MediaPlayerService.cpp revision 5b65c7043dada0c89d3a941742666ac40ea35746 
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::getOMX() {
288    Mutex::Autolock autoLock(mLock);
289
290    if (mOMX.get() == NULL) {
291        mOMX = new OMX;
292    }
293
294    return mOMX;
295}
296
297status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
298{
299    const size_t SIZE = 256;
300    char buffer[SIZE];
301    String8 result;
302
303    result.append(" AudioCache\n");
304    if (mHeap != 0) {
305        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
306                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
307        result.append(buffer);
308    }
309    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
310            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
311    result.append(buffer);
312    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
313            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
314    result.append(buffer);
315    ::write(fd, result.string(), result.size());
316    return NO_ERROR;
317}
318
319status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
320{
321    const size_t SIZE = 256;
322    char buffer[SIZE];
323    String8 result;
324
325    result.append(" AudioOutput\n");
326    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
327            mStreamType, mLeftVolume, mRightVolume);
328    result.append(buffer);
329    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
330            mMsecsPerFrame, mLatency);
331    result.append(buffer);
332    ::write(fd, result.string(), result.size());
333    if (mTrack != 0) {
334        mTrack->dump(fd, args);
335    }
336    return NO_ERROR;
337}
338
339status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
340{
341    const size_t SIZE = 256;
342    char buffer[SIZE];
343    String8 result;
344    result.append(" Client\n");
345    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
346            mPid, mConnId, mStatus, mLoop?"true": "false");
347    result.append(buffer);
348    write(fd, result.string(), result.size());
349    if (mAudioOutput != 0) {
350        mAudioOutput->dump(fd, args);
351    }
352    write(fd, "\n", 1);
353    return NO_ERROR;
354}
355
356static int myTid() {
357#ifdef HAVE_GETTID
358    return gettid();
359#else
360    return getpid();
361#endif
362}
363
364#if defined(__arm__)
365extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
366        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
367extern "C" void free_malloc_leak_info(uint8_t* info);
368
369void memStatus(int fd, const Vector<String16>& args)
370{
371    const size_t SIZE = 256;
372    char buffer[SIZE];
373    String8 result;
374
375    typedef struct {
376        size_t size;
377        size_t dups;
378        intptr_t * backtrace;
379    } AllocEntry;
380
381    uint8_t *info = NULL;
382    size_t overallSize = 0;
383    size_t infoSize = 0;
384    size_t totalMemory = 0;
385    size_t backtraceSize = 0;
386
387    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
388    if (info) {
389        uint8_t *ptr = info;
390        size_t count = overallSize / infoSize;
391
392        snprintf(buffer, SIZE, " Allocation count %i\n", count);
393        result.append(buffer);
394
395        AllocEntry * entries = new AllocEntry[count];
396
397        for (size_t i = 0; i < count; i++) {
398            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
399            AllocEntry *e = &entries[i];
400
401            e->size = *reinterpret_cast<size_t *>(ptr);
402            ptr += sizeof(size_t);
403
404            e->dups = *reinterpret_cast<size_t *>(ptr);
405            ptr += sizeof(size_t);
406
407            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
408            ptr += sizeof(intptr_t) * backtraceSize;
409        }
410
411        // Now we need to sort the entries.  They come sorted by size but
412        // not by stack trace which causes problems using diff.
413        bool moved;
414        do {
415            moved = false;
416            for (size_t i = 0; i < (count - 1); i++) {
417                AllocEntry *e1 = &entries[i];
418                AllocEntry *e2 = &entries[i+1];
419
420                bool swap = e1->size < e2->size;
421                if (e1->size == e2->size) {
422                    for(size_t j = 0; j < backtraceSize; j++) {
423                        if (e1->backtrace[j] == e2->backtrace[j]) {
424                            continue;
425                        }
426                        swap = e1->backtrace[j] < e2->backtrace[j];
427                        break;
428                    }
429                }
430                if (swap) {
431                    AllocEntry t = entries[i];
432                    entries[i] = entries[i+1];
433                    entries[i+1] = t;
434                    moved = true;
435                }
436            }
437        } while (moved);
438
439        for (size_t i = 0; i < count; i++) {
440            AllocEntry *e = &entries[i];
441
442            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
443            result.append(buffer);
444            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
445                if (ct) {
446                    result.append(", ");
447                }
448                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
449                result.append(buffer);
450            }
451            result.append("\n");
452        }
453
454        delete[] entries;
455        free_malloc_leak_info(info);
456    }
457
458    write(fd, result.string(), result.size());
459}
460#endif
461
462status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
463{
464    const size_t SIZE = 256;
465    char buffer[SIZE];
466    String8 result;
467    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
468        snprintf(buffer, SIZE, "Permission Denial: "
469                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
470                IPCThreadState::self()->getCallingPid(),
471                IPCThreadState::self()->getCallingUid());
472        result.append(buffer);
473    } else {
