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 "AudioPolicyManagerInterface.h" 21 #include <AudioGain.h> 22 #include <policy.h> 23 24 namespace android 25 { 26 27 class AudioPolicyManagerObserver; 28 29 namespace audio_policy 30 { 31 32 enum legacy_strategy { 33 STRATEGY_NONE = -1, 34 STRATEGY_MEDIA, 35 STRATEGY_PHONE, 36 STRATEGY_SONIFICATION, 37 STRATEGY_SONIFICATION_RESPECTFUL, 38 STRATEGY_DTMF, 39 STRATEGY_ENFORCED_AUDIBLE, 40 STRATEGY_TRANSMITTED_THROUGH_SPEAKER, 41 STRATEGY_ACCESSIBILITY, 42 STRATEGY_REROUTING, 43 }; 44 45 class Engine : public EngineBase 46 { 47 public: 48 Engine(); 49 virtual ~Engine() = default; 50 51 template <class RequestedInterface> 52 RequestedInterface *queryInterface(); 53 54 private: 55 /// 56 /// from EngineBase, so from AudioPolicyManagerInterface 57 /// 58 status_t setForceUse(audio_policy_force_use_t usage, 59 audio_policy_forced_cfg_t config) override; 60 61 DeviceVector getOutputDevicesForAttributes(const audio_attributes_t &attr, 62 const sp<DeviceDescriptor> &preferedDevice = nullptr, 63 bool fromCache = false) const override; 64 65 DeviceVector getOutputDevicesForStream(audio_stream_type_t stream, 66 bool fromCache = false) const override; 67 68 sp<DeviceDescriptor> getInputDeviceForAttributes( 69 const audio_attributes_t &attr, sp<AudioPolicyMix> *mix = nullptr) const override; 70 71 void updateDeviceSelectionCache() override; 72 73 private: 74 /* Copy facilities are put private to disable copy. */ 75 Engine(const Engine &object); 76 Engine &operator=(const Engine &object); 77 78 status_t setDefaultDevice(audio_devices_t device); 79 80 audio_devices_t getDeviceForStrategyInt(legacy_strategy strategy, 81 DeviceVector availableOutputDevices, 82 DeviceVector availableInputDevices, 83 const SwAudioOutputCollection &outputs, 84 uint32_t outputDeviceTypesToIgnore) const; 85 86 DeviceVector getDevicesForProductStrategy(product_strategy_t strategy) const; 87 88 audio_devices_t getDeviceForInputSource(audio_source_t inputSource) const; 89 90 DeviceStrategyMap mDevicesForStrategies; 91 92 std::map<product_strategy_t, legacy_strategy> mLegacyStrategyMap; 93 }; 94 } // namespace audio_policy 95 } // namespace android 96 97