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/*
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* This file is part of FFmpeg.
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*
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* Copyright (c) 2015 Matthieu Bouron <matthieu.bouron stupeflix.com>
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFILTER_FRAMEPOOL_H
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#define AVFILTER_FRAMEPOOL_H
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#include "libavutil/buffer.h"
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#include "libavutil/frame.h"
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/**
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* Video frame pool. This structure is opaque and not meant to be accessed
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* directly. It is allocated with ff_video_frame_pool_init() and freed with
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* ff_video_frame_pool_uninit().
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*/
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typedef struct FFVideoFramePool FFVideoFramePool;
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/**
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* Allocate and initialize a video frame pool.
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*
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* @param alloc a function that will be used to allocate new frame buffers when
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* the pool is empty. May be NULL, then the default allocator will be used
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* (av_buffer_alloc()).
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* @param width width of each frame in this pool
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* @param height height of each frame in this pool
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* @param format format of each frame in this pool
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* @param align buffers alignement of each frame in this pool
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* @return newly created video frame pool on success, NULL on error.
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*/
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FFVideoFramePool *ff_video_frame_pool_init(AVBufferRef* (*alloc)(int size),
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int width,
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int height,
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enum AVPixelFormat format,
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int align);
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/**
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* Deallocate the video frame pool. It is safe to call this function while
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* some of the allocated video frame are still in use.
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*
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* @param pool pointer to the video frame pool to be freed. It will be set to NULL.
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*/
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void ff_video_frame_pool_uninit(FFVideoFramePool **pool);
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/**
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* Get the video frame pool configuration.
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*
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* @param width width of each frame in this pool
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* @param height height of each frame in this pool
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* @param format format of each frame in this pool
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* @param align buffers alignement of each frame in this pool
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* @return 0 on success, a negative AVERROR otherwise.
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*/
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int ff_video_frame_pool_get_config(FFVideoFramePool *pool,
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int *width,
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int *height,
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enum AVPixelFormat *format,
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int *align);
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/**
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* Allocate a new AVFrame, reussing old buffers from the pool when available.
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* This function may be called simultaneously from multiple threads.
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*
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* @return a new AVFrame on success, NULL on error.
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*/
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AVFrame *ff_video_frame_pool_get(FFVideoFramePool *pool);
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#endif /* AVFILTER_FRAMEPOOL_H */
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