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gstreamer/gst/gstdebugutils.c
Mathieu Duponchelle 670596abdb docs: standardize debugutils documentation 
* add a SECTION comment

* Misc cleanup / typo fixes / addition of links

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/760>
2021-02-17 18:36:22 +01:00

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/* GStreamer
* Copyright (C) 2007 Stefan Kost <ensonic@users.sf.net>
*
* gstdebugutils.c: debugging and analysis utilities
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/* TODO:
* edge [ constraint=false ];
* this creates strange graphs ("minlen=0" is better)
* try putting src/sink ghostpads for each bin into invisible clusters
*
* for more compact nodes, try
* - changing node-shape from box into record
* - use labels like : element [ label="{element | <src> src | <sink> sink}"]
* - point to record-connectors : element1:src -> element2:sink
* - we use head/tail labels for pad-caps right now
* - this does not work well, as dot seems to not look at their size when
* doing the layout
* - we could add the caps to the pad itself, then we should use one line per
* caps (simple caps = one line)
*/
/**
* SECTION: debugutils
* @title: Debugging utilities
* @short_description: A set of utilities for debugging and development
*
* These utility functions help with generating dot graphs which can
* be rendered with [graphviz] to multiple formats.
*
* [graphviz]: https://graphviz.org/
*/
#include "gst_private.h"
#include "gstdebugutils.h"
#ifndef GST_DISABLE_GST_DEBUG
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "gstinfo.h"
#include "gstbin.h"
#include "gstobject.h"
#include "gstghostpad.h"
#include "gstpad.h"
#include "gstutils.h"
#include "gstvalue.h"
/*** PIPELINE GRAPHS **********************************************************/
extern const gchar *priv_gst_dump_dot_dir; /* NULL *//* set from gst.c */
#define PARAM_MAX_LENGTH 80
static const gchar spaces[] = {
" " /* 32 */
" " /* 64 */
" " /* 96 */
" " /* 128 */
};
#define MAKE_INDENT(indent) \
&spaces[MAX (sizeof (spaces) - (1 + (indent) * 2), 0)]
static gchar *
debug_dump_make_object_name (GstObject * obj)
{
return g_strcanon (g_strdup_printf ("%s_%p", GST_OBJECT_NAME (obj), obj),
G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "_", '_');
}
static gchar *
debug_dump_get_element_state (GstElement * element)
{
gchar *state_name = NULL;
const gchar *state_icons = "~0-=>";
GstState state = GST_STATE_VOID_PENDING, pending = GST_STATE_VOID_PENDING;
gst_element_get_state (element, &state, &pending, 0);
if (pending == GST_STATE_VOID_PENDING) {
gboolean is_locked = gst_element_is_locked_state (element);
state_name = g_strdup_printf ("\\n[%c]%s", state_icons[state],
(is_locked ? "(locked)" : ""));
} else {
state_name = g_strdup_printf ("\\n[%c] -> [%c]", state_icons[state],
state_icons[pending]);
}
return state_name;
}
static gchar *
debug_dump_get_object_params (GObject * object,
GstDebugGraphDetails details, const char *const *ignored_propnames)
{
gchar *param_name = NULL;
GParamSpec **properties, *property;
GValue value = { 0, };
guint i, number_of_properties;
gchar *tmp, *value_str;
const gchar *ellipses;
/* get paramspecs and show non-default properties */
properties =
g_object_class_list_properties (G_OBJECT_GET_CLASS (object),
&number_of_properties);
if (properties) {
for (i = 0; i < number_of_properties; i++) {
gint j;
gboolean ignore = FALSE;
property = properties[i];
/* skip some properties */
if (!(property->flags & G_PARAM_READABLE))
continue;
if (!strcmp (property->name, "name")
|| !strcmp (property->name, "parent"))
continue;
if (ignored_propnames)
for (j = 0; ignored_propnames[j]; j++)
if (!g_strcmp0 (ignored_propnames[j], property->name))
