gstreamer/tools/gst-xmlinspect.c

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include <gst/gst.h>
#include <gst/control/control.h>
#include <string.h>
#include <locale.h>
#include <glib/gprintf.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);
}

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++;
  }
}

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++;
  }
}

static void
print_event_masks (const GstEventMask * masks, gint pfx)
{
#ifndef GST_DISABLE_ENUMTYPES
  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
print_element_properties (GstElement * element, gint pfx)
{
  GParamSpec **property_specs;
  gint num_properties, i;
  gboolean readable;

  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];

    readable = 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;
    }
    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) {
      PUT_ESCAPED (pfx + 2, "flags", "RW");
    } else {
      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");
          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");
        } 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");
}

static void
print_element_dynparamaters (GstElement * element, gint pfx)
{
  GstDParamManager *dpman;
  GParamSpec **specs;
  gint x;

  PUT_START_TAG (pfx, "dyn-params");

  if ((dpman = gst_dpman_get_manager (element))) {
    specs = gst_dpman_list_dparam_specs (dpman);
    for (x = 0; specs[x] != NULL; x++) {
      PUT_START_TAG (pfx + 1, "dyn-param");

      PUT_ESCAPED (pfx + 2, "name", g_param_spec_get_name (specs[x]));
      PUT_ESCAPED (pfx + 2, "type", g_type_name (specs[x]->value_type));
      PUT_ESCAPED (pfx + 2, "nick", g_param_spec_get_nick (specs[x]));
      PUT_ESCAPED (pfx + 2, "blurb", g_param_spec_get_blurb (specs[x]));

      switch (G_PARAM_SPEC_VALUE_TYPE (specs[x])) {
        case G_TYPE_INT64:
          PUT_STRING (pfx + 2,
              "<range min=\"%" G_GINT64_FORMAT "\" max=\"%" G_GINT64_FORMAT
              "\"/>", ((GParamSpecInt64 *) specs[x])->minimum,
              ((GParamSpecInt64 *) specs[x])->maximum);
          PUT_STRING (pfx + 2, "<default>%" G_GINT64_FORMAT "</default>",
              ((GParamSpecInt64 *) specs[x])->default_value);
          break;
        case G_TYPE_INT:
          PUT_STRING (pfx + 2, "<range min=\"%d\" max=\"%d\"/>",
              ((GParamSpecInt *) specs[x])->minimum,
              ((GParamSpecInt *) specs[x])->maximum);
          PUT_STRING (pfx + 2, "<default>%d</default>",
              ((GParamSpecInt *) specs[x])->default_value);
          break;
        case G_TYPE_FLOAT:
          PUT_STRING (pfx + 2, "<range min=\"%f\" max=\"%f\"/>",
              ((GParamSpecFloat *) specs[x])->minimum,
              ((GParamSpecFloat *) specs[x])->maximum);
          PUT_STRING (pfx + 2, "<default>%f</default>",
              ((GParamSpecFloat *) specs[x])->default_value);
          break;
        default:
          break;
      }
      PUT_END_TAG (pfx + 1, "dyn-param");
    }
    g_free (specs);
  }
  PUT_END_TAG (pfx, "dyn-params");
}

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;
  GstRealPad *realpad;
  GstPadTemplate *padtemplate;
  GList *children;
  GstElement *child;
  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);

  PUT_START_TAG (1, "pad-templates");
  if (factory->numpadtemplates) {
    pads = factory->padtemplates;
    while (pads) {
      padtemplate = (GstPadTemplate *) (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->caps) {
        print_caps (padtemplate->caps, 3);
      }
      PUT_END_TAG (2, "pad-template");
    }
  }
  PUT_END_TAG (1, "pad-templates");

