MediaPlayerService.cpp revision 47945ea184f62def4c5a1dd15164cfa3fd286882 
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    if (!strncasecmp(url, "http://", 7)) {
724        // For now, we're going to use PV for http-based playback,
725        // until we can clear up a few more issues.
726        return PV_PLAYER;
727    }
728
729    return getDefaultPlayerType();
730}
731
732static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
733        notify_callback_f notifyFunc)
734{
735    sp<MediaPlayerBase> p;
736    switch (playerType) {
737#ifndef NO_OPENCORE
738        case PV_PLAYER:
739            LOGV(" create PVPlayer");
740            p = new PVPlayer();
741            break;
742#endif
743        case SONIVOX_PLAYER:
744            LOGV(" create MidiFile");
745            p = new MidiFile();
746            break;
747        case VORBIS_PLAYER:
748            LOGV(" create VorbisPlayer");
749            p = new VorbisPlayer();
750            break;
751#if BUILD_WITH_FULL_STAGEFRIGHT
752        case STAGEFRIGHT_PLAYER:
753            LOGV(" create StagefrightPlayer");
754            p = new StagefrightPlayer;
755            break;
756#endif
757        case TEST_PLAYER:
758            LOGV("Create Test Player stub");
759            p = new TestPlayerStub();
760            break;
761    }
762    if (p != NULL) {
763        if (p->initCheck() == NO_ERROR) {
764            p->setNotifyCallback(cookie, notifyFunc);
765        } else {
766            p.clear();
767        }
768    }
769    if (p == NULL) {
770        LOGE("Failed to create player object");
771    }
772    return p;
773}
774
775sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
776{
777    // determine if we have the right player type
778    sp<MediaPlayerBase> p = mPlayer;
779    if ((p != NULL) && (p->playerType() != playerType)) {
780        LOGV("delete player");
781        p.clear();
782    }
783    if (p == NULL) {
784        p = android::createPlayer(playerType, this, notify);
785    }
786    return p;
787}
788
789status_t MediaPlayerService::Client::setDataSource(const char *url)
790{
791    LOGV("setDataSource(%s)", url);
792    if (url == NULL)
793        return UNKNOWN_ERROR;
794
795    if (strncmp(url, "content://", 10) == 0) {
796        // get a filedescriptor for the content Uri and
797        // pass it to the setDataSource(fd) method
798
799        String16 url16(url);
800        int fd = android::openContentProviderFile(url16);
801        if (fd < 0)
802        {
803            LOGE("Couldn't open fd for %s", url);
804            return UNKNOWN_ERROR;
805        }
806        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
807        close(fd);
808        return mStatus;
809    } else {
810        player_type playerType = getPlayerType(url);
811        LOGV("player type = %d", playerType);
812
813        // create the right type of player
814        sp<MediaPlayerBase> p = createPlayer(playerType);
815        if (p == NULL) return NO_INIT;
816
817        if (!p->hardwareOutput()) {
818            mAudioOutput = new AudioOutput();
819            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
820        }
821
822        // now set data source
823        LOGV(" setDataSource");
824        mStatus = p->setDataSource(url);
825        if (mStatus == NO_ERROR) {
826            mPlayer = p;
827        } else {
828            LOGE("  error: %d", mStatus);
829        }
830        return mStatus;
831    }
832}
833
834status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
835{
836    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
837    struct stat sb;
838    int ret = fstat(fd, &sb);
839    if (ret != 0) {
840        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
841        return UNKNOWN_ERROR;
842    }
843
844    LOGV("st_dev  = %llu", sb.st_dev);
845    LOGV("st_mode = %u", sb.st_mode);
846    LOGV("st_uid  = %lu", sb.st_uid);
847    LOGV("st_gid  = %lu", sb.st_gid);
848    LOGV("st_size = %llu", sb.st_size);
849
850    if (offset >= sb.st_size) {
851        LOGE("offset error");
852        ::close(fd);
853        return UNKNOWN_ERROR;
854    }
855    if (offset + length > sb.st_size) {
856        length = sb.st_size - offset;
857        LOGV("calculated length = %lld", length);
858    }
859
860    player_type playerType = getPlayerType(fd, offset, length);
861    LOGV("player type = %d", playerType);
862
863    // create the right type of player
864    sp<MediaPlayerBase> p = createPlayer(playerType);
865    if (p == NULL) return NO_INIT;
866
867    if (!p->hardwareOutput()) {
868        mAudioOutput = new AudioOutput();
869        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
870    }
871
872    // now set data source
873    mStatus = p->setDataSource(fd, offset, length);
874    if (mStatus == NO_ERROR) mPlayer = p;
875    return mStatus;
876}
877
878status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
879{
880    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
881    sp<MediaPlayerBase> p = getPlayer();
882    if (p == 0) return UNKNOWN_ERROR;
883    return p->setVideoSurface(surface);
884}
885
886status_t MediaPlayerService::Client::invoke(const Parcel& request,
887                                            Parcel *reply)
888{
889    sp<MediaPlayerBase> p = getPlayer();
890    if (p == NULL) return UNKNOWN_ERROR;
891    return p->invoke(request, reply);
892}
893
894// This call doesn't need to access the native player.
