MediaPlayerService.cpp revision 2650e9661ea1608dfb6b58bc640a66cdbbb6ae58 
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, mPid);
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        Mutex::Autolock l(mLock);
659        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
660                mPid, mAudioAttributes);
661        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
662    }
663
664    return p;
665}
666
667void MediaPlayerService::Client::setDataSource_post(
668        const sp<MediaPlayerBase>& p,
669        status_t status)
670{
671    ALOGV(" setDataSource");
672    mStatus = status;
673    if (mStatus != OK) {
674        ALOGE("  error: %d", mStatus);
675        return;
676    }
677
678    // Set the re-transmission endpoint if one was chosen.
679    if (mRetransmitEndpointValid) {
680        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
681        if (mStatus != NO_ERROR) {
682            ALOGE("setRetransmitEndpoint error: %d", mStatus);
683        }
684    }
685
686    if (mStatus == OK) {
687        mPlayer = p;
688    }
689}
690
691status_t MediaPlayerService::Client::setDataSource(
692        const sp<IMediaHTTPService> &httpService,
693        const char *url,
694        const KeyedVector<String8, String8> *headers)
695{
696    ALOGV("setDataSource(%s)", url);
697    if (url == NULL)
698        return UNKNOWN_ERROR;
699
700    if ((strncmp(url, "http://", 7) == 0) ||
701        (strncmp(url, "https://", 8) == 0) ||
702        (strncmp(url, "rtsp://", 7) == 0)) {
703        if (!checkPermission("android.permission.INTERNET")) {
704            return PERMISSION_DENIED;
705        }
706    }
707
708    if (strncmp(url, "content://", 10) == 0) {
709        // get a filedescriptor for the content Uri and
710        // pass it to the setDataSource(fd) method
711
712        String16 url16(url);
713        int fd = android::openContentProviderFile(url16);
714        if (fd < 0)
715        {
716            ALOGE("Couldn't open fd for %s", url);
717            return UNKNOWN_ERROR;
718        }
719        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
720        close(fd);
721        return mStatus;
722    } else {
723        player_type playerType = MediaPlayerFactory::getPlayerType(this, url);
724        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
725        if (p == NULL) {
726            return NO_INIT;
727        }
728
729        setDataSource_post(p, p->setDataSource(httpService, url, headers));
730        return mStatus;
731    }
732}
733
734status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
735{
736    ALOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
737    struct stat sb;
738    int ret = fstat(fd, &sb);
739    if (ret != 0) {
740        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
741        return UNKNOWN_ERROR;
742    }
743
744    ALOGV("st_dev  = %llu", static_cast<uint64_t>(sb.st_dev));
745    ALOGV("st_mode = %u", sb.st_mode);
746    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
747    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
748    ALOGV("st_size = %llu", sb.st_size);
749
750    if (offset >= sb.st_size) {
751        ALOGE("offset error");
752        ::close(fd);
753        return UNKNOWN_ERROR;
754    }
755    if (offset + length > sb.st_size) {
756        length = sb.st_size - offset;
757        ALOGV("calculated length = %lld", length);
758    }
759
760    player_type playerType = MediaPlayerFactory::getPlayerType(this,
761                                                               fd,
762                                                               offset,
763                                                               length);
764    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
765    if (p == NULL) {
766        return NO_INIT;
767    }
768
769    // now set data source
770    setDataSource_post(p, p->setDataSource(fd, offset, length));
771    return mStatus;
772}
773
774status_t MediaPlayerService::Client::setDataSource(
775        const sp<IStreamSource> &source) {
776    // create the right type of player
777    player_type playerType = MediaPlayerFactory::getPlayerType(this, source);
778    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
779    if (p == NULL) {
780        return NO_INIT;
781    }
782
783    // now set data source
784    setDataSource_post(p, p->setDataSource(source));
785    return mStatus;
786}
787
788status_t MediaPlayerService::Client::setDataSource(
789        const sp<IDataSource> &source) {
790    sp<DataSource> dataSource = DataSource::CreateFromIDataSource(source);
791    player_type playerType = MediaPlayerFactory::getPlayerType(this, dataSource);
792    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
793    if (p == NULL) {
794        return NO_INIT;
795    }
796    // now set data source
797    setDataSource_post(p, p->setDataSource(dataSource));
798    return mStatus;
799}
800
801void MediaPlayerService::Client::disconnectNativeWindow() {
802    if (mConnectedWindow != NULL) {
803        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
804                NATIVE_WINDOW_API_MEDIA);
805
806        if (err != OK) {
807            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
808                    strerror(-err), err);
809        }
810    }
811    mConnectedWindow.clear();
812}
813
814status_t MediaPlayerService::Client::setVideoSurfaceTexture(
815        const sp<IGraphicBufferProducer>& bufferProducer)
816{
817    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, bufferProducer.get());
818    sp<MediaPlayerBase> p = getPlayer();
819    if (p == 0) return UNKNOWN_ERROR;
820
821    sp<IBinder> binder(IInterface::asBinder(bufferProducer));
822    if (mConnectedWindowBinder == binder) {
823        return OK;
824    }
825
826    sp<ANativeWindow> anw;
827    if (bufferProducer != NULL) {
828        anw = new Surface(bufferProducer, true /* controlledByApp */);
829        status_t err = native_window_api_connect(anw.get(),
830                NATIVE_WINDOW_API_MEDIA);
831
832        if (err != OK) {
833            ALOGE("setVideoSurfaceTexture failed: %d", err);
834            // Note that we must do the reset before disconnecting from the ANW.
