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 #pragma once 18 19 #include "EngineBase.h" 20 #include "EngineInterface.h" 21 #include <policy.h> 22 23 namespace android 24 { 25 26 class AudioPolicyManagerObserver; 27 28 namespace audio_policy 29 { 30 31 class Engine : public EngineBase 32 { 33 public: 34 Engine() = default; 35 virtual ~Engine() = default; 36 Engine(const Engine &object) = delete; 37 Engine &operator=(const Engine &object) = delete; 38 39 /// 40 /// from EngineInterface 41 /// 42 status_t loadFromHalConfigWithFallback( 43 const media::audio::common::AudioHalEngineConfig& config) override; 44 status_t loadFromXmlConfigWithFallback(const std::string& xmlFilePath = "") override; 45 46 private: 47 /// 48 /// from EngineBase, so from EngineInterface 49 /// 50 status_t setForceUse(audio_policy_force_use_t usage, 51 audio_policy_forced_cfg_t config) override; 52 53 DeviceVector getOutputDevicesForAttributes(const audio_attributes_t &attr, 54 const sp<DeviceDescriptor> &preferedDevice = nullptr, 55 bool fromCache = false) const override; 56 57 DeviceVector getOutputDevicesForStream(audio_stream_type_t stream, 58 bool fromCache = false) const override; 59 60 sp<DeviceDescriptor> getInputDeviceForAttributes(const audio_attributes_t &attr, 61 uid_t uid = 0, 62 audio_session_t session = AUDIO_SESSION_NONE, 63 sp<AudioPolicyMix> *mix = nullptr) 64 const override; 65 66 void setStrategyDevices(const sp<ProductStrategy>& strategy, 67 const DeviceVector& devices) override; 68 69 DeviceVector getDevicesForProductStrategy(product_strategy_t strategy) const override; 70 71 private: 72 template<typename T> 73 status_t loadWithFallback(const T& configSource); 74 75 status_t setDefaultDevice(audio_devices_t device); 76 77 void filterOutputDevicesForStrategy(legacy_strategy strategy, 78 DeviceVector& availableOutputDevices, 79 const SwAudioOutputCollection &outputs) const; 80 81 product_strategy_t remapStrategyFromContext(product_strategy_t strategy, 82 const SwAudioOutputCollection &outputs) const; 83 84 DeviceVector getDevicesForStrategyInt(legacy_strategy strategy, 85 DeviceVector availableOutputDevices, 86 const SwAudioOutputCollection &outputs) const; 87 88 sp<DeviceDescriptor> getDeviceForInputSource(audio_source_t inputSource) const; 89 90 product_strategy_t getProductStrategyFromLegacy(legacy_strategy legacyStrategy) const; 91 audio_devices_t getPreferredDeviceTypeForLegacyStrategy( 92 const DeviceVector& availableOutputDevices, legacy_strategy legacyStrategy) const; 93 DeviceVector getPreferredAvailableDevicesForInputSource( 94 const DeviceVector& availableInputDevices, audio_source_t inputSource) const; 95 DeviceVector getDisabledDevicesForInputSource( 96 const DeviceVector& availableInputDevices, audio_source_t inputSource) const; 97 98 bool isBtScoActive(DeviceVector& availableOutputDevices) const; 99 100 std::map<product_strategy_t, legacy_strategy> mLegacyStrategyMap; 101 }; 102 } // namespace audio_policy 103 } // namespace android 104