MediaPlayerService.cpp revision 308f3927dee3861586c17df267265ae0c86d79f7 
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/IBatteryStats.h>
38#include <binder/IPCThreadState.h>
39#include <binder/IServiceManager.h>
40#include <binder/MemoryHeapBase.h>
41#include <binder/MemoryBase.h>
42#include <gui/Surface.h>
43#include <utils/Errors.h>  // for status_t
44#include <utils/String8.h>
45#include <utils/SystemClock.h>
46#include <utils/Timers.h>
47#include <utils/Vector.h>
48
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/AudioPlayer.h>
61#include <media/stagefright/foundation/ADebug.h>
62#include <media/stagefright/foundation/ALooperRoster.h>
63
64#include <system/audio.h>
65
66#include <private/android_filesystem_config.h>
67
68#include "ActivityManager.h"
69#include "MediaRecorderClient.h"
70#include "MediaPlayerService.h"
71#include "MetadataRetrieverClient.h"
72#include "MediaPlayerFactory.h"
73
74#include "TestPlayerStub.h"
75#include "StagefrightPlayer.h"
76#include "nuplayer/NuPlayerDriver.h"
77
78#include <OMX.h>
79
80#include "Crypto.h"
81#include "Drm.h"
82#include "HDCP.h"
83#include "HTTPBase.h"
84#include "RemoteDisplay.h"
85
86namespace {
87using android::media::Metadata;
88using android::status_t;
89using android::OK;
90using android::BAD_VALUE;
91using android::NOT_ENOUGH_DATA;
92using android::Parcel;
93
94// Max number of entries in the filter.
95const int kMaxFilterSize = 64;  // I pulled that out of thin air.
96
97// FIXME: Move all the metadata related function in the Metadata.cpp
98
99
100// Unmarshall a filter from a Parcel.
101// Filter format in a parcel:
102//
103//  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
104// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
105// |                       number of entries (n)                   |
106// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
107// |                       metadata type 1                         |
108// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
109// |                       metadata type 2                         |
110// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
111//  ....
112// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
113// |                       metadata type n                         |
114// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
115//
116// @param p Parcel that should start with a filter.
117// @param[out] filter On exit contains the list of metadata type to be
118//                    filtered.
119// @param[out] status On exit contains the status code to be returned.
120// @return true if the parcel starts with a valid filter.
121bool unmarshallFilter(const Parcel& p,
122                      Metadata::Filter *filter,
123                      status_t *status)
124{
125    int32_t val;
126    if (p.readInt32(&val) != OK)
127    {
128        ALOGE("Failed to read filter's length");
129        *status = NOT_ENOUGH_DATA;
130        return false;
131    }
132
133    if( val > kMaxFilterSize || val < 0)
134    {
135        ALOGE("Invalid filter len %d", val);
136        *status = BAD_VALUE;
137        return false;
138    }
139
140    const size_t num = val;
141
142    filter->clear();
143    filter->setCapacity(num);
144
145    size_t size = num * sizeof(Metadata::Type);
146
147
148    if (p.dataAvail() < size)
149    {
150        ALOGE("Filter too short expected %d but got %d", size, p.dataAvail());
151        *status = NOT_ENOUGH_DATA;
152        return false;
153    }
154
155    const Metadata::Type *data =
156            static_cast<const Metadata::Type*>(p.readInplace(size));
157
158    if (NULL == data)
159    {
160        ALOGE("Filter had no data");
161        *status = BAD_VALUE;
162        return false;
163    }
164
165    // TODO: The stl impl of vector would be more efficient here
166    // because it degenerates into a memcpy on pod types. Try to
167    // replace later or use stl::set.
168    for (size_t i = 0; i < num; ++i)
169    {
170        filter->add(*data);
171        ++data;
172    }
173    *status = OK;
174    return true;
175}
176
177// @param filter Of metadata type.
178// @param val To be searched.
179// @return true if a match was found.
180bool findMetadata(const Metadata::Filter& filter, const int32_t val)
181{
182    // Deal with empty and ANY right away
183    if (filter.isEmpty()) return false;
184    if (filter[0] == Metadata::kAny) return true;
185
186    return filter.indexOf(val) >= 0;
187}
188
189}  // anonymous namespace
190
191
192namespace {
193using android::Parcel;
194using android::String16;
195
196// marshalling tag indicating flattened utf16 tags
197// keep in sync with frameworks/base/media/java/android/media/AudioAttributes.java
198const int32_t kAudioAttributesMarshallTagFlattenTags = 1;
199
200// Audio attributes format in a parcel:
201//
202//  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
203// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
204// |                       usage                                   |
205// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
206// |                       content_type                            |
207// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
208// |                       source                                  |
209// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
210// |                       flags                                   |
211// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
212// |                       kAudioAttributesMarshallTagFlattenTags  | // ignore tags if not found
213// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
214// |                       flattened tags in UTF16                 |
215// |                         ...                                   |
216// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
217//
218// @param p Parcel that contains audio attributes.
219// @param[out] attributes On exit points to an initialized audio_attributes_t structure
220// @param[out] status On exit contains the status code to be returned.
221void unmarshallAudioAttributes(const Parcel& parcel, audio_attributes_t *attributes)
222{
223    attributes->usage = (audio_usage_t) parcel.readInt32();
224    attributes->content_type = (audio_content_type_t) parcel.readInt32();
225    attributes->source = (audio_source_t) parcel.readInt32();
226    attributes->flags = (audio_flags_mask_t) parcel.readInt32();
227    const bool hasFlattenedTag = (parcel.readInt32() == kAudioAttributesMarshallTagFlattenTags);
228    if (hasFlattenedTag) {
229        // the tags are UTF16, convert to UTF8
230        String16 tags = parcel.readString16();
231        ssize_t realTagSize = utf16_to_utf8_length(tags.string(), tags.size());
232        if (realTagSize <= 0) {
233            strcpy(attributes->tags, "");
234        } else {
235            // copy the flattened string into the attributes as the destination for the conversion:
236            // copying array size -1, array for tags was calloc'd, no need to NULL-terminate it
237            size_t tagSize = realTagSize > AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 ?
238                    AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 : realTagSize;
239            utf16_to_utf8(tags.string(), tagSize, attributes->tags);
240        }
241    } else {
242        ALOGE("unmarshallAudioAttributes() received unflattened tags, ignoring tag values");
243        strcpy(attributes->tags, "");
244    }
245}
246} // anonymous namespace
247
248
249namespace android {
250
251extern ALooperRoster gLooperRoster;
252
253
254static bool checkPermission(const char* permissionString) {
255    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
256    bool ok = checkCallingPermission(String16(permissionString));
257    if (!ok) ALOGE("Request requires %s", permissionString);
258    return ok;
259}
260
261// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
262/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
263/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
264
265void MediaPlayerService::instantiate() {
266    defaultServiceManager()->addService(
267            String16("media.player"), new MediaPlayerService());
268}
269
270MediaPlayerService::MediaPlayerService()
271{
272    ALOGV("MediaPlayerService created");
273    mNextConnId = 1;
274
275    mBatteryAudio.refCount = 0;
276    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
277        mBatteryAudio.deviceOn[i] = 0;
278        mBatteryAudio.lastTime[i] = 0;
279        mBatteryAudio.totalTime[i] = 0;
280    }
281    // speaker is on by default
282    mBatteryAudio.deviceOn[SPEAKER] = 1;
283
284    // reset battery stats
285    // if the mediaserver has crashed, battery stats could be left
286    // in bad state, reset the state upon service start.
