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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "media/base/pipeline.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 #include <utility> | |
| 9 | |
| 10 #include "base/bind.h" | |
| 11 #include "base/bind_helpers.h" | |
| 12 #include "base/callback.h" | |
| 13 #include "base/callback_helpers.h" | |
| 14 #include "base/command_line.h" | |
| 15 #include "base/compiler_specific.h" | |
| 16 #include "base/location.h" | |
| 17 #include "base/metrics/histogram.h" | |
| 18 #include "base/single_thread_task_runner.h" | |
| 19 #include "base/stl_util.h" | |
| 20 #include "base/strings/string_number_conversions.h" | |
| 21 #include "base/strings/string_util.h" | |
| 22 #include "base/synchronization/condition_variable.h" | |
| 23 #include "media/base/media_log.h" | |
| 24 #include "media/base/media_switches.h" | |
| 25 #include "media/base/renderer.h" | |
| 26 #include "media/base/text_renderer.h" | |
| 27 #include "media/base/text_track_config.h" | |
| 28 #include "media/base/timestamp_constants.h" | |
| 29 #include "media/base/video_decoder_config.h" | |
| 30 | |
| 31 using base::TimeDelta; | |
| 32 | |
| 33 namespace media { | |
| 34 | |
| 35 Pipeline::Pipeline( | |
| 36 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, | |
| 37 MediaLog* media_log) | |
| 38 : task_runner_(task_runner), | |
| 39 media_log_(media_log), | |
| 40 running_(false), | |
| 41 did_loading_progress_(false), | |
| 42 volume_(1.0f), | |
| 43 playback_rate_(0.0), | |
| 44 status_(PIPELINE_OK), | |
| 45 state_(kCreated), | |
| 46 suspend_timestamp_(kNoTimestamp()), | |
| 47 renderer_ended_(false), | |
| 48 text_renderer_ended_(false), | |
| 49 demuxer_(NULL), | |
| 50 pending_cdm_context_(nullptr), | |
| 51 weak_factory_(this) { | |
| 52 media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(kCreated)); | |
| 53 } | |
| 54 | |
| 55 Pipeline::~Pipeline() { | |
| 56 DCHECK(thread_checker_.CalledOnValidThread()) | |
| 57 << "Pipeline must be destroyed on same thread that created it"; | |
| 58 DCHECK(!running_) << "Stop() must complete before destroying object"; | |
| 59 DCHECK(stop_cb_.is_null()); | |
| 60 DCHECK(seek_cb_.is_null()); | |
| 61 } | |
| 62 | |
| 63 void Pipeline::Start(Demuxer* demuxer, | |
| 64 scoped_ptr<Renderer> renderer, | |
| 65 const base::Closure& ended_cb, | |
| 66 const PipelineStatusCB& error_cb, | |
| 67 const PipelineStatusCB& seek_cb, | |
| 68 const PipelineMetadataCB& metadata_cb, | |
| 69 const BufferingStateCB& buffering_state_cb, | |
| 70 const base::Closure& duration_change_cb, | |
| 71 const AddTextTrackCB& add_text_track_cb, | |
| 72 const base::Closure& waiting_for_decryption_key_cb) { | |
| 73 DCHECK(!ended_cb.is_null()); | |
| 74 DCHECK(!error_cb.is_null()); | |
| 75 DCHECK(!seek_cb.is_null()); | |
| 76 DCHECK(!metadata_cb.is_null()); | |
| 77 DCHECK(!buffering_state_cb.is_null()); | |
| 78 | |
| 79 base::AutoLock auto_lock(lock_); | |
| 80 CHECK(!running_) << "Media pipeline is already running"; | |
| 81 running_ = true; | |
| 82 | |
| 83 demuxer_ = demuxer; | |
| 84 renderer_ = std::move(renderer); | |
| 85 ended_cb_ = ended_cb; | |
| 86 error_cb_ = error_cb; | |
| 87 seek_cb_ = seek_cb; | |
| 88 metadata_cb_ = metadata_cb; | |
| 89 buffering_state_cb_ = buffering_state_cb; | |
| 90 duration_change_cb_ = duration_change_cb; | |
| 91 add_text_track_cb_ = add_text_track_cb; | |
| 92 waiting_for_decryption_key_cb_ = waiting_for_decryption_key_cb; | |
| 93 | |
| 94 task_runner_->PostTask( | |
| 95 FROM_HERE, base::Bind(&Pipeline::StartTask, weak_factory_.GetWeakPtr())); | |
| 96 } | |
| 97 | |
| 98 void Pipeline::Stop(const base::Closure& stop_cb) { | |
| 99 DVLOG(2) << __FUNCTION__; | |
| 100 task_runner_->PostTask( | |
| 101 FROM_HERE, | |
| 102 base::Bind(&Pipeline::StopTask, weak_factory_.GetWeakPtr(), stop_cb)); | |
| 103 } | |
| 104 | |
| 105 void Pipeline::Seek(TimeDelta time, const PipelineStatusCB& seek_cb) { | |
| 106 base::AutoLock auto_lock(lock_); | |
| 107 if (!running_) { | |
