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(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(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    mExtractorDeathListener = new ServiceDeathNotifier(binder, p, MEDIAEXTRACTOR_PROCESS_DEATH);
688    binder->linkToDeath(mExtractorDeathListener);
689
690    binder = sm->getService(String16("media.codec"));
691    mCodecDeathListener = new ServiceDeathNotifier(binder, p, MEDIACODEC_PROCESS_DEATH);
692    binder->linkToDeath(mCodecDeathListener);
693
694    if (!p->hardwareOutput()) {
695        Mutex::Autolock l(mLock);
696        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
697                mPid, mAudioAttributes);
698        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
699    }
700
701    return p;
702}
703
704void MediaPlayerService::Client::setDataSource_post(
705        const sp<MediaPlayerBase>& p,
706        status_t status)
707{
708    ALOGV(" setDataSource");
709    mStatus = status;
710    if (mStatus != OK) {
711        ALOGE("  error: %d", mStatus);
712        return;
713    }
714
715    // Set the re-transmission endpoint if one was chosen.
716    if (mRetransmitEndpointValid) {
717        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
718        if (mStatus != NO_ERROR) {
719            ALOGE("setRetransmitEndpoint error: %d", mStatus);
720        }
721    }
722
723    if (mStatus == OK) {
724        mPlayer = p;
725    }
726}
727
728status_t MediaPlayerService::Client::setDataSource(
729        const sp<IMediaHTTPService> &httpService,
730        const char *url,
731        const KeyedVector<String8, String8> *headers)
732{
733    ALOGV("setDataSource(%s)", url);
734    if (url == NULL)
735        return UNKNOWN_ERROR;
736
737    if ((strncmp(url, "http://", 7) == 0) ||
738        (strncmp(url, "https://", 8) == 0) ||
739        (strncmp(url, "rtsp://", 7) == 0)) {
740        if (!checkPermission("android.permission.INTERNET")) {
741            return PERMISSION_DENIED;
742        }
743    }
744
745    if (strncmp(url, "content://", 10) == 0) {
746        // get a filedescriptor for the content Uri and
747        // pass it to the setDataSource(fd) method
748
749        String16 url16(url);
750        int fd = android::openContentProviderFile(url16);
751        if (fd < 0)
752        {
753            ALOGE("Couldn't open fd for %s", url);
754            return UNKNOWN_ERROR;
755        }
756        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
757        close(fd);
758        return mStatus;
759    } else {
760        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
761        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
762        if (p == NULL) {
763            return NO_INIT;
764        }
765
766        setDataSource_post(p, p->setDataSource(httpService, url, headers));
767        return mStatus;
768    }
769}
770
771status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
772{
773    ALOGV("setDataSource fd=%d (%s), offset=%lld, length=%lld",
774            fd, nameForFd(fd).c_str(), (long long) offset, (long long) length);
775    struct stat sb;
776    int ret = fstat(fd, &sb);
777    if (ret != 0) {
778        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
779        return UNKNOWN_ERROR;
780    }
781
782    ALOGV("st_dev  = %llu", static_cast<unsigned long long>(sb.st_dev));
783    ALOGV("st_mode = %u", sb.st_mode);
784    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
785    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
786    ALOGV("st_size = %llu", static_cast<unsigned long long>(sb.st_size));
787
788    if (offset >= sb.st_size) {
789        ALOGE("offset error");
790        return UNKNOWN_ERROR;
791    }
792    if (offset + length > sb.st_size) {
793        length = sb.st_size - offset;
794        ALOGV("calculated length = %lld", (long long)length);
795    }
796
797    player_type playerType = MediaPlayerFactory::getPlayerType(this,
798                                                               fd,
799                                                               offset,
800                                                               length);
801    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
802    if (p == NULL) {
803        return NO_INIT;
804    }
805
806    // now set data source
807    setDataSource_post(p, p->setDataSource(fd, offset, length));
808    return mStatus;
809}
810
811status_t MediaPlayerService::Client::setDataSource(
812        const sp<IStreamSource> &source) {
813    // create the right type of player
814    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
815    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
816    if (p == NULL) {
817        return NO_INIT;
818    }
819
820    // now set data source
821    setDataSource_post(p, p->setDataSource(source));
822    return mStatus;
823}
824
825status_t MediaPlayerService::Client::setDataSource(
826        const sp<IDataSource> &source) {
827    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
828    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
829    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
830    if (p == NULL) {
831        return NO_INIT;
832    }
833    // now set data source
834    setDataSource_post(p, p->setDataSource(dataSource));
835    return mStatus;
836}
837
838void MediaPlayerService::Client::disconnectNativeWindow() {
839    if (mConnectedWindow != NULL) {
840        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
841                NATIVE_WINDOW_API_MEDIA);
842
843        if (err != OK) {
844            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
845                    strerror(-err), err);
846        }
847    }
848    mConnectedWindow.clear();
849}
850
851status_t MediaPlayerService::Client::setVideoSurfaceTexture(
852        const sp<IGraphicBufferProducer>& bufferProducer)
853{
854    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
855    sp<MediaPlayerBase> p = getPlayer();
856    if (p == 0) return UNKNOWN_ERROR;
857
858    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
859    if (mConnectedWindowBinder == binder) {
860        return OK;
861    }
862
863    sp<ANativeWindow> anw;
864    if (bufferProducer != NULL) {
865        anw = new Surface(bufferProducer, true /* controlledByApp */);
866        status_t err = native_window_api_connect(anw.get(),
867                NATIVE_WINDOW_API_MEDIA);
868
869        if (err != OK) {
870            ALOGE("setVideoSurfaceTexture failed: %d", err);
871            // Note that we must do the reset before disconnecting from the ANW.
872            // Otherwise queue/dequeue calls could be made on the disconnected
873            // ANW, which may result in errors.
874            reset();
875
876            disconnectNativeWindow();
877
878            return err;
879        }
880    }
881
882    // Note that we must set the player's new GraphicBufferProducer before
883    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
884    // on the disconnected ANW, which may result in errors.
885    status_t err = p->setVideoSurfaceTexture(bufferProducer);
886
887    disconnectNativeWindow();
888
889    mConnectedWindow = anw;
890
891    if (err == OK) {
892        mConnectedWindowBinder = binder;
893    } else {
894        disconnectNativeWindow();
895    }
896
897    return err;
898}
899
900status_t MediaPlayerService::Client::invoke(const Parcel& request,
901                                            Parcel *reply)
902{
903    sp<MediaPlayerBase> p = getPlayer();
904    if (p == NULL) return UNKNOWN_ERROR;
905    return p->invoke(request, reply);
906}
907
908// This call doesn't need to access the native player.
909status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
910{
911    status_t status;
912    media::Metadata::Filter allow, drop;
913
914    if (unmarshallFilter(filter, &allow, &status) &&
915        unmarshallFilter(filter, &drop, &status)) {
916        Mutex::Autolock lock(mLock);
917
918        mMetadataAllow = allow;
919        mMetadataDrop = drop;
920    }
921    return status;
922}
923
924status_t MediaPlayerService::Client::getMetadata(
925        bool update_only, bool /*apply_filter*/, Parcel *reply)
926{
927    sp<MediaPlayerBase> player = getPlayer();
928    if (player == 0) return UNKNOWN_ERROR;
929
930    status_t status;
931    // Placeholder for the return code, updated by the caller.
