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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010, Google Inc. All rights reserved. | 2 * Copyright (C) 2010, 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 |
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| 31 #include "wtf/HashSet.h" | 31 #include "wtf/HashSet.h" |
| 32 #include "wtf/RefPtr.h" | 32 #include "wtf/RefPtr.h" |
| 33 | 33 |
| 34 namespace blink { | 34 namespace blink { |
| 35 | 35 |
| 36 class AudioContext; | 36 class AudioContext; |
| 37 class AudioNodeInput; | 37 class AudioNodeInput; |
| 38 | 38 |
| 39 // AudioNodeOutput represents a single output for an AudioNode. | 39 // AudioNodeOutput represents a single output for an AudioNode. |
| 40 // It may be connected to one or more AudioNodeInputs. | 40 // It may be connected to one or more AudioNodeInputs. |
| 41 class AudioNodeOutput : public NoBaseWillBeGarbageCollectedFinalized<AudioNodeOu tput> { | 41 class AudioNodeOutput : public GarbageCollectedFinalized<AudioNodeOutput> { |
| 42 public: | 42 public: |
| 43 // It's OK to pass 0 for numberOfChannels in which case | 43 // It's OK to pass 0 for numberOfChannels in which case |
| 44 // setNumberOfChannels() must be called later on. | 44 // setNumberOfChannels() must be called later on. |
| 45 static PassOwnPtrWillBeRawPtr<AudioNodeOutput> create(AudioNode*, unsigned n umberOfChannels); | 45 static AudioNodeOutput* create(AudioNode*, unsigned numberOfChannels); |
| 46 void trace(Visitor*); | 46 void trace(Visitor*); |
| 47 | 47 |
| 48 // Can be called from any thread. | 48 // Can be called from any thread. |
| 49 AudioNode* node() const { return m_node; } | 49 AudioNode* node() const { return m_node; } |
| 50 AudioContext* context() { return m_node->context(); } | 50 AudioContext* context() { return m_node->context(); } |
| 51 | 51 |
| 52 // Causes our AudioNode to process if it hasn't already for this render quan tum. | 52 // Causes our AudioNode to process if it hasn't already for this render quan tum. |
| 53 // It returns the bus containing the processed audio for this output, return ing inPlaceBus if in-place processing was possible. | 53 // It returns the bus containing the processed audio for this output, return ing inPlaceBus if in-place processing was possible. |
| 54 // Called from context's audio thread. | 54 // Called from context's audio thread. |
| 55 AudioBus* pull(AudioBus* inPlaceBus, size_t framesToProcess); | 55 AudioBus* pull(AudioBus* inPlaceBus, size_t framesToProcess); |
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| 77 void disable(); | 77 void disable(); |
| 78 void enable(); | 78 void enable(); |
| 79 | 79 |
| 80 // updateRenderingState() is called in the audio thread at the start or end of the render quantum to handle any recent changes to the graph state. | 80 // updateRenderingState() is called in the audio thread at the start or end of the render quantum to handle any recent changes to the graph state. |
| 81 // It must be called with the context's graph lock. | 81 // It must be called with the context's graph lock. |
| 82 void updateRenderingState(); | 82 void updateRenderingState(); |
| 83 | 83 |
| 84 private: | 84 private: |
| 85 AudioNodeOutput(AudioNode*, unsigned numberOfChannels); | 85 AudioNodeOutput(AudioNode*, unsigned numberOfChannels); |
| 86 | 86 |
| 87 RawPtrWillBeMember<AudioNode> m_node; | 87 Member<AudioNode> m_node; |
| 88 | 88 |
| 89 friend class AudioNodeInput; | 89 friend class AudioNodeInput; |
| 90 friend class AudioParam; | 90 friend class AudioParam; |
| 91 | 91 |
| 92 // These are called from AudioNodeInput. | 92 // These are called from AudioNodeInput. |
| 93 // They must be called with the context's graph lock. | 93 // They must be called with the context's graph lock. |
