MediaPlayerService.cpp revision 1d711f67ffb3ea73aca155537e0f21b444251158 
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 */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
206/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
207
208void MediaPlayerService::instantiate() {
209    defaultServiceManager()->addService(
210            String16("media.player"), new MediaPlayerService());
211}
212
213MediaPlayerService::MediaPlayerService()
214{
215    LOGV("MediaPlayerService created");
216    mNextConnId = 1;
217}
218
219MediaPlayerService::~MediaPlayerService()
220{
221    LOGV("MediaPlayerService destroyed");
222}
223
224sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
225{
226#ifndef NO_OPENCORE
227    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
228    wp<MediaRecorderClient> w = recorder;
229    Mutex::Autolock lock(mLock);
230    mMediaRecorderClients.add(w);
231#else
232    sp<MediaRecorderClient> recorder = NULL;
233#endif
234    LOGV("Create new media recorder client from pid %d", pid);
235    return recorder;
236}
237
238void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
239{
240    Mutex::Autolock lock(mLock);
241    mMediaRecorderClients.remove(client);
242    LOGV("Delete media recorder client");
243}
244
245sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
246{
247    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
248    LOGV("Create new media retriever from pid %d", pid);
249    return retriever;
250}
251
252sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
253{
254    int32_t connId = android_atomic_inc(&mNextConnId);
255    sp<Client> c = new Client(this, pid, connId, client);
256    LOGV("Create new client(%d) from pid %d, url=%s, connId=%d", connId, pid, url, connId);
257    if (NO_ERROR != c->setDataSource(url))
258    {
259        c.clear();
260        return c;
261    }
262    wp<Client> w = c;
263    Mutex::Autolock lock(mLock);
264    mClients.add(w);
265    return c;
266}
267
268sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
269        int fd, int64_t offset, int64_t length)
270{
271    int32_t connId = android_atomic_inc(&mNextConnId);
272    sp<Client> c = new Client(this, pid, connId, client);
273    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
274            connId, pid, fd, offset, length);
275    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
276        c.clear();
277    } else {
278        wp<Client> w = c;
279        Mutex::Autolock lock(mLock);
280        mClients.add(w);
281    }
282    ::close(fd);
283    return c;
284}
285
286sp<IOMX> MediaPlayerService::getOMX() {
287    Mutex::Autolock autoLock(mLock);
288
289    if (mOMX.get() == NULL) {
290        mOMX = new OMX;
291    }
292
293    return mOMX;
294}
295
296status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
297{
298    const size_t SIZE = 256;
299    char buffer[SIZE];
300    String8 result;
301
302    result.append(" AudioCache\n");
303    if (mHeap != 0) {
304        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
305                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
306        result.append(buffer);
307    }
308    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
309            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
310    result.append(buffer);
311    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
312            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
313    result.append(buffer);
314    ::write(fd, result.string(), result.size());
315    return NO_ERROR;
316}
317
318status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
319{
320    const size_t SIZE = 256;
321    char buffer[SIZE];
322    String8 result;
323
324    result.append(" AudioOutput\n");
325    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
326            mStreamType, mLeftVolume, mRightVolume);
327    result.append(buffer);
328    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
329            mMsecsPerFrame, mLatency);
330    result.append(buffer);
331    ::write(fd, result.string(), result.size());
332    if (mTrack != 0) {
333        mTrack->dump(fd, args);
334    }
335    return NO_ERROR;
336}
337
338status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
339{
340    const size_t SIZE = 256;
341    char buffer[SIZE];
342    String8 result;
343    result.append(" Client\n");
344    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
345            mPid, mConnId, mStatus, mLoop?"true": "false");
346    result.append(buffer);
347    write(fd, result.string(), result.size());
348    if (mAudioOutput != 0) {
349        mAudioOutput->dump(fd, args);
350    }
351    write(fd, "\n", 1);
352    return NO_ERROR;
353}
354
355static int myTid() {
356#ifdef HAVE_GETTID
357    return gettid();
358#else
359    return getpid();
360#endif
361}
362
363#if defined(__arm__)
364extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
365        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
366extern "C" void free_malloc_leak_info(uint8_t* info);
367
368// Use the String-class below instead of String8 to allocate all memory
369// beforehand and not reenter the heap while we are examining it...
370struct MyString8 {
371    static const size_t MAX_SIZE = 256 * 1024;
372
373    MyString8()
374        : mPtr((char *)malloc(MAX_SIZE)) {
375        *mPtr = '\0';
376    }
377
378    ~MyString8() {
379        free(mPtr);
380    }
381
382    void append(const char *s) {
383        strcat(mPtr, s);
384    }
385
386    const char *string() const {
387        return mPtr;
388    }
389
390    size_t size() const {
391        return strlen(mPtr);
392    }
393
394private:
395    char *mPtr;
396
397    MyString8(const MyString8 &);
398    MyString8 &operator=(const MyString8 &);
399};
400
401void memStatus(int fd, const Vector<String16>& args)
402{
403    const size_t SIZE = 256;
404    char buffer[SIZE];
405    MyString8 result;
406
407    typedef struct {
408        size_t size;
409        size_t dups;
410        intptr_t * backtrace;
411    } AllocEntry;
412
413    uint8_t *info = NULL;
414    size_t overallSize = 0;
415    size_t infoSize = 0;
416    size_t totalMemory = 0;
417    size_t backtraceSize = 0;
418
419    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
420    if (info) {
421        uint8_t *ptr = info;
422        size_t count = overallSize / infoSize;
423
424        snprintf(buffer, SIZE, " Allocation count %i\n", count);
425        result.append(buffer);
426
427        AllocEntry * entries = new AllocEntry[count];
428
429        for (size_t i = 0; i < count; i++) {
430            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
431            AllocEntry *e = &entries[i];
432
433            e->size = *reinterpret_cast<size_t *>(ptr);
434            ptr += sizeof(size_t);
435
436            e->dups = *reinterpret_cast<size_t *>(ptr);
437            ptr += sizeof(size_t);
438
439            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
440            ptr += sizeof(intptr_t) * backtraceSize;
441        }
442
443        // Now we need to sort the entries.  They come sorted by size but
444        // not by stack trace which causes problems using diff.
