AudioFlinger.h revision 1c333e252cbca3337c1bedbc57a005f3b7d23fdb 
1/*
2**
3** Copyright 2007, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#ifndef ANDROID_AUDIO_FLINGER_H
19#define ANDROID_AUDIO_FLINGER_H
20
21#include "Configuration.h"
22#include <stdint.h>
23#include <sys/types.h>
24#include <limits.h>
25
26#include <common_time/cc_helper.h>
27
28#include <cutils/compiler.h>
29
30#include <media/IAudioFlinger.h>
31#include <media/IAudioFlingerClient.h>
32#include <media/IAudioTrack.h>
33#include <media/IAudioRecord.h>
34#include <media/AudioSystem.h>
35#include <media/AudioTrack.h>
36
37#include <utils/Atomic.h>
38#include <utils/Errors.h>
39#include <utils/threads.h>
40#include <utils/SortedVector.h>
41#include <utils/TypeHelpers.h>
42#include <utils/Vector.h>
43
44#include <binder/BinderService.h>
45#include <binder/MemoryDealer.h>
46
47#include <system/audio.h>
48#include <hardware/audio.h>
49#include <hardware/audio_policy.h>
50
51#include <media/AudioBufferProvider.h>
52#include <media/ExtendedAudioBufferProvider.h>
53#include "FastMixer.h"
54#include <media/nbaio/NBAIO.h>
55#include "AudioWatchdog.h"
56
57#include <powermanager/IPowerManager.h>
58
59#include <media/nbaio/NBLog.h>
60#include <private/media/AudioTrackShared.h>
61
62namespace android {
63
64struct audio_track_cblk_t;
65struct effect_param_cblk_t;
66class AudioMixer;
67class AudioBuffer;
68class AudioResampler;
69class FastMixer;
70class ServerProxy;
71
72// ----------------------------------------------------------------------------
73
74// AudioFlinger has a hard-coded upper limit of 2 channels for capture and playback.
75// There is support for > 2 channel tracks down-mixed to 2 channel output via a down-mix effect.
76// Adding full support for > 2 channel capture or playback would require more than simply changing
77// this #define.  There is an independent hard-coded upper limit in AudioMixer;
78// removing that AudioMixer limit would be necessary but insufficient to support > 2 channels.
79// The macro FCC_2 highlights some (but not all) places where there is are 2-channel assumptions.
80// Search also for "2", "left", "right", "[0]", "[1]", ">> 16", "<< 16", etc.
81#define FCC_2 2     // FCC_2 = Fixed Channel Count 2
82
83static const nsecs_t kDefaultStandbyTimeInNsecs = seconds(3);
84
85#define INCLUDING_FROM_AUDIOFLINGER_H
86
87class AudioFlinger :
88    public BinderService<AudioFlinger>,
89    public BnAudioFlinger
90{
91    friend class BinderService<AudioFlinger>;   // for AudioFlinger()
92public:
93    static const char* getServiceName() ANDROID_API { return "media.audio_flinger"; }
94
95    virtual     status_t    dump(int fd, const Vector<String16>& args);
96
97    // IAudioFlinger interface, in binder opcode order
98    virtual sp<IAudioTrack> createTrack(
99                                audio_stream_type_t streamType,
100                                uint32_t sampleRate,
101                                audio_format_t format,
102                                audio_channel_mask_t channelMask,
103                                size_t *pFrameCount,
104                                IAudioFlinger::track_flags_t *flags,
105                                const sp<IMemory>& sharedBuffer,
106                                audio_io_handle_t output,
107                                pid_t tid,
108                                int *sessionId,
109                                int clientUid,
110                                status_t *status /*non-NULL*/);
111
112    virtual sp<IAudioRecord> openRecord(
113                                audio_io_handle_t input,
114                                uint32_t sampleRate,
115                                audio_format_t format,
116                                audio_channel_mask_t channelMask,
117                                size_t *pFrameCount,
118                                IAudioFlinger::track_flags_t *flags,
119                                pid_t tid,
120                                int *sessionId,
121                                sp<IMemory>& cblk,
122                                sp<IMemory>& buffers,
123                                status_t *status /*non-NULL*/);
124
125    virtual     uint32_t    sampleRate(audio_io_handle_t output) const;
126    virtual     int         channelCount(audio_io_handle_t output) const;
