AudioFlinger.cpp revision 59255e4fc7d8ff52874b85b1988dc0785140cf81 
1/* //device/include/server/AudioFlinger/AudioFlinger.cpp
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
19#define LOG_TAG "AudioFlinger"
20//#define LOG_NDEBUG 0
21
22#include <math.h>
23#include <signal.h>
24#include <sys/time.h>
25#include <sys/resource.h>
26
27#include <binder/IPCThreadState.h>
28#include <binder/IServiceManager.h>
29#include <utils/Log.h>
30#include <binder/Parcel.h>
31#include <binder/IPCThreadState.h>
32#include <utils/String16.h>
33#include <utils/threads.h>
34#include <utils/Atomic.h>
35
36#include <cutils/bitops.h>
37#include <cutils/properties.h>
38
39#include <media/AudioTrack.h>
40#include <media/AudioRecord.h>
41#include <media/IMediaPlayerService.h>
42
43#include <private/media/AudioTrackShared.h>
44#include <private/media/AudioEffectShared.h>
45
46#include <system/audio.h>
47#include <hardware/audio.h>
48
49#include "AudioMixer.h"
50#include "AudioFlinger.h"
51
52#include <media/EffectsFactoryApi.h>
53#include <audio_effects/effect_visualizer.h>
54
55#include <cpustats/ThreadCpuUsage.h>
56#include <powermanager/PowerManager.h>
57// #define DEBUG_CPU_USAGE 10  // log statistics every n wall clock seconds
58
59// ----------------------------------------------------------------------------
60
61
62namespace android {
63
64static const char* kDeadlockedString = "AudioFlinger may be deadlocked\n";
65static const char* kHardwareLockedString = "Hardware lock is taken\n";
66
67//static const nsecs_t kStandbyTimeInNsecs = seconds(3);
68static const float MAX_GAIN = 4096.0f;
69static const float MAX_GAIN_INT = 0x1000;
70
71// retry counts for buffer fill timeout
72// 50 * ~20msecs = 1 second
73static const int8_t kMaxTrackRetries = 50;
74static const int8_t kMaxTrackStartupRetries = 50;
75// allow less retry attempts on direct output thread.
76// direct outputs can be a scarce resource in audio hardware and should
77// be released as quickly as possible.
78static const int8_t kMaxTrackRetriesDirect = 2;
79
80static const int kDumpLockRetries = 50;
81static const int kDumpLockSleep = 20000;
82
83static const nsecs_t kWarningThrottle = seconds(5);
84
85// RecordThread loop sleep time upon application overrun or audio HAL read error
86static const int kRecordThreadSleepUs = 5000;
87
88// ----------------------------------------------------------------------------
89
90static bool recordingAllowed() {
91    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
92    bool ok = checkCallingPermission(String16("android.permission.RECORD_AUDIO"));
93    if (!ok) LOGE("Request requires android.permission.RECORD_AUDIO");
94    return ok;
95}
96
97static bool settingsAllowed() {
98    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
99    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
100    if (!ok) LOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
101    return ok;
102}
103
104// To collect the amplifier usage
105static void addBatteryData(uint32_t params) {
106    sp<IBinder> binder =
107        defaultServiceManager()->getService(String16("media.player"));
108    sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(binder);
109    if (service.get() == NULL) {
110        LOGW("Cannot connect to the MediaPlayerService for battery tracking");
111        return;
112    }
113
114    service->addBatteryData(params);
115}
116
117static int load_audio_interface(const char *if_name, const hw_module_t **mod,
118                                audio_hw_device_t **dev)
119{
120    int rc;
121
122    rc = hw_get_module_by_class(AUDIO_HARDWARE_MODULE_ID, if_name, mod);
123    if (rc)
124        goto out;
125
126    rc = audio_hw_device_open(*mod, dev);
127    LOGE_IF(rc, "couldn't open audio hw device in %s.%s (%s)",
128            AUDIO_HARDWARE_MODULE_ID, if_name, strerror(-rc));
129    if (rc)
130        goto out;
131
132    return 0;
133
134out:
135    *mod = NULL;
136    *dev = NULL;
137    return rc;
138}
139
140static const char *audio_interfaces[] = {
141    "primary",
142    "a2dp",
143    "usb",
144};
145#define ARRAY_SIZE(x) (sizeof((x))/sizeof(((x)[0])))
146
147// ----------------------------------------------------------------------------
148
149AudioFlinger::AudioFlinger()
150    : BnAudioFlinger(),
151        mPrimaryHardwareDev(0), mMasterVolume(1.0f), mMasterMute(false), mNextUniqueId(1)
152{
153}
154
155void AudioFlinger::onFirstRef()
156{
157    int rc = 0;
158
159    Mutex::Autolock _l(mLock);
160
161    /* TODO: move all this work into an Init() function */
162    mHardwareStatus = AUDIO_HW_IDLE;
163
164    for (size_t i = 0; i < ARRAY_SIZE(audio_interfaces); i++) {
165        const hw_module_t *mod;
166        audio_hw_device_t *dev;
167
168        rc = load_audio_interface(audio_interfaces[i], &mod, &dev);
169        if (rc)
170            continue;
171
172        LOGI("Loaded %s audio interface from %s (%s)", audio_interfaces[i],
173             mod->name, mod->id);
174        mAudioHwDevs.push(dev);
175
176        if (!mPrimaryHardwareDev) {
177            mPrimaryHardwareDev = dev;
178            LOGI("Using '%s' (%s.%s) as the primary audio interface",
179                 mod->name, mod->id, audio_interfaces[i]);
180        }
181    }
182
183    mHardwareStatus = AUDIO_HW_INIT;
184
185    if (!mPrimaryHardwareDev || mAudioHwDevs.size() == 0) {
186        LOGE("Primary audio interface not found");
187        return;
188    }
189
190    for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
191        audio_hw_device_t *dev = mAudioHwDevs[i];
192
193        mHardwareStatus = AUDIO_HW_INIT;
194        rc = dev->init_check(dev);
195        if (rc == 0) {
196            AutoMutex lock(mHardwareLock);
197
198            mMode = AUDIO_MODE_NORMAL;
199            mHardwareStatus = AUDIO_HW_SET_MODE;
200            dev->set_mode(dev, mMode);
201            mHardwareStatus = AUDIO_HW_SET_MASTER_VOLUME;
202            dev->set_master_volume(dev, 1.0f);
203            mHardwareStatus = AUDIO_HW_IDLE;
204        }
205    }
206}
207
208status_t AudioFlinger::initCheck() const
209{
210    Mutex::Autolock _l(mLock);
211    if (mPrimaryHardwareDev == NULL || mAudioHwDevs.size() == 0)
212        return NO_INIT;
213    return NO_ERROR;
214}
215
216AudioFlinger::~AudioFlinger()
217{
218    int num_devs = mAudioHwDevs.size();
219
220    while (!mRecordThreads.isEmpty()) {
221        // closeInput() will remove first entry from mRecordThreads
222        closeInput(mRecordThreads.keyAt(0));
223    }
224    while (!mPlaybackThreads.isEmpty()) {
225        // closeOutput() will remove first entry from mPlaybackThreads
226        closeOutput(mPlaybackThreads.keyAt(0));
227    }
228
229    for (int i = 0; i < num_devs; i++) {
230        audio_hw_device_t *dev = mAudioHwDevs[i];
231        audio_hw_device_close(dev);
232    }
233    mAudioHwDevs.clear();
234}
235
236audio_hw_device_t* AudioFlinger::findSuitableHwDev_l(uint32_t devices)
237{
238    /* first matching HW device is returned */
239    for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
240        audio_hw_device_t *dev = mAudioHwDevs[i];
241        if ((dev->get_supported_devices(dev) & devices) == devices)
242            return dev;
243    }
244    return NULL;
245}
246
247status_t AudioFlinger::dumpClients(int fd, const Vector<String16>& args)
248{
249    const size_t SIZE = 256;
250    char buffer[SIZE];
251    String8 result;
252
253    result.append("Clients:\n");
254    for (size_t i = 0; i < mClients.size(); ++i) {
255        wp<Client> wClient = mClients.valueAt(i);
256        if (wClient != 0) {
257            sp<Client> client = wClient.promote();
258            if (client != 0) {
259                snprintf(buffer, SIZE, "  pid: %d\n", client->pid());
260                result.append(buffer);
261            }
262        }
263    }
264    write(fd, result.string(), result.size());
265    return NO_ERROR;
266}
267
268
269status_t AudioFlinger::dumpInternals(int fd, const Vector<String16>& args)
270{
271    const size_t SIZE = 256;
272    char buffer[SIZE];
273    String8 result;
274    int hardwareStatus = mHardwareStatus;
275
276    snprintf(buffer, SIZE, "Hardware status: %d\n", hardwareStatus);
277    result.append(buffer);
278    write(fd, result.string(), result.size());
279    return NO_ERROR;
280}
281
282status_t AudioFlinger::dumpPermissionDenial(int fd, const Vector<String16>& args)
283{
284    const size_t SIZE = 256;
285    char buffer[SIZE];
286    String8 result;
287    snprintf(buffer, SIZE, "Permission Denial: "
288            "can't dump AudioFlinger from pid=%d, uid=%d\n",
289            IPCThreadState::self()->getCallingPid(),
290            IPCThreadState::self()->getCallingUid());
291    result.append(buffer);
292    write(fd, result.string(), result.size());
293    return NO_ERROR;
294}
295
296static bool tryLock(Mutex& mutex)
297{
298    bool locked = false;
299    for (int i = 0; i < kDumpLockRetries; ++i) {
300        if (mutex.tryLock() == NO_ERROR) {
301            locked = true;
302            break;
303        }
304        usleep(kDumpLockSleep);
305    }
306    return locked;
307}
308
309status_t AudioFlinger::dump(int fd, const Vector<String16>& args)
310{
311    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
312        dumpPermissionDenial(fd, args);
313    } else {
314        // get state of hardware lock
315        bool hardwareLocked = tryLock(mHardwareLock);
316        if (!hardwareLocked) {
317            String8 result(kHardwareLockedString);
318            write(fd, result.string(), result.size());
319        } else {
320            mHardwareLock.unlock();
321        }
322
323        bool locked = tryLock(mLock);
324
325        // failed to lock - AudioFlinger is probably deadlocked
326        if (!locked) {
327            String8 result(kDeadlockedString);
328            write(fd, result.string(), result.size());
329        }
330
331        dumpClients(fd, args);
332        dumpInternals(fd, args);
333
334        // dump playback threads
335        for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
336            mPlaybackThreads.valueAt(i)->dump(fd, args);
337        }
338
339        // dump record threads
340        for (size_t i = 0; i < mRecordThreads.size(); i++) {
341            mRecordThreads.valueAt(i)->dump(fd, args);
342        }
343
344        // dump all hardware devs
345        for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
346            audio_hw_device_t *dev = mAudioHwDevs[i];
347            dev->dump(dev, fd);
348        }
349        if (locked) mLock.unlock();
350    }
351    return NO_ERROR;
352}
353
354
355// IAudioFlinger interface
356
357
358sp<IAudioTrack> AudioFlinger::createTrack(
359        pid_t pid,
360        int streamType,
361        uint32_t sampleRate,
362        uint32_t format,
363        uint32_t channelMask,
364        int frameCount,
365        uint32_t flags,
366        const sp<IMemory>& sharedBuffer,
367        int output,
368        int *sessionId,
369        status_t *status)
370{
371    sp<PlaybackThread::Track> track;
372    sp<TrackHandle> trackHandle;
373    sp<Client> client;
374    wp<Client> wclient;
375    status_t lStatus;
376    int lSessionId;
377
378    if (streamType >= AUDIO_STREAM_CNT) {
379        LOGE("invalid stream type");
380        lStatus = BAD_VALUE;
381        goto Exit;
382    }
383
384    {
385        Mutex::Autolock _l(mLock);
386        PlaybackThread *thread = checkPlaybackThread_l(output);
387        PlaybackThread *effectThread = NULL;
388        if (thread == NULL) {
389            LOGE("unknown output thread");
390            lStatus = BAD_VALUE;
391            goto Exit;
392        }
393
394        wclient = mClients.valueFor(pid);
395
396        if (wclient != NULL) {
397            client = wclient.promote();
398        } else {
399            client = new Client(this, pid);
400            mClients.add(pid, client);
401        }
402
403        LOGV("createTrack() sessionId: %d", (sessionId == NULL) ? -2 : *sessionId);
404        if (sessionId != NULL && *sessionId != AUDIO_SESSION_OUTPUT_MIX) {
405            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
406                sp<PlaybackThread> t = mPlaybackThreads.valueAt(i);
407                if (mPlaybackThreads.keyAt(i) != output) {
408                    // prevent same audio session on different output threads
409                    uint32_t sessions = t->hasAudioSession(*sessionId);
410                    if (sessions & PlaybackThread::TRACK_SESSION) {
411                        lStatus = BAD_VALUE;
412                        goto Exit;
413                    }
414                    // check if an effect with same session ID is waiting for a track to be created
415                    if (sessions & PlaybackThread::EFFECT_SESSION) {
416                        effectThread = t.get();
417                    }
418                }
419            }
420            lSessionId = *sessionId;
421        } else {
422            // if no audio session id is provided, create one here
423            lSessionId = nextUniqueId();
424            if (sessionId != NULL) {
425                *sessionId = lSessionId;
426            }
427        }
428        LOGV("createTrack() lSessionId: %d", lSessionId);
429
430        track = thread->createTrack_l(client, streamType, sampleRate, format,
431                channelMask, frameCount, sharedBuffer, lSessionId, &lStatus);
432
433        // move effect chain to this output thread if an effect on same session was waiting
434        // for a track to be created
435        if (lStatus == NO_ERROR && effectThread != NULL) {
436            Mutex::Autolock _dl(thread->mLock);
437            Mutex::Autolock _sl(effectThread->mLock);
438            moveEffectChain_l(lSessionId, effectThread, thread, true);
439        }
440    }
441    if (lStatus == NO_ERROR) {
442        trackHandle = new TrackHandle(track);
443    } else {
444        // remove local strong reference to Client before deleting the Track so that the Client
445        // destructor is called by the TrackBase destructor with mLock held
446        client.clear();
447        track.clear();
448    }
449
450Exit:
451    if(status) {
452        *status = lStatus;
453    }
454    return trackHandle;
455}
456
457uint32_t AudioFlinger::sampleRate(int output) const
458{
459    Mutex::Autolock _l(mLock);
460    PlaybackThread *thread = checkPlaybackThread_l(output);
461    if (thread == NULL) {
462        LOGW("sampleRate() unknown thread %d", output);
463        return 0;
464    }
465    return thread->sampleRate();
466}
467
468int AudioFlinger::channelCount(int output) const
469{
470    Mutex::Autolock _l(mLock);
471    PlaybackThread *thread = checkPlaybackThread_l(output);
472    if (thread == NULL) {
473        LOGW("channelCount() unknown thread %d", output);
474        return 0;
475    }
476    return thread->channelCount();
477}
478
479uint32_t AudioFlinger::format(int output) const
480{
481    Mutex::Autolock _l(mLock);
482    PlaybackThread *thread = checkPlaybackThread_l(output);
483    if (thread == NULL) {
484        LOGW("format() unknown thread %d", output);
485        return 0;
486    }
487    return thread->format();
488}
489
490size_t AudioFlinger::frameCount(int output) const
491{
492    Mutex::Autolock _l(mLock);
493    PlaybackThread *thread = checkPlaybackThread_l(output);
494    if (thread == NULL) {
495        LOGW("frameCount() unknown thread %d", output);
496        return 0;
497    }
498    return thread->frameCount();
499}
500
501uint32_t AudioFlinger::latency(int output) const
502{
503    Mutex::Autolock _l(mLock);
504    PlaybackThread *thread = checkPlaybackThread_l(output);
505    if (thread == NULL) {
506        LOGW("latency() unknown thread %d", output);
507        return 0;
508    }
509    return thread->latency();
510}
511
512status_t AudioFlinger::setMasterVolume(float value)
513{
514    // check calling permissions
515    if (!settingsAllowed()) {
516        return PERMISSION_DENIED;
517    }
518
519    // when hw supports master volume, don't scale in sw mixer
520    { // scope for the lock
521        AutoMutex lock(mHardwareLock);
522        mHardwareStatus = AUDIO_HW_SET_MASTER_VOLUME;
523        if (mPrimaryHardwareDev->set_master_volume(mPrimaryHardwareDev, value) == NO_ERROR) {
524            value = 1.0f;
525        }
526        mHardwareStatus = AUDIO_HW_IDLE;
527    }
528
529    Mutex::Autolock _l(mLock);
530    mMasterVolume = value;
531    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
532       mPlaybackThreads.valueAt(i)->setMasterVolume(value);
533
534    return NO_ERROR;
535}
536
537status_t AudioFlinger::setMode(int mode)
538{
539    status_t ret;
540
541    // check calling permissions
542    if (!settingsAllowed()) {
543        return PERMISSION_DENIED;
544    }
545    if ((mode < 0) || (mode >= AUDIO_MODE_CNT)) {
546        LOGW("Illegal value: setMode(%d)", mode);
547        return BAD_VALUE;
548    }
549
550    { // scope for the lock
551        AutoMutex lock(mHardwareLock);
552        mHardwareStatus = AUDIO_HW_SET_MODE;
553        ret = mPrimaryHardwareDev->set_mode(mPrimaryHardwareDev, mode);
554        mHardwareStatus = AUDIO_HW_IDLE;
555    }
556
557    if (NO_ERROR == ret) {
558        Mutex::Autolock _l(mLock);
559        mMode = mode;
560        for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
561           mPlaybackThreads.valueAt(i)->setMode(mode);
562    }
563
564    return ret;
565}
566
567status_t AudioFlinger::setMicMute(bool state)
568{
569    // check calling permissions
570    if (!settingsAllowed()) {
571        return PERMISSION_DENIED;
572    }
573
574    AutoMutex lock(mHardwareLock);
575    mHardwareStatus = AUDIO_HW_SET_MIC_MUTE;
576    status_t ret = mPrimaryHardwareDev->set_mic_mute(mPrimaryHardwareDev, state);
577    mHardwareStatus = AUDIO_HW_IDLE;
578    return ret;
579}
580
581bool AudioFlinger::getMicMute() const
582{
583    bool state = AUDIO_MODE_INVALID;
584    mHardwareStatus = AUDIO_HW_GET_MIC_MUTE;
585    mPrimaryHardwareDev->get_mic_mute(mPrimaryHardwareDev, &state);
586    mHardwareStatus = AUDIO_HW_IDLE;
587    return state;
588}
589
590status_t AudioFlinger::setMasterMute(bool muted)
591{
592    // check calling permissions
593    if (!settingsAllowed()) {
594        return PERMISSION_DENIED;
595    }
596
597    Mutex::Autolock _l(mLock);
598    mMasterMute = muted;
599    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
600       mPlaybackThreads.valueAt(i)->setMasterMute(muted);
601
602    return NO_ERROR;
603}
604
605float AudioFlinger::masterVolume() const
606{
607    return mMasterVolume;
608}
609
610bool AudioFlinger::masterMute() const
611{
612    return mMasterMute;
613}
614
615status_t AudioFlinger::setStreamVolume(int stream, float value, int output)
616{
617    // check calling permissions
618    if (!settingsAllowed()) {
619        return PERMISSION_DENIED;
620    }
621
622    if (stream < 0 || uint32_t(stream) >= AUDIO_STREAM_CNT) {
623        return BAD_VALUE;
624    }
625
626    AutoMutex lock(mLock);
627    PlaybackThread *thread = NULL;
628    if (output) {
629        thread = checkPlaybackThread_l(output);
630        if (thread == NULL) {
631            return BAD_VALUE;
632        }
633    }
634
635    mStreamTypes[stream].volume = value;
636
637    if (thread == NULL) {
638        for (uint32_t i = 0; i < mPlaybackThreads.size(); i++) {
639           mPlaybackThreads.valueAt(i)->setStreamVolume(stream, value);
640        }
641    } else {
642        thread->setStreamVolume(stream, value);
643    }
644
645    return NO_ERROR;
646}
647
648status_t AudioFlinger::setStreamMute(int stream, bool muted)
649{
650    // check calling permissions
651    if (!settingsAllowed()) {
652        return PERMISSION_DENIED;
653    }
654
655    if (stream < 0 || uint32_t(stream) >= AUDIO_STREAM_CNT ||
656        uint32_t(stream) == AUDIO_STREAM_ENFORCED_AUDIBLE) {
657        return BAD_VALUE;
658    }
659
660    AutoMutex lock(mLock);
661    mStreamTypes[stream].mute = muted;
662    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
663       mPlaybackThreads.valueAt(i)->setStreamMute(stream, muted);
664
665    return NO_ERROR;
666}
667
668float AudioFlinger::streamVolume(int stream, int output) const
669{
670    if (stream < 0 || uint32_t(stream) >= AUDIO_STREAM_CNT) {
671        return 0.0f;
672    }
673
674    AutoMutex lock(mLock);
675    float volume;
676    if (output) {
677        PlaybackThread *thread = checkPlaybackThread_l(output);
678        if (thread == NULL) {
679            return 0.0f;
680        }
681        volume = thread->streamVolume(stream);
682    } else {
683        volume = mStreamTypes[stream].volume;
684    }
685
686    return volume;
687}
688
689bool AudioFlinger::streamMute(int stream) const
690{
691    if (stream < 0 || stream >= (int)AUDIO_STREAM_CNT) {
692        return true;
693    }
694
695    return mStreamTypes[stream].mute;
696}
697
698status_t AudioFlinger::setParameters(int ioHandle, const String8& keyValuePairs)
699{
700    status_t result;
701
702    LOGV("setParameters(): io %d, keyvalue %s, tid %d, calling tid %d",
703            ioHandle, keyValuePairs.string(), gettid(), IPCThreadState::self()->getCallingPid());
704    // check calling permissions
705    if (!settingsAllowed()) {
706        return PERMISSION_DENIED;
707    }
708
709    // ioHandle == 0 means the parameters are global to the audio hardware interface
710    if (ioHandle == 0) {
711        AutoMutex lock(mHardwareLock);
712        mHardwareStatus = AUDIO_SET_PARAMETER;
713        status_t final_result = NO_ERROR;
714        for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
715            audio_hw_device_t *dev = mAudioHwDevs[i];
716            result = dev->set_parameters(dev, keyValuePairs.string());
717            final_result = result ?: final_result;
718        }
719        mHardwareStatus = AUDIO_HW_IDLE;
720        return final_result;
721    }
722
723    // hold a strong ref on thread in case closeOutput() or closeInput() is called
724    // and the thread is exited once the lock is released
725    sp<ThreadBase> thread;
726    {
727        Mutex::Autolock _l(mLock);
728        thread = checkPlaybackThread_l(ioHandle);
729        if (thread == NULL) {
730            thread = checkRecordThread_l(ioHandle);
731        } else if (thread.get() == primaryPlaybackThread_l()) {
732            // indicate output device change to all input threads for pre processing
733            AudioParameter param = AudioParameter(keyValuePairs);
734            int value;
735            if (param.getInt(String8(AudioParameter::keyRouting), value) == NO_ERROR) {
736                for (size_t i = 0; i < mRecordThreads.size(); i++) {
737                    mRecordThreads.valueAt(i)->setParameters(keyValuePairs);
738                }
739            }
740        }
741    }
742    if (thread != NULL) {
743        result = thread->setParameters(keyValuePairs);
744        return result;
745    }
746    return BAD_VALUE;
747}
748
749String8 AudioFlinger::getParameters(int ioHandle, const String8& keys)
750{
751//    LOGV("getParameters() io %d, keys %s, tid %d, calling tid %d",
752//            ioHandle, keys.string(), gettid(), IPCThreadState::self()->getCallingPid());
753
754    if (ioHandle == 0) {
755        String8 out_s8;
756
757        for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
758            audio_hw_device_t *dev = mAudioHwDevs[i];
759            char *s = dev->get_parameters(dev, keys.string());
760            out_s8 += String8(s);
761            free(s);
762        }
763        return out_s8;
764    }
765
766    Mutex::Autolock _l(mLock);
767
768    PlaybackThread *playbackThread = checkPlaybackThread_l(ioHandle);
769    if (playbackThread != NULL) {
770        return playbackThread->getParameters(keys);
771    }
772    RecordThread *recordThread = checkRecordThread_l(ioHandle);
773    if (recordThread != NULL) {
774        return recordThread->getParameters(keys);
775    }
776    return String8("");
777}
778
779size_t AudioFlinger::getInputBufferSize(uint32_t sampleRate, int format, int channelCount)
780{
781    return mPrimaryHardwareDev->get_input_buffer_size(mPrimaryHardwareDev, sampleRate, format, channelCount);
782}
783
784unsigned int AudioFlinger::getInputFramesLost(int ioHandle)
785{
786    if (ioHandle == 0) {
787        return 0;
788    }
789
790    Mutex::Autolock _l(mLock);
791
792    RecordThread *recordThread = checkRecordThread_l(ioHandle);
793    if (recordThread != NULL) {
794        return recordThread->getInputFramesLost();
795    }
796    return 0;
797}
798
799status_t AudioFlinger::setVoiceVolume(float value)
800{
801    // check calling permissions
802    if (!settingsAllowed()) {
803        return PERMISSION_DENIED;
804    }
805
806    AutoMutex lock(mHardwareLock);
807    mHardwareStatus = AUDIO_SET_VOICE_VOLUME;
808    status_t ret = mPrimaryHardwareDev->set_voice_volume(mPrimaryHardwareDev, value);
809    mHardwareStatus = AUDIO_HW_IDLE;
810
811    return ret;
812}
813
814status_t AudioFlinger::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output)
815{
816    status_t status;
817
818    Mutex::Autolock _l(mLock);
819
820    PlaybackThread *playbackThread = checkPlaybackThread_l(output);
821    if (playbackThread != NULL) {
822        return playbackThread->getRenderPosition(halFrames, dspFrames);
823    }
824
825    return BAD_VALUE;
826}
827
828void AudioFlinger::registerClient(const sp<IAudioFlingerClient>& client)
829{
830
831    Mutex::Autolock _l(mLock);
832
833    int pid = IPCThreadState::self()->getCallingPid();
834    if (mNotificationClients.indexOfKey(pid) < 0) {
835        sp<NotificationClient> notificationClient = new NotificationClient(this,
836                                                                            client,
837                                                                            pid);
838        LOGV("registerClient() client %p, pid %d", notificationClient.get(), pid);
839
840        mNotificationClients.add(pid, notificationClient);
841
842        sp<IBinder> binder = client->asBinder();
843        binder->linkToDeath(notificationClient);
844
845        // the config change is always sent from playback or record threads to avoid deadlock
846        // with AudioSystem::gLock
847        for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
848            mPlaybackThreads.valueAt(i)->sendConfigEvent(AudioSystem::OUTPUT_OPENED);
849        }
850
851        for (size_t i = 0; i < mRecordThreads.size(); i++) {
852            mRecordThreads.valueAt(i)->sendConfigEvent(AudioSystem::INPUT_OPENED);
853        }
854    }
855}
856
857void AudioFlinger::removeNotificationClient(pid_t pid)
858{
859    Mutex::Autolock _l(mLock);
860
861    int index = mNotificationClients.indexOfKey(pid);
862    if (index >= 0) {
863        sp <NotificationClient> client = mNotificationClients.valueFor(pid);
864        LOGV("removeNotificationClient() %p, pid %d", client.get(), pid);
865        mNotificationClients.removeItem(pid);
866    }
867}
868
869// audioConfigChanged_l() must be called with AudioFlinger::mLock held
870void AudioFlinger::audioConfigChanged_l(int event, int ioHandle, void *param2)
871{
872    size_t size = mNotificationClients.size();
873    for (size_t i = 0; i < size; i++) {
874        mNotificationClients.valueAt(i)->client()->ioConfigChanged(event, ioHandle, param2);
875    }
876}
877
878// removeClient_l() must be called with AudioFlinger::mLock held
879void AudioFlinger::removeClient_l(pid_t pid)
880{
881    LOGV("removeClient_l() pid %d, tid %d, calling tid %d", pid, gettid(), IPCThreadState::self()->getCallingPid());
882    mClients.removeItem(pid);
883}
884
885
886// ----------------------------------------------------------------------------
887
888AudioFlinger::ThreadBase::ThreadBase(const sp<AudioFlinger>& audioFlinger, int id, uint32_t device)
889    :   Thread(false),
890        mAudioFlinger(audioFlinger), mSampleRate(0), mFrameCount(0), mChannelCount(0),
891        mFrameSize(1), mFormat(0), mStandby(false), mId(id), mExiting(false),
892        mDevice(device)
893{
894    mDeathRecipient = new PMDeathRecipient(this);
895}
896
897AudioFlinger::ThreadBase::~ThreadBase()
898{
899    mParamCond.broadcast();
900    mNewParameters.clear();
901    // do not lock the mutex in destructor
902    releaseWakeLock_l();
903}
904
905void AudioFlinger::ThreadBase::exit()
906{
907    // keep a strong ref on ourself so that we wont get
908    // destroyed in the middle of requestExitAndWait()
909    sp <ThreadBase> strongMe = this;
910
911    LOGV("ThreadBase::exit");
912    {
913        AutoMutex lock(&mLock);
914        mExiting = true;
915        requestExit();
916        mWaitWorkCV.signal();
917    }
918    requestExitAndWait();
919}
920
921uint32_t AudioFlinger::ThreadBase::sampleRate() const
922{
923    return mSampleRate;
924}
925
926int AudioFlinger::ThreadBase::channelCount() const
927{
928    return (int)mChannelCount;
929}
930
931uint32_t AudioFlinger::ThreadBase::format() const
932{
933    return mFormat;
934}
935
936size_t AudioFlinger::ThreadBase::frameCount() const
937{
938    return mFrameCount;
939}
940
941status_t AudioFlinger::ThreadBase::setParameters(const String8& keyValuePairs)
942{
943    status_t status;
944
945    LOGV("ThreadBase::setParameters() %s", keyValuePairs.string());
946    Mutex::Autolock _l(mLock);
947
948    mNewParameters.add(keyValuePairs);
949    mWaitWorkCV.signal();
950    // wait condition with timeout in case the thread loop has exited
951    // before the request could be processed
952    if (mParamCond.waitRelative(mLock, seconds(2)) == NO_ERROR) {
953        status = mParamStatus;
954        mWaitWorkCV.signal();
955    } else {
956        status = TIMED_OUT;
957    }
958    return status;
959}
960
961void AudioFlinger::ThreadBase::sendConfigEvent(int event, int param)
962{
963    Mutex::Autolock _l(mLock);
964    sendConfigEvent_l(event, param);
965}
966
967// sendConfigEvent_l() must be called with ThreadBase::mLock held
968void AudioFlinger::ThreadBase::sendConfigEvent_l(int event, int param)
969{
970    ConfigEvent *configEvent = new ConfigEvent();
971    configEvent->mEvent = event;
972    configEvent->mParam = param;
973    mConfigEvents.add(configEvent);
974    LOGV("sendConfigEvent() num events %d event %d, param %d", mConfigEvents.size(), event, param);
975    mWaitWorkCV.signal();
976}
977
978void AudioFlinger::ThreadBase::processConfigEvents()
979{
980    mLock.lock();
981    while(!mConfigEvents.isEmpty()) {
982        LOGV("processConfigEvents() remaining events %d", mConfigEvents.size());
983        ConfigEvent *configEvent = mConfigEvents[0];
984        mConfigEvents.removeAt(0);
985        // release mLock before locking AudioFlinger mLock: lock order is always
986        // AudioFlinger then ThreadBase to avoid cross deadlock
987        mLock.unlock();
988        mAudioFlinger->mLock.lock();
989        audioConfigChanged_l(configEvent->mEvent, configEvent->mParam);
990        mAudioFlinger->mLock.unlock();
991        delete configEvent;
992        mLock.lock();
993    }
994    mLock.unlock();
995}
996
997status_t AudioFlinger::ThreadBase::dumpBase(int fd, const Vector<String16>& args)
998{
999    const size_t SIZE = 256;
1000    char buffer[SIZE];
1001    String8 result;
1002
1003    bool locked = tryLock(mLock);
1004    if (!locked) {
1005        snprintf(buffer, SIZE, "thread %p maybe dead locked\n", this);
1006        write(fd, buffer, strlen(buffer));
1007    }
1008
1009    snprintf(buffer, SIZE, "standby: %d\n", mStandby);
1010    result.append(buffer);
1011    snprintf(buffer, SIZE, "Sample rate: %d\n", mSampleRate);
1012    result.append(buffer);
1013    snprintf(buffer, SIZE, "Frame count: %d\n", mFrameCount);
1014    result.append(buffer);
1015    snprintf(buffer, SIZE, "Channel Count: %d\n", mChannelCount);
1016    result.append(buffer);
1017    snprintf(buffer, SIZE, "Channel Mask: 0x%08x\n", mChannelMask);
1018    result.append(buffer);
1019    snprintf(buffer, SIZE, "Format: %d\n", mFormat);
1020    result.append(buffer);
1021    snprintf(buffer, SIZE, "Frame size: %d\n", mFrameSize);
1022    result.append(buffer);
1023
1024    snprintf(buffer, SIZE, "\nPending setParameters commands: \n");
1025    result.append(buffer);
1026    result.append(" Index Command");
1027    for (size_t i = 0; i < mNewParameters.size(); ++i) {
1028        snprintf(buffer, SIZE, "\n %02d    ", i);