445        bool moved;
446        do {
447            moved = false;
448            for (size_t i = 0; i < (count - 1); i++) {
449                AllocEntry *e1 = &entries[i];
450                AllocEntry *e2 = &entries[i+1];
451
452                bool swap = e1->size < e2->size;
453                if (e1->size == e2->size) {
454                    for(size_t j = 0; j < backtraceSize; j++) {
455                        if (e1->backtrace[j] == e2->backtrace[j]) {
456                            continue;
457                        }
458                        swap = e1->backtrace[j] < e2->backtrace[j];
459                        break;
460                    }
461                }
462                if (swap) {
463                    AllocEntry t = entries[i];
464                    entries[i] = entries[i+1];
465                    entries[i+1] = t;
466                    moved = true;
467                }
468            }
469        } while (moved);
470
471        for (size_t i = 0; i < count; i++) {
472            AllocEntry *e = &entries[i];
473
474            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
475            result.append(buffer);
476            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
477                if (ct) {
478                    result.append(", ");
479                }
480                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
481                result.append(buffer);
482            }
483            result.append("\n");
484        }
485
486        delete[] entries;
487        free_malloc_leak_info(info);
488    }
489
490    write(fd, result.string(), result.size());
491}
492#endif
493
494status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
495{
496    const size_t SIZE = 256;
497    char buffer[SIZE];
498    String8 result;
499    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
500        snprintf(buffer, SIZE, "Permission Denial: "
501                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
502                IPCThreadState::self()->getCallingPid(),
503                IPCThreadState::self()->getCallingUid());
504        result.append(buffer);
505    } else {
506        Mutex::Autolock lock(mLock);
507        for (int i = 0, n = mClients.size(); i < n; ++i) {
508            sp<Client> c = mClients[i].promote();
509            if (c != 0) c->dump(fd, args);
510        }
511        for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
512            result.append(" MediaRecorderClient\n");
513            sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
514            snprintf(buffer, 255, "  pid(%d)\n\n", c->mPid);
515            result.append(buffer);
516        }
517
518        result.append(" Files opened and/or mapped:\n");
519        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
520        FILE *f = fopen(buffer, "r");
521        if (f) {
522            while (!feof(f)) {
523                fgets(buffer, SIZE, f);
524                if (strstr(buffer, " /sdcard/") ||
525                    strstr(buffer, " /system/sounds/") ||
526                    strstr(buffer, " /system/media/")) {
527                    result.append("  ");
528                    result.append(buffer);
529                }
530            }
531            fclose(f);
532        } else {
533            result.append("couldn't open ");
534            result.append(buffer);
535            result.append("\n");
536        }
537
538        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
539        DIR *d = opendir(buffer);
540        if (d) {
541            struct dirent *ent;
542            while((ent = readdir(d)) != NULL) {
543                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
544                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
545                    struct stat s;
546                    if (lstat(buffer, &s) == 0) {
547                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
548                            char linkto[256];
549                            int len = readlink(buffer, linkto, sizeof(linkto));
550                            if(len > 0) {
551                                if(len > 255) {
552                                    linkto[252] = '.';
553                                    linkto[253] = '.';
554                                    linkto[254] = '.';
555                                    linkto[255] = 0;
556                                } else {
557                                    linkto[len] = 0;
558                                }
559                                if (strstr(linkto, "/sdcard/") == linkto ||
560                                    strstr(linkto, "/system/sounds/") == linkto ||
561                                    strstr(linkto, "/system/media/") == linkto) {
562                                    result.append("  ");
563                                    result.append(buffer);
564                                    result.append(" -> ");
565                                    result.append(linkto);
566                                    result.append("\n");
567                                }
568                            }
569                        } else {
570                            result.append("  unexpected type for ");
571                            result.append(buffer);
572                            result.append("\n");
573                        }
574                    }
575                }
576            }
577            closedir(d);
578        } else {
579            result.append("couldn't open ");
580            result.append(buffer);
581            result.append("\n");
582        }
583
584#if defined(__arm__)
585        bool dumpMem = false;
586        for (size_t i = 0; i < args.size(); i++) {
587            if (args[i] == String16("-m")) {
588                dumpMem = true;
589            }
590        }
591        if (dumpMem) {
592            memStatus(fd, args);
593        }
594#endif
595    }
596    write(fd, result.string(), result.size());
597    return NO_ERROR;
598}
599
600void MediaPlayerService::removeClient(wp<Client> client)
601{
602    Mutex::Autolock lock(mLock);
603    mClients.remove(client);
604}
605
606MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
607        int32_t connId, const sp<IMediaPlayerClient>& client)
608{
609    LOGV("Client(%d) constructor", connId);
610    mPid = pid;
611    mConnId = connId;
612    mService = service;
613    mClient = client;
614    mLoop = false;
615    mStatus = NO_INIT;
616#if CALLBACK_ANTAGONIZER
617    LOGD("create Antagonizer");
618    mAntagonizer = new Antagonizer(notify, this);
619#endif
620}
621
622MediaPlayerService::Client::~Client()
623{
624    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
625    mAudioOutput.clear();
626    wp<Client> client(this);
627    disconnect();
628    mService->removeClient(client);
629}
630
631void MediaPlayerService::Client::disconnect()
632{
633    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
634    // grab local reference and clear main reference to prevent future
635    // access to object
636    sp<MediaPlayerBase> p;
637    {
638        Mutex::Autolock l(mLock);
639        p = mPlayer;
640    }
641    mClient.clear();
642
643    mPlayer.clear();
644
645    // clear the notification to prevent callbacks to dead client
646    // and reset the player. We assume the player will serialize
647    // access to itself if necessary.
