Add MediaPlayerRenderer/MediaPlayerRendererClient

content/browser/media/android/media_player_renderer.cc

+// Copyright 2016 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 "content/browser/media/android/media_player_renderer.h"
+
+#include <memory>
+
+#include "content/browser/media/android/media_resource_getter_impl.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/storage_partition.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/content_client.h"
+
+// TODO(tguilbert): Remove this ID once MediaPlayerManager has been deleted
+// and MediaPlayerBridge updated. See comment in header file.
+const int kUnusedAndIrrelevantPlayerId = 0;
+
+namespace content {
+
+MediaPlayerRenderer::MediaPlayerRenderer(RenderFrameHost* render_frame_host)
+    : render_frame_host_(render_frame_host),
+      duration_(base::TimeDelta::FromMicroseconds(0)),
+      has_error_(false),
+      width_(0),
+      height_(0),
+      weak_factory_(this) {}
+
+MediaPlayerRenderer::~MediaPlayerRenderer() {}
+
+void MediaPlayerRenderer::Initialize(
+    media::DemuxerStreamProvider* demuxer_stream_provider,
+    media::RendererClient* client,
+    const media::PipelineStatusCB& init_cb) {
+  DVLOG(1) << __FUNCTION__;
+  if (demuxer_stream_provider->GetType() ==
+      media::DemuxerStreamProvider::Type::URL) {
+    GURL url = demuxer_stream_provider->GetUrl();
+    renderer_client_ = client;
+
+    const std::string user_agent = GetContentClient()->GetUserAgent();
+
+    // TODO(tguilbert): FOR REVIEWERS: I am not sure what each parameter below
+    // is used for. Are there any ones that I should be concerned with ATM? I
+    // have added the parameter name for convenience next to the ones I don't
+    // know what to do with.
+    media_player_.reset(new media::MediaPlayerBridge(
+        kUnusedAndIrrelevantPlayerId, url,
+        GURL(),  // first_party_for_cookies
+        user_agent,
+        false,  // hide_url_log
+        this, base::Bind(&MediaPlayerRenderer::OnDecoderResourcesReleased,
+                         weak_factory_.GetWeakPtr()),
+        GURL(),  // frame_url
+        false,   // allow_crendentials
+        0));     // media_session_id
+
+    // TODO(tguilbert): Register and Send the proper surface ID. See
+    // crbug.com/627658
+
+    media_player_->Initialize();
+    init_cb.Run(media::PIPELINE_OK);
+  } else {
+    LOG(ERROR) << "DemuxerStreamProvider is not of Type URL";
+    init_cb.Run(media::PIPELINE_ERROR_INITIALIZATION_FAILED);
+  }
+}
+
+void MediaPlayerRenderer::SetCdm(media::CdmContext* cdm_context,
+                                 const media::CdmAttachedCB& cdm_attached_cb) {
+  NOTREACHED();
+}
+
+void MediaPlayerRenderer::Flush(const base::Closure& flush_cb) {
+  DVLOG(3) << __FUNCTION__;
+  flush_cb.Run();
+}
+
+void MediaPlayerRenderer::StartPlayingFrom(base::TimeDelta time) {
+  // MediaPlayerBridge's Start() is idempotent, except when it has encountered
+  // an error (in which case, calling Start() again is logged as a new error).
+  if (has_error_)
+    return;
+
+  media_player_->Start();
+  media_player_->SeekTo(time);
+}
+
+void MediaPlayerRenderer::SetPlaybackRate(double playback_rate) {
+  if (has_error_)
+    return;
+
+  if (playback_rate == 0) {
+    media_player_->Pause(true);
+  } else {
+    // MediaPlayerBridge's Start() is idempotent.
+    media_player_->Start();
+  }
+}
+
+void MediaPlayerRenderer::SetVolume(float volume) {
+  media_player_->SetVolume(volume);
+}
+
+base::TimeDelta MediaPlayerRenderer::GetMediaTime() {
+  return media_player_->GetCurrentTime();
+}
+
+bool MediaPlayerRenderer::HasAudio() {
+  return media_player_->HasAudio();
+}
+
+bool MediaPlayerRenderer::HasVideo() {
+  return media_player_->HasVideo();
+}
+
+media::MediaResourceGetter* MediaPlayerRenderer::GetMediaResourceGetter() {
+  if (!media_resource_getter_.get()) {
+    WebContents* web_contents =
+        WebContents::FromRenderFrameHost(render_frame_host_);
+    RenderProcessHost* host = web_contents->GetRenderProcessHost();
+    BrowserContext* context = host->GetBrowserContext();
+    StoragePartition* partition = host->GetStoragePartition();
+    storage::FileSystemContext* file_system_context =
+        partition ? partition->GetFileSystemContext() : NULL;
+    // Eventually this needs to be fixed to pass the correct frame rather
+    // than just using the main frame.
+    media_resource_getter_.reset(new MediaResourceGetterImpl(
+        context, file_system_context, host->GetID(),
+        web_contents->GetMainFrame()->GetRoutingID()));
+  }
+  return media_resource_getter_.get();
+}
+
+media::MediaUrlInterceptor* MediaPlayerRenderer::GetMediaUrlInterceptor() {
+  return nullptr;