932    reply->writeInt32(-1);
933
934    media::Metadata::Filter ids;
935
936    // We don't block notifications while we fetch the data. We clear
937    // mMetadataUpdated first so we don't lose notifications happening
938    // during the rest of this call.
939    {
940        Mutex::Autolock lock(mLock);
941        if (update_only) {
942            ids = mMetadataUpdated;
943        }
944        mMetadataUpdated.clear();
945    }
946
947    media::Metadata metadata(reply);
948
949    metadata.appendHeader();
950    status = player->getMetadata(ids, reply);
951
952    if (status != OK) {
953        metadata.resetParcel();
954        ALOGE("getMetadata failed %d", status);
955        return status;
956    }
957
958    // FIXME: Implement filtering on the result. Not critical since
959    // filtering takes place on the update notifications already. This
960    // would be when all the metadata are fetch and a filter is set.
961
962    // Everything is fine, update the metadata length.
963    metadata.updateLength();
964    return OK;
965}
966
967status_t MediaPlayerService::Client::prepareAsync()
968{
969    ALOGV("[%d] prepareAsync", mConnId);
970    sp<MediaPlayerBase> p = getPlayer();
971    if (p == 0) return UNKNOWN_ERROR;
972    status_t ret = p->prepareAsync();
973#if CALLBACK_ANTAGONIZER
974    ALOGD("start Antagonizer");
975    if (ret == NO_ERROR) mAntagonizer->start();
976#endif
977    return ret;
978}
979
980status_t MediaPlayerService::Client::start()
981{
982    ALOGV("[%d] start", mConnId);
983    sp<MediaPlayerBase> p = getPlayer();
984    if (p == 0) return UNKNOWN_ERROR;
985    p->setLooping(mLoop);
986    return p->start();
987}
988
989status_t MediaPlayerService::Client::stop()
990{
991    ALOGV("[%d] stop", mConnId);
992    sp<MediaPlayerBase> p = getPlayer();
993    if (p == 0) return UNKNOWN_ERROR;
994    return p->stop();
995}
996
997status_t MediaPlayerService::Client::pause()
998{
999    ALOGV("[%d] pause", mConnId);
1000    sp<MediaPlayerBase> p = getPlayer();
1001    if (p == 0) return UNKNOWN_ERROR;
1002    return p->pause();
1003}
1004
1005status_t MediaPlayerService::Client::isPlaying(bool* state)
1006{
1007    *state = false;
1008    sp<MediaPlayerBase> p = getPlayer();
1009    if (p == 0) return UNKNOWN_ERROR;
1010    *state = p->isPlaying();
1011    ALOGV("[%d] isPlaying: %d", mConnId, *state);
1012    return NO_ERROR;
1013}
1014
1015status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
1016{
1017    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
1018            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
1019    sp<MediaPlayerBase> p = getPlayer();
1020    if (p == 0) return UNKNOWN_ERROR;
1021    return p->setPlaybackSettings(rate);
1022}
1023
1024status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
1025{
1026    sp<MediaPlayerBase> p = getPlayer();
1027    if (p == 0) return UNKNOWN_ERROR;
1028    status_t ret = p->getPlaybackSettings(rate);
1029    if (ret == NO_ERROR) {
1030        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
1031                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
1032    } else {
1033        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
1034    }
1035    return ret;
1036}
1037
1038status_t MediaPlayerService::Client::setSyncSettings(
1039        const AVSyncSettings& sync, float videoFpsHint)
1040{
1041    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1042            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1043    sp<MediaPlayerBase> p = getPlayer();
1044    if (p == 0) return UNKNOWN_ERROR;
1045    return p->setSyncSettings(sync, videoFpsHint);
1046}
1047
1048status_t MediaPlayerService::Client::getSyncSettings(
1049        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1050{
1051    sp<MediaPlayerBase> p = getPlayer();
1052    if (p == 0) return UNKNOWN_ERROR;
1053    status_t ret = p->getSyncSettings(sync, videoFps);
1054    if (ret == NO_ERROR) {
1055        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1056                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1057    } else {
1058        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1059    }
1060    return ret;
1061}
1062
1063status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1064{
1065    ALOGV("getCurrentPosition");
1066    sp<MediaPlayerBase> p = getPlayer();
1067    if (p == 0) return UNKNOWN_ERROR;
1068    status_t ret = p->getCurrentPosition(msec);
1069    if (ret == NO_ERROR) {
1070        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1071    } else {
1072        ALOGE("getCurrentPosition returned %d", ret);
1073    }
1074    return ret;
1075}
1076
1077status_t MediaPlayerService::Client::getDuration(int *msec)
1078{
1079    ALOGV("getDuration");
1080    sp<MediaPlayerBase> p = getPlayer();
1081    if (p == 0) return UNKNOWN_ERROR;
1082    status_t ret = p->getDuration(msec);
1083    if (ret == NO_ERROR) {
1084        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1085    } else {
1086        ALOGE("getDuration returned %d", ret);
1087    }
1088    return ret;
1089}
1090
1091status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1092    ALOGV("setNextPlayer");
1093    Mutex::Autolock l(mLock);
1094    sp<Client> c = static_cast<Client*>(player.get());
1095    if (c != NULL && !mService->hasClient(c)) {
1096      return BAD_VALUE;
1097    }
1098
1099    mNextClient = c;
1100
1101    if (c != NULL) {
1102        if (mAudioOutput != NULL) {
1103            mAudioOutput->setNextOutput(c->mAudioOutput);
1104        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1105            ALOGE("no current audio output");
1106        }
1107
1108        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1109            mPlayer->setNextPlayer(mNextClient->getPlayer());
1110        }
1111    }
1112
1113    return OK;
1114}
1115
1116status_t MediaPlayerService::Client::seekTo(int msec)
1117{
1118    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1119    sp<MediaPlayerBase> p = getPlayer();
1120    if (p == 0) return UNKNOWN_ERROR;
1121    return p->seekTo(msec);
1122}
1123
1124status_t MediaPlayerService::Client::reset()
1125{
1126    ALOGV("[%d] reset", mConnId);
1127    mRetransmitEndpointValid = false;
1128    sp<MediaPlayerBase> p = getPlayer();
1129    if (p == 0) return UNKNOWN_ERROR;
1130    return p->reset();
1131}
1132
1133status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1134{
1135    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1136    // TODO: for hardware output, call player instead
1137    Mutex::Autolock l(mLock);
1138    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1139    return NO_ERROR;
1140}
1141
1142status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1143{
1144    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1145    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1146    if (mAudioAttributes == NULL) {
1147        return NO_MEMORY;
1148    }
1149    unmarshallAudioAttributes(parcel, mAudioAttributes);
1150
