MediaPlayerService.cpp revision c5de09127e9e0d5df7aa587be317e1487d793245 
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 "HDCP.h"
82#include "HTTPBase.h"
83#include "RemoteDisplay.h"
84
85namespace {
86using android::media::Metadata;
87using android::status_t;
88using android::OK;
89using android::BAD_VALUE;
90using android::NOT_ENOUGH_DATA;
91using android::Parcel;
92
93// Max number of entries in the filter.
94const int kMaxFilterSize = 64;  // I pulled that out of thin air.
95
96const float kMaxRequiredSpeed = 8.0f; // for PCM tracks allow up to 8x speedup.
97
98// FIXME: Move all the metadata related function in the Metadata.cpp
99
100
101// Unmarshall a filter from a Parcel.
102// Filter format in a parcel:
103//
104//  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
105// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
106// |                       number of entries (n)                   |
107// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
108// |                       metadata type 1                         |
109// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
110// |                       metadata type 2                         |
111// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
112//  ....
113// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
114// |                       metadata type n                         |
115// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
116//
117// @param p Parcel that should start with a filter.
118// @param[out] filter On exit contains the list of metadata type to be
119//                    filtered.
120// @param[out] status On exit contains the status code to be returned.
121// @return true if the parcel starts with a valid filter.
122bool unmarshallFilter(const Parcel& p,
123                      Metadata::Filter *filter,
124                      status_t *status)
125{
126    int32_t val;
127    if (p.readInt32(&val) != OK)
128    {
129        ALOGE("Failed to read filter's length");
130        *status = NOT_ENOUGH_DATA;
131        return false;
132    }
133
134    if( val > kMaxFilterSize || val < 0)
135    {
136        ALOGE("Invalid filter len %d", val);
137        *status = BAD_VALUE;
138        return false;
139    }
140
141    const size_t num = val;
142
143    filter->clear();
144    filter->setCapacity(num);
145
146    size_t size = num * sizeof(Metadata::Type);
147
148
149    if (p.dataAvail() < size)
150    {
151        ALOGE("Filter too short expected %zu but got %zu", size, p.dataAvail());
152        *status = NOT_ENOUGH_DATA;
153        return false;
154    }
155
156    const Metadata::Type *data =
157            static_cast<const Metadata::Type*>(p.readInplace(size));
158
159    if (NULL == data)
160    {
161        ALOGE("Filter had no data");
162        *status = BAD_VALUE;
163        return false;
164    }
165
166    // TODO: The stl impl of vector would be more efficient here
167    // because it degenerates into a memcpy on pod types. Try to
168    // replace later or use stl::set.
169    for (size_t i = 0; i < num; ++i)
170    {
171        filter->add(*data);
172        ++data;
173    }
174    *status = OK;
175    return true;
176}
177
178// @param filter Of metadata type.
179// @param val To be searched.
180// @return true if a match was found.
181bool findMetadata(const Metadata::Filter& filter, const int32_t val)
182{
183    // Deal with empty and ANY right away
184    if (filter.isEmpty()) return false;
185    if (filter[0] == Metadata::kAny) return true;
186
187    return filter.indexOf(val) >= 0;
188}
189
190}  // anonymous namespace
191
192
193namespace {
194using android::Parcel;
195using android::String16;
196
197// marshalling tag indicating flattened utf16 tags
198// keep in sync with frameworks/base/media/java/android/media/AudioAttributes.java
199const int32_t kAudioAttributesMarshallTagFlattenTags = 1;
200
201// Audio attributes format in a parcel:
202//
203//  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
204// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
205// |                       usage                                   |
206// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
207// |                       content_type                            |
208// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
209// |                       source                                  |
210// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
211// |                       flags                                   |
212// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
213// |                       kAudioAttributesMarshallTagFlattenTags  | // ignore tags if not found
214// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
215// |                       flattened tags in UTF16                 |
216// |                         ...                                   |
217// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
218//
219// @param p Parcel that contains audio attributes.
220// @param[out] attributes On exit points to an initialized audio_attributes_t structure
221// @param[out] status On exit contains the status code to be returned.
222void unmarshallAudioAttributes(const Parcel& parcel, audio_attributes_t *attributes)
223{
224    attributes->usage = (audio_usage_t) parcel.readInt32();
225    attributes->content_type = (audio_content_type_t) parcel.readInt32();
226    attributes->source = (audio_source_t) parcel.readInt32();
227    attributes->flags = (audio_flags_mask_t) parcel.readInt32();
228    const bool hasFlattenedTag = (parcel.readInt32() == kAudioAttributesMarshallTagFlattenTags);
229    if (hasFlattenedTag) {
230        // the tags are UTF16, convert to UTF8
231        String16 tags = parcel.readString16();
232        ssize_t realTagSize = utf16_to_utf8_length(tags.string(), tags.size());
233        if (realTagSize <= 0) {
234            strcpy(attributes->tags, "");
235        } else {
236            // copy the flattened string into the attributes as the destination for the conversion:
237            // copying array size -1, array for tags was calloc'd, no need to NULL-terminate it
238            size_t tagSize = realTagSize > AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 ?
239                    AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 : realTagSize;
240            utf16_to_utf8(tags.string(), tagSize, attributes->tags,
241                    sizeof(attributes->tags) / sizeof(attributes->tags[0]));
242        }
243    } else {
244        ALOGE("unmarshallAudioAttributes() received unflattened tags, ignoring tag values");
245        strcpy(attributes->tags, "");
246    }
247}
248} // anonymous namespace
249
250
251namespace android {
252
253extern ALooperRoster gLooperRoster;
254
255
256static bool checkPermission(const char* permissionString) {
257    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
258    bool ok = checkCallingPermission(String16(permissionString));
259    if (!ok) ALOGE("Request requires %s", permissionString);
260    return ok;
261}
262
263// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
264/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
265/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
266
267void MediaPlayerService::instantiate() {
268    defaultServiceManager()->addService(
269            String16("media.player"), new MediaPlayerService());
270}
271
272MediaPlayerService::MediaPlayerService()
273{
274    ALOGV("MediaPlayerService created");
275    mNextConnId = 1;
276
277    mBatteryAudio.refCount = 0;
278    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
279        mBatteryAudio.deviceOn[i] = 0;
280        mBatteryAudio.lastTime[i] = 0;
281        mBatteryAudio.totalTime[i] = 0;
282    }
283    // speaker is on by default
284    mBatteryAudio.deviceOn[SPEAKER] = 1;
285
286    // reset battery stats
287    // if the mediaserver has crashed, battery stats could be left
288    // in bad state, reset the state upon service start.
289    BatteryNotifier::getInstance().noteResetVideo();
290
291    MediaPlayerFactory::registerBuiltinFactories();
292}
293
294MediaPlayerService::~MediaPlayerService()
295{
296    ALOGV("MediaPlayerService destroyed");
297}
298
299sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(const String16 &opPackageName)
300{
301    pid_t pid = IPCThreadState::self()->getCallingPid();
302    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid, opPackageName);
303    wp<MediaRecorderClient> w = recorder;
304    Mutex::Autolock lock(mLock);
305    mMediaRecorderClients.add(w);
306    ALOGV("Create new media recorder client from pid %d", pid);
307    return recorder;
308}
309
310void MediaPlayerService::removeMediaRecorderClient(const wp<MediaRecorderClient>& client)
311{
312    Mutex::Autolock lock(mLock);
313    mMediaRecorderClients.remove(client);
314    ALOGV("Delete media recorder client");
315}
316
317sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
318{
319    pid_t pid = IPCThreadState::self()->getCallingPid();
320    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
321    ALOGV("Create new media retriever from pid %d", pid);
322    return retriever;
323}
324
325sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
326        audio_session_t audioSessionId)
327{
328    pid_t pid = IPCThreadState::self()->getCallingPid();
329    int32_t connId = android_atomic_inc(&mNextConnId);
330
331    sp<Client> c = new Client(
332            this, pid, connId, client, audioSessionId,
333            IPCThreadState::self()->getCallingUid());
334
335    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
336         IPCThreadState::self()->getCallingUid());
337
338    wp<Client> w = c;
339    {
340        Mutex::Autolock lock(mLock);
341        mClients.add(w);
342    }
343    return c;
344}
345
346sp<IMediaCodecList> MediaPlayerService::getCodecList() const {
347    return MediaCodecList::getLocalInstance();
348}
349
350sp<IOMX> MediaPlayerService::getOMX() {
351    ALOGI("MediaPlayerService::getOMX");
352    Mutex::Autolock autoLock(mLock);
353
354    if (mOMX.get() == NULL) {
355        mOMX = new OMX;
356    }
357
358    return mOMX;
359}
360
361sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
362    return new HDCP(createEncryptionModule);
363}
364
365sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
366        const String16 &opPackageName,
367        const sp<IRemoteDisplayClient>& client, const String8& iface) {
368    if (!checkPermission("android.permission.CONTROL_WIFI_DISPLAY")) {
369        return NULL;
370    }
371
372    return new RemoteDisplay(opPackageName, client, iface.string());
373}
374
375status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
376{
377    const size_t SIZE = 256;
378    char buffer[SIZE];
379    String8 result;
380
381    result.append(" AudioOutput\n");
382    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
383            mStreamType, mLeftVolume, mRightVolume);
384    result.append(buffer);
385    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
386            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
387    result.append(buffer);
388    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
389            mAuxEffectId, mSendLevel);
390    result.append(buffer);
391
392    ::write(fd, result.string(), result.size());
393    if (mTrack != 0) {
394        mTrack->dump(fd, args);
395    }
396    return NO_ERROR;
397}
398
399status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args)
400{
401    const size_t SIZE = 256;
402    char buffer[SIZE];
403    String8 result;
404    result.append(" Client\n");
405    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
406            mPid, mConnId, mStatus, mLoop?"true": "false");
407    result.append(buffer);
408    write(fd, result.string(), result.size());
409    if (mPlayer != NULL) {
410        mPlayer->dump(fd, args);
411    }
412    if (mAudioOutput != 0) {
413        mAudioOutput->dump(fd, args);
414    }
415    write(fd, "\n", 1);
416    return NO_ERROR;
417}
418
419/**
420 * The only arguments this understands right now are -c, -von and -voff,
421 * which are parsed by ALooperRoster::dump()
422 */
423status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
424{
425    const size_t SIZE = 256;
426    char buffer[SIZE];
