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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 |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN Y | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN Y |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN Y | 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN Y |
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O N | 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O N |
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
23 */ | 23 */ |
24 | 24 |
25 #ifndef OfflineAudioDestinationNode_h | 25 #ifndef OfflineAudioDestinationNode_h |
26 #define OfflineAudioDestinationNode_h | 26 #define OfflineAudioDestinationNode_h |
27 | 27 |
28 #include "modules/webaudio/AudioBuffer.h" | 28 #include "modules/webaudio/AudioBuffer.h" |
29 #include "modules/webaudio/AudioDestinationNode.h" | 29 #include "modules/webaudio/AudioDestinationNode.h" |
30 #include "modules/webaudio/OfflineAudioContext.h" | |
30 #include "public/platform/WebThread.h" | 31 #include "public/platform/WebThread.h" |
31 #include "wtf/PassRefPtr.h" | 32 #include "wtf/PassRefPtr.h" |
32 #include "wtf/RefPtr.h" | 33 #include "wtf/RefPtr.h" |
33 | 34 |
34 namespace blink { | 35 namespace blink { |
35 | 36 |
36 class AbstractAudioContext; | 37 class AbstractAudioContext; |
37 class AudioBus; | 38 class AudioBus; |
39 class OfflineAudioContext; | |
38 | 40 |
39 class OfflineAudioDestinationHandler final : public AudioDestinationHandler { | 41 class OfflineAudioDestinationHandler final : public AudioDestinationHandler { |
40 public: | 42 public: |
41 static PassRefPtr<OfflineAudioDestinationHandler> create(AudioNode&, AudioBu ffer* renderTarget); | 43 static PassRefPtr<OfflineAudioDestinationHandler> create(AudioNode&, AudioBu ffer* renderTarget); |
42 ~OfflineAudioDestinationHandler() override; | 44 ~OfflineAudioDestinationHandler() override; |
43 | 45 |
44 // AudioHandler | 46 // AudioHandler |
45 void dispose() override; | 47 void dispose() override; |
46 void initialize() override; | 48 void initialize() override; |
47 void uninitialize() override; | 49 void uninitialize() override; |
48 | 50 |
51 OfflineAudioContext* context() const final; | |
52 | |
49 // AudioDestinationHandler | 53 // AudioDestinationHandler |
50 void startRendering() override; | 54 void startRendering() override; |
51 void stopRendering() override; | 55 void stopRendering() override; |
52 | 56 |
53 float sampleRate() const override { return m_renderTarget->sampleRate(); } | 57 float sampleRate() const override { return m_renderTarget->sampleRate(); } |
54 | 58 |
59 size_t renderQuantumFrames() const; | |
60 | |
61 WebThread* offlineRenderThread(); | |
62 | |
55 private: | 63 private: |
56 OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget); | 64 OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget); |
57 void offlineRender(); | |
58 void offlineRenderInternal(); | |
59 | 65 |
60 // For completion callback on main thread. | 66 // Set up the rendering and start. After setting the context up, it will |
67 // eventually call |doOfflineRendering|. | |
68 void startOfflineRendering(); | |
69 | |
70 // Suspend the rendering loop and notify the main thread to resolve the | |
71 // associated promise. | |
72 void suspendOfflineRendering(); | |
73 | |
74 // Start the rendering loop. | |
75 void doOfflineRendering(); | |
76 | |
77 // Finish the rendering loop and notify the main thread to resolve the | |
78 // promise with the rendered buffer. | |
79 void finishOfflineRendering(); | |
80 | |
81 // Suspend/completion callbacks for the main thread. | |
82 void notifySuspend(); | |
61 void notifyComplete(); | 83 void notifyComplete(); |
62 | 84 |
85 // The offline version of render() method. virtual/override were not used | |
Raymond Toy
2015/10/21 18:22:46
How is virtual/override relevant? Could another c
hongchan
2015/10/22 18:23:49
I thought about overriding render() method - but I
| |
86 // for this method to ensure the optimum performance. | |
87 // If the rendering needs to be suspended after checking, this stops the | |
88 // rendering and returns true. Otherwise, it returns false after completing | |
89 // the render quantum. | |
90 bool checkSuspendsAndRender(AudioBus* sourceBus, AudioBus* destinationBus, s ize_t numberOfFrames); | |
91 | |
63 // This AudioHandler renders into this AudioBuffer. | 92 // This AudioHandler renders into this AudioBuffer. |
64 // This Persistent doesn't make a reference cycle including the owner | 93 // This Persistent doesn't make a reference cycle including the owner |
65 // OfflineAudioDestinationNode. | 94 // OfflineAudioDestinationNode. |
66 Persistent<AudioBuffer> m_renderTarget; | 95 Persistent<AudioBuffer> m_renderTarget; |
67 // Temporary AudioBus for each render quantum. | 96 // Temporary AudioBus for each render quantum. |
68 RefPtr<AudioBus> m_renderBus; | 97 RefPtr<AudioBus> m_renderBus; |
69 | 98 |
70 // Rendering thread. | 99 // Rendering thread. |
71 OwnPtr<WebThread> m_renderThread; | 100 OwnPtr<WebThread> m_renderThread; |
72 bool m_startedRendering; | 101 |
102 // These variables are for counting the number of frames for the current | |
103 // progress and the remaining frames to be processed. | |
104 size_t m_framesProcessed; | |
105 size_t m_framesToProcess; | |
106 | |
107 // This flag is necessary to distinguish the state of the context between | |
108 // 'created' and 'suspended'. If this flag is false and the current state | |
109 // is 'suspended', it means the context is created and have not started yet. | |
110 bool m_isRenderingStarted; | |
111 | |
112 // This flag indicates whether the rendering should be suspended or not. | |
113 bool m_shouldSuspend; | |
73 }; | 114 }; |
74 | 115 |
75 class OfflineAudioDestinationNode final : public AudioDestinationNode { | 116 class OfflineAudioDestinationNode final : public AudioDestinationNode { |
76 public: | 117 public: |
77 static OfflineAudioDestinationNode* create(AbstractAudioContext*, AudioBuffe r* renderTarget); | 118 static OfflineAudioDestinationNode* create(AbstractAudioContext*, AudioBuffe r* renderTarget); |
78 | 119 |
79 private: | 120 private: |
80 OfflineAudioDestinationNode(AbstractAudioContext&, AudioBuffer* renderTarget ); | 121 OfflineAudioDestinationNode(AbstractAudioContext&, AudioBuffer* renderTarget ); |
81 }; | 122 }; |
82 | 123 |
83 } // namespace blink | 124 } // namespace blink |
84 | 125 |
85 #endif // OfflineAudioDestinationNode_h | 126 #endif // OfflineAudioDestinationNode_h |
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