287    const sp<IServiceManager> sm(defaultServiceManager());
288    if (sm != NULL) {
289        const String16 name("batterystats");
290        sp<IBatteryStats> batteryStats =
291                interface_cast<IBatteryStats>(sm->getService(name));
292        if (batteryStats != NULL) {
293            batteryStats->noteResetVideo();
294            batteryStats->noteResetAudio();
295        }
296    }
297
298    MediaPlayerFactory::registerBuiltinFactories();
299}
300
301MediaPlayerService::~MediaPlayerService()
302{
303    ALOGV("MediaPlayerService destroyed");
304}
305
306sp<IMediaRecorder> MediaPlayerService::createMediaRecorder()
307{
308    pid_t pid = IPCThreadState::self()->getCallingPid();
309    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
310    wp<MediaRecorderClient> w = recorder;
311    Mutex::Autolock lock(mLock);
312    mMediaRecorderClients.add(w);
313    ALOGV("Create new media recorder client from pid %d", pid);
314    return recorder;
315}
316
317void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
318{
319    Mutex::Autolock lock(mLock);
320    mMediaRecorderClients.remove(client);
321    ALOGV("Delete media recorder client");
322}
323
324sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
325{
326    pid_t pid = IPCThreadState::self()->getCallingPid();
327    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
328    ALOGV("Create new media retriever from pid %d", pid);
329    return retriever;
330}
331
332sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
333        int audioSessionId)
334{
335    pid_t pid = IPCThreadState::self()->getCallingPid();
336    int32_t connId = android_atomic_inc(&mNextConnId);
337
338    sp<Client> c = new Client(
339            this, pid, connId, client, audioSessionId,
340            IPCThreadState::self()->getCallingUid());
341
342    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
343         IPCThreadState::self()->getCallingUid());
344
345    wp<Client> w = c;
346    {
347        Mutex::Autolock lock(mLock);
348        mClients.add(w);
349    }
350    return c;
351}
352
353sp<IMediaCodecList> MediaPlayerService::getCodecList() const {
354    return MediaCodecList::getLocalInstance();
355}
356
357sp<IOMX> MediaPlayerService::getOMX() {
358    Mutex::Autolock autoLock(mLock);
359
360    if (mOMX.get() == NULL) {
361        mOMX = new OMX;
362    }
363
364    return mOMX;
365}
366
367sp<ICrypto> MediaPlayerService::makeCrypto() {
368    return new Crypto;
369}
370
371sp<IDrm> MediaPlayerService::makeDrm() {
372    return new Drm;
373}
374
375sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
376    return new HDCP(createEncryptionModule);
377}
378
379sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
380        const sp<IRemoteDisplayClient>& client, const String8& iface) {
381    if (!checkPermission("android.permission.CONTROL_WIFI_DISPLAY")) {
382        return NULL;
383    }
384
385    return new RemoteDisplay(client, iface.string());
386}
387
388status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
389{
390    const size_t SIZE = 256;
391    char buffer[SIZE];
392    String8 result;
393
394    result.append(" AudioOutput\n");
395    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
396            mStreamType, mLeftVolume, mRightVolume);
397    result.append(buffer);
398    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
399            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
400    result.append(buffer);
401    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
402            mAuxEffectId, mSendLevel);
403    result.append(buffer);
404
405    ::write(fd, result.string(), result.size());
406    if (mTrack != 0) {
407        mTrack->dump(fd, args);
408    }
409    return NO_ERROR;
410}
411
412status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
413{
414    const size_t SIZE = 256;
415    char buffer[SIZE];
416    String8 result;
417    result.append(" Client\n");
418    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
419            mPid, mConnId, mStatus, mLoop?"true": "false");
420    result.append(buffer);
421    write(fd, result.string(), result.size());
422    if (mPlayer != NULL) {
423        mPlayer->dump(fd, args);
424    }
425    if (mAudioOutput != 0) {
426        mAudioOutput->dump(fd, args);
427    }
428    write(fd, "\n", 1);
429    return NO_ERROR;
430}
431
432/**
433 * The only arguments this understands right now are -c, -von and -voff,
434 * which are parsed by ALooperRoster::dump()
435 */
436status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
437{
438    const size_t SIZE = 256;
439    char buffer[SIZE];
440    String8 result;
441    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
442        snprintf(buffer, SIZE, "Permission Denial: "
443                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
444                IPCThreadState::self()->getCallingPid(),
445                IPCThreadState::self()->getCallingUid());
446        result.append(buffer);
447    } else {
448        Mutex::Autolock lock(mLock);
449        for (int i = 0, n = mClients.size(); i < n; ++i) {
450            sp<Client> c = mClients[i].promote();
451            if (c != 0) c->dump(fd, args);
452        }
453        if (mMediaRecorderClients.size() == 0) {
454                result.append(" No media recorder client\n\n");
455        } else {
456            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
457                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
458                if (c != 0) {
459                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
460                    result.append(buffer);
461                    write(fd, result.string(), result.size());
462                    result = "\n";
463                    c->dump(fd, args);
464                }
465            }
466        }
467
468        result.append(" Files opened and/or mapped:\n");
469        snprintf(buffer, SIZE, "/proc/%d/maps", getpid());
470        FILE *f = fopen(buffer, "r");
471        if (f) {
472            while (!feof(f)) {
473                fgets(buffer, SIZE, f);
474                if (strstr(buffer, " /storage/") ||
475                    strstr(buffer, " /system/sounds/") ||
476                    strstr(buffer, " /data/") ||
477                    strstr(buffer, " /system/media/")) {
478                    result.append("  ");
479                    result.append(buffer);
480                }
481            }
482            fclose(f);
483        } else {
484            result.append("couldn't open ");
485            result.append(buffer);
486            result.append("\n");
487        }
488
489        snprintf(buffer, SIZE, "/proc/%d/fd", getpid());
490        DIR *d = opendir(buffer);
491        if (d) {
492            struct dirent *ent;
493            while((ent = readdir(d)) != NULL) {
494                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
495                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", getpid(), ent->d_name);
496                    struct stat s;
497                    if (lstat(buffer, &s) == 0) {
498                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
499                            char linkto[256];
500                            int len = readlink(buffer, linkto, sizeof(linkto));
501                            if(len > 0) {
502                                if(len > 255) {
503                                    linkto[252] = '.';
504                                    linkto[253] = '.';
505                                    linkto[254] = '.';
506                                    linkto[255] = 0;
507                                } else {
508                                    linkto[len] = 0;
509                                }
510                                if (strstr(linkto, "/storage/") == linkto ||
511                                    strstr(linkto, "/system/sounds/") == linkto ||
512                                    strstr(linkto, "/data/") == linkto ||
513                                    strstr(linkto, "/system/media/") == linkto) {
514                                    result.append("  ");
515                                    result.append(buffer);
516                                    result.append(" -> ");
517                                    result.append(linkto);
518                                    result.append("\n");
519                                }
520                            }
521                        } else {
522                            result.append("  unexpected type for ");
523                            result.append(buffer);
524                            result.append("\n");
525                        }
526                    }
527                }
528            }
529            closedir(d);
530        } else {
531            result.append("couldn't open ");
532            result.append(buffer);
533            result.append("\n");
534        }
535
536        gLooperRoster.dump(fd, args);
537
538        bool dumpMem = false;
539        for (size_t i = 0; i < args.size(); i++) {
540            if (args[i] == String16("-m")) {
541                dumpMem = true;
542            }
543        }
544        if (dumpMem) {
545            dumpMemoryAddresses(fd);
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        int 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);
634    }
635
636    if (p != NULL) {
637        p->setUID(mUID);
638    }
639
640    return p;
641}
642
643sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
644        player_type playerType)
645{
646    ALOGV("player type = %d", playerType);
647
648    // create the right type of player
649    sp<MediaPlayerBase> p = createPlayer(playerType);
650    if (p == NULL) {
651        return p;
652    }
653
654    if (!p->hardwareOutput()) {
655        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
656                mPid, mAudioAttributes);
657        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
658    }
659
660    return p;
661}
662
663void MediaPlayerService::Client::setDataSource_post(
664        const sp<MediaPlayerBase>& p,
665        status_t status)
666{
667    ALOGV(" setDataSource");
668    mStatus = status;
669    if (mStatus != OK) {
670        ALOGE("  error: %d", mStatus);
671        return;
672    }
673
674    // Set the re-transmission endpoint if one was chosen.
