Libav 0.7.1
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00001 /* 00002 * Copyright (c) 2009 Stefano Sabatini 00003 * 00004 * This file is part of Libav. 00005 * 00006 * Libav is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * Libav is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with Libav; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #include "libavformat/avformat.h" 00022 #include "libavutil/pixdesc.h" 00023 #include "libavfilter/avfilter.h" 00024 00025 int main(int argc, char **argv) 00026 { 00027 AVFilter *filter; 00028 AVFilterContext *filter_ctx; 00029 const char *filter_name; 00030 const char *filter_args = NULL; 00031 int i, j; 00032 00033 av_log_set_level(AV_LOG_DEBUG); 00034 00035 if (!argv[1]) { 00036 fprintf(stderr, "Missing filter name as argument\n"); 00037 return 1; 00038 } 00039 00040 filter_name = argv[1]; 00041 if (argv[2]) 00042 filter_args = argv[2]; 00043 00044 avfilter_register_all(); 00045 00046 /* get a corresponding filter and open it */ 00047 if (!(filter = avfilter_get_by_name(filter_name))) { 00048 fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name); 00049 return 1; 00050 } 00051 00052 if (avfilter_open(&filter_ctx, filter, NULL) < 0) { 00053 fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name); 00054 return 1; 00055 } 00056 if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) { 00057 fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n", filter_name, filter_args); 00058 return 1; 00059 } 00060 00061 /* create a link for each of the input pads */ 00062 for (i = 0; i < filter_ctx->input_count; i++) { 00063 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink)); 00064 link->type = filter_ctx->filter->inputs[i].type; 00065 filter_ctx->inputs[i] = link; 00066 } 00067 for (i = 0; i < filter_ctx->output_count; i++) { 00068 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink)); 00069 link->type = filter_ctx->filter->outputs[i].type; 00070 filter_ctx->outputs[i] = link; 00071 } 00072 00073 if (filter->query_formats) 00074 filter->query_formats(filter_ctx); 00075 else 00076 avfilter_default_query_formats(filter_ctx); 00077 00078 /* print the supported formats in input */ 00079 for (i = 0; i < filter_ctx->input_count; i++) { 00080 AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats; 00081 for (j = 0; j < fmts->format_count; j++) 00082 printf("INPUT[%d] %s: %s\n", 00083 i, filter_ctx->filter->inputs[i].name, 00084 av_pix_fmt_descriptors[fmts->formats[j]].name); 00085 } 00086 00087 /* print the supported formats in output */ 00088 for (i = 0; i < filter_ctx->output_count; i++) { 00089 AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats; 00090 for (j = 0; j < fmts->format_count; j++) 00091 printf("OUTPUT[%d] %s: %s\n", 00092 i, filter_ctx->filter->outputs[i].name, 00093 av_pix_fmt_descriptors[fmts->formats[j]].name); 00094 } 00095 00096 avfilter_free(filter_ctx); 00097 fflush(stdout); 00098 return 0; 00099 }