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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_ | 5 #ifndef CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_ |
6 #define CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_ | 6 #define CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
11 #include <vector> | 11 #include <vector> |
12 | 12 |
13 #include "base/callback.h" | 13 #include "base/callback.h" |
14 #include "base/macros.h" | 14 #include "base/macros.h" |
15 #include "base/memory/ref_counted.h" | 15 #include "base/memory/ref_counted.h" |
16 #include "base/single_thread_task_runner.h" | 16 #include "base/single_thread_task_runner.h" |
17 #include "base/synchronization/lock.h" | 17 #include "base/synchronization/lock.h" |
18 #include "base/threading/thread_checker.h" | 18 #include "base/threading/thread_checker.h" |
19 #include "content/common/content_export.h" | 19 #include "content/common/content_export.h" |
20 #include "content/public/renderer/media_stream_audio_renderer.h" | 20 #include "content/public/renderer/media_stream_audio_renderer.h" |
21 #include "content/public/renderer/media_stream_audio_sink.h" | 21 #include "content/public/renderer/media_stream_audio_sink.h" |
22 #include "media/base/audio_renderer_sink.h" | 22 #include "media/base/audio_renderer_sink.h" |
23 #include "media/base/output_device.h" | |
24 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h" | 23 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h" |
25 | 24 |
26 namespace media { | 25 namespace media { |
27 class AudioBus; | 26 class AudioBus; |
28 class AudioShifter; | 27 class AudioShifter; |
29 class AudioParameters; | 28 class AudioParameters; |
30 } | 29 } |
31 | 30 |
32 namespace content { | 31 namespace content { |
33 | 32 |
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46 // Audio data is feed-in from the source via calls to OnData(). The | 45 // Audio data is feed-in from the source via calls to OnData(). The |
47 // internally-owned media::AudioOutputDevice calls Render() to pull-out that | 46 // internally-owned media::AudioOutputDevice calls Render() to pull-out that |
48 // audio data. However, because of clock differences and other environmental | 47 // audio data. However, because of clock differences and other environmental |
49 // factors, the audio will inevitably feed-in at a rate different from the rate | 48 // factors, the audio will inevitably feed-in at a rate different from the rate |
50 // it is being rendered-out. media::AudioShifter is used to buffer, stretch | 49 // it is being rendered-out. media::AudioShifter is used to buffer, stretch |
51 // and skip audio to maintain time synchronization between the producer and | 50 // and skip audio to maintain time synchronization between the producer and |
52 // consumer. | 51 // consumer. |
53 class CONTENT_EXPORT TrackAudioRenderer | 52 class CONTENT_EXPORT TrackAudioRenderer |
54 : NON_EXPORTED_BASE(public MediaStreamAudioRenderer), | 53 : NON_EXPORTED_BASE(public MediaStreamAudioRenderer), |
55 NON_EXPORTED_BASE(public MediaStreamAudioSink), | 54 NON_EXPORTED_BASE(public MediaStreamAudioSink), |
56 NON_EXPORTED_BASE(public media::AudioRendererSink::RenderCallback), | 55 NON_EXPORTED_BASE(public media::AudioRendererSink::RenderCallback) { |
57 NON_EXPORTED_BASE(public media::OutputDevice) { | |
58 public: | 56 public: |
59 // Creates a renderer for the given |audio_track|. |playout_render_frame_id| | 57 // Creates a renderer for the given |audio_track|. |playout_render_frame_id| |
60 // refers to the RenderFrame that owns this instance (e.g., it contains the | 58 // refers to the RenderFrame that owns this instance (e.g., it contains the |
61 // DOM widget representing the player). |session_id| and |device_id| are | 59 // DOM widget representing the player). |session_id| and |device_id| are |
62 // optional, and are used to direct audio output to a pre-selected device; | 60 // optional, and are used to direct audio output to a pre-selected device; |
63 // otherwise, audio is output to the default device for the system. | 61 // otherwise, audio is output to the default device for the system. |
64 // | 62 // |
65 // Called on the main thread. | 63 // Called on the main thread. |
66 TrackAudioRenderer(const blink::WebMediaStreamTrack& audio_track, | 64 TrackAudioRenderer(const blink::WebMediaStreamTrack& audio_track, |
67 int playout_render_frame_id, | 65 int playout_render_frame_id, |
68 int session_id, | 66 int session_id, |
69 const std::string& device_id, | 67 const std::string& device_id, |
70 const url::Origin& security_origin); | 68 const url::Origin& security_origin); |
71 | 69 |
72 // MediaStreamAudioRenderer implementation. | 70 // MediaStreamAudioRenderer implementation. |
73 // Called on the main thread. | 71 // Called on the main thread. |
74 void Start() override; | 72 void Start() override; |
75 void Stop() override; | 73 void Stop() override; |
76 void Play() override; | 74 void Play() override; |
77 void Pause() override; | 75 void Pause() override; |
78 void SetVolume(float volume) override; | 76 void SetVolume(float volume) override; |
79 media::OutputDevice* GetOutputDevice() override; | 77 media::OutputDeviceInfo GetOutputDeviceInfo() override; |
80 base::TimeDelta GetCurrentRenderTime() const override; | 78 base::TimeDelta GetCurrentRenderTime() const override; |
81 bool IsLocalRenderer() const override; | 79 bool IsLocalRenderer() const override; |
82 | |
83 // media::OutputDevice implementation | |
84 void SwitchOutputDevice(const std::string& device_id, | 80 void SwitchOutputDevice(const std::string& device_id, |
85 const url::Origin& security_origin, | 81 const url::Origin& security_origin, |
86 const media::SwitchOutputDeviceCB& callback) override; | 82 const media::OutputDeviceStatusCB& callback) override; |
87 media::AudioParameters GetOutputParameters() override; | |
88 media::OutputDeviceStatus GetDeviceStatus() override; | |
89 | 83 |
90 protected: | 84 protected: |
91 ~TrackAudioRenderer() override; | 85 ~TrackAudioRenderer() override; |
92 | 86 |
93 private: | 87 private: |
94 // MediaStreamAudioSink implementation. | 88 // MediaStreamAudioSink implementation. |
95 | 89 |
96 // Called on the AudioInputDevice worker thread. | 90 // Called on the AudioInputDevice worker thread. |
97 void OnData(const media::AudioBus& audio_bus, | 91 void OnData(const media::AudioBus& audio_bus, |
98 base::TimeTicks reference_time) override; | 92 base::TimeTicks reference_time) override; |
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179 | 173 |
180 // Used to DCHECK that some methods are called on the audio thread. | 174 // Used to DCHECK that some methods are called on the audio thread. |
181 base::ThreadChecker audio_thread_checker_; | 175 base::ThreadChecker audio_thread_checker_; |
182 | 176 |
183 DISALLOW_COPY_AND_ASSIGN(TrackAudioRenderer); | 177 DISALLOW_COPY_AND_ASSIGN(TrackAudioRenderer); |
184 }; | 178 }; |
185 | 179 |
186 } // namespace content | 180 } // namespace content |
187 | 181 |
188 #endif // CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_ | 182 #endif // CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_ |
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