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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 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/sender/frame_sender.h" | 5 #include "media/cast/sender/frame_sender.h" |
6 | 6 |
7 #include "base/trace_event/trace_event.h" | 7 #include "base/trace_event/trace_event.h" |
8 | 8 |
9 namespace media { | 9 namespace media { |
10 namespace cast { | 10 namespace cast { |
11 namespace { | 11 namespace { |
12 | 12 |
13 const int kMinSchedulingDelayMs = 1; | 13 const int kMinSchedulingDelayMs = 1; |
14 const int kNumAggressiveReportsSentAtStart = 100; | 14 const int kNumAggressiveReportsSentAtStart = 100; |
15 | 15 |
16 // The additional number of frames that can be in-flight when input exceeds the | 16 // The additional number of frames that can be in-flight when input exceeds the |
17 // maximum frame rate. | 17 // maximum frame rate. |
18 const int kMaxFrameBurst = 5; | 18 const int kMaxFrameBurst = 5; |
19 | 19 |
20 } // namespace | 20 } // namespace |
21 | 21 |
22 // Convenience macro used in logging statements throughout this file. | 22 // Convenience macro used in logging statements throughout this file. |
23 #define SENDER_SSRC (is_audio_ ? "AUDIO[" : "VIDEO[") << ssrc_ << "] " | 23 #define SENDER_SSRC (is_audio_ ? "AUDIO[" : "VIDEO[") << ssrc_ << "] " |
24 | 24 |
25 FrameSender::FrameSender(scoped_refptr<CastEnvironment> cast_environment, | 25 FrameSender::FrameSender(scoped_refptr<CastEnvironment> cast_environment, |
26 bool is_audio, | 26 bool is_audio, |
27 CastTransportSender* const transport_sender, | 27 CastTransportSender* const transport_sender, |
28 base::TimeDelta rtcp_interval, | |
29 int rtp_timebase, | 28 int rtp_timebase, |
30 uint32 ssrc, | 29 uint32 ssrc, |
31 double max_frame_rate, | 30 double max_frame_rate, |
32 base::TimeDelta min_playout_delay, | 31 base::TimeDelta min_playout_delay, |
33 base::TimeDelta max_playout_delay, | 32 base::TimeDelta max_playout_delay, |
34 CongestionControl* congestion_control) | 33 CongestionControl* congestion_control) |
35 : cast_environment_(cast_environment), | 34 : cast_environment_(cast_environment), |
36 transport_sender_(transport_sender), | 35 transport_sender_(transport_sender), |
37 ssrc_(ssrc), | 36 ssrc_(ssrc), |
38 rtcp_interval_(rtcp_interval), | |
39 min_playout_delay_(min_playout_delay == base::TimeDelta() ? | 37 min_playout_delay_(min_playout_delay == base::TimeDelta() ? |
40 max_playout_delay : min_playout_delay), | 38 max_playout_delay : min_playout_delay), |
41 max_playout_delay_(max_playout_delay), | 39 max_playout_delay_(max_playout_delay), |
42 send_target_playout_delay_(false), | 40 send_target_playout_delay_(false), |
43 max_frame_rate_(max_frame_rate), | 41 max_frame_rate_(max_frame_rate), |
44 num_aggressive_rtcp_reports_sent_(0), | 42 num_aggressive_rtcp_reports_sent_(0), |
45 last_sent_frame_id_(0), | 43 last_sent_frame_id_(0), |
46 latest_acked_frame_id_(0), | 44 latest_acked_frame_id_(0), |
47 duplicate_ack_counter_(0), | 45 duplicate_ack_counter_(0), |
48 congestion_control_(congestion_control), | 46 congestion_control_(congestion_control), |
49 rtp_timebase_(rtp_timebase), | 47 rtp_timebase_(rtp_timebase), |
50 is_audio_(is_audio), | 48 is_audio_(is_audio), |
51 weak_factory_(this) { | 49 weak_factory_(this) { |
52 DCHECK(transport_sender_); | 50 DCHECK(transport_sender_); |
53 DCHECK_GT(rtp_timebase_, 0); | 51 DCHECK_GT(rtp_timebase_, 0); |
54 DCHECK(congestion_control_); | 52 DCHECK(congestion_control_); |
55 SetTargetPlayoutDelay(min_playout_delay_); | 53 SetTargetPlayoutDelay(min_playout_delay_); |
56 send_target_playout_delay_ = false; | 54 send_target_playout_delay_ = false; |
57 memset(frame_rtp_timestamps_, 0, sizeof(frame_rtp_timestamps_)); | 55 memset(frame_rtp_timestamps_, 0, sizeof(frame_rtp_timestamps_)); |
58 } | 56 } |
59 | 57 |
60 FrameSender::~FrameSender() { | 58 FrameSender::~FrameSender() { |
61 } | 59 } |
62 | 60 |
63 void FrameSender::ScheduleNextRtcpReport() { | 61 void FrameSender::ScheduleNextRtcpReport() { |
64 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 62 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
65 base::TimeDelta time_to_next = rtcp_interval_; | |
66 | |
67 time_to_next = std::max( | |
68 time_to_next, base::TimeDelta::FromMilliseconds(kMinSchedulingDelayMs)); | |
69 | 63 |
70 cast_environment_->PostDelayedTask( | 64 cast_environment_->PostDelayedTask( |
71 CastEnvironment::MAIN, | 65 CastEnvironment::MAIN, FROM_HERE, |
72 FROM_HERE, | |
73 base::Bind(&FrameSender::SendRtcpReport, weak_factory_.GetWeakPtr(), | 66 base::Bind(&FrameSender::SendRtcpReport, weak_factory_.GetWeakPtr(), |
74 true), | 67 true), |
75 time_to_next); | 68 base::TimeDelta::FromMilliseconds(kDefaultRtcpIntervalMs)); |
76 } | 69 } |
77 | 70 |
78 void FrameSender::SendRtcpReport(bool schedule_future_reports) { | 71 void FrameSender::SendRtcpReport(bool schedule_future_reports) { |
79 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 72 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
80 | 73 |
81 // Sanity-check: We should have sent at least the first frame by this point. | 74 // Sanity-check: We should have sent at least the first frame by this point. |
82 DCHECK(!last_send_time_.is_null()); | 75 DCHECK(!last_send_time_.is_null()); |
83 | 76 |
84 // Create lip-sync info for the sender report. The last sent frame's | 77 // Create lip-sync info for the sender report. The last sent frame's |
85 // reference time and RTP timestamp are used to estimate an RTP timestamp in | 78 // reference time and RTP timestamp are used to estimate an RTP timestamp in |
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377 VLOG(1) << SENDER_SSRC << "Dropping: In-flight duration would be too high."; | 370 VLOG(1) << SENDER_SSRC << "Dropping: In-flight duration would be too high."; |
378 return true; | 371 return true; |
379 } | 372 } |
380 | 373 |
381 // Next frame is accepted. | 374 // Next frame is accepted. |
382 return false; | 375 return false; |
383 } | 376 } |
384 | 377 |
385 } // namespace cast | 378 } // namespace cast |
386 } // namespace media | 379 } // namespace media |
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