1/* 2 * Filter graphs 3 * copyright (c) 2007 Bobby Bingham 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#ifndef AVFILTER_AVFILTERGRAPH_H 23#define AVFILTER_AVFILTERGRAPH_H 24 25#include "avfilter.h" 26 27typedef struct AVFilterGraph { 28 unsigned filter_count; 29 AVFilterContext **filters; 30 31 char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters 32} AVFilterGraph; 33 34/** 35 * Gets a filter instance with name name from graph. 36 * 37 * @return the pointer to the found filter instance or NULL if it 38 * cannot be found. 39 */ 40AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name); 41 42/** 43 * Adds an existing filter instance to a filter graph. 44 * 45 * @param graph the filter graph 46 * @param filter the filter to be added 47 */ 48int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter); 49 50/** 51 * Checks for the validity of graph. 52 * 53 * A graph is considered valid if all its input and output pads are 54 * connected. 55 * 56 * @return 0 in case of success, a negative value otherwise 57 */ 58int avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx); 59 60/** 61 * Configures all the links of graphctx. 62 * 63 * @return 0 in case of success, a negative value otherwise 64 */ 65int avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx); 66 67/** 68 * Configures the formats of all the links in the graph. 69 */ 70int avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx); 71 72/** 73 * Frees a graph and destroys its links. 74 */ 75void avfilter_graph_destroy(AVFilterGraph *graph); 76 77#endif /* AVFILTER_AVFILTERGRAPH_H */ 78