MediaPlayerService.cpp revision 8f0e4aace6c0643f7c4005184c7df2c73368f0dc 
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/Vector.h>
45#include <cutils/properties.h>
46
47#include <media/MediaPlayerInterface.h>
48#include <media/mediarecorder.h>
49#include <media/MediaMetadataRetrieverInterface.h>
50#include <media/Metadata.h>
51#include <media/AudioTrack.h>
52
53#include "MediaRecorderClient.h"
54#include "MediaPlayerService.h"
55#include "MetadataRetrieverClient.h"
56
57#include "MidiFile.h"
58#include "VorbisPlayer.h"
59#include <media/PVPlayer.h>
60#include "TestPlayerStub.h"
61#include "StagefrightPlayer.h"
62
63#include <OMX.h>
64
65/* desktop Linux needs a little help with gettid() */
66#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS)
67#define __KERNEL__
68# include <linux/unistd.h>
69#ifdef _syscall0
70_syscall0(pid_t,gettid)
71#else
72pid_t gettid() { return syscall(__NR_gettid);}
73#endif
74#undef __KERNEL__
75#endif
76
77namespace {
78using android::media::Metadata;
79using android::status_t;
80using android::OK;
81using android::BAD_VALUE;
82using android::NOT_ENOUGH_DATA;
83using android::Parcel;
84
85// Max number of entries in the filter.
86const int kMaxFilterSize = 64;  // I pulled that out of thin air.
87
88// FIXME: Move all the metadata related function in the Metadata.cpp
89
90
91// Unmarshall a filter from a Parcel.
92// Filter format in a parcel:
93//
94//  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
95// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
96// |                       number of entries (n)                   |
97// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
98// |                       metadata type 1                         |
99// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
100// |                       metadata type 2                         |
101// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
102//  ....
103// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
104// |                       metadata type n                         |
105// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
106//
107// @param p Parcel that should start with a filter.
108// @param[out] filter On exit contains the list of metadata type to be
109//                    filtered.
110// @param[out] status On exit contains the status code to be returned.
111// @return true if the parcel starts with a valid filter.
112bool unmarshallFilter(const Parcel& p,
113                      Metadata::Filter *filter,
114                      status_t *status)
115{
116    int32_t val;
117    if (p.readInt32(&val) != OK)
118    {
119        LOGE("Failed to read filter's length");
120        *status = NOT_ENOUGH_DATA;
121        return false;
122    }
123
124    if( val > kMaxFilterSize || val < 0)
125    {
126        LOGE("Invalid filter len %d", val);
127        *status = BAD_VALUE;
128        return false;
129    }
130
131    const size_t num = val;
132
133    filter->clear();
134    filter->setCapacity(num);
135
136    size_t size = num * sizeof(Metadata::Type);
137
138
139    if (p.dataAvail() < size)
140    {
141        LOGE("Filter too short expected %d but got %d", size, p.dataAvail());
142        *status = NOT_ENOUGH_DATA;
143        return false;
144    }
145
146    const Metadata::Type *data =
147            static_cast<const Metadata::Type*>(p.readInplace(size));
148
149    if (NULL == data)
150    {
151        LOGE("Filter had no data");
152        *status = BAD_VALUE;
153        return false;
154    }
155
156    // TODO: The stl impl of vector would be more efficient here
157    // because it degenerates into a memcpy on pod types. Try to
158    // replace later or use stl::set.
159    for (size_t i = 0; i < num; ++i)
160    {
161        filter->add(*data);
162        ++data;
163    }
164    *status = OK;
165    return true;
166}
167
168// @param filter Of metadata type.
169// @param val To be searched.
170// @return true if a match was found.
