/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_AUDIOPOLICYSERVICE_H #define ANDROID_AUDIOPOLICYSERVICE_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "AudioPolicyEffects.h" #include #include #include namespace android { // ---------------------------------------------------------------------------- class AudioPolicyService : public BinderService, public BnAudioPolicyService, public IBinder::DeathRecipient { friend class BinderService; public: // for BinderService static const char *getServiceName() ANDROID_API { return "media.audio_policy"; } virtual status_t dump(int fd, const Vector& args); // // BnAudioPolicyService (see AudioPolicyInterface for method descriptions) // virtual status_t setDeviceConnectionState(audio_devices_t device, audio_policy_dev_state_t state, const char *device_address, const char *device_name, audio_format_t encodedFormat); virtual audio_policy_dev_state_t getDeviceConnectionState( audio_devices_t device, const char *device_address); virtual status_t handleDeviceConfigChange(audio_devices_t device, const char *device_address, const char *device_name, audio_format_t encodedFormat); virtual status_t setPhoneState(audio_mode_t state); virtual status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config); virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); virtual audio_io_handle_t getOutput(audio_stream_type_t stream); status_t getOutputForAttr(audio_attributes_t *attr, audio_io_handle_t *output, audio_session_t session, audio_stream_type_t *stream, pid_t pid, uid_t uid, const audio_config_t *config, audio_output_flags_t flags, audio_port_handle_t *selectedDeviceId, audio_port_handle_t *portId, std::vector *secondaryOutputs) override; virtual status_t startOutput(audio_port_handle_t portId); virtual status_t stopOutput(audio_port_handle_t portId); virtual void releaseOutput(audio_port_handle_t portId); virtual status_t getInputForAttr(const audio_attributes_t *attr, audio_io_handle_t *input, audio_unique_id_t riid, audio_session_t session, pid_t pid, uid_t uid, const String16& opPackageName, const audio_config_base_t *config, audio_input_flags_t flags, audio_port_handle_t *selectedDeviceId = NULL, audio_port_handle_t *portId = NULL); virtual status_t startInput(audio_port_handle_t portId); virtual status_t stopInput(audio_port_handle_t portId); virtual void releaseInput(audio_port_handle_t portId); virtual status_t initStreamVolume(audio_stream_type_t stream, int indexMin, int indexMax); virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, int index, audio_devices_t device); virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, int *index, audio_devices_t device); virtual status_t setVolumeIndexForAttributes(const audio_attributes_t &attr, int index, audio_devices_t device); virtual status_t getVolumeIndexForAttributes(const audio_attributes_t &attr, int &index, audio_devices_t device); virtual status_t getMinVolumeIndexForAttributes(const audio_attributes_t &attr, int &index); virtual status_t getMaxVolumeIndexForAttributes(const audio_attributes_t &attr, int &index); virtual uint32_t getStrategyForStream(audio_stream_type_t stream); virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc); virtual status_t registerEffect(const effect_descriptor_t *desc, audio_io_handle_t io, uint32_t strategy, audio_session_t session, int id); virtual status_t unregisterEffect(int id); virtual status_t setEffectEnabled(int id, bool enabled); status_t moveEffectsToIo(const std::vector& ids, audio_io_handle_t io) override; virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; virtual bool isSourceActive(audio_source_t source) const; virtual status_t queryDefaultPreProcessing(audio_session_t audioSession, effect_descriptor_t *descriptors, uint32_t *count); virtual status_t addSourceDefaultEffect(const effect_uuid_t *type, const String16& opPackageName, const effect_uuid_t *uuid, int32_t priority, audio_source_t source, audio_unique_id_t* id); virtual status_t addStreamDefaultEffect(const effect_uuid_t *type, const String16& opPackageName, const effect_uuid_t *uuid, int32_t priority, audio_usage_t usage, audio_unique_id_t* id); virtual status_t removeSourceDefaultEffect(audio_unique_id_t id); virtual status_t removeStreamDefaultEffect(audio_unique_id_t id); virtual status_t onTransact( uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags); // IBinder::DeathRecipient virtual void binderDied(const wp& who); // RefBase virtual void onFirstRef(); // // Helpers for the struct