MediaPlayerService.cpp revision e93cc03da360a1a0d2ad937c745ce8c8e8be81c2 
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        }
242    } else {
243        ALOGE("unmarshallAudioAttributes() received unflattened tags, ignoring tag values");
244        strcpy(attributes->tags, "");
245    }
246}
247} // anonymous namespace
248
249
250namespace android {
251
252extern ALooperRoster gLooperRoster;
253
254
255static bool checkPermission(const char* permissionString) {
256    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
257    bool ok = checkCallingPermission(String16(permissionString));
258    if (!ok) ALOGE("Request requires %s", permissionString);
259    return ok;
260}
261
262// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
263/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
264/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
265
266void MediaPlayerService::instantiate() {
267    defaultServiceManager()->addService(
268            String16("media.player"), new MediaPlayerService());
269}
270
271MediaPlayerService::MediaPlayerService()
272{
273    ALOGV("MediaPlayerService created");
274    mNextConnId = 1;
275
276    mBatteryAudio.refCount = 0;
277    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
278        mBatteryAudio.deviceOn[i] = 0;
279        mBatteryAudio.lastTime[i] = 0;
280        mBatteryAudio.totalTime[i] = 0;
281    }
282    // speaker is on by default
283    mBatteryAudio.deviceOn[SPEAKER] = 1;
284
285    // reset battery stats
286    // if the mediaserver has crashed, battery stats could be left
287    // in bad state, reset the state upon service start.
288    BatteryNotifier::getInstance().noteResetVideo();
289
290    MediaPlayerFactory::registerBuiltinFactories();
291}
292
293MediaPlayerService::~MediaPlayerService()
294{
295    ALOGV("MediaPlayerService destroyed");
296}
297
298sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(const String16 &opPackageName)
299{
300    pid_t pid = IPCThreadState::self()->getCallingPid();
301    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid, opPackageName);
302    wp<MediaRecorderClient> w = recorder;
303    Mutex::Autolock lock(mLock);
304    mMediaRecorderClients.add(w);
305    ALOGV("Create new media recorder client from pid %d", pid);
306    return recorder;
307}
308
309void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
310{
311    Mutex::Autolock lock(mLock);
312    mMediaRecorderClients.remove(client);
313    ALOGV("Delete media recorder client");
314}
315
316sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
317{
318    pid_t pid = IPCThreadState::self()->getCallingPid();
319    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
320    ALOGV("Create new media retriever from pid %d", pid);
321    return retriever;
322}
323
324sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
325        audio_session_t audioSessionId)
326{
327    pid_t pid = IPCThreadState::self()->getCallingPid();
328    int32_t connId = android_atomic_inc(&mNextConnId);
329
330    sp<Client> c = new Client(
331            this, pid, connId, client, audioSessionId,
332            IPCThreadState::self()->getCallingUid());
333
334    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
335         IPCThreadState::self()->getCallingUid());
336
337    wp<Client> w = c;
338    {
339        Mutex::Autolock lock(mLock);
340        mClients.add(w);
341    }
342    return c;
343}
344
345sp<IMediaCodecList> MediaPlayerService::getCodecList() const {
346    return MediaCodecList::getLocalInstance();
347}
348
349sp<IOMX> MediaPlayerService::getOMX() {
350    ALOGI("MediaPlayerService::getOMX");
351    Mutex::Autolock autoLock(mLock);
352
353    if (mOMX.get() == NULL) {
354        mOMX = new OMX;
355    }
356
357    return mOMX;
358}
359
360sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
361    return new HDCP(createEncryptionModule);
362}
363
364sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
365        const String16 &opPackageName,
366        const sp<IRemoteDisplayClient>& client, const String8& iface) {
367    if (!checkPermission("android.permission.CONTROL_WIFI_DISPLAY")) {
368        return NULL;
369    }
370
371    return new RemoteDisplay(opPackageName, client, iface.string());
372}
373
374status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
375{
376    const size_t SIZE = 256;
377    char buffer[SIZE];
378    String8 result;
379
380    result.append(" AudioOutput\n");
381    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
382            mStreamType, mLeftVolume, mRightVolume);
383    result.append(buffer);
384    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
385            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
386    result.append(buffer);
387    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
388            mAuxEffectId, mSendLevel);
389    result.append(buffer);
390
391    ::write(fd, result.string(), result.size());
392    if (mTrack != 0) {
393        mTrack->dump(fd, args);
394    }
395    return NO_ERROR;
396}
397
398status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args)
399{
400    const size_t SIZE = 256;
401    char buffer[SIZE];
402    String8 result;
403    result.append(" Client\n");
404    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
405            mPid, mConnId, mStatus, mLoop?"true": "false");
406    result.append(buffer);
407    write(fd, result.string(), result.size());
408    if (mPlayer != NULL) {
409        mPlayer->dump(fd, args);
410    }
411    if (mAudioOutput != 0) {
412        mAudioOutput->dump(fd, args);
413    }
414    write(fd, "\n", 1);
415    return NO_ERROR;
416}
417
418/**
419 * The only arguments this understands right now are -c, -von and -voff,
420 * which are parsed by ALooperRoster::dump()
421 */
422status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
423{
424    const size_t SIZE = 256;
425    char buffer[SIZE];
426    String8 result;
427    SortedVector< sp<Client> > clients; //to serialise the mutex unlock & client destruction.
428    SortedVector< sp<MediaRecorderClient> > mediaRecorderClients;
429
430    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
431        snprintf(buffer, SIZE, "Permission Denial: "
432                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
433                IPCThreadState::self()->getCallingPid(),
434                IPCThreadState::self()->getCallingUid());
435        result.append(buffer);
436    } else {
437        Mutex::Autolock lock(mLock);
438        for (int i = 0, n = mClients.size(); i < n; ++i) {
439            sp<Client> c = mClients[i].promote();
440            if (c != 0) c->dump(fd, args);
441            clients.add(c);
442        }
443        if (mMediaRecorderClients.size() == 0) {
444                result.append(" No media recorder client\n\n");
445        } else {
446            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
447                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
448                if (c != 0) {
449                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
450                    result.append(buffer);
451                    write(fd, result.string(), result.size());
452                    result = "\n";
453                    c->dump(fd, args);
454                    mediaRecorderClients.add(c);
455                }
456            }
457        }
458
459        result.append(" Files opened and/or mapped:\n");
460        snprintf(buffer, SIZE, "/proc/%d/maps", getpid());
461        FILE *f = fopen(buffer, "r");
462        if (f) {
463            while (!feof(f)) {
464                fgets(buffer, SIZE, f);
465                if (strstr(buffer, " /storage/") ||
466                    strstr(buffer, " /system/sounds/") ||
467                    strstr(buffer, " /data/") ||
468                    strstr(buffer, " /system/media/")) {
469                    result.append("  ");
470                    result.append(buffer);
471                }
472            }
473            fclose(f);
474        } else {
475            result.append("couldn't open ");
476            result.append(buffer);
477            result.append("\n");
478        }
479
480        snprintf(buffer, SIZE, "/proc/%d/fd", getpid());
481        DIR *d = opendir(buffer);
482        if (d) {
483            struct dirent *ent;
484            while((ent = readdir(d)) != NULL) {
485                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
486                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", getpid(), ent->d_name);
487                    struct stat s;
488                    if (lstat(buffer, &s) == 0) {
489                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
490                            char linkto[256];
491                            int len = readlink(buffer, linkto, sizeof(linkto));
492                            if(len > 0) {
493                                if(len > 255) {
494                                    linkto[252] = '.';
495                                    linkto[253] = '.';
496                                    linkto[254] = '.';
497                                    linkto[255] = 0;
498                                } else {
499                                    linkto[len] = 0;
500                                }
501                                if (strstr(linkto, "/storage/") == linkto ||
502                                    strstr(linkto, "/system/sounds/") == linkto ||
503                                    strstr(linkto, "/data/") == linkto ||
504                                    strstr(linkto, "/system/media/") == linkto) {
505                                    result.append("  ");
506                                    result.append(buffer);
507                                    result.append(" -> ");
508                                    result.append(linkto);
509                                    result.append("\n");
510                                }
511                            }
512                        } else {
513                            result.append("  unexpected type for ");
514                            result.append(buffer);
515                            result.append("\n");
516                        }
517                    }
518                }
519            }
520            closedir(d);
521        } else {
522            result.append("couldn't open ");
523            result.append(buffer);
524            result.append("\n");
525        }
526
527        gLooperRoster.dump(fd, args);
528
529        bool dumpMem = false;
530        bool unreachableMemory = false;
531        for (size_t i = 0; i < args.size(); i++) {
532            if (args[i] == String16("-m")) {
533                dumpMem = true;
534            } else if (args[i] == String16("--unreachable")) {
535                unreachableMemory = true;
536            }
537        }
538        if (dumpMem) {
539            dumpMemoryAddresses(fd);
540        }
541        if (unreachableMemory) {
542            result.append("\nDumping unreachable memory:\n");
543            // TODO - should limit be an argument parameter?
