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Issue 992733002: Remove //net (except for Android test stuff) and sdch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 9 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "net/quic/quic_bandwidth.h"
6
7 #include "base/logging.h"
8 #include "base/time/time.h"
9
10 namespace net {
11
12 // Highest number that QuicBandwidth can hold.
13 const int64 kQuicInfiniteBandwidth = GG_INT64_C(0x7fffffffffffffff);
14
15 // static
16 QuicBandwidth QuicBandwidth::Zero() {
17 return QuicBandwidth(0);
18 }
19
20 // static
21 QuicBandwidth QuicBandwidth::FromBitsPerSecond(int64 bits_per_second) {
22 return QuicBandwidth(bits_per_second);
23 }
24
25 // static
26 QuicBandwidth QuicBandwidth::FromKBitsPerSecond(int64 k_bits_per_second) {
27 DCHECK(k_bits_per_second < kQuicInfiniteBandwidth / 1000);
28 return QuicBandwidth(k_bits_per_second * 1000);
29 }
30
31 // static
32 QuicBandwidth QuicBandwidth::FromBytesPerSecond(int64 bytes_per_second) {
33 DCHECK(bytes_per_second < kQuicInfiniteBandwidth / 8);
34 return QuicBandwidth(bytes_per_second * 8);
35 }
36
37 // static
38 QuicBandwidth QuicBandwidth::FromKBytesPerSecond(int64 k_bytes_per_second) {
39 DCHECK(k_bytes_per_second < kQuicInfiniteBandwidth / 8000);
40 return QuicBandwidth(k_bytes_per_second * 8000);
41 }
42
43 // static
44 QuicBandwidth QuicBandwidth::FromBytesAndTimeDelta(QuicByteCount bytes,
45 QuicTime::Delta delta) {
46 DCHECK_LT(bytes,
47 static_cast<uint64>(kQuicInfiniteBandwidth /
48 (8 * base::Time::kMicrosecondsPerSecond)));
49 int64 bytes_per_second = (bytes * base::Time::kMicrosecondsPerSecond) /
50 delta.ToMicroseconds();
51 return QuicBandwidth(bytes_per_second * 8);
52 }
53
54 QuicBandwidth::QuicBandwidth(int64 bits_per_second)
55 : bits_per_second_(bits_per_second) {
56 DCHECK_GE(bits_per_second, 0);
57 }
58
59 int64 QuicBandwidth::ToBitsPerSecond() const {
60 return bits_per_second_;
61 }
62
63 int64 QuicBandwidth::ToKBitsPerSecond() const {
64 return bits_per_second_ / 1000;
65 }
66
67 int64 QuicBandwidth::ToBytesPerSecond() const {
68 return bits_per_second_ / 8;
69 }
70
71 int64 QuicBandwidth::ToKBytesPerSecond() const {
72 return bits_per_second_ / 8000;
73 }
74
75 QuicByteCount QuicBandwidth::ToBytesPerPeriod(
76 QuicTime::Delta time_period) const {
77 return ToBytesPerSecond() * time_period.ToMicroseconds() /
78 base::Time::kMicrosecondsPerSecond;
79 }
80
81 int64 QuicBandwidth::ToKBytesPerPeriod(QuicTime::Delta time_period) const {
82 return ToKBytesPerSecond() * time_period.ToMicroseconds() /
83 base::Time::kMicrosecondsPerSecond;
84 }
85
86 bool QuicBandwidth::IsZero() const {
87 return (bits_per_second_ == 0);
88 }
89
90 QuicBandwidth QuicBandwidth::Add(const QuicBandwidth& delta) const {
91 return QuicBandwidth(bits_per_second_ + delta.bits_per_second_);
92 }
93
94 QuicBandwidth QuicBandwidth::Subtract(const QuicBandwidth& delta) const {
95 return QuicBandwidth(bits_per_second_ - delta.bits_per_second_);
96 }
97
98 QuicBandwidth QuicBandwidth::Scale(float scale_factor) const {
99 return QuicBandwidth(static_cast<int64>(bits_per_second_ * scale_factor));
100 }
101
102 QuicTime::Delta QuicBandwidth::TransferTime(QuicByteCount bytes) const {
103 if (bits_per_second_ == 0) {
104 return QuicTime::Delta::Zero();
105 }
106 return QuicTime::Delta::FromMicroseconds(
107 bytes * 8 * base::Time::kMicrosecondsPerSecond / bits_per_second_);
108 }
109
110 } // namespace net
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