127    virtual     audio_format_t format(audio_io_handle_t output) const;
128    virtual     size_t      frameCount(audio_io_handle_t output) const;
129    virtual     uint32_t    latency(audio_io_handle_t output) const;
130
131    virtual     status_t    setMasterVolume(float value);
132    virtual     status_t    setMasterMute(bool muted);
133
134    virtual     float       masterVolume() const;
135    virtual     bool        masterMute() const;
136
137    virtual     status_t    setStreamVolume(audio_stream_type_t stream, float value,
138                                            audio_io_handle_t output);
139    virtual     status_t    setStreamMute(audio_stream_type_t stream, bool muted);
140
141    virtual     float       streamVolume(audio_stream_type_t stream,
142                                         audio_io_handle_t output) const;
143    virtual     bool        streamMute(audio_stream_type_t stream) const;
144
145    virtual     status_t    setMode(audio_mode_t mode);
146
147    virtual     status_t    setMicMute(bool state);
148    virtual     bool        getMicMute() const;
149
150    virtual     status_t    setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs);
151    virtual     String8     getParameters(audio_io_handle_t ioHandle, const String8& keys) const;
152
153    virtual     void        registerClient(const sp<IAudioFlingerClient>& client);
154
155    virtual     size_t      getInputBufferSize(uint32_t sampleRate, audio_format_t format,
156                                               audio_channel_mask_t channelMask) const;
157
158    virtual audio_io_handle_t openOutput(audio_module_handle_t module,
159                                         audio_devices_t *pDevices,
160                                         uint32_t *pSamplingRate,
161                                         audio_format_t *pFormat,
162                                         audio_channel_mask_t *pChannelMask,
163                                         uint32_t *pLatencyMs,
164                                         audio_output_flags_t flags,
165                                         const audio_offload_info_t *offloadInfo);
166
167    virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1,
168                                                  audio_io_handle_t output2);
169
170    virtual status_t closeOutput(audio_io_handle_t output);
171
172    virtual status_t suspendOutput(audio_io_handle_t output);
173
174    virtual status_t restoreOutput(audio_io_handle_t output);
175
176    virtual audio_io_handle_t openInput(audio_module_handle_t module,
177                                        audio_devices_t *pDevices,
178                                        uint32_t *pSamplingRate,
179                                        audio_format_t *pFormat,
180                                        audio_channel_mask_t *pChannelMask);
181
182    virtual status_t closeInput(audio_io_handle_t input);
183
184    virtual status_t invalidateStream(audio_stream_type_t stream);
185
186    virtual status_t setVoiceVolume(float volume);
187
188    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames,
189                                       audio_io_handle_t output) const;
190
191    virtual uint32_t getInputFramesLost(audio_io_handle_t ioHandle) const;
192
193    virtual int newAudioSessionId();
194
195    virtual void acquireAudioSessionId(int audioSession, pid_t pid);
196
197    virtual void releaseAudioSessionId(int audioSession, pid_t pid);
198
199    virtual status_t queryNumberEffects(uint32_t *numEffects) const;
200
201    virtual status_t queryEffect(uint32_t index, effect_descriptor_t *descriptor) const;
202
203    virtual status_t getEffectDescriptor(const effect_uuid_t *pUuid,
204                                         effect_descriptor_t *descriptor) const;
205
206    virtual sp<IEffect> createEffect(
207                        effect_descriptor_t *pDesc,
208                        const sp<IEffectClient>& effectClient,
209                        int32_t priority,
210                        audio_io_handle_t io,
211                        int sessionId,
212                        status_t *status /*non-NULL*/,
213                        int *id,
214                        int *enabled);
215
216    virtual status_t moveEffects(int sessionId, audio_io_handle_t srcOutput,
217                        audio_io_handle_t dstOutput);
