1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright (C) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "AudioBus.h"
#include "AudioFileReader.h"
#include <public/Platform.h>
#include <public/WebAudioBus.h>
#include <wtf/PassOwnPtr.h>
namespace WebCore {
PassOwnPtr<AudioBus> decodeAudioFileData(const char* data, size_t size, double sampleRate)
{
WebKit::WebAudioBus webAudioBus;
if (WebKit::Platform::current()->loadAudioResource(&webAudioBus, data, size, sampleRate))
return webAudioBus.release();
return nullptr;
}
PassOwnPtr<AudioBus> AudioBus::loadPlatformResource(const char* name, float sampleRate)
{
const WebKit::WebData& resource = WebKit::Platform::current()->loadResource(name);
if (resource.isEmpty())
return nullptr;
// FIXME: the sampleRate parameter is ignored. It should be removed from the API.
OwnPtr<AudioBus> audioBus = decodeAudioFileData(resource.data(), resource.size(), sampleRate);
if (!audioBus.get())
return nullptr;
// If the bus is already at the requested sample-rate then return as is.
if (audioBus->sampleRate() == sampleRate)
return audioBus.release();
return AudioBus::createBySampleRateConverting(audioBus.get(), false, sampleRate);
}
PassOwnPtr<AudioBus> createBusFromInMemoryAudioFile(const void* data, size_t dataSize, bool mixToMono, float sampleRate)
{
// FIXME: the sampleRate parameter is ignored. It should be removed from the API.
OwnPtr<AudioBus> audioBus = decodeAudioFileData(static_cast<const char*>(data), dataSize, sampleRate);
if (!audioBus.get())
return nullptr;
// If the bus needs no conversion then return as is.
if ((!mixToMono || audioBus->numberOfChannels() == 1) && audioBus->sampleRate() == sampleRate)
return audioBus.release();
return AudioBus::createBySampleRateConverting(audioBus.get(), mixToMono, sampleRate);
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
|