  PUT_START_TAG (1, "element-flags");
  if (GST_FLAG_IS_SET (element, GST_ELEMENT_DECOUPLED)) {
    PUT_ESCAPED (2, "flag", "GST_ELEMENT_DECOUPLED");
  }
  if (GST_FLAG_IS_SET (element, GST_ELEMENT_EVENT_AWARE)) {
    PUT_ESCAPED (2, "flag", "GST_ELEMENT_EVENT_AWARE");
  }
  PUT_END_TAG (1, "element-flags");

  if (GST_IS_BIN (element)) {
    PUT_START_TAG (1, "bin-flags");

    if (GST_FLAG_IS_SET (element, GST_BIN_FLAG_MANAGER)) {
      PUT_ESCAPED (2, "flag", "GST_BIN_FLAG_MANAGER");
    }
    if (GST_FLAG_IS_SET (element, GST_BIN_SELF_SCHEDULABLE)) {
      PUT_ESCAPED (2, "flag", "GST_BIN_SELF_SCHEDULABLE");
    }
    PUT_END_TAG (1, "bin-flags");
  }


  PUT_START_TAG (1, "element-implementation");
  if (element->loopfunc)
    PUT_STRING (2, "<loop-based function=\"%s\"/>",
        GST_DEBUG_FUNCPTR_NAME (element->loopfunc));

  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");

#ifndef GST_DISABLE_INDEX
  if (gst_element_is_indexable (element)) {
    PUT_STRING (1, "<indexing-capabilities/>");
  }
#endif

  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);
      realpad = GST_PAD_REALIZE (pad);

      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 (GST_IS_GHOST_PAD (pad))
        PUT_ESCAPED (3, "ghost", gst_pad_get_name (pad));

      if (pad->padtemplate)
        PUT_ESCAPED (3, "template", pad->padtemplate->name_template);

      PUT_START_TAG (3, "implementation");
      if (realpad->chainfunc)
        PUT_STRING (4, "<chain-based function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->chainfunc));
      if (realpad->getfunc)
        PUT_STRING (4, "<get-based function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->getfunc));
      if (realpad->formatsfunc != gst_pad_get_formats_default) {
        PUT_STRING (4, "<formats-function function=\"%s\">",
            GST_DEBUG_FUNCPTR_NAME (realpad->formatsfunc));
        print_formats (gst_pad_get_formats (GST_PAD (realpad)), 5);
        PUT_END_TAG (4, "formats-function");
      }
      if (realpad->convertfunc != gst_pad_convert_default)
        PUT_STRING (4, "<convert-function function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->convertfunc));
      if (realpad->eventfunc != gst_pad_event_default)
        PUT_STRING (4, "<event-function function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->eventfunc));
      if (realpad->eventmaskfunc != gst_pad_get_event_masks_default) {
        PUT_STRING (4, "<event-mask-func function=\"%s\">",
            GST_DEBUG_FUNCPTR_NAME (realpad->eventmaskfunc));
        print_event_masks (gst_pad_get_event_masks (GST_PAD (realpad)), 5);
        PUT_END_TAG (4, "event-mask-func");
      }
      if (realpad->queryfunc != gst_pad_query_default)
        PUT_STRING (4, "<query-function function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->queryfunc));
      if (realpad->querytypefunc != gst_pad_get_query_types_default) {
        PUT_STRING (4, "<query-type-func function=\"%s\">",
            GST_DEBUG_FUNCPTR_NAME (realpad->querytypefunc));
        print_query_types (gst_pad_get_query_types (GST_PAD (realpad)), 5);
        PUT_END_TAG (4, "query-type-func");
      }

      if (realpad->intlinkfunc != gst_pad_get_internal_links_default)
        PUT_STRING (4, "<intlink-function function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->intlinkfunc));

      if (realpad->bufferallocfunc)
        PUT_STRING (4, "<bufferalloc-function function=\"%s\"/>",
            GST_DEBUG_FUNCPTR_NAME (realpad->bufferallocfunc));
      PUT_END_TAG (3, "implementation");

      if (realpad->caps) {
        print_caps (realpad->caps, 3);
      }
      PUT_END_TAG (2, "pad");
    }
  }
  PUT_END_TAG (1, "pads");

  print_element_properties (element, 1);
  print_element_dynparamaters (element, 1);
  print_element_signals (element, 1);

