AudioFlinger.h revision 59255e4fc7d8ff52874b85b1988dc0785140cf81 
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
209private:
210                            AudioFlinger();
211    virtual                 ~AudioFlinger();
212
213    status_t                initCheck() const;
214    virtual     void        onFirstRef();
215    audio_hw_device_t*      findSuitableHwDev_l(uint32_t devices);
216
217    // Internal dump utilites.
218    status_t dumpPermissionDenial(int fd, const Vector<String16>& args);
219    status_t dumpClients(int fd, const Vector<String16>& args);
220    status_t dumpInternals(int fd, const Vector<String16>& args);
221
222    // --- Client ---
223    class Client : public RefBase {
224    public:
225                            Client(const sp<AudioFlinger>& audioFlinger, pid_t pid);
226        virtual             ~Client();
227        const sp<MemoryDealer>&     heap() const;
228        pid_t               pid() const { return mPid; }
229        sp<AudioFlinger>    audioFlinger() { return mAudioFlinger; }
230
231    private:
232                            Client(const Client&);
233                            Client& operator = (const Client&);
234        sp<AudioFlinger>    mAudioFlinger;
235        sp<MemoryDealer>    mMemoryDealer;
236        pid_t               mPid;
237    };
238
239    // --- Notification Client ---
240    class NotificationClient : public IBinder::DeathRecipient {
241    public:
242                            NotificationClient(const sp<AudioFlinger>& audioFlinger,
243                                                const sp<IAudioFlingerClient>& client,
244                                                pid_t pid);
245        virtual             ~NotificationClient();
246
247                sp<IAudioFlingerClient>    client() { return mClient; }
248
249                // IBinder::DeathRecipient
250                virtual     void        binderDied(const wp<IBinder>& who);
251
252    private:
253                            NotificationClient(const NotificationClient&);
254                            NotificationClient& operator = (const NotificationClient&);
255
256        sp<AudioFlinger>        mAudioFlinger;
257        pid_t                   mPid;
258        sp<IAudioFlingerClient> mClient;
259    };
260
261    class TrackHandle;
262    class RecordHandle;
263    class RecordThread;
264    class PlaybackThread;
265    class MixerThread;
266    class DirectOutputThread;
267    class DuplicatingThread;
268    class Track;
269    class RecordTrack;
270    class EffectModule;
271    class EffectHandle;
272    class EffectChain;
273    struct AudioStreamOut;
274    struct AudioStreamIn;
275
276    class ThreadBase : public Thread {
277    public:
278        ThreadBase (const sp<AudioFlinger>& audioFlinger, int id, uint32_t device);
279        virtual             ~ThreadBase();
280
281
282        enum type {
283            MIXER,              // Thread class is MixerThread
284            DIRECT,             // Thread class is DirectOutputThread
285            DUPLICATING,        // Thread class is DuplicatingThread
286            RECORD              // Thread class is RecordThread
287        };
288
289        status_t dumpBase(int fd, const Vector<String16>& args);
290        status_t dumpEffectChains(int fd, const Vector<String16>& args);
291
292        void clearPowerManager();
293
294        // base for record and playback
295        class TrackBase : public AudioBufferProvider, public RefBase {
296
297        public:
298            enum track_state {
299                IDLE,
300                TERMINATED,
301                STOPPED,
302                RESUMING,
303                ACTIVE,
304                PAUSING,
305                PAUSED
306            };
307
308            enum track_flags {
309                STEPSERVER_FAILED = 0x01, //  StepServer could not acquire cblk->lock mutex
310                SYSTEM_FLAGS_MASK = 0x0000ffffUL,
311                // The upper 16 bits are used for track-specific flags.
312            };
313
314                                TrackBase(const wp<ThreadBase>& thread,
315                                        const sp<Client>& client,
316                                        uint32_t sampleRate,
317                                        uint32_t format,
318                                        uint32_t channelMask,
319                                        int frameCount,
320                                        uint32_t flags,
321                                        const sp<IMemory>& sharedBuffer,
322                                        int sessionId);
323                                ~TrackBase();
324
325            virtual status_t    start() = 0;
326            virtual void        stop() = 0;
327                    sp<IMemory> getCblk() const;
328                    audio_track_cblk_t* cblk() const { return mCblk; }
329                    int         sessionId() { return mSessionId; }
330
331        protected:
332            friend class ThreadBase;
333            friend class RecordHandle;
334            friend class PlaybackThread;
335            friend class RecordThread;
336            friend class MixerThread;
337            friend class DirectOutputThread;
338
339                                TrackBase(const TrackBase&);
340                                TrackBase& operator = (const TrackBase&);
341
342            virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer) = 0;
343            virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer);
344
345            uint32_t format() const {
346                return mFormat;
347            }
348
349            int channelCount() const ;
350
351            uint32_t channelMask() const;
352
353            int sampleRate() const;
354
355            void* getBuffer(uint32_t offset, uint32_t frames) const;
356
357            bool isStopped() const {
358                return mState == STOPPED;
359            }
360
361            bool isTerminated() const {
362                return mState == TERMINATED;
363            }
364
365            bool step();
366            void reset();
367
368            wp<ThreadBase>      mThread;
369            sp<Client>          mClient;
370            sp<IMemory>         mCblkMemory;
371            audio_track_cblk_t* mCblk;
372            void*               mBuffer;
373            void*               mBufferEnd;
374            uint32_t            mFrameCount;
375            // we don't really need a lock for these
376            int                 mState;
377            int                 mClientTid;
378            uint32_t            mFormat;
379            uint32_t            mFlags;
380            int                 mSessionId;
381            uint8_t             mChannelCount;
382            uint32_t            mChannelMask;
383        };
384
385        class ConfigEvent {
386        public:
387            ConfigEvent() : mEvent(0), mParam(0) {}
388
389            int mEvent;
390            int mParam;
391        };
392
393        class PMDeathRecipient : public IBinder::DeathRecipient {
394        public:
395                        PMDeathRecipient(const wp<ThreadBase>& thread) : mThread(thread) {}
