/*
 * Copyright (c) 2008 Vitor Sessak
 *
 * This file is part of FFmpeg.
 *
 * 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_VSRC_BUFFER_H
#define AVFILTER_VSRC_BUFFER_H

/**
 * @file
 * memory buffer source API for video
 */

#include "avfilter.h"

/**
 * Tell av_vsrc_buffer_add_video_buffer_ref() to overwrite the already
 * cached video buffer with the new added one, otherwise the function
 * will complain and exit.
 */
#define AV_VSRC_BUF_FLAG_OVERWRITE 1

/**
 * Add video buffer data in picref to buffer_src.
 *
 * @param buffer_src pointer to a buffer source context
 * @param flags a combination of AV_VSRC_BUF_FLAG_* flags
 * @return >= 0 in case of success, a negative AVERROR code in case of
 * failure
 */
int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_src,
                                        AVFilterBufferRef *picref, int flags);

/**
 * Get the number of failed requests.
 *
 * A failed request is when the request_frame method is called while no
 * frame is present in the buffer.
 * The number is reset when a frame is added.
 */
unsigned av_vsrc_buffer_get_nb_failed_requests(AVFilterContext *buffer_src);

#endif /* AVFILTER_VSRC_BUFFER_H */