audio_policy_service_ops implementation. // This is used by the audio policy manager for certain operations that // are implemented by the policy service. // virtual void setParameters(audio_io_handle_t ioHandle, const char *keyValuePairs, int delayMs); virtual status_t setStreamVolume(audio_stream_type_t stream, float volume, audio_io_handle_t output, int delayMs = 0); virtual status_t setVoiceVolume(float volume, int delayMs = 0); status_t setAllowedCapturePolicy(uint_t uid, audio_flags_mask_t capturePolicy) override; virtual bool isOffloadSupported(const audio_offload_info_t &config); virtual bool isDirectOutputSupported(const audio_config_base_t& config, const audio_attributes_t& attributes); virtual status_t listAudioPorts(audio_port_role_t role, audio_port_type_t type, unsigned int *num_ports, struct audio_port *ports, unsigned int *generation); virtual status_t getAudioPort(struct audio_port *port); virtual status_t createAudioPatch(const struct audio_patch *patch, audio_patch_handle_t *handle); virtual status_t releaseAudioPatch(audio_patch_handle_t handle); virtual status_t listAudioPatches(unsigned int *num_patches, struct audio_patch *patches, unsigned int *generation); virtual status_t setAudioPortConfig(const struct audio_port_config *config); virtual void registerClient(const sp& client); virtual void setAudioPortCallbacksEnabled(bool enabled); virtual void setAudioVolumeGroupCallbacksEnabled(bool enabled); virtual status_t acquireSoundTriggerSession(audio_session_t *session, audio_io_handle_t *ioHandle, audio_devices_t *device); virtual status_t releaseSoundTriggerSession(audio_session_t session); virtual audio_mode_t getPhoneState(); virtual status_t registerPolicyMixes(const Vector& mixes, bool registration); virtual status_t setUidDeviceAffinities(uid_t uid, const Vector& devices); virtual status_t removeUidDeviceAffinities(uid_t uid); virtual status_t startAudioSource(const struct audio_port_config *source, const audio_attributes_t *attributes, audio_port_handle_t *portId); virtual status_t stopAudioSource(audio_port_handle_t portId); virtual status_t setMasterMono(bool mono); virtual status_t getMasterMono(bool *mono); virtual float getStreamVolumeDB( audio_stream_type_t stream, int index, audio_devices_t device); virtual status_t getSurroundFormats(unsigned int *numSurroundFormats, audio_format_t *surroundFormats, bool *surroundFormatsEnabled, bool reported); virtual status_t getHwOffloadEncodingFormatsSupportedForA2DP( std::vector *formats); virtual status_t setSurroundFormatEnabled(audio_format_t audioFormat, bool enabled); virtual status_t setAssistantUid(uid_t uid); virtual status_t setA11yServicesUids(const std::vector& uids); virtual bool isHapticPlaybackSupported(); virtual status_t listAudioProductStrategies(AudioProductStrategyVector &strategies); virtual status_t getProductStrategyFromAudioAttributes(const AudioAttributes &aa, product_strategy_t &productStrategy); virtual status_t listAudioVolumeGroups(AudioVolumeGroupVector &groups); virtual status_t getVolumeGroupFromAudioAttributes(const AudioAttributes &aa, volume_group_t &volumeGroup); virtual status_t setRttEnabled(bool enabled); status_t doStopOutput(audio_port_handle_t portId); void doReleaseOutput(audio_port_handle_t portId); status_t clientCreateAudioPatch(const struct audio_patch *patch, audio_patch_handle_t *handle, int delayMs); status_t clientReleaseAudioPatch(audio_patch_handle_t handle, int delayMs); virtual status_t clientSetAudioPortConfig(const struct audio_port_config *config, int delayMs); void removeNotificationClient(uid_t uid, pid_t pid); void onAudioPortListUpdate(); void doOnAudioPortListUpdate(); void onAudioPatchListUpdate(); void doOnAudioPatchListUpdate(); void onDynamicPolicyMixStateUpdate(const String8& regId, int32_t state); void doOnDynamicPolicyMixStateUpdate(const String8& regId, int32_t state); void onRecordingConfigurationUpdate(int event, const record_client_info_t *clientInfo, const audio_config_base_t *clientConfig, std::vector clientEffects, const audio_config_base_t *deviceConfig, std::vector effects, audio_patch_handle_t patchHandle, audio_source_t source); void doOnRecordingConfigurationUpdate(int event, const record_client_info_t *clientInfo, const audio_config_base_t *clientConfig, std::vector clientEffects, const audio_config_base_t *deviceConfig, std::vector effects, audio_patch_handle_t patchHandle, audio_source_t source); void onAudioVolumeGroupChanged(volume_group_t group, int flags); void