427    String8 result;
428    SortedVector< sp<Client> > clients; //to serialise the mutex unlock & client destruction.
429    SortedVector< sp<MediaRecorderClient> > mediaRecorderClients;
430
431    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
432        snprintf(buffer, SIZE, "Permission Denial: "
433                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
434                IPCThreadState::self()->getCallingPid(),
435                IPCThreadState::self()->getCallingUid());
436        result.append(buffer);
437    } else {
438        Mutex::Autolock lock(mLock);
439        for (int i = 0, n = mClients.size(); i < n; ++i) {
440            sp<Client> c = mClients[i].promote();
441            if (c != 0) c->dump(fd, args);
442            clients.add(c);
443        }
444        if (mMediaRecorderClients.size() == 0) {
445                result.append(" No media recorder client\n\n");
446        } else {
447            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
448                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
449                if (c != 0) {
450                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
451                    result.append(buffer);
452                    write(fd, result.string(), result.size());
453                    result = "\n";
454                    c->dump(fd, args);
455                    mediaRecorderClients.add(c);
456                }
457            }
458        }
459
460        result.append(" Files opened and/or mapped:\n");
461        snprintf(buffer, SIZE, "/proc/%d/maps", getpid());
462        FILE *f = fopen(buffer, "r");
463        if (f) {
464            while (!feof(f)) {
465                fgets(buffer, SIZE, f);
466                if (strstr(buffer, " /storage/") ||
467                    strstr(buffer, " /system/sounds/") ||
468                    strstr(buffer, " /data/") ||
469                    strstr(buffer, " /system/media/")) {
470                    result.append("  ");
471                    result.append(buffer);
472                }
473            }
474            fclose(f);
475        } else {
476            result.append("couldn't open ");
477            result.append(buffer);
478            result.append("\n");
479        }
480
481        snprintf(buffer, SIZE, "/proc/%d/fd", getpid());
482        DIR *d = opendir(buffer);
483        if (d) {
484            struct dirent *ent;
485            while((ent = readdir(d)) != NULL) {
486                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
487                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", getpid(), ent->d_name);
488                    struct stat s;
489                    if (lstat(buffer, &s) == 0) {
490                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
491                            char linkto[256];
492                            int len = readlink(buffer, linkto, sizeof(linkto));
493                            if(len > 0) {
494                                if(len > 255) {
495                                    linkto[252] = '.';
496                                    linkto[253] = '.';
497                                    linkto[254] = '.';
498                                    linkto[255] = 0;
499                                } else {
500                                    linkto[len] = 0;
501                                }
502                                if (strstr(linkto, "/storage/") == linkto ||
503                                    strstr(linkto, "/system/sounds/") == linkto ||
504                                    strstr(linkto, "/data/") == linkto ||
505                                    strstr(linkto, "/system/media/") == linkto) {
506                                    result.append("  ");
507                                    result.append(buffer);
508                                    result.append(" -> ");
509                                    result.append(linkto);
510                                    result.append("\n");
511                                }
512                            }
513                        } else {
514                            result.append("  unexpected type for ");
515                            result.append(buffer);
516                            result.append("\n");
517                        }
518                    }
519                }
520            }
521            closedir(d);
522        } else {
523            result.append("couldn't open ");
524            result.append(buffer);
525            result.append("\n");
526        }
527
528        gLooperRoster.dump(fd, args);
529
530        bool dumpMem = false;
531        bool unreachableMemory = false;
532        for (size_t i = 0; i < args.size(); i++) {
533            if (args[i] == String16("-m")) {
534                dumpMem = true;
535            } else if (args[i] == String16("--unreachable")) {
536                unreachableMemory = true;
537            }
538        }
539        if (dumpMem) {
540            result.append("\nDumping memory:\n");
541            std::string s = dumpMemoryAddresses(100 /* limit */);
542            result.append(s.c_str(), s.size());
543        }
544        if (unreachableMemory) {
545            result.append("\nDumping unreachable memory:\n");
546            // TODO - should limit be an argument parameter?
547            std::string s = GetUnreachableMemoryString(true /* contents */, 10000 /* limit */);
548            result.append(s.c_str(), s.size());
549        }
550    }
551    write(fd, result.string(), result.size());
552    return NO_ERROR;
553}
554
555void MediaPlayerService::removeClient(const wp<Client>& client)
556{
557    Mutex::Autolock lock(mLock);
558    mClients.remove(client);
559}
560
561bool MediaPlayerService::hasClient(wp<Client> client)
562{
563    Mutex::Autolock lock(mLock);
564    return mClients.indexOf(client) != NAME_NOT_FOUND;
565}
566
567MediaPlayerService::Client::Client(
568        const sp<MediaPlayerService>& service, pid_t pid,
569        int32_t connId, const sp<IMediaPlayerClient>& client,
570        audio_session_t audioSessionId, uid_t uid)
571{
572    ALOGV("Client(%d) constructor", connId);
573    mPid = pid;
574    mConnId = connId;
575    mService = service;
576    mClient = client;
577    mLoop = false;
578    mStatus = NO_INIT;
579    mAudioSessionId = audioSessionId;
580    mUID = uid;
581    mRetransmitEndpointValid = false;
582    mAudioAttributes = NULL;
583
584#if CALLBACK_ANTAGONIZER
585    ALOGD("create Antagonizer");
586    mAntagonizer = new Antagonizer(notify, this);
587#endif
588}
589
590MediaPlayerService::Client::~Client()
591{
592    ALOGV("Client(%d) destructor pid = %d", mConnId, mPid);
593    mAudioOutput.clear();
594    wp<Client> client(this);
595    disconnect();
596    mService->removeClient(client);
597    if (mAudioAttributes != NULL) {
598        free(mAudioAttributes);
599    }
600}
601
602void MediaPlayerService::Client::disconnect()
603{
604    ALOGV("disconnect(%d) from pid %d", mConnId, mPid);
605    // grab local reference and clear main reference to prevent future
606    // access to object
607    sp<MediaPlayerBase> p;
608    {
609        Mutex::Autolock l(mLock);
610        p = mPlayer;
611        mClient.clear();
612    }
613
614    mPlayer.clear();
615
616    // clear the notification to prevent callbacks to dead client
617    // and reset the player. We assume the player will serialize
618    // access to itself if necessary.
619    if (p != 0) {
620        p->setNotifyCallback(0, 0);
621#if CALLBACK_ANTAGONIZER
622        ALOGD("kill Antagonizer");
623        mAntagonizer->kill();
624#endif
625        p->reset();
626    }
627
628    disconnectNativeWindow();
629
630    IPCThreadState::self()->flushCommands();
631}
632
633sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
634{
635    // determine if we have the right player type
636    sp<MediaPlayerBase> p = mPlayer;
637    if ((p != NULL) && (p->playerType() != playerType)) {
638        ALOGV("delete player");
639        p.clear();
640    }
641    if (p == NULL) {
642        p = MediaPlayerFactory::createPlayer(playerType, this, notify, mPid);
643    }
644
645    if (p != NULL) {
646        p->setUID(mUID);
647    }
648
649    return p;
650}
651
652MediaPlayerService::Client::ServiceDeathNotifier::ServiceDeathNotifier(
653        const sp<IBinder>& service,
654        const sp<MediaPlayerBase>& listener,
655        int which) {
656    mService = service;
657    mListener = listener;
658    mWhich = which;
659}
660
661MediaPlayerService::Client::ServiceDeathNotifier::~ServiceDeathNotifier() {
662    mService->unlinkToDeath(this);
663}
664
665void MediaPlayerService::Client::ServiceDeathNotifier::binderDied(const wp<IBinder>& /*who*/) {
666    sp<MediaPlayerBase> listener = mListener.promote();
667    if (listener != NULL) {
668        listener->sendEvent(MEDIA_ERROR, MEDIA_ERROR_SERVER_DIED, mWhich);
669    } else {
670        ALOGW("listener for process %d death is gone", mWhich);
671    }
672}
673
674sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
675        player_type playerType)
676{
677    ALOGV("player type = %d", playerType);
678
679    // create the right type of player
680    sp<MediaPlayerBase> p = createPlayer(playerType);
681    if (p == NULL) {
682        return p;
683    }
684
685    sp<IServiceManager> sm = defaultServiceManager();
686    sp<IBinder> binder = sm->getService(String16("media.extractor"));
687    if (binder == NULL) {
688        ALOGE("extractor service not available");
689        return NULL;
690    }
691    mExtractorDeathListener = new ServiceDeathNotifier(binder, p, MEDIAEXTRACTOR_PROCESS_DEATH);
692    binder->linkToDeath(mExtractorDeathListener);
693
694    binder = sm->getService(String16("media.codec"));
695    if (binder == NULL) {
696        ALOGE("codec service not available");
697        return NULL;
698    }
699    mCodecDeathListener = new ServiceDeathNotifier(binder, p, MEDIACODEC_PROCESS_DEATH);
700    binder->linkToDeath(mCodecDeathListener);
701
702    if (!p->hardwareOutput()) {
703        Mutex::Autolock l(mLock);
704        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
705                mPid, mAudioAttributes);
706        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
707    }
708
709    return p;
710}
711
712void MediaPlayerService::Client::setDataSource_post(
713        const sp<MediaPlayerBase>& p,
714        status_t status)
715{
716    ALOGV(" setDataSource");
717    mStatus = status;
718    if (mStatus != OK) {
719        ALOGE("  error: %d", mStatus);
720        return;
721    }
722
723    // Set the re-transmission endpoint if one was chosen.
