media/blink/webmediaplayer_impl.cc

   1 // Copyright 2013 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/blink/webmediaplayer_impl.h"
   6
   7 #include <algorithm>
   8 #include <cmath>
   9 #include <limits>
  10
  11 #include "base/bind.h"
  12 #include "base/callback.h"
  13 #include "base/callback_helpers.h"
  14 #include "base/debug/alias.h"
  15 #include "base/debug/crash_logging.h"
  16 #include "base/metrics/histogram.h"
  17 #include "base/single_thread_task_runner.h"
  18 #include "base/synchronization/waitable_event.h"
  19 #include "base/thread_task_runner_handle.h"
  20 #include "base/trace_event/trace_event.h"
  21 #include "cc/blink/web_layer_impl.h"
  22 #include "cc/layers/video_layer.h"
  23 #include "gpu/blink/webgraphicscontext3d_impl.h"
  24 #include "media/audio/null_audio_sink.h"
  25 #include "media/base/bind_to_current_loop.h"
  26 #include "media/base/cdm_context.h"
  27 #include "media/base/limits.h"
  28 #include "media/base/media_log.h"
  29 #include "media/base/text_renderer.h"
  30 #include "media/base/timestamp_constants.h"
  31 #include "media/base/video_frame.h"
  32 #include "media/blink/texttrack_impl.h"
  33 #include "media/blink/webaudiosourceprovider_impl.h"
  34 #include "media/blink/webcontentdecryptionmodule_impl.h"
  35 #include "media/blink/webinbandtexttrack_impl.h"
  36 #include "media/blink/webmediaplayer_delegate.h"
  37 #include "media/blink/webmediaplayer_util.h"
  38 #include "media/blink/webmediasource_impl.h"
  39 #include "media/filters/chunk_demuxer.h"
  40 #include "media/filters/ffmpeg_demuxer.h"
  41 #include "third_party/WebKit/public/platform/WebEncryptedMediaTypes.h"
  42 #include "third_party/WebKit/public/platform/WebMediaPlayerClient.h"
  43 #include "third_party/WebKit/public/platform/WebMediaPlayerEncryptedMediaClient.h"
  44 #include "third_party/WebKit/public/platform/WebMediaSource.h"
  45 #include "third_party/WebKit/public/platform/WebRect.h"
  46 #include "third_party/WebKit/public/platform/WebSize.h"
  47 #include "third_party/WebKit/public/platform/WebString.h"
  48 #include "third_party/WebKit/public/platform/WebURL.h"
  49 #include "third_party/WebKit/public/web/WebDocument.h"
  50 #include "third_party/WebKit/public/web/WebFrame.h"
  51 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  52 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  53 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  54 #include "third_party/WebKit/public/web/WebView.h"
  55
  56 using blink::WebCanvas;
  57 using blink::WebMediaPlayer;
  58 using blink::WebRect;
  59 using blink::WebSize;
  60 using blink::WebString;
  61
  62 namespace {
  63
  64 // Limits the range of playback rate.
  65 //
  66 // TODO(kylep): Revisit these.
  67 //
  68 // Vista has substantially lower performance than XP or Windows7.  If you speed
  69 // up a video too much, it can't keep up, and rendering stops updating except on
  70 // the time bar. For really high speeds, audio becomes a bottleneck and we just
  71 // use up the data we have, which may not achieve the speed requested, but will
  72 // not crash the tab.
  73 //
  74 // A very slow speed, ie 0.00000001x, causes the machine to lock up. (It seems
  75 // like a busy loop). It gets unresponsive, although its not completely dead.
  76 //
  77 // Also our timers are not very accurate (especially for ogg), which becomes
  78 // evident at low speeds and on Vista. Since other speeds are risky and outside
  79 // the norms, we think 1/16x to 16x is a safe and useful range for now.
  80 const double kMinRate = 0.0625;
  81 const double kMaxRate = 16.0;
  82
  83 }  // namespace
  84
  85 namespace media {
  86
  87 class BufferedDataSourceHostImpl;
  88
  89 #define STATIC_ASSERT_MATCHING_ENUM(name) \
  90   static_assert(static_cast<int>(WebMediaPlayer::CORSMode ## name) == \
  91                 static_cast<int>(BufferedResourceLoader::k ## name), \
  92                 "mismatching enum values: " #name)
  93 STATIC_ASSERT_MATCHING_ENUM(Unspecified);
  94 STATIC_ASSERT_MATCHING_ENUM(Anonymous);
  95 STATIC_ASSERT_MATCHING_ENUM(UseCredentials);
  96 #undef STATIC_ASSERT_MATCHING_ENUM
  97
  98 #define BIND_TO_RENDER_LOOP(function) \
  99   (DCHECK(main_task_runner_->BelongsToCurrentThread()), \
 100   BindToCurrentLoop(base::Bind(function, AsWeakPtr())))
 101
 102 #define BIND_TO_RENDER_LOOP1(function, arg1) \
 103   (DCHECK(main_task_runner_->BelongsToCurrentThread()), \
 104   BindToCurrentLoop(base::Bind(function, AsWeakPtr(), arg1)))
 105
 106 WebMediaPlayerImpl::WebMediaPlayerImpl(
 107     blink::WebLocalFrame* frame,
 108     blink::WebMediaPlayerClient* client,
 109     blink::WebMediaPlayerEncryptedMediaClient* encrypted_client,
 110     base::WeakPtr<WebMediaPlayerDelegate> delegate,
 111     scoped_ptr<RendererFactory> renderer_factory,
 112     CdmFactory* cdm_factory,
 113     const WebMediaPlayerParams& params)
 114     : frame_(frame),
 115       network_state_(WebMediaPlayer::NetworkStateEmpty),
 116       ready_state_(WebMediaPlayer::ReadyStateHaveNothing),
 117       preload_(BufferedDataSource::AUTO),
 118       main_task_runner_(base::ThreadTaskRunnerHandle::Get()),
 119       media_task_runner_(params.media_task_runner()),
 120       worker_task_runner_(params.worker_task_runner()),
 121       media_log_(params.media_log()),
 122       pipeline_(media_task_runner_, media_log_.get()),
 123       load_type_(LoadTypeURL),
 124       opaque_(false),
 125       playback_rate_(0.0),
 126       paused_(true),
 127       seeking_(false),
 128       ended_(false),
 129       pending_seek_(false),
 130       should_notify_time_changed_(false),
 131       client_(client),
 132       encrypted_client_(encrypted_client),
 133       delegate_(delegate),
 134       defer_load_cb_(params.defer_load_cb()),
 135       context_3d_cb_(params.context_3d_cb()),
 136       supports_save_(true),
 137       chunk_demuxer_(NULL),
 138       // Threaded compositing isn't enabled universally yet.
