MediaPlayerService.cpp revision 7ee8ac94bb1a724a481a7cddf10ce63d35df6296 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18// Proxy for media player implementations
19
20//#define LOG_NDEBUG 0
21#define LOG_TAG "MediaPlayerService"
22#include <utils/Log.h>
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <dirent.h>
27#include <unistd.h>
28
29#include <string.h>
30
31#include <cutils/atomic.h>
32#include <cutils/properties.h> // for property_get
33
34#include <utils/misc.h>
35
36#include <android_runtime/ActivityManager.h>
37
38#include <binder/IPCThreadState.h>
39#include <binder/IServiceManager.h>
40#include <binder/MemoryHeapBase.h>
41#include <binder/MemoryBase.h>
42#include <utils/Errors.h>  // for status_t
43#include <utils/String8.h>
44#include <utils/SystemClock.h>
45#include <utils/Vector.h>
46#include <cutils/properties.h>
47
48#include <media/MediaPlayerInterface.h>
49#include <media/mediarecorder.h>
50#include <media/MediaMetadataRetrieverInterface.h>
51#include <media/Metadata.h>
52#include <media/AudioTrack.h>
53
54#include "MediaRecorderClient.h"
55#include "MediaPlayerService.h"
56#include "MetadataRetrieverClient.h"
57
58#include "MidiFile.h"
59#include "VorbisPlayer.h"
60#include <media/PVPlayer.h>
61#include "TestPlayerStub.h"
62#include "StagefrightPlayer.h"
63
64#include <OMX.h>
65
66/* desktop Linux needs a little help with gettid() */
67#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS)
68#define __KERNEL__
69# include <linux/unistd.h>
70#ifdef _syscall0
71_syscall0(pid_t,gettid)
72#else
73pid_t gettid() { return syscall(__NR_gettid);}
74#endif
75#undef __KERNEL__
76#endif
77
78namespace {
79using android::media::Metadata;
80using android::status_t;
81using android::OK;
82using android::BAD_VALUE;
83using android::NOT_ENOUGH_DATA;
84using android::Parcel;
85
86// Max number of entries in the filter.
87const int kMaxFilterSize = 64;  // I pulled that out of thin air.
88
89// FIXME: Move all the metadata related function in the Metadata.cpp
90
91
92// Unmarshall a filter from a Parcel.
93// Filter format in a parcel:
94//
95//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
96// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
97// |                       number of entries (n)                   |
98// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
99// |                       metadata type 1                         |
100// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
101// |                       metadata type 2                         |
102// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
103//  ....
104// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
105// |                       metadata type n                         |
106// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
107//
108// @param p Parcel that should start with a filter.
109// @param[out] filter On exit contains the list of metadata type to be
110//                    filtered.
111// @param[out] status On exit contains the status code to be returned.
112// @return true if the parcel starts with a valid filter.
113bool unmarshallFilter(const Parcel& p,
114                      Metadata::Filter *filter,
115                      status_t *status)
116{
117    int32_t val;
118    if (p.readInt32(&val) != OK)
119    {
120        LOGE("Failed to read filter's length");
121        *status = NOT_ENOUGH_DATA;
122        return false;
123    }
124
125    if( val > kMaxFilterSize || val < 0)
126    {
127        LOGE("Invalid filter len %d", val);
128        *status = BAD_VALUE;
129        return false;
130    }
131
132    const size_t num = val;
133
134    filter->clear();
135    filter->setCapacity(num);
136
137    size_t size = num * sizeof(Metadata::Type);
138
139
140    if (p.dataAvail() < size)
141    {
142        LOGE("Filter too short expected %d but got %d", size, p.dataAvail());
143        *status = NOT_ENOUGH_DATA;
144        return false;
145    }
146
147    const Metadata::Type *data =
148            static_cast<const Metadata::Type*>(p.readInplace(size));
149
150    if (NULL == data)
151    {
152        LOGE("Filter had no data");
153        *status = BAD_VALUE;
154        return false;
155    }
156
157    // TODO: The stl impl of vector would be more efficient here
158    // because it degenerates into a memcpy on pod types. Try to
159    // replace later or use stl::set.
160    for (size_t i = 0; i < num; ++i)
161    {
162        filter->add(*data);
163        ++data;
164    }
165    *status = OK;
166    return true;
167}
168
169// @param filter Of metadata type.
170// @param val To be searched.
171// @return true if a match was found.