  /* for compound elements */
  if (GST_IS_BIN (element)) {
    PUT_START_TAG (1, "children");
    children = (GList *) GST_BIN (element)->children;
    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;
}

static void
print_element_list (void)
{
  GList *plugins;

  plugins = gst_registry_pool_plugin_list ();
  while (plugins) {
    GList *features;
    GstPlugin *plugin;

    plugin = (GstPlugin *) (plugins->data);
    plugins = g_list_next (plugins);

    features = gst_plugin_get_feature_list (plugin);
    while (features) {
      GstPluginFeature *feature;

      feature = GST_PLUGIN_FEATURE (features->data);

      if (GST_IS_ELEMENT_FACTORY (feature)) {
        GstElementFactory *factory;

        factory = GST_ELEMENT_FACTORY (feature);
        g_print ("%s:  %s: %s\n", plugin->desc.name,
            GST_PLUGIN_FEATURE_NAME (factory), factory->details.longname);
      }
#ifndef GST_DISABLE_INDEX
      else if (GST_IS_INDEX_FACTORY (feature)) {
        GstIndexFactory *factory;

        factory = GST_INDEX_FACTORY (feature);
        g_print ("%s:  %s: %s\n", plugin->desc.name,
            GST_PLUGIN_FEATURE_NAME (factory), factory->longdesc);
      }
#endif
      else if (GST_IS_TYPE_FIND_FACTORY (feature)) {
        GstTypeFindFactory *factory;

        factory = GST_TYPE_FIND_FACTORY (feature);
        if (factory->extensions) {
          guint i = 0;

          g_print ("%s type: ", plugin->desc.name);
          while (factory->extensions[i]) {
            g_print ("%s%s", i > 0 ? ", " : "", factory->extensions[i]);
            i++;
          }
        } else
          g_print ("%s type: N/A\n", plugin->desc.name);
      } else if (GST_IS_SCHEDULER_FACTORY (feature)) {
        GstSchedulerFactory *factory;

        factory = GST_SCHEDULER_FACTORY (feature);
        g_print ("%s:  %s: %s\n", plugin->desc.name,
            GST_PLUGIN_FEATURE_NAME (factory), factory->longdesc);
      } else {
        g_print ("%s:  %s (%s)\n", plugin->desc.name,
            GST_PLUGIN_FEATURE_NAME (feature),
            g_type_name (G_OBJECT_TYPE (feature)));
      }

      features = g_list_next (features);
    }
  }
}

static void
print_plugin_info (GstPlugin * plugin)
{
  GList *features;
  gint num_features = 0;
  gint num_elements = 0;
  gint num_autoplug = 0;
  gint num_types = 0;
  gint num_schedulers = 0;
  gint num_indexes = 0;
  gint num_other = 0;

  g_print ("Plugin Details:\n");
  g_print ("  Name:\t\t%s\n", plugin->desc.name);
  g_print ("  Description:\t%s\n", plugin->desc.description);
  g_print ("  Filename:\t%s\n", plugin->filename);
  g_print ("  Version:\t%s\n", plugin->desc.version);
  g_print ("  License:\t%s\n", plugin->desc.license);
  g_print ("  Package:\t%s\n", plugin->desc.package);
  g_print ("  Origin URL:\t%s\n", plugin->desc.origin);
  g_print ("\n");

  features = gst_plugin_get_feature_list (plugin);

  while (features) {
    GstPluginFeature *feature;

    feature = GST_PLUGIN_FEATURE (features->data);

    if (GST_IS_ELEMENT_FACTORY (feature)) {
      GstElementFactory *factory;

      factory = GST_ELEMENT_FACTORY (feature);
      g_print ("  %s: %s\n", GST_OBJECT_NAME (factory),
          factory->details.longname);
      num_elements++;
    }
#ifndef GST_DISABLE_INDEX
    else if (GST_IS_INDEX_FACTORY (feature)) {
      GstIndexFactory *factory;

      factory = GST_INDEX_FACTORY (feature);
      g_print ("  %s: %s\n", GST_OBJECT_NAME (factory), factory->longdesc);
      num_indexes++;
    }
#endif
    else if (GST_IS_TYPE_FIND_FACTORY (feature)) {
      GstTypeFindFactory *factory;

      factory = GST_TYPE_FIND_FACTORY (feature);
      if (factory->extensions) {
        guint i = 0;

        g_print ("%s type: ", plugin->desc.name);
        while (factory->extensions[i]) {
          g_print ("%s%s", i > 0 ? ", " : "", factory->extensions[i]);
          i++;
        }
      } else
        g_print ("%s type: N/A\n", plugin->desc.name);
      num_types++;
    } else if (GST_IS_SCHEDULER_FACTORY (feature)) {
      GstSchedulerFactory *factory;