 139       compositor_task_runner_(
 140           params.compositor_task_runner()
 141               ? params.compositor_task_runner()
 142               : base::MessageLoop::current()->task_runner()),
 143       compositor_(new VideoFrameCompositor(
 144           compositor_task_runner_,
 145           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNaturalSizeChanged),
 146           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnOpacityChanged))),
 147       encrypted_media_support_(cdm_factory,
 148                                encrypted_client,
 149                                params.media_permission(),
 150                                base::Bind(&WebMediaPlayerImpl::SetCdm,
 151                                           AsWeakPtr(),
 152                                           base::Bind(&IgnoreCdmAttached))),
 153       renderer_factory_(renderer_factory.Pass()) {
 154   media_log_->AddEvent(
 155       media_log_->CreateEvent(MediaLogEvent::WEBMEDIAPLAYER_CREATED));
 156
 157   if (params.initial_cdm()) {
 158     SetCdm(base::Bind(&IgnoreCdmAttached),
 159            ToWebContentDecryptionModuleImpl(params.initial_cdm())
 160                ->GetCdmContext());
 161   }
 162
 163   // TODO(xhwang): When we use an external Renderer, many methods won't work,
 164   // e.g. GetCurrentFrameFromCompositor(). See http://crbug.com/434861
 165
 166   // Use the null sink if no sink was provided.
 167   audio_source_provider_ = new WebAudioSourceProviderImpl(
 168       params.audio_renderer_sink().get()
 169           ? params.audio_renderer_sink()
 170           : new NullAudioSink(media_task_runner_));
 171 }
 172
 173 WebMediaPlayerImpl::~WebMediaPlayerImpl() {
 174   client_->setWebLayer(NULL);
 175
 176   DCHECK(main_task_runner_->BelongsToCurrentThread());
 177
 178   if (delegate_)
 179     delegate_->PlayerGone(this);
 180
 181   // Abort any pending IO so stopping the pipeline doesn't get blocked.
 182   if (data_source_)
 183     data_source_->Abort();
 184   if (chunk_demuxer_) {
 185     chunk_demuxer_->Shutdown();
 186     chunk_demuxer_ = NULL;
 187   }
 188
 189   renderer_factory_.reset();
 190
 191   // Make sure to kill the pipeline so there's no more media threads running.
 192   // Note: stopping the pipeline might block for a long time.
 193   base::WaitableEvent waiter(false, false);
 194   pipeline_.Stop(
 195       base::Bind(&base::WaitableEvent::Signal, base::Unretained(&waiter)));
 196   waiter.Wait();
 197
 198   compositor_task_runner_->DeleteSoon(FROM_HERE, compositor_);
 199
 200   media_log_->AddEvent(
 201       media_log_->CreateEvent(MediaLogEvent::WEBMEDIAPLAYER_DESTROYED));
 202 }
 203
 204 void WebMediaPlayerImpl::load(LoadType load_type, const blink::WebURL& url,
 205                               CORSMode cors_mode) {
 206   DVLOG(1) << __FUNCTION__ << "(" << load_type << ", " << url << ", "
 207            << cors_mode << ")";
 208   if (!defer_load_cb_.is_null()) {
 209     defer_load_cb_.Run(base::Bind(
 210         &WebMediaPlayerImpl::DoLoad, AsWeakPtr(), load_type, url, cors_mode));
 211     return;
 212   }
 213   DoLoad(load_type, url, cors_mode);
 214 }
 215
 216 void WebMediaPlayerImpl::DoLoad(LoadType load_type,
 217                                 const blink::WebURL& url,
 218                                 CORSMode cors_mode) {
 219   DCHECK(main_task_runner_->BelongsToCurrentThread());
 220
 221   GURL gurl(url);
 222   ReportMetrics(load_type, gurl,
 223                 GURL(frame_->document().securityOrigin().toString()));
 224
 225   // Set subresource URL for crash reporting.
 226   base::debug::SetCrashKeyValue("subresource_url", gurl.spec());
 227
 228   load_type_ = load_type;
 229
 230   SetNetworkState(WebMediaPlayer::NetworkStateLoading);
 231   SetReadyState(WebMediaPlayer::ReadyStateHaveNothing);
 232   media_log_->AddEvent(media_log_->CreateLoadEvent(url.spec()));
 233
 234   // Media source pipelines can start immediately.
 235   if (load_type == LoadTypeMediaSource) {
 236     supports_save_ = false;
 237     StartPipeline();
 238     return;
 239   }
 240
 241   // Otherwise it's a regular request which requires resolving the URL first.
