MediaPlayerService.cpp revision 36d0ca16024820df9a12903d2ac443fabcc180bc 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18// Proxy for media player implementations
19
20//#define LOG_NDEBUG 0
21#define LOG_TAG "MediaPlayerService"
22#include <utils/Log.h>
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <sys/time.h>
27#include <dirent.h>
28#include <unistd.h>
29
30#include <string.h>
31
32#include <cutils/atomic.h>
33#include <cutils/properties.h> // for property_get
34
35#include <utils/misc.h>
36
37#include <binder/IPCThreadState.h>
38#include <binder/IServiceManager.h>
39#include <binder/MemoryHeapBase.h>
40#include <binder/MemoryBase.h>
41#include <gui/Surface.h>
42#include <utils/Errors.h>  // for status_t
43#include <utils/String8.h>
44#include <utils/SystemClock.h>
45#include <utils/Timers.h>
46#include <utils/Vector.h>
47
48#include <media/AudioPolicyHelper.h>
49#include <media/IMediaHTTPService.h>
50#include <media/IRemoteDisplay.h>
51#include <media/IRemoteDisplayClient.h>
52#include <media/MediaPlayerInterface.h>
53#include <media/mediarecorder.h>
54#include <media/MediaMetadataRetrieverInterface.h>
55#include <media/Metadata.h>
56#include <media/AudioTrack.h>
57#include <media/MemoryLeakTrackUtil.h>
58#include <media/stagefright/MediaCodecList.h>
59#include <media/stagefright/MediaErrors.h>
60#include <media/stagefright/Utils.h>
61#include <media/stagefright/foundation/ADebug.h>
62#include <media/stagefright/foundation/ALooperRoster.h>
63#include <mediautils/BatteryNotifier.h>
64
65#include <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 "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    BatteryNotifier& notifier(BatteryNotifier::getInstance());
288    notifier.noteResetVideo();
289    notifier.noteResetAudio();
290
291    MediaPlayerFactory::registerBuiltinFactories();
292}
293
294MediaPlayerService::~MediaPlayerService()
295{
296    ALOGV("MediaPlayerService destroyed");
297}
298
299sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(const String16 &opPackageName)
300{
301    pid_t pid = IPCThreadState::self()->getCallingPid();
302    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid, opPackageName);
303    wp<MediaRecorderClient> w = recorder;
304    Mutex::Autolock lock(mLock);
305    mMediaRecorderClients.add(w);
306    ALOGV("Create new media recorder client from pid %d", pid);
307    return recorder;
308}
309
310void MediaPlayerService::removeMediaRecorderClient(const wp<MediaRecorderClient>& client)
311{
312    Mutex::Autolock lock(mLock);
313    mMediaRecorderClients.remove(client);
314    ALOGV("Delete media recorder client");
315}
316
317sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
318{
319    pid_t pid = IPCThreadState::self()->getCallingPid();
320    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
321    ALOGV("Create new media retriever from pid %d", pid);
322    return retriever;
323}
324
325sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
326        int audioSessionId)
327{
328    pid_t pid = IPCThreadState::self()->getCallingPid();
329    int32_t connId = android_atomic_inc(&mNextConnId);
330
331    sp<Client> c = new Client(
332            this, pid, connId, client, audioSessionId,
333            IPCThreadState::self()->getCallingUid());
334
335    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
336         IPCThreadState::self()->getCallingUid());
337
338    wp<Client> w = c;
339    {
340        Mutex::Autolock lock(mLock);
341        mClients.add(w);
342    }
343    return c;
344}
345
346sp<IMediaCodecList> MediaPlayerService::getCodecList() const {
347    return MediaCodecList::getLocalInstance();
348}
349
350sp<IOMX> MediaPlayerService::getOMX() {
351    Mutex::Autolock autoLock(mLock);
352
353    if (mOMX.get() == NULL) {
354        mOMX = new OMX;
355    }
356
357    return mOMX;
358}
359
360sp<ICrypto> MediaPlayerService::makeCrypto() {
361    return new Crypto;
362}
363
364sp<IDrm> MediaPlayerService::makeDrm() {
365    return new Drm;
366}
367
368sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
369    return new HDCP(createEncryptionModule);
370}
371
372sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
373        const String16 &opPackageName,
374        const sp<IRemoteDisplayClient>& client, const String8& iface) {
375    if (!checkPermission("android.permission.CONTROL_WIFI_DISPLAY")) {
376        return NULL;
377    }
378
379    return new RemoteDisplay(opPackageName, client, iface.string());
380}
381
382status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
383{
384    const size_t SIZE = 256;
385    char buffer[SIZE];
386    String8 result;
387
388    result.append(" AudioOutput\n");
389    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
390            mStreamType, mLeftVolume, mRightVolume);
391    result.append(buffer);
392    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
393            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
394    result.append(buffer);
395    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
396            mAuxEffectId, mSendLevel);
397    result.append(buffer);
398
399    ::write(fd, result.string(), result.size());
400    if (mTrack != 0) {
401        mTrack->dump(fd, args);
402    }
403    return NO_ERROR;
404}
405
406status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args)
407{
408    const size_t SIZE = 256;
409    char buffer[SIZE];
410    String8 result;
411    result.append(" Client\n");
412    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
413            mPid, mConnId, mStatus, mLoop?"true": "false");
414    result.append(buffer);
415    write(fd, result.string(), result.size());
416    if (mPlayer != NULL) {
417        mPlayer->dump(fd, args);
418    }
419    if (mAudioOutput != 0) {
420        mAudioOutput->dump(fd, args);
421    }
422    write(fd, "\n", 1);
423    return NO_ERROR;
424}
425
426/**
427 * The only arguments this understands right now are -c, -von and -voff,
428 * which are parsed by ALooperRoster::dump()
429 */
430status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
431{
432    const size_t SIZE = 256;
433    char buffer[SIZE];
