AudioFlinger.h revision 59bd0da8373af0e5159b799495fda51e03120ea4 
1/* //device/include/server/AudioFlinger/AudioFlinger.h
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 <stdint.h>
22#include <sys/types.h>
23#include <limits.h>
24
25#include <media/IAudioFlinger.h>
26#include <media/IAudioFlingerClient.h>
27#include <media/IAudioTrack.h>
28#include <media/IAudioRecord.h>
29#include <media/AudioTrack.h>
30
31#include <utils/Atomic.h>
32#include <utils/Errors.h>
33#include <utils/threads.h>
34#include <utils/SortedVector.h>
35#include <utils/TypeHelpers.h>
36#include <utils/Vector.h>
37
38#include <binder/BinderService.h>
39#include <binder/MemoryDealer.h>
40
41#include <system/audio.h>
42#include <hardware/audio.h>
43
44#include "AudioBufferProvider.h"
45
46#include <powermanager/IPowerManager.h>
47
48namespace android {
49
50class audio_track_cblk_t;
51class effect_param_cblk_t;
52class AudioMixer;
53class AudioBuffer;
54class AudioResampler;
55
56// ----------------------------------------------------------------------------
57
58#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
59#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
60
61
62// ----------------------------------------------------------------------------
63
64static const nsecs_t kStandbyTimeInNsecs = seconds(3);
65
66class AudioFlinger :
67    public BinderService<AudioFlinger>,
68    public BnAudioFlinger
69{
70    friend class BinderService<AudioFlinger>;
71public:
72    static char const* getServiceName() { return "media.audio_flinger"; }
73
74    virtual     status_t    dump(int fd, const Vector<String16>& args);
75
76    // IAudioFlinger interface
77    virtual sp<IAudioTrack> createTrack(
78                                pid_t pid,
79                                int streamType,
80                                uint32_t sampleRate,
81                                uint32_t format,
82                                uint32_t channelMask,
83                                int frameCount,
84                                uint32_t flags,
85                                const sp<IMemory>& sharedBuffer,
86                                int output,
87                                int *sessionId,
88                                status_t *status);
89
90    virtual     uint32_t    sampleRate(int output) const;
91    virtual     int         channelCount(int output) const;
92    virtual     uint32_t    format(int output) const;
93    virtual     size_t      frameCount(int output) const;
94    virtual     uint32_t    latency(int output) const;
95
96    virtual     status_t    setMasterVolume(float value);
97    virtual     status_t    setMasterMute(bool muted);
98
99    virtual     float       masterVolume() const;
100    virtual     bool        masterMute() const;
101
102    virtual     status_t    setStreamVolume(int stream, float value, int output);
103    virtual     status_t    setStreamMute(int stream, bool muted);
104
105    virtual     float       streamVolume(int stream, int output) const;
106    virtual     bool        streamMute(int stream) const;
107
108    virtual     status_t    setMode(int mode);
109
110    virtual     status_t    setMicMute(bool state);
111    virtual     bool        getMicMute() const;
112
113    virtual     status_t    setParameters(int ioHandle, const String8& keyValuePairs);
114    virtual     String8     getParameters(int ioHandle, const String8& keys);
115
116    virtual     void        registerClient(const sp<IAudioFlingerClient>& client);
117
118    virtual     size_t      getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
119    virtual     unsigned int  getInputFramesLost(int ioHandle);
120
121    virtual int openOutput(uint32_t *pDevices,
122                                    uint32_t *pSamplingRate,
123                                    uint32_t *pFormat,
124                                    uint32_t *pChannels,
125                                    uint32_t *pLatencyMs,
126                                    uint32_t flags);
127
128    virtual int openDuplicateOutput(int output1, int output2);
129
130    virtual status_t closeOutput(int output);
131
132    virtual status_t suspendOutput(int output);
133
134    virtual status_t restoreOutput(int output);
135
136    virtual int openInput(uint32_t *pDevices,
137                            uint32_t *pSamplingRate,
138                            uint32_t *pFormat,
139                            uint32_t *pChannels,
140                            uint32_t acoustics);
141
142    virtual status_t closeInput(int input);
143
144    virtual status_t setStreamOutput(uint32_t stream, int output);
145
146    virtual status_t setVoiceVolume(float volume);
147
148    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output);
149
150    virtual int newAudioSessionId();
151
152    virtual status_t queryNumberEffects(uint32_t *numEffects);
153
154    virtual status_t queryEffect(uint32_t index, effect_descriptor_t *descriptor);
155
156    virtual status_t getEffectDescriptor(effect_uuid_t *pUuid, effect_descriptor_t *descriptor);
157
158    virtual sp<IEffect> createEffect(pid_t pid,
159                        effect_descriptor_t *pDesc,
160                        const sp<IEffectClient>& effectClient,
161                        int32_t priority,
162                        int io,
163                        int sessionId,
164                        status_t *status,
165                        int *id,
166                        int *enabled);
167
168    virtual status_t moveEffects(int sessionId, int srcOutput, int dstOutput);
169
170    enum hardware_call_state {
171        AUDIO_HW_IDLE = 0,
172        AUDIO_HW_INIT,
173        AUDIO_HW_OUTPUT_OPEN,
174        AUDIO_HW_OUTPUT_CLOSE,
175        AUDIO_HW_INPUT_OPEN,
176        AUDIO_HW_INPUT_CLOSE,
177        AUDIO_HW_STANDBY,
178        AUDIO_HW_SET_MASTER_VOLUME,
179        AUDIO_HW_GET_ROUTING,
180        AUDIO_HW_SET_ROUTING,
181        AUDIO_HW_GET_MODE,
182        AUDIO_HW_SET_MODE,
183        AUDIO_HW_GET_MIC_MUTE,
184        AUDIO_HW_SET_MIC_MUTE,
185        AUDIO_SET_VOICE_VOLUME,
186        AUDIO_SET_PARAMETER,
187    };
188
189    // record interface
190    virtual sp<IAudioRecord> openRecord(
191                                pid_t pid,
192                                int input,
193                                uint32_t sampleRate,
194                                uint32_t format,
195                                uint32_t channelMask,
196                                int frameCount,
197                                uint32_t flags,
198                                int *sessionId,
199                                status_t *status);
200
201    virtual     status_t    onTransact(
202                                uint32_t code,
203                                const Parcel& data,
204                                Parcel* reply,
205                                uint32_t flags);
206
207                uint32_t    getMode() { return mMode; }
208
209                bool        btNrec() { return mBtNrec; }
210
211private:
212                            AudioFlinger();
213    virtual                 ~AudioFlinger();
214
215    status_t                initCheck() const;
216    virtual     void        onFirstRef();
217    audio_hw_device_t*      findSuitableHwDev_l(uint32_t devices);
218
219    // Internal dump utilites.
