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1 /*
2  * Copyright (C) 2018 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_HARDWARE_AUDIO_UTIL_H
18 #define ANDROID_HARDWARE_AUDIO_UTIL_H
19 
20 // clang-format off
21 #include PATH(android/hardware/audio/CORE_TYPES_FILE_VERSION/types.h)
22 // clang-format on
23 
24 #include <algorithm>
25 #include <vector>
26 
27 #include <system/audio.h>
28 
29 namespace android {
30 namespace hardware {
31 namespace audio {
32 namespace CORE_TYPES_CPP_VERSION {
33 namespace implementation {
34 
35 using namespace ::android::hardware::audio::common::COMMON_TYPES_CPP_VERSION;
36 using namespace ::android::hardware::audio::CORE_TYPES_CPP_VERSION;
37 
38 namespace util {
39 
40 /** @return true if gain is between 0 and 1 included. */
isGainNormalized(float gain)41 constexpr bool isGainNormalized(float gain) {
42     return gain >= 0.0 && gain <= 1.0;
43 }
44 
45 template <typename T>
element_in(T e,const std::vector<T> & v)46 inline bool element_in(T e, const std::vector<T>& v) {
47     return std::find(v.begin(), v.end(), e) != v.end();
48 }
49 
analyzeStatus(status_t status)50 static inline Result analyzeStatus(status_t status) {
51     switch (status) {
52         case 0:
53             return Result::OK;
54         case -EINVAL:
55             return Result::INVALID_ARGUMENTS;
56         case -ENODATA:
57             return Result::INVALID_STATE;
58         case -ENODEV:
59             return Result::NOT_INITIALIZED;
60         case -ENOSYS:
61             return Result::NOT_SUPPORTED;
62         default:
63             return Result::INVALID_STATE;
64     }
65 }
66 
67 static inline Result analyzeStatus(const char* className, const char* funcName, status_t status,
68                                    const std::vector<int>& ignoreErrors = {}) {
69     if (status != 0 && !element_in(-status, ignoreErrors)) {
70         ALOGW("Error from HAL %s in function %s: %s", className, funcName, strerror(-status));
71     }
72     return analyzeStatus(status);
73 }
74 
75 }  // namespace util
76 }  // namespace implementation
77 }  // namespace CORE_TYPES_CPP_VERSION
78 }  // namespace audio
79 }  // namespace hardware
80 }  // namespace android
81 
82 #endif  // ANDROID_HARDWARE_AUDIO_UTIL_H
83