MediaPlayerService.cpp revision 1eea7f529c1c25901a7749fed4792ed68379d841 
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(pid);
229#else
230    sp<MediaRecorderClient> recorder = NULL;
231#endif
232    LOGV("Create new media recorder client from pid %d", pid);
233    return recorder;
234}
235
236sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
237{
238    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
239    LOGV("Create new media retriever from pid %d", pid);
240    return retriever;
241}
242
243sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
244{
245    int32_t connId = android_atomic_inc(&mNextConnId);
246    sp<Client> c = new Client(this, pid, connId, client);
247    LOGV("Create new client(%d) from pid %d, url=%s, connId=%d", connId, pid, url, connId);
248    if (NO_ERROR != c->setDataSource(url))
249    {
250        c.clear();
251        return c;
252    }
253    wp<Client> w = c;
254    Mutex::Autolock lock(mLock);
255    mClients.add(w);
256    return c;
257}
258
259sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
260        int fd, int64_t offset, int64_t length)
261{
262    int32_t connId = android_atomic_inc(&mNextConnId);
263    sp<Client> c = new Client(this, pid, connId, client);
264    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
265            connId, pid, fd, offset, length);
266    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
267        c.clear();
268    } else {
269        wp<Client> w = c;
270        Mutex::Autolock lock(mLock);
271        mClients.add(w);
272    }
273    ::close(fd);
274    return c;
275}
276
277sp<IOMX> MediaPlayerService::getOMX() {
278    Mutex::Autolock autoLock(mLock);
279
280    if (mOMX.get() == NULL) {
281        mOMX = new OMX;
282    }
283
284    return mOMX;
285}
286
287status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
288{
289    const size_t SIZE = 256;
290    char buffer[SIZE];
291    String8 result;
292
293    result.append(" AudioCache\n");
294    if (mHeap != 0) {
295        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
296                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
297        result.append(buffer);
298    }
299    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
300            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
301    result.append(buffer);
302    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
303            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
304    result.append(buffer);
305    ::write(fd, result.string(), result.size());
306    return NO_ERROR;
307}
308
309status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
310{
311    const size_t SIZE = 256;
312    char buffer[SIZE];
313    String8 result;
314
315    result.append(" AudioOutput\n");
316    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
317            mStreamType, mLeftVolume, mRightVolume);
318    result.append(buffer);
319    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
320            mMsecsPerFrame, mLatency);
321    result.append(buffer);
322    ::write(fd, result.string(), result.size());
323    if (mTrack != 0) {
324        mTrack->dump(fd, args);
325    }
326    return NO_ERROR;
327}
328
329status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
330{
331    const size_t SIZE = 256;
332    char buffer[SIZE];
333    String8 result;
334    result.append(" Client\n");
335    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
336            mPid, mConnId, mStatus, mLoop?"true": "false");
337    result.append(buffer);
338    write(fd, result.string(), result.size());
339    if (mAudioOutput != 0) {
340        mAudioOutput->dump(fd, args);
341    }
342    write(fd, "\n", 1);
343    return NO_ERROR;
344}
345
346static int myTid() {
347#ifdef HAVE_GETTID
348    return gettid();
349#else
350    return getpid();
351#endif
352}
353
354#if defined(__arm__)
355extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
356        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
357extern "C" void free_malloc_leak_info(uint8_t* info);
358
359// Use the String-class below instead of String8 to allocate all memory
360// beforehand and not reenter the heap while we are examining it...
361struct MyString8 {
362    static const size_t MAX_SIZE = 256 * 1024;
363
364    MyString8()
365        : mPtr((char *)malloc(MAX_SIZE)) {
366        *mPtr = '\0';
367    }
368
369    ~MyString8() {
370        free(mPtr);
371    }
372
373    void append(const char *s) {
374        strcat(mPtr, s);
375    }
376
377    const char *string() const {
378        return mPtr;
379    }
380
381    size_t size() const {
382        return strlen(mPtr);
383    }
384
385private:
386    char *mPtr;
387
388    MyString8(const MyString8 &);
389    MyString8 &operator=(const MyString8 &);
390};
391
392void memStatus(int fd, const Vector<String16>& args)
393{
394    const size_t SIZE = 256;
395    char buffer[SIZE];
396    MyString8 result;
397
398    typedef struct {
399        size_t size;
400        size_t dups;
401        intptr_t * backtrace;
402    } AllocEntry;
403
404    uint8_t *info = NULL;
405    size_t overallSize = 0;
406    size_t infoSize = 0;
407    size_t totalMemory = 0;
408    size_t backtraceSize = 0;
409
410    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
411    if (info) {
412        uint8_t *ptr = info;
413        size_t count = overallSize / infoSize;
414
415        snprintf(buffer, SIZE, " Allocation count %i\n", count);
416        result.append(buffer);
417
418        AllocEntry * entries = new AllocEntry[count];
419
420        for (size_t i = 0; i < count; i++) {
421            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
422            AllocEntry *e = &entries[i];
423
424            e->size = *reinterpret_cast<size_t *>(ptr);
425            ptr += sizeof(size_t);
426
427            e->dups = *reinterpret_cast<size_t *>(ptr);
428            ptr += sizeof(size_t);
429
430            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
431            ptr += sizeof(intptr_t) * backtraceSize;
432        }
433
434        // Now we need to sort the entries.  They come sorted by size but
435        // not by stack trace which causes problems using diff.
