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      1 /*
      2  * Copyright (C) 2018 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 <EngineConfig.h>
     20 #include <AudioPolicyManagerInterface.h>
     21 #include <ProductStrategy.h>
     22 #include <VolumeGroup.h>
     23 
     24 namespace android {
     25 namespace audio_policy {
     26 
     27 class EngineBase : public AudioPolicyManagerInterface
     28 {
     29 public:
     30     ///
     31     /// from AudioPolicyManagerInterface
     32     ///
     33     android::status_t initCheck() override;
     34 
     35     void setObserver(AudioPolicyManagerObserver *observer) override;
     36 
     37     status_t setPhoneState(audio_mode_t mode) override;
     38 
     39     audio_mode_t getPhoneState() const override { return mPhoneState; }
     40 
     41     status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config) override
     42     {
     43         mForceUse[usage] = config;
     44         return NO_ERROR;
     45     }
     46 
     47     audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage) const override
     48     {
     49         return mForceUse[usage];
     50     }
     51     android::status_t setDeviceConnectionState(const sp<DeviceDescriptor> /*devDesc*/,
     52                                                audio_policy_dev_state_t /*state*/) override
     53     {
     54         return NO_ERROR;
     55     }
     56     product_strategy_t getProductStrategyForAttributes(
     57             const audio_attributes_t &attr) const override;
     58 
     59     audio_stream_type_t getStreamTypeForAttributes(const audio_attributes_t &attr) const override;
     60 
     61     audio_attributes_t getAttributesForStreamType(audio_stream_type_t stream) const override;
     62 
     63     StreamTypeVector getStreamTypesForProductStrategy(product_strategy_t ps) const override;
     64 
     65     AttributesVector getAllAttributesForProductStrategy(product_strategy_t ps) const override;
     66 
     67     StrategyVector getOrderedProductStrategies() const override;
     68 
     69     status_t listAudioProductStrategies(AudioProductStrategyVector &strategies) const override;
     70 
     71     VolumeCurves *getVolumeCurvesForAttributes(const audio_attributes_t &attr) const override;
     72 
     73     VolumeCurves *getVolumeCurvesForStreamType(audio_stream_type_t stream) const override;
     74 
     75     IVolumeCurves *getVolumeCurvesForVolumeGroup(volume_group_t group) const override
     76     {
     77        return mVolumeGroups.find(group) != end(mVolumeGroups) ?
     78                    mVolumeGroups.at(group)->getVolumeCurves() : nullptr;
     79     }
     80 
     81     VolumeGroupVector getVolumeGroups() const override;
     82 
     83     volume_group_t getVolumeGroupForAttributes(const audio_attributes_t &attr) const override;
     84 
     85     volume_group_t getVolumeGroupForStreamType(audio_stream_type_t stream) const override;
     86 
     87     status_t listAudioVolumeGroups(AudioVolumeGroupVector &groups) const override;
     88 
     89     void dump(String8 *dst) const override;
     90 
     91 
     92     engineConfig::ParsingResult loadAudioPolicyEngineConfig();
     93 
     94     const ProductStrategyMap &getProductStrategies() const { return mProductStrategies; }
     95 
     96     ProductStrategyMap &getProductStrategies() { return mProductStrategies; }
     97 
     98     product_strategy_t getProductStrategyForStream(audio_stream_type_t stream) const;
     99 
    100     product_strategy_t getProductStrategyByName(const std::string &name) const;
    101 
    102     AudioPolicyManagerObserver *getApmObserver() const { return mApmObserver; }
    103 
    104     inline bool isInCall() const
    105     {
    106         return is_state_in_call(getPhoneState());
    107     }
    108 
    109     VolumeSource toVolumeSource(audio_stream_type_t stream) const
    110     {
    111         return static_cast<VolumeSource>(getVolumeGroupForStreamType(stream));
    112     }
    113 
    114     status_t switchVolumeCurve(audio_stream_type_t streamSrc, audio_stream_type_t streamDst);
    115 
    116     status_t restoreOriginVolumeCurve(audio_stream_type_t stream);
    117 
    118  private:
    119     AudioPolicyManagerObserver *mApmObserver = nullptr;
    120 
    121     ProductStrategyMap mProductStrategies;
    122     VolumeGroupMap mVolumeGroups;
    123     audio_mode_t mPhoneState = AUDIO_MODE_NORMAL;  /**< current phone state. */
    124 
    125     /** current forced use configuration. */
    126     audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT] = {};
    127 };
    128 
    129 } // namespace audio_policy
    130 } // namespace android
    131