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