436        bool moved;
437        do {
438            moved = false;
439            for (size_t i = 0; i < (count - 1); i++) {
440                AllocEntry *e1 = &entries[i];
441                AllocEntry *e2 = &entries[i+1];
442
443                bool swap = e1->size < e2->size;
444                if (e1->size == e2->size) {
445                    for(size_t j = 0; j < backtraceSize; j++) {
446                        if (e1->backtrace[j] == e2->backtrace[j]) {
447                            continue;
448                        }
449                        swap = e1->backtrace[j] < e2->backtrace[j];
450                        break;
451                    }
452                }
453                if (swap) {
454                    AllocEntry t = entries[i];
455                    entries[i] = entries[i+1];
456                    entries[i+1] = t;
457                    moved = true;
458                }
459            }
460        } while (moved);
461
462        for (size_t i = 0; i < count; i++) {
463            AllocEntry *e = &entries[i];
464
465            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
466            result.append(buffer);
467            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
468                if (ct) {
469                    result.append(", ");
470                }
471                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
472                result.append(buffer);
473            }
474            result.append("\n");
475        }
476
477        delete[] entries;
478        free_malloc_leak_info(info);
479    }
480
481    write(fd, result.string(), result.size());
482}
483#endif
484
485status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
486{
487    const size_t SIZE = 256;
488    char buffer[SIZE];
489    String8 result;
490    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
491        snprintf(buffer, SIZE, "Permission Denial: "
492                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
493                IPCThreadState::self()->getCallingPid(),
494                IPCThreadState::self()->getCallingUid());
495        result.append(buffer);
496    } else {
497        Mutex::Autolock lock(mLock);
498        for (int i = 0, n = mClients.size(); i < n; ++i) {
499            sp<Client> c = mClients[i].promote();
500            if (c != 0) c->dump(fd, args);
501        }
502        result.append(" Files opened and/or mapped:\n");
503        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
504        FILE *f = fopen(buffer, "r");
505        if (f) {
506            while (!feof(f)) {
507                fgets(buffer, SIZE, f);
508                if (strstr(buffer, " /sdcard/") ||
509                    strstr(buffer, " /system/sounds/") ||
510                    strstr(buffer, " /system/media/")) {
511                    result.append("  ");
512                    result.append(buffer);
513                }
514            }
515            fclose(f);
516        } else {
517            result.append("couldn't open ");
518            result.append(buffer);
519            result.append("\n");
520        }
521
522        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
523        DIR *d = opendir(buffer);
524        if (d) {
525            struct dirent *ent;
526            while((ent = readdir(d)) != NULL) {
527                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
528                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
529                    struct stat s;
530                    if (lstat(buffer, &s) == 0) {
531                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
532                            char linkto[256];
533                            int len = readlink(buffer, linkto, sizeof(linkto));
534                            if(len > 0) {
535                                if(len > 255) {
536                                    linkto[252] = '.';
537                                    linkto[253] = '.';
538                                    linkto[254] = '.';
539                                    linkto[255] = 0;
540                                } else {
541                                    linkto[len] = 0;
542                                }
543                                if (strstr(linkto, "/sdcard/") == linkto ||
544                                    strstr(linkto, "/system/sounds/") == linkto ||
545                                    strstr(linkto, "/system/media/") == linkto) {
546                                    result.append("  ");
547                                    result.append(buffer);
548                                    result.append(" -> ");
549                                    result.append(linkto);
550                                    result.append("\n");
551                                }
552                            }
553                        } else {
554                            result.append("  unexpected type for ");
555                            result.append(buffer);
556                            result.append("\n");
557                        }
558                    }
559                }
560            }
561            closedir(d);
562        } else {
563            result.append("couldn't open ");
564            result.append(buffer);
565            result.append("\n");
566        }
567
568#if defined(__arm__)
569        bool dumpMem = false;
570        for (size_t i = 0; i < args.size(); i++) {
571            if (args[i] == String16("-m")) {
572                dumpMem = true;
573            }
574        }
575        if (dumpMem) {
576            memStatus(fd, args);
577        }
578#endif
579    }
580    write(fd, result.string(), result.size());
581    return NO_ERROR;
582}
583
584void MediaPlayerService::removeClient(wp<Client> client)
585{
586    Mutex::Autolock lock(mLock);
587    mClients.remove(client);
588}
589
590MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
591        int32_t connId, const sp<IMediaPlayerClient>& client)
592{
593    LOGV("Client(%d) constructor", connId);
594    mPid = pid;
595    mConnId = connId;
596    mService = service;
597    mClient = client;
598    mLoop = false;
599    mStatus = NO_INIT;
600#if CALLBACK_ANTAGONIZER
601    LOGD("create Antagonizer");
602    mAntagonizer = new Antagonizer(notify, this);
603#endif
604}
605
606MediaPlayerService::Client::~Client()
607{
608    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
609    mAudioOutput.clear();
610    wp<Client> client(this);
611    disconnect();
612    mService->removeClient(client);
613}
614
615void MediaPlayerService::Client::disconnect()
616{
617    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
618    // grab local reference and clear main reference to prevent future
619    // access to object
620    sp<MediaPlayerBase> p;
621    {
622        Mutex::Autolock l(mLock);
623        p = mPlayer;
624    }
625    mClient.clear();
626
627    mPlayer.clear();
628
629    // clear the notification to prevent callbacks to dead client
630    // and reset the player. We assume the player will serialize
631    // access to itself if necessary.