218
219    virtual audio_module_handle_t loadHwModule(const char *name);
220
221    virtual uint32_t getPrimaryOutputSamplingRate();
222    virtual size_t getPrimaryOutputFrameCount();
223
224    virtual status_t setLowRamDevice(bool isLowRamDevice);
225
226    /* List available audio ports and their attributes */
227    virtual status_t listAudioPorts(unsigned int *num_ports,
228                                    struct audio_port *ports);
229
230    /* Get attributes for a given audio port */
231    virtual status_t getAudioPort(struct audio_port *port);
232
233    /* Create an audio patch between several source and sink ports */
234    virtual status_t createAudioPatch(const struct audio_patch *patch,
235                                       audio_patch_handle_t *handle);
236
237    /* Release an audio patch */
238    virtual status_t releaseAudioPatch(audio_patch_handle_t handle);
239
240    /* List existing audio patches */
241    virtual status_t listAudioPatches(unsigned int *num_patches,
242                                      struct audio_patch *patches);
243
244    /* Set audio port configuration */
245    virtual status_t setAudioPortConfig(const struct audio_port_config *config);
246
247    virtual     status_t    onTransact(
248                                uint32_t code,
249                                const Parcel& data,
250                                Parcel* reply,
251                                uint32_t flags);
252
253    // end of IAudioFlinger interface
254
255    sp<NBLog::Writer>   newWriter_l(size_t size, const char *name);
256    void                unregisterWriter(const sp<NBLog::Writer>& writer);
257private:
258    static const size_t kLogMemorySize = 40 * 1024;
259    sp<MemoryDealer>    mLogMemoryDealer;   // == 0 when NBLog is disabled
260    // When a log writer is unregistered, it is done lazily so that media.log can continue to see it
261    // for as long as possible.  The memory is only freed when it is needed for another log writer.
262    Vector< sp<NBLog::Writer> > mUnregisteredWriters;
263    Mutex               mUnregisteredWritersLock;
264public:
265
266    class SyncEvent;
267
268    typedef void (*sync_event_callback_t)(const wp<SyncEvent>& event) ;
269
270    class SyncEvent : public RefBase {
271    public:
272        SyncEvent(AudioSystem::sync_event_t type,
273                  int triggerSession,
274                  int listenerSession,
275                  sync_event_callback_t callBack,
276                  wp<RefBase> cookie)
277        : mType(type), mTriggerSession(triggerSession), mListenerSession(listenerSession),
278          mCallback(callBack), mCookie(cookie)
279        {}
280
281        virtual ~SyncEvent() {}
282
283        void trigger() { Mutex::Autolock _l(mLock); if (mCallback) mCallback(this); }
284        bool isCancelled() const { Mutex::Autolock _l(mLock); return (mCallback == NULL); }
285        void cancel() { Mutex::Autolock _l(mLock); mCallback = NULL; }
286        AudioSystem::sync_event_t type() const { return mType; }
287        int triggerSession() const { return mTriggerSession; }
288        int listenerSession() const { return mListenerSession; }
289        wp<RefBase> cookie() const { return mCookie; }
290
291    private:
292          const AudioSystem::sync_event_t mType;
293          const int mTriggerSession;
294          const int mListenerSession;
295          sync_event_callback_t mCallback;
296          const wp<RefBase> mCookie;
297          mutable Mutex mLock;
298    };
299
300    sp<SyncEvent> createSyncEvent(AudioSystem::sync_event_t type,
301                                        int triggerSession,
302                                        int listenerSession,
303                                        sync_event_callback_t callBack,
304                                        wp<RefBase> cookie);
305
306private:
307    class AudioHwDevice;    // fwd declaration for findSuitableHwDev_l
308
309               audio_mode_t getMode() const { return mMode; }
310
311                bool        btNrecIsOff() const { return mBtNrecIsOff; }
312
313                            AudioFlinger() ANDROID_API;
314    virtual                 ~AudioFlinger();
315
316    // call in any IAudioFlinger method that accesses mPrimaryHardwareDev
317    status_t                initCheck() const { return mPrimaryHardwareDev == NULL ?