835            // Otherwise queue/dequeue calls could be made on the disconnected
836            // ANW, which may result in errors.
837            reset();
838
839            disconnectNativeWindow();
840
841            return err;
842        }
843    }
844
845    // Note that we must set the player's new GraphicBufferProducer before
846    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
847    // on the disconnected ANW, which may result in errors.
848    status_t err = p->setVideoSurfaceTexture(bufferProducer);
849
850    disconnectNativeWindow();
851
852    mConnectedWindow = anw;
853
854    if (err == OK) {
855        mConnectedWindowBinder = binder;
856    } else {
857        disconnectNativeWindow();
858    }
859
860    return err;
861}
862
863status_t MediaPlayerService::Client::invoke(const Parcel& request,
864                                            Parcel *reply)
865{
866    sp<MediaPlayerBase> p = getPlayer();
867    if (p == NULL) return UNKNOWN_ERROR;
868    return p->invoke(request, reply);
869}
870
871// This call doesn't need to access the native player.
872status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
873{
874    status_t status;
875    media::Metadata::Filter allow, drop;
876
877    if (unmarshallFilter(filter, &allow, &status) &&
878        unmarshallFilter(filter, &drop, &status)) {
879        Mutex::Autolock lock(mLock);
880
881        mMetadataAllow = allow;
882        mMetadataDrop = drop;
883    }
884    return status;
885}
886
887status_t MediaPlayerService::Client::getMetadata(
888        bool update_only, bool /*apply_filter*/, Parcel *reply)
889{
890    sp<MediaPlayerBase> player = getPlayer();
891    if (player == 0) return UNKNOWN_ERROR;
892
893    status_t status;
894    // Placeholder for the return code, updated by the caller.
895    reply->writeInt32(-1);
896
897    media::Metadata::Filter ids;
898
899    // We don't block notifications while we fetch the data. We clear
900    // mMetadataUpdated first so we don't lose notifications happening
901    // during the rest of this call.
902    {
903        Mutex::Autolock lock(mLock);
904        if (update_only) {
905            ids = mMetadataUpdated;
906        }
907        mMetadataUpdated.clear();
908    }
909
910    media::Metadata metadata(reply);
911
912    metadata.appendHeader();
913    status = player->getMetadata(ids, reply);
914
915    if (status != OK) {
916        metadata.resetParcel();
917        ALOGE("getMetadata failed %d", status);
918        return status;
919    }
920
921    // FIXME: Implement filtering on the result. Not critical since
922    // filtering takes place on the update notifications already. This
923    // would be when all the metadata are fetch and a filter is set.
924
925    // Everything is fine, update the metadata length.
926    metadata.updateLength();
927    return OK;
928}
929
930status_t MediaPlayerService::Client::prepareAsync()
931{
932    ALOGV("[%d] prepareAsync", mConnId);
933    sp<MediaPlayerBase> p = getPlayer();
934    if (p == 0) return UNKNOWN_ERROR;
935    status_t ret = p->prepareAsync();
936#if CALLBACK_ANTAGONIZER
937    ALOGD("start Antagonizer");
938    if (ret == NO_ERROR) mAntagonizer->start();
939#endif
940    return ret;
941}
942
943status_t MediaPlayerService::Client::start()
944{
945    ALOGV("[%d] start", mConnId);
946    sp<MediaPlayerBase> p = getPlayer();
947    if (p == 0) return UNKNOWN_ERROR;
948    p->setLooping(mLoop);
949    return p->start();
950}
951
952status_t MediaPlayerService::Client::stop()
953{
954    ALOGV("[%d] stop", mConnId);
955    sp<MediaPlayerBase> p = getPlayer();
956    if (p == 0) return UNKNOWN_ERROR;
957    return p->stop();
958}
959
960status_t MediaPlayerService::Client::pause()
961{
962    ALOGV("[%d] pause", mConnId);
963    sp<MediaPlayerBase> p = getPlayer();
964    if (p == 0) return UNKNOWN_ERROR;
965    return p->pause();
966}
967
968status_t MediaPlayerService::Client::isPlaying(bool* state)
969{
970    *state = false;
971    sp<MediaPlayerBase> p = getPlayer();
972    if (p == 0) return UNKNOWN_ERROR;
973    *state = p->isPlaying();
974    ALOGV("[%d] isPlaying: %d", mConnId, *state);
975    return NO_ERROR;
976}
977
978status_t MediaPlayerService::Client::setPlaybackSettings(const AudioPlaybackRate& rate)
979{
980    ALOGV("[%d] setPlaybackSettings(%f, %f, %d, %d)",
981            mConnId, rate.mSpeed, rate.mPitch, rate.mFallbackMode, rate.mStretchMode);
982    sp<MediaPlayerBase> p = getPlayer();
983    if (p == 0) return UNKNOWN_ERROR;
984    return p->setPlaybackSettings(rate);
985}
986
987status_t MediaPlayerService::Client::getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */)
988{
989    sp<MediaPlayerBase> p = getPlayer();
