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gstreamer/elementgen/gst-xmlinspect.c

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/* GStreamer gst-xmlinspect
* Copyright (C) 2003 Wim Taymans <wtay@chello.be>
* Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <locale.h>
#include <glib/gprintf.h>
#include <gst/gst.h>
#include <gst/base/gstbasesrc.h>
#include <gst/base/gstbasesink.h>
#include <gst/base/gstbasetransform.h>
#include <gst/base/gstpushsrc.h>
#define PUT_START_TAG(pfx,tag) \
G_STMT_START{ \
g_print ("%*.*s<%s>\n", pfx, pfx, "", tag); \
}G_STMT_END
#define PUT_END_TAG(pfx,tag) \
G_STMT_START{ \
g_print ("%*.*s</%s>\n", pfx, pfx, "", tag); \
}G_STMT_END
#define PUT_ESCAPED(pfx,tag,value) \
G_STMT_START{ \
const gchar *toconv = value; \
if (value) { \
gchar *v = g_markup_escape_text (toconv, strlen (toconv)); \
g_print ("%*.*s<%s>%s</%s>\n", pfx, pfx, "", tag, v, tag); \
g_free (v); \
} \
}G_STMT_END
#ifdef G_HAVE_ISO_VARARGS
#define PUT_STRING(pfx, ...) \
G_STMT_START{ \
gchar *ps_val = g_strdup_printf(__VA_ARGS__); \
g_print ("%*.*s%s\n", pfx, pfx, "", ps_val); \
g_free(ps_val); \
}G_STMT_END
#elif defined(G_HAVE_GNUC_VARARGS)
#define PUT_STRING(pfx, str, a...) \
G_STMT_START{ \
g_print ("%*.*s"str"\n", pfx, pfx, "" , ##a); \
}G_STMT_END
#else
static inline void
PUT_STRING (int pfx, const char *format, ...)
{
va_list varargs;
g_print ("%*.*s", pfx, pfx, "");
va_start (varargs, format);
g_vprintf (format, varargs);
va_end (varargs);
g_print ("\n");
}
#endif
static void
print_caps (const GstCaps * caps, gint pfx)
{
char *s;
if (!caps)
return;
s = gst_caps_to_string (caps);
PUT_ESCAPED (pfx, "caps", s);
g_free (s);
}
#if 0
static void
print_formats (const GstFormat * formats, gint pfx)
{
while (formats && *formats) {
const GstFormatDefinition *definition;
definition = gst_format_get_details (*formats);
if (definition)
PUT_STRING (pfx, "<format id=\"%d\" nick=\"%s\">%s</format>",
*formats, definition->nick, definition->description);
else
PUT_STRING (pfx, "<format id=\"%d\">unknown</format>", *formats);
formats++;
}
}
#endif
static void
print_query_types (const GstQueryType * types, gint pfx)
{
while (types && *types) {
const GstQueryTypeDefinition *definition;
definition = gst_query_type_get_details (*types);
if (definition)
PUT_STRING (pfx, "<query-type id=\"%d\" nick=\"%s\">%s</query-type>",
*types, definition->nick, definition->description);
else
PUT_STRING (pfx, "<query-type id=\"%d\">unknown</query-type>", *types);
types++;
}
}
#if 0
static void
print_event_masks (const GstEventMask * masks, gint pfx)
{
GType event_type;
GEnumClass *klass;
GType event_flags;
GFlagsClass *flags_class = NULL;
event_type = gst_event_type_get_type ();
klass = (GEnumClass *) g_type_class_ref (event_type);
while (masks && masks->type) {
GEnumValue *value;
gint flags = 0, index = 0;
switch (masks->type) {
case GST_EVENT_SEEK:
flags = masks->flags;
event_flags = gst_seek_type_get_type ();
flags_class = (GFlagsClass *) g_type_class_ref (event_flags);
break;
default:
break;
}
value = g_enum_get_value (klass, masks->type);
PUT_STRING (pfx, "<event type=\"%s\">", value->value_nick);
while (flags) {
GFlagsValue *value;
if (flags & 1) {
value = g_flags_get_first_value (flags_class, 1 << index);
