1 /* 2 * Copyright (C) 2012, Intel Corporation. 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 AudioBasicInspectorNode_h 26 #define AudioBasicInspectorNode_h 27 28 #include "modules/webaudio/AudioNode.h" 29 30 namespace WebCore { 31 32 class ExceptionState; 33 34 // AudioBasicInspectorNode is an AudioNode with one input and one output where the output might not necessarily connect to another node's input. 35 // If the output is not connected to any other node, then the AudioBasicInspectorNode's processIfNecessary() function will be called automatically by 36 // AudioContext before the end of each render quantum so that it can inspect the audio stream. 37 class AudioBasicInspectorNode : public AudioNode { 38 public: 39 AudioBasicInspectorNode(AudioContext*, float sampleRate, unsigned outputChannelCount); 40 41 // AudioNode 42 virtual void pullInputs(size_t framesToProcess); 43 virtual void connect(AudioNode*, unsigned outputIndex, unsigned inputIndex, ExceptionState&); 44 virtual void disconnect(unsigned outputIndex, ExceptionState&); 45 virtual void checkNumberOfChannelsForInput(AudioNodeInput*); 46 47 private: 48 void updatePullStatus(); 49 bool m_needAutomaticPull; // When setting to true, AudioBasicInspectorNode will be pulled automaticlly by AudioContext before the end of each render quantum. 50 }; 51 52 } // namespace WebCore 53 54 #endif // AudioBasicInspectorNode_h 55
