MediaPlayerService.cpp revision dac6a31a33ba53fb93850670cdddd1e6515dadce 
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 <dirent.h>
27#include <unistd.h>
28
29#include <string.h>
30
31#include <cutils/atomic.h>
32#include <cutils/properties.h> // for property_get
33
34#include <utils/misc.h>
35
36#include <android_runtime/ActivityManager.h>
37
38#include <binder/IPCThreadState.h>
39#include <binder/IServiceManager.h>
40#include <binder/MemoryHeapBase.h>
41#include <binder/MemoryBase.h>
42#include <utils/Errors.h>  // for status_t
43#include <utils/String8.h>
44#include <utils/SystemClock.h>
45#include <utils/Vector.h>
46#include <cutils/properties.h>
47
48#include <media/MediaPlayerInterface.h>
49#include <media/mediarecorder.h>
50#include <media/MediaMetadataRetrieverInterface.h>
51#include <media/Metadata.h>
52#include <media/AudioTrack.h>
53
54#include "MediaRecorderClient.h"
55#include "MediaPlayerService.h"
56#include "MetadataRetrieverClient.h"
57
58#include "MidiFile.h"
59#include "VorbisPlayer.h"
60#include <media/PVPlayer.h>
61#include "TestPlayerStub.h"
62#include "StagefrightPlayer.h"
63
64#include <OMX.h>
65
66/* desktop Linux needs a little help with gettid() */
67#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS)
68#define __KERNEL__
69# include <linux/unistd.h>
70#ifdef _syscall0
71_syscall0(pid_t,gettid)
72#else
73pid_t gettid() { return syscall(__NR_gettid);}
74#endif
75#undef __KERNEL__
76#endif
77
78namespace {
79using android::media::Metadata;
80using android::status_t;
81using android::OK;
82using android::BAD_VALUE;
83using android::NOT_ENOUGH_DATA;
84using android::Parcel;
85
86// Max number of entries in the filter.
87const int kMaxFilterSize = 64;  // I pulled that out of thin air.
88
89// FIXME: Move all the metadata related function in the Metadata.cpp
90
91
92// Unmarshall a filter from a Parcel.
93// Filter format in a parcel:
94//
95//  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
96// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
97// |                       number of entries (n)                   |
98// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
99// |                       metadata type 1                         |
100// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
101// |                       metadata type 2                         |
102// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
103//  ....
104// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
105// |                       metadata type n                         |
106// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
107//
108// @param p Parcel that should start with a filter.
109// @param[out] filter On exit contains the list of metadata type to be
110//                    filtered.
111// @param[out] status On exit contains the status code to be returned.
112// @return true if the parcel starts with a valid filter.
113bool unmarshallFilter(const Parcel& p,
114                      Metadata::Filter *filter,
115                      status_t *status)
116{
117    int32_t val;
118    if (p.readInt32(&val) != OK)
119    {
120        LOGE("Failed to read filter's length");
121        *status = NOT_ENOUGH_DATA;
122        return false;
123    }
124
125    if( val > kMaxFilterSize || val < 0)
126    {
127        LOGE("Invalid filter len %d", val);
128        *status = BAD_VALUE;
129        return false;
130    }
131
132    const size_t num = val;
133
134    filter->clear();
135    filter->setCapacity(num);
136
137    size_t size = num * sizeof(Metadata::Type);
138
139
140    if (p.dataAvail() < size)
141    {
142        LOGE("Filter too short expected %d but got %d", size, p.dataAvail());
143        *status = NOT_ENOUGH_DATA;
144        return false;
145    }
146
147    const Metadata::Type *data =
148            static_cast<const Metadata::Type*>(p.readInplace(size));
149
150    if (NULL == data)
151    {
152        LOGE("Filter had no data");
153        *status = BAD_VALUE;
154        return false;
155    }
156
157    // TODO: The stl impl of vector would be more efficient here
158    // because it degenerates into a memcpy on pod types. Try to
159    // replace later or use stl::set.
160    for (size_t i = 0; i < num; ++i)
161    {
162        filter->add(*data);
163        ++data;
164    }
165    *status = OK;
166    return true;
167}
168
169// @param filter Of metadata type.
170// @param val To be searched.
171// @return true if a match was found.