474        Mutex::Autolock lock(mLock);
475        for (int i = 0, n = mClients.size(); i < n; ++i) {
476            sp<Client> c = mClients[i].promote();
477            if (c != 0) c->dump(fd, args);
478        }
479        for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
480            result.append(" MediaRecorderClient\n");
481            sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
482            snprintf(buffer, 255, "  pid(%d)\n\n", c->mPid);
483            result.append(buffer);
484        }
485
486        result.append(" Files opened and/or mapped:\n");
487        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
488        FILE *f = fopen(buffer, "r");
489        if (f) {
490            while (!feof(f)) {
491                fgets(buffer, SIZE, f);
492                if (strstr(buffer, " /sdcard/") ||
493                    strstr(buffer, " /system/sounds/") ||
494                    strstr(buffer, " /system/media/")) {
495                    result.append("  ");
496                    result.append(buffer);
497                }
498            }
499            fclose(f);
500        } else {
501            result.append("couldn't open ");
502            result.append(buffer);
503            result.append("\n");
504        }
505
506        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
507        DIR *d = opendir(buffer);
508        if (d) {
509            struct dirent *ent;
510            while((ent = readdir(d)) != NULL) {
511                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
512                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
513                    struct stat s;
514                    if (lstat(buffer, &s) == 0) {
515                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
516                            char linkto[256];
517                            int len = readlink(buffer, linkto, sizeof(linkto));
518                            if(len > 0) {
519                                if(len > 255) {
520                                    linkto[252] = '.';
521                                    linkto[253] = '.';
522                                    linkto[254] = '.';
523                                    linkto[255] = 0;
524                                } else {
525                                    linkto[len] = 0;
526                                }
527                                if (strstr(linkto, "/sdcard/") == linkto ||
528                                    strstr(linkto, "/system/sounds/") == linkto ||
529                                    strstr(linkto, "/system/media/") == linkto) {
530                                    result.append("  ");
531                                    result.append(buffer);
532                                    result.append(" -> ");
533                                    result.append(linkto);
534                                    result.append("\n");
535                                }
536                            }
537                        } else {
538                            result.append("  unexpected type for ");
539                            result.append(buffer);
540                            result.append("\n");
541                        }
542                    }
543                }
544            }
545            closedir(d);
546        } else {
547            result.append("couldn't open ");
548            result.append(buffer);
549            result.append("\n");
550        }
551
552#if defined(__arm__)
553        bool dumpMem = false;
554        for (size_t i = 0; i < args.size(); i++) {
555            if (args[i] == String16("-m")) {
556                dumpMem = true;
557            }
558        }
559        if (dumpMem) {
560            memStatus(fd, args);
561        }
562#endif
563    }
564    write(fd, result.string(), result.size());
565    return NO_ERROR;
566}
567
568void MediaPlayerService::removeClient(wp<Client> client)
569{
570    Mutex::Autolock lock(mLock);
571    mClients.remove(client);
572}
573
574MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
575        int32_t connId, const sp<IMediaPlayerClient>& client)
576{
577    LOGV("Client(%d) constructor", connId);
578    mPid = pid;
579    mConnId = connId;
580    mService = service;
581    mClient = client;
582    mLoop = false;
583    mStatus = NO_INIT;
584#if CALLBACK_ANTAGONIZER
585    LOGD("create Antagonizer");
586    mAntagonizer = new Antagonizer(notify, this);
587#endif
588}
589
590MediaPlayerService::Client::~Client()
591{
592    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
593    mAudioOutput.clear();
594    wp<Client> client(this);
595    disconnect();
596    mService->removeClient(client);
597}
598
599void MediaPlayerService::Client::disconnect()
600{
601    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
602    // grab local reference and clear main reference to prevent future
603    // access to object
604    sp<MediaPlayerBase> p;
605    {
606        Mutex::Autolock l(mLock);
607        p = mPlayer;
608    }
609    mClient.clear();
610
611    mPlayer.clear();
612
613    // clear the notification to prevent callbacks to dead client
614    // and reset the player. We assume the player will serialize
615    // access to itself if necessary.
616    if (p != 0) {
617        p->setNotifyCallback(0, 0);
618#if CALLBACK_ANTAGONIZER
619        LOGD("kill Antagonizer");
620        mAntagonizer->kill();
621#endif
622        p->reset();
623    }
624
625    IPCThreadState::self()->flushCommands();
626}
627
628static player_type getDefaultPlayerType() {
629#if BUILD_WITH_FULL_STAGEFRIGHT
630    char value[PROPERTY_VALUE_MAX];
631    if (property_get("media.stagefright.enable-player", value, NULL)
632        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
633        return STAGEFRIGHT_PLAYER;
634    }
635#endif
636
637    return PV_PLAYER;
638}
639
640player_type getPlayerType(int fd, int64_t offset, int64_t length)
641{
642    char buf[20];
643    lseek(fd, offset, SEEK_SET);
644    read(fd, buf, sizeof(buf));
645    lseek(fd, offset, SEEK_SET);
646
647    long ident = *((long*)buf);
648
649    // Ogg vorbis?