220    status_t dumpPermissionDenial(int fd, const Vector<String16>& args);
221    status_t dumpClients(int fd, const Vector<String16>& args);
222    status_t dumpInternals(int fd, const Vector<String16>& args);
223
224    // --- Client ---
225    class Client : public RefBase {
226    public:
227                            Client(const sp<AudioFlinger>& audioFlinger, pid_t pid);
228        virtual             ~Client();
229        const sp<MemoryDealer>&     heap() const;
230        pid_t               pid() const { return mPid; }
231        sp<AudioFlinger>    audioFlinger() { return mAudioFlinger; }
232
233    private:
234                            Client(const Client&);
235                            Client& operator = (const Client&);
236        sp<AudioFlinger>    mAudioFlinger;
237        sp<MemoryDealer>    mMemoryDealer;
238        pid_t               mPid;
239    };
240
241    // --- Notification Client ---
242    class NotificationClient : public IBinder::DeathRecipient {
243    public:
244                            NotificationClient(const sp<AudioFlinger>& audioFlinger,
245                                                const sp<IAudioFlingerClient>& client,
246                                                pid_t pid);
247        virtual             ~NotificationClient();
248
249                sp<IAudioFlingerClient>    client() { return mClient; }
250
251                // IBinder::DeathRecipient
252                virtual     void        binderDied(const wp<IBinder>& who);
253
254    private:
255                            NotificationClient(const NotificationClient&);
256                            NotificationClient& operator = (const NotificationClient&);
257
258        sp<AudioFlinger>        mAudioFlinger;
259        pid_t                   mPid;
260        sp<IAudioFlingerClient> mClient;
261    };
262
263    class TrackHandle;
264    class RecordHandle;
265    class RecordThread;
266    class PlaybackThread;
267    class MixerThread;
268    class DirectOutputThread;
269    class DuplicatingThread;
270    class Track;
271    class RecordTrack;
272    class EffectModule;
273    class EffectHandle;
274    class EffectChain;
275    struct AudioStreamOut;
276    struct AudioStreamIn;
277
278    class ThreadBase : public Thread {
279    public:
280        ThreadBase (const sp<AudioFlinger>& audioFlinger, int id, uint32_t device);
281        virtual             ~ThreadBase();
282
283
284        enum type {
285            MIXER,              // Thread class is MixerThread
286            DIRECT,             // Thread class is DirectOutputThread
287            DUPLICATING,        // Thread class is DuplicatingThread
288            RECORD              // Thread class is RecordThread
289        };
290
291        status_t dumpBase(int fd, const Vector<String16>& args);
292        status_t dumpEffectChains(int fd, const Vector<String16>& args);
293
294        void clearPowerManager();
295
296        // base for record and playback
297        class TrackBase : public AudioBufferProvider, public RefBase {
298
299        public:
300            enum track_state {
301                IDLE,
302                TERMINATED,
303                STOPPED,
304                RESUMING,
305                ACTIVE,
306                PAUSING,
307                PAUSED
308            };
309
310            enum track_flags {
311                STEPSERVER_FAILED = 0x01, //  StepServer could not acquire cblk->lock mutex
312                SYSTEM_FLAGS_MASK = 0x0000ffffUL,
313                // The upper 16 bits are used for track-specific flags.
314            };
315
316                                TrackBase(const wp<ThreadBase>& thread,
317                                        const sp<Client>& client,
318                                        uint32_t sampleRate,
319                                        uint32_t format,
320                                        uint32_t channelMask,
321                                        int frameCount,
322                                        uint32_t flags,
323                                        const sp<IMemory>& sharedBuffer,
324                                        int sessionId);
325                                ~TrackBase();
326
327            virtual status_t    start() = 0;
328            virtual void        stop() = 0;
329                    sp<IMemory> getCblk() const;
330                    audio_track_cblk_t* cblk() const { return mCblk; }
331                    int         sessionId() { return mSessionId; }
332
333        protected:
334            friend class ThreadBase;
335            friend class RecordHandle;
336            friend class PlaybackThread;
337            friend class RecordThread;
338            friend class MixerThread;
339            friend class DirectOutputThread;
340
341                                TrackBase(const TrackBase&);
342                                TrackBase& operator = (const TrackBase&);
343
344            virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer) = 0;
345            virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer);
346
347            uint32_t format() const {
348                return mFormat;
349            }
350
351            int channelCount() const ;
352
353            uint32_t channelMask() const;
354
355            int sampleRate() const;
356
357            void* getBuffer(uint32_t offset, uint32_t frames) const;
358
359            bool isStopped() const {
360                return mState == STOPPED;
361            }
362
363            bool isTerminated() const {
364                return mState == TERMINATED;
365            }
366
367            bool step();
368            void reset();
369
370            wp<ThreadBase>      mThread;
371            sp<Client>          mClient;
372            sp<IMemory>         mCblkMemory;
373            audio_track_cblk_t* mCblk;
374            void*               mBuffer;
375            void*               mBufferEnd;
376            uint32_t            mFrameCount;
377            // we don't really need a lock for these
378            int                 mState;
379            int                 mClientTid;
380            uint32_t            mFormat;
381            uint32_t            mFlags;
382            int                 mSessionId;
383            uint8_t             mChannelCount;
384            uint32_t            mChannelMask;
385        };
386
387        class ConfigEvent {
388        public:
389            ConfigEvent() : mEvent(0), mParam(0) {}
390
391            int mEvent;
392            int mParam;
393        };
394
395        class PMDeathRecipient : public IBinder::DeathRecipient {
396        public:
397                        PMDeathRecipient(const wp<ThreadBase>& thread) : mThread(thread) {}
398            virtual     ~PMDeathRecipient() {}
399
400            // IBinder::DeathRecipient
401            virtual     void        binderDied(const wp<IBinder>& who);
402
403        private:
404                        PMDeathRecipient(const PMDeathRecipient&);
405                        PMDeathRecipient& operator = (const PMDeathRecipient&);
406
407            wp<ThreadBase> mThread;
408        };
409
410        virtual     status_t    initCheck() const = 0;
411                    int         type() const { return mType; }
412                    uint32_t    sampleRate() const;
413                    int         channelCount() const;
414                    uint32_t    format() const;
415                    size_t      frameCount() const;
416                    void        wakeUp()    { mWaitWorkCV.broadcast(); }
417                    void        exit();
418        virtual     bool        checkForNewParameters_l() = 0;
419        virtual     status_t    setParameters(const String8& keyValuePairs);
420        virtual     String8     getParameters(const String8& keys) = 0;
421        virtual     void        audioConfigChanged_l(int event, int param = 0) = 0;
422                    void        sendConfigEvent(int event, int param = 0);
423                    void        sendConfigEvent_l(int event, int param = 0);
424                    void        processConfigEvents();
425                    int         id() const { return mId;}
426                    bool        standby() { return mStandby; }
427                    uint32_t    device() { return mDevice; }
428        virtual     audio_stream_t* stream() = 0;
429
430                    sp<EffectHandle> createEffect_l(
431                                        const sp<AudioFlinger::Client>& client,
432                                        const sp<IEffectClient>& effectClient,
433                                        int32_t priority,
434                                        int sessionId,
435                                        effect_descriptor_t *desc,
436                                        int *enabled,
437                                        status_t *status);
438                    void disconnectEffect(const sp< EffectModule>& effect,
439                                          const wp<EffectHandle>& handle);
440
441                    // return values for hasAudioSession (bit field)
442                    enum effect_state {
443                        EFFECT_SESSION = 0x1,   // the audio session corresponds to at least one
444                                                // effect
445                        TRACK_SESSION = 0x2     // the audio session corresponds to at least one
446                                                // track
447                    };
448
449                    // get effect chain corresponding to session Id.
