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 <utils/RefBase.h> 20 #include <media/AudioPolicy.h> 21 #include <utils/KeyedVector.h> 22 #include <system/audio.h> 23 #include <utils/String8.h> 24 25 namespace android { 26 27 class SwAudioOutputDescriptor; 28 29 /** 30 * custom mix entry in mPolicyMixes 31 */ 32 class AudioPolicyMix : public AudioMix, public RefBase { 33 public: 34 AudioPolicyMix(const AudioMix &mix); 35 AudioPolicyMix(const AudioPolicyMix&) = delete; 36 AudioPolicyMix& operator=(const AudioPolicyMix&) = delete; 37 38 const sp<SwAudioOutputDescriptor> &getOutput() const; 39 40 void setOutput(sp<SwAudioOutputDescriptor> &output); 41 42 void clearOutput(); 43 44 status_t dump(int fd, int spaces, int index) const; 45 46 private: 47 sp<SwAudioOutputDescriptor> mOutput; // Corresponding output stream 48 }; 49 50 51 class AudioPolicyMixCollection : public DefaultKeyedVector<String8, sp<AudioPolicyMix> > 52 { 53 public: 54 status_t getAudioPolicyMix(const String8& address, sp<AudioPolicyMix> &policyMix) const; 55 56 status_t registerMix(const String8& address, AudioMix mix, sp<SwAudioOutputDescriptor> desc); 57 58 status_t unregisterMix(const String8& address); 59 60 void closeOutput(sp<SwAudioOutputDescriptor> &desc); 61 62 /** 63 * Try to find an output descriptor for the given attributes. 64 * 65 * @param[in] attributes to consider fowr the research of output descriptor. 66 * @param[out] desc to return if an output could be found. 67 * 68 * @return NO_ERROR if an output was found for the given attribute (in this case, the 69 * descriptor output param is initialized), error code otherwise. 70 */ 71 status_t getOutputForAttr(audio_attributes_t attributes, uid_t uid, 72 sp<SwAudioOutputDescriptor> &desc); 73 74 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 75 audio_devices_t availableDeviceTypes, 76 sp<AudioPolicyMix> *policyMix); 77 78 status_t getInputMixForAttr(audio_attributes_t attr, sp<AudioPolicyMix> *policyMix); 79 80 status_t dump(int fd) const; 81 }; 82 83 } // namespace android 84