 242   data_source_.reset(new BufferedDataSource(
 243       url,
 244       static_cast<BufferedResourceLoader::CORSMode>(cors_mode),
 245       main_task_runner_,
 246       frame_,
 247       media_log_.get(),
 248       &buffered_data_source_host_,
 249       base::Bind(&WebMediaPlayerImpl::NotifyDownloading, AsWeakPtr())));
 250   data_source_->SetPreload(preload_);
 251   data_source_->Initialize(
 252       base::Bind(&WebMediaPlayerImpl::DataSourceInitialized, AsWeakPtr()));
 253 }
 254
 255 void WebMediaPlayerImpl::play() {
 256   DVLOG(1) << __FUNCTION__;
 257   DCHECK(main_task_runner_->BelongsToCurrentThread());
 258
 259   paused_ = false;
 260   pipeline_.SetPlaybackRate(playback_rate_);
 261   if (data_source_)
 262     data_source_->MediaIsPlaying();
 263
 264   media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::PLAY));
 265
 266   if (delegate_ && playback_rate_ > 0)
 267     delegate_->DidPlay(this);
 268 }
 269
 270 void WebMediaPlayerImpl::pause() {
 271   DVLOG(1) << __FUNCTION__;
 272   DCHECK(main_task_runner_->BelongsToCurrentThread());
 273
 274   const bool was_already_paused = paused_ || playback_rate_ == 0;
 275   paused_ = true;
 276   pipeline_.SetPlaybackRate(0.0);
 277   if (data_source_)
 278     data_source_->MediaIsPaused();
 279   UpdatePausedTime();
 280
 281   media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::PAUSE));
 282
 283   if (!was_already_paused && delegate_)
 284     delegate_->DidPause(this);
 285 }
 286
 287 bool WebMediaPlayerImpl::supportsSave() const {
 288   DCHECK(main_task_runner_->BelongsToCurrentThread());
 289   return supports_save_;
 290 }
 291
 292 void WebMediaPlayerImpl::seek(double seconds) {
 293   DVLOG(1) << __FUNCTION__ << "(" << seconds << "s)";
 294   DCHECK(main_task_runner_->BelongsToCurrentThread());
 295
 296   ended_ = false;
 297
 298   ReadyState old_state = ready_state_;
 299   if (ready_state_ > WebMediaPlayer::ReadyStateHaveMetadata)
 300     SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
 301
 302   base::TimeDelta new_seek_time = base::TimeDelta::FromSecondsD(seconds);
 303
 304   if (seeking_) {
 305     if (new_seek_time == seek_time_) {
 306       if (chunk_demuxer_) {
 307         // Don't suppress any redundant in-progress MSE seek. There could have
 308         // been changes to the underlying buffers after seeking the demuxer and
 309         // before receiving OnPipelineSeeked() for the currently in-progress
 310         // seek.
 311         MEDIA_LOG(DEBUG, media_log_)
 312             << "Detected MediaSource seek to same time as in-progress seek to "
 313             << seek_time_ << ".";
 314       } else {
 315         // Suppress all redundant seeks if unrestricted by media source demuxer
 316         // API.
 317         pending_seek_ = false;
 318         pending_seek_time_ = base::TimeDelta();
 319         return;
 320       }
 321     }
 322
 323     pending_seek_ = true;
 324     pending_seek_time_ = new_seek_time;
 325     if (chunk_demuxer_)
 326       chunk_demuxer_->CancelPendingSeek(pending_seek_time_);
 327     return;
 328   }
 329
 330   media_log_->AddEvent(media_log_->CreateSeekEvent(seconds));
 331
 332   // Update our paused time.
 333   // For non-MSE playbacks, in paused state ignore the seek operations to
 334   // current time if the loading is completed and generate
 335   // OnPipelineBufferingStateChanged event to eventually fire seeking and seeked
 336   // events. We don't short-circuit MSE seeks in this logic because the
 337   // underlying buffers around the seek time might have changed (or even been
 338   // removed) since previous seek/preroll/pause action, and the pipeline might
 339   // need to flush so the new buffers are decoded and rendered instead of the
 340   // old ones.
 341   if (paused_) {
 342     if (paused_time_ != new_seek_time || chunk_demuxer_) {
 343       paused_time_ = new_seek_time;
 344     } else if (old_state == ReadyStateHaveEnoughData) {
 345       main_task_runner_->PostTask(
 346           FROM_HERE,
 347           base::Bind(&WebMediaPlayerImpl::OnPipelineBufferingStateChanged,
 348                      AsWeakPtr(), BUFFERING_HAVE_ENOUGH));
 349       return;
 350     }
 351   }
 352
 353   seeking_ = true;
 354   seek_time_ = new_seek_time;
 355
 356   if (chunk_demuxer_)
 357     chunk_demuxer_->StartWaitingForSeek(seek_time_);
 358
 359   // Kick off the asynchronous seek!
 360   pipeline_.Seek(seek_time_, BIND_TO_RENDER_LOOP1(
 361                                  &WebMediaPlayerImpl::OnPipelineSeeked, true));
 362 }
 363
 364 void WebMediaPlayerImpl::setRate(double rate) {
 365   DVLOG(1) << __FUNCTION__ << "(" << rate << ")";
 366   DCHECK(main_task_runner_->BelongsToCurrentThread());
 367
 368   // TODO(kylep): Remove when support for negatives is added. Also, modify the
 369   // following checks so rewind uses reasonable values also.
 370   if (rate < 0.0)
 371     return;
 372
 373   // Limit rates to reasonable values by clamping.