990    if (p == 0) return UNKNOWN_ERROR;
991    status_t ret = p->getPlaybackSettings(rate);
992    if (ret == NO_ERROR) {
993        ALOGV("[%d] getPlaybackSettings(%f, %f, %d, %d)",
994                mConnId, rate->mSpeed, rate->mPitch, rate->mFallbackMode, rate->mStretchMode);
995    } else {
996        ALOGV("[%d] getPlaybackSettings returned %d", mConnId, ret);
997    }
998    return ret;
999}
1000
1001status_t MediaPlayerService::Client::setSyncSettings(
1002        const AVSyncSettings& sync, float videoFpsHint)
1003{
1004    ALOGV("[%d] setSyncSettings(%u, %u, %f, %f)",
1005            mConnId, sync.mSource, sync.mAudioAdjustMode, sync.mTolerance, videoFpsHint);
1006    sp<MediaPlayerBase> p = getPlayer();
1007    if (p == 0) return UNKNOWN_ERROR;
1008    return p->setSyncSettings(sync, videoFpsHint);
1009}
1010
1011status_t MediaPlayerService::Client::getSyncSettings(
1012        AVSyncSettings* sync /* nonnull */, float* videoFps /* nonnull */)
1013{
1014    sp<MediaPlayerBase> p = getPlayer();
1015    if (p == 0) return UNKNOWN_ERROR;
1016    status_t ret = p->getSyncSettings(sync, videoFps);
1017    if (ret == NO_ERROR) {
1018        ALOGV("[%d] getSyncSettings(%u, %u, %f, %f)",
1019                mConnId, sync->mSource, sync->mAudioAdjustMode, sync->mTolerance, *videoFps);
1020    } else {
1021        ALOGV("[%d] getSyncSettings returned %d", mConnId, ret);
1022    }
1023    return ret;
1024}
1025
1026status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1027{
1028    ALOGV("getCurrentPosition");
1029    sp<MediaPlayerBase> p = getPlayer();
1030    if (p == 0) return UNKNOWN_ERROR;
1031    status_t ret = p->getCurrentPosition(msec);
1032    if (ret == NO_ERROR) {
1033        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1034    } else {
1035        ALOGE("getCurrentPosition returned %d", ret);
1036    }
1037    return ret;
1038}
1039
1040status_t MediaPlayerService::Client::getDuration(int *msec)
1041{
1042    ALOGV("getDuration");
1043    sp<MediaPlayerBase> p = getPlayer();
1044    if (p == 0) return UNKNOWN_ERROR;
1045    status_t ret = p->getDuration(msec);
1046    if (ret == NO_ERROR) {
1047        ALOGV("[%d] getDuration = %d", mConnId, *msec);
1048    } else {
1049        ALOGE("getDuration returned %d", ret);
1050    }
1051    return ret;
1052}
1053
1054status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
1055    ALOGV("setNextPlayer");
1056    Mutex::Autolock l(mLock);
1057    sp<Client> c = static_cast<Client*>(player.get());
1058    mNextClient = c;
1059
1060    if (c != NULL) {
1061        if (mAudioOutput != NULL) {
1062            mAudioOutput->setNextOutput(c->mAudioOutput);
1063        } else if ((mPlayer != NULL) && !mPlayer->hardwareOutput()) {
1064            ALOGE("no current audio output");
1065        }
1066
1067        if ((mPlayer != NULL) && (mNextClient->getPlayer() != NULL)) {
1068            mPlayer->setNextPlayer(mNextClient->getPlayer());
1069        }
1070    }
1071
1072    return OK;
1073}
1074
1075status_t MediaPlayerService::Client::seekTo(int msec)
1076{
1077    ALOGV("[%d] seekTo(%d)", mConnId, msec);
1078    sp<MediaPlayerBase> p = getPlayer();
1079    if (p == 0) return UNKNOWN_ERROR;
1080    return p->seekTo(msec);
1081}
1082
1083status_t MediaPlayerService::Client::reset()
1084{
1085    ALOGV("[%d] reset", mConnId);
1086    mRetransmitEndpointValid = false;
1087    sp<MediaPlayerBase> p = getPlayer();
1088    if (p == 0) return UNKNOWN_ERROR;
1089    return p->reset();
1090}
1091
1092status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
1093{
1094    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1095    // TODO: for hardware output, call player instead
1096    Mutex::Autolock l(mLock);
1097    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1098    return NO_ERROR;
1099}
1100
1101status_t MediaPlayerService::Client::setAudioAttributes_l(const Parcel &parcel)
1102{
1103    if (mAudioAttributes != NULL) { free(mAudioAttributes); }
1104    mAudioAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1105    if (mAudioAttributes == NULL) {
1106        return NO_MEMORY;
1107    }
1108    unmarshallAudioAttributes(parcel, mAudioAttributes);
1109
1110    ALOGV("setAudioAttributes_l() usage=%d content=%d flags=0x%x tags=%s",
1111            mAudioAttributes->usage, mAudioAttributes->content_type, mAudioAttributes->flags,
1112            mAudioAttributes->tags);
1113
1114    if (mAudioOutput != 0) {
1115        mAudioOutput->setAudioAttributes(mAudioAttributes);
1116    }
1117    return NO_ERROR;
1118}
1119
1120status_t MediaPlayerService::Client::setLooping(int loop)
1121{
1122    ALOGV("[%d] setLooping(%d)", mConnId, loop);
1123    mLoop = loop;
1124    sp<MediaPlayerBase> p = getPlayer();
