MediaPlayerService.cpp revision 318ad9c1d9d6515026dfc2c021359d27decaa7a1 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18// Proxy for media player implementations
19
20//#define LOG_NDEBUG 0
21#define LOG_TAG "MediaPlayerService"
22#include <utils/Log.h>
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <dirent.h>
27#include <unistd.h>
28
29#include <string.h>
30
31#include <cutils/atomic.h>
32#include <cutils/properties.h> // for property_get
33
34#include <utils/misc.h>
35
36#include <android_runtime/ActivityManager.h>
37
38#include <binder/IPCThreadState.h>
39#include <binder/IServiceManager.h>
40#include <binder/MemoryHeapBase.h>
41#include <binder/MemoryBase.h>
42#include <utils/Errors.h>  // for status_t
43#include <utils/String8.h>
44#include <utils/SystemClock.h>
45#include <utils/Vector.h>
46#include <cutils/properties.h>
47
48#include <media/MediaPlayerInterface.h>
49#include <media/mediarecorder.h>
50#include <media/MediaMetadataRetrieverInterface.h>
51#include <media/Metadata.h>
52#include <media/AudioTrack.h>
53
54#include "MediaRecorderClient.h"
55#include "MediaPlayerService.h"
56#include "MetadataRetrieverClient.h"
57
58#include "MidiFile.h"
59#include "VorbisPlayer.h"
60#include <media/PVPlayer.h>
61#include "TestPlayerStub.h"
62#include "StagefrightPlayer.h"
63
64#include <OMX.h>
65
66/* desktop Linux needs a little help with gettid() */
67#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS)
68#define __KERNEL__
69# include <linux/unistd.h>
70#ifdef _syscall0
71_syscall0(pid_t,gettid)
72#else
73pid_t gettid() { return syscall(__NR_gettid);}
74#endif
75#undef __KERNEL__
76#endif
77
78namespace {
79using android::media::Metadata;
80using android::status_t;
81using android::OK;
82using android::BAD_VALUE;
83using android::NOT_ENOUGH_DATA;
84using android::Parcel;
85
86// Max number of entries in the filter.
87const int kMaxFilterSize = 64;  // I pulled that out of thin air.
88
89// FIXME: Move all the metadata related function in the Metadata.cpp
90
91
92// Unmarshall a filter from a Parcel.
93// Filter format in a parcel:
94//
95//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
96// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
97// |                       number of entries (n)                   |
98// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
99// |                       metadata type 1                         |
100// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
101// |                       metadata type 2                         |
102// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
103//  ....
104// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
105// |                       metadata type n                         |
106// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
107//
108// @param p Parcel that should start with a filter.
109// @param[out] filter On exit contains the list of metadata type to be
110//                    filtered.
111// @param[out] status On exit contains the status code to be returned.
112// @return true if the parcel starts with a valid filter.
113bool unmarshallFilter(const Parcel& p,
114                      Metadata::Filter *filter,
115                      status_t *status)
116{
117    int32_t val;
118    if (p.readInt32(&val) != OK)
119    {
120        LOGE("Failed to read filter's length");
121        *status = NOT_ENOUGH_DATA;
122        return false;
123    }
124
125    if( val > kMaxFilterSize || val < 0)
126    {
127        LOGE("Invalid filter len %d", val);
128        *status = BAD_VALUE;
129        return false;
130    }
131
132    const size_t num = val;
133
134    filter->clear();
135    filter->setCapacity(num);
136
137    size_t size = num * sizeof(Metadata::Type);
138
139
140    if (p.dataAvail() < size)
141    {
142        LOGE("Filter too short expected %d but got %d", size, p.dataAvail());
143        *status = NOT_ENOUGH_DATA;
144        return false;
145    }
146
147    const Metadata::Type *data =
148            static_cast<const Metadata::Type*>(p.readInplace(size));
149
150    if (NULL == data)
151    {
152        LOGE("Filter had no data");
153        *status = BAD_VALUE;
154        return false;
155    }
156
157    // TODO: The stl impl of vector would be more efficient here
158    // because it degenerates into a memcpy on pod types. Try to
159    // replace later or use stl::set.
160    for (size_t i = 0; i < num; ++i)
161    {
162        filter->add(*data);
163        ++data;
164    }
165    *status = OK;
166    return true;
167}
168
169// @param filter Of metadata type.
170// @param val To be searched.
171// @return true if a match was found.