675    if (mRetransmitEndpointValid) {
676        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
677        if (mStatus != NO_ERROR) {
678            ALOGE("setRetransmitEndpoint error: %d", mStatus);
679        }
680    }
681
682    if (mStatus == OK) {
683        mPlayer = p;
684    }
685}
686
687status_t MediaPlayerService::Client::setDataSource(
688        const sp<IMediaHTTPService> &httpService,
689        const char *url,
690        const KeyedVector<String8, String8> *headers)
691{
692    ALOGV("setDataSource(%s)", url);
693    if (url == NULL)
694        return UNKNOWN_ERROR;
695
696    if ((strncmp(url, "http://", 7) == 0) ||
697        (strncmp(url, "https://", 8) == 0) ||
698        (strncmp(url, "rtsp://", 7) == 0)) {
699        if (!checkPermission("android.permission.INTERNET")) {
700            return PERMISSION_DENIED;
701        }
702    }
703
704    if (strncmp(url, "content://", 10) == 0) {
705        // get a filedescriptor for the content Uri and
706        // pass it to the setDataSource(fd) method
707
708        String16 url16(url);
709        int fd = android::openContentProviderFile(url16);
710        if (fd < 0)
711        {
712            ALOGE("Couldn't open fd for %s", url);
713            return UNKNOWN_ERROR;
714        }
715        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
716        close(fd);
717        return mStatus;
718    } else {
719        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
720        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
721        if (p == NULL) {
722            return NO_INIT;
723        }
724
725        setDataSource_post(p, p->setDataSource(httpService, url, headers));
726        return mStatus;
727    }
728}
729
730status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
731{
732    ALOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
733    struct stat sb;
734    int ret = fstat(fd, &sb);
735    if (ret != 0) {
736        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
737        return UNKNOWN_ERROR;
738    }
739
740    ALOGV("st_dev  = %llu", sb.st_dev);
741    ALOGV("st_mode = %u", sb.st_mode);
742    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
743    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
744    ALOGV("st_size = %llu", sb.st_size);
745
746    if (offset >= sb.st_size) {
747        ALOGE("offset error");
748        return UNKNOWN_ERROR;
749    }
750    if (offset + length > sb.st_size) {
751        length = sb.st_size - offset;
752        ALOGV("calculated length = %lld", length);
753    }
754
755    player_type playerType = MediaPlayerFactory::getPlayerType(this,
756                                                               fd,
757                                                               offset,
758                                                               length);
759    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
760    if (p == NULL) {
761        return NO_INIT;
762    }
763
764    // now set data source
765    setDataSource_post(p, p->setDataSource(fd, offset, length));
766    return mStatus;
767}
768
769status_t MediaPlayerService::Client::setDataSource(
770        const sp<IStreamSource> &source) {
771    // create the right type of player
772    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
773    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
774    if (p == NULL) {
775        return NO_INIT;
776    }
777
778    // now set data source
779    setDataSource_post(p, p->setDataSource(source));
780    return mStatus;
781}
782
783void MediaPlayerService::Client::disconnectNativeWindow() {
784    if (mConnectedWindow != NULL) {
785        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
786                NATIVE_WINDOW_API_MEDIA);
787
788        if (err != OK) {
789            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
790                    strerror(-err), err);
791        }
792    }
793    mConnectedWindow.clear();
794}
795
796status_t MediaPlayerService::Client::setVideoSurfaceTexture(
797        const sp<IGraphicBufferProducer>& bufferProducer)
798{
799    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
800    sp<MediaPlayerBase> p = getPlayer();
801    if (p == 0) return UNKNOWN_ERROR;
802
803    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
804    if (mConnectedWindowBinder == binder) {
805        return OK;
806    }
807
808    sp<ANativeWindow> anw;
809    if (bufferProducer != NULL) {
810        anw = new Surface(bufferProducer, true /* controlledByApp */);
811        status_t err = native_window_api_connect(anw.get(),
812                NATIVE_WINDOW_API_MEDIA);
813
814        if (err != OK) {
815            ALOGE("setVideoSurfaceTexture failed: %d", err);
816            // Note that we must do the reset before disconnecting from the ANW.
817            // Otherwise queue/dequeue calls could be made on the disconnected
818            // ANW, which may result in errors.
819            reset();
820
821            disconnectNativeWindow();
822
823            return err;
824        }
825    }
826
827    // Note that we must set the player's new GraphicBufferProducer before
828    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
829    // on the disconnected ANW, which may result in errors.
830    status_t err = p->setVideoSurfaceTexture(bufferProducer);
831
832    disconnectNativeWindow();
833
834    mConnectedWindow = anw;
835
836    if (err == OK) {
837        mConnectedWindowBinder = binder;
838    } else {
839        disconnectNativeWindow();
840    }
841
842    return err;
843}
844
845status_t MediaPlayerService::Client::invoke(const Parcel& request,
846                                            Parcel *reply)
847{
848    sp<MediaPlayerBase> p = getPlayer();
849    if (p == NULL) return UNKNOWN_ERROR;
850    return p->invoke(request, reply);
851}
852
853// This call doesn't need to access the native player.
854status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
855{
856    status_t status;
857    media::Metadata::Filter allow, drop;
858
859    if (unmarshallFilter(filter, &allow, &status) &&
860        unmarshallFilter(filter, &drop, &status)) {
861        Mutex::Autolock lock(mLock);
862
863        mMetadataAllow = allow;
864        mMetadataDrop = drop;
865    }
866    return status;
867}
868
869status_t MediaPlayerService::Client::getMetadata(
870        bool update_only, bool /*apply_filter*/, Parcel *reply)
871{
872    sp<MediaPlayerBase> player = getPlayer();
873    if (player == 0) return UNKNOWN_ERROR;
874
875    status_t status;
876    // Placeholder for the return code, updated by the caller.