544            std::string s = GetUnreachableMemoryString(true /* contents */, 10000 /* limit */);
545            result.append(s.c_str(), s.size());
546        }
547    }
548    write(fd, result.string(), result.size());
549    return NO_ERROR;
550}
551
552void MediaPlayerService::removeClient(wp<Client> client)
553{
554    Mutex::Autolock lock(mLock);
555    mClients.remove(client);
556}
557
558MediaPlayerService::Client::Client(
559        const sp<MediaPlayerService>& service, pid_t pid,
560        int32_t connId, const sp<IMediaPlayerClient>& client,
561        audio_session_t audioSessionId, uid_t uid)
562{
563    ALOGV("Client(%d) constructor", connId);
564    mPid = pid;
565    mConnId = connId;
566    mService = service;
567    mClient = client;
568    mLoop = false;
569    mStatus = NO_INIT;
570    mAudioSessionId = audioSessionId;
571    mUID = uid;
572    mRetransmitEndpointValid = false;
573    mAudioAttributes = NULL;
574
575#if CALLBACK_ANTAGONIZER
576    ALOGD("create Antagonizer");
577    mAntagonizer = new Antagonizer(notify, this);
578#endif
579}
580
581MediaPlayerService::Client::~Client()
582{
583    ALOGV("Client(%d) destructor pid = %d", mConnId, mPid);
584    mAudioOutput.clear();
585    wp<Client> client(this);
586    disconnect();
587    mService->removeClient(client);
588    if (mAudioAttributes != NULL) {
589        free(mAudioAttributes);
590    }
591}
592
593void MediaPlayerService::Client::disconnect()
594{
595    ALOGV("disconnect(%d) from pid %d", mConnId, mPid);
596    // grab local reference and clear main reference to prevent future
597    // access to object
598    sp<MediaPlayerBase> p;
599    {
600        Mutex::Autolock l(mLock);
601        p = mPlayer;
602        mClient.clear();
603    }
604
605    mPlayer.clear();
606
607    // clear the notification to prevent callbacks to dead client
608    // and reset the player. We assume the player will serialize
609    // access to itself if necessary.
610    if (p != 0) {
611        p->setNotifyCallback(0, 0);
612#if CALLBACK_ANTAGONIZER
613        ALOGD("kill Antagonizer");
614        mAntagonizer->kill();
615#endif
616        p->reset();
617    }
618
619    disconnectNativeWindow();
620
621    IPCThreadState::self()->flushCommands();
622}
623
624sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
625{
626    // determine if we have the right player type
627    sp<MediaPlayerBase> p = mPlayer;
628    if ((p != NULL) && (p->playerType() != playerType)) {
629        ALOGV("delete player");
630        p.clear();
631    }
632    if (p == NULL) {
633        p = MediaPlayerFactory::createPlayer(playerType, this, notify, mPid);
634    }
635
636    if (p != NULL) {
637        p->setUID(mUID);
638    }
639
640    return p;
641}
642
643MediaPlayerService::Client::ServiceDeathNotifier::ServiceDeathNotifier(
644        const sp<IBinder>& service,
645        const sp<MediaPlayerBase>& listener,
646        int which) {
647    mService = service;
648    mListener = listener;
649    mWhich = which;
650}
651
652MediaPlayerService::Client::ServiceDeathNotifier::~ServiceDeathNotifier() {
653    mService->unlinkToDeath(this);
654}
655
656void MediaPlayerService::Client::ServiceDeathNotifier::binderDied(const wp<IBinder>& /*who*/) {
657    sp<MediaPlayerBase> listener = mListener.promote();
658    if (listener != NULL) {
659        listener->sendEvent(MEDIA_ERROR, MEDIA_ERROR_SERVER_DIED, mWhich);
660    } else {
661        ALOGW("listener for process %d death is gone", mWhich);
662    }
663}
664
665sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
666        player_type playerType)
667{
668    ALOGV("player type = %d", playerType);
669
670    // create the right type of player
671    sp<MediaPlayerBase> p = createPlayer(playerType);
672    if (p == NULL) {
673        return p;
674    }
675
676    sp<IServiceManager> sm = defaultServiceManager();
677    sp<IBinder> binder = sm->getService(String16("media.extractor"));
678    mExtractorDeathListener = new ServiceDeathNotifier(binder, p, MEDIAEXTRACTOR_PROCESS_DEATH);
679    binder->linkToDeath(mExtractorDeathListener);
680
681    binder = sm->getService(String16("media.codec"));
682    mCodecDeathListener = new ServiceDeathNotifier(binder, p, MEDIACODEC_PROCESS_DEATH);
683    binder->linkToDeath(mCodecDeathListener);
684
685    binder = sm->getService(String16("media.audio_flinger"));
686    mAudioDeathListener = new ServiceDeathNotifier(binder, p, AUDIO_PROCESS_DEATH);
687    binder->linkToDeath(mAudioDeathListener);
688
689    if (!p->hardwareOutput()) {
690        Mutex::Autolock l(mLock);
691        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
692                mPid, mAudioAttributes);
693        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
694    }
695
696    return p;
697}
698
699void MediaPlayerService::Client::setDataSource_post(
700        const sp<MediaPlayerBase>& p,
701        status_t status)
702{
703    ALOGV(" setDataSource");
704    mStatus = status;
705    if (mStatus != OK) {
706        ALOGE("  error: %d", mStatus);
707        return;
708    }
709
710    // Set the re-transmission endpoint if one was chosen.
711    if (mRetransmitEndpointValid) {
712        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
713        if (mStatus != NO_ERROR) {
714            ALOGE("setRetransmitEndpoint error: %d", mStatus);
715        }
716    }
717
718    if (mStatus == OK) {
719        mPlayer = p;
720    }
721}
722
723status_t MediaPlayerService::Client::setDataSource(
724        const sp<IMediaHTTPService> &httpService,
725        const char *url,
726        const KeyedVector<String8, String8> *headers)
727{
728    ALOGV("setDataSource(%s)", url);
729    if (url == NULL)
730        return UNKNOWN_ERROR;
731
732    if ((strncmp(url, "http://", 7) == 0) ||
733        (strncmp(url, "https://", 8) == 0) ||
734        (strncmp(url, "rtsp://", 7) == 0)) {
735        if (!checkPermission("android.permission.INTERNET")) {
736            return PERMISSION_DENIED;
737        }
738    }
739
740    if (strncmp(url, "content://", 10) == 0) {
741        // get a filedescriptor for the content Uri and
742        // pass it to the setDataSource(fd) method
743
744        String16 url16(url);
745        int fd = android::openContentProviderFile(url16);
746        if (fd < 0)
747        {
748            ALOGE("Couldn't open fd for %s", url);
749            return UNKNOWN_ERROR;
750        }
751        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
752        close(fd);
753        return mStatus;
754    } else {
755        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
756        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
757        if (p == NULL) {
758            return NO_INIT;
759        }
760
761        setDataSource_post(p, p->setDataSource(httpService, url, headers));
762        return mStatus;
763    }
764}
765
766status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
767{
768    ALOGV("setDataSource fd=%d (%s), offset=%lld, length=%lld",
769            fd, nameForFd(fd).c_str(), (long long) offset, (long long) length);
770    struct stat sb;
771    int ret = fstat(fd, &sb);
772    if (ret != 0) {
773        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
774        return UNKNOWN_ERROR;
775    }
776
777    ALOGV("st_dev  = %llu", static_cast<unsigned long long>(sb.st_dev));
778    ALOGV("st_mode = %u", sb.st_mode);
779    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
780    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
781    ALOGV("st_size = %llu", static_cast<unsigned long long>(sb.st_size));
782
783    if (offset >= sb.st_size) {
784        ALOGE("offset error");
785        return UNKNOWN_ERROR;
786    }
787    if (offset + length > sb.st_size) {
788        length = sb.st_size - offset;
789        ALOGV("calculated length = %lld", (long long)length);
790    }
791
792    player_type playerType = MediaPlayerFactory::getPlayerType(this,
793                                                               fd,
794                                                               offset,
795                                                               length);
796    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
797    if (p == NULL) {
798        return NO_INIT;
799    }
800
801    // now set data source
802    setDataSource_post(p, p->setDataSource(fd, offset, length));
803    return mStatus;
804}
805
806status_t MediaPlayerService::Client::setDataSource(
807        const sp<IStreamSource> &source) {
808    // create the right type of player
809    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
810    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
811    if (p == NULL) {
812        return NO_INIT;
813    }
814
815    // now set data source
816    setDataSource_post(p, p->setDataSource(source));
817    return mStatus;
818}
819
820status_t MediaPlayerService::Client::setDataSource(
821        const sp<IDataSource> &source) {
822    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
823    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
824    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
825    if (p == NULL) {
826        return NO_INIT;
827    }
828    // now set data source
829    setDataSource_post(p, p->setDataSource(dataSource));
830    return mStatus;
831}
832
833void MediaPlayerService::Client::disconnectNativeWindow() {
834    if (mConnectedWindow != NULL) {
835        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
836                NATIVE_WINDOW_API_MEDIA);
837
838        if (err != OK) {
839            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
840                    strerror(-err), err);
841        }
842    }
843    mConnectedWindow.clear();
844}
845
846status_t MediaPlayerService::Client::setVideoSurfaceTexture(
847        const sp<IGraphicBufferProducer>& bufferProducer)
848{
849    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
850    sp<MediaPlayerBase> p = getPlayer();
851    if (p == 0) return UNKNOWN_ERROR;
852
853    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
854    if (mConnectedWindowBinder == binder) {
855        return OK;
856    }
857
858    sp<ANativeWindow> anw;
859    if (bufferProducer != NULL) {
860        anw = new Surface(bufferProducer, true /* controlledByApp */);
861        status_t err = native_window_api_connect(anw.get(),
862                NATIVE_WINDOW_API_MEDIA);
863
864        if (err != OK) {
865            ALOGE("setVideoSurfaceTexture failed: %d", err);
866            // Note that we must do the reset before disconnecting from the ANW.