172bool findMetadata(const Metadata::Filter& filter, const int32_t val)
173{
174    // Deal with empty and ANY right away
175    if (filter.isEmpty()) return false;
176    if (filter[0] == Metadata::kAny) return true;
177
178    return filter.indexOf(val) >= 0;
179}
180
181}  // anonymous namespace
182
183
184namespace android {
185
186// TODO: Temp hack until we can register players
187typedef struct {
188    const char *extension;
189    const player_type playertype;
190} extmap;
191extmap FILE_EXTS [] =  {
192        {".mid", SONIVOX_PLAYER},
193        {".midi", SONIVOX_PLAYER},
194        {".smf", SONIVOX_PLAYER},
195        {".xmf", SONIVOX_PLAYER},
196        {".imy", SONIVOX_PLAYER},
197        {".rtttl", SONIVOX_PLAYER},
198        {".rtx", SONIVOX_PLAYER},
199        {".ota", SONIVOX_PLAYER},
200        {".ogg", VORBIS_PLAYER},
201        {".oga", VORBIS_PLAYER},
202};
203
204// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
205/* static */ const uint32_t MediaPlayerService::AudioOutput::kAudioVideoDelayMs = 0;
206/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
207/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
208
209void MediaPlayerService::instantiate() {
210    defaultServiceManager()->addService(
211            String16("media.player"), new MediaPlayerService());
212}
213
214MediaPlayerService::MediaPlayerService()
215{
216    LOGV("MediaPlayerService created");
217    mNextConnId = 1;
218}
219
220MediaPlayerService::~MediaPlayerService()
221{
222    LOGV("MediaPlayerService destroyed");
223}
224
225sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
226{
227#ifndef NO_OPENCORE
228    sp<MediaRecorderClient> recorder = new MediaRecorderClient(pid);
229#else
230    sp<MediaRecorderClient> recorder = NULL;
231#endif
232    LOGV("Create new media recorder client from pid %d", pid);
233    return recorder;
234}
235
236sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
237{
238    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
239    LOGV("Create new media retriever from pid %d", pid);
240    return retriever;
241}
242
243sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
244{
245    int32_t connId = android_atomic_inc(&mNextConnId);
246    sp<Client> c = new Client(this, pid, connId, client);
247    LOGV("Create new client(%d) from pid %d, url=%s, connId=%d", connId, pid, url, connId);
248    if (NO_ERROR != c->setDataSource(url))
249    {
250        c.clear();
251        return c;
252    }
253    wp<Client> w = c;
254    Mutex::Autolock lock(mLock);
255    mClients.add(w);
256    return c;
257}
258
259sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
260        int fd, int64_t offset, int64_t length)
261{
262    int32_t connId = android_atomic_inc(&mNextConnId);
263    sp<Client> c = new Client(this, pid, connId, client);
264    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
265            connId, pid, fd, offset, length);
266    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
267        c.clear();
268    } else {
269        wp<Client> w = c;
270        Mutex::Autolock lock(mLock);
271        mClients.add(w);
272    }
273    ::close(fd);
274    return c;
275}
276
277sp<IOMX> MediaPlayerService::getOMX() {
278    Mutex::Autolock autoLock(mLock);
279
280    if (mOMX.get() == NULL) {
281        mOMX = new OMX;
282    }
283
284    return mOMX;
285}
286
287status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
288{
289    const size_t SIZE = 256;
290    char buffer[SIZE];
291    String8 result;
292
293    result.append(" AudioCache\n");
294    if (mHeap != 0) {
295        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
296                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
297        result.append(buffer);
298    }
299    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
300            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
301    result.append(buffer);
302    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
303            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
304    result.append(buffer);
305    ::write(fd, result.string(), result.size());
306    return NO_ERROR;
307}
308
309status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
310{
311    const size_t SIZE = 256;
312    char buffer[SIZE];
313    String8 result;
314
315    result.append(" AudioOutput\n");
316    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
317            mStreamType, mLeftVolume, mRightVolume);
318    result.append(buffer);
319    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
320            mMsecsPerFrame, mLatency);
321    result.append(buffer);
322    ::write(fd, result.string(), result.size());
323    if (mTrack != 0) {
324        mTrack->dump(fd, args);
325    }
326    return NO_ERROR;
327}
328
329status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
330{
331    const size_t SIZE = 256;
332    char buffer[SIZE];
333    String8 result;
334    result.append(" Client\n");
335    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
336            mPid, mConnId, mStatus, mLoop?"true": "false");
337    result.append(buffer);
338    write(fd, result.string(), result.size());
339    if (mAudioOutput != 0) {
340        mAudioOutput->dump(fd, args);
341    }
342    write(fd, "\n", 1);
343    return NO_ERROR;
344}
345
346static int myTid() {
347#ifdef HAVE_GETTID
348    return gettid();
349#else
350    return getpid();
351#endif
352}
353
354#if defined(__arm__)
355extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
356        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
357extern "C" void free_malloc_leak_info(uint8_t* info);
358
359void memStatus(int fd, const Vector<String16>& args)
360{
361    const size_t SIZE = 256;
362    char buffer[SIZE];
363    String8 result;
364
365    typedef struct {
366        size_t size;
367        size_t dups;
368        intptr_t * backtrace;
369    } AllocEntry;
370
371    uint8_t *info = NULL;
372    size_t overallSize = 0;
373    size_t infoSize = 0;
374    size_t totalMemory = 0;
375    size_t backtraceSize = 0;
376
377    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
378    if (info) {
379        uint8_t *ptr = info;
380        size_t count = overallSize / infoSize;
381
382        snprintf(buffer, SIZE, " Allocation count %i\n", count);
383        result.append(buffer);
384
385        AllocEntry * entries = new AllocEntry[count];
386
387        for (size_t i = 0; i < count; i++) {
388            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
389            AllocEntry *e = &entries[i];
390
391            e->size = *reinterpret_cast<size_t *>(ptr);
392            ptr += sizeof(size_t);
393
394            e->dups = *reinterpret_cast<size_t *>(ptr);
395            ptr += sizeof(size_t);
396
397            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
398            ptr += sizeof(intptr_t) * backtraceSize;
399        }
400
401        // Now we need to sort the entries.  They come sorted by size but
402        // not by stack trace which causes problems using diff.