ignore = TRUE;
if (ignore)
continue;
g_value_init (&value, property->value_type);
g_object_get_property (G_OBJECT (object), property->name, &value);
if (!(g_param_value_defaults (property, &value))) {
/* we need to serialise enums and flags ourselves to make sure the
* enum/flag nick is used and not the enum/flag name, which would be the
* C header enum/flag for public enums/flags, but for element-specific
* enums/flags we abuse the name field for the property description,
* and we don't want to print that in the dot file. The nick will
* always work, and it's also shorter. */
if (G_VALUE_HOLDS_ENUM (&value)) {
GEnumClass *e_class = g_type_class_ref (G_VALUE_TYPE (&value));
gint idx, e_val;
tmp = NULL;
e_val = g_value_get_enum (&value);
for (idx = 0; idx < e_class->n_values; ++idx) {
if (e_class->values[idx].value == e_val) {
tmp = g_strdup (e_class->values[idx].value_nick);
break;
}
}
if (tmp == NULL) {
g_value_unset (&value);
continue;
}
} else if (G_VALUE_HOLDS_FLAGS (&value)) {
GFlagsClass *f_class = g_type_class_ref (G_VALUE_TYPE (&value));
GFlagsValue *vals = f_class->values;
GString *s = NULL;
guint idx, flags_left;
s = g_string_new (NULL);
/* we assume the values are sorted from lowest to highest value */
flags_left = g_value_get_flags (&value);
idx = f_class->n_values;
while (idx > 0) {
--idx;
if (vals[idx].value != 0
&& (flags_left & vals[idx].value) == vals[idx].value) {
if (s->len > 0)
g_string_prepend_c (s, '+');
g_string_prepend (s, vals[idx].value_nick);
flags_left -= vals[idx].value;
if (flags_left == 0)
break;
}
}
if (s->len == 0)
g_string_assign (s, "(none)");
tmp = g_string_free (s, FALSE);
} else {
tmp = g_strdup_value_contents (&value);
}
value_str = g_strescape (tmp, NULL);
g_free (tmp);
/* too long, ellipsize */
if (!(details & GST_DEBUG_GRAPH_SHOW_FULL_PARAMS) &&
strlen (value_str) > PARAM_MAX_LENGTH)
ellipses = "…";
else
ellipses = "";
if (param_name)
tmp = param_name;
else
tmp = (char *) "";
if (details & GST_DEBUG_GRAPH_SHOW_FULL_PARAMS) {
param_name = g_strdup_printf ("%s\\n%s=%s", tmp, property->name,
value_str);
} else {
param_name = g_strdup_printf ("%s\\n%s=%."
G_STRINGIFY (PARAM_MAX_LENGTH) "s%s", tmp, property->name,
value_str, ellipses);
}
if (tmp[0] != '\0')
g_free (tmp);
g_free (value_str);
}
g_value_unset (&value);
}
g_free (properties);
}
return param_name;
}
static void
debug_dump_pad (GstPad * pad, const gchar * color_name,
const gchar * element_name, GstDebugGraphDetails details, GString * str,
const gint indent)
{
GstPadTemplate *pad_templ;
GstPadPresence presence;
gchar *pad_name, *param_name = NULL;
const gchar *style_name;
static const char *const ignore_propnames[] = { "direction", "template",
"caps", NULL
};
const gchar *spc = MAKE_INDENT (indent);
pad_name = debug_dump_make_object_name (GST_OBJECT (pad));
/* pad availability */
style_name = "filled,solid";
if ((pad_templ = gst_pad_get_pad_template (pad))) {
presence = GST_PAD_TEMPLATE_PRESENCE (pad_templ);
gst_object_unref (pad_templ);
if (presence == GST_PAD_SOMETIMES) {
style_name = "filled,dotted";
} else if (presence == GST_PAD_REQUEST) {
style_name = "filled,dashed";
}
}
param_name =
debug_dump_get_object_params (G_OBJECT (pad), details, ignore_propnames);
if (details & GST_DEBUG_GRAPH_SHOW_STATES) {
gchar pad_flags[5];
const gchar *activation_mode = "-><";
const gchar *task_mode = "";
GstTask *task;
GST_OBJECT_LOCK (pad);
task = GST_PAD_TASK (pad);
if (task) {
switch (gst_task_get_state (task)) {
case GST_TASK_STARTED:
task_mode = "[T]";
break;
case GST_TASK_PAUSED:
task_mode = "[t]";
break;
default:
/* Invalid task state, ignoring */
break;
}
}
GST_OBJECT_UNLOCK (pad);
/* check if pad flags */
pad_flags[0] =
GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_BLOCKED) ? 'B' : 'b';