632    if (p != 0) {
633        p->setNotifyCallback(0, 0);
634#if CALLBACK_ANTAGONIZER
635        LOGD("kill Antagonizer");
636        mAntagonizer->kill();
637#endif
638        p->reset();
639    }
640
641    IPCThreadState::self()->flushCommands();
642}
643
644static player_type getDefaultPlayerType() {
645#if BUILD_WITH_FULL_STAGEFRIGHT
646    char value[PROPERTY_VALUE_MAX];
647    if (property_get("media.stagefright.enable-player", value, NULL)
648        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
649        return STAGEFRIGHT_PLAYER;
650    }
651#endif
652
653    return PV_PLAYER;
654}
655
656player_type getPlayerType(int fd, int64_t offset, int64_t length)
657{
658    char buf[20];
659    lseek(fd, offset, SEEK_SET);
660    read(fd, buf, sizeof(buf));
661    lseek(fd, offset, SEEK_SET);
662
663    long ident = *((long*)buf);
664
665    // Ogg vorbis?
666    if (ident == 0x5367674f) // 'OggS'
667        return VORBIS_PLAYER;
668
669    // Some kind of MIDI?
670    EAS_DATA_HANDLE easdata;
671    if (EAS_Init(&easdata) == EAS_SUCCESS) {
672        EAS_FILE locator;
673        locator.path = NULL;
674        locator.fd = fd;
675        locator.offset = offset;
676        locator.length = length;
677        EAS_HANDLE  eashandle;
678        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
679            EAS_CloseFile(easdata, eashandle);
680            EAS_Shutdown(easdata);
681            return SONIVOX_PLAYER;
682        }
683        EAS_Shutdown(easdata);
684    }
685
686    return getDefaultPlayerType();
687}
688
689player_type getPlayerType(const char* url)
690{
691    if (TestPlayerStub::canBeUsed(url)) {
692        return TEST_PLAYER;
693    }
694
695    // use MidiFile for MIDI extensions
696    int lenURL = strlen(url);
697    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
698        int len = strlen(FILE_EXTS[i].extension);
699        int start = lenURL - len;
700        if (start > 0) {
701            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
702                return FILE_EXTS[i].playertype;
703            }
704        }
705    }
706
707    return getDefaultPlayerType();
708}
709
710static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
711        notify_callback_f notifyFunc)
712{
713    sp<MediaPlayerBase> p;
714    switch (playerType) {
715#ifndef NO_OPENCORE
716        case PV_PLAYER:
717            LOGV(" create PVPlayer");
718            p = new PVPlayer();
719            break;
720#endif
721        case SONIVOX_PLAYER:
722            LOGV(" create MidiFile");
723            p = new MidiFile();
724            break;
725        case VORBIS_PLAYER:
726            LOGV(" create VorbisPlayer");
727            p = new VorbisPlayer();
728            break;
729#if BUILD_WITH_FULL_STAGEFRIGHT
730        case STAGEFRIGHT_PLAYER:
731            LOGV(" create StagefrightPlayer");
732            p = new StagefrightPlayer;
733            break;
734#endif
735        case TEST_PLAYER:
736            LOGV("Create Test Player stub");
737            p = new TestPlayerStub();
738            break;
739    }
740    if (p != NULL) {
741        if (p->initCheck() == NO_ERROR) {
742            p->setNotifyCallback(cookie, notifyFunc);
743        } else {
744            p.clear();
745        }
746    }
747    if (p == NULL) {
748        LOGE("Failed to create player object");
749    }
750    return p;
751}
752
753sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
754{
755    // determine if we have the right player type
756    sp<MediaPlayerBase> p = mPlayer;
757    if ((p != NULL) && (p->playerType() != playerType)) {
758        LOGV("delete player");
759        p.clear();
760    }
761    if (p == NULL) {
762        p = android::createPlayer(playerType, this, notify);
763    }
764    return p;
765}
766
767status_t MediaPlayerService::Client::setDataSource(const char *url)
768{
769    LOGV("setDataSource(%s)", url);
770    if (url == NULL)
771        return UNKNOWN_ERROR;
772
773    if (strncmp(url, "content://", 10) == 0) {
774        // get a filedescriptor for the content Uri and
775        // pass it to the setDataSource(fd) method
776
777        String16 url16(url);
778        int fd = android::openContentProviderFile(url16);
779        if (fd < 0)
780        {
781            LOGE("Couldn't open fd for %s", url);
782            return UNKNOWN_ERROR;
783        }
784        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
785        close(fd);