450                    sp<EffectChain> getEffectChain(int sessionId);
451                    // same as getEffectChain() but must be called with ThreadBase mutex locked
452                    sp<EffectChain> getEffectChain_l(int sessionId);
453                    // add an effect chain to the chain list (mEffectChains)
454        virtual     status_t addEffectChain_l(const sp<EffectChain>& chain) = 0;
455                    // remove an effect chain from the chain list (mEffectChains)
456        virtual     size_t removeEffectChain_l(const sp<EffectChain>& chain) = 0;
457                    // lock mall effect chains Mutexes. Must be called before releasing the
458                    // ThreadBase mutex before processing the mixer and effects. This guarantees the
459                    // integrity of the chains during the process.
460                    void lockEffectChains_l(Vector<sp <EffectChain> >& effectChains);
461                    // unlock effect chains after process
462                    void unlockEffectChains(Vector<sp <EffectChain> >& effectChains);
463                    // set audio mode to all effect chains
464                    void setMode(uint32_t mode);
465                    // get effect module with corresponding ID on specified audio session
466                    sp<AudioFlinger::EffectModule> getEffect_l(int sessionId, int effectId);
467                    // add and effect module. Also creates the effect chain is none exists for
468                    // the effects audio session
469                    status_t addEffect_l(const sp< EffectModule>& effect);
470                    // remove and effect module. Also removes the effect chain is this was the last
471                    // effect
472                    void removeEffect_l(const sp< EffectModule>& effect);
473                    // detach all tracks connected to an auxiliary effect
474        virtual     void detachAuxEffect_l(int effectId) {}
475                    // returns either EFFECT_SESSION if effects on this audio session exist in one
476                    // chain, or TRACK_SESSION if tracks on this audio session exist, or both
477                    virtual uint32_t hasAudioSession(int sessionId) = 0;
478                    // the value returned by default implementation is not important as the
479                    // strategy is only meaningful for PlaybackThread which implements this method
480                    virtual uint32_t getStrategyForSession_l(int sessionId) { return 0; }
481
482                    // suspend or restore effect according to the type of effect passed. a NULL
483                    // type pointer means suspend all effects in the session
484                    void setEffectSuspended(const effect_uuid_t *type,
485                                            bool suspend,
486                                            int sessionId = AUDIO_SESSION_OUTPUT_MIX);
487                    // check if some effects must be suspended/restored when an effect is enabled
488                    // or disabled
489        virtual     void checkSuspendOnEffectEnabled(const sp<EffectModule>& effect,
490                                                     bool enabled,
491                                                     int sessionId = AUDIO_SESSION_OUTPUT_MIX);
492
493        mutable     Mutex                   mLock;
494
495    protected:
496
497                    // entry describing an effect being suspended in mSuspendedSessions keyed vector
498                    class SuspendedSessionDesc : public RefBase {
499                    public:
500                        SuspendedSessionDesc() : mRefCount(0) {}
501
502                        int mRefCount;          // number of active suspend requests
503                        effect_uuid_t mType;    // effect type UUID
504                    };
505
506                    void        acquireWakeLock();
507                    void        acquireWakeLock_l();
508                    void        releaseWakeLock();
509                    void        releaseWakeLock_l();
510                    void setEffectSuspended_l(const effect_uuid_t *type,
511                                              bool suspend,
512                                              int sessionId = AUDIO_SESSION_OUTPUT_MIX);
513                    // updated mSuspendedSessions when an effect suspended or restored
514                    void        updateSuspendedSessions_l(const effect_uuid_t *type,
515                                                          bool suspend,
516                                                          int sessionId);
517                    // check if some effects must be suspended when an effect chain is added
518                    void checkSuspendOnAddEffectChain_l(const sp<EffectChain>& chain);
519                    // updated mSuspendedSessions when an effect chain is removed
520                    void updateSuspendedSessionsOnRemoveEffectChain_l(const sp<EffectChain>& chain);
521
522        friend class Track;
523        friend class TrackBase;
524        friend class PlaybackThread;
525        friend class MixerThread;
526        friend class DirectOutputThread;
527        friend class DuplicatingThread;
528        friend class RecordThread;
529        friend class RecordTrack;
530
531                    int                     mType;
532                    Condition               mWaitWorkCV;
533                    sp<AudioFlinger>        mAudioFlinger;
534                    uint32_t                mSampleRate;
535                    size_t                  mFrameCount;
536                    uint32_t                mChannelMask;
537                    uint16_t                mChannelCount;
538                    uint16_t                mFrameSize;
539                    uint32_t                mFormat;
540                    Condition               mParamCond;
541                    Vector<String8>         mNewParameters;
542                    status_t                mParamStatus;
543                    Vector<ConfigEvent *>   mConfigEvents;
544                    bool                    mStandby;
545                    int                     mId;
546                    bool                    mExiting;
547                    Vector< sp<EffectChain> > mEffectChains;
548                    uint32_t                mDevice;    // output device for PlaybackThread
549                                                        // input + output devices for RecordThread
550                    static const int        kNameLength = 32;
551                    char                    mName[kNameLength];
552                    sp<IPowerManager>       mPowerManager;
553                    sp<IBinder>             mWakeLockToken;
554                    sp<PMDeathRecipient>    mDeathRecipient;
555                    // list of suspended effects per session and per type. The first vector is
556                    // keyed by session ID, the second by type UUID timeLow field
557                    KeyedVector< int, KeyedVector< int, sp<SuspendedSessionDesc> > >  mSuspendedSessions;
558    };
559
560    // --- PlaybackThread ---
561    class PlaybackThread : public ThreadBase {
562    public:
563
564        enum mixer_state {
