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      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 #include <string.h>
     18 
     19 #define LOG_TAG "HalHidl"
     20 #include <media/AudioParameter.h>
     21 #include <utils/Log.h>
     22 
     23 #include "ConversionHelperHidl.h"
     24 
     25 using ::android::hardware::audio::V2_0::Result;
     26 
     27 namespace android {
     28 
     29 // static
     30 status_t ConversionHelperHidl::keysFromHal(const String8& keys, hidl_vec<hidl_string> *hidlKeys) {
     31     AudioParameter halKeys(keys);
     32     if (halKeys.size() == 0) return BAD_VALUE;
     33     hidlKeys->resize(halKeys.size());
     34     //FIXME:  keyStreamSupportedChannels and keyStreamSupportedSamplingRates come with a
     35     // "keyFormat=<value>" pair. We need to transform it into a single key string so that it is
     36     // carried over to the legacy HAL via HIDL.
     37     String8 value;
     38     bool keepFormatValue = halKeys.size() == 2 &&
     39          (halKeys.get(String8(AudioParameter::keyStreamSupportedChannels), value) == NO_ERROR ||
     40          halKeys.get(String8(AudioParameter::keyStreamSupportedSamplingRates), value) == NO_ERROR);
     41 
     42     for (size_t i = 0; i < halKeys.size(); ++i) {
     43         String8 key;
     44         status_t status = halKeys.getAt(i, key);
     45         if (status != OK) return status;
     46         if (keepFormatValue && key == AudioParameter::keyFormat) {
     47             AudioParameter formatParam;
     48             halKeys.getAt(i, key, value);
     49             formatParam.add(key, value);
     50             key = formatParam.toString();
     51         }
     52         (*hidlKeys)[i] = key.string();
     53     }
     54     return OK;
     55 }
     56 
     57 // static
     58 status_t ConversionHelperHidl::parametersFromHal(
     59         const String8& kvPairs, hidl_vec<ParameterValue> *hidlParams) {
     60     AudioParameter params(kvPairs);
     61     if (params.size() == 0) return BAD_VALUE;
     62     hidlParams->resize(params.size());
     63     for (size_t i = 0; i < params.size(); ++i) {
     64         String8 key, value;
     65         status_t status = params.getAt(i, key, value);
     66         if (status != OK) return status;
     67         (*hidlParams)[i].key = key.string();
     68         (*hidlParams)[i].value = value.string();
     69     }
     70     return OK;
     71 }
     72 
     73 // static
     74 void ConversionHelperHidl::parametersToHal(
     75         const hidl_vec<ParameterValue>& parameters, String8 *values) {
     76     AudioParameter params;
     77     for (size_t i = 0; i < parameters.size(); ++i) {
     78         params.add(String8(parameters[i].key.c_str()), String8(parameters[i].value.c_str()));
     79     }
     80     values->setTo(params.toString());
     81 }
     82 
     83 ConversionHelperHidl::ConversionHelperHidl(const char* className)
     84         : mClassName(className) {
     85 }
     86 
     87 // static
     88 status_t ConversionHelperHidl::analyzeResult(const Result& result) {
     89     switch (result) {
     90         case Result::OK: return OK;
     91         case Result::INVALID_ARGUMENTS: return BAD_VALUE;
     92         case Result::INVALID_STATE: return NOT_ENOUGH_DATA;
     93         case Result::NOT_INITIALIZED: return NO_INIT;
     94         case Result::NOT_SUPPORTED: return INVALID_OPERATION;
     95         default: return NO_INIT;
     96     }
     97 }
     98 
     99 void ConversionHelperHidl::emitError(const char* funcName, const char* description) {
    100     ALOGE("%s %p %s: %s (from rpc)", mClassName, this, funcName, description);
    101 }
    102 
    103 }  // namespace android
    104