1 /*
2 * Filter graphs to bad ASCII-art
3 * Copyright (c) 2012 Nicolas George
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #include <string.h>
23
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/bprint.h"
26 #include "libavutil/pixdesc.h"
27 #include "avfilter.h"
28 #include "internal.h"
29
print_link_prop(AVBPrint * buf,AVFilterLink * link)30 static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
31 {
32 char *format;
33 char layout[64];
34 AVBPrint dummy_buffer = { 0 };
35
36 if (!buf)
37 buf = &dummy_buffer;
38 switch (link->type) {
39 case AVMEDIA_TYPE_VIDEO:
40 format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
41 av_bprintf(buf, "[%dx%d %d:%d %s]", link->w, link->h,
42 link->sample_aspect_ratio.num,
43 link->sample_aspect_ratio.den,
44 format);
45 break;
46
47 case AVMEDIA_TYPE_AUDIO:
48 av_get_channel_layout_string(layout, sizeof(layout),
49 link->channels, link->channel_layout);
50 format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
51 av_bprintf(buf, "[%dHz %s:%s]",
52 (int)link->sample_rate, format, layout);
53 break;
54
55 default:
56 av_bprintf(buf, "?");
57 break;
58 }
59 return buf->len;
60 }
61
avfilter_graph_dump_to_buf(AVBPrint * buf,AVFilterGraph * graph)62 static void avfilter_graph_dump_to_buf(AVBPrint *buf, AVFilterGraph *graph)
63 {
64 unsigned i, j, x, e;
65
66 for (i = 0; i < graph->nb_filters; i++) {
67 AVFilterContext *filter = graph->filters[i];
68 unsigned max_src_name = 0, max_dst_name = 0;
69 unsigned max_in_name = 0, max_out_name = 0;
70 unsigned max_in_fmt = 0, max_out_fmt = 0;
71 unsigned width, height, in_indent;
72 unsigned lname = strlen(filter->name);
73 unsigned ltype = strlen(filter->filter->name);
74
75 for (j = 0; j < filter->nb_inputs; j++) {
76 AVFilterLink *l = filter->inputs[j];
77 unsigned ln = strlen(l->src->name) + 1 + strlen(l->srcpad->name);
78 max_src_name = FFMAX(max_src_name, ln);
79 max_in_name = FFMAX(max_in_name, strlen(l->dstpad->name));
80 max_in_fmt = FFMAX(max_in_fmt, print_link_prop(NULL, l));
81 }
82 for (j = 0; j < filter->nb_outputs; j++) {
83 AVFilterLink *l = filter->outputs[j];
84 unsigned ln = strlen(l->dst->name) + 1 + strlen(l->dstpad->name);
85 max_dst_name = FFMAX(max_dst_name, ln);
86 max_out_name = FFMAX(max_out_name, strlen(l->srcpad->name));
87 max_out_fmt = FFMAX(max_out_fmt, print_link_prop(NULL, l));
88 }
89 in_indent = max_src_name + max_in_name + max_in_fmt;
90 in_indent += in_indent ? 4 : 0;
91 width = FFMAX(lname + 2, ltype + 4);
92 height = FFMAX3(2, filter->nb_inputs, filter->nb_outputs);
93 av_bprint_chars(buf, ' ', in_indent);
94 av_bprintf(buf, "+");
95 av_bprint_chars(buf, '-', width);
96 av_bprintf(buf, "+\n");
97 for (j = 0; j < height; j++) {
98 unsigned in_no = j - (height - filter->nb_inputs ) / 2;
99 unsigned out_no = j - (height - filter->nb_outputs) / 2;
100
101 /* Input link */
102 if (in_no < filter->nb_inputs) {
103 AVFilterLink *l = filter->inputs[in_no];
104 e = buf->len + max_src_name + 2;
105 av_bprintf(buf, "%s:%s", l->src->name, l->srcpad->name);
106 av_bprint_chars(buf, '-', e - buf->len);
107 e = buf->len + max_in_fmt + 2 +
108 max_in_name - strlen(l->dstpad->name);
109 print_link_prop(buf, l);
110 av_bprint_chars(buf, '-', e - buf->len);
111 av_bprintf(buf, "%s", l->dstpad->name);
112 } else {
113 av_bprint_chars(buf, ' ', in_indent);
114 }
115
116 /* Filter */
117 av_bprintf(buf, "|");
118 if (j == (height - 2) / 2) {
119 x = (width - lname) / 2;
120 av_bprintf(buf, "%*s%-*s", x, "", width - x, filter->name);
121 } else if (j == (height - 2) / 2 + 1) {
122 x = (width - ltype - 2) / 2;
123 av_bprintf(buf, "%*s(%s)%*s", x, "", filter->filter->name,
124 width - ltype - 2 - x, "");
125 } else {
126 av_bprint_chars(buf, ' ', width);
127 }
128 av_bprintf(buf, "|");
129
130 /* Output link */
131 if (out_no < filter->nb_outputs) {
132 AVFilterLink *l = filter->outputs[out_no];
133 unsigned ln = strlen(l->dst->name) + 1 +
134 strlen(l->dstpad->name);
135 e = buf->len + max_out_name + 2;
136 av_bprintf(buf, "%s", l->srcpad->name);
137 av_bprint_chars(buf, '-', e - buf->len);
138 e = buf->len + max_out_fmt + 2 +
139 max_dst_name - ln;
140 print_link_prop(buf, l);
141 av_bprint_chars(buf, '-', e - buf->len);
142 av_bprintf(buf, "%s:%s", l->dst->name, l->dstpad->name);
143 }
144 av_bprintf(buf, "\n");
145 }
146 av_bprint_chars(buf, ' ', in_indent);
147 av_bprintf(buf, "+");
148 av_bprint_chars(buf, '-', width);
149 av_bprintf(buf, "+\n");
150 av_bprintf(buf, "\n");
151 }
152 }
153
avfilter_graph_dump(AVFilterGraph * graph,const char * options)154 char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
155 {
156 AVBPrint buf;
157 char *dump = NULL;
158
159 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_COUNT_ONLY);
160 avfilter_graph_dump_to_buf(&buf, graph);
161 av_bprint_init(&buf, buf.len + 1, buf.len + 1);
162 avfilter_graph_dump_to_buf(&buf, graph);
163 av_bprint_finalize(&buf, &dump);
164 return dump;
165 }
166