867            // Otherwise queue/dequeue calls could be made on the disconnected
868            // ANW, which may result in errors.
869            reset();
870
871            disconnectNativeWindow();
872
873            return err;
874        }
875    }
876
877    // Note that we must set the player's new GraphicBufferProducer before
878    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
879    // on the disconnected ANW, which may result in errors.
880    status_t err = p->setVideoSurfaceTexture(bufferProducer);
881
882    disconnectNativeWindow();
883
884    mConnectedWindow = anw;
885
886    if (err == OK) {
887        mConnectedWindowBinder = binder;
888    } else {
889        disconnectNativeWindow();
890    }
891
892    return err;
893}
894
895status_t MediaPlayerService::Client::invoke(const Parcel& request,
896                                            Parcel *reply)
897{
898    sp<MediaPlayerBase> p = getPlayer();
899    if (p == NULL) return UNKNOWN_ERROR;
900    return p->invoke(request, reply);
901}
902
903// This call doesn't need to access the native player.
904status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
905{
906    status_t status;
907    media::Metadata::Filter allow, drop;
908
909    if (unmarshallFilter(filter, &allow, &status) &&
910        unmarshallFilter(filter, &drop, &status)) {
911        Mutex::Autolock lock(mLock);
912
913        mMetadataAllow = allow;
914        mMetadataDrop = drop;
915    }
916    return status;
917}
918
919status_t MediaPlayerService::Client::getMetadata(
920        bool update_only, bool /*apply_filter*/, Parcel *reply)
921{
922    sp<MediaPlayerBase> player = getPlayer();
923    if (player == 0) return UNKNOWN_ERROR;
924
925    status_t status;
926    // Placeholder for the return code, updated by the caller.
927    reply->writeInt32(-1);
928
929    media::Metadata::Filter ids;
930
931    // We don't block notifications while we fetch the data. We clear
932    // mMetadataUpdated first so we don't lose notifications happening
933    // during the rest of this call.
934    {
935        Mutex::Autolock lock(mLock);
936        if (update_only) {
937            ids = mMetadataUpdated;
938        }
939        mMetadataUpdated.clear();
940    }
941
942    media::Metadata metadata(reply);
943
944    metadata.appendHeader();
945    status = player->getMetadata(ids, reply);
946
947    if (status != OK) {
948        metadata.resetParcel();
949        ALOGE("getMetadata failed %d", status);
950        return status;
951    }
952
953    // FIXME: Implement filtering on the result. Not critical since
954    // filtering takes place on the update notifications already. This
955    // would be when all the metadata are fetch and a filter is set.
956
957    // Everything is fine, update the metadata length.
958    metadata.updateLength();
959    return OK;
960}
961
962status_t MediaPlayerService::Client::prepareAsync()
963{
964    ALOGV("[%d] prepareAsync", mConnId);
965    sp<MediaPlayerBase> p = getPlayer();
966    if (p == 0) return UNKNOWN_ERROR;
967    status_t ret = p->prepareAsync();
968#if CALLBACK_ANTAGONIZER
969    ALOGD("start Antagonizer");
970    if (ret == NO_ERROR) mAntagonizer->start();
971#endif
972    return ret;
973}
974
975status_t MediaPlayerService::Client::start()
976{
977    ALOGV("[%d] start", mConnId);
978    sp<MediaPlayerBase> p = getPlayer();
979    if (p == 0) return UNKNOWN_ERROR;
980    p->setLooping(mLoop);
981    return p->start();
982}
983
984status_t MediaPlayerService::Client::stop()
985{
986    ALOGV("[%d] stop", mConnId);
987    sp<MediaPlayerBase> p = getPlayer();
988    if (p == 0) return UNKNOWN_ERROR;
989    return p->stop();
990}
991
992status_t MediaPlayerService::Client::pause()
993{
994    ALOGV("[%d] pause", mConnId);
995    sp<MediaPlayerBase> p = getPlayer();
996    if (p == 0) return UNKNOWN_ERROR;
997    return p->pause();
998}
999
1000status_t MediaPlayerService::Client::isPlaying(bool* state)
1001{
1002    *state = false;
1003    sp<MediaPlayerBase> p = getPlayer();
1004    if (p == 0) return UNKNOWN_ERROR;
1005    *state = p->isPlaying();
1006    ALOGV("[%d] isPlaying: %d", mConnId, *state);
1007    return NO_ERROR;
1008}
1009
1010status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
1011{
1012    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
1013            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
1014    sp<MediaPlayerBase> p = getPlayer();
1015    if (p == 0) return UNKNOWN_ERROR;
1016    return p->setPlaybackSettings(rate);
1017}
1018
1019status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
1020{
1021    sp<MediaPlayerBase> p = getPlayer();
1022    if (p == 0) return UNKNOWN_ERROR;
1023    status_t ret = p->getPlaybackSettings(rate);
1024    if (ret == NO_ERROR) {
1025        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
1026                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
1027    } else {
1028        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
1029    }
1030    return ret;
1031}
1032
1033status_t MediaPlayerService::Client::setSyncSettings(
1034        const AVSyncSettings& sync, float videoFpsHint)
1035{
1036    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1037            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1038    sp<MediaPlayerBase> p = getPlayer();
1039    if (p == 0) return UNKNOWN_ERROR;
1040    return p->setSyncSettings(sync, videoFpsHint);
1041}
1042
1043status_t MediaPlayerService::Client::getSyncSettings(
1044        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1045{
1046    sp<MediaPlayerBase> p = getPlayer();
1047    if (p == 0) return UNKNOWN_ERROR;
1048    status_t ret = p->getSyncSettings(sync, videoFps);
1049    if (ret == NO_ERROR) {
1050        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1051                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1052    } else {
1053        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1054    }
1055    return ret;
1056}
1057
1058status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1059{
1060    ALOGV("getCurrentPosition");
1061    sp<MediaPlayerBase> p = getPlayer();
1062    if (p == 0) return UNKNOWN_ERROR;
1063    status_t ret = p->getCurrentPosition(msec);
1064    if (ret == NO_ERROR) {
1065        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1066    } else {
1067        ALOGE("getCurrentPosition returned %d", ret);
1068    }
1069    return ret;
1070}
1071
1072status_t MediaPlayerService::Client::getDuration(int *msec)
1073{
1074    ALOGV("getDuration");
1075    sp<MediaPlayerBase> p = getPlayer();
1076    if (p == 0) return UNKNOWN_ERROR;
1077    status_t ret = p->getDuration(msec);
1078    if (ret == NO_ERROR) {
1079        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1080    } else {
1081        ALOGE("getDuration returned %d", ret);
1082    }
1083    return ret;
1084}
1085
1086status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1087    ALOGV("setNextPlayer");
1088    Mutex::Autolock l(mLock);
1089    sp<Client> c = static_cast<Client*>(player.get());
1090    mNextClient = c;
1091
1092    if (c != NULL) {
1093        if (mAudioOutput != NULL) {
1094            mAudioOutput->setNextOutput(c->mAudioOutput);
1095        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1096            ALOGE("no current audio output");
1097        }
1098
1099        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1100            mPlayer->setNextPlayer(mNextClient->getPlayer());
1101        }
1102    }
1103
1104    return OK;
1105}
1106
1107status_t MediaPlayerService::Client::seekTo(int msec)
1108{
1109    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1110    sp<MediaPlayerBase> p = getPlayer();
1111    if (p == 0) return UNKNOWN_ERROR;
1112    return p->seekTo(msec);
1113}
1114
1115status_t MediaPlayerService::Client::reset()
1116{
1117    ALOGV("[%d] reset", mConnId);
1118    mRetransmitEndpointValid = false;
1119    sp<MediaPlayerBase> p = getPlayer();
1120    if (p == 0) return UNKNOWN_ERROR;
1121    return p->reset();
1122}
1123
1124status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1125{
1126    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1127    // TODO: for hardware output, call player instead
1128    Mutex::Autolock l(mLock);
1129    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1130    return NO_ERROR;
1131}
1132
1133status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1134{
1135    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1136    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1137    if (mAudioAttributes == NULL) {
1138        return NO_MEMORY;
1139    }
1140    unmarshallAudioAttributes(parcel, mAudioAttributes);
1141
1142    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1143            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1144            mAudioAttributes->tags);
1145
1146    if (mAudioOutput != 0) {
1147        mAudioOutput->setAudioAttributes(mAudioAttributes);
1148    }
1149    return NO_ERROR;
1150}
1151
1152status_t MediaPlayerService::Client::setLooping(int loop)
1153{
1154    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1155    mLoop = loop;
1156    sp<MediaPlayerBase> p = getPlayer();
1157    if (p != 0) return p->setLooping(loop);
1158    return NO_ERROR;
1159}
1160
1161status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1162{
1163    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1164
1165    // for hardware output, call player instead
1166    sp<MediaPlayerBase> p = getPlayer();
1167    {
1168      Mutex::Autolock l(mLock);
1169      if (p != 0 && p->hardwareOutput()) {
1170          MediaPlayerHWInterface* hwp =