724    if (mRetransmitEndpointValid) {
725        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
726        if (mStatus != NO_ERROR) {
727            ALOGE("setRetransmitEndpoint error: %d", mStatus);
728        }
729    }
730
731    if (mStatus == OK) {
732        mPlayer = p;
733    }
734}
735
736status_t MediaPlayerService::Client::setDataSource(
737        const sp<IMediaHTTPService> &httpService,
738        const char *url,
739        const KeyedVector<String8, String8> *headers)
740{
741    ALOGV("setDataSource(%s)", url);
742    if (url == NULL)
743        return UNKNOWN_ERROR;
744
745    if ((strncmp(url, "http://", 7) == 0) ||
746        (strncmp(url, "https://", 8) == 0) ||
747        (strncmp(url, "rtsp://", 7) == 0)) {
748        if (!checkPermission("android.permission.INTERNET")) {
749            return PERMISSION_DENIED;
750        }
751    }
752
753    if (strncmp(url, "content://", 10) == 0) {
754        // get a filedescriptor for the content Uri and
755        // pass it to the setDataSource(fd) method
756
757        String16 url16(url);
758        int fd = android::openContentProviderFile(url16);
759        if (fd < 0)
760        {
761            ALOGE("Couldn't open fd for %s", url);
762            return UNKNOWN_ERROR;
763        }
764        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
765        close(fd);
766        return mStatus;
767    } else {
768        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
769        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
770        if (p == NULL) {
771            return NO_INIT;
772        }
773
774        setDataSource_post(p, p->setDataSource(httpService, url, headers));
775        return mStatus;
776    }
777}
778
779status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
780{
781    ALOGV("setDataSource fd=%d (%s), offset=%lld, length=%lld",
782            fd, nameForFd(fd).c_str(), (long long) offset, (long long) length);
783    struct stat sb;
784    int ret = fstat(fd, &sb);
785    if (ret != 0) {
786        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
787        return UNKNOWN_ERROR;
788    }
789
790    ALOGV("st_dev  = %llu", static_cast<unsigned long long>(sb.st_dev));
791    ALOGV("st_mode = %u", sb.st_mode);
792    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
793    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
794    ALOGV("st_size = %llu", static_cast<unsigned long long>(sb.st_size));
795
796    if (offset >= sb.st_size) {
797        ALOGE("offset error");
798        return UNKNOWN_ERROR;
799    }
800    if (offset + length > sb.st_size) {
801        length = sb.st_size - offset;
802        ALOGV("calculated length = %lld", (long long)length);
803    }
804
805    player_type playerType = MediaPlayerFactory::getPlayerType(this,
806                                                               fd,
807                                                               offset,
808                                                               length);
809    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
810    if (p == NULL) {
811        return NO_INIT;
812    }
813
814    // now set data source
815    setDataSource_post(p, p->setDataSource(fd, offset, length));
816    return mStatus;
817}
818
819status_t MediaPlayerService::Client::setDataSource(
820        const sp<IStreamSource> &source) {
821    // create the right type of player
822    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
823    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
824    if (p == NULL) {
825        return NO_INIT;
826    }
827
828    // now set data source
829    setDataSource_post(p, p->setDataSource(source));
830    return mStatus;
831}
832
833status_t MediaPlayerService::Client::setDataSource(
834        const sp<IDataSource> &source) {
835    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
836    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
837    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
838    if (p == NULL) {
839        return NO_INIT;
840    }
841    // now set data source
842    setDataSource_post(p, p->setDataSource(dataSource));
843    return mStatus;
844}
845
846void MediaPlayerService::Client::disconnectNativeWindow() {
847    if (mConnectedWindow != NULL) {
848        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
849                NATIVE_WINDOW_API_MEDIA);
850
851        if (err != OK) {
852            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
853                    strerror(-err), err);
854        }
855    }
856    mConnectedWindow.clear();
857}
858
859status_t MediaPlayerService::Client::setVideoSurfaceTexture(
860        const sp<IGraphicBufferProducer>& bufferProducer)
861{
862    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
863    sp<MediaPlayerBase> p = getPlayer();
864    if (p == 0) return UNKNOWN_ERROR;
865
866    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
867    if (mConnectedWindowBinder == binder) {
868        return OK;
869    }
870
871    sp<ANativeWindow> anw;
872    if (bufferProducer != NULL) {
873        anw = new Surface(bufferProducer, true /* controlledByApp */);
874        status_t err = native_window_api_connect(anw.get(),
875                NATIVE_WINDOW_API_MEDIA);
876
877        if (err != OK) {
878            ALOGE("setVideoSurfaceTexture failed: %d", err);
879            // Note that we must do the reset before disconnecting from the ANW.
880            // Otherwise queue/dequeue calls could be made on the disconnected
881            // ANW, which may result in errors.
882            reset();
883
884            disconnectNativeWindow();
885
886            return err;
887        }
888    }
889
890    // Note that we must set the player's new GraphicBufferProducer before
891    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
892    // on the disconnected ANW, which may result in errors.
893    status_t err = p->setVideoSurfaceTexture(bufferProducer);
894
895    disconnectNativeWindow();
896
897    mConnectedWindow = anw;
898
899    if (err == OK) {
900        mConnectedWindowBinder = binder;
901    } else {
902        disconnectNativeWindow();
903    }
904
905    return err;
906}
907
908status_t MediaPlayerService::Client::invoke(const Parcel& request,
909                                            Parcel *reply)
910{
911    sp<MediaPlayerBase> p = getPlayer();
912    if (p == NULL) return UNKNOWN_ERROR;
913    return p->invoke(request, reply);
914}
915
916// This call doesn't need to access the native player.
917status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
918{
919    status_t status;
920    media::Metadata::Filter allow, drop;
921
922    if (unmarshallFilter(filter, &allow, &status) &&
923        unmarshallFilter(filter, &drop, &status)) {
924        Mutex::Autolock lock(mLock);
925
926        mMetadataAllow = allow;
927        mMetadataDrop = drop;
928    }
929    return status;
930}
931
932status_t MediaPlayerService::Client::getMetadata(
933        bool update_only, bool /*apply_filter*/, Parcel *reply)
934{
935    sp<MediaPlayerBase> player = getPlayer();
936    if (player == 0) return UNKNOWN_ERROR;
937
938    status_t status;
939    // Placeholder for the return code, updated by the caller.
940    reply->writeInt32(-1);
941
942    media::Metadata::Filter ids;
943
944    // We don't block notifications while we fetch the data. We clear
945    // mMetadataUpdated first so we don't lose notifications happening
946    // during the rest of this call.
947    {
948        Mutex::Autolock lock(mLock);
949        if (update_only) {
950            ids = mMetadataUpdated;
951        }
952        mMetadataUpdated.clear();
953    }
954
955    media::Metadata metadata(reply);
956
957    metadata.appendHeader();
958    status = player->getMetadata(ids, reply);
959
960    if (status != OK) {
961        metadata.resetParcel();
962        ALOGE("getMetadata failed %d", status);
963        return status;
964    }
965
966    // FIXME: Implement filtering on the result. Not critical since
967    // filtering takes place on the update notifications already. This
968    // would be when all the metadata are fetch and a filter is set.
969
970    // Everything is fine, update the metadata length.