172bool findMetadata(const Metadata::Filter& filter, const int32_t val)
173{
174    // Deal with empty and ANY right away
175    if (filter.isEmpty()) return false;
176    if (filter[0] == Metadata::kAny) return true;
177
178    return filter.indexOf(val) >= 0;
179}
180
181}  // anonymous namespace
182
183
184namespace android {
185
186// TODO: Temp hack until we can register players
187typedef struct {
188    const char *extension;
189    const player_type playertype;
190} extmap;
191extmap FILE_EXTS [] =  {
192        {".mid", SONIVOX_PLAYER},
193        {".midi", SONIVOX_PLAYER},
194        {".smf", SONIVOX_PLAYER},
195        {".xmf", SONIVOX_PLAYER},
196        {".imy", SONIVOX_PLAYER},
197        {".rtttl", SONIVOX_PLAYER},
198        {".rtx", SONIVOX_PLAYER},
199        {".ota", SONIVOX_PLAYER},
200        {".ogg", VORBIS_PLAYER},
201        {".oga", VORBIS_PLAYER},
202};
203
204// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
205/* static */ const uint32_t MediaPlayerService::AudioOutput::kAudioVideoDelayMs = 0;
206/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
207/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
208
209void MediaPlayerService::instantiate() {
210    defaultServiceManager()->addService(
211            String16("media.player"), new MediaPlayerService());
212}
213
214MediaPlayerService::MediaPlayerService()
215{
216    LOGV("MediaPlayerService created");
217    mNextConnId = 1;
218}
219
220MediaPlayerService::~MediaPlayerService()
221{
222    LOGV("MediaPlayerService destroyed");
223}
224
225sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
226{
227#ifndef NO_OPENCORE
228    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
229    wp<MediaRecorderClient> w = recorder;
230    Mutex::Autolock lock(mLock);
231    mMediaRecorderClients.add(w);
232#else
233    sp<MediaRecorderClient> recorder = NULL;
234#endif
235    LOGV("Create new media recorder client from pid %d", pid);
236    return recorder;
237}
238
239void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
240{
241    Mutex::Autolock lock(mLock);
242    mMediaRecorderClients.remove(client);
243    LOGV("Delete media recorder client");
244}
245
246sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
247{
248    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
249    LOGV("Create new media retriever from pid %d", pid);
250    return retriever;
251}
252
253sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
254{
255    int32_t connId = android_atomic_inc(&mNextConnId);
256    sp<Client> c = new Client(this, pid, connId, client);
257    LOGV("Create new client(%d) from pid %d, url=%s, connId=%d", connId, pid, url, connId);
258    if (NO_ERROR != c->setDataSource(url))
259    {
260        c.clear();
261        return c;
262    }
263    wp<Client> w = c;
264    Mutex::Autolock lock(mLock);
265    mClients.add(w);
266    return c;
267}
268
269sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
270        int fd, int64_t offset, int64_t length)
271{
272    int32_t connId = android_atomic_inc(&mNextConnId);
273    sp<Client> c = new Client(this, pid, connId, client);
274    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
275            connId, pid, fd, offset, length);
276    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
277        c.clear();
278    } else {
279        wp<Client> w = c;
280        Mutex::Autolock lock(mLock);
281        mClients.add(w);
282    }
283    ::close(fd);
284    return c;
285}
286
287sp<IOMX> MediaPlayerService::createOMX() {
288    return new OMX;
289}
290
291status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
292{
293    const size_t SIZE = 256;
294    char buffer[SIZE];
295    String8 result;
296
297    result.append(" AudioCache\n");
298    if (mHeap != 0) {
299        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
300                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
301        result.append(buffer);
302    }
303    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
304            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
305    result.append(buffer);
306    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
307            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
308    result.append(buffer);
309    ::write(fd, result.string(), result.size());
310    return NO_ERROR;
311}
312
313status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
314{
315    const size_t SIZE = 256;
316    char buffer[SIZE];
317    String8 result;
318
319    result.append(" AudioOutput\n");
320    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
321            mStreamType, mLeftVolume, mRightVolume);
322    result.append(buffer);
323    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
324            mMsecsPerFrame, mLatency);
325    result.append(buffer);
326    ::write(fd, result.string(), result.size());
327    if (mTrack != 0) {
328        mTrack->dump(fd, args);
329    }
330    return NO_ERROR;
331}
332
333status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
334{
335    const size_t SIZE = 256;
336    char buffer[SIZE];
337    String8 result;
338    result.append(" Client\n");
339    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
340            mPid, mConnId, mStatus, mLoop?"true": "false");
341    result.append(buffer);
342    write(fd, result.string(), result.size());
343    if (mAudioOutput != 0) {
344        mAudioOutput->dump(fd, args);
345    }
346    write(fd, "\n", 1);
347    return NO_ERROR;
348}
349
350static int myTid() {
351#ifdef HAVE_GETTID
352    return gettid();
353#else
354    return getpid();
355#endif
356}
357
358#if defined(__arm__)
359extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
360        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
361extern "C" void free_malloc_leak_info(uint8_t* info);
362
363void memStatus(int fd, const Vector<String16>& args)
364{
365    const size_t SIZE = 256;
366    char buffer[SIZE];
367    String8 result;
368
369    typedef struct {
370        size_t size;
371        size_t dups;
372        intptr_t * backtrace;
373    } AllocEntry;
374
375    uint8_t *info = NULL;
376    size_t overallSize = 0;
377    size_t infoSize = 0;
378    size_t totalMemory = 0;
379    size_t backtraceSize = 0;
380
381    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
382    if (info) {
383        uint8_t *ptr = info;
384        size_t count = overallSize / infoSize;
385
386        snprintf(buffer, SIZE, " Allocation count %i\n", count);
387        result.append(buffer);
388
389        AllocEntry * entries = new AllocEntry[count];
390
391        for (size_t i = 0; i < count; i++) {
392            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
393            AllocEntry *e = &entries[i];
394
395            e->size = *reinterpret_cast<size_t *>(ptr);
396            ptr += sizeof(size_t);
397
398            e->dups = *reinterpret_cast<size_t *>(ptr);
399            ptr += sizeof(size_t);
400
401            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
402            ptr += sizeof(intptr_t) * backtraceSize;
403        }
404
405        // Now we need to sort the entries.  They come sorted by size but
406        // not by stack trace which causes problems using diff.
