gstreamer/subprojects/gst-devtools/validate/gst/validate/media-descriptor.c

/**
 * Gstreamer
 *
 * Copyright (c) 2012, Collabora Ltd.
 * Author: Thibault Saunier <thibault.saunier@collabora.com>
 *
 * 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.
 */
#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include <string.h>
#include "media-descriptor.h"

#include "gst-validate-internal.h"

struct _GstValidateMediaDescriptorPrivate
{
  GstValidateMediaFileNode *filenode;
};

G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstValidateMediaDescriptor,
    gst_validate_media_descriptor, GST_TYPE_OBJECT,
    G_ADD_PRIVATE (GstValidateMediaDescriptor)
    G_IMPLEMENT_INTERFACE (GST_TYPE_VALIDATE_REPORTER, NULL));

static inline void
free_tagnode (GstValidateMediaTagNode * tagnode)
{
  g_free (tagnode->str_open);
  g_free (tagnode->str_close);
  if (tagnode->taglist)
    gst_tag_list_unref (tagnode->taglist);

  g_free (tagnode);
}

static inline void
free_tagsnode (GstValidateMediaTagsNode * tagsnode)
{
  g_free (tagsnode->str_open);
  g_free (tagsnode->str_close);
  g_list_free_full (tagsnode->tags, (GDestroyNotify) free_tagnode);
  g_free (tagsnode);
}

static inline void
free_framenode (GstValidateMediaFrameNode * framenode)
{
  g_free (framenode->str_open);
  g_free (framenode->str_close);

  if (framenode->buf)
    gst_buffer_unref (framenode->buf);

  g_free (framenode);
}

static inline void
free_segmentnode (GstValidateSegmentNode * segmentnode)
{
  g_free (segmentnode->str_open);
  g_free (segmentnode->str_close);

  g_free (segmentnode);
}

static inline void
free_streamnode (GstValidateMediaStreamNode * streamnode)
{
  if (streamnode->caps)
    gst_caps_unref (streamnode->caps);

  g_list_free_full (streamnode->frames, (GDestroyNotify) free_framenode);
  g_list_free_full (streamnode->segments, (GDestroyNotify) free_segmentnode);

  if (streamnode->pad)
    gst_object_unref (streamnode->pad);

  if (streamnode->tags)
    free_tagsnode (streamnode->tags);

  g_free (streamnode->padname);
  g_free (streamnode->id);
  g_free (streamnode->str_open);
  g_free (streamnode->str_close);
  g_free (streamnode);
}

void
gst_validate_filenode_free (GstValidateMediaFileNode * filenode)
{
  g_list_free_full (filenode->streams, (GDestroyNotify) free_streamnode);
  if (filenode->tags)
    free_tagsnode (filenode->tags);

  g_free (filenode->uri);

  if (filenode->caps)
    gst_caps_unref (filenode->caps);

  g_free (filenode->str_open);
  g_free (filenode->str_close);

  g_free (filenode);
}

gboolean
    gst_validate_tag_node_compare
    (GstValidateMediaTagNode * tnode, const GstTagList * tlist)
{
  if (gst_structure_is_equal (GST_STRUCTURE (tlist),
          GST_STRUCTURE (tnode->taglist)) == FALSE) {
    return FALSE;
  }

  tnode->found = TRUE;

  return TRUE;
}

enum
{
  PROP_0,
  PROP_RUNNER,
  PROP_LAST
};


static void
gst_validate_media_descriptor_dispose (GstValidateMediaDescriptor * self)
{
  G_OBJECT_CLASS (gst_validate_media_descriptor_parent_class)->dispose (G_OBJECT
      (self));
}

static void
gst_validate_media_descriptor_finalize (GstValidateMediaDescriptor * self)
{
  if (self->priv->filenode)
    gst_validate_filenode_free (self->priv->filenode);

