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1  /*
2   * Copyright (C) 2009 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  
18  #include <stdint.h>
19  #include <sys/types.h>
20  #include <cutils/config_utils.h>
21  #include <cutils/misc.h>
22  #include <utils/Timers.h>
23  #include <utils/Errors.h>
24  #include <utils/KeyedVector.h>
25  #include <utils/SortedVector.h>
26  #include <hardware_legacy/AudioPolicyInterface.h>
27  
28  
29  namespace android_audio_legacy {
30      using android::KeyedVector;
31      using android::DefaultKeyedVector;
32      using android::SortedVector;
33  
34  // ----------------------------------------------------------------------------
35  
36  #define MAX_DEVICE_ADDRESS_LEN 20
37  // Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB
38  #define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5
39  // Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB
40  #define SONIFICATION_HEADSET_VOLUME_MIN  0.016
41  // Time in milliseconds during which we consider that music is still active after a music
42  // track was stopped - see computeVolume()
43  #define SONIFICATION_HEADSET_MUSIC_DELAY  5000
44  // Time in milliseconds after media stopped playing during which we consider that the
45  // sonification should be as unobtrusive as during the time media was playing.
46  #define SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY 5000
47  // Time in milliseconds during witch some streams are muted while the audio path
48  // is switched
49  #define MUTE_TIME_MS 2000
50  
51  #define NUM_TEST_OUTPUTS 5
52  
53  #define NUM_VOL_CURVE_KNEES 2
54  
55  // Default minimum length allowed for offloading a compressed track
56  // Can be overridden by the audio.offload.min.duration.secs property
57  #define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60
58  
59  // ----------------------------------------------------------------------------
60  // AudioPolicyManagerBase implements audio policy manager behavior common to all platforms.
61  // Each platform must implement an AudioPolicyManager class derived from AudioPolicyManagerBase
62  // and override methods for which the platform specific behavior differs from the implementation
63  // in AudioPolicyManagerBase. Even if no specific behavior is required, the AudioPolicyManager
64  // class must be implemented as well as the class factory function createAudioPolicyManager()
65  // and provided in a shared library libaudiopolicy.so.
66  // ----------------------------------------------------------------------------
67  
68  class AudioPolicyManagerBase: public AudioPolicyInterface
69  #ifdef AUDIO_POLICY_TEST
70      , public Thread
71  #endif //AUDIO_POLICY_TEST
72  {
73  
74  public:
75                  AudioPolicyManagerBase(AudioPolicyClientInterface *clientInterface);
76          virtual ~AudioPolicyManagerBase();
77  
78          // AudioPolicyInterface
79          virtual status_t setDeviceConnectionState(audio_devices_t device,
80                                                            AudioSystem::device_connection_state state,
81                                                            const char *device_address);
82          virtual AudioSystem::device_connection_state getDeviceConnectionState(audio_devices_t device,
83                                                                                const char *device_address);
84          virtual void setPhoneState(int state);
85          virtual void setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config);
86          virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage);
87          virtual void setSystemProperty(const char* property, const char* value);
88          virtual status_t initCheck();
89          virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream,
90                                              uint32_t samplingRate,
91                                              audio_format_t format,
92                                              audio_channel_mask_t channelMask,
93                                              AudioSystem::output_flags flags,
94                                              const audio_offload_info_t *offloadInfo);
95          virtual status_t startOutput(audio_io_handle_t output,
96                                       AudioSystem::stream_type stream,
97                                       int session = 0);
98          virtual status_t stopOutput(audio_io_handle_t output,
99                                      AudioSystem::stream_type stream,
100                                      int session = 0);
101          virtual void releaseOutput(audio_io_handle_t output);
102          virtual audio_io_handle_t getInput(int inputSource,
103                                              uint32_t samplingRate,
104                                              audio_format_t format,
105                                              audio_channel_mask_t channelMask,
106                                              AudioSystem::audio_in_acoustics acoustics);
107  
108          // indicates to the audio policy manager that the input starts being used.
109          virtual status_t startInput(audio_io_handle_t input);
110  
111          // indicates to the audio policy manager that the input stops being used.
