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
82
83
84
|
/*
* Copyright (C) 2011, Google Inc. All rights reserved.
* Copyright (C) 2020, Apple 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.
*/
#pragma once
#if ENABLE(WEB_AUDIO) && ENABLE(VIDEO)
#include "AudioNode.h"
#include "AudioSourceProviderClient.h"
#include "HTMLMediaElement.h"
#include "MultiChannelResampler.h"
#include <memory>
#include <wtf/Lock.h>
namespace WebCore {
class AudioContext;
struct MediaElementAudioSourceOptions;
class MediaElementAudioSourceNode final : public AudioNode, public AudioSourceProviderClient {
WTF_MAKE_ISO_ALLOCATED(MediaElementAudioSourceNode);
public:
static ExceptionOr<Ref<MediaElementAudioSourceNode>> create(BaseAudioContext&, MediaElementAudioSourceOptions&&);
virtual ~MediaElementAudioSourceNode();
HTMLMediaElement& mediaElement() { return m_mediaElement; }
// AudioNode
void process(size_t framesToProcess) override;
// AudioSourceProviderClient
void setFormat(size_t numberOfChannels, float sampleRate) override;
Lock& processLock() WTF_RETURNS_LOCK(m_processLock) { return m_processLock; }
private:
MediaElementAudioSourceNode(BaseAudioContext&, Ref<HTMLMediaElement>&&);
void provideInput(AudioBus*, size_t framesToProcess);
double tailTime() const override { return 0; }
double latencyTime() const override { return 0; }
bool requiresTailProcessing() const final { return false; }
// As an audio source, we will never propagate silence.
bool propagatesSilence() const override { return false; }
bool wouldTaintOrigin();
Ref<HTMLMediaElement> m_mediaElement;
Lock m_processLock;
unsigned m_sourceNumberOfChannels WTF_GUARDED_BY_LOCK(m_processLock) { 0 };
double m_sourceSampleRate WTF_GUARDED_BY_LOCK(m_processLock) { 0 };
bool m_muted WTF_GUARDED_BY_LOCK(m_processLock) { false };
std::unique_ptr<MultiChannelResampler> m_multiChannelResampler WTF_GUARDED_BY_LOCK(m_processLock);
};
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO) && ENABLE(VIDEO)
|
