src/content/renderer/media/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 "content/renderer/media/webmediaplayer_impl.h"
   6
   7 #include <algorithm>
   8 #include <limits>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/bind.h"
  13 #include "base/callback.h"
  14 #include "base/callback_helpers.h"
  15 #include "base/command_line.h"
  16 #include "base/debug/alias.h"
  17 #include "base/debug/crash_logging.h"
  18 #include "base/debug/trace_event.h"
  19 #include "base/message_loop/message_loop_proxy.h"
  20 #include "base/metrics/histogram.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/synchronization/waitable_event.h"
  24 #include "cc/layers/video_layer.h"
  25 #include "content/public/common/content_switches.h"
  26 #include "content/public/renderer/render_frame.h"
  27 #include "content/renderer/compositor_bindings/web_layer_impl.h"
  28 #include "content/renderer/media/buffered_data_source.h"
  29 #include "content/renderer/media/crypto/key_systems.h"
  30 #include "content/renderer/media/render_media_log.h"
  31 #include "content/renderer/media/texttrack_impl.h"
  32 #include "content/renderer/media/webaudiosourceprovider_impl.h"
  33 #include "content/renderer/media/webcontentdecryptionmodule_impl.h"
  34 #include "content/renderer/media/webinbandtexttrack_impl.h"
  35 #include "content/renderer/media/webmediaplayer_delegate.h"
  36 #include "content/renderer/media/webmediaplayer_params.h"
  37 #include "content/renderer/media/webmediaplayer_util.h"
  38 #include "content/renderer/media/webmediasource_impl.h"
  39 #include "content/renderer/pepper/pepper_webplugin_impl.h"
  40 #include "content/renderer/render_thread_impl.h"
  41 #include "gpu/GLES2/gl2extchromium.h"
  42 #include "gpu/command_buffer/common/mailbox_holder.h"
  43 #include "media/audio/null_audio_sink.h"
  44 #include "media/base/audio_hardware_config.h"
  45 #include "media/base/bind_to_current_loop.h"
  46 #include "media/base/filter_collection.h"
  47 #include "media/base/limits.h"
  48 #include "media/base/media_log.h"
  49 #include "media/base/media_switches.h"
  50 #include "media/base/pipeline.h"
  51 #include "media/base/text_renderer.h"
  52 #include "media/base/video_frame.h"
  53 #include "media/filters/audio_renderer_impl.h"
  54 #include "media/filters/chunk_demuxer.h"
  55 #include "media/filters/ffmpeg_audio_decoder.h"
  56 #include "media/filters/ffmpeg_demuxer.h"
  57 #include "media/filters/ffmpeg_video_decoder.h"
  58 #include "media/filters/gpu_video_accelerator_factories.h"
  59 #include "media/filters/gpu_video_decoder.h"
  60 #include "media/filters/opus_audio_decoder.h"
  61 #include "media/filters/video_renderer_impl.h"
  62 #include "media/filters/vpx_video_decoder.h"
  63 #include "third_party/WebKit/public/platform/WebContentDecryptionModule.h"
  64 #include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
  65 #include "third_party/WebKit/public/platform/WebMediaSource.h"
  66 #include "third_party/WebKit/public/platform/WebRect.h"
  67 #include "third_party/WebKit/public/platform/WebSize.h"
  68 #include "third_party/WebKit/public/platform/WebString.h"
  69 #include "third_party/WebKit/public/platform/WebURL.h"
  70 #include "third_party/WebKit/public/web/WebDocument.h"
  71 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  72 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  73 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  74 #include "third_party/WebKit/public/web/WebView.h"
  75 #include "v8/include/v8.h"
  76
  77 #if defined(ENABLE_PEPPER_CDMS)
  78 #include "content/renderer/media/crypto/pepper_cdm_wrapper_impl.h"
  79 #endif
  80
  81 using blink::WebCanvas;
  82 using blink::WebMediaPlayer;
  83 using blink::WebRect;
  84 using blink::WebSize;
  85 using blink::WebString;
  86 using media::PipelineStatus;
  87
  88 namespace {
  89
  90 // Amount of extra memory used by each player instance reported to V8.
  91 // It is not exact number -- first, it differs on different platforms,
  92 // and second, it is very hard to calculate. Instead, use some arbitrary
  93 // value that will cause garbage collection from time to time. We don't want
  94 // it to happen on every allocation, but don't want 5k players to sit in memory
  95 // either. Looks that chosen constant achieves both goals, at least for audio
  96 // objects. (Do not worry about video objects yet, JS programs do not create
  97 // thousands of them...)
  98 const int kPlayerExtraMemory = 1024 * 1024;
  99
 100 // Limits the range of playback rate.
 101 //
 102 // TODO(kylep): Revisit these.
 103 //
 104 // Vista has substantially lower performance than XP or Windows7.  If you speed
 105 // up a video too much, it can't keep up, and rendering stops updating except on
 106 // the time bar. For really high speeds, audio becomes a bottleneck and we just
 107 // use up the data we have, which may not achieve the speed requested, but will
 108 // not crash the tab.
 109 //
 110 // A very slow speed, ie 0.00000001x, causes the machine to lock up. (It seems
 111 // like a busy loop). It gets unresponsive, although its not completely dead.
 112 //
 113 // Also our timers are not very accurate (especially for ogg), which becomes
 114 // evident at low speeds and on Vista. Since other speeds are risky and outside
 115 // the norms, we think 1/16x to 16x is a safe and useful range for now.
 116 const double kMinRate = 0.0625;
 117 const double kMaxRate = 16.0;
 118
 119 // Prefix for histograms related to Encrypted Media Extensions.
 120 const char* kMediaEme = "Media.EME.";
 121
 122 class SyncPointClientImpl : public media::VideoFrame::SyncPointClient {
 123  public:
 124   explicit SyncPointClientImpl(
 125       blink::WebGraphicsContext3D* web_graphics_context)
 126       : web_graphics_context_(web_graphics_context) {}
 127   virtual ~SyncPointClientImpl() {}
 128   virtual uint32 InsertSyncPoint() OVERRIDE {
 129     return web_graphics_context_->insertSyncPoint();
 130   }
 131   virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE {
 132     web_graphics_context_->waitSyncPoint(sync_point);
 133   }
 134
 135  private:
 136   blink::WebGraphicsContext3D* web_graphics_context_;
 137 };
 138
 139 // Used for calls to decryptor_ready_cb where the result can be ignored.
