96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*
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*
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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_BUFFERSRC_H
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#define AVFILTER_BUFFERSRC_H
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/**
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* @file
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* Memory buffer source API.
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*/
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#include "libavcodec/avcodec.h"
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#include "avfilter.h"
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enum {
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/**
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* Do not check for format changes.
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*/
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AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1,
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/**
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* Do not copy buffer data.
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*/
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AV_BUFFERSRC_FLAG_NO_COPY = 2,
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/**
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* Immediately push the frame to the output.
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*/
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AV_BUFFERSRC_FLAG_PUSH = 4,
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};
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/**
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* Add buffer data in picref to buffer_src.
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*
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* @param buffer_src pointer to a buffer source context
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* @param picref a buffer reference, or NULL to mark EOF
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* @param flags a combination of AV_BUFFERSRC_FLAG_*
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* @return >= 0 in case of success, a negative AVERROR code
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* in case of failure
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*/
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int av_buffersrc_add_ref(AVFilterContext *buffer_src,
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AVFilterBufferRef *picref, int flags);
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/**
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* Get the number of failed requests.
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*
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* A failed request is when the request_frame method is called while no
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* frame is present in the buffer.
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* The number is reset when a frame is added.
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*/
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unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src);
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#ifdef FF_API_BUFFERSRC_BUFFER
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/**
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* Add a buffer to the filtergraph s.
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*
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* @param buf buffer containing frame data to be passed down the filtergraph.
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* This function will take ownership of buf, the user must not free it.
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* A NULL buf signals EOF -- i.e. no more frames will be sent to this filter.
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* @deprecated Use av_buffersrc_add_ref(s, picref, AV_BUFFERSRC_FLAG_NO_COPY) instead.
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*/
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attribute_deprecated
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int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf);
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#endif
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/**
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* Add a frame to the buffer source.
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*
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* @param s an instance of the buffersrc filter.
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* @param frame frame to be added.
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*
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* @warning frame data will be memcpy()ed, which may be a big performance
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* hit. Use av_buffersrc_buffer() to avoid copying the data.
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*/
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int av_buffersrc_write_frame(AVFilterContext *s, const AVFrame *frame);
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#endif /* AVFILTER_BUFFERSRC_H */
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