172bool findMetadata(const Metadata::Filter& filter, const int32_t val)
173{
174    // Deal with empty and ANY right away
175    if (filter.isEmpty()) return false;
176    if (filter[0] == Metadata::kAny) return true;
177
178    return filter.indexOf(val) >= 0;
179}
180
181}  // anonymous namespace
182
183
184namespace android {
185
186// TODO: Temp hack until we can register players
187typedef struct {
188    const char *extension;
189    const player_type playertype;
190} extmap;
191extmap FILE_EXTS [] =  {
192        {".mid", SONIVOX_PLAYER},
193        {".midi", SONIVOX_PLAYER},
194        {".smf", SONIVOX_PLAYER},
195        {".xmf", SONIVOX_PLAYER},
196        {".imy", SONIVOX_PLAYER},
197        {".rtttl", SONIVOX_PLAYER},
198        {".rtx", SONIVOX_PLAYER},
199        {".ota", SONIVOX_PLAYER},
200        {".ogg", VORBIS_PLAYER},
201        {".oga", VORBIS_PLAYER},
202};
203
204// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
205/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
206/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
207
208void MediaPlayerService::instantiate() {
209    defaultServiceManager()->addService(
210            String16("media.player"), new MediaPlayerService());
211}
212
213MediaPlayerService::MediaPlayerService()
214{
215    LOGV("MediaPlayerService created");
216    mNextConnId = 1;
217}
218
219MediaPlayerService::~MediaPlayerService()
220{
221    LOGV("MediaPlayerService destroyed");
222}
223
224sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
225{
226#ifndef NO_OPENCORE
227    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
228    wp<MediaRecorderClient> w = recorder;
229    Mutex::Autolock lock(mLock);
230    mMediaRecorderClients.add(w);
231#else
232    sp<MediaRecorderClient> recorder = NULL;
233#endif
234    LOGV("Create new media recorder client from pid %d", pid);
235    return recorder;
236}
237
238void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
239{
240    Mutex::Autolock lock(mLock);
241    mMediaRecorderClients.remove(client);
242    LOGV("Delete media recorder client");
243}
244
245sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
246{
247    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
248    LOGV("Create new media retriever from pid %d", pid);
249    return retriever;
250}
251
252sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
253{
254    int32_t connId = android_atomic_inc(&mNextConnId);
255    sp<Client> c = new Client(this, pid, connId, client);
256    LOGV("Create new client(%d) from pid %d, url=%s, connId=%d", connId, pid, url, connId);
257    if (NO_ERROR != c->setDataSource(url))
258    {
259        c.clear();
260        return c;
261    }
262    wp<Client> w = c;
263    Mutex::Autolock lock(mLock);
264    mClients.add(w);
265    return c;
266}
267
268sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
269        int fd, int64_t offset, int64_t length)
270{
271    int32_t connId = android_atomic_inc(&mNextConnId);
272    sp<Client> c = new Client(this, pid, connId, client);
273    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
274            connId, pid, fd, offset, length);
275    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
276        c.clear();
277    } else {
278        wp<Client> w = c;
279        Mutex::Autolock lock(mLock);
280        mClients.add(w);
281    }
282    ::close(fd);
283    return c;
284}
285
286sp<IOMX> MediaPlayerService::getOMX() {
287    Mutex::Autolock autoLock(mLock);
288
289    if (mOMX.get() == NULL) {
290        mOMX = new OMX;
291    }
292
293    return mOMX;
294}
295
296status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
297{
298    const size_t SIZE = 256;
299    char buffer[SIZE];
300    String8 result;
301
302    result.append(" AudioCache\n");
303    if (mHeap != 0) {
304        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
305                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
306        result.append(buffer);
307    }
308    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
309            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
310    result.append(buffer);
311    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
312            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
313    result.append(buffer);
314    ::write(fd, result.string(), result.size());
315    return NO_ERROR;
316}
317
318status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
319{
320    const size_t SIZE = 256;
321    char buffer[SIZE];
322    String8 result;
323
324    result.append(" AudioOutput\n");
325    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
326            mStreamType, mLeftVolume, mRightVolume);
327    result.append(buffer);
328    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
329            mMsecsPerFrame, mLatency);
330    result.append(buffer);
331    ::write(fd, result.string(), result.size());
332    if (mTrack != 0) {
333        mTrack->dump(fd, args);
334    }
335    return NO_ERROR;
336}
337
338status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
339{
340    const size_t SIZE = 256;
341    char buffer[SIZE];
342    String8 result;
343    result.append(" Client\n");
344    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
345            mPid, mConnId, mStatus, mLoop?"true": "false");
346    result.append(buffer);
347    write(fd, result.string(), result.size());
348    if (mAudioOutput != 0) {
349        mAudioOutput->dump(fd, args);
350    }
351    write(fd, "\n", 1);
352    return NO_ERROR;
353}
354
355static int myTid() {
356#ifdef HAVE_GETTID
357    return gettid();
358#else
359    return getpid();
360#endif
361}
362
363#if defined(__arm__)
364extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
365        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
366extern "C" void free_malloc_leak_info(uint8_t* info);
367
368// Use the String-class below instead of String8 to allocate all memory
369// beforehand and not reenter the heap while we are examining it...
370struct MyString8 {
371    static const size_t MAX_SIZE = 256 * 1024;
372
373    MyString8()
374        : mPtr((char *)malloc(MAX_SIZE)) {
375        *mPtr = '\0';
376    }
377
378    ~MyString8() {
379        free(mPtr);
380    }
381
382    void append(const char *s) {
383        strcat(mPtr, s);
384    }
385
386    const char *string() const {
387        return mPtr;
388    }
389
390    size_t size() const {
391        return strlen(mPtr);
392    }
393
394private:
395    char *mPtr;
396
397    MyString8(const MyString8 &);
398    MyString8 &operator=(const MyString8 &);
399};
400
401void memStatus(int fd, const Vector<String16>& args)
402{
403    const size_t SIZE = 256;
404    char buffer[SIZE];
405    MyString8 result;
406
407    typedef struct {
408        size_t size;
409        size_t dups;
410        intptr_t * backtrace;
411    } AllocEntry;
412
413    uint8_t *info = NULL;
414    size_t overallSize = 0;
415    size_t infoSize = 0;
416    size_t totalMemory = 0;
417    size_t backtraceSize = 0;
418
419    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
420    if (info) {
421        uint8_t *ptr = info;
422        size_t count = overallSize / infoSize;
423
424        snprintf(buffer, SIZE, " Allocation count %i\n", count);
425        result.append(buffer);
426
427        AllocEntry * entries = new AllocEntry[count];
428
429        for (size_t i = 0; i < count; i++) {
430            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
431            AllocEntry *e = &entries[i];
432
433            e->size = *reinterpret_cast<size_t *>(ptr);
434            ptr += sizeof(size_t);
435
436            e->dups = *reinterpret_cast<size_t *>(ptr);
437            ptr += sizeof(size_t);
438
439            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
440            ptr += sizeof(intptr_t) * backtraceSize;
441        }
442
443        // Now we need to sort the entries.  They come sorted by size but
444        // not by stack trace which causes problems using diff.
