MediaPlayerService.cpp revision 4356269be6d2b62bbb945364e8fc4beb99e1aada 
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/AudioPlayer.h>
61#include <media/stagefright/foundation/ADebug.h>
62#include <media/stagefright/foundation/ALooperRoster.h>
63#include <mediautils/BatteryNotifier.h>
64
65#include <system/audio.h>
66
67#include <private/android_filesystem_config.h>
68
69#include "ActivityManager.h"
70#include "MediaRecorderClient.h"
71#include "MediaPlayerService.h"
72#include "MetadataRetrieverClient.h"
73#include "MediaPlayerFactory.h"
74
75#include "TestPlayerStub.h"
76#include "StagefrightPlayer.h"
77#include "nuplayer/NuPlayerDriver.h"
78
79#include <OMX.h>
80
81#include "Crypto.h"
82#include "Drm.h"
83#include "HDCP.h"
84#include "HTTPBase.h"
85#include "RemoteDisplay.h"
86
87namespace {
88using android::media::Metadata;
89using android::status_t;
90using android::OK;
91using android::BAD_VALUE;
92using android::NOT_ENOUGH_DATA;
93using android::Parcel;
94
95// Max number of entries in the filter.
96const int kMaxFilterSize = 64;  // I pulled that out of thin air.
97
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 %d but got %d", size, p.dataAvail());
152        *status = NOT_ENOUGH_DATA;
153        return false;
154    }
155
156    const Metadata::Type *data =
157            static_cast<const Metadata::Type*>(p.readInplace(size));
158
159    if (NULL == data)
160    {
161        ALOGE("Filter had no data");
162        *status = BAD_VALUE;
163        return false;
164    }
165
166    // TODO: The stl impl of vector would be more efficient here
167    // because it degenerates into a memcpy on pod types. Try to
168    // replace later or use stl::set.
169    for (size_t i = 0; i < num; ++i)
170    {
171        filter->add(*data);
172        ++data;
173    }
174    *status = OK;
175    return true;
176}
177
178// @param filter Of metadata type.
179// @param val To be searched.
180// @return true if a match was found.
181bool findMetadata(const Metadata::Filter& filter, const int32_t val)
182{
183    // Deal with empty and ANY right away
184    if (filter.isEmpty()) return false;
185    if (filter[0] == Metadata::kAny) return true;
186
187    return filter.indexOf(val) >= 0;
188}
189
190}  // anonymous namespace
191
192
193namespace {
194using android::Parcel;
195using android::String16;
196
197// marshalling tag indicating flattened utf16 tags
198// keep in sync with frameworks/base/media/java/android/media/AudioAttributes.java
199const int32_t kAudioAttributesMarshallTagFlattenTags = 1;
200
201// Audio attributes format in a parcel:
202//
203//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
204// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
205// |                       usage                                   |
206// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
207// |                       content_type                            |
208// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
209// |                       source                                  |
210// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
211// |                       flags                                   |
212// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
213// |                       kAudioAttributesMarshallTagFlattenTags  | // ignore tags if not found
214// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
215// |                       flattened tags in UTF16                 |
216// |                         ...                                   |
217// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
218//
219// @param p Parcel that contains audio attributes.
220// @param[out] attributes On exit points to an initialized audio_attributes_t structure
221// @param[out] status On exit contains the status code to be returned.
222void unmarshallAudioAttributes(const Parcel& parcel, audio_attributes_t *attributes)
223{
224    attributes->usage = (audio_usage_t) parcel.readInt32();
225    attributes->content_type = (audio_content_type_t) parcel.readInt32();
226    attributes->source = (audio_source_t) parcel.readInt32();
227    attributes->flags = (audio_flags_mask_t) parcel.readInt32();
228    const bool hasFlattenedTag = (parcel.readInt32() == kAudioAttributesMarshallTagFlattenTags);
229    if (hasFlattenedTag) {
230        // the tags are UTF16, convert to UTF8
231        String16 tags = parcel.readString16();
232        ssize_t realTagSize = utf16_to_utf8_length(tags.string(), tags.size());
233        if (realTagSize <= 0) {
234            strcpy(attributes->tags, "");
235        } else {
236            // copy the flattened string into the attributes as the destination for the conversion:
237            // copying array size -1, array for tags was calloc'd, no need to NULL-terminate it
238            size_t tagSize = realTagSize > AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 ?
239                    AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1 : realTagSize;
240            utf16_to_utf8(tags.string(), tagSize, attributes->tags);
241        }
242    } else {
243        ALOGE("unmarshallAudioAttributes() received unflattened tags, ignoring tag values");
244        strcpy(attributes->tags, "");
245    }
246}
247} // anonymous namespace
248
249
250namespace android {
251
252extern ALooperRoster gLooperRoster;
253
254
255static bool checkPermission(const char* permissionString) {
256#ifndef HAVE_ANDROID_OS
257    return true;
258#endif
259    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
260    bool ok = checkCallingPermission(String16(permissionString));
261    if (!ok) ALOGE("Request requires %s", permissionString);
262    return ok;
263}
264
265// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
266/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
267/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
268
269void MediaPlayerService::instantiate() {
270    defaultServiceManager()->addService(
271            String16("media.player"), new MediaPlayerService());
272}
273
274MediaPlayerService::MediaPlayerService()
275{
276    ALOGV("MediaPlayerService created");
277    mNextConnId = 1;
278
279    mBatteryAudio.refCount = 0;
280    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
281        mBatteryAudio.deviceOn[i] = 0;
282        mBatteryAudio.lastTime[i] = 0;
283        mBatteryAudio.totalTime[i] = 0;
284    }
285    // speaker is on by default
286    mBatteryAudio.deviceOn[SPEAKER] = 1;
287
288    // reset battery stats
289    // if the mediaserver has crashed, battery stats could be left
290    // in bad state, reset the state upon service start.
291    BatteryNotifier& notifier(BatteryNotifier::getInstance());
292    notifier.noteResetVideo();
293    notifier.noteResetAudio();
294
295    MediaPlayerFactory::registerBuiltinFactories();
296}
297
298MediaPlayerService::~MediaPlayerService()
299{
300    ALOGV("MediaPlayerService destroyed");
301}
302
303sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(const String16 &opPackageName)
304{
305    pid_t pid = IPCThreadState::self()->getCallingPid();
306    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid, opPackageName);
307    wp<MediaRecorderClient> w = recorder;
308    Mutex::Autolock lock(mLock);
309    mMediaRecorderClients.add(w);
310    ALOGV("Create new media recorder client from pid %d", pid);
311    return recorder;
312}
313
314void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
315{
316    Mutex::Autolock lock(mLock);
317    mMediaRecorderClients.remove(client);
318    ALOGV("Delete media recorder client");
319}
320
321sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
322{
323    pid_t pid = IPCThreadState::self()->getCallingPid();
324    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
325    ALOGV("Create new media retriever from pid %d", pid);
326    return retriever;
327}
328
329sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
330        int audioSessionId)
331{
332    pid_t pid = IPCThreadState::self()->getCallingPid();
333    int32_t connId = android_atomic_inc(&mNextConnId);
334
335    sp<Client> c = new Client(
336            this, pid, connId, client, audioSessionId,
337            IPCThreadState::self()->getCallingUid());
338
339    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
340         IPCThreadState::self()->getCallingUid());
341
342    wp<Client> w = c;
343    {
344        Mutex::Autolock lock(mLock);
345        mClients.add(w);
346    }
347    return c;
348}
349
350sp<IMediaCodecList> MediaPlayerService::getCodecList() const {
351    return MediaCodecList::getLocalInstance();
352}
353
354sp<IOMX> MediaPlayerService::getOMX() {
355    Mutex::Autolock autoLock(mLock);
356
357    if (mOMX.get() == NULL) {
358        mOMX = new OMX;
359    }
360
361    return mOMX;
362}
363
364sp<ICrypto> MediaPlayerService::makeCrypto() {
365    return new Crypto;
366}
367
368sp<IDrm> MediaPlayerService::makeDrm() {
369    return new Drm;
370}
371
372sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
373    return new HDCP(createEncryptionModule);
374}
375
376sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
377        const String16 &opPackageName,
378        const sp<IRemoteDisplayClient>& client, const String8& iface) {
379    if (!checkPermission("android.permission.CONTROL_WIFI_DISPLAY")) {
380        return NULL;
381    }
382
383    return new RemoteDisplay(opPackageName, client, iface.string());
384}
385
386status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
387{
388    const size_t SIZE = 256;
389    char buffer[SIZE];
390    String8 result;
391
392    result.append(" AudioOutput\n");
393    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
394            mStreamType, mLeftVolume, mRightVolume);
395    result.append(buffer);
396    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
397            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
398    result.append(buffer);
399    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
400            mAuxEffectId, mSendLevel);
401    result.append(buffer);
402
403    ::write(fd, result.string(), result.size());
404    if (mTrack != 0) {
405        mTrack->dump(fd, args);
406    }
407    return NO_ERROR;
408}
409
410status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args)
411{
412    const size_t SIZE = 256;
413    char buffer[SIZE];
414    String8 result;
415    result.append(" Client\n");
416    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
417            mPid, mConnId, mStatus, mLoop?"true": "false");
418    result.append(buffer);
419    write(fd, result.string(), result.size());
420    if (mPlayer != NULL) {
421        mPlayer->dump(fd, args);
422    }
423    if (mAudioOutput != 0) {
424        mAudioOutput->dump(fd, args);
425    }
426    write(fd, "\n", 1);
427    return NO_ERROR;
428}
429
430/**
431 * The only arguments this understands right now are -c, -von and -voff,
432 * which are parsed by ALooperRoster::dump()
433 */
434status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
435{
436    const size_t SIZE = 256;
437    char buffer[SIZE];