171bool findMetadata(const Metadata::Filter& filter, const int32_t val)
172{
173    // Deal with empty and ANY right away
174    if (filter.isEmpty()) return false;
175    if (filter[0] == Metadata::kAny) return true;
176
177    return filter.indexOf(val) >= 0;
178}
179
180}  // anonymous namespace
181
182
183namespace android {
184
185// TODO: Temp hack until we can register players
186typedef struct {
187    const char *extension;
188    const player_type playertype;
189} extmap;
190extmap FILE_EXTS [] =  {
191        {".mid", SONIVOX_PLAYER},
192        {".midi", SONIVOX_PLAYER},
193        {".smf", SONIVOX_PLAYER},
194        {".xmf", SONIVOX_PLAYER},
195        {".imy", SONIVOX_PLAYER},
196        {".rtttl", SONIVOX_PLAYER},
197        {".rtx", SONIVOX_PLAYER},
198        {".ota", SONIVOX_PLAYER},
199        {".ogg", VORBIS_PLAYER},
200        {".oga", VORBIS_PLAYER},
201};
202
203// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
204/* static */ const uint32_t MediaPlayerService::AudioOutput::kAudioVideoDelayMs = 96;
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(pid);
228#else
229    sp<MediaRecorderClient> recorder = NULL;
230#endif
231    LOGV("Create new media recorder client from pid %d", pid);
232    return recorder;
233}
234
235sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
236{
237    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
238    LOGV("Create new media retriever from pid %d", pid);
239    return retriever;
240}
241
242sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
243{
244    int32_t connId = android_atomic_inc(&mNextConnId);
245    sp<Client> c = new Client(this, pid, connId, client);
246    LOGV("Create new client(%d) from pid %d, url=%s, connId=%d", connId, pid, url, connId);
247    if (NO_ERROR != c->setDataSource(url))
248    {
249        c.clear();
250        return c;
251    }
252    wp<Client> w = c;
253    Mutex::Autolock lock(mLock);
254    mClients.add(w);
255    return c;
256}
257
258sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
259        int fd, int64_t offset, int64_t length)
260{
261    int32_t connId = android_atomic_inc(&mNextConnId);
262    sp<Client> c = new Client(this, pid, connId, client);
263    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
264            connId, pid, fd, offset, length);
265    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
266        c.clear();
267    } else {
268        wp<Client> w = c;
269        Mutex::Autolock lock(mLock);
270        mClients.add(w);
271    }
272    ::close(fd);
273    return c;
274}
275
276sp<IOMX> MediaPlayerService::createOMX() {
277    return new OMX;
278}
279
280status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
281{
282    const size_t SIZE = 256;
283    char buffer[SIZE];
284    String8 result;
285
286    result.append(" AudioCache\n");
287    if (mHeap != 0) {
288        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
289                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
290        result.append(buffer);
291    }
292    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
293            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
294    result.append(buffer);
295    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
296            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
297    result.append(buffer);
298    ::write(fd, result.string(), result.size());
299    return NO_ERROR;
300}
301
302status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
303{
304    const size_t SIZE = 256;
305    char buffer[SIZE];
306    String8 result;
307
308    result.append(" AudioOutput\n");
309    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
310            mStreamType, mLeftVolume, mRightVolume);
311    result.append(buffer);
312    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
313            mMsecsPerFrame, mLatency);
314    result.append(buffer);
315    ::write(fd, result.string(), result.size());
316    if (mTrack != 0) {
317        mTrack->dump(fd, args);
318    }
319    return NO_ERROR;
320}
321
322status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
323{
324    const size_t SIZE = 256;
325    char buffer[SIZE];
326    String8 result;
327    result.append(" Client\n");
328    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
329            mPid, mConnId, mStatus, mLoop?"true": "false");
330    result.append(buffer);
331    write(fd, result.string(), result.size());
332    if (mAudioOutput != 0) {
333        mAudioOutput->dump(fd, args);
334    }
335    write(fd, "\n", 1);
336    return NO_ERROR;
337}
338
339static int myTid() {
340#ifdef HAVE_GETTID
341    return gettid();
342#else
343    return getpid();
344#endif
345}
346
347#if defined(__arm__)
348extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
349        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
350extern "C" void free_malloc_leak_info(uint8_t* info);
351
352void memStatus(int fd, const Vector<String16>& args)
353{
354    const size_t SIZE = 256;
355    char buffer[SIZE];
356    String8 result;
357
358    typedef struct {
359        size_t size;
360        size_t dups;
361        intptr_t * backtrace;
362    } AllocEntry;
363
364    uint8_t *info = NULL;
365    size_t overallSize = 0;
366    size_t infoSize = 0;
367    size_t totalMemory = 0;
368    size_t backtraceSize = 0;
369
370    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
371    if (info) {
372        uint8_t *ptr = info;
373        size_t count = overallSize / infoSize;
374
375        snprintf(buffer, SIZE, " Allocation count %i\n", count);
376        result.append(buffer);
377
378        AllocEntry * entries = new AllocEntry[count];
379
380        for (size_t i = 0; i < count; i++) {
381            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
382            AllocEntry *e = &entries[i];
383
384            e->size = *reinterpret_cast<size_t *>(ptr);
385            ptr += sizeof(size_t);
386
387            e->dups = *reinterpret_cast<size_t *>(ptr);
388            ptr += sizeof(size_t);
389
390            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
391            ptr += sizeof(intptr_t) * backtraceSize;
392        }
393
394        // Now we need to sort the entries.  They come sorted by size but
395        // not by stack trace which causes problems using diff.