648    if (p != 0) {
649        p->setNotifyCallback(0, 0);
650#if CALLBACK_ANTAGONIZER
651        LOGD("kill Antagonizer");
652        mAntagonizer->kill();
653#endif
654        p->reset();
655    }
656
657    IPCThreadState::self()->flushCommands();
658}
659
660static player_type getDefaultPlayerType() {
661#if BUILD_WITH_FULL_STAGEFRIGHT
662    char value[PROPERTY_VALUE_MAX];
663    if (property_get("media.stagefright.enable-player", value, NULL)
664        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
665        return STAGEFRIGHT_PLAYER;
666    }
667#endif
668
669    return PV_PLAYER;
670}
671
672player_type getPlayerType(int fd, int64_t offset, int64_t length)
673{
674    char buf[20];
675    lseek(fd, offset, SEEK_SET);
676    read(fd, buf, sizeof(buf));
677    lseek(fd, offset, SEEK_SET);
678
679    long ident = *((long*)buf);
680
681    // Ogg vorbis?
682    if (ident == 0x5367674f) // 'OggS'
683        return VORBIS_PLAYER;
684
685    // Some kind of MIDI?
686    EAS_DATA_HANDLE easdata;
687    if (EAS_Init(&easdata) == EAS_SUCCESS) {
688        EAS_FILE locator;
689        locator.path = NULL;
690        locator.fd = fd;
691        locator.offset = offset;
692        locator.length = length;
693        EAS_HANDLE  eashandle;
694        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
695            EAS_CloseFile(easdata, eashandle);
696            EAS_Shutdown(easdata);
697            return SONIVOX_PLAYER;
698        }
699        EAS_Shutdown(easdata);
700    }
701
702    return getDefaultPlayerType();
703}
704
705player_type getPlayerType(const char* url)
706{
707    if (TestPlayerStub::canBeUsed(url)) {
708        return TEST_PLAYER;
709    }
710
711    // use MidiFile for MIDI extensions
712    int lenURL = strlen(url);
713    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
714        int len = strlen(FILE_EXTS[i].extension);
715        int start = lenURL - len;
716        if (start > 0) {
717            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
718                return FILE_EXTS[i].playertype;
719            }
720        }
721    }
722
723    return getDefaultPlayerType();
724}
725
726static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
727        notify_callback_f notifyFunc)
728{
729    sp<MediaPlayerBase> p;
730    switch (playerType) {
731#ifndef NO_OPENCORE
732        case PV_PLAYER:
733            LOGV(" create PVPlayer");
734            p = new PVPlayer();
735            break;
736#endif
737        case SONIVOX_PLAYER:
738            LOGV(" create MidiFile");
739            p = new MidiFile();
740            break;
741        case VORBIS_PLAYER:
742            LOGV(" create VorbisPlayer");
743            p = new VorbisPlayer();
744            break;
745#if BUILD_WITH_FULL_STAGEFRIGHT
746        case STAGEFRIGHT_PLAYER:
747            LOGV(" create StagefrightPlayer");
748            p = new StagefrightPlayer;
749            break;
750#endif
751        case TEST_PLAYER:
752            LOGV("Create Test Player stub");
753            p = new TestPlayerStub();
754            break;
755    }
756    if (p != NULL) {
757        if (p->initCheck() == NO_ERROR) {
758            p->setNotifyCallback(cookie, notifyFunc);
759        } else {
760            p.clear();
761        }
762    }
763    if (p == NULL) {
764        LOGE("Failed to create player object");
765    }
766    return p;
767}
768
769sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
770{
771    // determine if we have the right player type
772    sp<MediaPlayerBase> p = mPlayer;
773    if ((p != NULL) && (p->playerType() != playerType)) {
774        LOGV("delete player");
775        p.clear();
776    }
777    if (p == NULL) {
778        p = android::createPlayer(playerType, this, notify);
779    }
780    return p;
781}
782
783status_t MediaPlayerService::Client::setDataSource(const char *url)
784{
785    LOGV("setDataSource(%s)", url);
786    if (url == NULL)
787        return UNKNOWN_ERROR;
788
789    if (strncmp(url, "content://", 10) == 0) {
790        // get a filedescriptor for the content Uri and
791        // pass it to the setDataSource(fd) method
792
793        String16 url16(url);
794        int fd = android::openContentProviderFile(url16);
795        if (fd < 0)
796        {
797            LOGE("Couldn't open fd for %s", url);
798            return UNKNOWN_ERROR;
799        }
800        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
801        close(fd);
