Stream.cpp revision 65c3781db3443531deacecfbda5c7e7e82868a34 
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 "Stream.h"
18#include "PolicyMappingKeys.h"
19#include "PolicySubsystem.h"
20
21using std::string;
22using android::routing_strategy;
23
24Stream::Stream(const string &mappingValue,
25                   CInstanceConfigurableElement *instanceConfigurableElement,
26                   const CMappingContext &context)
27    : CFormattedSubsystemObject(instanceConfigurableElement,
28                                mappingValue,
29                                MappingKeyAmend1,
30                                (MappingKeyAmendEnd - MappingKeyAmend1 + 1),
31                                context),
32      mPolicySubsystem(static_cast<const PolicySubsystem *>(
33                           instanceConfigurableElement->getBelongingSubsystem())),
34      mPolicyPluginInterface(mPolicySubsystem->getPolicyPluginInterface()),
35      mApplicableStrategy(mDefaultApplicableStrategy)
36{
37    mId = static_cast<audio_stream_type_t>(context.getItemAsInteger(MappingKeyIdentifier));
38
39    // Declares the strategy to audio policy engine
40    mPolicyPluginInterface->addStream(getFormattedMappingValue(), mId);
41}
42
43bool Stream::receiveFromHW(string & /*error*/)
44{
45    blackboardWrite(&mApplicableStrategy, sizeof(mApplicableStrategy));
46    return true;
47}
48
49bool Stream::sendToHW(string & /*error*/)
50{
51    uint32_t applicableStrategy;
52    blackboardRead(&applicableStrategy, sizeof(applicableStrategy));
53    mApplicableStrategy = applicableStrategy;
54    return mPolicyPluginInterface->setStrategyForStream(mId,
55                                              static_cast<routing_strategy>(mApplicableStrategy));
56}
57