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/*
* Filter graphs to bad ASCII-art
* Copyright (c) 2012 Nicolas George
*
* 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 <string.h>
#include "libavutil/channel_layout.h"
#include "libavutil/bprint.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "avfiltergraph.h"
static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
{
char *format;
char layout[64];
if (!buf)
buf = &(AVBPrint){ 0 }; /* dummy buffer */
switch (link->type) {
case AVMEDIA_TYPE_VIDEO:
format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
av_bprintf(buf, "[%dx%d %d:%d %s]", link->w, link->h,
link->sample_aspect_ratio.num,
link->sample_aspect_ratio.den,
format);
break;
case AVMEDIA_TYPE_AUDIO:
av_get_channel_layout_string(layout, sizeof(layout),
link->channels, link->channel_layout);
format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
av_bprintf(buf, "[%dHz %s:%s]",
(int)link->sample_rate, format, layout);
break;
default:
av_bprintf(buf, "?");
break;
}
return buf->len;
}
static void avfilter_graph_dump_to_buf(AVBPrint *buf, AVFilterGraph *graph)
{
unsigned i, j, x, e;
for (i = 0; i < graph->nb_filters; i++) {
AVFilterContext *filter = graph->filters[i];
unsigned max_src_name = 0, max_dst_name = 0;
unsigned max_in_name = 0, max_out_name = 0;
unsigned max_in_fmt = 0, max_out_fmt = 0;
unsigned width, height, in_indent;
unsigned lname = strlen(filter->name);
unsigned ltype = strlen(filter->filter->name);
for (j = 0; j < filter->nb_inputs; j++) {
AVFilterLink *l = filter->inputs[j];
unsigned ln = strlen(l->src->name) + 1 + strlen(l->srcpad->name);
max_src_name = FFMAX(max_src_name, ln);
max_in_name = FFMAX(max_in_name, strlen(l->dstpad->name));
max_in_fmt = FFMAX(max_in_fmt, print_link_prop(NULL, l));
}
for (j = 0; j < filter->nb_outputs; j++) {
AVFilterLink *l = filter->outputs[j];
unsigned ln = strlen(l->dst->name) + 1 + strlen(l->dstpad->name);
max_dst_name = FFMAX(max_dst_name, ln);
max_out_name = FFMAX(max_out_name, strlen(l->srcpad->name));
max_out_fmt = FFMAX(max_out_fmt, print_link_prop(NULL, l));
}
in_indent = max_src_name + max_in_name + max_in_fmt;
in_indent += in_indent ? 4 : 0;
width = FFMAX(lname + 2, ltype + 4);
height = FFMAX3(2, filter->nb_inputs, filter->nb_outputs);
av_bprint_chars(buf, ' ', in_indent);
av_bprintf(buf, "+");
av_bprint_chars(buf, '-', width);
av_bprintf(buf, "+\n");
for (j = 0; j < height; j++) {
unsigned in_no = j - (height - filter->nb_inputs ) / 2;
unsigned out_no = j - (height - filter->nb_outputs) / 2;
/* Input link */
if (in_no < filter->nb_inputs) {
AVFilterLink *l = filter->inputs[in_no];
e = buf->len + max_src_name + 2;
av_bprintf(buf, "%s:%s", l->src->name, l->srcpad->name);
av_bprint_chars(buf, '-', e - buf->len);
e = buf->len + max_in_fmt + 2 +
max_in_name - strlen(l->dstpad->name);
print_link_prop(buf, l);
av_bprint_chars(buf, '-', e - buf->len);
av_bprintf(buf, "%s", l->dstpad->name);
} else {
av_bprint_chars(buf, ' ', in_indent);
}
/* Filter */
av_bprintf(buf, "|");
if (j == (height - 2) / 2) {
x = (width - lname) / 2;
av_bprintf(buf, "%*s%-*s", x, "", width - x, filter->name);
} else if (j == (height - 2) / 2 + 1) {
x = (width - ltype - 2) / 2;
av_bprintf(buf, "%*s(%s)%*s", x, "", filter->filter->name,
width - ltype - 2 - x, "");
} else {
av_bprint_chars(buf, ' ', width);
}
av_bprintf(buf, "|");
/* Output link */
if (out_no < filter->nb_outputs) {
AVFilterLink *l = filter->outputs[out_no];
unsigned ln = strlen(l->dst->name) + 1 +
strlen(l->dstpad->name);
e = buf->len + max_out_name + 2;
av_bprintf(buf, "%s", l->srcpad->name);
av_bprint_chars(buf, '-', e - buf->len);
e = buf->len + max_out_fmt + 2 +
max_dst_name - ln;
print_link_prop(buf, l);
av_bprint_chars(buf, '-', e - buf->len);
av_bprintf(buf, "%s:%s", l->dst->name, l->dstpad->name);
}
av_bprintf(buf, "\n");
}
av_bprint_chars(buf, ' ', in_indent);
av_bprintf(buf, "+");
av_bprint_chars(buf, '-', width);
av_bprintf(buf, "+\n");
av_bprintf(buf, "\n");
}
}
char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
{
AVBPrint buf;
char *dump;
av_bprint_init(&buf, 0, 0);
avfilter_graph_dump_to_buf(&buf, graph);
av_bprint_init(&buf, buf.len + 1, buf.len + 1);
avfilter_graph_dump_to_buf(&buf, graph);
av_bprint_finalize(&buf, &dump);
return dump;
}
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