chromium/media/gpu/chromeos/platform_video_frame_pool.h

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_GPU_CHROMEOS_PLATFORM_VIDEO_FRAME_POOL_H_
#define MEDIA_GPU_CHROMEOS_PLATFORM_VIDEO_FRAME_POOL_H_

#include <stddef.h>

#include <map>
#include <optional>
#include <vector>

#include "base/containers/circular_deque.h"
#include "base/files/scoped_file.h"
#include "base/functional/bind.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/lock.h"
#include "base/task/sequenced_task_runner.h"
#include "base/thread_annotations.h"
#include "media/base/video_types.h"
#include "media/gpu/chromeos/dmabuf_video_frame_pool.h"
#include "media/gpu/media_gpu_export.h"
#include "ui/gfx/gpu_memory_buffer.h"

namespace media {

// Simple frame pool used to avoid unnecessarily allocating and destroying frame
// objects. The pool manages the memory for the frame returned by GetFrame().
// When one of these frames is destroyed, the memory is returned to the pool for
// use by a subsequent GetFrame() call. The memory in the pool is retained for
// the life of the PlatformVideoFramePool object. Before calling GetFrame(), the
// client should call NegotiateFrameFormat(). If the parameters passed to
// NegotiateFrameFormat() are changed, then the memory used by frames with the
// old parameter values will be purged from the pool.
class MEDIA_GPU_EXPORT PlatformVideoFramePool : public DmabufVideoFramePool { … };

}  // namespace media
#endif  // MEDIA_GPU_CHROMEOS_PLATFORM_VIDEO_FRAME_POOL_H_