1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 //#define USE_LOG SLAndroidLogLevel_Verbose 18 19 #include "sles_allinclusive.h" 20 #include "android_StreamPlayer.h" 21 22 #include <media/IStreamSource.h> 23 #include <media/IMediaPlayerService.h> 24 #include <media/stagefright/foundation/ADebug.h> 25 #include <binder/IPCThreadState.h> 26 27 #include "mpeg2ts/ATSParser.h" 28 29 //-------------------------------------------------------------------------------------------------- 30 namespace android { 31 32 StreamSourceAppProxy::StreamSourceAppProxy( 33 IAndroidBufferQueue *androidBufferQueue, 34 const sp<CallbackProtector> &callbackProtector, 35 // sp<StreamPlayer> would cause StreamPlayer's destructor to run during it's own 36 // construction. If you pass in a sp<> to 'this' inside a constructor, then first the 37 // refcount is increased from 0 to 1, then decreased from 1 to 0, which causes the object's 38 // destructor to run from inside it's own constructor. 39 StreamPlayer * /* const sp<StreamPlayer> & */ player) : 40 mBuffersHasBeenSet(false), 41 mAndroidBufferQueue(androidBufferQueue), 42 mCallbackProtector(callbackProtector), 43 mPlayer(player) 44 { 45 SL_LOGV("StreamSourceAppProxy::StreamSourceAppProxy()"); 46 } 47 48 StreamSourceAppProxy::~StreamSourceAppProxy() { 49 SL_LOGV("StreamSourceAppProxy::~StreamSourceAppProxy()"); 50 disconnect(); 51 } 52 53 const SLuint32 StreamSourceAppProxy::kItemProcessed[NB_BUFFEREVENT_ITEM_FIELDS] = { 54 SL_ANDROID_ITEMKEY_BUFFERQUEUEEVENT, // item key 55 sizeof(SLuint32), // item size 56 SL_ANDROIDBUFFERQUEUEEVENT_PROCESSED // item data 57 }; 58 59 //-------------------------------------------------- 60 // IStreamSource implementation 61 void StreamSourceAppProxy::setListener(const sp<IStreamListener> &listener) { 62 assert(listener != NULL); 63 Mutex::Autolock _l(mLock); 64 assert(mListener == NULL); 65 mListener = listener; 66 } 67 68 void StreamSourceAppProxy::setBuffers(const Vector<sp<IMemory> > &buffers) { 69 Mutex::Autolock _l(mLock); 70 assert(!mBuffersHasBeenSet); 71 mBuffers = buffers; 72 mBuffersHasBeenSet = true; 73 } 74 75 void StreamSourceAppProxy::onBufferAvailable(size_t index) { 76 //SL_LOGD("StreamSourceAppProxy::onBufferAvailable(%d)", index); 77 78 { 79 Mutex::Autolock _l(mLock); 80 // assert not needed because if not set, size() will be zero and the CHECK_LT will also fail 81 // assert(mBuffersHasBeenSet); 82 CHECK_LT(index, mBuffers.size()); 83 #if 0 // enable if needed for debugging 84 sp<IMemory> mem = mBuffers.itemAt(index); 85 SLAint64 length = (SLAint64) mem->size(); 86 #endif 87 mAvailableBuffers.push_back(index); 88 //SL_LOGD("onBufferAvailable() now %d buffers available in queue", mAvailableBuffers.size()); 89 } 90 91 // a new shared mem buffer is available: let's try to fill immediately 92 pullFromBuffQueue(); 93 } 94 95 void StreamSourceAppProxy::receivedCmd_l(IStreamListener::Command cmd, const sp<AMessage> &msg) { 96 if (mListener != 0) { 97 mListener->issueCommand(cmd, false /* synchronous */, msg); 98 } 99 } 100 101 void StreamSourceAppProxy::receivedBuffer_l(size_t buffIndex, size_t buffLength) { 102 if (mListener != 0) { 103 mListener->queueBuffer(buffIndex, buffLength); 104 } 105 } 106 107 void StreamSourceAppProxy::disconnect() { 108 Mutex::Autolock _l(mLock); 109 mListener.clear(); 110 // Force binder to push the decremented reference count for sp<IStreamListener>. 111 // mediaserver and client both have sp<> to the other. When you decrement an sp<> 112 // reference count, binder doesn't push that to the other process immediately. 