1/* 2 * Copyright (C) 2011 Ericsson AB. All rights reserved. 3 * Copyright (C) 2013 Google Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "config.h" 33 34#include "platform/mediastream/MediaStreamComponent.h" 35 36#include "platform/UUID.h" 37#include "platform/audio/AudioBus.h" 38#include "platform/mediastream/MediaStreamSource.h" 39#include "public/platform/WebAudioSourceProvider.h" 40 41namespace blink { 42 43PassRefPtr<MediaStreamComponent> MediaStreamComponent::create(PassRefPtr<MediaStreamSource> source) 44{ 45 return adoptRef(new MediaStreamComponent(createCanonicalUUIDString(), source)); 46} 47 48PassRefPtr<MediaStreamComponent> MediaStreamComponent::create(const String& id, PassRefPtr<MediaStreamSource> source) 49{ 50 return adoptRef(new MediaStreamComponent(id, source)); 51} 52 53MediaStreamComponent::MediaStreamComponent(const String& id, PassRefPtr<MediaStreamSource> source) 54 : m_source(source) 55 , m_id(id) 56 , m_enabled(true) 57 , m_muted(false) 58{ 59 ASSERT(m_id.length()); 60} 61 62#if ENABLE(WEB_AUDIO) 63void MediaStreamComponent::AudioSourceProviderImpl::wrap(blink::WebAudioSourceProvider* provider) 64{ 65 MutexLocker locker(m_provideInputLock); 66 m_webAudioSourceProvider = provider; 67} 68 69void MediaStreamComponent::AudioSourceProviderImpl::provideInput(AudioBus* bus, size_t framesToProcess) 70{ 71 ASSERT(bus); 72 if (!bus) 73 return; 74 75 MutexTryLocker tryLocker(m_provideInputLock); 76 if (!tryLocker.locked() || !m_webAudioSourceProvider) { 77 bus->zero(); 78 return; 79 } 80 81 // Wrap the AudioBus channel data using WebVector. 82 size_t n = bus->numberOfChannels(); 83 blink::WebVector<float*> webAudioData(n); 84 for (size_t i = 0; i < n; ++i) 85 webAudioData[i] = bus->channel(i)->mutableData(); 86 87 m_webAudioSourceProvider->provideInput(webAudioData, framesToProcess); 88} 89#endif // #if ENABLE(WEB_AUDIO) 90 91} // namespace blink 92 93