895status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
896{
897    status_t status;
898    media::Metadata::Filter allow, drop;
899
900    if (unmarshallFilter(filter, &allow, &status) &&
901        unmarshallFilter(filter, &drop, &status)) {
902        Mutex::Autolock lock(mLock);
903
904        mMetadataAllow = allow;
905        mMetadataDrop = drop;
906    }
907    return status;
908}
909
910status_t MediaPlayerService::Client::getMetadata(
911        bool update_only, bool apply_filter, Parcel *reply)
912{
913    sp<MediaPlayerBase> player = getPlayer();
914    if (player == 0) return UNKNOWN_ERROR;
915
916    status_t status;
917    // Placeholder for the return code, updated by the caller.
918    reply->writeInt32(-1);
919
920    media::Metadata::Filter ids;
921
922    // We don't block notifications while we fetch the data. We clear
923    // mMetadataUpdated first so we don't lose notifications happening
924    // during the rest of this call.
925    {
926        Mutex::Autolock lock(mLock);
927        if (update_only) {
928            ids = mMetadataUpdated;
929        }
930        mMetadataUpdated.clear();
931    }
932
933    media::Metadata metadata(reply);
934
935    metadata.appendHeader();
936    status = player->getMetadata(ids, reply);
937
938    if (status != OK) {
939        metadata.resetParcel();
940        LOGE("getMetadata failed %d", status);
941        return status;
942    }
943
944    // FIXME: Implement filtering on the result. Not critical since
945    // filtering takes place on the update notifications already. This
946    // would be when all the metadata are fetch and a filter is set.
947
948    // Everything is fine, update the metadata length.
949    metadata.updateLength();
950    return OK;
951}
952
953status_t MediaPlayerService::Client::prepareAsync()
954{
955    LOGV("[%d] prepareAsync", mConnId);
956    sp<MediaPlayerBase> p = getPlayer();
957    if (p == 0) return UNKNOWN_ERROR;
958    status_t ret = p->prepareAsync();
959#if CALLBACK_ANTAGONIZER
960    LOGD("start Antagonizer");
961    if (ret == NO_ERROR) mAntagonizer->start();
962#endif
963    return ret;
964}
965
966status_t MediaPlayerService::Client::start()
967{
968    LOGV("[%d] start", mConnId);
969    sp<MediaPlayerBase> p = getPlayer();
970    if (p == 0) return UNKNOWN_ERROR;
971    p->setLooping(mLoop);
972    return p->start();
973}
974
975status_t MediaPlayerService::Client::stop()
976{
977    LOGV("[%d] stop", mConnId);
978    sp<MediaPlayerBase> p = getPlayer();
979    if (p == 0) return UNKNOWN_ERROR;
980    return p->stop();
981}
982
983status_t MediaPlayerService::Client::pause()
984{
985    LOGV("[%d] pause", mConnId);
986    sp<MediaPlayerBase> p = getPlayer();
987    if (p == 0) return UNKNOWN_ERROR;
988    return p->pause();
989}
990
991status_t MediaPlayerService::Client::isPlaying(bool* state)
992{
993    *state = false;
994    sp<MediaPlayerBase> p = getPlayer();
995    if (p == 0) return UNKNOWN_ERROR;
996    *state = p->isPlaying();
997    LOGV("[%d] isPlaying: %d", mConnId, *state);
998    return NO_ERROR;
999}
1000
1001status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1002{
1003    LOGV("getCurrentPosition");
1004    sp<MediaPlayerBase> p = getPlayer();
1005    if (p == 0) return UNKNOWN_ERROR;
1006    status_t ret = p->getCurrentPosition(msec);
1007    if (ret == NO_ERROR) {
1008        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1009    } else {
1010        LOGE("getCurrentPosition returned %d", ret);
1011    }
1012    return ret;
1013}
1014
1015status_t MediaPlayerService::Client::getDuration(int *msec)
1016{
1017    LOGV("getDuration");
1018    sp<MediaPlayerBase> p = getPlayer();
1019    if (p == 0) return UNKNOWN_ERROR;
1020    status_t ret = p->getDuration(msec);
1021    if (ret == NO_ERROR) {
1022        LOGV("[%d] getDuration = %d", mConnId, *msec);
1023    } else {
1024        LOGE("getDuration returned %d", ret);
1025    }
1026    return ret;
1027}