  G_OBJECT_CLASS (gst_validate_media_descriptor_parent_class)->finalize
      (G_OBJECT (self));
}

static void
gst_validate_media_descriptor_init (GstValidateMediaDescriptor * self)
{
  self->priv = gst_validate_media_descriptor_get_instance_private (self);
  self->priv->filenode = g_new0 (GstValidateMediaFileNode, 1);
}

static void
_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  switch (prop_id) {
    case PROP_RUNNER:
      /* we assume the runner is valid as long as this scenario is,
       * no ref taken */
      gst_validate_reporter_set_runner (GST_VALIDATE_REPORTER (object),
          g_value_get_object (value));
      break;
    default:
      break;
  }
}

static void
_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  switch (prop_id) {
    case PROP_RUNNER:
      /* we assume the runner is valid as long as this scenario is,
       * no ref taken */
      g_value_take_object (value,
          gst_validate_reporter_get_runner (GST_VALIDATE_REPORTER (object)));
      break;
    default:
      break;
  }
}

static void
gst_validate_media_descriptor_class_init (GstValidateMediaDescriptorClass *
    self_class)
{
  GObjectClass *object_class = G_OBJECT_CLASS (self_class);

  object_class->dispose =
      (void (*)(GObject * object)) gst_validate_media_descriptor_dispose;
  object_class->finalize =
      (void (*)(GObject * object)) gst_validate_media_descriptor_finalize;

  object_class->get_property = _get_property;
  object_class->set_property = _set_property;

  g_object_class_install_property (object_class, PROP_RUNNER,
      g_param_spec_object ("validate-runner", "VALIDATE Runner",
          "The Validate runner to report errors to",
          GST_TYPE_VALIDATE_RUNNER,
          G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE));
}

static gint
compare_tags (GstValidateMediaDescriptor * ref,
    GstValidateMediaStreamNode * rstream, GstValidateMediaStreamNode * cstream)
{
  gboolean found;
  GstValidateMediaTagNode *rtag, *ctag;
  GList *rtag_list, *ctag_list;
  GstValidateMediaTagsNode *rtags, *ctags;

  rtags = rstream->tags;
  ctags = cstream->tags;
  if (!rtags && !ctags)
    return 1;
  else if (!rtags && ctags) {
    GList *taglist;
    GString *all_tags = g_string_new (NULL);

    for (taglist = ctags->tags; taglist; taglist = taglist->next) {
      gchar *stags = gst_tag_list_to_string (((GstValidateMediaTagNode *)
              taglist->data)->taglist);

      g_string_append_printf (all_tags, "%s\n", stags);
      g_free (stags);
    }

    GST_VALIDATE_REPORT (ref, FILE_TAG_DETECTION_INCORRECT,
        "Reference descriptor for stream %s has NO tags"
        " but tags found: %s", rstream->id, all_tags->str);

    g_string_free (all_tags, TRUE);

    return 0;
  } else if (rtags && !ctags) {
    GList *taglist;
    GString *all_tags = g_string_new (NULL);

    for (taglist = rtags->tags; taglist; taglist = taglist->next) {
      gchar *stags = gst_tag_list_to_string (((GstValidateMediaTagNode *)
              taglist->data)->taglist);

      g_string_append_printf (all_tags, "%s\n", stags);
      g_free (stags);
    }

    GST_VALIDATE_REPORT (ref, FILE_TAG_DETECTION_INCORRECT,
        "Reference descriptor for stream %s has tags:\n %s\n"
        " but NO tags found on the stream", rstream->id, all_tags->str);

    g_string_free (all_tags, TRUE);
    return 0;
  }

  for (rtag_list = rtags->tags; rtag_list; rtag_list = rtag_list->next) {
    rtag = rtag_list->data;
    found = FALSE;
    for (ctag_list = ctags->tags; ctag_list; ctag_list = ctag_list->next) {
      ctag = ctag_list->data;
      if (gst_tag_list_is_equal (rtag->taglist, ctag->taglist)) {
        found = TRUE;

        break;
      }
    }

    if (found == FALSE) {
      gchar *rtaglist = gst_tag_list_to_string (rtag->taglist);

      GST_VALIDATE_REPORT (ref, FILE_TAG_DETECTION_INCORRECT,
          "Reference descriptor for stream %s has tags %s"
          " but no equivalent taglist was found on the compared stream",
          rstream->id, rtaglist);
      g_free (rtaglist);

      return 0;
    }
  }

  return 1;
}

/* Workaround false warning caused by differnet file path */
static gboolean
stream_id_is_equal (const gchar * uri, const gchar * rid, const gchar * cid)
{
  GChecksum *cs;
  const gchar *stream_id;

