/*
* 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 <cutils/misc.h>
#include <cutils/config_utils.h>
#include <cutils/compiler.h>
#include <utils/String8.h>
#include <utils/Vector.h>
#include <utils/SortedVector.h>
#include <binder/BinderService.h>
#include <binder/IUidObserver.h>
#include <system/audio.h>
#include <system/audio_policy.h>
#include <media/IAudioPolicyService.h>
#include <media/ToneGenerator.h>
#include <media/AudioEffect.h>
#include <media/AudioPolicy.h>
#include <mediautils/ServiceUtilities.h>
#include "AudioPolicyEffects.h"
#include <AudioPolicyInterface.h>
#include <android/hardware/BnSensorPrivacyListener.h>
#include <unordered_map>
namespace android {
// ----------------------------------------------------------------------------
class AudioPolicyService :
public BinderService<AudioPolicyService>,
public BnAudioPolicyService,
public IBinder::DeathRecipient
{
friend class BinderService<AudioPolicyService>;
public:
// for BinderService
static const char *getServiceName() ANDROID_API { return "media.audio_policy"; }
virtual status_t dump(int fd, const Vector<String16>& 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<audio_io_handle_t> *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<int>& 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<IBinder>& 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<IAudioPolicyServiceClient>& 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<AudioMix>& mixes, bool registration);
virtual status_t setUidDeviceAffinities(uid_t uid, const Vector<AudioDeviceTypeAddr>& 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<audio_format_t> *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<uid_t>& 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<effect_descriptor_t> clientEffects,
const audio_config_base_t *deviceConfig,
std::vector<effect_descriptor_t> 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<effect_descriptor_t> clientEffects,
const audio_config_base_t *deviceConfig,
std::vector<effect_descriptor_t> 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<String16>& 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<String16>& args, int err);
// Clears the override for the UID state
status_t handleResetUidState(Vector<String16>& args, int err);
// Gets the UID state
status_t handleGetUidState(Vector<String16>& 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>& 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<AudioPolicyService> service)
: mService(service), mObserverRegistered(false),
mAssistantUid(0), mRttEnabled(false) {}
void registerSelf();
void unregisterSelf();
// IBinder::DeathRecipient implementation
void binderDied(const wp<IBinder> &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<uid_t>& 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<uid_t, std::pair<bool, int>> *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<uid_t, std::pair<bool, int>> *uids,
uid_t uid, bool active, int state, bool insert);
void checkRegistered();
wp<AudioPolicyService> mService;
Mutex mLock;
bool mObserverRegistered;
std::unordered_map<uid_t, std::pair<bool, int>> mOverrideUids;
std::unordered_map<uid_t, std::pair<bool, int>> mCachedUids;
uid_t mAssistantUid;
std::vector<uid_t> 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<AudioPolicyService> service)
: mService(service) {}
void registerSelf();
void unregisterSelf();
bool isSensorPrivacyEnabled();
binder::Status onSensorPrivacyChanged(bool enabled);
private:
wp<AudioPolicyService> 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<AudioPolicyService>& 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<AudioCommand>& command, int delayMs = 0);
void insertCommand_l(sp<AudioCommand>& 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<effect_descriptor_t> clientEffects,
const audio_config_base_t *deviceConfig,
std::vector<effect_descriptor_t> 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<AudioCommandData> 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<effect_descriptor_t> mClientEffects;
struct audio_config_base mDeviceConfig;
std::vector<effect_descriptor_t> 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<AudioCommand> > mAudioCommands; // list of pending commands
sp<AudioCommand> mLastCommand; // last processed command (used by dump)
String8 mName; // string used by wake lock fo delayed commands
wp<AudioPolicyService> 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<effect_descriptor_t> clientEffects,
const audio_config_base_t *deviceConfig,
std::vector<effect_descriptor_t> 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<AudioPolicyService>& service,
const sp<IAudioPolicyServiceClient>& 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<effect_descriptor_t> clientEffects,
const audio_config_base_t *deviceConfig,
std::vector<effect_descriptor_t> 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<IBinder>& who);
private:
NotificationClient(const NotificationClient&);
NotificationClient& operator = (const NotificationClient&);
const wp<AudioPolicyService> mService;
const uid_t mUid;
const pid_t mPid;
const sp<IAudioPolicyServiceClient> 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<AudioPlaybackClient>& client,
sp<AudioPolicyEffects>& 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<AudioCommandThread> mAudioCommandThread; // audio commands thread
sp<AudioCommandThread> mOutputCommandThread; // process stop and release output
struct audio_policy_device *mpAudioPolicyDev;
struct audio_policy *mpAudioPolicy;
AudioPolicyInterface *mAudioPolicyManager;
AudioPolicyClient *mAudioPolicyClient;
DefaultKeyedVector< int64_t, sp<NotificationClient> > 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<AudioPolicyEffects> mAudioPolicyEffects;
audio_mode_t mPhoneState;
sp<UidPolicy> mUidPolicy;
sp<SensorPrivacyPolicy> mSensorPrivacyPolicy;
DefaultKeyedVector< audio_port_handle_t, sp<AudioRecordClient> > mAudioRecordClients;
DefaultKeyedVector< audio_port_handle_t, sp<AudioPlaybackClient> > mAudioPlaybackClients;
MediaPackageManager mPackageManager; // To check allowPlaybackCapture
};
} // namespace android
#endif // ANDROID_AUDIOPOLICYSERVICE_H