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__;

[watk, 2016/08/09 21:39:58]

I was going to say we use __func__ now, but a bunch of media files still use the
old one.. not sure if there's a reason for that or no one's gotten around to it.

[tguilbert, 2016/08/09 22:38:34]

Oh, I didn't know about __func__. Done!

+  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);

[watk, 2016/08/09 21:39:58]

We would usually put this in an early return above "if (GetType() != URL)"

[tguilbert, 2016/08/09 22:38:34]

Done.

+  }
+}
+
+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;

[watk, 2016/08/09 21:39:58]

nullptr

[tguilbert, 2016/08/09 22:38:34]

Done.

+    // 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()));

[watk, 2016/08/09 21:39:58]

Isn't render_frame_host_ the right one?

[tguilbert, 2016/08/09 22:38:34]

I am TBH not sure what this code does. It copied it from WMPA and took look 2
classes deep, but didn'tany farther than that. How can this be cleaned up?

[watk, 2016/08/09 23:04:15]

Oh, I just meant pass render_frame_host_->GetRoutingID() instead of the main
frame id (which addresses the todo comment above it).

The MediaResourceGetter lets MPB get cookies to pass to MediaPlayer, and
metadata (size, duration) to return to WMPI before starting playback (when
preload=auto or preload=metadata).

[tguilbert, 2016/08/10 20:34:26]

Done.

+  }
+  return media_resource_getter_.get();
+}
+
+media::MediaUrlInterceptor* MediaPlayerRenderer::GetMediaUrlInterceptor() {
+  return nullptr;
+}
+
+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) {

[watk, 2016/08/09 21:39:58]

Should we also check !has_error_ to avoid sending more than one error?

[tguilbert, 2016/08/09 22:38:34]

I'm not sure. Won't the pipeline simply initiate the Stop() and ignore any
subsequent errors during "teardown"?

[watk, 2016/08/09 23:04:15]

True, should be fine.

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