2 * Filter graphs to bad ASCII-art
3 * Copyright (c) 2012 Nicolas George
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/bprint.h"
25 #include "libavutil/pixdesc.h"
27 #include "avfiltergraph.h"
29 static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
35 buf = &(AVBPrint){ 0 }; /* dummy buffer */
37 case AVMEDIA_TYPE_VIDEO:
38 format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
39 av_bprintf(buf, "[%dx%d %d:%d %s]", link->w, link->h,
40 link->sample_aspect_ratio.num,
41 link->sample_aspect_ratio.den,
45 case AVMEDIA_TYPE_AUDIO:
46 av_get_channel_layout_string(layout, sizeof(layout),
47 -1, link->channel_layout);
48 format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
49 av_bprintf(buf, "[%dHz %s:%s]",
50 (int)link->sample_rate, format, layout);
60 static void avfilter_graph_dump_to_buf(AVBPrint *buf, AVFilterGraph *graph)
64 for (i = 0; i < graph->filter_count; i++) {
65 AVFilterContext *filter = graph->filters[i];
66 unsigned max_src_name = 0, max_dst_name = 0;
67 unsigned max_in_name = 0, max_out_name = 0;
68 unsigned max_in_fmt = 0, max_out_fmt = 0;
69 unsigned width, height, in_indent;
70 unsigned lname = strlen(filter->name);
71 unsigned ltype = strlen(filter->filter->name);
73 for (j = 0; j < filter->input_count; j++) {
74 AVFilterLink *l = filter->inputs[j];
75 unsigned ln = strlen(l->src->name) + 1 + strlen(l->srcpad->name);
76 max_src_name = FFMAX(max_src_name, ln);
77 max_in_name = FFMAX(max_in_name, strlen(l->dstpad->name));
78 max_in_fmt = FFMAX(max_in_fmt, print_link_prop(NULL, l));
80 for (j = 0; j < filter->output_count; j++) {
81 AVFilterLink *l = filter->outputs[j];
82 unsigned ln = strlen(l->dst->name) + 1 + strlen(l->dstpad->name);
83 max_dst_name = FFMAX(max_dst_name, ln);
84 max_out_name = FFMAX(max_out_name, strlen(l->srcpad->name));
85 max_out_fmt = FFMAX(max_out_fmt, print_link_prop(NULL, l));
87 in_indent = max_src_name + max_in_name + max_in_fmt;
88 in_indent += in_indent ? 4 : 0;
89 width = FFMAX(lname + 2, ltype + 4);
90 height = FFMAX3(2, filter->input_count, filter->output_count);
91 av_bprint_chars(buf, ' ', in_indent);
93 av_bprint_chars(buf, '-', width);
94 av_bprintf(buf, "+\n");
95 for (j = 0; j < height; j++) {
96 unsigned in_no = j - (height - filter->input_count ) / 2;
97 unsigned out_no = j - (height - filter->output_count) / 2;
100 if (in_no < filter->input_count) {
101 AVFilterLink *l = filter->inputs[in_no];
102 e = buf->len + max_src_name + 2;
103 av_bprintf(buf, "%s:%s", l->src->name, l->srcpad->name);
104 av_bprint_chars(buf, '-', e - buf->len);
105 e = buf->len + max_in_fmt + 2 +
106 max_in_name - strlen(l->dstpad->name);
107 print_link_prop(buf, l);
108 av_bprint_chars(buf, '-', e - buf->len);
109 av_bprintf(buf, "%s", l->dstpad->name);
111 av_bprint_chars(buf, ' ', in_indent);
115 av_bprintf(buf, "|");
116 if (j == (height - 2) / 2) {
117 x = (width - lname) / 2;
118 av_bprintf(buf, "%*s%-*s", x, "", width - x, filter->name);
119 } else if (j == (height - 2) / 2 + 1) {
120 x = (width - ltype - 2) / 2;
121 av_bprintf(buf, "%*s(%s)%*s", x, "", filter->filter->name,
122 width - ltype - 2 - x, "");
124 av_bprint_chars(buf, ' ', width);
126 av_bprintf(buf, "|");
129 if (out_no < filter->output_count) {
130 AVFilterLink *l = filter->outputs[out_no];
131 unsigned ln = strlen(l->dst->name) + 1 +
132 strlen(l->dstpad->name);
133 e = buf->len + max_out_name + 2;
134 av_bprintf(buf, "%s", l->srcpad->name);
135 av_bprint_chars(buf, '-', e - buf->len);
136 e = buf->len + max_out_fmt + 2 +
138 print_link_prop(buf, l);
139 av_bprint_chars(buf, '-', e - buf->len);
140 av_bprintf(buf, "%s:%s", l->dst->name, l->dstpad->name);
142 av_bprintf(buf, "\n");
144 av_bprint_chars(buf, ' ', in_indent);
145 av_bprintf(buf, "+");
146 av_bprint_chars(buf, '-', width);
147 av_bprintf(buf, "+\n");
148 av_bprintf(buf, "\n");
152 char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
157 av_bprint_init(&buf, 0, 0);
158 avfilter_graph_dump_to_buf(&buf, graph);
159 av_bprint_init(&buf, buf.len + 1, buf.len + 1);
160 avfilter_graph_dump_to_buf(&buf, graph);
161 av_bprint_finalize(&buf, &dump);