318                                                        NO_INIT : NO_ERROR; }
319
320    // RefBase
321    virtual     void        onFirstRef();
322
323    AudioHwDevice*          findSuitableHwDev_l(audio_module_handle_t module,
324                                                audio_devices_t devices);
325    void                    purgeStaleEffects_l();
326
327    // standby delay for MIXER and DUPLICATING playback threads is read from property
328    // ro.audio.flinger_standbytime_ms or defaults to kDefaultStandbyTimeInNsecs
329    static nsecs_t          mStandbyTimeInNsecs;
330
331    // incremented by 2 when screen state changes, bit 0 == 1 means "off"
332    // AudioFlinger::setParameters() updates, other threads read w/o lock
333    static uint32_t         mScreenState;
334
335    // Internal dump utilities.
336    static const int kDumpLockRetries = 50;
337    static const int kDumpLockSleepUs = 20000;
338    static bool dumpTryLock(Mutex& mutex);
339    void dumpPermissionDenial(int fd, const Vector<String16>& args);
340    void dumpClients(int fd, const Vector<String16>& args);
341    void dumpInternals(int fd, const Vector<String16>& args);
342
343    // --- Client ---
344    class Client : public RefBase {
345    public:
346                            Client(const sp<AudioFlinger>& audioFlinger, pid_t pid);
347        virtual             ~Client();
348        sp<MemoryDealer>    heap() const;
349        pid_t               pid() const { return mPid; }
350        sp<AudioFlinger>    audioFlinger() const { return mAudioFlinger; }
351
352        bool reserveTimedTrack();
353        void releaseTimedTrack();
354
355    private:
356                            Client(const Client&);
357                            Client& operator = (const Client&);
358        const sp<AudioFlinger> mAudioFlinger;
359        const sp<MemoryDealer> mMemoryDealer;
360        const pid_t         mPid;
361
362        Mutex               mTimedTrackLock;
363        int                 mTimedTrackCount;
364    };
365
366    // --- Notification Client ---
367    class NotificationClient : public IBinder::DeathRecipient {
368    public:
369                            NotificationClient(const sp<AudioFlinger>& audioFlinger,
370                                                const sp<IAudioFlingerClient>& client,
371                                                pid_t pid);
372        virtual             ~NotificationClient();
373
374                sp<IAudioFlingerClient> audioFlingerClient() const { return mAudioFlingerClient; }
375
376                // IBinder::DeathRecipient
377                virtual     void        binderDied(const wp<IBinder>& who);
378
379    private:
380                            NotificationClient(const NotificationClient&);
381                            NotificationClient& operator = (const NotificationClient&);
382
383        const sp<AudioFlinger>  mAudioFlinger;
384        const pid_t             mPid;
385        const sp<IAudioFlingerClient> mAudioFlingerClient;
386    };
387
388    class TrackHandle;
389    class RecordHandle;
390    class RecordThread;
391    class PlaybackThread;
392    class MixerThread;
393    class DirectOutputThread;
394    class OffloadThread;
395    class DuplicatingThread;
396    class AsyncCallbackThread;
397    class Track;
398    class RecordTrack;
399    class EffectModule;
400    class EffectHandle;
401    class EffectChain;
402    struct AudioStreamOut;
403    struct AudioStreamIn;
404
405    struct  stream_type_t {
406        stream_type_t()
407            :   volume(1.0f),
408                mute(false)
409        {
410        }
411        float       volume;
412        bool        mute;
413    };
414
415    // --- PlaybackThread ---
416
417#include "Threads.h"
418
419#include "Effects.h"
420
421#include "PatchPanel.h"
422
423    // server side of the client's IAudioTrack
424    class TrackHandle : public android::BnAudioTrack {
425    public:
426                            TrackHandle(const sp<PlaybackThread::Track>& track);
427        virtual             ~TrackHandle();
428        virtual sp<IMemory> getCblk() const;
429        virtual status_t    start();
430        virtual void        stop();
431        virtual void        flush();
432        virtual void        pause();
433        virtual status_t    attachAuxEffect(int effectId);
434        virtual status_t    allocateTimedBuffer(size_t size,
435                                                sp<IMemory>* buffer);
436        virtual status_t    queueTimedBuffer(const sp<IMemory>& buffer,
437                                             int64_t pts);
438        virtual status_t    setMediaTimeTransform(const LinearTransform& xform,