1171                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1172          return hwp->setVolume(leftVolume, rightVolume);
1173      } else {
1174          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1175          return NO_ERROR;
1176      }
1177    }
1178
1179    return NO_ERROR;
1180}
1181
1182status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1183{
1184    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1185    Mutex::Autolock l(mLock);
1186    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1187    return NO_ERROR;
1188}
1189
1190status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1191{
1192    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1193    Mutex::Autolock l(mLock);
1194    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1195    return NO_ERROR;
1196}
1197
1198status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1199    ALOGV("[%d] setParameter(%d)", mConnId, key);
1200    switch (key) {
1201    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1202    {
1203        Mutex::Autolock l(mLock);
1204        return setAudioAttributes_l(request);
1205    }
1206    default:
1207        sp<MediaPlayerBase> p = getPlayer();
1208        if (p == 0) { return UNKNOWN_ERROR; }
1209        return p->setParameter(key, request);
1210    }
1211}
1212
1213status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1214    ALOGV("[%d] getParameter(%d)", mConnId, key);
1215    sp<MediaPlayerBase> p = getPlayer();
1216    if (p == 0) return UNKNOWN_ERROR;
1217    return p->getParameter(key, reply);
1218}
1219
1220status_t MediaPlayerService::Client::setRetransmitEndpoint(
1221        const struct sockaddr_in* endpoint) {
1222
1223    if (NULL != endpoint) {
1224        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1225        uint16_t p = ntohs(endpoint->sin_port);
1226        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1227                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1228    } else {
1229        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1230    }
1231
1232    sp<MediaPlayerBase> p = getPlayer();
1233
1234    // Right now, the only valid time to set a retransmit endpoint is before
1235    // player selection has been made (since the presence or absence of a
1236    // retransmit endpoint is going to determine which player is selected during
1237    // setDataSource).
1238    if (p != 0) return INVALID_OPERATION;
1239
1240    if (NULL != endpoint) {
1241        mRetransmitEndpoint = *endpoint;
1242        mRetransmitEndpointValid = true;
1243    } else {
1244        mRetransmitEndpointValid = false;
1245    }
1246
1247    return NO_ERROR;
1248}
1249
1250status_t MediaPlayerService::Client::getRetransmitEndpoint(
1251        struct sockaddr_in* endpoint)
1252{
1253    if (NULL == endpoint)
1254        return BAD_VALUE;
1255
1256    sp<MediaPlayerBase> p = getPlayer();
1257
1258    if (p != NULL)
1259        return p->getRetransmitEndpoint(endpoint);
1260
1261    if (!mRetransmitEndpointValid)
1262        return NO_INIT;
1263
1264    *endpoint = mRetransmitEndpoint;
1265
1266    return NO_ERROR;
1267}
1268
1269void MediaPlayerService::Client::notify(
1270        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1271{
1272    Client* client = static_cast<Client*>(cookie);
1273    if (client == NULL) {
1274        return;
1275    }
1276
1277    sp<IMediaPlayerClient> c;
1278    {
1279        Mutex::Autolock l(client->mLock);
1280        c = client->mClient;
1281        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1282            if (client->mAudioOutput != NULL)
1283                client->mAudioOutput->switchToNextOutput();
1284            client->mNextClient->start();
1285            if (client->mNextClient->mClient != NULL) {
1286                client->mNextClient->mClient->notify(
1287                        MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1288            }
1289        }
1290    }
1291
1292    if (MEDIA_INFO == msg &&
1293        MEDIA_INFO_METADATA_UPDATE == ext1) {
1294        const media::Metadata::Type metadata_type = ext2;
1295
1296        if(client->shouldDropMetadata(metadata_type)) {
1297            return;
1298        }
1299
1300        // Update the list of metadata that have changed. getMetadata
1301        // also access mMetadataUpdated and clears it.
1302        client->addNewMetadataUpdate(metadata_type);
1303    }
1304
1305    if (c != NULL) {
1306        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1307        c->notify(msg, ext1, ext2, obj);
1308    }
1309}
1310
1311
1312bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1313{
1314    Mutex::Autolock lock(mLock);
1315
1316    if (findMetadata(mMetadataDrop, code)) {
1317        return true;
1318    }
1319
1320    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1321        return false;
1322    } else {
1323        return true;
1324    }
1325}
1326
1327
1328void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1329    Mutex::Autolock lock(mLock);
1330    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1331        mMetadataUpdated.add(metadata_type);
1332    }
1333}
1334
1335#if CALLBACK_ANTAGONIZER
1336const int Antagonizer::interval = 10000; // 10 msecs
1337
1338Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1339    mExit(false), mActive(false), mClient(client), mCb(cb)
1340{
1341    createThread(callbackThread, this);
1342}
1343
1344void Antagonizer::kill()
1345{
1346    Mutex::Autolock _l(mLock);
1347    mActive = false;
1348    mExit = true;
1349    mCondition.wait(mLock);
1350}
1351
1352int Antagonizer::callbackThread(void* user)
1353{
1354    ALOGD("Antagonizer started");
1355    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1356    while (!p->mExit) {
1357        if (p->mActive) {
1358            ALOGV("send event");
1359            p->mCb(p->mClient, 0, 0, 0);
1360        }
1361        usleep(interval);
1362    }
1363    Mutex::Autolock _l(p->mLock);
1364    p->mCondition.signal();
1365    ALOGD("Antagonizer stopped");
1366    return 0;
1367}
1368#endif
1369
1370#undef LOG_TAG
1371#define LOG_TAG "AudioSink"
1372MediaPlayerService::AudioOutput::AudioOutput(audio_session_t sessionId, int uid, int pid,
1373        const audio_attributes_t* attr)
1374    : mCallback(NULL),
1375      mCallbackCookie(NULL),
1376      mCallbackData(NULL),
1377      mStreamType(AUDIO_STREAM_MUSIC),
1378      mLeftVolume(1.0),
1379      mRightVolume(1.0),
1380      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1381      mSampleRateHz(0),
1382      mMsecsPerFrame(0),
1383      mFrameSize(0),
1384      mSessionId(sessionId),
1385      mUid(uid),
1386      mPid(pid),
1387      mSendLevel(0.0),
1388      mAuxEffectId(0),
1389      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1390{
1391    ALOGV("AudioOutput(%d)", sessionId);
1392    if (attr != NULL) {
1393        mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1394        if (mAttributes != NULL) {
1395            memcpy(mAttributes, attr, sizeof(audio_attributes_t));
1396            mStreamType = audio_attributes_to_stream_type(attr);
1397        }
1398    } else {
1399        mAttributes = NULL;
1400    }
1401
1402    setMinBufferCount();
1403}
1404
1405MediaPlayerService::AudioOutput::~AudioOutput()
1406{
1407    close();
1408    free(mAttributes);
1409    delete mCallbackData;
1410}
1411
1412//static
1413void MediaPlayerService::AudioOutput::setMinBufferCount()
1414{
1415    char value[PROPERTY_VALUE_MAX];
1416    if (property_get("ro.kernel.qemu", value, 0)) {
1417        mIsOnEmulator = true;
1418        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1419    }
1420}
1421
1422// static
1423bool MediaPlayerService::AudioOutput::isOnEmulator()
1424{
1425    setMinBufferCount(); // benign race wrt other threads
1426    return mIsOnEmulator;
1427}
1428
1429// static
1430int MediaPlayerService::AudioOutput::getMinBufferCount()
1431{
1432    setMinBufferCount(); // benign race wrt other threads
1433    return mMinBufferCount;
1434}
1435
1436ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1437{
1438    Mutex::Autolock lock(mLock);
1439    if (mTrack == 0) return NO_INIT;
1440    return mTrack->frameCount() * mFrameSize;
1441}
1442
1443ssize_t MediaPlayerService::AudioOutput::frameCount() const
1444{
1445    Mutex::Autolock lock(mLock);
1446    if (mTrack == 0) return NO_INIT;
1447    return mTrack->frameCount();
1448}
1449
1450ssize_t MediaPlayerService::AudioOutput::channelCount() const
1451{
1452    Mutex::Autolock lock(mLock);
1453    if (mTrack == 0) return NO_INIT;
1454    return mTrack->channelCount();
1455}
1456
1457ssize_t MediaPlayerService::AudioOutput::frameSize() const
1458{
1459    Mutex::Autolock lock(mLock);
1460    if (mTrack == 0) return NO_INIT;
1461    return mFrameSize;
1462}
1463
1464uint32_t MediaPlayerService::AudioOutput::latency () const
1465{
1466    Mutex::Autolock lock(mLock);
1467    if (mTrack == 0) return 0;
1468    return mTrack->latency();
1469}
1470
1471float MediaPlayerService::AudioOutput::msecsPerFrame() const
1472{
1473    Mutex::Autolock lock(mLock);
1474    return mMsecsPerFrame;
1475}
1476
1477status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1478{
1479    Mutex::Autolock lock(mLock);
1480    if (mTrack == 0) return NO_INIT;
1481    return mTrack->getPosition(position);
1482}
1483
1484status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1485{
1486    Mutex::Autolock lock(mLock);
1487    if (mTrack == 0) return NO_INIT;
1488    return mTrack->getTimestamp(ts);
1489}
1490
1491// TODO: Remove unnecessary calls to getPlayedOutDurationUs()
1492// as it acquires locks and may query the audio driver.
