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/channel_layout.h"
25 #include "libavutil/bprint.h"
26 #include "libavutil/pixdesc.h"
28 #include "avfiltergraph.h"
30 static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
36 buf = &(AVBPrint){ 0 }; /* dummy buffer */
38 case AVMEDIA_TYPE_VIDEO:
39 format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
40 av_bprintf(buf, "[%dx%d %d:%d %s]", link->w, link->h,
41 link->sample_aspect_ratio.num,
42 link->sample_aspect_ratio.den,
46 case AVMEDIA_TYPE_AUDIO:
47 av_get_channel_layout_string(layout, sizeof(layout),
48 -1, link->channel_layout);
49 format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
50 av_bprintf(buf, "[%dHz %s:%s]",
51 (int)link->sample_rate, format, layout);
61 static void avfilter_graph_dump_to_buf(AVBPrint *buf, AVFilterGraph *graph)
65 for (i = 0; i < graph->filter_count; i++) {
66 AVFilterContext *filter = graph->filters[i];
67 unsigned max_src_name = 0, max_dst_name = 0;
68 unsigned max_in_name = 0, max_out_name = 0;
69 unsigned max_in_fmt = 0, max_out_fmt = 0;
70 unsigned width, height, in_indent;
71 unsigned lname = strlen(filter->name);
72 unsigned ltype = strlen(filter->filter->name);
74 for (j = 0; j < filter->input_count; j++) {
75 AVFilterLink *l = filter->inputs[j];
76 unsigned ln = strlen(l->src->name) + 1 + strlen(l->srcpad->name);
77 max_src_name = FFMAX(max_src_name, ln);
78 max_in_name = FFMAX(max_in_name, strlen(l->dstpad->name));
79 max_in_fmt = FFMAX(max_in_fmt, print_link_prop(NULL, l));
81 for (j = 0; j < filter->output_count; j++) {
82 AVFilterLink *l = filter->outputs[j];
83 unsigned ln = strlen(l->dst->name) + 1 + strlen(l->dstpad->name);
84 max_dst_name = FFMAX(max_dst_name, ln);
85 max_out_name = FFMAX(max_out_name, strlen(l->srcpad->name));
86 max_out_fmt = FFMAX(max_out_fmt, print_link_prop(NULL, l));
88 in_indent = max_src_name + max_in_name + max_in_fmt;
89 in_indent += in_indent ? 4 : 0;
90 width = FFMAX(lname + 2, ltype + 4);
91 height = FFMAX3(2, filter->input_count, filter->output_count);
92 av_bprint_chars(buf, ' ', in_indent);
94 av_bprint_chars(buf, '-', width);
95 av_bprintf(buf, "+\n");
96 for (j = 0; j < height; j++) {
97 unsigned in_no = j - (height - filter->input_count ) / 2;
98 unsigned out_no = j - (height - filter->output_count) / 2;
101 if (in_no < filter->input_count) {
102 AVFilterLink *l = filter->inputs[in_no];
103 e = buf->len + max_src_name + 2;
104 av_bprintf(buf, "%s:%s", l->src->name, l->srcpad->name);
105 av_bprint_chars(buf, '-', e - buf->len);
106 e = buf->len + max_in_fmt + 2 +
107 max_in_name - strlen(l->dstpad->name);
108 print_link_prop(buf, l);
109 av_bprint_chars(buf, '-', e - buf->len);
110 av_bprintf(buf, "%s", l->dstpad->name);
112 av_bprint_chars(buf, ' ', in_indent);
116 av_bprintf(buf, "|");
117 if (j == (height - 2) / 2) {
118 x = (width - lname) / 2;
119 av_bprintf(buf, "%*s%-*s", x, "", width - x, filter->name);
120 } else if (j == (height - 2) / 2 + 1) {
121 x = (width - ltype - 2) / 2;
122 av_bprintf(buf, "%*s(%s)%*s", x, "", filter->filter->name,
123 width - ltype - 2 - x, "");
125 av_bprint_chars(buf, ' ', width);
127 av_bprintf(buf, "|");
130 if (out_no < filter->output_count) {
131 AVFilterLink *l = filter->outputs[out_no];
132 unsigned ln = strlen(l->dst->name) + 1 +
133 strlen(l->dstpad->name);
134 e = buf->len + max_out_name + 2;
135 av_bprintf(buf, "%s", l->srcpad->name);
136 av_bprint_chars(buf, '-', e - buf->len);
137 e = buf->len + max_out_fmt + 2 +
139 print_link_prop(buf, l);
140 av_bprint_chars(buf, '-', e - buf->len);
141 av_bprintf(buf, "%s:%s", l->dst->name, l->dstpad->name);
143 av_bprintf(buf, "\n");
145 av_bprint_chars(buf, ' ', in_indent);
146 av_bprintf(buf, "+");
147 av_bprint_chars(buf, '-', width);
148 av_bprintf(buf, "+\n");
149 av_bprintf(buf, "\n");
153 char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
158 av_bprint_init(&buf, 0, 0);
159 avfilter_graph_dump_to_buf(&buf, graph);
160 av_bprint_init(&buf, buf.len + 1, buf.len + 1);
161 avfilter_graph_dump_to_buf(&buf, graph);
162 av_bprint_finalize(&buf, &dump);