439                                                  int target);
440        virtual status_t    setParameters(const String8& keyValuePairs);
441        virtual status_t    getTimestamp(AudioTimestamp& timestamp);
442        virtual void        signal(); // signal playback thread for a change in control block
443
444        virtual status_t onTransact(
445            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
446
447    private:
448        const sp<PlaybackThread::Track> mTrack;
449    };
450
451    // server side of the client's IAudioRecord
452    class RecordHandle : public android::BnAudioRecord {
453    public:
454        RecordHandle(const sp<RecordThread::RecordTrack>& recordTrack);
455        virtual             ~RecordHandle();
456        virtual status_t    start(int /*AudioSystem::sync_event_t*/ event, int triggerSession);
457        virtual void        stop();
458        virtual status_t onTransact(
459            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
460    private:
461        const sp<RecordThread::RecordTrack> mRecordTrack;
462
463        // for use from destructor
464        void                stop_nonvirtual();
465    };
466
467
468              PlaybackThread *checkPlaybackThread_l(audio_io_handle_t output) const;
469              MixerThread *checkMixerThread_l(audio_io_handle_t output) const;
470              RecordThread *checkRecordThread_l(audio_io_handle_t input) const;
471              // no range check, AudioFlinger::mLock held
472              bool streamMute_l(audio_stream_type_t stream) const
473                                { return mStreamTypes[stream].mute; }
474              // no range check, doesn't check per-thread stream volume, AudioFlinger::mLock held
475              float streamVolume_l(audio_stream_type_t stream) const
476                                { return mStreamTypes[stream].volume; }
477              void audioConfigChanged(int event, audio_io_handle_t ioHandle, const void *param2);
478
479              // Allocate an audio_io_handle_t, session ID, effect ID, or audio_module_handle_t.
480              // They all share the same ID space, but the namespaces are actually independent
481              // because there are separate KeyedVectors for each kind of ID.
482              // The return value is uint32_t, but is cast to signed for some IDs.
483              // FIXME This API does not handle rollover to zero (for unsigned IDs),
484              //       or from positive to negative (for signed IDs).
485              //       Thus it may fail by returning an ID of the wrong sign,
486              //       or by returning a non-unique ID.
487              uint32_t nextUniqueId();
488
489              status_t moveEffectChain_l(int sessionId,
490                                     PlaybackThread *srcThread,
491                                     PlaybackThread *dstThread,
492                                     bool reRegister);
493              // return thread associated with primary hardware device, or NULL
494              PlaybackThread *primaryPlaybackThread_l() const;
495              audio_devices_t primaryOutputDevice_l() const;
496
497              sp<PlaybackThread> getEffectThread_l(int sessionId, int EffectId);
498
499
500                void        removeClient_l(pid_t pid);
501                void        removeNotificationClient(pid_t pid);
502                bool isNonOffloadableGlobalEffectEnabled_l();
503                void onNonOffloadableGlobalEffectEnable();
504
505    class AudioHwDevice {
506    public:
507        enum Flags {
508            AHWD_CAN_SET_MASTER_VOLUME  = 0x1,
509            AHWD_CAN_SET_MASTER_MUTE    = 0x2,
510        };
511
512        AudioHwDevice(const char *moduleName,
513                      audio_hw_device_t *hwDevice,
514                      Flags flags)
515            : mModuleName(strdup(moduleName))
516            , mHwDevice(hwDevice)
517            , mFlags(flags) { }
518        /*virtual*/ ~AudioHwDevice() { free((void *)mModuleName); }
519
520        bool canSetMasterVolume() const {
521            return (0 != (mFlags & AHWD_CAN_SET_MASTER_VOLUME));
522        }
523
524        bool canSetMasterMute() const {
525            return (0 != (mFlags & AHWD_CAN_SET_MASTER_MUTE));
526        }
527
528        const char *moduleName() const { return mModuleName; }
529        audio_hw_device_t *hwDevice() const { return mHwDevice; }
530        uint32_t version() const { return mHwDevice->common.version; }
531
532    private:
533        const char * const mModuleName;
534        audio_hw_device_t * const mHwDevice;
535        const Flags mFlags;
536    };
537
538    // AudioStreamOut and AudioStreamIn are immutable, so their fields are const.
