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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef ChannelMergerNode_h 30 #define ChannelMergerNode_h 31 32 #include "modules/webaudio/AudioNode.h" 33 #include "wtf/PassRefPtr.h" 34 35 namespace WebCore { 36 37 class AudioContext; 38 39 class ChannelMergerNode FINAL : public AudioNode { 40 public: 41 static PassRefPtrWillBeRawPtr<ChannelMergerNode> create(AudioContext*, float sampleRate, unsigned numberOfInputs); 42 43 // AudioNode 44 virtual void process(size_t framesToProcess) OVERRIDE; 45 46 // Called in the audio thread (pre-rendering task) when the number of channels for an input may have changed. 47 virtual void checkNumberOfChannelsForInput(AudioNodeInput*) OVERRIDE; 48 49 private: 50 unsigned m_desiredNumberOfOutputChannels; 51 52 virtual double tailTime() const OVERRIDE { return 0; } 53 virtual double latencyTime() const OVERRIDE { return 0; } 54 55 ChannelMergerNode(AudioContext*, float sampleRate, unsigned numberOfInputs); 56 }; 57 58 } // namespace WebCore 59 60 #endif // ChannelMergerNode_h 61