396            virtual     ~PMDeathRecipient() {}
397
398            // IBinder::DeathRecipient
399            virtual     void        binderDied(const wp<IBinder>& who);
400
401        private:
402                        PMDeathRecipient(const PMDeathRecipient&);
403                        PMDeathRecipient& operator = (const PMDeathRecipient&);
404
405            wp<ThreadBase> mThread;
406        };
407
408        virtual     status_t    initCheck() const = 0;
409                    int         type() const { return mType; }
410                    uint32_t    sampleRate() const;
411                    int         channelCount() const;
412                    uint32_t    format() const;
413                    size_t      frameCount() const;
414                    void        wakeUp()    { mWaitWorkCV.broadcast(); }
415                    void        exit();
416        virtual     bool        checkForNewParameters_l() = 0;
417        virtual     status_t    setParameters(const String8& keyValuePairs);
418        virtual     String8     getParameters(const String8& keys) = 0;
419        virtual     void        audioConfigChanged_l(int event, int param = 0) = 0;
420                    void        sendConfigEvent(int event, int param = 0);
421                    void        sendConfigEvent_l(int event, int param = 0);
422                    void        processConfigEvents();
423                    int         id() const { return mId;}
424                    bool        standby() { return mStandby; }
425                    uint32_t    device() { return mDevice; }
426        virtual     audio_stream_t* stream() = 0;
427
428                    sp<EffectHandle> createEffect_l(
429                                        const sp<AudioFlinger::Client>& client,
430                                        const sp<IEffectClient>& effectClient,
431                                        int32_t priority,
432                                        int sessionId,
433                                        effect_descriptor_t *desc,
434                                        int *enabled,
435                                        status_t *status);
436                    void disconnectEffect(const sp< EffectModule>& effect,
437                                          const wp<EffectHandle>& handle);
438
439                    // return values for hasAudioSession (bit field)
440                    enum effect_state {
441                        EFFECT_SESSION = 0x1,   // the audio session corresponds to at least one
442                                                // effect
443                        TRACK_SESSION = 0x2     // the audio session corresponds to at least one
444                                                // track
445                    };
446
447                    // get effect chain corresponding to session Id.
448                    sp<EffectChain> getEffectChain(int sessionId);
449                    // same as getEffectChain() but must be called with ThreadBase mutex locked
450                    sp<EffectChain> getEffectChain_l(int sessionId);
451                    // add an effect chain to the chain list (mEffectChains)
452        virtual     status_t addEffectChain_l(const sp<EffectChain>& chain) = 0;
453                    // remove an effect chain from the chain list (mEffectChains)
454        virtual     size_t removeEffectChain_l(const sp<EffectChain>& chain) = 0;
455                    // lock mall effect chains Mutexes. Must be called before releasing the
456                    // ThreadBase mutex before processing the mixer and effects. This guarantees the
457                    // integrity of the chains during the process.
458                    void lockEffectChains_l(Vector<sp <EffectChain> >& effectChains);
459                    // unlock effect chains after process
460                    void unlockEffectChains(Vector<sp <EffectChain> >& effectChains);
461                    // set audio mode to all effect chains
462                    void setMode(uint32_t mode);
463                    // get effect module with corresponding ID on specified audio session
464                    sp<AudioFlinger::EffectModule> getEffect_l(int sessionId, int effectId);
465                    // add and effect module. Also creates the effect chain is none exists for
466                    // the effects audio session
467                    status_t addEffect_l(const sp< EffectModule>& effect);
468                    // remove and effect module. Also removes the effect chain is this was the last
469                    // effect
470                    void removeEffect_l(const sp< EffectModule>& effect);
471                    // detach all tracks connected to an auxiliary effect
472        virtual     void detachAuxEffect_l(int effectId) {}
473                    // returns either EFFECT_SESSION if effects on this audio session exist in one
474                    // chain, or TRACK_SESSION if tracks on this audio session exist, or both
475                    virtual uint32_t hasAudioSession(int sessionId) = 0;
476                    // the value returned by default implementation is not important as the
477                    // strategy is only meaningful for PlaybackThread which implements this method
478                    virtual uint32_t getStrategyForSession_l(int sessionId) { return 0; }
479
480                    // suspend or restore effect according to the type of effect passed. a NULL
481                    // type pointer means suspend all effects in the session
482                    void setEffectSuspended(const effect_uuid_t *type,
483                                            bool suspend,
484                                            int sessionId = AUDIO_SESSION_OUTPUT_MIX);
485                    // check if some effects must be suspended/restored when an effect is enabled
486                    // or disabled
487        virtual     void checkSuspendOnEffectEnabled(const sp<EffectModule>& effect,
488                                                     bool enabled,
489                                                     int sessionId = AUDIO_SESSION_OUTPUT_MIX);
490
491        mutable     Mutex                   mLock;
492
493    protected:
494
495                    // entry describing an effect being suspended in mSuspendedSessions keyed vector
496                    class SuspendedSessionDesc : public RefBase {
497                    public:
498                        SuspendedSessionDesc() : mRefCount(0) {}
499
500                        int mRefCount;          // number of active suspend requests
501                        effect_uuid_t mType;    // effect type UUID
502                    };
503
504                    void        acquireWakeLock();
505                    void        acquireWakeLock_l();
506                    void        releaseWakeLock();
507                    void        releaseWakeLock_l();
508                    void setEffectSuspended_l(const effect_uuid_t *type,
509                                              bool suspend,
510                                              int sessionId = AUDIO_SESSION_OUTPUT_MIX);
