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/*
* Copyright (c) 2011 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 WEBRTC_MODULES_UTILITY_SOURCE_VIDEO_FRAMES_QUEUE_H_
#define WEBRTC_MODULES_UTILITY_SOURCE_VIDEO_FRAMES_QUEUE_H_
#ifdef WEBRTC_MODULE_UTILITY_VIDEO
#include <list>
#include "webrtc/common_video/interface/i420_video_frame.h"
#include "webrtc/engine_configurations.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class VideoFramesQueue {
public:
VideoFramesQueue();
~VideoFramesQueue();
// Put newFrame (last) in the queue.
int32_t AddFrame(const I420VideoFrame& newFrame);
// Return the most current frame. I.e. the frame with the highest
// VideoFrame::RenderTimeMs() that is lower than
// TickTime::MillisecondTimestamp().
I420VideoFrame* FrameToRecord();
// Set the render delay estimate to renderDelay ms.
int32_t SetRenderDelay(uint32_t renderDelay);
protected:
// Make ptrOldFrame available for re-use. I.e. put it in the empty frames
// queue.
int32_t ReturnFrame(I420VideoFrame* ptrOldFrame);
private:
typedef std::list<I420VideoFrame*> FrameList;
// Don't allow the buffer to expand beyond KMaxNumberOfFrames VideoFrames.
// 300 frames correspond to 10 seconds worth of frames at 30 fps.
enum {KMaxNumberOfFrames = 300};
// List of VideoFrame pointers. The list is sorted in the order of when the
// VideoFrame was inserted into the list. The first VideoFrame in the list
// was inserted first.
FrameList _incomingFrames;
// A list of frames that are free to be re-used.
FrameList _emptyFrames;
// Estimated render delay.
uint32_t _renderDelayMs;
};
} // namespace webrtc
#endif // WEBRTC_MODULE_UTILITY_VIDEO
#endif // WEBRTC_MODULES_UTILITY_SOURCE_VIDEO_FRAMES_QUEUE_H_
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