      factory = GST_SCHEDULER_FACTORY (feature);
      g_print ("  %s: %s\n", GST_OBJECT_NAME (factory), factory->longdesc);
      num_schedulers++;
    } else {
      g_print ("  %s (%s)\n", gst_object_get_name (GST_OBJECT (feature)),
          g_type_name (G_OBJECT_TYPE (feature)));
      num_other++;
    }
    num_features++;
    features = g_list_next (features);
  }
  g_print ("\n  %d features:\n", num_features);
  if (num_elements > 0)
    g_print ("  +-- %d elements\n", num_elements);
  if (num_autoplug > 0)
    g_print ("  +-- %d autopluggers\n", num_autoplug);
  if (num_types > 0)
    g_print ("  +-- %d types\n", num_types);
  if (num_schedulers > 0)
    g_print ("  +-- %d schedulers\n", num_schedulers);
  if (num_indexes > 0)
    g_print ("  +-- %d indexes\n", num_indexes);
  if (num_other > 0)
    g_print ("  +-- %d other objects\n", num_other);

  g_print ("\n");
}


int
main (int argc, char *argv[])
{
  GstElementFactory *factory;
  GstPlugin *plugin;
  gchar *so;
  struct poptOption options[] = {
    {"gst-inspect-plugin", 'p', POPT_ARG_STRING | POPT_ARGFLAG_STRIP, NULL, 0,
        "Show plugin details", NULL},
    {"gst-inspect-scheduler", 's', POPT_ARG_STRING | POPT_ARGFLAG_STRIP, NULL,
          0,
        "Show scheduler details", NULL},
    POPT_TABLEEND
  };

  setlocale (LC_ALL, "");

  gst_init_with_popt_table (&argc, &argv, options);
  gst_control_init (&argc, &argv);

  PUT_STRING (0, "<?xml version=\"1.0\"?>");

  /* if no arguments, print out list of elements */
  if (argc == 1) {
    print_element_list ();

    /* else we try to get a factory */
  } else {
    /* first check for help */
    if (strstr (argv[1], "-help")) {
      g_print ("Usage: %s\t\t\tList all registered elements\n", argv[0]);
      g_print ("       %s element-name\tShow element details\n", argv[0]);
      g_print ("       %s plugin-name[.so]\tShow information about plugin\n",
          argv[0]);
      return 0;
    }

    /* only search for a factory if there's not a '.so' */
    if (!strstr (argv[1], ".so")) {
      factory = gst_element_factory_find (argv[1]);

      /* if there's a factory, print out the info */
      if (factory)
        return print_element_info (factory);
      else {
        GstPluginFeature *feature;

        /* FIXME implement other pretty print function for these */
        feature = gst_registry_pool_find_feature (argv[1],
            GST_TYPE_SCHEDULER_FACTORY);
        if (feature) {
          g_print ("%s: a scheduler\n", argv[1]);
          return 0;
        }
#ifndef GST_DISABLE_INDEX
        feature = gst_registry_pool_find_feature (argv[1],
            GST_TYPE_INDEX_FACTORY);
        if (feature) {
          g_print ("%s: an index\n", argv[1]);
          return 0;
        }
#endif
        feature = gst_registry_pool_find_feature (argv[1],
            GST_TYPE_TYPE_FIND_FACTORY);
        if (feature) {
          g_print ("%s: a type find function\n", argv[1]);
          return 0;
        }
#ifndef GST_DISABLE_URI
        feature = gst_registry_pool_find_feature (argv[1],
            GST_TYPE_URI_HANDLER);
        if (feature) {
          g_print ("%s: an uri handler\n", argv[1]);
          return 0;
        }
#endif
      }
    } else {
      /* strip the .so */
      so = strstr (argv[1], ".so");
      so[0] = '\0';
    }

    /* otherwise assume it's a plugin */
    plugin = gst_registry_pool_find_plugin (argv[1]);

    /* if there is such a plugin, print out info */

    if (plugin) {
      print_plugin_info (plugin);
    } else {
      g_print ("no such element or plugin '%s'\n", argv[1]);
      return -1;
    }
  }

  return 0;
}