Merge changes I7bbf776e,I1b827825

am: fe8b4a6579

* commit 'fe8b4a657979b49e1701bd92f6d5814a99e0b2be': (7237 commits)
  WIP: Changes after merge commit 'cb3f9bd'
  Make the nonlinear beamformer steerable
  Utilize bitrate above codec max to protect video.
  Enable VP9 internal resize by default.
  Filter overlapping RTP header extensions.
  Make VCMEncodedFrameCallback const.
  MediaCodecVideoEncoder: Add number of quality resolution downscales to Encoded callback.
  Remove redudant encoder rate calls.
  Create isolate files for nonparallel tests.
  Register header extensions in RtpRtcpObserver to avoid log spam.
  Make an enum class out of NetEqDecoder, and hide the neteq_decoders_ table
  ACM: Move NACK functionality inside NetEq
  Fix chromium-style warnings in webrtc/sound/.
  Create a 'webrtc_nonparallel_tests' target.
  Update scalability structure data according to updates in the RTP payload profile.
  audio_coding: rename interface -> include
  Rewrote perform_action_on_all_files to be parallell.
  Update reference indices according to updates in the RTP payload profile.
  Disable P2PTransport...TestFailoverControlledSide on Memcheck
  pass clangcl compile options to ignore warnings in gflags.cc
  ...

1 files changed, 130 insertions, 0 deletions

diff --git a/webrtc/modules/remote_bitrate_estimator/inter_arrival.cc b/webrtc/modules/remote_bitrate_estimator/inter_arrival.cc
new file mode 100644
index 0000000000..3dee305bad
--- /dev/null
+++ b/webrtc/modules/remote_bitrate_estimator/inter_arrival.cc
@@ -0,0 +1,130 @@
+/*
+ *  Copyright (c) 2013 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 "webrtc/modules/remote_bitrate_estimator/inter_arrival.h"
+
+#include <algorithm>
+#include <cassert>
+
+#include "webrtc/base/logging.h"
+#include "webrtc/modules/interface/module_common_types.h"
+
+namespace webrtc {
+
+static const int kBurstDeltaThresholdMs  = 5;
+
+InterArrival::InterArrival(uint32_t timestamp_group_length_ticks,
+                           double timestamp_to_ms_coeff,
+                           bool enable_burst_grouping)
+    : kTimestampGroupLengthTicks(timestamp_group_length_ticks),
+      current_timestamp_group_(),
+      prev_timestamp_group_(),
+      timestamp_to_ms_coeff_(timestamp_to_ms_coeff),
+      burst_grouping_(enable_burst_grouping) {}
+
+bool InterArrival::ComputeDeltas(uint32_t timestamp,
+                                 int64_t arrival_time_ms,
+                                 size_t packet_size,
+                                 uint32_t* timestamp_delta,
+                                 int64_t* arrival_time_delta_ms,
+                                 int* packet_size_delta) {
+  assert(timestamp_delta != NULL);
+  assert(arrival_time_delta_ms != NULL);
+  assert(packet_size_delta != NULL);
+  bool calculated_deltas = false;
+  if (current_timestamp_group_.IsFirstPacket()) {
+    // We don't have enough data to update the filter, so we store it until we
+    // have two frames of data to process.
+    current_timestamp_group_.timestamp = timestamp;
+    current_timestamp_group_.first_timestamp = timestamp;
+  } else if (!PacketInOrder(timestamp)) {
+    return false;
+  } else if (NewTimestampGroup(arrival_time_ms, timestamp)) {
+    // First packet of a later frame, the previous frame sample is ready.
+    if (prev_timestamp_group_.complete_time_ms >= 0) {
+      *timestamp_delta = current_timestamp_group_.timestamp -
+                         prev_timestamp_group_.timestamp;
+      *arrival_time_delta_ms = current_timestamp_group_.complete_time_ms -
+                               prev_timestamp_group_.complete_time_ms;
+      if (*arrival_time_delta_ms < 0) {
+        // The group of packets has been reordered since receiving its local
+        // arrival timestamp.
+        LOG(LS_WARNING) << "Packets are being reordered on the path from the "
+                           "socket to the bandwidth estimator. Ignoring this "
+                           "packet for bandwidth estimation.";
+        return false;
+      }
+      assert(*arrival_time_delta_ms >= 0);
+      *packet_size_delta = static_cast<int>(current_timestamp_group_.size) -
+          static_cast<int>(prev_timestamp_group_.size);
+      calculated_deltas = true;
+    }
+    prev_timestamp_group_ = current_timestamp_group_;
+    // The new timestamp is now the current frame.
+    current_timestamp_group_.first_timestamp = timestamp;
+    current_timestamp_group_.timestamp = timestamp;
+    current_timestamp_group_.size = 0;
+  }
+  else {
+    current_timestamp_group_.timestamp = LatestTimestamp(
+        current_timestamp_group_.timestamp, timestamp);
+  }
+  // Accumulate the frame size.
+  current_timestamp_group_.size += packet_size;
+  current_timestamp_group_.complete_time_ms = arrival_time_ms;
+
+  return calculated_deltas;
+}
+
+bool InterArrival::PacketInOrder(uint32_t timestamp) {
+  if (current_timestamp_group_.IsFirstPacket()) {
+    return true;
+  } else {
+    // Assume that a diff which is bigger than half the timestamp interval
+    // (32 bits) must be due to reordering. This code is almost identical to
+    // that in IsNewerTimestamp() in module_common_types.h.
+    uint32_t timestamp_diff = timestamp -
+        current_timestamp_group_.first_timestamp;
+    return timestamp_diff < 0x80000000;
+  }
+}
+
+// Assumes that |timestamp| is not reordered compared to
+// |current_timestamp_group_|.
+bool InterArrival::NewTimestampGroup(int64_t arrival_time_ms,
+                                     uint32_t timestamp) const {
+  if (current_timestamp_group_.IsFirstPacket()) {
+    return false;
+  } else if (BelongsToBurst(arrival_time_ms, timestamp)) {
+    return false;
+  } else {
+    uint32_t timestamp_diff = timestamp -
+        current_timestamp_group_.first_timestamp;
+    return timestamp_diff > kTimestampGroupLengthTicks;
+  }
+}
+
+bool InterArrival::BelongsToBurst(int64_t arrival_time_ms,
+                                  uint32_t timestamp) const {
+  if (!burst_grouping_) {
+    return false;
+  }
+  assert(current_timestamp_group_.complete_time_ms >= 0);
+  int64_t arrival_time_delta_ms = arrival_time_ms -
+      current_timestamp_group_.complete_time_ms;
+  uint32_t timestamp_diff = timestamp - current_timestamp_group_.timestamp;
+  int64_t ts_delta_ms = timestamp_to_ms_coeff_ * timestamp_diff + 0.5;
+  if (ts_delta_ms == 0)
+    return true;
+  int propagation_delta_ms = arrival_time_delta_ms - ts_delta_ms;
+  return propagation_delta_ms < 0 &&
+      arrival_time_delta_ms <= kBurstDeltaThresholdMs;
+}
+}  // namespace webrtc