yading@10: /*
yading@10:  * Filter graphs to bad ASCII-art
yading@10:  * Copyright (c) 2012 Nicolas George
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include <string.h>
yading@10: 
yading@10: #include "libavutil/channel_layout.h"
yading@10: #include "libavutil/bprint.h"
yading@10: #include "libavutil/pixdesc.h"
yading@10: #include "avfilter.h"
yading@10: #include "avfiltergraph.h"
yading@10: 
yading@10: static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
yading@10: {
yading@10:     char *format;
yading@10:     char layout[64];
yading@10: 
yading@10:     if (!buf)
yading@10:         buf = &(AVBPrint){ 0 }; /* dummy buffer */
yading@10:     switch (link->type) {
yading@10:         case AVMEDIA_TYPE_VIDEO:
yading@10:             format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
yading@10:             av_bprintf(buf, "[%dx%d %d:%d %s]", link->w, link->h,
yading@10:                     link->sample_aspect_ratio.num,
yading@10:                     link->sample_aspect_ratio.den,
yading@10:                     format);
yading@10:             break;
yading@10: 
yading@10:         case AVMEDIA_TYPE_AUDIO:
yading@10:             av_get_channel_layout_string(layout, sizeof(layout),
yading@10:                                          link->channels, link->channel_layout);
yading@10:             format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
yading@10:             av_bprintf(buf, "[%dHz %s:%s]",
yading@10:                        (int)link->sample_rate, format, layout);
yading@10:             break;
yading@10: 
yading@10:         default:
yading@10:             av_bprintf(buf, "?");
yading@10:             break;
yading@10:     }
yading@10:     return buf->len;
yading@10: }
yading@10: 
yading@10: static void avfilter_graph_dump_to_buf(AVBPrint *buf, AVFilterGraph *graph)
yading@10: {
yading@10:     unsigned i, j, x, e;
yading@10: 
yading@10:     for (i = 0; i < graph->nb_filters; i++) {
yading@10:         AVFilterContext *filter = graph->filters[i];
yading@10:         unsigned max_src_name = 0, max_dst_name = 0;
yading@10:         unsigned max_in_name  = 0, max_out_name = 0;
yading@10:         unsigned max_in_fmt   = 0, max_out_fmt  = 0;
yading@10:         unsigned width, height, in_indent;
yading@10:         unsigned lname = strlen(filter->name);
yading@10:         unsigned ltype = strlen(filter->filter->name);
yading@10: 
yading@10:         for (j = 0; j < filter->input_count; j++) {
yading@10:             AVFilterLink *l = filter->inputs[j];
yading@10:             unsigned ln = strlen(l->src->name) + 1 + strlen(l->srcpad->name);
yading@10:             max_src_name = FFMAX(max_src_name, ln);
yading@10:             max_in_name = FFMAX(max_in_name, strlen(l->dstpad->name));
yading@10:             max_in_fmt = FFMAX(max_in_fmt, print_link_prop(NULL, l));
yading@10:         }
yading@10:         for (j = 0; j < filter->output_count; j++) {
yading@10:             AVFilterLink *l = filter->outputs[j];
yading@10:             unsigned ln = strlen(l->dst->name) + 1 + strlen(l->dstpad->name);
yading@10:             max_dst_name = FFMAX(max_dst_name, ln);
yading@10:             max_out_name = FFMAX(max_out_name, strlen(l->srcpad->name));
yading@10:             max_out_fmt = FFMAX(max_out_fmt, print_link_prop(NULL, l));
yading@10:         }
yading@10:         in_indent = max_src_name + max_in_name + max_in_fmt;
yading@10:         in_indent += in_indent ? 4 : 0;
yading@10:         width = FFMAX(lname + 2, ltype + 4);
yading@10:         height = FFMAX3(2, filter->input_count, filter->output_count);
yading@10:         av_bprint_chars(buf, ' ', in_indent);
yading@10:         av_bprintf(buf, "+");
yading@10:         av_bprint_chars(buf, '-', width);
yading@10:         av_bprintf(buf, "+\n");
yading@10:         for (j = 0; j < height; j++) {
yading@10:             unsigned in_no  = j - (height - filter->input_count ) / 2;
yading@10:             unsigned out_no = j - (height - filter->output_count) / 2;
yading@10: 
yading@10:             /* Input link */
yading@10:             if (in_no < filter->input_count) {
yading@10:                 AVFilterLink *l = filter->inputs[in_no];
yading@10:                 e = buf->len + max_src_name + 2;
yading@10:                 av_bprintf(buf, "%s:%s", l->src->name, l->srcpad->name);
yading@10:                 av_bprint_chars(buf, '-', e - buf->len);
yading@10:                 e = buf->len + max_in_fmt + 2 +
yading@10:                     max_in_name - strlen(l->dstpad->name);
yading@10:                 print_link_prop(buf, l);
yading@10:                 av_bprint_chars(buf, '-', e - buf->len);
yading@10:                 av_bprintf(buf, "%s", l->dstpad->name);
yading@10:             } else {
yading@10:                 av_bprint_chars(buf, ' ', in_indent);
yading@10:             }
yading@10: 
yading@10:             /* Filter */
yading@10:             av_bprintf(buf, "|");
yading@10:             if (j == (height - 2) / 2) {
yading@10:                 x = (width - lname) / 2;
yading@10:                 av_bprintf(buf, "%*s%-*s", x, "", width - x, filter->name);
yading@10:             } else if (j == (height - 2) / 2 + 1) {
yading@10:                 x = (width - ltype - 2) / 2;
yading@10:                 av_bprintf(buf, "%*s(%s)%*s", x, "", filter->filter->name,
yading@10:                         width - ltype - 2 - x, "");
yading@10:             } else {
yading@10:                 av_bprint_chars(buf, ' ', width);
yading@10:             }
yading@10:             av_bprintf(buf, "|");
yading@10: 
yading@10:             /* Output link */
yading@10:             if (out_no < filter->output_count) {
yading@10:                 AVFilterLink *l = filter->outputs[out_no];
yading@10:                 unsigned ln = strlen(l->dst->name) + 1 +
yading@10:                               strlen(l->dstpad->name);
yading@10:                 e = buf->len + max_out_name + 2;
yading@10:                 av_bprintf(buf, "%s", l->srcpad->name);
yading@10:                 av_bprint_chars(buf, '-', e - buf->len);
yading@10:                 e = buf->len + max_out_fmt + 2 +
yading@10:                     max_dst_name - ln;
yading@10:                 print_link_prop(buf, l);
yading@10:                 av_bprint_chars(buf, '-', e - buf->len);
yading@10:                 av_bprintf(buf, "%s:%s", l->dst->name, l->dstpad->name);
yading@10:             }
yading@10:             av_bprintf(buf, "\n");
yading@10:         }
yading@10:         av_bprint_chars(buf, ' ', in_indent);
yading@10:         av_bprintf(buf, "+");
yading@10:         av_bprint_chars(buf, '-', width);
yading@10:         av_bprintf(buf, "+\n");
yading@10:         av_bprintf(buf, "\n");
yading@10:     }
yading@10: }
yading@10: 
yading@10: char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
yading@10: {
yading@10:     AVBPrint buf;
yading@10:     char *dump;
yading@10: 
yading@10:     av_bprint_init(&buf, 0, 0);
yading@10:     avfilter_graph_dump_to_buf(&buf, graph);
yading@10:     av_bprint_init(&buf, buf.len + 1, buf.len + 1);
yading@10:     avfilter_graph_dump_to_buf(&buf, graph);
yading@10:     av_bprint_finalize(&buf, &dump);
yading@10:     return dump;
yading@10: }