1028
1029status_t MediaPlayerService::Client::seekTo(int msec)
1030{
1031    LOGV("[%d] seekTo(%d)", mConnId, msec);
1032    sp<MediaPlayerBase> p = getPlayer();
1033    if (p == 0) return UNKNOWN_ERROR;
1034    return p->seekTo(msec);
1035}
1036
1037status_t MediaPlayerService::Client::reset()
1038{
1039    LOGV("[%d] reset", mConnId);
1040    sp<MediaPlayerBase> p = getPlayer();
1041    if (p == 0) return UNKNOWN_ERROR;
1042    return p->reset();
1043}
1044
1045status_t MediaPlayerService::Client::setAudioStreamType(int type)
1046{
1047    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1048    // TODO: for hardware output, call player instead
1049    Mutex::Autolock l(mLock);
1050    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1051    return NO_ERROR;
1052}
1053
1054status_t MediaPlayerService::Client::setLooping(int loop)
1055{
1056    LOGV("[%d] setLooping(%d)", mConnId, loop);
1057    mLoop = loop;
1058    sp<MediaPlayerBase> p = getPlayer();
1059    if (p != 0) return p->setLooping(loop);
1060    return NO_ERROR;
1061}
1062
1063status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1064{
1065    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1066    // TODO: for hardware output, call player instead
1067    Mutex::Autolock l(mLock);
1068    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1069    return NO_ERROR;
1070}
1071
1072
1073void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1074{
1075    Client* client = static_cast<Client*>(cookie);
1076
1077    if (MEDIA_INFO == msg &&
1078        MEDIA_INFO_METADATA_UPDATE == ext1) {
1079        const media::Metadata::Type metadata_type = ext2;
1080
1081        if(client->shouldDropMetadata(metadata_type)) {
1082            return;
1083        }
1084
1085        // Update the list of metadata that have changed. getMetadata
1086        // also access mMetadataUpdated and clears it.
1087        client->addNewMetadataUpdate(metadata_type);
1088    }
1089    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1090    client->mClient->notify(msg, ext1, ext2);
1091}
1092
1093
1094bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1095{
1096    Mutex::Autolock lock(mLock);
1097
1098    if (findMetadata(mMetadataDrop, code)) {
1099        return true;
1100    }
1101
1102    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1103        return false;
1104    } else {
1105        return true;
1106    }
1107}
1108
1109
1110void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1111    Mutex::Autolock lock(mLock);
1112    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1113        mMetadataUpdated.add(metadata_type);
1114    }
1115}
1116
1117#if CALLBACK_ANTAGONIZER
1118const int Antagonizer::interval = 10000; // 10 msecs
1119
1120Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1121    mExit(false), mActive(false), mClient(client), mCb(cb)
1122{
1123    createThread(callbackThread, this);
1124}
1125
1126void Antagonizer::kill()
1127{
1128    Mutex::Autolock _l(mLock);
1129    mActive = false;
1130    mExit = true;
1131    mCondition.wait(mLock);
1132}
1133
1134int Antagonizer::callbackThread(void* user)
1135{
1136    LOGD("Antagonizer started");
1137    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1138    while (!p->mExit) {
1139        if (p->mActive) {
1140            LOGV("send event");
1141            p->mCb(p->mClient, 0, 0, 0);
1142        }
1143        usleep(interval);
1144    }
1145    Mutex::Autolock _l(p->mLock);
1146    p->mCondition.signal();
1147    LOGD("Antagonizer stopped");
1148    return 0;
1149}
1150#endif
1151
1152static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1153
1154sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1155{
1156    LOGV("decode(%s)", url);
1157    sp<MemoryBase> mem;
1158    sp<MediaPlayerBase> player;
1159
1160    // Protect our precious, precious DRMd ringtones by only allowing
1161    // decoding of http, but not filesystem paths or content Uris.