434    String8 result;
435    SortedVector< sp<Client> > clients; //to serialise the mutex unlock & client destruction.
436    SortedVector< sp<MediaRecorderClient> > mediaRecorderClients;
437
438    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
439        snprintf(buffer, SIZE, "Permission Denial: "
440                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
441                IPCThreadState::self()->getCallingPid(),
442                IPCThreadState::self()->getCallingUid());
443        result.append(buffer);
444    } else {
445        Mutex::Autolock lock(mLock);
446        for (int i = 0, n = mClients.size(); i < n; ++i) {
447            sp<Client> c = mClients[i].promote();
448            if (c != 0) c->dump(fd, args);
449            clients.add(c);
450        }
451        if (mMediaRecorderClients.size() == 0) {
452                result.append(" No media recorder client\n\n");
453        } else {
454            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
455                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
456                if (c != 0) {
457                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
458                    result.append(buffer);
459                    write(fd, result.string(), result.size());
460                    result = "\n";
461                    c->dump(fd, args);
462                    mediaRecorderClients.add(c);
463                }
464            }
465        }
466
467        result.append(" Files opened and/or mapped:\n");
468        snprintf(buffer, SIZE, "/proc/%d/maps", getpid());
469        FILE *f = fopen(buffer, "r");
470        if (f) {
471            while (!feof(f)) {
472                fgets(buffer, SIZE, f);
473                if (strstr(buffer, " /storage/") ||
474                    strstr(buffer, " /system/sounds/") ||
475                    strstr(buffer, " /data/") ||
476                    strstr(buffer, " /system/media/")) {
477                    result.append("  ");
478                    result.append(buffer);
479                }
480            }
481            fclose(f);
482        } else {
483            result.append("couldn't open ");
484            result.append(buffer);
485            result.append("\n");
486        }
487
488        snprintf(buffer, SIZE, "/proc/%d/fd", getpid());
489        DIR *d = opendir(buffer);
490        if (d) {
491            struct dirent *ent;
492            while((ent = readdir(d)) != NULL) {
493                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
494                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", getpid(), ent->d_name);
495                    struct stat s;
496                    if (lstat(buffer, &s) == 0) {
497                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
498                            char linkto[256];
499                            int len = readlink(buffer, linkto, sizeof(linkto));
500                            if(len > 0) {
501                                if(len > 255) {
502                                    linkto[252] = '.';
503                                    linkto[253] = '.';
504                                    linkto[254] = '.';
505                                    linkto[255] = 0;
506                                } else {
507                                    linkto[len] = 0;
508                                }
509                                if (strstr(linkto, "/storage/") == linkto ||
510                                    strstr(linkto, "/system/sounds/") == linkto ||
511                                    strstr(linkto, "/data/") == linkto ||
512                                    strstr(linkto, "/system/media/") == linkto) {
513                                    result.append("  ");
514                                    result.append(buffer);
515                                    result.append(" -> ");
516                                    result.append(linkto);
517                                    result.append("\n");
518                                }
519                            }
520                        } else {
521                            result.append("  unexpected type for ");
522                            result.append(buffer);
523                            result.append("\n");
524                        }
525                    }
526                }
527            }
528            closedir(d);
529        } else {
530            result.append("couldn't open ");
531            result.append(buffer);
532            result.append("\n");
533        }
534
535        gLooperRoster.dump(fd, args);
536
537        bool dumpMem = false;
538        for (size_t i = 0; i < args.size(); i++) {
539            if (args[i] == String16("-m")) {
540                dumpMem = true;
541            }
542        }
543        if (dumpMem) {
544            dumpMemoryAddresses(fd);
545        }
546    }
547    write(fd, result.string(), result.size());
548    return NO_ERROR;
549}
550
551void MediaPlayerService::removeClient(const wp<Client>& client)
552{
553    Mutex::Autolock lock(mLock);
554    mClients.remove(client);
555}
556
557MediaPlayerService::Client::Client(
558        const sp<MediaPlayerService>& service, pid_t pid,
559        int32_t connId, const sp<IMediaPlayerClient>& client,
560        int audioSessionId, uid_t uid)
561{
562    ALOGV("Client(%d) constructor", connId);
563    mPid = pid;
564    mConnId = connId;
565    mService = service;
566    mClient = client;
567    mLoop = false;
568    mStatus = NO_INIT;
569    mAudioSessionId = audioSessionId;
570    mUID = uid;
571    mRetransmitEndpointValid = false;
572    mAudioAttributes = NULL;
573
574#if CALLBACK_ANTAGONIZER
575    ALOGD("create Antagonizer");
576    mAntagonizer = new Antagonizer(notify, this);
577#endif
578}
579
580MediaPlayerService::Client::~Client()
581{
582    ALOGV("Client(%d) destructor pid = %d", mConnId, mPid);
583    mAudioOutput.clear();
584    wp<Client> client(this);
585    disconnect();
586    mService->removeClient(client);
587    if (mAudioAttributes != NULL) {
588        free(mAudioAttributes);
589    }
590}
591
592void MediaPlayerService::Client::disconnect()
593{
594    ALOGV("disconnect(%d) from pid %d", mConnId, mPid);
595    // grab local reference and clear main reference to prevent future
596    // access to object
597    sp<MediaPlayerBase> p;
598    {
599        Mutex::Autolock l(mLock);
600        p = mPlayer;
601        mClient.clear();
602    }
603
604    mPlayer.clear();
605
606    // clear the notification to prevent callbacks to dead client
607    // and reset the player. We assume the player will serialize
608    // access to itself if necessary.
609    if (p != 0) {
610        p->setNotifyCallback(0, 0);
611#if CALLBACK_ANTAGONIZER
612        ALOGD("kill Antagonizer");
613        mAntagonizer->kill();
614#endif
615        p->reset();
616    }
617
618    disconnectNativeWindow();
619
620    IPCThreadState::self()->flushCommands();
621}
622
623sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
624{
625    // determine if we have the right player type
626    sp<MediaPlayerBase> p = mPlayer;
627    if ((p != NULL) && (p->playerType() != playerType)) {
628        ALOGV("delete player");
629        p.clear();
630    }
631    if (p == NULL) {
632        p = MediaPlayerFactory::createPlayer(playerType, this, notify, mPid);
633    }
634
635    if (p != NULL) {
636        p->setUID(mUID);
637    }
638
639    return p;
640}
641
642sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
643        player_type playerType)
644{
645    ALOGV("player type = %d", playerType);
646
647    // create the right type of player
648    sp<MediaPlayerBase> p = createPlayer(playerType);
649    if (p == NULL) {
650        return p;
651    }
652
653    if (!p->hardwareOutput()) {
654        Mutex::Autolock l(mLock);
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", static_cast<uint64_t>(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
783status_t MediaPlayerService::Client::setDataSource(
784        const sp<IDataSource> &source) {
785    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
786    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
787    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
788    if (p == NULL) {
789        return NO_INIT;
790    }
791    // now set data source
792    setDataSource_post(p, p->setDataSource(dataSource));
793    return mStatus;
794}
795
796void MediaPlayerService::Client::disconnectNativeWindow() {
797    if (mConnectedWindow != NULL) {
798        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
799                NATIVE_WINDOW_API_MEDIA);
800
801        if (err != OK) {
802            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
803                    strerror(-err), err);
804        }
805    }
806    mConnectedWindow.clear();
807}
808
809status_t MediaPlayerService::Client::setVideoSurfaceTexture(
810        const sp<IGraphicBufferProducer>& bufferProducer)
811{
812    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
813    sp<MediaPlayerBase> p = getPlayer();
814    if (p == 0) return UNKNOWN_ERROR;
815
816    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
817    if (mConnectedWindowBinder == binder) {
818        return OK;
819    }
820
821    sp<ANativeWindow> anw;
822    if (bufferProducer != NULL) {
823        anw = new Surface(bufferProducer, true /* controlledByApp */);
824        status_t err = native_window_api_connect(anw.get(),
825                NATIVE_WINDOW_API_MEDIA);
826
827        if (err != OK) {
828            ALOGE("setVideoSurfaceTexture failed: %d", err);
829            // Note that we must do the reset before disconnecting from the ANW.
830            // Otherwise queue/dequeue calls could be made on the disconnected
831            // ANW, which may result in errors.
832            reset();
833
834            disconnectNativeWindow();
835
836            return err;
837        }
838    }
839
840    // Note that we must set the player's new GraphicBufferProducer before
841    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
842    // on the disconnected ANW, which may result in errors.
843    status_t err = p->setVideoSurfaceTexture(bufferProducer);
844
845    disconnectNativeWindow();
846
847    mConnectedWindow = anw;
848
849    if (err == OK) {
850        mConnectedWindowBinder = binder;
851    } else {
852        disconnectNativeWindow();
853    }
854
855    return err;
856}
857
858status_t MediaPlayerService::Client::invoke(const Parcel& request,
859                                            Parcel *reply)
860{
861    sp<MediaPlayerBase> p = getPlayer();
862    if (p == NULL) return UNKNOWN_ERROR;
863    return p->invoke(request, reply);
864}
865
866// This call doesn't need to access the native player.
