MediaPlayerService.cpp revision 6dc3a3e2292454f94c015da45f1ebfc6a493e736 
1/*
2**
3** Copyright 2008, 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// Proxy for media player implementations
19
20//#define LOG_NDEBUG 0
21#define LOG_TAG "MediaPlayerService"
22#include <utils/Log.h>
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <sys/time.h>
27#include <dirent.h>
28#include <unistd.h>
29
30#include <string.h>
31
32#include <cutils/atomic.h>
33#include <cutils/properties.h> // for property_get
34
35#include <utils/misc.h>
36
37#include <binder/IPCThreadState.h>
38#include <binder/IServiceManager.h>
39#include <binder/MemoryHeapBase.h>
40#include <binder/MemoryBase.h>
41#include <gui/Surface.h>
42#include <utils/Errors.h>  // for status_t
43#include <utils/String8.h>
44#include <utils/SystemClock.h>
45#include <utils/Timers.h>
46#include <utils/Vector.h>
47
48#include <media/AudioPolicyHelper.h>
49#include <media/IMediaHTTPService.h>
50#include <media/IRemoteDisplay.h>
51#include <media/IRemoteDisplayClient.h>
52#include <media/MediaPlayerInterface.h>
53#include <media/mediarecorder.h>
54#include <media/MediaMetadataRetrieverInterface.h>
55#include <media/Metadata.h>
56#include <media/AudioTrack.h>
57#include <media/MemoryLeakTrackUtil.h>
58#include <media/stagefright/MediaCodecList.h>
59#include <media/stagefright/MediaErrors.h>
60#include <media/stagefright/Utils.h>
61#include <media/stagefright/foundation/ADebug.h>
62#include <media/stagefright/foundation/ALooperRoster.h>
63#include <mediautils/BatteryNotifier.h>
64
65#include <memunreachable/memunreachable.h>
66#include <system/audio.h>
67
68#include <private/android_filesystem_config.h>
69
70#include "ActivityManager.h"
71#include "MediaRecorderClient.h"
72#include "MediaPlayerService.h"
73#include "MetadataRetrieverClient.h"
74#include "MediaPlayerFactory.h"
75
76#include "TestPlayerStub.h"
77#include "nuplayer/NuPlayerDriver.h"
78
79#include <OMX.h>
80
81#include "Crypto.h"
82#include "Drm.h"
83#include "HDCP.h"
84#include "HTTPBase.h"
85#include "RemoteDisplay.h"
86
87namespace {
88using android::media::Metadata;
89using android::status_t;
90using android::OK;
91using android::BAD_VALUE;
92using android::NOT_ENOUGH_DATA;
93using android::Parcel;
94
95// Max number of entries in the filter.
96const int kMaxFilterSize = 64;  // I pulled that out of thin air.
97
98const float kMaxRequiredSpeed = 8.0f; // for PCM tracks allow up to 8x speedup.
99
100// FIXME: Move all the metadata related function in the Metadata.cpp
101
102
103// Unmarshall a filter from a Parcel.
104// Filter format in a parcel:
105//
106//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
107// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
108// |                       number of entries (n)                   |
109// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
110// |                       metadata type 1                         |
111// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
112// |                       metadata type 2                         |
113// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
114//  ....
115// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
116// |                       metadata type n                         |
117// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
118//
119// @param p Parcel that should start with a filter.
120// @param[out] filter On exit contains the list of metadata type to be
121//                    filtered.
122// @param[out] status On exit contains the status code to be returned.
123// @return true if the parcel starts with a valid filter.
124bool unmarshallFilter(const Parcel& p,
125                      Metadata::Filter *filter,
126                      status_t *status)
127{
128    int32_t val;
129    if (p.readInt32(&val) != OK)
130    {
131        ALOGE("Failed to read filter's length");
132        *status = NOT_ENOUGH_DATA;
133        return false;
134    }
135
136    if( val > kMaxFilterSize || val < 0)
137    {
138        ALOGE("Invalid filter len %d", val);
139        *status = BAD_VALUE;
140        return false;
141    }
142
143    const size_t num = val;
144
145    filter->clear();
146    filter->setCapacity(num);
147
148    size_t size = num * sizeof(Metadata::Type);
149
150
151    if (p.dataAvail() < size)
152    {
153        ALOGE("Filter too short expected %zu but got %zu", size, p.dataAvail());
154        *status = NOT_ENOUGH_DATA;
155        return false;
156    }
157
158    const Metadata::Type *data =
159            static_cast<const Metadata::Type*>(p.readInplace(size));
160
161    if (NULL == data)
162    {
163        ALOGE("Filter had no data");
164        *status = BAD_VALUE;
165        return false;
166    }
167
168    // TODO: The stl impl of vector would be more efficient here
169    // because it degenerates into a memcpy on pod types. Try to
170    // replace later or use stl::set.
171    for (size_t i = 0; i < num; ++i)
172    {
173        filter->add(*data);
174        ++data;
175    }
176    *status = OK;
177    return true;
178}
179
180// @param filter Of metadata type.
181// @param val To be searched.
182// @return true if a match was found.
183bool findMetadata(const Metadata::Filter& filter, const int32_t val)
184{
185    // Deal with empty and ANY right away
186    if (filter.isEmpty()) return false;
187    if (filter[0] == Metadata::kAny) return true;
188
189    return filter.indexOf(val) >= 0;
190}
191
192}  // anonymous namespace
193
194
195namespace {
196using android::Parcel;
197using android::String16;
198
199// marshalling tag indicating flattened utf16 tags
200// keep in sync with frameworks/base/media/java/android/media/AudioAttributes.java
201const int32_t kAudioAttributesMarshallTagFlattenTags = 1;
202
203// Audio attributes format in a parcel:
204//
205//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
206// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
207// |                       usage                                   |
208// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
209// |                       content_type                            |
210// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
211// |                       source                                  |
212// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
213// |                       flags                                   |
214// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
215// |                       kAudioAttributesMarshallTagFlattenTags  | // ignore tags if not found
216// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
217// |                       flattened tags in UTF16                 |
218// |                         ...                                   |
219// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
220//
221// @param p Parcel that contains audio attributes.
222// @param[out] attributes On exit points to an initialized audio_attributes_t structure
223// @param[out] status On exit contains the status code to be returned.
224void unmarshallAudioAttributes(const Parcel& parcel, audio_attributes_t *attributes)
225{
226    attributes->usage = (audio_usage_t) parcel.readInt32();
227    attributes->content_type = (audio_content_type_t) parcel.readInt32();
228    attributes->source = (audio_source_t) parcel.readInt32();
229    attributes->flags = (audio_flags_mask_t) parcel.readInt32();
230    const bool hasFlattenedTag = (parcel.readInt32() == kAudioAttributesMarshallTagFlattenTags);
231    if (hasFlattenedTag) {
232        // the tags are UTF16, convert to UTF8
233        String16 tags = parcel.readString16();
234        ssize_t realTagSize = utf16_to_utf8_length(tags.string(), tags.size());
235        if (realTagSize <= 0) {
236            strcpy(attributes->tags, "");
237        } else {
238            // copy the flattened string into the attributes as the destination for the conversion:
239            // copying array size -1, array for tags was calloc'd, no need to NULL-terminate it
240            size_t tagSize = realTagSize > AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 ?
241                    AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 : realTagSize;
242            utf16_to_utf8(tags.string(), tagSize, attributes->tags);
243        }
244    } else {
245        ALOGE("unmarshallAudioAttributes() received unflattened tags, ignoring tag values");
246        strcpy(attributes->tags, "");
247    }
248}
249} // anonymous namespace
250
251
252namespace android {
253
254extern ALooperRoster gLooperRoster;
255
256
257static bool checkPermission(const char* permissionString) {
258    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
259    bool ok = checkCallingPermission(String16(permissionString));
260    if (!ok) ALOGE("Request requires %s", permissionString);
261    return ok;
262}
263
264// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
265/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
266/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
267
268void MediaPlayerService::instantiate() {
269    defaultServiceManager()->addService(
270            String16("media.player"), new MediaPlayerService());
271}
272
273MediaPlayerService::MediaPlayerService()
274{
275    ALOGV("MediaPlayerService created");
276    mNextConnId = 1;
277
278    mBatteryAudio.refCount = 0;
279    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
280        mBatteryAudio.deviceOn[i] = 0;
281        mBatteryAudio.lastTime[i] = 0;
282        mBatteryAudio.totalTime[i] = 0;
283    }
284    // speaker is on by default
285    mBatteryAudio.deviceOn[SPEAKER] = 1;
286
287    // reset battery stats
288    // if the mediaserver has crashed, battery stats could be left
289    // in bad state, reset the state upon service start.
