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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_BROWSER_CONTROL_REMOTING_RENDERER_RPC_CALL_TRANSLATOR_H_
#define COMPONENTS_CAST_STREAMING_BROWSER_CONTROL_REMOTING_RENDERER_RPC_CALL_TRANSLATOR_H_
#include <memory>
#include <vector>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "media/base/renderer.h"
#include "media/cast/openscreen/rpc_call_message_handler.h"
#include "media/mojo/mojom/renderer.mojom.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace openscreen::cast {
class RpcMessage;
} // namespace openscreen::cast
namespace cast_streaming::remoting {
// This class is responsible for translating between
// openscreen::cast::RpcMessage instances (used by the remoting protocol) and
// mojo API calls (used locally within this chromium instance).
class RendererRpcCallTranslator
: public media::mojom::RendererClient,
public media::cast::RpcRendererCallMessageHandler {
public:
using RpcMessageProcessor = base::RepeatingCallback<void(
openscreen::cast::RpcMessenger::Handle handle,
std::unique_ptr<openscreen::cast::RpcMessage>)>;
using FlushUntilCallback = base::RepeatingCallback<void(uint32_t, uint32_t)>;
// |renderer| is the remote media::mojom::Renderer to which commands
// translated from proto messages should be sent.
// |processor| is responsible for handling any proto messages ready to be sent
// out.
explicit RendererRpcCallTranslator(RpcMessageProcessor processor,
media::mojom::Renderer* renderer,
FlushUntilCallback flush_until_cb);
~RendererRpcCallTranslator() override;
void SendFallbackMessage();
// Sets the |handle| to be used for future outgoing RPC calls.
void set_remote_handle(openscreen::cast::RpcMessenger::Handle handle) {
remote_handle_ = handle;
}
openscreen::cast::RpcMessenger::Handle remote_handle() const {
return remote_handle_;
}
// Sets the |handle| associated with this instance.
void set_local_handle(openscreen::cast::RpcMessenger::Handle handle) {
local_handle_ = handle;
}
openscreen::cast::RpcMessenger::Handle local_handle() const {
return local_handle_;
}
private:
// media::mojom::RendererClient overrides.
void OnTimeUpdate(base::TimeDelta media_time,
base::TimeDelta max_time,
base::TimeTicks capture_time) override;
void OnBufferingStateChange(
media::BufferingState state,
media::BufferingStateChangeReason reason) override;
void OnEnded() override;
void OnError(const media::PipelineStatus& status) 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 OnStatisticsUpdate(const media::PipelineStatistics& stats) override;
void OnWaiting(media::WaitingReason reason) override;
// RpcCallMessageHandler overrides.
void OnRpcInitialize() override;
void OnRpcFlush(uint32_t audio_count, uint32_t video_count) override;
void OnRpcStartPlayingFrom(base::TimeDelta time) override;
void OnRpcSetPlaybackRate(double playback_rate) override;
void OnRpcSetVolume(double volume) override;
// Callback for the Initialize() mojo call. |handle_at_time_of_sending| is
// included as an input so that if |handle_| changes before the response to
// this message is returned, it will send with the old |handle_| value.
void OnInitializeCompleted(
openscreen::cast::RpcMessenger::Handle handle_at_time_of_sending,
bool succeeded);
// Callback to Flush() mojo call. Sends an ack message for the completion of
// the flush command for each handle in |flush_handles_|.
void OnFlushCompleted();
// Signifies whether the Initialize() command has been sent to the Renderer,
// which will only be done once over the duration of this instance's lifetime.
bool has_been_initialized_ = false;
// Called as part of responding to an OnRpcFlush() call, to inform the owning
// class that in-flight frames should be flushed.
FlushUntilCallback flush_until_cb_;
std::vector<openscreen::cast::RpcMessenger::Handle> flush_handles_;
RpcMessageProcessor message_processor_;
mojo::AssociatedReceiver<media::mojom::RendererClient>
renderer_client_receiver_;
raw_ptr<media::mojom::Renderer> renderer_;
openscreen::cast::RpcMessenger::Handle remote_handle_ =
openscreen::cast::RpcMessenger::kInvalidHandle;
openscreen::cast::RpcMessenger::Handle local_handle_ =
openscreen::cast::RpcMessenger::kInvalidHandle;
base::WeakPtrFactory<RendererRpcCallTranslator> weak_factory_;
};
} // namespace cast_streaming::remoting
#endif // COMPONENTS_CAST_STREAMING_BROWSER_CONTROL_REMOTING_RENDERER_RPC_CALL_TRANSLATOR_H_
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