867status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
868{
869    status_t status;
870    media::Metadata::Filter allow, drop;
871
872    if (unmarshallFilter(filter, &allow, &status) &&
873        unmarshallFilter(filter, &drop, &status)) {
874        Mutex::Autolock lock(mLock);
875
876        mMetadataAllow = allow;
877        mMetadataDrop = drop;
878    }
879    return status;
880}
881
882status_t MediaPlayerService::Client::getMetadata(
883        bool update_only, bool /*apply_filter*/, Parcel *reply)
884{
885    sp<MediaPlayerBase> player = getPlayer();
886    if (player == 0) return UNKNOWN_ERROR;
887
888    status_t status;
889    // Placeholder for the return code, updated by the caller.
890    reply->writeInt32(-1);
891
892    media::Metadata::Filter ids;
893
894    // We don't block notifications while we fetch the data. We clear
895    // mMetadataUpdated first so we don't lose notifications happening
896    // during the rest of this call.
897    {
898        Mutex::Autolock lock(mLock);
899        if (update_only) {
900            ids = mMetadataUpdated;
901        }
902        mMetadataUpdated.clear();
903    }
904
905    media::Metadata metadata(reply);
906
907    metadata.appendHeader();
908    status = player->getMetadata(ids, reply);
909
910    if (status != OK) {
911        metadata.resetParcel();
912        ALOGE("getMetadata failed %d", status);
913        return status;
914    }
915
916    // FIXME: Implement filtering on the result. Not critical since
917    // filtering takes place on the update notifications already. This
918    // would be when all the metadata are fetch and a filter is set.
919
920    // Everything is fine, update the metadata length.
921    metadata.updateLength();
922    return OK;
923}
924
925status_t MediaPlayerService::Client::prepareAsync()
926{
927    ALOGV("[%d] prepareAsync", mConnId);
928    sp<MediaPlayerBase> p = getPlayer();
929    if (p == 0) return UNKNOWN_ERROR;
930    status_t ret = p->prepareAsync();
931#if CALLBACK_ANTAGONIZER
932    ALOGD("start Antagonizer");
933    if (ret == NO_ERROR) mAntagonizer->start();
934#endif
935    return ret;
936}
937
938status_t MediaPlayerService::Client::start()
939{
940    ALOGV("[%d] start", mConnId);
941    sp<MediaPlayerBase> p = getPlayer();
942    if (p == 0) return UNKNOWN_ERROR;
943    p->setLooping(mLoop);
944    return p->start();
945}
946
947status_t MediaPlayerService::Client::stop()
948{
949    ALOGV("[%d] stop", mConnId);
950    sp<MediaPlayerBase> p = getPlayer();
951    if (p == 0) return UNKNOWN_ERROR;
952    return p->stop();
953}
954
955status_t MediaPlayerService::Client::pause()
956{
957    ALOGV("[%d] pause", mConnId);
958    sp<MediaPlayerBase> p = getPlayer();
959    if (p == 0) return UNKNOWN_ERROR;
960    return p->pause();
961}
962
963status_t MediaPlayerService::Client::isPlaying(bool* state)
964{
965    *state = false;
966    sp<MediaPlayerBase> p = getPlayer();
967    if (p == 0) return UNKNOWN_ERROR;
968    *state = p->isPlaying();
969    ALOGV("[%d] isPlaying: %d", mConnId, *state);
970    return NO_ERROR;
971}
972
973status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
974{
975    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
976            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
977    sp<MediaPlayerBase> p = getPlayer();
978    if (p == 0) return UNKNOWN_ERROR;
979    return p->setPlaybackSettings(rate);
980}
981
982status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
983{
984    sp<MediaPlayerBase> p = getPlayer();
985    if (p == 0) return UNKNOWN_ERROR;
986    status_t ret = p->getPlaybackSettings(rate);
987    if (ret == NO_ERROR) {
988        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
989                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
990    } else {
991        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
992    }
993    return ret;
994}
995
996status_t MediaPlayerService::Client::setSyncSettings(
997        const AVSyncSettings& sync, float videoFpsHint)
998{
999    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1000            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1001    sp<MediaPlayerBase> p = getPlayer();
1002    if (p == 0) return UNKNOWN_ERROR;
1003    return p->setSyncSettings(sync, videoFpsHint);
1004}
1005
1006status_t MediaPlayerService::Client::getSyncSettings(
1007        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1008{
1009    sp<MediaPlayerBase> p = getPlayer();
1010    if (p == 0) return UNKNOWN_ERROR;
1011    status_t ret = p->getSyncSettings(sync, videoFps);
1012    if (ret == NO_ERROR) {
1013        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1014                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1015    } else {
1016        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1017    }
1018    return ret;
1019}
1020
1021status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1022{
1023    ALOGV("getCurrentPosition");
1024    sp<MediaPlayerBase> p = getPlayer();
1025    if (p == 0) return UNKNOWN_ERROR;
1026    status_t ret = p->getCurrentPosition(msec);
1027    if (ret == NO_ERROR) {
1028        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1029    } else {
1030        ALOGE("getCurrentPosition returned %d", ret);
1031    }
1032    return ret;
1033}
1034
1035status_t MediaPlayerService::Client::getDuration(int *msec)
1036{
1037    ALOGV("getDuration");
1038    sp<MediaPlayerBase> p = getPlayer();
1039    if (p == 0) return UNKNOWN_ERROR;
1040    status_t ret = p->getDuration(msec);
1041    if (ret == NO_ERROR) {
1042        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1043    } else {
1044        ALOGE("getDuration returned %d", ret);
1045    }
1046    return ret;
1047}
1048
1049status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1050    ALOGV("setNextPlayer");
1051    Mutex::Autolock l(mLock);
1052    sp<Client> c = static_cast<Client*>(player.get());
1053    mNextClient = c;
1054
1055    if (c != NULL) {
1056        if (mAudioOutput != NULL) {
1057            mAudioOutput->setNextOutput(c->mAudioOutput);
1058        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1059            ALOGE("no current audio output");
1060        }
1061
1062        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1063            mPlayer->setNextPlayer(mNextClient->getPlayer());
1064        }
1065    }
1066
1067    return OK;
1068}
1069
1070status_t MediaPlayerService::Client::seekTo(int msec)
1071{
1072    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1073    sp<MediaPlayerBase> p = getPlayer();
1074    if (p == 0) return UNKNOWN_ERROR;
1075    return p->seekTo(msec);
1076}
1077
1078status_t MediaPlayerService::Client::reset()
1079{
1080    ALOGV("[%d] reset", mConnId);
1081    mRetransmitEndpointValid = false;
1082    sp<MediaPlayerBase> p = getPlayer();
1083    if (p == 0) return UNKNOWN_ERROR;
1084    return p->reset();
1085}
1086
1087status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1088{
1089    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1090    // TODO: for hardware output, call player instead
1091    Mutex::Autolock l(mLock);
1092    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1093    return NO_ERROR;
1094}
1095
1096status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1097{
1098    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1099    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1100    if (mAudioAttributes == NULL) {
1101        return NO_MEMORY;
1102    }
1103    unmarshallAudioAttributes(parcel, mAudioAttributes);
1104
1105    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1106            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1107            mAudioAttributes->tags);
1108
1109    if (mAudioOutput != 0) {
1110        mAudioOutput->setAudioAttributes(mAudioAttributes);
1111    }
1112    return NO_ERROR;
1113}
1114
1115status_t MediaPlayerService::Client::setLooping(int loop)
1116{
1117    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1118    mLoop = loop;
1119    sp<MediaPlayerBase> p = getPlayer();
1120    if (p != 0) return p->setLooping(loop);
1121    return NO_ERROR;
1122}
1123
1124status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1125{
1126    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1127
1128    // for hardware output, call player instead
1129    sp<MediaPlayerBase> p = getPlayer();
1130    {
1131      Mutex::Autolock l(mLock);
1132      if (p != 0 && p->hardwareOutput()) {
1133          MediaPlayerHWInterface* hwp =
1134                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1135          return hwp->setVolume(leftVolume, rightVolume);
1136      } else {
1137          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1138          return NO_ERROR;
1139      }
1140    }
1141
1142    return NO_ERROR;
1143}
1144
1145status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1146{
1147    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1148    Mutex::Autolock l(mLock);
1149    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1150    return NO_ERROR;
1151}
1152
1153status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1154{
1155    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1156    Mutex::Autolock l(mLock);
1157    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1158    return NO_ERROR;
1159}
1160
1161status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1162    ALOGV("[%d] setParameter(%d)", mConnId, key);
1163    switch (key) {
1164    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1165    {
1166        Mutex::Autolock l(mLock);
1167        return setAudioAttributes_l(request);
1168    }
1169    default:
1170        sp<MediaPlayerBase> p = getPlayer();
1171        if (p == 0) { return UNKNOWN_ERROR; }
1172        return p->setParameter(key, request);
1173    }
1174}
1175
1176status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1177    ALOGV("[%d] getParameter(%d)", mConnId, key);
1178    sp<MediaPlayerBase> p = getPlayer();
1179    if (p == 0) return UNKNOWN_ERROR;
1180    return p->getParameter(key, reply);
1181}
1182
1183status_t MediaPlayerService::Client::setRetransmitEndpoint(
1184        const struct sockaddr_in* endpoint) {
1185
1186    if (NULL != endpoint) {
1187        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1188        uint16_t p = ntohs(endpoint->sin_port);
1189        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1190                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1191    } else {
1192        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1193    }
1194
1195    sp<MediaPlayerBase> p = getPlayer();
1196
1197    // Right now, the only valid time to set a retransmit endpoint is before
1198    // player selection has been made (since the presence or absence of a
1199    // retransmit endpoint is going to determine which player is selected during
1200    // setDataSource).