1029        result.append(buffer);
1030        result.append(mNewParameters[i]);
1031    }
1032
1033    snprintf(buffer, SIZE, "\n\nPending config events: \n");
1034    result.append(buffer);
1035    snprintf(buffer, SIZE, " Index event param\n");
1036    result.append(buffer);
1037    for (size_t i = 0; i < mConfigEvents.size(); i++) {
1038        snprintf(buffer, SIZE, " %02d    %02d    %d\n", i, mConfigEvents[i]->mEvent, mConfigEvents[i]->mParam);
1039        result.append(buffer);
1040    }
1041    result.append("\n");
1042
1043    write(fd, result.string(), result.size());
1044
1045    if (locked) {
1046        mLock.unlock();
1047    }
1048    return NO_ERROR;
1049}
1050
1051status_t AudioFlinger::ThreadBase::dumpEffectChains(int fd, const Vector<String16>& args)
1052{
1053    const size_t SIZE = 256;
1054    char buffer[SIZE];
1055    String8 result;
1056
1057    snprintf(buffer, SIZE, "\n- %d Effect Chains:\n", mEffectChains.size());
1058    write(fd, buffer, strlen(buffer));
1059
1060    for (size_t i = 0; i < mEffectChains.size(); ++i) {
1061        sp<EffectChain> chain = mEffectChains[i];
1062        if (chain != 0) {
1063            chain->dump(fd, args);
1064        }
1065    }
1066    return NO_ERROR;
1067}
1068
1069void AudioFlinger::ThreadBase::acquireWakeLock()
1070{
1071    Mutex::Autolock _l(mLock);
1072    acquireWakeLock_l();
1073}
1074
1075void AudioFlinger::ThreadBase::acquireWakeLock_l()
1076{
1077    if (mPowerManager == 0) {
1078        // use checkService() to avoid blocking if power service is not up yet
1079        sp<IBinder> binder =
1080            defaultServiceManager()->checkService(String16("power"));
1081        if (binder == 0) {
1082            LOGW("Thread %s cannot connect to the power manager service", mName);
1083        } else {
1084            mPowerManager = interface_cast<IPowerManager>(binder);
1085            binder->linkToDeath(mDeathRecipient);
1086        }
1087    }
1088    if (mPowerManager != 0) {
1089        sp<IBinder> binder = new BBinder();
1090        status_t status = mPowerManager->acquireWakeLock(POWERMANAGER_PARTIAL_WAKE_LOCK,
1091                                                         binder,
1092                                                         String16(mName));
1093        if (status == NO_ERROR) {
1094            mWakeLockToken = binder;
1095        }
1096        LOGV("acquireWakeLock_l() %s status %d", mName, status);
1097    }
1098}
1099
1100void AudioFlinger::ThreadBase::releaseWakeLock()
1101{
1102    Mutex::Autolock _l(mLock);
1103    releaseWakeLock_l();
1104}
1105
1106void AudioFlinger::ThreadBase::releaseWakeLock_l()
1107{
1108    if (mWakeLockToken != 0) {
1109        LOGV("releaseWakeLock_l() %s", mName);
1110        if (mPowerManager != 0) {
1111            mPowerManager->releaseWakeLock(mWakeLockToken, 0);
1112        }
1113        mWakeLockToken.clear();
1114    }
1115}
1116
1117void AudioFlinger::ThreadBase::clearPowerManager()
1118{
1119    Mutex::Autolock _l(mLock);
1120    releaseWakeLock_l();
1121    mPowerManager.clear();
1122}
1123
1124void AudioFlinger::ThreadBase::PMDeathRecipient::binderDied(const wp<IBinder>& who)
1125{
1126    sp<ThreadBase> thread = mThread.promote();
1127    if (thread != 0) {
1128        thread->clearPowerManager();
1129    }
1130    LOGW("power manager service died !!!");
1131}
1132
1133void AudioFlinger::ThreadBase::setEffectSuspended(
1134        const effect_uuid_t *type, bool suspend, int sessionId)
1135{
1136    Mutex::Autolock _l(mLock);
1137    setEffectSuspended_l(type, suspend, sessionId);
1138}
1139
1140void AudioFlinger::ThreadBase::setEffectSuspended_l(
1141        const effect_uuid_t *type, bool suspend, int sessionId)
1142{
1143    sp<EffectChain> chain;
1144    chain = getEffectChain_l(sessionId);
1145    if (chain != 0) {
1146        if (type != NULL) {
1147            chain->setEffectSuspended_l(type, suspend);
1148        } else {
1149            chain->setEffectSuspendedAll_l(suspend);
1150        }
1151    }
1152
1153    updateSuspendedSessions_l(type, suspend, sessionId);
1154}
1155
1156void AudioFlinger::ThreadBase::checkSuspendOnAddEffectChain_l(const sp<EffectChain>& chain)
1157{
1158    int index = mSuspendedSessions.indexOfKey(chain->sessionId());
1159    if (index < 0) {
1160        return;
1161    }
1162
1163    KeyedVector <int, sp<SuspendedSessionDesc> > sessionEffects =
1164            mSuspendedSessions.editValueAt(index);
1165
1166    for (size_t i = 0; i < sessionEffects.size(); i++) {
1167        sp <SuspendedSessionDesc> desc = sessionEffects.valueAt(i);
1168        for (int j = 0; j < desc->mRefCount; j++) {
1169            if (sessionEffects.keyAt(i) == EffectChain::kKeyForSuspendAll) {
1170                chain->setEffectSuspendedAll_l(true);
1171            } else {
1172                LOGV("checkSuspendOnAddEffectChain_l() suspending effects %08x",
1173                     desc->mType.timeLow);
1174                chain->setEffectSuspended_l(&desc->mType, true);
1175            }
1176        }
1177    }
1178}
1179
1180void AudioFlinger::ThreadBase::updateSuspendedSessionsOnRemoveEffectChain_l(
1181        const sp<EffectChain>& chain)
1182{
1183    int index = mSuspendedSessions.indexOfKey(chain->sessionId());
1184    if (index < 0) {
1185        return;
1186    }
1187    LOGV("updateSuspendedSessionsOnRemoveEffectChain_l() removed suspended session %d",
1188         chain->sessionId());
1189    mSuspendedSessions.removeItemsAt(index);
1190}
1191
1192void AudioFlinger::ThreadBase::updateSuspendedSessions_l(const effect_uuid_t *type,
1193                                                         bool suspend,
1194                                                         int sessionId)
1195{
1196    int index = mSuspendedSessions.indexOfKey(sessionId);
1197
1198    KeyedVector <int, sp<SuspendedSessionDesc> > sessionEffects;
1199
1200    if (suspend) {
1201        if (index >= 0) {
1202            sessionEffects = mSuspendedSessions.editValueAt(index);
1203        } else {
1204            mSuspendedSessions.add(sessionId, sessionEffects);
1205        }
1206    } else {
1207        if (index < 0) {
1208            return;
1209        }
1210        sessionEffects = mSuspendedSessions.editValueAt(index);
1211    }
1212
1213
1214    int key = EffectChain::kKeyForSuspendAll;
1215    if (type != NULL) {
1216        key = type->timeLow;
1217    }
1218    index = sessionEffects.indexOfKey(key);
1219
1220    sp <SuspendedSessionDesc> desc;
1221    if (suspend) {
1222        if (index >= 0) {
1223            desc = sessionEffects.valueAt(index);
1224        } else {
1225            desc = new SuspendedSessionDesc();
1226            if (type != NULL) {
1227                memcpy(&desc->mType, type, sizeof(effect_uuid_t));
1228            }
1229            sessionEffects.add(key, desc);
1230            LOGV("updateSuspendedSessions_l() suspend adding effect %08x", key);
1231        }
1232        desc->mRefCount++;
1233    } else {
1234        if (index < 0) {
1235            return;
1236        }
1237        desc = sessionEffects.valueAt(index);
1238        if (--desc->mRefCount == 0) {
1239            LOGV("updateSuspendedSessions_l() restore removing effect %08x", key);
1240            sessionEffects.removeItemsAt(index);
1241            if (sessionEffects.isEmpty()) {
1242                LOGV("updateSuspendedSessions_l() restore removing session %d",
1243                                 sessionId);
1244                mSuspendedSessions.removeItem(sessionId);
1245            }
1246        }
1247    }
1248    if (!sessionEffects.isEmpty()) {
1249        mSuspendedSessions.replaceValueFor(sessionId, sessionEffects);
1250    }
1251}
1252
1253void AudioFlinger::ThreadBase::checkSuspendOnEffectEnabled(const sp<EffectModule>& effect,
1254                                                            bool enabled,
1255                                                            int sessionId)
1256{
1257    Mutex::Autolock _l(mLock);
1258
1259    // TODO: implement PlaybackThread or RecordThread specific behavior here
1260
1261    sp<EffectChain> chain = getEffectChain_l(sessionId);
1262    if (chain != 0) {
1263        chain->checkSuspendOnEffectEnabled(effect, enabled);
1264    }
1265}
1266
1267// ----------------------------------------------------------------------------
1268
1269AudioFlinger::PlaybackThread::PlaybackThread(const sp<AudioFlinger>& audioFlinger,
1270                                             AudioStreamOut* output,
1271                                             int id,
1272                                             uint32_t device)
1273    :   ThreadBase(audioFlinger, id, device),
1274        mMixBuffer(0), mSuspended(0), mBytesWritten(0), mOutput(output),
1275        mLastWriteTime(0), mNumWrites(0), mNumDelayedWrites(0), mInWrite(false)
1276{
1277    snprintf(mName, kNameLength, "AudioOut_%d", id);
1278
1279    readOutputParameters();
1280
1281    mMasterVolume = mAudioFlinger->masterVolume();
1282    mMasterMute = mAudioFlinger->masterMute();
1283
1284    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
1285        mStreamTypes[stream].volume = mAudioFlinger->streamVolumeInternal(stream);
1286        mStreamTypes[stream].mute = mAudioFlinger->streamMute(stream);
1287    }
1288}
1289
1290AudioFlinger::PlaybackThread::~PlaybackThread()
1291{
1292    delete [] mMixBuffer;
1293}
1294
1295status_t AudioFlinger::PlaybackThread::dump(int fd, const Vector<String16>& args)
1296{
1297    dumpInternals(fd, args);
1298    dumpTracks(fd, args);
1299    dumpEffectChains(fd, args);
1300    return NO_ERROR;
1301}
1302
1303status_t AudioFlinger::PlaybackThread::dumpTracks(int fd, const Vector<String16>& args)
1304{
1305    const size_t SIZE = 256;
1306    char buffer[SIZE];
1307    String8 result;
1308
1309    snprintf(buffer, SIZE, "Output thread %p tracks\n", this);
1310    result.append(buffer);
1311    result.append("   Name  Clien Typ Fmt Chn mask   Session Buf  S M F SRate LeftV RighV  Serv       User       Main buf   Aux Buf\n");
1312    for (size_t i = 0; i < mTracks.size(); ++i) {
1313        sp<Track> track = mTracks[i];
1314        if (track != 0) {
1315            track->dump(buffer, SIZE);
1316            result.append(buffer);
1317        }
1318    }
1319
1320    snprintf(buffer, SIZE, "Output thread %p active tracks\n", this);
1321    result.append(buffer);
1322    result.append("   Name  Clien Typ Fmt Chn mask   Session Buf  S M F SRate LeftV RighV  Serv       User       Main buf   Aux Buf\n");
1323    for (size_t i = 0; i < mActiveTracks.size(); ++i) {
1324        wp<Track> wTrack = mActiveTracks[i];
1325        if (wTrack != 0) {
1326            sp<Track> track = wTrack.promote();
1327            if (track != 0) {
1328                track->dump(buffer, SIZE);
1329                result.append(buffer);
1330            }
1331        }
1332    }
1333    write(fd, result.string(), result.size());
1334    return NO_ERROR;
1335}
1336
1337status_t AudioFlinger::PlaybackThread::dumpInternals(int fd, const Vector<String16>& args)
1338{
1339    const size_t SIZE = 256;
1340    char buffer[SIZE];
1341    String8 result;
1342
1343    snprintf(buffer, SIZE, "\nOutput thread %p internals\n", this);
1344    result.append(buffer);
1345    snprintf(buffer, SIZE, "last write occurred (msecs): %llu\n", ns2ms(systemTime() - mLastWriteTime));
1346    result.append(buffer);
1347    snprintf(buffer, SIZE, "total writes: %d\n", mNumWrites);
1348    result.append(buffer);
1349    snprintf(buffer, SIZE, "delayed writes: %d\n", mNumDelayedWrites);
1350    result.append(buffer);
1351    snprintf(buffer, SIZE, "blocked in write: %d\n", mInWrite);
1352    result.append(buffer);
1353    snprintf(buffer, SIZE, "suspend count: %d\n", mSuspended);
1354    result.append(buffer);
1355    snprintf(buffer, SIZE, "mix buffer : %p\n", mMixBuffer);
1356    result.append(buffer);
1357    write(fd, result.string(), result.size());
1358
1359    dumpBase(fd, args);
1360
1361    return NO_ERROR;
1362}
1363
1364// Thread virtuals
1365status_t AudioFlinger::PlaybackThread::readyToRun()
1366{
1367    if (mSampleRate == 0) {
1368        LOGE("No working audio driver found.");
1369        return NO_INIT;
1370    }
1371    LOGI("AudioFlinger's thread %p ready to run", this);
1372    return NO_ERROR;
1373}
1374
1375void AudioFlinger::PlaybackThread::onFirstRef()
1376{
1377    run(mName, ANDROID_PRIORITY_URGENT_AUDIO);
1378}
1379
1380// PlaybackThread::createTrack_l() must be called with AudioFlinger::mLock held
1381sp<AudioFlinger::PlaybackThread::Track>  AudioFlinger::PlaybackThread::createTrack_l(
1382        const sp<AudioFlinger::Client>& client,
1383        int streamType,
1384        uint32_t sampleRate,
1385        uint32_t format,
1386        uint32_t channelMask,
1387        int frameCount,
1388        const sp<IMemory>& sharedBuffer,
1389        int sessionId,
1390        status_t *status)
1391{
1392    sp<Track> track;
1393    status_t lStatus;
1394
1395    if (mType == DIRECT) {
1396        if ((format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_PCM) {
1397            if (sampleRate != mSampleRate || format != mFormat || channelMask != mChannelMask) {
1398                LOGE("createTrack_l() Bad parameter: sampleRate %d format %d, channelMask 0x%08x \""
1399                        "for output %p with format %d",
1400                        sampleRate, format, channelMask, mOutput, mFormat);
1401                lStatus = BAD_VALUE;
1402                goto Exit;
1403            }
1404        }
1405    } else {
1406        // Resampler implementation limits input sampling rate to 2 x output sampling rate.
1407        if (sampleRate > mSampleRate*2) {
1408            LOGE("Sample rate out of range: %d mSampleRate %d", sampleRate, mSampleRate);
1409            lStatus = BAD_VALUE;
1410            goto Exit;
1411        }
1412    }
1413
1414    lStatus = initCheck();
1415    if (lStatus != NO_ERROR) {
1416        LOGE("Audio driver not initialized.");
1417        goto Exit;
1418    }
1419
1420    { // scope for mLock
1421        Mutex::Autolock _l(mLock);
1422
1423        // all tracks in same audio session must share the same routing strategy otherwise
1424        // conflicts will happen when tracks are moved from one output to another by audio policy
1425        // manager
1426        uint32_t strategy =
1427                AudioSystem::getStrategyForStream((audio_stream_type_t)streamType);
1428        for (size_t i = 0; i < mTracks.size(); ++i) {
1429            sp<Track> t = mTracks[i];
1430            if (t != 0) {
1431                if (sessionId == t->sessionId() &&
1432                        strategy != AudioSystem::getStrategyForStream((audio_stream_type_t)t->type())) {
1433                    lStatus = BAD_VALUE;
1434                    goto Exit;
1435                }
1436            }
1437        }
1438
1439        track = new Track(this, client, streamType, sampleRate, format,
1440                channelMask, frameCount, sharedBuffer, sessionId);
1441        if (track->getCblk() == NULL || track->name() < 0) {
1442            lStatus = NO_MEMORY;
1443            goto Exit;
1444        }
1445        mTracks.add(track);
1446
1447        sp<EffectChain> chain = getEffectChain_l(sessionId);
1448        if (chain != 0) {
1449            LOGV("createTrack_l() setting main buffer %p", chain->inBuffer());
1450            track->setMainBuffer(chain->inBuffer());
1451            chain->setStrategy(AudioSystem::getStrategyForStream((audio_stream_type_t)track->type()));
1452            chain->incTrackCnt();
1453        }
1454    }
1455    lStatus = NO_ERROR;
1456
1457Exit:
1458    if(status) {
1459        *status = lStatus;
1460    }
1461    return track;
1462}
1463
1464uint32_t AudioFlinger::PlaybackThread::latency() const
1465{
1466    if (mOutput) {
1467        return mOutput->stream->get_latency(mOutput->stream);
1468    }
1469    else {
1470        return 0;
1471    }
1472}
1473
1474status_t AudioFlinger::PlaybackThread::setMasterVolume(float value)
1475{
1476    mMasterVolume = value;
1477    return NO_ERROR;
1478}
1479
1480status_t AudioFlinger::PlaybackThread::setMasterMute(bool muted)
1481{
1482    mMasterMute = muted;
1483    return NO_ERROR;
1484}
1485
1486float AudioFlinger::PlaybackThread::masterVolume() const
1487{
1488    return mMasterVolume;
1489}
1490
1491bool AudioFlinger::PlaybackThread::masterMute() const
1492{
1493    return mMasterMute;
1494}
1495
1496status_t AudioFlinger::PlaybackThread::setStreamVolume(int stream, float value)
1497{
1498    mStreamTypes[stream].volume = value;
1499    return NO_ERROR;
1500}
1501
1502status_t AudioFlinger::PlaybackThread::setStreamMute(int stream, bool muted)
1503{
1504    mStreamTypes[stream].mute = muted;
1505    return NO_ERROR;
1506}
1507
1508float AudioFlinger::PlaybackThread::streamVolume(int stream) const
1509{
1510    return mStreamTypes[stream].volume;
1511}
1512
1513bool AudioFlinger::PlaybackThread::streamMute(int stream) const
1514{
1515    return mStreamTypes[stream].mute;
1516}
1517
1518// addTrack_l() must be called with ThreadBase::mLock held
1519status_t AudioFlinger::PlaybackThread::addTrack_l(const sp<Track>& track)
1520{
1521    status_t status = ALREADY_EXISTS;
1522
1523    // set retry count for buffer fill
1524    track->mRetryCount = kMaxTrackStartupRetries;
1525    if (mActiveTracks.indexOf(track) < 0) {
1526        // the track is newly added, make sure it fills up all its
1527        // buffers before playing. This is to ensure the client will
1528        // effectively get the latency it requested.
1529        track->mFillingUpStatus = Track::FS_FILLING;
1530        track->mResetDone = false;
1531        mActiveTracks.add(track);
1532        if (track->mainBuffer() != mMixBuffer) {
1533            sp<EffectChain> chain = getEffectChain_l(track->sessionId());
1534            if (chain != 0) {
1535                LOGV("addTrack_l() starting track on chain %p for session %d", chain.get(), track->sessionId());
1536                chain->incActiveTrackCnt();
1537            }
1538        }
1539
1540        status = NO_ERROR;
1541    }
1542
1543    LOGV("mWaitWorkCV.broadcast");
1544    mWaitWorkCV.broadcast();
1545
1546    return status;
1547}
1548
1549// destroyTrack_l() must be called with ThreadBase::mLock held
1550void AudioFlinger::PlaybackThread::destroyTrack_l(const sp<Track>& track)
1551{
1552    track->mState = TrackBase::TERMINATED;
1553    if (mActiveTracks.indexOf(track) < 0) {
1554        removeTrack_l(track);
1555    }
1556}
1557
1558void AudioFlinger::PlaybackThread::removeTrack_l(const sp<Track>& track)
1559{
1560    mTracks.remove(track);
1561    deleteTrackName_l(track->name());
1562    sp<EffectChain> chain = getEffectChain_l(track->sessionId());
1563    if (chain != 0) {
1564        chain->decTrackCnt();
1565    }
1566}
1567
1568String8 AudioFlinger::PlaybackThread::getParameters(const String8& keys)
1569{
1570    String8 out_s8;
1571    char *s;
1572
1573    s = mOutput->stream->common.get_parameters(&mOutput->stream->common, keys.string());
1574    out_s8 = String8(s);
1575    free(s);
1576    return out_s8;
1577}
1578
1579// destroyTrack_l() must be called with AudioFlinger::mLock held
1580void AudioFlinger::PlaybackThread::audioConfigChanged_l(int event, int param) {
1581    AudioSystem::OutputDescriptor desc;
1582    void *param2 = 0;
1583
1584    LOGV("PlaybackThread::audioConfigChanged_l, thread %p, event %d, param %d", this, event, param);
1585
1586    switch (event) {
1587    case AudioSystem::OUTPUT_OPENED:
1588    case AudioSystem::OUTPUT_CONFIG_CHANGED:
1589        desc.channels = mChannelMask;
1590        desc.samplingRate = mSampleRate;
1591        desc.format = mFormat;
1592        desc.frameCount = mFrameCount;
1593        desc.latency = latency();
1594        param2 = &desc;
1595        break;
1596
1597    case AudioSystem::STREAM_CONFIG_CHANGED:
1598        param2 = &param;
1599    case AudioSystem::OUTPUT_CLOSED:
1600    default:
1601        break;
1602    }
1603    mAudioFlinger->audioConfigChanged_l(event, mId, param2);
1604}
1605
1606void AudioFlinger::PlaybackThread::readOutputParameters()
1607{
1608    mSampleRate = mOutput->stream->common.get_sample_rate(&mOutput->stream->common);
1609    mChannelMask = mOutput->stream->common.get_channels(&mOutput->stream->common);
1610    mChannelCount = (uint16_t)popcount(mChannelMask);
1611    mFormat = mOutput->stream->common.get_format(&mOutput->stream->common);
1612    mFrameSize = (uint16_t)audio_stream_frame_size(&mOutput->stream->common);
1613    mFrameCount = mOutput->stream->common.get_buffer_size(&mOutput->stream->common) / mFrameSize;
1614
1615    // FIXME - Current mixer implementation only supports stereo output: Always
1616    // Allocate a stereo buffer even if HW output is mono.
1617    if (mMixBuffer != NULL) delete[] mMixBuffer;
1618    mMixBuffer = new int16_t[mFrameCount * 2];
1619    memset(mMixBuffer, 0, mFrameCount * 2 * sizeof(int16_t));
1620
1621    // force reconfiguration of effect chains and engines to take new buffer size and audio
1622    // parameters into account
1623    // Note that mLock is not held when readOutputParameters() is called from the constructor
1624    // but in this case nothing is done below as no audio sessions have effect yet so it doesn't
1625    // matter.
1626    // create a copy of mEffectChains as calling moveEffectChain_l() can reorder some effect chains
1627    Vector< sp<EffectChain> > effectChains = mEffectChains;
1628    for (size_t i = 0; i < effectChains.size(); i ++) {
1629        mAudioFlinger->moveEffectChain_l(effectChains[i]->sessionId(), this, this, false);
1630    }
1631}
1632
1633status_t AudioFlinger::PlaybackThread::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames)
1634{
1635    if (halFrames == 0 || dspFrames == 0) {
1636        return BAD_VALUE;
1637    }
1638    if (initCheck() != NO_ERROR) {
1639        return INVALID_OPERATION;
1640    }
1641    *halFrames = mBytesWritten / audio_stream_frame_size(&mOutput->stream->common);
1642
1643    return mOutput->stream->get_render_position(mOutput->stream, dspFrames);
1644}
1645
1646uint32_t AudioFlinger::PlaybackThread::hasAudioSession(int sessionId)
1647{
1648    Mutex::Autolock _l(mLock);
1649    uint32_t result = 0;
1650    if (getEffectChain_l(sessionId) != 0) {
1651        result = EFFECT_SESSION;
1652    }
1653
1654    for (size_t i = 0; i < mTracks.size(); ++i) {
1655        sp<Track> track = mTracks[i];
1656        if (sessionId == track->sessionId() &&
1657                !(track->mCblk->flags & CBLK_INVALID_MSK)) {
1658            result |= TRACK_SESSION;
1659            break;
1660        }
1661    }
1662
1663    return result;
1664}
1665
1666uint32_t AudioFlinger::PlaybackThread::getStrategyForSession_l(int sessionId)
1667{
1668    // session AUDIO_SESSION_OUTPUT_MIX is placed in same strategy as MUSIC stream so that
1669    // it is moved to correct output by audio policy manager when A2DP is connected or disconnected
1670    if (sessionId == AUDIO_SESSION_OUTPUT_MIX) {
1671        return AudioSystem::getStrategyForStream(AUDIO_STREAM_MUSIC);
1672    }
1673    for (size_t i = 0; i < mTracks.size(); i++) {
1674        sp<Track> track = mTracks[i];
1675        if (sessionId == track->sessionId() &&
1676                !(track->mCblk->flags & CBLK_INVALID_MSK)) {
1677            return AudioSystem::getStrategyForStream((audio_stream_type_t) track->type());
1678        }
1679    }
1680    return AudioSystem::getStrategyForStream(AUDIO_STREAM_MUSIC);
1681}
1682
1683
1684// ----------------------------------------------------------------------------
1685
1686AudioFlinger::MixerThread::MixerThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
1687    :   PlaybackThread(audioFlinger, output, id, device),
1688        mAudioMixer(0)
1689{
1690    mType = ThreadBase::MIXER;
1691    mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
1692
1693    // FIXME - Current mixer implementation only supports stereo output
1694    if (mChannelCount == 1) {
1695        LOGE("Invalid audio hardware channel count");
1696    }
1697}
1698
1699AudioFlinger::MixerThread::~MixerThread()
1700{
1701    delete mAudioMixer;
1702}
1703
1704bool AudioFlinger::MixerThread::threadLoop()
1705{
1706    Vector< sp<Track> > tracksToRemove;
1707    uint32_t mixerStatus = MIXER_IDLE;
1708    nsecs_t standbyTime = systemTime();
1709    size_t mixBufferSize = mFrameCount * mFrameSize;
1710    // FIXME: Relaxed timing because of a certain device that can't meet latency
1711    // Should be reduced to 2x after the vendor fixes the driver issue
1712    nsecs_t maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
1713    nsecs_t lastWarning = 0;
1714    bool longStandbyExit = false;
1715    uint32_t activeSleepTime = activeSleepTimeUs();
1716    uint32_t idleSleepTime = idleSleepTimeUs();
1717    uint32_t sleepTime = idleSleepTime;
1718    Vector< sp<EffectChain> > effectChains;
1719#ifdef DEBUG_CPU_USAGE
1720    ThreadCpuUsage cpu;
1721    const CentralTendencyStatistics& stats = cpu.statistics();
1722#endif
1723
1724    acquireWakeLock();
1725
1726    while (!exitPending())
1727    {
1728#ifdef DEBUG_CPU_USAGE
1729        cpu.sampleAndEnable();
1730        unsigned n = stats.n();
1731        // cpu.elapsed() is expensive, so don't call it every loop
1732        if ((n & 127) == 1) {
1733            long long elapsed = cpu.elapsed();
1734            if (elapsed >= DEBUG_CPU_USAGE * 1000000000LL) {
1735                double perLoop = elapsed / (double) n;
1736                double perLoop100 = perLoop * 0.01;
1737                double mean = stats.mean();
1738                double stddev = stats.stddev();
1739                double minimum = stats.minimum();
1740                double maximum = stats.maximum();
1741                cpu.resetStatistics();
1742                LOGI("CPU usage over past %.1f secs (%u mixer loops at %.1f mean ms per loop):\n  us per mix loop: mean=%.0f stddev=%.0f min=%.0f max=%.0f\n  %% of wall: mean=%.1f stddev=%.1f min=%.1f max=%.1f",
1743                        elapsed * .000000001, n, perLoop * .000001,
1744                        mean * .001,
1745                        stddev * .001,
1746                        minimum * .001,
1747                        maximum * .001,
1748                        mean / perLoop100,
1749                        stddev / perLoop100,
1750                        minimum / perLoop100,
1751                        maximum / perLoop100);
1752            }
1753        }
1754#endif
1755        processConfigEvents();
1756
1757        mixerStatus = MIXER_IDLE;
1758        { // scope for mLock
1759
1760            Mutex::Autolock _l(mLock);
1761
1762            if (checkForNewParameters_l()) {
1763                mixBufferSize = mFrameCount * mFrameSize;
1764                // FIXME: Relaxed timing because of a certain device that can't meet latency
1765                // Should be reduced to 2x after the vendor fixes the driver issue
1766                maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
1767                activeSleepTime = activeSleepTimeUs();
1768                idleSleepTime = idleSleepTimeUs();
1769            }
1770
1771            const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
1772
1773            // put audio hardware into standby after short delay
1774            if UNLIKELY((!activeTracks.size() && systemTime() > standbyTime) ||
1775                        mSuspended) {
1776                if (!mStandby) {
1777                    LOGV("Audio hardware entering standby, mixer %p, mSuspended %d\n", this, mSuspended);
1778                    mOutput->stream->common.standby(&mOutput->stream->common);
1779                    mStandby = true;
1780                    mBytesWritten = 0;
1781                }
1782
1783                if (!activeTracks.size() && mConfigEvents.isEmpty()) {
1784                    // we're about to wait, flush the binder command buffer
1785                    IPCThreadState::self()->flushCommands();
1786
1787                    if (exitPending()) break;
1788
1789                    releaseWakeLock_l();
1790                    // wait until we have something to do...
1791                    LOGV("MixerThread %p TID %d going to sleep\n", this, gettid());
1792                    mWaitWorkCV.wait(mLock);
1793                    LOGV("MixerThread %p TID %d waking up\n", this, gettid());
1794                    acquireWakeLock_l();
1795
1796                    if (mMasterMute == false) {
1797                        char value[PROPERTY_VALUE_MAX];
1798                        property_get("ro.audio.silent", value, "0");
1799                        if (atoi(value)) {
1800                            LOGD("Silence is golden");
1801                            setMasterMute(true);
1802                        }
1803                    }
1804
1805                    standbyTime = systemTime() + kStandbyTimeInNsecs;
1806                    sleepTime = idleSleepTime;
1807                    continue;
1808                }
1809            }
1810
1811            mixerStatus = prepareTracks_l(activeTracks, &tracksToRemove);
1812
1813            // prevent any changes in effect chain list and in each effect chain
1814            // during mixing and effect process as the audio buffers could be deleted
1815            // or modified if an effect is created or deleted
1816            lockEffectChains_l(effectChains);
1817       }
1818
1819        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
1820            // mix buffers...
1821            mAudioMixer->process();
1822            sleepTime = 0;
1823            standbyTime = systemTime() + kStandbyTimeInNsecs;
1824            //TODO: delay standby when effects have a tail
1825        } else {
1826            // If no tracks are ready, sleep once for the duration of an output
1827            // buffer size, then write 0s to the output
1828            if (sleepTime == 0) {
1829                if (mixerStatus == MIXER_TRACKS_ENABLED) {
1830                    sleepTime = activeSleepTime;
1831                } else {
1832                    sleepTime = idleSleepTime;
1833                }
1834            } else if (mBytesWritten != 0 ||
1835                       (mixerStatus == MIXER_TRACKS_ENABLED && longStandbyExit)) {
1836                memset (mMixBuffer, 0, mixBufferSize);
1837                sleepTime = 0;
1838                LOGV_IF((mBytesWritten == 0 && (mixerStatus == MIXER_TRACKS_ENABLED && longStandbyExit)), "anticipated start");
1839            }
1840            // TODO add standby time extension fct of effect tail
1841        }
1842
1843        if (mSuspended) {
1844            sleepTime = suspendSleepTimeUs();
1845        }
1846        // sleepTime == 0 means we must write to audio hardware
1847        if (sleepTime == 0) {
1848             for (size_t i = 0; i < effectChains.size(); i ++) {
1849                 effectChains[i]->process_l();
1850             }
1851             // enable changes in effect chain
1852             unlockEffectChains(effectChains);
1853            mLastWriteTime = systemTime();
1854            mInWrite = true;
1855            mBytesWritten += mixBufferSize;
1856
1857            int bytesWritten = (int)mOutput->stream->write(mOutput->stream, mMixBuffer, mixBufferSize);
1858            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
1859            mNumWrites++;
1860            mInWrite = false;
1861            nsecs_t now = systemTime();
1862            nsecs_t delta = now - mLastWriteTime;
1863            if (delta > maxPeriod) {
1864                mNumDelayedWrites++;
1865                if ((now - lastWarning) > kWarningThrottle) {
1866                    LOGW("write blocked for %llu msecs, %d delayed writes, thread %p",
1867                            ns2ms(delta), mNumDelayedWrites, this);
1868                    lastWarning = now;
1869                }
1870                if (mStandby) {
1871                    longStandbyExit = true;
1872                }
1873            }
1874            mStandby = false;
1875        } else {
1876            // enable changes in effect chain
1877            unlockEffectChains(effectChains);
1878            usleep(sleepTime);
1879        }
1880
1881        // finally let go of all our tracks, without the lock held
1882        // since we can't guarantee the destructors won't acquire that
1883        // same lock.