445        bool moved;
446        do {
447            moved = false;
448            for (size_t i = 0; i < (count - 1); i++) {
449                AllocEntry *e1 = &entries[i];
450                AllocEntry *e2 = &entries[i+1];
451
452                bool swap = e1->size < e2->size;
453                if (e1->size == e2->size) {
454                    for(size_t j = 0; j < backtraceSize; j++) {
455                        if (e1->backtrace[j] == e2->backtrace[j]) {
456                            continue;
457                        }
458                        swap = e1->backtrace[j] < e2->backtrace[j];
459                        break;
460                    }
461                }
462                if (swap) {
463                    AllocEntry t = entries[i];
464                    entries[i] = entries[i+1];
465                    entries[i+1] = t;
466                    moved = true;
467                }
468            }
469        } while (moved);
470
471        for (size_t i = 0; i < count; i++) {
472            AllocEntry *e = &entries[i];
473
474            snprintf(buffer, SIZE, "size %8i, dup %4i", e->size, e->dups);
475            result.append(buffer);
476            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
477                if (ct) {
478                    result.append(", ");
479                }
480                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
481                result.append(buffer);
482            }
483            result.append("\n");
484        }
485
486        delete[] entries;
487        free_malloc_leak_info(info);
488    }
489
490    write(fd, result.string(), result.size());
491}
492#endif
493
494status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
495{
496    const size_t SIZE = 256;
497    char buffer[SIZE];
498    String8 result;
499    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
500        snprintf(buffer, SIZE, "Permission Denial: "
501                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
502                IPCThreadState::self()->getCallingPid(),
503                IPCThreadState::self()->getCallingUid());
504        result.append(buffer);
505    } else {
506        Mutex::Autolock lock(mLock);
507        for (int i = 0, n = mClients.size(); i < n; ++i) {
508            sp<Client> c = mClients[i].promote();
509            if (c != 0) c->dump(fd, args);
510        }
511        for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
512            result.append(" MediaRecorderClient\n");
513            sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
514            snprintf(buffer, 255, "  pid(%d)\n\n", c->mPid);
515            result.append(buffer);
516        }
517
518        result.append(" Files opened and/or mapped:\n");
519        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
520        FILE *f = fopen(buffer, "r");
521        if (f) {
522            while (!feof(f)) {
523                fgets(buffer, SIZE, f);
524                if (strstr(buffer, " /sdcard/") ||
525                    strstr(buffer, " /system/sounds/") ||
526                    strstr(buffer, " /system/media/")) {
527                    result.append("  ");
528                    result.append(buffer);
529                }
530            }
531            fclose(f);
532        } else {
533            result.append("couldn't open ");
534            result.append(buffer);
535            result.append("\n");
536        }
537
538        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
539        DIR *d = opendir(buffer);
540        if (d) {
541            struct dirent *ent;
542            while((ent = readdir(d)) != NULL) {
543                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
544                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
545                    struct stat s;
546                    if (lstat(buffer, &s) == 0) {
547                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
548                            char linkto[256];
549                            int len = readlink(buffer, linkto, sizeof(linkto));
550                            if(len > 0) {
551                                if(len > 255) {
552                                    linkto[252] = '.';
553                                    linkto[253] = '.';
554                                    linkto[254] = '.';
555                                    linkto[255] = 0;
556                                } else {
557                                    linkto[len] = 0;
558                                }
559                                if (strstr(linkto, "/sdcard/") == linkto ||
560                                    strstr(linkto, "/system/sounds/") == linkto ||
561                                    strstr(linkto, "/system/media/") == linkto) {
562                                    result.append("  ");
563                                    result.append(buffer);
564                                    result.append(" -> ");
565                                    result.append(linkto);
566                                    result.append("\n");
567                                }
568                            }
569                        } else {
570                            result.append("  unexpected type for ");
571                            result.append(buffer);
572                            result.append("\n");
573                        }
574                    }
575                }
576            }
577            closedir(d);
578        } else {
579            result.append("couldn't open ");
580            result.append(buffer);
581            result.append("\n");
582        }
583
584#if defined(__arm__)
585        bool dumpMem = false;
586        for (size_t i = 0; i < args.size(); i++) {
587            if (args[i] == String16("-m")) {
588                dumpMem = true;
589            }
590        }
591        if (dumpMem) {
592            memStatus(fd, args);
593        }
594#endif
595    }
596    write(fd, result.string(), result.size());
597    return NO_ERROR;
598}
599
600void MediaPlayerService::removeClient(wp<Client> client)
601{
602    Mutex::Autolock lock(mLock);
603    mClients.remove(client);
604}
605
606MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
607        int32_t connId, const sp<IMediaPlayerClient>& client)
608{
609    LOGV("Client(%d) constructor", connId);
610    mPid = pid;
611    mConnId = connId;
612    mService = service;
613    mClient = client;
614    mLoop = false;
615    mStatus = NO_INIT;
616#if CALLBACK_ANTAGONIZER
617    LOGD("create Antagonizer");
618    mAntagonizer = new Antagonizer(notify, this);
619#endif
620}
621
622MediaPlayerService::Client::~Client()
623{
624    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
625    mAudioOutput.clear();
626    wp<Client> client(this);
627    disconnect();
628    mService->removeClient(client);
629}
630
631void MediaPlayerService::Client::disconnect()
632{
633    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
634    // grab local reference and clear main reference to prevent future
635    // access to object
636    sp<MediaPlayerBase> p;
637    {
638        Mutex::Autolock l(mLock);
639        p = mPlayer;
640    }
641    mClient.clear();
642
643    mPlayer.clear();
644
645    // clear the notification to prevent callbacks to dead client
646    // and reset the player. We assume the player will serialize
647    // access to itself if necessary.
648    if (p != 0) {
649        p->setNotifyCallback(0, 0);
650#if CALLBACK_ANTAGONIZER
651        LOGD("kill Antagonizer");
652        mAntagonizer->kill();
653#endif
654        p->reset();
655    }
656
657    IPCThreadState::self()->flushCommands();
658}
659
660static player_type getDefaultPlayerType() {
661#if BUILD_WITH_FULL_STAGEFRIGHT
662    char value[PROPERTY_VALUE_MAX];
663    if (property_get("media.stagefright.enable-player", value, NULL)
664        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
665        return STAGEFRIGHT_PLAYER;
666    }
667#endif
668
669    return PV_PLAYER;
670}
671
672player_type getPlayerType(int fd, int64_t offset, int64_t length)
673{
674    char buf[20];
675    lseek(fd, offset, SEEK_SET);
676    read(fd, buf, sizeof(buf));
677    lseek(fd, offset, SEEK_SET);
678
679    long ident = *((long*)buf);
680
681    // Ogg vorbis?
