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_