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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_PROTOCOL_VIDEO_RENDERER_H_
#define REMOTING_PROTOCOL_VIDEO_RENDERER_H_
namespace remoting {
class ClientContext;
namespace protocol {
class FrameConsumer;
class FrameStatsConsumer;
class SessionConfig;
class VideoStub;
// VideoRenderer is responsible for decoding and displaying incoming video
// stream. This interface is used by ConnectionToHost implementations to
// render received video frames. ConnectionToHost may feed encoded frames to the
// VideoStub or decode them and pass decoded frames to the FrameConsumer. If the
// implementation uses FrameConsumer directly then it must also call
// FrameStatsConsumer with FrameStats for each frame.
//
// TODO(sergeyu): Reconsider this design.
class VideoRenderer {
public:
virtual ~VideoRenderer() = default;
// Initializes the video renderer. This allows the renderer to be initialized
// after it is constructed. Returns true if initialization succeeds and false
// otherwise. An implementation that doesn't use this function to initialize
// should always return true.
// |perf_tracker| must outlive the renderer.
virtual bool Initialize(const ClientContext& client_context,
protocol::FrameStatsConsumer* stats_consumer) = 0;
// Configures the renderer with the supplied |config|. This must be called
// exactly once before video data is supplied to the renderer.
virtual void OnSessionConfig(const SessionConfig& config) = 0;
// Returns the VideoStub interface of this renderer.
virtual VideoStub* GetVideoStub() = 0;
// Returns the FrameConsumer interface for this renderer.
virtual FrameConsumer* GetFrameConsumer() = 0;
// Returns the FrameStatsConsumer interface for this renderer.
virtual FrameStatsConsumer* GetFrameStatsConsumer() = 0;
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_VIDEO_RENDERER_H_
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