877    reply->writeInt32(-1);
878
879    media::Metadata::Filter ids;
880
881    // We don't block notifications while we fetch the data. We clear
882    // mMetadataUpdated first so we don't lose notifications happening
883    // during the rest of this call.
884    {
885        Mutex::Autolock lock(mLock);
886        if (update_only) {
887            ids = mMetadataUpdated;
888        }
889        mMetadataUpdated.clear();
890    }
891
892    media::Metadata metadata(reply);
893
894    metadata.appendHeader();
895    status = player->getMetadata(ids, reply);
896
897    if (status != OK) {
898        metadata.resetParcel();
899        ALOGE("getMetadata failed %d", status);
900        return status;
901    }
902
903    // FIXME: Implement filtering on the result. Not critical since
904    // filtering takes place on the update notifications already. This
905    // would be when all the metadata are fetch and a filter is set.
906
907    // Everything is fine, update the metadata length.
908    metadata.updateLength();
909    return OK;
910}
911
912status_t MediaPlayerService::Client::prepareAsync()
913{
914    ALOGV("[%d] prepareAsync", mConnId);
915    sp<MediaPlayerBase> p = getPlayer();
916    if (p == 0) return UNKNOWN_ERROR;
917    status_t ret = p->prepareAsync();
918#if CALLBACK_ANTAGONIZER
919    ALOGD("start Antagonizer");
920    if (ret == NO_ERROR) mAntagonizer->start();
921#endif
922    return ret;
923}
924
925status_t MediaPlayerService::Client::start()
926{
927    ALOGV("[%d] start", mConnId);
928    sp<MediaPlayerBase> p = getPlayer();
929    if (p == 0) return UNKNOWN_ERROR;
930    p->setLooping(mLoop);
931    return p->start();
932}
933
934status_t MediaPlayerService::Client::stop()
935{
936    ALOGV("[%d] stop", mConnId);
937    sp<MediaPlayerBase> p = getPlayer();
938    if (p == 0) return UNKNOWN_ERROR;
939    return p->stop();
940}
941
942status_t MediaPlayerService::Client::pause()
943{
944    ALOGV("[%d] pause", mConnId);
945    sp<MediaPlayerBase> p = getPlayer();
946    if (p == 0) return UNKNOWN_ERROR;
947    return p->pause();
948}
949
950status_t MediaPlayerService::Client::isPlaying(bool* state)
951{
952    *state = false;
953    sp<MediaPlayerBase> p = getPlayer();
954    if (p == 0) return UNKNOWN_ERROR;
955    *state = p->isPlaying();
956    ALOGV("[%d] isPlaying: %d", mConnId, *state);
957    return NO_ERROR;
958}
959
960status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
961{
962    ALOGV("getCurrentPosition");
963    sp<MediaPlayerBase> p = getPlayer();
964    if (p == 0) return UNKNOWN_ERROR;
965    status_t ret = p->getCurrentPosition(msec);
966    if (ret == NO_ERROR) {
967        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
968    } else {
969        ALOGE("getCurrentPosition returned %d", ret);
970    }
971    return ret;
972}
973
974status_t MediaPlayerService::Client::getDuration(int *msec)
975{
976    ALOGV("getDuration");
977    sp<MediaPlayerBase> p = getPlayer();
978    if (p == 0) return UNKNOWN_ERROR;
979    status_t ret = p->getDuration(msec);
980    if (ret == NO_ERROR) {
981        ALOGV("[%d] getDuration = %d", mConnId, *msec);
982    } else {
983        ALOGE("getDuration returned %d", ret);
984    }
985    return ret;
986}
987
988status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
989    ALOGV("setNextPlayer");
990    Mutex::Autolock l(mLock);
991    sp<Client> c = static_cast<Client*>(player.get());
992    mNextClient = c;
993
994    if (c != NULL) {
995        if (mAudioOutput != NULL) {
996            mAudioOutput->setNextOutput(c->mAudioOutput);
997        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
998            ALOGE("no current audio output");
999        }
1000
1001        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1002            mPlayer->setNextPlayer(mNextClient->getPlayer());
1003        }
1004    }
1005
1006    return OK;
1007}
1008
1009status_t MediaPlayerService::Client::seekTo(int msec)
1010{
1011    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1012    sp<MediaPlayerBase> p = getPlayer();
1013    if (p == 0) return UNKNOWN_ERROR;
1014    return p->seekTo(msec);
1015}
1016
1017status_t MediaPlayerService::Client::reset()
1018{
1019    ALOGV("[%d] reset", mConnId);
1020    mRetransmitEndpointValid = false;
1021    sp<MediaPlayerBase> p = getPlayer();
1022    if (p == 0) return UNKNOWN_ERROR;
1023    return p->reset();
1024}
1025
1026status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1027{
1028    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1029    // TODO: for hardware output, call player instead
1030    Mutex::Autolock l(mLock);
1031    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1032    return NO_ERROR;
1033}
1034
1035status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1036{
1037    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1038    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1039    unmarshallAudioAttributes(parcel, mAudioAttributes);
1040
1041    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1042            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1043            mAudioAttributes->tags);
1044
1045    if (mAudioOutput != 0) {
1046        mAudioOutput->setAudioAttributes(mAudioAttributes);
1047    }
1048    return NO_ERROR;
1049}
1050
1051status_t MediaPlayerService::Client::setLooping(int loop)
1052{
1053    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1054    mLoop = loop;
1055    sp<MediaPlayerBase> p = getPlayer();
1056    if (p != 0) return p->setLooping(loop);
1057    return NO_ERROR;
1058}
1059
1060status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1061{
1062    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1063
1064    // for hardware output, call player instead
1065    sp<MediaPlayerBase> p = getPlayer();
1066    {
1067      Mutex::Autolock l(mLock);
1068      if (p != 0 && p->hardwareOutput()) {
1069          MediaPlayerHWInterface* hwp =
1070                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1071          return hwp->setVolume(leftVolume, rightVolume);
1072      } else {
1073          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1074          return NO_ERROR;
1075      }
1076    }
1077
1078    return NO_ERROR;
1079}
1080
1081status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1082{
1083    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1084    Mutex::Autolock l(mLock);
1085    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1086    return NO_ERROR;
1087}
1088
1089status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1090{
1091    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1092    Mutex::Autolock l(mLock);
1093    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1094    return NO_ERROR;
1095}
1096
1097status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1098    ALOGV("[%d] setParameter(%d)", mConnId, key);
1099    switch (key) {
1100    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1101    {
1102        Mutex::Autolock l(mLock);
1103        return setAudioAttributes_l(request);
1104    }
1105    default:
1106        sp<MediaPlayerBase> p = getPlayer();
1107        if (p == 0) { return UNKNOWN_ERROR; }
1108        return p->setParameter(key, request);
1109    }
1110}
1111
1112status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1113    ALOGV("[%d] getParameter(%d)", mConnId, key);
1114    sp<MediaPlayerBase> p = getPlayer();
1115    if (p == 0) return UNKNOWN_ERROR;
1116    return p->getParameter(key, reply);
1117}
1118
1119status_t MediaPlayerService::Client::setRetransmitEndpoint(
1120        const struct sockaddr_in* endpoint) {
1121
1122    if (NULL != endpoint) {
1123        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1124        uint16_t p = ntohs(endpoint->sin_port);
1125        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1126                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1127    } else {
1128        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1129    }
1130
1131    sp<MediaPlayerBase> p = getPlayer();
1132
1133    // Right now, the only valid time to set a retransmit endpoint is before
1134    // player selection has been made (since the presence or absence of a
1135    // retransmit endpoint is going to determine which player is selected during
1136    // setDataSource).