539    // For emphasis, we could also make all pointers to them be "const *",
540    // but that would clutter the code unnecessarily.
541
542    struct AudioStreamOut {
543        AudioHwDevice* const audioHwDev;
544        audio_stream_out_t* const stream;
545        const audio_output_flags_t flags;
546
547        audio_hw_device_t* hwDev() const { return audioHwDev->hwDevice(); }
548
549        AudioStreamOut(AudioHwDevice *dev, audio_stream_out_t *out, audio_output_flags_t flags) :
550            audioHwDev(dev), stream(out), flags(flags) {}
551    };
552
553    struct AudioStreamIn {
554        AudioHwDevice* const audioHwDev;
555        audio_stream_in_t* const stream;
556
557        audio_hw_device_t* hwDev() const { return audioHwDev->hwDevice(); }
558
559        AudioStreamIn(AudioHwDevice *dev, audio_stream_in_t *in) :
560            audioHwDev(dev), stream(in) {}
561    };
562
563    // for mAudioSessionRefs only
564    struct AudioSessionRef {
565        AudioSessionRef(int sessionid, pid_t pid) :
566            mSessionid(sessionid), mPid(pid), mCnt(1) {}
567        const int   mSessionid;
568        const pid_t mPid;
569        int         mCnt;
570    };
571
572    mutable     Mutex                               mLock;
573                // protects mClients and mNotificationClients.
574                // must be locked after mLock and ThreadBase::mLock if both must be locked
575                // avoids acquiring AudioFlinger::mLock from inside thread loop.
576    mutable     Mutex                               mClientLock;
577                // protected by mClientLock
578                DefaultKeyedVector< pid_t, wp<Client> >     mClients;   // see ~Client()
579
580                mutable     Mutex                   mHardwareLock;
581                // NOTE: If both mLock and mHardwareLock mutexes must be held,
582                // always take mLock before mHardwareLock
583
584                // These two fields are immutable after onFirstRef(), so no lock needed to access
585                AudioHwDevice*                      mPrimaryHardwareDev; // mAudioHwDevs[0] or NULL
586                DefaultKeyedVector<audio_module_handle_t, AudioHwDevice*>  mAudioHwDevs;
587
588    // for dump, indicates which hardware operation is currently in progress (but not stream ops)
589    enum hardware_call_state {
590        AUDIO_HW_IDLE = 0,              // no operation in progress
591        AUDIO_HW_INIT,                  // init_check
592        AUDIO_HW_OUTPUT_OPEN,           // open_output_stream
593        AUDIO_HW_OUTPUT_CLOSE,          // unused
594        AUDIO_HW_INPUT_OPEN,            // unused
595        AUDIO_HW_INPUT_CLOSE,           // unused
596        AUDIO_HW_STANDBY,               // unused
597        AUDIO_HW_SET_MASTER_VOLUME,     // set_master_volume
598        AUDIO_HW_GET_ROUTING,           // unused
599        AUDIO_HW_SET_ROUTING,           // unused
600        AUDIO_HW_GET_MODE,              // unused
601        AUDIO_HW_SET_MODE,              // set_mode
602        AUDIO_HW_GET_MIC_MUTE,          // get_mic_mute
603        AUDIO_HW_SET_MIC_MUTE,          // set_mic_mute
604        AUDIO_HW_SET_VOICE_VOLUME,      // set_voice_volume
605        AUDIO_HW_SET_PARAMETER,         // set_parameters
606        AUDIO_HW_GET_INPUT_BUFFER_SIZE, // get_input_buffer_size
607        AUDIO_HW_GET_MASTER_VOLUME,     // get_master_volume
608        AUDIO_HW_GET_PARAMETER,         // get_parameters
609        AUDIO_HW_SET_MASTER_MUTE,       // set_master_mute
610        AUDIO_HW_GET_MASTER_MUTE,       // get_master_mute
611    };
612
613    mutable     hardware_call_state                 mHardwareStatus;    // for dump only
614
615
616                DefaultKeyedVector< audio_io_handle_t, sp<PlaybackThread> >  mPlaybackThreads;
