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| 1 /* | 1 /* |
| 2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2015 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 |
| 11 #include "webrtc/base/ratetracker.h" | 11 #include "webrtc/base/ratetracker.h" |
| 12 | 12 |
| 13 #include <stddef.h> | 13 #include <stddef.h> |
| 14 | 14 |
| 15 #include <algorithm> | 15 #include <algorithm> |
| 16 | 16 |
| 17 #include "webrtc/base/checks.h" | 17 #include "webrtc/base/checks.h" |
| 18 #include "webrtc/base/timeutils.h" | 18 #include "webrtc/base/timeutils.h" |
| 19 | 19 |
| 20 namespace rtc { | 20 namespace rtc { |
| 21 | 21 |
| 22 RateTracker::RateTracker( | 22 RateTracker::RateTracker( |
| 23 uint32 bucket_milliseconds, size_t bucket_count) | 23 uint32 bucket_milliseconds, size_t bucket_count) |
| 24 : bucket_milliseconds_(bucket_milliseconds), | 24 : bucket_milliseconds_(bucket_milliseconds), |
| 25 bucket_count_(bucket_count), | 25 bucket_count_(bucket_count), |
| 26 sample_buckets_(new size_t[bucket_count + 1]), | 26 sample_buckets_(new size_t[bucket_count + 1]), |
| 27 total_sample_count_(0u), | 27 total_sample_count_(0u), |
| 28 bucket_start_time_milliseconds_(~0u) { | 28 bucket_start_time_milliseconds_(~0u) { |
| 29 CHECK(bucket_milliseconds > 0u); | 29 RTC_CHECK(bucket_milliseconds > 0u); |
| 30 CHECK(bucket_count > 0u); | 30 RTC_CHECK(bucket_count > 0u); |
| 31 } | 31 } |
| 32 | 32 |
| 33 RateTracker::~RateTracker() { | 33 RateTracker::~RateTracker() { |
| 34 delete[] sample_buckets_; | 34 delete[] sample_buckets_; |
| 35 } | 35 } |
| 36 | 36 |
| 37 double RateTracker::ComputeRateForInterval( | 37 double RateTracker::ComputeRateForInterval( |
| 38 uint32 interval_milliseconds) const { | 38 uint32 interval_milliseconds) const { |
| 39 if (bucket_start_time_milliseconds_ == ~0u) { | 39 if (bucket_start_time_milliseconds_ == ~0u) { |
| 40 return 0.0; | 40 return 0.0; |
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| 138 // current_bucket_ increments. | 138 // current_bucket_ increments. |
| 139 sample_buckets_[current_bucket_] = 0u; | 139 sample_buckets_[current_bucket_] = 0u; |
| 140 } | 140 } |
| 141 } | 141 } |
| 142 | 142 |
| 143 size_t RateTracker::NextBucketIndex(size_t bucket_index) const { | 143 size_t RateTracker::NextBucketIndex(size_t bucket_index) const { |
| 144 return (bucket_index + 1u) % (bucket_count_ + 1u); | 144 return (bucket_index + 1u) % (bucket_count_ + 1u); |
| 145 } | 145 } |
| 146 | 146 |
| 147 } // namespace rtc | 147 } // namespace rtc |
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