| 108 DLOG(ERROR) << "Media pipeline isn't running. Ignoring Seek()."; | |
| 109 return; | |
| 110 } | |
| 111 | |
| 112 task_runner_->PostTask( | |
| 113 FROM_HERE, | |
| 114 base::Bind( | |
| 115 &Pipeline::SeekTask, weak_factory_.GetWeakPtr(), time, seek_cb)); | |
| 116 } | |
| 117 | |
| 118 bool Pipeline::IsRunning() const { | |
| 119 base::AutoLock auto_lock(lock_); | |
| 120 return running_; | |
| 121 } | |
| 122 | |
| 123 double Pipeline::GetPlaybackRate() const { | |
| 124 base::AutoLock auto_lock(lock_); | |
| 125 return playback_rate_; | |
| 126 } | |
| 127 | |
| 128 void Pipeline::SetPlaybackRate(double playback_rate) { | |
| 129 if (playback_rate < 0.0) | |
| 130 return; | |
| 131 | |
| 132 base::AutoLock auto_lock(lock_); | |
| 133 playback_rate_ = playback_rate; | |
| 134 if (running_) { | |
| 135 task_runner_->PostTask(FROM_HERE, | |
| 136 base::Bind(&Pipeline::PlaybackRateChangedTask, | |
| 137 weak_factory_.GetWeakPtr(), | |
| 138 playback_rate)); | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 void Pipeline::Suspend(const PipelineStatusCB& suspend_cb) { | |
| 143 task_runner_->PostTask( | |
| 144 FROM_HERE, base::Bind(&Pipeline::SuspendTask, weak_factory_.GetWeakPtr(), | |
| 145 suspend_cb)); | |
| 146 } | |
| 147 | |
| 148 void Pipeline::Resume(scoped_ptr<Renderer> renderer, | |
| 149 base::TimeDelta timestamp, | |
| 150 const PipelineStatusCB& seek_cb) { | |
| 151 task_runner_->PostTask( | |
| 152 FROM_HERE, | |
| 153 base::Bind(&Pipeline::ResumeTask, weak_factory_.GetWeakPtr(), | |
| 154 base::Passed(std::move(renderer)), timestamp, seek_cb)); | |
| 155 } | |
| 156 | |
| 157 float Pipeline::GetVolume() const { | |
| 158 base::AutoLock auto_lock(lock_); | |
| 159 return volume_; | |
| 160 } | |
| 161 | |
| 162 void Pipeline::SetVolume(float volume) { | |
| 163 if (volume < 0.0f || volume > 1.0f) | |
| 164 return; | |
| 165 | |
| 166 base::AutoLock auto_lock(lock_); | |
| 167 volume_ = volume; | |
| 168 if (running_) { | |
| 169 task_runner_->PostTask( | |
| 170 FROM_HERE, | |
| 171 base::Bind( | |
| 172 &Pipeline::VolumeChangedTask, weak_factory_.GetWeakPtr(), volume)); | |
| 173 } | |
| 174 } | |
| 175 | |
| 176 TimeDelta Pipeline::GetMediaTime() const { | |
| 177 base::AutoLock auto_lock(lock_); | |
| 178 if (suspend_timestamp_ != kNoTimestamp()) | |
| 179 return suspend_timestamp_; | |
| 180 return renderer_ ? std::min(renderer_->GetMediaTime(), duration_) | |
| 181 : TimeDelta(); | |
| 182 } | |
| 183 | |
| 184 Ranges<TimeDelta> Pipeline::GetBufferedTimeRanges() const { | |
| 185 base::AutoLock auto_lock(lock_); | |
| 186 return buffered_time_ranges_; | |
| 187 } | |
| 188 | |
| 189 TimeDelta Pipeline::GetMediaDuration() const { | |
| 190 base::AutoLock auto_lock(lock_); | |
| 191 return duration_; | |
| 192 } | |
| 193 | |
| 194 bool Pipeline::DidLoadingProgress() { | |
| 195 base::AutoLock auto_lock(lock_); | |
| 196 bool ret = did_loading_progress_; | |
| 197 did_loading_progress_ = false; | |
| 198 return ret; | |
| 199 } | |
| 200 | |
| 201 PipelineStatistics Pipeline::GetStatistics() const { | |
| 202 base::AutoLock auto_lock(lock_); | |
| 203 return statistics_; | |
| 204 } | |
| 205 | |
| 206 void Pipeline::SetCdm(CdmContext* cdm_context, | |
| 207 const CdmAttachedCB& cdm_attached_cb) { | |
| 208 task_runner_->PostTask( | |
| 209 FROM_HERE, base::Bind(&Pipeline::SetCdmTask, weak_factory_.GetWeakPtr(), | |
| 210 cdm_context, cdm_attached_cb)); | |
| 211 } | |
| 212 | |
| 213 void Pipeline::SetErrorForTesting(PipelineStatus status) { | |
| 214 OnError(status); | |
| 215 } | |
| 216 | |
| 217 bool Pipeline::HasWeakPtrsForTesting() const { | |
| 218 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 219 return weak_factory_.HasWeakPtrs(); | |
| 220 } | |
| 221 | |
| 222 void Pipeline::SetState(State next_state) { | |
| 223 DVLOG(1) << GetStateString(state_) << " -> " << GetStateString(next_state); | |
| 224 | |
| 225 state_ = next_state; | |
| 226 media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(next_state)); | |