407        bool moved;
408        do {
409            moved = false;
410            for (size_t i = 0; i < (count - 1); i++) {
411                AllocEntry *e1 = &entries[i];
412                AllocEntry *e2 = &entries[i+1];
413
414                bool swap = e1->size < e2->size;
415                if (e1->size == e2->size) {
416                    for(size_t j = 0; j < backtraceSize; j++) {
417                        if (e1->backtrace[j] == e2->backtrace[j]) {
418                            continue;
419                        }
420                        swap = e1->backtrace[j] < e2->backtrace[j];
421                        break;
422                    }
423                }
424                if (swap) {
425                    AllocEntry t = entries[i];
426                    entries[i] = entries[i+1];
427                    entries[i+1] = t;
428                    moved = true;
429                }
430            }
431        } while (moved);
432
433        for (size_t i = 0; i < count; i++) {
434            AllocEntry *e = &entries[i];
435
436            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
437            result.append(buffer);
438            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
439                if (ct) {
440                    result.append(", ");
441                }
442                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
443                result.append(buffer);
444            }
445            result.append("\n");
446        }
447
448        delete[] entries;
449        free_malloc_leak_info(info);
450    }
451
452    write(fd, result.string(), result.size());
453}
454#endif
455
456status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
457{
458    const size_t SIZE = 256;
459    char buffer[SIZE];
460    String8 result;
461    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
462        snprintf(buffer, SIZE, "Permission Denial: "
463                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
464                IPCThreadState::self()->getCallingPid(),
465                IPCThreadState::self()->getCallingUid());
466        result.append(buffer);
467    } else {
468        Mutex::Autolock lock(mLock);
469        for (int i = 0, n = mClients.size(); i < n; ++i) {
470            sp<Client> c = mClients[i].promote();
471            if (c != 0) c->dump(fd, args);
472        }
473        for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
474            result.append(" MediaRecorderClient\n");
475            sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
476            snprintf(buffer, 255, "  pid(%d)\n\n", c->mPid);
477            result.append(buffer);
478        }
479
480        result.append(" Files opened and/or mapped:\n");
481        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
482        FILE *f = fopen(buffer, "r");
483        if (f) {
484            while (!feof(f)) {
485                fgets(buffer, SIZE, f);
486                if (strstr(buffer, " /sdcard/") ||
487                    strstr(buffer, " /system/sounds/") ||
488                    strstr(buffer, " /system/media/")) {
489                    result.append("  ");
490                    result.append(buffer);
491                }
492            }
493            fclose(f);
494        } else {
495            result.append("couldn't open ");
496            result.append(buffer);
497            result.append("\n");
498        }
499
500        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
501        DIR *d = opendir(buffer);
502        if (d) {
503            struct dirent *ent;
504            while((ent = readdir(d)) != NULL) {
505                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
506                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
507                    struct stat s;
508                    if (lstat(buffer, &s) == 0) {
509                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
510                            char linkto[256];
511                            int len = readlink(buffer, linkto, sizeof(linkto));
512                            if(len > 0) {
513                                if(len > 255) {
514                                    linkto[252] = '.';
515                                    linkto[253] = '.';
516                                    linkto[254] = '.';
517                                    linkto[255] = 0;
518                                } else {
519                                    linkto[len] = 0;
520                                }
521                                if (strstr(linkto, "/sdcard/") == linkto ||
522                                    strstr(linkto, "/system/sounds/") == linkto ||
523                                    strstr(linkto, "/system/media/") == linkto) {
524                                    result.append("  ");
525                                    result.append(buffer);
526                                    result.append(" -> ");
527                                    result.append(linkto);
528                                    result.append("\n");
529                                }
530                            }
531                        } else {
532                            result.append("  unexpected type for ");
533                            result.append(buffer);
534                            result.append("\n");
535                        }
536                    }
537                }
538            }
539            closedir(d);
540        } else {
541            result.append("couldn't open ");
542            result.append(buffer);
543            result.append("\n");
544        }
545
546#if defined(__arm__)
547        bool dumpMem = false;
548        for (size_t i = 0; i < args.size(); i++) {
549            if (args[i] == String16("-m")) {
550                dumpMem = true;
551            }
552        }
553        if (dumpMem) {
554            memStatus(fd, args);
555        }
556#endif
557    }
558    write(fd, result.string(), result.size());
559    return NO_ERROR;
560}
561
562void MediaPlayerService::removeClient(wp<Client> client)
563{
564    Mutex::Autolock lock(mLock);
565    mClients.remove(client);
566}
567
568MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
569        int32_t connId, const sp<IMediaPlayerClient>& client)
570{
571    LOGV("Client(%d) constructor", connId);
572    mPid = pid;
573    mConnId = connId;
574    mService = service;
575    mClient = client;
576    mLoop = false;
577    mStatus = NO_INIT;
578#if CALLBACK_ANTAGONIZER
579    LOGD("create Antagonizer");
580    mAntagonizer = new Antagonizer(notify, this);
581#endif
582}
583
584MediaPlayerService::Client::~Client()
585{
586    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
587    mAudioOutput.clear();
588    wp<Client> client(this);
589    disconnect();
590    mService->removeClient(client);
591}
592
593void MediaPlayerService::Client::disconnect()
594{
595    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
596    // grab local reference and clear main reference to prevent future
597    // access to object
598    sp<MediaPlayerBase> p;
599    {
600        Mutex::Autolock l(mLock);
601        p = mPlayer;
602    }
603    mClient.clear();
604
605    mPlayer.clear();
606
607    // clear the notification to prevent callbacks to dead client
608    // and reset the player. We assume the player will serialize
609    // access to itself if necessary.
610    if (p != 0) {
611        p->setNotifyCallback(0, 0);
612#if CALLBACK_ANTAGONIZER
613        LOGD("kill Antagonizer");
614        mAntagonizer->kill();
615#endif
616        p->reset();
617    }
618
619    IPCThreadState::self()->flushCommands();
620}
621
622static player_type getDefaultPlayerType() {
623#if BUILD_WITH_FULL_STAGEFRIGHT
624    char value[PROPERTY_VALUE_MAX];
625    if (property_get("media.stagefright.enable-player", value, NULL)
626        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
627        return STAGEFRIGHT_PLAYER;
628    }
629#endif
630
631    return PV_PLAYER;
632}
633
634player_type getPlayerType(int fd, int64_t offset, int64_t length)
635{
636    char buf[20];
637    lseek(fd, offset, SEEK_SET);
638    read(fd, buf, sizeof(buf));
639    lseek(fd, offset, SEEK_SET);
640
641    long ident = *((long*)buf);
642
643    // Ogg vorbis?
644    if (ident == 0x5367674f) // 'OggS'
645        return VORBIS_PLAYER;
646
647    // Some kind of MIDI?
