mediaplayer.cpp revision 89fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5
1/* mediaplayer.cpp 2** 3** Copyright 2006, 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//#define LOG_NDEBUG 0 19#define LOG_TAG "MediaPlayer" 20#include <utils/Log.h> 21 22#include <sys/types.h> 23#include <sys/stat.h> 24#include <unistd.h> 25#include <fcntl.h> 26 27#include <utils/IServiceManager.h> 28#include <utils/IPCThreadState.h> 29 30#include <media/mediaplayer.h> 31#include <media/AudioTrack.h> 32 33#include <utils/MemoryBase.h> 34 35namespace android { 36 37// client singleton for binder interface to service 38Mutex MediaPlayer::sServiceLock; 39sp<IMediaPlayerService> MediaPlayer::sMediaPlayerService; 40sp<MediaPlayer::DeathNotifier> MediaPlayer::sDeathNotifier; 41SortedVector< wp<MediaPlayer> > MediaPlayer::sObitRecipients; 42 43// establish binder interface to service 44const sp<IMediaPlayerService>& MediaPlayer::getMediaPlayerService() 45{ 46 Mutex::Autolock _l(sServiceLock); 47 if (sMediaPlayerService.get() == 0) { 48 sp<IServiceManager> sm = defaultServiceManager(); 49 sp<IBinder> binder; 50 do { 51 binder = sm->getService(String16("media.player")); 52 if (binder != 0) 53 break; 54 LOGW("MediaPlayerService not published, waiting..."); 55 usleep(500000); // 0.5 s 56 } while(true); 57 if (sDeathNotifier == NULL) { 58 sDeathNotifier = new DeathNotifier(); 59 } 60 binder->linkToDeath(sDeathNotifier); 61 sMediaPlayerService = interface_cast<IMediaPlayerService>(binder); 62 } 63 LOGE_IF(sMediaPlayerService==0, "no MediaPlayerService!?"); 64 return sMediaPlayerService; 65} 66 67void MediaPlayer::addObitRecipient(const wp<MediaPlayer>& recipient) 68{ 69 Mutex::Autolock _l(sServiceLock); 70 sObitRecipients.add(recipient); 71} 72 73void MediaPlayer::removeObitRecipient(const wp<MediaPlayer>& recipient) 74{ 75 Mutex::Autolock _l(sServiceLock); 76 sObitRecipients.remove(recipient); 77} 78 79MediaPlayer::MediaPlayer() 80{ 81 LOGV("constructor"); 82 mListener = NULL; 83 mCookie = NULL; 84 mDuration = -1; 85 mStreamType = AudioSystem::MUSIC; 86 mCurrentPosition = -1; 87 mSeekPosition = -1; 88 mCurrentState = MEDIA_PLAYER_IDLE; 89 mPrepareSync = false; 90 mPrepareStatus = NO_ERROR; 91 mLoop = false; 92 mLeftVolume = mRightVolume = 1.0; 93 mVideoWidth = mVideoHeight = 0; 94} 95 96void MediaPlayer::onFirstRef() 97{ 98 addObitRecipient(this); 99} 100 101MediaPlayer::~MediaPlayer() 102{ 103 LOGV("destructor"); 104 removeObitRecipient(this); 105 disconnect(); 106 IPCThreadState::self()->flushCommands(); 107} 108 109void MediaPlayer::disconnect() 110{ 111 LOGV("disconnect"); 112 sp<IMediaPlayer> p; 113 { 114 Mutex::Autolock _l(mLock); 115 p = mPlayer; 116 mPlayer.clear(); 117 } 118 119 if (p != 0) { 120 p->disconnect(); 121 } 122} 123 124// always call with lock held 125void MediaPlayer::clear_l() 126{ 127 mDuration = -1; 128 mCurrentPosition = -1; 129 mSeekPosition = -1; 130 mVideoWidth = mVideoHeight = 0; 131} 132 133status_t MediaPlayer::setListener(const sp<MediaPlayerListener>& listener) 134{ 135 LOGV("setListener"); 136 Mutex::Autolock _l(mLock); 137 mListener = listener; 138 return NO_ERROR; 139} 140 141 142status_t MediaPlayer::setDataSource(const sp<IMediaPlayer>& player) 143{ 144 status_t err = UNKNOWN_ERROR; 145 sp<IMediaPlayer> p; 146 { // scope for the lock 147 Mutex::Autolock _l(mLock); 148 149 if ( !