438    String8 result;
439    SortedVector< sp<Client> > clients; //to serialise the mutex unlock & client destruction.
440    SortedVector< sp<MediaRecorderClient> > mediaRecorderClients;
441
442    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
443        snprintf(buffer, SIZE, "Permission Denial: "
444                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
445                IPCThreadState::self()->getCallingPid(),
446                IPCThreadState::self()->getCallingUid());
447        result.append(buffer);
448    } else {
449        Mutex::Autolock lock(mLock);
450        for (int i = 0, n = mClients.size(); i < n; ++i) {
451            sp<Client> c = mClients[i].promote();
452            if (c != 0) c->dump(fd, args);
453            clients.add(c);
454        }
455        if (mMediaRecorderClients.size() == 0) {
456                result.append(" No media recorder client\n\n");
457        } else {
458            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
459                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
460                if (c != 0) {
461                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
462                    result.append(buffer);
463                    write(fd, result.string(), result.size());
464                    result = "\n";
465                    c->dump(fd, args);
466                    mediaRecorderClients.add(c);
467                }
468            }
469        }
470
471        result.append(" Files opened and/or mapped:\n");
472        snprintf(buffer, SIZE, "/proc/%d/maps", getpid());
473        FILE *f = fopen(buffer, "r");
474        if (f) {
475            while (!feof(f)) {
476                fgets(buffer, SIZE, f);
477                if (strstr(buffer, " /storage/") ||
478                    strstr(buffer, " /system/sounds/") ||
479                    strstr(buffer, " /data/") ||
480                    strstr(buffer, " /system/media/")) {
481                    result.append("  ");
482                    result.append(buffer);
483                }
484            }
485            fclose(f);
486        } else {
487            result.append("couldn't open ");
488            result.append(buffer);
489            result.append("\n");
490        }
491
492        snprintf(buffer, SIZE, "/proc/%d/fd", getpid());
493        DIR *d = opendir(buffer);
494        if (d) {
495            struct dirent *ent;
496            while((ent = readdir(d)) != NULL) {
497                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
498                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", getpid(), ent->d_name);
499                    struct stat s;
500                    if (lstat(buffer, &s) == 0) {
501                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
502                            char linkto[256];
503                            int len = readlink(buffer, linkto, sizeof(linkto));
504                            if(len > 0) {
505                                if(len > 255) {
506                                    linkto[252] = '.';
507                                    linkto[253] = '.';
508                                    linkto[254] = '.';
509                                    linkto[255] = 0;
510                                } else {
511                                    linkto[len] = 0;
512                                }
513                                if (strstr(linkto, "/storage/") == linkto ||
514                                    strstr(linkto, "/system/sounds/") == linkto ||
515                                    strstr(linkto, "/data/") == linkto ||
516                                    strstr(linkto, "/system/media/") == linkto) {
517                                    result.append("  ");
518                                    result.append(buffer);
519                                    result.append(" -> ");
520                                    result.append(linkto);
521                                    result.append("\n");
522                                }
523                            }
524                        } else {
525                            result.append("  unexpected type for ");
526                            result.append(buffer);
527                            result.append("\n");
528                        }
529                    }
530                }
531            }
532            closedir(d);
533        } else {
534            result.append("couldn't open ");
535            result.append(buffer);
536            result.append("\n");
537        }
538
539        gLooperRoster.dump(fd, args);
540
541        bool dumpMem = false;
542        for (size_t i = 0; i < args.size(); i++) {
543            if (args[i] == String16("-m")) {
544                dumpMem = true;
545            }
546        }
547        if (dumpMem) {
548            dumpMemoryAddresses(fd);
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
561MediaPlayerService::Client::Client(
562        const sp<MediaPlayerService>& service, pid_t pid,
563        int32_t connId, const sp<IMediaPlayerClient>& client,
564        int audioSessionId, uid_t uid)
565{
566    ALOGV("Client(%d) constructor", connId);
567    mPid = pid;
568    mConnId = connId;
569    mService = service;
570    mClient = client;
571    mLoop = false;
572    mStatus = NO_INIT;
573    mAudioSessionId = audioSessionId;
574    mUID = uid;
575    mRetransmitEndpointValid = false;
576    mAudioAttributes = NULL;
577
578#if CALLBACK_ANTAGONIZER
579    ALOGD("create Antagonizer");
580    mAntagonizer = new Antagonizer(notify, this);
581#endif
582}
583
584MediaPlayerService::Client::~Client()
585{
586    ALOGV("Client(%d) destructor pid = %d", mConnId, mPid);
587    mAudioOutput.clear();
588    wp<Client> client(this);
589    disconnect();
590    mService->removeClient(client);
591    if (mAudioAttributes != NULL) {
592        free(mAudioAttributes);
593    }
594}
595
596void MediaPlayerService::Client::disconnect()
597{
598    ALOGV("disconnect(%d) from pid %d", mConnId, mPid);
599    // grab local reference and clear main reference to prevent future
600    // access to object
601    sp<MediaPlayerBase> p;
602    {
603        Mutex::Autolock l(mLock);
604        p = mPlayer;
605        mClient.clear();
606    }
607
608    mPlayer.clear();
609
610    // clear the notification to prevent callbacks to dead client
611    // and reset the player. We assume the player will serialize
612    // access to itself if necessary.
613    if (p != 0) {
614        p->setNotifyCallback(0, 0);
615#if CALLBACK_ANTAGONIZER
616        ALOGD("kill Antagonizer");
617        mAntagonizer->kill();
618#endif
619        p->reset();
620    }
621
622    disconnectNativeWindow();
623
624    IPCThreadState::self()->flushCommands();
625}
626
627sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
628{
629    // determine if we have the right player type
630    sp<MediaPlayerBase> p = mPlayer;
631    if ((p != NULL) && (p->playerType() != playerType)) {
632        ALOGV("delete player");
633        p.clear();
634    }
635    if (p == NULL) {
636        p = MediaPlayerFactory::createPlayer(playerType, this, notify);
637    }
638
639    if (p != NULL) {
640        p->setUID(mUID);
641    }
642
643    return p;
644}
645
646sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
647        player_type playerType)
648{
649    ALOGV("player type = %d", playerType);
650
651    // create the right type of player
652    sp<MediaPlayerBase> p = createPlayer(playerType);
653    if (p == NULL) {
654        return p;
655    }
656
657    if (!p->hardwareOutput()) {
658        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
659                mPid, mAudioAttributes);
660        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
661    }
662
663    return p;
664}
665
666void MediaPlayerService::Client::setDataSource_post(
667        const sp<MediaPlayerBase>& p,
668        status_t status)
669{
670    ALOGV(" setDataSource");
671    mStatus = status;
672    if (mStatus != OK) {
673        ALOGE("  error: %d", mStatus);
674        return;
675    }
676
677    // Set the re-transmission endpoint if one was chosen.