565            MIXER_IDLE,
566            MIXER_TRACKS_ENABLED,
567            MIXER_TRACKS_READY
568        };
569
570        // playback track
571        class Track : public TrackBase {
572        public:
573                                Track(  const wp<ThreadBase>& thread,
574                                        const sp<Client>& client,
575                                        int streamType,
576                                        uint32_t sampleRate,
577                                        uint32_t format,
578                                        uint32_t channelMask,
579                                        int frameCount,
580                                        const sp<IMemory>& sharedBuffer,
581                                        int sessionId);
582                                ~Track();
583
584                    void        dump(char* buffer, size_t size);
585            virtual status_t    start();
586            virtual void        stop();
587                    void        pause();
588
589                    void        flush();
590                    void        destroy();
591                    void        mute(bool);
592                    void        setVolume(float left, float right);
593                    int name() const {
594                        return mName;
595                    }
596
597                    int type() const {
598                        return mStreamType;
599                    }
600                    status_t    attachAuxEffect(int EffectId);
601                    void        setAuxBuffer(int EffectId, int32_t *buffer);
602                    int32_t     *auxBuffer() { return mAuxBuffer; }
603                    void        setMainBuffer(int16_t *buffer) { mMainBuffer = buffer; }
604                    int16_t     *mainBuffer() { return mMainBuffer; }
605                    int         auxEffectId() { return mAuxEffectId; }
606
607
608        protected:
609            friend class ThreadBase;
610            friend class AudioFlinger;
611            friend class TrackHandle;
612            friend class PlaybackThread;
613            friend class MixerThread;
614            friend class DirectOutputThread;
615
616                                Track(const Track&);
617                                Track& operator = (const Track&);
618
619            virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
620            bool isMuted() { return mMute; }
621            bool isPausing() const {
622                return mState == PAUSING;
623            }
624            bool isPaused() const {
625                return mState == PAUSED;
626            }
627            bool isReady() const;
628            void setPaused() { mState = PAUSED; }
629            void reset();
630
631            bool isOutputTrack() const {
632                return (mStreamType == AUDIO_STREAM_CNT);
633            }
634
635            // we don't really need a lock for these
636            float               mVolume[2];
637            volatile bool       mMute;
638            // FILLED state is used for suppressing volume ramp at begin of playing
639            enum {FS_FILLING, FS_FILLED, FS_ACTIVE};
640            mutable uint8_t     mFillingUpStatus;
641            int8_t              mRetryCount;
642            sp<IMemory>         mSharedBuffer;
643            bool                mResetDone;
644            int                 mStreamType;
645            int                 mName;
646            int16_t             *mMainBuffer;
647            int32_t             *mAuxBuffer;
648            int                 mAuxEffectId;
649            bool                mHasVolumeController;
650        };  // end of Track
651
652
653        // playback track
654        class OutputTrack : public Track {
655        public:
656
657            class Buffer: public AudioBufferProvider::Buffer {
658            public:
659                int16_t *mBuffer;
660            };
661
662                                OutputTrack(  const wp<ThreadBase>& thread,
663                                        DuplicatingThread *sourceThread,
664                                        uint32_t sampleRate,
665                                        uint32_t format,
666                                        uint32_t channelMask,
667                                        int frameCount);
668                                ~OutputTrack();
669
670            virtual status_t    start();
671            virtual void        stop();
672                    bool        write(int16_t* data, uint32_t frames);
673                    bool        bufferQueueEmpty() { return (mBufferQueue.size() == 0) ? true : false; }
674                    bool        isActive() { return mActive; }
675            wp<ThreadBase>&     thread()  { return mThread; }
676
677        private:
678
679            status_t            obtainBuffer(AudioBufferProvider::Buffer* buffer, uint32_t waitTimeMs);
680            void                clearBufferQueue();
681
682            // Maximum number of pending buffers allocated by OutputTrack::write()
683            static const uint8_t kMaxOverFlowBuffers = 10;
684
685            Vector < Buffer* >          mBufferQueue;
686            AudioBufferProvider::Buffer mOutBuffer;
687            bool                        mActive;
688            DuplicatingThread*          mSourceThread;
689        };  // end of OutputTrack
690
691        PlaybackThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device);
692        virtual             ~PlaybackThread();
693
694        virtual     status_t    dump(int fd, const Vector<String16>& args);
695
696        // Thread virtuals
697        virtual     status_t    readyToRun();
698        virtual     void        onFirstRef();
699
700        virtual     status_t    initCheck() const { return (mOutput == 0) ? NO_INIT : NO_ERROR; }
701
702        virtual     uint32_t    latency() const;
703
704        virtual     status_t    setMasterVolume(float value);
705        virtual     status_t    setMasterMute(bool muted);
706
707        virtual     float       masterVolume() const;
708        virtual     bool        masterMute() const;
709
710        virtual     status_t    setStreamVolume(int stream, float value);
711        virtual     status_t    setStreamMute(int stream, bool muted);
712
713        virtual     float       streamVolume(int stream) const;
714        virtual     bool        streamMute(int stream) const;
715
716                    sp<Track>   createTrack_l(
717                                    const sp<AudioFlinger::Client>& client,
718                                    int streamType,
719                                    uint32_t sampleRate,
720                                    uint32_t format,
721                                    uint32_t channelMask,
722                                    int frameCount,
723                                    const sp<IMemory>& sharedBuffer,
724                                    int sessionId,
725                                    status_t *status);
726
727                    AudioStreamOut* getOutput() { return mOutput; }
728                    virtual audio_stream_t* stream() { return &mOutput->stream->common; }
729
