bitrate.h revision 6811b6e308d16f160ba4c32650f195d5d3d9a2b1 
1/*
2 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_
12#define WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_
13
14#include <stdio.h>
15
16#include <list>
17
18#include "webrtc/common_types.h"
19#include "webrtc/modules/rtp_rtcp/source/rtp_rtcp_config.h"
20#include "webrtc/system_wrappers/interface/scoped_ptr.h"
21#include "webrtc/typedefs.h"
22
23namespace webrtc {
24
25class Clock;
26class CriticalSectionWrapper;
27
28class Bitrate {
29 public:
30  class Observer;
31  Bitrate(Clock* clock, Observer* observer);
32  virtual ~Bitrate();
33
34  // Calculates rates.
35  void Process();
36
37  // Update with a packet.
38  void Update(const int32_t bytes);
39
40  // Packet rate last second, updated roughly every 100 ms.
41  uint32_t PacketRate() const;
42
43  // Bitrate last second, updated roughly every 100 ms.
44  uint32_t BitrateLast() const;
45
46  // Bitrate last second, updated now.
47  uint32_t BitrateNow() const;
48
49  int64_t time_last_rate_update() const;
50
51  class Observer {
52   public:
53    Observer() {}
54    virtual ~Observer() {}
55
56    virtual void BitrateUpdated(const BitrateStatistics& stats) = 0;
57  };
58
59 protected:
60  Clock* clock_;
61
62 private:
63  scoped_ptr<CriticalSectionWrapper> crit_;
64  uint32_t packet_rate_;
65  uint32_t bitrate_;
66  uint8_t bitrate_next_idx_;
67  int64_t packet_rate_array_[10];
68  int64_t bitrate_array_[10];
69  int64_t bitrate_diff_ms_[10];
70  int64_t time_last_rate_update_;
71  uint32_t bytes_count_;
72  uint32_t packet_count_;
73  Observer* const observer_;
74};
75
76}  // namespace webrtc
77
78#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_
79