  /* Simple case it's the same */
  if (g_strcmp0 (rid, cid) == 0)
    return TRUE;

  /* If it's not from file or from our local http server, it should have been the same */
  if (!g_str_has_prefix (uri, "file://")
      && !g_str_has_prefix (uri, "imagesequence:/")
      && !g_str_has_prefix (uri, "http://127.0.0.1"))
    return FALSE;

  /* taken from basesrc, compute the reference stream-id */
  cs = g_checksum_new (G_CHECKSUM_SHA256);
  g_checksum_update (cs, (const guchar *) uri, strlen (uri));

  stream_id = g_checksum_get_string (cs);

  /* If the reference stream_id is the URI SHA256, that means we have a single
   * stream file (no demuxing), just assume it's the same id */
  if (g_strcmp0 (rid, stream_id) == 0) {
    g_checksum_free (cs);
    return TRUE;
  }

  /* It should always be prefixed with the SHA256, otherwise it likely means
   * that basesrc is no longer using a SHA256 checksum on the URI, and this
   * workaround will need to be fixed */
  if (!g_str_has_prefix (rid, stream_id)) {
    g_checksum_free (cs);
    return FALSE;
  }
  g_checksum_free (cs);

  /* we strip the IDS to the delimitor, and then compare */
  rid = strchr (rid, '/');
  cid = strchr (cid, '/');

  if (rid == NULL || cid == NULL)
    return FALSE;

  if (g_strcmp0 (rid, cid) == 0)
    return TRUE;

  return FALSE;
}

static gboolean
compare_segments (GstValidateMediaDescriptor * ref,
    gint i,
    GstValidateMediaStreamNode * rstream,
    GstValidateSegmentNode * rsegment, GstValidateSegmentNode * csegment)
{
  if (rsegment->next_frame_id != csegment->next_frame_id) {
    GST_VALIDATE_REPORT (ref, FILE_SEGMENT_INCORRECT,
        "Segment %" GST_SEGMENT_FORMAT
        " didn't come before the same frame ID, expected to come before %d, came before %d",
        &rsegment->segment, rsegment->next_frame_id, csegment->next_frame_id);
    return FALSE;
  }
#define CHECK_SEGMENT_FIELD(fieldname, format) \
  if (rsegment->segment.fieldname != csegment->segment.fieldname) { \
    GST_ERROR ("Expected: %" GST_SEGMENT_FORMAT " got: %" GST_SEGMENT_FORMAT, \
      &rsegment->segment, &csegment->segment); \
    GST_VALIDATE_REPORT (ref, FILE_SEGMENT_INCORRECT, \
        "Stream %s segment %d has " #fieldname \
        " mismatch, Expected " format " got: " format , \
        rstream->id, i, rsegment->segment.fieldname, \
        csegment->segment.fieldname); \
      return FALSE; \
  }

  CHECK_SEGMENT_FIELD (flags, "%d");
  CHECK_SEGMENT_FIELD (rate, "%f");
  CHECK_SEGMENT_FIELD (applied_rate, "%f");
  CHECK_SEGMENT_FIELD (base, "%" G_GUINT64_FORMAT);
  CHECK_SEGMENT_FIELD (offset, "%" G_GUINT64_FORMAT);
  CHECK_SEGMENT_FIELD (start, "%" G_GUINT64_FORMAT);
  CHECK_SEGMENT_FIELD (stop, "%" G_GUINT64_FORMAT);
  CHECK_SEGMENT_FIELD (time, "%" G_GUINT64_FORMAT);
  /* We do not compare segment position since it's a field for usage only within the element */
  /* CHECK_SEGMENT_FIELD (position, "%" G_GUINT64_FORMAT); */
  CHECK_SEGMENT_FIELD (duration, "%" G_GUINT64_FORMAT);

  return TRUE;
}

static void
append_segment_diff (GString * diff, char diffsign, GList * segments)
{
  GList *tmp;

  for (tmp = segments; tmp; tmp = tmp->next) {
    gchar *ssegment =
        gst_info_strdup_printf ("%c %" GST_SEGMENT_FORMAT "\n", diffsign,
        &((GstValidateSegmentNode *) tmp->data)->segment);
    g_string_append (diff, ssegment);
    g_free (ssegment);

