3 * This file is part of Libav.
5 * Libav is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * Libav is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with Libav; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 #ifndef AVFILTER_BUFFERSRC_H
21 #define AVFILTER_BUFFERSRC_H
25 * Memory buffer source API.
28 #include "libavcodec/avcodec.h"
34 * Do not check for format changes.
36 AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1,
39 * Do not copy buffer data.
41 AV_BUFFERSRC_FLAG_NO_COPY = 2,
44 * Immediately push the frame to the output.
46 AV_BUFFERSRC_FLAG_PUSH = 4,
51 * Add buffer data in picref to buffer_src.
53 * @param buffer_src pointer to a buffer source context
54 * @param picref a buffer reference, or NULL to mark EOF
55 * @param flags a combination of AV_BUFFERSRC_FLAG_*
56 * @return >= 0 in case of success, a negative AVERROR code
59 int av_buffersrc_add_ref(AVFilterContext *buffer_src,
60 AVFilterBufferRef *picref, int flags);
63 * Get the number of failed requests.
65 * A failed request is when the request_frame method is called while no
66 * frame is present in the buffer.
67 * The number is reset when a frame is added.
69 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src);
71 #ifdef FF_API_BUFFERSRC_BUFFER
73 * Add a buffer to the filtergraph s.
75 * @param buf buffer containing frame data to be passed down the filtergraph.
76 * This function will take ownership of buf, the user must not free it.
77 * A NULL buf signals EOF -- i.e. no more frames will be sent to this filter.
78 * @deprecated Use av_buffersrc_add_ref(s, picref, AV_BUFFERSRC_FLAG_NO_COPY) instead.
81 int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf);
85 * Add a frame to the buffer source.
87 * @param s an instance of the buffersrc filter.
88 * @param frame frame to be added.
90 * @warning frame data will be memcpy()ed, which may be a big performance
91 * hit. Use av_buffersrc_buffer() to avoid copying the data.
93 int av_buffersrc_write_frame(AVFilterContext *s, const AVFrame *frame);
95 #endif /* AVFILTER_BUFFERSRC_H */