682    if (ident == 0x5367674f) // 'OggS'
683        return VORBIS_PLAYER;
684
685    // Some kind of MIDI?
686    EAS_DATA_HANDLE easdata;
687    if (EAS_Init(&easdata) == EAS_SUCCESS) {
688        EAS_FILE locator;
689        locator.path = NULL;
690        locator.fd = fd;
691        locator.offset = offset;
692        locator.length = length;
693        EAS_HANDLE  eashandle;
694        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
695            EAS_CloseFile(easdata, eashandle);
696            EAS_Shutdown(easdata);
697            return SONIVOX_PLAYER;
698        }
699        EAS_Shutdown(easdata);
700    }
701
702    return getDefaultPlayerType();
703}
704
705player_type getPlayerType(const char* url)
706{
707    if (TestPlayerStub::canBeUsed(url)) {
708        return TEST_PLAYER;
709    }
710
711    // use MidiFile for MIDI extensions
712    int lenURL = strlen(url);
713    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
714        int len = strlen(FILE_EXTS[i].extension);
715        int start = lenURL - len;
716        if (start > 0) {
717            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
718                return FILE_EXTS[i].playertype;
719            }
720        }
721    }
722
723    if (!strncasecmp(url, "http://", 7)) {
724        char value[PROPERTY_VALUE_MAX];
725        if (!property_get("media.stagefright.enable-http", value, NULL)
726            || (strcmp(value, "1") && strcasecmp(value, "true"))) {
727            // For now, we're going to use PV for http-based playback
728            // by default until we can clear up a few more issues.
729            return PV_PLAYER;
730        }
731    }
732
733    return getDefaultPlayerType();
734}
735
736static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
737        notify_callback_f notifyFunc)
738{
739    sp<MediaPlayerBase> p;
740    switch (playerType) {
741#ifndef NO_OPENCORE
742        case PV_PLAYER:
743            LOGV(" create PVPlayer");
744            p = new PVPlayer();
745            break;
746#endif
747        case SONIVOX_PLAYER:
748            LOGV(" create MidiFile");
749            p = new MidiFile();
750            break;
751        case VORBIS_PLAYER:
752            LOGV(" create VorbisPlayer");
753            p = new VorbisPlayer();
754            break;
755#if BUILD_WITH_FULL_STAGEFRIGHT
756        case STAGEFRIGHT_PLAYER:
757            LOGV(" create StagefrightPlayer");
758            p = new StagefrightPlayer;
759            break;
760#endif
761        case TEST_PLAYER:
762            LOGV("Create Test Player stub");
763            p = new TestPlayerStub();
764            break;
765    }
766    if (p != NULL) {
767        if (p->initCheck() == NO_ERROR) {
768            p->setNotifyCallback(cookie, notifyFunc);
769        } else {
770            p.clear();
771        }
772    }
773    if (p == NULL) {
774        LOGE("Failed to create player object");
775    }
776    return p;
777}
778
779sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
780{
781    // determine if we have the right player type
782    sp<MediaPlayerBase> p = mPlayer;
783    if ((p != NULL) && (p->playerType() != playerType)) {
784        LOGV("delete player");
785        p.clear();
786    }
787    if (p == NULL) {
788        p = android::createPlayer(playerType, this, notify);
789    }
790    return p;
791}
792
793status_t MediaPlayerService::Client::setDataSource(const char *url)
794{
795    LOGV("setDataSource(%s)", url);
796    if (url == NULL)
797        return UNKNOWN_ERROR;
798
799    if (strncmp(url, "content://", 10) == 0) {
800        // get a filedescriptor for the content Uri and
801        // pass it to the setDataSource(fd) method
802
803        String16 url16(url);
804        int fd = android::openContentProviderFile(url16);
805        if (fd < 0)
806        {
807            LOGE("Couldn't open fd for %s", url);
808            return UNKNOWN_ERROR;
809        }
810        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
811        close(fd);
812        return mStatus;
813    } else {
814        player_type playerType = getPlayerType(url);
815        LOGV("player type = %d", playerType);
816
817        // create the right type of player
818        sp<MediaPlayerBase> p = createPlayer(playerType);
819        if (p == NULL) return NO_INIT;
820
821        if (!p->hardwareOutput()) {
822            mAudioOutput = new AudioOutput();
823            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
824        }
825
826        // now set data source
827        LOGV(" setDataSource");
828        mStatus = p->setDataSource(url);
829        if (mStatus == NO_ERROR) {
830            mPlayer = p;
831        } else {
832            LOGE("  error: %d", mStatus);
833        }
834        return mStatus;
835    }
836}
837
838status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
839{
840    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
841    struct stat sb;
842    int ret = fstat(fd, &sb);
843    if (ret != 0) {
844        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
845        return UNKNOWN_ERROR;
846    }
847
848    LOGV("st_dev  = %llu", sb.st_dev);
849    LOGV("st_mode = %u", sb.st_mode);
850    LOGV("st_uid  = %lu", sb.st_uid);
851    LOGV("st_gid  = %lu", sb.st_gid);
852    LOGV("st_size = %llu", sb.st_size);
853
854    if (offset >= sb.st_size) {
855        LOGE("offset error");
856        ::close(fd);
857        return UNKNOWN_ERROR;
858    }
859    if (offset + length > sb.st_size) {
860        length = sb.st_size - offset;
861        LOGV("calculated length = %lld", length);
862    }
863
864    player_type playerType = getPlayerType(fd, offset, length);
865    LOGV("player type = %d", playerType);
866
867    // create the right type of player
868    sp<MediaPlayerBase> p = createPlayer(playerType);
869    if (p == NULL) return NO_INIT;
870
871    if (!p->hardwareOutput()) {
872        mAudioOutput = new AudioOutput();
873        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
874    }
875
876    // now set data source
877    mStatus = p->setDataSource(fd, offset, length);
878    if (mStatus == NO_ERROR) mPlayer = p;
879    return mStatus;
880}
881
882status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
883{
884    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
885    sp<MediaPlayerBase> p = getPlayer();
886    if (p == 0) return UNKNOWN_ERROR;
887    return p->setVideoSurface(surface);
888}
889
890status_t MediaPlayerService::Client::invoke(const Parcel& request,
891                                            Parcel *reply)
892{
893    sp<MediaPlayerBase> p = getPlayer();
894    if (p == NULL) return UNKNOWN_ERROR;
895    return p->invoke(request, reply);
896}
897
898// This call doesn't need to access the native player.
