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1 /* | 1 /* |
2 * Copyright (C) 2011, Google Inc. All rights reserved. | 2 * Copyright (C) 2011, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
(...skipping 28 matching lines...) Expand all Loading... | |
39 class OfflineAudioDestinationHandler final : public AudioDestinationHandler { | 39 class OfflineAudioDestinationHandler final : public AudioDestinationHandler { |
40 public: | 40 public: |
41 static PassRefPtr<OfflineAudioDestinationHandler> create(AudioNode&, AudioBu ffer* renderTarget); | 41 static PassRefPtr<OfflineAudioDestinationHandler> create(AudioNode&, AudioBu ffer* renderTarget); |
42 virtual ~OfflineAudioDestinationHandler(); | 42 virtual ~OfflineAudioDestinationHandler(); |
43 | 43 |
44 // AudioHandler | 44 // AudioHandler |
45 virtual void dispose() override; | 45 virtual void dispose() override; |
46 virtual void initialize() override; | 46 virtual void initialize() override; |
47 virtual void uninitialize() override; | 47 virtual void uninitialize() override; |
48 | 48 |
49 // AudioDestinationHandler | 49 // Override the one from AudioContext. Create a rendering thread and |
50 // initiate rendering loop or resume rendering if already started and | |
51 // suspended. | |
50 virtual void startRendering() override; | 52 virtual void startRendering() override; |
53 | |
54 // There is no support of the explicit stopping in OfflineAudioContext. This | |
55 // is just to match the class method signature. | |
51 virtual void stopRendering() override; | 56 virtual void stopRendering() override; |
52 | 57 |
53 virtual float sampleRate() const override { return m_renderTarget->sampleRa te(); } | 58 virtual float sampleRate() const override { return m_renderTarget->sampleRat e(); } |
59 | |
60 // Return the frame position by quantizing the time (in seconds) and | |
61 // rounding it down to the nearest block boundary. | |
Raymond Toy
2015/06/12 21:11:37
"block" -> "rendering quantum"
hongchan
2015/06/15 18:40:46
Done.
| |
62 size_t quantizeTimeToRenderQuantum(double when) const; | |
54 | 63 |
55 private: | 64 private: |
56 OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget); | 65 OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget); |
57 void offlineRender(); | 66 |
58 void offlineRenderInternal(); | 67 // For start/suspend/resume rendering in the destination node. |
68 void startOfflineRendering(); | |
69 void runOfflineRendering(); | |
70 void finishOfflineRendering(); | |
59 | 71 |
60 // For completion callback on main thread. | 72 // For completion callback on main thread. |
61 void notifyComplete(); | 73 void notifyComplete(); |
62 | 74 |
63 // This AudioHandler renders into this AudioBuffer. | 75 // This AudioHandler renders into this AudioBuffer. |
64 // This Persistent doesn't make a reference cycle including the owner | 76 // This Persistent doesn't make a reference cycle including the owner |
65 // OfflineAudioDestinationNode. | 77 // OfflineAudioDestinationNode. |
66 Persistent<AudioBuffer> m_renderTarget; | 78 Persistent<AudioBuffer> m_renderTarget; |
67 // Temporary AudioBus for each render quantum. | 79 // Temporary AudioBus for each render quantum. |
68 RefPtr<AudioBus> m_renderBus; | 80 RefPtr<AudioBus> m_renderBus; |
69 | 81 |
70 // Rendering thread. | 82 // Rendering thread. |
71 OwnPtr<WebThread> m_renderThread; | 83 OwnPtr<WebThread> m_renderThread; |
72 bool m_startedRendering; | 84 |
85 size_t m_framesProcessed; | |
86 size_t m_framesToProcess; | |
73 }; | 87 }; |
74 | 88 |
75 class OfflineAudioDestinationNode final : public AudioDestinationNode { | 89 class OfflineAudioDestinationNode final : public AudioDestinationNode { |
76 public: | 90 public: |
77 static OfflineAudioDestinationNode* create(AudioContext*, AudioBuffer* rende rTarget); | 91 static OfflineAudioDestinationNode* create(AudioContext*, AudioBuffer* rende rTarget); |
78 | 92 |
79 private: | 93 private: |
80 OfflineAudioDestinationNode(AudioContext&, AudioBuffer* renderTarget); | 94 OfflineAudioDestinationNode(AudioContext&, AudioBuffer* renderTarget); |
81 }; | 95 }; |
82 | 96 |
83 } // namespace blink | 97 } // namespace blink |
84 | 98 |
85 #endif // OfflineAudioDestinationNode_h | 99 #endif // OfflineAudioDestinationNode_h |
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