if (value)
PUT_ESCAPED (pfx + 1, "flag", value->value_nick);
else
PUT_ESCAPED (pfx + 1, "flag", "?");
}
flags >>= 1;
index++;
}
PUT_END_TAG (pfx, "event");
masks++;
}
}
#endif
static void
output_hierarchy (GType type, gint level, gint * maxlevel)
{
GType parent;
parent = g_type_parent (type);
*maxlevel = *maxlevel + 1;
level++;
PUT_STRING (level, "<object name=\"%s\">", g_type_name (type));
if (parent)
output_hierarchy (parent, level, maxlevel);
PUT_END_TAG (level, "object");
}
static void
output_interfaces (GType type)
{
guint n_ifaces;
GType *iface, *ifaces = g_type_interfaces (type, &n_ifaces);
PUT_START_TAG (1, "interfaces");
if (ifaces) {
if (n_ifaces) {
iface = ifaces;
while (*iface) {
PUT_STRING (2, "<interface name=\"%s\" />", g_type_name (*iface));
iface++;
}
}
g_free (ifaces);
}
PUT_END_TAG (1, "interfaces");
}
static void
print_element_properties (GstElement * element, gint pfx)
{
GParamSpec **property_specs;
guint num_properties;
gint i;
property_specs = g_object_class_list_properties
(G_OBJECT_GET_CLASS (element), &num_properties);
PUT_START_TAG (pfx, "element-properties");
for (i = 0; i < num_properties; i++) {
GValue value = { 0, };
GParamSpec *param = property_specs[i];
gboolean readable, writeable;
readable = writeable = FALSE;
g_value_init (&value, param->value_type);
if (param->flags & G_PARAM_READABLE) {
g_object_get_property (G_OBJECT (element), param->name, &value);
readable = TRUE;
}
if (param->flags & G_PARAM_WRITABLE)
writeable = TRUE;
/* Ignore GstObject, GstElement, GstBin, GstPipeline properties */
if (param->owner_type == GST_TYPE_OBJECT ||
param->owner_type == GST_TYPE_ELEMENT ||
param->owner_type == GST_TYPE_BIN ||
param->owner_type == GST_TYPE_PIPELINE ||
param->owner_type == GST_TYPE_BASE_SRC ||
param->owner_type == GST_TYPE_BASE_SINK ||
param->owner_type == GST_TYPE_BASE_TRANSFORM ||
param->owner_type == GST_TYPE_PUSH_SRC)
continue;
PUT_START_TAG (pfx + 1, "element-property");
PUT_ESCAPED (pfx + 2, "name", g_param_spec_get_name (param));
PUT_ESCAPED (pfx + 2, "type", g_type_name (param->value_type));
PUT_ESCAPED (pfx + 2, "nick", g_param_spec_get_nick (param));
PUT_ESCAPED (pfx + 2, "blurb", g_param_spec_get_blurb (param));
if (readable && writeable) {
PUT_ESCAPED (pfx + 2, "flags", "RW");
} else if (readable) {
PUT_ESCAPED (pfx + 2, "flags", "R");
} else if (writeable) {
PUT_ESCAPED (pfx + 2, "flags", "W");
}
switch (G_VALUE_TYPE (&value)) {
case G_TYPE_STRING:
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
case G_TYPE_BOOLEAN:
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
case G_TYPE_ULONG:
{
GParamSpecULong *pulong = G_PARAM_SPEC_ULONG (param);
PUT_STRING (pfx + 2, "<range min=\"%lu\" max=\"%lu\"/>",
pulong->minimum, pulong->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_LONG:
{
GParamSpecLong *plong = G_PARAM_SPEC_LONG (param);
PUT_STRING (pfx + 2, "<range min=\"%ld\" max=\"%ld\"/>",
plong->minimum, plong->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_UINT:
{
GParamSpecUInt *puint = G_PARAM_SPEC_UINT (param);
PUT_STRING (pfx + 2, "<range min=\"%u\" max=\"%u\"/>",
puint->minimum, puint->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_INT:
{
GParamSpecInt *pint = G_PARAM_SPEC_INT (param);
PUT_STRING (pfx + 2, "<range min=\"%d\" max=\"%d\"/>",