1884        tracksToRemove.clear();
1885
1886        // Effect chains will be actually deleted here if they were removed from
1887        // mEffectChains list during mixing or effects processing
1888        effectChains.clear();
1889    }
1890
1891    if (!mStandby) {
1892        mOutput->stream->common.standby(&mOutput->stream->common);
1893    }
1894
1895    releaseWakeLock();
1896
1897    LOGV("MixerThread %p exiting", this);
1898    return false;
1899}
1900
1901// prepareTracks_l() must be called with ThreadBase::mLock held
1902uint32_t AudioFlinger::MixerThread::prepareTracks_l(const SortedVector< wp<Track> >& activeTracks, Vector< sp<Track> > *tracksToRemove)
1903{
1904
1905    uint32_t mixerStatus = MIXER_IDLE;
1906    // find out which tracks need to be processed
1907    size_t count = activeTracks.size();
1908    size_t mixedTracks = 0;
1909    size_t tracksWithEffect = 0;
1910
1911    float masterVolume = mMasterVolume;
1912    bool  masterMute = mMasterMute;
1913
1914    if (masterMute) {
1915        masterVolume = 0;
1916    }
1917    // Delegate master volume control to effect in output mix effect chain if needed
1918    sp<EffectChain> chain = getEffectChain_l(AUDIO_SESSION_OUTPUT_MIX);
1919    if (chain != 0) {
1920        uint32_t v = (uint32_t)(masterVolume * (1 << 24));
1921        chain->setVolume_l(&v, &v);
1922        masterVolume = (float)((v + (1 << 23)) >> 24);
1923        chain.clear();
1924    }
1925
1926    for (size_t i=0 ; i<count ; i++) {
1927        sp<Track> t = activeTracks[i].promote();
1928        if (t == 0) continue;
1929
1930        Track* const track = t.get();
1931        audio_track_cblk_t* cblk = track->cblk();
1932
1933        // The first time a track is added we wait
1934        // for all its buffers to be filled before processing it
1935        mAudioMixer->setActiveTrack(track->name());
1936        if (cblk->framesReady() && track->isReady() &&
1937                !track->isPaused() && !track->isTerminated())
1938        {
1939            //LOGV("track %d u=%08x, s=%08x [OK] on thread %p", track->name(), cblk->user, cblk->server, this);
1940
1941            mixedTracks++;
1942
1943            // track->mainBuffer() != mMixBuffer means there is an effect chain
1944            // connected to the track
1945            chain.clear();
1946            if (track->mainBuffer() != mMixBuffer) {
1947                chain = getEffectChain_l(track->sessionId());
1948                // Delegate volume control to effect in track effect chain if needed
1949                if (chain != 0) {
1950                    tracksWithEffect++;
1951                } else {
1952                    LOGW("prepareTracks_l(): track %08x attached to effect but no chain found on session %d",
1953                            track->name(), track->sessionId());
1954                }
1955            }
1956
1957
1958            int param = AudioMixer::VOLUME;
1959            if (track->mFillingUpStatus == Track::FS_FILLED) {
1960                // no ramp for the first volume setting
1961                track->mFillingUpStatus = Track::FS_ACTIVE;
1962                if (track->mState == TrackBase::RESUMING) {
1963                    track->mState = TrackBase::ACTIVE;
1964                    param = AudioMixer::RAMP_VOLUME;
1965                }
1966                mAudioMixer->setParameter(AudioMixer::RESAMPLE, AudioMixer::RESET, NULL);
1967            } else if (cblk->server != 0) {
1968                // If the track is stopped before the first frame was mixed,
1969                // do not apply ramp
1970                param = AudioMixer::RAMP_VOLUME;
1971            }
1972
1973            // compute volume for this track
1974            uint32_t vl, vr, va;
1975            if (track->isMuted() || track->isPausing() ||
1976                mStreamTypes[track->type()].mute) {
1977                vl = vr = va = 0;
1978                if (track->isPausing()) {
1979                    track->setPaused();
1980                }
1981            } else {
1982
1983                // read original volumes with volume control
1984                float typeVolume = mStreamTypes[track->type()].volume;
1985                float v = masterVolume * typeVolume;
1986                vl = (uint32_t)(v * cblk->volume[0]) << 12;
1987                vr = (uint32_t)(v * cblk->volume[1]) << 12;
1988
1989                va = (uint32_t)(v * cblk->sendLevel);
1990            }
1991            // Delegate volume control to effect in track effect chain if needed
1992            if (chain != 0 && chain->setVolume_l(&vl, &vr)) {
1993                // Do not ramp volume if volume is controlled by effect
1994                param = AudioMixer::VOLUME;
1995                track->mHasVolumeController = true;
1996            } else {
1997                // force no volume ramp when volume controller was just disabled or removed
1998                // from effect chain to avoid volume spike
1999                if (track->mHasVolumeController) {
2000                    param = AudioMixer::VOLUME;
2001                }
2002                track->mHasVolumeController = false;
2003            }
2004
2005            // Convert volumes from 8.24 to 4.12 format
2006            int16_t left, right, aux;
2007            uint32_t v_clamped = (vl + (1 << 11)) >> 12;
2008            if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2009            left = int16_t(v_clamped);
2010            v_clamped = (vr + (1 << 11)) >> 12;
2011            if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2012            right = int16_t(v_clamped);
2013
2014            if (va > MAX_GAIN_INT) va = MAX_GAIN_INT;
2015            aux = int16_t(va);
2016
2017            // XXX: these things DON'T need to be done each time
2018            mAudioMixer->setBufferProvider(track);
2019            mAudioMixer->enable(AudioMixer::MIXING);
2020
2021            mAudioMixer->setParameter(param, AudioMixer::VOLUME0, (void *)left);
2022            mAudioMixer->setParameter(param, AudioMixer::VOLUME1, (void *)right);
2023            mAudioMixer->setParameter(param, AudioMixer::AUXLEVEL, (void *)aux);
2024            mAudioMixer->setParameter(
2025                AudioMixer::TRACK,
2026                AudioMixer::FORMAT, (void *)track->format());
2027            mAudioMixer->setParameter(
2028                AudioMixer::TRACK,
2029                AudioMixer::CHANNEL_MASK, (void *)track->channelMask());
2030            mAudioMixer->setParameter(
2031                AudioMixer::RESAMPLE,
2032                AudioMixer::SAMPLE_RATE,
2033                (void *)(cblk->sampleRate));
2034            mAudioMixer->setParameter(
2035                AudioMixer::TRACK,
2036                AudioMixer::MAIN_BUFFER, (void *)track->mainBuffer());
2037            mAudioMixer->setParameter(
2038                AudioMixer::TRACK,
2039                AudioMixer::AUX_BUFFER, (void *)track->auxBuffer());
2040
2041            // reset retry count
2042            track->mRetryCount = kMaxTrackRetries;
2043            mixerStatus = MIXER_TRACKS_READY;
2044        } else {
2045            //LOGV("track %d u=%08x, s=%08x [NOT READY] on thread %p", track->name(), cblk->user, cblk->server, this);
2046            if (track->isStopped()) {
2047                track->reset();
2048            }
2049            if (track->isTerminated() || track->isStopped() || track->isPaused()) {
2050                // We have consumed all the buffers of this track.
2051                // Remove it from the list of active tracks.
2052                tracksToRemove->add(track);
2053            } else {
2054                // No buffers for this track. Give it a few chances to
2055                // fill a buffer, then remove it from active list.
2056                if (--(track->mRetryCount) <= 0) {
2057                    LOGV("BUFFER TIMEOUT: remove(%d) from active list on thread %p", track->name(), this);
2058                    tracksToRemove->add(track);
2059                    // indicate to client process that the track was disabled because of underrun
2060                    android_atomic_or(CBLK_DISABLED_ON, &cblk->flags);
2061                } else if (mixerStatus != MIXER_TRACKS_READY) {
2062                    mixerStatus = MIXER_TRACKS_ENABLED;
2063                }
2064            }
2065            mAudioMixer->disable(AudioMixer::MIXING);
2066        }
2067    }
2068
2069    // remove all the tracks that need to be...
2070    count = tracksToRemove->size();
2071    if (UNLIKELY(count)) {
2072        for (size_t i=0 ; i<count ; i++) {
2073            const sp<Track>& track = tracksToRemove->itemAt(i);
2074            mActiveTracks.remove(track);
2075            if (track->mainBuffer() != mMixBuffer) {
2076                chain = getEffectChain_l(track->sessionId());
2077                if (chain != 0) {
2078                    LOGV("stopping track on chain %p for session Id: %d", chain.get(), track->sessionId());
2079                    chain->decActiveTrackCnt();
2080                }
2081            }
2082            if (track->isTerminated()) {
2083                removeTrack_l(track);
2084            }
2085        }
2086    }
2087
2088    // mix buffer must be cleared if all tracks are connected to an
2089    // effect chain as in this case the mixer will not write to
2090    // mix buffer and track effects will accumulate into it
2091    if (mixedTracks != 0 && mixedTracks == tracksWithEffect) {
2092        memset(mMixBuffer, 0, mFrameCount * mChannelCount * sizeof(int16_t));
2093    }
2094
2095    return mixerStatus;
2096}
2097
2098void AudioFlinger::MixerThread::invalidateTracks(int streamType)
2099{
2100    LOGV ("MixerThread::invalidateTracks() mixer %p, streamType %d, mTracks.size %d",
2101            this,  streamType, mTracks.size());
2102    Mutex::Autolock _l(mLock);
2103
2104    size_t size = mTracks.size();
2105    for (size_t i = 0; i < size; i++) {
2106        sp<Track> t = mTracks[i];
2107        if (t->type() == streamType) {
2108            android_atomic_or(CBLK_INVALID_ON, &t->mCblk->flags);
2109            t->mCblk->cv.signal();
2110        }
2111    }
2112}
2113
2114
2115// getTrackName_l() must be called with ThreadBase::mLock held
2116int AudioFlinger::MixerThread::getTrackName_l()
2117{
2118    return mAudioMixer->getTrackName();
2119}
2120
2121// deleteTrackName_l() must be called with ThreadBase::mLock held
2122void AudioFlinger::MixerThread::deleteTrackName_l(int name)
2123{
2124    LOGV("remove track (%d) and delete from mixer", name);
2125    mAudioMixer->deleteTrackName(name);
2126}
2127
2128// checkForNewParameters_l() must be called with ThreadBase::mLock held
2129bool AudioFlinger::MixerThread::checkForNewParameters_l()
2130{
2131    bool reconfig = false;
2132
2133    while (!mNewParameters.isEmpty()) {
2134        status_t status = NO_ERROR;
2135        String8 keyValuePair = mNewParameters[0];
2136        AudioParameter param = AudioParameter(keyValuePair);
2137        int value;
2138
2139        if (param.getInt(String8(AudioParameter::keySamplingRate), value) == NO_ERROR) {
2140            reconfig = true;
2141        }
2142        if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
2143            if (value != AUDIO_FORMAT_PCM_16_BIT) {
2144                status = BAD_VALUE;
2145            } else {
2146                reconfig = true;
2147            }
2148        }
2149        if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
2150            if (value != AUDIO_CHANNEL_OUT_STEREO) {
2151                status = BAD_VALUE;
2152            } else {
2153                reconfig = true;
2154            }
2155        }
2156        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
2157            // do not accept frame count changes if tracks are open as the track buffer
2158            // size depends on frame count and correct behavior would not be garantied
2159            // if frame count is changed after track creation
2160            if (!mTracks.isEmpty()) {
2161                status = INVALID_OPERATION;
2162            } else {
2163                reconfig = true;
2164            }
2165        }
2166        if (param.getInt(String8(AudioParameter::keyRouting), value) == NO_ERROR) {
2167            // when changing the audio output device, call addBatteryData to notify
2168            // the change
2169            if ((int)mDevice != value) {
2170                uint32_t params = 0;
2171                // check whether speaker is on
2172                if (value & AUDIO_DEVICE_OUT_SPEAKER) {
2173                    params |= IMediaPlayerService::kBatteryDataSpeakerOn;
2174                }
2175
2176                int deviceWithoutSpeaker
2177                    = AUDIO_DEVICE_OUT_ALL & ~AUDIO_DEVICE_OUT_SPEAKER;
2178                // check if any other device (except speaker) is on
2179                if (value & deviceWithoutSpeaker ) {
2180                    params |= IMediaPlayerService::kBatteryDataOtherAudioDeviceOn;
2181                }
2182
2183                if (params != 0) {
2184                    addBatteryData(params);
2185                }
2186            }
2187
2188            // forward device change to effects that have requested to be
2189            // aware of attached audio device.
2190            mDevice = (uint32_t)value;
2191            for (size_t i = 0; i < mEffectChains.size(); i++) {
2192                mEffectChains[i]->setDevice_l(mDevice);
2193            }
2194        }
2195
2196        if (status == NO_ERROR) {
2197            status = mOutput->stream->common.set_parameters(&mOutput->stream->common,
2198                                                    keyValuePair.string());
2199            if (!mStandby && status == INVALID_OPERATION) {
2200               mOutput->stream->common.standby(&mOutput->stream->common);
2201               mStandby = true;
2202               mBytesWritten = 0;
2203               status = mOutput->stream->common.set_parameters(&mOutput->stream->common,
2204                                                       keyValuePair.string());
2205            }
2206            if (status == NO_ERROR && reconfig) {
2207                delete mAudioMixer;
2208                readOutputParameters();
2209                mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
2210                for (size_t i = 0; i < mTracks.size() ; i++) {
2211                    int name = getTrackName_l();
2212                    if (name < 0) break;
2213                    mTracks[i]->mName = name;
2214                    // limit track sample rate to 2 x new output sample rate
2215                    if (mTracks[i]->mCblk->sampleRate > 2 * sampleRate()) {
2216                        mTracks[i]->mCblk->sampleRate = 2 * sampleRate();
2217                    }
2218                }
2219                sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
2220            }
2221        }
2222
2223        mNewParameters.removeAt(0);
2224
2225        mParamStatus = status;
2226        mParamCond.signal();
2227        mWaitWorkCV.wait(mLock);
2228    }
2229    return reconfig;
2230}
2231
2232status_t AudioFlinger::MixerThread::dumpInternals(int fd, const Vector<String16>& args)
2233{
2234    const size_t SIZE = 256;
2235    char buffer[SIZE];
2236    String8 result;
2237
2238    PlaybackThread::dumpInternals(fd, args);
2239
2240    snprintf(buffer, SIZE, "AudioMixer tracks: %08x\n", mAudioMixer->trackNames());
2241    result.append(buffer);
2242    write(fd, result.string(), result.size());
2243    return NO_ERROR;
2244}
2245
2246uint32_t AudioFlinger::MixerThread::activeSleepTimeUs()
2247{
2248    return (uint32_t)(mOutput->stream->get_latency(mOutput->stream) * 1000) / 2;
2249}
2250
2251uint32_t AudioFlinger::MixerThread::idleSleepTimeUs()
2252{
2253    return (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000) / 2;
2254}
2255
2256uint32_t AudioFlinger::MixerThread::suspendSleepTimeUs()
2257{
2258    return (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000);
2259}
2260
2261// ----------------------------------------------------------------------------
2262AudioFlinger::DirectOutputThread::DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
2263    :   PlaybackThread(audioFlinger, output, id, device)
2264{
2265    mType = ThreadBase::DIRECT;
2266}
2267
2268AudioFlinger::DirectOutputThread::~DirectOutputThread()
2269{
2270}
2271
2272
2273static inline int16_t clamp16(int32_t sample)
2274{
2275    if ((sample>>15) ^ (sample>>31))
2276        sample = 0x7FFF ^ (sample>>31);
2277    return sample;
2278}
2279
2280static inline
2281int32_t mul(int16_t in, int16_t v)
2282{
2283#if defined(__arm__) && !defined(__thumb__)
2284    int32_t out;
2285    asm( "smulbb %[out], %[in], %[v] \n"
2286         : [out]"=r"(out)
2287         : [in]"%r"(in), [v]"r"(v)
2288         : );
2289    return out;
2290#else
2291    return in * int32_t(v);
2292#endif
2293}
2294
2295void AudioFlinger::DirectOutputThread::applyVolume(uint16_t leftVol, uint16_t rightVol, bool ramp)
2296{
2297    // Do not apply volume on compressed audio
2298    if (!audio_is_linear_pcm(mFormat)) {
2299        return;
2300    }
2301
2302    // convert to signed 16 bit before volume calculation
2303    if (mFormat == AUDIO_FORMAT_PCM_8_BIT) {
2304        size_t count = mFrameCount * mChannelCount;
2305        uint8_t *src = (uint8_t *)mMixBuffer + count-1;
2306        int16_t *dst = mMixBuffer + count-1;
2307        while(count--) {
2308            *dst-- = (int16_t)(*src--^0x80) << 8;
2309        }
2310    }
2311
2312    size_t frameCount = mFrameCount;
2313    int16_t *out = mMixBuffer;
2314    if (ramp) {
2315        if (mChannelCount == 1) {
2316            int32_t d = ((int32_t)leftVol - (int32_t)mLeftVolShort) << 16;
2317            int32_t vlInc = d / (int32_t)frameCount;
2318            int32_t vl = ((int32_t)mLeftVolShort << 16);
2319            do {
2320                out[0] = clamp16(mul(out[0], vl >> 16) >> 12);
2321                out++;
2322                vl += vlInc;
2323            } while (--frameCount);
2324
2325        } else {
2326            int32_t d = ((int32_t)leftVol - (int32_t)mLeftVolShort) << 16;
2327            int32_t vlInc = d / (int32_t)frameCount;
2328            d = ((int32_t)rightVol - (int32_t)mRightVolShort) << 16;
2329            int32_t vrInc = d / (int32_t)frameCount;
2330            int32_t vl = ((int32_t)mLeftVolShort << 16);
2331            int32_t vr = ((int32_t)mRightVolShort << 16);
2332            do {
2333                out[0] = clamp16(mul(out[0], vl >> 16) >> 12);
2334                out[1] = clamp16(mul(out[1], vr >> 16) >> 12);
2335                out += 2;
2336                vl += vlInc;
2337                vr += vrInc;
2338            } while (--frameCount);
2339        }
2340    } else {
2341        if (mChannelCount == 1) {
2342            do {
2343                out[0] = clamp16(mul(out[0], leftVol) >> 12);
2344                out++;
2345            } while (--frameCount);
2346        } else {
2347            do {
2348                out[0] = clamp16(mul(out[0], leftVol) >> 12);
2349                out[1] = clamp16(mul(out[1], rightVol) >> 12);
2350                out += 2;
2351            } while (--frameCount);
2352        }
2353    }
2354
2355    // convert back to unsigned 8 bit after volume calculation
2356    if (mFormat == AUDIO_FORMAT_PCM_8_BIT) {
2357        size_t count = mFrameCount * mChannelCount;
2358        int16_t *src = mMixBuffer;
2359        uint8_t *dst = (uint8_t *)mMixBuffer;
2360        while(count--) {
2361            *dst++ = (uint8_t)(((int32_t)*src++ + (1<<7)) >> 8)^0x80;
2362        }
2363    }
2364
2365    mLeftVolShort = leftVol;
2366    mRightVolShort = rightVol;
2367}
2368
2369bool AudioFlinger::DirectOutputThread::threadLoop()
2370{
2371    uint32_t mixerStatus = MIXER_IDLE;
2372    sp<Track> trackToRemove;
2373    sp<Track> activeTrack;
2374    nsecs_t standbyTime = systemTime();
2375    int8_t *curBuf;
2376    size_t mixBufferSize = mFrameCount*mFrameSize;
2377    uint32_t activeSleepTime = activeSleepTimeUs();
2378    uint32_t idleSleepTime = idleSleepTimeUs();
2379    uint32_t sleepTime = idleSleepTime;
2380    // use shorter standby delay as on normal output to release
2381    // hardware resources as soon as possible
2382    nsecs_t standbyDelay = microseconds(activeSleepTime*2);
2383
2384    acquireWakeLock();
2385
2386    while (!exitPending())
2387    {
2388        bool rampVolume;
2389        uint16_t leftVol;
2390        uint16_t rightVol;
2391        Vector< sp<EffectChain> > effectChains;
2392
2393        processConfigEvents();
2394
2395        mixerStatus = MIXER_IDLE;
2396
2397        { // scope for the mLock
2398
2399            Mutex::Autolock _l(mLock);
2400
2401            if (checkForNewParameters_l()) {
2402                mixBufferSize = mFrameCount*mFrameSize;
2403                activeSleepTime = activeSleepTimeUs();
2404                idleSleepTime = idleSleepTimeUs();
2405                standbyDelay = microseconds(activeSleepTime*2);
2406            }
2407
2408            // put audio hardware into standby after short delay
2409            if UNLIKELY((!mActiveTracks.size() && systemTime() > standbyTime) ||
2410                        mSuspended) {
2411                // wait until we have something to do...
2412                if (!mStandby) {
2413                    LOGV("Audio hardware entering standby, mixer %p\n", this);
2414                    mOutput->stream->common.standby(&mOutput->stream->common);
2415                    mStandby = true;
2416                    mBytesWritten = 0;
2417                }
2418
2419                if (!mActiveTracks.size() && mConfigEvents.isEmpty()) {
2420                    // we're about to wait, flush the binder command buffer
2421                    IPCThreadState::self()->flushCommands();
2422
2423                    if (exitPending()) break;
2424
2425                    releaseWakeLock_l();
2426                    LOGV("DirectOutputThread %p TID %d going to sleep\n", this, gettid());
2427                    mWaitWorkCV.wait(mLock);
2428                    LOGV("DirectOutputThread %p TID %d waking up in active mode\n", this, gettid());
2429                    acquireWakeLock_l();
2430
2431                    if (mMasterMute == false) {
2432                        char value[PROPERTY_VALUE_MAX];
2433                        property_get("ro.audio.silent", value, "0");
2434                        if (atoi(value)) {
2435                            LOGD("Silence is golden");
2436                            setMasterMute(true);
2437                        }
2438                    }
2439
2440                    standbyTime = systemTime() + standbyDelay;
2441                    sleepTime = idleSleepTime;
2442                    continue;
2443                }
2444            }
2445
2446            effectChains = mEffectChains;
2447
2448            // find out which tracks need to be processed
2449            if (mActiveTracks.size() != 0) {
2450                sp<Track> t = mActiveTracks[0].promote();
2451                if (t == 0) continue;
2452
2453                Track* const track = t.get();
2454                audio_track_cblk_t* cblk = track->cblk();
2455
2456                // The first time a track is added we wait
2457                // for all its buffers to be filled before processing it
2458                if (cblk->framesReady() && track->isReady() &&
2459                        !track->isPaused() && !track->isTerminated())
2460                {
2461                    //LOGV("track %d u=%08x, s=%08x [OK]", track->name(), cblk->user, cblk->server);
2462
2463                    if (track->mFillingUpStatus == Track::FS_FILLED) {
2464                        track->mFillingUpStatus = Track::FS_ACTIVE;
2465                        mLeftVolFloat = mRightVolFloat = 0;
2466                        mLeftVolShort = mRightVolShort = 0;
2467                        if (track->mState == TrackBase::RESUMING) {
2468                            track->mState = TrackBase::ACTIVE;
2469                            rampVolume = true;
2470                        }
2471                    } else if (cblk->server != 0) {
2472                        // If the track is stopped before the first frame was mixed,
2473                        // do not apply ramp
2474                        rampVolume = true;
2475                    }
2476                    // compute volume for this track
2477                    float left, right;
2478                    if (track->isMuted() || mMasterMute || track->isPausing() ||
2479                        mStreamTypes[track->type()].mute) {
2480                        left = right = 0;
2481                        if (track->isPausing()) {
2482                            track->setPaused();
2483                        }
2484                    } else {
2485                        float typeVolume = mStreamTypes[track->type()].volume;
2486                        float v = mMasterVolume * typeVolume;
2487                        float v_clamped = v * cblk->volume[0];
2488                        if (v_clamped > MAX_GAIN) v_clamped = MAX_GAIN;
2489                        left = v_clamped/MAX_GAIN;
2490                        v_clamped = v * cblk->volume[1];
2491                        if (v_clamped > MAX_GAIN) v_clamped = MAX_GAIN;
2492                        right = v_clamped/MAX_GAIN;
2493                    }
2494
2495                    if (left != mLeftVolFloat || right != mRightVolFloat) {
2496                        mLeftVolFloat = left;
2497                        mRightVolFloat = right;
2498
2499                        // If audio HAL implements volume control,
2500                        // force software volume to nominal value
2501                        if (mOutput->stream->set_volume(mOutput->stream, left, right) == NO_ERROR) {
2502                            left = 1.0f;
2503                            right = 1.0f;
2504                        }
2505
2506                        // Convert volumes from float to 8.24
2507                        uint32_t vl = (uint32_t)(left * (1 << 24));
2508                        uint32_t vr = (uint32_t)(right * (1 << 24));
2509
2510                        // Delegate volume control to effect in track effect chain if needed
2511                        // only one effect chain can be present on DirectOutputThread, so if
2512                        // there is one, the track is connected to it
2513                        if (!effectChains.isEmpty()) {
2514                            // Do not ramp volume if volume is controlled by effect
2515                            if(effectChains[0]->setVolume_l(&vl, &vr)) {
2516                                rampVolume = false;
2517                            }
2518                        }
2519
2520                        // Convert volumes from 8.24 to 4.12 format
2521                        uint32_t v_clamped = (vl + (1 << 11)) >> 12;
2522                        if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2523                        leftVol = (uint16_t)v_clamped;
2524                        v_clamped = (vr + (1 << 11)) >> 12;
2525                        if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2526                        rightVol = (uint16_t)v_clamped;
2527                    } else {
2528                        leftVol = mLeftVolShort;
2529                        rightVol = mRightVolShort;
2530                        rampVolume = false;
2531                    }
2532
2533                    // reset retry count
2534                    track->mRetryCount = kMaxTrackRetriesDirect;
2535                    activeTrack = t;
2536                    mixerStatus = MIXER_TRACKS_READY;
2537                } else {
2538                    //LOGV("track %d u=%08x, s=%08x [NOT READY]", track->name(), cblk->user, cblk->server);
2539                    if (track->isStopped()) {
2540                        track->reset();
2541                    }
2542                    if (track->isTerminated() || track->isStopped() || track->isPaused()) {
2543                        // We have consumed all the buffers of this track.
2544                        // Remove it from the list of active tracks.
2545                        trackToRemove = track;
2546                    } else {
2547                        // No buffers for this track. Give it a few chances to
2548                        // fill a buffer, then remove it from active list.
2549                        if (--(track->mRetryCount) <= 0) {
2550                            LOGV("BUFFER TIMEOUT: remove(%d) from active list", track->name());
2551                            trackToRemove = track;
2552                        } else {
2553                            mixerStatus = MIXER_TRACKS_ENABLED;
2554                        }
2555                    }
2556                }
2557            }
2558
2559            // remove all the tracks that need to be...
2560            if (UNLIKELY(trackToRemove != 0)) {
2561                mActiveTracks.remove(trackToRemove);
2562                if (!effectChains.isEmpty()) {
2563                    LOGV("stopping track on chain %p for session Id: %d", effectChains[0].get(),
2564                            trackToRemove->sessionId());
2565                    effectChains[0]->decActiveTrackCnt();
2566                }
2567                if (trackToRemove->isTerminated()) {
2568                    removeTrack_l(trackToRemove);
2569                }
2570            }
2571
2572            lockEffectChains_l(effectChains);
2573       }
2574
2575        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
2576            AudioBufferProvider::Buffer buffer;
2577            size_t frameCount = mFrameCount;
2578            curBuf = (int8_t *)mMixBuffer;
2579            // output audio to hardware
2580            while (frameCount) {
2581                buffer.frameCount = frameCount;
2582                activeTrack->getNextBuffer(&buffer);
2583                if (UNLIKELY(buffer.raw == 0)) {
2584                    memset(curBuf, 0, frameCount * mFrameSize);
2585                    break;
2586                }
2587                memcpy(curBuf, buffer.raw, buffer.frameCount * mFrameSize);
2588                frameCount -= buffer.frameCount;
2589                curBuf += buffer.frameCount * mFrameSize;
2590                activeTrack->releaseBuffer(&buffer);
2591            }
2592            sleepTime = 0;
2593            standbyTime = systemTime() + standbyDelay;
2594        } else {
2595            if (sleepTime == 0) {
2596                if (mixerStatus == MIXER_TRACKS_ENABLED) {
2597                    sleepTime = activeSleepTime;
2598                } else {
2599                    sleepTime = idleSleepTime;
2600                }
2601            } else if (mBytesWritten != 0 && audio_is_linear_pcm(mFormat)) {
2602                memset (mMixBuffer, 0, mFrameCount * mFrameSize);
2603                sleepTime = 0;
2604            }
2605        }
2606
2607        if (mSuspended) {
2608            sleepTime = suspendSleepTimeUs();
2609        }
2610        // sleepTime == 0 means we must write to audio hardware
2611        if (sleepTime == 0) {
2612            if (mixerStatus == MIXER_TRACKS_READY) {
2613                applyVolume(leftVol, rightVol, rampVolume);
2614            }
2615            for (size_t i = 0; i < effectChains.size(); i ++) {
2616                effectChains[i]->process_l();
2617            }
2618            unlockEffectChains(effectChains);
2619
2620            mLastWriteTime = systemTime();
2621            mInWrite = true;
2622            mBytesWritten += mixBufferSize;
2623            int bytesWritten = (int)mOutput->stream->write(mOutput->stream, mMixBuffer, mixBufferSize);
2624            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
2625            mNumWrites++;
2626            mInWrite = false;
2627            mStandby = false;
2628        } else {
2629            unlockEffectChains(effectChains);
2630            usleep(sleepTime);
2631        }
2632
2633        // finally let go of removed track, without the lock held
2634        // since we can't guarantee the destructors won't acquire that
2635        // same lock.
2636        trackToRemove.clear();
2637        activeTrack.clear();
2638
2639        // Effect chains will be actually deleted here if they were removed from
2640        // mEffectChains list during mixing or effects processing
2641        effectChains.clear();
2642    }
2643
2644    if (!mStandby) {
2645        mOutput->stream->common.standby(&mOutput->stream->common);
2646    }
2647
2648    releaseWakeLock();
2649
2650    LOGV("DirectOutputThread %p exiting", this);
2651    return false;
2652}
2653
2654// getTrackName_l() must be called with ThreadBase::mLock held
2655int AudioFlinger::DirectOutputThread::getTrackName_l()
2656{
2657    return 0;
2658}
2659
2660// deleteTrackName_l() must be called with ThreadBase::mLock held
2661void AudioFlinger::DirectOutputThread::deleteTrackName_l(int name)
2662{
2663}
2664
2665// checkForNewParameters_l() must be called with ThreadBase::mLock held
2666bool AudioFlinger::DirectOutputThread::checkForNewParameters_l()
2667{
2668    bool reconfig = false;
2669
2670    while (!mNewParameters.isEmpty()) {
2671        status_t status = NO_ERROR;
2672        String8 keyValuePair = mNewParameters[0];
2673        AudioParameter param = AudioParameter(keyValuePair);
2674        int value;
2675
2676        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
2677            // do not accept frame count changes if tracks are open as the track buffer
2678            // size depends on frame count and correct behavior would not be garantied
2679            // if frame count is changed after track creation
2680            if (!mTracks.isEmpty()) {
2681                status = INVALID_OPERATION;
2682            } else {
2683                reconfig = true;
2684            }
2685        }
2686        if (status == NO_ERROR) {
2687            status = mOutput->stream->common.set_parameters(&mOutput->stream->common,
2688                                                    keyValuePair.string());
2689            if (!mStandby && status == INVALID_OPERATION) {
2690               mOutput->stream->common.standby(&mOutput->stream->common);
2691               mStandby = true;
2692               mBytesWritten = 0;
2693               status = mOutput->stream->common.set_parameters(&mOutput->stream->common,
2694                                                       keyValuePair.string());
2695            }
2696            if (status == NO_ERROR && reconfig) {
2697                readOutputParameters();
2698                sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
2699            }
2700        }
2701
2702        mNewParameters.removeAt(0);
2703
2704        mParamStatus = status;
2705        mParamCond.signal();
2706        mWaitWorkCV.wait(mLock);
2707    }
2708    return reconfig;
2709}
2710
2711uint32_t AudioFlinger::DirectOutputThread::activeSleepTimeUs()
2712{
2713    uint32_t time;
2714    if (audio_is_linear_pcm(mFormat)) {
2715        time = (uint32_t)(mOutput->stream->get_latency(mOutput->stream) * 1000) / 2;
2716    } else {
2717        time = 10000;
2718    }
2719    return time;
2720}
2721
2722uint32_t AudioFlinger::DirectOutputThread::idleSleepTimeUs()
2723{
2724    uint32_t time;
2725    if (audio_is_linear_pcm(mFormat)) {
2726        time = (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000) / 2;
2727    } else {
2728        time = 10000;
2729    }
2730    return time;
2731}
2732
2733uint32_t AudioFlinger::DirectOutputThread::suspendSleepTimeUs()
2734{
2735    uint32_t time;
2736    if (audio_is_linear_pcm(mFormat)) {
2737        time = (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000);
2738    } else {
2739        time = 10000;
2740    }
2741    return time;
2742}
2743
2744
2745// ----------------------------------------------------------------------------
2746
2747AudioFlinger::DuplicatingThread::DuplicatingThread(const sp<AudioFlinger>& audioFlinger, AudioFlinger::MixerThread* mainThread, int id)
2748    :   MixerThread(audioFlinger, mainThread->getOutput(), id, mainThread->device()), mWaitTimeMs(UINT_MAX)
2749{
2750    mType = ThreadBase::DUPLICATING;
2751    addOutputTrack(mainThread);
2752}
2753
2754AudioFlinger::DuplicatingThread::~DuplicatingThread()
2755{
2756    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2757        mOutputTracks[i]->destroy();
2758    }
2759    mOutputTracks.clear();
2760}
2761
2762bool AudioFlinger::DuplicatingThread::threadLoop()
2763{
2764    Vector< sp<Track> > tracksToRemove;
2765    uint32_t mixerStatus = MIXER_IDLE;
2766    nsecs_t standbyTime = systemTime();
2767    size_t mixBufferSize = mFrameCount*mFrameSize;
2768    SortedVector< sp<OutputTrack> > outputTracks;
2769    uint32_t writeFrames = 0;
2770    uint32_t activeSleepTime = activeSleepTimeUs();
2771    uint32_t idleSleepTime = idleSleepTimeUs();
2772    uint32_t sleepTime = idleSleepTime;
2773    Vector< sp<EffectChain> > effectChains;
2774
2775    acquireWakeLock();
2776
2777    while (!exitPending())
2778    {
2779        processConfigEvents();
2780
2781        mixerStatus = MIXER_IDLE;
2782        { // scope for the mLock
2783
2784            Mutex::Autolock _l(mLock);
2785
2786            if (checkForNewParameters_l()) {
2787                mixBufferSize = mFrameCount*mFrameSize;
2788                updateWaitTime();
2789                activeSleepTime = activeSleepTimeUs();
2790                idleSleepTime = idleSleepTimeUs();
2791            }
2792
2793            const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
2794
2795            for (size_t i = 0; i < mOutputTracks.size(); i++) {
2796                outputTracks.add(mOutputTracks[i]);
2797            }
2798
2799            // put audio hardware into standby after short delay
2800            if UNLIKELY((!activeTracks.size() && systemTime() > standbyTime) ||
2801                         mSuspended) {
2802                if (!mStandby) {
2803                    for (size_t i = 0; i < outputTracks.size(); i++) {
2804                        outputTracks[i]->stop();
2805                    }
2806                    mStandby = true;
2807                    mBytesWritten = 0;
2808                }
2809
2810                if (!activeTracks.size() && mConfigEvents.isEmpty()) {
2811                    // we're about to wait, flush the binder command buffer
2812                    IPCThreadState::self()->flushCommands();
2813                    outputTracks.clear();
2814
2815                    if (exitPending()) break;
2816
2817                    releaseWakeLock_l();
2818                    LOGV("DuplicatingThread %p TID %d going to sleep\n", this, gettid());
2819                    mWaitWorkCV.wait(mLock);
2820                    LOGV("DuplicatingThread %p TID %d waking up\n", this, gettid());
2821                    acquireWakeLock_l();
2822
2823                    if (mMasterMute == false) {
2824                        char value[PROPERTY_VALUE_MAX];
2825                        property_get("ro.audio.silent", value, "0");
2826                        if (atoi(value)) {
2827                            LOGD("Silence is golden");
2828                            setMasterMute(true);
2829                        }
2830                    }
2831
2832                    standbyTime = systemTime() + kStandbyTimeInNsecs;
2833                    sleepTime = idleSleepTime;
2834                    continue;
2835                }
2836            }
2837
2838            mixerStatus = prepareTracks_l(activeTracks, &tracksToRemove);
2839
2840            // prevent any changes in effect chain list and in each effect chain
2841            // during mixing and effect process as the audio buffers could be deleted
2842            // or modified if an effect is created or deleted
2843            lockEffectChains_l(effectChains);
2844        }
2845
2846        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
2847            // mix buffers...