1162    // If the application wants to decode those, it should open a
1163    // filedescriptor for them and use that.
1164    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1165        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1166        return mem;
1167    }
1168
1169    player_type playerType = getPlayerType(url);
1170    LOGV("player type = %d", playerType);
1171
1172    // create the right type of player
1173    sp<AudioCache> cache = new AudioCache(url);
1174    player = android::createPlayer(playerType, cache.get(), cache->notify);
1175    if (player == NULL) goto Exit;
1176    if (player->hardwareOutput()) goto Exit;
1177
1178    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1179
1180    // set data source
1181    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1182
1183    LOGV("prepare");
1184    player->prepareAsync();
1185
1186    LOGV("wait for prepare");
1187    if (cache->wait() != NO_ERROR) goto Exit;
1188
1189    LOGV("start");
1190    player->start();
1191
1192    LOGV("wait for playback complete");
1193    if (cache->wait() != NO_ERROR) goto Exit;
1194
1195    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1196    *pSampleRate = cache->sampleRate();
1197    *pNumChannels = cache->channelCount();
1198    *pFormat = cache->format();
1199    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1200
1201Exit:
1202    if (player != 0) player->reset();
1203    return mem;
1204}
1205
1206sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1207{
1208    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1209    sp<MemoryBase> mem;
1210    sp<MediaPlayerBase> player;
1211
1212    player_type playerType = getPlayerType(fd, offset, length);
1213    LOGV("player type = %d", playerType);
1214
1215    // create the right type of player
1216    sp<AudioCache> cache = new AudioCache("decode_fd");
1217    player = android::createPlayer(playerType, cache.get(), cache->notify);
1218    if (player == NULL) goto Exit;
1219    if (player->hardwareOutput()) goto Exit;
1220
1221    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1222
1223    // set data source
1224    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1225
1226    LOGV("prepare");
1227    player->prepareAsync();
1228
1229    LOGV("wait for prepare");
1230    if (cache->wait() != NO_ERROR) goto Exit;
1231
1232    LOGV("start");
1233    player->start();
1234
1235    LOGV("wait for playback complete");
1236    if (cache->wait() != NO_ERROR) goto Exit;
1237
1238    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1239    *pSampleRate = cache->sampleRate();
1240    *pNumChannels = cache->channelCount();
1241    *pFormat = cache->format();
1242    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1243
1244Exit:
1245    if (player != 0) player->reset();
1246    ::close(fd);
1247    return mem;
1248}
1249
1250/*
1251 * Avert your eyes, ugly hack ahead.
1252 * The following is to support music visualizations.
1253 */
1254
1255static const int NUMVIZBUF = 32;
1256static const int VIZBUFFRAMES = 1024;
1257static const int TOTALBUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1258
1259static bool gotMem = false;
1260static sp<MemoryBase> mem[NUMVIZBUF];
1261static uint64_t timeStamp[NUMVIZBUF];
1262static uint64_t lastReadTime;
1263static uint64_t lastWriteTime;
1264static int writeIdx = 0;
1265
1266static void allocVizBufs() {
1267    if (!gotMem) {
1268        for (int i=0;i<NUMVIZBUF;i++) {
1269            sp<MemoryHeapBase> heap = new MemoryHeapBase(VIZBUFFRAMES*2, 0, "snooper");
1270            mem[i] = new MemoryBase(heap, 0, heap->getSize());
1271            timeStamp[i] = 0;
1272        }
1273        gotMem = true;
1274    }
1275}
1276
1277
1278/*
1279 * Get a buffer of audio data that is about to be played.
