MediaPlayerService.cpp revision 4bbc0ba371c52951191eff1cba7c1ea5d27ee976 
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#ifndef NO_OPENCORE
203        {".wma", PV_PLAYER},
204        {".wmv", PV_PLAYER},
205        {".asf", PV_PLAYER},
206#endif
207};
208
209// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
210/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
211/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
212
213void MediaPlayerService::instantiate() {
214    defaultServiceManager()->addService(
215            String16("media.player"), new MediaPlayerService());
216}
217
218MediaPlayerService::MediaPlayerService()
219{
220    LOGV("MediaPlayerService created");
221    mNextConnId = 1;
222}
223
224MediaPlayerService::~MediaPlayerService()
225{
226    LOGV("MediaPlayerService destroyed");
227}
228
229sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
230{
231#ifndef NO_OPENCORE
232    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
233    wp<MediaRecorderClient> w = recorder;
234    Mutex::Autolock lock(mLock);
235    mMediaRecorderClients.add(w);
236#else
237    sp<MediaRecorderClient> recorder = NULL;
238#endif
239    LOGV("Create new media recorder client from pid %d", pid);
240    return recorder;
241}
242
243void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
244{
245    Mutex::Autolock lock(mLock);
246    mMediaRecorderClients.remove(client);
247    LOGV("Delete media recorder client");
248}
249
250sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
251{
252    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
253    LOGV("Create new media retriever from pid %d", pid);
254    return retriever;
255}
256
257sp<IMediaPlayer> MediaPlayerService::create(
258        pid_t pid, const sp<IMediaPlayerClient>& client, const char* url,
259        const KeyedVector<String8, String8> *headers)
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, url=%s, connId=%d", connId, pid, url, connId);
264    if (NO_ERROR != c->setDataSource(url, headers))
265    {
266        c.clear();
267        return c;
268    }
269    wp<Client> w = c;
270    Mutex::Autolock lock(mLock);
271    mClients.add(w);
272    return c;
273}
274
275sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
276        int fd, int64_t offset, int64_t length)
277{
278    int32_t connId = android_atomic_inc(&mNextConnId);
279    sp<Client> c = new Client(this, pid, connId, client);
280    LOGV("Create new client(%d) from pid %d, fd=%d, offset=%lld, length=%lld",
281            connId, pid, fd, offset, length);
282    if (NO_ERROR != c->setDataSource(fd, offset, length)) {
283        c.clear();
284    } else {
285        wp<Client> w = c;
286        Mutex::Autolock lock(mLock);
287        mClients.add(w);
288    }
289    ::close(fd);
290    return c;
291}
292
293sp<IOMX> MediaPlayerService::getOMX() {
294    Mutex::Autolock autoLock(mLock);
295
296    if (mOMX.get() == NULL) {
297        mOMX = new OMX;
298    }
299
300    return mOMX;
301}
302
303status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
304{
305    const size_t SIZE = 256;
306    char buffer[SIZE];
307    String8 result;
308
309    result.append(" AudioCache\n");
310    if (mHeap != 0) {
311        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
312                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
313        result.append(buffer);
314    }
315    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
316            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
317    result.append(buffer);
318    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
319            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
320    result.append(buffer);
321    ::write(fd, result.string(), result.size());
322    return NO_ERROR;
323}
324
325status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
326{
327    const size_t SIZE = 256;
328    char buffer[SIZE];
329    String8 result;
330
331    result.append(" AudioOutput\n");
332    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
333            mStreamType, mLeftVolume, mRightVolume);
334    result.append(buffer);
335    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
336            mMsecsPerFrame, mLatency);
337    result.append(buffer);
338    ::write(fd, result.string(), result.size());
339    if (mTrack != 0) {
340        mTrack->dump(fd, args);
341    }
342    return NO_ERROR;
343}
344
345status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
346{
347    const size_t SIZE = 256;
348    char buffer[SIZE];
349    String8 result;
350    result.append(" Client\n");
351    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
352            mPid, mConnId, mStatus, mLoop?"true": "false");
353    result.append(buffer);
354    write(fd, result.string(), result.size());
355    if (mAudioOutput != 0) {
356        mAudioOutput->dump(fd, args);
357    }
358    write(fd, "\n", 1);
359    return NO_ERROR;
360}
361
362static int myTid() {
363#ifdef HAVE_GETTID
364    return gettid();
365#else
366    return getpid();
367#endif
368}
369
370#if defined(__arm__)
371extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
372        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
373extern "C" void free_malloc_leak_info(uint8_t* info);
374
375// Use the String-class below instead of String8 to allocate all memory
376// beforehand and not reenter the heap while we are examining it...
377struct MyString8 {
378    static const size_t MAX_SIZE = 256 * 1024;
379
380    MyString8()
381        : mPtr((char *)malloc(MAX_SIZE)) {
382        *mPtr = '\0';
383    }
384
385    ~MyString8() {
386        free(mPtr);
387    }
388
389    void append(const char *s) {
390        strcat(mPtr, s);
391    }
392
393    const char *string() const {
394        return mPtr;
395    }
396
397    size_t size() const {
398        return strlen(mPtr);
399    }
400
401private:
402    char *mPtr;
403
404    MyString8(const MyString8 &);
405    MyString8 &operator=(const MyString8 &);
406};
407
408void memStatus(int fd, const Vector<String16>& args)
409{
410    const size_t SIZE = 256;
411    char buffer[SIZE];
412    MyString8 result;
413
414    typedef struct {
415        size_t size;
416        size_t dups;
417        intptr_t * backtrace;
418    } AllocEntry;
419
420    uint8_t *info = NULL;
421    size_t overallSize = 0;
422    size_t infoSize = 0;
423    size_t totalMemory = 0;
424    size_t backtraceSize = 0;
425
426    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
427    if (info) {
428        uint8_t *ptr = info;
429        size_t count = overallSize / infoSize;
430
431        snprintf(buffer, SIZE, " Allocation count %i\n", count);
432        result.append(buffer);
433        snprintf(buffer, SIZE, " Total memory %i\n", totalMemory);
434        result.append(buffer);
435
436        AllocEntry * entries = new AllocEntry[count];
437
438        for (size_t i = 0; i < count; i++) {
439            // Each entry should be size_t, size_t, intptr_t[backtraceSize]
440            AllocEntry *e = &entries[i];
441
442            e->size = *reinterpret_cast<size_t *>(ptr);
443            ptr += sizeof(size_t);
444
445            e->dups = *reinterpret_cast<size_t *>(ptr);
446            ptr += sizeof(size_t);
447
448            e->backtrace = reinterpret_cast<intptr_t *>(ptr);
449            ptr += sizeof(intptr_t) * backtraceSize;
450        }
451
452        // Now we need to sort the entries.  They come sorted by size but
453        // not by stack trace which causes problems using diff.
