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 "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 blink { 37 38 class AudioContext; 39 40 class MediaStreamAudioDestinationNode FINAL : public AudioBasicInspectorNode { 41 DEFINE_WRAPPERTYPEINFO(); 42 public: 43 static MediaStreamAudioDestinationNode* create(AudioContext*, size_t numberOfChannels); 44 virtual ~MediaStreamAudioDestinationNode(); 45 virtual void trace(Visitor*) OVERRIDE; 46 47 MediaStream* stream() { return m_stream.get(); } 48 49 // AudioNode. 50 virtual void dispose() OVERRIDE; 51 virtual void process(size_t framesToProcess) OVERRIDE; 52 53 private: 54 MediaStreamAudioDestinationNode(AudioContext*, size_t numberOfChannels); 55 56 virtual double tailTime() const OVERRIDE { return 0; } 57 virtual double latencyTime() const OVERRIDE { return 0; } 58 59 // As an audio source, we will never propagate silence. 60 virtual bool propagatesSilence() const OVERRIDE { return false; } 61 62 Member<MediaStream> m_stream; 63 RefPtr<MediaStreamSource> m_source; 64 RefPtr<AudioBus> m_mixBus; 65 }; 66 67 } // namespace blink 68 69 #endif // ENABLE(WEB_AUDIO) 70 71 #endif // MediaStreamAudioDestinationNode_h 72
