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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* Copyright 2014 The Chromium Authors. 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.
*/
#include "config.h"
#include "StereoPannerNode.h"
#if ENABLE(WEB_AUDIO)
#include "AudioBus.h"
#include "AudioNodeInput.h"
#include "AudioNodeOutput.h"
#include "AudioUtilities.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(StereoPannerNode);
ExceptionOr<Ref<StereoPannerNode>> StereoPannerNode::create(BaseAudioContext& context, const StereoPannerOptions& options)
{
auto stereo = adoptRef(*new StereoPannerNode(context, options.pan));
auto result = stereo->handleAudioNodeOptions(options, { 2, ChannelCountMode::ClampedMax, ChannelInterpretation::Speakers });
if (result.hasException())
return result.releaseException();
return stereo;
}
StereoPannerNode::StereoPannerNode(BaseAudioContext& context, float pan)
: AudioNode(context, NodeTypeStereoPanner)
, m_pan(AudioParam::create(context, "pan"_s, pan, -1, 1, AutomationRate::ARate))
, m_sampleAccurateValues(AudioUtilities::renderQuantumSize)
{
addInput();
addOutput(2);
initialize();
}
StereoPannerNode::~StereoPannerNode()
{
uninitialize();
}
void StereoPannerNode::process(size_t framesToProcess)
{
AudioBus* destination = output(0)->bus();
if (!isInitialized() || !input(0)->isConnected()) {
destination->zero();
return;
}
AudioBus* source = input(0)->bus();
if (!source) {
destination->zero();
return;
}
if (m_pan->hasSampleAccurateValues() && m_pan->automationRate() == AutomationRate::ARate) {
auto panValues = m_sampleAccurateValues.span().first(framesToProcess);
m_pan->calculateSampleAccurateValues(panValues);
StereoPanner::panWithSampleAccurateValues(source, destination, panValues);
return;
}
// The pan value is not sample-accurate or not a-rate. In this case, we have
// a fixed pan value for the render and just need to incorporate any inputs to
// the value, if any.
float panValue = m_pan->hasSampleAccurateValues() ? m_pan->finalValue() : m_pan->value();
StereoPanner::panToTargetValue(source, destination, panValue, framesToProcess);
}
void StereoPannerNode::processOnlyAudioParams(size_t framesToProcess)
{
std::array<float, AudioUtilities::renderQuantumSize> values;
ASSERT(framesToProcess <= AudioUtilities::renderQuantumSize);
m_pan->calculateSampleAccurateValues(std::span { values }.first(framesToProcess));
}
ExceptionOr<void> StereoPannerNode::setChannelCount(unsigned channelCount)
{
if (channelCount > 2)
return Exception { ExceptionCode::NotSupportedError, "StereoPannerNode's channelCount cannot be greater than 2."_s };
return AudioNode::setChannelCount(channelCount);
}
ExceptionOr<void> StereoPannerNode::setChannelCountMode(ChannelCountMode mode)
{
if (mode == ChannelCountMode::Max)
return Exception { ExceptionCode::NotSupportedError, "StereoPannerNode's channelCountMode cannot be max."_s };
return AudioNode::setChannelCountMode(mode);
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
|
