1/*
2 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "webrtc/modules/desktop_capture/screen_capture_frame_queue.h"
12
13#include <assert.h>
14#include <algorithm>
15
16#include "webrtc/modules/desktop_capture/desktop_frame.h"
17#include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
18#include "webrtc/system_wrappers/interface/logging.h"
19#include "webrtc/typedefs.h"
20
21namespace webrtc {
22
23ScreenCaptureFrameQueue::ScreenCaptureFrameQueue() : current_(0) {}
24
25ScreenCaptureFrameQueue::~ScreenCaptureFrameQueue() {}
26
27void ScreenCaptureFrameQueue::MoveToNextFrame() {
28  current_ = (current_ + 1) % kQueueLength;
29
30  // Verify that the frame is not shared, i.e. that consumer has released it
31  // before attempting to capture again.
32  assert(!frames_[current_].get() || !frames_[current_]->IsShared());
33}
34
35void ScreenCaptureFrameQueue::ReplaceCurrentFrame(DesktopFrame* frame) {
36  frames_[current_].reset(SharedDesktopFrame::Wrap(frame));
37}
38
39void ScreenCaptureFrameQueue::Reset() {
40  for (int i = 0; i < kQueueLength; ++i)
41    frames_[i].reset();
42}
43
44}  // namespace webrtc
45