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| 1 // Copyright 2014 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 "media/cast/sender/frame_sender.h" |
| 6 |
| 7 namespace media { |
| 8 namespace cast { |
| 9 namespace { |
| 10 const int kMinSchedulingDelayMs = 1; |
| 11 } // namespace |
| 12 |
| 13 FrameSender::FrameSender(scoped_refptr<CastEnvironment> cast_environment, |
| 14 CastTransportSender* const transport_sender, |
| 15 base::TimeDelta rtcp_interval, |
| 16 int frequency, |
| 17 bool is_audio) |
| 18 : cast_environment_(cast_environment), |
| 19 transport_sender_(transport_sender), |
| 20 rtp_timestamp_helper_(frequency), |
| 21 rtt_available_(false), |
| 22 rtcp_interval_(rtcp_interval), |
| 23 is_audio_(is_audio), |
| 24 weak_factory_(this) { |
| 25 } |
| 26 |
| 27 FrameSender::~FrameSender() { |
| 28 } |
| 29 |
| 30 void FrameSender::ScheduleNextRtcpReport() { |
| 31 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
| 32 base::TimeDelta time_to_next = rtcp_interval_; |
| 33 |
| 34 time_to_next = std::max( |
| 35 time_to_next, base::TimeDelta::FromMilliseconds(kMinSchedulingDelayMs)); |
| 36 |
| 37 cast_environment_->PostDelayedTask( |
| 38 CastEnvironment::MAIN, |
| 39 FROM_HERE, |
| 40 base::Bind(&FrameSender::SendRtcpReport, weak_factory_.GetWeakPtr(), |
| 41 true), |
| 42 time_to_next); |
| 43 } |
| 44 |
| 45 void FrameSender::SendRtcpReport(bool schedule_future_reports) { |
| 46 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
| 47 const base::TimeTicks now = cast_environment_->Clock()->NowTicks(); |
| 48 uint32 now_as_rtp_timestamp = 0; |
| 49 if (rtp_timestamp_helper_.GetCurrentTimeAsRtpTimestamp( |
| 50 now, &now_as_rtp_timestamp)) { |
| 51 transport_sender_->SendRtcpFromRtpSender(is_audio_, now, |
| 52 now_as_rtp_timestamp); |
| 53 } else { |
| 54 // |rtp_timestamp_helper_| should have stored a mapping by this point. |
| 55 NOTREACHED(); |
| 56 } |
| 57 if (schedule_future_reports) |
| 58 ScheduleNextRtcpReport(); |
| 59 } |
| 60 |
| 61 void FrameSender::OnReceivedRtt(base::TimeDelta rtt, |
| 62 base::TimeDelta avg_rtt, |
| 63 base::TimeDelta min_rtt, |
| 64 base::TimeDelta max_rtt) { |
| 65 rtt_available_ = true; |
| 66 rtt_ = rtt; |
| 67 avg_rtt_ = avg_rtt; |
| 68 min_rtt_ = min_rtt; |
| 69 max_rtt_ = max_rtt; |
| 70 } |
| 71 |
| 72 } // namespace cast |
| 73 } // namespace media |
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