| 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 "avfiltergraph.h" |
| 29 | |
| 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 | |
| 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 | |
| 154 | char *avfilter_graph_dump(AVFilterGraph *graph, const char *options) |
| 155 | { |
| 156 | AVBPrint buf; |
| 157 | char *dump; |
| 158 | |
| 159 | av_bprint_init(&buf, 0, 0); |
| 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 | } |