290    BatteryNotifier::getInstance().noteResetVideo();
291
292    MediaPlayerFactory::registerBuiltinFactories();
293}
294
295MediaPlayerService::~MediaPlayerService()
296{
297    ALOGV("MediaPlayerService destroyed");
298}
299
300sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(const String16 &opPackageName)
301{
302    pid_t pid = IPCThreadState::self()->getCallingPid();
303    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid, opPackageName);
304    wp<MediaRecorderClient> w = recorder;
305    Mutex::Autolock lock(mLock);
306    mMediaRecorderClients.add(w);
307    ALOGV("Create new media recorder client from pid %d", pid);
308    return recorder;
309}
310
311void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
312{
313    Mutex::Autolock lock(mLock);
314    mMediaRecorderClients.remove(client);
315    ALOGV("Delete media recorder client");
316}
317
318sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
319{
320    pid_t pid = IPCThreadState::self()->getCallingPid();
321    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
322    ALOGV("Create new media retriever from pid %d", pid);
323    return retriever;
324}
325
326sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
327        audio_session_t audioSessionId)
328{
329    pid_t pid = IPCThreadState::self()->getCallingPid();
330    int32_t connId = android_atomic_inc(&mNextConnId);
331
332    sp<Client> c = new Client(
333            this, pid, connId, client, audioSessionId,
334            IPCThreadState::self()->getCallingUid());
335
336    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
337         IPCThreadState::self()->getCallingUid());
338
339    wp<Client> w = c;
340    {
341        Mutex::Autolock lock(mLock);
342        mClients.add(w);
343    }
344    return c;
345}
346
347sp<IMediaCodecList> MediaPlayerService::getCodecList() const {
348    return MediaCodecList::getLocalInstance();
349}
350
351sp<IOMX> MediaPlayerService::getOMX() {
352    ALOGI("MediaPlayerService::getOMX");
353    Mutex::Autolock autoLock(mLock);
354
355    if (mOMX.get() == NULL) {
356        mOMX = new OMX;
357    }
358
359    return mOMX;
360}
361
362sp<ICrypto> MediaPlayerService::makeCrypto() {
363    return new Crypto;
364}
365
366sp<IDrm> MediaPlayerService::makeDrm() {
367    return new Drm;
368}
369
370sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
371    return new HDCP(createEncryptionModule);
372}
373
374sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
375        const String16 &opPackageName,
376        const sp<IRemoteDisplayClient>& client, const String8& iface) {
377    if (!checkPermission("android.permission.CONTROL_WIFI_DISPLAY")) {
378        return NULL;
379    }
380
381    return new RemoteDisplay(opPackageName, client, iface.string());
382}
383
384status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
385{
386    const size_t SIZE = 256;
387    char buffer[SIZE];
388    String8 result;
389
390    result.append(" AudioOutput\n");
391    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
392            mStreamType, mLeftVolume, mRightVolume);
393    result.append(buffer);
394    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
395            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
396    result.append(buffer);
397    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
398            mAuxEffectId, mSendLevel);
399    result.append(buffer);
400
401    ::write(fd, result.string(), result.size());
402    if (mTrack != 0) {
403        mTrack->dump(fd, args);
404    }
405    return NO_ERROR;
406}
407
408status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args)
409{
410    const size_t SIZE = 256;
411    char buffer[SIZE];
412    String8 result;
413    result.append(" Client\n");
414    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
415            mPid, mConnId, mStatus, mLoop?"true": "false");
416    result.append(buffer);
417    write(fd, result.string(), result.size());
418    if (mPlayer != NULL) {
419        mPlayer->dump(fd, args);
420    }
421    if (mAudioOutput != 0) {
422        mAudioOutput->dump(fd, args);
423    }
424    write(fd, "\n", 1);
425    return NO_ERROR;
426}
427
428/**
429 * The only arguments this understands right now are -c, -von and -voff,
430 * which are parsed by ALooperRoster::dump()
431 */
432status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
433{
434    const size_t SIZE = 256;
435    char buffer[SIZE];
436    String8 result;
437    SortedVector< sp<Client> > clients; //to serialise the mutex unlock & client destruction.
438    SortedVector< sp<MediaRecorderClient> > mediaRecorderClients;
439
440    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
441        snprintf(buffer, SIZE, "Permission Denial: "
442                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
443                IPCThreadState::self()->getCallingPid(),
444                IPCThreadState::self()->getCallingUid());
445        result.append(buffer);
446    } else {
447        Mutex::Autolock lock(mLock);
448        for (int i = 0, n = mClients.size(); i < n; ++i) {
449            sp<Client> c = mClients[i].promote();
450            if (c != 0) c->dump(fd, args);
451            clients.add(c);
452        }
453        if (mMediaRecorderClients.size() == 0) {
454                result.append(" No media recorder client\n\n");
455        } else {
456            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
457                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
458                if (c != 0) {
459                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
460                    result.append(buffer);
461                    write(fd, result.string(), result.size());
462                    result = "\n";
463                    c->dump(fd, args);
464                    mediaRecorderClients.add(c);
465                }
466            }
467        }
468
469        result.append(" Files opened and/or mapped:\n");
470        snprintf(buffer, SIZE, "/proc/%d/maps", getpid());
471        FILE *f = fopen(buffer, "r");
472        if (f) {
473            while (!feof(f)) {
474                fgets(buffer, SIZE, f);
475                if (strstr(buffer, " /storage/") ||
476                    strstr(buffer, " /system/sounds/") ||
477                    strstr(buffer, " /data/") ||
478                    strstr(buffer, " /system/media/")) {
479                    result.append("  ");
480                    result.append(buffer);
481                }
482            }
483            fclose(f);
484        } else {
485            result.append("couldn't open ");
486            result.append(buffer);
487            result.append("\n");
488        }
489
490        snprintf(buffer, SIZE, "/proc/%d/fd", getpid());
491        DIR *d = opendir(buffer);
492        if (d) {
493            struct dirent *ent;
494            while((ent = readdir(d)) != NULL) {
495                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
496                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", getpid(), ent->d_name);
497                    struct stat s;
498                    if (lstat(buffer, &s) == 0) {
499                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
500                            char linkto[256];
501                            int len = readlink(buffer, linkto, sizeof(linkto));
502                            if(len > 0) {
503                                if(len > 255) {
504                                    linkto[252] = '.';
505                                    linkto[253] = '.';
506                                    linkto[254] = '.';
507                                    linkto[255] = 0;
508                                } else {
509                                    linkto[len] = 0;
510                                }
511                                if (strstr(linkto, "/storage/") == linkto ||
512                                    strstr(linkto, "/system/sounds/") == linkto ||
513                                    strstr(linkto, "/data/") == linkto ||
514                                    strstr(linkto, "/system/media/") == linkto) {
515                                    result.append("  ");
516                                    result.append(buffer);
517                                    result.append(" -> ");
518                                    result.append(linkto);
519                                    result.append("\n");
520                                }
521                            }
522                        } else {
523                            result.append("  unexpected type for ");
524                            result.append(buffer);
525                            result.append("\n");
526                        }
527                    }
528                }
529            }
530            closedir(d);
531        } else {
532            result.append("couldn't open ");
533            result.append(buffer);
534            result.append("\n");
535        }
536
537        gLooperRoster.dump(fd, args);
538
539        bool dumpMem = false;
540        bool unreachableMemory = false;
541        for (size_t i = 0; i < args.size(); i++) {
542            if (args[i] == String16("-m")) {
543                dumpMem = true;
544            } else if (args[i] == String16("--unreachable")) {
545                unreachableMemory = true;
546            }
547        }
548        if (dumpMem) {
549            dumpMemoryAddresses(fd);
550        }
551        if (unreachableMemory) {
552            result.append("\nDumping unreachable memory:\n");
553            // TODO - should limit be an argument parameter?
554            std::string s = GetUnreachableMemoryString(true /* contents */, 10000 /* limit */);
555            result.append(s.c_str(), s.size());
556        }
557    }
558    write(fd, result.string(), result.size());
559    return NO_ERROR;
560}
561
562void MediaPlayerService::removeClient(wp<Client> client)
563{
564    Mutex::Autolock lock(mLock);
565    mClients.remove(client);
566}
567
568MediaPlayerService::Client::Client(
569        const sp<MediaPlayerService>& service, pid_t pid,
570        int32_t connId, const sp<IMediaPlayerClient>& client,
571        audio_session_t audioSessionId, uid_t uid)
572{
573    ALOGV("Client(%d) constructor", connId);
574    mPid = pid;
575    mConnId = connId;
576    mService = service;
577    mClient = client;
578    mLoop = false;
579    mStatus = NO_INIT;
580    mAudioSessionId = audioSessionId;
581    mUID = uid;
582    mRetransmitEndpointValid = false;
583    mAudioAttributes = NULL;
584
585#if CALLBACK_ANTAGONIZER
586    ALOGD("create Antagonizer");
587    mAntagonizer = new Antagonizer(notify, this);
588#endif
589}
590
591MediaPlayerService::Client::~Client()
592{
593    ALOGV("Client(%d) destructor pid = %d", mConnId, mPid);
594    mAudioOutput.clear();
595    wp<Client> client(this);
596    disconnect();
597    mService->removeClient(client);
598    if (mAudioAttributes != NULL) {
599        free(mAudioAttributes);
600    }
601}
602
603void MediaPlayerService::Client::disconnect()
604{
605    ALOGV("disconnect(%d) from pid %d", mConnId, mPid);
606    // grab local reference and clear main reference to prevent future
607    // access to object
608    sp<MediaPlayerBase> p;
609    {
610        Mutex::Autolock l(mLock);
611        p = mPlayer;
612        mClient.clear();
613    }
614
615    mPlayer.clear();
616
617    // clear the notification to prevent callbacks to dead client
618    // and reset the player. We assume the player will serialize
619    // access to itself if necessary.