802        return mStatus;
803    } else {
804        player_type playerType = getPlayerType(url);
805        LOGV("player type = %d", playerType);
806
807        // create the right type of player
808        sp<MediaPlayerBase> p = createPlayer(playerType);
809        if (p == NULL) return NO_INIT;
810
811        if (!p->hardwareOutput()) {
812            mAudioOutput = new AudioOutput();
813            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
814        }
815
816        // now set data source
817        LOGV(" setDataSource");
818        mStatus = p->setDataSource(url);
819        if (mStatus == NO_ERROR) {
820            mPlayer = p;
821        } else {
822            LOGE("  error: %d", mStatus);
823        }
824        return mStatus;
825    }
826}
827
828status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
829{
830    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
831    struct stat sb;
832    int ret = fstat(fd, &sb);
833    if (ret != 0) {
834        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
835        return UNKNOWN_ERROR;
836    }
837
838    LOGV("st_dev  = %llu", sb.st_dev);
839    LOGV("st_mode = %u", sb.st_mode);
840    LOGV("st_uid  = %lu", sb.st_uid);
841    LOGV("st_gid  = %lu", sb.st_gid);
842    LOGV("st_size = %llu", sb.st_size);
843
844    if (offset >= sb.st_size) {
845        LOGE("offset error");
846        ::close(fd);
847        return UNKNOWN_ERROR;
848    }
849    if (offset + length > sb.st_size) {
850        length = sb.st_size - offset;
851        LOGV("calculated length = %lld", length);
852    }
853
854    player_type playerType = getPlayerType(fd, offset, length);
855    LOGV("player type = %d", playerType);
856
857    // create the right type of player
858    sp<MediaPlayerBase> p = createPlayer(playerType);
859    if (p == NULL) return NO_INIT;
860
861    if (!p->hardwareOutput()) {
862        mAudioOutput = new AudioOutput();
863        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
864    }
865
866    // now set data source
867    mStatus = p->setDataSource(fd, offset, length);
868    if (mStatus == NO_ERROR) mPlayer = p;
869    return mStatus;
870}
871
872status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
873{
874    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
875    sp<MediaPlayerBase> p = getPlayer();
876    if (p == 0) return UNKNOWN_ERROR;
877    return p->setVideoSurface(surface);
878}
879
880status_t MediaPlayerService::Client::invoke(const Parcel& request,
881                                            Parcel *reply)
882{
883    sp<MediaPlayerBase> p = getPlayer();
884    if (p == NULL) return UNKNOWN_ERROR;
885    return p->invoke(request, reply);
886}
887
888// This call doesn't need to access the native player.
889status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
890{
891    status_t status;
892    media::Metadata::Filter allow, drop;
893
894    if (unmarshallFilter(filter, &allow, &status) &&
895        unmarshallFilter(filter, &drop, &status)) {
896        Mutex::Autolock lock(mLock);
897
898        mMetadataAllow = allow;
899        mMetadataDrop = drop;
900    }
901    return status;
902}
903
904status_t MediaPlayerService::Client::getMetadata(
905        bool update_only, bool apply_filter, Parcel *reply)
906{
907    sp<MediaPlayerBase> player = getPlayer();
908    if (player == 0) return UNKNOWN_ERROR;
909
910    status_t status;
911    // Placeholder for the return code, updated by the caller.
912    reply->writeInt32(-1);
913
914    media::Metadata::Filter ids;
915
916    // We don't block notifications while we fetch the data. We clear
917    // mMetadataUpdated first so we don't lose notifications happening
918    // during the rest of this call.
919    {
920        Mutex::Autolock lock(mLock);
921        if (update_only) {
922            ids = mMetadataUpdated;
923        }
924        mMetadataUpdated.clear();
925    }
926
927    media::Metadata metadata(reply);
928
929    metadata.appendHeader();
930    status = player->getMetadata(ids, reply);
931
932    if (status != OK) {
933        metadata.resetParcel();
934        LOGE("getMetadata failed %d", status);
935        return status;
936    }
937
938    // FIXME: Implement filtering on the result. Not critical since
939    // filtering takes place on the update notifications already. This
940    // would be when all the metadata are fetch and a filter is set.
941
942    // Everything is fine, update the metadata length.