730                    void        suspend() { mSuspended++; }
731                    void        restore() { if (mSuspended) mSuspended--; }
732                    bool        isSuspended() { return (mSuspended != 0); }
733        virtual     String8     getParameters(const String8& keys);
734        virtual     void        audioConfigChanged_l(int event, int param = 0);
735        virtual     status_t    getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames);
736                    int16_t     *mixBuffer() { return mMixBuffer; };
737
738        virtual     void detachAuxEffect_l(int effectId);
739                    status_t attachAuxEffect(const sp<AudioFlinger::PlaybackThread::Track> track,
740                            int EffectId);
741                    status_t attachAuxEffect_l(const sp<AudioFlinger::PlaybackThread::Track> track,
742                            int EffectId);
743
744                    virtual status_t addEffectChain_l(const sp<EffectChain>& chain);
745                    virtual size_t removeEffectChain_l(const sp<EffectChain>& chain);
746                    virtual uint32_t hasAudioSession(int sessionId);
747                    virtual uint32_t getStrategyForSession_l(int sessionId);
748
749        struct  stream_type_t {
750            stream_type_t()
751                :   volume(1.0f),
752                    mute(false)
753            {
754            }
755            float       volume;
756            bool        mute;
757        };
758
759    protected:
760        int16_t*                        mMixBuffer;
761        int                             mSuspended;
762        int                             mBytesWritten;
763        bool                            mMasterMute;
764        SortedVector< wp<Track> >       mActiveTracks;
765
766        virtual int             getTrackName_l() = 0;
767        virtual void            deleteTrackName_l(int name) = 0;
768        virtual uint32_t        activeSleepTimeUs() = 0;
769        virtual uint32_t        idleSleepTimeUs() = 0;
770        virtual uint32_t        suspendSleepTimeUs() = 0;
771
772    private:
773
774        friend class AudioFlinger;
775        friend class OutputTrack;
776        friend class Track;
777        friend class TrackBase;
778        friend class MixerThread;
779        friend class DirectOutputThread;
780        friend class DuplicatingThread;
781
782        PlaybackThread(const Client&);
783        PlaybackThread& operator = (const PlaybackThread&);
784
785        status_t    addTrack_l(const sp<Track>& track);
786        void        destroyTrack_l(const sp<Track>& track);
787        void        removeTrack_l(const sp<Track>& track);
788
789        void        readOutputParameters();
790
791        virtual status_t    dumpInternals(int fd, const Vector<String16>& args);
792        status_t    dumpTracks(int fd, const Vector<String16>& args);
793
794        SortedVector< sp<Track> >       mTracks;
795        // mStreamTypes[] uses 1 additionnal stream type internally for the OutputTrack used by DuplicatingThread
796        stream_type_t                   mStreamTypes[AUDIO_STREAM_CNT + 1];
797        AudioStreamOut*                 mOutput;
798        float                           mMasterVolume;
799        nsecs_t                         mLastWriteTime;
800        int                             mNumWrites;
801        int                             mNumDelayedWrites;
802        bool                            mInWrite;
803    };
804
805    class MixerThread : public PlaybackThread {
806    public:
807        MixerThread (const sp<AudioFlinger>& audioFlinger,
808                     AudioStreamOut* output,
809                     int id,
810                     uint32_t device);
811        virtual             ~MixerThread();
812
813        // Thread virtuals
814        virtual     bool        threadLoop();
815
816                    void        invalidateTracks(int streamType);
817        virtual     bool        checkForNewParameters_l();
818        virtual     status_t    dumpInternals(int fd, const Vector<String16>& args);
819
820    protected:
821                    uint32_t    prepareTracks_l(const SortedVector< wp<Track> >& activeTracks,
822                                                Vector< sp<Track> > *tracksToRemove);
823        virtual     int         getTrackName_l();
824        virtual     void        deleteTrackName_l(int name);
825        virtual     uint32_t    activeSleepTimeUs();
826        virtual     uint32_t    idleSleepTimeUs();
827        virtual     uint32_t    suspendSleepTimeUs();
828
829        AudioMixer*                     mAudioMixer;
830    };
831
832    class DirectOutputThread : public PlaybackThread {
833    public:
834
835        DirectOutputThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device);
836        ~DirectOutputThread();
837
838        // Thread virtuals
839        virtual     bool        threadLoop();
840
841        virtual     bool        checkForNewParameters_l();
842
843    protected:
844        virtual     int         getTrackName_l();
845        virtual     void        deleteTrackName_l(int name);
846        virtual     uint32_t    activeSleepTimeUs();
847        virtual     uint32_t    idleSleepTimeUs();
848        virtual     uint32_t    suspendSleepTimeUs();
849
850    private:
851        void applyVolume(uint16_t leftVol, uint16_t rightVol, bool ramp);
852
853        float mLeftVolFloat;
854        float mRightVolFloat;
855        uint16_t mLeftVolShort;
856        uint16_t mRightVolShort;
857    };
858
859    class DuplicatingThread : public MixerThread {
860    public:
861        DuplicatingThread (const sp<AudioFlinger>& audioFlinger, MixerThread* mainThread, int id);
862        ~DuplicatingThread();
863
864        // Thread virtuals
865        virtual     bool        threadLoop();
866                    void        addOutputTrack(MixerThread* thread);
867                    void        removeOutputTrack(MixerThread* thread);
868                    uint32_t    waitTimeMs() { return mWaitTimeMs; }
869    protected:
870        virtual     uint32_t    activeSleepTimeUs();
871
872    private:
873                    bool        outputsReady(SortedVector< sp<OutputTrack> > &outputTracks);
874                    void        updateWaitTime();
875
876        SortedVector < sp<OutputTrack> >  mOutputTracks;
877                    uint32_t    mWaitTimeMs;
878    };
879
880              PlaybackThread *checkPlaybackThread_l(int output) const;
881              MixerThread *checkMixerThread_l(int output) const;
882              RecordThread *checkRecordThread_l(int input) const;
883              float streamVolumeInternal(int stream) const { return mStreamTypes[stream].volume; }
884              void audioConfigChanged_l(int event, int ioHandle, void *param2);
885
886              uint32_t nextUniqueId();
887              status_t moveEffectChain_l(int sessionId,
888                                     AudioFlinger::PlaybackThread *srcThread,
889                                     AudioFlinger::PlaybackThread *dstThread,
890                                     bool reRegister);
891              PlaybackThread *primaryPlaybackThread_l();
892              uint32_t primaryOutputDevice_l();
893
894    friend class AudioBuffer;
895