2848            if (outputsReady(outputTracks)) {
2849                mAudioMixer->process();
2850            } else {
2851                memset(mMixBuffer, 0, mixBufferSize);
2852            }
2853            sleepTime = 0;
2854            writeFrames = mFrameCount;
2855        } else {
2856            if (sleepTime == 0) {
2857                if (mixerStatus == MIXER_TRACKS_ENABLED) {
2858                    sleepTime = activeSleepTime;
2859                } else {
2860                    sleepTime = idleSleepTime;
2861                }
2862            } else if (mBytesWritten != 0) {
2863                // flush remaining overflow buffers in output tracks
2864                for (size_t i = 0; i < outputTracks.size(); i++) {
2865                    if (outputTracks[i]->isActive()) {
2866                        sleepTime = 0;
2867                        writeFrames = 0;
2868                        memset(mMixBuffer, 0, mixBufferSize);
2869                        break;
2870                    }
2871                }
2872            }
2873        }
2874
2875        if (mSuspended) {
2876            sleepTime = suspendSleepTimeUs();
2877        }
2878        // sleepTime == 0 means we must write to audio hardware
2879        if (sleepTime == 0) {
2880            for (size_t i = 0; i < effectChains.size(); i ++) {
2881                effectChains[i]->process_l();
2882            }
2883            // enable changes in effect chain
2884            unlockEffectChains(effectChains);
2885
2886            standbyTime = systemTime() + kStandbyTimeInNsecs;
2887            for (size_t i = 0; i < outputTracks.size(); i++) {
2888                outputTracks[i]->write(mMixBuffer, writeFrames);
2889            }
2890            mStandby = false;
2891            mBytesWritten += mixBufferSize;
2892        } else {
2893            // enable changes in effect chain
2894            unlockEffectChains(effectChains);
2895            usleep(sleepTime);
2896        }
2897
2898        // finally let go of all our tracks, without the lock held
2899        // since we can't guarantee the destructors won't acquire that
2900        // same lock.
2901        tracksToRemove.clear();
2902        outputTracks.clear();
2903
2904        // Effect chains will be actually deleted here if they were removed from
2905        // mEffectChains list during mixing or effects processing
2906        effectChains.clear();
2907    }
2908
2909    releaseWakeLock();
2910
2911    return false;
2912}
2913
2914void AudioFlinger::DuplicatingThread::addOutputTrack(MixerThread *thread)
2915{
2916    int frameCount = (3 * mFrameCount * mSampleRate) / thread->sampleRate();
2917    OutputTrack *outputTrack = new OutputTrack((ThreadBase *)thread,
2918                                            this,
2919                                            mSampleRate,
2920                                            mFormat,
2921                                            mChannelMask,
2922                                            frameCount);
2923    if (outputTrack->cblk() != NULL) {
2924        thread->setStreamVolume(AUDIO_STREAM_CNT, 1.0f);
2925        mOutputTracks.add(outputTrack);
2926        LOGV("addOutputTrack() track %p, on thread %p", outputTrack, thread);
2927        updateWaitTime();
2928    }
2929}
2930
2931void AudioFlinger::DuplicatingThread::removeOutputTrack(MixerThread *thread)
2932{
2933    Mutex::Autolock _l(mLock);
2934    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2935        if (mOutputTracks[i]->thread() == (ThreadBase *)thread) {
2936            mOutputTracks[i]->destroy();
2937            mOutputTracks.removeAt(i);
2938            updateWaitTime();
2939            return;
2940        }
2941    }
2942    LOGV("removeOutputTrack(): unkonwn thread: %p", thread);
2943}
2944
2945void AudioFlinger::DuplicatingThread::updateWaitTime()
2946{
2947    mWaitTimeMs = UINT_MAX;
2948    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2949        sp<ThreadBase> strong = mOutputTracks[i]->thread().promote();
2950        if (strong != NULL) {
2951            uint32_t waitTimeMs = (strong->frameCount() * 2 * 1000) / strong->sampleRate();
2952            if (waitTimeMs < mWaitTimeMs) {
2953                mWaitTimeMs = waitTimeMs;
2954            }
2955        }
2956    }
2957}
2958
2959
2960bool AudioFlinger::DuplicatingThread::outputsReady(SortedVector< sp<OutputTrack> > &outputTracks)
2961{
2962    for (size_t i = 0; i < outputTracks.size(); i++) {
2963        sp <ThreadBase> thread = outputTracks[i]->thread().promote();
2964        if (thread == 0) {
2965            LOGW("DuplicatingThread::outputsReady() could not promote thread on output track %p", outputTracks[i].get());
2966            return false;
2967        }
2968        PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2969        if (playbackThread->standby() && !playbackThread->isSuspended()) {
2970            LOGV("DuplicatingThread output track %p on thread %p Not Ready", outputTracks[i].get(), thread.get());
2971            return false;
2972        }
2973    }
2974    return true;
2975}
2976
2977uint32_t AudioFlinger::DuplicatingThread::activeSleepTimeUs()
2978{
2979    return (mWaitTimeMs * 1000) / 2;
2980}
2981
2982// ----------------------------------------------------------------------------
2983
2984// TrackBase constructor must be called with AudioFlinger::mLock held
2985AudioFlinger::ThreadBase::TrackBase::TrackBase(
2986            const wp<ThreadBase>& thread,
2987            const sp<Client>& client,
2988            uint32_t sampleRate,
2989            uint32_t format,
2990            uint32_t channelMask,
2991            int frameCount,
2992            uint32_t flags,
2993            const sp<IMemory>& sharedBuffer,
2994            int sessionId)
2995    :   RefBase(),
2996        mThread(thread),
2997        mClient(client),
2998        mCblk(0),
2999        mFrameCount(0),
3000        mState(IDLE),
3001        mClientTid(-1),
3002        mFormat(format),
3003        mFlags(flags & ~SYSTEM_FLAGS_MASK),
3004        mSessionId(sessionId)
3005{
3006    LOGV_IF(sharedBuffer != 0, "sharedBuffer: %p, size: %d", sharedBuffer->pointer(), sharedBuffer->size());
3007
3008    // LOGD("Creating track with %d buffers @ %d bytes", bufferCount, bufferSize);
3009   size_t size = sizeof(audio_track_cblk_t);
3010   uint8_t channelCount = popcount(channelMask);
3011   size_t bufferSize = frameCount*channelCount*sizeof(int16_t);
3012   if (sharedBuffer == 0) {
3013       size += bufferSize;
3014   }
3015
3016   if (client != NULL) {
3017        mCblkMemory = client->heap()->allocate(size);
3018        if (mCblkMemory != 0) {
3019            mCblk = static_cast<audio_track_cblk_t *>(mCblkMemory->pointer());
3020            if (mCblk) { // construct the shared structure in-place.
3021                new(mCblk) audio_track_cblk_t();
3022                // clear all buffers
3023                mCblk->frameCount = frameCount;
3024                mCblk->sampleRate = sampleRate;
3025                mChannelCount = channelCount;
3026                mChannelMask = channelMask;
3027                if (sharedBuffer == 0) {
3028                    mBuffer = (char*)mCblk + sizeof(audio_track_cblk_t);
3029                    memset(mBuffer, 0, frameCount*channelCount*sizeof(int16_t));
3030                    // Force underrun condition to avoid false underrun callback until first data is
3031                    // written to buffer (other flags are cleared)
3032                    mCblk->flags = CBLK_UNDERRUN_ON;
3033                } else {
3034                    mBuffer = sharedBuffer->pointer();
3035                }
3036                mBufferEnd = (uint8_t *)mBuffer + bufferSize;
3037            }
3038        } else {
3039            LOGE("not enough memory for AudioTrack size=%u", size);
3040            client->heap()->dump("AudioTrack");
3041            return;
3042        }
3043   } else {
3044       mCblk = (audio_track_cblk_t *)(new uint8_t[size]);
3045       if (mCblk) { // construct the shared structure in-place.
3046           new(mCblk) audio_track_cblk_t();
3047           // clear all buffers
3048           mCblk->frameCount = frameCount;
3049           mCblk->sampleRate = sampleRate;
3050           mChannelCount = channelCount;
3051           mChannelMask = channelMask;
3052           mBuffer = (char*)mCblk + sizeof(audio_track_cblk_t);
3053           memset(mBuffer, 0, frameCount*channelCount*sizeof(int16_t));
3054           // Force underrun condition to avoid false underrun callback until first data is
3055           // written to buffer (other flags are cleared)
3056           mCblk->flags = CBLK_UNDERRUN_ON;
3057           mBufferEnd = (uint8_t *)mBuffer + bufferSize;
3058       }
3059   }
3060}
3061
3062AudioFlinger::ThreadBase::TrackBase::~TrackBase()
3063{
3064    if (mCblk) {
3065        mCblk->~audio_track_cblk_t();   // destroy our shared-structure.
3066        if (mClient == NULL) {
3067            delete mCblk;
3068        }
3069    }
3070    mCblkMemory.clear();            // and free the shared memory
3071    if (mClient != NULL) {
3072        Mutex::Autolock _l(mClient->audioFlinger()->mLock);
3073        mClient.clear();
3074    }
3075}
3076
3077void AudioFlinger::ThreadBase::TrackBase::releaseBuffer(AudioBufferProvider::Buffer* buffer)
3078{
3079    buffer->raw = 0;
3080    mFrameCount = buffer->frameCount;
3081    step();
3082    buffer->frameCount = 0;
3083}
3084
3085bool AudioFlinger::ThreadBase::TrackBase::step() {
3086    bool result;
3087    audio_track_cblk_t* cblk = this->cblk();
3088
3089    result = cblk->stepServer(mFrameCount);
3090    if (!result) {
3091        LOGV("stepServer failed acquiring cblk mutex");
3092        mFlags |= STEPSERVER_FAILED;
3093    }
3094    return result;
3095}
3096
3097void AudioFlinger::ThreadBase::TrackBase::reset() {
3098    audio_track_cblk_t* cblk = this->cblk();
3099
3100    cblk->user = 0;
3101    cblk->server = 0;
3102    cblk->userBase = 0;
3103    cblk->serverBase = 0;
3104    mFlags &= (uint32_t)(~SYSTEM_FLAGS_MASK);
3105    LOGV("TrackBase::reset");
3106}
3107
3108sp<IMemory> AudioFlinger::ThreadBase::TrackBase::getCblk() const
3109{
3110    return mCblkMemory;
3111}
3112
3113int AudioFlinger::ThreadBase::TrackBase::sampleRate() const {
3114    return (int)mCblk->sampleRate;
3115}
3116
3117int AudioFlinger::ThreadBase::TrackBase::channelCount() const {
3118    return (const int)mChannelCount;
3119}
3120
3121uint32_t AudioFlinger::ThreadBase::TrackBase::channelMask() const {
3122    return mChannelMask;
3123}
3124
3125void* AudioFlinger::ThreadBase::TrackBase::getBuffer(uint32_t offset, uint32_t frames) const {
3126    audio_track_cblk_t* cblk = this->cblk();
3127    int8_t *bufferStart = (int8_t *)mBuffer + (offset-cblk->serverBase)*cblk->frameSize;
3128    int8_t *bufferEnd = bufferStart + frames * cblk->frameSize;
3129
3130    // Check validity of returned pointer in case the track control block would have been corrupted.
3131    if (bufferStart < mBuffer || bufferStart > bufferEnd || bufferEnd > mBufferEnd ||
3132        ((unsigned long)bufferStart & (unsigned long)(cblk->frameSize - 1))) {
3133        LOGE("TrackBase::getBuffer buffer out of range:\n    start: %p, end %p , mBuffer %p mBufferEnd %p\n    \
3134                server %d, serverBase %d, user %d, userBase %d",
3135                bufferStart, bufferEnd, mBuffer, mBufferEnd,
3136                cblk->server, cblk->serverBase, cblk->user, cblk->userBase);
3137        return 0;
3138    }
3139
3140    return bufferStart;
3141}
3142
3143// ----------------------------------------------------------------------------
3144
3145// Track constructor must be called with AudioFlinger::mLock and ThreadBase::mLock held
3146AudioFlinger::PlaybackThread::Track::Track(
3147            const wp<ThreadBase>& thread,
3148            const sp<Client>& client,
3149            int streamType,
3150            uint32_t sampleRate,
3151            uint32_t format,
3152            uint32_t channelMask,
3153            int frameCount,
3154            const sp<IMemory>& sharedBuffer,
3155            int sessionId)
3156    :   TrackBase(thread, client, sampleRate, format, channelMask, frameCount, 0, sharedBuffer, sessionId),
3157    mMute(false), mSharedBuffer(sharedBuffer), mName(-1), mMainBuffer(NULL), mAuxBuffer(NULL),
3158    mAuxEffectId(0), mHasVolumeController(false)
3159{
3160    if (mCblk != NULL) {
3161        sp<ThreadBase> baseThread = thread.promote();
3162        if (baseThread != 0) {
3163            PlaybackThread *playbackThread = (PlaybackThread *)baseThread.get();
3164            mName = playbackThread->getTrackName_l();
3165            mMainBuffer = playbackThread->mixBuffer();
3166        }
3167        LOGV("Track constructor name %d, calling thread %d", mName, IPCThreadState::self()->getCallingPid());
3168        if (mName < 0) {
3169            LOGE("no more track names available");
3170        }
3171        mVolume[0] = 1.0f;
3172        mVolume[1] = 1.0f;
3173        mStreamType = streamType;
3174        // NOTE: audio_track_cblk_t::frameSize for 8 bit PCM data is based on a sample size of
3175        // 16 bit because data is converted to 16 bit before being stored in buffer by AudioTrack
3176        mCblk->frameSize = audio_is_linear_pcm(format) ? mChannelCount * sizeof(int16_t) : sizeof(uint8_t);
3177    }
3178}
3179
3180AudioFlinger::PlaybackThread::Track::~Track()
3181{
3182    LOGV("PlaybackThread::Track destructor");
3183    sp<ThreadBase> thread = mThread.promote();
3184    if (thread != 0) {
3185        Mutex::Autolock _l(thread->mLock);
3186        mState = TERMINATED;
3187    }
3188}
3189
3190void AudioFlinger::PlaybackThread::Track::destroy()
3191{
3192    // NOTE: destroyTrack_l() can remove a strong reference to this Track
3193    // by removing it from mTracks vector, so there is a risk that this Tracks's
3194    // desctructor is called. As the destructor needs to lock mLock,
3195    // we must acquire a strong reference on this Track before locking mLock
3196    // here so that the destructor is called only when exiting this function.
3197    // On the other hand, as long as Track::destroy() is only called by
3198    // TrackHandle destructor, the TrackHandle still holds a strong ref on
3199    // this Track with its member mTrack.
3200    sp<Track> keep(this);
3201    { // scope for mLock
3202        sp<ThreadBase> thread = mThread.promote();
3203        if (thread != 0) {
3204            if (!isOutputTrack()) {
3205                if (mState == ACTIVE || mState == RESUMING) {
3206                    AudioSystem::stopOutput(thread->id(),
3207                                            (audio_stream_type_t)mStreamType,
3208                                            mSessionId);
3209
3210                    // to track the speaker usage
3211                    addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStop);
3212                }
3213                AudioSystem::releaseOutput(thread->id());
3214            }
3215            Mutex::Autolock _l(thread->mLock);
3216            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3217            playbackThread->destroyTrack_l(this);
3218        }
3219    }
3220}
3221
3222void AudioFlinger::PlaybackThread::Track::dump(char* buffer, size_t size)
3223{
3224    snprintf(buffer, size, "   %05d %05d %03u %03u 0x%08x %05u   %04u %1d %1d %1d %05u %05u %05u  0x%08x 0x%08x 0x%08x 0x%08x\n",
3225            mName - AudioMixer::TRACK0,
3226            (mClient == NULL) ? getpid() : mClient->pid(),
3227            mStreamType,
3228            mFormat,
3229            mChannelMask,
3230            mSessionId,
3231            mFrameCount,
3232            mState,
3233            mMute,
3234            mFillingUpStatus,
3235            mCblk->sampleRate,
3236            mCblk->volume[0],
3237            mCblk->volume[1],
3238            mCblk->server,
3239            mCblk->user,
3240            (int)mMainBuffer,
3241            (int)mAuxBuffer);
3242}
3243
3244status_t AudioFlinger::PlaybackThread::Track::getNextBuffer(AudioBufferProvider::Buffer* buffer)
3245{
3246     audio_track_cblk_t* cblk = this->cblk();
3247     uint32_t framesReady;
3248     uint32_t framesReq = buffer->frameCount;
3249
3250     // Check if last stepServer failed, try to step now
3251     if (mFlags & TrackBase::STEPSERVER_FAILED) {
3252         if (!step())  goto getNextBuffer_exit;
3253         LOGV("stepServer recovered");
3254         mFlags &= ~TrackBase::STEPSERVER_FAILED;
3255     }
3256
3257     framesReady = cblk->framesReady();
3258
3259     if (LIKELY(framesReady)) {
3260        uint32_t s = cblk->server;
3261        uint32_t bufferEnd = cblk->serverBase + cblk->frameCount;
3262
3263        bufferEnd = (cblk->loopEnd < bufferEnd) ? cblk->loopEnd : bufferEnd;
3264        if (framesReq > framesReady) {
3265            framesReq = framesReady;
3266        }
3267        if (s + framesReq > bufferEnd) {
3268            framesReq = bufferEnd - s;
3269        }
3270
3271         buffer->raw = getBuffer(s, framesReq);
3272         if (buffer->raw == 0) goto getNextBuffer_exit;
3273
3274         buffer->frameCount = framesReq;
3275        return NO_ERROR;
3276     }
3277
3278getNextBuffer_exit:
3279     buffer->raw = 0;
3280     buffer->frameCount = 0;
3281     LOGV("getNextBuffer() no more data for track %d on thread %p", mName, mThread.unsafe_get());
3282     return NOT_ENOUGH_DATA;
3283}
3284
3285bool AudioFlinger::PlaybackThread::Track::isReady() const {
3286    if (mFillingUpStatus != FS_FILLING || isStopped() || isPausing()) return true;
3287
3288    if (mCblk->framesReady() >= mCblk->frameCount ||
3289            (mCblk->flags & CBLK_FORCEREADY_MSK)) {
3290        mFillingUpStatus = FS_FILLED;
3291        android_atomic_and(~CBLK_FORCEREADY_MSK, &mCblk->flags);
3292        return true;
3293    }
3294    return false;
3295}
3296
3297status_t AudioFlinger::PlaybackThread::Track::start()
3298{
3299    status_t status = NO_ERROR;
3300    LOGV("start(%d), calling thread %d session %d",
3301            mName, IPCThreadState::self()->getCallingPid(), mSessionId);
3302    sp<ThreadBase> thread = mThread.promote();
3303    if (thread != 0) {
3304        Mutex::Autolock _l(thread->mLock);
3305        int state = mState;
3306        // here the track could be either new, or restarted
3307        // in both cases "unstop" the track
3308        if (mState == PAUSED) {
3309            mState = TrackBase::RESUMING;
3310            LOGV("PAUSED => RESUMING (%d) on thread %p", mName, this);
3311        } else {
3312            mState = TrackBase::ACTIVE;
3313            LOGV("? => ACTIVE (%d) on thread %p", mName, this);
3314        }
3315
3316        if (!isOutputTrack() && state != ACTIVE && state != RESUMING) {
3317            thread->mLock.unlock();
3318            status = AudioSystem::startOutput(thread->id(),
3319                                              (audio_stream_type_t)mStreamType,
3320                                              mSessionId);
3321            thread->mLock.lock();
3322
3323            // to track the speaker usage
3324            if (status == NO_ERROR) {
3325                addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStart);
3326            }
3327        }
3328        if (status == NO_ERROR) {
3329            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3330            playbackThread->addTrack_l(this);
3331        } else {
3332            mState = state;
3333        }
3334    } else {
3335        status = BAD_VALUE;
3336    }
3337    return status;
3338}
3339
3340void AudioFlinger::PlaybackThread::Track::stop()
3341{
3342    LOGV("stop(%d), calling thread %d", mName, IPCThreadState::self()->getCallingPid());
3343    sp<ThreadBase> thread = mThread.promote();
3344    if (thread != 0) {
3345        Mutex::Autolock _l(thread->mLock);
3346        int state = mState;
3347        if (mState > STOPPED) {
3348            mState = STOPPED;
3349            // If the track is not active (PAUSED and buffers full), flush buffers
3350            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3351            if (playbackThread->mActiveTracks.indexOf(this) < 0) {
3352                reset();
3353            }
3354            LOGV("(> STOPPED) => STOPPED (%d) on thread %p", mName, playbackThread);
3355        }
3356        if (!isOutputTrack() && (state == ACTIVE || state == RESUMING)) {
3357            thread->mLock.unlock();
3358            AudioSystem::stopOutput(thread->id(),
3359                                    (audio_stream_type_t)mStreamType,
3360                                    mSessionId);
3361            thread->mLock.lock();
3362
3363            // to track the speaker usage
3364            addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStop);
3365        }
3366    }
3367}
3368
3369void AudioFlinger::PlaybackThread::Track::pause()
3370{
3371    LOGV("pause(%d), calling thread %d", mName, IPCThreadState::self()->getCallingPid());
3372    sp<ThreadBase> thread = mThread.promote();
3373    if (thread != 0) {
3374        Mutex::Autolock _l(thread->mLock);
3375        if (mState == ACTIVE || mState == RESUMING) {
3376            mState = PAUSING;
3377            LOGV("ACTIVE/RESUMING => PAUSING (%d) on thread %p", mName, thread.get());
3378            if (!isOutputTrack()) {
3379                thread->mLock.unlock();
3380                AudioSystem::stopOutput(thread->id(),
3381                                        (audio_stream_type_t)mStreamType,
3382                                        mSessionId);
3383                thread->mLock.lock();
3384
3385                // to track the speaker usage
3386                addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStop);
3387            }
3388        }
3389    }
3390}
3391
3392void AudioFlinger::PlaybackThread::Track::flush()
3393{
3394    LOGV("flush(%d)", mName);
3395    sp<ThreadBase> thread = mThread.promote();
3396    if (thread != 0) {
3397        Mutex::Autolock _l(thread->mLock);
3398        if (mState != STOPPED && mState != PAUSED && mState != PAUSING) {
3399            return;
3400        }
3401        // No point remaining in PAUSED state after a flush => go to
3402        // STOPPED state
3403        mState = STOPPED;
3404
3405        // do not reset the track if it is still in the process of being stopped or paused.
3406        // this will be done by prepareTracks_l() when the track is stopped.
3407        PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3408        if (playbackThread->mActiveTracks.indexOf(this) < 0) {
3409            reset();
3410        }
3411    }
3412}
3413
3414void AudioFlinger::PlaybackThread::Track::reset()
3415{
3416    // Do not reset twice to avoid discarding data written just after a flush and before
3417    // the audioflinger thread detects the track is stopped.
3418    if (!mResetDone) {
3419        TrackBase::reset();
3420        // Force underrun condition to avoid false underrun callback until first data is
3421        // written to buffer
3422        android_atomic_and(~CBLK_FORCEREADY_MSK, &mCblk->flags);
3423        android_atomic_or(CBLK_UNDERRUN_ON, &mCblk->flags);
3424        mFillingUpStatus = FS_FILLING;
3425        mResetDone = true;
3426    }
3427}
3428
3429void AudioFlinger::PlaybackThread::Track::mute(bool muted)
3430{
3431    mMute = muted;
3432}
3433
3434void AudioFlinger::PlaybackThread::Track::setVolume(float left, float right)
3435{
3436    mVolume[0] = left;
3437    mVolume[1] = right;
3438}
3439
3440status_t AudioFlinger::PlaybackThread::Track::attachAuxEffect(int EffectId)
3441{
3442    status_t status = DEAD_OBJECT;
3443    sp<ThreadBase> thread = mThread.promote();
3444    if (thread != 0) {
3445       PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3446       status = playbackThread->attachAuxEffect(this, EffectId);
3447    }
3448    return status;
3449}
3450
3451void AudioFlinger::PlaybackThread::Track::setAuxBuffer(int EffectId, int32_t *buffer)
3452{
3453    mAuxEffectId = EffectId;
3454    mAuxBuffer = buffer;
3455}
3456
3457// ----------------------------------------------------------------------------
3458
3459// RecordTrack constructor must be called with AudioFlinger::mLock held
3460AudioFlinger::RecordThread::RecordTrack::RecordTrack(
3461            const wp<ThreadBase>& thread,
3462            const sp<Client>& client,
3463            uint32_t sampleRate,
3464            uint32_t format,
3465            uint32_t channelMask,
3466            int frameCount,
3467            uint32_t flags,
3468            int sessionId)
3469    :   TrackBase(thread, client, sampleRate, format,
3470                  channelMask, frameCount, flags, 0, sessionId),
3471        mOverflow(false)
3472{
3473    if (mCblk != NULL) {
3474       LOGV("RecordTrack constructor, size %d", (int)mBufferEnd - (int)mBuffer);
3475       if (format == AUDIO_FORMAT_PCM_16_BIT) {
3476           mCblk->frameSize = mChannelCount * sizeof(int16_t);
3477       } else if (format == AUDIO_FORMAT_PCM_8_BIT) {
3478           mCblk->frameSize = mChannelCount * sizeof(int8_t);
3479       } else {
3480           mCblk->frameSize = sizeof(int8_t);
3481       }
3482    }
3483}
3484
3485AudioFlinger::RecordThread::RecordTrack::~RecordTrack()
3486{
3487    sp<ThreadBase> thread = mThread.promote();
3488    if (thread != 0) {
3489        AudioSystem::releaseInput(thread->id());
3490    }
3491}
3492
3493status_t AudioFlinger::RecordThread::RecordTrack::getNextBuffer(AudioBufferProvider::Buffer* buffer)
3494{
3495    audio_track_cblk_t* cblk = this->cblk();
3496    uint32_t framesAvail;
3497    uint32_t framesReq = buffer->frameCount;
3498
3499     // Check if last stepServer failed, try to step now
3500    if (mFlags & TrackBase::STEPSERVER_FAILED) {
3501        if (!step()) goto getNextBuffer_exit;
3502        LOGV("stepServer recovered");
3503        mFlags &= ~TrackBase::STEPSERVER_FAILED;
3504    }
3505
3506    framesAvail = cblk->framesAvailable_l();
3507
3508    if (LIKELY(framesAvail)) {
3509        uint32_t s = cblk->server;
3510        uint32_t bufferEnd = cblk->serverBase + cblk->frameCount;
3511
3512        if (framesReq > framesAvail) {
3513            framesReq = framesAvail;
3514        }
3515        if (s + framesReq > bufferEnd) {
3516            framesReq = bufferEnd - s;
3517        }
3518
3519        buffer->raw = getBuffer(s, framesReq);
3520        if (buffer->raw == 0) goto getNextBuffer_exit;
3521
3522        buffer->frameCount = framesReq;
3523        return NO_ERROR;
3524    }
3525
3526getNextBuffer_exit:
3527    buffer->raw = 0;
3528    buffer->frameCount = 0;
3529    return NOT_ENOUGH_DATA;
3530}
3531
3532status_t AudioFlinger::RecordThread::RecordTrack::start()
3533{
3534    sp<ThreadBase> thread = mThread.promote();
3535    if (thread != 0) {
3536        RecordThread *recordThread = (RecordThread *)thread.get();
3537        return recordThread->start(this);
3538    } else {
3539        return BAD_VALUE;
3540    }
3541}
3542
3543void AudioFlinger::RecordThread::RecordTrack::stop()
3544{
3545    sp<ThreadBase> thread = mThread.promote();
3546    if (thread != 0) {
3547        RecordThread *recordThread = (RecordThread *)thread.get();
3548        recordThread->stop(this);
3549        TrackBase::reset();
3550        // Force overerrun condition to avoid false overrun callback until first data is
3551        // read from buffer
3552        android_atomic_or(CBLK_UNDERRUN_ON, &mCblk->flags);
3553    }
3554}
3555
3556void AudioFlinger::RecordThread::RecordTrack::dump(char* buffer, size_t size)
3557{
3558    snprintf(buffer, size, "   %05d %03u 0x%08x %05d   %04u %01d %05u  %08x %08x\n",
3559            (mClient == NULL) ? getpid() : mClient->pid(),
3560            mFormat,
3561            mChannelMask,
3562            mSessionId,
3563            mFrameCount,
3564            mState,
3565            mCblk->sampleRate,
3566            mCblk->server,
3567            mCblk->user);
3568}
3569
3570
3571// ----------------------------------------------------------------------------
3572
3573AudioFlinger::PlaybackThread::OutputTrack::OutputTrack(
3574            const wp<ThreadBase>& thread,
3575            DuplicatingThread *sourceThread,
3576            uint32_t sampleRate,
3577            uint32_t format,
3578            uint32_t channelMask,
3579            int frameCount)
3580    :   Track(thread, NULL, AUDIO_STREAM_CNT, sampleRate, format, channelMask, frameCount, NULL, 0),
3581    mActive(false), mSourceThread(sourceThread)
3582{
3583
3584    PlaybackThread *playbackThread = (PlaybackThread *)thread.unsafe_get();
3585    if (mCblk != NULL) {
3586        mCblk->flags |= CBLK_DIRECTION_OUT;
3587        mCblk->buffers = (char*)mCblk + sizeof(audio_track_cblk_t);
3588        mCblk->volume[0] = mCblk->volume[1] = 0x1000;
3589        mOutBuffer.frameCount = 0;
3590        playbackThread->mTracks.add(this);
3591        LOGV("OutputTrack constructor mCblk %p, mBuffer %p, mCblk->buffers %p, " \
3592                "mCblk->frameCount %d, mCblk->sampleRate %d, mChannelMask 0x%08x mBufferEnd %p",
3593                mCblk, mBuffer, mCblk->buffers,
3594                mCblk->frameCount, mCblk->sampleRate, mChannelMask, mBufferEnd);
3595    } else {
3596        LOGW("Error creating output track on thread %p", playbackThread);
3597    }
3598}
3599
3600AudioFlinger::PlaybackThread::OutputTrack::~OutputTrack()
3601{
3602    clearBufferQueue();
3603}
3604
3605status_t AudioFlinger::PlaybackThread::OutputTrack::start()
3606{
3607    status_t status = Track::start();
3608    if (status != NO_ERROR) {
3609        return status;
3610    }
3611
3612    mActive = true;
3613    mRetryCount = 127;
3614    return status;
3615}
3616
3617void AudioFlinger::PlaybackThread::OutputTrack::stop()
3618{
3619    Track::stop();
3620    clearBufferQueue();
3621    mOutBuffer.frameCount = 0;
3622    mActive = false;
3623}
3624
3625bool AudioFlinger::PlaybackThread::OutputTrack::write(int16_t* data, uint32_t frames)
3626{
3627    Buffer *pInBuffer;
3628    Buffer inBuffer;
3629    uint32_t channelCount = mChannelCount;
3630    bool outputBufferFull = false;
3631    inBuffer.frameCount = frames;
3632    inBuffer.i16 = data;
3633
3634    uint32_t waitTimeLeftMs = mSourceThread->waitTimeMs();
3635
3636    if (!mActive && frames != 0) {
3637        start();
3638        sp<ThreadBase> thread = mThread.promote();
3639        if (thread != 0) {
3640            MixerThread *mixerThread = (MixerThread *)thread.get();
3641            if (mCblk->frameCount > frames){
3642                if (mBufferQueue.size() < kMaxOverFlowBuffers) {
3643                    uint32_t startFrames = (mCblk->frameCount - frames);
3644                    pInBuffer = new Buffer;
3645                    pInBuffer->mBuffer = new int16_t[startFrames * channelCount];
3646                    pInBuffer->frameCount = startFrames;
3647                    pInBuffer->i16 = pInBuffer->mBuffer;
3648                    memset(pInBuffer->raw, 0, startFrames * channelCount * sizeof(int16_t));
3649                    mBufferQueue.add(pInBuffer);
3650                } else {
3651                    LOGW ("OutputTrack::write() %p no more buffers in queue", this);
3652                }
3653            }
3654        }
3655    }
3656
3657    while (waitTimeLeftMs) {
3658        // First write pending buffers, then new data
3659        if (mBufferQueue.size()) {
3660            pInBuffer = mBufferQueue.itemAt(0);
3661        } else {
3662            pInBuffer = &inBuffer;
3663        }
3664
3665        if (pInBuffer->frameCount == 0) {
3666            break;
3667        }
3668
3669        if (mOutBuffer.frameCount == 0) {
3670            mOutBuffer.frameCount = pInBuffer->frameCount;
3671            nsecs_t startTime = systemTime();
3672            if (obtainBuffer(&mOutBuffer, waitTimeLeftMs) == (status_t)AudioTrack::NO_MORE_BUFFERS) {
3673                LOGV ("OutputTrack::write() %p thread %p no more output buffers", this, mThread.unsafe_get());
3674                outputBufferFull = true;
3675                break;
3676            }
3677            uint32_t waitTimeMs = (uint32_t)ns2ms(systemTime() - startTime);
3678            if (waitTimeLeftMs >= waitTimeMs) {
3679                waitTimeLeftMs -= waitTimeMs;
3680            } else {
3681                waitTimeLeftMs = 0;
3682            }
3683        }
3684
3685        uint32_t outFrames = pInBuffer->frameCount > mOutBuffer.frameCount ? mOutBuffer.frameCount : pInBuffer->frameCount;
3686        memcpy(mOutBuffer.raw, pInBuffer->raw, outFrames * channelCount * sizeof(int16_t));
3687        mCblk->stepUser(outFrames);
3688        pInBuffer->frameCount -= outFrames;
3689        pInBuffer->i16 += outFrames * channelCount;
3690        mOutBuffer.frameCount -= outFrames;
3691        mOutBuffer.i16 += outFrames * channelCount;
3692
3693        if (pInBuffer->frameCount == 0) {
3694            if (mBufferQueue.size()) {
3695                mBufferQueue.removeAt(0);
3696                delete [] pInBuffer->mBuffer;
3697                delete pInBuffer;
3698                LOGV("OutputTrack::write() %p thread %p released overflow buffer %d", this, mThread.unsafe_get(), mBufferQueue.size());
3699            } else {
3700                break;
3701            }
3702        }
3703    }
3704
3705    // If we could not write all frames, allocate a buffer and queue it for next time.