1137    if (p != 0) return INVALID_OPERATION;
1138
1139    if (NULL != endpoint) {
1140        mRetransmitEndpoint = *endpoint;
1141        mRetransmitEndpointValid = true;
1142    } else {
1143        mRetransmitEndpointValid = false;
1144    }
1145
1146    return NO_ERROR;
1147}
1148
1149status_t MediaPlayerService::Client::getRetransmitEndpoint(
1150        struct sockaddr_in* endpoint)
1151{
1152    if (NULL == endpoint)
1153        return BAD_VALUE;
1154
1155    sp<MediaPlayerBase> p = getPlayer();
1156
1157    if (p != NULL)
1158        return p->getRetransmitEndpoint(endpoint);
1159
1160    if (!mRetransmitEndpointValid)
1161        return NO_INIT;
1162
1163    *endpoint = mRetransmitEndpoint;
1164
1165    return NO_ERROR;
1166}
1167
1168void MediaPlayerService::Client::notify(
1169        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1170{
1171    Client* client = static_cast<Client*>(cookie);
1172    if (client == NULL) {
1173        return;
1174    }
1175
1176    sp<IMediaPlayerClient> c;
1177    {
1178        Mutex::Autolock l(client->mLock);
1179        c = client->mClient;
1180        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1181            if (client->mAudioOutput != NULL)
1182                client->mAudioOutput->switchToNextOutput();
1183            client->mNextClient->start();
1184            client->mNextClient->mClient->notify(MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1185        }
1186    }
1187
1188    if (MEDIA_INFO == msg &&
1189        MEDIA_INFO_METADATA_UPDATE == ext1) {
1190        const media::Metadata::Type metadata_type = ext2;
1191
1192        if(client->shouldDropMetadata(metadata_type)) {
1193            return;
1194        }
1195
1196        // Update the list of metadata that have changed. getMetadata
1197        // also access mMetadataUpdated and clears it.
1198        client->addNewMetadataUpdate(metadata_type);
1199    }
1200
1201    if (c != NULL) {
1202        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1203        c->notify(msg, ext1, ext2, obj);
1204    }
1205}
1206
1207
1208bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1209{
1210    Mutex::Autolock lock(mLock);
1211
1212    if (findMetadata(mMetadataDrop, code)) {
1213        return true;
1214    }
1215
1216    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1217        return false;
1218    } else {
1219        return true;
1220    }
1221}
1222
1223
1224void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1225    Mutex::Autolock lock(mLock);
1226    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1227        mMetadataUpdated.add(metadata_type);
1228    }
1229}
1230
1231#if CALLBACK_ANTAGONIZER
1232const int Antagonizer::interval = 10000; // 10 msecs
1233
1234Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1235    mExit(false), mActive(false), mClient(client), mCb(cb)
1236{
1237    createThread(callbackThread, this);
1238}
1239
1240void Antagonizer::kill()
1241{
1242    Mutex::Autolock _l(mLock);
1243    mActive = false;
1244    mExit = true;
1245    mCondition.wait(mLock);
1246}
1247
1248int Antagonizer::callbackThread(void* user)
1249{
1250    ALOGD("Antagonizer started");
1251    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1252    while (!p->mExit) {
1253        if (p->mActive) {
1254            ALOGV("send event");
1255            p->mCb(p->mClient, 0, 0, 0);
1256        }
1257        usleep(interval);
1258    }
1259    Mutex::Autolock _l(p->mLock);
1260    p->mCondition.signal();
1261    ALOGD("Antagonizer stopped");
1262    return 0;
1263}
1264#endif
1265
1266#undef LOG_TAG
1267#define LOG_TAG "AudioSink"
1268MediaPlayerService::AudioOutput::AudioOutput(int sessionId, int uid, int pid,
1269        const audio_attributes_t* attr)
1270    : mCallback(NULL),
1271      mCallbackCookie(NULL),
1272      mCallbackData(NULL),
1273      mBytesWritten(0),
1274      mSessionId(sessionId),
1275      mUid(uid),
1276      mPid(pid),
1277      mFlags(AUDIO_OUTPUT_FLAG_NONE) {
1278    ALOGV("AudioOutput(%d)", sessionId);
1279    mStreamType = AUDIO_STREAM_MUSIC;
1280    mLeftVolume = 1.0;
1281    mRightVolume = 1.0;
1282    mPlaybackRatePermille = 1000;
1283    mSampleRateHz = 0;
1284    mMsecsPerFrame = 0;
1285    mAuxEffectId = 0;
1286    mSendLevel = 0.0;
1287    setMinBufferCount();
1288    mAttributes = attr;
1289}
1290
1291MediaPlayerService::AudioOutput::~AudioOutput()
1292{
1293    close();
1294    delete mCallbackData;
1295}
1296
1297void MediaPlayerService::AudioOutput::setMinBufferCount()
1298{
1299    char value[PROPERTY_VALUE_MAX];
1300    if (property_get("ro.kernel.qemu", value, 0)) {
1301        mIsOnEmulator = true;
1302        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1303    }
1304}
1305
1306bool MediaPlayerService::AudioOutput::isOnEmulator()
1307{
1308    setMinBufferCount();
1309    return mIsOnEmulator;
1310}
1311
1312int MediaPlayerService::AudioOutput::getMinBufferCount()
1313{
1314    setMinBufferCount();
1315    return mMinBufferCount;
1316}
1317
1318ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1319{
1320    if (mTrack == 0) return NO_INIT;
1321    return mTrack->frameCount() * frameSize();
1322}
1323
1324ssize_t MediaPlayerService::AudioOutput::frameCount() const
1325{
1326    if (mTrack == 0) return NO_INIT;
1327    return mTrack->frameCount();
1328}
1329
1330ssize_t MediaPlayerService::AudioOutput::channelCount() const
1331{
1332    if (mTrack == 0) return NO_INIT;
1333    return mTrack->channelCount();
1334}
1335
1336ssize_t MediaPlayerService::AudioOutput::frameSize() const
1337{
1338    if (mTrack == 0) return NO_INIT;
1339    return mTrack->frameSize();
1340}
1341
1342uint32_t MediaPlayerService::AudioOutput::latency () const
1343{
1344    if (mTrack == 0) return 0;
1345    return mTrack->latency();
1346}
1347
1348float MediaPlayerService::AudioOutput::msecsPerFrame() const
1349{
1350    return mMsecsPerFrame;
1351}
1352
1353status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1354{
1355    if (mTrack == 0) return NO_INIT;
1356    return mTrack->getPosition(position);
1357}
1358
1359status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1360{
1361    if (mTrack == 0) return NO_INIT;
1362    return mTrack->getTimestamp(ts);
1363}
1364
1365status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1366{
1367    if (mTrack == 0) return NO_INIT;
1368    *frameswritten = mBytesWritten / frameSize();
1369    return OK;
1370}
1371
1372status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1373{
1374    if (mTrack == 0) return NO_INIT;
1375    return mTrack->setParameters(keyValuePairs);
1376}
1377
1378String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1379{
1380    if (mTrack == 0) return String8::empty();
1381    return mTrack->getParameters(keys);
1382}
1383
1384void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1385    mAttributes = attributes;
1386}
1387
1388void MediaPlayerService::AudioOutput::deleteRecycledTrack()
1389{
1390    ALOGV("deleteRecycledTrack");
1391
1392    if (mRecycledTrack != 0) {
1393
1394        if (mCallbackData != NULL) {
1395            mCallbackData->setOutput(NULL);
1396            mCallbackData->endTrackSwitch();
1397        }
1398
1399        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1400            mRecycledTrack->flush();
1401        }
1402        // An offloaded track isn't flushed because the STREAM_END is reported
1403        // slightly prematurely to allow time for the gapless track switch
1404        // but this means that if we decide not to recycle the track there
1405        // could be a small amount of residual data still playing. We leave
1406        // AudioFlinger to drain the track.