1125    if (p != 0) return p->setLooping(loop);
1126    return NO_ERROR;
1127}
1128
1129status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1130{
1131    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1132
1133    // for hardware output, call player instead
1134    sp<MediaPlayerBase> p = getPlayer();
1135    {
1136      Mutex::Autolock l(mLock);
1137      if (p != 0 && p->hardwareOutput()) {
1138          MediaPlayerHWInterface* hwp =
1139                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
1140          return hwp->setVolume(leftVolume, rightVolume);
1141      } else {
1142          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1143          return NO_ERROR;
1144      }
1145    }
1146
1147    return NO_ERROR;
1148}
1149
1150status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
1151{
1152    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
1153    Mutex::Autolock l(mLock);
1154    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
1155    return NO_ERROR;
1156}
1157
1158status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
1159{
1160    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
1161    Mutex::Autolock l(mLock);
1162    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
1163    return NO_ERROR;
1164}
1165
1166status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
1167    ALOGV("[%d] setParameter(%d)", mConnId, key);
1168    switch (key) {
1169    case KEY_PARAMETER_AUDIO_ATTRIBUTES:
1170    {
1171        Mutex::Autolock l(mLock);
1172        return setAudioAttributes_l(request);
1173    }
1174    default:
1175        sp<MediaPlayerBase> p = getPlayer();
1176        if (p == 0) { return UNKNOWN_ERROR; }
1177        return p->setParameter(key, request);
1178    }
1179}
1180
1181status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
1182    ALOGV("[%d] getParameter(%d)", mConnId, key);
1183    sp<MediaPlayerBase> p = getPlayer();
1184    if (p == 0) return UNKNOWN_ERROR;
1185    return p->getParameter(key, reply);
1186}
1187
1188status_t MediaPlayerService::Client::setRetransmitEndpoint(
1189        const struct sockaddr_in* endpoint) {
1190
1191    if (NULL != endpoint) {
1192        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
1193        uint16_t p = ntohs(endpoint->sin_port);
1194        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
1195                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
1196    } else {
1197        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
1198    }
1199
1200    sp<MediaPlayerBase> p = getPlayer();
1201
1202    // Right now, the only valid time to set a retransmit endpoint is before
1203    // player selection has been made (since the presence or absence of a
1204    // retransmit endpoint is going to determine which player is selected during
1205    // setDataSource).
1206    if (p != 0) return INVALID_OPERATION;
1207
1208    if (NULL != endpoint) {
1209        mRetransmitEndpoint = *endpoint;
1210        mRetransmitEndpointValid = true;
1211    } else {
1212        mRetransmitEndpointValid = false;
1213    }
1214
1215    return NO_ERROR;
1216}
1217
1218status_t MediaPlayerService::Client::getRetransmitEndpoint(
1219        struct sockaddr_in* endpoint)
1220{
1221    if (NULL == endpoint)
1222        return BAD_VALUE;
1223
1224    sp<MediaPlayerBase> p = getPlayer();
1225
1226    if (p != NULL)
1227        return p->getRetransmitEndpoint(endpoint);
1228
1229    if (!mRetransmitEndpointValid)
1230        return NO_INIT;
1231
1232    *endpoint = mRetransmitEndpoint;
1233
1234    return NO_ERROR;
1235}
1236
1237void MediaPlayerService::Client::notify(
1238        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
1239{
1240    Client* client = static_cast<Client*>(cookie);
1241    if (client == NULL) {
1242        return;
1243    }
1244
1245    sp<IMediaPlayerClient> c;
1246    {
1247        Mutex::Autolock l(client->mLock);
1248        c = client->mClient;
1249        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
1250            if (client->mAudioOutput != NULL)
1251                client->mAudioOutput->switchToNextOutput();
1252            client->mNextClient->start();
1253            client->mNextClient->mClient->notify(MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
1254        }
1255    }
1256
1257    if (MEDIA_INFO == msg &&
1258        MEDIA_INFO_METADATA_UPDATE == ext1) {
1259        const media::Metadata::Type metadata_type = ext2;
1260
1261        if(client->shouldDropMetadata(metadata_type)) {
1262            return;
1263        }
1264
1265        // Update the list of metadata that have changed. getMetadata
1266        // also access mMetadataUpdated and clears it.
