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