1493//
1494// Some calls could conceivably retrieve extrapolated data instead of
1495// accessing getTimestamp() or getPosition() every time a data buffer with
1496// a media time is received.
1497//
1498// Calculate duration of played samples if played at normal rate (i.e., 1.0).
1499int64_t MediaPlayerService::AudioOutput::getPlayedOutDurationUs(int64_t nowUs) const
1500{
1501    Mutex::Autolock lock(mLock);
1502    if (mTrack == 0 || mSampleRateHz == 0) {
1503        return 0;
1504    }
1505
1506    uint32_t numFramesPlayed;
1507    int64_t numFramesPlayedAt;
1508    AudioTimestamp ts;
1509    static const int64_t kStaleTimestamp100ms = 100000;
1510
1511    status_t res = mTrack->getTimestamp(ts);
1512    if (res == OK) {                 // case 1: mixing audio tracks and offloaded tracks.
1513        numFramesPlayed = ts.mPosition;
1514        numFramesPlayedAt = ts.mTime.tv_sec * 1000000LL + ts.mTime.tv_nsec / 1000;
1515        const int64_t timestampAge = nowUs - numFramesPlayedAt;
1516        if (timestampAge > kStaleTimestamp100ms) {
1517            // This is an audio FIXME.
1518            // getTimestamp returns a timestamp which may come from audio mixing threads.
1519            // After pausing, the MixerThread may go idle, thus the mTime estimate may
1520            // become stale. Assuming that the MixerThread runs 20ms, with FastMixer at 5ms,
1521            // the max latency should be about 25ms with an average around 12ms (to be verified).
1522            // For safety we use 100ms.
1523            ALOGV("getTimestamp: returned stale timestamp nowUs(%lld) numFramesPlayedAt(%lld)",
1524                    (long long)nowUs, (long long)numFramesPlayedAt);
1525            numFramesPlayedAt = nowUs - kStaleTimestamp100ms;
1526        }
1527        //ALOGD("getTimestamp: OK %d %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1528    } else if (res == WOULD_BLOCK) { // case 2: transitory state on start of a new track
1529        numFramesPlayed = 0;
1530        numFramesPlayedAt = nowUs;
1531        //ALOGD("getTimestamp: WOULD_BLOCK %d %lld",
1532        //        numFramesPlayed, (long long)numFramesPlayedAt);
1533    } else {                         // case 3: transitory at new track or audio fast tracks.
1534        res = mTrack->getPosition(&numFramesPlayed);
1535        CHECK_EQ(res, (status_t)OK);
1536        numFramesPlayedAt = nowUs;
1537        numFramesPlayedAt += 1000LL * mTrack->latency() / 2; /* XXX */
1538        //ALOGD("getPosition: %u %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1539    }
1540
1541    // CHECK_EQ(numFramesPlayed & (1 << 31), 0);  // can't be negative until 12.4 hrs, test
1542    // TODO: remove the (int32_t) casting below as it may overflow at 12.4 hours.
1543    int64_t durationUs = (int64_t)((int32_t)numFramesPlayed * 1000000LL / mSampleRateHz)
1544            + nowUs - numFramesPlayedAt;
1545    if (durationUs < 0) {
1546        // Occurs when numFramesPlayed position is very small and the following:
1547        // (1) In case 1, the time nowUs is computed before getTimestamp() is called and
1548        //     numFramesPlayedAt is greater than nowUs by time more than numFramesPlayed.
1549        // (2) In case 3, using getPosition and adding mAudioSink->latency() to
1550        //     numFramesPlayedAt, by a time amount greater than numFramesPlayed.
1551        //
1552        // Both of these are transitory conditions.
1553        ALOGV("getPlayedOutDurationUs: negative duration %lld set to zero", (long long)durationUs);
1554        durationUs = 0;
1555    }
1556    ALOGV("getPlayedOutDurationUs(%lld) nowUs(%lld) frames(%u) framesAt(%lld)",
1557            (long long)durationUs, (long long)nowUs, numFramesPlayed, (long long)numFramesPlayedAt);
1558    return durationUs;
1559}
1560
1561status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1562{
1563    Mutex::Autolock lock(mLock);
1564    if (mTrack == 0) return NO_INIT;
1565    ExtendedTimestamp ets;
1566    status_t status = mTrack->getTimestamp(&ets);
1567    if (status == OK || status == WOULD_BLOCK) {
1568        *frameswritten = (uint32_t)ets.mPosition[ExtendedTimestamp::LOCATION_CLIENT];
1569    }
1570    return status;
1571}
1572
1573status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1574{
1575    Mutex::Autolock lock(mLock);
1576    if (mTrack == 0) return NO_INIT;
1577    return mTrack->setParameters(keyValuePairs);
1578}
1579
1580String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1581{
1582    Mutex::Autolock lock(mLock);
1583    if (mTrack == 0) return String8::empty();
1584    return mTrack->getParameters(keys);
1585}
1586
1587void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1588    Mutex::Autolock lock(mLock);
1589    if (attributes == NULL) {
1590        free(mAttributes);
1591        mAttributes = NULL;
1592    } else {
1593        if (mAttributes == NULL) {
1594            mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1595        }
1596        memcpy(mAttributes, attributes, sizeof(audio_attributes_t));
1597        mStreamType = audio_attributes_to_stream_type(attributes);
1598    }
1599}
1600
1601void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1602{
1603    Mutex::Autolock lock(mLock);
1604    // do not allow direct stream type modification if attributes have been set
1605    if (mAttributes == NULL) {
1606        mStreamType = streamType;
1607    }
1608}
1609
1610void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1611{
1612    ALOGV("deleteRecycledTrack_l");
1613    if (mRecycledTrack != 0) {
1614
1615        if (mCallbackData != NULL) {
1616            mCallbackData->setOutput(NULL);
1617            mCallbackData->endTrackSwitch();
1618        }
1619
1620        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1621            int32_t msec = 0;
1622            if (!mRecycledTrack->stopped()) { // check if active
1623                 (void)mRecycledTrack->pendingDuration(&msec);
1624            }
1625            mRecycledTrack->stop(); // ensure full data drain
1626            ALOGD("deleting recycled track, waiting for data drain (%d msec)", msec);
1627            if (msec > 0) {
1628                static const int32_t WAIT_LIMIT_MS = 3000;
1629                if (msec > WAIT_LIMIT_MS) {
1630                    msec = WAIT_LIMIT_MS;
1631                }
1632                usleep(msec * 1000LL);
1633            }
1634        }
1635        // An offloaded track isn't flushed because the STREAM_END is reported
1636        // slightly prematurely to allow time for the gapless track switch
1637        // but this means that if we decide not to recycle the track there
1638        // could be a small amount of residual data still playing. We leave
1639        // AudioFlinger to drain the track.