396        bool moved;
397        do {
398            moved = false;
399            for (size_t i = 0; i < (count - 1); i++) {
400                AllocEntry *e1 = &entries[i];
401                AllocEntry *e2 = &entries[i+1];
402
403                bool swap = e1->size < e2->size;
404                if (e1->size == e2->size) {
405                    for(size_t j = 0; j < backtraceSize; j++) {
406                        if (e1->backtrace[j] == e2->backtrace[j]) {
407                            continue;
408                        }
409                        swap = e1->backtrace[j] < e2->backtrace[j];
410                        break;
411                    }
412                }
413                if (swap) {
414                    AllocEntry t = entries[i];
415                    entries[i] = entries[i+1];
416                    entries[i+1] = t;
417                    moved = true;
418                }
419            }
420        } while (moved);
421
422        for (size_t i = 0; i < count; i++) {
423            AllocEntry *e = &entries[i];
424
425            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
426            result.append(buffer);
427            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
428                if (ct) {
429                    result.append(", ");
430                }
431                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
432                result.append(buffer);
433            }
434            result.append("\n");
435        }
436
437        delete[] entries;
438        free_malloc_leak_info(info);
439    }
440
441    write(fd, result.string(), result.size());
442}
443#endif
444
445status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
446{
447    const size_t SIZE = 256;
448    char buffer[SIZE];
449    String8 result;
450    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
451        snprintf(buffer, SIZE, "Permission Denial: "
452                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
453                IPCThreadState::self()->getCallingPid(),
454                IPCThreadState::self()->getCallingUid());
455        result.append(buffer);
456    } else {
457        Mutex::Autolock lock(mLock);
458        for (int i = 0, n = mClients.size(); i < n; ++i) {
459            sp<Client> c = mClients[i].promote();
460            if (c != 0) c->dump(fd, args);
461        }
462        result.append(" Files opened and/or mapped:\n");
463        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
464        FILE *f = fopen(buffer, "r");
465        if (f) {
466            while (!feof(f)) {
467                fgets(buffer, SIZE, f);
468                if (strstr(buffer, " /sdcard/") ||
469                    strstr(buffer, " /system/sounds/") ||
470                    strstr(buffer, " /system/media/")) {
471                    result.append("  ");
472                    result.append(buffer);
473                }
474            }
475            fclose(f);
476        } else {
477            result.append("couldn't open ");
478            result.append(buffer);
479            result.append("\n");
480        }
481
482        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
483        DIR *d = opendir(buffer);
484        if (d) {
485            struct dirent *ent;
486            while((ent = readdir(d)) != NULL) {
487                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
488                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
489                    struct stat s;
490                    if (lstat(buffer, &s) == 0) {
491                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
492                            char linkto[256];
493                            int len = readlink(buffer, linkto, sizeof(linkto));
494                            if(len > 0) {
495                                if(len > 255) {
496                                    linkto[252] = '.';
497                                    linkto[253] = '.';
498                                    linkto[254] = '.';
499                                    linkto[255] = 0;
500                                } else {
501                                    linkto[len] = 0;
502                                }
503                                if (strstr(linkto, "/sdcard/") == linkto ||
504                                    strstr(linkto, "/system/sounds/") == linkto ||
505                                    strstr(linkto, "/system/media/") == linkto) {
506                                    result.append("  ");
507                                    result.append(buffer);
508                                    result.append(" -> ");
509                                    result.append(linkto);
510                                    result.append("\n");
511                                }
512                            }
513                        } else {
514                            result.append("  unexpected type for ");
515                            result.append(buffer);
516                            result.append("\n");
517                        }
518                    }
519                }
520            }
521            closedir(d);
522        } else {
523            result.append("couldn't open ");
524            result.append(buffer);
525            result.append("\n");
526        }
527
528#if defined(__arm__)
529        bool dumpMem = false;
530        for (size_t i = 0; i < args.size(); i++) {
531            if (args[i] == String16("-m")) {
532                dumpMem = true;
533            }
534        }
535        if (dumpMem) {
536            memStatus(fd, args);
537        }
538#endif
539    }
540    write(fd, result.string(), result.size());
541    return NO_ERROR;
542}
543
544void MediaPlayerService::removeClient(wp<Client> client)
545{
546    Mutex::Autolock lock(mLock);
547    mClients.remove(client);
548}
549
550MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
551        int32_t connId, const sp<IMediaPlayerClient>& client)
552{
553    LOGV("Client(%d) constructor", connId);
554    mPid = pid;
555    mConnId = connId;
556    mService = service;
557    mClient = client;
558    mLoop = false;
559    mStatus = NO_INIT;
560#if CALLBACK_ANTAGONIZER
561    LOGD("create Antagonizer");
562    mAntagonizer = new Antagonizer(notify, this);
563#endif
564}
565
566MediaPlayerService::Client::~Client()
567{
568    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
569    mAudioOutput.clear();
570    wp<Client> client(this);
571    disconnect();
572    mService->removeClient(client);
573}
574
575void MediaPlayerService::Client::disconnect()
576{
577    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
578    // grab local reference and clear main reference to prevent future
579    // access to object
580    sp<MediaPlayerBase> p;
581    {
582        Mutex::Autolock l(mLock);
583        p = mPlayer;
584    }
585    mClient.clear();
586
587    mPlayer.clear();
588
589    // clear the notification to prevent callbacks to dead client
590    // and reset the player. We assume the player will serialize
591    // access to itself if necessary.