1201    if (p != 0) return INVALID_OPERATION;
1202
1203    if (NULL != endpoint) {
1204        mRetransmitEndpoint = *endpoint;
1205        mRetransmitEndpointValid = true;
1206    } else {
1207        mRetransmitEndpointValid = false;
1208    }
1209
1210    return NO_ERROR;
1211}
1212
1213status_t MediaPlayerService::Client::getRetransmitEndpoint(
1214        struct sockaddr_in* endpoint)
1215{
1216    if (NULL == endpoint)
1217        return BAD_VALUE;
1218
1219    sp<MediaPlayerBase> p = getPlayer();
1220
1221    if (p != NULL)
1222        return p->getRetransmitEndpoint(endpoint);
1223
1224    if (!mRetransmitEndpointValid)
1225        return NO_INIT;
1226
1227    *endpoint = mRetransmitEndpoint;
1228
1229    return NO_ERROR;
1230}
1231
1232void MediaPlayerService::Client::notify(
1233        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1234{
1235    Client* client = static_cast<Client*>(cookie);
1236    if (client == NULL) {
1237        return;
1238    }
1239
1240    sp<IMediaPlayerClient> c;
1241    {
1242        Mutex::Autolock l(client->mLock);
1243        c = client->mClient;
1244        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1245            if (client->mAudioOutput != NULL)
1246                client->mAudioOutput->switchToNextOutput();
1247            client->mNextClient->start();
1248            client->mNextClient->mClient->notify(MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1249        }
1250    }
1251
1252    if (MEDIA_INFO == msg &&
1253        MEDIA_INFO_METADATA_UPDATE == ext1) {
1254        const media::Metadata::Type metadata_type = ext2;
1255
1256        if(client->shouldDropMetadata(metadata_type)) {
1257            return;
1258        }
1259
1260        // Update the list of metadata that have changed. getMetadata
1261        // also access mMetadataUpdated and clears it.
1262        client->addNewMetadataUpdate(metadata_type);
1263    }
1264
1265    if (c != NULL) {
1266        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1267        c->notify(msg, ext1, ext2, obj);
1268    }
1269}
1270
1271
1272bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1273{
1274    Mutex::Autolock lock(mLock);
1275
1276    if (findMetadata(mMetadataDrop, code)) {
1277        return true;
1278    }
1279
1280    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1281        return false;
1282    } else {
1283        return true;
1284    }
1285}
1286
1287
1288void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1289    Mutex::Autolock lock(mLock);
1290    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1291        mMetadataUpdated.add(metadata_type);
1292    }
1293}
1294
1295#if CALLBACK_ANTAGONIZER
1296const int Antagonizer::interval = 10000; // 10 msecs
1297
1298Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1299    mExit(false), mActive(false), mClient(client), mCb(cb)
1300{
1301    createThread(callbackThread, this);
1302}
1303
1304void Antagonizer::kill()
1305{
1306    Mutex::Autolock _l(mLock);
1307    mActive = false;
1308    mExit = true;
1309    mCondition.wait(mLock);
1310}
1311
1312int Antagonizer::callbackThread(void* user)
1313{
1314    ALOGD("Antagonizer started");
1315    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1316    while (!p->mExit) {
1317        if (p->mActive) {
1318            ALOGV("send event");
1319            p->mCb(p->mClient, 0, 0, 0);
1320        }
1321        usleep(interval);
1322    }
1323    Mutex::Autolock _l(p->mLock);
1324    p->mCondition.signal();
1325    ALOGD("Antagonizer stopped");
1326    return 0;
1327}
1328#endif
1329
1330#undef LOG_TAG
1331#define LOG_TAG "AudioSink"
1332MediaPlayerService::AudioOutput::AudioOutput(int sessionId, int uid, int pid,
1333        const audio_attributes_t* attr)
1334    : mCallback(NULL),
1335      mCallbackCookie(NULL),
1336      mCallbackData(NULL),
1337      mBytesWritten(0),
1338      mStreamType(AUDIO_STREAM_MUSIC),
1339      mLeftVolume(1.0),
1340      mRightVolume(1.0),
1341      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1342      mSampleRateHz(0),
1343      mMsecsPerFrame(0),
1344      mFrameSize(0),
1345      mSessionId(sessionId),
1346      mUid(uid),
1347      mPid(pid),
1348      mSendLevel(0.0),
1349      mAuxEffectId(0),
1350      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1351{
1352    ALOGV("AudioOutput(%d)", sessionId);
1353    if (attr != NULL) {
1354        mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1355        if (mAttributes != NULL) {
1356            memcpy(mAttributes, attr, sizeof(audio_attributes_t));
1357            mStreamType = audio_attributes_to_stream_type(attr);
1358        }
1359    } else {
1360        mAttributes = NULL;
1361    }
1362
1363    setMinBufferCount();
1364}
1365
1366MediaPlayerService::AudioOutput::~AudioOutput()
1367{
1368    close();
1369    free(mAttributes);
1370    delete mCallbackData;
1371}
1372
1373//static
1374void MediaPlayerService::AudioOutput::setMinBufferCount()
1375{
1376    char value[PROPERTY_VALUE_MAX];
1377    if (property_get("ro.kernel.qemu", value, 0)) {
1378        mIsOnEmulator = true;
1379        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1380    }
1381}
1382
1383// static
1384bool MediaPlayerService::AudioOutput::isOnEmulator()
1385{
1386    setMinBufferCount(); // benign race wrt other threads
1387    return mIsOnEmulator;
1388}
1389
1390// static
1391int MediaPlayerService::AudioOutput::getMinBufferCount()
1392{
1393    setMinBufferCount(); // benign race wrt other threads
1394    return mMinBufferCount;
1395}
1396
1397ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1398{
1399    Mutex::Autolock lock(mLock);
1400    if (mTrack == 0) return NO_INIT;
1401    return mTrack->frameCount() * mFrameSize;
1402}
1403
1404ssize_t MediaPlayerService::AudioOutput::frameCount() const
1405{
1406    Mutex::Autolock lock(mLock);
1407    if (mTrack == 0) return NO_INIT;
1408    return mTrack->frameCount();
1409}
1410
1411ssize_t MediaPlayerService::AudioOutput::channelCount() const
1412{
1413    Mutex::Autolock lock(mLock);
1414    if (mTrack == 0) return NO_INIT;
1415    return mTrack->channelCount();
1416}
1417
1418ssize_t MediaPlayerService::AudioOutput::frameSize() const
1419{
1420    Mutex::Autolock lock(mLock);
1421    if (mTrack == 0) return NO_INIT;
1422    return mFrameSize;