511                    // updated mSuspendedSessions when an effect suspended or restored
512                    void        updateSuspendedSessions_l(const effect_uuid_t *type,
513                                                          bool suspend,
514                                                          int sessionId);
515                    // check if some effects must be suspended when an effect chain is added
516                    void checkSuspendOnAddEffectChain_l(const sp<EffectChain>& chain);
517                    // updated mSuspendedSessions when an effect chain is removed
518                    void updateSuspendedSessionsOnRemoveEffectChain_l(const sp<EffectChain>& chain);
519
520        friend class Track;
521        friend class TrackBase;
522        friend class PlaybackThread;
523        friend class MixerThread;
524        friend class DirectOutputThread;
525        friend class DuplicatingThread;
526        friend class RecordThread;
527        friend class RecordTrack;
528
529                    int                     mType;
530                    Condition               mWaitWorkCV;
531                    sp<AudioFlinger>        mAudioFlinger;
532                    uint32_t                mSampleRate;
533                    size_t                  mFrameCount;
534                    uint32_t                mChannelMask;
535                    uint16_t                mChannelCount;
536                    uint16_t                mFrameSize;
537                    uint32_t                mFormat;
538                    Condition               mParamCond;
539                    Vector<String8>         mNewParameters;
540                    status_t                mParamStatus;
541                    Vector<ConfigEvent *>   mConfigEvents;
542                    bool                    mStandby;
543                    int                     mId;
544                    bool                    mExiting;
545                    Vector< sp<EffectChain> > mEffectChains;
546                    uint32_t                mDevice;    // output device for PlaybackThread
547                                                        // input + output devices for RecordThread
548                    static const int        kNameLength = 32;
549                    char                    mName[kNameLength];
550                    sp<IPowerManager>       mPowerManager;
551                    sp<IBinder>             mWakeLockToken;
552                    sp<PMDeathRecipient>    mDeathRecipient;
553                    // list of suspended effects per session and per type. The first vector is
554                    // keyed by session ID, the second by type UUID timeLow field
555                    KeyedVector< int, KeyedVector< int, sp<SuspendedSessionDesc> > >  mSuspendedSessions;
556    };
557
558    // --- PlaybackThread ---
559    class PlaybackThread : public ThreadBase {
560    public:
561
562        enum mixer_state {
563            MIXER_IDLE,
564            MIXER_TRACKS_ENABLED,
565            MIXER_TRACKS_READY
566        };
567
568        // playback track
569        class Track : public TrackBase {
570        public:
571                                Track(  const wp<ThreadBase>& thread,
572                                        const sp<Client>& client,
573                                        int streamType,
574                                        uint32_t sampleRate,
575                                        uint32_t format,
576                                        uint32_t channelMask,
577                                        int frameCount,
578                                        const sp<IMemory>& sharedBuffer,
579                                        int sessionId);
580                                ~Track();
581
582                    void        dump(char* buffer, size_t size);
583            virtual status_t    start();
584            virtual void        stop();
585                    void        pause();
586
587                    void        flush();
588                    void        destroy();
589                    void        mute(bool);
590                    void        setVolume(float left, float right);
591                    int name() const {
592                        return mName;
593                    }
594
595                    int type() const {
596                        return mStreamType;
597                    }
598                    status_t    attachAuxEffect(int EffectId);
599                    void        setAuxBuffer(int EffectId, int32_t *buffer);
600                    int32_t     *auxBuffer() { return mAuxBuffer; }
601                    void        setMainBuffer(int16_t *buffer) { mMainBuffer = buffer; }
602                    int16_t     *mainBuffer() { return mMainBuffer; }
603                    int         auxEffectId() { return mAuxEffectId; }
604
605
606        protected:
607            friend class ThreadBase;
608            friend class AudioFlinger;
609            friend class TrackHandle;
610            friend class PlaybackThread;
611            friend class MixerThread;
612            friend class DirectOutputThread;
613
614                                Track(const Track&);
615                                Track& operator = (const Track&);
616
617            virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
618            bool isMuted() { return mMute; }
619            bool isPausing() const {
620                return mState == PAUSING;
621            }
622            bool isPaused() const {
623                return mState == PAUSED;
624            }
625            bool isReady() const;
626            void setPaused() { mState = PAUSED; }
627            void reset();
628
629            bool isOutputTrack() const {
630                return (mStreamType == AUDIO_STREAM_CNT);
631            }
632
633            // we don't really need a lock for these
634            float               mVolume[2];
635            volatile bool       mMute;
636            // FILLED state is used for suppressing volume ramp at begin of playing
637            enum {FS_FILLING, FS_FILLED, FS_ACTIVE};
638            mutable uint8_t     mFillingUpStatus;
639            int8_t              mRetryCount;
640            sp<IMemory>         mSharedBuffer;
641            bool                mResetDone;
642            int                 mStreamType;
643            int                 mName;
644            int16_t             *mMainBuffer;
645            int32_t             *mAuxBuffer;
646            int                 mAuxEffectId;
647            bool                mHasVolumeController;
648        };  // end of Track
649
650
651        // playback track
652        class OutputTrack : public Track {
653        public:
654
655            class Buffer: public AudioBufferProvider::Buffer {
656            public:
657                int16_t *mBuffer;
658            };
659
660                                OutputTrack(  const wp<ThreadBase>& thread,
661                                        DuplicatingThread *sourceThread,
662                                        uint32_t sampleRate,
663                                        uint32_t format,