678    if (mRetransmitEndpointValid) {
679        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
680        if (mStatus != NO_ERROR) {
681            ALOGE("setRetransmitEndpoint error: %d", mStatus);
682        }
683    }
684
685    if (mStatus == OK) {
686        mPlayer = p;
687    }
688}
689
690status_t MediaPlayerService::Client::setDataSource(
691        const sp<IMediaHTTPService> &httpService,
692        const char *url,
693        const KeyedVector<String8, String8> *headers)
694{
695    ALOGV("setDataSource(%s)", url);
696    if (url == NULL)
697        return UNKNOWN_ERROR;
698
699    if ((strncmp(url, "http://", 7) == 0) ||
700        (strncmp(url, "https://", 8) == 0) ||
701        (strncmp(url, "rtsp://", 7) == 0)) {
702        if (!checkPermission("android.permission.INTERNET")) {
703            return PERMISSION_DENIED;
704        }
705    }
706
707    if (strncmp(url, "content://", 10) == 0) {
708        // get a filedescriptor for the content Uri and
709        // pass it to the setDataSource(fd) method
710
711        String16 url16(url);
712        int fd = android::openContentProviderFile(url16);
713        if (fd < 0)
714        {
715            ALOGE("Couldn't open fd for %s", url);
716            return UNKNOWN_ERROR;
717        }
718        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
719        close(fd);
720        return mStatus;
721    } else {
722        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
723        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
724        if (p == NULL) {
725            return NO_INIT;
726        }
727
728        setDataSource_post(p, p->setDataSource(httpService, url, headers));
729        return mStatus;
730    }
731}
732
733status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
734{
735    ALOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
736    struct stat sb;
737    int ret = fstat(fd, &sb);
738    if (ret != 0) {
739        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
740        return UNKNOWN_ERROR;
741    }
742
743    ALOGV("st_dev  = %llu", static_cast<uint64_t>(sb.st_dev));
744    ALOGV("st_mode = %u", sb.st_mode);
745    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
746    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
747    ALOGV("st_size = %llu", sb.st_size);
748
749    if (offset >= sb.st_size) {
750        ALOGE("offset error");
751        ::close(fd);
752        return UNKNOWN_ERROR;
753    }
754    if (offset + length > sb.st_size) {
755        length = sb.st_size - offset;
756        ALOGV("calculated length = %lld", length);
757    }
758
759    player_type playerType = MediaPlayerFactory::getPlayerType(this,
760                                                               fd,
761                                                               offset,
762                                                               length);
763    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
764    if (p == NULL) {
765        return NO_INIT;
766    }
767
768    // now set data source
769    setDataSource_post(p, p->setDataSource(fd, offset, length));
770    return mStatus;
771}
772
773status_t MediaPlayerService::Client::setDataSource(
774        const sp<IStreamSource> &source) {
775    // create the right type of player
776    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
777    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
778    if (p == NULL) {
779        return NO_INIT;
780    }
781
782    // now set data source
783    setDataSource_post(p, p->setDataSource(source));
784    return mStatus;
785}
786
787status_t MediaPlayerService::Client::setDataSource(
788        const sp<IDataSource> &source) {
789    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
790    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
791    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
792    if (p == NULL) {
793        return NO_INIT;
794    }
795    // now set data source
796    setDataSource_post(p, p->setDataSource(dataSource));
797    return mStatus;
798}
799
800void MediaPlayerService::Client::disconnectNativeWindow() {
801    if (mConnectedWindow != NULL) {
802        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
803                NATIVE_WINDOW_API_MEDIA);
804
805        if (err != OK) {
806            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
807                    strerror(-err), err);
808        }
809    }
810    mConnectedWindow.clear();
811}
812
813status_t MediaPlayerService::Client::setVideoSurfaceTexture(
814        const sp<IGraphicBufferProducer>& bufferProducer)
815{
816    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
817    sp<MediaPlayerBase> p = getPlayer();
818    if (p == 0) return UNKNOWN_ERROR;
819
820    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
821    if (mConnectedWindowBinder == binder) {
822        return OK;
823    }
824
825    sp<ANativeWindow> anw;
826    if (bufferProducer != NULL) {
827        anw = new Surface(bufferProducer, true /* controlledByApp */);
828        status_t err = native_window_api_connect(anw.get(),
829                NATIVE_WINDOW_API_MEDIA);
830
831        if (err != OK) {
832            ALOGE("setVideoSurfaceTexture failed: %d", err);
833            // Note that we must do the reset before disconnecting from the ANW.
834            // Otherwise queue/dequeue calls could be made on the disconnected
835            // ANW, which may result in errors.
836            reset();
837
838            disconnectNativeWindow();
839
840            return err;
841        }
842    }
843
844    // Note that we must set the player's new GraphicBufferProducer before
845    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
846    // on the disconnected ANW, which may result in errors.
847    status_t err = p->setVideoSurfaceTexture(bufferProducer);
848
849    disconnectNativeWindow();
850
851    mConnectedWindow = anw;
852
853    if (err == OK) {
854        mConnectedWindowBinder = binder;
855    } else {
856        disconnectNativeWindow();
857    }
858
859    return err;
860}
861
862status_t MediaPlayerService::Client::invoke(const Parcel& request,
863                                            Parcel *reply)
864{
865    sp<MediaPlayerBase> p = getPlayer();
866    if (p == NULL) return UNKNOWN_ERROR;
867    return p->invoke(request, reply);
868}
869
870// This call doesn't need to access the native player.
871status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
872{
873    status_t status;
874    media::Metadata::Filter allow, drop;
875
876    if (unmarshallFilter(filter, &allow, &status) &&
877        unmarshallFilter(filter, &drop, &status)) {
878        Mutex::Autolock lock(mLock);
879
880        mMetadataAllow = allow;
881        mMetadataDrop = drop;
882    }
883    return status;
884}
885
886status_t MediaPlayerService::Client::getMetadata(
887        bool update_only, bool /*apply_filter*/, Parcel *reply)
888{
889    sp<MediaPlayerBase> player = getPlayer();
890    if (player == 0) return UNKNOWN_ERROR;
891
892    status_t status;
893    // Placeholder for the return code, updated by the caller.
894    reply->writeInt32(-1);
895
896    media::Metadata::Filter ids;
897
898    // We don't block notifications while we fetch the data. We clear
899    // mMetadataUpdated first so we don't lose notifications happening
900    // during the rest of this call.
901    {
902        Mutex::Autolock lock(mLock);
903        if (update_only) {
904            ids = mMetadataUpdated;
905        }
906        mMetadataUpdated.clear();
907    }
908
909    media::Metadata metadata(reply);
910
911    metadata.appendHeader();
912    status = player->getMetadata(ids, reply);
913
914    if (status != OK) {
915        metadata.resetParcel();
916        ALOGE("getMetadata failed %d", status);
917        return status;
918    }
919
920    // FIXME: Implement filtering on the result. Not critical since
921    // filtering takes place on the update notifications already. This
922    // would be when all the metadata are fetch and a filter is set.
923
924    // Everything is fine, update the metadata length.