( mCurrentState & ( MEDIA_PLAYER_IDLE | MEDIA_PLAYER_STATE_ERROR ) ) ) { 150 LOGE("setDataSource called in state %d", mCurrentState); 151 return INVALID_OPERATION; 152 } 153 154 clear_l(); 155 p = mPlayer; 156 mPlayer = player; 157 if (player != 0) { 158 mCurrentState = MEDIA_PLAYER_INITIALIZED; 159 err = NO_ERROR; 160 } else { 161 LOGE("Unable to to create media player"); 162 } 163 } 164 165 if (p != 0) { 166 p->disconnect(); 167 } 168 169 return err; 170} 171 172status_t MediaPlayer::setDataSource(const char *url) 173{ 174 LOGV("setDataSource(%s)", url); 175 status_t err = BAD_VALUE; 176 if (url != NULL) { 177 const sp<IMediaPlayerService>& service(getMediaPlayerService()); 178 if (service != 0) { 179 sp<IMediaPlayer> player(service->create(getpid(), this, url)); 180 err = setDataSource(player); 181 } 182 } 183 return err; 184} 185 186status_t MediaPlayer::setDataSource(int fd, int64_t offset, int64_t length) 187{ 188 LOGV("setDataSource(%d, %lld, %lld)", fd, offset, length); 189 status_t err = UNKNOWN_ERROR; 190 const sp<IMediaPlayerService>& service(getMediaPlayerService()); 191 if (service != 0) { 192 sp<IMediaPlayer> player(service->create(getpid(), this, fd, offset, length)); 193 err = setDataSource(player); 194 } 195 return err; 196} 197 198status_t MediaPlayer::setVideoSurface(const sp<Surface>& surface) 199{ 200 LOGV("setVideoSurface"); 201 Mutex::Autolock _l(mLock); 202 if (mPlayer == 0) return NO_INIT; 203 return mPlayer->setVideoSurface(surface->getISurface()); 204} 205 206// must call with lock held 207status_t MediaPlayer::prepareAsync_l() 208{ 209 if ( (mPlayer != 0) && ( mCurrentState & ( MEDIA_PLAYER_INITIALIZED | MEDIA_PLAYER_STOPPED) ) ) { 210 mPlayer->setAudioStreamType(mStreamType); 211 mCurrentState = MEDIA_PLAYER_PREPARING; 212 return mPlayer->prepareAsync(); 213 } 214 LOGE("prepareAsync called in state %d", mCurrentState); 215 return INVALID_OPERATION; 216} 217 218status_t MediaPlayer::prepare() 219{ 220 LOGV("prepare"); 221 Mutex::Autolock _l(mLock); 222 if (mPrepareSync) return -EALREADY; 223 mPrepareSync = true; 224 status_t ret = prepareAsync_l(); 225 if (ret != NO_ERROR) return ret; 226 227 if (mPrepareSync) { 228 mSignal.wait(mLock); // wait for prepare done 229 mPrepareSync = false; 230 } 231 LOGV("prepare complete - status=%d", mPrepareStatus); 232 return mPrepareStatus; 233} 234 235status_t MediaPlayer::prepareAsync() 236{ 237 LOGV("prepareAsync"); 238 Mutex::Autolock _l(mLock); 239 return prepareAsync_l(); 240} 241 242status_t MediaPlayer::start() 243{ 244 LOGV("start"); 245 Mutex::Autolock _l(mLock); 246 if (mCurrentState & MEDIA_PLAYER_STARTED) 247 return NO_ERROR; 248 if ( (mPlayer != 0) && ( mCurrentState & ( MEDIA_PLAYER_PREPARED | 249 MEDIA_PLAYER_PLAYBACK_COMPLETE | MEDIA_PLAYER_PAUSED ) ) ) { 250 mPlayer->setLooping(mLoop); 251 mPlayer->setVolume(mLeftVolume, mRightVolume); 252 mCurrentState = MEDIA_PLAYER_STARTED; 253 status_t ret = mPlayer->start(); 254 if (ret != NO_ERROR) { 255 mCurrentState = MEDIA_PLAYER_STATE_ERROR; 256 } else { 257 if (mCurrentState == MEDIA_PLAYER_PLAYBACK_COMPLETE) { 258 LOGV("playback completed immediately following start()"); 259 } 260 } 261 return ret; 262 } 263 LOGE("start called in state %d", mCurrentState); 264 return INVALID_OPERATION; 265} 266 267status_t MediaPlayer::stop() 268{ 269 LOGV("stop"); 270 Mutex::Autolock _l(mLock); 