// Copyright 2014 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_RENDER_MEDIA_CLIENT_H_
#define CONTENT_RENDERER_MEDIA_RENDER_MEDIA_CLIENT_H_

#include <vector>

#include "base/sequence_checker.h"
#include "base/synchronization/waitable_event.h"
#include "media/base/audio_parameters.h"
#include "media/base/decoder.h"
#include "media/base/key_systems_support_registration.h"
#include "media/base/media_client.h"
#include "media/base/supported_audio_decoder_config.h"
#include "media/base/supported_video_decoder_config.h"
#include "media/mojo/mojom/audio_decoder.mojom.h"
#include "media/mojo/mojom/interface_factory.mojom.h"
#include "media/mojo/mojom/video_decoder.mojom.h"
#include "media/mojo/mojom/video_encode_accelerator.mojom.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/shared_remote.h"
#include "services/viz/public/mojom/gpu.mojom.h"

namespace content {

// RenderMediaClient is purely plumbing to make content embedder customizations
// visible to the lower media layer.
class RenderMediaClient : public media::MediaClient {
 public:
  RenderMediaClient(const RenderMediaClient&) = delete;
  RenderMediaClient& operator=(const RenderMediaClient&) = delete;

  // Initialize RenderMediaClient and SetMediaClient(). Note that the instance
  // is not exposed because no content code needs to directly access it.
  static void Initialize();

  // Called by RenderThreadImpl when gpu feature info may have changed.
  static void SetGpuFeatureInfo(const gpu::GpuFeatureInfo& gpu_feature_info);

  // MediaClient implementation.
  bool IsDecoderSupportedAudioType(const media::AudioType& type) final;
  bool IsDecoderSupportedVideoType(const media::VideoType& type) final;
  bool IsEncoderSupportedVideoType(const media::VideoType& type) final;
  bool IsSupportedBitstreamAudioCodec(media::AudioCodec codec) final;
  bool ShouldSuppressAudioTracks() final;
  std::optional<::media::AudioRendererAlgorithmParameters>
  GetAudioRendererAlgorithmParameters(
      media::AudioParameters audio_parameters) final;
  media::ExternalMemoryAllocator* GetMediaAllocator() final;

 private:
  friend class base::NoDestructor<RenderMediaClient>;
  RenderMediaClient();
  ~RenderMediaClient() override;

  void GetSupportedVideoEncoderConfigs();

  void OnInterfaceFactoryDisconnected();
  void OnGpuDisconnected();
  void OnAudioDecoderDisconnected();
  void OnVideoDecoderDisconnected();
  void OnVideoEncoderDisconnected();

  void OnGetSupportedAudioDecoderConfigs(
      const media::SupportedAudioDecoderConfigs& configs);
  void OnGetSupportedVideoDecoderConfigs(
      const media::SupportedVideoDecoderConfigs& configs,
      media::VideoDecoderType type);
  void OnGetSupportedVideoEncoderConfigs(
      const media::VideoEncodeAccelerator::SupportedProfiles& configs);

  // Checks if features have changed and clears supported profiles if needed.
  void SetGpuFeatureInfoInternal(const gpu::GpuFeatureInfo& gpu_feature_info);

  const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
  SEQUENCE_CHECKER(main_thread_sequence_checker_);

  // Used to indicate if optional video profile support information has been
  // retrieved from the |video_decoder_for_supported_profiles_|. May be waited
  // upon by any thread but the RenderThread since it's always signaled from the
  // RenderThread.
  [[maybe_unused]] base::WaitableEvent did_video_decoder_update_;

  // Used to indicate if optional audio codec support information has been
  // retrieved from the MojoAudioDecoder. May be waited upon by any thread but
  // the RenderThread since it's always signaled from the RenderThread.
  [[maybe_unused]] base::WaitableEvent did_audio_decoder_update_;

  // Used to indicate if optional video profile support information has been
  // retrieved from the |video_encoder_for_supported_profiles_|.
  [[maybe_unused]] bool did_video_encoder_update_ = false;

  [[maybe_unused]] mojo::Remote<media::mojom::InterfaceFactory>
      interface_factory_for_supported_profiles_
          GUARDED_BY_CONTEXT(main_thread_sequence_checker_);

  [[maybe_unused]] mojo::Remote<viz::mojom::Gpu> gpu_for_supported_profiles_
      GUARDED_BY_CONTEXT(main_thread_sequence_checker_);

  [[maybe_unused]] mojo::SharedRemote<media::mojom::VideoDecoder>
      video_decoder_for_supported_profiles_
          GUARDED_BY_CONTEXT(main_thread_sequence_checker_);

  [[maybe_unused]] mojo::SharedRemote<media::mojom::AudioDecoder>
      audio_decoder_for_supported_configs_
          GUARDED_BY_CONTEXT(main_thread_sequence_checker_);

  [[maybe_unused]] mojo::SharedRemote<
      media::mojom::VideoEncodeAcceleratorProvider>
      video_encoder_for_supported_profiles_
          GUARDED_BY_CONTEXT(main_thread_sequence_checker_);
};

}  // namespace content

#endif  // CONTENT_RENDERER_MEDIA_RENDER_MEDIA_CLIENT_H_