1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_EFFECT_NS_CORE_H_
18 #define ANDROID_EFFECT_NS_CORE_H_
19 
20 #include <system/audio_effect.h>
21 
22 #if __cplusplus
23 extern "C" {
24 #endif
25 
26 // The NS type UUID is not defined by OpenSL ES and has been generated from
27 // http://www.itu.int/ITU-T/asn1/uuid.html
28 static const effect_uuid_t FX_IID_NS_ =
29     { 0x58b4b260, 0x8e06, 0x11e0, 0xaa8e, { 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b } };
30 const effect_uuid_t * const FX_IID_NS = &FX_IID_NS_;
31 
32 typedef enum
33 {
34     NS_PARAM_LEVEL,             // noise suppression level (t_ns_level)
35     NS_PARAM_PROPERTIES,
36     NS_PARAM_TYPE               // noise suppression type (t_ns_type)
37 } t_ns_params;
38 
39 // noise suppression level
40 typedef enum {
41     NS_LEVEL_LOW,
42     NS_LEVEL_MEDIUM,
43     NS_LEVEL_HIGH
44 } t_ns_level;
45 
46 // noise suppression type
47 typedef enum {
48     NS_TYPE_SINGLE_CHANNEL,
49     NS_TYPE_MULTI_CHANNEL
50 } t_ns_type;
51 
52 // s_ns_settings groups all current ns settings for backup and restore.
53 typedef struct s_ns_settings {
54     uint32_t  level;
55     uint32_t  type;
56 } t_ns_settings;
57 
58 #if __cplusplus
59 }  // extern "C"
60 #endif
61 
62 
63 #endif /*ANDROID_EFFECT_NS_CORE_H_*/
64