650    if (ident == 0x5367674f) // 'OggS'
651        return VORBIS_PLAYER;
652
653    // Some kind of MIDI?
654    EAS_DATA_HANDLE easdata;
655    if (EAS_Init(&easdata) == EAS_SUCCESS) {
656        EAS_FILE locator;
657        locator.path = NULL;
658        locator.fd = fd;
659        locator.offset = offset;
660        locator.length = length;
661        EAS_HANDLE  eashandle;
662        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
663            EAS_CloseFile(easdata, eashandle);
664            EAS_Shutdown(easdata);
665            return SONIVOX_PLAYER;
666        }
667        EAS_Shutdown(easdata);
668    }
669
670    return getDefaultPlayerType();
671}
672
673player_type getPlayerType(const char* url)
674{
675    if (TestPlayerStub::canBeUsed(url)) {
676        return TEST_PLAYER;
677    }
678
679    // use MidiFile for MIDI extensions
680    int lenURL = strlen(url);
681    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
682        int len = strlen(FILE_EXTS[i].extension);
683        int start = lenURL - len;
684        if (start > 0) {
685            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
686                return FILE_EXTS[i].playertype;
687            }
688        }
689    }
690
691    return getDefaultPlayerType();
692}
693
694static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
695        notify_callback_f notifyFunc)
696{
697    sp<MediaPlayerBase> p;
698    switch (playerType) {
699#ifndef NO_OPENCORE
700        case PV_PLAYER:
701            LOGV(" create PVPlayer");
702            p = new PVPlayer();
703            break;
704#endif
705        case SONIVOX_PLAYER:
706            LOGV(" create MidiFile");
707            p = new MidiFile();
708            break;
709        case VORBIS_PLAYER:
710            LOGV(" create VorbisPlayer");
711            p = new VorbisPlayer();
712            break;
713#if BUILD_WITH_FULL_STAGEFRIGHT
714        case STAGEFRIGHT_PLAYER:
715            LOGV(" create StagefrightPlayer");
716            p = new StagefrightPlayer;
717            break;
718#endif
719        case TEST_PLAYER:
720            LOGV("Create Test Player stub");
721            p = new TestPlayerStub();
722            break;
723    }
724    if (p != NULL) {
725        if (p->initCheck() == NO_ERROR) {
726            p->setNotifyCallback(cookie, notifyFunc);
727        } else {
728            p.clear();
729        }
730    }
731    if (p == NULL) {
732        LOGE("Failed to create player object");
733    }
734    return p;
735}
736
737sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
738{
739    // determine if we have the right player type
740    sp<MediaPlayerBase> p = mPlayer;
741    if ((p != NULL) && (p->playerType() != playerType)) {
742        LOGV("delete player");
743        p.clear();
744    }
745    if (p == NULL) {
746        p = android::createPlayer(playerType, this, notify);
747    }
748    return p;
749}
750
751status_t MediaPlayerService::Client::setDataSource(const char *url)
752{
753    LOGV("setDataSource(%s)", url);
754    if (url == NULL)
755        return UNKNOWN_ERROR;
756
757    if (strncmp(url, "content://", 10) == 0) {
758        // get a filedescriptor for the content Uri and
759        // pass it to the setDataSource(fd) method
760
761        String16 url16(url);
762        int fd = android::openContentProviderFile(url16);
763        if (fd < 0)
764        {
765            LOGE("Couldn't open fd for %s", url);
766            return UNKNOWN_ERROR;
767        }
768        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
769        close(fd);
770        return mStatus;
771    } else {
772        player_type playerType = getPlayerType(url);
773        LOGV("player type = %d", playerType);
774
775        // create the right type of player
776        sp<MediaPlayerBase> p = createPlayer(playerType);
777        if (p == NULL) return NO_INIT;
778
779        if (!p->hardwareOutput()) {
780            mAudioOutput = new AudioOutput();
781            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
782        }
783
784        // now set data source
785        LOGV(" setDataSource");
786        mStatus = p->setDataSource(url);
787        if (mStatus == NO_ERROR) {
788            mPlayer = p;
789        } else {
790            LOGE("  error: %d", mStatus);
791        }
792        return mStatus;
793    }
794}
795
796status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
797{
798    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
799    struct stat sb;
800    int ret = fstat(fd, &sb);
801    if (ret != 0) {
802        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
803        return UNKNOWN_ERROR;
804    }
805
806    LOGV("st_dev  = %llu", sb.st_dev);
807    LOGV("st_mode = %u", sb.st_mode);
808    LOGV("st_uid  = %lu", sb.st_uid);
809    LOGV("st_gid  = %lu", sb.st_gid);
810    LOGV("st_size = %llu", sb.st_size);
811
812    if (offset >= sb.st_size) {
813        LOGE("offset error");
814        ::close(fd);
815        return UNKNOWN_ERROR;
816    }
817    if (offset + length > sb.st_size) {
818        length = sb.st_size - offset;
819        LOGV("calculated length = %lld", length);
820    }
821
822    player_type playerType = getPlayerType(fd, offset, length);
823    LOGV("player type = %d", playerType);
824
825    // create the right type of player
826    sp<MediaPlayerBase> p = createPlayer(playerType);
827    if (p == NULL) return NO_INIT;
828
829    if (!p->hardwareOutput()) {
830        mAudioOutput = new AudioOutput();
831        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
832    }
833
834    // now set data source
835    mStatus = p->setDataSource(fd, offset, length);
836    if (mStatus == NO_ERROR) mPlayer = p;
837    return mStatus;
838}
839
840status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
841{
842    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
843    sp<MediaPlayerBase> p = getPlayer();
844    if (p == 0) return UNKNOWN_ERROR;
845    return p->setVideoSurface(surface);
846}
847
848status_t MediaPlayerService::Client::invoke(const Parcel& request,
849                                            Parcel *reply)
850{
851    sp<MediaPlayerBase> p = getPlayer();
852    if (p == NULL) return UNKNOWN_ERROR;
853    return p->invoke(request, reply);
854}
855
856// This call doesn't need to access the native player.