112          virtual status_t stopInput(audio_io_handle_t input);
113          virtual void releaseInput(audio_io_handle_t input);
114          virtual void closeAllInputs();
115          virtual void initStreamVolume(AudioSystem::stream_type stream,
116                                                      int indexMin,
117                                                      int indexMax);
118          virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream,
119                                                int index,
120                                                audio_devices_t device);
121          virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream,
122                                                int *index,
123                                                audio_devices_t device);
124  
125          // return the strategy corresponding to a given stream type
126          virtual uint32_t getStrategyForStream(AudioSystem::stream_type stream);
127  
128          // return the enabled output devices for the given stream type
129          virtual audio_devices_t getDevicesForStream(AudioSystem::stream_type stream);
130  
131          virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL);
132          virtual status_t registerEffect(const effect_descriptor_t *desc,
133                                          audio_io_handle_t io,
134                                          uint32_t strategy,
135                                          int session,
136                                          int id);
137          virtual status_t unregisterEffect(int id);
138          virtual status_t setEffectEnabled(int id, bool enabled);
139  
140          virtual bool isStreamActive(int stream, uint32_t inPastMs = 0) const;
141          // return whether a stream is playing remotely, override to change the definition of
142          //   local/remote playback, used for instance by notification manager to not make
143          //   media players lose audio focus when not playing locally
144          virtual bool isStreamActiveRemotely(int stream, uint32_t inPastMs = 0) const;
145          virtual bool isSourceActive(audio_source_t source) const;
146  
147          virtual status_t dump(int fd);
148  
149          virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo);
150  
151  protected:
152  
153          enum routing_strategy {
154              STRATEGY_MEDIA,
155              STRATEGY_PHONE,
156              STRATEGY_SONIFICATION,
157              STRATEGY_SONIFICATION_RESPECTFUL,
158              STRATEGY_DTMF,
159              STRATEGY_ENFORCED_AUDIBLE,
160              NUM_STRATEGIES
161          };
162  
163          // 4 points to define the volume attenuation curve, each characterized by the volume
164          // index (from 0 to 100) at which they apply, and the attenuation in dB at that index.
165          // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl()
166  
167          enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4};
168  
169          class VolumeCurvePoint
170          {
171          public:
172              int mIndex;
173              float mDBAttenuation;
174          };
175  
176          // device categories used for volume curve management.
177          enum device_category {
178              DEVICE_CATEGORY_HEADSET,
179              DEVICE_CATEGORY_SPEAKER,
180              DEVICE_CATEGORY_EARPIECE,
181              DEVICE_CATEGORY_CNT
182          };
183  
184          class IOProfile;
185  
186          class HwModule {
187          public:
188                      HwModule(const char *name);
189                      ~HwModule();
190  
191              void dump(int fd);
192  
193              const char *const mName; // base name of the audio HW module (primary, a2dp ...)
194              audio_module_handle_t mHandle;
195              Vector <IOProfile *> mOutputProfiles; // output profiles exposed by this module
196              Vector <IOProfile *> mInputProfiles;  // input profiles exposed by this module
197          };
198  
199          // the IOProfile class describes the capabilities of an output or input stream.
200          // It is currently assumed that all combination of listed parameters are supported.
201          // It is used by the policy manager to determine if an output or input is suitable for
202          // a given use case,  open/close it accordingly and connect/disconnect audio tracks
203          // to/from it.
204          class IOProfile
205          {
206          public:
207              IOProfile(HwModule *module);
208              ~IOProfile();
209  
210              bool isCompatibleProfile(audio_devices_t device,
211                                       uint32_t samplingRate,
212                                       audio_format_t format,
213                                       audio_channel_mask_t channelMask,
214                                       audio_output_flags_t flags) const;
215  
216              void dump(int fd);
217              void log();
218  
219              // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats
220              // indicates the supported parameters should be read from the output stream
221              // after it is opened for the first time
222              Vector <uint32_t> mSamplingRates; // supported sampling rates
223              Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks
224              Vector <audio_format_t> mFormats; // supported audio formats
225              audio_devices_t mSupportedDevices; // supported devices (devices this output can be
226                                                 // routed to)
227              audio_output_flags_t mFlags; // attribute flags (e.g primary output,
228                                                  // direct output...). For outputs only.