1267        client->addNewMetadataUpdate(metadata_type);
1268    }
1269
1270    if (c != NULL) {
1271        ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1272        c->notify(msg, ext1, ext2, obj);
1273    }
1274}
1275
1276
1277bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1278{
1279    Mutex::Autolock lock(mLock);
1280
1281    if (findMetadata(mMetadataDrop, code)) {
1282        return true;
1283    }
1284
1285    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1286        return false;
1287    } else {
1288        return true;
1289    }
1290}
1291
1292
1293void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1294    Mutex::Autolock lock(mLock);
1295    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1296        mMetadataUpdated.add(metadata_type);
1297    }
1298}
1299
1300#if CALLBACK_ANTAGONIZER
1301const int Antagonizer::interval = 10000; // 10 msecs
1302
1303Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1304    mExit(false), mActive(false), mClient(client), mCb(cb)
1305{
1306    createThread(callbackThread, this);
1307}
1308
1309void Antagonizer::kill()
1310{
1311    Mutex::Autolock _l(mLock);
1312    mActive = false;
1313    mExit = true;
1314    mCondition.wait(mLock);
1315}
1316
1317int Antagonizer::callbackThread(void* user)
1318{
1319    ALOGD("Antagonizer started");
1320    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1321    while (!p->mExit) {
1322        if (p->mActive) {
1323            ALOGV("send event");
1324            p->mCb(p->mClient, 0, 0, 0);
1325        }
1326        usleep(interval);
1327    }
1328    Mutex::Autolock _l(p->mLock);
1329    p->mCondition.signal();
1330    ALOGD("Antagonizer stopped");
1331    return 0;
1332}
1333#endif
1334
1335#undef LOG_TAG
1336#define LOG_TAG "AudioSink"
1337MediaPlayerService::AudioOutput::AudioOutput(int sessionId, int uid, int pid,
1338        const audio_attributes_t* attr)
1339    : mCallback(NULL),
1340      mCallbackCookie(NULL),
1341      mCallbackData(NULL),
1342      mBytesWritten(0),
1343      mStreamType(AUDIO_STREAM_MUSIC),
1344      mLeftVolume(1.0),
1345      mRightVolume(1.0),
1346      mPlaybackRate(AUDIO_PLAYBACK_RATE_DEFAULT),
1347      mSampleRateHz(0),
1348      mMsecsPerFrame(0),
1349      mFrameSize(0),
1350      mSessionId(sessionId),
1351      mUid(uid),
1352      mPid(pid),
1353      mSendLevel(0.0),
1354      mAuxEffectId(0),
1355      mFlags(AUDIO_OUTPUT_FLAG_NONE)
1356{
1357    ALOGV("AudioOutput(%d)", sessionId);
1358    if (attr != NULL) {
1359        mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1360        if (mAttributes != NULL) {
1361            memcpy(mAttributes, attr, sizeof(audio_attributes_t));
1362            mStreamType = audio_attributes_to_stream_type(attr);
1363        }
1364    } else {
1365        mAttributes = NULL;
1366    }
1367
1368    setMinBufferCount();
1369}
1370
1371MediaPlayerService::AudioOutput::~AudioOutput()
1372{
1373    close();
1374    free(mAttributes);
1375    delete mCallbackData;
1376}
1377
1378//static
1379void MediaPlayerService::AudioOutput::setMinBufferCount()
1380{
1381    char value[PROPERTY_VALUE_MAX];
1382    if (property_get("ro.kernel.qemu", value, 0)) {
1383        mIsOnEmulator = true;
1384        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1385    }
1386}
1387
1388// static
1389bool MediaPlayerService::AudioOutput::isOnEmulator()
1390{
1391    setMinBufferCount(); // benign race wrt other threads
1392    return mIsOnEmulator;
1393}
1394
1395// static
1396int MediaPlayerService::AudioOutput::getMinBufferCount()
1397{
1398    setMinBufferCount(); // benign race wrt other threads
1399    return mMinBufferCount;
1400}
1401
1402ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1403{
1404    Mutex::Autolock lock(mLock);
1405    if (mTrack == 0) return NO_INIT;
1406    return mTrack->frameCount() * mFrameSize;
1407}
1408
1409ssize_t MediaPlayerService::AudioOutput::frameCount() const
1410{
1411    Mutex::Autolock lock(mLock);
1412    if (mTrack == 0) return NO_INIT;
1413    return mTrack->frameCount();
1414}
1415
1416ssize_t MediaPlayerService::AudioOutput::channelCount() const
1417{
1418    Mutex::Autolock lock(mLock);
1419    if (mTrack == 0) return NO_INIT;
1420    return mTrack->channelCount();
1421}
1422
1423ssize_t MediaPlayerService::AudioOutput::frameSize() const
1424{
1425    Mutex::Autolock lock(mLock);
1426    if (mTrack == 0) return NO_INIT;
1427    return mFrameSize;
1428}
1429
1430uint32_t MediaPlayerService::AudioOutput::latency () const
1431{
1432    Mutex::Autolock lock(mLock);
1433    if (mTrack == 0) return 0;
1434    return mTrack->latency();
1435}
1436
1437float MediaPlayerService::AudioOutput::msecsPerFrame() const
1438{
1439    Mutex::Autolock lock(mLock);
1440    return mMsecsPerFrame;
1441}
1442
1443status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position) const
1444{
1445    Mutex::Autolock lock(mLock);
1446    if (mTrack == 0) return NO_INIT;
1447    return mTrack->getPosition(position);
1448}
1449
1450status_t MediaPlayerService::AudioOutput::getTimestamp(AudioTimestamp &ts) const
1451{
1452    Mutex::Autolock lock(mLock);
1453    if (mTrack == 0) return NO_INIT;
1454    return mTrack->getTimestamp(ts);
1455}
1456
1457status_t MediaPlayerService::AudioOutput::getFramesWritten(uint32_t *frameswritten) const
1458{
1459    Mutex::Autolock lock(mLock);
1460    if (mTrack == 0) return NO_INIT;
1461    *frameswritten = mBytesWritten / mFrameSize;
1462    return OK;
1463}
1464
1465status_t MediaPlayerService::AudioOutput::setParameters(const String8& keyValuePairs)
1466{
