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 27 #if ENABLE(WEB_AUDIO) 28 29 #include "AudioBus.h" 30 31 #include "AudioFileReader.h" 32 #include "PlatformBridge.h" 33 #include <wtf/PassOwnPtr.h> 34 35 namespace WebCore { 36 37 PassOwnPtr<AudioBus> AudioBus::loadPlatformResource(const char* name, double sampleRate) 38 { 39 // FIXME: the sampleRate parameter is ignored. It should be removed from the API. 40 OwnPtr<AudioBus> audioBus = PlatformBridge::loadPlatformAudioResource(name, sampleRate); 41 if (!audioBus.get()) 42 return 0; 43 44 // If the bus is already at the requested sample-rate then return as is. 45 if (audioBus->sampleRate() == sampleRate) 46 return audioBus.release(); 47 48 return AudioBus::createBySampleRateConverting(audioBus.get(), false, sampleRate); 49 } 50 51 PassOwnPtr<AudioBus> createBusFromInMemoryAudioFile(const void* data, size_t dataSize, bool mixToMono, double sampleRate) 52 { 53 // FIXME: the sampleRate parameter is ignored. It should be removed from the API. 54 OwnPtr<AudioBus> audioBus = PlatformBridge::decodeAudioFileData(static_cast<const char*>(data), dataSize, sampleRate); 55 if (!audioBus.get()) 56 return 0; 57 58 // If the bus needs no conversion then return as is. 59 if ((!mixToMono || audioBus->numberOfChannels() == 1) && audioBus->sampleRate() == sampleRate) 60 return audioBus.release(); 61 62 return AudioBus::createBySampleRateConverting(audioBus.get(), mixToMono, sampleRate); 63 } 64 65 } // namespace WebCore 66 67 #endif // ENABLE(WEB_AUDIO) 68