 140 void DoNothing(bool) {
 141 }
 142
 143 }  // namespace
 144
 145 namespace content {
 146
 147 class BufferedDataSourceHostImpl;
 148
 149 #define COMPILE_ASSERT_MATCHING_ENUM(name) \
 150   COMPILE_ASSERT(static_cast<int>(WebMediaPlayer::CORSMode ## name) == \
 151                  static_cast<int>(BufferedResourceLoader::k ## name), \
 152                  mismatching_enums)
 153 COMPILE_ASSERT_MATCHING_ENUM(Unspecified);
 154 COMPILE_ASSERT_MATCHING_ENUM(Anonymous);
 155 COMPILE_ASSERT_MATCHING_ENUM(UseCredentials);
 156 #undef COMPILE_ASSERT_MATCHING_ENUM
 157
 158 #define BIND_TO_RENDER_LOOP(function) \
 159   (DCHECK(main_loop_->BelongsToCurrentThread()), \
 160   media::BindToCurrentLoop(base::Bind(function, AsWeakPtr())))
 161
 162 #define BIND_TO_RENDER_LOOP1(function, arg1) \
 163   (DCHECK(main_loop_->BelongsToCurrentThread()), \
 164   media::BindToCurrentLoop(base::Bind(function, AsWeakPtr(), arg1)))
 165
 166 static void LogMediaSourceError(const scoped_refptr<media::MediaLog>& media_log,
 167                                 const std::string& error) {
 168   media_log->AddEvent(media_log->CreateMediaSourceErrorEvent(error));
 169 }
 170
 171 WebMediaPlayerImpl::WebMediaPlayerImpl(
 172     blink::WebLocalFrame* frame,
 173     blink::WebMediaPlayerClient* client,
 174     base::WeakPtr<WebMediaPlayerDelegate> delegate,
 175     const WebMediaPlayerParams& params)
 176     : frame_(frame),
 177       network_state_(WebMediaPlayer::NetworkStateEmpty),
 178       ready_state_(WebMediaPlayer::ReadyStateHaveNothing),
 179       preload_(AUTO),
 180       main_loop_(base::MessageLoopProxy::current()),
 181       media_loop_(
 182           RenderThreadImpl::current()->GetMediaThreadMessageLoopProxy()),
 183       media_log_(new RenderMediaLog()),
 184       pipeline_(media_loop_, media_log_.get()),
 185       load_type_(LoadTypeURL),
 186       opaque_(false),
 187       paused_(true),
 188       seeking_(false),
 189       playback_rate_(0.0f),
 190       pending_seek_(false),
 191       pending_seek_seconds_(0.0f),
 192       should_notify_time_changed_(false),
 193       client_(client),
 194       delegate_(delegate),
 195       defer_load_cb_(params.defer_load_cb()),
 196       incremented_externally_allocated_memory_(false),
 197       gpu_factories_(RenderThreadImpl::current()->GetGpuFactories()),
 198       supports_save_(true),
 199       chunk_demuxer_(NULL),
 200       // Threaded compositing isn't enabled universally yet.
 201       compositor_task_runner_(
 202           RenderThreadImpl::current()->compositor_message_loop_proxy()
 203               ? RenderThreadImpl::current()->compositor_message_loop_proxy()
 204               : base::MessageLoopProxy::current()),
 205       compositor_(new VideoFrameCompositor(
 206           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNaturalSizeChanged),
 207           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnOpacityChanged))),
 208       text_track_index_(0),
 209       web_cdm_(NULL) {
 210   media_log_->AddEvent(
 211       media_log_->CreateEvent(media::MediaLogEvent::WEBMEDIAPLAYER_CREATED));
 212
 213   // |gpu_factories_| requires that its entry points be called on its
 214   // |GetTaskRunner()|.  Since |pipeline_| will own decoders created from the
 215   // factories, require that their message loops are identical.
 216   DCHECK(!gpu_factories_ || (gpu_factories_->GetTaskRunner() == media_loop_));
 217
 218   // Let V8 know we started new thread if we did not do it yet.
 219   // Made separate task to avoid deletion of player currently being created.
 220   // Also, delaying GC until after player starts gets rid of starting lag --
 221   // collection happens in parallel with playing.
 222   //
 223   // TODO(enal): remove when we get rid of per-audio-stream thread.
 224   main_loop_->PostTask(
 225       FROM_HERE,
 226       base::Bind(&WebMediaPlayerImpl::IncrementExternallyAllocatedMemory,
 227                  AsWeakPtr()));
 228
 229   // Use the null sink if no sink was provided.
 230   audio_source_provider_ = new WebAudioSourceProviderImpl(
 231       params.audio_renderer_sink().get()
 232           ? params.audio_renderer_sink()
 233           : new media::NullAudioSink(media_loop_));
 234 }
 235
 236 WebMediaPlayerImpl::~WebMediaPlayerImpl() {
 237   client_->setWebLayer(NULL);
 238
 239   DCHECK(main_loop_->BelongsToCurrentThread());
 240   media_log_->AddEvent(
 241       media_log_->CreateEvent(media::MediaLogEvent::WEBMEDIAPLAYER_DESTROYED));
 242
 243   if (delegate_.get())
 244     delegate_->PlayerGone(this);
 245
 246   // Abort any pending IO so stopping the pipeline doesn't get blocked.
 247   if (data_source_)
 248     data_source_->Abort();
 249   if (chunk_demuxer_) {
 250     chunk_demuxer_->Shutdown();
 251     chunk_demuxer_ = NULL;
 252   }
 253
 254   gpu_factories_ = NULL;
 255
 256   // Make sure to kill the pipeline so there's no more media threads running.
 257   // Note: stopping the pipeline might block for a long time.
 258   base::WaitableEvent waiter(false, false);
 259   pipeline_.Stop(
 260       base::Bind(&base::WaitableEvent::Signal, base::Unretained(&waiter)));
 261   waiter.Wait();
 262
 263   compositor_task_runner_->DeleteSoon(FROM_HERE, compositor_);
 264
 265   // Let V8 know we are not using extra resources anymore.
 266   if (incremented_externally_allocated_memory_) {
 267     v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(
 268         -kPlayerExtraMemory);
 269     incremented_externally_allocated_memory_ = false;
 270   }
 271 }
 272
 273 void WebMediaPlayerImpl::load(LoadType load_type, const blink::WebURL& url,
 274                               CORSMode cors_mode) {
 275   DVLOG(1) << __FUNCTION__ << "(" << load_type << ", " << url << ", "
 276            << cors_mode << ")";
 277   if (!defer_load_cb_.is_null()) {
 278     defer_load_cb_.Run(base::Bind(
 279         &WebMediaPlayerImpl::DoLoad, AsWeakPtr(), load_type, url, cors_mode));
 280     return;
 281   }
 282   DoLoad(load_type, url, cors_mode);
 283 }
 284
 285 void WebMediaPlayerImpl::DoLoad(LoadType load_type,
 286                                 const blink::WebURL& url,
 287                                 CORSMode cors_mode) {
 288   DCHECK(main_loop_->BelongsToCurrentThread());
 289
 290   GURL gurl(url);
 291   ReportMediaSchemeUma(gurl);
 292
 293   // Set subresource URL for crash reporting.
 294   base::debug::SetCrashKeyValue("subresource_url", gurl.spec());
 295
 296   load_type_ = load_type;
 297
 298   SetNetworkState(WebMediaPlayer::NetworkStateLoading);
 299   SetReadyState(WebMediaPlayer::ReadyStateHaveNothing);
 300   media_log_->AddEvent(media_log_->CreateLoadEvent(url.spec()));
 301
 302   // Media source pipelines can start immediately.
 303   if (load_type == LoadTypeMediaSource) {
 304     supports_save_ = false;
 305     StartPipeline();
 306     return;
 307   }
 308
 309   // Otherwise it's a regular request which requires resolving the URL first.