 374   if (rate != 0.0) {
 375     if (rate < kMinRate)
 376       rate = kMinRate;
 377     else if (rate > kMaxRate)
 378       rate = kMaxRate;
 379     if (playback_rate_ == 0 && !paused_ && delegate_)
 380       delegate_->DidPlay(this);
 381   } else if (playback_rate_ != 0 && !paused_ && delegate_) {
 382     delegate_->DidPause(this);
 383   }
 384
 385   playback_rate_ = rate;
 386   if (!paused_) {
 387     pipeline_.SetPlaybackRate(rate);
 388     if (data_source_)
 389       data_source_->MediaPlaybackRateChanged(rate);
 390   }
 391 }
 392
 393 void WebMediaPlayerImpl::setVolume(double volume) {
 394   DVLOG(1) << __FUNCTION__ << "(" << volume << ")";
 395   DCHECK(main_task_runner_->BelongsToCurrentThread());
 396
 397   pipeline_.SetVolume(volume);
 398 }
 399
 400 void WebMediaPlayerImpl::setSinkId(const blink::WebString& device_id,
 401                                    WebSetSinkIdCB* web_callback) {
 402   DCHECK(main_task_runner_->BelongsToCurrentThread());
 403   DVLOG(1) << __FUNCTION__;
 404   media::SwitchOutputDeviceCB callback =
 405       media::ConvertToSwitchOutputDeviceCB(web_callback);
 406   OutputDevice* output_device = audio_source_provider_->GetOutputDevice();
 407   if (output_device) {
 408     std::string device_id_str(device_id.utf8());
 409     GURL security_origin(frame_->securityOrigin().toString().utf8());
 410     output_device->SwitchOutputDevice(device_id_str, security_origin, callback);
 411   } else {
 412     callback.Run(SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED);
 413   }
 414 }
 415
 416 #define STATIC_ASSERT_MATCHING_ENUM(webkit_name, chromium_name) \
 417     static_assert(static_cast<int>(WebMediaPlayer::webkit_name) == \
 418                   static_cast<int>(BufferedDataSource::chromium_name), \
 419                   "mismatching enum values: " #webkit_name)
 420 STATIC_ASSERT_MATCHING_ENUM(PreloadNone, NONE);
 421 STATIC_ASSERT_MATCHING_ENUM(PreloadMetaData, METADATA);
 422 STATIC_ASSERT_MATCHING_ENUM(PreloadAuto, AUTO);
 423 #undef STATIC_ASSERT_MATCHING_ENUM
 424
 425 void WebMediaPlayerImpl::setPreload(WebMediaPlayer::Preload preload) {
 426   DVLOG(1) << __FUNCTION__ << "(" << preload << ")";
 427   DCHECK(main_task_runner_->BelongsToCurrentThread());
 428
 429   preload_ = static_cast<BufferedDataSource::Preload>(preload);
 430   if (data_source_)
 431     data_source_->SetPreload(preload_);
 432 }
 433
 434 bool WebMediaPlayerImpl::hasVideo() const {
 435   DCHECK(main_task_runner_->BelongsToCurrentThread());
 436
 437   return pipeline_metadata_.has_video;
 438 }
 439
 440 bool WebMediaPlayerImpl::hasAudio() const {
 441   DCHECK(main_task_runner_->BelongsToCurrentThread());
 442
 443   return pipeline_metadata_.has_audio;
 444 }
 445
 446 blink::WebSize WebMediaPlayerImpl::naturalSize() const {
 447   DCHECK(main_task_runner_->BelongsToCurrentThread());
 448
 449   return blink::WebSize(pipeline_metadata_.natural_size);
 450 }
 451
 452 bool WebMediaPlayerImpl::paused() const {
 453   DCHECK(main_task_runner_->BelongsToCurrentThread());
 454
 455   return pipeline_.GetPlaybackRate() == 0.0f;
 456 }
 457
 458 bool WebMediaPlayerImpl::seeking() const {
 459   DCHECK(main_task_runner_->BelongsToCurrentThread());
 460
 461   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
 462     return false;
 463
 464   return seeking_;
 465 }
 466
 467 double WebMediaPlayerImpl::duration() const {
 468   DCHECK(main_task_runner_->BelongsToCurrentThread());
 469
 470   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
 471     return std::numeric_limits<double>::quiet_NaN();
 472
 473   return GetPipelineDuration();
 474 }
 475
 476 double WebMediaPlayerImpl::timelineOffset() const {
 477   DCHECK(main_task_runner_->BelongsToCurrentThread());
 478
 479   if (pipeline_metadata_.timeline_offset.is_null())
 480     return std::numeric_limits<double>::quiet_NaN();
 481
 482   return pipeline_metadata_.timeline_offset.ToJsTime();
 483 }
 484
 485 double WebMediaPlayerImpl::currentTime() const {
 486   DCHECK(main_task_runner_->BelongsToCurrentThread());
 487   DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
 488
 489   // TODO(scherkus): Replace with an explicit ended signal to HTMLMediaElement,
 490   // see http://crbug.com/409280
 491   if (ended_)
 492     return duration();
 493
 494   // We know the current seek time better than pipeline: pipeline may processing
 495   // an earlier seek before a pending seek has been started, or it might not yet
 496   // have the current seek time returnable via GetMediaTime().
 497   if (seeking()) {
 498     return pending_seek_ ? pending_seek_time_.InSecondsF()
 499                          : seek_time_.InSecondsF();
 500   }
 501
 502   return (paused_ ? paused_time_ : pipeline_.GetMediaTime()).InSecondsF();
 503 }
 504
 505 WebMediaPlayer::NetworkState WebMediaPlayerImpl::networkState() const {
 506   DCHECK(main_task_runner_->BelongsToCurrentThread());
 507   return network_state_;
 508 }
 509
 510 WebMediaPlayer::ReadyState WebMediaPlayerImpl::readyState() const {
 511   DCHECK(main_task_runner_->BelongsToCurrentThread());
 512   return ready_state_;
 513 }
 514
 515 blink::WebTimeRanges WebMediaPlayerImpl::buffered() const {
 516   DCHECK(main_task_runner_->BelongsToCurrentThread());
 517
 518   Ranges<base::TimeDelta> buffered_time_ranges =
 519       pipeline_.GetBufferedTimeRanges();
 520
 521   const base::TimeDelta duration = pipeline_.GetMediaDuration();
 522   if (duration != kInfiniteDuration()) {
 523     buffered_data_source_host_.AddBufferedTimeRanges(
 524         &buffered_time_ranges, duration);
 525   }
 526   return ConvertToWebTimeRanges(buffered_time_ranges);
 527 }
 528
 529 blink::WebTimeRanges WebMediaPlayerImpl::seekable() const {
 530   DCHECK(main_task_runner_->BelongsToCurrentThread());
 531
 532   if (ready_state_ < WebMediaPlayer::ReadyStateHaveMetadata)
 533     return blink::WebTimeRanges();
 534
 535   const double seekable_end = duration();
 536
 537   // Allow a special exception for seeks to zero for streaming sources with a
 538   // finite duration; this allows looping to work.