1280 * We don't synchronize this because in practice the writer
1281 * is ahead of the reader, and even if we did happen to catch
1282 * a buffer while it's being written, it's just a visualization,
1283 * so no harm done.
1284 */
1285static sp<MemoryBase> getVizBuffer() {
1286
1287    allocVizBufs();
1288
1289    lastReadTime = uptimeMillis() + 100; // account for renderer delay (we shouldn't be doing this here)
1290
1291    // if there is no recent buffer (yet), just return empty handed
1292    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1293        //LOGI("@@@@    no audio data to look at yet");
1294        return NULL;
1295    }
1296
1297    char buf[200];
1298
1299    int closestIdx = -1;
1300    uint32_t closestTime = 0x7ffffff;
1301
1302    for (int i = 0; i < NUMVIZBUF; i++) {
1303        uint64_t tsi = timeStamp[i];
1304        uint64_t diff = tsi > lastReadTime ? tsi - lastReadTime : lastReadTime - tsi;
1305        if (diff < closestTime) {
1306            closestIdx = i;
1307            closestTime = diff;
1308        }
1309    }
1310
1311
1312    if (closestIdx >= 0) {
1313        //LOGI("@@@ return buffer %d, %d/%d", closestIdx, uint32_t(lastReadTime), uint32_t(timeStamp[closestIdx]));
1314        return mem[closestIdx];
1315    }
1316
1317    // we won't get here, since we either bailed out early, or got a buffer
1318    LOGD("Didn't expect to be here");
1319    return NULL;
1320}
1321
1322static void storeVizBuf(const void *data, int len, uint64_t time) {
1323    // Copy the data in to the visualizer buffer
1324    // Assume a 16 bit stereo source for now.
1325    short *viz = (short*)mem[writeIdx]->pointer();
1326    short *src = (short*)data;
1327    for (int i = 0; i < VIZBUFFRAMES; i++) {
1328        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1329        // This should still be good enough for a visualization
1330        *viz++ = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1331        src += 2;
1332    }
1333    timeStamp[writeIdx++] = time;
1334    if (writeIdx >= NUMVIZBUF) {
1335        writeIdx = 0;
1336    }
1337}
1338
1339static void makeVizBuffers(const char *data, int len, uint64_t time) {
1340
1341    allocVizBufs();
1342
1343    uint64_t startTime = time;
1344    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1345    while (len >= VIZBUFFRAMES * frameSize) {
1346        storeVizBuf(data, len, time);
1347        data += VIZBUFFRAMES * frameSize;
1348        len -= VIZBUFFRAMES * frameSize;
1349        time += 1000 * VIZBUFFRAMES / 44100;
1350    }
1351    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1352}
1353
1354sp<IMemory> MediaPlayerService::snoop()
1355{
1356    sp<MemoryBase> mem = getVizBuffer();
1357    return mem;
1358}
1359
1360
1361#undef LOG_TAG
1362#define LOG_TAG "AudioSink"
1363MediaPlayerService::AudioOutput::AudioOutput()
1364    : mCallback(NULL),
1365      mCallbackCookie(NULL) {
1366    mTrack = 0;
1367    mStreamType = AudioSystem::MUSIC;
1368    mLeftVolume = 1.0;
1369    mRightVolume = 1.0;
1370    mLatency = 0;
1371    mMsecsPerFrame = 0;
1372    mNumFramesWritten = 0;
1373    setMinBufferCount();
1374}
1375
1376MediaPlayerService::AudioOutput::~AudioOutput()
1377{
1378    close();
1379}
1380
1381void MediaPlayerService::AudioOutput::setMinBufferCount()
1382{
1383    char value[PROPERTY_VALUE_MAX];
1384    if (property_get("ro.kernel.qemu", value, 0)) {
1385        mIsOnEmulator = true;
1386        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1387    }
1388}
1389
1390bool MediaPlayerService::AudioOutput::isOnEmulator()
1391{
1392    setMinBufferCount();
1393    return mIsOnEmulator;
1394}
1395
1396int MediaPlayerService::AudioOutput::getMinBufferCount()
1397{
1398    setMinBufferCount();