 310   data_source_.reset(new BufferedDataSource(
 311       url,
 312       static_cast<BufferedResourceLoader::CORSMode>(cors_mode),
 313       main_loop_,
 314       frame_,
 315       media_log_.get(),
 316       &buffered_data_source_host_,
 317       base::Bind(&WebMediaPlayerImpl::NotifyDownloading, AsWeakPtr())));
 318   data_source_->Initialize(
 319       base::Bind(&WebMediaPlayerImpl::DataSourceInitialized, AsWeakPtr()));
 320   data_source_->SetPreload(preload_);
 321 }
 322
 323 void WebMediaPlayerImpl::play() {
 324   DVLOG(1) << __FUNCTION__;
 325   DCHECK(main_loop_->BelongsToCurrentThread());
 326
 327   paused_ = false;
 328   pipeline_.SetPlaybackRate(playback_rate_);
 329   if (data_source_)
 330     data_source_->MediaIsPlaying();
 331
 332   media_log_->AddEvent(media_log_->CreateEvent(media::MediaLogEvent::PLAY));
 333
 334   if (delegate_.get())
 335     delegate_->DidPlay(this);
 336 }
 337
 338 void WebMediaPlayerImpl::pause() {
 339   DVLOG(1) << __FUNCTION__;
 340   DCHECK(main_loop_->BelongsToCurrentThread());
 341
 342   paused_ = true;
 343   pipeline_.SetPlaybackRate(0.0f);
 344   if (data_source_)
 345     data_source_->MediaIsPaused();
 346   paused_time_ = pipeline_.GetMediaTime();
 347
 348   media_log_->AddEvent(media_log_->CreateEvent(media::MediaLogEvent::PAUSE));
 349
 350   if (delegate_.get())
 351     delegate_->DidPause(this);
 352 }
 353
 354 bool WebMediaPlayerImpl::supportsSave() const {
 355   DCHECK(main_loop_->BelongsToCurrentThread());
 356   return supports_save_;
 357 }
 358
 359 void WebMediaPlayerImpl::seek(double seconds) {
 360   DVLOG(1) << __FUNCTION__ << "(" << seconds << ")";
 361   DCHECK(main_loop_->BelongsToCurrentThread());
 362
 363   if (ready_state_ > WebMediaPlayer::ReadyStateHaveMetadata)
 364     SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
 365
 366   base::TimeDelta seek_time = ConvertSecondsToTimestamp(seconds);
 367
 368   if (seeking_) {
 369     pending_seek_ = true;
 370     pending_seek_seconds_ = seconds;
 371     if (chunk_demuxer_)
 372       chunk_demuxer_->CancelPendingSeek(seek_time);
 373     return;
 374   }
 375
 376   media_log_->AddEvent(media_log_->CreateSeekEvent(seconds));
 377
 378   // Update our paused time.
 379   if (paused_)
 380     paused_time_ = seek_time;
 381
 382   seeking_ = true;
 383
 384   if (chunk_demuxer_)
 385     chunk_demuxer_->StartWaitingForSeek(seek_time);
 386
 387   // Kick off the asynchronous seek!
 388   pipeline_.Seek(
 389       seek_time,
 390       BIND_TO_RENDER_LOOP1(&WebMediaPlayerImpl::OnPipelineSeeked, true));
 391 }
 392
 393 void WebMediaPlayerImpl::setRate(double rate) {
 394   DVLOG(1) << __FUNCTION__ << "(" << rate << ")";
 395   DCHECK(main_loop_->BelongsToCurrentThread());
 396
 397   // TODO(kylep): Remove when support for negatives is added. Also, modify the
 398   // following checks so rewind uses reasonable values also.
 399   if (rate < 0.0)
 400     return;
 401
 402   // Limit rates to reasonable values by clamping.
 403   if (rate != 0.0) {
 404     if (rate < kMinRate)
 405       rate = kMinRate;
 406     else if (rate > kMaxRate)
 407       rate = kMaxRate;
 408   }
 409
 410   playback_rate_ = rate;
 411   if (!paused_) {
 412     pipeline_.SetPlaybackRate(rate);
 413     if (data_source_)
 414       data_source_->MediaPlaybackRateChanged(rate);
 415   }
 416 }
 417
 418 void WebMediaPlayerImpl::setVolume(double volume) {
 419   DVLOG(1) << __FUNCTION__ << "(" << volume << ")";
 420   DCHECK(main_loop_->BelongsToCurrentThread());
 421
 422   pipeline_.SetVolume(volume);
 423 }
 424
 425 #define COMPILE_ASSERT_MATCHING_ENUM(webkit_name, chromium_name) \
 426     COMPILE_ASSERT(static_cast<int>(WebMediaPlayer::webkit_name) == \
 427                    static_cast<int>(content::chromium_name), \
 428                    mismatching_enums)
 429 COMPILE_ASSERT_MATCHING_ENUM(PreloadNone, NONE);
 430 COMPILE_ASSERT_MATCHING_ENUM(PreloadMetaData, METADATA);
 431 COMPILE_ASSERT_MATCHING_ENUM(PreloadAuto, AUTO);
 432 #undef COMPILE_ASSERT_MATCHING_ENUM
 433
 434 void WebMediaPlayerImpl::setPreload(WebMediaPlayer::Preload preload) {
 435   DVLOG(1) << __FUNCTION__ << "(" << preload << ")";
 436   DCHECK(main_loop_->BelongsToCurrentThread());
 437
 438   preload_ = static_cast<content::Preload>(preload);
 439   if (data_source_)
 440     data_source_->SetPreload(preload_);
 441 }
 442
 443 bool WebMediaPlayerImpl::hasVideo() const {
 444   DCHECK(main_loop_->BelongsToCurrentThread());
 445
 446   return pipeline_metadata_.has_video;
 447 }
 448
 449 bool WebMediaPlayerImpl::hasAudio() const {
 450   DCHECK(main_loop_->BelongsToCurrentThread());
 451
 452   return pipeline_metadata_.has_audio;
 453 }
 454
 455 blink::WebSize WebMediaPlayerImpl::naturalSize() const {
 456   DCHECK(main_loop_->BelongsToCurrentThread());
 457
 458   return blink::WebSize(pipeline_metadata_.natural_size);
 459 }
 460
 461 bool WebMediaPlayerImpl::paused() const {
 462   DCHECK(main_loop_->BelongsToCurrentThread());
 463
 464   return pipeline_.GetPlaybackRate() == 0.0f;
 465 }
 466
 467 bool WebMediaPlayerImpl::seeking() const {
 468   DCHECK(main_loop_->BelongsToCurrentThread());
 469
 470   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
 471     return false;
 472
 473   return seeking_;
 474 }
 475
 476 double WebMediaPlayerImpl::duration() const {
 477   DCHECK(main_loop_->BelongsToCurrentThread());
 478
 479   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
 480     return std::numeric_limits<double>::quiet_NaN();
 481
 482   return GetPipelineDuration();
 483 }
 484
 485 double WebMediaPlayerImpl::timelineOffset() const {
 486   DCHECK(main_loop_->BelongsToCurrentThread());
 487
 488   if (pipeline_metadata_.timeline_offset.is_null())
 489     return std::numeric_limits<double>::quiet_NaN();
 490
 491   return pipeline_metadata_.timeline_offset.ToJsTime();
 492 }
 493
 494 double WebMediaPlayerImpl::currentTime() const {
 495   DCHECK(main_loop_->BelongsToCurrentThread());
 496   return (paused_ ? paused_time_ : pipeline_.GetMediaTime()).InSecondsF();
 497 }
 498
 499 WebMediaPlayer::NetworkState WebMediaPlayerImpl::networkState() const {
 500   DCHECK(main_loop_->BelongsToCurrentThread());
 501   return network_state_;
 502 }
 503
 504 WebMediaPlayer::ReadyState WebMediaPlayerImpl::readyState() const {
 505   DCHECK(main_loop_->BelongsToCurrentThread());
 506   return ready_state_;
 507 }
 508
 509 blink::WebTimeRanges WebMediaPlayerImpl::buffered() const {
 510   DCHECK(main_loop_->BelongsToCurrentThread());
 511   media::Ranges<base::TimeDelta> buffered_time_ranges =
 512       pipeline_.GetBufferedTimeRanges();
 513   buffered_data_source_host_.AddBufferedTimeRanges(
 514       &buffered_time_ranges, pipeline_.GetMediaDuration());
 515   return ConvertToWebTimeRanges(buffered_time_ranges);
 516 }
 517
 518 double WebMediaPlayerImpl::maxTimeSeekable() const {
 519   DCHECK(main_loop_->BelongsToCurrentThread());
 520
 521   // If we haven't even gotten to ReadyStateHaveMetadata yet then just
 522   // return 0 so that the seekable range is empty.