| 227 } | |
| 228 | |
| 229 #define RETURN_STRING(state) case state: return #state; | |
| 230 | |
| 231 const char* Pipeline::GetStateString(State state) { | |
| 232 switch (state) { | |
| 233 RETURN_STRING(kCreated); | |
| 234 RETURN_STRING(kInitDemuxer); | |
| 235 RETURN_STRING(kInitRenderer); | |
| 236 RETURN_STRING(kSeeking); | |
| 237 RETURN_STRING(kPlaying); | |
| 238 RETURN_STRING(kStopping); | |
| 239 RETURN_STRING(kStopped); | |
| 240 RETURN_STRING(kSuspending); | |
| 241 RETURN_STRING(kSuspended); | |
| 242 RETURN_STRING(kResuming); | |
| 243 } | |
| 244 NOTREACHED(); | |
| 245 return "INVALID"; | |
| 246 } | |
| 247 | |
| 248 #undef RETURN_STRING | |
| 249 | |
| 250 Pipeline::State Pipeline::GetNextState() const { | |
| 251 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 252 DCHECK(stop_cb_.is_null()) | |
| 253 << "State transitions don't happen when stopping"; | |
| 254 DCHECK_EQ(status_, PIPELINE_OK) | |
| 255 << "State transitions don't happen when there's an error: " << status_; | |
| 256 | |
| 257 switch (state_) { | |
| 258 case kCreated: | |
| 259 return kInitDemuxer; | |
| 260 | |
| 261 case kInitDemuxer: | |
| 262 return kInitRenderer; | |
| 263 | |
| 264 case kInitRenderer: | |
| 265 case kSeeking: | |
| 266 return kPlaying; | |
| 267 | |
| 268 case kSuspending: | |
| 269 return kSuspended; | |
| 270 | |
| 271 case kSuspended: | |
| 272 return kResuming; | |
| 273 | |
| 274 case kResuming: | |
| 275 return kPlaying; | |
| 276 | |
| 277 case kPlaying: | |
| 278 case kStopping: | |
| 279 case kStopped: | |
| 280 break; | |
| 281 } | |
| 282 NOTREACHED() << "State has no transition: " << state_; | |
| 283 return state_; | |
| 284 } | |
| 285 | |
| 286 void Pipeline::OnDemuxerError(PipelineStatus error) { | |
| 287 task_runner_->PostTask(FROM_HERE, | |
| 288 base::Bind(&Pipeline::ErrorChangedTask, | |
| 289 weak_factory_.GetWeakPtr(), | |
| 290 error)); | |
| 291 } | |
| 292 | |
| 293 void Pipeline::AddTextStream(DemuxerStream* text_stream, | |
| 294 const TextTrackConfig& config) { | |
| 295 task_runner_->PostTask(FROM_HERE, | |
| 296 base::Bind(&Pipeline::AddTextStreamTask, | |
| 297 weak_factory_.GetWeakPtr(), | |
| 298 text_stream, | |
| 299 config)); | |
| 300 } | |
| 301 | |
| 302 void Pipeline::RemoveTextStream(DemuxerStream* text_stream) { | |
| 303 task_runner_->PostTask(FROM_HERE, | |
| 304 base::Bind(&Pipeline::RemoveTextStreamTask, | |
| 305 weak_factory_.GetWeakPtr(), | |
| 306 text_stream)); | |
| 307 } | |
| 308 | |
| 309 void Pipeline::OnError(PipelineStatus error) { | |
| 310 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 311 DCHECK(IsRunning()); | |
| 312 DCHECK_NE(PIPELINE_OK, error); | |
| 313 VLOG(1) << "Media pipeline error: " << error; | |
| 314 | |
| 315 task_runner_->PostTask(FROM_HERE, base::Bind( | |
| 316 &Pipeline::ErrorChangedTask, weak_factory_.GetWeakPtr(), error)); | |
| 317 } | |
| 318 | |
| 319 void Pipeline::SetDuration(TimeDelta duration) { | |
| 320 DCHECK(IsRunning()); | |
| 321 media_log_->AddEvent( | |
| 322 media_log_->CreateTimeEvent( | |
| 323 MediaLogEvent::DURATION_SET, "duration", duration)); | |
| 324 UMA_HISTOGRAM_LONG_TIMES("Media.Duration", duration); | |
| 325 | |
| 326 base::AutoLock auto_lock(lock_); | |
| 327 duration_ = duration; | |
| 328 if (!duration_change_cb_.is_null()) | |
| 329 duration_change_cb_.Run(); | |
| 330 } | |
| 331 | |
| 332 void Pipeline::StateTransitionTask(PipelineStatus status) { | |
| 333 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 334 | |
| 335 // No-op any state transitions if we're stopping. | |
| 336 if (state_ == kStopping || state_ == kStopped) | |
| 337 return; | |
| 338 | |
| 339 // Preserve existing abnormal status, otherwise update based on the result of | |
| 340 // the previous operation. | |
| 341 status_ = (status_ != PIPELINE_OK ? status_ : status); | |
| 342 | |
| 343 if (status_ != PIPELINE_OK) { | |
| 344 ErrorChangedTask(status_); | |
| 345 return; | |
| 346 } | |
| 347 | |