1423}
1424
1425uint32_t MediaPlayerService::AudioOutput::latency () const
1426{
1427    Mutex::Autolock lock(mLock);
1428    if (mTrack == 0) return 0;
1429    return mTrack->latency();
1430}
1431
1432float MediaPlayerService::AudioOutput::msecsPerFrame() const
1433{
1434    Mutex::Autolock lock(mLock);
1435    return mMsecsPerFrame;
1436}
1437
1438status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1439{
1440    Mutex::Autolock lock(mLock);
1441    if (mTrack == 0) return NO_INIT;
1442    return mTrack->getPosition(position);
1443}
1444
1445status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1446{
1447    Mutex::Autolock lock(mLock);
1448    if (mTrack == 0) return NO_INIT;
1449    return mTrack->getTimestamp(ts);
1450}
1451
1452status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1453{
1454    Mutex::Autolock lock(mLock);
1455    if (mTrack == 0) return NO_INIT;
1456    *frameswritten = mBytesWritten / mFrameSize;
1457    return OK;
1458}
1459
1460status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1461{
1462    Mutex::Autolock lock(mLock);
1463    if (mTrack == 0) return NO_INIT;
1464    return mTrack->setParameters(keyValuePairs);
1465}
1466
1467String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1468{
1469    Mutex::Autolock lock(mLock);
1470    if (mTrack == 0) return String8::empty();
1471    return mTrack->getParameters(keys);
1472}
1473
1474void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1475    Mutex::Autolock lock(mLock);
1476    if (attributes == NULL) {
1477        free(mAttributes);
1478        mAttributes = NULL;
1479    } else {
1480        if (mAttributes == NULL) {
1481            mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1482        }
1483        memcpy(mAttributes, attributes, sizeof(audio_attributes_t));
1484        mStreamType = audio_attributes_to_stream_type(attributes);
1485    }
1486}
1487
1488void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1489{
1490    Mutex::Autolock lock(mLock);
1491    // do not allow direct stream type modification if attributes have been set
1492    if (mAttributes == NULL) {
1493        mStreamType = streamType;
1494    }
1495}
1496
1497void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1498{
1499    ALOGV("deleteRecycledTrack_l");
1500    if (mRecycledTrack != 0) {
1501
1502        if (mCallbackData != NULL) {
1503            mCallbackData->setOutput(NULL);
1504            mCallbackData->endTrackSwitch();
1505        }
1506
1507        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1508            mRecycledTrack->flush();
1509        }
1510        // An offloaded track isn't flushed because the STREAM_END is reported
1511        // slightly prematurely to allow time for the gapless track switch
1512        // but this means that if we decide not to recycle the track there
1513        // could be a small amount of residual data still playing. We leave
1514        // AudioFlinger to drain the track.
1515
1516        mRecycledTrack.clear();
1517        close_l();
1518        delete mCallbackData;
1519        mCallbackData = NULL;
1520    }
1521}
1522
1523void MediaPlayerService::AudioOutput::close_l()
1524{
1525    mTrack.clear();
1526}
1527
1528status_t MediaPlayerService::AudioOutput::open(
1529        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1530        audio_format_t format, int bufferCount,
1531        AudioCallback cb, void *cookie,
1532        audio_output_flags_t flags,
1533        const audio_offload_info_t *offloadInfo,
1534        bool doNotReconnect,
1535        uint32_t suggestedFrameCount)
1536{
1537    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1538                format, bufferCount, mSessionId, flags);
1539
1540    // offloading is only supported in callback mode for now.
1541    // offloadInfo must be present if offload flag is set
1542    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1543            ((cb == NULL) || (offloadInfo == NULL))) {
1544        return BAD_VALUE;
1545    }
1546
1547    // compute frame count for the AudioTrack internal buffer
1548    size_t frameCount;
1549    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1550        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1551    } else {
1552        // try to estimate the buffer processing fetch size from AudioFlinger.
1553        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1554        uint32_t afSampleRate;
1555        size_t afFrameCount;
1556        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1557            return NO_INIT;
1558        }
1559        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1560            return NO_INIT;
1561        }
1562        const size_t framesPerBuffer =
1563                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1564
1565        if (bufferCount == 0) {
1566            // use suggestedFrameCount
1567            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1568        }
1569        // Check argument bufferCount against the mininum buffer count
1570        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1571            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1572            bufferCount = mMinBufferCount;
1573        }
1574        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1575        // which will be the minimum size permitted.
1576        frameCount = bufferCount * framesPerBuffer;
1577    }
1578
1579    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1580        channelMask = audio_channel_out_mask_from_count(channelCount);
1581        if (0 == channelMask) {
1582            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1583            return NO_INIT;
1584        }
1585    }
1586
1587    Mutex::Autolock lock(mLock);
1588    mCallback = cb;
1589    mCallbackCookie = cookie;
1590
1591    // Check whether we can recycle the track
1592    bool reuse = false;
1593    bool bothOffloaded = false;
1594
1595    if (mRecycledTrack != 0) {
1596        // check whether we are switching between two offloaded tracks
1597        bothOffloaded = (flags & mRecycledTrack->getFlags()
1598                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1599
1600        // check if the existing track can be reused as-is, or if a new track needs to be created.