664                                        uint32_t channelMask,
665                                        int frameCount);
666                                ~OutputTrack();
667
668            virtual status_t    start();
669            virtual void        stop();
670                    bool        write(int16_t* data, uint32_t frames);
671                    bool        bufferQueueEmpty() { return (mBufferQueue.size() == 0) ? true : false; }
672                    bool        isActive() { return mActive; }
673            wp<ThreadBase>&     thread()  { return mThread; }
674
675        private:
676
677            status_t            obtainBuffer(AudioBufferProvider::Buffer* buffer, uint32_t waitTimeMs);
678            void                clearBufferQueue();
679
680            // Maximum number of pending buffers allocated by OutputTrack::write()
681            static const uint8_t kMaxOverFlowBuffers = 10;
682
683            Vector < Buffer* >          mBufferQueue;
684            AudioBufferProvider::Buffer mOutBuffer;
685            bool                        mActive;
686            DuplicatingThread*          mSourceThread;
687        };  // end of OutputTrack
688
689        PlaybackThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device);
690        virtual             ~PlaybackThread();
691
692        virtual     status_t    dump(int fd, const Vector<String16>& args);
693
694        // Thread virtuals
695        virtual     status_t    readyToRun();
696        virtual     void        onFirstRef();
697
698        virtual     status_t    initCheck() const { return (mOutput == 0) ? NO_INIT : NO_ERROR; }
699
700        virtual     uint32_t    latency() const;
701
702        virtual     status_t    setMasterVolume(float value);
703        virtual     status_t    setMasterMute(bool muted);
704
705        virtual     float       masterVolume() const;
706        virtual     bool        masterMute() const;
707
708        virtual     status_t    setStreamVolume(int stream, float value);
709        virtual     status_t    setStreamMute(int stream, bool muted);
710
711        virtual     float       streamVolume(int stream) const;
712        virtual     bool        streamMute(int stream) const;
713
714                    sp<Track>   createTrack_l(
715                                    const sp<AudioFlinger::Client>& client,
716                                    int streamType,
717                                    uint32_t sampleRate,
718                                    uint32_t format,
719                                    uint32_t channelMask,
720                                    int frameCount,
721                                    const sp<IMemory>& sharedBuffer,
722                                    int sessionId,
723                                    status_t *status);
724
725                    AudioStreamOut* getOutput() { return mOutput; }
726                    virtual audio_stream_t* stream() { return &mOutput->stream->common; }
727
728                    void        suspend() { mSuspended++; }
729                    void        restore() { if (mSuspended) mSuspended--; }
730                    bool        isSuspended() { return (mSuspended != 0); }
731        virtual     String8     getParameters(const String8& keys);
732        virtual     void        audioConfigChanged_l(int event, int param = 0);
733        virtual     status_t    getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames);
734                    int16_t     *mixBuffer() { return mMixBuffer; };
735
736        virtual     void detachAuxEffect_l(int effectId);
737                    status_t attachAuxEffect(const sp<AudioFlinger::PlaybackThread::Track> track,
738                            int EffectId);
739                    status_t attachAuxEffect_l(const sp<AudioFlinger::PlaybackThread::Track> track,
740                            int EffectId);
741
742                    virtual status_t addEffectChain_l(const sp<EffectChain>& chain);
743                    virtual size_t removeEffectChain_l(const sp<EffectChain>& chain);
744                    virtual uint32_t hasAudioSession(int sessionId);
745                    virtual uint32_t getStrategyForSession_l(int sessionId);
746
747        struct  stream_type_t {
748            stream_type_t()
749                :   volume(1.0f),
750                    mute(false)
751            {
752            }
753            float       volume;
754            bool        mute;
755        };
756
757    protected:
758        int16_t*                        mMixBuffer;
759        int                             mSuspended;
760        int                             mBytesWritten;
761        bool                            mMasterMute;
762        SortedVector< wp<Track> >       mActiveTracks;
763
764        virtual int             getTrackName_l() = 0;
765        virtual void            deleteTrackName_l(int name) = 0;
766        virtual uint32_t        activeSleepTimeUs() = 0;
767        virtual uint32_t        idleSleepTimeUs() = 0;
768        virtual uint32_t        suspendSleepTimeUs() = 0;
769
770    private:
771
772        friend class AudioFlinger;
773        friend class OutputTrack;
774        friend class Track;
775        friend class TrackBase;
776        friend class MixerThread;
777        friend class DirectOutputThread;
778        friend class DuplicatingThread;
779
780        PlaybackThread(const Client&);
781        PlaybackThread& operator = (const PlaybackThread&);
782
783        status_t    addTrack_l(const sp<Track>& track);
784        void        destroyTrack_l(const sp<Track>& track);
785        void        removeTrack_l(const sp<Track>& track);
786
787        void        readOutputParameters();
788
789        virtual status_t    dumpInternals(int fd, const Vector<String16>& args);
790        status_t    dumpTracks(int fd, const Vector<String16>& args);
791
792        SortedVector< sp<Track> >       mTracks;
793        // mStreamTypes[] uses 1 additionnal stream type internally for the OutputTrack used by DuplicatingThread
794        stream_type_t                   mStreamTypes[AUDIO_STREAM_CNT + 1];
795        AudioStreamOut*                 mOutput;
796        float                           mMasterVolume;
797        nsecs_t                         mLastWriteTime;
798        int                             mNumWrites;
799        int                             mNumDelayedWrites;
800        bool                            mInWrite;
801    };
802
803    class MixerThread : public PlaybackThread {
804    public:
805        MixerThread (const sp<AudioFlinger>& audioFlinger,
806                     AudioStreamOut* output,
807                     int id,
808                     uint32_t device);
809        virtual             ~MixerThread();
810
811        // Thread virtuals
812        virtual     bool        threadLoop();
813
814                    void        invalidateTracks(int streamType);
815        virtual     bool        checkForNewParameters_l();
816        virtual     status_t    dumpInternals(int fd, const Vector<String16>& args);
817
818    protected:
819                    uint32_t    prepareTracks_l(const SortedVector< wp<Track> >& activeTracks,