1640
1641        mRecycledTrack.clear();
1642        close_l();
1643        delete mCallbackData;
1644        mCallbackData = NULL;
1645    }
1646}
1647
1648void MediaPlayerService::AudioOutput::close_l()
1649{
1650    mTrack.clear();
1651}
1652
1653status_t MediaPlayerService::AudioOutput::open(
1654        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1655        audio_format_t format, int bufferCount,
1656        AudioCallback cb, void *cookie,
1657        audio_output_flags_t flags,
1658        const audio_offload_info_t *offloadInfo,
1659        bool doNotReconnect,
1660        uint32_t suggestedFrameCount)
1661{
1662    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1663                format, bufferCount, mSessionId, flags);
1664
1665    // offloading is only supported in callback mode for now.
1666    // offloadInfo must be present if offload flag is set
1667    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1668            ((cb == NULL) || (offloadInfo == NULL))) {
1669        return BAD_VALUE;
1670    }
1671
1672    // compute frame count for the AudioTrack internal buffer
1673    size_t frameCount;
1674    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1675        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1676    } else {
1677        // try to estimate the buffer processing fetch size from AudioFlinger.
1678        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1679        uint32_t afSampleRate;
1680        size_t afFrameCount;
1681        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1682            return NO_INIT;
1683        }
1684        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1685            return NO_INIT;
1686        }
1687        const size_t framesPerBuffer =
1688                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1689
1690        if (bufferCount == 0) {
1691            // use suggestedFrameCount
1692            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1693        }
1694        // Check argument bufferCount against the mininum buffer count
1695        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1696            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1697            bufferCount = mMinBufferCount;
1698        }
1699        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1700        // which will be the minimum size permitted.
1701        frameCount = bufferCount * framesPerBuffer;
1702    }
1703
1704    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1705        channelMask = audio_channel_out_mask_from_count(channelCount);
1706        if (0 == channelMask) {
1707            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1708            return NO_INIT;
1709        }
1710    }
1711
1712    Mutex::Autolock lock(mLock);
1713    mCallback = cb;
1714    mCallbackCookie = cookie;
1715
1716    // Check whether we can recycle the track
1717    bool reuse = false;
1718    bool bothOffloaded = false;
1719
1720    if (mRecycledTrack != 0) {
1721        // check whether we are switching between two offloaded tracks
1722        bothOffloaded = (flags & mRecycledTrack->getFlags()
1723                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1724
1725        // check if the existing track can be reused as-is, or if a new track needs to be created.
1726        reuse = true;
1727
1728        if ((mCallbackData == NULL && mCallback != NULL) ||
1729                (mCallbackData != NULL && mCallback == NULL)) {
1730            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1731            ALOGV("can't chain callback and write");
1732            reuse = false;
1733        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1734                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1735            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1736                  mRecycledTrack->getSampleRate(), sampleRate,
1737                  mRecycledTrack->channelCount(), channelCount);
1738            reuse = false;
1739        } else if (flags != mFlags) {
1740            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1741            reuse = false;
1742        } else if (mRecycledTrack->format() != format) {
1743            reuse = false;
1744        }
1745    } else {
1746        ALOGV("no track available to recycle");
1747    }
1748
1749    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1750
1751    // If we can't recycle and both tracks are offloaded
1752    // we must close the previous output before opening a new one
1753    if (bothOffloaded && !reuse) {
1754        ALOGV("both offloaded and not recycling");
1755        deleteRecycledTrack_l();
1756    }
1757
1758    sp<AudioTrack> t;
1759    CallbackData *newcbd = NULL;
1760
1761    // We don't attempt to create a new track if we are recycling an
1762    // offloaded track. But, if we are recycling a non-offloaded or we
1763    // are switching where one is offloaded and one isn't then we create
1764    // the new track in advance so that we can read additional stream info
1765
1766    if (!(reuse && bothOffloaded)) {
1767        ALOGV("creating new AudioTrack");
1768
1769        if (mCallback != NULL) {
1770            newcbd = new CallbackData(this);
1771            t = new AudioTrack(
1772                    mStreamType,
1773                    sampleRate,
1774                    format,
1775                    channelMask,
1776                    frameCount,
1777                    flags,
1778                    CallbackWrapper,
1779                    newcbd,
1780                    0,  // notification frames
1781                    mSessionId,
1782                    AudioTrack::TRANSFER_CALLBACK,
1783                    offloadInfo,
1784                    mUid,
1785                    mPid,
1786                    mAttributes,
1787                    doNotReconnect);
1788        } else {
1789            // TODO: Due to buffer memory concerns, we use a max target playback speed
1790            // based on mPlaybackRate at the time of open (instead of kMaxRequiredSpeed),
1791            // also clamping the target speed to 1.0 <= targetSpeed <= kMaxRequiredSpeed.
1792            const float targetSpeed =
1793                    std::min(std::max(mPlaybackRate.mSpeed, 1.0f), kMaxRequiredSpeed);
1794            ALOGW_IF(targetSpeed != mPlaybackRate.mSpeed,
1795                    "track target speed:%f clamped from playback speed:%f",
1796                    targetSpeed, mPlaybackRate.mSpeed);
1797            t = new AudioTrack(
1798                    mStreamType,
1799                    sampleRate,
1800                    format,
1801                    channelMask,
1802                    frameCount,
1803                    flags,
1804                    NULL, // callback
1805                    NULL, // user data
1806                    0, // notification frames
1807                    mSessionId,
1808                    AudioTrack::TRANSFER_DEFAULT,
1809                    NULL, // offload info
1810                    mUid,
1811                    mPid,
1812                    mAttributes,
1813                    doNotReconnect,
1814                    targetSpeed);
1815        }
1816
1817        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1818            ALOGE("Unable to create audio track");
1819            delete newcbd;
1820            // t goes out of scope, so reference count drops to zero
1821            return NO_INIT;
1822        } else {
1823            // successful AudioTrack initialization implies a legacy stream type was generated
1824            // from the audio attributes
1825            mStreamType = t->streamType();
1826        }
1827    }
1828
1829    if (reuse) {
1830        CHECK(mRecycledTrack != NULL);
1831
1832        if (!bothOffloaded) {
1833            if (mRecycledTrack->frameCount() != t->frameCount()) {
1834                ALOGV("framecount differs: %zu/%zu frames",
1835                      mRecycledTrack->frameCount(), t->frameCount());
1836                reuse = false;
1837            }
1838        }
1839
1840        if (reuse) {
1841            ALOGV("chaining to next output and recycling track");
1842            close_l();
1843            mTrack = mRecycledTrack;
1844            mRecycledTrack.clear();
1845            if (mCallbackData != NULL) {
1846                mCallbackData->setOutput(this);
1847            }
1848            delete newcbd;
1849            return OK;
1850        }
1851    }
1852
1853    // we're not going to reuse the track, unblock and flush it
1854    // this was done earlier if both tracks are offloaded
1855    if (!bothOffloaded) {
1856        deleteRecycledTrack_l();
1857    }
1858
1859    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1860
1861    mCallbackData = newcbd;
1862    ALOGV("setVolume");
1863    t->setVolume(mLeftVolume, mRightVolume);
1864
1865    mSampleRateHz = sampleRate;
1866    mFlags = flags;
1867    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1868    mFrameSize = t->frameSize();
1869    mTrack = t;
1870
1871    status_t res = NO_ERROR;
1872    // Note some output devices may give us a direct track even though we don't specify it.
1873    // Example: Line application b/17459982.
1874    if ((t->getFlags() & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1875        res = t->setPlaybackRate(mPlaybackRate);
1876        if (res == NO_ERROR) {
1877            t->setAuxEffectSendLevel(mSendLevel);
1878            res = t->attachAuxEffect(mAuxEffectId);
1879        }
1880    }
1881    ALOGV("open() DONE status %d", res);
1882    return res;
1883}
1884
1885status_t MediaPlayerService::AudioOutput::start()
1886{
1887    ALOGV("start");
1888    Mutex::Autolock lock(mLock);
1889    if (mCallbackData != NULL) {
1890        mCallbackData->endTrackSwitch();
1891    }
1892    if (mTrack != 0) {
1893        mTrack->setVolume(mLeftVolume, mRightVolume);
1894        mTrack->setAuxEffectSendLevel(mSendLevel);
1895        return mTrack->start();
1896    }
1897    return NO_INIT;
1898}
1899
1900void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1901    Mutex::Autolock lock(mLock);
1902    mNextOutput = nextOutput;
1903}
1904
1905void MediaPlayerService::AudioOutput::switchToNextOutput() {
1906    ALOGV("switchToNextOutput");
1907
1908    // Try to acquire the callback lock before moving track (without incurring deadlock).