1407
1408        mRecycledTrack.clear();
1409        delete mCallbackData;
1410        mCallbackData = NULL;
1411        close();
1412    }
1413}
1414
1415status_t MediaPlayerService::AudioOutput::open(
1416        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1417        audio_format_t format, int bufferCount,
1418        AudioCallback cb, void *cookie,
1419        audio_output_flags_t flags,
1420        const audio_offload_info_t *offloadInfo)
1421{
1422    mCallback = cb;
1423    mCallbackCookie = cookie;
1424
1425    // Check argument "bufferCount" against the mininum buffer count
1426    if (bufferCount < mMinBufferCount) {
1427        ALOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1428        bufferCount = mMinBufferCount;
1429
1430    }
1431    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1432                format, bufferCount, mSessionId, flags);
1433    uint32_t afSampleRate;
1434    size_t afFrameCount;
1435    size_t frameCount;
1436
1437    // offloading is only supported in callback mode for now.
1438    // offloadInfo must be present if offload flag is set
1439    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1440            ((cb == NULL) || (offloadInfo == NULL))) {
1441        return BAD_VALUE;
1442    }
1443
1444    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1445        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1446    } else {
1447        uint32_t afSampleRate;
1448        size_t afFrameCount;
1449
1450        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1451            return NO_INIT;
1452        }
1453        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1454            return NO_INIT;
1455        }
1456
1457        frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1458    }
1459
1460    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1461        channelMask = audio_channel_out_mask_from_count(channelCount);
1462        if (0 == channelMask) {
1463            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1464            return NO_INIT;
1465        }
1466    }
1467
1468    // Check whether we can recycle the track
1469    bool reuse = false;
1470    bool bothOffloaded = false;
1471
1472    if (mRecycledTrack != 0) {
1473        // check whether we are switching between two offloaded tracks
1474        bothOffloaded = (flags & mRecycledTrack->getFlags()
1475                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1476
1477        // check if the existing track can be reused as-is, or if a new track needs to be created.
1478        reuse = true;
1479
1480        if ((mCallbackData == NULL && mCallback != NULL) ||
1481                (mCallbackData != NULL && mCallback == NULL)) {
1482            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1483            ALOGV("can't chain callback and write");
1484            reuse = false;
1485        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1486                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1487            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1488                  mRecycledTrack->getSampleRate(), sampleRate,
1489                  mRecycledTrack->channelCount(), channelCount);
1490            reuse = false;
1491        } else if (flags != mFlags) {
1492            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1493            reuse = false;
1494        } else if (mRecycledTrack->format() != format) {
1495            reuse = false;
1496        }
1497    } else {
1498        ALOGV("no track available to recycle");
1499    }
1500
1501    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1502
1503    // If we can't recycle and both tracks are offloaded
1504    // we must close the previous output before opening a new one
1505    if (bothOffloaded && !reuse) {
1506        ALOGV("both offloaded and not recycling");
1507        deleteRecycledTrack();
1508    }
1509
1510    sp<AudioTrack> t;
1511    CallbackData *newcbd = NULL;
1512
1513    // We don't attempt to create a new track if we are recycling an
1514    // offloaded track. But, if we are recycling a non-offloaded or we
1515    // are switching where one is offloaded and one isn't then we create
1516    // the new track in advance so that we can read additional stream info
1517
1518    if (!(reuse && bothOffloaded)) {
1519        ALOGV("creating new AudioTrack");
1520
1521        if (mCallback != NULL) {
1522            newcbd = new CallbackData(this);
1523            t = new AudioTrack(
1524                    mStreamType,
1525                    sampleRate,
1526                    format,
1527                    channelMask,
1528                    frameCount,
1529                    flags,
1530                    CallbackWrapper,
1531                    newcbd,
1532                    0,  // notification frames
1533                    mSessionId,
1534                    AudioTrack::TRANSFER_CALLBACK,
1535                    offloadInfo,
1536                    mUid,
1537                    mPid,
1538                    mAttributes);
1539        } else {
1540            t = new AudioTrack(
1541                    mStreamType,
1542                    sampleRate,
1543                    format,
1544                    channelMask,
1545                    frameCount,
1546                    flags,
1547                    NULL, // callback
1548                    NULL, // user data
1549                    0, // notification frames
1550                    mSessionId,
1551                    AudioTrack::TRANSFER_DEFAULT,
1552                    NULL, // offload info
1553                    mUid,
1554                    mPid,
1555                    mAttributes);
1556        }
1557
1558        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1559            ALOGE("Unable to create audio track");
1560            delete newcbd;
1561            return NO_INIT;
1562        } else {
1563            // successful AudioTrack initialization implies a legacy stream type was generated
1564            // from the audio attributes
1565            mStreamType = t->streamType();
1566        }
1567    }
1568
1569    if (reuse) {
1570        CHECK(mRecycledTrack != NULL);
1571
1572        if (!bothOffloaded) {
1573            if (mRecycledTrack->frameCount() != t->frameCount()) {
1574                ALOGV("framecount differs: %u/%u frames",
1575                      mRecycledTrack->frameCount(), t->frameCount());
1576                reuse = false;
1577            }
1578        }
1579
1580        if (reuse) {
1581            ALOGV("chaining to next output and recycling track");
1582            close();
1583            mTrack = mRecycledTrack;
1584            mRecycledTrack.clear();
1585            if (mCallbackData != NULL) {
1586                mCallbackData->setOutput(this);
1587            }
1588            delete newcbd;
1589            return OK;
1590        }
1591    }
1592
1593    // we're not going to reuse the track, unblock and flush it
1594    // this was done earlier if both tracks are offloaded
1595    if (!bothOffloaded) {
1596        deleteRecycledTrack();
1597    }
1598
1599    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1600
1601    mCallbackData = newcbd;
1602    ALOGV("setVolume");
1603    t->setVolume(mLeftVolume, mRightVolume);
1604
1605    mSampleRateHz = sampleRate;
1606    mFlags = flags;
1607    mMsecsPerFrame = mPlaybackRatePermille / (float) sampleRate;
1608    uint32_t pos;
1609    if (t->getPosition(&pos) == OK) {
1610        mBytesWritten = uint64_t(pos) * t->frameSize();
1611    }
1612    mTrack = t;
1613
1614    status_t res = NO_ERROR;
1615    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1616        res = t->setSampleRate(mPlaybackRatePermille * mSampleRateHz / 1000);
1617        if (res == NO_ERROR) {