620    if (p != 0) {
621        p->setNotifyCallback(0, 0);
622#if CALLBACK_ANTAGONIZER
623        ALOGD("kill Antagonizer");
624        mAntagonizer->kill();
625#endif
626        p->reset();
627    }
628
629    disconnectNativeWindow();
630
631    IPCThreadState::self()->flushCommands();
632}
633
634sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
635{
636    // determine if we have the right player type
637    sp<MediaPlayerBase> p = mPlayer;
638    if ((p != NULL) && (p->playerType() != playerType)) {
639        ALOGV("delete player");
640        p.clear();
641    }
642    if (p == NULL) {
643        p = MediaPlayerFactory::createPlayer(playerType, this, notify, mPid);
644    }
645
646    if (p != NULL) {
647        p->setUID(mUID);
648    }
649
650    return p;
651}
652
653MediaPlayerService::Client::ServiceDeathNotifier::ServiceDeathNotifier(
654        const sp<IBinder>& service,
655        const sp<MediaPlayerBase>& listener,
656        int which) {
657    mService = service;
658    mListener = listener;
659    mWhich = which;
660}
661
662MediaPlayerService::Client::ServiceDeathNotifier::~ServiceDeathNotifier() {
663    mService->unlinkToDeath(this);
664}
665
666void MediaPlayerService::Client::ServiceDeathNotifier::binderDied(const wp<IBinder>& /*who*/) {
667    sp<MediaPlayerBase> listener = mListener.promote();
668    if (listener != NULL) {
669        listener->sendEvent(MEDIA_ERROR, MEDIA_ERROR_SERVER_DIED, mWhich);
670    } else {
671        ALOGW("listener for process %d death is gone", mWhich);
672    }
673}
674
675sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
676        player_type playerType)
677{
678    ALOGV("player type = %d", playerType);
679
680    // create the right type of player
681    sp<MediaPlayerBase> p = createPlayer(playerType);
682    if (p == NULL) {
683        return p;
684    }
685
686    sp<IServiceManager> sm = defaultServiceManager();
687    sp<IBinder> binder = sm->getService(String16("media.extractor"));
688    mExtractorDeathListener = new ServiceDeathNotifier(binder, p, MEDIAEXTRACTOR_PROCESS_DEATH);
689    binder->linkToDeath(mExtractorDeathListener);
690
691    binder = sm->getService(String16("media.codec"));
692    mCodecDeathListener = new ServiceDeathNotifier(binder, p, MEDIACODEC_PROCESS_DEATH);
693    binder->linkToDeath(mCodecDeathListener);
694
695    binder = sm->getService(String16("media.audio_flinger"));
696    mAudioDeathListener = new ServiceDeathNotifier(binder, p, AUDIO_PROCESS_DEATH);
697    binder->linkToDeath(mAudioDeathListener);
698
699    if (!p->hardwareOutput()) {
700        Mutex::Autolock l(mLock);
701        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
702                mPid, mAudioAttributes);
703        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
704    }
705
706    return p;
707}
708
709void MediaPlayerService::Client::setDataSource_post(
710        const sp<MediaPlayerBase>& p,
711        status_t status)
712{
713    ALOGV(" setDataSource");
714    mStatus = status;
715    if (mStatus != OK) {
716        ALOGE("  error: %d", mStatus);
717        return;
718    }
719
720    // Set the re-transmission endpoint if one was chosen.
721    if (mRetransmitEndpointValid) {
722        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
723        if (mStatus != NO_ERROR) {
724            ALOGE("setRetransmitEndpoint error: %d", mStatus);
725        }
726    }
727
728    if (mStatus == OK) {
729        mPlayer = p;
730    }
731}
732
733status_t MediaPlayerService::Client::setDataSource(
734        const sp<IMediaHTTPService> &httpService,
735        const char *url,
736        const KeyedVector<String8, String8> *headers)
737{
738    ALOGV("setDataSource(%s)", url);
739    if (url == NULL)
740        return UNKNOWN_ERROR;
741
742    if ((strncmp(url, "http://", 7) == 0) ||
743        (strncmp(url, "https://", 8) == 0) ||
744        (strncmp(url, "rtsp://", 7) == 0)) {
745        if (!checkPermission("android.permission.INTERNET")) {
746            return PERMISSION_DENIED;
747        }
748    }
749
750    if (strncmp(url, "content://", 10) == 0) {
751        // get a filedescriptor for the content Uri and
752        // pass it to the setDataSource(fd) method
753
754        String16 url16(url);
755        int fd = android::openContentProviderFile(url16);
756        if (fd < 0)
757        {
758            ALOGE("Couldn't open fd for %s", url);
759            return UNKNOWN_ERROR;
760        }
761        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
762        close(fd);
763        return mStatus;
764    } else {
765        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
766        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
767        if (p == NULL) {
768            return NO_INIT;
769        }
770
771        setDataSource_post(p, p->setDataSource(httpService, url, headers));
772        return mStatus;
773    }
774}
775
776status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
777{
778    ALOGV("setDataSource fd=%d (%s), offset=%lld, length=%lld",
779            fd, nameForFd(fd).c_str(), (long long) offset, (long long) length);
780    struct stat sb;
781    int ret = fstat(fd, &sb);
782    if (ret != 0) {
783        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
784        return UNKNOWN_ERROR;
785    }
786
787    ALOGV("st_dev  = %llu", static_cast<unsigned long long>(sb.st_dev));
788    ALOGV("st_mode = %u", sb.st_mode);
789    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
790    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
791    ALOGV("st_size = %llu", static_cast<unsigned long long>(sb.st_size));
792
793    if (offset >= sb.st_size) {
794        ALOGE("offset error");
795        return UNKNOWN_ERROR;
796    }
797    if (offset + length > sb.st_size) {
798        length = sb.st_size - offset;
799        ALOGV("calculated length = %lld", (long long)length);
800    }
801
802    player_type playerType = MediaPlayerFactory::getPlayerType(this,
803                                                               fd,
804                                                               offset,
805                                                               length);
806    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
807    if (p == NULL) {
808        return NO_INIT;
809    }
810
811    // now set data source
812    setDataSource_post(p, p->setDataSource(fd, offset, length));
813    return mStatus;
814}
815
816status_t MediaPlayerService::Client::setDataSource(
817        const sp<IStreamSource> &source) {
818    // create the right type of player
819    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
820    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
821    if (p == NULL) {
822        return NO_INIT;
823    }
824
825    // now set data source
826    setDataSource_post(p, p->setDataSource(source));
827    return mStatus;
828}
829
830status_t MediaPlayerService::Client::setDataSource(
831        const sp<IDataSource> &source) {
832    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
833    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
834    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
835    if (p == NULL) {
836        return NO_INIT;
837    }
838    // now set data source
839    setDataSource_post(p, p->setDataSource(dataSource));
840    return mStatus;
841}
842
843void MediaPlayerService::Client::disconnectNativeWindow() {
844    if (mConnectedWindow != NULL) {
845        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
846                NATIVE_WINDOW_API_MEDIA);
847
848        if (err != OK) {
849            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
850                    strerror(-err), err);
851        }
852    }
853    mConnectedWindow.clear();
854}
855
856status_t MediaPlayerService::Client::setVideoSurfaceTexture(
857        const sp<IGraphicBufferProducer>& bufferProducer)
858{
859    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
860    sp<MediaPlayerBase> p = getPlayer();
861    if (p == 0) return UNKNOWN_ERROR;
862
863    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
864    if (mConnectedWindowBinder == binder) {
865        return OK;
866    }
867
868    sp<ANativeWindow> anw;
869    if (bufferProducer != NULL) {
870        anw = new Surface(bufferProducer, true /* controlledByApp */);
871        status_t err = native_window_api_connect(anw.get(),
872                NATIVE_WINDOW_API_MEDIA);
873
874        if (err != OK) {
875            ALOGE("setVideoSurfaceTexture failed: %d", err);
876            // Note that we must do the reset before disconnecting from the ANW.
877            // Otherwise queue/dequeue calls could be made on the disconnected
878            // ANW, which may result in errors.
879            reset();
880
881            disconnectNativeWindow();
882
883            return err;
884        }
885    }
886
887    // Note that we must set the player's new GraphicBufferProducer before
888    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
889    // on the disconnected ANW, which may result in errors.
890    status_t err = p->setVideoSurfaceTexture(bufferProducer);
891
892    disconnectNativeWindow();
893
894    mConnectedWindow = anw;
895
896    if (err == OK) {
897        mConnectedWindowBinder = binder;
898    } else {
899        disconnectNativeWindow();
900    }
901
902    return err;
903}
904
905status_t MediaPlayerService::Client::invoke(const Parcel& request,
906                                            Parcel *reply)
907{
908    sp<MediaPlayerBase> p = getPlayer();
909    if (p == NULL) return UNKNOWN_ERROR;
910    return p->invoke(request, reply);
911}
912
913// This call doesn't need to access the native player.
914status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
915{
916    status_t status;
917    media::Metadata::Filter allow, drop;
918
919    if (unmarshallFilter(filter, &allow, &status) &&
920        unmarshallFilter(filter, &drop, &status)) {
921        Mutex::Autolock lock(mLock);
922
923        mMetadataAllow = allow;
924        mMetadataDrop = drop;
925    }
926    return status;
927}
928
929status_t MediaPlayerService::Client::getMetadata(
930        bool update_only, bool /*apply_filter*/, Parcel *reply)
931{
932    sp<MediaPlayerBase> player = getPlayer();
933    if (player == 0) return UNKNOWN_ERROR;
934
935    status_t status;
936    // Placeholder for the return code, updated by the caller.
937    reply->writeInt32(-1);
938
939    media::Metadata::Filter ids;
940
941    // We don't block notifications while we fetch the data. We clear
942    // mMetadataUpdated first so we don't lose notifications happening
943    // during the rest of this call.
944    {
945        Mutex::Autolock lock(mLock);
946        if (update_only) {
947            ids = mMetadataUpdated;
948        }
949        mMetadataUpdated.clear();
950    }
951
952    media::Metadata metadata(reply);
953
954    metadata.appendHeader();
955    status = player->getMetadata(ids, reply);
956
957    if (status != OK) {
958        metadata.resetParcel();
959        ALOGE("getMetadata failed %d", status);
960        return status;
961    }
962
963    // FIXME: Implement filtering on the result. Not critical since
964    // filtering takes place on the update notifications already. This
965    // would be when all the metadata are fetch and a filter is set.
966
967    // Everything is fine, update the metadata length.