403        bool moved;
404        do {
405            moved = false;
406            for (size_t i = 0; i < (count - 1); i++) {
407                AllocEntry *e1 = &entries[i];
408                AllocEntry *e2 = &entries[i+1];
409
410                bool swap = e1->size < e2->size;
411                if (e1->size == e2->size) {
412                    for(size_t j = 0; j < backtraceSize; j++) {
413                        if (e1->backtrace[j] == e2->backtrace[j]) {
414                            continue;
415                        }
416                        swap = e1->backtrace[j] < e2->backtrace[j];
417                        break;
418                    }
419                }
420                if (swap) {
421                    AllocEntry t = entries[i];
422                    entries[i] = entries[i+1];
423                    entries[i+1] = t;
424                    moved = true;
425                }
426            }
427        } while (moved);
428
429        for (size_t i = 0; i < count; i++) {
430            AllocEntry *e = &entries[i];
431
432            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
433            result.append(buffer);
434            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
435                if (ct) {
436                    result.append(", ");
437                }
438                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
439                result.append(buffer);
440            }
441            result.append("\n");
442        }
443
444        delete[] entries;
445        free_malloc_leak_info(info);
446    }
447
448    write(fd, result.string(), result.size());
449}
450#endif
451
452status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
453{
454    const size_t SIZE = 256;
455    char buffer[SIZE];
456    String8 result;
457    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
458        snprintf(buffer, SIZE, "Permission Denial: "
459                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
460                IPCThreadState::self()->getCallingPid(),
461                IPCThreadState::self()->getCallingUid());
462        result.append(buffer);
463    } else {
464        Mutex::Autolock lock(mLock);
465        for (int i = 0, n = mClients.size(); i < n; ++i) {
466            sp<Client> c = mClients[i].promote();
467            if (c != 0) c->dump(fd, args);
468        }
469        result.append(" Files opened and/or mapped:\n");
470        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
471        FILE *f = fopen(buffer, "r");
472        if (f) {
473            while (!feof(f)) {
474                fgets(buffer, SIZE, f);
475                if (strstr(buffer, " /sdcard/") ||
476                    strstr(buffer, " /system/sounds/") ||
477                    strstr(buffer, " /system/media/")) {
478                    result.append("  ");
479                    result.append(buffer);
480                }
481            }
482            fclose(f);
483        } else {
484            result.append("couldn't open ");
485            result.append(buffer);
486            result.append("\n");
487        }
488
489        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
490        DIR *d = opendir(buffer);
491        if (d) {
492            struct dirent *ent;
493            while((ent = readdir(d)) != NULL) {
494                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
495                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
496                    struct stat s;
497                    if (lstat(buffer, &s) == 0) {
498                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
499                            char linkto[256];
500                            int len = readlink(buffer, linkto, sizeof(linkto));
501                            if(len > 0) {
502                                if(len > 255) {
503                                    linkto[252] = '.';
504                                    linkto[253] = '.';
505                                    linkto[254] = '.';
506                                    linkto[255] = 0;
507                                } else {
508                                    linkto[len] = 0;
509                                }
510                                if (strstr(linkto, "/sdcard/") == linkto ||
511                                    strstr(linkto, "/system/sounds/") == linkto ||
512                                    strstr(linkto, "/system/media/") == linkto) {
513                                    result.append("  ");
514                                    result.append(buffer);
515                                    result.append(" -> ");
516                                    result.append(linkto);
517                                    result.append("\n");
518                                }
519                            }
520                        } else {
521                            result.append("  unexpected type for ");
522                            result.append(buffer);
523                            result.append("\n");
524                        }
525                    }
526                }
527            }
528            closedir(d);
529        } else {
530            result.append("couldn't open ");
531            result.append(buffer);
532            result.append("\n");
533        }
534
535#if defined(__arm__)
536        bool dumpMem = false;
537        for (size_t i = 0; i < args.size(); i++) {
538            if (args[i] == String16("-m")) {
539                dumpMem = true;
540            }
541        }
542        if (dumpMem) {
543            memStatus(fd, args);
544        }
545#endif
546    }
547    write(fd, result.string(), result.size());
548    return NO_ERROR;
549}
550
551void MediaPlayerService::removeClient(wp<Client> client)
552{
553    Mutex::Autolock lock(mLock);
554    mClients.remove(client);
555}
556
557MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
558        int32_t connId, const sp<IMediaPlayerClient>& client)
559{
560    LOGV("Client(%d) constructor", connId);
561    mPid = pid;
562    mConnId = connId;
563    mService = service;
564    mClient = client;
565    mLoop = false;
566    mStatus = NO_INIT;
567#if CALLBACK_ANTAGONIZER
568    LOGD("create Antagonizer");
569    mAntagonizer = new Antagonizer(notify, this);
570#endif
571}
572
573MediaPlayerService::Client::~Client()
574{
575    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
576    mAudioOutput.clear();
577    wp<Client> client(this);
578    disconnect();
579    mService->removeClient(client);
580}
581
582void MediaPlayerService::Client::disconnect()
583{
584    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
585    // grab local reference and clear main reference to prevent future
586    // access to object
587    sp<MediaPlayerBase> p;
588    {
589        Mutex::Autolock l(mLock);
590        p = mPlayer;
591    }
592    mClient.clear();
593
594    mPlayer.clear();
595
596    // clear the notification to prevent callbacks to dead client
597    // and reset the player. We assume the player will serialize
598    // access to itself if necessary.
599    if (p != 0) {
600        p->setNotifyCallback(0, 0);
601#if CALLBACK_ANTAGONIZER
602        LOGD("kill Antagonizer");
603        mAntagonizer->kill();
604#endif
605        p->reset();
606    }
607
608    IPCThreadState::self()->flushCommands();
609}
610
611static player_type getDefaultPlayerType() {
612#if BUILD_WITH_FULL_STAGEFRIGHT
613    char value[PROPERTY_VALUE_MAX];
614    if (property_get("media.stagefright.enable-player", value, NULL)
615        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
616        return STAGEFRIGHT_PLAYER;
617    }
618#endif
619
620    return PV_PLAYER;
621}
622
623player_type getPlayerType(int fd, int64_t offset, int64_t length)
624{
625    char buf[20];
626    lseek(fd, offset, SEEK_SET);
627    read(fd, buf, sizeof(buf));
628    lseek(fd, offset, SEEK_SET);
629
630    long ident = *((long*)buf);
631
632    // Ogg vorbis?
633    if (ident == 0x5367674f) // 'OggS'
634        return VORBIS_PLAYER;
635
636    // Some kind of MIDI?