899status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
900{
901    status_t status;
902    media::Metadata::Filter allow, drop;
903
904    if (unmarshallFilter(filter, &allow, &status) &&
905        unmarshallFilter(filter, &drop, &status)) {
906        Mutex::Autolock lock(mLock);
907
908        mMetadataAllow = allow;
909        mMetadataDrop = drop;
910    }
911    return status;
912}
913
914status_t MediaPlayerService::Client::getMetadata(
915        bool update_only, bool apply_filter, Parcel *reply)
916{
917    sp<MediaPlayerBase> player = getPlayer();
918    if (player == 0) return UNKNOWN_ERROR;
919
920    status_t status;
921    // Placeholder for the return code, updated by the caller.
922    reply->writeInt32(-1);
923
924    media::Metadata::Filter ids;
925
926    // We don't block notifications while we fetch the data. We clear
927    // mMetadataUpdated first so we don't lose notifications happening
928    // during the rest of this call.
929    {
930        Mutex::Autolock lock(mLock);
931        if (update_only) {
932            ids = mMetadataUpdated;
933        }
934        mMetadataUpdated.clear();
935    }
936
937    media::Metadata metadata(reply);
938
939    metadata.appendHeader();
940    status = player->getMetadata(ids, reply);
941
942    if (status != OK) {
943        metadata.resetParcel();
944        LOGE("getMetadata failed %d", status);
945        return status;
946    }
947
948    // FIXME: Implement filtering on the result. Not critical since
949    // filtering takes place on the update notifications already. This
950    // would be when all the metadata are fetch and a filter is set.
951
952    // Everything is fine, update the metadata length.
953    metadata.updateLength();
954    return OK;
955}
956
957status_t MediaPlayerService::Client::prepareAsync()
958{
959    LOGV("[%d] prepareAsync", mConnId);
960    sp<MediaPlayerBase> p = getPlayer();
961    if (p == 0) return UNKNOWN_ERROR;
962    status_t ret = p->prepareAsync();
963#if CALLBACK_ANTAGONIZER
964    LOGD("start Antagonizer");
965    if (ret == NO_ERROR) mAntagonizer->start();
966#endif
967    return ret;
968}
969
970status_t MediaPlayerService::Client::start()
971{
972    LOGV("[%d] start", mConnId);
973    sp<MediaPlayerBase> p = getPlayer();
974    if (p == 0) return UNKNOWN_ERROR;
975    p->setLooping(mLoop);
976    return p->start();
977}
978
979status_t MediaPlayerService::Client::stop()
980{
981    LOGV("[%d] stop", mConnId);
982    sp<MediaPlayerBase> p = getPlayer();
983    if (p == 0) return UNKNOWN_ERROR;
984    return p->stop();
985}
986
987status_t MediaPlayerService::Client::pause()
988{
989    LOGV("[%d] pause", mConnId);
990    sp<MediaPlayerBase> p = getPlayer();
991    if (p == 0) return UNKNOWN_ERROR;
992    return p->pause();
993}
994
995status_t MediaPlayerService::Client::isPlaying(bool* state)
996{
997    *state = false;
998    sp<MediaPlayerBase> p = getPlayer();
999    if (p == 0) return UNKNOWN_ERROR;
1000    *state = p->isPlaying();
1001    LOGV("[%d] isPlaying: %d", mConnId, *state);
1002    return NO_ERROR;
1003}
1004
1005status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1006{
1007    LOGV("getCurrentPosition");
1008    sp<MediaPlayerBase> p = getPlayer();
1009    if (p == 0) return UNKNOWN_ERROR;
1010    status_t ret = p->getCurrentPosition(msec);
1011    if (ret == NO_ERROR) {
1012        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1013    } else {
1014        LOGE("getCurrentPosition returned %d", ret);
1015    }
1016    return ret;
1017}
1018
1019status_t MediaPlayerService::Client::getDuration(int *msec)
1020{
1021    LOGV("getDuration");
1022    sp<MediaPlayerBase> p = getPlayer();
1023    if (p == 0) return UNKNOWN_ERROR;
1024    status_t ret = p->getDuration(msec);
1025    if (ret == NO_ERROR) {
1026        LOGV("[%d] getDuration = %d", mConnId, *msec);
1027    } else {
1028        LOGE("getDuration returned %d", ret);
1029    }
1030    return ret;
1031}
1032
1033status_t MediaPlayerService::Client::seekTo(int msec)
1034{
1035    LOGV("[%d] seekTo(%d)", mConnId, msec);
1036    sp<MediaPlayerBase> p = getPlayer();
1037    if (p == 0) return UNKNOWN_ERROR;
1038    return p->seekTo(msec);
1039}
1040
1041status_t MediaPlayerService::Client::reset()
1042{
1043    LOGV("[%d] reset", mConnId);
1044    sp<MediaPlayerBase> p = getPlayer();
1045    if (p == 0) return UNKNOWN_ERROR;
1046    return p->reset();
1047}
1048
1049status_t MediaPlayerService::Client::setAudioStreamType(int type)
1050{
1051    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1052    // TODO: for hardware output, call player instead
1053    Mutex::Autolock l(mLock);
1054    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1055    return NO_ERROR;
1056}
1057
1058status_t MediaPlayerService::Client::setLooping(int loop)
1059{
1060    LOGV("[%d] setLooping(%d)", mConnId, loop);
1061    mLoop = loop;
1062    sp<MediaPlayerBase> p = getPlayer();
1063    if (p != 0) return p->setLooping(loop);
1064    return NO_ERROR;
1065}
1066
1067status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1068{
1069    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1070    // TODO: for hardware output, call player instead
1071    Mutex::Autolock l(mLock);
1072    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1073    return NO_ERROR;
1074}
1075
1076
1077void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1078{
1079    Client* client = static_cast<Client*>(cookie);
1080
1081    if (MEDIA_INFO == msg &&
1082        MEDIA_INFO_METADATA_UPDATE == ext1) {
1083        const media::Metadata::Type metadata_type = ext2;
1084
1085        if(client->shouldDropMetadata(metadata_type)) {
1086            return;
1087        }
1088
1089        // Update the list of metadata that have changed. getMetadata
1090        // also access mMetadataUpdated and clears it.
