services/audiopolicy/engineconfigurable/parameter-framework/plugin/Stream.cpp

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "Stream.h"
#include "PolicyMappingKeys.h"
#include "PolicySubsystem.h"
#include <media/TypeConverter.h>

using std::string;

Stream::Stream(const string &/*mappingValue*/,
               CInstanceConfigurableElement *instanceConfigurableElement,
               const CMappingContext &context, core::log::Logger &logger)
    : CSubsystemObject(instanceConfigurableElement, logger),
      mPolicySubsystem(static_cast<const PolicySubsystem *>(
                           instanceConfigurableElement->getBelongingSubsystem())),
      mPolicyPluginInterface(mPolicySubsystem->getPolicyPluginInterface())
{
    std::string name(context.getItem(MappingKeyName));

    if (not android::StreamTypeConverter::fromString(name, mId)) {
        LOG_ALWAYS_FATAL("Invalid Stream type name: %s, invalid XML structure file", name.c_str());
    }

    // Declares the strategy to audio policy engine
    mPolicyPluginInterface->addStream(name, mId);
}

bool Stream::sendToHW(string & /*error*/)
{
    Applicable params;
    blackboardRead(&params, sizeof(params));

    mPolicyPluginInterface->setVolumeProfileForStream(
                mId, static_cast<audio_stream_type_t>(params.volumeProfile));

    return true;

}