Support CAST+WMPI on android

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 46 matching lines @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 using blink::WebCanvas;
 using blink::WebMediaPlayer;
 using blink::WebRect;
 using blink::WebSize;
 using blink::WebString;
+using gpu::gles2::GLES2Interface;
+
+namespace media {
 
 namespace {
 
 // Limits the range of playback rate.
 //
 // TODO(kylep): Revisit these.
 //
 // Vista has substantially lower performance than XP or Windows7.  If you speed
 // up a video too much, it can't keep up, and rendering stops updating except on
 // the time bar. For really high speeds, audio becomes a bottleneck and we just
 // use up the data we have, which may not achieve the speed requested, but will
 // not crash the tab.
 //
 // A very slow speed, ie 0.00000001x, causes the machine to lock up. (It seems
 // like a busy loop). It gets unresponsive, although its not completely dead.
 //
 // Also our timers are not very accurate (especially for ogg), which becomes
 // evident at low speeds and on Vista. Since other speeds are risky and outside
 // the norms, we think 1/16x to 16x is a safe and useful range for now.
 const double kMinRate = 0.0625;
 const double kMaxRate = 16.0;
 
-void SetSinkIdOnMediaThread(
-    scoped_refptr<media::WebAudioSourceProviderImpl> sink,
-    const std::string& device_id,
-    const url::Origin& security_origin,
-    const media::SwitchOutputDeviceCB& callback) {
+void SetSinkIdOnMediaThread(scoped_refptr<WebAudioSourceProviderImpl> sink,
+                            const std::string& device_id,
+                            const url::Origin& security_origin,
+                            const SwitchOutputDeviceCB& callback) {
   if (sink->GetOutputDevice()) {
     sink->GetOutputDevice()->SwitchOutputDevice(device_id, security_origin,
                                                 callback);
   } else {
-    callback.Run(media::OUTPUT_DEVICE_STATUS_ERROR_INTERNAL);
+    callback.Run(OUTPUT_DEVICE_STATUS_ERROR_INTERNAL);
   }
 }
 
 }  // namespace
 
-namespace media {
-
 class BufferedDataSourceHostImpl;
 
 #define STATIC_ASSERT_MATCHING_ENUM(name, name2)                    \
   static_assert(static_cast<int>(WebMediaPlayer::CORSMode##name) == \
                     static_cast<int>(UrlData::name2),               \
                 "mismatching enum values: " #name)
 STATIC_ASSERT_MATCHING_ENUM(Unspecified, CORS_UNSPECIFIED);
 STATIC_ASSERT_MATCHING_ENUM(Anonymous, CORS_ANONYMOUS);
 STATIC_ASSERT_MATCHING_ENUM(UseCredentials, CORS_USE_CREDENTIALS);
 #undef STATIC_ASSERT_MATCHING_ENUM
@@ skipping 59 matching lines @@
           compositor_task_runner_,
           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNaturalSizeChanged),
           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnOpacityChanged))),
       encrypted_media_support_(cdm_factory,
                                encrypted_client,
                                params.media_permission(),
                                base::Bind(&WebMediaPlayerImpl::SetCdm,
                                           AsWeakPtr(),
                                           base::Bind(&IgnoreCdmAttached))),
       is_cdm_attached_(false),
+#if defined(OS_ANDROID)  // WMPI_CAST
+      cast_impl_(this, client_, params.context_3d_cb()),
+#endif
       renderer_factory_(std::move(renderer_factory)) {
   DCHECK(!adjust_allocated_memory_cb_.is_null());
 
   if (delegate)
     delegate->AddObserver(this);
 
   media_log_->AddEvent(
       media_log_->CreateEvent(MediaLogEvent::WEBMEDIAPLAYER_CREATED));
 
   if (params.initial_cdm()) {
@@ skipping 99 matching lines @@
     data_source_.reset(new BufferedDataSource(
         url, static_cast<BufferedResourceLoader::CORSMode>(cors_mode),
         main_task_runner_, frame_, media_log_.get(),
         &buffered_data_source_host_,
         base::Bind(&WebMediaPlayerImpl::NotifyDownloading, AsWeakPtr())));
   }
   data_source_->SetPreload(preload_);
   data_source_->SetBufferingStrategy(buffering_strategy_);
   data_source_->Initialize(
       base::Bind(&WebMediaPlayerImpl::DataSourceInitialized, AsWeakPtr()));
+
+#if defined(OS_ANDROID)  // WMPI_CAST
+  cast_impl_.Initialize(url, frame_);
+#endif
 }
 
