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
125
|
/*
* Copyright (C) 2011, 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_BIQUAD_FILTER_NODE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_BIQUAD_FILTER_NODE_H_
#include "base/memory/weak_ptr.h"
#include "third_party/blink/renderer/core/typed_arrays/array_buffer_view_helpers.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h"
#include "third_party/blink/renderer/modules/webaudio/audio_basic_processor_handler.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node.h"
#include "third_party/blink/renderer/modules/webaudio/biquad_processor.h"
namespace blink {
class BaseAudioContext;
class AudioParam;
class BiquadFilterOptions;
class BiquadFilterHandler : public AudioBasicProcessorHandler ,
public base::SupportsWeakPtr<BiquadFilterHandler> {
public:
static scoped_refptr<BiquadFilterHandler> Create(AudioNode&,
float sample_rate,
AudioParamHandler& frequency,
AudioParamHandler& q,
AudioParamHandler& gain,
AudioParamHandler& detune);
void Process(uint32_t frames_to_process) override;
private:
BiquadFilterHandler(AudioNode&,
float sample_rate,
AudioParamHandler& frequency,
AudioParamHandler& q,
AudioParamHandler& gain,
AudioParamHandler& detune);
void NotifyBadState() const;
// Only notify the user of the once. No need to spam the console with
// messages, because once we're in a bad state, it usually stays that way
// forever. Only accessed from audio thread.
bool did_warn_bad_filter_state_ = false;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
};
class BiquadFilterNode final : public AudioNode {
DEFINE_WRAPPERTYPEINFO();
public:
// These must be defined as in the .idl file and must match those in the
// BiquadProcessor class.
enum {
LOWPASS = 0,
HIGHPASS = 1,
BANDPASS = 2,
LOWSHELF = 3,
HIGHSHELF = 4,
PEAKING = 5,
NOTCH = 6,
ALLPASS = 7
};
static BiquadFilterNode* Create(BaseAudioContext&, ExceptionState&);
static BiquadFilterNode* Create(BaseAudioContext*,
const BiquadFilterOptions*,
ExceptionState&);
BiquadFilterNode(BaseAudioContext&);
void Trace(blink::Visitor*) override;
String type() const;
void setType(const String&);
AudioParam* frequency() { return frequency_; }
AudioParam* q() { return q_; }
AudioParam* gain() { return gain_; }
AudioParam* detune() { return detune_; }
// Get the magnitude and phase response of the filter at the given
// set of frequencies (in Hz). The phase response is in radians.
void getFrequencyResponse(NotShared<const DOMFloat32Array> frequency_hz,
NotShared<DOMFloat32Array> mag_response,
NotShared<DOMFloat32Array> phase_response,
ExceptionState&);
private:
BiquadProcessor* GetBiquadProcessor() const;
bool setType(unsigned); // Returns true on success.
Member<AudioParam> frequency_;
Member<AudioParam> q_;
Member<AudioParam> gain_;
Member<AudioParam> detune_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_BIQUAD_FILTER_NODE_H_
|