1467    Mutex::Autolock lock(mLock);
1468    if (mTrack == 0) return NO_INIT;
1469    return mTrack->setParameters(keyValuePairs);
1470}
1471
1472String8  MediaPlayerService::AudioOutput::getParameters(const String8& keys)
1473{
1474    Mutex::Autolock lock(mLock);
1475    if (mTrack == 0) return String8::empty();
1476    return mTrack->getParameters(keys);
1477}
1478
1479void MediaPlayerService::AudioOutput::setAudioAttributes(const audio_attributes_t * attributes) {
1480    Mutex::Autolock lock(mLock);
1481    if (attributes == NULL) {
1482        free(mAttributes);
1483        mAttributes = NULL;
1484    } else {
1485        if (mAttributes == NULL) {
1486            mAttributes = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
1487        }
1488        memcpy(mAttributes, attributes, sizeof(audio_attributes_t));
1489        mStreamType = audio_attributes_to_stream_type(attributes);
1490    }
1491}
1492
1493void MediaPlayerService::AudioOutput::setAudioStreamType(audio_stream_type_t streamType)
1494{
1495    Mutex::Autolock lock(mLock);
1496    // do not allow direct stream type modification if attributes have been set
1497    if (mAttributes == NULL) {
1498        mStreamType = streamType;
1499    }
1500}
1501
1502void MediaPlayerService::AudioOutput::deleteRecycledTrack_l()
1503{
1504    ALOGV("deleteRecycledTrack_l");
1505    if (mRecycledTrack != 0) {
1506
1507        if (mCallbackData != NULL) {
1508            mCallbackData->setOutput(NULL);
1509            mCallbackData->endTrackSwitch();
1510        }
1511
1512        if ((mRecycledTrack->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) {
1513            mRecycledTrack->flush();
1514        }
1515        // An offloaded track isn't flushed because the STREAM_END is reported
1516        // slightly prematurely to allow time for the gapless track switch
1517        // but this means that if we decide not to recycle the track there
1518        // could be a small amount of residual data still playing. We leave
1519        // AudioFlinger to drain the track.
1520
1521        mRecycledTrack.clear();
1522        close_l();
1523        delete mCallbackData;
1524        mCallbackData = NULL;
1525    }
1526}
1527
1528void MediaPlayerService::AudioOutput::close_l()
1529{
1530    mTrack.clear();
1531}
1532
1533status_t MediaPlayerService::AudioOutput::open(
1534        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
1535        audio_format_t format, int bufferCount,
1536        AudioCallback cb, void *cookie,
1537        audio_output_flags_t flags,
1538        const audio_offload_info_t *offloadInfo,
1539        bool doNotReconnect,
1540        uint32_t suggestedFrameCount)
1541{
1542    ALOGV("open(%u, %d, 0x%x, 0x%x, %d, %d 0x%x)", sampleRate, channelCount, channelMask,
1543                format, bufferCount, mSessionId, flags);
1544
1545    // offloading is only supported in callback mode for now.
1546    // offloadInfo must be present if offload flag is set
1547    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) &&
1548            ((cb == NULL) || (offloadInfo == NULL))) {
1549        return BAD_VALUE;
1550    }
1551
1552    // compute frame count for the AudioTrack internal buffer
1553    size_t frameCount;
1554    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1555        frameCount = 0; // AudioTrack will get frame count from AudioFlinger
1556    } else {
1557        // try to estimate the buffer processing fetch size from AudioFlinger.
1558        // framesPerBuffer is approximate and generally correct, except when it's not :-).
1559        uint32_t afSampleRate;
1560        size_t afFrameCount;
1561        if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1562            return NO_INIT;
1563        }
1564        if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1565            return NO_INIT;
1566        }
1567        const size_t framesPerBuffer =
1568                (unsigned long long)sampleRate * afFrameCount / afSampleRate;
1569
1570        if (bufferCount == 0) {
1571            // use suggestedFrameCount
1572            bufferCount = (suggestedFrameCount + framesPerBuffer - 1) / framesPerBuffer;
1573        }
1574        // Check argument bufferCount against the mininum buffer count
1575        if (bufferCount != 0 && bufferCount < mMinBufferCount) {
1576            ALOGV("bufferCount (%d) increased to %d", bufferCount, mMinBufferCount);
1577            bufferCount = mMinBufferCount;
1578        }
1579        // if frameCount is 0, then AudioTrack will get frame count from AudioFlinger
1580        // which will be the minimum size permitted.
1581        frameCount = bufferCount * framesPerBuffer;
1582    }
1583
1584    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
1585        channelMask = audio_channel_out_mask_from_count(channelCount);
1586        if (0 == channelMask) {
1587            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
1588            return NO_INIT;
1589        }
1590    }
1591
1592    Mutex::Autolock lock(mLock);
1593    mCallback = cb;
1594    mCallbackCookie = cookie;
1595
1596    // Check whether we can recycle the track
1597    bool reuse = false;
1598    bool bothOffloaded = false;
1599
1600    if (mRecycledTrack != 0) {
1601        // check whether we are switching between two offloaded tracks
1602        bothOffloaded = (flags & mRecycledTrack->getFlags()
1603                                & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0;
1604
1605        // check if the existing track can be reused as-is, or if a new track needs to be created.