pad_flags[1] =
GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_FLUSHING) ? 'F' : 'f';
pad_flags[2] =
GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_BLOCKING) ? 'B' : 'b';
pad_flags[3] = GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_EOS) ? 'E' : '\0';
pad_flags[4] = '\0';
g_string_append_printf (str,
"%s %s_%s [color=black, fillcolor=\"%s\", label=\"%s%s\\n[%c][%s]%s\", height=\"0.2\", style=\"%s\"];\n",
spc, element_name, pad_name, color_name, GST_OBJECT_NAME (pad),
(param_name ? param_name : ""),
activation_mode[pad->mode], pad_flags, task_mode, style_name);
} else {
g_string_append_printf (str,
"%s %s_%s [color=black, fillcolor=\"%s\", label=\"%s%s\", height=\"0.2\", style=\"%s\"];\n",
spc, element_name, pad_name, color_name, GST_OBJECT_NAME (pad),
(param_name ? param_name : ""), style_name);
}
g_free (param_name);
g_free (pad_name);
}
static void
debug_dump_element_pad (GstPad * pad, GstElement * element,
GstDebugGraphDetails details, GString * str, const gint indent)
{
GstElement *target_element;
GstPad *target_pad, *tmp_pad;
GstPadDirection dir;
gchar *element_name;
gchar *target_element_name;
const gchar *color_name;
dir = gst_pad_get_direction (pad);
element_name = debug_dump_make_object_name (GST_OBJECT (element));
if (GST_IS_GHOST_PAD (pad)) {
color_name =
(dir == GST_PAD_SRC) ? "#ffdddd" : ((dir ==
GST_PAD_SINK) ? "#ddddff" : "#ffffff");
/* output target-pad so that it belongs to this element */
if ((tmp_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (pad)))) {
if ((target_pad = gst_pad_get_peer (tmp_pad))) {
gchar *pad_name, *target_pad_name;
const gchar *spc = MAKE_INDENT (indent);
if ((target_element = gst_pad_get_parent_element (target_pad))) {
target_element_name =
debug_dump_make_object_name (GST_OBJECT (target_element));
} else {
target_element_name = g_strdup ("");
}
debug_dump_pad (target_pad, color_name, target_element_name, details,
str, indent);
/* src ghostpad relationship */
pad_name = debug_dump_make_object_name (GST_OBJECT (pad));
target_pad_name = debug_dump_make_object_name (GST_OBJECT (target_pad));
if (dir == GST_PAD_SRC) {
g_string_append_printf (str,
"%s%s_%s -> %s_%s [style=dashed, minlen=0]\n", spc,
target_element_name, target_pad_name, element_name, pad_name);
} else {
g_string_append_printf (str,
"%s%s_%s -> %s_%s [style=dashed, minlen=0]\n", spc,
element_name, pad_name, target_element_name, target_pad_name);
}
g_free (target_pad_name);
g_free (target_element_name);
if (target_element)
gst_object_unref (target_element);
gst_object_unref (target_pad);
g_free (pad_name);
}
gst_object_unref (tmp_pad);
}
} else {
color_name =
(dir == GST_PAD_SRC) ? "#ffaaaa" : ((dir ==
GST_PAD_SINK) ? "#aaaaff" : "#cccccc");
}
/* pads */
debug_dump_pad (pad, color_name, element_name, details, str, indent);
g_free (element_name);
}
static gboolean
string_append_field (GQuark field, const GValue * value, gpointer ptr)
{
GString *str = (GString *) ptr;
gchar *value_str = gst_value_serialize (value);
gchar *esc_value_str;
if (value_str == NULL) {
g_string_append_printf (str, " %18s: NULL\\l", g_quark_to_string (field));
return TRUE;
}
/* some enums can become really long */
if (strlen (value_str) > 25) {
gint pos = 24;
/* truncate */
value_str[25] = '\0';
/* mirror any brackets and quotes */
if (value_str[0] == '<')
value_str[pos--] = '>';
if (value_str[0] == '[')
value_str[pos--] = ']';
if (value_str[0] == '(')
value_str[pos--] = ')';
if (value_str[0] == '{')
value_str[pos--] = '}';
if (value_str[0] == '"')
value_str[pos--] = '"';
if (pos != 24)
value_str[pos--] = ' ';
/* elippsize */
value_str[pos--] = '.';
value_str[pos--] = '.';
value_str[pos--] = '.';
}
esc_value_str = g_strescape (value_str, NULL);