| 348 // Guard against accidentally clearing |pending_callbacks_| for states that | |
| 349 // use it as well as states that should not be using it. | |
| 350 DCHECK_EQ(pending_callbacks_.get() != NULL, | |
| 351 state_ == kSeeking || state_ == kSuspending || state_ == kResuming); | |
| 352 | |
| 353 pending_callbacks_.reset(); | |
| 354 | |
| 355 PipelineStatusCB done_cb = | |
| 356 base::Bind(&Pipeline::StateTransitionTask, weak_factory_.GetWeakPtr()); | |
| 357 | |
| 358 // Switch states, performing any entrance actions for the new state as well. | |
| 359 SetState(GetNextState()); | |
| 360 switch (state_) { | |
| 361 case kInitDemuxer: | |
| 362 return InitializeDemuxer(done_cb); | |
| 363 | |
| 364 case kInitRenderer: | |
| 365 // When the state_ transfers to kInitRenderer, it means the demuxer has | |
| 366 // finished parsing the init info. It should call ReportMetadata in case | |
| 367 // meeting 'decode' error when passing media segment but WebMediaPlayer's | |
| 368 // ready_state_ is still ReadyStateHaveNothing. In that case, it will | |
| 369 // treat it as NetworkStateFormatError not NetworkStateDecodeError. | |
| 370 ReportMetadata(); | |
| 371 start_timestamp_ = demuxer_->GetStartTime(); | |
| 372 | |
| 373 return InitializeRenderer(done_cb); | |
| 374 | |
| 375 case kPlaying: | |
| 376 DCHECK(start_timestamp_ >= base::TimeDelta()); | |
| 377 renderer_->StartPlayingFrom(start_timestamp_); | |
| 378 { | |
| 379 base::AutoLock auto_lock(lock_); | |
| 380 suspend_timestamp_ = kNoTimestamp(); | |
| 381 } | |
| 382 | |
| 383 if (text_renderer_) | |
| 384 text_renderer_->StartPlaying(); | |
| 385 | |
| 386 base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK); | |
| 387 | |
| 388 PlaybackRateChangedTask(GetPlaybackRate()); | |
| 389 VolumeChangedTask(GetVolume()); | |
| 390 return; | |
| 391 | |
| 392 case kSuspended: | |
| 393 renderer_.reset(); | |
| 394 base::ResetAndReturn(&suspend_cb_).Run(PIPELINE_OK); | |
| 395 return; | |
| 396 | |
| 397 case kStopping: | |
| 398 case kStopped: | |
| 399 case kCreated: | |
| 400 case kSeeking: | |
| 401 case kSuspending: | |
| 402 case kResuming: | |
| 403 NOTREACHED() << "State has no transition: " << state_; | |
| 404 return; | |
| 405 } | |
| 406 } | |
| 407 | |
| 408 // Note that the usage of base::Unretained() with the renderers is considered | |
| 409 // safe as they are owned by |pending_callbacks_| and share the same lifetime. | |
| 410 // | |
| 411 // That being said, deleting the renderers while keeping |pending_callbacks_| | |
| 412 // running on the media thread would result in crashes. | |
| 413 void Pipeline::DoSeek(TimeDelta seek_timestamp, | |
| 414 const PipelineStatusCB& done_cb) { | |
| 415 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 416 DCHECK(!pending_callbacks_.get()); | |
| 417 DCHECK_EQ(state_, kSeeking); | |
| 418 SerialRunner::Queue bound_fns; | |
| 419 | |
| 420 // Pause. | |
| 421 if (text_renderer_) { | |
| 422 bound_fns.Push(base::Bind( | |
| 423 &TextRenderer::Pause, base::Unretained(text_renderer_.get()))); | |
| 424 } | |
| 425 | |
| 426 // Flush. | |
| 427 DCHECK(renderer_); | |
| 428 bound_fns.Push( | |
| 429 base::Bind(&Renderer::Flush, base::Unretained(renderer_.get()))); | |
| 430 | |
| 431 if (text_renderer_) { | |
| 432 bound_fns.Push(base::Bind( | |
| 433 &TextRenderer::Flush, base::Unretained(text_renderer_.get()))); | |
| 434 } | |
| 435 | |
| 436 // Seek demuxer. | |
| 437 bound_fns.Push(base::Bind( | |
| 438 &Demuxer::Seek, base::Unretained(demuxer_), seek_timestamp)); | |
| 439 | |
| 440 pending_callbacks_ = SerialRunner::Run(bound_fns, done_cb); | |
| 441 } | |
| 442 | |
| 443 void Pipeline::DoStop(const PipelineStatusCB& done_cb) { | |
| 444 DVLOG(2) << __FUNCTION__; | |
| 445 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 446 DCHECK(!pending_callbacks_.get()); | |
| 447 | |
| 448 // TODO(scherkus): Enforce that Renderer is only called on a single thread, | |
| 449 // even for accessing media time http://crbug.com/370634 | |
| 450 scoped_ptr<Renderer> renderer; | |