1618            t->setAuxEffectSendLevel(mSendLevel);
1619            res = t->attachAuxEffect(mAuxEffectId);
1620        }
1621    }
1622    ALOGV("open() DONE status %d", res);
1623    return res;
1624}
1625
1626status_t MediaPlayerService::AudioOutput::start()
1627{
1628    ALOGV("start");
1629    if (mCallbackData != NULL) {
1630        mCallbackData->endTrackSwitch();
1631    }
1632    if (mTrack != 0) {
1633        mTrack->setVolume(mLeftVolume, mRightVolume);
1634        mTrack->setAuxEffectSendLevel(mSendLevel);
1635        return mTrack->start();
1636    }
1637    return NO_INIT;
1638}
1639
1640void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1641    mNextOutput = nextOutput;
1642}
1643
1644
1645void MediaPlayerService::AudioOutput::switchToNextOutput() {
1646    ALOGV("switchToNextOutput");
1647    if (mNextOutput != NULL) {
1648        if (mCallbackData != NULL) {
1649            mCallbackData->beginTrackSwitch();
1650        }
1651        delete mNextOutput->mCallbackData;
1652        mNextOutput->mCallbackData = mCallbackData;
1653        mCallbackData = NULL;
1654        mNextOutput->mRecycledTrack = mTrack;
1655        mTrack.clear();
1656        mNextOutput->mSampleRateHz = mSampleRateHz;
1657        mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1658        mNextOutput->mBytesWritten = mBytesWritten;
1659        mNextOutput->mFlags = mFlags;
1660    }
1661}
1662
1663ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1664{
1665    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1666
1667    //ALOGV("write(%p, %u)", buffer, size);
1668    if (mTrack != 0) {
1669        ssize_t ret = mTrack->write(buffer, size);
1670        if (ret >= 0) {
1671            mBytesWritten += ret;
1672        }
1673        return ret;
1674    }
1675    return NO_INIT;
1676}
1677
1678void MediaPlayerService::AudioOutput::stop()
1679{
1680    ALOGV("stop");
1681    if (mTrack != 0) mTrack->stop();
1682}
1683
1684void MediaPlayerService::AudioOutput::flush()
1685{
1686    ALOGV("flush");
1687    if (mTrack != 0) mTrack->flush();
1688}
1689
1690void MediaPlayerService::AudioOutput::pause()
1691{
1692    ALOGV("pause");
1693    if (mTrack != 0) mTrack->pause();
1694}
1695
1696void MediaPlayerService::AudioOutput::close()
1697{
1698    ALOGV("close");
1699    mTrack.clear();
1700}
1701
1702void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1703{
1704    ALOGV("setVolume(%f, %f)", left, right);
1705    mLeftVolume = left;
1706    mRightVolume = right;
1707    if (mTrack != 0) {
1708        mTrack->setVolume(left, right);
1709    }
1710}
1711
1712status_t MediaPlayerService::AudioOutput::setPlaybackRatePermille(int32_t ratePermille)
1713{
1714    ALOGV("setPlaybackRatePermille(%d)", ratePermille);
1715    status_t res = NO_ERROR;
1716    if (mTrack != 0) {
1717        res = mTrack->setSampleRate(ratePermille * mSampleRateHz / 1000);
1718    } else {
1719        res = NO_INIT;
1720    }
1721    mPlaybackRatePermille = ratePermille;
1722    if (mSampleRateHz != 0) {
1723        mMsecsPerFrame = mPlaybackRatePermille / (float) mSampleRateHz;
1724    }
1725    return res;
1726}
1727
1728status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
1729{
1730    ALOGV("setAuxEffectSendLevel(%f)", level);
1731    mSendLevel = level;
1732    if (mTrack != 0) {
1733        return mTrack->setAuxEffectSendLevel(level);
1734    }
1735    return NO_ERROR;
1736}
1737
1738status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
1739{
1740    ALOGV("attachAuxEffect(%d)", effectId);
1741    mAuxEffectId = effectId;
1742    if (mTrack != 0) {
1743        return mTrack->attachAuxEffect(effectId);
1744    }
1745    return NO_ERROR;
1746}
1747
1748// static
1749void MediaPlayerService::AudioOutput::CallbackWrapper(
1750        int event, void *cookie, void *info) {
1751    //ALOGV("callbackwrapper");
1752    CallbackData *data = (CallbackData*)cookie;
1753    data->lock();
1754    AudioOutput *me = data->getOutput();
1755    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1756    if (me == NULL) {
1757        // no output set, likely because the track was scheduled to be reused
1758        // by another player, but the format turned out to be incompatible.
1759        data->unlock();
1760        if (buffer != NULL) {
1761            buffer->size = 0;
1762        }
1763        return;
1764    }
1765
1766    switch(event) {
1767    case AudioTrack::EVENT_MORE_DATA: {
1768        size_t actualSize = (*me->mCallback)(
1769                me, buffer->raw, buffer->size, me->mCallbackCookie,
1770                CB_EVENT_FILL_BUFFER);
1771
1772        if ((me->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0 &&
1773            actualSize == 0 && buffer->size > 0 && me->mNextOutput == NULL) {
1774            // We've reached EOS but the audio track is not stopped yet,
1775            // keep playing silence.
1776
1777            memset(buffer->raw, 0, buffer->size);
1778            actualSize = buffer->size;
1779        }
1780
1781        buffer->size = actualSize;
1782        } break;
1783
1784
1785    case AudioTrack::EVENT_STREAM_END:
1786        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
1787        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
1788                me->mCallbackCookie, CB_EVENT_STREAM_END);
1789        break;
1790
1791    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
1792        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
1793        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
1794                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
1795        break;
1796
1797    default:
1798        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
1799    }
1800
1801    data->unlock();
1802}
1803
1804int MediaPlayerService::AudioOutput::getSessionId() const
1805{
1806    return mSessionId;
1807}
1808
1809uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
1810{
1811    if (mTrack == 0) return 0;
1812    return mTrack->getSampleRate();
1813}
1814
1815////////////////////////////////////////////////////////////////////////////////
1816
1817struct CallbackThread : public Thread {
1818    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
1819                   MediaPlayerBase::AudioSink::AudioCallback cb,
1820                   void *cookie);
1821
1822protected:
1823    virtual ~CallbackThread();
1824
1825    virtual bool threadLoop();
1826
1827private:
1828    wp<MediaPlayerBase::AudioSink> mSink;
1829    MediaPlayerBase::AudioSink::AudioCallback mCallback;
1830    void *mCookie;
1831    void *mBuffer;
1832    size_t mBufferSize;
1833
1834    CallbackThread(const CallbackThread &);
1835    CallbackThread &operator=(const CallbackThread &);
1836};
1837
1838CallbackThread::CallbackThread(
1839        const wp<MediaPlayerBase::AudioSink> &sink,
1840        MediaPlayerBase::AudioSink::AudioCallback cb,
1841        void *cookie)
1842    : mSink(sink),
1843      mCallback(cb),
1844      mCookie(cookie),
1845      mBuffer(NULL),
1846      mBufferSize(0) {
1847}
1848
1849CallbackThread::~CallbackThread() {
1850    if (mBuffer) {
1851        free(mBuffer);
1852        mBuffer = NULL;
1853    }
1854}
1855
1856bool CallbackThread::threadLoop() {
1857    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
1858    if (sink == NULL) {
1859        return false;
1860    }
1861
1862    if (mBuffer == NULL) {
1863        mBufferSize = sink->bufferSize();
1864        mBuffer = malloc(mBufferSize);
1865    }
1866
1867    size_t actualSize =
1868        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
1869                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
1870
1871    if (actualSize > 0) {
1872        sink->write(mBuffer, actualSize);
1873        // Could return false on sink->write() error or short count.