3706    if (inBuffer.frameCount) {
3707        sp<ThreadBase> thread = mThread.promote();
3708        if (thread != 0 && !thread->standby()) {
3709            if (mBufferQueue.size() < kMaxOverFlowBuffers) {
3710                pInBuffer = new Buffer;
3711                pInBuffer->mBuffer = new int16_t[inBuffer.frameCount * channelCount];
3712                pInBuffer->frameCount = inBuffer.frameCount;
3713                pInBuffer->i16 = pInBuffer->mBuffer;
3714                memcpy(pInBuffer->raw, inBuffer.raw, inBuffer.frameCount * channelCount * sizeof(int16_t));
3715                mBufferQueue.add(pInBuffer);
3716                LOGV("OutputTrack::write() %p thread %p adding overflow buffer %d", this, mThread.unsafe_get(), mBufferQueue.size());
3717            } else {
3718                LOGW("OutputTrack::write() %p thread %p no more overflow buffers", mThread.unsafe_get(), this);
3719            }
3720        }
3721    }
3722
3723    // Calling write() with a 0 length buffer, means that no more data will be written:
3724    // If no more buffers are pending, fill output track buffer to make sure it is started
3725    // by output mixer.
3726    if (frames == 0 && mBufferQueue.size() == 0) {
3727        if (mCblk->user < mCblk->frameCount) {
3728            frames = mCblk->frameCount - mCblk->user;
3729            pInBuffer = new Buffer;
3730            pInBuffer->mBuffer = new int16_t[frames * channelCount];
3731            pInBuffer->frameCount = frames;
3732            pInBuffer->i16 = pInBuffer->mBuffer;
3733            memset(pInBuffer->raw, 0, frames * channelCount * sizeof(int16_t));
3734            mBufferQueue.add(pInBuffer);
3735        } else if (mActive) {
3736            stop();
3737        }
3738    }
3739
3740    return outputBufferFull;
3741}
3742
3743status_t AudioFlinger::PlaybackThread::OutputTrack::obtainBuffer(AudioBufferProvider::Buffer* buffer, uint32_t waitTimeMs)
3744{
3745    int active;
3746    status_t result;
3747    audio_track_cblk_t* cblk = mCblk;
3748    uint32_t framesReq = buffer->frameCount;
3749
3750//    LOGV("OutputTrack::obtainBuffer user %d, server %d", cblk->user, cblk->server);
3751    buffer->frameCount  = 0;
3752
3753    uint32_t framesAvail = cblk->framesAvailable();
3754
3755
3756    if (framesAvail == 0) {
3757        Mutex::Autolock _l(cblk->lock);
3758        goto start_loop_here;
3759        while (framesAvail == 0) {
3760            active = mActive;
3761            if (UNLIKELY(!active)) {
3762                LOGV("Not active and NO_MORE_BUFFERS");
3763                return AudioTrack::NO_MORE_BUFFERS;
3764            }
3765            result = cblk->cv.waitRelative(cblk->lock, milliseconds(waitTimeMs));
3766            if (result != NO_ERROR) {
3767                return AudioTrack::NO_MORE_BUFFERS;
3768            }
3769            // read the server count again
3770        start_loop_here:
3771            framesAvail = cblk->framesAvailable_l();
3772        }
3773    }
3774
3775//    if (framesAvail < framesReq) {
3776//        return AudioTrack::NO_MORE_BUFFERS;
3777//    }
3778
3779    if (framesReq > framesAvail) {
3780        framesReq = framesAvail;
3781    }
3782
3783    uint32_t u = cblk->user;
3784    uint32_t bufferEnd = cblk->userBase + cblk->frameCount;
3785
3786    if (u + framesReq > bufferEnd) {
3787        framesReq = bufferEnd - u;
3788    }
3789
3790    buffer->frameCount  = framesReq;
3791    buffer->raw         = (void *)cblk->buffer(u);
3792    return NO_ERROR;
3793}
3794
3795
3796void AudioFlinger::PlaybackThread::OutputTrack::clearBufferQueue()
3797{
3798    size_t size = mBufferQueue.size();
3799    Buffer *pBuffer;
3800
3801    for (size_t i = 0; i < size; i++) {
3802        pBuffer = mBufferQueue.itemAt(i);
3803        delete [] pBuffer->mBuffer;
3804        delete pBuffer;
3805    }
3806    mBufferQueue.clear();
3807}
3808
3809// ----------------------------------------------------------------------------
3810
3811AudioFlinger::Client::Client(const sp<AudioFlinger>& audioFlinger, pid_t pid)
3812    :   RefBase(),
3813        mAudioFlinger(audioFlinger),
3814        mMemoryDealer(new MemoryDealer(1024*1024, "AudioFlinger::Client")),
3815        mPid(pid)
3816{
3817    // 1 MB of address space is good for 32 tracks, 8 buffers each, 4 KB/buffer
3818}
3819
3820// Client destructor must be called with AudioFlinger::mLock held
3821AudioFlinger::Client::~Client()
3822{
3823    mAudioFlinger->removeClient_l(mPid);
3824}
3825
3826const sp<MemoryDealer>& AudioFlinger::Client::heap() const
3827{
3828    return mMemoryDealer;
3829}
3830
3831// ----------------------------------------------------------------------------
3832
3833AudioFlinger::NotificationClient::NotificationClient(const sp<AudioFlinger>& audioFlinger,
3834                                                     const sp<IAudioFlingerClient>& client,
3835                                                     pid_t pid)
3836    : mAudioFlinger(audioFlinger), mPid(pid), mClient(client)
3837{
3838}
3839
3840AudioFlinger::NotificationClient::~NotificationClient()
3841{
3842    mClient.clear();
3843}
3844
3845void AudioFlinger::NotificationClient::binderDied(const wp<IBinder>& who)
3846{
3847    sp<NotificationClient> keep(this);
3848    {
3849        mAudioFlinger->removeNotificationClient(mPid);
3850    }
3851}
3852
3853// ----------------------------------------------------------------------------
3854
3855AudioFlinger::TrackHandle::TrackHandle(const sp<AudioFlinger::PlaybackThread::Track>& track)
3856    : BnAudioTrack(),
3857      mTrack(track)
3858{
3859}
3860
3861AudioFlinger::TrackHandle::~TrackHandle() {
3862    // just stop the track on deletion, associated resources
3863    // will be freed from the main thread once all pending buffers have
3864    // been played. Unless it's not in the active track list, in which
3865    // case we free everything now...
3866    mTrack->destroy();
3867}
3868
3869status_t AudioFlinger::TrackHandle::start() {
3870    return mTrack->start();
3871}
3872
3873void AudioFlinger::TrackHandle::stop() {
3874    mTrack->stop();
3875}
3876
3877void AudioFlinger::TrackHandle::flush() {
3878    mTrack->flush();
3879}
3880
3881void AudioFlinger::TrackHandle::mute(bool e) {
3882    mTrack->mute(e);
3883}
3884
3885void AudioFlinger::TrackHandle::pause() {
3886    mTrack->pause();
3887}
3888
3889void AudioFlinger::TrackHandle::setVolume(float left, float right) {
3890    mTrack->setVolume(left, right);
3891}
3892
3893sp<IMemory> AudioFlinger::TrackHandle::getCblk() const {
3894    return mTrack->getCblk();
3895}
3896
3897status_t AudioFlinger::TrackHandle::attachAuxEffect(int EffectId)
3898{
3899    return mTrack->attachAuxEffect(EffectId);
3900}
3901
3902status_t AudioFlinger::TrackHandle::onTransact(
3903    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
3904{
3905    return BnAudioTrack::onTransact(code, data, reply, flags);
3906}
3907
3908// ----------------------------------------------------------------------------
3909
3910sp<IAudioRecord> AudioFlinger::openRecord(
3911        pid_t pid,
3912        int input,
3913        uint32_t sampleRate,
3914        uint32_t format,
3915        uint32_t channelMask,
3916        int frameCount,
3917        uint32_t flags,
3918        int *sessionId,
3919        status_t *status)
3920{
3921    sp<RecordThread::RecordTrack> recordTrack;
3922    sp<RecordHandle> recordHandle;
3923    sp<Client> client;
3924    wp<Client> wclient;
3925    status_t lStatus;
3926    RecordThread *thread;
3927    size_t inFrameCount;
3928    int lSessionId;
3929
3930    // check calling permissions
3931    if (!recordingAllowed()) {
3932        lStatus = PERMISSION_DENIED;
3933        goto Exit;
3934    }
3935
3936    // add client to list
3937    { // scope for mLock
3938        Mutex::Autolock _l(mLock);
3939        thread = checkRecordThread_l(input);
3940        if (thread == NULL) {
3941            lStatus = BAD_VALUE;
3942            goto Exit;
3943        }
3944
3945        wclient = mClients.valueFor(pid);
3946        if (wclient != NULL) {
3947            client = wclient.promote();
3948        } else {
3949            client = new Client(this, pid);
3950            mClients.add(pid, client);
3951        }
3952
3953        // If no audio session id is provided, create one here
3954        if (sessionId != NULL && *sessionId != AUDIO_SESSION_OUTPUT_MIX) {
3955            lSessionId = *sessionId;
3956        } else {
3957            lSessionId = nextUniqueId();
3958            if (sessionId != NULL) {
3959                *sessionId = lSessionId;
3960            }
3961        }
3962        // create new record track. The record track uses one track in mHardwareMixerThread by convention.
3963        recordTrack = thread->createRecordTrack_l(client,
3964                                                sampleRate,
3965                                                format,
3966                                                channelMask,
3967                                                frameCount,
3968                                                flags,
3969                                                lSessionId,
3970                                                &lStatus);
3971    }
3972    if (lStatus != NO_ERROR) {
3973        // remove local strong reference to Client before deleting the RecordTrack so that the Client
3974        // destructor is called by the TrackBase destructor with mLock held
3975        client.clear();
3976        recordTrack.clear();
3977        goto Exit;
3978    }
3979
3980    // return to handle to client
3981    recordHandle = new RecordHandle(recordTrack);
3982    lStatus = NO_ERROR;
3983
3984Exit:
3985    if (status) {
3986        *status = lStatus;
3987    }
3988    return recordHandle;
3989}
3990
3991// ----------------------------------------------------------------------------
3992
3993AudioFlinger::RecordHandle::RecordHandle(const sp<AudioFlinger::RecordThread::RecordTrack>& recordTrack)
3994    : BnAudioRecord(),
3995    mRecordTrack(recordTrack)
3996{
3997}
3998
3999AudioFlinger::RecordHandle::~RecordHandle() {
4000    stop();
4001}
4002
4003status_t AudioFlinger::RecordHandle::start() {
4004    LOGV("RecordHandle::start()");
4005    return mRecordTrack->start();
4006}
4007
4008void AudioFlinger::RecordHandle::stop() {
4009    LOGV("RecordHandle::stop()");
4010    mRecordTrack->stop();
4011}
4012
4013sp<IMemory> AudioFlinger::RecordHandle::getCblk() const {
4014    return mRecordTrack->getCblk();
4015}
4016
4017status_t AudioFlinger::RecordHandle::onTransact(
4018    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
4019{
4020    return BnAudioRecord::onTransact(code, data, reply, flags);
4021}
4022
4023// ----------------------------------------------------------------------------
4024
4025AudioFlinger::RecordThread::RecordThread(const sp<AudioFlinger>& audioFlinger,
4026                                         AudioStreamIn *input,
4027                                         uint32_t sampleRate,
4028                                         uint32_t channels,
4029                                         int id,
4030                                         uint32_t device) :
4031    ThreadBase(audioFlinger, id, device),
4032    mInput(input), mTrack(NULL), mResampler(0), mRsmpOutBuffer(0), mRsmpInBuffer(0)
4033{
4034    mType = ThreadBase::RECORD;
4035
4036    snprintf(mName, kNameLength, "AudioIn_%d", id);
4037
4038    mReqChannelCount = popcount(channels);
4039    mReqSampleRate = sampleRate;
4040    readInputParameters();
4041}
4042
4043
4044AudioFlinger::RecordThread::~RecordThread()
4045{
4046    delete[] mRsmpInBuffer;
4047    if (mResampler != 0) {
4048        delete mResampler;
4049        delete[] mRsmpOutBuffer;
4050    }
4051}
4052
4053void AudioFlinger::RecordThread::onFirstRef()
4054{
4055    run(mName, PRIORITY_URGENT_AUDIO);
4056}
4057
4058bool AudioFlinger::RecordThread::threadLoop()
4059{
4060    AudioBufferProvider::Buffer buffer;
4061    sp<RecordTrack> activeTrack;
4062    Vector< sp<EffectChain> > effectChains;
4063
4064    nsecs_t lastWarning = 0;
4065
4066    acquireWakeLock();
4067
4068    // start recording
4069    while (!exitPending()) {
4070
4071        processConfigEvents();
4072
4073        { // scope for mLock
4074            Mutex::Autolock _l(mLock);
4075            checkForNewParameters_l();
4076            if (mActiveTrack == 0 && mConfigEvents.isEmpty()) {
4077                if (!mStandby) {
4078                    mInput->stream->common.standby(&mInput->stream->common);
4079                    mStandby = true;
4080                }
4081
4082                if (exitPending()) break;
4083
4084                releaseWakeLock_l();
4085                LOGV("RecordThread: loop stopping");
4086                // go to sleep
4087                mWaitWorkCV.wait(mLock);
4088                LOGV("RecordThread: loop starting");
4089                acquireWakeLock_l();
4090                continue;
4091            }
4092            if (mActiveTrack != 0) {
4093                if (mActiveTrack->mState == TrackBase::PAUSING) {
4094                    if (!mStandby) {
4095                        mInput->stream->common.standby(&mInput->stream->common);
4096                        mStandby = true;
4097                    }
4098                    mActiveTrack.clear();
4099                    mStartStopCond.broadcast();
4100                } else if (mActiveTrack->mState == TrackBase::RESUMING) {
4101                    if (mReqChannelCount != mActiveTrack->channelCount()) {
4102                        mActiveTrack.clear();
4103                        mStartStopCond.broadcast();
4104                    } else if (mBytesRead != 0) {
4105                        // record start succeeds only if first read from audio input
4106                        // succeeds
4107                        if (mBytesRead > 0) {
4108                            mActiveTrack->mState = TrackBase::ACTIVE;
4109                        } else {
4110                            mActiveTrack.clear();
4111                        }
4112                        mStartStopCond.broadcast();
4113                    }
4114                    mStandby = false;
4115                }
4116            }
4117            lockEffectChains_l(effectChains);
4118        }
4119
4120        if (mActiveTrack != 0) {
4121            if (mActiveTrack->mState != TrackBase::ACTIVE &&
4122                mActiveTrack->mState != TrackBase::RESUMING) {
4123                unlockEffectChains(effectChains);
4124                usleep(kRecordThreadSleepUs);
4125                continue;
4126            }
4127            for (size_t i = 0; i < effectChains.size(); i ++) {
4128                effectChains[i]->process_l();
4129            }
4130
4131            buffer.frameCount = mFrameCount;
4132            if (LIKELY(mActiveTrack->getNextBuffer(&buffer) == NO_ERROR)) {
4133                size_t framesOut = buffer.frameCount;
4134                if (mResampler == 0) {
4135                    // no resampling
4136                    while (framesOut) {
4137                        size_t framesIn = mFrameCount - mRsmpInIndex;
4138                        if (framesIn) {
4139                            int8_t *src = (int8_t *)mRsmpInBuffer + mRsmpInIndex * mFrameSize;
4140                            int8_t *dst = buffer.i8 + (buffer.frameCount - framesOut) * mActiveTrack->mCblk->frameSize;
4141                            if (framesIn > framesOut)
4142                                framesIn = framesOut;
4143                            mRsmpInIndex += framesIn;
4144                            framesOut -= framesIn;
4145                            if ((int)mChannelCount == mReqChannelCount ||
4146                                mFormat != AUDIO_FORMAT_PCM_16_BIT) {
4147                                memcpy(dst, src, framesIn * mFrameSize);
4148                            } else {
4149                                int16_t *src16 = (int16_t *)src;
4150                                int16_t *dst16 = (int16_t *)dst;
4151                                if (mChannelCount == 1) {
4152                                    while (framesIn--) {
4153                                        *dst16++ = *src16;
4154                                        *dst16++ = *src16++;
4155                                    }
4156                                } else {
4157                                    while (framesIn--) {
4158                                        *dst16++ = (int16_t)(((int32_t)*src16 + (int32_t)*(src16 + 1)) >> 1);
4159                                        src16 += 2;
4160                                    }
4161                                }
4162                            }
4163                        }
4164                        if (framesOut && mFrameCount == mRsmpInIndex) {
4165                            if (framesOut == mFrameCount &&
4166                                ((int)mChannelCount == mReqChannelCount || mFormat != AUDIO_FORMAT_PCM_16_BIT)) {
4167                                mBytesRead = mInput->stream->read(mInput->stream, buffer.raw, mInputBytes);
4168                                framesOut = 0;
4169                            } else {
4170                                mBytesRead = mInput->stream->read(mInput->stream, mRsmpInBuffer, mInputBytes);
4171                                mRsmpInIndex = 0;
4172                            }
4173                            if (mBytesRead < 0) {
4174                                LOGE("Error reading audio input");
4175                                if (mActiveTrack->mState == TrackBase::ACTIVE) {
4176                                    // Force input into standby so that it tries to
4177                                    // recover at next read attempt
4178                                    mInput->stream->common.standby(&mInput->stream->common);
4179                                    usleep(kRecordThreadSleepUs);
4180                                }
4181                                mRsmpInIndex = mFrameCount;
4182                                framesOut = 0;
4183                                buffer.frameCount = 0;
4184                            }
4185                        }
4186                    }
4187                } else {
4188                    // resampling
4189
4190                    memset(mRsmpOutBuffer, 0, framesOut * 2 * sizeof(int32_t));
4191                    // alter output frame count as if we were expecting stereo samples
4192                    if (mChannelCount == 1 && mReqChannelCount == 1) {
4193                        framesOut >>= 1;
4194                    }
4195                    mResampler->resample(mRsmpOutBuffer, framesOut, this);
4196                    // ditherAndClamp() works as long as all buffers returned by mActiveTrack->getNextBuffer()
4197                    // are 32 bit aligned which should be always true.
4198                    if (mChannelCount == 2 && mReqChannelCount == 1) {
4199                        AudioMixer::ditherAndClamp(mRsmpOutBuffer, mRsmpOutBuffer, framesOut);
4200                        // the resampler always outputs stereo samples: do post stereo to mono conversion
4201                        int16_t *src = (int16_t *)mRsmpOutBuffer;
4202                        int16_t *dst = buffer.i16;
4203                        while (framesOut--) {
4204                            *dst++ = (int16_t)(((int32_t)*src + (int32_t)*(src + 1)) >> 1);
4205                            src += 2;
4206                        }
4207                    } else {
4208                        AudioMixer::ditherAndClamp((int32_t *)buffer.raw, mRsmpOutBuffer, framesOut);
4209                    }
4210
4211                }
4212                mActiveTrack->releaseBuffer(&buffer);
4213                mActiveTrack->overflow();
4214            }
4215            // client isn't retrieving buffers fast enough
4216            else {
4217                if (!mActiveTrack->setOverflow()) {
4218                    nsecs_t now = systemTime();
4219                    if ((now - lastWarning) > kWarningThrottle) {
4220                        LOGW("RecordThread: buffer overflow");
4221                        lastWarning = now;
4222                    }
4223                }
4224                // Release the processor for a while before asking for a new buffer.
4225                // This will give the application more chance to read from the buffer and
4226                // clear the overflow.
4227                usleep(kRecordThreadSleepUs);
4228            }
4229        }
4230        // enable changes in effect chain
4231        unlockEffectChains(effectChains);
4232        effectChains.clear();
4233    }
4234
4235    if (!mStandby) {
4236        mInput->stream->common.standby(&mInput->stream->common);
4237    }
4238    mActiveTrack.clear();
4239
4240    mStartStopCond.broadcast();
4241
4242    releaseWakeLock();
4243
4244    LOGV("RecordThread %p exiting", this);
4245    return false;
4246}
4247
4248
4249sp<AudioFlinger::RecordThread::RecordTrack>  AudioFlinger::RecordThread::createRecordTrack_l(
4250        const sp<AudioFlinger::Client>& client,
4251        uint32_t sampleRate,
4252        int format,
4253        int channelMask,
4254        int frameCount,
4255        uint32_t flags,
4256        int sessionId,
4257        status_t *status)
4258{
4259    sp<RecordTrack> track;
4260    status_t lStatus;
4261
4262    lStatus = initCheck();
4263    if (lStatus != NO_ERROR) {
4264        LOGE("Audio driver not initialized.");
4265        goto Exit;
4266    }
4267
4268    { // scope for mLock
4269        Mutex::Autolock _l(mLock);
4270
4271        track = new RecordTrack(this, client, sampleRate,
4272                      format, channelMask, frameCount, flags, sessionId);
4273
4274        if (track->getCblk() == NULL) {
4275            lStatus = NO_MEMORY;
4276            goto Exit;
4277        }
4278
4279        mTrack = track.get();
4280
4281    }
4282    lStatus = NO_ERROR;
4283
4284Exit:
4285    if (status) {
4286        *status = lStatus;
4287    }
4288    return track;
4289}
4290
4291status_t AudioFlinger::RecordThread::start(RecordThread::RecordTrack* recordTrack)
4292{
4293    LOGV("RecordThread::start");
4294    sp <ThreadBase> strongMe = this;
4295    status_t status = NO_ERROR;
4296    {
4297        AutoMutex lock(&mLock);
4298        if (mActiveTrack != 0) {
4299            if (recordTrack != mActiveTrack.get()) {
4300                status = -EBUSY;
4301            } else if (mActiveTrack->mState == TrackBase::PAUSING) {
4302                mActiveTrack->mState = TrackBase::ACTIVE;
4303            }
4304            return status;
4305        }
4306
4307        recordTrack->mState = TrackBase::IDLE;
4308        mActiveTrack = recordTrack;
4309        mLock.unlock();
4310        status_t status = AudioSystem::startInput(mId);
4311        mLock.lock();
4312        if (status != NO_ERROR) {
4313            mActiveTrack.clear();
4314            return status;
4315        }
4316        mRsmpInIndex = mFrameCount;
4317        mBytesRead = 0;
4318        if (mResampler != NULL) {
4319            mResampler->reset();
4320        }
4321        mActiveTrack->mState = TrackBase::RESUMING;
4322        // signal thread to start
4323        LOGV("Signal record thread");
4324        mWaitWorkCV.signal();
4325        // do not wait for mStartStopCond if exiting
4326        if (mExiting) {
4327            mActiveTrack.clear();
4328            status = INVALID_OPERATION;
4329            goto startError;
4330        }
4331        mStartStopCond.wait(mLock);
4332        if (mActiveTrack == 0) {
4333            LOGV("Record failed to start");
4334            status = BAD_VALUE;
4335            goto startError;
4336        }
4337        LOGV("Record started OK");
4338        return status;
4339    }
4340startError:
4341    AudioSystem::stopInput(mId);
4342    return status;
4343}
4344
4345void AudioFlinger::RecordThread::stop(RecordThread::RecordTrack* recordTrack) {
4346    LOGV("RecordThread::stop");
4347    sp <ThreadBase> strongMe = this;
4348    {
4349        AutoMutex lock(&mLock);
4350        if (mActiveTrack != 0 && recordTrack == mActiveTrack.get()) {
4351            mActiveTrack->mState = TrackBase::PAUSING;
4352            // do not wait for mStartStopCond if exiting
4353            if (mExiting) {
4354                return;
4355            }
4356            mStartStopCond.wait(mLock);
4357            // if we have been restarted, recordTrack == mActiveTrack.get() here
4358            if (mActiveTrack == 0 || recordTrack != mActiveTrack.get()) {
4359                mLock.unlock();
4360                AudioSystem::stopInput(mId);
4361                mLock.lock();
4362                LOGV("Record stopped OK");
4363            }
4364        }
4365    }
4366}
4367
4368status_t AudioFlinger::RecordThread::dump(int fd, const Vector<String16>& args)
4369{
4370    const size_t SIZE = 256;
4371    char buffer[SIZE];
4372    String8 result;
4373    pid_t pid = 0;
4374
4375    snprintf(buffer, SIZE, "\nInput thread %p internals\n", this);
4376    result.append(buffer);
4377
4378    if (mActiveTrack != 0) {
4379        result.append("Active Track:\n");
4380        result.append("   Clien Fmt Chn mask   Session Buf  S SRate  Serv     User\n");
4381        mActiveTrack->dump(buffer, SIZE);
4382        result.append(buffer);
4383
4384        snprintf(buffer, SIZE, "In index: %d\n", mRsmpInIndex);
4385        result.append(buffer);
4386        snprintf(buffer, SIZE, "In size: %d\n", mInputBytes);
4387        result.append(buffer);
4388        snprintf(buffer, SIZE, "Resampling: %d\n", (mResampler != 0));
4389        result.append(buffer);
4390        snprintf(buffer, SIZE, "Out channel count: %d\n", mReqChannelCount);
4391        result.append(buffer);
4392        snprintf(buffer, SIZE, "Out sample rate: %d\n", mReqSampleRate);
4393        result.append(buffer);
4394
4395
4396    } else {
4397        result.append("No record client\n");
4398    }
4399    write(fd, result.string(), result.size());
4400
4401    dumpBase(fd, args);
4402    dumpEffectChains(fd, args);
4403
4404    return NO_ERROR;
4405}
4406
4407status_t AudioFlinger::RecordThread::getNextBuffer(AudioBufferProvider::Buffer* buffer)
4408{
4409    size_t framesReq = buffer->frameCount;
4410    size_t framesReady = mFrameCount - mRsmpInIndex;
4411    int channelCount;
4412
4413    if (framesReady == 0) {
4414        mBytesRead = mInput->stream->read(mInput->stream, mRsmpInBuffer, mInputBytes);
4415        if (mBytesRead < 0) {
4416            LOGE("RecordThread::getNextBuffer() Error reading audio input");
4417            if (mActiveTrack->mState == TrackBase::ACTIVE) {
4418                // Force input into standby so that it tries to
4419                // recover at next read attempt
4420                mInput->stream->common.standby(&mInput->stream->common);
4421                usleep(kRecordThreadSleepUs);
4422            }
4423            buffer->raw = 0;
4424            buffer->frameCount = 0;
4425            return NOT_ENOUGH_DATA;
4426        }
4427        mRsmpInIndex = 0;
4428        framesReady = mFrameCount;
4429    }
4430
4431    if (framesReq > framesReady) {
4432        framesReq = framesReady;
4433    }
4434
4435    if (mChannelCount == 1 && mReqChannelCount == 2) {
4436        channelCount = 1;
4437    } else {
4438        channelCount = 2;
4439    }
4440    buffer->raw = mRsmpInBuffer + mRsmpInIndex * channelCount;
4441    buffer->frameCount = framesReq;
4442    return NO_ERROR;
4443}
4444
4445void AudioFlinger::RecordThread::releaseBuffer(AudioBufferProvider::Buffer* buffer)
4446{
4447    mRsmpInIndex += buffer->frameCount;
4448    buffer->frameCount = 0;
4449}
4450
4451bool AudioFlinger::RecordThread::checkForNewParameters_l()
4452{
4453    bool reconfig = false;
4454
4455    while (!mNewParameters.isEmpty()) {
4456        status_t status = NO_ERROR;
4457        String8 keyValuePair = mNewParameters[0];
4458        AudioParameter param = AudioParameter(keyValuePair);
4459        int value;
4460        int reqFormat = mFormat;
4461        int reqSamplingRate = mReqSampleRate;
4462        int reqChannelCount = mReqChannelCount;
4463
4464        if (param.getInt(String8(AudioParameter::keySamplingRate), value) == NO_ERROR) {
4465            reqSamplingRate = value;
4466            reconfig = true;
4467        }
4468        if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
4469            reqFormat = value;
4470            reconfig = true;
4471        }
4472        if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
4473            reqChannelCount = popcount(value);
4474            reconfig = true;
4475        }
4476        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
4477            // do not accept frame count changes if tracks are open as the track buffer
4478            // size depends on frame count and correct behavior would not be garantied
4479            // if frame count is changed after track creation
4480            if (mActiveTrack != 0) {
4481                status = INVALID_OPERATION;
4482            } else {
4483                reconfig = true;
4484            }
4485        }
4486        if (param.getInt(String8(AudioParameter::keyRouting), value) == NO_ERROR) {
4487            // forward device change to effects that have requested to be
4488            // aware of attached audio device.
4489            for (size_t i = 0; i < mEffectChains.size(); i++) {
4490                mEffectChains[i]->setDevice_l(value);
4491            }
4492            // store input device and output device but do not forward output device to audio HAL.
4493            // Note that status is ignored by the caller for output device
4494            // (see AudioFlinger::setParameters()
4495            if (value & AUDIO_DEVICE_OUT_ALL) {
4496                mDevice &= (uint32_t)~(value & AUDIO_DEVICE_OUT_ALL);
4497                status = BAD_VALUE;
4498            } else {
4499                mDevice &= (uint32_t)~(value & AUDIO_DEVICE_IN_ALL);
4500            }
4501            mDevice |= (uint32_t)value;
4502        }
4503        if (status == NO_ERROR) {
4504            status = mInput->stream->common.set_parameters(&mInput->stream->common, keyValuePair.string());
4505            if (status == INVALID_OPERATION) {
4506               mInput->stream->common.standby(&mInput->stream->common);
4507               status = mInput->stream->common.set_parameters(&mInput->stream->common, keyValuePair.string());
4508            }
4509            if (reconfig) {
4510                if (status == BAD_VALUE &&
4511                    reqFormat == mInput->stream->common.get_format(&mInput->stream->common) &&
4512                    reqFormat == AUDIO_FORMAT_PCM_16_BIT &&
4513                    ((int)mInput->stream->common.get_sample_rate(&mInput->stream->common) <= (2 * reqSamplingRate)) &&
4514                    (popcount(mInput->stream->common.get_channels(&mInput->stream->common)) < 3) &&
4515                    (reqChannelCount < 3)) {
4516                    status = NO_ERROR;
4517                }
4518                if (status == NO_ERROR) {
4519                    readInputParameters();
4520                    sendConfigEvent_l(AudioSystem::INPUT_CONFIG_CHANGED);
4521                }
4522            }
4523        }
4524
4525        mNewParameters.removeAt(0);
4526
4527        mParamStatus = status;
4528        mParamCond.signal();
4529        mWaitWorkCV.wait(mLock);
4530    }
4531    return reconfig;
4532}
4533
4534String8 AudioFlinger::RecordThread::getParameters(const String8& keys)
4535{
4536    char *s;
4537    String8 out_s8;
4538
4539    s = mInput->stream->common.get_parameters(&mInput->stream->common, keys.string());
4540    out_s8 = String8(s);
4541    free(s);
4542    return out_s8;
4543}
4544
4545void AudioFlinger::RecordThread::audioConfigChanged_l(int event, int param) {
4546    AudioSystem::OutputDescriptor desc;
4547    void *param2 = 0;
4548
4549    switch (event) {
4550    case AudioSystem::INPUT_OPENED:
4551    case AudioSystem::INPUT_CONFIG_CHANGED:
4552        desc.channels = mChannelMask;
4553        desc.samplingRate = mSampleRate;
4554        desc.format = mFormat;
4555        desc.frameCount = mFrameCount;
4556        desc.latency = 0;
4557        param2 = &desc;
4558        break;
4559
4560    case AudioSystem::INPUT_CLOSED:
4561    default:
4562        break;
4563    }
4564    mAudioFlinger->audioConfigChanged_l(event, mId, param2);
4565}
4566
4567void AudioFlinger::RecordThread::readInputParameters()
4568{
4569    if (mRsmpInBuffer) delete mRsmpInBuffer;
4570    if (mRsmpOutBuffer) delete mRsmpOutBuffer;
4571    if (mResampler) delete mResampler;
4572    mResampler = 0;
4573
4574    mSampleRate = mInput->stream->common.get_sample_rate(&mInput->stream->common);
4575    mChannelMask = mInput->stream->common.get_channels(&mInput->stream->common);
4576    mChannelCount = (uint16_t)popcount(mChannelMask);
4577    mFormat = mInput->stream->common.get_format(&mInput->stream->common);
4578    mFrameSize = (uint16_t)audio_stream_frame_size(&mInput->stream->common);
4579    mInputBytes = mInput->stream->common.get_buffer_size(&mInput->stream->common);
4580    mFrameCount = mInputBytes / mFrameSize;
4581    mRsmpInBuffer = new int16_t[mFrameCount * mChannelCount];
4582
4583    if (mSampleRate != mReqSampleRate && mChannelCount < 3 && mReqChannelCount < 3)
4584    {
4585        int channelCount;
4586         // optmization: if mono to mono, use the resampler in stereo to stereo mode to avoid
4587         // stereo to mono post process as the resampler always outputs stereo.