1091        client->addNewMetadataUpdate(metadata_type);
1092    }
1093    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1094    client->mClient->notify(msg, ext1, ext2);
1095}
1096
1097
1098bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1099{
1100    Mutex::Autolock lock(mLock);
1101
1102    if (findMetadata(mMetadataDrop, code)) {
1103        return true;
1104    }
1105
1106    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1107        return false;
1108    } else {
1109        return true;
1110    }
1111}
1112
1113
1114void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1115    Mutex::Autolock lock(mLock);
1116    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1117        mMetadataUpdated.add(metadata_type);
1118    }
1119}
1120
1121#if CALLBACK_ANTAGONIZER
1122const int Antagonizer::interval = 10000; // 10 msecs
1123
1124Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1125    mExit(false), mActive(false), mClient(client), mCb(cb)
1126{
1127    createThread(callbackThread, this);
1128}
1129
1130void Antagonizer::kill()
1131{
1132    Mutex::Autolock _l(mLock);
1133    mActive = false;
1134    mExit = true;
1135    mCondition.wait(mLock);
1136}
1137
1138int Antagonizer::callbackThread(void* user)
1139{
1140    LOGD("Antagonizer started");
1141    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1142    while (!p->mExit) {
1143        if (p->mActive) {
1144            LOGV("send event");
1145            p->mCb(p->mClient, 0, 0, 0);
1146        }
1147        usleep(interval);
1148    }
1149    Mutex::Autolock _l(p->mLock);
1150    p->mCondition.signal();
1151    LOGD("Antagonizer stopped");
1152    return 0;
1153}
1154#endif
1155
1156static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1157
1158sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1159{
1160    LOGV("decode(%s)", url);
1161    sp<MemoryBase> mem;
1162    sp<MediaPlayerBase> player;
1163
1164    // Protect our precious, precious DRMd ringtones by only allowing
1165    // decoding of http, but not filesystem paths or content Uris.
1166    // If the application wants to decode those, it should open a
1167    // filedescriptor for them and use that.
1168    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1169        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1170        return mem;
1171    }
1172
1173    player_type playerType = getPlayerType(url);
1174    LOGV("player type = %d", playerType);
1175
1176    // create the right type of player
1177    sp<AudioCache> cache = new AudioCache(url);
1178    player = android::createPlayer(playerType, cache.get(), cache->notify);
1179    if (player == NULL) goto Exit;
1180    if (player->hardwareOutput()) goto Exit;
1181
1182    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1183
1184    // set data source
1185    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1186
1187    LOGV("prepare");
1188    player->prepareAsync();
1189
1190    LOGV("wait for prepare");
1191    if (cache->wait() != NO_ERROR) goto Exit;
1192
1193    LOGV("start");
1194    player->start();
1195
1196    LOGV("wait for playback complete");
1197    if (cache->wait() != NO_ERROR) goto Exit;
1198
1199    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1200    *pSampleRate = cache->sampleRate();
1201    *pNumChannels = cache->channelCount();
1202    *pFormat = cache->format();
1203    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1204
1205Exit:
1206    if (player != 0) player->reset();
1207    return mem;
1208}
1209
1210sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1211{
1212    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1213    sp<MemoryBase> mem;
1214    sp<MediaPlayerBase> player;
1215
1216    player_type playerType = getPlayerType(fd, offset, length);
1217    LOGV("player type = %d", playerType);
1218
1219    // create the right type of player
1220    sp<AudioCache> cache = new AudioCache("decode_fd");
1221    player = android::createPlayer(playerType, cache.get(), cache->notify);
1222    if (player == NULL) goto Exit;
1223    if (player->hardwareOutput()) goto Exit;
1224
1225    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1226
1227    // set data source
1228    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1229
1230    LOGV("prepare");
1231    player->prepareAsync();
1232
1233    LOGV("wait for prepare");
1234    if (cache->wait() != NO_ERROR) goto Exit;
1235
1236    LOGV("start");
1237    player->start();
1238
1239    LOGV("wait for playback complete");
1240    if (cache->wait() != NO_ERROR) goto Exit;
1241
1242    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1243    *pSampleRate = cache->sampleRate();
1244    *pNumChannels = cache->channelCount();
1245    *pFormat = cache->format();
1246    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1247
1248Exit:
1249    if (player != 0) player->reset();
1250    ::close(fd);
1251    return mem;
1252}
1253
1254/*
1255 * Avert your eyes, ugly hack ahead.
1256 * The following is to support music visualizations.
1257 */
1258
1259static const int NUMVIZBUF = 32;
1260static const int VIZBUFFRAMES = 1024;
1261static const int BUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1262static const int TOTALBUFTIMEMSEC = NUMVIZBUF * BUFTIMEMSEC;
1263
1264static bool gotMem = false;
1265static sp<MemoryHeapBase> heap;
1266static sp<MemoryBase> mem[NUMVIZBUF];
1267static uint64_t endTime;
1268static uint64_t lastReadTime;
1269static uint64_t lastWriteTime;
1270static int writeIdx = 0;
1271
1272static void allocVizBufs() {
1273    if (!gotMem) {
1274        heap = new MemoryHeapBase(NUMVIZBUF * VIZBUFFRAMES * 2, 0, "snooper");
1275        for (int i=0;i<NUMVIZBUF;i++) {
1276            mem[i] = new MemoryBase(heap, VIZBUFFRAMES * 2 * i, VIZBUFFRAMES * 2);
1277        }
1278        endTime = 0;
1279        gotMem = true;
1280    }
1281}
1282
1283
1284/*
1285 * Get a buffer of audio data that is about to be played.
