1 /* 2 * Copyright (C) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 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 ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 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 ON 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 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef AudioBasicProcessorNode_h 26 #define AudioBasicProcessorNode_h 27 28 #include "modules/webaudio/AudioNode.h" 29 #include "wtf/Forward.h" 30 #include "wtf/Threading.h" 31 32 namespace blink { 33 34 class AudioBus; 35 class AudioNodeInput; 36 class AudioProcessor; 37 38 // AudioBasicProcessorNode is an AudioNode with one input and one output where the input and output have the same number of channels. 39 class AudioBasicProcessorNode : public AudioNode { 40 public: 41 AudioBasicProcessorNode(AudioContext*, float sampleRate); 42 virtual ~AudioBasicProcessorNode(); 43 virtual void trace(Visitor*) OVERRIDE; 44 45 // AudioNode 46 virtual void dispose() OVERRIDE FINAL; 47 virtual void process(size_t framesToProcess) OVERRIDE FINAL; 48 virtual void pullInputs(size_t framesToProcess) OVERRIDE FINAL; 49 virtual void initialize() OVERRIDE FINAL; 50 virtual void uninitialize() OVERRIDE FINAL; 51 52 // Called in the main thread when the number of channels for the input may have changed. 53 virtual void checkNumberOfChannelsForInput(AudioNodeInput*) OVERRIDE FINAL; 54 55 // Returns the number of channels for both the input and the output. 56 unsigned numberOfChannels(); 57 58 protected: 59 virtual double tailTime() const OVERRIDE FINAL; 60 virtual double latencyTime() const OVERRIDE FINAL; 61 processor()62 AudioProcessor* processor() { return m_processor.get(); } 63 Member<AudioProcessor> m_processor; 64 }; 65 66 } // namespace blink 67 68 #endif // AudioBasicProcessorNode_h 69