| 94 void addInput(AudioNodeInput&); | 94 void addInput(AudioNodeInput&); |
| 95 void removeInput(AudioNodeInput&); | 95 void removeInput(AudioNodeInput&); |
| 96 void addParam(AudioParam&); | 96 void addParam(AudioParam&); |
| 97 void removeParam(AudioParam&); | 97 void removeParam(AudioParam&); |
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| 126 // The main thread sets m_desiredNumberOfChannels which will later get picke d up in the audio thread in updateNumberOfChannels(). | 126 // The main thread sets m_desiredNumberOfChannels which will later get picke d up in the audio thread in updateNumberOfChannels(). |
| 127 unsigned m_numberOfChannels; | 127 unsigned m_numberOfChannels; |
| 128 unsigned m_desiredNumberOfChannels; | 128 unsigned m_desiredNumberOfChannels; |
| 129 | 129 |
| 130 // m_internalBus and m_inPlaceBus must only be changed in the audio thread w ith the context's graph lock (or constructor). | 130 // m_internalBus and m_inPlaceBus must only be changed in the audio thread w ith the context's graph lock (or constructor). |
| 131 RefPtr<AudioBus> m_internalBus; | 131 RefPtr<AudioBus> m_internalBus; |
| 132 RefPtr<AudioBus> m_inPlaceBus; | 132 RefPtr<AudioBus> m_inPlaceBus; |
| 133 // If m_isInPlace is true, use m_inPlaceBus as the valid AudioBus; If false, use the default m_internalBus. | 133 // If m_isInPlace is true, use m_inPlaceBus as the valid AudioBus; If false, use the default m_internalBus. |
| 134 bool m_isInPlace; | 134 bool m_isInPlace; |
| 135 | 135 |
| 136 // This RefPtr<AudioNode> is connection reference. We must call AudioNode:: | 136 // This RefPtr<AudioNode> is connection reference. We must call AudioNode:: |
|
tkent
2014/08/15 07:39:00
Remove this paragraph.
haraken
2014/08/15 08:08:00
Done.
| |
| 137 // makeConnection() after ref(), and call AudioNode::breakConnection() | 137 // makeConnection() after ref(), and call AudioNode::breakConnection() |
| 138 // before deref(). | 138 // before deref(). |
| 139 // Oilpan: This HashMap holds connection references. We must call | 139 // Oilpan: This HashMap holds connection references. We must call |
| 140 // AudioNode::makeConnection when we add an AudioNode to this, and must call | 140 // AudioNode::makeConnection when we add an AudioNode to this, and must call |
| 141 // AudioNode::breakConnection() when we remove an AudioNode from this. | 141 // AudioNode::breakConnection() when we remove an AudioNode from this. |
| 142 WillBeHeapHashMap<RawPtrWillBeMember<AudioNodeInput>, RefPtrWillBeMember<Aud ioNode> > m_inputs; | 142 HeapHashMap<Member<AudioNodeInput>, Member<AudioNode> > m_inputs; |
| 143 typedef WillBeHeapHashMap<RawPtrWillBeMember<AudioNodeInput>, RefPtrWillBeMe mber<AudioNode> >::iterator InputsIterator; | 143 typedef HeapHashMap<Member<AudioNodeInput>, Member<AudioNode> >::iterator In putsIterator; |
| 144 bool m_isEnabled; | 144 bool m_isEnabled; |
| 145 | 145 |
| 146 // For the purposes of rendering, keeps track of the number of inputs and Au dioParams we're connected to. | 146 // For the purposes of rendering, keeps track of the number of inputs and Au dioParams we're connected to. |
| 147 // These value should only be changed at the very start or end of the render ing quantum. | 147 // These value should only be changed at the very start or end of the render ing quantum. |
| 148 unsigned m_renderingFanOutCount; | 148 unsigned m_renderingFanOutCount; |
| 149 unsigned m_renderingParamFanOutCount; | 149 unsigned m_renderingParamFanOutCount; |
| 150 | 150 |
| 151 WillBeHeapHashSet<RefPtrWillBeMember<AudioParam> > m_params; | 151 HeapHashSet<Member<AudioParam> > m_params; |
| 152 }; | 152 }; |
| 153 | 153 |
| 154 } // namespace blink | 154 } // namespace blink |
| 155 | 155 |
| 156 #endif // AudioNodeOutput_h | 156 #endif // AudioNodeOutput_h |
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