896    class TrackHandle : public android::BnAudioTrack {
897    public:
898                            TrackHandle(const sp<PlaybackThread::Track>& track);
899        virtual             ~TrackHandle();
900        virtual status_t    start();
901        virtual void        stop();
902        virtual void        flush();
903        virtual void        mute(bool);
904        virtual void        pause();
905        virtual void        setVolume(float left, float right);
906        virtual sp<IMemory> getCblk() const;
907        virtual status_t    attachAuxEffect(int effectId);
908        virtual status_t onTransact(
909            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
910    private:
911        sp<PlaybackThread::Track> mTrack;
912    };
913
914    friend class Client;
915    friend class PlaybackThread::Track;
916
917
918                void        removeClient_l(pid_t pid);
919                void        removeNotificationClient(pid_t pid);
920
921
922    // record thread
923    class RecordThread : public ThreadBase, public AudioBufferProvider
924    {
925    public:
926
927        // record track
928        class RecordTrack : public TrackBase {
929        public:
930                                RecordTrack(const wp<ThreadBase>& thread,
931                                        const sp<Client>& client,
932                                        uint32_t sampleRate,
933                                        uint32_t format,
934                                        uint32_t channelMask,
935                                        int frameCount,
936                                        uint32_t flags,
937                                        int sessionId);
938                                ~RecordTrack();
939
940            virtual status_t    start();
941            virtual void        stop();
942
943                    bool        overflow() { bool tmp = mOverflow; mOverflow = false; return tmp; }
944                    bool        setOverflow() { bool tmp = mOverflow; mOverflow = true; return tmp; }
945
946                    void        dump(char* buffer, size_t size);
947
948        private:
949            friend class AudioFlinger;
950            friend class RecordThread;
951
952                                RecordTrack(const RecordTrack&);
953                                RecordTrack& operator = (const RecordTrack&);
954
955            virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
956
957            bool                mOverflow;
958        };
959
960
961                RecordThread(const sp<AudioFlinger>& audioFlinger,
962                        AudioStreamIn *input,
963                        uint32_t sampleRate,
964                        uint32_t channels,
965                        int id,
966                        uint32_t device);
967                ~RecordThread();
968
969        virtual bool        threadLoop();
970        virtual status_t    readyToRun() { return NO_ERROR; }
971        virtual void        onFirstRef();
972
973        virtual status_t    initCheck() const { return (mInput == 0) ? NO_INIT : NO_ERROR; }
974                sp<AudioFlinger::RecordThread::RecordTrack>  createRecordTrack_l(
975                        const sp<AudioFlinger::Client>& client,
976                        uint32_t sampleRate,
977                        int format,
978                        int channelMask,
979                        int frameCount,
980                        uint32_t flags,
981                        int sessionId,
982                        status_t *status);
983
984                status_t    start(RecordTrack* recordTrack);
985                void        stop(RecordTrack* recordTrack);
986                status_t    dump(int fd, const Vector<String16>& args);
987                AudioStreamIn* getInput() { return mInput; }
988                virtual audio_stream_t* stream() { return &mInput->stream->common; }
989
990        virtual status_t    getNextBuffer(AudioBufferProvider::Buffer* buffer);
991        virtual void        releaseBuffer(AudioBufferProvider::Buffer* buffer);
992        virtual bool        checkForNewParameters_l();
993        virtual String8     getParameters(const String8& keys);
994        virtual void        audioConfigChanged_l(int event, int param = 0);
995                void        readInputParameters();
996        virtual unsigned int  getInputFramesLost();
997
998        virtual status_t addEffectChain_l(const sp<EffectChain>& chain);
999        virtual size_t removeEffectChain_l(const sp<EffectChain>& chain);
1000        virtual uint32_t hasAudioSession(int sessionId);
1001                RecordTrack* track();
1002
1003    private:
1004                RecordThread();
1005                AudioStreamIn                       *mInput;
1006                RecordTrack*                        mTrack;
1007                sp<RecordTrack>                     mActiveTrack;
1008                Condition                           mStartStopCond;
1009                AudioResampler                      *mResampler;
1010                int32_t                             *mRsmpOutBuffer;
1011                int16_t                             *mRsmpInBuffer;
1012                size_t                              mRsmpInIndex;
1013                size_t                              mInputBytes;
1014                int                                 mReqChannelCount;
1015                uint32_t                            mReqSampleRate;
1016                ssize_t                             mBytesRead;
1017    };
1018
1019    class RecordHandle : public android::BnAudioRecord {
1020    public:
1021        RecordHandle(const sp<RecordThread::RecordTrack>& recordTrack);
1022        virtual             ~RecordHandle();
1023        virtual status_t    start();
1024        virtual void        stop();
1025        virtual sp<IMemory> getCblk() const;
1026        virtual status_t onTransact(
1027            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
1028    private:
1029        sp<RecordThread::RecordTrack> mRecordTrack;
1030    };
1031
1032    //--- Audio Effect Management
1033
1034    // EffectModule and EffectChain classes both have their own mutex to protect
1035    // state changes or resource modifications. Always respect the following order
1036    // if multiple mutexes must be acquired to avoid cross deadlock:
1037    // AudioFlinger -> ThreadBase -> EffectChain -> EffectModule
1038
1039    // The EffectModule class is a wrapper object controlling the effect engine implementation
1040    // in the effect library. It prevents concurrent calls to process() and command() functions
1041    // from different client threads. It keeps a list of EffectHandle objects corresponding
1042    // to all client applications using this effect and notifies applications of effect state,
1043    // control or parameter changes. It manages the activation state machine to send appropriate
1044    // reset, enable, disable commands to effect engine and provide volume
1045    // ramping when effects are activated/deactivated.
1046    // When controlling an auxiliary effect, the EffectModule also provides an input buffer used by
1047    // the attached track(s) to accumulate their auxiliary channel.