943    metadata.updateLength();
944    return OK;
945}
946
947status_t MediaPlayerService::Client::prepareAsync()
948{
949    LOGV("[%d] prepareAsync", mConnId);
950    sp<MediaPlayerBase> p = getPlayer();
951    if (p == 0) return UNKNOWN_ERROR;
952    status_t ret = p->prepareAsync();
953#if CALLBACK_ANTAGONIZER
954    LOGD("start Antagonizer");
955    if (ret == NO_ERROR) mAntagonizer->start();
956#endif
957    return ret;
958}
959
960status_t MediaPlayerService::Client::start()
961{
962    LOGV("[%d] start", mConnId);
963    sp<MediaPlayerBase> p = getPlayer();
964    if (p == 0) return UNKNOWN_ERROR;
965    p->setLooping(mLoop);
966    return p->start();
967}
968
969status_t MediaPlayerService::Client::stop()
970{
971    LOGV("[%d] stop", mConnId);
972    sp<MediaPlayerBase> p = getPlayer();
973    if (p == 0) return UNKNOWN_ERROR;
974    return p->stop();
975}
976
977status_t MediaPlayerService::Client::pause()
978{
979    LOGV("[%d] pause", mConnId);
980    sp<MediaPlayerBase> p = getPlayer();
981    if (p == 0) return UNKNOWN_ERROR;
982    return p->pause();
983}
984
985status_t MediaPlayerService::Client::isPlaying(bool* state)
986{
987    *state = false;
988    sp<MediaPlayerBase> p = getPlayer();
989    if (p == 0) return UNKNOWN_ERROR;
990    *state = p->isPlaying();
991    LOGV("[%d] isPlaying: %d", mConnId, *state);
992    return NO_ERROR;
993}
994
995status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
996{
997    LOGV("getCurrentPosition");
998    sp<MediaPlayerBase> p = getPlayer();
999    if (p == 0) return UNKNOWN_ERROR;
1000    status_t ret = p->getCurrentPosition(msec);
1001    if (ret == NO_ERROR) {
1002        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1003    } else {
1004        LOGE("getCurrentPosition returned %d", ret);
1005    }
1006    return ret;
1007}
1008
1009status_t MediaPlayerService::Client::getDuration(int *msec)
1010{
1011    LOGV("getDuration");
1012    sp<MediaPlayerBase> p = getPlayer();
1013    if (p == 0) return UNKNOWN_ERROR;
1014    status_t ret = p->getDuration(msec);
1015    if (ret == NO_ERROR) {
1016        LOGV("[%d] getDuration = %d", mConnId, *msec);
1017    } else {
1018        LOGE("getDuration returned %d", ret);
1019    }
1020    return ret;
1021}
1022
1023status_t MediaPlayerService::Client::seekTo(int msec)
1024{
1025    LOGV("[%d] seekTo(%d)", mConnId, msec);
1026    sp<MediaPlayerBase> p = getPlayer();
1027    if (p == 0) return UNKNOWN_ERROR;
1028    return p->seekTo(msec);
1029}
1030
1031status_t MediaPlayerService::Client::reset()
1032{
1033    LOGV("[%d] reset", mConnId);
1034    sp<MediaPlayerBase> p = getPlayer();
1035    if (p == 0) return UNKNOWN_ERROR;
1036    return p->reset();
1037}
1038
1039status_t MediaPlayerService::Client::setAudioStreamType(int type)
1040{
1041    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1042    // TODO: for hardware output, call player instead
1043    Mutex::Autolock l(mLock);
1044    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1045    return NO_ERROR;
1046}
1047
1048status_t MediaPlayerService::Client::setLooping(int loop)
1049{
1050    LOGV("[%d] setLooping(%d)", mConnId, loop);
1051    mLoop = loop;
1052    sp<MediaPlayerBase> p = getPlayer();
1053    if (p != 0) return p->setLooping(loop);
1054    return NO_ERROR;
1055}
1056
1057status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1058{
1059    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1060    // TODO: for hardware output, call player instead
1061    Mutex::Autolock l(mLock);
1062    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1063    return NO_ERROR;
1064}
1065
1066
1067void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1068{
1069    Client* client = static_cast<Client*>(cookie);
1070
1071    if (MEDIA_INFO == msg &&
1072        MEDIA_INFO_METADATA_UPDATE == ext1) {
1073        const media::Metadata::Type metadata_type = ext2;
1074
1075        if(client->shouldDropMetadata(metadata_type)) {
1076            return;
1077        }
1078
1079        // Update the list of metadata that have changed. getMetadata
1080        // also access mMetadataUpdated and clears it.
1081        client->addNewMetadataUpdate(metadata_type);
1082    }
1083    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1084    client->mClient->notify(msg, ext1, ext2);
1085}
1086
1087
1088bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1089{
1090    Mutex::Autolock lock(mLock);
1091
1092    if (findMetadata(mMetadataDrop, code)) {
1093        return true;
1094    }
1095
1096    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1097        return false;
1098    } else {
1099        return true;
1100    }
1101}
1102
1103
1104void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1105    Mutex::Autolock lock(mLock);
1106    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1107        mMetadataUpdated.add(metadata_type);
1108    }
1109}
1110
1111#if CALLBACK_ANTAGONIZER
1112const int Antagonizer::interval = 10000; // 10 msecs
1113
1114Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1115    mExit(false), mActive(false), mClient(client), mCb(cb)
1116{
1117    createThread(callbackThread, this);
1118}
1119
1120void Antagonizer::kill()
1121{
1122    Mutex::Autolock _l(mLock);
1123    mActive = false;
1124    mExit = true;
1125    mCondition.wait(mLock);
1126}
1127
1128int Antagonizer::callbackThread(void* user)
1129{
1130    LOGD("Antagonizer started");
1131    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1132    while (!p->mExit) {
1133        if (p->mActive) {
1134            LOGV("send event");
1135            p->mCb(p->mClient, 0, 0, 0);
1136        }
1137        usleep(interval);
1138    }
1139    Mutex::Autolock _l(p->mLock);
1140    p->mCondition.signal();
1141    LOGD("Antagonizer stopped");
1142    return 0;
1143}
1144#endif
1145
1146static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1147
1148sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1149{
1150    LOGV("decode(%s)", url);
1151    sp<MemoryBase> mem;
1152    sp<MediaPlayerBase> player;
1153
1154    // Protect our precious, precious DRMd ringtones by only allowing
1155    // decoding of http, but not filesystem paths or content Uris.