229              HwModule *mModule;                     // audio HW module exposing this I/O stream
230          };
231  
232          // default volume curve
233          static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManagerBase::VOLCNT];
234          // default volume curve for media strategy
235          static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT];
236          // volume curve for media strategy on speakers
237          static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT];
238          // volume curve for sonification strategy on speakers
239          static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManagerBase::VOLCNT];
240          static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManagerBase::VOLCNT];
241          static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT];
242          static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManagerBase::VOLCNT];
243          static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT];
244          static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManagerBase::VOLCNT];
245          static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManagerBase::VOLCNT];
246          // default volume curves per stream and device category. See initializeVolumeCurves()
247          static const VolumeCurvePoint *sVolumeProfiles[AudioSystem::NUM_STREAM_TYPES][DEVICE_CATEGORY_CNT];
248  
249          // descriptor for audio outputs. Used to maintain current configuration of each opened audio output
250          // and keep track of the usage of this output by each audio stream type.
251          class AudioOutputDescriptor
252          {
253          public:
254              AudioOutputDescriptor(const IOProfile *profile);
255  
256              status_t    dump(int fd);
257  
258              audio_devices_t device() const;
259              void changeRefCount(AudioSystem::stream_type stream, int delta);
260  
isDuplicated()261              bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); }
262              audio_devices_t supportedDevices();
263              uint32_t latency();
264              bool sharesHwModuleWith(const AudioOutputDescriptor *outputDesc);
265              bool isActive(uint32_t inPastMs = 0) const;
266              bool isStreamActive(AudioSystem::stream_type stream,
267                                  uint32_t inPastMs = 0,
268                                  nsecs_t sysTime = 0) const;
269              bool isStrategyActive(routing_strategy strategy,
270                               uint32_t inPastMs = 0,
271                               nsecs_t sysTime = 0) const;
272  
273              audio_io_handle_t mId;              // output handle
274              uint32_t mSamplingRate;             //
275              audio_format_t mFormat;             //
276              audio_channel_mask_t mChannelMask;     // output configuration
277              uint32_t mLatency;                  //
278              audio_output_flags_t mFlags;   //
279              audio_devices_t mDevice;                   // current device this output is routed to
280              uint32_t mRefCount[AudioSystem::NUM_STREAM_TYPES]; // number of streams of each type using this output
281              nsecs_t mStopTime[AudioSystem::NUM_STREAM_TYPES];
282              AudioOutputDescriptor *mOutput1;    // used by duplicated outputs: first output
283              AudioOutputDescriptor *mOutput2;    // used by duplicated outputs: second output
284              float mCurVolume[AudioSystem::NUM_STREAM_TYPES];   // current stream volume
285              int mMuteCount[AudioSystem::NUM_STREAM_TYPES];     // mute request counter
286              const IOProfile *mProfile;          // I/O profile this output derives from
287              bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible
288                                                  // device selection. See checkDeviceMuteStrategies()
289              uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only)
290              bool mForceRouting; // Next routing for this output will be forced as current device routed is null
291          };
292  
293          // descriptor for audio inputs. Used to maintain current configuration of each opened audio input
294          // and keep track of the usage of this input.