 523   if (ready_state_ < WebMediaPlayer::ReadyStateHaveMetadata)
 524     return 0.0;
 525
 526   // We don't support seeking in streaming media.
 527   if (data_source_ && data_source_->IsStreaming())
 528     return 0.0;
 529   return duration();
 530 }
 531
 532 bool WebMediaPlayerImpl::didLoadingProgress() {
 533   DCHECK(main_loop_->BelongsToCurrentThread());
 534   bool pipeline_progress = pipeline_.DidLoadingProgress();
 535   bool data_progress = buffered_data_source_host_.DidLoadingProgress();
 536   return pipeline_progress || data_progress;
 537 }
 538
 539 void WebMediaPlayerImpl::paint(WebCanvas* canvas,
 540                                const WebRect& rect,
 541                                unsigned char alpha) {
 542   DCHECK(main_loop_->BelongsToCurrentThread());
 543   TRACE_EVENT0("media", "WebMediaPlayerImpl:paint");
 544
 545   // TODO(scherkus): Clarify paint() API contract to better understand when and
 546   // why it's being called. For example, today paint() is called when:
 547   //   - We haven't reached HAVE_CURRENT_DATA and need to paint black
 548   //   - We're painting to a canvas
 549   // See http://crbug.com/341225 http://crbug.com/342621 for details.
 550   scoped_refptr<media::VideoFrame> video_frame =
 551       GetCurrentFrameFromCompositor();
 552
 553   gfx::Rect gfx_rect(rect);
 554
 555   skcanvas_video_renderer_.Paint(video_frame.get(),
 556                                  canvas,
 557                                  gfx_rect,
 558                                  alpha,
 559                                  pipeline_metadata_.video_rotation);
 560 }
 561
 562 bool WebMediaPlayerImpl::hasSingleSecurityOrigin() const {
 563   if (data_source_)
 564     return data_source_->HasSingleOrigin();
 565   return true;
 566 }
 567
 568 bool WebMediaPlayerImpl::didPassCORSAccessCheck() const {
 569   if (data_source_)
 570     return data_source_->DidPassCORSAccessCheck();
 571   return false;
 572 }
 573
 574 double WebMediaPlayerImpl::mediaTimeForTimeValue(double timeValue) const {
 575   return ConvertSecondsToTimestamp(timeValue).InSecondsF();
 576 }
 577
 578 unsigned WebMediaPlayerImpl::decodedFrameCount() const {
 579   DCHECK(main_loop_->BelongsToCurrentThread());
 580
 581   media::PipelineStatistics stats = pipeline_.GetStatistics();
 582   return stats.video_frames_decoded;
 583 }
 584
 585 unsigned WebMediaPlayerImpl::droppedFrameCount() const {
 586   DCHECK(main_loop_->BelongsToCurrentThread());
 587
 588   media::PipelineStatistics stats = pipeline_.GetStatistics();
 589   return stats.video_frames_dropped;
 590 }
 591
 592 unsigned WebMediaPlayerImpl::audioDecodedByteCount() const {
 593   DCHECK(main_loop_->BelongsToCurrentThread());
 594
 595   media::PipelineStatistics stats = pipeline_.GetStatistics();
 596   return stats.audio_bytes_decoded;
 597 }
 598
 599 unsigned WebMediaPlayerImpl::videoDecodedByteCount() const {
 600   DCHECK(main_loop_->BelongsToCurrentThread());
 601
 602   media::PipelineStatistics stats = pipeline_.GetStatistics();
 603   return stats.video_bytes_decoded;
 604 }
 605
 606 bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
 607     blink::WebGraphicsContext3D* web_graphics_context,
 608     unsigned int texture,
 609     unsigned int level,
 610     unsigned int internal_format,
 611     unsigned int type,
 612     bool premultiply_alpha,
 613     bool flip_y) {
 614   TRACE_EVENT0("media", "WebMediaPlayerImpl:copyVideoTextureToPlatformTexture");
 615
 616   scoped_refptr<media::VideoFrame> video_frame =
 617       GetCurrentFrameFromCompositor();
 618
 619   if (!video_frame)
 620     return false;
 621   if (video_frame->format() != media::VideoFrame::NATIVE_TEXTURE)
 622     return false;
 623
 624   const gpu::MailboxHolder* mailbox_holder = video_frame->mailbox_holder();
 625   if (mailbox_holder->texture_target != GL_TEXTURE_2D)
 626     return false;
 627
 628   web_graphics_context->waitSyncPoint(mailbox_holder->sync_point);
 629   uint32 source_texture = web_graphics_context->createAndConsumeTextureCHROMIUM(
 630       GL_TEXTURE_2D, mailbox_holder->mailbox.name);
 631
 632   // The video is stored in a unmultiplied format, so premultiply
 633   // if necessary.
 634   web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
 635                                     premultiply_alpha);
 636   // Application itself needs to take care of setting the right flip_y
 637   // value down to get the expected result.
 638   // flip_y==true means to reverse the video orientation while
 639   // flip_y==false means to keep the intrinsic orientation.
 640   web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, flip_y);
 641   web_graphics_context->copyTextureCHROMIUM(GL_TEXTURE_2D,
 642                                             source_texture,
 643                                             texture,
 644                                             level,
 645                                             internal_format,
 646                                             type);
 647   web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, false);
 648   web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
 649                                     false);
 650
 651   web_graphics_context->deleteTexture(source_texture);
 652   web_graphics_context->flush();
 653
 654   SyncPointClientImpl client(web_graphics_context);
 655   video_frame->UpdateReleaseSyncPoint(&client);
 656   return true;
 657 }
 658
 659 // Helper functions to report media EME related stats to UMA. They follow the
 660 // convention of more commonly used macros UMA_HISTOGRAM_ENUMERATION and
 661 // UMA_HISTOGRAM_COUNTS. The reason that we cannot use those macros directly is
 662 // that UMA_* macros require the names to be constant throughout the process'
 663 // lifetime.
 664 static void EmeUMAHistogramEnumeration(const std::string& key_system,
 665                                        const std::string& method,
 666                                        int sample,
 667                                        int boundary_value) {
 668   base::LinearHistogram::FactoryGet(
 669       kMediaEme + KeySystemNameForUMA(key_system) + "." + method,
 670       1, boundary_value, boundary_value + 1,
 671       base::Histogram::kUmaTargetedHistogramFlag)->Add(sample);
 672 }
 673
 674 static void EmeUMAHistogramCounts(const std::string& key_system,
 675                                   const std::string& method,
 676                                   int sample) {
 677   // Use the same parameters as UMA_HISTOGRAM_COUNTS.
 678   base::Histogram::FactoryGet(
 679       kMediaEme + KeySystemNameForUMA(key_system) + "." + method,
 680       1, 1000000, 50, base::Histogram::kUmaTargetedHistogramFlag)->Add(sample);
 681 }
 682
 683 // Helper enum for reporting generateKeyRequest/addKey histograms.