[tguilbert, 2016/08/09 19:30:08]

Should I be concerned with this?

+}
+
+void MediaPlayerRenderer::OnTimeUpdate(int player_id,
+                                       base::TimeDelta current_timestamp,
+                                       base::TimeTicks current_time_ticks) {}
+
+void MediaPlayerRenderer::OnMediaMetadataChanged(int player_id,
+                                                 base::TimeDelta duration,
+                                                 int width,
+                                                 int height,
+                                                 bool success) {
+  if (width_ != width || height_ != height)
+    OnVideoSizeChanged(kUnusedAndIrrelevantPlayerId, width, height);
+
+  if (duration_ != duration) {
+    duration_ = duration;
+    // TODO(tguilbert): Add OnDurationChange to the RendererClient interface.
+    // See crbug.com/635991.
+  }
+}
+
+void MediaPlayerRenderer::OnPlaybackComplete(int player_id) {
+  renderer_client_->OnEnded();
+}
+
+void MediaPlayerRenderer::OnMediaInterrupted(int player_id) {}
+
+void MediaPlayerRenderer::OnBufferingUpdate(int player_id, int percentage) {
+  // As per Android documentation, |percentage| actually indicates "percentage
+  // buffered or played". E.g. if we are at 50% playback and have 1%
+  // buffered, |percentage| will be equal to 51.
+  //
+  // MediaPlayer manages its own buffering and will pause internally if ever it
+  // runs out of data. Therefore, we can always return BUFFERING_HAVE_ENOUGH.
+  renderer_client_->OnBufferingStateChange(media::BUFFERING_HAVE_ENOUGH);
+}
+
+void MediaPlayerRenderer::OnSeekComplete(int player_id,
+                                         const base::TimeDelta& current_time) {}
+
+void MediaPlayerRenderer::OnError(int player_id, int error) {
+  DVLOG(2) << __FUNCTION__ << " Error: " << error;
+  // TODO(tguilbert): Use more detailed errors if needed.
+
+  // Some errors are forwarded to the MediaPlayerListener, but are of no
+  // importance to us. Ignore these errors, which are reported as error 0 by
+  // MediaPlayerListener.
+  if (error) {
+    has_error_ = true;
+    renderer_client_->OnError(media::PIPELINE_ERROR_COULD_NOT_RENDER);
+  }
+}
+
+void MediaPlayerRenderer::OnVideoSizeChanged(int player_id,
+                                             int width,
+                                             int height) {
+  width_ = width;
+  height_ = height;
+  renderer_client_->OnVideoNaturalSizeChange(gfx::Size(width, height));
+}
+
+void MediaPlayerRenderer::OnWaitingForDecryptionKey(int player_id) {
+  NOTREACHED();
+}
+
+media::MediaPlayerAndroid* MediaPlayerRenderer::GetFullscreenPlayer() {
+  NOTREACHED();
+  return nullptr;
+}
+
+media::MediaPlayerAndroid* MediaPlayerRenderer::GetPlayer(int player_id) {
+  NOTREACHED();
+  return nullptr;
+}
+
+bool MediaPlayerRenderer::RequestPlay(int player_id,
+                                      base::TimeDelta duration,
+                                      bool has_audio) {
+  return true;
+}
+
+void MediaPlayerRenderer::OnDecoderResourcesReleased(int player_id) {
+  // Since we are not using a pool of MediaPlayerAndroid instances, this
+  // function is not relevant.
+
+  // TODO(tguilbert): Investigate whether the use of the MediaThrottler is

[tguilbert, 2016/08/09 19:30:08]

What is the MediaThrottler used for?

+  // needed.
+}
+
+}  // namespace content