1156    // If the application wants to decode those, it should open a
1157    // filedescriptor for them and use that.
1158    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1159        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1160        return mem;
1161    }
1162
1163    player_type playerType = getPlayerType(url);
1164    LOGV("player type = %d", playerType);
1165
1166    // create the right type of player
1167    sp<AudioCache> cache = new AudioCache(url);
1168    player = android::createPlayer(playerType, cache.get(), cache->notify);
1169    if (player == NULL) goto Exit;
1170    if (player->hardwareOutput()) goto Exit;
1171
1172    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1173
1174    // set data source
1175    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1176
1177    LOGV("prepare");
1178    player->prepareAsync();
1179
1180    LOGV("wait for prepare");
1181    if (cache->wait() != NO_ERROR) goto Exit;
1182
1183    LOGV("start");
1184    player->start();
1185
1186    LOGV("wait for playback complete");
1187    if (cache->wait() != NO_ERROR) goto Exit;
1188
1189    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1190    *pSampleRate = cache->sampleRate();
1191    *pNumChannels = cache->channelCount();
1192    *pFormat = cache->format();
1193    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1194
1195Exit:
1196    if (player != 0) player->reset();
1197    return mem;
1198}
1199
1200sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1201{
1202    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1203    sp<MemoryBase> mem;
1204    sp<MediaPlayerBase> player;
1205
1206    player_type playerType = getPlayerType(fd, offset, length);
1207    LOGV("player type = %d", playerType);
1208
1209    // create the right type of player
1210    sp<AudioCache> cache = new AudioCache("decode_fd");
1211    player = android::createPlayer(playerType, cache.get(), cache->notify);
1212    if (player == NULL) goto Exit;
1213    if (player->hardwareOutput()) goto Exit;
1214
1215    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1216
1217    // set data source
1218    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1219
1220    LOGV("prepare");
1221    player->prepareAsync();
1222
1223    LOGV("wait for prepare");
1224    if (cache->wait() != NO_ERROR) goto Exit;
1225
1226    LOGV("start");
1227    player->start();
1228
1229    LOGV("wait for playback complete");
1230    if (cache->wait() != NO_ERROR) goto Exit;
1231
1232    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1233    *pSampleRate = cache->sampleRate();
1234    *pNumChannels = cache->channelCount();
1235    *pFormat = cache->format();
1236    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1237
1238Exit:
1239    if (player != 0) player->reset();
1240    ::close(fd);
1241    return mem;
1242}
1243
1244/*
1245 * Avert your eyes, ugly hack ahead.
1246 * The following is to support music visualizations.
1247 */
1248
1249static const int NUMVIZBUF = 32;
1250static const int VIZBUFFRAMES = 1024;
1251static const int TOTALBUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1252
1253static bool gotMem = false;
1254static sp<MemoryBase> mem[NUMVIZBUF];
1255static uint64_t timeStamp[NUMVIZBUF];
1256static uint64_t lastReadTime;
1257static uint64_t lastWriteTime;
1258static int writeIdx = 0;
1259
1260static void allocVizBufs() {
1261    if (!gotMem) {
1262        for (int i=0;i<NUMVIZBUF;i++) {
1263            sp<MemoryHeapBase> heap = new MemoryHeapBase(VIZBUFFRAMES*2, 0, "snooper");
1264            mem[i] = new MemoryBase(heap, 0, heap->getSize());
1265            timeStamp[i] = 0;
1266        }
1267        gotMem = true;
1268    }
1269}
1270
1271
1272/*
1273 * Get a buffer of audio data that is about to be played.
1274 * We don't synchronize this because in practice the writer
1275 * is ahead of the reader, and even if we did happen to catch
1276 * a buffer while it's being written, it's just a visualization,
1277 * so no harm done.
1278 */
1279static sp<MemoryBase> getVizBuffer() {
1280
1281    allocVizBufs();
1282
1283    lastReadTime = uptimeMillis() + 100; // account for renderer delay (we shouldn't be doing this here)
1284
1285    // if there is no recent buffer (yet), just return empty handed
1286    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1287        //LOGI("@@@@    no audio data to look at yet");
1288        return NULL;
1289    }
1290
1291    char buf[200];
1292
1293    int closestIdx = -1;
1294    uint32_t closestTime = 0x7ffffff;
1295
1296    for (int i = 0; i < NUMVIZBUF; i++) {
1297        uint64_t tsi = timeStamp[i];
1298        uint64_t diff = tsi > lastReadTime ? tsi - lastReadTime : lastReadTime - tsi;
1299        if (diff < closestTime) {
1300            closestIdx = i;
1301            closestTime = diff;
1302        }
1303    }
1304
1305
1306    if (closestIdx >= 0) {
1307        //LOGI("@@@ return buffer %d, %d/%d", closestIdx, uint32_t(lastReadTime), uint32_t(timeStamp[closestIdx]));
1308        return mem[closestIdx];
1309    }
1310
1311    // we won't get here, since we either bailed out early, or got a buffer
1312    LOGD("Didn't expect to be here");
1313    return NULL;
1314}
1315
1316static void storeVizBuf(const void *data, int len, uint64_t time) {
1317    // Copy the data in to the visualizer buffer
1318    // Assume a 16 bit stereo source for now.