857status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
858{
859    status_t status;
860    media::Metadata::Filter allow, drop;
861
862    if (unmarshallFilter(filter, &allow, &status) &&
863        unmarshallFilter(filter, &drop, &status)) {
864        Mutex::Autolock lock(mLock);
865
866        mMetadataAllow = allow;
867        mMetadataDrop = drop;
868    }
869    return status;
870}
871
872status_t MediaPlayerService::Client::getMetadata(
873        bool update_only, bool apply_filter, Parcel *reply)
874{
875    sp<MediaPlayerBase> player = getPlayer();
876    if (player == 0) return UNKNOWN_ERROR;
877
878    status_t status;
879    // Placeholder for the return code, updated by the caller.
880    reply->writeInt32(-1);
881
882    media::Metadata::Filter ids;
883
884    // We don't block notifications while we fetch the data. We clear
885    // mMetadataUpdated first so we don't lose notifications happening
886    // during the rest of this call.
887    {
888        Mutex::Autolock lock(mLock);
889        if (update_only) {
890            ids = mMetadataUpdated;
891        }
892        mMetadataUpdated.clear();
893    }
894
895    media::Metadata metadata(reply);
896
897    metadata.appendHeader();
898    status = player->getMetadata(ids, reply);
899
900    if (status != OK) {
901        metadata.resetParcel();
902        LOGE("getMetadata failed %d", status);
903        return status;
904    }
905
906    // FIXME: Implement filtering on the result. Not critical since
907    // filtering takes place on the update notifications already. This
908    // would be when all the metadata are fetch and a filter is set.
909
910    // Everything is fine, update the metadata length.
911    metadata.updateLength();
912    return OK;
913}
914
915status_t MediaPlayerService::Client::prepareAsync()
916{
917    LOGV("[%d] prepareAsync", mConnId);
918    sp<MediaPlayerBase> p = getPlayer();
919    if (p == 0) return UNKNOWN_ERROR;
920    status_t ret = p->prepareAsync();
921#if CALLBACK_ANTAGONIZER
922    LOGD("start Antagonizer");
923    if (ret == NO_ERROR) mAntagonizer->start();
924#endif
925    return ret;
926}
927
928status_t MediaPlayerService::Client::start()
929{
930    LOGV("[%d] start", mConnId);
931    sp<MediaPlayerBase> p = getPlayer();
932    if (p == 0) return UNKNOWN_ERROR;
933    p->setLooping(mLoop);
934    return p->start();
935}
936
937status_t MediaPlayerService::Client::stop()
938{
939    LOGV("[%d] stop", mConnId);
940    sp<MediaPlayerBase> p = getPlayer();
941    if (p == 0) return UNKNOWN_ERROR;
942    return p->stop();
943}
944
945status_t MediaPlayerService::Client::pause()
946{
947    LOGV("[%d] pause", mConnId);
948    sp<MediaPlayerBase> p = getPlayer();
949    if (p == 0) return UNKNOWN_ERROR;
950    return p->pause();
951}
952
953status_t MediaPlayerService::Client::isPlaying(bool* state)
954{
955    *state = false;
956    sp<MediaPlayerBase> p = getPlayer();
957    if (p == 0) return UNKNOWN_ERROR;
958    *state = p->isPlaying();
959    LOGV("[%d] isPlaying: %d", mConnId, *state);
960    return NO_ERROR;
961}
962
963status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
964{
965    LOGV("getCurrentPosition");
966    sp<MediaPlayerBase> p = getPlayer();
967    if (p == 0) return UNKNOWN_ERROR;
968    status_t ret = p->getCurrentPosition(msec);
969    if (ret == NO_ERROR) {
970        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
971    } else {
972        LOGE("getCurrentPosition returned %d", ret);
973    }
974    return ret;
975}
976
977status_t MediaPlayerService::Client::getDuration(int *msec)
978{
979    LOGV("getDuration");
980    sp<MediaPlayerBase> p = getPlayer();
981    if (p == 0) return UNKNOWN_ERROR;
982    status_t ret = p->getDuration(msec);
983    if (ret == NO_ERROR) {
984        LOGV("[%d] getDuration = %d", mConnId, *msec);
985    } else {
986        LOGE("getDuration returned %d", ret);
987    }
988    return ret;
989}
990
991status_t MediaPlayerService::Client::seekTo(int msec)
992{