786        return mStatus;
787    } else {
788        player_type playerType = getPlayerType(url);
789        LOGV("player type = %d", playerType);
790
791        // create the right type of player
792        sp<MediaPlayerBase> p = createPlayer(playerType);
793        if (p == NULL) return NO_INIT;
794
795        if (!p->hardwareOutput()) {
796            mAudioOutput = new AudioOutput();
797            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
798        }
799
800        // now set data source
801        LOGV(" setDataSource");
802        mStatus = p->setDataSource(url);
803        if (mStatus == NO_ERROR) {
804            mPlayer = p;
805        } else {
806            LOGE("  error: %d", mStatus);
807        }
808        return mStatus;
809    }
810}
811
812status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
813{
814    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
815    struct stat sb;
816    int ret = fstat(fd, &sb);
817    if (ret != 0) {
818        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
819        return UNKNOWN_ERROR;
820    }
821
822    LOGV("st_dev  = %llu", sb.st_dev);
823    LOGV("st_mode = %u", sb.st_mode);
824    LOGV("st_uid  = %lu", sb.st_uid);
825    LOGV("st_gid  = %lu", sb.st_gid);
826    LOGV("st_size = %llu", sb.st_size);
827
828    if (offset >= sb.st_size) {
829        LOGE("offset error");
830        ::close(fd);
831        return UNKNOWN_ERROR;
832    }
833    if (offset + length > sb.st_size) {
834        length = sb.st_size - offset;
835        LOGV("calculated length = %lld", length);
836    }
837
838    player_type playerType = getPlayerType(fd, offset, length);
839    LOGV("player type = %d", playerType);
840
841    // create the right type of player
842    sp<MediaPlayerBase> p = createPlayer(playerType);
843    if (p == NULL) return NO_INIT;
844
845    if (!p->hardwareOutput()) {
846        mAudioOutput = new AudioOutput();
847        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
848    }
849
850    // now set data source
851    mStatus = p->setDataSource(fd, offset, length);
852    if (mStatus == NO_ERROR) mPlayer = p;
853    return mStatus;
854}
855
856status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
857{
858    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
859    sp<MediaPlayerBase> p = getPlayer();
860    if (p == 0) return UNKNOWN_ERROR;
861    return p->setVideoSurface(surface);
862}
863
864status_t MediaPlayerService::Client::invoke(const Parcel& request,
865                                            Parcel *reply)
866{
867    sp<MediaPlayerBase> p = getPlayer();
868    if (p == NULL) return UNKNOWN_ERROR;
869    return p->invoke(request, reply);
870}
871
872// This call doesn't need to access the native player.
873status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
874{
875    status_t status;
876    media::Metadata::Filter allow, drop;
877
878    if (unmarshallFilter(filter, &allow, &status) &&
879        unmarshallFilter(filter, &drop, &status)) {
880        Mutex::Autolock lock(mLock);
881
882        mMetadataAllow = allow;
883        mMetadataDrop = drop;
884    }
885    return status;
886}
887
888status_t MediaPlayerService::Client::getMetadata(
889        bool update_only, bool apply_filter, Parcel *reply)
890{
891    sp<MediaPlayerBase> player = getPlayer();
892    if (player == 0) return UNKNOWN_ERROR;
893
894    status_t status;
895    // Placeholder for the return code, updated by the caller.
896    reply->writeInt32(-1);
897
898    media::Metadata::Filter ids;
899
900    // We don't block notifications while we fetch the data. We clear
901    // mMetadataUpdated first so we don't lose notifications happening
902    // during the rest of this call.
903    {
904        Mutex::Autolock lock(mLock);
905        if (update_only) {
906            ids = mMetadataUpdated;
907        }
908        mMetadataUpdated.clear();
909    }
910
911    media::Metadata metadata(reply);
912
913    metadata.appendHeader();
914    status = player->getMetadata(ids, reply);
915
916    if (status != OK) {
917        metadata.resetParcel();
918        LOGE("getMetadata failed %d", status);
919        return status;
920    }
921
922    // FIXME: Implement filtering on the result. Not critical since
923    // filtering takes place on the update notifications already. This
924    // would be when all the metadata are fetch and a filter is set.
925
926    // Everything is fine, update the metadata length.