971    metadata.updateLength();
972    return OK;
973}
974
975status_t MediaPlayerService::Client::prepareAsync()
976{
977    ALOGV("[%d] prepareAsync", mConnId);
978    sp<MediaPlayerBase> p = getPlayer();
979    if (p == 0) return UNKNOWN_ERROR;
980    status_t ret = p->prepareAsync();
981#if CALLBACK_ANTAGONIZER
982    ALOGD("start Antagonizer");
983    if (ret == NO_ERROR) mAntagonizer->start();
984#endif
985    return ret;
986}
987
988status_t MediaPlayerService::Client::start()
989{
990    ALOGV("[%d] start", mConnId);
991    sp<MediaPlayerBase> p = getPlayer();
992    if (p == 0) return UNKNOWN_ERROR;
993    p->setLooping(mLoop);
994    return p->start();
995}
996
997status_t MediaPlayerService::Client::stop()
998{
999    ALOGV("[%d] stop", mConnId);
1000    sp<MediaPlayerBase> p = getPlayer();
1001    if (p == 0) return UNKNOWN_ERROR;
1002    return p->stop();
1003}
1004
1005status_t MediaPlayerService::Client::pause()
1006{
1007    ALOGV("[%d] pause", mConnId);
1008    sp<MediaPlayerBase> p = getPlayer();
1009    if (p == 0) return UNKNOWN_ERROR;
1010    return p->pause();
1011}
1012
1013status_t MediaPlayerService::Client::isPlaying(bool* state)
1014{
1015    *state = false;
1016    sp<MediaPlayerBase> p = getPlayer();
1017    if (p == 0) return UNKNOWN_ERROR;
1018    *state = p->isPlaying();
1019    ALOGV("[%d] isPlaying: %d", mConnId, *state);
1020    return NO_ERROR;
1021}
1022
1023status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
1024{
1025    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
1026            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
1027    sp<MediaPlayerBase> p = getPlayer();
1028    if (p == 0) return UNKNOWN_ERROR;
1029    return p->setPlaybackSettings(rate);
1030}
1031
1032status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
1033{
1034    sp<MediaPlayerBase> p = getPlayer();
1035    if (p == 0) return UNKNOWN_ERROR;
1036    status_t ret = p->getPlaybackSettings(rate);
1037    if (ret == NO_ERROR) {
1038        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
1039                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
1040    } else {
1041        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
1042    }
1043    return ret;
1044}
1045
1046status_t MediaPlayerService::Client::setSyncSettings(
1047        const AVSyncSettings& sync, float videoFpsHint)
1048{
1049    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1050            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1051    sp<MediaPlayerBase> p = getPlayer();
1052    if (p == 0) return UNKNOWN_ERROR;
1053    return p->setSyncSettings(sync, videoFpsHint);
1054}
1055
1056status_t MediaPlayerService::Client::getSyncSettings(
1057        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1058{
1059    sp<MediaPlayerBase> p = getPlayer();
1060    if (p == 0) return UNKNOWN_ERROR;
1061    status_t ret = p->getSyncSettings(sync, videoFps);
1062    if (ret == NO_ERROR) {
1063        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1064                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1065    } else {
1066        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1067    }
1068    return ret;
1069}
1070
1071status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1072{
1073    ALOGV("getCurrentPosition");
1074    sp<MediaPlayerBase> p = getPlayer();
1075    if (p == 0) return UNKNOWN_ERROR;
1076    status_t ret = p->getCurrentPosition(msec);
1077    if (ret == NO_ERROR) {
1078        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1079    } else {
1080        ALOGE("getCurrentPosition returned %d", ret);
1081    }
1082    return ret;
1083}
1084
1085status_t MediaPlayerService::Client::getDuration(int *msec)
1086{
1087    ALOGV("getDuration");
1088    sp<MediaPlayerBase> p = getPlayer();
1089    if (p == 0) return UNKNOWN_ERROR;
1090    status_t ret = p->getDuration(msec);
1091    if (ret == NO_ERROR) {
1092        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1093    } else {
1094        ALOGE("getDuration returned %d", ret);
1095    }
1096    return ret;
1097}
1098
1099status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1100    ALOGV("setNextPlayer");
1101    Mutex::Autolock l(mLock);
1102    sp<Client> c = static_cast<Client*>(player.get());
1103    if (c != NULL && !mService->hasClient(c)) {
1104      return BAD_VALUE;
1105    }
1106
1107    mNextClient = c;
1108
1109    if (c != NULL) {
1110        if (mAudioOutput != NULL) {
1111            mAudioOutput->setNextOutput(c->mAudioOutput);
1112        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1113            ALOGE("no current audio output");
1114        }
1115
1116        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1117            mPlayer->setNextPlayer(mNextClient->getPlayer());
1118        }
1119    }
1120
1121    return OK;
1122}
1123
1124status_t MediaPlayerService::Client::seekTo(int msec, MediaPlayerSeekMode mode)
1125{
1126    ALOGV("[%d] seekTo(%d, %d)", mConnId, msec, mode);
1127    sp<MediaPlayerBase> p = getPlayer();
1128    if (p == 0) return UNKNOWN_ERROR;
1129    return p->seekTo(msec, mode);
1130}
1131
1132status_t MediaPlayerService::Client::reset()
1133{
1134    ALOGV("[%d] reset", mConnId);
1135    mRetransmitEndpointValid = false;
1136    sp<MediaPlayerBase> p = getPlayer();
1137    if (p == 0) return UNKNOWN_ERROR;
1138    return p->reset();
1139}
1140
1141status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1142{
1143    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1144    // TODO: for hardware output, call player instead
1145    Mutex::Autolock l(mLock);
1146    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1147    return NO_ERROR;
1148}
1149
1150status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1151{
1152    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1153    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1154    if (mAudioAttributes == NULL) {
1155        return NO_MEMORY;
1156    }
1157    unmarshallAudioAttributes(parcel, mAudioAttributes);
1158
1159    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1160            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1161            mAudioAttributes->tags);
1162
1163    if (mAudioOutput != 0) {
1164        mAudioOutput->setAudioAttributes(mAudioAttributes);
1165    }
1166    return NO_ERROR;
1167}
1168
1169status_t MediaPlayerService::Client::setLooping(int loop)
1170{
1171    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1172    mLoop = loop;
1173    sp<MediaPlayerBase> p = getPlayer();
1174    if (p != 0) return p->setLooping(loop);
1175    return NO_ERROR;
1176}
1177
1178status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1179{
1180    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1181
1182    // for hardware output, call player instead
1183    sp<MediaPlayerBase> p = getPlayer();
1184    {
1185      Mutex::Autolock l(mLock);
1186      if (p != 0 && p->hardwareOutput()) {
1187          MediaPlayerHWInterface* hwp =
1188                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1189          return hwp->setVolume(leftVolume, rightVolume);
1190      } else {
1191          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1192          return NO_ERROR;
1193      }
1194    }
1195
1196    return NO_ERROR;
1197}
1198
1199status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1200{
1201    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1202    Mutex::Autolock l(mLock);
1203    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1204    return NO_ERROR;
1205}
1206
1207status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1208{
1209    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1210    Mutex::Autolock l(mLock);
1211    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1212    return NO_ERROR;
1213}
1214
1215status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1216    ALOGV("[%d] setParameter(%d)", mConnId, key);
1217    switch (key) {
1218    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1219    {
1220        Mutex::Autolock l(mLock);
1221        return setAudioAttributes_l(request);
1222    }
1223    default:
1224        sp<MediaPlayerBase> p = getPlayer();
1225        if (p == 0) { return UNKNOWN_ERROR; }
1226        return p->setParameter(key, request);
1227    }
1228}
1229
1230status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1231    ALOGV("[%d] getParameter(%d)", mConnId, key);
1232    sp<MediaPlayerBase> p = getPlayer();
1233    if (p == 0) return UNKNOWN_ERROR;
1234    return p->getParameter(key, reply);
1235}
1236
1237status_t MediaPlayerService::Client::setRetransmitEndpoint(
1238        const struct sockaddr_in* endpoint) {
1239
1240    if (NULL != endpoint) {
1241        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1242        uint16_t p = ntohs(endpoint->sin_port);
1243        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1244                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1245    } else {
1246        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1247    }
1248
1249    sp<MediaPlayerBase> p = getPlayer();
1250
1251    // Right now, the only valid time to set a retransmit endpoint is before
1252    // player selection has been made (since the presence or absence of a
1253    // retransmit endpoint is going to determine which player is selected during
1254    // setDataSource).
1255    if (p != 0) return INVALID_OPERATION;
1256
1257    if (NULL != endpoint) {
1258        mRetransmitEndpoint = *endpoint;
1259        mRetransmitEndpointValid = true;
1260    } else {
1261        mRetransmitEndpointValid = false;
1262    }
1263
1264    return NO_ERROR;
1265}
1266
1267status_t MediaPlayerService::Client::getRetransmitEndpoint(
1268        struct sockaddr_in* endpoint)
1269{
1270    if (NULL == endpoint)
1271        return BAD_VALUE;
1272
1273    sp<MediaPlayerBase> p = getPlayer();
1274
1275    if (p != NULL)
1276        return p->getRetransmitEndpoint(endpoint);
1277
1278    if (!mRetransmitEndpointValid)
1279        return NO_INIT;
1280
1281    *endpoint = mRetransmitEndpoint;
1282
1283    return NO_ERROR;
1284}
1285
1286void MediaPlayerService::Client::notify(
1287        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1288{
1289    Client* client = static_cast<Client*>(cookie);
1290    if (client == NULL) {
1291        return;
1292    }
1293
1294    sp<IMediaPlayerClient> c;
1295    {
1296        Mutex::Autolock l(client->mLock);
1297        c = client->mClient;
1298        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1299            if (client->mAudioOutput != NULL)
1300                client->mAudioOutput->switchToNextOutput();
1301            client->mNextClient->start();
1302            if (client->mNextClient->mClient != NULL) {
1303                client->mNextClient->mClient->notify(
1304                        MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1305            }
1306        }
1307    }
1308
1309    if (MEDIA_INFO == msg &&
1310        MEDIA_INFO_METADATA_UPDATE == ext1) {
1311        const media::Metadata::Type metadata_type = ext2;
1312
1313        if(client->shouldDropMetadata(metadata_type)) {
1314            return;
1315        }
1316
1317        // Update the list of metadata that have changed. getMetadata
1318        // also access mMetadataUpdated and clears it.
