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      1 /*
      2  * Copyright (C) 2015 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 "VolumeProfile.h"
     18 #include "PolicyMappingKeys.h"
     19 #include "PolicySubsystem.h"
     20 #include "ParameterBlockType.h"
     21 #include <Volume.h>
     22 #include <math.h>
     23 
     24 using std::string;
     25 
     26 VolumeProfile::VolumeProfile(const string &mappingValue,
     27                              CInstanceConfigurableElement *instanceConfigurableElement,
     28                              const CMappingContext &context)
     29     : CFormattedSubsystemObject(instanceConfigurableElement,
     30                                 mappingValue,
     31                                 MappingKeyAmend1,
     32                                 (MappingKeyAmendEnd - MappingKeyAmend1 + 1),
     33                                 context),
     34       mPolicySubsystem(static_cast<const PolicySubsystem *>(
     35                            instanceConfigurableElement->getBelongingSubsystem())),
     36       mPolicyPluginInterface(mPolicySubsystem->getPolicyPluginInterface())
     37 {
     38     uint32_t categoryKey = context.getItemAsInteger(MappingKeyCategory);
     39     if (categoryKey >= Volume::DEVICE_CATEGORY_CNT) {
     40         mCategory = Volume::DEVICE_CATEGORY_SPEAKER;
     41     } else {
     42         mCategory = static_cast<Volume::device_category>(categoryKey);
     43     }
     44     mId = static_cast<audio_stream_type_t>(context.getItemAsInteger(MappingKeyIdentifier));
     45 
     46     // (no exception support, defer the error)
     47     if (instanceConfigurableElement->getType() != CInstanceConfigurableElement::EParameterBlock) {
     48         return;
     49     }
     50     // Get actual element type
     51     const CParameterBlockType *parameterType = static_cast<const CParameterBlockType *>(
     52                 instanceConfigurableElement->getTypeElement());
     53     mPoints = parameterType->getArrayLength();
     54 }
     55 
     56 bool VolumeProfile::receiveFromHW(string & /*error*/)
     57 {
     58     return true;
     59 }
     60 
     61 bool VolumeProfile::sendToHW(string & /*error*/)
     62 {
     63     Point points[mPoints];
     64     blackboardRead(&points, sizeof(Point) * mPoints);
     65 
     66     VolumeCurvePoints pointsVector;
     67     for (size_t i = 0; i < mPoints; i++) {
     68         VolumeCurvePoint curvePoint;
     69         curvePoint.mIndex = points[i].index;
     70         curvePoint.mDBAttenuation = static_cast<float>(points[i].dbAttenuation) /
     71                 (1UL << gFractional);
     72         pointsVector.push_back(curvePoint);
     73     }
     74     return mPolicyPluginInterface->setVolumeProfileForStream(mId, mCategory, pointsVector);
     75 }
     76