968    metadata.updateLength();
969    return OK;
970}
971
972status_t MediaPlayerService::Client::prepareAsync()
973{
974    ALOGV("[%d] prepareAsync", mConnId);
975    sp<MediaPlayerBase> p = getPlayer();
976    if (p == 0) return UNKNOWN_ERROR;
977    status_t ret = p->prepareAsync();
978#if CALLBACK_ANTAGONIZER
979    ALOGD("start Antagonizer");
980    if (ret == NO_ERROR) mAntagonizer->start();
981#endif
982    return ret;
983}
984
985status_t MediaPlayerService::Client::start()
986{
987    ALOGV("[%d] start", mConnId);
988    sp<MediaPlayerBase> p = getPlayer();
989    if (p == 0) return UNKNOWN_ERROR;
990    p->setLooping(mLoop);
991    return p->start();
992}
993
994status_t MediaPlayerService::Client::stop()
995{
996    ALOGV("[%d] stop", mConnId);
997    sp<MediaPlayerBase> p = getPlayer();
998    if (p == 0) return UNKNOWN_ERROR;
999    return p->stop();
1000}
1001
1002status_t MediaPlayerService::Client::pause()
1003{
1004    ALOGV("[%d] pause", mConnId);
1005    sp<MediaPlayerBase> p = getPlayer();
1006    if (p == 0) return UNKNOWN_ERROR;
1007    return p->pause();
1008}
1009
1010status_t MediaPlayerService::Client::isPlaying(bool* state)
1011{
1012    *state = false;
1013    sp<MediaPlayerBase> p = getPlayer();
1014    if (p == 0) return UNKNOWN_ERROR;
1015    *state = p->isPlaying();
1016    ALOGV("[%d] isPlaying: %d", mConnId, *state);
1017    return NO_ERROR;
1018}
1019
1020status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
1021{
1022    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
1023            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
1024    sp<MediaPlayerBase> p = getPlayer();
1025    if (p == 0) return UNKNOWN_ERROR;
1026    return p->setPlaybackSettings(rate);
1027}
1028
1029status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
1030{
1031    sp<MediaPlayerBase> p = getPlayer();
1032    if (p == 0) return UNKNOWN_ERROR;
1033    status_t ret = p->getPlaybackSettings(rate);
1034    if (ret == NO_ERROR) {
1035        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
1036                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
1037    } else {
1038        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
1039    }
1040    return ret;
1041}
1042
1043status_t MediaPlayerService::Client::setSyncSettings(
1044        const AVSyncSettings& sync, float videoFpsHint)
1045{
1046    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1047            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1048    sp<MediaPlayerBase> p = getPlayer();
1049    if (p == 0) return UNKNOWN_ERROR;
1050    return p->setSyncSettings(sync, videoFpsHint);
1051}
1052
1053status_t MediaPlayerService::Client::getSyncSettings(
1054        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1055{
1056    sp<MediaPlayerBase> p = getPlayer();
1057    if (p == 0) return UNKNOWN_ERROR;
1058    status_t ret = p->getSyncSettings(sync, videoFps);
1059    if (ret == NO_ERROR) {
1060        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1061                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1062    } else {
1063        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1064    }
1065    return ret;
1066}
1067
1068status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1069{
1070    ALOGV("getCurrentPosition");
1071    sp<MediaPlayerBase> p = getPlayer();
1072    if (p == 0) return UNKNOWN_ERROR;
1073    status_t ret = p->getCurrentPosition(msec);
1074    if (ret == NO_ERROR) {
1075        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1076    } else {
1077        ALOGE("getCurrentPosition returned %d", ret);
1078    }
1079    return ret;
1080}
1081
1082status_t MediaPlayerService::Client::getDuration(int *msec)
1083{
1084    ALOGV("getDuration");
1085    sp<MediaPlayerBase> p = getPlayer();
1086    if (p == 0) return UNKNOWN_ERROR;
1087    status_t ret = p->getDuration(msec);
1088    if (ret == NO_ERROR) {
1089        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1090    } else {
1091        ALOGE("getDuration returned %d", ret);
1092    }
1093    return ret;
1094}
1095
1096status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1097    ALOGV("setNextPlayer");
1098    Mutex::Autolock l(mLock);
1099    sp<Client> c = static_cast<Client*>(player.get());
1100    mNextClient = c;
1101
1102    if (c != NULL) {
1103        if (mAudioOutput != NULL) {
1104            mAudioOutput->setNextOutput(c->mAudioOutput);
1105        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1106            ALOGE("no current audio output");
1107        }
1108
1109        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1110            mPlayer->setNextPlayer(mNextClient->getPlayer());
1111        }
1112    }
1113
1114    return OK;
1115}
1116
1117status_t MediaPlayerService::Client::seekTo(int msec)
1118{
1119    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1120    sp<MediaPlayerBase> p = getPlayer();
1121    if (p == 0) return UNKNOWN_ERROR;
1122    return p->seekTo(msec);
1123}
1124
1125status_t MediaPlayerService::Client::reset()
1126{
1127    ALOGV("[%d] reset", mConnId);
1128    mRetransmitEndpointValid = false;
1129    sp<MediaPlayerBase> p = getPlayer();
1130    if (p == 0) return UNKNOWN_ERROR;
1131    return p->reset();
1132}
1133
1134status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1135{
1136    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1137    // TODO: for hardware output, call player instead
1138    Mutex::Autolock l(mLock);
1139    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1140    return NO_ERROR;
1141}
1142
1143status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1144{
1145    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1146    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1147    if (mAudioAttributes == NULL) {
1148        return NO_MEMORY;
1149    }
1150    unmarshallAudioAttributes(parcel, mAudioAttributes);
1151
1152    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1153            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1154            mAudioAttributes->tags);
1155
1156    if (mAudioOutput != 0) {
1157        mAudioOutput->setAudioAttributes(mAudioAttributes);
1158    }
1159    return NO_ERROR;
1160}
1161
1162status_t MediaPlayerService::Client::setLooping(int loop)
1163{
1164    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1165    mLoop = loop;
1166    sp<MediaPlayerBase> p = getPlayer();
1167    if (p != 0) return p->setLooping(loop);
1168    return NO_ERROR;
1169}
1170
1171status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1172{
1173    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1174
1175    // for hardware output, call player instead
1176    sp<MediaPlayerBase> p = getPlayer();
1177    {
1178      Mutex::Autolock l(mLock);
1179      if (p != 0 && p->hardwareOutput()) {
1180          MediaPlayerHWInterface* hwp =
1181                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1182          return hwp->setVolume(leftVolume, rightVolume);
1183      } else {
1184          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1185          return NO_ERROR;
1186      }
1187    }
1188
1189    return NO_ERROR;
1190}
1191
1192status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1193{
1194    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1195    Mutex::Autolock l(mLock);
1196    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1197    return NO_ERROR;
1198}
1199
1200status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1201{
1202    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1203    Mutex::Autolock l(mLock);
1204    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1205    return NO_ERROR;
1206}
1207
1208status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1209    ALOGV("[%d] setParameter(%d)", mConnId, key);
1210    switch (key) {
1211    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1212    {
1213        Mutex::Autolock l(mLock);
1214        return setAudioAttributes_l(request);
1215    }
1216    default:
1217        sp<MediaPlayerBase> p = getPlayer();
1218        if (p == 0) { return UNKNOWN_ERROR; }
1219        return p->setParameter(key, request);
1220    }
1221}
1222
1223status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1224    ALOGV("[%d] getParameter(%d)", mConnId, key);
1225    sp<MediaPlayerBase> p = getPlayer();
1226    if (p == 0) return UNKNOWN_ERROR;
1227    return p->getParameter(key, reply);
1228}
1229
1230status_t MediaPlayerService::Client::setRetransmitEndpoint(
1231        const struct sockaddr_in* endpoint) {
1232
1233    if (NULL != endpoint) {
1234        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1235        uint16_t p = ntohs(endpoint->sin_port);
1236        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1237                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1238    } else {
1239        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1240    }
1241
1242    sp<MediaPlayerBase> p = getPlayer();
1243
1244    // Right now, the only valid time to set a retransmit endpoint is before
1245    // player selection has been made (since the presence or absence of a
1246    // retransmit endpoint is going to determine which player is selected during
1247    // setDataSource).
1248    if (p != 0) return INVALID_OPERATION;
1249
1250    if (NULL != endpoint) {
1251        mRetransmitEndpoint = *endpoint;
1252        mRetransmitEndpointValid = true;
1253    } else {
1254        mRetransmitEndpointValid = false;
1255    }
1256
1257    return NO_ERROR;
1258}
1259
1260status_t MediaPlayerService::Client::getRetransmitEndpoint(
1261        struct sockaddr_in* endpoint)
1262{
1263    if (NULL == endpoint)
1264        return BAD_VALUE;
1265
1266    sp<MediaPlayerBase> p = getPlayer();
1267
1268    if (p != NULL)
1269        return p->getRetransmitEndpoint(endpoint);
1270
1271    if (!mRetransmitEndpointValid)
1272        return NO_INIT;
1273
1274    *endpoint = mRetransmitEndpoint;
1275
1276    return NO_ERROR;
1277}
1278
1279void MediaPlayerService::Client::notify(
1280        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1281{
1282    Client* client = static_cast<Client*>(cookie);
1283    if (client == NULL) {
1284        return;
1285    }
1286
1287    sp<IMediaPlayerClient> c;
1288    {
1289        Mutex::Autolock l(client->mLock);
1290        c = client->mClient;
1291        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1292            if (client->mAudioOutput != NULL)
1293                client->mAudioOutput->switchToNextOutput();
1294            client->mNextClient->start();
1295            if (client->mNextClient->mClient != NULL) {
1296                client->mNextClient->mClient->notify(
1297                        MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1298            }
1299        }
1300    }
1301
1302    if (MEDIA_INFO == msg &&
1303        MEDIA_INFO_METADATA_UPDATE == ext1) {
1304        const media::Metadata::Type metadata_type = ext2;
1305
1306        if(client->shouldDropMetadata(metadata_type)) {
1307            return;
1308        }
1309
1310        // Update the list of metadata that have changed. getMetadata
1311        // also access mMetadataUpdated and clears it.