1319        client->addNewMetadataUpdate(metadata_type);
1320    }
1321
1322    if (c != NULL) {
1323        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1324        c->notify(msg, ext1, ext2, obj);
1325    }
1326}
1327
1328
1329bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1330{
1331    Mutex::Autolock lock(mLock);
1332
1333    if (findMetadata(mMetadataDrop, code)) {
1334        return true;
1335    }
1336
1337    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1338        return false;
1339    } else {
1340        return true;
1341    }
1342}
1343
1344
1345void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1346    Mutex::Autolock lock(mLock);
1347    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1348        mMetadataUpdated.add(metadata_type);
1349    }
1350}
1351
1352#if CALLBACK_ANTAGONIZER
1353const int Antagonizer::interval = 10000; // 10 msecs
1354
1355Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1356    mExit(false), mActive(false), mClient(client), mCb(cb)
1357{
1358    createThread(callbackThread, this);
1359}
1360
1361void Antagonizer::kill()
1362{
1363    Mutex::Autolock _l(mLock);
1364    mActive = false;
1365    mExit = true;
1366    mCondition.wait(mLock);
1367}
1368
1369int Antagonizer::callbackThread(void* user)
1370{
1371    ALOGD("Antagonizer started");
1372    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1373    while (!p->mExit) {
1374        if (p->mActive) {
1375            ALOGV("send event");
1376            p->mCb(p->mClient, 0, 0, 0);
1377        }
1378        usleep(interval);
1379    }
1380    Mutex::Autolock _l(p->mLock);
1381    p->mCondition.signal();
1382    ALOGD("Antagonizer stopped");
1383    return 0;
1384}
1385#endif
1386
1387#undef LOG_TAG
1388#define LOG_TAG "AudioSink"
1389MediaPlayerService::AudioOutput::AudioOutput(audio_session_t sessionId, int uid, int pid,
1390        const audio_attributes_t* attr)
1391    : mCallback(NULL),
1392      mCallbackCookie(NULL),
1393      mCallbackData(NULL),
1394      mStreamType(AUDIO_STREAM_MUSIC),
1395      mLeftVolume(1.0),
1396      mRightVolume(1.0),
1397      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1398      mSampleRateHz(0),
1399      mMsecsPerFrame(0),
1400      mFrameSize(0),
1401      mSessionId(sessionId),
1402      mUid(uid),
1403      mPid(pid),
1404      mSendLevel(0.0),
1405      mAuxEffectId(0),
1406      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1407{
1408    ALOGV("AudioOutput(%d)", sessionId);
1409    if (attr != NULL) {
1410        mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1411        if (mAttributes != NULL) {
1412            memcpy(mAttributes, attr, sizeof(audio_attributes_t));
1413            mStreamType = audio_attributes_to_stream_type(attr);
1414        }
1415    } else {
1416        mAttributes = NULL;
1417    }
1418
1419    setMinBufferCount();
1420}
1421
1422MediaPlayerService::AudioOutput::~AudioOutput()
1423{
1424    close();
1425    free(mAttributes);
1426    delete mCallbackData;
1427}
1428
1429//static
1430void MediaPlayerService::AudioOutput::setMinBufferCount()
1431{
1432    char value[PROPERTY_VALUE_MAX];
1433    if (property_get("ro.kernel.qemu", value, 0)) {
1434        mIsOnEmulator = true;
1435        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1436    }
1437}
1438
1439// static
1440bool MediaPlayerService::AudioOutput::isOnEmulator()
1441{
1442    setMinBufferCount(); // benign race wrt other threads
1443    return mIsOnEmulator;
1444}
1445
1446// static
1447int MediaPlayerService::AudioOutput::getMinBufferCount()
1448{
1449    setMinBufferCount(); // benign race wrt other threads
1450    return mMinBufferCount;
1451}
1452
1453ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1454{
1455    Mutex::Autolock lock(mLock);
1456    if (mTrack == 0) return NO_INIT;
1457    return mTrack->frameCount() * mFrameSize;
1458}
1459
1460ssize_t MediaPlayerService::AudioOutput::frameCount() const
1461{
1462    Mutex::Autolock lock(mLock);
1463    if (mTrack == 0) return NO_INIT;
1464    return mTrack->frameCount();
1465}
1466
1467ssize_t MediaPlayerService::AudioOutput::channelCount() const
1468{
1469    Mutex::Autolock lock(mLock);
1470    if (mTrack == 0) return NO_INIT;
1471    return mTrack->channelCount();
1472}
1473
1474ssize_t MediaPlayerService::AudioOutput::frameSize() const
1475{
1476    Mutex::Autolock lock(mLock);
1477    if (mTrack == 0) return NO_INIT;
1478    return mFrameSize;
1479}
1480
1481uint32_t MediaPlayerService::AudioOutput::latency () const
1482{
1483    Mutex::Autolock lock(mLock);
1484    if (mTrack == 0) return 0;
1485    return mTrack->latency();
1486}
1487
1488float MediaPlayerService::AudioOutput::msecsPerFrame() const
1489{
1490    Mutex::Autolock lock(mLock);
1491    return mMsecsPerFrame;
1492}
1493
1494status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1495{
1496    Mutex::Autolock lock(mLock);
1497    if (mTrack == 0) return NO_INIT;
1498    return mTrack->getPosition(position);
1499}
1500
1501status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1502{
1503    Mutex::Autolock lock(mLock);
1504    if (mTrack == 0) return NO_INIT;
1505    return mTrack->getTimestamp(ts);
1506}
1507
1508// TODO: Remove unnecessary calls to getPlayedOutDurationUs()
1509// as it acquires locks and may query the audio driver.
1510//
1511// Some calls could conceivably retrieve extrapolated data instead of
1512// accessing getTimestamp() or getPosition() every time a data buffer with
1513// a media time is received.
1514//
1515// Calculate duration of played samples if played at normal rate (i.e., 1.0).
1516int64_t MediaPlayerService::AudioOutput::getPlayedOutDurationUs(int64_t nowUs) const
1517{
1518    Mutex::Autolock lock(mLock);
1519    if (mTrack == 0 || mSampleRateHz == 0) {
1520        return 0;
1521    }
1522
1523    uint32_t numFramesPlayed;
1524    int64_t numFramesPlayedAtUs;
1525    AudioTimestamp ts;
1526
1527    status_t res = mTrack->getTimestamp(ts);
1528    if (res == OK) {                 // case 1: mixing audio tracks and offloaded tracks.
1529        numFramesPlayed = ts.mPosition;
1530        numFramesPlayedAtUs = ts.mTime.tv_sec * 1000000LL + ts.mTime.tv_nsec / 1000;
1531        //ALOGD("getTimestamp: OK %d %lld", numFramesPlayed, (long long)numFramesPlayedAtUs);
1532    } else if (res == WOULD_BLOCK) { // case 2: transitory state on start of a new track
1533        numFramesPlayed = 0;
1534        numFramesPlayedAtUs = nowUs;
1535        //ALOGD("getTimestamp: WOULD_BLOCK %d %lld",
1536        //        numFramesPlayed, (long long)numFramesPlayedAtUs);
1537    } else {                         // case 3: transitory at new track or audio fast tracks.
1538        res = mTrack->getPosition(&numFramesPlayed);
1539        CHECK_EQ(res, (status_t)OK);
1540        numFramesPlayedAtUs = nowUs;
1541        numFramesPlayedAtUs += 1000LL * mTrack->latency() / 2; /* XXX */
1542        //ALOGD("getPosition: %u %lld", numFramesPlayed, (long long)numFramesPlayedAtUs);
1543    }
1544
1545    // CHECK_EQ(numFramesPlayed & (1 << 31), 0);  // can't be negative until 12.4 hrs, test
1546    // TODO: remove the (int32_t) casting below as it may overflow at 12.4 hours.
1547    int64_t durationUs = (int64_t)((int32_t)numFramesPlayed * 1000000LL / mSampleRateHz)
1548            + nowUs - numFramesPlayedAtUs;
1549    if (durationUs < 0) {
1550        // Occurs when numFramesPlayed position is very small and the following:
1551        // (1) In case 1, the time nowUs is computed before getTimestamp() is called and
1552        //     numFramesPlayedAtUs is greater than nowUs by time more than numFramesPlayed.
1553        // (2) In case 3, using getPosition and adding mAudioSink->latency() to
1554        //     numFramesPlayedAtUs, by a time amount greater than numFramesPlayed.
1555        //
1556        // Both of these are transitory conditions.
