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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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_MEDIA_INTERFACE_PROVIDER_H_ | 5 #ifndef CONTENT_RENDERER_MEDIA_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
6 #define CONTENT_RENDERER_MEDIA_MEDIA_INTERFACE_PROVIDER_H_ | 6 #define CONTENT_RENDERER_MEDIA_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "content/renderer/media/media_stream_audio_source.h" |
9 #include "base/macros.h" | 9 |
10 #include "base/threading/thread_checker.h" | 10 #include "media/base/audio_capturer_source.h" |
11 #include "content/common/content_export.h" | |
12 #include "media/mojo/interfaces/service_factory.mojom.h" | |
13 #include "services/shell/public/interfaces/interface_provider.mojom.h" | |
14 #include "url/gurl.h" | |
15 | 11 |
16 namespace content { | 12 namespace content { |
17 | 13 |
18 // MediaInterfaceProvider is an implementation of mojo InterfaceProvider that | 14 // Represents an externally-provided local or remote source of audio data. This |
perkj_chrome
2016/04/20 13:34:53
nit- remove extra space
miu
2016/04/20 22:04:52
Done.
| |
19 // provides media related services and handles app disconnection automatically. | 15 // allows users of the public content::MediaStreamApi to provide a |
20 // This class is single threaded. | 16 // media::AudioCapturerSource to be used as the source of audio data in the |
21 class CONTENT_EXPORT MediaInterfaceProvider | 17 // MediaStream framework. Audio data is transported directly to the tracks |
22 : public shell::mojom::InterfaceProvider { | 18 // (i.e., there is no audio processing). |
19 class CONTENT_EXPORT ExternalMediaStreamAudioSource final | |
20 : NON_EXPORTED_BASE(public MediaStreamAudioSource), | |
21 NON_EXPORTED_BASE(public media::AudioCapturerSource::CaptureCallback) { | |
23 public: | 22 public: |
24 // Callback used to connect to a mojo application. | 23 ExternalMediaStreamAudioSource( |
25 using ConnectToApplicationCB = | 24 scoped_refptr<media::AudioCapturerSource> source, |
26 base::Callback<shell::mojom::InterfaceProviderPtr(const GURL& url)>; | 25 int sample_rate, |
26 media::ChannelLayout channel_layout, | |
27 int frames_per_buffer, | |
28 bool is_remote); | |
27 | 29 |
28 explicit MediaInterfaceProvider( | 30 ~ExternalMediaStreamAudioSource() final; |
29 const ConnectToApplicationCB& connect_to_app_cb); | |
30 ~MediaInterfaceProvider() final; | |
31 | |
32 // InterfaceProvider implementation. | |
33 void GetInterface(const mojo::String& interface_name, | |
34 mojo::ScopedMessagePipeHandle pipe) final; | |
35 | 31 |
36 private: | 32 private: |
37 media::interfaces::ServiceFactory* GetMediaServiceFactory(); | 33 // MediaStreamAudioSource implementation. |
38 void OnConnectionError(); | 34 bool EnsureSourceIsStarted() final; |
35 void EnsureSourceIsStopped() final; | |
39 | 36 |
37 // media::AudioCapturerSource::CaptureCallback implementation. | |
38 void Capture(const media::AudioBus* audio_bus, | |
39 int audio_delay_milliseconds, | |
40 double volume, | |
41 bool key_pressed) final; | |
42 void OnCaptureError(const std::string& message) final; | |
43 | |
44 // The external source provided to the constructor. | |
45 scoped_refptr<media::AudioCapturerSource> source_; | |
46 | |
47 // In debug builds, check that all methods that could cause object graph | |
48 // or data flow changes are being called on the main thread. | |
40 base::ThreadChecker thread_checker_; | 49 base::ThreadChecker thread_checker_; |
41 ConnectToApplicationCB connect_to_app_cb_; | |
42 media::interfaces::ServiceFactoryPtr media_service_factory_; | |
43 | 50 |
44 DISALLOW_COPY_AND_ASSIGN(MediaInterfaceProvider); | 51 // True once the source has been started successfully. |
52 bool was_started_; | |
53 | |
54 DISALLOW_COPY_AND_ASSIGN(ExternalMediaStreamAudioSource); | |
45 }; | 55 }; |
46 | 56 |
47 } // namespace content | 57 } // namespace content |
48 | 58 |
49 #endif // CONTENT_RENDERER_MEDIA_MEDIA_INTERFACE_PROVIDER_H_ | 59 #endif // CONTENT_RENDERER_MEDIA_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
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