  }
}

static gboolean
compare_segment_list (GstValidateMediaDescriptor * ref,
    GstValidateMediaStreamNode * rstream, GstValidateMediaStreamNode * cstream)
{
  gint i;
  GList *rsegments, *csegments;

  /* Keep compatibility with media stream files that do not have segments */
  if (rstream->segments
      && g_list_length (rstream->segments) !=
      g_list_length (cstream->segments)) {
    GString *diff = g_string_new (NULL);

    append_segment_diff (diff, '-', rstream->segments);
    append_segment_diff (diff, '+', cstream->segments);
    GST_VALIDATE_REPORT (ref, FILE_SEGMENT_INCORRECT,
        "Stream reference has %i segments, compared one has %i segments\n%s",
        g_list_length (rstream->segments), g_list_length (cstream->segments),
        diff->str);
    g_string_free (diff, TRUE);
  }

  for (i = 0, rsegments = rstream->segments, csegments = cstream->segments;
      rsegments;
      rsegments = rsegments->next, csegments = csegments->next, i++) {
    GstValidateSegmentNode *rsegment, *csegment;

    if (csegments == NULL) {
      /* The list was checked to be of the same size */
      g_assert_not_reached ();
      return FALSE;
    }

    rsegment = rsegments->data;
    csegment = csegments->data;

    if (!compare_segments (ref, i, rstream, rsegment, csegment))
      return FALSE;
  }

  return TRUE;
}

static gboolean
compare_frames (GstValidateMediaDescriptor * ref,
    GstValidateMediaStreamNode *
    rstream, GstValidateMediaFrameNode * rframe,
    GstValidateMediaFrameNode * cframe)
{
  if (rframe->id != cframe->id) {
    GST_VALIDATE_REPORT (ref, FILE_FRAMES_INCORRECT,
        "Stream frame %s ids mismatch: %" G_GUINT64_FORMAT " != %"
        G_GUINT64_FORMAT, rstream->id, rframe->id, cframe->id);
    return FALSE;
  }
#define CHECK_FRAME_FIELD(fieldname, format, unknown_value) \
  if (rframe->fieldname != unknown_value && rframe->fieldname != cframe->fieldname) { \
    GST_VALIDATE_REPORT (ref, FILE_FRAMES_INCORRECT, \
        "Stream %s frames with id %" G_GUINT64_FORMAT " have " #fieldname \
        " mismatch. Expected " format ", got " format, rstream->id, \
        rframe->id, rframe->fieldname, cframe->fieldname); \
    return FALSE; \
  }

  CHECK_FRAME_FIELD (pts, "%" G_GUINT64_FORMAT, GST_VALIDATE_UNKNOWN_UINT64);
  CHECK_FRAME_FIELD (dts, "%" G_GUINT64_FORMAT, GST_VALIDATE_UNKNOWN_UINT64);
  CHECK_FRAME_FIELD (duration, "%" G_GUINT64_FORMAT,
      GST_VALIDATE_UNKNOWN_UINT64);
  CHECK_FRAME_FIELD (running_time, "%" G_GUINT64_FORMAT,
      GST_VALIDATE_UNKNOWN_UINT64);
  CHECK_FRAME_FIELD (is_keyframe, "%d", GST_VALIDATE_UNKNOWN_BOOL);

  return TRUE;
}

static gboolean
compare_frames_list (GstValidateMediaDescriptor * ref,
    GstValidateMediaStreamNode * rstream, GstValidateMediaStreamNode * cstream)
{
  GList *rframes, *cframes;

  if (g_list_length (rstream->frames) != g_list_length (cstream->frames)) {
    GST_VALIDATE_REPORT (ref, FILE_FRAMES_INCORRECT,
        "Stream reference has %i frames, compared one has %i frames",
        g_list_length (rstream->frames), g_list_length (cstream->frames));
    return FALSE;
  }

  for (rframes = rstream->frames, cframes = cstream->frames; rframes;
      rframes = g_list_next (rframes), cframes = g_list_next (cframes)) {
    GstValidateMediaFrameNode *rframe, *cframe;