993    LOGV("[%d] seekTo(%d)", mConnId, msec);
994    sp<MediaPlayerBase> p = getPlayer();
995    if (p == 0) return UNKNOWN_ERROR;
996    return p->seekTo(msec);
997}
998
999status_t MediaPlayerService::Client::reset()
1000{
1001    LOGV("[%d] reset", mConnId);
1002    sp<MediaPlayerBase> p = getPlayer();
1003    if (p == 0) return UNKNOWN_ERROR;
1004    return p->reset();
1005}
1006
1007status_t MediaPlayerService::Client::setAudioStreamType(int type)
1008{
1009    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1010    // TODO: for hardware output, call player instead
1011    Mutex::Autolock l(mLock);
1012    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1013    return NO_ERROR;
1014}
1015
1016status_t MediaPlayerService::Client::setLooping(int loop)
1017{
1018    LOGV("[%d] setLooping(%d)", mConnId, loop);
1019    mLoop = loop;
1020    sp<MediaPlayerBase> p = getPlayer();
1021    if (p != 0) return p->setLooping(loop);
1022    return NO_ERROR;
1023}
1024
1025status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1026{
1027    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1028    // TODO: for hardware output, call player instead
1029    Mutex::Autolock l(mLock);
1030    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1031    return NO_ERROR;
1032}
1033
1034
1035void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1036{
1037    Client* client = static_cast<Client*>(cookie);
1038
1039    if (MEDIA_INFO == msg &&
1040        MEDIA_INFO_METADATA_UPDATE == ext1) {
1041        const media::Metadata::Type metadata_type = ext2;
1042
1043        if(client->shouldDropMetadata(metadata_type)) {
1044            return;
1045        }
1046
1047        // Update the list of metadata that have changed. getMetadata
1048        // also access mMetadataUpdated and clears it.
1049        client->addNewMetadataUpdate(metadata_type);
1050    }
1051    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1052    client->mClient->notify(msg, ext1, ext2);
1053}
1054
1055
1056bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1057{
1058    Mutex::Autolock lock(mLock);
1059
1060    if (findMetadata(mMetadataDrop, code)) {
1061        return true;
1062    }
1063
1064    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1065        return false;
1066    } else {
1067        return true;
1068    }
1069}
1070
1071
1072void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1073    Mutex::Autolock lock(mLock);
1074    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1075        mMetadataUpdated.add(metadata_type);
1076    }
1077}
1078
1079#if CALLBACK_ANTAGONIZER
1080const int Antagonizer::interval = 10000; // 10 msecs
1081
1082Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1083    mExit(false), mActive(false), mClient(client), mCb(cb)
1084{
1085    createThread(callbackThread, this);
1086}
1087
1088void Antagonizer::kill()
1089{
1090    Mutex::Autolock _l(mLock);
1091    mActive = false;
1092    mExit = true;
1093    mCondition.wait(mLock);
1094}
1095
1096int Antagonizer::callbackThread(void* user)
1097{
1098    LOGD("Antagonizer started");
1099    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1100    while (!p->mExit) {
1101        if (p->mActive) {
1102            LOGV("send event");
1103            p->mCb(p->mClient, 0, 0, 0);
1104        }
1105        usleep(interval);
1106    }
1107    Mutex::Autolock _l(p->mLock);
1108    p->mCondition.signal();
1109    LOGD("Antagonizer stopped");
1110    return 0;
1111}
1112#endif
1113
1114static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1115
1116sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1117{
1118    LOGV("decode(%s)", url);
1119    sp<MemoryBase> mem;
1120    sp<MediaPlayerBase> player;
1121
1122    // Protect our precious, precious DRMd ringtones by only allowing
1123    // decoding of http, but not filesystem paths or content Uris.
1124    // If the application wants to decode those, it should open a
1125    // filedescriptor for them and use that.