1151    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1152            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1153            mAudioAttributes->tags);
1154
1155    if (mAudioOutput != 0) {
1156        mAudioOutput->setAudioAttributes(mAudioAttributes);
1157    }
1158    return NO_ERROR;
1159}
1160
1161status_t MediaPlayerService::Client::setLooping(int loop)
1162{
1163    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1164    mLoop = loop;
1165    sp<MediaPlayerBase> p = getPlayer();
1166    if (p != 0) return p->setLooping(loop);
1167    return NO_ERROR;
1168}
1169
1170status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1171{
1172    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1173
1174    // for hardware output, call player instead
1175    sp<MediaPlayerBase> p = getPlayer();
1176    {
1177      Mutex::Autolock l(mLock);
1178      if (p != 0 && p->hardwareOutput()) {
1179          MediaPlayerHWInterface* hwp =
1180                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1181          return hwp->setVolume(leftVolume, rightVolume);
1182      } else {
1183          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1184          return NO_ERROR;
1185      }
1186    }
1187
1188    return NO_ERROR;
1189}
1190
1191status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1192{
1193    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1194    Mutex::Autolock l(mLock);
1195    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1196    return NO_ERROR;
1197}
1198
1199status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1200{
1201    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1202    Mutex::Autolock l(mLock);
1203    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1204    return NO_ERROR;
1205}
1206
1207status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1208    ALOGV("[%d] setParameter(%d)", mConnId, key);
1209    switch (key) {
1210    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1211    {
1212        Mutex::Autolock l(mLock);
1213        return setAudioAttributes_l(request);
1214    }
1215    default:
1216        sp<MediaPlayerBase> p = getPlayer();
1217        if (p == 0) { return UNKNOWN_ERROR; }
1218        return p->setParameter(key, request);
1219    }
1220}
1221
1222status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1223    ALOGV("[%d] getParameter(%d)", mConnId, key);
1224    sp<MediaPlayerBase> p = getPlayer();
1225    if (p == 0) return UNKNOWN_ERROR;
1226    return p->getParameter(key, reply);
1227}
1228
1229status_t MediaPlayerService::Client::setRetransmitEndpoint(
1230        const struct sockaddr_in* endpoint) {
1231
1232    if (NULL != endpoint) {
1233        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1234        uint16_t p = ntohs(endpoint->sin_port);
1235        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1236                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1237    } else {
1238        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1239    }
1240
1241    sp<MediaPlayerBase> p = getPlayer();
1242
1243    // Right now, the only valid time to set a retransmit endpoint is before
1244    // player selection has been made (since the presence or absence of a
1245    // retransmit endpoint is going to determine which player is selected during
1246    // setDataSource).
1247    if (p != 0) return INVALID_OPERATION;
1248
1249    if (NULL != endpoint) {
1250        mRetransmitEndpoint = *endpoint;
1251        mRetransmitEndpointValid = true;
1252    } else {
1253        mRetransmitEndpointValid = false;
1254    }
1255
1256    return NO_ERROR;
1257}
1258
1259status_t MediaPlayerService::Client::getRetransmitEndpoint(
1260        struct sockaddr_in* endpoint)
1261{
1262    if (NULL == endpoint)
1263        return BAD_VALUE;
1264
1265    sp<MediaPlayerBase> p = getPlayer();
1266
1267    if (p != NULL)
1268        return p->getRetransmitEndpoint(endpoint);
1269
1270    if (!mRetransmitEndpointValid)
1271        return NO_INIT;
1272
1273    *endpoint = mRetransmitEndpoint;
1274
1275    return NO_ERROR;
1276}
1277
1278void MediaPlayerService::Client::notify(
1279        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1280{
1281    Client* client = static_cast<Client*>(cookie);
1282    if (client == NULL) {
1283        return;
1284    }
1285
1286    sp<IMediaPlayerClient> c;
1287    {
1288        Mutex::Autolock l(client->mLock);
1289        c = client->mClient;
1290        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1291            if (client->mAudioOutput != NULL)
1292                client->mAudioOutput->switchToNextOutput();
1293            client->mNextClient->start();
1294            if (client->mNextClient->mClient != NULL) {
1295                client->mNextClient->mClient->notify(
1296                        MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1297            }
1298        }
1299    }
1300
1301    if (MEDIA_INFO == msg &&
1302        MEDIA_INFO_METADATA_UPDATE == ext1) {
1303        const media::Metadata::Type metadata_type = ext2;
1304
1305        if(client->shouldDropMetadata(metadata_type)) {
1306            return;
1307        }
1308
1309        // Update the list of metadata that have changed. getMetadata
1310        // also access mMetadataUpdated and clears it.
1311        client->addNewMetadataUpdate(metadata_type);
1312    }
1313
1314    if (c != NULL) {
1315        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1316        c->notify(msg, ext1, ext2, obj);
1317    }
1318}
1319
1320
1321bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1322{
1323    Mutex::Autolock lock(mLock);
1324
1325    if (findMetadata(mMetadataDrop, code)) {
1326        return true;
1327    }
1328
1329    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1330        return false;
1331    } else {
1332        return true;
1333    }
1334}
1335
1336
1337void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1338    Mutex::Autolock lock(mLock);
1339    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1340        mMetadataUpdated.add(metadata_type);
1341    }
1342}
1343
1344#if CALLBACK_ANTAGONIZER
1345const int Antagonizer::interval = 10000; // 10 msecs
1346
1347Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1348    mExit(false), mActive(false), mClient(client), mCb(cb)
1349{
1350    createThread(callbackThread, this);
1351}
1352
1353void Antagonizer::kill()
1354{
1355    Mutex::Autolock _l(mLock);
1356    mActive = false;
1357    mExit = true;
1358    mCondition.wait(mLock);
1359}
1360
1361int Antagonizer::callbackThread(void* user)
1362{
1363    ALOGD("Antagonizer started");
1364    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1365    while (!p->mExit) {
1366        if (p->mActive) {
1367            ALOGV("send event");
1368            p->mCb(p->mClient, 0, 0, 0);
1369        }
1370        usleep(interval);
1371    }
1372    Mutex::Autolock _l(p->mLock);
1373    p->mCondition.signal();
1374    ALOGD("Antagonizer stopped");
1375    return 0;
1376}