    if (cframes == NULL) {
      /* The list was checked to be of the same size */
      g_assert_not_reached ();
      return FALSE;
    }

    rframe = rframes->data;
    cframe = cframes->data;

    if (!compare_frames (ref, rstream, rframe, cframe)) {
      return FALSE;
    }
  }

  return TRUE;
}

static GstCaps *
caps_cleanup_parsing_fields (GstCaps * caps)
{
  gint i;
  GstCaps *res = gst_caps_copy (caps);

  for (i = 0; i < gst_caps_get_size (res); i++) {
    GstStructure *s = gst_caps_get_structure (res, i);

    gst_structure_remove_fields (s, "stream-format", "codec_data", "parsed",
        "frames", "alignment", NULL);
  }

  return res;
}

/*  Return TRUE if found FALSE otherwise */
static gboolean
compare_streams (GstValidateMediaDescriptor * ref,
    GstValidateMediaStreamNode * rstream, GstValidateMediaStreamNode * cstream)
{
  GstCaps *rcaps, *ccaps;

  if (!stream_id_is_equal (ref->priv->filenode->uri, rstream->id, cstream->id))
    return FALSE;

  rcaps = caps_cleanup_parsing_fields (rstream->caps);
  ccaps = caps_cleanup_parsing_fields (cstream->caps);

  if (!gst_caps_is_equal (rcaps, ccaps)) {
    gchar *rcaps_str = gst_caps_to_string (rcaps),
        *ccaps_str = gst_caps_to_string (ccaps);
    GST_VALIDATE_REPORT (ref, FILE_PROFILE_INCORRECT,
        "Reference descriptor for stream %s has caps: %s"
        " but compared stream %s has caps: %s",
        rstream->id, rcaps_str, cstream->id, ccaps_str);
    g_free (rcaps_str);
    g_free (ccaps_str);
  }

  gst_caps_unref (rcaps);
  gst_caps_unref (ccaps);
  /* We ignore the return value on purpose as this is not critical */
  compare_tags (ref, rstream, cstream);

  compare_segment_list (ref, rstream, cstream);
  compare_frames_list (ref, rstream, cstream);

  return TRUE;
}

gboolean
gst_validate_media_descriptors_compare (GstValidateMediaDescriptor * ref,
    GstValidateMediaDescriptor * compared)
{
  GList *rstream_list;
  GstValidateMediaFileNode
      * rfilenode = ref->priv->filenode, *cfilenode = compared->priv->filenode;

  if (rfilenode->duration != cfilenode->duration) {
    GST_VALIDATE_REPORT (ref, FILE_DURATION_INCORRECT,
        "Duration %" GST_TIME_FORMAT " is different from the reference %"
        GST_TIME_FORMAT, GST_TIME_ARGS (cfilenode->duration),
        GST_TIME_ARGS (rfilenode->duration));
  }

  if (rfilenode->seekable != cfilenode->seekable) {
    GST_VALIDATE_REPORT (ref, FILE_SEEKABLE_INCORRECT,
        "File known as %s but is reported %s now",
        rfilenode->seekable ? "seekable" : "not seekable",
        cfilenode->seekable ? "seekable" : "not seekable");
  }

  if (g_list_length (rfilenode->streams) != g_list_length (cfilenode->streams)) {
    GST_VALIDATE_REPORT (ref, FILE_PROFILE_INCORRECT,
        "Reference descriptor has %i streams != compared which has %i streams",
        g_list_length (rfilenode->streams), g_list_length (cfilenode->streams));

    return FALSE;
  }


  for (rstream_list = rfilenode->streams; rstream_list;
      rstream_list = rstream_list->next) {
    GList *cstream_list;
    gboolean sfound = FALSE;

    for (cstream_list = cfilenode->streams; cstream_list;
        cstream_list = cstream_list->next) {

      sfound = compare_streams (ref, rstream_list->data, cstream_list->data);
      if (sfound)
        break;
    }

    if (!sfound) {
      GST_VALIDATE_REPORT (ref, FILE_PROFILE_INCORRECT,
          "Could not find stream %s in the compared descriptor",
          ((GstValidateMediaStreamNode *) rstream_list->data)->id);
    }
  }

