blob: 3d44e897b3ac15038d5fa4d38543e3dd4cd70a25 (
plain)
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
|
/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#pragma once
/**
* @file Envelope.h
* @ingroup fx
* The Envelope class.
*/
#include "fx/Effect.h"
AUD_NAMESPACE_BEGIN
class CallbackIIRFilterReader;
struct EnvelopeParameters;
/**
* This sound creates an envelope follower reader.
*/
class AUD_API Envelope : public Effect
{
private:
/**
* The attack value in seconds.
*/
const float m_attack;
/**
* The release value in seconds.
*/
const float m_release;
/**
* The threshold value.
*/
const float m_threshold;
/**
* The attack/release threshold value.
*/
const float m_arthreshold;
// delete copy constructor and operator=
Envelope(const Envelope&) = delete;
Envelope& operator=(const Envelope&) = delete;
public:
/**
* Creates a new envelope sound.
* \param sound The input sound.
* \param attack The attack value in seconds.
* \param release The release value in seconds.
* \param threshold The threshold value.
* \param arthreshold The attack/release threshold value.
*/
Envelope(std::shared_ptr<ISound> sound, float attack, float release,
float threshold, float arthreshold);
virtual std::shared_ptr<IReader> createReader();
/**
* The envelopeFilter function implements the doFilterIIR callback
* for the callback IIR filter.
* @param reader The CallbackIIRFilterReader that executes the callback.
* @param param The envelope parameters.
* @return The filtered sample.
*/
static sample_t AUD_LOCAL envelopeFilter(CallbackIIRFilterReader* reader, EnvelopeParameters* param);
/**
* The endEnvelopeFilter function implements the endFilterIIR callback
* for the callback IIR filter.
* @param param The envelope parameters.
*/
static void AUD_LOCAL endEnvelopeFilter(EnvelopeParameters* param);
};
AUD_NAMESPACE_END
|