592    if (p != 0) {
593        p->setNotifyCallback(0, 0);
594#if CALLBACK_ANTAGONIZER
595        LOGD("kill Antagonizer");
596        mAntagonizer->kill();
597#endif
598        p->reset();
599    }
600
601    IPCThreadState::self()->flushCommands();
602}
603
604static player_type getDefaultPlayerType() {
605#if BUILD_WITH_FULL_STAGEFRIGHT
606    char value[PROPERTY_VALUE_MAX];
607    if (property_get("media.stagefright.enable-player", value, NULL)
608        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
609        return STAGEFRIGHT_PLAYER;
610    }
611#endif
612
613    return PV_PLAYER;
614}
615
616player_type getPlayerType(int fd, int64_t offset, int64_t length)
617{
618    char buf[20];
619    lseek(fd, offset, SEEK_SET);
620    read(fd, buf, sizeof(buf));
621    lseek(fd, offset, SEEK_SET);
622
623    long ident = *((long*)buf);
624
625    // Ogg vorbis?
626    if (ident == 0x5367674f) // 'OggS'
627        return VORBIS_PLAYER;
628
629    // Some kind of MIDI?
630    EAS_DATA_HANDLE easdata;
631    if (EAS_Init(&easdata) == EAS_SUCCESS) {
632        EAS_FILE locator;
633        locator.path = NULL;
634        locator.fd = fd;
635        locator.offset = offset;
636        locator.length = length;
637        EAS_HANDLE  eashandle;
638        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
639            EAS_CloseFile(easdata, eashandle);
640            EAS_Shutdown(easdata);
641            return SONIVOX_PLAYER;
642        }
643        EAS_Shutdown(easdata);
644    }
645
646    return getDefaultPlayerType();
647}
648
649player_type getPlayerType(const char* url)
650{
651    if (TestPlayerStub::canBeUsed(url)) {
652        return TEST_PLAYER;
653    }
654
655    // use MidiFile for MIDI extensions
656    int lenURL = strlen(url);
657    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
658        int len = strlen(FILE_EXTS[i].extension);
659        int start = lenURL - len;
660        if (start > 0) {
661            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
662                return FILE_EXTS[i].playertype;
663            }
664        }
665    }
666
667    return getDefaultPlayerType();
668}
669
670static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
671        notify_callback_f notifyFunc)
672{
673    sp<MediaPlayerBase> p;
674    switch (playerType) {
675#ifndef NO_OPENCORE
676        case PV_PLAYER:
677            LOGV(" create PVPlayer");
678            p = new PVPlayer();
679            break;
680#endif
681        case SONIVOX_PLAYER:
682            LOGV(" create MidiFile");
683            p = new MidiFile();
684            break;
685        case VORBIS_PLAYER:
686            LOGV(" create VorbisPlayer");
687            p = new VorbisPlayer();
688            break;
689#if BUILD_WITH_FULL_STAGEFRIGHT
690        case STAGEFRIGHT_PLAYER:
691            LOGV(" create StagefrightPlayer");
692            p = new StagefrightPlayer;
693            break;
694#endif
695        case TEST_PLAYER:
696            LOGV("Create Test Player stub");
697            p = new TestPlayerStub();
698            break;
699    }
700    if (p != NULL) {
701        if (p->initCheck() == NO_ERROR) {
702            p->setNotifyCallback(cookie, notifyFunc);
703        } else {
704            p.clear();
705        }
706    }
707    if (p == NULL) {
708        LOGE("Failed to create player object");
709    }
710    return p;
711}
712
713sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
714{
715    // determine if we have the right player type
716    sp<MediaPlayerBase> p = mPlayer;
717    if ((p != NULL) && (p->playerType() != playerType)) {
718        LOGV("delete player");
719        p.clear();
720    }
721    if (p == NULL) {
722        p = android::createPlayer(playerType, this, notify);
723    }
724    return p;
725}
726
727status_t MediaPlayerService::Client::setDataSource(const char *url)
728{
729    LOGV("setDataSource(%s)", url);
730    if (url == NULL)
731        return UNKNOWN_ERROR;
732
733    if (strncmp(url, "content://", 10) == 0) {
734        // get a filedescriptor for the content Uri and
735        // pass it to the setDataSource(fd) method
736
737        String16 url16(url);
738        int fd = android::openContentProviderFile(url16);
739        if (fd < 0)
740        {
741            LOGE("Couldn't open fd for %s", url);
742            return UNKNOWN_ERROR;
743        }
744        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
745        close(fd);
746        return mStatus;
747    } else {
748        player_type playerType = getPlayerType(url);
749        LOGV("player type = %d", playerType);
750
751        // create the right type of player
752        sp<MediaPlayerBase> p = createPlayer(playerType);
753        if (p == NULL) return NO_INIT;
754
755        if (!p->hardwareOutput()) {
756            mAudioOutput = new AudioOutput();
757            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
758        }
759
760        // now set data source
761        LOGV(" setDataSource");
762        mStatus = p->setDataSource(url);
763        if (mStatus == NO_ERROR) {