925    metadata.updateLength();
926    return OK;
927}
928
929status_t MediaPlayerService::Client::prepareAsync()
930{
931    ALOGV("[%d] prepareAsync", mConnId);
932    sp<MediaPlayerBase> p = getPlayer();
933    if (p == 0) return UNKNOWN_ERROR;
934    status_t ret = p->prepareAsync();
935#if CALLBACK_ANTAGONIZER
936    ALOGD("start Antagonizer");
937    if (ret == NO_ERROR) mAntagonizer->start();
938#endif
939    return ret;
940}
941
942status_t MediaPlayerService::Client::start()
943{
944    ALOGV("[%d] start", mConnId);
945    sp<MediaPlayerBase> p = getPlayer();
946    if (p == 0) return UNKNOWN_ERROR;
947    p->setLooping(mLoop);
948    return p->start();
949}
950
951status_t MediaPlayerService::Client::stop()
952{
953    ALOGV("[%d] stop", mConnId);
954    sp<MediaPlayerBase> p = getPlayer();
955    if (p == 0) return UNKNOWN_ERROR;
956    return p->stop();
957}
958
959status_t MediaPlayerService::Client::pause()
960{
961    ALOGV("[%d] pause", mConnId);
962    sp<MediaPlayerBase> p = getPlayer();
963    if (p == 0) return UNKNOWN_ERROR;
964    return p->pause();
965}
966
967status_t MediaPlayerService::Client::isPlaying(bool* state)
968{
969    *state = false;
970    sp<MediaPlayerBase> p = getPlayer();
971    if (p == 0) return UNKNOWN_ERROR;
972    *state = p->isPlaying();
973    ALOGV("[%d] isPlaying: %d", mConnId, *state);
974    return NO_ERROR;
975}
976
977status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
978{
979    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
980            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
981    sp<MediaPlayerBase> p = getPlayer();
982    if (p == 0) return UNKNOWN_ERROR;
983    return p->setPlaybackSettings(rate);
984}
985
986status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
987{
988    sp<MediaPlayerBase> p = getPlayer();
989    if (p == 0) return UNKNOWN_ERROR;
990    status_t ret = p->getPlaybackSettings(rate);
991    if (ret == NO_ERROR) {
992        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
993                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
994    } else {
995        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
996    }
997    return ret;
998}
999
1000status_t MediaPlayerService::Client::setSyncSettings(
1001        const AVSyncSettings& sync, float videoFpsHint)
1002{
1003    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1004            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1005    sp<MediaPlayerBase> p = getPlayer();
1006    if (p == 0) return UNKNOWN_ERROR;
1007    return p->setSyncSettings(sync, videoFpsHint);
1008}
1009
1010status_t MediaPlayerService::Client::getSyncSettings(
1011        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1012{
1013    sp<MediaPlayerBase> p = getPlayer();
1014    if (p == 0) return UNKNOWN_ERROR;
1015    status_t ret = p->getSyncSettings(sync, videoFps);
1016    if (ret == NO_ERROR) {
1017        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1018                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1019    } else {
1020        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1021    }
1022    return ret;
1023}
1024
1025status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1026{
1027    ALOGV("getCurrentPosition");
1028    sp<MediaPlayerBase> p = getPlayer();
1029    if (p == 0) return UNKNOWN_ERROR;
1030    status_t ret = p->getCurrentPosition(msec);
1031    if (ret == NO_ERROR) {
1032        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1033    } else {
1034        ALOGE("getCurrentPosition returned %d", ret);
1035    }
1036    return ret;
1037}
1038
1039status_t MediaPlayerService::Client::getDuration(int *msec)
1040{
1041    ALOGV("getDuration");
1042    sp<MediaPlayerBase> p = getPlayer();
1043    if (p == 0) return UNKNOWN_ERROR;
1044    status_t ret = p->getDuration(msec);
1045    if (ret == NO_ERROR) {
1046        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1047    } else {
1048        ALOGE("getDuration returned %d", ret);
1049    }
1050    return ret;
1051}
1052
1053status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1054    ALOGV("setNextPlayer");
1055    Mutex::Autolock l(mLock);
1056    sp<Client> c = static_cast<Client*>(player.get());
1057    mNextClient = c;
1058
1059    if (c != NULL) {
1060        if (mAudioOutput != NULL) {
1061            mAudioOutput->setNextOutput(c->mAudioOutput);
1062        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1063            ALOGE("no current audio output");
1064        }
1065
1066        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1067            mPlayer->setNextPlayer(mNextClient->getPlayer());
1068        }
1069    }
1070
1071    return OK;
1072}
1073
1074status_t MediaPlayerService::Client::seekTo(int msec)
1075{
1076    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1077    sp<MediaPlayerBase> p = getPlayer();
1078    if (p == 0) return UNKNOWN_ERROR;
1079    return p->seekTo(msec);
1080}
1081
1082status_t MediaPlayerService::Client::reset()
1083{
1084    ALOGV("[%d] reset", mConnId);
1085    mRetransmitEndpointValid = false;
1086    sp<MediaPlayerBase> p = getPlayer();
1087    if (p == 0) return UNKNOWN_ERROR;
1088    return p->reset();
1089}
1090
1091status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1092{
1093    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1094    // TODO: for hardware output, call player instead
1095    Mutex::Autolock l(mLock);
1096    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1097    return NO_ERROR;
1098}
1099
1100status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1101{
1102    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1103    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1104    unmarshallAudioAttributes(parcel, mAudioAttributes);
1105
1106    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1107            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1108            mAudioAttributes->tags);
1109
1110    if (mAudioOutput != 0) {
1111        mAudioOutput->setAudioAttributes(mAudioAttributes);
1112    }
1113    return NO_ERROR;
1114}
1115
1116status_t MediaPlayerService::Client::setLooping(int loop)
1117{
1118    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1119    mLoop = loop;
1120    sp<MediaPlayerBase> p = getPlayer();
1121    if (p != 0) return p->setLooping(loop);
1122    return NO_ERROR;
1123}
1124
1125status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1126{
1127    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1128
1129    // for hardware output, call player instead
1130    sp<MediaPlayerBase> p = getPlayer();
1131    {
1132      Mutex::Autolock l(mLock);
1133      if (p != 0 && p->hardwareOutput()) {
1134          MediaPlayerHWInterface* hwp =
1135                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1136          return hwp->setVolume(leftVolume, rightVolume);
1137      } else {
1138          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1139          return NO_ERROR;
1140      }
1141    }
1142
1143    return NO_ERROR;
1144}
1145
1146status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1147{
1148    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1149    Mutex::Autolock l(mLock);
1150    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1151    return NO_ERROR;
1152}
1153
1154status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1155{
1156    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1157    Mutex::Autolock l(mLock);
1158    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1159    return NO_ERROR;
1160}
1161
1162status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1163    ALOGV("[%d] setParameter(%d)", mConnId, key);
1164    switch (key) {
1165    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1166    {
1167        Mutex::Autolock l(mLock);
1168        return setAudioAttributes_l(request);
1169    }
1170    default:
1171        sp<MediaPlayerBase> p = getPlayer();
1172        if (p == 0) { return UNKNOWN_ERROR; }
1173        return p->setParameter(key, request);
1174    }
1175}
1176
1177status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1178    ALOGV("[%d] getParameter(%d)", mConnId, key);
1179    sp<MediaPlayerBase> p = getPlayer();
1180    if (p == 0) return UNKNOWN_ERROR;
1181    return p->getParameter(key, reply);
1182}
1183
1184status_t MediaPlayerService::Client::setRetransmitEndpoint(
1185        const struct sockaddr_in* endpoint) {
1186
1187    if (NULL != endpoint) {
1188        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1189        uint16_t p = ntohs(endpoint->sin_port);
1190        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1191                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1192    } else {
1193        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1194    }
1195
1196    sp<MediaPlayerBase> p = getPlayer();
1197
1198    // Right now, the only valid time to set a retransmit endpoint is before
1199    // player selection has been made (since the presence or absence of a
1200    // retransmit endpoint is going to determine which player is selected during
1201    // setDataSource).
1202    if (p != 0) return INVALID_OPERATION;
1203
1204    if (NULL != endpoint) {
1205        mRetransmitEndpoint = *endpoint;
1206        mRetransmitEndpointValid = true;
1207    } else {
1208        mRetransmitEndpointValid = false;
1209    }
1210
1211    return NO_ERROR;
1212}
1213
1214status_t MediaPlayerService::Client::getRetransmitEndpoint(
1215        struct sockaddr_in* endpoint)
1216{
1217    if (NULL == endpoint)
1218        return BAD_VALUE;
1219
1220    sp<MediaPlayerBase> p = getPlayer();
1221
1222    if (p != NULL)
1223        return p->getRetransmitEndpoint(endpoint);
1224
1225    if (!mRetransmitEndpointValid)
1226        return NO_INIT;
1227
1228    *endpoint = mRetransmitEndpoint;
1229
1230    return NO_ERROR;
1231}
1232
1233void MediaPlayerService::Client::notify(
1234        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1235{
1236    Client* client = static_cast<Client*>(cookie);
1237    if (client == NULL) {
1238        return;
1239    }
1240
1241    sp<IMediaPlayerClient> c;
1242    {
1243        Mutex::Autolock l(client->mLock);
1244        c = client->mClient;
1245        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1246            if (client->mAudioOutput != NULL)
1247                client->mAudioOutput->switchToNextOutput();
1248            client->mNextClient->start();
1249            client->mNextClient->mClient->notify(MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1250        }
1251    }
1252
1253    if (MEDIA_INFO == msg &&
1254        MEDIA_INFO_METADATA_UPDATE == ext1) {
1255        const media::Metadata::Type metadata_type = ext2;
1256
1257        if(client->shouldDropMetadata(metadata_type)) {
1258            return;
1259        }
1260
1261        // Update the list of metadata that have changed. getMetadata
1262        // also access mMetadataUpdated and clears it.