454        bool moved;
455        do {
456            moved = false;
457            for (size_t i = 0; i < (count - 1); i++) {
458                AllocEntry *e1 = &entries[i];
459                AllocEntry *e2 = &entries[i+1];
460
461                bool swap = e1->size < e2->size;
462                if (e1->size == e2->size) {
463                    for(size_t j = 0; j < backtraceSize; j++) {
464                        if (e1->backtrace[j] == e2->backtrace[j]) {
465                            continue;
466                        }
467                        swap = e1->backtrace[j] < e2->backtrace[j];
468                        break;
469                    }
470                }
471                if (swap) {
472                    AllocEntry t = entries[i];
473                    entries[i] = entries[i+1];
474                    entries[i+1] = t;
475                    moved = true;
476                }
477            }
478        } while (moved);
479
480        for (size_t i = 0; i < count; i++) {
481            AllocEntry *e = &entries[i];
482
483            snprintf(buffer, SIZE, "size %8i, dup %4i, ", e->size, e->dups);
484            result.append(buffer);
485            for (size_t ct = 0; (ct < backtraceSize) && e->backtrace[ct]; ct++) {
486                if (ct) {
487                    result.append(", ");
488                }
489                snprintf(buffer, SIZE, "0x%08x", e->backtrace[ct]);
490                result.append(buffer);
491            }
492            result.append("\n");
493        }
494
495        delete[] entries;
496        free_malloc_leak_info(info);
497    }
498
499    write(fd, result.string(), result.size());
500}
501#endif
502
503status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
504{
505    const size_t SIZE = 256;
506    char buffer[SIZE];
507    String8 result;
508    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
509        snprintf(buffer, SIZE, "Permission Denial: "
510                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
511                IPCThreadState::self()->getCallingPid(),
512                IPCThreadState::self()->getCallingUid());
513        result.append(buffer);
514    } else {
515        Mutex::Autolock lock(mLock);
516        for (int i = 0, n = mClients.size(); i < n; ++i) {
517            sp<Client> c = mClients[i].promote();
518            if (c != 0) c->dump(fd, args);
519        }
520        for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
521            result.append(" MediaRecorderClient\n");
522            sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
523            snprintf(buffer, 255, "  pid(%d)\n\n", c->mPid);
524            result.append(buffer);
525        }
526
527        result.append(" Files opened and/or mapped:\n");
528        snprintf(buffer, SIZE, "/proc/%d/maps", myTid());
529        FILE *f = fopen(buffer, "r");
530        if (f) {
531            while (!feof(f)) {
532                fgets(buffer, SIZE, f);
533                if (strstr(buffer, " /sdcard/") ||
534                    strstr(buffer, " /system/sounds/") ||
535                    strstr(buffer, " /system/media/")) {
536                    result.append("  ");
537                    result.append(buffer);
538                }
539            }
540            fclose(f);
541        } else {
542            result.append("couldn't open ");
543            result.append(buffer);
544            result.append("\n");
545        }
546
547        snprintf(buffer, SIZE, "/proc/%d/fd", myTid());
548        DIR *d = opendir(buffer);
549        if (d) {
550            struct dirent *ent;
551            while((ent = readdir(d)) != NULL) {
552                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
553                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", myTid(), ent->d_name);
554                    struct stat s;
555                    if (lstat(buffer, &s) == 0) {
556                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
557                            char linkto[256];
558                            int len = readlink(buffer, linkto, sizeof(linkto));
559                            if(len > 0) {
560                                if(len > 255) {
561                                    linkto[252] = '.';
562                                    linkto[253] = '.';
563                                    linkto[254] = '.';
564                                    linkto[255] = 0;
565                                } else {
566                                    linkto[len] = 0;
567                                }
568                                if (strstr(linkto, "/sdcard/") == linkto ||
569                                    strstr(linkto, "/system/sounds/") == linkto ||
570                                    strstr(linkto, "/system/media/") == linkto) {
571                                    result.append("  ");
572                                    result.append(buffer);
573                                    result.append(" -> ");
574                                    result.append(linkto);
575                                    result.append("\n");
576                                }
577                            }
578                        } else {
579                            result.append("  unexpected type for ");
580                            result.append(buffer);
581                            result.append("\n");
582                        }
583                    }
584                }
585            }
586            closedir(d);
587        } else {
588            result.append("couldn't open ");
589            result.append(buffer);
590            result.append("\n");
591        }
592
593#if defined(__arm__)
594        bool dumpMem = false;
595        for (size_t i = 0; i < args.size(); i++) {
596            if (args[i] == String16("-m")) {
597                dumpMem = true;
598            }
599        }
600        if (dumpMem) {
601            memStatus(fd, args);
602        }
603#endif
604    }
605    write(fd, result.string(), result.size());
606    return NO_ERROR;
607}
608
609void MediaPlayerService::removeClient(wp<Client> client)
610{
611    Mutex::Autolock lock(mLock);
612    mClients.remove(client);
613}
614
615MediaPlayerService::Client::Client(const sp<MediaPlayerService>& service, pid_t pid,
616        int32_t connId, const sp<IMediaPlayerClient>& client)
617{
618    LOGV("Client(%d) constructor", connId);
619    mPid = pid;
620    mConnId = connId;
621    mService = service;
622    mClient = client;
623    mLoop = false;
624    mStatus = NO_INIT;
625#if CALLBACK_ANTAGONIZER
626    LOGD("create Antagonizer");
627    mAntagonizer = new Antagonizer(notify, this);
628#endif
629}
630
631MediaPlayerService::Client::~Client()
632{
633    LOGV("Client(%d) destructor pid = %d", mConnId, mPid);
634    mAudioOutput.clear();
635    wp<Client> client(this);
636    disconnect();
637    mService->removeClient(client);
638}
639
640void MediaPlayerService::Client::disconnect()
641{
642    LOGV("disconnect(%d) from pid %d", mConnId, mPid);
643    // grab local reference and clear main reference to prevent future
644    // access to object
645    sp<MediaPlayerBase> p;
646    {
647        Mutex::Autolock l(mLock);
648        p = mPlayer;
649    }
650    mClient.clear();
651
652    mPlayer.clear();
653
654    // clear the notification to prevent callbacks to dead client
655    // and reset the player. We assume the player will serialize
656    // access to itself if necessary.
