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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_CAST_STREAMING_RENDERER_CONTROL_PLAYBACK_COMMAND_FORWARDING_RENDERER_H_
#define COMPONENTS_CAST_STREAMING_RENDERER_CONTROL_PLAYBACK_COMMAND_FORWARDING_RENDERER_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "media/base/renderer.h"
#include "media/base/renderer_client.h"
#include "media/mojo/mojom/renderer.mojom.h"
#include "mojo/public/cpp/bindings/associated_remote.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"
namespace cast_streaming {
// For high-level details, see documentation in
// PlaybackCommandForwardingRendererFactory.h.
class PlaybackCommandForwardingRenderer : public media::Renderer,
public media::RendererClient {
public:
// |renderer| is the Renderer to which the Initialize() call should be
// delegated.
// |task_runner| is the task runner on which mojo calls should be run.
// |pending_receiver_controls| is the remote Receiver which will be providing
// playback commands to this instance.
PlaybackCommandForwardingRenderer(
std::unique_ptr<media::Renderer> renderer,
scoped_refptr<base::SequencedTaskRunner> task_runner,
mojo::PendingReceiver<media::mojom::Renderer> pending_rederer_controls);
PlaybackCommandForwardingRenderer(const PlaybackCommandForwardingRenderer&) =
delete;
PlaybackCommandForwardingRenderer(PlaybackCommandForwardingRenderer&&) =
delete;
~PlaybackCommandForwardingRenderer() override;
PlaybackCommandForwardingRenderer& operator=(
const PlaybackCommandForwardingRenderer&) = delete;
PlaybackCommandForwardingRenderer& operator=(
PlaybackCommandForwardingRenderer&&) = delete;
// Renderer overrides.
//
// Calls into |real_renderer_|'s method of the same name.
void Initialize(media::MediaResource* media_resource,
media::RendererClient* client,
media::PipelineStatusCallback init_cb) override;
// Further Renderer overrides as no-ops. In the remoting scenario, these
// commands will be received from the end-user's device over mojo.
void SetCdm(media::CdmContext* cdm_context,
CdmAttachedCB cdm_attached_cb) override;
void SetLatencyHint(std::optional<base::TimeDelta> latency_hint) override;
void Flush(base::OnceClosure flush_cb) override;
void StartPlayingFrom(base::TimeDelta time) override;
void SetPlaybackRate(double playback_rate) override;
void SetVolume(float volume) override;
base::TimeDelta GetMediaTime() override;
media::RendererType GetRendererType() override;
private:
// Private namespace function not defined here because its details are not
// important.
friend class RendererCommandForwarder;
// media::mojom::Renderer implementation, with methods renamed to avoid
// intersection with media::Renderer types.
//
// Calls are all forwarded to |real_renderer_|;
void MojoRendererInitialize(
::mojo::PendingAssociatedRemote<media::mojom::RendererClient> client,
std::optional<
std::vector<::mojo::PendingRemote<::media::mojom::DemuxerStream>>>
streams,
media::mojom::Renderer::InitializeCallback callback);
void MojoRendererStartPlayingFrom(::base::TimeDelta time);
void MojoRendererSetPlaybackRate(double playback_rate);
void MojoRendererFlush(media::mojom::Renderer::FlushCallback callback);
void MojoRendererSetVolume(float volume);
void MojoRendererSetCdm(const std::optional<::base::UnguessableToken>& cdm_id,
media::mojom::Renderer::SetCdmCallback callback);
// media::RendererClient overrides.
//
// Each of these simply forwards the call to both |remote_renderer_client_|
// and |upstream_renderer_client_|.
void OnError(media::PipelineStatus status) override;
void OnFallback(media::PipelineStatus status) override;
void OnEnded() override;
void OnStatisticsUpdate(const media::PipelineStatistics& stats) override;
void OnBufferingStateChange(
media::BufferingState state,
media::BufferingStateChangeReason reason) override;
void OnWaiting(media::WaitingReason reason) override;
void OnAudioConfigChange(const media::AudioDecoderConfig& config) override;
void OnVideoConfigChange(const media::VideoDecoderConfig& config) override;
void OnVideoNaturalSizeChange(const gfx::Size& size) override;
void OnVideoOpacityChange(bool opaque) override;
void OnVideoFrameRateChange(std::optional<int> fps) override;
void OnRealRendererInitializationComplete(media::PipelineStatus status);
// Sends an OnTimeUpdate() call to |remote_renderer_client_|.
void SendTimestampUpdate();
// Helper to create |send_timestamp_update_caller_| on |task_runner_|.
void InitializeSendTimestampUpdateCaller();
void OnMojoDisconnect();
// Renderer to which playback calls should be forwarded.
std::unique_ptr<media::Renderer> real_renderer_;
// Callback provided to this class as part of the Initialize() call. Called in
// OnRealRendererInitializationComplete().
media::PipelineStatusCallback init_cb_;
// Provided in the ctor and passed to |playback_controller_| upon its creation
// in OnRealRendererInitializationComplete().
mojo::PendingReceiver<media::mojom::Renderer> pending_renderer_controls_;
// Task runner on which all mojo callbacks will be run.
scoped_refptr<base::SequencedTaskRunner> task_runner_;
// Created as part of OnRealRendererInitializationComplete().
std::unique_ptr<media::mojom::Renderer> playback_controller_;
// Channel to provide data back to the remote caller, set during
// MojoRendererInitialize().
mojo::AssociatedRemote<media::mojom::RendererClient> remote_renderer_client_;
raw_ptr<RendererClient> upstream_renderer_client_;
base::RepeatingTimer send_timestamp_update_caller_;
base::WeakPtrFactory<PlaybackCommandForwardingRenderer> weak_factory_;
};
} // namespace cast_streaming
#endif // COMPONENTS_CAST_STREAMING_RENDERER_CONTROL_PLAYBACK_COMMAND_FORWARDING_RENDERER_H_
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