637    EAS_DATA_HANDLE easdata;
638    if (EAS_Init(&easdata) == EAS_SUCCESS) {
639        EAS_FILE locator;
640        locator.path = NULL;
641        locator.fd = fd;
642        locator.offset = offset;
643        locator.length = length;
644        EAS_HANDLE  eashandle;
645        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
646            EAS_CloseFile(easdata, eashandle);
647            EAS_Shutdown(easdata);
648            return SONIVOX_PLAYER;
649        }
650        EAS_Shutdown(easdata);
651    }
652
653    return getDefaultPlayerType();
654}
655
656player_type getPlayerType(const char* url)
657{
658    if (TestPlayerStub::canBeUsed(url)) {
659        return TEST_PLAYER;
660    }
661
662    // use MidiFile for MIDI extensions
663    int lenURL = strlen(url);
664    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
665        int len = strlen(FILE_EXTS[i].extension);
666        int start = lenURL - len;
667        if (start > 0) {
668            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
669                return FILE_EXTS[i].playertype;
670            }
671        }
672    }
673
674    return getDefaultPlayerType();
675}
676
677static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
678        notify_callback_f notifyFunc)
679{
680    sp<MediaPlayerBase> p;
681    switch (playerType) {
682#ifndef NO_OPENCORE
683        case PV_PLAYER:
684            LOGV(" create PVPlayer");
685            p = new PVPlayer();
686            break;
687#endif
688        case SONIVOX_PLAYER:
689            LOGV(" create MidiFile");
690            p = new MidiFile();
691            break;
692        case VORBIS_PLAYER:
693            LOGV(" create VorbisPlayer");
694            p = new VorbisPlayer();
695            break;
696#if BUILD_WITH_FULL_STAGEFRIGHT
697        case STAGEFRIGHT_PLAYER:
698            LOGV(" create StagefrightPlayer");
699            p = new StagefrightPlayer;
700            break;
701#endif
702        case TEST_PLAYER:
703            LOGV("Create Test Player stub");
704            p = new TestPlayerStub();
705            break;
706    }
707    if (p != NULL) {
708        if (p->initCheck() == NO_ERROR) {
709            p->setNotifyCallback(cookie, notifyFunc);
710        } else {
711            p.clear();
712        }
713    }
714    if (p == NULL) {
715        LOGE("Failed to create player object");
716    }
717    return p;
718}
719
720sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
721{
722    // determine if we have the right player type
723    sp<MediaPlayerBase> p = mPlayer;
724    if ((p != NULL) && (p->playerType() != playerType)) {
725        LOGV("delete player");
726        p.clear();
727    }
728    if (p == NULL) {
729        p = android::createPlayer(playerType, this, notify);
730    }
731    return p;
732}
733
734status_t MediaPlayerService::Client::setDataSource(const char *url)
735{
736    LOGV("setDataSource(%s)", url);
737    if (url == NULL)
738        return UNKNOWN_ERROR;
739
740    if (strncmp(url, "content://", 10) == 0) {
741        // get a filedescriptor for the content Uri and
742        // pass it to the setDataSource(fd) method
743
744        String16 url16(url);
745        int fd = android::openContentProviderFile(url16);
746        if (fd < 0)
747        {
748            LOGE("Couldn't open fd for %s", url);
749            return UNKNOWN_ERROR;
750        }
751        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
752        close(fd);
753        return mStatus;
754    } else {
755        player_type playerType = getPlayerType(url);
756        LOGV("player type = %d", playerType);
757
758        // create the right type of player
759        sp<MediaPlayerBase> p = createPlayer(playerType);
760        if (p == NULL) return NO_INIT;
761
762        if (!p->hardwareOutput()) {
763            mAudioOutput = new AudioOutput();
764            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
765        }
766
767        // now set data source
768        LOGV(" setDataSource");
769        mStatus = p->setDataSource(url);
770        if (mStatus == NO_ERROR) {
771            mPlayer = p;
772        } else {
773            LOGE("  error: %d", mStatus);
774        }
775        return mStatus;
776    }
777}
778
779status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
780{
781    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
782    struct stat sb;
783    int ret = fstat(fd, &sb);
784    if (ret != 0) {
785        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
786        return UNKNOWN_ERROR;
787    }
788
789    LOGV("st_dev  = %llu", sb.st_dev);
790    LOGV("st_mode = %u", sb.st_mode);
791    LOGV("st_uid  = %lu", sb.st_uid);
792    LOGV("st_gid  = %lu", sb.st_gid);
793    LOGV("st_size = %llu", sb.st_size);
794
795    if (offset >= sb.st_size) {
796        LOGE("offset error");
797        ::close(fd);
798        return UNKNOWN_ERROR;
799    }
800    if (offset + length > sb.st_size) {
801        length = sb.st_size - offset;
802        LOGV("calculated length = %lld", length);
803    }
804
805    player_type playerType = getPlayerType(fd, offset, length);
806    LOGV("player type = %d", playerType);
807
808    // create the right type of player
809    sp<MediaPlayerBase> p = createPlayer(playerType);
810    if (p == NULL) return NO_INIT;
811
812    if (!p->hardwareOutput()) {
813        mAudioOutput = new AudioOutput();
814        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
815    }
816
817    // now set data source
818    mStatus = p->setDataSource(fd, offset, length);
819    if (mStatus == NO_ERROR) mPlayer = p;
820    return mStatus;
821}
822
823status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
824{
825    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
826    sp<MediaPlayerBase> p = getPlayer();
827    if (p == 0) return UNKNOWN_ERROR;
828    return p->setVideoSurface(surface);
829}
830
831status_t MediaPlayerService::Client::invoke(const Parcel& request,
832                                            Parcel *reply)
833{
834    sp<MediaPlayerBase> p = getPlayer();
835    if (p == NULL) return UNKNOWN_ERROR;
836    return p->invoke(request, reply);
837}
838
839// This call doesn't need to access the native player.