1399    return mMinBufferCount;
1400}
1401
1402ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1403{
1404    if (mTrack == 0) return NO_INIT;
1405    return mTrack->frameCount() * frameSize();
1406}
1407
1408ssize_t MediaPlayerService::AudioOutput::frameCount() const
1409{
1410    if (mTrack == 0) return NO_INIT;
1411    return mTrack->frameCount();
1412}
1413
1414ssize_t MediaPlayerService::AudioOutput::channelCount() const
1415{
1416    if (mTrack == 0) return NO_INIT;
1417    return mTrack->channelCount();
1418}
1419
1420ssize_t MediaPlayerService::AudioOutput::frameSize() const
1421{
1422    if (mTrack == 0) return NO_INIT;
1423    return mTrack->frameSize();
1424}
1425
1426uint32_t MediaPlayerService::AudioOutput::latency () const
1427{
1428    return mLatency;
1429}
1430
1431float MediaPlayerService::AudioOutput::msecsPerFrame() const
1432{
1433    return mMsecsPerFrame;
1434}
1435
1436status_t MediaPlayerService::AudioOutput::open(
1437        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1438        AudioCallback cb, void *cookie)
1439{
1440    mCallback = cb;
1441    mCallbackCookie = cookie;
1442
1443    // Check argument "bufferCount" against the mininum buffer count
1444    if (bufferCount < mMinBufferCount) {
1445        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1446        bufferCount = mMinBufferCount;
1447
1448    }
1449    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1450    if (mTrack) close();
1451    int afSampleRate;
1452    int afFrameCount;
1453    int frameCount;
1454
1455    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1456        return NO_INIT;
1457    }
1458    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1459        return NO_INIT;
1460    }
1461
1462    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1463
1464    AudioTrack *t;
1465    if (mCallback != NULL) {
1466        t = new AudioTrack(
1467                mStreamType,
1468                sampleRate,
1469                format,
1470                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1471                frameCount,
1472                0 /* flags */,
1473                CallbackWrapper,
1474                this);
1475    } else {
1476        t = new AudioTrack(
1477                mStreamType,
1478                sampleRate,
1479                format,
1480                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1481                frameCount);
1482    }
1483
1484    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1485        LOGE("Unable to create audio track");
1486        delete t;
1487        return NO_INIT;
1488    }
1489
1490    LOGV("setVolume");
1491    t->setVolume(mLeftVolume, mRightVolume);
1492    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1493    mLatency = t->latency();
1494    mTrack = t;
1495    return NO_ERROR;
1496}
1497
1498void MediaPlayerService::AudioOutput::start()
1499{
1500    LOGV("start");
1501    if (mTrack) {
1502        mTrack->setVolume(mLeftVolume, mRightVolume);
1503        mTrack->start();
1504        mTrack->getPosition(&mNumFramesWritten);
1505    }
1506}
1507
1508ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1509{
1510    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1511
1512    //LOGV("write(%p, %u)", buffer, size);
1513    if (mTrack) {
1514        // Only make visualization buffers if anyone recently requested visualization data
1515        uint64_t now = uptimeMillis();
1516        if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1517            // Based on the current play counter, the number of frames written and
1518            // the current real time we can calculate the approximate real start
1519            // time of the buffer we're about to write.
