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 "AudioPort.h" 20 #include "AudioSession.h" 21 #include "AudioSessionInfoProvider.h" 22 #include <utils/Errors.h> 23 #include <system/audio.h> 24 #include <utils/SortedVector.h> 25 #include <utils/KeyedVector.h> 26 27 namespace android { 28 29 class IOProfile; 30 class AudioPolicyMix; 31 32 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 33 // and keep track of the usage of this input. 34 class AudioInputDescriptor: public AudioPortConfig, public AudioSessionInfoProvider 35 { 36 public: 37 explicit AudioInputDescriptor(const sp<IOProfile>& profile); 38 void setIoHandle(audio_io_handle_t ioHandle); 39 audio_port_handle_t getId() const; 40 audio_module_handle_t getModuleHandle() const; 41 uint32_t getOpenRefCount() const; 42 43 status_t dump(int fd); 44 45 audio_io_handle_t mIoHandle; // input handle 46 audio_devices_t mDevice; // current device this input is routed to 47 wp<AudioPolicyMix> mPolicyMix; // non NULL when used by a dynamic policy 48 const sp<IOProfile> mProfile; // I/O profile this output derives from 49 50 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 51 const struct audio_port_config *srcConfig = NULL) const; getAudioPort()52 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 53 void toAudioPort(struct audio_port *port) const; 54 void setPreemptedSessions(const SortedVector<audio_session_t>& sessions); 55 SortedVector<audio_session_t> getPreemptedSessions() const; 56 bool hasPreemptedSession(audio_session_t session) const; 57 void clearPreemptedSessions(); 58 bool isActive() const; 59 bool isSourceActive(audio_source_t source) const; 60 audio_source_t inputSource(bool activeOnly = false) const; 61 bool isSoundTrigger() const; 62 status_t addAudioSession(audio_session_t session, 63 const sp<AudioSession>& audioSession); 64 status_t removeAudioSession(audio_session_t session); 65 sp<AudioSession> getAudioSession(audio_session_t session) const; 66 AudioSessionCollection getAudioSessions(bool activeOnly) const; 67 size_t getAudioSessionCount(bool activeOnly) const; 68 audio_source_t getHighestPrioritySource(bool activeOnly) const; 69 70 // implementation of AudioSessionInfoProvider 71 virtual audio_config_base_t getConfig() const; 72 virtual audio_patch_handle_t getPatchHandle() const; 73 74 void setPatchHandle(audio_patch_handle_t handle); 75 76 private: 77 audio_patch_handle_t mPatchHandle; 78 audio_port_handle_t mId; 79 // audio sessions attached to this input 80 AudioSessionCollection mSessions; 81 // Because a preemptible capture session can preempt another one, we end up in an endless loop 82 // situation were each session is allowed to restart after being preempted, 83 // thus preempting the other one which restarts and so on. 84 // To avoid this situation, we store which audio session was preempted when 85 // a particular input started and prevent preemption of this active input by this session. 86 // We also inherit sessions from the preempted input to avoid a 3 way preemption loop etc... 87 SortedVector<audio_session_t> mPreemptedSessions; 88 }; 89 90 class AudioInputCollection : 91 public DefaultKeyedVector< audio_io_handle_t, sp<AudioInputDescriptor> > 92 { 93 public: 94 bool isSourceActive(audio_source_t source) const; 95 96 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 97 98 // count active capture sessions using one of the specified devices. 99 // ignore devices if AUDIO_DEVICE_IN_DEFAULT is passed 100 uint32_t activeInputsCountOnDevices(audio_devices_t devices = AUDIO_DEVICE_IN_DEFAULT) const; 101 102 /** 103 * return io handle of active input or 0 if no input is active 104 * Only considers inputs from physical devices (e.g. main mic, headset mic) when 105 * ignoreVirtualInputs is true. 106 */ 107 Vector<sp <AudioInputDescriptor> > getActiveInputs(bool ignoreVirtualInputs = true); 108 109 audio_devices_t getSupportedDevices(audio_io_handle_t handle) const; 110 111 status_t dump(int fd) const; 112 }; 113 114 115 }; // namespace android 116