648    EAS_DATA_HANDLE easdata;
649    if (EAS_Init(&easdata) == EAS_SUCCESS) {
650        EAS_FILE locator;
651        locator.path = NULL;
652        locator.fd = fd;
653        locator.offset = offset;
654        locator.length = length;
655        EAS_HANDLE  eashandle;
656        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
657            EAS_CloseFile(easdata, eashandle);
658            EAS_Shutdown(easdata);
659            return SONIVOX_PLAYER;
660        }
661        EAS_Shutdown(easdata);
662    }
663
664    return getDefaultPlayerType();
665}
666
667player_type getPlayerType(const char* url)
668{
669    if (TestPlayerStub::canBeUsed(url)) {
670        return TEST_PLAYER;
671    }
672
673    // use MidiFile for MIDI extensions
674    int lenURL = strlen(url);
675    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
676        int len = strlen(FILE_EXTS[i].extension);
677        int start = lenURL - len;
678        if (start > 0) {
679            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
680                return FILE_EXTS[i].playertype;
681            }
682        }
683    }
684
685    return getDefaultPlayerType();
686}
687
688static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
689        notify_callback_f notifyFunc)
690{
691    sp<MediaPlayerBase> p;
692    switch (playerType) {
693#ifndef NO_OPENCORE
694        case PV_PLAYER:
695            LOGV(" create PVPlayer");
696            p = new PVPlayer();
697            break;
698#endif
699        case SONIVOX_PLAYER:
700            LOGV(" create MidiFile");
701            p = new MidiFile();
702            break;
703        case VORBIS_PLAYER:
704            LOGV(" create VorbisPlayer");
705            p = new VorbisPlayer();
706            break;
707#if BUILD_WITH_FULL_STAGEFRIGHT
708        case STAGEFRIGHT_PLAYER:
709            LOGV(" create StagefrightPlayer");
710            p = new StagefrightPlayer;
711            break;
712#endif
713        case TEST_PLAYER:
714            LOGV("Create Test Player stub");
715            p = new TestPlayerStub();
716            break;
717    }
718    if (p != NULL) {
719        if (p->initCheck() == NO_ERROR) {
720            p->setNotifyCallback(cookie, notifyFunc);
721        } else {
722            p.clear();
723        }
724    }
725    if (p == NULL) {
726        LOGE("Failed to create player object");
727    }
728    return p;
729}
730
731sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
732{
733    // determine if we have the right player type
734    sp<MediaPlayerBase> p = mPlayer;
735    if ((p != NULL) && (p->playerType() != playerType)) {
736        LOGV("delete player");
737        p.clear();
738    }
739    if (p == NULL) {
740        p = android::createPlayer(playerType, this, notify);
741    }
742    return p;
743}
744
745status_t MediaPlayerService::Client::setDataSource(const char *url)
746{
747    LOGV("setDataSource(%s)", url);
748    if (url == NULL)
749        return UNKNOWN_ERROR;
750
751    if (strncmp(url, "content://", 10) == 0) {
752        // get a filedescriptor for the content Uri and
753        // pass it to the setDataSource(fd) method
754
755        String16 url16(url);
756        int fd = android::openContentProviderFile(url16);
757        if (fd < 0)
758        {
759            LOGE("Couldn't open fd for %s", url);
760            return UNKNOWN_ERROR;
761        }
762        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
763        close(fd);
764        return mStatus;
765    } else {
766        player_type playerType = getPlayerType(url);
767        LOGV("player type = %d", playerType);
768
769        // create the right type of player
770        sp<MediaPlayerBase> p = createPlayer(playerType);
771        if (p == NULL) return NO_INIT;
772
773        if (!p->hardwareOutput()) {
774            mAudioOutput = new AudioOutput();
775            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
776        }
777
778        // now set data source
779        LOGV(" setDataSource");
780        mStatus = p->setDataSource(url);
781        if (mStatus == NO_ERROR) {
782            mPlayer = p;
783        } else {
784            LOGE("  error: %d", mStatus);
785        }
786        return mStatus;
787    }
788}
789
790status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
791{
792    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
793    struct stat sb;
794    int ret = fstat(fd, &sb);
795    if (ret != 0) {
796        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
797        return UNKNOWN_ERROR;
798    }
799
800    LOGV("st_dev  = %llu", sb.st_dev);
801    LOGV("st_mode = %u", sb.st_mode);
802    LOGV("st_uid  = %lu", sb.st_uid);
803    LOGV("st_gid  = %lu", sb.st_gid);
804    LOGV("st_size = %llu", sb.st_size);
805
806    if (offset >= sb.st_size) {
807        LOGE("offset error");
808        ::close(fd);
809        return UNKNOWN_ERROR;
810    }
811    if (offset + length > sb.st_size) {
812        length = sb.st_size - offset;
813        LOGV("calculated length = %lld", length);
814    }
815
816    player_type playerType = getPlayerType(fd, offset, length);
817    LOGV("player type = %d", playerType);
818
819    // create the right type of player
820    sp<MediaPlayerBase> p = createPlayer(playerType);
821    if (p == NULL) return NO_INIT;
822
823    if (!p->hardwareOutput()) {
824        mAudioOutput = new AudioOutput();
825        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
826    }
827
828    // now set data source
829    mStatus = p->setDataSource(fd, offset, length);
830    if (mStatus == NO_ERROR) mPlayer = p;
831    return mStatus;
832}
833
834status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
835{
836    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
837    sp<MediaPlayerBase> p = getPlayer();
838    if (p == 0) return UNKNOWN_ERROR;
839    return p->setVideoSurface(surface);
840}
841
842status_t MediaPlayerService::Client::invoke(const Parcel& request,
843                                            Parcel *reply)
844{
845    sp<MediaPlayerBase> p = getPlayer();
846    if (p == NULL) return UNKNOWN_ERROR;
847    return p->invoke(request, reply);
848}
849
850// This call doesn't need to access the native player.