1601        reuse = true;
1602
1603        if ((mCallbackData == NULL && mCallback != NULL) ||
1604                (mCallbackData != NULL && mCallback == NULL)) {
1605            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1606            ALOGV("can't chain callback and write");
1607            reuse = false;
1608        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1609                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1610            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1611                  mRecycledTrack->getSampleRate(), sampleRate,
1612                  mRecycledTrack->channelCount(), channelCount);
1613            reuse = false;
1614        } else if (flags != mFlags) {
1615            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1616            reuse = false;
1617        } else if (mRecycledTrack->format() != format) {
1618            reuse = false;
1619        }
1620    } else {
1621        ALOGV("no track available to recycle");
1622    }
1623
1624    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1625
1626    // If we can't recycle and both tracks are offloaded
1627    // we must close the previous output before opening a new one
1628    if (bothOffloaded && !reuse) {
1629        ALOGV("both offloaded and not recycling");
1630        deleteRecycledTrack_l();
1631    }
1632
1633    sp<AudioTrack> t;
1634    CallbackData *newcbd = NULL;
1635
1636    // We don't attempt to create a new track if we are recycling an
1637    // offloaded track. But, if we are recycling a non-offloaded or we
1638    // are switching where one is offloaded and one isn't then we create
1639    // the new track in advance so that we can read additional stream info
1640
1641    if (!(reuse && bothOffloaded)) {
1642        ALOGV("creating new AudioTrack");
1643
1644        if (mCallback != NULL) {
1645            newcbd = new CallbackData(this);
1646            t = new AudioTrack(
1647                    mStreamType,
1648                    sampleRate,
1649                    format,
1650                    channelMask,
1651                    frameCount,
1652                    flags,
1653                    CallbackWrapper,
1654                    newcbd,
1655                    0,  // notification frames
1656                    mSessionId,
1657                    AudioTrack::TRANSFER_CALLBACK,
1658                    offloadInfo,
1659                    mUid,
1660                    mPid,
1661                    mAttributes,
1662                    doNotReconnect);
1663        } else {
1664            t = new AudioTrack(
1665                    mStreamType,
1666                    sampleRate,
1667                    format,
1668                    channelMask,
1669                    frameCount,
1670                    flags,
1671                    NULL, // callback
1672                    NULL, // user data
1673                    0, // notification frames
1674                    mSessionId,
1675                    AudioTrack::TRANSFER_DEFAULT,
1676                    NULL, // offload info
1677                    mUid,
1678                    mPid,
1679                    mAttributes,
1680                    doNotReconnect);
1681        }
1682
1683        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1684            ALOGE("Unable to create audio track");
1685            delete newcbd;
1686            // t goes out of scope, so reference count drops to zero
1687            return NO_INIT;
1688        } else {
1689            // successful AudioTrack initialization implies a legacy stream type was generated
1690            // from the audio attributes
1691            mStreamType = t->streamType();
1692        }
1693    }
1694
1695    if (reuse) {
1696        CHECK(mRecycledTrack != NULL);
1697
1698        if (!bothOffloaded) {
1699            if (mRecycledTrack->frameCount() != t->frameCount()) {
1700                ALOGV("framecount differs: %u/%u frames",
1701                      mRecycledTrack->frameCount(), t->frameCount());
1702                reuse = false;
1703            }
1704        }
1705
1706        if (reuse) {
1707            ALOGV("chaining to next output and recycling track");
1708            close_l();
1709            mTrack = mRecycledTrack;
1710            mRecycledTrack.clear();
1711            if (mCallbackData != NULL) {
1712                mCallbackData->setOutput(this);
1713            }
1714            delete newcbd;
1715            return OK;
1716        }
1717    }
1718
1719    // we're not going to reuse the track, unblock and flush it
1720    // this was done earlier if both tracks are offloaded
1721    if (!bothOffloaded) {
1722        deleteRecycledTrack_l();
1723    }
1724
1725    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1726
1727    mCallbackData = newcbd;
1728    ALOGV("setVolume");
1729    t->setVolume(mLeftVolume, mRightVolume);
1730
1731    mSampleRateHz = sampleRate;
1732    mFlags = flags;
1733    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1734    mFrameSize = t->frameSize();
1735    uint32_t pos;
1736    if (t->getPosition(&pos) == OK) {
1737        mBytesWritten = uint64_t(pos) * mFrameSize;
1738    }
1739    mTrack = t;
1740
1741    status_t res = NO_ERROR;
1742    // Note some output devices may give us a direct track even though we don't specify it.
1743    // Example: Line application b/17459982.
1744    if ((t->getFlags() & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1745        res = t->setPlaybackRate(mPlaybackRate);
1746        if (res == NO_ERROR) {
1747            t->setAuxEffectSendLevel(mSendLevel);
1748            res = t->attachAuxEffect(mAuxEffectId);
1749        }
1750    }
1751    ALOGV("open() DONE status %d", res);
1752    return res;
1753}
1754
1755status_t MediaPlayerService::AudioOutput::start()
1756{
1757    ALOGV("start");
1758    Mutex::Autolock lock(mLock);
1759    if (mCallbackData != NULL) {
1760        mCallbackData->endTrackSwitch();
1761    }
1762    if (mTrack != 0) {
1763        mTrack->setVolume(mLeftVolume, mRightVolume);
1764        mTrack->setAuxEffectSendLevel(mSendLevel);
1765        return mTrack->start();
1766    }
1767    return NO_INIT;
1768}
1769
1770void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1771    Mutex::Autolock lock(mLock);
1772    mNextOutput = nextOutput;
1773}
1774
1775void MediaPlayerService::AudioOutput::switchToNextOutput() {
1776    ALOGV("switchToNextOutput");
1777
1778    // Try to acquire the callback lock before moving track (without incurring deadlock).
1779    const unsigned kMaxSwitchTries = 100;
1780    Mutex::Autolock lock(mLock);
1781    for (unsigned tries = 0;;) {
1782        if (mTrack == 0) {
1783            return;
1784        }
1785        if (mNextOutput != NULL && mNextOutput != this) {
1786            if (mCallbackData != NULL) {
1787                // two alternative approaches
1788#if 1
1789                CallbackData *callbackData = mCallbackData;
1790                mLock.unlock();
1791                // proper acquisition sequence
1792                callbackData->lock();
1793                mLock.lock();
1794                // Caution: it is unlikely that someone deleted our callback or changed our target
1795                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1796                    // fatal if we are starved out.
1797                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1798                            "switchToNextOutput() cannot obtain correct lock sequence");
1799                    callbackData->unlock();
1800                    continue;
1801                }
1802                callbackData->mSwitching = true; // begin track switch
1803#else
1804                // tryBeginTrackSwitch() returns false if the callback has the lock.
1805                if (!mCallbackData->tryBeginTrackSwitch()) {
1806                    // fatal if we are starved out.
1807                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1808                            "switchToNextOutput() cannot obtain callback lock");
1809                    mLock.unlock();
1810                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1811                    mLock.lock();
1812                    continue;
1813                }
1814#endif
1815            }
1816
1817            Mutex::Autolock nextLock(mNextOutput->mLock);
1818
1819            // If the next output track is not NULL, then it has been
1820            // opened already for playback.
1821            // This is possible even without the next player being started,
1822            // for example, the next player could be prepared and seeked.
1823            //
1824            // Presuming it isn't advisable to force the track over.
1825             if (mNextOutput->mTrack == NULL) {
1826                ALOGD("Recycling track for gapless playback");
1827                delete mNextOutput->mCallbackData;
1828                mNextOutput->mCallbackData = mCallbackData;
1829                mNextOutput->mRecycledTrack = mTrack;
1830                mNextOutput->mSampleRateHz = mSampleRateHz;
1831                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1832                mNextOutput->mBytesWritten = mBytesWritten;
1833                mNextOutput->mFlags = mFlags;
1834                mNextOutput->mFrameSize = mFrameSize;
1835                close_l();
1836                mCallbackData = NULL;  // destruction handled by mNextOutput
1837            } else {
1838                ALOGW("Ignoring gapless playback because next player has already started");
1839                // remove track in case resource needed for future players.