| 451 { | |
| 452 base::AutoLock auto_lock(lock_); | |
| 453 renderer.swap(renderer_); | |
| 454 } | |
| 455 renderer.reset(); | |
| 456 text_renderer_.reset(); | |
| 457 | |
| 458 if (demuxer_) { | |
| 459 demuxer_->Stop(); | |
| 460 demuxer_ = NULL; | |
| 461 } | |
| 462 | |
| 463 task_runner_->PostTask(FROM_HERE, base::Bind(done_cb, PIPELINE_OK)); | |
| 464 } | |
| 465 | |
| 466 void Pipeline::OnStopCompleted(PipelineStatus status) { | |
| 467 DVLOG(2) << __FUNCTION__; | |
| 468 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 469 DCHECK_EQ(state_, kStopping); | |
| 470 DCHECK(!renderer_); | |
| 471 DCHECK(!text_renderer_); | |
| 472 | |
| 473 { | |
| 474 base::AutoLock auto_lock(lock_); | |
| 475 running_ = false; | |
| 476 } | |
| 477 | |
| 478 SetState(kStopped); | |
| 479 demuxer_ = NULL; | |
| 480 | |
| 481 // If we stop during initialization/seeking/suspending we don't want to leave | |
| 482 // outstanding callbacks around. | |
| 483 if (!seek_cb_.is_null()) { | |
| 484 base::ResetAndReturn(&seek_cb_).Run(status_); | |
| 485 error_cb_.Reset(); | |
| 486 } | |
| 487 if (!suspend_cb_.is_null()) { | |
| 488 base::ResetAndReturn(&suspend_cb_).Run(status_); | |
| 489 error_cb_.Reset(); | |
| 490 } | |
| 491 if (!stop_cb_.is_null()) { | |
| 492 error_cb_.Reset(); | |
| 493 | |
| 494 // Invalid all weak pointers so it's safe to destroy |this| on the render | |
| 495 // main thread. | |
| 496 weak_factory_.InvalidateWeakPtrs(); | |
| 497 | |
| 498 base::ResetAndReturn(&stop_cb_).Run(); | |
| 499 | |
| 500 // NOTE: pipeline may be deleted at this point in time as a result of | |
| 501 // executing |stop_cb_|. | |
| 502 return; | |
| 503 } | |
| 504 if (!error_cb_.is_null()) { | |
| 505 DCHECK_NE(status_, PIPELINE_OK); | |
| 506 base::ResetAndReturn(&error_cb_).Run(status_); | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 void Pipeline::OnBufferedTimeRangesChanged( | |
| 511 const Ranges<base::TimeDelta>& ranges) { | |
| 512 DCHECK(IsRunning()); | |
| 513 base::AutoLock auto_lock(lock_); | |
| 514 buffered_time_ranges_ = ranges; | |
| 515 did_loading_progress_ = true; | |
| 516 } | |
| 517 | |
| 518 // Called from any thread. | |
| 519 void Pipeline::OnUpdateStatistics(const PipelineStatistics& stats_delta) { | |
| 520 base::AutoLock auto_lock(lock_); | |
| 521 statistics_.audio_bytes_decoded += stats_delta.audio_bytes_decoded; | |
| 522 statistics_.video_bytes_decoded += stats_delta.video_bytes_decoded; | |
| 523 statistics_.video_frames_decoded += stats_delta.video_frames_decoded; | |
| 524 statistics_.video_frames_dropped += stats_delta.video_frames_dropped; | |
| 525 statistics_.audio_memory_usage += stats_delta.audio_memory_usage; | |
| 526 statistics_.video_memory_usage += stats_delta.video_memory_usage; | |
| 527 } | |
| 528 | |
| 529 void Pipeline::StartTask() { | |
| 530 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 531 | |
| 532 CHECK_EQ(kCreated, state_) | |
| 533 << "Media pipeline cannot be started more than once"; | |
| 534 | |
| 535 text_renderer_ = CreateTextRenderer(); | |
| 536 if (text_renderer_) { | |
| 537 text_renderer_->Initialize( | |
| 538 base::Bind(&Pipeline::OnTextRendererEnded, weak_factory_.GetWeakPtr())); | |
| 539 } | |
| 540 | |
| 541 // Set CDM early to avoid unnecessary delay in Renderer::Initialize(). | |
| 542 if (pending_cdm_context_) { | |
| 543 renderer_->SetCdm(pending_cdm_context_, base::Bind(&IgnoreCdmAttached)); | |
| 544 pending_cdm_context_ = nullptr; | |
| 545 } | |
| 546 | |
| 547 StateTransitionTask(PIPELINE_OK); | |
| 548 } | |
| 549 | |
| 550 void Pipeline::StopTask(const base::Closure& stop_cb) { | |
| 551 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 552 DCHECK(stop_cb_.is_null()); | |
| 553 | |
| 554 if (state_ == kStopped) { | |
| 555 // Invalid all weak pointers so it's safe to destroy |this| on the render | |
| 556 // main thread. | |
| 557 weak_factory_.InvalidateWeakPtrs(); | |
| 558 | |
| 559 // NOTE: pipeline may be deleted at this point in time as a result of | |