657    if (p != 0) {
658        p->setNotifyCallback(0, 0);
659#if CALLBACK_ANTAGONIZER
660        LOGD("kill Antagonizer");
661        mAntagonizer->kill();
662#endif
663        p->reset();
664    }
665
666    IPCThreadState::self()->flushCommands();
667}
668
669static player_type getDefaultPlayerType() {
670#if BUILD_WITH_FULL_STAGEFRIGHT
671    char value[PROPERTY_VALUE_MAX];
672    if (property_get("media.stagefright.enable-player", value, NULL)
673        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
674        return STAGEFRIGHT_PLAYER;
675    }
676#endif
677
678    return PV_PLAYER;
679}
680
681player_type getPlayerType(int fd, int64_t offset, int64_t length)
682{
683    char buf[20];
684    lseek(fd, offset, SEEK_SET);
685    read(fd, buf, sizeof(buf));
686    lseek(fd, offset, SEEK_SET);
687
688    long ident = *((long*)buf);
689
690    // Ogg vorbis?
691    if (ident == 0x5367674f) // 'OggS'
692        return VORBIS_PLAYER;
693
694#ifndef NO_OPENCORE
695    if (ident == 0x75b22630) {
696        // The magic number for .asf files, i.e. wmv and wma content.
697        // These are not currently supported through stagefright.
698        return PV_PLAYER;
699    }
700#endif
701
702    // Some kind of MIDI?
703    EAS_DATA_HANDLE easdata;
704    if (EAS_Init(&easdata) == EAS_SUCCESS) {
705        EAS_FILE locator;
706        locator.path = NULL;
707        locator.fd = fd;
708        locator.offset = offset;
709        locator.length = length;
710        EAS_HANDLE  eashandle;
711        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
712            EAS_CloseFile(easdata, eashandle);
713            EAS_Shutdown(easdata);
714            return SONIVOX_PLAYER;
715        }
716        EAS_Shutdown(easdata);
717    }
718
719    return getDefaultPlayerType();
720}
721
722player_type getPlayerType(const char* url)
723{
724    if (TestPlayerStub::canBeUsed(url)) {
725        return TEST_PLAYER;
726    }
727
728    // use MidiFile for MIDI extensions
729    int lenURL = strlen(url);
730    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
731        int len = strlen(FILE_EXTS[i].extension);
732        int start = lenURL - len;
733        if (start > 0) {
734            if (!strncmp(url + start, FILE_EXTS[i].extension, len)) {
735                return FILE_EXTS[i].playertype;
736            }
737        }
738    }
739
740    if (!strncasecmp(url, "http://", 7)) {
741        char value[PROPERTY_VALUE_MAX];
742        if (!property_get("media.stagefright.enable-http", value, NULL)
743            || (strcmp(value, "1") && strcasecmp(value, "true"))) {
744            // For now, we're going to use PV for http-based playback
745            // by default until we can clear up a few more issues.
746            return PV_PLAYER;
747        }
748    }
749
750    return getDefaultPlayerType();
751}
752
753static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
754        notify_callback_f notifyFunc)
755{
756    sp<MediaPlayerBase> p;
757    switch (playerType) {
758#ifndef NO_OPENCORE
759        case PV_PLAYER:
760            LOGV(" create PVPlayer");
761            p = new PVPlayer();
762            break;
763#endif
764        case SONIVOX_PLAYER:
765            LOGV(" create MidiFile");
766            p = new MidiFile();
767            break;
768        case VORBIS_PLAYER:
769            LOGV(" create VorbisPlayer");
770            p = new VorbisPlayer();
771            break;
772#if BUILD_WITH_FULL_STAGEFRIGHT
773        case STAGEFRIGHT_PLAYER:
774            LOGV(" create StagefrightPlayer");
775            p = new StagefrightPlayer;
776            break;
777#endif
778        case TEST_PLAYER:
779            LOGV("Create Test Player stub");
780            p = new TestPlayerStub();
781            break;
782    }
783    if (p != NULL) {
784        if (p->initCheck() == NO_ERROR) {
785            p->setNotifyCallback(cookie, notifyFunc);
786        } else {
787            p.clear();
788        }
789    }
790    if (p == NULL) {
791        LOGE("Failed to create player object");
792    }
793    return p;
794}
795
796sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
797{
798    // determine if we have the right player type
799    sp<MediaPlayerBase> p = mPlayer;
800    if ((p != NULL) && (p->playerType() != playerType)) {
801        LOGV("delete player");
802        p.clear();
803    }
804    if (p == NULL) {
805        p = android::createPlayer(playerType, this, notify);
806    }
807    return p;
808}
809
810status_t MediaPlayerService::Client::setDataSource(
811        const char *url, const KeyedVector<String8, String8> *headers)
812{
813    LOGV("setDataSource(%s)", url);
814    if (url == NULL)
815        return UNKNOWN_ERROR;
816
817    if (strncmp(url, "content://", 10) == 0) {
818        // get a filedescriptor for the content Uri and
819        // pass it to the setDataSource(fd) method
820
821        String16 url16(url);
822        int fd = android::openContentProviderFile(url16);
823        if (fd < 0)
824        {
825            LOGE("Couldn't open fd for %s", url);
826            return UNKNOWN_ERROR;
827        }
828        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
829        close(fd);
830        return mStatus;
831    } else {
832        player_type playerType = getPlayerType(url);
833        LOGV("player type = %d", playerType);
834
835        // create the right type of player
836        sp<MediaPlayerBase> p = createPlayer(playerType);
837        if (p == NULL) return NO_INIT;