pint->minimum, pint->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_UINT64:
{
GParamSpecUInt64 *puint64 = G_PARAM_SPEC_UINT64 (param);
PUT_STRING (pfx + 2,
"<range min=\"%" G_GUINT64_FORMAT "\" max=\"%" G_GUINT64_FORMAT
"\"/>", puint64->minimum, puint64->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_INT64:
{
GParamSpecInt64 *pint64 = G_PARAM_SPEC_INT64 (param);
PUT_STRING (pfx + 2,
"<range min=\"%" G_GINT64_FORMAT "\" max=\"%" G_GINT64_FORMAT
"\"/>", pint64->minimum, pint64->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_FLOAT:
{
GParamSpecFloat *pfloat = G_PARAM_SPEC_FLOAT (param);
PUT_STRING (pfx + 2, "<range min=\"%f\" max=\"%f\"/>",
pfloat->minimum, pfloat->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
case G_TYPE_DOUBLE:
{
GParamSpecDouble *pdouble = G_PARAM_SPEC_DOUBLE (param);
PUT_STRING (pfx + 2, "<range min=\"%g\" max=\"%g\"/>",
pdouble->minimum, pdouble->maximum);
PUT_ESCAPED (pfx + 2, "default", g_strdup_value_contents (&value));
break;
}
default:
if (param->value_type == GST_TYPE_CAPS) {
GstCaps *caps = g_value_peek_pointer (&value);
if (!caps)
PUT_ESCAPED (pfx + 2, "default", "NULL");
else {
print_caps (caps, 2);
}
} else if (G_IS_PARAM_SPEC_ENUM (param)) {
GEnumValue *values;
guint j = 0;
gint enum_value;
values = G_ENUM_CLASS (g_type_class_ref (param->value_type))->values;
enum_value = g_value_get_enum (&value);
while (values[j].value_name) {
if (values[j].value == enum_value)
break;
j++;
}
PUT_STRING (pfx + 2, "<default>%d</default>", values[j].value);
PUT_START_TAG (pfx + 2, "enum-values");
j = 0;
while (values[j].value_name) {
PUT_STRING (pfx + 3, "<value value=\"%d\" nick=\"%s\"/>",
values[j].value, values[j].value_nick);
j++;
}
PUT_END_TAG (pfx + 2, "enum-values");
} else if (G_IS_PARAM_SPEC_FLAGS (param)) {
GFlagsValue *values;
guint j = 0;
gint flags_value;
values = G_FLAGS_CLASS (g_type_class_ref (param->value_type))->values;
flags_value = g_value_get_flags (&value);
PUT_STRING (pfx + 2, "<default>%d</default>", flags_value);
PUT_START_TAG (pfx + 2, "flags-values");
j = 0;
while (values[j].value_name) {
PUT_STRING (pfx + 3, "<flag value=\"%d\" nick=\"%s\"/>",
values[j].value, values[j].value_nick);
j++;
}
PUT_END_TAG (pfx + 2, "flags-values");
} else if (G_IS_PARAM_SPEC_OBJECT (param)) {
PUT_ESCAPED (pfx + 2, "object-type", g_type_name (param->value_type));
}
break;
}
PUT_END_TAG (pfx + 1, "element-property");
}
PUT_END_TAG (pfx, "element-properties");
g_free (property_specs);
}
static void
print_element_signals (GstElement * element, gint pfx)
{
guint *signals;
guint nsignals;
gint i, k;
GSignalQuery *query;
signals = g_signal_list_ids (G_OBJECT_TYPE (element), &nsignals);
for (k = 0; k < 2; k++) {
gint counted = 0;
if (k == 0)
PUT_START_TAG (pfx, "element-signals");
else
PUT_START_TAG (pfx, "element-actions");
for (i = 0; i < nsignals; i++) {
gint n_params;
GType return_type;
const GType *param_types;
gint j;
query = g_new0 (GSignalQuery, 1);
g_signal_query (signals[i], query);
if ((k == 0 && !(query->signal_flags & G_SIGNAL_ACTION)) ||
(k == 1 && (query->signal_flags & G_SIGNAL_ACTION))) {
n_params = query->n_params;
return_type = query->return_type;
param_types = query->param_types;
PUT_START_TAG (pfx + 1, "signal");
