1 files changed, 146 insertions, 0 deletions
diff --git a/chromium/third_party/webrtc/system_wrappers/source/rtp_to_ntp_unittest.cc b/chromium/third_party/webrtc/system_wrappers/source/rtp_to_ntp_unittest.cc
new file mode 100644
index 00000000000..a4d75aed04a
--- /dev/null
+++ b/chromium/third_party/webrtc/system_wrappers/source/rtp_to_ntp_unittest.cc
@@ -0,0 +1,146 @@
+/*
+ *  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 "testing/gtest/include/gtest/gtest.h"
+#include "webrtc/system_wrappers/interface/rtp_to_ntp.h"
+
+namespace webrtc {
+
+TEST(WrapAroundTests, NoWrap) {
+  EXPECT_EQ(0, CheckForWrapArounds(0xFFFFFFFF, 0xFFFFFFFE));
+  EXPECT_EQ(0, CheckForWrapArounds(1, 0));
+  EXPECT_EQ(0, CheckForWrapArounds(0x00010000, 0x0000FFFF));
+}
+
+TEST(WrapAroundTests, ForwardWrap) {
+  EXPECT_EQ(1, CheckForWrapArounds(0, 0xFFFFFFFF));
+  EXPECT_EQ(1, CheckForWrapArounds(0, 0xFFFF0000));
+  EXPECT_EQ(1, CheckForWrapArounds(0x0000FFFF, 0xFFFFFFFF));
+  EXPECT_EQ(1, CheckForWrapArounds(0x0000FFFF, 0xFFFF0000));
+}
+
+TEST(WrapAroundTests, BackwardWrap) {
+  EXPECT_EQ(-1, CheckForWrapArounds(0xFFFFFFFF, 0));
+  EXPECT_EQ(-1, CheckForWrapArounds(0xFFFF0000, 0));
+  EXPECT_EQ(-1, CheckForWrapArounds(0xFFFFFFFF, 0x0000FFFF));
+  EXPECT_EQ(-1, CheckForWrapArounds(0xFFFF0000, 0x0000FFFF));
+}
+
+TEST(WrapAroundTests, OldRtcpWrapped) {
+  RtcpList rtcp;
+  uint32_t ntp_sec = 0;
+  uint32_t ntp_frac = 0;
+  uint32_t timestamp = 0;
+  const uint32_t kOneMsInNtpFrac = 4294967;
+  const uint32_t kTimestampTicksPerMs = 90;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp -= kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp -= kTimestampTicksPerMs;
+  int64_t timestamp_in_ms = -1;
+  // This expected to fail since it's highly unlikely that the older RTCP
+  // has a much smaller RTP timestamp than the newer.
+  EXPECT_FALSE(RtpToNtpMs(timestamp, rtcp, &timestamp_in_ms));
+}
+
+TEST(WrapAroundTests, NewRtcpWrapped) {
+  RtcpList rtcp;
+  uint32_t ntp_sec = 0;
+  uint32_t ntp_frac = 0;
+  uint32_t timestamp = 0xFFFFFFFF;
+  const uint32_t kOneMsInNtpFrac = 4294967;
+  const uint32_t kTimestampTicksPerMs = 90;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp += kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  int64_t timestamp_in_ms = -1;
+  EXPECT_TRUE(RtpToNtpMs(rtcp.back().rtp_timestamp, rtcp, &timestamp_in_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_in_ms);
+}
+
+TEST(WrapAroundTests, RtpWrapped) {
+  const uint32_t kOneMsInNtpFrac = 4294967;
+  const uint32_t kTimestampTicksPerMs = 90;
+  RtcpList rtcp;
+  uint32_t ntp_sec = 0;
+  uint32_t ntp_frac = 0;
+  uint32_t timestamp = 0xFFFFFFFF - 2 * kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp += kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp += kTimestampTicksPerMs;
+  int64_t timestamp_in_ms = -1;
+  EXPECT_TRUE(RtpToNtpMs(timestamp, rtcp, &timestamp_in_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(2, timestamp_in_ms);
+}
+
+TEST(WrapAroundTests, OldRtp_RtcpsWrapped) {
+  const uint32_t kOneMsInNtpFrac = 4294967;
+  const uint32_t kTimestampTicksPerMs = 90;
+  RtcpList rtcp;
+  uint32_t ntp_sec = 0;
+  uint32_t ntp_frac = 0;
+  uint32_t timestamp = 0;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp += kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp -= 2*kTimestampTicksPerMs;
+  int64_t timestamp_in_ms = -1;
+  EXPECT_FALSE(RtpToNtpMs(timestamp, rtcp, &timestamp_in_ms));
+}
+
+TEST(WrapAroundTests, OldRtp_NewRtcpWrapped) {
+  const uint32_t kOneMsInNtpFrac = 4294967;
+  const uint32_t kTimestampTicksPerMs = 90;
+  RtcpList rtcp;
+  uint32_t ntp_sec = 0;
+  uint32_t ntp_frac = 0;
+  uint32_t timestamp = 0xFFFFFFFF;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp += kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp -= kTimestampTicksPerMs;
+  int64_t timestamp_in_ms = -1;
+  EXPECT_TRUE(RtpToNtpMs(timestamp, rtcp, &timestamp_in_ms));
+  // Constructed at the same time as the first RTCP and should therefore be
+  // mapped to zero.
+  EXPECT_EQ(0, timestamp_in_ms);
+}
+
+TEST(WrapAroundTests, OldRtp_OldRtcpWrapped) {
+  const uint32_t kOneMsInNtpFrac = 4294967;
+  const uint32_t kTimestampTicksPerMs = 90;
+  RtcpList rtcp;
+  uint32_t ntp_sec = 0;
+  uint32_t ntp_frac = 0;
+  uint32_t timestamp = 0;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp -= kTimestampTicksPerMs;
+  rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
+  ntp_frac += kOneMsInNtpFrac;
+  timestamp += 2*kTimestampTicksPerMs;
+  int64_t timestamp_in_ms = -1;
+  EXPECT_FALSE(RtpToNtpMs(timestamp, rtcp, &timestamp_in_ms));
+}
+};  // namespace webrtc