838
839        if (!p->hardwareOutput()) {
840            mAudioOutput = new AudioOutput();
841            static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
842        }
843
844        // now set data source
845        LOGV(" setDataSource");
846        mStatus = p->setDataSource(url, headers);
847        if (mStatus == NO_ERROR) {
848            mPlayer = p;
849        } else {
850            LOGE("  error: %d", mStatus);
851        }
852        return mStatus;
853    }
854}
855
856status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
857{
858    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
859    struct stat sb;
860    int ret = fstat(fd, &sb);
861    if (ret != 0) {
862        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
863        return UNKNOWN_ERROR;
864    }
865
866    LOGV("st_dev  = %llu", sb.st_dev);
867    LOGV("st_mode = %u", sb.st_mode);
868    LOGV("st_uid  = %lu", sb.st_uid);
869    LOGV("st_gid  = %lu", sb.st_gid);
870    LOGV("st_size = %llu", sb.st_size);
871
872    if (offset >= sb.st_size) {
873        LOGE("offset error");
874        ::close(fd);
875        return UNKNOWN_ERROR;
876    }
877    if (offset + length > sb.st_size) {
878        length = sb.st_size - offset;
879        LOGV("calculated length = %lld", length);
880    }
881
882    player_type playerType = getPlayerType(fd, offset, length);
883    LOGV("player type = %d", playerType);
884
885    // create the right type of player
886    sp<MediaPlayerBase> p = createPlayer(playerType);
887    if (p == NULL) return NO_INIT;
888
889    if (!p->hardwareOutput()) {
890        mAudioOutput = new AudioOutput();
891        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
892    }
893
894    // now set data source
895    mStatus = p->setDataSource(fd, offset, length);
896    if (mStatus == NO_ERROR) mPlayer = p;
897    return mStatus;
898}
899
900status_t MediaPlayerService::Client::setVideoSurface(const sp<ISurface>& surface)
901{
902    LOGV("[%d] setVideoSurface(%p)", mConnId, surface.get());
903    sp<MediaPlayerBase> p = getPlayer();
904    if (p == 0) return UNKNOWN_ERROR;
905    return p->setVideoSurface(surface);
906}
907
908status_t MediaPlayerService::Client::invoke(const Parcel& request,
909                                            Parcel *reply)
910{
911    sp<MediaPlayerBase> p = getPlayer();
912    if (p == NULL) return UNKNOWN_ERROR;
913    return p->invoke(request, reply);
914}
915
916// This call doesn't need to access the native player.
917status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
918{
919    status_t status;
920    media::Metadata::Filter allow, drop;
921
922    if (unmarshallFilter(filter, &allow, &status) &&
923        unmarshallFilter(filter, &drop, &status)) {
924        Mutex::Autolock lock(mLock);
925
926        mMetadataAllow = allow;
927        mMetadataDrop = drop;
928    }
929    return status;
930}
931
932status_t MediaPlayerService::Client::getMetadata(
933        bool update_only, bool apply_filter, Parcel *reply)
934{
935    sp<MediaPlayerBase> player = getPlayer();
936    if (player == 0) return UNKNOWN_ERROR;
937
938    status_t status;
939    // Placeholder for the return code, updated by the caller.
940    reply->writeInt32(-1);
941
942    media::Metadata::Filter ids;
943
944    // We don't block notifications while we fetch the data. We clear
945    // mMetadataUpdated first so we don't lose notifications happening
946    // during the rest of this call.
947    {
948        Mutex::Autolock lock(mLock);
949        if (update_only) {
950            ids = mMetadataUpdated;
951        }
952        mMetadataUpdated.clear();
953    }
954
955    media::Metadata metadata(reply);
956
957    metadata.appendHeader();
958    status = player->getMetadata(ids, reply);
959
960    if (status != OK) {
961        metadata.resetParcel();
962        LOGE("getMetadata failed %d", status);
963        return status;
964    }
965
966    // FIXME: Implement filtering on the result. Not critical since
967    // filtering takes place on the update notifications already. This
968    // would be when all the metadata are fetch and a filter is set.
969
970    // Everything is fine, update the metadata length.
971    metadata.updateLength();
972    return OK;
973}
974
975status_t MediaPlayerService::Client::suspend() {
976    sp<MediaPlayerBase> p = getPlayer();
977    if (p == 0) return UNKNOWN_ERROR;
978
979    return p->suspend();
980}
981
982status_t MediaPlayerService::Client::resume() {
983    sp<MediaPlayerBase> p = getPlayer();
984    if (p == 0) return UNKNOWN_ERROR;
985
986    return p->resume();
987}
988
989status_t MediaPlayerService::Client::prepareAsync()
990{
991    LOGV("[%d] prepareAsync", mConnId);
992    sp<MediaPlayerBase> p = getPlayer();
993    if (p == 0) return UNKNOWN_ERROR;
994    status_t ret = p->prepareAsync();
995#if CALLBACK_ANTAGONIZER
996    LOGD("start Antagonizer");
997    if (ret == NO_ERROR) mAntagonizer->start();
998#endif
999    return ret;
1000}
1001
1002status_t MediaPlayerService::Client::start()
1003{
1004    LOGV("[%d] start", mConnId);
1005    sp<MediaPlayerBase> p = getPlayer();
1006    if (p == 0) return UNKNOWN_ERROR;
1007    p->setLooping(mLoop);
1008    return p->start();
1009}
1010
1011status_t MediaPlayerService::Client::stop()
1012{
1013    LOGV("[%d] stop", mConnId);
1014    sp<MediaPlayerBase> p = getPlayer();
1015    if (p == 0) return UNKNOWN_ERROR;
1016    return p->stop();
1017}
1018
