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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 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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29 } // namespace | 29 } // namespace |
30 | 30 |
31 namespace webrtc { | 31 namespace webrtc { |
32 | 32 |
33 AlrDetector::AlrDetector() | 33 AlrDetector::AlrDetector() |
34 : rate_(kMeasurementPeriodMs, RateStatistics::kBpsScale) {} | 34 : rate_(kMeasurementPeriodMs, RateStatistics::kBpsScale) {} |
35 | 35 |
36 AlrDetector::~AlrDetector() {} | 36 AlrDetector::~AlrDetector() {} |
37 | 37 |
38 void AlrDetector::OnBytesSent(size_t bytes_sent, int64_t now_ms) { | 38 void AlrDetector::OnBytesSent(size_t bytes_sent, int64_t now_ms) { |
39 // TODO(nisse): It's unclear what guarantees there are that this | |
40 // function isn't called before SetEstimatedBitrate. Document that | |
41 // guarantee, if it exists. Or else, remove the DCHECK and tolerate | |
42 // that current estimate is zero, e.g., by just returning false. | |
43 RTC_DCHECK(estimated_bitrate_bps_); | 39 RTC_DCHECK(estimated_bitrate_bps_); |
44 | 40 |
45 rate_.Update(bytes_sent, now_ms); | 41 rate_.Update(bytes_sent, now_ms); |
46 rtc::Optional<uint32_t> rate = rate_.Rate(now_ms); | 42 rtc::Optional<uint32_t> rate = rate_.Rate(now_ms); |
47 if (!rate) | 43 if (!rate) |
48 return; | 44 return; |
49 | 45 |
50 int percentage = static_cast<int>(*rate) * 100 / estimated_bitrate_bps_; | 46 int percentage = static_cast<int>(*rate) * 100 / estimated_bitrate_bps_; |
51 if (percentage < kAlrStartUsagePercent && !alr_started_time_ms_) { | 47 if (percentage < kAlrStartUsagePercent && !alr_started_time_ms_) { |
52 alr_started_time_ms_ = rtc::Optional<int64_t>(now_ms); | 48 alr_started_time_ms_ = rtc::Optional<int64_t>(now_ms); |
53 } else if (percentage > kAlrEndUsagePercent && alr_started_time_ms_) { | 49 } else if (percentage > kAlrEndUsagePercent && alr_started_time_ms_) { |
54 alr_started_time_ms_ = rtc::Optional<int64_t>(); | 50 alr_started_time_ms_ = rtc::Optional<int64_t>(); |
55 } | 51 } |
56 } | 52 } |
57 | 53 |
58 void AlrDetector::SetEstimatedBitrate(int bitrate_bps) { | 54 void AlrDetector::SetEstimatedBitrate(int bitrate_bps) { |
59 RTC_DCHECK(bitrate_bps); | 55 RTC_DCHECK(bitrate_bps); |
60 estimated_bitrate_bps_ = bitrate_bps; | 56 estimated_bitrate_bps_ = bitrate_bps; |
61 } | 57 } |
62 | 58 |
63 rtc::Optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime() | 59 rtc::Optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime() |
64 const { | 60 const { |
65 return alr_started_time_ms_; | 61 return alr_started_time_ms_; |
66 } | 62 } |
67 | 63 |
68 } // namespace webrtc | 64 } // namespace webrtc |
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