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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_ENCODER_H_
#define REMOTING_HOST_ENCODER_H_
#include "base/basictypes.h"
#include "base/callback.h"
#include "media/base/data_buffer.h"
#include "remoting/base/protocol/chromotocol.pb.h"
#include "remoting/host/capturer.h"
namespace media {
class DataBuffer;
}
namespace remoting {
// A class to perform the task of encoding a continous stream of
// images.
// This class operates asynchronously to enable maximum throughput.
class Encoder {
public:
// EncodingState is a bitfield that tracks the state of the encoding.
// An encoding that consists of a single block could concievably be starting
// inprogress and ended at the same time.
enum {
EncodingStarting = 1 << 0,
EncodingInProgress = 1 << 1,
EncodingEnded = 1 << 2
};
typedef int EncodingState;
// DataAvailableCallback is called as blocks of data are made available
// from the encoder. The callback takes ownership of header and is
// responsible for deleting it.
typedef Callback3<const UpdateStreamPacketHeader*,
const scoped_refptr<media::DataBuffer>&,
EncodingState>::Type DataAvailableCallback;
virtual ~Encoder() {}
// Encode an image stored in |capture_data|.
//
// If |key_frame| is true, the encoder should not reference
// previous encode and encode the full frame.
//
// When encoded data is available, partial or full |data_available_callback|
// is called.
virtual void Encode(scoped_refptr<Capturer::CaptureData> capture_data,
bool key_frame,
DataAvailableCallback* data_available_callback) = 0;
};
} // namespace remoting
#endif // REMOTING_HOST_ENCODER_H_
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