PUT_ESCAPED (pfx + 2, "name", query->signal_name);
PUT_ESCAPED (pfx + 2, "return-type", g_type_name (return_type));
PUT_ESCAPED (pfx + 2, "object-type",
g_type_name (G_OBJECT_TYPE (element)));
PUT_START_TAG (pfx + 2, "params");
for (j = 0; j < n_params; j++) {
PUT_ESCAPED (pfx + 3, "type", g_type_name (param_types[j]));
}
PUT_END_TAG (pfx + 2, "params");
PUT_END_TAG (pfx + 1, "signal");
counted++;
}
g_free (query);
}
if (k == 0)
PUT_END_TAG (pfx, "element-signals");
else
PUT_END_TAG (pfx, "element-actions");
}
}
static gint
print_element_info (GstElementFactory * factory)
{
GstElement *element;
GstObjectClass *gstobject_class;
GstElementClass *gstelement_class;
GList *pads;
GstPad *pad;
GstStaticPadTemplate *padtemplate;
gint maxlevel = 0;
element = gst_element_factory_create (factory, "element");
if (!element) {
g_print ("couldn't construct element for some reason\n");
return -1;
}
PUT_START_TAG (0, "element");
PUT_ESCAPED (1, "name", GST_PLUGIN_FEATURE_NAME (factory));
gstobject_class = GST_OBJECT_CLASS (G_OBJECT_GET_CLASS (element));
gstelement_class = GST_ELEMENT_CLASS (G_OBJECT_GET_CLASS (element));
PUT_START_TAG (1, "details");
PUT_ESCAPED (2, "long-name", factory->details.longname);
PUT_ESCAPED (2, "class", factory->details.klass);
PUT_ESCAPED (2, "description", factory->details.description);
PUT_ESCAPED (2, "authors", factory->details.author);
PUT_END_TAG (1, "details");
output_hierarchy (G_OBJECT_TYPE (element), 0, &maxlevel);
output_interfaces (G_OBJECT_TYPE (element));
PUT_START_TAG (1, "pad-templates");
if (factory->numpadtemplates) {
pads = factory->staticpadtemplates;
while (pads) {
padtemplate = (GstStaticPadTemplate *) (pads->data);
pads = g_list_next (pads);
PUT_START_TAG (2, "pad-template");
PUT_ESCAPED (3, "name", padtemplate->name_template);
if (padtemplate->direction == GST_PAD_SRC)
PUT_ESCAPED (3, "direction", "src");
else if (padtemplate->direction == GST_PAD_SINK)
PUT_ESCAPED (3, "direction", "sink");
else
PUT_ESCAPED (3, "direction", "unknown");
if (padtemplate->presence == GST_PAD_ALWAYS)
PUT_ESCAPED (3, "presence", "always");
else if (padtemplate->presence == GST_PAD_SOMETIMES)
PUT_ESCAPED (3, "presence", "sometimes");
else if (padtemplate->presence == GST_PAD_REQUEST) {
PUT_ESCAPED (3, "presence", "request");
PUT_ESCAPED (3, "request-function",
GST_DEBUG_FUNCPTR_NAME (gstelement_class->request_new_pad));
} else
PUT_ESCAPED (3, "presence", "unknown");
if (padtemplate->static_caps.string) {
print_caps (gst_static_caps_get (&padtemplate->static_caps), 3);
}
PUT_END_TAG (2, "pad-template");
}
}
PUT_END_TAG (1, "pad-templates");
PUT_START_TAG (1, "element-flags");
PUT_END_TAG (1, "element-flags");
if (GST_IS_BIN (element)) {
PUT_START_TAG (1, "bin-flags");
PUT_END_TAG (1, "bin-flags");
}
PUT_START_TAG (1, "element-implementation");
PUT_STRING (2, "<state-change function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (gstelement_class->change_state));
#ifndef GST_DISABLE_LOADSAVE
PUT_STRING (2, "<save function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (gstobject_class->save_thyself));
PUT_STRING (2, "<load function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (gstobject_class->restore_thyself));
#endif
PUT_END_TAG (1, "element-implementation");