1312        client->addNewMetadataUpdate(metadata_type);
1313    }
1314
1315    if (c != NULL) {
1316        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1317        c->notify(msg, ext1, ext2, obj);
1318    }
1319}
1320
1321
1322bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1323{
1324    Mutex::Autolock lock(mLock);
1325
1326    if (findMetadata(mMetadataDrop, code)) {
1327        return true;
1328    }
1329
1330    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1331        return false;
1332    } else {
1333        return true;
1334    }
1335}
1336
1337
1338void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1339    Mutex::Autolock lock(mLock);
1340    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1341        mMetadataUpdated.add(metadata_type);
1342    }
1343}
1344
1345#if CALLBACK_ANTAGONIZER
1346const int Antagonizer::interval = 10000; // 10 msecs
1347
1348Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1349    mExit(false), mActive(false), mClient(client), mCb(cb)
1350{
1351    createThread(callbackThread, this);
1352}
1353
1354void Antagonizer::kill()
1355{
1356    Mutex::Autolock _l(mLock);
1357    mActive = false;
1358    mExit = true;
1359    mCondition.wait(mLock);
1360}
1361
1362int Antagonizer::callbackThread(void* user)
1363{
1364    ALOGD("Antagonizer started");
1365    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1366    while (!p->mExit) {
1367        if (p->mActive) {
1368            ALOGV("send event");
1369            p->mCb(p->mClient, 0, 0, 0);
1370        }
1371        usleep(interval);
1372    }
1373    Mutex::Autolock _l(p->mLock);
1374    p->mCondition.signal();
1375    ALOGD("Antagonizer stopped");
1376    return 0;
1377}
1378#endif
1379
1380#undef LOG_TAG
1381#define LOG_TAG "AudioSink"
1382MediaPlayerService::AudioOutput::AudioOutput(audio_session_t sessionId, int uid, int pid,
1383        const audio_attributes_t* attr)
1384    : mCallback(NULL),
1385      mCallbackCookie(NULL),
1386      mCallbackData(NULL),
1387      mStreamType(AUDIO_STREAM_MUSIC),
1388      mLeftVolume(1.0),
1389      mRightVolume(1.0),
1390      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1391      mSampleRateHz(0),
1392      mMsecsPerFrame(0),
1393      mFrameSize(0),
1394      mSessionId(sessionId),
1395      mUid(uid),
1396      mPid(pid),
1397      mSendLevel(0.0),
1398      mAuxEffectId(0),
1399      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1400{
1401    ALOGV("AudioOutput(%d)", sessionId);
1402    if (attr != NULL) {
1403        mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1404        if (mAttributes != NULL) {
1405            memcpy(mAttributes, attr, sizeof(audio_attributes_t));
1406            mStreamType = audio_attributes_to_stream_type(attr);
1407        }
1408    } else {
1409        mAttributes = NULL;
1410    }
1411
1412    setMinBufferCount();
1413}
1414
1415MediaPlayerService::AudioOutput::~AudioOutput()
1416{
1417    close();
1418    free(mAttributes);
1419    delete mCallbackData;
1420}
1421
1422//static
1423void MediaPlayerService::AudioOutput::setMinBufferCount()
1424{
1425    char value[PROPERTY_VALUE_MAX];
1426    if (property_get("ro.kernel.qemu", value, 0)) {
1427        mIsOnEmulator = true;
1428        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1429    }
1430}
1431
1432// static
1433bool MediaPlayerService::AudioOutput::isOnEmulator()
1434{
1435    setMinBufferCount(); // benign race wrt other threads
1436    return mIsOnEmulator;
1437}
1438
1439// static
1440int MediaPlayerService::AudioOutput::getMinBufferCount()
1441{
1442    setMinBufferCount(); // benign race wrt other threads
1443    return mMinBufferCount;
1444}
1445
1446ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1447{
1448    Mutex::Autolock lock(mLock);
1449    if (mTrack == 0) return NO_INIT;
1450    return mTrack->frameCount() * mFrameSize;
1451}
1452
1453ssize_t MediaPlayerService::AudioOutput::frameCount() const
1454{
1455    Mutex::Autolock lock(mLock);
1456    if (mTrack == 0) return NO_INIT;
1457    return mTrack->frameCount();
1458}
1459
1460ssize_t MediaPlayerService::AudioOutput::channelCount() const
1461{
1462    Mutex::Autolock lock(mLock);
1463    if (mTrack == 0) return NO_INIT;
1464    return mTrack->channelCount();
1465}
1466
1467ssize_t MediaPlayerService::AudioOutput::frameSize() const
1468{
1469    Mutex::Autolock lock(mLock);
1470    if (mTrack == 0) return NO_INIT;
1471    return mFrameSize;
1472}
1473
1474uint32_t MediaPlayerService::AudioOutput::latency () const
1475{
1476    Mutex::Autolock lock(mLock);
1477    if (mTrack == 0) return 0;
1478    return mTrack->latency();
1479}
1480
1481float MediaPlayerService::AudioOutput::msecsPerFrame() const
1482{
1483    Mutex::Autolock lock(mLock);
1484    return mMsecsPerFrame;
1485}
1486
1487status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1488{
1489    Mutex::Autolock lock(mLock);
1490    if (mTrack == 0) return NO_INIT;
1491    return mTrack->getPosition(position);
1492}
1493
1494status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1495{
1496    Mutex::Autolock lock(mLock);
1497    if (mTrack == 0) return NO_INIT;
1498    return mTrack->getTimestamp(ts);
1499}
1500
1501// TODO: Remove unnecessary calls to getPlayedOutDurationUs()
1502// as it acquires locks and may query the audio driver.
1503//
1504// Some calls could conceivably retrieve extrapolated data instead of
1505// accessing getTimestamp() or getPosition() every time a data buffer with
1506// a media time is received.
1507//
1508// Calculate duration of played samples if played at normal rate (i.e., 1.0).
1509int64_t MediaPlayerService::AudioOutput::getPlayedOutDurationUs(int64_t nowUs) const
1510{
1511    Mutex::Autolock lock(mLock);
1512    if (mTrack == 0 || mSampleRateHz == 0) {
1513        return 0;
1514    }
1515
1516    uint32_t numFramesPlayed;
1517    int64_t numFramesPlayedAt;
1518    AudioTimestamp ts;
1519    static const int64_t kStaleTimestamp100ms = 100000;
1520
1521    status_t res = mTrack->getTimestamp(ts);
1522    if (res == OK) {                 // case 1: mixing audio tracks and offloaded tracks.
1523        numFramesPlayed = ts.mPosition;
1524        numFramesPlayedAt = ts.mTime.tv_sec * 1000000LL + ts.mTime.tv_nsec / 1000;
1525        const int64_t timestampAge = nowUs - numFramesPlayedAt;
1526        if (timestampAge > kStaleTimestamp100ms) {
1527            // This is an audio FIXME.
1528            // getTimestamp returns a timestamp which may come from audio mixing threads.
1529            // After pausing, the MixerThread may go idle, thus the mTime estimate may
1530            // become stale. Assuming that the MixerThread runs 20ms, with FastMixer at 5ms,
1531            // the max latency should be about 25ms with an average around 12ms (to be verified).
1532            // For safety we use 100ms.
1533            ALOGV("getTimestamp: returned stale timestamp nowUs(%lld) numFramesPlayedAt(%lld)",
1534                    (long long)nowUs, (long long)numFramesPlayedAt);
1535            numFramesPlayedAt = nowUs - kStaleTimestamp100ms;
1536        }
1537        //ALOGD("getTimestamp: OK %d %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1538    } else if (res == WOULD_BLOCK) { // case 2: transitory state on start of a new track
1539        numFramesPlayed = 0;
1540        numFramesPlayedAt = nowUs;
1541        //ALOGD("getTimestamp: WOULD_BLOCK %d %lld",
1542        //        numFramesPlayed, (long long)numFramesPlayedAt);
1543    } else {                         // case 3: transitory at new track or audio fast tracks.
1544        res = mTrack->getPosition(&numFramesPlayed);
1545        CHECK_EQ(res, (status_t)OK);
1546        numFramesPlayedAt = nowUs;
1547        numFramesPlayedAt += 1000LL * mTrack->latency() / 2; /* XXX */
1548        //ALOGD("getPosition: %u %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1549    }
1550
1551    // CHECK_EQ(numFramesPlayed & (1 << 31), 0);  // can't be negative until 12.4 hrs, test
1552    // TODO: remove the (int32_t) casting below as it may overflow at 12.4 hours.
1553    int64_t durationUs = (int64_t)((int32_t)numFramesPlayed * 1000000LL / mSampleRateHz)
1554            + nowUs - numFramesPlayedAt;
1555    if (durationUs < 0) {
1556        // Occurs when numFramesPlayed position is very small and the following:
1557        // (1) In case 1, the time nowUs is computed before getTimestamp() is called and
1558        //     numFramesPlayedAt is greater than nowUs by time more than numFramesPlayed.
1559        // (2) In case 3, using getPosition and adding mAudioSink->latency() to
1560        //     numFramesPlayedAt, by a time amount greater than numFramesPlayed.
1561        //
1562        // Both of these are transitory conditions.