1019status_t MediaPlayerService::Client::pause()
1020{
1021    LOGV("[%d] pause", mConnId);
1022    sp<MediaPlayerBase> p = getPlayer();
1023    if (p == 0) return UNKNOWN_ERROR;
1024    return p->pause();
1025}
1026
1027status_t MediaPlayerService::Client::isPlaying(bool* state)
1028{
1029    *state = false;
1030    sp<MediaPlayerBase> p = getPlayer();
1031    if (p == 0) return UNKNOWN_ERROR;
1032    *state = p->isPlaying();
1033    LOGV("[%d] isPlaying: %d", mConnId, *state);
1034    return NO_ERROR;
1035}
1036
1037status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
1038{
1039    LOGV("getCurrentPosition");
1040    sp<MediaPlayerBase> p = getPlayer();
1041    if (p == 0) return UNKNOWN_ERROR;
1042    status_t ret = p->getCurrentPosition(msec);
1043    if (ret == NO_ERROR) {
1044        LOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
1045    } else {
1046        LOGE("getCurrentPosition returned %d", ret);
1047    }
1048    return ret;
1049}
1050
1051status_t MediaPlayerService::Client::getDuration(int *msec)
1052{
1053    LOGV("getDuration");
1054    sp<MediaPlayerBase> p = getPlayer();
1055    if (p == 0) return UNKNOWN_ERROR;
1056    status_t ret = p->getDuration(msec);
1057    if (ret == NO_ERROR) {
1058        LOGV("[%d] getDuration = %d", mConnId, *msec);
1059    } else {
1060        LOGE("getDuration returned %d", ret);
1061    }
1062    return ret;
1063}
1064
1065status_t MediaPlayerService::Client::seekTo(int msec)
1066{
1067    LOGV("[%d] seekTo(%d)", mConnId, msec);
1068    sp<MediaPlayerBase> p = getPlayer();
1069    if (p == 0) return UNKNOWN_ERROR;
1070    return p->seekTo(msec);
1071}
1072
1073status_t MediaPlayerService::Client::reset()
1074{
1075    LOGV("[%d] reset", mConnId);
1076    sp<MediaPlayerBase> p = getPlayer();
1077    if (p == 0) return UNKNOWN_ERROR;
1078    return p->reset();
1079}
1080
1081status_t MediaPlayerService::Client::setAudioStreamType(int type)
1082{
1083    LOGV("[%d] setAudioStreamType(%d)", mConnId, type);
1084    // TODO: for hardware output, call player instead
1085    Mutex::Autolock l(mLock);
1086    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
1087    return NO_ERROR;
1088}
1089
1090status_t MediaPlayerService::Client::setLooping(int loop)
1091{
1092    LOGV("[%d] setLooping(%d)", mConnId, loop);
1093    mLoop = loop;
1094    sp<MediaPlayerBase> p = getPlayer();
1095    if (p != 0) return p->setLooping(loop);
1096    return NO_ERROR;
1097}
1098
1099status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
1100{
1101    LOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
1102    // TODO: for hardware output, call player instead
1103    Mutex::Autolock l(mLock);
1104    if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
1105    return NO_ERROR;
1106}
1107
1108
1109void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
1110{
1111    Client* client = static_cast<Client*>(cookie);
1112
1113    if (MEDIA_INFO == msg &&
1114        MEDIA_INFO_METADATA_UPDATE == ext1) {
1115        const media::Metadata::Type metadata_type = ext2;
1116
1117        if(client->shouldDropMetadata(metadata_type)) {
1118            return;
1119        }
1120
1121        // Update the list of metadata that have changed. getMetadata
1122        // also access mMetadataUpdated and clears it.
1123        client->addNewMetadataUpdate(metadata_type);
1124    }
1125    LOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
1126    client->mClient->notify(msg, ext1, ext2);
1127}
1128
1129
1130bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
1131{
1132    Mutex::Autolock lock(mLock);
1133
1134    if (findMetadata(mMetadataDrop, code)) {
1135        return true;
1136    }
1137
1138    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
1139        return false;
1140    } else {
1141        return true;
1142    }
1143}
1144
1145
1146void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
1147    Mutex::Autolock lock(mLock);
1148    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
1149        mMetadataUpdated.add(metadata_type);
1150    }
1151}
1152
1153#if CALLBACK_ANTAGONIZER
1154const int Antagonizer::interval = 10000; // 10 msecs
1155
1156Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
1157    mExit(false), mActive(false), mClient(client), mCb(cb)
1158{
1159    createThread(callbackThread, this);
1160}
1161
1162void Antagonizer::kill()
1163{
1164    Mutex::Autolock _l(mLock);
1165    mActive = false;
1166    mExit = true;
1167    mCondition.wait(mLock);
1168}
1169
1170int Antagonizer::callbackThread(void* user)
1171{
1172    LOGD("Antagonizer started");
1173    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
1174    while (!p->mExit) {
1175        if (p->mActive) {
1176            LOGV("send event");
1177            p->mCb(p->mClient, 0, 0, 0);
1178        }
1179        usleep(interval);
1180    }
1181    Mutex::Autolock _l(p->mLock);
1182    p->mCondition.signal();
1183    LOGD("Antagonizer stopped");
1184    return 0;
1185}
1186#endif
1187
1188static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
1189
1190sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1191{
1192    LOGV("decode(%s)", url);
1193    sp<MemoryBase> mem;
1194    sp<MediaPlayerBase> player;
1195
1196    // Protect our precious, precious DRMd ringtones by only allowing
1197    // decoding of http, but not filesystem paths or content Uris.
1198    // If the application wants to decode those, it should open a
1199    // filedescriptor for them and use that.