 void WebMediaPlayerImpl::play() {
   DVLOG(1) << __FUNCTION__;
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
+#if defined(OS_ANDROID)  // WMPI_CAST
+  if (cast_impl_.isRemote()) {
+    cast_impl_.play();
+    return;
+  }
+#endif
+
   paused_ = false;
+
   pipeline_.SetPlaybackRate(playback_rate_);
   if (data_source_)
     data_source_->MediaIsPlaying();
 
   media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::PLAY));
 
   if (delegate_ && playback_rate_ > 0)
     NotifyPlaybackStarted();
 }
 
 void WebMediaPlayerImpl::pause() {
   DVLOG(1) << __FUNCTION__;
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   const bool was_already_paused = paused_ || playback_rate_ == 0;
   paused_ = true;
+
+#if defined(OS_ANDROID)  // WMPI_CAST
+  if (cast_impl_.isRemote()) {
+    cast_impl_.pause();
+    return;
+  }
+#endif
+
   pipeline_.SetPlaybackRate(0.0);
   UpdatePausedTime();
 
   media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::PAUSE));
 
   if (!was_already_paused && delegate_)
     NotifyPlaybackPaused();
 }
 
 bool WebMediaPlayerImpl::supportsSave() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   return supports_save_;
 }
 
 void WebMediaPlayerImpl::seek(double seconds) {
   DVLOG(1) << __FUNCTION__ << "(" << seconds << "s)";
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   ended_ = false;
 
+  base::TimeDelta new_seek_time = base::TimeDelta::FromSecondsD(seconds);
+
+#if defined(OS_ANDROID)  // WMPI_CAST
+  if (cast_impl_.isRemote()) {
+    cast_impl_.seek(new_seek_time);
+    return;
+  }
+#endif
+
   ReadyState old_state = ready_state_;
   if (ready_state_ > WebMediaPlayer::ReadyStateHaveMetadata)
     SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
 
-  base::TimeDelta new_seek_time = base::TimeDelta::FromSecondsD(seconds);
-
   if (seeking_ || suspended_) {
     // Once resuming, it's too late to change the resume time and so the
     // implementation is a little different.
     bool is_suspended = suspended_ && !resuming_;
 
     // If we are currently seeking or resuming to |new_seek_time|, skip the
     // seek (except for MSE, which always seeks).
     if (!is_suspended && new_seek_time == seek_time_) {
       if (chunk_demuxer_) {
         // Don't suppress any redundant in-progress MSE seek. There could have
@@ skipping 53 matching lines @@
       return;
     }
   }
 
   seeking_ = true;
   seek_time_ = new_seek_time;
 
   if (chunk_demuxer_)
     chunk_demuxer_->StartWaitingForSeek(seek_time_);
 
-  // Kick off the asynchronous seek!
   pipeline_.Seek(seek_time_, BIND_TO_RENDER_LOOP1(
                                  &WebMediaPlayerImpl::OnPipelineSeeked, true));
 }
 
 void WebMediaPlayerImpl::setRate(double rate) {
   DVLOG(1) << __FUNCTION__ << "(" << rate << ")";
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   // TODO(kylep): Remove when support for negatives is added. Also, modify the
   // following checks so rewind uses reasonable values also.
@@ skipping 96 matching lines @@
 
 blink::WebSize WebMediaPlayerImpl::naturalSize() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   return blink::WebSize(pipeline_metadata_.natural_size);
 }
 
 bool WebMediaPlayerImpl::paused() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
+#if defined(OS_ANDROID)  // WMPI_CAST
+  if (cast_impl_.isRemote())
+    return cast_impl_.paused();
+#endif
   return pipeline_.GetPlaybackRate() == 0.0f;
 }
 
 bool WebMediaPlayerImpl::seeking() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
     return false;
 
   return seeking_;
@@ skipping 27 matching lines @@
     return duration();
 
   // We know the current seek time better than pipeline: pipeline may processing
   // an earlier seek before a pending seek has been started, or it might not yet
   // have the current seek time returnable via GetMediaTime().
   if (seeking()) {
     return pending_seek_ ? pending_seek_time_.InSecondsF()
                          : seek_time_.InSecondsF();
   }
 
