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