  return TRUE;
}

gboolean
gst_validate_media_descriptor_detects_frames (GstValidateMediaDescriptor * self)
{
  g_return_val_if_fail (GST_IS_VALIDATE_MEDIA_DESCRIPTOR (self), FALSE);
  g_return_val_if_fail (self->priv->filenode, FALSE);

  return self->priv->filenode->frame_detection;
}

/**
 * gst_validate_media_descriptor_get_buffers: (skip):
 */
gboolean
gst_validate_media_descriptor_get_buffers (GstValidateMediaDescriptor * self,
    GstPad * pad, GCompareFunc compare_func, GList ** bufs)
{
  GList *tmpstream, *tmpframe;
  gboolean check = (pad == NULL), ret = FALSE;
  GstCaps *pad_caps = gst_pad_get_current_caps (pad);

  g_return_val_if_fail (GST_IS_VALIDATE_MEDIA_DESCRIPTOR (self), FALSE);
  g_return_val_if_fail (self->priv->filenode, FALSE);

  for (tmpstream = self->priv->filenode->streams;
      tmpstream; tmpstream = tmpstream->next) {
    GstValidateMediaStreamNode
        * streamnode = (GstValidateMediaStreamNode *) tmpstream->data;

    if (pad && streamnode->pad == pad)
      check = TRUE;

    if (!streamnode->pad && gst_caps_is_subset (pad_caps, streamnode->caps)) {
      check = TRUE;
    }

    if (check) {
      ret = TRUE;
      for (tmpframe = streamnode->frames; tmpframe; tmpframe = tmpframe->next) {
        if (compare_func)
          *bufs =
              g_list_insert_sorted (*bufs,
              gst_buffer_ref ((
                      (GstValidateMediaFrameNode
                          *) tmpframe->data)->buf), compare_func);
        else
          *bufs =
              g_list_prepend (*bufs,
              gst_buffer_ref ((
                      (GstValidateMediaFrameNode *) tmpframe->data)->buf));
      }

      if (pad != NULL)
        goto done;
    }
  }


done:

  if (compare_func == NULL)
    *bufs = g_list_reverse (*bufs);

  gst_caps_unref (pad_caps);
  return ret;
}

gboolean
gst_validate_media_descriptor_has_frame_info (GstValidateMediaDescriptor * self)
{
  GList *tmpstream;

  for (tmpstream = self->priv->filenode->streams;
      tmpstream; tmpstream = tmpstream->next) {
    GstValidateMediaStreamNode
        * streamnode = (GstValidateMediaStreamNode *) tmpstream->data;

    if (g_list_length (streamnode->frames))
      return TRUE;
  }

  return FALSE;
}

GstClockTime
gst_validate_media_descriptor_get_duration (GstValidateMediaDescriptor * self)
{
  g_return_val_if_fail (GST_IS_VALIDATE_MEDIA_DESCRIPTOR (self), FALSE);
  g_return_val_if_fail (self->priv->filenode, FALSE);

  return self->priv->filenode->duration;
}

gboolean
gst_validate_media_descriptor_get_seekable (GstValidateMediaDescriptor * self)
{
  g_return_val_if_fail (GST_IS_VALIDATE_MEDIA_DESCRIPTOR (self), FALSE);
  g_return_val_if_fail (self->priv->filenode, FALSE);

  return self->priv->filenode->seekable;
}

/**
 * gst_validate_media_descriptor_get_pads: (skip):
 */
GList *
gst_validate_media_descriptor_get_pads (GstValidateMediaDescriptor * self)
{
  GList *ret = NULL, *tmp;

  for (tmp = self->priv->filenode->streams; tmp; tmp = tmp->next) {
    GstValidateMediaStreamNode
        * snode = (GstValidateMediaStreamNode *) tmp->data;
    ret = g_list_append (ret, gst_pad_new (snode->padname, GST_PAD_UNKNOWN));
  }

  return ret;
}


GstValidateMediaFileNode *
gst_validate_media_descriptor_get_file_node (GstValidateMediaDescriptor * self)
{
  return self->priv->filenode;
}