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/*
* Copyright (c) 2009 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/samplefmt.h"
#define FF_INTERNAL_FIELDS 1
#include "libavfilter/framequeue.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/formats.h"
#include "libavfilter/internal.h"
static void print_formats_internal(AVFilterLink **links, const AVFilterPad *pads,
unsigned nb, size_t fmts_cfg_offset,
const char *inout_string)
{
for (unsigned i = 0; i < nb; i++) {
const AVFilterLink *const link = links[i];
const AVFilterFormatsConfig *const cfg = (AVFilterFormatsConfig*)((const char*)link + fmts_cfg_offset);
const char *pad_name = avfilter_pad_get_name(pads, i);
if (link->type == AVMEDIA_TYPE_VIDEO) {
const AVFilterFormats *const fmts = cfg->formats;
for (unsigned j = 0; fmts && j < fmts->nb_formats; j++) {
printf("%s[%u] %s: fmt:%s\n",
inout_string, i, pad_name,
av_get_pix_fmt_name(fmts->formats[j]));
}
} else if (link->type == AVMEDIA_TYPE_AUDIO) {
const AVFilterFormats *const fmts = cfg->formats;
const AVFilterChannelLayouts *const layouts = cfg->channel_layouts;
for (unsigned j = 0; fmts && j < fmts->nb_formats; j++)
printf("%s[%u] %s: fmt:%s\n",
inout_string, i, pad_name,
av_get_sample_fmt_name(fmts->formats[j]));
for (unsigned j = 0; layouts && j < layouts->nb_channel_layouts; j++) {
char buf[256];
av_get_channel_layout_string(buf, sizeof(buf), -1,
layouts->channel_layouts[j]);
printf("%s[%u] %s: chlayout:%s\n",
inout_string, i, pad_name, buf);
}
}
}
}
static void print_formats(AVFilterContext *filter_ctx)
{
print_formats_internal(filter_ctx->inputs, filter_ctx->input_pads,
filter_ctx->nb_inputs,
offsetof(AVFilterLink, outcfg), "INPUT");
print_formats_internal(filter_ctx->outputs, filter_ctx->output_pads,
filter_ctx->nb_outputs,
offsetof(AVFilterLink, incfg), "OUTPUT");
}
int main(int argc, char **argv)
{
const AVFilter *filter;
AVFilterContext *filter_ctx;
AVFilterGraph *graph_ctx;
const char *filter_name;
const char *filter_args = NULL;
int i;
int ret = 0;
av_log_set_level(AV_LOG_DEBUG);
if (argc < 2) {
fprintf(stderr, "Missing filter name as argument\n");
return 1;
}
filter_name = argv[1];
if (argc > 2)
filter_args = argv[2];
/* allocate graph */
graph_ctx = avfilter_graph_alloc();
if (!graph_ctx)
return 1;
/* get a corresponding filter and open it */
if (!(filter = avfilter_get_by_name(filter_name))) {
fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
return 1;
}
/* open filter and add it to the graph */
if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
fprintf(stderr, "Impossible to open filter with name '%s'\n",
filter_name);
return 1;
}
if (avfilter_init_str(filter_ctx, filter_args) < 0) {
fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
filter_name, filter_args);
return 1;
}
/* create a link for each of the input pads */
for (i = 0; i < filter_ctx->nb_inputs; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
if (!link) {
fprintf(stderr, "Unable to allocate memory for filter input link\n");
ret = 1;
goto fail;
}
link->type = avfilter_pad_get_type(filter_ctx->input_pads, i);
filter_ctx->inputs[i] = link;
}
for (i = 0; i < filter_ctx->nb_outputs; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
if (!link) {
fprintf(stderr, "Unable to allocate memory for filter output link\n");
ret = 1;
goto fail;
}
link->type = avfilter_pad_get_type(filter_ctx->output_pads, i);
filter_ctx->outputs[i] = link;
}
if (filter->formats_state == FF_FILTER_FORMATS_QUERY_FUNC)
ret = filter->formats.query_func(filter_ctx);
else
ret = ff_default_query_formats(filter_ctx);
print_formats(filter_ctx);
fail:
avfilter_free(filter_ctx);
avfilter_graph_free(&graph_ctx);
fflush(stdout);
return ret;
}
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