1909    const unsigned kMaxSwitchTries = 100;
1910    Mutex::Autolock lock(mLock);
1911    for (unsigned tries = 0;;) {
1912        if (mTrack == 0) {
1913            return;
1914        }
1915        if (mNextOutput != NULL && mNextOutput != this) {
1916            if (mCallbackData != NULL) {
1917                // two alternative approaches
1918#if 1
1919                CallbackData *callbackData = mCallbackData;
1920                mLock.unlock();
1921                // proper acquisition sequence
1922                callbackData->lock();
1923                mLock.lock();
1924                // Caution: it is unlikely that someone deleted our callback or changed our target
1925                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1926                    // fatal if we are starved out.
1927                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1928                            "switchToNextOutput() cannot obtain correct lock sequence");
1929                    callbackData->unlock();
1930                    continue;
1931                }
1932                callbackData->mSwitching = true; // begin track switch
1933#else
1934                // tryBeginTrackSwitch() returns false if the callback has the lock.
1935                if (!mCallbackData->tryBeginTrackSwitch()) {
1936                    // fatal if we are starved out.
1937                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1938                            "switchToNextOutput() cannot obtain callback lock");
1939                    mLock.unlock();
1940                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1941                    mLock.lock();
1942                    continue;
1943                }
1944#endif
1945            }
1946
1947            Mutex::Autolock nextLock(mNextOutput->mLock);
1948
1949            // If the next output track is not NULL, then it has been
1950            // opened already for playback.
1951            // This is possible even without the next player being started,
1952            // for example, the next player could be prepared and seeked.
1953            //
1954            // Presuming it isn't advisable to force the track over.
1955             if (mNextOutput->mTrack == NULL) {
1956                ALOGD("Recycling track for gapless playback");
1957                delete mNextOutput->mCallbackData;
1958                mNextOutput->mCallbackData = mCallbackData;
1959                mNextOutput->mRecycledTrack = mTrack;
1960                mNextOutput->mSampleRateHz = mSampleRateHz;
1961                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1962                mNextOutput->mFlags = mFlags;
1963                mNextOutput->mFrameSize = mFrameSize;
1964                close_l();
1965                mCallbackData = NULL;  // destruction handled by mNextOutput
1966            } else {
1967                ALOGW("Ignoring gapless playback because next player has already started");
1968                // remove track in case resource needed for future players.
1969                if (mCallbackData != NULL) {
1970                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1971                }
1972                close_l();
1973            }
1974        }
1975        break;
1976    }
1977}
1978
1979ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1980{
1981    Mutex::Autolock lock(mLock);
1982    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1983
1984    //ALOGV("write(%p, %u)", buffer, size);
1985    if (mTrack != 0) {
1986        return mTrack->write(buffer, size, blocking);
1987    }
1988    return NO_INIT;
1989}
1990
1991void MediaPlayerService::AudioOutput::stop()
1992{
1993    ALOGV("stop");
1994    Mutex::Autolock lock(mLock);
1995    if (mTrack != 0) mTrack->stop();
1996}
1997
1998void MediaPlayerService::AudioOutput::flush()
1999{
2000    ALOGV("flush");
2001    Mutex::Autolock lock(mLock);
2002    if (mTrack != 0) mTrack->flush();
2003}
2004
2005void MediaPlayerService::AudioOutput::pause()
2006{
2007    ALOGV("pause");
2008    Mutex::Autolock lock(mLock);
2009    if (mTrack != 0) mTrack->pause();
2010}
2011
2012void MediaPlayerService::AudioOutput::close()
2013{
2014    ALOGV("close");
2015    sp<AudioTrack> track;
2016    {
2017        Mutex::Autolock lock(mLock);
2018        track = mTrack;
2019        close_l(); // clears mTrack
2020    }
2021    // destruction of the track occurs outside of mutex.
2022}
2023
2024void MediaPlayerService::AudioOutput::setVolume(float left, float right)
2025{
2026    ALOGV("setVolume(%f, %f)", left, right);
2027    Mutex::Autolock lock(mLock);
2028    mLeftVolume = left;
2029    mRightVolume = right;
2030    if (mTrack != 0) {
2031        mTrack->setVolume(left, right);
2032    }
2033}
2034
2035status_t MediaPlayerService::AudioOutput::setPlaybackRate(const AudioPlaybackRate &rate)
2036{
2037    ALOGV("setPlaybackRate(%f %f %d %d)",
2038                rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
2039    Mutex::Autolock lock(mLock);
2040    if (mTrack == 0) {
2041        // remember rate so that we can set it when the track is opened
2042        mPlaybackRate = rate;
2043        return OK;
2044    }
2045    status_t res = mTrack->setPlaybackRate(rate);
2046    if (res != NO_ERROR) {
2047        return res;
2048    }
2049    // rate.mSpeed is always greater than 0 if setPlaybackRate succeeded
2050    CHECK_GT(rate.mSpeed, 0.f);
2051    mPlaybackRate = rate;
2052    if (mSampleRateHz != 0) {
2053        mMsecsPerFrame = 1E3f / (rate.mSpeed * mSampleRateHz);
2054    }
2055    return res;
2056}
2057
2058status_t MediaPlayerService::AudioOutput::getPlaybackRate(AudioPlaybackRate *rate)
2059{
2060    ALOGV("setPlaybackRate");
2061    Mutex::Autolock lock(mLock);
2062    if (mTrack == 0) {
2063        return NO_INIT;
2064    }
2065    *rate = mTrack->getPlaybackRate();
2066    return NO_ERROR;
2067}
2068
2069status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
2070{
2071    ALOGV("setAuxEffectSendLevel(%f)", level);
2072    Mutex::Autolock lock(mLock);
2073    mSendLevel = level;
2074    if (mTrack != 0) {
2075        return mTrack->setAuxEffectSendLevel(level);
2076    }
2077    return NO_ERROR;
2078}
2079
2080status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
2081{
2082    ALOGV("attachAuxEffect(%d)", effectId);
2083    Mutex::Autolock lock(mLock);
2084    mAuxEffectId = effectId;
2085    if (mTrack != 0) {
2086        return mTrack->attachAuxEffect(effectId);
2087    }
2088    return NO_ERROR;
2089}
2090
2091// static
2092void MediaPlayerService::AudioOutput::CallbackWrapper(
2093        int event, void *cookie, void *info) {
2094    //ALOGV("callbackwrapper");
2095    CallbackData *data = (CallbackData*)cookie;
2096    // lock to ensure we aren't caught in the middle of a track switch.
2097    data->lock();
2098    AudioOutput *me = data->getOutput();
2099    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
2100    if (me == NULL) {
2101        // no output set, likely because the track was scheduled to be reused
2102        // by another player, but the format turned out to be incompatible.
2103        data->unlock();
2104        if (buffer != NULL) {
2105            buffer->size = 0;
2106        }
2107        return;
2108    }
2109
2110    switch(event) {
2111    case AudioTrack::EVENT_MORE_DATA: {
2112        size_t actualSize = (*me->mCallback)(
2113                me, buffer->raw, buffer->size, me->mCallbackCookie,
2114                CB_EVENT_FILL_BUFFER);
2115
2116        // Log when no data is returned from the callback.
2117        // (1) We may have no data (especially with network streaming sources).
2118        // (2) We may have reached the EOS and the audio track is not stopped yet.
2119        // Note that AwesomePlayer/AudioPlayer will only return zero size when it reaches the EOS.
2120        // NuPlayerRenderer will return zero when it doesn't have data (it doesn't block to fill).
2121        //
2122        // This is a benign busy-wait, with the next data request generated 10 ms or more later;
2123        // nevertheless for power reasons, we don't want to see too many of these.
2124
2125        ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
2126
2127        buffer->size = actualSize;
2128        } break;
2129
2130    case AudioTrack::EVENT_STREAM_END:
2131        // currently only occurs for offloaded callbacks
2132        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
2133        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
2134                me->mCallbackCookie, CB_EVENT_STREAM_END);
2135        break;
2136
2137    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
2138        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
2139        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
2140                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
2141        break;
2142
2143    case AudioTrack::EVENT_UNDERRUN:
2144        // This occurs when there is no data available, typically
2145        // when there is a failure to supply data to the AudioTrack.  It can also
2146        // occur in non-offloaded mode when the audio device comes out of standby.
2147        //
2148        // If an AudioTrack underruns it outputs silence. Since this happens suddenly
2149        // it may sound like an audible pop or glitch.
2150        //
2151        // The underrun event is sent once per track underrun; the condition is reset
2152        // when more data is sent to the AudioTrack.
