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 * 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 #include "config.h" 26 #include "public/platform/WebAudioBus.h" 27 28 #if ENABLE(WEB_AUDIO) 29 #include "core/platform/audio/AudioBus.h" 30 #else 31 #include "wtf/ThreadSafeRefCounted.h" 32 33 namespace WebCore { 34 class AudioBus : public ThreadSafeRefCounted<AudioBus> { 35 }; 36 } // namespace WebCore 37 #endif 38 39 #include "wtf/PassRefPtr.h" 40 #include "wtf/RefPtr.h" 41 42 using namespace WebCore; 43 44 namespace WebKit { 45 46 class WebAudioBusPrivate : public AudioBus { 47 }; 48 49 void WebAudioBus::initialize(unsigned numberOfChannels, size_t length, double sampleRate) 50 { 51 #if ENABLE(WEB_AUDIO) 52 RefPtr<AudioBus> audioBus = AudioBus::create(numberOfChannels, length); 53 audioBus->setSampleRate(sampleRate); 54 55 if (m_private) 56 (static_cast<AudioBus*>(m_private))->deref(); 57 58 audioBus->ref(); 59 m_private = static_cast<WebAudioBusPrivate*>(audioBus.get()); 60 #else 61 ASSERT_NOT_REACHED(); 62 #endif 63 } 64 65 void WebAudioBus::resizeSmaller(size_t newLength) 66 { 67 #if ENABLE(WEB_AUDIO) 68 ASSERT(m_private); 69 if (m_private) { 70 ASSERT(newLength <= length()); 71 m_private->resizeSmaller(newLength); 72 } 73 #else 74 ASSERT_NOT_REACHED(); 75 #endif 76 } 77 78 void WebAudioBus::reset() 79 { 80 #if ENABLE(WEB_AUDIO) 81 if (m_private) { 82 (static_cast<AudioBus*>(m_private))->deref(); 83 m_private = 0; 84 } 85 #else 86 ASSERT_NOT_REACHED(); 87 #endif 88 } 89 90 unsigned WebAudioBus::numberOfChannels() const 91 { 92 #if ENABLE(WEB_AUDIO) 93 if (!m_private) 94 return 0; 95 return m_private->numberOfChannels(); 96 #else 97 ASSERT_NOT_REACHED(); 98 return 0; 99 #endif 100 } 101 102 size_t WebAudioBus::length() const 103 { 104 #if ENABLE(WEB_AUDIO) 105 if (!m_private) 106 return 0; 107 return m_private->length(); 108 #else 109 ASSERT_NOT_REACHED(); 110 return 0; 111 #endif 112 } 113 114 double WebAudioBus::sampleRate() const 115 { 116 #if ENABLE(WEB_AUDIO) 117 if (!m_private) 118 return 0; 119 return m_private->sampleRate(); 120 #else 121 ASSERT_NOT_REACHED(); 122 return 0; 123 #endif 124 } 125 126 float* WebAudioBus::channelData(unsigned channelIndex) 127 { 128 #if ENABLE(WEB_AUDIO) 129 if (!m_private) 130 return 0; 131 ASSERT(channelIndex < numberOfChannels()); 132 return m_private->channel(channelIndex)->mutableData(); 133 #else 134 ASSERT_NOT_REACHED(); 135 return 0; 136 #endif 137 } 138 139 PassRefPtr<AudioBus> WebAudioBus::release() 140 { 141 #if ENABLE(WEB_AUDIO) 142 RefPtr<AudioBus> audioBus(adoptRef(static_cast<AudioBus*>(m_private))); 143 m_private = 0; 144 return audioBus; 145 #else 146 ASSERT_NOT_REACHED(); 147 return 0; 148 #endif 149 } 150 151 } // namespace WebKit 152