764            mPlayer = p;
765        } else {
766            LOGE("  error: %d", mStatus);
767        }
768        return mStatus;
769    }
770}
771
772status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
773{
774    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
775    struct stat sb;
776    int ret = fstat(fd, &sb);
777    if (ret != 0) {
778        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
779        return UNKNOWN_ERROR;
780    }
781
782    LOGV("st_dev  = %llu", sb.st_dev);
783    LOGV("st_mode = %u", sb.st_mode);
784    LOGV("st_uid  = %lu", sb.st_uid);
785    LOGV("st_gid  = %lu", sb.st_gid);
786    LOGV("st_size = %llu", sb.st_size);
787
788    if (offset >= sb.st_size) {
789        LOGE("offset error");
790        ::close(fd);
791        return UNKNOWN_ERROR;
792    }
793    if (offset + length > sb.st_size) {
794        length = sb.st_size - offset;
795        LOGV("calculated length = %lld", length);
796    }
797
798    player_type playerType = getPlayerType(fd, offset, length);
799    LOGV("player type = %d", playerType);
800
801    // create the right type of player
802    sp<MediaPlayerBase> p = createPlayer(playerType);
803    if (p == NULL) return NO_INIT;
804
805    if (!p->hardwareOutput()) {
806        mAudioOutput = new AudioOutput();
807        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
808    }
809
810    // now set data source
811    mStatus = p->setDataSource(fd, offset, length);
812    if (mStatus == NO_ERROR) mPlayer = p;
813    return mStatus;
814}
815
816status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
817{
818    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
819    sp<MediaPlayerBase> p = getPlayer();
820    if (p == 0) return UNKNOWN_ERROR;
821    return p->setVideoSurface(surface);
822}
823
824status_t MediaPlayerService::Client::invoke(const Parcel& request,
825                                            Parcel *reply)
826{
827    sp<MediaPlayerBase> p = getPlayer();
828    if (p == NULL) return UNKNOWN_ERROR;
829    return p->invoke(request, reply);
830}
831
832// This call doesn't need to access the native player.
833status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
834{
835    status_t status;
836    media::Metadata::Filter allow, drop;
837
838    if (unmarshallFilter(filter, &allow, &status) &&
839        unmarshallFilter(filter, &drop, &status)) {
840        Mutex::Autolock lock(mLock);
841
842        mMetadataAllow = allow;
843        mMetadataDrop = drop;
844    }
845    return status;
846}
847
848status_t MediaPlayerService::Client::getMetadata(
849        bool update_only, bool apply_filter, Parcel *reply)
850{
851    sp<MediaPlayerBase> player = getPlayer();
852    if (player == 0) return UNKNOWN_ERROR;
853
854    status_t status;
855    // Placeholder for the return code, updated by the caller.
856    reply->writeInt32(-1);
857
858    media::Metadata::Filter ids;
859
860    // We don't block notifications while we fetch the data. We clear
861    // mMetadataUpdated first so we don't lose notifications happening
862    // during the rest of this call.
863    {
864        Mutex::Autolock lock(mLock);
865        if (update_only) {
866            ids = mMetadataUpdated;
867        }
868        mMetadataUpdated.clear();
869    }
870
871    media::Metadata metadata(reply);
872
873    metadata.appendHeader();
874    status = player->getMetadata(ids, reply);
875
876    if (status != OK) {
877        metadata.resetParcel();
878        LOGE("getMetadata failed %d", status);
879        return status;
880    }
881
882    // FIXME: Implement filtering on the result. Not critical since
883    // filtering takes place on the update notifications already. This
884    // would be when all the metadata are fetch and a filter is set.
885
886    // Everything is fine, update the metadata length.
887    metadata.updateLength();
888    return OK;
889}
890
891status_t MediaPlayerService::Client::prepareAsync()
892{
893    LOGV("[%d] prepareAsync", mConnId);
894    sp<MediaPlayerBase> p = getPlayer();
895    if (p == 0) return UNKNOWN_ERROR;
896    status_t ret = p->prepareAsync();
897#if CALLBACK_ANTAGONIZER
898    LOGD("start Antagonizer");
899    if (ret == NO_ERROR) mAntagonizer->start();
900#endif
901    return ret;
902}
903
904status_t MediaPlayerService::Client::start()
905{
906    LOGV("[%d] start", mConnId);
907    sp<MediaPlayerBase> p = getPlayer();
908    if (p == 0) return UNKNOWN_ERROR;
909    p->setLooping(mLoop);
910    return p->start();
911}
912
913status_t MediaPlayerService::Client::stop()
914{
915    LOGV("[%d] stop", mConnId);
916    sp<MediaPlayerBase> p = getPlayer();
917    if (p == 0) return UNKNOWN_ERROR;
918    return p->stop();
919}
920
921status_t MediaPlayerService::Client::pause()
922{
923    LOGV("[%d] pause", mConnId);
924    sp<MediaPlayerBase> p = getPlayer();
925    if (p == 0) return UNKNOWN_ERROR;
926    return p->pause();
927}
928
929status_t MediaPlayerService::Client::isPlaying(bool* state)
930{
931    *state = false;
932    sp<MediaPlayerBase> p = getPlayer();
