Add MediaPlayerRenderer/MediaPlayerRendererClient

content/renderer/media/android/media_player_renderer_client.h

+// 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.
+
+#ifndef CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_PLAYER_RENDERER_CLIENT_H_
+#define CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_PLAYER_RENDERER_CLIENT_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "media/base/android/stream_texture_wrapper.h"
+#include "media/base/demuxer_stream_provider.h"
+#include "media/base/renderer.h"
+#include "media/base/renderer_client.h"
+#include "media/base/video_renderer_sink.h"
+#include "media/mojo/clients/mojo_renderer.h"
+#include "url/gurl.h"
+
+namespace content {
+
+// MediaPlayerRendererClient lives in Renderer process and mirrors a
+// MediaPlayerRenderer living in the Browser process.
+//
+// It is responsible for forwarding media::Renderer calls from WMPI to the
+// MediaPlayerRenderer, using |mojo_renderer|. It also manages a StreamTexture,
+// (via |stream_texture_wrapper_|) and notifies the VideoRendererSink when new
+// frames are available.
+//
+// N.B: This class implements media::RendererClient, in order to intercept
+// OnVideoNaturalSizeChange() events, to update StreamTextureWrapper. All events
+// (including OnVideoNaturalSizeChange()) are bubbled up to |client_|.
+class CONTENT_EXPORT MediaPlayerRendererClient : public media::Renderer,
+                                                 public media::RendererClient {
+ public:
+  MediaPlayerRendererClient(
+      scoped_refptr<base::SingleThreadTaskRunner> media_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner,
+      media::MojoRenderer* mojo_renderer,
+      media::ScopedStreamTextureWrapper stream_texture_wrapper,
+      media::VideoRendererSink* sink);
+
+  virtual ~MediaPlayerRendererClient();
+
+  // media::Renderer implementation.
+  void Initialize(media::DemuxerStreamProvider* demuxer_stream_provider,
+                  media::RendererClient* client,
+                  const media::PipelineStatusCB& init_cb) override;
+  void SetCdm(media::CdmContext* cdm_context,
+              const media::CdmAttachedCB& cdm_attached_cb) override;
+  void Flush(const base::Closure& flush_cb) override;
+  void StartPlayingFrom(base::TimeDelta time) override;
+  void SetPlaybackRate(double playback_rate) override;
+  void SetVolume(float volume) override;
+  base::TimeDelta GetMediaTime() override;
+  bool HasAudio() override;
+  bool HasVideo() override;
+
+  // RendererClient implementation implementation.
+  void OnError(media::PipelineStatus status) override;
+  void OnEnded() override;
+  void OnStatisticsUpdate(const media::PipelineStatistics& stats) override;
+  void OnBufferingStateChange(media::BufferingState state) override;
+  void OnWaitingForDecryptionKey() override;
+  void OnVideoNaturalSizeChange(const gfx::Size& size) override;
+  void OnVideoOpacityChange(bool opaque) override;
+
+  // Called on |compositor_task_runner_| whenever |stream_texture_wrapper_| has
+  // a new frame.
+  void OnFrameAvailable();
+
+ private:
+  void InitializeRemoteRenderer(
+      media::DemuxerStreamProvider* demuxer_stream_provider);
+  void CompleteInitialization(media::PipelineStatus status);
+
+  // Used to forward calls to the MediaPlayerRenderer living in the Browser.
+  std::unique_ptr<media::MojoRenderer> mojo_renderer_;
+
+  media::ScopedStreamTextureWrapper stream_texture_wrapper_;
+
+  media::RendererClient* client_;
+
+  media::VideoRendererSink* sink_;
+
+  scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
+
+  media::PipelineStatusCB init_cb_;
+
+  // NOTE: Weak pointers must be invalidated before all other member variables.
+  base::WeakPtrFactory<MediaPlayerRendererClient> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaPlayerRendererClient);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_PLAYER_RENDERER_CLIENT_H_