1377#endif
1378
1379#undef LOG_TAG
1380#define LOG_TAG "AudioSink"
1381MediaPlayerService::AudioOutput::AudioOutput(audio_session_t sessionId, int uid, int pid,
1382        const audio_attributes_t* attr)
1383    : mCallback(NULL),
1384      mCallbackCookie(NULL),
1385      mCallbackData(NULL),
1386      mStreamType(AUDIO_STREAM_MUSIC),
1387      mLeftVolume(1.0),
1388      mRightVolume(1.0),
1389      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1390      mSampleRateHz(0),
1391      mMsecsPerFrame(0),
1392      mFrameSize(0),
1393      mSessionId(sessionId),
1394      mUid(uid),
1395      mPid(pid),
1396      mSendLevel(0.0),
1397      mAuxEffectId(0),
1398      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1399{
1400    ALOGV("AudioOutput(%d)", sessionId);
1401    if (attr != NULL) {
1402        mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1403        if (mAttributes != NULL) {
1404            memcpy(mAttributes, attr, sizeof(audio_attributes_t));
1405            mStreamType = audio_attributes_to_stream_type(attr);
1406        }
1407    } else {
1408        mAttributes = NULL;
1409    }
1410
1411    setMinBufferCount();
1412}
1413
1414MediaPlayerService::AudioOutput::~AudioOutput()
1415{
1416    close();
1417    free(mAttributes);
1418    delete mCallbackData;
1419}
1420
1421//static
1422void MediaPlayerService::AudioOutput::setMinBufferCount()
1423{
1424    char value[PROPERTY_VALUE_MAX];
1425    if (property_get("ro.kernel.qemu", value, 0)) {
1426        mIsOnEmulator = true;
1427        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1428    }
1429}
1430
1431// static
1432bool MediaPlayerService::AudioOutput::isOnEmulator()
1433{
1434    setMinBufferCount(); // benign race wrt other threads
1435    return mIsOnEmulator;
1436}
1437
1438// static
1439int MediaPlayerService::AudioOutput::getMinBufferCount()
1440{
1441    setMinBufferCount(); // benign race wrt other threads
1442    return mMinBufferCount;
1443}
1444
1445ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1446{
1447    Mutex::Autolock lock(mLock);
1448    if (mTrack == 0) return NO_INIT;
1449    return mTrack->frameCount() * mFrameSize;
1450}
1451
1452ssize_t MediaPlayerService::AudioOutput::frameCount() const
1453{
1454    Mutex::Autolock lock(mLock);
1455    if (mTrack == 0) return NO_INIT;
1456    return mTrack->frameCount();
1457}
1458
1459ssize_t MediaPlayerService::AudioOutput::channelCount() const
1460{
1461    Mutex::Autolock lock(mLock);
1462    if (mTrack == 0) return NO_INIT;
1463    return mTrack->channelCount();
1464}
1465
1466ssize_t MediaPlayerService::AudioOutput::frameSize() const
1467{
1468    Mutex::Autolock lock(mLock);
1469    if (mTrack == 0) return NO_INIT;
1470    return mFrameSize;
1471}
1472
1473uint32_t MediaPlayerService::AudioOutput::latency () const
1474{
1475    Mutex::Autolock lock(mLock);
1476    if (mTrack == 0) return 0;
1477    return mTrack->latency();
1478}
1479
1480float MediaPlayerService::AudioOutput::msecsPerFrame() const
1481{
1482    Mutex::Autolock lock(mLock);
1483    return mMsecsPerFrame;
1484}
1485
1486status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1487{
1488    Mutex::Autolock lock(mLock);
1489    if (mTrack == 0) return NO_INIT;
1490    return mTrack->getPosition(position);
1491}
1492
1493status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1494{
1495    Mutex::Autolock lock(mLock);
1496    if (mTrack == 0) return NO_INIT;
1497    return mTrack->getTimestamp(ts);
1498}
1499
1500// TODO: Remove unnecessary calls to getPlayedOutDurationUs()
1501// as it acquires locks and may query the audio driver.
1502//
1503// Some calls could conceivably retrieve extrapolated data instead of
1504// accessing getTimestamp() or getPosition() every time a data buffer with
1505// a media time is received.
1506//
1507// Calculate duration of played samples if played at normal rate (i.e., 1.0).
1508int64_t MediaPlayerService::AudioOutput::getPlayedOutDurationUs(int64_t nowUs) const
1509{
1510    Mutex::Autolock lock(mLock);
1511    if (mTrack == 0 || mSampleRateHz == 0) {
1512        return 0;
1513    }
1514
1515    uint32_t numFramesPlayed;
1516    int64_t numFramesPlayedAt;
1517    AudioTimestamp ts;
1518    static const int64_t kStaleTimestamp100ms = 100000;
1519
1520    status_t res = mTrack->getTimestamp(ts);
1521    if (res == OK) {                 // case 1: mixing audio tracks and offloaded tracks.
1522        numFramesPlayed = ts.mPosition;
1523        numFramesPlayedAt = ts.mTime.tv_sec * 1000000LL + ts.mTime.tv_nsec / 1000;
1524        const int64_t timestampAge = nowUs - numFramesPlayedAt;
1525        if (timestampAge > kStaleTimestamp100ms) {
1526            // This is an audio FIXME.
1527            // getTimestamp returns a timestamp which may come from audio mixing threads.
1528            // After pausing, the MixerThread may go idle, thus the mTime estimate may
1529            // become stale. Assuming that the MixerThread runs 20ms, with FastMixer at 5ms,
1530            // the max latency should be about 25ms with an average around 12ms (to be verified).
1531            // For safety we use 100ms.
1532            ALOGV("getTimestamp: returned stale timestamp nowUs(%lld) numFramesPlayedAt(%lld)",
1533                    (long long)nowUs, (long long)numFramesPlayedAt);
1534            numFramesPlayedAt = nowUs - kStaleTimestamp100ms;
1535        }
1536        //ALOGD("getTimestamp: OK %d %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1537    } else if (res == WOULD_BLOCK) { // case 2: transitory state on start of a new track
1538        numFramesPlayed = 0;
1539        numFramesPlayedAt = nowUs;
1540        //ALOGD("getTimestamp: WOULD_BLOCK %d %lld",
1541        //        numFramesPlayed, (long long)numFramesPlayedAt);
1542    } else {                         // case 3: transitory at new track or audio fast tracks.
1543        res = mTrack->getPosition(&numFramesPlayed);
1544        CHECK_EQ(res, (status_t)OK);
1545        numFramesPlayedAt = nowUs;
1546        numFramesPlayedAt += 1000LL * mTrack->latency() / 2; /* XXX */
1547        //ALOGD("getPosition: %u %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1548    }
1549
1550    // CHECK_EQ(numFramesPlayed & (1 << 31), 0);  // can't be negative until 12.4 hrs, test
1551    // TODO: remove the (int32_t) casting below as it may overflow at 12.4 hours.
1552    int64_t durationUs = (int64_t)((int32_t)numFramesPlayed * 1000000LL / mSampleRateHz)
1553            + nowUs - numFramesPlayedAt;
1554    if (durationUs < 0) {
1555        // Occurs when numFramesPlayed position is very small and the following:
1556        // (1) In case 1, the time nowUs is computed before getTimestamp() is called and
1557        //     numFramesPlayedAt is greater than nowUs by time more than numFramesPlayed.
1558        // (2) In case 3, using getPosition and adding mAudioSink->latency() to
1559        //     numFramesPlayedAt, by a time amount greater than numFramesPlayed.
1560        //
1561        // Both of these are transitory conditions.
