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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/audio_receiver/audio_receiver.h" | 5 #include "media/cast/audio_receiver/audio_receiver.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/message_loop/message_loop.h" | 11 #include "base/message_loop/message_loop.h" |
12 #include "media/cast/audio_receiver/audio_decoder.h" | 12 #include "media/cast/audio_receiver/audio_decoder.h" |
13 #include "media/cast/transport/cast_transport_defines.h" | 13 #include "media/cast/transport/cast_transport_defines.h" |
14 | 14 |
15 namespace { | 15 namespace { |
16 const int kMinSchedulingDelayMs = 1; | 16 const int kMinSchedulingDelayMs = 1; |
17 // TODO(miu): This should go in AudioReceiverConfig. | 17 // TODO(miu): This should go in AudioReceiverConfig. |
18 const int kTypicalAudioFrameDurationMs = 10; | 18 const int kTypicalAudioFrameDurationMs = 10; |
19 } // namespace | 19 } // namespace |
20 | 20 |
21 namespace media { | 21 namespace media { |
22 namespace cast { | 22 namespace cast { |
23 | 23 |
24 AudioReceiver::AudioReceiver(scoped_refptr<CastEnvironment> cast_environment, | 24 AudioReceiver::AudioReceiver(scoped_refptr<CastEnvironment> cast_environment, |
25 const AudioReceiverConfig& audio_config, | 25 const AudioReceiverConfig& audio_config, |
26 transport::PacedPacketSender* const packet_sender) | 26 transport::PacedPacketSender* const packet_sender) |
27 : RtpReceiver(cast_environment->Clock(), &audio_config, NULL), | 27 : RtpReceiver(cast_environment->Clock(), &audio_config, NULL), |
28 cast_environment_(cast_environment), | 28 cast_environment_(cast_environment), |
29 event_subscriber_(kReceiverRtcpEventHistorySize, | 29 event_subscriber_(kReceiverRtcpEventHistorySize, AUDIO_EVENT), |
30 ReceiverRtcpEventSubscriber::kAudioEventSubscriber), | |
31 codec_(audio_config.codec), | 30 codec_(audio_config.codec), |
32 frequency_(audio_config.frequency), | 31 frequency_(audio_config.frequency), |
33 target_delay_delta_( | 32 target_delay_delta_( |
34 base::TimeDelta::FromMilliseconds(audio_config.rtp_max_delay_ms)), | 33 base::TimeDelta::FromMilliseconds(audio_config.rtp_max_delay_ms)), |
35 framer_(cast_environment->Clock(), | 34 framer_(cast_environment->Clock(), |
36 this, | 35 this, |
37 audio_config.incoming_ssrc, | 36 audio_config.incoming_ssrc, |
38 true, | 37 true, |
39 audio_config.rtp_max_delay_ms / kTypicalAudioFrameDurationMs), | 38 audio_config.rtp_max_delay_ms / kTypicalAudioFrameDurationMs), |
40 rtcp_(cast_environment, | 39 rtcp_(cast_environment, |
41 NULL, | 40 NULL, |
42 NULL, | 41 NULL, |
43 packet_sender, | 42 packet_sender, |
44 GetStatistics(), | 43 GetStatistics(), |
45 audio_config.rtcp_mode, | 44 audio_config.rtcp_mode, |
46 base::TimeDelta::FromMilliseconds(audio_config.rtcp_interval), | 45 base::TimeDelta::FromMilliseconds(audio_config.rtcp_interval), |
47 audio_config.feedback_ssrc, | 46 audio_config.feedback_ssrc, |
48 audio_config.incoming_ssrc, | 47 audio_config.incoming_ssrc, |
49 audio_config.rtcp_c_name), | 48 audio_config.rtcp_c_name, |
| 49 true), |
50 is_waiting_for_consecutive_frame_(false), | 50 is_waiting_for_consecutive_frame_(false), |
51 weak_factory_(this) { | 51 weak_factory_(this) { |
52 if (!audio_config.use_external_decoder) | 52 if (!audio_config.use_external_decoder) |
53 audio_decoder_.reset(new AudioDecoder(cast_environment, audio_config)); | 53 audio_decoder_.reset(new AudioDecoder(cast_environment, audio_config)); |
54 decryptor_.Initialize(audio_config.aes_key, audio_config.aes_iv_mask); | 54 decryptor_.Initialize(audio_config.aes_key, audio_config.aes_iv_mask); |
55 rtcp_.SetTargetDelay(target_delay_delta_); | 55 rtcp_.SetTargetDelay(target_delay_delta_); |