840status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
841{
842    status_t status;
843    media::Metadata::Filter allow, drop;
844
845    if (unmarshallFilter(filter, &allow, &status) &&
846        unmarshallFilter(filter, &drop, &status)) {
847        Mutex::Autolock lock(mLock);
848
849        mMetadataAllow = allow;
850        mMetadataDrop = drop;
851    }
852    return status;
853}
854
855status_t MediaPlayerService::Client::getMetadata(
856        bool update_only, bool apply_filter, Parcel *reply)
857{
858    sp<MediaPlayerBase> player = getPlayer();
859    if (player == 0) return UNKNOWN_ERROR;
860
861    status_t status;
862    // Placeholder for the return code, updated by the caller.
863    reply->writeInt32(-1);
864
865    media::Metadata::Filter ids;
866
867    // We don't block notifications while we fetch the data. We clear
868    // mMetadataUpdated first so we don't lose notifications happening
869    // during the rest of this call.
870    {
871        Mutex::Autolock lock(mLock);
872        if (update_only) {
873            ids = mMetadataUpdated;
874        }
875        mMetadataUpdated.clear();
876    }
877
878    media::Metadata metadata(reply);
879
880    metadata.appendHeader();
881    status = player->getMetadata(ids, reply);
882
883    if (status != OK) {
884        metadata.resetParcel();
885        LOGE("getMetadata failed %d", status);
886        return status;
887    }
888
889    // FIXME: Implement filtering on the result. Not critical since
890    // filtering takes place on the update notifications already. This
891    // would be when all the metadata are fetch and a filter is set.
892
893    // Everything is fine, update the metadata length.
894    metadata.updateLength();
895    return OK;
896}
897
898status_t MediaPlayerService::Client::prepareAsync()
899{
900    LOGV("[%d] prepareAsync", mConnId);
901    sp<MediaPlayerBase> p = getPlayer();
902    if (p == 0) return UNKNOWN_ERROR;
903    status_t ret = p->prepareAsync();
904#if CALLBACK_ANTAGONIZER
905    LOGD("start Antagonizer");
906    if (ret == NO_ERROR) mAntagonizer->start();
907#endif
908    return ret;
909}
910
911status_t MediaPlayerService::Client::start()
912{
913    LOGV("[%d] start", mConnId);
914    sp<MediaPlayerBase> p = getPlayer();
915    if (p == 0) return UNKNOWN_ERROR;
916    p->setLooping(mLoop);
917    return p->start();
918}
919
920status_t MediaPlayerService::Client::stop()
921{
922    LOGV("[%d] stop", mConnId);
923    sp<MediaPlayerBase> p = getPlayer();
924    if (p == 0) return UNKNOWN_ERROR;
925    return p->stop();
926}
927
928status_t MediaPlayerService::Client::pause()
929{
930    LOGV("[%d] pause", mConnId);
931    sp<MediaPlayerBase> p = getPlayer();
932    if (p == 0) return UNKNOWN_ERROR;
933    return p->pause();
934}
935
936status_t MediaPlayerService::Client::isPlaying(bool* state)
937{
938    *state = false;
939    sp<MediaPlayerBase> p = getPlayer();
940    if (p == 0) return UNKNOWN_ERROR;
941    *state = p->isPlaying();
942    LOGV("[%d] isPlaying: %d", mConnId, *state);
943    return NO_ERROR;
944}
945
946status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
947{
948    LOGV("getCurrentPosition");
949    sp<MediaPlayerBase> p = getPlayer();
950    if (p == 0) return UNKNOWN_ERROR;
951    status_t ret = p->getCurrentPosition(msec);
952    if (ret == NO_ERROR) {
953        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
954    } else {
955        LOGE("getCurrentPosition returned %d", ret);
956    }
957    return ret;
958}
959
960status_t MediaPlayerService::Client::getDuration(int *msec)
961{
962    LOGV("getDuration");
963    sp<MediaPlayerBase> p = getPlayer();
964    if (p == 0) return UNKNOWN_ERROR;
965    status_t ret = p->getDuration(msec);
966    if (ret == NO_ERROR) {
967        LOGV("[%d] getDuration = %d", mConnId, *msec);
968    } else {
969        LOGE("getDuration returned %d", ret);
970    }
971    return ret;
972}
973
974status_t MediaPlayerService::Client::seekTo(int msec)
975{
976    LOGV("[%d] seekTo(%d)", mConnId, msec);
977    sp<MediaPlayerBase> p = getPlayer();
978    if (p == 0) return UNKNOWN_ERROR;
979    return p->seekTo(msec);
980}
981
982status_t MediaPlayerService::Client::reset()
983{
984    LOGV("[%d] reset", mConnId);
985    sp<MediaPlayerBase> p = getPlayer();
986    if (p == 0) return UNKNOWN_ERROR;
987    return p->reset();
988}
989
990status_t MediaPlayerService::Client::setAudioStreamType(int type)
991{
992    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
993    // TODO: for hardware output, call player instead
994    Mutex::Autolock l(mLock);
995    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
996    return NO_ERROR;
997}
998
999status_t MediaPlayerService::Client::setLooping(int loop)
1000{
1001    LOGV("[%d] setLooping(%d)", mConnId, loop);
1002    mLoop = loop;
1003    sp<MediaPlayerBase> p = getPlayer();
1004    if (p != 0) return p->setLooping(loop);
1005    return NO_ERROR;
1006}
1007
1008status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1009{
1010    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1011    // TODO: for hardware output, call player instead
1012    Mutex::Autolock l(mLock);
1013    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1014    return NO_ERROR;
1015}
1016
1017
1018void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1019{
1020    Client* client = static_cast<Client*>(cookie);
1021
1022    if (MEDIA_INFO == msg &&
1023        MEDIA_INFO_METADATA_UPDATE == ext1) {
1024        const media::Metadata::Type metadata_type = ext2;
1025
1026        if(client->shouldDropMetadata(metadata_type)) {
1027            return;
1028        }
1029
1030        // Update the list of metadata that have changed. getMetadata
1031        // also access mMetadataUpdated and clears it.