1563        ALOGV("getPlayedOutDurationUs: negative duration %lld set to zero", (long long)durationUs);
1564        durationUs = 0;
1565    }
1566    ALOGV("getPlayedOutDurationUs(%lld) nowUs(%lld) frames(%u) framesAt(%lld)",
1567            (long long)durationUs, (long long)nowUs, numFramesPlayed, (long long)numFramesPlayedAt);
1568    return durationUs;
1569}
1570
1571status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1572{
1573    Mutex::Autolock lock(mLock);
1574    if (mTrack == 0) return NO_INIT;
1575    ExtendedTimestamp ets;
1576    status_t status = mTrack->getTimestamp(&ets);
1577    if (status == OK || status == WOULD_BLOCK) {
1578        *frameswritten = (uint32_t)ets.mPosition[ExtendedTimestamp::LOCATION_CLIENT];
1579    }
1580    return status;
1581}
1582
1583status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1584{
1585    Mutex::Autolock lock(mLock);
1586    if (mTrack == 0) return NO_INIT;
1587    return mTrack->setParameters(keyValuePairs);
1588}
1589
1590String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1591{
1592    Mutex::Autolock lock(mLock);
1593    if (mTrack == 0) return String8::empty();
1594    return mTrack->getParameters(keys);
1595}
1596
1597void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1598    Mutex::Autolock lock(mLock);
1599    if (attributes == NULL) {
1600        free(mAttributes);
1601        mAttributes = NULL;
1602    } else {
1603        if (mAttributes == NULL) {
1604            mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1605        }
1606        memcpy(mAttributes, attributes, sizeof(audio_attributes_t));
1607        mStreamType = audio_attributes_to_stream_type(attributes);
1608    }
1609}
1610
1611void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1612{
1613    Mutex::Autolock lock(mLock);
1614    // do not allow direct stream type modification if attributes have been set
1615    if (mAttributes == NULL) {
1616        mStreamType = streamType;
1617    }
1618}
1619
1620void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1621{
1622    ALOGV("deleteRecycledTrack_l");
1623    if (mRecycledTrack != 0) {
1624
1625        if (mCallbackData != NULL) {
1626            mCallbackData->setOutput(NULL);
1627            mCallbackData->endTrackSwitch();
1628        }
1629
1630        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1631            int32_t msec = 0;
1632            if (!mRecycledTrack->stopped()) { // check if active
1633                 (void)mRecycledTrack->pendingDuration(&msec);
1634            }
1635            mRecycledTrack->stop(); // ensure full data drain
1636            ALOGD("deleting recycled track, waiting for data drain (%d msec)", msec);
1637            if (msec > 0) {
1638                static const int32_t WAIT_LIMIT_MS = 3000;
1639                if (msec > WAIT_LIMIT_MS) {
1640                    msec = WAIT_LIMIT_MS;
1641                }
1642                usleep(msec * 1000LL);
1643            }
1644        }
1645        // An offloaded track isn't flushed because the STREAM_END is reported
1646        // slightly prematurely to allow time for the gapless track switch
1647        // but this means that if we decide not to recycle the track there
1648        // could be a small amount of residual data still playing. We leave
1649        // AudioFlinger to drain the track.
1650
1651        mRecycledTrack.clear();
1652        close_l();
1653        delete mCallbackData;
1654        mCallbackData = NULL;
1655    }
1656}
1657
1658void MediaPlayerService::AudioOutput::close_l()
1659{
1660    mTrack.clear();
1661}
1662
1663status_t MediaPlayerService::AudioOutput::open(
1664        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1665        audio_format_t format, int bufferCount,
1666        AudioCallback cb, void *cookie,
1667        audio_output_flags_t flags,
1668        const audio_offload_info_t *offloadInfo,
1669        bool doNotReconnect,
1670        uint32_t suggestedFrameCount)
1671{
1672    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1673                format, bufferCount, mSessionId, flags);
1674
1675    // offloading is only supported in callback mode for now.
1676    // offloadInfo must be present if offload flag is set
1677    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1678            ((cb == NULL) || (offloadInfo == NULL))) {
1679        return BAD_VALUE;
1680    }
1681
1682    // compute frame count for the AudioTrack internal buffer
1683    size_t frameCount;
1684    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1685        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1686    } else {
1687        // try to estimate the buffer processing fetch size from AudioFlinger.
1688        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1689        uint32_t afSampleRate;
1690        size_t afFrameCount;
1691        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1692            return NO_INIT;
1693        }
1694        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1695            return NO_INIT;
1696        }
1697        const size_t framesPerBuffer =
1698                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1699
1700        if (bufferCount == 0) {
1701            // use suggestedFrameCount
1702            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1703        }
1704        // Check argument bufferCount against the mininum buffer count
1705        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1706            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1707            bufferCount = mMinBufferCount;
1708        }
1709        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1710        // which will be the minimum size permitted.
1711        frameCount = bufferCount * framesPerBuffer;
1712    }
1713
1714    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1715        channelMask = audio_channel_out_mask_from_count(channelCount);
1716        if (0 == channelMask) {
1717            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1718            return NO_INIT;
1719        }
1720    }
1721
1722    Mutex::Autolock lock(mLock);
1723    mCallback = cb;
1724    mCallbackCookie = cookie;
1725
1726    // Check whether we can recycle the track
1727    bool reuse = false;
1728    bool bothOffloaded = false;
1729
1730    if (mRecycledTrack != 0) {
1731        // check whether we are switching between two offloaded tracks
1732        bothOffloaded = (flags & mRecycledTrack->getFlags()
1733                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1734
1735        // check if the existing track can be reused as-is, or if a new track needs to be created.
1736        reuse = true;
1737
1738        if ((mCallbackData == NULL && mCallback != NULL) ||
1739                (mCallbackData != NULL && mCallback == NULL)) {
1740            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1741            ALOGV("can't chain callback and write");
1742            reuse = false;
1743        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1744                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1745            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1746                  mRecycledTrack->getSampleRate(), sampleRate,
1747                  mRecycledTrack->channelCount(), channelCount);
1748            reuse = false;
1749        } else if (flags != mFlags) {
1750            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1751            reuse = false;
1752        } else if (mRecycledTrack->format() != format) {
1753            reuse = false;
1754        }
1755    } else {
1756        ALOGV("no track available to recycle");
1757    }
1758
1759    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1760
1761    // If we can't recycle and both tracks are offloaded
1762    // we must close the previous output before opening a new one
1763    if (bothOffloaded && !reuse) {
1764        ALOGV("both offloaded and not recycling");
1765        deleteRecycledTrack_l();
1766    }
1767
1768    sp<AudioTrack> t;
1769    CallbackData *newcbd = NULL;
1770
1771    // We don't attempt to create a new track if we are recycling an
1772    // offloaded track. But, if we are recycling a non-offloaded or we
1773    // are switching where one is offloaded and one isn't then we create
1774    // the new track in advance so that we can read additional stream info
1775
1776    if (!(reuse && bothOffloaded)) {
1777        ALOGV("creating new AudioTrack");
1778
1779        if (mCallback != NULL) {
1780            newcbd = new CallbackData(this);
1781            t = new AudioTrack(
1782                    mStreamType,
1783                    sampleRate,
1784                    format,
1785                    channelMask,
1786                    frameCount,
1787                    flags,
1788                    CallbackWrapper,
1789                    newcbd,
1790                    0,  // notification frames
1791                    mSessionId,
1792                    AudioTrack::TRANSFER_CALLBACK,
1793                    offloadInfo,
1794                    mUid,
1795                    mPid,
1796                    mAttributes,
1797                    doNotReconnect);
1798        } else {
1799            // TODO: Due to buffer memory concerns, we use a max target playback speed
1800            // based on mPlaybackRate at the time of open (instead of kMaxRequiredSpeed),
1801            // also clamping the target speed to 1.0 <= targetSpeed <= kMaxRequiredSpeed.
1802            const float targetSpeed =
1803                    std::min(std::max(mPlaybackRate.mSpeed, 1.0f), kMaxRequiredSpeed);
1804            ALOGW_IF(targetSpeed != mPlaybackRate.mSpeed,
1805                    "track target speed:%f clamped from playback speed:%f",
1806                    targetSpeed, mPlaybackRate.mSpeed);
1807            t = new AudioTrack(
1808                    mStreamType,
1809                    sampleRate,
1810                    format,
1811                    channelMask,
1812                    frameCount,
1813                    flags,
1814                    NULL, // callback
1815                    NULL, // user data
1816                    0, // notification frames
1817                    mSessionId,
1818                    AudioTrack::TRANSFER_DEFAULT,
1819                    NULL, // offload info
1820                    mUid,
1821                    mPid,
1822                    mAttributes,
1823                    doNotReconnect,
1824                    targetSpeed);
1825        }
1826
1827        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1828            ALOGE("Unable to create audio track");
1829            delete newcbd;
1830            // t goes out of scope, so reference count drops to zero
1831            return NO_INIT;
1832        } else {
1833            // successful AudioTrack initialization implies a legacy stream type was generated
1834            // from the audio attributes
1835            mStreamType = t->streamType();
1836        }
1837    }
1838
1839    if (reuse) {
1840        CHECK(mRecycledTrack != NULL);
1841
1842        if (!bothOffloaded) {
1843            if (mRecycledTrack->frameCount() != t->frameCount()) {
1844                ALOGV("framecount differs: %zu/%zu frames",
1845                      mRecycledTrack->frameCount(), t->frameCount());
1846                reuse = false;
1847            }
1848        }
1849
1850        if (reuse) {
1851            ALOGV("chaining to next output and recycling track");
1852            close_l();
1853            mTrack = mRecycledTrack;
1854            mRecycledTrack.clear();
1855            if (mCallbackData != NULL) {
1856                mCallbackData->setOutput(this);
1857            }
1858            delete newcbd;
1859            return OK;
1860        }
1861    }
1862
1863    // we're not going to reuse the track, unblock and flush it
1864    // this was done earlier if both tracks are offloaded
1865    if (!bothOffloaded) {
1866        deleteRecycledTrack_l();
1867    }
1868
1869    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1870
1871    mCallbackData = newcbd;
1872    ALOGV("setVolume");
1873    t->setVolume(mLeftVolume, mRightVolume);
1874
1875    mSampleRateHz = sampleRate;
1876    mFlags = flags;
1877    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1878    mFrameSize = t->frameSize();
1879    mTrack = t;
1880
1881    status_t res = NO_ERROR;
1882    // Note some output devices may give us a direct track even though we don't specify it.
