2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/internal.h"
32 static int request_frame(AVFilterLink *link)
37 static const AVFilterPad avfilter_asrc_anullsrc_outputs[] = {
40 .type = AVMEDIA_TYPE_AUDIO,
41 .request_frame = request_frame,
46 AVFilter ff_asrc_anullsrc = {
48 .description = NULL_IF_CONFIG_SMALL("Null audio source, never return audio frames."),
52 .outputs = avfilter_asrc_anullsrc_outputs,