1032        client->addNewMetadataUpdate(metadata_type);
1033    }
1034    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1035    client->mClient->notify(msg, ext1, ext2);
1036}
1037
1038
1039bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1040{
1041    Mutex::Autolock lock(mLock);
1042
1043    if (findMetadata(mMetadataDrop, code)) {
1044        return true;
1045    }
1046
1047    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1048        return false;
1049    } else {
1050        return true;
1051    }
1052}
1053
1054
1055void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1056    Mutex::Autolock lock(mLock);
1057    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1058        mMetadataUpdated.add(metadata_type);
1059    }
1060}
1061
1062#if CALLBACK_ANTAGONIZER
1063const int Antagonizer::interval = 10000; // 10 msecs
1064
1065Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1066    mExit(false), mActive(false), mClient(client), mCb(cb)
1067{
1068    createThread(callbackThread, this);
1069}
1070
1071void Antagonizer::kill()
1072{
1073    Mutex::Autolock _l(mLock);
1074    mActive = false;
1075    mExit = true;
1076    mCondition.wait(mLock);
1077}
1078
1079int Antagonizer::callbackThread(void* user)
1080{
1081    LOGD("Antagonizer started");
1082    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1083    while (!p->mExit) {
1084        if (p->mActive) {
1085            LOGV("send event");
1086            p->mCb(p->mClient, 0, 0, 0);
1087        }
1088        usleep(interval);
1089    }
1090    Mutex::Autolock _l(p->mLock);
1091    p->mCondition.signal();
1092    LOGD("Antagonizer stopped");
1093    return 0;
1094}
1095#endif
1096
1097static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1098
1099sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1100{
1101    LOGV("decode(%s)", url);
1102    sp<MemoryBase> mem;
1103    sp<MediaPlayerBase> player;
1104
1105    // Protect our precious, precious DRMd ringtones by only allowing
1106    // decoding of http, but not filesystem paths or content Uris.
1107    // If the application wants to decode those, it should open a
1108    // filedescriptor for them and use that.
1109    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1110        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1111        return mem;
1112    }
1113
1114    player_type playerType = getPlayerType(url);
1115    LOGV("player type = %d", playerType);
1116
1117    // create the right type of player
1118    sp<AudioCache> cache = new AudioCache(url);
1119    player = android::createPlayer(playerType, cache.get(), cache->notify);
1120    if (player == NULL) goto Exit;
1121    if (player->hardwareOutput()) goto Exit;
1122
1123    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1124
1125    // set data source
1126    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1127
1128    LOGV("prepare");
1129    player->prepareAsync();
1130
1131    LOGV("wait for prepare");
1132    if (cache->wait() != NO_ERROR) goto Exit;
1133
1134    LOGV("start");
1135    player->start();
1136
1137    LOGV("wait for playback complete");
1138    if (cache->wait() != NO_ERROR) goto Exit;
1139
1140    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1141    *pSampleRate = cache->sampleRate();
1142    *pNumChannels = cache->channelCount();
1143    *pFormat = cache->format();
1144    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1145
1146Exit:
1147    if (player != 0) player->reset();
1148    return mem;
1149}
1150
1151sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1152{
1153    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1154    sp<MemoryBase> mem;
1155    sp<MediaPlayerBase> player;
1156
1157    player_type playerType = getPlayerType(fd, offset, length);
1158    LOGV("player type = %d", playerType);
1159
1160    // create the right type of player
1161    sp<AudioCache> cache = new AudioCache("decode_fd");
1162    player = android::createPlayer(playerType, cache.get(), cache->notify);
1163    if (player == NULL) goto Exit;
1164    if (player->hardwareOutput()) goto Exit;
1165
1166    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1167
1168    // set data source
1169    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1170
1171    LOGV("prepare");
1172    player->prepareAsync();
1173
1174    LOGV("wait for prepare");
1175    if (cache->wait() != NO_ERROR) goto Exit;
1176
1177    LOGV("start");
1178    player->start();
1179
1180    LOGV("wait for playback complete");
1181    if (cache->wait() != NO_ERROR) goto Exit;
1182
1183    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1184    *pSampleRate = cache->sampleRate();
1185    *pNumChannels = cache->channelCount();
1186    *pFormat = cache->format();
1187    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1188
1189Exit:
1190    if (player != 0) player->reset();
1191    ::close(fd);
1192    return mem;
1193}
1194
1195/*
1196 * Avert your eyes, ugly hack ahead.
1197 * The following is to support music visualizations.
1198 */
1199
1200static const int NUMVIZBUF = 32;
1201static const int VIZBUFFRAMES = 1024;
1202static const int TOTALBUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1203
1204static bool gotMem = false;
1205static sp<MemoryBase> mem[NUMVIZBUF];
1206static uint64_t timeStamp[NUMVIZBUF];
1207static uint64_t lastReadTime;
1208static uint64_t lastWriteTime;
1209static int writeIdx = 0;
1210
1211static void allocVizBufs() {
1212    if (!gotMem) {
1213        for (int i=0;i<NUMVIZBUF;i++) {
1214            sp<MemoryHeapBase> heap = new MemoryHeapBase(VIZBUFFRAMES*2, 0, "snooper");
1215            mem[i] = new MemoryBase(heap, 0, heap->getSize());
1216            timeStamp[i] = 0;
1217        }
1218        gotMem = true;
1219    }
1220}
1221
1222
1223/*
1224 * Get a buffer of audio data that is about to be played.
1225 * We don't synchronize this because in practice the writer
1226 * is ahead of the reader, and even if we did happen to catch
1227 * a buffer while it's being written, it's just a visualization,
1228 * so no harm done.