doOnAudioVolumeGroupChanged(volume_group_t group, int flags); void setEffectSuspended(int effectId, audio_session_t sessionId, bool suspended); private: AudioPolicyService() ANDROID_API; virtual ~AudioPolicyService(); status_t dumpInternals(int fd); // Handles binder shell commands virtual status_t shellCommand(int in, int out, int err, Vector& args); // Sets whether the given UID records only silence virtual void setAppState_l(uid_t uid, app_state_t state); // Overrides the UID state as if it is idle status_t handleSetUidState(Vector& args, int err); // Clears the override for the UID state status_t handleResetUidState(Vector& args, int err); // Gets the UID state status_t handleGetUidState(Vector& args, int out, int err); // Prints the shell command help status_t printHelp(int out); std::string getDeviceTypeStrForPortId(audio_port_handle_t portId); status_t getAudioPolicyEffects(sp& audioPolicyEffects); app_state_t apmStatFromAmState(int amState); void updateUidStates(); void updateUidStates_l(); void silenceAllRecordings_l(); static bool isPrivacySensitiveSource(audio_source_t source); static bool isVirtualSource(audio_source_t source); // If recording we need to make sure the UID is allowed to do that. If the UID is idle // then it cannot record and gets buffers with zeros - silence. As soon as the UID // transitions to an active state we will start reporting buffers with data. This approach // transparently handles recording while the UID transitions between idle/active state // avoiding to get stuck in a state receiving non-empty buffers while idle or in a state // receiving empty buffers while active. class UidPolicy : public BnUidObserver, public virtual IBinder::DeathRecipient { public: explicit UidPolicy(wp service) : mService(service), mObserverRegistered(false), mAssistantUid(0), mRttEnabled(false) {} void registerSelf(); void unregisterSelf(); // IBinder::DeathRecipient implementation void binderDied(const wp &who) override; bool isUidActive(uid_t uid); int getUidState(uid_t uid); void setAssistantUid(uid_t uid) { mAssistantUid = uid; } bool isAssistantUid(uid_t uid) { return uid == mAssistantUid; } void setA11yUids(const std::vector& uids) { mA11yUids.clear(); mA11yUids = uids; } bool isA11yUid(uid_t uid); bool isA11yOnTop(); void setRttEnabled(bool enabled) { mRttEnabled = enabled; } bool isRttEnabled() { return mRttEnabled; } // BnUidObserver implementation void onUidActive(uid_t uid) override; void onUidGone(uid_t uid, bool disabled) override; void onUidIdle(uid_t uid, bool disabled) override; void onUidStateChanged(uid_t uid, int32_t procState, int64_t procStateSeq); void addOverrideUid(uid_t uid, bool active) { updateOverrideUid(uid, active, true); } void removeOverrideUid(uid_t uid) { updateOverrideUid(uid, false, false); } void updateUid(std::unordered_map> *uids, uid_t uid, bool active, int state, bool insert); private: void notifyService(); void updateOverrideUid(uid_t uid, bool active, bool insert); void updateUidLocked(std::unordered_map> *uids, uid_t uid, bool active, int state, bool insert); void checkRegistered(); wp mService; Mutex mLock; bool mObserverRegistered; std::unordered_map> mOverrideUids; std::unordered_map> mCachedUids; uid_t mAssistantUid; std::vector mA11yUids; bool mRttEnabled; }; // If sensor privacy is enabled then all apps, including those that are active, should be // prevented from recording. This is handled similar to idle UIDs, any app that attempts // to record while sensor privacy is enabled will receive buffers with zeros. As soon as // sensor privacy is disabled active apps will receive the expected data when recording. class SensorPrivacyPolicy : public hardware::BnSensorPrivacyListener { public: explicit SensorPrivacyPolicy(wp service) : mService(service) {} void registerSelf(); void unregisterSelf(); bool isSensorPrivacyEnabled(); binder::Status onSensorPrivacyChanged(bool enabled); private: wp mService; std::atomic_bool mSensorPrivacyEnabled; }; // Thread used to send audio config commands to audio flinger // For audio config commands, it is necessary because audio flinger requires that the calling // process (user) has permission to modify audio settings. class AudioCommandThread : public Thread { class AudioCommand; public: // commands for tone AudioCommand enum { SET_VOLUME, SET_PARAMETERS, SET_VOICE_VOLUME, STOP_OUTPUT, RELEASE_OUTPUT, CREATE_AUDIO_PATCH, RELEASE_AUDIO_PATCH, UPDATE_AUDIOPORT_LIST, UPDATE_AUDIOPATCH_LIST, CHANGED_AUDIOVOLUMEGROUP, SET_AUDIOPORT_CONFIG, DYN_POLICY_MIX_STATE_UPDATE, RECORDING_CONFIGURATION_UPDATE, SET_EFFECT_SUSPENDED, }; AudioCommandThread (String8 name, const wp& service); virtual ~AudioCommandThread(); status_t dump(int fd); // Thread virtuals virtual void onFirstRef(); virtual bool threadLoop(); void exit(); status_t volumeCommand(audio_stream_type_t stream, float volume, audio_io_handle_t output, int delayMs = 0); status_t parametersCommand(audio_io_handle_t ioHandle, const char *keyValuePairs, int delayMs = 0); status_t voiceVolumeCommand(float volume, int delayMs = 0); void stopOutputCommand(audio_port_handle_t portId); void releaseOutputCommand(audio_port_handle_t portId); status_t sendCommand(sp& command, int delayMs = 0); void insertCommand_l(sp& command, int delayMs = 0); status_t createAudioPatchCommand(const struct audio_patch *patch, audio_patch_handle_t *handle, int delayMs); status_t releaseAudioPatchCommand(audio_patch_handle_t handle, int delayMs); void updateAudioPortListCommand(); void updateAudioPatchListCommand(); void changeAudioVolumeGroupCommand(volume_group_t group, int flags); status_t setAudioPortConfigCommand(const struct audio_port_config *config, int delayMs); void dynamicPolicyMixStateUpdateCommand(const String8& regId, int32_t state); void recordingConfigurationUpdateCommand( int event, const record_client_info_t *clientInfo, const audio_config_base_t *clientConfig, std::vector clientEffects, const audio_config_base_t *deviceConfig, std::vector effects, audio_patch_handle_t patchHandle, audio_source_t source); void setEffectSuspendedCommand(int effectId, audio_session_t sessionId, bool suspended); void insertCommand_l(AudioCommand *command, int delayMs = 0); private: class AudioCommandData; // descriptor for requested tone playback event class AudioCommand: public RefBase { public: AudioCommand() : mCommand(-1), mStatus(NO_ERROR), mWaitStatus(false) {} void dump(char* buffer, size_t size); int mCommand; // SET_VOLUME, SET_PARAMETERS... nsecs_t mTime; // time stamp Mutex mLock; // mutex associated to mCond Condition mCond; // condition for status return status_t mStatus; // command status bool mWaitStatus; // true if caller is waiting for status sp mParam; // command specific parameter data }; class AudioCommandData: public RefBase { public: virtual ~AudioCommandData() {} protected: AudioCommandData() {} }; class VolumeData : public AudioCommandData { public: audio_stream_type_t mStream; float mVolume; audio_io_handle_t mIO; }; class ParametersData : public AudioCommandData { public: audio_io_handle_t mIO; String8 mKeyValuePairs; }; class VoiceVolumeData : public AudioCommandData { public: float mVolume; }; class StopOutputData : public AudioCommandData { public: audio_port_handle_t mPortId; }; class ReleaseOutputData : public AudioCommandData { public: audio_port_handle_t mPortId; }; class CreateAudioPatchData : public AudioCommandData { public: struct audio_patch mPatch; audio_patch_handle_t mHandle; }; class ReleaseAudioPatchData : public AudioCommandData { public: audio_patch_handle_t mHandle; }; class AudioVolumeGroupData : public AudioCommandData { public: volume_group_t mGroup; int mFlags; }; class SetAudioPortConfigData : public AudioCommandData { public: struct audio_port_config mConfig; }; class DynPolicyMixStateUpdateData : public AudioCommandData { public: String8 mRegId; int32_t mState; }; class RecordingConfigurationUpdateData : public AudioCommandData { public: int mEvent; record_client_info_t mClientInfo; struct audio_config_base mClientConfig; std::vector mClientEffects; struct audio_config_base mDeviceConfig; std::vector mEffects; audio_patch_handle_t mPatchHandle; audio_source_t mSource; }; class SetEffectSuspendedData : public AudioCommandData { public: int mEffectId; audio_session_t mSessionId; bool mSuspended; }; Mutex mLock; Condition mWaitWorkCV; Vector < sp > mAudioCommands; // list of pending commands sp mLastCommand; // last processed command (used by dump) String8 mName; // string used by wake lock fo delayed commands wp mService; }; class AudioPolicyClient : public AudioPolicyClientInterface { public: explicit AudioPolicyClient(AudioPolicyService *service) : mAudioPolicyService(service) {} virtual ~AudioPolicyClient() {} // // Audio HW module functions // // loads a HW module. virtual audio_module_handle_t loadHwModule(const char *name); // // Audio output Control functions // // opens an audio output with the requested parameters. The parameter values can indicate to use the default