1048    class EffectModule: public RefBase {
1049    public:
1050        EffectModule(const wp<ThreadBase>& wThread,
1051                        const wp<AudioFlinger::EffectChain>& chain,
1052                        effect_descriptor_t *desc,
1053                        int id,
1054                        int sessionId);
1055        ~EffectModule();
1056
1057        enum effect_state {
1058            IDLE,
1059            RESTART,
1060            STARTING,
1061            ACTIVE,
1062            STOPPING,
1063            STOPPED,
1064            DESTROYED
1065        };
1066
1067        int         id() { return mId; }
1068        void process();
1069        void updateState();
1070        status_t command(uint32_t cmdCode,
1071                         uint32_t cmdSize,
1072                         void *pCmdData,
1073                         uint32_t *replySize,
1074                         void *pReplyData);
1075
1076        void reset_l();
1077        status_t configure();
1078        status_t init();
1079        uint32_t state() {
1080            return mState;
1081        }
1082        uint32_t status() {
1083            return mStatus;
1084        }
1085        int sessionId() {
1086            return mSessionId;
1087        }
1088        status_t    setEnabled(bool enabled);
1089        bool isEnabled();
1090        bool isProcessEnabled();
1091
1092        void        setInBuffer(int16_t *buffer) { mConfig.inputCfg.buffer.s16 = buffer; }
1093        int16_t     *inBuffer() { return mConfig.inputCfg.buffer.s16; }
1094        void        setOutBuffer(int16_t *buffer) { mConfig.outputCfg.buffer.s16 = buffer; }
1095        int16_t     *outBuffer() { return mConfig.outputCfg.buffer.s16; }
1096        void        setChain(const wp<EffectChain>& chain) { mChain = chain; }
1097        void        setThread(const wp<ThreadBase>& thread) { mThread = thread; }
1098        wp<ThreadBase>& thread() { return mThread; }
1099
1100        status_t addHandle(sp<EffectHandle>& handle);
1101        void disconnect(const wp<EffectHandle>& handle);
1102        size_t removeHandle (const wp<EffectHandle>& handle);
1103
1104        effect_descriptor_t& desc() { return mDescriptor; }
1105        wp<EffectChain>&     chain() { return mChain; }
1106
1107        status_t         setDevice(uint32_t device);
1108        status_t         setVolume(uint32_t *left, uint32_t *right, bool controller);
1109        status_t         setMode(uint32_t mode);
1110        status_t         stop();
1111        void             setSuspended(bool suspended);
1112        bool             suspended();
1113
1114        sp<EffectHandle> controlHandle();
1115
1116        status_t         dump(int fd, const Vector<String16>& args);
1117
1118    protected:
1119
1120        // Maximum time allocated to effect engines to complete the turn off sequence
1121        static const uint32_t MAX_DISABLE_TIME_MS = 10000;
1122
1123        EffectModule(const EffectModule&);
1124        EffectModule& operator = (const EffectModule&);
1125
1126        status_t start_l();
1127        status_t stop_l();
1128
1129        Mutex               mLock;      // mutex for process, commands and handles list protection
1130        wp<ThreadBase>      mThread;    // parent thread
1131        wp<EffectChain>     mChain;     // parent effect chain
1132        int                 mId;        // this instance unique ID
1133        int                 mSessionId; // audio session ID
1134        effect_descriptor_t mDescriptor;// effect descriptor received from effect engine
1135        effect_config_t     mConfig;    // input and output audio configuration
1136        effect_handle_t  mEffectInterface; // Effect module C API
1137        status_t mStatus;               // initialization status
1138        uint32_t mState;                // current activation state (effect_state)
1139        Vector< wp<EffectHandle> > mHandles;    // list of client handles
1140        uint32_t mMaxDisableWaitCnt;    // maximum grace period before forcing an effect off after
1141                                        // sending disable command.
1142        uint32_t mDisableWaitCnt;       // current process() calls count during disable period.
1143        bool     mSuspended;            // effect is suspended: temporarily disabled by framework
1144    };
1145
1146    // The EffectHandle class implements the IEffect interface. It provides resources
1147    // to receive parameter updates, keeps track of effect control
1148    // ownership and state and has a pointer to the EffectModule object it is controlling.
1149    // There is one EffectHandle object for each application controlling (or using)
1150    // an effect module.
1151    // The EffectHandle is obtained by calling AudioFlinger::createEffect().
1152    class EffectHandle: public android::BnEffect {
1153    public:
1154
1155        EffectHandle(const sp<EffectModule>& effect,
1156                const sp<AudioFlinger::Client>& client,
1157                const sp<IEffectClient>& effectClient,
1158                int32_t priority);
1159        virtual ~EffectHandle();
1160
1161        // IEffect
1162        virtual status_t enable();
1163        virtual status_t disable();
1164        virtual status_t command(uint32_t cmdCode,
1165                                 uint32_t cmdSize,
1166                                 void *pCmdData,
1167                                 uint32_t *replySize,
1168                                 void *pReplyData);
1169        virtual void disconnect();
1170        virtual sp<IMemory> getCblk() const;
1171        virtual status_t onTransact(uint32_t code, const Parcel& data,
1172                Parcel* reply, uint32_t flags);
1173
1174
1175        // Give or take control of effect module
1176        // - hasControl: true if control is given, false if removed
1177        // - signal: true client app should be signaled of change, false otherwise
1178        // - enabled: state of the effect when control is passed
1179        void setControl(bool hasControl, bool signal, bool enabled);
1180        void commandExecuted(uint32_t cmdCode,
1181                             uint32_t cmdSize,
1182                             void *pCmdData,
1183                             uint32_t replySize,
1184                             void *pReplyData);
1185        void setEnabled(bool enabled);
1186        bool enabled() { return mEnabled; }
1187
1188        // Getters
1189        int id() { return mEffect->id(); }
1190        int priority() { return mPriority; }
1191        bool hasControl() { return mHasControl; }
1192        sp<EffectModule> effect() { return mEffect; }
1193
1194        void dump(char* buffer, size_t size);
1195
1196    protected:
1197
1198        EffectHandle(const EffectHandle&);
1199        EffectHandle& operator =(const EffectHandle&);
1200
1201        sp<EffectModule> mEffect;           // pointer to controlled EffectModule
1202        sp<IEffectClient> mEffectClient;    // callback interface for client notifications
1203        sp<Client>          mClient;        // client for shared memory allocation
1204        sp<IMemory>         mCblkMemory;    // shared memory for control block
1205        effect_param_cblk_t* mCblk;         // control block for deferred parameter setting via shared memory
1206        uint8_t*            mBuffer;        // pointer to parameter area in shared memory
1207        int mPriority;                      // client application priority to control the effect
1208        bool mHasControl;                   // true if this handle is controlling the effect
1209        bool mEnabled;                      // cached enable state: needed when the effect is
1210                                            // restored after being suspended
1211    };
1212
1213    // the EffectChain class represents a group of effects associated to one audio session.
1214    // There can be any number of EffectChain objects per output mixer thread (PlaybackThread).
1215    // The EffecChain with session ID 0 contains global effects applied to the output mix.
1216    // Effects in this chain can be insert or auxiliary. Effects in other chains (attached to tracks)
1217    // are insert only. The EffectChain maintains an ordered list of effect module, the order corresponding
1218    // in the effect process order. When attached to a track (session ID != 0), it also provide it's own
1219    // input buffer used by the track as accumulation buffer.
1220    class EffectChain: public RefBase {
1221    public:
1222        EffectChain(const wp<ThreadBase>& wThread, int sessionId);
1223        ~EffectChain();
1224
1225        // special key used for an entry in mSuspendedEffects keyed vector
1226        // corresponding to a suspend all request.
