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Side by Side Diff: media/cast/sender/audio_sender.h

Issue 388663003: Cast: Reshuffle files under media/cast (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: missing includes Created 6 years, 5 months ago
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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 #ifndef MEDIA_CAST_AUDIO_SENDER_H_ 5 #ifndef MEDIA_CAST_SENDER_AUDIO_SENDER_H_
6 #define MEDIA_CAST_AUDIO_SENDER_H_ 6 #define MEDIA_CAST_SENDER_AUDIO_SENDER_H_
7 7
8 #include "base/callback.h" 8 #include "base/callback.h"
9 #include "base/memory/ref_counted.h" 9 #include "base/memory/ref_counted.h"
10 #include "base/memory/scoped_ptr.h" 10 #include "base/memory/scoped_ptr.h"
11 #include "base/memory/weak_ptr.h" 11 #include "base/memory/weak_ptr.h"
12 #include "base/threading/non_thread_safe.h" 12 #include "base/threading/non_thread_safe.h"
13 #include "base/time/tick_clock.h" 13 #include "base/time/tick_clock.h"
14 #include "base/time/time.h" 14 #include "base/time/time.h"
15 #include "media/base/audio_bus.h" 15 #include "media/base/audio_bus.h"
16 #include "media/cast/cast_config.h" 16 #include "media/cast/cast_config.h"
17 #include "media/cast/cast_environment.h" 17 #include "media/cast/cast_environment.h"
18 #include "media/cast/logging/logging_defines.h" 18 #include "media/cast/logging/logging_defines.h"
19 #include "media/cast/rtcp/rtcp.h" 19 #include "media/cast/net/rtcp/rtcp.h"
20 #include "media/cast/rtp_timestamp_helper.h" 20 #include "media/cast/sender/rtp_timestamp_helper.h"
21 21
22 namespace media { 22 namespace media {
23 namespace cast { 23 namespace cast {
24 24
25 class AudioEncoder; 25 class AudioEncoder;
26 26
27 // Not thread safe. Only called from the main cast thread. 27 // Not thread safe. Only called from the main cast thread.
28 // This class owns all objects related to sending audio, objects that create RTP 28 // This class owns all objects related to sending audio, objects that create RTP
29 // packets, congestion control, audio encoder, parsing and sending of 29 // packets, congestion control, audio encoder, parsing and sending of
30 // RTCP packets. 30 // RTCP packets.
31 // Additionally it posts a bunch of delayed tasks to the main thread for various 31 // Additionally it posts a bunch of delayed tasks to the main thread for various
32 // timeouts. 32 // timeouts.
33 class AudioSender : public RtcpSenderFeedback, 33 class AudioSender : public RtcpSenderFeedback,
34 public base::NonThreadSafe, 34 public base::NonThreadSafe,
35 public base::SupportsWeakPtr<AudioSender> { 35 public base::SupportsWeakPtr<AudioSender> {
36 public: 36 public:
37 AudioSender(scoped_refptr<CastEnvironment> cast_environment, 37 AudioSender(scoped_refptr<CastEnvironment> cast_environment,
38 const AudioSenderConfig& audio_config, 38 const AudioSenderConfig& audio_config,
39 transport::CastTransportSender* const transport_sender); 39 CastTransportSender* const transport_sender);
40 40
41 virtual ~AudioSender(); 41 virtual ~AudioSender();
42 42
43 CastInitializationStatus InitializationResult() const { 43 CastInitializationStatus InitializationResult() const {
44 return cast_initialization_status_; 44 return cast_initialization_status_;
45 } 45 }
46 46
47 // Note: It is not guaranteed that |audio_frame| will actually be encoded and 47 // Note: It is not guaranteed that |audio_frame| will actually be encoded and
48 // sent, if AudioSender detects too many frames in flight. Therefore, clients 48 // sent, if AudioSender detects too many frames in flight. Therefore, clients
49 // should be careful about the rate at which this method is called. 49 // should be careful about the rate at which this method is called.
