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
35namespace WebCore {
36
37PassOwnPtr<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
51PassOwnPtr<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