1840                if (mCallbackData != NULL) {
1841                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1842                }
1843                close_l();
1844            }
1845        }
1846        break;
1847    }
1848}
1849
1850ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1851{
1852    Mutex::Autolock lock(mLock);
1853    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1854
1855    //ALOGV("write(%p, %u)", buffer, size);
1856    if (mTrack != 0) {
1857        ssize_t ret = mTrack->write(buffer, size, blocking);
1858        if (ret >= 0) {
1859            mBytesWritten += ret;
1860        }
1861        return ret;
1862    }
1863    return NO_INIT;
1864}
1865
1866void MediaPlayerService::AudioOutput::stop()
1867{
1868    ALOGV("stop");
1869    Mutex::Autolock lock(mLock);
1870    mBytesWritten = 0;
1871    if (mTrack != 0) mTrack->stop();
1872}
1873
1874void MediaPlayerService::AudioOutput::flush()
1875{
1876    ALOGV("flush");
1877    Mutex::Autolock lock(mLock);
1878    mBytesWritten = 0;
1879    if (mTrack != 0) mTrack->flush();
1880}
1881
1882void MediaPlayerService::AudioOutput::pause()
1883{
1884    ALOGV("pause");
1885    Mutex::Autolock lock(mLock);
1886    if (mTrack != 0) mTrack->pause();
1887}
1888
1889void MediaPlayerService::AudioOutput::close()
1890{
1891    ALOGV("close");
1892    sp<AudioTrack> track;
1893    {
1894        Mutex::Autolock lock(mLock);
1895        track = mTrack;
1896        close_l(); // clears mTrack
1897    }
1898    // destruction of the track occurs outside of mutex.
1899}
1900
1901void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1902{
1903    ALOGV("setVolume(%f, %f)", left, right);
1904    Mutex::Autolock lock(mLock);
1905    mLeftVolume = left;
1906    mRightVolume = right;
1907    if (mTrack != 0) {
1908        mTrack->setVolume(left, right);
1909    }
1910}
1911
1912status_t MediaPlayerService::AudioOutput::setPlaybackRate(const AudioPlaybackRate &rate)
1913{
1914    ALOGV("setPlaybackRate(%f %f %d %d)",
1915                rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
1916    Mutex::Autolock lock(mLock);
1917    if (mTrack == 0) {
1918        // remember rate so that we can set it when the track is opened
1919        mPlaybackRate = rate;
1920        return OK;
1921    }
1922    status_t res = mTrack->setPlaybackRate(rate);
1923    if (res != NO_ERROR) {
1924        return res;
1925    }
1926    // rate.mSpeed is always greater than 0 if setPlaybackRate succeeded
1927    CHECK_GT(rate.mSpeed, 0.f);
1928    mPlaybackRate = rate;
1929    if (mSampleRateHz != 0) {
1930        mMsecsPerFrame = 1E3f / (rate.mSpeed * mSampleRateHz);
1931    }
1932    return res;
1933}
1934
1935status_t MediaPlayerService::AudioOutput::getPlaybackRate(AudioPlaybackRate *rate)
1936{
1937    ALOGV("setPlaybackRate");
1938    Mutex::Autolock lock(mLock);
1939    if (mTrack == 0) {
1940        return NO_INIT;
1941    }
1942    *rate = mTrack->getPlaybackRate();
1943    return NO_ERROR;
1944}
1945
1946status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
1947{
1948    ALOGV("setAuxEffectSendLevel(%f)", level);
1949    Mutex::Autolock lock(mLock);
1950    mSendLevel = level;
1951    if (mTrack != 0) {
1952        return mTrack->setAuxEffectSendLevel(level);
1953    }
1954    return NO_ERROR;
1955}
1956
1957status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
1958{
1959    ALOGV("attachAuxEffect(%d)", effectId);
1960    Mutex::Autolock lock(mLock);
1961    mAuxEffectId = effectId;
1962    if (mTrack != 0) {
1963        return mTrack->attachAuxEffect(effectId);
1964    }
1965    return NO_ERROR;
1966}
1967
1968// static
1969void MediaPlayerService::AudioOutput::CallbackWrapper(
1970        int event, void *cookie, void *info) {
1971    //ALOGV("callbackwrapper");
1972    CallbackData *data = (CallbackData*)cookie;
1973    // lock to ensure we aren't caught in the middle of a track switch.
1974    data->lock();
1975    AudioOutput *me = data->getOutput();
1976    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1977    if (me == NULL) {
1978        // no output set, likely because the track was scheduled to be reused
1979        // by another player, but the format turned out to be incompatible.
1980        data->unlock();
1981        if (buffer != NULL) {
1982            buffer->size = 0;
1983        }
1984        return;
1985    }
1986
1987    switch(event) {
1988    case AudioTrack::EVENT_MORE_DATA: {
1989        size_t actualSize = (*me->mCallback)(
1990                me, buffer->raw, buffer->size, me->mCallbackCookie,
1991                CB_EVENT_FILL_BUFFER);
1992
1993        // Log when no data is returned from the callback.
1994        // (1) We may have no data (especially with network streaming sources).
1995        // (2) We may have reached the EOS and the audio track is not stopped yet.
1996        // Note that AwesomePlayer/AudioPlayer will only return zero size when it reaches the EOS.
1997        // NuPlayerRenderer will return zero when it doesn't have data (it doesn't block to fill).
1998        //
1999        // This is a benign busy-wait, with the next data request generated 10 ms or more later;
2000        // nevertheless for power reasons, we don't want to see too many of these.
2001
2002        ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
2003
2004        me->mBytesWritten += actualSize;  // benign race with reader.
2005        buffer->size = actualSize;
2006        } break;
2007
2008    case AudioTrack::EVENT_STREAM_END:
2009        // currently only occurs for offloaded callbacks
2010        ALOGV("callbackwrapper: deliver EVENT_STREAM_END");
2011        (*me->mCallback)(me, NULL /* buffer */, 0 /* size */,
2012                me->mCallbackCookie, CB_EVENT_STREAM_END);
2013        break;
2014
2015    case AudioTrack::EVENT_NEW_IAUDIOTRACK :
2016        ALOGV("callbackwrapper: deliver EVENT_TEAR_DOWN");
2017        (*me->mCallback)(me,  NULL /* buffer */, 0 /* size */,
2018                me->mCallbackCookie, CB_EVENT_TEAR_DOWN);
2019        break;
2020
2021    case AudioTrack::EVENT_UNDERRUN:
2022        // This occurs when there is no data available, typically
2023        // when there is a failure to supply data to the AudioTrack.  It can also
2024        // occur in non-offloaded mode when the audio device comes out of standby.
2025        //
2026        // If an AudioTrack underruns it outputs silence. Since this happens suddenly
2027        // it may sound like an audible pop or glitch.
2028        //
2029        // The underrun event is sent once per track underrun; the condition is reset
2030        // when more data is sent to the AudioTrack.