1319    short *viz = (short*)mem[writeIdx]->pointer();
1320    short *src = (short*)data;
1321    for (int i = 0; i < VIZBUFFRAMES; i++) {
1322        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1323        // This should still be good enough for a visualization
1324        *viz++ = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1325        src += 2;
1326    }
1327    timeStamp[writeIdx++] = time;
1328    if (writeIdx >= NUMVIZBUF) {
1329        writeIdx = 0;
1330    }
1331}
1332
1333static void makeVizBuffers(const char *data, int len, uint64_t time) {
1334
1335    allocVizBufs();
1336
1337    uint64_t startTime = time;
1338    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1339    while (len >= VIZBUFFRAMES * frameSize) {
1340        storeVizBuf(data, len, time);
1341        data += VIZBUFFRAMES * frameSize;
1342        len -= VIZBUFFRAMES * frameSize;
1343        time += 1000 * VIZBUFFRAMES / 44100;
1344    }
1345    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1346}
1347
1348sp<IMemory> MediaPlayerService::snoop()
1349{
1350    sp<MemoryBase> mem = getVizBuffer();
1351    return mem;
1352}
1353
1354
1355#undef LOG_TAG
1356#define LOG_TAG "AudioSink"
1357MediaPlayerService::AudioOutput::AudioOutput()
1358    : mCallback(NULL),
1359      mCallbackCookie(NULL) {
1360    mTrack = 0;
1361    mStreamType = AudioSystem::MUSIC;
1362    mLeftVolume = 1.0;
1363    mRightVolume = 1.0;
1364    mLatency = 0;
1365    mMsecsPerFrame = 0;
1366    mNumFramesWritten = 0;
1367    setMinBufferCount();
1368}
1369
1370MediaPlayerService::AudioOutput::~AudioOutput()
1371{
1372    close();
1373}
1374
1375void MediaPlayerService::AudioOutput::setMinBufferCount()
1376{
1377    char value[PROPERTY_VALUE_MAX];
1378    if (property_get("ro.kernel.qemu", value, 0)) {
1379        mIsOnEmulator = true;
1380        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1381    }
1382}
1383
1384bool MediaPlayerService::AudioOutput::isOnEmulator()
1385{
1386    setMinBufferCount();
1387    return mIsOnEmulator;
1388}
1389
1390int MediaPlayerService::AudioOutput::getMinBufferCount()
1391{
1392    setMinBufferCount();
1393    return mMinBufferCount;
1394}
1395
1396ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1397{
1398    if (mTrack == 0) return NO_INIT;
1399    return mTrack->frameCount() * frameSize();
1400}
1401
1402ssize_t MediaPlayerService::AudioOutput::frameCount() const
1403{
1404    if (mTrack == 0) return NO_INIT;
1405    return mTrack->frameCount();
1406}
1407
1408ssize_t MediaPlayerService::AudioOutput::channelCount() const
1409{
1410    if (mTrack == 0) return NO_INIT;
1411    return mTrack->channelCount();
1412}
1413
1414ssize_t MediaPlayerService::AudioOutput::frameSize() const
1415{
1416    if (mTrack == 0) return NO_INIT;
1417    return mTrack->frameSize();
1418}
1419
1420uint32_t MediaPlayerService::AudioOutput::latency () const
1421{
1422    return mLatency;
1423}
1424
1425float MediaPlayerService::AudioOutput::msecsPerFrame() const
1426{
1427    return mMsecsPerFrame;
1428}
1429
1430status_t MediaPlayerService::AudioOutput::open(
1431        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1432        AudioCallback cb, void *cookie)
1433{
1434    mCallback = cb;
1435    mCallbackCookie = cookie;
1436
1437    // Check argument "bufferCount" against the mininum buffer count
1438    if (bufferCount < mMinBufferCount) {
1439        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1440        bufferCount = mMinBufferCount;
1441
1442    }
1443    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1444    if (mTrack) close();
1445    int afSampleRate;
1446    int afFrameCount;
1447    int frameCount;
1448
1449    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1450        return NO_INIT;
1451    }
1452    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1453        return NO_INIT;
1454    }
1455
1456    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1457
1458    AudioTrack *t;
1459    if (mCallback != NULL) {
1460        t = new AudioTrack(
1461                mStreamType,
1462                sampleRate,
1463                format,
1464                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1465                frameCount,
1466                0 /* flags */,
1467                CallbackWrapper,
1468                this);
1469    } else {
1470        t = new AudioTrack(
1471                mStreamType,
1472                sampleRate,
1473                format,
1474                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1475                frameCount);
1476    }
1477
1478    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1479        LOGE("Unable to create audio track");
1480        delete t;
1481        return NO_INIT;
1482    }
1483
1484    LOGV("setVolume");
1485    t->setVolume(mLeftVolume, mRightVolume);
1486    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1487    mLatency = t->latency();
1488    mTrack = t;
1489    return NO_ERROR;
1490}
1491
1492void MediaPlayerService::AudioOutput::start()
1493{
1494    LOGV("start");
1495    if (mTrack) {
1496        mTrack->setVolume(mLeftVolume, mRightVolume);
1497        mTrack->start();
1498        mTrack->getPosition(&mNumFramesWritten);
1499    }
1500}
1501
1502ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1503{
1504    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1505
1506    //LOGV("write(%p, %u)", buffer, size);
1507    if (mTrack) {
1508        // Only make visualization buffers if anyone recently requested visualization data
1509        uint64_t now = uptimeMillis();
1510        if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1511            // Based on the current play counter, the number of frames written and
1512            // the current real time we can calculate the approximate real start
1513            // time of the buffer we're about to write.