851status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
852{
853    status_t status;
854    media::Metadata::Filter allow, drop;
855
856    if (unmarshallFilter(filter, &allow, &status) &&
857        unmarshallFilter(filter, &drop, &status)) {
858        Mutex::Autolock lock(mLock);
859
860        mMetadataAllow = allow;
861        mMetadataDrop = drop;
862    }
863    return status;
864}
865
866status_t MediaPlayerService::Client::getMetadata(
867        bool update_only, bool apply_filter, Parcel *reply)
868{
869    sp<MediaPlayerBase> player = getPlayer();
870    if (player == 0) return UNKNOWN_ERROR;
871
872    status_t status;
873    // Placeholder for the return code, updated by the caller.
874    reply->writeInt32(-1);
875
876    media::Metadata::Filter ids;
877
878    // We don't block notifications while we fetch the data. We clear
879    // mMetadataUpdated first so we don't lose notifications happening
880    // during the rest of this call.
881    {
882        Mutex::Autolock lock(mLock);
883        if (update_only) {
884            ids = mMetadataUpdated;
885        }
886        mMetadataUpdated.clear();
887    }
888
889    media::Metadata metadata(reply);
890
891    metadata.appendHeader();
892    status = player->getMetadata(ids, reply);
893
894    if (status != OK) {
895        metadata.resetParcel();
896        LOGE("getMetadata failed %d", status);
897        return status;
898    }
899
900    // FIXME: Implement filtering on the result. Not critical since
901    // filtering takes place on the update notifications already. This
902    // would be when all the metadata are fetch and a filter is set.
903
904    // Everything is fine, update the metadata length.
905    metadata.updateLength();
906    return OK;
907}
908
909status_t MediaPlayerService::Client::prepareAsync()
910{
911    LOGV("[%d] prepareAsync", mConnId);
912    sp<MediaPlayerBase> p = getPlayer();
913    if (p == 0) return UNKNOWN_ERROR;
914    status_t ret = p->prepareAsync();
915#if CALLBACK_ANTAGONIZER
916    LOGD("start Antagonizer");
917    if (ret == NO_ERROR) mAntagonizer->start();
918#endif
919    return ret;
920}
921
922status_t MediaPlayerService::Client::start()
923{
924    LOGV("[%d] start", mConnId);
925    sp<MediaPlayerBase> p = getPlayer();
926    if (p == 0) return UNKNOWN_ERROR;
927    p->setLooping(mLoop);
928    return p->start();
929}
930
931status_t MediaPlayerService::Client::stop()
932{
933    LOGV("[%d] stop", mConnId);
934    sp<MediaPlayerBase> p = getPlayer();
935    if (p == 0) return UNKNOWN_ERROR;
936    return p->stop();
937}
938
939status_t MediaPlayerService::Client::pause()
940{
941    LOGV("[%d] pause", mConnId);
942    sp<MediaPlayerBase> p = getPlayer();
943    if (p == 0) return UNKNOWN_ERROR;
944    return p->pause();
945}
946
947status_t MediaPlayerService::Client::isPlaying(bool* state)
948{
949    *state = false;
950    sp<MediaPlayerBase> p = getPlayer();
951    if (p == 0) return UNKNOWN_ERROR;
952    *state = p->isPlaying();
953    LOGV("[%d] isPlaying: %d", mConnId, *state);
954    return NO_ERROR;
955}
956
957status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
958{
959    LOGV("getCurrentPosition");
960    sp<MediaPlayerBase> p = getPlayer();
961    if (p == 0) return UNKNOWN_ERROR;
962    status_t ret = p->getCurrentPosition(msec);
963    if (ret == NO_ERROR) {
964        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
965    } else {
966        LOGE("getCurrentPosition returned %d", ret);
967    }
968    return ret;
969}
970
971status_t MediaPlayerService::Client::getDuration(int *msec)
972{
973    LOGV("getDuration");
974    sp<MediaPlayerBase> p = getPlayer();
975    if (p == 0) return UNKNOWN_ERROR;
976    status_t ret = p->getDuration(msec);
977    if (ret == NO_ERROR) {
978        LOGV("[%d] getDuration = %d", mConnId, *msec);
979    } else {
980        LOGE("getDuration returned %d", ret);
981    }
982    return ret;
983}
984
985status_t MediaPlayerService::Client::seekTo(int msec)
986{
987    LOGV("[%d] seekTo(%d)", mConnId, msec);
988    sp<MediaPlayerBase> p = getPlayer();
989    if (p == 0) return UNKNOWN_ERROR;
990    return p->seekTo(msec);
991}
992
993status_t MediaPlayerService::Client::reset()
994{
995    LOGV("[%d] reset", mConnId);
996    sp<MediaPlayerBase> p = getPlayer();
997    if (p == 0) return UNKNOWN_ERROR;
998    return p->reset();
999}
1000
1001status_t MediaPlayerService::Client::setAudioStreamType(int type)
1002{
1003    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1004    // TODO: for hardware output, call player instead
1005    Mutex::Autolock l(mLock);
1006    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1007    return NO_ERROR;
1008}
1009
1010status_t MediaPlayerService::Client::setLooping(int loop)
1011{
1012    LOGV("[%d] setLooping(%d)", mConnId, loop);
1013    mLoop = loop;
1014    sp<MediaPlayerBase> p = getPlayer();
1015    if (p != 0) return p->setLooping(loop);
1016    return NO_ERROR;
1017}
1018
1019status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1020{
1021    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1022    // TODO: for hardware output, call player instead
1023    Mutex::Autolock l(mLock);
1024    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1025    return NO_ERROR;
1026}
1027
1028
1029void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1030{
1031    Client* client = static_cast<Client*>(cookie);
1032
1033    if (MEDIA_INFO == msg &&
1034        MEDIA_INFO_METADATA_UPDATE == ext1) {
1035        const media::Metadata::Type metadata_type = ext2;
1036
1037        if(client->shouldDropMetadata(metadata_type)) {
1038            return;
1039        }
1040
1041        // Update the list of metadata that have changed. getMetadata
1042        // also access mMetadataUpdated and clears it.
