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/*
* Copyright (c) 2015 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_COMMON_VIDEO_INTERFACE_I420_BUFFER_POOL_H_
#define WEBRTC_COMMON_VIDEO_INTERFACE_I420_BUFFER_POOL_H_
#include <list>
#include "webrtc/base/thread_checker.h"
#include "webrtc/common_video/interface/video_frame_buffer.h"
namespace webrtc {
// Simple buffer pool to avoid unnecessary allocations of I420Buffer objects.
// The pool manages the memory of the I420Buffer returned from CreateBuffer.
// When the I420Buffer is destructed, the memory is returned to the pool for use
// by subsequent calls to CreateBuffer. If the resolution passed to CreateBuffer
// changes, old buffers will be purged from the pool.
class I420BufferPool {
public:
I420BufferPool();
// Returns a buffer from the pool, or creates a new buffer if no suitable
// buffer exists in the pool.
rtc::scoped_refptr<VideoFrameBuffer> CreateBuffer(int width, int height);
// Clears buffers_ and detaches the thread checker so that it can be reused
// later from another thread.
void Release();
private:
rtc::ThreadChecker thread_checker_;
std::list<rtc::scoped_refptr<I420Buffer>> buffers_;
};
} // namespace webrtc
#endif // WEBRTC_COMMON_VIDEO_INTERFACE_I420_BUFFER_POOL_H_
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