927    metadata.updateLength();
928    return OK;
929}
930
931status_t MediaPlayerService::Client::prepareAsync()
932{
933    LOGV("[%d] prepareAsync", mConnId);
934    sp<MediaPlayerBase> p = getPlayer();
935    if (p == 0) return UNKNOWN_ERROR;
936    status_t ret = p->prepareAsync();
937#if CALLBACK_ANTAGONIZER
938    LOGD("start Antagonizer");
939    if (ret == NO_ERROR) mAntagonizer->start();
940#endif
941    return ret;
942}
943
944status_t MediaPlayerService::Client::start()
945{
946    LOGV("[%d] start", mConnId);
947    sp<MediaPlayerBase> p = getPlayer();
948    if (p == 0) return UNKNOWN_ERROR;
949    p->setLooping(mLoop);
950    return p->start();
951}
952
953status_t MediaPlayerService::Client::stop()
954{
955    LOGV("[%d] stop", mConnId);
956    sp<MediaPlayerBase> p = getPlayer();
957    if (p == 0) return UNKNOWN_ERROR;
958    return p->stop();
959}
960
961status_t MediaPlayerService::Client::pause()
962{
963    LOGV("[%d] pause", mConnId);
964    sp<MediaPlayerBase> p = getPlayer();
965    if (p == 0) return UNKNOWN_ERROR;
966    return p->pause();
967}
968
969status_t MediaPlayerService::Client::isPlaying(bool* state)
970{
971    *state = false;
972    sp<MediaPlayerBase> p = getPlayer();
973    if (p == 0) return UNKNOWN_ERROR;
974    *state = p->isPlaying();
975    LOGV("[%d] isPlaying: %d", mConnId, *state);
976    return NO_ERROR;
977}
978
979status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
980{
981    LOGV("getCurrentPosition");
982    sp<MediaPlayerBase> p = getPlayer();
983    if (p == 0) return UNKNOWN_ERROR;
984    status_t ret = p->getCurrentPosition(msec);
985    if (ret == NO_ERROR) {
986        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
987    } else {
988        LOGE("getCurrentPosition returned %d", ret);
989    }
990    return ret;
991}
992
993status_t MediaPlayerService::Client::getDuration(int *msec)
994{
995    LOGV("getDuration");
996    sp<MediaPlayerBase> p = getPlayer();
997    if (p == 0) return UNKNOWN_ERROR;
998    status_t ret = p->getDuration(msec);
999    if (ret == NO_ERROR) {
1000        LOGV("[%d] getDuration = %d", mConnId, *msec);
1001    } else {
1002        LOGE("getDuration returned %d", ret);
1003    }
1004    return ret;
1005}
1006
1007status_t MediaPlayerService::Client::seekTo(int msec)
1008{
1009    LOGV("[%d] seekTo(%d)", mConnId, msec);
1010    sp<MediaPlayerBase> p = getPlayer();
1011    if (p == 0) return UNKNOWN_ERROR;
1012    return p->seekTo(msec);
1013}
1014
1015status_t MediaPlayerService::Client::reset()
1016{
1017    LOGV("[%d] reset", mConnId);
1018    sp<MediaPlayerBase> p = getPlayer();
1019    if (p == 0) return UNKNOWN_ERROR;
1020    return p->reset();
1021}
1022
1023status_t MediaPlayerService::Client::setAudioStreamType(int type)
1024{
1025    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1026    // TODO: for hardware output, call player instead
1027    Mutex::Autolock l(mLock);
1028    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1029    return NO_ERROR;
1030}
1031
1032status_t MediaPlayerService::Client::setLooping(int loop)
1033{
1034    LOGV("[%d] setLooping(%d)", mConnId, loop);
1035    mLoop = loop;
1036    sp<MediaPlayerBase> p = getPlayer();
1037    if (p != 0) return p->setLooping(loop);
1038    return NO_ERROR;
1039}
1040
1041status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1042{
1043    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1044    // TODO: for hardware output, call player instead
1045    Mutex::Autolock l(mLock);
1046    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1047    return NO_ERROR;
1048}
1049
1050
1051void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1052{
1053    Client* client = static_cast<Client*>(cookie);
1054
1055    if (MEDIA_INFO == msg &&
1056        MEDIA_INFO_METADATA_UPDATE == ext1) {
1057        const media::Metadata::Type metadata_type = ext2;
1058
1059        if(client->shouldDropMetadata(metadata_type)) {
1060            return;
1061        }
1062
1063        // Update the list of metadata that have changed. getMetadata
1064        // also access mMetadataUpdated and clears it.
1065        client->addNewMetadataUpdate(metadata_type);
1066    }
1067    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1068    client->mClient->notify(msg, ext1, ext2);
1069}
1070
1071
1072bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1073{
1074    Mutex::Autolock lock(mLock);
1075
1076    if (findMetadata(mMetadataDrop, code)) {
1077        return true;
1078    }
1079
1080    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1081        return false;
1082    } else {
1083        return true;
1084    }
1085}
1086
1087
1088void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1089    Mutex::Autolock lock(mLock);
1090    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1091        mMetadataUpdated.add(metadata_type);
1092    }
1093}
1094
1095#if CALLBACK_ANTAGONIZER
1096const int Antagonizer::interval = 10000; // 10 msecs
1097
1098Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1099    mExit(false), mActive(false), mClient(client), mCb(cb)
1100{
1101    createThread(callbackThread, this);
1102}
1103
1104void Antagonizer::kill()
1105{
1106    Mutex::Autolock _l(mLock);
1107    mActive = false;
1108    mExit = true;
1109    mCondition.wait(mLock);
1110}
1111
1112int Antagonizer::callbackThread(void* user)
1113{
1114    LOGD("Antagonizer started");
1115    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1116    while (!p->mExit) {
1117        if (p->mActive) {
1118            LOGV("send event");
1119            p->mCb(p->mClient, 0, 0, 0);
1120        }
1121        usleep(interval);
1122    }
1123    Mutex::Autolock _l(p->mLock);
1124    p->mCondition.signal();
1125    LOGD("Antagonizer stopped");
1126    return 0;
1127}
1128#endif
1129
1130static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1131
1132sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1133{
1134    LOGV("decode(%s)", url);
1135    sp<MemoryBase> mem;
1136    sp<MediaPlayerBase> player;
1137
1138    // Protect our precious, precious DRMd ringtones by only allowing
1139    // decoding of http, but not filesystem paths or content Uris.
