105711e9ad
Bug: webrtc:12701 Change-Id: If49095b101c1a1763c2a44a0284c0d670cce953f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/265390 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#37219}
79 lines
3.2 KiB
C++
79 lines
3.2 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_POOL_H_
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#define COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_POOL_H_
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#include <stddef.h>
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#include <list>
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#include "api/scoped_refptr.h"
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#include "api/video/i420_buffer.h"
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#include "api/video/i422_buffer.h"
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#include "api/video/i444_buffer.h"
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#include "api/video/nv12_buffer.h"
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#include "rtc_base/race_checker.h"
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namespace webrtc {
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// Simple buffer pool to avoid unnecessary allocations of video frame buffers.
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// The pool manages the memory of the I420Buffer/NV12Buffer returned from
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// Create(I420|NV12)Buffer. When the buffer is destructed, the memory is
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// returned to the pool for use by subsequent calls to Create(I420|NV12)Buffer.
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// If the resolution passed to Create(I420|NV12)Buffer changes or requested
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// pixel format changes, old buffers will be purged from the pool.
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// Note that Create(I420|NV12)Buffer will crash if more than
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// kMaxNumberOfFramesBeforeCrash are created. This is to prevent memory leaks
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// where frames are not returned.
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class VideoFrameBufferPool {
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public:
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VideoFrameBufferPool();
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explicit VideoFrameBufferPool(bool zero_initialize);
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VideoFrameBufferPool(bool zero_initialize, size_t max_number_of_buffers);
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~VideoFrameBufferPool();
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// Returns a buffer from the pool. If no suitable buffer exist in the pool
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// and there are less than `max_number_of_buffers` pending, a buffer is
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// created. Returns null otherwise.
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rtc::scoped_refptr<I420Buffer> CreateI420Buffer(int width, int height);
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rtc::scoped_refptr<I422Buffer> CreateI422Buffer(int width, int height);
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rtc::scoped_refptr<I444Buffer> CreateI444Buffer(int width, int height);
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rtc::scoped_refptr<NV12Buffer> CreateNV12Buffer(int width, int height);
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// Changes the max amount of buffers in the pool to the new value.
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// Returns true if change was successful and false if the amount of already
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// allocated buffers is bigger than new value.
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bool Resize(size_t max_number_of_buffers);
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// Clears buffers_ and detaches the thread checker so that it can be reused
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// later from another thread.
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void Release();
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private:
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rtc::scoped_refptr<VideoFrameBuffer>
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GetExistingBuffer(int width, int height, VideoFrameBuffer::Type type);
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rtc::RaceChecker race_checker_;
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std::list<rtc::scoped_refptr<VideoFrameBuffer>> buffers_;
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// If true, newly allocated buffers are zero-initialized. Note that recycled
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// buffers are not zero'd before reuse. This is required of buffers used by
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// FFmpeg according to http://crbug.com/390941, which only requires it for the
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// initial allocation (as shown by FFmpeg's own buffer allocation code). It
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// has to do with "Use-of-uninitialized-value" on "Linux_msan_chrome".
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const bool zero_initialize_;
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// Max number of buffers this pool can have pending.
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size_t max_number_of_buffers_;
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};
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} // namespace webrtc
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#endif // COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_POOL_H_
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