32_t ntp_frac = 699925050; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(new_sr); |
| // Old ntp time, list not updated. |
| ntp_frac -= kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_FALSE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| } |
| |
| TEST(UpdateRtcpMeasurementTests, FailsForEqualTimestamp) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 2; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(new_sr); |
| // Timestamp already added, list not updated. |
| ++ntp_frac; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_FALSE(new_sr); |
| } |
| |
| TEST(UpdateRtcpMeasurementTests, FailsForOldRtpTimestamp) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 0; |
| uint32_t ntp_frac = 2; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(new_sr); |
| // Old timestamp, list not updated. |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp -= kTimestampTicksPerMs; |
| EXPECT_FALSE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_FALSE(new_sr); |
| } |
| |
| TEST(UpdateRtcpMeasurementTests, VerifyParameters) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 1; |
| uint32_t ntp_frac = 2; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(new_sr); |
| EXPECT_FALSE(estimator.params()); |
| // Add second report, parameters should be calculated. |
| ntp_frac += kOneMsInNtpFrac; |
| timestamp += kTimestampTicksPerMs; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(estimator.params()); |
| EXPECT_DOUBLE_EQ(90.0, estimator.params()->frequency_khz); |
| EXPECT_NE(0.0, estimator.params()->offset_ms); |
| } |
| |
| TEST(RtpToNtpTests, FailsForNoParameters) { |
| RtpToNtpEstimator estimator; |
| uint32_t ntp_sec = 1; |
| uint32_t ntp_frac = 2; |
| uint32_t timestamp = 0x12345678; |
| bool new_sr; |
| EXPECT_TRUE( |
| estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr)); |
| EXPECT_TRUE(new_sr); |
| // Parameters are not calculated, conversion of RTP to NTP time should fail. |
| EXPECT_FALSE(estimator.params()); |
| int64_t timestamp_ms = -1; |
| EXPECT_FALSE(estimator.Estimate(timestamp, ×tamp_ms)); |
| } |
| |
| }; // namespace webrtc |