113 IPCThreadState::self()->flushCommands(); 114 mBuffers.clear(); 115 mBuffersHasBeenSet = false; 116 mAvailableBuffers.clear(); 117 } 118 119 //-------------------------------------------------- 120 // consumption from ABQ: pull from the ABQ, and push to shared memory (media server) 121 void StreamSourceAppProxy::pullFromBuffQueue() { 122 123 if (android::CallbackProtector::enterCbIfOk(mCallbackProtector)) { 124 125 size_t bufferId; 126 void* bufferLoc; 127 size_t buffSize; 128 129 slAndroidBufferQueueCallback callback = NULL; 130 void* pBufferContext, *pBufferData, *callbackPContext = NULL; 131 AdvancedBufferHeader *oldFront = NULL; 132 uint32_t dataSize /* , dataUsed */; 133 134 // retrieve data from the buffer queue 135 interface_lock_exclusive(mAndroidBufferQueue); 136 137 // can this read operation cause us to call the buffer queue callback 138 // (either because there was a command with no data, or all the data has been consumed) 139 bool queueCallbackCandidate = false; 140 141 if (mAndroidBufferQueue->mState.count != 0) { 142 // SL_LOGD("nbBuffers in ABQ = %u, buffSize=%u",abq->mState.count, buffSize); 143 assert(mAndroidBufferQueue->mFront != mAndroidBufferQueue->mRear); 144 145 oldFront = mAndroidBufferQueue->mFront; 146 AdvancedBufferHeader *newFront = &oldFront[1]; 147 148 // consume events when starting to read data from a buffer for the first time 149 if (oldFront->mDataSizeConsumed == 0) { 150 // note this code assumes at most one event per buffer; see IAndroidBufferQueue_Enqueue 151 if (oldFront->mItems.mTsCmdData.mTsCmdCode & ANDROID_MP2TSEVENT_EOS) { 152 receivedCmd_l(IStreamListener::EOS); 153 // EOS has no associated data 154 queueCallbackCandidate = true; 155 } else if (oldFront->mItems.mTsCmdData.mTsCmdCode & ANDROID_MP2TSEVENT_DISCONTINUITY) { 156 receivedCmd_l(IStreamListener::DISCONTINUITY); 157 } else if (oldFront->mItems.mTsCmdData.mTsCmdCode & ANDROID_MP2TSEVENT_DISCON_NEWPTS) { 158 sp<AMessage> msg = new AMessage(); 159 msg->setInt64(IStreamListener::kKeyResumeAtPTS, 160 (int64_t)oldFront->mItems.mTsCmdData.mPts); 161 receivedCmd_l(IStreamListener::DISCONTINUITY, msg /*msg*/); 162 } else if (oldFront->mItems.mTsCmdData.mTsCmdCode 163 & ANDROID_MP2TSEVENT_FORMAT_CHANGE_FULL) { 164 sp<AMessage> msg = new AMessage(); 165 msg->setInt32( 166 IStreamListener::kKeyDiscontinuityMask, 167 ATSParser::DISCONTINUITY_FORMATCHANGE); 168 receivedCmd_l(IStreamListener::DISCONTINUITY, msg /*msg*/); 169 } else if (oldFront->mItems.mTsCmdData.mTsCmdCode 170 & ANDROID_MP2TSEVENT_FORMAT_CHANGE_VIDEO) { 171 sp<AMessage> msg = new AMessage(); 172 msg->setInt32( 173 IStreamListener::kKeyDiscontinuityMask, 174 ATSParser::DISCONTINUITY_VIDEO_FORMAT); 175 receivedCmd_l(IStreamListener::DISCONTINUITY, msg /*msg*/); 176 } 177 // note that here we are intentionally only supporting 178 // ANDROID_MP2TSEVENT_FORMAT_CHANGE_VIDEO, see IAndroidBufferQueue.c 179 180 // some commands may introduce a time discontinuity, reevaluate position if needed 181 if (oldFront->mItems.mTsCmdData.mTsCmdCode & (ANDROID_MP2TSEVENT_DISCONTINUITY | 182 ANDROID_MP2TSEVENT_DISCON_NEWPTS | ANDROID_MP2TSEVENT_FORMAT_CHANGE_FULL)) { 183 const sp<StreamPlayer> player(mPlayer.promote()); 184 if (player != NULL) { 185 // FIXME see note at onSeek 186 player->seek(ANDROID_UNKNOWN_TIME); 187 } 188 } 189 oldFront->mItems.mTsCmdData.mTsCmdCode = ANDROID_MP2TSEVENT_NONE; 190 } 191 192 { 193 // we're going to change the shared mem buffer queue, so lock it 194 Mutex::Autolock _l(mLock); 195 if (!mAvailableBuffers.empty()) { 196 bufferId = *mAvailableBuffers.begin(); 197 CHECK_LT(bufferId, mBuffers.size()); 198 sp<IMemory> mem = mBuffers.itemAt(bufferId); 199 bufferLoc = mem->pointer(); 200 buffSize = mem->size(); 201 202 char *pSrc = ((char*)oldFront->mDataBuffer) + oldFront->mDataSizeConsumed; 203 if (oldFront->mDataSizeConsumed + buffSize < oldFront->mDataSize) { 204 // more available than requested, copy as much as requested 205 // consume data: 1/ copy to given destination 206 memcpy(bufferLoc, pSrc, buffSize); 207 // 2/ keep track of how much has been consumed 208 oldFront->mDataSizeConsumed += buffSize; 209 // 3/ notify shared mem listener that new data is available 210 receivedBuffer_l(bufferId, buffSize); 211 mAvailableBuffers.erase(mAvailableBuffers.begin()); 212 } else { 213 // requested as much available or more: consume the whole of the current 214 // buffer and move to the next 215 size_t consumed = oldFront->mDataSize - oldFront->mDataSizeConsumed; 216 //SL_LOGD("consuming rest of buffer: enqueueing=%u", consumed); 217 oldFront->mDataSizeConsumed = oldFront->mDataSize; 218 219 // move queue to next 220 if (newFront == &mAndroidBufferQueue-> 221 mBufferArray[mAndroidBufferQueue->mNumBuffers + 1]) { 222 // reached the end, circle back 223 newFront = mAndroidBufferQueue->mBufferArray; 224 } 225 mAndroidBufferQueue->mFront = newFront; 226 mAndroidBufferQueue->mState.count--; 227 mAndroidBufferQueue->mState.index++; 228 229 if (consumed > 0) { 230 // consume data: 1/ copy to given destination 231 memcpy(bufferLoc, pSrc, consumed); 232 // 2/ keep track of how much has been consumed 233 // here nothing to do because we are done with this buffer 234 // 3/ notify StreamPlayer that new data is available 235 receivedBuffer_l(bufferId, consumed); 236 mAvailableBuffers.erase(mAvailableBuffers.begin()); 237 } 238 239 // data has been consumed, and the buffer queue state has been updated 240 // we will notify the client if applicable 241 queueCallbackCandidate = true; 242 } 243 } 244 245 if (queueCallbackCandidate) { 246 if (mAndroidBufferQueue->mCallbackEventsMask & 247 SL_ANDROIDBUFFERQUEUEEVENT_PROCESSED) { 248 callback = mAndroidBufferQueue->mCallback; 249 // save callback data while under lock 250 callbackPContext = mAndroidBufferQueue->mContext; 251 pBufferContext = (void *)oldFront->mBufferContext; 252 pBufferData = (void *)oldFront->mDataBuffer; 253 dataSize = oldFront->mDataSize; 254 // here a buffer is only dequeued when fully consumed 255 //dataUsed = oldFront->mDataSizeConsumed; 256 } 257 } 258 //SL_LOGD("%d buffers available after reading from queue", mAvailableBuffers.size()); 259 if (!mAvailableBuffers.empty()) { 260 // there is still room in the shared memory, recheck later if we can pull 261 // data from the buffer queue and write it to shared memory 262 const sp<StreamPlayer> player(mPlayer.promote()); 263 if (player != NULL) { 264 player->queueRefilled(); 265 } 266 } 267 } 268 269 } else { // empty queue 270 SL_LOGD("ABQ empty, starving!"); 271 } 272 273 interface_unlock_exclusive(mAndroidBufferQueue); 274 275 // notify client of buffer processed 276 if (NULL != callback) { 277 SLresult result = (*callback)(&mAndroidBufferQueue->mItf, callbackPContext, 278 pBufferContext, pBufferData, dataSize, 279 dataSize, /* dataUsed */ 280 // no messages during playback other than marking the buffer as processed 281 (const SLAndroidBufferItem*)(&kItemProcessed) /* pItems */, 282 NB_BUFFEREVENT_ITEM_FIELDS *sizeof(SLuint32) /* itemsLength */ ); 283 if (SL_RESULT_SUCCESS != result) { 284 // Reserved for future use 285 SL_LOGW("Unsuccessful result %d returned from AndroidBufferQueueCallback", result); 286 } 287 } 288 289 mCallbackProtector->exitCb(); 290 } // enterCbIfOk 291 } 292 293 294 //-------------------------------------------------------------------------------------------------- 295 StreamPlayer::StreamPlayer(AudioPlayback_Parameters* params, bool hasVideo, 296 