933    if (p == 0) return UNKNOWN_ERROR;
934    *state = p->isPlaying();
935    LOGV("[%d] isPlaying: %d", mConnId, *state);
936    return NO_ERROR;
937}
938
939status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
940{
941    LOGV("getCurrentPosition");
942    sp<MediaPlayerBase> p = getPlayer();
943    if (p == 0) return UNKNOWN_ERROR;
944    status_t ret = p->getCurrentPosition(msec);
945    if (ret == NO_ERROR) {
946        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
947    } else {
948        LOGE("getCurrentPosition returned %d", ret);
949    }
950    return ret;
951}
952
953status_t MediaPlayerService::Client::getDuration(int *msec)
954{
955    LOGV("getDuration");
956    sp<MediaPlayerBase> p = getPlayer();
957    if (p == 0) return UNKNOWN_ERROR;
958    status_t ret = p->getDuration(msec);
959    if (ret == NO_ERROR) {
960        LOGV("[%d] getDuration = %d", mConnId, *msec);
961    } else {
962        LOGE("getDuration returned %d", ret);
963    }
964    return ret;
965}
966
967status_t MediaPlayerService::Client::seekTo(int msec)
968{
969    LOGV("[%d] seekTo(%d)", mConnId, msec);
970    sp<MediaPlayerBase> p = getPlayer();
971    if (p == 0) return UNKNOWN_ERROR;
972    return p->seekTo(msec);
973}
974
975status_t MediaPlayerService::Client::reset()
976{
977    LOGV("[%d] reset", mConnId);
978    sp<MediaPlayerBase> p = getPlayer();
979    if (p == 0) return UNKNOWN_ERROR;
980    return p->reset();
981}
982
983status_t MediaPlayerService::Client::setAudioStreamType(int type)
984{
985    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
986    // TODO: for hardware output, call player instead
987    Mutex::Autolock l(mLock);
988    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
989    return NO_ERROR;
990}
991
992status_t MediaPlayerService::Client::setLooping(int loop)
993{
994    LOGV("[%d] setLooping(%d)", mConnId, loop);
995    mLoop = loop;
996    sp<MediaPlayerBase> p = getPlayer();
997    if (p != 0) return p->setLooping(loop);
998    return NO_ERROR;
999}
1000
1001status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1002{
1003    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1004    // TODO: for hardware output, call player instead
1005    Mutex::Autolock l(mLock);
1006    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1007    return NO_ERROR;
1008}
1009
1010
1011void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1012{
1013    Client* client = static_cast<Client*>(cookie);
1014
1015    if (MEDIA_INFO == msg &&
1016        MEDIA_INFO_METADATA_UPDATE == ext1) {
1017        const media::Metadata::Type metadata_type = ext2;
1018
1019        if(client->shouldDropMetadata(metadata_type)) {
1020            return;
1021        }
1022
1023        // Update the list of metadata that have changed. getMetadata
1024        // also access mMetadataUpdated and clears it.
1025        client->addNewMetadataUpdate(metadata_type);
1026    }
1027    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1028    client->mClient->notify(msg, ext1, ext2);
1029}
1030
1031
1032bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1033{
1034    Mutex::Autolock lock(mLock);
1035
1036    if (findMetadata(mMetadataDrop, code)) {
1037        return true;
1038    }
1039
1040    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1041        return false;
1042    } else {
1043        return true;
1044    }
1045}
1046
1047
1048void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1049    Mutex::Autolock lock(mLock);
1050    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1051        mMetadataUpdated.add(metadata_type);
1052    }
1053}
1054
1055#if CALLBACK_ANTAGONIZER
1056const int Antagonizer::interval = 10000; // 10 msecs
1057
1058Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1059    mExit(false), mActive(false), mClient(client), mCb(cb)
1060{
1061    createThread(callbackThread, this);
1062}
1063
1064void Antagonizer::kill()
1065{
1066    Mutex::Autolock _l(mLock);
1067    mActive = false;
1068    mExit = true;
1069    mCondition.wait(mLock);
1070}
1071
1072int Antagonizer::callbackThread(void* user)
1073{
1074    LOGD("Antagonizer started");
1075    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1076    while (!p->mExit) {
1077        if (p->mActive) {
1078            LOGV("send event");
1079            p->mCb(p->mClient, 0, 0, 0);
1080        }
1081        usleep(interval);
1082    }
1083    Mutex::Autolock _l(p->mLock);
1084    p->mCondition.signal();
1085    LOGD("Antagonizer stopped");
1086    return 0;
1087}
1088#endif
1089
1090static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1091
1092sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1093{
1094    LOGV("decode(%s)", url);
1095    sp<MemoryBase> mem;
1096    sp<MediaPlayerBase> player;
1097
1098    // Protect our precious, precious DRMd ringtones by only allowing
1099    // decoding of http, but not filesystem paths or content Uris.
1100    // If the application wants to decode those, it should open a
1101    // filedescriptor for them and use that.