 684 enum MediaKeyException {
 685   kUnknownResultId,
 686   kSuccess,
 687   kKeySystemNotSupported,
 688   kInvalidPlayerState,
 689   kMaxMediaKeyException
 690 };
 691
 692 static MediaKeyException MediaKeyExceptionForUMA(
 693     WebMediaPlayer::MediaKeyException e) {
 694   switch (e) {
 695     case WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported:
 696       return kKeySystemNotSupported;
 697     case WebMediaPlayer::MediaKeyExceptionInvalidPlayerState:
 698       return kInvalidPlayerState;
 699     case WebMediaPlayer::MediaKeyExceptionNoError:
 700       return kSuccess;
 701     default:
 702       return kUnknownResultId;
 703   }
 704 }
 705
 706 // Helper for converting |key_system| name and exception |e| to a pair of enum
 707 // values from above, for reporting to UMA.
 708 static void ReportMediaKeyExceptionToUMA(const std::string& method,
 709                                          const std::string& key_system,
 710                                          WebMediaPlayer::MediaKeyException e) {
 711   MediaKeyException result_id = MediaKeyExceptionForUMA(e);
 712   DCHECK_NE(result_id, kUnknownResultId) << e;
 713   EmeUMAHistogramEnumeration(
 714       key_system, method, result_id, kMaxMediaKeyException);
 715 }
 716
 717 // Convert a WebString to ASCII, falling back on an empty string in the case
 718 // of a non-ASCII string.
 719 static std::string ToASCIIOrEmpty(const blink::WebString& string) {
 720   return base::IsStringASCII(string) ? base::UTF16ToASCII(string)
 721                                      : std::string();
 722 }
 723
 724 WebMediaPlayer::MediaKeyException
 725 WebMediaPlayerImpl::generateKeyRequest(const WebString& key_system,
 726                                        const unsigned char* init_data,
 727                                        unsigned init_data_length) {
 728   DVLOG(1) << "generateKeyRequest: " << base::string16(key_system) << ": "
 729            << std::string(reinterpret_cast<const char*>(init_data),
 730                           static_cast<size_t>(init_data_length));
 731
 732   std::string ascii_key_system =
 733       GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
 734
 735   WebMediaPlayer::MediaKeyException e =
 736       GenerateKeyRequestInternal(ascii_key_system, init_data, init_data_length);
 737   ReportMediaKeyExceptionToUMA("generateKeyRequest", ascii_key_system, e);
 738   return e;
 739 }
 740
 741 // Guess the type of |init_data|. This is only used to handle some corner cases
 742 // so we keep it as simple as possible without breaking major use cases.
 743 static std::string GuessInitDataType(const unsigned char* init_data,
 744                                      unsigned init_data_length) {
 745   // Most WebM files use KeyId of 16 bytes. MP4 init data are always >16 bytes.
 746   if (init_data_length == 16)
 747     return "video/webm";
 748
 749   return "video/mp4";
 750 }
 751
 752 WebMediaPlayer::MediaKeyException
 753 WebMediaPlayerImpl::GenerateKeyRequestInternal(const std::string& key_system,
 754                                                const unsigned char* init_data,
 755                                                unsigned init_data_length) {
 756   DCHECK(main_loop_->BelongsToCurrentThread());
 757
 758   if (!IsConcreteSupportedKeySystem(key_system))
 759     return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
 760
 761   // We do not support run-time switching between key systems for now.
 762   if (current_key_system_.empty()) {
 763     if (!proxy_decryptor_) {
 764       proxy_decryptor_.reset(new ProxyDecryptor(
 765 #if defined(ENABLE_PEPPER_CDMS)
 766           // Create() must be called synchronously as |frame_| may not be
 767           // valid afterwards.
 768           base::Bind(&PepperCdmWrapperImpl::Create, frame_),
 769 #elif defined(ENABLE_BROWSER_CDMS)
 770 #error Browser side CDM in WMPI for prefixed EME API not supported yet.
 771 #endif
 772           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyAdded),
 773           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyError),
 774           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyMessage)));
 775     }
 776
 777     GURL security_origin(frame_->document().securityOrigin().toString());
 778     if (!proxy_decryptor_->InitializeCDM(key_system, security_origin))
 779       return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
 780
 781     if (proxy_decryptor_ && !decryptor_ready_cb_.is_null()) {
 782       base::ResetAndReturn(&decryptor_ready_cb_)
 783           .Run(proxy_decryptor_->GetDecryptor(), base::Bind(DoNothing));
 784     }
 785
 786     current_key_system_ = key_system;
 787   } else if (key_system != current_key_system_) {
 788     return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
 789   }
 790
 791   std::string init_data_type = init_data_type_;
 792   if (init_data_type.empty())
 793     init_data_type = GuessInitDataType(init_data, init_data_length);
 794
 795   // TODO(xhwang): We assume all streams are from the same container (thus have
 796   // the same "type") for now. In the future, the "type" should be passed down
 797   // from the application.
 798   if (!proxy_decryptor_->GenerateKeyRequest(
 799            init_data_type, init_data, init_data_length)) {
 800     current_key_system_.clear();
 801     return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
 802   }
 803
 804   return WebMediaPlayer::MediaKeyExceptionNoError;
 805 }
 806
 807 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::addKey(
 808     const WebString& key_system,
 809     const unsigned char* key,
 810     unsigned key_length,
 811     const unsigned char* init_data,
 812     unsigned init_data_length,
 813     const WebString& session_id) {
 814   DVLOG(1) << "addKey: " << base::string16(key_system) << ": "
 815            << std::string(reinterpret_cast<const char*>(key),
 816                           static_cast<size_t>(key_length)) << ", "
 817            << std::string(reinterpret_cast<const char*>(init_data),
 818                           static_cast<size_t>(init_data_length)) << " ["
 819            << base::string16(session_id) << "]";
 820
 821   std::string ascii_key_system =
 822       GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
 823   std::string ascii_session_id = ToASCIIOrEmpty(session_id);
 824
 825   WebMediaPlayer::MediaKeyException e = AddKeyInternal(ascii_key_system,
 826                                                        key,
 827                                                        key_length,
 828                                                        init_data,
 829                                                        init_data_length,
 830                                                        ascii_session_id);
 831   ReportMediaKeyExceptionToUMA("addKey", ascii_key_system, e);
 832   return e;
 833 }
 834
 835 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::AddKeyInternal(
 836     const std::string& key_system,
 837     const unsigned char* key,
 838     unsigned key_length,
 839     const unsigned char* init_data,
 840     unsigned init_data_length,
 841     const std::string& session_id) {
 842   DCHECK(key);
 843   DCHECK_GT(key_length, 0u);
 844
 845   if (!IsConcreteSupportedKeySystem(key_system))
 846     return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
 847
 848   if (current_key_system_.empty() || key_system != current_key_system_)
 849     return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
 850
 851   proxy_decryptor_->AddKey(
 852       key, key_length, init_data, init_data_length, session_id);
 853   return WebMediaPlayer::MediaKeyExceptionNoError;
 854 }
 855
 856 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::cancelKeyRequest(
 857     const WebString& key_system,
 858     const WebString& session_id) {
 859   DVLOG(1) << "cancelKeyRequest: " << base::string16(key_system) << ": "
 860            << " [" << base::string16(session_id) << "]";
 861
 862   std::string ascii_key_system =
 863       GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
 864   std::string ascii_session_id = ToASCIIOrEmpty(session_id);
 865
 866   WebMediaPlayer::MediaKeyException e =
 867       CancelKeyRequestInternal(ascii_key_system, ascii_session_id);
 868   ReportMediaKeyExceptionToUMA("cancelKeyRequest", ascii_key_system, e);
 869   return e;
 870 }
 871
 872 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::CancelKeyRequestInternal(
 873     const std::string& key_system,
 874     const std::string& session_id) {
 875   if (!IsConcreteSupportedKeySystem(key_system))
 876     return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
 877
 878   if (current_key_system_.empty() || key_system != current_key_system_)
 879     return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
 880
 881   proxy_decryptor_->CancelKeyRequest(session_id);
 882   return WebMediaPlayer::MediaKeyExceptionNoError;
 883 }
 884
 885 void WebMediaPlayerImpl::setContentDecryptionModule(
 886     blink::WebContentDecryptionModule* cdm) {
 887   DCHECK(main_loop_->BelongsToCurrentThread());
 888
 889   // TODO(xhwang): Support setMediaKeys(0) if necessary: http://crbug.com/330324
 890   if (!cdm)
 891     return;
 892
 893   web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
 894
 895   if (web_cdm_ && !decryptor_ready_cb_.is_null())
 896     base::ResetAndReturn(&decryptor_ready_cb_)
 897         .Run(web_cdm_->GetDecryptor(), base::Bind(DoNothing));
 898 }
 899
 900 void WebMediaPlayerImpl::setContentDecryptionModule(
 901     blink::WebContentDecryptionModule* cdm,
 902     blink::WebContentDecryptionModuleResult result) {
 903   DCHECK(main_loop_->BelongsToCurrentThread());
 904
 905   // TODO(xhwang): Support setMediaKeys(0) if necessary: http://crbug.com/330324
 906   if (!cdm) {
 907     result.completeWithError(
 908         blink::WebContentDecryptionModuleExceptionNotSupportedError,
 909         0,
 910         "Null MediaKeys object is not supported.");
 911     return;
 912   }
 913
 914   web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
 915
 916   if (web_cdm_ && !decryptor_ready_cb_.is_null()) {
 917     base::ResetAndReturn(&decryptor_ready_cb_)
 918         .Run(web_cdm_->GetDecryptor(),
 919              BIND_TO_RENDER_LOOP1(
 920                  &WebMediaPlayerImpl::ContentDecryptionModuleAttached, result));
 921   } else {
 922     // No pipeline/decoder connected, so resolve the promise. When something
 923     // is connected, setting the CDM will happen in SetDecryptorReadyCB().