1520            uint32_t pos;
1521            mTrack->getPosition(&pos);
1522
1523            // we're writing ahead by this many frames:
1524            int ahead = mNumFramesWritten - pos;
1525            //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1526            // which is this many milliseconds, assuming 44100 Hz:
1527            ahead /= 44;
1528
1529            makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1530            lastWriteTime = now;
1531        }
1532        ssize_t ret = mTrack->write(buffer, size);
1533        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1534        return ret;
1535    }
1536    return NO_INIT;
1537}
1538
1539void MediaPlayerService::AudioOutput::stop()
1540{
1541    LOGV("stop");
1542    if (mTrack) mTrack->stop();
1543    lastWriteTime = 0;
1544}
1545
1546void MediaPlayerService::AudioOutput::flush()
1547{
1548    LOGV("flush");
1549    if (mTrack) mTrack->flush();
1550}
1551
1552void MediaPlayerService::AudioOutput::pause()
1553{
1554    LOGV("pause");
1555    if (mTrack) mTrack->pause();
1556    lastWriteTime = 0;
1557}
1558
1559void MediaPlayerService::AudioOutput::close()
1560{
1561    LOGV("close");
1562    delete mTrack;
1563    mTrack = 0;
1564}
1565
1566void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1567{
1568    LOGV("setVolume(%f, %f)", left, right);
1569    mLeftVolume = left;
1570    mRightVolume = right;
1571    if (mTrack) {
1572        mTrack->setVolume(left, right);
1573    }
1574}
1575
1576// static
1577void MediaPlayerService::AudioOutput::CallbackWrapper(
1578        int event, void *cookie, void *info) {
1579    if (event != AudioTrack::EVENT_MORE_DATA) {
1580        return;
1581    }
1582
1583    AudioOutput *me = (AudioOutput *)cookie;
1584    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1585
1586    (*me->mCallback)(
1587            me, buffer->raw, buffer->size, me->mCallbackCookie);
1588}
1589
1590#undef LOG_TAG
1591#define LOG_TAG "AudioCache"
1592MediaPlayerService::AudioCache::AudioCache(const char* name) :
1593    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1594    mError(NO_ERROR), mCommandComplete(false)
1595{
1596    // create ashmem heap
1597    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1598}
1599
1600uint32_t MediaPlayerService::AudioCache::latency () const
1601{
1602    return 0;
1603}
1604
1605float MediaPlayerService::AudioCache::msecsPerFrame() const
1606{
1607    return mMsecsPerFrame;
1608}
1609
1610status_t MediaPlayerService::AudioCache::open(
1611        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1612        AudioCallback cb, void *cookie)
1613{
1614    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1615    if (cb != NULL) {
1616        return UNKNOWN_ERROR;  // TODO: implement this.
1617    }
1618    if (mHeap->getHeapID() < 0) {
1619        return NO_INIT;
1620    }
1621
1622    mSampleRate = sampleRate;
1623    mChannelCount = (uint16_t)channelCount;
1624    mFormat = (uint16_t)format;
1625    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1626    return NO_ERROR;
1627}
1628
1629ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1630{
1631    LOGV("write(%p, %u)", buffer, size);
1632    if ((buffer == 0) || (size == 0)) return size;
1633
1634    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1635    if (p == NULL) return NO_INIT;
1636    p += mSize;
1637    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1638    if (mSize + size > mHeap->getSize()) {
1639        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1640        size = mHeap->getSize() - mSize;
1641    }
1642    memcpy(p, buffer, size);
1643    mSize += size;
1644    return size;
1645}
1646
1647// call with lock held
1648status_t MediaPlayerService::AudioCache::wait()
1649{
1650    Mutex::Autolock lock(mLock);
1651    if (!mCommandComplete) {
1652        mSignal.wait(mLock);
1653    }
1654    mCommandComplete = false;
1655
1656    if (mError == NO_ERROR) {
1657        LOGV("wait - success");
1658    } else {
1659        LOGV("wait - error");
1660    }
1661    return mError;
1662}
1663
1664void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1665{
1666    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1667    AudioCache* p = static_cast<AudioCache*>(cookie);
1668
1669    // ignore buffering messages
1670    switch (msg)
1671    {
1672    case MEDIA_ERROR:
1673        LOGE("Error %d, %d occurred", ext1, ext2);
1674        p->mError = ext1;
1675        break;
1676    case MEDIA_PREPARED:
1677        LOGV("prepared");
1678        break;
1679    case MEDIA_PLAYBACK_COMPLETE:
1680        LOGV("playback complete");
1681        break;
1682    default:
1683        LOGV("ignored");
1684        return;
1685    }
1686
1687    // wake up thread
1688    p->mCommandComplete = true;
1689    p->mSignal.signal();
1690}
1691
1692} // namespace android
1693