1562        ALOGV("getPlayedOutDurationUs: negative duration %lld set to zero", (long long)durationUs);
1563        durationUs = 0;
1564    }
1565    ALOGV("getPlayedOutDurationUs(%lld) nowUs(%lld) frames(%u) framesAt(%lld)",
1566            (long long)durationUs, (long long)nowUs, numFramesPlayed, (long long)numFramesPlayedAt);
1567    return durationUs;
1568}
1569
1570status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1571{
1572    Mutex::Autolock lock(mLock);
1573    if (mTrack == 0) return NO_INIT;
1574    ExtendedTimestamp ets;
1575    status_t status = mTrack->getTimestamp(&ets);
1576    if (status == OK || status == WOULD_BLOCK) {
1577        *frameswritten = (uint32_t)ets.mPosition[ExtendedTimestamp::LOCATION_CLIENT];
1578    }
1579    return status;
1580}
1581
1582status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1583{
1584    Mutex::Autolock lock(mLock);
1585    if (mTrack == 0) return NO_INIT;
1586    return mTrack->setParameters(keyValuePairs);
1587}
1588
1589String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1590{
1591    Mutex::Autolock lock(mLock);
1592    if (mTrack == 0) return String8::empty();
1593    return mTrack->getParameters(keys);
1594}
1595
1596void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1597    Mutex::Autolock lock(mLock);
1598    if (attributes == NULL) {
1599        free(mAttributes);
1600        mAttributes = NULL;
1601    } else {
1602        if (mAttributes == NULL) {
1603            mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1604        }
1605        memcpy(mAttributes, attributes, sizeof(audio_attributes_t));
1606        mStreamType = audio_attributes_to_stream_type(attributes);
1607    }
1608}
1609
1610void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1611{
1612    Mutex::Autolock lock(mLock);
1613    // do not allow direct stream type modification if attributes have been set
1614    if (mAttributes == NULL) {
1615        mStreamType = streamType;
1616    }
1617}
1618
1619void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1620{
1621    ALOGV("deleteRecycledTrack_l");
1622    if (mRecycledTrack != 0) {
1623
1624        if (mCallbackData != NULL) {
1625            mCallbackData->setOutput(NULL);
1626            mCallbackData->endTrackSwitch();
1627        }
1628
1629        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1630            int32_t msec = 0;
1631            if (!mRecycledTrack->stopped()) { // check if active
1632                 (void)mRecycledTrack->pendingDuration(&msec);
1633            }
1634            mRecycledTrack->stop(); // ensure full data drain
1635            ALOGD("deleting recycled track, waiting for data drain (%d msec)", msec);
1636            if (msec > 0) {
1637                static const int32_t WAIT_LIMIT_MS = 3000;
1638                if (msec > WAIT_LIMIT_MS) {
1639                    msec = WAIT_LIMIT_MS;
1640                }
1641                usleep(msec * 1000LL);
1642            }
1643        }
1644        // An offloaded track isn't flushed because the STREAM_END is reported
1645        // slightly prematurely to allow time for the gapless track switch
1646        // but this means that if we decide not to recycle the track there
1647        // could be a small amount of residual data still playing. We leave
1648        // AudioFlinger to drain the track.
1649
1650        mRecycledTrack.clear();
1651        close_l();
1652        delete mCallbackData;
1653        mCallbackData = NULL;
1654    }
1655}
1656
1657void MediaPlayerService::AudioOutput::close_l()
1658{
1659    mTrack.clear();
1660}
1661
1662status_t MediaPlayerService::AudioOutput::open(
1663        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1664        audio_format_t format, int bufferCount,
1665        AudioCallback cb, void *cookie,
1666        audio_output_flags_t flags,
1667        const audio_offload_info_t *offloadInfo,
1668        bool doNotReconnect,
1669        uint32_t suggestedFrameCount)
1670{
1671    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1672                format, bufferCount, mSessionId, flags);
1673
1674    // offloading is only supported in callback mode for now.
1675    // offloadInfo must be present if offload flag is set
1676    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1677            ((cb == NULL) || (offloadInfo == NULL))) {
1678        return BAD_VALUE;
1679    }
1680
1681    // compute frame count for the AudioTrack internal buffer
1682    size_t frameCount;
1683    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1684        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1685    } else {
1686        // try to estimate the buffer processing fetch size from AudioFlinger.
1687        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1688        uint32_t afSampleRate;
1689        size_t afFrameCount;
1690        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1691            return NO_INIT;
1692        }
1693        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1694            return NO_INIT;
1695        }
1696        const size_t framesPerBuffer =
1697                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1698
1699        if (bufferCount == 0) {
1700            // use suggestedFrameCount
1701            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1702        }
1703        // Check argument bufferCount against the mininum buffer count
1704        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1705            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1706            bufferCount = mMinBufferCount;
1707        }
1708        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1709        // which will be the minimum size permitted.
1710        frameCount = bufferCount * framesPerBuffer;
1711    }
1712
1713    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1714        channelMask = audio_channel_out_mask_from_count(channelCount);
1715        if (0 == channelMask) {
1716            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1717            return NO_INIT;
1718        }
1719    }
1720
1721    Mutex::Autolock lock(mLock);
1722    mCallback = cb;
1723    mCallbackCookie = cookie;
1724
1725    // Check whether we can recycle the track
1726    bool reuse = false;
1727    bool bothOffloaded = false;
1728
1729    if (mRecycledTrack != 0) {
1730        // check whether we are switching between two offloaded tracks
1731        bothOffloaded = (flags & mRecycledTrack->getFlags()
1732                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1733
1734        // check if the existing track can be reused as-is, or if a new track needs to be created.
1735        reuse = true;
1736
1737        if ((mCallbackData == NULL && mCallback != NULL) ||
1738                (mCallbackData != NULL && mCallback == NULL)) {
1739            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1740            ALOGV("can't chain callback and write");
1741            reuse = false;
1742        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1743                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1744            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1745                  mRecycledTrack->getSampleRate(), sampleRate,
1746                  mRecycledTrack->channelCount(), channelCount);
1747            reuse = false;
1748        } else if (flags != mFlags) {
1749            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1750            reuse = false;
1751        } else if (mRecycledTrack->format() != format) {
1752            reuse = false;
1753        }
1754    } else {
1755        ALOGV("no track available to recycle");
1756    }
1757
1758    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1759
1760    // If we can't recycle and both tracks are offloaded
1761    // we must close the previous output before opening a new one
1762    if (bothOffloaded && !reuse) {
1763        ALOGV("both offloaded and not recycling");
1764        deleteRecycledTrack_l();
1765    }
1766
1767    sp<AudioTrack> t;
1768    CallbackData *newcbd = NULL;
1769
1770    // We don't attempt to create a new track if we are recycling an
1771    // offloaded track. But, if we are recycling a non-offloaded or we
1772    // are switching where one is offloaded and one isn't then we create
1773    // the new track in advance so that we can read additional stream info
1774
1775    if (!(reuse && bothOffloaded)) {
1776        ALOGV("creating new AudioTrack");
1777
1778        if (mCallback != NULL) {
1779            newcbd = new CallbackData(this);
1780            t = new AudioTrack(
1781                    mStreamType,
1782                    sampleRate,
1783                    format,
1784                    channelMask,
1785                    frameCount,
1786                    flags,
1787                    CallbackWrapper,
1788                    newcbd,
1789                    0,  // notification frames
1790                    mSessionId,
1791                    AudioTrack::TRANSFER_CALLBACK,
1792                    offloadInfo,
1793                    mUid,
1794                    mPid,
1795                    mAttributes,
1796                    doNotReconnect);
1797        } else {
1798            // TODO: Due to buffer memory concerns, we use a max target playback speed
1799            // based on mPlaybackRate at the time of open (instead of kMaxRequiredSpeed),
1800            // also clamping the target speed to 1.0 <= targetSpeed <= kMaxRequiredSpeed.