1557        ALOGV("getPlayedOutDurationUs: negative duration %lld set to zero", (long long)durationUs);
1558        durationUs = 0;
1559    }
1560    ALOGV("getPlayedOutDurationUs(%lld) nowUs(%lld) frames(%u) framesAt(%lld)",
1561            (long long)durationUs, (long long)nowUs,
1562            numFramesPlayed, (long long)numFramesPlayedAtUs);
1563    return durationUs;
1564}
1565
1566status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1567{
1568    Mutex::Autolock lock(mLock);
1569    if (mTrack == 0) return NO_INIT;
1570    ExtendedTimestamp ets;
1571    status_t status = mTrack->getTimestamp(&ets);
1572    if (status == OK || status == WOULD_BLOCK) {
1573        *frameswritten = (uint32_t)ets.mPosition[ExtendedTimestamp::LOCATION_CLIENT];
1574    }
1575    return status;
1576}
1577
1578status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1579{
1580    Mutex::Autolock lock(mLock);
1581    if (mTrack == 0) return NO_INIT;
1582    return mTrack->setParameters(keyValuePairs);
1583}
1584
1585String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1586{
1587    Mutex::Autolock lock(mLock);
1588    if (mTrack == 0) return String8::empty();
1589    return mTrack->getParameters(keys);
1590}
1591
1592void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1593    Mutex::Autolock lock(mLock);
1594    if (attributes == NULL) {
1595        free(mAttributes);
1596        mAttributes = NULL;
1597    } else {
1598        if (mAttributes == NULL) {
1599            mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1600        }
1601        memcpy(mAttributes, attributes, sizeof(audio_attributes_t));
1602        mStreamType = audio_attributes_to_stream_type(attributes);
1603    }
1604}
1605
1606void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1607{
1608    Mutex::Autolock lock(mLock);
1609    // do not allow direct stream type modification if attributes have been set
1610    if (mAttributes == NULL) {
1611        mStreamType = streamType;
1612    }
1613}
1614
1615void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1616{
1617    ALOGV("deleteRecycledTrack_l");
1618    if (mRecycledTrack != 0) {
1619
1620        if (mCallbackData != NULL) {
1621            mCallbackData->setOutput(NULL);
1622            mCallbackData->endTrackSwitch();
1623        }
1624
1625        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1626            int32_t msec = 0;
1627            if (!mRecycledTrack->stopped()) { // check if active
1628                 (void)mRecycledTrack->pendingDuration(&msec);
1629            }
1630            mRecycledTrack->stop(); // ensure full data drain
1631            ALOGD("deleting recycled track, waiting for data drain (%d msec)", msec);
1632            if (msec > 0) {
1633                static const int32_t WAIT_LIMIT_MS = 3000;
1634                if (msec > WAIT_LIMIT_MS) {
1635                    msec = WAIT_LIMIT_MS;
1636                }
1637                usleep(msec * 1000LL);
1638            }
1639        }
1640        // An offloaded track isn't flushed because the STREAM_END is reported
1641        // slightly prematurely to allow time for the gapless track switch
1642        // but this means that if we decide not to recycle the track there
1643        // could be a small amount of residual data still playing. We leave
1644        // AudioFlinger to drain the track.
1645
1646        mRecycledTrack.clear();
1647        close_l();
1648        delete mCallbackData;
1649        mCallbackData = NULL;
1650    }
1651}
1652
1653void MediaPlayerService::AudioOutput::close_l()
1654{
1655    mTrack.clear();
1656}
1657
1658status_t MediaPlayerService::AudioOutput::open(
1659        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1660        audio_format_t format, int bufferCount,
1661        AudioCallback cb, void *cookie,
1662        audio_output_flags_t flags,
1663        const audio_offload_info_t *offloadInfo,
1664        bool doNotReconnect,
1665        uint32_t suggestedFrameCount)
1666{
1667    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1668                format, bufferCount, mSessionId, flags);
1669
1670    // offloading is only supported in callback mode for now.
1671    // offloadInfo must be present if offload flag is set
1672    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1673            ((cb == NULL) || (offloadInfo == NULL))) {
1674        return BAD_VALUE;
1675    }
1676
1677    // compute frame count for the AudioTrack internal buffer
1678    size_t frameCount;
1679    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1680        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1681    } else {
1682        // try to estimate the buffer processing fetch size from AudioFlinger.
1683        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1684        uint32_t afSampleRate;
1685        size_t afFrameCount;
1686        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1687            return NO_INIT;
1688        }
1689        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1690            return NO_INIT;
1691        }
1692        const size_t framesPerBuffer =
1693                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1694
1695        if (bufferCount == 0) {
1696            // use suggestedFrameCount
1697            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1698        }
1699        // Check argument bufferCount against the mininum buffer count
1700        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1701            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1702            bufferCount = mMinBufferCount;
1703        }
1704        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1705        // which will be the minimum size permitted.
1706        frameCount = bufferCount * framesPerBuffer;
1707    }
1708
1709    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1710        channelMask = audio_channel_out_mask_from_count(channelCount);
1711        if (0 == channelMask) {
1712            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1713            return NO_INIT;
1714        }
1715    }
1716
1717    Mutex::Autolock lock(mLock);
1718    mCallback = cb;
1719    mCallbackCookie = cookie;
1720
1721    // Check whether we can recycle the track
1722    bool reuse = false;
1723    bool bothOffloaded = false;
1724
1725    if (mRecycledTrack != 0) {
1726        // check whether we are switching between two offloaded tracks
1727        bothOffloaded = (flags & mRecycledTrack->getFlags()
1728                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1729
1730        // check if the existing track can be reused as-is, or if a new track needs to be created.
1731        reuse = true;
1732
1733        if ((mCallbackData == NULL && mCallback != NULL) ||
1734                (mCallbackData != NULL && mCallback == NULL)) {
1735            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1736            ALOGV("can't chain callback and write");
1737            reuse = false;
1738        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1739                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1740            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1741                  mRecycledTrack->getSampleRate(), sampleRate,
1742                  mRecycledTrack->channelCount(), channelCount);
1743            reuse = false;
1744        } else if (flags != mFlags) {
1745            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1746            reuse = false;
1747        } else if (mRecycledTrack->format() != format) {
1748            reuse = false;
1749        }
1750    } else {
1751        ALOGV("no track available to recycle");
1752    }
1753
1754    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1755
1756    // If we can't recycle and both tracks are offloaded
1757    // we must close the previous output before opening a new one
1758    if (bothOffloaded && !reuse) {
1759        ALOGV("both offloaded and not recycling");
1760        deleteRecycledTrack_l();
1761    }
1762
1763    sp<AudioTrack> t;
1764    CallbackData *newcbd = NULL;
1765
1766    // We don't attempt to create a new track if we are recycling an
1767    // offloaded track. But, if we are recycling a non-offloaded or we
1768    // are switching where one is offloaded and one isn't then we create
1769    // the new track in advance so that we can read additional stream info
1770
1771    if (!(reuse && bothOffloaded)) {
1772        ALOGV("creating new AudioTrack");
1773
1774        if (mCallback != NULL) {
1775            newcbd = new CallbackData(this);
1776            t = new AudioTrack(
1777                    mStreamType,
1778                    sampleRate,
1779                    format,
1780                    channelMask,
1781                    frameCount,
1782                    flags,
1783                    CallbackWrapper,
1784                    newcbd,
1785                    0,  // notification frames
1786                    mSessionId,
1787                    AudioTrack::TRANSFER_CALLBACK,
1788                    offloadInfo,
1789                    mUid,
1790                    mPid,
1791                    mAttributes,
1792                    doNotReconnect);
1793        } else {
1794            // TODO: Due to buffer memory concerns, we use a max target playback speed
1795            // based on mPlaybackRate at the time of open (instead of kMaxRequiredSpeed),
1796            // also clamping the target speed to 1.0 <= targetSpeed <= kMaxRequiredSpeed.
1797            const float targetSpeed =
1798                    std::min(std::max(mPlaybackRate.mSpeed, 1.0f), kMaxRequiredSpeed);
1799            ALOGW_IF(targetSpeed != mPlaybackRate.mSpeed,
1800                    "track target speed:%f clamped from playback speed:%f",
1801                    targetSpeed, mPlaybackRate.mSpeed);
1802            t = new AudioTrack(
1803                    mStreamType,
1804                    sampleRate,
1805                    format,
1806                    channelMask,
1807                    frameCount,
1808                    flags,
1809                    NULL, // callback
1810                    NULL, // user data
1811                    0, // notification frames
1812                    mSessionId,
1813                    AudioTrack::TRANSFER_DEFAULT,
1814                    NULL, // offload info
1815                    mUid,
1816                    mPid,
1817                    mAttributes,
1818                    doNotReconnect,
1819                    targetSpeed);
1820        }
1821
1822        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1823            ALOGE("Unable to create audio track");
1824            delete newcbd;
1825            // t goes out of scope, so reference count drops to zero
1826            return NO_INIT;
1827        } else {
1828            // successful AudioTrack initialization implies a legacy stream type was generated
1829            // from the audio attributes
1830            mStreamType = t->streamType();
1831        }
1832    }
1833
1834    if (reuse) {
1835        CHECK(mRecycledTrack != NULL);
1836
1837        if (!bothOffloaded) {
1838            if (mRecycledTrack->frameCount() != t->frameCount()) {
1839                ALOGV("framecount differs: %zu/%zu frames",
1840                      mRecycledTrack->frameCount(), t->frameCount());
1841                reuse = false;
1842            }
1843        }
1844
1845        if (reuse) {
1846            ALOGV("chaining to next output and recycling track");
1847            close_l();
1848            mTrack = mRecycledTrack;
1849            mRecycledTrack.clear();
1850            if (mCallbackData != NULL) {
1851                mCallbackData->setOutput(this);
1852            }
1853            delete newcbd;
1854            return updateTrack();
1855        }
1856    }
1857
1858    // we're not going to reuse the track, unblock and flush it
1859    // this was done earlier if both tracks are offloaded
1860    if (!bothOffloaded) {
1861        deleteRecycledTrack_l();
1862    }
1863
1864    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1865
1866    mCallbackData = newcbd;
1867    ALOGV("setVolume");
1868    t->setVolume(mLeftVolume, mRightVolume);
1869
1870    mSampleRateHz = sampleRate;
1871    mFlags = flags;
1872    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1873    mFrameSize = t->frameSize();
1874    mTrack = t;
1875
1876    return updateTrack();
1877}
1878
1879status_t MediaPlayerService::AudioOutput::updateTrack() {
1880    if (mTrack == NULL) {
1881        return NO_ERROR;
1882    }
1883
1884    status_t res = NO_ERROR;
1885    // Note some output devices may give us a direct track even though we don't specify it.