820                                                Vector< sp<Track> > *tracksToRemove);
821        virtual     int         getTrackName_l();
822        virtual     void        deleteTrackName_l(int name);
823        virtual     uint32_t    activeSleepTimeUs();
824        virtual     uint32_t    idleSleepTimeUs();
825        virtual     uint32_t    suspendSleepTimeUs();
826
827        AudioMixer*                     mAudioMixer;
828    };
829
830    class DirectOutputThread : public PlaybackThread {
831    public:
832
833        DirectOutputThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device);
834        ~DirectOutputThread();
835
836        // Thread virtuals
837        virtual     bool        threadLoop();
838
839        virtual     bool        checkForNewParameters_l();
840
841    protected:
842        virtual     int         getTrackName_l();
843        virtual     void        deleteTrackName_l(int name);
844        virtual     uint32_t    activeSleepTimeUs();
845        virtual     uint32_t    idleSleepTimeUs();
846        virtual     uint32_t    suspendSleepTimeUs();
847
848    private:
849        void applyVolume(uint16_t leftVol, uint16_t rightVol, bool ramp);
850
851        float mLeftVolFloat;
852        float mRightVolFloat;
853        uint16_t mLeftVolShort;
854        uint16_t mRightVolShort;
855    };
856
857    class DuplicatingThread : public MixerThread {
858    public:
859        DuplicatingThread (const sp<AudioFlinger>& audioFlinger, MixerThread* mainThread, int id);
860        ~DuplicatingThread();
861
862        // Thread virtuals
863        virtual     bool        threadLoop();
864                    void        addOutputTrack(MixerThread* thread);
865                    void        removeOutputTrack(MixerThread* thread);
866                    uint32_t    waitTimeMs() { return mWaitTimeMs; }
867    protected:
868        virtual     uint32_t    activeSleepTimeUs();
869
870    private:
871                    bool        outputsReady(SortedVector< sp<OutputTrack> > &outputTracks);
872                    void        updateWaitTime();
873
874        SortedVector < sp<OutputTrack> >  mOutputTracks;
875                    uint32_t    mWaitTimeMs;
876    };
877
878              PlaybackThread *checkPlaybackThread_l(int output) const;
879              MixerThread *checkMixerThread_l(int output) const;
880              RecordThread *checkRecordThread_l(int input) const;
881              float streamVolumeInternal(int stream) const { return mStreamTypes[stream].volume; }
882              void audioConfigChanged_l(int event, int ioHandle, void *param2);
883
884              uint32_t nextUniqueId();
885              status_t moveEffectChain_l(int sessionId,
886                                     AudioFlinger::PlaybackThread *srcThread,
887                                     AudioFlinger::PlaybackThread *dstThread,
888                                     bool reRegister);
889              PlaybackThread *primaryPlaybackThread_l();
890              uint32_t primaryOutputDevice_l();
891
892    friend class AudioBuffer;
893
894    class TrackHandle : public android::BnAudioTrack {
895    public:
896                            TrackHandle(const sp<PlaybackThread::Track>& track);
897        virtual             ~TrackHandle();
898        virtual status_t    start();
899        virtual void        stop();
900        virtual void        flush();
901        virtual void        mute(bool);
902        virtual void        pause();
903        virtual void        setVolume(float left, float right);
904        virtual sp<IMemory> getCblk() const;
905        virtual status_t    attachAuxEffect(int effectId);
906        virtual status_t onTransact(
907            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
908    private:
909        sp<PlaybackThread::Track> mTrack;
910    };
911
912    friend class Client;
913    friend class PlaybackThread::Track;
914
915
916                void        removeClient_l(pid_t pid);
917                void        removeNotificationClient(pid_t pid);
918
919
920    // record thread
921    class RecordThread : public ThreadBase, public AudioBufferProvider
922    {
923    public:
924
925        // record track
926        class RecordTrack : public TrackBase {
927        public:
928                                RecordTrack(const wp<ThreadBase>& thread,
929                                        const sp<Client>& client,
930                                        uint32_t sampleRate,
931                                        uint32_t format,
932                                        uint32_t channelMask,
933                                        int frameCount,
934                                        uint32_t flags,
935                                        int sessionId);
936                                ~RecordTrack();
937
938            virtual status_t    start();
939            virtual void        stop();
940
941                    bool        overflow() { bool tmp = mOverflow; mOverflow = false; return tmp; }
942                    bool        setOverflow() { bool tmp = mOverflow; mOverflow = true; return tmp; }
943
944                    void        dump(char* buffer, size_t size);
945
946        private:
947            friend class AudioFlinger;
948            friend class RecordThread;
949
950                                RecordTrack(const RecordTrack&);
951                                RecordTrack& operator = (const RecordTrack&);
952
953            virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
954
955            bool                mOverflow;
956        };
957
958
959                RecordThread(const sp<AudioFlinger>& audioFlinger,
960                        AudioStreamIn *input,
961                        uint32_t sampleRate,
962                        uint32_t channels,
963                        int id,
964                        uint32_t device);
965                ~RecordThread();
966
967        virtual bool        threadLoop();
968        virtual status_t    readyToRun() { return NO_ERROR; }
969        virtual void        onFirstRef();
970
971        virtual status_t    initCheck() const { return (mInput == 0) ? NO_INIT : NO_ERROR; }
972                sp<AudioFlinger::RecordThread::RecordTrack>  createRecordTrack_l(
973                        const sp<AudioFlinger::Client>& client,
974                        uint32_t sampleRate,
975                        int format,
976                        int channelMask,
977                        int frameCount,
978                        uint32_t flags,
979                        int sessionId,
980                        status_t *status);
981
982                status_t    start(RecordTrack* recordTrack);
983                void        stop(RecordTrack* recordTrack);
984                status_t    dump(int fd, const Vector<String16>& args);
985                AudioStreamIn* getInput() { return mInput; }
986                virtual audio_stream_t* stream() { return &mInput->stream->common; }
987
988        virtual status_t    getNextBuffer(AudioBufferProvider::Buffer* buffer);
989        virtual void        releaseBuffer(AudioBufferProvider::Buffer* buffer);
990        virtual bool        checkForNewParameters_l();
