1 /* 2 * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram <smeenaks@ucsd.edu> 3 * This file is part of FFmpeg. 4 * 5 * FFmpeg 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. 9 * 10 * FFmpeg 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. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with FFmpeg; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /** 21 * @file 22 * null audio filter 23 */ 24 25 #include "audio.h" 26 #include "avfilter.h" 27 #include "internal.h" 28 #include "libavutil/internal.h" 29 30 static const AVFilterPad avfilter_af_anull_inputs[] = { 31 { 32 .name = "default", 33 .type = AVMEDIA_TYPE_AUDIO, 34 }, 35 }; 36 37 static const AVFilterPad avfilter_af_anull_outputs[] = { 38 { 39 .name = "default", 40 .type = AVMEDIA_TYPE_AUDIO, 41 }, 42 }; 43 44 const AVFilter ff_af_anull = { 45 .name = "anull", 46 .description = NULL_IF_CONFIG_SMALL("Pass the source unchanged to the output."), 47 .flags = AVFILTER_FLAG_METADATA_ONLY, 48 FILTER_INPUTS(avfilter_af_anull_inputs), 49 FILTER_OUTPUTS(avfilter_af_anull_outputs), 50 }; 51