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// Copyright (c) 2011 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_CLIENT_FRAME_CONSUMER_H_
#define REMOTING_CLIENT_FRAME_CONSUMER_H_
#include "remoting/base/decoder.h" // For UpdatedRects
class Task;
namespace remoting {
class FrameConsumer {
public:
FrameConsumer() {}
virtual ~FrameConsumer() {}
// Request a frame be allocated from the FrameConsumer.
//
// If a frame cannot be allocated to fit the format, and |size|
// requirements, |frame_out| will be set to NULL.
//
// An allocated frame will have at least the |size| requested, but
// may be bigger. Query the retrun frame for the actual frame size,
// stride, etc.
//
// The AllocateFrame call is asynchronous. From invocation, until when the
// |done| callback is invoked, |frame_out| should be considered to be locked
// by the FrameConsumer, must remain a valid pointer, and should not be
// examined or modified. After |done| is called, the |frame_out| will
// contain a result of the allocation. If a frame could not be allocated,
// |frame_out| will be NULL.
//
// All frames retrieved via the AllocateFrame call must be released by a
// corresponding call ReleaseFrame(scoped_refptr<VideoFrame>* frame_out.
virtual void AllocateFrame(media::VideoFrame::Format format,
const SkISize& size,
scoped_refptr<media::VideoFrame>* frame_out,
const base::Closure& done) = 0;
virtual void ReleaseFrame(media::VideoFrame* frame) = 0;
// OnPartialFrameOutput() is called every time at least one rectangle of
// output is produced. The |frame| is guaranteed to have valid data for every
// region included in the |rects| list.
//
// Both |frame| and |rects| are guaranteed to be valid until the |done|
// callback is invoked.
virtual void OnPartialFrameOutput(media::VideoFrame* frame,
RectVector* rects,
const base::Closure& done) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(FrameConsumer);
};
} // namespace remoting
#endif // REMOTING_CLIENT_FRAME_CONSUMER_H_
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