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ffmpeg / tools / lavfi-showfiltfmts.c @ 24de0edb

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/*
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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_pix_fmt_descriptors[fmts->formats[j]].name);
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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_pix_fmt_descriptors[fmts->formats[j]].name);
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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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}