1263        client->addNewMetadataUpdate(metadata_type);
1264    }
1265
1266    if (c != NULL) {
1267        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1268        c->notify(msg, ext1, ext2, obj);
1269    }
1270}
1271
1272
1273bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1274{
1275    Mutex::Autolock lock(mLock);
1276
1277    if (findMetadata(mMetadataDrop, code)) {
1278        return true;
1279    }
1280
1281    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1282        return false;
1283    } else {
1284        return true;
1285    }
1286}
1287
1288
1289void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1290    Mutex::Autolock lock(mLock);
1291    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1292        mMetadataUpdated.add(metadata_type);
1293    }
1294}
1295
1296#if CALLBACK_ANTAGONIZER
1297const int Antagonizer::interval = 10000; // 10 msecs
1298
1299Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1300    mExit(false), mActive(false), mClient(client), mCb(cb)
1301{
1302    createThread(callbackThread, this);
1303}
1304
1305void Antagonizer::kill()
1306{
1307    Mutex::Autolock _l(mLock);
1308    mActive = false;
1309    mExit = true;
1310    mCondition.wait(mLock);
1311}
1312
1313int Antagonizer::callbackThread(void* user)
1314{
1315    ALOGD("Antagonizer started");
1316    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1317    while (!p->mExit) {
1318        if (p->mActive) {
1319            ALOGV("send event");
1320            p->mCb(p->mClient, 0, 0, 0);
1321        }
1322        usleep(interval);
1323    }
1324    Mutex::Autolock _l(p->mLock);
1325    p->mCondition.signal();
1326    ALOGD("Antagonizer stopped");
1327    return 0;
1328}
1329#endif
1330
1331#undef LOG_TAG
1332#define LOG_TAG "AudioSink"
1333MediaPlayerService::AudioOutput::AudioOutput(int sessionId, int uid, int pid,
1334        const audio_attributes_t* attr)
1335    : mCallback(NULL),
1336      mCallbackCookie(NULL),
1337      mCallbackData(NULL),
1338      mBytesWritten(0),
1339      mStreamType(AUDIO_STREAM_MUSIC),
1340      mAttributes(attr),
1341      mLeftVolume(1.0),
1342      mRightVolume(1.0),
1343      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1344      mSampleRateHz(0),
1345      mMsecsPerFrame(0),
1346      mFrameSize(0),
1347      mSessionId(sessionId),
1348      mUid(uid),
1349      mPid(pid),
1350      mSendLevel(0.0),
1351      mAuxEffectId(0),
1352      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1353{
1354    ALOGV("AudioOutput(%d)", sessionId);
1355    if (attr != NULL) {
1356        mStreamType = audio_attributes_to_stream_type(attr);
1357    }
1358
1359    setMinBufferCount();
1360}
1361
1362MediaPlayerService::AudioOutput::~AudioOutput()
1363{
1364    close();
1365    delete mCallbackData;
1366}
1367
1368//static
1369void MediaPlayerService::AudioOutput::setMinBufferCount()
1370{
1371    char value[PROPERTY_VALUE_MAX];
1372    if (property_get("ro.kernel.qemu", value, 0)) {
1373        mIsOnEmulator = true;
1374        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1375    }
1376}
1377
1378// static
1379bool MediaPlayerService::AudioOutput::isOnEmulator()
1380{
1381    setMinBufferCount(); // benign race wrt other threads
1382    return mIsOnEmulator;
1383}
1384
1385// static
1386int MediaPlayerService::AudioOutput::getMinBufferCount()
1387{
1388    setMinBufferCount(); // benign race wrt other threads
1389    return mMinBufferCount;
1390}
1391
1392ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1393{
1394    Mutex::Autolock lock(mLock);
1395    if (mTrack == 0) return NO_INIT;
1396    return mTrack->frameCount() * mFrameSize;
1397}
1398
1399ssize_t MediaPlayerService::AudioOutput::frameCount() const
1400{
1401    Mutex::Autolock lock(mLock);
1402    if (mTrack == 0) return NO_INIT;
1403    return mTrack->frameCount();
1404}
1405
1406ssize_t MediaPlayerService::AudioOutput::channelCount() const
1407{
1408    Mutex::Autolock lock(mLock);
1409    if (mTrack == 0) return NO_INIT;
1410    return mTrack->channelCount();
1411}
1412
1413ssize_t MediaPlayerService::AudioOutput::frameSize() const
1414{
1415    Mutex::Autolock lock(mLock);
1416    if (mTrack == 0) return NO_INIT;
1417    return mFrameSize;
1418}
1419
1420uint32_t MediaPlayerService::AudioOutput::latency () const
1421{
1422    Mutex::Autolock lock(mLock);
1423    if (mTrack == 0) return 0;
1424    return mTrack->latency();
1425}
1426
1427float MediaPlayerService::AudioOutput::msecsPerFrame() const
1428{
1429    Mutex::Autolock lock(mLock);
1430    return mMsecsPerFrame;
1431}
1432
1433status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1434{
1435    Mutex::Autolock lock(mLock);
1436    if (mTrack == 0) return NO_INIT;
1437    return mTrack->getPosition(position);
1438}
1439
1440status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1441{
1442    Mutex::Autolock lock(mLock);
1443    if (mTrack == 0) return NO_INIT;
1444    return mTrack->getTimestamp(ts);
1445}
1446
1447status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1448{
1449    Mutex::Autolock lock(mLock);
1450    if (mTrack == 0) return NO_INIT;
1451    *frameswritten = mBytesWritten / mFrameSize;
1452    return OK;
1453}
1454
1455status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1456{
1457    Mutex::Autolock lock(mLock);
1458    if (mTrack == 0) return NO_INIT;
1459    return mTrack->setParameters(keyValuePairs);
1460}
1461
1462String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1463{
1464    Mutex::Autolock lock(mLock);
1465    if (mTrack == 0) return String8::empty();
1466    return mTrack->getParameters(keys);
1467}
1468
1469void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1470    Mutex::Autolock lock(mLock);
1471    mAttributes = attributes;
1472    if (attributes != NULL) {
1473        mStreamType = audio_attributes_to_stream_type(attributes);
1474    }
1475}
1476
1477void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1478{
1479    // do not allow direct stream type modification if attributes have been set
1480    if (mAttributes == NULL) {
1481        mStreamType = streamType;
1482    }
1483}
1484
1485void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1486{
1487    ALOGV("deleteRecycledTrack_l");
1488    if (mRecycledTrack != 0) {
1489
1490        if (mCallbackData != NULL) {
1491            mCallbackData->setOutput(NULL);
1492            mCallbackData->endTrackSwitch();
1493        }
1494
1495        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1496            mRecycledTrack->flush();
1497        }
1498        // An offloaded track isn't flushed because the STREAM_END is reported
1499        // slightly prematurely to allow time for the gapless track switch
1500        // but this means that if we decide not to recycle the track there
1501        // could be a small amount of residual data still playing. We leave
1502        // AudioFlinger to drain the track.
1503
1504        mRecycledTrack.clear();
1505        close_l();
1506        delete mCallbackData;
1507        mCallbackData = NULL;
1508    }
1509}
1510
1511void MediaPlayerService::AudioOutput::close_l()
1512{
1513    mTrack.clear();
1514}
1515
1516status_t MediaPlayerService::AudioOutput::open(
1517        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1518        audio_format_t format, int bufferCount,
1519        AudioCallback cb, void *cookie,
1520        audio_output_flags_t flags,
1521        const audio_offload_info_t *offloadInfo,
1522        bool doNotReconnect,
1523        uint32_t suggestedFrameCount)
1524{
1525    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1526                format, bufferCount, mSessionId, flags);
1527
1528    // offloading is only supported in callback mode for now.