1126    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1127        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1128        return mem;
1129    }
1130
1131    player_type playerType = getPlayerType(url);
1132    LOGV("player type = %d", playerType);
1133
1134    // create the right type of player
1135    sp<AudioCache> cache = new AudioCache(url);
1136    player = android::createPlayer(playerType, cache.get(), cache->notify);
1137    if (player == NULL) goto Exit;
1138    if (player->hardwareOutput()) goto Exit;
1139
1140    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1141
1142    // set data source
1143    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1144
1145    LOGV("prepare");
1146    player->prepareAsync();
1147
1148    LOGV("wait for prepare");
1149    if (cache->wait() != NO_ERROR) goto Exit;
1150
1151    LOGV("start");
1152    player->start();
1153
1154    LOGV("wait for playback complete");
1155    if (cache->wait() != NO_ERROR) goto Exit;
1156
1157    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1158    *pSampleRate = cache->sampleRate();
1159    *pNumChannels = cache->channelCount();
1160    *pFormat = cache->format();
1161    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1162
1163Exit:
1164    if (player != 0) player->reset();
1165    return mem;
1166}
1167
1168sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1169{
1170    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1171    sp<MemoryBase> mem;
1172    sp<MediaPlayerBase> player;
1173
1174    player_type playerType = getPlayerType(fd, offset, length);
1175    LOGV("player type = %d", playerType);
1176
1177    // create the right type of player
1178    sp<AudioCache> cache = new AudioCache("decode_fd");
1179    player = android::createPlayer(playerType, cache.get(), cache->notify);
1180    if (player == NULL) goto Exit;
1181    if (player->hardwareOutput()) goto Exit;
1182
1183    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1184
1185    // set data source
1186    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1187
1188    LOGV("prepare");
1189    player->prepareAsync();
1190
1191    LOGV("wait for prepare");
1192    if (cache->wait() != NO_ERROR) goto Exit;
1193
1194    LOGV("start");
1195    player->start();
1196
1197    LOGV("wait for playback complete");
1198    if (cache->wait() != NO_ERROR) goto Exit;
1199
1200    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1201    *pSampleRate = cache->sampleRate();
1202    *pNumChannels = cache->channelCount();
1203    *pFormat = cache->format();
1204    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1205
1206Exit:
1207    if (player != 0) player->reset();
1208    ::close(fd);
1209    return mem;
1210}
1211
1212/*
1213 * Avert your eyes, ugly hack ahead.
1214 * The following is to support music visualizations.
1215 */
1216
1217static const int NUMVIZBUF = 32;
1218static const int VIZBUFFRAMES = 1024;
1219static const int TOTALBUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1220
1221static bool gotMem = false;
1222static sp<MemoryBase> mem[NUMVIZBUF];
1223static uint64_t timeStamp[NUMVIZBUF];
1224static uint64_t lastReadTime;
1225static uint64_t lastWriteTime;
1226static int writeIdx = 0;
1227
1228static void allocVizBufs() {
1229    if (!gotMem) {
1230        for (int i=0;i<NUMVIZBUF;i++) {
1231            sp<MemoryHeapBase> heap = new MemoryHeapBase(VIZBUFFRAMES*2, 0, "snooper");
1232            mem[i] = new MemoryBase(heap, 0, heap->getSize());
1233            timeStamp[i] = 0;
1234        }
1235        gotMem = true;
1236    }
1237}
1238
1239
1240/*
1241 * Get a buffer of audio data that is about to be played.
1242 * We don't synchronize this because in practice the writer
1243 * is ahead of the reader, and even if we did happen to catch
1244 * a buffer while it's being written, it's just a visualization,
1245 * so no harm done.
1246 */
1247static sp<MemoryBase> getVizBuffer() {
1248
1249    allocVizBufs();
1250
1251    lastReadTime = uptimeMillis() + 100; // account for renderer delay (we shouldn't be doing this here)
1252
1253    // if there is no recent buffer (yet), just return empty handed
1254    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1255        //LOGI("@@@@    no audio data to look at yet");
1256        return NULL;
1257    }
1258
1259    char buf[200];
1260
1261    int closestIdx = -1;
1262    uint32_t closestTime = 0x7ffffff;
1263
1264    for (int i = 0; i < NUMVIZBUF; i++) {
1265        uint64_t tsi = timeStamp[i];
1266        uint64_t diff = tsi > lastReadTime ? tsi - lastReadTime : lastReadTime - tsi;
1267        if (diff < closestTime) {
1268            closestIdx = i;
1269            closestTime = diff;
1270        }
1271    }
1272
1273
1274    if (closestIdx >= 0) {
1275        //LOGI("@@@ return buffer %d, %d/%d", closestIdx, uint32_t(lastReadTime), uint32_t(timeStamp[closestIdx]));
1276        return mem[closestIdx];
1277    }
1278
1279    // we won't get here, since we either bailed out early, or got a buffer
1280    LOGD("Didn't expect to be here");
1281    return NULL;
1282}
1283
1284static void storeVizBuf(const void *data, int len, uint64_t time) {
1285    // Copy the data in to the visualizer buffer
1286    // Assume a 16 bit stereo source for now.
