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https://github.com/FFmpeg/FFmpeg.git
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4ae28eb853
Use av_get_pix_fmt_name() rather than access av_pix_fmt_descriptors. Improve readability.
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/*
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* Copyright (c) 2009 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavformat/avformat.h"
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#include "libavutil/pixdesc.h"
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#include "libavfilter/avfilter.h"
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int main(int argc, char **argv)
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{
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AVFilter *filter;
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AVFilterContext *filter_ctx;
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const char *filter_name;
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const char *filter_args = NULL;
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int i, j;
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av_log_set_level(AV_LOG_DEBUG);
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if (!argv[1]) {
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fprintf(stderr, "Missing filter name as argument\n");
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return 1;
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}
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filter_name = argv[1];
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if (argv[2])
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filter_args = argv[2];
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avfilter_register_all();
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/* get a corresponding filter and open it */
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if (!(filter = avfilter_get_by_name(filter_name))) {
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fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
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return 1;
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}
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if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
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fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name);
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return 1;
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}
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if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
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fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n", filter_name, filter_args);
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return 1;
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}
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/* create a link for each of the input pads */
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for (i = 0; i < filter_ctx->input_count; i++) {
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AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
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link->type = filter_ctx->filter->inputs[i].type;
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filter_ctx->inputs[i] = link;
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}
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for (i = 0; i < filter_ctx->output_count; i++) {
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AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
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link->type = filter_ctx->filter->outputs[i].type;
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filter_ctx->outputs[i] = link;
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}
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if (filter->query_formats)
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filter->query_formats(filter_ctx);
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else
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avfilter_default_query_formats(filter_ctx);
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/* print the supported formats in input */
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for (i = 0; i < filter_ctx->input_count; i++) {
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AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
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for (j = 0; j < fmts->format_count; j++)
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printf("INPUT[%d] %s: %s\n",
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i, filter_ctx->filter->inputs[i].name,
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av_get_pix_fmt_name(fmts->formats[j]));
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}
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/* print the supported formats in output */
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for (i = 0; i < filter_ctx->output_count; i++) {
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AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
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for (j = 0; j < fmts->format_count; j++)
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printf("OUTPUT[%d] %s: %s\n",
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i, filter_ctx->filter->outputs[i].name,
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av_get_pix_fmt_name(fmts->formats[j]));
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}
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avfilter_free(filter_ctx);
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fflush(stdout);
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return 0;
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}
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