1227        static const int        kKeyForSuspendAll = 0;
1228
1229        void process_l();
1230
1231        void lock() {
1232            mLock.lock();
1233        }
1234        void unlock() {
1235            mLock.unlock();
1236        }
1237
1238        status_t addEffect_l(const sp<EffectModule>& handle);
1239        size_t removeEffect_l(const sp<EffectModule>& handle);
1240
1241        int sessionId() { return mSessionId; }
1242        void setSessionId(int sessionId) { mSessionId = sessionId; }
1243
1244        sp<EffectModule> getEffectFromDesc_l(effect_descriptor_t *descriptor);
1245        sp<EffectModule> getEffectFromId_l(int id);
1246        sp<EffectModule> getEffectFromType_l(const effect_uuid_t *type);
1247        bool setVolume_l(uint32_t *left, uint32_t *right);
1248        void setDevice_l(uint32_t device);
1249        void setMode_l(uint32_t mode);
1250
1251        void setInBuffer(int16_t *buffer, bool ownsBuffer = false) {
1252            mInBuffer = buffer;
1253            mOwnInBuffer = ownsBuffer;
1254        }
1255        int16_t *inBuffer() {
1256            return mInBuffer;
1257        }
1258        void setOutBuffer(int16_t *buffer) {
1259            mOutBuffer = buffer;
1260        }
1261        int16_t *outBuffer() {
1262            return mOutBuffer;
1263        }
1264
1265        void incTrackCnt() { android_atomic_inc(&mTrackCnt); }
1266        void decTrackCnt() { android_atomic_dec(&mTrackCnt); }
1267        int32_t trackCnt() { return mTrackCnt;}
1268
1269        void incActiveTrackCnt() { android_atomic_inc(&mActiveTrackCnt); }
1270        void decActiveTrackCnt() { android_atomic_dec(&mActiveTrackCnt); }
1271        int32_t activeTrackCnt() { return mActiveTrackCnt;}
1272
1273        uint32_t strategy() { return mStrategy; }
1274        void setStrategy(uint32_t strategy)
1275                 { mStrategy = strategy; }
1276
1277        // suspend effect of the given type
1278        void setEffectSuspended_l(const effect_uuid_t *type,
1279                                  bool suspend);
1280        // suspend all eligible effects
1281        void setEffectSuspendedAll_l(bool suspend);
1282        // check if effects should be suspend or restored when a given effect is enable or disabled
1283        virtual void checkSuspendOnEffectEnabled(const sp<EffectModule>& effect,
1284                                              bool enabled);
1285
1286        status_t dump(int fd, const Vector<String16>& args);
1287
1288    protected:
1289
1290        EffectChain(const EffectChain&);
1291        EffectChain& operator =(const EffectChain&);
1292
1293        class SuspendedEffectDesc : public RefBase {
1294        public:
1295            SuspendedEffectDesc() : mRefCount(0) {}
1296
1297            int mRefCount;
1298            effect_uuid_t mType;
1299            wp<EffectModule> mEffect;
1300        };
1301
1302        // get a list of effect modules to suspend when an effect of the type
1303        // passed is enabled.
1304        Vector< sp<EffectModule> > getSuspendEligibleEffects();
1305        // get an effect module if it is currently enable
1306        sp<EffectModule> getEffectIfEnabled(const effect_uuid_t *type);
1307
1308        wp<ThreadBase> mThread;     // parent mixer thread
1309        Mutex mLock;                // mutex protecting effect list
1310        Vector<sp<EffectModule> > mEffects; // list of effect modules
1311        int mSessionId;             // audio session ID
1312        int16_t *mInBuffer;         // chain input buffer
1313        int16_t *mOutBuffer;        // chain output buffer
1314        volatile int32_t mActiveTrackCnt;  // number of active tracks connected
1315        volatile int32_t mTrackCnt;        // number of tracks connected
1316        bool mOwnInBuffer;          // true if the chain owns its input buffer
1317        int mVolumeCtrlIdx;         // index of insert effect having control over volume
1318        uint32_t mLeftVolume;       // previous volume on left channel
1319        uint32_t mRightVolume;      // previous volume on right channel
1320        uint32_t mNewLeftVolume;       // new volume on left channel
1321        uint32_t mNewRightVolume;      // new volume on right channel
1322        uint32_t mStrategy; // strategy for this effect chain
1323        // mSuspendedEffects lists all effect currently suspended in the chain
1324        // use effect type UUID timelow field as key. There is no real risk of identical
1325        // timeLow fields among effect type UUIDs.
1326        KeyedVector< int, sp<SuspendedEffectDesc> > mSuspendedEffects;
1327    };
1328
1329    struct AudioStreamOut {
1330        audio_hw_device_t   *hwDev;
1331        audio_stream_out_t  *stream;
1332
1333        AudioStreamOut(audio_hw_device_t *dev, audio_stream_out_t *out) :
1334            hwDev(dev), stream(out) {}
1335    };
1336
1337    struct AudioStreamIn {
1338        audio_hw_device_t   *hwDev;
1339        audio_stream_in_t   *stream;
1340
1341        AudioStreamIn(audio_hw_device_t *dev, audio_stream_in_t *in) :
1342            hwDev(dev), stream(in) {}
1343    };
1344
1345    friend class RecordThread;
1346    friend class PlaybackThread;
1347
1348    mutable     Mutex                               mLock;
1349
1350                DefaultKeyedVector< pid_t, wp<Client> >     mClients;
1351
1352                mutable     Mutex                   mHardwareLock;
1353                audio_hw_device_t*                  mPrimaryHardwareDev;
1354                Vector<audio_hw_device_t*>          mAudioHwDevs;
1355    mutable     int                                 mHardwareStatus;
1356
1357
1358                DefaultKeyedVector< int, sp<PlaybackThread> >  mPlaybackThreads;
1359                PlaybackThread::stream_type_t       mStreamTypes[AUDIO_STREAM_CNT];
1360                float                               mMasterVolume;
1361                bool                                mMasterMute;
1362
1363                DefaultKeyedVector< int, sp<RecordThread> >    mRecordThreads;
1364
1365                DefaultKeyedVector< pid_t, sp<NotificationClient> >    mNotificationClients;
1366                volatile int32_t                    mNextUniqueId;
1367                uint32_t                            mMode;
1368                bool                                mBtNrec;
1369
1370};
1371
1372
1373// ----------------------------------------------------------------------------
1374
1375}; // namespace android
1376
1377#endif // ANDROID_AUDIO_FLINGER_H
1378