| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COBALT_MEDIA_BASE_VIDEO_FRAME_POOL_H_ |
| #define COBALT_MEDIA_BASE_VIDEO_FRAME_POOL_H_ |
| |
| #include "base/basictypes.h" |
| #include "cobalt/media/base/media_export.h" |
| #include "cobalt/media/base/video_frame.h" |
| #include "starboard/types.h" |
| |
| namespace cobalt { |
| namespace media { |
| |
| // Simple VideoFrame pool used to avoid unnecessarily allocating and destroying |
| // VideoFrame objects. The pool manages the memory for the VideoFrame |
| // returned by CreateFrame(). When one of these VideoFrames is destroyed, |
| // the memory is returned to the pool for use by a subsequent CreateFrame() |
| // call. The memory in the pool is retained for the life of the |
| // VideoFramePool object. If the parameters passed to CreateFrame() change |
| // during the life of this object, then the memory used by frames with the old |
| // parameter values will be purged from the pool. |
| class MEDIA_EXPORT VideoFramePool { |
| public: |
| VideoFramePool(); |
| ~VideoFramePool(); |
| |
| // Returns a frame from the pool that matches the specified |
| // parameters or creates a new frame if no suitable frame exists in |
| // the pool. The pool is drained if no matching frame is found. |
| // The buffer for the new frame will be zero initialized. Reused frames will |
| // not be zero initialized. |
| scoped_refptr<VideoFrame> CreateFrame(VideoPixelFormat format, |
| const gfx::Size& coded_size, |
| const gfx::Rect& visible_rect, |
| const gfx::Size& natural_size, |
| base::TimeDelta timestamp); |
| |
| protected: |
| friend class VideoFramePoolTest; |
| |
| // Returns the number of frames in the pool for testing purposes. |
| size_t GetPoolSizeForTesting() const; |
| |
| private: |
| class PoolImpl; |
| scoped_refptr<PoolImpl> pool_; |
| |
| DISALLOW_COPY_AND_ASSIGN(VideoFramePool); |
| }; |
| |
| } // namespace media |
| } // namespace cobalt |
| |
| #endif // COBALT_MEDIA_BASE_VIDEO_FRAME_POOL_H_ |