[FFmpeg-devel] [PATCH 1/2] lavfi: add avfilter_graph_dump.
Nicolas George
nicolas.george at normalesup.org
Thu Jan 19 19:46:53 CET 2012
Signed-off-by: Nicolas George <nicolas.george at normalesup.org>
---
doc/APIchanges | 3 +
libavfilter/Makefile | 1 +
libavfilter/avfiltergraph.h | 9 ++
libavfilter/graphdump.c | 171 +++++++++++++++++++++++++++++++++++++++++++
libavfilter/version.h | 4 +-
5 files changed, 186 insertions(+), 2 deletions(-)
create mode 100644 libavfilter/graphdump.c
diff --git a/doc/APIchanges b/doc/APIchanges
index 4dfd6e0..318414f 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -13,6 +13,9 @@ libavutil: 2011-04-18
API changes, most recent first:
+2012-01-19 - xxxxxxx - lavfi 2.60.100
+ Add avfilter_graph_dump.
+
2012-xx-xx - lavc 53.34.0
New audio encoding API:
xxxxxxx Add CODEC_CAP_VARIABLE_FRAME_SIZE capability for use by audio
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index d21d5f4..9c4be6b 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -18,6 +18,7 @@ OBJS = allfilters.o \
defaults.o \
drawutils.o \
formats.o \
+ graphdump.o \
graphparser.o \
transform.o \
vsrc_buffer.o
diff --git a/libavfilter/avfiltergraph.h b/libavfilter/avfiltergraph.h
index 3010362..375ab8e 100644
--- a/libavfilter/avfiltergraph.h
+++ b/libavfilter/avfiltergraph.h
@@ -171,5 +171,14 @@ int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const
int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, int flags, double ts);
+/**
+ * Dump a graph into a human-readable string representation.
+ *
+ * @param graph the graph to dump
+ * @param options formatting options; currently ignored
+ * @return a string, or NULL in case of memory allocation failure;
+ * the string must be freed using av_free
+ */
+char *avfilter_graph_dump(AVFilterGraph *graph, const char *options);
#endif /* AVFILTER_AVFILTERGRAPH_H */
diff --git a/libavfilter/graphdump.c b/libavfilter/graphdump.c
new file mode 100644
index 0000000..8775c1c
--- /dev/null
+++ b/libavfilter/graphdump.c
@@ -0,0 +1,171 @@
+/*
+ * 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/pixdesc.h"
+#include "avfilter.h"
+#include "avfiltergraph.h"
+
+#define BPRINTF(...) \
+ cur += snprintf(cur, buf_end - FFMIN(cur, buf_end), __VA_ARGS__)
+
+#define BPAD(c, l) \
+ do { \
+ if (cur < buf_end) memset(cur, c, FFMIN(l, buf_end - cur)); cur += l; \
+ } while (0)
+
+static int snprint_link_prop(char *buf, char *buf_end, AVFilterLink *link)
+{
+ char *cur = buf, *format;
+ char layout[64];
+
+ switch (link->type) {
+ case AVMEDIA_TYPE_VIDEO:
+ format = av_x_if_null(av_get_pix_fmt_name(link->format), "?");
+ BPRINTF("[%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),
+ -1, link->channel_layout);
+ format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
+ BPRINTF("[%dHz %s:%s:%s]",
+ (int)link->sample_rate, format, layout,
+ link->planar ? "planar" : "packed");
+ break;
+
+ default:
+ BPRINTF("?");
+ break;
+ }
+ return cur - buf;
+}
+
+static size_t avfilter_graph_dump_to_buf(AVFilterGraph *graph,
+ char *buf, char *buf_end)
+{
+ char *cur = buf, *e;
+ unsigned i, j, x;
+
+ for (i = 0; i < graph->filter_count; 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->input_count; 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, snprint_link_prop(NULL, NULL, l));
+ }
+ for (j = 0; j < filter->output_count; 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, snprint_link_prop(NULL, 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->input_count, filter->output_count);
+ BPAD(' ', in_indent);
+ BPRINTF("+");
+ BPAD('-', width);
+ BPRINTF("+\n");
+ for (j = 0; j < height; j++) {
+ unsigned in_no = j - (height - filter->input_count ) / 2;
+ unsigned out_no = j - (height - filter->output_count) / 2;
+
+ /* Input link */
+ if (in_no < filter->input_count) {
+ AVFilterLink *l = filter->inputs[in_no];
+ e = cur + max_src_name + 2;
+ BPRINTF("%s:%s", l->src->name, l->srcpad->name);
+ BPAD('-', e - cur);
+ e = cur + max_in_fmt + 2 +
+ max_in_name - strlen(l->dstpad->name);
+ cur += snprint_link_prop(cur, buf_end, l);
+ BPAD('-', e - cur);
+ BPRINTF("%s", l->dstpad->name);
+ } else {
+ BPAD(' ', in_indent);
+ }
+
+ /* Filter */
+ BPRINTF("|");
+ if (j == (height - 2) / 2) {
+ x = (width - lname) / 2;
+ BPRINTF("%*s%-*s", x, "", width - x, filter->name);
+ } else if (j == (height - 2) / 2 + 1) {
+ x = (width - ltype - 2) / 2;
+ BPRINTF("%*s(%s)%*s", x, "", filter->filter->name,
+ width - ltype - 2 - x, "");
+ } else {
+ BPAD(' ', width);
+ }
+ BPRINTF("|");
+
+ /* Output link */
+ if (out_no < filter->output_count) {
+ AVFilterLink *l = filter->outputs[out_no];
+ unsigned ln = strlen(l->dst->name) + 1 +
+ strlen(l->dstpad->name);
+ e = cur + max_out_name + 2;
+ BPRINTF("%s", l->srcpad->name);
+ BPAD('-', e - cur);
+ e = cur + max_out_fmt + 2 +
+ max_dst_name - ln;
+ cur += snprint_link_prop(cur, buf_end, l);
+ BPAD('-', e - cur);
+ BPRINTF("%s:%s", l->dst->name, l->dstpad->name);
+ }
+ BPRINTF("\n");
+ }
+ BPAD(' ', in_indent);
+ BPRINTF("+");
+ BPAD('-', width);
+ BPRINTF("+\n");
+ BPRINTF("\n");
+ }
+ if (cur < buf_end)
+ *(cur++) = 0;
+ return cur - buf;
+}
+
+char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
+{
+ size_t buf_size = avfilter_graph_dump_to_buf(graph, NULL, NULL);
+ char *buf = av_malloc(buf_size);
+ if (!buf)
+ return NULL;
+ avfilter_graph_dump_to_buf(graph, buf, buf + buf_size);
+ return buf;
+}
diff --git a/libavfilter/version.h b/libavfilter/version.h
index d2af525..60e496d 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,8 +29,8 @@
#include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 2
-#define LIBAVFILTER_VERSION_MINOR 59
-#define LIBAVFILTER_VERSION_MICRO 101
+#define LIBAVFILTER_VERSION_MINOR 60
+#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
--
1.7.8.3
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