1514            uint32_t pos;
1515            mTrack->getPosition(&pos);
1516
1517            // we're writing ahead by this many frames:
1518            int ahead = mNumFramesWritten - pos;
1519            //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1520            // which is this many milliseconds, assuming 44100 Hz:
1521            ahead /= 44;
1522
1523            makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1524            lastWriteTime = now;
1525        }
1526        ssize_t ret = mTrack->write(buffer, size);
1527        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1528        return ret;
1529    }
1530    return NO_INIT;
1531}
1532
1533void MediaPlayerService::AudioOutput::stop()
1534{
1535    LOGV("stop");
1536    if (mTrack) mTrack->stop();
1537    lastWriteTime = 0;
1538}
1539
1540void MediaPlayerService::AudioOutput::flush()
1541{
1542    LOGV("flush");
1543    if (mTrack) mTrack->flush();
1544}
1545
1546void MediaPlayerService::AudioOutput::pause()
1547{
1548    LOGV("pause");
1549    if (mTrack) mTrack->pause();
1550    lastWriteTime = 0;
1551}
1552
1553void MediaPlayerService::AudioOutput::close()
1554{
1555    LOGV("close");
1556    delete mTrack;
1557    mTrack = 0;
1558}
1559
1560void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1561{
1562    LOGV("setVolume(%f, %f)", left, right);
1563    mLeftVolume = left;
1564    mRightVolume = right;
1565    if (mTrack) {
1566        mTrack->setVolume(left, right);
1567    }
1568}
1569
1570// static
1571void MediaPlayerService::AudioOutput::CallbackWrapper(
1572        int event, void *cookie, void *info) {
1573    if (event != AudioTrack::EVENT_MORE_DATA) {
1574        return;
1575    }
1576
1577    AudioOutput *me = (AudioOutput *)cookie;
1578    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1579
1580    (*me->mCallback)(
1581            me, buffer->raw, buffer->size, me->mCallbackCookie);
1582}
1583
1584#undef LOG_TAG
1585#define LOG_TAG "AudioCache"
1586MediaPlayerService::AudioCache::AudioCache(const char* name) :
1587    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1588    mError(NO_ERROR), mCommandComplete(false)
1589{
1590    // create ashmem heap
1591    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1592}
1593
1594uint32_t MediaPlayerService::AudioCache::latency () const
1595{
1596    return 0;
1597}
1598
1599float MediaPlayerService::AudioCache::msecsPerFrame() const
1600{
1601    return mMsecsPerFrame;
1602}
1603
1604status_t MediaPlayerService::AudioCache::open(
1605        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1606        AudioCallback cb, void *cookie)
1607{
1608    if (cb != NULL) {
1609        return UNKNOWN_ERROR;  // TODO: implement this.
1610    }
1611
1612    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1613    if (mHeap->getHeapID() < 0) return NO_INIT;
1614    mSampleRate = sampleRate;
1615    mChannelCount = (uint16_t)channelCount;
1616    mFormat = (uint16_t)format;
1617    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1618    return NO_ERROR;
1619}
1620
1621ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1622{
1623    LOGV("write(%p, %u)", buffer, size);
1624    if ((buffer == 0) || (size == 0)) return size;
1625
1626    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1627    if (p == NULL) return NO_INIT;
1628    p += mSize;
1629    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1630    if (mSize + size > mHeap->getSize()) {
1631        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1632        size = mHeap->getSize() - mSize;
1633    }
1634    memcpy(p, buffer, size);
1635    mSize += size;
1636    return size;
1637}
1638
1639// call with lock held
1640status_t MediaPlayerService::AudioCache::wait()
1641{
1642    Mutex::Autolock lock(mLock);
1643    if (!mCommandComplete) {
1644        mSignal.wait(mLock);
1645    }
1646    mCommandComplete = false;
1647
1648    if (mError == NO_ERROR) {
1649        LOGV("wait - success");
1650    } else {
1651        LOGV("wait - error");
1652    }
1653    return mError;
1654}
1655
1656void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1657{
1658    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1659    AudioCache* p = static_cast<AudioCache*>(cookie);
1660
1661    // ignore buffering messages
1662    if (msg == MEDIA_BUFFERING_UPDATE) return;
1663
1664    // set error condition
1665    if (msg == MEDIA_ERROR) {
1666        LOGE("Error %d, %d occurred", ext1, ext2);
1667        p->mError = ext1;
1668    }
1669
1670    // wake up thread
1671    LOGV("wakeup thread");
1672    p->mCommandComplete = true;
1673    p->mSignal.signal();
1674}
1675
1676} // namespace android
1677