295          class AudioInputDescriptor
296          {
297          public:
298              AudioInputDescriptor(const IOProfile *profile);
299  
300              status_t    dump(int fd);
301  
302              audio_io_handle_t mId;                      // input handle
303              uint32_t mSamplingRate;                     //
304              audio_format_t mFormat;                     // input configuration
305              audio_channel_mask_t mChannelMask;             //
306              audio_devices_t mDevice;                    // current device this input is routed to
307              uint32_t mRefCount;                         // number of AudioRecord clients using this output
308              int      mInputSource;                      // input source selected by application (mediarecorder.h)
309              const IOProfile *mProfile;                  // I/O profile this output derives from
310          };
311  
312          // stream descriptor used for volume control
313          class StreamDescriptor
314          {
315          public:
316              StreamDescriptor();
317  
318              int getVolumeIndex(audio_devices_t device);
319              void dump(int fd);
320  
321              int mIndexMin;      // min volume index
322              int mIndexMax;      // max volume index
323              KeyedVector<audio_devices_t, int> mIndexCur;   // current volume index per device
324              bool mCanBeMuted;   // true is the stream can be muted
325  
326              const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT];
327          };
328  
329          // stream descriptor used for volume control
330          class EffectDescriptor
331          {
332          public:
333  
334              status_t dump(int fd);
335  
336              int mIo;                // io the effect is attached to
337              routing_strategy mStrategy; // routing strategy the effect is associated to
338              int mSession;               // audio session the effect is on
339              effect_descriptor_t mDesc;  // effect descriptor
340              bool mEnabled;              // enabled state: CPU load being used or not
341          };
342  
343          void addOutput(audio_io_handle_t id, AudioOutputDescriptor *outputDesc);
344          void addInput(audio_io_handle_t id, AudioInputDescriptor *inputDesc);
345  
346          // return the strategy corresponding to a given stream type
347          static routing_strategy getStrategy(AudioSystem::stream_type stream);
348  
349          // return appropriate device for streams handled by the specified strategy according to current
350          // phone state, connected devices...
351          // if fromCache is true, the device is returned from mDeviceForStrategy[],
352          // otherwise it is determine by current state
353          // (device connected,phone state, force use, a2dp output...)
354          // This allows to:
355          //  1 speed up process when the state is stable (when starting or stopping an output)
356          //  2 access to either current device selection (fromCache == true) or
357          // "future" device selection (fromCache == false) when called from a context
358          //  where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND
359          //  before updateDevicesAndOutputs() is called.
360          virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy,
361                                                       bool fromCache);
362  
363          // change the route of the specified output. Returns the number of ms we have slept to
364          // allow new routing to take effect in certain cases.
365          uint32_t setOutputDevice(audio_io_handle_t output,
366                               audio_devices_t device,
367                               bool force = false,
368                               int delayMs = 0);
369  
370          // select input device corresponding to requested audio source
371          virtual audio_devices_t getDeviceForInputSource(int inputSource);
372  
373          // return io handle of active input or 0 if no input is active
374          //    Only considers inputs from physical devices (e.g. main mic, headset mic) when
375          //    ignoreVirtualInputs is true.
376          audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true);
377  
378          // initialize volume curves for each strategy and device category
379          void initializeVolumeCurves();
380  
381          // compute the actual volume for a given stream according to the requested index and a particular
382          // device
383          virtual float computeVolume(int stream, int index, audio_io_handle_t output, audio_devices_t device);
384  
385          // check that volume change is permitted, compute and send new volume to audio hardware
386          status_t checkAndSetVolume(int stream, int index, audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false);
387  
388          // apply all stream volumes to the specified output and device
389          void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false);
390  
391          // Mute or unmute all streams handled by the specified strategy on the specified output
392          void setStrategyMute(routing_strategy strategy,
393                               bool on,
394                               audio_io_handle_t output,
395                               int delayMs = 0,
396                               audio_devices_t device = (audio_devices_t)0);
397  
398          // Mute or unmute the stream on the specified output
399          void setStreamMute(int stream,
400                             bool on,
401                             audio_io_handle_t output,
402                             int delayMs = 0,
403                             audio_devices_t device = (audio_devices_t)0);
404  
405          // handle special cases for sonification strategy while in call: mute streams or replace by
406          // a special tone in the device used for communication
407          void handleIncallSonification(int stream, bool starting, bool stateChange);
408  
409          // true if device is in a telephony or VoIP call
410          virtual bool isInCall();
411  
412          // true if given state represents a device in a telephony or VoIP call
413          virtual bool isStateInCall(int state);
414  
415          // when a device is connected, checks if an open output can be routed
416          // to this device. If none is open, tries to open one of the available outputs.
417          // Returns an output suitable to this device or 0.
418          // when a device is disconnected, checks if an output is not used any more and
419          // returns its handle if any.
420          // transfers the audio tracks and effects from one output thread to another accordingly.
