1 files changed, 109 insertions, 0 deletions
diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq/statistics_calculator.h b/chromium/third_party/webrtc/modules/audio_coding/neteq/statistics_calculator.h
new file mode 100644
index 00000000000..07ef8536fa8
--- /dev/null
+++ b/chromium/third_party/webrtc/modules/audio_coding/neteq/statistics_calculator.h
@@ -0,0 +1,109 @@
+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_STATISTICS_CALCULATOR_H_
+#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_STATISTICS_CALCULATOR_H_
+
+#include <vector>
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/modules/audio_coding/neteq/interface/neteq.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+// Forward declarations.
+class DecisionLogic;
+class DelayManager;
+
+// This class handles various network statistics in NetEq.
+class StatisticsCalculator {
+ public:
+  StatisticsCalculator();
+
+  virtual ~StatisticsCalculator() {}
+
+  // Resets most of the counters.
+  void Reset();
+
+  // Resets the counters that are not handled by Reset().
+  void ResetMcu();
+
+  // Resets the waiting time statistics.
+  void ResetWaitingTimeStatistics();
+
+  // Reports that |num_samples| samples were produced through expansion, and
+  // that the expansion produced other than just noise samples.
+  void ExpandedVoiceSamples(int num_samples);
+
+  // Reports that |num_samples| samples were produced through expansion, and
+  // that the expansion produced only noise samples.
+  void ExpandedNoiseSamples(int num_samples);
+
+  // Reports that |num_samples| samples were produced through preemptive
+  // expansion.
+  void PreemptiveExpandedSamples(int num_samples);
+
+  // Reports that |num_samples| samples were removed through accelerate.
+  void AcceleratedSamples(int num_samples);
+
+  // Reports that |num_samples| zeros were inserted into the output.
+  void AddZeros(int num_samples);
+
+  // Reports that |num_packets| packets were discarded.
+  void PacketsDiscarded(int num_packets);
+
+  // Reports that |num_samples| were lost.
+  void LostSamples(int num_samples);
+
+  // Increases the report interval counter with |num_samples| at a sample rate
+  // of |fs_hz|.
+  void IncreaseCounter(int num_samples, int fs_hz);
+
+  // Stores new packet waiting time in waiting time statistics.
+  void StoreWaitingTime(int waiting_time_ms);
+
+  // Returns the current network statistics in |stats|. The current sample rate
+  // is |fs_hz|, the total number of samples in packet buffer and sync buffer
+  // yet to play out is |num_samples_in_buffers|, and the number of samples per
+  // packet is |samples_per_packet|.
+  void GetNetworkStatistics(int fs_hz,
+                            int num_samples_in_buffers,
+                            int samples_per_packet,
+                            const DelayManager& delay_manager,
+                            const DecisionLogic& decision_logic,
+                            NetEqNetworkStatistics *stats);
+
+  void WaitingTimes(std::vector<int>* waiting_times);
+
+ private:
+  static const int kMaxReportPeriod = 60;  // Seconds before auto-reset.
+  static const int kLenWaitingTimes = 100;
+
+  // Calculates numerator / denominator, and returns the value in Q14.
+  static int CalculateQ14Ratio(uint32_t numerator, uint32_t denominator);
+
+  uint32_t preemptive_samples_;
+  uint32_t accelerate_samples_;
+  int added_zero_samples_;
+  uint32_t expanded_voice_samples_;
+  uint32_t expanded_noise_samples_;
+  int discarded_packets_;
+  uint32_t lost_timestamps_;
+  uint32_t last_report_timestamp_;
+  int waiting_times_[kLenWaitingTimes];  // Used as a circular buffer.
+  int len_waiting_times_;
+  int next_waiting_time_index_;
+
+  DISALLOW_COPY_AND_ASSIGN(StatisticsCalculator);
+};
+
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_STATISTICS_CALCULATOR_H_