g_string_append_printf (str, " %18s: %s\\l", g_quark_to_string (field),
esc_value_str);
g_free (value_str);
g_free (esc_value_str);
return TRUE;
}
static gchar *
debug_dump_describe_caps (GstCaps * caps, GstDebugGraphDetails details)
{
gchar *media = NULL;
if (details & GST_DEBUG_GRAPH_SHOW_CAPS_DETAILS) {
if (gst_caps_is_any (caps) || gst_caps_is_empty (caps)) {
media = gst_caps_to_string (caps);
} else {
GString *str = NULL;
guint i;
guint slen = 0;
for (i = 0; i < gst_caps_get_size (caps); i++) {
slen += 25 +
STRUCTURE_ESTIMATED_STRING_LEN (gst_caps_get_structure (caps, i));
}
str = g_string_sized_new (slen);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstCapsFeatures *features = __gst_caps_get_features_unchecked (caps, i);
GstStructure *structure = gst_caps_get_structure (caps, i);
g_string_append (str, gst_structure_get_name (structure));
if (features && (gst_caps_features_is_any (features)
|| !gst_caps_features_is_equal (features,
GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))) {
g_string_append_c (str, '(');
priv_gst_caps_features_append_to_gstring (features, str);
g_string_append_c (str, ')');
}
g_string_append (str, "\\l");
gst_structure_foreach (structure, string_append_field, (gpointer) str);
}
media = g_string_free (str, FALSE);
}
} else {
if (GST_CAPS_IS_SIMPLE (caps))
media =
g_strdup (gst_structure_get_name (gst_caps_get_structure (caps, 0)));
else
media = g_strdup ("*");
}
return media;
}
static void
debug_dump_element_pad_link (GstPad * pad, GstElement * element,
GstDebugGraphDetails details, GString * str, const gint indent)
{
GstElement *peer_element;
GstPad *peer_pad;
GstCaps *caps, *peer_caps;
gchar *media = NULL;
gchar *media_src = NULL, *media_sink = NULL;
gchar *pad_name, *element_name;
gchar *peer_pad_name, *peer_element_name;
const gchar *spc = MAKE_INDENT (indent);
if ((peer_pad = gst_pad_get_peer (pad))) {
if ((details & GST_DEBUG_GRAPH_SHOW_MEDIA_TYPE) ||
(details & GST_DEBUG_GRAPH_SHOW_CAPS_DETAILS)
) {
caps = gst_pad_get_current_caps (pad);
if (!caps)
caps = gst_pad_get_pad_template_caps (pad);
peer_caps = gst_pad_get_current_caps (peer_pad);
if (!peer_caps)
peer_caps = gst_pad_get_pad_template_caps (peer_pad);
media = debug_dump_describe_caps (caps, details);
/* check if peer caps are different */
if (peer_caps && !gst_caps_is_equal (caps, peer_caps)) {
gchar *tmp;
tmp = debug_dump_describe_caps (peer_caps, details);
if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
media_src = media;
media_sink = tmp;
} else {
media_src = tmp;
media_sink = media;
}
media = NULL;
}
gst_caps_unref (peer_caps);
gst_caps_unref (caps);
}
pad_name = debug_dump_make_object_name (GST_OBJECT (pad));
if (element) {
element_name = debug_dump_make_object_name (GST_OBJECT (element));
} else {
element_name = g_strdup ("");
}
peer_pad_name = debug_dump_make_object_name (GST_OBJECT (peer_pad));
if ((peer_element = gst_pad_get_parent_element (peer_pad))) {
peer_element_name =
debug_dump_make_object_name (GST_OBJECT (peer_element));
} else {
peer_element_name = g_strdup ("");
}
/* pad link */
if (media) {
g_string_append_printf (str, "%s%s_%s -> %s_%s [label=\"%s\"]\n", spc,
element_name, pad_name, peer_element_name, peer_pad_name, media);
g_free (media);
} else if (media_src && media_sink) {
/* dot has some issues with placement of head and taillabels,
* we need an empty label to make space */
g_string_append_printf (str,
"%s%s_%s -> %s_%s [labeldistance=\"10\", labelangle=\"0\", "
"label=\" \", "
"taillabel=\"%s\", headlabel=\"%s\"]\n",
spc, element_name, pad_name, peer_element_name, peer_pad_name,
media_src, media_sink);
g_free (media_src);
g_free (media_sink);
} else {
g_string_append_printf (str, "%s%s_%s -> %s_%s\n", spc,
element_name, pad_name, peer_element_name, peer_pad_name);