1140    // If the application wants to decode those, it should open a
1141    // filedescriptor for them and use that.
1142    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1143        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1144        return mem;
1145    }
1146
1147    player_type playerType = getPlayerType(url);
1148    LOGV("player type = %d", playerType);
1149
1150    // create the right type of player
1151    sp<AudioCache> cache = new AudioCache(url);
1152    player = android::createPlayer(playerType, cache.get(), cache->notify);
1153    if (player == NULL) goto Exit;
1154    if (player->hardwareOutput()) goto Exit;
1155
1156    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1157
1158    // set data source
1159    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1160
1161    LOGV("prepare");
1162    player->prepareAsync();
1163
1164    LOGV("wait for prepare");
1165    if (cache->wait() != NO_ERROR) goto Exit;
1166
1167    LOGV("start");
1168    player->start();
1169
1170    LOGV("wait for playback complete");
1171    if (cache->wait() != NO_ERROR) goto Exit;
1172
1173    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1174    *pSampleRate = cache->sampleRate();
1175    *pNumChannels = cache->channelCount();
1176    *pFormat = cache->format();
1177    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1178
1179Exit:
1180    if (player != 0) player->reset();
1181    return mem;
1182}
1183
1184sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1185{
1186    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1187    sp<MemoryBase> mem;
1188    sp<MediaPlayerBase> player;
1189
1190    player_type playerType = getPlayerType(fd, offset, length);
1191    LOGV("player type = %d", playerType);
1192
1193    // create the right type of player
1194    sp<AudioCache> cache = new AudioCache("decode_fd");
1195    player = android::createPlayer(playerType, cache.get(), cache->notify);
1196    if (player == NULL) goto Exit;
1197    if (player->hardwareOutput()) goto Exit;
1198
1199    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1200
1201    // set data source
1202    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1203
1204    LOGV("prepare");
1205    player->prepareAsync();
1206
1207    LOGV("wait for prepare");
1208    if (cache->wait() != NO_ERROR) goto Exit;
1209
1210    LOGV("start");
1211    player->start();
1212
1213    LOGV("wait for playback complete");
1214    if (cache->wait() != NO_ERROR) goto Exit;
1215
1216    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1217    *pSampleRate = cache->sampleRate();
1218    *pNumChannels = cache->channelCount();
1219    *pFormat = cache->format();
1220    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1221
1222Exit:
1223    if (player != 0) player->reset();
1224    ::close(fd);
1225    return mem;
1226}
1227
1228/*
1229 * Avert your eyes, ugly hack ahead.
1230 * The following is to support music visualizations.
1231 */
1232
1233static const int NUMVIZBUF = 32;
1234static const int VIZBUFFRAMES = 1024;
1235static const int TOTALBUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1236
1237static bool gotMem = false;
1238static sp<MemoryBase> mem[NUMVIZBUF];
1239static uint64_t timeStamp[NUMVIZBUF];
1240static uint64_t lastReadTime;
1241static uint64_t lastWriteTime;
1242static int writeIdx = 0;
1243
1244static void allocVizBufs() {
1245    if (!gotMem) {
1246        for (int i=0;i<NUMVIZBUF;i++) {
1247            sp<MemoryHeapBase> heap = new MemoryHeapBase(VIZBUFFRAMES*2, 0, "snooper");
1248            mem[i] = new MemoryBase(heap, 0, heap->getSize());
1249            timeStamp[i] = 0;
1250        }
1251        gotMem = true;
1252    }
1253}
1254
1255
1256/*
1257 * Get a buffer of audio data that is about to be played.
1258 * We don't synchronize this because in practice the writer
1259 * is ahead of the reader, and even if we did happen to catch
1260 * a buffer while it's being written, it's just a visualization,
1261 * so no harm done.
1262 */
1263static sp<MemoryBase> getVizBuffer() {
1264
1265    allocVizBufs();
1266
1267    lastReadTime = uptimeMillis() + 100; // account for renderer delay (we shouldn't be doing this here)
1268
1269    // if there is no recent buffer (yet), just return empty handed
1270    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1271        //LOGI("@@@@    no audio data to look at yet");
1272        return NULL;
1273    }
1274
1275    char buf[200];
1276
1277    int closestIdx = -1;
1278    uint32_t closestTime = 0x7ffffff;
1279
1280    for (int i = 0; i < NUMVIZBUF; i++) {
1281        uint64_t tsi = timeStamp[i];
1282        uint64_t diff = tsi > lastReadTime ? tsi - lastReadTime : lastReadTime - tsi;
1283        if (diff < closestTime) {
1284            closestIdx = i;
1285            closestTime = diff;
1286        }
1287    }
1288
1289
1290    if (closestIdx >= 0) {
1291        //LOGI("@@@ return buffer %d, %d/%d", closestIdx, uint32_t(lastReadTime), uint32_t(timeStamp[closestIdx]));
1292        return mem[closestIdx];
1293    }
1294
1295    // we won't get here, since we either bailed out early, or got a buffer
1296    LOGD("Didn't expect to be here");
1297    return NULL;
1298}
1299
1300static void storeVizBuf(const void *data, int len, uint64_t time) {
1301    // Copy the data in to the visualizer buffer
1302    // Assume a 16 bit stereo source for now.
