Revert of Refactor NACK bitrate allocation

webrtc/modules/rtp_rtcp/source/bitrate.h

+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_
+#define WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_
+
+#include <stdio.h>
+
+#include <list>
+
+#include "webrtc/base/criticalsection.h"
+#include "webrtc/common_types.h"
+#include "webrtc/modules/rtp_rtcp/source/rtp_rtcp_config.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+class Clock;
+
+class Bitrate {
+ public:
+  class Observer;
+  Bitrate(Clock* clock, Observer* observer);
+  virtual ~Bitrate();
+
+  // Calculates rates.
+  void Process();
+
+  // Update with a packet.
+  void Update(const size_t bytes);
+
+  // Packet rate last second, updated roughly every 100 ms.
+  uint32_t PacketRate() const;
+
+  // Bitrate last second, updated roughly every 100 ms.
+  uint32_t BitrateLast() const;
+
+  // Bitrate last second, updated now.
+  uint32_t BitrateNow() const;
+
+  int64_t time_last_rate_update() const;
+
+  class Observer {
+   public:
+    Observer() {}
+    virtual ~Observer() {}
+
+    virtual void BitrateUpdated(const BitrateStatistics& stats) = 0;
+  };
+
+ protected:
+  Clock* clock_;
+
+ private:
+  rtc::CriticalSection crit_;
+  uint32_t packet_rate_;
+  uint32_t bitrate_;
+  uint8_t bitrate_next_idx_;
+  int64_t packet_rate_array_[10];
+  int64_t bitrate_array_[10];
+  int64_t bitrate_diff_ms_[10];
+  int64_t time_last_rate_update_;
+  size_t bytes_count_;
+  uint32_t packet_count_;
+  Observer* const observer_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_