screen_capture_frame_queue.h | Explore in Territory

/*
 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURE_FRAME_QUEUE_H_
#define MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURE_FRAME_QUEUE_H_

#include <memory>

namespace webrtc {

// Represents a queue of reusable video frames. Provides access to the 'current'
// frame - the frame that the caller is working with at the moment, and to the
// 'previous' frame - the predecessor of the current frame swapped by
// MoveToNextFrame() call, if any.
//
// The caller is expected to (re)allocate frames if current_frame() returns
// NULL. The caller can mark all frames in the queue for reallocation (when,
// say, frame dimensions change). The queue records which frames need updating
// which the caller can query.
//
// Frame consumer is expected to never hold more than kQueueLength frames
// created by this function and it should release the earliest one before trying
// to capture a new frame (i.e. before MoveToNextFrame() is called).
template <typename FrameType>
class ScreenCaptureFrameQueue { … };

}  // namespace webrtc

#endif  // MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURE_FRAME_QUEUE_H_
chromium/third_party/webrtc/modules/desktop_capture/screen_capture_frame_queue.h
