| OLD | NEW |
| 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 |
| (...skipping 18 matching lines...) Expand all Loading... |
| 29 #include "bindings/core/v8/ActiveScriptWrappable.h" | 29 #include "bindings/core/v8/ActiveScriptWrappable.h" |
| 30 #include "modules/webaudio/AudioNode.h" | 30 #include "modules/webaudio/AudioNode.h" |
| 31 #include "platform/audio/AudioBus.h" | 31 #include "platform/audio/AudioBus.h" |
| 32 #include "wtf/Forward.h" | 32 #include "wtf/Forward.h" |
| 33 #include "wtf/PassRefPtr.h" | 33 #include "wtf/PassRefPtr.h" |
| 34 #include "wtf/RefPtr.h" | 34 #include "wtf/RefPtr.h" |
| 35 #include "wtf/Vector.h" | 35 #include "wtf/Vector.h" |
| 36 | 36 |
| 37 namespace blink { | 37 namespace blink { |
| 38 | 38 |
| 39 class AbstractAudioContext; | 39 class BaseAudioContext; |
| 40 class AudioBuffer; | 40 class AudioBuffer; |
| 41 | 41 |
| 42 // ScriptProcessorNode is an AudioNode which allows for arbitrary synthesis or p
rocessing directly using JavaScript. | 42 // ScriptProcessorNode is an AudioNode which allows for arbitrary synthesis or p
rocessing directly using JavaScript. |
| 43 // The API allows for a variable number of inputs and outputs, although it must
have at least one input or output. | 43 // The API allows for a variable number of inputs and outputs, although it must
have at least one input or output. |
| 44 // This basic implementation supports no more than one input and output. | 44 // This basic implementation supports no more than one input and output. |
| 45 // The "onaudioprocess" attribute is an event listener which will get called per
iodically with an AudioProcessingEvent which has | 45 // The "onaudioprocess" attribute is an event listener which will get called per
iodically with an AudioProcessingEvent which has |
| 46 // AudioBuffers for each input and output. | 46 // AudioBuffers for each input and output. |
| 47 | 47 |
| 48 class ScriptProcessorHandler final : public AudioHandler { | 48 class ScriptProcessorHandler final : public AudioHandler { |
| 49 public: | 49 public: |
| (...skipping 45 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 95 DEFINE_WRAPPERTYPEINFO(); | 95 DEFINE_WRAPPERTYPEINFO(); |
| 96 public: | 96 public: |
| 97 // bufferSize must be one of the following values: 256, 512, 1024, 2048, | 97 // bufferSize must be one of the following values: 256, 512, 1024, 2048, |
| 98 // 4096, 8192, 16384. | 98 // 4096, 8192, 16384. |
| 99 // This value controls how frequently the onaudioprocess event handler is | 99 // This value controls how frequently the onaudioprocess event handler is |
| 100 // called and how many sample-frames need to be processed each call. | 100 // called and how many sample-frames need to be processed each call. |
| 101 // Lower numbers for bufferSize will result in a lower (better) | 101 // Lower numbers for bufferSize will result in a lower (better) |
| 102 // latency. Higher numbers will be necessary to avoid audio breakup and | 102 // latency. Higher numbers will be necessary to avoid audio breakup and |
| 103 // glitches. | 103 // glitches. |
| 104 // The value chosen must carefully balance between latency and audio quality
. | 104 // The value chosen must carefully balance between latency and audio quality
. |
| 105 static ScriptProcessorNode* create(AbstractAudioContext&, float sampleRate,
size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChanne
ls); | 105 static ScriptProcessorNode* create(BaseAudioContext&, float sampleRate, size
_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels); |
| 106 | 106 |
| 107 DEFINE_ATTRIBUTE_EVENT_LISTENER(audioprocess); | 107 DEFINE_ATTRIBUTE_EVENT_LISTENER(audioprocess); |
| 108 size_t bufferSize() const; | 108 size_t bufferSize() const; |
| 109 | 109 |
| 110 // ActiveScriptWrappable | 110 // ActiveScriptWrappable |
| 111 bool hasPendingActivity() const final; | 111 bool hasPendingActivity() const final; |
| 112 | 112 |
| 113 private: | 113 private: |
| 114 ScriptProcessorNode(AbstractAudioContext&, float sampleRate, size_t bufferSi
ze, unsigned numberOfInputChannels, unsigned numberOfOutputChannels); | 114 ScriptProcessorNode(BaseAudioContext&, float sampleRate, size_t bufferSize,
unsigned numberOfInputChannels, unsigned numberOfOutputChannels); |
| 115 }; | 115 }; |
| 116 | 116 |
| 117 } // namespace blink | 117 } // namespace blink |
| 118 | 118 |
| 119 #endif // ScriptProcessorNode_h | 119 #endif // ScriptProcessorNode_h |
| OLD | NEW |