1606        reuse = true;
1607
1608        if ((mCallbackData == NULL && mCallback != NULL) ||
1609                (mCallbackData != NULL && mCallback == NULL)) {
1610            // recycled track uses callbacks but the caller wants to use writes, or vice versa
1611            ALOGV("can't chain callback and write");
1612            reuse = false;
1613        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
1614                (mRecycledTrack->channelCount() != (uint32_t)channelCount) ) {
1615            ALOGV("samplerate, channelcount differ: %u/%u Hz, %u/%d ch",
1616                  mRecycledTrack->getSampleRate(), sampleRate,
1617                  mRecycledTrack->channelCount(), channelCount);
1618            reuse = false;
1619        } else if (flags != mFlags) {
1620            ALOGV("output flags differ %08x/%08x", flags, mFlags);
1621            reuse = false;
1622        } else if (mRecycledTrack->format() != format) {
1623            reuse = false;
1624        }
1625    } else {
1626        ALOGV("no track available to recycle");
1627    }
1628
1629    ALOGV_IF(bothOffloaded, "both tracks offloaded");
1630
1631    // If we can't recycle and both tracks are offloaded
1632    // we must close the previous output before opening a new one
1633    if (bothOffloaded && !reuse) {
1634        ALOGV("both offloaded and not recycling");
1635        deleteRecycledTrack_l();
1636    }
1637
1638    sp<AudioTrack> t;
1639    CallbackData *newcbd = NULL;
1640
1641    // We don't attempt to create a new track if we are recycling an
1642    // offloaded track. But, if we are recycling a non-offloaded or we
1643    // are switching where one is offloaded and one isn't then we create
1644    // the new track in advance so that we can read additional stream info
1645
1646    if (!(reuse && bothOffloaded)) {
1647        ALOGV("creating new AudioTrack");
1648
1649        if (mCallback != NULL) {
1650            newcbd = new CallbackData(this);
1651            t = new AudioTrack(
1652                    mStreamType,
1653                    sampleRate,
1654                    format,
1655                    channelMask,
1656                    frameCount,
1657                    flags,
1658                    CallbackWrapper,
1659                    newcbd,
1660                    0,  // notification frames
1661                    mSessionId,
1662                    AudioTrack::TRANSFER_CALLBACK,
1663                    offloadInfo,
1664                    mUid,
1665                    mPid,
1666                    mAttributes,
1667                    doNotReconnect);
1668        } else {
1669            t = new AudioTrack(
1670                    mStreamType,
1671                    sampleRate,
1672                    format,
1673                    channelMask,
1674                    frameCount,
1675                    flags,
1676                    NULL, // callback
1677                    NULL, // user data
1678                    0, // notification frames
1679                    mSessionId,
1680                    AudioTrack::TRANSFER_DEFAULT,
1681                    NULL, // offload info
1682                    mUid,
1683                    mPid,
1684                    mAttributes,
1685                    doNotReconnect);
1686        }
1687
1688        if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1689            ALOGE("Unable to create audio track");
1690            delete newcbd;
1691            // t goes out of scope, so reference count drops to zero
1692            return NO_INIT;
1693        } else {
1694            // successful AudioTrack initialization implies a legacy stream type was generated
1695            // from the audio attributes
1696            mStreamType = t->streamType();
1697        }
1698    }
1699
1700    if (reuse) {
1701        CHECK(mRecycledTrack != NULL);
1702
1703        if (!bothOffloaded) {
1704            if (mRecycledTrack->frameCount() != t->frameCount()) {
1705                ALOGV("framecount differs: %u/%u frames",
1706                      mRecycledTrack->frameCount(), t->frameCount());
1707                reuse = false;
1708            }
1709        }
1710
1711        if (reuse) {
1712            ALOGV("chaining to next output and recycling track");
1713            close_l();
1714            mTrack = mRecycledTrack;
1715            mRecycledTrack.clear();
1716            if (mCallbackData != NULL) {
1717                mCallbackData->setOutput(this);
1718            }
1719            delete newcbd;
1720            return OK;
1721        }
1722    }
1723
1724    // we're not going to reuse the track, unblock and flush it
1725    // this was done earlier if both tracks are offloaded
1726    if (!bothOffloaded) {
1727        deleteRecycledTrack_l();
1728    }
1729
1730    CHECK((t != NULL) && ((mCallback == NULL) || (newcbd != NULL)));
1731
1732    mCallbackData = newcbd;
1733    ALOGV("setVolume");
1734    t->setVolume(mLeftVolume, mRightVolume);
1735
1736    mSampleRateHz = sampleRate;
1737    mFlags = t->getFlags(); // we suggest the flags above, but new AudioTrack() may not grant it.
1738    mMsecsPerFrame = 1E3f / (mPlaybackRate.mSpeed * sampleRate);
1739    mFrameSize = t->frameSize();
1740    uint32_t pos;
1741    if (t->getPosition(&pos) == OK) {
1742        mBytesWritten = uint64_t(pos) * mFrameSize;
1743    }
1744    mTrack = t;
1745
1746    status_t res = NO_ERROR;
1747    // Note some output devices may give us a direct track even though we don't specify it.
1748    // Example: Line application b/17459982.