| 560 // executing |stop_cb|. | |
| 561 stop_cb.Run(); | |
| 562 | |
| 563 return; | |
| 564 } | |
| 565 | |
| 566 stop_cb_ = stop_cb; | |
| 567 | |
| 568 // We may already be stopping due to a runtime error. | |
| 569 if (state_ == kStopping) | |
| 570 return; | |
| 571 | |
| 572 // Do not report statistics if the pipeline is not fully initialized. | |
| 573 if (state_ == kSeeking || state_ == kPlaying || state_ == kSuspending || | |
| 574 state_ == kSuspended || state_ == kResuming) { | |
| 575 PipelineStatistics stats = GetStatistics(); | |
| 576 if (stats.video_frames_decoded > 0) { | |
| 577 UMA_HISTOGRAM_COUNTS("Media.DroppedFrameCount", | |
| 578 stats.video_frames_dropped); | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 SetState(kStopping); | |
| 583 pending_callbacks_.reset(); | |
| 584 DoStop(base::Bind(&Pipeline::OnStopCompleted, weak_factory_.GetWeakPtr())); | |
| 585 } | |
| 586 | |
| 587 void Pipeline::ErrorChangedTask(PipelineStatus error) { | |
| 588 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 589 DCHECK_NE(PIPELINE_OK, error) << "PIPELINE_OK isn't an error!"; | |
| 590 | |
| 591 media_log_->AddEvent(media_log_->CreatePipelineErrorEvent(error)); | |
| 592 | |
| 593 if (state_ == kStopping || state_ == kStopped) | |
| 594 return; | |
| 595 | |
| 596 SetState(kStopping); | |
| 597 pending_callbacks_.reset(); | |
| 598 status_ = error; | |
| 599 | |
| 600 DoStop(base::Bind(&Pipeline::OnStopCompleted, weak_factory_.GetWeakPtr())); | |
| 601 } | |
| 602 | |
| 603 void Pipeline::PlaybackRateChangedTask(double playback_rate) { | |
| 604 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 605 | |
| 606 // Playback rate changes are only carried out while playing. | |
| 607 if (state_ != kPlaying) | |
| 608 return; | |
| 609 | |
| 610 renderer_->SetPlaybackRate(playback_rate); | |
| 611 } | |
| 612 | |
| 613 void Pipeline::VolumeChangedTask(float volume) { | |
| 614 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 615 | |
| 616 // Volume changes are only carried out while playing. | |
| 617 if (state_ != kPlaying) | |
| 618 return; | |
| 619 | |
| 620 renderer_->SetVolume(volume); | |
| 621 } | |
| 622 | |
| 623 void Pipeline::SeekTask(TimeDelta time, const PipelineStatusCB& seek_cb) { | |
| 624 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 625 DCHECK(stop_cb_.is_null()); | |
| 626 | |
| 627 // Suppress seeking if we're not fully started. | |
| 628 if (state_ != kPlaying) { | |
| 629 DCHECK(state_ == kStopping || state_ == kStopped) | |
| 630 << "Receive seek in unexpected state: " << state_; | |
| 631 seek_cb.Run(PIPELINE_ERROR_INVALID_STATE); | |
| 632 return; | |
| 633 } | |
| 634 | |
| 635 DCHECK(seek_cb_.is_null()); | |
| 636 | |
| 637 const base::TimeDelta seek_timestamp = | |
| 638 std::max(time, demuxer_->GetStartTime()); | |
| 639 | |
| 640 SetState(kSeeking); | |
| 641 seek_cb_ = seek_cb; | |
| 642 renderer_ended_ = false; | |
| 643 text_renderer_ended_ = false; | |
| 644 start_timestamp_ = seek_timestamp; | |
| 645 | |
| 646 DoSeek(seek_timestamp, base::Bind(&Pipeline::StateTransitionTask, | |
| 647 weak_factory_.GetWeakPtr())); | |
| 648 } | |
| 649 | |
| 650 void Pipeline::SuspendTask(const PipelineStatusCB& suspend_cb) { | |
| 651 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 652 | |
| 653 // Suppress suspending if we're not playing. | |
| 654 if (state_ != kPlaying) { | |
| 655 DCHECK(state_ == kStopping || state_ == kStopped) | |
| 656 << "Receive suspend in unexpected state: " << state_; | |
| 657 suspend_cb.Run(PIPELINE_ERROR_INVALID_STATE); | |
| 658 return; | |
| 659 } | |
| 660 DCHECK(renderer_); | |
| 661 DCHECK(!pending_callbacks_.get()); | |
| 662 | |
| 663 SetState(kSuspending); | |
| 664 suspend_cb_ = suspend_cb; | |
| 665 | |
| 666 // Freeze playback and record the media time before flushing. (Flushing clears | |
| 667 // the value.) | |
| 668 renderer_->SetPlaybackRate(0.0); | |
| 669 { | |
| 670 base::AutoLock auto_lock(lock_); | |
| 671 suspend_timestamp_ = renderer_->GetMediaTime(); | |