1102    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1103        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1104        return mem;
1105    }
1106
1107    player_type playerType = getPlayerType(url);
1108    LOGV("player type = %d", playerType);
1109
1110    // create the right type of player
1111    sp<AudioCache> cache = new AudioCache(url);
1112    player = android::createPlayer(playerType, cache.get(), cache->notify);
1113    if (player == NULL) goto Exit;
1114    if (player->hardwareOutput()) goto Exit;
1115
1116    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1117
1118    // set data source
1119    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1120
1121    LOGV("prepare");
1122    player->prepareAsync();
1123
1124    LOGV("wait for prepare");
1125    if (cache->wait() != NO_ERROR) goto Exit;
1126
1127    LOGV("start");
1128    player->start();
1129
1130    LOGV("wait for playback complete");
1131    if (cache->wait() != NO_ERROR) goto Exit;
1132
1133    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1134    *pSampleRate = cache->sampleRate();
1135    *pNumChannels = cache->channelCount();
1136    *pFormat = cache->format();
1137    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1138
1139Exit:
1140    if (player != 0) player->reset();
1141    return mem;
1142}
1143
1144sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1145{
1146    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1147    sp<MemoryBase> mem;
1148    sp<MediaPlayerBase> player;
1149
1150    player_type playerType = getPlayerType(fd, offset, length);
1151    LOGV("player type = %d", playerType);
1152
1153    // create the right type of player
1154    sp<AudioCache> cache = new AudioCache("decode_fd");
1155    player = android::createPlayer(playerType, cache.get(), cache->notify);
1156    if (player == NULL) goto Exit;
1157    if (player->hardwareOutput()) goto Exit;
1158
1159    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1160
1161    // set data source
1162    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1163
1164    LOGV("prepare");
1165    player->prepareAsync();
1166
1167    LOGV("wait for prepare");
1168    if (cache->wait() != NO_ERROR) goto Exit;
1169
1170    LOGV("start");
1171    player->start();
1172
1173    LOGV("wait for playback complete");
1174    if (cache->wait() != NO_ERROR) goto Exit;
1175
1176    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1177    *pSampleRate = cache->sampleRate();
1178    *pNumChannels = cache->channelCount();
1179    *pFormat = cache->format();
1180    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1181
1182Exit:
1183    if (player != 0) player->reset();
1184    ::close(fd);
1185    return mem;
1186}
1187
1188#undef LOG_TAG
1189#define LOG_TAG "AudioSink"
1190MediaPlayerService::AudioOutput::AudioOutput()
1191    : mCallback(NULL),
1192      mCallbackCookie(NULL) {
1193    mTrack = 0;
1194    mStreamType = AudioSystem::MUSIC;
1195    mLeftVolume = 1.0;
1196    mRightVolume = 1.0;
1197    mLatency = 0;
1198    mMsecsPerFrame = 0;
1199    setMinBufferCount();
1200}
1201
1202MediaPlayerService::AudioOutput::~AudioOutput()
1203{
1204    close();
1205}
1206
1207void MediaPlayerService::AudioOutput::setMinBufferCount()
1208{
1209    char value[PROPERTY_VALUE_MAX];
1210    if (property_get("ro.kernel.qemu", value, 0)) {
1211        mIsOnEmulator = true;
1212        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1213    }
1214}
1215
1216bool MediaPlayerService::AudioOutput::isOnEmulator()
1217{
1218    setMinBufferCount();
1219    return mIsOnEmulator;
1220}
1221
1222int MediaPlayerService::AudioOutput::getMinBufferCount()
1223{
1224    setMinBufferCount();
1225    return mMinBufferCount;
1226}
1227
1228ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1229{
1230    if (mTrack == 0) return NO_INIT;
1231    return mTrack->frameCount() * frameSize();
1232}
1233
1234ssize_t MediaPlayerService::AudioOutput::frameCount() const
1235{
1236    if (mTrack == 0) return NO_INIT;
1237    return mTrack->frameCount();
1238}
1239
1240ssize_t MediaPlayerService::AudioOutput::channelCount() const
1241{
1242    if (mTrack == 0) return NO_INIT;
1243    return mTrack->channelCount();
1244}
1245
1246ssize_t MediaPlayerService::AudioOutput::frameSize() const
1247{
1248    if (mTrack == 0) return NO_INIT;
1249    return mTrack->frameSize();
1250}
1251
1252uint32_t MediaPlayerService::AudioOutput::latency () const
1253{
1254    return mLatency;
1255}
1256
1257float MediaPlayerService::AudioOutput::msecsPerFrame() const
1258{
1259    return mMsecsPerFrame;
1260}
1261
1262status_t MediaPlayerService::AudioOutput::open(
1263        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1264        AudioCallback cb, void *cookie)
1265{
1266    mCallback = cb;
1267    mCallbackCookie = cookie;
1268
1269    // Check argument "bufferCount" against the mininum buffer count
1270    if (bufferCount < mMinBufferCount) {
1271        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1272        bufferCount = mMinBufferCount;
1273
1274    }
1275    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1276    if (mTrack) close();
1277    int afSampleRate;
1278    int afFrameCount;
1279    int frameCount;
1280
1281    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1282        return NO_INIT;
1283    }
1284    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1285        return NO_INIT;
1286    }
1287
1288    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1289