1529    // offloadInfo must be present if offload flag is set
1530    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1531            ((cb == NULL) || (offloadInfo == NULL))) {
1532        return BAD_VALUE;
1533    }
1534
1535    // compute frame count for the AudioTrack internal buffer
1536    size_t frameCount;
1537    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1538        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1539    } else {
1540        // try to estimate the buffer processing fetch size from AudioFlinger.
1541        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1542        uint32_t afSampleRate;
1543        size_t afFrameCount;
1544        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1545            return NO_INIT;
1546        }
1547        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1548            return NO_INIT;
1549        }
1550        const size_t framesPerBuffer =
1551                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1552
1553        if (bufferCount == 0) {
1554            // use suggestedFrameCount
1555            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1556        }
1557        // Check argument bufferCount against the mininum buffer count
1558        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1559            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1560            bufferCount = mMinBufferCount;
1561        }
1562        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1563        // which will be the minimum size permitted.
1564        frameCount = bufferCount * framesPerBuffer;
1565    }
1566
1567    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1568        channelMask = audio_channel_out_mask_from_count(channelCount);
1569        if (0 == channelMask) {
1570            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1571            return NO_INIT;
1572        }
1573    }
1574
1575    Mutex::Autolock lock(mLock);
1576    mCallback = cb;
1577    mCallbackCookie = cookie;
1578
1579    // Check whether we can recycle the track
1580    bool reuse = false;
1581    bool bothOffloaded = false;
1582
1583    if (mRecycledTrack != 0) {
1584        // check whether we are switching between two offloaded tracks
1585        bothOffloaded = (flags & mRecycledTrack->getFlags()
1586                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1587
1588        // check if the existing track can be reused as-is, or if a new track needs to be created.
1589        reuse = true;
1590
1591        if ((mCallbackData == NULL && mCallback != NULL) ||
1592                (mCallbackData != NULL && mCallback == NULL)) {
1593            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1594            ALOGV("can't chain callback and write");
1595            reuse = false;
1596        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1597                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1598            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1599                  mRecycledTrack->getSampleRate(), sampleRate,
1600                  mRecycledTrack->channelCount(), channelCount);
1601            reuse = false;
1602        } else if (flags != mFlags) {
1603            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1604            reuse = false;
1605        } else if (mRecycledTrack->format() != format) {
1606            reuse = false;
1607        }
1608    } else {
1609        ALOGV("no track available to recycle");
1610    }
1611
1612    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1613
1614    // If we can't recycle and both tracks are offloaded
1615    // we must close the previous output before opening a new one
1616    if (bothOffloaded && !reuse) {
1617        ALOGV("both offloaded and not recycling");
1618        deleteRecycledTrack_l();
1619    }
1620
1621    sp<AudioTrack> t;
1622    CallbackData *newcbd = NULL;
1623
1624    // We don't attempt to create a new track if we are recycling an
1625    // offloaded track. But, if we are recycling a non-offloaded or we
1626    // are switching where one is offloaded and one isn't then we create
1627    // the new track in advance so that we can read additional stream info
1628
1629    if (!(reuse && bothOffloaded)) {
1630        ALOGV("creating new AudioTrack");
1631
1632        if (mCallback != NULL) {
1633            newcbd = new CallbackData(this);
1634            t = new AudioTrack(
1635                    mStreamType,
1636                    sampleRate,
1637                    format,
1638                    channelMask,
1639                    frameCount,
1640                    flags,
1641                    CallbackWrapper,
1642                    newcbd,
1643                    0,  // notification frames
1644                    mSessionId,
1645                    AudioTrack::TRANSFER_CALLBACK,
1646                    offloadInfo,
1647                    mUid,
1648                    mPid,
1649                    mAttributes,
1650                    doNotReconnect);
1651        } else {
1652            t = new AudioTrack(
1653                    mStreamType,
1654                    sampleRate,
1655                    format,
1656                    channelMask,
1657                    frameCount,
1658                    flags,
1659                    NULL, // callback
1660                    NULL, // user data
1661                    0, // notification frames
1662                    mSessionId,
1663                    AudioTrack::TRANSFER_DEFAULT,
1664                    NULL, // offload info
1665                    mUid,
1666                    mPid,
1667                    mAttributes,
1668                    doNotReconnect);
1669        }
1670
1671        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1672            ALOGE("Unable to create audio track");
1673            delete newcbd;
1674            // t goes out of scope, so reference count drops to zero
1675            return NO_INIT;
1676        } else {
1677            // successful AudioTrack initialization implies a legacy stream type was generated
1678            // from the audio attributes
1679            mStreamType = t->streamType();
1680        }
1681    }
1682
1683    if (reuse) {
1684        CHECK(mRecycledTrack != NULL);
1685
1686        if (!bothOffloaded) {
1687            if (mRecycledTrack->frameCount() != t->frameCount()) {
1688                ALOGV("framecount differs: %u/%u frames",
1689                      mRecycledTrack->frameCount(), t->frameCount());
1690                reuse = false;
1691            }
1692        }
1693
1694        if (reuse) {
1695            ALOGV("chaining to next output and recycling track");
1696            close_l();
1697            mTrack = mRecycledTrack;
1698            mRecycledTrack.clear();
1699            if (mCallbackData != NULL) {
1700                mCallbackData->setOutput(this);
1701            }
1702            delete newcbd;
1703            return OK;
1704        }
1705    }
1706
1707    // we're not going to reuse the track, unblock and flush it
1708    // this was done earlier if both tracks are offloaded
1709    if (!bothOffloaded) {
1710        deleteRecycledTrack_l();
1711    }
1712
1713    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1714
1715    mCallbackData = newcbd;
1716    ALOGV("setVolume");
1717    t->setVolume(mLeftVolume, mRightVolume);
1718
1719    mSampleRateHz = sampleRate;
1720    mFlags = t->getFlags(); // we suggest the flags above, but new AudioTrack() may not grant it.
1721    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1722    mFrameSize = t->frameSize();
1723    uint32_t pos;
1724    if (t->getPosition(&pos) == OK) {
1725        mBytesWritten = uint64_t(pos) * mFrameSize;
1726    }
1727    mTrack = t;
1728
1729    status_t res = NO_ERROR;
1730    // Note some output devices may give us a direct track even though we don't specify it.
1731    // Example: Line application b/17459982.
1732    if ((mFlags & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1733        res = t->setPlaybackRate(mPlaybackRate);
1734        if (res == NO_ERROR) {
1735            t->setAuxEffectSendLevel(mSendLevel);
1736            res = t->attachAuxEffect(mAuxEffectId);
1737        }
1738    }
1739    ALOGV("open() DONE status %d", res);
1740    return res;
1741}
1742
1743status_t MediaPlayerService::AudioOutput::start()
1744{
1745    ALOGV("start");
1746    Mutex::Autolock lock(mLock);
1747    if (mCallbackData != NULL) {
1748        mCallbackData->endTrackSwitch();
1749    }
1750    if (mTrack != 0) {
1751        mTrack->setVolume(mLeftVolume, mRightVolume);
1752        mTrack->setAuxEffectSendLevel(mSendLevel);
1753        return mTrack->start();
1754    }
1755    return NO_INIT;
1756}
1757
1758void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1759    Mutex::Autolock lock(mLock);
1760    mNextOutput = nextOutput;
1761}
1762
1763void MediaPlayerService::AudioOutput::switchToNextOutput() {
1764    ALOGV("switchToNextOutput");
1765
1766    // Try to acquire the callback lock before moving track (without incurring deadlock).
1767    const unsigned kMaxSwitchTries = 100;
1768    Mutex::Autolock lock(mLock);
1769    for (unsigned tries = 0;;) {
1770        if (mTrack == 0) {
1771            return;
1772        }
1773        if (mNextOutput != NULL && mNextOutput != this) {
1774            if (mCallbackData != NULL) {
1775                // two alternative approaches
1776#if 1
1777                CallbackData *callbackData = mCallbackData;
1778                mLock.unlock();
1779                // proper acquisition sequence
1780                callbackData->lock();
1781                mLock.lock();
1782                // Caution: it is unlikely that someone deleted our callback or changed our target
1783                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1784                    // fatal if we are starved out.