421          status_t checkOutputsForDevice(audio_devices_t device,
422                                         AudioSystem::device_connection_state state,
423                                         SortedVector<audio_io_handle_t>& outputs,
424                                         const String8 paramStr);
425  
426          status_t checkInputsForDevice(audio_devices_t device,
427                                        AudioSystem::device_connection_state state,
428                                        SortedVector<audio_io_handle_t>& inputs,
429                                        const String8 paramStr);
430  
431          // close an output and its companion duplicating output.
432          void closeOutput(audio_io_handle_t output);
433  
434          // checks and if necessary changes outputs used for all strategies.
435          // must be called every time a condition that affects the output choice for a given strategy
436          // changes: connected device, phone state, force use...
437          // Must be called before updateDevicesAndOutputs()
438          void checkOutputForStrategy(routing_strategy strategy);
439  
440          // Same as checkOutputForStrategy() but for a all strategies in order of priority
441          void checkOutputForAllStrategies();
442  
443          // manages A2DP output suspend/restore according to phone state and BT SCO usage
444          void checkA2dpSuspend();
445  
446          // returns the A2DP output handle if it is open or 0 otherwise
447          audio_io_handle_t getA2dpOutput();
448  
449          // selects the most appropriate device on output for current state
450          // must be called every time a condition that affects the device choice for a given output is
451          // changed: connected device, phone state, force use, output start, output stop..
452          // see getDeviceForStrategy() for the use of fromCache parameter
453  
454          audio_devices_t getNewDevice(audio_io_handle_t output, bool fromCache);
455          // updates cache of device used by all strategies (mDeviceForStrategy[])
456          // must be called every time a condition that affects the device choice for a given strategy is
457          // changed: connected device, phone state, force use...
458          // cached values are used by getDeviceForStrategy() if parameter fromCache is true.
459           // Must be called after checkOutputForAllStrategies()
460  
461          void updateDevicesAndOutputs();
462  
463          virtual uint32_t getMaxEffectsCpuLoad();
464          virtual uint32_t getMaxEffectsMemory();
465  #ifdef AUDIO_POLICY_TEST
466          virtual     bool        threadLoop();
467                      void        exit();
468          int testOutputIndex(audio_io_handle_t output);
469  #endif //AUDIO_POLICY_TEST
470  
471          status_t setEffectEnabled(EffectDescriptor *pDesc, bool enabled);
472  
473          // returns the category the device belongs to with regard to volume curve management
474          static device_category getDeviceCategory(audio_devices_t device);
475  
476          // extract one device relevant for volume control from multiple device selection
477          static audio_devices_t getDeviceForVolume(audio_devices_t device);
478  
479          SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device,
480                          DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> openOutputs);
481          bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
482                                             SortedVector<audio_io_handle_t>& outputs2);
483  
484          // mute/unmute strategies using an incompatible device combination
485          // if muting, wait for the audio in pcm buffer to be drained before proceeding
486          // if unmuting, unmute only after the specified delay
487          // Returns the number of ms waited
488          uint32_t  checkDeviceMuteStrategies(AudioOutputDescriptor *outputDesc,
489                                              audio_devices_t prevDevice,
490                                              uint32_t delayMs);
491  
492          audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs,
493                                         AudioSystem::output_flags flags);
494          IOProfile *getInputProfile(audio_devices_t device,
495                                     uint32_t samplingRate,
496                                     audio_format_t format,
497                                     audio_channel_mask_t channelMask);
498          IOProfile *getProfileForDirectOutput(audio_devices_t device,
499                                                         uint32_t samplingRate,
500                                                         audio_format_t format,
501                                                         audio_channel_mask_t channelMask,
502                                                         audio_output_flags_t flags);
503  
504          audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs);
505  
506          bool isNonOffloadableEffectEnabled();
507  
508          //
509          // Audio policy configuration file parsing (audio_policy.conf)
510          //
511          static uint32_t stringToEnum(const struct StringToEnum *table,
512                                       size_t size,
513                                       const char *name);
514          static bool stringToBool(const char *value);
515          static audio_output_flags_t parseFlagNames(char *name);
516          static audio_devices_t parseDeviceNames(char *name);
517          void loadSamplingRates(char *name, IOProfile *profile);
518          void loadFormats(char *name, IOProfile *profile);
519          void loadOutChannels(char *name, IOProfile *profile);
520          void loadInChannels(char *name, IOProfile *profile);
521          status_t loadOutput(cnode *root,  HwModule *module);
522          status_t loadInput(cnode *root,  HwModule *module);
523          void loadHwModule(cnode *root);
524          void loadHwModules(cnode *root);
525          void loadGlobalConfig(cnode *root);
526          status_t loadAudioPolicyConfig(const char *path);
527          void defaultAudioPolicyConfig(void);
528  
529  
530          AudioPolicyClientInterface *mpClientInterface;  // audio policy client interface
531          audio_io_handle_t mPrimaryOutput;              // primary output handle
532          // list of descriptors for outputs currently opened
533          DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mOutputs;
534          // copy of mOutputs before setDeviceConnectionState() opens new outputs
535          // reset to mOutputs when updateDevicesAndOutputs() is called.