1290    AudioTrack *t;
1291    if (mCallback != NULL) {
1292        t = new AudioTrack(
1293                mStreamType,
1294                sampleRate,
1295                format,
1296                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1297                frameCount,
1298                0 /* flags */,
1299                CallbackWrapper,
1300                this);
1301    } else {
1302        t = new AudioTrack(
1303                mStreamType,
1304                sampleRate,
1305                format,
1306                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1307                frameCount);
1308    }
1309
1310    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1311        LOGE("Unable to create audio track");
1312        delete t;
1313        return NO_INIT;
1314    }
1315
1316    LOGV("setVolume");
1317    t->setVolume(mLeftVolume, mRightVolume);
1318    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1319    mLatency = t->latency() + kAudioVideoDelayMs;
1320    mTrack = t;
1321    return NO_ERROR;
1322}
1323
1324void MediaPlayerService::AudioOutput::start()
1325{
1326    LOGV("start");
1327    if (mTrack) {
1328        mTrack->setVolume(mLeftVolume, mRightVolume);
1329        mTrack->start();
1330    }
1331}
1332
1333ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1334{
1335    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1336
1337    //LOGV("write(%p, %u)", buffer, size);
1338    if (mTrack) return mTrack->write(buffer, size);
1339    return NO_INIT;
1340}
1341
1342void MediaPlayerService::AudioOutput::stop()
1343{
1344    LOGV("stop");
1345    if (mTrack) mTrack->stop();
1346}
1347
1348void MediaPlayerService::AudioOutput::flush()
1349{
1350    LOGV("flush");
1351    if (mTrack) mTrack->flush();
1352}
1353
1354void MediaPlayerService::AudioOutput::pause()
1355{
1356    LOGV("pause");
1357    if (mTrack) mTrack->pause();
1358}
1359
1360void MediaPlayerService::AudioOutput::close()
1361{
1362    LOGV("close");
1363    delete mTrack;
1364    mTrack = 0;
1365}
1366
1367void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1368{
1369    LOGV("setVolume(%f, %f)", left, right);
1370    mLeftVolume = left;
1371    mRightVolume = right;
1372    if (mTrack) {
1373        mTrack->setVolume(left, right);
1374    }
1375}
1376
1377// static
1378void MediaPlayerService::AudioOutput::CallbackWrapper(
1379        int event, void *cookie, void *info) {
1380    if (event != AudioTrack::EVENT_MORE_DATA) {
1381        return;
1382    }
1383
1384    AudioOutput *me = (AudioOutput *)cookie;
1385    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1386
1387    (*me->mCallback)(
1388            me, buffer->raw, buffer->size, me->mCallbackCookie);
1389}
1390
1391#undef LOG_TAG
1392#define LOG_TAG "AudioCache"
1393MediaPlayerService::AudioCache::AudioCache(const char* name) :
1394    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1395    mError(NO_ERROR), mCommandComplete(false)
1396{
1397    // create ashmem heap
1398    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1399}
1400
1401uint32_t MediaPlayerService::AudioCache::latency () const
1402{
1403    return 0;
1404}
1405
1406float MediaPlayerService::AudioCache::msecsPerFrame() const
1407{
1408    return mMsecsPerFrame;
1409}
1410
1411status_t MediaPlayerService::AudioCache::open(
1412        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1413        AudioCallback cb, void *cookie)
1414{
1415    if (cb != NULL) {
1416        return UNKNOWN_ERROR;  // TODO: implement this.
1417    }
1418
1419    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1420    if (mHeap->getHeapID() < 0) return NO_INIT;
1421    mSampleRate = sampleRate;
1422    mChannelCount = (uint16_t)channelCount;
1423    mFormat = (uint16_t)format;
1424    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1425    return NO_ERROR;
1426}
1427
1428ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1429{
1430    LOGV("write(%p, %u)", buffer, size);
1431    if ((buffer == 0) || (size == 0)) return size;
1432
1433    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1434    if (p == NULL) return NO_INIT;
1435    p += mSize;
1436    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1437    if (mSize + size > mHeap->getSize()) {
1438        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1439        size = mHeap->getSize() - mSize;
1440    }
1441    memcpy(p, buffer, size);
1442    mSize += size;
1443    return size;
1444}
1445
1446// call with lock held
1447status_t MediaPlayerService::AudioCache::wait()
1448{
1449    Mutex::Autolock lock(mLock);
1450    if (!mCommandComplete) {
1451        mSignal.wait(mLock);
1452    }
1453    mCommandComplete = false;
1454
1455    if (mError == NO_ERROR) {
1456        LOGV("wait - success");
1457    } else {
1458        LOGV("wait - error");
1459    }
1460    return mError;
1461}
1462
1463void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1464{
1465    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1466    AudioCache* p = static_cast<AudioCache*>(cookie);
1467
1468    // ignore buffering messages
1469    if (msg == MEDIA_BUFFERING_UPDATE) return;
1470
1471    // set error condition
1472    if (msg == MEDIA_ERROR) {
1473        LOGE("Error %d, %d occurred", ext1, ext2);
1474        p->mError = ext1;
1475    }
1476
1477    // wake up thread
1478    LOGV("wakeup thread");
1479    p->mCommandComplete = true;
1480    p->mSignal.signal();
1481}
1482
1483} // namespace android
1484