1801            const float targetSpeed =
1802                    std::min(std::max(mPlaybackRate.mSpeed, 1.0f), kMaxRequiredSpeed);
1803            ALOGW_IF(targetSpeed != mPlaybackRate.mSpeed,
1804                    "track target speed:%f clamped from playback speed:%f",
1805                    targetSpeed, mPlaybackRate.mSpeed);
1806            t = new AudioTrack(
1807                    mStreamType,
1808                    sampleRate,
1809                    format,
1810                    channelMask,
1811                    frameCount,
1812                    flags,
1813                    NULL, // callback
1814                    NULL, // user data
1815                    0, // notification frames
1816                    mSessionId,
1817                    AudioTrack::TRANSFER_DEFAULT,
1818                    NULL, // offload info
1819                    mUid,
1820                    mPid,
1821                    mAttributes,
1822                    doNotReconnect,
1823                    targetSpeed);
1824        }
1825
1826        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1827            ALOGE("Unable to create audio track");
1828            delete newcbd;
1829            // t goes out of scope, so reference count drops to zero
1830            return NO_INIT;
1831        } else {
1832            // successful AudioTrack initialization implies a legacy stream type was generated
1833            // from the audio attributes
1834            mStreamType = t->streamType();
1835        }
1836    }
1837
1838    if (reuse) {
1839        CHECK(mRecycledTrack != NULL);
1840
1841        if (!bothOffloaded) {
1842            if (mRecycledTrack->frameCount() != t->frameCount()) {
1843                ALOGV("framecount differs: %zu/%zu frames",
1844                      mRecycledTrack->frameCount(), t->frameCount());
1845                reuse = false;
1846            }
1847        }
1848
1849        if (reuse) {
1850            ALOGV("chaining to next output and recycling track");
1851            close_l();
1852            mTrack = mRecycledTrack;
1853            mRecycledTrack.clear();
1854            if (mCallbackData != NULL) {
1855                mCallbackData->setOutput(this);
1856            }
1857            delete newcbd;
1858            return updateTrack();
1859        }
1860    }
1861
1862    // we're not going to reuse the track, unblock and flush it
1863    // this was done earlier if both tracks are offloaded
1864    if (!bothOffloaded) {
1865        deleteRecycledTrack_l();
1866    }
1867
1868    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1869
1870    mCallbackData = newcbd;
1871    ALOGV("setVolume");
1872    t->setVolume(mLeftVolume, mRightVolume);
1873
1874    mSampleRateHz = sampleRate;
1875    mFlags = flags;
1876    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1877    mFrameSize = t->frameSize();
1878    mTrack = t;
1879
1880    return updateTrack();
1881}
1882
1883status_t MediaPlayerService::AudioOutput::updateTrack() {
1884    if (mTrack == NULL) {
1885        return NO_ERROR;
1886    }
1887
1888    status_t res = NO_ERROR;
1889    // Note some output devices may give us a direct track even though we don't specify it.
1890    // Example: Line application b/17459982.
1891    if ((mTrack->getFlags()
1892            & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1893        res = mTrack->setPlaybackRate(mPlaybackRate);
1894        if (res == NO_ERROR) {
1895            mTrack->setAuxEffectSendLevel(mSendLevel);
1896            res = mTrack->attachAuxEffect(mAuxEffectId);
1897        }
1898    }
1899    ALOGV("updateTrack() DONE status %d", res);
1900    return res;
1901}
1902
1903status_t MediaPlayerService::AudioOutput::start()
1904{
1905    ALOGV("start");
1906    Mutex::Autolock lock(mLock);
1907    if (mCallbackData != NULL) {
1908        mCallbackData->endTrackSwitch();
1909    }
1910    if (mTrack != 0) {
1911        mTrack->setVolume(mLeftVolume, mRightVolume);
1912        mTrack->setAuxEffectSendLevel(mSendLevel);
1913        return mTrack->start();
1914    }
1915    return NO_INIT;
1916}
1917
1918void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1919    Mutex::Autolock lock(mLock);
1920    mNextOutput = nextOutput;
1921}
1922
1923void MediaPlayerService::AudioOutput::switchToNextOutput() {
1924    ALOGV("switchToNextOutput");
1925
1926    // Try to acquire the callback lock before moving track (without incurring deadlock).
1927    const unsigned kMaxSwitchTries = 100;
1928    Mutex::Autolock lock(mLock);
1929    for (unsigned tries = 0;;) {
1930        if (mTrack == 0) {
1931            return;
1932        }
1933        if (mNextOutput != NULL && mNextOutput != this) {
1934            if (mCallbackData != NULL) {
1935                // two alternative approaches
1936#if 1
1937                CallbackData *callbackData = mCallbackData;
1938                mLock.unlock();
1939                // proper acquisition sequence
1940                callbackData->lock();
1941                mLock.lock();
1942                // Caution: it is unlikely that someone deleted our callback or changed our target
1943                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1944                    // fatal if we are starved out.
1945                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1946                            "switchToNextOutput() cannot obtain correct lock sequence");
1947                    callbackData->unlock();
1948                    continue;
1949                }
1950                callbackData->mSwitching = true; // begin track switch
1951                callbackData->setOutput(NULL);
1952#else
1953                // tryBeginTrackSwitch() returns false if the callback has the lock.
1954                if (!mCallbackData->tryBeginTrackSwitch()) {
1955                    // fatal if we are starved out.
1956                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1957                            "switchToNextOutput() cannot obtain callback lock");
1958                    mLock.unlock();
1959                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1960                    mLock.lock();
1961                    continue;
1962                }
1963#endif
1964            }
1965
1966            Mutex::Autolock nextLock(mNextOutput->mLock);
1967
1968            // If the next output track is not NULL, then it has been
1969            // opened already for playback.
1970            // This is possible even without the next player being started,
1971            // for example, the next player could be prepared and seeked.
1972            //
1973            // Presuming it isn't advisable to force the track over.
1974             if (mNextOutput->mTrack == NULL) {
1975                ALOGD("Recycling track for gapless playback");
1976                delete mNextOutput->mCallbackData;
1977                mNextOutput->mCallbackData = mCallbackData;
1978                mNextOutput->mRecycledTrack = mTrack;
1979                mNextOutput->mSampleRateHz = mSampleRateHz;
1980                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1981                mNextOutput->mFlags = mFlags;
1982                mNextOutput->mFrameSize = mFrameSize;
1983                close_l();
1984                mCallbackData = NULL;  // destruction handled by mNextOutput
1985            } else {
1986                ALOGW("Ignoring gapless playback because next player has already started");
1987                // remove track in case resource needed for future players.
1988                if (mCallbackData != NULL) {
1989                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1990                }
1991                close_l();
1992            }
1993        }
1994        break;
1995    }
1996}
1997
1998ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1999{
2000    Mutex::Autolock lock(mLock);
2001    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
2002
2003    //ALOGV("write(%p, %u)", buffer, size);
2004    if (mTrack != 0) {
2005        return mTrack->write(buffer, size, blocking);
2006    }
2007    return NO_INIT;
2008}
2009
2010void MediaPlayerService::AudioOutput::stop()
2011{
2012    ALOGV("stop");
2013    Mutex::Autolock lock(mLock);
2014    if (mTrack != 0) mTrack->stop();
2015}
2016
2017void MediaPlayerService::AudioOutput::flush()
2018{
2019    ALOGV("flush");
2020    Mutex::Autolock lock(mLock);
2021    if (mTrack != 0) mTrack->flush();
2022}
2023
2024void MediaPlayerService::AudioOutput::pause()
2025{
2026    ALOGV("pause");
2027    Mutex::Autolock lock(mLock);
2028    if (mTrack != 0) mTrack->pause();
2029}
2030
2031void MediaPlayerService::AudioOutput::close()
2032{
2033    ALOGV("close");
2034    sp<AudioTrack> track;
2035    {
2036        Mutex::Autolock lock(mLock);
2037        track = mTrack;
2038        close_l(); // clears mTrack
2039    }
2040    // destruction of the track occurs outside of mutex.
