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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_RENDERER_WEBAUDIODEVICE_IMPL_H_ | 5 #ifndef CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_ |
6 #define CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_ | 6 #define CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include "base/cancelable_callback.h" | 10 #include "base/cancelable_callback.h" |
11 #include "base/macros.h" | 11 #include "base/macros.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "base/threading/thread_checker.h" | 13 #include "base/threading/thread_checker.h" |
14 #include "media/base/audio_parameters.h" | 14 #include "media/base/audio_parameters.h" |
15 #include "media/base/audio_renderer_sink.h" | 15 #include "media/base/audio_renderer_sink.h" |
16 #include "third_party/WebKit/public/platform/WebAudioDevice.h" | 16 #include "third_party/WebKit/public/platform/WebAudioDevice.h" |
17 #include "third_party/WebKit/public/platform/WebVector.h" | 17 #include "third_party/WebKit/public/platform/WebVector.h" |
18 #include "url/origin.h" | 18 #include "url/origin.h" |
19 | 19 |
20 namespace base { | 20 namespace base { |
21 class SingleThreadTaskRunner; | 21 class SingleThreadTaskRunner; |
22 } | 22 } |
23 | 23 |
24 namespace media { | 24 namespace media { |
25 class NullAudioSink; | 25 class NullAudioSink; |
| 26 class AudioPullFifo; |
26 } | 27 } |
27 | 28 |
28 namespace content { | 29 namespace content { |
29 | 30 |
30 class RendererWebAudioDeviceImpl | 31 class RendererWebAudioDeviceImpl |
31 : public blink::WebAudioDevice, | 32 : public blink::WebAudioDevice, |
32 public media::AudioRendererSink::RenderCallback { | 33 public media::AudioRendererSink::RenderCallback { |
33 public: | 34 public: |
34 RendererWebAudioDeviceImpl(const media::AudioParameters& params, | 35 RendererWebAudioDeviceImpl(const media::AudioParameters& params, |
35 blink::WebAudioDevice::RenderCallback* callback, | 36 blink::WebAudioDevice::RenderCallback* callback, |
36 int session_id, | 37 int session_id, |
37 const url::Origin& security_origin); | 38 const url::Origin& security_origin); |
38 ~RendererWebAudioDeviceImpl() override; | 39 ~RendererWebAudioDeviceImpl() override; |
39 | 40 |
40 // blink::WebAudioDevice implementation. | 41 // blink::WebAudioDevice implementation. |
41 void start() override; | 42 void start() override; |
42 void stop() override; | 43 void stop() override; |
43 double sampleRate() override; | 44 double sampleRate() override; |
44 | 45 |
45 // AudioRendererSink::RenderCallback implementation. | 46 // AudioRendererSink::RenderCallback implementation. |
46 int Render(media::AudioBus* dest, | 47 int Render(media::AudioBus* dest, |
47 uint32_t frames_delayed, | 48 uint32_t frames_delayed, |
48 uint32_t frames_skipped) override; | 49 uint32_t frames_skipped) override; |
49 | 50 |
50 void OnRenderError() override; | 51 void OnRenderError() override; |
51 | 52 |
52 private: | 53 private: |
53 const media::AudioParameters params_; | 54 // Called by AudioPullFifo when more data is necessary. |
| 55 void SourceCallback(int fifo_frames_delay, media::AudioBus* audio_bus); |
| 56 |
| 57 // Creates a FIFO to rebuffer audio between the client and the sink. |
| 58 void CreateFifoIfRequired(int render_frames_per_buffer); |
| 59 |
| 60 // Parameters of audio being pulled from the client. |
| 61 const media::AudioParameters client_params_; |
54 | 62 |
55 // Weak reference to the callback into WebKit code. | 63 // Weak reference to the callback into WebKit code. |
56 blink::WebAudioDevice::RenderCallback* const client_callback_; | 64 blink::WebAudioDevice::RenderCallback* const client_callback_; |
57 | 65 |
58 // To avoid the need for locking, ensure the control methods of the | 66 // To avoid the need for locking, ensure the control methods of the |
59 // blink::WebAudioDevice implementation are called on the same thread. | 67 // blink::WebAudioDevice implementation are called on the same thread. |
60 base::ThreadChecker thread_checker_; | 68 base::ThreadChecker thread_checker_; |
61 | 69 |
62 // When non-NULL, we are started. When NULL, we are stopped. | 70 // When non-NULL, we are started. When NULL, we are stopped. |
63 scoped_refptr<media::AudioRendererSink> sink_; | 71 scoped_refptr<media::AudioRendererSink> sink_; |
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85 | 93 |
86 bool is_first_buffer_after_silence_; | 94 bool is_first_buffer_after_silence_; |
87 | 95 |
88 // A cancelable task that is posted to start the |null_audio_sink_| after a | 96 // A cancelable task that is posted to start the |null_audio_sink_| after a |
89 // period of silence. We do this on android to save battery consumption. | 97 // period of silence. We do this on android to save battery consumption. |
90 base::CancelableClosure start_null_audio_sink_callback_; | 98 base::CancelableClosure start_null_audio_sink_callback_; |
91 | 99 |
92 // Security origin, used to check permissions for |output_device_|. | 100 // Security origin, used to check permissions for |output_device_|. |
93 url::Origin security_origin_; | 101 url::Origin security_origin_; |
94 | 102 |
| 103 // Used to buffer data between the client and the sink in cases where |
| 104 // the client buffer size is not the same as rendering buffer size. |
| 105 std::unique_ptr<media::AudioPullFifo> audio_fifo_; |
| 106 |
95 DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl); | 107 DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl); |
96 }; | 108 }; |
97 | 109 |
98 } // namespace content | 110 } // namespace content |
99 | 111 |
100 #endif // CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_ | 112 #endif // CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_ |
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