56 cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber_); | 56 cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber_); |
57 memset(frame_id_to_rtp_timestamp_, 0, sizeof(frame_id_to_rtp_timestamp_)); | 57 memset(frame_id_to_rtp_timestamp_, 0, sizeof(frame_id_to_rtp_timestamp_)); |
58 } | 58 } |
59 | 59 |
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77 // TODO(pwestin): update this as video to refresh over time. | 77 // TODO(pwestin): update this as video to refresh over time. |
78 if (time_first_incoming_packet_.is_null()) { | 78 if (time_first_incoming_packet_.is_null()) { |
79 InitializeTimers(); | 79 InitializeTimers(); |
80 first_incoming_rtp_timestamp_ = rtp_header.rtp_timestamp; | 80 first_incoming_rtp_timestamp_ = rtp_header.rtp_timestamp; |
81 time_first_incoming_packet_ = now; | 81 time_first_incoming_packet_ = now; |
82 } | 82 } |
83 | 83 |
84 frame_id_to_rtp_timestamp_[rtp_header.frame_id & 0xff] = | 84 frame_id_to_rtp_timestamp_[rtp_header.frame_id & 0xff] = |
85 rtp_header.rtp_timestamp; | 85 rtp_header.rtp_timestamp; |
86 cast_environment_->Logging()->InsertPacketEvent( | 86 cast_environment_->Logging()->InsertPacketEvent( |
87 now, kAudioPacketReceived, rtp_header.rtp_timestamp, | 87 now, PACKET_RECEIVED, AUDIO_EVENT, rtp_header.rtp_timestamp, |
88 rtp_header.frame_id, rtp_header.packet_id, rtp_header.max_packet_id, | 88 rtp_header.frame_id, rtp_header.packet_id, rtp_header.max_packet_id, |
89 payload_size); | 89 payload_size); |
90 | 90 |
91 bool duplicate = false; | 91 bool duplicate = false; |
92 const bool complete = | 92 const bool complete = |
93 framer_.InsertPacket(payload_data, payload_size, rtp_header, &duplicate); | 93 framer_.InsertPacket(payload_data, payload_size, rtp_header, &duplicate); |
94 if (duplicate) { | 94 |
95 cast_environment_->Logging()->InsertPacketEvent( | 95 // Duplicate packets are ignored. |
96 now, | 96 if (duplicate || !complete) |
97 kDuplicateAudioPacketReceived, | |
98 rtp_header.rtp_timestamp, | |
99 rtp_header.frame_id, | |
100 rtp_header.packet_id, | |
101 rtp_header.max_packet_id, | |
102 payload_size); | |
103 // Duplicate packets are ignored. | |
104 return; | |
105 } | |
106 if (!complete) | |
107 return; | 97 return; |
108 | 98 |
109 EmitAvailableEncodedFrames(); | 99 EmitAvailableEncodedFrames(); |
110 } | 100 } |
111 | 101 |
112 void AudioReceiver::GetRawAudioFrame( | 102 void AudioReceiver::GetRawAudioFrame( |
113 const AudioFrameDecodedCallback& callback) { | 103 const AudioFrameDecodedCallback& callback) { |
114 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 104 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
115 DCHECK(!callback.is_null()); | 105 DCHECK(!callback.is_null()); |
116 DCHECK(audio_decoder_.get()); | 106 DCHECK(audio_decoder_.get()); |
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148 const AudioFrameDecodedCallback& callback, | 138 const AudioFrameDecodedCallback& callback, |
149 uint32 frame_id, | 139 uint32 frame_id, |
150 uint32 rtp_timestamp, | 140 uint32 rtp_timestamp, |
151 const base::TimeTicks& playout_time, | 141 const base::TimeTicks& playout_time, |
152 scoped_ptr<AudioBus> audio_bus, | 142 scoped_ptr<AudioBus> audio_bus, |
153 bool is_continuous) { | 143 bool is_continuous) { |
154 DCHECK(cast_environment->CurrentlyOn(CastEnvironment::MAIN)); | 144 DCHECK(cast_environment->CurrentlyOn(CastEnvironment::MAIN)); |
155 if (audio_bus.get()) { | 145 if (audio_bus.get()) { |
156 const base::TimeTicks now = cast_environment->Clock()->NowTicks(); | 146 const base::TimeTicks now = cast_environment->Clock()->NowTicks(); |
157 cast_environment->Logging()->InsertFrameEvent( | 147 cast_environment->Logging()->InsertFrameEvent( |
