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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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| 32 | 32 |
| 33 namespace blink { | 33 namespace blink { |
| 34 | 34 |
| 35 class AudioNode; | 35 class AudioNode; |
| 36 class AudioNodeOutput; | 36 class AudioNodeOutput; |
| 37 | 37 |
| 38 // An AudioNodeInput represents an input to an AudioNode and can be connected fr
om one or more AudioNodeOutputs. | 38 // An AudioNodeInput represents an input to an AudioNode and can be connected fr
om one or more AudioNodeOutputs. |
| 39 // In the case of multiple connections, the input will act as a unity-gain summi
ng junction, mixing all the outputs. | 39 // In the case of multiple connections, the input will act as a unity-gain summi
ng junction, mixing all the outputs. |
| 40 // The number of channels of the input's bus is the maximum of the number of cha
nnels of all its connections. | 40 // The number of channels of the input's bus is the maximum of the number of cha
nnels of all its connections. |
| 41 | 41 |
| 42 class AudioNodeInput FINAL : public AudioSummingJunction { | 42 class AudioNodeInput final : public AudioSummingJunction { |
| 43 public: | 43 public: |
| 44 static AudioNodeInput* create(AudioNode&); | 44 static AudioNodeInput* create(AudioNode&); |
| 45 | 45 |
| 46 // AudioSummingJunction | 46 // AudioSummingJunction |
| 47 virtual void trace(Visitor*) OVERRIDE; | 47 virtual void trace(Visitor*) override; |
| 48 virtual void didUpdate() OVERRIDE; | 48 virtual void didUpdate() override; |
| 49 | 49 |
| 50 // Can be called from any thread. | 50 // Can be called from any thread. |
| 51 AudioNode& node() const { return *m_node; } | 51 AudioNode& node() const { return *m_node; } |
| 52 | 52 |
| 53 // Must be called with the context's graph lock. | 53 // Must be called with the context's graph lock. |
| 54 void connect(AudioNodeOutput&); | 54 void connect(AudioNodeOutput&); |
| 55 void disconnect(AudioNodeOutput&); | 55 void disconnect(AudioNodeOutput&); |
| 56 | 56 |
| 57 // disable() will take the output out of the active connections list and set
aside in a disabled list. | 57 // disable() will take the output out of the active connections list and set
aside in a disabled list. |
| 58 // enable() will put the output back into the active connections list. | 58 // enable() will put the output back into the active connections list. |
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| 94 // Called from context's audio thread. | 94 // Called from context's audio thread. |
| 95 AudioBus* internalSummingBus(); | 95 AudioBus* internalSummingBus(); |
| 96 void sumAllConnections(AudioBus* summingBus, size_t framesToProcess); | 96 void sumAllConnections(AudioBus* summingBus, size_t framesToProcess); |
| 97 | 97 |
| 98 RefPtr<AudioBus> m_internalSummingBus; | 98 RefPtr<AudioBus> m_internalSummingBus; |
| 99 }; | 99 }; |
| 100 | 100 |
| 101 } // namespace blink | 101 } // namespace blink |
| 102 | 102 |
| 103 #endif // AudioNodeInput_h | 103 #endif // AudioNodeInput_h |
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