1874        // Not necessarily appropriate but would work for AudioCache behavior.
1875    }
1876
1877    return true;
1878}
1879
1880////////////////////////////////////////////////////////////////////////////////
1881
1882void MediaPlayerService::addBatteryData(uint32_t params)
1883{
1884    Mutex::Autolock lock(mLock);
1885
1886    int32_t time = systemTime() / 1000000L;
1887
1888    // change audio output devices. This notification comes from AudioFlinger
1889    if ((params & kBatteryDataSpeakerOn)
1890            || (params & kBatteryDataOtherAudioDeviceOn)) {
1891
1892        int deviceOn[NUM_AUDIO_DEVICES];
1893        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
1894            deviceOn[i] = 0;
1895        }
1896
1897        if ((params & kBatteryDataSpeakerOn)
1898                && (params & kBatteryDataOtherAudioDeviceOn)) {
1899            deviceOn[SPEAKER_AND_OTHER] = 1;
1900        } else if (params & kBatteryDataSpeakerOn) {
1901            deviceOn[SPEAKER] = 1;
1902        } else {
1903            deviceOn[OTHER_AUDIO_DEVICE] = 1;
1904        }
1905
1906        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
1907            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
1908
1909                if (mBatteryAudio.refCount > 0) { // if playing audio
1910                    if (!deviceOn[i]) {
1911                        mBatteryAudio.lastTime[i] += time;
1912                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
1913                        mBatteryAudio.lastTime[i] = 0;
1914                    } else {
1915                        mBatteryAudio.lastTime[i] = 0 - time;
1916                    }
1917                }
1918
1919                mBatteryAudio.deviceOn[i] = deviceOn[i];
1920            }
1921        }
1922        return;
1923    }
1924
1925    // an audio stream is started
1926    if (params & kBatteryDataAudioFlingerStart) {
1927        // record the start time only if currently no other audio
1928        // is being played
1929        if (mBatteryAudio.refCount == 0) {
1930            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
1931                if (mBatteryAudio.deviceOn[i]) {
1932                    mBatteryAudio.lastTime[i] -= time;
1933                }
1934            }
1935        }
1936
1937        mBatteryAudio.refCount ++;
1938        return;
1939
1940    } else if (params & kBatteryDataAudioFlingerStop) {
1941        if (mBatteryAudio.refCount <= 0) {
1942            ALOGW("Battery track warning: refCount is <= 0");
1943            return;
1944        }
1945
1946        // record the stop time only if currently this is the only
1947        // audio being played
1948        if (mBatteryAudio.refCount == 1) {
1949            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
1950                if (mBatteryAudio.deviceOn[i]) {
1951                    mBatteryAudio.lastTime[i] += time;
1952                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
1953                    mBatteryAudio.lastTime[i] = 0;
1954                }
1955            }
1956        }
1957
1958        mBatteryAudio.refCount --;
1959        return;
1960    }
1961
1962    int uid = IPCThreadState::self()->getCallingUid();
1963    if (uid == AID_MEDIA) {
1964        return;
1965    }
1966    int index = mBatteryData.indexOfKey(uid);
1967
1968    if (index < 0) { // create a new entry for this UID
1969        BatteryUsageInfo info;
1970        info.audioTotalTime = 0;
1971        info.videoTotalTime = 0;
1972        info.audioLastTime = 0;
1973        info.videoLastTime = 0;
1974        info.refCount = 0;
1975
1976        if (mBatteryData.add(uid, info) == NO_MEMORY) {
1977            ALOGE("Battery track error: no memory for new app");
1978            return;
1979        }
1980    }
1981
1982    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
1983
1984    if (params & kBatteryDataCodecStarted) {
1985        if (params & kBatteryDataTrackAudio) {
1986            info.audioLastTime -= time;
1987            info.refCount ++;
1988        }
1989        if (params & kBatteryDataTrackVideo) {
1990            info.videoLastTime -= time;
1991            info.refCount ++;
1992        }
1993    } else {
1994        if (info.refCount == 0) {
1995            ALOGW("Battery track warning: refCount is already 0");
1996            return;
1997        } else if (info.refCount < 0) {
1998            ALOGE("Battery track error: refCount < 0");
1999            mBatteryData.removeItem(uid);
2000            return;
2001        }
2002
2003        if (params & kBatteryDataTrackAudio) {
2004            info.audioLastTime += time;
2005            info.refCount --;
2006        }
2007        if (params & kBatteryDataTrackVideo) {
2008            info.videoLastTime += time;
2009            info.refCount --;
2010        }
2011
2012        // no stream is being played by this UID
2013        if (info.refCount == 0) {
2014            info.audioTotalTime += info.audioLastTime;
2015            info.audioLastTime = 0;
2016            info.videoTotalTime += info.videoLastTime;
2017            info.videoLastTime = 0;
2018        }
2019    }
2020}
2021
2022status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2023    Mutex::Autolock lock(mLock);
2024
2025    // audio output devices usage
2026    int32_t time = systemTime() / 1000000L; //in ms
2027    int32_t totalTime;
2028
2029    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2030        totalTime = mBatteryAudio.totalTime[i];
2031
2032        if (mBatteryAudio.deviceOn[i]
2033            && (mBatteryAudio.lastTime[i] != 0)) {
2034                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2035                totalTime += tmpTime;
2036        }
2037
2038        reply->writeInt32(totalTime);
2039        // reset the total time
2040        mBatteryAudio.totalTime[i] = 0;
2041   }
2042
2043    // codec usage
2044    BatteryUsageInfo info;
2045    int size = mBatteryData.size();
2046
2047    reply->writeInt32(size);
2048    int i = 0;
2049
2050    while (i < size) {
2051        info = mBatteryData.valueAt(i);
2052
2053        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2054        reply->writeInt32(info.audioTotalTime);
2055        reply->writeInt32(info.videoTotalTime);
2056
2057        info.audioTotalTime = 0;
2058        info.videoTotalTime = 0;
2059
2060        // remove the UID entry where no stream is being played
2061        if (info.refCount <= 0) {
2062            mBatteryData.removeItemsAt(i);
2063            size --;
2064            i --;
2065        }
2066        i++;
2067    }
2068    return NO_ERROR;
2069}
2070} // namespace android
2071