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75 void ResendCheck(); 75 void ResendCheck();
76 void ResendForKickstart(); 76 void ResendForKickstart();
77 77
78 // Returns true if there are too many frames in flight, as defined by the 78 // Returns true if there are too many frames in flight, as defined by the
79 // configured target playout delay plus simple logic. When this is true, 79 // configured target playout delay plus simple logic. When this is true,
80 // InsertAudio() will silenty drop frames instead of sending them to the audio 80 // InsertAudio() will silenty drop frames instead of sending them to the audio
81 // encoder. 81 // encoder.
82 bool AreTooManyFramesInFlight() const; 82 bool AreTooManyFramesInFlight() const;
83 83
84 // Called by the |audio_encoder_| with the next EncodedFrame to send. 84 // Called by the |audio_encoder_| with the next EncodedFrame to send.
85 void SendEncodedAudioFrame(scoped_ptr<transport::EncodedFrame> audio_frame); 85 void SendEncodedAudioFrame(scoped_ptr<EncodedFrame> audio_frame);
86 86
87 const scoped_refptr<CastEnvironment> cast_environment_; 87 const scoped_refptr<CastEnvironment> cast_environment_;
88 88
89 // The total amount of time between a frame's capture/recording on the sender 89 // The total amount of time between a frame's capture/recording on the sender
90 // and its playback on the receiver (i.e., shown to a user). This is fixed as 90 // and its playback on the receiver (i.e., shown to a user). This is fixed as
91 // a value large enough to give the system sufficient time to encode, 91 // a value large enough to give the system sufficient time to encode,
92 // transmit/retransmit, receive, decode, and render; given its run-time 92 // transmit/retransmit, receive, decode, and render; given its run-time
93 // environment (sender/receiver hardware performance, network conditions, 93 // environment (sender/receiver hardware performance, network conditions,
94 // etc.). 94 // etc.).
95 const base::TimeDelta target_playout_delay_; 95 const base::TimeDelta target_playout_delay_;
96 96
97 // Sends encoded frames over the configured transport (e.g., UDP). In 97 // Sends encoded frames over the configured transport (e.g., UDP). In
98 // Chromium, this could be a proxy that first sends the frames from a renderer 98 // Chromium, this could be a proxy that first sends the frames from a renderer
99 // process to the browser process over IPC, with the browser process being 99 // process to the browser process over IPC, with the browser process being
100 // responsible for "packetizing" the frames and pushing packets into the 100 // responsible for "packetizing" the frames and pushing packets into the
101 // network layer. 101 // network layer.
102 transport::CastTransportSender* const transport_sender_; 102 CastTransportSender* const transport_sender_;
103 103
104 // Maximum number of outstanding frames before the encoding and sending of 104 // Maximum number of outstanding frames before the encoding and sending of
105 // new frames shall halt. 105 // new frames shall halt.
106 const int max_unacked_frames_; 106 const int max_unacked_frames_;
107 107
108 // Encodes AudioBuses into EncodedFrames. 108 // Encodes AudioBuses into EncodedFrames.
109 scoped_ptr<AudioEncoder> audio_encoder_; 109 scoped_ptr<AudioEncoder> audio_encoder_;
110 const int configured_encoder_bitrate_; 110 const int configured_encoder_bitrate_;
111 111
112 // Manages sending/receiving of RTCP packets, including sender/receiver 112 // Manages sending/receiving of RTCP packets, including sender/receiver
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152 152
153 // NOTE: Weak pointers must be invalidated before all other member variables. 153 // NOTE: Weak pointers must be invalidated before all other member variables.
154 base::WeakPtrFactory<AudioSender> weak_factory_; 154 base::WeakPtrFactory<AudioSender> weak_factory_;
155 155
156 DISALLOW_COPY_AND_ASSIGN(AudioSender); 156 DISALLOW_COPY_AND_ASSIGN(AudioSender);
157 }; 157 };
158 158
159 } // namespace cast 159 } // namespace cast
160 } // namespace media 160 } // namespace media
161 161
162 #endif // MEDIA_CAST_AUDIO_SENDER_H_ 162 #endif // MEDIA_CAST_SENDER_AUDIO_SENDER_H_
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