4588        if (mChannelCount == 1 && mReqChannelCount == 2) {
4589            channelCount = 1;
4590        } else {
4591            channelCount = 2;
4592        }
4593        mResampler = AudioResampler::create(16, channelCount, mReqSampleRate);
4594        mResampler->setSampleRate(mSampleRate);
4595        mResampler->setVolume(AudioMixer::UNITY_GAIN, AudioMixer::UNITY_GAIN);
4596        mRsmpOutBuffer = new int32_t[mFrameCount * 2];
4597
4598        // optmization: if mono to mono, alter input frame count as if we were inputing stereo samples
4599        if (mChannelCount == 1 && mReqChannelCount == 1) {
4600            mFrameCount >>= 1;
4601        }
4602
4603    }
4604    mRsmpInIndex = mFrameCount;
4605}
4606
4607unsigned int AudioFlinger::RecordThread::getInputFramesLost()
4608{
4609    return mInput->stream->get_input_frames_lost(mInput->stream);
4610}
4611
4612uint32_t AudioFlinger::RecordThread::hasAudioSession(int sessionId)
4613{
4614    Mutex::Autolock _l(mLock);
4615    uint32_t result = 0;
4616    if (getEffectChain_l(sessionId) != 0) {
4617        result = EFFECT_SESSION;
4618    }
4619
4620    if (mTrack != NULL && sessionId == mTrack->sessionId()) {
4621        result |= TRACK_SESSION;
4622    }
4623
4624    return result;
4625}
4626
4627// ----------------------------------------------------------------------------
4628
4629int AudioFlinger::openOutput(uint32_t *pDevices,
4630                                uint32_t *pSamplingRate,
4631                                uint32_t *pFormat,
4632                                uint32_t *pChannels,
4633                                uint32_t *pLatencyMs,
4634                                uint32_t flags)
4635{
4636    status_t status;
4637    PlaybackThread *thread = NULL;
4638    mHardwareStatus = AUDIO_HW_OUTPUT_OPEN;
4639    uint32_t samplingRate = pSamplingRate ? *pSamplingRate : 0;
4640    uint32_t format = pFormat ? *pFormat : 0;
4641    uint32_t channels = pChannels ? *pChannels : 0;
4642    uint32_t latency = pLatencyMs ? *pLatencyMs : 0;
4643    audio_stream_out_t *outStream;
4644    audio_hw_device_t *outHwDev;
4645
4646    LOGV("openOutput(), Device %x, SamplingRate %d, Format %d, Channels %x, flags %x",
4647            pDevices ? *pDevices : 0,
4648            samplingRate,
4649            format,
4650            channels,
4651            flags);
4652
4653    if (pDevices == NULL || *pDevices == 0) {
4654        return 0;
4655    }
4656
4657    Mutex::Autolock _l(mLock);
4658
4659    outHwDev = findSuitableHwDev_l(*pDevices);
4660    if (outHwDev == NULL)
4661        return 0;
4662
4663    status = outHwDev->open_output_stream(outHwDev, *pDevices, (int *)&format,
4664                                          &channels, &samplingRate, &outStream);
4665    LOGV("openOutput() openOutputStream returned output %p, SamplingRate %d, Format %d, Channels %x, status %d",
4666            outStream,
4667            samplingRate,
4668            format,
4669            channels,
4670            status);
4671
4672    mHardwareStatus = AUDIO_HW_IDLE;
4673    if (outStream != NULL) {
4674        AudioStreamOut *output = new AudioStreamOut(outHwDev, outStream);
4675        int id = nextUniqueId();
4676
4677        if ((flags & AUDIO_POLICY_OUTPUT_FLAG_DIRECT) ||
4678            (format != AUDIO_FORMAT_PCM_16_BIT) ||
4679            (channels != AUDIO_CHANNEL_OUT_STEREO)) {
4680            thread = new DirectOutputThread(this, output, id, *pDevices);
4681            LOGV("openOutput() created direct output: ID %d thread %p", id, thread);
4682        } else {
4683            thread = new MixerThread(this, output, id, *pDevices);
4684            LOGV("openOutput() created mixer output: ID %d thread %p", id, thread);
4685        }
4686        mPlaybackThreads.add(id, thread);
4687
4688        if (pSamplingRate) *pSamplingRate = samplingRate;
4689        if (pFormat) *pFormat = format;
4690        if (pChannels) *pChannels = channels;
4691        if (pLatencyMs) *pLatencyMs = thread->latency();
4692
4693        // notify client processes of the new output creation
4694        thread->audioConfigChanged_l(AudioSystem::OUTPUT_OPENED);
4695        return id;
4696    }
4697
4698    return 0;
4699}
4700
4701int AudioFlinger::openDuplicateOutput(int output1, int output2)
4702{
4703    Mutex::Autolock _l(mLock);
4704    MixerThread *thread1 = checkMixerThread_l(output1);
4705    MixerThread *thread2 = checkMixerThread_l(output2);
4706
4707    if (thread1 == NULL || thread2 == NULL) {
4708        LOGW("openDuplicateOutput() wrong output mixer type for output %d or %d", output1, output2);
4709        return 0;
4710    }
4711
4712    int id = nextUniqueId();
4713    DuplicatingThread *thread = new DuplicatingThread(this, thread1, id);
4714    thread->addOutputTrack(thread2);
4715    mPlaybackThreads.add(id, thread);
4716    // notify client processes of the new output creation
4717    thread->audioConfigChanged_l(AudioSystem::OUTPUT_OPENED);
4718    return id;
4719}
4720
4721status_t AudioFlinger::closeOutput(int output)
4722{
4723    // keep strong reference on the playback thread so that
4724    // it is not destroyed while exit() is executed
4725    sp <PlaybackThread> thread;
4726    {
4727        Mutex::Autolock _l(mLock);
4728        thread = checkPlaybackThread_l(output);
4729        if (thread == NULL) {
4730            return BAD_VALUE;
4731        }
4732
4733        LOGV("closeOutput() %d", output);
4734
4735        if (thread->type() == ThreadBase::MIXER) {
4736            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4737                if (mPlaybackThreads.valueAt(i)->type() == ThreadBase::DUPLICATING) {
4738                    DuplicatingThread *dupThread = (DuplicatingThread *)mPlaybackThreads.valueAt(i).get();
4739                    dupThread->removeOutputTrack((MixerThread *)thread.get());
4740                }
4741            }
4742        }
4743        void *param2 = 0;
4744        audioConfigChanged_l(AudioSystem::OUTPUT_CLOSED, output, param2);
4745        mPlaybackThreads.removeItem(output);
4746    }
4747    thread->exit();
4748
4749    if (thread->type() != ThreadBase::DUPLICATING) {
4750        AudioStreamOut *out = thread->getOutput();
4751        out->hwDev->close_output_stream(out->hwDev, out->stream);
4752        delete out;
4753    }
4754    return NO_ERROR;
4755}
4756
4757status_t AudioFlinger::suspendOutput(int output)
4758{
4759    Mutex::Autolock _l(mLock);
4760    PlaybackThread *thread = checkPlaybackThread_l(output);
4761
4762    if (thread == NULL) {
4763        return BAD_VALUE;
4764    }
4765
4766    LOGV("suspendOutput() %d", output);
4767    thread->suspend();
4768
4769    return NO_ERROR;
4770}
4771
4772status_t AudioFlinger::restoreOutput(int output)
4773{
4774    Mutex::Autolock _l(mLock);
4775    PlaybackThread *thread = checkPlaybackThread_l(output);
4776
4777    if (thread == NULL) {
4778        return BAD_VALUE;
4779    }
4780
4781    LOGV("restoreOutput() %d", output);
4782
4783    thread->restore();
4784
4785    return NO_ERROR;
4786}
4787
4788int AudioFlinger::openInput(uint32_t *pDevices,
4789                                uint32_t *pSamplingRate,
4790                                uint32_t *pFormat,
4791                                uint32_t *pChannels,
4792                                uint32_t acoustics)
4793{
4794    status_t status;
4795    RecordThread *thread = NULL;
4796    uint32_t samplingRate = pSamplingRate ? *pSamplingRate : 0;
4797    uint32_t format = pFormat ? *pFormat : 0;
4798    uint32_t channels = pChannels ? *pChannels : 0;
4799    uint32_t reqSamplingRate = samplingRate;
4800    uint32_t reqFormat = format;
4801    uint32_t reqChannels = channels;
4802    audio_stream_in_t *inStream;
4803    audio_hw_device_t *inHwDev;
4804
4805    if (pDevices == NULL || *pDevices == 0) {
4806        return 0;
4807    }
4808
4809    Mutex::Autolock _l(mLock);
4810
4811    inHwDev = findSuitableHwDev_l(*pDevices);
4812    if (inHwDev == NULL)
4813        return 0;
4814
4815    status = inHwDev->open_input_stream(inHwDev, *pDevices, (int *)&format,
4816                                        &channels, &samplingRate,
4817                                        (audio_in_acoustics_t)acoustics,
4818                                        &inStream);
4819    LOGV("openInput() openInputStream returned input %p, SamplingRate %d, Format %d, Channels %x, acoustics %x, status %d",
4820            inStream,
4821            samplingRate,
4822            format,
4823            channels,
4824            acoustics,
4825            status);
4826
4827    // If the input could not be opened with the requested parameters and we can handle the conversion internally,
4828    // try to open again with the proposed parameters. The AudioFlinger can resample the input and do mono to stereo
4829    // or stereo to mono conversions on 16 bit PCM inputs.
4830    if (inStream == NULL && status == BAD_VALUE &&
4831        reqFormat == format && format == AUDIO_FORMAT_PCM_16_BIT &&
4832        (samplingRate <= 2 * reqSamplingRate) &&
4833        (popcount(channels) < 3) && (popcount(reqChannels) < 3)) {
4834        LOGV("openInput() reopening with proposed sampling rate and channels");
4835        status = inHwDev->open_input_stream(inHwDev, *pDevices, (int *)&format,
4836                                            &channels, &samplingRate,
4837                                            (audio_in_acoustics_t)acoustics,
4838                                            &inStream);
4839    }
4840
4841    if (inStream != NULL) {
4842        AudioStreamIn *input = new AudioStreamIn(inHwDev, inStream);
4843
4844        int id = nextUniqueId();
4845        // Start record thread
4846        // RecorThread require both input and output device indication to forward to audio
4847        // pre processing modules
4848        uint32_t device = (*pDevices) | primaryOutputDevice_l();
4849        thread = new RecordThread(this,
4850                                  input,
4851                                  reqSamplingRate,
4852                                  reqChannels,
4853                                  id,
4854                                  device);
4855        mRecordThreads.add(id, thread);
4856        LOGV("openInput() created record thread: ID %d thread %p", id, thread);
4857        if (pSamplingRate) *pSamplingRate = reqSamplingRate;
4858        if (pFormat) *pFormat = format;
4859        if (pChannels) *pChannels = reqChannels;
4860
4861        input->stream->common.standby(&input->stream->common);
4862
4863        // notify client processes of the new input creation
4864        thread->audioConfigChanged_l(AudioSystem::INPUT_OPENED);
4865        return id;
4866    }
4867
4868    return 0;
4869}
4870
4871status_t AudioFlinger::closeInput(int input)
4872{
4873    // keep strong reference on the record thread so that
4874    // it is not destroyed while exit() is executed
4875    sp <RecordThread> thread;
4876    {
4877        Mutex::Autolock _l(mLock);
4878        thread = checkRecordThread_l(input);
4879        if (thread == NULL) {
4880            return BAD_VALUE;
4881        }
4882
4883        LOGV("closeInput() %d", input);
4884        void *param2 = 0;
4885        audioConfigChanged_l(AudioSystem::INPUT_CLOSED, input, param2);
4886        mRecordThreads.removeItem(input);
4887    }
4888    thread->exit();
4889
4890    AudioStreamIn *in = thread->getInput();
4891    in->hwDev->close_input_stream(in->hwDev, in->stream);
4892    delete in;
4893
4894    return NO_ERROR;
4895}
4896
4897status_t AudioFlinger::setStreamOutput(uint32_t stream, int output)
4898{
4899    Mutex::Autolock _l(mLock);
4900    MixerThread *dstThread = checkMixerThread_l(output);
4901    if (dstThread == NULL) {
4902        LOGW("setStreamOutput() bad output id %d", output);
4903        return BAD_VALUE;
4904    }
4905
4906    LOGV("setStreamOutput() stream %d to output %d", stream, output);
4907    audioConfigChanged_l(AudioSystem::STREAM_CONFIG_CHANGED, output, &stream);
4908
4909    for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4910        PlaybackThread *thread = mPlaybackThreads.valueAt(i).get();
4911        if (thread != dstThread &&
4912            thread->type() != ThreadBase::DIRECT) {
4913            MixerThread *srcThread = (MixerThread *)thread;
4914            srcThread->invalidateTracks(stream);
4915        }
4916    }
4917
4918    return NO_ERROR;
4919}
4920
4921
4922int AudioFlinger::newAudioSessionId()
4923{
4924    return nextUniqueId();
4925}
4926
4927// checkPlaybackThread_l() must be called with AudioFlinger::mLock held
4928AudioFlinger::PlaybackThread *AudioFlinger::checkPlaybackThread_l(int output) const
4929{
4930    PlaybackThread *thread = NULL;
4931    if (mPlaybackThreads.indexOfKey(output) >= 0) {
4932        thread = (PlaybackThread *)mPlaybackThreads.valueFor(output).get();
4933    }
4934    return thread;
4935}
4936
4937// checkMixerThread_l() must be called with AudioFlinger::mLock held
4938AudioFlinger::MixerThread *AudioFlinger::checkMixerThread_l(int output) const
4939{
4940    PlaybackThread *thread = checkPlaybackThread_l(output);
4941    if (thread != NULL) {
4942        if (thread->type() == ThreadBase::DIRECT) {
4943            thread = NULL;
4944        }
4945    }
4946    return (MixerThread *)thread;
4947}
4948
4949// checkRecordThread_l() must be called with AudioFlinger::mLock held
4950AudioFlinger::RecordThread *AudioFlinger::checkRecordThread_l(int input) const
4951{
4952    RecordThread *thread = NULL;
4953    if (mRecordThreads.indexOfKey(input) >= 0) {
4954        thread = (RecordThread *)mRecordThreads.valueFor(input).get();
4955    }
4956    return thread;
4957}
4958
4959uint32_t AudioFlinger::nextUniqueId()
4960{
4961    return android_atomic_inc(&mNextUniqueId);
4962}
4963
4964AudioFlinger::PlaybackThread *AudioFlinger::primaryPlaybackThread_l()
4965{
4966    for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4967        PlaybackThread *thread = mPlaybackThreads.valueAt(i).get();
4968        if (thread->getOutput()->hwDev == mPrimaryHardwareDev) {
4969            return thread;
4970        }
4971    }
4972    return NULL;
4973}
4974
4975uint32_t AudioFlinger::primaryOutputDevice_l()
4976{
4977    PlaybackThread *thread = primaryPlaybackThread_l();
4978
4979    if (thread == NULL) {
4980        return 0;
4981    }
4982
4983    return thread->device();
4984}
4985
4986
4987// ----------------------------------------------------------------------------
4988//  Effect management
4989// ----------------------------------------------------------------------------
4990
4991
4992status_t AudioFlinger::queryNumberEffects(uint32_t *numEffects)
4993{
4994    Mutex::Autolock _l(mLock);
4995    return EffectQueryNumberEffects(numEffects);
4996}
4997
4998status_t AudioFlinger::queryEffect(uint32_t index, effect_descriptor_t *descriptor)
4999{
5000    Mutex::Autolock _l(mLock);
5001    return EffectQueryEffect(index, descriptor);
5002}
5003
5004status_t AudioFlinger::getEffectDescriptor(effect_uuid_t *pUuid, effect_descriptor_t *descriptor)
5005{
5006    Mutex::Autolock _l(mLock);
5007    return EffectGetDescriptor(pUuid, descriptor);
5008}
5009
5010
5011sp<IEffect> AudioFlinger::createEffect(pid_t pid,
5012        effect_descriptor_t *pDesc,
5013        const sp<IEffectClient>& effectClient,
5014        int32_t priority,
5015        int io,
5016        int sessionId,
5017        status_t *status,
5018        int *id,
5019        int *enabled)
5020{
5021    status_t lStatus = NO_ERROR;
5022    sp<EffectHandle> handle;
5023    effect_descriptor_t desc;
5024    sp<Client> client;
5025    wp<Client> wclient;
5026
5027    LOGV("createEffect pid %d, client %p, priority %d, sessionId %d, io %d",
5028            pid, effectClient.get(), priority, sessionId, io);
5029
5030    if (pDesc == NULL) {
5031        lStatus = BAD_VALUE;
5032        goto Exit;
5033    }
5034
5035    // check audio settings permission for global effects
5036    if (sessionId == AUDIO_SESSION_OUTPUT_MIX && !settingsAllowed()) {
5037        lStatus = PERMISSION_DENIED;
5038        goto Exit;
5039    }
5040
5041    // Session AUDIO_SESSION_OUTPUT_STAGE is reserved for output stage effects
5042    // that can only be created by audio policy manager (running in same process)
5043    if (sessionId == AUDIO_SESSION_OUTPUT_STAGE && getpid() != pid) {
5044        lStatus = PERMISSION_DENIED;
5045        goto Exit;
5046    }
5047
5048    if (io == 0) {
5049        if (sessionId == AUDIO_SESSION_OUTPUT_STAGE) {
5050            // output must be specified by AudioPolicyManager when using session
5051            // AUDIO_SESSION_OUTPUT_STAGE
5052            lStatus = BAD_VALUE;
5053            goto Exit;
5054        } else if (sessionId == AUDIO_SESSION_OUTPUT_MIX) {
5055            // if the output returned by getOutputForEffect() is removed before we lock the
5056            // mutex below, the call to checkPlaybackThread_l(io) below will detect it
5057            // and we will exit safely
5058            io = AudioSystem::getOutputForEffect(&desc);
5059        }
5060    }
5061
5062    {
5063        Mutex::Autolock _l(mLock);
5064
5065
5066        if (!EffectIsNullUuid(&pDesc->uuid)) {
5067            // if uuid is specified, request effect descriptor
5068            lStatus = EffectGetDescriptor(&pDesc->uuid, &desc);
5069            if (lStatus < 0) {
5070                LOGW("createEffect() error %d from EffectGetDescriptor", lStatus);
5071                goto Exit;
5072            }
5073        } else {
5074            // if uuid is not specified, look for an available implementation
5075            // of the required type in effect factory
5076            if (EffectIsNullUuid(&pDesc->type)) {
5077                LOGW("createEffect() no effect type");
5078                lStatus = BAD_VALUE;
5079                goto Exit;
5080            }
5081            uint32_t numEffects = 0;
5082            effect_descriptor_t d;
5083            bool found = false;
5084
5085            lStatus = EffectQueryNumberEffects(&numEffects);
5086            if (lStatus < 0) {
5087                LOGW("createEffect() error %d from EffectQueryNumberEffects", lStatus);
5088                goto Exit;
5089            }
5090            for (uint32_t i = 0; i < numEffects; i++) {
5091                lStatus = EffectQueryEffect(i, &desc);
5092                if (lStatus < 0) {
5093                    LOGW("createEffect() error %d from EffectQueryEffect", lStatus);
5094                    continue;
5095                }
5096                if (memcmp(&desc.type, &pDesc->type, sizeof(effect_uuid_t)) == 0) {
5097                    // If matching type found save effect descriptor. If the session is
5098                    // 0 and the effect is not auxiliary, continue enumeration in case
5099                    // an auxiliary version of this effect type is available
5100                    found = true;
5101                    memcpy(&d, &desc, sizeof(effect_descriptor_t));
5102                    if (sessionId != AUDIO_SESSION_OUTPUT_MIX ||
5103                            (desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5104                        break;
5105                    }
5106                }
5107            }
5108            if (!found) {
5109                lStatus = BAD_VALUE;
5110                LOGW("createEffect() effect not found");
5111                goto Exit;
5112            }
5113            // For same effect type, chose auxiliary version over insert version if
5114            // connect to output mix (Compliance to OpenSL ES)
5115            if (sessionId == AUDIO_SESSION_OUTPUT_MIX &&
5116                    (d.flags & EFFECT_FLAG_TYPE_MASK) != EFFECT_FLAG_TYPE_AUXILIARY) {
5117                memcpy(&desc, &d, sizeof(effect_descriptor_t));
5118            }
5119        }
5120
5121        // Do not allow auxiliary effects on a session different from 0 (output mix)
5122        if (sessionId != AUDIO_SESSION_OUTPUT_MIX &&
5123             (desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5124            lStatus = INVALID_OPERATION;
5125            goto Exit;
5126        }
5127
5128        // check recording permission for visualizer
5129        if ((memcmp(&desc.type, SL_IID_VISUALIZATION, sizeof(effect_uuid_t)) == 0) &&
5130            !recordingAllowed()) {
5131            lStatus = PERMISSION_DENIED;
5132            goto Exit;
5133        }
5134
5135        // return effect descriptor
5136        memcpy(pDesc, &desc, sizeof(effect_descriptor_t));
5137
5138        // If output is not specified try to find a matching audio session ID in one of the
5139        // output threads.
5140        // If output is 0 here, sessionId is neither SESSION_OUTPUT_STAGE nor SESSION_OUTPUT_MIX
5141        // because of code checking output when entering the function.
5142        // Note: io is never 0 when creating an effect on an input
5143        if (io == 0) {
5144             // look for the thread where the specified audio session is present
5145            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
5146                if (mPlaybackThreads.valueAt(i)->hasAudioSession(sessionId) != 0) {
5147                    io = mPlaybackThreads.keyAt(i);
5148                    break;
5149                }
5150            }
5151            if (io == 0) {
5152               for (size_t i = 0; i < mRecordThreads.size(); i++) {
5153                   if (mRecordThreads.valueAt(i)->hasAudioSession(sessionId) != 0) {
5154                       io = mRecordThreads.keyAt(i);
5155                       break;
5156                   }
5157               }
5158            }
5159            // If no output thread contains the requested session ID, default to
5160            // first output. The effect chain will be moved to the correct output
5161            // thread when a track with the same session ID is created
5162            if (io == 0 && mPlaybackThreads.size()) {
5163                io = mPlaybackThreads.keyAt(0);
5164            }
5165            LOGV("createEffect() got io %d for effect %s", io, desc.name);
5166        }
5167        ThreadBase *thread = checkRecordThread_l(io);
5168        if (thread == NULL) {
5169            thread = checkPlaybackThread_l(io);
5170            if (thread == NULL) {
5171                LOGE("createEffect() unknown output thread");
5172                lStatus = BAD_VALUE;
5173                goto Exit;
5174            }
5175        }
5176
5177        wclient = mClients.valueFor(pid);
5178
5179        if (wclient != NULL) {
5180            client = wclient.promote();
5181        } else {
5182            client = new Client(this, pid);
5183            mClients.add(pid, client);
5184        }
5185
5186        // create effect on selected output trhead
5187        handle = thread->createEffect_l(client, effectClient, priority, sessionId,
5188                &desc, enabled, &lStatus);
5189        if (handle != 0 && id != NULL) {
5190            *id = handle->id();
5191        }
5192    }
5193
5194Exit:
5195    if(status) {
5196        *status = lStatus;
5197    }
5198    return handle;
5199}
5200
5201status_t AudioFlinger::moveEffects(int sessionId, int srcOutput, int dstOutput)
5202{
5203    LOGV("moveEffects() session %d, srcOutput %d, dstOutput %d",
5204            sessionId, srcOutput, dstOutput);
5205    Mutex::Autolock _l(mLock);
5206    if (srcOutput == dstOutput) {
5207        LOGW("moveEffects() same dst and src outputs %d", dstOutput);
5208        return NO_ERROR;
5209    }
5210    PlaybackThread *srcThread = checkPlaybackThread_l(srcOutput);
5211    if (srcThread == NULL) {
5212        LOGW("moveEffects() bad srcOutput %d", srcOutput);
5213        return BAD_VALUE;
5214    }
5215    PlaybackThread *dstThread = checkPlaybackThread_l(dstOutput);
5216    if (dstThread == NULL) {
5217        LOGW("moveEffects() bad dstOutput %d", dstOutput);
5218        return BAD_VALUE;
5219    }
5220
5221    Mutex::Autolock _dl(dstThread->mLock);
5222    Mutex::Autolock _sl(srcThread->mLock);
5223    moveEffectChain_l(sessionId, srcThread, dstThread, false);
5224
5225    return NO_ERROR;
5226}
5227
5228// moveEffectChain_l mustbe called with both srcThread and dstThread mLocks held
5229status_t AudioFlinger::moveEffectChain_l(int sessionId,
5230                                   AudioFlinger::PlaybackThread *srcThread,
5231                                   AudioFlinger::PlaybackThread *dstThread,
5232                                   bool reRegister)
5233{
5234    LOGV("moveEffectChain_l() session %d from thread %p to thread %p",
5235            sessionId, srcThread, dstThread);
5236
5237    sp<EffectChain> chain = srcThread->getEffectChain_l(sessionId);
5238    if (chain == 0) {
5239        LOGW("moveEffectChain_l() effect chain for session %d not on source thread %p",
5240                sessionId, srcThread);
5241        return INVALID_OPERATION;
5242    }
5243
5244    // remove chain first. This is useful only if reconfiguring effect chain on same output thread,
5245    // so that a new chain is created with correct parameters when first effect is added. This is
5246    // otherwise unecessary as removeEffect_l() will remove the chain when last effect is
5247    // removed.
5248    srcThread->removeEffectChain_l(chain);
5249
5250    // transfer all effects one by one so that new effect chain is created on new thread with
5251    // correct buffer sizes and audio parameters and effect engines reconfigured accordingly
5252    int dstOutput = dstThread->id();
5253    sp<EffectChain> dstChain;
5254    uint32_t strategy;
5255    sp<EffectModule> effect = chain->getEffectFromId_l(0);
5256    while (effect != 0) {
5257        srcThread->removeEffect_l(effect);
5258        dstThread->addEffect_l(effect);
5259        // if the move request is not received from audio policy manager, the effect must be
5260        // re-registered with the new strategy and output
5261        if (dstChain == 0) {
5262            dstChain = effect->chain().promote();
5263            if (dstChain == 0) {
5264                LOGW("moveEffectChain_l() cannot get chain from effect %p", effect.get());
5265                srcThread->addEffect_l(effect);
5266                return NO_INIT;
5267            }
5268            strategy = dstChain->strategy();
5269        }
5270        if (reRegister) {
5271            AudioSystem::unregisterEffect(effect->id());
5272            AudioSystem::registerEffect(&effect->desc(),
5273                                        dstOutput,
5274                                        strategy,
5275                                        sessionId,
5276                                        effect->id());
5277        }
5278        effect = chain->getEffectFromId_l(0);
5279    }
5280
5281    return NO_ERROR;
5282}
5283
5284
5285// PlaybackThread::createEffect_l() must be called with AudioFlinger::mLock held
5286sp<AudioFlinger::EffectHandle> AudioFlinger::ThreadBase::createEffect_l(
5287        const sp<AudioFlinger::Client>& client,
5288        const sp<IEffectClient>& effectClient,
5289        int32_t priority,
5290        int sessionId,
5291        effect_descriptor_t *desc,
5292        int *enabled,
5293        status_t *status
5294        )
5295{
5296    sp<EffectModule> effect;
5297    sp<EffectHandle> handle;
5298    status_t lStatus;
5299    sp<EffectChain> chain;
5300    bool chainCreated = false;
5301    bool effectCreated = false;
5302    bool effectRegistered = false;
5303
5304    lStatus = initCheck();
5305    if (lStatus != NO_ERROR) {
5306        LOGW("createEffect_l() Audio driver not initialized.");
5307        goto Exit;
5308    }
5309
5310    // Do not allow effects with session ID 0 on direct output or duplicating threads
5311    // TODO: add rule for hw accelerated effects on direct outputs with non PCM format
5312    if (sessionId == AUDIO_SESSION_OUTPUT_MIX && mType != MIXER) {
5313        LOGW("createEffect_l() Cannot add auxiliary effect %s to session %d",
5314                desc->name, sessionId);
5315        lStatus = BAD_VALUE;
5316        goto Exit;
5317    }
5318    // Only Pre processor effects are allowed on input threads and only on input threads
5319    if ((mType == RECORD &&
5320            (desc->flags & EFFECT_FLAG_TYPE_MASK) != EFFECT_FLAG_TYPE_PRE_PROC) ||
5321            (mType != RECORD &&
5322                    (desc->flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC)) {
5323        LOGW("createEffect_l() effect %s (flags %08x) created on wrong thread type %d",
5324                desc->name, desc->flags, mType);
5325        lStatus = BAD_VALUE;
5326        goto Exit;
5327    }
5328
5329    LOGV("createEffect_l() thread %p effect %s on session %d", this, desc->name, sessionId);
5330
5331    { // scope for mLock
5332        Mutex::Autolock _l(mLock);
5333
5334        // check for existing effect chain with the requested audio session
5335        chain = getEffectChain_l(sessionId);
5336        if (chain == 0) {
5337            // create a new chain for this session
5338            LOGV("createEffect_l() new effect chain for session %d", sessionId);
5339            chain = new EffectChain(this, sessionId);
5340            addEffectChain_l(chain);
5341            chain->setStrategy(getStrategyForSession_l(sessionId));
5342            chainCreated = true;
5343        } else {
5344            effect = chain->getEffectFromDesc_l(desc);
5345        }
5346
5347        LOGV("createEffect_l() got effect %p on chain %p", effect == 0 ? 0 : effect.get(), chain.get());
5348
5349        if (effect == 0) {
5350            int id = mAudioFlinger->nextUniqueId();
5351            // Check CPU and memory usage
5352            lStatus = AudioSystem::registerEffect(desc, mId, chain->strategy(), sessionId, id);
5353            if (lStatus != NO_ERROR) {
5354                goto Exit;
5355            }
5356            effectRegistered = true;
5357            // create a new effect module if none present in the chain
5358            effect = new EffectModule(this, chain, desc, id, sessionId);
5359            lStatus = effect->status();
5360            if (lStatus != NO_ERROR) {
5361                goto Exit;
5362            }
5363            lStatus = chain->addEffect_l(effect);
5364            if (lStatus != NO_ERROR) {
5365                goto Exit;
5366            }
5367            effectCreated = true;
5368
5369            effect->setDevice(mDevice);
5370            effect->setMode(mAudioFlinger->getMode());
5371        }
5372        // create effect handle and connect it to effect module
5373        handle = new EffectHandle(effect, client, effectClient, priority);
5374        lStatus = effect->addHandle(handle);
5375        if (enabled) {
5376            *enabled = (int)effect->isEnabled();
5377        }
5378    }
5379
5380Exit:
5381    if (lStatus != NO_ERROR && lStatus != ALREADY_EXISTS) {
5382        Mutex::Autolock _l(mLock);
5383        if (effectCreated) {
5384            chain->removeEffect_l(effect);
5385        }
5386        if (effectRegistered) {
5387            AudioSystem::unregisterEffect(effect->id());
5388        }
5389        if (chainCreated) {
5390            removeEffectChain_l(chain);
5391        }
5392        handle.clear();
5393    }
5394
5395    if(status) {
5396        *status = lStatus;
5397    }
5398    return handle;
5399}
5400
5401sp<AudioFlinger::EffectModule> AudioFlinger::ThreadBase::getEffect_l(int sessionId, int effectId)
5402{
5403    sp<EffectModule> effect;
5404
5405    sp<EffectChain> chain = getEffectChain_l(sessionId);
5406    if (chain != 0) {
5407        effect = chain->getEffectFromId_l(effectId);
5408    }
5409    return effect;
5410}
5411
5412// PlaybackThread::addEffect_l() must be called with AudioFlinger::mLock and
5413// PlaybackThread::mLock held
5414status_t AudioFlinger::ThreadBase::addEffect_l(const sp<EffectModule>& effect)
5415{
5416    // check for existing effect chain with the requested audio session
5417    int sessionId = effect->sessionId();
5418    sp<EffectChain> chain = getEffectChain_l(sessionId);
5419    bool chainCreated = false;
5420
5421    if (chain == 0) {
5422        // create a new chain for this session
5423        LOGV("addEffect_l() new effect chain for session %d", sessionId);
5424        chain = new EffectChain(this, sessionId);
5425        addEffectChain_l(chain);
5426        chain->setStrategy(getStrategyForSession_l(sessionId));
5427        chainCreated = true;
5428    }
5429    LOGV("addEffect_l() %p chain %p effect %p", this, chain.get(), effect.get());
5430
5431    if (chain->getEffectFromId_l(effect->id()) != 0) {
5432        LOGW("addEffect_l() %p effect %s already present in chain %p",
5433                this, effect->desc().name, chain.get());
5434        return BAD_VALUE;
5435    }
5436
5437    status_t status = chain->addEffect_l(effect);
5438    if (status != NO_ERROR) {
5439        if (chainCreated) {
5440            removeEffectChain_l(chain);
5441        }
5442        return status;
5443    }
5444
5445    effect->setDevice(mDevice);
5446    effect->setMode(mAudioFlinger->getMode());
5447    return NO_ERROR;
5448}
5449
5450void AudioFlinger::ThreadBase::removeEffect_l(const sp<EffectModule>& effect) {
5451
5452    LOGV("removeEffect_l() %p effect %p", this, effect.get());
5453    effect_descriptor_t desc = effect->desc();
5454    if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5455        detachAuxEffect_l(effect->id());
5456    }
5457
5458    sp<EffectChain> chain = effect->chain().promote();
5459    if (chain != 0) {
5460        // remove effect chain if removing last effect
5461        if (chain->removeEffect_l(effect) == 0) {
5462            removeEffectChain_l(chain);
5463        }
5464    } else {
5465        LOGW("removeEffect_l() %p cannot promote chain for effect %p", this, effect.get());
5466    }
5467}
5468
5469void AudioFlinger::ThreadBase::lockEffectChains_l(
5470        Vector<sp <AudioFlinger::EffectChain> >& effectChains)
5471{
5472    effectChains = mEffectChains;
5473    for (size_t i = 0; i < mEffectChains.size(); i++) {
5474        mEffectChains[i]->lock();
5475    }
5476}
5477
5478void AudioFlinger::ThreadBase::unlockEffectChains(
5479        Vector<sp <AudioFlinger::EffectChain> >& effectChains)
5480{
5481    for (size_t i = 0; i < effectChains.size(); i++) {
5482        effectChains[i]->unlock();
5483    }
5484}
5485
5486sp<AudioFlinger::EffectChain> AudioFlinger::ThreadBase::getEffectChain(int sessionId)
5487{
5488    Mutex::Autolock _l(mLock);
5489    return getEffectChain_l(sessionId);
5490}
5491
5492sp<AudioFlinger::EffectChain> AudioFlinger::ThreadBase::getEffectChain_l(int sessionId)
5493{
5494    sp<EffectChain> chain;
5495
5496    size_t size = mEffectChains.size();
5497    for (size_t i = 0; i < size; i++) {
5498        if (mEffectChains[i]->sessionId() == sessionId) {
5499            chain = mEffectChains[i];
5500            break;
5501        }
5502    }
5503    return chain;
5504}
5505
5506void AudioFlinger::ThreadBase::setMode(uint32_t mode)
5507{
5508    Mutex::Autolock _l(mLock);
5509    size_t size = mEffectChains.size();
5510    for (size_t i = 0; i < size; i++) {
5511        mEffectChains[i]->setMode_l(mode);
5512    }
5513}
5514
5515void AudioFlinger::ThreadBase::disconnectEffect(const sp<EffectModule>& effect,
5516                                                    const wp<EffectHandle>& handle) {
5517
5518    Mutex::Autolock _l(mLock);
5519    LOGV("disconnectEffect() %p effect %p", this, effect.get());
5520    // delete the effect module if removing last handle on it
5521    if (effect->removeHandle(handle) == 0) {
5522        removeEffect_l(effect);
5523        AudioSystem::unregisterEffect(effect->id());
5524    }
5525}
5526
5527status_t AudioFlinger::PlaybackThread::addEffectChain_l(const sp<EffectChain>& chain)
5528{
5529    int session = chain->sessionId();
5530    int16_t *buffer = mMixBuffer;
5531    bool ownsBuffer = false;
5532
5533    LOGV("addEffectChain_l() %p on thread %p for session %d", chain.get(), this, session);
5534    if (session > 0) {
5535        // Only one effect chain can be present in direct output thread and it uses
5536        // the mix buffer as input
5537        if (mType != DIRECT) {
5538            size_t numSamples = mFrameCount * mChannelCount;
5539            buffer = new int16_t[numSamples];
5540            memset(buffer, 0, numSamples * sizeof(int16_t));
5541            LOGV("addEffectChain_l() creating new input buffer %p session %d", buffer, session);
5542            ownsBuffer = true;
5543        }
5544
5545        // Attach all tracks with same session ID to this chain.