1286 * We don't synchronize this because in practice the writer
1287 * is ahead of the reader, and even if we did happen to catch
1288 * a buffer while it's being written, it's just a visualization,
1289 * so no harm done.
1290 */
1291static sp<MemoryBase> getVizBuffer() {
1292
1293    allocVizBufs();
1294
1295    lastReadTime = uptimeMillis();
1296
1297    // if there is no recent buffer (yet), just return empty handed
1298    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1299        //LOGI("@@@@    no audio data to look at yet: %d + %d < %d", (int)lastWriteTime, TOTALBUFTIMEMSEC, (int)lastReadTime);
1300        return NULL;
1301    }
1302
1303    int timedelta = endTime - lastReadTime;
1304    if (timedelta < 0) timedelta = 0;
1305    int framedelta = timedelta * 44100 / 1000;
1306    int headIdx = (writeIdx - framedelta) / VIZBUFFRAMES - 1;
1307    while (headIdx < 0) {
1308        headIdx += NUMVIZBUF;
1309    }
1310    return mem[headIdx];
1311}
1312
1313// Append the data to the vizualization buffer
1314static void makeVizBuffers(const char *data, int len, uint64_t time) {
1315
1316    allocVizBufs();
1317
1318    uint64_t startTime = time;
1319    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1320    int offset = writeIdx;
1321    int maxoff = heap->getSize() / 2; // in shorts
1322    short *base = (short*)heap->getBase();
1323    short *src = (short*)data;
1324    while (len > 0) {
1325
1326        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1327        // This should still be good enough for a visualization
1328        base[offset++] = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1329        src += 2;
1330        len -= frameSize;
1331        if (offset >= maxoff) {
1332            offset = 0;
1333        }
1334    }
1335    writeIdx = offset;
1336    endTime = time + (len / frameSize) / 44;
1337    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1338}
1339
1340sp<IMemory> MediaPlayerService::snoop()
1341{
1342    sp<MemoryBase> mem = getVizBuffer();
1343    return mem;
1344}
1345
1346
1347#undef LOG_TAG
1348#define LOG_TAG "AudioSink"
1349MediaPlayerService::AudioOutput::AudioOutput()
1350    : mCallback(NULL),
1351      mCallbackCookie(NULL) {
1352    mTrack = 0;
1353    mStreamType = AudioSystem::MUSIC;
1354    mLeftVolume = 1.0;
1355    mRightVolume = 1.0;
1356    mLatency = 0;
1357    mMsecsPerFrame = 0;
1358    mNumFramesWritten = 0;
1359    setMinBufferCount();
1360}
1361
1362MediaPlayerService::AudioOutput::~AudioOutput()
1363{
1364    close();
1365}
1366
1367void MediaPlayerService::AudioOutput::setMinBufferCount()
1368{
1369    char value[PROPERTY_VALUE_MAX];
1370    if (property_get("ro.kernel.qemu", value, 0)) {
1371        mIsOnEmulator = true;
1372        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1373    }
1374}
1375
1376bool MediaPlayerService::AudioOutput::isOnEmulator()
1377{
1378    setMinBufferCount();
1379    return mIsOnEmulator;
1380}
1381
1382int MediaPlayerService::AudioOutput::getMinBufferCount()
1383{
1384    setMinBufferCount();
1385    return mMinBufferCount;
1386}
1387
1388ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1389{
1390    if (mTrack == 0) return NO_INIT;
1391    return mTrack->frameCount() * frameSize();
1392}
1393
1394ssize_t MediaPlayerService::AudioOutput::frameCount() const
1395{
1396    if (mTrack == 0) return NO_INIT;
1397    return mTrack->frameCount();
1398}
1399
1400ssize_t MediaPlayerService::AudioOutput::channelCount() const
1401{
1402    if (mTrack == 0) return NO_INIT;
1403    return mTrack->channelCount();
1404}
1405
1406ssize_t MediaPlayerService::AudioOutput::frameSize() const
1407{
1408    if (mTrack == 0) return NO_INIT;
1409    return mTrack->frameSize();
1410}
1411
1412uint32_t MediaPlayerService::AudioOutput::latency () const
1413{
1414    return mLatency;
1415}
1416
1417float MediaPlayerService::AudioOutput::msecsPerFrame() const
1418{
1419    return mMsecsPerFrame;
1420}
1421
1422status_t MediaPlayerService::AudioOutput::open(
1423        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1424        AudioCallback cb, void *cookie)
1425{
1426    mCallback = cb;
1427    mCallbackCookie = cookie;
1428
1429    // Check argument "bufferCount" against the mininum buffer count
1430    if (bufferCount < mMinBufferCount) {
1431        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1432        bufferCount = mMinBufferCount;
1433
1434    }
1435    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1436    if (mTrack) close();
1437    int afSampleRate;
1438    int afFrameCount;
1439    int frameCount;
1440
1441    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1442        return NO_INIT;
1443    }
1444    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1445        return NO_INIT;
1446    }
1447
1448    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1449
1450    AudioTrack *t;
1451    if (mCallback != NULL) {
1452        t = new AudioTrack(
1453                mStreamType,
1454                sampleRate,
1455                format,
1456                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1457                frameCount,
1458                0 /* flags */,
1459                CallbackWrapper,
1460                this);
1461    } else {
1462        t = new AudioTrack(
1463                mStreamType,
1464                sampleRate,
1465                format,
1466                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1467                frameCount);
1468    }
1469
1470    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1471        LOGE("Unable to create audio track");
1472        delete t;
1473        return NO_INIT;
1474    }
1475
1476    LOGV("setVolume");
1477    t->setVolume(mLeftVolume, mRightVolume);
1478    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1479    mLatency = t->latency();
1480    mTrack = t;
1481    return NO_ERROR;
1482}
1483
1484void MediaPlayerService::AudioOutput::start()
1485{
1486    LOGV("start");
1487    if (mTrack) {
1488        mTrack->setVolume(mLeftVolume, mRightVolume);
1489        mTrack->start();
1490        mTrack->getPosition(&mNumFramesWritten);
1491    }
1492}
1493
1494void MediaPlayerService::AudioOutput::snoopWrite(const void* buffer, size_t size) {
1495    // Only make visualization buffers if anyone recently requested visualization data
1496    uint64_t now = uptimeMillis();
1497    if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1498        // Based on the current play counter, the number of frames written and
1499        // the current real time we can calculate the approximate real start
1500        // time of the buffer we're about to write.
