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_HARDWARE_CONVERSION_HELPER_HIDL_4_0_H
18#define ANDROID_HARDWARE_CONVERSION_HELPER_HIDL_4_0_H
19
20#include <android/hardware/audio/4.0/types.h>
21#include <hidl/HidlSupport.h>
22#include <system/audio.h>
23#include <utils/String8.h>
24
25using ::android::hardware::audio::V4_0::ParameterValue;
26using ::android::hardware::audio::V4_0::MicrophoneInfo;
27using ::android::hardware::Return;
28using ::android::hardware::hidl_string;
29using ::android::hardware::hidl_vec;
30
31namespace android {
32namespace V4_0 {
33
34class ConversionHelperHidl {
35  protected:
36    static status_t keysFromHal(const String8& keys, hidl_vec<hidl_string> *hidlKeys);
37    static status_t parametersFromHal(const String8& kvPairs, hidl_vec<ParameterValue> *hidlParams);
38    static void parametersToHal(const hidl_vec<ParameterValue>& parameters, String8 *values);
39    static void microphoneInfoToHal(const MicrophoneInfo& src,
40                                    audio_microphone_characteristic_t *pDst);
41
42    ConversionHelperHidl(const char* className);
43
44    template<typename R, typename T>
45    status_t processReturn(const char* funcName, const Return<R>& ret, T *retval) {
46        if (ret.isOk()) {
47            // This way it also works for enum class to unscoped enum conversion.
48            *retval = static_cast<T>(static_cast<R>(ret));
49            return OK;
50        }
51        return processReturn(funcName, ret);
52    }
53
54    template<typename T>
55    status_t processReturn(const char* funcName, const Return<T>& ret) {
56        if (!ret.isOk()) {
57            emitError(funcName, ret.description().c_str());
58        }
59        return ret.isOk() ? OK : FAILED_TRANSACTION;
60    }
61
62    status_t processReturn(const char* funcName, const Return<hardware::audio::V4_0::Result>& ret) {
63        if (!ret.isOk()) {
64            emitError(funcName, ret.description().c_str());
65        }
66        return ret.isOk() ? analyzeResult(ret) : FAILED_TRANSACTION;
67    }
68
69    template<typename T>
70    status_t processReturn(
71            const char* funcName, const Return<T>& ret, hardware::audio::V4_0::Result retval) {
72        if (!ret.isOk()) {
73            emitError(funcName, ret.description().c_str());
74        }
75        return ret.isOk() ? analyzeResult(retval) : FAILED_TRANSACTION;
76    }
77
78  private:
79    const char* mClassName;
80
81    static status_t analyzeResult(const hardware::audio::V4_0::Result& result);
82
83    void emitError(const char* funcName, const char* description);
84};
85
86}  // namespace V4_0
87}  // namespace android
88
89#endif // ANDROID_HARDWARE_CONVERSION_HELPER_HIDL_4_0_H
90