 924     ContentDecryptionModuleAttached(result, true);
 925   }
 926 }
 927
 928 void WebMediaPlayerImpl::setContentDecryptionModuleSync(
 929     blink::WebContentDecryptionModule* cdm) {
 930   DCHECK(main_loop_->BelongsToCurrentThread());
 931
 932   // Used when loading media and no pipeline/decoder attached yet.
 933   DCHECK(decryptor_ready_cb_.is_null());
 934
 935   web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
 936 }
 937
 938 void WebMediaPlayerImpl::ContentDecryptionModuleAttached(
 939     blink::WebContentDecryptionModuleResult result,
 940     bool success) {
 941   if (success) {
 942     result.complete();
 943     return;
 944   }
 945
 946   result.completeWithError(
 947       blink::WebContentDecryptionModuleExceptionNotSupportedError,
 948       0,
 949       "Unable to set MediaKeys object");
 950 }
 951
 952 void WebMediaPlayerImpl::OnPipelineSeeked(bool time_changed,
 953                                           PipelineStatus status) {
 954   DVLOG(1) << __FUNCTION__ << "(" << time_changed << ", " << status << ")";
 955   DCHECK(main_loop_->BelongsToCurrentThread());
 956   seeking_ = false;
 957   if (pending_seek_) {
 958     pending_seek_ = false;
 959     seek(pending_seek_seconds_);
 960     return;
 961   }
 962
 963   if (status != media::PIPELINE_OK) {
 964     OnPipelineError(status);
 965     return;
 966   }
 967
 968   // Update our paused time.
 969   if (paused_)
 970     paused_time_ = pipeline_.GetMediaTime();
 971
 972   should_notify_time_changed_ = time_changed;
 973 }
 974
 975 void WebMediaPlayerImpl::OnPipelineEnded() {
 976   DVLOG(1) << __FUNCTION__;
 977   DCHECK(main_loop_->BelongsToCurrentThread());
 978   client_->timeChanged();
 979 }
 980
 981 void WebMediaPlayerImpl::OnPipelineError(PipelineStatus error) {
 982   DCHECK(main_loop_->BelongsToCurrentThread());
 983   DCHECK_NE(error, media::PIPELINE_OK);
 984
 985   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing) {
 986     // Any error that occurs before reaching ReadyStateHaveMetadata should
 987     // be considered a format error.
 988     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
 989     return;
 990   }
 991
 992   SetNetworkState(PipelineErrorToNetworkState(error));
 993
 994   if (error == media::PIPELINE_ERROR_DECRYPT)
 995     EmeUMAHistogramCounts(current_key_system_, "DecryptError", 1);
 996 }
 997
 998 void WebMediaPlayerImpl::OnPipelineMetadata(
 999     media::PipelineMetadata metadata) {
1000   DVLOG(1) << __FUNCTION__;
1001
1002   pipeline_metadata_ = metadata;
1003
1004   UMA_HISTOGRAM_ENUMERATION("Media.VideoRotation",
1005                             metadata.video_rotation,
1006                             media::VIDEO_ROTATION_MAX + 1);
1007   SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
1008
1009   if (hasVideo()) {
1010     DCHECK(!video_weblayer_);
1011     scoped_refptr<cc::VideoLayer> layer =
1012         cc::VideoLayer::Create(compositor_, pipeline_metadata_.video_rotation);
1013
1014     if (pipeline_metadata_.video_rotation == media::VIDEO_ROTATION_90 ||
1015         pipeline_metadata_.video_rotation == media::VIDEO_ROTATION_270) {
1016       gfx::Size size = pipeline_metadata_.natural_size;
1017       pipeline_metadata_.natural_size = gfx::Size(size.height(), size.width());
1018     }
1019
1020     video_weblayer_.reset(new WebLayerImpl(layer));
1021     video_weblayer_->setOpaque(opaque_);
1022     client_->setWebLayer(video_weblayer_.get());
1023   }
1024 }
1025
1026 void WebMediaPlayerImpl::OnPipelineBufferingStateChanged(
1027     media::BufferingState buffering_state) {
1028   DVLOG(1) << __FUNCTION__ << "(" << buffering_state << ")";
1029
1030   // Ignore buffering state changes until we've completed all outstanding seeks.
1031   if (seeking_ || pending_seek_)
1032     return;
1033
1034   // TODO(scherkus): Handle other buffering states when Pipeline starts using
1035   // them and translate them ready state changes http://crbug.com/144683
1036   DCHECK_EQ(buffering_state, media::BUFFERING_HAVE_ENOUGH);
1037   SetReadyState(WebMediaPlayer::ReadyStateHaveEnoughData);
1038
1039   // Blink expects a timeChanged() in response to a seek().
1040   if (should_notify_time_changed_)
1041     client_->timeChanged();
1042 }
1043
1044 void WebMediaPlayerImpl::OnDemuxerOpened() {
1045   DCHECK(main_loop_->BelongsToCurrentThread());
1046   client_->mediaSourceOpened(new WebMediaSourceImpl(
1047       chunk_demuxer_, base::Bind(&LogMediaSourceError, media_log_)));
1048 }
1049
1050 void WebMediaPlayerImpl::OnKeyAdded(const std::string& session_id) {
1051   DCHECK(main_loop_->BelongsToCurrentThread());
1052   EmeUMAHistogramCounts(current_key_system_, "KeyAdded", 1);
1053   client_->keyAdded(
1054       WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
1055       WebString::fromUTF8(session_id));
1056 }
1057
1058 void WebMediaPlayerImpl::OnNeedKey(const std::string& type,
1059                                    const std::vector<uint8>& init_data) {
1060   DCHECK(main_loop_->BelongsToCurrentThread());
1061
1062   // Do not fire NeedKey event if encrypted media is not enabled.