991        virtual String8     getParameters(const String8& keys);
992        virtual void        audioConfigChanged_l(int event, int param = 0);
993                void        readInputParameters();
994        virtual unsigned int  getInputFramesLost();
995
996        virtual status_t addEffectChain_l(const sp<EffectChain>& chain);
997        virtual size_t removeEffectChain_l(const sp<EffectChain>& chain);
998        virtual uint32_t hasAudioSession(int sessionId);
999
1000    private:
1001                RecordThread();
1002                AudioStreamIn                       *mInput;
1003                RecordTrack*                        mTrack;
1004                sp<RecordTrack>                     mActiveTrack;
1005                Condition                           mStartStopCond;
1006                AudioResampler                      *mResampler;
1007                int32_t                             *mRsmpOutBuffer;
1008                int16_t                             *mRsmpInBuffer;
1009                size_t                              mRsmpInIndex;
1010                size_t                              mInputBytes;
1011                int                                 mReqChannelCount;
1012                uint32_t                            mReqSampleRate;
1013                ssize_t                             mBytesRead;
1014    };
1015
1016    class RecordHandle : public android::BnAudioRecord {
1017    public:
1018        RecordHandle(const sp<RecordThread::RecordTrack>& recordTrack);
1019        virtual             ~RecordHandle();
1020        virtual status_t    start();
1021        virtual void        stop();
1022        virtual sp<IMemory> getCblk() const;
1023        virtual status_t onTransact(
1024            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
1025    private:
1026        sp<RecordThread::RecordTrack> mRecordTrack;
1027    };
1028
1029    //--- Audio Effect Management
1030
1031    // EffectModule and EffectChain classes both have their own mutex to protect
1032    // state changes or resource modifications. Always respect the following order
1033    // if multiple mutexes must be acquired to avoid cross deadlock:
1034    // AudioFlinger -> ThreadBase -> EffectChain -> EffectModule
1035
1036    // The EffectModule class is a wrapper object controlling the effect engine implementation
1037    // in the effect library. It prevents concurrent calls to process() and command() functions
1038    // from different client threads. It keeps a list of EffectHandle objects corresponding
1039    // to all client applications using this effect and notifies applications of effect state,
1040    // control or parameter changes. It manages the activation state machine to send appropriate
1041    // reset, enable, disable commands to effect engine and provide volume
1042    // ramping when effects are activated/deactivated.
1043    // When controlling an auxiliary effect, the EffectModule also provides an input buffer used by
1044    // the attached track(s) to accumulate their auxiliary channel.
1045    class EffectModule: public RefBase {
1046    public:
1047        EffectModule(const wp<ThreadBase>& wThread,
1048                        const wp<AudioFlinger::EffectChain>& chain,
1049                        effect_descriptor_t *desc,
1050                        int id,
1051                        int sessionId);
1052        ~EffectModule();
1053
1054        enum effect_state {
1055            IDLE,
1056            RESTART,
1057            STARTING,
1058            ACTIVE,
1059            STOPPING,
1060            STOPPED,
1061            DESTROYED
1062        };
1063
1064        int         id() { return mId; }
1065        void process();
1066        void updateState();
1067        status_t command(uint32_t cmdCode,
1068                         uint32_t cmdSize,
1069                         void *pCmdData,
1070                         uint32_t *replySize,
1071                         void *pReplyData);
1072
1073        void reset_l();
1074        status_t configure();
1075        status_t init();
1076        uint32_t state() {
1077            return mState;
1078        }
1079        uint32_t status() {
1080            return mStatus;
1081        }
1082        int sessionId() {
1083            return mSessionId;
1084        }
1085        status_t    setEnabled(bool enabled);
1086        bool isEnabled();
1087        bool isProcessEnabled();
1088
1089        void        setInBuffer(int16_t *buffer) { mConfig.inputCfg.buffer.s16 = buffer; }
1090        int16_t     *inBuffer() { return mConfig.inputCfg.buffer.s16; }
1091        void        setOutBuffer(int16_t *buffer) { mConfig.outputCfg.buffer.s16 = buffer; }
1092        int16_t     *outBuffer() { return mConfig.outputCfg.buffer.s16; }
1093        void        setChain(const wp<EffectChain>& chain) { mChain = chain; }
1094        void        setThread(const wp<ThreadBase>& thread) { mThread = thread; }
1095        wp<ThreadBase>& thread() { return mThread; }
1096
1097        status_t addHandle(sp<EffectHandle>& handle);
1098        void disconnect(const wp<EffectHandle>& handle);
1099        size_t removeHandle (const wp<EffectHandle>& handle);
1100
1101        effect_descriptor_t& desc() { return mDescriptor; }
1102        wp<EffectChain>&     chain() { return mChain; }
1103
1104        status_t         setDevice(uint32_t device);
1105        status_t         setVolume(uint32_t *left, uint32_t *right, bool controller);
1106        status_t         setMode(uint32_t mode);
1107        status_t         stop();
1108        void             setSuspended(bool suspended);
1109        bool             suspended();
1110
1111        sp<EffectHandle> controlHandle();
1112
1113        status_t         dump(int fd, const Vector<String16>& args);
1114
1115    protected:
1116
1117        // Maximum time allocated to effect engines to complete the turn off sequence
1118        static const uint32_t MAX_DISABLE_TIME_MS = 10000;
1119
1120        EffectModule(const EffectModule&);
1121        EffectModule& operator = (const EffectModule&);
1122
1123        status_t start_l();
1124        status_t stop_l();
1125
1126        Mutex               mLock;      // mutex for process, commands and handles list protection
1127        wp<ThreadBase>      mThread;    // parent thread
1128        wp<EffectChain>     mChain;     // parent effect chain
1129        int                 mId;        // this instance unique ID
1130        int                 mSessionId; // audio session ID
1131        effect_descriptor_t mDescriptor;// effect descriptor received from effect engine
1132        effect_config_t     mConfig;    // input and output audio configuration
1133        effect_handle_t  mEffectInterface; // Effect module C API
1134        status_t mStatus;               // initialization status
1135        uint32_t mState;                // current activation state (effect_state)
1136        Vector< wp<EffectHandle> > mHandles;    // list of client handles
1137        uint32_t mMaxDisableWaitCnt;    // maximum grace period before forcing an effect off after
1138                                        // sending disable command.