1200    if (url != NULL && strncmp(url, "http://", 7) != 0) {
1201        LOGD("Can't decode %s by path, use filedescriptor instead", url);
1202        return mem;
1203    }
1204
1205    player_type playerType = getPlayerType(url);
1206    LOGV("player type = %d", playerType);
1207
1208    // create the right type of player
1209    sp<AudioCache> cache = new AudioCache(url);
1210    player = android::createPlayer(playerType, cache.get(), cache->notify);
1211    if (player == NULL) goto Exit;
1212    if (player->hardwareOutput()) goto Exit;
1213
1214    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1215
1216    // set data source
1217    if (player->setDataSource(url) != NO_ERROR) goto Exit;
1218
1219    LOGV("prepare");
1220    player->prepareAsync();
1221
1222    LOGV("wait for prepare");
1223    if (cache->wait() != NO_ERROR) goto Exit;
1224
1225    LOGV("start");
1226    player->start();
1227
1228    LOGV("wait for playback complete");
1229    if (cache->wait() != NO_ERROR) goto Exit;
1230
1231    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1232    *pSampleRate = cache->sampleRate();
1233    *pNumChannels = cache->channelCount();
1234    *pFormat = cache->format();
1235    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1236
1237Exit:
1238    if (player != 0) player->reset();
1239    return mem;
1240}
1241
1242sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
1243{
1244    LOGV("decode(%d, %lld, %lld)", fd, offset, length);
1245    sp<MemoryBase> mem;
1246    sp<MediaPlayerBase> player;
1247
1248    player_type playerType = getPlayerType(fd, offset, length);
1249    LOGV("player type = %d", playerType);
1250
1251    // create the right type of player
1252    sp<AudioCache> cache = new AudioCache("decode_fd");
1253    player = android::createPlayer(playerType, cache.get(), cache->notify);
1254    if (player == NULL) goto Exit;
1255    if (player->hardwareOutput()) goto Exit;
1256
1257    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
1258
1259    // set data source
1260    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
1261
1262    LOGV("prepare");
1263    player->prepareAsync();
1264
1265    LOGV("wait for prepare");
1266    if (cache->wait() != NO_ERROR) goto Exit;
1267
1268    LOGV("start");
1269    player->start();
1270
1271    LOGV("wait for playback complete");
1272    if (cache->wait() != NO_ERROR) goto Exit;
1273
1274    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
1275    *pSampleRate = cache->sampleRate();
1276    *pNumChannels = cache->channelCount();
1277    *pFormat = cache->format();
1278    LOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
1279
1280Exit:
1281    if (player != 0) player->reset();
1282    ::close(fd);
1283    return mem;
1284}
1285
1286/*
1287 * Avert your eyes, ugly hack ahead.
1288 * The following is to support music visualizations.
1289 */
1290
1291static const int NUMVIZBUF = 32;
1292static const int VIZBUFFRAMES = 1024;
1293static const int BUFTIMEMSEC = NUMVIZBUF * VIZBUFFRAMES * 1000 / 44100;
1294static const int TOTALBUFTIMEMSEC = NUMVIZBUF * BUFTIMEMSEC;
1295
1296static bool gotMem = false;
1297static sp<MemoryHeapBase> heap;
1298static sp<MemoryBase> mem[NUMVIZBUF];
1299static uint64_t endTime;
1300static uint64_t lastReadTime;
1301static uint64_t lastWriteTime;
1302static int writeIdx = 0;
1303
1304static void allocVizBufs() {
1305    if (!gotMem) {
1306        heap = new MemoryHeapBase(NUMVIZBUF * VIZBUFFRAMES * 2, 0, "snooper");
1307        for (int i=0;i<NUMVIZBUF;i++) {
1308            mem[i] = new MemoryBase(heap, VIZBUFFRAMES * 2 * i, VIZBUFFRAMES * 2);
1309        }
1310        endTime = 0;
1311        gotMem = true;
1312    }
1313}
1314
1315
1316/*
1317 * Get a buffer of audio data that is about to be played.
1318 * We don't synchronize this because in practice the writer
1319 * is ahead of the reader, and even if we did happen to catch
1320 * a buffer while it's being written, it's just a visualization,
1321 * so no harm done.
1322 */
1323static sp<MemoryBase> getVizBuffer() {
1324
1325    allocVizBufs();
1326
1327    lastReadTime = uptimeMillis();
1328
1329    // if there is no recent buffer (yet), just return empty handed
1330    if (lastWriteTime + TOTALBUFTIMEMSEC < lastReadTime) {
1331        //LOGI("@@@@    no audio data to look at yet: %d + %d < %d", (int)lastWriteTime, TOTALBUFTIMEMSEC, (int)lastReadTime);
1332        return NULL;
1333    }
1334
1335    int timedelta = endTime - lastReadTime;
1336    if (timedelta < 0) timedelta = 0;
1337    int framedelta = timedelta * 44100 / 1000;
1338    int headIdx = (writeIdx - framedelta) / VIZBUFFRAMES - 1;
1339    while (headIdx < 0) {
1340        headIdx += NUMVIZBUF;
1341    }
1342    return mem[headIdx];
1343}
1344
1345// Append the data to the vizualization buffer
1346static void makeVizBuffers(const char *data, int len, uint64_t time) {
1347
1348    allocVizBufs();
1349
1350    uint64_t startTime = time;
1351    const int frameSize = 4; // 16 bit stereo sample is 4 bytes
1352    int offset = writeIdx;
1353    int maxoff = heap->getSize() / 2; // in shorts
1354    short *base = (short*)heap->getBase();
1355    short *src = (short*)data;
1356    while (len > 0) {
1357
1358        // Degrade quality by mixing to mono and clearing the lowest 3 bits.