271 if (mCurrentState & MEDIA_PLAYER_STOPPED) return NO_ERROR; 272 if ( (mPlayer != 0) && ( mCurrentState & ( MEDIA_PLAYER_STARTED | MEDIA_PLAYER_PREPARED | 273 MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_PLAYBACK_COMPLETE ) ) ) { 274 status_t ret = mPlayer->stop(); 275 if (ret != NO_ERROR) { 276 mCurrentState = MEDIA_PLAYER_STATE_ERROR; 277 } else { 278 mCurrentState = MEDIA_PLAYER_STOPPED; 279 } 280 return ret; 281 } 282 LOGE("stop called in state %d", mCurrentState); 283 return INVALID_OPERATION; 284} 285 286status_t MediaPlayer::pause() 287{ 288 LOGV("pause"); 289 Mutex::Autolock _l(mLock); 290 if (mCurrentState & MEDIA_PLAYER_PAUSED) 291 return NO_ERROR; 292 if ((mPlayer != 0) && (mCurrentState & MEDIA_PLAYER_STARTED)) { 293 status_t ret = mPlayer->pause(); 294 if (ret != NO_ERROR) { 295 mCurrentState = MEDIA_PLAYER_STATE_ERROR; 296 } else { 297 mCurrentState = MEDIA_PLAYER_PAUSED; 298 } 299 return ret; 300 } 301 LOGE("pause called in state %d", mCurrentState); 302 return INVALID_OPERATION; 303} 304 305bool MediaPlayer::isPlaying() 306{ 307 Mutex::Autolock _l(mLock); 308 if (mPlayer != 0) { 309 bool temp = false; 310 mPlayer->isPlaying(&temp); 311 LOGV("isPlaying: %d", temp); 312 if ((mCurrentState & MEDIA_PLAYER_STARTED) && ! temp) { 313 LOGE("internal/external state mismatch corrected"); 314 mCurrentState = MEDIA_PLAYER_PAUSED; 315 } 316 return temp; 317 } 318 LOGV("isPlaying: no active player"); 319 return false; 320} 321 322status_t MediaPlayer::getVideoWidth(int *w) 323{ 324 LOGV("getVideoWidth"); 325 Mutex::Autolock _l(mLock); 326 if (mPlayer == 0) return INVALID_OPERATION; 327 *w = mVideoWidth; 328 return NO_ERROR; 329} 330 331status_t MediaPlayer::getVideoHeight(int *h) 332{ 333 LOGV("getVideoHeight"); 334 Mutex::Autolock _l(mLock); 335 if (mPlayer == 0) return INVALID_OPERATION; 336 *h = mVideoHeight; 337 return NO_ERROR; 338} 339 340status_t MediaPlayer::getCurrentPosition(int *msec) 341{ 342 LOGV("getCurrentPosition"); 343 Mutex::Autolock _l(mLock); 344 if (mPlayer != 0) { 345 if (mCurrentPosition >= 0) { 346 LOGV("Using cached seek position: %d", mCurrentPosition); 347 *msec = mCurrentPosition; 348 return NO_ERROR; 349 } 350 return mPlayer->getCurrentPosition(msec); 351 } 352 return INVALID_OPERATION; 353} 354 355status_t MediaPlayer::getDuration_l(int *msec) 356{ 357 LOGV("getDuration"); 358 bool isValidState = (mCurrentState & (MEDIA_PLAYER_PREPARED | MEDIA_PLAYER_STARTED | MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_STOPPED | MEDIA_PLAYER_PLAYBACK_COMPLETE)); 359 if (mPlayer != 0 && isValidState) { 360 status_t ret = NO_ERROR; 361 if (mDuration <= 0) 362 ret = mPlayer->getDuration(&mDuration); 363 if (msec) 364 *msec = mDuration; 365 return ret; 366 } 367 LOGE("Attempt to call getDuration without a valid mediaplayer"); 368 return INVALID_OPERATION; 369} 370 371status_t MediaPlayer::getDuration(int *msec) 372{ 373 Mutex::Autolock _l(mLock); 374 return getDuration_l(msec); 375} 376 377status_t MediaPlayer::seekTo_l(int msec) 378{ 379 LOGV("seekTo %d", msec); 380 if ((mPlayer != 0) && ( mCurrentState & ( MEDIA_PLAYER_STARTED | MEDIA_PLAYER_PREPARED | MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_PLAYBACK_COMPLETE) ) ) { 381 if ( msec < 0 ) { 382 LOGW("Attempt to seek to invalid position: %d", msec); 383 msec = 0; 384 } else if ((mDuration > 0) && (msec > mDuration)) { 385 LOGW("Attempt to seek to past end of file: request = %d, EOF = %d", msec, mDuration); 386 msec = mDuration; 387 } 388 // cache duration 389 mCurrentPosition = msec; 390 if (mSeekPosition < 0) { 391 getDuration_l(NULL); 392 mSeekPosition = msec; 393 return mPlayer->seekTo(msec); 394 } 395 else { 396 LOGV("Seek in progress - queue up seekTo[%d]", msec); 397 return NO_ERROR; 398 } 399 } 400 LOGE("Attempt to perform seekTo in wrong state: mPlayer=%p, mCurrentState=%u", mPlayer.get(), mCurrentState); 401 return INVALID_OPERATION; 402} 403 404status_t MediaPlayer::seekTo(int msec) 405{ 406 Mutex::Autolock _l(mLock); 407 return seekTo_l(msec); 408} 409 410status_t MediaPlayer::reset() 411{ 412 LOGV("reset"); 413 Mutex::Autolock _l(mLock); 414 mLoop = false; 415 if (mCurrentState == MEDIA_PLAYER_IDLE) return NO_ERROR; 416 mPrepareSync = false; 417 if (mPlayer != 0) { 418 status_t ret = mPlayer->reset(); 419 if (ret != NO_ERROR) { 420 LOGE("reset() failed with return code (%d)", ret); 421 mCurrentState = MEDIA_PLAYER_STATE_ERROR; 422 } else { 423 mCurrentState = MEDIA_PLAYER_IDLE; 424 } 425 return ret; 426 } 427 clear_l(); 428 return NO_ERROR; 429} 430 431status_t MediaPlayer::setAudioStreamType(int type) 432{ 433 LOGV("MediaPlayer::setAudioStreamType"); 434 Mutex::Autolock _l(mLock); 435 if (mStreamType == type) return NO_ERROR; 436 if (mCurrentState & ( MEDIA_PLAYER_PREPARED | MEDIA_PLAYER_STARTED | 437 MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_PLAYBACK_COMPLETE ) ) { 438 // Can't change the stream type after prepare 439 LOGE("setAudioStream called in state %d", mCurrentState); 440 return INVALID_OPERATION; 441 } 442 // cache 443 mStreamType = type; 444 return OK; 445} 446 447status_t MediaPlayer::setLooping(int loop) 448{ 449 LOGV("MediaPlayer::setLooping"); 450 Mutex::Autolock _l(mLock); 451 mLoop = (loop != 0); 452 if (mPlayer != 0) { 453 return mPlayer->setLooping(loop); 454 } 455 return OK; 456} 457 458bool MediaPlayer::isLooping() { 459 LOGV("isLooping"); 460 Mutex::Autolock _l(mLock); 461 if (mPlayer != 0) { 462 return mLoop; 463 } 464 LOGV("isLooping: no active player"); 465 return false; 466} 467 468status_t MediaPlayer::setVolume(float leftVolume, float rightVolume) 469{ 470 LOGV("MediaPlayer::setVolume(%f, %f)", leftVolume, rightVolume); 471 Mutex::Autolock _l(mLock); 472 mLeftVolume = leftVolume; 473 mRightVolume = rightVolume; 474 if (mPlayer != 0) { 475 return mPlayer->setVolume(leftVolume, rightVolume); 476 } 477 return OK; 478} 479 480void MediaPlayer::notify(int msg, int ext1, int ext2) 481{ 482 LOGV("message received msg=%d, ext1=%d, ext2=%d", msg, ext1, ext2); 483 bool send = true; 484 485 // TODO: In the future, we might be on the same thread if the app is 486 // running in the same process as the media server. In that case, 487 // this will deadlock. 488 mLock.lock(); 489 if (mPlayer == 0) { 490 LOGV("notify(%d, %d, %d) callback on disconnected mediaplayer", msg, ext1, ext2); 491 mLock.unlock(); // release the lock when done. 492 return; 493 } 494 495 switch (msg) { 496 case MEDIA_NOP: // interface test message 497 break; 498 case MEDIA_PREPARED: 499 LOGV("prepared"); 500 mCurrentState = MEDIA_PLAYER_PREPARED; 501 if (mPrepareSync) { 502 LOGV("signal application thread"); 503 mPrepareSync = false; 504 mPrepareStatus = NO_ERROR; 505 mSignal.signal(); 