2041}
2042
2043void MediaPlayerService::AudioOutput::setVolume(float left, float right)
2044{
2045    ALOGV("setVolume(%f, %f)", left, right);
2046    Mutex::Autolock lock(mLock);
2047    mLeftVolume = left;
2048    mRightVolume = right;
2049    if (mTrack != 0) {
2050        mTrack->setVolume(left, right);
2051    }
2052}
2053
2054status_t MediaPlayerService::AudioOutput::setPlaybackRate(const AudioPlaybackRate &rate)
2055{
2056    ALOGV("setPlaybackRate(%f %f %d %d)",
2057                rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
2058    Mutex::Autolock lock(mLock);
2059    if (mTrack == 0) {
2060        // remember rate so that we can set it when the track is opened
2061        mPlaybackRate = rate;
2062        return OK;
2063    }
2064    status_t res = mTrack->setPlaybackRate(rate);
2065    if (res != NO_ERROR) {
2066        return res;
2067    }
2068    // rate.mSpeed is always greater than 0 if setPlaybackRate succeeded
2069    CHECK_GT(rate.mSpeed, 0.f);
2070    mPlaybackRate = rate;
2071    if (mSampleRateHz != 0) {
2072        mMsecsPerFrame = 1E3f / (rate.mSpeed * mSampleRateHz);
2073    }
2074    return res;
2075}
2076
2077status_t MediaPlayerService::AudioOutput::getPlaybackRate(AudioPlaybackRate *rate)
2078{
2079    ALOGV("setPlaybackRate");
2080    Mutex::Autolock lock(mLock);
2081    if (mTrack == 0) {
2082        return NO_INIT;
2083    }
2084    *rate = mTrack->getPlaybackRate();
2085    return NO_ERROR;
2086}
2087
2088status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
2089{
2090    ALOGV("setAuxEffectSendLevel(%f)", level);
2091    Mutex::Autolock lock(mLock);
2092    mSendLevel = level;
2093    if (mTrack != 0) {
2094        return mTrack->setAuxEffectSendLevel(level);
2095    }
2096    return NO_ERROR;
2097}
2098
2099status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
2100{
2101    ALOGV("attachAuxEffect(%d)", effectId);
2102    Mutex::Autolock lock(mLock);
2103    mAuxEffectId = effectId;
2104    if (mTrack != 0) {
2105        return mTrack->attachAuxEffect(effectId);
2106    }
2107    return NO_ERROR;
2108}
2109
2110// static
2111void MediaPlayerService::AudioOutput::CallbackWrapper(
2112        int event, void *cookie, void *info) {
2113    //ALOGV("callbackwrapper");
2114    CallbackData *data = (CallbackData*)cookie;
2115    // lock to ensure we aren't caught in the middle of a track switch.
2116    data->lock();
2117    AudioOutput *me = data->getOutput();
2118    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
2119    if (me == NULL) {
2120        // no output set, likely because the track was scheduled to be reused
2121        // by another player, but the format turned out to be incompatible.
2122        data->unlock();
2123        if (buffer != NULL) {
2124            buffer->size = 0;
2125        }
2126        return;
2127    }
2128
2129    switch(event) {
2130    case AudioTrack::EVENT_MORE_DATA: {
2131        size_t actualSize = (*me->mCallback)(
2132                me, buffer->raw, buffer->size, me->mCallbackCookie,
2133                CB_EVENT_FILL_BUFFER);
2134
2135        // Log when no data is returned from the callback.
2136        // (1) We may have no data (especially with network streaming sources).
2137        // (2) We may have reached the EOS and the audio track is not stopped yet.
2138        // Note that AwesomePlayer/AudioPlayer will only return zero size when it reaches the EOS.
2139        // NuPlayerRenderer will return zero when it doesn't have data (it doesn't block to fill).
2140        //
2141        // This is a benign busy-wait, with the next data request generated 10 ms or more later;
2142        // nevertheless for power reasons, we don't want to see too many of these.
2143
2144        ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
2145
2146        buffer->size = actualSize;
2147        } break;
2148
2149    case AudioTrack::EVENT_STREAM_END:
2150        // currently only occurs for offloaded callbacks
2151        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
2152        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
2153                me->mCallbackCookie, CB_EVENT_STREAM_END);
2154        break;
2155
2156    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
2157        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
2158        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
2159                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
2160        break;
2161
2162    case AudioTrack::EVENT_UNDERRUN:
2163        // This occurs when there is no data available, typically
2164        // when there is a failure to supply data to the AudioTrack.  It can also
2165        // occur in non-offloaded mode when the audio device comes out of standby.
2166        //
2167        // If an AudioTrack underruns it outputs silence. Since this happens suddenly
2168        // it may sound like an audible pop or glitch.
2169        //
2170        // The underrun event is sent once per track underrun; the condition is reset
2171        // when more data is sent to the AudioTrack.
2172        ALOGD("callbackwrapper: EVENT_UNDERRUN (discarded)");
2173        break;
2174
2175    default:
2176        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
2177    }
2178
2179    data->unlock();
2180}
2181
2182audio_session_t MediaPlayerService::AudioOutput::getSessionId() const
2183{
2184    Mutex::Autolock lock(mLock);
2185    return mSessionId;
2186}
2187
2188uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
2189{
2190    Mutex::Autolock lock(mLock);
2191    if (mTrack == 0) return 0;
2192    return mTrack->getSampleRate();
2193}
2194
2195int64_t MediaPlayerService::AudioOutput::getBufferDurationInUs() const
2196{
2197    Mutex::Autolock lock(mLock);
2198    if (mTrack == 0) {
2199        return 0;
2200    }
2201    int64_t duration;
2202    if (mTrack->getBufferDurationInUs(&duration) != OK) {
2203        return 0;
2204    }
2205    return duration;
2206}
2207
2208////////////////////////////////////////////////////////////////////////////////
2209
2210struct CallbackThread : public Thread {
2211    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
2212                   MediaPlayerBase::AudioSink::AudioCallback cb,
2213                   void *cookie);
2214
2215protected:
2216    virtual ~CallbackThread();
2217
2218    virtual bool threadLoop();
2219
2220private:
2221    wp<MediaPlayerBase::AudioSink> mSink;
2222    MediaPlayerBase::AudioSink::AudioCallback mCallback;
2223    void *mCookie;
2224    void *mBuffer;
2225    size_t mBufferSize;
2226
2227    CallbackThread(const CallbackThread &);
2228    CallbackThread &operator=(const CallbackThread &);
2229};
2230
2231CallbackThread::CallbackThread(
2232        const wp<MediaPlayerBase::AudioSink> &sink,
2233        MediaPlayerBase::AudioSink::AudioCallback cb,
2234        void *cookie)
2235    : mSink(sink),
2236      mCallback(cb),
2237      mCookie(cookie),
2238      mBuffer(NULL),
2239      mBufferSize(0) {
2240}
2241
2242CallbackThread::~CallbackThread() {
2243    if (mBuffer) {
2244        free(mBuffer);
2245        mBuffer = NULL;
2246    }
2247}
2248
2249bool CallbackThread::threadLoop() {
2250    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
2251    if (sink == NULL) {
2252        return false;
2253    }
2254
2255    if (mBuffer == NULL) {
2256        mBufferSize = sink->bufferSize();
2257        mBuffer = malloc(mBufferSize);
2258    }
2259
2260    size_t actualSize =
2261        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
2262                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
2263
2264    if (actualSize > 0) {
2265        sink->write(mBuffer, actualSize);
2266        // Could return false on sink->write() error or short count.
