content/browser/renderer_host/p2p/socket_host_throttler.cc

   1 // Copyright (c) 2013 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 "content/browser/renderer_host/p2p/socket_host_throttler.h"
   6 #include "third_party/webrtc/base/ratelimiter.h"
   7 #include "third_party/webrtc/base/timing.h"
   8
   9 namespace content {
  10
  11 namespace  {
  12
  13 const int kMaxIceMessageBandwidth = 256 * 1024;
  14
  15 }  // namespace
  16
  17
  18 P2PMessageThrottler::P2PMessageThrottler()
  19     : timing_(new rtc::Timing()),
  20       rate_limiter_(new rtc::RateLimiter(kMaxIceMessageBandwidth, 1.0)) {
  21 }
  22
  23 P2PMessageThrottler::~P2PMessageThrottler() {
  24 }
  25
  26 void P2PMessageThrottler::SetTiming(scoped_ptr<rtc::Timing> timing) {
  27   timing_ = timing.Pass();
  28 }
  29
  30 void P2PMessageThrottler::SetSendIceBandwidth(int bandwidth_kbps) {
  31   rate_limiter_.reset(new rtc::RateLimiter(bandwidth_kbps, 1.0));
  32 }
  33
  34 bool P2PMessageThrottler::DropNextPacket(size_t packet_len) {
  35   double now = timing_->TimerNow();
  36   if (!rate_limiter_->CanUse(packet_len, now)) {
  37     // Exceeding the send rate, this packet should be dropped.
  38     return true;
  39   }
  40
  41   rate_limiter_->Use(packet_len, now);
  42   return false;
  43 }
  44
  45 }  // namespace content