FFmpeg/libavfilter/buffersink.h

/*
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVFILTER_BUFFERSINK_H
#define AVFILTER_BUFFERSINK_H

/**
 * @file
 * memory buffer sink API
 */

#include "avfilter.h"

/**
 * Get a buffer with filtered data from sink and put it in buf.
 *
 * @param sink pointer to a context of a buffersink AVFilter.
 * @param buf pointer to the buffer will be written here if buf is non-NULL. buf
 *            must be freed by the caller using avfilter_unref_buffer().
 *            Buf may also be NULL to query whether a buffer is ready to be
 *            output.
 *
 * @return >= 0 in case of success, a negative AVERROR code in case of
 *         failure.
 */
int av_buffersink_read(AVFilterContext *sink, AVFilterBufferRef **buf);

#endif /* AVFILTER_BUFFERSINK_H */