1/* 2 * Copyright 2014 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 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * 3. Neither the name of Google Inc. nor the names of its contributors 15 * may be used to endorse or promote products derived from this 16 * software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32 33#if ENABLE(WEB_AUDIO) 34 35#include "platform/mediastream/MediaStreamWebAudioSource.h" 36 37#include "platform/audio/AudioBus.h" 38#include "public/platform/WebAudioSourceProvider.h" 39 40namespace blink { 41 42MediaStreamWebAudioSource::MediaStreamWebAudioSource(PassOwnPtr<blink::WebAudioSourceProvider> provider) 43 : m_webAudioSourceProvider(provider) 44{ 45} 46 47MediaStreamWebAudioSource::~MediaStreamWebAudioSource() 48{ 49} 50 51void MediaStreamWebAudioSource::provideInput(AudioBus* bus, size_t framesToProcess) 52{ 53 ASSERT(bus); 54 if (!bus) 55 return; 56 57 if (!m_webAudioSourceProvider) { 58 bus->zero(); 59 return; 60 } 61 62 // Wrap the AudioBus channel data using WebVector. 63 size_t n = bus->numberOfChannels(); 64 blink::WebVector<float*> webAudioData(n); 65 for (size_t i = 0; i < n; ++i) 66 webAudioData[i] = bus->channel(i)->mutableData(); 67 68 m_webAudioSourceProvider->provideInput(webAudioData, framesToProcess); 69} 70 71} // namespace blink 72 73#endif // ENABLE(WEB_AUDIO) 74