}
g_free (pad_name);
g_free (element_name);
g_free (peer_pad_name);
g_free (peer_element_name);
if (peer_element)
gst_object_unref (peer_element);
gst_object_unref (peer_pad);
}
}
static void
debug_dump_element_pads (GstIterator * pad_iter, GstPad * pad,
GstElement * element, GstDebugGraphDetails details, GString * str,
const gint indent, guint * num_pads, gchar * cluster_name,
gchar ** first_pad_name)
{
GValue item = { 0, };
gboolean pads_done;
const gchar *spc = MAKE_INDENT (indent);
pads_done = FALSE;
while (!pads_done) {
switch (gst_iterator_next (pad_iter, &item)) {
case GST_ITERATOR_OK:
pad = g_value_get_object (&item);
if (!*num_pads) {
g_string_append_printf (str, "%ssubgraph cluster_%s {\n", spc,
cluster_name);
g_string_append_printf (str, "%s label=\"\";\n", spc);
g_string_append_printf (str, "%s style=\"invis\";\n", spc);
(*first_pad_name) = debug_dump_make_object_name (GST_OBJECT (pad));
}
debug_dump_element_pad (pad, element, details, str, indent);
(*num_pads)++;
g_value_reset (&item);
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (pad_iter);
break;
case GST_ITERATOR_ERROR:
case GST_ITERATOR_DONE:
pads_done = TRUE;
break;
}
}
if (*num_pads) {
g_string_append_printf (str, "%s}\n\n", spc);
}
}
/*
* debug_dump_element:
* @bin: the bin that should be analyzed
* @out: file to write to
* @indent: level of graph indentation
*
* Helper for gst_debug_bin_to_dot_file() to recursively dump a pipeline.
*/
static void
debug_dump_element (GstBin * bin, GstDebugGraphDetails details,
GString * str, const gint indent)
{
GstIterator *element_iter, *pad_iter;
gboolean elements_done, pads_done;
GValue item = { 0, };
GValue item2 = { 0, };
GstElement *element;
GstPad *pad = NULL;
guint src_pads, sink_pads;
gchar *src_pad_name = NULL, *sink_pad_name = NULL;
gchar *element_name;
gchar *state_name = NULL;
gchar *param_name = NULL;
const gchar *spc = MAKE_INDENT (indent);
static const char *const ignore_propnames[] = { "stats", NULL };
element_iter = gst_bin_iterate_elements (bin);
elements_done = FALSE;
while (!elements_done) {
switch (gst_iterator_next (element_iter, &item)) {
case GST_ITERATOR_OK:
element = g_value_get_object (&item);
element_name = debug_dump_make_object_name (GST_OBJECT (element));
if (details & GST_DEBUG_GRAPH_SHOW_STATES) {
state_name = debug_dump_get_element_state (GST_ELEMENT (element));
}
if (details & GST_DEBUG_GRAPH_SHOW_NON_DEFAULT_PARAMS) {
param_name = debug_dump_get_object_params (G_OBJECT (element),
details, ignore_propnames);
}
/* elements */
g_string_append_printf (str, "%ssubgraph cluster_%s {\n", spc,
element_name);
g_string_append_printf (str, "%s fontname=\"Bitstream Vera Sans\";\n",
spc);
g_string_append_printf (str, "%s fontsize=\"8\";\n", spc);
g_string_append_printf (str, "%s style=\"filled,rounded\";\n", spc);
g_string_append_printf (str, "%s color=black;\n", spc);
g_string_append_printf (str, "%s label=\"%s\\n%s%s%s\";\n", spc,
G_OBJECT_TYPE_NAME (element), GST_OBJECT_NAME (element),
(state_name ? state_name : ""), (param_name ? param_name : "")
);
if (state_name) {
g_free (state_name);
state_name = NULL;
}
if (param_name) {
g_free (param_name);
param_name = NULL;
}
src_pads = sink_pads = 0;
if ((pad_iter = gst_element_iterate_sink_pads (element))) {
gchar *cluster_name = g_strdup_printf ("%s_sink", element_name);
debug_dump_element_pads (pad_iter, pad, element, details, str,
indent + 1, &sink_pads, cluster_name, &sink_pad_name);
g_free (cluster_name);
gst_iterator_free (pad_iter);
}
if ((pad_iter = gst_element_iterate_src_pads (element))) {
gchar *cluster_name = g_strdup_printf ("%s_src", element_name);
debug_dump_element_pads (pad_iter, pad, element, details, str,
indent + 1, &src_pads, cluster_name, &src_pad_name);
g_free (cluster_name);