536          DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mPreviousOutputs;
537  
538          // list of input descriptors currently opened
539          DefaultKeyedVector<audio_io_handle_t, AudioInputDescriptor *> mInputs;
540  
541          audio_devices_t mAvailableOutputDevices; // bit field of all available output devices
542          audio_devices_t mAvailableInputDevices; // bit field of all available input devices
543                                                  // without AUDIO_DEVICE_BIT_IN to allow direct bit
544                                                  // field comparisons
545          int mPhoneState;                                                    // current phone state
546          AudioSystem::forced_config mForceUse[AudioSystem::NUM_FORCE_USE];   // current forced use configuration
547  
548          StreamDescriptor mStreams[AudioSystem::NUM_STREAM_TYPES];           // stream descriptors for volume control
549          String8 mA2dpDeviceAddress;                                         // A2DP device MAC address
550          String8 mScoDeviceAddress;                                          // SCO device MAC address
551          String8 mUsbOutCardAndDevice;                                       // USB audio ALSA card and device numbers:
552                                                                              // card=<card_number>;device=<><device_number>
553          bool    mLimitRingtoneVolume;                                       // limit ringtone volume to music volume if headset connected
554          audio_devices_t mDeviceForStrategy[NUM_STRATEGIES];
555          float   mLastVoiceVolume;                                           // last voice volume value sent to audio HAL
556  
557          // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units
558          static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000;
559          // Maximum memory allocated to audio effects in KB
560          static const uint32_t MAX_EFFECTS_MEMORY = 512;
561          uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects
562          uint32_t mTotalEffectsMemory;  // current memory used by effects
563          KeyedVector<int, EffectDescriptor *> mEffects;  // list of registered audio effects
564          bool    mA2dpSuspended;  // true if A2DP output is suspended
565          bool mHasA2dp; // true on platforms with support for bluetooth A2DP
566          bool mHasUsb; // true on platforms with support for USB audio
567          bool mHasRemoteSubmix; // true on platforms with support for remote presentation of a submix
568          audio_devices_t mAttachedOutputDevices; // output devices always available on the platform
569          audio_devices_t mDefaultOutputDevice; // output device selected by default at boot time
570                                                // (must be in mAttachedOutputDevices)
571          bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path
572                                  // to boost soft sounds, used to adjust volume curves accordingly
573  
574          Vector <HwModule *> mHwModules;
575  
576  #ifdef AUDIO_POLICY_TEST
577          Mutex   mLock;
578          Condition mWaitWorkCV;
579  
580          int             mCurOutput;
581          bool            mDirectOutput;
582          audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS];
583          int             mTestInput;
584          uint32_t        mTestDevice;
585          uint32_t        mTestSamplingRate;
586          uint32_t        mTestFormat;
587          uint32_t        mTestChannels;
588          uint32_t        mTestLatencyMs;
589  #endif //AUDIO_POLICY_TEST
590  
591  private:
592          static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
593                  int indexInUi);
594          // updates device caching and output for streams that can influence the
595          //    routing of notifications
596          void handleNotificationRoutingForStream(AudioSystem::stream_type stream);
597          static bool isVirtualInputDevice(audio_devices_t device);
598  };
599  
600  };
601