values // in case the audio policy manager has no specific requirements for the output being opened. // When the function returns, the parameter values reflect the actual values used by the audio hardware output stream. // The audio policy manager can check if the proposed parameters are suitable or not and act accordingly. virtual status_t openOutput(audio_module_handle_t module, audio_io_handle_t *output, audio_config_t *config, audio_devices_t *devices, const String8& address, uint32_t *latencyMs, audio_output_flags_t flags); // creates a special output that is duplicated to the two outputs passed as arguments. The duplication is performed by // a special mixer thread in the AudioFlinger. virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2); // closes the output stream virtual status_t closeOutput(audio_io_handle_t output); // suspends the output. When an output is suspended, the corresponding audio hardware output stream is placed in // standby and the AudioTracks attached to the mixer thread are still processed but the output mix is discarded. virtual status_t suspendOutput(audio_io_handle_t output); // restores a suspended output. virtual status_t restoreOutput(audio_io_handle_t output); // // Audio input Control functions // // opens an audio input virtual audio_io_handle_t openInput(audio_module_handle_t module, audio_io_handle_t *input, audio_config_t *config, audio_devices_t *devices, const String8& address, audio_source_t source, audio_input_flags_t flags); // closes an audio input virtual status_t closeInput(audio_io_handle_t input); // // misc control functions // // set a stream volume for a particular output. For the same user setting, a given stream type can have different volumes // for each output (destination device) it is attached to. virtual status_t setStreamVolume(audio_stream_type_t stream, float volume, audio_io_handle_t output, int delayMs = 0); // invalidate a stream type, causing a reroute to an unspecified new output virtual status_t invalidateStream(audio_stream_type_t stream); // function enabling to send proprietary informations directly from audio policy manager to audio hardware interface. virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs, int delayMs = 0); // function enabling to receive proprietary informations directly from audio hardware interface to audio policy manager. virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys); // set down link audio volume. virtual status_t setVoiceVolume(float volume, int delayMs = 0); // move effect to the specified output virtual status_t moveEffects(audio_session_t session, audio_io_handle_t srcOutput, audio_io_handle_t dstOutput); void setEffectSuspended(int effectId, audio_session_t sessionId, bool suspended) override; /* Create a patch between several source and sink ports */ virtual status_t createAudioPatch(const struct audio_patch *patch, audio_patch_handle_t *handle, int delayMs); /* Release a patch */ virtual status_t releaseAudioPatch(audio_patch_handle_t handle, int delayMs); /* Set audio port configuration */ virtual status_t setAudioPortConfig(const struct audio_port_config *config, int delayMs); virtual void onAudioPortListUpdate(); virtual void onAudioPatchListUpdate(); virtual void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state); virtual void onRecordingConfigurationUpdate(int event, const record_client_info_t *clientInfo, const audio_config_base_t *clientConfig, std::vector clientEffects, const audio_config_base_t *deviceConfig, std::vector effects, audio_patch_handle_t patchHandle, audio_source_t source); virtual void onAudioVolumeGroupChanged(volume_group_t group, int flags); virtual audio_unique_id_t newAudioUniqueId(audio_unique_id_use_t use); private: AudioPolicyService *mAudioPolicyService; }; // --- Notification Client --- class NotificationClient : public IBinder::DeathRecipient { public: NotificationClient(const sp& service, const sp& client, uid_t uid, pid_t pid); virtual ~NotificationClient(); void onAudioPortListUpdate(); void onAudioPatchListUpdate(); void onDynamicPolicyMixStateUpdate(const String8& regId, int32_t state); void onAudioVolumeGroupChanged(volume_group_t group, int flags); void onRecordingConfigurationUpdate( int event, const record_client_info_t *clientInfo, const audio_config_base_t *clientConfig, std::vector clientEffects, const audio_config_base_t *deviceConfig, std::vector effects, audio_patch_handle_t patchHandle, audio_source_t source); void setAudioPortCallbacksEnabled(bool