gst_iterator_free (pad_iter);
}
if (sink_pads && src_pads) {
/* add invisible link from first sink to first src pad */
g_string_append_printf (str,
"%s %s_%s -> %s_%s [style=\"invis\"];\n",
spc, element_name, sink_pad_name, element_name, src_pad_name);
}
g_free (sink_pad_name);
g_free (src_pad_name);
g_free (element_name);
sink_pad_name = src_pad_name = NULL;
if (GST_IS_BIN (element)) {
g_string_append_printf (str, "%s fillcolor=\"#ffffff\";\n", spc);
/* recurse */
debug_dump_element (GST_BIN (element), details, str, indent + 1);
} else {
if (src_pads && !sink_pads)
g_string_append_printf (str, "%s fillcolor=\"#ffaaaa\";\n", spc);
else if (!src_pads && sink_pads)
g_string_append_printf (str, "%s fillcolor=\"#aaaaff\";\n", spc);
else if (src_pads && sink_pads)
g_string_append_printf (str, "%s fillcolor=\"#aaffaa\";\n", spc);
else
g_string_append_printf (str, "%s fillcolor=\"#ffffff\";\n", spc);
}
g_string_append_printf (str, "%s}\n\n", spc);
if ((pad_iter = gst_element_iterate_pads (element))) {
pads_done = FALSE;
while (!pads_done) {
switch (gst_iterator_next (pad_iter, &item2)) {
case GST_ITERATOR_OK:
pad = g_value_get_object (&item2);
if (gst_pad_is_linked (pad)) {
if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
debug_dump_element_pad_link (pad, element, details, str,
indent);
} else {
GstPad *peer_pad = gst_pad_get_peer (pad);
if (peer_pad) {
if (!GST_IS_GHOST_PAD (peer_pad)
&& GST_IS_PROXY_PAD (peer_pad)) {
debug_dump_element_pad_link (peer_pad, NULL, details,
str, indent);
}
gst_object_unref (peer_pad);
}
}
}
g_value_reset (&item2);
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (pad_iter);
break;
case GST_ITERATOR_ERROR:
case GST_ITERATOR_DONE:
pads_done = TRUE;
break;
}
}
g_value_unset (&item2);
gst_iterator_free (pad_iter);
}
g_value_reset (&item);
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (element_iter);
break;
case GST_ITERATOR_ERROR:
case GST_ITERATOR_DONE:
elements_done = TRUE;
break;
}
}
g_value_unset (&item);
gst_iterator_free (element_iter);
}
static void
debug_dump_header (GstBin * bin, GstDebugGraphDetails details, GString * str)
{
gchar *state_name = NULL;
gchar *param_name = NULL;
if (details & GST_DEBUG_GRAPH_SHOW_STATES) {
state_name = debug_dump_get_element_state (GST_ELEMENT (bin));
}
if (details & GST_DEBUG_GRAPH_SHOW_NON_DEFAULT_PARAMS) {
param_name = debug_dump_get_object_params (G_OBJECT (bin), details, NULL);
}
/* write header */
g_string_append_printf (str,
"digraph pipeline {\n"
" rankdir=LR;\n"
" fontname=\"sans\";\n"
" fontsize=\"10\";\n"
" labelloc=t;\n"
" nodesep=.1;\n"
" ranksep=.2;\n"
" label=\"<%s>\\n%s%s%s\";\n"
" node [style=\"filled,rounded\", shape=box, fontsize=\"9\", fontname=\"sans\", margin=\"0.0,0.0\"];\n"
" edge [labelfontsize=\"6\", fontsize=\"9\", fontname=\"monospace\"];\n"
" \n"
" legend [\n"
" pos=\"0,0!\",\n"
" margin=\"0.05,0.05\",\n"
" style=\"filled\",\n"
" label=\"Legend\\lElement-States: [~] void-pending, [0] null, [-] ready, [=] paused, [>] playing\\lPad-Activation: [-] none, [>] push, [<] pull\\lPad-Flags: [b]locked, [f]lushing, [b]locking, [E]OS; upper-case is set\\lPad-Task: [T] has started task, [t] has paused task\\l\",\n"
" ];"
"\n", G_OBJECT_TYPE_NAME (bin), GST_OBJECT_NAME (bin),
(state_name ? state_name : ""), (param_name ? param_name : "")
);
if (state_name)
g_free (state_name);
if (param_name)
g_free (param_name);
}
static void
debug_dump_footer (GString * str)
{
g_string_append_printf (str, "}\n");
}
/**
* gst_debug_bin_to_dot_data:
* @bin: the top-level pipeline that should be analyzed
* @details: type of #GstDebugGraphDetails to use
*
* To aid debugging applications one can use this method to obtain the whole
* network of gstreamer elements that form the pipeline into a dot file.