506 } 507 break; 508 case MEDIA_PLAYBACK_COMPLETE: 509 LOGV("playback complete"); 510 if (!mLoop) { 511 mCurrentState = MEDIA_PLAYER_PLAYBACK_COMPLETE; 512 } 513 break; 514 case MEDIA_ERROR: 515 // Always log errors 516 LOGE("error (%d, %d)", ext1, ext2); 517 mCurrentState = MEDIA_PLAYER_STATE_ERROR; 518 if (mPrepareSync) 519 { 520 LOGV("signal application thread"); 521 mPrepareSync = false; 522 mPrepareStatus = ext1; 523 mSignal.signal(); 524 send = false; 525 } 526 break; 527 case MEDIA_SEEK_COMPLETE: 528 LOGV("Received seek complete"); 529 if (mSeekPosition != mCurrentPosition) { 530 LOGV("Executing queued seekTo(%d)", mSeekPosition); 531 mSeekPosition = -1; 532 seekTo_l(mCurrentPosition); 533 } 534 else { 535 LOGV("All seeks complete - return to regularly scheduled program"); 536 mCurrentPosition = mSeekPosition = -1; 537 } 538 break; 539 case MEDIA_BUFFERING_UPDATE: 540 LOGV("buffering %d", ext1); 541 break; 542 case MEDIA_SET_VIDEO_SIZE: 543 LOGV("New video size %d x %d", ext1, ext2); 544 mVideoWidth = ext1; 545 mVideoHeight = ext2; 546 break; 547 default: 548 LOGV("unrecognized message: (%d, %d, %d)", msg, ext1, ext2); 549 break; 550 } 551 552 sp<MediaPlayerListener> listener = mListener; 553 mLock.unlock(); 554 555 // this prevents re-entrant calls into client code 556 if ((listener != 0) && send) { 557 Mutex::Autolock _l(mNotifyLock); 558 LOGV("callback application"); 559 listener->notify(msg, ext1, ext2); 560 LOGV("back from callback"); 561 } 562} 563 564void MediaPlayer::DeathNotifier::binderDied(const wp<IBinder>& who) { 565 LOGW("MediaPlayer server died!"); 566 567 // Need to do this with the lock held 568 SortedVector< wp<MediaPlayer> > list; 569 { 570 Mutex::Autolock _l(MediaPlayer::sServiceLock); 571 MediaPlayer::sMediaPlayerService.clear(); 572 list = sObitRecipients; 573 } 574 575 // Notify application when media server dies. 576 // Don't hold the static lock during callback in case app 577 // makes a call that needs the lock. 578 size_t count = list.size(); 579 for (size_t iter = 0; iter < count; ++iter) { 580 sp<MediaPlayer> player = list[iter].promote(); 581 if ((player != 0) && (player->mPlayer != 0)) { 582 player->notify(MEDIA_ERROR, MEDIA_ERROR_SERVER_DIED, 0); 583 } 584 } 585} 586 587MediaPlayer::DeathNotifier::~DeathNotifier() 588{ 589 Mutex::Autolock _l(sServiceLock); 590 sObitRecipients.clear(); 591 if (sMediaPlayerService != 0) { 592 sMediaPlayerService->asBinder()->unlinkToDeath(this); 593 } 594} 595 596/*static*/ sp<IMemory> MediaPlayer::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 597{ 598 LOGV("decode(%s)", url); 599 sp<IMemory> p; 600 const sp<IMediaPlayerService>& service = getMediaPlayerService(); 601 if (service != 0) { 602 p = sMediaPlayerService->decode(url, pSampleRate, pNumChannels, pFormat); 603 } else { 604 LOGE("Unable to locate media service"); 605 } 606 return p; 607 608} 609 610/*static*/ sp<IMemory> MediaPlayer::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 611{ 612 LOGV("decode(%d, %lld, %lld)", fd, offset, length); 613 sp<IMemory> p; 614 const sp<IMediaPlayerService>& service = getMediaPlayerService(); 615 if (service != 0) { 616 p = sMediaPlayerService->decode(fd, offset, length, pSampleRate, pNumChannels, pFormat); 617 } else { 618 LOGE("Unable to locate media service"); 619 } 620 return p; 621 622} 623 624}; // namespace android 625