 539   const bool allow_seek_to_zero = data_source_ && data_source_->IsStreaming() &&
 540                                   std::isfinite(seekable_end);
 541
 542   // TODO(dalecurtis): Technically this allows seeking on media which return an
 543   // infinite duration so long as DataSource::IsStreaming() is false.  While not
 544   // expected, disabling this breaks semi-live players, http://crbug.com/427412.
 545   const blink::WebTimeRange seekable_range(
 546       0.0, allow_seek_to_zero ? 0.0 : seekable_end);
 547   return blink::WebTimeRanges(&seekable_range, 1);
 548 }
 549
 550 bool WebMediaPlayerImpl::didLoadingProgress() {
 551   DCHECK(main_task_runner_->BelongsToCurrentThread());
 552   bool pipeline_progress = pipeline_.DidLoadingProgress();
 553   bool data_progress = buffered_data_source_host_.DidLoadingProgress();
 554   return pipeline_progress || data_progress;
 555 }
 556
 557 void WebMediaPlayerImpl::paint(blink::WebCanvas* canvas,
 558                                const blink::WebRect& rect,
 559                                unsigned char alpha,
 560                                SkXfermode::Mode mode) {
 561   DCHECK(main_task_runner_->BelongsToCurrentThread());
 562   TRACE_EVENT0("media", "WebMediaPlayerImpl:paint");
 563
 564   // TODO(scherkus): Clarify paint() API contract to better understand when and
 565   // why it's being called. For example, today paint() is called when:
 566   //   - We haven't reached HAVE_CURRENT_DATA and need to paint black
 567   //   - We're painting to a canvas
 568   // See http://crbug.com/341225 http://crbug.com/342621 for details.
 569   scoped_refptr<VideoFrame> video_frame = GetCurrentFrameFromCompositor();
 570
 571   gfx::Rect gfx_rect(rect);
 572   Context3D context_3d;
 573   if (video_frame.get() && video_frame->HasTextures()) {
 574     if (!context_3d_cb_.is_null())
 575       context_3d = context_3d_cb_.Run();
 576     // GPU Process crashed.
 577     if (!context_3d.gl)
 578       return;
 579   }
 580   skcanvas_video_renderer_.Paint(video_frame, canvas, gfx::RectF(gfx_rect),
 581                                  alpha, mode, pipeline_metadata_.video_rotation,
 582                                  context_3d);
 583 }
 584
 585 bool WebMediaPlayerImpl::hasSingleSecurityOrigin() const {
 586   if (data_source_)
 587     return data_source_->HasSingleOrigin();
 588   return true;
 589 }
 590
 591 bool WebMediaPlayerImpl::didPassCORSAccessCheck() const {
 592   if (data_source_)
 593     return data_source_->DidPassCORSAccessCheck();
 594   return false;
 595 }
 596
 597 double WebMediaPlayerImpl::mediaTimeForTimeValue(double timeValue) const {
 598   return base::TimeDelta::FromSecondsD(timeValue).InSecondsF();
 599 }
 600
 601 unsigned WebMediaPlayerImpl::decodedFrameCount() const {
 602   DCHECK(main_task_runner_->BelongsToCurrentThread());
 603
 604   PipelineStatistics stats = pipeline_.GetStatistics();
 605   return stats.video_frames_decoded;
 606 }
 607
 608 unsigned WebMediaPlayerImpl::droppedFrameCount() const {
 609   DCHECK(main_task_runner_->BelongsToCurrentThread());
 610
 611   PipelineStatistics stats = pipeline_.GetStatistics();
 612   return stats.video_frames_dropped;
 613 }
 614
 615 unsigned WebMediaPlayerImpl::audioDecodedByteCount() const {
 616   DCHECK(main_task_runner_->BelongsToCurrentThread());
 617
 618   PipelineStatistics stats = pipeline_.GetStatistics();
 619   return stats.audio_bytes_decoded;
 620 }
 621
 622 unsigned WebMediaPlayerImpl::videoDecodedByteCount() const {
 623   DCHECK(main_task_runner_->BelongsToCurrentThread());
 624
 625   PipelineStatistics stats = pipeline_.GetStatistics();
 626   return stats.video_bytes_decoded;
 627 }
 628
 629 bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
 630     blink::WebGraphicsContext3D* web_graphics_context,
 631     unsigned int texture,
 632     unsigned int internal_format,
 633     unsigned int type,
 634     bool premultiply_alpha,
 635     bool flip_y) {
 636   TRACE_EVENT0("media", "WebMediaPlayerImpl:copyVideoTextureToPlatformTexture");
 637
 638   scoped_refptr<VideoFrame> video_frame = GetCurrentFrameFromCompositor();
 639
 640   if (!video_frame.get() || !video_frame->HasTextures() ||
 641       media::VideoFrame::NumPlanes(video_frame->format()) != 1) {
 642     return false;
 643   }
 644
 645   // TODO(dshwang): need more elegant way to convert WebGraphicsContext3D to
 646   // GLES2Interface.