1063   if (!blink::WebRuntimeFeatures::isPrefixedEncryptedMediaEnabled() &&
1064       !blink::WebRuntimeFeatures::isEncryptedMediaEnabled()) {
1065     return;
1066   }
1067
1068   UMA_HISTOGRAM_COUNTS(kMediaEme + std::string("NeedKey"), 1);
1069
1070   DCHECK(init_data_type_.empty() || type.empty() || type == init_data_type_);
1071   if (init_data_type_.empty())
1072     init_data_type_ = type;
1073
1074   const uint8* init_data_ptr = init_data.empty() ? NULL : &init_data[0];
1075   client_->keyNeeded(
1076       WebString::fromUTF8(type), init_data_ptr, init_data.size());
1077 }
1078
1079 void WebMediaPlayerImpl::OnAddTextTrack(
1080     const media::TextTrackConfig& config,
1081     const media::AddTextTrackDoneCB& done_cb) {
1082   DCHECK(main_loop_->BelongsToCurrentThread());
1083
1084   const WebInbandTextTrackImpl::Kind web_kind =
1085       static_cast<WebInbandTextTrackImpl::Kind>(config.kind());
1086   const blink::WebString web_label =
1087       blink::WebString::fromUTF8(config.label());
1088   const blink::WebString web_language =
1089       blink::WebString::fromUTF8(config.language());
1090   const blink::WebString web_id =
1091       blink::WebString::fromUTF8(config.id());
1092
1093   scoped_ptr<WebInbandTextTrackImpl> web_inband_text_track(
1094       new WebInbandTextTrackImpl(web_kind, web_label, web_language, web_id,
1095                                  text_track_index_++));
1096
1097   scoped_ptr<media::TextTrack> text_track(
1098       new TextTrackImpl(main_loop_, client_, web_inband_text_track.Pass()));
1099
1100   done_cb.Run(text_track.Pass());
1101 }
1102
1103 void WebMediaPlayerImpl::OnKeyError(const std::string& session_id,
1104                                     media::MediaKeys::KeyError error_code,
1105                                     uint32 system_code) {
1106   DCHECK(main_loop_->BelongsToCurrentThread());
1107
1108   EmeUMAHistogramEnumeration(current_key_system_, "KeyError",
1109                              error_code, media::MediaKeys::kMaxKeyError);
1110
1111   unsigned short short_system_code = 0;
1112   if (system_code > std::numeric_limits<unsigned short>::max()) {
1113     LOG(WARNING) << "system_code exceeds unsigned short limit.";
1114     short_system_code = std::numeric_limits<unsigned short>::max();
1115   } else {
1116     short_system_code = static_cast<unsigned short>(system_code);
1117   }
1118
1119   client_->keyError(
1120       WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
1121       WebString::fromUTF8(session_id),
1122       static_cast<blink::WebMediaPlayerClient::MediaKeyErrorCode>(error_code),
1123       short_system_code);
1124 }
1125
1126 void WebMediaPlayerImpl::OnKeyMessage(const std::string& session_id,
1127                                       const std::vector<uint8>& message,
1128                                       const GURL& destination_url) {
1129   DCHECK(main_loop_->BelongsToCurrentThread());
1130
1131   DCHECK(destination_url.is_empty() || destination_url.is_valid());
1132
1133   client_->keyMessage(
1134       WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
1135       WebString::fromUTF8(session_id),
1136       message.empty() ? NULL : &message[0],
1137       message.size(),
1138       destination_url);
1139 }
1140
1141 void WebMediaPlayerImpl::DataSourceInitialized(bool success) {
1142   DCHECK(main_loop_->BelongsToCurrentThread());
1143
1144   if (!success) {
1145     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
1146     return;
1147   }
1148
1149   StartPipeline();
1150 }
1151
1152 void WebMediaPlayerImpl::NotifyDownloading(bool is_downloading) {
1153   if (!is_downloading && network_state_ == WebMediaPlayer::NetworkStateLoading)
1154     SetNetworkState(WebMediaPlayer::NetworkStateIdle);
1155   else if (is_downloading && network_state_ == WebMediaPlayer::NetworkStateIdle)
1156     SetNetworkState(WebMediaPlayer::NetworkStateLoading);
1157   media_log_->AddEvent(
1158       media_log_->CreateBooleanEvent(
1159           media::MediaLogEvent::NETWORK_ACTIVITY_SET,
1160           "is_downloading_data", is_downloading));
1161 }
1162
1163 void WebMediaPlayerImpl::StartPipeline() {
1164   DCHECK(main_loop_->BelongsToCurrentThread());
1165   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
1166
1167   // Keep track if this is a MSE or non-MSE playback.
1168   UMA_HISTOGRAM_BOOLEAN("Media.MSE.Playback",
1169                         (load_type_ == LoadTypeMediaSource));
1170
1171   media::LogCB mse_log_cb;
1172
1173   // Figure out which demuxer to use.
1174   if (load_type_ != LoadTypeMediaSource) {
1175     DCHECK(!chunk_demuxer_);
1176     DCHECK(data_source_);
1177
1178     demuxer_.reset(new media::FFmpegDemuxer(
1179         media_loop_, data_source_.get(),
1180         BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNeedKey),
1181         media_log_));
1182   } else {
1183     DCHECK(!chunk_demuxer_);
1184     DCHECK(!data_source_);
1185
1186     mse_log_cb = base::Bind(&LogMediaSourceError, media_log_);
1187
1188     chunk_demuxer_ = new media::ChunkDemuxer(
1189         BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDemuxerOpened),
1190         BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNeedKey),
1191         mse_log_cb,
1192         true);
1193     demuxer_.reset(chunk_demuxer_);
1194   }
1195
1196   scoped_ptr<media::FilterCollection> filter_collection(
1197       new media::FilterCollection());
1198   filter_collection->SetDemuxer(demuxer_.get());
1199
1200   media::SetDecryptorReadyCB set_decryptor_ready_cb =
1201       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::SetDecryptorReadyCB);
1202
1203   // Create our audio decoders and renderer.
1204   ScopedVector<media::AudioDecoder> audio_decoders;
1205   audio_decoders.push_back(new media::FFmpegAudioDecoder(media_loop_,
1206                                                          mse_log_cb));
1207   audio_decoders.push_back(new media::OpusAudioDecoder(media_loop_));
1208
1209   scoped_ptr<media::AudioRenderer> audio_renderer(new media::AudioRendererImpl(
1210       media_loop_,
1211       audio_source_provider_.get(),
1212       audio_decoders.Pass(),
1213       set_decryptor_ready_cb,
1214       RenderThreadImpl::current()->GetAudioHardwareConfig()));
1215   filter_collection->SetAudioRenderer(audio_renderer.Pass());
1216
1217   // Create our video decoders and renderer.