2153        ALOGD("callbackwrapper: EVENT_UNDERRUN (discarded)");
2154        break;
2155
2156    default:
2157        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
2158    }
2159
2160    data->unlock();
2161}
2162
2163audio_session_t MediaPlayerService::AudioOutput::getSessionId() const
2164{
2165    Mutex::Autolock lock(mLock);
2166    return mSessionId;
2167}
2168
2169uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
2170{
2171    Mutex::Autolock lock(mLock);
2172    if (mTrack == 0) return 0;
2173    return mTrack->getSampleRate();
2174}
2175
2176int64_t MediaPlayerService::AudioOutput::getBufferDurationInUs() const
2177{
2178    Mutex::Autolock lock(mLock);
2179    if (mTrack == 0) {
2180        return 0;
2181    }
2182    int64_t duration;
2183    if (mTrack->getBufferDurationInUs(&duration) != OK) {
2184        return 0;
2185    }
2186    return duration;
2187}
2188
2189////////////////////////////////////////////////////////////////////////////////
2190
2191struct CallbackThread : public Thread {
2192    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
2193                   MediaPlayerBase::AudioSink::AudioCallback cb,
2194                   void *cookie);
2195
2196protected:
2197    virtual ~CallbackThread();
2198
2199    virtual bool threadLoop();
2200
2201private:
2202    wp<MediaPlayerBase::AudioSink> mSink;
2203    MediaPlayerBase::AudioSink::AudioCallback mCallback;
2204    void *mCookie;
2205    void *mBuffer;
2206    size_t mBufferSize;
2207
2208    CallbackThread(const CallbackThread &);
2209    CallbackThread &operator=(const CallbackThread &);
2210};
2211
2212CallbackThread::CallbackThread(
2213        const wp<MediaPlayerBase::AudioSink> &sink,
2214        MediaPlayerBase::AudioSink::AudioCallback cb,
2215        void *cookie)
2216    : mSink(sink),
2217      mCallback(cb),
2218      mCookie(cookie),
2219      mBuffer(NULL),
2220      mBufferSize(0) {
2221}
2222
2223CallbackThread::~CallbackThread() {
2224    if (mBuffer) {
2225        free(mBuffer);
2226        mBuffer = NULL;
2227    }
2228}
2229
2230bool CallbackThread::threadLoop() {
2231    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
2232    if (sink == NULL) {
2233        return false;
2234    }
2235
2236    if (mBuffer == NULL) {
2237        mBufferSize = sink->bufferSize();
2238        mBuffer = malloc(mBufferSize);
2239    }
2240
2241    size_t actualSize =
2242        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
2243                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
2244
2245    if (actualSize > 0) {
2246        sink->write(mBuffer, actualSize);
2247        // Could return false on sink->write() error or short count.
2248        // Not necessarily appropriate but would work for AudioCache behavior.
2249    }
2250
2251    return true;
2252}
2253
2254////////////////////////////////////////////////////////////////////////////////
2255
2256void MediaPlayerService::addBatteryData(uint32_t params)
2257{
2258    Mutex::Autolock lock(mLock);
2259
2260    int32_t time = systemTime() / 1000000L;
2261
2262    // change audio output devices. This notification comes from AudioFlinger
2263    if ((params & kBatteryDataSpeakerOn)
2264            || (params & kBatteryDataOtherAudioDeviceOn)) {
2265
2266        int deviceOn[NUM_AUDIO_DEVICES];
2267        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2268            deviceOn[i] = 0;
2269        }
2270
2271        if ((params & kBatteryDataSpeakerOn)
2272                && (params & kBatteryDataOtherAudioDeviceOn)) {
2273            deviceOn[SPEAKER_AND_OTHER] = 1;
2274        } else if (params & kBatteryDataSpeakerOn) {
2275            deviceOn[SPEAKER] = 1;
2276        } else {
2277            deviceOn[OTHER_AUDIO_DEVICE] = 1;
2278        }
2279
2280        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2281            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
2282
2283                if (mBatteryAudio.refCount > 0) { // if playing audio
2284                    if (!deviceOn[i]) {
2285                        mBatteryAudio.lastTime[i] += time;
2286                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2287                        mBatteryAudio.lastTime[i] = 0;
2288                    } else {
2289                        mBatteryAudio.lastTime[i] = 0 - time;
2290                    }
2291                }
2292
2293                mBatteryAudio.deviceOn[i] = deviceOn[i];
2294            }
2295        }
2296        return;
2297    }
2298
2299    // an audio stream is started
2300    if (params & kBatteryDataAudioFlingerStart) {
2301        // record the start time only if currently no other audio
2302        // is being played
2303        if (mBatteryAudio.refCount == 0) {
2304            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2305                if (mBatteryAudio.deviceOn[i]) {
2306                    mBatteryAudio.lastTime[i] -= time;
2307                }
2308            }
2309        }
2310
2311        mBatteryAudio.refCount ++;
2312        return;
2313
2314    } else if (params & kBatteryDataAudioFlingerStop) {
2315        if (mBatteryAudio.refCount <= 0) {
2316            ALOGW("Battery track warning: refCount is <= 0");
2317            return;
2318        }
2319
2320        // record the stop time only if currently this is the only
2321        // audio being played
2322        if (mBatteryAudio.refCount == 1) {
2323            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2324                if (mBatteryAudio.deviceOn[i]) {
2325                    mBatteryAudio.lastTime[i] += time;
2326                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2327                    mBatteryAudio.lastTime[i] = 0;
2328                }
2329            }
2330        }
2331
2332        mBatteryAudio.refCount --;
2333        return;
2334    }
2335
2336    int uid = IPCThreadState::self()->getCallingUid();
2337    if (uid == AID_MEDIA) {
2338        return;
2339    }
2340    int index = mBatteryData.indexOfKey(uid);
2341
2342    if (index < 0) { // create a new entry for this UID
2343        BatteryUsageInfo info;
2344        info.audioTotalTime = 0;
2345        info.videoTotalTime = 0;
2346        info.audioLastTime = 0;
2347        info.videoLastTime = 0;
2348        info.refCount = 0;
2349
2350        if (mBatteryData.add(uid, info) == NO_MEMORY) {
2351            ALOGE("Battery track error: no memory for new app");
2352            return;
2353        }
2354    }
2355
2356    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
2357
2358    if (params & kBatteryDataCodecStarted) {
2359        if (params & kBatteryDataTrackAudio) {
2360            info.audioLastTime -= time;
2361            info.refCount ++;
2362        }
2363        if (params & kBatteryDataTrackVideo) {
2364            info.videoLastTime -= time;
2365            info.refCount ++;
2366        }
2367    } else {
2368        if (info.refCount == 0) {
2369            ALOGW("Battery track warning: refCount is already 0");
2370            return;
2371        } else if (info.refCount < 0) {
2372            ALOGE("Battery track error: refCount < 0");
2373            mBatteryData.removeItem(uid);
2374            return;
2375        }
2376
2377        if (params & kBatteryDataTrackAudio) {
2378            info.audioLastTime += time;
2379            info.refCount --;
2380        }
2381        if (params & kBatteryDataTrackVideo) {
2382            info.videoLastTime += time;
2383            info.refCount --;
2384        }
2385
2386        // no stream is being played by this UID
2387        if (info.refCount == 0) {
2388            info.audioTotalTime += info.audioLastTime;
2389            info.audioLastTime = 0;
2390            info.videoTotalTime += info.videoLastTime;
2391            info.videoLastTime = 0;
2392        }
2393    }
2394}
2395
2396status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2397    Mutex::Autolock lock(mLock);
2398
2399    // audio output devices usage
2400    int32_t time = systemTime() / 1000000L; //in ms
2401    int32_t totalTime;
2402
2403    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2404        totalTime = mBatteryAudio.totalTime[i];
2405
2406        if (mBatteryAudio.deviceOn[i]
2407            && (mBatteryAudio.lastTime[i] != 0)) {
2408                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2409                totalTime += tmpTime;
2410        }
2411
2412        reply->writeInt32(totalTime);
2413        // reset the total time
2414        mBatteryAudio.totalTime[i] = 0;
2415   }
2416
2417    // codec usage
2418    BatteryUsageInfo info;
2419    int size = mBatteryData.size();
2420
2421    reply->writeInt32(size);
2422    int i = 0;
2423
2424    while (i < size) {
2425        info = mBatteryData.valueAt(i);
2426
2427        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2428        reply->writeInt32(info.audioTotalTime);
2429        reply->writeInt32(info.videoTotalTime);
2430
2431        info.audioTotalTime = 0;
2432        info.videoTotalTime = 0;
2433
2434        // remove the UID entry where no stream is being played
2435        if (info.refCount <= 0) {
2436            mBatteryData.removeItemsAt(i);
2437            size --;
2438            i --;
2439        }
2440        i++;
2441    }
2442    return NO_ERROR;
2443}
2444} // namespace android
2445