1886    // Example: Line application b/17459982.
1887    if ((mTrack->getFlags()
1888            & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1889        res = mTrack->setPlaybackRate(mPlaybackRate);
1890        if (res == NO_ERROR) {
1891            mTrack->setAuxEffectSendLevel(mSendLevel);
1892            res = mTrack->attachAuxEffect(mAuxEffectId);
1893        }
1894    }
1895    ALOGV("updateTrack() DONE status %d", res);
1896    return res;
1897}
1898
1899status_t MediaPlayerService::AudioOutput::start()
1900{
1901    ALOGV("start");
1902    Mutex::Autolock lock(mLock);
1903    if (mCallbackData != NULL) {
1904        mCallbackData->endTrackSwitch();
1905    }
1906    if (mTrack != 0) {
1907        mTrack->setVolume(mLeftVolume, mRightVolume);
1908        mTrack->setAuxEffectSendLevel(mSendLevel);
1909        return mTrack->start();
1910    }
1911    return NO_INIT;
1912}
1913
1914void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1915    Mutex::Autolock lock(mLock);
1916    mNextOutput = nextOutput;
1917}
1918
1919void MediaPlayerService::AudioOutput::switchToNextOutput() {
1920    ALOGV("switchToNextOutput");
1921
1922    // Try to acquire the callback lock before moving track (without incurring deadlock).
1923    const unsigned kMaxSwitchTries = 100;
1924    Mutex::Autolock lock(mLock);
1925    for (unsigned tries = 0;;) {
1926        if (mTrack == 0) {
1927            return;
1928        }
1929        if (mNextOutput != NULL && mNextOutput != this) {
1930            if (mCallbackData != NULL) {
1931                // two alternative approaches
1932#if 1
1933                CallbackData *callbackData = mCallbackData;
1934                mLock.unlock();
1935                // proper acquisition sequence
1936                callbackData->lock();
1937                mLock.lock();
1938                // Caution: it is unlikely that someone deleted our callback or changed our target
1939                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1940                    // fatal if we are starved out.
1941                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1942                            "switchToNextOutput() cannot obtain correct lock sequence");
1943                    callbackData->unlock();
1944                    continue;
1945                }
1946                callbackData->mSwitching = true; // begin track switch
1947                callbackData->setOutput(NULL);
1948#else
1949                // tryBeginTrackSwitch() returns false if the callback has the lock.
1950                if (!mCallbackData->tryBeginTrackSwitch()) {
1951                    // fatal if we are starved out.
1952                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1953                            "switchToNextOutput() cannot obtain callback lock");
1954                    mLock.unlock();
1955                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1956                    mLock.lock();
1957                    continue;
1958                }
1959#endif
1960            }
1961
1962            Mutex::Autolock nextLock(mNextOutput->mLock);
1963
1964            // If the next output track is not NULL, then it has been
1965            // opened already for playback.
1966            // This is possible even without the next player being started,
1967            // for example, the next player could be prepared and seeked.
1968            //
1969            // Presuming it isn't advisable to force the track over.
1970             if (mNextOutput->mTrack == NULL) {
1971                ALOGD("Recycling track for gapless playback");
1972                delete mNextOutput->mCallbackData;
1973                mNextOutput->mCallbackData = mCallbackData;
1974                mNextOutput->mRecycledTrack = mTrack;
1975                mNextOutput->mSampleRateHz = mSampleRateHz;
1976                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1977                mNextOutput->mFlags = mFlags;
1978                mNextOutput->mFrameSize = mFrameSize;
1979                close_l();
1980                mCallbackData = NULL;  // destruction handled by mNextOutput
1981            } else {
1982                ALOGW("Ignoring gapless playback because next player has already started");
1983                // remove track in case resource needed for future players.
1984                if (mCallbackData != NULL) {
1985                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1986                }
1987                close_l();
1988            }
1989        }
1990        break;
1991    }
1992}
1993
1994ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1995{
1996    Mutex::Autolock lock(mLock);
1997    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1998
1999    //ALOGV("write(%p, %u)", buffer, size);
2000    if (mTrack != 0) {
2001        return mTrack->write(buffer, size, blocking);
2002    }
2003    return NO_INIT;
2004}
2005
2006void MediaPlayerService::AudioOutput::stop()
2007{
2008    ALOGV("stop");
2009    Mutex::Autolock lock(mLock);
2010    if (mTrack != 0) mTrack->stop();
2011}
2012
2013void MediaPlayerService::AudioOutput::flush()
2014{
2015    ALOGV("flush");
2016    Mutex::Autolock lock(mLock);
2017    if (mTrack != 0) mTrack->flush();
2018}
2019
2020void MediaPlayerService::AudioOutput::pause()
2021{
2022    ALOGV("pause");
2023    Mutex::Autolock lock(mLock);
2024    if (mTrack != 0) mTrack->pause();
2025}
2026
2027void MediaPlayerService::AudioOutput::close()
2028{
2029    ALOGV("close");
2030    sp<AudioTrack> track;
2031    {
2032        Mutex::Autolock lock(mLock);
2033        track = mTrack;
2034        close_l(); // clears mTrack
2035    }
2036    // destruction of the track occurs outside of mutex.
2037}
2038
2039void MediaPlayerService::AudioOutput::setVolume(float left, float right)
2040{
2041    ALOGV("setVolume(%f, %f)", left, right);
2042    Mutex::Autolock lock(mLock);
2043    mLeftVolume = left;
2044    mRightVolume = right;
2045    if (mTrack != 0) {
2046        mTrack->setVolume(left, right);
2047    }
2048}
2049
2050status_t MediaPlayerService::AudioOutput::setPlaybackRate(const AudioPlaybackRate &rate)
2051{
2052    ALOGV("setPlaybackRate(%f %f %d %d)",
2053                rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
2054    Mutex::Autolock lock(mLock);
2055    if (mTrack == 0) {
2056        // remember rate so that we can set it when the track is opened
2057        mPlaybackRate = rate;
2058        return OK;
2059    }
2060    status_t res = mTrack->setPlaybackRate(rate);
2061    if (res != NO_ERROR) {
2062        return res;
2063    }
2064    // rate.mSpeed is always greater than 0 if setPlaybackRate succeeded
2065    CHECK_GT(rate.mSpeed, 0.f);
2066    mPlaybackRate = rate;
2067    if (mSampleRateHz != 0) {
2068        mMsecsPerFrame = 1E3f / (rate.mSpeed * mSampleRateHz);
2069    }
2070    return res;
2071}
2072
2073status_t MediaPlayerService::AudioOutput::getPlaybackRate(AudioPlaybackRate *rate)
2074{
2075    ALOGV("setPlaybackRate");
2076    Mutex::Autolock lock(mLock);
2077    if (mTrack == 0) {
2078        return NO_INIT;
2079    }
2080    *rate = mTrack->getPlaybackRate();
2081    return NO_ERROR;
2082}
2083
2084status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
2085{
2086    ALOGV("setAuxEffectSendLevel(%f)", level);
2087    Mutex::Autolock lock(mLock);
2088    mSendLevel = level;
2089    if (mTrack != 0) {
2090        return mTrack->setAuxEffectSendLevel(level);
2091    }
2092    return NO_ERROR;
2093}
2094
2095status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
2096{
2097    ALOGV("attachAuxEffect(%d)", effectId);
2098    Mutex::Autolock lock(mLock);
2099    mAuxEffectId = effectId;
2100    if (mTrack != 0) {
2101        return mTrack->attachAuxEffect(effectId);
2102    }
2103    return NO_ERROR;
2104}
2105
2106// static
2107void MediaPlayerService::AudioOutput::CallbackWrapper(
2108        int event, void *cookie, void *info) {
2109    //ALOGV("callbackwrapper");
2110    CallbackData *data = (CallbackData*)cookie;
2111    // lock to ensure we aren't caught in the middle of a track switch.
2112    data->lock();
2113    AudioOutput *me = data->getOutput();
2114    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
2115    if (me == NULL) {
2116        // no output set, likely because the track was scheduled to be reused
2117        // by another player, but the format turned out to be incompatible.
2118        data->unlock();
2119        if (buffer != NULL) {
2120            buffer->size = 0;
2121        }
2122        return;
2123    }
2124
2125    switch(event) {
2126    case AudioTrack::EVENT_MORE_DATA: {
2127        size_t actualSize = (*me->mCallback)(
2128                me, buffer->raw, buffer->size, me->mCallbackCookie,
2129                CB_EVENT_FILL_BUFFER);
2130
2131        // Log when no data is returned from the callback.
2132        // (1) We may have no data (especially with network streaming sources).
2133        // (2) We may have reached the EOS and the audio track is not stopped yet.
2134        // Note that AwesomePlayer/AudioPlayer will only return zero size when it reaches the EOS.
2135        // NuPlayerRenderer will return zero when it doesn't have data (it doesn't block to fill).
2136        //
2137        // This is a benign busy-wait, with the next data request generated 10 ms or more later;
2138        // nevertheless for power reasons, we don't want to see too many of these.
2139
2140        ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
2141
2142        buffer->size = actualSize;
2143        } break;
2144
2145    case AudioTrack::EVENT_STREAM_END:
2146        // currently only occurs for offloaded callbacks
2147        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
2148        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
2149                me->mCallbackCookie, CB_EVENT_STREAM_END);
2150        break;
2151
2152    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
2153        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
2154        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
2155                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
2156        break;
2157
2158    case AudioTrack::EVENT_UNDERRUN:
2159        // This occurs when there is no data available, typically
2160        // when there is a failure to supply data to the AudioTrack.  It can also
2161        // occur in non-offloaded mode when the audio device comes out of standby.