2031        ALOGI("callbackwrapper: EVENT_UNDERRUN (discarded)");
2032        break;
2033
2034    default:
2035        ALOGE("received unknown event type: %d inside CallbackWrapper !", event);
2036    }
2037
2038    data->unlock();
2039}
2040
2041int MediaPlayerService::AudioOutput::getSessionId() const
2042{
2043    Mutex::Autolock lock(mLock);
2044    return mSessionId;
2045}
2046
2047uint32_t MediaPlayerService::AudioOutput::getSampleRate() const
2048{
2049    Mutex::Autolock lock(mLock);
2050    if (mTrack == 0) return 0;
2051    return mTrack->getSampleRate();
2052}
2053
2054////////////////////////////////////////////////////////////////////////////////
2055
2056struct CallbackThread : public Thread {
2057    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
2058                   MediaPlayerBase::AudioSink::AudioCallback cb,
2059                   void *cookie);
2060
2061protected:
2062    virtual ~CallbackThread();
2063
2064    virtual bool threadLoop();
2065
2066private:
2067    wp<MediaPlayerBase::AudioSink> mSink;
2068    MediaPlayerBase::AudioSink::AudioCallback mCallback;
2069    void *mCookie;
2070    void *mBuffer;
2071    size_t mBufferSize;
2072
2073    CallbackThread(const CallbackThread &);
2074    CallbackThread &operator=(const CallbackThread &);
2075};
2076
2077CallbackThread::CallbackThread(
2078        const wp<MediaPlayerBase::AudioSink> &sink,
2079        MediaPlayerBase::AudioSink::AudioCallback cb,
2080        void *cookie)
2081    : mSink(sink),
2082      mCallback(cb),
2083      mCookie(cookie),
2084      mBuffer(NULL),
2085      mBufferSize(0) {
2086}
2087
2088CallbackThread::~CallbackThread() {
2089    if (mBuffer) {
2090        free(mBuffer);
2091        mBuffer = NULL;
2092    }
2093}
2094
2095bool CallbackThread::threadLoop() {
2096    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
2097    if (sink == NULL) {
2098        return false;
2099    }
2100
2101    if (mBuffer == NULL) {
2102        mBufferSize = sink->bufferSize();
2103        mBuffer = malloc(mBufferSize);
2104    }
2105
2106    size_t actualSize =
2107        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie,
2108                MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER);
2109
2110    if (actualSize > 0) {
2111        sink->write(mBuffer, actualSize);
2112        // Could return false on sink->write() error or short count.
2113        // Not necessarily appropriate but would work for AudioCache behavior.
2114    }
2115
2116    return true;
2117}
2118
2119////////////////////////////////////////////////////////////////////////////////
2120
2121void MediaPlayerService::addBatteryData(uint32_t params)
2122{
2123    Mutex::Autolock lock(mLock);
2124
2125    int32_t time = systemTime() / 1000000L;
2126
2127    // change audio output devices. This notification comes from AudioFlinger
2128    if ((params & kBatteryDataSpeakerOn)
2129            || (params & kBatteryDataOtherAudioDeviceOn)) {
2130
2131        int deviceOn[NUM_AUDIO_DEVICES];
2132        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2133            deviceOn[i] = 0;
2134        }
2135
2136        if ((params & kBatteryDataSpeakerOn)
2137                && (params & kBatteryDataOtherAudioDeviceOn)) {
2138            deviceOn[SPEAKER_AND_OTHER] = 1;
2139        } else if (params & kBatteryDataSpeakerOn) {
2140            deviceOn[SPEAKER] = 1;
2141        } else {
2142            deviceOn[OTHER_AUDIO_DEVICE] = 1;
2143        }
2144
2145        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2146            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
2147
2148                if (mBatteryAudio.refCount > 0) { // if playing audio
2149                    if (!deviceOn[i]) {
2150                        mBatteryAudio.lastTime[i] += time;
2151                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2152                        mBatteryAudio.lastTime[i] = 0;
2153                    } else {
2154                        mBatteryAudio.lastTime[i] = 0 - time;
2155                    }
2156                }
2157
2158                mBatteryAudio.deviceOn[i] = deviceOn[i];
2159            }
2160        }
2161        return;
2162    }
2163
2164    // an audio stream is started
2165    if (params & kBatteryDataAudioFlingerStart) {
2166        // record the start time only if currently no other audio
2167        // is being played
2168        if (mBatteryAudio.refCount == 0) {
2169            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2170                if (mBatteryAudio.deviceOn[i]) {
2171                    mBatteryAudio.lastTime[i] -= time;
2172                }
2173            }
2174        }
2175
2176        mBatteryAudio.refCount ++;
2177        return;
2178
2179    } else if (params & kBatteryDataAudioFlingerStop) {
2180        if (mBatteryAudio.refCount <= 0) {
2181            ALOGW("Battery track warning: refCount is <= 0");
2182            return;
2183        }
2184
2185        // record the stop time only if currently this is the only
2186        // audio being played
2187        if (mBatteryAudio.refCount == 1) {
2188            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2189                if (mBatteryAudio.deviceOn[i]) {
2190                    mBatteryAudio.lastTime[i] += time;
2191                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
2192                    mBatteryAudio.lastTime[i] = 0;
2193                }
2194            }
2195        }
2196
2197        mBatteryAudio.refCount --;
2198        return;
2199    }
2200
2201    int uid = IPCThreadState::self()->getCallingUid();
2202    if (uid == AID_MEDIA) {
2203        return;
2204    }
2205    int index = mBatteryData.indexOfKey(uid);
2206
2207    if (index < 0) { // create a new entry for this UID
2208        BatteryUsageInfo info;
2209        info.audioTotalTime = 0;
2210        info.videoTotalTime = 0;
2211        info.audioLastTime = 0;
2212        info.videoLastTime = 0;
2213        info.refCount = 0;
2214
2215        if (mBatteryData.add(uid, info) == NO_MEMORY) {
2216            ALOGE("Battery track error: no memory for new app");
2217            return;
2218        }
2219    }
2220
2221    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
2222
2223    if (params & kBatteryDataCodecStarted) {
2224        if (params & kBatteryDataTrackAudio) {
2225            info.audioLastTime -= time;
2226            info.refCount ++;
2227        }
2228        if (params & kBatteryDataTrackVideo) {
2229            info.videoLastTime -= time;
2230            info.refCount ++;
2231        }
2232    } else {
2233        if (info.refCount == 0) {
2234            ALOGW("Battery track warning: refCount is already 0");
2235            return;
2236        } else if (info.refCount < 0) {
2237            ALOGE("Battery track error: refCount < 0");
2238            mBatteryData.removeItem(uid);
2239            return;
2240        }
2241
2242        if (params & kBatteryDataTrackAudio) {
2243            info.audioLastTime += time;
2244            info.refCount --;
2245        }
2246        if (params & kBatteryDataTrackVideo) {
2247            info.videoLastTime += time;
2248            info.refCount --;
2249        }
2250
2251        // no stream is being played by this UID
2252        if (info.refCount == 0) {
2253            info.audioTotalTime += info.audioLastTime;
2254            info.audioLastTime = 0;
2255            info.videoTotalTime += info.videoLastTime;
2256            info.videoLastTime = 0;
2257        }
2258    }
2259}
2260
2261status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
2262    Mutex::Autolock lock(mLock);
2263
2264    // audio output devices usage
2265    int32_t time = systemTime() / 1000000L; //in ms
2266    int32_t totalTime;
2267
2268    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
2269        totalTime = mBatteryAudio.totalTime[i];
2270
2271        if (mBatteryAudio.deviceOn[i]
2272            && (mBatteryAudio.lastTime[i] != 0)) {
2273                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
2274                totalTime += tmpTime;
2275        }
2276
2277        reply->writeInt32(totalTime);
2278        // reset the total time
2279        mBatteryAudio.totalTime[i] = 0;
2280   }
2281
2282    // codec usage
2283    BatteryUsageInfo info;
2284    int size = mBatteryData.size();
2285
2286    reply->writeInt32(size);
2287    int i = 0;
2288
2289    while (i < size) {
2290        info = mBatteryData.valueAt(i);
2291
2292        reply->writeInt32(mBatteryData.keyAt(i)); //UID
2293        reply->writeInt32(info.audioTotalTime);
2294        reply->writeInt32(info.videoTotalTime);
2295
2296        info.audioTotalTime = 0;
2297        info.videoTotalTime = 0;
2298
2299        // remove the UID entry where no stream is being played
2300        if (info.refCount <= 0) {
2301            mBatteryData.removeItemsAt(i);
2302            size --;
2303            i --;
2304        }
2305        i++;
2306    }
2307    return NO_ERROR;
2308}
2309} // namespace android
2310