* This data can be processed with graphviz to get an image.
*
* Returns: (transfer full): a string containing the pipeline in graphviz
* dot format.
*/
gchar *
gst_debug_bin_to_dot_data (GstBin * bin, GstDebugGraphDetails details)
{
GString *str;
g_return_val_if_fail (GST_IS_BIN (bin), NULL);
str = g_string_new (NULL);
debug_dump_header (bin, details, str);
debug_dump_element (bin, details, str, 1);
debug_dump_footer (str);
return g_string_free (str, FALSE);
}
/**
* gst_debug_bin_to_dot_file:
* @bin: the top-level pipeline that should be analyzed
* @details: type of #GstDebugGraphDetails to use
* @file_name: (type filename): output base filename (e.g. "myplayer")
*
* To aid debugging applications one can use this method to write out the whole
* network of gstreamer elements that form the pipeline into a dot file.
* This file can be processed with graphviz to get an image.
*
* ``` shell
* dot -Tpng -oimage.png graph_lowlevel.dot
* ```
*/
void
gst_debug_bin_to_dot_file (GstBin * bin, GstDebugGraphDetails details,
const gchar * file_name)
{
gchar *full_file_name = NULL;
FILE *out;
g_return_if_fail (GST_IS_BIN (bin));
if (G_LIKELY (priv_gst_dump_dot_dir == NULL))
return;
if (!file_name) {
file_name = g_get_application_name ();
if (!file_name)
file_name = "unnamed";
}
full_file_name = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "%s.dot",
priv_gst_dump_dot_dir, file_name);
if ((out = fopen (full_file_name, "wb"))) {
gchar *buf;
buf = gst_debug_bin_to_dot_data (bin, details);
fputs (buf, out);
g_free (buf);
fclose (out);
GST_INFO ("wrote bin graph to : '%s'", full_file_name);
} else {
GST_WARNING ("Failed to open file '%s' for writing: %s", full_file_name,
g_strerror (errno));
}
g_free (full_file_name);
}
/**
* gst_debug_bin_to_dot_file_with_ts:
* @bin: the top-level pipeline that should be analyzed
* @details: type of #GstDebugGraphDetails to use
* @file_name: (type filename): output base filename (e.g. "myplayer")
*
* This works like gst_debug_bin_to_dot_file(), but adds the current timestamp
* to the filename, so that it can be used to take multiple snapshots.
*/
void
gst_debug_bin_to_dot_file_with_ts (GstBin * bin,
GstDebugGraphDetails details, const gchar * file_name)
{
gchar *ts_file_name = NULL;
GstClockTime elapsed;
g_return_if_fail (GST_IS_BIN (bin));
if (!file_name) {
file_name = g_get_application_name ();
if (!file_name)
file_name = "unnamed";
}
/* add timestamp */
elapsed = GST_CLOCK_DIFF (_priv_gst_start_time, gst_util_get_timestamp ());
/* we don't use GST_TIME_FORMAT as such filenames would fail on some
* filesystems like fat */
ts_file_name =
g_strdup_printf ("%u.%02u.%02u.%09u-%s", GST_TIME_ARGS (elapsed),
file_name);
gst_debug_bin_to_dot_file (bin, details, ts_file_name);
g_free (ts_file_name);
}
#else /* !GST_DISABLE_GST_DEBUG */
#ifndef GST_REMOVE_DISABLED
void
gst_debug_bin_to_dot_file (GstBin * bin, GstDebugGraphDetails details,
const gchar * file_name)
{
}
void
gst_debug_bin_to_dot_file_with_ts (GstBin * bin, GstDebugGraphDetails details,
const gchar * file_name)
{
}
#endif /* GST_REMOVE_DISABLED */
#endif /* GST_DISABLE_GST_DEBUG */
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