617                stream_type_t                       mStreamTypes[AUDIO_STREAM_CNT];
618
619                // member variables below are protected by mLock
620                float                               mMasterVolume;
621                bool                                mMasterMute;
622                // end of variables protected by mLock
623
624                DefaultKeyedVector< audio_io_handle_t, sp<RecordThread> >    mRecordThreads;
625
626                // protected by mClientLock
627                DefaultKeyedVector< pid_t, sp<NotificationClient> >    mNotificationClients;
628
629                volatile int32_t                    mNextUniqueId;  // updated by android_atomic_inc
630                // nextUniqueId() returns uint32_t, but this is declared int32_t
631                // because the atomic operations require an int32_t
632
633                audio_mode_t                        mMode;
634                bool                                mBtNrecIsOff;
635
636                // protected by mLock
637                Vector<AudioSessionRef*> mAudioSessionRefs;
638
639                float       masterVolume_l() const;
640                bool        masterMute_l() const;
641                audio_module_handle_t loadHwModule_l(const char *name);
642
643                Vector < sp<SyncEvent> > mPendingSyncEvents; // sync events awaiting for a session
644                                                             // to be created
645
646private:
647    sp<Client>  registerPid(pid_t pid);    // always returns non-0
648
649    // for use from destructor
650    status_t    closeOutput_nonvirtual(audio_io_handle_t output);
651    status_t    closeInput_nonvirtual(audio_io_handle_t input);
652
653#ifdef TEE_SINK
654    // all record threads serially share a common tee sink, which is re-created on format change
655    sp<NBAIO_Sink>   mRecordTeeSink;
656    sp<NBAIO_Source> mRecordTeeSource;
657#endif
658
659public:
660
661#ifdef TEE_SINK
662    // tee sink, if enabled by property, allows dumpsys to write most recent audio to .wav file
663    static void dumpTee(int fd, const sp<NBAIO_Source>& source, audio_io_handle_t id = 0);
664
665    // whether tee sink is enabled by property
666    static bool mTeeSinkInputEnabled;
667    static bool mTeeSinkOutputEnabled;
668    static bool mTeeSinkTrackEnabled;
669
670    // runtime configured size of each tee sink pipe, in frames
671    static size_t mTeeSinkInputFrames;
672    static size_t mTeeSinkOutputFrames;
673    static size_t mTeeSinkTrackFrames;
674
675    // compile-time default size of tee sink pipes, in frames
676    // 0x200000 stereo 16-bit PCM frames = 47.5 seconds at 44.1 kHz, 8 megabytes
677    static const size_t kTeeSinkInputFramesDefault = 0x200000;
678    static const size_t kTeeSinkOutputFramesDefault = 0x200000;
679    static const size_t kTeeSinkTrackFramesDefault = 0x200000;
680#endif
681
682    // This method reads from a variable without mLock, but the variable is updated under mLock.  So
683    // we might read a stale value, or a value that's inconsistent with respect to other variables.
684    // In this case, it's safe because the return value isn't used for making an important decision.
685    // The reason we don't want to take mLock is because it could block the caller for a long time.
686    bool    isLowRamDevice() const { return mIsLowRamDevice; }
687
688private:
689    bool    mIsLowRamDevice;
690    bool    mIsDeviceTypeKnown;
691    nsecs_t mGlobalEffectEnableTime;  // when a global effect was last enabled
692
693    sp<PatchPanel> mPatchPanel;
694};
695
696#undef INCLUDING_FROM_AUDIOFLINGER_H
697
698const char *formatToString(audio_format_t format);
699
700// ----------------------------------------------------------------------------
701
702}; // namespace android
703
704#endif // ANDROID_AUDIO_FLINGER_H
705