blob: 22b780496e91c271875ad2bf5b406bac357fbcaf (
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
|
/*
* Copyright 2015 The Android Open Source Project
*
* 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.
*/
#ifndef FLOWGRAPH_CLIP_TO_RANGE_H
#define FLOWGRAPH_CLIP_TO_RANGE_H
#include <atomic>
#include <unistd.h>
#include <sys/types.h>
#include "FlowGraphNode.h"
namespace flowgraph {
// This is 3 dB, (10^(3/20)), to match the maximum headroom in AudioTrack for float data.
// It is designed to allow occasional transient peaks.
constexpr float kDefaultMaxHeadroom = 1.41253754f;
constexpr float kDefaultMinHeadroom = -kDefaultMaxHeadroom;
class ClipToRange : public FlowGraphFilter {
public:
explicit ClipToRange(int32_t channelCount);
virtual ~ClipToRange() = default;
int32_t onProcess(int32_t numFrames) override;
void setMinimum(float min) {
mMinimum = min;
}
float getMinimum() const {
return mMinimum;
}
void setMaximum(float min) {
mMaximum = min;
}
float getMaximum() const {
return mMaximum;
}
const char *getName() override {
return "ClipToRange";
}
private:
float mMinimum = kDefaultMinHeadroom;
float mMaximum = kDefaultMaxHeadroom;
};
} /* namespace flowgraph */
#endif //FLOWGRAPH_CLIP_TO_RANGE_H
|