1043        client->addNewMetadataUpdate(metadata_type);
1044    }
1045    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1046    client->mClient->notify(msg, ext1, ext2);
1047}
1048
1049
1050bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1051{
1052    Mutex::Autolock lock(mLock);
1053
1054    if (findMetadata(mMetadataDrop, code)) {
1055        return true;
1056    }
1057
1058    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1059        return false;
1060    } else {
1061        return true;
1062    }
1063}
1064
1065
1066void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1067    Mutex::Autolock lock(mLock);
1068    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1069        mMetadataUpdated.add(metadata_type);
1070    }
1071}
1072
1073#if CALLBACK_ANTAGONIZER
1074const int Antagonizer::interval = 10000; // 10 msecs
1075
1076Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1077    mExit(false), mActive(false), mClient(client), mCb(cb)
1078{
1079    createThread(callbackThread, this);
1080}
1081
1082void Antagonizer::kill()
1083{
1084    Mutex::Autolock _l(mLock);
1085    mActive = false;
1086    mExit = true;
1087    mCondition.wait(mLock);
1088}
1089
1090int Antagonizer::callbackThread(void* user)
1091{
1092    LOGD("Antagonizer started");
1093    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1094    while (!p->mExit) {
1095        if (p->mActive) {
1096            LOGV("send event");
1097            p->mCb(p->mClient, 0, 0, 0);
1098        }
1099        usleep(interval);
1100    }
1101    Mutex::Autolock _l(p->mLock);
1102    p->mCondition.signal();
1103    LOGD("Antagonizer stopped");
1104    return 0;
1105}
1106#endif
1107
1108static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1109
1110sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1111{
1112    LOGV("decode(%s)", url);
1113    sp<MemoryBase> mem;
1114    sp<MediaPlayerBase> player;
1115
1116    // Protect our precious, precious DRMd ringtones by only allowing
1117    // decoding of http, but not filesystem paths or content Uris.
1118    // If the application wants to decode those, it should open a
1119    // filedescriptor for them and use that.
1120    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1121        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1122        return mem;
1123    }
1124
1125    player_type playerType = getPlayerType(url);
1126    LOGV("player type = %d", playerType);
1127
1128    // create the right type of player
1129    sp<AudioCache> cache = new AudioCache(url);
1130    player = android::createPlayer(playerType, cache.get(), cache->notify);
1131    if (player == NULL) goto Exit;
1132    if (player->hardwareOutput()) goto Exit;
1133
1134    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1135
1136    // set data source
1137    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1138
1139    LOGV("prepare");
1140    player->prepareAsync();
1141
1142    LOGV("wait for prepare");
1143    if (cache->wait() != NO_ERROR) goto Exit;
1144
1145    LOGV("start");
1146    player->start();
1147
1148    LOGV("wait for playback complete");
1149    if (cache->wait() != NO_ERROR) goto Exit;
1150
1151    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1152    *pSampleRate = cache->sampleRate();
1153    *pNumChannels = cache->channelCount();
1154    *pFormat = cache->format();
1155    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1156
1157Exit:
1158    if (player != 0) player->reset();
1159    return mem;
1160}
1161
1162sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1163{
1164    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1165    sp<MemoryBase> mem;
1166    sp<MediaPlayerBase> player;
1167
1168    player_type playerType = getPlayerType(fd, offset, length);
1169    LOGV("player type = %d", playerType);
1170
1171    // create the right type of player
1172    sp<AudioCache> cache = new AudioCache("decode_fd");
1173    player = android::createPlayer(playerType, cache.get(), cache->notify);
1174    if (player == NULL) goto Exit;
1175    if (player->hardwareOutput()) goto Exit;
1176
1177    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1178
1179    // set data source
1180    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1181
1182    LOGV("prepare");
1183    player->prepareAsync();
1184
1185    LOGV("wait for prepare");
1186    if (cache->wait() != NO_ERROR) goto Exit;
1187
1188    LOGV("start");
1189    player->start();
1190
1191    LOGV("wait for playback complete");
1192    if (cache->wait() != NO_ERROR) goto Exit;
1193
1194    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1195    *pSampleRate = cache->sampleRate();
1196    *pNumChannels = cache->channelCount();
1197    *pFormat = cache->format();
1198    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1199
1200Exit:
1201    if (player != 0) player->reset();
1202    ::close(fd);
1203    return mem;
1204}
1205
1206/*
1207 * Avert your eyes, ugly hack ahead.
1208 * The following is to support music visualizations.
1209 */
1210
1211static const int NUMVIZBUF = 32;
1212static const int VIZBUFFRAMES = 1024;
1213static const int TOTALBUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1214
1215static bool gotMem = false;
1216static sp<MemoryBase> mem[NUMVIZBUF];
1217static uint64_t timeStamp[NUMVIZBUF];
1218static uint64_t lastReadTime;
1219static uint64_t lastWriteTime;
1220static int writeIdx = 0;
1221
1222static void allocVizBufs() {
1223    if (!gotMem) {
1224        for (int i=0;i<NUMVIZBUF;i++) {
1225            sp<MemoryHeapBase> heap = new MemoryHeapBase(VIZBUFFRAMES*2, 0, "snooper");
1226            mem[i] = new MemoryBase(heap, 0, heap->getSize());
1227            timeStamp[i] = 0;
1228        }
1229        gotMem = true;
1230    }
1231}
1232
1233
1234/*
1235 * Get a buffer of audio data that is about to be played.
1236 * We don't synchronize this because in practice the writer
1237 * is ahead of the reader, and even if we did happen to catch
1238 * a buffer while it's being written, it's just a visualization,
1239 * so no harm done.