1229 */
1230static sp<MemoryBase> getVizBuffer() {
1231
1232    allocVizBufs();
1233
1234    lastReadTime = uptimeMillis() + 100; // account for renderer delay (we shouldn't be doing this here)
1235
1236    // if there is no recent buffer (yet), just return empty handed
1237    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1238        //LOGI("@@@@    no audio data to look at yet");
1239        return NULL;
1240    }
1241
1242    char buf[200];
1243
1244    int closestIdx = -1;
1245    uint32_t closestTime = 0x7ffffff;
1246
1247    for (int i = 0; i < NUMVIZBUF; i++) {
1248        uint64_t tsi = timeStamp[i];
1249        uint64_t diff = tsi > lastReadTime ? tsi - lastReadTime : lastReadTime - tsi;
1250        if (diff < closestTime) {
1251            closestIdx = i;
1252            closestTime = diff;
1253        }
1254    }
1255
1256
1257    if (closestIdx >= 0) {
1258        //LOGI("@@@ return buffer %d, %d/%d", closestIdx, uint32_t(lastReadTime), uint32_t(timeStamp[closestIdx]));
1259        return mem[closestIdx];
1260    }
1261
1262    // we won't get here, since we either bailed out early, or got a buffer
1263    LOGD("Didn't expect to be here");
1264    return NULL;
1265}
1266
1267static void storeVizBuf(const void *data, int len, uint64_t time) {
1268    // Copy the data in to the visualizer buffer
1269    // Assume a 16 bit stereo source for now.
1270    short *viz = (short*)mem[writeIdx]->pointer();
1271    short *src = (short*)data;
1272    for (int i = 0; i < VIZBUFFRAMES; i++) {
1273        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1274        // This should still be good enough for a visualization
1275        *viz++ = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1276        src += 2;
1277    }
1278    timeStamp[writeIdx++] = time;
1279    if (writeIdx >= NUMVIZBUF) {
1280        writeIdx = 0;
1281    }
1282}
1283
1284static void makeVizBuffers(const char *data, int len, uint64_t time) {
1285
1286    allocVizBufs();
1287
1288    uint64_t startTime = time;
1289    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1290    while (len >= VIZBUFFRAMES * frameSize) {
1291        storeVizBuf(data, len, time);
1292        data += VIZBUFFRAMES * frameSize;
1293        len -= VIZBUFFRAMES * frameSize;
1294        time += 1000 * VIZBUFFRAMES / 44100;
1295    }
1296    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1297}
1298
1299sp<IMemory> MediaPlayerService::snoop()
1300{
1301    sp<MemoryBase> mem = getVizBuffer();
1302    return mem;
1303}
1304
1305
1306#undef LOG_TAG
1307#define LOG_TAG "AudioSink"
1308MediaPlayerService::AudioOutput::AudioOutput()
1309    : mCallback(NULL),
1310      mCallbackCookie(NULL) {
1311    mTrack = 0;
1312    mStreamType = AudioSystem::MUSIC;
1313    mLeftVolume = 1.0;
1314    mRightVolume = 1.0;
1315    mLatency = 0;
1316    mMsecsPerFrame = 0;
1317    mNumFramesWritten = 0;
1318    setMinBufferCount();
1319}
1320
1321MediaPlayerService::AudioOutput::~AudioOutput()
1322{
1323    close();
1324}
1325
1326void MediaPlayerService::AudioOutput::setMinBufferCount()
1327{
1328    char value[PROPERTY_VALUE_MAX];
1329    if (property_get("ro.kernel.qemu", value, 0)) {
1330        mIsOnEmulator = true;
1331        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1332    }
1333}
1334
1335bool MediaPlayerService::AudioOutput::isOnEmulator()
1336{
1337    setMinBufferCount();
1338    return mIsOnEmulator;
1339}
1340
1341int MediaPlayerService::AudioOutput::getMinBufferCount()
1342{
1343    setMinBufferCount();
1344    return mMinBufferCount;
1345}
1346
1347ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1348{
1349    if (mTrack == 0) return NO_INIT;
1350    return mTrack->frameCount() * frameSize();
1351}
1352
1353ssize_t MediaPlayerService::AudioOutput::frameCount() const
1354{
1355    if (mTrack == 0) return NO_INIT;
1356    return mTrack->frameCount();
1357}
1358
1359ssize_t MediaPlayerService::AudioOutput::channelCount() const
1360{
1361    if (mTrack == 0) return NO_INIT;
1362    return mTrack->channelCount();
1363}
1364
1365ssize_t MediaPlayerService::AudioOutput::frameSize() const
1366{
1367    if (mTrack == 0) return NO_INIT;
1368    return mTrack->frameSize();
1369}
1370
1371uint32_t MediaPlayerService::AudioOutput::latency () const
1372{
1373    return mLatency;
1374}
1375
1376float MediaPlayerService::AudioOutput::msecsPerFrame() const
1377{
1378    return mMsecsPerFrame;
1379}
1380
1381status_t MediaPlayerService::AudioOutput::open(
1382        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1383        AudioCallback cb, void *cookie)
1384{
1385    mCallback = cb;
1386    mCallbackCookie = cookie;
1387
1388    // Check argument "bufferCount" against the mininum buffer count
1389    if (bufferCount < mMinBufferCount) {
1390        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1391        bufferCount = mMinBufferCount;
1392
1393    }
1394    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1395    if (mTrack) close();
1396    int afSampleRate;
1397    int afFrameCount;
1398    int frameCount;
1399
1400    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1401        return NO_INIT;
1402    }
1403    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1404        return NO_INIT;
1405    }
1406
1407    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1408
1409    AudioTrack *t;
1410    if (mCallback != NULL) {
1411        t = new AudioTrack(
1412                mStreamType,
1413                sampleRate,
1414                format,
1415                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1416                frameCount,
1417                0 /* flags */,
1418                CallbackWrapper,
1419                this);
1420    } else {
1421        t = new AudioTrack(
1422                mStreamType,
1423                sampleRate,
1424                format,
1425                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1426                frameCount);
1427    }
1428
1429    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1430        LOGE("Unable to create audio track");
1431        delete t;
1432        return NO_INIT;
1433    }
1434
1435    LOGV("setVolume");
1436    t->setVolume(mLeftVolume, mRightVolume);
1437    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1438    mLatency = t->latency() + kAudioVideoDelayMs;
1439    mTrack = t;
1440    return NO_ERROR;
1441}
1442
1443void MediaPlayerService::AudioOutput::start()
1444{
1445    LOGV("start");
1446    if (mTrack) {
1447        mTrack->setVolume(mLeftVolume, mRightVolume);
1448        mTrack->start();
1449        mTrack->getPosition(&mNumFramesWritten);
1450    }
1451}
1452
1453ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1454{
1455    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1456
1457    //LOGV("write(%p, %u)", buffer, size);
1458    if (mTrack) {
1459        // Only make visualization buffers if anyone recently requested visualization data
1460        uint64_t now = uptimeMillis();
1461        if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1462            // Based on the current play counter, the number of frames written and
1463            // the current real time we can calculate the approximate real start
1464            // time of the buffer we're about to write.