enabled); void setAudioVolumeGroupCallbacksEnabled(bool enabled); uid_t uid() { return mUid; } // IBinder::DeathRecipient virtual void binderDied(const wp& who); private: NotificationClient(const NotificationClient&); NotificationClient& operator = (const NotificationClient&); const wp mService; const uid_t mUid; const pid_t mPid; const sp mAudioPolicyServiceClient; bool mAudioPortCallbacksEnabled; bool mAudioVolumeGroupCallbacksEnabled; }; class AudioClient : public virtual RefBase { public: AudioClient(const audio_attributes_t attributes, const audio_io_handle_t io, uid_t uid, pid_t pid, const audio_session_t session, const audio_port_handle_t deviceId) : attributes(attributes), io(io), uid(uid), pid(pid), session(session), deviceId(deviceId), active(false) {} ~AudioClient() override = default; const audio_attributes_t attributes; // source, flags ... const audio_io_handle_t io; // audio HAL stream IO handle const uid_t uid; // client UID const pid_t pid; // client PID const audio_session_t session; // audio session ID const audio_port_handle_t deviceId; // selected input device port ID bool active; // Playback/Capture is active or inactive }; // --- AudioRecordClient --- // Information about each registered AudioRecord client // (between calls to getInputForAttr() and releaseInput()) class AudioRecordClient : public AudioClient { public: AudioRecordClient(const audio_attributes_t attributes, const audio_io_handle_t io, uid_t uid, pid_t pid, const audio_session_t session, const audio_port_handle_t deviceId, const String16& opPackageName, bool canCaptureOutput, bool canCaptureHotword) : AudioClient(attributes, io, uid, pid, session, deviceId), opPackageName(opPackageName), startTimeNs(0), canCaptureOutput(canCaptureOutput), canCaptureHotword(canCaptureHotword) {} ~AudioRecordClient() override = default; const String16 opPackageName; // client package name nsecs_t startTimeNs; const bool canCaptureOutput; const bool canCaptureHotword; }; // --- AudioPlaybackClient --- // Information about each registered AudioTrack client // (between calls to getOutputForAttr() and releaseOutput()) class AudioPlaybackClient : public AudioClient { public: AudioPlaybackClient(const audio_attributes_t attributes, const audio_io_handle_t io, uid_t uid, pid_t pid, const audio_session_t session, audio_port_handle_t deviceId, audio_stream_type_t stream) : AudioClient(attributes, io, uid, pid, session, deviceId), stream(stream) {} ~AudioPlaybackClient() override = default; const audio_stream_type_t stream; }; void getPlaybackClientAndEffects(audio_port_handle_t portId, sp& client, sp& effects, const char *context); // A class automatically clearing and restoring binder caller identity inside // a code block (scoped variable) // Declare one systematically before calling AudioPolicyManager methods so that they are // executed with the same level of privilege as audioserver process. class AutoCallerClear { public: AutoCallerClear() : mToken(IPCThreadState::self()->clearCallingIdentity()) {} ~AutoCallerClear() { IPCThreadState::self()->restoreCallingIdentity(mToken); } private: const int64_t mToken; }; // Internal dump utilities. status_t dumpPermissionDenial(int fd); mutable Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing // device connection state or routing // Note: lock acquisition order is always mLock > mEffectsLock: // mLock protects AudioPolicyManager methods that can call into audio flinger // and possibly back in to audio policy service and acquire mEffectsLock. sp mAudioCommandThread; // audio commands thread sp mOutputCommandThread; // process stop and release output struct audio_policy_device *mpAudioPolicyDev; struct audio_policy *mpAudioPolicy; AudioPolicyInterface *mAudioPolicyManager; AudioPolicyClient *mAudioPolicyClient; DefaultKeyedVector< int64_t, sp > mNotificationClients; Mutex mNotificationClientsLock; // protects mNotificationClients // Manage all effects configured in audio_effects.conf // never hold AudioPolicyService::mLock when calling AudioPolicyEffects methods as // those can call back into AudioPolicyService methods and try to acquire the mutex sp mAudioPolicyEffects; audio_mode_t mPhoneState; sp mUidPolicy; sp mSensorPrivacyPolicy; DefaultKeyedVector< audio_port_handle_t, sp > mAudioRecordClients; DefaultKeyedVector< audio_port_handle_t, sp > mAudioPlaybackClients; MediaPackageManager mPackageManager; // To check allowPlaybackCapture }; } // namespace android #endif // ANDROID_AUDIOPOLICYSERVICE_H