1785                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1786                            "switchToNextOutput() cannot obtain correct lock sequence");
1787                    callbackData->unlock();
1788                    continue;
1789                }
1790                callbackData->mSwitching = true; // begin track switch
1791#else
1792                // tryBeginTrackSwitch() returns false if the callback has the lock.
1793                if (!mCallbackData->tryBeginTrackSwitch()) {
1794                    // fatal if we are starved out.
1795                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1796                            "switchToNextOutput() cannot obtain callback lock");
1797                    mLock.unlock();
1798                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1799                    mLock.lock();
1800                    continue;
1801                }
1802#endif
1803            }
1804
1805            Mutex::Autolock nextLock(mNextOutput->mLock);
1806
1807            // If the next output track is not NULL, then it has been
1808            // opened already for playback.
1809            // This is possible even without the next player being started,
1810            // for example, the next player could be prepared and seeked.
1811            //
1812            // Presuming it isn't advisable to force the track over.
1813             if (mNextOutput->mTrack == NULL) {
1814                ALOGD("Recycling track for gapless playback");
1815                delete mNextOutput->mCallbackData;
1816                mNextOutput->mCallbackData = mCallbackData;
1817                mNextOutput->mRecycledTrack = mTrack;
1818                mNextOutput->mSampleRateHz = mSampleRateHz;
1819                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1820                mNextOutput->mBytesWritten = mBytesWritten;
1821                mNextOutput->mFlags = mFlags;
1822                mNextOutput->mFrameSize = mFrameSize;
1823                close_l();
1824                mCallbackData = NULL;  // destruction handled by mNextOutput
1825            } else {
1826                ALOGW("Ignoring gapless playback because next player has already started");
1827                // remove track in case resource needed for future players.
1828                if (mCallbackData != NULL) {
1829                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1830                }
1831                close_l();
1832            }
1833        }
1834        break;
1835    }
1836}
1837
1838ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1839{
1840    Mutex::Autolock lock(mLock);
1841    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1842
1843    //ALOGV("write(%p, %u)", buffer, size);
1844    if (mTrack != 0) {
1845        ssize_t ret = mTrack->write(buffer, size, blocking);
1846        if (ret >= 0) {
1847            mBytesWritten += ret;
1848        }
1849        return ret;
1850    }
1851    return NO_INIT;
1852}
1853
1854void MediaPlayerService::AudioOutput::stop()
1855{
1856    ALOGV("stop");
1857    Mutex::Autolock lock(mLock);
1858    mBytesWritten = 0;
1859    if (mTrack != 0) mTrack->stop();
1860}
1861
1862void MediaPlayerService::AudioOutput::flush()
1863{
1864    ALOGV("flush");
1865    Mutex::Autolock lock(mLock);
1866    mBytesWritten = 0;
1867    if (mTrack != 0) mTrack->flush();
1868}
1869
1870void MediaPlayerService::AudioOutput::pause()
1871{
1872    ALOGV("pause");
1873    Mutex::Autolock lock(mLock);
1874    if (mTrack != 0) mTrack->pause();
1875}
1876
1877void MediaPlayerService::AudioOutput::close()
1878{
1879    ALOGV("close");
1880    Mutex::Autolock lock(mLock);
1881    close_l();
1882}
1883
1884void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1885{
1886    ALOGV("setVolume(%f, %f)", left, right);
1887    Mutex::Autolock lock(mLock);
1888    mLeftVolume = left;
1889    mRightVolume = right;
1890    if (mTrack != 0) {
1891        mTrack->setVolume(left, right);
1892    }
1893}
1894
1895status_t MediaPlayerService::AudioOutput::setPlaybackRate(const AudioPlaybackRate &rate)
1896{
1897    ALOGV("setPlaybackRate(%f %f %d %d)",
1898                rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
1899    Mutex::Autolock lock(mLock);
1900    if (mTrack == 0) {
1901        // remember rate so that we can set it when the track is opened
1902        mPlaybackRate = rate;
1903        return OK;
1904    }
1905    status_t res = mTrack->setPlaybackRate(rate);
1906    if (res != NO_ERROR) {
1907        return res;
1908    }
1909    // rate.mSpeed is always greater than 0 if setPlaybackRate succeeded
1910    CHECK_GT(rate.mSpeed, 0.f);
1911    mPlaybackRate = rate;
1912    if (mSampleRateHz != 0) {
1913        mMsecsPerFrame = 1E3f / (rate.mSpeed * mSampleRateHz);
1914    }
1915    return res;
1916}
1917
1918status_t MediaPlayerService::AudioOutput::getPlaybackRate(AudioPlaybackRate *rate)
1919{
1920    ALOGV("setPlaybackRate");
1921    Mutex::Autolock lock(mLock);
1922    if (mTrack == 0) {
1923        return NO_INIT;
1924    }
1925    *rate = mTrack->getPlaybackRate();
1926    return NO_ERROR;
1927}
1928
1929status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
1930{
1931    ALOGV("setAuxEffectSendLevel(%f)", level);
1932    Mutex::Autolock lock(mLock);
1933    mSendLevel = level;
1934    if (mTrack != 0) {
1935        return mTrack->setAuxEffectSendLevel(level);
1936    }
1937    return NO_ERROR;
1938}
1939
1940status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
1941{
1942    ALOGV("attachAuxEffect(%d)", effectId);
1943    Mutex::Autolock lock(mLock);
1944    mAuxEffectId = effectId;
1945    if (mTrack != 0) {
1946        return mTrack->attachAuxEffect(effectId);
1947    }
1948    return NO_ERROR;
1949}
1950
1951// static
1952void MediaPlayerService::AudioOutput::CallbackWrapper(
1953        int event, void *cookie, void *info) {
1954    //ALOGV("callbackwrapper");
1955    CallbackData *data = (CallbackData*)cookie;
1956    // lock to ensure we aren't caught in the middle of a track switch.
1957    data->lock();
1958    AudioOutput *me = data->getOutput();
1959    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1960    if (me == NULL) {
1961        // no output set, likely because the track was scheduled to be reused
1962        // by another player, but the format turned out to be incompatible.
1963        data->unlock();
1964        if (buffer != NULL) {
1965            buffer->size = 0;
1966        }
1967        return;
1968    }
1969
1970    switch(event) {
1971    case AudioTrack::EVENT_MORE_DATA: {
1972        size_t actualSize = (*me->mCallback)(
1973                me, buffer->raw, buffer->size, me->mCallbackCookie,
1974                CB_EVENT_FILL_BUFFER);
1975
1976        // Log when no data is returned from the callback.
1977        // (1) We may have no data (especially with network streaming sources).
1978        // (2) We may have reached the EOS and the audio track is not stopped yet.
1979        // Note that AwesomePlayer/AudioPlayer will only return zero size when it reaches the EOS.
1980        // NuPlayerRenderer will return zero when it doesn't have data (it doesn't block to fill).
1981        //
1982        // This is a benign busy-wait, with the next data request generated 10 ms or more later;
1983        // nevertheless for power reasons, we don't want to see too many of these.
1984
1985        ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
1986
1987        me->mBytesWritten += actualSize;  // benign race with reader.
1988        buffer->size = actualSize;
1989        } break;
1990
1991    case AudioTrack::EVENT_STREAM_END:
1992        // currently only occurs for offloaded callbacks
1993        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
1994        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
1995                me->mCallbackCookie, CB_EVENT_STREAM_END);
1996        break;
1997
1998    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
1999        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
2000        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
2001                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
2002        break;
2003
2004    case AudioTrack::EVENT_UNDERRUN:
2005        // This occurs when there is no data available, typically
2006        // when there is a failure to supply data to the AudioTrack.  It can also
2007        // occur in non-offloaded mode when the audio device comes out of standby.
2008        //
2009        // If an AudioTrack underruns it outputs silence. Since this happens suddenly
2010        // it may sound like an audible pop or glitch.
2011        //
2012        // The underrun event is sent once per track underrun; the condition is reset
2013        // when more data is sent to the AudioTrack.