 647   gpu::gles2::GLES2Interface* gl =
 648       static_cast<gpu_blink::WebGraphicsContext3DImpl*>(web_graphics_context)
 649           ->GetGLInterface();
 650   SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
 651       gl, video_frame.get(), texture, internal_format, type, premultiply_alpha,
 652       flip_y);
 653   return true;
 654 }
 655
 656 WebMediaPlayer::MediaKeyException
 657 WebMediaPlayerImpl::generateKeyRequest(const WebString& key_system,
 658                                        const unsigned char* init_data,
 659                                        unsigned init_data_length) {
 660   DCHECK(main_task_runner_->BelongsToCurrentThread());
 661
 662   return encrypted_media_support_.GenerateKeyRequest(
 663       frame_, key_system, init_data, init_data_length);
 664 }
 665
 666 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::addKey(
 667     const WebString& key_system,
 668     const unsigned char* key,
 669     unsigned key_length,
 670     const unsigned char* init_data,
 671     unsigned init_data_length,
 672     const WebString& session_id) {
 673   DCHECK(main_task_runner_->BelongsToCurrentThread());
 674
 675   return encrypted_media_support_.AddKey(
 676       key_system, key, key_length, init_data, init_data_length, session_id);
 677 }
 678
 679 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::cancelKeyRequest(
 680     const WebString& key_system,
 681     const WebString& session_id) {
 682   DCHECK(main_task_runner_->BelongsToCurrentThread());
 683
 684   return encrypted_media_support_.CancelKeyRequest(key_system, session_id);
 685 }
 686
 687 void WebMediaPlayerImpl::setContentDecryptionModule(
 688     blink::WebContentDecryptionModule* cdm,
 689     blink::WebContentDecryptionModuleResult result) {
 690   DCHECK(main_task_runner_->BelongsToCurrentThread());
 691
 692   // Once the CDM is set it can't be cleared as there may be frames being
 693   // decrypted on other threads. So fail this request.
 694   // http://crbug.com/462365#c7.
 695   if (!cdm) {
 696     result.completeWithError(
 697         blink::WebContentDecryptionModuleExceptionInvalidStateError, 0,
 698         "The existing MediaKeys object cannot be removed at this time.");
 699     return;
 700   }
 701
 702   // Although unlikely, it is possible that multiple calls happen
 703   // simultaneously, so fail this call if there is already one pending.
 704   if (set_cdm_result_) {
 705     result.completeWithError(
 706         blink::WebContentDecryptionModuleExceptionInvalidStateError, 0,
 707         "Unable to set MediaKeys object at this time.");
 708     return;
 709   }
 710
 711   // Create a local copy of |result| to avoid problems with the callback
 712   // getting passed to the media thread and causing |result| to be destructed
 713   // on the wrong thread in some failure conditions.
 714   set_cdm_result_.reset(new blink::WebContentDecryptionModuleResult(result));
 715
 716   SetCdm(BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnCdmAttached),
 717          ToWebContentDecryptionModuleImpl(cdm)->GetCdmContext());
 718 }
 719
 720 void WebMediaPlayerImpl::OnEncryptedMediaInitData(
 721     EmeInitDataType init_data_type,
 722     const std::vector<uint8>& init_data) {
 723   DCHECK(init_data_type != EmeInitDataType::UNKNOWN);
 724
 725   // Do not fire "encrypted" event if encrypted media is not enabled.
 726   // TODO(xhwang): Handle this in |client_|.
 727   if (!blink::WebRuntimeFeatures::isPrefixedEncryptedMediaEnabled() &&
 728       !blink::WebRuntimeFeatures::isEncryptedMediaEnabled()) {
 729     return;
 730   }
 731
 732   // TODO(xhwang): Update this UMA name.
 733   UMA_HISTOGRAM_COUNTS("Media.EME.NeedKey", 1);
 734
 735   encrypted_media_support_.SetInitDataType(init_data_type);
 736
 737   encrypted_client_->encrypted(
 738       ConvertToWebInitDataType(init_data_type), vector_as_array(&init_data),
 739       base::saturated_cast<unsigned int>(init_data.size()));
 740 }
 741
 742 void WebMediaPlayerImpl::OnWaitingForDecryptionKey() {
 743   encrypted_client_->didBlockPlaybackWaitingForKey();
 744
 745   // TODO(jrummell): didResumePlaybackBlockedForKey() should only be called
 746   // when a key has been successfully added (e.g. OnSessionKeysChange() with
 747   // |has_additional_usable_key| = true). http://crbug.com/461903
 748   encrypted_client_->didResumePlaybackBlockedForKey();
 749 }
 750
 751 void WebMediaPlayerImpl::SetCdm(const CdmAttachedCB& cdm_attached_cb,
 752                                 CdmContext* cdm_context) {
 753   // If CDM initialization succeeded, tell the pipeline about it.
 754   if (cdm_context)
 755     pipeline_.SetCdm(cdm_context, cdm_attached_cb);
 756 }
 757
 758 void WebMediaPlayerImpl::OnCdmAttached(bool success) {
 759   if (success) {
 760     set_cdm_result_->complete();
 761     set_cdm_result_.reset();
 762     return;
 763   }
 764
 765   set_cdm_result_->completeWithError(
 766       blink::WebContentDecryptionModuleExceptionNotSupportedError, 0,
 767       "Unable to set MediaKeys object");
 768   set_cdm_result_.reset();
 769 }
 770
 771 void WebMediaPlayerImpl::OnPipelineSeeked(bool time_changed,
 772                                           PipelineStatus status) {
 773   DVLOG(1) << __FUNCTION__ << "(" << time_changed << ", " << status << ")";
 774   DCHECK(main_task_runner_->BelongsToCurrentThread());
 775   seeking_ = false;
 776   seek_time_ = base::TimeDelta();
 777   if (pending_seek_) {
 778     double pending_seek_seconds = pending_seek_time_.InSecondsF();
 779     pending_seek_ = false;
 780     pending_seek_time_ = base::TimeDelta();
 781     seek(pending_seek_seconds);
 782     return;
 783   }
 784
 785   if (status != PIPELINE_OK) {
 786     OnPipelineError(status);
 787     return;
 788   }
 789
 790   // Update our paused time.
 791   if (paused_)
 792     UpdatePausedTime();
 793
 794   should_notify_time_changed_ = time_changed;
 795 }
 796
 797 void WebMediaPlayerImpl::OnPipelineEnded() {
 798   DVLOG(1) << __FUNCTION__;
 799   DCHECK(main_task_runner_->BelongsToCurrentThread());
 800
 801   // Ignore state changes until we've completed all outstanding seeks.