1749    if ((mFlags & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | AUDIO_OUTPUT_FLAG_DIRECT)) == 0) {
1750        res = t->setPlaybackRate(mPlaybackRate);
1751        if (res == NO_ERROR) {
1752            t->setAuxEffectSendLevel(mSendLevel);
1753            res = t->attachAuxEffect(mAuxEffectId);
1754        }
1755    }
1756    ALOGV("open() DONE status %d", res);
1757    return res;
1758}
1759
1760status_t MediaPlayerService::AudioOutput::start()
1761{
1762    ALOGV("start");
1763    Mutex::Autolock lock(mLock);
1764    if (mCallbackData != NULL) {
1765        mCallbackData->endTrackSwitch();
1766    }
1767    if (mTrack != 0) {
1768        mTrack->setVolume(mLeftVolume, mRightVolume);
1769        mTrack->setAuxEffectSendLevel(mSendLevel);
1770        return mTrack->start();
1771    }
1772    return NO_INIT;
1773}
1774
1775void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
1776    Mutex::Autolock lock(mLock);
1777    mNextOutput = nextOutput;
1778}
1779
1780void MediaPlayerService::AudioOutput::switchToNextOutput() {
1781    ALOGV("switchToNextOutput");
1782
1783    // Try to acquire the callback lock before moving track (without incurring deadlock).
1784    const unsigned kMaxSwitchTries = 100;
1785    Mutex::Autolock lock(mLock);
1786    for (unsigned tries = 0;;) {
1787        if (mTrack == 0) {
1788            return;
1789        }
1790        if (mNextOutput != NULL && mNextOutput != this) {
1791            if (mCallbackData != NULL) {
1792                // two alternative approaches
1793#if 1
1794                CallbackData *callbackData = mCallbackData;
1795                mLock.unlock();
1796                // proper acquisition sequence
1797                callbackData->lock();
1798                mLock.lock();
1799                // Caution: it is unlikely that someone deleted our callback or changed our target
1800                if (callbackData != mCallbackData || mNextOutput == NULL || mNextOutput == this) {
1801                    // fatal if we are starved out.
1802                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1803                            "switchToNextOutput() cannot obtain correct lock sequence");
1804                    callbackData->unlock();
1805                    continue;
1806                }
1807                callbackData->mSwitching = true; // begin track switch
1808#else
1809                // tryBeginTrackSwitch() returns false if the callback has the lock.
1810                if (!mCallbackData->tryBeginTrackSwitch()) {
1811                    // fatal if we are starved out.
1812                    LOG_ALWAYS_FATAL_IF(++tries > kMaxSwitchTries,
1813                            "switchToNextOutput() cannot obtain callback lock");
1814                    mLock.unlock();
1815                    usleep(5 * 1000 /* usec */); // allow callback to use AudioOutput
1816                    mLock.lock();
1817                    continue;
1818                }
1819#endif
1820            }
1821
1822            Mutex::Autolock nextLock(mNextOutput->mLock);
1823
1824            // If the next output track is not NULL, then it has been
1825            // opened already for playback.
1826            // This is possible even without the next player being started,
1827            // for example, the next player could be prepared and seeked.
1828            //
1829            // Presuming it isn't advisable to force the track over.
1830             if (mNextOutput->mTrack == NULL) {
1831                ALOGD("Recycling track for gapless playback");
1832                delete mNextOutput->mCallbackData;
1833                mNextOutput->mCallbackData = mCallbackData;
1834                mNextOutput->mRecycledTrack = mTrack;
1835                mNextOutput->mSampleRateHz = mSampleRateHz;
1836                mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
1837                mNextOutput->mBytesWritten = mBytesWritten;
1838                mNextOutput->mFlags = mFlags;
1839                mNextOutput->mFrameSize = mFrameSize;
1840                close_l();
1841                mCallbackData = NULL;  // destruction handled by mNextOutput
1842            } else {
1843                ALOGW("Ignoring gapless playback because next player has already started");
1844                // remove track in case resource needed for future players.
1845                if (mCallbackData != NULL) {
1846                    mCallbackData->endTrackSwitch();  // release lock for callbacks before close.
1847                }
1848                close_l();
1849            }
1850        }
1851        break;
1852    }
1853}
1854
1855ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size, bool blocking)
1856{
1857    Mutex::Autolock lock(mLock);
1858    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1859
1860    //ALOGV("write(%p, %u)", buffer, size);
1861    if (mTrack != 0) {
1862        ssize_t ret = mTrack->write(buffer, size, blocking);
1863        if (ret >= 0) {
1864            mBytesWritten += ret;
1865        }
1866        return ret;
1867    }
1868    return NO_INIT;
1869}
1870
1871void MediaPlayerService::AudioOutput::stop()
1872{
1873    ALOGV("stop");
1874    Mutex::Autolock lock(mLock);
1875    mBytesWritten = 0;
1876    if (mTrack != 0) mTrack->stop();
1877}
1878
1879void MediaPlayerService::AudioOutput::flush()
1880{
1881    ALOGV("flush");
1882    Mutex::Autolock lock(mLock);
1883    mBytesWritten = 0;
1884    if (mTrack != 0) mTrack->flush();
1885}
1886
1887void MediaPlayerService::AudioOutput::pause()
1888{
1889    ALOGV("pause");
1890    Mutex::Autolock lock(mLock);
1891    if (mTrack != 0) mTrack->pause();
1892}
1893
1894void MediaPlayerService::AudioOutput::close()
1895{
1896    ALOGV("close");
1897    Mutex::Autolock lock(mLock);
1898    close_l();
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