diff options
Diffstat (limited to 'libavfilter/graphdump.c')
| -rw-r--r-- | libavfilter/graphdump.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/libavfilter/graphdump.c b/libavfilter/graphdump.c new file mode 100644 index 0000000000..531bb571aa --- /dev/null +++ b/libavfilter/graphdump.c @@ -0,0 +1,166 @@ +/* + * Filter graphs to bad ASCII-art + * Copyright (c) 2012 Nicolas George + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <string.h> + +#include "libavutil/channel_layout.h" +#include "libavutil/bprint.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "avfiltergraph.h" +#include "internal.h" + +static int print_link_prop(AVBPrint *buf, AVFilterLink *link) +{ + char *format; + char layout[64]; + AVBPrint dummy_buffer = { 0 }; + + if (!buf) + buf = &dummy_buffer; + switch (link->type) { + case AVMEDIA_TYPE_VIDEO: + format = av_x_if_null(av_get_pix_fmt_name(link->format), "?"); + av_bprintf(buf, "[%dx%d %d:%d %s]", link->w, link->h, + link->sample_aspect_ratio.num, + link->sample_aspect_ratio.den, + format); + break; + + case AVMEDIA_TYPE_AUDIO: + av_get_channel_layout_string(layout, sizeof(layout), + link->channels, link->channel_layout); + format = av_x_if_null(av_get_sample_fmt_name(link->format), "?"); + av_bprintf(buf, "[%dHz %s:%s]", + (int)link->sample_rate, format, layout); + break; + + default: + av_bprintf(buf, "?"); + break; + } + return buf->len; +} + +static void avfilter_graph_dump_to_buf(AVBPrint *buf, AVFilterGraph *graph) +{ + unsigned i, j, x, e; + + for (i = 0; i < graph->nb_filters; i++) { + AVFilterContext *filter = graph->filters[i]; + unsigned max_src_name = 0, max_dst_name = 0; + unsigned max_in_name = 0, max_out_name = 0; + unsigned max_in_fmt = 0, max_out_fmt = 0; + unsigned width, height, in_indent; + unsigned lname = strlen(filter->name); + unsigned ltype = strlen(filter->filter->name); + + for (j = 0; j < filter->nb_inputs; j++) { + AVFilterLink *l = filter->inputs[j]; + unsigned ln = strlen(l->src->name) + 1 + strlen(l->srcpad->name); + max_src_name = FFMAX(max_src_name, ln); + max_in_name = FFMAX(max_in_name, strlen(l->dstpad->name)); + max_in_fmt = FFMAX(max_in_fmt, print_link_prop(NULL, l)); + } + for (j = 0; j < filter->nb_outputs; j++) { + AVFilterLink *l = filter->outputs[j]; + unsigned ln = strlen(l->dst->name) + 1 + strlen(l->dstpad->name); + max_dst_name = FFMAX(max_dst_name, ln); + max_out_name = FFMAX(max_out_name, strlen(l->srcpad->name)); + max_out_fmt = FFMAX(max_out_fmt, print_link_prop(NULL, l)); + } + in_indent = max_src_name + max_in_name + max_in_fmt; + in_indent += in_indent ? 4 : 0; + width = FFMAX(lname + 2, ltype + 4); + height = FFMAX3(2, filter->nb_inputs, filter->nb_outputs); + av_bprint_chars(buf, ' ', in_indent); + av_bprintf(buf, "+"); + av_bprint_chars(buf, '-', width); + av_bprintf(buf, "+\n"); + for (j = 0; j < height; j++) { + unsigned in_no = j - (height - filter->nb_inputs ) / 2; + unsigned out_no = j - (height - filter->nb_outputs) / 2; + + /* Input link */ + if (in_no < filter->nb_inputs) { + AVFilterLink *l = filter->inputs[in_no]; + e = buf->len + max_src_name + 2; + av_bprintf(buf, "%s:%s", l->src->name, l->srcpad->name); + av_bprint_chars(buf, '-', e - buf->len); + e = buf->len + max_in_fmt + 2 + + max_in_name - strlen(l->dstpad->name); + print_link_prop(buf, l); + av_bprint_chars(buf, '-', e - buf->len); + av_bprintf(buf, "%s", l->dstpad->name); + } else { + av_bprint_chars(buf, ' ', in_indent); + } + + /* Filter */ + av_bprintf(buf, "|"); + if (j == (height - 2) / 2) { + x = (width - lname) / 2; + av_bprintf(buf, "%*s%-*s", x, "", width - x, filter->name); + } else if (j == (height - 2) / 2 + 1) { + x = (width - ltype - 2) / 2; + av_bprintf(buf, "%*s(%s)%*s", x, "", filter->filter->name, + width - ltype - 2 - x, ""); + } else { + av_bprint_chars(buf, ' ', width); + } + av_bprintf(buf, "|"); + + /* Output link */ + if (out_no < filter->nb_outputs) { + AVFilterLink *l = filter->outputs[out_no]; + unsigned ln = strlen(l->dst->name) + 1 + + strlen(l->dstpad->name); + e = buf->len + max_out_name + 2; + av_bprintf(buf, "%s", l->srcpad->name); + av_bprint_chars(buf, '-', e - buf->len); + e = buf->len + max_out_fmt + 2 + + max_dst_name - ln; + print_link_prop(buf, l); + av_bprint_chars(buf, '-', e - buf->len); + av_bprintf(buf, "%s:%s", l->dst->name, l->dstpad->name); + } + av_bprintf(buf, "\n"); + } + av_bprint_chars(buf, ' ', in_indent); + av_bprintf(buf, "+"); + av_bprint_chars(buf, '-', width); + av_bprintf(buf, "+\n"); + av_bprintf(buf, "\n"); + } +} + +char *avfilter_graph_dump(AVFilterGraph *graph, const char *options) +{ + AVBPrint buf; + char *dump; + + av_bprint_init(&buf, 0, 0); + avfilter_graph_dump_to_buf(&buf, graph); + av_bprint_init(&buf, buf.len + 1, buf.len + 1); + avfilter_graph_dump_to_buf(&buf, graph); + av_bprint_finalize(&buf, &dump); + return dump; +} |