1287    short *viz = (short*)mem[writeIdx]->pointer();
1288    short *src = (short*)data;
1289    for (int i = 0; i < VIZBUFFRAMES; i++) {
1290        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1291        // This should still be good enough for a visualization
1292        *viz++ = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1293        src += 2;
1294    }
1295    timeStamp[writeIdx++] = time;
1296    if (writeIdx >= NUMVIZBUF) {
1297        writeIdx = 0;
1298    }
1299}
1300
1301static void makeVizBuffers(const char *data, int len, uint64_t time) {
1302
1303    allocVizBufs();
1304
1305    uint64_t startTime = time;
1306    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1307    while (len >= VIZBUFFRAMES * frameSize) {
1308        storeVizBuf(data, len, time);
1309        data += VIZBUFFRAMES * frameSize;
1310        len -= VIZBUFFRAMES * frameSize;
1311        time += 1000 * VIZBUFFRAMES / 44100;
1312    }
1313    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1314}
1315
1316sp<IMemory> MediaPlayerService::snoop()
1317{
1318    sp<MemoryBase> mem = getVizBuffer();
1319    return mem;
1320}
1321
1322
1323#undef LOG_TAG
1324#define LOG_TAG "AudioSink"
1325MediaPlayerService::AudioOutput::AudioOutput()
1326    : mCallback(NULL),
1327      mCallbackCookie(NULL) {
1328    mTrack = 0;
1329    mStreamType = AudioSystem::MUSIC;
1330    mLeftVolume = 1.0;
1331    mRightVolume = 1.0;
1332    mLatency = 0;
1333    mMsecsPerFrame = 0;
1334    mNumFramesWritten = 0;
1335    setMinBufferCount();
1336}
1337
1338MediaPlayerService::AudioOutput::~AudioOutput()
1339{
1340    close();
1341}
1342
1343void MediaPlayerService::AudioOutput::setMinBufferCount()
1344{
1345    char value[PROPERTY_VALUE_MAX];
1346    if (property_get("ro.kernel.qemu", value, 0)) {
1347        mIsOnEmulator = true;
1348        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1349    }
1350}
1351
1352bool MediaPlayerService::AudioOutput::isOnEmulator()
1353{
1354    setMinBufferCount();
1355    return mIsOnEmulator;
1356}
1357
1358int MediaPlayerService::AudioOutput::getMinBufferCount()
1359{
1360    setMinBufferCount();
1361    return mMinBufferCount;
1362}
1363
1364ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1365{
1366    if (mTrack == 0) return NO_INIT;
1367    return mTrack->frameCount() * frameSize();
1368}
1369
1370ssize_t MediaPlayerService::AudioOutput::frameCount() const
1371{
1372    if (mTrack == 0) return NO_INIT;
1373    return mTrack->frameCount();
1374}
1375
1376ssize_t MediaPlayerService::AudioOutput::channelCount() const
1377{
1378    if (mTrack == 0) return NO_INIT;
1379    return mTrack->channelCount();
1380}
1381
1382ssize_t MediaPlayerService::AudioOutput::frameSize() const
1383{
1384    if (mTrack == 0) return NO_INIT;
1385    return mTrack->frameSize();
1386}
1387
1388uint32_t MediaPlayerService::AudioOutput::latency () const
1389{
1390    return mLatency;
1391}
1392
1393float MediaPlayerService::AudioOutput::msecsPerFrame() const
1394{
1395    return mMsecsPerFrame;
1396}
1397
1398status_t MediaPlayerService::AudioOutput::open(
1399        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1400        AudioCallback cb, void *cookie)
1401{
1402    mCallback = cb;
1403    mCallbackCookie = cookie;
1404
1405    // Check argument "bufferCount" against the mininum buffer count
1406    if (bufferCount < mMinBufferCount) {
1407        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1408        bufferCount = mMinBufferCount;
1409
1410    }
1411    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1412    if (mTrack) close();
1413    int afSampleRate;
1414    int afFrameCount;
1415    int frameCount;
1416
1417    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1418        return NO_INIT;
1419    }
1420    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1421        return NO_INIT;
1422    }
1423
1424    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1425
1426    AudioTrack *t;
1427    if (mCallback != NULL) {
1428        t = new AudioTrack(
1429                mStreamType,
1430                sampleRate,
1431                format,
1432                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1433                frameCount,
1434                0 /* flags */,
1435                CallbackWrapper,
1436                this);
1437    } else {
1438        t = new AudioTrack(
1439                mStreamType,
1440                sampleRate,
1441                format,
1442                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1443                frameCount);
1444    }
1445
1446    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1447        LOGE("Unable to create audio track");
1448        delete t;
1449        return NO_INIT;
1450    }
1451
1452    LOGV("setVolume");
1453    t->setVolume(mLeftVolume, mRightVolume);
1454    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1455    mLatency = t->latency() + kAudioVideoDelayMs;
1456    mTrack = t;
1457    return NO_ERROR;
1458}
1459
1460void MediaPlayerService::AudioOutput::start()
1461{
1462    LOGV("start");
1463    if (mTrack) {
1464        mTrack->setVolume(mLeftVolume, mRightVolume);
1465        mTrack->start();
1466        mTrack->getPosition(&mNumFramesWritten);
1467    }
1468}
1469
1470ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1471{
1472    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1473
1474    //LOGV("write(%p, %u)", buffer, size);
1475    if (mTrack) {
1476        // Only make visualization buffers if anyone recently requested visualization data
1477        uint64_t now = uptimeMillis();
1478        if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1479            // Based on the current play counter, the number of frames written and
1480            // the current real time we can calculate the approximate real start
1481            // time of the buffer we're about to write.
