ffmpeg/libavfilter/graphdump.c

172 lines
6.1 KiB
C

/*
* 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/pixdesc.h"
#include "avfilter.h"
#include "avfiltergraph.h"
#define BPRINTF(...) \
cur += snprintf(cur, buf_end - FFMIN(cur, buf_end), __VA_ARGS__)
#define BPAD(c, l) \
do { \
if (cur < buf_end) memset(cur, c, FFMIN(l, buf_end - cur)); cur += l; \
} while (0)
static int snprint_link_prop(char *buf, char *buf_end, AVFilterLink *link)
{
char *cur = buf, *format;
char layout[64];
switch (link->type) {
case AVMEDIA_TYPE_VIDEO:
format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
BPRINTF("[%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),
-1, link->channel_layout);
format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
BPRINTF("[%dHz %s:%s:%s]",
(int)link->sample_rate, format, layout,
link->planar ? "planar" : "packed");
break;
default:
BPRINTF("?");
break;
}
return cur - buf;
}
static size_t avfilter_graph_dump_to_buf(AVFilterGraph *graph,
char *buf, char *buf_end)
{
char *cur = buf, *e;
unsigned i, j, x;
for (i = 0; i < graph->filter_count; 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->input_count; 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, snprint_link_prop(NULL, NULL, l));
}
for (j = 0; j < filter->output_count; 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, snprint_link_prop(NULL, 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->input_count, filter->output_count);
BPAD(' ', in_indent);
BPRINTF("+");
BPAD('-', width);
BPRINTF("+\n");
for (j = 0; j < height; j++) {
unsigned in_no = j - (height - filter->input_count ) / 2;
unsigned out_no = j - (height - filter->output_count) / 2;
/* Input link */
if (in_no < filter->input_count) {
AVFilterLink *l = filter->inputs[in_no];
e = cur + max_src_name + 2;
BPRINTF("%s:%s", l->src->name, l->srcpad->name);
BPAD('-', e - cur);
e = cur + max_in_fmt + 2 +
max_in_name - strlen(l->dstpad->name);
cur += snprint_link_prop(cur, buf_end, l);
BPAD('-', e - cur);
BPRINTF("%s", l->dstpad->name);
} else {
BPAD(' ', in_indent);
}
/* Filter */
BPRINTF("|");
if (j == (height - 2) / 2) {
x = (width - lname) / 2;
BPRINTF("%*s%-*s", x, "", width - x, filter->name);
} else if (j == (height - 2) / 2 + 1) {
x = (width - ltype - 2) / 2;
BPRINTF("%*s(%s)%*s", x, "", filter->filter->name,
width - ltype - 2 - x, "");
} else {
BPAD(' ', width);
}
BPRINTF("|");
/* Output link */
if (out_no < filter->output_count) {
AVFilterLink *l = filter->outputs[out_no];
unsigned ln = strlen(l->dst->name) + 1 +
strlen(l->dstpad->name);
e = cur + max_out_name + 2;
BPRINTF("%s", l->srcpad->name);
BPAD('-', e - cur);
e = cur + max_out_fmt + 2 +
max_dst_name - ln;
cur += snprint_link_prop(cur, buf_end, l);
BPAD('-', e - cur);
BPRINTF("%s:%s", l->dst->name, l->dstpad->name);
}
BPRINTF("\n");
}
BPAD(' ', in_indent);
BPRINTF("+");
BPAD('-', width);
BPRINTF("+\n");
BPRINTF("\n");
}
if (cur < buf_end)
*(cur++) = 0;
return cur - buf;
}
char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
{
size_t buf_size = avfilter_graph_dump_to_buf(graph, NULL, NULL);
char *buf = av_malloc(buf_size);
if (!buf)
return NULL;
avfilter_graph_dump_to_buf(graph, buf, buf + buf_size);
return buf;
}