 802   if (seeking_ || pending_seek_)
 803     return;
 804
 805   ended_ = true;
 806   client_->timeChanged();
 807 }
 808
 809 void WebMediaPlayerImpl::OnPipelineError(PipelineStatus error) {
 810   DCHECK(main_task_runner_->BelongsToCurrentThread());
 811   DCHECK_NE(error, PIPELINE_OK);
 812
 813   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing) {
 814     // Any error that occurs before reaching ReadyStateHaveMetadata should
 815     // be considered a format error.
 816     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
 817     return;
 818   }
 819
 820   SetNetworkState(PipelineErrorToNetworkState(error));
 821 }
 822
 823 void WebMediaPlayerImpl::OnPipelineMetadata(
 824     PipelineMetadata metadata) {
 825   DVLOG(1) << __FUNCTION__;
 826
 827   pipeline_metadata_ = metadata;
 828
 829   UMA_HISTOGRAM_ENUMERATION("Media.VideoRotation", metadata.video_rotation,
 830                             VIDEO_ROTATION_MAX + 1);
 831   SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
 832
 833   if (hasVideo()) {
 834     DCHECK(!video_weblayer_);
 835     scoped_refptr<cc::VideoLayer> layer =
 836         cc::VideoLayer::Create(cc_blink::WebLayerImpl::LayerSettings(),
 837                                compositor_, pipeline_metadata_.video_rotation);
 838
 839     if (pipeline_metadata_.video_rotation == VIDEO_ROTATION_90 ||
 840         pipeline_metadata_.video_rotation == VIDEO_ROTATION_270) {
 841       gfx::Size size = pipeline_metadata_.natural_size;
 842       pipeline_metadata_.natural_size = gfx::Size(size.height(), size.width());
 843     }
 844
 845     video_weblayer_.reset(new cc_blink::WebLayerImpl(layer));
 846     video_weblayer_->layer()->SetContentsOpaque(opaque_);
 847     video_weblayer_->SetContentsOpaqueIsFixed(true);
 848     client_->setWebLayer(video_weblayer_.get());
 849   }
 850 }
 851
 852 void WebMediaPlayerImpl::OnPipelineBufferingStateChanged(
 853     BufferingState buffering_state) {
 854   DVLOG(1) << __FUNCTION__ << "(" << buffering_state << ")";
 855
 856   // Ignore buffering state changes until we've completed all outstanding seeks.
 857   if (seeking_ || pending_seek_)
 858     return;
 859
 860   // TODO(scherkus): Handle other buffering states when Pipeline starts using
 861   // them and translate them ready state changes http://crbug.com/144683
 862   DCHECK_EQ(buffering_state, BUFFERING_HAVE_ENOUGH);
 863   SetReadyState(WebMediaPlayer::ReadyStateHaveEnoughData);
 864
 865   // Let the DataSource know we have enough data. It may use this information to
 866   // release unused network connections.
 867   if (data_source_)
 868     data_source_->OnBufferingHaveEnough();
 869
 870   // Blink expects a timeChanged() in response to a seek().
 871   if (should_notify_time_changed_)
 872     client_->timeChanged();
 873 }
 874
 875 void WebMediaPlayerImpl::OnDemuxerOpened() {
 876   DCHECK(main_task_runner_->BelongsToCurrentThread());
 877   client_->mediaSourceOpened(
 878       new WebMediaSourceImpl(chunk_demuxer_, media_log_));
 879 }
 880
 881 void WebMediaPlayerImpl::OnAddTextTrack(
 882     const TextTrackConfig& config,
 883     const AddTextTrackDoneCB& done_cb) {
 884   DCHECK(main_task_runner_->BelongsToCurrentThread());
 885
 886   const WebInbandTextTrackImpl::Kind web_kind =
 887       static_cast<WebInbandTextTrackImpl::Kind>(config.kind());
 888   const blink::WebString web_label =
 889       blink::WebString::fromUTF8(config.label());
 890   const blink::WebString web_language =
 891       blink::WebString::fromUTF8(config.language());
 892   const blink::WebString web_id =
 893       blink::WebString::fromUTF8(config.id());
 894
 895   scoped_ptr<WebInbandTextTrackImpl> web_inband_text_track(
 896       new WebInbandTextTrackImpl(web_kind, web_label, web_language, web_id));
 897
 898   scoped_ptr<TextTrack> text_track(new TextTrackImpl(
 899       main_task_runner_, client_, web_inband_text_track.Pass()));
 900
 901   done_cb.Run(text_track.Pass());
 902 }
 903
 904 void WebMediaPlayerImpl::DataSourceInitialized(bool success) {
 905   DCHECK(main_task_runner_->BelongsToCurrentThread());
 906
 907   if (!success) {
 908     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
 909     return;
 910   }
 911
 912   StartPipeline();
 913 }
 914
 915 void WebMediaPlayerImpl::NotifyDownloading(bool is_downloading) {
 916   if (!is_downloading && network_state_ == WebMediaPlayer::NetworkStateLoading)
 917     SetNetworkState(WebMediaPlayer::NetworkStateIdle);
 918   else if (is_downloading && network_state_ == WebMediaPlayer::NetworkStateIdle)
 919     SetNetworkState(WebMediaPlayer::NetworkStateLoading);
 920   media_log_->AddEvent(
 921       media_log_->CreateBooleanEvent(
 922           MediaLogEvent::NETWORK_ACTIVITY_SET,
 923           "is_downloading_data", is_downloading));
 924 }
 925
 926 void WebMediaPlayerImpl::StartPipeline() {
 927   DCHECK(main_task_runner_->BelongsToCurrentThread());
 928
 929   Demuxer::EncryptedMediaInitDataCB encrypted_media_init_data_cb =
 930       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnEncryptedMediaInitData);
 931
 932   // Figure out which demuxer to use.