1883    // Example: Line application b/17459982.
1884    if ((t->getFlags() & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1885        res = t->setPlaybackRate(mPlaybackRate);
1886        if (res == NO_ERROR) {
1887            t->setAuxEffectSendLevel(mSendLevel);
1888            res = t->attachAuxEffect(mAuxEffectId);
1889        }
1890    }
1891    ALOGV("open() DONE status %d", res);
1892    return res;
1893}
1894
1895status_t MediaPlayerService::AudioOutput::start()
1896{
1897    ALOGV("start");
1898    Mutex::Autolock lock(mLock);
1899    if (mCallbackData != NULL) {
1900        mCallbackData->endTrackSwitch();
1901    }
1902    if (mTrack != 0) {
1903        mTrack->setVolume(mLeftVolume, mRightVolume);
1904        mTrack->setAuxEffectSendLevel(mSendLevel);
1905        return mTrack->start();
1906    }
1907    return NO_INIT;
1908}
1909
1910void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1911    Mutex::Autolock lock(mLock);
1912    mNextOutput = nextOutput;
1913}
1914
1915void MediaPlayerService::AudioOutput::switchToNextOutput() {
1916    ALOGV("switchToNextOutput");
1917
1918    // Try to acquire the callback lock before moving track (without incurring deadlock).
1919    const unsigned kMaxSwitchTries = 100;
1920    Mutex::Autolock lock(mLock);
1921    for (unsigned tries = 0;;) {
1922        if (mTrack == 0) {
1923            return;
1924        }
1925        if (mNextOutput != NULL && mNextOutput != this) {
1926            if (mCallbackData != NULL) {
1927                // two alternative approaches
1928#if 1
1929                CallbackData *callbackData = mCallbackData;
1930                mLock.unlock();
1931                // proper acquisition sequence
1932                callbackData->lock();
1933                mLock.lock();
1934                // Caution: it is unlikely that someone deleted our callback or changed our target
1935                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1936                    // fatal if we are starved out.
1937                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1938                            "switchToNextOutput() cannot obtain correct lock sequence");
1939                    callbackData->unlock();
1940                    continue;
1941                }
1942                callbackData->mSwitching = true; // begin track switch
1943#else
1944                // tryBeginTrackSwitch() returns false if the callback has the lock.
1945                if (!mCallbackData->tryBeginTrackSwitch()) {
1946                    // fatal if we are starved out.
1947                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1948                            "switchToNextOutput() cannot obtain callback lock");
1949                    mLock.unlock();
1950                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1951                    mLock.lock();
1952                    continue;
1953                }
1954#endif
1955            }
1956
1957            Mutex::Autolock nextLock(mNextOutput->mLock);
1958
1959            // If the next output track is not NULL, then it has been
1960            // opened already for playback.
1961            // This is possible even without the next player being started,
1962            // for example, the next player could be prepared and seeked.
1963            //
1964            // Presuming it isn't advisable to force the track over.
1965             if (mNextOutput->mTrack == NULL) {
1966                ALOGD("Recycling track for gapless playback");
1967                delete mNextOutput->mCallbackData;
1968                mNextOutput->mCallbackData = mCallbackData;
1969                mNextOutput->mRecycledTrack = mTrack;
1970                mNextOutput->mSampleRateHz = mSampleRateHz;
1971                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1972                mNextOutput->mFlags = mFlags;
1973                mNextOutput->mFrameSize = mFrameSize;
1974                close_l();
1975                mCallbackData = NULL;  // destruction handled by mNextOutput
1976            } else {
1977                ALOGW("Ignoring gapless playback because next player has already started");
1978                // remove track in case resource needed for future players.
1979                if (mCallbackData != NULL) {
1980                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1981                }
1982                close_l();
1983            }
1984        }
1985        break;
1986    }
1987}
1988
1989ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1990{
1991    Mutex::Autolock lock(mLock);
1992    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1993
1994    //ALOGV("write(%p, %u)", buffer, size);
1995    if (mTrack != 0) {
1996        return mTrack->write(buffer, size, blocking);
1997    }
1998    return NO_INIT;
1999}
2000
2001void MediaPlayerService::AudioOutput::stop()
2002{
2003    ALOGV("stop");
2004    Mutex::Autolock lock(mLock);
2005    if (mTrack != 0) mTrack->stop();
2006}
2007
2008void MediaPlayerService::AudioOutput::flush()
2009{
2010    ALOGV("flush");
2011    Mutex::Autolock lock(mLock);
2012    if (mTrack != 0) mTrack->flush();
2013}
2014
2015void MediaPlayerService::AudioOutput::pause()
2016{
2017    ALOGV("pause");
2018    Mutex::Autolock lock(mLock);
2019    if (mTrack != 0) mTrack->pause();
2020}
2021
2022void MediaPlayerService::AudioOutput::close()
2023{
2024    ALOGV("close");
2025    sp<AudioTrack> track;
2026    {
2027        Mutex::Autolock lock(mLock);
2028        track = mTrack;
2029        close_l(); // clears mTrack
2030    }
2031    // destruction of the track occurs outside of mutex.
2032}
2033
2034void MediaPlayerService::AudioOutput::setVolume(float left, float right)
2035{
2036    ALOGV("setVolume(%f, %f)", left, right);
2037    Mutex::Autolock lock(mLock);
2038    mLeftVolume = left;
2039    mRightVolume = right;
2040    if (mTrack != 0) {
2041        mTrack->setVolume(left, right);
2042    }
2043}
2044
2045status_t MediaPlayerService::AudioOutput::setPlaybackRate(const AudioPlaybackRate &rate)
2046{
2047    ALOGV("setPlaybackRate(%f %f %d %d)",
2048                rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
2049    Mutex::Autolock lock(mLock);
2050    if (mTrack == 0) {
2051        // remember rate so that we can set it when the track is opened
2052        mPlaybackRate = rate;
2053        return OK;
2054    }
2055    status_t res = mTrack->setPlaybackRate(rate);
2056    if (res != NO_ERROR) {
2057        return res;
2058    }
2059    // rate.mSpeed is always greater than 0 if setPlaybackRate succeeded
2060    CHECK_GT(rate.mSpeed, 0.f);
2061    mPlaybackRate = rate;
2062    if (mSampleRateHz != 0) {
2063        mMsecsPerFrame = 1E3f / (rate.mSpeed * mSampleRateHz);
2064    }
2065    return res;
2066}
2067
2068status_t MediaPlayerService::AudioOutput::getPlaybackRate(AudioPlaybackRate *rate)
2069{
2070    ALOGV("setPlaybackRate");
2071    Mutex::Autolock lock(mLock);
2072    if (mTrack == 0) {
2073        return NO_INIT;
2074    }
2075    *rate = mTrack->getPlaybackRate();
2076    return NO_ERROR;
2077}
2078
2079status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
2080{
2081    ALOGV("setAuxEffectSendLevel(%f)", level);
2082    Mutex::Autolock lock(mLock);
2083    mSendLevel = level;
2084    if (mTrack != 0) {
2085        return mTrack->setAuxEffectSendLevel(level);
2086    }
2087    return NO_ERROR;
2088}
2089
2090status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
2091{
2092    ALOGV("attachAuxEffect(%d)", effectId);
2093    Mutex::Autolock lock(mLock);
2094    mAuxEffectId = effectId;
2095    if (mTrack != 0) {
2096        return mTrack->attachAuxEffect(effectId);
2097    }
2098    return NO_ERROR;
2099}
2100
2101// static
2102void MediaPlayerService::AudioOutput::CallbackWrapper(
2103        int event, void *cookie, void *info) {
2104    //ALOGV("callbackwrapper");
2105    CallbackData *data = (CallbackData*)cookie;
2106    // lock to ensure we aren't caught in the middle of a track switch.
2107    data->lock();
2108    AudioOutput *me = data->getOutput();
2109    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
2110    if (me == NULL) {
2111        // no output set, likely because the track was scheduled to be reused
2112        // by another player, but the format turned out to be incompatible.
2113        data->unlock();
2114        if (buffer != NULL) {
2115            buffer->size = 0;
2116        }
2117        return;
2118    }
2119
2120    switch(event) {
2121    case AudioTrack::EVENT_MORE_DATA: {
2122        size_t actualSize = (*me->mCallback)(
2123                me, buffer->raw, buffer->size, me->mCallbackCookie,
2124                CB_EVENT_FILL_BUFFER);
2125
2126        // Log when no data is returned from the callback.
2127        // (1) We may have no data (especially with network streaming sources).
2128        // (2) We may have reached the EOS and the audio track is not stopped yet.
2129        // Note that AwesomePlayer/AudioPlayer will only return zero size when it reaches the EOS.
2130        // NuPlayerRenderer will return zero when it doesn't have data (it doesn't block to fill).
2131        //
2132        // This is a benign busy-wait, with the next data request generated 10 ms or more later;
2133        // nevertheless for power reasons, we don't want to see too many of these.
