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76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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_BUFFERSINK_H
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#define AVFILTER_BUFFERSINK_H
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/**
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* @file
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* @ingroup lavfi_buffersink
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* memory buffer sink API
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*/
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#include "avfilter.h"
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/**
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* @defgroup lavfi_buffersink Buffer sink API
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* @ingroup lavfi
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* @{
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*/
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/**
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* Get a frame with filtered data from sink and put it in frame.
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*
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* @param ctx pointer to a context of a buffersink or abuffersink AVFilter.
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* @param frame pointer to an allocated frame that will be filled with data.
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* The data must be freed using av_frame_unref() / av_frame_free()
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*
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* @return
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* - >= 0 if a frame was successfully returned.
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* - AVERROR(EAGAIN) if no frames are available at this point; more
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* input frames must be added to the filtergraph to get more output.
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* - AVERROR_EOF if there will be no more output frames on this sink.
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* - A different negative AVERROR code in other failure cases.
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*/
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int av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame);
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/**
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* Same as av_buffersink_get_frame(), but with the ability to specify the number
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* of samples read. This function is less efficient than
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* av_buffersink_get_frame(), because it copies the data around.
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*
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* @param ctx pointer to a context of the abuffersink AVFilter.
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* @param frame pointer to an allocated frame that will be filled with data.
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* The data must be freed using av_frame_unref() / av_frame_free()
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* frame will contain exactly nb_samples audio samples, except at
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* the end of stream, when it can contain less than nb_samples.
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*
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* @return The return codes have the same meaning as for
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* av_buffersink_get_samples().
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*
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* @warning do not mix this function with av_buffersink_get_frame(). Use only one or
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* the other with a single sink, not both.
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*/
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int av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples);
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/**
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* @}
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*/
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#endif /* AVFILTER_BUFFERSINK_H */
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