| 672 DCHECK(suspend_timestamp_ != kNoTimestamp()); | |
| 673 } | |
| 674 | |
| 675 // Queue the asynchronous actions required to stop playback. (Matches setup in | |
| 676 // DoSeek().) | |
| 677 // TODO(sandersd): Share implementation with DoSeek(). | |
| 678 SerialRunner::Queue fns; | |
| 679 | |
| 680 if (text_renderer_) { | |
| 681 fns.Push(base::Bind(&TextRenderer::Pause, | |
| 682 base::Unretained(text_renderer_.get()))); | |
| 683 } | |
| 684 | |
| 685 fns.Push(base::Bind(&Renderer::Flush, base::Unretained(renderer_.get()))); | |
| 686 | |
| 687 if (text_renderer_) { | |
| 688 fns.Push(base::Bind(&TextRenderer::Flush, | |
| 689 base::Unretained(text_renderer_.get()))); | |
| 690 } | |
| 691 | |
| 692 pending_callbacks_ = SerialRunner::Run( | |
| 693 fns, | |
| 694 base::Bind(&Pipeline::StateTransitionTask, weak_factory_.GetWeakPtr())); | |
| 695 } | |
| 696 | |
| 697 void Pipeline::ResumeTask(scoped_ptr<Renderer> renderer, | |
| 698 base::TimeDelta timestamp, | |
| 699 const PipelineStatusCB& seek_cb) { | |
| 700 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 701 | |
| 702 // Suppress resuming if we're not suspended. | |
| 703 if (state_ != kSuspended) { | |
| 704 DCHECK(state_ == kStopping || state_ == kStopped) | |
| 705 << "Receive resume in unexpected state: " << state_; | |
| 706 seek_cb.Run(PIPELINE_ERROR_INVALID_STATE); | |
| 707 return; | |
| 708 } | |
| 709 DCHECK(!renderer_); | |
| 710 DCHECK(!pending_callbacks_.get()); | |
| 711 | |
| 712 SetState(kResuming); | |
| 713 renderer_ = std::move(renderer); | |
| 714 | |
| 715 // Set up for a seek. (Matches setup in SeekTask().) | |
| 716 // TODO(sandersd): Share implementation with SeekTask(). | |
| 717 seek_cb_ = seek_cb; | |
| 718 renderer_ended_ = false; | |
| 719 text_renderer_ended_ = false; | |
| 720 start_timestamp_ = std::max(timestamp, demuxer_->GetStartTime()); | |
| 721 | |
| 722 // Queue the asynchronous actions required to start playback. Unlike DoSeek(), | |
| 723 // we need to initialize the renderer ourselves (we don't want to enter state | |
| 724 // kInitDemuxer, and even if we did the current code would seek to the start | |
| 725 // instead of |timestamp|). | |
| 726 SerialRunner::Queue fns; | |
| 727 base::WeakPtr<Pipeline> weak_this = weak_factory_.GetWeakPtr(); | |
| 728 | |
| 729 fns.Push( | |
| 730 base::Bind(&Demuxer::Seek, base::Unretained(demuxer_), start_timestamp_)); | |
| 731 | |
| 732 fns.Push(base::Bind(&Pipeline::InitializeRenderer, weak_this)); | |
| 733 | |
| 734 pending_callbacks_ = SerialRunner::Run( | |
| 735 fns, base::Bind(&Pipeline::StateTransitionTask, weak_this)); | |
| 736 } | |
| 737 | |
| 738 void Pipeline::SetCdmTask(CdmContext* cdm_context, | |
| 739 const CdmAttachedCB& cdm_attached_cb) { | |
| 740 base::AutoLock auto_lock(lock_); | |
| 741 if (!renderer_) { | |
| 742 pending_cdm_context_ = cdm_context; | |
| 743 cdm_attached_cb.Run(true); | |
| 744 return; | |
| 745 } | |
| 746 | |
| 747 renderer_->SetCdm(cdm_context, cdm_attached_cb); | |
| 748 } | |
| 749 | |
| 750 void Pipeline::OnRendererEnded() { | |
| 751 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 752 media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::ENDED)); | |
| 753 | |
| 754 if (state_ != kPlaying) | |
| 755 return; | |
| 756 | |
| 757 DCHECK(!renderer_ended_); | |
| 758 renderer_ended_ = true; | |
| 759 | |
| 760 RunEndedCallbackIfNeeded(); | |
| 761 } | |
| 762 | |
| 763 void Pipeline::OnTextRendererEnded() { | |
| 764 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 765 media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::TEXT_ENDED)); | |
| 766 | |
| 767 if (state_ != kPlaying) | |
| 768 return; | |
| 769 | |
| 770 DCHECK(!text_renderer_ended_); | |
| 771 text_renderer_ended_ = true; | |
| 772 | |
| 773 RunEndedCallbackIfNeeded(); | |
| 774 } | |
| 775 | |
| 776 void Pipeline::RunEndedCallbackIfNeeded() { | |
| 777 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 778 | |
| 779 if (renderer_ && !renderer_ended_) | |