2014        ALOGI("callbackwrapper: EVENT_UNDERRUN (discarded)");
2015        break;
2016
2017    default:
2018        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
2019    }
2020
2021    data->unlock();
2022}
2023
2024int MediaPlayerService::AudioOutput::getSessionId() const
2025{
2026    Mutex::Autolock lock(mLock);
2027    return mSessionId;
2028}
2029
2030uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
2031{
2032    Mutex::Autolock lock(mLock);
2033    if (mTrack == 0) return 0;
2034    return mTrack->getSampleRate();
2035}
2036
2037////////////////////////////////////////////////////////////////////////////////
2038
2039struct CallbackThread : public Thread {
2040    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
2041                   MediaPlayerBase::AudioSink::AudioCallback cb,
2042                   void *cookie);
2043
2044protected:
2045    virtual ~CallbackThread();
2046
2047    virtual bool threadLoop();
2048
2049private:
2050    wp<MediaPlayerBase::AudioSink> mSink;
2051    MediaPlayerBase::AudioSink::AudioCallback mCallback;
2052    void *mCookie;
2053    void *mBuffer;
2054    size_t mBufferSize;
2055
2056    CallbackThread(const CallbackThread &);
2057    CallbackThread &operator=(const CallbackThread &);
2058};
2059
2060CallbackThread::CallbackThread(
2061        const wp<MediaPlayerBase::AudioSink> &sink,
2062        MediaPlayerBase::AudioSink::AudioCallback cb,
2063        void *cookie)
2064    : mSink(sink),
2065      mCallback(cb),
2066      mCookie(cookie),
2067      mBuffer(NULL),
2068      mBufferSize(0) {
2069}
2070
2071CallbackThread::~CallbackThread() {
2072    if (mBuffer) {
2073        free(mBuffer);
2074        mBuffer = NULL;
2075    }
2076}
2077
2078bool CallbackThread::threadLoop() {
2079    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
2080    if (sink == NULL) {
2081        return false;
2082    }
2083
2084    if (mBuffer == NULL) {
2085        mBufferSize = sink->bufferSize();
2086        mBuffer = malloc(mBufferSize);
2087    }
2088
2089    size_t actualSize =
2090        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
2091                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
2092
2093    if (actualSize > 0) {
2094        sink->write(mBuffer, actualSize);
2095        // Could return false on sink->write() error or short count.
2096        // Not necessarily appropriate but would work for AudioCache behavior.
2097    }
2098
2099    return true;
2100}
2101
2102////////////////////////////////////////////////////////////////////////////////
2103
2104void MediaPlayerService::addBatteryData(uint32_t params)
2105{
2106    Mutex::Autolock lock(mLock);
2107
2108    int32_t time = systemTime() / 1000000L;
2109
2110    // change audio output devices. This notification comes from AudioFlinger
2111    if ((params & kBatteryDataSpeakerOn)
2112            || (params & kBatteryDataOtherAudioDeviceOn)) {
2113
2114        int deviceOn[NUM_AUDIO_DEVICES];
2115        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2116            deviceOn[i] = 0;
2117        }
2118
2119        if ((params & kBatteryDataSpeakerOn)
2120                && (params & kBatteryDataOtherAudioDeviceOn)) {
2121            deviceOn[SPEAKER_AND_OTHER] = 1;
2122        } else if (params & kBatteryDataSpeakerOn) {
2123            deviceOn[SPEAKER] = 1;
2124        } else {
2125            deviceOn[OTHER_AUDIO_DEVICE] = 1;
2126        }
2127
2128        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2129            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
2130
2131                if (mBatteryAudio.refCount > 0) { // if playing audio
2132                    if (!deviceOn[i]) {
2133                        mBatteryAudio.lastTime[i] += time;
2134                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2135                        mBatteryAudio.lastTime[i] = 0;
2136                    } else {
2137                        mBatteryAudio.lastTime[i] = 0 - time;
2138                    }
2139                }
2140
2141                mBatteryAudio.deviceOn[i] = deviceOn[i];
2142            }
2143        }
2144        return;
2145    }
2146
2147    // an audio stream is started
2148    if (params & kBatteryDataAudioFlingerStart) {
2149        // record the start time only if currently no other audio
2150        // is being played
2151        if (mBatteryAudio.refCount == 0) {
2152            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2153                if (mBatteryAudio.deviceOn[i]) {
2154                    mBatteryAudio.lastTime[i] -= time;
2155                }
2156            }
2157        }
2158
2159        mBatteryAudio.refCount ++;
2160        return;
2161
2162    } else if (params & kBatteryDataAudioFlingerStop) {
2163        if (mBatteryAudio.refCount <= 0) {
2164            ALOGW("Battery track warning: refCount is <= 0");
2165            return;
2166        }
2167
2168        // record the stop time only if currently this is the only
2169        // audio being played
2170        if (mBatteryAudio.refCount == 1) {
2171            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2172                if (mBatteryAudio.deviceOn[i]) {
2173                    mBatteryAudio.lastTime[i] += time;
2174                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2175                    mBatteryAudio.lastTime[i] = 0;
2176                }
2177            }
2178        }
2179
2180        mBatteryAudio.refCount --;
2181        return;
2182    }
2183
2184    int uid = IPCThreadState::self()->getCallingUid();
2185    if (uid == AID_MEDIA) {
2186        return;
2187    }
2188    int index = mBatteryData.indexOfKey(uid);
2189
2190    if (index < 0) { // create a new entry for this UID
2191        BatteryUsageInfo info;
2192        info.audioTotalTime = 0;
2193        info.videoTotalTime = 0;
2194        info.audioLastTime = 0;
2195        info.videoLastTime = 0;
2196        info.refCount = 0;
2197
2198        if (mBatteryData.add(uid, info) == NO_MEMORY) {
2199            ALOGE("Battery track error: no memory for new app");
2200            return;
2201        }
2202    }
2203
2204    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
2205
2206    if (params & kBatteryDataCodecStarted) {
2207        if (params & kBatteryDataTrackAudio) {
2208            info.audioLastTime -= time;
2209            info.refCount ++;
2210        }
2211        if (params & kBatteryDataTrackVideo) {
2212            info.videoLastTime -= time;
2213            info.refCount ++;
2214        }
2215    } else {
2216        if (info.refCount == 0) {
2217            ALOGW("Battery track warning: refCount is already 0");
2218            return;
2219        } else if (info.refCount < 0) {
2220            ALOGE("Battery track error: refCount < 0");
2221            mBatteryData.removeItem(uid);
2222            return;
2223        }
2224
2225        if (params & kBatteryDataTrackAudio) {
2226            info.audioLastTime += time;
2227            info.refCount --;
2228        }
2229        if (params & kBatteryDataTrackVideo) {
2230            info.videoLastTime += time;
2231            info.refCount --;
2232        }
2233
2234        // no stream is being played by this UID
2235        if (info.refCount == 0) {
2236            info.audioTotalTime += info.audioLastTime;
2237            info.audioLastTime = 0;
2238            info.videoTotalTime += info.videoLastTime;
2239            info.videoLastTime = 0;
2240        }
2241    }
2242}
2243
2244status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2245    Mutex::Autolock lock(mLock);
2246
2247    // audio output devices usage
2248    int32_t time = systemTime() / 1000000L; //in ms
2249    int32_t totalTime;
2250
2251    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2252        totalTime = mBatteryAudio.totalTime[i];
2253
2254        if (mBatteryAudio.deviceOn[i]
2255            && (mBatteryAudio.lastTime[i] != 0)) {
2256                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2257                totalTime += tmpTime;
2258        }
2259
2260        reply->writeInt32(totalTime);
2261        // reset the total time
2262        mBatteryAudio.totalTime[i] = 0;
2263   }
2264
2265    // codec usage
2266    BatteryUsageInfo info;
2267    int size = mBatteryData.size();
2268
2269    reply->writeInt32(size);
2270    int i = 0;
2271
2272    while (i < size) {
2273        info = mBatteryData.valueAt(i);
2274
2275        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2276        reply->writeInt32(info.audioTotalTime);
2277        reply->writeInt32(info.videoTotalTime);
2278
2279        info.audioTotalTime = 0;
2280        info.videoTotalTime = 0;
2281
2282        // remove the UID entry where no stream is being played
2283        if (info.refCount <= 0) {
2284            mBatteryData.removeItemsAt(i);
2285            size --;
2286            i --;
2287        }
2288        i++;
2289    }
2290    return NO_ERROR;
2291}
2292} // namespace android
2293