 933   if (load_type_ != LoadTypeMediaSource) {
 934     DCHECK(!chunk_demuxer_);
 935     DCHECK(data_source_);
 936
 937     demuxer_.reset(new FFmpegDemuxer(media_task_runner_, data_source_.get(),
 938                                      encrypted_media_init_data_cb, media_log_));
 939   } else {
 940     DCHECK(!chunk_demuxer_);
 941     DCHECK(!data_source_);
 942
 943     chunk_demuxer_ = new ChunkDemuxer(
 944         BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDemuxerOpened),
 945         encrypted_media_init_data_cb, media_log_, true);
 946     demuxer_.reset(chunk_demuxer_);
 947   }
 948
 949   // ... and we're ready to go!
 950   seeking_ = true;
 951
 952   pipeline_.Start(
 953       demuxer_.get(), renderer_factory_->CreateRenderer(
 954                           media_task_runner_, worker_task_runner_,
 955                           audio_source_provider_.get(), compositor_),
 956       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineEnded),
 957       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineError),
 958       BIND_TO_RENDER_LOOP1(&WebMediaPlayerImpl::OnPipelineSeeked, false),
 959       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineMetadata),
 960       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineBufferingStateChanged),
 961       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDurationChanged),
 962       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnAddTextTrack),
 963       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnWaitingForDecryptionKey));
 964 }
 965
 966 void WebMediaPlayerImpl::SetNetworkState(WebMediaPlayer::NetworkState state) {
 967   DVLOG(1) << __FUNCTION__ << "(" << state << ")";
 968   DCHECK(main_task_runner_->BelongsToCurrentThread());
 969   network_state_ = state;
 970   // Always notify to ensure client has the latest value.
 971   client_->networkStateChanged();
 972 }
 973
 974 void WebMediaPlayerImpl::SetReadyState(WebMediaPlayer::ReadyState state) {
 975   DVLOG(1) << __FUNCTION__ << "(" << state << ")";
 976   DCHECK(main_task_runner_->BelongsToCurrentThread());
 977
 978   if (state == WebMediaPlayer::ReadyStateHaveEnoughData && data_source_ &&
 979       data_source_->assume_fully_buffered() &&
 980       network_state_ == WebMediaPlayer::NetworkStateLoading)
 981     SetNetworkState(WebMediaPlayer::NetworkStateLoaded);
 982
 983   ready_state_ = state;
 984   // Always notify to ensure client has the latest value.
 985   client_->readyStateChanged();
 986 }
 987
 988 blink::WebAudioSourceProvider* WebMediaPlayerImpl::audioSourceProvider() {
 989   return audio_source_provider_.get();
 990 }
 991
 992 double WebMediaPlayerImpl::GetPipelineDuration() const {
 993   base::TimeDelta duration = pipeline_.GetMediaDuration();
 994
 995   // Return positive infinity if the resource is unbounded.
 996   // http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#dom-media-duration
 997   if (duration == kInfiniteDuration())
 998     return std::numeric_limits<double>::infinity();
 999
1000   return duration.InSecondsF();
1001 }
1002
1003 void WebMediaPlayerImpl::OnDurationChanged() {
1004   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
1005     return;
1006
1007   client_->durationChanged();
1008 }
1009
1010 void WebMediaPlayerImpl::OnNaturalSizeChanged(gfx::Size size) {
1011   DCHECK(main_task_runner_->BelongsToCurrentThread());
1012   DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
1013   TRACE_EVENT0("media", "WebMediaPlayerImpl::OnNaturalSizeChanged");
1014
1015   media_log_->AddEvent(
1016       media_log_->CreateVideoSizeSetEvent(size.width(), size.height()));
1017   pipeline_metadata_.natural_size = size;
1018
1019   client_->sizeChanged();
1020 }
1021
1022 void WebMediaPlayerImpl::OnOpacityChanged(bool opaque) {
1023   DCHECK(main_task_runner_->BelongsToCurrentThread());
1024   DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
1025
1026   opaque_ = opaque;
1027   // Modify content opaqueness of cc::Layer directly so that
1028   // SetContentsOpaqueIsFixed is ignored.
1029   if (video_weblayer_)
1030     video_weblayer_->layer()->SetContentsOpaque(opaque_);
1031 }
1032
1033 static void GetCurrentFrameAndSignal(
1034     VideoFrameCompositor* compositor,
1035     scoped_refptr<VideoFrame>* video_frame_out,
1036     base::WaitableEvent* event) {
1037   TRACE_EVENT0("media", "GetCurrentFrameAndSignal");
1038   *video_frame_out = compositor->GetCurrentFrameAndUpdateIfStale();
1039   event->Signal();
1040 }
1041
1042 scoped_refptr<VideoFrame>
1043 WebMediaPlayerImpl::GetCurrentFrameFromCompositor() {
1044   TRACE_EVENT0("media", "WebMediaPlayerImpl::GetCurrentFrameFromCompositor");
1045   if (compositor_task_runner_->BelongsToCurrentThread())
1046     return compositor_->GetCurrentFrameAndUpdateIfStale();
1047
1048   // Use a posted task and waitable event instead of a lock otherwise
1049   // WebGL/Canvas can see different content than what the compositor is seeing.
1050   scoped_refptr<VideoFrame> video_frame;
1051   base::WaitableEvent event(false, false);
1052   compositor_task_runner_->PostTask(FROM_HERE,
1053                                     base::Bind(&GetCurrentFrameAndSignal,
1054                                                base::Unretained(compositor_),
1055                                                &video_frame,
1056                                                &event));
1057   event.Wait();
1058   return video_frame;
1059 }
1060
1061 void WebMediaPlayerImpl::UpdatePausedTime() {
1062   DCHECK(main_task_runner_->BelongsToCurrentThread());
1063
1064   // pause() may be called after playback has ended and the HTMLMediaElement
1065   // requires that currentTime() == duration() after ending.  We want to ensure
1066   // |paused_time_| matches currentTime() in this case or a future seek() may
1067   // incorrectly discard what it thinks is a seek to the existing time.
1068   paused_time_ =
1069       ended_ ? pipeline_.GetMediaDuration() : pipeline_.GetMediaTime();
1070 }
1071
1072 }  // namespace media