1303    short *viz = (short*)mem[writeIdx]->pointer();
1304    short *src = (short*)data;
1305    for (int i = 0; i < VIZBUFFRAMES; i++) {
1306        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1307        // This should still be good enough for a visualization
1308        *viz++ = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1309        src += 2;
1310    }
1311    timeStamp[writeIdx++] = time;
1312    if (writeIdx >= NUMVIZBUF) {
1313        writeIdx = 0;
1314    }
1315}
1316
1317static void makeVizBuffers(const char *data, int len, uint64_t time) {
1318
1319    allocVizBufs();
1320
1321    uint64_t startTime = time;
1322    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1323    while (len >= VIZBUFFRAMES * frameSize) {
1324        storeVizBuf(data, len, time);
1325        data += VIZBUFFRAMES * frameSize;
1326        len -= VIZBUFFRAMES * frameSize;
1327        time += 1000 * VIZBUFFRAMES / 44100;
1328    }
1329    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1330}
1331
1332sp<IMemory> MediaPlayerService::snoop()
1333{
1334    sp<MemoryBase> mem = getVizBuffer();
1335    return mem;
1336}
1337
1338
1339#undef LOG_TAG
1340#define LOG_TAG "AudioSink"
1341MediaPlayerService::AudioOutput::AudioOutput()
1342    : mCallback(NULL),
1343      mCallbackCookie(NULL) {
1344    mTrack = 0;
1345    mStreamType = AudioSystem::MUSIC;
1346    mLeftVolume = 1.0;
1347    mRightVolume = 1.0;
1348    mLatency = 0;
1349    mMsecsPerFrame = 0;
1350    mNumFramesWritten = 0;
1351    setMinBufferCount();
1352}
1353
1354MediaPlayerService::AudioOutput::~AudioOutput()
1355{
1356    close();
1357}
1358
1359void MediaPlayerService::AudioOutput::setMinBufferCount()
1360{
1361    char value[PROPERTY_VALUE_MAX];
1362    if (property_get("ro.kernel.qemu", value, 0)) {
1363        mIsOnEmulator = true;
1364        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1365    }
1366}
1367
1368bool MediaPlayerService::AudioOutput::isOnEmulator()
1369{
1370    setMinBufferCount();
1371    return mIsOnEmulator;
1372}
1373
1374int MediaPlayerService::AudioOutput::getMinBufferCount()
1375{
1376    setMinBufferCount();
1377    return mMinBufferCount;
1378}
1379
1380ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1381{
1382    if (mTrack == 0) return NO_INIT;
1383    return mTrack->frameCount() * frameSize();
1384}
1385
1386ssize_t MediaPlayerService::AudioOutput::frameCount() const
1387{
1388    if (mTrack == 0) return NO_INIT;
1389    return mTrack->frameCount();
1390}
1391
1392ssize_t MediaPlayerService::AudioOutput::channelCount() const
1393{
1394    if (mTrack == 0) return NO_INIT;
1395    return mTrack->channelCount();
1396}
1397
1398ssize_t MediaPlayerService::AudioOutput::frameSize() const
1399{
1400    if (mTrack == 0) return NO_INIT;
1401    return mTrack->frameSize();
1402}
1403
1404uint32_t MediaPlayerService::AudioOutput::latency () const
1405{
1406    return mLatency;
1407}
1408
1409float MediaPlayerService::AudioOutput::msecsPerFrame() const
1410{
1411    return mMsecsPerFrame;
1412}
1413
1414status_t MediaPlayerService::AudioOutput::open(
1415        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1416        AudioCallback cb, void *cookie)
1417{
1418    mCallback = cb;
1419    mCallbackCookie = cookie;
1420
1421    // Check argument "bufferCount" against the mininum buffer count
1422    if (bufferCount < mMinBufferCount) {
1423        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1424        bufferCount = mMinBufferCount;
1425
1426    }
1427    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1428    if (mTrack) close();
1429    int afSampleRate;
1430    int afFrameCount;
1431    int frameCount;
1432
1433    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1434        return NO_INIT;
1435    }
1436    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1437        return NO_INIT;
1438    }
1439
1440    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1441
1442    AudioTrack *t;
1443    if (mCallback != NULL) {
1444        t = new AudioTrack(
1445                mStreamType,
1446                sampleRate,
1447                format,
1448                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1449                frameCount,
1450                0 /* flags */,
1451                CallbackWrapper,
1452                this);
1453    } else {
1454        t = new AudioTrack(
1455                mStreamType,
1456                sampleRate,
1457                format,
1458                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1459                frameCount);
1460    }
1461
1462    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1463        LOGE("Unable to create audio track");
1464        delete t;
1465        return NO_INIT;
1466    }
1467
1468    LOGV("setVolume");
1469    t->setVolume(mLeftVolume, mRightVolume);
1470    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1471    mLatency = t->latency() + kAudioVideoDelayMs;
1472    mTrack = t;
1473    return NO_ERROR;
1474}
1475
1476void MediaPlayerService::AudioOutput::start()
1477{
1478    LOGV("start");
1479    if (mTrack) {
1480        mTrack->setVolume(mLeftVolume, mRightVolume);
1481        mTrack->start();
1482        mTrack->getPosition(&mNumFramesWritten);
1483    }
1484}
1485
1486ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1487{
1488    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1489
1490    //LOGV("write(%p, %u)", buffer, size);
1491    if (mTrack) {
1492        // Only make visualization buffers if anyone recently requested visualization data
1493        uint64_t now = uptimeMillis();
1494        if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1495            // Based on the current play counter, the number of frames written and
1496            // the current real time we can calculate the approximate real start
1497            // time of the buffer we're about to write.