| 780 return; | |
| 781 | |
| 782 if (text_renderer_ && text_renderer_->HasTracks() && !text_renderer_ended_) | |
| 783 return; | |
| 784 | |
| 785 DCHECK_EQ(status_, PIPELINE_OK); | |
| 786 ended_cb_.Run(); | |
| 787 } | |
| 788 | |
| 789 scoped_ptr<TextRenderer> Pipeline::CreateTextRenderer() { | |
| 790 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 791 | |
| 792 const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess(); | |
| 793 if (!cmd_line->HasSwitch(switches::kEnableInbandTextTracks)) | |
| 794 return scoped_ptr<media::TextRenderer>(); | |
| 795 | |
| 796 return scoped_ptr<media::TextRenderer>(new media::TextRenderer( | |
| 797 task_runner_, | |
| 798 base::Bind(&Pipeline::OnAddTextTrack, weak_factory_.GetWeakPtr()))); | |
| 799 } | |
| 800 | |
| 801 void Pipeline::AddTextStreamTask(DemuxerStream* text_stream, | |
| 802 const TextTrackConfig& config) { | |
| 803 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 804 // TODO(matthewjheaney): fix up text_ended_ when text stream | |
| 805 // is added (http://crbug.com/321446). | |
| 806 if (text_renderer_) | |
| 807 text_renderer_->AddTextStream(text_stream, config); | |
| 808 } | |
| 809 | |
| 810 void Pipeline::RemoveTextStreamTask(DemuxerStream* text_stream) { | |
| 811 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 812 if (text_renderer_) | |
| 813 text_renderer_->RemoveTextStream(text_stream); | |
| 814 } | |
| 815 | |
| 816 void Pipeline::OnAddTextTrack(const TextTrackConfig& config, | |
| 817 const AddTextTrackDoneCB& done_cb) { | |
| 818 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 819 add_text_track_cb_.Run(config, done_cb); | |
| 820 } | |
| 821 | |
| 822 void Pipeline::InitializeDemuxer(const PipelineStatusCB& done_cb) { | |
| 823 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 824 demuxer_->Initialize(this, done_cb, !!text_renderer_); | |
| 825 } | |
| 826 | |
| 827 void Pipeline::InitializeRenderer(const PipelineStatusCB& done_cb) { | |
| 828 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 829 | |
| 830 if (!demuxer_->GetStream(DemuxerStream::AUDIO) && | |
| 831 !demuxer_->GetStream(DemuxerStream::VIDEO)) { | |
| 832 { | |
| 833 base::AutoLock auto_lock(lock_); | |
| 834 renderer_.reset(); | |
| 835 } | |
| 836 OnError(PIPELINE_ERROR_COULD_NOT_RENDER); | |
| 837 return; | |
| 838 } | |
| 839 | |
| 840 base::WeakPtr<Pipeline> weak_this = weak_factory_.GetWeakPtr(); | |
| 841 renderer_->Initialize( | |
| 842 demuxer_, | |
| 843 done_cb, | |
| 844 base::Bind(&Pipeline::OnUpdateStatistics, weak_this), | |
| 845 base::Bind(&Pipeline::BufferingStateChanged, weak_this), | |
| 846 base::Bind(&Pipeline::OnRendererEnded, weak_this), | |
| 847 base::Bind(&Pipeline::OnError, weak_this), | |
| 848 waiting_for_decryption_key_cb_); | |
| 849 } | |
| 850 | |
| 851 void Pipeline::ReportMetadata() { | |
| 852 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 853 PipelineMetadata metadata; | |
| 854 metadata.timeline_offset = demuxer_->GetTimelineOffset(); | |
| 855 DemuxerStream* stream = demuxer_->GetStream(DemuxerStream::VIDEO); | |
| 856 if (stream) { | |
| 857 metadata.has_video = true; | |
| 858 metadata.natural_size = stream->video_decoder_config().natural_size(); | |
| 859 metadata.video_rotation = stream->video_rotation(); | |
| 860 } | |
| 861 if (demuxer_->GetStream(DemuxerStream::AUDIO)) { | |
| 862 metadata.has_audio = true; | |
| 863 } | |
| 864 metadata_cb_.Run(metadata); | |
| 865 } | |
| 866 | |
| 867 void Pipeline::BufferingStateChanged(BufferingState new_buffering_state) { | |
| 868 DVLOG(1) << __FUNCTION__ << "(" << new_buffering_state << ") "; | |
| 869 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 870 buffering_state_cb_.Run(new_buffering_state); | |
| 871 } | |
| 872 | |
| 873 } // namespace media | |
| OLD | NEW |
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Chromium Code Reviews
Issue 1658303002:
Create abstract interface for media::Pipeline. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master