IAndroidBufferQueue *androidBufferQueue, const sp<CallbackProtector> &callbackProtector) : 297 GenericMediaPlayer(params, hasVideo), 298 mAppProxy(new StreamSourceAppProxy(androidBufferQueue, callbackProtector, this)), 299 mStopForDestroyCompleted(false) 300 { 301 SL_LOGD("StreamPlayer::StreamPlayer()"); 302 303 mPlaybackParams = *params; 304 305 } 306 307 StreamPlayer::~StreamPlayer() { 308 SL_LOGD("StreamPlayer::~StreamPlayer()"); 309 mAppProxy->disconnect(); 310 } 311 312 313 void StreamPlayer::onMessageReceived(const sp<AMessage> &msg) { 314 switch (msg->what()) { 315 case kWhatPullFromAbq: 316 onPullFromAndroidBufferQueue(); 317 break; 318 319 case kWhatStopForDestroy: 320 onStopForDestroy(); 321 break; 322 323 default: 324 GenericMediaPlayer::onMessageReceived(msg); 325 break; 326 } 327 } 328 329 330 void StreamPlayer::preDestroy() { 331 // FIXME NuPlayerDriver is currently not thread-safe, so stop() must be called by looper 332 (new AMessage(kWhatStopForDestroy, id()))->post(); 333 { 334 Mutex::Autolock _l(mStopForDestroyLock); 335 while (!mStopForDestroyCompleted) { 336 mStopForDestroyCondition.wait(mStopForDestroyLock); 337 } 338 } 339 // GenericMediaPlayer::preDestroy will repeat some of what we've done, but that's benign 340 GenericMediaPlayer::preDestroy(); 341 } 342 343 344 void StreamPlayer::onStopForDestroy() { 345 if (mPlayer != 0) { 346 mPlayer->stop(); 347 // causes CHECK failure in Nuplayer 348 //mPlayer->setDataSource(NULL); 349 mPlayer->setVideoSurfaceTexture(NULL); 350 mPlayer->disconnect(); 351 mPlayer.clear(); 352 { 353 // FIXME ugh make this a method 354 Mutex::Autolock _l(mPreparedPlayerLock); 355 mPreparedPlayer.clear(); 356 } 357 } 358 { 359 Mutex::Autolock _l(mStopForDestroyLock); 360 mStopForDestroyCompleted = true; 361 } 362 mStopForDestroyCondition.signal(); 363 } 364 365 366 /** 367 * Asynchronously notify the player that the queue is ready to be pulled from. 368 */ 369 void StreamPlayer::queueRefilled() { 370 // async notification that the ABQ was refilled: the player should pull from the ABQ, and 371 // and push to shared memory (to the media server) 372 (new AMessage(kWhatPullFromAbq, id()))->post(); 373 } 374 375 376 void StreamPlayer::appClear_l() { 377 // the user of StreamPlayer has cleared its AndroidBufferQueue: 378 // there's no clear() for the shared memory queue, so this is a no-op 379 } 380 381 382 //-------------------------------------------------- 383 // Event handlers 384 void StreamPlayer::onPrepare() { 385 SL_LOGD("StreamPlayer::onPrepare()"); 386 sp<IMediaPlayerService> mediaPlayerService(getMediaPlayerService()); 387 if (mediaPlayerService != NULL) { 388 mPlayer = mediaPlayerService->create(getpid(), mPlayerClient /*IMediaPlayerClient*/, 389 mPlaybackParams.sessionId); 390 if (mPlayer == NULL) { 391 SL_LOGE("media player service failed to create player by app proxy"); 392 } else if (mPlayer->setDataSource(mAppProxy /*IStreamSource*/) != NO_ERROR) { 393 SL_LOGE("setDataSource failed"); 394 mPlayer.clear(); 395 } 396 } 397 if (mPlayer == NULL) { 398 mStateFlags |= kFlagPreparedUnsuccessfully; 399 } 400 GenericMediaPlayer::onPrepare(); 401 SL_LOGD("StreamPlayer::onPrepare() done"); 402 } 403 404 405 void StreamPlayer::onPlay() { 406 SL_LOGD("StreamPlayer::onPlay()"); 407 // enqueue a message that will cause StreamAppProxy to consume from the queue (again if the 408 // player had starved the shared memory) 409 queueRefilled(); 410 411 GenericMediaPlayer::onPlay(); 412 } 413 414 415 void StreamPlayer::onPullFromAndroidBufferQueue() { 416 SL_LOGD("StreamPlayer::onPullFromAndroidBufferQueue()"); 417 mAppProxy->pullFromBuffQueue(); 418 } 419 420 } // namespace android 421