1359        // This should still be good enough for a visualization
1360        base[offset++] = ((int(src[0]) + int(src[1])) >> 1) & ~0x7;
1361        src += 2;
1362        len -= frameSize;
1363        if (offset >= maxoff) {
1364            offset = 0;
1365        }
1366    }
1367    writeIdx = offset;
1368    endTime = time + (len / frameSize) / 44;
1369    //LOGI("@@@ stored buffers from %d to %d", uint32_t(startTime), uint32_t(time));
1370}
1371
1372sp<IMemory> MediaPlayerService::snoop()
1373{
1374    sp<MemoryBase> mem = getVizBuffer();
1375    return mem;
1376}
1377
1378
1379#undef LOG_TAG
1380#define LOG_TAG "AudioSink"
1381MediaPlayerService::AudioOutput::AudioOutput()
1382    : mCallback(NULL),
1383      mCallbackCookie(NULL) {
1384    mTrack = 0;
1385    mStreamType = AudioSystem::MUSIC;
1386    mLeftVolume = 1.0;
1387    mRightVolume = 1.0;
1388    mLatency = 0;
1389    mMsecsPerFrame = 0;
1390    mNumFramesWritten = 0;
1391    setMinBufferCount();
1392}
1393
1394MediaPlayerService::AudioOutput::~AudioOutput()
1395{
1396    close();
1397}
1398
1399void MediaPlayerService::AudioOutput::setMinBufferCount()
1400{
1401    char value[PROPERTY_VALUE_MAX];
1402    if (property_get("ro.kernel.qemu", value, 0)) {
1403        mIsOnEmulator = true;
1404        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
1405    }
1406}
1407
1408bool MediaPlayerService::AudioOutput::isOnEmulator()
1409{
1410    setMinBufferCount();
1411    return mIsOnEmulator;
1412}
1413
1414int MediaPlayerService::AudioOutput::getMinBufferCount()
1415{
1416    setMinBufferCount();
1417    return mMinBufferCount;
1418}
1419
1420ssize_t MediaPlayerService::AudioOutput::bufferSize() const
1421{
1422    if (mTrack == 0) return NO_INIT;
1423    return mTrack->frameCount() * frameSize();
1424}
1425
1426ssize_t MediaPlayerService::AudioOutput::frameCount() const
1427{
1428    if (mTrack == 0) return NO_INIT;
1429    return mTrack->frameCount();
1430}
1431
1432ssize_t MediaPlayerService::AudioOutput::channelCount() const
1433{
1434    if (mTrack == 0) return NO_INIT;
1435    return mTrack->channelCount();
1436}
1437
1438ssize_t MediaPlayerService::AudioOutput::frameSize() const
1439{
1440    if (mTrack == 0) return NO_INIT;
1441    return mTrack->frameSize();
1442}
1443
1444uint32_t MediaPlayerService::AudioOutput::latency () const
1445{
1446    return mLatency;
1447}
1448
1449float MediaPlayerService::AudioOutput::msecsPerFrame() const
1450{
1451    return mMsecsPerFrame;
1452}
1453
1454status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position)
1455{
1456    if (mTrack == 0) return NO_INIT;
1457    return mTrack->getPosition(position);
1458}
1459
1460status_t MediaPlayerService::AudioOutput::open(
1461        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1462        AudioCallback cb, void *cookie)
1463{
1464    mCallback = cb;
1465    mCallbackCookie = cookie;
1466
1467    // Check argument "bufferCount" against the mininum buffer count
1468    if (bufferCount < mMinBufferCount) {
1469        LOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
1470        bufferCount = mMinBufferCount;
1471
1472    }
1473    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1474    if (mTrack) close();
1475    int afSampleRate;
1476    int afFrameCount;
1477    int frameCount;
1478
1479    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
1480        return NO_INIT;
1481    }
1482    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
1483        return NO_INIT;
1484    }
1485
1486    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
1487
1488    AudioTrack *t;
1489    if (mCallback != NULL) {
1490        t = new AudioTrack(
1491                mStreamType,
1492                sampleRate,
1493                format,
1494                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1495                frameCount,
1496                0 /* flags */,
1497                CallbackWrapper,
1498                this);
1499    } else {
1500        t = new AudioTrack(
1501                mStreamType,
1502                sampleRate,
1503                format,
1504                (channelCount == 2) ? AudioSystem::CHANNEL_OUT_STEREO : AudioSystem::CHANNEL_OUT_MONO,
1505                frameCount);
1506    }
1507
1508    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
1509        LOGE("Unable to create audio track");
1510        delete t;
1511        return NO_INIT;
1512    }
1513
1514    LOGV("setVolume");
1515    t->setVolume(mLeftVolume, mRightVolume);
1516    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1517    mLatency = t->latency();
1518    mTrack = t;
1519    return NO_ERROR;
1520}
1521
1522void MediaPlayerService::AudioOutput::start()
1523{
1524    LOGV("start");
1525    if (mTrack) {
1526        mTrack->setVolume(mLeftVolume, mRightVolume);
1527        mTrack->start();
1528        mTrack->getPosition(&mNumFramesWritten);
1529    }
1530}
1531
1532void MediaPlayerService::AudioOutput::snoopWrite(const void* buffer, size_t size) {
1533    // Only make visualization buffers if anyone recently requested visualization data
1534    uint64_t now = uptimeMillis();
1535    if (lastReadTime + TOTALBUFTIMEMSEC >= now) {
1536        // Based on the current play counter, the number of frames written and
1537        // the current real time we can calculate the approximate real start
1538        // time of the buffer we're about to write.
1539        uint32_t pos;
1540        mTrack->getPosition(&pos);
1541
1542        // we're writing ahead by this many frames:
1543        int ahead = mNumFramesWritten - pos;
1544        //LOGI("@@@ written: %d, playpos: %d, latency: %d", mNumFramesWritten, pos, mTrack->latency());
1545        // which is this many milliseconds, assuming 44100 Hz:
1546        ahead /= 44;
1547
1548        makeVizBuffers((const char*)buffer, size, now + ahead + mTrack->latency());
1549        lastWriteTime = now;
1550    }
1551}
1552
1553
1554ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
1555{
1556    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
1557
1558    //LOGV("write(%p, %u)", buffer, size);
1559    if (mTrack) {
1560        snoopWrite(buffer, size);
1561        ssize_t ret = mTrack->write(buffer, size);
1562        mNumFramesWritten += ret / 4; // assume 16 bit stereo
1563        return ret;
1564    }
1565    return NO_INIT;
1566}
1567
1568void MediaPlayerService::AudioOutput::stop()
1569{
1570    LOGV("stop");
1571    if (mTrack) mTrack->stop();
1572    lastWriteTime = 0;
1573}
1574
1575void MediaPlayerService::AudioOutput::flush()
1576{
1577    LOGV("flush");