1218   ScopedVector<media::VideoDecoder> video_decoders;
1219
1220   if (gpu_factories_.get()) {
1221     video_decoders.push_back(
1222         new media::GpuVideoDecoder(gpu_factories_, media_log_));
1223   }
1224
1225 #if !defined(MEDIA_DISABLE_LIBVPX)
1226   video_decoders.push_back(new media::VpxVideoDecoder(media_loop_));
1227 #endif  // !defined(MEDIA_DISABLE_LIBVPX)
1228
1229   video_decoders.push_back(new media::FFmpegVideoDecoder(media_loop_));
1230
1231   scoped_ptr<media::VideoRenderer> video_renderer(
1232       new media::VideoRendererImpl(
1233           media_loop_,
1234           video_decoders.Pass(),
1235           set_decryptor_ready_cb,
1236           base::Bind(&WebMediaPlayerImpl::FrameReady, base::Unretained(this)),
1237           true));
1238   filter_collection->SetVideoRenderer(video_renderer.Pass());
1239
1240   if (cmd_line->HasSwitch(switches::kEnableInbandTextTracks)) {
1241     scoped_ptr<media::TextRenderer> text_renderer(
1242         new media::TextRenderer(
1243             media_loop_,
1244             BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnAddTextTrack)));
1245
1246     filter_collection->SetTextRenderer(text_renderer.Pass());
1247   }
1248
1249   // ... and we're ready to go!
1250   seeking_ = true;
1251   pipeline_.Start(
1252       filter_collection.Pass(),
1253       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineEnded),
1254       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineError),
1255       BIND_TO_RENDER_LOOP1(&WebMediaPlayerImpl::OnPipelineSeeked, false),
1256       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineMetadata),
1257       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineBufferingStateChanged),
1258       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDurationChanged));
1259 }
1260
1261 void WebMediaPlayerImpl::SetNetworkState(WebMediaPlayer::NetworkState state) {
1262   DVLOG(1) << __FUNCTION__ << "(" << state << ")";
1263   DCHECK(main_loop_->BelongsToCurrentThread());
1264   network_state_ = state;
1265   // Always notify to ensure client has the latest value.
1266   client_->networkStateChanged();
1267 }
1268
1269 void WebMediaPlayerImpl::SetReadyState(WebMediaPlayer::ReadyState state) {
1270   DVLOG(1) << __FUNCTION__ << "(" << state << ")";
1271   DCHECK(main_loop_->BelongsToCurrentThread());
1272
1273   if (state == WebMediaPlayer::ReadyStateHaveEnoughData && data_source_ &&
1274       data_source_->assume_fully_buffered() &&
1275       network_state_ == WebMediaPlayer::NetworkStateLoading)
1276     SetNetworkState(WebMediaPlayer::NetworkStateLoaded);
1277
1278   ready_state_ = state;
1279   // Always notify to ensure client has the latest value.
1280   client_->readyStateChanged();
1281 }
1282
1283 blink::WebAudioSourceProvider* WebMediaPlayerImpl::audioSourceProvider() {
1284   return audio_source_provider_.get();
1285 }
1286
1287 void WebMediaPlayerImpl::IncrementExternallyAllocatedMemory() {
1288   DCHECK(main_loop_->BelongsToCurrentThread());
1289   incremented_externally_allocated_memory_ = true;
1290   v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(
1291       kPlayerExtraMemory);
1292 }
1293
1294 double WebMediaPlayerImpl::GetPipelineDuration() const {
1295   base::TimeDelta duration = pipeline_.GetMediaDuration();
1296
1297   // Return positive infinity if the resource is unbounded.
1298   // http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#dom-media-duration
1299   if (duration == media::kInfiniteDuration())
1300     return std::numeric_limits<double>::infinity();
1301
1302   return duration.InSecondsF();
1303 }
1304
1305 void WebMediaPlayerImpl::OnDurationChanged() {
1306   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
1307     return;
1308
1309   client_->durationChanged();
1310 }
1311
1312 void WebMediaPlayerImpl::OnNaturalSizeChanged(gfx::Size size) {
1313   DCHECK(main_loop_->BelongsToCurrentThread());
1314   DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
1315   TRACE_EVENT0("media", "WebMediaPlayerImpl::OnNaturalSizeChanged");
1316
1317   media_log_->AddEvent(
1318       media_log_->CreateVideoSizeSetEvent(size.width(), size.height()));
1319   pipeline_metadata_.natural_size = size;
1320
1321   client_->sizeChanged();
1322 }
1323
1324 void WebMediaPlayerImpl::OnOpacityChanged(bool opaque) {
1325   DCHECK(main_loop_->BelongsToCurrentThread());
1326   DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
1327
1328   opaque_ = opaque;
1329   if (video_weblayer_)
1330     video_weblayer_->setOpaque(opaque_);
1331 }
1332
1333 void WebMediaPlayerImpl::FrameReady(
1334     const scoped_refptr<media::VideoFrame>& frame) {
1335   compositor_task_runner_->PostTask(
1336       FROM_HERE,
1337       base::Bind(&VideoFrameCompositor::UpdateCurrentFrame,
1338                  base::Unretained(compositor_),
1339                  frame));
1340 }
1341
1342 void WebMediaPlayerImpl::SetDecryptorReadyCB(
1343      const media::DecryptorReadyCB& decryptor_ready_cb) {
1344   DCHECK(main_loop_->BelongsToCurrentThread());
1345
1346   // Cancels the previous decryptor request.
1347   if (decryptor_ready_cb.is_null()) {
1348     if (!decryptor_ready_cb_.is_null()) {
1349       base::ResetAndReturn(&decryptor_ready_cb_)
1350           .Run(NULL, base::Bind(DoNothing));
1351     }
1352     return;
1353   }
1354
1355   // TODO(xhwang): Support multiple decryptor notification request (e.g. from
1356   // video and audio). The current implementation is okay for the current
1357   // media pipeline since we initialize audio and video decoders in sequence.
1358   // But WebMediaPlayerImpl should not depend on media pipeline's implementation
1359   // detail.
1360   DCHECK(decryptor_ready_cb_.is_null());
1361
1362   // Mixed use of prefixed and unprefixed EME APIs is disallowed by Blink.
1363   DCHECK(!proxy_decryptor_ || !web_cdm_);
1364
1365   if (proxy_decryptor_) {
1366     decryptor_ready_cb.Run(proxy_decryptor_->GetDecryptor(),
1367                            base::Bind(DoNothing));
1368     return;
1369   }
1370
1371   if (web_cdm_) {
1372     decryptor_ready_cb.Run(web_cdm_->GetDecryptor(), base::Bind(DoNothing));
1373     return;
1374   }
1375
1376   decryptor_ready_cb_ = decryptor_ready_cb;
1377 }
1378
1379 static void GetCurrentFrameAndSignal(
1380     VideoFrameCompositor* compositor,
1381     scoped_refptr<media::VideoFrame>* video_frame_out,
1382     base::WaitableEvent* event) {
1383   TRACE_EVENT0("media", "GetCurrentFrameAndSignal");
1384   *video_frame_out = compositor->GetCurrentFrame();
1385   event->Signal();
1386 }
1387
1388 scoped_refptr<media::VideoFrame>
1389 WebMediaPlayerImpl::GetCurrentFrameFromCompositor() {
1390   TRACE_EVENT0("media", "WebMediaPlayerImpl::GetCurrentFrameFromCompositor");
1391   if (compositor_task_runner_->BelongsToCurrentThread())
1392     return compositor_->GetCurrentFrame();
1393
1394   // Use a posted task and waitable event instead of a lock otherwise
1395   // WebGL/Canvas can see different content than what the compositor is seeing.
1396   scoped_refptr<media::VideoFrame> video_frame;
1397   base::WaitableEvent event(false, false);
1398   compositor_task_runner_->PostTask(FROM_HERE,
1399                                     base::Bind(&GetCurrentFrameAndSignal,
1400                                                base::Unretained(compositor_),
1401                                                &video_frame,
1402                                                &event));
1403   event.Wait();
1404   return video_frame;
1405 }
1406
1407 }  // namespace content