1498            uint32_t pos;
1499            mTrack->getPosition(&pos);
1500
1501            // we're writing ahead by this many frames:
1502            int ahead = mNumFramesWritten - pos;
1503            //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1504            // which is this many milliseconds, assuming 44100 Hz:
1505            ahead /= 44;
1506
1507            makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1508            lastWriteTime = now;
1509        }
1510        ssize_t ret = mTrack->write(buffer, size);
1511        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1512        return ret;
1513    }
1514    return NO_INIT;
1515}
1516
1517void MediaPlayerService::AudioOutput::stop()
1518{
1519    LOGV("stop");
1520    if (mTrack) mTrack->stop();
1521    lastWriteTime = 0;
1522}
1523
1524void MediaPlayerService::AudioOutput::flush()
1525{
1526    LOGV("flush");
1527    if (mTrack) mTrack->flush();
1528}
1529
1530void MediaPlayerService::AudioOutput::pause()
1531{
1532    LOGV("pause");
1533    if (mTrack) mTrack->pause();
1534}
1535
1536void MediaPlayerService::AudioOutput::close()
1537{
1538    LOGV("close");
1539    delete mTrack;
1540    mTrack = 0;
1541}
1542
1543void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1544{
1545    LOGV("setVolume(%f, %f)", left, right);
1546    mLeftVolume = left;
1547    mRightVolume = right;
1548    if (mTrack) {
1549        mTrack->setVolume(left, right);
1550    }
1551}
1552
1553// static
1554void MediaPlayerService::AudioOutput::CallbackWrapper(
1555        int event, void *cookie, void *info) {
1556    if (event != AudioTrack::EVENT_MORE_DATA) {
1557        return;
1558    }
1559
1560    AudioOutput *me = (AudioOutput *)cookie;
1561    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1562
1563    (*me->mCallback)(
1564            me, buffer->raw, buffer->size, me->mCallbackCookie);
1565}
1566
1567#undef LOG_TAG
1568#define LOG_TAG "AudioCache"
1569MediaPlayerService::AudioCache::AudioCache(const char* name) :
1570    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1571    mError(NO_ERROR), mCommandComplete(false)
1572{
1573    // create ashmem heap
1574    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1575}
1576
1577uint32_t MediaPlayerService::AudioCache::latency () const
1578{
1579    return 0;
1580}
1581
1582float MediaPlayerService::AudioCache::msecsPerFrame() const
1583{
1584    return mMsecsPerFrame;
1585}
1586
1587status_t MediaPlayerService::AudioCache::open(
1588        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1589        AudioCallback cb, void *cookie)
1590{
1591    if (cb != NULL) {
1592        return UNKNOWN_ERROR;  // TODO: implement this.
1593    }
1594
1595    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1596    if (mHeap->getHeapID() < 0) return NO_INIT;
1597    mSampleRate = sampleRate;
1598    mChannelCount = (uint16_t)channelCount;
1599    mFormat = (uint16_t)format;
1600    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1601    return NO_ERROR;
1602}
1603
1604ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1605{
1606    LOGV("write(%p, %u)", buffer, size);
1607    if ((buffer == 0) || (size == 0)) return size;
1608
1609    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1610    if (p == NULL) return NO_INIT;
1611    p += mSize;
1612    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1613    if (mSize + size > mHeap->getSize()) {
1614        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1615        size = mHeap->getSize() - mSize;
1616    }
1617    memcpy(p, buffer, size);
1618    mSize += size;
1619    return size;
1620}
1621
1622// call with lock held
1623status_t MediaPlayerService::AudioCache::wait()
1624{
1625    Mutex::Autolock lock(mLock);
1626    if (!mCommandComplete) {
1627        mSignal.wait(mLock);
1628    }
1629    mCommandComplete = false;
1630
1631    if (mError == NO_ERROR) {
1632        LOGV("wait - success");
1633    } else {
1634        LOGV("wait - error");
1635    }
1636    return mError;
1637}
1638
1639void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1640{
1641    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1642    AudioCache* p = static_cast<AudioCache*>(cookie);
1643
1644    // ignore buffering messages
1645    if (msg == MEDIA_BUFFERING_UPDATE) return;
1646
1647    // set error condition
1648    if (msg == MEDIA_ERROR) {
1649        LOGE("Error %d, %d occurred", ext1, ext2);
1650        p->mError = ext1;
1651    }
1652
1653    // wake up thread
1654    LOGV("wakeup thread");
1655    p->mCommandComplete = true;
1656    p->mSignal.signal();
1657}
1658
1659} // namespace android
1660