1139        uint32_t mDisableWaitCnt;       // current process() calls count during disable period.
1140        bool     mSuspended;            // effect is suspended: temporarily disabled by framework
1141    };
1142
1143    // The EffectHandle class implements the IEffect interface. It provides resources
1144    // to receive parameter updates, keeps track of effect control
1145    // ownership and state and has a pointer to the EffectModule object it is controlling.
1146    // There is one EffectHandle object for each application controlling (or using)
1147    // an effect module.
1148    // The EffectHandle is obtained by calling AudioFlinger::createEffect().
1149    class EffectHandle: public android::BnEffect {
1150    public:
1151
1152        EffectHandle(const sp<EffectModule>& effect,
1153                const sp<AudioFlinger::Client>& client,
1154                const sp<IEffectClient>& effectClient,
1155                int32_t priority);
1156        virtual ~EffectHandle();
1157
1158        // IEffect
1159        virtual status_t enable();
1160        virtual status_t disable();
1161        virtual status_t command(uint32_t cmdCode,
1162                                 uint32_t cmdSize,
1163                                 void *pCmdData,
1164                                 uint32_t *replySize,
1165                                 void *pReplyData);
1166        virtual void disconnect();
1167        virtual sp<IMemory> getCblk() const;
1168        virtual status_t onTransact(uint32_t code, const Parcel& data,
1169                Parcel* reply, uint32_t flags);
1170
1171
1172        // Give or take control of effect module
1173        // - hasControl: true if control is given, false if removed
1174        // - signal: true client app should be signaled of change, false otherwise
1175        // - enabled: state of the effect when control is passed
1176        void setControl(bool hasControl, bool signal, bool enabled);
1177        void commandExecuted(uint32_t cmdCode,
1178                             uint32_t cmdSize,
1179                             void *pCmdData,
1180                             uint32_t replySize,
1181                             void *pReplyData);
1182        void setEnabled(bool enabled);
1183        bool enabled() { return mEnabled; }
1184
1185        // Getters
1186        int id() { return mEffect->id(); }
1187        int priority() { return mPriority; }
1188        bool hasControl() { return mHasControl; }
1189        sp<EffectModule> effect() { return mEffect; }
1190
1191        void dump(char* buffer, size_t size);
1192
1193    protected:
1194
1195        EffectHandle(const EffectHandle&);
1196        EffectHandle& operator =(const EffectHandle&);
1197
1198        sp<EffectModule> mEffect;           // pointer to controlled EffectModule
1199        sp<IEffectClient> mEffectClient;    // callback interface for client notifications
1200        sp<Client>          mClient;        // client for shared memory allocation
1201        sp<IMemory>         mCblkMemory;    // shared memory for control block
1202        effect_param_cblk_t* mCblk;         // control block for deferred parameter setting via shared memory
1203        uint8_t*            mBuffer;        // pointer to parameter area in shared memory
1204        int mPriority;                      // client application priority to control the effect
1205        bool mHasControl;                   // true if this handle is controlling the effect
1206        bool mEnabled;                      // cached enable state: needed when the effect is
1207                                            // restored after being suspended
1208    };
1209
1210    // the EffectChain class represents a group of effects associated to one audio session.
1211    // There can be any number of EffectChain objects per output mixer thread (PlaybackThread).
1212    // The EffecChain with session ID 0 contains global effects applied to the output mix.
1213    // Effects in this chain can be insert or auxiliary. Effects in other chains (attached to tracks)
1214    // are insert only. The EffectChain maintains an ordered list of effect module, the order corresponding
1215    // in the effect process order. When attached to a track (session ID != 0), it also provide it's own
1216    // input buffer used by the track as accumulation buffer.
1217    class EffectChain: public RefBase {
1218    public:
1219        EffectChain(const wp<ThreadBase>& wThread, int sessionId);
1220        ~EffectChain();
1221
1222        // special key used for an entry in mSuspendedEffects keyed vector
1223        // corresponding to a suspend all request.