2134
2135        ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
2136
2137        buffer->size = actualSize;
2138        } break;
2139
2140    case AudioTrack::EVENT_STREAM_END:
2141        // currently only occurs for offloaded callbacks
2142        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
2143        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
2144                me->mCallbackCookie, CB_EVENT_STREAM_END);
2145        break;
2146
2147    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
2148        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
2149        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
2150                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
2151        break;
2152
2153    case AudioTrack::EVENT_UNDERRUN:
2154        // This occurs when there is no data available, typically
2155        // when there is a failure to supply data to the AudioTrack.  It can also
2156        // occur in non-offloaded mode when the audio device comes out of standby.
2157        //
2158        // If an AudioTrack underruns it outputs silence. Since this happens suddenly
2159        // it may sound like an audible pop or glitch.
2160        //
2161        // The underrun event is sent once per track underrun; the condition is reset
2162        // when more data is sent to the AudioTrack.
2163        ALOGI("callbackwrapper: EVENT_UNDERRUN (discarded)");
2164        break;
2165
2166    default:
2167        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
2168    }
2169
2170    data->unlock();
2171}
2172
2173audio_session_t MediaPlayerService::AudioOutput::getSessionId() const
2174{
2175    Mutex::Autolock lock(mLock);
2176    return mSessionId;
2177}
2178
2179uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
2180{
2181    Mutex::Autolock lock(mLock);
2182    if (mTrack == 0) return 0;
2183    return mTrack->getSampleRate();
2184}
2185
2186int64_t MediaPlayerService::AudioOutput::getBufferDurationInUs() const
2187{
2188    Mutex::Autolock lock(mLock);
2189    if (mTrack == 0) {
2190        return 0;
2191    }
2192    int64_t duration;
2193    if (mTrack->getBufferDurationInUs(&duration) != OK) {
2194        return 0;
2195    }
2196    return duration;
2197}
2198
2199////////////////////////////////////////////////////////////////////////////////
2200
2201struct CallbackThread : public Thread {
2202    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
2203                   MediaPlayerBase::AudioSink::AudioCallback cb,
2204                   void *cookie);
2205
2206protected:
2207    virtual ~CallbackThread();
2208
2209    virtual bool threadLoop();
2210
2211private:
2212    wp<MediaPlayerBase::AudioSink> mSink;
2213    MediaPlayerBase::AudioSink::AudioCallback mCallback;
2214    void *mCookie;
2215    void *mBuffer;
2216    size_t mBufferSize;
2217
2218    CallbackThread(const CallbackThread &);
2219    CallbackThread &operator=(const CallbackThread &);
2220};
2221
2222CallbackThread::CallbackThread(
2223        const wp<MediaPlayerBase::AudioSink> &sink,
2224        MediaPlayerBase::AudioSink::AudioCallback cb,
2225        void *cookie)
2226    : mSink(sink),
2227      mCallback(cb),
2228      mCookie(cookie),
2229      mBuffer(NULL),
2230      mBufferSize(0) {
2231}
2232
2233CallbackThread::~CallbackThread() {
2234    if (mBuffer) {
2235        free(mBuffer);
2236        mBuffer = NULL;
2237    }
2238}
2239
2240bool CallbackThread::threadLoop() {
2241    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
2242    if (sink == NULL) {
2243        return false;
2244    }
2245
2246    if (mBuffer == NULL) {
2247        mBufferSize = sink->bufferSize();
2248        mBuffer = malloc(mBufferSize);
2249    }
2250
2251    size_t actualSize =
2252        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
2253                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
2254
2255    if (actualSize > 0) {
2256        sink->write(mBuffer, actualSize);
2257        // Could return false on sink->write() error or short count.
2258        // Not necessarily appropriate but would work for AudioCache behavior.
2259    }
2260
2261    return true;
2262}
2263
2264////////////////////////////////////////////////////////////////////////////////
2265
2266void MediaPlayerService::addBatteryData(uint32_t params)
2267{
2268    Mutex::Autolock lock(mLock);
2269
2270    int32_t time = systemTime() / 1000000L;
2271
2272    // change audio output devices. This notification comes from AudioFlinger
2273    if ((params & kBatteryDataSpeakerOn)
2274            || (params & kBatteryDataOtherAudioDeviceOn)) {
2275
2276        int deviceOn[NUM_AUDIO_DEVICES];
2277        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2278            deviceOn[i] = 0;
2279        }
2280
2281        if ((params & kBatteryDataSpeakerOn)
2282                && (params & kBatteryDataOtherAudioDeviceOn)) {
2283            deviceOn[SPEAKER_AND_OTHER] = 1;
2284        } else if (params & kBatteryDataSpeakerOn) {
2285            deviceOn[SPEAKER] = 1;
2286        } else {
2287            deviceOn[OTHER_AUDIO_DEVICE] = 1;
2288        }
2289
2290        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2291            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
2292
2293                if (mBatteryAudio.refCount > 0) { // if playing audio
2294                    if (!deviceOn[i]) {
2295                        mBatteryAudio.lastTime[i] += time;
2296                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2297                        mBatteryAudio.lastTime[i] = 0;
2298                    } else {
2299                        mBatteryAudio.lastTime[i] = 0 - time;
2300                    }
2301                }
2302
2303                mBatteryAudio.deviceOn[i] = deviceOn[i];
2304            }
2305        }
2306        return;
2307    }
2308
2309    // an audio stream is started
2310    if (params & kBatteryDataAudioFlingerStart) {
2311        // record the start time only if currently no other audio
2312        // is being played
2313        if (mBatteryAudio.refCount == 0) {
2314            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2315                if (mBatteryAudio.deviceOn[i]) {
2316                    mBatteryAudio.lastTime[i] -= time;
2317                }
2318            }
2319        }
2320
2321        mBatteryAudio.refCount ++;
2322        return;
2323
2324    } else if (params & kBatteryDataAudioFlingerStop) {
2325        if (mBatteryAudio.refCount <= 0) {
2326            ALOGW("Battery track warning: refCount is <= 0");
2327            return;
2328        }
2329
2330        // record the stop time only if currently this is the only
2331        // audio being played
2332        if (mBatteryAudio.refCount == 1) {
2333            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2334                if (mBatteryAudio.deviceOn[i]) {
2335                    mBatteryAudio.lastTime[i] += time;
2336                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2337                    mBatteryAudio.lastTime[i] = 0;
2338                }
2339            }
2340        }
2341
2342        mBatteryAudio.refCount --;
2343        return;
2344    }
2345
2346    int uid = IPCThreadState::self()->getCallingUid();
2347    if (uid == AID_MEDIA) {
2348        return;
2349    }
2350    int index = mBatteryData.indexOfKey(uid);
2351
2352    if (index < 0) { // create a new entry for this UID
2353        BatteryUsageInfo info;
2354        info.audioTotalTime = 0;
2355        info.videoTotalTime = 0;
2356        info.audioLastTime = 0;
2357        info.videoLastTime = 0;
2358        info.refCount = 0;
2359
2360        if (mBatteryData.add(uid, info) == NO_MEMORY) {
2361            ALOGE("Battery track error: no memory for new app");
2362            return;
2363        }
2364    }
2365
2366    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
2367
2368    if (params & kBatteryDataCodecStarted) {
2369        if (params & kBatteryDataTrackAudio) {
2370            info.audioLastTime -= time;
2371            info.refCount ++;
2372        }
2373        if (params & kBatteryDataTrackVideo) {
2374            info.videoLastTime -= time;
2375            info.refCount ++;
2376        }
2377    } else {
2378        if (info.refCount == 0) {
2379            ALOGW("Battery track warning: refCount is already 0");
2380            return;
2381        } else if (info.refCount < 0) {
2382            ALOGE("Battery track error: refCount < 0");
2383            mBatteryData.removeItem(uid);
2384            return;
2385        }
2386
2387        if (params & kBatteryDataTrackAudio) {
2388            info.audioLastTime += time;
2389            info.refCount --;
2390        }
2391        if (params & kBatteryDataTrackVideo) {
2392            info.videoLastTime += time;
2393            info.refCount --;
2394        }
2395
2396        // no stream is being played by this UID
2397        if (info.refCount == 0) {
2398            info.audioTotalTime += info.audioLastTime;
2399            info.audioLastTime = 0;
2400            info.videoTotalTime += info.videoLastTime;
2401            info.videoLastTime = 0;
2402        }
2403    }
2404}
2405
2406status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2407    Mutex::Autolock lock(mLock);
2408
2409    // audio output devices usage
2410    int32_t time = systemTime() / 1000000L; //in ms
2411    int32_t totalTime;
2412
2413    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2414        totalTime = mBatteryAudio.totalTime[i];
2415
2416        if (mBatteryAudio.deviceOn[i]
2417            && (mBatteryAudio.lastTime[i] != 0)) {
2418                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2419                totalTime += tmpTime;
2420        }
2421
2422        reply->writeInt32(totalTime);
2423        // reset the total time
2424        mBatteryAudio.totalTime[i] = 0;
2425   }
2426
2427    // codec usage
2428    BatteryUsageInfo info;
2429    int size = mBatteryData.size();
2430
2431    reply->writeInt32(size);
2432    int i = 0;
2433
2434    while (i < size) {
2435        info = mBatteryData.valueAt(i);
2436
2437        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2438        reply->writeInt32(info.audioTotalTime);
2439        reply->writeInt32(info.videoTotalTime);
2440
2441        info.audioTotalTime = 0;
2442        info.videoTotalTime = 0;
2443
2444        // remove the UID entry where no stream is being played
2445        if (info.refCount <= 0) {
2446            mBatteryData.removeItemsAt(i);
2447            size --;
2448            i --;
2449        }
2450        i++;
2451    }
2452    return NO_ERROR;
2453}
2454} // namespace android
2455