-  return (paused_ ? paused_time_ : pipeline_.GetMediaTime()).InSecondsF();
+#if defined(OS_ANDROID)  // WMPI_CAST
+  if (cast_impl_.isRemote()) {
+    return cast_impl_.currentTime();
+  }
+#endif
+
+  if (paused_) {
+    return paused_time_.InSecondsF();
+  }
+
+  return pipeline_.GetMediaTime().InSecondsF();
 }
 
 WebMediaPlayer::NetworkState WebMediaPlayerImpl::networkState() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   return network_state_;
 }
 
 WebMediaPlayer::ReadyState WebMediaPlayerImpl::readyState() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   return ready_state_;
@@ skipping 306 matching lines @@
   DVLOG(1) << __FUNCTION__ << "(" << status << ")";
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   if (status != PIPELINE_OK) {
     OnPipelineError(status);
     return;
   }
 
   suspending_ = false;
 
+#if defined(OS_ANDROID)
+  if (cast_impl_.isRemote()) {
+    scoped_refptr<VideoFrame> frame = cast_impl_.GetCastingBanner();
+    if (frame) {
+      compositor_->PaintFrameUsingOldRenderingPath(frame);
+    }
+  }
+#endif
+
   if (pending_resume_) {
     pending_resume_ = false;
     Resume();
     return;
   }
 }
 
 void WebMediaPlayerImpl::OnPipelineEnded() {
   DVLOG(1) << __FUNCTION__;
   DCHECK(main_task_runner_->BelongsToCurrentThread());
@@ skipping 120 matching lines @@
           switches::kEnableMediaSuspend)) {
     return;
   }
 #endif  // !defined(OS_ANDROID)
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableMediaSuspend)) {
     return;
   }
 
+#if defined(OS_ANDROID)
+  // If we're remote, the pipeline should already be suspended.
+  if (cast_impl_.isRemote())
+    return;
+#endif
+
+  ScheduleSuspend();
+}
+
+void WebMediaPlayerImpl::ScheduleSuspend() {
   if (!pipeline_.IsRunning() || !hasVideo())
     return;
 
   if (resuming_ || seeking_) {
     pending_suspend_ = true;
     return;
   }
 
   if (pending_resume_) {
     pending_resume_ = false;
@@ skipping 21 matching lines @@
           switches::kEnableMediaSuspend)) {
     return;
   }
 #endif  // !defined(OS_ANDROID)
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableMediaSuspend)) {
     return;
   }
 
+#if defined(OS_ANDROID)
+  // If we're remote, the pipeline should stay suspended.
+  if (cast_impl_.isRemote())
+    return;
+#endif
+
+  ScheduleResume();
+}
+
+void WebMediaPlayerImpl::ScheduleResume() {
   if (!pipeline_.IsRunning())
     return;
 
   if (suspending_) {
     pending_resume_ = true;
     return;
   }
 
   if (pending_suspend_) {
     pending_suspend_ = false;
     return;
   }
 
-  // We may not be suspended if we were not yet subscribed or the pipeline was
-  // not yet started when OnHidden() fired.
-  if (!suspended_)
-    return;
-
-  Resume();
+  // Might already be resuming iff we came back from remote playback recently.
+  if (suspended_ && !resuming_)
+    Resume();
 }
 
 void WebMediaPlayerImpl::Resume() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   CHECK(suspended_);
   CHECK(!resuming_);
 
   // If there was a time change pending when we suspended (which can happen when
   // we suspend immediately after a seek), surface it after resuming.
   bool time_changed = pending_time_change_;
@@ skipping 15 matching lines @@
 
   if (chunk_demuxer_)
     chunk_demuxer_->StartWaitingForSeek(seek_time_);
 
   resuming_ = true;
   pipeline_.Resume(CreateRenderer(), seek_time_,
                    BIND_TO_RENDER_LOOP1(&WebMediaPlayerImpl::OnPipelineSeeked,
                                         time_changed));
 }
 
+#if defined(OS_ANDROID)  // WMPI_CAST
+void WebMediaPlayerImpl::set_media_player_manager(
+    RendererMediaPlayerManagerInterface* media_player_manager) {
+  cast_impl_.set_media_player_manager(media_player_manager);
+}
+
+void WebMediaPlayerImpl::requestRemotePlayback() {
+  cast_impl_.requestRemotePlayback();
+}
+
+void WebMediaPlayerImpl::requestRemotePlaybackControl() {
+  cast_impl_.requestRemotePlaybackControl();
+}
+
+void WebMediaPlayerImpl::OnRemotePlaybackEnded() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+
+  ended_ = true;
+  client_->timeChanged();
+}
+
+void WebMediaPlayerImpl::OnDisconnectedFromRemoteDevice(double t) {
+  paused_time_ = base::TimeDelta::FromSecondsD(t);
+
+  DCHECK(!pending_seek_);

[sandersd (OOO until July 31), 2016/01/13 23:05:43]

Looks like you're correct that the currentTime() respects a pending seek.
However, there is no step that actually clears the pending seek and so this
DCHECK will trigger in that case.