1240 */
1241static sp<MemoryBase> getVizBuffer() {
1242
1243    allocVizBufs();
1244
1245    lastReadTime = uptimeMillis() + 100; // account for renderer delay (we shouldn't be doing this here)
1246
1247    // if there is no recent buffer (yet), just return empty handed
1248    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1249        //LOGI("@@@@    no audio data to look at yet");
1250        return NULL;
1251    }
1252
1253    char buf[200];
1254
1255    int closestIdx = -1;
1256    uint32_t closestTime = 0x7ffffff;
1257
1258    for (int i = 0; i < NUMVIZBUF; i++) {
1259        uint64_t tsi = timeStamp[i];
1260        uint64_t diff = tsi > lastReadTime ? tsi - lastReadTime : lastReadTime - tsi;
1261        if (diff < closestTime) {
1262            closestIdx = i;
1263            closestTime = diff;
1264        }
1265    }
1266
1267
1268    if (closestIdx >= 0) {
1269        //LOGI("@@@ return buffer %d, %d/%d", closestIdx, uint32_t(lastReadTime), uint32_t(timeStamp[closestIdx]));
1270        return mem[closestIdx];
1271    }
1272
1273    // we won't get here, since we either bailed out early, or got a buffer
1274    LOGD("Didn't expect to be here");
1275    return NULL;
1276}
1277
1278static void storeVizBuf(const void *data, int len, uint64_t time) {
1279    // Copy the data in to the visualizer buffer
1280    // Assume a 16 bit stereo source for now.
1281    short *viz = (short*)mem[writeIdx]->pointer();
1282    short *src = (short*)data;
1283    for (int i = 0; i < VIZBUFFRAMES; i++) {
1284        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1285        // This should still be good enough for a visualization
1286        *viz++ = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1287        src += 2;
1288    }
1289    timeStamp[writeIdx++] = time;
1290    if (writeIdx >= NUMVIZBUF) {
1291        writeIdx = 0;
1292    }
1293}
1294
1295static void makeVizBuffers(const char *data, int len, uint64_t time) {
1296
1297    allocVizBufs();
1298
1299    uint64_t startTime = time;
1300    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1301    while (len >= VIZBUFFRAMES * frameSize) {
1302        storeVizBuf(data, len, time);
1303        data += VIZBUFFRAMES * frameSize;
1304        len -= VIZBUFFRAMES * frameSize;
1305        time += 1000 * VIZBUFFRAMES / 44100;
1306    }
1307    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1308}
1309
1310sp<IMemory> MediaPlayerService::snoop()
1311{
1312    sp<MemoryBase> mem = getVizBuffer();
1313    return mem;
1314}
1315
1316
1317#undef LOG_TAG
1318#define LOG_TAG "AudioSink"
1319MediaPlayerService::AudioOutput::AudioOutput()
1320    : mCallback(NULL),
1321      mCallbackCookie(NULL) {
1322    mTrack = 0;
1323    mStreamType = AudioSystem::MUSIC;
1324    mLeftVolume = 1.0;
1325    mRightVolume = 1.0;
1326    mLatency = 0;
1327    mMsecsPerFrame = 0;
1328    mNumFramesWritten = 0;
1329    setMinBufferCount();
1330}
1331
1332MediaPlayerService::AudioOutput::~AudioOutput()
1333{
1334    close();
1335}
1336
1337void MediaPlayerService::AudioOutput::setMinBufferCount()
1338{
1339    char value[PROPERTY_VALUE_MAX];
1340    if (property_get("ro.kernel.qemu", value, 0)) {
1341        mIsOnEmulator = true;
1342        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1343    }
1344}
1345
1346bool MediaPlayerService::AudioOutput::isOnEmulator()
1347{
1348    setMinBufferCount();
1349    return mIsOnEmulator;
1350}
1351
1352int MediaPlayerService::AudioOutput::getMinBufferCount()
1353{
1354    setMinBufferCount();
1355    return mMinBufferCount;
1356}
1357
1358ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1359{
1360    if (mTrack == 0) return NO_INIT;
1361    return mTrack->frameCount() * frameSize();
1362}
1363
1364ssize_t MediaPlayerService::AudioOutput::frameCount() const
1365{
1366    if (mTrack == 0) return NO_INIT;
1367    return mTrack->frameCount();
1368}
1369
1370ssize_t MediaPlayerService::AudioOutput::channelCount() const
1371{
1372    if (mTrack == 0) return NO_INIT;
1373    return mTrack->channelCount();
1374}
1375
1376ssize_t MediaPlayerService::AudioOutput::frameSize() const
1377{
1378    if (mTrack == 0) return NO_INIT;
1379    return mTrack->frameSize();
1380}
1381
1382uint32_t MediaPlayerService::AudioOutput::latency () const
1383{
1384    return mLatency;
1385}
1386
1387float MediaPlayerService::AudioOutput::msecsPerFrame() const
1388{
1389    return mMsecsPerFrame;
1390}
1391
1392status_t MediaPlayerService::AudioOutput::open(
1393        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1394        AudioCallback cb, void *cookie)
1395{
1396    mCallback = cb;
1397    mCallbackCookie = cookie;
1398
1399    // Check argument "bufferCount" against the mininum buffer count
1400    if (bufferCount < mMinBufferCount) {
1401        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1402        bufferCount = mMinBufferCount;
1403
1404    }
1405    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1406    if (mTrack) close();
1407    int afSampleRate;
1408    int afFrameCount;
1409    int frameCount;
1410
1411    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1412        return NO_INIT;
1413    }
1414    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1415        return NO_INIT;
1416    }
1417
1418    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1419
1420    AudioTrack *t;
1421    if (mCallback != NULL) {
1422        t = new AudioTrack(
1423                mStreamType,
1424                sampleRate,
1425                format,
1426                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1427                frameCount,
1428                0 /* flags */,
1429                CallbackWrapper,
1430                this);
1431    } else {
1432        t = new AudioTrack(
1433                mStreamType,
1434                sampleRate,
1435                format,
1436                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1437                frameCount);
1438    }
1439
1440    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1441        LOGE("Unable to create audio track");
1442        delete t;
1443        return NO_INIT;
1444    }
1445
1446    LOGV("setVolume");
1447    t->setVolume(mLeftVolume, mRightVolume);
1448    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1449    mLatency = t->latency() + kAudioVideoDelayMs;
1450    mTrack = t;
1451    return NO_ERROR;
1452}
1453
1454void MediaPlayerService::AudioOutput::start()
1455{
1456    LOGV("start");
1457    if (mTrack) {
1458        mTrack->setVolume(mLeftVolume, mRightVolume);
1459        mTrack->start();
1460        mTrack->getPosition(&mNumFramesWritten);
1461    }
1462}
1463
1464ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1465{
1466    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1467
1468    //LOGV("write(%p, %u)", buffer, size);
1469    if (mTrack) {
1470        // Only make visualization buffers if anyone recently requested visualization data
1471        uint64_t now = uptimeMillis();
1472        if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1473            // Based on the current play counter, the number of frames written and
1474            // the current real time we can calculate the approximate real start
1475            // time of the buffer we're about to write.