1578    if (mTrack) mTrack->flush();
1579}
1580
1581void MediaPlayerService::AudioOutput::pause()
1582{
1583    LOGV("pause");
1584    if (mTrack) mTrack->pause();
1585    lastWriteTime = 0;
1586}
1587
1588void MediaPlayerService::AudioOutput::close()
1589{
1590    LOGV("close");
1591    delete mTrack;
1592    mTrack = 0;
1593}
1594
1595void MediaPlayerService::AudioOutput::setVolume(float left, float right)
1596{
1597    LOGV("setVolume(%f, %f)", left, right);
1598    mLeftVolume = left;
1599    mRightVolume = right;
1600    if (mTrack) {
1601        mTrack->setVolume(left, right);
1602    }
1603}
1604
1605// static
1606void MediaPlayerService::AudioOutput::CallbackWrapper(
1607        int event, void *cookie, void *info) {
1608    //LOGV("callbackwrapper");
1609    if (event != AudioTrack::EVENT_MORE_DATA) {
1610        return;
1611    }
1612
1613    AudioOutput *me = (AudioOutput *)cookie;
1614    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
1615
1616    size_t actualSize = (*me->mCallback)(
1617            me, buffer->raw, buffer->size, me->mCallbackCookie);
1618
1619    buffer->size = actualSize;
1620
1621    if (actualSize > 0) {
1622        me->snoopWrite(buffer->raw, actualSize);
1623    }
1624}
1625
1626#undef LOG_TAG
1627#define LOG_TAG "AudioCache"
1628MediaPlayerService::AudioCache::AudioCache(const char* name) :
1629    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
1630    mError(NO_ERROR), mCommandComplete(false)
1631{
1632    // create ashmem heap
1633    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
1634}
1635
1636uint32_t MediaPlayerService::AudioCache::latency () const
1637{
1638    return 0;
1639}
1640
1641float MediaPlayerService::AudioCache::msecsPerFrame() const
1642{
1643    return mMsecsPerFrame;
1644}
1645
1646status_t MediaPlayerService::AudioCache::getPosition(uint32_t *position)
1647{
1648    if (position == 0) return BAD_VALUE;
1649    *position = mSize;
1650    return NO_ERROR;
1651}
1652
1653////////////////////////////////////////////////////////////////////////////////
1654
1655struct CallbackThread : public Thread {
1656    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
1657                   MediaPlayerBase::AudioSink::AudioCallback cb,
1658                   void *cookie);
1659
1660protected:
1661    virtual ~CallbackThread();
1662
1663    virtual bool threadLoop();
1664
1665private:
1666    wp<MediaPlayerBase::AudioSink> mSink;
1667    MediaPlayerBase::AudioSink::AudioCallback mCallback;
1668    void *mCookie;
1669    void *mBuffer;
1670    size_t mBufferSize;
1671
1672    CallbackThread(const CallbackThread &);
1673    CallbackThread &operator=(const CallbackThread &);
1674};
1675
1676CallbackThread::CallbackThread(
1677        const wp<MediaPlayerBase::AudioSink> &sink,
1678        MediaPlayerBase::AudioSink::AudioCallback cb,
1679        void *cookie)
1680    : mSink(sink),
1681      mCallback(cb),
1682      mCookie(cookie),
1683      mBuffer(NULL),
1684      mBufferSize(0) {
1685}
1686
1687CallbackThread::~CallbackThread() {
1688    if (mBuffer) {
1689        free(mBuffer);
1690        mBuffer = NULL;
1691    }
1692}
1693
1694bool CallbackThread::threadLoop() {
1695    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
1696    if (sink == NULL) {
1697        return false;
1698    }
1699
1700    if (mBuffer == NULL) {
1701        mBufferSize = sink->bufferSize();
1702        mBuffer = malloc(mBufferSize);
1703    }
1704
1705    size_t actualSize =
1706        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie);
1707
1708    if (actualSize > 0) {
1709        sink->write(mBuffer, actualSize);
1710    }
1711
1712    return true;
1713}
1714
1715////////////////////////////////////////////////////////////////////////////////
1716
1717status_t MediaPlayerService::AudioCache::open(
1718        uint32_t sampleRate, int channelCount, int format, int bufferCount,
1719        AudioCallback cb, void *cookie)
1720{
1721    LOGV("open(%u, %d, %d, %d)", sampleRate, channelCount, format, bufferCount);
1722    if (mHeap->getHeapID() < 0) {
1723        return NO_INIT;
1724    }
1725
1726    mSampleRate = sampleRate;
1727    mChannelCount = (uint16_t)channelCount;
1728    mFormat = (uint16_t)format;
1729    mMsecsPerFrame = 1.e3 / (float) sampleRate;
1730
1731    if (cb != NULL) {
1732        mCallbackThread = new CallbackThread(this, cb, cookie);
1733    }
1734    return NO_ERROR;
1735}
1736
1737void MediaPlayerService::AudioCache::start() {
1738    if (mCallbackThread != NULL) {
1739        mCallbackThread->run("AudioCache callback");
1740    }
1741}
1742
1743void MediaPlayerService::AudioCache::stop() {
1744    if (mCallbackThread != NULL) {
1745        mCallbackThread->requestExitAndWait();
1746    }
1747}
1748
1749ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
1750{
1751    LOGV("write(%p, %u)", buffer, size);
1752    if ((buffer == 0) || (size == 0)) return size;
1753
1754    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
1755    if (p == NULL) return NO_INIT;
1756    p += mSize;
1757    LOGV("memcpy(%p, %p, %u)", p, buffer, size);
1758    if (mSize + size > mHeap->getSize()) {
1759        LOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
1760        size = mHeap->getSize() - mSize;
1761    }
1762    memcpy(p, buffer, size);
1763    mSize += size;
1764    return size;
1765}
1766
1767// call with lock held
1768status_t MediaPlayerService::AudioCache::wait()
1769{
1770    Mutex::Autolock lock(mLock);
1771    while (!mCommandComplete) {
1772        mSignal.wait(mLock);
1773    }
1774    mCommandComplete = false;
1775
1776    if (mError == NO_ERROR) {
1777        LOGV("wait - success");
1778    } else {
1779        LOGV("wait - error");
1780    }
1781    return mError;
1782}
1783
1784void MediaPlayerService::AudioCache::notify(void* cookie, int msg, int ext1, int ext2)
1785{
1786    LOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
1787    AudioCache* p = static_cast<AudioCache*>(cookie);
1788
1789    // ignore buffering messages
1790    switch (msg)
1791    {
1792    case MEDIA_ERROR:
1793        LOGE("Error %d, %d occurred", ext1, ext2);
1794        p->mError = ext1;
1795        break;
1796    case MEDIA_PREPARED:
1797        LOGV("prepared");
1798        break;
1799    case MEDIA_PLAYBACK_COMPLETE:
1800        LOGV("playback complete");
1801        break;
1802    default:
1803        LOGV("ignored");
1804        return;
1805    }
1806
1807    // wake up thread
1808    Mutex::Autolock lock(mLock);
1809    p->mCommandComplete = true;
1810    p->mSignal.signal();
1811}
1812
1813} // namespace android
1814