1482            uint32_t pos;
1483            mTrack->getPosition(&pos);
1484
1485            // we're writing ahead by this many frames:
1486            int ahead = mNumFramesWritten - pos;
1487            //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1488            // which is this many milliseconds, assuming 44100 Hz:
1489            ahead /= 44;
1490
1491            makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1492            lastWriteTime = now;
1493        }
1494        ssize_t ret = mTrack->write(buffer, size);
1495        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1496        return ret;
1497    }
1498    return NO_INIT;
1499}
1500
1501void MediaPlayerService::AudioOutput::stop()
1502{
1503    LOGV("stop");
1504    if (mTrack) mTrack->stop();
1505    lastWriteTime = 0;
1506}
1507
1508void MediaPlayerService::AudioOutput::flush()
1509{
1510    LOGV("flush");
1511    if (mTrack) mTrack->flush();
1512}
1513
1514void MediaPlayerService::AudioOutput::pause()
1515{
1516    LOGV("pause");
1517    if (mTrack) mTrack->pause();
1518    lastWriteTime = 0;
1519}
1520
1521void MediaPlayerService::AudioOutput::close()
1522{
1523    LOGV("close");
1524    delete mTrack;
1525    mTrack = 0;
1526}
1527
1528void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1529{
1530    LOGV("setVolume(%f, %f)", left, right);
1531    mLeftVolume = left;
1532    mRightVolume = right;
1533    if (mTrack) {
1534        mTrack->setVolume(left, right);
1535    }
1536}
1537
1538// static
1539void MediaPlayerService::AudioOutput::CallbackWrapper(
1540        int event, void *cookie, void *info) {
1541    if (event != AudioTrack::EVENT_MORE_DATA) {
1542        return;
1543    }
1544
1545    AudioOutput *me = (AudioOutput *)cookie;
1546    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1547
1548    (*me->mCallback)(
1549            me, buffer->raw, buffer->size, me->mCallbackCookie);
1550}
1551
1552#undef LOG_TAG
1553#define LOG_TAG "AudioCache"
1554MediaPlayerService::AudioCache::AudioCache(const char* name) :
1555    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1556    mError(NO_ERROR), mCommandComplete(false)
1557{
1558    // create ashmem heap
1559    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1560}
1561
1562uint32_t MediaPlayerService::AudioCache::latency () const
1563{
1564    return 0;
1565}
1566
1567float MediaPlayerService::AudioCache::msecsPerFrame() const
1568{
1569    return mMsecsPerFrame;
1570}
1571
1572status_t MediaPlayerService::AudioCache::open(
1573        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1574        AudioCallback cb, void *cookie)
1575{
1576    if (cb != NULL) {
1577        return UNKNOWN_ERROR;  // TODO: implement this.
1578    }
1579
1580    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1581    if (mHeap->getHeapID() < 0) return NO_INIT;
1582    mSampleRate = sampleRate;
1583    mChannelCount = (uint16_t)channelCount;
1584    mFormat = (uint16_t)format;
1585    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1586    return NO_ERROR;
1587}
1588
1589ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1590{
1591    LOGV("write(%p, %u)", buffer, size);
1592    if ((buffer == 0) || (size == 0)) return size;
1593
1594    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1595    if (p == NULL) return NO_INIT;
1596    p += mSize;
1597    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1598    if (mSize + size > mHeap->getSize()) {
1599        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1600        size = mHeap->getSize() - mSize;
1601    }
1602    memcpy(p, buffer, size);
1603    mSize += size;
1604    return size;
1605}
1606
1607// call with lock held
1608status_t MediaPlayerService::AudioCache::wait()
1609{
1610    Mutex::Autolock lock(mLock);
1611    if (!mCommandComplete) {
1612        mSignal.wait(mLock);
1613    }
1614    mCommandComplete = false;
1615
1616    if (mError == NO_ERROR) {
1617        LOGV("wait - success");
1618    } else {
1619        LOGV("wait - error");
1620    }
1621    return mError;
1622}
1623
1624void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1625{
1626    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1627    AudioCache* p = static_cast<AudioCache*>(cookie);
1628
1629    // ignore buffering messages
1630    if (msg == MEDIA_BUFFERING_UPDATE) return;
1631
1632    // set error condition
1633    if (msg == MEDIA_ERROR) {
1634        LOGE("Error %d, %d occurred", ext1, ext2);
1635        p->mError = ext1;
1636    }
1637
1638    // wake up thread
1639    LOGV("wakeup thread");
1640    p->mCommandComplete = true;
1641    p->mSignal.signal();
1642}
1643
1644} // namespace android
1645