content/renderer/media/android/flinging_renderer_client.h

// Copyright 2019 The Chromium Authors
// 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_FLINGING_RENDERER_CLIENT_H_
#define CONTENT_RENDERER_MEDIA_ANDROID_FLINGING_RENDERER_CLIENT_H_

#include <memory>

#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "content/common/content_export.h"
#include "media/base/media_resource.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 "media/mojo/clients/mojo_renderer_wrapper.h"
#include "media/mojo/mojom/renderer_extensions.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"

namespace content {

// FlingingRendererClient lives in Renderer process and mirrors a
// FlingingRenderer living in the Browser process.
class CONTENT_EXPORT FlingingRendererClient
    : public media::mojom::FlingingRendererClientExtension,
      public media::MojoRendererWrapper {
 public:
  using ClientExtentionPendingReceiver =
      mojo::PendingReceiver<media::mojom::FlingingRendererClientExtension>;

  FlingingRendererClient(
      ClientExtentionPendingReceiver client_extension_receiver,
      scoped_refptr<base::SequencedTaskRunner> media_task_runner,
      std::unique_ptr<media::MojoRenderer> mojo_renderer,
      media::RemotePlayStateChangeCB remote_play_state_change_cb);

  FlingingRendererClient(const FlingingRendererClient&) = delete;
  FlingingRendererClient& operator=(const FlingingRendererClient&) = delete;

  ~FlingingRendererClient() override;

  // media::MojoRendererWrapper overrides.
  void Initialize(media::MediaResource* media_resource,
                  media::RendererClient* client,
                  media::PipelineStatusCallback init_cb) override;
  media::RendererType GetRendererType() override;

  // media::mojom::FlingingRendererClientExtension implementation
  void OnRemotePlayStateChange(media::MediaStatus::State state) override;

 private:
  scoped_refptr<base::SequencedTaskRunner> media_task_runner_;

  raw_ptr<media::RendererClient> client_;

  media::RemotePlayStateChangeCB remote_play_state_change_cb_;

  // Used temporarily, to delay binding to |client_extension_receiver_| until we
  // are on the right sequence, when Initialize() is called.
  ClientExtentionPendingReceiver delayed_bind_client_extension_receiver_;

  mojo::Receiver<FlingingRendererClientExtension> client_extension_receiver_{
      this};
};

}  // namespace content

#endif  // CONTENT_RENDERER_MEDIA_ANDROID_FLINGING_RENDERER_CLIENT_H_