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 enum legacy_strategy { 32 STRATEGY_NONE = -1, 33 STRATEGY_MEDIA, 34 STRATEGY_PHONE, 35 STRATEGY_SONIFICATION, 36 STRATEGY_SONIFICATION_RESPECTFUL, 37 STRATEGY_DTMF, 38 STRATEGY_ENFORCED_AUDIBLE, 39 STRATEGY_TRANSMITTED_THROUGH_SPEAKER, 40 STRATEGY_ACCESSIBILITY, 41 STRATEGY_REROUTING, 42 STRATEGY_CALL_ASSISTANT, 43 }; 44 45 class Engine : public EngineBase 46 { 47 public: 48 Engine(); 49 virtual ~Engine() = default; 50 51 private: 52 /// 53 /// from EngineBase, so from EngineInterface 54 /// 55 status_t setForceUse(audio_policy_force_use_t usage, 56 audio_policy_forced_cfg_t config) override; 57 58 DeviceVector getOutputDevicesForAttributes(const audio_attributes_t &attr, 59 const sp<DeviceDescriptor> &preferedDevice = nullptr, 60 bool fromCache = false) const override; 61 62 DeviceVector getOutputDevicesForStream(audio_stream_type_t stream, 63 bool fromCache = false) const override; 64 65 sp<DeviceDescriptor> getInputDeviceForAttributes(const audio_attributes_t &attr, 66 uid_t uid = 0, 67 sp<AudioPolicyMix> *mix = nullptr) 68 const override; 69 70 void updateDeviceSelectionCache() override; 71 72 private: 73 /* Copy facilities are put private to disable copy. */ 74 Engine(const Engine &object); 75 Engine &operator=(const Engine &object); 76 77 status_t setDefaultDevice(audio_devices_t device); 78 79 void filterOutputDevicesForStrategy(legacy_strategy strategy, 80 DeviceVector& availableOutputDevices, 81 const SwAudioOutputCollection &outputs) const; 82 83 product_strategy_t remapStrategyFromContext(product_strategy_t strategy, 84 const SwAudioOutputCollection &outputs) const; 85 86 DeviceVector getDevicesForStrategyInt(legacy_strategy strategy, 87 DeviceVector availableOutputDevices, 88 const SwAudioOutputCollection &outputs) const; 89 90 DeviceVector getDevicesForProductStrategy(product_strategy_t strategy) const; 91 92 sp<DeviceDescriptor> getDeviceForInputSource(audio_source_t inputSource) const; 93 94 product_strategy_t getProductStrategyFromLegacy(legacy_strategy legacyStrategy) const; 95 audio_devices_t getPreferredDeviceTypeForLegacyStrategy( 96 const DeviceVector& availableOutputDevices, legacy_strategy legacyStrategy) const; 97 DeviceVector getPreferredAvailableDevicesForProductStrategy( 98 const DeviceVector& availableOutputDevices, product_strategy_t strategy) const; 99 100 DeviceStrategyMap mDevicesForStrategies; 101 102 std::map<product_strategy_t, legacy_strategy> mLegacyStrategyMap; 103 }; 104 } // namespace audio_policy 105 } // namespace android 106 107