I suppose just remove this DCHECK for now, having a pending seek the whole time
isn't really a problem.

[hubbe, 2016/01/14 00:25:53]

Done.

+  pending_seek_ = true;
+  pending_seek_time_ = paused_time_;
+
+  ScheduleResume();
+
+  if (paused_time_ == pipeline_.GetMediaDuration()) {
+    ended_ = true;
+  }
+  // We already told the delegate we're paused when remoting started.
+  client_->playbackStateChanged();
+  client_->disconnectedFromRemoteDevice();
+}
+
+void WebMediaPlayerImpl::SuspendForRemote() {
+  if (suspended_ && !suspending_) {
+    scoped_refptr<VideoFrame> frame = cast_impl_.GetCastingBanner();
+    if (frame) {
+      compositor_->PaintFrameUsingOldRenderingPath(frame);
+    }
+  }
+  ScheduleSuspend();
+}
+
+gfx::Size WebMediaPlayerImpl::GetCanvasSize() const {
+  if (!video_weblayer_)
+    return gfx::Size(0, 0);
+
+  gfx::Size video_size_css_px = video_weblayer_->bounds();
+  float device_scale_factor = frame_->view()->deviceScaleFactor();
+  // canvas_size will be the size in device pixels when pageScaleFactor == 1
+  gfx::Size canvas_size(
+      static_cast<int>(video_size_css_px.width() * device_scale_factor),
+      static_cast<int>(video_size_css_px.height() * device_scale_factor));
+  return canvas_size;
+}
+#endif  // defined(OS_ANDROID)  // WMPI_CAST
+
 void WebMediaPlayerImpl::DataSourceInitialized(bool success) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   if (!success) {
     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
     return;
   }
 
   StartPipeline();
@@ skipping 161 matching lines @@
 
   // pause() may be called after playback has ended and the HTMLMediaElement
   // requires that currentTime() == duration() after ending.  We want to ensure
   // |paused_time_| matches currentTime() in this case or a future seek() may
   // incorrectly discard what it thinks is a seek to the existing time.
   paused_time_ =
       ended_ ? pipeline_.GetMediaDuration() : pipeline_.GetMediaTime();
 }
 
 void WebMediaPlayerImpl::NotifyPlaybackStarted() {
+#if defined(OS_ANDROID)  // WMPI_CAST
+  // We do not tell our delegates about remote playback, becuase that would
+  // keep the device awake, which is not what we want.
+  if (cast_impl_.isRemote())
+    return;
+#endif
   if (delegate_)
     delegate_->DidPlay(this);
   if (!memory_usage_reporting_timer_.IsRunning()) {
     memory_usage_reporting_timer_.Start(FROM_HERE,
                                         base::TimeDelta::FromSeconds(2), this,
                                         &WebMediaPlayerImpl::ReportMemoryUsage);
   }
 }
 
 void WebMediaPlayerImpl::NotifyPlaybackPaused() {
+#if defined(OS_ANDROID)  // WMPI_CAST
+  if (cast_impl_.isRemote())
+    return;
+#endif
   if (delegate_)
     delegate_->DidPause(this);
   memory_usage_reporting_timer_.Stop();
   ReportMemoryUsage();
 }
 
 void WebMediaPlayerImpl::ReportMemoryUsage() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   // About base::Unretained() usage below: We destroy |demuxer_| on the main
@@ skipping 24 matching lines @@
            << ", Video: " << stats.video_memory_usage << ", DataSource: "
            << (data_source_ ? data_source_->GetMemoryUsage() : 0)
            << ", Demuxer: " << demuxer_memory_usage;
 
   const int64_t delta = current_memory_usage - last_reported_memory_usage_;
   last_reported_memory_usage_ = current_memory_usage;
   adjust_allocated_memory_cb_.Run(delta);
 }
 
 }  // namespace media