5546        for (size_t i = 0; i < mTracks.size(); ++i) {
5547            sp<Track> track = mTracks[i];
5548            if (session == track->sessionId()) {
5549                LOGV("addEffectChain_l() track->setMainBuffer track %p buffer %p", track.get(), buffer);
5550                track->setMainBuffer(buffer);
5551                chain->incTrackCnt();
5552            }
5553        }
5554
5555        // indicate all active tracks in the chain
5556        for (size_t i = 0 ; i < mActiveTracks.size() ; ++i) {
5557            sp<Track> track = mActiveTracks[i].promote();
5558            if (track == 0) continue;
5559            if (session == track->sessionId()) {
5560                LOGV("addEffectChain_l() activating track %p on session %d", track.get(), session);
5561                chain->incActiveTrackCnt();
5562            }
5563        }
5564    }
5565
5566    chain->setInBuffer(buffer, ownsBuffer);
5567    chain->setOutBuffer(mMixBuffer);
5568    // Effect chain for session AUDIO_SESSION_OUTPUT_STAGE is inserted at end of effect
5569    // chains list in order to be processed last as it contains output stage effects
5570    // Effect chain for session AUDIO_SESSION_OUTPUT_MIX is inserted before
5571    // session AUDIO_SESSION_OUTPUT_STAGE to be processed
5572    // after track specific effects and before output stage
5573    // It is therefore mandatory that AUDIO_SESSION_OUTPUT_MIX == 0 and
5574    // that AUDIO_SESSION_OUTPUT_STAGE < AUDIO_SESSION_OUTPUT_MIX
5575    // Effect chain for other sessions are inserted at beginning of effect
5576    // chains list to be processed before output mix effects. Relative order between other
5577    // sessions is not important
5578    size_t size = mEffectChains.size();
5579    size_t i = 0;
5580    for (i = 0; i < size; i++) {
5581        if (mEffectChains[i]->sessionId() < session) break;
5582    }
5583    mEffectChains.insertAt(chain, i);
5584    checkSuspendOnAddEffectChain_l(chain);
5585
5586    return NO_ERROR;
5587}
5588
5589size_t AudioFlinger::PlaybackThread::removeEffectChain_l(const sp<EffectChain>& chain)
5590{
5591    int session = chain->sessionId();
5592
5593    LOGV("removeEffectChain_l() %p from thread %p for session %d", chain.get(), this, session);
5594
5595    for (size_t i = 0; i < mEffectChains.size(); i++) {
5596        if (chain == mEffectChains[i]) {
5597            updateSuspendedSessionsOnRemoveEffectChain_l(chain);
5598            mEffectChains.removeAt(i);
5599            // detach all active tracks from the chain
5600            for (size_t i = 0 ; i < mActiveTracks.size() ; ++i) {
5601                sp<Track> track = mActiveTracks[i].promote();
5602                if (track == 0) continue;
5603                if (session == track->sessionId()) {
5604                    LOGV("removeEffectChain_l(): stopping track on chain %p for session Id: %d",
5605                            chain.get(), session);
5606                    chain->decActiveTrackCnt();
5607                }
5608            }
5609
5610            // detach all tracks with same session ID from this chain
5611            for (size_t i = 0; i < mTracks.size(); ++i) {
5612                sp<Track> track = mTracks[i];
5613                if (session == track->sessionId()) {
5614                    track->setMainBuffer(mMixBuffer);
5615                    chain->decTrackCnt();
5616                }
5617            }
5618            break;
5619        }
5620    }
5621    return mEffectChains.size();
5622}
5623
5624status_t AudioFlinger::PlaybackThread::attachAuxEffect(
5625        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
5626{
5627    Mutex::Autolock _l(mLock);
5628    return attachAuxEffect_l(track, EffectId);
5629}
5630
5631status_t AudioFlinger::PlaybackThread::attachAuxEffect_l(
5632        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
5633{
5634    status_t status = NO_ERROR;
5635
5636    if (EffectId == 0) {
5637        track->setAuxBuffer(0, NULL);
5638    } else {
5639        // Auxiliary effects are always in audio session AUDIO_SESSION_OUTPUT_MIX
5640        sp<EffectModule> effect = getEffect_l(AUDIO_SESSION_OUTPUT_MIX, EffectId);
5641        if (effect != 0) {
5642            if ((effect->desc().flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5643                track->setAuxBuffer(EffectId, (int32_t *)effect->inBuffer());
5644            } else {
5645                status = INVALID_OPERATION;
5646            }
5647        } else {
5648            status = BAD_VALUE;
5649        }
5650    }
5651    return status;
5652}
5653
5654void AudioFlinger::PlaybackThread::detachAuxEffect_l(int effectId)
5655{
5656     for (size_t i = 0; i < mTracks.size(); ++i) {
5657        sp<Track> track = mTracks[i];
5658        if (track->auxEffectId() == effectId) {
5659            attachAuxEffect_l(track, 0);
5660        }
5661    }
5662}
5663
5664status_t AudioFlinger::RecordThread::addEffectChain_l(const sp<EffectChain>& chain)
5665{
5666    // only one chain per input thread
5667    if (mEffectChains.size() != 0) {
5668        return INVALID_OPERATION;
5669    }
5670    LOGV("addEffectChain_l() %p on thread %p", chain.get(), this);
5671
5672    chain->setInBuffer(NULL);
5673    chain->setOutBuffer(NULL);
5674
5675    checkSuspendOnAddEffectChain_l(chain);
5676
5677    mEffectChains.add(chain);
5678
5679    return NO_ERROR;
5680}
5681
5682size_t AudioFlinger::RecordThread::removeEffectChain_l(const sp<EffectChain>& chain)
5683{
5684    LOGV("removeEffectChain_l() %p from thread %p", chain.get(), this);
5685    LOGW_IF(mEffectChains.size() != 1,
5686            "removeEffectChain_l() %p invalid chain size %d on thread %p",
5687            chain.get(), mEffectChains.size(), this);
5688    if (mEffectChains.size() == 1) {
5689        updateSuspendedSessionsOnRemoveEffectChain_l(chain);
5690        mEffectChains.removeAt(0);
5691    }
5692    return 0;
5693}
5694
5695// ----------------------------------------------------------------------------
5696//  EffectModule implementation
5697// ----------------------------------------------------------------------------
5698
5699#undef LOG_TAG
5700#define LOG_TAG "AudioFlinger::EffectModule"
5701
5702AudioFlinger::EffectModule::EffectModule(const wp<ThreadBase>& wThread,
5703                                        const wp<AudioFlinger::EffectChain>& chain,
5704                                        effect_descriptor_t *desc,
5705                                        int id,
5706                                        int sessionId)
5707    : mThread(wThread), mChain(chain), mId(id), mSessionId(sessionId), mEffectInterface(NULL),
5708      mStatus(NO_INIT), mState(IDLE), mSuspended(false)
5709{
5710    LOGV("Constructor %p", this);
5711    int lStatus;
5712    sp<ThreadBase> thread = mThread.promote();
5713    if (thread == 0) {
5714        return;
5715    }
5716
5717    memcpy(&mDescriptor, desc, sizeof(effect_descriptor_t));
5718
5719    // create effect engine from effect factory
5720    mStatus = EffectCreate(&desc->uuid, sessionId, thread->id(), &mEffectInterface);
5721
5722    if (mStatus != NO_ERROR) {
5723        return;
5724    }
5725    lStatus = init();
5726    if (lStatus < 0) {
5727        mStatus = lStatus;
5728        goto Error;
5729    }
5730
5731    LOGV("Constructor success name %s, Interface %p", mDescriptor.name, mEffectInterface);
5732    return;
5733Error:
5734    EffectRelease(mEffectInterface);
5735    mEffectInterface = NULL;
5736    LOGV("Constructor Error %d", mStatus);
5737}
5738
5739AudioFlinger::EffectModule::~EffectModule()
5740{
5741    LOGV("Destructor %p", this);
5742    if (mEffectInterface != NULL) {
5743        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
5744                (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC) {
5745            sp<ThreadBase> thread = mThread.promote();
5746            if (thread != 0) {
5747                thread->stream()->remove_audio_effect(thread->stream(), mEffectInterface);
5748            }
5749        }
5750        // release effect engine
5751        EffectRelease(mEffectInterface);
5752    }
5753}
5754
5755status_t AudioFlinger::EffectModule::addHandle(sp<EffectHandle>& handle)
5756{
5757    status_t status;
5758
5759    Mutex::Autolock _l(mLock);
5760    // First handle in mHandles has highest priority and controls the effect module
5761    int priority = handle->priority();
5762    size_t size = mHandles.size();
5763    sp<EffectHandle> h;
5764    size_t i;
5765    for (i = 0; i < size; i++) {
5766        h = mHandles[i].promote();
5767        if (h == 0) continue;
5768        if (h->priority() <= priority) break;
5769    }
5770    // if inserted in first place, move effect control from previous owner to this handle
5771    if (i == 0) {
5772        bool enabled = false;
5773        if (h != 0) {
5774            enabled = h->enabled();
5775            h->setControl(false/*hasControl*/, true /*signal*/, enabled /*enabled*/);
5776        }
5777        handle->setControl(true /*hasControl*/, false /*signal*/, enabled /*enabled*/);
5778        status = NO_ERROR;
5779    } else {
5780        status = ALREADY_EXISTS;
5781    }
5782    LOGV("addHandle() %p added handle %p in position %d", this, handle.get(), i);
5783    mHandles.insertAt(handle, i);
5784    return status;
5785}
5786
5787size_t AudioFlinger::EffectModule::removeHandle(const wp<EffectHandle>& handle)
5788{
5789    Mutex::Autolock _l(mLock);
5790    size_t size = mHandles.size();
5791    size_t i;
5792    for (i = 0; i < size; i++) {
5793        if (mHandles[i] == handle) break;
5794    }
5795    if (i == size) {
5796        return size;
5797    }
5798    LOGV("removeHandle() %p removed handle %p in position %d", this, handle.unsafe_get(), i);
5799
5800    bool enabled = false;
5801    EffectHandle *hdl = handle.unsafe_get();
5802    if (hdl) {
5803        LOGV("removeHandle() unsafe_get OK");
5804        enabled = hdl->enabled();
5805    }
5806    mHandles.removeAt(i);
5807    size = mHandles.size();
5808    // if removed from first place, move effect control from this handle to next in line
5809    if (i == 0 && size != 0) {
5810        sp<EffectHandle> h = mHandles[0].promote();
5811        if (h != 0) {
5812            h->setControl(true /*hasControl*/, true /*signal*/ , enabled /*enabled*/);
5813        }
5814    }
5815
5816    // Prevent calls to process() and other functions on effect interface from now on.
5817    // The effect engine will be released by the destructor when the last strong reference on
5818    // this object is released which can happen after next process is called.
5819    if (size == 0) {
5820        mState = DESTROYED;
5821    }
5822
5823    return size;
5824}
5825
5826sp<AudioFlinger::EffectHandle> AudioFlinger::EffectModule::controlHandle()
5827{
5828    Mutex::Autolock _l(mLock);
5829    sp<EffectHandle> handle;
5830    if (mHandles.size() != 0) {
5831        handle = mHandles[0].promote();
5832    }
5833    return handle;
5834}
5835
5836
5837
5838void AudioFlinger::EffectModule::disconnect(const wp<EffectHandle>& handle)
5839{
5840    LOGV("disconnect() %p handle %p ", this, handle.unsafe_get());
5841    // keep a strong reference on this EffectModule to avoid calling the
5842    // destructor before we exit
5843    sp<EffectModule> keep(this);
5844    {
5845        sp<ThreadBase> thread = mThread.promote();
5846        if (thread != 0) {
5847            thread->disconnectEffect(keep, handle);
5848        }
5849    }
5850}
5851
5852void AudioFlinger::EffectModule::updateState() {
5853    Mutex::Autolock _l(mLock);
5854
5855    switch (mState) {
5856    case RESTART:
5857        reset_l();
5858        // FALL THROUGH
5859
5860    case STARTING:
5861        // clear auxiliary effect input buffer for next accumulation
5862        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5863            memset(mConfig.inputCfg.buffer.raw,
5864                   0,
5865                   mConfig.inputCfg.buffer.frameCount*sizeof(int32_t));
5866        }
5867        start_l();
5868        mState = ACTIVE;
5869        break;
5870    case STOPPING:
5871        stop_l();
5872        mDisableWaitCnt = mMaxDisableWaitCnt;
5873        mState = STOPPED;
5874        break;
5875    case STOPPED:
5876        // mDisableWaitCnt is forced to 1 by process() when the engine indicates the end of the
5877        // turn off sequence.
5878        if (--mDisableWaitCnt == 0) {
5879            reset_l();
5880            mState = IDLE;
5881        }
5882        break;
5883    default: //IDLE , ACTIVE, DESTROYED
5884        break;
5885    }
5886}
5887
5888void AudioFlinger::EffectModule::process()
5889{
5890    Mutex::Autolock _l(mLock);
5891
5892    if (mState == DESTROYED || mEffectInterface == NULL ||
5893            mConfig.inputCfg.buffer.raw == NULL ||
5894            mConfig.outputCfg.buffer.raw == NULL) {
5895        return;
5896    }
5897
5898    if (isProcessEnabled()) {
5899        // do 32 bit to 16 bit conversion for auxiliary effect input buffer
5900        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5901            AudioMixer::ditherAndClamp(mConfig.inputCfg.buffer.s32,
5902                                        mConfig.inputCfg.buffer.s32,
5903                                        mConfig.inputCfg.buffer.frameCount/2);
5904        }
5905
5906        // do the actual processing in the effect engine
5907        int ret = (*mEffectInterface)->process(mEffectInterface,
5908                                               &mConfig.inputCfg.buffer,
5909                                               &mConfig.outputCfg.buffer);
5910
5911        // force transition to IDLE state when engine is ready
5912        if (mState == STOPPED && ret == -ENODATA) {
5913            mDisableWaitCnt = 1;
5914        }
5915
5916        // clear auxiliary effect input buffer for next accumulation
5917        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5918            memset(mConfig.inputCfg.buffer.raw, 0,
5919                   mConfig.inputCfg.buffer.frameCount*sizeof(int32_t));
5920        }
5921    } else if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_INSERT &&
5922                mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
5923        // If an insert effect is idle and input buffer is different from output buffer,
5924        // accumulate input onto output
5925        sp<EffectChain> chain = mChain.promote();
5926        if (chain != 0 && chain->activeTrackCnt() != 0) {
5927            size_t frameCnt = mConfig.inputCfg.buffer.frameCount * 2;  //always stereo here
5928            int16_t *in = mConfig.inputCfg.buffer.s16;
5929            int16_t *out = mConfig.outputCfg.buffer.s16;
5930            for (size_t i = 0; i < frameCnt; i++) {
5931                out[i] = clamp16((int32_t)out[i] + (int32_t)in[i]);
5932            }
5933        }
5934    }
5935}
5936
5937void AudioFlinger::EffectModule::reset_l()
5938{
5939    if (mEffectInterface == NULL) {
5940        return;
5941    }
5942    (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_RESET, 0, NULL, 0, NULL);
5943}
5944
5945status_t AudioFlinger::EffectModule::configure()
5946{
5947    uint32_t channels;
5948    if (mEffectInterface == NULL) {
5949        return NO_INIT;
5950    }
5951
5952    sp<ThreadBase> thread = mThread.promote();
5953    if (thread == 0) {
5954        return DEAD_OBJECT;
5955    }
5956
5957    // TODO: handle configuration of effects replacing track process
5958    if (thread->channelCount() == 1) {
5959        channels = AUDIO_CHANNEL_OUT_MONO;
5960    } else {
5961        channels = AUDIO_CHANNEL_OUT_STEREO;
5962    }
5963
5964    if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5965        mConfig.inputCfg.channels = AUDIO_CHANNEL_OUT_MONO;
5966    } else {
5967        mConfig.inputCfg.channels = channels;
5968    }
5969    mConfig.outputCfg.channels = channels;
5970    mConfig.inputCfg.format = AUDIO_FORMAT_PCM_16_BIT;
5971    mConfig.outputCfg.format = AUDIO_FORMAT_PCM_16_BIT;
5972    mConfig.inputCfg.samplingRate = thread->sampleRate();
5973    mConfig.outputCfg.samplingRate = mConfig.inputCfg.samplingRate;
5974    mConfig.inputCfg.bufferProvider.cookie = NULL;
5975    mConfig.inputCfg.bufferProvider.getBuffer = NULL;
5976    mConfig.inputCfg.bufferProvider.releaseBuffer = NULL;
5977    mConfig.outputCfg.bufferProvider.cookie = NULL;
5978    mConfig.outputCfg.bufferProvider.getBuffer = NULL;
5979    mConfig.outputCfg.bufferProvider.releaseBuffer = NULL;
5980    mConfig.inputCfg.accessMode = EFFECT_BUFFER_ACCESS_READ;
5981    // Insert effect:
5982    // - in session AUDIO_SESSION_OUTPUT_MIX or AUDIO_SESSION_OUTPUT_STAGE,
5983    // always overwrites output buffer: input buffer == output buffer
5984    // - in other sessions:
5985    //      last effect in the chain accumulates in output buffer: input buffer != output buffer
5986    //      other effect: overwrites output buffer: input buffer == output buffer
5987    // Auxiliary effect:
5988    //      accumulates in output buffer: input buffer != output buffer
5989    // Therefore: accumulate <=> input buffer != output buffer
5990    if (mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
5991        mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_ACCUMULATE;
5992    } else {
5993        mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_WRITE;
5994    }
5995    mConfig.inputCfg.mask = EFFECT_CONFIG_ALL;
5996    mConfig.outputCfg.mask = EFFECT_CONFIG_ALL;
5997    mConfig.inputCfg.buffer.frameCount = thread->frameCount();
5998    mConfig.outputCfg.buffer.frameCount = mConfig.inputCfg.buffer.frameCount;
5999
6000    LOGV("configure() %p thread %p buffer %p framecount %d",
6001            this, thread.get(), mConfig.inputCfg.buffer.raw, mConfig.inputCfg.buffer.frameCount);
6002
6003    status_t cmdStatus;
6004    uint32_t size = sizeof(int);
6005    status_t status = (*mEffectInterface)->command(mEffectInterface,
6006                                                   EFFECT_CMD_CONFIGURE,
6007                                                   sizeof(effect_config_t),
6008                                                   &mConfig,
6009                                                   &size,
6010                                                   &cmdStatus);
6011    if (status == 0) {
6012        status = cmdStatus;
6013    }
6014
6015    mMaxDisableWaitCnt = (MAX_DISABLE_TIME_MS * mConfig.outputCfg.samplingRate) /
6016            (1000 * mConfig.outputCfg.buffer.frameCount);
6017
6018    return status;
6019}
6020
6021status_t AudioFlinger::EffectModule::init()
6022{
6023    Mutex::Autolock _l(mLock);
6024    if (mEffectInterface == NULL) {
6025        return NO_INIT;
6026    }
6027    status_t cmdStatus;
6028    uint32_t size = sizeof(status_t);
6029    status_t status = (*mEffectInterface)->command(mEffectInterface,
6030                                                   EFFECT_CMD_INIT,
6031                                                   0,
6032                                                   NULL,
6033                                                   &size,
6034                                                   &cmdStatus);
6035    if (status == 0) {
6036        status = cmdStatus;
6037    }
6038    return status;
6039}
6040
6041status_t AudioFlinger::EffectModule::start_l()
6042{
6043    if (mEffectInterface == NULL) {
6044        return NO_INIT;
6045    }
6046    status_t cmdStatus;
6047    uint32_t size = sizeof(status_t);
6048    status_t status = (*mEffectInterface)->command(mEffectInterface,
6049                                                   EFFECT_CMD_ENABLE,
6050                                                   0,
6051                                                   NULL,
6052                                                   &size,
6053                                                   &cmdStatus);
6054    if (status == 0) {
6055        status = cmdStatus;
6056    }
6057    if (status == 0 &&
6058            ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
6059             (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC)) {
6060        sp<ThreadBase> thread = mThread.promote();
6061        if (thread != 0) {
6062            thread->stream()->add_audio_effect(thread->stream(), mEffectInterface);
6063        }
6064    }
6065    return status;
6066}
6067
6068status_t AudioFlinger::EffectModule::stop()
6069{
6070    Mutex::Autolock _l(mLock);
6071    return stop_l();
6072}
6073
6074status_t AudioFlinger::EffectModule::stop_l()
6075{
6076    if (mEffectInterface == NULL) {
6077        return NO_INIT;
6078    }
6079    status_t cmdStatus;
6080    uint32_t size = sizeof(status_t);
6081    status_t status = (*mEffectInterface)->command(mEffectInterface,
6082                                                   EFFECT_CMD_DISABLE,
6083                                                   0,
6084                                                   NULL,
6085                                                   &size,
6086                                                   &cmdStatus);
6087    if (status == 0) {
6088        status = cmdStatus;
6089    }
6090    if (status == 0 &&
6091            ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
6092             (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC)) {
6093        sp<ThreadBase> thread = mThread.promote();
6094        if (thread != 0) {
6095            thread->stream()->remove_audio_effect(thread->stream(), mEffectInterface);
6096        }
6097    }
6098    return status;
6099}
6100
6101status_t AudioFlinger::EffectModule::command(uint32_t cmdCode,
6102                                             uint32_t cmdSize,
6103                                             void *pCmdData,
6104                                             uint32_t *replySize,
6105                                             void *pReplyData)
6106{
6107    Mutex::Autolock _l(mLock);
6108//    LOGV("command(), cmdCode: %d, mEffectInterface: %p", cmdCode, mEffectInterface);
6109
6110    if (mState == DESTROYED || mEffectInterface == NULL) {
6111        return NO_INIT;
6112    }
6113    status_t status = (*mEffectInterface)->command(mEffectInterface,
6114                                                   cmdCode,
6115                                                   cmdSize,
6116                                                   pCmdData,
6117                                                   replySize,
6118                                                   pReplyData);
6119    if (cmdCode != EFFECT_CMD_GET_PARAM && status == NO_ERROR) {
6120        uint32_t size = (replySize == NULL) ? 0 : *replySize;
6121        for (size_t i = 1; i < mHandles.size(); i++) {
6122            sp<EffectHandle> h = mHandles[i].promote();
6123            if (h != 0) {
6124                h->commandExecuted(cmdCode, cmdSize, pCmdData, size, pReplyData);
6125            }
6126        }
6127    }
6128    return status;
6129}
6130
6131status_t AudioFlinger::EffectModule::setEnabled(bool enabled)
6132{
6133    Mutex::Autolock _l(mLock);
6134    LOGV("setEnabled %p enabled %d", this, enabled);
6135
6136    if (enabled != isEnabled()) {
6137        switch (mState) {
6138        // going from disabled to enabled
6139        case IDLE:
6140            mState = STARTING;
6141            break;
6142        case STOPPED:
6143            mState = RESTART;
6144            break;
6145        case STOPPING:
6146            mState = ACTIVE;
6147            break;
6148
6149        // going from enabled to disabled
6150        case RESTART:
6151            mState = STOPPED;
6152            break;
6153        case STARTING:
6154            mState = IDLE;
6155            break;
6156        case ACTIVE:
6157            mState = STOPPING;
6158            break;
6159        case DESTROYED:
6160            return NO_ERROR; // simply ignore as we are being destroyed
6161        }
6162        for (size_t i = 1; i < mHandles.size(); i++) {
6163            sp<EffectHandle> h = mHandles[i].promote();
6164            if (h != 0) {
6165                h->setEnabled(enabled);
6166            }
6167        }
6168    }
6169    return NO_ERROR;
6170}
6171
6172bool AudioFlinger::EffectModule::isEnabled()
6173{
6174    switch (mState) {
6175    case RESTART:
6176    case STARTING:
6177    case ACTIVE:
6178        return true;
6179    case IDLE:
6180    case STOPPING:
6181    case STOPPED:
6182    case DESTROYED:
6183    default:
6184        return false;
6185    }
6186}
6187
6188bool AudioFlinger::EffectModule::isProcessEnabled()
6189{
6190    switch (mState) {
6191    case RESTART:
6192    case ACTIVE:
6193    case STOPPING:
6194    case STOPPED:
6195        return true;
6196    case IDLE:
6197    case STARTING:
6198    case DESTROYED:
6199    default:
6200        return false;
6201    }
6202}
6203
6204status_t AudioFlinger::EffectModule::setVolume(uint32_t *left, uint32_t *right, bool controller)
6205{
6206    Mutex::Autolock _l(mLock);
6207    status_t status = NO_ERROR;
6208
6209    // Send volume indication if EFFECT_FLAG_VOLUME_IND is set and read back altered volume
6210    // if controller flag is set (Note that controller == TRUE => EFFECT_FLAG_VOLUME_CTRL set)
6211    if (isProcessEnabled() &&
6212            ((mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_CTRL ||
6213            (mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_IND)) {
6214        status_t cmdStatus;
6215        uint32_t volume[2];
6216        uint32_t *pVolume = NULL;
6217        uint32_t size = sizeof(volume);
6218        volume[0] = *left;
6219        volume[1] = *right;
6220        if (controller) {
6221            pVolume = volume;
6222        }
6223        status = (*mEffectInterface)->command(mEffectInterface,
6224                                              EFFECT_CMD_SET_VOLUME,
6225                                              size,
6226                                              volume,
6227                                              &size,
6228                                              pVolume);
6229        if (controller && status == NO_ERROR && size == sizeof(volume)) {
6230            *left = volume[0];
6231            *right = volume[1];
6232        }
6233    }
6234    return status;
6235}
6236
6237status_t AudioFlinger::EffectModule::setDevice(uint32_t device)
6238{
6239    Mutex::Autolock _l(mLock);
6240    status_t status = NO_ERROR;
6241    if (device && (mDescriptor.flags & EFFECT_FLAG_DEVICE_MASK) == EFFECT_FLAG_DEVICE_IND) {
6242        // audio pre processing modules on RecordThread can receive both output and
6243        // input device indication in the same call
6244        uint32_t dev = device & AUDIO_DEVICE_OUT_ALL;
6245        if (dev) {
6246            status_t cmdStatus;
6247            uint32_t size = sizeof(status_t);
6248
6249            status = (*mEffectInterface)->command(mEffectInterface,
6250                                                  EFFECT_CMD_SET_DEVICE,
6251                                                  sizeof(uint32_t),
6252                                                  &dev,
6253                                                  &size,
6254                                                  &cmdStatus);
6255            if (status == NO_ERROR) {
6256                status = cmdStatus;
6257            }
6258        }
6259        dev = device & AUDIO_DEVICE_IN_ALL;
6260        if (dev) {
6261            status_t cmdStatus;
6262            uint32_t size = sizeof(status_t);
6263
6264            status_t status2 = (*mEffectInterface)->command(mEffectInterface,
6265                                                  EFFECT_CMD_SET_INPUT_DEVICE,
6266                                                  sizeof(uint32_t),
6267                                                  &dev,
6268                                                  &size,
6269                                                  &cmdStatus);
6270            if (status2 == NO_ERROR) {
6271                status2 = cmdStatus;
6272            }
6273            if (status == NO_ERROR) {
6274                status = status2;
6275            }
6276        }
6277    }
6278    return status;
6279}
6280
6281status_t AudioFlinger::EffectModule::setMode(uint32_t mode)
6282{
6283    Mutex::Autolock _l(mLock);
6284    status_t status = NO_ERROR;
6285    if ((mDescriptor.flags & EFFECT_FLAG_AUDIO_MODE_MASK) == EFFECT_FLAG_AUDIO_MODE_IND) {
6286        status_t cmdStatus;
6287        uint32_t size = sizeof(status_t);
6288        status = (*mEffectInterface)->command(mEffectInterface,
6289                                              EFFECT_CMD_SET_AUDIO_MODE,
6290                                              sizeof(int),
6291                                              &mode,
6292                                              &size,
6293                                              &cmdStatus);
6294        if (status == NO_ERROR) {
6295            status = cmdStatus;
6296        }
6297    }
6298    return status;
6299}
6300
6301void AudioFlinger::EffectModule::setSuspended(bool suspended)
6302{
6303    Mutex::Autolock _l(mLock);
6304    mSuspended = suspended;
6305}
6306bool AudioFlinger::EffectModule::suspended()
6307{
6308    Mutex::Autolock _l(mLock);
6309    return mSuspended;
6310}
6311
6312status_t AudioFlinger::EffectModule::dump(int fd, const Vector<String16>& args)
6313{
6314    const size_t SIZE = 256;
6315    char buffer[SIZE];
6316    String8 result;
6317
6318    snprintf(buffer, SIZE, "\tEffect ID %d:\n", mId);
6319    result.append(buffer);
6320
6321    bool locked = tryLock(mLock);
6322    // failed to lock - AudioFlinger is probably deadlocked
6323    if (!locked) {
6324        result.append("\t\tCould not lock Fx mutex:\n");
6325    }
6326
6327    result.append("\t\tSession Status State Engine:\n");
6328    snprintf(buffer, SIZE, "\t\t%05d   %03d    %03d   0x%08x\n",
6329            mSessionId, mStatus, mState, (uint32_t)mEffectInterface);
6330    result.append(buffer);
6331
6332    result.append("\t\tDescriptor:\n");
6333    snprintf(buffer, SIZE, "\t\t- UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
6334            mDescriptor.uuid.timeLow, mDescriptor.uuid.timeMid, mDescriptor.uuid.timeHiAndVersion,
6335            mDescriptor.uuid.clockSeq, mDescriptor.uuid.node[0], mDescriptor.uuid.node[1],mDescriptor.uuid.node[2],
6336            mDescriptor.uuid.node[3],mDescriptor.uuid.node[4],mDescriptor.uuid.node[5]);
6337    result.append(buffer);
6338    snprintf(buffer, SIZE, "\t\t- TYPE: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
6339                mDescriptor.type.timeLow, mDescriptor.type.timeMid, mDescriptor.type.timeHiAndVersion,
6340                mDescriptor.type.clockSeq, mDescriptor.type.node[0], mDescriptor.type.node[1],mDescriptor.type.node[2],
6341                mDescriptor.type.node[3],mDescriptor.type.node[4],mDescriptor.type.node[5]);
6342    result.append(buffer);
6343    snprintf(buffer, SIZE, "\t\t- apiVersion: %08X\n\t\t- flags: %08X\n",
6344            mDescriptor.apiVersion,
6345            mDescriptor.flags);
6346    result.append(buffer);
6347    snprintf(buffer, SIZE, "\t\t- name: %s\n",
6348            mDescriptor.name);
6349    result.append(buffer);
6350    snprintf(buffer, SIZE, "\t\t- implementor: %s\n",
6351            mDescriptor.implementor);
6352    result.append(buffer);
6353
6354    result.append("\t\t- Input configuration:\n");
6355    result.append("\t\t\tBuffer     Frames  Smp rate Channels Format\n");
6356    snprintf(buffer, SIZE, "\t\t\t0x%08x %05d   %05d    %08x %d\n",
6357            (uint32_t)mConfig.inputCfg.buffer.raw,
6358            mConfig.inputCfg.buffer.frameCount,
6359            mConfig.inputCfg.samplingRate,
6360            mConfig.inputCfg.channels,
6361            mConfig.inputCfg.format);
6362    result.append(buffer);
6363
6364    result.append("\t\t- Output configuration:\n");
6365    result.append("\t\t\tBuffer     Frames  Smp rate Channels Format\n");
6366    snprintf(buffer, SIZE, "\t\t\t0x%08x %05d   %05d    %08x %d\n",
6367            (uint32_t)mConfig.outputCfg.buffer.raw,
6368            mConfig.outputCfg.buffer.frameCount,
6369            mConfig.outputCfg.samplingRate,
6370            mConfig.outputCfg.channels,
6371            mConfig.outputCfg.format);
6372    result.append(buffer);
6373
6374    snprintf(buffer, SIZE, "\t\t%d Clients:\n", mHandles.size());
6375    result.append(buffer);
6376    result.append("\t\t\tPid   Priority Ctrl Locked client server\n");
6377    for (size_t i = 0; i < mHandles.size(); ++i) {
6378        sp<EffectHandle> handle = mHandles[i].promote();
6379        if (handle != 0) {
6380            handle->dump(buffer, SIZE);
6381            result.append(buffer);
6382        }
6383    }
6384
6385    result.append("\n");
6386
6387    write(fd, result.string(), result.length());
6388
6389    if (locked) {
6390        mLock.unlock();
6391    }
6392
6393    return NO_ERROR;
6394}
6395
6396// ----------------------------------------------------------------------------
6397//  EffectHandle implementation
6398// ----------------------------------------------------------------------------
6399
6400#undef LOG_TAG
6401#define LOG_TAG "AudioFlinger::EffectHandle"
6402
6403AudioFlinger::EffectHandle::EffectHandle(const sp<EffectModule>& effect,
6404                                        const sp<AudioFlinger::Client>& client,
6405                                        const sp<IEffectClient>& effectClient,
6406                                        int32_t priority)
6407    : BnEffect(),
6408    mEffect(effect), mEffectClient(effectClient), mClient(client),
6409    mPriority(priority), mHasControl(false), mEnabled(false)
6410{
6411    LOGV("constructor %p", this);
6412
6413    int bufOffset = ((sizeof(effect_param_cblk_t) - 1) / sizeof(int) + 1) * sizeof(int);
6414    mCblkMemory = client->heap()->allocate(EFFECT_PARAM_BUFFER_SIZE + bufOffset);
6415    if (mCblkMemory != 0) {
6416        mCblk = static_cast<effect_param_cblk_t *>(mCblkMemory->pointer());
6417
6418        if (mCblk) {
6419            new(mCblk) effect_param_cblk_t();
6420            mBuffer = (uint8_t *)mCblk + bufOffset;
6421         }
6422    } else {
6423        LOGE("not enough memory for Effect size=%u", EFFECT_PARAM_BUFFER_SIZE + sizeof(effect_param_cblk_t));
6424        return;
6425    }
6426}
6427
6428AudioFlinger::EffectHandle::~EffectHandle()
6429{
6430    LOGV("Destructor %p", this);
6431    disconnect();
6432    LOGV("Destructor DONE %p", this);
6433}
6434
6435status_t AudioFlinger::EffectHandle::enable()
6436{
6437    LOGV("enable %p", this);
6438    if (!mHasControl) return INVALID_OPERATION;
6439    if (mEffect == 0) return DEAD_OBJECT;
6440
6441    mEnabled = true;
6442
6443    sp<ThreadBase> thread = mEffect->thread().promote();
6444    if (thread != 0) {
6445        thread->checkSuspendOnEffectEnabled(mEffect, true, mEffect->sessionId());
6446    }
6447
6448    // checkSuspendOnEffectEnabled() can suspend this same effect when enabled
6449    if (mEffect->suspended()) {
6450        return NO_ERROR;
6451    }
6452
6453    return mEffect->setEnabled(true);
6454}
6455
6456status_t AudioFlinger::EffectHandle::disable()
6457{
6458    LOGV("disable %p", this);
6459    if (!mHasControl) return INVALID_OPERATION;
6460    if (mEffect == 0) return DEAD_OBJECT;
6461
6462    mEnabled = false;
6463
6464    if (mEffect->suspended()) {
6465        return NO_ERROR;
6466    }
6467
6468    status_t status = mEffect->setEnabled(false);
6469
6470    sp<ThreadBase> thread = mEffect->thread().promote();
6471    if (thread != 0) {
6472        thread->checkSuspendOnEffectEnabled(mEffect, false, mEffect->sessionId());
6473    }
6474
6475    return status;
6476}
6477
6478void AudioFlinger::EffectHandle::disconnect()
6479{
6480    LOGV("disconnect %p", this);
6481    if (mEffect == 0) {
6482        return;
6483    }
6484
6485    mEffect->disconnect(this);
6486
6487    sp<ThreadBase> thread = mEffect->thread().promote();
6488    if (thread != 0) {
6489        thread->checkSuspendOnEffectEnabled(mEffect, false, mEffect->sessionId());
6490    }
6491
6492    // release sp on module => module destructor can be called now
6493    mEffect.clear();
6494    if (mCblk) {
6495        mCblk->~effect_param_cblk_t();   // destroy our shared-structure.