158 now, kAudioFrameDecoded, rtp_timestamp, frame_id); | 148 now, FRAME_DECODED, AUDIO_EVENT, rtp_timestamp, frame_id); |
159 cast_environment->Logging()->InsertFrameEventWithDelay( | 149 cast_environment->Logging()->InsertFrameEventWithDelay( |
160 now, kAudioPlayoutDelay, rtp_timestamp, frame_id, | 150 now, FRAME_PLAYOUT, AUDIO_EVENT, rtp_timestamp, frame_id, |
161 playout_time - now); | 151 playout_time - now); |
162 } | 152 } |
163 callback.Run(audio_bus.Pass(), playout_time, is_continuous); | 153 callback.Run(audio_bus.Pass(), playout_time, is_continuous); |
164 } | 154 } |
165 | 155 |
166 void AudioReceiver::GetEncodedAudioFrame( | 156 void AudioReceiver::GetEncodedAudioFrame( |
167 const AudioFrameEncodedCallback& callback) { | 157 const AudioFrameEncodedCallback& callback) { |
168 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 158 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
169 frame_request_queue_.push_back(callback); | 159 frame_request_queue_.push_back(callback); |
170 EmitAvailableEncodedFrames(); | 160 EmitAvailableEncodedFrames(); |
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259 target_delay_delta_ = target_delay; | 249 target_delay_delta_ = target_delay; |
260 rtcp_.SetTargetDelay(target_delay_delta_); | 250 rtcp_.SetTargetDelay(target_delay_delta_); |
261 } | 251 } |
262 | 252 |
263 void AudioReceiver::CastFeedback(const RtcpCastMessage& cast_message) { | 253 void AudioReceiver::CastFeedback(const RtcpCastMessage& cast_message) { |
264 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 254 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
265 base::TimeTicks now = cast_environment_->Clock()->NowTicks(); | 255 base::TimeTicks now = cast_environment_->Clock()->NowTicks(); |
266 RtpTimestamp rtp_timestamp = | 256 RtpTimestamp rtp_timestamp = |
267 frame_id_to_rtp_timestamp_[cast_message.ack_frame_id_ & 0xff]; | 257 frame_id_to_rtp_timestamp_[cast_message.ack_frame_id_ & 0xff]; |
268 cast_environment_->Logging()->InsertFrameEvent( | 258 cast_environment_->Logging()->InsertFrameEvent( |
269 now, kAudioAckSent, rtp_timestamp, cast_message.ack_frame_id_); | 259 now, FRAME_ACK_SENT, AUDIO_EVENT, rtp_timestamp, |
| 260 cast_message.ack_frame_id_); |
270 | 261 |
271 ReceiverRtcpEventSubscriber::RtcpEventMultiMap rtcp_events; | 262 ReceiverRtcpEventSubscriber::RtcpEventMultiMap rtcp_events; |
272 event_subscriber_.GetRtcpEventsAndReset(&rtcp_events); | 263 event_subscriber_.GetRtcpEventsAndReset(&rtcp_events); |
273 rtcp_.SendRtcpFromRtpReceiver(&cast_message, &rtcp_events); | 264 rtcp_.SendRtcpFromRtpReceiver(&cast_message, &rtcp_events); |
274 } | 265 } |
275 | 266 |
276 base::TimeTicks AudioReceiver::GetPlayoutTime(base::TimeTicks now, | 267 base::TimeTicks AudioReceiver::GetPlayoutTime(base::TimeTicks now, |
277 uint32 rtp_timestamp) { | 268 uint32 rtp_timestamp) { |
278 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 269 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
279 // Senders time in ms when this frame was recorded. | 270 // Senders time in ms when this frame was recorded. |
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373 } | 364 } |
374 | 365 |
375 void AudioReceiver::SendNextCastMessage() { | 366 void AudioReceiver::SendNextCastMessage() { |
376 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 367 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); |
377 framer_.SendCastMessage(); // Will only send a message if it is time. | 368 framer_.SendCastMessage(); // Will only send a message if it is time. |
378 ScheduleNextCastMessage(); | 369 ScheduleNextCastMessage(); |
379 } | 370 } |
380 | 371 |
381 } // namespace cast | 372 } // namespace cast |
382 } // namespace media | 373 } // namespace media |
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