2162        //
2163        // If an AudioTrack underruns it outputs silence. Since this happens suddenly
2164        // it may sound like an audible pop or glitch.
2165        //
2166        // The underrun event is sent once per track underrun; the condition is reset
2167        // when more data is sent to the AudioTrack.
2168        ALOGD("callbackwrapper: EVENT_UNDERRUN (discarded)");
2169        break;
2170
2171    default:
2172        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
2173    }
2174
2175    data->unlock();
2176}
2177
2178audio_session_t MediaPlayerService::AudioOutput::getSessionId() const
2179{
2180    Mutex::Autolock lock(mLock);
2181    return mSessionId;
2182}
2183
2184uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
2185{
2186    Mutex::Autolock lock(mLock);
2187    if (mTrack == 0) return 0;
2188    return mTrack->getSampleRate();
2189}
2190
2191int64_t MediaPlayerService::AudioOutput::getBufferDurationInUs() const
2192{
2193    Mutex::Autolock lock(mLock);
2194    if (mTrack == 0) {
2195        return 0;
2196    }
2197    int64_t duration;
2198    if (mTrack->getBufferDurationInUs(&duration) != OK) {
2199        return 0;
2200    }
2201    return duration;
2202}
2203
2204////////////////////////////////////////////////////////////////////////////////
2205
2206struct CallbackThread : public Thread {
2207    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
2208                   MediaPlayerBase::AudioSink::AudioCallback cb,
2209                   void *cookie);
2210
2211protected:
2212    virtual ~CallbackThread();
2213
2214    virtual bool threadLoop();
2215
2216private:
2217    wp<MediaPlayerBase::AudioSink> mSink;
2218    MediaPlayerBase::AudioSink::AudioCallback mCallback;
2219    void *mCookie;
2220    void *mBuffer;
2221    size_t mBufferSize;
2222
2223    CallbackThread(const CallbackThread &);
2224    CallbackThread &operator=(const CallbackThread &);
2225};
2226
2227CallbackThread::CallbackThread(
2228        const wp<MediaPlayerBase::AudioSink> &sink,
2229        MediaPlayerBase::AudioSink::AudioCallback cb,
2230        void *cookie)
2231    : mSink(sink),
2232      mCallback(cb),
2233      mCookie(cookie),
2234      mBuffer(NULL),
2235      mBufferSize(0) {
2236}
2237
2238CallbackThread::~CallbackThread() {
2239    if (mBuffer) {
2240        free(mBuffer);
2241        mBuffer = NULL;
2242    }
2243}
2244
2245bool CallbackThread::threadLoop() {
2246    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
2247    if (sink == NULL) {
2248        return false;
2249    }
2250
2251    if (mBuffer == NULL) {
2252        mBufferSize = sink->bufferSize();
2253        mBuffer = malloc(mBufferSize);
2254    }
2255
2256    size_t actualSize =
2257        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
2258                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
2259
2260    if (actualSize > 0) {
2261        sink->write(mBuffer, actualSize);
2262        // Could return false on sink->write() error or short count.
2263        // Not necessarily appropriate but would work for AudioCache behavior.
2264    }
2265
2266    return true;
2267}
2268
2269////////////////////////////////////////////////////////////////////////////////
2270
2271void MediaPlayerService::addBatteryData(uint32_t params)
2272{
2273    Mutex::Autolock lock(mLock);
2274
2275    int32_t time = systemTime() / 1000000L;
2276
2277    // change audio output devices. This notification comes from AudioFlinger
2278    if ((params & kBatteryDataSpeakerOn)
2279            || (params & kBatteryDataOtherAudioDeviceOn)) {
2280
2281        int deviceOn[NUM_AUDIO_DEVICES];
2282        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2283            deviceOn[i] = 0;
2284        }
2285
2286        if ((params & kBatteryDataSpeakerOn)
2287                && (params & kBatteryDataOtherAudioDeviceOn)) {
2288            deviceOn[SPEAKER_AND_OTHER] = 1;
2289        } else if (params & kBatteryDataSpeakerOn) {
2290            deviceOn[SPEAKER] = 1;
2291        } else {
2292            deviceOn[OTHER_AUDIO_DEVICE] = 1;
2293        }
2294
2295        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2296            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
2297
2298                if (mBatteryAudio.refCount > 0) { // if playing audio
2299                    if (!deviceOn[i]) {
2300                        mBatteryAudio.lastTime[i] += time;
2301                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2302                        mBatteryAudio.lastTime[i] = 0;
2303                    } else {
2304                        mBatteryAudio.lastTime[i] = 0 - time;
2305                    }
2306                }
2307
2308                mBatteryAudio.deviceOn[i] = deviceOn[i];
2309            }
2310        }
2311        return;
2312    }
2313
2314    // an audio stream is started
2315    if (params & kBatteryDataAudioFlingerStart) {
2316        // record the start time only if currently no other audio
2317        // is being played
2318        if (mBatteryAudio.refCount == 0) {
2319            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2320                if (mBatteryAudio.deviceOn[i]) {
2321                    mBatteryAudio.lastTime[i] -= time;
2322                }
2323            }
2324        }
2325
2326        mBatteryAudio.refCount ++;
2327        return;
2328
2329    } else if (params & kBatteryDataAudioFlingerStop) {
2330        if (mBatteryAudio.refCount <= 0) {
2331            ALOGW("Battery track warning: refCount is <= 0");
2332            return;
2333        }
2334
2335        // record the stop time only if currently this is the only
2336        // audio being played
2337        if (mBatteryAudio.refCount == 1) {
2338            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2339                if (mBatteryAudio.deviceOn[i]) {
2340                    mBatteryAudio.lastTime[i] += time;
2341                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2342                    mBatteryAudio.lastTime[i] = 0;
2343                }
2344            }
2345        }
2346
2347        mBatteryAudio.refCount --;
2348        return;
2349    }
2350
2351    int uid = IPCThreadState::self()->getCallingUid();
2352    if (uid == AID_MEDIA) {
2353        return;
2354    }
2355    int index = mBatteryData.indexOfKey(uid);
2356
2357    if (index < 0) { // create a new entry for this UID
2358        BatteryUsageInfo info;
2359        info.audioTotalTime = 0;
2360        info.videoTotalTime = 0;
2361        info.audioLastTime = 0;
2362        info.videoLastTime = 0;
2363        info.refCount = 0;
2364
2365        if (mBatteryData.add(uid, info) == NO_MEMORY) {
2366            ALOGE("Battery track error: no memory for new app");
2367            return;
2368        }
2369    }
2370
2371    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
2372
2373    if (params & kBatteryDataCodecStarted) {
2374        if (params & kBatteryDataTrackAudio) {
2375            info.audioLastTime -= time;
2376            info.refCount ++;
2377        }
2378        if (params & kBatteryDataTrackVideo) {
2379            info.videoLastTime -= time;
2380            info.refCount ++;
2381        }
2382    } else {
2383        if (info.refCount == 0) {
2384            ALOGW("Battery track warning: refCount is already 0");
2385            return;
2386        } else if (info.refCount < 0) {
2387            ALOGE("Battery track error: refCount < 0");
2388            mBatteryData.removeItem(uid);
2389            return;
2390        }
2391
2392        if (params & kBatteryDataTrackAudio) {
2393            info.audioLastTime += time;
2394            info.refCount --;
2395        }
2396        if (params & kBatteryDataTrackVideo) {
2397            info.videoLastTime += time;
2398            info.refCount --;
2399        }
2400
2401        // no stream is being played by this UID
2402        if (info.refCount == 0) {
2403            info.audioTotalTime += info.audioLastTime;
2404            info.audioLastTime = 0;
2405            info.videoTotalTime += info.videoLastTime;
2406            info.videoLastTime = 0;
2407        }
2408    }
2409}
2410
2411status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2412    Mutex::Autolock lock(mLock);
2413
2414    // audio output devices usage
2415    int32_t time = systemTime() / 1000000L; //in ms
2416    int32_t totalTime;
2417
2418    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2419        totalTime = mBatteryAudio.totalTime[i];
2420
2421        if (mBatteryAudio.deviceOn[i]
2422            && (mBatteryAudio.lastTime[i] != 0)) {
2423                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2424                totalTime += tmpTime;
2425        }
2426
2427        reply->writeInt32(totalTime);
2428        // reset the total time
2429        mBatteryAudio.totalTime[i] = 0;
2430   }
2431
2432    // codec usage
2433    BatteryUsageInfo info;
2434    int size = mBatteryData.size();
2435
2436    reply->writeInt32(size);
2437    int i = 0;
2438
2439    while (i < size) {
2440        info = mBatteryData.valueAt(i);
2441
2442        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2443        reply->writeInt32(info.audioTotalTime);
2444        reply->writeInt32(info.videoTotalTime);
2445
2446        info.audioTotalTime = 0;
2447        info.videoTotalTime = 0;
2448
2449        // remove the UID entry where no stream is being played
2450        if (info.refCount <= 0) {
2451            mBatteryData.removeItemsAt(i);
2452            size --;
2453            i --;
2454        }
2455        i++;
2456    }
2457    return NO_ERROR;
2458}
2459} // namespace android
2460