1501        uint32_t pos;
1502        mTrack->getPosition(&pos);
1503
1504        // we're writing ahead by this many frames:
1505        int ahead = mNumFramesWritten - pos;
1506        //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1507        // which is this many milliseconds, assuming 44100 Hz:
1508        ahead /= 44;
1509
1510        makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1511        lastWriteTime = now;
1512    }
1513}
1514
1515
1516ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1517{
1518    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1519
1520    //LOGV("write(%p, %u)", buffer, size);
1521    if (mTrack) {
1522        snoopWrite(buffer, size);
1523        ssize_t ret = mTrack->write(buffer, size);
1524        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1525        return ret;
1526    }
1527    return NO_INIT;
1528}
1529
1530void MediaPlayerService::AudioOutput::stop()
1531{
1532    LOGV("stop");
1533    if (mTrack) mTrack->stop();
1534    lastWriteTime = 0;
1535}
1536
1537void MediaPlayerService::AudioOutput::flush()
1538{
1539    LOGV("flush");
1540    if (mTrack) mTrack->flush();
1541}
1542
1543void MediaPlayerService::AudioOutput::pause()
1544{
1545    LOGV("pause");
1546    if (mTrack) mTrack->pause();
1547    lastWriteTime = 0;
1548}
1549
1550void MediaPlayerService::AudioOutput::close()
1551{
1552    LOGV("close");
1553    delete mTrack;
1554    mTrack = 0;
1555}
1556
1557void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1558{
1559    LOGV("setVolume(%f, %f)", left, right);
1560    mLeftVolume = left;
1561    mRightVolume = right;
1562    if (mTrack) {
1563        mTrack->setVolume(left, right);
1564    }
1565}
1566
1567// static
1568void MediaPlayerService::AudioOutput::CallbackWrapper(
1569        int event, void *cookie, void *info) {
1570    //LOGV("callbackwrapper");
1571    if (event != AudioTrack::EVENT_MORE_DATA) {
1572        return;
1573    }
1574
1575    AudioOutput *me = (AudioOutput *)cookie;
1576    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1577
1578    (*me->mCallback)(
1579            me, buffer->raw, buffer->size, me->mCallbackCookie);
1580    me->snoopWrite(buffer->raw, buffer->size);
1581}
1582
1583#undef LOG_TAG
1584#define LOG_TAG "AudioCache"
1585MediaPlayerService::AudioCache::AudioCache(const char* name) :
1586    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1587    mError(NO_ERROR), mCommandComplete(false)
1588{
1589    // create ashmem heap
1590    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1591}
1592
1593uint32_t MediaPlayerService::AudioCache::latency () const
1594{
1595    return 0;
1596}
1597
1598float MediaPlayerService::AudioCache::msecsPerFrame() const
1599{
1600    return mMsecsPerFrame;
1601}
1602
1603status_t MediaPlayerService::AudioCache::open(
1604        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1605        AudioCallback cb, void *cookie)
1606{
1607    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1608    if (cb != NULL) {
1609        return UNKNOWN_ERROR;  // TODO: implement this.
1610    }
1611    if (mHeap->getHeapID() < 0) {
1612        return NO_INIT;
1613    }
1614
1615    mSampleRate = sampleRate;
1616    mChannelCount = (uint16_t)channelCount;
1617    mFormat = (uint16_t)format;
1618    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1619    return NO_ERROR;
1620}
1621
1622ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1623{
1624    LOGV("write(%p, %u)", buffer, size);
1625    if ((buffer == 0) || (size == 0)) return size;
1626
1627    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1628    if (p == NULL) return NO_INIT;
1629    p += mSize;
1630    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1631    if (mSize + size > mHeap->getSize()) {
1632        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1633        size = mHeap->getSize() - mSize;
1634    }
1635    memcpy(p, buffer, size);
1636    mSize += size;
1637    return size;
1638}
1639
1640// call with lock held
1641status_t MediaPlayerService::AudioCache::wait()
1642{
1643    Mutex::Autolock lock(mLock);
1644    if (!mCommandComplete) {
1645        mSignal.wait(mLock);
1646    }
1647    mCommandComplete = false;
1648
1649    if (mError == NO_ERROR) {
1650        LOGV("wait - success");
1651    } else {
1652        LOGV("wait - error");
1653    }
1654    return mError;
1655}
1656
1657void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1658{
1659    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1660    AudioCache* p = static_cast<AudioCache*>(cookie);
1661
1662    // ignore buffering messages
1663    switch (msg)
1664    {
1665    case MEDIA_ERROR:
1666        LOGE("Error %d, %d occurred", ext1, ext2);
1667        p->mError = ext1;
1668        break;
1669    case MEDIA_PREPARED:
1670        LOGV("prepared");
1671        break;
1672    case MEDIA_PLAYBACK_COMPLETE:
1673        LOGV("playback complete");
1674        break;
1675    default:
1676        LOGV("ignored");
1677        return;
1678    }
1679
1680    // wake up thread
1681    p->mCommandComplete = true;
1682    p->mSignal.signal();
1683}
1684
1685} // namespace android
1686