1465            uint32_t pos;
1466            mTrack->getPosition(&pos);
1467
1468            // we're writing ahead by this many frames:
1469            int ahead = mNumFramesWritten - pos;
1470            //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1471            // which is this many milliseconds, assuming 44100 Hz:
1472            ahead /= 44;
1473
1474            makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1475            lastWriteTime = now;
1476        }
1477        ssize_t ret = mTrack->write(buffer, size);
1478        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1479        return ret;
1480    }
1481    return NO_INIT;
1482}
1483
1484void MediaPlayerService::AudioOutput::stop()
1485{
1486    LOGV("stop");
1487    if (mTrack) mTrack->stop();
1488    lastWriteTime = 0;
1489}
1490
1491void MediaPlayerService::AudioOutput::flush()
1492{
1493    LOGV("flush");
1494    if (mTrack) mTrack->flush();
1495}
1496
1497void MediaPlayerService::AudioOutput::pause()
1498{
1499    LOGV("pause");
1500    if (mTrack) mTrack->pause();
1501}
1502
1503void MediaPlayerService::AudioOutput::close()
1504{
1505    LOGV("close");
1506    delete mTrack;
1507    mTrack = 0;
1508}
1509
1510void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1511{
1512    LOGV("setVolume(%f, %f)", left, right);
1513    mLeftVolume = left;
1514    mRightVolume = right;
1515    if (mTrack) {
1516        mTrack->setVolume(left, right);
1517    }
1518}
1519
1520// static
1521void MediaPlayerService::AudioOutput::CallbackWrapper(
1522        int event, void *cookie, void *info) {
1523    if (event != AudioTrack::EVENT_MORE_DATA) {
1524        return;
1525    }
1526
1527    AudioOutput *me = (AudioOutput *)cookie;
1528    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1529
1530    (*me->mCallback)(
1531            me, buffer->raw, buffer->size, me->mCallbackCookie);
1532}
1533
1534#undef LOG_TAG
1535#define LOG_TAG "AudioCache"
1536MediaPlayerService::AudioCache::AudioCache(const char* name) :
1537    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1538    mError(NO_ERROR), mCommandComplete(false)
1539{
1540    // create ashmem heap
1541    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1542}
1543
1544uint32_t MediaPlayerService::AudioCache::latency () const
1545{
1546    return 0;
1547}
1548
1549float MediaPlayerService::AudioCache::msecsPerFrame() const
1550{
1551    return mMsecsPerFrame;
1552}
1553
1554status_t MediaPlayerService::AudioCache::open(
1555        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1556        AudioCallback cb, void *cookie)
1557{
1558    if (cb != NULL) {
1559        return UNKNOWN_ERROR;  // TODO: implement this.
1560    }
1561
1562    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1563    if (mHeap->getHeapID() < 0) return NO_INIT;
1564    mSampleRate = sampleRate;
1565    mChannelCount = (uint16_t)channelCount;
1566    mFormat = (uint16_t)format;
1567    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1568    return NO_ERROR;
1569}
1570
1571ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1572{
1573    LOGV("write(%p, %u)", buffer, size);
1574    if ((buffer == 0) || (size == 0)) return size;
1575
1576    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1577    if (p == NULL) return NO_INIT;
1578    p += mSize;
1579    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1580    if (mSize + size > mHeap->getSize()) {
1581        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1582        size = mHeap->getSize() - mSize;
1583    }
1584    memcpy(p, buffer, size);
1585    mSize += size;
1586    return size;
1587}
1588
1589// call with lock held
1590status_t MediaPlayerService::AudioCache::wait()
1591{
1592    Mutex::Autolock lock(mLock);
1593    if (!mCommandComplete) {
1594        mSignal.wait(mLock);
1595    }
1596    mCommandComplete = false;
1597
1598    if (mError == NO_ERROR) {
1599        LOGV("wait - success");
1600    } else {
1601        LOGV("wait - error");
1602    }
1603    return mError;
1604}
1605
1606void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1607{
1608    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1609    AudioCache* p = static_cast<AudioCache*>(cookie);
1610
1611    // ignore buffering messages
1612    if (msg == MEDIA_BUFFERING_UPDATE) return;
1613
1614    // set error condition
1615    if (msg == MEDIA_ERROR) {
1616        LOGE("Error %d, %d occurred", ext1, ext2);
1617        p->mError = ext1;
1618    }
1619
1620    // wake up thread
1621    LOGV("wakeup thread");
1622    p->mCommandComplete = true;
1623    p->mSignal.signal();
1624}
1625
1626} // namespace android
1627