2267        // Not necessarily appropriate but would work for AudioCache behavior.
2268    }
2269
2270    return true;
2271}
2272
2273////////////////////////////////////////////////////////////////////////////////
2274
2275void MediaPlayerService::addBatteryData(uint32_t params)
2276{
2277    Mutex::Autolock lock(mLock);
2278
2279    int32_t time = systemTime() / 1000000L;
2280
2281    // change audio output devices. This notification comes from AudioFlinger
2282    if ((params & kBatteryDataSpeakerOn)
2283            || (params & kBatteryDataOtherAudioDeviceOn)) {
2284
2285        int deviceOn[NUM_AUDIO_DEVICES];
2286        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2287            deviceOn[i] = 0;
2288        }
2289
2290        if ((params & kBatteryDataSpeakerOn)
2291                && (params & kBatteryDataOtherAudioDeviceOn)) {
2292            deviceOn[SPEAKER_AND_OTHER] = 1;
2293        } else if (params & kBatteryDataSpeakerOn) {
2294            deviceOn[SPEAKER] = 1;
2295        } else {
2296            deviceOn[OTHER_AUDIO_DEVICE] = 1;
2297        }
2298
2299        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2300            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
2301
2302                if (mBatteryAudio.refCount > 0) { // if playing audio
2303                    if (!deviceOn[i]) {
2304                        mBatteryAudio.lastTime[i] += time;
2305                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2306                        mBatteryAudio.lastTime[i] = 0;
2307                    } else {
2308                        mBatteryAudio.lastTime[i] = 0 - time;
2309                    }
2310                }
2311
2312                mBatteryAudio.deviceOn[i] = deviceOn[i];
2313            }
2314        }
2315        return;
2316    }
2317
2318    // an audio stream is started
2319    if (params & kBatteryDataAudioFlingerStart) {
2320        // record the start time only if currently no other audio
2321        // is being played
2322        if (mBatteryAudio.refCount == 0) {
2323            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2324                if (mBatteryAudio.deviceOn[i]) {
2325                    mBatteryAudio.lastTime[i] -= time;
2326                }
2327            }
2328        }
2329
2330        mBatteryAudio.refCount ++;
2331        return;
2332
2333    } else if (params & kBatteryDataAudioFlingerStop) {
2334        if (mBatteryAudio.refCount <= 0) {
2335            ALOGW("Battery track warning: refCount is <= 0");
2336            return;
2337        }
2338
2339        // record the stop time only if currently this is the only
2340        // audio being played
2341        if (mBatteryAudio.refCount == 1) {
2342            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2343                if (mBatteryAudio.deviceOn[i]) {
2344                    mBatteryAudio.lastTime[i] += time;
2345                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2346                    mBatteryAudio.lastTime[i] = 0;
2347                }
2348            }
2349        }
2350
2351        mBatteryAudio.refCount --;
2352        return;
2353    }
2354
2355    int uid = IPCThreadState::self()->getCallingUid();
2356    if (uid == AID_MEDIA) {
2357        return;
2358    }
2359    int index = mBatteryData.indexOfKey(uid);
2360
2361    if (index < 0) { // create a new entry for this UID
2362        BatteryUsageInfo info;
2363        info.audioTotalTime = 0;
2364        info.videoTotalTime = 0;
2365        info.audioLastTime = 0;
2366        info.videoLastTime = 0;
2367        info.refCount = 0;
2368
2369        if (mBatteryData.add(uid, info) == NO_MEMORY) {
2370            ALOGE("Battery track error: no memory for new app");
2371            return;
2372        }
2373    }
2374
2375    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
2376
2377    if (params & kBatteryDataCodecStarted) {
2378        if (params & kBatteryDataTrackAudio) {
2379            info.audioLastTime -= time;
2380            info.refCount ++;
2381        }
2382        if (params & kBatteryDataTrackVideo) {
2383            info.videoLastTime -= time;
2384            info.refCount ++;
2385        }
2386    } else {
2387        if (info.refCount == 0) {
2388            ALOGW("Battery track warning: refCount is already 0");
2389            return;
2390        } else if (info.refCount < 0) {
2391            ALOGE("Battery track error: refCount < 0");
2392            mBatteryData.removeItem(uid);
2393            return;
2394        }
2395
2396        if (params & kBatteryDataTrackAudio) {
2397            info.audioLastTime += time;
2398            info.refCount --;
2399        }
2400        if (params & kBatteryDataTrackVideo) {
2401            info.videoLastTime += time;
2402            info.refCount --;
2403        }
2404
2405        // no stream is being played by this UID
2406        if (info.refCount == 0) {
2407            info.audioTotalTime += info.audioLastTime;
2408            info.audioLastTime = 0;
2409            info.videoTotalTime += info.videoLastTime;
2410            info.videoLastTime = 0;
2411        }
2412    }
2413}
2414
2415status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2416    Mutex::Autolock lock(mLock);
2417
2418    // audio output devices usage
2419    int32_t time = systemTime() / 1000000L; //in ms
2420    int32_t totalTime;
2421
2422    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2423        totalTime = mBatteryAudio.totalTime[i];
2424
2425        if (mBatteryAudio.deviceOn[i]
2426            && (mBatteryAudio.lastTime[i] != 0)) {
2427                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2428                totalTime += tmpTime;
2429        }
2430
2431        reply->writeInt32(totalTime);
2432        // reset the total time
2433        mBatteryAudio.totalTime[i] = 0;
2434   }
2435
2436    // codec usage
2437    BatteryUsageInfo info;
2438    int size = mBatteryData.size();
2439
2440    reply->writeInt32(size);
2441    int i = 0;
2442
2443    while (i < size) {
2444        info = mBatteryData.valueAt(i);
2445
2446        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2447        reply->writeInt32(info.audioTotalTime);
2448        reply->writeInt32(info.videoTotalTime);
2449
2450        info.audioTotalTime = 0;
2451        info.videoTotalTime = 0;
2452
2453        // remove the UID entry where no stream is being played
2454        if (info.refCount <= 0) {
2455            mBatteryData.removeItemsAt(i);
2456            size --;
2457            i --;
2458        }
2459        i++;
2460    }
2461    return NO_ERROR;
2462}
2463} // namespace android
2464