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1 /* | 1 /* |
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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33 int64_t GetFeedbackInterval() const; | 33 int64_t GetFeedbackInterval() const; |
34 // Returns true if the bitrate estimate hasn't been changed for more than | 34 // Returns true if the bitrate estimate hasn't been changed for more than |
35 // an RTT, or if the incoming_bitrate is more than 5% above the current | 35 // an RTT, or if the incoming_bitrate is more than 5% above the current |
36 // estimate. Should be used to decide if we should reduce the rate further | 36 // estimate. Should be used to decide if we should reduce the rate further |
37 // when over-using. | 37 // when over-using. |
38 bool TimeToReduceFurther(int64_t time_now, | 38 bool TimeToReduceFurther(int64_t time_now, |
39 uint32_t incoming_bitrate_bps) const; | 39 uint32_t incoming_bitrate_bps) const; |
40 uint32_t LatestEstimate() const; | 40 uint32_t LatestEstimate() const; |
41 uint32_t UpdateBandwidthEstimate(int64_t now_ms); | 41 uint32_t UpdateBandwidthEstimate(int64_t now_ms); |
42 void SetRtt(int64_t rtt); | 42 void SetRtt(int64_t rtt); |
43 RateControlRegion Update(const RateControlInput* input, int64_t now_ms); | 43 void Update(const RateControlInput* input, int64_t now_ms); |
44 void SetEstimate(int bitrate_bps, int64_t now_ms); | 44 void SetEstimate(int bitrate_bps, int64_t now_ms); |
45 | 45 |
46 private: | 46 private: |
47 // Update the target bitrate according based on, among other things, | 47 // Update the target bitrate according based on, among other things, |
48 // the current rate control state, the current target bitrate and the incoming | 48 // the current rate control state, the current target bitrate and the incoming |
49 // bitrate. When in the "increase" state the bitrate will be increased either | 49 // bitrate. When in the "increase" state the bitrate will be increased either |
50 // additively or multiplicatively depending on the rate control region. When | 50 // additively or multiplicatively depending on the rate control region. When |
51 // in the "decrease" state the bitrate will be decreased to slightly below the | 51 // in the "decrease" state the bitrate will be decreased to slightly below the |
52 // incoming bitrate. When in the "hold" state the bitrate will be kept | 52 // incoming bitrate. When in the "hold" state the bitrate will be kept |
53 // constant to allow built up queues to drain. | 53 // constant to allow built up queues to drain. |
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64 void ChangeState(RateControlState new_state); | 64 void ChangeState(RateControlState new_state); |
65 void ChangeRegion(RateControlRegion region); | 65 void ChangeRegion(RateControlRegion region); |
66 | 66 |
67 uint32_t min_configured_bitrate_bps_; | 67 uint32_t min_configured_bitrate_bps_; |
68 uint32_t max_configured_bitrate_bps_; | 68 uint32_t max_configured_bitrate_bps_; |
69 uint32_t current_bitrate_bps_; | 69 uint32_t current_bitrate_bps_; |
70 uint32_t max_hold_rate_bps_; | 70 uint32_t max_hold_rate_bps_; |
71 float avg_max_bitrate_kbps_; | 71 float avg_max_bitrate_kbps_; |
72 float var_max_bitrate_kbps_; | 72 float var_max_bitrate_kbps_; |
73 RateControlState rate_control_state_; | 73 RateControlState rate_control_state_; |
74 RateControlState came_from_state_; | |
75 RateControlRegion rate_control_region_; | 74 RateControlRegion rate_control_region_; |
76 int64_t time_last_bitrate_change_; | 75 int64_t time_last_bitrate_change_; |
77 RateControlInput current_input_; | 76 RateControlInput current_input_; |
78 bool updated_; | 77 bool updated_; |
79 int64_t time_first_incoming_estimate_; | 78 int64_t time_first_incoming_estimate_; |
80 bool bitrate_is_initialized_; | 79 bool bitrate_is_initialized_; |
81 float beta_; | 80 float beta_; |
82 int64_t rtt_; | 81 int64_t rtt_; |
83 int64_t time_of_last_log_; | 82 int64_t time_of_last_log_; |
| 83 bool in_experiment_; |
84 | 84 |
85 DISALLOW_IMPLICIT_CONSTRUCTORS(AimdRateControl); | 85 DISALLOW_IMPLICIT_CONSTRUCTORS(AimdRateControl); |
86 }; | 86 }; |
87 } // namespace webrtc | 87 } // namespace webrtc |
88 | 88 |
89 #endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_AIMD_RATE_CONTROL_H_ | 89 #endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_AIMD_RATE_CONTROL_H_ |
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