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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/cast/pacing/paced_sender.h" | 5 #include "media/cast/pacing/paced_sender.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/message_loop/message_loop.h" | 9 #include "base/message_loop/message_loop.h" |
10 | 10 |
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35 UpdateBurstSize(num_of_packets_in_frame); | 35 UpdateBurstSize(num_of_packets_in_frame); |
36 return true; | 36 return true; |
37 } | 37 } |
38 UpdateBurstSize(num_of_packets_in_frame); | 38 UpdateBurstSize(num_of_packets_in_frame); |
39 | 39 |
40 if (packets_sent_in_burst_ >= burst_size_) { | 40 if (packets_sent_in_burst_ >= burst_size_) { |
41 packet_list_.push_back(packet); | 41 packet_list_.push_back(packet); |
42 return true; | 42 return true; |
43 } | 43 } |
44 ++packets_sent_in_burst_; | 44 ++packets_sent_in_burst_; |
45 return transport_->SendPacket(&(packet[0]), packet.size()); | 45 return transport_->SendPacket(packet); |
46 } | 46 } |
47 | 47 |
48 bool PacedSender::ResendPacket(const std::vector<uint8>& packet, | 48 bool PacedSender::ResendPacket(const std::vector<uint8>& packet, |
49 int num_of_packets_to_resend) { | 49 int num_of_packets_to_resend) { |
50 if (!packet_list_.empty() || !resend_packet_list_.empty()) { | 50 if (!packet_list_.empty() || !resend_packet_list_.empty()) { |
51 // We have a queue put the resend packets in the list. | 51 // We have a queue put the resend packets in the list. |
52 resend_packet_list_.push_back(packet); | 52 resend_packet_list_.push_back(packet); |
53 UpdateBurstSize(num_of_packets_to_resend); | 53 UpdateBurstSize(num_of_packets_to_resend); |
54 return true; | 54 return true; |
55 } | 55 } |
56 UpdateBurstSize(num_of_packets_to_resend); | 56 UpdateBurstSize(num_of_packets_to_resend); |
57 | 57 |
58 if (packets_sent_in_burst_ >= burst_size_) { | 58 if (packets_sent_in_burst_ >= burst_size_) { |
59 resend_packet_list_.push_back(packet); | 59 resend_packet_list_.push_back(packet); |
60 return true; | 60 return true; |
61 } | 61 } |
62 ++packets_sent_in_burst_; | 62 ++packets_sent_in_burst_; |
63 return transport_->SendPacket(&(packet[0]), packet.size()); | 63 return transport_->SendPacket(packet); |
64 } | 64 } |
65 | 65 |
66 bool PacedSender::SendRtcpPacket(const std::vector<uint8>& packet) { | 66 bool PacedSender::SendRtcpPacket(const std::vector<uint8>& packet) { |
67 // We pass the RTCP packets straight through. | 67 // We pass the RTCP packets straight through. |
68 return transport_->SendPacket(&(packet[0]), packet.size()); | 68 return transport_->SendPacket(packet); |
69 } | 69 } |
70 | 70 |
71 void PacedSender::ScheduleNextSend() { | 71 void PacedSender::ScheduleNextSend() { |
72 base::TimeDelta time_to_next = time_last_process_ - clock_->NowTicks() + | 72 base::TimeDelta time_to_next = time_last_process_ - clock_->NowTicks() + |
73 base::TimeDelta::FromMilliseconds(kPacingIntervalMs); | 73 base::TimeDelta::FromMilliseconds(kPacingIntervalMs); |
74 | 74 |
75 time_to_next = std::max(time_to_next, | 75 time_to_next = std::max(time_to_next, |
76 base::TimeDelta::FromMilliseconds(0)); | 76 base::TimeDelta::FromMilliseconds(0)); |
77 | 77 |
78 cast_thread_->PostDelayedTask(CastThread::MAIN, FROM_HERE, | 78 cast_thread_->PostDelayedTask(CastThread::MAIN, FROM_HERE, |
79 base::Bind(&PacedSender::SendNextPacketBurst, weak_factory_.GetWeakPtr()), | 79 base::Bind(&PacedSender::SendNextPacketBurst, weak_factory_.GetWeakPtr()), |
80 time_to_next); | 80 time_to_next); |
81 } | 81 } |
82 | 82 |
83 void PacedSender::SendNextPacketBurst() { | 83 void PacedSender::SendNextPacketBurst() { |
84 int packets_to_send = burst_size_; | 84 int packets_to_send = burst_size_; |
85 time_last_process_ = clock_->NowTicks(); | 85 time_last_process_ = clock_->NowTicks(); |
86 for (int i = 0; i < packets_to_send; ++i) { | 86 for (int i = 0; i < packets_to_send; ++i) { |
87 SendStoredPacket(); | 87 SendStoredPacket(); |
88 } | 88 } |
89 ScheduleNextSend(); | 89 ScheduleNextSend(); |
90 } | 90 } |
91 | 91 |
92 void PacedSender::SendStoredPacket() { | 92 void PacedSender::SendStoredPacket() { |
93 if (packet_list_.empty() && resend_packet_list_.empty()) return; | 93 if (packet_list_.empty() && resend_packet_list_.empty()) return; |
94 | 94 |
95 if (!resend_packet_list_.empty()) { | 95 if (!resend_packet_list_.empty()) { |
96 // Send our re-send packets first. | 96 // Send our re-send packets first. |
97 const std::vector<uint8>& packet = resend_packet_list_.front(); | 97 const std::vector<uint8>& packet = resend_packet_list_.front(); |
98 transport_->SendPacket(&(packet[0]), packet.size()); | 98 transport_->SendPacket(packet); |
99 resend_packet_list_.pop_front(); | 99 resend_packet_list_.pop_front(); |
100 } else { | 100 } else { |
101 const std::vector<uint8>& packet = packet_list_.front(); | 101 const std::vector<uint8>& packet = packet_list_.front(); |
102 transport_->SendPacket(&(packet[0]), packet.size()); | 102 transport_->SendPacket(packet); |
103 packet_list_.pop_front(); | 103 packet_list_.pop_front(); |
104 | 104 |
105 if (packet_list_.empty()) { | 105 if (packet_list_.empty()) { |
106 burst_size_ = 1; // Reset burst size after we sent the last stored packet | 106 burst_size_ = 1; // Reset burst size after we sent the last stored packet |
107 packets_sent_in_burst_ = 0; | 107 packets_sent_in_burst_ = 0; |
108 } | 108 } |
109 } | 109 } |
110 } | 110 } |
111 | 111 |
112 void PacedSender::UpdateBurstSize(int packets_to_send) { | 112 void PacedSender::UpdateBurstSize(int packets_to_send) { |
113 packets_to_send = std::max(packets_to_send, | 113 packets_to_send = std::max(packets_to_send, |
114 static_cast<int>(resend_packet_list_.size() + packet_list_.size())); | 114 static_cast<int>(resend_packet_list_.size() + packet_list_.size())); |
115 | 115 |
116 packets_to_send += (kPacingMaxBurstsPerFrame - 1); // Round up. | 116 packets_to_send += (kPacingMaxBurstsPerFrame - 1); // Round up. |
117 | 117 |
118 burst_size_ = std::max(packets_to_send / kPacingMaxBurstsPerFrame, | 118 burst_size_ = std::max(packets_to_send / kPacingMaxBurstsPerFrame, |
119 burst_size_); | 119 burst_size_); |
120 } | 120 } |
121 | 121 |
122 } // namespace cast | 122 } // namespace cast |
123 } // namespace media | 123 } // namespace media |
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