6496    }
6497    mCblkMemory.clear();            // and free the shared memory
6498    if (mClient != 0) {
6499        Mutex::Autolock _l(mClient->audioFlinger()->mLock);
6500        mClient.clear();
6501    }
6502}
6503
6504status_t AudioFlinger::EffectHandle::command(uint32_t cmdCode,
6505                                             uint32_t cmdSize,
6506                                             void *pCmdData,
6507                                             uint32_t *replySize,
6508                                             void *pReplyData)
6509{
6510//    LOGV("command(), cmdCode: %d, mHasControl: %d, mEffect: %p",
6511//              cmdCode, mHasControl, (mEffect == 0) ? 0 : mEffect.get());
6512
6513    // only get parameter command is permitted for applications not controlling the effect
6514    if (!mHasControl && cmdCode != EFFECT_CMD_GET_PARAM) {
6515        return INVALID_OPERATION;
6516    }
6517    if (mEffect == 0) return DEAD_OBJECT;
6518
6519    // handle commands that are not forwarded transparently to effect engine
6520    if (cmdCode == EFFECT_CMD_SET_PARAM_COMMIT) {
6521        // No need to trylock() here as this function is executed in the binder thread serving a particular client process:
6522        // no risk to block the whole media server process or mixer threads is we are stuck here
6523        Mutex::Autolock _l(mCblk->lock);
6524        if (mCblk->clientIndex > EFFECT_PARAM_BUFFER_SIZE ||
6525            mCblk->serverIndex > EFFECT_PARAM_BUFFER_SIZE) {
6526            mCblk->serverIndex = 0;
6527            mCblk->clientIndex = 0;
6528            return BAD_VALUE;
6529        }
6530        status_t status = NO_ERROR;
6531        while (mCblk->serverIndex < mCblk->clientIndex) {
6532            int reply;
6533            uint32_t rsize = sizeof(int);
6534            int *p = (int *)(mBuffer + mCblk->serverIndex);
6535            int size = *p++;
6536            if (((uint8_t *)p + size) > mBuffer + mCblk->clientIndex) {
6537                LOGW("command(): invalid parameter block size");
6538                break;
6539            }
6540            effect_param_t *param = (effect_param_t *)p;
6541            if (param->psize == 0 || param->vsize == 0) {
6542                LOGW("command(): null parameter or value size");
6543                mCblk->serverIndex += size;
6544                continue;
6545            }
6546            uint32_t psize = sizeof(effect_param_t) +
6547                             ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) +
6548                             param->vsize;
6549            status_t ret = mEffect->command(EFFECT_CMD_SET_PARAM,
6550                                            psize,
6551                                            p,
6552                                            &rsize,
6553                                            &reply);
6554            // stop at first error encountered
6555            if (ret != NO_ERROR) {
6556                status = ret;
6557                *(int *)pReplyData = reply;
6558                break;
6559            } else if (reply != NO_ERROR) {
6560                *(int *)pReplyData = reply;
6561                break;
6562            }
6563            mCblk->serverIndex += size;
6564        }
6565        mCblk->serverIndex = 0;
6566        mCblk->clientIndex = 0;
6567        return status;
6568    } else if (cmdCode == EFFECT_CMD_ENABLE) {
6569        *(int *)pReplyData = NO_ERROR;
6570        return enable();
6571    } else if (cmdCode == EFFECT_CMD_DISABLE) {
6572        *(int *)pReplyData = NO_ERROR;
6573        return disable();
6574    }
6575
6576    return mEffect->command(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
6577}
6578
6579sp<IMemory> AudioFlinger::EffectHandle::getCblk() const {
6580    return mCblkMemory;
6581}
6582
6583void AudioFlinger::EffectHandle::setControl(bool hasControl, bool signal, bool enabled)
6584{
6585    LOGV("setControl %p control %d", this, hasControl);
6586
6587    mHasControl = hasControl;
6588    mEnabled = enabled;
6589
6590    if (signal && mEffectClient != 0) {
6591        mEffectClient->controlStatusChanged(hasControl);
6592    }
6593}
6594
6595void AudioFlinger::EffectHandle::commandExecuted(uint32_t cmdCode,
6596                                                 uint32_t cmdSize,
6597                                                 void *pCmdData,
6598                                                 uint32_t replySize,
6599                                                 void *pReplyData)
6600{
6601    if (mEffectClient != 0) {
6602        mEffectClient->commandExecuted(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
6603    }
6604}
6605
6606
6607
6608void AudioFlinger::EffectHandle::setEnabled(bool enabled)
6609{
6610    if (mEffectClient != 0) {
6611        mEffectClient->enableStatusChanged(enabled);
6612    }
6613}
6614
6615status_t AudioFlinger::EffectHandle::onTransact(
6616    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
6617{
6618    return BnEffect::onTransact(code, data, reply, flags);
6619}
6620
6621
6622void AudioFlinger::EffectHandle::dump(char* buffer, size_t size)
6623{
6624    bool locked = tryLock(mCblk->lock);
6625
6626    snprintf(buffer, size, "\t\t\t%05d %05d    %01u    %01u      %05u  %05u\n",
6627            (mClient == NULL) ? getpid() : mClient->pid(),
6628            mPriority,
6629            mHasControl,
6630            !locked,
6631            mCblk->clientIndex,
6632            mCblk->serverIndex
6633            );
6634
6635    if (locked) {
6636        mCblk->lock.unlock();
6637    }
6638}
6639
6640#undef LOG_TAG
6641#define LOG_TAG "AudioFlinger::EffectChain"
6642
6643AudioFlinger::EffectChain::EffectChain(const wp<ThreadBase>& wThread,
6644                                        int sessionId)
6645    : mThread(wThread), mSessionId(sessionId), mActiveTrackCnt(0), mTrackCnt(0),
6646      mOwnInBuffer(false), mVolumeCtrlIdx(-1), mLeftVolume(UINT_MAX), mRightVolume(UINT_MAX),
6647      mNewLeftVolume(UINT_MAX), mNewRightVolume(UINT_MAX)
6648{
6649    mStrategy = AudioSystem::getStrategyForStream(AUDIO_STREAM_MUSIC);
6650}
6651
6652AudioFlinger::EffectChain::~EffectChain()
6653{
6654    if (mOwnInBuffer) {
6655        delete mInBuffer;
6656    }
6657
6658}
6659
6660// getEffectFromDesc_l() must be called with ThreadBase::mLock held
6661sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromDesc_l(effect_descriptor_t *descriptor)
6662{
6663    sp<EffectModule> effect;
6664    size_t size = mEffects.size();
6665
6666    for (size_t i = 0; i < size; i++) {
6667        if (memcmp(&mEffects[i]->desc().uuid, &descriptor->uuid, sizeof(effect_uuid_t)) == 0) {
6668            effect = mEffects[i];
6669            break;
6670        }
6671    }
6672    return effect;
6673}
6674
6675// getEffectFromId_l() must be called with ThreadBase::mLock held
6676sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromId_l(int id)
6677{
6678    sp<EffectModule> effect;
6679    size_t size = mEffects.size();
6680
6681    for (size_t i = 0; i < size; i++) {
6682        // by convention, return first effect if id provided is 0 (0 is never a valid id)
6683        if (id == 0 || mEffects[i]->id() == id) {
6684            effect = mEffects[i];
6685            break;
6686        }
6687    }
6688    return effect;
6689}
6690
6691// getEffectFromType_l() must be called with ThreadBase::mLock held
6692sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromType_l(
6693        const effect_uuid_t *type)
6694{
6695    sp<EffectModule> effect;
6696    size_t size = mEffects.size();
6697
6698    for (size_t i = 0; i < size; i++) {
6699        if (memcmp(&mEffects[i]->desc().type, type, sizeof(effect_uuid_t)) == 0) {
6700            effect = mEffects[i];
6701            break;
6702        }
6703    }
6704    return effect;
6705}
6706
6707// Must be called with EffectChain::mLock locked
6708void AudioFlinger::EffectChain::process_l()
6709{
6710    sp<ThreadBase> thread = mThread.promote();
6711    if (thread == 0) {
6712        LOGW("process_l(): cannot promote mixer thread");
6713        return;
6714    }
6715    bool isGlobalSession = (mSessionId == AUDIO_SESSION_OUTPUT_MIX) ||
6716            (mSessionId == AUDIO_SESSION_OUTPUT_STAGE);
6717    bool tracksOnSession = false;
6718    if (!isGlobalSession) {
6719        tracksOnSession = (trackCnt() != 0);
6720    }
6721
6722    // if no track is active, input buffer must be cleared here as the mixer process
6723    // will not do it
6724    if (tracksOnSession &&
6725            activeTrackCnt() == 0) {
6726        size_t numSamples = thread->frameCount() * thread->channelCount();
6727        memset(mInBuffer, 0, numSamples * sizeof(int16_t));
6728    }
6729
6730    size_t size = mEffects.size();
6731    // do not process effect if no track is present in same audio session
6732    if (isGlobalSession || tracksOnSession) {
6733        for (size_t i = 0; i < size; i++) {
6734            mEffects[i]->process();
6735        }
6736    }
6737    for (size_t i = 0; i < size; i++) {
6738        mEffects[i]->updateState();
6739    }
6740}
6741
6742// addEffect_l() must be called with PlaybackThread::mLock held
6743status_t AudioFlinger::EffectChain::addEffect_l(const sp<EffectModule>& effect)
6744{
6745    effect_descriptor_t desc = effect->desc();
6746    uint32_t insertPref = desc.flags & EFFECT_FLAG_INSERT_MASK;
6747
6748    Mutex::Autolock _l(mLock);
6749    effect->setChain(this);
6750    sp<ThreadBase> thread = mThread.promote();
6751    if (thread == 0) {
6752        return NO_INIT;
6753    }
6754    effect->setThread(thread);
6755
6756    if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
6757        // Auxiliary effects are inserted at the beginning of mEffects vector as
6758        // they are processed first and accumulated in chain input buffer
6759        mEffects.insertAt(effect, 0);
6760
6761        // the input buffer for auxiliary effect contains mono samples in
6762        // 32 bit format. This is to avoid saturation in AudoMixer
6763        // accumulation stage. Saturation is done in EffectModule::process() before
6764        // calling the process in effect engine
6765        size_t numSamples = thread->frameCount();
6766        int32_t *buffer = new int32_t[numSamples];
6767        memset(buffer, 0, numSamples * sizeof(int32_t));
6768        effect->setInBuffer((int16_t *)buffer);
6769        // auxiliary effects output samples to chain input buffer for further processing
6770        // by insert effects
6771        effect->setOutBuffer(mInBuffer);
6772    } else {
6773        // Insert effects are inserted at the end of mEffects vector as they are processed
6774        //  after track and auxiliary effects.
6775        // Insert effect order as a function of indicated preference:
6776        //  if EFFECT_FLAG_INSERT_EXCLUSIVE, insert in first position or reject if
6777        //  another effect is present
6778        //  else if EFFECT_FLAG_INSERT_FIRST, insert in first position or after the
6779        //  last effect claiming first position
6780        //  else if EFFECT_FLAG_INSERT_LAST, insert in last position or before the
6781        //  first effect claiming last position
6782        //  else if EFFECT_FLAG_INSERT_ANY insert after first or before last
6783        // Reject insertion if an effect with EFFECT_FLAG_INSERT_EXCLUSIVE is
6784        // already present
6785
6786        int size = (int)mEffects.size();
6787        int idx_insert = size;
6788        int idx_insert_first = -1;
6789        int idx_insert_last = -1;
6790
6791        for (int i = 0; i < size; i++) {
6792            effect_descriptor_t d = mEffects[i]->desc();
6793            uint32_t iMode = d.flags & EFFECT_FLAG_TYPE_MASK;
6794            uint32_t iPref = d.flags & EFFECT_FLAG_INSERT_MASK;
6795            if (iMode == EFFECT_FLAG_TYPE_INSERT) {
6796                // check invalid effect chaining combinations
6797                if (insertPref == EFFECT_FLAG_INSERT_EXCLUSIVE ||
6798                    iPref == EFFECT_FLAG_INSERT_EXCLUSIVE) {
6799                    LOGW("addEffect_l() could not insert effect %s: exclusive conflict with %s", desc.name, d.name);
6800                    return INVALID_OPERATION;
6801                }
6802                // remember position of first insert effect and by default
6803                // select this as insert position for new effect
6804                if (idx_insert == size) {
6805                    idx_insert = i;
6806                }
6807                // remember position of last insert effect claiming
6808                // first position
6809                if (iPref == EFFECT_FLAG_INSERT_FIRST) {
6810                    idx_insert_first = i;
6811                }
6812                // remember position of first insert effect claiming
6813                // last position
6814                if (iPref == EFFECT_FLAG_INSERT_LAST &&
6815                    idx_insert_last == -1) {
6816                    idx_insert_last = i;
6817                }
6818            }
6819        }
6820
6821        // modify idx_insert from first position if needed
6822        if (insertPref == EFFECT_FLAG_INSERT_LAST) {
6823            if (idx_insert_last != -1) {
6824                idx_insert = idx_insert_last;
6825            } else {
6826                idx_insert = size;
6827            }
6828        } else {
6829            if (idx_insert_first != -1) {
6830                idx_insert = idx_insert_first + 1;
6831            }
6832        }
6833
6834        // always read samples from chain input buffer
6835        effect->setInBuffer(mInBuffer);
6836
6837        // if last effect in the chain, output samples to chain
6838        // output buffer, otherwise to chain input buffer
6839        if (idx_insert == size) {
6840            if (idx_insert != 0) {
6841                mEffects[idx_insert-1]->setOutBuffer(mInBuffer);
6842                mEffects[idx_insert-1]->configure();
6843            }
6844            effect->setOutBuffer(mOutBuffer);
6845        } else {
6846            effect->setOutBuffer(mInBuffer);
6847        }
6848        mEffects.insertAt(effect, idx_insert);
6849
6850        LOGV("addEffect_l() effect %p, added in chain %p at rank %d", effect.get(), this, idx_insert);
6851    }
6852    effect->configure();
6853    return NO_ERROR;
6854}
6855
6856// removeEffect_l() must be called with PlaybackThread::mLock held
6857size_t AudioFlinger::EffectChain::removeEffect_l(const sp<EffectModule>& effect)
6858{
6859    Mutex::Autolock _l(mLock);
6860    int size = (int)mEffects.size();
6861    int i;
6862    uint32_t type = effect->desc().flags & EFFECT_FLAG_TYPE_MASK;
6863
6864    for (i = 0; i < size; i++) {
6865        if (effect == mEffects[i]) {
6866            // calling stop here will remove pre-processing effect from the audio HAL.
6867            // This is safe as we hold the EffectChain mutex which guarantees that we are not in
6868            // the middle of a read from audio HAL
6869            mEffects[i]->stop();
6870            if (type == EFFECT_FLAG_TYPE_AUXILIARY) {
6871                delete[] effect->inBuffer();
6872            } else {
6873                if (i == size - 1 && i != 0) {
6874                    mEffects[i - 1]->setOutBuffer(mOutBuffer);
6875                    mEffects[i - 1]->configure();
6876                }
6877            }
6878            mEffects.removeAt(i);
6879            LOGV("removeEffect_l() effect %p, removed from chain %p at rank %d", effect.get(), this, i);
6880            break;
6881        }
6882    }
6883
6884    return mEffects.size();
6885}
6886
6887// setDevice_l() must be called with PlaybackThread::mLock held
6888void AudioFlinger::EffectChain::setDevice_l(uint32_t device)
6889{
6890    size_t size = mEffects.size();
6891    for (size_t i = 0; i < size; i++) {
6892        mEffects[i]->setDevice(device);
6893    }
6894}
6895
6896// setMode_l() must be called with PlaybackThread::mLock held
6897void AudioFlinger::EffectChain::setMode_l(uint32_t mode)
6898{
6899    size_t size = mEffects.size();
6900    for (size_t i = 0; i < size; i++) {
6901        mEffects[i]->setMode(mode);
6902    }
6903}
6904
6905// setVolume_l() must be called with PlaybackThread::mLock held
6906bool AudioFlinger::EffectChain::setVolume_l(uint32_t *left, uint32_t *right)
6907{
6908    uint32_t newLeft = *left;
6909    uint32_t newRight = *right;
6910    bool hasControl = false;
6911    int ctrlIdx = -1;
6912    size_t size = mEffects.size();
6913
6914    // first update volume controller
6915    for (size_t i = size; i > 0; i--) {
6916        if (mEffects[i - 1]->isProcessEnabled() &&
6917            (mEffects[i - 1]->desc().flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_CTRL) {
6918            ctrlIdx = i - 1;
6919            hasControl = true;
6920            break;
6921        }
6922    }
6923
6924    if (ctrlIdx == mVolumeCtrlIdx && *left == mLeftVolume && *right == mRightVolume) {
6925        if (hasControl) {
6926            *left = mNewLeftVolume;
6927            *right = mNewRightVolume;
6928        }
6929        return hasControl;
6930    }
6931
6932    mVolumeCtrlIdx = ctrlIdx;
6933    mLeftVolume = newLeft;
6934    mRightVolume = newRight;
6935
6936    // second get volume update from volume controller
6937    if (ctrlIdx >= 0) {
6938        mEffects[ctrlIdx]->setVolume(&newLeft, &newRight, true);
6939        mNewLeftVolume = newLeft;
6940        mNewRightVolume = newRight;
6941    }
6942    // then indicate volume to all other effects in chain.
6943    // Pass altered volume to effects before volume controller
6944    // and requested volume to effects after controller
6945    uint32_t lVol = newLeft;
6946    uint32_t rVol = newRight;
6947
6948    for (size_t i = 0; i < size; i++) {
6949        if ((int)i == ctrlIdx) continue;
6950        // this also works for ctrlIdx == -1 when there is no volume controller
6951        if ((int)i > ctrlIdx) {
6952            lVol = *left;
6953            rVol = *right;
6954        }
6955        mEffects[i]->setVolume(&lVol, &rVol, false);
6956    }
6957    *left = newLeft;
6958    *right = newRight;
6959
6960    return hasControl;
6961}
6962
6963status_t AudioFlinger::EffectChain::dump(int fd, const Vector<String16>& args)
6964{
6965    const size_t SIZE = 256;
6966    char buffer[SIZE];
6967    String8 result;
6968
6969    snprintf(buffer, SIZE, "Effects for session %d:\n", mSessionId);
6970    result.append(buffer);
6971
6972    bool locked = tryLock(mLock);
6973    // failed to lock - AudioFlinger is probably deadlocked
6974    if (!locked) {
6975        result.append("\tCould not lock mutex:\n");
6976    }
6977
6978    result.append("\tNum fx In buffer   Out buffer   Active tracks:\n");
6979    snprintf(buffer, SIZE, "\t%02d     0x%08x  0x%08x   %d\n",
6980            mEffects.size(),
6981            (uint32_t)mInBuffer,
6982            (uint32_t)mOutBuffer,
6983            mActiveTrackCnt);
6984    result.append(buffer);
6985    write(fd, result.string(), result.size());
6986
6987    for (size_t i = 0; i < mEffects.size(); ++i) {
6988        sp<EffectModule> effect = mEffects[i];
6989        if (effect != 0) {
6990            effect->dump(fd, args);
6991        }
6992    }
6993
6994    if (locked) {
6995        mLock.unlock();
6996    }
6997
6998    return NO_ERROR;
6999}
7000
7001// must be called with ThreadBase::mLock held
7002void AudioFlinger::EffectChain::setEffectSuspended_l(
7003        const effect_uuid_t *type, bool suspend)
7004{
7005    sp<SuspendedEffectDesc> desc;
7006    // use effect type UUID timelow as key as there is no real risk of identical
7007    // timeLow fields among effect type UUIDs.
7008    int index = mSuspendedEffects.indexOfKey(type->timeLow);
7009    if (suspend) {
7010        if (index >= 0) {
7011            desc = mSuspendedEffects.valueAt(index);
7012        } else {
7013            desc = new SuspendedEffectDesc();
7014            memcpy(&desc->mType, type, sizeof(effect_uuid_t));
7015            mSuspendedEffects.add(type->timeLow, desc);
7016            LOGV("setEffectSuspended_l() add entry for %08x", type->timeLow);
7017        }
7018        if (desc->mRefCount++ == 0) {
7019            sp<EffectModule> effect = getEffectIfEnabled(type);
7020            if (effect != 0) {
7021                desc->mEffect = effect;
7022                effect->setSuspended(true);
7023                effect->setEnabled(false);
7024            }
7025        }
7026    } else {
7027        if (index < 0) {
7028            return;
7029        }
7030        desc = mSuspendedEffects.valueAt(index);
7031        if (desc->mRefCount <= 0) {
7032            LOGW("setEffectSuspended_l() restore refcount should not be 0 %d", desc->mRefCount);
7033            desc->mRefCount = 1;
7034        }
7035        if (--desc->mRefCount == 0) {
7036            LOGV("setEffectSuspended_l() remove entry for %08x", mSuspendedEffects.keyAt(index));
7037            if (desc->mEffect != 0) {
7038                sp<EffectModule> effect = desc->mEffect.promote();
7039                if (effect != 0) {
7040                    effect->setSuspended(false);
7041                    sp<EffectHandle> handle = effect->controlHandle();
7042                    if (handle != 0) {
7043                        effect->setEnabled(handle->enabled());
7044                    }
7045                }
7046                desc->mEffect.clear();
7047            }
7048            mSuspendedEffects.removeItemsAt(index);
7049        }
7050    }
7051}
7052
7053// must be called with ThreadBase::mLock held
7054void AudioFlinger::EffectChain::setEffectSuspendedAll_l(bool suspend)
7055{
7056    sp<SuspendedEffectDesc> desc;
7057
7058    int index = mSuspendedEffects.indexOfKey((int)kKeyForSuspendAll);
7059    if (suspend) {
7060        if (index >= 0) {
7061            desc = mSuspendedEffects.valueAt(index);
7062        } else {
7063            desc = new SuspendedEffectDesc();
7064            mSuspendedEffects.add((int)kKeyForSuspendAll, desc);
7065            LOGV("setEffectSuspendedAll_l() add entry for 0");
7066        }
7067        if (desc->mRefCount++ == 0) {
7068            Vector< sp<EffectModule> > effects = getSuspendEligibleEffects();
7069            for (size_t i = 0; i < effects.size(); i++) {
7070                setEffectSuspended_l(&effects[i]->desc().type, true);
7071            }
7072        }
7073    } else {
7074        if (index < 0) {
7075            return;
7076        }
7077        desc = mSuspendedEffects.valueAt(index);
7078        if (desc->mRefCount <= 0) {
7079            LOGW("setEffectSuspendedAll_l() restore refcount should not be 0 %d", desc->mRefCount);
7080            desc->mRefCount = 1;
7081        }
7082        if (--desc->mRefCount == 0) {
7083            Vector<const effect_uuid_t *> types;
7084            for (size_t i = 0; i < mSuspendedEffects.size(); i++) {
7085                if (mSuspendedEffects.keyAt(i) == (int)kKeyForSuspendAll) {
7086                    continue;
7087                }
7088                types.add(&mSuspendedEffects.valueAt(i)->mType);
7089            }
7090            for (size_t i = 0; i < types.size(); i++) {
7091                setEffectSuspended_l(types[i], false);
7092            }
7093            LOGV("setEffectSuspendedAll_l() remove entry for %08x", mSuspendedEffects.keyAt(index));
7094            mSuspendedEffects.removeItem((int)kKeyForSuspendAll);
7095        }
7096    }
7097}
7098
7099Vector< sp<AudioFlinger::EffectModule> > AudioFlinger::EffectChain::getSuspendEligibleEffects()
7100{
7101    Vector< sp<EffectModule> > effects;
7102    for (size_t i = 0; i < mEffects.size(); i++) {
7103        effect_descriptor_t desc = mEffects[i]->desc();
7104        // auxiliary effects and vizualizer are never suspended on output mix
7105        if ((mSessionId == AUDIO_SESSION_OUTPUT_MIX) && (
7106            ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) ||
7107             (memcmp(&desc.type, SL_IID_VISUALIZATION, sizeof(effect_uuid_t)) == 0))) {
7108            continue;
7109        }
7110        effects.add(mEffects[i]);
7111    }
7112    return effects;
7113}
7114
7115sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectIfEnabled(
7116                                                            const effect_uuid_t *type)
7117{
7118    sp<EffectModule> effect;
7119    effect = getEffectFromType_l(type);
7120    if (effect != 0 && !effect->isEnabled()) {
7121        effect.clear();
7122    }
7123    return effect;
7124}
7125
7126void AudioFlinger::EffectChain::checkSuspendOnEffectEnabled(const sp<EffectModule>& effect,
7127                                                            bool enabled)
7128{
7129    int index = mSuspendedEffects.indexOfKey(effect->desc().type.timeLow);
7130    if (enabled) {
7131        if (index < 0) {
7132            // if the effect is not suspend check if all effects are suspended
7133            index = mSuspendedEffects.indexOfKey((int)kKeyForSuspendAll);
7134            if (index < 0) {
7135                return;
7136            }
7137            setEffectSuspended_l(&effect->desc().type, enabled);
7138            index = mSuspendedEffects.indexOfKey(effect->desc().type.timeLow);
7139        }
7140        LOGV("checkSuspendOnEffectEnabled() enable suspending fx %08x",
7141             effect->desc().type.timeLow);
7142        sp<SuspendedEffectDesc> desc = mSuspendedEffects.valueAt(index);
7143        // if effect is requested to suspended but was not yet enabled, supend it now.
7144        if (desc->mEffect == 0) {
7145            desc->mEffect = effect;
7146            effect->setEnabled(false);
7147            effect->setSuspended(true);
7148        }
7149    } else {
7150        if (index < 0) {
7151            return;
7152        }
7153        LOGV("checkSuspendOnEffectEnabled() disable restoring fx %08x",
7154             effect->desc().type.timeLow);
7155        sp<SuspendedEffectDesc> desc = mSuspendedEffects.valueAt(index);
7156        desc->mEffect.clear();
7157        effect->setSuspended(false);
7158    }
7159}
7160
7161#undef LOG_TAG
7162#define LOG_TAG "AudioFlinger"
7163
7164// ----------------------------------------------------------------------------
7165
7166status_t AudioFlinger::onTransact(
7167        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
7168{
7169    return BnAudioFlinger::onTransact(code, data, reply, flags);
7170}
7171
7172}; // namespace android
7173