1224        static const int        kKeyForSuspendAll = 0;
1225
1226        void process_l();
1227
1228        void lock() {
1229            mLock.lock();
1230        }
1231        void unlock() {
1232            mLock.unlock();
1233        }
1234
1235        status_t addEffect_l(const sp<EffectModule>& handle);
1236        size_t removeEffect_l(const sp<EffectModule>& handle);
1237
1238        int sessionId() { return mSessionId; }
1239        void setSessionId(int sessionId) { mSessionId = sessionId; }
1240
1241        sp<EffectModule> getEffectFromDesc_l(effect_descriptor_t *descriptor);
1242        sp<EffectModule> getEffectFromId_l(int id);
1243        sp<EffectModule> getEffectFromType_l(const effect_uuid_t *type);
1244        bool setVolume_l(uint32_t *left, uint32_t *right);
1245        void setDevice_l(uint32_t device);
1246        void setMode_l(uint32_t mode);
1247
1248        void setInBuffer(int16_t *buffer, bool ownsBuffer = false) {
1249            mInBuffer = buffer;
1250            mOwnInBuffer = ownsBuffer;
1251        }
1252        int16_t *inBuffer() {
1253            return mInBuffer;
1254        }
1255        void setOutBuffer(int16_t *buffer) {
1256            mOutBuffer = buffer;
1257        }
1258        int16_t *outBuffer() {
1259            return mOutBuffer;
1260        }
1261
1262        void incTrackCnt() { android_atomic_inc(&mTrackCnt); }
1263        void decTrackCnt() { android_atomic_dec(&mTrackCnt); }
1264        int32_t trackCnt() { return mTrackCnt;}
1265
1266        void incActiveTrackCnt() { android_atomic_inc(&mActiveTrackCnt); }
1267        void decActiveTrackCnt() { android_atomic_dec(&mActiveTrackCnt); }
1268        int32_t activeTrackCnt() { return mActiveTrackCnt;}
1269
1270        uint32_t strategy() { return mStrategy; }
1271        void setStrategy(uint32_t strategy)
1272                 { mStrategy = strategy; }
1273
1274        // suspend effect of the given type
1275        void setEffectSuspended_l(const effect_uuid_t *type,
1276                                  bool suspend);
1277        // suspend all eligible effects
1278        void setEffectSuspendedAll_l(bool suspend);
1279        // check if effects should be suspend or restored when a given effect is enable or disabled
1280        virtual void checkSuspendOnEffectEnabled(const sp<EffectModule>& effect,
1281                                              bool enabled);
1282
1283        status_t dump(int fd, const Vector<String16>& args);
1284
1285    protected:
1286
1287        EffectChain(const EffectChain&);
1288        EffectChain& operator =(const EffectChain&);
1289
1290        class SuspendedEffectDesc : public RefBase {
1291        public:
1292            SuspendedEffectDesc() : mRefCount(0) {}
1293
1294            int mRefCount;
1295            effect_uuid_t mType;
1296            wp<EffectModule> mEffect;
1297        };
1298
1299        // get a list of effect modules to suspend when an effect of the type
1300        // passed is enabled.
1301        Vector< sp<EffectModule> > getSuspendEligibleEffects();
1302        // get an effect module if it is currently enable
1303        sp<EffectModule> getEffectIfEnabled(const effect_uuid_t *type);
1304
1305        wp<ThreadBase> mThread;     // parent mixer thread
1306        Mutex mLock;                // mutex protecting effect list
1307        Vector<sp<EffectModule> > mEffects; // list of effect modules
1308        int mSessionId;             // audio session ID
1309        int16_t *mInBuffer;         // chain input buffer
1310        int16_t *mOutBuffer;        // chain output buffer
1311        volatile int32_t mActiveTrackCnt;  // number of active tracks connected
1312        volatile int32_t mTrackCnt;        // number of tracks connected
1313        bool mOwnInBuffer;          // true if the chain owns its input buffer
1314        int mVolumeCtrlIdx;         // index of insert effect having control over volume
1315        uint32_t mLeftVolume;       // previous volume on left channel
1316        uint32_t mRightVolume;      // previous volume on right channel
1317        uint32_t mNewLeftVolume;       // new volume on left channel
1318        uint32_t mNewRightVolume;      // new volume on right channel
1319        uint32_t mStrategy; // strategy for this effect chain
1320        // mSuspendedEffects lists all effect currently suspended in the chain
1321        // use effect type UUID timelow field as key. There is no real risk of identical
1322        // timeLow fields among effect type UUIDs.
1323        KeyedVector< int, sp<SuspendedEffectDesc> > mSuspendedEffects;
1324    };
1325
1326    struct AudioStreamOut {
1327        audio_hw_device_t   *hwDev;
1328        audio_stream_out_t  *stream;
1329
1330        AudioStreamOut(audio_hw_device_t *dev, audio_stream_out_t *out) :
1331            hwDev(dev), stream(out) {}
1332    };
1333
1334    struct AudioStreamIn {
1335        audio_hw_device_t   *hwDev;
1336        audio_stream_in_t   *stream;
1337
1338        AudioStreamIn(audio_hw_device_t *dev, audio_stream_in_t *in) :
1339            hwDev(dev), stream(in) {}
1340    };
1341
1342    friend class RecordThread;
1343    friend class PlaybackThread;
1344
1345    mutable     Mutex                               mLock;
1346
1347                DefaultKeyedVector< pid_t, wp<Client> >     mClients;
1348
1349                mutable     Mutex                   mHardwareLock;
1350                audio_hw_device_t*                  mPrimaryHardwareDev;
1351                Vector<audio_hw_device_t*>          mAudioHwDevs;
1352    mutable     int                                 mHardwareStatus;
1353
1354
1355                DefaultKeyedVector< int, sp<PlaybackThread> >  mPlaybackThreads;
1356                PlaybackThread::stream_type_t       mStreamTypes[AUDIO_STREAM_CNT];
1357                float                               mMasterVolume;
1358                bool                                mMasterMute;
1359
1360                DefaultKeyedVector< int, sp<RecordThread> >    mRecordThreads;
1361
1362                DefaultKeyedVector< pid_t, sp<NotificationClient> >    mNotificationClients;
1363                volatile int32_t                    mNextUniqueId;
1364                uint32_t mMode;
1365
1366};
1367
1368
1369// ----------------------------------------------------------------------------
1370
1371}; // namespace android
1372
1373#endif // ANDROID_AUDIO_FLINGER_H
1374