1476            uint32_t pos;
1477            mTrack->getPosition(&pos);
1478
1479            // we're writing ahead by this many frames:
1480            int ahead = mNumFramesWritten - pos;
1481            //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1482            // which is this many milliseconds, assuming 44100 Hz:
1483            ahead /= 44;
1484
1485            makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1486            lastWriteTime = now;
1487        }
1488        ssize_t ret = mTrack->write(buffer, size);
1489        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1490        return ret;
1491    }
1492    return NO_INIT;
1493}
1494
1495void MediaPlayerService::AudioOutput::stop()
1496{
1497    LOGV("stop");
1498    if (mTrack) mTrack->stop();
1499    lastWriteTime = 0;
1500}
1501
1502void MediaPlayerService::AudioOutput::flush()
1503{
1504    LOGV("flush");
1505    if (mTrack) mTrack->flush();
1506}
1507
1508void MediaPlayerService::AudioOutput::pause()
1509{
1510    LOGV("pause");
1511    if (mTrack) mTrack->pause();
1512}
1513
1514void MediaPlayerService::AudioOutput::close()
1515{
1516    LOGV("close");
1517    delete mTrack;
1518    mTrack = 0;
1519}
1520
1521void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1522{
1523    LOGV("setVolume(%f, %f)", left, right);
1524    mLeftVolume = left;
1525    mRightVolume = right;
1526    if (mTrack) {
1527        mTrack->setVolume(left, right);
1528    }
1529}
1530
1531// static
1532void MediaPlayerService::AudioOutput::CallbackWrapper(
1533        int event, void *cookie, void *info) {
1534    if (event != AudioTrack::EVENT_MORE_DATA) {
1535        return;
1536    }
1537
1538    AudioOutput *me = (AudioOutput *)cookie;
1539    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1540
1541    (*me->mCallback)(
1542            me, buffer->raw, buffer->size, me->mCallbackCookie);
1543}
1544
1545#undef LOG_TAG
1546#define LOG_TAG "AudioCache"
1547MediaPlayerService::AudioCache::AudioCache(const char* name) :
1548    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1549    mError(NO_ERROR), mCommandComplete(false)
1550{
1551    // create ashmem heap
1552    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1553}
1554
1555uint32_t MediaPlayerService::AudioCache::latency () const
1556{
1557    return 0;
1558}
1559
1560float MediaPlayerService::AudioCache::msecsPerFrame() const
1561{
1562    return mMsecsPerFrame;
1563}
1564
1565status_t MediaPlayerService::AudioCache::open(
1566        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1567        AudioCallback cb, void *cookie)
1568{
1569    if (cb != NULL) {
1570        return UNKNOWN_ERROR;  // TODO: implement this.
1571    }
1572
1573    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1574    if (mHeap->getHeapID() < 0) return NO_INIT;
1575    mSampleRate = sampleRate;
1576    mChannelCount = (uint16_t)channelCount;
1577    mFormat = (uint16_t)format;
1578    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1579    return NO_ERROR;
1580}
1581
1582ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1583{
1584    LOGV("write(%p, %u)", buffer, size);
1585    if ((buffer == 0) || (size == 0)) return size;
1586
1587    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1588    if (p == NULL) return NO_INIT;
1589    p += mSize;
1590    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1591    if (mSize + size > mHeap->getSize()) {
1592        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1593        size = mHeap->getSize() - mSize;
1594    }
1595    memcpy(p, buffer, size);
1596    mSize += size;
1597    return size;
1598}
1599
1600// call with lock held
1601status_t MediaPlayerService::AudioCache::wait()
1602{
1603    Mutex::Autolock lock(mLock);
1604    if (!mCommandComplete) {
1605        mSignal.wait(mLock);
1606    }
1607    mCommandComplete = false;
1608
1609    if (mError == NO_ERROR) {
1610        LOGV("wait - success");
1611    } else {
1612        LOGV("wait - error");
1613    }
1614    return mError;
1615}
1616
1617void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1618{
1619    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1620    AudioCache* p = static_cast<AudioCache*>(cookie);
1621
1622    // ignore buffering messages
1623    if (msg == MEDIA_BUFFERING_UPDATE) return;
1624
1625    // set error condition
1626    if (msg == MEDIA_ERROR) {
1627        LOGE("Error %d, %d occurred", ext1, ext2);
1628        p->mError = ext1;
1629    }
1630
1631    // wake up thread
1632    LOGV("wakeup thread");
1633    p->mCommandComplete = true;
1634    p->mSignal.signal();
1635}
1636
1637} // namespace android
1638