PUT_START_TAG (1, "clocking-interaction");
if (gst_element_requires_clock (element)) {
PUT_STRING (2, "<requires-clock/>");
}
if (gst_element_provides_clock (element)) {
GstClock *clock;
clock = gst_element_get_clock (element);
if (clock)
PUT_STRING (2, "<provides-clock name=\"%s\"/>", GST_OBJECT_NAME (clock));
}
PUT_END_TAG (1, "clocking-interaction");
if (gst_element_is_indexable (element)) {
PUT_STRING (1, "<indexing-capabilities/>");
}
PUT_START_TAG (1, "pads");
if (element->numpads) {
const GList *pads;
pads = element->pads;
while (pads) {
pad = GST_PAD (pads->data);
pads = g_list_next (pads);
PUT_START_TAG (2, "pad");
PUT_ESCAPED (3, "name", gst_pad_get_name (pad));
if (gst_pad_get_direction (pad) == GST_PAD_SRC)
PUT_ESCAPED (3, "direction", "src");
else if (gst_pad_get_direction (pad) == GST_PAD_SINK)
PUT_ESCAPED (3, "direction", "sink");
else
PUT_ESCAPED (3, "direction", "unknown");
if (pad->padtemplate)
PUT_ESCAPED (3, "template", pad->padtemplate->name_template);
PUT_START_TAG (3, "implementation");
if (pad->chainfunc)
PUT_STRING (4, "<chain-based function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (pad->chainfunc));
if (pad->getrangefunc)
PUT_STRING (4, "<get-range-based function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (pad->getrangefunc));
if (pad->eventfunc != gst_pad_event_default)
PUT_STRING (4, "<event-function function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (pad->eventfunc));
if (pad->queryfunc != gst_pad_query_default)
PUT_STRING (4, "<query-function function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (pad->queryfunc));
if (pad->querytypefunc != gst_pad_get_query_types_default) {
PUT_STRING (4, "<query-type-func function=\"%s\">",
GST_DEBUG_FUNCPTR_NAME (pad->querytypefunc));
print_query_types (gst_pad_get_query_types (pad), 5);
PUT_END_TAG (4, "query-type-func");
}
if (pad->intlinkfunc != gst_pad_get_internal_links_default)
PUT_STRING (4, "<intlink-function function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (pad->intlinkfunc));
if (pad->bufferallocfunc)
PUT_STRING (4, "<bufferalloc-function function=\"%s\"/>",
GST_DEBUG_FUNCPTR_NAME (pad->bufferallocfunc));
PUT_END_TAG (3, "implementation");
if (pad->caps) {
print_caps (pad->caps, 3);
}
PUT_END_TAG (2, "pad");
}
}
PUT_END_TAG (1, "pads");
print_element_properties (element, 1);
print_element_signals (element, 1);
/* for compound elements */
/* FIXME: gst_bin_get_list does not exist anymore
if (GST_IS_BIN (element)) {
GList *children;
GstElement *child;
PUT_START_TAG (1, "children");
children = (GList *) gst_bin_get_list (GST_BIN (element));
while (children) {
child = GST_ELEMENT (children->data);
children = g_list_next (children);
PUT_ESCAPED (2, "child", GST_ELEMENT_NAME (child));
}
PUT_END_TAG (1, "children");
}
*/
PUT_END_TAG (0, "element");
return 0;
}
int
main (int argc, char *argv[])
{
GstElementFactory *factory;
if (argc < 2)
return 0;
setlocale (LC_ALL, "");
if (!g_thread_supported ())
g_thread_init (NULL);
gst_init (NULL, NULL);
factory = gst_element_factory_find (argv[1]);
if (factory) {
print_element_info (factory);
return 0;
}
/* otherwise, error out */
g_printerr ("no such plugin '%s'\n", argv[1]);
return -1;
}
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