1 /* 2 * Copyright (C) 2012, 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 MediaStreamAudioDestinationNode_h 26 #define MediaStreamAudioDestinationNode_h 27 28 #if ENABLE(WEB_AUDIO) 29 30 #include "core/platform/audio/AudioBus.h" 31 #include "modules/mediastream/MediaStream.h" 32 #include "modules/webaudio/AudioBasicInspectorNode.h" 33 #include "wtf/OwnPtr.h" 34 #include "wtf/PassRefPtr.h" 35 36 namespace WebCore { 37 38 class AudioContext; 39 40 class MediaStreamAudioDestinationNode : public AudioBasicInspectorNode { 41 public: 42 static PassRefPtr<MediaStreamAudioDestinationNode> create(AudioContext*, size_t numberOfChannels); 43 44 virtual ~MediaStreamAudioDestinationNode(); 45 46 MediaStream* stream() { return m_stream.get(); } 47 48 // AudioNode. 49 virtual void process(size_t framesToProcess); 50 virtual void reset(); 51 52 MediaStreamSource* mediaStreamSource(); 53 54 private: 55 MediaStreamAudioDestinationNode(AudioContext*, size_t numberOfChannels); 56 57 virtual double tailTime() const OVERRIDE { return 0; } 58 virtual double latencyTime() const OVERRIDE { return 0; } 59 60 // As an audio source, we will never propagate silence. 61 virtual bool propagatesSilence() const OVERRIDE { return false; } 62 63 RefPtr<MediaStream> m_stream; 64 RefPtr<MediaStreamSource> m_source; 65 RefPtr<AudioBus> m_mixBus; 66 }; 67 68 } // namespace WebCore 69 70 #endif // ENABLE(WEB_AUDIO) 71 72 #endif // MediaStreamAudioDestinationNode_h 73
